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 "smb2status.h"
  28 #include "smb2glob.h"
  29
  30 static int
  31 change_conf(struct TCP_Server_Info *server)
  32 {
  33         server->credits += server->echo_credits + server->oplock_credits;
  34         server->oplock_credits = server->echo_credits = 0;
  35         switch (server->credits) {
  36         case 0:
  37                 return -1;
  38         case 1:
  39                 server->echoes = false;
  40                 server->oplocks = false;
  41                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  42                 break;
  43         case 2:
  44                 server->echoes = true;
  45                 server->oplocks = false;
  46                 server->echo_credits = 1;
  47                 cifs_dbg(FYI, "disabling oplocks\n");
  48                 break;
  49         default:
  50                 server->echoes = true;
  51                 server->oplocks = true;
  52                 server->echo_credits = 1;
  53                 server->oplock_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return 0;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  61                  const int optype)
  62 {
  63         int *val, rc = 0;
  64         spin_lock(&server->req_lock);
  65         val = server->ops->get_credits_field(server, optype);
  66         *val += add;
  67         server->in_flight--;
  68         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  69                 rc = change_conf(server);
  70         /*
  71          * Sometimes server returns 0 credits on oplock break ack - we need to
  72          * rebalance credits in this case.
  73          */
  74         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  75                  server->oplocks) {
  76                 if (server->credits > 1) {
  77                         server->credits--;
  78                         server->oplock_credits++;
  79                 }
  80         }
  81         spin_unlock(&server->req_lock);
  82         wake_up(&server->request_q);
  83         if (rc)
  84                 cifs_reconnect(server);
  85 }
  86
  87 static void
  88 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  89 {
  90         spin_lock(&server->req_lock);
  91         server->credits = val;
  92         spin_unlock(&server->req_lock);
  93 }
  94
  95 static int *
  96 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  97 {
  98         switch (optype) {
  99         case CIFS_ECHO_OP:
 100                 return &server->echo_credits;
 101         case CIFS_OBREAK_OP:
 102                 return &server->oplock_credits;
 103         default:
 104                 return &server->credits;
 105         }
 106 }
 107
 108 static unsigned int
 109 smb2_get_credits(struct mid_q_entry *mid)
 110 {
 111         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 112 }
 113
 114 static __u64
 115 smb2_get_next_mid(struct TCP_Server_Info *server)
 116 {
 117         __u64 mid;
 118         /* for SMB2 we need the current value */
 119         spin_lock(&GlobalMid_Lock);
 120         mid = server->CurrentMid++;
 121         spin_unlock(&GlobalMid_Lock);
 122         return mid;
 123 }
 124
 125 static struct mid_q_entry *
 126 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 127 {
 128         struct mid_q_entry *mid;
 129         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 130
 131         spin_lock(&GlobalMid_Lock);
 132         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 133                 if ((mid->mid == hdr->MessageId) &&
 134                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 135                     (mid->command == hdr->Command)) {
 136                         spin_unlock(&GlobalMid_Lock);
 137                         return mid;
 138                 }
 139         }
 140         spin_unlock(&GlobalMid_Lock);
 141         return NULL;
 142 }
 143
 144 static void
 145 smb2_dump_detail(void *buf)
 146 {
 147 #ifdef CONFIG_CIFS_DEBUG2
 148         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 149
 150         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 151                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 152                  smb->ProcessId);
 153         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 154 #endif
 155 }
 156
 157 static bool
 158 smb2_need_neg(struct TCP_Server_Info *server)
 159 {
 160         return server->max_read == 0;
 161 }
 162
 163 static int
 164 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 165 {
 166         int rc;
 167         ses->server->CurrentMid = 0;
 168         rc = SMB2_negotiate(xid, ses);
 169         /* BB we probably don't need to retry with modern servers */
 170         if (rc == -EAGAIN)
 171                 rc = -EHOSTDOWN;
 172         return rc;
 173 }
 174
 175 static unsigned int
 176 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 177 {
 178         struct TCP_Server_Info *server = tcon->ses->server;
 179         unsigned int wsize;
 180
 181         /* start with specified wsize, or default */
 182         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 183         wsize = min_t(unsigned int, wsize, server->max_write);
 184         /*
 185          * limit write size to 2 ** 16, because we don't support multicredit
 186          * requests now.
 187          */
 188         wsize = min_t(unsigned int, wsize, 2 << 15);
 189
 190         return wsize;
 191 }
 192
 193 static unsigned int
 194 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 195 {
 196         struct TCP_Server_Info *server = tcon->ses->server;
 197         unsigned int rsize;
 198
 199         /* start with specified rsize, or default */
 200         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 201         rsize = min_t(unsigned int, rsize, server->max_read);
 202         /*
 203          * limit write size to 2 ** 16, because we don't support multicredit
 204          * requests now.
 205          */
 206         rsize = min_t(unsigned int, rsize, 2 << 15);
 207
 208         return rsize;
 209 }
 210
 211 static int
 212 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 213                         struct cifs_sb_info *cifs_sb, const char *full_path)
 214 {
 215         int rc;
 216         __le16 *utf16_path;
 217         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 218         struct cifs_open_parms oparms;
 219         struct cifs_fid fid;
 220
 221         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 222         if (!utf16_path)
 223                 return -ENOMEM;
 224
 225         oparms.tcon = tcon;
 226         oparms.desired_access = FILE_READ_ATTRIBUTES;
 227         oparms.disposition = FILE_OPEN;
 228         oparms.create_options = 0;
 229         oparms.fid = &fid;
 230         oparms.reconnect = false;
 231
 232         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL);
 233         if (rc) {
 234                 kfree(utf16_path);
 235                 return rc;
 236         }
 237
 238         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 239         kfree(utf16_path);
 240         return rc;
 241 }
 242
 243 static int
 244 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 245                   struct cifs_sb_info *cifs_sb, const char *full_path,
 246                   u64 *uniqueid, FILE_ALL_INFO *data)
 247 {
 248         *uniqueid = le64_to_cpu(data->IndexNumber);
 249         return 0;
 250 }
 251
 252 static int
 253 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 254                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 255 {
 256         int rc;
 257         struct smb2_file_all_info *smb2_data;
 258
 259         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 260                             GFP_KERNEL);
 261         if (smb2_data == NULL)
 262                 return -ENOMEM;
 263
 264         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 265                              smb2_data);
 266         if (!rc)
 267                 move_smb2_info_to_cifs(data, smb2_data);
 268         kfree(smb2_data);
 269         return rc;
 270 }
 271
 272 static bool
 273 smb2_can_echo(struct TCP_Server_Info *server)
 274 {
 275         return server->echoes;
 276 }
 277
 278 static void
 279 smb2_clear_stats(struct cifs_tcon *tcon)
 280 {
 281 #ifdef CONFIG_CIFS_STATS
 282         int i;
 283         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 284                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 285                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 286         }
 287 #endif
 288 }
 289
 290 static void
 291 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 292 {
 293         seq_puts(m, "\n\tShare Capabilities:");
 294         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 295                 seq_puts(m, " DFS,");
 296         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 297                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 298         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 299                 seq_puts(m, " SCALEOUT,");
 300         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 301                 seq_puts(m, " CLUSTER,");
 302         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 303                 seq_puts(m, " ASYMMETRIC,");
 304         if (tcon->capabilities == 0)
 305                 seq_puts(m, " None");
 306         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 307 }
 308
 309 static void
 310 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 311 {
 312 #ifdef CONFIG_CIFS_STATS
 313         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 314         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 315         seq_printf(m, "\nNegotiates: %d sent %d failed",
 316                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 317                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 318         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 319                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 320                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 321         seq_printf(m, "\nLogoffs: %d sent %d failed",
 322                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 323                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 324         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 325                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 326                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 327         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 328                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 329                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 330         seq_printf(m, "\nCreates: %d sent %d failed",
 331                    atomic_read(&sent[SMB2_CREATE_HE]),
 332                    atomic_read(&failed[SMB2_CREATE_HE]));
 333         seq_printf(m, "\nCloses: %d sent %d failed",
 334                    atomic_read(&sent[SMB2_CLOSE_HE]),
 335                    atomic_read(&failed[SMB2_CLOSE_HE]));
 336         seq_printf(m, "\nFlushes: %d sent %d failed",
 337                    atomic_read(&sent[SMB2_FLUSH_HE]),
 338                    atomic_read(&failed[SMB2_FLUSH_HE]));
 339         seq_printf(m, "\nReads: %d sent %d failed",
 340                    atomic_read(&sent[SMB2_READ_HE]),
 341                    atomic_read(&failed[SMB2_READ_HE]));
 342         seq_printf(m, "\nWrites: %d sent %d failed",
 343                    atomic_read(&sent[SMB2_WRITE_HE]),
 344                    atomic_read(&failed[SMB2_WRITE_HE]));
 345         seq_printf(m, "\nLocks: %d sent %d failed",
 346                    atomic_read(&sent[SMB2_LOCK_HE]),
 347                    atomic_read(&failed[SMB2_LOCK_HE]));
 348         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 349                    atomic_read(&sent[SMB2_IOCTL_HE]),
 350                    atomic_read(&failed[SMB2_IOCTL_HE]));
 351         seq_printf(m, "\nCancels: %d sent %d failed",
 352                    atomic_read(&sent[SMB2_CANCEL_HE]),
 353                    atomic_read(&failed[SMB2_CANCEL_HE]));
 354         seq_printf(m, "\nEchos: %d sent %d failed",
 355                    atomic_read(&sent[SMB2_ECHO_HE]),
 356                    atomic_read(&failed[SMB2_ECHO_HE]));
 357         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 358                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 359                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 360         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 361                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 362                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 363         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 364                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 365                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 366         seq_printf(m, "\nSetInfos: %d sent %d failed",
 367                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 368                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 369         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 370                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 371                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 372 #endif
 373 }
 374
 375 static void
 376 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 377 {
 378         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 379         cfile->fid.persistent_fid = fid->persistent_fid;
 380         cfile->fid.volatile_fid = fid->volatile_fid;
 381         smb2_set_oplock_level(cinode, oplock);
 382         cinode->can_cache_brlcks = cinode->clientCanCacheAll;
 383 }
 384
 385 static void
 386 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 387                 struct cifs_fid *fid)
 388 {
 389         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 390 }
 391
 392 static int
 393 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 394                 struct cifs_fid *fid)
 395 {
 396         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 397 }
 398
 399 static unsigned int
 400 smb2_read_data_offset(char *buf)
 401 {
 402         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 403         return rsp->DataOffset;
 404 }
 405
 406 static unsigned int
 407 smb2_read_data_length(char *buf)
 408 {
 409         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 410         return le32_to_cpu(rsp->DataLength);
 411 }
 412
 413
 414 static int
 415 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 416                struct cifs_io_parms *parms, unsigned int *bytes_read,
 417                char **buf, int *buf_type)
 418 {
 419         parms->persistent_fid = cfile->fid.persistent_fid;
 420         parms->volatile_fid = cfile->fid.volatile_fid;
 421         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 422 }
 423
 424 static int
 425 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 426                 struct cifs_io_parms *parms, unsigned int *written,
 427                 struct kvec *iov, unsigned long nr_segs)
 428 {
 429
 430         parms->persistent_fid = cfile->fid.persistent_fid;
 431         parms->volatile_fid = cfile->fid.volatile_fid;
 432         return SMB2_write(xid, parms, written, iov, nr_segs);
 433 }
 434
 435 static int
 436 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 437                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 438 {
 439         __le64 eof = cpu_to_le64(size);
 440         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 441                             cfile->fid.volatile_fid, cfile->pid, &eof);
 442 }
 443
 444 static int
 445 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 446                      const char *path, struct cifs_sb_info *cifs_sb,
 447                      struct cifs_fid *fid, __u16 search_flags,
 448                      struct cifs_search_info *srch_inf)
 449 {
 450         __le16 *utf16_path;
 451         int rc;
 452         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 453         struct cifs_open_parms oparms;
 454
 455         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 456         if (!utf16_path)
 457                 return -ENOMEM;
 458
 459         oparms.tcon = tcon;
 460         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 461         oparms.disposition = FILE_OPEN;
 462         oparms.create_options = 0;
 463         oparms.fid = fid;
 464         oparms.reconnect = false;
 465
 466         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL);
 467         kfree(utf16_path);
 468         if (rc) {
 469                 cifs_dbg(VFS, "open dir failed\n");
 470                 return rc;
 471         }
 472
 473         srch_inf->entries_in_buffer = 0;
 474         srch_inf->index_of_last_entry = 0;
 475
 476         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 477                                   fid->volatile_fid, 0, srch_inf);
 478         if (rc) {
 479                 cifs_dbg(VFS, "query directory failed\n");
 480                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 481         }
 482         return rc;
 483 }
 484
 485 static int
 486 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 487                     struct cifs_fid *fid, __u16 search_flags,
 488                     struct cifs_search_info *srch_inf)
 489 {
 490         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 491                                     fid->volatile_fid, 0, srch_inf);
 492 }
 493
 494 static int
 495 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 496                struct cifs_fid *fid)
 497 {
 498         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 499 }
 500
 501 /*
 502 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 503 * the number of credits and return true. Otherwise - return false.
 504 */
 505 static bool
 506 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 507 {
 508         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 509
 510         if (hdr->Status != STATUS_PENDING)
 511                 return false;
 512
 513         if (!length) {
 514                 spin_lock(&server->req_lock);
 515                 server->credits += le16_to_cpu(hdr->CreditRequest);
 516                 spin_unlock(&server->req_lock);
 517                 wake_up(&server->request_q);
 518         }
 519
 520         return true;
 521 }
 522
 523 static int
 524 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 525                      struct cifsInodeInfo *cinode)
 526 {
 527         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 528                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 529                                         smb2_get_lease_state(cinode));
 530
 531         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 532                                  fid->volatile_fid,
 533                                  cinode->clientCanCacheRead ? 1 : 0);
 534 }
 535
 536 static int
 537 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 538              struct kstatfs *buf)
 539 {
 540         int rc;
 541         __le16 srch_path = 0; /* Null - open root of share */
 542         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 543         struct cifs_open_parms oparms;
 544         struct cifs_fid fid;
 545
 546         oparms.tcon = tcon;
 547         oparms.desired_access = FILE_READ_ATTRIBUTES;
 548         oparms.disposition = FILE_OPEN;
 549         oparms.create_options = 0;
 550         oparms.fid = &fid;
 551         oparms.reconnect = false;
 552
 553         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL);
 554         if (rc)
 555                 return rc;
 556         buf->f_type = SMB2_MAGIC_NUMBER;
 557         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 558                            buf);
 559         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 560         return rc;
 561 }
 562
 563 static bool
 564 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 565 {
 566         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 567                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 568 }
 569
 570 static int
 571 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 572                __u64 length, __u32 type, int lock, int unlock, bool wait)
 573 {
 574         if (unlock && !lock)
 575                 type = SMB2_LOCKFLAG_UNLOCK;
 576         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 577                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 578                          current->tgid, length, offset, type, wait);
 579 }
 580
 581 static void
 582 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 583 {
 584         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 585 }
 586
 587 static void
 588 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 589 {
 590         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 591 }
 592
 593 static void
 594 smb2_new_lease_key(struct cifs_fid *fid)
 595 {
 596         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 597 }
 598
 599 struct smb_version_operations smb21_operations = {
 600         .compare_fids = smb2_compare_fids,
 601         .setup_request = smb2_setup_request,
 602         .setup_async_request = smb2_setup_async_request,
 603         .check_receive = smb2_check_receive,
 604         .add_credits = smb2_add_credits,
 605         .set_credits = smb2_set_credits,
 606         .get_credits_field = smb2_get_credits_field,
 607         .get_credits = smb2_get_credits,
 608         .get_next_mid = smb2_get_next_mid,
 609         .read_data_offset = smb2_read_data_offset,
 610         .read_data_length = smb2_read_data_length,
 611         .map_error = map_smb2_to_linux_error,
 612         .find_mid = smb2_find_mid,
 613         .check_message = smb2_check_message,
 614         .dump_detail = smb2_dump_detail,
 615         .clear_stats = smb2_clear_stats,
 616         .print_stats = smb2_print_stats,
 617         .is_oplock_break = smb2_is_valid_oplock_break,
 618         .need_neg = smb2_need_neg,
 619         .negotiate = smb2_negotiate,
 620         .negotiate_wsize = smb2_negotiate_wsize,
 621         .negotiate_rsize = smb2_negotiate_rsize,
 622         .sess_setup = SMB2_sess_setup,
 623         .logoff = SMB2_logoff,
 624         .tree_connect = SMB2_tcon,
 625         .tree_disconnect = SMB2_tdis,
 626         .is_path_accessible = smb2_is_path_accessible,
 627         .can_echo = smb2_can_echo,
 628         .echo = SMB2_echo,
 629         .query_path_info = smb2_query_path_info,
 630         .get_srv_inum = smb2_get_srv_inum,
 631         .query_file_info = smb2_query_file_info,
 632         .set_path_size = smb2_set_path_size,
 633         .set_file_size = smb2_set_file_size,
 634         .set_file_info = smb2_set_file_info,
 635         .mkdir = smb2_mkdir,
 636         .mkdir_setinfo = smb2_mkdir_setinfo,
 637         .rmdir = smb2_rmdir,
 638         .unlink = smb2_unlink,
 639         .rename = smb2_rename_path,
 640         .create_hardlink = smb2_create_hardlink,
 641         .open = smb2_open_file,
 642         .set_fid = smb2_set_fid,
 643         .close = smb2_close_file,
 644         .flush = smb2_flush_file,
 645         .async_readv = smb2_async_readv,
 646         .async_writev = smb2_async_writev,
 647         .sync_read = smb2_sync_read,
 648         .sync_write = smb2_sync_write,
 649         .query_dir_first = smb2_query_dir_first,
 650         .query_dir_next = smb2_query_dir_next,
 651         .close_dir = smb2_close_dir,
 652         .calc_smb_size = smb2_calc_size,
 653         .is_status_pending = smb2_is_status_pending,
 654         .oplock_response = smb2_oplock_response,
 655         .queryfs = smb2_queryfs,
 656         .mand_lock = smb2_mand_lock,
 657         .mand_unlock_range = smb2_unlock_range,
 658         .push_mand_locks = smb2_push_mandatory_locks,
 659         .get_lease_key = smb2_get_lease_key,
 660         .set_lease_key = smb2_set_lease_key,
 661         .new_lease_key = smb2_new_lease_key,
 662         .calc_signature = smb2_calc_signature,
 663 };
 664
 665
 666 struct smb_version_operations smb30_operations = {
 667         .compare_fids = smb2_compare_fids,
 668         .setup_request = smb2_setup_request,
 669         .setup_async_request = smb2_setup_async_request,
 670         .check_receive = smb2_check_receive,
 671         .add_credits = smb2_add_credits,
 672         .set_credits = smb2_set_credits,
 673         .get_credits_field = smb2_get_credits_field,
 674         .get_credits = smb2_get_credits,
 675         .get_next_mid = smb2_get_next_mid,
 676         .read_data_offset = smb2_read_data_offset,
 677         .read_data_length = smb2_read_data_length,
 678         .map_error = map_smb2_to_linux_error,
 679         .find_mid = smb2_find_mid,
 680         .check_message = smb2_check_message,
 681         .dump_detail = smb2_dump_detail,
 682         .clear_stats = smb2_clear_stats,
 683         .print_stats = smb2_print_stats,
 684         .dump_share_caps = smb2_dump_share_caps,
 685         .is_oplock_break = smb2_is_valid_oplock_break,
 686         .need_neg = smb2_need_neg,
 687         .negotiate = smb2_negotiate,
 688         .negotiate_wsize = smb2_negotiate_wsize,
 689         .negotiate_rsize = smb2_negotiate_rsize,
 690         .sess_setup = SMB2_sess_setup,
 691         .logoff = SMB2_logoff,
 692         .tree_connect = SMB2_tcon,
 693         .tree_disconnect = SMB2_tdis,
 694         .is_path_accessible = smb2_is_path_accessible,
 695         .can_echo = smb2_can_echo,
 696         .echo = SMB2_echo,
 697         .query_path_info = smb2_query_path_info,
 698         .get_srv_inum = smb2_get_srv_inum,
 699         .query_file_info = smb2_query_file_info,
 700         .set_path_size = smb2_set_path_size,
 701         .set_file_size = smb2_set_file_size,
 702         .set_file_info = smb2_set_file_info,
 703         .mkdir = smb2_mkdir,
 704         .mkdir_setinfo = smb2_mkdir_setinfo,
 705         .rmdir = smb2_rmdir,
 706         .unlink = smb2_unlink,
 707         .rename = smb2_rename_path,
 708         .create_hardlink = smb2_create_hardlink,
 709         .open = smb2_open_file,
 710         .set_fid = smb2_set_fid,
 711         .close = smb2_close_file,
 712         .flush = smb2_flush_file,
 713         .async_readv = smb2_async_readv,
 714         .async_writev = smb2_async_writev,
 715         .sync_read = smb2_sync_read,
 716         .sync_write = smb2_sync_write,
 717         .query_dir_first = smb2_query_dir_first,
 718         .query_dir_next = smb2_query_dir_next,
 719         .close_dir = smb2_close_dir,
 720         .calc_smb_size = smb2_calc_size,
 721         .is_status_pending = smb2_is_status_pending,
 722         .oplock_response = smb2_oplock_response,
 723         .queryfs = smb2_queryfs,
 724         .mand_lock = smb2_mand_lock,
 725         .mand_unlock_range = smb2_unlock_range,
 726         .push_mand_locks = smb2_push_mandatory_locks,
 727         .get_lease_key = smb2_get_lease_key,
 728         .set_lease_key = smb2_set_lease_key,
 729         .new_lease_key = smb2_new_lease_key,
 730         .generate_signingkey = generate_smb3signingkey,
 731         .calc_signature = smb3_calc_signature,
 732 };
 733
 734 struct smb_version_values smb20_values = {
 735         .version_string = SMB20_VERSION_STRING,
 736         .protocol_id = SMB20_PROT_ID,
 737         .req_capabilities = 0, /* MBZ */
 738         .large_lock_type = 0,
 739         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 740         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 741         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 742         .header_size = sizeof(struct smb2_hdr),
 743         .max_header_size = MAX_SMB2_HDR_SIZE,
 744         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 745         .lock_cmd = SMB2_LOCK,
 746         .cap_unix = 0,
 747         .cap_nt_find = SMB2_NT_FIND,
 748         .cap_large_files = SMB2_LARGE_FILES,
 749         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 750         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
 751         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
 752 };
 753
 754 struct smb_version_values smb21_values = {
 755         .version_string = SMB21_VERSION_STRING,
 756         .protocol_id = SMB21_PROT_ID,
 757         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
 758         .large_lock_type = 0,
 759         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 760         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 761         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 762         .header_size = sizeof(struct smb2_hdr),
 763         .max_header_size = MAX_SMB2_HDR_SIZE,
 764         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 765         .lock_cmd = SMB2_LOCK,
 766         .cap_unix = 0,
 767         .cap_nt_find = SMB2_NT_FIND,
 768         .cap_large_files = SMB2_LARGE_FILES,
 769         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 770         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
 771         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
 772 };
 773
 774 struct smb_version_values smb30_values = {
 775         .version_string = SMB30_VERSION_STRING,
 776         .protocol_id = SMB30_PROT_ID,
 777         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
 778         .large_lock_type = 0,
 779         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 780         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 781         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 782         .header_size = sizeof(struct smb2_hdr),
 783         .max_header_size = MAX_SMB2_HDR_SIZE,
 784         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 785         .lock_cmd = SMB2_LOCK,
 786         .cap_unix = 0,
 787         .cap_nt_find = SMB2_NT_FIND,
 788         .cap_large_files = SMB2_LARGE_FILES,
 789         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 790         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
 791         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
 792 };
 793
 794 struct smb_version_values smb302_values = {
 795         .version_string = SMB302_VERSION_STRING,
 796         .protocol_id = SMB302_PROT_ID,
 797         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
 798         .large_lock_type = 0,
 799         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 800         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 801         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 802         .header_size = sizeof(struct smb2_hdr),
 803         .max_header_size = MAX_SMB2_HDR_SIZE,
 804         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 805         .lock_cmd = SMB2_LOCK,
 806         .cap_unix = 0,
 807         .cap_nt_find = SMB2_NT_FIND,
 808         .cap_large_files = SMB2_LARGE_FILES,
 809         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 810         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
 811         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
 812 };