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 #ifdef CONFIG_CIFS_STATS2
 213 static int
 214 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 215 {
 216         int rc;
 217         unsigned int ret_data_len = 0;
 218         struct network_interface_info_ioctl_rsp *out_buf;
 219
 220         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 221                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 222                         NULL /* no data input */, 0 /* no data input */,
 223                         (char **)&out_buf, &ret_data_len);
 224
 225         if ((rc == 0)  && (ret_data_len > 0)) {
 226                 /* Dump info on first interface */
 227                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 228                         le32_to_cpu(out_buf->Capability));
 229                 cifs_dbg(FYI, "Link Speed %lld\n",
 230                         le64_to_cpu(out_buf->LinkSpeed));
 231         } else
 232                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 233
 234         return rc;
 235 }
 236 #endif /* STATS2 */
 237
 238 static void
 239 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 240 {
 241         int rc;
 242         __le16 srch_path = 0; /* Null - open root of share */
 243         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 244         struct cifs_open_parms oparms;
 245         struct cifs_fid fid;
 246
 247         oparms.tcon = tcon;
 248         oparms.desired_access = FILE_READ_ATTRIBUTES;
 249         oparms.disposition = FILE_OPEN;
 250         oparms.create_options = 0;
 251         oparms.fid = &fid;
 252         oparms.reconnect = false;
 253
 254         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 255         if (rc)
 256                 return;
 257
 258 #ifdef CONFIG_CIFS_STATS2
 259         SMB3_request_interfaces(xid, tcon);
 260 #endif /* STATS2 */
 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_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 267                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 268         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 269         return;
 270 }
 271
 272 static void
 273 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 274 {
 275         int rc;
 276         __le16 srch_path = 0; /* Null - open root of share */
 277         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 278         struct cifs_open_parms oparms;
 279         struct cifs_fid fid;
 280
 281         oparms.tcon = tcon;
 282         oparms.desired_access = FILE_READ_ATTRIBUTES;
 283         oparms.disposition = FILE_OPEN;
 284         oparms.create_options = 0;
 285         oparms.fid = &fid;
 286         oparms.reconnect = false;
 287
 288         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 289         if (rc)
 290                 return;
 291
 292         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 293                         FS_ATTRIBUTE_INFORMATION);
 294         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 295                         FS_DEVICE_INFORMATION);
 296         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 297         return;
 298 }
 299
 300 static int
 301 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 302                         struct cifs_sb_info *cifs_sb, const char *full_path)
 303 {
 304         int rc;
 305         __le16 *utf16_path;
 306         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 307         struct cifs_open_parms oparms;
 308         struct cifs_fid fid;
 309
 310         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 311         if (!utf16_path)
 312                 return -ENOMEM;
 313
 314         oparms.tcon = tcon;
 315         oparms.desired_access = FILE_READ_ATTRIBUTES;
 316         oparms.disposition = FILE_OPEN;
 317         oparms.create_options = 0;
 318         oparms.fid = &fid;
 319         oparms.reconnect = false;
 320
 321         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 322         if (rc) {
 323                 kfree(utf16_path);
 324                 return rc;
 325         }
 326
 327         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 328         kfree(utf16_path);
 329         return rc;
 330 }
 331
 332 static int
 333 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 334                   struct cifs_sb_info *cifs_sb, const char *full_path,
 335                   u64 *uniqueid, FILE_ALL_INFO *data)
 336 {
 337         *uniqueid = le64_to_cpu(data->IndexNumber);
 338         return 0;
 339 }
 340
 341 static int
 342 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 343                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 344 {
 345         int rc;
 346         struct smb2_file_all_info *smb2_data;
 347
 348         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 349                             GFP_KERNEL);
 350         if (smb2_data == NULL)
 351                 return -ENOMEM;
 352
 353         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 354                              smb2_data);
 355         if (!rc)
 356                 move_smb2_info_to_cifs(data, smb2_data);
 357         kfree(smb2_data);
 358         return rc;
 359 }
 360
 361 static bool
 362 smb2_can_echo(struct TCP_Server_Info *server)
 363 {
 364         return server->echoes;
 365 }
 366
 367 static void
 368 smb2_clear_stats(struct cifs_tcon *tcon)
 369 {
 370 #ifdef CONFIG_CIFS_STATS
 371         int i;
 372         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 373                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 374                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 375         }
 376 #endif
 377 }
 378
 379 static void
 380 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 381 {
 382         seq_puts(m, "\n\tShare Capabilities:");
 383         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 384                 seq_puts(m, " DFS,");
 385         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 386                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 387         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 388                 seq_puts(m, " SCALEOUT,");
 389         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 390                 seq_puts(m, " CLUSTER,");
 391         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 392                 seq_puts(m, " ASYMMETRIC,");
 393         if (tcon->capabilities == 0)
 394                 seq_puts(m, " None");
 395         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 396                 seq_puts(m, " Aligned,");
 397         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 398                 seq_puts(m, " Partition Aligned,");
 399         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 400                 seq_puts(m, " SSD,");
 401         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 402                 seq_puts(m, " TRIM-support,");
 403
 404         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 405         if (tcon->perf_sector_size)
 406                 seq_printf(m, "\tOptimal sector size: 0x%x",
 407                            tcon->perf_sector_size);
 408 }
 409
 410 static void
 411 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 412 {
 413 #ifdef CONFIG_CIFS_STATS
 414         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 415         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 416         seq_printf(m, "\nNegotiates: %d sent %d failed",
 417                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 418                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 419         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 420                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 421                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 422         seq_printf(m, "\nLogoffs: %d sent %d failed",
 423                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 424                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 425         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 426                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 427                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 428         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 429                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 430                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 431         seq_printf(m, "\nCreates: %d sent %d failed",
 432                    atomic_read(&sent[SMB2_CREATE_HE]),
 433                    atomic_read(&failed[SMB2_CREATE_HE]));
 434         seq_printf(m, "\nCloses: %d sent %d failed",
 435                    atomic_read(&sent[SMB2_CLOSE_HE]),
 436                    atomic_read(&failed[SMB2_CLOSE_HE]));
 437         seq_printf(m, "\nFlushes: %d sent %d failed",
 438                    atomic_read(&sent[SMB2_FLUSH_HE]),
 439                    atomic_read(&failed[SMB2_FLUSH_HE]));
 440         seq_printf(m, "\nReads: %d sent %d failed",
 441                    atomic_read(&sent[SMB2_READ_HE]),
 442                    atomic_read(&failed[SMB2_READ_HE]));
 443         seq_printf(m, "\nWrites: %d sent %d failed",
 444                    atomic_read(&sent[SMB2_WRITE_HE]),
 445                    atomic_read(&failed[SMB2_WRITE_HE]));
 446         seq_printf(m, "\nLocks: %d sent %d failed",
 447                    atomic_read(&sent[SMB2_LOCK_HE]),
 448                    atomic_read(&failed[SMB2_LOCK_HE]));
 449         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 450                    atomic_read(&sent[SMB2_IOCTL_HE]),
 451                    atomic_read(&failed[SMB2_IOCTL_HE]));
 452         seq_printf(m, "\nCancels: %d sent %d failed",
 453                    atomic_read(&sent[SMB2_CANCEL_HE]),
 454                    atomic_read(&failed[SMB2_CANCEL_HE]));
 455         seq_printf(m, "\nEchos: %d sent %d failed",
 456                    atomic_read(&sent[SMB2_ECHO_HE]),
 457                    atomic_read(&failed[SMB2_ECHO_HE]));
 458         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 459                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 460                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 461         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 462                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 463                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 464         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 465                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 466                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 467         seq_printf(m, "\nSetInfos: %d sent %d failed",
 468                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 469                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 470         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 471                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 472                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 473 #endif
 474 }
 475
 476 static void
 477 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 478 {
 479         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 480         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 481
 482         cfile->fid.persistent_fid = fid->persistent_fid;
 483         cfile->fid.volatile_fid = fid->volatile_fid;
 484         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 485                                       &fid->purge_cache);
 486         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 487 }
 488
 489 static void
 490 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 491                 struct cifs_fid *fid)
 492 {
 493         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 494 }
 495
 496 static int
 497 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 498                 struct cifs_fid *fid)
 499 {
 500         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 501 }
 502
 503 static unsigned int
 504 smb2_read_data_offset(char *buf)
 505 {
 506         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 507         return rsp->DataOffset;
 508 }
 509
 510 static unsigned int
 511 smb2_read_data_length(char *buf)
 512 {
 513         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 514         return le32_to_cpu(rsp->DataLength);
 515 }
 516
 517
 518 static int
 519 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 520                struct cifs_io_parms *parms, unsigned int *bytes_read,
 521                char **buf, int *buf_type)
 522 {
 523         parms->persistent_fid = cfile->fid.persistent_fid;
 524         parms->volatile_fid = cfile->fid.volatile_fid;
 525         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 526 }
 527
 528 static int
 529 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 530                 struct cifs_io_parms *parms, unsigned int *written,
 531                 struct kvec *iov, unsigned long nr_segs)
 532 {
 533
 534         parms->persistent_fid = cfile->fid.persistent_fid;
 535         parms->volatile_fid = cfile->fid.volatile_fid;
 536         return SMB2_write(xid, parms, written, iov, nr_segs);
 537 }
 538
 539 static int
 540 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 541                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 542 {
 543         __le64 eof = cpu_to_le64(size);
 544         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 545                             cfile->fid.volatile_fid, cfile->pid, &eof);
 546 }
 547
 548 static int
 549 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 550                    struct cifsFileInfo *cfile)
 551 {
 552         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 553                             cfile->fid.volatile_fid);
 554 }
 555
 556 static int
 557 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 558                      const char *path, struct cifs_sb_info *cifs_sb,
 559                      struct cifs_fid *fid, __u16 search_flags,
 560                      struct cifs_search_info *srch_inf)
 561 {
 562         __le16 *utf16_path;
 563         int rc;
 564         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 565         struct cifs_open_parms oparms;
 566
 567         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 568         if (!utf16_path)
 569                 return -ENOMEM;
 570
 571         oparms.tcon = tcon;
 572         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 573         oparms.disposition = FILE_OPEN;
 574         oparms.create_options = 0;
 575         oparms.fid = fid;
 576         oparms.reconnect = false;
 577
 578         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 579         kfree(utf16_path);
 580         if (rc) {
 581                 cifs_dbg(VFS, "open dir failed\n");
 582                 return rc;
 583         }
 584
 585         srch_inf->entries_in_buffer = 0;
 586         srch_inf->index_of_last_entry = 0;
 587
 588         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 589                                   fid->volatile_fid, 0, srch_inf);
 590         if (rc) {
 591                 cifs_dbg(VFS, "query directory failed\n");
 592                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 593         }
 594         return rc;
 595 }
 596
 597 static int
 598 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 599                     struct cifs_fid *fid, __u16 search_flags,
 600                     struct cifs_search_info *srch_inf)
 601 {
 602         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 603                                     fid->volatile_fid, 0, srch_inf);
 604 }
 605
 606 static int
 607 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 608                struct cifs_fid *fid)
 609 {
 610         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 611 }
 612
 613 /*
 614 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 615 * the number of credits and return true. Otherwise - return false.
 616 */
 617 static bool
 618 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 619 {
 620         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 621
 622         if (hdr->Status != STATUS_PENDING)
 623                 return false;
 624
 625         if (!length) {
 626                 spin_lock(&server->req_lock);
 627                 server->credits += le16_to_cpu(hdr->CreditRequest);
 628                 spin_unlock(&server->req_lock);
 629                 wake_up(&server->request_q);
 630         }
 631
 632         return true;
 633 }
 634
 635 static int
 636 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 637                      struct cifsInodeInfo *cinode)
 638 {
 639         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 640                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 641                                         smb2_get_lease_state(cinode));
 642
 643         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 644                                  fid->volatile_fid,
 645                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 646 }
 647
 648 static int
 649 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 650              struct kstatfs *buf)
 651 {
 652         int rc;
 653         __le16 srch_path = 0; /* Null - open root of share */
 654         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 655         struct cifs_open_parms oparms;
 656         struct cifs_fid fid;
 657
 658         oparms.tcon = tcon;
 659         oparms.desired_access = FILE_READ_ATTRIBUTES;
 660         oparms.disposition = FILE_OPEN;
 661         oparms.create_options = 0;
 662         oparms.fid = &fid;
 663         oparms.reconnect = false;
 664
 665         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 666         if (rc)
 667                 return rc;
 668         buf->f_type = SMB2_MAGIC_NUMBER;
 669         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 670                            buf);
 671         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 672         return rc;
 673 }
 674
 675 static bool
 676 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 677 {
 678         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 679                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 680 }
 681
 682 static int
 683 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 684                __u64 length, __u32 type, int lock, int unlock, bool wait)
 685 {
 686         if (unlock && !lock)
 687                 type = SMB2_LOCKFLAG_UNLOCK;
 688         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 689                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 690                          current->tgid, length, offset, type, wait);
 691 }
 692
 693 static void
 694 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 695 {
 696         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 697 }
 698
 699 static void
 700 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 701 {
 702         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 703 }
 704
 705 static void
 706 smb2_new_lease_key(struct cifs_fid *fid)
 707 {
 708         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 709 }
 710
 711 static int
 712 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 713                    const char *full_path, char **target_path,
 714                    struct cifs_sb_info *cifs_sb)
 715 {
 716         int rc;
 717         __le16 *utf16_path;
 718         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 719         struct cifs_open_parms oparms;
 720         struct cifs_fid fid;
 721         struct smb2_err_rsp *err_buf = NULL;
 722         struct smb2_symlink_err_rsp *symlink;
 723         unsigned int sub_len, sub_offset;
 724
 725         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 726
 727         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 728         if (!utf16_path)
 729                 return -ENOMEM;
 730
 731         oparms.tcon = tcon;
 732         oparms.desired_access = FILE_READ_ATTRIBUTES;
 733         oparms.disposition = FILE_OPEN;
 734         oparms.create_options = 0;
 735         oparms.fid = &fid;
 736         oparms.reconnect = false;
 737
 738         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 739
 740         if (!rc || !err_buf) {
 741                 kfree(utf16_path);
 742                 return -ENOENT;
 743         }
 744         /* open must fail on symlink - reset rc */
 745         rc = 0;
 746         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 747         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 748         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 749         *target_path = cifs_strndup_from_utf16(
 750                                 (char *)symlink->PathBuffer + sub_offset,
 751                                 sub_len, true, cifs_sb->local_nls);
 752         if (!(*target_path)) {
 753                 kfree(utf16_path);
 754                 return -ENOMEM;
 755         }
 756         convert_delimiter(*target_path, '/');
 757         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 758         kfree(utf16_path);
 759         return rc;
 760 }
 761
 762 static void
 763 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 764                       unsigned int epoch, bool *purge_cache)
 765 {
 766         oplock &= 0xFF;
 767         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 768                 return;
 769         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 770                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 771                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 772                          &cinode->vfs_inode);
 773         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 774                 cinode->oplock = CIFS_CACHE_RW_FLG;
 775                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 776                          &cinode->vfs_inode);
 777         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 778                 cinode->oplock = CIFS_CACHE_READ_FLG;
 779                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 780                          &cinode->vfs_inode);
 781         } else
 782                 cinode->oplock = 0;
 783 }
 784
 785 static void
 786 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 787                        unsigned int epoch, bool *purge_cache)
 788 {
 789         char message[5] = {0};
 790
 791         oplock &= 0xFF;
 792         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 793                 return;
 794
 795         cinode->oplock = 0;
 796         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
 797                 cinode->oplock |= CIFS_CACHE_READ_FLG;
 798                 strcat(message, "R");
 799         }
 800         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
 801                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
 802                 strcat(message, "H");
 803         }
 804         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
 805                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
 806                 strcat(message, "W");
 807         }
 808         if (!cinode->oplock)
 809                 strcat(message, "None");
 810         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 811                  &cinode->vfs_inode);
 812 }
 813
 814 static void
 815 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 816                       unsigned int epoch, bool *purge_cache)
 817 {
 818         unsigned int old_oplock = cinode->oplock;
 819
 820         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
 821
 822         if (purge_cache) {
 823                 *purge_cache = false;
 824                 if (old_oplock == CIFS_CACHE_READ_FLG) {
 825                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
 826                             (epoch - cinode->epoch > 0))
 827                                 *purge_cache = true;
 828                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 829                                  (epoch - cinode->epoch > 1))
 830                                 *purge_cache = true;
 831                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 832                                  (epoch - cinode->epoch > 1))
 833                                 *purge_cache = true;
 834                         else if (cinode->oplock == 0 &&
 835                                  (epoch - cinode->epoch > 0))
 836                                 *purge_cache = true;
 837                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
 838                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
 839                             (epoch - cinode->epoch > 0))
 840                                 *purge_cache = true;
 841                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
 842                                  (epoch - cinode->epoch > 1))
 843                                 *purge_cache = true;
 844                 }
 845                 cinode->epoch = epoch;
 846         }
 847 }
 848
 849 static bool
 850 smb2_is_read_op(__u32 oplock)
 851 {
 852         return oplock == SMB2_OPLOCK_LEVEL_II;
 853 }
 854
 855 static bool
 856 smb21_is_read_op(__u32 oplock)
 857 {
 858         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
 859                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
 860 }
 861
 862 static __le32
 863 map_oplock_to_lease(u8 oplock)
 864 {
 865         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
 866                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
 867         else if (oplock == SMB2_OPLOCK_LEVEL_II)
 868                 return SMB2_LEASE_READ_CACHING;
 869         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
 870                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
 871                        SMB2_LEASE_WRITE_CACHING;
 872         return 0;
 873 }
 874
 875 static char *
 876 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
 877 {
 878         struct create_lease *buf;
 879
 880         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
 881         if (!buf)
 882                 return NULL;
 883
 884         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 885         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 886         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 887
 888         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 889                                         (struct create_lease, lcontext));
 890         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
 891         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 892                                 (struct create_lease, Name));
 893         buf->ccontext.NameLength = cpu_to_le16(4);
 894         buf->Name[0] = 'R';
 895         buf->Name[1] = 'q';
 896         buf->Name[2] = 'L';
 897         buf->Name[3] = 's';
 898         return (char *)buf;
 899 }
 900
 901 static char *
 902 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
 903 {
 904         struct create_lease_v2 *buf;
 905
 906         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
 907         if (!buf)
 908                 return NULL;
 909
 910         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
 911         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
 912         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
 913
 914         buf->ccontext.DataOffset = cpu_to_le16(offsetof
 915                                         (struct create_lease_v2, lcontext));
 916         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
 917         buf->ccontext.NameOffset = cpu_to_le16(offsetof
 918                                 (struct create_lease_v2, Name));
 919         buf->ccontext.NameLength = cpu_to_le16(4);
 920         buf->Name[0] = 'R';
 921         buf->Name[1] = 'q';
 922         buf->Name[2] = 'L';
 923         buf->Name[3] = 's';
 924         return (char *)buf;
 925 }
 926
 927 static __u8
 928 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
 929 {
 930         struct create_lease *lc = (struct create_lease *)buf;
 931
 932         *epoch = 0; /* not used */
 933         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 934                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 935         return le32_to_cpu(lc->lcontext.LeaseState);
 936 }
 937
 938 static __u8
 939 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
 940 {
 941         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
 942
 943         *epoch = le16_to_cpu(lc->lcontext.Epoch);
 944         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
 945                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
 946         return le32_to_cpu(lc->lcontext.LeaseState);
 947 }
 948
 949 struct smb_version_operations smb20_operations = {
 950         .compare_fids = smb2_compare_fids,
 951         .setup_request = smb2_setup_request,
 952         .setup_async_request = smb2_setup_async_request,
 953         .check_receive = smb2_check_receive,
 954         .add_credits = smb2_add_credits,
 955         .set_credits = smb2_set_credits,
 956         .get_credits_field = smb2_get_credits_field,
 957         .get_credits = smb2_get_credits,
 958         .get_next_mid = smb2_get_next_mid,
 959         .read_data_offset = smb2_read_data_offset,
 960         .read_data_length = smb2_read_data_length,
 961         .map_error = map_smb2_to_linux_error,
 962         .find_mid = smb2_find_mid,
 963         .check_message = smb2_check_message,
 964         .dump_detail = smb2_dump_detail,
 965         .clear_stats = smb2_clear_stats,
 966         .print_stats = smb2_print_stats,
 967         .is_oplock_break = smb2_is_valid_oplock_break,
 968         .need_neg = smb2_need_neg,
 969         .negotiate = smb2_negotiate,
 970         .negotiate_wsize = smb2_negotiate_wsize,
 971         .negotiate_rsize = smb2_negotiate_rsize,
 972         .sess_setup = SMB2_sess_setup,
 973         .logoff = SMB2_logoff,
 974         .tree_connect = SMB2_tcon,
 975         .tree_disconnect = SMB2_tdis,
 976         .qfs_tcon = smb2_qfs_tcon,
 977         .is_path_accessible = smb2_is_path_accessible,
 978         .can_echo = smb2_can_echo,
 979         .echo = SMB2_echo,
 980         .query_path_info = smb2_query_path_info,
 981         .get_srv_inum = smb2_get_srv_inum,
 982         .query_file_info = smb2_query_file_info,
 983         .set_path_size = smb2_set_path_size,
 984         .set_file_size = smb2_set_file_size,
 985         .set_file_info = smb2_set_file_info,
 986         .set_compression = smb2_set_compression,
 987         .mkdir = smb2_mkdir,
 988         .mkdir_setinfo = smb2_mkdir_setinfo,
 989         .rmdir = smb2_rmdir,
 990         .unlink = smb2_unlink,
 991         .rename = smb2_rename_path,
 992         .create_hardlink = smb2_create_hardlink,
 993         .query_symlink = smb2_query_symlink,
 994         .open = smb2_open_file,
 995         .set_fid = smb2_set_fid,
 996         .close = smb2_close_file,
 997         .flush = smb2_flush_file,
 998         .async_readv = smb2_async_readv,
 999         .async_writev = smb2_async_writev,
1000         .sync_read = smb2_sync_read,
1001         .sync_write = smb2_sync_write,
1002         .query_dir_first = smb2_query_dir_first,
1003         .query_dir_next = smb2_query_dir_next,
1004         .close_dir = smb2_close_dir,
1005         .calc_smb_size = smb2_calc_size,
1006         .is_status_pending = smb2_is_status_pending,
1007         .oplock_response = smb2_oplock_response,
1008         .queryfs = smb2_queryfs,
1009         .mand_lock = smb2_mand_lock,
1010         .mand_unlock_range = smb2_unlock_range,
1011         .push_mand_locks = smb2_push_mandatory_locks,
1012         .get_lease_key = smb2_get_lease_key,
1013         .set_lease_key = smb2_set_lease_key,
1014         .new_lease_key = smb2_new_lease_key,
1015         .calc_signature = smb2_calc_signature,
1016         .is_read_op = smb2_is_read_op,
1017         .set_oplock_level = smb2_set_oplock_level,
1018         .create_lease_buf = smb2_create_lease_buf,
1019         .parse_lease_buf = smb2_parse_lease_buf,
1020 };
1021
1022 struct smb_version_operations smb21_operations = {
1023         .compare_fids = smb2_compare_fids,
1024         .setup_request = smb2_setup_request,
1025         .setup_async_request = smb2_setup_async_request,
1026         .check_receive = smb2_check_receive,
1027         .add_credits = smb2_add_credits,
1028         .set_credits = smb2_set_credits,
1029         .get_credits_field = smb2_get_credits_field,
1030         .get_credits = smb2_get_credits,
1031         .get_next_mid = smb2_get_next_mid,
1032         .read_data_offset = smb2_read_data_offset,
1033         .read_data_length = smb2_read_data_length,
1034         .map_error = map_smb2_to_linux_error,
1035         .find_mid = smb2_find_mid,
1036         .check_message = smb2_check_message,
1037         .dump_detail = smb2_dump_detail,
1038         .clear_stats = smb2_clear_stats,
1039         .print_stats = smb2_print_stats,
1040         .is_oplock_break = smb2_is_valid_oplock_break,
1041         .need_neg = smb2_need_neg,
1042         .negotiate = smb2_negotiate,
1043         .negotiate_wsize = smb2_negotiate_wsize,
1044         .negotiate_rsize = smb2_negotiate_rsize,
1045         .sess_setup = SMB2_sess_setup,
1046         .logoff = SMB2_logoff,
1047         .tree_connect = SMB2_tcon,
1048         .tree_disconnect = SMB2_tdis,
1049         .qfs_tcon = smb2_qfs_tcon,
1050         .is_path_accessible = smb2_is_path_accessible,
1051         .can_echo = smb2_can_echo,
1052         .echo = SMB2_echo,
1053         .query_path_info = smb2_query_path_info,
1054         .get_srv_inum = smb2_get_srv_inum,
1055         .query_file_info = smb2_query_file_info,
1056         .set_path_size = smb2_set_path_size,
1057         .set_file_size = smb2_set_file_size,
1058         .set_file_info = smb2_set_file_info,
1059         .set_compression = smb2_set_compression,
1060         .mkdir = smb2_mkdir,
1061         .mkdir_setinfo = smb2_mkdir_setinfo,
1062         .rmdir = smb2_rmdir,
1063         .unlink = smb2_unlink,
1064         .rename = smb2_rename_path,
1065         .create_hardlink = smb2_create_hardlink,
1066         .query_symlink = smb2_query_symlink,
1067         .open = smb2_open_file,
1068         .set_fid = smb2_set_fid,
1069         .close = smb2_close_file,
1070         .flush = smb2_flush_file,
1071         .async_readv = smb2_async_readv,
1072         .async_writev = smb2_async_writev,
1073         .sync_read = smb2_sync_read,
1074         .sync_write = smb2_sync_write,
1075         .query_dir_first = smb2_query_dir_first,
1076         .query_dir_next = smb2_query_dir_next,
1077         .close_dir = smb2_close_dir,
1078         .calc_smb_size = smb2_calc_size,
1079         .is_status_pending = smb2_is_status_pending,
1080         .oplock_response = smb2_oplock_response,
1081         .queryfs = smb2_queryfs,
1082         .mand_lock = smb2_mand_lock,
1083         .mand_unlock_range = smb2_unlock_range,
1084         .push_mand_locks = smb2_push_mandatory_locks,
1085         .get_lease_key = smb2_get_lease_key,
1086         .set_lease_key = smb2_set_lease_key,
1087         .new_lease_key = smb2_new_lease_key,
1088         .calc_signature = smb2_calc_signature,
1089         .is_read_op = smb21_is_read_op,
1090         .set_oplock_level = smb21_set_oplock_level,
1091         .create_lease_buf = smb2_create_lease_buf,
1092         .parse_lease_buf = smb2_parse_lease_buf,
1093 };
1094
1095 struct smb_version_operations smb30_operations = {
1096         .compare_fids = smb2_compare_fids,
1097         .setup_request = smb2_setup_request,
1098         .setup_async_request = smb2_setup_async_request,
1099         .check_receive = smb2_check_receive,
1100         .add_credits = smb2_add_credits,
1101         .set_credits = smb2_set_credits,
1102         .get_credits_field = smb2_get_credits_field,
1103         .get_credits = smb2_get_credits,
1104         .get_next_mid = smb2_get_next_mid,
1105         .read_data_offset = smb2_read_data_offset,
1106         .read_data_length = smb2_read_data_length,
1107         .map_error = map_smb2_to_linux_error,
1108         .find_mid = smb2_find_mid,
1109         .check_message = smb2_check_message,
1110         .dump_detail = smb2_dump_detail,
1111         .clear_stats = smb2_clear_stats,
1112         .print_stats = smb2_print_stats,
1113         .dump_share_caps = smb2_dump_share_caps,
1114         .is_oplock_break = smb2_is_valid_oplock_break,
1115         .need_neg = smb2_need_neg,
1116         .negotiate = smb2_negotiate,
1117         .negotiate_wsize = smb2_negotiate_wsize,
1118         .negotiate_rsize = smb2_negotiate_rsize,
1119         .sess_setup = SMB2_sess_setup,
1120         .logoff = SMB2_logoff,
1121         .tree_connect = SMB2_tcon,
1122         .tree_disconnect = SMB2_tdis,
1123         .qfs_tcon = smb3_qfs_tcon,
1124         .is_path_accessible = smb2_is_path_accessible,
1125         .can_echo = smb2_can_echo,
1126         .echo = SMB2_echo,
1127         .query_path_info = smb2_query_path_info,
1128         .get_srv_inum = smb2_get_srv_inum,
1129         .query_file_info = smb2_query_file_info,
1130         .set_path_size = smb2_set_path_size,
1131         .set_file_size = smb2_set_file_size,
1132         .set_file_info = smb2_set_file_info,
1133         .set_compression = smb2_set_compression,
1134         .mkdir = smb2_mkdir,
1135         .mkdir_setinfo = smb2_mkdir_setinfo,
1136         .rmdir = smb2_rmdir,
1137         .unlink = smb2_unlink,
1138         .rename = smb2_rename_path,
1139         .create_hardlink = smb2_create_hardlink,
1140         .query_symlink = smb2_query_symlink,
1141         .open = smb2_open_file,
1142         .set_fid = smb2_set_fid,
1143         .close = smb2_close_file,
1144         .flush = smb2_flush_file,
1145         .async_readv = smb2_async_readv,
1146         .async_writev = smb2_async_writev,
1147         .sync_read = smb2_sync_read,
1148         .sync_write = smb2_sync_write,
1149         .query_dir_first = smb2_query_dir_first,
1150         .query_dir_next = smb2_query_dir_next,
1151         .close_dir = smb2_close_dir,
1152         .calc_smb_size = smb2_calc_size,
1153         .is_status_pending = smb2_is_status_pending,
1154         .oplock_response = smb2_oplock_response,
1155         .queryfs = smb2_queryfs,
1156         .mand_lock = smb2_mand_lock,
1157         .mand_unlock_range = smb2_unlock_range,
1158         .push_mand_locks = smb2_push_mandatory_locks,
1159         .get_lease_key = smb2_get_lease_key,
1160         .set_lease_key = smb2_set_lease_key,
1161         .new_lease_key = smb2_new_lease_key,
1162         .generate_signingkey = generate_smb3signingkey,
1163         .calc_signature = smb3_calc_signature,
1164         .is_read_op = smb21_is_read_op,
1165         .set_oplock_level = smb3_set_oplock_level,
1166         .create_lease_buf = smb3_create_lease_buf,
1167         .parse_lease_buf = smb3_parse_lease_buf,
1168 };
1169
1170 struct smb_version_values smb20_values = {
1171         .version_string = SMB20_VERSION_STRING,
1172         .protocol_id = SMB20_PROT_ID,
1173         .req_capabilities = 0, /* MBZ */
1174         .large_lock_type = 0,
1175         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1176         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1177         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1178         .header_size = sizeof(struct smb2_hdr),
1179         .max_header_size = MAX_SMB2_HDR_SIZE,
1180         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1181         .lock_cmd = SMB2_LOCK,
1182         .cap_unix = 0,
1183         .cap_nt_find = SMB2_NT_FIND,
1184         .cap_large_files = SMB2_LARGE_FILES,
1185         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1186         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1187         .create_lease_size = sizeof(struct create_lease),
1188 };
1189
1190 struct smb_version_values smb21_values = {
1191         .version_string = SMB21_VERSION_STRING,
1192         .protocol_id = SMB21_PROT_ID,
1193         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1194         .large_lock_type = 0,
1195         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1196         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1197         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1198         .header_size = sizeof(struct smb2_hdr),
1199         .max_header_size = MAX_SMB2_HDR_SIZE,
1200         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1201         .lock_cmd = SMB2_LOCK,
1202         .cap_unix = 0,
1203         .cap_nt_find = SMB2_NT_FIND,
1204         .cap_large_files = SMB2_LARGE_FILES,
1205         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1206         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1207         .create_lease_size = sizeof(struct create_lease),
1208 };
1209
1210 struct smb_version_values smb30_values = {
1211         .version_string = SMB30_VERSION_STRING,
1212         .protocol_id = SMB30_PROT_ID,
1213         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1214         .large_lock_type = 0,
1215         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1216         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1217         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1218         .header_size = sizeof(struct smb2_hdr),
1219         .max_header_size = MAX_SMB2_HDR_SIZE,
1220         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1221         .lock_cmd = SMB2_LOCK,
1222         .cap_unix = 0,
1223         .cap_nt_find = SMB2_NT_FIND,
1224         .cap_large_files = SMB2_LARGE_FILES,
1225         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1226         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1227         .create_lease_size = sizeof(struct create_lease_v2),
1228 };
1229
1230 struct smb_version_values smb302_values = {
1231         .version_string = SMB302_VERSION_STRING,
1232         .protocol_id = SMB302_PROT_ID,
1233         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1234         .large_lock_type = 0,
1235         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1236         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1237         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1238         .header_size = sizeof(struct smb2_hdr),
1239         .max_header_size = MAX_SMB2_HDR_SIZE,
1240         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1241         .lock_cmd = SMB2_LOCK,
1242         .cap_unix = 0,
1243         .cap_nt_find = SMB2_NT_FIND,
1244         .cap_large_files = SMB2_LARGE_FILES,
1245         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1246         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1247         .create_lease_size = sizeof(struct create_lease_v2),
1248 };