fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include "cifsglob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cifsproto.h"
  27 #include "cifs_debug.h"
  28 #include "cifs_unicode.h"
  29 #include "smb2status.h"
  30 #include "smb2glob.h"
  31
  32 static int
  33 change_conf(struct TCP_Server_Info *server)
  34 {
  35         server->credits += server->echo_credits + server->oplock_credits;
  36         server->oplock_credits = server->echo_credits = 0;
  37         switch (server->credits) {
  38         case 0:
  39                 return -1;
  40         case 1:
  41                 server->echoes = false;
  42                 server->oplocks = false;
  43                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 cifs_dbg(FYI, "disabling oplocks\n");
  50                 break;
  51         default:
  52                 server->echoes = true;
  53                 server->oplocks = true;
  54                 server->echo_credits = 1;
  55                 server->oplock_credits = 1;
  56         }
  57         server->credits -= server->echo_credits + server->oplock_credits;
  58         return 0;
  59 }
  60
  61 static void
  62 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  63                  const int optype)
  64 {
  65         int *val, rc = 0;
  66         spin_lock(&server->req_lock);
  67         val = server->ops->get_credits_field(server, optype);
  68         *val += add;
  69         server->in_flight--;
  70         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  71                 rc = change_conf(server);
  72         /*
  73          * Sometimes server returns 0 credits on oplock break ack - we need to
  74          * rebalance credits in this case.
  75          */
  76         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  77                  server->oplocks) {
  78                 if (server->credits > 1) {
  79                         server->credits--;
  80                         server->oplock_credits++;
  81                 }
  82         }
  83         spin_unlock(&server->req_lock);
  84         wake_up(&server->request_q);
  85         if (rc)
  86                 cifs_reconnect(server);
  87 }
  88
  89 static void
  90 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  91 {
  92         spin_lock(&server->req_lock);
  93         server->credits = val;
  94         spin_unlock(&server->req_lock);
  95 }
  96
  97 static int *
  98 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  99 {
 100         switch (optype) {
 101         case CIFS_ECHO_OP:
 102                 return &server->echo_credits;
 103         case CIFS_OBREAK_OP:
 104                 return &server->oplock_credits;
 105         default:
 106                 return &server->credits;
 107         }
 108 }
 109
 110 static unsigned int
 111 smb2_get_credits(struct mid_q_entry *mid)
 112 {
 113         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 114 }
 115
 116 static int
 117 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 118                       unsigned int *num, unsigned int *credits)
 119 {
 120         int rc = 0;
 121         unsigned int scredits;
 122
 123         spin_lock(&server->req_lock);
 124         while (1) {
 125                 if (server->credits <= 0) {
 126                         spin_unlock(&server->req_lock);
 127                         cifs_num_waiters_inc(server);
 128                         rc = wait_event_killable(server->request_q,
 129                                         has_credits(server, &server->credits));
 130                         cifs_num_waiters_dec(server);
 131                         if (rc)
 132                                 return rc;
 133                         spin_lock(&server->req_lock);
 134                 } else {
 135                         if (server->tcpStatus == CifsExiting) {
 136                                 spin_unlock(&server->req_lock);
 137                                 return -ENOENT;
 138                         }
 139
 140                         scredits = server->credits;
 141                         /* can deadlock with reopen */
 142                         if (scredits == 1) {
 143                                 *num = SMB2_MAX_BUFFER_SIZE;
 144                                 *credits = 0;
 145                                 break;
 146                         }
 147
 148                         /* leave one credit for a possible reopen */
 149                         scredits--;
 150                         *num = min_t(unsigned int, size,
 151                                      scredits * SMB2_MAX_BUFFER_SIZE);
 152
 153                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 154                         server->credits -= *credits;
 155                         server->in_flight++;
 156                         break;
 157                 }
 158         }
 159         spin_unlock(&server->req_lock);
 160         return rc;
 161 }
 162
 163 static __u64
 164 smb2_get_next_mid(struct TCP_Server_Info *server)
 165 {
 166         __u64 mid;
 167         /* for SMB2 we need the current value */
 168         spin_lock(&GlobalMid_Lock);
 169         mid = server->CurrentMid++;
 170         spin_unlock(&GlobalMid_Lock);
 171         return mid;
 172 }
 173
 174 static struct mid_q_entry *
 175 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 176 {
 177         struct mid_q_entry *mid;
 178         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 179
 180         spin_lock(&GlobalMid_Lock);
 181         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 182                 if ((mid->mid == hdr->MessageId) &&
 183                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 184                     (mid->command == hdr->Command)) {
 185                         spin_unlock(&GlobalMid_Lock);
 186                         return mid;
 187                 }
 188         }
 189         spin_unlock(&GlobalMid_Lock);
 190         return NULL;
 191 }
 192
 193 static void
 194 smb2_dump_detail(void *buf)
 195 {
 196 #ifdef CONFIG_CIFS_DEBUG2
 197         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 198
 199         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 200                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 201                  smb->ProcessId);
 202         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 203 #endif
 204 }
 205
 206 static bool
 207 smb2_need_neg(struct TCP_Server_Info *server)
 208 {
 209         return server->max_read == 0;
 210 }
 211
 212 static int
 213 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 214 {
 215         int rc;
 216         ses->server->CurrentMid = 0;
 217         rc = SMB2_negotiate(xid, ses);
 218         /* BB we probably don't need to retry with modern servers */
 219         if (rc == -EAGAIN)
 220                 rc = -EHOSTDOWN;
 221         return rc;
 222 }
 223
 224 static unsigned int
 225 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 226 {
 227         struct TCP_Server_Info *server = tcon->ses->server;
 228         unsigned int wsize;
 229
 230         /* start with specified wsize, or default */
 231         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 232         wsize = min_t(unsigned int, wsize, server->max_write);
 233
 234         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 235                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 236
 237         return wsize;
 238 }
 239
 240 static unsigned int
 241 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 242 {
 243         struct TCP_Server_Info *server = tcon->ses->server;
 244         unsigned int rsize;
 245
 246         /* start with specified rsize, or default */
 247         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 248         rsize = min_t(unsigned int, rsize, server->max_read);
 249
 250         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 251                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 252
 253         return rsize;
 254 }
 255
 256 #ifdef CONFIG_CIFS_STATS2
 257 static int
 258 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 259 {
 260         int rc;
 261         unsigned int ret_data_len = 0;
 262         struct network_interface_info_ioctl_rsp *out_buf;
 263
 264         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 265                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 266                         NULL /* no data input */, 0 /* no data input */,
 267                         (char **)&out_buf, &ret_data_len);
 268
 269         if ((rc == 0)  && (ret_data_len > 0)) {
 270                 /* Dump info on first interface */
 271                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 272                         le32_to_cpu(out_buf->Capability));
 273                 cifs_dbg(FYI, "Link Speed %lld\n",
 274                         le64_to_cpu(out_buf->LinkSpeed));
 275         } else
 276                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 277
 278         return rc;
 279 }
 280 #endif /* STATS2 */
 281
 282 static void
 283 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 284 {
 285         int rc;
 286         __le16 srch_path = 0; /* Null - open root of share */
 287         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 288         struct cifs_open_parms oparms;
 289         struct cifs_fid fid;
 290
 291         oparms.tcon = tcon;
 292         oparms.desired_access = FILE_READ_ATTRIBUTES;
 293         oparms.disposition = FILE_OPEN;
 294         oparms.create_options = 0;
 295         oparms.fid = &fid;
 296         oparms.reconnect = false;
 297
 298         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 299         if (rc)
 300                 return;
 301
 302 #ifdef CONFIG_CIFS_STATS2
 303         SMB3_request_interfaces(xid, tcon);
 304 #endif /* STATS2 */
 305
 306         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 307                         FS_ATTRIBUTE_INFORMATION);
 308         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 309                         FS_DEVICE_INFORMATION);
 310         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 311                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 312         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 313         return;
 314 }
 315
 316 static void
 317 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 318 {
 319         int rc;
 320         __le16 srch_path = 0; /* Null - open root of share */
 321         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 322         struct cifs_open_parms oparms;
 323         struct cifs_fid fid;
 324
 325         oparms.tcon = tcon;
 326         oparms.desired_access = FILE_READ_ATTRIBUTES;
 327         oparms.disposition = FILE_OPEN;
 328         oparms.create_options = 0;
 329         oparms.fid = &fid;
 330         oparms.reconnect = false;
 331
 332         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 333         if (rc)
 334                 return;
 335
 336         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 337                         FS_ATTRIBUTE_INFORMATION);
 338         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 339                         FS_DEVICE_INFORMATION);
 340         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 341         return;
 342 }
 343
 344 static int
 345 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 346                         struct cifs_sb_info *cifs_sb, const char *full_path)
 347 {
 348         int rc;
 349         __le16 *utf16_path;
 350         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 351         struct cifs_open_parms oparms;
 352         struct cifs_fid fid;
 353
 354         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 355         if (!utf16_path)
 356                 return -ENOMEM;
 357
 358         oparms.tcon = tcon;
 359         oparms.desired_access = FILE_READ_ATTRIBUTES;
 360         oparms.disposition = FILE_OPEN;
 361         oparms.create_options = 0;
 362         oparms.fid = &fid;
 363         oparms.reconnect = false;
 364
 365         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 366         if (rc) {
 367                 kfree(utf16_path);
 368                 return rc;
 369         }
 370
 371         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 372         kfree(utf16_path);
 373         return rc;
 374 }
 375
 376 static int
 377 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 378                   struct cifs_sb_info *cifs_sb, const char *full_path,
 379                   u64 *uniqueid, FILE_ALL_INFO *data)
 380 {
 381         *uniqueid = le64_to_cpu(data->IndexNumber);
 382         return 0;
 383 }
 384
 385 static int
 386 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 387                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 388 {
 389         int rc;
 390         struct smb2_file_all_info *smb2_data;
 391
 392         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 393                             GFP_KERNEL);
 394         if (smb2_data == NULL)
 395                 return -ENOMEM;
 396
 397         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 398                              smb2_data);
 399         if (!rc)
 400                 move_smb2_info_to_cifs(data, smb2_data);
 401         kfree(smb2_data);
 402         return rc;
 403 }
 404
 405 static bool
 406 smb2_can_echo(struct TCP_Server_Info *server)
 407 {
 408         return server->echoes;
 409 }
 410
 411 static void
 412 smb2_clear_stats(struct cifs_tcon *tcon)
 413 {
 414 #ifdef CONFIG_CIFS_STATS
 415         int i;
 416         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 417                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 418                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 419         }
 420 #endif
 421 }
 422
 423 static void
 424 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 425 {
 426         seq_puts(m, "\n\tShare Capabilities:");
 427         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 428                 seq_puts(m, " DFS,");
 429         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 430                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 431         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 432                 seq_puts(m, " SCALEOUT,");
 433         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 434                 seq_puts(m, " CLUSTER,");
 435         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 436                 seq_puts(m, " ASYMMETRIC,");
 437         if (tcon->capabilities == 0)
 438                 seq_puts(m, " None");
 439         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 440                 seq_puts(m, " Aligned,");
 441         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 442                 seq_puts(m, " Partition Aligned,");
 443         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 444                 seq_puts(m, " SSD,");
 445         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 446                 seq_puts(m, " TRIM-support,");
 447
 448         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 449         if (tcon->perf_sector_size)
 450                 seq_printf(m, "\tOptimal sector size: 0x%x",
 451                            tcon->perf_sector_size);
 452 }
 453
 454 static void
 455 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 456 {
 457 #ifdef CONFIG_CIFS_STATS
 458         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 459         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 460         seq_printf(m, "\nNegotiates: %d sent %d failed",
 461                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 462                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 463         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 464                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 465                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 466         seq_printf(m, "\nLogoffs: %d sent %d failed",
 467                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 468                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 469         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 470                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 471                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 472         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 473                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 474                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 475         seq_printf(m, "\nCreates: %d sent %d failed",
 476                    atomic_read(&sent[SMB2_CREATE_HE]),
 477                    atomic_read(&failed[SMB2_CREATE_HE]));
 478         seq_printf(m, "\nCloses: %d sent %d failed",
 479                    atomic_read(&sent[SMB2_CLOSE_HE]),
 480                    atomic_read(&failed[SMB2_CLOSE_HE]));
 481         seq_printf(m, "\nFlushes: %d sent %d failed",
 482                    atomic_read(&sent[SMB2_FLUSH_HE]),
 483                    atomic_read(&failed[SMB2_FLUSH_HE]));
 484         seq_printf(m, "\nReads: %d sent %d failed",
 485                    atomic_read(&sent[SMB2_READ_HE]),
 486                    atomic_read(&failed[SMB2_READ_HE]));
 487         seq_printf(m, "\nWrites: %d sent %d failed",
 488                    atomic_read(&sent[SMB2_WRITE_HE]),
 489                    atomic_read(&failed[SMB2_WRITE_HE]));
 490         seq_printf(m, "\nLocks: %d sent %d failed",
 491                    atomic_read(&sent[SMB2_LOCK_HE]),
 492                    atomic_read(&failed[SMB2_LOCK_HE]));
 493         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 494                    atomic_read(&sent[SMB2_IOCTL_HE]),
 495                    atomic_read(&failed[SMB2_IOCTL_HE]));
 496         seq_printf(m, "\nCancels: %d sent %d failed",
 497                    atomic_read(&sent[SMB2_CANCEL_HE]),
 498                    atomic_read(&failed[SMB2_CANCEL_HE]));
 499         seq_printf(m, "\nEchos: %d sent %d failed",
 500                    atomic_read(&sent[SMB2_ECHO_HE]),
 501                    atomic_read(&failed[SMB2_ECHO_HE]));
 502         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 503                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 504                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 505         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 506                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 507                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 508         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 509                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 510                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 511         seq_printf(m, "\nSetInfos: %d sent %d failed",
 512                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 513                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 514         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 515                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 516                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 517 #endif
 518 }
 519
 520 static void
 521 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 522 {
 523         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 524         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 525
 526         cfile->fid.persistent_fid = fid->persistent_fid;
 527         cfile->fid.volatile_fid = fid->volatile_fid;
 528         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 529                                       &fid->purge_cache);
 530         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 531 }
 532
 533 static void
 534 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 535                 struct cifs_fid *fid)
 536 {
 537         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 538 }
 539
 540 static int
 541 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 542                      u64 persistent_fid, u64 volatile_fid,
 543                      struct copychunk_ioctl *pcchunk)
 544 {
 545         int rc;
 546         unsigned int ret_data_len;
 547         struct resume_key_req *res_key;
 548
 549         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 550                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 551                         NULL, 0 /* no input */,
 552                         (char **)&res_key, &ret_data_len);
 553
 554         if (rc) {
 555                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 556                 goto req_res_key_exit;
 557         }
 558         if (ret_data_len < sizeof(struct resume_key_req)) {
 559                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 560                 rc = -EINVAL;
 561                 goto req_res_key_exit;
 562         }
 563         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 564
 565 req_res_key_exit:
 566         kfree(res_key);
 567         return rc;
 568 }
 569
 570 static int
 571 smb2_clone_range(const unsigned int xid,
 572                         struct cifsFileInfo *srcfile,
 573                         struct cifsFileInfo *trgtfile, u64 src_off,
 574                         u64 len, u64 dest_off)
 575 {
 576         int rc;
 577         unsigned int ret_data_len;
 578         struct copychunk_ioctl *pcchunk;
 579         struct copychunk_ioctl_rsp *retbuf = NULL;
 580         struct cifs_tcon *tcon;
 581         int chunks_copied = 0;
 582         bool chunk_sizes_updated = false;
 583
 584         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 585
 586         if (pcchunk == NULL)
 587                 return -ENOMEM;
 588
 589         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 590         /* Request a key from the server to identify the source of the copy */
 591         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 592                                 srcfile->fid.persistent_fid,
 593                                 srcfile->fid.volatile_fid, pcchunk);
 594
 595         /* Note: request_res_key sets res_key null only if rc !=0 */
 596         if (rc)
 597                 goto cchunk_out;
 598
 599         /* For now array only one chunk long, will make more flexible later */
 600         pcchunk->ChunkCount = __constant_cpu_to_le32(1);
 601         pcchunk->Reserved = 0;
 602         pcchunk->Reserved2 = 0;
 603
 604         tcon = tlink_tcon(trgtfile->tlink);
 605
 606         while (len > 0) {
 607                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 608                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 609                 pcchunk->Length =
 610                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 611
 612                 /* Request server copy to target from src identified by key */
 613                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 614                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 615                         true /* is_fsctl */, (char *)pcchunk,
 616                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 617                         &ret_data_len);
 618                 if (rc == 0) {
 619                         if (ret_data_len !=
 620                                         sizeof(struct copychunk_ioctl_rsp)) {
 621                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 622                                 rc = -EIO;
 623                                 goto cchunk_out;
 624                         }
 625                         if (retbuf->TotalBytesWritten == 0) {
 626                                 cifs_dbg(FYI, "no bytes copied\n");
 627                                 rc = -EIO;
 628                                 goto cchunk_out;
 629                         }
 630                         /*
 631                          * Check if server claimed to write more than we asked
 632                          */
 633                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 634                             le32_to_cpu(pcchunk->Length)) {
 635                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 636                                 rc = -EIO;
 637                                 goto cchunk_out;
 638                         }
 639                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 640                                 cifs_dbg(VFS, "invalid num chunks written\n");
 641                                 rc = -EIO;
 642                                 goto cchunk_out;
 643                         }
 644                         chunks_copied++;
 645
 646                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 647                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 648                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 649
 650                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 651                                 le32_to_cpu(retbuf->ChunksWritten),
 652                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 653                                 le32_to_cpu(retbuf->TotalBytesWritten));
 654                 } else if (rc == -EINVAL) {
 655                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 656                                 goto cchunk_out;
 657
 658                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 659                                 le32_to_cpu(retbuf->ChunksWritten),
 660                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 661                                 le32_to_cpu(retbuf->TotalBytesWritten));
 662
 663                         /*
 664                          * Check if this is the first request using these sizes,
 665                          * (ie check if copy succeed once with original sizes
 666                          * and check if the server gave us different sizes after
 667                          * we already updated max sizes on previous request).
 668                          * if not then why is the server returning an error now
 669                          */
 670                         if ((chunks_copied != 0) || chunk_sizes_updated)
 671                                 goto cchunk_out;
 672
 673                         /* Check that server is not asking us to grow size */
 674                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 675                                         tcon->max_bytes_chunk)
 676                                 tcon->max_bytes_chunk =
 677                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 678                         else
 679                                 goto cchunk_out; /* server gave us bogus size */
 680
 681                         /* No need to change MaxChunks since already set to 1 */
 682                         chunk_sizes_updated = true;
 683                 }
 684         }
 685
 686 cchunk_out:
 687         kfree(pcchunk);
 688         return rc;
 689 }
 690
 691 static int
 692 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 693                 struct cifs_fid *fid)
 694 {
 695         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 696 }
 697
 698 static unsigned int
 699 smb2_read_data_offset(char *buf)
 700 {
 701         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 702         return rsp->DataOffset;
 703 }
 704
 705 static unsigned int
 706 smb2_read_data_length(char *buf)
 707 {
 708         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 709         return le32_to_cpu(rsp->DataLength);
 710 }
 711
 712
 713 static int
 714 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 715                struct cifs_io_parms *parms, unsigned int *bytes_read,
 716                char **buf, int *buf_type)
 717 {
 718         parms->persistent_fid = cfile->fid.persistent_fid;
 719         parms->volatile_fid = cfile->fid.volatile_fid;
 720         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 721 }
 722
 723 static int
 724 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 725                 struct cifs_io_parms *parms, unsigned int *written,
 726                 struct kvec *iov, unsigned long nr_segs)
 727 {
 728
 729         parms->persistent_fid = cfile->fid.persistent_fid;
 730         parms->volatile_fid = cfile->fid.volatile_fid;
 731         return SMB2_write(xid, parms, written, iov, nr_segs);
 732 }
 733
 734 static int
 735 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 736                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 737 {
 738         __le64 eof = cpu_to_le64(size);
 739         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 740                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 741 }
 742
 743 static int
 744 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 745                    struct cifsFileInfo *cfile)
 746 {
 747         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 748                             cfile->fid.volatile_fid);
 749 }
 750
 751 static int
 752 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 753                      const char *path, struct cifs_sb_info *cifs_sb,
 754                      struct cifs_fid *fid, __u16 search_flags,
 755                      struct cifs_search_info *srch_inf)
 756 {
 757         __le16 *utf16_path;
 758         int rc;
 759         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 760         struct cifs_open_parms oparms;
 761
 762         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 763         if (!utf16_path)
 764                 return -ENOMEM;
 765
 766         oparms.tcon = tcon;
 767         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 768         oparms.disposition = FILE_OPEN;
 769         oparms.create_options = 0;
 770         oparms.fid = fid;
 771         oparms.reconnect = false;
 772
 773         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 774         kfree(utf16_path);
 775         if (rc) {
 776                 cifs_dbg(VFS, "open dir failed\n");
 777                 return rc;
 778         }
 779
 780         srch_inf->entries_in_buffer = 0;
 781         srch_inf->index_of_last_entry = 0;
 782
 783         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 784                                   fid->volatile_fid, 0, srch_inf);
 785         if (rc) {
 786                 cifs_dbg(VFS, "query directory failed\n");
 787                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 788         }
 789         return rc;
 790 }
 791
 792 static int
 793 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 794                     struct cifs_fid *fid, __u16 search_flags,
 795                     struct cifs_search_info *srch_inf)
 796 {
 797         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 798                                     fid->volatile_fid, 0, srch_inf);
 799 }
 800
 801 static int
 802 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 803                struct cifs_fid *fid)
 804 {
 805         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 806 }
 807
 808 /*
 809 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 810 * the number of credits and return true. Otherwise - return false.
 811 */
 812 static bool
 813 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 814 {
 815         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 816
 817         if (hdr->Status != STATUS_PENDING)
 818                 return false;
 819
 820         if (!length) {
 821                 spin_lock(&server->req_lock);
 822                 server->credits += le16_to_cpu(hdr->CreditRequest);
 823                 spin_unlock(&server->req_lock);
 824                 wake_up(&server->request_q);
 825         }
 826
 827         return true;
 828 }
 829
 830 static int
 831 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 832                      struct cifsInodeInfo *cinode)
 833 {
 834         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 835                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 836                                         smb2_get_lease_state(cinode));
 837
 838         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 839                                  fid->volatile_fid,
 840                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 841 }
 842
 843 static int
 844 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 845              struct kstatfs *buf)
 846 {
 847         int rc;
 848         __le16 srch_path = 0; /* Null - open root of share */
 849         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 850         struct cifs_open_parms oparms;
 851         struct cifs_fid fid;
 852
 853         oparms.tcon = tcon;
 854         oparms.desired_access = FILE_READ_ATTRIBUTES;
 855         oparms.disposition = FILE_OPEN;
 856         oparms.create_options = 0;
 857         oparms.fid = &fid;
 858         oparms.reconnect = false;
 859
 860         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 861         if (rc)
 862                 return rc;
 863         buf->f_type = SMB2_MAGIC_NUMBER;
 864         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 865                            buf);
 866         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 867         return rc;
 868 }
 869
 870 static bool
 871 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 872 {
 873         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 874                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 875 }
 876
 877 static int
 878 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 879                __u64 length, __u32 type, int lock, int unlock, bool wait)
 880 {
 881         if (unlock && !lock)
 882                 type = SMB2_LOCKFLAG_UNLOCK;
 883         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 884                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 885                          current->tgid, length, offset, type, wait);
 886 }
 887
 888 static void
 889 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 890 {
 891         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 892 }
 893
 894 static void
 895 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 896 {
 897         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 898 }
 899
 900 static void
 901 smb2_new_lease_key(struct cifs_fid *fid)
 902 {
 903         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 904 }
 905
 906 static int
 907 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 908                    const char *full_path, char **target_path,
 909                    struct cifs_sb_info *cifs_sb)
 910 {
 911         int rc;
 912         __le16 *utf16_path;
 913         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 914         struct cifs_open_parms oparms;
 915         struct cifs_fid fid;
 916         struct smb2_err_rsp *err_buf = NULL;
 917         struct smb2_symlink_err_rsp *symlink;
 918         unsigned int sub_len, sub_offset;
 919
 920         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 921
 922         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 923         if (!utf16_path)
 924                 return -ENOMEM;
 925
 926         oparms.tcon = tcon;
 927         oparms.desired_access = FILE_READ_ATTRIBUTES;
 928         oparms.disposition = FILE_OPEN;
 929         oparms.create_options = 0;
 930         oparms.fid = &fid;
 931         oparms.reconnect = false;
 932
 933         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 934
 935         if (!rc || !err_buf) {
 936                 kfree(utf16_path);
 937                 return -ENOENT;
 938         }
 939         /* open must fail on symlink - reset rc */
 940         rc = 0;
 941         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
 942         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
 943         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
 944         *target_path = cifs_strndup_from_utf16(
 945                                 (char *)symlink->PathBuffer + sub_offset,
 946                                 sub_len, true, cifs_sb->local_nls);
 947         if (!(*target_path)) {
 948                 kfree(utf16_path);
 949                 return -ENOMEM;
 950         }
 951         convert_delimiter(*target_path, '/');
 952         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 953         kfree(utf16_path);
 954         return rc;
 955 }
 956
 957 static void
 958 smb2_downgrade_oplock(struct TCP_Server_Info *server,
 959                         struct cifsInodeInfo *cinode, bool set_level2)
 960 {
 961         if (set_level2)
 962                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
 963                                                 0, NULL);
 964         else
 965                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
 966 }
 967
 968 static void
 969 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 970                       unsigned int epoch, bool *purge_cache)
 971 {
 972         oplock &= 0xFF;
 973         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 974                 return;
 975         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
 976                 cinode->oplock = CIFS_CACHE_RHW_FLG;
 977                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
 978                          &cinode->vfs_inode);
 979         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
 980                 cinode->oplock = CIFS_CACHE_RW_FLG;
 981                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
 982                          &cinode->vfs_inode);
 983         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
 984                 cinode->oplock = CIFS_CACHE_READ_FLG;
 985                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
 986                          &cinode->vfs_inode);
 987         } else
 988                 cinode->oplock = 0;
 989 }
 990
 991 static void
 992 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 993                        unsigned int epoch, bool *purge_cache)
 994 {
 995         char message[5] = {0};
 996
 997         oplock &= 0xFF;
 998         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 999                 return;
1000
1001         cinode->oplock = 0;
1002         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1003                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1004                 strcat(message, "R");
1005         }
1006         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1007                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1008                 strcat(message, "H");
1009         }
1010         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1011                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1012                 strcat(message, "W");
1013         }
1014         if (!cinode->oplock)
1015                 strcat(message, "None");
1016         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1017                  &cinode->vfs_inode);
1018 }
1019
1020 static void
1021 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1022                       unsigned int epoch, bool *purge_cache)
1023 {
1024         unsigned int old_oplock = cinode->oplock;
1025
1026         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1027
1028         if (purge_cache) {
1029                 *purge_cache = false;
1030                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1031                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1032                             (epoch - cinode->epoch > 0))
1033                                 *purge_cache = true;
1034                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1035                                  (epoch - cinode->epoch > 1))
1036                                 *purge_cache = true;
1037                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1038                                  (epoch - cinode->epoch > 1))
1039                                 *purge_cache = true;
1040                         else if (cinode->oplock == 0 &&
1041                                  (epoch - cinode->epoch > 0))
1042                                 *purge_cache = true;
1043                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1044                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1045                             (epoch - cinode->epoch > 0))
1046                                 *purge_cache = true;
1047                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1048                                  (epoch - cinode->epoch > 1))
1049                                 *purge_cache = true;
1050                 }
1051                 cinode->epoch = epoch;
1052         }
1053 }
1054
1055 static bool
1056 smb2_is_read_op(__u32 oplock)
1057 {
1058         return oplock == SMB2_OPLOCK_LEVEL_II;
1059 }
1060
1061 static bool
1062 smb21_is_read_op(__u32 oplock)
1063 {
1064         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1065                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1066 }
1067
1068 static __le32
1069 map_oplock_to_lease(u8 oplock)
1070 {
1071         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1072                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1073         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1074                 return SMB2_LEASE_READ_CACHING;
1075         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1076                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1077                        SMB2_LEASE_WRITE_CACHING;
1078         return 0;
1079 }
1080
1081 static char *
1082 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1083 {
1084         struct create_lease *buf;
1085
1086         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1087         if (!buf)
1088                 return NULL;
1089
1090         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1091         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1092         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1093
1094         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1095                                         (struct create_lease, lcontext));
1096         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1097         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1098                                 (struct create_lease, Name));
1099         buf->ccontext.NameLength = cpu_to_le16(4);
1100         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1101         buf->Name[0] = 'R';
1102         buf->Name[1] = 'q';
1103         buf->Name[2] = 'L';
1104         buf->Name[3] = 's';
1105         return (char *)buf;
1106 }
1107
1108 static char *
1109 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1110 {
1111         struct create_lease_v2 *buf;
1112
1113         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1114         if (!buf)
1115                 return NULL;
1116
1117         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1118         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1119         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1120
1121         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1122                                         (struct create_lease_v2, lcontext));
1123         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1124         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1125                                 (struct create_lease_v2, Name));
1126         buf->ccontext.NameLength = cpu_to_le16(4);
1127         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1128         buf->Name[0] = 'R';
1129         buf->Name[1] = 'q';
1130         buf->Name[2] = 'L';
1131         buf->Name[3] = 's';
1132         return (char *)buf;
1133 }
1134
1135 static __u8
1136 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1137 {
1138         struct create_lease *lc = (struct create_lease *)buf;
1139
1140         *epoch = 0; /* not used */
1141         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1142                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1143         return le32_to_cpu(lc->lcontext.LeaseState);
1144 }
1145
1146 static __u8
1147 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1148 {
1149         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1150
1151         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1152         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1153                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1154         return le32_to_cpu(lc->lcontext.LeaseState);
1155 }
1156
1157 static unsigned int
1158 smb2_wp_retry_size(struct inode *inode)
1159 {
1160         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1161                      SMB2_MAX_BUFFER_SIZE);
1162 }
1163
1164 struct smb_version_operations smb20_operations = {
1165         .compare_fids = smb2_compare_fids,
1166         .setup_request = smb2_setup_request,
1167         .setup_async_request = smb2_setup_async_request,
1168         .check_receive = smb2_check_receive,
1169         .add_credits = smb2_add_credits,
1170         .set_credits = smb2_set_credits,
1171         .get_credits_field = smb2_get_credits_field,
1172         .get_credits = smb2_get_credits,
1173         .wait_mtu_credits = cifs_wait_mtu_credits,
1174         .get_next_mid = smb2_get_next_mid,
1175         .read_data_offset = smb2_read_data_offset,
1176         .read_data_length = smb2_read_data_length,
1177         .map_error = map_smb2_to_linux_error,
1178         .find_mid = smb2_find_mid,
1179         .check_message = smb2_check_message,
1180         .dump_detail = smb2_dump_detail,
1181         .clear_stats = smb2_clear_stats,
1182         .print_stats = smb2_print_stats,
1183         .is_oplock_break = smb2_is_valid_oplock_break,
1184         .downgrade_oplock = smb2_downgrade_oplock,
1185         .need_neg = smb2_need_neg,
1186         .negotiate = smb2_negotiate,
1187         .negotiate_wsize = smb2_negotiate_wsize,
1188         .negotiate_rsize = smb2_negotiate_rsize,
1189         .sess_setup = SMB2_sess_setup,
1190         .logoff = SMB2_logoff,
1191         .tree_connect = SMB2_tcon,
1192         .tree_disconnect = SMB2_tdis,
1193         .qfs_tcon = smb2_qfs_tcon,
1194         .is_path_accessible = smb2_is_path_accessible,
1195         .can_echo = smb2_can_echo,
1196         .echo = SMB2_echo,
1197         .query_path_info = smb2_query_path_info,
1198         .get_srv_inum = smb2_get_srv_inum,
1199         .query_file_info = smb2_query_file_info,
1200         .set_path_size = smb2_set_path_size,
1201         .set_file_size = smb2_set_file_size,
1202         .set_file_info = smb2_set_file_info,
1203         .set_compression = smb2_set_compression,
1204         .mkdir = smb2_mkdir,
1205         .mkdir_setinfo = smb2_mkdir_setinfo,
1206         .rmdir = smb2_rmdir,
1207         .unlink = smb2_unlink,
1208         .rename = smb2_rename_path,
1209         .create_hardlink = smb2_create_hardlink,
1210         .query_symlink = smb2_query_symlink,
1211         .open = smb2_open_file,
1212         .set_fid = smb2_set_fid,
1213         .close = smb2_close_file,
1214         .flush = smb2_flush_file,
1215         .async_readv = smb2_async_readv,
1216         .async_writev = smb2_async_writev,
1217         .sync_read = smb2_sync_read,
1218         .sync_write = smb2_sync_write,
1219         .query_dir_first = smb2_query_dir_first,
1220         .query_dir_next = smb2_query_dir_next,
1221         .close_dir = smb2_close_dir,
1222         .calc_smb_size = smb2_calc_size,
1223         .is_status_pending = smb2_is_status_pending,
1224         .oplock_response = smb2_oplock_response,
1225         .queryfs = smb2_queryfs,
1226         .mand_lock = smb2_mand_lock,
1227         .mand_unlock_range = smb2_unlock_range,
1228         .push_mand_locks = smb2_push_mandatory_locks,
1229         .get_lease_key = smb2_get_lease_key,
1230         .set_lease_key = smb2_set_lease_key,
1231         .new_lease_key = smb2_new_lease_key,
1232         .calc_signature = smb2_calc_signature,
1233         .is_read_op = smb2_is_read_op,
1234         .set_oplock_level = smb2_set_oplock_level,
1235         .create_lease_buf = smb2_create_lease_buf,
1236         .parse_lease_buf = smb2_parse_lease_buf,
1237         .clone_range = smb2_clone_range,
1238         .wp_retry_size = smb2_wp_retry_size,
1239 };
1240
1241 struct smb_version_operations smb21_operations = {
1242         .compare_fids = smb2_compare_fids,
1243         .setup_request = smb2_setup_request,
1244         .setup_async_request = smb2_setup_async_request,
1245         .check_receive = smb2_check_receive,
1246         .add_credits = smb2_add_credits,
1247         .set_credits = smb2_set_credits,
1248         .get_credits_field = smb2_get_credits_field,
1249         .get_credits = smb2_get_credits,
1250         .wait_mtu_credits = smb2_wait_mtu_credits,
1251         .get_next_mid = smb2_get_next_mid,
1252         .read_data_offset = smb2_read_data_offset,
1253         .read_data_length = smb2_read_data_length,
1254         .map_error = map_smb2_to_linux_error,
1255         .find_mid = smb2_find_mid,
1256         .check_message = smb2_check_message,
1257         .dump_detail = smb2_dump_detail,
1258         .clear_stats = smb2_clear_stats,
1259         .print_stats = smb2_print_stats,
1260         .is_oplock_break = smb2_is_valid_oplock_break,
1261         .downgrade_oplock = smb2_downgrade_oplock,
1262         .need_neg = smb2_need_neg,
1263         .negotiate = smb2_negotiate,
1264         .negotiate_wsize = smb2_negotiate_wsize,
1265         .negotiate_rsize = smb2_negotiate_rsize,
1266         .sess_setup = SMB2_sess_setup,
1267         .logoff = SMB2_logoff,
1268         .tree_connect = SMB2_tcon,
1269         .tree_disconnect = SMB2_tdis,
1270         .qfs_tcon = smb2_qfs_tcon,
1271         .is_path_accessible = smb2_is_path_accessible,
1272         .can_echo = smb2_can_echo,
1273         .echo = SMB2_echo,
1274         .query_path_info = smb2_query_path_info,
1275         .get_srv_inum = smb2_get_srv_inum,
1276         .query_file_info = smb2_query_file_info,
1277         .set_path_size = smb2_set_path_size,
1278         .set_file_size = smb2_set_file_size,
1279         .set_file_info = smb2_set_file_info,
1280         .set_compression = smb2_set_compression,
1281         .mkdir = smb2_mkdir,
1282         .mkdir_setinfo = smb2_mkdir_setinfo,
1283         .rmdir = smb2_rmdir,
1284         .unlink = smb2_unlink,
1285         .rename = smb2_rename_path,
1286         .create_hardlink = smb2_create_hardlink,
1287         .query_symlink = smb2_query_symlink,
1288         .open = smb2_open_file,
1289         .set_fid = smb2_set_fid,
1290         .close = smb2_close_file,
1291         .flush = smb2_flush_file,
1292         .async_readv = smb2_async_readv,
1293         .async_writev = smb2_async_writev,
1294         .sync_read = smb2_sync_read,
1295         .sync_write = smb2_sync_write,
1296         .query_dir_first = smb2_query_dir_first,
1297         .query_dir_next = smb2_query_dir_next,
1298         .close_dir = smb2_close_dir,
1299         .calc_smb_size = smb2_calc_size,
1300         .is_status_pending = smb2_is_status_pending,
1301         .oplock_response = smb2_oplock_response,
1302         .queryfs = smb2_queryfs,
1303         .mand_lock = smb2_mand_lock,
1304         .mand_unlock_range = smb2_unlock_range,
1305         .push_mand_locks = smb2_push_mandatory_locks,
1306         .get_lease_key = smb2_get_lease_key,
1307         .set_lease_key = smb2_set_lease_key,
1308         .new_lease_key = smb2_new_lease_key,
1309         .calc_signature = smb2_calc_signature,
1310         .is_read_op = smb21_is_read_op,
1311         .set_oplock_level = smb21_set_oplock_level,
1312         .create_lease_buf = smb2_create_lease_buf,
1313         .parse_lease_buf = smb2_parse_lease_buf,
1314         .clone_range = smb2_clone_range,
1315         .wp_retry_size = smb2_wp_retry_size,
1316 };
1317
1318 struct smb_version_operations smb30_operations = {
1319         .compare_fids = smb2_compare_fids,
1320         .setup_request = smb2_setup_request,
1321         .setup_async_request = smb2_setup_async_request,
1322         .check_receive = smb2_check_receive,
1323         .add_credits = smb2_add_credits,
1324         .set_credits = smb2_set_credits,
1325         .get_credits_field = smb2_get_credits_field,
1326         .get_credits = smb2_get_credits,
1327         .wait_mtu_credits = smb2_wait_mtu_credits,
1328         .get_next_mid = smb2_get_next_mid,
1329         .read_data_offset = smb2_read_data_offset,
1330         .read_data_length = smb2_read_data_length,
1331         .map_error = map_smb2_to_linux_error,
1332         .find_mid = smb2_find_mid,
1333         .check_message = smb2_check_message,
1334         .dump_detail = smb2_dump_detail,
1335         .clear_stats = smb2_clear_stats,
1336         .print_stats = smb2_print_stats,
1337         .dump_share_caps = smb2_dump_share_caps,
1338         .is_oplock_break = smb2_is_valid_oplock_break,
1339         .downgrade_oplock = smb2_downgrade_oplock,
1340         .need_neg = smb2_need_neg,
1341         .negotiate = smb2_negotiate,
1342         .negotiate_wsize = smb2_negotiate_wsize,
1343         .negotiate_rsize = smb2_negotiate_rsize,
1344         .sess_setup = SMB2_sess_setup,
1345         .logoff = SMB2_logoff,
1346         .tree_connect = SMB2_tcon,
1347         .tree_disconnect = SMB2_tdis,
1348         .qfs_tcon = smb3_qfs_tcon,
1349         .is_path_accessible = smb2_is_path_accessible,
1350         .can_echo = smb2_can_echo,
1351         .echo = SMB2_echo,
1352         .query_path_info = smb2_query_path_info,
1353         .get_srv_inum = smb2_get_srv_inum,
1354         .query_file_info = smb2_query_file_info,
1355         .set_path_size = smb2_set_path_size,
1356         .set_file_size = smb2_set_file_size,
1357         .set_file_info = smb2_set_file_info,
1358         .set_compression = smb2_set_compression,
1359         .mkdir = smb2_mkdir,
1360         .mkdir_setinfo = smb2_mkdir_setinfo,
1361         .rmdir = smb2_rmdir,
1362         .unlink = smb2_unlink,
1363         .rename = smb2_rename_path,
1364         .create_hardlink = smb2_create_hardlink,
1365         .query_symlink = smb2_query_symlink,
1366         .open = smb2_open_file,
1367         .set_fid = smb2_set_fid,
1368         .close = smb2_close_file,
1369         .flush = smb2_flush_file,
1370         .async_readv = smb2_async_readv,
1371         .async_writev = smb2_async_writev,
1372         .sync_read = smb2_sync_read,
1373         .sync_write = smb2_sync_write,
1374         .query_dir_first = smb2_query_dir_first,
1375         .query_dir_next = smb2_query_dir_next,
1376         .close_dir = smb2_close_dir,
1377         .calc_smb_size = smb2_calc_size,
1378         .is_status_pending = smb2_is_status_pending,
1379         .oplock_response = smb2_oplock_response,
1380         .queryfs = smb2_queryfs,
1381         .mand_lock = smb2_mand_lock,
1382         .mand_unlock_range = smb2_unlock_range,
1383         .push_mand_locks = smb2_push_mandatory_locks,
1384         .get_lease_key = smb2_get_lease_key,
1385         .set_lease_key = smb2_set_lease_key,
1386         .new_lease_key = smb2_new_lease_key,
1387         .generate_signingkey = generate_smb3signingkey,
1388         .calc_signature = smb3_calc_signature,
1389         .is_read_op = smb21_is_read_op,
1390         .set_oplock_level = smb3_set_oplock_level,
1391         .create_lease_buf = smb3_create_lease_buf,
1392         .parse_lease_buf = smb3_parse_lease_buf,
1393         .clone_range = smb2_clone_range,
1394         .validate_negotiate = smb3_validate_negotiate,
1395         .wp_retry_size = smb2_wp_retry_size,
1396 };
1397
1398 struct smb_version_values smb20_values = {
1399         .version_string = SMB20_VERSION_STRING,
1400         .protocol_id = SMB20_PROT_ID,
1401         .req_capabilities = 0, /* MBZ */
1402         .large_lock_type = 0,
1403         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1404         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1405         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1406         .header_size = sizeof(struct smb2_hdr),
1407         .max_header_size = MAX_SMB2_HDR_SIZE,
1408         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1409         .lock_cmd = SMB2_LOCK,
1410         .cap_unix = 0,
1411         .cap_nt_find = SMB2_NT_FIND,
1412         .cap_large_files = SMB2_LARGE_FILES,
1413         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1414         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1415         .create_lease_size = sizeof(struct create_lease),
1416 };
1417
1418 struct smb_version_values smb21_values = {
1419         .version_string = SMB21_VERSION_STRING,
1420         .protocol_id = SMB21_PROT_ID,
1421         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1422         .large_lock_type = 0,
1423         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1424         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1425         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1426         .header_size = sizeof(struct smb2_hdr),
1427         .max_header_size = MAX_SMB2_HDR_SIZE,
1428         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1429         .lock_cmd = SMB2_LOCK,
1430         .cap_unix = 0,
1431         .cap_nt_find = SMB2_NT_FIND,
1432         .cap_large_files = SMB2_LARGE_FILES,
1433         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1434         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1435         .create_lease_size = sizeof(struct create_lease),
1436 };
1437
1438 struct smb_version_values smb30_values = {
1439         .version_string = SMB30_VERSION_STRING,
1440         .protocol_id = SMB30_PROT_ID,
1441         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1442         .large_lock_type = 0,
1443         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1444         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1445         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1446         .header_size = sizeof(struct smb2_hdr),
1447         .max_header_size = MAX_SMB2_HDR_SIZE,
1448         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1449         .lock_cmd = SMB2_LOCK,
1450         .cap_unix = 0,
1451         .cap_nt_find = SMB2_NT_FIND,
1452         .cap_large_files = SMB2_LARGE_FILES,
1453         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1454         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1455         .create_lease_size = sizeof(struct create_lease_v2),
1456 };
1457
1458 struct smb_version_values smb302_values = {
1459         .version_string = SMB302_VERSION_STRING,
1460         .protocol_id = SMB302_PROT_ID,
1461         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1462         .large_lock_type = 0,
1463         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1464         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1465         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1466         .header_size = sizeof(struct smb2_hdr),
1467         .max_header_size = MAX_SMB2_HDR_SIZE,
1468         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1469         .lock_cmd = SMB2_LOCK,
1470         .cap_unix = 0,
1471         .cap_nt_find = SMB2_NT_FIND,
1472         .cap_large_files = SMB2_LARGE_FILES,
1473         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1474         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1475         .create_lease_size = sizeof(struct create_lease_v2),
1476 };