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 "cifsglob.h"
  23 #include "smb2pdu.h"
  24 #include "smb2proto.h"
  25 #include "cifsproto.h"
  26 #include "cifs_debug.h"
  27 #include "cifs_unicode.h"
  28 #include "smb2status.h"
  29 #include "smb2glob.h"
  30
  31 static int
  32 change_conf(struct TCP_Server_Info *server)
  33 {
  34         server->credits += server->echo_credits + server->oplock_credits;
  35         server->oplock_credits = server->echo_credits = 0;
  36         switch (server->credits) {
  37         case 0:
  38                 return -1;
  39         case 1:
  40                 server->echoes = false;
  41                 server->oplocks = false;
  42                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  43                 break;
  44         case 2:
  45                 server->echoes = true;
  46                 server->oplocks = false;
  47                 server->echo_credits = 1;
  48                 cifs_dbg(FYI, "disabling oplocks\n");
  49                 break;
  50         default:
  51                 server->echoes = true;
  52                 server->oplocks = true;
  53                 server->echo_credits = 1;
  54                 server->oplock_credits = 1;
  55         }
  56         server->credits -= server->echo_credits + server->oplock_credits;
  57         return 0;
  58 }
  59
  60 static void
  61 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  62                  const int optype)
  63 {
  64         int *val, rc = 0;
  65         spin_lock(&server->req_lock);
  66         val = server->ops->get_credits_field(server, optype);
  67         *val += add;
  68         server->in_flight--;
  69         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  70                 rc = change_conf(server);
  71         /*
  72          * Sometimes server returns 0 credits on oplock break ack - we need to
  73          * rebalance credits in this case.
  74          */
  75         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  76                  server->oplocks) {
  77                 if (server->credits > 1) {
  78                         server->credits--;
  79                         server->oplock_credits++;
  80                 }
  81         }
  82         spin_unlock(&server->req_lock);
  83         wake_up(&server->request_q);
  84         if (rc)
  85                 cifs_reconnect(server);
  86 }
  87
  88 static void
  89 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  90 {
  91         spin_lock(&server->req_lock);
  92         server->credits = val;
  93         spin_unlock(&server->req_lock);
  94 }
  95
  96 static int *
  97 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  98 {
  99         switch (optype) {
 100         case CIFS_ECHO_OP:
 101                 return &server->echo_credits;
 102         case CIFS_OBREAK_OP:
 103                 return &server->oplock_credits;
 104         default:
 105                 return &server->credits;
 106         }
 107 }
 108
 109 static unsigned int
 110 smb2_get_credits(struct mid_q_entry *mid)
 111 {
 112         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 113 }
 114
 115 static __u64
 116 smb2_get_next_mid(struct TCP_Server_Info *server)
 117 {
 118         __u64 mid;
 119         /* for SMB2 we need the current value */
 120         spin_lock(&GlobalMid_Lock);
 121         mid = server->CurrentMid++;
 122         spin_unlock(&GlobalMid_Lock);
 123         return mid;
 124 }
 125
 126 static struct mid_q_entry *
 127 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 128 {
 129         struct mid_q_entry *mid;
 130         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 131
 132         spin_lock(&GlobalMid_Lock);
 133         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 134                 if ((mid->mid == hdr->MessageId) &&
 135                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 136                     (mid->command == hdr->Command)) {
 137                         spin_unlock(&GlobalMid_Lock);
 138                         return mid;
 139                 }
 140         }
 141         spin_unlock(&GlobalMid_Lock);
 142         return NULL;
 143 }
 144
 145 static void
 146 smb2_dump_detail(void *buf)
 147 {
 148 #ifdef CONFIG_CIFS_DEBUG2
 149         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 150
 151         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 152                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 153                  smb->ProcessId);
 154         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 155 #endif
 156 }
 157
 158 static bool
 159 smb2_need_neg(struct TCP_Server_Info *server)
 160 {
 161         return server->max_read == 0;
 162 }
 163
 164 static int
 165 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 166 {
 167         int rc;
 168         ses->server->CurrentMid = 0;
 169         rc = SMB2_negotiate(xid, ses);
 170         /* BB we probably don't need to retry with modern servers */
 171         if (rc == -EAGAIN)
 172                 rc = -EHOSTDOWN;
 173         return rc;
 174 }
 175
 176 static unsigned int
 177 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 178 {
 179         struct TCP_Server_Info *server = tcon->ses->server;
 180         unsigned int wsize;
 181
 182         /* start with specified wsize, or default */
 183         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 184         wsize = min_t(unsigned int, wsize, server->max_write);
 185         /*
 186          * limit write size to 2 ** 16, because we don't support multicredit
 187          * requests now.
 188          */
 189         wsize = min_t(unsigned int, wsize, 2 << 15);
 190
 191         return wsize;
 192 }
 193
 194 static unsigned int
 195 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 196 {
 197         struct TCP_Server_Info *server = tcon->ses->server;
 198         unsigned int rsize;
 199
 200         /* start with specified rsize, or default */
 201         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 202         rsize = min_t(unsigned int, rsize, server->max_read);
 203         /*
 204          * limit write size to 2 ** 16, because we don't support multicredit
 205          * requests now.
 206          */
 207         rsize = min_t(unsigned int, rsize, 2 << 15);
 208
 209         return rsize;
 210 }
 211
 212 static void
 213 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 214 {
 215         int rc;
 216         __le16 srch_path = 0; /* Null - open root of share */
 217         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 218         struct cifs_open_parms oparms;
 219         struct cifs_fid fid;
 220
 221         oparms.tcon = tcon;
 222         oparms.desired_access = FILE_READ_ATTRIBUTES;
 223         oparms.disposition = FILE_OPEN;
 224         oparms.create_options = 0;
 225         oparms.fid = &fid;
 226         oparms.reconnect = false;
 227
 228         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 229         if (rc)
 230                 return;
 231
 232         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 233                         FS_ATTRIBUTE_INFORMATION);
 234         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 235                         FS_DEVICE_INFORMATION);
 236         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 237                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 238         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 239         return;
 240 }
 241
 242 static void
 243 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 244 {
 245         int rc;
 246         __le16 srch_path = 0; /* Null - open root of share */
 247         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 248         struct cifs_open_parms oparms;
 249         struct cifs_fid fid;
 250
 251         oparms.tcon = tcon;
 252         oparms.desired_access = FILE_READ_ATTRIBUTES;
 253         oparms.disposition = FILE_OPEN;
 254         oparms.create_options = 0;
 255         oparms.fid = &fid;
 256         oparms.reconnect = false;
 257
 258         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 259         if (rc)
 260                 return;
 261
 262         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 263                         FS_ATTRIBUTE_INFORMATION);
 264         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 265                         FS_DEVICE_INFORMATION);
 266         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 267         return;
 268 }
 269
 270 static int
 271 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 272                         struct cifs_sb_info *cifs_sb, const char *full_path)
 273 {
 274         int rc;
 275         __le16 *utf16_path;
 276         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 277         struct cifs_open_parms oparms;
 278         struct cifs_fid fid;
 279
 280         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 281         if (!utf16_path)
 282                 return -ENOMEM;
 283
 284         oparms.tcon = tcon;
 285         oparms.desired_access = FILE_READ_ATTRIBUTES;
 286         oparms.disposition = FILE_OPEN;
 287         oparms.create_options = 0;
 288         oparms.fid = &fid;
 289         oparms.reconnect = false;
 290
 291         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 292         if (rc) {
 293                 kfree(utf16_path);
 294                 return rc;
 295         }
 296
 297         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 298         kfree(utf16_path);
 299         return rc;
 300 }
 301
 302 static int
 303 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 304                   struct cifs_sb_info *cifs_sb, const char *full_path,
 305                   u64 *uniqueid, FILE_ALL_INFO *data)
 306 {
 307         *uniqueid = le64_to_cpu(data->IndexNumber);
 308         return 0;
 309 }
 310
 311 static int
 312 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 313                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 314 {
 315         int rc;
 316         struct smb2_file_all_info *smb2_data;
 317
 318         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 319                             GFP_KERNEL);
 320         if (smb2_data == NULL)
 321                 return -ENOMEM;
 322
 323         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 324                              smb2_data);
 325         if (!rc)
 326                 move_smb2_info_to_cifs(data, smb2_data);
 327         kfree(smb2_data);
 328         return rc;
 329 }
 330
 331 static bool
 332 smb2_can_echo(struct TCP_Server_Info *server)
 333 {
 334         return server->echoes;
 335 }
 336
 337 static void
 338 smb2_clear_stats(struct cifs_tcon *tcon)
 339 {
 340 #ifdef CONFIG_CIFS_STATS
 341         int i;
 342         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 343                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 344                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 345         }
 346 #endif
 347 }
 348
 349 static void
 350 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 351 {
 352         seq_puts(m, "\n\tShare Capabilities:");
 353         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 354                 seq_puts(m, " DFS,");
 355         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 356                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 357         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 358                 seq_puts(m, " SCALEOUT,");
 359         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 360                 seq_puts(m, " CLUSTER,");
 361         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 362                 seq_puts(m, " ASYMMETRIC,");
 363         if (tcon->capabilities == 0)
 364                 seq_puts(m, " None");
 365         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 366                 seq_puts(m, " Aligned,");
 367         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 368                 seq_puts(m, " Partition Aligned,");
 369         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 370                 seq_puts(m, " SSD,");
 371         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 372                 seq_puts(m, " TRIM-support,");
 373
 374         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 375         if (tcon->perf_sector_size)
 376                 seq_printf(m, "\tOptimal sector size: 0x%x",
 377                            tcon->perf_sector_size);
 378 }
 379
 380 static void
 381 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 382 {
 383 #ifdef CONFIG_CIFS_STATS
 384         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 385         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 386         seq_printf(m, "\nNegotiates: %d sent %d failed",
 387                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 388                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 389         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 390                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 391                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 392         seq_printf(m, "\nLogoffs: %d sent %d failed",
 393                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 394                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 395         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 396                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 397                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 398         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 399                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 400                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 401         seq_printf(m, "\nCreates: %d sent %d failed",
 402                    atomic_read(&sent[SMB2_CREATE_HE]),
 403                    atomic_read(&failed[SMB2_CREATE_HE]));
 404         seq_printf(m, "\nCloses: %d sent %d failed",
 405                    atomic_read(&sent[SMB2_CLOSE_HE]),
 406                    atomic_read(&failed[SMB2_CLOSE_HE]));
 407         seq_printf(m, "\nFlushes: %d sent %d failed",
 408                    atomic_read(&sent[SMB2_FLUSH_HE]),
 409                    atomic_read(&failed[SMB2_FLUSH_HE]));
 410         seq_printf(m, "\nReads: %d sent %d failed",
 411                    atomic_read(&sent[SMB2_READ_HE]),
 412                    atomic_read(&failed[SMB2_READ_HE]));
 413         seq_printf(m, "\nWrites: %d sent %d failed",
 414                    atomic_read(&sent[SMB2_WRITE_HE]),
 415                    atomic_read(&failed[SMB2_WRITE_HE]));
 416         seq_printf(m, "\nLocks: %d sent %d failed",
 417                    atomic_read(&sent[SMB2_LOCK_HE]),
 418                    atomic_read(&failed[SMB2_LOCK_HE]));
 419         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 420                    atomic_read(&sent[SMB2_IOCTL_HE]),
 421                    atomic_read(&failed[SMB2_IOCTL_HE]));
 422         seq_printf(m, "\nCancels: %d sent %d failed",
 423                    atomic_read(&sent[SMB2_CANCEL_HE]),
 424                    atomic_read(&failed[SMB2_CANCEL_HE]));
 425         seq_printf(m, "\nEchos: %d sent %d failed",
 426                    atomic_read(&sent[SMB2_ECHO_HE]),
 427                    atomic_read(&failed[SMB2_ECHO_HE]));
 428         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 429                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 430                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 431         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 432                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 433                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 434         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 435                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 436                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 437         seq_printf(m, "\nSetInfos: %d sent %d failed",
 438                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 439                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 440         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 441                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 442                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 443 #endif
 444 }
 445
 446 static void
 447 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 448 {
 449         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 450         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 451
 452         cfile->fid.persistent_fid = fid->persistent_fid;
 453         cfile->fid.volatile_fid = fid->volatile_fid;
 454         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 455                                       &fid->purge_cache);
 456         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 457 }
 458
 459 static void
 460 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 461                 struct cifs_fid *fid)
 462 {
 463         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 464 }
 465
 466 static int
 467 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 468                 struct cifs_fid *fid)
 469 {
 470         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 471 }
 472
 473 static unsigned int
 474 smb2_read_data_offset(char *buf)
 475 {
 476         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 477         return rsp->DataOffset;
 478 }
 479
 480 static unsigned int
 481 smb2_read_data_length(char *buf)
 482 {
 483         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 484         return le32_to_cpu(rsp->DataLength);
 485 }
 486
 487
 488 static int
 489 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 490                struct cifs_io_parms *parms, unsigned int *bytes_read,
 491                char **buf, int *buf_type)
 492 {
 493         parms->persistent_fid = cfile->fid.persistent_fid;
 494         parms->volatile_fid = cfile->fid.volatile_fid;
 495         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 496 }
 497
 498 static int
 499 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 500                 struct cifs_io_parms *parms, unsigned int *written,
 501                 struct kvec *iov, unsigned long nr_segs)
 502 {
 503
 504         parms->persistent_fid = cfile->fid.persistent_fid;
 505         parms->volatile_fid = cfile->fid.volatile_fid;
 506         return SMB2_write(xid, parms, written, iov, nr_segs);
 507 }
 508
 509 static int
 510 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 511                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 512 {
 513         __le64 eof = cpu_to_le64(size);
 514         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 515                             cfile->fid.volatile_fid, cfile->pid, &eof);
 516 }
 517
 518 static int
 519 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 520                    struct cifsFileInfo *cfile)
 521 {
 522         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 523                             cfile->fid.volatile_fid);
 524 }
 525
 526 static int
 527 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 528                      const char *path, struct cifs_sb_info *cifs_sb,
 529                      struct cifs_fid *fid, __u16 search_flags,
 530                      struct cifs_search_info *srch_inf)
 531 {
 532         __le16 *utf16_path;
 533         int rc;
 534         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 535         struct cifs_open_parms oparms;
 536
 537         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 538         if (!utf16_path)
 539                 return -ENOMEM;
 540
 541         oparms.tcon = tcon;
 542         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 543         oparms.disposition = FILE_OPEN;
 544         oparms.create_options = 0;
 545         oparms.fid = fid;
 546         oparms.reconnect = false;
 547
 548         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 549         kfree(utf16_path);
 550         if (rc) {
 551                 cifs_dbg(VFS, "open dir failed\n");
 552                 return rc;
 553         }
 554
 555         srch_inf->entries_in_buffer = 0;
 556         srch_inf->index_of_last_entry = 0;
 557
 558         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 559                                   fid->volatile_fid, 0, srch_inf);
 560         if (rc) {
 561                 cifs_dbg(VFS, "query directory failed\n");
 562                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 563         }
 564         return rc;
 565 }
 566
 567 static int
 568 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 569                     struct cifs_fid *fid, __u16 search_flags,
 570                     struct cifs_search_info *srch_inf)
 571 {
 572         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 573                                     fid->volatile_fid, 0, srch_inf);
 574 }
 575
 576 static int
 577 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 578                struct cifs_fid *fid)
 579 {
 580         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 581 }
 582
 583 /*
 584 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 585 * the number of credits and return true. Otherwise - return false.
 586 */
 587 static bool
 588 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 589 {
 590         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 591
 592         if (hdr->Status != STATUS_PENDING)
 593                 return false;
 594
 595         if (!length) {
 596                 spin_lock(&server->req_lock);
 597                 server->credits += le16_to_cpu(hdr->CreditRequest);
 598                 spin_unlock(&server->req_lock);
 599                 wake_up(&server->request_q);
 600         }
 601
 602         return true;
 603 }
 604
 605 static int
 606 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 607                      struct cifsInodeInfo *cinode)
 608 {
 609         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 610                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 611                                         smb2_get_lease_state(cinode));
 612
 613         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 614                                  fid->volatile_fid,
 615                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 616 }
 617
 618 static int
 619 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 620              struct kstatfs *buf)
 621 {
 622         int rc;
 623         __le16 srch_path = 0; /* Null - open root of share */
 624         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 625         struct cifs_open_parms oparms;
 626         struct cifs_fid fid;
 627
 628         oparms.tcon = tcon;
 629         oparms.desired_access = FILE_READ_ATTRIBUTES;
 630         oparms.disposition = FILE_OPEN;
 631         oparms.create_options = 0;
 632         oparms.fid = &fid;
 633         oparms.reconnect = false;
 634
 635         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 636         if (rc)
 637                 return rc;
 638         buf->f_type = SMB2_MAGIC_NUMBER;
 639         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 640                            buf);
 641         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 642         return rc;
 643 }
 644
 645 static bool
 646 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 647 {
 648         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 649                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 650 }
 651
 652 static int
 653 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 654                __u64 length, __u32 type, int lock, int unlock, bool wait)
 655 {
 656         if (unlock && !lock)
 657                 type = SMB2_LOCKFLAG_UNLOCK;
 658         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 659                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 660                          current->tgid, length, offset, type, wait);
 661 }
 662
 663 static void
 664 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 665 {
 666         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 667 }
 668
 669 static void
 670 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 671 {
 672         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 673 }
 674
 675 static void
 676 smb2_new_lease_key(struct cifs_fid *fid)
 677 {
 678         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 679 }
 680
 681 static int
 682 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 683                    const char *full_path, char **target_path,
 684                    struct cifs_sb_info *cifs_sb)
 685 {
 686         int rc;
 687         __le16 *utf16_path;
 688         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 689         struct cifs_open_parms oparms;
 690         struct cifs_fid fid;
 691         struct smb2_err_rsp *err_buf = NULL;
 692         struct smb2_symlink_err_rsp *symlink;
 693         unsigned int sub_len, sub_offset;
 694
 695         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 696
 697         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 698         if (!utf16_path)
 699                 return -ENOMEM;
 700
 701         oparms.tcon = tcon;
 702         oparms.desired_access = FILE_READ_ATTRIBUTES;
 703         oparms.disposition = FILE_OPEN;
 704         oparms.create_options = 0;
 705         oparms.fid = &fid;
 706         oparms.reconnect = false;
 707
 708         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 709
 710         if (!rc || !err_buf) {
 711                 kfree(utf16_path);
 712                 return -ENOENT;
 713         }
 714         /* open must fail on symlink - reset rc */
 715         rc = 0;
 716         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 717         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 718         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 719         *target_path = cifs_strndup_from_utf16(
 720                                 (char *)symlink->PathBuffer + sub_offset,
 721                                 sub_len, true, cifs_sb->local_nls);
 722         if (!(*target_path)) {
 723                 kfree(utf16_path);
 724                 return -ENOMEM;
 725         }
 726         convert_delimiter(*target_path, '/');
 727         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 728         kfree(utf16_path);
 729         return rc;
 730 }
 731
 732 static void
 733 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 734                       unsigned int epoch, bool *purge_cache)
 735 {
 736         oplock &= 0xFF;
 737         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 738                 return;
 739         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 740                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 741                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 742                          &cinode->vfs_inode);
 743         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 744                 cinode->oplock = CIFS_CACHE_RW_FLG;
 745                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 746                          &cinode->vfs_inode);
 747         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 748                 cinode->oplock = CIFS_CACHE_READ_FLG;
 749                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 750                          &cinode->vfs_inode);
 751         } else
 752                 cinode->oplock = 0;
 753 }
 754
 755 static void
 756 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 757                        unsigned int epoch, bool *purge_cache)
 758 {
 759         char message[5] = {0};
 760
 761         oplock &= 0xFF;
 762         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 763                 return;
 764
 765         cinode->oplock = 0;
 766         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
 767                 cinode->oplock |= CIFS_CACHE_READ_FLG;
 768                 strcat(message, "R");
 769         }
 770         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
 771                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
 772                 strcat(message, "H");
 773         }
 774         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
 775                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
 776                 strcat(message, "W");
 777         }
 778         if (!cinode->oplock)
 779                 strcat(message, "None");
 780         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 781                  &cinode->vfs_inode);
 782 }
 783
 784 static void
 785 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 786                       unsigned int epoch, bool *purge_cache)
 787 {
 788         unsigned int old_oplock = cinode->oplock;
 789
 790         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
 791
 792         if (purge_cache) {
 793                 *purge_cache = false;
 794                 if (old_oplock == CIFS_CACHE_READ_FLG) {
 795                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
 796                             (epoch - cinode->epoch > 0))
 797                                 *purge_cache = true;
 798                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 799                                  (epoch - cinode->epoch > 1))
 800                                 *purge_cache = true;
 801                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 802                                  (epoch - cinode->epoch > 1))
 803                                 *purge_cache = true;
 804                         else if (cinode->oplock == 0 &&
 805                                  (epoch - cinode->epoch > 0))
 806                                 *purge_cache = true;
 807                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
 808                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 809                             (epoch - cinode->epoch > 0))
 810                                 *purge_cache = true;
 811                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 812                                  (epoch - cinode->epoch > 1))
 813                                 *purge_cache = true;
 814                 }
 815                 cinode->epoch = epoch;
 816         }
 817 }
 818
 819 static bool
 820 smb2_is_read_op(__u32 oplock)
 821 {
 822         return oplock == SMB2_OPLOCK_LEVEL_II;
 823 }
 824
 825 static bool
 826 smb21_is_read_op(__u32 oplock)
 827 {
 828         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
 829                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
 830 }
 831
 832 static __le32
 833 map_oplock_to_lease(u8 oplock)
 834 {
 835         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
 836                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
 837         else if (oplock == SMB2_OPLOCK_LEVEL_II)
 838                 return SMB2_LEASE_READ_CACHING;
 839         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
 840                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
 841                        SMB2_LEASE_WRITE_CACHING;
 842         return 0;
 843 }
 844
 845 static char *
 846 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
 847 {
 848         struct create_lease *buf;
 849
 850         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
 851         if (!buf)
 852                 return NULL;
 853
 854         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 855         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 856         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 857
 858         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 859                                         (struct create_lease, lcontext));
 860         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
 861         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 862                                 (struct create_lease, Name));
 863         buf->ccontext.NameLength = cpu_to_le16(4);
 864         buf->Name[0] = 'R';
 865         buf->Name[1] = 'q';
 866         buf->Name[2] = 'L';
 867         buf->Name[3] = 's';
 868         return (char *)buf;
 869 }
 870
 871 static char *
 872 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
 873 {
 874         struct create_lease_v2 *buf;
 875
 876         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
 877         if (!buf)
 878                 return NULL;
 879
 880         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 881         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 882         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 883
 884         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 885                                         (struct create_lease_v2, lcontext));
 886         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
 887         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 888                                 (struct create_lease_v2, Name));
 889         buf->ccontext.NameLength = cpu_to_le16(4);
 890         buf->Name[0] = 'R';
 891         buf->Name[1] = 'q';
 892         buf->Name[2] = 'L';
 893         buf->Name[3] = 's';
 894         return (char *)buf;
 895 }
 896
 897 static __u8
 898 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
 899 {
 900         struct create_lease *lc = (struct create_lease *)buf;
 901
 902         *epoch = 0; /* not used */
 903         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 904                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 905         return le32_to_cpu(lc->lcontext.LeaseState);
 906 }
 907
 908 static __u8
 909 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
 910 {
 911         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
 912
 913         *epoch = le16_to_cpu(lc->lcontext.Epoch);
 914         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 915                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 916         return le32_to_cpu(lc->lcontext.LeaseState);
 917 }
 918
 919 struct smb_version_operations smb20_operations = {
 920         .compare_fids = smb2_compare_fids,
 921         .setup_request = smb2_setup_request,
 922         .setup_async_request = smb2_setup_async_request,
 923         .check_receive = smb2_check_receive,
 924         .add_credits = smb2_add_credits,
 925         .set_credits = smb2_set_credits,
 926         .get_credits_field = smb2_get_credits_field,
 927         .get_credits = smb2_get_credits,
 928         .get_next_mid = smb2_get_next_mid,
 929         .read_data_offset = smb2_read_data_offset,
 930         .read_data_length = smb2_read_data_length,
 931         .map_error = map_smb2_to_linux_error,
 932         .find_mid = smb2_find_mid,
 933         .check_message = smb2_check_message,
 934         .dump_detail = smb2_dump_detail,
 935         .clear_stats = smb2_clear_stats,
 936         .print_stats = smb2_print_stats,
 937         .is_oplock_break = smb2_is_valid_oplock_break,
 938         .need_neg = smb2_need_neg,
 939         .negotiate = smb2_negotiate,
 940         .negotiate_wsize = smb2_negotiate_wsize,
 941         .negotiate_rsize = smb2_negotiate_rsize,
 942         .sess_setup = SMB2_sess_setup,
 943         .logoff = SMB2_logoff,
 944         .tree_connect = SMB2_tcon,
 945         .tree_disconnect = SMB2_tdis,
 946         .qfs_tcon = smb2_qfs_tcon,
 947         .is_path_accessible = smb2_is_path_accessible,
 948         .can_echo = smb2_can_echo,
 949         .echo = SMB2_echo,
 950         .query_path_info = smb2_query_path_info,
 951         .get_srv_inum = smb2_get_srv_inum,
 952         .query_file_info = smb2_query_file_info,
 953         .set_path_size = smb2_set_path_size,
 954         .set_file_size = smb2_set_file_size,
 955         .set_file_info = smb2_set_file_info,
 956         .set_compression = smb2_set_compression,
 957         .mkdir = smb2_mkdir,
 958         .mkdir_setinfo = smb2_mkdir_setinfo,
 959         .rmdir = smb2_rmdir,
 960         .unlink = smb2_unlink,
 961         .rename = smb2_rename_path,
 962         .create_hardlink = smb2_create_hardlink,
 963         .query_symlink = smb2_query_symlink,
 964         .open = smb2_open_file,
 965         .set_fid = smb2_set_fid,
 966         .close = smb2_close_file,
 967         .flush = smb2_flush_file,
 968         .async_readv = smb2_async_readv,
 969         .async_writev = smb2_async_writev,
 970         .sync_read = smb2_sync_read,
 971         .sync_write = smb2_sync_write,
 972         .query_dir_first = smb2_query_dir_first,
 973         .query_dir_next = smb2_query_dir_next,
 974         .close_dir = smb2_close_dir,
 975         .calc_smb_size = smb2_calc_size,
 976         .is_status_pending = smb2_is_status_pending,
 977         .oplock_response = smb2_oplock_response,
 978         .queryfs = smb2_queryfs,
 979         .mand_lock = smb2_mand_lock,
 980         .mand_unlock_range = smb2_unlock_range,
 981         .push_mand_locks = smb2_push_mandatory_locks,
 982         .get_lease_key = smb2_get_lease_key,
 983         .set_lease_key = smb2_set_lease_key,
 984         .new_lease_key = smb2_new_lease_key,
 985         .calc_signature = smb2_calc_signature,
 986         .is_read_op = smb2_is_read_op,
 987         .set_oplock_level = smb2_set_oplock_level,
 988         .create_lease_buf = smb2_create_lease_buf,
 989         .parse_lease_buf = smb2_parse_lease_buf,
 990 };
 991
 992 struct smb_version_operations smb21_operations = {
 993         .compare_fids = smb2_compare_fids,
 994         .setup_request = smb2_setup_request,
 995         .setup_async_request = smb2_setup_async_request,
 996         .check_receive = smb2_check_receive,
 997         .add_credits = smb2_add_credits,
 998         .set_credits = smb2_set_credits,
 999         .get_credits_field = smb2_get_credits_field,
1000         .get_credits = smb2_get_credits,
1001         .get_next_mid = smb2_get_next_mid,
1002         .read_data_offset = smb2_read_data_offset,
1003         .read_data_length = smb2_read_data_length,
1004         .map_error = map_smb2_to_linux_error,
1005         .find_mid = smb2_find_mid,
1006         .check_message = smb2_check_message,
1007         .dump_detail = smb2_dump_detail,
1008         .clear_stats = smb2_clear_stats,
1009         .print_stats = smb2_print_stats,
1010         .is_oplock_break = smb2_is_valid_oplock_break,
1011         .need_neg = smb2_need_neg,
1012         .negotiate = smb2_negotiate,
1013         .negotiate_wsize = smb2_negotiate_wsize,
1014         .negotiate_rsize = smb2_negotiate_rsize,
1015         .sess_setup = SMB2_sess_setup,
1016         .logoff = SMB2_logoff,
1017         .tree_connect = SMB2_tcon,
1018         .tree_disconnect = SMB2_tdis,
1019         .qfs_tcon = smb2_qfs_tcon,
1020         .is_path_accessible = smb2_is_path_accessible,
1021         .can_echo = smb2_can_echo,
1022         .echo = SMB2_echo,
1023         .query_path_info = smb2_query_path_info,
1024         .get_srv_inum = smb2_get_srv_inum,
1025         .query_file_info = smb2_query_file_info,
1026         .set_path_size = smb2_set_path_size,
1027         .set_file_size = smb2_set_file_size,
1028         .set_file_info = smb2_set_file_info,
1029         .set_compression = smb2_set_compression,
1030         .mkdir = smb2_mkdir,
1031         .mkdir_setinfo = smb2_mkdir_setinfo,
1032         .rmdir = smb2_rmdir,
1033         .unlink = smb2_unlink,
1034         .rename = smb2_rename_path,
1035         .create_hardlink = smb2_create_hardlink,
1036         .query_symlink = smb2_query_symlink,
1037         .open = smb2_open_file,
1038         .set_fid = smb2_set_fid,
1039         .close = smb2_close_file,
1040         .flush = smb2_flush_file,
1041         .async_readv = smb2_async_readv,
1042         .async_writev = smb2_async_writev,
1043         .sync_read = smb2_sync_read,
1044         .sync_write = smb2_sync_write,
1045         .query_dir_first = smb2_query_dir_first,
1046         .query_dir_next = smb2_query_dir_next,
1047         .close_dir = smb2_close_dir,
1048         .calc_smb_size = smb2_calc_size,
1049         .is_status_pending = smb2_is_status_pending,
1050         .oplock_response = smb2_oplock_response,
1051         .queryfs = smb2_queryfs,
1052         .mand_lock = smb2_mand_lock,
1053         .mand_unlock_range = smb2_unlock_range,
1054         .push_mand_locks = smb2_push_mandatory_locks,
1055         .get_lease_key = smb2_get_lease_key,
1056         .set_lease_key = smb2_set_lease_key,
1057         .new_lease_key = smb2_new_lease_key,
1058         .calc_signature = smb2_calc_signature,
1059         .is_read_op = smb21_is_read_op,
1060         .set_oplock_level = smb21_set_oplock_level,
1061         .create_lease_buf = smb2_create_lease_buf,
1062         .parse_lease_buf = smb2_parse_lease_buf,
1063 };
1064
1065 struct smb_version_operations smb30_operations = {
1066         .compare_fids = smb2_compare_fids,
1067         .setup_request = smb2_setup_request,
1068         .setup_async_request = smb2_setup_async_request,
1069         .check_receive = smb2_check_receive,
1070         .add_credits = smb2_add_credits,
1071         .set_credits = smb2_set_credits,
1072         .get_credits_field = smb2_get_credits_field,
1073         .get_credits = smb2_get_credits,
1074         .get_next_mid = smb2_get_next_mid,
1075         .read_data_offset = smb2_read_data_offset,
1076         .read_data_length = smb2_read_data_length,
1077         .map_error = map_smb2_to_linux_error,
1078         .find_mid = smb2_find_mid,
1079         .check_message = smb2_check_message,
1080         .dump_detail = smb2_dump_detail,
1081         .clear_stats = smb2_clear_stats,
1082         .print_stats = smb2_print_stats,
1083         .dump_share_caps = smb2_dump_share_caps,
1084         .is_oplock_break = smb2_is_valid_oplock_break,
1085         .need_neg = smb2_need_neg,
1086         .negotiate = smb2_negotiate,
1087         .negotiate_wsize = smb2_negotiate_wsize,
1088         .negotiate_rsize = smb2_negotiate_rsize,
1089         .sess_setup = SMB2_sess_setup,
1090         .logoff = SMB2_logoff,
1091         .tree_connect = SMB2_tcon,
1092         .tree_disconnect = SMB2_tdis,
1093         .qfs_tcon = smb3_qfs_tcon,
1094         .is_path_accessible = smb2_is_path_accessible,
1095         .can_echo = smb2_can_echo,
1096         .echo = SMB2_echo,
1097         .query_path_info = smb2_query_path_info,
1098         .get_srv_inum = smb2_get_srv_inum,
1099         .query_file_info = smb2_query_file_info,
1100         .set_path_size = smb2_set_path_size,
1101         .set_file_size = smb2_set_file_size,
1102         .set_file_info = smb2_set_file_info,
1103         .set_compression = smb2_set_compression,
1104         .mkdir = smb2_mkdir,
1105         .mkdir_setinfo = smb2_mkdir_setinfo,
1106         .rmdir = smb2_rmdir,
1107         .unlink = smb2_unlink,
1108         .rename = smb2_rename_path,
1109         .create_hardlink = smb2_create_hardlink,
1110         .query_symlink = smb2_query_symlink,
1111         .open = smb2_open_file,
1112         .set_fid = smb2_set_fid,
1113         .close = smb2_close_file,
1114         .flush = smb2_flush_file,
1115         .async_readv = smb2_async_readv,
1116         .async_writev = smb2_async_writev,
1117         .sync_read = smb2_sync_read,
1118         .sync_write = smb2_sync_write,
1119         .query_dir_first = smb2_query_dir_first,
1120         .query_dir_next = smb2_query_dir_next,
1121         .close_dir = smb2_close_dir,
1122         .calc_smb_size = smb2_calc_size,
1123         .is_status_pending = smb2_is_status_pending,
1124         .oplock_response = smb2_oplock_response,
1125         .queryfs = smb2_queryfs,
1126         .mand_lock = smb2_mand_lock,
1127         .mand_unlock_range = smb2_unlock_range,
1128         .push_mand_locks = smb2_push_mandatory_locks,
1129         .get_lease_key = smb2_get_lease_key,
1130         .set_lease_key = smb2_set_lease_key,
1131         .new_lease_key = smb2_new_lease_key,
1132         .generate_signingkey = generate_smb3signingkey,
1133         .calc_signature = smb3_calc_signature,
1134         .is_read_op = smb21_is_read_op,
1135         .set_oplock_level = smb3_set_oplock_level,
1136         .create_lease_buf = smb3_create_lease_buf,
1137         .parse_lease_buf = smb3_parse_lease_buf,
1138 };
1139
1140 struct smb_version_values smb20_values = {
1141         .version_string = SMB20_VERSION_STRING,
1142         .protocol_id = SMB20_PROT_ID,
1143         .req_capabilities = 0, /* MBZ */
1144         .large_lock_type = 0,
1145         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1146         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1147         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1148         .header_size = sizeof(struct smb2_hdr),
1149         .max_header_size = MAX_SMB2_HDR_SIZE,
1150         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1151         .lock_cmd = SMB2_LOCK,
1152         .cap_unix = 0,
1153         .cap_nt_find = SMB2_NT_FIND,
1154         .cap_large_files = SMB2_LARGE_FILES,
1155         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1156         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1157         .create_lease_size = sizeof(struct create_lease),
1158 };
1159
1160 struct smb_version_values smb21_values = {
1161         .version_string = SMB21_VERSION_STRING,
1162         .protocol_id = SMB21_PROT_ID,
1163         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1164         .large_lock_type = 0,
1165         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1166         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1167         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1168         .header_size = sizeof(struct smb2_hdr),
1169         .max_header_size = MAX_SMB2_HDR_SIZE,
1170         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1171         .lock_cmd = SMB2_LOCK,
1172         .cap_unix = 0,
1173         .cap_nt_find = SMB2_NT_FIND,
1174         .cap_large_files = SMB2_LARGE_FILES,
1175         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1176         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1177         .create_lease_size = sizeof(struct create_lease),
1178 };
1179
1180 struct smb_version_values smb30_values = {
1181         .version_string = SMB30_VERSION_STRING,
1182         .protocol_id = SMB30_PROT_ID,
1183         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1184         .large_lock_type = 0,
1185         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1186         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1187         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1188         .header_size = sizeof(struct smb2_hdr),
1189         .max_header_size = MAX_SMB2_HDR_SIZE,
1190         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1191         .lock_cmd = SMB2_LOCK,
1192         .cap_unix = 0,
1193         .cap_nt_find = SMB2_NT_FIND,
1194         .cap_large_files = SMB2_LARGE_FILES,
1195         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1196         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1197         .create_lease_size = sizeof(struct create_lease_v2),
1198 };
1199
1200 struct smb_version_values smb302_values = {
1201         .version_string = SMB302_VERSION_STRING,
1202         .protocol_id = SMB302_PROT_ID,
1203         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1204         .large_lock_type = 0,
1205         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1206         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1207         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1208         .header_size = sizeof(struct smb2_hdr),
1209         .max_header_size = MAX_SMB2_HDR_SIZE,
1210         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1211         .lock_cmd = SMB2_LOCK,
1212         .cap_unix = 0,
1213         .cap_nt_find = SMB2_NT_FIND,
1214         .cap_large_files = SMB2_LARGE_FILES,
1215         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1216         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1217         .create_lease_size = sizeof(struct create_lease_v2),
1218 };