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 smb2_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_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 237         return;
 238 }
 239
 240 static int
 241 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 242                         struct cifs_sb_info *cifs_sb, const char *full_path)
 243 {
 244         int rc;
 245         __le16 *utf16_path;
 246         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 247         struct cifs_open_parms oparms;
 248         struct cifs_fid fid;
 249
 250         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 251         if (!utf16_path)
 252                 return -ENOMEM;
 253
 254         oparms.tcon = tcon;
 255         oparms.desired_access = FILE_READ_ATTRIBUTES;
 256         oparms.disposition = FILE_OPEN;
 257         oparms.create_options = 0;
 258         oparms.fid = &fid;
 259         oparms.reconnect = false;
 260
 261         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 262         if (rc) {
 263                 kfree(utf16_path);
 264                 return rc;
 265         }
 266
 267         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 268         kfree(utf16_path);
 269         return rc;
 270 }
 271
 272 static int
 273 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 274                   struct cifs_sb_info *cifs_sb, const char *full_path,
 275                   u64 *uniqueid, FILE_ALL_INFO *data)
 276 {
 277         *uniqueid = le64_to_cpu(data->IndexNumber);
 278         return 0;
 279 }
 280
 281 static int
 282 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 283                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 284 {
 285         int rc;
 286         struct smb2_file_all_info *smb2_data;
 287
 288         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 289                             GFP_KERNEL);
 290         if (smb2_data == NULL)
 291                 return -ENOMEM;
 292
 293         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 294                              smb2_data);
 295         if (!rc)
 296                 move_smb2_info_to_cifs(data, smb2_data);
 297         kfree(smb2_data);
 298         return rc;
 299 }
 300
 301 static bool
 302 smb2_can_echo(struct TCP_Server_Info *server)
 303 {
 304         return server->echoes;
 305 }
 306
 307 static void
 308 smb2_clear_stats(struct cifs_tcon *tcon)
 309 {
 310 #ifdef CONFIG_CIFS_STATS
 311         int i;
 312         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 313                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 314                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 315         }
 316 #endif
 317 }
 318
 319 static void
 320 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 321 {
 322         seq_puts(m, "\n\tShare Capabilities:");
 323         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 324                 seq_puts(m, " DFS,");
 325         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 326                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 327         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 328                 seq_puts(m, " SCALEOUT,");
 329         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 330                 seq_puts(m, " CLUSTER,");
 331         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 332                 seq_puts(m, " ASYMMETRIC,");
 333         if (tcon->capabilities == 0)
 334                 seq_puts(m, " None");
 335         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 336 }
 337
 338 static void
 339 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 340 {
 341 #ifdef CONFIG_CIFS_STATS
 342         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 343         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 344         seq_printf(m, "\nNegotiates: %d sent %d failed",
 345                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 346                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 347         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 348                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 349                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 350         seq_printf(m, "\nLogoffs: %d sent %d failed",
 351                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 352                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 353         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 354                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 355                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 356         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 357                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 358                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 359         seq_printf(m, "\nCreates: %d sent %d failed",
 360                    atomic_read(&sent[SMB2_CREATE_HE]),
 361                    atomic_read(&failed[SMB2_CREATE_HE]));
 362         seq_printf(m, "\nCloses: %d sent %d failed",
 363                    atomic_read(&sent[SMB2_CLOSE_HE]),
 364                    atomic_read(&failed[SMB2_CLOSE_HE]));
 365         seq_printf(m, "\nFlushes: %d sent %d failed",
 366                    atomic_read(&sent[SMB2_FLUSH_HE]),
 367                    atomic_read(&failed[SMB2_FLUSH_HE]));
 368         seq_printf(m, "\nReads: %d sent %d failed",
 369                    atomic_read(&sent[SMB2_READ_HE]),
 370                    atomic_read(&failed[SMB2_READ_HE]));
 371         seq_printf(m, "\nWrites: %d sent %d failed",
 372                    atomic_read(&sent[SMB2_WRITE_HE]),
 373                    atomic_read(&failed[SMB2_WRITE_HE]));
 374         seq_printf(m, "\nLocks: %d sent %d failed",
 375                    atomic_read(&sent[SMB2_LOCK_HE]),
 376                    atomic_read(&failed[SMB2_LOCK_HE]));
 377         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 378                    atomic_read(&sent[SMB2_IOCTL_HE]),
 379                    atomic_read(&failed[SMB2_IOCTL_HE]));
 380         seq_printf(m, "\nCancels: %d sent %d failed",
 381                    atomic_read(&sent[SMB2_CANCEL_HE]),
 382                    atomic_read(&failed[SMB2_CANCEL_HE]));
 383         seq_printf(m, "\nEchos: %d sent %d failed",
 384                    atomic_read(&sent[SMB2_ECHO_HE]),
 385                    atomic_read(&failed[SMB2_ECHO_HE]));
 386         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 387                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 388                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 389         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 390                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 391                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 392         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 393                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 394                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 395         seq_printf(m, "\nSetInfos: %d sent %d failed",
 396                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 397                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 398         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 399                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 400                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 401 #endif
 402 }
 403
 404 static void
 405 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 406 {
 407         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 408         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 409
 410         cfile->fid.persistent_fid = fid->persistent_fid;
 411         cfile->fid.volatile_fid = fid->volatile_fid;
 412         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 413                                       &fid->purge_cache);
 414         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 415 }
 416
 417 static void
 418 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 419                 struct cifs_fid *fid)
 420 {
 421         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 422 }
 423
 424 static int
 425 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 426                 struct cifs_fid *fid)
 427 {
 428         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 429 }
 430
 431 static unsigned int
 432 smb2_read_data_offset(char *buf)
 433 {
 434         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 435         return rsp->DataOffset;
 436 }
 437
 438 static unsigned int
 439 smb2_read_data_length(char *buf)
 440 {
 441         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 442         return le32_to_cpu(rsp->DataLength);
 443 }
 444
 445
 446 static int
 447 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 448                struct cifs_io_parms *parms, unsigned int *bytes_read,
 449                char **buf, int *buf_type)
 450 {
 451         parms->persistent_fid = cfile->fid.persistent_fid;
 452         parms->volatile_fid = cfile->fid.volatile_fid;
 453         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 454 }
 455
 456 static int
 457 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 458                 struct cifs_io_parms *parms, unsigned int *written,
 459                 struct kvec *iov, unsigned long nr_segs)
 460 {
 461
 462         parms->persistent_fid = cfile->fid.persistent_fid;
 463         parms->volatile_fid = cfile->fid.volatile_fid;
 464         return SMB2_write(xid, parms, written, iov, nr_segs);
 465 }
 466
 467 static int
 468 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 469                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 470 {
 471         __le64 eof = cpu_to_le64(size);
 472         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 473                             cfile->fid.volatile_fid, cfile->pid, &eof);
 474 }
 475
 476 static int
 477 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 478                    struct cifsFileInfo *cfile)
 479 {
 480         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 481                             cfile->fid.volatile_fid);
 482 }
 483
 484 static int
 485 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 486                      const char *path, struct cifs_sb_info *cifs_sb,
 487                      struct cifs_fid *fid, __u16 search_flags,
 488                      struct cifs_search_info *srch_inf)
 489 {
 490         __le16 *utf16_path;
 491         int rc;
 492         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 493         struct cifs_open_parms oparms;
 494
 495         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 496         if (!utf16_path)
 497                 return -ENOMEM;
 498
 499         oparms.tcon = tcon;
 500         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 501         oparms.disposition = FILE_OPEN;
 502         oparms.create_options = 0;
 503         oparms.fid = fid;
 504         oparms.reconnect = false;
 505
 506         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 507         kfree(utf16_path);
 508         if (rc) {
 509                 cifs_dbg(VFS, "open dir failed\n");
 510                 return rc;
 511         }
 512
 513         srch_inf->entries_in_buffer = 0;
 514         srch_inf->index_of_last_entry = 0;
 515
 516         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 517                                   fid->volatile_fid, 0, srch_inf);
 518         if (rc) {
 519                 cifs_dbg(VFS, "query directory failed\n");
 520                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 521         }
 522         return rc;
 523 }
 524
 525 static int
 526 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 527                     struct cifs_fid *fid, __u16 search_flags,
 528                     struct cifs_search_info *srch_inf)
 529 {
 530         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 531                                     fid->volatile_fid, 0, srch_inf);
 532 }
 533
 534 static int
 535 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 536                struct cifs_fid *fid)
 537 {
 538         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 539 }
 540
 541 /*
 542 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 543 * the number of credits and return true. Otherwise - return false.
 544 */
 545 static bool
 546 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 547 {
 548         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 549
 550         if (hdr->Status != STATUS_PENDING)
 551                 return false;
 552
 553         if (!length) {
 554                 spin_lock(&server->req_lock);
 555                 server->credits += le16_to_cpu(hdr->CreditRequest);
 556                 spin_unlock(&server->req_lock);
 557                 wake_up(&server->request_q);
 558         }
 559
 560         return true;
 561 }
 562
 563 static int
 564 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 565                      struct cifsInodeInfo *cinode)
 566 {
 567         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 568                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 569                                         smb2_get_lease_state(cinode));
 570
 571         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 572                                  fid->volatile_fid,
 573                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 574 }
 575
 576 static int
 577 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 578              struct kstatfs *buf)
 579 {
 580         int rc;
 581         __le16 srch_path = 0; /* Null - open root of share */
 582         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 583         struct cifs_open_parms oparms;
 584         struct cifs_fid fid;
 585
 586         oparms.tcon = tcon;
 587         oparms.desired_access = FILE_READ_ATTRIBUTES;
 588         oparms.disposition = FILE_OPEN;
 589         oparms.create_options = 0;
 590         oparms.fid = &fid;
 591         oparms.reconnect = false;
 592
 593         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 594         if (rc)
 595                 return rc;
 596         buf->f_type = SMB2_MAGIC_NUMBER;
 597         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 598                            buf);
 599         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 600         return rc;
 601 }
 602
 603 static bool
 604 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 605 {
 606         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 607                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 608 }
 609
 610 static int
 611 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 612                __u64 length, __u32 type, int lock, int unlock, bool wait)
 613 {
 614         if (unlock && !lock)
 615                 type = SMB2_LOCKFLAG_UNLOCK;
 616         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 617                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 618                          current->tgid, length, offset, type, wait);
 619 }
 620
 621 static void
 622 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 623 {
 624         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 625 }
 626
 627 static void
 628 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 629 {
 630         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 631 }
 632
 633 static void
 634 smb2_new_lease_key(struct cifs_fid *fid)
 635 {
 636         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 637 }
 638
 639 static int
 640 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 641                    const char *full_path, char **target_path,
 642                    struct cifs_sb_info *cifs_sb)
 643 {
 644         int rc;
 645         __le16 *utf16_path;
 646         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 647         struct cifs_open_parms oparms;
 648         struct cifs_fid fid;
 649         struct smb2_err_rsp *err_buf = NULL;
 650         struct smb2_symlink_err_rsp *symlink;
 651         unsigned int sub_len, sub_offset;
 652
 653         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 654
 655         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 656         if (!utf16_path)
 657                 return -ENOMEM;
 658
 659         oparms.tcon = tcon;
 660         oparms.desired_access = FILE_READ_ATTRIBUTES;
 661         oparms.disposition = FILE_OPEN;
 662         oparms.create_options = 0;
 663         oparms.fid = &fid;
 664         oparms.reconnect = false;
 665
 666         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 667
 668         if (!rc || !err_buf) {
 669                 kfree(utf16_path);
 670                 return -ENOENT;
 671         }
 672         /* open must fail on symlink - reset rc */
 673         rc = 0;
 674         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 675         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 676         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 677         *target_path = cifs_strndup_from_utf16(
 678                                 (char *)symlink->PathBuffer + sub_offset,
 679                                 sub_len, true, cifs_sb->local_nls);
 680         if (!(*target_path)) {
 681                 kfree(utf16_path);
 682                 return -ENOMEM;
 683         }
 684         convert_delimiter(*target_path, '/');
 685         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 686         kfree(utf16_path);
 687         return rc;
 688 }
 689
 690 static void
 691 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 692                       unsigned int epoch, bool *purge_cache)
 693 {
 694         oplock &= 0xFF;
 695         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 696                 return;
 697         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 698                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 699                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 700                          &cinode->vfs_inode);
 701         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 702                 cinode->oplock = CIFS_CACHE_RW_FLG;
 703                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 704                          &cinode->vfs_inode);
 705         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 706                 cinode->oplock = CIFS_CACHE_READ_FLG;
 707                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 708                          &cinode->vfs_inode);
 709         } else
 710                 cinode->oplock = 0;
 711 }
 712
 713 static void
 714 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 715                        unsigned int epoch, bool *purge_cache)
 716 {
 717         char message[5] = {0};
 718
 719         oplock &= 0xFF;
 720         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 721                 return;
 722
 723         cinode->oplock = 0;
 724         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
 725                 cinode->oplock |= CIFS_CACHE_READ_FLG;
 726                 strcat(message, "R");
 727         }
 728         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
 729                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
 730                 strcat(message, "H");
 731         }
 732         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
 733                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
 734                 strcat(message, "W");
 735         }
 736         if (!cinode->oplock)
 737                 strcat(message, "None");
 738         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 739                  &cinode->vfs_inode);
 740 }
 741
 742 static void
 743 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 744                       unsigned int epoch, bool *purge_cache)
 745 {
 746         unsigned int old_oplock = cinode->oplock;
 747
 748         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
 749
 750         if (purge_cache) {
 751                 *purge_cache = false;
 752                 if (old_oplock == CIFS_CACHE_READ_FLG) {
 753                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
 754                             (epoch - cinode->epoch > 0))
 755                                 *purge_cache = true;
 756                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 757                                  (epoch - cinode->epoch > 1))
 758                                 *purge_cache = true;
 759                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 760                                  (epoch - cinode->epoch > 1))
 761                                 *purge_cache = true;
 762                         else if (cinode->oplock == 0 &&
 763                                  (epoch - cinode->epoch > 0))
 764                                 *purge_cache = true;
 765                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
 766                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 767                             (epoch - cinode->epoch > 0))
 768                                 *purge_cache = true;
 769                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 770                                  (epoch - cinode->epoch > 1))
 771                                 *purge_cache = true;
 772                 }
 773                 cinode->epoch = epoch;
 774         }
 775 }
 776
 777 static bool
 778 smb2_is_read_op(__u32 oplock)
 779 {
 780         return oplock == SMB2_OPLOCK_LEVEL_II;
 781 }
 782
 783 static bool
 784 smb21_is_read_op(__u32 oplock)
 785 {
 786         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
 787                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
 788 }
 789
 790 static __le32
 791 map_oplock_to_lease(u8 oplock)
 792 {
 793         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
 794                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
 795         else if (oplock == SMB2_OPLOCK_LEVEL_II)
 796                 return SMB2_LEASE_READ_CACHING;
 797         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
 798                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
 799                        SMB2_LEASE_WRITE_CACHING;
 800         return 0;
 801 }
 802
 803 static char *
 804 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
 805 {
 806         struct create_lease *buf;
 807
 808         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
 809         if (!buf)
 810                 return NULL;
 811
 812         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 813         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 814         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 815
 816         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 817                                         (struct create_lease, lcontext));
 818         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
 819         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 820                                 (struct create_lease, Name));
 821         buf->ccontext.NameLength = cpu_to_le16(4);
 822         buf->Name[0] = 'R';
 823         buf->Name[1] = 'q';
 824         buf->Name[2] = 'L';
 825         buf->Name[3] = 's';
 826         return (char *)buf;
 827 }
 828
 829 static char *
 830 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
 831 {
 832         struct create_lease_v2 *buf;
 833
 834         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
 835         if (!buf)
 836                 return NULL;
 837
 838         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 839         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 840         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 841
 842         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 843                                         (struct create_lease_v2, lcontext));
 844         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
 845         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 846                                 (struct create_lease_v2, Name));
 847         buf->ccontext.NameLength = cpu_to_le16(4);
 848         buf->Name[0] = 'R';
 849         buf->Name[1] = 'q';
 850         buf->Name[2] = 'L';
 851         buf->Name[3] = 's';
 852         return (char *)buf;
 853 }
 854
 855 static __u8
 856 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
 857 {
 858         struct create_lease *lc = (struct create_lease *)buf;
 859
 860         *epoch = 0; /* not used */
 861         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 862                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 863         return le32_to_cpu(lc->lcontext.LeaseState);
 864 }
 865
 866 static __u8
 867 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
 868 {
 869         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
 870
 871         *epoch = le16_to_cpu(lc->lcontext.Epoch);
 872         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 873                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 874         return le32_to_cpu(lc->lcontext.LeaseState);
 875 }
 876
 877 struct smb_version_operations smb20_operations = {
 878         .compare_fids = smb2_compare_fids,
 879         .setup_request = smb2_setup_request,
 880         .setup_async_request = smb2_setup_async_request,
 881         .check_receive = smb2_check_receive,
 882         .add_credits = smb2_add_credits,
 883         .set_credits = smb2_set_credits,
 884         .get_credits_field = smb2_get_credits_field,
 885         .get_credits = smb2_get_credits,
 886         .get_next_mid = smb2_get_next_mid,
 887         .read_data_offset = smb2_read_data_offset,
 888         .read_data_length = smb2_read_data_length,
 889         .map_error = map_smb2_to_linux_error,
 890         .find_mid = smb2_find_mid,
 891         .check_message = smb2_check_message,
 892         .dump_detail = smb2_dump_detail,
 893         .clear_stats = smb2_clear_stats,
 894         .print_stats = smb2_print_stats,
 895         .is_oplock_break = smb2_is_valid_oplock_break,
 896         .need_neg = smb2_need_neg,
 897         .negotiate = smb2_negotiate,
 898         .negotiate_wsize = smb2_negotiate_wsize,
 899         .negotiate_rsize = smb2_negotiate_rsize,
 900         .sess_setup = SMB2_sess_setup,
 901         .logoff = SMB2_logoff,
 902         .tree_connect = SMB2_tcon,
 903         .tree_disconnect = SMB2_tdis,
 904         .qfs_tcon = smb2_qfs_tcon,
 905         .is_path_accessible = smb2_is_path_accessible,
 906         .can_echo = smb2_can_echo,
 907         .echo = SMB2_echo,
 908         .query_path_info = smb2_query_path_info,
 909         .get_srv_inum = smb2_get_srv_inum,
 910         .query_file_info = smb2_query_file_info,
 911         .set_path_size = smb2_set_path_size,
 912         .set_file_size = smb2_set_file_size,
 913         .set_file_info = smb2_set_file_info,
 914         .set_compression = smb2_set_compression,
 915         .mkdir = smb2_mkdir,
 916         .mkdir_setinfo = smb2_mkdir_setinfo,
 917         .rmdir = smb2_rmdir,
 918         .unlink = smb2_unlink,
 919         .rename = smb2_rename_path,
 920         .create_hardlink = smb2_create_hardlink,
 921         .query_symlink = smb2_query_symlink,
 922         .open = smb2_open_file,
 923         .set_fid = smb2_set_fid,
 924         .close = smb2_close_file,
 925         .flush = smb2_flush_file,
 926         .async_readv = smb2_async_readv,
 927         .async_writev = smb2_async_writev,
 928         .sync_read = smb2_sync_read,
 929         .sync_write = smb2_sync_write,
 930         .query_dir_first = smb2_query_dir_first,
 931         .query_dir_next = smb2_query_dir_next,
 932         .close_dir = smb2_close_dir,
 933         .calc_smb_size = smb2_calc_size,
 934         .is_status_pending = smb2_is_status_pending,
 935         .oplock_response = smb2_oplock_response,
 936         .queryfs = smb2_queryfs,
 937         .mand_lock = smb2_mand_lock,
 938         .mand_unlock_range = smb2_unlock_range,
 939         .push_mand_locks = smb2_push_mandatory_locks,
 940         .get_lease_key = smb2_get_lease_key,
 941         .set_lease_key = smb2_set_lease_key,
 942         .new_lease_key = smb2_new_lease_key,
 943         .calc_signature = smb2_calc_signature,
 944         .is_read_op = smb2_is_read_op,
 945         .set_oplock_level = smb2_set_oplock_level,
 946         .create_lease_buf = smb2_create_lease_buf,
 947         .parse_lease_buf = smb2_parse_lease_buf,
 948 };
 949
 950 struct smb_version_operations smb21_operations = {
 951         .compare_fids = smb2_compare_fids,
 952         .setup_request = smb2_setup_request,
 953         .setup_async_request = smb2_setup_async_request,
 954         .check_receive = smb2_check_receive,
 955         .add_credits = smb2_add_credits,
 956         .set_credits = smb2_set_credits,
 957         .get_credits_field = smb2_get_credits_field,
 958         .get_credits = smb2_get_credits,
 959         .get_next_mid = smb2_get_next_mid,
 960         .read_data_offset = smb2_read_data_offset,
 961         .read_data_length = smb2_read_data_length,
 962         .map_error = map_smb2_to_linux_error,
 963         .find_mid = smb2_find_mid,
 964         .check_message = smb2_check_message,
 965         .dump_detail = smb2_dump_detail,
 966         .clear_stats = smb2_clear_stats,
 967         .print_stats = smb2_print_stats,
 968         .is_oplock_break = smb2_is_valid_oplock_break,
 969         .need_neg = smb2_need_neg,
 970         .negotiate = smb2_negotiate,
 971         .negotiate_wsize = smb2_negotiate_wsize,
 972         .negotiate_rsize = smb2_negotiate_rsize,
 973         .sess_setup = SMB2_sess_setup,
 974         .logoff = SMB2_logoff,
 975         .tree_connect = SMB2_tcon,
 976         .tree_disconnect = SMB2_tdis,
 977         .qfs_tcon = smb2_qfs_tcon,
 978         .is_path_accessible = smb2_is_path_accessible,
 979         .can_echo = smb2_can_echo,
 980         .echo = SMB2_echo,
 981         .query_path_info = smb2_query_path_info,
 982         .get_srv_inum = smb2_get_srv_inum,
 983         .query_file_info = smb2_query_file_info,
 984         .set_path_size = smb2_set_path_size,
 985         .set_file_size = smb2_set_file_size,
 986         .set_file_info = smb2_set_file_info,
 987         .set_compression = smb2_set_compression,
 988         .mkdir = smb2_mkdir,
 989         .mkdir_setinfo = smb2_mkdir_setinfo,
 990         .rmdir = smb2_rmdir,
 991         .unlink = smb2_unlink,
 992         .rename = smb2_rename_path,
 993         .create_hardlink = smb2_create_hardlink,
 994         .query_symlink = smb2_query_symlink,
 995         .open = smb2_open_file,
 996         .set_fid = smb2_set_fid,
 997         .close = smb2_close_file,
 998         .flush = smb2_flush_file,
 999         .async_readv = smb2_async_readv,
1000         .async_writev = smb2_async_writev,
1001         .sync_read = smb2_sync_read,
1002         .sync_write = smb2_sync_write,
1003         .query_dir_first = smb2_query_dir_first,
1004         .query_dir_next = smb2_query_dir_next,
1005         .close_dir = smb2_close_dir,
1006         .calc_smb_size = smb2_calc_size,
1007         .is_status_pending = smb2_is_status_pending,
1008         .oplock_response = smb2_oplock_response,
1009         .queryfs = smb2_queryfs,
1010         .mand_lock = smb2_mand_lock,
1011         .mand_unlock_range = smb2_unlock_range,
1012         .push_mand_locks = smb2_push_mandatory_locks,
1013         .get_lease_key = smb2_get_lease_key,
1014         .set_lease_key = smb2_set_lease_key,
1015         .new_lease_key = smb2_new_lease_key,
1016         .calc_signature = smb2_calc_signature,
1017         .is_read_op = smb21_is_read_op,
1018         .set_oplock_level = smb21_set_oplock_level,
1019         .create_lease_buf = smb2_create_lease_buf,
1020         .parse_lease_buf = smb2_parse_lease_buf,
1021 };
1022
1023 struct smb_version_operations smb30_operations = {
1024         .compare_fids = smb2_compare_fids,
1025         .setup_request = smb2_setup_request,
1026         .setup_async_request = smb2_setup_async_request,
1027         .check_receive = smb2_check_receive,
1028         .add_credits = smb2_add_credits,
1029         .set_credits = smb2_set_credits,
1030         .get_credits_field = smb2_get_credits_field,
1031         .get_credits = smb2_get_credits,
1032         .get_next_mid = smb2_get_next_mid,
1033         .read_data_offset = smb2_read_data_offset,
1034         .read_data_length = smb2_read_data_length,
1035         .map_error = map_smb2_to_linux_error,
1036         .find_mid = smb2_find_mid,
1037         .check_message = smb2_check_message,
1038         .dump_detail = smb2_dump_detail,
1039         .clear_stats = smb2_clear_stats,
1040         .print_stats = smb2_print_stats,
1041         .dump_share_caps = smb2_dump_share_caps,
1042         .is_oplock_break = smb2_is_valid_oplock_break,
1043         .need_neg = smb2_need_neg,
1044         .negotiate = smb2_negotiate,
1045         .negotiate_wsize = smb2_negotiate_wsize,
1046         .negotiate_rsize = smb2_negotiate_rsize,
1047         .sess_setup = SMB2_sess_setup,
1048         .logoff = SMB2_logoff,
1049         .tree_connect = SMB2_tcon,
1050         .tree_disconnect = SMB2_tdis,
1051         .qfs_tcon = smb2_qfs_tcon,
1052         .is_path_accessible = smb2_is_path_accessible,
1053         .can_echo = smb2_can_echo,
1054         .echo = SMB2_echo,
1055         .query_path_info = smb2_query_path_info,
1056         .get_srv_inum = smb2_get_srv_inum,
1057         .query_file_info = smb2_query_file_info,
1058         .set_path_size = smb2_set_path_size,
1059         .set_file_size = smb2_set_file_size,
1060         .set_file_info = smb2_set_file_info,
1061         .set_compression = smb2_set_compression,
1062         .mkdir = smb2_mkdir,
1063         .mkdir_setinfo = smb2_mkdir_setinfo,
1064         .rmdir = smb2_rmdir,
1065         .unlink = smb2_unlink,
1066         .rename = smb2_rename_path,
1067         .create_hardlink = smb2_create_hardlink,
1068         .query_symlink = smb2_query_symlink,
1069         .open = smb2_open_file,
1070         .set_fid = smb2_set_fid,
1071         .close = smb2_close_file,
1072         .flush = smb2_flush_file,
1073         .async_readv = smb2_async_readv,
1074         .async_writev = smb2_async_writev,
1075         .sync_read = smb2_sync_read,
1076         .sync_write = smb2_sync_write,
1077         .query_dir_first = smb2_query_dir_first,
1078         .query_dir_next = smb2_query_dir_next,
1079         .close_dir = smb2_close_dir,
1080         .calc_smb_size = smb2_calc_size,
1081         .is_status_pending = smb2_is_status_pending,
1082         .oplock_response = smb2_oplock_response,
1083         .queryfs = smb2_queryfs,
1084         .mand_lock = smb2_mand_lock,
1085         .mand_unlock_range = smb2_unlock_range,
1086         .push_mand_locks = smb2_push_mandatory_locks,
1087         .get_lease_key = smb2_get_lease_key,
1088         .set_lease_key = smb2_set_lease_key,
1089         .new_lease_key = smb2_new_lease_key,
1090         .generate_signingkey = generate_smb3signingkey,
1091         .calc_signature = smb3_calc_signature,
1092         .is_read_op = smb21_is_read_op,
1093         .set_oplock_level = smb3_set_oplock_level,
1094         .create_lease_buf = smb3_create_lease_buf,
1095         .parse_lease_buf = smb3_parse_lease_buf,
1096 };
1097
1098 struct smb_version_values smb20_values = {
1099         .version_string = SMB20_VERSION_STRING,
1100         .protocol_id = SMB20_PROT_ID,
1101         .req_capabilities = 0, /* MBZ */
1102         .large_lock_type = 0,
1103         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1104         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1105         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1106         .header_size = sizeof(struct smb2_hdr),
1107         .max_header_size = MAX_SMB2_HDR_SIZE,
1108         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1109         .lock_cmd = SMB2_LOCK,
1110         .cap_unix = 0,
1111         .cap_nt_find = SMB2_NT_FIND,
1112         .cap_large_files = SMB2_LARGE_FILES,
1113         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1114         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1115         .create_lease_size = sizeof(struct create_lease),
1116 };
1117
1118 struct smb_version_values smb21_values = {
1119         .version_string = SMB21_VERSION_STRING,
1120         .protocol_id = SMB21_PROT_ID,
1121         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1122         .large_lock_type = 0,
1123         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1124         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1125         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1126         .header_size = sizeof(struct smb2_hdr),
1127         .max_header_size = MAX_SMB2_HDR_SIZE,
1128         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1129         .lock_cmd = SMB2_LOCK,
1130         .cap_unix = 0,
1131         .cap_nt_find = SMB2_NT_FIND,
1132         .cap_large_files = SMB2_LARGE_FILES,
1133         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1134         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1135         .create_lease_size = sizeof(struct create_lease),
1136 };
1137
1138 struct smb_version_values smb30_values = {
1139         .version_string = SMB30_VERSION_STRING,
1140         .protocol_id = SMB30_PROT_ID,
1141         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1142         .large_lock_type = 0,
1143         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1144         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1145         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1146         .header_size = sizeof(struct smb2_hdr),
1147         .max_header_size = MAX_SMB2_HDR_SIZE,
1148         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1149         .lock_cmd = SMB2_LOCK,
1150         .cap_unix = 0,
1151         .cap_nt_find = SMB2_NT_FIND,
1152         .cap_large_files = SMB2_LARGE_FILES,
1153         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1154         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1155         .create_lease_size = sizeof(struct create_lease_v2),
1156 };
1157
1158 struct smb_version_values smb302_values = {
1159         .version_string = SMB302_VERSION_STRING,
1160         .protocol_id = SMB302_PROT_ID,
1161         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1162         .large_lock_type = 0,
1163         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1164         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1165         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1166         .header_size = sizeof(struct smb2_hdr),
1167         .max_header_size = MAX_SMB2_HDR_SIZE,
1168         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1169         .lock_cmd = SMB2_LOCK,
1170         .cap_unix = 0,
1171         .cap_nt_find = SMB2_NT_FIND,
1172         .cap_large_files = SMB2_LARGE_FILES,
1173         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1174         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1175         .create_lease_size = sizeof(struct create_lease_v2),
1176 };