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                         kfree(retbuf);
 946                         return rc;
 947                 }
 948
 949                 if (ret_data_len > snapshot_in.snapshot_array_size)
 950                         ret_data_len = snapshot_in.snapshot_array_size;
 951
 952                 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
 953                         rc = -EFAULT;
 954         }
 955
 956         kfree(retbuf);
 957         return rc;
 958 }
 959
 960 static int
 961 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 962                      const char *path, struct cifs_sb_info *cifs_sb,
 963                      struct cifs_fid *fid, __u16 search_flags,
 964                      struct cifs_search_info *srch_inf)
 965 {
 966         __le16 *utf16_path;
 967         int rc;
 968         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 969         struct cifs_open_parms oparms;
 970
 971         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 972         if (!utf16_path)
 973                 return -ENOMEM;
 974
 975         oparms.tcon = tcon;
 976         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 977         oparms.disposition = FILE_OPEN;
 978         oparms.create_options = 0;
 979         oparms.fid = fid;
 980         oparms.reconnect = false;
 981
 982         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 983         kfree(utf16_path);
 984         if (rc) {
 985                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
 986                 return rc;
 987         }
 988
 989         srch_inf->entries_in_buffer = 0;
 990         srch_inf->index_of_last_entry = 0;
 991
 992         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 993                                   fid->volatile_fid, 0, srch_inf);
 994         if (rc) {
 995                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
 996                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 997         }
 998         return rc;
 999 }
1000
1001 static int
1002 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1003                     struct cifs_fid *fid, __u16 search_flags,
1004                     struct cifs_search_info *srch_inf)
1005 {
1006         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1007                                     fid->volatile_fid, 0, srch_inf);
1008 }
1009
1010 static int
1011 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1012                struct cifs_fid *fid)
1013 {
1014         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1015 }
1016
1017 /*
1018 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1019 * the number of credits and return true. Otherwise - return false.
1020 */
1021 static bool
1022 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1023 {
1024         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1025
1026         if (shdr->Status != STATUS_PENDING)
1027                 return false;
1028
1029         if (!length) {
1030                 spin_lock(&server->req_lock);
1031                 server->credits += le16_to_cpu(shdr->CreditRequest);
1032                 spin_unlock(&server->req_lock);
1033                 wake_up(&server->request_q);
1034         }
1035
1036         return true;
1037 }
1038
1039 static int
1040 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1041                      struct cifsInodeInfo *cinode)
1042 {
1043         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1044                 return SMB2_lease_break(0, tcon, cinode->lease_key,
1045                                         smb2_get_lease_state(cinode));
1046
1047         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1048                                  fid->volatile_fid,
1049                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
1050 }
1051
1052 static int
1053 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1054              struct kstatfs *buf)
1055 {
1056         int rc;
1057         __le16 srch_path = 0; /* Null - open root of share */
1058         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1059         struct cifs_open_parms oparms;
1060         struct cifs_fid fid;
1061
1062         oparms.tcon = tcon;
1063         oparms.desired_access = FILE_READ_ATTRIBUTES;
1064         oparms.disposition = FILE_OPEN;
1065         oparms.create_options = 0;
1066         oparms.fid = &fid;
1067         oparms.reconnect = false;
1068
1069         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1070         if (rc)
1071                 return rc;
1072         buf->f_type = SMB2_MAGIC_NUMBER;
1073         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1074                            buf);
1075         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1076         return rc;
1077 }
1078
1079 static bool
1080 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1081 {
1082         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1083                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1084 }
1085
1086 static int
1087 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1088                __u64 length, __u32 type, int lock, int unlock, bool wait)
1089 {
1090         if (unlock && !lock)
1091                 type = SMB2_LOCKFLAG_UNLOCK;
1092         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1093                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1094                          current->tgid, length, offset, type, wait);
1095 }
1096
1097 static void
1098 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1099 {
1100         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1101 }
1102
1103 static void
1104 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1105 {
1106         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1107 }
1108
1109 static void
1110 smb2_new_lease_key(struct cifs_fid *fid)
1111 {
1112         generate_random_uuid(fid->lease_key);
1113 }
1114
1115 static int
1116 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1117                    const char *search_name,
1118                    struct dfs_info3_param **target_nodes,
1119                    unsigned int *num_of_nodes,
1120                    const struct nls_table *nls_codepage, int remap)
1121 {
1122         int rc;
1123         __le16 *utf16_path = NULL;
1124         int utf16_path_len = 0;
1125         struct cifs_tcon *tcon;
1126         struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1127         struct get_dfs_referral_rsp *dfs_rsp = NULL;
1128         u32 dfs_req_size = 0, dfs_rsp_size = 0;
1129
1130         cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1131
1132         /*
1133          * Use any tcon from the current session. Here, the first one.
1134          */
1135         spin_lock(&cifs_tcp_ses_lock);
1136         tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
1137                                         tcon_list);
1138         if (tcon)
1139                 tcon->tc_count++;
1140         spin_unlock(&cifs_tcp_ses_lock);
1141
1142         if (!tcon) {
1143                 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1144                          ses);
1145                 rc = -ENOTCONN;
1146                 goto out;
1147         }
1148
1149         utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1150                                            &utf16_path_len,
1151                                            nls_codepage, remap);
1152         if (!utf16_path) {
1153                 rc = -ENOMEM;
1154                 goto out;
1155         }
1156
1157         dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1158         dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1159         if (!dfs_req) {
1160                 rc = -ENOMEM;
1161                 goto out;
1162         }
1163
1164         /* Highest DFS referral version understood */
1165         dfs_req->MaxReferralLevel = DFS_VERSION;
1166
1167         /* Path to resolve in an UTF-16 null-terminated string */
1168         memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1169
1170         do {
1171                 /* try first with IPC */
1172                 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1173                                 FSCTL_DFS_GET_REFERRALS,
1174                                 true /* is_fsctl */, true /* use_ipc */,
1175                                 (char *)dfs_req, dfs_req_size,
1176                                 (char **)&dfs_rsp, &dfs_rsp_size);
1177                 if (rc == -ENOTCONN) {
1178                         /* try with normal tcon */
1179                         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1180                                         FSCTL_DFS_GET_REFERRALS,
1181                                         true /* is_fsctl */, false /*use_ipc*/,
1182                                         (char *)dfs_req, dfs_req_size,
1183                                         (char **)&dfs_rsp, &dfs_rsp_size);
1184                 }
1185         } while (rc == -EAGAIN);
1186
1187         if (rc) {
1188                 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1189                 goto out;
1190         }
1191
1192         rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1193                                  num_of_nodes, target_nodes,
1194                                  nls_codepage, remap, search_name,
1195                                  true /* is_unicode */);
1196         if (rc) {
1197                 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1198                 goto out;
1199         }
1200
1201  out:
1202         if (tcon) {
1203                 spin_lock(&cifs_tcp_ses_lock);
1204                 tcon->tc_count--;
1205                 spin_unlock(&cifs_tcp_ses_lock);
1206         }
1207         kfree(utf16_path);
1208         kfree(dfs_req);
1209         kfree(dfs_rsp);
1210         return rc;
1211 }
1212 #define SMB2_SYMLINK_STRUCT_SIZE \
1213         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1214
1215 static int
1216 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1217                    const char *full_path, char **target_path,
1218                    struct cifs_sb_info *cifs_sb)
1219 {
1220         int rc;
1221         __le16 *utf16_path;
1222         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1223         struct cifs_open_parms oparms;
1224         struct cifs_fid fid;
1225         struct smb2_err_rsp *err_buf = NULL;
1226         struct smb2_symlink_err_rsp *symlink;
1227         unsigned int sub_len;
1228         unsigned int sub_offset;
1229         unsigned int print_len;
1230         unsigned int print_offset;
1231
1232         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1233
1234         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1235         if (!utf16_path)
1236                 return -ENOMEM;
1237
1238         oparms.tcon = tcon;
1239         oparms.desired_access = FILE_READ_ATTRIBUTES;
1240         oparms.disposition = FILE_OPEN;
1241         oparms.create_options = 0;
1242         oparms.fid = &fid;
1243         oparms.reconnect = false;
1244
1245         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1246
1247         if (!rc || !err_buf) {
1248                 kfree(utf16_path);
1249                 return -ENOENT;
1250         }
1251
1252         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1253             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1254                 kfree(utf16_path);
1255                 return -ENOENT;
1256         }
1257
1258         /* open must fail on symlink - reset rc */
1259         rc = 0;
1260         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1261         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1262         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1263         print_len = le16_to_cpu(symlink->PrintNameLength);
1264         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1265
1266         if (get_rfc1002_length(err_buf) + 4 <
1267                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1268                 kfree(utf16_path);
1269                 return -ENOENT;
1270         }
1271
1272         if (get_rfc1002_length(err_buf) + 4 <
1273                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1274                 kfree(utf16_path);
1275                 return -ENOENT;
1276         }
1277
1278         *target_path = cifs_strndup_from_utf16(
1279                                 (char *)symlink->PathBuffer + sub_offset,
1280                                 sub_len, true, cifs_sb->local_nls);
1281         if (!(*target_path)) {
1282                 kfree(utf16_path);
1283                 return -ENOMEM;
1284         }
1285         convert_delimiter(*target_path, '/');
1286         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1287         kfree(utf16_path);
1288         return rc;
1289 }
1290
1291 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1292                             loff_t offset, loff_t len, bool keep_size)
1293 {
1294         struct inode *inode;
1295         struct cifsInodeInfo *cifsi;
1296         struct cifsFileInfo *cfile = file->private_data;
1297         struct file_zero_data_information fsctl_buf;
1298         long rc;
1299         unsigned int xid;
1300
1301         xid = get_xid();
1302
1303         inode = d_inode(cfile->dentry);
1304         cifsi = CIFS_I(inode);
1305
1306         /* if file not oplocked can't be sure whether asking to extend size */
1307         if (!CIFS_CACHE_READ(cifsi))
1308                 if (keep_size == false)
1309                         return -EOPNOTSUPP;
1310
1311         /*
1312          * Must check if file sparse since fallocate -z (zero range) assumes
1313          * non-sparse allocation
1314          */
1315         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1316                 return -EOPNOTSUPP;
1317
1318         /*
1319          * need to make sure we are not asked to extend the file since the SMB3
1320          * fsctl does not change the file size. In the future we could change
1321          * this to zero the first part of the range then set the file size
1322          * which for a non sparse file would zero the newly extended range
1323          */
1324         if (keep_size == false)
1325                 if (i_size_read(inode) < offset + len)
1326                         return -EOPNOTSUPP;
1327
1328         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1329
1330         fsctl_buf.FileOffset = cpu_to_le64(offset);
1331         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1332
1333         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1334                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1335                         true /* is_fctl */, false /* use_ipc */,
1336                         (char *)&fsctl_buf,
1337                         sizeof(struct file_zero_data_information), NULL, NULL);
1338         free_xid(xid);
1339         return rc;
1340 }
1341
1342 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1343                             loff_t offset, loff_t len)
1344 {
1345         struct inode *inode;
1346         struct cifsInodeInfo *cifsi;
1347         struct cifsFileInfo *cfile = file->private_data;
1348         struct file_zero_data_information fsctl_buf;
1349         long rc;
1350         unsigned int xid;
1351         __u8 set_sparse = 1;
1352
1353         xid = get_xid();
1354
1355         inode = d_inode(cfile->dentry);
1356         cifsi = CIFS_I(inode);
1357
1358         /* Need to make file sparse, if not already, before freeing range. */
1359         /* Consider adding equivalent for compressed since it could also work */
1360         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1361                 return -EOPNOTSUPP;
1362
1363         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1364
1365         fsctl_buf.FileOffset = cpu_to_le64(offset);
1366         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1367
1368         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1369                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1370                         true /* is_fctl */, false /* use_ipc */,
1371                         (char *)&fsctl_buf,
1372                         sizeof(struct file_zero_data_information), NULL, NULL);
1373         free_xid(xid);
1374         return rc;
1375 }
1376
1377 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1378                             loff_t off, loff_t len, bool keep_size)
1379 {
1380         struct inode *inode;
1381         struct cifsInodeInfo *cifsi;
1382         struct cifsFileInfo *cfile = file->private_data;
1383         long rc = -EOPNOTSUPP;
1384         unsigned int xid;
1385
1386         xid = get_xid();
1387
1388         inode = d_inode(cfile->dentry);
1389         cifsi = CIFS_I(inode);
1390
1391         /* if file not oplocked can't be sure whether asking to extend size */
1392         if (!CIFS_CACHE_READ(cifsi))
1393                 if (keep_size == false)
1394                         return -EOPNOTSUPP;
1395
1396         /*
1397          * Files are non-sparse by default so falloc may be a no-op
1398          * Must check if file sparse. If not sparse, and not extending
1399          * then no need to do anything since file already allocated
1400          */
1401         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1402                 if (keep_size == true)
1403                         return 0;
1404                 /* check if extending file */
1405                 else if (i_size_read(inode) >= off + len)
1406                         /* not extending file and already not sparse */
1407                         return 0;
1408                 /* BB: in future add else clause to extend file */
1409                 else
1410                         return -EOPNOTSUPP;
1411         }
1412
1413         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1414                 /*
1415                  * Check if falloc starts within first few pages of file
1416                  * and ends within a few pages of the end of file to
1417                  * ensure that most of file is being forced to be
1418                  * fallocated now. If so then setting whole file sparse
1419                  * ie potentially making a few extra pages at the beginning
1420                  * or end of the file non-sparse via set_sparse is harmless.
1421                  */
1422                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1423                         return -EOPNOTSUPP;
1424
1425                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1426         }
1427         /* BB: else ... in future add code to extend file and set sparse */
1428
1429
1430         free_xid(xid);
1431         return rc;
1432 }
1433
1434
1435 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1436                            loff_t off, loff_t len)
1437 {
1438         /* KEEP_SIZE already checked for by do_fallocate */
1439         if (mode & FALLOC_FL_PUNCH_HOLE)
1440                 return smb3_punch_hole(file, tcon, off, len);
1441         else if (mode & FALLOC_FL_ZERO_RANGE) {
1442                 if (mode & FALLOC_FL_KEEP_SIZE)
1443                         return smb3_zero_range(file, tcon, off, len, true);
1444                 return smb3_zero_range(file, tcon, off, len, false);
1445         } else if (mode == FALLOC_FL_KEEP_SIZE)
1446                 return smb3_simple_falloc(file, tcon, off, len, true);
1447         else if (mode == 0)
1448                 return smb3_simple_falloc(file, tcon, off, len, false);
1449
1450         return -EOPNOTSUPP;
1451 }
1452
1453 static void
1454 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1455                         struct cifsInodeInfo *cinode, bool set_level2)
1456 {
1457         if (set_level2)
1458                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1459                                                 0, NULL);
1460         else
1461                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1462 }
1463
1464 static void
1465 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1466                       unsigned int epoch, bool *purge_cache)
1467 {
1468         oplock &= 0xFF;
1469         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1470                 return;
1471         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1472                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1473                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1474                          &cinode->vfs_inode);
1475         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1476                 cinode->oplock = CIFS_CACHE_RW_FLG;
1477                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1478                          &cinode->vfs_inode);
1479         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1480                 cinode->oplock = CIFS_CACHE_READ_FLG;
1481                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1482                          &cinode->vfs_inode);
1483         } else
1484                 cinode->oplock = 0;
1485 }
1486
1487 static void
1488 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1489                        unsigned int epoch, bool *purge_cache)
1490 {
1491         char message[5] = {0};
1492
1493         oplock &= 0xFF;
1494         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1495                 return;
1496
1497         cinode->oplock = 0;
1498         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1499                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1500                 strcat(message, "R");
1501         }
1502         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1503                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1504                 strcat(message, "H");
1505         }
1506         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1507                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1508                 strcat(message, "W");
1509         }
1510         if (!cinode->oplock)
1511                 strcat(message, "None");
1512         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1513                  &cinode->vfs_inode);
1514 }
1515
1516 static void
1517 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1518                       unsigned int epoch, bool *purge_cache)
1519 {
1520         unsigned int old_oplock = cinode->oplock;
1521
1522         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1523
1524         if (purge_cache) {
1525                 *purge_cache = false;
1526                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1527                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1528                             (epoch - cinode->epoch > 0))
1529                                 *purge_cache = true;
1530                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1531                                  (epoch - cinode->epoch > 1))
1532                                 *purge_cache = true;
1533                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1534                                  (epoch - cinode->epoch > 1))
1535                                 *purge_cache = true;
1536                         else if (cinode->oplock == 0 &&
1537                                  (epoch - cinode->epoch > 0))
1538                                 *purge_cache = true;
1539                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1540                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1541                             (epoch - cinode->epoch > 0))
1542                                 *purge_cache = true;
1543                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1544                                  (epoch - cinode->epoch > 1))
1545                                 *purge_cache = true;
1546                 }
1547                 cinode->epoch = epoch;
1548         }
1549 }
1550
1551 static bool
1552 smb2_is_read_op(__u32 oplock)
1553 {
1554         return oplock == SMB2_OPLOCK_LEVEL_II;
1555 }
1556
1557 static bool
1558 smb21_is_read_op(__u32 oplock)
1559 {
1560         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1561                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1562 }
1563
1564 static __le32
1565 map_oplock_to_lease(u8 oplock)
1566 {
1567         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1568                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1569         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1570                 return SMB2_LEASE_READ_CACHING;
1571         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1572                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1573                        SMB2_LEASE_WRITE_CACHING;
1574         return 0;
1575 }
1576
1577 static char *
1578 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1579 {
1580         struct create_lease *buf;
1581
1582         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1583         if (!buf)
1584                 return NULL;
1585
1586         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1587         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1588         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1589
1590         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1591                                         (struct create_lease, lcontext));
1592         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1593         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1594                                 (struct create_lease, Name));
1595         buf->ccontext.NameLength = cpu_to_le16(4);
1596         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1597         buf->Name[0] = 'R';
1598         buf->Name[1] = 'q';
1599         buf->Name[2] = 'L';
1600         buf->Name[3] = 's';
1601         return (char *)buf;
1602 }
1603
1604 static char *
1605 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1606 {
1607         struct create_lease_v2 *buf;
1608
1609         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1610         if (!buf)
1611                 return NULL;
1612
1613         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1614         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1615         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1616
1617         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1618                                         (struct create_lease_v2, lcontext));
1619         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1620         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1621                                 (struct create_lease_v2, Name));
1622         buf->ccontext.NameLength = cpu_to_le16(4);
1623         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1624         buf->Name[0] = 'R';
1625         buf->Name[1] = 'q';
1626         buf->Name[2] = 'L';
1627         buf->Name[3] = 's';
1628         return (char *)buf;
1629 }
1630
1631 static __u8
1632 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1633 {
1634         struct create_lease *lc = (struct create_lease *)buf;
1635
1636         *epoch = 0; /* not used */
1637         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1638                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1639         return le32_to_cpu(lc->lcontext.LeaseState);
1640 }
1641
1642 static __u8
1643 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1644 {
1645         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1646
1647         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1648         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1649                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1650         return le32_to_cpu(lc->lcontext.LeaseState);
1651 }
1652
1653 static unsigned int
1654 smb2_wp_retry_size(struct inode *inode)
1655 {
1656         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1657                      SMB2_MAX_BUFFER_SIZE);
1658 }
1659
1660 static bool
1661 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1662 {
1663         return !cfile->invalidHandle;
1664 }
1665
1666 static void
1667 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
1668 {
1669         struct smb2_sync_hdr *shdr =
1670                         (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
1671         unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
1672
1673         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
1674         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
1675         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
1676         tr_hdr->Flags = cpu_to_le16(0x01);
1677         get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1678         memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
1679         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
1680         inc_rfc1001_len(tr_hdr, orig_len);
1681 }
1682
1683 static struct scatterlist *
1684 init_sg(struct smb_rqst *rqst, u8 *sign)
1685 {
1686         unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
1687         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1688         struct scatterlist *sg;
1689         unsigned int i;
1690         unsigned int j;
1691
1692         sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
1693         if (!sg)
1694                 return NULL;
1695
1696         sg_init_table(sg, sg_len);
1697         sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
1698         for (i = 1; i < rqst->rq_nvec; i++)
1699                 sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
1700                                                 rqst->rq_iov[i].iov_len);
1701         for (j = 0; i < sg_len - 1; i++, j++) {
1702                 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
1703                                                         : rqst->rq_tailsz;
1704                 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
1705         }
1706         sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
1707         return sg;
1708 }
1709
1710 struct cifs_crypt_result {
1711         int err;
1712         struct completion completion;
1713 };
1714
1715 static void cifs_crypt_complete(struct crypto_async_request *req, int err)
1716 {
1717         struct cifs_crypt_result *res = req->data;
1718
1719         if (err == -EINPROGRESS)
1720                 return;
1721
1722         res->err = err;
1723         complete(&res->completion);
1724 }
1725
1726 static int
1727 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
1728 {
1729         struct cifs_ses *ses;
1730         u8 *ses_enc_key;
1731
1732         spin_lock(&cifs_tcp_ses_lock);
1733         list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1734                 if (ses->Suid != ses_id)
1735                         continue;
1736                 ses_enc_key = enc ? ses->smb3encryptionkey :
1737                                                         ses->smb3decryptionkey;
1738                 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
1739                 spin_unlock(&cifs_tcp_ses_lock);
1740                 return 0;
1741         }
1742         spin_unlock(&cifs_tcp_ses_lock);
1743
1744         return 1;
1745 }
1746 /*
1747  * Encrypt or decrypt @rqst message. @rqst has the following format:
1748  * iov[0] - transform header (associate data),
1749  * iov[1-N] and pages - data to encrypt.
1750  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
1751  * untouched.
1752  */
1753 static int
1754 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
1755 {
1756         struct smb2_transform_hdr *tr_hdr =
1757                         (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
1758         unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
1759         int rc = 0;
1760         struct scatterlist *sg;
1761         u8 sign[SMB2_SIGNATURE_SIZE] = {};
1762         u8 key[SMB3_SIGN_KEY_SIZE];
1763         struct aead_request *req;
1764         char *iv;
1765         unsigned int iv_len;
1766         struct cifs_crypt_result result = {0, };
1767         struct crypto_aead *tfm;
1768         unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
1769
1770         init_completion(&result.completion);
1771
1772         rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
1773         if (rc) {
1774                 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
1775                          enc ? "en" : "de");
1776                 return 0;
1777         }
1778
1779         rc = smb3_crypto_aead_allocate(server);
1780         if (rc) {
1781                 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
1782                 return rc;
1783         }
1784
1785         tfm = enc ? server->secmech.ccmaesencrypt :
1786                                                 server->secmech.ccmaesdecrypt;
1787         rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
1788         if (rc) {
1789                 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
1790                 return rc;
1791         }
1792
1793         rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
1794         if (rc) {
1795                 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
1796                 return rc;
1797         }
1798
1799         req = aead_request_alloc(tfm, GFP_KERNEL);
1800         if (!req) {
1801                 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
1802                 return -ENOMEM;
1803         }
1804
1805         if (!enc) {
1806                 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
1807                 crypt_len += SMB2_SIGNATURE_SIZE;
1808         }
1809
1810         sg = init_sg(rqst, sign);
1811         if (!sg) {
1812                 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
1813                 rc = -ENOMEM;
1814                 goto free_req;
1815         }
1816
1817         iv_len = crypto_aead_ivsize(tfm);
1818         iv = kzalloc(iv_len, GFP_KERNEL);
1819         if (!iv) {
1820                 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
1821                 rc = -ENOMEM;
1822                 goto free_sg;
1823         }
1824         iv[0] = 3;
1825         memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
1826
1827         aead_request_set_crypt(req, sg, sg, crypt_len, iv);
1828         aead_request_set_ad(req, assoc_data_len);
1829
1830         aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
1831                                   cifs_crypt_complete, &result);
1832
1833         rc = enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req);
1834
1835         if (rc == -EINPROGRESS || rc == -EBUSY) {
1836                 wait_for_completion(&result.completion);
1837                 rc = result.err;
1838         }
1839
1840         if (!rc && enc)
1841                 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
1842
1843         kfree(iv);
1844 free_sg:
1845         kfree(sg);
1846 free_req:
1847         kfree(req);
1848         return rc;
1849 }
1850
1851 static int
1852 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
1853                        struct smb_rqst *old_rq)
1854 {
1855         struct kvec *iov;
1856         struct page **pages;
1857         struct smb2_transform_hdr *tr_hdr;
1858         unsigned int npages = old_rq->rq_npages;
1859         int i;
1860         int rc = -ENOMEM;
1861
1862         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
1863         if (!pages)
1864                 return rc;
1865
1866         new_rq->rq_pages = pages;
1867         new_rq->rq_npages = old_rq->rq_npages;
1868         new_rq->rq_pagesz = old_rq->rq_pagesz;
1869         new_rq->rq_tailsz = old_rq->rq_tailsz;
1870
1871         for (i = 0; i < npages; i++) {
1872                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
1873                 if (!pages[i])
1874                         goto err_free_pages;
1875         }
1876
1877         iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
1878         if (!iov)
1879                 goto err_free_pages;
1880
1881         /* copy all iovs from the old except the 1st one (rfc1002 length) */
1882         memcpy(&iov[1], &old_rq->rq_iov[1],
1883                                 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
1884         new_rq->rq_iov = iov;
1885         new_rq->rq_nvec = old_rq->rq_nvec;
1886
1887         tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
1888         if (!tr_hdr)
1889                 goto err_free_iov;
1890
1891         /* fill the 1st iov with a transform header */
1892         fill_transform_hdr(tr_hdr, old_rq);
1893         new_rq->rq_iov[0].iov_base = tr_hdr;
1894         new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1895
1896         /* copy pages form the old */
1897         for (i = 0; i < npages; i++) {
1898                 char *dst = kmap(new_rq->rq_pages[i]);
1899                 char *src = kmap(old_rq->rq_pages[i]);
1900                 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
1901                                                         new_rq->rq_tailsz;
1902                 memcpy(dst, src, len);
1903                 kunmap(new_rq->rq_pages[i]);
1904                 kunmap(old_rq->rq_pages[i]);
1905         }
1906
1907         rc = crypt_message(server, new_rq, 1);
1908         cifs_dbg(FYI, "encrypt message returned %d", rc);
1909         if (rc)
1910                 goto err_free_tr_hdr;
1911
1912         return rc;
1913
1914 err_free_tr_hdr:
1915         kfree(tr_hdr);
1916 err_free_iov:
1917         kfree(iov);
1918 err_free_pages:
1919         for (i = i - 1; i >= 0; i--)
1920                 put_page(pages[i]);
1921         kfree(pages);
1922         return rc;
1923 }
1924
1925 static void
1926 smb3_free_transform_rq(struct smb_rqst *rqst)
1927 {
1928         int i = rqst->rq_npages - 1;
1929
1930         for (; i >= 0; i--)
1931                 put_page(rqst->rq_pages[i]);
1932         kfree(rqst->rq_pages);
1933         /* free transform header */
1934         kfree(rqst->rq_iov[0].iov_base);
1935         kfree(rqst->rq_iov);
1936 }
1937
1938 static int
1939 smb3_is_transform_hdr(void *buf)
1940 {
1941         struct smb2_transform_hdr *trhdr = buf;
1942
1943         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
1944 }
1945
1946 static int
1947 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
1948                  unsigned int buf_data_size, struct page **pages,
1949                  unsigned int npages, unsigned int page_data_size)
1950 {
1951         struct kvec iov[2];
1952         struct smb_rqst rqst = {NULL};
1953         struct smb2_hdr *hdr;
1954         int rc;
1955
1956         iov[0].iov_base = buf;
1957         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
1958         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
1959         iov[1].iov_len = buf_data_size;
1960
1961         rqst.rq_iov = iov;
1962         rqst.rq_nvec = 2;
1963         rqst.rq_pages = pages;
1964         rqst.rq_npages = npages;
1965         rqst.rq_pagesz = PAGE_SIZE;
1966         rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
1967
1968         rc = crypt_message(server, &rqst, 0);
1969         cifs_dbg(FYI, "decrypt message returned %d\n", rc);
1970
1971         if (rc)
1972                 return rc;
1973
1974         memmove(buf + 4, iov[1].iov_base, buf_data_size);
1975         hdr = (struct smb2_hdr *)buf;
1976         hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
1977         server->total_read = buf_data_size + page_data_size + 4;
1978
1979         return rc;
1980 }
1981
1982 static int
1983 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
1984                      unsigned int npages, unsigned int len)
1985 {
1986         int i;
1987         int length;
1988
1989         for (i = 0; i < npages; i++) {
1990                 struct page *page = pages[i];
1991                 size_t n;
1992
1993                 n = len;
1994                 if (len >= PAGE_SIZE) {
1995                         /* enough data to fill the page */
1996                         n = PAGE_SIZE;
1997                         len -= n;
1998                 } else {
1999                         zero_user(page, len, PAGE_SIZE - len);
2000                         len = 0;
2001                 }
2002                 length = cifs_read_page_from_socket(server, page, n);
2003                 if (length < 0)
2004                         return length;
2005                 server->total_read += length;
2006         }
2007
2008         return 0;
2009 }
2010
2011 static int
2012 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2013                unsigned int cur_off, struct bio_vec **page_vec)
2014 {
2015         struct bio_vec *bvec;
2016         int i;
2017
2018         bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2019         if (!bvec)
2020                 return -ENOMEM;
2021
2022         for (i = 0; i < npages; i++) {
2023                 bvec[i].bv_page = pages[i];
2024                 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2025                 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2026                 data_size -= bvec[i].bv_len;
2027         }
2028
2029         if (data_size != 0) {
2030                 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2031                 kfree(bvec);
2032                 return -EIO;
2033         }
2034
2035         *page_vec = bvec;
2036         return 0;
2037 }
2038
2039 static int
2040 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2041                  char *buf, unsigned int buf_len, struct page **pages,
2042                  unsigned int npages, unsigned int page_data_size)
2043 {
2044         unsigned int data_offset;
2045         unsigned int data_len;
2046         unsigned int cur_off;
2047         unsigned int cur_page_idx;
2048         unsigned int pad_len;
2049         struct cifs_readdata *rdata = mid->callback_data;
2050         struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2051         struct bio_vec *bvec = NULL;
2052         struct iov_iter iter;
2053         struct kvec iov;
2054         int length;
2055
2056         if (shdr->Command != SMB2_READ) {
2057                 cifs_dbg(VFS, "only big read responses are supported\n");
2058                 return -ENOTSUPP;
2059         }
2060
2061         if (server->ops->is_status_pending &&
2062                         server->ops->is_status_pending(buf, server, 0))
2063                 return -1;
2064
2065         rdata->result = server->ops->map_error(buf, false);
2066         if (rdata->result != 0) {
2067                 cifs_dbg(FYI, "%s: server returned error %d\n",
2068                          __func__, rdata->result);
2069                 dequeue_mid(mid, rdata->result);
2070                 return 0;
2071         }
2072
2073         data_offset = server->ops->read_data_offset(buf) + 4;
2074         data_len = server->ops->read_data_length(buf);
2075
2076         if (data_offset < server->vals->read_rsp_size) {
2077                 /*
2078                  * win2k8 sometimes sends an offset of 0 when the read
2079                  * is beyond the EOF. Treat it as if the data starts just after
2080                  * the header.
2081                  */
2082                 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2083                          __func__, data_offset);
2084                 data_offset = server->vals->read_rsp_size;
2085         } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2086                 /* data_offset is beyond the end of smallbuf */
2087                 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2088                          __func__, data_offset);
2089                 rdata->result = -EIO;
2090                 dequeue_mid(mid, rdata->result);
2091                 return 0;
2092         }
2093
2094         pad_len = data_offset - server->vals->read_rsp_size;
2095
2096         if (buf_len <= data_offset) {
2097                 /* read response payload is in pages */
2098                 cur_page_idx = pad_len / PAGE_SIZE;
2099                 cur_off = pad_len % PAGE_SIZE;
2100
2101                 if (cur_page_idx != 0) {
2102                         /* data offset is beyond the 1st page of response */
2103                         cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2104                                  __func__, data_offset);
2105                         rdata->result = -EIO;
2106                         dequeue_mid(mid, rdata->result);
2107                         return 0;
2108                 }
2109
2110                 if (data_len > page_data_size - pad_len) {
2111                         /* data_len is corrupt -- discard frame */
2112                         rdata->result = -EIO;
2113                         dequeue_mid(mid, rdata->result);
2114                         return 0;
2115                 }
2116
2117                 rdata->result = init_read_bvec(pages, npages, page_data_size,
2118                                                cur_off, &bvec);
2119                 if (rdata->result != 0) {
2120                         dequeue_mid(mid, rdata->result);
2121                         return 0;
2122                 }
2123
2124                 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2125         } else if (buf_len >= data_offset + data_len) {
2126                 /* read response payload is in buf */
2127                 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2128                 iov.iov_base = buf + data_offset;
2129                 iov.iov_len = data_len;
2130                 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2131         } else {
2132                 /* read response payload cannot be in both buf and pages */
2133                 WARN_ONCE(1, "buf can not contain only a part of read data");
2134                 rdata->result = -EIO;
2135                 dequeue_mid(mid, rdata->result);
2136                 return 0;
2137         }
2138
2139         /* set up first iov for signature check */
2140         rdata->iov[0].iov_base = buf;
2141         rdata->iov[0].iov_len = 4;
2142         rdata->iov[1].iov_base = buf + 4;
2143         rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2144         cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2145                  rdata->iov[0].iov_base, server->vals->read_rsp_size);
2146
2147         length = rdata->copy_into_pages(server, rdata, &iter);
2148
2149         kfree(bvec);
2150
2151         if (length < 0)
2152                 return length;
2153
2154         dequeue_mid(mid, false);
2155         return length;
2156 }
2157
2158 static int
2159 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2160 {
2161         char *buf = server->smallbuf;
2162         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2163         unsigned int npages;
2164         struct page **pages;
2165         unsigned int len;
2166         unsigned int buflen = get_rfc1002_length(buf) + 4;
2167         int rc;
2168         int i = 0;
2169
2170         len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2171                 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2172
2173         rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2174         if (rc < 0)
2175                 return rc;
2176         server->total_read += rc;
2177
2178         len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2179                                                 server->vals->read_rsp_size;
2180         npages = DIV_ROUND_UP(len, PAGE_SIZE);
2181
2182         pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2183         if (!pages) {
2184                 rc = -ENOMEM;
2185                 goto discard_data;
2186         }
2187
2188         for (; i < npages; i++) {
2189                 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2190                 if (!pages[i]) {
2191                         rc = -ENOMEM;
2192                         goto discard_data;
2193                 }
2194         }
2195
2196         /* read read data into pages */
2197         rc = read_data_into_pages(server, pages, npages, len);
2198         if (rc)
2199                 goto free_pages;
2200
2201         rc = cifs_discard_remaining_data(server);
2202         if (rc)
2203                 goto free_pages;
2204
2205         rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2206                               pages, npages, len);
2207         if (rc)
2208                 goto free_pages;
2209
2210         *mid = smb2_find_mid(server, buf);
2211         if (*mid == NULL)
2212                 cifs_dbg(FYI, "mid not found\n");
2213         else {
2214                 cifs_dbg(FYI, "mid found\n");
2215                 (*mid)->decrypted = true;
2216                 rc = handle_read_data(server, *mid, buf,
2217                                       server->vals->read_rsp_size,
2218                                       pages, npages, len);
2219         }
2220
2221 free_pages:
2222         for (i = i - 1; i >= 0; i--)
2223                 put_page(pages[i]);
2224         kfree(pages);
2225         return rc;
2226 discard_data:
2227         cifs_discard_remaining_data(server);
2228         goto free_pages;
2229 }
2230
2231 static int
2232 receive_encrypted_standard(struct TCP_Server_Info *server,
2233                            struct mid_q_entry **mid)
2234 {
2235         int length;
2236         char *buf = server->smallbuf;
2237         unsigned int pdu_length = get_rfc1002_length(buf);
2238         unsigned int buf_size;
2239         struct mid_q_entry *mid_entry;
2240
2241         /* switch to large buffer if too big for a small one */
2242         if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2243                 server->large_buf = true;
2244                 memcpy(server->bigbuf, buf, server->total_read);
2245                 buf = server->bigbuf;
2246         }
2247
2248         /* now read the rest */
2249         length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2250                                 pdu_length - HEADER_SIZE(server) + 1 + 4);
2251         if (length < 0)
2252                 return length;
2253         server->total_read += length;
2254
2255         buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2256         length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2257         if (length)
2258                 return length;
2259
2260         mid_entry = smb2_find_mid(server, buf);
2261         if (mid_entry == NULL)
2262                 cifs_dbg(FYI, "mid not found\n");
2263         else {
2264                 cifs_dbg(FYI, "mid found\n");
2265                 mid_entry->decrypted = true;
2266         }
2267
2268         *mid = mid_entry;
2269
2270         if (mid_entry && mid_entry->handle)
2271                 return mid_entry->handle(server, mid_entry);
2272
2273         return cifs_handle_standard(server, mid_entry);
2274 }
2275
2276 static int
2277 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2278 {
2279         char *buf = server->smallbuf;
2280         unsigned int pdu_length = get_rfc1002_length(buf);
2281         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2282         unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2283
2284         if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2285                                                 sizeof(struct smb2_sync_hdr)) {
2286                 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2287                          pdu_length);
2288                 cifs_reconnect(server);
2289                 wake_up(&server->response_q);
2290                 return -ECONNABORTED;
2291         }
2292
2293         if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2294                 cifs_dbg(VFS, "Transform message is broken\n");
2295                 cifs_reconnect(server);
2296                 wake_up(&server->response_q);
2297                 return -ECONNABORTED;
2298         }
2299
2300         if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2301                 return receive_encrypted_read(server, mid);
2302
2303         return receive_encrypted_standard(server, mid);
2304 }
2305
2306 int
2307 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2308 {
2309         char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2310
2311         return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2312                                 NULL, 0, 0);
2313 }
2314
2315 struct smb_version_operations smb20_operations = {
2316         .compare_fids = smb2_compare_fids,
2317         .setup_request = smb2_setup_request,
2318         .setup_async_request = smb2_setup_async_request,
2319         .check_receive = smb2_check_receive,
2320         .add_credits = smb2_add_credits,
2321         .set_credits = smb2_set_credits,
2322         .get_credits_field = smb2_get_credits_field,
2323         .get_credits = smb2_get_credits,
2324         .wait_mtu_credits = cifs_wait_mtu_credits,
2325         .get_next_mid = smb2_get_next_mid,
2326         .read_data_offset = smb2_read_data_offset,
2327         .read_data_length = smb2_read_data_length,
2328         .map_error = map_smb2_to_linux_error,
2329         .find_mid = smb2_find_mid,
2330         .check_message = smb2_check_message,
2331         .dump_detail = smb2_dump_detail,
2332         .clear_stats = smb2_clear_stats,
2333         .print_stats = smb2_print_stats,
2334         .is_oplock_break = smb2_is_valid_oplock_break,
2335         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2336         .downgrade_oplock = smb2_downgrade_oplock,
2337         .need_neg = smb2_need_neg,
2338         .negotiate = smb2_negotiate,
2339         .negotiate_wsize = smb2_negotiate_wsize,
2340         .negotiate_rsize = smb2_negotiate_rsize,
2341         .sess_setup = SMB2_sess_setup,
2342         .logoff = SMB2_logoff,
2343         .tree_connect = SMB2_tcon,
2344         .tree_disconnect = SMB2_tdis,
2345         .qfs_tcon = smb2_qfs_tcon,
2346         .is_path_accessible = smb2_is_path_accessible,
2347         .can_echo = smb2_can_echo,
2348         .echo = SMB2_echo,
2349         .query_path_info = smb2_query_path_info,
2350         .get_srv_inum = smb2_get_srv_inum,
2351         .query_file_info = smb2_query_file_info,
2352         .set_path_size = smb2_set_path_size,
2353         .set_file_size = smb2_set_file_size,
2354         .set_file_info = smb2_set_file_info,
2355         .set_compression = smb2_set_compression,
2356         .mkdir = smb2_mkdir,
2357         .mkdir_setinfo = smb2_mkdir_setinfo,
2358         .rmdir = smb2_rmdir,
2359         .unlink = smb2_unlink,
2360         .rename = smb2_rename_path,
2361         .create_hardlink = smb2_create_hardlink,
2362         .query_symlink = smb2_query_symlink,
2363         .query_mf_symlink = smb3_query_mf_symlink,
2364         .create_mf_symlink = smb3_create_mf_symlink,
2365         .open = smb2_open_file,
2366         .set_fid = smb2_set_fid,
2367         .close = smb2_close_file,
2368         .flush = smb2_flush_file,
2369         .async_readv = smb2_async_readv,
2370         .async_writev = smb2_async_writev,
2371         .sync_read = smb2_sync_read,
2372         .sync_write = smb2_sync_write,
2373         .query_dir_first = smb2_query_dir_first,
2374         .query_dir_next = smb2_query_dir_next,
2375         .close_dir = smb2_close_dir,
2376         .calc_smb_size = smb2_calc_size,
2377         .is_status_pending = smb2_is_status_pending,
2378         .oplock_response = smb2_oplock_response,
2379         .queryfs = smb2_queryfs,
2380         .mand_lock = smb2_mand_lock,
2381         .mand_unlock_range = smb2_unlock_range,
2382         .push_mand_locks = smb2_push_mandatory_locks,
2383         .get_lease_key = smb2_get_lease_key,
2384         .set_lease_key = smb2_set_lease_key,
2385         .new_lease_key = smb2_new_lease_key,
2386         .calc_signature = smb2_calc_signature,
2387         .is_read_op = smb2_is_read_op,
2388         .set_oplock_level = smb2_set_oplock_level,
2389         .create_lease_buf = smb2_create_lease_buf,
2390         .parse_lease_buf = smb2_parse_lease_buf,
2391         .copychunk_range = smb2_copychunk_range,
2392         .wp_retry_size = smb2_wp_retry_size,
2393         .dir_needs_close = smb2_dir_needs_close,
2394         .get_dfs_refer = smb2_get_dfs_refer,
2395         .select_sectype = smb2_select_sectype,
2396 };
2397
2398 struct smb_version_operations smb21_operations = {
2399         .compare_fids = smb2_compare_fids,
2400         .setup_request = smb2_setup_request,
2401         .setup_async_request = smb2_setup_async_request,
2402         .check_receive = smb2_check_receive,
2403         .add_credits = smb2_add_credits,
2404         .set_credits = smb2_set_credits,
2405         .get_credits_field = smb2_get_credits_field,
2406         .get_credits = smb2_get_credits,
2407         .wait_mtu_credits = smb2_wait_mtu_credits,
2408         .get_next_mid = smb2_get_next_mid,
2409         .read_data_offset = smb2_read_data_offset,
2410         .read_data_length = smb2_read_data_length,
2411         .map_error = map_smb2_to_linux_error,
2412         .find_mid = smb2_find_mid,
2413         .check_message = smb2_check_message,
2414         .dump_detail = smb2_dump_detail,
2415         .clear_stats = smb2_clear_stats,
2416         .print_stats = smb2_print_stats,
2417         .is_oplock_break = smb2_is_valid_oplock_break,
2418         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2419         .downgrade_oplock = smb2_downgrade_oplock,
2420         .need_neg = smb2_need_neg,
2421         .negotiate = smb2_negotiate,
2422         .negotiate_wsize = smb2_negotiate_wsize,
2423         .negotiate_rsize = smb2_negotiate_rsize,
2424         .sess_setup = SMB2_sess_setup,
2425         .logoff = SMB2_logoff,
2426         .tree_connect = SMB2_tcon,
2427         .tree_disconnect = SMB2_tdis,
2428         .qfs_tcon = smb2_qfs_tcon,
2429         .is_path_accessible = smb2_is_path_accessible,
2430         .can_echo = smb2_can_echo,
2431         .echo = SMB2_echo,
2432         .query_path_info = smb2_query_path_info,
2433         .get_srv_inum = smb2_get_srv_inum,
2434         .query_file_info = smb2_query_file_info,
2435         .set_path_size = smb2_set_path_size,
2436         .set_file_size = smb2_set_file_size,
2437         .set_file_info = smb2_set_file_info,
2438         .set_compression = smb2_set_compression,
2439         .mkdir = smb2_mkdir,
2440         .mkdir_setinfo = smb2_mkdir_setinfo,
2441         .rmdir = smb2_rmdir,
2442         .unlink = smb2_unlink,
2443         .rename = smb2_rename_path,
2444         .create_hardlink = smb2_create_hardlink,
2445         .query_symlink = smb2_query_symlink,
2446         .query_mf_symlink = smb3_query_mf_symlink,
2447         .create_mf_symlink = smb3_create_mf_symlink,
2448         .open = smb2_open_file,
2449         .set_fid = smb2_set_fid,
2450         .close = smb2_close_file,
2451         .flush = smb2_flush_file,
2452         .async_readv = smb2_async_readv,
2453         .async_writev = smb2_async_writev,
2454         .sync_read = smb2_sync_read,
2455         .sync_write = smb2_sync_write,
2456         .query_dir_first = smb2_query_dir_first,
2457         .query_dir_next = smb2_query_dir_next,
2458         .close_dir = smb2_close_dir,
2459         .calc_smb_size = smb2_calc_size,
2460         .is_status_pending = smb2_is_status_pending,
2461         .oplock_response = smb2_oplock_response,
2462         .queryfs = smb2_queryfs,
2463         .mand_lock = smb2_mand_lock,
2464         .mand_unlock_range = smb2_unlock_range,
2465         .push_mand_locks = smb2_push_mandatory_locks,
2466         .get_lease_key = smb2_get_lease_key,
2467         .set_lease_key = smb2_set_lease_key,
2468         .new_lease_key = smb2_new_lease_key,
2469         .calc_signature = smb2_calc_signature,
2470         .is_read_op = smb21_is_read_op,
2471         .set_oplock_level = smb21_set_oplock_level,
2472         .create_lease_buf = smb2_create_lease_buf,
2473         .parse_lease_buf = smb2_parse_lease_buf,
2474         .copychunk_range = smb2_copychunk_range,
2475         .wp_retry_size = smb2_wp_retry_size,
2476         .dir_needs_close = smb2_dir_needs_close,
2477         .enum_snapshots = smb3_enum_snapshots,
2478         .get_dfs_refer = smb2_get_dfs_refer,
2479         .select_sectype = smb2_select_sectype,
2480 };
2481
2482 struct smb_version_operations smb30_operations = {
2483         .compare_fids = smb2_compare_fids,
2484         .setup_request = smb2_setup_request,
2485         .setup_async_request = smb2_setup_async_request,
2486         .check_receive = smb2_check_receive,
2487         .add_credits = smb2_add_credits,
2488         .set_credits = smb2_set_credits,
2489         .get_credits_field = smb2_get_credits_field,
2490         .get_credits = smb2_get_credits,
2491         .wait_mtu_credits = smb2_wait_mtu_credits,
2492         .get_next_mid = smb2_get_next_mid,
2493         .read_data_offset = smb2_read_data_offset,
2494         .read_data_length = smb2_read_data_length,
2495         .map_error = map_smb2_to_linux_error,
2496         .find_mid = smb2_find_mid,
2497         .check_message = smb2_check_message,
2498         .dump_detail = smb2_dump_detail,
2499         .clear_stats = smb2_clear_stats,
2500         .print_stats = smb2_print_stats,
2501         .dump_share_caps = smb2_dump_share_caps,
2502         .is_oplock_break = smb2_is_valid_oplock_break,
2503         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2504         .downgrade_oplock = smb2_downgrade_oplock,
2505         .need_neg = smb2_need_neg,
2506         .negotiate = smb2_negotiate,
2507         .negotiate_wsize = smb2_negotiate_wsize,
2508         .negotiate_rsize = smb2_negotiate_rsize,
2509         .sess_setup = SMB2_sess_setup,
2510         .logoff = SMB2_logoff,
2511         .tree_connect = SMB2_tcon,
2512         .tree_disconnect = SMB2_tdis,
2513         .qfs_tcon = smb3_qfs_tcon,
2514         .is_path_accessible = smb2_is_path_accessible,
2515         .can_echo = smb2_can_echo,
2516         .echo = SMB2_echo,
2517         .query_path_info = smb2_query_path_info,
2518         .get_srv_inum = smb2_get_srv_inum,
2519         .query_file_info = smb2_query_file_info,
2520         .set_path_size = smb2_set_path_size,
2521         .set_file_size = smb2_set_file_size,
2522         .set_file_info = smb2_set_file_info,
2523         .set_compression = smb2_set_compression,
2524         .mkdir = smb2_mkdir,
2525         .mkdir_setinfo = smb2_mkdir_setinfo,
2526         .rmdir = smb2_rmdir,
2527         .unlink = smb2_unlink,
2528         .rename = smb2_rename_path,
2529         .create_hardlink = smb2_create_hardlink,
2530         .query_symlink = smb2_query_symlink,
2531         .query_mf_symlink = smb3_query_mf_symlink,
2532         .create_mf_symlink = smb3_create_mf_symlink,
2533         .open = smb2_open_file,
2534         .set_fid = smb2_set_fid,
2535         .close = smb2_close_file,
2536         .flush = smb2_flush_file,
2537         .async_readv = smb2_async_readv,
2538         .async_writev = smb2_async_writev,
2539         .sync_read = smb2_sync_read,
2540         .sync_write = smb2_sync_write,
2541         .query_dir_first = smb2_query_dir_first,
2542         .query_dir_next = smb2_query_dir_next,
2543         .close_dir = smb2_close_dir,
2544         .calc_smb_size = smb2_calc_size,
2545         .is_status_pending = smb2_is_status_pending,
2546         .oplock_response = smb2_oplock_response,
2547         .queryfs = smb2_queryfs,
2548         .mand_lock = smb2_mand_lock,
2549         .mand_unlock_range = smb2_unlock_range,
2550         .push_mand_locks = smb2_push_mandatory_locks,
2551         .get_lease_key = smb2_get_lease_key,
2552         .set_lease_key = smb2_set_lease_key,
2553         .new_lease_key = smb2_new_lease_key,
2554         .generate_signingkey = generate_smb30signingkey,
2555         .calc_signature = smb3_calc_signature,
2556         .set_integrity  = smb3_set_integrity,
2557         .is_read_op = smb21_is_read_op,
2558         .set_oplock_level = smb3_set_oplock_level,
2559         .create_lease_buf = smb3_create_lease_buf,
2560         .parse_lease_buf = smb3_parse_lease_buf,
2561         .copychunk_range = smb2_copychunk_range,
2562         .duplicate_extents = smb2_duplicate_extents,
2563         .validate_negotiate = smb3_validate_negotiate,
2564         .wp_retry_size = smb2_wp_retry_size,
2565         .dir_needs_close = smb2_dir_needs_close,
2566         .fallocate = smb3_fallocate,
2567         .enum_snapshots = smb3_enum_snapshots,
2568         .init_transform_rq = smb3_init_transform_rq,
2569         .free_transform_rq = smb3_free_transform_rq,
2570         .is_transform_hdr = smb3_is_transform_hdr,
2571         .receive_transform = smb3_receive_transform,
2572         .get_dfs_refer = smb2_get_dfs_refer,
2573         .select_sectype = smb2_select_sectype,
2574 };
2575
2576 #ifdef CONFIG_CIFS_SMB311
2577 struct smb_version_operations smb311_operations = {
2578         .compare_fids = smb2_compare_fids,
2579         .setup_request = smb2_setup_request,
2580         .setup_async_request = smb2_setup_async_request,
2581         .check_receive = smb2_check_receive,
2582         .add_credits = smb2_add_credits,
2583         .set_credits = smb2_set_credits,
2584         .get_credits_field = smb2_get_credits_field,
2585         .get_credits = smb2_get_credits,
2586         .wait_mtu_credits = smb2_wait_mtu_credits,
2587         .get_next_mid = smb2_get_next_mid,
2588         .read_data_offset = smb2_read_data_offset,
2589         .read_data_length = smb2_read_data_length,
2590         .map_error = map_smb2_to_linux_error,
2591         .find_mid = smb2_find_mid,
2592         .check_message = smb2_check_message,
2593         .dump_detail = smb2_dump_detail,
2594         .clear_stats = smb2_clear_stats,
2595         .print_stats = smb2_print_stats,
2596         .dump_share_caps = smb2_dump_share_caps,
2597         .is_oplock_break = smb2_is_valid_oplock_break,
2598         .handle_cancelled_mid = smb2_handle_cancelled_mid,
2599         .downgrade_oplock = smb2_downgrade_oplock,
2600         .need_neg = smb2_need_neg,
2601         .negotiate = smb2_negotiate,
2602         .negotiate_wsize = smb2_negotiate_wsize,
2603         .negotiate_rsize = smb2_negotiate_rsize,
2604         .sess_setup = SMB2_sess_setup,
2605         .logoff = SMB2_logoff,
2606         .tree_connect = SMB2_tcon,
2607         .tree_disconnect = SMB2_tdis,
2608         .qfs_tcon = smb3_qfs_tcon,
2609         .is_path_accessible = smb2_is_path_accessible,
2610         .can_echo = smb2_can_echo,
2611         .echo = SMB2_echo,
2612         .query_path_info = smb2_query_path_info,
2613         .get_srv_inum = smb2_get_srv_inum,
2614         .query_file_info = smb2_query_file_info,
2615         .set_path_size = smb2_set_path_size,
2616         .set_file_size = smb2_set_file_size,
2617         .set_file_info = smb2_set_file_info,
2618         .set_compression = smb2_set_compression,
2619         .mkdir = smb2_mkdir,
2620         .mkdir_setinfo = smb2_mkdir_setinfo,
2621         .rmdir = smb2_rmdir,
2622         .unlink = smb2_unlink,
2623         .rename = smb2_rename_path,
2624         .create_hardlink = smb2_create_hardlink,
2625         .query_symlink = smb2_query_symlink,
2626         .query_mf_symlink = smb3_query_mf_symlink,
2627         .create_mf_symlink = smb3_create_mf_symlink,
2628         .open = smb2_open_file,
2629         .set_fid = smb2_set_fid,
2630         .close = smb2_close_file,
2631         .flush = smb2_flush_file,
2632         .async_readv = smb2_async_readv,
2633         .async_writev = smb2_async_writev,
2634         .sync_read = smb2_sync_read,
2635         .sync_write = smb2_sync_write,
2636         .query_dir_first = smb2_query_dir_first,
2637         .query_dir_next = smb2_query_dir_next,
2638         .close_dir = smb2_close_dir,
2639         .calc_smb_size = smb2_calc_size,
2640         .is_status_pending = smb2_is_status_pending,
2641         .oplock_response = smb2_oplock_response,
2642         .queryfs = smb2_queryfs,
2643         .mand_lock = smb2_mand_lock,
2644         .mand_unlock_range = smb2_unlock_range,
2645         .push_mand_locks = smb2_push_mandatory_locks,
2646         .get_lease_key = smb2_get_lease_key,
2647         .set_lease_key = smb2_set_lease_key,
2648         .new_lease_key = smb2_new_lease_key,
2649         .generate_signingkey = generate_smb311signingkey,
2650         .calc_signature = smb3_calc_signature,
2651         .set_integrity  = smb3_set_integrity,
2652         .is_read_op = smb21_is_read_op,
2653         .set_oplock_level = smb3_set_oplock_level,
2654         .create_lease_buf = smb3_create_lease_buf,
2655         .parse_lease_buf = smb3_parse_lease_buf,
2656         .copychunk_range = smb2_copychunk_range,
2657         .duplicate_extents = smb2_duplicate_extents,
2658 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
2659         .wp_retry_size = smb2_wp_retry_size,
2660         .dir_needs_close = smb2_dir_needs_close,
2661         .fallocate = smb3_fallocate,
2662         .enum_snapshots = smb3_enum_snapshots,
2663         .init_transform_rq = smb3_init_transform_rq,
2664         .free_transform_rq = smb3_free_transform_rq,
2665         .is_transform_hdr = smb3_is_transform_hdr,
2666         .receive_transform = smb3_receive_transform,
2667         .get_dfs_refer = smb2_get_dfs_refer,
2668         .select_sectype = smb2_select_sectype,
2669 };
2670 #endif /* CIFS_SMB311 */
2671
2672 struct smb_version_values smb20_values = {
2673         .version_string = SMB20_VERSION_STRING,
2674         .protocol_id = SMB20_PROT_ID,
2675         .req_capabilities = 0, /* MBZ */
2676         .large_lock_type = 0,
2677         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2678         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2679         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2680         .header_size = sizeof(struct smb2_hdr),
2681         .max_header_size = MAX_SMB2_HDR_SIZE,
2682         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2683         .lock_cmd = SMB2_LOCK,
2684         .cap_unix = 0,
2685         .cap_nt_find = SMB2_NT_FIND,
2686         .cap_large_files = SMB2_LARGE_FILES,
2687         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2688         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2689         .create_lease_size = sizeof(struct create_lease),
2690 };
2691
2692 struct smb_version_values smb21_values = {
2693         .version_string = SMB21_VERSION_STRING,
2694         .protocol_id = SMB21_PROT_ID,
2695         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
2696         .large_lock_type = 0,
2697         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2698         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2699         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2700         .header_size = sizeof(struct smb2_hdr),
2701         .max_header_size = MAX_SMB2_HDR_SIZE,
2702         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2703         .lock_cmd = SMB2_LOCK,
2704         .cap_unix = 0,
2705         .cap_nt_find = SMB2_NT_FIND,
2706         .cap_large_files = SMB2_LARGE_FILES,
2707         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2708         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2709         .create_lease_size = sizeof(struct create_lease),
2710 };
2711
2712 struct smb_version_values smb30_values = {
2713         .version_string = SMB30_VERSION_STRING,
2714         .protocol_id = SMB30_PROT_ID,
2715         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2716         .large_lock_type = 0,
2717         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2718         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2719         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2720         .header_size = sizeof(struct smb2_hdr),
2721         .max_header_size = MAX_SMB2_HDR_SIZE,
2722         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2723         .lock_cmd = SMB2_LOCK,
2724         .cap_unix = 0,
2725         .cap_nt_find = SMB2_NT_FIND,
2726         .cap_large_files = SMB2_LARGE_FILES,
2727         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2728         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2729         .create_lease_size = sizeof(struct create_lease_v2),
2730 };
2731
2732 struct smb_version_values smb302_values = {
2733         .version_string = SMB302_VERSION_STRING,
2734         .protocol_id = SMB302_PROT_ID,
2735         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
2736         .large_lock_type = 0,
2737         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2738         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2739         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2740         .header_size = sizeof(struct smb2_hdr),
2741         .max_header_size = MAX_SMB2_HDR_SIZE,
2742         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2743         .lock_cmd = SMB2_LOCK,
2744         .cap_unix = 0,
2745         .cap_nt_find = SMB2_NT_FIND,
2746         .cap_large_files = SMB2_LARGE_FILES,
2747         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2748         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2749         .create_lease_size = sizeof(struct create_lease_v2),
2750 };
2751
2752 #ifdef CONFIG_CIFS_SMB311
2753 struct smb_version_values smb311_values = {
2754         .version_string = SMB311_VERSION_STRING,
2755         .protocol_id = SMB311_PROT_ID,
2756         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
2757         .large_lock_type = 0,
2758         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
2759         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
2760         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
2761         .header_size = sizeof(struct smb2_hdr),
2762         .max_header_size = MAX_SMB2_HDR_SIZE,
2763         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2764         .lock_cmd = SMB2_LOCK,
2765         .cap_unix = 0,
2766         .cap_nt_find = SMB2_NT_FIND,
2767         .cap_large_files = SMB2_LARGE_FILES,
2768         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
2769         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
2770         .create_lease_size = sizeof(struct create_lease_v2),
2771 };
2772 #endif /* SMB311 */