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