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         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 180
 181         spin_lock(&GlobalMid_Lock);
 182         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 183                 if ((mid->mid == wire_mid) &&
 184                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 185                     (mid->command == hdr->Command)) {
 186                         spin_unlock(&GlobalMid_Lock);
 187                         return mid;
 188                 }
 189         }
 190         spin_unlock(&GlobalMid_Lock);
 191         return NULL;
 192 }
 193
 194 static void
 195 smb2_dump_detail(void *buf)
 196 {
 197 #ifdef CONFIG_CIFS_DEBUG2
 198         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 199
 200         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 201                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 202                  smb->ProcessId);
 203         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 204 #endif
 205 }
 206
 207 static bool
 208 smb2_need_neg(struct TCP_Server_Info *server)
 209 {
 210         return server->max_read == 0;
 211 }
 212
 213 static int
 214 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 215 {
 216         int rc;
 217         ses->server->CurrentMid = 0;
 218         rc = SMB2_negotiate(xid, ses);
 219         /* BB we probably don't need to retry with modern servers */
 220         if (rc == -EAGAIN)
 221                 rc = -EHOSTDOWN;
 222         return rc;
 223 }
 224
 225 static unsigned int
 226 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 227 {
 228         struct TCP_Server_Info *server = tcon->ses->server;
 229         unsigned int wsize;
 230
 231         /* start with specified wsize, or default */
 232         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 233         wsize = min_t(unsigned int, wsize, server->max_write);
 234
 235         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 236                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 237
 238         return wsize;
 239 }
 240
 241 static unsigned int
 242 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 243 {
 244         struct TCP_Server_Info *server = tcon->ses->server;
 245         unsigned int rsize;
 246
 247         /* start with specified rsize, or default */
 248         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 249         rsize = min_t(unsigned int, rsize, server->max_read);
 250
 251         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 252                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 253
 254         return rsize;
 255 }
 256
 257 #ifdef CONFIG_CIFS_STATS2
 258 static int
 259 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 260 {
 261         int rc;
 262         unsigned int ret_data_len = 0;
 263         struct network_interface_info_ioctl_rsp *out_buf;
 264
 265         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 266                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 267                         NULL /* no data input */, 0 /* no data input */,
 268                         (char **)&out_buf, &ret_data_len);
 269         if (rc != 0)
 270                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 271         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 272                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 273                 rc = -EINVAL;
 274         } else {
 275                 /* Dump info on first interface */
 276                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 277                         le32_to_cpu(out_buf->Capability));
 278                 cifs_dbg(FYI, "Link Speed %lld\n",
 279                         le64_to_cpu(out_buf->LinkSpeed));
 280         }
 281
 282         return rc;
 283 }
 284 #endif /* STATS2 */
 285
 286 static void
 287 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 288 {
 289         int rc;
 290         __le16 srch_path = 0; /* Null - open root of share */
 291         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 292         struct cifs_open_parms oparms;
 293         struct cifs_fid fid;
 294
 295         oparms.tcon = tcon;
 296         oparms.desired_access = FILE_READ_ATTRIBUTES;
 297         oparms.disposition = FILE_OPEN;
 298         oparms.create_options = 0;
 299         oparms.fid = &fid;
 300         oparms.reconnect = false;
 301
 302         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 303         if (rc)
 304                 return;
 305
 306 #ifdef CONFIG_CIFS_STATS2
 307         SMB3_request_interfaces(xid, tcon);
 308 #endif /* STATS2 */
 309
 310         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 311                         FS_ATTRIBUTE_INFORMATION);
 312         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 313                         FS_DEVICE_INFORMATION);
 314         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 315                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 316         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 317         return;
 318 }
 319
 320 static void
 321 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 322 {
 323         int rc;
 324         __le16 srch_path = 0; /* Null - open root of share */
 325         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 326         struct cifs_open_parms oparms;
 327         struct cifs_fid fid;
 328
 329         oparms.tcon = tcon;
 330         oparms.desired_access = FILE_READ_ATTRIBUTES;
 331         oparms.disposition = FILE_OPEN;
 332         oparms.create_options = 0;
 333         oparms.fid = &fid;
 334         oparms.reconnect = false;
 335
 336         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 337         if (rc)
 338                 return;
 339
 340         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 341                         FS_ATTRIBUTE_INFORMATION);
 342         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 343                         FS_DEVICE_INFORMATION);
 344         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 345         return;
 346 }
 347
 348 static int
 349 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 350                         struct cifs_sb_info *cifs_sb, const char *full_path)
 351 {
 352         int rc;
 353         __le16 *utf16_path;
 354         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 355         struct cifs_open_parms oparms;
 356         struct cifs_fid fid;
 357
 358         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 359         if (!utf16_path)
 360                 return -ENOMEM;
 361
 362         oparms.tcon = tcon;
 363         oparms.desired_access = FILE_READ_ATTRIBUTES;
 364         oparms.disposition = FILE_OPEN;
 365         oparms.create_options = 0;
 366         oparms.fid = &fid;
 367         oparms.reconnect = false;
 368
 369         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 370         if (rc) {
 371                 kfree(utf16_path);
 372                 return rc;
 373         }
 374
 375         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 376         kfree(utf16_path);
 377         return rc;
 378 }
 379
 380 static int
 381 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 382                   struct cifs_sb_info *cifs_sb, const char *full_path,
 383                   u64 *uniqueid, FILE_ALL_INFO *data)
 384 {
 385         *uniqueid = le64_to_cpu(data->IndexNumber);
 386         return 0;
 387 }
 388
 389 static int
 390 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 391                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 392 {
 393         int rc;
 394         struct smb2_file_all_info *smb2_data;
 395
 396         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 397                             GFP_KERNEL);
 398         if (smb2_data == NULL)
 399                 return -ENOMEM;
 400
 401         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 402                              smb2_data);
 403         if (!rc)
 404                 move_smb2_info_to_cifs(data, smb2_data);
 405         kfree(smb2_data);
 406         return rc;
 407 }
 408
 409 static bool
 410 smb2_can_echo(struct TCP_Server_Info *server)
 411 {
 412         return server->echoes;
 413 }
 414
 415 static void
 416 smb2_clear_stats(struct cifs_tcon *tcon)
 417 {
 418 #ifdef CONFIG_CIFS_STATS
 419         int i;
 420         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 421                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 422                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 423         }
 424 #endif
 425 }
 426
 427 static void
 428 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 429 {
 430         seq_puts(m, "\n\tShare Capabilities:");
 431         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 432                 seq_puts(m, " DFS,");
 433         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 434                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 435         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 436                 seq_puts(m, " SCALEOUT,");
 437         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 438                 seq_puts(m, " CLUSTER,");
 439         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 440                 seq_puts(m, " ASYMMETRIC,");
 441         if (tcon->capabilities == 0)
 442                 seq_puts(m, " None");
 443         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 444                 seq_puts(m, " Aligned,");
 445         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 446                 seq_puts(m, " Partition Aligned,");
 447         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 448                 seq_puts(m, " SSD,");
 449         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 450                 seq_puts(m, " TRIM-support,");
 451
 452         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 453         if (tcon->perf_sector_size)
 454                 seq_printf(m, "\tOptimal sector size: 0x%x",
 455                            tcon->perf_sector_size);
 456 }
 457
 458 static void
 459 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 460 {
 461 #ifdef CONFIG_CIFS_STATS
 462         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 463         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 464         seq_printf(m, "\nNegotiates: %d sent %d failed",
 465                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 466                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 467         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 468                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 469                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 470         seq_printf(m, "\nLogoffs: %d sent %d failed",
 471                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 472                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 473         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 474                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 475                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 476         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 477                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 478                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 479         seq_printf(m, "\nCreates: %d sent %d failed",
 480                    atomic_read(&sent[SMB2_CREATE_HE]),
 481                    atomic_read(&failed[SMB2_CREATE_HE]));
 482         seq_printf(m, "\nCloses: %d sent %d failed",
 483                    atomic_read(&sent[SMB2_CLOSE_HE]),
 484                    atomic_read(&failed[SMB2_CLOSE_HE]));
 485         seq_printf(m, "\nFlushes: %d sent %d failed",
 486                    atomic_read(&sent[SMB2_FLUSH_HE]),
 487                    atomic_read(&failed[SMB2_FLUSH_HE]));
 488         seq_printf(m, "\nReads: %d sent %d failed",
 489                    atomic_read(&sent[SMB2_READ_HE]),
 490                    atomic_read(&failed[SMB2_READ_HE]));
 491         seq_printf(m, "\nWrites: %d sent %d failed",
 492                    atomic_read(&sent[SMB2_WRITE_HE]),
 493                    atomic_read(&failed[SMB2_WRITE_HE]));
 494         seq_printf(m, "\nLocks: %d sent %d failed",
 495                    atomic_read(&sent[SMB2_LOCK_HE]),
 496                    atomic_read(&failed[SMB2_LOCK_HE]));
 497         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 498                    atomic_read(&sent[SMB2_IOCTL_HE]),
 499                    atomic_read(&failed[SMB2_IOCTL_HE]));
 500         seq_printf(m, "\nCancels: %d sent %d failed",
 501                    atomic_read(&sent[SMB2_CANCEL_HE]),
 502                    atomic_read(&failed[SMB2_CANCEL_HE]));
 503         seq_printf(m, "\nEchos: %d sent %d failed",
 504                    atomic_read(&sent[SMB2_ECHO_HE]),
 505                    atomic_read(&failed[SMB2_ECHO_HE]));
 506         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 507                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 508                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 509         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 510                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 511                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 512         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 513                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 514                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 515         seq_printf(m, "\nSetInfos: %d sent %d failed",
 516                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 517                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 518         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 519                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 520                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 521 #endif
 522 }
 523
 524 static void
 525 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 526 {
 527         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 528         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 529
 530         cfile->fid.persistent_fid = fid->persistent_fid;
 531         cfile->fid.volatile_fid = fid->volatile_fid;
 532         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 533                                       &fid->purge_cache);
 534         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 535 }
 536
 537 static void
 538 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 539                 struct cifs_fid *fid)
 540 {
 541         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 542 }
 543
 544 static int
 545 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 546                      u64 persistent_fid, u64 volatile_fid,
 547                      struct copychunk_ioctl *pcchunk)
 548 {
 549         int rc;
 550         unsigned int ret_data_len;
 551         struct resume_key_req *res_key;
 552
 553         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 554                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 555                         NULL, 0 /* no input */,
 556                         (char **)&res_key, &ret_data_len);
 557
 558         if (rc) {
 559                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 560                 goto req_res_key_exit;
 561         }
 562         if (ret_data_len < sizeof(struct resume_key_req)) {
 563                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 564                 rc = -EINVAL;
 565                 goto req_res_key_exit;
 566         }
 567         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 568
 569 req_res_key_exit:
 570         kfree(res_key);
 571         return rc;
 572 }
 573
 574 static int
 575 smb2_clone_range(const unsigned int xid,
 576                         struct cifsFileInfo *srcfile,
 577                         struct cifsFileInfo *trgtfile, u64 src_off,
 578                         u64 len, u64 dest_off)
 579 {
 580         int rc;
 581         unsigned int ret_data_len;
 582         struct copychunk_ioctl *pcchunk;
 583         struct copychunk_ioctl_rsp *retbuf = NULL;
 584         struct cifs_tcon *tcon;
 585         int chunks_copied = 0;
 586         bool chunk_sizes_updated = false;
 587
 588         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 589
 590         if (pcchunk == NULL)
 591                 return -ENOMEM;
 592
 593         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 594         /* Request a key from the server to identify the source of the copy */
 595         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 596                                 srcfile->fid.persistent_fid,
 597                                 srcfile->fid.volatile_fid, pcchunk);
 598
 599         /* Note: request_res_key sets res_key null only if rc !=0 */
 600         if (rc)
 601                 goto cchunk_out;
 602
 603         /* For now array only one chunk long, will make more flexible later */
 604         pcchunk->ChunkCount = cpu_to_le32(1);
 605         pcchunk->Reserved = 0;
 606         pcchunk->Reserved2 = 0;
 607
 608         tcon = tlink_tcon(trgtfile->tlink);
 609
 610         while (len > 0) {
 611                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 612                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 613                 pcchunk->Length =
 614                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 615
 616                 /* Request server copy to target from src identified by key */
 617                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 618                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 619                         true /* is_fsctl */, (char *)pcchunk,
 620                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 621                         &ret_data_len);
 622                 if (rc == 0) {
 623                         if (ret_data_len !=
 624                                         sizeof(struct copychunk_ioctl_rsp)) {
 625                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 626                                 rc = -EIO;
 627                                 goto cchunk_out;
 628                         }
 629                         if (retbuf->TotalBytesWritten == 0) {
 630                                 cifs_dbg(FYI, "no bytes copied\n");
 631                                 rc = -EIO;
 632                                 goto cchunk_out;
 633                         }
 634                         /*
 635                          * Check if server claimed to write more than we asked
 636                          */
 637                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 638                             le32_to_cpu(pcchunk->Length)) {
 639                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 640                                 rc = -EIO;
 641                                 goto cchunk_out;
 642                         }
 643                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 644                                 cifs_dbg(VFS, "invalid num chunks written\n");
 645                                 rc = -EIO;
 646                                 goto cchunk_out;
 647                         }
 648                         chunks_copied++;
 649
 650                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 651                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 652                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 653
 654                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 655                                 le32_to_cpu(retbuf->ChunksWritten),
 656                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 657                                 le32_to_cpu(retbuf->TotalBytesWritten));
 658                 } else if (rc == -EINVAL) {
 659                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 660                                 goto cchunk_out;
 661
 662                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 663                                 le32_to_cpu(retbuf->ChunksWritten),
 664                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 665                                 le32_to_cpu(retbuf->TotalBytesWritten));
 666
 667                         /*
 668                          * Check if this is the first request using these sizes,
 669                          * (ie check if copy succeed once with original sizes
 670                          * and check if the server gave us different sizes after
 671                          * we already updated max sizes on previous request).
 672                          * if not then why is the server returning an error now
 673                          */
 674                         if ((chunks_copied != 0) || chunk_sizes_updated)
 675                                 goto cchunk_out;
 676
 677                         /* Check that server is not asking us to grow size */
 678                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 679                                         tcon->max_bytes_chunk)
 680                                 tcon->max_bytes_chunk =
 681                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 682                         else
 683                                 goto cchunk_out; /* server gave us bogus size */
 684
 685                         /* No need to change MaxChunks since already set to 1 */
 686                         chunk_sizes_updated = true;
 687                 } else
 688                         goto cchunk_out;
 689         }
 690
 691 cchunk_out:
 692         kfree(pcchunk);
 693         return rc;
 694 }
 695
 696 static int
 697 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 698                 struct cifs_fid *fid)
 699 {
 700         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 701 }
 702
 703 static unsigned int
 704 smb2_read_data_offset(char *buf)
 705 {
 706         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 707         return rsp->DataOffset;
 708 }
 709
 710 static unsigned int
 711 smb2_read_data_length(char *buf)
 712 {
 713         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 714         return le32_to_cpu(rsp->DataLength);
 715 }
 716
 717
 718 static int
 719 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 720                struct cifs_io_parms *parms, unsigned int *bytes_read,
 721                char **buf, int *buf_type)
 722 {
 723         parms->persistent_fid = pfid->persistent_fid;
 724         parms->volatile_fid = pfid->volatile_fid;
 725         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 726 }
 727
 728 static int
 729 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 730                 struct cifs_io_parms *parms, unsigned int *written,
 731                 struct kvec *iov, unsigned long nr_segs)
 732 {
 733
 734         parms->persistent_fid = pfid->persistent_fid;
 735         parms->volatile_fid = pfid->volatile_fid;
 736         return SMB2_write(xid, parms, written, iov, nr_segs);
 737 }
 738
 739 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 740 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 741                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 742 {
 743         struct cifsInodeInfo *cifsi;
 744         int rc;
 745
 746         cifsi = CIFS_I(inode);
 747
 748         /* if file already sparse don't bother setting sparse again */
 749         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 750                 return true; /* already sparse */
 751
 752         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 753                 return true; /* already not sparse */
 754
 755         /*
 756          * Can't check for sparse support on share the usual way via the
 757          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 758          * since Samba server doesn't set the flag on the share, yet
 759          * supports the set sparse FSCTL and returns sparse correctly
 760          * in the file attributes. If we fail setting sparse though we
 761          * mark that server does not support sparse files for this share
 762          * to avoid repeatedly sending the unsupported fsctl to server
 763          * if the file is repeatedly extended.
 764          */
 765         if (tcon->broken_sparse_sup)
 766                 return false;
 767
 768         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 769                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 770                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 771         if (rc) {
 772                 tcon->broken_sparse_sup = true;
 773                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 774                 return false;
 775         }
 776
 777         if (setsparse)
 778                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 779         else
 780                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 781
 782         return true;
 783 }
 784
 785 static int
 786 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 787                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 788 {
 789         __le64 eof = cpu_to_le64(size);
 790         struct inode *inode;
 791
 792         /*
 793          * If extending file more than one page make sparse. Many Linux fs
 794          * make files sparse by default when extending via ftruncate
 795          */
 796         inode = d_inode(cfile->dentry);
 797
 798         if (!set_alloc && (size > inode->i_size + 8192)) {
 799                 __u8 set_sparse = 1;
 800
 801                 /* whether set sparse succeeds or not, extend the file */
 802                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 803         }
 804
 805         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 806                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 807 }
 808
 809 #ifdef CONFIG_CIFS_SMB311
 810 static int
 811 smb2_duplicate_extents(const unsigned int xid,
 812                         struct cifsFileInfo *srcfile,
 813                         struct cifsFileInfo *trgtfile, u64 src_off,
 814                         u64 len, u64 dest_off)
 815 {
 816         int rc;
 817         unsigned int ret_data_len;
 818         char *retbuf = NULL;
 819         struct duplicate_extents_to_file dup_ext_buf;
 820         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 821
 822         /* server fileays advertise duplicate extent support with this flag */
 823         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 824              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 825                 return -EOPNOTSUPP;
 826
 827         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 828         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 829         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 830         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 831         dup_ext_buf.ByteCount = cpu_to_le64(len);
 832         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 833                 src_off, dest_off, len);
 834
 835         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 836         if (rc)
 837                 goto duplicate_extents_out;
 838
 839         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 840                         trgtfile->fid.volatile_fid,
 841                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 842                         true /* is_fsctl */, (char *)&dup_ext_buf,
 843                         sizeof(struct duplicate_extents_to_file),
 844                         (char **)&retbuf,
 845                         &ret_data_len);
 846
 847         if (ret_data_len > 0)
 848                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 849
 850 duplicate_extents_out:
 851         return rc;
 852 }
 853 #endif /* CONFIG_CIFS_SMB311 */
 854
 855
 856 static int
 857 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 858                    struct cifsFileInfo *cfile)
 859 {
 860         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 861                             cfile->fid.volatile_fid);
 862 }
 863
 864 static int
 865 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 866                      const char *path, struct cifs_sb_info *cifs_sb,
 867                      struct cifs_fid *fid, __u16 search_flags,
 868                      struct cifs_search_info *srch_inf)
 869 {
 870         __le16 *utf16_path;
 871         int rc;
 872         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 873         struct cifs_open_parms oparms;
 874
 875         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 876         if (!utf16_path)
 877                 return -ENOMEM;
 878
 879         oparms.tcon = tcon;
 880         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 881         oparms.disposition = FILE_OPEN;
 882         oparms.create_options = 0;
 883         oparms.fid = fid;
 884         oparms.reconnect = false;
 885
 886         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 887         kfree(utf16_path);
 888         if (rc) {
 889                 cifs_dbg(VFS, "open dir failed\n");
 890                 return rc;
 891         }
 892
 893         srch_inf->entries_in_buffer = 0;
 894         srch_inf->index_of_last_entry = 0;
 895
 896         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 897                                   fid->volatile_fid, 0, srch_inf);
 898         if (rc) {
 899                 cifs_dbg(VFS, "query directory failed\n");
 900                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 901         }
 902         return rc;
 903 }
 904
 905 static int
 906 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 907                     struct cifs_fid *fid, __u16 search_flags,
 908                     struct cifs_search_info *srch_inf)
 909 {
 910         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 911                                     fid->volatile_fid, 0, srch_inf);
 912 }
 913
 914 static int
 915 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 916                struct cifs_fid *fid)
 917 {
 918         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 919 }
 920
 921 /*
 922 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 923 * the number of credits and return true. Otherwise - return false.
 924 */
 925 static bool
 926 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 927 {
 928         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 929
 930         if (hdr->Status != STATUS_PENDING)
 931                 return false;
 932
 933         if (!length) {
 934                 spin_lock(&server->req_lock);
 935                 server->credits += le16_to_cpu(hdr->CreditRequest);
 936                 spin_unlock(&server->req_lock);
 937                 wake_up(&server->request_q);
 938         }
 939
 940         return true;
 941 }
 942
 943 static int
 944 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 945                      struct cifsInodeInfo *cinode)
 946 {
 947         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 948                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 949                                         smb2_get_lease_state(cinode));
 950
 951         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 952                                  fid->volatile_fid,
 953                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 954 }
 955
 956 static int
 957 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 958              struct kstatfs *buf)
 959 {
 960         int rc;
 961         __le16 srch_path = 0; /* Null - open root of share */
 962         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 963         struct cifs_open_parms oparms;
 964         struct cifs_fid fid;
 965
 966         oparms.tcon = tcon;
 967         oparms.desired_access = FILE_READ_ATTRIBUTES;
 968         oparms.disposition = FILE_OPEN;
 969         oparms.create_options = 0;
 970         oparms.fid = &fid;
 971         oparms.reconnect = false;
 972
 973         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 974         if (rc)
 975                 return rc;
 976         buf->f_type = SMB2_MAGIC_NUMBER;
 977         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 978                            buf);
 979         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 980         return rc;
 981 }
 982
 983 static bool
 984 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 985 {
 986         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 987                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 988 }
 989
 990 static int
 991 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 992                __u64 length, __u32 type, int lock, int unlock, bool wait)
 993 {
 994         if (unlock && !lock)
 995                 type = SMB2_LOCKFLAG_UNLOCK;
 996         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 997                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 998                          current->tgid, length, offset, type, wait);
 999 }
1000
1001 static void
1002 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1003 {
1004         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1005 }
1006
1007 static void
1008 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1009 {
1010         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1011 }
1012
1013 static void
1014 smb2_new_lease_key(struct cifs_fid *fid)
1015 {
1016         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1017 }
1018
1019 static int
1020 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1021                    const char *full_path, char **target_path,
1022                    struct cifs_sb_info *cifs_sb)
1023 {
1024         int rc;
1025         __le16 *utf16_path;
1026         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1027         struct cifs_open_parms oparms;
1028         struct cifs_fid fid;
1029         struct smb2_err_rsp *err_buf = NULL;
1030         struct smb2_symlink_err_rsp *symlink;
1031         unsigned int sub_len, sub_offset;
1032
1033         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1034
1035         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1036         if (!utf16_path)
1037                 return -ENOMEM;
1038
1039         oparms.tcon = tcon;
1040         oparms.desired_access = FILE_READ_ATTRIBUTES;
1041         oparms.disposition = FILE_OPEN;
1042         oparms.create_options = 0;
1043         oparms.fid = &fid;
1044         oparms.reconnect = false;
1045
1046         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1047
1048         if (!rc || !err_buf) {
1049                 kfree(utf16_path);
1050                 return -ENOENT;
1051         }
1052         /* open must fail on symlink - reset rc */
1053         rc = 0;
1054         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1055         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1056         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1057         *target_path = cifs_strndup_from_utf16(
1058                                 (char *)symlink->PathBuffer + sub_offset,
1059                                 sub_len, true, cifs_sb->local_nls);
1060         if (!(*target_path)) {
1061                 kfree(utf16_path);
1062                 return -ENOMEM;
1063         }
1064         convert_delimiter(*target_path, '/');
1065         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1066         kfree(utf16_path);
1067         return rc;
1068 }
1069
1070 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1071                             loff_t offset, loff_t len, bool keep_size)
1072 {
1073         struct inode *inode;
1074         struct cifsInodeInfo *cifsi;
1075         struct cifsFileInfo *cfile = file->private_data;
1076         struct file_zero_data_information fsctl_buf;
1077         long rc;
1078         unsigned int xid;
1079
1080         xid = get_xid();
1081
1082         inode = d_inode(cfile->dentry);
1083         cifsi = CIFS_I(inode);
1084
1085         /* if file not oplocked can't be sure whether asking to extend size */
1086         if (!CIFS_CACHE_READ(cifsi))
1087                 if (keep_size == false)
1088                         return -EOPNOTSUPP;
1089
1090         /*
1091          * Must check if file sparse since fallocate -z (zero range) assumes
1092          * non-sparse allocation
1093          */
1094         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1095                 return -EOPNOTSUPP;
1096
1097         /*
1098          * need to make sure we are not asked to extend the file since the SMB3
1099          * fsctl does not change the file size. In the future we could change
1100          * this to zero the first part of the range then set the file size
1101          * which for a non sparse file would zero the newly extended range
1102          */
1103         if (keep_size == false)
1104                 if (i_size_read(inode) < offset + len)
1105                         return -EOPNOTSUPP;
1106
1107         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1108
1109         fsctl_buf.FileOffset = cpu_to_le64(offset);
1110         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1111
1112         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1113                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1114                         true /* is_fctl */, (char *)&fsctl_buf,
1115                         sizeof(struct file_zero_data_information), NULL, NULL);
1116         free_xid(xid);
1117         return rc;
1118 }
1119
1120 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1121                             loff_t offset, loff_t len)
1122 {
1123         struct inode *inode;
1124         struct cifsInodeInfo *cifsi;
1125         struct cifsFileInfo *cfile = file->private_data;
1126         struct file_zero_data_information fsctl_buf;
1127         long rc;
1128         unsigned int xid;
1129         __u8 set_sparse = 1;
1130
1131         xid = get_xid();
1132
1133         inode = d_inode(cfile->dentry);
1134         cifsi = CIFS_I(inode);
1135
1136         /* Need to make file sparse, if not already, before freeing range. */
1137         /* Consider adding equivalent for compressed since it could also work */
1138         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1139                 return -EOPNOTSUPP;
1140
1141         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1142
1143         fsctl_buf.FileOffset = cpu_to_le64(offset);
1144         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1145
1146         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1147                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1148                         true /* is_fctl */, (char *)&fsctl_buf,
1149                         sizeof(struct file_zero_data_information), NULL, NULL);
1150         free_xid(xid);
1151         return rc;
1152 }
1153
1154 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1155                             loff_t off, loff_t len, bool keep_size)
1156 {
1157         struct inode *inode;
1158         struct cifsInodeInfo *cifsi;
1159         struct cifsFileInfo *cfile = file->private_data;
1160         long rc = -EOPNOTSUPP;
1161         unsigned int xid;
1162
1163         xid = get_xid();
1164
1165         inode = d_inode(cfile->dentry);
1166         cifsi = CIFS_I(inode);
1167
1168         /* if file not oplocked can't be sure whether asking to extend size */
1169         if (!CIFS_CACHE_READ(cifsi))
1170                 if (keep_size == false)
1171                         return -EOPNOTSUPP;
1172
1173         /*
1174          * Files are non-sparse by default so falloc may be a no-op
1175          * Must check if file sparse. If not sparse, and not extending
1176          * then no need to do anything since file already allocated
1177          */
1178         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1179                 if (keep_size == true)
1180                         return 0;
1181                 /* check if extending file */
1182                 else if (i_size_read(inode) >= off + len)
1183                         /* not extending file and already not sparse */
1184                         return 0;
1185                 /* BB: in future add else clause to extend file */
1186                 else
1187                         return -EOPNOTSUPP;
1188         }
1189
1190         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1191                 /*
1192                  * Check if falloc starts within first few pages of file
1193                  * and ends within a few pages of the end of file to
1194                  * ensure that most of file is being forced to be
1195                  * fallocated now. If so then setting whole file sparse
1196                  * ie potentially making a few extra pages at the beginning
1197                  * or end of the file non-sparse via set_sparse is harmless.
1198                  */
1199                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1200                         return -EOPNOTSUPP;
1201
1202                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1203         }
1204         /* BB: else ... in future add code to extend file and set sparse */
1205
1206
1207         free_xid(xid);
1208         return rc;
1209 }
1210
1211
1212 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1213                            loff_t off, loff_t len)
1214 {
1215         /* KEEP_SIZE already checked for by do_fallocate */
1216         if (mode & FALLOC_FL_PUNCH_HOLE)
1217                 return smb3_punch_hole(file, tcon, off, len);
1218         else if (mode & FALLOC_FL_ZERO_RANGE) {
1219                 if (mode & FALLOC_FL_KEEP_SIZE)
1220                         return smb3_zero_range(file, tcon, off, len, true);
1221                 return smb3_zero_range(file, tcon, off, len, false);
1222         } else if (mode == FALLOC_FL_KEEP_SIZE)
1223                 return smb3_simple_falloc(file, tcon, off, len, true);
1224         else if (mode == 0)
1225                 return smb3_simple_falloc(file, tcon, off, len, false);
1226
1227         return -EOPNOTSUPP;
1228 }
1229
1230 static void
1231 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1232                         struct cifsInodeInfo *cinode, bool set_level2)
1233 {
1234         if (set_level2)
1235                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1236                                                 0, NULL);
1237         else
1238                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1239 }
1240
1241 static void
1242 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1243                       unsigned int epoch, bool *purge_cache)
1244 {
1245         oplock &= 0xFF;
1246         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1247                 return;
1248         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1249                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1250                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1251                          &cinode->vfs_inode);
1252         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1253                 cinode->oplock = CIFS_CACHE_RW_FLG;
1254                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1255                          &cinode->vfs_inode);
1256         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1257                 cinode->oplock = CIFS_CACHE_READ_FLG;
1258                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1259                          &cinode->vfs_inode);
1260         } else
1261                 cinode->oplock = 0;
1262 }
1263
1264 static void
1265 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1266                        unsigned int epoch, bool *purge_cache)
1267 {
1268         char message[5] = {0};
1269
1270         oplock &= 0xFF;
1271         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1272                 return;
1273
1274         cinode->oplock = 0;
1275         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1276                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1277                 strcat(message, "R");
1278         }
1279         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1280                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1281                 strcat(message, "H");
1282         }
1283         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1284                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1285                 strcat(message, "W");
1286         }
1287         if (!cinode->oplock)
1288                 strcat(message, "None");
1289         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1290                  &cinode->vfs_inode);
1291 }
1292
1293 static void
1294 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1295                       unsigned int epoch, bool *purge_cache)
1296 {
1297         unsigned int old_oplock = cinode->oplock;
1298
1299         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1300
1301         if (purge_cache) {
1302                 *purge_cache = false;
1303                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1304                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1305                             (epoch - cinode->epoch > 0))
1306                                 *purge_cache = true;
1307                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1308                                  (epoch - cinode->epoch > 1))
1309                                 *purge_cache = true;
1310                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1311                                  (epoch - cinode->epoch > 1))
1312                                 *purge_cache = true;
1313                         else if (cinode->oplock == 0 &&
1314                                  (epoch - cinode->epoch > 0))
1315                                 *purge_cache = true;
1316                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1317                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1318                             (epoch - cinode->epoch > 0))
1319                                 *purge_cache = true;
1320                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1321                                  (epoch - cinode->epoch > 1))
1322                                 *purge_cache = true;
1323                 }
1324                 cinode->epoch = epoch;
1325         }
1326 }
1327
1328 static bool
1329 smb2_is_read_op(__u32 oplock)
1330 {
1331         return oplock == SMB2_OPLOCK_LEVEL_II;
1332 }
1333
1334 static bool
1335 smb21_is_read_op(__u32 oplock)
1336 {
1337         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1338                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1339 }
1340
1341 static __le32
1342 map_oplock_to_lease(u8 oplock)
1343 {
1344         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1345                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1346         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1347                 return SMB2_LEASE_READ_CACHING;
1348         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1349                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1350                        SMB2_LEASE_WRITE_CACHING;
1351         return 0;
1352 }
1353
1354 static char *
1355 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1356 {
1357         struct create_lease *buf;
1358
1359         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1360         if (!buf)
1361                 return NULL;
1362
1363         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1364         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1365         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1366
1367         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1368                                         (struct create_lease, lcontext));
1369         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1370         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1371                                 (struct create_lease, Name));
1372         buf->ccontext.NameLength = cpu_to_le16(4);
1373         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1374         buf->Name[0] = 'R';
1375         buf->Name[1] = 'q';
1376         buf->Name[2] = 'L';
1377         buf->Name[3] = 's';
1378         return (char *)buf;
1379 }
1380
1381 static char *
1382 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1383 {
1384         struct create_lease_v2 *buf;
1385
1386         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1387         if (!buf)
1388                 return NULL;
1389
1390         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1391         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1392         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1393
1394         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1395                                         (struct create_lease_v2, lcontext));
1396         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1397         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1398                                 (struct create_lease_v2, Name));
1399         buf->ccontext.NameLength = cpu_to_le16(4);
1400         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1401         buf->Name[0] = 'R';
1402         buf->Name[1] = 'q';
1403         buf->Name[2] = 'L';
1404         buf->Name[3] = 's';
1405         return (char *)buf;
1406 }
1407
1408 static __u8
1409 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1410 {
1411         struct create_lease *lc = (struct create_lease *)buf;
1412
1413         *epoch = 0; /* not used */
1414         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1415                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1416         return le32_to_cpu(lc->lcontext.LeaseState);
1417 }
1418
1419 static __u8
1420 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1421 {
1422         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1423
1424         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1425         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1426                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1427         return le32_to_cpu(lc->lcontext.LeaseState);
1428 }
1429
1430 static unsigned int
1431 smb2_wp_retry_size(struct inode *inode)
1432 {
1433         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1434                      SMB2_MAX_BUFFER_SIZE);
1435 }
1436
1437 static bool
1438 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1439 {
1440         return !cfile->invalidHandle;
1441 }
1442
1443 struct smb_version_operations smb20_operations = {
1444         .compare_fids = smb2_compare_fids,
1445         .setup_request = smb2_setup_request,
1446         .setup_async_request = smb2_setup_async_request,
1447         .check_receive = smb2_check_receive,
1448         .add_credits = smb2_add_credits,
1449         .set_credits = smb2_set_credits,
1450         .get_credits_field = smb2_get_credits_field,
1451         .get_credits = smb2_get_credits,
1452         .wait_mtu_credits = cifs_wait_mtu_credits,
1453         .get_next_mid = smb2_get_next_mid,
1454         .read_data_offset = smb2_read_data_offset,
1455         .read_data_length = smb2_read_data_length,
1456         .map_error = map_smb2_to_linux_error,
1457         .find_mid = smb2_find_mid,
1458         .check_message = smb2_check_message,
1459         .dump_detail = smb2_dump_detail,
1460         .clear_stats = smb2_clear_stats,
1461         .print_stats = smb2_print_stats,
1462         .is_oplock_break = smb2_is_valid_oplock_break,
1463         .downgrade_oplock = smb2_downgrade_oplock,
1464         .need_neg = smb2_need_neg,
1465         .negotiate = smb2_negotiate,
1466         .negotiate_wsize = smb2_negotiate_wsize,
1467         .negotiate_rsize = smb2_negotiate_rsize,
1468         .sess_setup = SMB2_sess_setup,
1469         .logoff = SMB2_logoff,
1470         .tree_connect = SMB2_tcon,
1471         .tree_disconnect = SMB2_tdis,
1472         .qfs_tcon = smb2_qfs_tcon,
1473         .is_path_accessible = smb2_is_path_accessible,
1474         .can_echo = smb2_can_echo,
1475         .echo = SMB2_echo,
1476         .query_path_info = smb2_query_path_info,
1477         .get_srv_inum = smb2_get_srv_inum,
1478         .query_file_info = smb2_query_file_info,
1479         .set_path_size = smb2_set_path_size,
1480         .set_file_size = smb2_set_file_size,
1481         .set_file_info = smb2_set_file_info,
1482         .set_compression = smb2_set_compression,
1483         .mkdir = smb2_mkdir,
1484         .mkdir_setinfo = smb2_mkdir_setinfo,
1485         .rmdir = smb2_rmdir,
1486         .unlink = smb2_unlink,
1487         .rename = smb2_rename_path,
1488         .create_hardlink = smb2_create_hardlink,
1489         .query_symlink = smb2_query_symlink,
1490         .open = smb2_open_file,
1491         .set_fid = smb2_set_fid,
1492         .close = smb2_close_file,
1493         .flush = smb2_flush_file,
1494         .async_readv = smb2_async_readv,
1495         .async_writev = smb2_async_writev,
1496         .sync_read = smb2_sync_read,
1497         .sync_write = smb2_sync_write,
1498         .query_dir_first = smb2_query_dir_first,
1499         .query_dir_next = smb2_query_dir_next,
1500         .close_dir = smb2_close_dir,
1501         .calc_smb_size = smb2_calc_size,
1502         .is_status_pending = smb2_is_status_pending,
1503         .oplock_response = smb2_oplock_response,
1504         .queryfs = smb2_queryfs,
1505         .mand_lock = smb2_mand_lock,
1506         .mand_unlock_range = smb2_unlock_range,
1507         .push_mand_locks = smb2_push_mandatory_locks,
1508         .get_lease_key = smb2_get_lease_key,
1509         .set_lease_key = smb2_set_lease_key,
1510         .new_lease_key = smb2_new_lease_key,
1511         .calc_signature = smb2_calc_signature,
1512         .is_read_op = smb2_is_read_op,
1513         .set_oplock_level = smb2_set_oplock_level,
1514         .create_lease_buf = smb2_create_lease_buf,
1515         .parse_lease_buf = smb2_parse_lease_buf,
1516         .clone_range = smb2_clone_range,
1517         .wp_retry_size = smb2_wp_retry_size,
1518         .dir_needs_close = smb2_dir_needs_close,
1519 };
1520
1521 struct smb_version_operations smb21_operations = {
1522         .compare_fids = smb2_compare_fids,
1523         .setup_request = smb2_setup_request,
1524         .setup_async_request = smb2_setup_async_request,
1525         .check_receive = smb2_check_receive,
1526         .add_credits = smb2_add_credits,
1527         .set_credits = smb2_set_credits,
1528         .get_credits_field = smb2_get_credits_field,
1529         .get_credits = smb2_get_credits,
1530         .wait_mtu_credits = smb2_wait_mtu_credits,
1531         .get_next_mid = smb2_get_next_mid,
1532         .read_data_offset = smb2_read_data_offset,
1533         .read_data_length = smb2_read_data_length,
1534         .map_error = map_smb2_to_linux_error,
1535         .find_mid = smb2_find_mid,
1536         .check_message = smb2_check_message,
1537         .dump_detail = smb2_dump_detail,
1538         .clear_stats = smb2_clear_stats,
1539         .print_stats = smb2_print_stats,
1540         .is_oplock_break = smb2_is_valid_oplock_break,
1541         .downgrade_oplock = smb2_downgrade_oplock,
1542         .need_neg = smb2_need_neg,
1543         .negotiate = smb2_negotiate,
1544         .negotiate_wsize = smb2_negotiate_wsize,
1545         .negotiate_rsize = smb2_negotiate_rsize,
1546         .sess_setup = SMB2_sess_setup,
1547         .logoff = SMB2_logoff,
1548         .tree_connect = SMB2_tcon,
1549         .tree_disconnect = SMB2_tdis,
1550         .qfs_tcon = smb2_qfs_tcon,
1551         .is_path_accessible = smb2_is_path_accessible,
1552         .can_echo = smb2_can_echo,
1553         .echo = SMB2_echo,
1554         .query_path_info = smb2_query_path_info,
1555         .get_srv_inum = smb2_get_srv_inum,
1556         .query_file_info = smb2_query_file_info,
1557         .set_path_size = smb2_set_path_size,
1558         .set_file_size = smb2_set_file_size,
1559         .set_file_info = smb2_set_file_info,
1560         .set_compression = smb2_set_compression,
1561         .mkdir = smb2_mkdir,
1562         .mkdir_setinfo = smb2_mkdir_setinfo,
1563         .rmdir = smb2_rmdir,
1564         .unlink = smb2_unlink,
1565         .rename = smb2_rename_path,
1566         .create_hardlink = smb2_create_hardlink,
1567         .query_symlink = smb2_query_symlink,
1568         .query_mf_symlink = smb3_query_mf_symlink,
1569         .create_mf_symlink = smb3_create_mf_symlink,
1570         .open = smb2_open_file,
1571         .set_fid = smb2_set_fid,
1572         .close = smb2_close_file,
1573         .flush = smb2_flush_file,
1574         .async_readv = smb2_async_readv,
1575         .async_writev = smb2_async_writev,
1576         .sync_read = smb2_sync_read,
1577         .sync_write = smb2_sync_write,
1578         .query_dir_first = smb2_query_dir_first,
1579         .query_dir_next = smb2_query_dir_next,
1580         .close_dir = smb2_close_dir,
1581         .calc_smb_size = smb2_calc_size,
1582         .is_status_pending = smb2_is_status_pending,
1583         .oplock_response = smb2_oplock_response,
1584         .queryfs = smb2_queryfs,
1585         .mand_lock = smb2_mand_lock,
1586         .mand_unlock_range = smb2_unlock_range,
1587         .push_mand_locks = smb2_push_mandatory_locks,
1588         .get_lease_key = smb2_get_lease_key,
1589         .set_lease_key = smb2_set_lease_key,
1590         .new_lease_key = smb2_new_lease_key,
1591         .calc_signature = smb2_calc_signature,
1592         .is_read_op = smb21_is_read_op,
1593         .set_oplock_level = smb21_set_oplock_level,
1594         .create_lease_buf = smb2_create_lease_buf,
1595         .parse_lease_buf = smb2_parse_lease_buf,
1596         .clone_range = smb2_clone_range,
1597         .wp_retry_size = smb2_wp_retry_size,
1598         .dir_needs_close = smb2_dir_needs_close,
1599 };
1600
1601 struct smb_version_operations smb30_operations = {
1602         .compare_fids = smb2_compare_fids,
1603         .setup_request = smb2_setup_request,
1604         .setup_async_request = smb2_setup_async_request,
1605         .check_receive = smb2_check_receive,
1606         .add_credits = smb2_add_credits,
1607         .set_credits = smb2_set_credits,
1608         .get_credits_field = smb2_get_credits_field,
1609         .get_credits = smb2_get_credits,
1610         .wait_mtu_credits = smb2_wait_mtu_credits,
1611         .get_next_mid = smb2_get_next_mid,
1612         .read_data_offset = smb2_read_data_offset,
1613         .read_data_length = smb2_read_data_length,
1614         .map_error = map_smb2_to_linux_error,
1615         .find_mid = smb2_find_mid,
1616         .check_message = smb2_check_message,
1617         .dump_detail = smb2_dump_detail,
1618         .clear_stats = smb2_clear_stats,
1619         .print_stats = smb2_print_stats,
1620         .dump_share_caps = smb2_dump_share_caps,
1621         .is_oplock_break = smb2_is_valid_oplock_break,
1622         .downgrade_oplock = smb2_downgrade_oplock,
1623         .need_neg = smb2_need_neg,
1624         .negotiate = smb2_negotiate,
1625         .negotiate_wsize = smb2_negotiate_wsize,
1626         .negotiate_rsize = smb2_negotiate_rsize,
1627         .sess_setup = SMB2_sess_setup,
1628         .logoff = SMB2_logoff,
1629         .tree_connect = SMB2_tcon,
1630         .tree_disconnect = SMB2_tdis,
1631         .qfs_tcon = smb3_qfs_tcon,
1632         .is_path_accessible = smb2_is_path_accessible,
1633         .can_echo = smb2_can_echo,
1634         .echo = SMB2_echo,
1635         .query_path_info = smb2_query_path_info,
1636         .get_srv_inum = smb2_get_srv_inum,
1637         .query_file_info = smb2_query_file_info,
1638         .set_path_size = smb2_set_path_size,
1639         .set_file_size = smb2_set_file_size,
1640         .set_file_info = smb2_set_file_info,
1641         .set_compression = smb2_set_compression,
1642         .mkdir = smb2_mkdir,
1643         .mkdir_setinfo = smb2_mkdir_setinfo,
1644         .rmdir = smb2_rmdir,
1645         .unlink = smb2_unlink,
1646         .rename = smb2_rename_path,
1647         .create_hardlink = smb2_create_hardlink,
1648         .query_symlink = smb2_query_symlink,
1649         .query_mf_symlink = smb3_query_mf_symlink,
1650         .create_mf_symlink = smb3_create_mf_symlink,
1651         .open = smb2_open_file,
1652         .set_fid = smb2_set_fid,
1653         .close = smb2_close_file,
1654         .flush = smb2_flush_file,
1655         .async_readv = smb2_async_readv,
1656         .async_writev = smb2_async_writev,
1657         .sync_read = smb2_sync_read,
1658         .sync_write = smb2_sync_write,
1659         .query_dir_first = smb2_query_dir_first,
1660         .query_dir_next = smb2_query_dir_next,
1661         .close_dir = smb2_close_dir,
1662         .calc_smb_size = smb2_calc_size,
1663         .is_status_pending = smb2_is_status_pending,
1664         .oplock_response = smb2_oplock_response,
1665         .queryfs = smb2_queryfs,
1666         .mand_lock = smb2_mand_lock,
1667         .mand_unlock_range = smb2_unlock_range,
1668         .push_mand_locks = smb2_push_mandatory_locks,
1669         .get_lease_key = smb2_get_lease_key,
1670         .set_lease_key = smb2_set_lease_key,
1671         .new_lease_key = smb2_new_lease_key,
1672         .generate_signingkey = generate_smb3signingkey,
1673         .calc_signature = smb3_calc_signature,
1674         .is_read_op = smb21_is_read_op,
1675         .set_oplock_level = smb3_set_oplock_level,
1676         .create_lease_buf = smb3_create_lease_buf,
1677         .parse_lease_buf = smb3_parse_lease_buf,
1678         .clone_range = smb2_clone_range,
1679         .validate_negotiate = smb3_validate_negotiate,
1680         .wp_retry_size = smb2_wp_retry_size,
1681         .dir_needs_close = smb2_dir_needs_close,
1682         .fallocate = smb3_fallocate,
1683 };
1684
1685 #ifdef CONFIG_CIFS_SMB311
1686 struct smb_version_operations smb311_operations = {
1687         .compare_fids = smb2_compare_fids,
1688         .setup_request = smb2_setup_request,
1689         .setup_async_request = smb2_setup_async_request,
1690         .check_receive = smb2_check_receive,
1691         .add_credits = smb2_add_credits,
1692         .set_credits = smb2_set_credits,
1693         .get_credits_field = smb2_get_credits_field,
1694         .get_credits = smb2_get_credits,
1695         .wait_mtu_credits = smb2_wait_mtu_credits,
1696         .get_next_mid = smb2_get_next_mid,
1697         .read_data_offset = smb2_read_data_offset,
1698         .read_data_length = smb2_read_data_length,
1699         .map_error = map_smb2_to_linux_error,
1700         .find_mid = smb2_find_mid,
1701         .check_message = smb2_check_message,
1702         .dump_detail = smb2_dump_detail,
1703         .clear_stats = smb2_clear_stats,
1704         .print_stats = smb2_print_stats,
1705         .dump_share_caps = smb2_dump_share_caps,
1706         .is_oplock_break = smb2_is_valid_oplock_break,
1707         .downgrade_oplock = smb2_downgrade_oplock,
1708         .need_neg = smb2_need_neg,
1709         .negotiate = smb2_negotiate,
1710         .negotiate_wsize = smb2_negotiate_wsize,
1711         .negotiate_rsize = smb2_negotiate_rsize,
1712         .sess_setup = SMB2_sess_setup,
1713         .logoff = SMB2_logoff,
1714         .tree_connect = SMB2_tcon,
1715         .tree_disconnect = SMB2_tdis,
1716         .qfs_tcon = smb3_qfs_tcon,
1717         .is_path_accessible = smb2_is_path_accessible,
1718         .can_echo = smb2_can_echo,
1719         .echo = SMB2_echo,
1720         .query_path_info = smb2_query_path_info,
1721         .get_srv_inum = smb2_get_srv_inum,
1722         .query_file_info = smb2_query_file_info,
1723         .set_path_size = smb2_set_path_size,
1724         .set_file_size = smb2_set_file_size,
1725         .set_file_info = smb2_set_file_info,
1726         .set_compression = smb2_set_compression,
1727         .mkdir = smb2_mkdir,
1728         .mkdir_setinfo = smb2_mkdir_setinfo,
1729         .rmdir = smb2_rmdir,
1730         .unlink = smb2_unlink,
1731         .rename = smb2_rename_path,
1732         .create_hardlink = smb2_create_hardlink,
1733         .query_symlink = smb2_query_symlink,
1734         .query_mf_symlink = smb3_query_mf_symlink,
1735         .create_mf_symlink = smb3_create_mf_symlink,
1736         .open = smb2_open_file,
1737         .set_fid = smb2_set_fid,
1738         .close = smb2_close_file,
1739         .flush = smb2_flush_file,
1740         .async_readv = smb2_async_readv,
1741         .async_writev = smb2_async_writev,
1742         .sync_read = smb2_sync_read,
1743         .sync_write = smb2_sync_write,
1744         .query_dir_first = smb2_query_dir_first,
1745         .query_dir_next = smb2_query_dir_next,
1746         .close_dir = smb2_close_dir,
1747         .calc_smb_size = smb2_calc_size,
1748         .is_status_pending = smb2_is_status_pending,
1749         .oplock_response = smb2_oplock_response,
1750         .queryfs = smb2_queryfs,
1751         .mand_lock = smb2_mand_lock,
1752         .mand_unlock_range = smb2_unlock_range,
1753         .push_mand_locks = smb2_push_mandatory_locks,
1754         .get_lease_key = smb2_get_lease_key,
1755         .set_lease_key = smb2_set_lease_key,
1756         .new_lease_key = smb2_new_lease_key,
1757         .generate_signingkey = generate_smb3signingkey,
1758         .calc_signature = smb3_calc_signature,
1759         .is_read_op = smb21_is_read_op,
1760         .set_oplock_level = smb3_set_oplock_level,
1761         .create_lease_buf = smb3_create_lease_buf,
1762         .parse_lease_buf = smb3_parse_lease_buf,
1763         .clone_range = smb2_clone_range,
1764         .duplicate_extents = smb2_duplicate_extents,
1765 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1766         .wp_retry_size = smb2_wp_retry_size,
1767         .dir_needs_close = smb2_dir_needs_close,
1768         .fallocate = smb3_fallocate,
1769 };
1770 #endif /* CIFS_SMB311 */
1771
1772 struct smb_version_values smb20_values = {
1773         .version_string = SMB20_VERSION_STRING,
1774         .protocol_id = SMB20_PROT_ID,
1775         .req_capabilities = 0, /* MBZ */
1776         .large_lock_type = 0,
1777         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1778         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1779         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1780         .header_size = sizeof(struct smb2_hdr),
1781         .max_header_size = MAX_SMB2_HDR_SIZE,
1782         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1783         .lock_cmd = SMB2_LOCK,
1784         .cap_unix = 0,
1785         .cap_nt_find = SMB2_NT_FIND,
1786         .cap_large_files = SMB2_LARGE_FILES,
1787         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1788         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1789         .create_lease_size = sizeof(struct create_lease),
1790 };
1791
1792 struct smb_version_values smb21_values = {
1793         .version_string = SMB21_VERSION_STRING,
1794         .protocol_id = SMB21_PROT_ID,
1795         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1796         .large_lock_type = 0,
1797         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1798         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1799         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1800         .header_size = sizeof(struct smb2_hdr),
1801         .max_header_size = MAX_SMB2_HDR_SIZE,
1802         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1803         .lock_cmd = SMB2_LOCK,
1804         .cap_unix = 0,
1805         .cap_nt_find = SMB2_NT_FIND,
1806         .cap_large_files = SMB2_LARGE_FILES,
1807         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1808         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1809         .create_lease_size = sizeof(struct create_lease),
1810 };
1811
1812 struct smb_version_values smb30_values = {
1813         .version_string = SMB30_VERSION_STRING,
1814         .protocol_id = SMB30_PROT_ID,
1815         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1816         .large_lock_type = 0,
1817         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1818         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1819         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1820         .header_size = sizeof(struct smb2_hdr),
1821         .max_header_size = MAX_SMB2_HDR_SIZE,
1822         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1823         .lock_cmd = SMB2_LOCK,
1824         .cap_unix = 0,
1825         .cap_nt_find = SMB2_NT_FIND,
1826         .cap_large_files = SMB2_LARGE_FILES,
1827         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1828         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1829         .create_lease_size = sizeof(struct create_lease_v2),
1830 };
1831
1832 struct smb_version_values smb302_values = {
1833         .version_string = SMB302_VERSION_STRING,
1834         .protocol_id = SMB302_PROT_ID,
1835         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1836         .large_lock_type = 0,
1837         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1838         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1839         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1840         .header_size = sizeof(struct smb2_hdr),
1841         .max_header_size = MAX_SMB2_HDR_SIZE,
1842         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1843         .lock_cmd = SMB2_LOCK,
1844         .cap_unix = 0,
1845         .cap_nt_find = SMB2_NT_FIND,
1846         .cap_large_files = SMB2_LARGE_FILES,
1847         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1848         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1849         .create_lease_size = sizeof(struct create_lease_v2),
1850 };
1851
1852 #ifdef CONFIG_CIFS_SMB311
1853 struct smb_version_values smb311_values = {
1854         .version_string = SMB311_VERSION_STRING,
1855         .protocol_id = SMB311_PROT_ID,
1856         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1857         .large_lock_type = 0,
1858         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1859         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1860         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1861         .header_size = sizeof(struct smb2_hdr),
1862         .max_header_size = MAX_SMB2_HDR_SIZE,
1863         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1864         .lock_cmd = SMB2_LOCK,
1865         .cap_unix = 0,
1866         .cap_nt_find = SMB2_NT_FIND,
1867         .cap_large_files = SMB2_LARGE_FILES,
1868         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1869         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1870         .create_lease_size = sizeof(struct create_lease_v2),
1871 };
1872 #endif /* SMB311 */