fs/smb/client/smb2ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  SMB2 version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include <linux/falloc.h>
  11 #include <linux/scatterlist.h>
  12 #include <linux/uuid.h>
  13 #include <linux/sort.h>
  14 #include <crypto/aead.h>
  15 #include <linux/fiemap.h>
  16 #include <uapi/linux/magic.h>
  17 #include "cifsfs.h"
  18 #include "cifsglob.h"
  19 #include "smb2pdu.h"
  20 #include "smb2proto.h"
  21 #include "cifsproto.h"
  22 #include "cifs_debug.h"
  23 #include "cifs_unicode.h"
  24 #include "smb2status.h"
  25 #include "smb2glob.h"
  26 #include "cifs_ioctl.h"
  27 #include "smbdirect.h"
  28 #include "fscache.h"
  29 #include "fs_context.h"
  30 #include "cached_dir.h"
  31
  32 /* Change credits for different ops and return the total number of credits */
  33 static int
  34 change_conf(struct TCP_Server_Info *server)
  35 {
  36         server->credits += server->echo_credits + server->oplock_credits;
  37         if (server->credits > server->max_credits)
  38                 server->credits = server->max_credits;
  39         server->oplock_credits = server->echo_credits = 0;
  40         switch (server->credits) {
  41         case 0:
  42                 return 0;
  43         case 1:
  44                 server->echoes = false;
  45                 server->oplocks = false;
  46                 break;
  47         case 2:
  48                 server->echoes = true;
  49                 server->oplocks = false;
  50                 server->echo_credits = 1;
  51                 break;
  52         default:
  53                 server->echoes = true;
  54                 if (enable_oplocks) {
  55                         server->oplocks = true;
  56                         server->oplock_credits = 1;
  57                 } else
  58                         server->oplocks = false;
  59
  60                 server->echo_credits = 1;
  61         }
  62         server->credits -= server->echo_credits + server->oplock_credits;
  63         return server->credits + server->echo_credits + server->oplock_credits;
  64 }
  65
  66 static void
  67 smb2_add_credits(struct TCP_Server_Info *server,
  68                  const struct cifs_credits *credits, const int optype)
  69 {
  70         int *val, rc = -1;
  71         int scredits, in_flight;
  72         unsigned int add = credits->value;
  73         unsigned int instance = credits->instance;
  74         bool reconnect_detected = false;
  75         bool reconnect_with_invalid_credits = false;
  76
  77         spin_lock(&server->req_lock);
  78         val = server->ops->get_credits_field(server, optype);
  79
  80         /* eg found case where write overlapping reconnect messed up credits */
  81         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  82                 reconnect_with_invalid_credits = true;
  83
  84         if ((instance == 0) || (instance == server->reconnect_instance))
  85                 *val += add;
  86         else
  87                 reconnect_detected = true;
  88
  89         if (*val > 65000) {
  90                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  91                 pr_warn_once("server overflowed SMB3 credits\n");
  92                 trace_smb3_overflow_credits(server->CurrentMid,
  93                                             server->conn_id, server->hostname, *val,
  94                                             add, server->in_flight);
  95         }
  96         WARN_ON_ONCE(server->in_flight == 0);
  97         server->in_flight--;
  98         if (server->in_flight == 0 &&
  99            ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
 100            ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
 101                 rc = change_conf(server);
 102         /*
 103          * Sometimes server returns 0 credits on oplock break ack - we need to
 104          * rebalance credits in this case.
 105          */
 106         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
 107                  server->oplocks) {
 108                 if (server->credits > 1) {
 109                         server->credits--;
 110                         server->oplock_credits++;
 111                 }
 112         } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
 113                    ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
 114                 /* if now have too many oplock credits, rebalance so don't starve normal ops */
 115                 change_conf(server);
 116
 117         scredits = *val;
 118         in_flight = server->in_flight;
 119         spin_unlock(&server->req_lock);
 120         wake_up(&server->request_q);
 121
 122         if (reconnect_detected) {
 123                 trace_smb3_reconnect_detected(server->CurrentMid,
 124                         server->conn_id, server->hostname, scredits, add, in_flight);
 125
 126                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 127                          add, instance);
 128         }
 129
 130         if (reconnect_with_invalid_credits) {
 131                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 132                         server->conn_id, server->hostname, scredits, add, in_flight);
 133                 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
 134                          optype, scredits, add);
 135         }
 136
 137         spin_lock(&server->srv_lock);
 138         if (server->tcpStatus == CifsNeedReconnect
 139             || server->tcpStatus == CifsExiting) {
 140                 spin_unlock(&server->srv_lock);
 141                 return;
 142         }
 143         spin_unlock(&server->srv_lock);
 144
 145         switch (rc) {
 146         case -1:
 147                 /* change_conf hasn't been executed */
 148                 break;
 149         case 0:
 150                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 151                 break;
 152         case 1:
 153                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 154                 break;
 155         case 2:
 156                 cifs_dbg(FYI, "disabling oplocks\n");
 157                 break;
 158         default:
 159                 /* change_conf rebalanced credits for different types */
 160                 break;
 161         }
 162
 163         trace_smb3_add_credits(server->CurrentMid,
 164                         server->conn_id, server->hostname, scredits, add, in_flight);
 165         cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
 166 }
 167
 168 static void
 169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 170 {
 171         int scredits, in_flight;
 172
 173         spin_lock(&server->req_lock);
 174         server->credits = val;
 175         if (val == 1) {
 176                 server->reconnect_instance++;
 177                 /*
 178                  * ChannelSequence updated for all channels in primary channel so that consistent
 179                  * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
 180                  */
 181                 if (SERVER_IS_CHAN(server))
 182                         server->primary_server->channel_sequence_num++;
 183                 else
 184                         server->channel_sequence_num++;
 185         }
 186         scredits = server->credits;
 187         in_flight = server->in_flight;
 188         spin_unlock(&server->req_lock);
 189
 190         trace_smb3_set_credits(server->CurrentMid,
 191                         server->conn_id, server->hostname, scredits, val, in_flight);
 192         cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
 193
 194         /* don't log while holding the lock */
 195         if (val == 1)
 196                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 197 }
 198
 199 static int *
 200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 201 {
 202         switch (optype) {
 203         case CIFS_ECHO_OP:
 204                 return &server->echo_credits;
 205         case CIFS_OBREAK_OP:
 206                 return &server->oplock_credits;
 207         default:
 208                 return &server->credits;
 209         }
 210 }
 211
 212 static unsigned int
 213 smb2_get_credits(struct mid_q_entry *mid)
 214 {
 215         return mid->credits_received;
 216 }
 217
 218 static int
 219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 220                       unsigned int *num, struct cifs_credits *credits)
 221 {
 222         int rc = 0;
 223         unsigned int scredits, in_flight;
 224
 225         spin_lock(&server->req_lock);
 226         while (1) {
 227                 spin_unlock(&server->req_lock);
 228
 229                 spin_lock(&server->srv_lock);
 230                 if (server->tcpStatus == CifsExiting) {
 231                         spin_unlock(&server->srv_lock);
 232                         return -ENOENT;
 233                 }
 234                 spin_unlock(&server->srv_lock);
 235
 236                 spin_lock(&server->req_lock);
 237                 if (server->credits <= 0) {
 238                         spin_unlock(&server->req_lock);
 239                         cifs_num_waiters_inc(server);
 240                         rc = wait_event_killable(server->request_q,
 241                                 has_credits(server, &server->credits, 1));
 242                         cifs_num_waiters_dec(server);
 243                         if (rc)
 244                                 return rc;
 245                         spin_lock(&server->req_lock);
 246                 } else {
 247                         scredits = server->credits;
 248                         /* can deadlock with reopen */
 249                         if (scredits <= 8) {
 250                                 *num = SMB2_MAX_BUFFER_SIZE;
 251                                 credits->value = 0;
 252                                 credits->instance = 0;
 253                                 break;
 254                         }
 255
 256                         /* leave some credits for reopen and other ops */
 257                         scredits -= 8;
 258                         *num = min_t(unsigned int, size,
 259                                      scredits * SMB2_MAX_BUFFER_SIZE);
 260
 261                         credits->value =
 262                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 263                         credits->instance = server->reconnect_instance;
 264                         server->credits -= credits->value;
 265                         server->in_flight++;
 266                         if (server->in_flight > server->max_in_flight)
 267                                 server->max_in_flight = server->in_flight;
 268                         break;
 269                 }
 270         }
 271         scredits = server->credits;
 272         in_flight = server->in_flight;
 273         spin_unlock(&server->req_lock);
 274
 275         trace_smb3_wait_credits(server->CurrentMid,
 276                         server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
 277         cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
 278                         __func__, credits->value, scredits);
 279
 280         return rc;
 281 }
 282
 283 static int
 284 smb2_adjust_credits(struct TCP_Server_Info *server,
 285                     struct cifs_credits *credits,
 286                     const unsigned int payload_size)
 287 {
 288         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 289         int scredits, in_flight;
 290
 291         if (!credits->value || credits->value == new_val)
 292                 return 0;
 293
 294         if (credits->value < new_val) {
 295                 trace_smb3_too_many_credits(server->CurrentMid,
 296                                 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
 297                 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
 298                                 credits->value, new_val);
 299
 300                 return -EOPNOTSUPP;
 301         }
 302
 303         spin_lock(&server->req_lock);
 304
 305         if (server->reconnect_instance != credits->instance) {
 306                 scredits = server->credits;
 307                 in_flight = server->in_flight;
 308                 spin_unlock(&server->req_lock);
 309
 310                 trace_smb3_reconnect_detected(server->CurrentMid,
 311                         server->conn_id, server->hostname, scredits,
 312                         credits->value - new_val, in_flight);
 313                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 314                          credits->value - new_val);
 315                 return -EAGAIN;
 316         }
 317
 318         server->credits += credits->value - new_val;
 319         scredits = server->credits;
 320         in_flight = server->in_flight;
 321         spin_unlock(&server->req_lock);
 322         wake_up(&server->request_q);
 323
 324         trace_smb3_adj_credits(server->CurrentMid,
 325                         server->conn_id, server->hostname, scredits,
 326                         credits->value - new_val, in_flight);
 327         cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
 328                         __func__, credits->value - new_val, scredits);
 329
 330         credits->value = new_val;
 331
 332         return 0;
 333 }
 334
 335 static __u64
 336 smb2_get_next_mid(struct TCP_Server_Info *server)
 337 {
 338         __u64 mid;
 339         /* for SMB2 we need the current value */
 340         spin_lock(&server->mid_lock);
 341         mid = server->CurrentMid++;
 342         spin_unlock(&server->mid_lock);
 343         return mid;
 344 }
 345
 346 static void
 347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 348 {
 349         spin_lock(&server->mid_lock);
 350         if (server->CurrentMid >= val)
 351                 server->CurrentMid -= val;
 352         spin_unlock(&server->mid_lock);
 353 }
 354
 355 static struct mid_q_entry *
 356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
 357 {
 358         struct mid_q_entry *mid;
 359         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 360         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 361
 362         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 363                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 364                 return NULL;
 365         }
 366
 367         spin_lock(&server->mid_lock);
 368         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 369                 if ((mid->mid == wire_mid) &&
 370                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 371                     (mid->command == shdr->Command)) {
 372                         kref_get(&mid->refcount);
 373                         if (dequeue) {
 374                                 list_del_init(&mid->qhead);
 375                                 mid->mid_flags |= MID_DELETED;
 376                         }
 377                         spin_unlock(&server->mid_lock);
 378                         return mid;
 379                 }
 380         }
 381         spin_unlock(&server->mid_lock);
 382         return NULL;
 383 }
 384
 385 static struct mid_q_entry *
 386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 387 {
 388         return __smb2_find_mid(server, buf, false);
 389 }
 390
 391 static struct mid_q_entry *
 392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
 393 {
 394         return __smb2_find_mid(server, buf, true);
 395 }
 396
 397 static void
 398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 399 {
 400 #ifdef CONFIG_CIFS_DEBUG2
 401         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
 402
 403         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 404                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 405                  shdr->Id.SyncId.ProcessId);
 406         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 407                  server->ops->calc_smb_size(buf));
 408 #endif
 409 }
 410
 411 static bool
 412 smb2_need_neg(struct TCP_Server_Info *server)
 413 {
 414         return server->max_read == 0;
 415 }
 416
 417 static int
 418 smb2_negotiate(const unsigned int xid,
 419                struct cifs_ses *ses,
 420                struct TCP_Server_Info *server)
 421 {
 422         int rc;
 423
 424         spin_lock(&server->mid_lock);
 425         server->CurrentMid = 0;
 426         spin_unlock(&server->mid_lock);
 427         rc = SMB2_negotiate(xid, ses, server);
 428         /* BB we probably don't need to retry with modern servers */
 429         if (rc == -EAGAIN)
 430                 rc = -EHOSTDOWN;
 431         return rc;
 432 }
 433
 434 static unsigned int
 435 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 436 {
 437         struct TCP_Server_Info *server = tcon->ses->server;
 438         unsigned int wsize;
 439
 440         /* start with specified wsize, or default */
 441         wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
 442         wsize = min_t(unsigned int, wsize, server->max_write);
 443         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 444                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 445
 446         return wsize;
 447 }
 448
 449 static unsigned int
 450 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 451 {
 452         struct TCP_Server_Info *server = tcon->ses->server;
 453         unsigned int wsize;
 454
 455         /* start with specified wsize, or default */
 456         wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
 457         wsize = min_t(unsigned int, wsize, server->max_write);
 458 #ifdef CONFIG_CIFS_SMB_DIRECT
 459         if (server->rdma) {
 460                 if (server->sign)
 461                         /*
 462                          * Account for SMB2 data transfer packet header and
 463                          * possible encryption header
 464                          */
 465                         wsize = min_t(unsigned int,
 466                                 wsize,
 467                                 server->smbd_conn->max_fragmented_send_size -
 468                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 469                                         sizeof(struct smb2_transform_hdr));
 470                 else
 471                         wsize = min_t(unsigned int,
 472                                 wsize, server->smbd_conn->max_readwrite_size);
 473         }
 474 #endif
 475         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 476                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 477
 478         return wsize;
 479 }
 480
 481 static unsigned int
 482 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 483 {
 484         struct TCP_Server_Info *server = tcon->ses->server;
 485         unsigned int rsize;
 486
 487         /* start with specified rsize, or default */
 488         rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
 489         rsize = min_t(unsigned int, rsize, server->max_read);
 490
 491         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 492                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 493
 494         return rsize;
 495 }
 496
 497 static unsigned int
 498 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
 499 {
 500         struct TCP_Server_Info *server = tcon->ses->server;
 501         unsigned int rsize;
 502
 503         /* start with specified rsize, or default */
 504         rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
 505         rsize = min_t(unsigned int, rsize, server->max_read);
 506 #ifdef CONFIG_CIFS_SMB_DIRECT
 507         if (server->rdma) {
 508                 if (server->sign)
 509                         /*
 510                          * Account for SMB2 data transfer packet header and
 511                          * possible encryption header
 512                          */
 513                         rsize = min_t(unsigned int,
 514                                 rsize,
 515                                 server->smbd_conn->max_fragmented_recv_size -
 516                                         SMB2_READWRITE_PDU_HEADER_SIZE -
 517                                         sizeof(struct smb2_transform_hdr));
 518                 else
 519                         rsize = min_t(unsigned int,
 520                                 rsize, server->smbd_conn->max_readwrite_size);
 521         }
 522 #endif
 523
 524         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 525                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 526
 527         return rsize;
 528 }
 529
 530 /*
 531  * compare two interfaces a and b
 532  * return 0 if everything matches.
 533  * return 1 if a is rdma capable, or rss capable, or has higher link speed
 534  * return -1 otherwise.
 535  */
 536 static int
 537 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
 538 {
 539         int cmp_ret = 0;
 540
 541         WARN_ON(!a || !b);
 542         if (a->rdma_capable == b->rdma_capable) {
 543                 if (a->rss_capable == b->rss_capable) {
 544                         if (a->speed == b->speed) {
 545                                 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
 546                                                           (struct sockaddr *) &b->sockaddr);
 547                                 if (!cmp_ret)
 548                                         return 0;
 549                                 else if (cmp_ret > 0)
 550                                         return 1;
 551                                 else
 552                                         return -1;
 553                         } else if (a->speed > b->speed)
 554                                 return 1;
 555                         else
 556                                 return -1;
 557                 } else if (a->rss_capable > b->rss_capable)
 558                         return 1;
 559                 else
 560                         return -1;
 561         } else if (a->rdma_capable > b->rdma_capable)
 562                 return 1;
 563         else
 564                 return -1;
 565 }
 566
 567 static int
 568 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 569                         size_t buf_len, struct cifs_ses *ses, bool in_mount)
 570 {
 571         struct network_interface_info_ioctl_rsp *p;
 572         struct sockaddr_in *addr4;
 573         struct sockaddr_in6 *addr6;
 574         struct iface_info_ipv4 *p4;
 575         struct iface_info_ipv6 *p6;
 576         struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
 577         struct cifs_server_iface tmp_iface;
 578         ssize_t bytes_left;
 579         size_t next = 0;
 580         int nb_iface = 0;
 581         int rc = 0, ret = 0;
 582
 583         bytes_left = buf_len;
 584         p = buf;
 585
 586         spin_lock(&ses->iface_lock);
 587         /* do not query too frequently, this time with lock held */
 588         if (ses->iface_last_update &&
 589             time_before(jiffies, ses->iface_last_update +
 590                         (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
 591                 spin_unlock(&ses->iface_lock);
 592                 return 0;
 593         }
 594
 595         /*
 596          * Go through iface_list and do kref_put to remove
 597          * any unused ifaces. ifaces in use will be removed
 598          * when the last user calls a kref_put on it
 599          */
 600         list_for_each_entry_safe(iface, niface, &ses->iface_list,
 601                                  iface_head) {
 602                 iface->is_active = 0;
 603                 kref_put(&iface->refcount, release_iface);
 604                 ses->iface_count--;
 605         }
 606         spin_unlock(&ses->iface_lock);
 607
 608         /*
 609          * Samba server e.g. can return an empty interface list in some cases,
 610          * which would only be a problem if we were requesting multichannel
 611          */
 612         if (bytes_left == 0) {
 613                 /* avoid spamming logs every 10 minutes, so log only in mount */
 614                 if ((ses->chan_max > 1) && in_mount)
 615                         cifs_dbg(VFS,
 616                                  "multichannel not available\n"
 617                                  "Empty network interface list returned by server %s\n",
 618                                  ses->server->hostname);
 619                 rc = -EINVAL;
 620                 goto out;
 621         }
 622
 623         while (bytes_left >= sizeof(*p)) {
 624                 memset(&tmp_iface, 0, sizeof(tmp_iface));
 625                 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
 626                 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
 627                 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
 628
 629                 switch (p->Family) {
 630                 /*
 631                  * The kernel and wire socket structures have the same
 632                  * layout and use network byte order but make the
 633                  * conversion explicit in case either one changes.
 634                  */
 635                 case INTERNETWORK:
 636                         addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
 637                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 638                         addr4->sin_family = AF_INET;
 639                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 640
 641                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 642                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 643
 644                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 645                                  &addr4->sin_addr);
 646                         break;
 647                 case INTERNETWORKV6:
 648                         addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
 649                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 650                         addr6->sin6_family = AF_INET6;
 651                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 652
 653                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 654                         addr6->sin6_flowinfo = 0;
 655                         addr6->sin6_scope_id = 0;
 656                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 657
 658                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 659                                  &addr6->sin6_addr);
 660                         break;
 661                 default:
 662                         cifs_dbg(VFS,
 663                                  "%s: skipping unsupported socket family\n",
 664                                  __func__);
 665                         goto next_iface;
 666                 }
 667
 668                 /*
 669                  * The iface_list is assumed to be sorted by speed.
 670                  * Check if the new interface exists in that list.
 671                  * NEVER change iface. it could be in use.
 672                  * Add a new one instead
 673                  */
 674                 spin_lock(&ses->iface_lock);
 675                 list_for_each_entry_safe(iface, niface, &ses->iface_list,
 676                                          iface_head) {
 677                         ret = iface_cmp(iface, &tmp_iface);
 678                         if (!ret) {
 679                                 /* just get a ref so that it doesn't get picked/freed */
 680                                 iface->is_active = 1;
 681                                 kref_get(&iface->refcount);
 682                                 ses->iface_count++;
 683                                 spin_unlock(&ses->iface_lock);
 684                                 goto next_iface;
 685                         } else if (ret < 0) {
 686                                 /* all remaining ifaces are slower */
 687                                 kref_get(&iface->refcount);
 688                                 break;
 689                         }
 690                 }
 691                 spin_unlock(&ses->iface_lock);
 692
 693                 /* no match. insert the entry in the list */
 694                 info = kmalloc(sizeof(struct cifs_server_iface),
 695                                GFP_KERNEL);
 696                 if (!info) {
 697                         rc = -ENOMEM;
 698                         goto out;
 699                 }
 700                 memcpy(info, &tmp_iface, sizeof(tmp_iface));
 701
 702                 /* add this new entry to the list */
 703                 kref_init(&info->refcount);
 704                 info->is_active = 1;
 705
 706                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
 707                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 708                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 709                          le32_to_cpu(p->Capability));
 710
 711                 spin_lock(&ses->iface_lock);
 712                 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
 713                         list_add_tail(&info->iface_head, &iface->iface_head);
 714                         kref_put(&iface->refcount, release_iface);
 715                 } else
 716                         list_add_tail(&info->iface_head, &ses->iface_list);
 717
 718                 ses->iface_count++;
 719                 spin_unlock(&ses->iface_lock);
 720                 ses->iface_last_update = jiffies;
 721 next_iface:
 722                 nb_iface++;
 723                 next = le32_to_cpu(p->Next);
 724                 if (!next) {
 725                         bytes_left -= sizeof(*p);
 726                         break;
 727                 }
 728                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 729                 bytes_left -= next;
 730         }
 731
 732         if (!nb_iface) {
 733                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 734                 rc = -EINVAL;
 735                 goto out;
 736         }
 737
 738         /* Azure rounds the buffer size up 8, to a 16 byte boundary */
 739         if ((bytes_left > 8) || p->Next)
 740                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 741
 742
 743         if (!ses->iface_count) {
 744                 rc = -EINVAL;
 745                 goto out;
 746         }
 747
 748 out:
 749         return rc;
 750 }
 751
 752 int
 753 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
 754 {
 755         int rc;
 756         unsigned int ret_data_len = 0;
 757         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 758         struct cifs_ses *ses = tcon->ses;
 759         struct TCP_Server_Info *pserver;
 760
 761         /* do not query too frequently */
 762         if (ses->iface_last_update &&
 763             time_before(jiffies, ses->iface_last_update +
 764                         (SMB_INTERFACE_POLL_INTERVAL * HZ)))
 765                 return 0;
 766
 767         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 768                         FSCTL_QUERY_NETWORK_INTERFACE_INFO,
 769                         NULL /* no data input */, 0 /* no data input */,
 770                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 771         if (rc == -EOPNOTSUPP) {
 772                 cifs_dbg(FYI,
 773                          "server does not support query network interfaces\n");
 774                 ret_data_len = 0;
 775         } else if (rc != 0) {
 776                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 777                 goto out;
 778         }
 779
 780         rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
 781         if (rc)
 782                 goto out;
 783
 784         /* check if iface is still active */
 785         pserver = ses->chans[0].server;
 786         if (pserver && !cifs_chan_is_iface_active(ses, pserver))
 787                 cifs_chan_update_iface(ses, pserver);
 788
 789 out:
 790         kfree(out_buf);
 791         return rc;
 792 }
 793
 794 static void
 795 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 796               struct cifs_sb_info *cifs_sb)
 797 {
 798         int rc;
 799         __le16 srch_path = 0; /* Null - open root of share */
 800         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 801         struct cifs_open_parms oparms;
 802         struct cifs_fid fid;
 803         struct cached_fid *cfid = NULL;
 804
 805         oparms = (struct cifs_open_parms) {
 806                 .tcon = tcon,
 807                 .path = "",
 808                 .desired_access = FILE_READ_ATTRIBUTES,
 809                 .disposition = FILE_OPEN,
 810                 .create_options = cifs_create_options(cifs_sb, 0),
 811                 .fid = &fid,
 812         };
 813
 814         rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
 815         if (rc == 0)
 816                 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
 817         else
 818                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 819                                NULL, NULL);
 820         if (rc)
 821                 return;
 822
 823         SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
 824
 825         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 826                         FS_ATTRIBUTE_INFORMATION);
 827         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 828                         FS_DEVICE_INFORMATION);
 829         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 830                         FS_VOLUME_INFORMATION);
 831         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 832                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 833         if (cfid == NULL)
 834                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 835         else
 836                 close_cached_dir(cfid);
 837 }
 838
 839 static void
 840 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 841               struct cifs_sb_info *cifs_sb)
 842 {
 843         int rc;
 844         __le16 srch_path = 0; /* Null - open root of share */
 845         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 846         struct cifs_open_parms oparms;
 847         struct cifs_fid fid;
 848
 849         oparms = (struct cifs_open_parms) {
 850                 .tcon = tcon,
 851                 .path = "",
 852                 .desired_access = FILE_READ_ATTRIBUTES,
 853                 .disposition = FILE_OPEN,
 854                 .create_options = cifs_create_options(cifs_sb, 0),
 855                 .fid = &fid,
 856         };
 857
 858         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 859                        NULL, NULL);
 860         if (rc)
 861                 return;
 862
 863         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 864                         FS_ATTRIBUTE_INFORMATION);
 865         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 866                         FS_DEVICE_INFORMATION);
 867         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 868 }
 869
 870 static int
 871 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 872                         struct cifs_sb_info *cifs_sb, const char *full_path)
 873 {
 874         __le16 *utf16_path;
 875         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 876         int err_buftype = CIFS_NO_BUFFER;
 877         struct cifs_open_parms oparms;
 878         struct kvec err_iov = {};
 879         struct cifs_fid fid;
 880         struct cached_fid *cfid;
 881         bool islink;
 882         int rc, rc2;
 883
 884         rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
 885         if (!rc) {
 886                 if (cfid->has_lease) {
 887                         close_cached_dir(cfid);
 888                         return 0;
 889                 }
 890                 close_cached_dir(cfid);
 891         }
 892
 893         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 894         if (!utf16_path)
 895                 return -ENOMEM;
 896
 897         oparms = (struct cifs_open_parms) {
 898                 .tcon = tcon,
 899                 .path = full_path,
 900                 .desired_access = FILE_READ_ATTRIBUTES,
 901                 .disposition = FILE_OPEN,
 902                 .create_options = cifs_create_options(cifs_sb, 0),
 903                 .fid = &fid,
 904         };
 905
 906         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 907                        &err_iov, &err_buftype);
 908         if (rc) {
 909                 struct smb2_hdr *hdr = err_iov.iov_base;
 910
 911                 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
 912                         goto out;
 913
 914                 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
 915                         rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
 916                                                              full_path, &islink);
 917                         if (rc2) {
 918                                 rc = rc2;
 919                                 goto out;
 920                         }
 921                         if (islink)
 922                                 rc = -EREMOTE;
 923                 }
 924                 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
 925                     (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 926                         rc = -EOPNOTSUPP;
 927                 goto out;
 928         }
 929
 930         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 931
 932 out:
 933         free_rsp_buf(err_buftype, err_iov.iov_base);
 934         kfree(utf16_path);
 935         return rc;
 936 }
 937
 938 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 939                              struct cifs_sb_info *cifs_sb, const char *full_path,
 940                              u64 *uniqueid, struct cifs_open_info_data *data)
 941 {
 942         *uniqueid = le64_to_cpu(data->fi.IndexNumber);
 943         return 0;
 944 }
 945
 946 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 947                                 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
 948 {
 949         struct cifs_fid *fid = &cfile->fid;
 950
 951         if (cfile->symlink_target) {
 952                 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
 953                 if (!data->symlink_target)
 954                         return -ENOMEM;
 955         }
 956         return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
 957 }
 958
 959 #ifdef CONFIG_CIFS_XATTR
 960 static ssize_t
 961 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 962                      struct smb2_file_full_ea_info *src, size_t src_size,
 963                      const unsigned char *ea_name)
 964 {
 965         int rc = 0;
 966         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 967         char *name, *value;
 968         size_t buf_size = dst_size;
 969         size_t name_len, value_len, user_name_len;
 970
 971         while (src_size > 0) {
 972                 name_len = (size_t)src->ea_name_length;
 973                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 974
 975                 if (name_len == 0)
 976                         break;
 977
 978                 if (src_size < 8 + name_len + 1 + value_len) {
 979                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 980                         rc = -EIO;
 981                         goto out;
 982                 }
 983
 984                 name = &src->ea_data[0];
 985                 value = &src->ea_data[src->ea_name_length + 1];
 986
 987                 if (ea_name) {
 988                         if (ea_name_len == name_len &&
 989                             memcmp(ea_name, name, name_len) == 0) {
 990                                 rc = value_len;
 991                                 if (dst_size == 0)
 992                                         goto out;
 993                                 if (dst_size < value_len) {
 994                                         rc = -ERANGE;
 995                                         goto out;
 996                                 }
 997                                 memcpy(dst, value, value_len);
 998                                 goto out;
 999                         }
1000                 } else {
1001                         /* 'user.' plus a terminating null */
1002                         user_name_len = 5 + 1 + name_len;
1003
1004                         if (buf_size == 0) {
1005                                 /* skip copy - calc size only */
1006                                 rc += user_name_len;
1007                         } else if (dst_size >= user_name_len) {
1008                                 dst_size -= user_name_len;
1009                                 memcpy(dst, "user.", 5);
1010                                 dst += 5;
1011                                 memcpy(dst, src->ea_data, name_len);
1012                                 dst += name_len;
1013                                 *dst = 0;
1014                                 ++dst;
1015                                 rc += user_name_len;
1016                         } else {
1017                                 /* stop before overrun buffer */
1018                                 rc = -ERANGE;
1019                                 break;
1020                         }
1021                 }
1022
1023                 if (!src->next_entry_offset)
1024                         break;
1025
1026                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1027                         /* stop before overrun buffer */
1028                         rc = -ERANGE;
1029                         break;
1030                 }
1031                 src_size -= le32_to_cpu(src->next_entry_offset);
1032                 src = (void *)((char *)src +
1033                                le32_to_cpu(src->next_entry_offset));
1034         }
1035
1036         /* didn't find the named attribute */
1037         if (ea_name)
1038                 rc = -ENODATA;
1039
1040 out:
1041         return (ssize_t)rc;
1042 }
1043
1044 static ssize_t
1045 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1046                const unsigned char *path, const unsigned char *ea_name,
1047                char *ea_data, size_t buf_size,
1048                struct cifs_sb_info *cifs_sb)
1049 {
1050         int rc;
1051         struct kvec rsp_iov = {NULL, 0};
1052         int buftype = CIFS_NO_BUFFER;
1053         struct smb2_query_info_rsp *rsp;
1054         struct smb2_file_full_ea_info *info = NULL;
1055
1056         rc = smb2_query_info_compound(xid, tcon, path,
1057                                       FILE_READ_EA,
1058                                       FILE_FULL_EA_INFORMATION,
1059                                       SMB2_O_INFO_FILE,
1060                                       CIFSMaxBufSize -
1061                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1062                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1063                                       &rsp_iov, &buftype, cifs_sb);
1064         if (rc) {
1065                 /*
1066                  * If ea_name is NULL (listxattr) and there are no EAs,
1067                  * return 0 as it's not an error. Otherwise, the specified
1068                  * ea_name was not found.
1069                  */
1070                 if (!ea_name && rc == -ENODATA)
1071                         rc = 0;
1072                 goto qeas_exit;
1073         }
1074
1075         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1076         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1077                                le32_to_cpu(rsp->OutputBufferLength),
1078                                &rsp_iov,
1079                                sizeof(struct smb2_file_full_ea_info));
1080         if (rc)
1081                 goto qeas_exit;
1082
1083         info = (struct smb2_file_full_ea_info *)(
1084                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1085         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1086                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1087
1088  qeas_exit:
1089         free_rsp_buf(buftype, rsp_iov.iov_base);
1090         return rc;
1091 }
1092
1093 static int
1094 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1095             const char *path, const char *ea_name, const void *ea_value,
1096             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1097             struct cifs_sb_info *cifs_sb)
1098 {
1099         struct smb2_compound_vars *vars;
1100         struct cifs_ses *ses = tcon->ses;
1101         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1102         struct smb_rqst *rqst;
1103         struct kvec *rsp_iov;
1104         __le16 *utf16_path = NULL;
1105         int ea_name_len = strlen(ea_name);
1106         int flags = CIFS_CP_CREATE_CLOSE_OP;
1107         int len;
1108         int resp_buftype[3];
1109         struct cifs_open_parms oparms;
1110         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1111         struct cifs_fid fid;
1112         unsigned int size[1];
1113         void *data[1];
1114         struct smb2_file_full_ea_info *ea = NULL;
1115         struct smb2_query_info_rsp *rsp;
1116         int rc, used_len = 0;
1117
1118         if (smb3_encryption_required(tcon))
1119                 flags |= CIFS_TRANSFORM_REQ;
1120
1121         if (ea_name_len > 255)
1122                 return -EINVAL;
1123
1124         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1125         if (!utf16_path)
1126                 return -ENOMEM;
1127
1128         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1129         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1130         if (!vars) {
1131                 rc = -ENOMEM;
1132                 goto out_free_path;
1133         }
1134         rqst = vars->rqst;
1135         rsp_iov = vars->rsp_iov;
1136
1137         if (ses->server->ops->query_all_EAs) {
1138                 if (!ea_value) {
1139                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1140                                                              ea_name, NULL, 0,
1141                                                              cifs_sb);
1142                         if (rc == -ENODATA)
1143                                 goto sea_exit;
1144                 } else {
1145                         /* If we are adding a attribute we should first check
1146                          * if there will be enough space available to store
1147                          * the new EA. If not we should not add it since we
1148                          * would not be able to even read the EAs back.
1149                          */
1150                         rc = smb2_query_info_compound(xid, tcon, path,
1151                                       FILE_READ_EA,
1152                                       FILE_FULL_EA_INFORMATION,
1153                                       SMB2_O_INFO_FILE,
1154                                       CIFSMaxBufSize -
1155                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1156                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1157                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1158                         if (rc == 0) {
1159                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1160                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1161                         }
1162                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1163                         resp_buftype[1] = CIFS_NO_BUFFER;
1164                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1165                         rc = 0;
1166
1167                         /* Use a fudge factor of 256 bytes in case we collide
1168                          * with a different set_EAs command.
1169                          */
1170                         if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1171                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1172                            used_len + ea_name_len + ea_value_len + 1) {
1173                                 rc = -ENOSPC;
1174                                 goto sea_exit;
1175                         }
1176                 }
1177         }
1178
1179         /* Open */
1180         rqst[0].rq_iov = vars->open_iov;
1181         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183         oparms = (struct cifs_open_parms) {
1184                 .tcon = tcon,
1185                 .path = path,
1186                 .desired_access = FILE_WRITE_EA,
1187                 .disposition = FILE_OPEN,
1188                 .create_options = cifs_create_options(cifs_sb, 0),
1189                 .fid = &fid,
1190         };
1191
1192         rc = SMB2_open_init(tcon, server,
1193                             &rqst[0], &oplock, &oparms, utf16_path);
1194         if (rc)
1195                 goto sea_exit;
1196         smb2_set_next_command(tcon, &rqst[0]);
1197
1198
1199         /* Set Info */
1200         rqst[1].rq_iov = vars->si_iov;
1201         rqst[1].rq_nvec = 1;
1202
1203         len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1204         ea = kzalloc(len, GFP_KERNEL);
1205         if (ea == NULL) {
1206                 rc = -ENOMEM;
1207                 goto sea_exit;
1208         }
1209
1210         ea->ea_name_length = ea_name_len;
1211         ea->ea_value_length = cpu_to_le16(ea_value_len);
1212         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1213         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1214
1215         size[0] = len;
1216         data[0] = ea;
1217
1218         rc = SMB2_set_info_init(tcon, server,
1219                                 &rqst[1], COMPOUND_FID,
1220                                 COMPOUND_FID, current->tgid,
1221                                 FILE_FULL_EA_INFORMATION,
1222                                 SMB2_O_INFO_FILE, 0, data, size);
1223         if (rc)
1224                 goto sea_exit;
1225         smb2_set_next_command(tcon, &rqst[1]);
1226         smb2_set_related(&rqst[1]);
1227
1228         /* Close */
1229         rqst[2].rq_iov = &vars->close_iov;
1230         rqst[2].rq_nvec = 1;
1231         rc = SMB2_close_init(tcon, server,
1232                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1233         if (rc)
1234                 goto sea_exit;
1235         smb2_set_related(&rqst[2]);
1236
1237         rc = compound_send_recv(xid, ses, server,
1238                                 flags, 3, rqst,
1239                                 resp_buftype, rsp_iov);
1240         /* no need to bump num_remote_opens because handle immediately closed */
1241
1242  sea_exit:
1243         kfree(ea);
1244         SMB2_open_free(&rqst[0]);
1245         SMB2_set_info_free(&rqst[1]);
1246         SMB2_close_free(&rqst[2]);
1247         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1248         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1249         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1250         kfree(vars);
1251 out_free_path:
1252         kfree(utf16_path);
1253         return rc;
1254 }
1255 #endif
1256
1257 static bool
1258 smb2_can_echo(struct TCP_Server_Info *server)
1259 {
1260         return server->echoes;
1261 }
1262
1263 static void
1264 smb2_clear_stats(struct cifs_tcon *tcon)
1265 {
1266         int i;
1267
1268         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1269                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1270                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1271         }
1272 }
1273
1274 static void
1275 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1276 {
1277         seq_puts(m, "\n\tShare Capabilities:");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1279                 seq_puts(m, " DFS,");
1280         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1281                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1282         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1283                 seq_puts(m, " SCALEOUT,");
1284         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1285                 seq_puts(m, " CLUSTER,");
1286         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1287                 seq_puts(m, " ASYMMETRIC,");
1288         if (tcon->capabilities == 0)
1289                 seq_puts(m, " None");
1290         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1291                 seq_puts(m, " Aligned,");
1292         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1293                 seq_puts(m, " Partition Aligned,");
1294         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1295                 seq_puts(m, " SSD,");
1296         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1297                 seq_puts(m, " TRIM-support,");
1298
1299         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1300         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1301         if (tcon->perf_sector_size)
1302                 seq_printf(m, "\tOptimal sector size: 0x%x",
1303                            tcon->perf_sector_size);
1304         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1305 }
1306
1307 static void
1308 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1309 {
1310         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1311         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1312
1313         /*
1314          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1315          *  totals (requests sent) since those SMBs are per-session not per tcon
1316          */
1317         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1318                    (long long)(tcon->bytes_read),
1319                    (long long)(tcon->bytes_written));
1320         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1321                    atomic_read(&tcon->num_local_opens),
1322                    atomic_read(&tcon->num_remote_opens));
1323         seq_printf(m, "\nTreeConnects: %d total %d failed",
1324                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1325                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1326         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1327                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1328                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1329         seq_printf(m, "\nCreates: %d total %d failed",
1330                    atomic_read(&sent[SMB2_CREATE_HE]),
1331                    atomic_read(&failed[SMB2_CREATE_HE]));
1332         seq_printf(m, "\nCloses: %d total %d failed",
1333                    atomic_read(&sent[SMB2_CLOSE_HE]),
1334                    atomic_read(&failed[SMB2_CLOSE_HE]));
1335         seq_printf(m, "\nFlushes: %d total %d failed",
1336                    atomic_read(&sent[SMB2_FLUSH_HE]),
1337                    atomic_read(&failed[SMB2_FLUSH_HE]));
1338         seq_printf(m, "\nReads: %d total %d failed",
1339                    atomic_read(&sent[SMB2_READ_HE]),
1340                    atomic_read(&failed[SMB2_READ_HE]));
1341         seq_printf(m, "\nWrites: %d total %d failed",
1342                    atomic_read(&sent[SMB2_WRITE_HE]),
1343                    atomic_read(&failed[SMB2_WRITE_HE]));
1344         seq_printf(m, "\nLocks: %d total %d failed",
1345                    atomic_read(&sent[SMB2_LOCK_HE]),
1346                    atomic_read(&failed[SMB2_LOCK_HE]));
1347         seq_printf(m, "\nIOCTLs: %d total %d failed",
1348                    atomic_read(&sent[SMB2_IOCTL_HE]),
1349                    atomic_read(&failed[SMB2_IOCTL_HE]));
1350         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1351                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1352                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1353         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1354                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1355                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1356         seq_printf(m, "\nQueryInfos: %d total %d failed",
1357                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1358                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1359         seq_printf(m, "\nSetInfos: %d total %d failed",
1360                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1361                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1362         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1363                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1364                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1365 }
1366
1367 static void
1368 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1369 {
1370         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1371         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1372
1373         cfile->fid.persistent_fid = fid->persistent_fid;
1374         cfile->fid.volatile_fid = fid->volatile_fid;
1375         cfile->fid.access = fid->access;
1376 #ifdef CONFIG_CIFS_DEBUG2
1377         cfile->fid.mid = fid->mid;
1378 #endif /* CIFS_DEBUG2 */
1379         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1380                                       &fid->purge_cache);
1381         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1382         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1383 }
1384
1385 static void
1386 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1387                 struct cifs_fid *fid)
1388 {
1389         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1390 }
1391
1392 static void
1393 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1394                    struct cifsFileInfo *cfile)
1395 {
1396         struct smb2_file_network_open_info file_inf;
1397         struct inode *inode;
1398         int rc;
1399
1400         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1401                    cfile->fid.volatile_fid, &file_inf);
1402         if (rc)
1403                 return;
1404
1405         inode = d_inode(cfile->dentry);
1406
1407         spin_lock(&inode->i_lock);
1408         CIFS_I(inode)->time = jiffies;
1409
1410         /* Creation time should not need to be updated on close */
1411         if (file_inf.LastWriteTime)
1412                 inode_set_mtime_to_ts(inode,
1413                                       cifs_NTtimeToUnix(file_inf.LastWriteTime));
1414         if (file_inf.ChangeTime)
1415                 inode_set_ctime_to_ts(inode,
1416                                       cifs_NTtimeToUnix(file_inf.ChangeTime));
1417         if (file_inf.LastAccessTime)
1418                 inode_set_atime_to_ts(inode,
1419                                       cifs_NTtimeToUnix(file_inf.LastAccessTime));
1420
1421         /*
1422          * i_blocks is not related to (i_size / i_blksize),
1423          * but instead 512 byte (2**9) size is required for
1424          * calculating num blocks.
1425          */
1426         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1427                 inode->i_blocks =
1428                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1429
1430         /* End of file and Attributes should not have to be updated on close */
1431         spin_unlock(&inode->i_lock);
1432 }
1433
1434 static int
1435 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1436                      u64 persistent_fid, u64 volatile_fid,
1437                      struct copychunk_ioctl *pcchunk)
1438 {
1439         int rc;
1440         unsigned int ret_data_len;
1441         struct resume_key_req *res_key;
1442
1443         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1444                         FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1445                         CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1446
1447         if (rc == -EOPNOTSUPP) {
1448                 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1449                 goto req_res_key_exit;
1450         } else if (rc) {
1451                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1452                 goto req_res_key_exit;
1453         }
1454         if (ret_data_len < sizeof(struct resume_key_req)) {
1455                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1456                 rc = -EINVAL;
1457                 goto req_res_key_exit;
1458         }
1459         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1460
1461 req_res_key_exit:
1462         kfree(res_key);
1463         return rc;
1464 }
1465
1466 static int
1467 smb2_ioctl_query_info(const unsigned int xid,
1468                       struct cifs_tcon *tcon,
1469                       struct cifs_sb_info *cifs_sb,
1470                       __le16 *path, int is_dir,
1471                       unsigned long p)
1472 {
1473         struct smb2_compound_vars *vars;
1474         struct smb_rqst *rqst;
1475         struct kvec *rsp_iov;
1476         struct cifs_ses *ses = tcon->ses;
1477         struct TCP_Server_Info *server = cifs_pick_channel(ses);
1478         char __user *arg = (char __user *)p;
1479         struct smb_query_info qi;
1480         struct smb_query_info __user *pqi;
1481         int rc = 0;
1482         int flags = CIFS_CP_CREATE_CLOSE_OP;
1483         struct smb2_query_info_rsp *qi_rsp = NULL;
1484         struct smb2_ioctl_rsp *io_rsp = NULL;
1485         void *buffer = NULL;
1486         int resp_buftype[3];
1487         struct cifs_open_parms oparms;
1488         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1489         struct cifs_fid fid;
1490         unsigned int size[2];
1491         void *data[2];
1492         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1493         void (*free_req1_func)(struct smb_rqst *r);
1494
1495         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1496         if (vars == NULL)
1497                 return -ENOMEM;
1498         rqst = &vars->rqst[0];
1499         rsp_iov = &vars->rsp_iov[0];
1500
1501         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1502
1503         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1504                 rc = -EFAULT;
1505                 goto free_vars;
1506         }
1507         if (qi.output_buffer_length > 1024) {
1508                 rc = -EINVAL;
1509                 goto free_vars;
1510         }
1511
1512         if (!ses || !server) {
1513                 rc = -EIO;
1514                 goto free_vars;
1515         }
1516
1517         if (smb3_encryption_required(tcon))
1518                 flags |= CIFS_TRANSFORM_REQ;
1519
1520         if (qi.output_buffer_length) {
1521                 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1522                 if (IS_ERR(buffer)) {
1523                         rc = PTR_ERR(buffer);
1524                         goto free_vars;
1525                 }
1526         }
1527
1528         /* Open */
1529         rqst[0].rq_iov = &vars->open_iov[0];
1530         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1531
1532         oparms = (struct cifs_open_parms) {
1533                 .tcon = tcon,
1534                 .disposition = FILE_OPEN,
1535                 .create_options = cifs_create_options(cifs_sb, create_options),
1536                 .fid = &fid,
1537         };
1538
1539         if (qi.flags & PASSTHRU_FSCTL) {
1540                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1541                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1542                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1543                         break;
1544                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1545                         oparms.desired_access = GENERIC_ALL;
1546                         break;
1547                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1548                         oparms.desired_access = GENERIC_READ;
1549                         break;
1550                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1551                         oparms.desired_access = GENERIC_WRITE;
1552                         break;
1553                 }
1554         } else if (qi.flags & PASSTHRU_SET_INFO) {
1555                 oparms.desired_access = GENERIC_WRITE;
1556         } else {
1557                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1558         }
1559
1560         rc = SMB2_open_init(tcon, server,
1561                             &rqst[0], &oplock, &oparms, path);
1562         if (rc)
1563                 goto free_output_buffer;
1564         smb2_set_next_command(tcon, &rqst[0]);
1565
1566         /* Query */
1567         if (qi.flags & PASSTHRU_FSCTL) {
1568                 /* Can eventually relax perm check since server enforces too */
1569                 if (!capable(CAP_SYS_ADMIN)) {
1570                         rc = -EPERM;
1571                         goto free_open_req;
1572                 }
1573                 rqst[1].rq_iov = &vars->io_iov[0];
1574                 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1575
1576                 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1577                                      qi.info_type, buffer, qi.output_buffer_length,
1578                                      CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1579                                      MAX_SMB2_CLOSE_RESPONSE_SIZE);
1580                 free_req1_func = SMB2_ioctl_free;
1581         } else if (qi.flags == PASSTHRU_SET_INFO) {
1582                 /* Can eventually relax perm check since server enforces too */
1583                 if (!capable(CAP_SYS_ADMIN)) {
1584                         rc = -EPERM;
1585                         goto free_open_req;
1586                 }
1587                 if (qi.output_buffer_length < 8) {
1588                         rc = -EINVAL;
1589                         goto free_open_req;
1590                 }
1591                 rqst[1].rq_iov = vars->si_iov;
1592                 rqst[1].rq_nvec = 1;
1593
1594                 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1595                 size[0] = 8;
1596                 data[0] = buffer;
1597
1598                 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1599                                         current->tgid, FILE_END_OF_FILE_INFORMATION,
1600                                         SMB2_O_INFO_FILE, 0, data, size);
1601                 free_req1_func = SMB2_set_info_free;
1602         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1603                 rqst[1].rq_iov = &vars->qi_iov;
1604                 rqst[1].rq_nvec = 1;
1605
1606                 rc = SMB2_query_info_init(tcon, server,
1607                                   &rqst[1], COMPOUND_FID,
1608                                   COMPOUND_FID, qi.file_info_class,
1609                                   qi.info_type, qi.additional_information,
1610                                   qi.input_buffer_length,
1611                                   qi.output_buffer_length, buffer);
1612                 free_req1_func = SMB2_query_info_free;
1613         } else { /* unknown flags */
1614                 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1615                               qi.flags);
1616                 rc = -EINVAL;
1617         }
1618
1619         if (rc)
1620                 goto free_open_req;
1621         smb2_set_next_command(tcon, &rqst[1]);
1622         smb2_set_related(&rqst[1]);
1623
1624         /* Close */
1625         rqst[2].rq_iov = &vars->close_iov;
1626         rqst[2].rq_nvec = 1;
1627
1628         rc = SMB2_close_init(tcon, server,
1629                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1630         if (rc)
1631                 goto free_req_1;
1632         smb2_set_related(&rqst[2]);
1633
1634         rc = compound_send_recv(xid, ses, server,
1635                                 flags, 3, rqst,
1636                                 resp_buftype, rsp_iov);
1637         if (rc)
1638                 goto out;
1639
1640         /* No need to bump num_remote_opens since handle immediately closed */
1641         if (qi.flags & PASSTHRU_FSCTL) {
1642                 pqi = (struct smb_query_info __user *)arg;
1643                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1644                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1645                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1646                 if (qi.input_buffer_length > 0 &&
1647                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1648                     > rsp_iov[1].iov_len) {
1649                         rc = -EFAULT;
1650                         goto out;
1651                 }
1652
1653                 if (copy_to_user(&pqi->input_buffer_length,
1654                                  &qi.input_buffer_length,
1655                                  sizeof(qi.input_buffer_length))) {
1656                         rc = -EFAULT;
1657                         goto out;
1658                 }
1659
1660                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1661                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1662                                  qi.input_buffer_length))
1663                         rc = -EFAULT;
1664         } else {
1665                 pqi = (struct smb_query_info __user *)arg;
1666                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1667                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1668                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1669                 if (copy_to_user(&pqi->input_buffer_length,
1670                                  &qi.input_buffer_length,
1671                                  sizeof(qi.input_buffer_length))) {
1672                         rc = -EFAULT;
1673                         goto out;
1674                 }
1675
1676                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1677                                  qi.input_buffer_length))
1678                         rc = -EFAULT;
1679         }
1680
1681 out:
1682         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1683         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1684         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1685         SMB2_close_free(&rqst[2]);
1686 free_req_1:
1687         free_req1_func(&rqst[1]);
1688 free_open_req:
1689         SMB2_open_free(&rqst[0]);
1690 free_output_buffer:
1691         kfree(buffer);
1692 free_vars:
1693         kfree(vars);
1694         return rc;
1695 }
1696
1697 static ssize_t
1698 smb2_copychunk_range(const unsigned int xid,
1699                         struct cifsFileInfo *srcfile,
1700                         struct cifsFileInfo *trgtfile, u64 src_off,
1701                         u64 len, u64 dest_off)
1702 {
1703         int rc;
1704         unsigned int ret_data_len;
1705         struct copychunk_ioctl *pcchunk;
1706         struct copychunk_ioctl_rsp *retbuf = NULL;
1707         struct cifs_tcon *tcon;
1708         int chunks_copied = 0;
1709         bool chunk_sizes_updated = false;
1710         ssize_t bytes_written, total_bytes_written = 0;
1711
1712         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1713         if (pcchunk == NULL)
1714                 return -ENOMEM;
1715
1716         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1717         /* Request a key from the server to identify the source of the copy */
1718         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1719                                 srcfile->fid.persistent_fid,
1720                                 srcfile->fid.volatile_fid, pcchunk);
1721
1722         /* Note: request_res_key sets res_key null only if rc !=0 */
1723         if (rc)
1724                 goto cchunk_out;
1725
1726         /* For now array only one chunk long, will make more flexible later */
1727         pcchunk->ChunkCount = cpu_to_le32(1);
1728         pcchunk->Reserved = 0;
1729         pcchunk->Reserved2 = 0;
1730
1731         tcon = tlink_tcon(trgtfile->tlink);
1732
1733         while (len > 0) {
1734                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1735                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1736                 pcchunk->Length =
1737                         cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1738
1739                 /* Request server copy to target from src identified by key */
1740                 kfree(retbuf);
1741                 retbuf = NULL;
1742                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1743                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1744                         (char *)pcchunk, sizeof(struct copychunk_ioctl),
1745                         CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1746                 if (rc == 0) {
1747                         if (ret_data_len !=
1748                                         sizeof(struct copychunk_ioctl_rsp)) {
1749                                 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1750                                 rc = -EIO;
1751                                 goto cchunk_out;
1752                         }
1753                         if (retbuf->TotalBytesWritten == 0) {
1754                                 cifs_dbg(FYI, "no bytes copied\n");
1755                                 rc = -EIO;
1756                                 goto cchunk_out;
1757                         }
1758                         /*
1759                          * Check if server claimed to write more than we asked
1760                          */
1761                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1762                             le32_to_cpu(pcchunk->Length)) {
1763                                 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1764                                 rc = -EIO;
1765                                 goto cchunk_out;
1766                         }
1767                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1768                                 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1769                                 rc = -EIO;
1770                                 goto cchunk_out;
1771                         }
1772                         chunks_copied++;
1773
1774                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1775                         src_off += bytes_written;
1776                         dest_off += bytes_written;
1777                         len -= bytes_written;
1778                         total_bytes_written += bytes_written;
1779
1780                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1781                                 le32_to_cpu(retbuf->ChunksWritten),
1782                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1783                                 bytes_written);
1784                 } else if (rc == -EINVAL) {
1785                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1786                                 goto cchunk_out;
1787
1788                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1789                                 le32_to_cpu(retbuf->ChunksWritten),
1790                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1791                                 le32_to_cpu(retbuf->TotalBytesWritten));
1792
1793                         /*
1794                          * Check if this is the first request using these sizes,
1795                          * (ie check if copy succeed once with original sizes
1796                          * and check if the server gave us different sizes after
1797                          * we already updated max sizes on previous request).
1798                          * if not then why is the server returning an error now
1799                          */
1800                         if ((chunks_copied != 0) || chunk_sizes_updated)
1801                                 goto cchunk_out;
1802
1803                         /* Check that server is not asking us to grow size */
1804                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1805                                         tcon->max_bytes_chunk)
1806                                 tcon->max_bytes_chunk =
1807                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1808                         else
1809                                 goto cchunk_out; /* server gave us bogus size */
1810
1811                         /* No need to change MaxChunks since already set to 1 */
1812                         chunk_sizes_updated = true;
1813                 } else
1814                         goto cchunk_out;
1815         }
1816
1817 cchunk_out:
1818         kfree(pcchunk);
1819         kfree(retbuf);
1820         if (rc)
1821                 return rc;
1822         else
1823                 return total_bytes_written;
1824 }
1825
1826 static int
1827 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1828                 struct cifs_fid *fid)
1829 {
1830         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1831 }
1832
1833 static unsigned int
1834 smb2_read_data_offset(char *buf)
1835 {
1836         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1837
1838         return rsp->DataOffset;
1839 }
1840
1841 static unsigned int
1842 smb2_read_data_length(char *buf, bool in_remaining)
1843 {
1844         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1845
1846         if (in_remaining)
1847                 return le32_to_cpu(rsp->DataRemaining);
1848
1849         return le32_to_cpu(rsp->DataLength);
1850 }
1851
1852
1853 static int
1854 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1855                struct cifs_io_parms *parms, unsigned int *bytes_read,
1856                char **buf, int *buf_type)
1857 {
1858         parms->persistent_fid = pfid->persistent_fid;
1859         parms->volatile_fid = pfid->volatile_fid;
1860         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1861 }
1862
1863 static int
1864 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1865                 struct cifs_io_parms *parms, unsigned int *written,
1866                 struct kvec *iov, unsigned long nr_segs)
1867 {
1868
1869         parms->persistent_fid = pfid->persistent_fid;
1870         parms->volatile_fid = pfid->volatile_fid;
1871         return SMB2_write(xid, parms, written, iov, nr_segs);
1872 }
1873
1874 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1875 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1876                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1877 {
1878         struct cifsInodeInfo *cifsi;
1879         int rc;
1880
1881         cifsi = CIFS_I(inode);
1882
1883         /* if file already sparse don't bother setting sparse again */
1884         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1885                 return true; /* already sparse */
1886
1887         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1888                 return true; /* already not sparse */
1889
1890         /*
1891          * Can't check for sparse support on share the usual way via the
1892          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1893          * since Samba server doesn't set the flag on the share, yet
1894          * supports the set sparse FSCTL and returns sparse correctly
1895          * in the file attributes. If we fail setting sparse though we
1896          * mark that server does not support sparse files for this share
1897          * to avoid repeatedly sending the unsupported fsctl to server
1898          * if the file is repeatedly extended.
1899          */
1900         if (tcon->broken_sparse_sup)
1901                 return false;
1902
1903         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1904                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1905                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1906         if (rc) {
1907                 tcon->broken_sparse_sup = true;
1908                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1909                 return false;
1910         }
1911
1912         if (setsparse)
1913                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1914         else
1915                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1916
1917         return true;
1918 }
1919
1920 static int
1921 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1922                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1923 {
1924         __le64 eof = cpu_to_le64(size);
1925         struct inode *inode;
1926
1927         /*
1928          * If extending file more than one page make sparse. Many Linux fs
1929          * make files sparse by default when extending via ftruncate
1930          */
1931         inode = d_inode(cfile->dentry);
1932
1933         if (!set_alloc && (size > inode->i_size + 8192)) {
1934                 __u8 set_sparse = 1;
1935
1936                 /* whether set sparse succeeds or not, extend the file */
1937                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1938         }
1939
1940         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1941                             cfile->fid.volatile_fid, cfile->pid, &eof);
1942 }
1943
1944 static int
1945 smb2_duplicate_extents(const unsigned int xid,
1946                         struct cifsFileInfo *srcfile,
1947                         struct cifsFileInfo *trgtfile, u64 src_off,
1948                         u64 len, u64 dest_off)
1949 {
1950         int rc;
1951         unsigned int ret_data_len;
1952         struct inode *inode;
1953         struct duplicate_extents_to_file dup_ext_buf;
1954         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1955
1956         /* server fileays advertise duplicate extent support with this flag */
1957         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1958              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1959                 return -EOPNOTSUPP;
1960
1961         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1962         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1963         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1964         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1965         dup_ext_buf.ByteCount = cpu_to_le64(len);
1966         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1967                 src_off, dest_off, len);
1968
1969         inode = d_inode(trgtfile->dentry);
1970         if (inode->i_size < dest_off + len) {
1971                 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1972                 if (rc)
1973                         goto duplicate_extents_out;
1974
1975                 /*
1976                  * Although also could set plausible allocation size (i_blocks)
1977                  * here in addition to setting the file size, in reflink
1978                  * it is likely that the target file is sparse. Its allocation
1979                  * size will be queried on next revalidate, but it is important
1980                  * to make sure that file's cached size is updated immediately
1981                  */
1982                 cifs_setsize(inode, dest_off + len);
1983         }
1984         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1985                         trgtfile->fid.volatile_fid,
1986                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1987                         (char *)&dup_ext_buf,
1988                         sizeof(struct duplicate_extents_to_file),
1989                         CIFSMaxBufSize, NULL,
1990                         &ret_data_len);
1991
1992         if (ret_data_len > 0)
1993                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1994
1995 duplicate_extents_out:
1996         return rc;
1997 }
1998
1999 static int
2000 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2001                    struct cifsFileInfo *cfile)
2002 {
2003         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2004                             cfile->fid.volatile_fid);
2005 }
2006
2007 static int
2008 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2009                    struct cifsFileInfo *cfile)
2010 {
2011         struct fsctl_set_integrity_information_req integr_info;
2012         unsigned int ret_data_len;
2013
2014         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2015         integr_info.Flags = 0;
2016         integr_info.Reserved = 0;
2017
2018         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2019                         cfile->fid.volatile_fid,
2020                         FSCTL_SET_INTEGRITY_INFORMATION,
2021                         (char *)&integr_info,
2022                         sizeof(struct fsctl_set_integrity_information_req),
2023                         CIFSMaxBufSize, NULL,
2024                         &ret_data_len);
2025
2026 }
2027
2028 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2029 #define GMT_TOKEN_SIZE 50
2030
2031 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2032
2033 /*
2034  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2035  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2036  */
2037 static int
2038 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2039                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2040 {
2041         char *retbuf = NULL;
2042         unsigned int ret_data_len = 0;
2043         int rc;
2044         u32 max_response_size;
2045         struct smb_snapshot_array snapshot_in;
2046
2047         /*
2048          * On the first query to enumerate the list of snapshots available
2049          * for this volume the buffer begins with 0 (number of snapshots
2050          * which can be returned is zero since at that point we do not know
2051          * how big the buffer needs to be). On the second query,
2052          * it (ret_data_len) is set to number of snapshots so we can
2053          * know to set the maximum response size larger (see below).
2054          */
2055         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2056                 return -EFAULT;
2057
2058         /*
2059          * Note that for snapshot queries that servers like Azure expect that
2060          * the first query be minimal size (and just used to get the number/size
2061          * of previous versions) so response size must be specified as EXACTLY
2062          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2063          * of eight bytes.
2064          */
2065         if (ret_data_len == 0)
2066                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2067         else
2068                 max_response_size = CIFSMaxBufSize;
2069
2070         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2071                         cfile->fid.volatile_fid,
2072                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2073                         NULL, 0 /* no input data */, max_response_size,
2074                         (char **)&retbuf,
2075                         &ret_data_len);
2076         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2077                         rc, ret_data_len);
2078         if (rc)
2079                 return rc;
2080
2081         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2082                 /* Fixup buffer */
2083                 if (copy_from_user(&snapshot_in, ioc_buf,
2084                     sizeof(struct smb_snapshot_array))) {
2085                         rc = -EFAULT;
2086                         kfree(retbuf);
2087                         return rc;
2088                 }
2089
2090                 /*
2091                  * Check for min size, ie not large enough to fit even one GMT
2092                  * token (snapshot).  On the first ioctl some users may pass in
2093                  * smaller size (or zero) to simply get the size of the array
2094                  * so the user space caller can allocate sufficient memory
2095                  * and retry the ioctl again with larger array size sufficient
2096                  * to hold all of the snapshot GMT tokens on the second try.
2097                  */
2098                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2099                         ret_data_len = sizeof(struct smb_snapshot_array);
2100
2101                 /*
2102                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2103                  * the snapshot array (of 50 byte GMT tokens) each
2104                  * representing an available previous version of the data
2105                  */
2106                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2107                                         sizeof(struct smb_snapshot_array)))
2108                         ret_data_len = snapshot_in.snapshot_array_size +
2109                                         sizeof(struct smb_snapshot_array);
2110
2111                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2112                         rc = -EFAULT;
2113         }
2114
2115         kfree(retbuf);
2116         return rc;
2117 }
2118
2119
2120
2121 static int
2122 smb3_notify(const unsigned int xid, struct file *pfile,
2123             void __user *ioc_buf, bool return_changes)
2124 {
2125         struct smb3_notify_info notify;
2126         struct smb3_notify_info __user *pnotify_buf;
2127         struct dentry *dentry = pfile->f_path.dentry;
2128         struct inode *inode = file_inode(pfile);
2129         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2130         struct cifs_open_parms oparms;
2131         struct cifs_fid fid;
2132         struct cifs_tcon *tcon;
2133         const unsigned char *path;
2134         char *returned_ioctl_info = NULL;
2135         void *page = alloc_dentry_path();
2136         __le16 *utf16_path = NULL;
2137         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2138         int rc = 0;
2139         __u32 ret_len = 0;
2140
2141         path = build_path_from_dentry(dentry, page);
2142         if (IS_ERR(path)) {
2143                 rc = PTR_ERR(path);
2144                 goto notify_exit;
2145         }
2146
2147         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2148         if (utf16_path == NULL) {
2149                 rc = -ENOMEM;
2150                 goto notify_exit;
2151         }
2152
2153         if (return_changes) {
2154                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2155                         rc = -EFAULT;
2156                         goto notify_exit;
2157                 }
2158         } else {
2159                 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2160                         rc = -EFAULT;
2161                         goto notify_exit;
2162                 }
2163                 notify.data_len = 0;
2164         }
2165
2166         tcon = cifs_sb_master_tcon(cifs_sb);
2167         oparms = (struct cifs_open_parms) {
2168                 .tcon = tcon,
2169                 .path = path,
2170                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2171                 .disposition = FILE_OPEN,
2172                 .create_options = cifs_create_options(cifs_sb, 0),
2173                 .fid = &fid,
2174         };
2175
2176         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2177                        NULL);
2178         if (rc)
2179                 goto notify_exit;
2180
2181         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2182                                 notify.watch_tree, notify.completion_filter,
2183                                 notify.data_len, &returned_ioctl_info, &ret_len);
2184
2185         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2186
2187         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2188         if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2189                 if (ret_len > notify.data_len)
2190                         ret_len = notify.data_len;
2191                 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2192                 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2193                         rc = -EFAULT;
2194                 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2195                         rc = -EFAULT;
2196         }
2197         kfree(returned_ioctl_info);
2198 notify_exit:
2199         free_dentry_path(page);
2200         kfree(utf16_path);
2201         return rc;
2202 }
2203
2204 static int
2205 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2206                      const char *path, struct cifs_sb_info *cifs_sb,
2207                      struct cifs_fid *fid, __u16 search_flags,
2208                      struct cifs_search_info *srch_inf)
2209 {
2210         __le16 *utf16_path;
2211         struct smb_rqst rqst[2];
2212         struct kvec rsp_iov[2];
2213         int resp_buftype[2];
2214         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2215         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2216         int rc, flags = 0;
2217         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2218         struct cifs_open_parms oparms;
2219         struct smb2_query_directory_rsp *qd_rsp = NULL;
2220         struct smb2_create_rsp *op_rsp = NULL;
2221         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2222         int retry_count = 0;
2223
2224         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2225         if (!utf16_path)
2226                 return -ENOMEM;
2227
2228         if (smb3_encryption_required(tcon))
2229                 flags |= CIFS_TRANSFORM_REQ;
2230
2231         memset(rqst, 0, sizeof(rqst));
2232         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2233         memset(rsp_iov, 0, sizeof(rsp_iov));
2234
2235         /* Open */
2236         memset(&open_iov, 0, sizeof(open_iov));
2237         rqst[0].rq_iov = open_iov;
2238         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2239
2240         oparms = (struct cifs_open_parms) {
2241                 .tcon = tcon,
2242                 .path = path,
2243                 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2244                 .disposition = FILE_OPEN,
2245                 .create_options = cifs_create_options(cifs_sb, 0),
2246                 .fid = fid,
2247         };
2248
2249         rc = SMB2_open_init(tcon, server,
2250                             &rqst[0], &oplock, &oparms, utf16_path);
2251         if (rc)
2252                 goto qdf_free;
2253         smb2_set_next_command(tcon, &rqst[0]);
2254
2255         /* Query directory */
2256         srch_inf->entries_in_buffer = 0;
2257         srch_inf->index_of_last_entry = 2;
2258
2259         memset(&qd_iov, 0, sizeof(qd_iov));
2260         rqst[1].rq_iov = qd_iov;
2261         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2262
2263         rc = SMB2_query_directory_init(xid, tcon, server,
2264                                        &rqst[1],
2265                                        COMPOUND_FID, COMPOUND_FID,
2266                                        0, srch_inf->info_level);
2267         if (rc)
2268                 goto qdf_free;
2269
2270         smb2_set_related(&rqst[1]);
2271
2272 again:
2273         rc = compound_send_recv(xid, tcon->ses, server,
2274                                 flags, 2, rqst,
2275                                 resp_buftype, rsp_iov);
2276
2277         if (rc == -EAGAIN && retry_count++ < 10)
2278                 goto again;
2279
2280         /* If the open failed there is nothing to do */
2281         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2282         if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2283                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2284                 goto qdf_free;
2285         }
2286         fid->persistent_fid = op_rsp->PersistentFileId;
2287         fid->volatile_fid = op_rsp->VolatileFileId;
2288
2289         /* Anything else than ENODATA means a genuine error */
2290         if (rc && rc != -ENODATA) {
2291                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2292                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2293                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2294                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2295                 goto qdf_free;
2296         }
2297
2298         atomic_inc(&tcon->num_remote_opens);
2299
2300         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2301         if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2302                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2303                                           tcon->tid, tcon->ses->Suid, 0, 0);
2304                 srch_inf->endOfSearch = true;
2305                 rc = 0;
2306                 goto qdf_free;
2307         }
2308
2309         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2310                                         srch_inf);
2311         if (rc) {
2312                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2313                         tcon->ses->Suid, 0, 0, rc);
2314                 goto qdf_free;
2315         }
2316         resp_buftype[1] = CIFS_NO_BUFFER;
2317
2318         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2319                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2320
2321  qdf_free:
2322         kfree(utf16_path);
2323         SMB2_open_free(&rqst[0]);
2324         SMB2_query_directory_free(&rqst[1]);
2325         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2326         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2327         return rc;
2328 }
2329
2330 static int
2331 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2332                     struct cifs_fid *fid, __u16 search_flags,
2333                     struct cifs_search_info *srch_inf)
2334 {
2335         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2336                                     fid->volatile_fid, 0, srch_inf);
2337 }
2338
2339 static int
2340 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2341                struct cifs_fid *fid)
2342 {
2343         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2344 }
2345
2346 /*
2347  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2348  * the number of credits and return true. Otherwise - return false.
2349  */
2350 static bool
2351 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2352 {
2353         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2354         int scredits, in_flight;
2355
2356         if (shdr->Status != STATUS_PENDING)
2357                 return false;
2358
2359         if (shdr->CreditRequest) {
2360                 spin_lock(&server->req_lock);
2361                 server->credits += le16_to_cpu(shdr->CreditRequest);
2362                 scredits = server->credits;
2363                 in_flight = server->in_flight;
2364                 spin_unlock(&server->req_lock);
2365                 wake_up(&server->request_q);
2366
2367                 trace_smb3_pend_credits(server->CurrentMid,
2368                                 server->conn_id, server->hostname, scredits,
2369                                 le16_to_cpu(shdr->CreditRequest), in_flight);
2370                 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2371                                 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2372         }
2373
2374         return true;
2375 }
2376
2377 static bool
2378 smb2_is_session_expired(char *buf)
2379 {
2380         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2381
2382         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2383             shdr->Status != STATUS_USER_SESSION_DELETED)
2384                 return false;
2385
2386         trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2387                                le64_to_cpu(shdr->SessionId),
2388                                le16_to_cpu(shdr->Command),
2389                                le64_to_cpu(shdr->MessageId));
2390         cifs_dbg(FYI, "Session expired or deleted\n");
2391
2392         return true;
2393 }
2394
2395 static bool
2396 smb2_is_status_io_timeout(char *buf)
2397 {
2398         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2399
2400         if (shdr->Status == STATUS_IO_TIMEOUT)
2401                 return true;
2402         else
2403                 return false;
2404 }
2405
2406 static bool
2407 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2408 {
2409         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2410         struct TCP_Server_Info *pserver;
2411         struct cifs_ses *ses;
2412         struct cifs_tcon *tcon;
2413
2414         if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2415                 return false;
2416
2417         /* If server is a channel, select the primary channel */
2418         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2419
2420         spin_lock(&cifs_tcp_ses_lock);
2421         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2422                 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2423                         if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2424                                 spin_lock(&tcon->tc_lock);
2425                                 tcon->need_reconnect = true;
2426                                 spin_unlock(&tcon->tc_lock);
2427                                 spin_unlock(&cifs_tcp_ses_lock);
2428                                 pr_warn_once("Server share %s deleted.\n",
2429                                              tcon->tree_name);
2430                                 return true;
2431                         }
2432                 }
2433         }
2434         spin_unlock(&cifs_tcp_ses_lock);
2435
2436         return false;
2437 }
2438
2439 static int
2440 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2441                 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2442 {
2443         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2444                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2445                                         smb2_get_lease_state(cinode));
2446
2447         return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2448                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2449 }
2450
2451 void
2452 smb2_set_related(struct smb_rqst *rqst)
2453 {
2454         struct smb2_hdr *shdr;
2455
2456         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2457         if (shdr == NULL) {
2458                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2459                 return;
2460         }
2461         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2462 }
2463
2464 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2465
2466 void
2467 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2468 {
2469         struct smb2_hdr *shdr;
2470         struct cifs_ses *ses = tcon->ses;
2471         struct TCP_Server_Info *server = ses->server;
2472         unsigned long len = smb_rqst_len(server, rqst);
2473         int i, num_padding;
2474
2475         shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2476         if (shdr == NULL) {
2477                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2478                 return;
2479         }
2480
2481         /* SMB headers in a compound are 8 byte aligned. */
2482
2483         /* No padding needed */
2484         if (!(len & 7))
2485                 goto finished;
2486
2487         num_padding = 8 - (len & 7);
2488         if (!smb3_encryption_required(tcon)) {
2489                 /*
2490                  * If we do not have encryption then we can just add an extra
2491                  * iov for the padding.
2492                  */
2493                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2494                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2495                 rqst->rq_nvec++;
2496                 len += num_padding;
2497         } else {
2498                 /*
2499                  * We can not add a small padding iov for the encryption case
2500                  * because the encryption framework can not handle the padding
2501                  * iovs.
2502                  * We have to flatten this into a single buffer and add
2503                  * the padding to it.
2504                  */
2505                 for (i = 1; i < rqst->rq_nvec; i++) {
2506                         memcpy(rqst->rq_iov[0].iov_base +
2507                                rqst->rq_iov[0].iov_len,
2508                                rqst->rq_iov[i].iov_base,
2509                                rqst->rq_iov[i].iov_len);
2510                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2511                 }
2512                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2513                        0, num_padding);
2514                 rqst->rq_iov[0].iov_len += num_padding;
2515                 len += num_padding;
2516                 rqst->rq_nvec = 1;
2517         }
2518
2519  finished:
2520         shdr->NextCommand = cpu_to_le32(len);
2521 }
2522
2523 /*
2524  * Passes the query info response back to the caller on success.
2525  * Caller need to free this with free_rsp_buf().
2526  */
2527 int
2528 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2529                          const char *path, u32 desired_access,
2530                          u32 class, u32 type, u32 output_len,
2531                          struct kvec *rsp, int *buftype,
2532                          struct cifs_sb_info *cifs_sb)
2533 {
2534         struct smb2_compound_vars *vars;
2535         struct cifs_ses *ses = tcon->ses;
2536         struct TCP_Server_Info *server = cifs_pick_channel(ses);
2537         int flags = CIFS_CP_CREATE_CLOSE_OP;
2538         struct smb_rqst *rqst;
2539         int resp_buftype[3];
2540         struct kvec *rsp_iov;
2541         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2542         struct cifs_open_parms oparms;
2543         struct cifs_fid fid;
2544         int rc;
2545         __le16 *utf16_path;
2546         struct cached_fid *cfid = NULL;
2547
2548         if (!path)
2549                 path = "";
2550         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2551         if (!utf16_path)
2552                 return -ENOMEM;
2553
2554         if (smb3_encryption_required(tcon))
2555                 flags |= CIFS_TRANSFORM_REQ;
2556
2557         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2558         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2559         if (!vars) {
2560                 rc = -ENOMEM;
2561                 goto out_free_path;
2562         }
2563         rqst = vars->rqst;
2564         rsp_iov = vars->rsp_iov;
2565
2566         /*
2567          * We can only call this for things we know are directories.
2568          */
2569         if (!strcmp(path, ""))
2570                 open_cached_dir(xid, tcon, path, cifs_sb, false,
2571                                 &cfid); /* cfid null if open dir failed */
2572
2573         rqst[0].rq_iov = vars->open_iov;
2574         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2575
2576         oparms = (struct cifs_open_parms) {
2577                 .tcon = tcon,
2578                 .path = path,
2579                 .desired_access = desired_access,
2580                 .disposition = FILE_OPEN,
2581                 .create_options = cifs_create_options(cifs_sb, 0),
2582                 .fid = &fid,
2583         };
2584
2585         rc = SMB2_open_init(tcon, server,
2586                             &rqst[0], &oplock, &oparms, utf16_path);
2587         if (rc)
2588                 goto qic_exit;
2589         smb2_set_next_command(tcon, &rqst[0]);
2590
2591         rqst[1].rq_iov = &vars->qi_iov;
2592         rqst[1].rq_nvec = 1;
2593
2594         if (cfid) {
2595                 rc = SMB2_query_info_init(tcon, server,
2596                                           &rqst[1],
2597                                           cfid->fid.persistent_fid,
2598                                           cfid->fid.volatile_fid,
2599                                           class, type, 0,
2600                                           output_len, 0,
2601                                           NULL);
2602         } else {
2603                 rc = SMB2_query_info_init(tcon, server,
2604                                           &rqst[1],
2605                                           COMPOUND_FID,
2606                                           COMPOUND_FID,
2607                                           class, type, 0,
2608                                           output_len, 0,
2609                                           NULL);
2610         }
2611         if (rc)
2612                 goto qic_exit;
2613         if (!cfid) {
2614                 smb2_set_next_command(tcon, &rqst[1]);
2615                 smb2_set_related(&rqst[1]);
2616         }
2617
2618         rqst[2].rq_iov = &vars->close_iov;
2619         rqst[2].rq_nvec = 1;
2620
2621         rc = SMB2_close_init(tcon, server,
2622                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2623         if (rc)
2624                 goto qic_exit;
2625         smb2_set_related(&rqst[2]);
2626
2627         if (cfid) {
2628                 rc = compound_send_recv(xid, ses, server,
2629                                         flags, 1, &rqst[1],
2630                                         &resp_buftype[1], &rsp_iov[1]);
2631         } else {
2632                 rc = compound_send_recv(xid, ses, server,
2633                                         flags, 3, rqst,
2634                                         resp_buftype, rsp_iov);
2635         }
2636         if (rc) {
2637                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2638                 if (rc == -EREMCHG) {
2639                         tcon->need_reconnect = true;
2640                         pr_warn_once("server share %s deleted\n",
2641                                      tcon->tree_name);
2642                 }
2643                 goto qic_exit;
2644         }
2645         *rsp = rsp_iov[1];
2646         *buftype = resp_buftype[1];
2647
2648  qic_exit:
2649         SMB2_open_free(&rqst[0]);
2650         SMB2_query_info_free(&rqst[1]);
2651         SMB2_close_free(&rqst[2]);
2652         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2653         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2654         if (cfid)
2655                 close_cached_dir(cfid);
2656         kfree(vars);
2657 out_free_path:
2658         kfree(utf16_path);
2659         return rc;
2660 }
2661
2662 static int
2663 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2664              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2665 {
2666         struct smb2_query_info_rsp *rsp;
2667         struct smb2_fs_full_size_info *info = NULL;
2668         struct kvec rsp_iov = {NULL, 0};
2669         int buftype = CIFS_NO_BUFFER;
2670         int rc;
2671
2672
2673         rc = smb2_query_info_compound(xid, tcon, "",
2674                                       FILE_READ_ATTRIBUTES,
2675                                       FS_FULL_SIZE_INFORMATION,
2676                                       SMB2_O_INFO_FILESYSTEM,
2677                                       sizeof(struct smb2_fs_full_size_info),
2678                                       &rsp_iov, &buftype, cifs_sb);
2679         if (rc)
2680                 goto qfs_exit;
2681
2682         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2683         buf->f_type = SMB2_SUPER_MAGIC;
2684         info = (struct smb2_fs_full_size_info *)(
2685                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2686         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2687                                le32_to_cpu(rsp->OutputBufferLength),
2688                                &rsp_iov,
2689                                sizeof(struct smb2_fs_full_size_info));
2690         if (!rc)
2691                 smb2_copy_fs_info_to_kstatfs(info, buf);
2692
2693 qfs_exit:
2694         trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2695         free_rsp_buf(buftype, rsp_iov.iov_base);
2696         return rc;
2697 }
2698
2699 static int
2700 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2701                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2702 {
2703         int rc;
2704         __le16 srch_path = 0; /* Null - open root of share */
2705         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2706         struct cifs_open_parms oparms;
2707         struct cifs_fid fid;
2708
2709         if (!tcon->posix_extensions)
2710                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2711
2712         oparms = (struct cifs_open_parms) {
2713                 .tcon = tcon,
2714                 .path = "",
2715                 .desired_access = FILE_READ_ATTRIBUTES,
2716                 .disposition = FILE_OPEN,
2717                 .create_options = cifs_create_options(cifs_sb, 0),
2718                 .fid = &fid,
2719         };
2720
2721         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2722                        NULL, NULL);
2723         if (rc)
2724                 return rc;
2725
2726         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2727                                    fid.volatile_fid, buf);
2728         buf->f_type = SMB2_SUPER_MAGIC;
2729         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2730         return rc;
2731 }
2732
2733 static bool
2734 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2735 {
2736         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2737                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2738 }
2739
2740 static int
2741 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2742                __u64 length, __u32 type, int lock, int unlock, bool wait)
2743 {
2744         if (unlock && !lock)
2745                 type = SMB2_LOCKFLAG_UNLOCK;
2746         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2747                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2748                          current->tgid, length, offset, type, wait);
2749 }
2750
2751 static void
2752 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2753 {
2754         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2755 }
2756
2757 static void
2758 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2759 {
2760         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2761 }
2762
2763 static void
2764 smb2_new_lease_key(struct cifs_fid *fid)
2765 {
2766         generate_random_uuid(fid->lease_key);
2767 }
2768
2769 static int
2770 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2771                    const char *search_name,
2772                    struct dfs_info3_param **target_nodes,
2773                    unsigned int *num_of_nodes,
2774                    const struct nls_table *nls_codepage, int remap)
2775 {
2776         int rc;
2777         __le16 *utf16_path = NULL;
2778         int utf16_path_len = 0;
2779         struct cifs_tcon *tcon;
2780         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2781         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2782         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2783         int retry_count = 0;
2784
2785         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2786
2787         /*
2788          * Try to use the IPC tcon, otherwise just use any
2789          */
2790         tcon = ses->tcon_ipc;
2791         if (tcon == NULL) {
2792                 spin_lock(&cifs_tcp_ses_lock);
2793                 tcon = list_first_entry_or_null(&ses->tcon_list,
2794                                                 struct cifs_tcon,
2795                                                 tcon_list);
2796                 if (tcon)
2797                         tcon->tc_count++;
2798                 spin_unlock(&cifs_tcp_ses_lock);
2799         }
2800
2801         if (tcon == NULL) {
2802                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2803                          ses);
2804                 rc = -ENOTCONN;
2805                 goto out;
2806         }
2807
2808         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2809                                            &utf16_path_len,
2810                                            nls_codepage, remap);
2811         if (!utf16_path) {
2812                 rc = -ENOMEM;
2813                 goto out;
2814         }
2815
2816         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2817         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2818         if (!dfs_req) {
2819                 rc = -ENOMEM;
2820                 goto out;
2821         }
2822
2823         /* Highest DFS referral version understood */
2824         dfs_req->MaxReferralLevel = DFS_VERSION;
2825
2826         /* Path to resolve in an UTF-16 null-terminated string */
2827         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2828
2829         do {
2830                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2831                                 FSCTL_DFS_GET_REFERRALS,
2832                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2833                                 (char **)&dfs_rsp, &dfs_rsp_size);
2834                 if (!is_retryable_error(rc))
2835                         break;
2836                 usleep_range(512, 2048);
2837         } while (++retry_count < 5);
2838
2839         if (rc) {
2840                 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2841                         cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2842                 goto out;
2843         }
2844
2845         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2846                                  num_of_nodes, target_nodes,
2847                                  nls_codepage, remap, search_name,
2848                                  true /* is_unicode */);
2849         if (rc) {
2850                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2851                 goto out;
2852         }
2853
2854  out:
2855         if (tcon && !tcon->ipc) {
2856                 /* ipc tcons are not refcounted */
2857                 spin_lock(&cifs_tcp_ses_lock);
2858                 tcon->tc_count--;
2859                 /* tc_count can never go negative */
2860                 WARN_ON(tcon->tc_count < 0);
2861                 spin_unlock(&cifs_tcp_ses_lock);
2862         }
2863         kfree(utf16_path);
2864         kfree(dfs_req);
2865         kfree(dfs_rsp);
2866         return rc;
2867 }
2868
2869 static int
2870 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2871                       u32 plen, char **target_path,
2872                       struct cifs_sb_info *cifs_sb)
2873 {
2874         unsigned int len;
2875
2876         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2877         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2878
2879         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2880                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2881                         le64_to_cpu(symlink_buf->InodeType));
2882                 return -EOPNOTSUPP;
2883         }
2884
2885         *target_path = cifs_strndup_from_utf16(
2886                                 symlink_buf->PathBuffer,
2887                                 len, true, cifs_sb->local_nls);
2888         if (!(*target_path))
2889                 return -ENOMEM;
2890
2891         convert_delimiter(*target_path, '/');
2892         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2893
2894         return 0;
2895 }
2896
2897 static int
2898 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2899                       u32 plen, char **target_path,
2900                       struct cifs_sb_info *cifs_sb)
2901 {
2902         unsigned int sub_len;
2903         unsigned int sub_offset;
2904
2905         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2906
2907         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2908         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2909         if (sub_offset + 20 > plen ||
2910             sub_offset + sub_len + 20 > plen) {
2911                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2912                 return -EIO;
2913         }
2914
2915         *target_path = cifs_strndup_from_utf16(
2916                                 symlink_buf->PathBuffer + sub_offset,
2917                                 sub_len, true, cifs_sb->local_nls);
2918         if (!(*target_path))
2919                 return -ENOMEM;
2920
2921         convert_delimiter(*target_path, '/');
2922         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2923
2924         return 0;
2925 }
2926
2927 static int
2928 parse_reparse_point(struct reparse_data_buffer *buf,
2929                     u32 plen, char **target_path,
2930                     struct cifs_sb_info *cifs_sb)
2931 {
2932         if (plen < sizeof(struct reparse_data_buffer)) {
2933                 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2934                          plen);
2935                 return -EIO;
2936         }
2937
2938         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2939             sizeof(struct reparse_data_buffer)) {
2940                 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2941                          plen);
2942                 return -EIO;
2943         }
2944
2945         /* See MS-FSCC 2.1.2 */
2946         switch (le32_to_cpu(buf->ReparseTag)) {
2947         case IO_REPARSE_TAG_NFS:
2948                 return parse_reparse_posix(
2949                         (struct reparse_posix_data *)buf,
2950                         plen, target_path, cifs_sb);
2951         case IO_REPARSE_TAG_SYMLINK:
2952                 return parse_reparse_symlink(
2953                         (struct reparse_symlink_data_buffer *)buf,
2954                         plen, target_path, cifs_sb);
2955         default:
2956                 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2957                          le32_to_cpu(buf->ReparseTag));
2958                 return -EOPNOTSUPP;
2959         }
2960 }
2961
2962 static int smb2_query_symlink(const unsigned int xid,
2963                               struct cifs_tcon *tcon,
2964                               struct cifs_sb_info *cifs_sb,
2965                               const char *full_path,
2966                               char **target_path,
2967                               struct kvec *rsp_iov)
2968 {
2969         struct reparse_data_buffer *buf;
2970         struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2971         u32 plen = le32_to_cpu(io->OutputCount);
2972
2973         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2974
2975         buf = (struct reparse_data_buffer *)((u8 *)io +
2976                                              le32_to_cpu(io->OutputOffset));
2977         return parse_reparse_point(buf, plen, target_path, cifs_sb);
2978 }
2979
2980 static int smb2_query_reparse_point(const unsigned int xid,
2981                                     struct cifs_tcon *tcon,
2982                                     struct cifs_sb_info *cifs_sb,
2983                                     const char *full_path,
2984                                     u32 *tag, struct kvec *rsp,
2985                                     int *rsp_buftype)
2986 {
2987         struct smb2_compound_vars *vars;
2988         int rc;
2989         __le16 *utf16_path = NULL;
2990         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2991         struct cifs_open_parms oparms;
2992         struct cifs_fid fid;
2993         struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2994         int flags = CIFS_CP_CREATE_CLOSE_OP;
2995         struct smb_rqst *rqst;
2996         int resp_buftype[3];
2997         struct kvec *rsp_iov;
2998         struct smb2_ioctl_rsp *ioctl_rsp;
2999         struct reparse_data_buffer *reparse_buf;
3000         u32 plen;
3001
3002         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3003
3004         if (smb3_encryption_required(tcon))
3005                 flags |= CIFS_TRANSFORM_REQ;
3006
3007         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3008         if (!utf16_path)
3009                 return -ENOMEM;
3010
3011         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3012         vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3013         if (!vars) {
3014                 rc = -ENOMEM;
3015                 goto out_free_path;
3016         }
3017         rqst = vars->rqst;
3018         rsp_iov = vars->rsp_iov;
3019
3020         /*
3021          * setup smb2open - TODO add optimization to call cifs_get_readable_path
3022          * to see if there is a handle already open that we can use
3023          */
3024         rqst[0].rq_iov = vars->open_iov;
3025         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3026
3027         oparms = (struct cifs_open_parms) {
3028                 .tcon = tcon,
3029                 .path = full_path,
3030                 .desired_access = FILE_READ_ATTRIBUTES,
3031                 .disposition = FILE_OPEN,
3032                 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3033                 .fid = &fid,
3034         };
3035
3036         rc = SMB2_open_init(tcon, server,
3037                             &rqst[0], &oplock, &oparms, utf16_path);
3038         if (rc)
3039                 goto query_rp_exit;
3040         smb2_set_next_command(tcon, &rqst[0]);
3041
3042
3043         /* IOCTL */
3044         rqst[1].rq_iov = vars->io_iov;
3045         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3046
3047         rc = SMB2_ioctl_init(tcon, server,
3048                              &rqst[1], COMPOUND_FID,
3049                              COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3050                              CIFSMaxBufSize -
3051                              MAX_SMB2_CREATE_RESPONSE_SIZE -
3052                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
3053         if (rc)
3054                 goto query_rp_exit;
3055
3056         smb2_set_next_command(tcon, &rqst[1]);
3057         smb2_set_related(&rqst[1]);
3058
3059         /* Close */
3060         rqst[2].rq_iov = &vars->close_iov;
3061         rqst[2].rq_nvec = 1;
3062
3063         rc = SMB2_close_init(tcon, server,
3064                              &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3065         if (rc)
3066                 goto query_rp_exit;
3067
3068         smb2_set_related(&rqst[2]);
3069
3070         rc = compound_send_recv(xid, tcon->ses, server,
3071                                 flags, 3, rqst,
3072                                 resp_buftype, rsp_iov);
3073
3074         ioctl_rsp = rsp_iov[1].iov_base;
3075
3076         /*
3077          * Open was successful and we got an ioctl response.
3078          */
3079         if (rc == 0) {
3080                 /* See MS-FSCC 2.3.23 */
3081
3082                 reparse_buf = (struct reparse_data_buffer *)
3083                         ((char *)ioctl_rsp +
3084                          le32_to_cpu(ioctl_rsp->OutputOffset));
3085                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3086
3087                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3088                     rsp_iov[1].iov_len) {
3089                         cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3090                                  plen);
3091                         rc = -EIO;
3092                         goto query_rp_exit;
3093                 }
3094                 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3095                 *rsp = rsp_iov[1];
3096                 *rsp_buftype = resp_buftype[1];
3097                 resp_buftype[1] = CIFS_NO_BUFFER;
3098         }
3099
3100  query_rp_exit:
3101         SMB2_open_free(&rqst[0]);
3102         SMB2_ioctl_free(&rqst[1]);
3103         SMB2_close_free(&rqst[2]);
3104         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3105         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3106         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3107         kfree(vars);
3108 out_free_path:
3109         kfree(utf16_path);
3110         return rc;
3111 }
3112
3113 static struct cifs_ntsd *
3114 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3115                     const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3116 {
3117         struct cifs_ntsd *pntsd = NULL;
3118         unsigned int xid;
3119         int rc = -EOPNOTSUPP;
3120         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3121
3122         if (IS_ERR(tlink))
3123                 return ERR_CAST(tlink);
3124
3125         xid = get_xid();
3126         cifs_dbg(FYI, "trying to get acl\n");
3127
3128         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3129                             cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3130                             info);
3131         free_xid(xid);
3132
3133         cifs_put_tlink(tlink);
3134
3135         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3136         if (rc)
3137                 return ERR_PTR(rc);
3138         return pntsd;
3139
3140 }
3141
3142 static struct cifs_ntsd *
3143 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3144                      const char *path, u32 *pacllen, u32 info)
3145 {
3146         struct cifs_ntsd *pntsd = NULL;
3147         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3148         unsigned int xid;
3149         int rc;
3150         struct cifs_tcon *tcon;
3151         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3152         struct cifs_fid fid;
3153         struct cifs_open_parms oparms;
3154         __le16 *utf16_path;
3155
3156         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3157         if (IS_ERR(tlink))
3158                 return ERR_CAST(tlink);
3159
3160         tcon = tlink_tcon(tlink);
3161         xid = get_xid();
3162
3163         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3164         if (!utf16_path) {
3165                 rc = -ENOMEM;
3166                 free_xid(xid);
3167                 return ERR_PTR(rc);
3168         }
3169
3170         oparms = (struct cifs_open_parms) {
3171                 .tcon = tcon,
3172                 .path = path,
3173                 .desired_access = READ_CONTROL,
3174                 .disposition = FILE_OPEN,
3175                 /*
3176                  * When querying an ACL, even if the file is a symlink
3177                  * we want to open the source not the target, and so
3178                  * the protocol requires that the client specify this
3179                  * flag when opening a reparse point
3180                  */
3181                 .create_options = cifs_create_options(cifs_sb, 0) |
3182                                   OPEN_REPARSE_POINT,
3183                 .fid = &fid,
3184         };
3185
3186         if (info & SACL_SECINFO)
3187                 oparms.desired_access |= SYSTEM_SECURITY;
3188
3189         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3190                        NULL);
3191         kfree(utf16_path);
3192         if (!rc) {
3193                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3194                                     fid.volatile_fid, (void **)&pntsd, pacllen,
3195                                     info);
3196                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3197         }
3198
3199         cifs_put_tlink(tlink);
3200         free_xid(xid);
3201
3202         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3203         if (rc)
3204                 return ERR_PTR(rc);
3205         return pntsd;
3206 }
3207
3208 static int
3209 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3210                 struct inode *inode, const char *path, int aclflag)
3211 {
3212         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3213         unsigned int xid;
3214         int rc, access_flags = 0;
3215         struct cifs_tcon *tcon;
3216         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3217         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3218         struct cifs_fid fid;
3219         struct cifs_open_parms oparms;
3220         __le16 *utf16_path;
3221
3222         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3223         if (IS_ERR(tlink))
3224                 return PTR_ERR(tlink);
3225
3226         tcon = tlink_tcon(tlink);
3227         xid = get_xid();
3228
3229         if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3230                 access_flags |= WRITE_OWNER;
3231         if (aclflag & CIFS_ACL_SACL)
3232                 access_flags |= SYSTEM_SECURITY;
3233         if (aclflag & CIFS_ACL_DACL)
3234                 access_flags |= WRITE_DAC;
3235
3236         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3237         if (!utf16_path) {
3238                 rc = -ENOMEM;
3239                 free_xid(xid);
3240                 return rc;
3241         }
3242
3243         oparms = (struct cifs_open_parms) {
3244                 .tcon = tcon,
3245                 .desired_access = access_flags,
3246                 .create_options = cifs_create_options(cifs_sb, 0),
3247                 .disposition = FILE_OPEN,
3248                 .path = path,
3249                 .fid = &fid,
3250         };
3251
3252         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3253                        NULL, NULL);
3254         kfree(utf16_path);
3255         if (!rc) {
3256                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3257                             fid.volatile_fid, pnntsd, acllen, aclflag);
3258                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3259         }
3260
3261         cifs_put_tlink(tlink);
3262         free_xid(xid);
3263         return rc;
3264 }
3265
3266 /* Retrieve an ACL from the server */
3267 static struct cifs_ntsd *
3268 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3269              struct inode *inode, const char *path,
3270              u32 *pacllen, u32 info)
3271 {
3272         struct cifs_ntsd *pntsd = NULL;
3273         struct cifsFileInfo *open_file = NULL;
3274
3275         if (inode && !(info & SACL_SECINFO))
3276                 open_file = find_readable_file(CIFS_I(inode), true);
3277         if (!open_file || (info & SACL_SECINFO))
3278                 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3279
3280         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3281         cifsFileInfo_put(open_file);
3282         return pntsd;
3283 }
3284
3285 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3286                              loff_t offset, loff_t len, unsigned int xid)
3287 {
3288         struct cifsFileInfo *cfile = file->private_data;
3289         struct file_zero_data_information fsctl_buf;
3290
3291         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3292
3293         fsctl_buf.FileOffset = cpu_to_le64(offset);
3294         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3295
3296         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3297                           cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3298                           (char *)&fsctl_buf,
3299                           sizeof(struct file_zero_data_information),
3300                           0, NULL, NULL);
3301 }
3302
3303 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3304                             loff_t offset, loff_t len, bool keep_size)
3305 {
3306         struct cifs_ses *ses = tcon->ses;
3307         struct inode *inode = file_inode(file);
3308         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3309         struct cifsFileInfo *cfile = file->private_data;
3310         long rc;
3311         unsigned int xid;
3312         __le64 eof;
3313
3314         xid = get_xid();
3315
3316         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3317                               ses->Suid, offset, len);
3318
3319         inode_lock(inode);
3320         filemap_invalidate_lock(inode->i_mapping);
3321
3322         /*
3323          * We zero the range through ioctl, so we need remove the page caches
3324          * first, otherwise the data may be inconsistent with the server.
3325          */
3326         truncate_pagecache_range(inode, offset, offset + len - 1);
3327
3328         /* if file not oplocked can't be sure whether asking to extend size */
3329         rc = -EOPNOTSUPP;
3330         if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3331                 goto zero_range_exit;
3332
3333         rc = smb3_zero_data(file, tcon, offset, len, xid);
3334         if (rc < 0)
3335                 goto zero_range_exit;
3336
3337         /*
3338          * do we also need to change the size of the file?
3339          */
3340         if (keep_size == false && i_size_read(inode) < offset + len) {
3341                 eof = cpu_to_le64(offset + len);
3342                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3343                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3344         }
3345
3346  zero_range_exit:
3347         filemap_invalidate_unlock(inode->i_mapping);
3348         inode_unlock(inode);
3349         free_xid(xid);
3350         if (rc)
3351                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3352                               ses->Suid, offset, len, rc);
3353         else
3354                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3355                               ses->Suid, offset, len);
3356         return rc;
3357 }
3358
3359 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3360                             loff_t offset, loff_t len)
3361 {
3362         struct inode *inode = file_inode(file);
3363         struct cifsFileInfo *cfile = file->private_data;
3364         struct file_zero_data_information fsctl_buf;
3365         long rc;
3366         unsigned int xid;
3367         __u8 set_sparse = 1;
3368
3369         xid = get_xid();
3370
3371         inode_lock(inode);
3372         /* Need to make file sparse, if not already, before freeing range. */
3373         /* Consider adding equivalent for compressed since it could also work */
3374         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3375                 rc = -EOPNOTSUPP;
3376                 goto out;
3377         }
3378
3379         filemap_invalidate_lock(inode->i_mapping);
3380         /*
3381          * We implement the punch hole through ioctl, so we need remove the page
3382          * caches first, otherwise the data may be inconsistent with the server.
3383          */
3384         truncate_pagecache_range(inode, offset, offset + len - 1);
3385
3386         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3387
3388         fsctl_buf.FileOffset = cpu_to_le64(offset);
3389         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3390
3391         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3392                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3393                         (char *)&fsctl_buf,
3394                         sizeof(struct file_zero_data_information),
3395                         CIFSMaxBufSize, NULL, NULL);
3396         filemap_invalidate_unlock(inode->i_mapping);
3397 out:
3398         inode_unlock(inode);
3399         free_xid(xid);
3400         return rc;
3401 }
3402
3403 static int smb3_simple_fallocate_write_range(unsigned int xid,
3404                                              struct cifs_tcon *tcon,
3405                                              struct cifsFileInfo *cfile,
3406                                              loff_t off, loff_t len,
3407                                              char *buf)
3408 {
3409         struct cifs_io_parms io_parms = {0};
3410         int nbytes;
3411         int rc = 0;
3412         struct kvec iov[2];
3413
3414         io_parms.netfid = cfile->fid.netfid;
3415         io_parms.pid = current->tgid;
3416         io_parms.tcon = tcon;
3417         io_parms.persistent_fid = cfile->fid.persistent_fid;
3418         io_parms.volatile_fid = cfile->fid.volatile_fid;
3419
3420         while (len) {
3421                 io_parms.offset = off;
3422                 io_parms.length = len;
3423                 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3424                         io_parms.length = SMB2_MAX_BUFFER_SIZE;
3425                 /* iov[0] is reserved for smb header */
3426                 iov[1].iov_base = buf;
3427                 iov[1].iov_len = io_parms.length;
3428                 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3429                 if (rc)
3430                         break;
3431                 if (nbytes > len)
3432                         return -EINVAL;
3433                 buf += nbytes;
3434                 off += nbytes;
3435                 len -= nbytes;
3436         }
3437         return rc;
3438 }
3439
3440 static int smb3_simple_fallocate_range(unsigned int xid,
3441                                        struct cifs_tcon *tcon,
3442                                        struct cifsFileInfo *cfile,
3443                                        loff_t off, loff_t len)
3444 {
3445         struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3446         u32 out_data_len;
3447         char *buf = NULL;
3448         loff_t l;
3449         int rc;
3450
3451         in_data.file_offset = cpu_to_le64(off);
3452         in_data.length = cpu_to_le64(len);
3453         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3454                         cfile->fid.volatile_fid,
3455                         FSCTL_QUERY_ALLOCATED_RANGES,
3456                         (char *)&in_data, sizeof(in_data),
3457                         1024 * sizeof(struct file_allocated_range_buffer),
3458                         (char **)&out_data, &out_data_len);
3459         if (rc)
3460                 goto out;
3461
3462         buf = kzalloc(1024 * 1024, GFP_KERNEL);
3463         if (buf == NULL) {
3464                 rc = -ENOMEM;
3465                 goto out;
3466         }
3467
3468         tmp_data = out_data;
3469         while (len) {
3470                 /*
3471                  * The rest of the region is unmapped so write it all.
3472                  */
3473                 if (out_data_len == 0) {
3474                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3475                                                cfile, off, len, buf);
3476                         goto out;
3477                 }
3478
3479                 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3480                         rc = -EINVAL;
3481                         goto out;
3482                 }
3483
3484                 if (off < le64_to_cpu(tmp_data->file_offset)) {
3485                         /*
3486                          * We are at a hole. Write until the end of the region
3487                          * or until the next allocated data,
3488                          * whichever comes next.
3489                          */
3490                         l = le64_to_cpu(tmp_data->file_offset) - off;
3491                         if (len < l)
3492                                 l = len;
3493                         rc = smb3_simple_fallocate_write_range(xid, tcon,
3494                                                cfile, off, l, buf);
3495                         if (rc)
3496                                 goto out;
3497                         off = off + l;
3498                         len = len - l;
3499                         if (len == 0)
3500                                 goto out;
3501                 }
3502                 /*
3503                  * We are at a section of allocated data, just skip forward
3504                  * until the end of the data or the end of the region
3505                  * we are supposed to fallocate, whichever comes first.
3506                  */
3507                 l = le64_to_cpu(tmp_data->length);
3508                 if (len < l)
3509                         l = len;
3510                 off += l;
3511                 len -= l;
3512
3513                 tmp_data = &tmp_data[1];
3514                 out_data_len -= sizeof(struct file_allocated_range_buffer);
3515         }
3516
3517  out:
3518         kfree(out_data);
3519         kfree(buf);
3520         return rc;
3521 }
3522
3523
3524 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3525                             loff_t off, loff_t len, bool keep_size)
3526 {
3527         struct inode *inode;
3528         struct cifsInodeInfo *cifsi;
3529         struct cifsFileInfo *cfile = file->private_data;
3530         long rc = -EOPNOTSUPP;
3531         unsigned int xid;
3532         __le64 eof;
3533
3534         xid = get_xid();
3535
3536         inode = d_inode(cfile->dentry);
3537         cifsi = CIFS_I(inode);
3538
3539         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3540                                 tcon->ses->Suid, off, len);
3541         /* if file not oplocked can't be sure whether asking to extend size */
3542         if (!CIFS_CACHE_READ(cifsi))
3543                 if (keep_size == false) {
3544                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3545                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3546                         free_xid(xid);
3547                         return rc;
3548                 }
3549
3550         /*
3551          * Extending the file
3552          */
3553         if ((keep_size == false) && i_size_read(inode) < off + len) {
3554                 rc = inode_newsize_ok(inode, off + len);
3555                 if (rc)
3556                         goto out;
3557
3558                 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3559                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3560
3561                 eof = cpu_to_le64(off + len);
3562                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3563                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3564                 if (rc == 0) {
3565                         cifsi->server_eof = off + len;
3566                         cifs_setsize(inode, off + len);
3567                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3568                         truncate_setsize(inode, off + len);
3569                 }
3570                 goto out;
3571         }
3572
3573         /*
3574          * Files are non-sparse by default so falloc may be a no-op
3575          * Must check if file sparse. If not sparse, and since we are not
3576          * extending then no need to do anything since file already allocated
3577          */
3578         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3579                 rc = 0;
3580                 goto out;
3581         }
3582
3583         if (keep_size == true) {
3584                 /*
3585                  * We can not preallocate pages beyond the end of the file
3586                  * in SMB2
3587                  */
3588                 if (off >= i_size_read(inode)) {
3589                         rc = 0;
3590                         goto out;
3591                 }
3592                 /*
3593                  * For fallocates that are partially beyond the end of file,
3594                  * clamp len so we only fallocate up to the end of file.
3595                  */
3596                 if (off + len > i_size_read(inode)) {
3597                         len = i_size_read(inode) - off;
3598                 }
3599         }
3600
3601         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3602                 /*
3603                  * At this point, we are trying to fallocate an internal
3604                  * regions of a sparse file. Since smb2 does not have a
3605                  * fallocate command we have two otions on how to emulate this.
3606                  * We can either turn the entire file to become non-sparse
3607                  * which we only do if the fallocate is for virtually
3608                  * the whole file,  or we can overwrite the region with zeroes
3609                  * using SMB2_write, which could be prohibitevly expensive
3610                  * if len is large.
3611                  */
3612                 /*
3613                  * We are only trying to fallocate a small region so
3614                  * just write it with zero.
3615                  */
3616                 if (len <= 1024 * 1024) {
3617                         rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3618                                                          off, len);
3619                         goto out;
3620                 }
3621
3622                 /*
3623                  * Check if falloc starts within first few pages of file
3624                  * and ends within a few pages of the end of file to
3625                  * ensure that most of file is being forced to be
3626                  * fallocated now. If so then setting whole file sparse
3627                  * ie potentially making a few extra pages at the beginning
3628                  * or end of the file non-sparse via set_sparse is harmless.
3629                  */
3630                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3631                         rc = -EOPNOTSUPP;
3632                         goto out;
3633                 }
3634         }
3635
3636         smb2_set_sparse(xid, tcon, cfile, inode, false);
3637         rc = 0;
3638
3639 out:
3640         if (rc)
3641                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3642                                 tcon->ses->Suid, off, len, rc);
3643         else
3644                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3645                                 tcon->ses->Suid, off, len);
3646
3647         free_xid(xid);
3648         return rc;
3649 }
3650
3651 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3652                             loff_t off, loff_t len)
3653 {
3654         int rc;
3655         unsigned int xid;
3656         struct inode *inode = file_inode(file);
3657         struct cifsFileInfo *cfile = file->private_data;
3658         struct cifsInodeInfo *cifsi = CIFS_I(inode);
3659         __le64 eof;
3660         loff_t old_eof;
3661
3662         xid = get_xid();
3663
3664         inode_lock(inode);
3665
3666         old_eof = i_size_read(inode);
3667         if ((off >= old_eof) ||
3668             off + len >= old_eof) {
3669                 rc = -EINVAL;
3670                 goto out;
3671         }
3672
3673         filemap_invalidate_lock(inode->i_mapping);
3674         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3675         if (rc < 0)
3676                 goto out_2;
3677
3678         truncate_pagecache_range(inode, off, old_eof);
3679
3680         rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3681                                   old_eof - off - len, off);
3682         if (rc < 0)
3683                 goto out_2;
3684
3685         eof = cpu_to_le64(old_eof - len);
3686         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3687                           cfile->fid.volatile_fid, cfile->pid, &eof);
3688         if (rc < 0)
3689                 goto out_2;
3690
3691         rc = 0;
3692
3693         cifsi->server_eof = i_size_read(inode) - len;
3694         truncate_setsize(inode, cifsi->server_eof);
3695         fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3696 out_2:
3697         filemap_invalidate_unlock(inode->i_mapping);
3698  out:
3699         inode_unlock(inode);
3700         free_xid(xid);
3701         return rc;
3702 }
3703
3704 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3705                               loff_t off, loff_t len)
3706 {
3707         int rc;
3708         unsigned int xid;
3709         struct cifsFileInfo *cfile = file->private_data;
3710         struct inode *inode = file_inode(file);
3711         __le64 eof;
3712         __u64  count, old_eof;
3713
3714         xid = get_xid();
3715
3716         inode_lock(inode);
3717
3718         old_eof = i_size_read(inode);
3719         if (off >= old_eof) {
3720                 rc = -EINVAL;
3721                 goto out;
3722         }
3723
3724         count = old_eof - off;
3725         eof = cpu_to_le64(old_eof + len);
3726
3727         filemap_invalidate_lock(inode->i_mapping);
3728         rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3729         if (rc < 0)
3730                 goto out_2;
3731         truncate_pagecache_range(inode, off, old_eof);
3732
3733         rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3734                           cfile->fid.volatile_fid, cfile->pid, &eof);
3735         if (rc < 0)
3736                 goto out_2;
3737
3738         rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3739         if (rc < 0)
3740                 goto out_2;
3741
3742         rc = smb3_zero_data(file, tcon, off, len, xid);
3743         if (rc < 0)
3744                 goto out_2;
3745
3746         rc = 0;
3747 out_2:
3748         filemap_invalidate_unlock(inode->i_mapping);
3749  out:
3750         inode_unlock(inode);
3751         free_xid(xid);
3752         return rc;
3753 }
3754
3755 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3756 {
3757         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3758         struct cifsInodeInfo *cifsi;
3759         struct inode *inode;
3760         int rc = 0;
3761         struct file_allocated_range_buffer in_data, *out_data = NULL;
3762         u32 out_data_len;
3763         unsigned int xid;
3764
3765         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3766                 return generic_file_llseek(file, offset, whence);
3767
3768         inode = d_inode(cfile->dentry);
3769         cifsi = CIFS_I(inode);
3770
3771         if (offset < 0 || offset >= i_size_read(inode))
3772                 return -ENXIO;
3773
3774         xid = get_xid();
3775         /*
3776          * We need to be sure that all dirty pages are written as they
3777          * might fill holes on the server.
3778          * Note that we also MUST flush any written pages since at least
3779          * some servers (Windows2016) will not reflect recent writes in
3780          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3781          */
3782         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3783         if (wrcfile) {
3784                 filemap_write_and_wait(inode->i_mapping);
3785                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3786                 cifsFileInfo_put(wrcfile);
3787         }
3788
3789         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3790                 if (whence == SEEK_HOLE)
3791                         offset = i_size_read(inode);
3792                 goto lseek_exit;
3793         }
3794
3795         in_data.file_offset = cpu_to_le64(offset);
3796         in_data.length = cpu_to_le64(i_size_read(inode));
3797
3798         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3799                         cfile->fid.volatile_fid,
3800                         FSCTL_QUERY_ALLOCATED_RANGES,
3801                         (char *)&in_data, sizeof(in_data),
3802                         sizeof(struct file_allocated_range_buffer),
3803                         (char **)&out_data, &out_data_len);
3804         if (rc == -E2BIG)
3805                 rc = 0;
3806         if (rc)
3807                 goto lseek_exit;
3808
3809         if (whence == SEEK_HOLE && out_data_len == 0)
3810                 goto lseek_exit;
3811
3812         if (whence == SEEK_DATA && out_data_len == 0) {
3813                 rc = -ENXIO;
3814                 goto lseek_exit;
3815         }
3816
3817         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3818                 rc = -EINVAL;
3819                 goto lseek_exit;
3820         }
3821         if (whence == SEEK_DATA) {
3822                 offset = le64_to_cpu(out_data->file_offset);
3823                 goto lseek_exit;
3824         }
3825         if (offset < le64_to_cpu(out_data->file_offset))
3826                 goto lseek_exit;
3827
3828         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3829
3830  lseek_exit:
3831         free_xid(xid);
3832         kfree(out_data);
3833         if (!rc)
3834                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3835         else
3836                 return rc;
3837 }
3838
3839 static int smb3_fiemap(struct cifs_tcon *tcon,
3840                        struct cifsFileInfo *cfile,
3841                        struct fiemap_extent_info *fei, u64 start, u64 len)
3842 {
3843         unsigned int xid;
3844         struct file_allocated_range_buffer in_data, *out_data;
3845         u32 out_data_len;
3846         int i, num, rc, flags, last_blob;
3847         u64 next;
3848
3849         rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3850         if (rc)
3851                 return rc;
3852
3853         xid = get_xid();
3854  again:
3855         in_data.file_offset = cpu_to_le64(start);
3856         in_data.length = cpu_to_le64(len);
3857
3858         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3859                         cfile->fid.volatile_fid,
3860                         FSCTL_QUERY_ALLOCATED_RANGES,
3861                         (char *)&in_data, sizeof(in_data),
3862                         1024 * sizeof(struct file_allocated_range_buffer),
3863                         (char **)&out_data, &out_data_len);
3864         if (rc == -E2BIG) {
3865                 last_blob = 0;
3866                 rc = 0;
3867         } else
3868                 last_blob = 1;
3869         if (rc)
3870                 goto out;
3871
3872         if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3873                 rc = -EINVAL;
3874                 goto out;
3875         }
3876         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3877                 rc = -EINVAL;
3878                 goto out;
3879         }
3880
3881         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3882         for (i = 0; i < num; i++) {
3883                 flags = 0;
3884                 if (i == num - 1 && last_blob)
3885                         flags |= FIEMAP_EXTENT_LAST;
3886
3887                 rc = fiemap_fill_next_extent(fei,
3888                                 le64_to_cpu(out_data[i].file_offset),
3889                                 le64_to_cpu(out_data[i].file_offset),
3890                                 le64_to_cpu(out_data[i].length),
3891                                 flags);
3892                 if (rc < 0)
3893                         goto out;
3894                 if (rc == 1) {
3895                         rc = 0;
3896                         goto out;
3897                 }
3898         }
3899
3900         if (!last_blob) {
3901                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3902                   le64_to_cpu(out_data[num - 1].length);
3903                 len = len - (next - start);
3904                 start = next;
3905                 goto again;
3906         }
3907
3908  out:
3909         free_xid(xid);
3910         kfree(out_data);
3911         return rc;
3912 }
3913
3914 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3915                            loff_t off, loff_t len)
3916 {
3917         /* KEEP_SIZE already checked for by do_fallocate */
3918         if (mode & FALLOC_FL_PUNCH_HOLE)
3919                 return smb3_punch_hole(file, tcon, off, len);
3920         else if (mode & FALLOC_FL_ZERO_RANGE) {
3921                 if (mode & FALLOC_FL_KEEP_SIZE)
3922                         return smb3_zero_range(file, tcon, off, len, true);
3923                 return smb3_zero_range(file, tcon, off, len, false);
3924         } else if (mode == FALLOC_FL_KEEP_SIZE)
3925                 return smb3_simple_falloc(file, tcon, off, len, true);
3926         else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3927                 return smb3_collapse_range(file, tcon, off, len);
3928         else if (mode == FALLOC_FL_INSERT_RANGE)
3929                 return smb3_insert_range(file, tcon, off, len);
3930         else if (mode == 0)
3931                 return smb3_simple_falloc(file, tcon, off, len, false);
3932
3933         return -EOPNOTSUPP;
3934 }
3935
3936 static void
3937 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3938                       struct cifsInodeInfo *cinode, __u32 oplock,
3939                       unsigned int epoch, bool *purge_cache)
3940 {
3941         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3942 }
3943
3944 static void
3945 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3946                        unsigned int epoch, bool *purge_cache);
3947
3948 static void
3949 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3950                        struct cifsInodeInfo *cinode, __u32 oplock,
3951                        unsigned int epoch, bool *purge_cache)
3952 {
3953         unsigned int old_state = cinode->oplock;
3954         unsigned int old_epoch = cinode->epoch;
3955         unsigned int new_state;
3956
3957         if (epoch > old_epoch) {
3958                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3959                 cinode->epoch = epoch;
3960         }
3961
3962         new_state = cinode->oplock;
3963         *purge_cache = false;
3964
3965         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3966             (new_state & CIFS_CACHE_READ_FLG) == 0)
3967                 *purge_cache = true;
3968         else if (old_state == new_state && (epoch - old_epoch > 1))
3969                 *purge_cache = true;
3970 }
3971
3972 static void
3973 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3974                       unsigned int epoch, bool *purge_cache)
3975 {
3976         oplock &= 0xFF;
3977         cinode->lease_granted = false;
3978         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3979                 return;
3980         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3981                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3982                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3983                          &cinode->netfs.inode);
3984         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3985                 cinode->oplock = CIFS_CACHE_RW_FLG;
3986                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3987                          &cinode->netfs.inode);
3988         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3989                 cinode->oplock = CIFS_CACHE_READ_FLG;
3990                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3991                          &cinode->netfs.inode);
3992         } else
3993                 cinode->oplock = 0;
3994 }
3995
3996 static void
3997 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3998                        unsigned int epoch, bool *purge_cache)
3999 {
4000         char message[5] = {0};
4001         unsigned int new_oplock = 0;
4002
4003         oplock &= 0xFF;
4004         cinode->lease_granted = true;
4005         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4006                 return;
4007
4008         /* Check if the server granted an oplock rather than a lease */
4009         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4010                 return smb2_set_oplock_level(cinode, oplock, epoch,
4011                                              purge_cache);
4012
4013         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4014                 new_oplock |= CIFS_CACHE_READ_FLG;
4015                 strcat(message, "R");
4016         }
4017         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4018                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4019                 strcat(message, "H");
4020         }
4021         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4022                 new_oplock |= CIFS_CACHE_WRITE_FLG;
4023                 strcat(message, "W");
4024         }
4025         if (!new_oplock)
4026                 strncpy(message, "None", sizeof(message));
4027
4028         cinode->oplock = new_oplock;
4029         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4030                  &cinode->netfs.inode);
4031 }
4032
4033 static void
4034 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4035                       unsigned int epoch, bool *purge_cache)
4036 {
4037         unsigned int old_oplock = cinode->oplock;
4038
4039         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4040
4041         if (purge_cache) {
4042                 *purge_cache = false;
4043                 if (old_oplock == CIFS_CACHE_READ_FLG) {
4044                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4045                             (epoch - cinode->epoch > 0))
4046                                 *purge_cache = true;
4047                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4048                                  (epoch - cinode->epoch > 1))
4049                                 *purge_cache = true;
4050                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4051                                  (epoch - cinode->epoch > 1))
4052                                 *purge_cache = true;
4053                         else if (cinode->oplock == 0 &&
4054                                  (epoch - cinode->epoch > 0))
4055                                 *purge_cache = true;
4056                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4057                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4058                             (epoch - cinode->epoch > 0))
4059                                 *purge_cache = true;
4060                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4061                                  (epoch - cinode->epoch > 1))
4062                                 *purge_cache = true;
4063                 }
4064                 cinode->epoch = epoch;
4065         }
4066 }
4067
4068 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4069 static bool
4070 smb2_is_read_op(__u32 oplock)
4071 {
4072         return oplock == SMB2_OPLOCK_LEVEL_II;
4073 }
4074 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4075
4076 static bool
4077 smb21_is_read_op(__u32 oplock)
4078 {
4079         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4080                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4081 }
4082
4083 static __le32
4084 map_oplock_to_lease(u8 oplock)
4085 {
4086         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4087                 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4088         else if (oplock == SMB2_OPLOCK_LEVEL_II)
4089                 return SMB2_LEASE_READ_CACHING_LE;
4090         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4091                 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4092                        SMB2_LEASE_WRITE_CACHING_LE;
4093         return 0;
4094 }
4095
4096 static char *
4097 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4098 {
4099         struct create_lease *buf;
4100
4101         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4102         if (!buf)
4103                 return NULL;
4104
4105         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4106         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4107
4108         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4109                                         (struct create_lease, lcontext));
4110         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4111         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4112                                 (struct create_lease, Name));
4113         buf->ccontext.NameLength = cpu_to_le16(4);
4114         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4115         buf->Name[0] = 'R';
4116         buf->Name[1] = 'q';
4117         buf->Name[2] = 'L';
4118         buf->Name[3] = 's';
4119         return (char *)buf;
4120 }
4121
4122 static char *
4123 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4124 {
4125         struct create_lease_v2 *buf;
4126
4127         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4128         if (!buf)
4129                 return NULL;
4130
4131         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4132         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4133
4134         buf->ccontext.DataOffset = cpu_to_le16(offsetof
4135                                         (struct create_lease_v2, lcontext));
4136         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4137         buf->ccontext.NameOffset = cpu_to_le16(offsetof
4138                                 (struct create_lease_v2, Name));
4139         buf->ccontext.NameLength = cpu_to_le16(4);
4140         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4141         buf->Name[0] = 'R';
4142         buf->Name[1] = 'q';
4143         buf->Name[2] = 'L';
4144         buf->Name[3] = 's';
4145         return (char *)buf;
4146 }
4147
4148 static __u8
4149 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4150 {
4151         struct create_lease *lc = (struct create_lease *)buf;
4152
4153         *epoch = 0; /* not used */
4154         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4155                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4156         return le32_to_cpu(lc->lcontext.LeaseState);
4157 }
4158
4159 static __u8
4160 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4161 {
4162         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4163
4164         *epoch = le16_to_cpu(lc->lcontext.Epoch);
4165         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4166                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4167         if (lease_key)
4168                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4169         return le32_to_cpu(lc->lcontext.LeaseState);
4170 }
4171
4172 static unsigned int
4173 smb2_wp_retry_size(struct inode *inode)
4174 {
4175         return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4176                      SMB2_MAX_BUFFER_SIZE);
4177 }
4178
4179 static bool
4180 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4181 {
4182         return !cfile->invalidHandle;
4183 }
4184
4185 static void
4186 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4187                    struct smb_rqst *old_rq, __le16 cipher_type)
4188 {
4189         struct smb2_hdr *shdr =
4190                         (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4191
4192         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4193         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4194         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4195         tr_hdr->Flags = cpu_to_le16(0x01);
4196         if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4197             (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4198                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4199         else
4200                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4201         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4202 }
4203
4204 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4205                                  int num_rqst, const u8 *sig, u8 **iv,
4206                                  struct aead_request **req, struct sg_table *sgt,
4207                                  unsigned int *num_sgs, size_t *sensitive_size)
4208 {
4209         unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4210         unsigned int iv_size = crypto_aead_ivsize(tfm);
4211         unsigned int len;
4212         u8 *p;
4213
4214         *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4215         if (IS_ERR_VALUE((long)(int)*num_sgs))
4216                 return ERR_PTR(*num_sgs);
4217
4218         len = iv_size;
4219         len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4220         len = ALIGN(len, crypto_tfm_ctx_alignment());
4221         len += req_size;
4222         len = ALIGN(len, __alignof__(struct scatterlist));
4223         len += array_size(*num_sgs, sizeof(struct scatterlist));
4224         *sensitive_size = len;
4225
4226         p = kvzalloc(len, GFP_NOFS);
4227         if (!p)
4228                 return ERR_PTR(-ENOMEM);
4229
4230         *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4231         *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4232                                                 crypto_tfm_ctx_alignment());
4233         sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4234                                                    __alignof__(struct scatterlist));
4235         return p;
4236 }
4237
4238 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4239                                int num_rqst, const u8 *sig, u8 **iv,
4240                                struct aead_request **req, struct scatterlist **sgl,
4241                                size_t *sensitive_size)
4242 {
4243         struct sg_table sgtable = {};
4244         unsigned int skip, num_sgs, i, j;
4245         ssize_t rc;
4246         void *p;
4247
4248         p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4249                                 &num_sgs, sensitive_size);
4250         if (IS_ERR(p))
4251                 return ERR_CAST(p);
4252
4253         sg_init_marker(sgtable.sgl, num_sgs);
4254
4255         /*
4256          * The first rqst has a transform header where the
4257          * first 20 bytes are not part of the encrypted blob.
4258          */
4259         skip = 20;
4260
4261         for (i = 0; i < num_rqst; i++) {
4262                 struct iov_iter *iter = &rqst[i].rq_iter;
4263                 size_t count = iov_iter_count(iter);
4264
4265                 for (j = 0; j < rqst[i].rq_nvec; j++) {
4266                         cifs_sg_set_buf(&sgtable,
4267                                         rqst[i].rq_iov[j].iov_base + skip,
4268                                         rqst[i].rq_iov[j].iov_len - skip);
4269
4270                         /* See the above comment on the 'skip' assignment */
4271                         skip = 0;
4272                 }
4273                 sgtable.orig_nents = sgtable.nents;
4274
4275                 rc = extract_iter_to_sg(iter, count, &sgtable,
4276                                         num_sgs - sgtable.nents, 0);
4277                 iov_iter_revert(iter, rc);
4278                 sgtable.orig_nents = sgtable.nents;
4279         }
4280
4281         cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4282         sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4283         *sgl = sgtable.sgl;
4284         return p;
4285 }
4286
4287 static int
4288 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4289 {
4290         struct TCP_Server_Info *pserver;
4291         struct cifs_ses *ses;
4292         u8 *ses_enc_key;
4293
4294         /* If server is a channel, select the primary channel */
4295         pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4296
4297         spin_lock(&cifs_tcp_ses_lock);
4298         list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4299                 if (ses->Suid == ses_id) {
4300                         spin_lock(&ses->ses_lock);
4301                         ses_enc_key = enc ? ses->smb3encryptionkey :
4302                                 ses->smb3decryptionkey;
4303                         memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4304                         spin_unlock(&ses->ses_lock);
4305                         spin_unlock(&cifs_tcp_ses_lock);
4306                         return 0;
4307                 }
4308         }
4309         spin_unlock(&cifs_tcp_ses_lock);
4310
4311         trace_smb3_ses_not_found(ses_id);
4312
4313         return -EAGAIN;
4314 }
4315 /*
4316  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4317  * iov[0]   - transform header (associate data),
4318  * iov[1-N] - SMB2 header and pages - data to encrypt.
4319  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4320  * untouched.
4321  */
4322 static int
4323 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4324               struct smb_rqst *rqst, int enc)
4325 {
4326         struct smb2_transform_hdr *tr_hdr =
4327                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4328         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4329         int rc = 0;
4330         struct scatterlist *sg;
4331         u8 sign[SMB2_SIGNATURE_SIZE] = {};
4332         u8 key[SMB3_ENC_DEC_KEY_SIZE];
4333         struct aead_request *req;
4334         u8 *iv;
4335         DECLARE_CRYPTO_WAIT(wait);
4336         struct crypto_aead *tfm;
4337         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4338         void *creq;
4339         size_t sensitive_size;
4340
4341         rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4342         if (rc) {
4343                 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4344                          enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4345                 return rc;
4346         }
4347
4348         rc = smb3_crypto_aead_allocate(server);
4349         if (rc) {
4350                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4351                 return rc;
4352         }
4353
4354         tfm = enc ? server->secmech.enc : server->secmech.dec;
4355
4356         if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4357                 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4358                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4359         else
4360                 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4361
4362         if (rc) {
4363                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4364                 return rc;
4365         }
4366
4367         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4368         if (rc) {
4369                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4370                 return rc;
4371         }
4372
4373         creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4374                                  &sensitive_size);
4375         if (IS_ERR(creq))
4376                 return PTR_ERR(creq);
4377
4378         if (!enc) {
4379                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4380                 crypt_len += SMB2_SIGNATURE_SIZE;
4381         }
4382
4383         if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4384             (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4385                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4386         else {
4387                 iv[0] = 3;
4388                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4389         }
4390
4391         aead_request_set_tfm(req, tfm);
4392         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4393         aead_request_set_ad(req, assoc_data_len);
4394
4395         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4396                                   crypto_req_done, &wait);
4397
4398         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4399                                 : crypto_aead_decrypt(req), &wait);
4400
4401         if (!rc && enc)
4402                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4403
4404         kvfree_sensitive(creq, sensitive_size);
4405         return rc;
4406 }
4407
4408 /*
4409  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4410  */
4411 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4412 {
4413         struct folio *folio;
4414
4415         XA_STATE(xas, buffer, 0);
4416
4417         rcu_read_lock();
4418         xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4419                 folio_put(folio);
4420         }
4421         rcu_read_unlock();
4422         xa_destroy(buffer);
4423 }
4424
4425 void
4426 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4427 {
4428         int i;
4429
4430         for (i = 0; i < num_rqst; i++)
4431                 if (!xa_empty(&rqst[i].rq_buffer))
4432                         cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4433 }
4434
4435 /*
4436  * This function will initialize new_rq and encrypt the content.
4437  * The first entry, new_rq[0], only contains a single iov which contains
4438  * a smb2_transform_hdr and is pre-allocated by the caller.
4439  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4440  *
4441  * The end result is an array of smb_rqst structures where the first structure
4442  * only contains a single iov for the transform header which we then can pass
4443  * to crypt_message().
4444  *
4445  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4446  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4447  */
4448 static int
4449 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4450                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4451 {
4452         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4453         struct page *page;
4454         unsigned int orig_len = 0;
4455         int i, j;
4456         int rc = -ENOMEM;
4457
4458         for (i = 1; i < num_rqst; i++) {
4459                 struct smb_rqst *old = &old_rq[i - 1];
4460                 struct smb_rqst *new = &new_rq[i];
4461                 struct xarray *buffer = &new->rq_buffer;
4462                 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4463
4464                 orig_len += smb_rqst_len(server, old);
4465                 new->rq_iov = old->rq_iov;
4466                 new->rq_nvec = old->rq_nvec;
4467
4468                 xa_init(buffer);
4469
4470                 if (size > 0) {
4471                         unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4472
4473                         for (j = 0; j < npages; j++) {
4474                                 void *o;
4475
4476                                 rc = -ENOMEM;
4477                                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4478                                 if (!page)
4479                                         goto err_free;
4480                                 page->index = j;
4481                                 o = xa_store(buffer, j, page, GFP_KERNEL);
4482                                 if (xa_is_err(o)) {
4483                                         rc = xa_err(o);
4484                                         put_page(page);
4485                                         goto err_free;
4486                                 }
4487
4488                                 xa_set_mark(buffer, j, XA_MARK_0);
4489
4490                                 seg = min_t(size_t, size - copied, PAGE_SIZE);
4491                                 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4492                                         rc = -EFAULT;
4493                                         goto err_free;
4494                                 }
4495                                 copied += seg;
4496                         }
4497                         iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4498                                         buffer, 0, size);
4499                         new->rq_iter_size = size;
4500                 }
4501         }
4502
4503         /* fill the 1st iov with a transform header */
4504         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4505
4506         rc = crypt_message(server, num_rqst, new_rq, 1);
4507         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4508         if (rc)
4509                 goto err_free;
4510
4511         return rc;
4512
4513 err_free:
4514         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4515         return rc;
4516 }
4517
4518 static int
4519 smb3_is_transform_hdr(void *buf)
4520 {
4521         struct smb2_transform_hdr *trhdr = buf;
4522
4523         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4524 }
4525
4526 static int
4527 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4528                  unsigned int buf_data_size, struct iov_iter *iter,
4529                  bool is_offloaded)
4530 {
4531         struct kvec iov[2];
4532         struct smb_rqst rqst = {NULL};
4533         size_t iter_size = 0;
4534         int rc;
4535
4536         iov[0].iov_base = buf;
4537         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4538         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4539         iov[1].iov_len = buf_data_size;
4540
4541         rqst.rq_iov = iov;
4542         rqst.rq_nvec = 2;
4543         if (iter) {
4544                 rqst.rq_iter = *iter;
4545                 rqst.rq_iter_size = iov_iter_count(iter);
4546                 iter_size = iov_iter_count(iter);
4547         }
4548
4549         rc = crypt_message(server, 1, &rqst, 0);
4550         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4551
4552         if (rc)
4553                 return rc;
4554
4555         memmove(buf, iov[1].iov_base, buf_data_size);
4556
4557         if (!is_offloaded)
4558                 server->total_read = buf_data_size + iter_size;
4559
4560         return rc;
4561 }
4562
4563 static int
4564 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4565                         unsigned int skip, struct iov_iter *iter)
4566 {
4567         struct page *page;
4568         unsigned long index;
4569
4570         xa_for_each(pages, index, page) {
4571                 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4572
4573                 n = copy_page_to_iter(page, skip, len, iter);
4574                 if (n != len) {
4575                         cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4576                         return -EIO;
4577                 }
4578                 data_size -= n;
4579                 skip = 0;
4580         }
4581
4582         return 0;
4583 }
4584
4585 static int
4586 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4587                  char *buf, unsigned int buf_len, struct xarray *pages,
4588                  unsigned int pages_len, bool is_offloaded)
4589 {
4590         unsigned int data_offset;
4591         unsigned int data_len;
4592         unsigned int cur_off;
4593         unsigned int cur_page_idx;
4594         unsigned int pad_len;
4595         struct cifs_readdata *rdata = mid->callback_data;
4596         struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4597         int length;
4598         bool use_rdma_mr = false;
4599
4600         if (shdr->Command != SMB2_READ) {
4601                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4602                 return -EOPNOTSUPP;
4603         }
4604
4605         if (server->ops->is_session_expired &&
4606             server->ops->is_session_expired(buf)) {
4607                 if (!is_offloaded)
4608                         cifs_reconnect(server, true);
4609                 return -1;
4610         }
4611
4612         if (server->ops->is_status_pending &&
4613                         server->ops->is_status_pending(buf, server))
4614                 return -1;
4615
4616         /* set up first two iov to get credits */
4617         rdata->iov[0].iov_base = buf;
4618         rdata->iov[0].iov_len = 0;
4619         rdata->iov[1].iov_base = buf;
4620         rdata->iov[1].iov_len =
4621                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4622         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4623                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4624         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4625                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4626
4627         rdata->result = server->ops->map_error(buf, true);
4628         if (rdata->result != 0) {
4629                 cifs_dbg(FYI, "%s: server returned error %d\n",
4630                          __func__, rdata->result);
4631                 /* normal error on read response */
4632                 if (is_offloaded)
4633                         mid->mid_state = MID_RESPONSE_RECEIVED;
4634                 else
4635                         dequeue_mid(mid, false);
4636                 return 0;
4637         }
4638
4639         data_offset = server->ops->read_data_offset(buf);
4640 #ifdef CONFIG_CIFS_SMB_DIRECT
4641         use_rdma_mr = rdata->mr;
4642 #endif
4643         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4644
4645         if (data_offset < server->vals->read_rsp_size) {
4646                 /*
4647                  * win2k8 sometimes sends an offset of 0 when the read
4648                  * is beyond the EOF. Treat it as if the data starts just after
4649                  * the header.
4650                  */
4651                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4652                          __func__, data_offset);
4653                 data_offset = server->vals->read_rsp_size;
4654         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4655                 /* data_offset is beyond the end of smallbuf */
4656                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4657                          __func__, data_offset);
4658                 rdata->result = -EIO;
4659                 if (is_offloaded)
4660                         mid->mid_state = MID_RESPONSE_MALFORMED;
4661                 else
4662                         dequeue_mid(mid, rdata->result);
4663                 return 0;
4664         }
4665
4666         pad_len = data_offset - server->vals->read_rsp_size;
4667
4668         if (buf_len <= data_offset) {
4669                 /* read response payload is in pages */
4670                 cur_page_idx = pad_len / PAGE_SIZE;
4671                 cur_off = pad_len % PAGE_SIZE;
4672
4673                 if (cur_page_idx != 0) {
4674                         /* data offset is beyond the 1st page of response */
4675                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4676                                  __func__, data_offset);
4677                         rdata->result = -EIO;
4678                         if (is_offloaded)
4679                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4680                         else
4681                                 dequeue_mid(mid, rdata->result);
4682                         return 0;
4683                 }
4684
4685                 if (data_len > pages_len - pad_len) {
4686                         /* data_len is corrupt -- discard frame */
4687                         rdata->result = -EIO;
4688                         if (is_offloaded)
4689                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4690                         else
4691                                 dequeue_mid(mid, rdata->result);
4692                         return 0;
4693                 }
4694
4695                 /* Copy the data to the output I/O iterator. */
4696                 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4697                                                         cur_off, &rdata->iter);
4698                 if (rdata->result != 0) {
4699                         if (is_offloaded)
4700                                 mid->mid_state = MID_RESPONSE_MALFORMED;
4701                         else
4702                                 dequeue_mid(mid, rdata->result);
4703                         return 0;
4704                 }
4705                 rdata->got_bytes = pages_len;
4706
4707         } else if (buf_len >= data_offset + data_len) {
4708                 /* read response payload is in buf */
4709                 WARN_ONCE(pages && !xa_empty(pages),
4710                           "read data can be either in buf or in pages");
4711                 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4712                 if (length < 0)
4713                         return length;
4714                 rdata->got_bytes = data_len;
4715         } else {
4716                 /* read response payload cannot be in both buf and pages */
4717                 WARN_ONCE(1, "buf can not contain only a part of read data");
4718                 rdata->result = -EIO;
4719                 if (is_offloaded)
4720                         mid->mid_state = MID_RESPONSE_MALFORMED;
4721                 else
4722                         dequeue_mid(mid, rdata->result);
4723                 return 0;
4724         }
4725
4726         if (is_offloaded)
4727                 mid->mid_state = MID_RESPONSE_RECEIVED;
4728         else
4729                 dequeue_mid(mid, false);
4730         return 0;
4731 }
4732
4733 struct smb2_decrypt_work {
4734         struct work_struct decrypt;
4735         struct TCP_Server_Info *server;
4736         struct xarray buffer;
4737         char *buf;
4738         unsigned int len;
4739 };
4740
4741
4742 static void smb2_decrypt_offload(struct work_struct *work)
4743 {
4744         struct smb2_decrypt_work *dw = container_of(work,
4745                                 struct smb2_decrypt_work, decrypt);
4746         int rc;
4747         struct mid_q_entry *mid;
4748         struct iov_iter iter;
4749
4750         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4751         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4752                               &iter, true);
4753         if (rc) {
4754                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4755                 goto free_pages;
4756         }
4757
4758         dw->server->lstrp = jiffies;
4759         mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4760         if (mid == NULL)
4761                 cifs_dbg(FYI, "mid not found\n");
4762         else {
4763                 mid->decrypted = true;
4764                 rc = handle_read_data(dw->server, mid, dw->buf,
4765                                       dw->server->vals->read_rsp_size,
4766                                       &dw->buffer, dw->len,
4767                                       true);
4768                 if (rc >= 0) {
4769 #ifdef CONFIG_CIFS_STATS2
4770                         mid->when_received = jiffies;
4771 #endif
4772                         if (dw->server->ops->is_network_name_deleted)
4773                                 dw->server->ops->is_network_name_deleted(dw->buf,
4774                                                                          dw->server);
4775
4776                         mid->callback(mid);
4777                 } else {
4778                         spin_lock(&dw->server->srv_lock);
4779                         if (dw->server->tcpStatus == CifsNeedReconnect) {
4780                                 spin_lock(&dw->server->mid_lock);
4781                                 mid->mid_state = MID_RETRY_NEEDED;
4782                                 spin_unlock(&dw->server->mid_lock);
4783                                 spin_unlock(&dw->server->srv_lock);
4784                                 mid->callback(mid);
4785                         } else {
4786                                 spin_lock(&dw->server->mid_lock);
4787                                 mid->mid_state = MID_REQUEST_SUBMITTED;
4788                                 mid->mid_flags &= ~(MID_DELETED);
4789                                 list_add_tail(&mid->qhead,
4790                                         &dw->server->pending_mid_q);
4791                                 spin_unlock(&dw->server->mid_lock);
4792                                 spin_unlock(&dw->server->srv_lock);
4793                         }
4794                 }
4795                 release_mid(mid);
4796         }
4797
4798 free_pages:
4799         cifs_clear_xarray_buffer(&dw->buffer);
4800         cifs_small_buf_release(dw->buf);
4801         kfree(dw);
4802 }
4803
4804
4805 static int
4806 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4807                        int *num_mids)
4808 {
4809         struct page *page;
4810         char *buf = server->smallbuf;
4811         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4812         struct iov_iter iter;
4813         unsigned int len, npages;
4814         unsigned int buflen = server->pdu_size;
4815         int rc;
4816         int i = 0;
4817         struct smb2_decrypt_work *dw;
4818
4819         dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4820         if (!dw)
4821                 return -ENOMEM;
4822         xa_init(&dw->buffer);
4823         INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4824         dw->server = server;
4825
4826         *num_mids = 1;
4827         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4828                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4829
4830         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4831         if (rc < 0)
4832                 goto free_dw;
4833         server->total_read += rc;
4834
4835         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4836                 server->vals->read_rsp_size;
4837         dw->len = len;
4838         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4839
4840         rc = -ENOMEM;
4841         for (; i < npages; i++) {
4842                 void *old;
4843
4844                 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4845                 if (!page)
4846                         goto discard_data;
4847                 page->index = i;
4848                 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4849                 if (xa_is_err(old)) {
4850                         rc = xa_err(old);
4851                         put_page(page);
4852                         goto discard_data;
4853                 }
4854                 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4855         }
4856
4857         iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4858
4859         /* Read the data into the buffer and clear excess bufferage. */
4860         rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4861         if (rc < 0)
4862                 goto discard_data;
4863
4864         server->total_read += rc;
4865         if (rc < npages * PAGE_SIZE)
4866                 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4867         iov_iter_revert(&iter, npages * PAGE_SIZE);
4868         iov_iter_truncate(&iter, dw->len);
4869
4870         rc = cifs_discard_remaining_data(server);
4871         if (rc)
4872                 goto free_pages;
4873
4874         /*
4875          * For large reads, offload to different thread for better performance,
4876          * use more cores decrypting which can be expensive
4877          */
4878
4879         if ((server->min_offload) && (server->in_flight > 1) &&
4880             (server->pdu_size >= server->min_offload)) {
4881                 dw->buf = server->smallbuf;
4882                 server->smallbuf = (char *)cifs_small_buf_get();
4883
4884                 queue_work(decrypt_wq, &dw->decrypt);
4885                 *num_mids = 0; /* worker thread takes care of finding mid */
4886                 return -1;
4887         }
4888
4889         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4890                               &iter, false);
4891         if (rc)
4892                 goto free_pages;
4893
4894         *mid = smb2_find_mid(server, buf);
4895         if (*mid == NULL) {
4896                 cifs_dbg(FYI, "mid not found\n");
4897         } else {
4898                 cifs_dbg(FYI, "mid found\n");
4899                 (*mid)->decrypted = true;
4900                 rc = handle_read_data(server, *mid, buf,
4901                                       server->vals->read_rsp_size,
4902                                       &dw->buffer, dw->len, false);
4903                 if (rc >= 0) {
4904                         if (server->ops->is_network_name_deleted) {
4905                                 server->ops->is_network_name_deleted(buf,
4906                                                                 server);
4907                         }
4908                 }
4909         }
4910
4911 free_pages:
4912         cifs_clear_xarray_buffer(&dw->buffer);
4913 free_dw:
4914         kfree(dw);
4915         return rc;
4916 discard_data:
4917         cifs_discard_remaining_data(server);
4918         goto free_pages;
4919 }
4920
4921 static int
4922 receive_encrypted_standard(struct TCP_Server_Info *server,
4923                            struct mid_q_entry **mids, char **bufs,
4924                            int *num_mids)
4925 {
4926         int ret, length;
4927         char *buf = server->smallbuf;
4928         struct smb2_hdr *shdr;
4929         unsigned int pdu_length = server->pdu_size;
4930         unsigned int buf_size;
4931         struct mid_q_entry *mid_entry;
4932         int next_is_large;
4933         char *next_buffer = NULL;
4934
4935         *num_mids = 0;
4936
4937         /* switch to large buffer if too big for a small one */
4938         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4939                 server->large_buf = true;
4940                 memcpy(server->bigbuf, buf, server->total_read);
4941                 buf = server->bigbuf;
4942         }
4943
4944         /* now read the rest */
4945         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4946                                 pdu_length - HEADER_SIZE(server) + 1);
4947         if (length < 0)
4948                 return length;
4949         server->total_read += length;
4950
4951         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4952         length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4953         if (length)
4954                 return length;
4955
4956         next_is_large = server->large_buf;
4957 one_more:
4958         shdr = (struct smb2_hdr *)buf;
4959         if (shdr->NextCommand) {
4960                 if (next_is_large)
4961                         next_buffer = (char *)cifs_buf_get();
4962                 else
4963                         next_buffer = (char *)cifs_small_buf_get();
4964                 memcpy(next_buffer,
4965                        buf + le32_to_cpu(shdr->NextCommand),
4966                        pdu_length - le32_to_cpu(shdr->NextCommand));
4967         }
4968
4969         mid_entry = smb2_find_mid(server, buf);
4970         if (mid_entry == NULL)
4971                 cifs_dbg(FYI, "mid not found\n");
4972         else {
4973                 cifs_dbg(FYI, "mid found\n");
4974                 mid_entry->decrypted = true;
4975                 mid_entry->resp_buf_size = server->pdu_size;
4976         }
4977
4978         if (*num_mids >= MAX_COMPOUND) {
4979                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4980                 return -1;
4981         }
4982         bufs[*num_mids] = buf;
4983         mids[(*num_mids)++] = mid_entry;
4984
4985         if (mid_entry && mid_entry->handle)
4986                 ret = mid_entry->handle(server, mid_entry);
4987         else
4988                 ret = cifs_handle_standard(server, mid_entry);
4989
4990         if (ret == 0 && shdr->NextCommand) {
4991                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4992                 server->large_buf = next_is_large;
4993                 if (next_is_large)
4994                         server->bigbuf = buf = next_buffer;
4995                 else
4996                         server->smallbuf = buf = next_buffer;
4997                 goto one_more;
4998         } else if (ret != 0) {
4999                 /*
5000                  * ret != 0 here means that we didn't get to handle_mid() thus
5001                  * server->smallbuf and server->bigbuf are still valid. We need
5002                  * to free next_buffer because it is not going to be used
5003                  * anywhere.
5004                  */
5005                 if (next_is_large)
5006                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5007                 else
5008                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5009         }
5010
5011         return ret;
5012 }
5013
5014 static int
5015 smb3_receive_transform(struct TCP_Server_Info *server,
5016                        struct mid_q_entry **mids, char **bufs, int *num_mids)
5017 {
5018         char *buf = server->smallbuf;
5019         unsigned int pdu_length = server->pdu_size;
5020         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5021         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5022
5023         if (pdu_length < sizeof(struct smb2_transform_hdr) +
5024                                                 sizeof(struct smb2_hdr)) {
5025                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5026                          pdu_length);
5027                 cifs_reconnect(server, true);
5028                 return -ECONNABORTED;
5029         }
5030
5031         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5032                 cifs_server_dbg(VFS, "Transform message is broken\n");
5033                 cifs_reconnect(server, true);
5034                 return -ECONNABORTED;
5035         }
5036
5037         /* TODO: add support for compounds containing READ. */
5038         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5039                 return receive_encrypted_read(server, &mids[0], num_mids);
5040         }
5041
5042         return receive_encrypted_standard(server, mids, bufs, num_mids);
5043 }
5044
5045 int
5046 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5047 {
5048         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5049
5050         return handle_read_data(server, mid, buf, server->pdu_size,
5051                                 NULL, 0, false);
5052 }
5053
5054 static int
5055 smb2_next_header(char *buf)
5056 {
5057         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5058         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5059
5060         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5061                 return sizeof(struct smb2_transform_hdr) +
5062                   le32_to_cpu(t_hdr->OriginalMessageSize);
5063
5064         return le32_to_cpu(hdr->NextCommand);
5065 }
5066
5067 static int
5068 smb2_make_node(unsigned int xid, struct inode *inode,
5069                struct dentry *dentry, struct cifs_tcon *tcon,
5070                const char *full_path, umode_t mode, dev_t dev)
5071 {
5072         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5073         int rc = -EPERM;
5074         struct cifs_open_info_data buf = {};
5075         struct cifs_io_parms io_parms = {0};
5076         __u32 oplock = 0;
5077         struct cifs_fid fid;
5078         struct cifs_open_parms oparms;
5079         unsigned int bytes_written;
5080         struct win_dev *pdev;
5081         struct kvec iov[2];
5082
5083         /*
5084          * Check if mounted with mount parm 'sfu' mount parm.
5085          * SFU emulation should work with all servers, but only
5086          * supports block and char device (no socket & fifo),
5087          * and was used by default in earlier versions of Windows
5088          */
5089         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5090                 return rc;
5091
5092         /*
5093          * TODO: Add ability to create instead via reparse point. Windows (e.g.
5094          * their current NFS server) uses this approach to expose special files
5095          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5096          */
5097
5098         if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5099                 return rc;
5100
5101         cifs_dbg(FYI, "sfu compat create special file\n");
5102
5103         oparms = (struct cifs_open_parms) {
5104                 .tcon = tcon,
5105                 .cifs_sb = cifs_sb,
5106                 .desired_access = GENERIC_WRITE,
5107                 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5108                                                       CREATE_OPTION_SPECIAL),
5109                 .disposition = FILE_CREATE,
5110                 .path = full_path,
5111                 .fid = &fid,
5112         };
5113
5114         if (tcon->ses->server->oplocks)
5115                 oplock = REQ_OPLOCK;
5116         else
5117                 oplock = 0;
5118         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5119         if (rc)
5120                 return rc;
5121
5122         /*
5123          * BB Do not bother to decode buf since no local inode yet to put
5124          * timestamps in, but we can reuse it safely.
5125          */
5126
5127         pdev = (struct win_dev *)&buf.fi;
5128         io_parms.pid = current->tgid;
5129         io_parms.tcon = tcon;
5130         io_parms.offset = 0;
5131         io_parms.length = sizeof(struct win_dev);
5132         iov[1].iov_base = &buf.fi;
5133         iov[1].iov_len = sizeof(struct win_dev);
5134         if (S_ISCHR(mode)) {
5135                 memcpy(pdev->type, "IntxCHR", 8);
5136                 pdev->major = cpu_to_le64(MAJOR(dev));
5137                 pdev->minor = cpu_to_le64(MINOR(dev));
5138                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5139                                                         &bytes_written, iov, 1);
5140         } else if (S_ISBLK(mode)) {
5141                 memcpy(pdev->type, "IntxBLK", 8);
5142                 pdev->major = cpu_to_le64(MAJOR(dev));
5143                 pdev->minor = cpu_to_le64(MINOR(dev));
5144                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5145                                                         &bytes_written, iov, 1);
5146         } else if (S_ISFIFO(mode)) {
5147                 memcpy(pdev->type, "LnxFIFO", 8);
5148                 pdev->major = 0;
5149                 pdev->minor = 0;
5150                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5151                                                         &bytes_written, iov, 1);
5152         }
5153         tcon->ses->server->ops->close(xid, tcon, &fid);
5154         d_drop(dentry);
5155
5156         /* FIXME: add code here to set EAs */
5157
5158         cifs_free_open_info(&buf);
5159         return rc;
5160 }
5161
5162 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5163 struct smb_version_operations smb20_operations = {
5164         .compare_fids = smb2_compare_fids,
5165         .setup_request = smb2_setup_request,
5166         .setup_async_request = smb2_setup_async_request,
5167         .check_receive = smb2_check_receive,
5168         .add_credits = smb2_add_credits,
5169         .set_credits = smb2_set_credits,
5170         .get_credits_field = smb2_get_credits_field,
5171         .get_credits = smb2_get_credits,
5172         .wait_mtu_credits = cifs_wait_mtu_credits,
5173         .get_next_mid = smb2_get_next_mid,
5174         .revert_current_mid = smb2_revert_current_mid,
5175         .read_data_offset = smb2_read_data_offset,
5176         .read_data_length = smb2_read_data_length,
5177         .map_error = map_smb2_to_linux_error,
5178         .find_mid = smb2_find_mid,
5179         .check_message = smb2_check_message,
5180         .dump_detail = smb2_dump_detail,
5181         .clear_stats = smb2_clear_stats,
5182         .print_stats = smb2_print_stats,
5183         .is_oplock_break = smb2_is_valid_oplock_break,
5184         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5185         .downgrade_oplock = smb2_downgrade_oplock,
5186         .need_neg = smb2_need_neg,
5187         .negotiate = smb2_negotiate,
5188         .negotiate_wsize = smb2_negotiate_wsize,
5189         .negotiate_rsize = smb2_negotiate_rsize,
5190         .sess_setup = SMB2_sess_setup,
5191         .logoff = SMB2_logoff,
5192         .tree_connect = SMB2_tcon,
5193         .tree_disconnect = SMB2_tdis,
5194         .qfs_tcon = smb2_qfs_tcon,
5195         .is_path_accessible = smb2_is_path_accessible,
5196         .can_echo = smb2_can_echo,
5197         .echo = SMB2_echo,
5198         .query_path_info = smb2_query_path_info,
5199         .query_reparse_point = smb2_query_reparse_point,
5200         .get_srv_inum = smb2_get_srv_inum,
5201         .query_file_info = smb2_query_file_info,
5202         .set_path_size = smb2_set_path_size,
5203         .set_file_size = smb2_set_file_size,
5204         .set_file_info = smb2_set_file_info,
5205         .set_compression = smb2_set_compression,
5206         .mkdir = smb2_mkdir,
5207         .mkdir_setinfo = smb2_mkdir_setinfo,
5208         .rmdir = smb2_rmdir,
5209         .unlink = smb2_unlink,
5210         .rename = smb2_rename_path,
5211         .create_hardlink = smb2_create_hardlink,
5212         .query_symlink = smb2_query_symlink,
5213         .query_mf_symlink = smb3_query_mf_symlink,
5214         .create_mf_symlink = smb3_create_mf_symlink,
5215         .open = smb2_open_file,
5216         .set_fid = smb2_set_fid,
5217         .close = smb2_close_file,
5218         .flush = smb2_flush_file,
5219         .async_readv = smb2_async_readv,
5220         .async_writev = smb2_async_writev,
5221         .sync_read = smb2_sync_read,
5222         .sync_write = smb2_sync_write,
5223         .query_dir_first = smb2_query_dir_first,
5224         .query_dir_next = smb2_query_dir_next,
5225         .close_dir = smb2_close_dir,
5226         .calc_smb_size = smb2_calc_size,
5227         .is_status_pending = smb2_is_status_pending,
5228         .is_session_expired = smb2_is_session_expired,
5229         .oplock_response = smb2_oplock_response,
5230         .queryfs = smb2_queryfs,
5231         .mand_lock = smb2_mand_lock,
5232         .mand_unlock_range = smb2_unlock_range,
5233         .push_mand_locks = smb2_push_mandatory_locks,
5234         .get_lease_key = smb2_get_lease_key,
5235         .set_lease_key = smb2_set_lease_key,
5236         .new_lease_key = smb2_new_lease_key,
5237         .calc_signature = smb2_calc_signature,
5238         .is_read_op = smb2_is_read_op,
5239         .set_oplock_level = smb2_set_oplock_level,
5240         .create_lease_buf = smb2_create_lease_buf,
5241         .parse_lease_buf = smb2_parse_lease_buf,
5242         .copychunk_range = smb2_copychunk_range,
5243         .wp_retry_size = smb2_wp_retry_size,
5244         .dir_needs_close = smb2_dir_needs_close,
5245         .get_dfs_refer = smb2_get_dfs_refer,
5246         .select_sectype = smb2_select_sectype,
5247 #ifdef CONFIG_CIFS_XATTR
5248         .query_all_EAs = smb2_query_eas,
5249         .set_EA = smb2_set_ea,
5250 #endif /* CIFS_XATTR */
5251         .get_acl = get_smb2_acl,
5252         .get_acl_by_fid = get_smb2_acl_by_fid,
5253         .set_acl = set_smb2_acl,
5254         .next_header = smb2_next_header,
5255         .ioctl_query_info = smb2_ioctl_query_info,
5256         .make_node = smb2_make_node,
5257         .fiemap = smb3_fiemap,
5258         .llseek = smb3_llseek,
5259         .is_status_io_timeout = smb2_is_status_io_timeout,
5260         .is_network_name_deleted = smb2_is_network_name_deleted,
5261 };
5262 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5263
5264 struct smb_version_operations smb21_operations = {
5265         .compare_fids = smb2_compare_fids,
5266         .setup_request = smb2_setup_request,
5267         .setup_async_request = smb2_setup_async_request,
5268         .check_receive = smb2_check_receive,
5269         .add_credits = smb2_add_credits,
5270         .set_credits = smb2_set_credits,
5271         .get_credits_field = smb2_get_credits_field,
5272         .get_credits = smb2_get_credits,
5273         .wait_mtu_credits = smb2_wait_mtu_credits,
5274         .adjust_credits = smb2_adjust_credits,
5275         .get_next_mid = smb2_get_next_mid,
5276         .revert_current_mid = smb2_revert_current_mid,
5277         .read_data_offset = smb2_read_data_offset,
5278         .read_data_length = smb2_read_data_length,
5279         .map_error = map_smb2_to_linux_error,
5280         .find_mid = smb2_find_mid,
5281         .check_message = smb2_check_message,
5282         .dump_detail = smb2_dump_detail,
5283         .clear_stats = smb2_clear_stats,
5284         .print_stats = smb2_print_stats,
5285         .is_oplock_break = smb2_is_valid_oplock_break,
5286         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5287         .downgrade_oplock = smb2_downgrade_oplock,
5288         .need_neg = smb2_need_neg,
5289         .negotiate = smb2_negotiate,
5290         .negotiate_wsize = smb2_negotiate_wsize,
5291         .negotiate_rsize = smb2_negotiate_rsize,
5292         .sess_setup = SMB2_sess_setup,
5293         .logoff = SMB2_logoff,
5294         .tree_connect = SMB2_tcon,
5295         .tree_disconnect = SMB2_tdis,
5296         .qfs_tcon = smb2_qfs_tcon,
5297         .is_path_accessible = smb2_is_path_accessible,
5298         .can_echo = smb2_can_echo,
5299         .echo = SMB2_echo,
5300         .query_path_info = smb2_query_path_info,
5301         .query_reparse_point = smb2_query_reparse_point,
5302         .get_srv_inum = smb2_get_srv_inum,
5303         .query_file_info = smb2_query_file_info,
5304         .set_path_size = smb2_set_path_size,
5305         .set_file_size = smb2_set_file_size,
5306         .set_file_info = smb2_set_file_info,
5307         .set_compression = smb2_set_compression,
5308         .mkdir = smb2_mkdir,
5309         .mkdir_setinfo = smb2_mkdir_setinfo,
5310         .rmdir = smb2_rmdir,
5311         .unlink = smb2_unlink,
5312         .rename = smb2_rename_path,
5313         .create_hardlink = smb2_create_hardlink,
5314         .query_symlink = smb2_query_symlink,
5315         .query_mf_symlink = smb3_query_mf_symlink,
5316         .create_mf_symlink = smb3_create_mf_symlink,
5317         .open = smb2_open_file,
5318         .set_fid = smb2_set_fid,
5319         .close = smb2_close_file,
5320         .flush = smb2_flush_file,
5321         .async_readv = smb2_async_readv,
5322         .async_writev = smb2_async_writev,
5323         .sync_read = smb2_sync_read,
5324         .sync_write = smb2_sync_write,
5325         .query_dir_first = smb2_query_dir_first,
5326         .query_dir_next = smb2_query_dir_next,
5327         .close_dir = smb2_close_dir,
5328         .calc_smb_size = smb2_calc_size,
5329         .is_status_pending = smb2_is_status_pending,
5330         .is_session_expired = smb2_is_session_expired,
5331         .oplock_response = smb2_oplock_response,
5332         .queryfs = smb2_queryfs,
5333         .mand_lock = smb2_mand_lock,
5334         .mand_unlock_range = smb2_unlock_range,
5335         .push_mand_locks = smb2_push_mandatory_locks,
5336         .get_lease_key = smb2_get_lease_key,
5337         .set_lease_key = smb2_set_lease_key,
5338         .new_lease_key = smb2_new_lease_key,
5339         .calc_signature = smb2_calc_signature,
5340         .is_read_op = smb21_is_read_op,
5341         .set_oplock_level = smb21_set_oplock_level,
5342         .create_lease_buf = smb2_create_lease_buf,
5343         .parse_lease_buf = smb2_parse_lease_buf,
5344         .copychunk_range = smb2_copychunk_range,
5345         .wp_retry_size = smb2_wp_retry_size,
5346         .dir_needs_close = smb2_dir_needs_close,
5347         .enum_snapshots = smb3_enum_snapshots,
5348         .notify = smb3_notify,
5349         .get_dfs_refer = smb2_get_dfs_refer,
5350         .select_sectype = smb2_select_sectype,
5351 #ifdef CONFIG_CIFS_XATTR
5352         .query_all_EAs = smb2_query_eas,
5353         .set_EA = smb2_set_ea,
5354 #endif /* CIFS_XATTR */
5355         .get_acl = get_smb2_acl,
5356         .get_acl_by_fid = get_smb2_acl_by_fid,
5357         .set_acl = set_smb2_acl,
5358         .next_header = smb2_next_header,
5359         .ioctl_query_info = smb2_ioctl_query_info,
5360         .make_node = smb2_make_node,
5361         .fiemap = smb3_fiemap,
5362         .llseek = smb3_llseek,
5363         .is_status_io_timeout = smb2_is_status_io_timeout,
5364         .is_network_name_deleted = smb2_is_network_name_deleted,
5365 };
5366
5367 struct smb_version_operations smb30_operations = {
5368         .compare_fids = smb2_compare_fids,
5369         .setup_request = smb2_setup_request,
5370         .setup_async_request = smb2_setup_async_request,
5371         .check_receive = smb2_check_receive,
5372         .add_credits = smb2_add_credits,
5373         .set_credits = smb2_set_credits,
5374         .get_credits_field = smb2_get_credits_field,
5375         .get_credits = smb2_get_credits,
5376         .wait_mtu_credits = smb2_wait_mtu_credits,
5377         .adjust_credits = smb2_adjust_credits,
5378         .get_next_mid = smb2_get_next_mid,
5379         .revert_current_mid = smb2_revert_current_mid,
5380         .read_data_offset = smb2_read_data_offset,
5381         .read_data_length = smb2_read_data_length,
5382         .map_error = map_smb2_to_linux_error,
5383         .find_mid = smb2_find_mid,
5384         .check_message = smb2_check_message,
5385         .dump_detail = smb2_dump_detail,
5386         .clear_stats = smb2_clear_stats,
5387         .print_stats = smb2_print_stats,
5388         .dump_share_caps = smb2_dump_share_caps,
5389         .is_oplock_break = smb2_is_valid_oplock_break,
5390         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5391         .downgrade_oplock = smb3_downgrade_oplock,
5392         .need_neg = smb2_need_neg,
5393         .negotiate = smb2_negotiate,
5394         .negotiate_wsize = smb3_negotiate_wsize,
5395         .negotiate_rsize = smb3_negotiate_rsize,
5396         .sess_setup = SMB2_sess_setup,
5397         .logoff = SMB2_logoff,
5398         .tree_connect = SMB2_tcon,
5399         .tree_disconnect = SMB2_tdis,
5400         .qfs_tcon = smb3_qfs_tcon,
5401         .is_path_accessible = smb2_is_path_accessible,
5402         .can_echo = smb2_can_echo,
5403         .echo = SMB2_echo,
5404         .query_path_info = smb2_query_path_info,
5405         /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5406         .query_reparse_point = smb2_query_reparse_point,
5407         .get_srv_inum = smb2_get_srv_inum,
5408         .query_file_info = smb2_query_file_info,
5409         .set_path_size = smb2_set_path_size,
5410         .set_file_size = smb2_set_file_size,
5411         .set_file_info = smb2_set_file_info,
5412         .set_compression = smb2_set_compression,
5413         .mkdir = smb2_mkdir,
5414         .mkdir_setinfo = smb2_mkdir_setinfo,
5415         .rmdir = smb2_rmdir,
5416         .unlink = smb2_unlink,
5417         .rename = smb2_rename_path,
5418         .create_hardlink = smb2_create_hardlink,
5419         .query_symlink = smb2_query_symlink,
5420         .query_mf_symlink = smb3_query_mf_symlink,
5421         .create_mf_symlink = smb3_create_mf_symlink,
5422         .open = smb2_open_file,
5423         .set_fid = smb2_set_fid,
5424         .close = smb2_close_file,
5425         .close_getattr = smb2_close_getattr,
5426         .flush = smb2_flush_file,
5427         .async_readv = smb2_async_readv,
5428         .async_writev = smb2_async_writev,
5429         .sync_read = smb2_sync_read,
5430         .sync_write = smb2_sync_write,
5431         .query_dir_first = smb2_query_dir_first,
5432         .query_dir_next = smb2_query_dir_next,
5433         .close_dir = smb2_close_dir,
5434         .calc_smb_size = smb2_calc_size,
5435         .is_status_pending = smb2_is_status_pending,
5436         .is_session_expired = smb2_is_session_expired,
5437         .oplock_response = smb2_oplock_response,
5438         .queryfs = smb2_queryfs,
5439         .mand_lock = smb2_mand_lock,
5440         .mand_unlock_range = smb2_unlock_range,
5441         .push_mand_locks = smb2_push_mandatory_locks,
5442         .get_lease_key = smb2_get_lease_key,
5443         .set_lease_key = smb2_set_lease_key,
5444         .new_lease_key = smb2_new_lease_key,
5445         .generate_signingkey = generate_smb30signingkey,
5446         .calc_signature = smb3_calc_signature,
5447         .set_integrity  = smb3_set_integrity,
5448         .is_read_op = smb21_is_read_op,
5449         .set_oplock_level = smb3_set_oplock_level,
5450         .create_lease_buf = smb3_create_lease_buf,
5451         .parse_lease_buf = smb3_parse_lease_buf,
5452         .copychunk_range = smb2_copychunk_range,
5453         .duplicate_extents = smb2_duplicate_extents,
5454         .validate_negotiate = smb3_validate_negotiate,
5455         .wp_retry_size = smb2_wp_retry_size,
5456         .dir_needs_close = smb2_dir_needs_close,
5457         .fallocate = smb3_fallocate,
5458         .enum_snapshots = smb3_enum_snapshots,
5459         .notify = smb3_notify,
5460         .init_transform_rq = smb3_init_transform_rq,
5461         .is_transform_hdr = smb3_is_transform_hdr,
5462         .receive_transform = smb3_receive_transform,
5463         .get_dfs_refer = smb2_get_dfs_refer,
5464         .select_sectype = smb2_select_sectype,
5465 #ifdef CONFIG_CIFS_XATTR
5466         .query_all_EAs = smb2_query_eas,
5467         .set_EA = smb2_set_ea,
5468 #endif /* CIFS_XATTR */
5469         .get_acl = get_smb2_acl,
5470         .get_acl_by_fid = get_smb2_acl_by_fid,
5471         .set_acl = set_smb2_acl,
5472         .next_header = smb2_next_header,
5473         .ioctl_query_info = smb2_ioctl_query_info,
5474         .make_node = smb2_make_node,
5475         .fiemap = smb3_fiemap,
5476         .llseek = smb3_llseek,
5477         .is_status_io_timeout = smb2_is_status_io_timeout,
5478         .is_network_name_deleted = smb2_is_network_name_deleted,
5479 };
5480
5481 struct smb_version_operations smb311_operations = {
5482         .compare_fids = smb2_compare_fids,
5483         .setup_request = smb2_setup_request,
5484         .setup_async_request = smb2_setup_async_request,
5485         .check_receive = smb2_check_receive,
5486         .add_credits = smb2_add_credits,
5487         .set_credits = smb2_set_credits,
5488         .get_credits_field = smb2_get_credits_field,
5489         .get_credits = smb2_get_credits,
5490         .wait_mtu_credits = smb2_wait_mtu_credits,
5491         .adjust_credits = smb2_adjust_credits,
5492         .get_next_mid = smb2_get_next_mid,
5493         .revert_current_mid = smb2_revert_current_mid,
5494         .read_data_offset = smb2_read_data_offset,
5495         .read_data_length = smb2_read_data_length,
5496         .map_error = map_smb2_to_linux_error,
5497         .find_mid = smb2_find_mid,
5498         .check_message = smb2_check_message,
5499         .dump_detail = smb2_dump_detail,
5500         .clear_stats = smb2_clear_stats,
5501         .print_stats = smb2_print_stats,
5502         .dump_share_caps = smb2_dump_share_caps,
5503         .is_oplock_break = smb2_is_valid_oplock_break,
5504         .handle_cancelled_mid = smb2_handle_cancelled_mid,
5505         .downgrade_oplock = smb3_downgrade_oplock,
5506         .need_neg = smb2_need_neg,
5507         .negotiate = smb2_negotiate,
5508         .negotiate_wsize = smb3_negotiate_wsize,
5509         .negotiate_rsize = smb3_negotiate_rsize,
5510         .sess_setup = SMB2_sess_setup,
5511         .logoff = SMB2_logoff,
5512         .tree_connect = SMB2_tcon,
5513         .tree_disconnect = SMB2_tdis,
5514         .qfs_tcon = smb3_qfs_tcon,
5515         .is_path_accessible = smb2_is_path_accessible,
5516         .can_echo = smb2_can_echo,
5517         .echo = SMB2_echo,
5518         .query_path_info = smb2_query_path_info,
5519         .query_reparse_point = smb2_query_reparse_point,
5520         .get_srv_inum = smb2_get_srv_inum,
5521         .query_file_info = smb2_query_file_info,
5522         .set_path_size = smb2_set_path_size,
5523         .set_file_size = smb2_set_file_size,
5524         .set_file_info = smb2_set_file_info,
5525         .set_compression = smb2_set_compression,
5526         .mkdir = smb2_mkdir,
5527         .mkdir_setinfo = smb2_mkdir_setinfo,
5528         .posix_mkdir = smb311_posix_mkdir,
5529         .rmdir = smb2_rmdir,
5530         .unlink = smb2_unlink,
5531         .rename = smb2_rename_path,
5532         .create_hardlink = smb2_create_hardlink,
5533         .query_symlink = smb2_query_symlink,
5534         .query_mf_symlink = smb3_query_mf_symlink,
5535         .create_mf_symlink = smb3_create_mf_symlink,
5536         .open = smb2_open_file,
5537         .set_fid = smb2_set_fid,
5538         .close = smb2_close_file,
5539         .close_getattr = smb2_close_getattr,
5540         .flush = smb2_flush_file,
5541         .async_readv = smb2_async_readv,
5542         .async_writev = smb2_async_writev,
5543         .sync_read = smb2_sync_read,
5544         .sync_write = smb2_sync_write,
5545         .query_dir_first = smb2_query_dir_first,
5546         .query_dir_next = smb2_query_dir_next,
5547         .close_dir = smb2_close_dir,
5548         .calc_smb_size = smb2_calc_size,
5549         .is_status_pending = smb2_is_status_pending,
5550         .is_session_expired = smb2_is_session_expired,
5551         .oplock_response = smb2_oplock_response,
5552         .queryfs = smb311_queryfs,
5553         .mand_lock = smb2_mand_lock,
5554         .mand_unlock_range = smb2_unlock_range,
5555         .push_mand_locks = smb2_push_mandatory_locks,
5556         .get_lease_key = smb2_get_lease_key,
5557         .set_lease_key = smb2_set_lease_key,
5558         .new_lease_key = smb2_new_lease_key,
5559         .generate_signingkey = generate_smb311signingkey,
5560         .calc_signature = smb3_calc_signature,
5561         .set_integrity  = smb3_set_integrity,
5562         .is_read_op = smb21_is_read_op,
5563         .set_oplock_level = smb3_set_oplock_level,
5564         .create_lease_buf = smb3_create_lease_buf,
5565         .parse_lease_buf = smb3_parse_lease_buf,
5566         .copychunk_range = smb2_copychunk_range,
5567         .duplicate_extents = smb2_duplicate_extents,
5568 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5569         .wp_retry_size = smb2_wp_retry_size,
5570         .dir_needs_close = smb2_dir_needs_close,
5571         .fallocate = smb3_fallocate,
5572         .enum_snapshots = smb3_enum_snapshots,
5573         .notify = smb3_notify,
5574         .init_transform_rq = smb3_init_transform_rq,
5575         .is_transform_hdr = smb3_is_transform_hdr,
5576         .receive_transform = smb3_receive_transform,
5577         .get_dfs_refer = smb2_get_dfs_refer,
5578         .select_sectype = smb2_select_sectype,
5579 #ifdef CONFIG_CIFS_XATTR
5580         .query_all_EAs = smb2_query_eas,
5581         .set_EA = smb2_set_ea,
5582 #endif /* CIFS_XATTR */
5583         .get_acl = get_smb2_acl,
5584         .get_acl_by_fid = get_smb2_acl_by_fid,
5585         .set_acl = set_smb2_acl,
5586         .next_header = smb2_next_header,
5587         .ioctl_query_info = smb2_ioctl_query_info,
5588         .make_node = smb2_make_node,
5589         .fiemap = smb3_fiemap,
5590         .llseek = smb3_llseek,
5591         .is_status_io_timeout = smb2_is_status_io_timeout,
5592         .is_network_name_deleted = smb2_is_network_name_deleted,
5593 };
5594
5595 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5596 struct smb_version_values smb20_values = {
5597         .version_string = SMB20_VERSION_STRING,
5598         .protocol_id = SMB20_PROT_ID,
5599         .req_capabilities = 0, /* MBZ */
5600         .large_lock_type = 0,
5601         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5602         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5603         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5604         .header_size = sizeof(struct smb2_hdr),
5605         .header_preamble_size = 0,
5606         .max_header_size = MAX_SMB2_HDR_SIZE,
5607         .read_rsp_size = sizeof(struct smb2_read_rsp),
5608         .lock_cmd = SMB2_LOCK,
5609         .cap_unix = 0,
5610         .cap_nt_find = SMB2_NT_FIND,
5611         .cap_large_files = SMB2_LARGE_FILES,
5612         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5613         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5614         .create_lease_size = sizeof(struct create_lease),
5615 };
5616 #endif /* ALLOW_INSECURE_LEGACY */
5617
5618 struct smb_version_values smb21_values = {
5619         .version_string = SMB21_VERSION_STRING,
5620         .protocol_id = SMB21_PROT_ID,
5621         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5622         .large_lock_type = 0,
5623         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5624         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5625         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5626         .header_size = sizeof(struct smb2_hdr),
5627         .header_preamble_size = 0,
5628         .max_header_size = MAX_SMB2_HDR_SIZE,
5629         .read_rsp_size = sizeof(struct smb2_read_rsp),
5630         .lock_cmd = SMB2_LOCK,
5631         .cap_unix = 0,
5632         .cap_nt_find = SMB2_NT_FIND,
5633         .cap_large_files = SMB2_LARGE_FILES,
5634         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5635         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5636         .create_lease_size = sizeof(struct create_lease),
5637 };
5638
5639 struct smb_version_values smb3any_values = {
5640         .version_string = SMB3ANY_VERSION_STRING,
5641         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5642         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5643         .large_lock_type = 0,
5644         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5645         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5646         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5647         .header_size = sizeof(struct smb2_hdr),
5648         .header_preamble_size = 0,
5649         .max_header_size = MAX_SMB2_HDR_SIZE,
5650         .read_rsp_size = sizeof(struct smb2_read_rsp),
5651         .lock_cmd = SMB2_LOCK,
5652         .cap_unix = 0,
5653         .cap_nt_find = SMB2_NT_FIND,
5654         .cap_large_files = SMB2_LARGE_FILES,
5655         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5656         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5657         .create_lease_size = sizeof(struct create_lease_v2),
5658 };
5659
5660 struct smb_version_values smbdefault_values = {
5661         .version_string = SMBDEFAULT_VERSION_STRING,
5662         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5663         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5664         .large_lock_type = 0,
5665         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5666         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5667         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5668         .header_size = sizeof(struct smb2_hdr),
5669         .header_preamble_size = 0,
5670         .max_header_size = MAX_SMB2_HDR_SIZE,
5671         .read_rsp_size = sizeof(struct smb2_read_rsp),
5672         .lock_cmd = SMB2_LOCK,
5673         .cap_unix = 0,
5674         .cap_nt_find = SMB2_NT_FIND,
5675         .cap_large_files = SMB2_LARGE_FILES,
5676         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5677         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5678         .create_lease_size = sizeof(struct create_lease_v2),
5679 };
5680
5681 struct smb_version_values smb30_values = {
5682         .version_string = SMB30_VERSION_STRING,
5683         .protocol_id = SMB30_PROT_ID,
5684         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5685         .large_lock_type = 0,
5686         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5687         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5688         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5689         .header_size = sizeof(struct smb2_hdr),
5690         .header_preamble_size = 0,
5691         .max_header_size = MAX_SMB2_HDR_SIZE,
5692         .read_rsp_size = sizeof(struct smb2_read_rsp),
5693         .lock_cmd = SMB2_LOCK,
5694         .cap_unix = 0,
5695         .cap_nt_find = SMB2_NT_FIND,
5696         .cap_large_files = SMB2_LARGE_FILES,
5697         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5698         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5699         .create_lease_size = sizeof(struct create_lease_v2),
5700 };
5701
5702 struct smb_version_values smb302_values = {
5703         .version_string = SMB302_VERSION_STRING,
5704         .protocol_id = SMB302_PROT_ID,
5705         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5706         .large_lock_type = 0,
5707         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5708         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5709         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5710         .header_size = sizeof(struct smb2_hdr),
5711         .header_preamble_size = 0,
5712         .max_header_size = MAX_SMB2_HDR_SIZE,
5713         .read_rsp_size = sizeof(struct smb2_read_rsp),
5714         .lock_cmd = SMB2_LOCK,
5715         .cap_unix = 0,
5716         .cap_nt_find = SMB2_NT_FIND,
5717         .cap_large_files = SMB2_LARGE_FILES,
5718         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5719         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5720         .create_lease_size = sizeof(struct create_lease_v2),
5721 };
5722
5723 struct smb_version_values smb311_values = {
5724         .version_string = SMB311_VERSION_STRING,
5725         .protocol_id = SMB311_PROT_ID,
5726         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5727         .large_lock_type = 0,
5728         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5729         .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5730         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5731         .header_size = sizeof(struct smb2_hdr),
5732         .header_preamble_size = 0,
5733         .max_header_size = MAX_SMB2_HDR_SIZE,
5734         .read_rsp_size = sizeof(struct smb2_read_rsp),
5735         .lock_cmd = SMB2_LOCK,
5736         .cap_unix = 0,
5737         .cap_nt_find = SMB2_NT_FIND,
5738         .cap_large_files = SMB2_LARGE_FILES,
5739         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5740         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5741         .create_lease_size = sizeof(struct create_lease_v2),
5742 };