fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uuid.h>
  25 #include <crypto/aead.h>
  26 #include "cifsglob.h"
  27 #include "smb2pdu.h"
  28 #include "smb2proto.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_unicode.h"
  32 #include "smb2status.h"
  33 #include "smb2glob.h"
  34 #include "cifs_ioctl.h"
  35
  36 static int
  37 change_conf(struct TCP_Server_Info *server)
  38 {
  39         server->credits += server->echo_credits + server->oplock_credits;
  40         server->oplock_credits = server->echo_credits = 0;
  41         switch (server->credits) {
  42         case 0:
  43                 return -1;
  44         case 1:
  45                 server->echoes = false;
  46                 server->oplocks = false;
  47                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  48                 break;
  49         case 2:
  50                 server->echoes = true;
  51                 server->oplocks = false;
  52                 server->echo_credits = 1;
  53                 cifs_dbg(FYI, "disabling oplocks\n");
  54                 break;
  55         default:
  56                 server->echoes = true;
  57                 if (enable_oplocks) {
  58                         server->oplocks = true;
  59                         server->oplock_credits = 1;
  60                 } else
  61                         server->oplocks = false;
  62
  63                 server->echo_credits = 1;
  64         }
  65         server->credits -= server->echo_credits + server->oplock_credits;
  66         return 0;
  67 }
  68
  69 static void
  70 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  71                  const int optype)
  72 {
  73         int *val, rc = 0;
  74         spin_lock(&server->req_lock);
  75         val = server->ops->get_credits_field(server, optype);
  76         *val += add;
  77         if (*val > 65000) {
  78                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  79                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  80         }
  81         server->in_flight--;
  82         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  83                 rc = change_conf(server);
  84         /*
  85          * Sometimes server returns 0 credits on oplock break ack - we need to
  86          * rebalance credits in this case.
  87          */
  88         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  89                  server->oplocks) {
  90                 if (server->credits > 1) {
  91                         server->credits--;
  92                         server->oplock_credits++;
  93                 }
  94         }
  95         spin_unlock(&server->req_lock);
  96         wake_up(&server->request_q);
  97         if (rc)
  98                 cifs_reconnect(server);
  99 }
 100
 101 static void
 102 smb2_set_credits(struct TCP_Server_Info *server, const int val)
 103 {
 104         spin_lock(&server->req_lock);
 105         server->credits = val;
 106         spin_unlock(&server->req_lock);
 107 }
 108
 109 static int *
 110 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 111 {
 112         switch (optype) {
 113         case CIFS_ECHO_OP:
 114                 return &server->echo_credits;
 115         case CIFS_OBREAK_OP:
 116                 return &server->oplock_credits;
 117         default:
 118                 return &server->credits;
 119         }
 120 }
 121
 122 static unsigned int
 123 smb2_get_credits(struct mid_q_entry *mid)
 124 {
 125         struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
 126
 127         return le16_to_cpu(shdr->CreditRequest);
 128 }
 129
 130 static int
 131 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 132                       unsigned int *num, unsigned int *credits)
 133 {
 134         int rc = 0;
 135         unsigned int scredits;
 136
 137         spin_lock(&server->req_lock);
 138         while (1) {
 139                 if (server->credits <= 0) {
 140                         spin_unlock(&server->req_lock);
 141                         cifs_num_waiters_inc(server);
 142                         rc = wait_event_killable(server->request_q,
 143                                         has_credits(server, &server->credits));
 144                         cifs_num_waiters_dec(server);
 145                         if (rc)
 146                                 return rc;
 147                         spin_lock(&server->req_lock);
 148                 } else {
 149                         if (server->tcpStatus == CifsExiting) {
 150                                 spin_unlock(&server->req_lock);
 151                                 return -ENOENT;
 152                         }
 153
 154                         scredits = server->credits;
 155                         /* can deadlock with reopen */
 156                         if (scredits == 1) {
 157                                 *num = SMB2_MAX_BUFFER_SIZE;
 158                                 *credits = 0;
 159                                 break;
 160                         }
 161
 162                         /* leave one credit for a possible reopen */
 163                         scredits--;
 164                         *num = min_t(unsigned int, size,
 165                                      scredits * SMB2_MAX_BUFFER_SIZE);
 166
 167                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 168                         server->credits -= *credits;
 169                         server->in_flight++;
 170                         break;
 171                 }
 172         }
 173         spin_unlock(&server->req_lock);
 174         return rc;
 175 }
 176
 177 static __u64
 178 smb2_get_next_mid(struct TCP_Server_Info *server)
 179 {
 180         __u64 mid;
 181         /* for SMB2 we need the current value */
 182         spin_lock(&GlobalMid_Lock);
 183         mid = server->CurrentMid++;
 184         spin_unlock(&GlobalMid_Lock);
 185         return mid;
 186 }
 187
 188 static struct mid_q_entry *
 189 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 190 {
 191         struct mid_q_entry *mid;
 192         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 193         __u64 wire_mid = le64_to_cpu(shdr->MessageId);
 194
 195         if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 196                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 197                 return NULL;
 198         }
 199
 200         spin_lock(&GlobalMid_Lock);
 201         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 202                 if ((mid->mid == wire_mid) &&
 203                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 204                     (mid->command == shdr->Command)) {
 205                         spin_unlock(&GlobalMid_Lock);
 206                         return mid;
 207                 }
 208         }
 209         spin_unlock(&GlobalMid_Lock);
 210         return NULL;
 211 }
 212
 213 static void
 214 smb2_dump_detail(void *buf)
 215 {
 216 #ifdef CONFIG_CIFS_DEBUG2
 217         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
 218
 219         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 220                  shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 221                  shdr->ProcessId);
 222         cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
 223 #endif
 224 }
 225
 226 static bool
 227 smb2_need_neg(struct TCP_Server_Info *server)
 228 {
 229         return server->max_read == 0;
 230 }
 231
 232 static int
 233 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 234 {
 235         int rc;
 236         ses->server->CurrentMid = 0;
 237         rc = SMB2_negotiate(xid, ses);
 238         /* BB we probably don't need to retry with modern servers */
 239         if (rc == -EAGAIN)
 240                 rc = -EHOSTDOWN;
 241         return rc;
 242 }
 243
 244 static unsigned int
 245 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 246 {
 247         struct TCP_Server_Info *server = tcon->ses->server;
 248         unsigned int wsize;
 249
 250         /* start with specified wsize, or default */
 251         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 252         wsize = min_t(unsigned int, wsize, server->max_write);
 253
 254         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 255                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 256
 257         return wsize;
 258 }
 259
 260 static unsigned int
 261 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 262 {
 263         struct TCP_Server_Info *server = tcon->ses->server;
 264         unsigned int rsize;
 265
 266         /* start with specified rsize, or default */
 267         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 268         rsize = min_t(unsigned int, rsize, server->max_read);
 269
 270         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 271                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 272
 273         return rsize;
 274 }
 275
 276 #ifdef CONFIG_CIFS_STATS2
 277 static int
 278 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 279 {
 280         int rc;
 281         unsigned int ret_data_len = 0;
 282         struct network_interface_info_ioctl_rsp *out_buf;
 283
 284         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 285                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 286                         false /* use_ipc */,
 287                         NULL /* no data input */, 0 /* no data input */,
 288                         (char **)&out_buf, &ret_data_len);
 289         if (rc != 0)
 290                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 291         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 292                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 293                 rc = -EINVAL;
 294         } else {
 295                 /* Dump info on first interface */
 296                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 297                         le32_to_cpu(out_buf->Capability));
 298                 cifs_dbg(FYI, "Link Speed %lld\n",
 299                         le64_to_cpu(out_buf->LinkSpeed));
 300         }
 301         kfree(out_buf);
 302         return rc;
 303 }
 304 #endif /* STATS2 */
 305
 306 static void
 307 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 308 {
 309         int rc;
 310         __le16 srch_path = 0; /* Null - open root of share */
 311         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 312         struct cifs_open_parms oparms;
 313         struct cifs_fid fid;
 314
 315         oparms.tcon = tcon;
 316         oparms.desired_access = FILE_READ_ATTRIBUTES;
 317         oparms.disposition = FILE_OPEN;
 318         oparms.create_options = 0;
 319         oparms.fid = &fid;
 320         oparms.reconnect = false;
 321
 322         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 323         if (rc)
 324                 return;
 325
 326 #ifdef CONFIG_CIFS_STATS2
 327         SMB3_request_interfaces(xid, tcon);
 328 #endif /* STATS2 */
 329
 330         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 331                         FS_ATTRIBUTE_INFORMATION);
 332         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 333                         FS_DEVICE_INFORMATION);
 334         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 335                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 336         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 337         return;
 338 }
 339
 340 static void
 341 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 342 {
 343         int rc;
 344         __le16 srch_path = 0; /* Null - open root of share */
 345         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 346         struct cifs_open_parms oparms;
 347         struct cifs_fid fid;
 348
 349         oparms.tcon = tcon;
 350         oparms.desired_access = FILE_READ_ATTRIBUTES;
 351         oparms.disposition = FILE_OPEN;
 352         oparms.create_options = 0;
 353         oparms.fid = &fid;
 354         oparms.reconnect = false;
 355
 356         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 357         if (rc)
 358                 return;
 359
 360         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 361                         FS_ATTRIBUTE_INFORMATION);
 362         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 363                         FS_DEVICE_INFORMATION);
 364         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 365         return;
 366 }
 367
 368 static int
 369 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 370                         struct cifs_sb_info *cifs_sb, const char *full_path)
 371 {
 372         int rc;
 373         __le16 *utf16_path;
 374         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 375         struct cifs_open_parms oparms;
 376         struct cifs_fid fid;
 377
 378         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 379         if (!utf16_path)
 380                 return -ENOMEM;
 381
 382         oparms.tcon = tcon;
 383         oparms.desired_access = FILE_READ_ATTRIBUTES;
 384         oparms.disposition = FILE_OPEN;
 385         oparms.create_options = 0;
 386         oparms.fid = &fid;
 387         oparms.reconnect = false;
 388
 389         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 390         if (rc) {
 391                 kfree(utf16_path);
 392                 return rc;
 393         }
 394
 395         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 396         kfree(utf16_path);
 397         return rc;
 398 }
 399
 400 static int
 401 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 402                   struct cifs_sb_info *cifs_sb, const char *full_path,
 403                   u64 *uniqueid, FILE_ALL_INFO *data)
 404 {
 405         *uniqueid = le64_to_cpu(data->IndexNumber);
 406         return 0;
 407 }
 408
 409 static int
 410 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 411                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 412 {
 413         int rc;
 414         struct smb2_file_all_info *smb2_data;
 415
 416         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 417                             GFP_KERNEL);
 418         if (smb2_data == NULL)
 419                 return -ENOMEM;
 420
 421         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 422                              smb2_data);
 423         if (!rc)
 424                 move_smb2_info_to_cifs(data, smb2_data);
 425         kfree(smb2_data);
 426         return rc;
 427 }
 428
 429 static bool
 430 smb2_can_echo(struct TCP_Server_Info *server)
 431 {
 432         return server->echoes;
 433 }
 434
 435 static void
 436 smb2_clear_stats(struct cifs_tcon *tcon)
 437 {
 438 #ifdef CONFIG_CIFS_STATS
 439         int i;
 440         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 441                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 442                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 443         }
 444 #endif
 445 }
 446
 447 static void
 448 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 449 {
 450         seq_puts(m, "\n\tShare Capabilities:");
 451         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 452                 seq_puts(m, " DFS,");
 453         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 454                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 455         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 456                 seq_puts(m, " SCALEOUT,");
 457         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 458                 seq_puts(m, " CLUSTER,");
 459         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 460                 seq_puts(m, " ASYMMETRIC,");
 461         if (tcon->capabilities == 0)
 462                 seq_puts(m, " None");
 463         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 464                 seq_puts(m, " Aligned,");
 465         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 466                 seq_puts(m, " Partition Aligned,");
 467         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 468                 seq_puts(m, " SSD,");
 469         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 470                 seq_puts(m, " TRIM-support,");
 471
 472         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 473         if (tcon->perf_sector_size)
 474                 seq_printf(m, "\tOptimal sector size: 0x%x",
 475                            tcon->perf_sector_size);
 476 }
 477
 478 static void
 479 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 480 {
 481 #ifdef CONFIG_CIFS_STATS
 482         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 483         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 484         seq_printf(m, "\nNegotiates: %d sent %d failed",
 485                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 486                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 487         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 488                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 489                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 490         seq_printf(m, "\nLogoffs: %d sent %d failed",
 491                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 492                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 493         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 494                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 495                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 496         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 497                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 498                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 499         seq_printf(m, "\nCreates: %d sent %d failed",
 500                    atomic_read(&sent[SMB2_CREATE_HE]),
 501                    atomic_read(&failed[SMB2_CREATE_HE]));
 502         seq_printf(m, "\nCloses: %d sent %d failed",
 503                    atomic_read(&sent[SMB2_CLOSE_HE]),
 504                    atomic_read(&failed[SMB2_CLOSE_HE]));
 505         seq_printf(m, "\nFlushes: %d sent %d failed",
 506                    atomic_read(&sent[SMB2_FLUSH_HE]),
 507                    atomic_read(&failed[SMB2_FLUSH_HE]));
 508         seq_printf(m, "\nReads: %d sent %d failed",
 509                    atomic_read(&sent[SMB2_READ_HE]),
 510                    atomic_read(&failed[SMB2_READ_HE]));
 511         seq_printf(m, "\nWrites: %d sent %d failed",
 512                    atomic_read(&sent[SMB2_WRITE_HE]),
 513                    atomic_read(&failed[SMB2_WRITE_HE]));
 514         seq_printf(m, "\nLocks: %d sent %d failed",
 515                    atomic_read(&sent[SMB2_LOCK_HE]),
 516                    atomic_read(&failed[SMB2_LOCK_HE]));
 517         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 518                    atomic_read(&sent[SMB2_IOCTL_HE]),
 519                    atomic_read(&failed[SMB2_IOCTL_HE]));
 520         seq_printf(m, "\nCancels: %d sent %d failed",
 521                    atomic_read(&sent[SMB2_CANCEL_HE]),
 522                    atomic_read(&failed[SMB2_CANCEL_HE]));
 523         seq_printf(m, "\nEchos: %d sent %d failed",
 524                    atomic_read(&sent[SMB2_ECHO_HE]),
 525                    atomic_read(&failed[SMB2_ECHO_HE]));
 526         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 527                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 528                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 529         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 530                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 531                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 532         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 533                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 534                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 535         seq_printf(m, "\nSetInfos: %d sent %d failed",
 536                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 537                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 538         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 539                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 540                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 541 #endif
 542 }
 543
 544 static void
 545 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 546 {
 547         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 548         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 549
 550         cfile->fid.persistent_fid = fid->persistent_fid;
 551         cfile->fid.volatile_fid = fid->volatile_fid;
 552         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 553                                       &fid->purge_cache);
 554         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 555         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 556 }
 557
 558 static void
 559 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 560                 struct cifs_fid *fid)
 561 {
 562         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 563 }
 564
 565 static int
 566 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 567                      u64 persistent_fid, u64 volatile_fid,
 568                      struct copychunk_ioctl *pcchunk)
 569 {
 570         int rc;
 571         unsigned int ret_data_len;
 572         struct resume_key_req *res_key;
 573
 574         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 575                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 576                         false /* use_ipc */,
 577                         NULL, 0 /* no input */,
 578                         (char **)&res_key, &ret_data_len);
 579
 580         if (rc) {
 581                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 582                 goto req_res_key_exit;
 583         }
 584         if (ret_data_len < sizeof(struct resume_key_req)) {
 585                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 586                 rc = -EINVAL;
 587                 goto req_res_key_exit;
 588         }
 589         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 590
 591 req_res_key_exit:
 592         kfree(res_key);
 593         return rc;
 594 }
 595
 596 static ssize_t
 597 smb2_copychunk_range(const unsigned int xid,
 598                         struct cifsFileInfo *srcfile,
 599                         struct cifsFileInfo *trgtfile, u64 src_off,
 600                         u64 len, u64 dest_off)
 601 {
 602         int rc;
 603         unsigned int ret_data_len;
 604         struct copychunk_ioctl *pcchunk;
 605         struct copychunk_ioctl_rsp *retbuf = NULL;
 606         struct cifs_tcon *tcon;
 607         int chunks_copied = 0;
 608         bool chunk_sizes_updated = false;
 609         ssize_t bytes_written, total_bytes_written = 0;
 610
 611         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 612
 613         if (pcchunk == NULL)
 614                 return -ENOMEM;
 615
 616         cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
 617         /* Request a key from the server to identify the source of the copy */
 618         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 619                                 srcfile->fid.persistent_fid,
 620                                 srcfile->fid.volatile_fid, pcchunk);
 621
 622         /* Note: request_res_key sets res_key null only if rc !=0 */
 623         if (rc)
 624                 goto cchunk_out;
 625
 626         /* For now array only one chunk long, will make more flexible later */
 627         pcchunk->ChunkCount = cpu_to_le32(1);
 628         pcchunk->Reserved = 0;
 629         pcchunk->Reserved2 = 0;
 630
 631         tcon = tlink_tcon(trgtfile->tlink);
 632
 633         while (len > 0) {
 634                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 635                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 636                 pcchunk->Length =
 637                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 638
 639                 /* Request server copy to target from src identified by key */
 640                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 641                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 642                         true /* is_fsctl */, false /* use_ipc */,
 643                         (char *)pcchunk,
 644                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 645                         &ret_data_len);
 646                 if (rc == 0) {
 647                         if (ret_data_len !=
 648                                         sizeof(struct copychunk_ioctl_rsp)) {
 649                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 650                                 rc = -EIO;
 651                                 goto cchunk_out;
 652                         }
 653                         if (retbuf->TotalBytesWritten == 0) {
 654                                 cifs_dbg(FYI, "no bytes copied\n");
 655                                 rc = -EIO;
 656                                 goto cchunk_out;
 657                         }
 658                         /*
 659                          * Check if server claimed to write more than we asked
 660                          */
 661                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 662                             le32_to_cpu(pcchunk->Length)) {
 663                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 664                                 rc = -EIO;
 665                                 goto cchunk_out;
 666                         }
 667                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 668                                 cifs_dbg(VFS, "invalid num chunks written\n");
 669                                 rc = -EIO;
 670                                 goto cchunk_out;
 671                         }
 672                         chunks_copied++;
 673
 674                         bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
 675                         src_off += bytes_written;
 676                         dest_off += bytes_written;
 677                         len -= bytes_written;
 678                         total_bytes_written += bytes_written;
 679
 680                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
 681                                 le32_to_cpu(retbuf->ChunksWritten),
 682                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 683                                 bytes_written);
 684                 } else if (rc == -EINVAL) {
 685                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 686                                 goto cchunk_out;
 687
 688                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 689                                 le32_to_cpu(retbuf->ChunksWritten),
 690                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 691                                 le32_to_cpu(retbuf->TotalBytesWritten));
 692
 693                         /*
 694                          * Check if this is the first request using these sizes,
 695                          * (ie check if copy succeed once with original sizes
 696                          * and check if the server gave us different sizes after
 697                          * we already updated max sizes on previous request).
 698                          * if not then why is the server returning an error now
 699                          */
 700                         if ((chunks_copied != 0) || chunk_sizes_updated)
 701                                 goto cchunk_out;
 702
 703                         /* Check that server is not asking us to grow size */
 704                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 705                                         tcon->max_bytes_chunk)
 706                                 tcon->max_bytes_chunk =
 707                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 708                         else
 709                                 goto cchunk_out; /* server gave us bogus size */
 710
 711                         /* No need to change MaxChunks since already set to 1 */
 712                         chunk_sizes_updated = true;
 713                 } else
 714                         goto cchunk_out;
 715         }
 716
 717 cchunk_out:
 718         kfree(pcchunk);
 719         kfree(retbuf);
 720         if (rc)
 721                 return rc;
 722         else
 723                 return total_bytes_written;
 724 }
 725
 726 static int
 727 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 728                 struct cifs_fid *fid)
 729 {
 730         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 731 }
 732
 733 static unsigned int
 734 smb2_read_data_offset(char *buf)
 735 {
 736         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 737         return rsp->DataOffset;
 738 }
 739
 740 static unsigned int
 741 smb2_read_data_length(char *buf)
 742 {
 743         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 744         return le32_to_cpu(rsp->DataLength);
 745 }
 746
 747
 748 static int
 749 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 750                struct cifs_io_parms *parms, unsigned int *bytes_read,
 751                char **buf, int *buf_type)
 752 {
 753         parms->persistent_fid = pfid->persistent_fid;
 754         parms->volatile_fid = pfid->volatile_fid;
 755         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 756 }
 757
 758 static int
 759 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 760                 struct cifs_io_parms *parms, unsigned int *written,
 761                 struct kvec *iov, unsigned long nr_segs)
 762 {
 763
 764         parms->persistent_fid = pfid->persistent_fid;
 765         parms->volatile_fid = pfid->volatile_fid;
 766         return SMB2_write(xid, parms, written, iov, nr_segs);
 767 }
 768
 769 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 770 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 771                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 772 {
 773         struct cifsInodeInfo *cifsi;
 774         int rc;
 775
 776         cifsi = CIFS_I(inode);
 777
 778         /* if file already sparse don't bother setting sparse again */
 779         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 780                 return true; /* already sparse */
 781
 782         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 783                 return true; /* already not sparse */
 784
 785         /*
 786          * Can't check for sparse support on share the usual way via the
 787          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 788          * since Samba server doesn't set the flag on the share, yet
 789          * supports the set sparse FSCTL and returns sparse correctly
 790          * in the file attributes. If we fail setting sparse though we
 791          * mark that server does not support sparse files for this share
 792          * to avoid repeatedly sending the unsupported fsctl to server
 793          * if the file is repeatedly extended.
 794          */
 795         if (tcon->broken_sparse_sup)
 796                 return false;
 797
 798         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 799                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 800                         true /* is_fctl */, false /* use_ipc */,
 801                         &setsparse, 1, NULL, NULL);
 802         if (rc) {
 803                 tcon->broken_sparse_sup = true;
 804                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 805                 return false;
 806         }
 807
 808         if (setsparse)
 809                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 810         else
 811                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 812
 813         return true;
 814 }
 815
 816 static int
 817 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 818                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 819 {
 820         __le64 eof = cpu_to_le64(size);
 821         struct inode *inode;
 822
 823         /*
 824          * If extending file more than one page make sparse. Many Linux fs
 825          * make files sparse by default when extending via ftruncate
 826          */
 827         inode = d_inode(cfile->dentry);
 828
 829         if (!set_alloc && (size > inode->i_size + 8192)) {
 830                 __u8 set_sparse = 1;
 831
 832                 /* whether set sparse succeeds or not, extend the file */
 833                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 834         }
 835
 836         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 837                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 838 }
 839
 840 static int
 841 smb2_duplicate_extents(const unsigned int xid,
 842                         struct cifsFileInfo *srcfile,
 843                         struct cifsFileInfo *trgtfile, u64 src_off,
 844                         u64 len, u64 dest_off)
 845 {
 846         int rc;
 847         unsigned int ret_data_len;
 848         struct duplicate_extents_to_file dup_ext_buf;
 849         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 850
 851         /* server fileays advertise duplicate extent support with this flag */
 852         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 853              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 854                 return -EOPNOTSUPP;
 855
 856         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 857         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 858         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 859         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 860         dup_ext_buf.ByteCount = cpu_to_le64(len);
 861         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 862                 src_off, dest_off, len);
 863
 864         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 865         if (rc)
 866                 goto duplicate_extents_out;
 867
 868         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 869                         trgtfile->fid.volatile_fid,
 870                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 871                         true /* is_fsctl */, false /* use_ipc */,
 872                         (char *)&dup_ext_buf,
 873                         sizeof(struct duplicate_extents_to_file),
 874                         NULL,
 875                         &ret_data_len);
 876
 877         if (ret_data_len > 0)
 878                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 879
 880 duplicate_extents_out:
 881         return rc;
 882 }
 883
 884 static int
 885 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 886                    struct cifsFileInfo *cfile)
 887 {
 888         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 889                             cfile->fid.volatile_fid);
 890 }
 891
 892 static int
 893 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 894                    struct cifsFileInfo *cfile)
 895 {
 896         struct fsctl_set_integrity_information_req integr_info;
 897         unsigned int ret_data_len;
 898
 899         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 900         integr_info.Flags = 0;
 901         integr_info.Reserved = 0;
 902
 903         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 904                         cfile->fid.volatile_fid,
 905                         FSCTL_SET_INTEGRITY_INFORMATION,
 906                         true /* is_fsctl */, false /* use_ipc */,
 907                         (char *)&integr_info,
 908                         sizeof(struct fsctl_set_integrity_information_req),
 909                         NULL,
 910                         &ret_data_len);
 911
 912 }
 913
 914 static int
 915 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
 916                    struct cifsFileInfo *cfile, void __user *ioc_buf)
 917 {
 918         char *retbuf = NULL;
 919         unsigned int ret_data_len = 0;
 920         int rc;
 921         struct smb_snapshot_array snapshot_in;
 922
 923         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 924                         cfile->fid.volatile_fid,
 925                         FSCTL_SRV_ENUMERATE_SNAPSHOTS,
 926                         true /* is_fsctl */, false /* use_ipc */,
 927                         NULL, 0 /* no input data */,
 928                         (char **)&retbuf,
 929                         &ret_data_len);
 930         cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
 931                         rc, ret_data_len);
 932         if (rc)
 933                 return rc;
 934
 935         if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
 936                 /* Fixup buffer */
 937                 if (copy_from_user(&snapshot_in, ioc_buf,
 938                     sizeof(struct smb_snapshot_array))) {
 939                         rc = -EFAULT;
 940                         kfree(retbuf);
 941                         return rc;
 942                 }
 943                 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
 944                         rc = -ERANGE;
 945                         return rc;
 946                 }
 947
 948                 if (ret_data_len > snapshot_in.snapshot_array_size)
 949                         ret_data_len = snapshot_in.snapshot_array_size;
 950
 951                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
 952                         rc = -EFAULT;
 953         }
 954
 955         kfree(retbuf);
 956         return rc;
 957 }
 958
 959 static int
 960 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 961                      const char *path, struct cifs_sb_info *cifs_sb,
 962                      struct cifs_fid *fid, __u16 search_flags,
 963                      struct cifs_search_info *srch_inf)
 964 {
 965         __le16 *utf16_path;
 966         int rc;
 967         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 968         struct cifs_open_parms oparms;
 969
 970         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 971         if (!utf16_path)
 972                 return -ENOMEM;
 973
 974         oparms.tcon = tcon;
 975         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 976         oparms.disposition = FILE_OPEN;
 977         oparms.create_options = 0;
 978         oparms.fid = fid;
 979         oparms.reconnect = false;
 980
 981         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 982         kfree(utf16_path);
 983         if (rc) {
 984                 cifs_dbg(VFS, "open dir failed\n");
 985                 return rc;
 986         }
 987
 988         srch_inf->entries_in_buffer = 0;
 989         srch_inf->index_of_last_entry = 0;
 990
 991         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 992                                   fid->volatile_fid, 0, srch_inf);
 993         if (rc) {
 994                 cifs_dbg(VFS, "query directory failed\n");
 995                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 996         }
 997         return rc;
 998 }
 999
1000 static int
1001 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1002                     struct cifs_fid *fid, __u16 search_flags,
1003                     struct cifs_search_info *srch_inf)
1004 {
1005         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1006                                     fid->volatile_fid, 0, srch_inf);
1007 }
1008
1009 static int
1010 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1011                struct cifs_fid *fid)
1012 {
1013         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1014 }
1015
1016 /*
1017 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1018 * the number of credits and return true. Otherwise - return false.
1019 */
1020 static bool
1021 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1022 {
1023         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1024
1025         if (shdr->Status != STATUS_PENDING)
1026                 return false;
1027
1028         if (!length) {
1029                 spin_lock(&server->req_lock);
1030                 server->credits += le16_to_cpu(shdr->CreditRequest);
1031                 spin_unlock(&server->req_lock);
1032                 wake_up(&server->request_q);
1033         }
1034
1035         return true;
1036 }
1037
1038 static int
1039 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1040                      struct cifsInodeInfo *cinode)
1041 {
1042         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1043                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1044                                         smb2_get_lease_state(cinode));
1045
1046         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1047                                  fid->volatile_fid,
1048                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1049 }
1050
1051 static int
1052 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1053              struct kstatfs *buf)
1054 {
1055         int rc;
1056         __le16 srch_path = 0; /* Null - open root of share */
1057         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1058         struct cifs_open_parms oparms;
1059         struct cifs_fid fid;
1060
1061         oparms.tcon = tcon;
1062         oparms.desired_access = FILE_READ_ATTRIBUTES;
1063         oparms.disposition = FILE_OPEN;
1064         oparms.create_options = 0;
1065         oparms.fid = &fid;
1066         oparms.reconnect = false;
1067
1068         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1069         if (rc)
1070                 return rc;
1071         buf->f_type = SMB2_MAGIC_NUMBER;
1072         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1073                            buf);
1074         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1075         return rc;
1076 }
1077
1078 static bool
1079 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1080 {
1081         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1082                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1083 }
1084
1085 static int
1086 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1087                __u64 length, __u32 type, int lock, int unlock, bool wait)
1088 {
1089         if (unlock && !lock)
1090                 type = SMB2_LOCKFLAG_UNLOCK;
1091         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1092                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1093                          current->tgid, length, offset, type, wait);
1094 }
1095
1096 static void
1097 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1098 {
1099         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1100 }
1101
1102 static void
1103 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1104 {
1105         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1106 }
1107
1108 static void
1109 smb2_new_lease_key(struct cifs_fid *fid)
1110 {
1111         generate_random_uuid(fid->lease_key);
1112 }
1113
1114 static int
1115 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1116                    const char *search_name,
1117                    struct dfs_info3_param **target_nodes,
1118                    unsigned int *num_of_nodes,
1119                    const struct nls_table *nls_codepage, int remap)
1120 {
1121         int rc;
1122         __le16 *utf16_path = NULL;
1123         int utf16_path_len = 0;
1124         struct cifs_tcon *tcon;
1125         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1126         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1127         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1128
1129         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1130
1131         /*
1132          * Use any tcon from the current session. Here, the first one.
1133          */
1134         spin_lock(&cifs_tcp_ses_lock);
1135         tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
1136                                         tcon_list);
1137         if (tcon)
1138                 tcon->tc_count++;
1139         spin_unlock(&cifs_tcp_ses_lock);
1140
1141         if (!tcon) {
1142                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1143                          ses);
1144                 rc = -ENOTCONN;
1145                 goto out;
1146         }
1147
1148         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1149                                            &utf16_path_len,
1150                                            nls_codepage, remap);
1151         if (!utf16_path) {
1152                 rc = -ENOMEM;
1153                 goto out;
1154         }
1155
1156         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1157         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1158         if (!dfs_req) {
1159                 rc = -ENOMEM;
1160                 goto out;
1161         }
1162
1163         /* Highest DFS referral version understood */
1164         dfs_req->MaxReferralLevel = DFS_VERSION;
1165
1166         /* Path to resolve in an UTF-16 null-terminated string */
1167         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1168
1169         do {
1170                 /* try first with IPC */
1171                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1172                                 FSCTL_DFS_GET_REFERRALS,
1173                                 true /* is_fsctl */, true /* use_ipc */,
1174                                 (char *)dfs_req, dfs_req_size,
1175                                 (char **)&dfs_rsp, &dfs_rsp_size);
1176                 if (rc == -ENOTCONN) {
1177                         /* try with normal tcon */
1178                         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1179                                         FSCTL_DFS_GET_REFERRALS,
1180                                         true /* is_fsctl */, false /*use_ipc*/,
1181                                         (char *)dfs_req, dfs_req_size,
1182                                         (char **)&dfs_rsp, &dfs_rsp_size);
1183                 }
1184         } while (rc == -EAGAIN);
1185
1186         if (rc) {
1187                 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1188                 goto out;
1189         }
1190
1191         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1192                                  num_of_nodes, target_nodes,
1193                                  nls_codepage, remap, search_name,
1194                                  true /* is_unicode */);
1195         if (rc) {
1196                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1197                 goto out;
1198         }
1199
1200  out:
1201         if (tcon) {
1202                 spin_lock(&cifs_tcp_ses_lock);
1203                 tcon->tc_count--;
1204                 spin_unlock(&cifs_tcp_ses_lock);
1205         }
1206         kfree(utf16_path);
1207         kfree(dfs_req);
1208         kfree(dfs_rsp);
1209         return rc;
1210 }
1211 #define SMB2_SYMLINK_STRUCT_SIZE \
1212         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1213
1214 static int
1215 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1216                    const char *full_path, char **target_path,
1217                    struct cifs_sb_info *cifs_sb)
1218 {
1219         int rc;
1220         __le16 *utf16_path;
1221         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1222         struct cifs_open_parms oparms;
1223         struct cifs_fid fid;
1224         struct smb2_err_rsp *err_buf = NULL;
1225         struct smb2_symlink_err_rsp *symlink;
1226         unsigned int sub_len;
1227         unsigned int sub_offset;
1228         unsigned int print_len;
1229         unsigned int print_offset;
1230
1231         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1232
1233         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1234         if (!utf16_path)
1235                 return -ENOMEM;
1236
1237         oparms.tcon = tcon;
1238         oparms.desired_access = FILE_READ_ATTRIBUTES;
1239         oparms.disposition = FILE_OPEN;
1240         oparms.create_options = 0;
1241         oparms.fid = &fid;
1242         oparms.reconnect = false;
1243
1244         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1245
1246         if (!rc || !err_buf) {
1247                 kfree(utf16_path);
1248                 return -ENOENT;
1249         }
1250
1251         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1252             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1253                 kfree(utf16_path);
1254                 return -ENOENT;
1255         }
1256
1257         /* open must fail on symlink - reset rc */
1258         rc = 0;
1259         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1260         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1261         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1262         print_len = le16_to_cpu(symlink->PrintNameLength);
1263         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1264
1265         if (get_rfc1002_length(err_buf) + 4 <
1266                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1267                 kfree(utf16_path);
1268                 return -ENOENT;
1269         }
1270
1271         if (get_rfc1002_length(err_buf) + 4 <
1272                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1273                 kfree(utf16_path);
1274                 return -ENOENT;
1275         }
1276
1277         *target_path = cifs_strndup_from_utf16(
1278                                 (char *)symlink->PathBuffer + sub_offset,
1279                                 sub_len, true, cifs_sb->local_nls);
1280         if (!(*target_path)) {
1281                 kfree(utf16_path);
1282                 return -ENOMEM;
1283         }
1284         convert_delimiter(*target_path, '/');
1285         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1286         kfree(utf16_path);
1287         return rc;
1288 }
1289
1290 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1291                             loff_t offset, loff_t len, bool keep_size)
1292 {
1293         struct inode *inode;
1294         struct cifsInodeInfo *cifsi;
1295         struct cifsFileInfo *cfile = file->private_data;
1296         struct file_zero_data_information fsctl_buf;
1297         long rc;
1298         unsigned int xid;
1299
1300         xid = get_xid();
1301
1302         inode = d_inode(cfile->dentry);
1303         cifsi = CIFS_I(inode);
1304
1305         /* if file not oplocked can't be sure whether asking to extend size */
1306         if (!CIFS_CACHE_READ(cifsi))
1307                 if (keep_size == false)
1308                         return -EOPNOTSUPP;
1309
1310         /*
1311          * Must check if file sparse since fallocate -z (zero range) assumes
1312          * non-sparse allocation
1313          */
1314         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1315                 return -EOPNOTSUPP;
1316
1317         /*
1318          * need to make sure we are not asked to extend the file since the SMB3
1319          * fsctl does not change the file size. In the future we could change
1320          * this to zero the first part of the range then set the file size
1321          * which for a non sparse file would zero the newly extended range
1322          */
1323         if (keep_size == false)
1324                 if (i_size_read(inode) < offset + len)
1325                         return -EOPNOTSUPP;
1326
1327         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1328
1329         fsctl_buf.FileOffset = cpu_to_le64(offset);
1330         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1331
1332         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1333                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1334                         true /* is_fctl */, false /* use_ipc */,
1335                         (char *)&fsctl_buf,
1336                         sizeof(struct file_zero_data_information), NULL, NULL);
1337         free_xid(xid);
1338         return rc;
1339 }
1340
1341 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1342                             loff_t offset, loff_t len)
1343 {
1344         struct inode *inode;
1345         struct cifsInodeInfo *cifsi;
1346         struct cifsFileInfo *cfile = file->private_data;
1347         struct file_zero_data_information fsctl_buf;
1348         long rc;
1349         unsigned int xid;
1350         __u8 set_sparse = 1;
1351
1352         xid = get_xid();
1353
1354         inode = d_inode(cfile->dentry);
1355         cifsi = CIFS_I(inode);
1356
1357         /* Need to make file sparse, if not already, before freeing range. */
1358         /* Consider adding equivalent for compressed since it could also work */
1359         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1360                 return -EOPNOTSUPP;
1361
1362         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1363
1364         fsctl_buf.FileOffset = cpu_to_le64(offset);
1365         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1366
1367         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1368                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1369                         true /* is_fctl */, false /* use_ipc */,
1370                         (char *)&fsctl_buf,
1371                         sizeof(struct file_zero_data_information), NULL, NULL);
1372         free_xid(xid);
1373         return rc;
1374 }
1375
1376 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1377                             loff_t off, loff_t len, bool keep_size)
1378 {
1379         struct inode *inode;
1380         struct cifsInodeInfo *cifsi;
1381         struct cifsFileInfo *cfile = file->private_data;
1382         long rc = -EOPNOTSUPP;
1383         unsigned int xid;
1384
1385         xid = get_xid();
1386
1387         inode = d_inode(cfile->dentry);
1388         cifsi = CIFS_I(inode);
1389
1390         /* if file not oplocked can't be sure whether asking to extend size */
1391         if (!CIFS_CACHE_READ(cifsi))
1392                 if (keep_size == false)
1393                         return -EOPNOTSUPP;
1394
1395         /*
1396          * Files are non-sparse by default so falloc may be a no-op
1397          * Must check if file sparse. If not sparse, and not extending
1398          * then no need to do anything since file already allocated
1399          */
1400         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1401                 if (keep_size == true)
1402                         return 0;
1403                 /* check if extending file */
1404                 else if (i_size_read(inode) >= off + len)
1405                         /* not extending file and already not sparse */
1406                         return 0;
1407                 /* BB: in future add else clause to extend file */
1408                 else
1409                         return -EOPNOTSUPP;
1410         }
1411
1412         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1413                 /*
1414                  * Check if falloc starts within first few pages of file
1415                  * and ends within a few pages of the end of file to
1416                  * ensure that most of file is being forced to be
1417                  * fallocated now. If so then setting whole file sparse
1418                  * ie potentially making a few extra pages at the beginning
1419                  * or end of the file non-sparse via set_sparse is harmless.
1420                  */
1421                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1422                         return -EOPNOTSUPP;
1423
1424                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1425         }
1426         /* BB: else ... in future add code to extend file and set sparse */
1427
1428
1429         free_xid(xid);
1430         return rc;
1431 }
1432
1433
1434 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1435                            loff_t off, loff_t len)
1436 {
1437         /* KEEP_SIZE already checked for by do_fallocate */
1438         if (mode & FALLOC_FL_PUNCH_HOLE)
1439                 return smb3_punch_hole(file, tcon, off, len);
1440         else if (mode & FALLOC_FL_ZERO_RANGE) {
1441                 if (mode & FALLOC_FL_KEEP_SIZE)
1442                         return smb3_zero_range(file, tcon, off, len, true);
1443                 return smb3_zero_range(file, tcon, off, len, false);
1444         } else if (mode == FALLOC_FL_KEEP_SIZE)
1445                 return smb3_simple_falloc(file, tcon, off, len, true);
1446         else if (mode == 0)
1447                 return smb3_simple_falloc(file, tcon, off, len, false);
1448
1449         return -EOPNOTSUPP;
1450 }
1451
1452 static void
1453 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1454                         struct cifsInodeInfo *cinode, bool set_level2)
1455 {
1456         if (set_level2)
1457                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1458                                                 0, NULL);
1459         else
1460                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1461 }
1462
1463 static void
1464 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1465                       unsigned int epoch, bool *purge_cache)
1466 {
1467         oplock &= 0xFF;
1468         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1469                 return;
1470         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1471                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1472                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1473                          &cinode->vfs_inode);
1474         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1475                 cinode->oplock = CIFS_CACHE_RW_FLG;
1476                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1477                          &cinode->vfs_inode);
1478         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1479                 cinode->oplock = CIFS_CACHE_READ_FLG;
1480                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1481                          &cinode->vfs_inode);
1482         } else
1483                 cinode->oplock = 0;
1484 }
1485
1486 static void
1487 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1488                        unsigned int epoch, bool *purge_cache)
1489 {
1490         char message[5] = {0};
1491
1492         oplock &= 0xFF;
1493         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1494                 return;
1495
1496         cinode->oplock = 0;
1497         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1498                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1499                 strcat(message, "R");
1500         }
1501         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1502                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1503                 strcat(message, "H");
1504         }
1505         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1506                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1507                 strcat(message, "W");
1508         }
1509         if (!cinode->oplock)
1510                 strcat(message, "None");
1511         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1512                  &cinode->vfs_inode);
1513 }
1514
1515 static void
1516 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1517                       unsigned int epoch, bool *purge_cache)
1518 {
1519         unsigned int old_oplock = cinode->oplock;
1520
1521         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1522
1523         if (purge_cache) {
1524                 *purge_cache = false;
1525                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1526                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1527                             (epoch - cinode->epoch > 0))
1528                                 *purge_cache = true;
1529                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1530                                  (epoch - cinode->epoch > 1))
1531                                 *purge_cache = true;
1532                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1533                                  (epoch - cinode->epoch > 1))
1534                                 *purge_cache = true;
1535                         else if (cinode->oplock == 0 &&
1536                                  (epoch - cinode->epoch > 0))
1537                                 *purge_cache = true;
1538                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1539                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1540                             (epoch - cinode->epoch > 0))
1541                                 *purge_cache = true;
1542                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1543                                  (epoch - cinode->epoch > 1))
1544                                 *purge_cache = true;
1545                 }
1546                 cinode->epoch = epoch;
1547         }
1548 }
1549
1550 static bool
1551 smb2_is_read_op(__u32 oplock)
1552 {
1553         return oplock == SMB2_OPLOCK_LEVEL_II;
1554 }
1555
1556 static bool
1557 smb21_is_read_op(__u32 oplock)
1558 {
1559         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1560                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1561 }
1562
1563 static __le32
1564 map_oplock_to_lease(u8 oplock)
1565 {
1566         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1567                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1568         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1569                 return SMB2_LEASE_READ_CACHING;
1570         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1571                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1572                        SMB2_LEASE_WRITE_CACHING;
1573         return 0;
1574 }
1575
1576 static char *
1577 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1578 {
1579         struct create_lease *buf;
1580
1581         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1582         if (!buf)
1583                 return NULL;
1584
1585         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1586         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1587         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1588
1589         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1590                                         (struct create_lease, lcontext));
1591         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1592         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1593                                 (struct create_lease, Name));
1594         buf->ccontext.NameLength = cpu_to_le16(4);
1595         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1596         buf->Name[0] = 'R';
1597         buf->Name[1] = 'q';
1598         buf->Name[2] = 'L';
1599         buf->Name[3] = 's';
1600         return (char *)buf;
1601 }
1602
1603 static char *
1604 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1605 {
1606         struct create_lease_v2 *buf;
1607
1608         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1609         if (!buf)
1610                 return NULL;
1611
1612         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1613         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1614         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1615
1616         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1617                                         (struct create_lease_v2, lcontext));
1618         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1619         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1620                                 (struct create_lease_v2, Name));
1621         buf->ccontext.NameLength = cpu_to_le16(4);
1622         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1623         buf->Name[0] = 'R';
1624         buf->Name[1] = 'q';
1625         buf->Name[2] = 'L';
1626         buf->Name[3] = 's';
1627         return (char *)buf;
1628 }
1629
1630 static __u8
1631 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1632 {
1633         struct create_lease *lc = (struct create_lease *)buf;
1634
1635         *epoch = 0; /* not used */
1636         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1637                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1638         return le32_to_cpu(lc->lcontext.LeaseState);
1639 }
1640
1641 static __u8
1642 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1643 {
1644         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1645
1646         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1647         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1648                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1649         return le32_to_cpu(lc->lcontext.LeaseState);
1650 }
1651
1652 static unsigned int
1653 smb2_wp_retry_size(struct inode *inode)
1654 {
1655         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1656                      SMB2_MAX_BUFFER_SIZE);
1657 }
1658
1659 static bool
1660 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1661 {
1662         return !cfile->invalidHandle;
1663 }
1664
1665 static void
1666 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
1667 {
1668         struct smb2_sync_hdr *shdr =
1669                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
1670         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
1671
1672         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
1673         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
1674         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
1675         tr_hdr->Flags = cpu_to_le16(0x01);
1676         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1677         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
1678         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
1679         inc_rfc1001_len(tr_hdr, orig_len);
1680 }
1681
1682 static struct scatterlist *
1683 init_sg(struct smb_rqst *rqst, u8 *sign)
1684 {
1685         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
1686         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1687         struct scatterlist *sg;
1688         unsigned int i;
1689         unsigned int j;
1690
1691         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
1692         if (!sg)
1693                 return NULL;
1694
1695         sg_init_table(sg, sg_len);
1696         sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
1697         for (i = 1; i < rqst->rq_nvec; i++)
1698                 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
1699                                                 rqst->rq_iov[i].iov_len);
1700         for (j = 0; i < sg_len - 1; i++, j++) {
1701                 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
1702                                                         : rqst->rq_tailsz;
1703                 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
1704         }
1705         sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
1706         return sg;
1707 }
1708
1709 struct cifs_crypt_result {
1710         int err;
1711         struct completion completion;
1712 };
1713
1714 static void cifs_crypt_complete(struct crypto_async_request *req, int err)
1715 {
1716         struct cifs_crypt_result *res = req->data;
1717
1718         if (err == -EINPROGRESS)
1719                 return;
1720
1721         res->err = err;
1722         complete(&res->completion);
1723 }
1724
1725 static int
1726 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
1727 {
1728         struct cifs_ses *ses;
1729         u8 *ses_enc_key;
1730
1731         spin_lock(&cifs_tcp_ses_lock);
1732         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1733                 if (ses->Suid != ses_id)
1734                         continue;
1735                 ses_enc_key = enc ? ses->smb3encryptionkey :
1736                                                         ses->smb3decryptionkey;
1737                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
1738                 spin_unlock(&cifs_tcp_ses_lock);
1739                 return 0;
1740         }
1741         spin_unlock(&cifs_tcp_ses_lock);
1742
1743         return 1;
1744 }
1745 /*
1746  * Encrypt or decrypt @rqst message. @rqst has the following format:
1747  * iov[0] - transform header (associate data),
1748  * iov[1-N] and pages - data to encrypt.
1749  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
1750  * untouched.
1751  */
1752 static int
1753 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
1754 {
1755         struct smb2_transform_hdr *tr_hdr =
1756                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
1757         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1758         int rc = 0;
1759         struct scatterlist *sg;
1760         u8 sign[SMB2_SIGNATURE_SIZE] = {};
1761         u8 key[SMB3_SIGN_KEY_SIZE];
1762         struct aead_request *req;
1763         char *iv;
1764         unsigned int iv_len;
1765         struct cifs_crypt_result result = {0, };
1766         struct crypto_aead *tfm;
1767         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
1768
1769         init_completion(&result.completion);
1770
1771         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
1772         if (rc) {
1773                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
1774                          enc ? "en" : "de");
1775                 return 0;
1776         }
1777
1778         rc = smb3_crypto_aead_allocate(server);
1779         if (rc) {
1780                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
1781                 return rc;
1782         }
1783
1784         tfm = enc ? server->secmech.ccmaesencrypt :
1785                                                 server->secmech.ccmaesdecrypt;
1786         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
1787         if (rc) {
1788                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
1789                 return rc;
1790         }
1791
1792         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
1793         if (rc) {
1794                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
1795                 return rc;
1796         }
1797
1798         req = aead_request_alloc(tfm, GFP_KERNEL);
1799         if (!req) {
1800                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
1801                 return -ENOMEM;
1802         }
1803
1804         if (!enc) {
1805                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
1806                 crypt_len += SMB2_SIGNATURE_SIZE;
1807         }
1808
1809         sg = init_sg(rqst, sign);
1810         if (!sg) {
1811                 cifs_dbg(VFS, "%s: Failed to init sg %d", __func__, rc);
1812                 goto free_req;
1813         }
1814
1815         iv_len = crypto_aead_ivsize(tfm);
1816         iv = kzalloc(iv_len, GFP_KERNEL);
1817         if (!iv) {
1818                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
1819                 goto free_sg;
1820         }
1821         iv[0] = 3;
1822         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1823
1824         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
1825         aead_request_set_ad(req, assoc_data_len);
1826
1827         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1828                                   cifs_crypt_complete, &result);
1829
1830         rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
1831
1832         if (rc == -EINPROGRESS || rc == -EBUSY) {
1833                 wait_for_completion(&result.completion);
1834                 rc = result.err;
1835         }
1836
1837         if (!rc && enc)
1838                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
1839
1840         kfree(iv);
1841 free_sg:
1842         kfree(sg);
1843 free_req:
1844         kfree(req);
1845         return rc;
1846 }
1847
1848 static int
1849 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
1850                        struct smb_rqst *old_rq)
1851 {
1852         struct kvec *iov;
1853         struct page **pages;
1854         struct smb2_transform_hdr *tr_hdr;
1855         unsigned int npages = old_rq->rq_npages;
1856         int i;
1857         int rc = -ENOMEM;
1858
1859         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1860         if (!pages)
1861                 return rc;
1862
1863         new_rq->rq_pages = pages;
1864         new_rq->rq_npages = old_rq->rq_npages;
1865         new_rq->rq_pagesz = old_rq->rq_pagesz;
1866         new_rq->rq_tailsz = old_rq->rq_tailsz;
1867
1868         for (i = 0; i < npages; i++) {
1869                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
1870                 if (!pages[i])
1871                         goto err_free_pages;
1872         }
1873
1874         iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
1875         if (!iov)
1876                 goto err_free_pages;
1877
1878         /* copy all iovs from the old except the 1st one (rfc1002 length) */
1879         memcpy(&iov[1], &old_rq->rq_iov[1],
1880                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
1881         new_rq->rq_iov = iov;
1882         new_rq->rq_nvec = old_rq->rq_nvec;
1883
1884         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
1885         if (!tr_hdr)
1886                 goto err_free_iov;
1887
1888         /* fill the 1st iov with a transform header */
1889         fill_transform_hdr(tr_hdr, old_rq);
1890         new_rq->rq_iov[0].iov_base = tr_hdr;
1891         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1892
1893         /* copy pages form the old */
1894         for (i = 0; i < npages; i++) {
1895                 char *dst = kmap(new_rq->rq_pages[i]);
1896                 char *src = kmap(old_rq->rq_pages[i]);
1897                 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
1898                                                         new_rq->rq_tailsz;
1899                 memcpy(dst, src, len);
1900                 kunmap(new_rq->rq_pages[i]);
1901                 kunmap(old_rq->rq_pages[i]);
1902         }
1903
1904         rc = crypt_message(server, new_rq, 1);
1905         cifs_dbg(FYI, "encrypt message returned %d", rc);
1906         if (rc)
1907                 goto err_free_tr_hdr;
1908
1909         return rc;
1910
1911 err_free_tr_hdr:
1912         kfree(tr_hdr);
1913 err_free_iov:
1914         kfree(iov);
1915 err_free_pages:
1916         for (i = i - 1; i >= 0; i--)
1917                 put_page(pages[i]);
1918         kfree(pages);
1919         return rc;
1920 }
1921
1922 static void
1923 smb3_free_transform_rq(struct smb_rqst *rqst)
1924 {
1925         int i = rqst->rq_npages - 1;
1926
1927         for (; i >= 0; i--)
1928                 put_page(rqst->rq_pages[i]);
1929         kfree(rqst->rq_pages);
1930         /* free transform header */
1931         kfree(rqst->rq_iov[0].iov_base);
1932         kfree(rqst->rq_iov);
1933 }
1934
1935 static int
1936 smb3_is_transform_hdr(void *buf)
1937 {
1938         struct smb2_transform_hdr *trhdr = buf;
1939
1940         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
1941 }
1942
1943 static int
1944 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
1945                  unsigned int buf_data_size, struct page **pages,
1946                  unsigned int npages, unsigned int page_data_size)
1947 {
1948         struct kvec iov[2];
1949         struct smb_rqst rqst = {NULL};
1950         struct smb2_hdr *hdr;
1951         int rc;
1952
1953         iov[0].iov_base = buf;
1954         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1955         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
1956         iov[1].iov_len = buf_data_size;
1957
1958         rqst.rq_iov = iov;
1959         rqst.rq_nvec = 2;
1960         rqst.rq_pages = pages;
1961         rqst.rq_npages = npages;
1962         rqst.rq_pagesz = PAGE_SIZE;
1963         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
1964
1965         rc = crypt_message(server, &rqst, 0);
1966         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
1967
1968         if (rc)
1969                 return rc;
1970
1971         memmove(buf + 4, iov[1].iov_base, buf_data_size);
1972         hdr = (struct smb2_hdr *)buf;
1973         hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
1974         server->total_read = buf_data_size + page_data_size + 4;
1975
1976         return rc;
1977 }
1978
1979 static int
1980 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
1981                      unsigned int npages, unsigned int len)
1982 {
1983         int i;
1984         int length;
1985
1986         for (i = 0; i < npages; i++) {
1987                 struct page *page = pages[i];
1988                 size_t n;
1989
1990                 n = len;
1991                 if (len >= PAGE_SIZE) {
1992                         /* enough data to fill the page */
1993                         n = PAGE_SIZE;
1994                         len -= n;
1995                 } else {
1996                         zero_user(page, len, PAGE_SIZE - len);
1997                         len = 0;
1998                 }
1999                 length = cifs_read_page_from_socket(server, page, n);
2000                 if (length < 0)
2001                         return length;
2002                 server->total_read += length;
2003         }
2004
2005         return 0;
2006 }
2007
2008 static int
2009 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2010                unsigned int cur_off, struct bio_vec **page_vec)
2011 {
2012         struct bio_vec *bvec;
2013         int i;
2014
2015         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2016         if (!bvec)
2017                 return -ENOMEM;
2018
2019         for (i = 0; i < npages; i++) {
2020                 bvec[i].bv_page = pages[i];
2021                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2022                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2023                 data_size -= bvec[i].bv_len;
2024         }
2025
2026         if (data_size != 0) {
2027                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2028                 kfree(bvec);
2029                 return -EIO;
2030         }
2031
2032         *page_vec = bvec;
2033         return 0;
2034 }
2035
2036 static int
2037 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2038                  char *buf, unsigned int buf_len, struct page **pages,
2039                  unsigned int npages, unsigned int page_data_size)
2040 {
2041         unsigned int data_offset;
2042         unsigned int data_len;
2043         unsigned int cur_off;
2044         unsigned int cur_page_idx;
2045         unsigned int pad_len;
2046         struct cifs_readdata *rdata = mid->callback_data;
2047         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2048         struct bio_vec *bvec = NULL;
2049         struct iov_iter iter;
2050         struct kvec iov;
2051         int length;
2052
2053         if (shdr->Command != SMB2_READ) {
2054                 cifs_dbg(VFS, "only big read responses are supported\n");
2055                 return -ENOTSUPP;
2056         }
2057
2058         if (server->ops->is_status_pending &&
2059                         server->ops->is_status_pending(buf, server, 0))
2060                 return -1;
2061
2062         rdata->result = server->ops->map_error(buf, false);
2063         if (rdata->result != 0) {
2064                 cifs_dbg(FYI, "%s: server returned error %d\n",
2065                          __func__, rdata->result);
2066                 dequeue_mid(mid, rdata->result);
2067                 return 0;
2068         }
2069
2070         data_offset = server->ops->read_data_offset(buf) + 4;
2071         data_len = server->ops->read_data_length(buf);
2072
2073         if (data_offset < server->vals->read_rsp_size) {
2074                 /*
2075                  * win2k8 sometimes sends an offset of 0 when the read
2076                  * is beyond the EOF. Treat it as if the data starts just after
2077                  * the header.
2078                  */
2079                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2080                          __func__, data_offset);
2081                 data_offset = server->vals->read_rsp_size;
2082         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2083                 /* data_offset is beyond the end of smallbuf */
2084                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2085                          __func__, data_offset);
2086                 rdata->result = -EIO;
2087                 dequeue_mid(mid, rdata->result);
2088                 return 0;
2089         }
2090
2091         pad_len = data_offset - server->vals->read_rsp_size;
2092
2093         if (buf_len <= data_offset) {
2094                 /* read response payload is in pages */
2095                 cur_page_idx = pad_len / PAGE_SIZE;
2096                 cur_off = pad_len % PAGE_SIZE;
2097
2098                 if (cur_page_idx != 0) {
2099                         /* data offset is beyond the 1st page of response */
2100                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2101                                  __func__, data_offset);
2102                         rdata->result = -EIO;
2103                         dequeue_mid(mid, rdata->result);
2104                         return 0;
2105                 }
2106
2107                 if (data_len > page_data_size - pad_len) {
2108                         /* data_len is corrupt -- discard frame */
2109                         rdata->result = -EIO;
2110                         dequeue_mid(mid, rdata->result);
2111                         return 0;
2112                 }
2113
2114                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2115                                                cur_off, &bvec);
2116                 if (rdata->result != 0) {
2117                         dequeue_mid(mid, rdata->result);
2118                         return 0;
2119                 }
2120
2121                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2122         } else if (buf_len >= data_offset + data_len) {
2123                 /* read response payload is in buf */
2124                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2125                 iov.iov_base = buf + data_offset;
2126                 iov.iov_len = data_len;
2127                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2128         } else {
2129                 /* read response payload cannot be in both buf and pages */
2130                 WARN_ONCE(1, "buf can not contain only a part of read data");
2131                 rdata->result = -EIO;
2132                 dequeue_mid(mid, rdata->result);
2133                 return 0;
2134         }
2135
2136         /* set up first iov for signature check */
2137         rdata->iov[0].iov_base = buf;
2138         rdata->iov[0].iov_len = 4;
2139         rdata->iov[1].iov_base = buf + 4;
2140         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2141         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2142                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2143
2144         length = rdata->copy_into_pages(server, rdata, &iter);
2145
2146         kfree(bvec);
2147
2148         if (length < 0)
2149                 return length;
2150
2151         dequeue_mid(mid, false);
2152         return length;
2153 }
2154
2155 static int
2156 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2157 {
2158         char *buf = server->smallbuf;
2159         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2160         unsigned int npages;
2161         struct page **pages;
2162         unsigned int len;
2163         unsigned int buflen = get_rfc1002_length(buf) + 4;
2164         int rc;
2165         int i = 0;
2166
2167         len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2168                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2169
2170         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2171         if (rc < 0)
2172                 return rc;
2173         server->total_read += rc;
2174
2175         len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2176                                                 server->vals->read_rsp_size;
2177         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2178
2179         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2180         if (!pages) {
2181                 rc = -ENOMEM;
2182                 goto discard_data;
2183         }
2184
2185         for (; i < npages; i++) {
2186                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2187                 if (!pages[i]) {
2188                         rc = -ENOMEM;
2189                         goto discard_data;
2190                 }
2191         }
2192
2193         /* read read data into pages */
2194         rc = read_data_into_pages(server, pages, npages, len);
2195         if (rc)
2196                 goto free_pages;
2197
2198         rc = cifs_discard_remaining_data(server, buf);
2199         if (rc)
2200                 goto free_pages;
2201
2202         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2203                               pages, npages, len);
2204         if (rc)
2205                 goto free_pages;
2206
2207         *mid = smb2_find_mid(server, buf);
2208         if (*mid == NULL)
2209                 cifs_dbg(FYI, "mid not found\n");
2210         else {
2211                 cifs_dbg(FYI, "mid found\n");
2212                 (*mid)->decrypted = true;
2213                 rc = handle_read_data(server, *mid, buf,
2214                                       server->vals->read_rsp_size,
2215                                       pages, npages, len);
2216         }
2217
2218 free_pages:
2219         for (i = i - 1; i >= 0; i--)
2220                 put_page(pages[i]);
2221         kfree(pages);
2222         return rc;
2223 discard_data:
2224         cifs_discard_remaining_data(server, buf);
2225         goto free_pages;
2226 }
2227
2228 static int
2229 receive_encrypted_standard(struct TCP_Server_Info *server,
2230                            struct mid_q_entry **mid)
2231 {
2232         int length;
2233         char *buf = server->smallbuf;
2234         unsigned int pdu_length = get_rfc1002_length(buf);
2235         unsigned int buf_size;
2236         struct mid_q_entry *mid_entry;
2237
2238         /* switch to large buffer if too big for a small one */
2239         if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2240                 server->large_buf = true;
2241                 memcpy(server->bigbuf, buf, server->total_read);
2242                 buf = server->bigbuf;
2243         }
2244
2245         /* now read the rest */
2246         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2247                                 pdu_length - HEADER_SIZE(server) + 1 + 4);
2248         if (length < 0)
2249                 return length;
2250         server->total_read += length;
2251
2252         buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2253         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2254         if (length)
2255                 return length;
2256
2257         mid_entry = smb2_find_mid(server, buf);
2258         if (mid_entry == NULL)
2259                 cifs_dbg(FYI, "mid not found\n");
2260         else {
2261                 cifs_dbg(FYI, "mid found\n");
2262                 mid_entry->decrypted = true;
2263         }
2264
2265         *mid = mid_entry;
2266
2267         if (mid_entry && mid_entry->handle)
2268                 return mid_entry->handle(server, mid_entry);
2269
2270         return cifs_handle_standard(server, mid_entry);
2271 }
2272
2273 static int
2274 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2275 {
2276         char *buf = server->smallbuf;
2277         unsigned int pdu_length = get_rfc1002_length(buf);
2278         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2279         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2280
2281         if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2282                                                 sizeof(struct smb2_sync_hdr)) {
2283                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2284                          pdu_length);
2285                 cifs_reconnect(server);
2286                 wake_up(&server->response_q);
2287                 return -ECONNABORTED;
2288         }
2289
2290         if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2291                 cifs_dbg(VFS, "Transform message is broken\n");
2292                 cifs_reconnect(server);
2293                 wake_up(&server->response_q);
2294                 return -ECONNABORTED;
2295         }
2296
2297         if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2298                 return receive_encrypted_read(server, mid);
2299
2300         return receive_encrypted_standard(server, mid);
2301 }
2302
2303 int
2304 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2305 {
2306         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2307
2308         return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2309                                 NULL, 0, 0);
2310 }
2311
2312 struct smb_version_operations smb20_operations = {
2313         .compare_fids = smb2_compare_fids,
2314         .setup_request = smb2_setup_request,
2315         .setup_async_request = smb2_setup_async_request,
2316         .check_receive = smb2_check_receive,
2317         .add_credits = smb2_add_credits,
2318         .set_credits = smb2_set_credits,
2319         .get_credits_field = smb2_get_credits_field,
2320         .get_credits = smb2_get_credits,
2321         .wait_mtu_credits = cifs_wait_mtu_credits,
2322         .get_next_mid = smb2_get_next_mid,
2323         .read_data_offset = smb2_read_data_offset,
2324         .read_data_length = smb2_read_data_length,
2325         .map_error = map_smb2_to_linux_error,
2326         .find_mid = smb2_find_mid,
2327         .check_message = smb2_check_message,
2328         .dump_detail = smb2_dump_detail,
2329         .clear_stats = smb2_clear_stats,
2330         .print_stats = smb2_print_stats,
2331         .is_oplock_break = smb2_is_valid_oplock_break,
2332         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2333         .downgrade_oplock = smb2_downgrade_oplock,
2334         .need_neg = smb2_need_neg,
2335         .negotiate = smb2_negotiate,
2336         .negotiate_wsize = smb2_negotiate_wsize,
2337         .negotiate_rsize = smb2_negotiate_rsize,
2338         .sess_setup = SMB2_sess_setup,
2339         .logoff = SMB2_logoff,
2340         .tree_connect = SMB2_tcon,
2341         .tree_disconnect = SMB2_tdis,
2342         .qfs_tcon = smb2_qfs_tcon,
2343         .is_path_accessible = smb2_is_path_accessible,
2344         .can_echo = smb2_can_echo,
2345         .echo = SMB2_echo,
2346         .query_path_info = smb2_query_path_info,
2347         .get_srv_inum = smb2_get_srv_inum,
2348         .query_file_info = smb2_query_file_info,
2349         .set_path_size = smb2_set_path_size,
2350         .set_file_size = smb2_set_file_size,
2351         .set_file_info = smb2_set_file_info,
2352         .set_compression = smb2_set_compression,
2353         .mkdir = smb2_mkdir,
2354         .mkdir_setinfo = smb2_mkdir_setinfo,
2355         .rmdir = smb2_rmdir,
2356         .unlink = smb2_unlink,
2357         .rename = smb2_rename_path,
2358         .create_hardlink = smb2_create_hardlink,
2359         .query_symlink = smb2_query_symlink,
2360         .query_mf_symlink = smb3_query_mf_symlink,
2361         .create_mf_symlink = smb3_create_mf_symlink,
2362         .open = smb2_open_file,
2363         .set_fid = smb2_set_fid,
2364         .close = smb2_close_file,
2365         .flush = smb2_flush_file,
2366         .async_readv = smb2_async_readv,
2367         .async_writev = smb2_async_writev,
2368         .sync_read = smb2_sync_read,
2369         .sync_write = smb2_sync_write,
2370         .query_dir_first = smb2_query_dir_first,
2371         .query_dir_next = smb2_query_dir_next,
2372         .close_dir = smb2_close_dir,
2373         .calc_smb_size = smb2_calc_size,
2374         .is_status_pending = smb2_is_status_pending,
2375         .oplock_response = smb2_oplock_response,
2376         .queryfs = smb2_queryfs,
2377         .mand_lock = smb2_mand_lock,
2378         .mand_unlock_range = smb2_unlock_range,
2379         .push_mand_locks = smb2_push_mandatory_locks,
2380         .get_lease_key = smb2_get_lease_key,
2381         .set_lease_key = smb2_set_lease_key,
2382         .new_lease_key = smb2_new_lease_key,
2383         .calc_signature = smb2_calc_signature,
2384         .is_read_op = smb2_is_read_op,
2385         .set_oplock_level = smb2_set_oplock_level,
2386         .create_lease_buf = smb2_create_lease_buf,
2387         .parse_lease_buf = smb2_parse_lease_buf,
2388         .copychunk_range = smb2_copychunk_range,
2389         .wp_retry_size = smb2_wp_retry_size,
2390         .dir_needs_close = smb2_dir_needs_close,
2391         .get_dfs_refer = smb2_get_dfs_refer,
2392         .select_sectype = smb2_select_sectype,
2393 };
2394
2395 struct smb_version_operations smb21_operations = {
2396         .compare_fids = smb2_compare_fids,
2397         .setup_request = smb2_setup_request,
2398         .setup_async_request = smb2_setup_async_request,
2399         .check_receive = smb2_check_receive,
2400         .add_credits = smb2_add_credits,
2401         .set_credits = smb2_set_credits,
2402         .get_credits_field = smb2_get_credits_field,
2403         .get_credits = smb2_get_credits,
2404         .wait_mtu_credits = smb2_wait_mtu_credits,
2405         .get_next_mid = smb2_get_next_mid,
2406         .read_data_offset = smb2_read_data_offset,
2407         .read_data_length = smb2_read_data_length,
2408         .map_error = map_smb2_to_linux_error,
2409         .find_mid = smb2_find_mid,
2410         .check_message = smb2_check_message,
2411         .dump_detail = smb2_dump_detail,
2412         .clear_stats = smb2_clear_stats,
2413         .print_stats = smb2_print_stats,
2414         .is_oplock_break = smb2_is_valid_oplock_break,
2415         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2416         .downgrade_oplock = smb2_downgrade_oplock,
2417         .need_neg = smb2_need_neg,
2418         .negotiate = smb2_negotiate,
2419         .negotiate_wsize = smb2_negotiate_wsize,
2420         .negotiate_rsize = smb2_negotiate_rsize,
2421         .sess_setup = SMB2_sess_setup,
2422         .logoff = SMB2_logoff,
2423         .tree_connect = SMB2_tcon,
2424         .tree_disconnect = SMB2_tdis,
2425         .qfs_tcon = smb2_qfs_tcon,
2426         .is_path_accessible = smb2_is_path_accessible,
2427         .can_echo = smb2_can_echo,
2428         .echo = SMB2_echo,
2429         .query_path_info = smb2_query_path_info,
2430         .get_srv_inum = smb2_get_srv_inum,
2431         .query_file_info = smb2_query_file_info,
2432         .set_path_size = smb2_set_path_size,
2433         .set_file_size = smb2_set_file_size,
2434         .set_file_info = smb2_set_file_info,
2435         .set_compression = smb2_set_compression,
2436         .mkdir = smb2_mkdir,
2437         .mkdir_setinfo = smb2_mkdir_setinfo,
2438         .rmdir = smb2_rmdir,
2439         .unlink = smb2_unlink,
2440         .rename = smb2_rename_path,
2441         .create_hardlink = smb2_create_hardlink,
2442         .query_symlink = smb2_query_symlink,
2443         .query_mf_symlink = smb3_query_mf_symlink,
2444         .create_mf_symlink = smb3_create_mf_symlink,
2445         .open = smb2_open_file,
2446         .set_fid = smb2_set_fid,
2447         .close = smb2_close_file,
2448         .flush = smb2_flush_file,
2449         .async_readv = smb2_async_readv,
2450         .async_writev = smb2_async_writev,
2451         .sync_read = smb2_sync_read,
2452         .sync_write = smb2_sync_write,
2453         .query_dir_first = smb2_query_dir_first,
2454         .query_dir_next = smb2_query_dir_next,
2455         .close_dir = smb2_close_dir,
2456         .calc_smb_size = smb2_calc_size,
2457         .is_status_pending = smb2_is_status_pending,
2458         .oplock_response = smb2_oplock_response,
2459         .queryfs = smb2_queryfs,
2460         .mand_lock = smb2_mand_lock,
2461         .mand_unlock_range = smb2_unlock_range,
2462         .push_mand_locks = smb2_push_mandatory_locks,
2463         .get_lease_key = smb2_get_lease_key,
2464         .set_lease_key = smb2_set_lease_key,
2465         .new_lease_key = smb2_new_lease_key,
2466         .calc_signature = smb2_calc_signature,
2467         .is_read_op = smb21_is_read_op,
2468         .set_oplock_level = smb21_set_oplock_level,
2469         .create_lease_buf = smb2_create_lease_buf,
2470         .parse_lease_buf = smb2_parse_lease_buf,
2471         .copychunk_range = smb2_copychunk_range,
2472         .wp_retry_size = smb2_wp_retry_size,
2473         .dir_needs_close = smb2_dir_needs_close,
2474         .enum_snapshots = smb3_enum_snapshots,
2475         .get_dfs_refer = smb2_get_dfs_refer,
2476         .select_sectype = smb2_select_sectype,
2477 };
2478
2479 struct smb_version_operations smb30_operations = {
2480         .compare_fids = smb2_compare_fids,
2481         .setup_request = smb2_setup_request,
2482         .setup_async_request = smb2_setup_async_request,
2483         .check_receive = smb2_check_receive,
2484         .add_credits = smb2_add_credits,
2485         .set_credits = smb2_set_credits,
2486         .get_credits_field = smb2_get_credits_field,
2487         .get_credits = smb2_get_credits,
2488         .wait_mtu_credits = smb2_wait_mtu_credits,
2489         .get_next_mid = smb2_get_next_mid,
2490         .read_data_offset = smb2_read_data_offset,
2491         .read_data_length = smb2_read_data_length,
2492         .map_error = map_smb2_to_linux_error,
2493         .find_mid = smb2_find_mid,
2494         .check_message = smb2_check_message,
2495         .dump_detail = smb2_dump_detail,
2496         .clear_stats = smb2_clear_stats,
2497         .print_stats = smb2_print_stats,
2498         .dump_share_caps = smb2_dump_share_caps,
2499         .is_oplock_break = smb2_is_valid_oplock_break,
2500         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2501         .downgrade_oplock = smb2_downgrade_oplock,
2502         .need_neg = smb2_need_neg,
2503         .negotiate = smb2_negotiate,
2504         .negotiate_wsize = smb2_negotiate_wsize,
2505         .negotiate_rsize = smb2_negotiate_rsize,
2506         .sess_setup = SMB2_sess_setup,
2507         .logoff = SMB2_logoff,
2508         .tree_connect = SMB2_tcon,
2509         .tree_disconnect = SMB2_tdis,
2510         .qfs_tcon = smb3_qfs_tcon,
2511         .is_path_accessible = smb2_is_path_accessible,
2512         .can_echo = smb2_can_echo,
2513         .echo = SMB2_echo,
2514         .query_path_info = smb2_query_path_info,
2515         .get_srv_inum = smb2_get_srv_inum,
2516         .query_file_info = smb2_query_file_info,
2517         .set_path_size = smb2_set_path_size,
2518         .set_file_size = smb2_set_file_size,
2519         .set_file_info = smb2_set_file_info,
2520         .set_compression = smb2_set_compression,
2521         .mkdir = smb2_mkdir,
2522         .mkdir_setinfo = smb2_mkdir_setinfo,
2523         .rmdir = smb2_rmdir,
2524         .unlink = smb2_unlink,
2525         .rename = smb2_rename_path,
2526         .create_hardlink = smb2_create_hardlink,
2527         .query_symlink = smb2_query_symlink,
2528         .query_mf_symlink = smb3_query_mf_symlink,
2529         .create_mf_symlink = smb3_create_mf_symlink,
2530         .open = smb2_open_file,
2531         .set_fid = smb2_set_fid,
2532         .close = smb2_close_file,
2533         .flush = smb2_flush_file,
2534         .async_readv = smb2_async_readv,
2535         .async_writev = smb2_async_writev,
2536         .sync_read = smb2_sync_read,
2537         .sync_write = smb2_sync_write,
2538         .query_dir_first = smb2_query_dir_first,
2539         .query_dir_next = smb2_query_dir_next,
2540         .close_dir = smb2_close_dir,
2541         .calc_smb_size = smb2_calc_size,
2542         .is_status_pending = smb2_is_status_pending,
2543         .oplock_response = smb2_oplock_response,
2544         .queryfs = smb2_queryfs,
2545         .mand_lock = smb2_mand_lock,
2546         .mand_unlock_range = smb2_unlock_range,
2547         .push_mand_locks = smb2_push_mandatory_locks,
2548         .get_lease_key = smb2_get_lease_key,
2549         .set_lease_key = smb2_set_lease_key,
2550         .new_lease_key = smb2_new_lease_key,
2551         .generate_signingkey = generate_smb30signingkey,
2552         .calc_signature = smb3_calc_signature,
2553         .set_integrity  = smb3_set_integrity,
2554         .is_read_op = smb21_is_read_op,
2555         .set_oplock_level = smb3_set_oplock_level,
2556         .create_lease_buf = smb3_create_lease_buf,
2557         .parse_lease_buf = smb3_parse_lease_buf,
2558         .copychunk_range = smb2_copychunk_range,
2559         .duplicate_extents = smb2_duplicate_extents,
2560         .validate_negotiate = smb3_validate_negotiate,
2561         .wp_retry_size = smb2_wp_retry_size,
2562         .dir_needs_close = smb2_dir_needs_close,
2563         .fallocate = smb3_fallocate,
2564         .enum_snapshots = smb3_enum_snapshots,
2565         .init_transform_rq = smb3_init_transform_rq,
2566         .free_transform_rq = smb3_free_transform_rq,
2567         .is_transform_hdr = smb3_is_transform_hdr,
2568         .receive_transform = smb3_receive_transform,
2569         .get_dfs_refer = smb2_get_dfs_refer,
2570         .select_sectype = smb2_select_sectype,
2571 };
2572
2573 #ifdef CONFIG_CIFS_SMB311
2574 struct smb_version_operations smb311_operations = {
2575         .compare_fids = smb2_compare_fids,
2576         .setup_request = smb2_setup_request,
2577         .setup_async_request = smb2_setup_async_request,
2578         .check_receive = smb2_check_receive,
2579         .add_credits = smb2_add_credits,
2580         .set_credits = smb2_set_credits,
2581         .get_credits_field = smb2_get_credits_field,
2582         .get_credits = smb2_get_credits,
2583         .wait_mtu_credits = smb2_wait_mtu_credits,
2584         .get_next_mid = smb2_get_next_mid,
2585         .read_data_offset = smb2_read_data_offset,
2586         .read_data_length = smb2_read_data_length,
2587         .map_error = map_smb2_to_linux_error,
2588         .find_mid = smb2_find_mid,
2589         .check_message = smb2_check_message,
2590         .dump_detail = smb2_dump_detail,
2591         .clear_stats = smb2_clear_stats,
2592         .print_stats = smb2_print_stats,
2593         .dump_share_caps = smb2_dump_share_caps,
2594         .is_oplock_break = smb2_is_valid_oplock_break,
2595         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2596         .downgrade_oplock = smb2_downgrade_oplock,
2597         .need_neg = smb2_need_neg,
2598         .negotiate = smb2_negotiate,
2599         .negotiate_wsize = smb2_negotiate_wsize,
2600         .negotiate_rsize = smb2_negotiate_rsize,
2601         .sess_setup = SMB2_sess_setup,
2602         .logoff = SMB2_logoff,
2603         .tree_connect = SMB2_tcon,
2604         .tree_disconnect = SMB2_tdis,
2605         .qfs_tcon = smb3_qfs_tcon,
2606         .is_path_accessible = smb2_is_path_accessible,
2607         .can_echo = smb2_can_echo,
2608         .echo = SMB2_echo,
2609         .query_path_info = smb2_query_path_info,
2610         .get_srv_inum = smb2_get_srv_inum,
2611         .query_file_info = smb2_query_file_info,
2612         .set_path_size = smb2_set_path_size,
2613         .set_file_size = smb2_set_file_size,
2614         .set_file_info = smb2_set_file_info,
2615         .set_compression = smb2_set_compression,
2616         .mkdir = smb2_mkdir,
2617         .mkdir_setinfo = smb2_mkdir_setinfo,
2618         .rmdir = smb2_rmdir,
2619         .unlink = smb2_unlink,
2620         .rename = smb2_rename_path,
2621         .create_hardlink = smb2_create_hardlink,
2622         .query_symlink = smb2_query_symlink,
2623         .query_mf_symlink = smb3_query_mf_symlink,
2624         .create_mf_symlink = smb3_create_mf_symlink,
2625         .open = smb2_open_file,
2626         .set_fid = smb2_set_fid,
2627         .close = smb2_close_file,
2628         .flush = smb2_flush_file,
2629         .async_readv = smb2_async_readv,
2630         .async_writev = smb2_async_writev,
2631         .sync_read = smb2_sync_read,
2632         .sync_write = smb2_sync_write,
2633         .query_dir_first = smb2_query_dir_first,
2634         .query_dir_next = smb2_query_dir_next,
2635         .close_dir = smb2_close_dir,
2636         .calc_smb_size = smb2_calc_size,
2637         .is_status_pending = smb2_is_status_pending,
2638         .oplock_response = smb2_oplock_response,
2639         .queryfs = smb2_queryfs,
2640         .mand_lock = smb2_mand_lock,
2641         .mand_unlock_range = smb2_unlock_range,
2642         .push_mand_locks = smb2_push_mandatory_locks,
2643         .get_lease_key = smb2_get_lease_key,
2644         .set_lease_key = smb2_set_lease_key,
2645         .new_lease_key = smb2_new_lease_key,
2646         .generate_signingkey = generate_smb311signingkey,
2647         .calc_signature = smb3_calc_signature,
2648         .set_integrity  = smb3_set_integrity,
2649         .is_read_op = smb21_is_read_op,
2650         .set_oplock_level = smb3_set_oplock_level,
2651         .create_lease_buf = smb3_create_lease_buf,
2652         .parse_lease_buf = smb3_parse_lease_buf,
2653         .copychunk_range = smb2_copychunk_range,
2654         .duplicate_extents = smb2_duplicate_extents,
2655 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
2656         .wp_retry_size = smb2_wp_retry_size,
2657         .dir_needs_close = smb2_dir_needs_close,
2658         .fallocate = smb3_fallocate,
2659         .enum_snapshots = smb3_enum_snapshots,
2660         .init_transform_rq = smb3_init_transform_rq,
2661         .free_transform_rq = smb3_free_transform_rq,
2662         .is_transform_hdr = smb3_is_transform_hdr,
2663         .receive_transform = smb3_receive_transform,
2664         .get_dfs_refer = smb2_get_dfs_refer,
2665         .select_sectype = smb2_select_sectype,
2666 };
2667 #endif /* CIFS_SMB311 */
2668
2669 struct smb_version_values smb20_values = {
2670         .version_string = SMB20_VERSION_STRING,
2671         .protocol_id = SMB20_PROT_ID,
2672         .req_capabilities = 0, /* MBZ */
2673         .large_lock_type = 0,
2674         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2675         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2676         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2677         .header_size = sizeof(struct smb2_hdr),
2678         .max_header_size = MAX_SMB2_HDR_SIZE,
2679         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2680         .lock_cmd = SMB2_LOCK,
2681         .cap_unix = 0,
2682         .cap_nt_find = SMB2_NT_FIND,
2683         .cap_large_files = SMB2_LARGE_FILES,
2684         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2685         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2686         .create_lease_size = sizeof(struct create_lease),
2687 };
2688
2689 struct smb_version_values smb21_values = {
2690         .version_string = SMB21_VERSION_STRING,
2691         .protocol_id = SMB21_PROT_ID,
2692         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
2693         .large_lock_type = 0,
2694         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2695         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2696         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2697         .header_size = sizeof(struct smb2_hdr),
2698         .max_header_size = MAX_SMB2_HDR_SIZE,
2699         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2700         .lock_cmd = SMB2_LOCK,
2701         .cap_unix = 0,
2702         .cap_nt_find = SMB2_NT_FIND,
2703         .cap_large_files = SMB2_LARGE_FILES,
2704         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2705         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2706         .create_lease_size = sizeof(struct create_lease),
2707 };
2708
2709 struct smb_version_values smb30_values = {
2710         .version_string = SMB30_VERSION_STRING,
2711         .protocol_id = SMB30_PROT_ID,
2712         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2713         .large_lock_type = 0,
2714         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2715         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2716         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2717         .header_size = sizeof(struct smb2_hdr),
2718         .max_header_size = MAX_SMB2_HDR_SIZE,
2719         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2720         .lock_cmd = SMB2_LOCK,
2721         .cap_unix = 0,
2722         .cap_nt_find = SMB2_NT_FIND,
2723         .cap_large_files = SMB2_LARGE_FILES,
2724         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2725         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2726         .create_lease_size = sizeof(struct create_lease_v2),
2727 };
2728
2729 struct smb_version_values smb302_values = {
2730         .version_string = SMB302_VERSION_STRING,
2731         .protocol_id = SMB302_PROT_ID,
2732         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2733         .large_lock_type = 0,
2734         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2735         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2736         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2737         .header_size = sizeof(struct smb2_hdr),
2738         .max_header_size = MAX_SMB2_HDR_SIZE,
2739         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2740         .lock_cmd = SMB2_LOCK,
2741         .cap_unix = 0,
2742         .cap_nt_find = SMB2_NT_FIND,
2743         .cap_large_files = SMB2_LARGE_FILES,
2744         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2745         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2746         .create_lease_size = sizeof(struct create_lease_v2),
2747 };
2748
2749 #ifdef CONFIG_CIFS_SMB311
2750 struct smb_version_values smb311_values = {
2751         .version_string = SMB311_VERSION_STRING,
2752         .protocol_id = SMB311_PROT_ID,
2753         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
2754         .large_lock_type = 0,
2755         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2756         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2757         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2758         .header_size = sizeof(struct smb2_hdr),
2759         .max_header_size = MAX_SMB2_HDR_SIZE,
2760         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2761         .lock_cmd = SMB2_LOCK,
2762         .cap_unix = 0,
2763         .cap_nt_find = SMB2_NT_FIND,
2764         .cap_large_files = SMB2_LARGE_FILES,
2765         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2766         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2767         .create_lease_size = sizeof(struct create_lease_v2),
2768 };
2769 #endif /* SMB311 */