fs/ksmbd/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14
  15 #include "glob.h"
  16 #include "smbfsctl.h"
  17 #include "oplock.h"
  18 #include "smbacl.h"
  19
  20 #include "auth.h"
  21 #include "asn1.h"
  22 #include "connection.h"
  23 #include "transport_ipc.h"
  24 #include "transport_rdma.h"
  25 #include "vfs.h"
  26 #include "vfs_cache.h"
  27 #include "misc.h"
  28
  29 #include "server.h"
  30 #include "smb_common.h"
  31 #include "smbstatus.h"
  32 #include "ksmbd_work.h"
  33 #include "mgmt/user_config.h"
  34 #include "mgmt/share_config.h"
  35 #include "mgmt/tree_connect.h"
  36 #include "mgmt/user_session.h"
  37 #include "mgmt/ksmbd_ida.h"
  38 #include "ndr.h"
  39
  40 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  41 {
  42         if (work->next_smb2_rcv_hdr_off) {
  43                 *req = ksmbd_req_buf_next(work);
  44                 *rsp = ksmbd_resp_buf_next(work);
  45         } else {
  46                 *req = smb2_get_msg(work->request_buf);
  47                 *rsp = smb2_get_msg(work->response_buf);
  48         }
  49 }
  50
  51 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  52
  53 /**
  54  * check_session_id() - check for valid session id in smb header
  55  * @conn:       connection instance
  56  * @id:         session id from smb header
  57  *
  58  * Return:      1 if valid session id, otherwise 0
  59  */
  60 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  61 {
  62         struct ksmbd_session *sess;
  63
  64         if (id == 0 || id == -1)
  65                 return false;
  66
  67         sess = ksmbd_session_lookup_all(conn, id);
  68         if (sess)
  69                 return true;
  70         pr_err("Invalid user session id: %llu\n", id);
  71         return false;
  72 }
  73
  74 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  75 {
  76         struct channel *chann;
  77
  78         list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
  79                 if (chann->conn == conn)
  80                         return chann;
  81         }
  82
  83         return NULL;
  84 }
  85
  86 /**
  87  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  88  * @work:       smb work
  89  *
  90  * Return:      0 if there is a tree connection matched or these are
  91  *              skipable commands, otherwise error
  92  */
  93 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  94 {
  95         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
  96         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  97         int tree_id;
  98
  99         work->tcon = NULL;
 100         if (cmd == SMB2_TREE_CONNECT_HE ||
 101             cmd ==  SMB2_CANCEL_HE ||
 102             cmd ==  SMB2_LOGOFF_HE) {
 103                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 104                 return 0;
 105         }
 106
 107         if (xa_empty(&work->sess->tree_conns)) {
 108                 ksmbd_debug(SMB, "NO tree connected\n");
 109                 return -ENOENT;
 110         }
 111
 112         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 113         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 114         if (!work->tcon) {
 115                 pr_err("Invalid tid %d\n", tree_id);
 116                 return -EINVAL;
 117         }
 118
 119         return 1;
 120 }
 121
 122 /**
 123  * smb2_set_err_rsp() - set error response code on smb response
 124  * @work:       smb work containing response buffer
 125  */
 126 void smb2_set_err_rsp(struct ksmbd_work *work)
 127 {
 128         struct smb2_err_rsp *err_rsp;
 129
 130         if (work->next_smb2_rcv_hdr_off)
 131                 err_rsp = ksmbd_resp_buf_next(work);
 132         else
 133                 err_rsp = smb2_get_msg(work->response_buf);
 134
 135         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 136                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 137                 err_rsp->ErrorContextCount = 0;
 138                 err_rsp->Reserved = 0;
 139                 err_rsp->ByteCount = 0;
 140                 err_rsp->ErrorData[0] = 0;
 141                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 142         }
 143 }
 144
 145 /**
 146  * is_smb2_neg_cmd() - is it smb2 negotiation command
 147  * @work:       smb work containing smb header
 148  *
 149  * Return:      true if smb2 negotiation command, otherwise false
 150  */
 151 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 152 {
 153         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 154
 155         /* is it SMB2 header ? */
 156         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 157                 return false;
 158
 159         /* make sure it is request not response message */
 160         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 161                 return false;
 162
 163         if (hdr->Command != SMB2_NEGOTIATE)
 164                 return false;
 165
 166         return true;
 167 }
 168
 169 /**
 170  * is_smb2_rsp() - is it smb2 response
 171  * @work:       smb work containing smb response buffer
 172  *
 173  * Return:      true if smb2 response, otherwise false
 174  */
 175 bool is_smb2_rsp(struct ksmbd_work *work)
 176 {
 177         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 178
 179         /* is it SMB2 header ? */
 180         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 181                 return false;
 182
 183         /* make sure it is response not request message */
 184         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 185                 return false;
 186
 187         return true;
 188 }
 189
 190 /**
 191  * get_smb2_cmd_val() - get smb command code from smb header
 192  * @work:       smb work containing smb request buffer
 193  *
 194  * Return:      smb2 request command value
 195  */
 196 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 197 {
 198         struct smb2_hdr *rcv_hdr;
 199
 200         if (work->next_smb2_rcv_hdr_off)
 201                 rcv_hdr = ksmbd_req_buf_next(work);
 202         else
 203                 rcv_hdr = smb2_get_msg(work->request_buf);
 204         return le16_to_cpu(rcv_hdr->Command);
 205 }
 206
 207 /**
 208  * set_smb2_rsp_status() - set error response code on smb2 header
 209  * @work:       smb work containing response buffer
 210  * @err:        error response code
 211  */
 212 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 213 {
 214         struct smb2_hdr *rsp_hdr;
 215
 216         if (work->next_smb2_rcv_hdr_off)
 217                 rsp_hdr = ksmbd_resp_buf_next(work);
 218         else
 219                 rsp_hdr = smb2_get_msg(work->response_buf);
 220         rsp_hdr->Status = err;
 221         smb2_set_err_rsp(work);
 222 }
 223
 224 /**
 225  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 226  * @work:       smb work containing smb request buffer
 227  *
 228  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 229  * dialect auto-negotiation.
 230  */
 231 int init_smb2_neg_rsp(struct ksmbd_work *work)
 232 {
 233         struct smb2_hdr *rsp_hdr;
 234         struct smb2_negotiate_rsp *rsp;
 235         struct ksmbd_conn *conn = work->conn;
 236
 237         if (conn->need_neg == false)
 238                 return -EINVAL;
 239
 240         *(__be32 *)work->response_buf =
 241                 cpu_to_be32(conn->vals->header_size);
 242
 243         rsp_hdr = smb2_get_msg(work->response_buf);
 244         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 245         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 246         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 247         rsp_hdr->CreditRequest = cpu_to_le16(2);
 248         rsp_hdr->Command = SMB2_NEGOTIATE;
 249         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 250         rsp_hdr->NextCommand = 0;
 251         rsp_hdr->MessageId = 0;
 252         rsp_hdr->Id.SyncId.ProcessId = 0;
 253         rsp_hdr->Id.SyncId.TreeId = 0;
 254         rsp_hdr->SessionId = 0;
 255         memset(rsp_hdr->Signature, 0, 16);
 256
 257         rsp = smb2_get_msg(work->response_buf);
 258
 259         WARN_ON(ksmbd_conn_good(work));
 260
 261         rsp->StructureSize = cpu_to_le16(65);
 262         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 263         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 264         /* Not setting conn guid rsp->ServerGUID, as it
 265          * not used by client for identifying connection
 266          */
 267         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 268         /* Default Max Message Size till SMB2.0, 64K*/
 269         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 270         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 271         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 272
 273         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 274         rsp->ServerStartTime = 0;
 275
 276         rsp->SecurityBufferOffset = cpu_to_le16(128);
 277         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 278         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 279                 le16_to_cpu(rsp->SecurityBufferOffset));
 280         inc_rfc1001_len(work->response_buf,
 281                         sizeof(struct smb2_negotiate_rsp) -
 282                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 283                         AUTH_GSS_LENGTH);
 284         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 285         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 286                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 287         conn->use_spnego = true;
 288
 289         ksmbd_conn_set_need_negotiate(work);
 290         return 0;
 291 }
 292
 293 /**
 294  * smb2_set_rsp_credits() - set number of credits in response buffer
 295  * @work:       smb work containing smb response buffer
 296  */
 297 int smb2_set_rsp_credits(struct ksmbd_work *work)
 298 {
 299         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 300         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 301         struct ksmbd_conn *conn = work->conn;
 302         unsigned short credits_requested, aux_max;
 303         unsigned short credit_charge, credits_granted = 0;
 304
 305         if (work->send_no_response)
 306                 return 0;
 307
 308         hdr->CreditCharge = req_hdr->CreditCharge;
 309
 310         if (conn->total_credits > conn->vals->max_credits) {
 311                 hdr->CreditRequest = 0;
 312                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 313                 return -EINVAL;
 314         }
 315
 316         credit_charge = max_t(unsigned short,
 317                               le16_to_cpu(req_hdr->CreditCharge), 1);
 318         if (credit_charge > conn->total_credits) {
 319                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 320                             credit_charge, conn->total_credits);
 321                 return -EINVAL;
 322         }
 323
 324         conn->total_credits -= credit_charge;
 325         conn->outstanding_credits -= credit_charge;
 326         credits_requested = max_t(unsigned short,
 327                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 328
 329         /* according to smb2.credits smbtorture, Windows server
 330          * 2016 or later grant up to 8192 credits at once.
 331          *
 332          * TODO: Need to adjuct CreditRequest value according to
 333          * current cpu load
 334          */
 335         if (hdr->Command == SMB2_NEGOTIATE)
 336                 aux_max = 1;
 337         else
 338                 aux_max = conn->vals->max_credits - credit_charge;
 339         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 340
 341         if (conn->vals->max_credits - conn->total_credits < credits_granted)
 342                 credits_granted = conn->vals->max_credits -
 343                         conn->total_credits;
 344
 345         conn->total_credits += credits_granted;
 346         work->credits_granted += credits_granted;
 347
 348         if (!req_hdr->NextCommand) {
 349                 /* Update CreditRequest in last request */
 350                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 351         }
 352         ksmbd_debug(SMB,
 353                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 354                     credits_requested, credits_granted,
 355                     conn->total_credits);
 356         return 0;
 357 }
 358
 359 /**
 360  * init_chained_smb2_rsp() - initialize smb2 chained response
 361  * @work:       smb work containing smb response buffer
 362  */
 363 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 364 {
 365         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 366         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 367         struct smb2_hdr *rsp_hdr;
 368         struct smb2_hdr *rcv_hdr;
 369         int next_hdr_offset = 0;
 370         int len, new_len;
 371
 372         /* Len of this response = updated RFC len - offset of previous cmd
 373          * in the compound rsp
 374          */
 375
 376         /* Storing the current local FID which may be needed by subsequent
 377          * command in the compound request
 378          */
 379         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 380                 work->compound_fid =
 381                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 382                                 VolatileFileId);
 383                 work->compound_pfid =
 384                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 385                                 PersistentFileId);
 386                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 387         }
 388
 389         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 390         next_hdr_offset = le32_to_cpu(req->NextCommand);
 391
 392         new_len = ALIGN(len, 8);
 393         inc_rfc1001_len(work->response_buf,
 394                         sizeof(struct smb2_hdr) + new_len - len);
 395         rsp->NextCommand = cpu_to_le32(new_len);
 396
 397         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 398         work->next_smb2_rsp_hdr_off += new_len;
 399         ksmbd_debug(SMB,
 400                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 401                     new_len, work->next_smb2_rcv_hdr_off,
 402                     work->next_smb2_rsp_hdr_off);
 403
 404         rsp_hdr = ksmbd_resp_buf_next(work);
 405         rcv_hdr = ksmbd_req_buf_next(work);
 406
 407         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 408                 ksmbd_debug(SMB, "related flag should be set\n");
 409                 work->compound_fid = KSMBD_NO_FID;
 410                 work->compound_pfid = KSMBD_NO_FID;
 411         }
 412         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 413         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 414         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 415         rsp_hdr->Command = rcv_hdr->Command;
 416
 417         /*
 418          * Message is response. We don't grant oplock yet.
 419          */
 420         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 421                                 SMB2_FLAGS_RELATED_OPERATIONS);
 422         rsp_hdr->NextCommand = 0;
 423         rsp_hdr->MessageId = rcv_hdr->MessageId;
 424         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 425         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 426         rsp_hdr->SessionId = rcv_hdr->SessionId;
 427         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 428 }
 429
 430 /**
 431  * is_chained_smb2_message() - check for chained command
 432  * @work:       smb work containing smb request buffer
 433  *
 434  * Return:      true if chained request, otherwise false
 435  */
 436 bool is_chained_smb2_message(struct ksmbd_work *work)
 437 {
 438         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 439         unsigned int len, next_cmd;
 440
 441         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 442                 return false;
 443
 444         hdr = ksmbd_req_buf_next(work);
 445         next_cmd = le32_to_cpu(hdr->NextCommand);
 446         if (next_cmd > 0) {
 447                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 448                         __SMB2_HEADER_STRUCTURE_SIZE >
 449                     get_rfc1002_len(work->request_buf)) {
 450                         pr_err("next command(%u) offset exceeds smb msg size\n",
 451                                next_cmd);
 452                         return false;
 453                 }
 454
 455                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 456                     work->response_sz) {
 457                         pr_err("next response offset exceeds response buffer size\n");
 458                         return false;
 459                 }
 460
 461                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 462                 init_chained_smb2_rsp(work);
 463                 return true;
 464         } else if (work->next_smb2_rcv_hdr_off) {
 465                 /*
 466                  * This is last request in chained command,
 467                  * align response to 8 byte
 468                  */
 469                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 470                 len = len - get_rfc1002_len(work->response_buf);
 471                 if (len) {
 472                         ksmbd_debug(SMB, "padding len %u\n", len);
 473                         inc_rfc1001_len(work->response_buf, len);
 474                         if (work->aux_payload_sz)
 475                                 work->aux_payload_sz += len;
 476                 }
 477         }
 478         return false;
 479 }
 480
 481 /**
 482  * init_smb2_rsp_hdr() - initialize smb2 response
 483  * @work:       smb work containing smb request buffer
 484  *
 485  * Return:      0
 486  */
 487 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 488 {
 489         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 490         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 491         struct ksmbd_conn *conn = work->conn;
 492
 493         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 494         *(__be32 *)work->response_buf =
 495                 cpu_to_be32(conn->vals->header_size);
 496         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 497         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 498         rsp_hdr->Command = rcv_hdr->Command;
 499
 500         /*
 501          * Message is response. We don't grant oplock yet.
 502          */
 503         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 504         rsp_hdr->NextCommand = 0;
 505         rsp_hdr->MessageId = rcv_hdr->MessageId;
 506         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 507         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 508         rsp_hdr->SessionId = rcv_hdr->SessionId;
 509         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 510
 511         work->syncronous = true;
 512         if (work->async_id) {
 513                 ksmbd_release_id(&conn->async_ida, work->async_id);
 514                 work->async_id = 0;
 515         }
 516
 517         return 0;
 518 }
 519
 520 /**
 521  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 522  * @work:       smb work containing smb request buffer
 523  *
 524  * Return:      0 on success, otherwise -ENOMEM
 525  */
 526 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 527 {
 528         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 529         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 530         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 531         size_t sz = small_sz;
 532         int cmd = le16_to_cpu(hdr->Command);
 533
 534         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 535                 sz = large_sz;
 536
 537         if (cmd == SMB2_QUERY_INFO_HE) {
 538                 struct smb2_query_info_req *req;
 539
 540                 req = smb2_get_msg(work->request_buf);
 541                 if (req->InfoType == SMB2_O_INFO_FILE &&
 542                     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 543                      req->FileInfoClass == FILE_ALL_INFORMATION))
 544                         sz = large_sz;
 545         }
 546
 547         /* allocate large response buf for chained commands */
 548         if (le32_to_cpu(hdr->NextCommand) > 0)
 549                 sz = large_sz;
 550
 551         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 552         if (!work->response_buf)
 553                 return -ENOMEM;
 554
 555         work->response_sz = sz;
 556         return 0;
 557 }
 558
 559 /**
 560  * smb2_check_user_session() - check for valid session for a user
 561  * @work:       smb work containing smb request buffer
 562  *
 563  * Return:      0 on success, otherwise error
 564  */
 565 int smb2_check_user_session(struct ksmbd_work *work)
 566 {
 567         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
 568         struct ksmbd_conn *conn = work->conn;
 569         unsigned int cmd = conn->ops->get_cmd_val(work);
 570         unsigned long long sess_id;
 571
 572         work->sess = NULL;
 573         /*
 574          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 575          * require a session id, so no need to validate user session's for
 576          * these commands.
 577          */
 578         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 579             cmd == SMB2_SESSION_SETUP_HE)
 580                 return 0;
 581
 582         if (!ksmbd_conn_good(work))
 583                 return -EINVAL;
 584
 585         sess_id = le64_to_cpu(req_hdr->SessionId);
 586         /* Check for validity of user session */
 587         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 588         if (work->sess)
 589                 return 1;
 590         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 591         return -EINVAL;
 592 }
 593
 594 static void destroy_previous_session(struct ksmbd_user *user, u64 id)
 595 {
 596         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 597         struct ksmbd_user *prev_user;
 598
 599         if (!prev_sess)
 600                 return;
 601
 602         prev_user = prev_sess->user;
 603
 604         if (!prev_user ||
 605             strcmp(user->name, prev_user->name) ||
 606             user->passkey_sz != prev_user->passkey_sz ||
 607             memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
 608                 put_session(prev_sess);
 609                 return;
 610         }
 611
 612         put_session(prev_sess);
 613         ksmbd_session_destroy(prev_sess);
 614 }
 615
 616 /**
 617  * smb2_get_name() - get filename string from on the wire smb format
 618  * @src:        source buffer
 619  * @maxlen:     maxlen of source string
 620  * @local_nls:  nls_table pointer
 621  *
 622  * Return:      matching converted filename on success, otherwise error ptr
 623  */
 624 static char *
 625 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 626 {
 627         char *name;
 628
 629         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 630         if (IS_ERR(name)) {
 631                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 632                 return name;
 633         }
 634
 635         ksmbd_conv_path_to_unix(name);
 636         ksmbd_strip_last_slash(name);
 637         return name;
 638 }
 639
 640 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 641 {
 642         struct smb2_hdr *rsp_hdr;
 643         struct ksmbd_conn *conn = work->conn;
 644         int id;
 645
 646         rsp_hdr = smb2_get_msg(work->response_buf);
 647         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 648
 649         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 650         if (id < 0) {
 651                 pr_err("Failed to alloc async message id\n");
 652                 return id;
 653         }
 654         work->syncronous = false;
 655         work->async_id = id;
 656         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 657
 658         ksmbd_debug(SMB,
 659                     "Send interim Response to inform async request id : %d\n",
 660                     work->async_id);
 661
 662         work->cancel_fn = fn;
 663         work->cancel_argv = arg;
 664
 665         if (list_empty(&work->async_request_entry)) {
 666                 spin_lock(&conn->request_lock);
 667                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 668                 spin_unlock(&conn->request_lock);
 669         }
 670
 671         return 0;
 672 }
 673
 674 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 675 {
 676         struct smb2_hdr *rsp_hdr;
 677
 678         rsp_hdr = smb2_get_msg(work->response_buf);
 679         smb2_set_err_rsp(work);
 680         rsp_hdr->Status = status;
 681
 682         work->multiRsp = 1;
 683         ksmbd_conn_write(work);
 684         rsp_hdr->Status = 0;
 685         work->multiRsp = 0;
 686 }
 687
 688 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 689 {
 690         if (S_ISDIR(mode) || S_ISREG(mode))
 691                 return 0;
 692
 693         if (S_ISLNK(mode))
 694                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 695         else if (S_ISFIFO(mode))
 696                 return IO_REPARSE_TAG_LX_FIFO_LE;
 697         else if (S_ISSOCK(mode))
 698                 return IO_REPARSE_TAG_AF_UNIX_LE;
 699         else if (S_ISCHR(mode))
 700                 return IO_REPARSE_TAG_LX_CHR_LE;
 701         else if (S_ISBLK(mode))
 702                 return IO_REPARSE_TAG_LX_BLK_LE;
 703
 704         return 0;
 705 }
 706
 707 /**
 708  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 709  * @stat:       kstat containing file mode
 710  * @attribute:  attribute flags
 711  *
 712  * Return:      converted dos mode
 713  */
 714 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 715 {
 716         int attr = 0;
 717
 718         if (S_ISDIR(stat->mode)) {
 719                 attr = FILE_ATTRIBUTE_DIRECTORY |
 720                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 721         } else {
 722                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 723                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 724                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 725                                 FILE_SUPPORTS_SPARSE_FILES))
 726                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 727
 728                 if (smb2_get_reparse_tag_special_file(stat->mode))
 729                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 730         }
 731
 732         return attr;
 733 }
 734
 735 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 736                                __le16 hash_id)
 737 {
 738         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 739         pneg_ctxt->DataLength = cpu_to_le16(38);
 740         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 741         pneg_ctxt->Reserved = cpu_to_le32(0);
 742         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 743         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 744         pneg_ctxt->HashAlgorithms = hash_id;
 745 }
 746
 747 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 748                                __le16 cipher_type)
 749 {
 750         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 751         pneg_ctxt->DataLength = cpu_to_le16(4);
 752         pneg_ctxt->Reserved = cpu_to_le32(0);
 753         pneg_ctxt->CipherCount = cpu_to_le16(1);
 754         pneg_ctxt->Ciphers[0] = cipher_type;
 755 }
 756
 757 static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
 758                                    __le16 comp_algo)
 759 {
 760         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 761         pneg_ctxt->DataLength =
 762                 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
 763                         - sizeof(struct smb2_neg_context));
 764         pneg_ctxt->Reserved = cpu_to_le32(0);
 765         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 766         pneg_ctxt->Flags = cpu_to_le32(0);
 767         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 768 }
 769
 770 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 771                                 __le16 sign_algo)
 772 {
 773         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 774         pneg_ctxt->DataLength =
 775                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 776                         - sizeof(struct smb2_neg_context));
 777         pneg_ctxt->Reserved = cpu_to_le32(0);
 778         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 779         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 780 }
 781
 782 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 783 {
 784         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 785         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 786         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 787         pneg_ctxt->Name[0] = 0x93;
 788         pneg_ctxt->Name[1] = 0xAD;
 789         pneg_ctxt->Name[2] = 0x25;
 790         pneg_ctxt->Name[3] = 0x50;
 791         pneg_ctxt->Name[4] = 0x9C;
 792         pneg_ctxt->Name[5] = 0xB4;
 793         pneg_ctxt->Name[6] = 0x11;
 794         pneg_ctxt->Name[7] = 0xE7;
 795         pneg_ctxt->Name[8] = 0xB4;
 796         pneg_ctxt->Name[9] = 0x23;
 797         pneg_ctxt->Name[10] = 0x83;
 798         pneg_ctxt->Name[11] = 0xDE;
 799         pneg_ctxt->Name[12] = 0x96;
 800         pneg_ctxt->Name[13] = 0x8B;
 801         pneg_ctxt->Name[14] = 0xCD;
 802         pneg_ctxt->Name[15] = 0x7C;
 803 }
 804
 805 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 806                                   struct smb2_negotiate_rsp *rsp,
 807                                   void *smb2_buf_len)
 808 {
 809         char *pneg_ctxt = (char *)rsp +
 810                         le32_to_cpu(rsp->NegotiateContextOffset);
 811         int neg_ctxt_cnt = 1;
 812         int ctxt_size;
 813
 814         ksmbd_debug(SMB,
 815                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 816         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 817                            conn->preauth_info->Preauth_HashId);
 818         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 819         inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
 820         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 821         /* Round to 8 byte boundary */
 822         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 823
 824         if (conn->cipher_type) {
 825                 ctxt_size = round_up(ctxt_size, 8);
 826                 ksmbd_debug(SMB,
 827                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 828                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 829                                    conn->cipher_type);
 830                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 831                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 832                 /* Round to 8 byte boundary */
 833                 pneg_ctxt +=
 834                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 835                                  8);
 836         }
 837
 838         if (conn->compress_algorithm) {
 839                 ctxt_size = round_up(ctxt_size, 8);
 840                 ksmbd_debug(SMB,
 841                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 842                 /* Temporarily set to SMB3_COMPRESS_NONE */
 843                 build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
 844                                        conn->compress_algorithm);
 845                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 846                 ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
 847                 /* Round to 8 byte boundary */
 848                 pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
 849                                       8);
 850         }
 851
 852         if (conn->posix_ext_supported) {
 853                 ctxt_size = round_up(ctxt_size, 8);
 854                 ksmbd_debug(SMB,
 855                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 856                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 857                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 858                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 859                 /* Round to 8 byte boundary */
 860                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 861         }
 862
 863         if (conn->signing_negotiated) {
 864                 ctxt_size = round_up(ctxt_size, 8);
 865                 ksmbd_debug(SMB,
 866                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 867                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 868                                     conn->signing_algorithm);
 869                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 870                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 871         }
 872
 873         inc_rfc1001_len(smb2_buf_len, ctxt_size);
 874 }
 875
 876 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 877                                   struct smb2_preauth_neg_context *pneg_ctxt)
 878 {
 879         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 880
 881         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 882                 conn->preauth_info->Preauth_HashId =
 883                         SMB2_PREAUTH_INTEGRITY_SHA512;
 884                 err = STATUS_SUCCESS;
 885         }
 886
 887         return err;
 888 }
 889
 890 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 891                                 struct smb2_encryption_neg_context *pneg_ctxt,
 892                                 int len_of_ctxts)
 893 {
 894         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 895         int i, cphs_size = cph_cnt * sizeof(__le16);
 896
 897         conn->cipher_type = 0;
 898
 899         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 900             len_of_ctxts) {
 901                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 902                 return;
 903         }
 904
 905         if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
 906                 return;
 907
 908         for (i = 0; i < cph_cnt; i++) {
 909                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 910                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 911                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 912                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 913                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 914                                     pneg_ctxt->Ciphers[i]);
 915                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 916                         break;
 917                 }
 918         }
 919 }
 920
 921 /**
 922  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 923  * @conn:       smb connection
 924  *
 925  * Return:      true if connection should be encrypted, else false
 926  */
 927 static bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 928 {
 929         if (!conn->ops->generate_encryptionkey)
 930                 return false;
 931
 932         /*
 933          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 934          * SMB 3.1.1 uses the cipher_type field.
 935          */
 936         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 937             conn->cipher_type;
 938 }
 939
 940 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 941                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 942 {
 943         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 944 }
 945
 946 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 947                                  struct smb2_signing_capabilities *pneg_ctxt,
 948                                  int len_of_ctxts)
 949 {
 950         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 951         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 952
 953         conn->signing_negotiated = false;
 954
 955         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 956             len_of_ctxts) {
 957                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 958                 return;
 959         }
 960
 961         for (i = 0; i < sign_algo_cnt; i++) {
 962                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 963                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 964                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 965                                     pneg_ctxt->SigningAlgorithms[i]);
 966                         conn->signing_negotiated = true;
 967                         conn->signing_algorithm =
 968                                 pneg_ctxt->SigningAlgorithms[i];
 969                         break;
 970                 }
 971         }
 972 }
 973
 974 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 975                                       struct smb2_negotiate_req *req,
 976                                       int len_of_smb)
 977 {
 978         /* +4 is to account for the RFC1001 len field */
 979         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
 980         int i = 0, len_of_ctxts;
 981         int offset = le32_to_cpu(req->NegotiateContextOffset);
 982         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 983         __le32 status = STATUS_INVALID_PARAMETER;
 984
 985         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 986         if (len_of_smb <= offset) {
 987                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 988                 return status;
 989         }
 990
 991         len_of_ctxts = len_of_smb - offset;
 992
 993         while (i++ < neg_ctxt_cnt) {
 994                 int clen;
 995
 996                 /* check that offset is not beyond end of SMB */
 997                 if (len_of_ctxts == 0)
 998                         break;
 999
1000                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
1001                         break;
1002
1003                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1004                 clen = le16_to_cpu(pctx->DataLength);
1005                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1006                         break;
1007
1008                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1009                         ksmbd_debug(SMB,
1010                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1011                         if (conn->preauth_info->Preauth_HashId)
1012                                 break;
1013
1014                         status = decode_preauth_ctxt(conn,
1015                                                      (struct smb2_preauth_neg_context *)pctx);
1016                         if (status != STATUS_SUCCESS)
1017                                 break;
1018                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1019                         ksmbd_debug(SMB,
1020                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1021                         if (conn->cipher_type)
1022                                 break;
1023
1024                         decode_encrypt_ctxt(conn,
1025                                             (struct smb2_encryption_neg_context *)pctx,
1026                                             len_of_ctxts);
1027                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1028                         ksmbd_debug(SMB,
1029                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1030                         if (conn->compress_algorithm)
1031                                 break;
1032
1033                         decode_compress_ctxt(conn,
1034                                              (struct smb2_compression_capabilities_context *)pctx);
1035                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1036                         ksmbd_debug(SMB,
1037                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1038                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1041                         conn->posix_ext_supported = true;
1042                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1043                         ksmbd_debug(SMB,
1044                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1045                         decode_sign_cap_ctxt(conn,
1046                                              (struct smb2_signing_capabilities *)pctx,
1047                                              len_of_ctxts);
1048                 }
1049
1050                 /* offsets must be 8 byte aligned */
1051                 clen = (clen + 7) & ~0x7;
1052                 offset = clen + sizeof(struct smb2_neg_context);
1053                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1054         }
1055         return status;
1056 }
1057
1058 /**
1059  * smb2_handle_negotiate() - handler for smb2 negotiate command
1060  * @work:       smb work containing smb request buffer
1061  *
1062  * Return:      0
1063  */
1064 int smb2_handle_negotiate(struct ksmbd_work *work)
1065 {
1066         struct ksmbd_conn *conn = work->conn;
1067         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1068         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1069         int rc = 0;
1070         unsigned int smb2_buf_len, smb2_neg_size;
1071         __le32 status;
1072
1073         ksmbd_debug(SMB, "Received negotiate request\n");
1074         conn->need_neg = false;
1075         if (ksmbd_conn_good(work)) {
1076                 pr_err("conn->tcp_status is already in CifsGood State\n");
1077                 work->send_no_response = 1;
1078                 return rc;
1079         }
1080
1081         if (req->DialectCount == 0) {
1082                 pr_err("malformed packet\n");
1083                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1084                 rc = -EINVAL;
1085                 goto err_out;
1086         }
1087
1088         smb2_buf_len = get_rfc1002_len(work->request_buf);
1089         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1090         if (smb2_neg_size > smb2_buf_len) {
1091                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1092                 rc = -EINVAL;
1093                 goto err_out;
1094         }
1095
1096         if (conn->dialect == SMB311_PROT_ID) {
1097                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1098
1099                 if (smb2_buf_len < nego_ctxt_off) {
1100                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1101                         rc = -EINVAL;
1102                         goto err_out;
1103                 }
1104
1105                 if (smb2_neg_size > nego_ctxt_off) {
1106                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1107                         rc = -EINVAL;
1108                         goto err_out;
1109                 }
1110
1111                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1112                     nego_ctxt_off) {
1113                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1114                         rc = -EINVAL;
1115                         goto err_out;
1116                 }
1117         } else {
1118                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1119                     smb2_buf_len) {
1120                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1121                         rc = -EINVAL;
1122                         goto err_out;
1123                 }
1124         }
1125
1126         conn->cli_cap = le32_to_cpu(req->Capabilities);
1127         switch (conn->dialect) {
1128         case SMB311_PROT_ID:
1129                 conn->preauth_info =
1130                         kzalloc(sizeof(struct preauth_integrity_info),
1131                                 GFP_KERNEL);
1132                 if (!conn->preauth_info) {
1133                         rc = -ENOMEM;
1134                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1135                         goto err_out;
1136                 }
1137
1138                 status = deassemble_neg_contexts(conn, req,
1139                                                  get_rfc1002_len(work->request_buf));
1140                 if (status != STATUS_SUCCESS) {
1141                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1142                                status);
1143                         rsp->hdr.Status = status;
1144                         rc = -EINVAL;
1145                         goto err_out;
1146                 }
1147
1148                 rc = init_smb3_11_server(conn);
1149                 if (rc < 0) {
1150                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1151                         goto err_out;
1152                 }
1153
1154                 ksmbd_gen_preauth_integrity_hash(conn,
1155                                                  work->request_buf,
1156                                                  conn->preauth_info->Preauth_HashValue);
1157                 rsp->NegotiateContextOffset =
1158                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1159                 assemble_neg_contexts(conn, rsp, work->response_buf);
1160                 break;
1161         case SMB302_PROT_ID:
1162                 init_smb3_02_server(conn);
1163                 break;
1164         case SMB30_PROT_ID:
1165                 init_smb3_0_server(conn);
1166                 break;
1167         case SMB21_PROT_ID:
1168                 init_smb2_1_server(conn);
1169                 break;
1170         case SMB2X_PROT_ID:
1171         case BAD_PROT_ID:
1172         default:
1173                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1174                             conn->dialect);
1175                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1176                 rc = -EINVAL;
1177                 goto err_out;
1178         }
1179         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1180
1181         /* For stats */
1182         conn->connection_type = conn->dialect;
1183
1184         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1185         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1186         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1187
1188         memcpy(conn->ClientGUID, req->ClientGUID,
1189                         SMB2_CLIENT_GUID_SIZE);
1190         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1191
1192         rsp->StructureSize = cpu_to_le16(65);
1193         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1194         /* Not setting conn guid rsp->ServerGUID, as it
1195          * not used by client for identifying server
1196          */
1197         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1198
1199         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1200         rsp->ServerStartTime = 0;
1201         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1202                     le32_to_cpu(rsp->NegotiateContextOffset),
1203                     le16_to_cpu(rsp->NegotiateContextCount));
1204
1205         rsp->SecurityBufferOffset = cpu_to_le16(128);
1206         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1207         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1208                                   le16_to_cpu(rsp->SecurityBufferOffset));
1209         inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
1210                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1211                          AUTH_GSS_LENGTH);
1212         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1213         conn->use_spnego = true;
1214
1215         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1216              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1217             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1218                 conn->sign = true;
1219         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1220                 server_conf.enforced_signing = true;
1221                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1222                 conn->sign = true;
1223         }
1224
1225         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1226         ksmbd_conn_set_need_negotiate(work);
1227
1228 err_out:
1229         if (rc < 0)
1230                 smb2_set_err_rsp(work);
1231
1232         return rc;
1233 }
1234
1235 static int alloc_preauth_hash(struct ksmbd_session *sess,
1236                               struct ksmbd_conn *conn)
1237 {
1238         if (sess->Preauth_HashValue)
1239                 return 0;
1240
1241         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1242                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1243         if (!sess->Preauth_HashValue)
1244                 return -ENOMEM;
1245
1246         return 0;
1247 }
1248
1249 static int generate_preauth_hash(struct ksmbd_work *work)
1250 {
1251         struct ksmbd_conn *conn = work->conn;
1252         struct ksmbd_session *sess = work->sess;
1253         u8 *preauth_hash;
1254
1255         if (conn->dialect != SMB311_PROT_ID)
1256                 return 0;
1257
1258         if (conn->binding) {
1259                 struct preauth_session *preauth_sess;
1260
1261                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1262                 if (!preauth_sess) {
1263                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1264                         if (!preauth_sess)
1265                                 return -ENOMEM;
1266                 }
1267
1268                 preauth_hash = preauth_sess->Preauth_HashValue;
1269         } else {
1270                 if (!sess->Preauth_HashValue)
1271                         if (alloc_preauth_hash(sess, conn))
1272                                 return -ENOMEM;
1273                 preauth_hash = sess->Preauth_HashValue;
1274         }
1275
1276         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1277         return 0;
1278 }
1279
1280 static int decode_negotiation_token(struct ksmbd_conn *conn,
1281                                     struct negotiate_message *negblob,
1282                                     size_t sz)
1283 {
1284         if (!conn->use_spnego)
1285                 return -EINVAL;
1286
1287         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1288                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1289                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1290                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1291                         conn->use_spnego = false;
1292                 }
1293         }
1294         return 0;
1295 }
1296
1297 static int ntlm_negotiate(struct ksmbd_work *work,
1298                           struct negotiate_message *negblob,
1299                           size_t negblob_len)
1300 {
1301         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1302         struct challenge_message *chgblob;
1303         unsigned char *spnego_blob = NULL;
1304         u16 spnego_blob_len;
1305         char *neg_blob;
1306         int sz, rc;
1307
1308         ksmbd_debug(SMB, "negotiate phase\n");
1309         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1310         if (rc)
1311                 return rc;
1312
1313         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1314         chgblob =
1315                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1316         memset(chgblob, 0, sizeof(struct challenge_message));
1317
1318         if (!work->conn->use_spnego) {
1319                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1320                 if (sz < 0)
1321                         return -ENOMEM;
1322
1323                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1324                 return 0;
1325         }
1326
1327         sz = sizeof(struct challenge_message);
1328         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1329
1330         neg_blob = kzalloc(sz, GFP_KERNEL);
1331         if (!neg_blob)
1332                 return -ENOMEM;
1333
1334         chgblob = (struct challenge_message *)neg_blob;
1335         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1336         if (sz < 0) {
1337                 rc = -ENOMEM;
1338                 goto out;
1339         }
1340
1341         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1342                                            neg_blob, sz);
1343         if (rc) {
1344                 rc = -ENOMEM;
1345                 goto out;
1346         }
1347
1348         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1349         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1350         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1351
1352 out:
1353         kfree(spnego_blob);
1354         kfree(neg_blob);
1355         return rc;
1356 }
1357
1358 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1359                                                   struct smb2_sess_setup_req *req)
1360 {
1361         int sz;
1362
1363         if (conn->use_spnego && conn->mechToken)
1364                 return (struct authenticate_message *)conn->mechToken;
1365
1366         sz = le16_to_cpu(req->SecurityBufferOffset);
1367         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1368                                                + sz);
1369 }
1370
1371 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1372                                        struct smb2_sess_setup_req *req)
1373 {
1374         struct authenticate_message *authblob;
1375         struct ksmbd_user *user;
1376         char *name;
1377         unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1378
1379         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1380         if (secbuf_len < sizeof(struct authenticate_message)) {
1381                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1382                 return NULL;
1383         }
1384         authblob = user_authblob(conn, req);
1385         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1386         name_len = le16_to_cpu(authblob->UserName.Length);
1387         auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1388
1389         if (auth_msg_len < (u64)name_off + name_len)
1390                 return NULL;
1391
1392         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1393                                       name_len,
1394                                       true,
1395                                       conn->local_nls);
1396         if (IS_ERR(name)) {
1397                 pr_err("cannot allocate memory\n");
1398                 return NULL;
1399         }
1400
1401         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1402         user = ksmbd_login_user(name);
1403         kfree(name);
1404         return user;
1405 }
1406
1407 static int ntlm_authenticate(struct ksmbd_work *work)
1408 {
1409         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1410         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1411         struct ksmbd_conn *conn = work->conn;
1412         struct ksmbd_session *sess = work->sess;
1413         struct channel *chann = NULL;
1414         struct ksmbd_user *user;
1415         u64 prev_id;
1416         int sz, rc;
1417
1418         ksmbd_debug(SMB, "authenticate phase\n");
1419         if (conn->use_spnego) {
1420                 unsigned char *spnego_blob;
1421                 u16 spnego_blob_len;
1422
1423                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1424                                                     &spnego_blob_len,
1425                                                     0);
1426                 if (rc)
1427                         return -ENOMEM;
1428
1429                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1430                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1431                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1432                 kfree(spnego_blob);
1433                 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
1434         }
1435
1436         user = session_user(conn, req);
1437         if (!user) {
1438                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1439                 return -EPERM;
1440         }
1441
1442         /* Check for previous session */
1443         prev_id = le64_to_cpu(req->PreviousSessionId);
1444         if (prev_id && prev_id != sess->id)
1445                 destroy_previous_session(user, prev_id);
1446
1447         if (sess->state == SMB2_SESSION_VALID) {
1448                 /*
1449                  * Reuse session if anonymous try to connect
1450                  * on reauthetication.
1451                  */
1452                 if (ksmbd_anonymous_user(user)) {
1453                         ksmbd_free_user(user);
1454                         return 0;
1455                 }
1456
1457                 if (!ksmbd_compare_user(sess->user, user)) {
1458                         ksmbd_free_user(user);
1459                         return -EPERM;
1460                 }
1461                 ksmbd_free_user(user);
1462         } else {
1463                 sess->user = user;
1464         }
1465
1466         if (user_guest(sess->user)) {
1467                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1468         } else {
1469                 struct authenticate_message *authblob;
1470
1471                 authblob = user_authblob(conn, req);
1472                 sz = le16_to_cpu(req->SecurityBufferLength);
1473                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1474                 if (rc) {
1475                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1476                         ksmbd_debug(SMB, "authentication failed\n");
1477                         return -EPERM;
1478                 }
1479         }
1480
1481         /*
1482          * If session state is SMB2_SESSION_VALID, We can assume
1483          * that it is reauthentication. And the user/password
1484          * has been verified, so return it here.
1485          */
1486         if (sess->state == SMB2_SESSION_VALID) {
1487                 if (conn->binding)
1488                         goto binding_session;
1489                 return 0;
1490         }
1491
1492         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1493              (conn->sign || server_conf.enforced_signing)) ||
1494             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1495                 sess->sign = true;
1496
1497         if (smb3_encryption_negotiated(conn) &&
1498                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1499                 rc = conn->ops->generate_encryptionkey(sess);
1500                 if (rc) {
1501                         ksmbd_debug(SMB,
1502                                         "SMB3 encryption key generation failed\n");
1503                         return -EINVAL;
1504                 }
1505                 sess->enc = true;
1506                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1507                 /*
1508                  * signing is disable if encryption is enable
1509                  * on this session
1510                  */
1511                 sess->sign = false;
1512         }
1513
1514 binding_session:
1515         if (conn->dialect >= SMB30_PROT_ID) {
1516                 chann = lookup_chann_list(sess, conn);
1517                 if (!chann) {
1518                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1519                         if (!chann)
1520                                 return -ENOMEM;
1521
1522                         chann->conn = conn;
1523                         INIT_LIST_HEAD(&chann->chann_list);
1524                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1525                 }
1526         }
1527
1528         if (conn->ops->generate_signingkey) {
1529                 rc = conn->ops->generate_signingkey(sess, conn);
1530                 if (rc) {
1531                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1532                         return -EINVAL;
1533                 }
1534         }
1535
1536         if (!ksmbd_conn_lookup_dialect(conn)) {
1537                 pr_err("fail to verify the dialect\n");
1538                 return -ENOENT;
1539         }
1540         return 0;
1541 }
1542
1543 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1544 static int krb5_authenticate(struct ksmbd_work *work)
1545 {
1546         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1547         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1548         struct ksmbd_conn *conn = work->conn;
1549         struct ksmbd_session *sess = work->sess;
1550         char *in_blob, *out_blob;
1551         struct channel *chann = NULL;
1552         u64 prev_sess_id;
1553         int in_len, out_len;
1554         int retval;
1555
1556         in_blob = (char *)&req->hdr.ProtocolId +
1557                 le16_to_cpu(req->SecurityBufferOffset);
1558         in_len = le16_to_cpu(req->SecurityBufferLength);
1559         out_blob = (char *)&rsp->hdr.ProtocolId +
1560                 le16_to_cpu(rsp->SecurityBufferOffset);
1561         out_len = work->response_sz -
1562                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1563
1564         /* Check previous session */
1565         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1566         if (prev_sess_id && prev_sess_id != sess->id)
1567                 destroy_previous_session(sess->user, prev_sess_id);
1568
1569         if (sess->state == SMB2_SESSION_VALID)
1570                 ksmbd_free_user(sess->user);
1571
1572         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1573                                          out_blob, &out_len);
1574         if (retval) {
1575                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1576                 return -EINVAL;
1577         }
1578         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1579         inc_rfc1001_len(work->response_buf, out_len - 1);
1580
1581         if ((conn->sign || server_conf.enforced_signing) ||
1582             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1583                 sess->sign = true;
1584
1585         if (smb3_encryption_negotiated(conn)) {
1586                 retval = conn->ops->generate_encryptionkey(sess);
1587                 if (retval) {
1588                         ksmbd_debug(SMB,
1589                                     "SMB3 encryption key generation failed\n");
1590                         return -EINVAL;
1591                 }
1592                 sess->enc = true;
1593                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1594                 sess->sign = false;
1595         }
1596
1597         if (conn->dialect >= SMB30_PROT_ID) {
1598                 chann = lookup_chann_list(sess, conn);
1599                 if (!chann) {
1600                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1601                         if (!chann)
1602                                 return -ENOMEM;
1603
1604                         chann->conn = conn;
1605                         INIT_LIST_HEAD(&chann->chann_list);
1606                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1607                 }
1608         }
1609
1610         if (conn->ops->generate_signingkey) {
1611                 retval = conn->ops->generate_signingkey(sess, conn);
1612                 if (retval) {
1613                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1614                         return -EINVAL;
1615                 }
1616         }
1617
1618         if (!ksmbd_conn_lookup_dialect(conn)) {
1619                 pr_err("fail to verify the dialect\n");
1620                 return -ENOENT;
1621         }
1622         return 0;
1623 }
1624 #else
1625 static int krb5_authenticate(struct ksmbd_work *work)
1626 {
1627         return -EOPNOTSUPP;
1628 }
1629 #endif
1630
1631 int smb2_sess_setup(struct ksmbd_work *work)
1632 {
1633         struct ksmbd_conn *conn = work->conn;
1634         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1635         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1636         struct ksmbd_session *sess;
1637         struct negotiate_message *negblob;
1638         unsigned int negblob_len, negblob_off;
1639         int rc = 0;
1640
1641         ksmbd_debug(SMB, "Received request for session setup\n");
1642
1643         rsp->StructureSize = cpu_to_le16(9);
1644         rsp->SessionFlags = 0;
1645         rsp->SecurityBufferOffset = cpu_to_le16(72);
1646         rsp->SecurityBufferLength = 0;
1647         inc_rfc1001_len(work->response_buf, 9);
1648
1649         if (!req->hdr.SessionId) {
1650                 sess = ksmbd_smb2_session_create();
1651                 if (!sess) {
1652                         rc = -ENOMEM;
1653                         goto out_err;
1654                 }
1655                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1656                 ksmbd_session_register(conn, sess);
1657         } else if (conn->dialect >= SMB30_PROT_ID &&
1658                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1659                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1660                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1661
1662                 sess = ksmbd_session_lookup_slowpath(sess_id);
1663                 if (!sess) {
1664                         rc = -ENOENT;
1665                         goto out_err;
1666                 }
1667
1668                 if (conn->dialect != sess->conn->dialect) {
1669                         rc = -EINVAL;
1670                         goto out_err;
1671                 }
1672
1673                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1674                         rc = -EINVAL;
1675                         goto out_err;
1676                 }
1677
1678                 if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
1679                             SMB2_CLIENT_GUID_SIZE)) {
1680                         rc = -ENOENT;
1681                         goto out_err;
1682                 }
1683
1684                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1685                         rc = -EACCES;
1686                         goto out_err;
1687                 }
1688
1689                 if (sess->state == SMB2_SESSION_EXPIRED) {
1690                         rc = -EFAULT;
1691                         goto out_err;
1692                 }
1693
1694                 if (ksmbd_session_lookup(conn, sess_id)) {
1695                         rc = -EACCES;
1696                         goto out_err;
1697                 }
1698
1699                 conn->binding = true;
1700         } else if ((conn->dialect < SMB30_PROT_ID ||
1701                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1702                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1703                 sess = NULL;
1704                 rc = -EACCES;
1705                 goto out_err;
1706         } else {
1707                 sess = ksmbd_session_lookup(conn,
1708                                             le64_to_cpu(req->hdr.SessionId));
1709                 if (!sess) {
1710                         rc = -ENOENT;
1711                         goto out_err;
1712                 }
1713         }
1714         work->sess = sess;
1715
1716         if (sess->state == SMB2_SESSION_EXPIRED)
1717                 sess->state = SMB2_SESSION_IN_PROGRESS;
1718
1719         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1720         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1721         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1722             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1723                 rc = -EINVAL;
1724                 goto out_err;
1725         }
1726
1727         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1728                         negblob_off);
1729
1730         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1731                 if (conn->mechToken)
1732                         negblob = (struct negotiate_message *)conn->mechToken;
1733         }
1734
1735         if (server_conf.auth_mechs & conn->auth_mechs) {
1736                 rc = generate_preauth_hash(work);
1737                 if (rc)
1738                         goto out_err;
1739
1740                 if (conn->preferred_auth_mech &
1741                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1742                         rc = krb5_authenticate(work);
1743                         if (rc) {
1744                                 rc = -EINVAL;
1745                                 goto out_err;
1746                         }
1747
1748                         ksmbd_conn_set_good(work);
1749                         sess->state = SMB2_SESSION_VALID;
1750                         kfree(sess->Preauth_HashValue);
1751                         sess->Preauth_HashValue = NULL;
1752                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1753                         if (negblob->MessageType == NtLmNegotiate) {
1754                                 rc = ntlm_negotiate(work, negblob, negblob_len);
1755                                 if (rc)
1756                                         goto out_err;
1757                                 rsp->hdr.Status =
1758                                         STATUS_MORE_PROCESSING_REQUIRED;
1759                                 /*
1760                                  * Note: here total size -1 is done as an
1761                                  * adjustment for 0 size blob
1762                                  */
1763                                 inc_rfc1001_len(work->response_buf,
1764                                                 le16_to_cpu(rsp->SecurityBufferLength) - 1);
1765
1766                         } else if (negblob->MessageType == NtLmAuthenticate) {
1767                                 rc = ntlm_authenticate(work);
1768                                 if (rc)
1769                                         goto out_err;
1770
1771                                 ksmbd_conn_set_good(work);
1772                                 sess->state = SMB2_SESSION_VALID;
1773                                 if (conn->binding) {
1774                                         struct preauth_session *preauth_sess;
1775
1776                                         preauth_sess =
1777                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1778                                         if (preauth_sess) {
1779                                                 list_del(&preauth_sess->preauth_entry);
1780                                                 kfree(preauth_sess);
1781                                         }
1782                                 }
1783                                 kfree(sess->Preauth_HashValue);
1784                                 sess->Preauth_HashValue = NULL;
1785                         }
1786                 } else {
1787                         /* TODO: need one more negotiation */
1788                         pr_err("Not support the preferred authentication\n");
1789                         rc = -EINVAL;
1790                 }
1791         } else {
1792                 pr_err("Not support authentication\n");
1793                 rc = -EINVAL;
1794         }
1795
1796 out_err:
1797         if (rc == -EINVAL)
1798                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1799         else if (rc == -ENOENT)
1800                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1801         else if (rc == -EACCES)
1802                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1803         else if (rc == -EFAULT)
1804                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1805         else if (rc == -ENOMEM)
1806                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1807         else if (rc)
1808                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1809
1810         if (conn->use_spnego && conn->mechToken) {
1811                 kfree(conn->mechToken);
1812                 conn->mechToken = NULL;
1813         }
1814
1815         if (rc < 0) {
1816                 /*
1817                  * SecurityBufferOffset should be set to zero
1818                  * in session setup error response.
1819                  */
1820                 rsp->SecurityBufferOffset = 0;
1821
1822                 if (sess) {
1823                         bool try_delay = false;
1824
1825                         /*
1826                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1827                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1828                          * failure to make it harder to send enough random connection requests
1829                          * to break into a server.
1830                          */
1831                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1832                                 try_delay = true;
1833
1834                         ksmbd_session_destroy(sess);
1835                         work->sess = NULL;
1836                         if (try_delay)
1837                                 ssleep(5);
1838                 }
1839         }
1840
1841         return rc;
1842 }
1843
1844 /**
1845  * smb2_tree_connect() - handler for smb2 tree connect command
1846  * @work:       smb work containing smb request buffer
1847  *
1848  * Return:      0 on success, otherwise error
1849  */
1850 int smb2_tree_connect(struct ksmbd_work *work)
1851 {
1852         struct ksmbd_conn *conn = work->conn;
1853         struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
1854         struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
1855         struct ksmbd_session *sess = work->sess;
1856         char *treename = NULL, *name = NULL;
1857         struct ksmbd_tree_conn_status status;
1858         struct ksmbd_share_config *share;
1859         int rc = -EINVAL;
1860
1861         treename = smb_strndup_from_utf16(req->Buffer,
1862                                           le16_to_cpu(req->PathLength), true,
1863                                           conn->local_nls);
1864         if (IS_ERR(treename)) {
1865                 pr_err("treename is NULL\n");
1866                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1867                 goto out_err1;
1868         }
1869
1870         name = ksmbd_extract_sharename(treename);
1871         if (IS_ERR(name)) {
1872                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1873                 goto out_err1;
1874         }
1875
1876         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1877                     name, treename);
1878
1879         status = ksmbd_tree_conn_connect(sess, name);
1880         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1881                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1882         else
1883                 goto out_err1;
1884
1885         share = status.tree_conn->share_conf;
1886         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1887                 ksmbd_debug(SMB, "IPC share path request\n");
1888                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1889                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1890                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1891                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1892                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1893                         FILE_SYNCHRONIZE_LE;
1894         } else {
1895                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1896                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1897                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1898                 if (test_tree_conn_flag(status.tree_conn,
1899                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1900                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1901                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1902                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1903                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1904                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1905                                 FILE_SYNCHRONIZE_LE;
1906                 }
1907         }
1908
1909         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1910         if (conn->posix_ext_supported)
1911                 status.tree_conn->posix_extensions = true;
1912
1913 out_err1:
1914         rsp->StructureSize = cpu_to_le16(16);
1915         rsp->Capabilities = 0;
1916         rsp->Reserved = 0;
1917         /* default manual caching */
1918         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1919         inc_rfc1001_len(work->response_buf, 16);
1920
1921         if (!IS_ERR(treename))
1922                 kfree(treename);
1923         if (!IS_ERR(name))
1924                 kfree(name);
1925
1926         switch (status.ret) {
1927         case KSMBD_TREE_CONN_STATUS_OK:
1928                 rsp->hdr.Status = STATUS_SUCCESS;
1929                 rc = 0;
1930                 break;
1931         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1932                 rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
1933                 break;
1934         case -ENOMEM:
1935         case KSMBD_TREE_CONN_STATUS_NOMEM:
1936                 rsp->hdr.Status = STATUS_NO_MEMORY;
1937                 break;
1938         case KSMBD_TREE_CONN_STATUS_ERROR:
1939         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1940         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1941                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1942                 break;
1943         case -EINVAL:
1944                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1945                 break;
1946         default:
1947                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1948         }
1949
1950         return rc;
1951 }
1952
1953 /**
1954  * smb2_create_open_flags() - convert smb open flags to unix open flags
1955  * @file_present:       is file already present
1956  * @access:             file access flags
1957  * @disposition:        file disposition flags
1958  * @may_flags:          set with MAY_ flags
1959  *
1960  * Return:      file open flags
1961  */
1962 static int smb2_create_open_flags(bool file_present, __le32 access,
1963                                   __le32 disposition,
1964                                   int *may_flags)
1965 {
1966         int oflags = O_NONBLOCK | O_LARGEFILE;
1967
1968         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1969             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1970                 oflags |= O_RDWR;
1971                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1972         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1973                 oflags |= O_WRONLY;
1974                 *may_flags = MAY_OPEN | MAY_WRITE;
1975         } else {
1976                 oflags |= O_RDONLY;
1977                 *may_flags = MAY_OPEN | MAY_READ;
1978         }
1979
1980         if (access == FILE_READ_ATTRIBUTES_LE)
1981                 oflags |= O_PATH;
1982
1983         if (file_present) {
1984                 switch (disposition & FILE_CREATE_MASK_LE) {
1985                 case FILE_OPEN_LE:
1986                 case FILE_CREATE_LE:
1987                         break;
1988                 case FILE_SUPERSEDE_LE:
1989                 case FILE_OVERWRITE_LE:
1990                 case FILE_OVERWRITE_IF_LE:
1991                         oflags |= O_TRUNC;
1992                         break;
1993                 default:
1994                         break;
1995                 }
1996         } else {
1997                 switch (disposition & FILE_CREATE_MASK_LE) {
1998                 case FILE_SUPERSEDE_LE:
1999                 case FILE_CREATE_LE:
2000                 case FILE_OPEN_IF_LE:
2001                 case FILE_OVERWRITE_IF_LE:
2002                         oflags |= O_CREAT;
2003                         break;
2004                 case FILE_OPEN_LE:
2005                 case FILE_OVERWRITE_LE:
2006                         oflags &= ~O_CREAT;
2007                         break;
2008                 default:
2009                         break;
2010                 }
2011         }
2012
2013         return oflags;
2014 }
2015
2016 /**
2017  * smb2_tree_disconnect() - handler for smb tree connect request
2018  * @work:       smb work containing request buffer
2019  *
2020  * Return:      0
2021  */
2022 int smb2_tree_disconnect(struct ksmbd_work *work)
2023 {
2024         struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
2025         struct ksmbd_session *sess = work->sess;
2026         struct ksmbd_tree_connect *tcon = work->tcon;
2027
2028         rsp->StructureSize = cpu_to_le16(4);
2029         inc_rfc1001_len(work->response_buf, 4);
2030
2031         ksmbd_debug(SMB, "request\n");
2032
2033         if (!tcon) {
2034                 struct smb2_tree_disconnect_req *req =
2035                         smb2_get_msg(work->request_buf);
2036
2037                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2038                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2039                 smb2_set_err_rsp(work);
2040                 return 0;
2041         }
2042
2043         ksmbd_close_tree_conn_fds(work);
2044         ksmbd_tree_conn_disconnect(sess, tcon);
2045         return 0;
2046 }
2047
2048 /**
2049  * smb2_session_logoff() - handler for session log off request
2050  * @work:       smb work containing request buffer
2051  *
2052  * Return:      0
2053  */
2054 int smb2_session_logoff(struct ksmbd_work *work)
2055 {
2056         struct ksmbd_conn *conn = work->conn;
2057         struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
2058         struct ksmbd_session *sess = work->sess;
2059
2060         rsp->StructureSize = cpu_to_le16(4);
2061         inc_rfc1001_len(work->response_buf, 4);
2062
2063         ksmbd_debug(SMB, "request\n");
2064
2065         /* setting CifsExiting here may race with start_tcp_sess */
2066         ksmbd_conn_set_need_reconnect(work);
2067         ksmbd_close_session_fds(work);
2068         ksmbd_conn_wait_idle(conn);
2069
2070         if (ksmbd_tree_conn_session_logoff(sess)) {
2071                 struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
2072
2073                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2074                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2075                 smb2_set_err_rsp(work);
2076                 return 0;
2077         }
2078
2079         ksmbd_destroy_file_table(&sess->file_table);
2080         sess->state = SMB2_SESSION_EXPIRED;
2081
2082         ksmbd_free_user(sess->user);
2083         sess->user = NULL;
2084
2085         /* let start_tcp_sess free connection info now */
2086         ksmbd_conn_set_need_negotiate(work);
2087         return 0;
2088 }
2089
2090 /**
2091  * create_smb2_pipe() - create IPC pipe
2092  * @work:       smb work containing request buffer
2093  *
2094  * Return:      0 on success, otherwise error
2095  */
2096 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2097 {
2098         struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
2099         struct smb2_create_req *req = smb2_get_msg(work->request_buf);
2100         int id;
2101         int err;
2102         char *name;
2103
2104         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2105                                       1, work->conn->local_nls);
2106         if (IS_ERR(name)) {
2107                 rsp->hdr.Status = STATUS_NO_MEMORY;
2108                 err = PTR_ERR(name);
2109                 goto out;
2110         }
2111
2112         id = ksmbd_session_rpc_open(work->sess, name);
2113         if (id < 0) {
2114                 pr_err("Unable to open RPC pipe: %d\n", id);
2115                 err = id;
2116                 goto out;
2117         }
2118
2119         rsp->hdr.Status = STATUS_SUCCESS;
2120         rsp->StructureSize = cpu_to_le16(89);
2121         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2122         rsp->Flags = 0;
2123         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2124
2125         rsp->CreationTime = cpu_to_le64(0);
2126         rsp->LastAccessTime = cpu_to_le64(0);
2127         rsp->ChangeTime = cpu_to_le64(0);
2128         rsp->AllocationSize = cpu_to_le64(0);
2129         rsp->EndofFile = cpu_to_le64(0);
2130         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2131         rsp->Reserved2 = 0;
2132         rsp->VolatileFileId = cpu_to_le64(id);
2133         rsp->PersistentFileId = 0;
2134         rsp->CreateContextsOffset = 0;
2135         rsp->CreateContextsLength = 0;
2136
2137         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
2138         kfree(name);
2139         return 0;
2140
2141 out:
2142         switch (err) {
2143         case -EINVAL:
2144                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2145                 break;
2146         case -ENOSPC:
2147         case -ENOMEM:
2148                 rsp->hdr.Status = STATUS_NO_MEMORY;
2149                 break;
2150         }
2151
2152         if (!IS_ERR(name))
2153                 kfree(name);
2154
2155         smb2_set_err_rsp(work);
2156         return err;
2157 }
2158
2159 /**
2160  * smb2_set_ea() - handler for setting extended attributes using set
2161  *              info command
2162  * @eabuf:      set info command buffer
2163  * @buf_len:    set info command buffer length
2164  * @path:       dentry path for get ea
2165  *
2166  * Return:      0 on success, otherwise error
2167  */
2168 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2169                        struct path *path)
2170 {
2171         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2172         char *attr_name = NULL, *value;
2173         int rc = 0;
2174         unsigned int next = 0;
2175
2176         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2177                         le16_to_cpu(eabuf->EaValueLength))
2178                 return -EINVAL;
2179
2180         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2181         if (!attr_name)
2182                 return -ENOMEM;
2183
2184         do {
2185                 if (!eabuf->EaNameLength)
2186                         goto next;
2187
2188                 ksmbd_debug(SMB,
2189                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2190                             eabuf->name, eabuf->EaNameLength,
2191                             le16_to_cpu(eabuf->EaValueLength),
2192                             le32_to_cpu(eabuf->NextEntryOffset));
2193
2194                 if (eabuf->EaNameLength >
2195                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2196                         rc = -EINVAL;
2197                         break;
2198                 }
2199
2200                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2201                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2202                        eabuf->EaNameLength);
2203                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2204                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2205
2206                 if (!eabuf->EaValueLength) {
2207                         rc = ksmbd_vfs_casexattr_len(user_ns,
2208                                                      path->dentry,
2209                                                      attr_name,
2210                                                      XATTR_USER_PREFIX_LEN +
2211                                                      eabuf->EaNameLength);
2212
2213                         /* delete the EA only when it exits */
2214                         if (rc > 0) {
2215                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2216                                                             path->dentry,
2217                                                             attr_name);
2218
2219                                 if (rc < 0) {
2220                                         ksmbd_debug(SMB,
2221                                                     "remove xattr failed(%d)\n",
2222                                                     rc);
2223                                         break;
2224                                 }
2225                         }
2226
2227                         /* if the EA doesn't exist, just do nothing. */
2228                         rc = 0;
2229                 } else {
2230                         rc = ksmbd_vfs_setxattr(user_ns,
2231                                                 path->dentry, attr_name, value,
2232                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2233                         if (rc < 0) {
2234                                 ksmbd_debug(SMB,
2235                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2236                                             rc);
2237                                 break;
2238                         }
2239                 }
2240
2241 next:
2242                 next = le32_to_cpu(eabuf->NextEntryOffset);
2243                 if (next == 0 || buf_len < next)
2244                         break;
2245                 buf_len -= next;
2246                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2247                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2248                         break;
2249
2250         } while (next != 0);
2251
2252         kfree(attr_name);
2253         return rc;
2254 }
2255
2256 static noinline int smb2_set_stream_name_xattr(struct path *path,
2257                                                struct ksmbd_file *fp,
2258                                                char *stream_name, int s_type)
2259 {
2260         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2261         size_t xattr_stream_size;
2262         char *xattr_stream_name;
2263         int rc;
2264
2265         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2266                                          &xattr_stream_name,
2267                                          &xattr_stream_size,
2268                                          s_type);
2269         if (rc)
2270                 return rc;
2271
2272         fp->stream.name = xattr_stream_name;
2273         fp->stream.size = xattr_stream_size;
2274
2275         /* Check if there is stream prefix in xattr space */
2276         rc = ksmbd_vfs_casexattr_len(user_ns,
2277                                      path->dentry,
2278                                      xattr_stream_name,
2279                                      xattr_stream_size);
2280         if (rc >= 0)
2281                 return 0;
2282
2283         if (fp->cdoption == FILE_OPEN_LE) {
2284                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2285                 return -EBADF;
2286         }
2287
2288         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2289                                 xattr_stream_name, NULL, 0, 0);
2290         if (rc < 0)
2291                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2292         return 0;
2293 }
2294
2295 static int smb2_remove_smb_xattrs(struct path *path)
2296 {
2297         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2298         char *name, *xattr_list = NULL;
2299         ssize_t xattr_list_len;
2300         int err = 0;
2301
2302         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2303         if (xattr_list_len < 0) {
2304                 goto out;
2305         } else if (!xattr_list_len) {
2306                 ksmbd_debug(SMB, "empty xattr in the file\n");
2307                 goto out;
2308         }
2309
2310         for (name = xattr_list; name - xattr_list < xattr_list_len;
2311                         name += strlen(name) + 1) {
2312                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2313
2314                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2315                     strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
2316                             DOS_ATTRIBUTE_PREFIX_LEN) &&
2317                     strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
2318                         continue;
2319
2320                 err = ksmbd_vfs_remove_xattr(user_ns, path->dentry, name);
2321                 if (err)
2322                         ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
2323         }
2324 out:
2325         kvfree(xattr_list);
2326         return err;
2327 }
2328
2329 static int smb2_create_truncate(struct path *path)
2330 {
2331         int rc = vfs_truncate(path, 0);
2332
2333         if (rc) {
2334                 pr_err("vfs_truncate failed, rc %d\n", rc);
2335                 return rc;
2336         }
2337
2338         rc = smb2_remove_smb_xattrs(path);
2339         if (rc == -EOPNOTSUPP)
2340                 rc = 0;
2341         if (rc)
2342                 ksmbd_debug(SMB,
2343                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2344                             rc);
2345         return rc;
2346 }
2347
2348 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
2349                             struct ksmbd_file *fp)
2350 {
2351         struct xattr_dos_attrib da = {0};
2352         int rc;
2353
2354         if (!test_share_config_flag(tcon->share_conf,
2355                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2356                 return;
2357
2358         da.version = 4;
2359         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2360         da.itime = da.create_time = fp->create_time;
2361         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2362                 XATTR_DOSINFO_ITIME;
2363
2364         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2365                                             path->dentry, &da);
2366         if (rc)
2367                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2368 }
2369
2370 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2371                                struct path *path, struct ksmbd_file *fp)
2372 {
2373         struct xattr_dos_attrib da;
2374         int rc;
2375
2376         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2377
2378         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2379         if (!test_share_config_flag(tcon->share_conf,
2380                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2381                 return;
2382
2383         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2384                                             path->dentry, &da);
2385         if (rc > 0) {
2386                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2387                 fp->create_time = da.create_time;
2388                 fp->itime = da.itime;
2389         }
2390 }
2391
2392 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2393                       int open_flags, umode_t posix_mode, bool is_dir)
2394 {
2395         struct ksmbd_tree_connect *tcon = work->tcon;
2396         struct ksmbd_share_config *share = tcon->share_conf;
2397         umode_t mode;
2398         int rc;
2399
2400         if (!(open_flags & O_CREAT))
2401                 return -EBADF;
2402
2403         ksmbd_debug(SMB, "file does not exist, so creating\n");
2404         if (is_dir == true) {
2405                 ksmbd_debug(SMB, "creating directory\n");
2406
2407                 mode = share_config_directory_mode(share, posix_mode);
2408                 rc = ksmbd_vfs_mkdir(work, name, mode);
2409                 if (rc)
2410                         return rc;
2411         } else {
2412                 ksmbd_debug(SMB, "creating regular file\n");
2413
2414                 mode = share_config_create_mode(share, posix_mode);
2415                 rc = ksmbd_vfs_create(work, name, mode);
2416                 if (rc)
2417                         return rc;
2418         }
2419
2420         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2421         if (rc) {
2422                 pr_err("cannot get linux path (%s), err = %d\n",
2423                        name, rc);
2424                 return rc;
2425         }
2426         return 0;
2427 }
2428
2429 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2430                                  struct smb2_create_req *req,
2431                                  struct path *path)
2432 {
2433         struct create_context *context;
2434         struct create_sd_buf_req *sd_buf;
2435
2436         if (!req->CreateContextsOffset)
2437                 return -ENOENT;
2438
2439         /* Parse SD BUFFER create contexts */
2440         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2441         if (!context)
2442                 return -ENOENT;
2443         else if (IS_ERR(context))
2444                 return PTR_ERR(context);
2445
2446         ksmbd_debug(SMB,
2447                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2448         sd_buf = (struct create_sd_buf_req *)context;
2449         if (le16_to_cpu(context->DataOffset) +
2450             le32_to_cpu(context->DataLength) <
2451             sizeof(struct create_sd_buf_req))
2452                 return -EINVAL;
2453         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2454                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2455 }
2456
2457 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2458                              struct user_namespace *mnt_userns,
2459                              struct inode *inode)
2460 {
2461         fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
2462         fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
2463         fattr->cf_mode = inode->i_mode;
2464         fattr->cf_acls = NULL;
2465         fattr->cf_dacls = NULL;
2466
2467         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2468                 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2469                 if (S_ISDIR(inode->i_mode))
2470                         fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2471         }
2472 }
2473
2474 /**
2475  * smb2_open() - handler for smb file open request
2476  * @work:       smb work containing request buffer
2477  *
2478  * Return:      0 on success, otherwise error
2479  */
2480 int smb2_open(struct ksmbd_work *work)
2481 {
2482         struct ksmbd_conn *conn = work->conn;
2483         struct ksmbd_session *sess = work->sess;
2484         struct ksmbd_tree_connect *tcon = work->tcon;
2485         struct smb2_create_req *req;
2486         struct smb2_create_rsp *rsp;
2487         struct path path;
2488         struct ksmbd_share_config *share = tcon->share_conf;
2489         struct ksmbd_file *fp = NULL;
2490         struct file *filp = NULL;
2491         struct user_namespace *user_ns = NULL;
2492         struct kstat stat;
2493         struct create_context *context;
2494         struct lease_ctx_info *lc = NULL;
2495         struct create_ea_buf_req *ea_buf = NULL;
2496         struct oplock_info *opinfo;
2497         __le32 *next_ptr = NULL;
2498         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2499         int rc = 0;
2500         int contxt_cnt = 0, query_disk_id = 0;
2501         int maximal_access_ctxt = 0, posix_ctxt = 0;
2502         int s_type = 0;
2503         int next_off = 0;
2504         char *name = NULL;
2505         char *stream_name = NULL;
2506         bool file_present = false, created = false, already_permitted = false;
2507         int share_ret, need_truncate = 0;
2508         u64 time;
2509         umode_t posix_mode = 0;
2510         __le32 daccess, maximal_access = 0;
2511
2512         WORK_BUFFERS(work, req, rsp);
2513
2514         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2515             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2516                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2517                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2518                 smb2_set_err_rsp(work);
2519                 return -EINVAL;
2520         }
2521
2522         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2523                 ksmbd_debug(SMB, "IPC pipe create request\n");
2524                 return create_smb2_pipe(work);
2525         }
2526
2527         if (req->NameLength) {
2528                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2529                     *(char *)req->Buffer == '\\') {
2530                         pr_err("not allow directory name included leading slash\n");
2531                         rc = -EINVAL;
2532                         goto err_out1;
2533                 }
2534
2535                 name = smb2_get_name(req->Buffer,
2536                                      le16_to_cpu(req->NameLength),
2537                                      work->conn->local_nls);
2538                 if (IS_ERR(name)) {
2539                         rc = PTR_ERR(name);
2540                         if (rc != -ENOMEM)
2541                                 rc = -ENOENT;
2542                         name = NULL;
2543                         goto err_out1;
2544                 }
2545
2546                 ksmbd_debug(SMB, "converted name = %s\n", name);
2547                 if (strchr(name, ':')) {
2548                         if (!test_share_config_flag(work->tcon->share_conf,
2549                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2550                                 rc = -EBADF;
2551                                 goto err_out1;
2552                         }
2553                         rc = parse_stream_name(name, &stream_name, &s_type);
2554                         if (rc < 0)
2555                                 goto err_out1;
2556                 }
2557
2558                 rc = ksmbd_validate_filename(name);
2559                 if (rc < 0)
2560                         goto err_out1;
2561
2562                 if (ksmbd_share_veto_filename(share, name)) {
2563                         rc = -ENOENT;
2564                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2565                                     name);
2566                         goto err_out1;
2567                 }
2568         } else {
2569                 name = kstrdup("", GFP_KERNEL);
2570                 if (!name) {
2571                         rc = -ENOMEM;
2572                         goto err_out1;
2573                 }
2574         }
2575
2576         req_op_level = req->RequestedOplockLevel;
2577         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2578                 lc = parse_lease_state(req);
2579
2580         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2581                 pr_err("Invalid impersonationlevel : 0x%x\n",
2582                        le32_to_cpu(req->ImpersonationLevel));
2583                 rc = -EIO;
2584                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2585                 goto err_out1;
2586         }
2587
2588         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2589                 pr_err("Invalid create options : 0x%x\n",
2590                        le32_to_cpu(req->CreateOptions));
2591                 rc = -EINVAL;
2592                 goto err_out1;
2593         } else {
2594                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2595                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2596                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2597
2598                 if (req->CreateOptions &
2599                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2600                      FILE_RESERVE_OPFILTER_LE)) {
2601                         rc = -EOPNOTSUPP;
2602                         goto err_out1;
2603                 }
2604
2605                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2606                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2607                                 rc = -EINVAL;
2608                                 goto err_out1;
2609                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2610                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2611                         }
2612                 }
2613         }
2614
2615         if (le32_to_cpu(req->CreateDisposition) >
2616             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2617                 pr_err("Invalid create disposition : 0x%x\n",
2618                        le32_to_cpu(req->CreateDisposition));
2619                 rc = -EINVAL;
2620                 goto err_out1;
2621         }
2622
2623         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2624                 pr_err("Invalid desired access : 0x%x\n",
2625                        le32_to_cpu(req->DesiredAccess));
2626                 rc = -EACCES;
2627                 goto err_out1;
2628         }
2629
2630         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2631                 pr_err("Invalid file attribute : 0x%x\n",
2632                        le32_to_cpu(req->FileAttributes));
2633                 rc = -EINVAL;
2634                 goto err_out1;
2635         }
2636
2637         if (req->CreateContextsOffset) {
2638                 /* Parse non-durable handle create contexts */
2639                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2640                 if (IS_ERR(context)) {
2641                         rc = PTR_ERR(context);
2642                         goto err_out1;
2643                 } else if (context) {
2644                         ea_buf = (struct create_ea_buf_req *)context;
2645                         if (le16_to_cpu(context->DataOffset) +
2646                             le32_to_cpu(context->DataLength) <
2647                             sizeof(struct create_ea_buf_req)) {
2648                                 rc = -EINVAL;
2649                                 goto err_out1;
2650                         }
2651                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2652                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2653                                 rc = -EACCES;
2654                                 goto err_out1;
2655                         }
2656                 }
2657
2658                 context = smb2_find_context_vals(req,
2659                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2660                 if (IS_ERR(context)) {
2661                         rc = PTR_ERR(context);
2662                         goto err_out1;
2663                 } else if (context) {
2664                         ksmbd_debug(SMB,
2665                                     "get query maximal access context\n");
2666                         maximal_access_ctxt = 1;
2667                 }
2668
2669                 context = smb2_find_context_vals(req,
2670                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2671                 if (IS_ERR(context)) {
2672                         rc = PTR_ERR(context);
2673                         goto err_out1;
2674                 } else if (context) {
2675                         ksmbd_debug(SMB, "get timewarp context\n");
2676                         rc = -EBADF;
2677                         goto err_out1;
2678                 }
2679
2680                 if (tcon->posix_extensions) {
2681                         context = smb2_find_context_vals(req,
2682                                                          SMB2_CREATE_TAG_POSIX);
2683                         if (IS_ERR(context)) {
2684                                 rc = PTR_ERR(context);
2685                                 goto err_out1;
2686                         } else if (context) {
2687                                 struct create_posix *posix =
2688                                         (struct create_posix *)context;
2689                                 if (le16_to_cpu(context->DataOffset) +
2690                                     le32_to_cpu(context->DataLength) <
2691                                     sizeof(struct create_posix) - 4) {
2692                                         rc = -EINVAL;
2693                                         goto err_out1;
2694                                 }
2695                                 ksmbd_debug(SMB, "get posix context\n");
2696
2697                                 posix_mode = le32_to_cpu(posix->Mode);
2698                                 posix_ctxt = 1;
2699                         }
2700                 }
2701         }
2702
2703         if (ksmbd_override_fsids(work)) {
2704                 rc = -ENOMEM;
2705                 goto err_out1;
2706         }
2707
2708         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2709         if (!rc) {
2710                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2711                         /*
2712                          * If file exists with under flags, return access
2713                          * denied error.
2714                          */
2715                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2716                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2717                                 rc = -EACCES;
2718                                 path_put(&path);
2719                                 goto err_out;
2720                         }
2721
2722                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2723                                 ksmbd_debug(SMB,
2724                                             "User does not have write permission\n");
2725                                 rc = -EACCES;
2726                                 path_put(&path);
2727                                 goto err_out;
2728                         }
2729                 } else if (d_is_symlink(path.dentry)) {
2730                         rc = -EACCES;
2731                         path_put(&path);
2732                         goto err_out;
2733                 }
2734         }
2735
2736         if (rc) {
2737                 if (rc != -ENOENT)
2738                         goto err_out;
2739                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2740                             name, rc);
2741                 rc = 0;
2742         } else {
2743                 file_present = true;
2744                 user_ns = mnt_user_ns(path.mnt);
2745                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2746         }
2747         if (stream_name) {
2748                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2749                         if (s_type == DATA_STREAM) {
2750                                 rc = -EIO;
2751                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2752                         }
2753                 } else {
2754                         if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
2755                                 rc = -EIO;
2756                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2757                         }
2758                 }
2759
2760                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2761                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2762                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2763                         rc = -EIO;
2764                 }
2765
2766                 if (rc < 0)
2767                         goto err_out;
2768         }
2769
2770         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2771             S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2772                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2773                             name, req->CreateOptions);
2774                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2775                 rc = -EIO;
2776                 goto err_out;
2777         }
2778
2779         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2780             !(req->CreateDisposition == FILE_CREATE_LE) &&
2781             !S_ISDIR(stat.mode)) {
2782                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2783                 rc = -EIO;
2784                 goto err_out;
2785         }
2786
2787         if (!stream_name && file_present &&
2788             req->CreateDisposition == FILE_CREATE_LE) {
2789                 rc = -EEXIST;
2790                 goto err_out;
2791         }
2792
2793         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2794
2795         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2796                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2797                                          sess->user->uid);
2798                 if (rc)
2799                         goto err_out;
2800         }
2801
2802         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2803                 if (!file_present) {
2804                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2805                 } else {
2806                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2807                                                             path.dentry,
2808                                                             &daccess);
2809                         if (rc)
2810                                 goto err_out;
2811                         already_permitted = true;
2812                 }
2813                 maximal_access = daccess;
2814         }
2815
2816         open_flags = smb2_create_open_flags(file_present, daccess,
2817                                             req->CreateDisposition,
2818                                             &may_flags);
2819
2820         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2821                 if (open_flags & O_CREAT) {
2822                         ksmbd_debug(SMB,
2823                                     "User does not have write permission\n");
2824                         rc = -EACCES;
2825                         goto err_out;
2826                 }
2827         }
2828
2829         /*create file if not present */
2830         if (!file_present) {
2831                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2832                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2833                 if (rc) {
2834                         if (rc == -ENOENT) {
2835                                 rc = -EIO;
2836                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2837                         }
2838                         goto err_out;
2839                 }
2840
2841                 created = true;
2842                 user_ns = mnt_user_ns(path.mnt);
2843                 if (ea_buf) {
2844                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2845                             sizeof(struct smb2_ea_info)) {
2846                                 rc = -EINVAL;
2847                                 goto err_out;
2848                         }
2849
2850                         rc = smb2_set_ea(&ea_buf->ea,
2851                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2852                                          &path);
2853                         if (rc == -EOPNOTSUPP)
2854                                 rc = 0;
2855                         else if (rc)
2856                                 goto err_out;
2857                 }
2858         } else if (!already_permitted) {
2859                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2860                  * because execute(search) permission on a parent directory,
2861                  * is already granted.
2862                  */
2863                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2864                         rc = inode_permission(user_ns,
2865                                               d_inode(path.dentry),
2866                                               may_flags);
2867                         if (rc)
2868                                 goto err_out;
2869
2870                         if ((daccess & FILE_DELETE_LE) ||
2871                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2872                                 rc = ksmbd_vfs_may_delete(user_ns,
2873                                                           path.dentry);
2874                                 if (rc)
2875                                         goto err_out;
2876                         }
2877                 }
2878         }
2879
2880         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2881         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2882                 rc = -EBUSY;
2883                 goto err_out;
2884         }
2885
2886         rc = 0;
2887         filp = dentry_open(&path, open_flags, current_cred());
2888         if (IS_ERR(filp)) {
2889                 rc = PTR_ERR(filp);
2890                 pr_err("dentry open for dir failed, rc %d\n", rc);
2891                 goto err_out;
2892         }
2893
2894         if (file_present) {
2895                 if (!(open_flags & O_TRUNC))
2896                         file_info = FILE_OPENED;
2897                 else
2898                         file_info = FILE_OVERWRITTEN;
2899
2900                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2901                     FILE_SUPERSEDE_LE)
2902                         file_info = FILE_SUPERSEDED;
2903         } else if (open_flags & O_CREAT) {
2904                 file_info = FILE_CREATED;
2905         }
2906
2907         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2908
2909         /* Obtain Volatile-ID */
2910         fp = ksmbd_open_fd(work, filp);
2911         if (IS_ERR(fp)) {
2912                 fput(filp);
2913                 rc = PTR_ERR(fp);
2914                 fp = NULL;
2915                 goto err_out;
2916         }
2917
2918         /* Get Persistent-ID */
2919         ksmbd_open_durable_fd(fp);
2920         if (!has_file_id(fp->persistent_id)) {
2921                 rc = -ENOMEM;
2922                 goto err_out;
2923         }
2924
2925         fp->filename = name;
2926         fp->cdoption = req->CreateDisposition;
2927         fp->daccess = daccess;
2928         fp->saccess = req->ShareAccess;
2929         fp->coption = req->CreateOptions;
2930
2931         /* Set default windows and posix acls if creating new file */
2932         if (created) {
2933                 int posix_acl_rc;
2934                 struct inode *inode = d_inode(path.dentry);
2935
2936                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2937                                                            inode,
2938                                                            d_inode(path.dentry->d_parent));
2939                 if (posix_acl_rc)
2940                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2941
2942                 if (test_share_config_flag(work->tcon->share_conf,
2943                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2944                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2945                                               sess->user->gid);
2946                 }
2947
2948                 if (rc) {
2949                         rc = smb2_create_sd_buffer(work, req, &path);
2950                         if (rc) {
2951                                 if (posix_acl_rc)
2952                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2953                                                                      inode);
2954
2955                                 if (test_share_config_flag(work->tcon->share_conf,
2956                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2957                                         struct smb_fattr fattr;
2958                                         struct smb_ntsd *pntsd;
2959                                         int pntsd_size, ace_num = 0;
2960
2961                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2962                                         if (fattr.cf_acls)
2963                                                 ace_num = fattr.cf_acls->a_count;
2964                                         if (fattr.cf_dacls)
2965                                                 ace_num += fattr.cf_dacls->a_count;
2966
2967                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2968                                                         sizeof(struct smb_sid) * 3 +
2969                                                         sizeof(struct smb_acl) +
2970                                                         sizeof(struct smb_ace) * ace_num * 2,
2971                                                         GFP_KERNEL);
2972                                         if (!pntsd)
2973                                                 goto err_out;
2974
2975                                         rc = build_sec_desc(user_ns,
2976                                                             pntsd, NULL,
2977                                                             OWNER_SECINFO |
2978                                                             GROUP_SECINFO |
2979                                                             DACL_SECINFO,
2980                                                             &pntsd_size, &fattr);
2981                                         posix_acl_release(fattr.cf_acls);
2982                                         posix_acl_release(fattr.cf_dacls);
2983                                         if (rc) {
2984                                                 kfree(pntsd);
2985                                                 goto err_out;
2986                                         }
2987
2988                                         rc = ksmbd_vfs_set_sd_xattr(conn,
2989                                                                     user_ns,
2990                                                                     path.dentry,
2991                                                                     pntsd,
2992                                                                     pntsd_size);
2993                                         kfree(pntsd);
2994                                         if (rc)
2995                                                 pr_err("failed to store ntacl in xattr : %d\n",
2996                                                        rc);
2997                                 }
2998                         }
2999                 }
3000                 rc = 0;
3001         }
3002
3003         if (stream_name) {
3004                 rc = smb2_set_stream_name_xattr(&path,
3005                                                 fp,
3006                                                 stream_name,
3007                                                 s_type);
3008                 if (rc)
3009                         goto err_out;
3010                 file_info = FILE_CREATED;
3011         }
3012
3013         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3014                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3015         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3016             !fp->attrib_only && !stream_name) {
3017                 smb_break_all_oplock(work, fp);
3018                 need_truncate = 1;
3019         }
3020
3021         /* fp should be searchable through ksmbd_inode.m_fp_list
3022          * after daccess, saccess, attrib_only, and stream are
3023          * initialized.
3024          */
3025         write_lock(&fp->f_ci->m_lock);
3026         list_add(&fp->node, &fp->f_ci->m_fp_list);
3027         write_unlock(&fp->f_ci->m_lock);
3028
3029         rc = ksmbd_vfs_getattr(&path, &stat);
3030         if (rc) {
3031                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
3032                 rc = 0;
3033         }
3034
3035         /* Check delete pending among previous fp before oplock break */
3036         if (ksmbd_inode_pending_delete(fp)) {
3037                 rc = -EBUSY;
3038                 goto err_out;
3039         }
3040
3041         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3042         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3043             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3044              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3045                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3046                         rc = share_ret;
3047                         goto err_out;
3048                 }
3049         } else {
3050                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3051                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3052                         ksmbd_debug(SMB,
3053                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3054                                     name, req_op_level, lc->req_state);
3055                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3056                         if (rc)
3057                                 goto err_out;
3058                 } else if (open_flags == O_RDONLY &&
3059                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3060                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3061                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3062
3063                 rc = smb_grant_oplock(work, req_op_level,
3064                                       fp->persistent_id, fp,
3065                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3066                                       lc, share_ret);
3067                 if (rc < 0)
3068                         goto err_out;
3069         }
3070
3071         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3072                 ksmbd_fd_set_delete_on_close(fp, file_info);
3073
3074         if (need_truncate) {
3075                 rc = smb2_create_truncate(&path);
3076                 if (rc)
3077                         goto err_out;
3078         }
3079
3080         if (req->CreateContextsOffset) {
3081                 struct create_alloc_size_req *az_req;
3082
3083                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3084                                         SMB2_CREATE_ALLOCATION_SIZE);
3085                 if (IS_ERR(az_req)) {
3086                         rc = PTR_ERR(az_req);
3087                         goto err_out;
3088                 } else if (az_req) {
3089                         loff_t alloc_size;
3090                         int err;
3091
3092                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3093                             le32_to_cpu(az_req->ccontext.DataLength) <
3094                             sizeof(struct create_alloc_size_req)) {
3095                                 rc = -EINVAL;
3096                                 goto err_out;
3097                         }
3098                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3099                         ksmbd_debug(SMB,
3100                                     "request smb2 create allocate size : %llu\n",
3101                                     alloc_size);
3102                         smb_break_all_levII_oplock(work, fp, 1);
3103                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3104                                             alloc_size);
3105                         if (err < 0)
3106                                 ksmbd_debug(SMB,
3107                                             "vfs_fallocate is failed : %d\n",
3108                                             err);
3109                 }
3110
3111                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3112                 if (IS_ERR(context)) {
3113                         rc = PTR_ERR(context);
3114                         goto err_out;
3115                 } else if (context) {
3116                         ksmbd_debug(SMB, "get query on disk id context\n");
3117                         query_disk_id = 1;
3118                 }
3119         }
3120
3121         if (stat.result_mask & STATX_BTIME)
3122                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3123         else
3124                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3125         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3126                 fp->f_ci->m_fattr =
3127                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3128
3129         if (!created)
3130                 smb2_update_xattrs(tcon, &path, fp);
3131         else
3132                 smb2_new_xattrs(tcon, &path, fp);
3133
3134         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3135
3136         generic_fillattr(user_ns, file_inode(fp->filp),
3137                          &stat);
3138
3139         rsp->StructureSize = cpu_to_le16(89);
3140         rcu_read_lock();
3141         opinfo = rcu_dereference(fp->f_opinfo);
3142         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3143         rcu_read_unlock();
3144         rsp->Flags = 0;
3145         rsp->CreateAction = cpu_to_le32(file_info);
3146         rsp->CreationTime = cpu_to_le64(fp->create_time);
3147         time = ksmbd_UnixTimeToNT(stat.atime);
3148         rsp->LastAccessTime = cpu_to_le64(time);
3149         time = ksmbd_UnixTimeToNT(stat.mtime);
3150         rsp->LastWriteTime = cpu_to_le64(time);
3151         time = ksmbd_UnixTimeToNT(stat.ctime);
3152         rsp->ChangeTime = cpu_to_le64(time);
3153         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3154                 cpu_to_le64(stat.blocks << 9);
3155         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3156         rsp->FileAttributes = fp->f_ci->m_fattr;
3157
3158         rsp->Reserved2 = 0;
3159
3160         rsp->PersistentFileId = cpu_to_le64(fp->persistent_id);
3161         rsp->VolatileFileId = cpu_to_le64(fp->volatile_id);
3162
3163         rsp->CreateContextsOffset = 0;
3164         rsp->CreateContextsLength = 0;
3165         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
3166
3167         /* If lease is request send lease context response */
3168         if (opinfo && opinfo->is_lease) {
3169                 struct create_context *lease_ccontext;
3170
3171                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3172                             name, opinfo->o_lease->state);
3173                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3174
3175                 lease_ccontext = (struct create_context *)rsp->Buffer;
3176                 contxt_cnt++;
3177                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3178                 le32_add_cpu(&rsp->CreateContextsLength,
3179                              conn->vals->create_lease_size);
3180                 inc_rfc1001_len(work->response_buf,
3181                                 conn->vals->create_lease_size);
3182                 next_ptr = &lease_ccontext->Next;
3183                 next_off = conn->vals->create_lease_size;
3184         }
3185
3186         if (maximal_access_ctxt) {
3187                 struct create_context *mxac_ccontext;
3188
3189                 if (maximal_access == 0)
3190                         ksmbd_vfs_query_maximal_access(user_ns,
3191                                                        path.dentry,
3192                                                        &maximal_access);
3193                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3194                                 le32_to_cpu(rsp->CreateContextsLength));
3195                 contxt_cnt++;
3196                 create_mxac_rsp_buf(rsp->Buffer +
3197                                 le32_to_cpu(rsp->CreateContextsLength),
3198                                 le32_to_cpu(maximal_access));
3199                 le32_add_cpu(&rsp->CreateContextsLength,
3200                              conn->vals->create_mxac_size);
3201                 inc_rfc1001_len(work->response_buf,
3202                                 conn->vals->create_mxac_size);
3203                 if (next_ptr)
3204                         *next_ptr = cpu_to_le32(next_off);
3205                 next_ptr = &mxac_ccontext->Next;
3206                 next_off = conn->vals->create_mxac_size;
3207         }
3208
3209         if (query_disk_id) {
3210                 struct create_context *disk_id_ccontext;
3211
3212                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3213                                 le32_to_cpu(rsp->CreateContextsLength));
3214                 contxt_cnt++;
3215                 create_disk_id_rsp_buf(rsp->Buffer +
3216                                 le32_to_cpu(rsp->CreateContextsLength),
3217                                 stat.ino, tcon->id);
3218                 le32_add_cpu(&rsp->CreateContextsLength,
3219                              conn->vals->create_disk_id_size);
3220                 inc_rfc1001_len(work->response_buf,
3221                                 conn->vals->create_disk_id_size);
3222                 if (next_ptr)
3223                         *next_ptr = cpu_to_le32(next_off);
3224                 next_ptr = &disk_id_ccontext->Next;
3225                 next_off = conn->vals->create_disk_id_size;
3226         }
3227
3228         if (posix_ctxt) {
3229                 contxt_cnt++;
3230                 create_posix_rsp_buf(rsp->Buffer +
3231                                 le32_to_cpu(rsp->CreateContextsLength),
3232                                 fp);
3233                 le32_add_cpu(&rsp->CreateContextsLength,
3234                              conn->vals->create_posix_size);
3235                 inc_rfc1001_len(work->response_buf,
3236                                 conn->vals->create_posix_size);
3237                 if (next_ptr)
3238                         *next_ptr = cpu_to_le32(next_off);
3239         }
3240
3241         if (contxt_cnt > 0) {
3242                 rsp->CreateContextsOffset =
3243                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3244         }
3245
3246 err_out:
3247         if (file_present || created)
3248                 path_put(&path);
3249         ksmbd_revert_fsids(work);
3250 err_out1:
3251         if (rc) {
3252                 if (rc == -EINVAL)
3253                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3254                 else if (rc == -EOPNOTSUPP)
3255                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3256                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3257                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3258                 else if (rc == -ENOENT)
3259                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3260                 else if (rc == -EPERM)
3261                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3262                 else if (rc == -EBUSY)
3263                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3264                 else if (rc == -EBADF)
3265                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3266                 else if (rc == -ENOEXEC)
3267                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3268                 else if (rc == -ENXIO)
3269                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3270                 else if (rc == -EEXIST)
3271                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3272                 else if (rc == -EMFILE)
3273                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3274                 if (!rsp->hdr.Status)
3275                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3276
3277                 if (!fp || !fp->filename)
3278                         kfree(name);
3279                 if (fp)
3280                         ksmbd_fd_put(work, fp);
3281                 smb2_set_err_rsp(work);
3282                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3283         }
3284
3285         kfree(lc);
3286
3287         return 0;
3288 }
3289
3290 static int readdir_info_level_struct_sz(int info_level)
3291 {
3292         switch (info_level) {
3293         case FILE_FULL_DIRECTORY_INFORMATION:
3294                 return sizeof(struct file_full_directory_info);
3295         case FILE_BOTH_DIRECTORY_INFORMATION:
3296                 return sizeof(struct file_both_directory_info);
3297         case FILE_DIRECTORY_INFORMATION:
3298                 return sizeof(struct file_directory_info);
3299         case FILE_NAMES_INFORMATION:
3300                 return sizeof(struct file_names_info);
3301         case FILEID_FULL_DIRECTORY_INFORMATION:
3302                 return sizeof(struct file_id_full_dir_info);
3303         case FILEID_BOTH_DIRECTORY_INFORMATION:
3304                 return sizeof(struct file_id_both_directory_info);
3305         case SMB_FIND_FILE_POSIX_INFO:
3306                 return sizeof(struct smb2_posix_info);
3307         default:
3308                 return -EOPNOTSUPP;
3309         }
3310 }
3311
3312 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3313 {
3314         switch (info_level) {
3315         case FILE_FULL_DIRECTORY_INFORMATION:
3316         {
3317                 struct file_full_directory_info *ffdinfo;
3318
3319                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3320                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3321                 d_info->name = ffdinfo->FileName;
3322                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3323                 return 0;
3324         }
3325         case FILE_BOTH_DIRECTORY_INFORMATION:
3326         {
3327                 struct file_both_directory_info *fbdinfo;
3328
3329                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3330                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3331                 d_info->name = fbdinfo->FileName;
3332                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3333                 return 0;
3334         }
3335         case FILE_DIRECTORY_INFORMATION:
3336         {
3337                 struct file_directory_info *fdinfo;
3338
3339                 fdinfo = (struct file_directory_info *)d_info->rptr;
3340                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3341                 d_info->name = fdinfo->FileName;
3342                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3343                 return 0;
3344         }
3345         case FILE_NAMES_INFORMATION:
3346         {
3347                 struct file_names_info *fninfo;
3348
3349                 fninfo = (struct file_names_info *)d_info->rptr;
3350                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3351                 d_info->name = fninfo->FileName;
3352                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3353                 return 0;
3354         }
3355         case FILEID_FULL_DIRECTORY_INFORMATION:
3356         {
3357                 struct file_id_full_dir_info *dinfo;
3358
3359                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3360                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3361                 d_info->name = dinfo->FileName;
3362                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3363                 return 0;
3364         }
3365         case FILEID_BOTH_DIRECTORY_INFORMATION:
3366         {
3367                 struct file_id_both_directory_info *fibdinfo;
3368
3369                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3370                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3371                 d_info->name = fibdinfo->FileName;
3372                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3373                 return 0;
3374         }
3375         case SMB_FIND_FILE_POSIX_INFO:
3376         {
3377                 struct smb2_posix_info *posix_info;
3378
3379                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3380                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3381                 d_info->name = posix_info->name;
3382                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3383                 return 0;
3384         }
3385         default:
3386                 return -EINVAL;
3387         }
3388 }
3389
3390 /**
3391  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3392  * buffer
3393  * @conn:       connection instance
3394  * @info_level: smb information level
3395  * @d_info:     structure included variables for query dir
3396  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3397  *
3398  * if directory has many entries, find first can't read it fully.
3399  * find next might be called multiple times to read remaining dir entries
3400  *
3401  * Return:      0 on success, otherwise error
3402  */
3403 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3404                                        struct ksmbd_dir_info *d_info,
3405                                        struct ksmbd_kstat *ksmbd_kstat)
3406 {
3407         int next_entry_offset = 0;
3408         char *conv_name;
3409         int conv_len;
3410         void *kstat;
3411         int struct_sz, rc = 0;
3412
3413         conv_name = ksmbd_convert_dir_info_name(d_info,
3414                                                 conn->local_nls,
3415                                                 &conv_len);
3416         if (!conv_name)
3417                 return -ENOMEM;
3418
3419         /* Somehow the name has only terminating NULL bytes */
3420         if (conv_len < 0) {
3421                 rc = -EINVAL;
3422                 goto free_conv_name;
3423         }
3424
3425         struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
3426         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3427         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3428
3429         if (next_entry_offset > d_info->out_buf_len) {
3430                 d_info->out_buf_len = 0;
3431                 rc = -ENOSPC;
3432                 goto free_conv_name;
3433         }
3434
3435         kstat = d_info->wptr;
3436         if (info_level != FILE_NAMES_INFORMATION)
3437                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3438
3439         switch (info_level) {
3440         case FILE_FULL_DIRECTORY_INFORMATION:
3441         {
3442                 struct file_full_directory_info *ffdinfo;
3443
3444                 ffdinfo = (struct file_full_directory_info *)kstat;
3445                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3446                 ffdinfo->EaSize =
3447                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3448                 if (ffdinfo->EaSize)
3449                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3450                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3451                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3452                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3453                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3454                 break;
3455         }
3456         case FILE_BOTH_DIRECTORY_INFORMATION:
3457         {
3458                 struct file_both_directory_info *fbdinfo;
3459
3460                 fbdinfo = (struct file_both_directory_info *)kstat;
3461                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3462                 fbdinfo->EaSize =
3463                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3464                 if (fbdinfo->EaSize)
3465                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3466                 fbdinfo->ShortNameLength = 0;
3467                 fbdinfo->Reserved = 0;
3468                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3469                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3470                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3471                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3472                 break;
3473         }
3474         case FILE_DIRECTORY_INFORMATION:
3475         {
3476                 struct file_directory_info *fdinfo;
3477
3478                 fdinfo = (struct file_directory_info *)kstat;
3479                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3480                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3481                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3482                 memcpy(fdinfo->FileName, conv_name, conv_len);
3483                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3484                 break;
3485         }
3486         case FILE_NAMES_INFORMATION:
3487         {
3488                 struct file_names_info *fninfo;
3489
3490                 fninfo = (struct file_names_info *)kstat;
3491                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3492                 memcpy(fninfo->FileName, conv_name, conv_len);
3493                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3494                 break;
3495         }
3496         case FILEID_FULL_DIRECTORY_INFORMATION:
3497         {
3498                 struct file_id_full_dir_info *dinfo;
3499
3500                 dinfo = (struct file_id_full_dir_info *)kstat;
3501                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3502                 dinfo->EaSize =
3503                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3504                 if (dinfo->EaSize)
3505                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3506                 dinfo->Reserved = 0;
3507                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3508                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3509                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3510                 memcpy(dinfo->FileName, conv_name, conv_len);
3511                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3512                 break;
3513         }
3514         case FILEID_BOTH_DIRECTORY_INFORMATION:
3515         {
3516                 struct file_id_both_directory_info *fibdinfo;
3517
3518                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3519                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3520                 fibdinfo->EaSize =
3521                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3522                 if (fibdinfo->EaSize)
3523                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3524                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3525                 fibdinfo->ShortNameLength = 0;
3526                 fibdinfo->Reserved = 0;
3527                 fibdinfo->Reserved2 = cpu_to_le16(0);
3528                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3529                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3530                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3531                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3532                 break;
3533         }
3534         case SMB_FIND_FILE_POSIX_INFO:
3535         {
3536                 struct smb2_posix_info *posix_info;
3537                 u64 time;
3538
3539                 posix_info = (struct smb2_posix_info *)kstat;
3540                 posix_info->Ignored = 0;
3541                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3542                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3543                 posix_info->ChangeTime = cpu_to_le64(time);
3544                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3545                 posix_info->LastAccessTime = cpu_to_le64(time);
3546                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3547                 posix_info->LastWriteTime = cpu_to_le64(time);
3548                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3549                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3550                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3551                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3552                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
3553                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3554                 posix_info->DosAttributes =
3555                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3556                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3557                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3558                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3559                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3560                           SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3561                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3562                           SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
3563                 memcpy(posix_info->name, conv_name, conv_len);
3564                 posix_info->name_len = cpu_to_le32(conv_len);
3565                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3566                 break;
3567         }
3568
3569         } /* switch (info_level) */
3570
3571         d_info->last_entry_offset = d_info->data_count;
3572         d_info->data_count += next_entry_offset;
3573         d_info->out_buf_len -= next_entry_offset;
3574         d_info->wptr += next_entry_offset;
3575
3576         ksmbd_debug(SMB,
3577                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3578                     info_level, d_info->out_buf_len,
3579                     next_entry_offset, d_info->data_count);
3580
3581 free_conv_name:
3582         kfree(conv_name);
3583         return rc;
3584 }
3585
3586 struct smb2_query_dir_private {
3587         struct ksmbd_work       *work;
3588         char                    *search_pattern;
3589         struct ksmbd_file       *dir_fp;
3590
3591         struct ksmbd_dir_info   *d_info;
3592         int                     info_level;
3593 };
3594
3595 static void lock_dir(struct ksmbd_file *dir_fp)
3596 {
3597         struct dentry *dir = dir_fp->filp->f_path.dentry;
3598
3599         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3600 }
3601
3602 static void unlock_dir(struct ksmbd_file *dir_fp)
3603 {
3604         struct dentry *dir = dir_fp->filp->f_path.dentry;
3605
3606         inode_unlock(d_inode(dir));
3607 }
3608
3609 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3610 {
3611         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3612         struct kstat            kstat;
3613         struct ksmbd_kstat      ksmbd_kstat;
3614         int                     rc;
3615         int                     i;
3616
3617         for (i = 0; i < priv->d_info->num_entry; i++) {
3618                 struct dentry *dent;
3619
3620                 if (dentry_name(priv->d_info, priv->info_level))
3621                         return -EINVAL;
3622
3623                 lock_dir(priv->dir_fp);
3624                 dent = lookup_one(user_ns, priv->d_info->name,
3625                                   priv->dir_fp->filp->f_path.dentry,
3626                                   priv->d_info->name_len);
3627                 unlock_dir(priv->dir_fp);
3628
3629                 if (IS_ERR(dent)) {
3630                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3631                                     priv->d_info->name,
3632                                     PTR_ERR(dent));
3633                         continue;
3634                 }
3635                 if (unlikely(d_is_negative(dent))) {
3636                         dput(dent);
3637                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3638                                     priv->d_info->name);
3639                         continue;
3640                 }
3641
3642                 ksmbd_kstat.kstat = &kstat;
3643                 if (priv->info_level != FILE_NAMES_INFORMATION)
3644                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3645                                                     user_ns,
3646                                                     dent,
3647                                                     &ksmbd_kstat);
3648
3649                 rc = smb2_populate_readdir_entry(priv->work->conn,
3650                                                  priv->info_level,
3651                                                  priv->d_info,
3652                                                  &ksmbd_kstat);
3653                 dput(dent);
3654                 if (rc)
3655                         return rc;
3656         }
3657         return 0;
3658 }
3659
3660 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3661                                    int info_level)
3662 {
3663         int struct_sz;
3664         int conv_len;
3665         int next_entry_offset;
3666
3667         struct_sz = readdir_info_level_struct_sz(info_level);
3668         if (struct_sz == -EOPNOTSUPP)
3669                 return -EOPNOTSUPP;
3670
3671         conv_len = (d_info->name_len + 1) * 2;
3672         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3673                                   KSMBD_DIR_INFO_ALIGNMENT);
3674
3675         if (next_entry_offset > d_info->out_buf_len) {
3676                 d_info->out_buf_len = 0;
3677                 return -ENOSPC;
3678         }
3679
3680         switch (info_level) {
3681         case FILE_FULL_DIRECTORY_INFORMATION:
3682         {
3683                 struct file_full_directory_info *ffdinfo;
3684
3685                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3686                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3687                 ffdinfo->FileName[d_info->name_len] = 0x00;
3688                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3689                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3690                 break;
3691         }
3692         case FILE_BOTH_DIRECTORY_INFORMATION:
3693         {
3694                 struct file_both_directory_info *fbdinfo;
3695
3696                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3697                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3698                 fbdinfo->FileName[d_info->name_len] = 0x00;
3699                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3700                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3701                 break;
3702         }
3703         case FILE_DIRECTORY_INFORMATION:
3704         {
3705                 struct file_directory_info *fdinfo;
3706
3707                 fdinfo = (struct file_directory_info *)d_info->wptr;
3708                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3709                 fdinfo->FileName[d_info->name_len] = 0x00;
3710                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3711                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3712                 break;
3713         }
3714         case FILE_NAMES_INFORMATION:
3715         {
3716                 struct file_names_info *fninfo;
3717
3718                 fninfo = (struct file_names_info *)d_info->wptr;
3719                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3720                 fninfo->FileName[d_info->name_len] = 0x00;
3721                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3722                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3723                 break;
3724         }
3725         case FILEID_FULL_DIRECTORY_INFORMATION:
3726         {
3727                 struct file_id_full_dir_info *dinfo;
3728
3729                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3730                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3731                 dinfo->FileName[d_info->name_len] = 0x00;
3732                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3733                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3734                 break;
3735         }
3736         case FILEID_BOTH_DIRECTORY_INFORMATION:
3737         {
3738                 struct file_id_both_directory_info *fibdinfo;
3739
3740                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3741                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3742                 fibdinfo->FileName[d_info->name_len] = 0x00;
3743                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3744                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3745                 break;
3746         }
3747         case SMB_FIND_FILE_POSIX_INFO:
3748         {
3749                 struct smb2_posix_info *posix_info;
3750
3751                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3752                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3753                 posix_info->name[d_info->name_len] = 0x00;
3754                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3755                 posix_info->NextEntryOffset =
3756                         cpu_to_le32(next_entry_offset);
3757                 break;
3758         }
3759         } /* switch (info_level) */
3760
3761         d_info->num_entry++;
3762         d_info->out_buf_len -= next_entry_offset;
3763         d_info->wptr += next_entry_offset;
3764         return 0;
3765 }
3766
3767 static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
3768                        loff_t offset, u64 ino, unsigned int d_type)
3769 {
3770         struct ksmbd_readdir_data       *buf;
3771         struct smb2_query_dir_private   *priv;
3772         struct ksmbd_dir_info           *d_info;
3773         int                             rc;
3774
3775         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3776         priv    = buf->private;
3777         d_info  = priv->d_info;
3778
3779         /* dot and dotdot entries are already reserved */
3780         if (!strcmp(".", name) || !strcmp("..", name))
3781                 return 0;
3782         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3783                 return 0;
3784         if (!match_pattern(name, namlen, priv->search_pattern))
3785                 return 0;
3786
3787         d_info->name            = name;
3788         d_info->name_len        = namlen;
3789         rc = reserve_populate_dentry(d_info, priv->info_level);
3790         if (rc)
3791                 return rc;
3792         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
3793                 d_info->out_buf_len = 0;
3794                 return 0;
3795         }
3796         return 0;
3797 }
3798
3799 static void restart_ctx(struct dir_context *ctx)
3800 {
3801         ctx->pos = 0;
3802 }
3803
3804 static int verify_info_level(int info_level)
3805 {
3806         switch (info_level) {
3807         case FILE_FULL_DIRECTORY_INFORMATION:
3808         case FILE_BOTH_DIRECTORY_INFORMATION:
3809         case FILE_DIRECTORY_INFORMATION:
3810         case FILE_NAMES_INFORMATION:
3811         case FILEID_FULL_DIRECTORY_INFORMATION:
3812         case FILEID_BOTH_DIRECTORY_INFORMATION:
3813         case SMB_FIND_FILE_POSIX_INFO:
3814                 break;
3815         default:
3816                 return -EOPNOTSUPP;
3817         }
3818
3819         return 0;
3820 }
3821
3822 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3823                                      unsigned short hdr2_len,
3824                                      unsigned int out_buf_len)
3825 {
3826         int free_len;
3827
3828         if (out_buf_len > work->conn->vals->max_trans_size)
3829                 return -EINVAL;
3830
3831         free_len = (int)(work->response_sz -
3832                          (get_rfc1002_len(work->response_buf) + 4)) -
3833                 hdr2_len;
3834         if (free_len < 0)
3835                 return -EINVAL;
3836
3837         return min_t(int, out_buf_len, free_len);
3838 }
3839
3840 int smb2_query_dir(struct ksmbd_work *work)
3841 {
3842         struct ksmbd_conn *conn = work->conn;
3843         struct smb2_query_directory_req *req;
3844         struct smb2_query_directory_rsp *rsp;
3845         struct ksmbd_share_config *share = work->tcon->share_conf;
3846         struct ksmbd_file *dir_fp = NULL;
3847         struct ksmbd_dir_info d_info;
3848         int rc = 0;
3849         char *srch_ptr = NULL;
3850         unsigned char srch_flag;
3851         int buffer_sz;
3852         struct smb2_query_dir_private query_dir_private = {NULL, };
3853
3854         WORK_BUFFERS(work, req, rsp);
3855
3856         if (ksmbd_override_fsids(work)) {
3857                 rsp->hdr.Status = STATUS_NO_MEMORY;
3858                 smb2_set_err_rsp(work);
3859                 return -ENOMEM;
3860         }
3861
3862         rc = verify_info_level(req->FileInformationClass);
3863         if (rc) {
3864                 rc = -EFAULT;
3865                 goto err_out2;
3866         }
3867
3868         dir_fp = ksmbd_lookup_fd_slow(work,
3869                                       le64_to_cpu(req->VolatileFileId),
3870                                       le64_to_cpu(req->PersistentFileId));
3871         if (!dir_fp) {
3872                 rc = -EBADF;
3873                 goto err_out2;
3874         }
3875
3876         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3877             inode_permission(file_mnt_user_ns(dir_fp->filp),
3878                              file_inode(dir_fp->filp),
3879                              MAY_READ | MAY_EXEC)) {
3880                 pr_err("no right to enumerate directory (%pd)\n",
3881                        dir_fp->filp->f_path.dentry);
3882                 rc = -EACCES;
3883                 goto err_out2;
3884         }
3885
3886         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3887                 pr_err("can't do query dir for a file\n");
3888                 rc = -EINVAL;
3889                 goto err_out2;
3890         }
3891
3892         srch_flag = req->Flags;
3893         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3894                                           le16_to_cpu(req->FileNameLength), 1,
3895                                           conn->local_nls);
3896         if (IS_ERR(srch_ptr)) {
3897                 ksmbd_debug(SMB, "Search Pattern not found\n");
3898                 rc = -EINVAL;
3899                 goto err_out2;
3900         } else {
3901                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3902         }
3903
3904         ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
3905
3906         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3907                 ksmbd_debug(SMB, "Restart directory scan\n");
3908                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3909                 restart_ctx(&dir_fp->readdir_data.ctx);
3910         }
3911
3912         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3913         d_info.wptr = (char *)rsp->Buffer;
3914         d_info.rptr = (char *)rsp->Buffer;
3915         d_info.out_buf_len =
3916                 smb2_calc_max_out_buf_len(work, 8,
3917                                           le32_to_cpu(req->OutputBufferLength));
3918         if (d_info.out_buf_len < 0) {
3919                 rc = -EINVAL;
3920                 goto err_out;
3921         }
3922         d_info.flags = srch_flag;
3923
3924         /*
3925          * reserve dot and dotdot entries in head of buffer
3926          * in first response
3927          */
3928         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3929                                                dir_fp, &d_info, srch_ptr,
3930                                                smb2_populate_readdir_entry);
3931         if (rc == -ENOSPC)
3932                 rc = 0;
3933         else if (rc)
3934                 goto err_out;
3935
3936         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3937                 d_info.hide_dot_file = true;
3938
3939         buffer_sz                               = d_info.out_buf_len;
3940         d_info.rptr                             = d_info.wptr;
3941         query_dir_private.work                  = work;
3942         query_dir_private.search_pattern        = srch_ptr;
3943         query_dir_private.dir_fp                = dir_fp;
3944         query_dir_private.d_info                = &d_info;
3945         query_dir_private.info_level            = req->FileInformationClass;
3946         dir_fp->readdir_data.private            = &query_dir_private;
3947         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3948
3949         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3950         if (rc == 0)
3951                 restart_ctx(&dir_fp->readdir_data.ctx);
3952         if (rc == -ENOSPC)
3953                 rc = 0;
3954         if (rc)
3955                 goto err_out;
3956
3957         d_info.wptr = d_info.rptr;
3958         d_info.out_buf_len = buffer_sz;
3959         rc = process_query_dir_entries(&query_dir_private);
3960         if (rc)
3961                 goto err_out;
3962
3963         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3964                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3965                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3966                 } else {
3967                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3968                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3969                 }
3970                 rsp->StructureSize = cpu_to_le16(9);
3971                 rsp->OutputBufferOffset = cpu_to_le16(0);
3972                 rsp->OutputBufferLength = cpu_to_le32(0);
3973                 rsp->Buffer[0] = 0;
3974                 inc_rfc1001_len(work->response_buf, 9);
3975         } else {
3976                 ((struct file_directory_info *)
3977                 ((char *)rsp->Buffer + d_info.last_entry_offset))
3978                 ->NextEntryOffset = 0;
3979                 d_info.data_count -= d_info.last_entry_off_align;
3980
3981                 rsp->StructureSize = cpu_to_le16(9);
3982                 rsp->OutputBufferOffset = cpu_to_le16(72);
3983                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
3984                 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
3985         }
3986
3987         kfree(srch_ptr);
3988         ksmbd_fd_put(work, dir_fp);
3989         ksmbd_revert_fsids(work);
3990         return 0;
3991
3992 err_out:
3993         pr_err("error while processing smb2 query dir rc = %d\n", rc);
3994         kfree(srch_ptr);
3995
3996 err_out2:
3997         if (rc == -EINVAL)
3998                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3999         else if (rc == -EACCES)
4000                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4001         else if (rc == -ENOENT)
4002                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4003         else if (rc == -EBADF)
4004                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4005         else if (rc == -ENOMEM)
4006                 rsp->hdr.Status = STATUS_NO_MEMORY;
4007         else if (rc == -EFAULT)
4008                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4009         if (!rsp->hdr.Status)
4010                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4011
4012         smb2_set_err_rsp(work);
4013         ksmbd_fd_put(work, dir_fp);
4014         ksmbd_revert_fsids(work);
4015         return 0;
4016 }
4017
4018 /**
4019  * buffer_check_err() - helper function to check buffer errors
4020  * @reqOutputBufferLength:      max buffer length expected in command response
4021  * @rsp:                query info response buffer contains output buffer length
4022  * @rsp_org:            base response buffer pointer in case of chained response
4023  * @infoclass_size:     query info class response buffer size
4024  *
4025  * Return:      0 on success, otherwise error
4026  */
4027 static int buffer_check_err(int reqOutputBufferLength,
4028                             struct smb2_query_info_rsp *rsp,
4029                             void *rsp_org, int infoclass_size)
4030 {
4031         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4032                 if (reqOutputBufferLength < infoclass_size) {
4033                         pr_err("Invalid Buffer Size Requested\n");
4034                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4035                         *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4036                         return -EINVAL;
4037                 }
4038
4039                 ksmbd_debug(SMB, "Buffer Overflow\n");
4040                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4041                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
4042                                 reqOutputBufferLength);
4043                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4044         }
4045         return 0;
4046 }
4047
4048 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4049                                    void *rsp_org)
4050 {
4051         struct smb2_file_standard_info *sinfo;
4052
4053         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4054
4055         sinfo->AllocationSize = cpu_to_le64(4096);
4056         sinfo->EndOfFile = cpu_to_le64(0);
4057         sinfo->NumberOfLinks = cpu_to_le32(1);
4058         sinfo->DeletePending = 1;
4059         sinfo->Directory = 0;
4060         rsp->OutputBufferLength =
4061                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4062         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
4063 }
4064
4065 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4066                                    void *rsp_org)
4067 {
4068         struct smb2_file_internal_info *file_info;
4069
4070         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4071
4072         /* any unique number */
4073         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4074         rsp->OutputBufferLength =
4075                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4076         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4077 }
4078
4079 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4080                                    struct smb2_query_info_req *req,
4081                                    struct smb2_query_info_rsp *rsp,
4082                                    void *rsp_org)
4083 {
4084         u64 id;
4085         int rc;
4086
4087         /*
4088          * Windows can sometime send query file info request on
4089          * pipe without opening it, checking error condition here
4090          */
4091         id = le64_to_cpu(req->VolatileFileId);
4092         if (!ksmbd_session_rpc_method(sess, id))
4093                 return -ENOENT;
4094
4095         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4096                     req->FileInfoClass, le64_to_cpu(req->VolatileFileId));
4097
4098         switch (req->FileInfoClass) {
4099         case FILE_STANDARD_INFORMATION:
4100                 get_standard_info_pipe(rsp, rsp_org);
4101                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4102                                       rsp, rsp_org,
4103                                       FILE_STANDARD_INFORMATION_SIZE);
4104                 break;
4105         case FILE_INTERNAL_INFORMATION:
4106                 get_internal_info_pipe(rsp, id, rsp_org);
4107                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4108                                       rsp, rsp_org,
4109                                       FILE_INTERNAL_INFORMATION_SIZE);
4110                 break;
4111         default:
4112                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4113                             req->FileInfoClass);
4114                 rc = -EOPNOTSUPP;
4115         }
4116         return rc;
4117 }
4118
4119 /**
4120  * smb2_get_ea() - handler for smb2 get extended attribute command
4121  * @work:       smb work containing query info command buffer
4122  * @fp:         ksmbd_file pointer
4123  * @req:        get extended attribute request
4124  * @rsp:        response buffer pointer
4125  * @rsp_org:    base response buffer pointer in case of chained response
4126  *
4127  * Return:      0 on success, otherwise error
4128  */
4129 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4130                        struct smb2_query_info_req *req,
4131                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4132 {
4133         struct smb2_ea_info *eainfo, *prev_eainfo;
4134         char *name, *ptr, *xattr_list = NULL, *buf;
4135         int rc, name_len, value_len, xattr_list_len, idx;
4136         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4137         struct smb2_ea_info_req *ea_req = NULL;
4138         struct path *path;
4139         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4140
4141         if (!(fp->daccess & FILE_READ_EA_LE)) {
4142                 pr_err("Not permitted to read ext attr : 0x%x\n",
4143                        fp->daccess);
4144                 return -EACCES;
4145         }
4146
4147         path = &fp->filp->f_path;
4148         /* single EA entry is requested with given user.* name */
4149         if (req->InputBufferLength) {
4150                 if (le32_to_cpu(req->InputBufferLength) <
4151                     sizeof(struct smb2_ea_info_req))
4152                         return -EINVAL;
4153
4154                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4155         } else {
4156                 /* need to send all EAs, if no specific EA is requested*/
4157                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4158                         ksmbd_debug(SMB,
4159                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4160                                     le32_to_cpu(req->Flags));
4161         }
4162
4163         buf_free_len =
4164                 smb2_calc_max_out_buf_len(work, 8,
4165                                           le32_to_cpu(req->OutputBufferLength));
4166         if (buf_free_len < 0)
4167                 return -EINVAL;
4168
4169         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4170         if (rc < 0) {
4171                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4172                 goto out;
4173         } else if (!rc) { /* there is no EA in the file */
4174                 ksmbd_debug(SMB, "no ea data in the file\n");
4175                 goto done;
4176         }
4177         xattr_list_len = rc;
4178
4179         ptr = (char *)rsp->Buffer;
4180         eainfo = (struct smb2_ea_info *)ptr;
4181         prev_eainfo = eainfo;
4182         idx = 0;
4183
4184         while (idx < xattr_list_len) {
4185                 name = xattr_list + idx;
4186                 name_len = strlen(name);
4187
4188                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4189                 idx += name_len + 1;
4190
4191                 /*
4192                  * CIFS does not support EA other than user.* namespace,
4193                  * still keep the framework generic, to list other attrs
4194                  * in future.
4195                  */
4196                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4197                         continue;
4198
4199                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4200                              STREAM_PREFIX_LEN))
4201                         continue;
4202
4203                 if (req->InputBufferLength &&
4204                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4205                             ea_req->EaNameLength))
4206                         continue;
4207
4208                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4209                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4210                         continue;
4211
4212                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4213                         name_len -= XATTR_USER_PREFIX_LEN;
4214
4215                 ptr = (char *)(&eainfo->name + name_len + 1);
4216                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4217                                 name_len + 1);
4218                 /* bailout if xattr can't fit in buf_free_len */
4219                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4220                                                name, &buf);
4221                 if (value_len <= 0) {
4222                         rc = -ENOENT;
4223                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4224                         goto out;
4225                 }
4226
4227                 buf_free_len -= value_len;
4228                 if (buf_free_len < 0) {
4229                         kfree(buf);
4230                         break;
4231                 }
4232
4233                 memcpy(ptr, buf, value_len);
4234                 kfree(buf);
4235
4236                 ptr += value_len;
4237                 eainfo->Flags = 0;
4238                 eainfo->EaNameLength = name_len;
4239
4240                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4241                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4242                                name_len);
4243                 else
4244                         memcpy(eainfo->name, name, name_len);
4245
4246                 eainfo->name[name_len] = '\0';
4247                 eainfo->EaValueLength = cpu_to_le16(value_len);
4248                 next_offset = offsetof(struct smb2_ea_info, name) +
4249                         name_len + 1 + value_len;
4250
4251                 /* align next xattr entry at 4 byte bundary */
4252                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4253                 if (alignment_bytes) {
4254                         memset(ptr, '\0', alignment_bytes);
4255                         ptr += alignment_bytes;
4256                         next_offset += alignment_bytes;
4257                         buf_free_len -= alignment_bytes;
4258                 }
4259                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4260                 prev_eainfo = eainfo;
4261                 eainfo = (struct smb2_ea_info *)ptr;
4262                 rsp_data_cnt += next_offset;
4263
4264                 if (req->InputBufferLength) {
4265                         ksmbd_debug(SMB, "single entry requested\n");
4266                         break;
4267                 }
4268         }
4269
4270         /* no more ea entries */
4271         prev_eainfo->NextEntryOffset = 0;
4272 done:
4273         rc = 0;
4274         if (rsp_data_cnt == 0)
4275                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4276         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4277         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4278 out:
4279         kvfree(xattr_list);
4280         return rc;
4281 }
4282
4283 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4284                                  struct ksmbd_file *fp, void *rsp_org)
4285 {
4286         struct smb2_file_access_info *file_info;
4287
4288         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4289         file_info->AccessFlags = fp->daccess;
4290         rsp->OutputBufferLength =
4291                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4292         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4293 }
4294
4295 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4296                                struct ksmbd_file *fp, void *rsp_org)
4297 {
4298         struct smb2_file_basic_info *basic_info;
4299         struct kstat stat;
4300         u64 time;
4301
4302         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4303                 pr_err("no right to read the attributes : 0x%x\n",
4304                        fp->daccess);
4305                 return -EACCES;
4306         }
4307
4308         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4309         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4310                          &stat);
4311         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4312         time = ksmbd_UnixTimeToNT(stat.atime);
4313         basic_info->LastAccessTime = cpu_to_le64(time);
4314         time = ksmbd_UnixTimeToNT(stat.mtime);
4315         basic_info->LastWriteTime = cpu_to_le64(time);
4316         time = ksmbd_UnixTimeToNT(stat.ctime);
4317         basic_info->ChangeTime = cpu_to_le64(time);
4318         basic_info->Attributes = fp->f_ci->m_fattr;
4319         basic_info->Pad1 = 0;
4320         rsp->OutputBufferLength =
4321                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4322         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4323         return 0;
4324 }
4325
4326 static unsigned long long get_allocation_size(struct inode *inode,
4327                                               struct kstat *stat)
4328 {
4329         unsigned long long alloc_size = 0;
4330
4331         if (!S_ISDIR(stat->mode)) {
4332                 if ((inode->i_blocks << 9) <= stat->size)
4333                         alloc_size = stat->size;
4334                 else
4335                         alloc_size = inode->i_blocks << 9;
4336         }
4337
4338         return alloc_size;
4339 }
4340
4341 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4342                                    struct ksmbd_file *fp, void *rsp_org)
4343 {
4344         struct smb2_file_standard_info *sinfo;
4345         unsigned int delete_pending;
4346         struct inode *inode;
4347         struct kstat stat;
4348
4349         inode = file_inode(fp->filp);
4350         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4351
4352         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4353         delete_pending = ksmbd_inode_pending_delete(fp);
4354
4355         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4356         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4357         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4358         sinfo->DeletePending = delete_pending;
4359         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4360         rsp->OutputBufferLength =
4361                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4362         inc_rfc1001_len(rsp_org,
4363                         sizeof(struct smb2_file_standard_info));
4364 }
4365
4366 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4367                                     void *rsp_org)
4368 {
4369         struct smb2_file_alignment_info *file_info;
4370
4371         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4372         file_info->AlignmentRequirement = 0;
4373         rsp->OutputBufferLength =
4374                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4375         inc_rfc1001_len(rsp_org,
4376                         sizeof(struct smb2_file_alignment_info));
4377 }
4378
4379 static int get_file_all_info(struct ksmbd_work *work,
4380                              struct smb2_query_info_rsp *rsp,
4381                              struct ksmbd_file *fp,
4382                              void *rsp_org)
4383 {
4384         struct ksmbd_conn *conn = work->conn;
4385         struct smb2_file_all_info *file_info;
4386         unsigned int delete_pending;
4387         struct inode *inode;
4388         struct kstat stat;
4389         int conv_len;
4390         char *filename;
4391         u64 time;
4392
4393         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4394                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4395                             fp->daccess);
4396                 return -EACCES;
4397         }
4398
4399         filename = convert_to_nt_pathname(fp->filename);
4400         if (!filename)
4401                 return -ENOMEM;
4402
4403         inode = file_inode(fp->filp);
4404         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4405
4406         ksmbd_debug(SMB, "filename = %s\n", filename);
4407         delete_pending = ksmbd_inode_pending_delete(fp);
4408         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4409
4410         file_info->CreationTime = cpu_to_le64(fp->create_time);
4411         time = ksmbd_UnixTimeToNT(stat.atime);
4412         file_info->LastAccessTime = cpu_to_le64(time);
4413         time = ksmbd_UnixTimeToNT(stat.mtime);
4414         file_info->LastWriteTime = cpu_to_le64(time);
4415         time = ksmbd_UnixTimeToNT(stat.ctime);
4416         file_info->ChangeTime = cpu_to_le64(time);
4417         file_info->Attributes = fp->f_ci->m_fattr;
4418         file_info->Pad1 = 0;
4419         file_info->AllocationSize =
4420                 cpu_to_le64(get_allocation_size(inode, &stat));
4421         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4422         file_info->NumberOfLinks =
4423                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4424         file_info->DeletePending = delete_pending;
4425         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4426         file_info->Pad2 = 0;
4427         file_info->IndexNumber = cpu_to_le64(stat.ino);
4428         file_info->EASize = 0;
4429         file_info->AccessFlags = fp->daccess;
4430         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4431         file_info->Mode = fp->coption;
4432         file_info->AlignmentRequirement = 0;
4433         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4434                                      PATH_MAX, conn->local_nls, 0);
4435         conv_len *= 2;
4436         file_info->FileNameLength = cpu_to_le32(conv_len);
4437         rsp->OutputBufferLength =
4438                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4439         kfree(filename);
4440         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4441         return 0;
4442 }
4443
4444 static void get_file_alternate_info(struct ksmbd_work *work,
4445                                     struct smb2_query_info_rsp *rsp,
4446                                     struct ksmbd_file *fp,
4447                                     void *rsp_org)
4448 {
4449         struct ksmbd_conn *conn = work->conn;
4450         struct smb2_file_alt_name_info *file_info;
4451         struct dentry *dentry = fp->filp->f_path.dentry;
4452         int conv_len;
4453
4454         spin_lock(&dentry->d_lock);
4455         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4456         conv_len = ksmbd_extract_shortname(conn,
4457                                            dentry->d_name.name,
4458                                            file_info->FileName);
4459         spin_unlock(&dentry->d_lock);
4460         file_info->FileNameLength = cpu_to_le32(conv_len);
4461         rsp->OutputBufferLength =
4462                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4463         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4464 }
4465
4466 static void get_file_stream_info(struct ksmbd_work *work,
4467                                  struct smb2_query_info_rsp *rsp,
4468                                  struct ksmbd_file *fp,
4469                                  void *rsp_org)
4470 {
4471         struct ksmbd_conn *conn = work->conn;
4472         struct smb2_file_stream_info *file_info;
4473         char *stream_name, *xattr_list = NULL, *stream_buf;
4474         struct kstat stat;
4475         struct path *path = &fp->filp->f_path;
4476         ssize_t xattr_list_len;
4477         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4478         int buf_free_len;
4479         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4480
4481         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4482                          &stat);
4483         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4484
4485         buf_free_len =
4486                 smb2_calc_max_out_buf_len(work, 8,
4487                                           le32_to_cpu(req->OutputBufferLength));
4488         if (buf_free_len < 0)
4489                 goto out;
4490
4491         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4492         if (xattr_list_len < 0) {
4493                 goto out;
4494         } else if (!xattr_list_len) {
4495                 ksmbd_debug(SMB, "empty xattr in the file\n");
4496                 goto out;
4497         }
4498
4499         while (idx < xattr_list_len) {
4500                 stream_name = xattr_list + idx;
4501                 streamlen = strlen(stream_name);
4502                 idx += streamlen + 1;
4503
4504                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4505
4506                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4507                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4508                         continue;
4509
4510                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4511                                 STREAM_PREFIX_LEN);
4512                 streamlen = stream_name_len;
4513
4514                 /* plus : size */
4515                 streamlen += 1;
4516                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4517                 if (!stream_buf)
4518                         break;
4519
4520                 streamlen = snprintf(stream_buf, streamlen + 1,
4521                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4522
4523                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4524                 if (next > buf_free_len) {
4525                         kfree(stream_buf);
4526                         break;
4527                 }
4528
4529                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4530                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4531                                                stream_buf, streamlen,
4532                                                conn->local_nls, 0);
4533                 streamlen *= 2;
4534                 kfree(stream_buf);
4535                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4536                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4537                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4538
4539                 nbytes += next;
4540                 buf_free_len -= next;
4541                 file_info->NextEntryOffset = cpu_to_le32(next);
4542         }
4543
4544 out:
4545         if (!S_ISDIR(stat.mode) &&
4546             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4547                 file_info = (struct smb2_file_stream_info *)
4548                         &rsp->Buffer[nbytes];
4549                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4550                                               "::$DATA", 7, conn->local_nls, 0);
4551                 streamlen *= 2;
4552                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4553                 file_info->StreamSize = cpu_to_le64(stat.size);
4554                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4555                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4556         }
4557
4558         /* last entry offset should be 0 */
4559         file_info->NextEntryOffset = 0;
4560         kvfree(xattr_list);
4561
4562         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4563         inc_rfc1001_len(rsp_org, nbytes);
4564 }
4565
4566 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4567                                    struct ksmbd_file *fp, void *rsp_org)
4568 {
4569         struct smb2_file_internal_info *file_info;
4570         struct kstat stat;
4571
4572         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4573                          &stat);
4574         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4575         file_info->IndexNumber = cpu_to_le64(stat.ino);
4576         rsp->OutputBufferLength =
4577                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4578         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4579 }
4580
4581 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4582                                       struct ksmbd_file *fp, void *rsp_org)
4583 {
4584         struct smb2_file_ntwrk_info *file_info;
4585         struct inode *inode;
4586         struct kstat stat;
4587         u64 time;
4588
4589         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4590                 pr_err("no right to read the attributes : 0x%x\n",
4591                        fp->daccess);
4592                 return -EACCES;
4593         }
4594
4595         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4596
4597         inode = file_inode(fp->filp);
4598         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4599
4600         file_info->CreationTime = cpu_to_le64(fp->create_time);
4601         time = ksmbd_UnixTimeToNT(stat.atime);
4602         file_info->LastAccessTime = cpu_to_le64(time);
4603         time = ksmbd_UnixTimeToNT(stat.mtime);
4604         file_info->LastWriteTime = cpu_to_le64(time);
4605         time = ksmbd_UnixTimeToNT(stat.ctime);
4606         file_info->ChangeTime = cpu_to_le64(time);
4607         file_info->Attributes = fp->f_ci->m_fattr;
4608         file_info->AllocationSize =
4609                 cpu_to_le64(get_allocation_size(inode, &stat));
4610         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4611         file_info->Reserved = cpu_to_le32(0);
4612         rsp->OutputBufferLength =
4613                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4614         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4615         return 0;
4616 }
4617
4618 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4619 {
4620         struct smb2_file_ea_info *file_info;
4621
4622         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4623         file_info->EASize = 0;
4624         rsp->OutputBufferLength =
4625                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4626         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4627 }
4628
4629 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4630                                    struct ksmbd_file *fp, void *rsp_org)
4631 {
4632         struct smb2_file_pos_info *file_info;
4633
4634         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4635         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4636         rsp->OutputBufferLength =
4637                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4638         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4639 }
4640
4641 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4642                                struct ksmbd_file *fp, void *rsp_org)
4643 {
4644         struct smb2_file_mode_info *file_info;
4645
4646         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4647         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4648         rsp->OutputBufferLength =
4649                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4650         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4651 }
4652
4653 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4654                                       struct ksmbd_file *fp, void *rsp_org)
4655 {
4656         struct smb2_file_comp_info *file_info;
4657         struct kstat stat;
4658
4659         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4660                          &stat);
4661
4662         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4663         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4664         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4665         file_info->CompressionUnitShift = 0;
4666         file_info->ChunkShift = 0;
4667         file_info->ClusterShift = 0;
4668         memset(&file_info->Reserved[0], 0, 3);
4669
4670         rsp->OutputBufferLength =
4671                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4672         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4673 }
4674
4675 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4676                                        struct ksmbd_file *fp, void *rsp_org)
4677 {
4678         struct smb2_file_attr_tag_info *file_info;
4679
4680         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4681                 pr_err("no right to read the attributes : 0x%x\n",
4682                        fp->daccess);
4683                 return -EACCES;
4684         }
4685
4686         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4687         file_info->FileAttributes = fp->f_ci->m_fattr;
4688         file_info->ReparseTag = 0;
4689         rsp->OutputBufferLength =
4690                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4691         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4692         return 0;
4693 }
4694
4695 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4696                                 struct ksmbd_file *fp, void *rsp_org)
4697 {
4698         struct smb311_posix_qinfo *file_info;
4699         struct inode *inode = file_inode(fp->filp);
4700         u64 time;
4701
4702         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4703         file_info->CreationTime = cpu_to_le64(fp->create_time);
4704         time = ksmbd_UnixTimeToNT(inode->i_atime);
4705         file_info->LastAccessTime = cpu_to_le64(time);
4706         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4707         file_info->LastWriteTime = cpu_to_le64(time);
4708         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4709         file_info->ChangeTime = cpu_to_le64(time);
4710         file_info->DosAttributes = fp->f_ci->m_fattr;
4711         file_info->Inode = cpu_to_le64(inode->i_ino);
4712         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4713         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4714         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4715         file_info->Mode = cpu_to_le32(inode->i_mode);
4716         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4717         rsp->OutputBufferLength =
4718                 cpu_to_le32(sizeof(struct smb311_posix_qinfo));
4719         inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
4720         return 0;
4721 }
4722
4723 static int smb2_get_info_file(struct ksmbd_work *work,
4724                               struct smb2_query_info_req *req,
4725                               struct smb2_query_info_rsp *rsp)
4726 {
4727         struct ksmbd_file *fp;
4728         int fileinfoclass = 0;
4729         int rc = 0;
4730         int file_infoclass_size;
4731         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4732
4733         if (test_share_config_flag(work->tcon->share_conf,
4734                                    KSMBD_SHARE_FLAG_PIPE)) {
4735                 /* smb2 info file called for pipe */
4736                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4737                                                work->response_buf);
4738         }
4739
4740         if (work->next_smb2_rcv_hdr_off) {
4741                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
4742                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4743                                     work->compound_fid);
4744                         id = work->compound_fid;
4745                         pid = work->compound_pfid;
4746                 }
4747         }
4748
4749         if (!has_file_id(id)) {
4750                 id = le64_to_cpu(req->VolatileFileId);
4751                 pid = le64_to_cpu(req->PersistentFileId);
4752         }
4753
4754         fp = ksmbd_lookup_fd_slow(work, id, pid);
4755         if (!fp)
4756                 return -ENOENT;
4757
4758         fileinfoclass = req->FileInfoClass;
4759
4760         switch (fileinfoclass) {
4761         case FILE_ACCESS_INFORMATION:
4762                 get_file_access_info(rsp, fp, work->response_buf);
4763                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4764                 break;
4765
4766         case FILE_BASIC_INFORMATION:
4767                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4768                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4769                 break;
4770
4771         case FILE_STANDARD_INFORMATION:
4772                 get_file_standard_info(rsp, fp, work->response_buf);
4773                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4774                 break;
4775
4776         case FILE_ALIGNMENT_INFORMATION:
4777                 get_file_alignment_info(rsp, work->response_buf);
4778                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4779                 break;
4780
4781         case FILE_ALL_INFORMATION:
4782                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4783                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4784                 break;
4785
4786         case FILE_ALTERNATE_NAME_INFORMATION:
4787                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4788                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4789                 break;
4790
4791         case FILE_STREAM_INFORMATION:
4792                 get_file_stream_info(work, rsp, fp, work->response_buf);
4793                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4794                 break;
4795
4796         case FILE_INTERNAL_INFORMATION:
4797                 get_file_internal_info(rsp, fp, work->response_buf);
4798                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4799                 break;
4800
4801         case FILE_NETWORK_OPEN_INFORMATION:
4802                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4803                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4804                 break;
4805
4806         case FILE_EA_INFORMATION:
4807                 get_file_ea_info(rsp, work->response_buf);
4808                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4809                 break;
4810
4811         case FILE_FULL_EA_INFORMATION:
4812                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4813                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4814                 break;
4815
4816         case FILE_POSITION_INFORMATION:
4817                 get_file_position_info(rsp, fp, work->response_buf);
4818                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4819                 break;
4820
4821         case FILE_MODE_INFORMATION:
4822                 get_file_mode_info(rsp, fp, work->response_buf);
4823                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4824                 break;
4825
4826         case FILE_COMPRESSION_INFORMATION:
4827                 get_file_compression_info(rsp, fp, work->response_buf);
4828                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4829                 break;
4830
4831         case FILE_ATTRIBUTE_TAG_INFORMATION:
4832                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4833                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4834                 break;
4835         case SMB_FIND_FILE_POSIX_INFO:
4836                 if (!work->tcon->posix_extensions) {
4837                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4838                         rc = -EOPNOTSUPP;
4839                 } else {
4840                         rc = find_file_posix_info(rsp, fp, work->response_buf);
4841                         file_infoclass_size = sizeof(struct smb311_posix_qinfo);
4842                 }
4843                 break;
4844         default:
4845                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4846                             fileinfoclass);
4847                 rc = -EOPNOTSUPP;
4848         }
4849         if (!rc)
4850                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4851                                       rsp, work->response_buf,
4852                                       file_infoclass_size);
4853         ksmbd_fd_put(work, fp);
4854         return rc;
4855 }
4856
4857 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4858                                     struct smb2_query_info_req *req,
4859                                     struct smb2_query_info_rsp *rsp)
4860 {
4861         struct ksmbd_session *sess = work->sess;
4862         struct ksmbd_conn *conn = sess->conn;
4863         struct ksmbd_share_config *share = work->tcon->share_conf;
4864         int fsinfoclass = 0;
4865         struct kstatfs stfs;
4866         struct path path;
4867         int rc = 0, len;
4868         int fs_infoclass_size = 0;
4869
4870         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4871         if (rc) {
4872                 pr_err("cannot create vfs path\n");
4873                 return -EIO;
4874         }
4875
4876         rc = vfs_statfs(&path, &stfs);
4877         if (rc) {
4878                 pr_err("cannot do stat of path %s\n", share->path);
4879                 path_put(&path);
4880                 return -EIO;
4881         }
4882
4883         fsinfoclass = req->FileInfoClass;
4884
4885         switch (fsinfoclass) {
4886         case FS_DEVICE_INFORMATION:
4887         {
4888                 struct filesystem_device_info *info;
4889
4890                 info = (struct filesystem_device_info *)rsp->Buffer;
4891
4892                 info->DeviceType = cpu_to_le32(stfs.f_type);
4893                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4894                 rsp->OutputBufferLength = cpu_to_le32(8);
4895                 inc_rfc1001_len(work->response_buf, 8);
4896                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4897                 break;
4898         }
4899         case FS_ATTRIBUTE_INFORMATION:
4900         {
4901                 struct filesystem_attribute_info *info;
4902                 size_t sz;
4903
4904                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4905                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4906                                                FILE_PERSISTENT_ACLS |
4907                                                FILE_UNICODE_ON_DISK |
4908                                                FILE_CASE_PRESERVED_NAMES |
4909                                                FILE_CASE_SENSITIVE_SEARCH |
4910                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4911
4912                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4913
4914                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4915                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4916                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4917                 len = len * 2;
4918                 info->FileSystemNameLen = cpu_to_le32(len);
4919                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4920                 rsp->OutputBufferLength = cpu_to_le32(sz);
4921                 inc_rfc1001_len(work->response_buf, sz);
4922                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4923                 break;
4924         }
4925         case FS_VOLUME_INFORMATION:
4926         {
4927                 struct filesystem_vol_info *info;
4928                 size_t sz;
4929                 unsigned int serial_crc = 0;
4930
4931                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4932                 info->VolumeCreationTime = 0;
4933                 serial_crc = crc32_le(serial_crc, share->name,
4934                                       strlen(share->name));
4935                 serial_crc = crc32_le(serial_crc, share->path,
4936                                       strlen(share->path));
4937                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
4938                                       strlen(ksmbd_netbios_name()));
4939                 /* Taking dummy value of serial number*/
4940                 info->SerialNumber = cpu_to_le32(serial_crc);
4941                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4942                                         share->name, PATH_MAX,
4943                                         conn->local_nls, 0);
4944                 len = len * 2;
4945                 info->VolumeLabelSize = cpu_to_le32(len);
4946                 info->Reserved = 0;
4947                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4948                 rsp->OutputBufferLength = cpu_to_le32(sz);
4949                 inc_rfc1001_len(work->response_buf, sz);
4950                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4951                 break;
4952         }
4953         case FS_SIZE_INFORMATION:
4954         {
4955                 struct filesystem_info *info;
4956
4957                 info = (struct filesystem_info *)(rsp->Buffer);
4958                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4959                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4960                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4961                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4962                 rsp->OutputBufferLength = cpu_to_le32(24);
4963                 inc_rfc1001_len(work->response_buf, 24);
4964                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
4965                 break;
4966         }
4967         case FS_FULL_SIZE_INFORMATION:
4968         {
4969                 struct smb2_fs_full_size_info *info;
4970
4971                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
4972                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4973                 info->CallerAvailableAllocationUnits =
4974                                         cpu_to_le64(stfs.f_bavail);
4975                 info->ActualAvailableAllocationUnits =
4976                                         cpu_to_le64(stfs.f_bfree);
4977                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4978                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4979                 rsp->OutputBufferLength = cpu_to_le32(32);
4980                 inc_rfc1001_len(work->response_buf, 32);
4981                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
4982                 break;
4983         }
4984         case FS_OBJECT_ID_INFORMATION:
4985         {
4986                 struct object_id_info *info;
4987
4988                 info = (struct object_id_info *)(rsp->Buffer);
4989
4990                 if (!user_guest(sess->user))
4991                         memcpy(info->objid, user_passkey(sess->user), 16);
4992                 else
4993                         memset(info->objid, 0, 16);
4994
4995                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
4996                 info->extended_info.version = cpu_to_le32(1);
4997                 info->extended_info.release = cpu_to_le32(1);
4998                 info->extended_info.rel_date = 0;
4999                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5000                 rsp->OutputBufferLength = cpu_to_le32(64);
5001                 inc_rfc1001_len(work->response_buf, 64);
5002                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
5003                 break;
5004         }
5005         case FS_SECTOR_SIZE_INFORMATION:
5006         {
5007                 struct smb3_fs_ss_info *info;
5008
5009                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5010
5011                 info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
5012                 info->PhysicalBytesPerSectorForAtomicity =
5013                                 cpu_to_le32(stfs.f_bsize);
5014                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
5015                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5016                                 cpu_to_le32(stfs.f_bsize);
5017                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5018                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5019                 info->ByteOffsetForSectorAlignment = 0;
5020                 info->ByteOffsetForPartitionAlignment = 0;
5021                 rsp->OutputBufferLength = cpu_to_le32(28);
5022                 inc_rfc1001_len(work->response_buf, 28);
5023                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
5024                 break;
5025         }
5026         case FS_CONTROL_INFORMATION:
5027         {
5028                 /*
5029                  * TODO : The current implementation is based on
5030                  * test result with win7(NTFS) server. It's need to
5031                  * modify this to get valid Quota values
5032                  * from Linux kernel
5033                  */
5034                 struct smb2_fs_control_info *info;
5035
5036                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5037                 info->FreeSpaceStartFiltering = 0;
5038                 info->FreeSpaceThreshold = 0;
5039                 info->FreeSpaceStopFiltering = 0;
5040                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5041                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5042                 info->Padding = 0;
5043                 rsp->OutputBufferLength = cpu_to_le32(48);
5044                 inc_rfc1001_len(work->response_buf, 48);
5045                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5046                 break;
5047         }
5048         case FS_POSIX_INFORMATION:
5049         {
5050                 struct filesystem_posix_info *info;
5051
5052                 if (!work->tcon->posix_extensions) {
5053                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5054                         rc = -EOPNOTSUPP;
5055                 } else {
5056                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5057                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5058                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5059                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5060                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5061                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5062                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5063                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5064                         rsp->OutputBufferLength = cpu_to_le32(56);
5065                         inc_rfc1001_len(work->response_buf, 56);
5066                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5067                 }
5068                 break;
5069         }
5070         default:
5071                 path_put(&path);
5072                 return -EOPNOTSUPP;
5073         }
5074         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5075                               rsp, work->response_buf,
5076                               fs_infoclass_size);
5077         path_put(&path);
5078         return rc;
5079 }
5080
5081 static int smb2_get_info_sec(struct ksmbd_work *work,
5082                              struct smb2_query_info_req *req,
5083                              struct smb2_query_info_rsp *rsp)
5084 {
5085         struct ksmbd_file *fp;
5086         struct user_namespace *user_ns;
5087         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5088         struct smb_fattr fattr = {{0}};
5089         struct inode *inode;
5090         __u32 secdesclen;
5091         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5092         int addition_info = le32_to_cpu(req->AdditionalInformation);
5093         int rc;
5094
5095         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5096                               PROTECTED_DACL_SECINFO |
5097                               UNPROTECTED_DACL_SECINFO)) {
5098                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5099                        addition_info);
5100
5101                 pntsd->revision = cpu_to_le16(1);
5102                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5103                 pntsd->osidoffset = 0;
5104                 pntsd->gsidoffset = 0;
5105                 pntsd->sacloffset = 0;
5106                 pntsd->dacloffset = 0;
5107
5108                 secdesclen = sizeof(struct smb_ntsd);
5109                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5110                 inc_rfc1001_len(work->response_buf, secdesclen);
5111
5112                 return 0;
5113         }
5114
5115         if (work->next_smb2_rcv_hdr_off) {
5116                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5117                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5118                                     work->compound_fid);
5119                         id = work->compound_fid;
5120                         pid = work->compound_pfid;
5121                 }
5122         }
5123
5124         if (!has_file_id(id)) {
5125                 id = le64_to_cpu(req->VolatileFileId);
5126                 pid = le64_to_cpu(req->PersistentFileId);
5127         }
5128
5129         fp = ksmbd_lookup_fd_slow(work, id, pid);
5130         if (!fp)
5131                 return -ENOENT;
5132
5133         user_ns = file_mnt_user_ns(fp->filp);
5134         inode = file_inode(fp->filp);
5135         ksmbd_acls_fattr(&fattr, user_ns, inode);
5136
5137         if (test_share_config_flag(work->tcon->share_conf,
5138                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5139                 ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5140                                        fp->filp->f_path.dentry, &ppntsd);
5141
5142         rc = build_sec_desc(user_ns, pntsd, ppntsd, addition_info,
5143                             &secdesclen, &fattr);
5144         posix_acl_release(fattr.cf_acls);
5145         posix_acl_release(fattr.cf_dacls);
5146         kfree(ppntsd);
5147         ksmbd_fd_put(work, fp);
5148         if (rc)
5149                 return rc;
5150
5151         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5152         inc_rfc1001_len(work->response_buf, secdesclen);
5153         return 0;
5154 }
5155
5156 /**
5157  * smb2_query_info() - handler for smb2 query info command
5158  * @work:       smb work containing query info request buffer
5159  *
5160  * Return:      0 on success, otherwise error
5161  */
5162 int smb2_query_info(struct ksmbd_work *work)
5163 {
5164         struct smb2_query_info_req *req;
5165         struct smb2_query_info_rsp *rsp;
5166         int rc = 0;
5167
5168         WORK_BUFFERS(work, req, rsp);
5169
5170         ksmbd_debug(SMB, "GOT query info request\n");
5171
5172         switch (req->InfoType) {
5173         case SMB2_O_INFO_FILE:
5174                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5175                 rc = smb2_get_info_file(work, req, rsp);
5176                 break;
5177         case SMB2_O_INFO_FILESYSTEM:
5178                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5179                 rc = smb2_get_info_filesystem(work, req, rsp);
5180                 break;
5181         case SMB2_O_INFO_SECURITY:
5182                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5183                 rc = smb2_get_info_sec(work, req, rsp);
5184                 break;
5185         default:
5186                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5187                             req->InfoType);
5188                 rc = -EOPNOTSUPP;
5189         }
5190
5191         if (rc < 0) {
5192                 if (rc == -EACCES)
5193                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5194                 else if (rc == -ENOENT)
5195                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5196                 else if (rc == -EIO)
5197                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5198                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5199                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5200                 smb2_set_err_rsp(work);
5201
5202                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5203                             rc);
5204                 return rc;
5205         }
5206         rsp->StructureSize = cpu_to_le16(9);
5207         rsp->OutputBufferOffset = cpu_to_le16(72);
5208         inc_rfc1001_len(work->response_buf, 8);
5209         return 0;
5210 }
5211
5212 /**
5213  * smb2_close_pipe() - handler for closing IPC pipe
5214  * @work:       smb work containing close request buffer
5215  *
5216  * Return:      0
5217  */
5218 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5219 {
5220         u64 id;
5221         struct smb2_close_req *req = smb2_get_msg(work->request_buf);
5222         struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
5223
5224         id = le64_to_cpu(req->VolatileFileId);
5225         ksmbd_session_rpc_close(work->sess, id);
5226
5227         rsp->StructureSize = cpu_to_le16(60);
5228         rsp->Flags = 0;
5229         rsp->Reserved = 0;
5230         rsp->CreationTime = 0;
5231         rsp->LastAccessTime = 0;
5232         rsp->LastWriteTime = 0;
5233         rsp->ChangeTime = 0;
5234         rsp->AllocationSize = 0;
5235         rsp->EndOfFile = 0;
5236         rsp->Attributes = 0;
5237         inc_rfc1001_len(work->response_buf, 60);
5238         return 0;
5239 }
5240
5241 /**
5242  * smb2_close() - handler for smb2 close file command
5243  * @work:       smb work containing close request buffer
5244  *
5245  * Return:      0
5246  */
5247 int smb2_close(struct ksmbd_work *work)
5248 {
5249         u64 volatile_id = KSMBD_NO_FID;
5250         u64 sess_id;
5251         struct smb2_close_req *req;
5252         struct smb2_close_rsp *rsp;
5253         struct ksmbd_conn *conn = work->conn;
5254         struct ksmbd_file *fp;
5255         struct inode *inode;
5256         u64 time;
5257         int err = 0;
5258
5259         WORK_BUFFERS(work, req, rsp);
5260
5261         if (test_share_config_flag(work->tcon->share_conf,
5262                                    KSMBD_SHARE_FLAG_PIPE)) {
5263                 ksmbd_debug(SMB, "IPC pipe close request\n");
5264                 return smb2_close_pipe(work);
5265         }
5266
5267         sess_id = le64_to_cpu(req->hdr.SessionId);
5268         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5269                 sess_id = work->compound_sid;
5270
5271         work->compound_sid = 0;
5272         if (check_session_id(conn, sess_id)) {
5273                 work->compound_sid = sess_id;
5274         } else {
5275                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5276                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5277                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5278                 err = -EBADF;
5279                 goto out;
5280         }
5281
5282         if (work->next_smb2_rcv_hdr_off &&
5283             !has_file_id(le64_to_cpu(req->VolatileFileId))) {
5284                 if (!has_file_id(work->compound_fid)) {
5285                         /* file already closed, return FILE_CLOSED */
5286                         ksmbd_debug(SMB, "file already closed\n");
5287                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5288                         err = -EBADF;
5289                         goto out;
5290                 } else {
5291                         ksmbd_debug(SMB,
5292                                     "Compound request set FID = %llu:%llu\n",
5293                                     work->compound_fid,
5294                                     work->compound_pfid);
5295                         volatile_id = work->compound_fid;
5296
5297                         /* file closed, stored id is not valid anymore */
5298                         work->compound_fid = KSMBD_NO_FID;
5299                         work->compound_pfid = KSMBD_NO_FID;
5300                 }
5301         } else {
5302                 volatile_id = le64_to_cpu(req->VolatileFileId);
5303         }
5304         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5305
5306         rsp->StructureSize = cpu_to_le16(60);
5307         rsp->Reserved = 0;
5308
5309         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5310                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5311                 if (!fp) {
5312                         err = -ENOENT;
5313                         goto out;
5314                 }
5315
5316                 inode = file_inode(fp->filp);
5317                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5318                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5319                         cpu_to_le64(inode->i_blocks << 9);
5320                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5321                 rsp->Attributes = fp->f_ci->m_fattr;
5322                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5323                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5324                 rsp->LastAccessTime = cpu_to_le64(time);
5325                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5326                 rsp->LastWriteTime = cpu_to_le64(time);
5327                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5328                 rsp->ChangeTime = cpu_to_le64(time);
5329                 ksmbd_fd_put(work, fp);
5330         } else {
5331                 rsp->Flags = 0;
5332                 rsp->AllocationSize = 0;
5333                 rsp->EndOfFile = 0;
5334                 rsp->Attributes = 0;
5335                 rsp->CreationTime = 0;
5336                 rsp->LastAccessTime = 0;
5337                 rsp->LastWriteTime = 0;
5338                 rsp->ChangeTime = 0;
5339         }
5340
5341         err = ksmbd_close_fd(work, volatile_id);
5342 out:
5343         if (err) {
5344                 if (rsp->hdr.Status == 0)
5345                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5346                 smb2_set_err_rsp(work);
5347         } else {
5348                 inc_rfc1001_len(work->response_buf, 60);
5349         }
5350
5351         return 0;
5352 }
5353
5354 /**
5355  * smb2_echo() - handler for smb2 echo(ping) command
5356  * @work:       smb work containing echo request buffer
5357  *
5358  * Return:      0
5359  */
5360 int smb2_echo(struct ksmbd_work *work)
5361 {
5362         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5363
5364         rsp->StructureSize = cpu_to_le16(4);
5365         rsp->Reserved = 0;
5366         inc_rfc1001_len(work->response_buf, 4);
5367         return 0;
5368 }
5369
5370 static int smb2_rename(struct ksmbd_work *work,
5371                        struct ksmbd_file *fp,
5372                        struct user_namespace *user_ns,
5373                        struct smb2_file_rename_info *file_info,
5374                        struct nls_table *local_nls)
5375 {
5376         struct ksmbd_share_config *share = fp->tcon->share_conf;
5377         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5378         char *pathname = NULL;
5379         struct path path;
5380         bool file_present = true;
5381         int rc;
5382
5383         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5384         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5385         if (!pathname)
5386                 return -ENOMEM;
5387
5388         abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
5389         if (IS_ERR(abs_oldname)) {
5390                 rc = -EINVAL;
5391                 goto out;
5392         }
5393         old_name = strrchr(abs_oldname, '/');
5394         if (old_name && old_name[1] != '\0') {
5395                 old_name++;
5396         } else {
5397                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5398                             abs_oldname);
5399                 rc = -ENOENT;
5400                 goto out;
5401         }
5402
5403         new_name = smb2_get_name(file_info->FileName,
5404                                  le32_to_cpu(file_info->FileNameLength),
5405                                  local_nls);
5406         if (IS_ERR(new_name)) {
5407                 rc = PTR_ERR(new_name);
5408                 goto out;
5409         }
5410
5411         if (strchr(new_name, ':')) {
5412                 int s_type;
5413                 char *xattr_stream_name, *stream_name = NULL;
5414                 size_t xattr_stream_size;
5415                 int len;
5416
5417                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5418                 if (rc < 0)
5419                         goto out;
5420
5421                 len = strlen(new_name);
5422                 if (len > 0 && new_name[len - 1] != '/') {
5423                         pr_err("not allow base filename in rename\n");
5424                         rc = -ESHARE;
5425                         goto out;
5426                 }
5427
5428                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5429                                                  &xattr_stream_name,
5430                                                  &xattr_stream_size,
5431                                                  s_type);
5432                 if (rc)
5433                         goto out;
5434
5435                 rc = ksmbd_vfs_setxattr(user_ns,
5436                                         fp->filp->f_path.dentry,
5437                                         xattr_stream_name,
5438                                         NULL, 0, 0);
5439                 if (rc < 0) {
5440                         pr_err("failed to store stream name in xattr: %d\n",
5441                                rc);
5442                         rc = -EINVAL;
5443                         goto out;
5444                 }
5445
5446                 goto out;
5447         }
5448
5449         ksmbd_debug(SMB, "new name %s\n", new_name);
5450         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5451         if (rc) {
5452                 if (rc != -ENOENT)
5453                         goto out;
5454                 file_present = false;
5455         } else {
5456                 path_put(&path);
5457         }
5458
5459         if (ksmbd_share_veto_filename(share, new_name)) {
5460                 rc = -ENOENT;
5461                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5462                 goto out;
5463         }
5464
5465         if (file_info->ReplaceIfExists) {
5466                 if (file_present) {
5467                         rc = ksmbd_vfs_remove_file(work, new_name);
5468                         if (rc) {
5469                                 if (rc != -ENOTEMPTY)
5470                                         rc = -EINVAL;
5471                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5472                                             new_name, rc);
5473                                 goto out;
5474                         }
5475                 }
5476         } else {
5477                 if (file_present &&
5478                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5479                         rc = -EEXIST;
5480                         ksmbd_debug(SMB,
5481                                     "cannot rename already existing file\n");
5482                         goto out;
5483                 }
5484         }
5485
5486         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5487 out:
5488         kfree(pathname);
5489         if (!IS_ERR(new_name))
5490                 kfree(new_name);
5491         return rc;
5492 }
5493
5494 static int smb2_create_link(struct ksmbd_work *work,
5495                             struct ksmbd_share_config *share,
5496                             struct smb2_file_link_info *file_info,
5497                             unsigned int buf_len, struct file *filp,
5498                             struct nls_table *local_nls)
5499 {
5500         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5501         struct path path;
5502         bool file_present = true;
5503         int rc;
5504
5505         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5506                         le32_to_cpu(file_info->FileNameLength))
5507                 return -EINVAL;
5508
5509         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5510         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5511         if (!pathname)
5512                 return -ENOMEM;
5513
5514         link_name = smb2_get_name(file_info->FileName,
5515                                   le32_to_cpu(file_info->FileNameLength),
5516                                   local_nls);
5517         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5518                 rc = -EINVAL;
5519                 goto out;
5520         }
5521
5522         ksmbd_debug(SMB, "link name is %s\n", link_name);
5523         target_name = d_path(&filp->f_path, pathname, PATH_MAX);
5524         if (IS_ERR(target_name)) {
5525                 rc = -EINVAL;
5526                 goto out;
5527         }
5528
5529         ksmbd_debug(SMB, "target name is %s\n", target_name);
5530         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5531         if (rc) {
5532                 if (rc != -ENOENT)
5533                         goto out;
5534                 file_present = false;
5535         } else {
5536                 path_put(&path);
5537         }
5538
5539         if (file_info->ReplaceIfExists) {
5540                 if (file_present) {
5541                         rc = ksmbd_vfs_remove_file(work, link_name);
5542                         if (rc) {
5543                                 rc = -EINVAL;
5544                                 ksmbd_debug(SMB, "cannot delete %s\n",
5545                                             link_name);
5546                                 goto out;
5547                         }
5548                 }
5549         } else {
5550                 if (file_present) {
5551                         rc = -EEXIST;
5552                         ksmbd_debug(SMB, "link already exists\n");
5553                         goto out;
5554                 }
5555         }
5556
5557         rc = ksmbd_vfs_link(work, target_name, link_name);
5558         if (rc)
5559                 rc = -EINVAL;
5560 out:
5561         if (!IS_ERR(link_name))
5562                 kfree(link_name);
5563         kfree(pathname);
5564         return rc;
5565 }
5566
5567 static int set_file_basic_info(struct ksmbd_file *fp,
5568                                struct smb2_file_basic_info *file_info,
5569                                struct ksmbd_share_config *share)
5570 {
5571         struct iattr attrs;
5572         struct file *filp;
5573         struct inode *inode;
5574         struct user_namespace *user_ns;
5575         int rc = 0;
5576
5577         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5578                 return -EACCES;
5579
5580         attrs.ia_valid = 0;
5581         filp = fp->filp;
5582         inode = file_inode(filp);
5583         user_ns = file_mnt_user_ns(filp);
5584
5585         if (file_info->CreationTime)
5586                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5587
5588         if (file_info->LastAccessTime) {
5589                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5590                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5591         }
5592
5593         attrs.ia_valid |= ATTR_CTIME;
5594         if (file_info->ChangeTime)
5595                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5596         else
5597                 attrs.ia_ctime = inode->i_ctime;
5598
5599         if (file_info->LastWriteTime) {
5600                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5601                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5602         }
5603
5604         if (file_info->Attributes) {
5605                 if (!S_ISDIR(inode->i_mode) &&
5606                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5607                         pr_err("can't change a file to a directory\n");
5608                         return -EINVAL;
5609                 }
5610
5611                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5612                         fp->f_ci->m_fattr = file_info->Attributes |
5613                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5614         }
5615
5616         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5617             (file_info->CreationTime || file_info->Attributes)) {
5618                 struct xattr_dos_attrib da = {0};
5619
5620                 da.version = 4;
5621                 da.itime = fp->itime;
5622                 da.create_time = fp->create_time;
5623                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5624                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5625                         XATTR_DOSINFO_ITIME;
5626
5627                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5628                                                     filp->f_path.dentry, &da);
5629                 if (rc)
5630                         ksmbd_debug(SMB,
5631                                     "failed to restore file attribute in EA\n");
5632                 rc = 0;
5633         }
5634
5635         if (attrs.ia_valid) {
5636                 struct dentry *dentry = filp->f_path.dentry;
5637                 struct inode *inode = d_inode(dentry);
5638
5639                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5640                         return -EACCES;
5641
5642                 inode_lock(inode);
5643                 inode->i_ctime = attrs.ia_ctime;
5644                 attrs.ia_valid &= ~ATTR_CTIME;
5645                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5646                 inode_unlock(inode);
5647         }
5648         return rc;
5649 }
5650
5651 static int set_file_allocation_info(struct ksmbd_work *work,
5652                                     struct ksmbd_file *fp,
5653                                     struct smb2_file_alloc_info *file_alloc_info)
5654 {
5655         /*
5656          * TODO : It's working fine only when store dos attributes
5657          * is not yes. need to implement a logic which works
5658          * properly with any smb.conf option
5659          */
5660
5661         loff_t alloc_blks;
5662         struct inode *inode;
5663         int rc;
5664
5665         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5666                 return -EACCES;
5667
5668         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5669         inode = file_inode(fp->filp);
5670
5671         if (alloc_blks > inode->i_blocks) {
5672                 smb_break_all_levII_oplock(work, fp, 1);
5673                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5674                                    alloc_blks * 512);
5675                 if (rc && rc != -EOPNOTSUPP) {
5676                         pr_err("vfs_fallocate is failed : %d\n", rc);
5677                         return rc;
5678                 }
5679         } else if (alloc_blks < inode->i_blocks) {
5680                 loff_t size;
5681
5682                 /*
5683                  * Allocation size could be smaller than original one
5684                  * which means allocated blocks in file should be
5685                  * deallocated. use truncate to cut out it, but inode
5686                  * size is also updated with truncate offset.
5687                  * inode size is retained by backup inode size.
5688                  */
5689                 size = i_size_read(inode);
5690                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5691                 if (rc) {
5692                         pr_err("truncate failed! filename : %s, err %d\n",
5693                                fp->filename, rc);
5694                         return rc;
5695                 }
5696                 if (size < alloc_blks * 512)
5697                         i_size_write(inode, size);
5698         }
5699         return 0;
5700 }
5701
5702 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5703                                 struct smb2_file_eof_info *file_eof_info)
5704 {
5705         loff_t newsize;
5706         struct inode *inode;
5707         int rc;
5708
5709         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5710                 return -EACCES;
5711
5712         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5713         inode = file_inode(fp->filp);
5714
5715         /*
5716          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5717          * on FAT32 shared device, truncate execution time is too long
5718          * and network error could cause from windows client. because
5719          * truncate of some filesystem like FAT32 fill zero data in
5720          * truncated range.
5721          */
5722         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5723                 ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
5724                             fp->filename, newsize);
5725                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5726                 if (rc) {
5727                         ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
5728                                     fp->filename, rc);
5729                         if (rc != -EAGAIN)
5730                                 rc = -EBADF;
5731                         return rc;
5732                 }
5733         }
5734         return 0;
5735 }
5736
5737 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5738                            struct smb2_file_rename_info *rename_info,
5739                            unsigned int buf_len)
5740 {
5741         struct user_namespace *user_ns;
5742         struct ksmbd_file *parent_fp;
5743         struct dentry *parent;
5744         struct dentry *dentry = fp->filp->f_path.dentry;
5745         int ret;
5746
5747         if (!(fp->daccess & FILE_DELETE_LE)) {
5748                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5749                 return -EACCES;
5750         }
5751
5752         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5753                         le32_to_cpu(rename_info->FileNameLength))
5754                 return -EINVAL;
5755
5756         user_ns = file_mnt_user_ns(fp->filp);
5757         if (ksmbd_stream_fd(fp))
5758                 goto next;
5759
5760         parent = dget_parent(dentry);
5761         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5762         if (ret) {
5763                 dput(parent);
5764                 return ret;
5765         }
5766
5767         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5768         inode_unlock(d_inode(parent));
5769         dput(parent);
5770
5771         if (parent_fp) {
5772                 if (parent_fp->daccess & FILE_DELETE_LE) {
5773                         pr_err("parent dir is opened with delete access\n");
5774                         return -ESHARE;
5775                 }
5776         }
5777 next:
5778         return smb2_rename(work, fp, user_ns, rename_info,
5779                            work->sess->conn->local_nls);
5780 }
5781
5782 static int set_file_disposition_info(struct ksmbd_file *fp,
5783                                      struct smb2_file_disposition_info *file_info)
5784 {
5785         struct inode *inode;
5786
5787         if (!(fp->daccess & FILE_DELETE_LE)) {
5788                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5789                 return -EACCES;
5790         }
5791
5792         inode = file_inode(fp->filp);
5793         if (file_info->DeletePending) {
5794                 if (S_ISDIR(inode->i_mode) &&
5795                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5796                         return -EBUSY;
5797                 ksmbd_set_inode_pending_delete(fp);
5798         } else {
5799                 ksmbd_clear_inode_pending_delete(fp);
5800         }
5801         return 0;
5802 }
5803
5804 static int set_file_position_info(struct ksmbd_file *fp,
5805                                   struct smb2_file_pos_info *file_info)
5806 {
5807         loff_t current_byte_offset;
5808         unsigned long sector_size;
5809         struct inode *inode;
5810
5811         inode = file_inode(fp->filp);
5812         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5813         sector_size = inode->i_sb->s_blocksize;
5814
5815         if (current_byte_offset < 0 ||
5816             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5817              current_byte_offset & (sector_size - 1))) {
5818                 pr_err("CurrentByteOffset is not valid : %llu\n",
5819                        current_byte_offset);
5820                 return -EINVAL;
5821         }
5822
5823         fp->filp->f_pos = current_byte_offset;
5824         return 0;
5825 }
5826
5827 static int set_file_mode_info(struct ksmbd_file *fp,
5828                               struct smb2_file_mode_info *file_info)
5829 {
5830         __le32 mode;
5831
5832         mode = file_info->Mode;
5833
5834         if ((mode & ~FILE_MODE_INFO_MASK)) {
5835                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5836                 return -EINVAL;
5837         }
5838
5839         /*
5840          * TODO : need to implement consideration for
5841          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5842          */
5843         ksmbd_vfs_set_fadvise(fp->filp, mode);
5844         fp->coption = mode;
5845         return 0;
5846 }
5847
5848 /**
5849  * smb2_set_info_file() - handler for smb2 set info command
5850  * @work:       smb work containing set info command buffer
5851  * @fp:         ksmbd_file pointer
5852  * @req:        request buffer pointer
5853  * @share:      ksmbd_share_config pointer
5854  *
5855  * Return:      0 on success, otherwise error
5856  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5857  */
5858 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5859                               struct smb2_set_info_req *req,
5860                               struct ksmbd_share_config *share)
5861 {
5862         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5863
5864         switch (req->FileInfoClass) {
5865         case FILE_BASIC_INFORMATION:
5866         {
5867                 if (buf_len < sizeof(struct smb2_file_basic_info))
5868                         return -EINVAL;
5869
5870                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5871         }
5872         case FILE_ALLOCATION_INFORMATION:
5873         {
5874                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5875                         return -EINVAL;
5876
5877                 return set_file_allocation_info(work, fp,
5878                                                 (struct smb2_file_alloc_info *)req->Buffer);
5879         }
5880         case FILE_END_OF_FILE_INFORMATION:
5881         {
5882                 if (buf_len < sizeof(struct smb2_file_eof_info))
5883                         return -EINVAL;
5884
5885                 return set_end_of_file_info(work, fp,
5886                                             (struct smb2_file_eof_info *)req->Buffer);
5887         }
5888         case FILE_RENAME_INFORMATION:
5889         {
5890                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5891                         ksmbd_debug(SMB,
5892                                     "User does not have write permission\n");
5893                         return -EACCES;
5894                 }
5895
5896                 if (buf_len < sizeof(struct smb2_file_rename_info))
5897                         return -EINVAL;
5898
5899                 return set_rename_info(work, fp,
5900                                        (struct smb2_file_rename_info *)req->Buffer,
5901                                        buf_len);
5902         }
5903         case FILE_LINK_INFORMATION:
5904         {
5905                 if (buf_len < sizeof(struct smb2_file_link_info))
5906                         return -EINVAL;
5907
5908                 return smb2_create_link(work, work->tcon->share_conf,
5909                                         (struct smb2_file_link_info *)req->Buffer,
5910                                         buf_len, fp->filp,
5911                                         work->sess->conn->local_nls);
5912         }
5913         case FILE_DISPOSITION_INFORMATION:
5914         {
5915                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5916                         ksmbd_debug(SMB,
5917                                     "User does not have write permission\n");
5918                         return -EACCES;
5919                 }
5920
5921                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5922                         return -EINVAL;
5923
5924                 return set_file_disposition_info(fp,
5925                                                  (struct smb2_file_disposition_info *)req->Buffer);
5926         }
5927         case FILE_FULL_EA_INFORMATION:
5928         {
5929                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5930                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5931                                fp->daccess);
5932                         return -EACCES;
5933                 }
5934
5935                 if (buf_len < sizeof(struct smb2_ea_info))
5936                         return -EINVAL;
5937
5938                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5939                                    buf_len, &fp->filp->f_path);
5940         }
5941         case FILE_POSITION_INFORMATION:
5942         {
5943                 if (buf_len < sizeof(struct smb2_file_pos_info))
5944                         return -EINVAL;
5945
5946                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5947         }
5948         case FILE_MODE_INFORMATION:
5949         {
5950                 if (buf_len < sizeof(struct smb2_file_mode_info))
5951                         return -EINVAL;
5952
5953                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5954         }
5955         }
5956
5957         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5958         return -EOPNOTSUPP;
5959 }
5960
5961 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5962                              char *buffer, int buf_len)
5963 {
5964         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5965
5966         fp->saccess |= FILE_SHARE_DELETE_LE;
5967
5968         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5969                         buf_len, false);
5970 }
5971
5972 /**
5973  * smb2_set_info() - handler for smb2 set info command handler
5974  * @work:       smb work containing set info request buffer
5975  *
5976  * Return:      0 on success, otherwise error
5977  */
5978 int smb2_set_info(struct ksmbd_work *work)
5979 {
5980         struct smb2_set_info_req *req;
5981         struct smb2_set_info_rsp *rsp;
5982         struct ksmbd_file *fp;
5983         int rc = 0;
5984         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5985
5986         ksmbd_debug(SMB, "Received set info request\n");
5987
5988         if (work->next_smb2_rcv_hdr_off) {
5989                 req = ksmbd_req_buf_next(work);
5990                 rsp = ksmbd_resp_buf_next(work);
5991                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5992                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5993                                     work->compound_fid);
5994                         id = work->compound_fid;
5995                         pid = work->compound_pfid;
5996                 }
5997         } else {
5998                 req = smb2_get_msg(work->request_buf);
5999                 rsp = smb2_get_msg(work->response_buf);
6000         }
6001
6002         if (!has_file_id(id)) {
6003                 id = le64_to_cpu(req->VolatileFileId);
6004                 pid = le64_to_cpu(req->PersistentFileId);
6005         }
6006
6007         fp = ksmbd_lookup_fd_slow(work, id, pid);
6008         if (!fp) {
6009                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6010                 rc = -ENOENT;
6011                 goto err_out;
6012         }
6013
6014         switch (req->InfoType) {
6015         case SMB2_O_INFO_FILE:
6016                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6017                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6018                 break;
6019         case SMB2_O_INFO_SECURITY:
6020                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6021                 if (ksmbd_override_fsids(work)) {
6022                         rc = -ENOMEM;
6023                         goto err_out;
6024                 }
6025                 rc = smb2_set_info_sec(fp,
6026                                        le32_to_cpu(req->AdditionalInformation),
6027                                        req->Buffer,
6028                                        le32_to_cpu(req->BufferLength));
6029                 ksmbd_revert_fsids(work);
6030                 break;
6031         default:
6032                 rc = -EOPNOTSUPP;
6033         }
6034
6035         if (rc < 0)
6036                 goto err_out;
6037
6038         rsp->StructureSize = cpu_to_le16(2);
6039         inc_rfc1001_len(work->response_buf, 2);
6040         ksmbd_fd_put(work, fp);
6041         return 0;
6042
6043 err_out:
6044         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6045                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6046         else if (rc == -EINVAL)
6047                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6048         else if (rc == -ESHARE)
6049                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6050         else if (rc == -ENOENT)
6051                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6052         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6053                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6054         else if (rc == -EAGAIN)
6055                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6056         else if (rc == -EBADF || rc == -ESTALE)
6057                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6058         else if (rc == -EEXIST)
6059                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6060         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6061                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6062         smb2_set_err_rsp(work);
6063         ksmbd_fd_put(work, fp);
6064         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6065         return rc;
6066 }
6067
6068 /**
6069  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6070  * @work:       smb work containing read IPC pipe command buffer
6071  *
6072  * Return:      0 on success, otherwise error
6073  */
6074 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6075 {
6076         int nbytes = 0, err;
6077         u64 id;
6078         struct ksmbd_rpc_command *rpc_resp;
6079         struct smb2_read_req *req = smb2_get_msg(work->request_buf);
6080         struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
6081
6082         id = le64_to_cpu(req->VolatileFileId);
6083
6084         inc_rfc1001_len(work->response_buf, 16);
6085         rpc_resp = ksmbd_rpc_read(work->sess, id);
6086         if (rpc_resp) {
6087                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6088                         err = -EINVAL;
6089                         goto out;
6090                 }
6091
6092                 work->aux_payload_buf =
6093                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6094                 if (!work->aux_payload_buf) {
6095                         err = -ENOMEM;
6096                         goto out;
6097                 }
6098
6099                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6100                        rpc_resp->payload_sz);
6101
6102                 nbytes = rpc_resp->payload_sz;
6103                 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6104                 work->aux_payload_sz = nbytes;
6105                 kvfree(rpc_resp);
6106         }
6107
6108         rsp->StructureSize = cpu_to_le16(17);
6109         rsp->DataOffset = 80;
6110         rsp->Reserved = 0;
6111         rsp->DataLength = cpu_to_le32(nbytes);
6112         rsp->DataRemaining = 0;
6113         rsp->Flags = 0;
6114         inc_rfc1001_len(work->response_buf, nbytes);
6115         return 0;
6116
6117 out:
6118         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6119         smb2_set_err_rsp(work);
6120         kvfree(rpc_resp);
6121         return err;
6122 }
6123
6124 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6125                                         struct smb2_buffer_desc_v1 *desc,
6126                                         __le32 Channel,
6127                                         __le16 ChannelInfoOffset,
6128                                         __le16 ChannelInfoLength)
6129 {
6130         unsigned int i, ch_count;
6131
6132         if (work->conn->dialect == SMB30_PROT_ID &&
6133             Channel != SMB2_CHANNEL_RDMA_V1)
6134                 return -EINVAL;
6135
6136         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6137         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6138                 for (i = 0; i < ch_count; i++) {
6139                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6140                                 i,
6141                                 le32_to_cpu(desc[i].token),
6142                                 le32_to_cpu(desc[i].length));
6143                 }
6144         }
6145         if (ch_count != 1) {
6146                 ksmbd_debug(RDMA, "RDMA multiple buffer descriptors %d are not supported yet\n",
6147                             ch_count);
6148                 return -EINVAL;
6149         }
6150
6151         work->need_invalidate_rkey =
6152                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6153         work->remote_key = le32_to_cpu(desc->token);
6154         return 0;
6155 }
6156
6157 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6158                                       struct smb2_read_req *req, void *data_buf,
6159                                       size_t length)
6160 {
6161         struct smb2_buffer_desc_v1 *desc =
6162                 (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6163         int err;
6164
6165         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6166                                     le32_to_cpu(desc->token),
6167                                     le64_to_cpu(desc->offset),
6168                                     le32_to_cpu(desc->length));
6169         if (err)
6170                 return err;
6171
6172         return length;
6173 }
6174
6175 /**
6176  * smb2_read() - handler for smb2 read from file
6177  * @work:       smb work containing read command buffer
6178  *
6179  * Return:      0 on success, otherwise error
6180  */
6181 int smb2_read(struct ksmbd_work *work)
6182 {
6183         struct ksmbd_conn *conn = work->conn;
6184         struct smb2_read_req *req;
6185         struct smb2_read_rsp *rsp;
6186         struct ksmbd_file *fp = NULL;
6187         loff_t offset;
6188         size_t length, mincount;
6189         ssize_t nbytes = 0, remain_bytes = 0;
6190         int err = 0;
6191
6192         WORK_BUFFERS(work, req, rsp);
6193
6194         if (test_share_config_flag(work->tcon->share_conf,
6195                                    KSMBD_SHARE_FLAG_PIPE)) {
6196                 ksmbd_debug(SMB, "IPC pipe read request\n");
6197                 return smb2_read_pipe(work);
6198         }
6199
6200         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6201             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6202                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6203
6204                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6205                         err = -EINVAL;
6206                         goto out;
6207                 }
6208                 err = smb2_set_remote_key_for_rdma(work,
6209                                                    (struct smb2_buffer_desc_v1 *)
6210                                                    ((char *)req + ch_offset),
6211                                                    req->Channel,
6212                                                    req->ReadChannelInfoOffset,
6213                                                    req->ReadChannelInfoLength);
6214                 if (err)
6215                         goto out;
6216         }
6217
6218         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6219                                   le64_to_cpu(req->PersistentFileId));
6220         if (!fp) {
6221                 err = -ENOENT;
6222                 goto out;
6223         }
6224
6225         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6226                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6227                 err = -EACCES;
6228                 goto out;
6229         }
6230
6231         offset = le64_to_cpu(req->Offset);
6232         length = le32_to_cpu(req->Length);
6233         mincount = le32_to_cpu(req->MinimumCount);
6234
6235         if (length > conn->vals->max_read_size) {
6236                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6237                             conn->vals->max_read_size);
6238                 err = -EINVAL;
6239                 goto out;
6240         }
6241
6242         ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6243                     fp->filp->f_path.dentry, offset, length);
6244
6245         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6246         if (!work->aux_payload_buf) {
6247                 err = -ENOMEM;
6248                 goto out;
6249         }
6250
6251         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6252         if (nbytes < 0) {
6253                 err = nbytes;
6254                 goto out;
6255         }
6256
6257         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6258                 kvfree(work->aux_payload_buf);
6259                 work->aux_payload_buf = NULL;
6260                 rsp->hdr.Status = STATUS_END_OF_FILE;
6261                 smb2_set_err_rsp(work);
6262                 ksmbd_fd_put(work, fp);
6263                 return 0;
6264         }
6265
6266         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6267                     nbytes, offset, mincount);
6268
6269         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6270             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6271                 /* write data to the client using rdma channel */
6272                 remain_bytes = smb2_read_rdma_channel(work, req,
6273                                                       work->aux_payload_buf,
6274                                                       nbytes);
6275                 kvfree(work->aux_payload_buf);
6276                 work->aux_payload_buf = NULL;
6277
6278                 nbytes = 0;
6279                 if (remain_bytes < 0) {
6280                         err = (int)remain_bytes;
6281                         goto out;
6282                 }
6283         }
6284
6285         rsp->StructureSize = cpu_to_le16(17);
6286         rsp->DataOffset = 80;
6287         rsp->Reserved = 0;
6288         rsp->DataLength = cpu_to_le32(nbytes);
6289         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6290         rsp->Flags = 0;
6291         inc_rfc1001_len(work->response_buf, 16);
6292         work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6293         work->aux_payload_sz = nbytes;
6294         inc_rfc1001_len(work->response_buf, nbytes);
6295         ksmbd_fd_put(work, fp);
6296         return 0;
6297
6298 out:
6299         if (err) {
6300                 if (err == -EISDIR)
6301                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6302                 else if (err == -EAGAIN)
6303                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6304                 else if (err == -ENOENT)
6305                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6306                 else if (err == -EACCES)
6307                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6308                 else if (err == -ESHARE)
6309                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6310                 else if (err == -EINVAL)
6311                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6312                 else
6313                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6314
6315                 smb2_set_err_rsp(work);
6316         }
6317         ksmbd_fd_put(work, fp);
6318         return err;
6319 }
6320
6321 /**
6322  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6323  * @work:       smb work containing write IPC pipe command buffer
6324  *
6325  * Return:      0 on success, otherwise error
6326  */
6327 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6328 {
6329         struct smb2_write_req *req = smb2_get_msg(work->request_buf);
6330         struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
6331         struct ksmbd_rpc_command *rpc_resp;
6332         u64 id = 0;
6333         int err = 0, ret = 0;
6334         char *data_buf;
6335         size_t length;
6336
6337         length = le32_to_cpu(req->Length);
6338         id = le64_to_cpu(req->VolatileFileId);
6339
6340         if (le16_to_cpu(req->DataOffset) ==
6341             offsetof(struct smb2_write_req, Buffer)) {
6342                 data_buf = (char *)&req->Buffer[0];
6343         } else {
6344                 if ((u64)le16_to_cpu(req->DataOffset) + length >
6345                     get_rfc1002_len(work->request_buf)) {
6346                         pr_err("invalid write data offset %u, smb_len %u\n",
6347                                le16_to_cpu(req->DataOffset),
6348                                get_rfc1002_len(work->request_buf));
6349                         err = -EINVAL;
6350                         goto out;
6351                 }
6352
6353                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6354                                 le16_to_cpu(req->DataOffset));
6355         }
6356
6357         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6358         if (rpc_resp) {
6359                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6360                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6361                         kvfree(rpc_resp);
6362                         smb2_set_err_rsp(work);
6363                         return -EOPNOTSUPP;
6364                 }
6365                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6366                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6367                         smb2_set_err_rsp(work);
6368                         kvfree(rpc_resp);
6369                         return ret;
6370                 }
6371                 kvfree(rpc_resp);
6372         }
6373
6374         rsp->StructureSize = cpu_to_le16(17);
6375         rsp->DataOffset = 0;
6376         rsp->Reserved = 0;
6377         rsp->DataLength = cpu_to_le32(length);
6378         rsp->DataRemaining = 0;
6379         rsp->Reserved2 = 0;
6380         inc_rfc1001_len(work->response_buf, 16);
6381         return 0;
6382 out:
6383         if (err) {
6384                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6385                 smb2_set_err_rsp(work);
6386         }
6387
6388         return err;
6389 }
6390
6391 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6392                                        struct smb2_write_req *req,
6393                                        struct ksmbd_file *fp,
6394                                        loff_t offset, size_t length, bool sync)
6395 {
6396         struct smb2_buffer_desc_v1 *desc;
6397         char *data_buf;
6398         int ret;
6399         ssize_t nbytes;
6400
6401         desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6402
6403         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6404         if (!data_buf)
6405                 return -ENOMEM;
6406
6407         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6408                                    le32_to_cpu(desc->token),
6409                                    le64_to_cpu(desc->offset),
6410                                    le32_to_cpu(desc->length));
6411         if (ret < 0) {
6412                 kvfree(data_buf);
6413                 return ret;
6414         }
6415
6416         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6417         kvfree(data_buf);
6418         if (ret < 0)
6419                 return ret;
6420
6421         return nbytes;
6422 }
6423
6424 /**
6425  * smb2_write() - handler for smb2 write from file
6426  * @work:       smb work containing write command buffer
6427  *
6428  * Return:      0 on success, otherwise error
6429  */
6430 int smb2_write(struct ksmbd_work *work)
6431 {
6432         struct smb2_write_req *req;
6433         struct smb2_write_rsp *rsp;
6434         struct ksmbd_file *fp = NULL;
6435         loff_t offset;
6436         size_t length;
6437         ssize_t nbytes;
6438         char *data_buf;
6439         bool writethrough = false;
6440         int err = 0;
6441
6442         WORK_BUFFERS(work, req, rsp);
6443
6444         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6445                 ksmbd_debug(SMB, "IPC pipe write request\n");
6446                 return smb2_write_pipe(work);
6447         }
6448
6449         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6450             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6451                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6452
6453                 if (req->Length != 0 || req->DataOffset != 0 ||
6454                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6455                         err = -EINVAL;
6456                         goto out;
6457                 }
6458                 err = smb2_set_remote_key_for_rdma(work,
6459                                                    (struct smb2_buffer_desc_v1 *)
6460                                                    ((char *)req + ch_offset),
6461                                                    req->Channel,
6462                                                    req->WriteChannelInfoOffset,
6463                                                    req->WriteChannelInfoLength);
6464                 if (err)
6465                         goto out;
6466         }
6467
6468         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6469                 ksmbd_debug(SMB, "User does not have write permission\n");
6470                 err = -EACCES;
6471                 goto out;
6472         }
6473
6474         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6475                                   le64_to_cpu(req->PersistentFileId));
6476         if (!fp) {
6477                 err = -ENOENT;
6478                 goto out;
6479         }
6480
6481         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6482                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6483                 err = -EACCES;
6484                 goto out;
6485         }
6486
6487         offset = le64_to_cpu(req->Offset);
6488         length = le32_to_cpu(req->Length);
6489
6490         if (length > work->conn->vals->max_write_size) {
6491                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6492                             work->conn->vals->max_write_size);
6493                 err = -EINVAL;
6494                 goto out;
6495         }
6496
6497         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6498                 writethrough = true;
6499
6500         if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
6501             req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6502                 if (le16_to_cpu(req->DataOffset) ==
6503                     offsetof(struct smb2_write_req, Buffer)) {
6504                         data_buf = (char *)&req->Buffer[0];
6505                 } else {
6506                         if ((u64)le16_to_cpu(req->DataOffset) + length >
6507                             get_rfc1002_len(work->request_buf)) {
6508                                 pr_err("invalid write data offset %u, smb_len %u\n",
6509                                        le16_to_cpu(req->DataOffset),
6510                                        get_rfc1002_len(work->request_buf));
6511                                 err = -EINVAL;
6512                                 goto out;
6513                         }
6514
6515                         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6516                                         le16_to_cpu(req->DataOffset));
6517                 }
6518
6519                 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6520                 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6521                         writethrough = true;
6522
6523                 ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6524                             fp->filp->f_path.dentry, offset, length);
6525                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6526                                       writethrough, &nbytes);
6527                 if (err < 0)
6528                         goto out;
6529         } else {
6530                 /* read data from the client using rdma channel, and
6531                  * write the data.
6532                  */
6533                 nbytes = smb2_write_rdma_channel(work, req, fp, offset,
6534                                                  le32_to_cpu(req->RemainingBytes),
6535                                                  writethrough);
6536                 if (nbytes < 0) {
6537                         err = (int)nbytes;
6538                         goto out;
6539                 }
6540         }
6541
6542         rsp->StructureSize = cpu_to_le16(17);
6543         rsp->DataOffset = 0;
6544         rsp->Reserved = 0;
6545         rsp->DataLength = cpu_to_le32(nbytes);
6546         rsp->DataRemaining = 0;
6547         rsp->Reserved2 = 0;
6548         inc_rfc1001_len(work->response_buf, 16);
6549         ksmbd_fd_put(work, fp);
6550         return 0;
6551
6552 out:
6553         if (err == -EAGAIN)
6554                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6555         else if (err == -ENOSPC || err == -EFBIG)
6556                 rsp->hdr.Status = STATUS_DISK_FULL;
6557         else if (err == -ENOENT)
6558                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6559         else if (err == -EACCES)
6560                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6561         else if (err == -ESHARE)
6562                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6563         else if (err == -EINVAL)
6564                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6565         else
6566                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6567
6568         smb2_set_err_rsp(work);
6569         ksmbd_fd_put(work, fp);
6570         return err;
6571 }
6572
6573 /**
6574  * smb2_flush() - handler for smb2 flush file - fsync
6575  * @work:       smb work containing flush command buffer
6576  *
6577  * Return:      0 on success, otherwise error
6578  */
6579 int smb2_flush(struct ksmbd_work *work)
6580 {
6581         struct smb2_flush_req *req;
6582         struct smb2_flush_rsp *rsp;
6583         int err;
6584
6585         WORK_BUFFERS(work, req, rsp);
6586
6587         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n",
6588                     le64_to_cpu(req->VolatileFileId));
6589
6590         err = ksmbd_vfs_fsync(work,
6591                               le64_to_cpu(req->VolatileFileId),
6592                               le64_to_cpu(req->PersistentFileId));
6593         if (err)
6594                 goto out;
6595
6596         rsp->StructureSize = cpu_to_le16(4);
6597         rsp->Reserved = 0;
6598         inc_rfc1001_len(work->response_buf, 4);
6599         return 0;
6600
6601 out:
6602         if (err) {
6603                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6604                 smb2_set_err_rsp(work);
6605         }
6606
6607         return err;
6608 }
6609
6610 /**
6611  * smb2_cancel() - handler for smb2 cancel command
6612  * @work:       smb work containing cancel command buffer
6613  *
6614  * Return:      0 on success, otherwise error
6615  */
6616 int smb2_cancel(struct ksmbd_work *work)
6617 {
6618         struct ksmbd_conn *conn = work->conn;
6619         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6620         struct smb2_hdr *chdr;
6621         struct ksmbd_work *cancel_work = NULL;
6622         int canceled = 0;
6623         struct list_head *command_list;
6624
6625         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6626                     hdr->MessageId, hdr->Flags);
6627
6628         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6629                 command_list = &conn->async_requests;
6630
6631                 spin_lock(&conn->request_lock);
6632                 list_for_each_entry(cancel_work, command_list,
6633                                     async_request_entry) {
6634                         chdr = smb2_get_msg(cancel_work->request_buf);
6635
6636                         if (cancel_work->async_id !=
6637                             le64_to_cpu(hdr->Id.AsyncId))
6638                                 continue;
6639
6640                         ksmbd_debug(SMB,
6641                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6642                                     le64_to_cpu(hdr->Id.AsyncId),
6643                                     le16_to_cpu(chdr->Command));
6644                         canceled = 1;
6645                         break;
6646                 }
6647                 spin_unlock(&conn->request_lock);
6648         } else {
6649                 command_list = &conn->requests;
6650
6651                 spin_lock(&conn->request_lock);
6652                 list_for_each_entry(cancel_work, command_list, request_entry) {
6653                         chdr = smb2_get_msg(cancel_work->request_buf);
6654
6655                         if (chdr->MessageId != hdr->MessageId ||
6656                             cancel_work == work)
6657                                 continue;
6658
6659                         ksmbd_debug(SMB,
6660                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6661                                     le64_to_cpu(hdr->MessageId),
6662                                     le16_to_cpu(chdr->Command));
6663                         canceled = 1;
6664                         break;
6665                 }
6666                 spin_unlock(&conn->request_lock);
6667         }
6668
6669         if (canceled) {
6670                 cancel_work->state = KSMBD_WORK_CANCELLED;
6671                 if (cancel_work->cancel_fn)
6672                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6673         }
6674
6675         /* For SMB2_CANCEL command itself send no response*/
6676         work->send_no_response = 1;
6677         return 0;
6678 }
6679
6680 struct file_lock *smb_flock_init(struct file *f)
6681 {
6682         struct file_lock *fl;
6683
6684         fl = locks_alloc_lock();
6685         if (!fl)
6686                 goto out;
6687
6688         locks_init_lock(fl);
6689
6690         fl->fl_owner = f;
6691         fl->fl_pid = current->tgid;
6692         fl->fl_file = f;
6693         fl->fl_flags = FL_POSIX;
6694         fl->fl_ops = NULL;
6695         fl->fl_lmops = NULL;
6696
6697 out:
6698         return fl;
6699 }
6700
6701 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6702 {
6703         int cmd = -EINVAL;
6704
6705         /* Checking for wrong flag combination during lock request*/
6706         switch (flags) {
6707         case SMB2_LOCKFLAG_SHARED:
6708                 ksmbd_debug(SMB, "received shared request\n");
6709                 cmd = F_SETLKW;
6710                 flock->fl_type = F_RDLCK;
6711                 flock->fl_flags |= FL_SLEEP;
6712                 break;
6713         case SMB2_LOCKFLAG_EXCLUSIVE:
6714                 ksmbd_debug(SMB, "received exclusive request\n");
6715                 cmd = F_SETLKW;
6716                 flock->fl_type = F_WRLCK;
6717                 flock->fl_flags |= FL_SLEEP;
6718                 break;
6719         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6720                 ksmbd_debug(SMB,
6721                             "received shared & fail immediately request\n");
6722                 cmd = F_SETLK;
6723                 flock->fl_type = F_RDLCK;
6724                 break;
6725         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6726                 ksmbd_debug(SMB,
6727                             "received exclusive & fail immediately request\n");
6728                 cmd = F_SETLK;
6729                 flock->fl_type = F_WRLCK;
6730                 break;
6731         case SMB2_LOCKFLAG_UNLOCK:
6732                 ksmbd_debug(SMB, "received unlock request\n");
6733                 flock->fl_type = F_UNLCK;
6734                 cmd = 0;
6735                 break;
6736         }
6737
6738         return cmd;
6739 }
6740
6741 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6742                                          unsigned int cmd, int flags,
6743                                          struct list_head *lock_list)
6744 {
6745         struct ksmbd_lock *lock;
6746
6747         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6748         if (!lock)
6749                 return NULL;
6750
6751         lock->cmd = cmd;
6752         lock->fl = flock;
6753         lock->start = flock->fl_start;
6754         lock->end = flock->fl_end;
6755         lock->flags = flags;
6756         if (lock->start == lock->end)
6757                 lock->zero_len = 1;
6758         INIT_LIST_HEAD(&lock->clist);
6759         INIT_LIST_HEAD(&lock->flist);
6760         INIT_LIST_HEAD(&lock->llist);
6761         list_add_tail(&lock->llist, lock_list);
6762
6763         return lock;
6764 }
6765
6766 static void smb2_remove_blocked_lock(void **argv)
6767 {
6768         struct file_lock *flock = (struct file_lock *)argv[0];
6769
6770         ksmbd_vfs_posix_lock_unblock(flock);
6771         wake_up(&flock->fl_wait);
6772 }
6773
6774 static inline bool lock_defer_pending(struct file_lock *fl)
6775 {
6776         /* check pending lock waiters */
6777         return waitqueue_active(&fl->fl_wait);
6778 }
6779
6780 /**
6781  * smb2_lock() - handler for smb2 file lock command
6782  * @work:       smb work containing lock command buffer
6783  *
6784  * Return:      0 on success, otherwise error
6785  */
6786 int smb2_lock(struct ksmbd_work *work)
6787 {
6788         struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
6789         struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
6790         struct smb2_lock_element *lock_ele;
6791         struct ksmbd_file *fp = NULL;
6792         struct file_lock *flock = NULL;
6793         struct file *filp = NULL;
6794         int lock_count;
6795         int flags = 0;
6796         int cmd = 0;
6797         int err = -EIO, i, rc = 0;
6798         u64 lock_start, lock_length;
6799         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6800         struct ksmbd_conn *conn;
6801         int nolock = 0;
6802         LIST_HEAD(lock_list);
6803         LIST_HEAD(rollback_list);
6804         int prior_lock = 0;
6805
6806         ksmbd_debug(SMB, "Received lock request\n");
6807         fp = ksmbd_lookup_fd_slow(work,
6808                                   le64_to_cpu(req->VolatileFileId),
6809                                   le64_to_cpu(req->PersistentFileId));
6810         if (!fp) {
6811                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n",
6812                             le64_to_cpu(req->VolatileFileId));
6813                 err = -ENOENT;
6814                 goto out2;
6815         }
6816
6817         filp = fp->filp;
6818         lock_count = le16_to_cpu(req->LockCount);
6819         lock_ele = req->locks;
6820
6821         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6822         if (!lock_count) {
6823                 err = -EINVAL;
6824                 goto out2;
6825         }
6826
6827         for (i = 0; i < lock_count; i++) {
6828                 flags = le32_to_cpu(lock_ele[i].Flags);
6829
6830                 flock = smb_flock_init(filp);
6831                 if (!flock)
6832                         goto out;
6833
6834                 cmd = smb2_set_flock_flags(flock, flags);
6835
6836                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6837                 lock_length = le64_to_cpu(lock_ele[i].Length);
6838                 if (lock_start > U64_MAX - lock_length) {
6839                         pr_err("Invalid lock range requested\n");
6840                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6841                         goto out;
6842                 }
6843
6844                 if (lock_start > OFFSET_MAX)
6845                         flock->fl_start = OFFSET_MAX;
6846                 else
6847                         flock->fl_start = lock_start;
6848
6849                 lock_length = le64_to_cpu(lock_ele[i].Length);
6850                 if (lock_length > OFFSET_MAX - flock->fl_start)
6851                         lock_length = OFFSET_MAX - flock->fl_start;
6852
6853                 flock->fl_end = flock->fl_start + lock_length;
6854
6855                 if (flock->fl_end < flock->fl_start) {
6856                         ksmbd_debug(SMB,
6857                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6858                                     flock->fl_end, flock->fl_start);
6859                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6860                         goto out;
6861                 }
6862
6863                 /* Check conflict locks in one request */
6864                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6865                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6866                             cmp_lock->fl->fl_end >= flock->fl_end) {
6867                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6868                                     flock->fl_type != F_UNLCK) {
6869                                         pr_err("conflict two locks in one request\n");
6870                                         err = -EINVAL;
6871                                         goto out;
6872                                 }
6873                         }
6874                 }
6875
6876                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6877                 if (!smb_lock) {
6878                         err = -EINVAL;
6879                         goto out;
6880                 }
6881         }
6882
6883         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6884                 if (smb_lock->cmd < 0) {
6885                         err = -EINVAL;
6886                         goto out;
6887                 }
6888
6889                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6890                         err = -EINVAL;
6891                         goto out;
6892                 }
6893
6894                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6895                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6896                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6897                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6898                         err = -EINVAL;
6899                         goto out;
6900                 }
6901
6902                 prior_lock = smb_lock->flags;
6903
6904                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6905                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6906                         goto no_check_cl;
6907
6908                 nolock = 1;
6909                 /* check locks in connection list */
6910                 read_lock(&conn_list_lock);
6911                 list_for_each_entry(conn, &conn_list, conns_list) {
6912                         spin_lock(&conn->llist_lock);
6913                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6914                                 if (file_inode(cmp_lock->fl->fl_file) !=
6915                                     file_inode(smb_lock->fl->fl_file))
6916                                         continue;
6917
6918                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6919                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6920                                             cmp_lock->start == smb_lock->start &&
6921                                             cmp_lock->end == smb_lock->end &&
6922                                             !lock_defer_pending(cmp_lock->fl)) {
6923                                                 nolock = 0;
6924                                                 list_del(&cmp_lock->flist);
6925                                                 list_del(&cmp_lock->clist);
6926                                                 spin_unlock(&conn->llist_lock);
6927                                                 read_unlock(&conn_list_lock);
6928
6929                                                 locks_free_lock(cmp_lock->fl);
6930                                                 kfree(cmp_lock);
6931                                                 goto out_check_cl;
6932                                         }
6933                                         continue;
6934                                 }
6935
6936                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6937                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6938                                                 continue;
6939                                 } else {
6940                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6941                                                 continue;
6942                                 }
6943
6944                                 /* check zero byte lock range */
6945                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6946                                     cmp_lock->start > smb_lock->start &&
6947                                     cmp_lock->start < smb_lock->end) {
6948                                         spin_unlock(&conn->llist_lock);
6949                                         read_unlock(&conn_list_lock);
6950                                         pr_err("previous lock conflict with zero byte lock range\n");
6951                                         goto out;
6952                                 }
6953
6954                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6955                                     smb_lock->start > cmp_lock->start &&
6956                                     smb_lock->start < cmp_lock->end) {
6957                                         spin_unlock(&conn->llist_lock);
6958                                         read_unlock(&conn_list_lock);
6959                                         pr_err("current lock conflict with zero byte lock range\n");
6960                                         goto out;
6961                                 }
6962
6963                                 if (((cmp_lock->start <= smb_lock->start &&
6964                                       cmp_lock->end > smb_lock->start) ||
6965                                      (cmp_lock->start < smb_lock->end &&
6966                                       cmp_lock->end >= smb_lock->end)) &&
6967                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6968                                         spin_unlock(&conn->llist_lock);
6969                                         read_unlock(&conn_list_lock);
6970                                         pr_err("Not allow lock operation on exclusive lock range\n");
6971                                         goto out;
6972                                 }
6973                         }
6974                         spin_unlock(&conn->llist_lock);
6975                 }
6976                 read_unlock(&conn_list_lock);
6977 out_check_cl:
6978                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6979                         pr_err("Try to unlock nolocked range\n");
6980                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
6981                         goto out;
6982                 }
6983
6984 no_check_cl:
6985                 if (smb_lock->zero_len) {
6986                         err = 0;
6987                         goto skip;
6988                 }
6989
6990                 flock = smb_lock->fl;
6991                 list_del(&smb_lock->llist);
6992 retry:
6993                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
6994 skip:
6995                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
6996                         if (!rc) {
6997                                 ksmbd_debug(SMB, "File unlocked\n");
6998                         } else if (rc == -ENOENT) {
6999                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7000                                 goto out;
7001                         }
7002                         locks_free_lock(flock);
7003                         kfree(smb_lock);
7004                 } else {
7005                         if (rc == FILE_LOCK_DEFERRED) {
7006                                 void **argv;
7007
7008                                 ksmbd_debug(SMB,
7009                                             "would have to wait for getting lock\n");
7010                                 spin_lock(&work->conn->llist_lock);
7011                                 list_add_tail(&smb_lock->clist,
7012                                               &work->conn->lock_list);
7013                                 spin_unlock(&work->conn->llist_lock);
7014                                 list_add(&smb_lock->llist, &rollback_list);
7015
7016                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7017                                 if (!argv) {
7018                                         err = -ENOMEM;
7019                                         goto out;
7020                                 }
7021                                 argv[0] = flock;
7022
7023                                 rc = setup_async_work(work,
7024                                                       smb2_remove_blocked_lock,
7025                                                       argv);
7026                                 if (rc) {
7027                                         err = -ENOMEM;
7028                                         goto out;
7029                                 }
7030                                 spin_lock(&fp->f_lock);
7031                                 list_add(&work->fp_entry, &fp->blocked_works);
7032                                 spin_unlock(&fp->f_lock);
7033
7034                                 smb2_send_interim_resp(work, STATUS_PENDING);
7035
7036                                 ksmbd_vfs_posix_lock_wait(flock);
7037
7038                                 if (work->state != KSMBD_WORK_ACTIVE) {
7039                                         list_del(&smb_lock->llist);
7040                                         spin_lock(&work->conn->llist_lock);
7041                                         list_del(&smb_lock->clist);
7042                                         spin_unlock(&work->conn->llist_lock);
7043                                         locks_free_lock(flock);
7044
7045                                         if (work->state == KSMBD_WORK_CANCELLED) {
7046                                                 spin_lock(&fp->f_lock);
7047                                                 list_del(&work->fp_entry);
7048                                                 spin_unlock(&fp->f_lock);
7049                                                 rsp->hdr.Status =
7050                                                         STATUS_CANCELLED;
7051                                                 kfree(smb_lock);
7052                                                 smb2_send_interim_resp(work,
7053                                                                        STATUS_CANCELLED);
7054                                                 work->send_no_response = 1;
7055                                                 goto out;
7056                                         }
7057                                         init_smb2_rsp_hdr(work);
7058                                         smb2_set_err_rsp(work);
7059                                         rsp->hdr.Status =
7060                                                 STATUS_RANGE_NOT_LOCKED;
7061                                         kfree(smb_lock);
7062                                         goto out2;
7063                                 }
7064
7065                                 list_del(&smb_lock->llist);
7066                                 spin_lock(&work->conn->llist_lock);
7067                                 list_del(&smb_lock->clist);
7068                                 spin_unlock(&work->conn->llist_lock);
7069
7070                                 spin_lock(&fp->f_lock);
7071                                 list_del(&work->fp_entry);
7072                                 spin_unlock(&fp->f_lock);
7073                                 goto retry;
7074                         } else if (!rc) {
7075                                 spin_lock(&work->conn->llist_lock);
7076                                 list_add_tail(&smb_lock->clist,
7077                                               &work->conn->lock_list);
7078                                 list_add_tail(&smb_lock->flist,
7079                                               &fp->lock_list);
7080                                 spin_unlock(&work->conn->llist_lock);
7081                                 list_add(&smb_lock->llist, &rollback_list);
7082                                 ksmbd_debug(SMB, "successful in taking lock\n");
7083                         } else {
7084                                 goto out;
7085                         }
7086                 }
7087         }
7088
7089         if (atomic_read(&fp->f_ci->op_count) > 1)
7090                 smb_break_all_oplock(work, fp);
7091
7092         rsp->StructureSize = cpu_to_le16(4);
7093         ksmbd_debug(SMB, "successful in taking lock\n");
7094         rsp->hdr.Status = STATUS_SUCCESS;
7095         rsp->Reserved = 0;
7096         inc_rfc1001_len(work->response_buf, 4);
7097         ksmbd_fd_put(work, fp);
7098         return 0;
7099
7100 out:
7101         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7102                 locks_free_lock(smb_lock->fl);
7103                 list_del(&smb_lock->llist);
7104                 kfree(smb_lock);
7105         }
7106
7107         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7108                 struct file_lock *rlock = NULL;
7109
7110                 rlock = smb_flock_init(filp);
7111                 rlock->fl_type = F_UNLCK;
7112                 rlock->fl_start = smb_lock->start;
7113                 rlock->fl_end = smb_lock->end;
7114
7115                 rc = vfs_lock_file(filp, 0, rlock, NULL);
7116                 if (rc)
7117                         pr_err("rollback unlock fail : %d\n", rc);
7118
7119                 list_del(&smb_lock->llist);
7120                 spin_lock(&work->conn->llist_lock);
7121                 if (!list_empty(&smb_lock->flist))
7122                         list_del(&smb_lock->flist);
7123                 list_del(&smb_lock->clist);
7124                 spin_unlock(&work->conn->llist_lock);
7125
7126                 locks_free_lock(smb_lock->fl);
7127                 locks_free_lock(rlock);
7128                 kfree(smb_lock);
7129         }
7130 out2:
7131         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7132
7133         if (!rsp->hdr.Status) {
7134                 if (err == -EINVAL)
7135                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7136                 else if (err == -ENOMEM)
7137                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7138                 else if (err == -ENOENT)
7139                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7140                 else
7141                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7142         }
7143
7144         smb2_set_err_rsp(work);
7145         ksmbd_fd_put(work, fp);
7146         return err;
7147 }
7148
7149 static int fsctl_copychunk(struct ksmbd_work *work,
7150                            struct copychunk_ioctl_req *ci_req,
7151                            unsigned int cnt_code,
7152                            unsigned int input_count,
7153                            unsigned long long volatile_id,
7154                            unsigned long long persistent_id,
7155                            struct smb2_ioctl_rsp *rsp)
7156 {
7157         struct copychunk_ioctl_rsp *ci_rsp;
7158         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7159         struct srv_copychunk *chunks;
7160         unsigned int i, chunk_count, chunk_count_written = 0;
7161         unsigned int chunk_size_written = 0;
7162         loff_t total_size_written = 0;
7163         int ret = 0;
7164
7165         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7166
7167         rsp->VolatileFileId = cpu_to_le64(volatile_id);
7168         rsp->PersistentFileId = cpu_to_le64(persistent_id);
7169         ci_rsp->ChunksWritten =
7170                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7171         ci_rsp->ChunkBytesWritten =
7172                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7173         ci_rsp->TotalBytesWritten =
7174                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7175
7176         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7177         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7178         if (chunk_count == 0)
7179                 goto out;
7180         total_size_written = 0;
7181
7182         /* verify the SRV_COPYCHUNK_COPY packet */
7183         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7184             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7185              chunk_count * sizeof(struct srv_copychunk)) {
7186                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7187                 return -EINVAL;
7188         }
7189
7190         for (i = 0; i < chunk_count; i++) {
7191                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7192                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7193                         break;
7194                 total_size_written += le32_to_cpu(chunks[i].Length);
7195         }
7196
7197         if (i < chunk_count ||
7198             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7199                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7200                 return -EINVAL;
7201         }
7202
7203         src_fp = ksmbd_lookup_foreign_fd(work,
7204                                          le64_to_cpu(ci_req->ResumeKey[0]));
7205         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7206         ret = -EINVAL;
7207         if (!src_fp ||
7208             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7209                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7210                 goto out;
7211         }
7212
7213         if (!dst_fp) {
7214                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7215                 goto out;
7216         }
7217
7218         /*
7219          * FILE_READ_DATA should only be included in
7220          * the FSCTL_COPYCHUNK case
7221          */
7222         if (cnt_code == FSCTL_COPYCHUNK &&
7223             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7224                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7225                 goto out;
7226         }
7227
7228         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7229                                          chunks, chunk_count,
7230                                          &chunk_count_written,
7231                                          &chunk_size_written,
7232                                          &total_size_written);
7233         if (ret < 0) {
7234                 if (ret == -EACCES)
7235                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7236                 if (ret == -EAGAIN)
7237                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7238                 else if (ret == -EBADF)
7239                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7240                 else if (ret == -EFBIG || ret == -ENOSPC)
7241                         rsp->hdr.Status = STATUS_DISK_FULL;
7242                 else if (ret == -EINVAL)
7243                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7244                 else if (ret == -EISDIR)
7245                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7246                 else if (ret == -E2BIG)
7247                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7248                 else
7249                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7250         }
7251
7252         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7253         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7254         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7255 out:
7256         ksmbd_fd_put(work, src_fp);
7257         ksmbd_fd_put(work, dst_fp);
7258         return ret;
7259 }
7260
7261 static __be32 idev_ipv4_address(struct in_device *idev)
7262 {
7263         __be32 addr = 0;
7264
7265         struct in_ifaddr *ifa;
7266
7267         rcu_read_lock();
7268         in_dev_for_each_ifa_rcu(ifa, idev) {
7269                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7270                         continue;
7271
7272                 addr = ifa->ifa_address;
7273                 break;
7274         }
7275         rcu_read_unlock();
7276         return addr;
7277 }
7278
7279 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7280                                         struct smb2_ioctl_rsp *rsp,
7281                                         unsigned int out_buf_len)
7282 {
7283         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7284         int nbytes = 0;
7285         struct net_device *netdev;
7286         struct sockaddr_storage_rsp *sockaddr_storage;
7287         unsigned int flags;
7288         unsigned long long speed;
7289
7290         rtnl_lock();
7291         for_each_netdev(&init_net, netdev) {
7292                 bool ipv4_set = false;
7293
7294                 if (netdev->type == ARPHRD_LOOPBACK)
7295                         continue;
7296
7297                 flags = dev_get_flags(netdev);
7298                 if (!(flags & IFF_RUNNING))
7299                         continue;
7300 ipv6_retry:
7301                 if (out_buf_len <
7302                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7303                         rtnl_unlock();
7304                         return -ENOSPC;
7305                 }
7306
7307                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7308                                 &rsp->Buffer[nbytes];
7309                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7310
7311                 nii_rsp->Capability = 0;
7312                 if (netdev->real_num_tx_queues > 1)
7313                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7314                 if (ksmbd_rdma_capable_netdev(netdev))
7315                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7316
7317                 nii_rsp->Next = cpu_to_le32(152);
7318                 nii_rsp->Reserved = 0;
7319
7320                 if (netdev->ethtool_ops->get_link_ksettings) {
7321                         struct ethtool_link_ksettings cmd;
7322
7323                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7324                         speed = cmd.base.speed;
7325                 } else {
7326                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7327                                     "speed is unknown, defaulting to 1Gb/sec");
7328                         speed = SPEED_1000;
7329                 }
7330
7331                 speed *= 1000000;
7332                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7333
7334                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7335                                         nii_rsp->SockAddr_Storage;
7336                 memset(sockaddr_storage, 0, 128);
7337
7338                 if (!ipv4_set) {
7339                         struct in_device *idev;
7340
7341                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7342                         sockaddr_storage->addr4.Port = 0;
7343
7344                         idev = __in_dev_get_rtnl(netdev);
7345                         if (!idev)
7346                                 continue;
7347                         sockaddr_storage->addr4.IPv4address =
7348                                                 idev_ipv4_address(idev);
7349                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7350                         ipv4_set = true;
7351                         goto ipv6_retry;
7352                 } else {
7353                         struct inet6_dev *idev6;
7354                         struct inet6_ifaddr *ifa;
7355                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7356
7357                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7358                         sockaddr_storage->addr6.Port = 0;
7359                         sockaddr_storage->addr6.FlowInfo = 0;
7360
7361                         idev6 = __in6_dev_get(netdev);
7362                         if (!idev6)
7363                                 continue;
7364
7365                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7366                                 if (ifa->flags & (IFA_F_TENTATIVE |
7367                                                         IFA_F_DEPRECATED))
7368                                         continue;
7369                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7370                                 break;
7371                         }
7372                         sockaddr_storage->addr6.ScopeId = 0;
7373                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7374                 }
7375         }
7376         rtnl_unlock();
7377
7378         /* zero if this is last one */
7379         if (nii_rsp)
7380                 nii_rsp->Next = 0;
7381
7382         rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7383         rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7384         return nbytes;
7385 }
7386
7387 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7388                                          struct validate_negotiate_info_req *neg_req,
7389                                          struct validate_negotiate_info_rsp *neg_rsp,
7390                                          unsigned int in_buf_len)
7391 {
7392         int ret = 0;
7393         int dialect;
7394
7395         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7396                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7397                 return -EINVAL;
7398
7399         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7400                                              neg_req->DialectCount);
7401         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7402                 ret = -EINVAL;
7403                 goto err_out;
7404         }
7405
7406         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7407                 ret = -EINVAL;
7408                 goto err_out;
7409         }
7410
7411         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7412                 ret = -EINVAL;
7413                 goto err_out;
7414         }
7415
7416         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7417                 ret = -EINVAL;
7418                 goto err_out;
7419         }
7420
7421         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7422         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7423         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7424         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7425 err_out:
7426         return ret;
7427 }
7428
7429 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7430                                         struct file_allocated_range_buffer *qar_req,
7431                                         struct file_allocated_range_buffer *qar_rsp,
7432                                         unsigned int in_count, unsigned int *out_count)
7433 {
7434         struct ksmbd_file *fp;
7435         loff_t start, length;
7436         int ret = 0;
7437
7438         *out_count = 0;
7439         if (in_count == 0)
7440                 return -EINVAL;
7441
7442         fp = ksmbd_lookup_fd_fast(work, id);
7443         if (!fp)
7444                 return -ENOENT;
7445
7446         start = le64_to_cpu(qar_req->file_offset);
7447         length = le64_to_cpu(qar_req->length);
7448
7449         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7450                                    qar_rsp, in_count, out_count);
7451         if (ret && ret != -E2BIG)
7452                 *out_count = 0;
7453
7454         ksmbd_fd_put(work, fp);
7455         return ret;
7456 }
7457
7458 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7459                                  unsigned int out_buf_len,
7460                                  struct smb2_ioctl_req *req,
7461                                  struct smb2_ioctl_rsp *rsp)
7462 {
7463         struct ksmbd_rpc_command *rpc_resp;
7464         char *data_buf = (char *)&req->Buffer[0];
7465         int nbytes = 0;
7466
7467         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7468                                    le32_to_cpu(req->InputCount));
7469         if (rpc_resp) {
7470                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7471                         /*
7472                          * set STATUS_SOME_NOT_MAPPED response
7473                          * for unknown domain sid.
7474                          */
7475                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7476                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7477                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7478                         goto out;
7479                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7480                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7481                         goto out;
7482                 }
7483
7484                 nbytes = rpc_resp->payload_sz;
7485                 if (rpc_resp->payload_sz > out_buf_len) {
7486                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7487                         nbytes = out_buf_len;
7488                 }
7489
7490                 if (!rpc_resp->payload_sz) {
7491                         rsp->hdr.Status =
7492                                 STATUS_UNEXPECTED_IO_ERROR;
7493                         goto out;
7494                 }
7495
7496                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7497         }
7498 out:
7499         kvfree(rpc_resp);
7500         return nbytes;
7501 }
7502
7503 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7504                                    struct file_sparse *sparse)
7505 {
7506         struct ksmbd_file *fp;
7507         struct user_namespace *user_ns;
7508         int ret = 0;
7509         __le32 old_fattr;
7510
7511         fp = ksmbd_lookup_fd_fast(work, id);
7512         if (!fp)
7513                 return -ENOENT;
7514         user_ns = file_mnt_user_ns(fp->filp);
7515
7516         old_fattr = fp->f_ci->m_fattr;
7517         if (sparse->SetSparse)
7518                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7519         else
7520                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7521
7522         if (fp->f_ci->m_fattr != old_fattr &&
7523             test_share_config_flag(work->tcon->share_conf,
7524                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7525                 struct xattr_dos_attrib da;
7526
7527                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7528                                                      fp->filp->f_path.dentry, &da);
7529                 if (ret <= 0)
7530                         goto out;
7531
7532                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7533                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7534                                                      fp->filp->f_path.dentry, &da);
7535                 if (ret)
7536                         fp->f_ci->m_fattr = old_fattr;
7537         }
7538
7539 out:
7540         ksmbd_fd_put(work, fp);
7541         return ret;
7542 }
7543
7544 static int fsctl_request_resume_key(struct ksmbd_work *work,
7545                                     struct smb2_ioctl_req *req,
7546                                     struct resume_key_ioctl_rsp *key_rsp)
7547 {
7548         struct ksmbd_file *fp;
7549
7550         fp = ksmbd_lookup_fd_slow(work,
7551                                   le64_to_cpu(req->VolatileFileId),
7552                                   le64_to_cpu(req->PersistentFileId));
7553         if (!fp)
7554                 return -ENOENT;
7555
7556         memset(key_rsp, 0, sizeof(*key_rsp));
7557         key_rsp->ResumeKey[0] = req->VolatileFileId;
7558         key_rsp->ResumeKey[1] = req->PersistentFileId;
7559         ksmbd_fd_put(work, fp);
7560
7561         return 0;
7562 }
7563
7564 /**
7565  * smb2_ioctl() - handler for smb2 ioctl command
7566  * @work:       smb work containing ioctl command buffer
7567  *
7568  * Return:      0 on success, otherwise error
7569  */
7570 int smb2_ioctl(struct ksmbd_work *work)
7571 {
7572         struct smb2_ioctl_req *req;
7573         struct smb2_ioctl_rsp *rsp;
7574         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7575         u64 id = KSMBD_NO_FID;
7576         struct ksmbd_conn *conn = work->conn;
7577         int ret = 0;
7578
7579         if (work->next_smb2_rcv_hdr_off) {
7580                 req = ksmbd_req_buf_next(work);
7581                 rsp = ksmbd_resp_buf_next(work);
7582                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
7583                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7584                                     work->compound_fid);
7585                         id = work->compound_fid;
7586                 }
7587         } else {
7588                 req = smb2_get_msg(work->request_buf);
7589                 rsp = smb2_get_msg(work->response_buf);
7590         }
7591
7592         if (!has_file_id(id))
7593                 id = le64_to_cpu(req->VolatileFileId);
7594
7595         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7596                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7597                 goto out;
7598         }
7599
7600         cnt_code = le32_to_cpu(req->CntCode);
7601         ret = smb2_calc_max_out_buf_len(work, 48,
7602                                         le32_to_cpu(req->MaxOutputResponse));
7603         if (ret < 0) {
7604                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7605                 goto out;
7606         }
7607         out_buf_len = (unsigned int)ret;
7608         in_buf_len = le32_to_cpu(req->InputCount);
7609
7610         switch (cnt_code) {
7611         case FSCTL_DFS_GET_REFERRALS:
7612         case FSCTL_DFS_GET_REFERRALS_EX:
7613                 /* Not support DFS yet */
7614                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7615                 goto out;
7616         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7617         {
7618                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7619
7620                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7621                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7622                         &rsp->Buffer[0];
7623
7624                 /*
7625                  * TODO: This is dummy implementation to pass smbtorture
7626                  * Need to check correct response later
7627                  */
7628                 memset(obj_buf->ObjectId, 0x0, 16);
7629                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7630                 memset(obj_buf->BirthObjectId, 0x0, 16);
7631                 memset(obj_buf->DomainId, 0x0, 16);
7632
7633                 break;
7634         }
7635         case FSCTL_PIPE_TRANSCEIVE:
7636                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7637                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7638                 break;
7639         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7640                 if (conn->dialect < SMB30_PROT_ID) {
7641                         ret = -EOPNOTSUPP;
7642                         goto out;
7643                 }
7644
7645                 if (in_buf_len < sizeof(struct validate_negotiate_info_req))
7646                         return -EINVAL;
7647
7648                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp))
7649                         return -EINVAL;
7650
7651                 ret = fsctl_validate_negotiate_info(conn,
7652                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7653                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7654                         in_buf_len);
7655                 if (ret < 0)
7656                         goto out;
7657
7658                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7659                 rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7660                 rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7661                 break;
7662         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7663                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7664                 if (ret < 0)
7665                         goto out;
7666                 nbytes = ret;
7667                 break;
7668         case FSCTL_REQUEST_RESUME_KEY:
7669                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7670                         ret = -EINVAL;
7671                         goto out;
7672                 }
7673
7674                 ret = fsctl_request_resume_key(work, req,
7675                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7676                 if (ret < 0)
7677                         goto out;
7678                 rsp->PersistentFileId = req->PersistentFileId;
7679                 rsp->VolatileFileId = req->VolatileFileId;
7680                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7681                 break;
7682         case FSCTL_COPYCHUNK:
7683         case FSCTL_COPYCHUNK_WRITE:
7684                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7685                         ksmbd_debug(SMB,
7686                                     "User does not have write permission\n");
7687                         ret = -EACCES;
7688                         goto out;
7689                 }
7690
7691                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7692                         ret = -EINVAL;
7693                         goto out;
7694                 }
7695
7696                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7697                         ret = -EINVAL;
7698                         goto out;
7699                 }
7700
7701                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7702                 rsp->VolatileFileId = req->VolatileFileId;
7703                 rsp->PersistentFileId = req->PersistentFileId;
7704                 fsctl_copychunk(work,
7705                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7706                                 le32_to_cpu(req->CntCode),
7707                                 le32_to_cpu(req->InputCount),
7708                                 le64_to_cpu(req->VolatileFileId),
7709                                 le64_to_cpu(req->PersistentFileId),
7710                                 rsp);
7711                 break;
7712         case FSCTL_SET_SPARSE:
7713                 if (in_buf_len < sizeof(struct file_sparse)) {
7714                         ret = -EINVAL;
7715                         goto out;
7716                 }
7717
7718                 ret = fsctl_set_sparse(work, id,
7719                                        (struct file_sparse *)&req->Buffer[0]);
7720                 if (ret < 0)
7721                         goto out;
7722                 break;
7723         case FSCTL_SET_ZERO_DATA:
7724         {
7725                 struct file_zero_data_information *zero_data;
7726                 struct ksmbd_file *fp;
7727                 loff_t off, len;
7728
7729                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7730                         ksmbd_debug(SMB,
7731                                     "User does not have write permission\n");
7732                         ret = -EACCES;
7733                         goto out;
7734                 }
7735
7736                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7737                         ret = -EINVAL;
7738                         goto out;
7739                 }
7740
7741                 zero_data =
7742                         (struct file_zero_data_information *)&req->Buffer[0];
7743
7744                 fp = ksmbd_lookup_fd_fast(work, id);
7745                 if (!fp) {
7746                         ret = -ENOENT;
7747                         goto out;
7748                 }
7749
7750                 off = le64_to_cpu(zero_data->FileOffset);
7751                 len = le64_to_cpu(zero_data->BeyondFinalZero) - off;
7752
7753                 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7754                 ksmbd_fd_put(work, fp);
7755                 if (ret < 0)
7756                         goto out;
7757                 break;
7758         }
7759         case FSCTL_QUERY_ALLOCATED_RANGES:
7760                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7761                         ret = -EINVAL;
7762                         goto out;
7763                 }
7764
7765                 ret = fsctl_query_allocated_ranges(work, id,
7766                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7767                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7768                         out_buf_len /
7769                         sizeof(struct file_allocated_range_buffer), &nbytes);
7770                 if (ret == -E2BIG) {
7771                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7772                 } else if (ret < 0) {
7773                         nbytes = 0;
7774                         goto out;
7775                 }
7776
7777                 nbytes *= sizeof(struct file_allocated_range_buffer);
7778                 break;
7779         case FSCTL_GET_REPARSE_POINT:
7780         {
7781                 struct reparse_data_buffer *reparse_ptr;
7782                 struct ksmbd_file *fp;
7783
7784                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7785                 fp = ksmbd_lookup_fd_fast(work, id);
7786                 if (!fp) {
7787                         pr_err("not found fp!!\n");
7788                         ret = -ENOENT;
7789                         goto out;
7790                 }
7791
7792                 reparse_ptr->ReparseTag =
7793                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7794                 reparse_ptr->ReparseDataLength = 0;
7795                 ksmbd_fd_put(work, fp);
7796                 nbytes = sizeof(struct reparse_data_buffer);
7797                 break;
7798         }
7799         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7800         {
7801                 struct ksmbd_file *fp_in, *fp_out = NULL;
7802                 struct duplicate_extents_to_file *dup_ext;
7803                 loff_t src_off, dst_off, length, cloned;
7804
7805                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7806                         ret = -EINVAL;
7807                         goto out;
7808                 }
7809
7810                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7811
7812                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7813                                              dup_ext->PersistentFileHandle);
7814                 if (!fp_in) {
7815                         pr_err("not found file handle in duplicate extent to file\n");
7816                         ret = -ENOENT;
7817                         goto out;
7818                 }
7819
7820                 fp_out = ksmbd_lookup_fd_fast(work, id);
7821                 if (!fp_out) {
7822                         pr_err("not found fp\n");
7823                         ret = -ENOENT;
7824                         goto dup_ext_out;
7825                 }
7826
7827                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7828                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7829                 length = le64_to_cpu(dup_ext->ByteCount);
7830                 cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp,
7831                                               dst_off, length, 0);
7832                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7833                         ret = -EOPNOTSUPP;
7834                         goto dup_ext_out;
7835                 } else if (cloned != length) {
7836                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7837                                                      fp_out->filp, dst_off, length, 0);
7838                         if (cloned != length) {
7839                                 if (cloned < 0)
7840                                         ret = cloned;
7841                                 else
7842                                         ret = -EINVAL;
7843                         }
7844                 }
7845
7846 dup_ext_out:
7847                 ksmbd_fd_put(work, fp_in);
7848                 ksmbd_fd_put(work, fp_out);
7849                 if (ret < 0)
7850                         goto out;
7851                 break;
7852         }
7853         default:
7854                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7855                             cnt_code);
7856                 ret = -EOPNOTSUPP;
7857                 goto out;
7858         }
7859
7860         rsp->CntCode = cpu_to_le32(cnt_code);
7861         rsp->InputCount = cpu_to_le32(0);
7862         rsp->InputOffset = cpu_to_le32(112);
7863         rsp->OutputOffset = cpu_to_le32(112);
7864         rsp->OutputCount = cpu_to_le32(nbytes);
7865         rsp->StructureSize = cpu_to_le16(49);
7866         rsp->Reserved = cpu_to_le16(0);
7867         rsp->Flags = cpu_to_le32(0);
7868         rsp->Reserved2 = cpu_to_le32(0);
7869         inc_rfc1001_len(work->response_buf, 48 + nbytes);
7870
7871         return 0;
7872
7873 out:
7874         if (ret == -EACCES)
7875                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7876         else if (ret == -ENOENT)
7877                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7878         else if (ret == -EOPNOTSUPP)
7879                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7880         else if (ret == -ENOSPC)
7881                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7882         else if (ret < 0 || rsp->hdr.Status == 0)
7883                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7884         smb2_set_err_rsp(work);
7885         return 0;
7886 }
7887
7888 /**
7889  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7890  * @work:       smb work containing oplock break command buffer
7891  *
7892  * Return:      0
7893  */
7894 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7895 {
7896         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
7897         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
7898         struct ksmbd_file *fp;
7899         struct oplock_info *opinfo = NULL;
7900         __le32 err = 0;
7901         int ret = 0;
7902         u64 volatile_id, persistent_id;
7903         char req_oplevel = 0, rsp_oplevel = 0;
7904         unsigned int oplock_change_type;
7905
7906         volatile_id = le64_to_cpu(req->VolatileFid);
7907         persistent_id = le64_to_cpu(req->PersistentFid);
7908         req_oplevel = req->OplockLevel;
7909         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7910                     volatile_id, persistent_id, req_oplevel);
7911
7912         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7913         if (!fp) {
7914                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7915                 smb2_set_err_rsp(work);
7916                 return;
7917         }
7918
7919         opinfo = opinfo_get(fp);
7920         if (!opinfo) {
7921                 pr_err("unexpected null oplock_info\n");
7922                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7923                 smb2_set_err_rsp(work);
7924                 ksmbd_fd_put(work, fp);
7925                 return;
7926         }
7927
7928         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7929                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7930                 goto err_out;
7931         }
7932
7933         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7934                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7935                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7936                 goto err_out;
7937         }
7938
7939         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7940              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7941             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7942              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7943                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7944                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7945         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7946                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7947                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7948                 oplock_change_type = OPLOCK_READ_TO_NONE;
7949         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7950                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7951                 err = STATUS_INVALID_DEVICE_STATE;
7952                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7953                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7954                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7955                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7956                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7957                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7958                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7959                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
7960                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7961                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7962                         oplock_change_type = OPLOCK_READ_TO_NONE;
7963                 } else {
7964                         oplock_change_type = 0;
7965                 }
7966         } else {
7967                 oplock_change_type = 0;
7968         }
7969
7970         switch (oplock_change_type) {
7971         case OPLOCK_WRITE_TO_READ:
7972                 ret = opinfo_write_to_read(opinfo);
7973                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
7974                 break;
7975         case OPLOCK_WRITE_TO_NONE:
7976                 ret = opinfo_write_to_none(opinfo);
7977                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7978                 break;
7979         case OPLOCK_READ_TO_NONE:
7980                 ret = opinfo_read_to_none(opinfo);
7981                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7982                 break;
7983         default:
7984                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
7985                        opinfo->level, rsp_oplevel);
7986         }
7987
7988         if (ret < 0) {
7989                 rsp->hdr.Status = err;
7990                 goto err_out;
7991         }
7992
7993         opinfo_put(opinfo);
7994         ksmbd_fd_put(work, fp);
7995         opinfo->op_state = OPLOCK_STATE_NONE;
7996         wake_up_interruptible_all(&opinfo->oplock_q);
7997
7998         rsp->StructureSize = cpu_to_le16(24);
7999         rsp->OplockLevel = rsp_oplevel;
8000         rsp->Reserved = 0;
8001         rsp->Reserved2 = 0;
8002         rsp->VolatileFid = cpu_to_le64(volatile_id);
8003         rsp->PersistentFid = cpu_to_le64(persistent_id);
8004         inc_rfc1001_len(work->response_buf, 24);
8005         return;
8006
8007 err_out:
8008         opinfo->op_state = OPLOCK_STATE_NONE;
8009         wake_up_interruptible_all(&opinfo->oplock_q);
8010
8011         opinfo_put(opinfo);
8012         ksmbd_fd_put(work, fp);
8013         smb2_set_err_rsp(work);
8014 }
8015
8016 static int check_lease_state(struct lease *lease, __le32 req_state)
8017 {
8018         if ((lease->new_state ==
8019              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8020             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8021                 lease->new_state = req_state;
8022                 return 0;
8023         }
8024
8025         if (lease->new_state == req_state)
8026                 return 0;
8027
8028         return 1;
8029 }
8030
8031 /**
8032  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8033  * @work:       smb work containing lease break command buffer
8034  *
8035  * Return:      0
8036  */
8037 static void smb21_lease_break_ack(struct ksmbd_work *work)
8038 {
8039         struct ksmbd_conn *conn = work->conn;
8040         struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
8041         struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
8042         struct oplock_info *opinfo;
8043         __le32 err = 0;
8044         int ret = 0;
8045         unsigned int lease_change_type;
8046         __le32 lease_state;
8047         struct lease *lease;
8048
8049         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8050                     le32_to_cpu(req->LeaseState));
8051         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8052         if (!opinfo) {
8053                 ksmbd_debug(OPLOCK, "file not opened\n");
8054                 smb2_set_err_rsp(work);
8055                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8056                 return;
8057         }
8058         lease = opinfo->o_lease;
8059
8060         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8061                 pr_err("unexpected lease break state 0x%x\n",
8062                        opinfo->op_state);
8063                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8064                 goto err_out;
8065         }
8066
8067         if (check_lease_state(lease, req->LeaseState)) {
8068                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8069                 ksmbd_debug(OPLOCK,
8070                             "req lease state: 0x%x, expected state: 0x%x\n",
8071                             req->LeaseState, lease->new_state);
8072                 goto err_out;
8073         }
8074
8075         if (!atomic_read(&opinfo->breaking_cnt)) {
8076                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8077                 goto err_out;
8078         }
8079
8080         /* check for bad lease state */
8081         if (req->LeaseState &
8082             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8083                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8084                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8085                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8086                 else
8087                         lease_change_type = OPLOCK_READ_TO_NONE;
8088                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8089                             le32_to_cpu(lease->state),
8090                             le32_to_cpu(req->LeaseState));
8091         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8092                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8093                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8094                 lease_change_type = OPLOCK_READ_TO_NONE;
8095                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8096                             le32_to_cpu(lease->state),
8097                             le32_to_cpu(req->LeaseState));
8098         } else {
8099                 /* valid lease state changes */
8100                 err = STATUS_INVALID_DEVICE_STATE;
8101                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8102                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8103                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8104                         else
8105                                 lease_change_type = OPLOCK_READ_TO_NONE;
8106                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8107                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8108                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8109                         else
8110                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8111                 } else {
8112                         lease_change_type = 0;
8113                 }
8114         }
8115
8116         switch (lease_change_type) {
8117         case OPLOCK_WRITE_TO_READ:
8118                 ret = opinfo_write_to_read(opinfo);
8119                 break;
8120         case OPLOCK_READ_HANDLE_TO_READ:
8121                 ret = opinfo_read_handle_to_read(opinfo);
8122                 break;
8123         case OPLOCK_WRITE_TO_NONE:
8124                 ret = opinfo_write_to_none(opinfo);
8125                 break;
8126         case OPLOCK_READ_TO_NONE:
8127                 ret = opinfo_read_to_none(opinfo);
8128                 break;
8129         default:
8130                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8131                             le32_to_cpu(lease->state),
8132                             le32_to_cpu(req->LeaseState));
8133         }
8134
8135         lease_state = lease->state;
8136         opinfo->op_state = OPLOCK_STATE_NONE;
8137         wake_up_interruptible_all(&opinfo->oplock_q);
8138         atomic_dec(&opinfo->breaking_cnt);
8139         wake_up_interruptible_all(&opinfo->oplock_brk);
8140         opinfo_put(opinfo);
8141
8142         if (ret < 0) {
8143                 rsp->hdr.Status = err;
8144                 goto err_out;
8145         }
8146
8147         rsp->StructureSize = cpu_to_le16(36);
8148         rsp->Reserved = 0;
8149         rsp->Flags = 0;
8150         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8151         rsp->LeaseState = lease_state;
8152         rsp->LeaseDuration = 0;
8153         inc_rfc1001_len(work->response_buf, 36);
8154         return;
8155
8156 err_out:
8157         opinfo->op_state = OPLOCK_STATE_NONE;
8158         wake_up_interruptible_all(&opinfo->oplock_q);
8159         atomic_dec(&opinfo->breaking_cnt);
8160         wake_up_interruptible_all(&opinfo->oplock_brk);
8161
8162         opinfo_put(opinfo);
8163         smb2_set_err_rsp(work);
8164 }
8165
8166 /**
8167  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8168  * @work:       smb work containing oplock/lease break command buffer
8169  *
8170  * Return:      0
8171  */
8172 int smb2_oplock_break(struct ksmbd_work *work)
8173 {
8174         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
8175         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
8176
8177         switch (le16_to_cpu(req->StructureSize)) {
8178         case OP_BREAK_STRUCT_SIZE_20:
8179                 smb20_oplock_break_ack(work);
8180                 break;
8181         case OP_BREAK_STRUCT_SIZE_21:
8182                 smb21_lease_break_ack(work);
8183                 break;
8184         default:
8185                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8186                             le16_to_cpu(req->StructureSize));
8187                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8188                 smb2_set_err_rsp(work);
8189         }
8190
8191         return 0;
8192 }
8193
8194 /**
8195  * smb2_notify() - handler for smb2 notify request
8196  * @work:   smb work containing notify command buffer
8197  *
8198  * Return:      0
8199  */
8200 int smb2_notify(struct ksmbd_work *work)
8201 {
8202         struct smb2_change_notify_req *req;
8203         struct smb2_change_notify_rsp *rsp;
8204
8205         WORK_BUFFERS(work, req, rsp);
8206
8207         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8208                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8209                 smb2_set_err_rsp(work);
8210                 return 0;
8211         }
8212
8213         smb2_set_err_rsp(work);
8214         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8215         return 0;
8216 }
8217
8218 /**
8219  * smb2_is_sign_req() - handler for checking packet signing status
8220  * @work:       smb work containing notify command buffer
8221  * @command:    SMB2 command id
8222  *
8223  * Return:      true if packed is signed, false otherwise
8224  */
8225 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8226 {
8227         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8228
8229         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8230             command != SMB2_NEGOTIATE_HE &&
8231             command != SMB2_SESSION_SETUP_HE &&
8232             command != SMB2_OPLOCK_BREAK_HE)
8233                 return true;
8234
8235         return false;
8236 }
8237
8238 /**
8239  * smb2_check_sign_req() - handler for req packet sign processing
8240  * @work:   smb work containing notify command buffer
8241  *
8242  * Return:      1 on success, 0 otherwise
8243  */
8244 int smb2_check_sign_req(struct ksmbd_work *work)
8245 {
8246         struct smb2_hdr *hdr;
8247         char signature_req[SMB2_SIGNATURE_SIZE];
8248         char signature[SMB2_HMACSHA256_SIZE];
8249         struct kvec iov[1];
8250         size_t len;
8251
8252         hdr = smb2_get_msg(work->request_buf);
8253         if (work->next_smb2_rcv_hdr_off)
8254                 hdr = ksmbd_req_buf_next(work);
8255
8256         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8257                 len = get_rfc1002_len(work->request_buf);
8258         else if (hdr->NextCommand)
8259                 len = le32_to_cpu(hdr->NextCommand);
8260         else
8261                 len = get_rfc1002_len(work->request_buf) -
8262                         work->next_smb2_rcv_hdr_off;
8263
8264         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8265         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8266
8267         iov[0].iov_base = (char *)&hdr->ProtocolId;
8268         iov[0].iov_len = len;
8269
8270         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8271                                 signature))
8272                 return 0;
8273
8274         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8275                 pr_err("bad smb2 signature\n");
8276                 return 0;
8277         }
8278
8279         return 1;
8280 }
8281
8282 /**
8283  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8284  * @work:   smb work containing notify command buffer
8285  *
8286  */
8287 void smb2_set_sign_rsp(struct ksmbd_work *work)
8288 {
8289         struct smb2_hdr *hdr;
8290         struct smb2_hdr *req_hdr;
8291         char signature[SMB2_HMACSHA256_SIZE];
8292         struct kvec iov[2];
8293         size_t len;
8294         int n_vec = 1;
8295
8296         hdr = smb2_get_msg(work->response_buf);
8297         if (work->next_smb2_rsp_hdr_off)
8298                 hdr = ksmbd_resp_buf_next(work);
8299
8300         req_hdr = ksmbd_req_buf_next(work);
8301
8302         if (!work->next_smb2_rsp_hdr_off) {
8303                 len = get_rfc1002_len(work->response_buf);
8304                 if (req_hdr->NextCommand)
8305                         len = ALIGN(len, 8);
8306         } else {
8307                 len = get_rfc1002_len(work->response_buf) -
8308                         work->next_smb2_rsp_hdr_off;
8309                 len = ALIGN(len, 8);
8310         }
8311
8312         if (req_hdr->NextCommand)
8313                 hdr->NextCommand = cpu_to_le32(len);
8314
8315         hdr->Flags |= SMB2_FLAGS_SIGNED;
8316         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8317
8318         iov[0].iov_base = (char *)&hdr->ProtocolId;
8319         iov[0].iov_len = len;
8320
8321         if (work->aux_payload_sz) {
8322                 iov[0].iov_len -= work->aux_payload_sz;
8323
8324                 iov[1].iov_base = work->aux_payload_buf;
8325                 iov[1].iov_len = work->aux_payload_sz;
8326                 n_vec++;
8327         }
8328
8329         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8330                                  signature))
8331                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8332 }
8333
8334 /**
8335  * smb3_check_sign_req() - handler for req packet sign processing
8336  * @work:   smb work containing notify command buffer
8337  *
8338  * Return:      1 on success, 0 otherwise
8339  */
8340 int smb3_check_sign_req(struct ksmbd_work *work)
8341 {
8342         struct ksmbd_conn *conn = work->conn;
8343         char *signing_key;
8344         struct smb2_hdr *hdr;
8345         struct channel *chann;
8346         char signature_req[SMB2_SIGNATURE_SIZE];
8347         char signature[SMB2_CMACAES_SIZE];
8348         struct kvec iov[1];
8349         size_t len;
8350
8351         hdr = smb2_get_msg(work->request_buf);
8352         if (work->next_smb2_rcv_hdr_off)
8353                 hdr = ksmbd_req_buf_next(work);
8354
8355         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8356                 len = get_rfc1002_len(work->request_buf);
8357         else if (hdr->NextCommand)
8358                 len = le32_to_cpu(hdr->NextCommand);
8359         else
8360                 len = get_rfc1002_len(work->request_buf) -
8361                         work->next_smb2_rcv_hdr_off;
8362
8363         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8364                 signing_key = work->sess->smb3signingkey;
8365         } else {
8366                 chann = lookup_chann_list(work->sess, conn);
8367                 if (!chann)
8368                         return 0;
8369                 signing_key = chann->smb3signingkey;
8370         }
8371
8372         if (!signing_key) {
8373                 pr_err("SMB3 signing key is not generated\n");
8374                 return 0;
8375         }
8376
8377         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8378         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8379         iov[0].iov_base = (char *)&hdr->ProtocolId;
8380         iov[0].iov_len = len;
8381
8382         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8383                 return 0;
8384
8385         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8386                 pr_err("bad smb2 signature\n");
8387                 return 0;
8388         }
8389
8390         return 1;
8391 }
8392
8393 /**
8394  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8395  * @work:   smb work containing notify command buffer
8396  *
8397  */
8398 void smb3_set_sign_rsp(struct ksmbd_work *work)
8399 {
8400         struct ksmbd_conn *conn = work->conn;
8401         struct smb2_hdr *req_hdr, *hdr;
8402         struct channel *chann;
8403         char signature[SMB2_CMACAES_SIZE];
8404         struct kvec iov[2];
8405         int n_vec = 1;
8406         size_t len;
8407         char *signing_key;
8408
8409         hdr = smb2_get_msg(work->response_buf);
8410         if (work->next_smb2_rsp_hdr_off)
8411                 hdr = ksmbd_resp_buf_next(work);
8412
8413         req_hdr = ksmbd_req_buf_next(work);
8414
8415         if (!work->next_smb2_rsp_hdr_off) {
8416                 len = get_rfc1002_len(work->response_buf);
8417                 if (req_hdr->NextCommand)
8418                         len = ALIGN(len, 8);
8419         } else {
8420                 len = get_rfc1002_len(work->response_buf) -
8421                         work->next_smb2_rsp_hdr_off;
8422                 len = ALIGN(len, 8);
8423         }
8424
8425         if (conn->binding == false &&
8426             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8427                 signing_key = work->sess->smb3signingkey;
8428         } else {
8429                 chann = lookup_chann_list(work->sess, work->conn);
8430                 if (!chann)
8431                         return;
8432                 signing_key = chann->smb3signingkey;
8433         }
8434
8435         if (!signing_key)
8436                 return;
8437
8438         if (req_hdr->NextCommand)
8439                 hdr->NextCommand = cpu_to_le32(len);
8440
8441         hdr->Flags |= SMB2_FLAGS_SIGNED;
8442         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8443         iov[0].iov_base = (char *)&hdr->ProtocolId;
8444         iov[0].iov_len = len;
8445         if (work->aux_payload_sz) {
8446                 iov[0].iov_len -= work->aux_payload_sz;
8447                 iov[1].iov_base = work->aux_payload_buf;
8448                 iov[1].iov_len = work->aux_payload_sz;
8449                 n_vec++;
8450         }
8451
8452         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8453                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8454 }
8455
8456 /**
8457  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8458  * @work:   smb work containing response buffer
8459  *
8460  */
8461 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8462 {
8463         struct ksmbd_conn *conn = work->conn;
8464         struct ksmbd_session *sess = work->sess;
8465         struct smb2_hdr *req, *rsp;
8466
8467         if (conn->dialect != SMB311_PROT_ID)
8468                 return;
8469
8470         WORK_BUFFERS(work, req, rsp);
8471
8472         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8473             conn->preauth_info)
8474                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8475                                                  conn->preauth_info->Preauth_HashValue);
8476
8477         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8478                 __u8 *hash_value;
8479
8480                 if (conn->binding) {
8481                         struct preauth_session *preauth_sess;
8482
8483                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8484                         if (!preauth_sess)
8485                                 return;
8486                         hash_value = preauth_sess->Preauth_HashValue;
8487                 } else {
8488                         hash_value = sess->Preauth_HashValue;
8489                         if (!hash_value)
8490                                 return;
8491                 }
8492                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8493                                                  hash_value);
8494         }
8495 }
8496
8497 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8498 {
8499         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8500         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8501         unsigned int orig_len = get_rfc1002_len(old_buf);
8502
8503         memset(tr_buf, 0, sizeof(struct smb2_transform_hdr) + 4);
8504         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8505         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8506         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8507         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8508             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8509                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8510         else
8511                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8512         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8513         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8514         inc_rfc1001_len(tr_buf, orig_len);
8515 }
8516
8517 int smb3_encrypt_resp(struct ksmbd_work *work)
8518 {
8519         char *buf = work->response_buf;
8520         struct kvec iov[3];
8521         int rc = -ENOMEM;
8522         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8523
8524         if (ARRAY_SIZE(iov) < rq_nvec)
8525                 return -ENOMEM;
8526
8527         work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8528         if (!work->tr_buf)
8529                 return rc;
8530
8531         /* fill transform header */
8532         fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
8533
8534         iov[0].iov_base = work->tr_buf;
8535         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8536         buf_size += iov[0].iov_len - 4;
8537
8538         iov[1].iov_base = buf + 4;
8539         iov[1].iov_len = get_rfc1002_len(buf);
8540         if (work->aux_payload_sz) {
8541                 iov[1].iov_len = work->resp_hdr_sz - 4;
8542
8543                 iov[2].iov_base = work->aux_payload_buf;
8544                 iov[2].iov_len = work->aux_payload_sz;
8545                 buf_size += iov[2].iov_len;
8546         }
8547         buf_size += iov[1].iov_len;
8548         work->resp_hdr_sz = iov[1].iov_len;
8549
8550         rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
8551         if (rc)
8552                 return rc;
8553
8554         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8555         *(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
8556
8557         return rc;
8558 }
8559
8560 bool smb3_is_transform_hdr(void *buf)
8561 {
8562         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8563
8564         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8565 }
8566
8567 int smb3_decrypt_req(struct ksmbd_work *work)
8568 {
8569         struct ksmbd_conn *conn = work->conn;
8570         struct ksmbd_session *sess;
8571         char *buf = work->request_buf;
8572         unsigned int pdu_length = get_rfc1002_len(buf);
8573         struct kvec iov[2];
8574         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8575         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8576         int rc = 0;
8577
8578         if (buf_data_size < sizeof(struct smb2_hdr)) {
8579                 pr_err("Transform message is too small (%u)\n",
8580                        pdu_length);
8581                 return -ECONNABORTED;
8582         }
8583
8584         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8585                 pr_err("Transform message is broken\n");
8586                 return -ECONNABORTED;
8587         }
8588
8589         sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
8590         if (!sess) {
8591                 pr_err("invalid session id(%llx) in transform header\n",
8592                        le64_to_cpu(tr_hdr->SessionId));
8593                 return -ECONNABORTED;
8594         }
8595
8596         iov[0].iov_base = buf;
8597         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8598         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8599         iov[1].iov_len = buf_data_size;
8600         rc = ksmbd_crypt_message(conn, iov, 2, 0);
8601         if (rc)
8602                 return rc;
8603
8604         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8605         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8606
8607         return rc;
8608 }
8609
8610 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8611 {
8612         struct ksmbd_conn *conn = work->conn;
8613         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8614
8615         if (conn->dialect < SMB30_PROT_ID)
8616                 return false;
8617
8618         if (work->next_smb2_rcv_hdr_off)
8619                 rsp = ksmbd_resp_buf_next(work);
8620
8621         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8622             rsp->Status == STATUS_SUCCESS)
8623                 return true;
8624         return false;
8625 }