fs/cifs/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 "cifsfs.h"
  16 #include "cifsglob.h"
  17 #include "smb2pdu.h"
  18 #include "smb2proto.h"
  19 #include "cifsproto.h"
  20 #include "cifs_debug.h"
  21 #include "cifs_unicode.h"
  22 #include "smb2status.h"
  23 #include "smb2glob.h"
  24 #include "cifs_ioctl.h"
  25 #include "smbdirect.h"
  26
  27 /* Change credits for different ops and return the total number of credits */
  28 static int
  29 change_conf(struct TCP_Server_Info *server)
  30 {
  31         server->credits += server->echo_credits + server->oplock_credits;
  32         server->oplock_credits = server->echo_credits = 0;
  33         switch (server->credits) {
  34         case 0:
  35                 return 0;
  36         case 1:
  37                 server->echoes = false;
  38                 server->oplocks = false;
  39                 break;
  40         case 2:
  41                 server->echoes = true;
  42                 server->oplocks = false;
  43                 server->echo_credits = 1;
  44                 break;
  45         default:
  46                 server->echoes = true;
  47                 if (enable_oplocks) {
  48                         server->oplocks = true;
  49                         server->oplock_credits = 1;
  50                 } else
  51                         server->oplocks = false;
  52
  53                 server->echo_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return server->credits + server->echo_credits + server->oplock_credits;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server,
  61                  const struct cifs_credits *credits, const int optype)
  62 {
  63         int *val, rc = -1;
  64         unsigned int add = credits->value;
  65         unsigned int instance = credits->instance;
  66         bool reconnect_detected = false;
  67
  68         spin_lock(&server->req_lock);
  69         val = server->ops->get_credits_field(server, optype);
  70
  71         /* eg found case where write overlapping reconnect messed up credits */
  72         if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
  73                 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
  74                         server->hostname, *val);
  75         if ((instance == 0) || (instance == server->reconnect_instance))
  76                 *val += add;
  77         else
  78                 reconnect_detected = true;
  79
  80         if (*val > 65000) {
  81                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  82                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  83         }
  84         server->in_flight--;
  85         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  86                 rc = change_conf(server);
  87         /*
  88          * Sometimes server returns 0 credits on oplock break ack - we need to
  89          * rebalance credits in this case.
  90          */
  91         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  92                  server->oplocks) {
  93                 if (server->credits > 1) {
  94                         server->credits--;
  95                         server->oplock_credits++;
  96                 }
  97         }
  98         spin_unlock(&server->req_lock);
  99         wake_up(&server->request_q);
 100
 101         if (reconnect_detected)
 102                 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
 103                          add, instance);
 104
 105         if (server->tcpStatus == CifsNeedReconnect
 106             || server->tcpStatus == CifsExiting)
 107                 return;
 108
 109         switch (rc) {
 110         case -1:
 111                 /* change_conf hasn't been executed */
 112                 break;
 113         case 0:
 114                 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 115                 break;
 116         case 1:
 117                 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 118                 break;
 119         case 2:
 120                 cifs_dbg(FYI, "disabling oplocks\n");
 121                 break;
 122         default:
 123                 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
 124         }
 125 }
 126
 127 static void
 128 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 129 {
 130         spin_lock(&server->req_lock);
 131         server->credits = val;
 132         if (val == 1)
 133                 server->reconnect_instance++;
 134         spin_unlock(&server->req_lock);
 135         /* don't log while holding the lock */
 136         if (val == 1)
 137                 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
 138 }
 139
 140 static int *
 141 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 142 {
 143         switch (optype) {
 144         case CIFS_ECHO_OP:
 145                 return &server->echo_credits;
 146         case CIFS_OBREAK_OP:
 147                 return &server->oplock_credits;
 148         default:
 149                 return &server->credits;
 150         }
 151 }
 152
 153 static unsigned int
 154 smb2_get_credits(struct mid_q_entry *mid)
 155 {
 156         return mid->credits_received;
 157 }
 158
 159 static int
 160 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 161                       unsigned int *num, struct cifs_credits *credits)
 162 {
 163         int rc = 0;
 164         unsigned int scredits;
 165
 166         spin_lock(&server->req_lock);
 167         while (1) {
 168                 if (server->credits <= 0) {
 169                         spin_unlock(&server->req_lock);
 170                         cifs_num_waiters_inc(server);
 171                         rc = wait_event_killable(server->request_q,
 172                                 has_credits(server, &server->credits, 1));
 173                         cifs_num_waiters_dec(server);
 174                         if (rc)
 175                                 return rc;
 176                         spin_lock(&server->req_lock);
 177                 } else {
 178                         if (server->tcpStatus == CifsExiting) {
 179                                 spin_unlock(&server->req_lock);
 180                                 return -ENOENT;
 181                         }
 182
 183                         scredits = server->credits;
 184                         /* can deadlock with reopen */
 185                         if (scredits <= 8) {
 186                                 *num = SMB2_MAX_BUFFER_SIZE;
 187                                 credits->value = 0;
 188                                 credits->instance = 0;
 189                                 break;
 190                         }
 191
 192                         /* leave some credits for reopen and other ops */
 193                         scredits -= 8;
 194                         *num = min_t(unsigned int, size,
 195                                      scredits * SMB2_MAX_BUFFER_SIZE);
 196
 197                         credits->value =
 198                                 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 199                         credits->instance = server->reconnect_instance;
 200                         server->credits -= credits->value;
 201                         server->in_flight++;
 202                         if (server->in_flight > server->max_in_flight)
 203                                 server->max_in_flight = server->in_flight;
 204                         break;
 205                 }
 206         }
 207         spin_unlock(&server->req_lock);
 208         return rc;
 209 }
 210
 211 static int
 212 smb2_adjust_credits(struct TCP_Server_Info *server,
 213                     struct cifs_credits *credits,
 214                     const unsigned int payload_size)
 215 {
 216         int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
 217
 218         if (!credits->value || credits->value == new_val)
 219                 return 0;
 220
 221         if (credits->value < new_val) {
 222                 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
 223                           credits->value, new_val);
 224                 return -ENOTSUPP;
 225         }
 226
 227         spin_lock(&server->req_lock);
 228
 229         if (server->reconnect_instance != credits->instance) {
 230                 spin_unlock(&server->req_lock);
 231                 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 232                          credits->value - new_val);
 233                 return -EAGAIN;
 234         }
 235
 236         server->credits += credits->value - new_val;
 237         spin_unlock(&server->req_lock);
 238         wake_up(&server->request_q);
 239         credits->value = new_val;
 240         return 0;
 241 }
 242
 243 static __u64
 244 smb2_get_next_mid(struct TCP_Server_Info *server)
 245 {
 246         __u64 mid;
 247         /* for SMB2 we need the current value */
 248         spin_lock(&GlobalMid_Lock);
 249         mid = server->CurrentMid++;
 250         spin_unlock(&GlobalMid_Lock);
 251         return mid;
 252 }
 253
 254 static void
 255 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
 256 {
 257         spin_lock(&GlobalMid_Lock);
 258         if (server->CurrentMid >= val)
 259                 server->CurrentMid -= val;
 260         spin_unlock(&GlobalMid_Lock);
 261 }
 262
 263 static struct mid_q_entry *
 264 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 265 {
 266         struct mid_q_entry *mid;
 267         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 268         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 269
 270         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 271                 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 272                 return NULL;
 273         }
 274
 275         spin_lock(&GlobalMid_Lock);
 276         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 277                 if ((mid->mid == wire_mid) &&
 278                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 279                     (mid->command == shdr->Command)) {
 280                         kref_get(&mid->refcount);
 281                         spin_unlock(&GlobalMid_Lock);
 282                         return mid;
 283                 }
 284         }
 285         spin_unlock(&GlobalMid_Lock);
 286         return NULL;
 287 }
 288
 289 static void
 290 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
 291 {
 292 #ifdef CONFIG_CIFS_DEBUG2
 293         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 294
 295         cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 296                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 297                  shdr->ProcessId);
 298         cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 299                  server->ops->calc_smb_size(buf, server));
 300 #endif
 301 }
 302
 303 static bool
 304 smb2_need_neg(struct TCP_Server_Info *server)
 305 {
 306         return server->max_read == 0;
 307 }
 308
 309 static int
 310 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 311 {
 312         int rc;
 313
 314         cifs_ses_server(ses)->CurrentMid = 0;
 315         rc = SMB2_negotiate(xid, ses);
 316         /* BB we probably don't need to retry with modern servers */
 317         if (rc == -EAGAIN)
 318                 rc = -EHOSTDOWN;
 319         return rc;
 320 }
 321
 322 static unsigned int
 323 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 324 {
 325         struct TCP_Server_Info *server = tcon->ses->server;
 326         unsigned int wsize;
 327
 328         /* start with specified wsize, or default */
 329         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 330         wsize = min_t(unsigned int, wsize, server->max_write);
 331 #ifdef CONFIG_CIFS_SMB_DIRECT
 332         if (server->rdma) {
 333                 if (server->sign)
 334                         wsize = min_t(unsigned int,
 335                                 wsize, server->smbd_conn->max_fragmented_send_size);
 336                 else
 337                         wsize = min_t(unsigned int,
 338                                 wsize, server->smbd_conn->max_readwrite_size);
 339         }
 340 #endif
 341         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 342                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 343
 344         return wsize;
 345 }
 346
 347 static unsigned int
 348 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 349 {
 350         struct TCP_Server_Info *server = tcon->ses->server;
 351         unsigned int wsize;
 352
 353         /* start with specified wsize, or default */
 354         wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
 355         wsize = min_t(unsigned int, wsize, server->max_write);
 356 #ifdef CONFIG_CIFS_SMB_DIRECT
 357         if (server->rdma) {
 358                 if (server->sign)
 359                         wsize = min_t(unsigned int,
 360                                 wsize, server->smbd_conn->max_fragmented_send_size);
 361                 else
 362                         wsize = min_t(unsigned int,
 363                                 wsize, server->smbd_conn->max_readwrite_size);
 364         }
 365 #endif
 366         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 367                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 368
 369         return wsize;
 370 }
 371
 372 static unsigned int
 373 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 374 {
 375         struct TCP_Server_Info *server = tcon->ses->server;
 376         unsigned int rsize;
 377
 378         /* start with specified rsize, or default */
 379         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 380         rsize = min_t(unsigned int, rsize, server->max_read);
 381 #ifdef CONFIG_CIFS_SMB_DIRECT
 382         if (server->rdma) {
 383                 if (server->sign)
 384                         rsize = min_t(unsigned int,
 385                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 386                 else
 387                         rsize = min_t(unsigned int,
 388                                 rsize, server->smbd_conn->max_readwrite_size);
 389         }
 390 #endif
 391
 392         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 393                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 394
 395         return rsize;
 396 }
 397
 398 static unsigned int
 399 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 400 {
 401         struct TCP_Server_Info *server = tcon->ses->server;
 402         unsigned int rsize;
 403
 404         /* start with specified rsize, or default */
 405         rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
 406         rsize = min_t(unsigned int, rsize, server->max_read);
 407 #ifdef CONFIG_CIFS_SMB_DIRECT
 408         if (server->rdma) {
 409                 if (server->sign)
 410                         rsize = min_t(unsigned int,
 411                                 rsize, server->smbd_conn->max_fragmented_recv_size);
 412                 else
 413                         rsize = min_t(unsigned int,
 414                                 rsize, server->smbd_conn->max_readwrite_size);
 415         }
 416 #endif
 417
 418         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 419                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 420
 421         return rsize;
 422 }
 423
 424 static int
 425 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
 426                         size_t buf_len,
 427                         struct cifs_server_iface **iface_list,
 428                         size_t *iface_count)
 429 {
 430         struct network_interface_info_ioctl_rsp *p;
 431         struct sockaddr_in *addr4;
 432         struct sockaddr_in6 *addr6;
 433         struct iface_info_ipv4 *p4;
 434         struct iface_info_ipv6 *p6;
 435         struct cifs_server_iface *info;
 436         ssize_t bytes_left;
 437         size_t next = 0;
 438         int nb_iface = 0;
 439         int rc = 0;
 440
 441         *iface_list = NULL;
 442         *iface_count = 0;
 443
 444         /*
 445          * Fist pass: count and sanity check
 446          */
 447
 448         bytes_left = buf_len;
 449         p = buf;
 450         while (bytes_left >= sizeof(*p)) {
 451                 nb_iface++;
 452                 next = le32_to_cpu(p->Next);
 453                 if (!next) {
 454                         bytes_left -= sizeof(*p);
 455                         break;
 456                 }
 457                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 458                 bytes_left -= next;
 459         }
 460
 461         if (!nb_iface) {
 462                 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
 463                 rc = -EINVAL;
 464                 goto out;
 465         }
 466
 467         if (bytes_left || p->Next)
 468                 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
 469
 470
 471         /*
 472          * Second pass: extract info to internal structure
 473          */
 474
 475         *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
 476         if (!*iface_list) {
 477                 rc = -ENOMEM;
 478                 goto out;
 479         }
 480
 481         info = *iface_list;
 482         bytes_left = buf_len;
 483         p = buf;
 484         while (bytes_left >= sizeof(*p)) {
 485                 info->speed = le64_to_cpu(p->LinkSpeed);
 486                 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
 487                 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
 488
 489                 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
 490                 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
 491                 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
 492                          le32_to_cpu(p->Capability));
 493
 494                 switch (p->Family) {
 495                 /*
 496                  * The kernel and wire socket structures have the same
 497                  * layout and use network byte order but make the
 498                  * conversion explicit in case either one changes.
 499                  */
 500                 case INTERNETWORK:
 501                         addr4 = (struct sockaddr_in *)&info->sockaddr;
 502                         p4 = (struct iface_info_ipv4 *)p->Buffer;
 503                         addr4->sin_family = AF_INET;
 504                         memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
 505
 506                         /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
 507                         addr4->sin_port = cpu_to_be16(CIFS_PORT);
 508
 509                         cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
 510                                  &addr4->sin_addr);
 511                         break;
 512                 case INTERNETWORKV6:
 513                         addr6 = (struct sockaddr_in6 *)&info->sockaddr;
 514                         p6 = (struct iface_info_ipv6 *)p->Buffer;
 515                         addr6->sin6_family = AF_INET6;
 516                         memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
 517
 518                         /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
 519                         addr6->sin6_flowinfo = 0;
 520                         addr6->sin6_scope_id = 0;
 521                         addr6->sin6_port = cpu_to_be16(CIFS_PORT);
 522
 523                         cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
 524                                  &addr6->sin6_addr);
 525                         break;
 526                 default:
 527                         cifs_dbg(VFS,
 528                                  "%s: skipping unsupported socket family\n",
 529                                  __func__);
 530                         goto next_iface;
 531                 }
 532
 533                 (*iface_count)++;
 534                 info++;
 535 next_iface:
 536                 next = le32_to_cpu(p->Next);
 537                 if (!next)
 538                         break;
 539                 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
 540                 bytes_left -= next;
 541         }
 542
 543         if (!*iface_count) {
 544                 rc = -EINVAL;
 545                 goto out;
 546         }
 547
 548 out:
 549         if (rc) {
 550                 kfree(*iface_list);
 551                 *iface_count = 0;
 552                 *iface_list = NULL;
 553         }
 554         return rc;
 555 }
 556
 557 static int compare_iface(const void *ia, const void *ib)
 558 {
 559         const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
 560         const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
 561
 562         return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
 563 }
 564
 565 static int
 566 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 567 {
 568         int rc;
 569         unsigned int ret_data_len = 0;
 570         struct network_interface_info_ioctl_rsp *out_buf = NULL;
 571         struct cifs_server_iface *iface_list;
 572         size_t iface_count;
 573         struct cifs_ses *ses = tcon->ses;
 574
 575         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 576                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 577                         NULL /* no data input */, 0 /* no data input */,
 578                         CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 579         if (rc == -EOPNOTSUPP) {
 580                 cifs_dbg(FYI,
 581                          "server does not support query network interfaces\n");
 582                 goto out;
 583         } else if (rc != 0) {
 584                 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 585                 goto out;
 586         }
 587
 588         rc = parse_server_interfaces(out_buf, ret_data_len,
 589                                      &iface_list, &iface_count);
 590         if (rc)
 591                 goto out;
 592
 593         /* sort interfaces from fastest to slowest */
 594         sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
 595
 596         spin_lock(&ses->iface_lock);
 597         kfree(ses->iface_list);
 598         ses->iface_list = iface_list;
 599         ses->iface_count = iface_count;
 600         ses->iface_last_update = jiffies;
 601         spin_unlock(&ses->iface_lock);
 602
 603 out:
 604         kfree(out_buf);
 605         return rc;
 606 }
 607
 608 static void
 609 smb2_close_cached_fid(struct kref *ref)
 610 {
 611         struct cached_fid *cfid = container_of(ref, struct cached_fid,
 612                                                refcount);
 613
 614         if (cfid->is_valid) {
 615                 cifs_dbg(FYI, "clear cached root file handle\n");
 616                 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 617                            cfid->fid->volatile_fid);
 618                 cfid->is_valid = false;
 619                 cfid->file_all_info_is_valid = false;
 620                 cfid->has_lease = false;
 621         }
 622 }
 623
 624 void close_shroot(struct cached_fid *cfid)
 625 {
 626         mutex_lock(&cfid->fid_mutex);
 627         kref_put(&cfid->refcount, smb2_close_cached_fid);
 628         mutex_unlock(&cfid->fid_mutex);
 629 }
 630
 631 void close_shroot_lease_locked(struct cached_fid *cfid)
 632 {
 633         if (cfid->has_lease) {
 634                 cfid->has_lease = false;
 635                 kref_put(&cfid->refcount, smb2_close_cached_fid);
 636         }
 637 }
 638
 639 void close_shroot_lease(struct cached_fid *cfid)
 640 {
 641         mutex_lock(&cfid->fid_mutex);
 642         close_shroot_lease_locked(cfid);
 643         mutex_unlock(&cfid->fid_mutex);
 644 }
 645
 646 void
 647 smb2_cached_lease_break(struct work_struct *work)
 648 {
 649         struct cached_fid *cfid = container_of(work,
 650                                 struct cached_fid, lease_break);
 651
 652         close_shroot_lease(cfid);
 653 }
 654
 655 /*
 656  * Open the directory at the root of a share
 657  */
 658 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
 659                 struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid)
 660 {
 661         struct cifs_ses *ses = tcon->ses;
 662         struct TCP_Server_Info *server = ses->server;
 663         struct cifs_open_parms oparms;
 664         struct smb2_create_rsp *o_rsp = NULL;
 665         struct smb2_query_info_rsp *qi_rsp = NULL;
 666         int resp_buftype[2];
 667         struct smb_rqst rqst[2];
 668         struct kvec rsp_iov[2];
 669         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
 670         struct kvec qi_iov[1];
 671         int rc, flags = 0;
 672         __le16 utf16_path = 0; /* Null - since an open of top of share */
 673         u8 oplock = SMB2_OPLOCK_LEVEL_II;
 674
 675         mutex_lock(&tcon->crfid.fid_mutex);
 676         if (tcon->crfid.is_valid) {
 677                 cifs_dbg(FYI, "found a cached root file handle\n");
 678                 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
 679                 kref_get(&tcon->crfid.refcount);
 680                 mutex_unlock(&tcon->crfid.fid_mutex);
 681                 return 0;
 682         }
 683
 684         /*
 685          * We do not hold the lock for the open because in case
 686          * SMB2_open needs to reconnect, it will end up calling
 687          * cifs_mark_open_files_invalid() which takes the lock again
 688          * thus causing a deadlock
 689          */
 690
 691         mutex_unlock(&tcon->crfid.fid_mutex);
 692
 693         if (smb3_encryption_required(tcon))
 694                 flags |= CIFS_TRANSFORM_REQ;
 695
 696         memset(rqst, 0, sizeof(rqst));
 697         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
 698         memset(rsp_iov, 0, sizeof(rsp_iov));
 699
 700         /* Open */
 701         memset(&open_iov, 0, sizeof(open_iov));
 702         rqst[0].rq_iov = open_iov;
 703         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
 704
 705         oparms.tcon = tcon;
 706         oparms.create_options = cifs_create_options(cifs_sb, 0);
 707         oparms.desired_access = FILE_READ_ATTRIBUTES;
 708         oparms.disposition = FILE_OPEN;
 709         oparms.fid = pfid;
 710         oparms.reconnect = false;
 711
 712         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
 713         if (rc)
 714                 goto oshr_free;
 715         smb2_set_next_command(tcon, &rqst[0]);
 716
 717         memset(&qi_iov, 0, sizeof(qi_iov));
 718         rqst[1].rq_iov = qi_iov;
 719         rqst[1].rq_nvec = 1;
 720
 721         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
 722                                   COMPOUND_FID, FILE_ALL_INFORMATION,
 723                                   SMB2_O_INFO_FILE, 0,
 724                                   sizeof(struct smb2_file_all_info) +
 725                                   PATH_MAX * 2, 0, NULL);
 726         if (rc)
 727                 goto oshr_free;
 728
 729         smb2_set_related(&rqst[1]);
 730
 731         rc = compound_send_recv(xid, ses, flags, 2, rqst,
 732                                 resp_buftype, rsp_iov);
 733         mutex_lock(&tcon->crfid.fid_mutex);
 734
 735         /*
 736          * Now we need to check again as the cached root might have
 737          * been successfully re-opened from a concurrent process
 738          */
 739
 740         if (tcon->crfid.is_valid) {
 741                 /* work was already done */
 742
 743                 /* stash fids for close() later */
 744                 struct cifs_fid fid = {
 745                         .persistent_fid = pfid->persistent_fid,
 746                         .volatile_fid = pfid->volatile_fid,
 747                 };
 748
 749                 /*
 750                  * caller expects this func to set pfid to a valid
 751                  * cached root, so we copy the existing one and get a
 752                  * reference.
 753                  */
 754                 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
 755                 kref_get(&tcon->crfid.refcount);
 756
 757                 mutex_unlock(&tcon->crfid.fid_mutex);
 758
 759                 if (rc == 0) {
 760                         /* close extra handle outside of crit sec */
 761                         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 762                 }
 763                 goto oshr_free;
 764         }
 765
 766         /* Cached root is still invalid, continue normaly */
 767
 768         if (rc) {
 769                 if (rc == -EREMCHG) {
 770                         tcon->need_reconnect = true;
 771                         printk_once(KERN_WARNING "server share %s deleted\n",
 772                                     tcon->treeName);
 773                 }
 774                 goto oshr_exit;
 775         }
 776
 777         atomic_inc(&tcon->num_remote_opens);
 778
 779         o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
 780         oparms.fid->persistent_fid = o_rsp->PersistentFileId;
 781         oparms.fid->volatile_fid = o_rsp->VolatileFileId;
 782 #ifdef CONFIG_CIFS_DEBUG2
 783         oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
 784 #endif /* CIFS_DEBUG2 */
 785
 786         memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
 787         tcon->crfid.tcon = tcon;
 788         tcon->crfid.is_valid = true;
 789         kref_init(&tcon->crfid.refcount);
 790
 791         /* BB TBD check to see if oplock level check can be removed below */
 792         if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 793                 kref_get(&tcon->crfid.refcount);
 794                 tcon->crfid.has_lease = true;
 795                 smb2_parse_contexts(server, o_rsp,
 796                                 &oparms.fid->epoch,
 797                                 oparms.fid->lease_key, &oplock, NULL);
 798         } else
 799                 goto oshr_exit;
 800
 801         qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
 802         if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
 803                 goto oshr_exit;
 804         if (!smb2_validate_and_copy_iov(
 805                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 806                                 sizeof(struct smb2_file_all_info),
 807                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 808                                 (char *)&tcon->crfid.file_all_info))
 809                 tcon->crfid.file_all_info_is_valid = true;
 810
 811 oshr_exit:
 812         mutex_unlock(&tcon->crfid.fid_mutex);
 813 oshr_free:
 814         SMB2_open_free(&rqst[0]);
 815         SMB2_query_info_free(&rqst[1]);
 816         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 817         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 818         return rc;
 819 }
 820
 821 static void
 822 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 823               struct cifs_sb_info *cifs_sb)
 824 {
 825         int rc;
 826         __le16 srch_path = 0; /* Null - open root of share */
 827         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 828         struct cifs_open_parms oparms;
 829         struct cifs_fid fid;
 830         bool no_cached_open = tcon->nohandlecache;
 831
 832         oparms.tcon = tcon;
 833         oparms.desired_access = FILE_READ_ATTRIBUTES;
 834         oparms.disposition = FILE_OPEN;
 835         oparms.create_options = cifs_create_options(cifs_sb, 0);
 836         oparms.fid = &fid;
 837         oparms.reconnect = false;
 838
 839         if (no_cached_open)
 840                 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
 841                                NULL);
 842         else
 843                 rc = open_shroot(xid, tcon, cifs_sb, &fid);
 844
 845         if (rc)
 846                 return;
 847
 848         SMB3_request_interfaces(xid, tcon);
 849
 850         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 851                         FS_ATTRIBUTE_INFORMATION);
 852         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 853                         FS_DEVICE_INFORMATION);
 854         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 855                         FS_VOLUME_INFORMATION);
 856         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 857                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 858         if (no_cached_open)
 859                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 860         else
 861                 close_shroot(&tcon->crfid);
 862 }
 863
 864 static void
 865 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
 866               struct cifs_sb_info *cifs_sb)
 867 {
 868         int rc;
 869         __le16 srch_path = 0; /* Null - open root of share */
 870         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 871         struct cifs_open_parms oparms;
 872         struct cifs_fid fid;
 873
 874         oparms.tcon = tcon;
 875         oparms.desired_access = FILE_READ_ATTRIBUTES;
 876         oparms.disposition = FILE_OPEN;
 877         oparms.create_options = cifs_create_options(cifs_sb, 0);
 878         oparms.fid = &fid;
 879         oparms.reconnect = false;
 880
 881         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
 882         if (rc)
 883                 return;
 884
 885         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 886                         FS_ATTRIBUTE_INFORMATION);
 887         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 888                         FS_DEVICE_INFORMATION);
 889         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 890 }
 891
 892 static int
 893 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 894                         struct cifs_sb_info *cifs_sb, const char *full_path)
 895 {
 896         int rc;
 897         __le16 *utf16_path;
 898         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 899         struct cifs_open_parms oparms;
 900         struct cifs_fid fid;
 901
 902         if ((*full_path == 0) && tcon->crfid.is_valid)
 903                 return 0;
 904
 905         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 906         if (!utf16_path)
 907                 return -ENOMEM;
 908
 909         oparms.tcon = tcon;
 910         oparms.desired_access = FILE_READ_ATTRIBUTES;
 911         oparms.disposition = FILE_OPEN;
 912         oparms.create_options = cifs_create_options(cifs_sb, 0);
 913         oparms.fid = &fid;
 914         oparms.reconnect = false;
 915
 916         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
 917         if (rc) {
 918                 kfree(utf16_path);
 919                 return rc;
 920         }
 921
 922         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 923         kfree(utf16_path);
 924         return rc;
 925 }
 926
 927 static int
 928 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 929                   struct cifs_sb_info *cifs_sb, const char *full_path,
 930                   u64 *uniqueid, FILE_ALL_INFO *data)
 931 {
 932         *uniqueid = le64_to_cpu(data->IndexNumber);
 933         return 0;
 934 }
 935
 936 static int
 937 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 938                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 939 {
 940         int rc;
 941         struct smb2_file_all_info *smb2_data;
 942
 943         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 944                             GFP_KERNEL);
 945         if (smb2_data == NULL)
 946                 return -ENOMEM;
 947
 948         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 949                              smb2_data);
 950         if (!rc)
 951                 move_smb2_info_to_cifs(data, smb2_data);
 952         kfree(smb2_data);
 953         return rc;
 954 }
 955
 956 #ifdef CONFIG_CIFS_XATTR
 957 static ssize_t
 958 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 959                      struct smb2_file_full_ea_info *src, size_t src_size,
 960                      const unsigned char *ea_name)
 961 {
 962         int rc = 0;
 963         unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
 964         char *name, *value;
 965         size_t buf_size = dst_size;
 966         size_t name_len, value_len, user_name_len;
 967
 968         while (src_size > 0) {
 969                 name = &src->ea_data[0];
 970                 name_len = (size_t)src->ea_name_length;
 971                 value = &src->ea_data[src->ea_name_length + 1];
 972                 value_len = (size_t)le16_to_cpu(src->ea_value_length);
 973
 974                 if (name_len == 0)
 975                         break;
 976
 977                 if (src_size < 8 + name_len + 1 + value_len) {
 978                         cifs_dbg(FYI, "EA entry goes beyond length of list\n");
 979                         rc = -EIO;
 980                         goto out;
 981                 }
 982
 983                 if (ea_name) {
 984                         if (ea_name_len == name_len &&
 985                             memcmp(ea_name, name, name_len) == 0) {
 986                                 rc = value_len;
 987                                 if (dst_size == 0)
 988                                         goto out;
 989                                 if (dst_size < value_len) {
 990                                         rc = -ERANGE;
 991                                         goto out;
 992                                 }
 993                                 memcpy(dst, value, value_len);
 994                                 goto out;
 995                         }
 996                 } else {
 997                         /* 'user.' plus a terminating null */
 998                         user_name_len = 5 + 1 + name_len;
 999
1000                         if (buf_size == 0) {
1001                                 /* skip copy - calc size only */
1002                                 rc += user_name_len;
1003                         } else if (dst_size >= user_name_len) {
1004                                 dst_size -= user_name_len;
1005                                 memcpy(dst, "user.", 5);
1006                                 dst += 5;
1007                                 memcpy(dst, src->ea_data, name_len);
1008                                 dst += name_len;
1009                                 *dst = 0;
1010                                 ++dst;
1011                                 rc += user_name_len;
1012                         } else {
1013                                 /* stop before overrun buffer */
1014                                 rc = -ERANGE;
1015                                 break;
1016                         }
1017                 }
1018
1019                 if (!src->next_entry_offset)
1020                         break;
1021
1022                 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1023                         /* stop before overrun buffer */
1024                         rc = -ERANGE;
1025                         break;
1026                 }
1027                 src_size -= le32_to_cpu(src->next_entry_offset);
1028                 src = (void *)((char *)src +
1029                                le32_to_cpu(src->next_entry_offset));
1030         }
1031
1032         /* didn't find the named attribute */
1033         if (ea_name)
1034                 rc = -ENODATA;
1035
1036 out:
1037         return (ssize_t)rc;
1038 }
1039
1040 static ssize_t
1041 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1042                const unsigned char *path, const unsigned char *ea_name,
1043                char *ea_data, size_t buf_size,
1044                struct cifs_sb_info *cifs_sb)
1045 {
1046         int rc;
1047         __le16 *utf16_path;
1048         struct kvec rsp_iov = {NULL, 0};
1049         int buftype = CIFS_NO_BUFFER;
1050         struct smb2_query_info_rsp *rsp;
1051         struct smb2_file_full_ea_info *info = NULL;
1052
1053         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1054         if (!utf16_path)
1055                 return -ENOMEM;
1056
1057         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1058                                       FILE_READ_EA,
1059                                       FILE_FULL_EA_INFORMATION,
1060                                       SMB2_O_INFO_FILE,
1061                                       CIFSMaxBufSize -
1062                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1063                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1064                                       &rsp_iov, &buftype, cifs_sb);
1065         if (rc) {
1066                 /*
1067                  * If ea_name is NULL (listxattr) and there are no EAs,
1068                  * return 0 as it's not an error. Otherwise, the specified
1069                  * ea_name was not found.
1070                  */
1071                 if (!ea_name && rc == -ENODATA)
1072                         rc = 0;
1073                 goto qeas_exit;
1074         }
1075
1076         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1077         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1078                                le32_to_cpu(rsp->OutputBufferLength),
1079                                &rsp_iov,
1080                                sizeof(struct smb2_file_full_ea_info));
1081         if (rc)
1082                 goto qeas_exit;
1083
1084         info = (struct smb2_file_full_ea_info *)(
1085                         le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1086         rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1087                         le32_to_cpu(rsp->OutputBufferLength), ea_name);
1088
1089  qeas_exit:
1090         kfree(utf16_path);
1091         free_rsp_buf(buftype, rsp_iov.iov_base);
1092         return rc;
1093 }
1094
1095
1096 static int
1097 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1098             const char *path, const char *ea_name, const void *ea_value,
1099             const __u16 ea_value_len, const struct nls_table *nls_codepage,
1100             struct cifs_sb_info *cifs_sb)
1101 {
1102         struct cifs_ses *ses = tcon->ses;
1103         __le16 *utf16_path = NULL;
1104         int ea_name_len = strlen(ea_name);
1105         int flags = 0;
1106         int len;
1107         struct smb_rqst rqst[3];
1108         int resp_buftype[3];
1109         struct kvec rsp_iov[3];
1110         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1111         struct cifs_open_parms oparms;
1112         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1113         struct cifs_fid fid;
1114         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1115         unsigned int size[1];
1116         void *data[1];
1117         struct smb2_file_full_ea_info *ea = NULL;
1118         struct kvec close_iov[1];
1119         struct smb2_query_info_rsp *rsp;
1120         int rc, used_len = 0;
1121
1122         if (smb3_encryption_required(tcon))
1123                 flags |= CIFS_TRANSFORM_REQ;
1124
1125         if (ea_name_len > 255)
1126                 return -EINVAL;
1127
1128         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1129         if (!utf16_path)
1130                 return -ENOMEM;
1131
1132         memset(rqst, 0, sizeof(rqst));
1133         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1134         memset(rsp_iov, 0, sizeof(rsp_iov));
1135
1136         if (ses->server->ops->query_all_EAs) {
1137                 if (!ea_value) {
1138                         rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1139                                                              ea_name, NULL, 0,
1140                                                              cifs_sb);
1141                         if (rc == -ENODATA)
1142                                 goto sea_exit;
1143                 } else {
1144                         /* If we are adding a attribute we should first check
1145                          * if there will be enough space available to store
1146                          * the new EA. If not we should not add it since we
1147                          * would not be able to even read the EAs back.
1148                          */
1149                         rc = smb2_query_info_compound(xid, tcon, utf16_path,
1150                                       FILE_READ_EA,
1151                                       FILE_FULL_EA_INFORMATION,
1152                                       SMB2_O_INFO_FILE,
1153                                       CIFSMaxBufSize -
1154                                       MAX_SMB2_CREATE_RESPONSE_SIZE -
1155                                       MAX_SMB2_CLOSE_RESPONSE_SIZE,
1156                                       &rsp_iov[1], &resp_buftype[1], cifs_sb);
1157                         if (rc == 0) {
1158                                 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1159                                 used_len = le32_to_cpu(rsp->OutputBufferLength);
1160                         }
1161                         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1162                         resp_buftype[1] = CIFS_NO_BUFFER;
1163                         memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1164                         rc = 0;
1165
1166                         /* Use a fudge factor of 256 bytes in case we collide
1167                          * with a different set_EAs command.
1168                          */
1169                         if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1170                            MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1171                            used_len + ea_name_len + ea_value_len + 1) {
1172                                 rc = -ENOSPC;
1173                                 goto sea_exit;
1174                         }
1175                 }
1176         }
1177
1178         /* Open */
1179         memset(&open_iov, 0, sizeof(open_iov));
1180         rqst[0].rq_iov = open_iov;
1181         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1182
1183         memset(&oparms, 0, sizeof(oparms));
1184         oparms.tcon = tcon;
1185         oparms.desired_access = FILE_WRITE_EA;
1186         oparms.disposition = FILE_OPEN;
1187         oparms.create_options = cifs_create_options(cifs_sb, 0);
1188         oparms.fid = &fid;
1189         oparms.reconnect = false;
1190
1191         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1192         if (rc)
1193                 goto sea_exit;
1194         smb2_set_next_command(tcon, &rqst[0]);
1195
1196
1197         /* Set Info */
1198         memset(&si_iov, 0, sizeof(si_iov));
1199         rqst[1].rq_iov = si_iov;
1200         rqst[1].rq_nvec = 1;
1201
1202         len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1203         ea = kzalloc(len, GFP_KERNEL);
1204         if (ea == NULL) {
1205                 rc = -ENOMEM;
1206                 goto sea_exit;
1207         }
1208
1209         ea->ea_name_length = ea_name_len;
1210         ea->ea_value_length = cpu_to_le16(ea_value_len);
1211         memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1212         memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1213
1214         size[0] = len;
1215         data[0] = ea;
1216
1217         rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1218                                 COMPOUND_FID, current->tgid,
1219                                 FILE_FULL_EA_INFORMATION,
1220                                 SMB2_O_INFO_FILE, 0, data, size);
1221         smb2_set_next_command(tcon, &rqst[1]);
1222         smb2_set_related(&rqst[1]);
1223
1224
1225         /* Close */
1226         memset(&close_iov, 0, sizeof(close_iov));
1227         rqst[2].rq_iov = close_iov;
1228         rqst[2].rq_nvec = 1;
1229         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1230         smb2_set_related(&rqst[2]);
1231
1232         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1233                                 resp_buftype, rsp_iov);
1234         /* no need to bump num_remote_opens because handle immediately closed */
1235
1236  sea_exit:
1237         kfree(ea);
1238         kfree(utf16_path);
1239         SMB2_open_free(&rqst[0]);
1240         SMB2_set_info_free(&rqst[1]);
1241         SMB2_close_free(&rqst[2]);
1242         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1243         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1244         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1245         return rc;
1246 }
1247 #endif
1248
1249 static bool
1250 smb2_can_echo(struct TCP_Server_Info *server)
1251 {
1252         return server->echoes;
1253 }
1254
1255 static void
1256 smb2_clear_stats(struct cifs_tcon *tcon)
1257 {
1258         int i;
1259
1260         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1261                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1262                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1263         }
1264 }
1265
1266 static void
1267 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1268 {
1269         seq_puts(m, "\n\tShare Capabilities:");
1270         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1271                 seq_puts(m, " DFS,");
1272         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1273                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1274         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1275                 seq_puts(m, " SCALEOUT,");
1276         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1277                 seq_puts(m, " CLUSTER,");
1278         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1279                 seq_puts(m, " ASYMMETRIC,");
1280         if (tcon->capabilities == 0)
1281                 seq_puts(m, " None");
1282         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1283                 seq_puts(m, " Aligned,");
1284         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1285                 seq_puts(m, " Partition Aligned,");
1286         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1287                 seq_puts(m, " SSD,");
1288         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1289                 seq_puts(m, " TRIM-support,");
1290
1291         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1292         seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1293         if (tcon->perf_sector_size)
1294                 seq_printf(m, "\tOptimal sector size: 0x%x",
1295                            tcon->perf_sector_size);
1296         seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1297 }
1298
1299 static void
1300 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1301 {
1302         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1303         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1304
1305         /*
1306          *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1307          *  totals (requests sent) since those SMBs are per-session not per tcon
1308          */
1309         seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1310                    (long long)(tcon->bytes_read),
1311                    (long long)(tcon->bytes_written));
1312         seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1313                    atomic_read(&tcon->num_local_opens),
1314                    atomic_read(&tcon->num_remote_opens));
1315         seq_printf(m, "\nTreeConnects: %d total %d failed",
1316                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1317                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1318         seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1319                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1320                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1321         seq_printf(m, "\nCreates: %d total %d failed",
1322                    atomic_read(&sent[SMB2_CREATE_HE]),
1323                    atomic_read(&failed[SMB2_CREATE_HE]));
1324         seq_printf(m, "\nCloses: %d total %d failed",
1325                    atomic_read(&sent[SMB2_CLOSE_HE]),
1326                    atomic_read(&failed[SMB2_CLOSE_HE]));
1327         seq_printf(m, "\nFlushes: %d total %d failed",
1328                    atomic_read(&sent[SMB2_FLUSH_HE]),
1329                    atomic_read(&failed[SMB2_FLUSH_HE]));
1330         seq_printf(m, "\nReads: %d total %d failed",
1331                    atomic_read(&sent[SMB2_READ_HE]),
1332                    atomic_read(&failed[SMB2_READ_HE]));
1333         seq_printf(m, "\nWrites: %d total %d failed",
1334                    atomic_read(&sent[SMB2_WRITE_HE]),
1335                    atomic_read(&failed[SMB2_WRITE_HE]));
1336         seq_printf(m, "\nLocks: %d total %d failed",
1337                    atomic_read(&sent[SMB2_LOCK_HE]),
1338                    atomic_read(&failed[SMB2_LOCK_HE]));
1339         seq_printf(m, "\nIOCTLs: %d total %d failed",
1340                    atomic_read(&sent[SMB2_IOCTL_HE]),
1341                    atomic_read(&failed[SMB2_IOCTL_HE]));
1342         seq_printf(m, "\nQueryDirectories: %d total %d failed",
1343                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1344                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1345         seq_printf(m, "\nChangeNotifies: %d total %d failed",
1346                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1347                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1348         seq_printf(m, "\nQueryInfos: %d total %d failed",
1349                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1350                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1351         seq_printf(m, "\nSetInfos: %d total %d failed",
1352                    atomic_read(&sent[SMB2_SET_INFO_HE]),
1353                    atomic_read(&failed[SMB2_SET_INFO_HE]));
1354         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1355                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1356                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1357 }
1358
1359 static void
1360 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1361 {
1362         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1363         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1364
1365         cfile->fid.persistent_fid = fid->persistent_fid;
1366         cfile->fid.volatile_fid = fid->volatile_fid;
1367         cfile->fid.access = fid->access;
1368 #ifdef CONFIG_CIFS_DEBUG2
1369         cfile->fid.mid = fid->mid;
1370 #endif /* CIFS_DEBUG2 */
1371         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1372                                       &fid->purge_cache);
1373         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1374         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1375 }
1376
1377 static void
1378 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1379                 struct cifs_fid *fid)
1380 {
1381         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1382 }
1383
1384 static void
1385 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1386                    struct cifsFileInfo *cfile)
1387 {
1388         struct smb2_file_network_open_info file_inf;
1389         struct inode *inode;
1390         int rc;
1391
1392         rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1393                    cfile->fid.volatile_fid, &file_inf);
1394         if (rc)
1395                 return;
1396
1397         inode = d_inode(cfile->dentry);
1398
1399         spin_lock(&inode->i_lock);
1400         CIFS_I(inode)->time = jiffies;
1401
1402         /* Creation time should not need to be updated on close */
1403         if (file_inf.LastWriteTime)
1404                 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1405         if (file_inf.ChangeTime)
1406                 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1407         if (file_inf.LastAccessTime)
1408                 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1409
1410         /*
1411          * i_blocks is not related to (i_size / i_blksize),
1412          * but instead 512 byte (2**9) size is required for
1413          * calculating num blocks.
1414          */
1415         if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1416                 inode->i_blocks =
1417                         (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1418
1419         /* End of file and Attributes should not have to be updated on close */
1420         spin_unlock(&inode->i_lock);
1421 }
1422
1423 static int
1424 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1425                      u64 persistent_fid, u64 volatile_fid,
1426                      struct copychunk_ioctl *pcchunk)
1427 {
1428         int rc;
1429         unsigned int ret_data_len;
1430         struct resume_key_req *res_key;
1431
1432         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1433                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1434                         NULL, 0 /* no input */, CIFSMaxBufSize,
1435                         (char **)&res_key, &ret_data_len);
1436
1437         if (rc) {
1438                 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1439                 goto req_res_key_exit;
1440         }
1441         if (ret_data_len < sizeof(struct resume_key_req)) {
1442                 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1443                 rc = -EINVAL;
1444                 goto req_res_key_exit;
1445         }
1446         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1447
1448 req_res_key_exit:
1449         kfree(res_key);
1450         return rc;
1451 }
1452
1453 static int
1454 smb2_ioctl_query_info(const unsigned int xid,
1455                       struct cifs_tcon *tcon,
1456                       struct cifs_sb_info *cifs_sb,
1457                       __le16 *path, int is_dir,
1458                       unsigned long p)
1459 {
1460         struct cifs_ses *ses = tcon->ses;
1461         char __user *arg = (char __user *)p;
1462         struct smb_query_info qi;
1463         struct smb_query_info __user *pqi;
1464         int rc = 0;
1465         int flags = 0;
1466         struct smb2_query_info_rsp *qi_rsp = NULL;
1467         struct smb2_ioctl_rsp *io_rsp = NULL;
1468         void *buffer = NULL;
1469         struct smb_rqst rqst[3];
1470         int resp_buftype[3];
1471         struct kvec rsp_iov[3];
1472         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1473         struct cifs_open_parms oparms;
1474         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1475         struct cifs_fid fid;
1476         struct kvec qi_iov[1];
1477         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1478         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1479         struct kvec close_iov[1];
1480         unsigned int size[2];
1481         void *data[2];
1482         int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1483
1484         memset(rqst, 0, sizeof(rqst));
1485         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1486         memset(rsp_iov, 0, sizeof(rsp_iov));
1487
1488         if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1489                 return -EFAULT;
1490
1491         if (qi.output_buffer_length > 1024)
1492                 return -EINVAL;
1493
1494         if (!ses || !(ses->server))
1495                 return -EIO;
1496
1497         if (smb3_encryption_required(tcon))
1498                 flags |= CIFS_TRANSFORM_REQ;
1499
1500         buffer = memdup_user(arg + sizeof(struct smb_query_info),
1501                              qi.output_buffer_length);
1502         if (IS_ERR(buffer))
1503                 return PTR_ERR(buffer);
1504
1505         /* Open */
1506         memset(&open_iov, 0, sizeof(open_iov));
1507         rqst[0].rq_iov = open_iov;
1508         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1509
1510         memset(&oparms, 0, sizeof(oparms));
1511         oparms.tcon = tcon;
1512         oparms.disposition = FILE_OPEN;
1513         oparms.create_options = cifs_create_options(cifs_sb, create_options);
1514         oparms.fid = &fid;
1515         oparms.reconnect = false;
1516
1517         if (qi.flags & PASSTHRU_FSCTL) {
1518                 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1519                 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1520                         oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1521                         break;
1522                 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1523                         oparms.desired_access = GENERIC_ALL;
1524                         break;
1525                 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1526                         oparms.desired_access = GENERIC_READ;
1527                         break;
1528                 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1529                         oparms.desired_access = GENERIC_WRITE;
1530                         break;
1531                 }
1532         } else if (qi.flags & PASSTHRU_SET_INFO) {
1533                 oparms.desired_access = GENERIC_WRITE;
1534         } else {
1535                 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1536         }
1537
1538         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1539         if (rc)
1540                 goto iqinf_exit;
1541         smb2_set_next_command(tcon, &rqst[0]);
1542
1543         /* Query */
1544         if (qi.flags & PASSTHRU_FSCTL) {
1545                 /* Can eventually relax perm check since server enforces too */
1546                 if (!capable(CAP_SYS_ADMIN))
1547                         rc = -EPERM;
1548                 else  {
1549                         memset(&io_iov, 0, sizeof(io_iov));
1550                         rqst[1].rq_iov = io_iov;
1551                         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1552
1553                         rc = SMB2_ioctl_init(tcon, &rqst[1],
1554                                              COMPOUND_FID, COMPOUND_FID,
1555                                              qi.info_type, true, buffer,
1556                                              qi.output_buffer_length,
1557                                              CIFSMaxBufSize -
1558                                              MAX_SMB2_CREATE_RESPONSE_SIZE -
1559                                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
1560                 }
1561         } else if (qi.flags == PASSTHRU_SET_INFO) {
1562                 /* Can eventually relax perm check since server enforces too */
1563                 if (!capable(CAP_SYS_ADMIN))
1564                         rc = -EPERM;
1565                 else  {
1566                         memset(&si_iov, 0, sizeof(si_iov));
1567                         rqst[1].rq_iov = si_iov;
1568                         rqst[1].rq_nvec = 1;
1569
1570                         size[0] = 8;
1571                         data[0] = buffer;
1572
1573                         rc = SMB2_set_info_init(tcon, &rqst[1],
1574                                         COMPOUND_FID, COMPOUND_FID,
1575                                         current->tgid,
1576                                         FILE_END_OF_FILE_INFORMATION,
1577                                         SMB2_O_INFO_FILE, 0, data, size);
1578                 }
1579         } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1580                 memset(&qi_iov, 0, sizeof(qi_iov));
1581                 rqst[1].rq_iov = qi_iov;
1582                 rqst[1].rq_nvec = 1;
1583
1584                 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1585                                   COMPOUND_FID, qi.file_info_class,
1586                                   qi.info_type, qi.additional_information,
1587                                   qi.input_buffer_length,
1588                                   qi.output_buffer_length, buffer);
1589         } else { /* unknown flags */
1590                 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1591                 rc = -EINVAL;
1592         }
1593
1594         if (rc)
1595                 goto iqinf_exit;
1596         smb2_set_next_command(tcon, &rqst[1]);
1597         smb2_set_related(&rqst[1]);
1598
1599         /* Close */
1600         memset(&close_iov, 0, sizeof(close_iov));
1601         rqst[2].rq_iov = close_iov;
1602         rqst[2].rq_nvec = 1;
1603
1604         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1605         if (rc)
1606                 goto iqinf_exit;
1607         smb2_set_related(&rqst[2]);
1608
1609         rc = compound_send_recv(xid, ses, flags, 3, rqst,
1610                                 resp_buftype, rsp_iov);
1611         if (rc)
1612                 goto iqinf_exit;
1613
1614         /* No need to bump num_remote_opens since handle immediately closed */
1615         if (qi.flags & PASSTHRU_FSCTL) {
1616                 pqi = (struct smb_query_info __user *)arg;
1617                 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1618                 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1619                         qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1620                 if (qi.input_buffer_length > 0 &&
1621                     le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1622                     > rsp_iov[1].iov_len)
1623                         goto e_fault;
1624
1625                 if (copy_to_user(&pqi->input_buffer_length,
1626                                  &qi.input_buffer_length,
1627                                  sizeof(qi.input_buffer_length)))
1628                         goto e_fault;
1629
1630                 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1631                                  (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1632                                  qi.input_buffer_length))
1633                         goto e_fault;
1634         } else {
1635                 pqi = (struct smb_query_info __user *)arg;
1636                 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1637                 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1638                         qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1639                 if (copy_to_user(&pqi->input_buffer_length,
1640                                  &qi.input_buffer_length,
1641                                  sizeof(qi.input_buffer_length)))
1642                         goto e_fault;
1643
1644                 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1645                                  qi.input_buffer_length))
1646                         goto e_fault;
1647         }
1648
1649  iqinf_exit:
1650         kfree(buffer);
1651         SMB2_open_free(&rqst[0]);
1652         if (qi.flags & PASSTHRU_FSCTL)
1653                 SMB2_ioctl_free(&rqst[1]);
1654         else
1655                 SMB2_query_info_free(&rqst[1]);
1656
1657         SMB2_close_free(&rqst[2]);
1658         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1659         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1660         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1661         return rc;
1662
1663 e_fault:
1664         rc = -EFAULT;
1665         goto iqinf_exit;
1666 }
1667
1668 static ssize_t
1669 smb2_copychunk_range(const unsigned int xid,
1670                         struct cifsFileInfo *srcfile,
1671                         struct cifsFileInfo *trgtfile, u64 src_off,
1672                         u64 len, u64 dest_off)
1673 {
1674         int rc;
1675         unsigned int ret_data_len;
1676         struct copychunk_ioctl *pcchunk;
1677         struct copychunk_ioctl_rsp *retbuf = NULL;
1678         struct cifs_tcon *tcon;
1679         int chunks_copied = 0;
1680         bool chunk_sizes_updated = false;
1681         ssize_t bytes_written, total_bytes_written = 0;
1682
1683         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1684
1685         if (pcchunk == NULL)
1686                 return -ENOMEM;
1687
1688         cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1689         /* Request a key from the server to identify the source of the copy */
1690         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1691                                 srcfile->fid.persistent_fid,
1692                                 srcfile->fid.volatile_fid, pcchunk);
1693
1694         /* Note: request_res_key sets res_key null only if rc !=0 */
1695         if (rc)
1696                 goto cchunk_out;
1697
1698         /* For now array only one chunk long, will make more flexible later */
1699         pcchunk->ChunkCount = cpu_to_le32(1);
1700         pcchunk->Reserved = 0;
1701         pcchunk->Reserved2 = 0;
1702
1703         tcon = tlink_tcon(trgtfile->tlink);
1704
1705         while (len > 0) {
1706                 pcchunk->SourceOffset = cpu_to_le64(src_off);
1707                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1708                 pcchunk->Length =
1709                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1710
1711                 /* Request server copy to target from src identified by key */
1712                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1713                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1714                         true /* is_fsctl */, (char *)pcchunk,
1715                         sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1716                         (char **)&retbuf, &ret_data_len);
1717                 if (rc == 0) {
1718                         if (ret_data_len !=
1719                                         sizeof(struct copychunk_ioctl_rsp)) {
1720                                 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
1721                                 rc = -EIO;
1722                                 goto cchunk_out;
1723                         }
1724                         if (retbuf->TotalBytesWritten == 0) {
1725                                 cifs_dbg(FYI, "no bytes copied\n");
1726                                 rc = -EIO;
1727                                 goto cchunk_out;
1728                         }
1729                         /*
1730                          * Check if server claimed to write more than we asked
1731                          */
1732                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
1733                             le32_to_cpu(pcchunk->Length)) {
1734                                 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
1735                                 rc = -EIO;
1736                                 goto cchunk_out;
1737                         }
1738                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1739                                 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
1740                                 rc = -EIO;
1741                                 goto cchunk_out;
1742                         }
1743                         chunks_copied++;
1744
1745                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1746                         src_off += bytes_written;
1747                         dest_off += bytes_written;
1748                         len -= bytes_written;
1749                         total_bytes_written += bytes_written;
1750
1751                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1752                                 le32_to_cpu(retbuf->ChunksWritten),
1753                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1754                                 bytes_written);
1755                 } else if (rc == -EINVAL) {
1756                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1757                                 goto cchunk_out;
1758
1759                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1760                                 le32_to_cpu(retbuf->ChunksWritten),
1761                                 le32_to_cpu(retbuf->ChunkBytesWritten),
1762                                 le32_to_cpu(retbuf->TotalBytesWritten));
1763
1764                         /*
1765                          * Check if this is the first request using these sizes,
1766                          * (ie check if copy succeed once with original sizes
1767                          * and check if the server gave us different sizes after
1768                          * we already updated max sizes on previous request).
1769                          * if not then why is the server returning an error now
1770                          */
1771                         if ((chunks_copied != 0) || chunk_sizes_updated)
1772                                 goto cchunk_out;
1773
1774                         /* Check that server is not asking us to grow size */
1775                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1776                                         tcon->max_bytes_chunk)
1777                                 tcon->max_bytes_chunk =
1778                                         le32_to_cpu(retbuf->ChunkBytesWritten);
1779                         else
1780                                 goto cchunk_out; /* server gave us bogus size */
1781
1782                         /* No need to change MaxChunks since already set to 1 */
1783                         chunk_sizes_updated = true;
1784                 } else
1785                         goto cchunk_out;
1786         }
1787
1788 cchunk_out:
1789         kfree(pcchunk);
1790         kfree(retbuf);
1791         if (rc)
1792                 return rc;
1793         else
1794                 return total_bytes_written;
1795 }
1796
1797 static int
1798 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1799                 struct cifs_fid *fid)
1800 {
1801         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1802 }
1803
1804 static unsigned int
1805 smb2_read_data_offset(char *buf)
1806 {
1807         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1808
1809         return rsp->DataOffset;
1810 }
1811
1812 static unsigned int
1813 smb2_read_data_length(char *buf, bool in_remaining)
1814 {
1815         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1816
1817         if (in_remaining)
1818                 return le32_to_cpu(rsp->DataRemaining);
1819
1820         return le32_to_cpu(rsp->DataLength);
1821 }
1822
1823
1824 static int
1825 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1826                struct cifs_io_parms *parms, unsigned int *bytes_read,
1827                char **buf, int *buf_type)
1828 {
1829         parms->persistent_fid = pfid->persistent_fid;
1830         parms->volatile_fid = pfid->volatile_fid;
1831         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1832 }
1833
1834 static int
1835 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1836                 struct cifs_io_parms *parms, unsigned int *written,
1837                 struct kvec *iov, unsigned long nr_segs)
1838 {
1839
1840         parms->persistent_fid = pfid->persistent_fid;
1841         parms->volatile_fid = pfid->volatile_fid;
1842         return SMB2_write(xid, parms, written, iov, nr_segs);
1843 }
1844
1845 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1846 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1847                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1848 {
1849         struct cifsInodeInfo *cifsi;
1850         int rc;
1851
1852         cifsi = CIFS_I(inode);
1853
1854         /* if file already sparse don't bother setting sparse again */
1855         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1856                 return true; /* already sparse */
1857
1858         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1859                 return true; /* already not sparse */
1860
1861         /*
1862          * Can't check for sparse support on share the usual way via the
1863          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1864          * since Samba server doesn't set the flag on the share, yet
1865          * supports the set sparse FSCTL and returns sparse correctly
1866          * in the file attributes. If we fail setting sparse though we
1867          * mark that server does not support sparse files for this share
1868          * to avoid repeatedly sending the unsupported fsctl to server
1869          * if the file is repeatedly extended.
1870          */
1871         if (tcon->broken_sparse_sup)
1872                 return false;
1873
1874         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1875                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1876                         true /* is_fctl */,
1877                         &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1878         if (rc) {
1879                 tcon->broken_sparse_sup = true;
1880                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1881                 return false;
1882         }
1883
1884         if (setsparse)
1885                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1886         else
1887                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1888
1889         return true;
1890 }
1891
1892 static int
1893 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1894                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1895 {
1896         __le64 eof = cpu_to_le64(size);
1897         struct inode *inode;
1898
1899         /*
1900          * If extending file more than one page make sparse. Many Linux fs
1901          * make files sparse by default when extending via ftruncate
1902          */
1903         inode = d_inode(cfile->dentry);
1904
1905         if (!set_alloc && (size > inode->i_size + 8192)) {
1906                 __u8 set_sparse = 1;
1907
1908                 /* whether set sparse succeeds or not, extend the file */
1909                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1910         }
1911
1912         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1913                             cfile->fid.volatile_fid, cfile->pid, &eof);
1914 }
1915
1916 static int
1917 smb2_duplicate_extents(const unsigned int xid,
1918                         struct cifsFileInfo *srcfile,
1919                         struct cifsFileInfo *trgtfile, u64 src_off,
1920                         u64 len, u64 dest_off)
1921 {
1922         int rc;
1923         unsigned int ret_data_len;
1924         struct duplicate_extents_to_file dup_ext_buf;
1925         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1926
1927         /* server fileays advertise duplicate extent support with this flag */
1928         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1929              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1930                 return -EOPNOTSUPP;
1931
1932         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1933         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1934         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1935         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1936         dup_ext_buf.ByteCount = cpu_to_le64(len);
1937         cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1938                 src_off, dest_off, len);
1939
1940         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1941         if (rc)
1942                 goto duplicate_extents_out;
1943
1944         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1945                         trgtfile->fid.volatile_fid,
1946                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1947                         true /* is_fsctl */,
1948                         (char *)&dup_ext_buf,
1949                         sizeof(struct duplicate_extents_to_file),
1950                         CIFSMaxBufSize, NULL,
1951                         &ret_data_len);
1952
1953         if (ret_data_len > 0)
1954                 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1955
1956 duplicate_extents_out:
1957         return rc;
1958 }
1959
1960 static int
1961 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1962                    struct cifsFileInfo *cfile)
1963 {
1964         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1965                             cfile->fid.volatile_fid);
1966 }
1967
1968 static int
1969 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1970                    struct cifsFileInfo *cfile)
1971 {
1972         struct fsctl_set_integrity_information_req integr_info;
1973         unsigned int ret_data_len;
1974
1975         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1976         integr_info.Flags = 0;
1977         integr_info.Reserved = 0;
1978
1979         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1980                         cfile->fid.volatile_fid,
1981                         FSCTL_SET_INTEGRITY_INFORMATION,
1982                         true /* is_fsctl */,
1983                         (char *)&integr_info,
1984                         sizeof(struct fsctl_set_integrity_information_req),
1985                         CIFSMaxBufSize, NULL,
1986                         &ret_data_len);
1987
1988 }
1989
1990 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1991 #define GMT_TOKEN_SIZE 50
1992
1993 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1994
1995 /*
1996  * Input buffer contains (empty) struct smb_snapshot array with size filled in
1997  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1998  */
1999 static int
2000 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2001                    struct cifsFileInfo *cfile, void __user *ioc_buf)
2002 {
2003         char *retbuf = NULL;
2004         unsigned int ret_data_len = 0;
2005         int rc;
2006         u32 max_response_size;
2007         struct smb_snapshot_array snapshot_in;
2008
2009         /*
2010          * On the first query to enumerate the list of snapshots available
2011          * for this volume the buffer begins with 0 (number of snapshots
2012          * which can be returned is zero since at that point we do not know
2013          * how big the buffer needs to be). On the second query,
2014          * it (ret_data_len) is set to number of snapshots so we can
2015          * know to set the maximum response size larger (see below).
2016          */
2017         if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2018                 return -EFAULT;
2019
2020         /*
2021          * Note that for snapshot queries that servers like Azure expect that
2022          * the first query be minimal size (and just used to get the number/size
2023          * of previous versions) so response size must be specified as EXACTLY
2024          * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2025          * of eight bytes.
2026          */
2027         if (ret_data_len == 0)
2028                 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2029         else
2030                 max_response_size = CIFSMaxBufSize;
2031
2032         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2033                         cfile->fid.volatile_fid,
2034                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2035                         true /* is_fsctl */,
2036                         NULL, 0 /* no input data */, max_response_size,
2037                         (char **)&retbuf,
2038                         &ret_data_len);
2039         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2040                         rc, ret_data_len);
2041         if (rc)
2042                 return rc;
2043
2044         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2045                 /* Fixup buffer */
2046                 if (copy_from_user(&snapshot_in, ioc_buf,
2047                     sizeof(struct smb_snapshot_array))) {
2048                         rc = -EFAULT;
2049                         kfree(retbuf);
2050                         return rc;
2051                 }
2052
2053                 /*
2054                  * Check for min size, ie not large enough to fit even one GMT
2055                  * token (snapshot).  On the first ioctl some users may pass in
2056                  * smaller size (or zero) to simply get the size of the array
2057                  * so the user space caller can allocate sufficient memory
2058                  * and retry the ioctl again with larger array size sufficient
2059                  * to hold all of the snapshot GMT tokens on the second try.
2060                  */
2061                 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2062                         ret_data_len = sizeof(struct smb_snapshot_array);
2063
2064                 /*
2065                  * We return struct SRV_SNAPSHOT_ARRAY, followed by
2066                  * the snapshot array (of 50 byte GMT tokens) each
2067                  * representing an available previous version of the data
2068                  */
2069                 if (ret_data_len > (snapshot_in.snapshot_array_size +
2070                                         sizeof(struct smb_snapshot_array)))
2071                         ret_data_len = snapshot_in.snapshot_array_size +
2072                                         sizeof(struct smb_snapshot_array);
2073
2074                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2075                         rc = -EFAULT;
2076         }
2077
2078         kfree(retbuf);
2079         return rc;
2080 }
2081
2082
2083
2084 static int
2085 smb3_notify(const unsigned int xid, struct file *pfile,
2086             void __user *ioc_buf)
2087 {
2088         struct smb3_notify notify;
2089         struct dentry *dentry = pfile->f_path.dentry;
2090         struct inode *inode = file_inode(pfile);
2091         struct cifs_sb_info *cifs_sb;
2092         struct cifs_open_parms oparms;
2093         struct cifs_fid fid;
2094         struct cifs_tcon *tcon;
2095         unsigned char *path = NULL;
2096         __le16 *utf16_path = NULL;
2097         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2098         int rc = 0;
2099
2100         path = build_path_from_dentry(dentry);
2101         if (path == NULL)
2102                 return -ENOMEM;
2103
2104         cifs_sb = CIFS_SB(inode->i_sb);
2105
2106         utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2107         if (utf16_path == NULL) {
2108                 rc = -ENOMEM;
2109                 goto notify_exit;
2110         }
2111
2112         if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2113                 rc = -EFAULT;
2114                 goto notify_exit;
2115         }
2116
2117         tcon = cifs_sb_master_tcon(cifs_sb);
2118         oparms.tcon = tcon;
2119         oparms.desired_access = FILE_READ_ATTRIBUTES;
2120         oparms.disposition = FILE_OPEN;
2121         oparms.create_options = cifs_create_options(cifs_sb, 0);
2122         oparms.fid = &fid;
2123         oparms.reconnect = false;
2124
2125         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2126         if (rc)
2127                 goto notify_exit;
2128
2129         rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2130                                 notify.watch_tree, notify.completion_filter);
2131
2132         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2133
2134         cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2135
2136 notify_exit:
2137         kfree(path);
2138         kfree(utf16_path);
2139         return rc;
2140 }
2141
2142 static int
2143 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2144                      const char *path, struct cifs_sb_info *cifs_sb,
2145                      struct cifs_fid *fid, __u16 search_flags,
2146                      struct cifs_search_info *srch_inf)
2147 {
2148         __le16 *utf16_path;
2149         struct smb_rqst rqst[2];
2150         struct kvec rsp_iov[2];
2151         int resp_buftype[2];
2152         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2153         struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2154         int rc, flags = 0;
2155         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2156         struct cifs_open_parms oparms;
2157         struct smb2_query_directory_rsp *qd_rsp = NULL;
2158         struct smb2_create_rsp *op_rsp = NULL;
2159
2160         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2161         if (!utf16_path)
2162                 return -ENOMEM;
2163
2164         if (smb3_encryption_required(tcon))
2165                 flags |= CIFS_TRANSFORM_REQ;
2166
2167         memset(rqst, 0, sizeof(rqst));
2168         resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2169         memset(rsp_iov, 0, sizeof(rsp_iov));
2170
2171         /* Open */
2172         memset(&open_iov, 0, sizeof(open_iov));
2173         rqst[0].rq_iov = open_iov;
2174         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2175
2176         oparms.tcon = tcon;
2177         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2178         oparms.disposition = FILE_OPEN;
2179         oparms.create_options = cifs_create_options(cifs_sb, 0);
2180         oparms.fid = fid;
2181         oparms.reconnect = false;
2182
2183         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2184         if (rc)
2185                 goto qdf_free;
2186         smb2_set_next_command(tcon, &rqst[0]);
2187
2188         /* Query directory */
2189         srch_inf->entries_in_buffer = 0;
2190         srch_inf->index_of_last_entry = 2;
2191
2192         memset(&qd_iov, 0, sizeof(qd_iov));
2193         rqst[1].rq_iov = qd_iov;
2194         rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2195
2196         rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2197                                        COMPOUND_FID, COMPOUND_FID,
2198                                        0, srch_inf->info_level);
2199         if (rc)
2200                 goto qdf_free;
2201
2202         smb2_set_related(&rqst[1]);
2203
2204         rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2205                                 resp_buftype, rsp_iov);
2206
2207         /* If the open failed there is nothing to do */
2208         op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2209         if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2210                 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2211                 goto qdf_free;
2212         }
2213         fid->persistent_fid = op_rsp->PersistentFileId;
2214         fid->volatile_fid = op_rsp->VolatileFileId;
2215
2216         /* Anything else than ENODATA means a genuine error */
2217         if (rc && rc != -ENODATA) {
2218                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2219                 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2220                 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2221                                          tcon->tid, tcon->ses->Suid, 0, 0, rc);
2222                 goto qdf_free;
2223         }
2224
2225         atomic_inc(&tcon->num_remote_opens);
2226
2227         qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2228         if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2229                 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2230                                           tcon->tid, tcon->ses->Suid, 0, 0);
2231                 srch_inf->endOfSearch = true;
2232                 rc = 0;
2233                 goto qdf_free;
2234         }
2235
2236         rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2237                                         srch_inf);
2238         if (rc) {
2239                 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2240                         tcon->ses->Suid, 0, 0, rc);
2241                 goto qdf_free;
2242         }
2243         resp_buftype[1] = CIFS_NO_BUFFER;
2244
2245         trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2246                         tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2247
2248  qdf_free:
2249         kfree(utf16_path);
2250         SMB2_open_free(&rqst[0]);
2251         SMB2_query_directory_free(&rqst[1]);
2252         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2253         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2254         return rc;
2255 }
2256
2257 static int
2258 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2259                     struct cifs_fid *fid, __u16 search_flags,
2260                     struct cifs_search_info *srch_inf)
2261 {
2262         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2263                                     fid->volatile_fid, 0, srch_inf);
2264 }
2265
2266 static int
2267 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2268                struct cifs_fid *fid)
2269 {
2270         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2271 }
2272
2273 /*
2274  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2275  * the number of credits and return true. Otherwise - return false.
2276  */
2277 static bool
2278 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2279 {
2280         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2281
2282         if (shdr->Status != STATUS_PENDING)
2283                 return false;
2284
2285         if (shdr->CreditRequest) {
2286                 spin_lock(&server->req_lock);
2287                 server->credits += le16_to_cpu(shdr->CreditRequest);
2288                 spin_unlock(&server->req_lock);
2289                 wake_up(&server->request_q);
2290         }
2291
2292         return true;
2293 }
2294
2295 static bool
2296 smb2_is_session_expired(char *buf)
2297 {
2298         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2299
2300         if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2301             shdr->Status != STATUS_USER_SESSION_DELETED)
2302                 return false;
2303
2304         trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2305                                le16_to_cpu(shdr->Command),
2306                                le64_to_cpu(shdr->MessageId));
2307         cifs_dbg(FYI, "Session expired or deleted\n");
2308
2309         return true;
2310 }
2311
2312 static int
2313 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2314                      struct cifsInodeInfo *cinode)
2315 {
2316         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2317                 return SMB2_lease_break(0, tcon, cinode->lease_key,
2318                                         smb2_get_lease_state(cinode));
2319
2320         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2321                                  fid->volatile_fid,
2322                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
2323 }
2324
2325 void
2326 smb2_set_related(struct smb_rqst *rqst)
2327 {
2328         struct smb2_sync_hdr *shdr;
2329
2330         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2331         if (shdr == NULL) {
2332                 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2333                 return;
2334         }
2335         shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2336 }
2337
2338 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2339
2340 void
2341 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2342 {
2343         struct smb2_sync_hdr *shdr;
2344         struct cifs_ses *ses = tcon->ses;
2345         struct TCP_Server_Info *server = ses->server;
2346         unsigned long len = smb_rqst_len(server, rqst);
2347         int i, num_padding;
2348
2349         shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2350         if (shdr == NULL) {
2351                 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2352                 return;
2353         }
2354
2355         /* SMB headers in a compound are 8 byte aligned. */
2356
2357         /* No padding needed */
2358         if (!(len & 7))
2359                 goto finished;
2360
2361         num_padding = 8 - (len & 7);
2362         if (!smb3_encryption_required(tcon)) {
2363                 /*
2364                  * If we do not have encryption then we can just add an extra
2365                  * iov for the padding.
2366                  */
2367                 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2368                 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2369                 rqst->rq_nvec++;
2370                 len += num_padding;
2371         } else {
2372                 /*
2373                  * We can not add a small padding iov for the encryption case
2374                  * because the encryption framework can not handle the padding
2375                  * iovs.
2376                  * We have to flatten this into a single buffer and add
2377                  * the padding to it.
2378                  */
2379                 for (i = 1; i < rqst->rq_nvec; i++) {
2380                         memcpy(rqst->rq_iov[0].iov_base +
2381                                rqst->rq_iov[0].iov_len,
2382                                rqst->rq_iov[i].iov_base,
2383                                rqst->rq_iov[i].iov_len);
2384                         rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2385                 }
2386                 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2387                        0, num_padding);
2388                 rqst->rq_iov[0].iov_len += num_padding;
2389                 len += num_padding;
2390                 rqst->rq_nvec = 1;
2391         }
2392
2393  finished:
2394         shdr->NextCommand = cpu_to_le32(len);
2395 }
2396
2397 /*
2398  * Passes the query info response back to the caller on success.
2399  * Caller need to free this with free_rsp_buf().
2400  */
2401 int
2402 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2403                          __le16 *utf16_path, u32 desired_access,
2404                          u32 class, u32 type, u32 output_len,
2405                          struct kvec *rsp, int *buftype,
2406                          struct cifs_sb_info *cifs_sb)
2407 {
2408         struct cifs_ses *ses = tcon->ses;
2409         int flags = 0;
2410         struct smb_rqst rqst[3];
2411         int resp_buftype[3];
2412         struct kvec rsp_iov[3];
2413         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2414         struct kvec qi_iov[1];
2415         struct kvec close_iov[1];
2416         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2417         struct cifs_open_parms oparms;
2418         struct cifs_fid fid;
2419         int rc;
2420
2421         if (smb3_encryption_required(tcon))
2422                 flags |= CIFS_TRANSFORM_REQ;
2423
2424         memset(rqst, 0, sizeof(rqst));
2425         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2426         memset(rsp_iov, 0, sizeof(rsp_iov));
2427
2428         memset(&open_iov, 0, sizeof(open_iov));
2429         rqst[0].rq_iov = open_iov;
2430         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2431
2432         oparms.tcon = tcon;
2433         oparms.desired_access = desired_access;
2434         oparms.disposition = FILE_OPEN;
2435         oparms.create_options = cifs_create_options(cifs_sb, 0);
2436         oparms.fid = &fid;
2437         oparms.reconnect = false;
2438
2439         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2440         if (rc)
2441                 goto qic_exit;
2442         smb2_set_next_command(tcon, &rqst[0]);
2443
2444         memset(&qi_iov, 0, sizeof(qi_iov));
2445         rqst[1].rq_iov = qi_iov;
2446         rqst[1].rq_nvec = 1;
2447
2448         rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2449                                   class, type, 0,
2450                                   output_len, 0,
2451                                   NULL);
2452         if (rc)
2453                 goto qic_exit;
2454         smb2_set_next_command(tcon, &rqst[1]);
2455         smb2_set_related(&rqst[1]);
2456
2457         memset(&close_iov, 0, sizeof(close_iov));
2458         rqst[2].rq_iov = close_iov;
2459         rqst[2].rq_nvec = 1;
2460
2461         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2462         if (rc)
2463                 goto qic_exit;
2464         smb2_set_related(&rqst[2]);
2465
2466         rc = compound_send_recv(xid, ses, flags, 3, rqst,
2467                                 resp_buftype, rsp_iov);
2468         if (rc) {
2469                 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2470                 if (rc == -EREMCHG) {
2471                         tcon->need_reconnect = true;
2472                         printk_once(KERN_WARNING "server share %s deleted\n",
2473                                     tcon->treeName);
2474                 }
2475                 goto qic_exit;
2476         }
2477         *rsp = rsp_iov[1];
2478         *buftype = resp_buftype[1];
2479
2480  qic_exit:
2481         SMB2_open_free(&rqst[0]);
2482         SMB2_query_info_free(&rqst[1]);
2483         SMB2_close_free(&rqst[2]);
2484         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2485         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2486         return rc;
2487 }
2488
2489 static int
2490 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2491              struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2492 {
2493         struct smb2_query_info_rsp *rsp;
2494         struct smb2_fs_full_size_info *info = NULL;
2495         __le16 utf16_path = 0; /* Null - open root of share */
2496         struct kvec rsp_iov = {NULL, 0};
2497         int buftype = CIFS_NO_BUFFER;
2498         int rc;
2499
2500
2501         rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2502                                       FILE_READ_ATTRIBUTES,
2503                                       FS_FULL_SIZE_INFORMATION,
2504                                       SMB2_O_INFO_FILESYSTEM,
2505                                       sizeof(struct smb2_fs_full_size_info),
2506                                       &rsp_iov, &buftype, cifs_sb);
2507         if (rc)
2508                 goto qfs_exit;
2509
2510         rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2511         buf->f_type = SMB2_MAGIC_NUMBER;
2512         info = (struct smb2_fs_full_size_info *)(
2513                 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2514         rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2515                                le32_to_cpu(rsp->OutputBufferLength),
2516                                &rsp_iov,
2517                                sizeof(struct smb2_fs_full_size_info));
2518         if (!rc)
2519                 smb2_copy_fs_info_to_kstatfs(info, buf);
2520
2521 qfs_exit:
2522         free_rsp_buf(buftype, rsp_iov.iov_base);
2523         return rc;
2524 }
2525
2526 static int
2527 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2528                struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2529 {
2530         int rc;
2531         __le16 srch_path = 0; /* Null - open root of share */
2532         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2533         struct cifs_open_parms oparms;
2534         struct cifs_fid fid;
2535
2536         if (!tcon->posix_extensions)
2537                 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2538
2539         oparms.tcon = tcon;
2540         oparms.desired_access = FILE_READ_ATTRIBUTES;
2541         oparms.disposition = FILE_OPEN;
2542         oparms.create_options = cifs_create_options(cifs_sb, 0);
2543         oparms.fid = &fid;
2544         oparms.reconnect = false;
2545
2546         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2547         if (rc)
2548                 return rc;
2549
2550         rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2551                                    fid.volatile_fid, buf);
2552         buf->f_type = SMB2_MAGIC_NUMBER;
2553         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2554         return rc;
2555 }
2556
2557 static bool
2558 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2559 {
2560         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2561                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2562 }
2563
2564 static int
2565 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2566                __u64 length, __u32 type, int lock, int unlock, bool wait)
2567 {
2568         if (unlock && !lock)
2569                 type = SMB2_LOCKFLAG_UNLOCK;
2570         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2571                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2572                          current->tgid, length, offset, type, wait);
2573 }
2574
2575 static void
2576 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2577 {
2578         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2579 }
2580
2581 static void
2582 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2583 {
2584         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2585 }
2586
2587 static void
2588 smb2_new_lease_key(struct cifs_fid *fid)
2589 {
2590         generate_random_uuid(fid->lease_key);
2591 }
2592
2593 static int
2594 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2595                    const char *search_name,
2596                    struct dfs_info3_param **target_nodes,
2597                    unsigned int *num_of_nodes,
2598                    const struct nls_table *nls_codepage, int remap)
2599 {
2600         int rc;
2601         __le16 *utf16_path = NULL;
2602         int utf16_path_len = 0;
2603         struct cifs_tcon *tcon;
2604         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2605         struct get_dfs_referral_rsp *dfs_rsp = NULL;
2606         u32 dfs_req_size = 0, dfs_rsp_size = 0;
2607
2608         cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2609
2610         /*
2611          * Try to use the IPC tcon, otherwise just use any
2612          */
2613         tcon = ses->tcon_ipc;
2614         if (tcon == NULL) {
2615                 spin_lock(&cifs_tcp_ses_lock);
2616                 tcon = list_first_entry_or_null(&ses->tcon_list,
2617                                                 struct cifs_tcon,
2618                                                 tcon_list);
2619                 if (tcon)
2620                         tcon->tc_count++;
2621                 spin_unlock(&cifs_tcp_ses_lock);
2622         }
2623
2624         if (tcon == NULL) {
2625                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2626                          ses);
2627                 rc = -ENOTCONN;
2628                 goto out;
2629         }
2630
2631         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2632                                            &utf16_path_len,
2633                                            nls_codepage, remap);
2634         if (!utf16_path) {
2635                 rc = -ENOMEM;
2636                 goto out;
2637         }
2638
2639         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2640         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2641         if (!dfs_req) {
2642                 rc = -ENOMEM;
2643                 goto out;
2644         }
2645
2646         /* Highest DFS referral version understood */
2647         dfs_req->MaxReferralLevel = DFS_VERSION;
2648
2649         /* Path to resolve in an UTF-16 null-terminated string */
2650         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2651
2652         do {
2653                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2654                                 FSCTL_DFS_GET_REFERRALS,
2655                                 true /* is_fsctl */,
2656                                 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2657                                 (char **)&dfs_rsp, &dfs_rsp_size);
2658         } while (rc == -EAGAIN);
2659
2660         if (rc) {
2661                 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2662                         cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2663                 goto out;
2664         }
2665
2666         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2667                                  num_of_nodes, target_nodes,
2668                                  nls_codepage, remap, search_name,
2669                                  true /* is_unicode */);
2670         if (rc) {
2671                 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2672                 goto out;
2673         }
2674
2675  out:
2676         if (tcon && !tcon->ipc) {
2677                 /* ipc tcons are not refcounted */
2678                 spin_lock(&cifs_tcp_ses_lock);
2679                 tcon->tc_count--;
2680                 spin_unlock(&cifs_tcp_ses_lock);
2681         }
2682         kfree(utf16_path);
2683         kfree(dfs_req);
2684         kfree(dfs_rsp);
2685         return rc;
2686 }
2687
2688 static int
2689 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2690                       u32 plen, char **target_path,
2691                       struct cifs_sb_info *cifs_sb)
2692 {
2693         unsigned int len;
2694
2695         /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2696         len = le16_to_cpu(symlink_buf->ReparseDataLength);
2697
2698         if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2699                 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2700                         le64_to_cpu(symlink_buf->InodeType));
2701                 return -EOPNOTSUPP;
2702         }
2703
2704         *target_path = cifs_strndup_from_utf16(
2705                                 symlink_buf->PathBuffer,
2706                                 len, true, cifs_sb->local_nls);
2707         if (!(*target_path))
2708                 return -ENOMEM;
2709
2710         convert_delimiter(*target_path, '/');
2711         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2712
2713         return 0;
2714 }
2715
2716 static int
2717 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2718                       u32 plen, char **target_path,
2719                       struct cifs_sb_info *cifs_sb)
2720 {
2721         unsigned int sub_len;
2722         unsigned int sub_offset;
2723
2724         /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2725
2726         sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2727         sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2728         if (sub_offset + 20 > plen ||
2729             sub_offset + sub_len + 20 > plen) {
2730                 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2731                 return -EIO;
2732         }
2733
2734         *target_path = cifs_strndup_from_utf16(
2735                                 symlink_buf->PathBuffer + sub_offset,
2736                                 sub_len, true, cifs_sb->local_nls);
2737         if (!(*target_path))
2738                 return -ENOMEM;
2739
2740         convert_delimiter(*target_path, '/');
2741         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2742
2743         return 0;
2744 }
2745
2746 static int
2747 parse_reparse_point(struct reparse_data_buffer *buf,
2748                     u32 plen, char **target_path,
2749                     struct cifs_sb_info *cifs_sb)
2750 {
2751         if (plen < sizeof(struct reparse_data_buffer)) {
2752                 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2753                          "at least 8 bytes but was %d\n", plen);
2754                 return -EIO;
2755         }
2756
2757         if (plen < le16_to_cpu(buf->ReparseDataLength) +
2758             sizeof(struct reparse_data_buffer)) {
2759                 cifs_dbg(VFS, "srv returned invalid reparse buf "
2760                          "length: %d\n", plen);
2761                 return -EIO;
2762         }
2763
2764         /* See MS-FSCC 2.1.2 */
2765         switch (le32_to_cpu(buf->ReparseTag)) {
2766         case IO_REPARSE_TAG_NFS:
2767                 return parse_reparse_posix(
2768                         (struct reparse_posix_data *)buf,
2769                         plen, target_path, cifs_sb);
2770         case IO_REPARSE_TAG_SYMLINK:
2771                 return parse_reparse_symlink(
2772                         (struct reparse_symlink_data_buffer *)buf,
2773                         plen, target_path, cifs_sb);
2774         default:
2775                 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2776                          "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2777                 return -EOPNOTSUPP;
2778         }
2779 }
2780
2781 #define SMB2_SYMLINK_STRUCT_SIZE \
2782         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2783
2784 static int
2785 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2786                    struct cifs_sb_info *cifs_sb, const char *full_path,
2787                    char **target_path, bool is_reparse_point)
2788 {
2789         int rc;
2790         __le16 *utf16_path = NULL;
2791         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2792         struct cifs_open_parms oparms;
2793         struct cifs_fid fid;
2794         struct kvec err_iov = {NULL, 0};
2795         struct smb2_err_rsp *err_buf = NULL;
2796         struct smb2_symlink_err_rsp *symlink;
2797         unsigned int sub_len;
2798         unsigned int sub_offset;
2799         unsigned int print_len;
2800         unsigned int print_offset;
2801         int flags = 0;
2802         struct smb_rqst rqst[3];
2803         int resp_buftype[3];
2804         struct kvec rsp_iov[3];
2805         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2806         struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2807         struct kvec close_iov[1];
2808         struct smb2_create_rsp *create_rsp;
2809         struct smb2_ioctl_rsp *ioctl_rsp;
2810         struct reparse_data_buffer *reparse_buf;
2811         int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2812         u32 plen;
2813
2814         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2815
2816         *target_path = NULL;
2817
2818         if (smb3_encryption_required(tcon))
2819                 flags |= CIFS_TRANSFORM_REQ;
2820
2821         memset(rqst, 0, sizeof(rqst));
2822         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2823         memset(rsp_iov, 0, sizeof(rsp_iov));
2824
2825         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2826         if (!utf16_path)
2827                 return -ENOMEM;
2828
2829         /* Open */
2830         memset(&open_iov, 0, sizeof(open_iov));
2831         rqst[0].rq_iov = open_iov;
2832         rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2833
2834         memset(&oparms, 0, sizeof(oparms));
2835         oparms.tcon = tcon;
2836         oparms.desired_access = FILE_READ_ATTRIBUTES;
2837         oparms.disposition = FILE_OPEN;
2838         oparms.create_options = cifs_create_options(cifs_sb, create_options);
2839         oparms.fid = &fid;
2840         oparms.reconnect = false;
2841
2842         rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2843         if (rc)
2844                 goto querty_exit;
2845         smb2_set_next_command(tcon, &rqst[0]);
2846
2847
2848         /* IOCTL */
2849         memset(&io_iov, 0, sizeof(io_iov));
2850         rqst[1].rq_iov = io_iov;
2851         rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2852
2853         rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2854                              fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2855                              true /* is_fctl */, NULL, 0,
2856                              CIFSMaxBufSize -
2857                              MAX_SMB2_CREATE_RESPONSE_SIZE -
2858                              MAX_SMB2_CLOSE_RESPONSE_SIZE);
2859         if (rc)
2860                 goto querty_exit;
2861
2862         smb2_set_next_command(tcon, &rqst[1]);
2863         smb2_set_related(&rqst[1]);
2864
2865
2866         /* Close */
2867         memset(&close_iov, 0, sizeof(close_iov));
2868         rqst[2].rq_iov = close_iov;
2869         rqst[2].rq_nvec = 1;
2870
2871         rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2872         if (rc)
2873                 goto querty_exit;
2874
2875         smb2_set_related(&rqst[2]);
2876
2877         rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2878                                 resp_buftype, rsp_iov);
2879
2880         create_rsp = rsp_iov[0].iov_base;
2881         if (create_rsp && create_rsp->sync_hdr.Status)
2882                 err_iov = rsp_iov[0];
2883         ioctl_rsp = rsp_iov[1].iov_base;
2884
2885         /*
2886          * Open was successful and we got an ioctl response.
2887          */
2888         if ((rc == 0) && (is_reparse_point)) {
2889                 /* See MS-FSCC 2.3.23 */
2890
2891                 reparse_buf = (struct reparse_data_buffer *)
2892                         ((char *)ioctl_rsp +
2893                          le32_to_cpu(ioctl_rsp->OutputOffset));
2894                 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2895
2896                 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2897                     rsp_iov[1].iov_len) {
2898                         cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2899                                  plen);
2900                         rc = -EIO;
2901                         goto querty_exit;
2902                 }
2903
2904                 rc = parse_reparse_point(reparse_buf, plen, target_path,
2905                                          cifs_sb);
2906                 goto querty_exit;
2907         }
2908
2909         if (!rc || !err_iov.iov_base) {
2910                 rc = -ENOENT;
2911                 goto querty_exit;
2912         }
2913
2914         err_buf = err_iov.iov_base;
2915         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2916             err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2917                 rc = -EINVAL;
2918                 goto querty_exit;
2919         }
2920
2921         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2922         if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2923             le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2924                 rc = -EINVAL;
2925                 goto querty_exit;
2926         }
2927
2928         /* open must fail on symlink - reset rc */
2929         rc = 0;
2930         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2931         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2932         print_len = le16_to_cpu(symlink->PrintNameLength);
2933         print_offset = le16_to_cpu(symlink->PrintNameOffset);
2934
2935         if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2936                 rc = -EINVAL;
2937                 goto querty_exit;
2938         }
2939
2940         if (err_iov.iov_len <
2941             SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2942                 rc = -EINVAL;
2943                 goto querty_exit;
2944         }
2945
2946         *target_path = cifs_strndup_from_utf16(
2947                                 (char *)symlink->PathBuffer + sub_offset,
2948                                 sub_len, true, cifs_sb->local_nls);
2949         if (!(*target_path)) {
2950                 rc = -ENOMEM;
2951                 goto querty_exit;
2952         }
2953         convert_delimiter(*target_path, '/');
2954         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2955
2956  querty_exit:
2957         cifs_dbg(FYI, "query symlink rc %d\n", rc);
2958         kfree(utf16_path);
2959         SMB2_open_free(&rqst[0]);
2960         SMB2_ioctl_free(&rqst[1]);
2961         SMB2_close_free(&rqst[2]);
2962         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2963         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2964         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2965         return rc;
2966 }
2967
2968 static struct cifs_ntsd *
2969 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2970                 const struct cifs_fid *cifsfid, u32 *pacllen)
2971 {
2972         struct cifs_ntsd *pntsd = NULL;
2973         unsigned int xid;
2974         int rc = -EOPNOTSUPP;
2975         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2976
2977         if (IS_ERR(tlink))
2978                 return ERR_CAST(tlink);
2979
2980         xid = get_xid();
2981         cifs_dbg(FYI, "trying to get acl\n");
2982
2983         rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2984                             cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2985         free_xid(xid);
2986
2987         cifs_put_tlink(tlink);
2988
2989         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2990         if (rc)
2991                 return ERR_PTR(rc);
2992         return pntsd;
2993
2994 }
2995
2996 static struct cifs_ntsd *
2997 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2998                 const char *path, u32 *pacllen)
2999 {
3000         struct cifs_ntsd *pntsd = NULL;
3001         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3002         unsigned int xid;
3003         int rc;
3004         struct cifs_tcon *tcon;
3005         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3006         struct cifs_fid fid;
3007         struct cifs_open_parms oparms;
3008         __le16 *utf16_path;
3009
3010         cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3011         if (IS_ERR(tlink))
3012                 return ERR_CAST(tlink);
3013
3014         tcon = tlink_tcon(tlink);
3015         xid = get_xid();
3016
3017         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3018         if (!utf16_path) {
3019                 rc = -ENOMEM;
3020                 free_xid(xid);
3021                 return ERR_PTR(rc);
3022         }
3023
3024         oparms.tcon = tcon;
3025         oparms.desired_access = READ_CONTROL;
3026         oparms.disposition = FILE_OPEN;
3027         oparms.create_options = cifs_create_options(cifs_sb, 0);
3028         oparms.fid = &fid;
3029         oparms.reconnect = false;
3030
3031         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3032         kfree(utf16_path);
3033         if (!rc) {
3034                 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3035                             fid.volatile_fid, (void **)&pntsd, pacllen);
3036                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3037         }
3038
3039         cifs_put_tlink(tlink);
3040         free_xid(xid);
3041
3042         cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3043         if (rc)
3044                 return ERR_PTR(rc);
3045         return pntsd;
3046 }
3047
3048 static int
3049 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3050                 struct inode *inode, const char *path, int aclflag)
3051 {
3052         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3053         unsigned int xid;
3054         int rc, access_flags = 0;
3055         struct cifs_tcon *tcon;
3056         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3057         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3058         struct cifs_fid fid;
3059         struct cifs_open_parms oparms;
3060         __le16 *utf16_path;
3061
3062         cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3063         if (IS_ERR(tlink))
3064                 return PTR_ERR(tlink);
3065
3066         tcon = tlink_tcon(tlink);
3067         xid = get_xid();
3068
3069         if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3070                 access_flags = WRITE_OWNER;
3071         else
3072                 access_flags = WRITE_DAC;
3073
3074         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3075         if (!utf16_path) {
3076                 rc = -ENOMEM;
3077                 free_xid(xid);
3078                 return rc;
3079         }
3080
3081         oparms.tcon = tcon;
3082         oparms.desired_access = access_flags;
3083         oparms.create_options = cifs_create_options(cifs_sb, 0);
3084         oparms.disposition = FILE_OPEN;
3085         oparms.path = path;
3086         oparms.fid = &fid;
3087         oparms.reconnect = false;
3088
3089         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
3090         kfree(utf16_path);
3091         if (!rc) {
3092                 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3093                             fid.volatile_fid, pnntsd, acllen, aclflag);
3094                 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3095         }
3096
3097         cifs_put_tlink(tlink);
3098         free_xid(xid);
3099         return rc;
3100 }
3101
3102 /* Retrieve an ACL from the server */
3103 static struct cifs_ntsd *
3104 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3105                                       struct inode *inode, const char *path,
3106                                       u32 *pacllen)
3107 {
3108         struct cifs_ntsd *pntsd = NULL;
3109         struct cifsFileInfo *open_file = NULL;
3110
3111         if (inode)
3112                 open_file = find_readable_file(CIFS_I(inode), true);
3113         if (!open_file)
3114                 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3115
3116         pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3117         cifsFileInfo_put(open_file);
3118         return pntsd;
3119 }
3120
3121 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3122                             loff_t offset, loff_t len, bool keep_size)
3123 {
3124         struct cifs_ses *ses = tcon->ses;
3125         struct inode *inode;
3126         struct cifsInodeInfo *cifsi;
3127         struct cifsFileInfo *cfile = file->private_data;
3128         struct file_zero_data_information fsctl_buf;
3129         long rc;
3130         unsigned int xid;
3131         __le64 eof;
3132
3133         xid = get_xid();
3134
3135         inode = d_inode(cfile->dentry);
3136         cifsi = CIFS_I(inode);
3137
3138         trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3139                               ses->Suid, offset, len);
3140
3141
3142         /* if file not oplocked can't be sure whether asking to extend size */
3143         if (!CIFS_CACHE_READ(cifsi))
3144                 if (keep_size == false) {
3145                         rc = -EOPNOTSUPP;
3146                         trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3147                                 tcon->tid, ses->Suid, offset, len, rc);
3148                         free_xid(xid);
3149                         return rc;
3150                 }
3151
3152         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3153
3154         fsctl_buf.FileOffset = cpu_to_le64(offset);
3155         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3156
3157         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3158                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3159                         (char *)&fsctl_buf,
3160                         sizeof(struct file_zero_data_information),
3161                         0, NULL, NULL);
3162         if (rc)
3163                 goto zero_range_exit;
3164
3165         /*
3166          * do we also need to change the size of the file?
3167          */
3168         if (keep_size == false && i_size_read(inode) < offset + len) {
3169                 eof = cpu_to_le64(offset + len);
3170                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3171                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3172         }
3173
3174  zero_range_exit:
3175         free_xid(xid);
3176         if (rc)
3177                 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3178                               ses->Suid, offset, len, rc);
3179         else
3180                 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3181                               ses->Suid, offset, len);
3182         return rc;
3183 }
3184
3185 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3186                             loff_t offset, loff_t len)
3187 {
3188         struct inode *inode;
3189         struct cifsFileInfo *cfile = file->private_data;
3190         struct file_zero_data_information fsctl_buf;
3191         long rc;
3192         unsigned int xid;
3193         __u8 set_sparse = 1;
3194
3195         xid = get_xid();
3196
3197         inode = d_inode(cfile->dentry);
3198
3199         /* Need to make file sparse, if not already, before freeing range. */
3200         /* Consider adding equivalent for compressed since it could also work */
3201         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3202                 rc = -EOPNOTSUPP;
3203                 free_xid(xid);
3204                 return rc;
3205         }
3206
3207         cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3208
3209         fsctl_buf.FileOffset = cpu_to_le64(offset);
3210         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3211
3212         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3213                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3214                         true /* is_fctl */, (char *)&fsctl_buf,
3215                         sizeof(struct file_zero_data_information),
3216                         CIFSMaxBufSize, NULL, NULL);
3217         free_xid(xid);
3218         return rc;
3219 }
3220
3221 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3222                             loff_t off, loff_t len, bool keep_size)
3223 {
3224         struct inode *inode;
3225         struct cifsInodeInfo *cifsi;
3226         struct cifsFileInfo *cfile = file->private_data;
3227         long rc = -EOPNOTSUPP;
3228         unsigned int xid;
3229         __le64 eof;
3230
3231         xid = get_xid();
3232
3233         inode = d_inode(cfile->dentry);
3234         cifsi = CIFS_I(inode);
3235
3236         trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3237                                 tcon->ses->Suid, off, len);
3238         /* if file not oplocked can't be sure whether asking to extend size */
3239         if (!CIFS_CACHE_READ(cifsi))
3240                 if (keep_size == false) {
3241                         trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3242                                 tcon->tid, tcon->ses->Suid, off, len, rc);
3243                         free_xid(xid);
3244                         return rc;
3245                 }
3246
3247         /*
3248          * Extending the file
3249          */
3250         if ((keep_size == false) && i_size_read(inode) < off + len) {
3251                 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3252                         smb2_set_sparse(xid, tcon, cfile, inode, false);
3253
3254                 eof = cpu_to_le64(off + len);
3255                 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3256                                   cfile->fid.volatile_fid, cfile->pid, &eof);
3257                 if (rc == 0) {
3258                         cifsi->server_eof = off + len;
3259                         cifs_setsize(inode, off + len);
3260                         cifs_truncate_page(inode->i_mapping, inode->i_size);
3261                         truncate_setsize(inode, off + len);
3262                 }
3263                 goto out;
3264         }
3265
3266         /*
3267          * Files are non-sparse by default so falloc may be a no-op
3268          * Must check if file sparse. If not sparse, and since we are not
3269          * extending then no need to do anything since file already allocated
3270          */
3271         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3272                 rc = 0;
3273                 goto out;
3274         }
3275
3276         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3277                 /*
3278                  * Check if falloc starts within first few pages of file
3279                  * and ends within a few pages of the end of file to
3280                  * ensure that most of file is being forced to be
3281                  * fallocated now. If so then setting whole file sparse
3282                  * ie potentially making a few extra pages at the beginning
3283                  * or end of the file non-sparse via set_sparse is harmless.
3284                  */
3285                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3286                         rc = -EOPNOTSUPP;
3287                         goto out;
3288                 }
3289         }
3290
3291         smb2_set_sparse(xid, tcon, cfile, inode, false);
3292         rc = 0;
3293
3294 out:
3295         if (rc)
3296                 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3297                                 tcon->ses->Suid, off, len, rc);
3298         else
3299                 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3300                                 tcon->ses->Suid, off, len);
3301
3302         free_xid(xid);
3303         return rc;
3304 }
3305
3306 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3307 {
3308         struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3309         struct cifsInodeInfo *cifsi;
3310         struct inode *inode;
3311         int rc = 0;
3312         struct file_allocated_range_buffer in_data, *out_data = NULL;
3313         u32 out_data_len;
3314         unsigned int xid;
3315
3316         if (whence != SEEK_HOLE && whence != SEEK_DATA)
3317                 return generic_file_llseek(file, offset, whence);
3318
3319         inode = d_inode(cfile->dentry);
3320         cifsi = CIFS_I(inode);
3321
3322         if (offset < 0 || offset >= i_size_read(inode))
3323                 return -ENXIO;
3324
3325         xid = get_xid();
3326         /*
3327          * We need to be sure that all dirty pages are written as they
3328          * might fill holes on the server.
3329          * Note that we also MUST flush any written pages since at least
3330          * some servers (Windows2016) will not reflect recent writes in
3331          * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3332          */
3333         wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3334         if (wrcfile) {
3335                 filemap_write_and_wait(inode->i_mapping);
3336                 smb2_flush_file(xid, tcon, &wrcfile->fid);
3337                 cifsFileInfo_put(wrcfile);
3338         }
3339
3340         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3341                 if (whence == SEEK_HOLE)
3342                         offset = i_size_read(inode);
3343                 goto lseek_exit;
3344         }
3345
3346         in_data.file_offset = cpu_to_le64(offset);
3347         in_data.length = cpu_to_le64(i_size_read(inode));
3348
3349         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3350                         cfile->fid.volatile_fid,
3351                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3352                         (char *)&in_data, sizeof(in_data),
3353                         sizeof(struct file_allocated_range_buffer),
3354                         (char **)&out_data, &out_data_len);
3355         if (rc == -E2BIG)
3356                 rc = 0;
3357         if (rc)
3358                 goto lseek_exit;
3359
3360         if (whence == SEEK_HOLE && out_data_len == 0)
3361                 goto lseek_exit;
3362
3363         if (whence == SEEK_DATA && out_data_len == 0) {
3364                 rc = -ENXIO;
3365                 goto lseek_exit;
3366         }
3367
3368         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3369                 rc = -EINVAL;
3370                 goto lseek_exit;
3371         }
3372         if (whence == SEEK_DATA) {
3373                 offset = le64_to_cpu(out_data->file_offset);
3374                 goto lseek_exit;
3375         }
3376         if (offset < le64_to_cpu(out_data->file_offset))
3377                 goto lseek_exit;
3378
3379         offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3380
3381  lseek_exit:
3382         free_xid(xid);
3383         kfree(out_data);
3384         if (!rc)
3385                 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3386         else
3387                 return rc;
3388 }
3389
3390 static int smb3_fiemap(struct cifs_tcon *tcon,
3391                        struct cifsFileInfo *cfile,
3392                        struct fiemap_extent_info *fei, u64 start, u64 len)
3393 {
3394         unsigned int xid;
3395         struct file_allocated_range_buffer in_data, *out_data;
3396         u32 out_data_len;
3397         int i, num, rc, flags, last_blob;
3398         u64 next;
3399
3400         if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3401                 return -EBADR;
3402
3403         xid = get_xid();
3404  again:
3405         in_data.file_offset = cpu_to_le64(start);
3406         in_data.length = cpu_to_le64(len);
3407
3408         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3409                         cfile->fid.volatile_fid,
3410                         FSCTL_QUERY_ALLOCATED_RANGES, true,
3411                         (char *)&in_data, sizeof(in_data),
3412                         1024 * sizeof(struct file_allocated_range_buffer),
3413                         (char **)&out_data, &out_data_len);
3414         if (rc == -E2BIG) {
3415                 last_blob = 0;
3416                 rc = 0;
3417         } else
3418                 last_blob = 1;
3419         if (rc)
3420                 goto out;
3421
3422         if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3423                 rc = -EINVAL;
3424                 goto out;
3425         }
3426         if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3427                 rc = -EINVAL;
3428                 goto out;
3429         }
3430
3431         num = out_data_len / sizeof(struct file_allocated_range_buffer);
3432         for (i = 0; i < num; i++) {
3433                 flags = 0;
3434                 if (i == num - 1 && last_blob)
3435                         flags |= FIEMAP_EXTENT_LAST;
3436
3437                 rc = fiemap_fill_next_extent(fei,
3438                                 le64_to_cpu(out_data[i].file_offset),
3439                                 le64_to_cpu(out_data[i].file_offset),
3440                                 le64_to_cpu(out_data[i].length),
3441                                 flags);
3442                 if (rc < 0)
3443                         goto out;
3444                 if (rc == 1) {
3445                         rc = 0;
3446                         goto out;
3447                 }
3448         }
3449
3450         if (!last_blob) {
3451                 next = le64_to_cpu(out_data[num - 1].file_offset) +
3452                   le64_to_cpu(out_data[num - 1].length);
3453                 len = len - (next - start);
3454                 start = next;
3455                 goto again;
3456         }
3457
3458  out:
3459         free_xid(xid);
3460         kfree(out_data);
3461         return rc;
3462 }
3463
3464 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3465                            loff_t off, loff_t len)
3466 {
3467         /* KEEP_SIZE already checked for by do_fallocate */
3468         if (mode & FALLOC_FL_PUNCH_HOLE)
3469                 return smb3_punch_hole(file, tcon, off, len);
3470         else if (mode & FALLOC_FL_ZERO_RANGE) {
3471                 if (mode & FALLOC_FL_KEEP_SIZE)
3472                         return smb3_zero_range(file, tcon, off, len, true);
3473                 return smb3_zero_range(file, tcon, off, len, false);
3474         } else if (mode == FALLOC_FL_KEEP_SIZE)
3475                 return smb3_simple_falloc(file, tcon, off, len, true);
3476         else if (mode == 0)
3477                 return smb3_simple_falloc(file, tcon, off, len, false);
3478
3479         return -EOPNOTSUPP;
3480 }
3481
3482 static void
3483 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3484                       struct cifsInodeInfo *cinode, __u32 oplock,
3485                       unsigned int epoch, bool *purge_cache)
3486 {
3487         server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3488 }
3489
3490 static void
3491 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3492                        unsigned int epoch, bool *purge_cache);
3493
3494 static void
3495 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3496                        struct cifsInodeInfo *cinode, __u32 oplock,
3497                        unsigned int epoch, bool *purge_cache)
3498 {
3499         unsigned int old_state = cinode->oplock;
3500         unsigned int old_epoch = cinode->epoch;
3501         unsigned int new_state;
3502
3503         if (epoch > old_epoch) {
3504                 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3505                 cinode->epoch = epoch;
3506         }
3507
3508         new_state = cinode->oplock;
3509         *purge_cache = false;
3510
3511         if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3512             (new_state & CIFS_CACHE_READ_FLG) == 0)
3513                 *purge_cache = true;
3514         else if (old_state == new_state && (epoch - old_epoch > 1))
3515                 *purge_cache = true;
3516 }
3517
3518 static void
3519 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3520                       unsigned int epoch, bool *purge_cache)
3521 {
3522         oplock &= 0xFF;
3523         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3524                 return;
3525         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3526                 cinode->oplock = CIFS_CACHE_RHW_FLG;
3527                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3528                          &cinode->vfs_inode);
3529         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3530                 cinode->oplock = CIFS_CACHE_RW_FLG;
3531                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3532                          &cinode->vfs_inode);
3533         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3534                 cinode->oplock = CIFS_CACHE_READ_FLG;
3535                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3536                          &cinode->vfs_inode);
3537         } else
3538                 cinode->oplock = 0;
3539 }
3540
3541 static void
3542 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3543                        unsigned int epoch, bool *purge_cache)
3544 {
3545         char message[5] = {0};
3546         unsigned int new_oplock = 0;
3547
3548         oplock &= 0xFF;
3549         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3550                 return;
3551
3552         /* Check if the server granted an oplock rather than a lease */
3553         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3554                 return smb2_set_oplock_level(cinode, oplock, epoch,
3555                                              purge_cache);
3556
3557         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3558                 new_oplock |= CIFS_CACHE_READ_FLG;
3559                 strcat(message, "R");
3560         }
3561         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3562                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3563                 strcat(message, "H");
3564         }
3565         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3566                 new_oplock |= CIFS_CACHE_WRITE_FLG;
3567                 strcat(message, "W");
3568         }
3569         if (!new_oplock)
3570                 strncpy(message, "None", sizeof(message));
3571
3572         cinode->oplock = new_oplock;
3573         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3574                  &cinode->vfs_inode);
3575 }
3576
3577 static void
3578 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3579                       unsigned int epoch, bool *purge_cache)
3580 {
3581         unsigned int old_oplock = cinode->oplock;
3582
3583         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3584
3585         if (purge_cache) {
3586                 *purge_cache = false;
3587                 if (old_oplock == CIFS_CACHE_READ_FLG) {
3588                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3589                             (epoch - cinode->epoch > 0))
3590                                 *purge_cache = true;
3591                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3592                                  (epoch - cinode->epoch > 1))
3593                                 *purge_cache = true;
3594                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3595                                  (epoch - cinode->epoch > 1))
3596                                 *purge_cache = true;
3597                         else if (cinode->oplock == 0 &&
3598                                  (epoch - cinode->epoch > 0))
3599                                 *purge_cache = true;
3600                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3601                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3602                             (epoch - cinode->epoch > 0))
3603                                 *purge_cache = true;
3604                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3605                                  (epoch - cinode->epoch > 1))
3606                                 *purge_cache = true;
3607                 }
3608                 cinode->epoch = epoch;
3609         }
3610 }
3611
3612 static bool
3613 smb2_is_read_op(__u32 oplock)
3614 {
3615         return oplock == SMB2_OPLOCK_LEVEL_II;
3616 }
3617
3618 static bool
3619 smb21_is_read_op(__u32 oplock)
3620 {
3621         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3622                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3623 }
3624
3625 static __le32
3626 map_oplock_to_lease(u8 oplock)
3627 {
3628         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3629                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3630         else if (oplock == SMB2_OPLOCK_LEVEL_II)
3631                 return SMB2_LEASE_READ_CACHING;
3632         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3633                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3634                        SMB2_LEASE_WRITE_CACHING;
3635         return 0;
3636 }
3637
3638 static char *
3639 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3640 {
3641         struct create_lease *buf;
3642
3643         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3644         if (!buf)
3645                 return NULL;
3646
3647         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3648         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3649
3650         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3651                                         (struct create_lease, lcontext));
3652         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3653         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3654                                 (struct create_lease, Name));
3655         buf->ccontext.NameLength = cpu_to_le16(4);
3656         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3657         buf->Name[0] = 'R';
3658         buf->Name[1] = 'q';
3659         buf->Name[2] = 'L';
3660         buf->Name[3] = 's';
3661         return (char *)buf;
3662 }
3663
3664 static char *
3665 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3666 {
3667         struct create_lease_v2 *buf;
3668
3669         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3670         if (!buf)
3671                 return NULL;
3672
3673         memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3674         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3675
3676         buf->ccontext.DataOffset = cpu_to_le16(offsetof
3677                                         (struct create_lease_v2, lcontext));
3678         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3679         buf->ccontext.NameOffset = cpu_to_le16(offsetof
3680                                 (struct create_lease_v2, Name));
3681         buf->ccontext.NameLength = cpu_to_le16(4);
3682         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3683         buf->Name[0] = 'R';
3684         buf->Name[1] = 'q';
3685         buf->Name[2] = 'L';
3686         buf->Name[3] = 's';
3687         return (char *)buf;
3688 }
3689
3690 static __u8
3691 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3692 {
3693         struct create_lease *lc = (struct create_lease *)buf;
3694
3695         *epoch = 0; /* not used */
3696         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3697                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3698         return le32_to_cpu(lc->lcontext.LeaseState);
3699 }
3700
3701 static __u8
3702 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3703 {
3704         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3705
3706         *epoch = le16_to_cpu(lc->lcontext.Epoch);
3707         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3708                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3709         if (lease_key)
3710                 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3711         return le32_to_cpu(lc->lcontext.LeaseState);
3712 }
3713
3714 static unsigned int
3715 smb2_wp_retry_size(struct inode *inode)
3716 {
3717         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3718                      SMB2_MAX_BUFFER_SIZE);
3719 }
3720
3721 static bool
3722 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3723 {
3724         return !cfile->invalidHandle;
3725 }
3726
3727 static void
3728 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3729                    struct smb_rqst *old_rq, __le16 cipher_type)
3730 {
3731         struct smb2_sync_hdr *shdr =
3732                         (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3733
3734         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3735         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3736         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3737         tr_hdr->Flags = cpu_to_le16(0x01);
3738         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3739                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3740         else
3741                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3742         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3743 }
3744
3745 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3746  * stack object as buf.
3747  */
3748 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3749                                    unsigned int buflen)
3750 {
3751         void *addr;
3752         /*
3753          * VMAP_STACK (at least) puts stack into the vmalloc address space
3754          */
3755         if (is_vmalloc_addr(buf))
3756                 addr = vmalloc_to_page(buf);
3757         else
3758                 addr = virt_to_page(buf);
3759         sg_set_page(sg, addr, buflen, offset_in_page(buf));
3760 }
3761
3762 /* Assumes the first rqst has a transform header as the first iov.
3763  * I.e.
3764  * rqst[0].rq_iov[0]  is transform header
3765  * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3766  * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3767  */
3768 static struct scatterlist *
3769 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3770 {
3771         unsigned int sg_len;
3772         struct scatterlist *sg;
3773         unsigned int i;
3774         unsigned int j;
3775         unsigned int idx = 0;
3776         int skip;
3777
3778         sg_len = 1;
3779         for (i = 0; i < num_rqst; i++)
3780                 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3781
3782         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3783         if (!sg)
3784                 return NULL;
3785
3786         sg_init_table(sg, sg_len);
3787         for (i = 0; i < num_rqst; i++) {
3788                 for (j = 0; j < rqst[i].rq_nvec; j++) {
3789                         /*
3790                          * The first rqst has a transform header where the
3791                          * first 20 bytes are not part of the encrypted blob
3792                          */
3793                         skip = (i == 0) && (j == 0) ? 20 : 0;
3794                         smb2_sg_set_buf(&sg[idx++],
3795                                         rqst[i].rq_iov[j].iov_base + skip,
3796                                         rqst[i].rq_iov[j].iov_len - skip);
3797                         }
3798
3799                 for (j = 0; j < rqst[i].rq_npages; j++) {
3800                         unsigned int len, offset;
3801
3802                         rqst_page_get_length(&rqst[i], j, &len, &offset);
3803                         sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3804                 }
3805         }
3806         smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3807         return sg;
3808 }
3809
3810 static int
3811 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3812 {
3813         struct cifs_ses *ses;
3814         u8 *ses_enc_key;
3815
3816         spin_lock(&cifs_tcp_ses_lock);
3817         list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3818                 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3819                         if (ses->Suid == ses_id) {
3820                                 ses_enc_key = enc ? ses->smb3encryptionkey :
3821                                         ses->smb3decryptionkey;
3822                                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3823                                 spin_unlock(&cifs_tcp_ses_lock);
3824                                 return 0;
3825                         }
3826                 }
3827         }
3828         spin_unlock(&cifs_tcp_ses_lock);
3829
3830         return 1;
3831 }
3832 /*
3833  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3834  * iov[0]   - transform header (associate data),
3835  * iov[1-N] - SMB2 header and pages - data to encrypt.
3836  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3837  * untouched.
3838  */
3839 static int
3840 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3841               struct smb_rqst *rqst, int enc)
3842 {
3843         struct smb2_transform_hdr *tr_hdr =
3844                 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3845         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3846         int rc = 0;
3847         struct scatterlist *sg;
3848         u8 sign[SMB2_SIGNATURE_SIZE] = {};
3849         u8 key[SMB3_SIGN_KEY_SIZE];
3850         struct aead_request *req;
3851         char *iv;
3852         unsigned int iv_len;
3853         DECLARE_CRYPTO_WAIT(wait);
3854         struct crypto_aead *tfm;
3855         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3856
3857         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3858         if (rc) {
3859                 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3860                          enc ? "en" : "de");
3861                 return 0;
3862         }
3863
3864         rc = smb3_crypto_aead_allocate(server);
3865         if (rc) {
3866                 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3867                 return rc;
3868         }
3869
3870         tfm = enc ? server->secmech.ccmaesencrypt :
3871                                                 server->secmech.ccmaesdecrypt;
3872         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3873         if (rc) {
3874                 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3875                 return rc;
3876         }
3877
3878         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3879         if (rc) {
3880                 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3881                 return rc;
3882         }
3883
3884         req = aead_request_alloc(tfm, GFP_KERNEL);
3885         if (!req) {
3886                 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3887                 return -ENOMEM;
3888         }
3889
3890         if (!enc) {
3891                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3892                 crypt_len += SMB2_SIGNATURE_SIZE;
3893         }
3894
3895         sg = init_sg(num_rqst, rqst, sign);
3896         if (!sg) {
3897                 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3898                 rc = -ENOMEM;
3899                 goto free_req;
3900         }
3901
3902         iv_len = crypto_aead_ivsize(tfm);
3903         iv = kzalloc(iv_len, GFP_KERNEL);
3904         if (!iv) {
3905                 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3906                 rc = -ENOMEM;
3907                 goto free_sg;
3908         }
3909
3910         if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3911                 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3912         else {
3913                 iv[0] = 3;
3914                 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3915         }
3916
3917         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3918         aead_request_set_ad(req, assoc_data_len);
3919
3920         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3921                                   crypto_req_done, &wait);
3922
3923         rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3924                                 : crypto_aead_decrypt(req), &wait);
3925
3926         if (!rc && enc)
3927                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3928
3929         kfree(iv);
3930 free_sg:
3931         kfree(sg);
3932 free_req:
3933         kfree(req);
3934         return rc;
3935 }
3936
3937 void
3938 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3939 {
3940         int i, j;
3941
3942         for (i = 0; i < num_rqst; i++) {
3943                 if (rqst[i].rq_pages) {
3944                         for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3945                                 put_page(rqst[i].rq_pages[j]);
3946                         kfree(rqst[i].rq_pages);
3947                 }
3948         }
3949 }
3950
3951 /*
3952  * This function will initialize new_rq and encrypt the content.
3953  * The first entry, new_rq[0], only contains a single iov which contains
3954  * a smb2_transform_hdr and is pre-allocated by the caller.
3955  * This function then populates new_rq[1+] with the content from olq_rq[0+].
3956  *
3957  * The end result is an array of smb_rqst structures where the first structure
3958  * only contains a single iov for the transform header which we then can pass
3959  * to crypt_message().
3960  *
3961  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
3962  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3963  */
3964 static int
3965 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3966                        struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3967 {
3968         struct page **pages;
3969         struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3970         unsigned int npages;
3971         unsigned int orig_len = 0;
3972         int i, j;
3973         int rc = -ENOMEM;
3974
3975         for (i = 1; i < num_rqst; i++) {
3976                 npages = old_rq[i - 1].rq_npages;
3977                 pages = kmalloc_array(npages, sizeof(struct page *),
3978                                       GFP_KERNEL);
3979                 if (!pages)
3980                         goto err_free;
3981
3982                 new_rq[i].rq_pages = pages;
3983                 new_rq[i].rq_npages = npages;
3984                 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3985                 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3986                 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3987                 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3988                 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3989
3990                 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3991
3992                 for (j = 0; j < npages; j++) {
3993                         pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3994                         if (!pages[j])
3995                                 goto err_free;
3996                 }
3997
3998                 /* copy pages form the old */
3999                 for (j = 0; j < npages; j++) {
4000                         char *dst, *src;
4001                         unsigned int offset, len;
4002
4003                         rqst_page_get_length(&new_rq[i], j, &len, &offset);
4004
4005                         dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4006                         src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4007
4008                         memcpy(dst, src, len);
4009                         kunmap(new_rq[i].rq_pages[j]);
4010                         kunmap(old_rq[i - 1].rq_pages[j]);
4011                 }
4012         }
4013
4014         /* fill the 1st iov with a transform header */
4015         fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4016
4017         rc = crypt_message(server, num_rqst, new_rq, 1);
4018         cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4019         if (rc)
4020                 goto err_free;
4021
4022         return rc;
4023
4024 err_free:
4025         smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4026         return rc;
4027 }
4028
4029 static int
4030 smb3_is_transform_hdr(void *buf)
4031 {
4032         struct smb2_transform_hdr *trhdr = buf;
4033
4034         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4035 }
4036
4037 static int
4038 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4039                  unsigned int buf_data_size, struct page **pages,
4040                  unsigned int npages, unsigned int page_data_size)
4041 {
4042         struct kvec iov[2];
4043         struct smb_rqst rqst = {NULL};
4044         int rc;
4045
4046         iov[0].iov_base = buf;
4047         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4048         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4049         iov[1].iov_len = buf_data_size;
4050
4051         rqst.rq_iov = iov;
4052         rqst.rq_nvec = 2;
4053         rqst.rq_pages = pages;
4054         rqst.rq_npages = npages;
4055         rqst.rq_pagesz = PAGE_SIZE;
4056         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4057
4058         rc = crypt_message(server, 1, &rqst, 0);
4059         cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4060
4061         if (rc)
4062                 return rc;
4063
4064         memmove(buf, iov[1].iov_base, buf_data_size);
4065
4066         server->total_read = buf_data_size + page_data_size;
4067
4068         return rc;
4069 }
4070
4071 static int
4072 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4073                      unsigned int npages, unsigned int len)
4074 {
4075         int i;
4076         int length;
4077
4078         for (i = 0; i < npages; i++) {
4079                 struct page *page = pages[i];
4080                 size_t n;
4081
4082                 n = len;
4083                 if (len >= PAGE_SIZE) {
4084                         /* enough data to fill the page */
4085                         n = PAGE_SIZE;
4086                         len -= n;
4087                 } else {
4088                         zero_user(page, len, PAGE_SIZE - len);
4089                         len = 0;
4090                 }
4091                 length = cifs_read_page_from_socket(server, page, 0, n);
4092                 if (length < 0)
4093                         return length;
4094                 server->total_read += length;
4095         }
4096
4097         return 0;
4098 }
4099
4100 static int
4101 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4102                unsigned int cur_off, struct bio_vec **page_vec)
4103 {
4104         struct bio_vec *bvec;
4105         int i;
4106
4107         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4108         if (!bvec)
4109                 return -ENOMEM;
4110
4111         for (i = 0; i < npages; i++) {
4112                 bvec[i].bv_page = pages[i];
4113                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4114                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4115                 data_size -= bvec[i].bv_len;
4116         }
4117
4118         if (data_size != 0) {
4119                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4120                 kfree(bvec);
4121                 return -EIO;
4122         }
4123
4124         *page_vec = bvec;
4125         return 0;
4126 }
4127
4128 static int
4129 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4130                  char *buf, unsigned int buf_len, struct page **pages,
4131                  unsigned int npages, unsigned int page_data_size)
4132 {
4133         unsigned int data_offset;
4134         unsigned int data_len;
4135         unsigned int cur_off;
4136         unsigned int cur_page_idx;
4137         unsigned int pad_len;
4138         struct cifs_readdata *rdata = mid->callback_data;
4139         struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4140         struct bio_vec *bvec = NULL;
4141         struct iov_iter iter;
4142         struct kvec iov;
4143         int length;
4144         bool use_rdma_mr = false;
4145
4146         if (shdr->Command != SMB2_READ) {
4147                 cifs_server_dbg(VFS, "only big read responses are supported\n");
4148                 return -ENOTSUPP;
4149         }
4150
4151         if (server->ops->is_session_expired &&
4152             server->ops->is_session_expired(buf)) {
4153                 cifs_reconnect(server);
4154                 wake_up(&server->response_q);
4155                 return -1;
4156         }
4157
4158         if (server->ops->is_status_pending &&
4159                         server->ops->is_status_pending(buf, server))
4160                 return -1;
4161
4162         /* set up first two iov to get credits */
4163         rdata->iov[0].iov_base = buf;
4164         rdata->iov[0].iov_len = 0;
4165         rdata->iov[1].iov_base = buf;
4166         rdata->iov[1].iov_len =
4167                 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4168         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4169                  rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4170         cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4171                  rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4172
4173         rdata->result = server->ops->map_error(buf, true);
4174         if (rdata->result != 0) {
4175                 cifs_dbg(FYI, "%s: server returned error %d\n",
4176                          __func__, rdata->result);
4177                 /* normal error on read response */
4178                 dequeue_mid(mid, false);
4179                 return 0;
4180         }
4181
4182         data_offset = server->ops->read_data_offset(buf);
4183 #ifdef CONFIG_CIFS_SMB_DIRECT
4184         use_rdma_mr = rdata->mr;
4185 #endif
4186         data_len = server->ops->read_data_length(buf, use_rdma_mr);
4187
4188         if (data_offset < server->vals->read_rsp_size) {
4189                 /*
4190                  * win2k8 sometimes sends an offset of 0 when the read
4191                  * is beyond the EOF. Treat it as if the data starts just after
4192                  * the header.
4193                  */
4194                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4195                          __func__, data_offset);
4196                 data_offset = server->vals->read_rsp_size;
4197         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4198                 /* data_offset is beyond the end of smallbuf */
4199                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4200                          __func__, data_offset);
4201                 rdata->result = -EIO;
4202                 dequeue_mid(mid, rdata->result);
4203                 return 0;
4204         }
4205
4206         pad_len = data_offset - server->vals->read_rsp_size;
4207
4208         if (buf_len <= data_offset) {
4209                 /* read response payload is in pages */
4210                 cur_page_idx = pad_len / PAGE_SIZE;
4211                 cur_off = pad_len % PAGE_SIZE;
4212
4213                 if (cur_page_idx != 0) {
4214                         /* data offset is beyond the 1st page of response */
4215                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4216                                  __func__, data_offset);
4217                         rdata->result = -EIO;
4218                         dequeue_mid(mid, rdata->result);
4219                         return 0;
4220                 }
4221
4222                 if (data_len > page_data_size - pad_len) {
4223                         /* data_len is corrupt -- discard frame */
4224                         rdata->result = -EIO;
4225                         dequeue_mid(mid, rdata->result);
4226                         return 0;
4227                 }
4228
4229                 rdata->result = init_read_bvec(pages, npages, page_data_size,
4230                                                cur_off, &bvec);
4231                 if (rdata->result != 0) {
4232                         dequeue_mid(mid, rdata->result);
4233                         return 0;
4234                 }
4235
4236                 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4237         } else if (buf_len >= data_offset + data_len) {
4238                 /* read response payload is in buf */
4239                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4240                 iov.iov_base = buf + data_offset;
4241                 iov.iov_len = data_len;
4242                 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4243         } else {
4244                 /* read response payload cannot be in both buf and pages */
4245                 WARN_ONCE(1, "buf can not contain only a part of read data");
4246                 rdata->result = -EIO;
4247                 dequeue_mid(mid, rdata->result);
4248                 return 0;
4249         }
4250
4251         length = rdata->copy_into_pages(server, rdata, &iter);
4252
4253         kfree(bvec);
4254
4255         if (length < 0)
4256                 return length;
4257
4258         dequeue_mid(mid, false);
4259         return length;
4260 }
4261
4262 struct smb2_decrypt_work {
4263         struct work_struct decrypt;
4264         struct TCP_Server_Info *server;
4265         struct page **ppages;
4266         char *buf;
4267         unsigned int npages;
4268         unsigned int len;
4269 };
4270
4271
4272 static void smb2_decrypt_offload(struct work_struct *work)
4273 {
4274         struct smb2_decrypt_work *dw = container_of(work,
4275                                 struct smb2_decrypt_work, decrypt);
4276         int i, rc;
4277         struct mid_q_entry *mid;
4278
4279         rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4280                               dw->ppages, dw->npages, dw->len);
4281         if (rc) {
4282                 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4283                 goto free_pages;
4284         }
4285
4286         dw->server->lstrp = jiffies;
4287         mid = smb2_find_mid(dw->server, dw->buf);
4288         if (mid == NULL)
4289                 cifs_dbg(FYI, "mid not found\n");
4290         else {
4291                 mid->decrypted = true;
4292                 rc = handle_read_data(dw->server, mid, dw->buf,
4293                                       dw->server->vals->read_rsp_size,
4294                                       dw->ppages, dw->npages, dw->len);
4295                 mid->callback(mid);
4296                 cifs_mid_q_entry_release(mid);
4297         }
4298
4299 free_pages:
4300         for (i = dw->npages-1; i >= 0; i--)
4301                 put_page(dw->ppages[i]);
4302
4303         kfree(dw->ppages);
4304         cifs_small_buf_release(dw->buf);
4305         kfree(dw);
4306 }
4307
4308
4309 static int
4310 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4311                        int *num_mids)
4312 {
4313         char *buf = server->smallbuf;
4314         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4315         unsigned int npages;
4316         struct page **pages;
4317         unsigned int len;
4318         unsigned int buflen = server->pdu_size;
4319         int rc;
4320         int i = 0;
4321         struct smb2_decrypt_work *dw;
4322
4323         *num_mids = 1;
4324         len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4325                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4326
4327         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4328         if (rc < 0)
4329                 return rc;
4330         server->total_read += rc;
4331
4332         len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4333                 server->vals->read_rsp_size;
4334         npages = DIV_ROUND_UP(len, PAGE_SIZE);
4335
4336         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4337         if (!pages) {
4338                 rc = -ENOMEM;
4339                 goto discard_data;
4340         }
4341
4342         for (; i < npages; i++) {
4343                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4344                 if (!pages[i]) {
4345                         rc = -ENOMEM;
4346                         goto discard_data;
4347                 }
4348         }
4349
4350         /* read read data into pages */
4351         rc = read_data_into_pages(server, pages, npages, len);
4352         if (rc)
4353                 goto free_pages;
4354
4355         rc = cifs_discard_remaining_data(server);
4356         if (rc)
4357                 goto free_pages;
4358
4359         /*
4360          * For large reads, offload to different thread for better performance,
4361          * use more cores decrypting which can be expensive
4362          */
4363
4364         if ((server->min_offload) && (server->in_flight > 1) &&
4365             (server->pdu_size >= server->min_offload)) {
4366                 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4367                 if (dw == NULL)
4368                         goto non_offloaded_decrypt;
4369
4370                 dw->buf = server->smallbuf;
4371                 server->smallbuf = (char *)cifs_small_buf_get();
4372
4373                 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4374
4375                 dw->npages = npages;
4376                 dw->server = server;
4377                 dw->ppages = pages;
4378                 dw->len = len;
4379                 queue_work(decrypt_wq, &dw->decrypt);
4380                 *num_mids = 0; /* worker thread takes care of finding mid */
4381                 return -1;
4382         }
4383
4384 non_offloaded_decrypt:
4385         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4386                               pages, npages, len);
4387         if (rc)
4388                 goto free_pages;
4389
4390         *mid = smb2_find_mid(server, buf);
4391         if (*mid == NULL)
4392                 cifs_dbg(FYI, "mid not found\n");
4393         else {
4394                 cifs_dbg(FYI, "mid found\n");
4395                 (*mid)->decrypted = true;
4396                 rc = handle_read_data(server, *mid, buf,
4397                                       server->vals->read_rsp_size,
4398                                       pages, npages, len);
4399         }
4400
4401 free_pages:
4402         for (i = i - 1; i >= 0; i--)
4403                 put_page(pages[i]);
4404         kfree(pages);
4405         return rc;
4406 discard_data:
4407         cifs_discard_remaining_data(server);
4408         goto free_pages;
4409 }
4410
4411 static int
4412 receive_encrypted_standard(struct TCP_Server_Info *server,
4413                            struct mid_q_entry **mids, char **bufs,
4414                            int *num_mids)
4415 {
4416         int ret, length;
4417         char *buf = server->smallbuf;
4418         struct smb2_sync_hdr *shdr;
4419         unsigned int pdu_length = server->pdu_size;
4420         unsigned int buf_size;
4421         struct mid_q_entry *mid_entry;
4422         int next_is_large;
4423         char *next_buffer = NULL;
4424
4425         *num_mids = 0;
4426
4427         /* switch to large buffer if too big for a small one */
4428         if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4429                 server->large_buf = true;
4430                 memcpy(server->bigbuf, buf, server->total_read);
4431                 buf = server->bigbuf;
4432         }
4433
4434         /* now read the rest */
4435         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4436                                 pdu_length - HEADER_SIZE(server) + 1);
4437         if (length < 0)
4438                 return length;
4439         server->total_read += length;
4440
4441         buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4442         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4443         if (length)
4444                 return length;
4445
4446         next_is_large = server->large_buf;
4447 one_more:
4448         shdr = (struct smb2_sync_hdr *)buf;
4449         if (shdr->NextCommand) {
4450                 if (next_is_large)
4451                         next_buffer = (char *)cifs_buf_get();
4452                 else
4453                         next_buffer = (char *)cifs_small_buf_get();
4454                 memcpy(next_buffer,
4455                        buf + le32_to_cpu(shdr->NextCommand),
4456                        pdu_length - le32_to_cpu(shdr->NextCommand));
4457         }
4458
4459         mid_entry = smb2_find_mid(server, buf);
4460         if (mid_entry == NULL)
4461                 cifs_dbg(FYI, "mid not found\n");
4462         else {
4463                 cifs_dbg(FYI, "mid found\n");
4464                 mid_entry->decrypted = true;
4465                 mid_entry->resp_buf_size = server->pdu_size;
4466         }
4467
4468         if (*num_mids >= MAX_COMPOUND) {
4469                 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4470                 return -1;
4471         }
4472         bufs[*num_mids] = buf;
4473         mids[(*num_mids)++] = mid_entry;
4474
4475         if (mid_entry && mid_entry->handle)
4476                 ret = mid_entry->handle(server, mid_entry);
4477         else
4478                 ret = cifs_handle_standard(server, mid_entry);
4479
4480         if (ret == 0 && shdr->NextCommand) {
4481                 pdu_length -= le32_to_cpu(shdr->NextCommand);
4482                 server->large_buf = next_is_large;
4483                 if (next_is_large)
4484                         server->bigbuf = buf = next_buffer;
4485                 else
4486                         server->smallbuf = buf = next_buffer;
4487                 goto one_more;
4488         } else if (ret != 0) {
4489                 /*
4490                  * ret != 0 here means that we didn't get to handle_mid() thus
4491                  * server->smallbuf and server->bigbuf are still valid. We need
4492                  * to free next_buffer because it is not going to be used
4493                  * anywhere.
4494                  */
4495                 if (next_is_large)
4496                         free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4497                 else
4498                         free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4499         }
4500
4501         return ret;
4502 }
4503
4504 static int
4505 smb3_receive_transform(struct TCP_Server_Info *server,
4506                        struct mid_q_entry **mids, char **bufs, int *num_mids)
4507 {
4508         char *buf = server->smallbuf;
4509         unsigned int pdu_length = server->pdu_size;
4510         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4511         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4512
4513         if (pdu_length < sizeof(struct smb2_transform_hdr) +
4514                                                 sizeof(struct smb2_sync_hdr)) {
4515                 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4516                          pdu_length);
4517                 cifs_reconnect(server);
4518                 wake_up(&server->response_q);
4519                 return -ECONNABORTED;
4520         }
4521
4522         if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4523                 cifs_server_dbg(VFS, "Transform message is broken\n");
4524                 cifs_reconnect(server);
4525                 wake_up(&server->response_q);
4526                 return -ECONNABORTED;
4527         }
4528
4529         /* TODO: add support for compounds containing READ. */
4530         if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4531                 return receive_encrypted_read(server, &mids[0], num_mids);
4532         }
4533
4534         return receive_encrypted_standard(server, mids, bufs, num_mids);
4535 }
4536
4537 int
4538 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4539 {
4540         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4541
4542         return handle_read_data(server, mid, buf, server->pdu_size,
4543                                 NULL, 0, 0);
4544 }
4545
4546 static int
4547 smb2_next_header(char *buf)
4548 {
4549         struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4550         struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4551
4552         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4553                 return sizeof(struct smb2_transform_hdr) +
4554                   le32_to_cpu(t_hdr->OriginalMessageSize);
4555
4556         return le32_to_cpu(hdr->NextCommand);
4557 }
4558
4559 static int
4560 smb2_make_node(unsigned int xid, struct inode *inode,
4561                struct dentry *dentry, struct cifs_tcon *tcon,
4562                char *full_path, umode_t mode, dev_t dev)
4563 {
4564         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4565         int rc = -EPERM;
4566         FILE_ALL_INFO *buf = NULL;
4567         struct cifs_io_parms io_parms;
4568         __u32 oplock = 0;
4569         struct cifs_fid fid;
4570         struct cifs_open_parms oparms;
4571         unsigned int bytes_written;
4572         struct win_dev *pdev;
4573         struct kvec iov[2];
4574
4575         /*
4576          * Check if mounted with mount parm 'sfu' mount parm.
4577          * SFU emulation should work with all servers, but only
4578          * supports block and char device (no socket & fifo),
4579          * and was used by default in earlier versions of Windows
4580          */
4581         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4582                 goto out;
4583
4584         /*
4585          * TODO: Add ability to create instead via reparse point. Windows (e.g.
4586          * their current NFS server) uses this approach to expose special files
4587          * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4588          */
4589
4590         if (!S_ISCHR(mode) && !S_ISBLK(mode))
4591                 goto out;
4592
4593         cifs_dbg(FYI, "sfu compat create special file\n");
4594
4595         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4596         if (buf == NULL) {
4597                 rc = -ENOMEM;
4598                 goto out;
4599         }
4600
4601         oparms.tcon = tcon;
4602         oparms.cifs_sb = cifs_sb;
4603         oparms.desired_access = GENERIC_WRITE;
4604         oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4605                                                     CREATE_OPTION_SPECIAL);
4606         oparms.disposition = FILE_CREATE;
4607         oparms.path = full_path;
4608         oparms.fid = &fid;
4609         oparms.reconnect = false;
4610
4611         if (tcon->ses->server->oplocks)
4612                 oplock = REQ_OPLOCK;
4613         else
4614                 oplock = 0;
4615         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4616         if (rc)
4617                 goto out;
4618
4619         /*
4620          * BB Do not bother to decode buf since no local inode yet to put
4621          * timestamps in, but we can reuse it safely.
4622          */
4623
4624         pdev = (struct win_dev *)buf;
4625         io_parms.pid = current->tgid;
4626         io_parms.tcon = tcon;
4627         io_parms.offset = 0;
4628         io_parms.length = sizeof(struct win_dev);
4629         iov[1].iov_base = buf;
4630         iov[1].iov_len = sizeof(struct win_dev);
4631         if (S_ISCHR(mode)) {
4632                 memcpy(pdev->type, "IntxCHR", 8);
4633                 pdev->major = cpu_to_le64(MAJOR(dev));
4634                 pdev->minor = cpu_to_le64(MINOR(dev));
4635                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4636                                                         &bytes_written, iov, 1);
4637         } else if (S_ISBLK(mode)) {
4638                 memcpy(pdev->type, "IntxBLK", 8);
4639                 pdev->major = cpu_to_le64(MAJOR(dev));
4640                 pdev->minor = cpu_to_le64(MINOR(dev));
4641                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4642                                                         &bytes_written, iov, 1);
4643         }
4644         tcon->ses->server->ops->close(xid, tcon, &fid);
4645         d_drop(dentry);
4646
4647         /* FIXME: add code here to set EAs */
4648 out:
4649         kfree(buf);
4650         return rc;
4651 }
4652
4653
4654 struct smb_version_operations smb20_operations = {
4655         .compare_fids = smb2_compare_fids,
4656         .setup_request = smb2_setup_request,
4657         .setup_async_request = smb2_setup_async_request,
4658         .check_receive = smb2_check_receive,
4659         .add_credits = smb2_add_credits,
4660         .set_credits = smb2_set_credits,
4661         .get_credits_field = smb2_get_credits_field,
4662         .get_credits = smb2_get_credits,
4663         .wait_mtu_credits = cifs_wait_mtu_credits,
4664         .get_next_mid = smb2_get_next_mid,
4665         .revert_current_mid = smb2_revert_current_mid,
4666         .read_data_offset = smb2_read_data_offset,
4667         .read_data_length = smb2_read_data_length,
4668         .map_error = map_smb2_to_linux_error,
4669         .find_mid = smb2_find_mid,
4670         .check_message = smb2_check_message,
4671         .dump_detail = smb2_dump_detail,
4672         .clear_stats = smb2_clear_stats,
4673         .print_stats = smb2_print_stats,
4674         .is_oplock_break = smb2_is_valid_oplock_break,
4675         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4676         .downgrade_oplock = smb2_downgrade_oplock,
4677         .need_neg = smb2_need_neg,
4678         .negotiate = smb2_negotiate,
4679         .negotiate_wsize = smb2_negotiate_wsize,
4680         .negotiate_rsize = smb2_negotiate_rsize,
4681         .sess_setup = SMB2_sess_setup,
4682         .logoff = SMB2_logoff,
4683         .tree_connect = SMB2_tcon,
4684         .tree_disconnect = SMB2_tdis,
4685         .qfs_tcon = smb2_qfs_tcon,
4686         .is_path_accessible = smb2_is_path_accessible,
4687         .can_echo = smb2_can_echo,
4688         .echo = SMB2_echo,
4689         .query_path_info = smb2_query_path_info,
4690         .get_srv_inum = smb2_get_srv_inum,
4691         .query_file_info = smb2_query_file_info,
4692         .set_path_size = smb2_set_path_size,
4693         .set_file_size = smb2_set_file_size,
4694         .set_file_info = smb2_set_file_info,
4695         .set_compression = smb2_set_compression,
4696         .mkdir = smb2_mkdir,
4697         .mkdir_setinfo = smb2_mkdir_setinfo,
4698         .rmdir = smb2_rmdir,
4699         .unlink = smb2_unlink,
4700         .rename = smb2_rename_path,
4701         .create_hardlink = smb2_create_hardlink,
4702         .query_symlink = smb2_query_symlink,
4703         .query_mf_symlink = smb3_query_mf_symlink,
4704         .create_mf_symlink = smb3_create_mf_symlink,
4705         .open = smb2_open_file,
4706         .set_fid = smb2_set_fid,
4707         .close = smb2_close_file,
4708         .flush = smb2_flush_file,
4709         .async_readv = smb2_async_readv,
4710         .async_writev = smb2_async_writev,
4711         .sync_read = smb2_sync_read,
4712         .sync_write = smb2_sync_write,
4713         .query_dir_first = smb2_query_dir_first,
4714         .query_dir_next = smb2_query_dir_next,
4715         .close_dir = smb2_close_dir,
4716         .calc_smb_size = smb2_calc_size,
4717         .is_status_pending = smb2_is_status_pending,
4718         .is_session_expired = smb2_is_session_expired,
4719         .oplock_response = smb2_oplock_response,
4720         .queryfs = smb2_queryfs,
4721         .mand_lock = smb2_mand_lock,
4722         .mand_unlock_range = smb2_unlock_range,
4723         .push_mand_locks = smb2_push_mandatory_locks,
4724         .get_lease_key = smb2_get_lease_key,
4725         .set_lease_key = smb2_set_lease_key,
4726         .new_lease_key = smb2_new_lease_key,
4727         .calc_signature = smb2_calc_signature,
4728         .is_read_op = smb2_is_read_op,
4729         .set_oplock_level = smb2_set_oplock_level,
4730         .create_lease_buf = smb2_create_lease_buf,
4731         .parse_lease_buf = smb2_parse_lease_buf,
4732         .copychunk_range = smb2_copychunk_range,
4733         .wp_retry_size = smb2_wp_retry_size,
4734         .dir_needs_close = smb2_dir_needs_close,
4735         .get_dfs_refer = smb2_get_dfs_refer,
4736         .select_sectype = smb2_select_sectype,
4737 #ifdef CONFIG_CIFS_XATTR
4738         .query_all_EAs = smb2_query_eas,
4739         .set_EA = smb2_set_ea,
4740 #endif /* CIFS_XATTR */
4741         .get_acl = get_smb2_acl,
4742         .get_acl_by_fid = get_smb2_acl_by_fid,
4743         .set_acl = set_smb2_acl,
4744         .next_header = smb2_next_header,
4745         .ioctl_query_info = smb2_ioctl_query_info,
4746         .make_node = smb2_make_node,
4747         .fiemap = smb3_fiemap,
4748         .llseek = smb3_llseek,
4749 };
4750
4751 struct smb_version_operations smb21_operations = {
4752         .compare_fids = smb2_compare_fids,
4753         .setup_request = smb2_setup_request,
4754         .setup_async_request = smb2_setup_async_request,
4755         .check_receive = smb2_check_receive,
4756         .add_credits = smb2_add_credits,
4757         .set_credits = smb2_set_credits,
4758         .get_credits_field = smb2_get_credits_field,
4759         .get_credits = smb2_get_credits,
4760         .wait_mtu_credits = smb2_wait_mtu_credits,
4761         .adjust_credits = smb2_adjust_credits,
4762         .get_next_mid = smb2_get_next_mid,
4763         .revert_current_mid = smb2_revert_current_mid,
4764         .read_data_offset = smb2_read_data_offset,
4765         .read_data_length = smb2_read_data_length,
4766         .map_error = map_smb2_to_linux_error,
4767         .find_mid = smb2_find_mid,
4768         .check_message = smb2_check_message,
4769         .dump_detail = smb2_dump_detail,
4770         .clear_stats = smb2_clear_stats,
4771         .print_stats = smb2_print_stats,
4772         .is_oplock_break = smb2_is_valid_oplock_break,
4773         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4774         .downgrade_oplock = smb2_downgrade_oplock,
4775         .need_neg = smb2_need_neg,
4776         .negotiate = smb2_negotiate,
4777         .negotiate_wsize = smb2_negotiate_wsize,
4778         .negotiate_rsize = smb2_negotiate_rsize,
4779         .sess_setup = SMB2_sess_setup,
4780         .logoff = SMB2_logoff,
4781         .tree_connect = SMB2_tcon,
4782         .tree_disconnect = SMB2_tdis,
4783         .qfs_tcon = smb2_qfs_tcon,
4784         .is_path_accessible = smb2_is_path_accessible,
4785         .can_echo = smb2_can_echo,
4786         .echo = SMB2_echo,
4787         .query_path_info = smb2_query_path_info,
4788         .get_srv_inum = smb2_get_srv_inum,
4789         .query_file_info = smb2_query_file_info,
4790         .set_path_size = smb2_set_path_size,
4791         .set_file_size = smb2_set_file_size,
4792         .set_file_info = smb2_set_file_info,
4793         .set_compression = smb2_set_compression,
4794         .mkdir = smb2_mkdir,
4795         .mkdir_setinfo = smb2_mkdir_setinfo,
4796         .rmdir = smb2_rmdir,
4797         .unlink = smb2_unlink,
4798         .rename = smb2_rename_path,
4799         .create_hardlink = smb2_create_hardlink,
4800         .query_symlink = smb2_query_symlink,
4801         .query_mf_symlink = smb3_query_mf_symlink,
4802         .create_mf_symlink = smb3_create_mf_symlink,
4803         .open = smb2_open_file,
4804         .set_fid = smb2_set_fid,
4805         .close = smb2_close_file,
4806         .flush = smb2_flush_file,
4807         .async_readv = smb2_async_readv,
4808         .async_writev = smb2_async_writev,
4809         .sync_read = smb2_sync_read,
4810         .sync_write = smb2_sync_write,
4811         .query_dir_first = smb2_query_dir_first,
4812         .query_dir_next = smb2_query_dir_next,
4813         .close_dir = smb2_close_dir,
4814         .calc_smb_size = smb2_calc_size,
4815         .is_status_pending = smb2_is_status_pending,
4816         .is_session_expired = smb2_is_session_expired,
4817         .oplock_response = smb2_oplock_response,
4818         .queryfs = smb2_queryfs,
4819         .mand_lock = smb2_mand_lock,
4820         .mand_unlock_range = smb2_unlock_range,
4821         .push_mand_locks = smb2_push_mandatory_locks,
4822         .get_lease_key = smb2_get_lease_key,
4823         .set_lease_key = smb2_set_lease_key,
4824         .new_lease_key = smb2_new_lease_key,
4825         .calc_signature = smb2_calc_signature,
4826         .is_read_op = smb21_is_read_op,
4827         .set_oplock_level = smb21_set_oplock_level,
4828         .create_lease_buf = smb2_create_lease_buf,
4829         .parse_lease_buf = smb2_parse_lease_buf,
4830         .copychunk_range = smb2_copychunk_range,
4831         .wp_retry_size = smb2_wp_retry_size,
4832         .dir_needs_close = smb2_dir_needs_close,
4833         .enum_snapshots = smb3_enum_snapshots,
4834         .notify = smb3_notify,
4835         .get_dfs_refer = smb2_get_dfs_refer,
4836         .select_sectype = smb2_select_sectype,
4837 #ifdef CONFIG_CIFS_XATTR
4838         .query_all_EAs = smb2_query_eas,
4839         .set_EA = smb2_set_ea,
4840 #endif /* CIFS_XATTR */
4841         .get_acl = get_smb2_acl,
4842         .get_acl_by_fid = get_smb2_acl_by_fid,
4843         .set_acl = set_smb2_acl,
4844         .next_header = smb2_next_header,
4845         .ioctl_query_info = smb2_ioctl_query_info,
4846         .make_node = smb2_make_node,
4847         .fiemap = smb3_fiemap,
4848         .llseek = smb3_llseek,
4849 };
4850
4851 struct smb_version_operations smb30_operations = {
4852         .compare_fids = smb2_compare_fids,
4853         .setup_request = smb2_setup_request,
4854         .setup_async_request = smb2_setup_async_request,
4855         .check_receive = smb2_check_receive,
4856         .add_credits = smb2_add_credits,
4857         .set_credits = smb2_set_credits,
4858         .get_credits_field = smb2_get_credits_field,
4859         .get_credits = smb2_get_credits,
4860         .wait_mtu_credits = smb2_wait_mtu_credits,
4861         .adjust_credits = smb2_adjust_credits,
4862         .get_next_mid = smb2_get_next_mid,
4863         .revert_current_mid = smb2_revert_current_mid,
4864         .read_data_offset = smb2_read_data_offset,
4865         .read_data_length = smb2_read_data_length,
4866         .map_error = map_smb2_to_linux_error,
4867         .find_mid = smb2_find_mid,
4868         .check_message = smb2_check_message,
4869         .dump_detail = smb2_dump_detail,
4870         .clear_stats = smb2_clear_stats,
4871         .print_stats = smb2_print_stats,
4872         .dump_share_caps = smb2_dump_share_caps,
4873         .is_oplock_break = smb2_is_valid_oplock_break,
4874         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4875         .downgrade_oplock = smb3_downgrade_oplock,
4876         .need_neg = smb2_need_neg,
4877         .negotiate = smb2_negotiate,
4878         .negotiate_wsize = smb3_negotiate_wsize,
4879         .negotiate_rsize = smb3_negotiate_rsize,
4880         .sess_setup = SMB2_sess_setup,
4881         .logoff = SMB2_logoff,
4882         .tree_connect = SMB2_tcon,
4883         .tree_disconnect = SMB2_tdis,
4884         .qfs_tcon = smb3_qfs_tcon,
4885         .is_path_accessible = smb2_is_path_accessible,
4886         .can_echo = smb2_can_echo,
4887         .echo = SMB2_echo,
4888         .query_path_info = smb2_query_path_info,
4889         .get_srv_inum = smb2_get_srv_inum,
4890         .query_file_info = smb2_query_file_info,
4891         .set_path_size = smb2_set_path_size,
4892         .set_file_size = smb2_set_file_size,
4893         .set_file_info = smb2_set_file_info,
4894         .set_compression = smb2_set_compression,
4895         .mkdir = smb2_mkdir,
4896         .mkdir_setinfo = smb2_mkdir_setinfo,
4897         .rmdir = smb2_rmdir,
4898         .unlink = smb2_unlink,
4899         .rename = smb2_rename_path,
4900         .create_hardlink = smb2_create_hardlink,
4901         .query_symlink = smb2_query_symlink,
4902         .query_mf_symlink = smb3_query_mf_symlink,
4903         .create_mf_symlink = smb3_create_mf_symlink,
4904         .open = smb2_open_file,
4905         .set_fid = smb2_set_fid,
4906         .close = smb2_close_file,
4907         .close_getattr = smb2_close_getattr,
4908         .flush = smb2_flush_file,
4909         .async_readv = smb2_async_readv,
4910         .async_writev = smb2_async_writev,
4911         .sync_read = smb2_sync_read,
4912         .sync_write = smb2_sync_write,
4913         .query_dir_first = smb2_query_dir_first,
4914         .query_dir_next = smb2_query_dir_next,
4915         .close_dir = smb2_close_dir,
4916         .calc_smb_size = smb2_calc_size,
4917         .is_status_pending = smb2_is_status_pending,
4918         .is_session_expired = smb2_is_session_expired,
4919         .oplock_response = smb2_oplock_response,
4920         .queryfs = smb2_queryfs,
4921         .mand_lock = smb2_mand_lock,
4922         .mand_unlock_range = smb2_unlock_range,
4923         .push_mand_locks = smb2_push_mandatory_locks,
4924         .get_lease_key = smb2_get_lease_key,
4925         .set_lease_key = smb2_set_lease_key,
4926         .new_lease_key = smb2_new_lease_key,
4927         .generate_signingkey = generate_smb30signingkey,
4928         .calc_signature = smb3_calc_signature,
4929         .set_integrity  = smb3_set_integrity,
4930         .is_read_op = smb21_is_read_op,
4931         .set_oplock_level = smb3_set_oplock_level,
4932         .create_lease_buf = smb3_create_lease_buf,
4933         .parse_lease_buf = smb3_parse_lease_buf,
4934         .copychunk_range = smb2_copychunk_range,
4935         .duplicate_extents = smb2_duplicate_extents,
4936         .validate_negotiate = smb3_validate_negotiate,
4937         .wp_retry_size = smb2_wp_retry_size,
4938         .dir_needs_close = smb2_dir_needs_close,
4939         .fallocate = smb3_fallocate,
4940         .enum_snapshots = smb3_enum_snapshots,
4941         .notify = smb3_notify,
4942         .init_transform_rq = smb3_init_transform_rq,
4943         .is_transform_hdr = smb3_is_transform_hdr,
4944         .receive_transform = smb3_receive_transform,
4945         .get_dfs_refer = smb2_get_dfs_refer,
4946         .select_sectype = smb2_select_sectype,
4947 #ifdef CONFIG_CIFS_XATTR
4948         .query_all_EAs = smb2_query_eas,
4949         .set_EA = smb2_set_ea,
4950 #endif /* CIFS_XATTR */
4951         .get_acl = get_smb2_acl,
4952         .get_acl_by_fid = get_smb2_acl_by_fid,
4953         .set_acl = set_smb2_acl,
4954         .next_header = smb2_next_header,
4955         .ioctl_query_info = smb2_ioctl_query_info,
4956         .make_node = smb2_make_node,
4957         .fiemap = smb3_fiemap,
4958         .llseek = smb3_llseek,
4959 };
4960
4961 struct smb_version_operations smb311_operations = {
4962         .compare_fids = smb2_compare_fids,
4963         .setup_request = smb2_setup_request,
4964         .setup_async_request = smb2_setup_async_request,
4965         .check_receive = smb2_check_receive,
4966         .add_credits = smb2_add_credits,
4967         .set_credits = smb2_set_credits,
4968         .get_credits_field = smb2_get_credits_field,
4969         .get_credits = smb2_get_credits,
4970         .wait_mtu_credits = smb2_wait_mtu_credits,
4971         .adjust_credits = smb2_adjust_credits,
4972         .get_next_mid = smb2_get_next_mid,
4973         .revert_current_mid = smb2_revert_current_mid,
4974         .read_data_offset = smb2_read_data_offset,
4975         .read_data_length = smb2_read_data_length,
4976         .map_error = map_smb2_to_linux_error,
4977         .find_mid = smb2_find_mid,
4978         .check_message = smb2_check_message,
4979         .dump_detail = smb2_dump_detail,
4980         .clear_stats = smb2_clear_stats,
4981         .print_stats = smb2_print_stats,
4982         .dump_share_caps = smb2_dump_share_caps,
4983         .is_oplock_break = smb2_is_valid_oplock_break,
4984         .handle_cancelled_mid = smb2_handle_cancelled_mid,
4985         .downgrade_oplock = smb3_downgrade_oplock,
4986         .need_neg = smb2_need_neg,
4987         .negotiate = smb2_negotiate,
4988         .negotiate_wsize = smb3_negotiate_wsize,
4989         .negotiate_rsize = smb3_negotiate_rsize,
4990         .sess_setup = SMB2_sess_setup,
4991         .logoff = SMB2_logoff,
4992         .tree_connect = SMB2_tcon,
4993         .tree_disconnect = SMB2_tdis,
4994         .qfs_tcon = smb3_qfs_tcon,
4995         .is_path_accessible = smb2_is_path_accessible,
4996         .can_echo = smb2_can_echo,
4997         .echo = SMB2_echo,
4998         .query_path_info = smb2_query_path_info,
4999         .get_srv_inum = smb2_get_srv_inum,
5000         .query_file_info = smb2_query_file_info,
5001         .set_path_size = smb2_set_path_size,
5002         .set_file_size = smb2_set_file_size,
5003         .set_file_info = smb2_set_file_info,
5004         .set_compression = smb2_set_compression,
5005         .mkdir = smb2_mkdir,
5006         .mkdir_setinfo = smb2_mkdir_setinfo,
5007         .posix_mkdir = smb311_posix_mkdir,
5008         .rmdir = smb2_rmdir,
5009         .unlink = smb2_unlink,
5010         .rename = smb2_rename_path,
5011         .create_hardlink = smb2_create_hardlink,
5012         .query_symlink = smb2_query_symlink,
5013         .query_mf_symlink = smb3_query_mf_symlink,
5014         .create_mf_symlink = smb3_create_mf_symlink,
5015         .open = smb2_open_file,
5016         .set_fid = smb2_set_fid,
5017         .close = smb2_close_file,
5018         .close_getattr = smb2_close_getattr,
5019         .flush = smb2_flush_file,
5020         .async_readv = smb2_async_readv,
5021         .async_writev = smb2_async_writev,
5022         .sync_read = smb2_sync_read,
5023         .sync_write = smb2_sync_write,
5024         .query_dir_first = smb2_query_dir_first,
5025         .query_dir_next = smb2_query_dir_next,
5026         .close_dir = smb2_close_dir,
5027         .calc_smb_size = smb2_calc_size,
5028         .is_status_pending = smb2_is_status_pending,
5029         .is_session_expired = smb2_is_session_expired,
5030         .oplock_response = smb2_oplock_response,
5031         .queryfs = smb311_queryfs,
5032         .mand_lock = smb2_mand_lock,
5033         .mand_unlock_range = smb2_unlock_range,
5034         .push_mand_locks = smb2_push_mandatory_locks,
5035         .get_lease_key = smb2_get_lease_key,
5036         .set_lease_key = smb2_set_lease_key,
5037         .new_lease_key = smb2_new_lease_key,
5038         .generate_signingkey = generate_smb311signingkey,
5039         .calc_signature = smb3_calc_signature,
5040         .set_integrity  = smb3_set_integrity,
5041         .is_read_op = smb21_is_read_op,
5042         .set_oplock_level = smb3_set_oplock_level,
5043         .create_lease_buf = smb3_create_lease_buf,
5044         .parse_lease_buf = smb3_parse_lease_buf,
5045         .copychunk_range = smb2_copychunk_range,
5046         .duplicate_extents = smb2_duplicate_extents,
5047 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5048         .wp_retry_size = smb2_wp_retry_size,
5049         .dir_needs_close = smb2_dir_needs_close,
5050         .fallocate = smb3_fallocate,
5051         .enum_snapshots = smb3_enum_snapshots,
5052         .notify = smb3_notify,
5053         .init_transform_rq = smb3_init_transform_rq,
5054         .is_transform_hdr = smb3_is_transform_hdr,
5055         .receive_transform = smb3_receive_transform,
5056         .get_dfs_refer = smb2_get_dfs_refer,
5057         .select_sectype = smb2_select_sectype,
5058 #ifdef CONFIG_CIFS_XATTR
5059         .query_all_EAs = smb2_query_eas,
5060         .set_EA = smb2_set_ea,
5061 #endif /* CIFS_XATTR */
5062         .get_acl = get_smb2_acl,
5063         .get_acl_by_fid = get_smb2_acl_by_fid,
5064         .set_acl = set_smb2_acl,
5065         .next_header = smb2_next_header,
5066         .ioctl_query_info = smb2_ioctl_query_info,
5067         .make_node = smb2_make_node,
5068         .fiemap = smb3_fiemap,
5069         .llseek = smb3_llseek,
5070 };
5071
5072 struct smb_version_values smb20_values = {
5073         .version_string = SMB20_VERSION_STRING,
5074         .protocol_id = SMB20_PROT_ID,
5075         .req_capabilities = 0, /* MBZ */
5076         .large_lock_type = 0,
5077         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5078         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5079         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5080         .header_size = sizeof(struct smb2_sync_hdr),
5081         .header_preamble_size = 0,
5082         .max_header_size = MAX_SMB2_HDR_SIZE,
5083         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5084         .lock_cmd = SMB2_LOCK,
5085         .cap_unix = 0,
5086         .cap_nt_find = SMB2_NT_FIND,
5087         .cap_large_files = SMB2_LARGE_FILES,
5088         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5089         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5090         .create_lease_size = sizeof(struct create_lease),
5091 };
5092
5093 struct smb_version_values smb21_values = {
5094         .version_string = SMB21_VERSION_STRING,
5095         .protocol_id = SMB21_PROT_ID,
5096         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5097         .large_lock_type = 0,
5098         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5099         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5100         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5101         .header_size = sizeof(struct smb2_sync_hdr),
5102         .header_preamble_size = 0,
5103         .max_header_size = MAX_SMB2_HDR_SIZE,
5104         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5105         .lock_cmd = SMB2_LOCK,
5106         .cap_unix = 0,
5107         .cap_nt_find = SMB2_NT_FIND,
5108         .cap_large_files = SMB2_LARGE_FILES,
5109         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5110         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5111         .create_lease_size = sizeof(struct create_lease),
5112 };
5113
5114 struct smb_version_values smb3any_values = {
5115         .version_string = SMB3ANY_VERSION_STRING,
5116         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5117         .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,
5118         .large_lock_type = 0,
5119         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5120         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5121         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5122         .header_size = sizeof(struct smb2_sync_hdr),
5123         .header_preamble_size = 0,
5124         .max_header_size = MAX_SMB2_HDR_SIZE,
5125         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5126         .lock_cmd = SMB2_LOCK,
5127         .cap_unix = 0,
5128         .cap_nt_find = SMB2_NT_FIND,
5129         .cap_large_files = SMB2_LARGE_FILES,
5130         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5131         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5132         .create_lease_size = sizeof(struct create_lease_v2),
5133 };
5134
5135 struct smb_version_values smbdefault_values = {
5136         .version_string = SMBDEFAULT_VERSION_STRING,
5137         .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5138         .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,
5139         .large_lock_type = 0,
5140         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5141         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5142         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5143         .header_size = sizeof(struct smb2_sync_hdr),
5144         .header_preamble_size = 0,
5145         .max_header_size = MAX_SMB2_HDR_SIZE,
5146         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5147         .lock_cmd = SMB2_LOCK,
5148         .cap_unix = 0,
5149         .cap_nt_find = SMB2_NT_FIND,
5150         .cap_large_files = SMB2_LARGE_FILES,
5151         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5152         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5153         .create_lease_size = sizeof(struct create_lease_v2),
5154 };
5155
5156 struct smb_version_values smb30_values = {
5157         .version_string = SMB30_VERSION_STRING,
5158         .protocol_id = SMB30_PROT_ID,
5159         .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,
5160         .large_lock_type = 0,
5161         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5162         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5163         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5164         .header_size = sizeof(struct smb2_sync_hdr),
5165         .header_preamble_size = 0,
5166         .max_header_size = MAX_SMB2_HDR_SIZE,
5167         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5168         .lock_cmd = SMB2_LOCK,
5169         .cap_unix = 0,
5170         .cap_nt_find = SMB2_NT_FIND,
5171         .cap_large_files = SMB2_LARGE_FILES,
5172         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5173         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5174         .create_lease_size = sizeof(struct create_lease_v2),
5175 };
5176
5177 struct smb_version_values smb302_values = {
5178         .version_string = SMB302_VERSION_STRING,
5179         .protocol_id = SMB302_PROT_ID,
5180         .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,
5181         .large_lock_type = 0,
5182         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5183         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5184         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5185         .header_size = sizeof(struct smb2_sync_hdr),
5186         .header_preamble_size = 0,
5187         .max_header_size = MAX_SMB2_HDR_SIZE,
5188         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5189         .lock_cmd = SMB2_LOCK,
5190         .cap_unix = 0,
5191         .cap_nt_find = SMB2_NT_FIND,
5192         .cap_large_files = SMB2_LARGE_FILES,
5193         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5194         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5195         .create_lease_size = sizeof(struct create_lease_v2),
5196 };
5197
5198 struct smb_version_values smb311_values = {
5199         .version_string = SMB311_VERSION_STRING,
5200         .protocol_id = SMB311_PROT_ID,
5201         .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,
5202         .large_lock_type = 0,
5203         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5204         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5205         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5206         .header_size = sizeof(struct smb2_sync_hdr),
5207         .header_preamble_size = 0,
5208         .max_header_size = MAX_SMB2_HDR_SIZE,
5209         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5210         .lock_cmd = SMB2_LOCK,
5211         .cap_unix = 0,
5212         .cap_nt_find = SMB2_NT_FIND,
5213         .cap_large_files = SMB2_LARGE_FILES,
5214         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5215         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5216         .create_lease_size = sizeof(struct create_lease_v2),
5217 };