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 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 866                    struct cifsFileInfo *cfile)
 867 {
 868         struct fsctl_set_integrity_information_req integr_info;
 869         char *retbuf = NULL;
 870         unsigned int ret_data_len;
 871
 872         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 873         integr_info.Flags = 0;
 874         integr_info.Reserved = 0;
 875
 876         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 877                         cfile->fid.volatile_fid,
 878                         FSCTL_SET_INTEGRITY_INFORMATION,
 879                         true /* is_fsctl */, (char *)&integr_info,
 880                         sizeof(struct fsctl_set_integrity_information_req),
 881                         (char **)&retbuf,
 882                         &ret_data_len);
 883
 884 }
 885
 886 static int
 887 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 888                      const char *path, struct cifs_sb_info *cifs_sb,
 889                      struct cifs_fid *fid, __u16 search_flags,
 890                      struct cifs_search_info *srch_inf)
 891 {
 892         __le16 *utf16_path;
 893         int rc;
 894         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 895         struct cifs_open_parms oparms;
 896
 897         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 898         if (!utf16_path)
 899                 return -ENOMEM;
 900
 901         oparms.tcon = tcon;
 902         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 903         oparms.disposition = FILE_OPEN;
 904         oparms.create_options = 0;
 905         oparms.fid = fid;
 906         oparms.reconnect = false;
 907
 908         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 909         kfree(utf16_path);
 910         if (rc) {
 911                 cifs_dbg(VFS, "open dir failed\n");
 912                 return rc;
 913         }
 914
 915         srch_inf->entries_in_buffer = 0;
 916         srch_inf->index_of_last_entry = 0;
 917
 918         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 919                                   fid->volatile_fid, 0, srch_inf);
 920         if (rc) {
 921                 cifs_dbg(VFS, "query directory failed\n");
 922                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 923         }
 924         return rc;
 925 }
 926
 927 static int
 928 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 929                     struct cifs_fid *fid, __u16 search_flags,
 930                     struct cifs_search_info *srch_inf)
 931 {
 932         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 933                                     fid->volatile_fid, 0, srch_inf);
 934 }
 935
 936 static int
 937 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 938                struct cifs_fid *fid)
 939 {
 940         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 941 }
 942
 943 /*
 944 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 945 * the number of credits and return true. Otherwise - return false.
 946 */
 947 static bool
 948 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 949 {
 950         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 951
 952         if (hdr->Status != STATUS_PENDING)
 953                 return false;
 954
 955         if (!length) {
 956                 spin_lock(&server->req_lock);
 957                 server->credits += le16_to_cpu(hdr->CreditRequest);
 958                 spin_unlock(&server->req_lock);
 959                 wake_up(&server->request_q);
 960         }
 961
 962         return true;
 963 }
 964
 965 static int
 966 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 967                      struct cifsInodeInfo *cinode)
 968 {
 969         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 970                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 971                                         smb2_get_lease_state(cinode));
 972
 973         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 974                                  fid->volatile_fid,
 975                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 976 }
 977
 978 static int
 979 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 980              struct kstatfs *buf)
 981 {
 982         int rc;
 983         __le16 srch_path = 0; /* Null - open root of share */
 984         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 985         struct cifs_open_parms oparms;
 986         struct cifs_fid fid;
 987
 988         oparms.tcon = tcon;
 989         oparms.desired_access = FILE_READ_ATTRIBUTES;
 990         oparms.disposition = FILE_OPEN;
 991         oparms.create_options = 0;
 992         oparms.fid = &fid;
 993         oparms.reconnect = false;
 994
 995         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 996         if (rc)
 997                 return rc;
 998         buf->f_type = SMB2_MAGIC_NUMBER;
 999         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1000                            buf);
1001         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1002         return rc;
1003 }
1004
1005 static bool
1006 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1007 {
1008         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1009                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1010 }
1011
1012 static int
1013 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1014                __u64 length, __u32 type, int lock, int unlock, bool wait)
1015 {
1016         if (unlock && !lock)
1017                 type = SMB2_LOCKFLAG_UNLOCK;
1018         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1019                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1020                          current->tgid, length, offset, type, wait);
1021 }
1022
1023 static void
1024 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1025 {
1026         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1027 }
1028
1029 static void
1030 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1031 {
1032         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1033 }
1034
1035 static void
1036 smb2_new_lease_key(struct cifs_fid *fid)
1037 {
1038         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1039 }
1040
1041 static int
1042 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1043                    const char *full_path, char **target_path,
1044                    struct cifs_sb_info *cifs_sb)
1045 {
1046         int rc;
1047         __le16 *utf16_path;
1048         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1049         struct cifs_open_parms oparms;
1050         struct cifs_fid fid;
1051         struct smb2_err_rsp *err_buf = NULL;
1052         struct smb2_symlink_err_rsp *symlink;
1053         unsigned int sub_len, sub_offset;
1054
1055         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1056
1057         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1058         if (!utf16_path)
1059                 return -ENOMEM;
1060
1061         oparms.tcon = tcon;
1062         oparms.desired_access = FILE_READ_ATTRIBUTES;
1063         oparms.disposition = FILE_OPEN;
1064         oparms.create_options = 0;
1065         oparms.fid = &fid;
1066         oparms.reconnect = false;
1067
1068         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1069
1070         if (!rc || !err_buf) {
1071                 kfree(utf16_path);
1072                 return -ENOENT;
1073         }
1074         /* open must fail on symlink - reset rc */
1075         rc = 0;
1076         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1077         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1078         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1079         *target_path = cifs_strndup_from_utf16(
1080                                 (char *)symlink->PathBuffer + sub_offset,
1081                                 sub_len, true, cifs_sb->local_nls);
1082         if (!(*target_path)) {
1083                 kfree(utf16_path);
1084                 return -ENOMEM;
1085         }
1086         convert_delimiter(*target_path, '/');
1087         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1088         kfree(utf16_path);
1089         return rc;
1090 }
1091
1092 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1093                             loff_t offset, loff_t len, bool keep_size)
1094 {
1095         struct inode *inode;
1096         struct cifsInodeInfo *cifsi;
1097         struct cifsFileInfo *cfile = file->private_data;
1098         struct file_zero_data_information fsctl_buf;
1099         long rc;
1100         unsigned int xid;
1101
1102         xid = get_xid();
1103
1104         inode = d_inode(cfile->dentry);
1105         cifsi = CIFS_I(inode);
1106
1107         /* if file not oplocked can't be sure whether asking to extend size */
1108         if (!CIFS_CACHE_READ(cifsi))
1109                 if (keep_size == false)
1110                         return -EOPNOTSUPP;
1111
1112         /*
1113          * Must check if file sparse since fallocate -z (zero range) assumes
1114          * non-sparse allocation
1115          */
1116         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1117                 return -EOPNOTSUPP;
1118
1119         /*
1120          * need to make sure we are not asked to extend the file since the SMB3
1121          * fsctl does not change the file size. In the future we could change
1122          * this to zero the first part of the range then set the file size
1123          * which for a non sparse file would zero the newly extended range
1124          */
1125         if (keep_size == false)
1126                 if (i_size_read(inode) < offset + len)
1127                         return -EOPNOTSUPP;
1128
1129         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1130
1131         fsctl_buf.FileOffset = cpu_to_le64(offset);
1132         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1133
1134         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1135                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1136                         true /* is_fctl */, (char *)&fsctl_buf,
1137                         sizeof(struct file_zero_data_information), NULL, NULL);
1138         free_xid(xid);
1139         return rc;
1140 }
1141
1142 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1143                             loff_t offset, loff_t len)
1144 {
1145         struct inode *inode;
1146         struct cifsInodeInfo *cifsi;
1147         struct cifsFileInfo *cfile = file->private_data;
1148         struct file_zero_data_information fsctl_buf;
1149         long rc;
1150         unsigned int xid;
1151         __u8 set_sparse = 1;
1152
1153         xid = get_xid();
1154
1155         inode = d_inode(cfile->dentry);
1156         cifsi = CIFS_I(inode);
1157
1158         /* Need to make file sparse, if not already, before freeing range. */
1159         /* Consider adding equivalent for compressed since it could also work */
1160         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1161                 return -EOPNOTSUPP;
1162
1163         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1164
1165         fsctl_buf.FileOffset = cpu_to_le64(offset);
1166         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1167
1168         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1169                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1170                         true /* is_fctl */, (char *)&fsctl_buf,
1171                         sizeof(struct file_zero_data_information), NULL, NULL);
1172         free_xid(xid);
1173         return rc;
1174 }
1175
1176 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1177                             loff_t off, loff_t len, bool keep_size)
1178 {
1179         struct inode *inode;
1180         struct cifsInodeInfo *cifsi;
1181         struct cifsFileInfo *cfile = file->private_data;
1182         long rc = -EOPNOTSUPP;
1183         unsigned int xid;
1184
1185         xid = get_xid();
1186
1187         inode = d_inode(cfile->dentry);
1188         cifsi = CIFS_I(inode);
1189
1190         /* if file not oplocked can't be sure whether asking to extend size */
1191         if (!CIFS_CACHE_READ(cifsi))
1192                 if (keep_size == false)
1193                         return -EOPNOTSUPP;
1194
1195         /*
1196          * Files are non-sparse by default so falloc may be a no-op
1197          * Must check if file sparse. If not sparse, and not extending
1198          * then no need to do anything since file already allocated
1199          */
1200         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1201                 if (keep_size == true)
1202                         return 0;
1203                 /* check if extending file */
1204                 else if (i_size_read(inode) >= off + len)
1205                         /* not extending file and already not sparse */
1206                         return 0;
1207                 /* BB: in future add else clause to extend file */
1208                 else
1209                         return -EOPNOTSUPP;
1210         }
1211
1212         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1213                 /*
1214                  * Check if falloc starts within first few pages of file
1215                  * and ends within a few pages of the end of file to
1216                  * ensure that most of file is being forced to be
1217                  * fallocated now. If so then setting whole file sparse
1218                  * ie potentially making a few extra pages at the beginning
1219                  * or end of the file non-sparse via set_sparse is harmless.
1220                  */
1221                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1222                         return -EOPNOTSUPP;
1223
1224                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1225         }
1226         /* BB: else ... in future add code to extend file and set sparse */
1227
1228
1229         free_xid(xid);
1230         return rc;
1231 }
1232
1233
1234 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1235                            loff_t off, loff_t len)
1236 {
1237         /* KEEP_SIZE already checked for by do_fallocate */
1238         if (mode & FALLOC_FL_PUNCH_HOLE)
1239                 return smb3_punch_hole(file, tcon, off, len);
1240         else if (mode & FALLOC_FL_ZERO_RANGE) {
1241                 if (mode & FALLOC_FL_KEEP_SIZE)
1242                         return smb3_zero_range(file, tcon, off, len, true);
1243                 return smb3_zero_range(file, tcon, off, len, false);
1244         } else if (mode == FALLOC_FL_KEEP_SIZE)
1245                 return smb3_simple_falloc(file, tcon, off, len, true);
1246         else if (mode == 0)
1247                 return smb3_simple_falloc(file, tcon, off, len, false);
1248
1249         return -EOPNOTSUPP;
1250 }
1251
1252 static void
1253 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1254                         struct cifsInodeInfo *cinode, bool set_level2)
1255 {
1256         if (set_level2)
1257                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1258                                                 0, NULL);
1259         else
1260                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1261 }
1262
1263 static void
1264 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1265                       unsigned int epoch, bool *purge_cache)
1266 {
1267         oplock &= 0xFF;
1268         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1269                 return;
1270         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1271                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1272                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1273                          &cinode->vfs_inode);
1274         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1275                 cinode->oplock = CIFS_CACHE_RW_FLG;
1276                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1277                          &cinode->vfs_inode);
1278         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1279                 cinode->oplock = CIFS_CACHE_READ_FLG;
1280                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1281                          &cinode->vfs_inode);
1282         } else
1283                 cinode->oplock = 0;
1284 }
1285
1286 static void
1287 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1288                        unsigned int epoch, bool *purge_cache)
1289 {
1290         char message[5] = {0};
1291
1292         oplock &= 0xFF;
1293         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1294                 return;
1295
1296         cinode->oplock = 0;
1297         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1298                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1299                 strcat(message, "R");
1300         }
1301         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1302                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1303                 strcat(message, "H");
1304         }
1305         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1306                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1307                 strcat(message, "W");
1308         }
1309         if (!cinode->oplock)
1310                 strcat(message, "None");
1311         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1312                  &cinode->vfs_inode);
1313 }
1314
1315 static void
1316 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1317                       unsigned int epoch, bool *purge_cache)
1318 {
1319         unsigned int old_oplock = cinode->oplock;
1320
1321         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1322
1323         if (purge_cache) {
1324                 *purge_cache = false;
1325                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1326                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1327                             (epoch - cinode->epoch > 0))
1328                                 *purge_cache = true;
1329                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1330                                  (epoch - cinode->epoch > 1))
1331                                 *purge_cache = true;
1332                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1333                                  (epoch - cinode->epoch > 1))
1334                                 *purge_cache = true;
1335                         else if (cinode->oplock == 0 &&
1336                                  (epoch - cinode->epoch > 0))
1337                                 *purge_cache = true;
1338                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1339                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1340                             (epoch - cinode->epoch > 0))
1341                                 *purge_cache = true;
1342                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1343                                  (epoch - cinode->epoch > 1))
1344                                 *purge_cache = true;
1345                 }
1346                 cinode->epoch = epoch;
1347         }
1348 }
1349
1350 static bool
1351 smb2_is_read_op(__u32 oplock)
1352 {
1353         return oplock == SMB2_OPLOCK_LEVEL_II;
1354 }
1355
1356 static bool
1357 smb21_is_read_op(__u32 oplock)
1358 {
1359         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1360                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1361 }
1362
1363 static __le32
1364 map_oplock_to_lease(u8 oplock)
1365 {
1366         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1367                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1368         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1369                 return SMB2_LEASE_READ_CACHING;
1370         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1371                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1372                        SMB2_LEASE_WRITE_CACHING;
1373         return 0;
1374 }
1375
1376 static char *
1377 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1378 {
1379         struct create_lease *buf;
1380
1381         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1382         if (!buf)
1383                 return NULL;
1384
1385         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1386         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1387         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1388
1389         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1390                                         (struct create_lease, lcontext));
1391         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1392         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1393                                 (struct create_lease, Name));
1394         buf->ccontext.NameLength = cpu_to_le16(4);
1395         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1396         buf->Name[0] = 'R';
1397         buf->Name[1] = 'q';
1398         buf->Name[2] = 'L';
1399         buf->Name[3] = 's';
1400         return (char *)buf;
1401 }
1402
1403 static char *
1404 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1405 {
1406         struct create_lease_v2 *buf;
1407
1408         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1409         if (!buf)
1410                 return NULL;
1411
1412         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1413         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1414         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1415
1416         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1417                                         (struct create_lease_v2, lcontext));
1418         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1419         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1420                                 (struct create_lease_v2, Name));
1421         buf->ccontext.NameLength = cpu_to_le16(4);
1422         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1423         buf->Name[0] = 'R';
1424         buf->Name[1] = 'q';
1425         buf->Name[2] = 'L';
1426         buf->Name[3] = 's';
1427         return (char *)buf;
1428 }
1429
1430 static __u8
1431 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1432 {
1433         struct create_lease *lc = (struct create_lease *)buf;
1434
1435         *epoch = 0; /* not used */
1436         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1437                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1438         return le32_to_cpu(lc->lcontext.LeaseState);
1439 }
1440
1441 static __u8
1442 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1443 {
1444         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1445
1446         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1447         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1448                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1449         return le32_to_cpu(lc->lcontext.LeaseState);
1450 }
1451
1452 static unsigned int
1453 smb2_wp_retry_size(struct inode *inode)
1454 {
1455         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1456                      SMB2_MAX_BUFFER_SIZE);
1457 }
1458
1459 static bool
1460 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1461 {
1462         return !cfile->invalidHandle;
1463 }
1464
1465 struct smb_version_operations smb20_operations = {
1466         .compare_fids = smb2_compare_fids,
1467         .setup_request = smb2_setup_request,
1468         .setup_async_request = smb2_setup_async_request,
1469         .check_receive = smb2_check_receive,
1470         .add_credits = smb2_add_credits,
1471         .set_credits = smb2_set_credits,
1472         .get_credits_field = smb2_get_credits_field,
1473         .get_credits = smb2_get_credits,
1474         .wait_mtu_credits = cifs_wait_mtu_credits,
1475         .get_next_mid = smb2_get_next_mid,
1476         .read_data_offset = smb2_read_data_offset,
1477         .read_data_length = smb2_read_data_length,
1478         .map_error = map_smb2_to_linux_error,
1479         .find_mid = smb2_find_mid,
1480         .check_message = smb2_check_message,
1481         .dump_detail = smb2_dump_detail,
1482         .clear_stats = smb2_clear_stats,
1483         .print_stats = smb2_print_stats,
1484         .is_oplock_break = smb2_is_valid_oplock_break,
1485         .downgrade_oplock = smb2_downgrade_oplock,
1486         .need_neg = smb2_need_neg,
1487         .negotiate = smb2_negotiate,
1488         .negotiate_wsize = smb2_negotiate_wsize,
1489         .negotiate_rsize = smb2_negotiate_rsize,
1490         .sess_setup = SMB2_sess_setup,
1491         .logoff = SMB2_logoff,
1492         .tree_connect = SMB2_tcon,
1493         .tree_disconnect = SMB2_tdis,
1494         .qfs_tcon = smb2_qfs_tcon,
1495         .is_path_accessible = smb2_is_path_accessible,
1496         .can_echo = smb2_can_echo,
1497         .echo = SMB2_echo,
1498         .query_path_info = smb2_query_path_info,
1499         .get_srv_inum = smb2_get_srv_inum,
1500         .query_file_info = smb2_query_file_info,
1501         .set_path_size = smb2_set_path_size,
1502         .set_file_size = smb2_set_file_size,
1503         .set_file_info = smb2_set_file_info,
1504         .set_compression = smb2_set_compression,
1505         .mkdir = smb2_mkdir,
1506         .mkdir_setinfo = smb2_mkdir_setinfo,
1507         .rmdir = smb2_rmdir,
1508         .unlink = smb2_unlink,
1509         .rename = smb2_rename_path,
1510         .create_hardlink = smb2_create_hardlink,
1511         .query_symlink = smb2_query_symlink,
1512         .open = smb2_open_file,
1513         .set_fid = smb2_set_fid,
1514         .close = smb2_close_file,
1515         .flush = smb2_flush_file,
1516         .async_readv = smb2_async_readv,
1517         .async_writev = smb2_async_writev,
1518         .sync_read = smb2_sync_read,
1519         .sync_write = smb2_sync_write,
1520         .query_dir_first = smb2_query_dir_first,
1521         .query_dir_next = smb2_query_dir_next,
1522         .close_dir = smb2_close_dir,
1523         .calc_smb_size = smb2_calc_size,
1524         .is_status_pending = smb2_is_status_pending,
1525         .oplock_response = smb2_oplock_response,
1526         .queryfs = smb2_queryfs,
1527         .mand_lock = smb2_mand_lock,
1528         .mand_unlock_range = smb2_unlock_range,
1529         .push_mand_locks = smb2_push_mandatory_locks,
1530         .get_lease_key = smb2_get_lease_key,
1531         .set_lease_key = smb2_set_lease_key,
1532         .new_lease_key = smb2_new_lease_key,
1533         .calc_signature = smb2_calc_signature,
1534         .is_read_op = smb2_is_read_op,
1535         .set_oplock_level = smb2_set_oplock_level,
1536         .create_lease_buf = smb2_create_lease_buf,
1537         .parse_lease_buf = smb2_parse_lease_buf,
1538         .clone_range = smb2_clone_range,
1539         .wp_retry_size = smb2_wp_retry_size,
1540         .dir_needs_close = smb2_dir_needs_close,
1541 };
1542
1543 struct smb_version_operations smb21_operations = {
1544         .compare_fids = smb2_compare_fids,
1545         .setup_request = smb2_setup_request,
1546         .setup_async_request = smb2_setup_async_request,
1547         .check_receive = smb2_check_receive,
1548         .add_credits = smb2_add_credits,
1549         .set_credits = smb2_set_credits,
1550         .get_credits_field = smb2_get_credits_field,
1551         .get_credits = smb2_get_credits,
1552         .wait_mtu_credits = smb2_wait_mtu_credits,
1553         .get_next_mid = smb2_get_next_mid,
1554         .read_data_offset = smb2_read_data_offset,
1555         .read_data_length = smb2_read_data_length,
1556         .map_error = map_smb2_to_linux_error,
1557         .find_mid = smb2_find_mid,
1558         .check_message = smb2_check_message,
1559         .dump_detail = smb2_dump_detail,
1560         .clear_stats = smb2_clear_stats,
1561         .print_stats = smb2_print_stats,
1562         .is_oplock_break = smb2_is_valid_oplock_break,
1563         .downgrade_oplock = smb2_downgrade_oplock,
1564         .need_neg = smb2_need_neg,
1565         .negotiate = smb2_negotiate,
1566         .negotiate_wsize = smb2_negotiate_wsize,
1567         .negotiate_rsize = smb2_negotiate_rsize,
1568         .sess_setup = SMB2_sess_setup,
1569         .logoff = SMB2_logoff,
1570         .tree_connect = SMB2_tcon,
1571         .tree_disconnect = SMB2_tdis,
1572         .qfs_tcon = smb2_qfs_tcon,
1573         .is_path_accessible = smb2_is_path_accessible,
1574         .can_echo = smb2_can_echo,
1575         .echo = SMB2_echo,
1576         .query_path_info = smb2_query_path_info,
1577         .get_srv_inum = smb2_get_srv_inum,
1578         .query_file_info = smb2_query_file_info,
1579         .set_path_size = smb2_set_path_size,
1580         .set_file_size = smb2_set_file_size,
1581         .set_file_info = smb2_set_file_info,
1582         .set_compression = smb2_set_compression,
1583         .mkdir = smb2_mkdir,
1584         .mkdir_setinfo = smb2_mkdir_setinfo,
1585         .rmdir = smb2_rmdir,
1586         .unlink = smb2_unlink,
1587         .rename = smb2_rename_path,
1588         .create_hardlink = smb2_create_hardlink,
1589         .query_symlink = smb2_query_symlink,
1590         .query_mf_symlink = smb3_query_mf_symlink,
1591         .create_mf_symlink = smb3_create_mf_symlink,
1592         .open = smb2_open_file,
1593         .set_fid = smb2_set_fid,
1594         .close = smb2_close_file,
1595         .flush = smb2_flush_file,
1596         .async_readv = smb2_async_readv,
1597         .async_writev = smb2_async_writev,
1598         .sync_read = smb2_sync_read,
1599         .sync_write = smb2_sync_write,
1600         .query_dir_first = smb2_query_dir_first,
1601         .query_dir_next = smb2_query_dir_next,
1602         .close_dir = smb2_close_dir,
1603         .calc_smb_size = smb2_calc_size,
1604         .is_status_pending = smb2_is_status_pending,
1605         .oplock_response = smb2_oplock_response,
1606         .queryfs = smb2_queryfs,
1607         .mand_lock = smb2_mand_lock,
1608         .mand_unlock_range = smb2_unlock_range,
1609         .push_mand_locks = smb2_push_mandatory_locks,
1610         .get_lease_key = smb2_get_lease_key,
1611         .set_lease_key = smb2_set_lease_key,
1612         .new_lease_key = smb2_new_lease_key,
1613         .calc_signature = smb2_calc_signature,
1614         .is_read_op = smb21_is_read_op,
1615         .set_oplock_level = smb21_set_oplock_level,
1616         .create_lease_buf = smb2_create_lease_buf,
1617         .parse_lease_buf = smb2_parse_lease_buf,
1618         .clone_range = smb2_clone_range,
1619         .wp_retry_size = smb2_wp_retry_size,
1620         .dir_needs_close = smb2_dir_needs_close,
1621 };
1622
1623 struct smb_version_operations smb30_operations = {
1624         .compare_fids = smb2_compare_fids,
1625         .setup_request = smb2_setup_request,
1626         .setup_async_request = smb2_setup_async_request,
1627         .check_receive = smb2_check_receive,
1628         .add_credits = smb2_add_credits,
1629         .set_credits = smb2_set_credits,
1630         .get_credits_field = smb2_get_credits_field,
1631         .get_credits = smb2_get_credits,
1632         .wait_mtu_credits = smb2_wait_mtu_credits,
1633         .get_next_mid = smb2_get_next_mid,
1634         .read_data_offset = smb2_read_data_offset,
1635         .read_data_length = smb2_read_data_length,
1636         .map_error = map_smb2_to_linux_error,
1637         .find_mid = smb2_find_mid,
1638         .check_message = smb2_check_message,
1639         .dump_detail = smb2_dump_detail,
1640         .clear_stats = smb2_clear_stats,
1641         .print_stats = smb2_print_stats,
1642         .dump_share_caps = smb2_dump_share_caps,
1643         .is_oplock_break = smb2_is_valid_oplock_break,
1644         .downgrade_oplock = smb2_downgrade_oplock,
1645         .need_neg = smb2_need_neg,
1646         .negotiate = smb2_negotiate,
1647         .negotiate_wsize = smb2_negotiate_wsize,
1648         .negotiate_rsize = smb2_negotiate_rsize,
1649         .sess_setup = SMB2_sess_setup,
1650         .logoff = SMB2_logoff,
1651         .tree_connect = SMB2_tcon,
1652         .tree_disconnect = SMB2_tdis,
1653         .qfs_tcon = smb3_qfs_tcon,
1654         .is_path_accessible = smb2_is_path_accessible,
1655         .can_echo = smb2_can_echo,
1656         .echo = SMB2_echo,
1657         .query_path_info = smb2_query_path_info,
1658         .get_srv_inum = smb2_get_srv_inum,
1659         .query_file_info = smb2_query_file_info,
1660         .set_path_size = smb2_set_path_size,
1661         .set_file_size = smb2_set_file_size,
1662         .set_file_info = smb2_set_file_info,
1663         .set_compression = smb2_set_compression,
1664         .mkdir = smb2_mkdir,
1665         .mkdir_setinfo = smb2_mkdir_setinfo,
1666         .rmdir = smb2_rmdir,
1667         .unlink = smb2_unlink,
1668         .rename = smb2_rename_path,
1669         .create_hardlink = smb2_create_hardlink,
1670         .query_symlink = smb2_query_symlink,
1671         .query_mf_symlink = smb3_query_mf_symlink,
1672         .create_mf_symlink = smb3_create_mf_symlink,
1673         .open = smb2_open_file,
1674         .set_fid = smb2_set_fid,
1675         .close = smb2_close_file,
1676         .flush = smb2_flush_file,
1677         .async_readv = smb2_async_readv,
1678         .async_writev = smb2_async_writev,
1679         .sync_read = smb2_sync_read,
1680         .sync_write = smb2_sync_write,
1681         .query_dir_first = smb2_query_dir_first,
1682         .query_dir_next = smb2_query_dir_next,
1683         .close_dir = smb2_close_dir,
1684         .calc_smb_size = smb2_calc_size,
1685         .is_status_pending = smb2_is_status_pending,
1686         .oplock_response = smb2_oplock_response,
1687         .queryfs = smb2_queryfs,
1688         .mand_lock = smb2_mand_lock,
1689         .mand_unlock_range = smb2_unlock_range,
1690         .push_mand_locks = smb2_push_mandatory_locks,
1691         .get_lease_key = smb2_get_lease_key,
1692         .set_lease_key = smb2_set_lease_key,
1693         .new_lease_key = smb2_new_lease_key,
1694         .generate_signingkey = generate_smb3signingkey,
1695         .calc_signature = smb3_calc_signature,
1696         .set_integrity  = smb3_set_integrity,
1697         .is_read_op = smb21_is_read_op,
1698         .set_oplock_level = smb3_set_oplock_level,
1699         .create_lease_buf = smb3_create_lease_buf,
1700         .parse_lease_buf = smb3_parse_lease_buf,
1701         .clone_range = smb2_clone_range,
1702         .validate_negotiate = smb3_validate_negotiate,
1703         .wp_retry_size = smb2_wp_retry_size,
1704         .dir_needs_close = smb2_dir_needs_close,
1705         .fallocate = smb3_fallocate,
1706 };
1707
1708 #ifdef CONFIG_CIFS_SMB311
1709 struct smb_version_operations smb311_operations = {
1710         .compare_fids = smb2_compare_fids,
1711         .setup_request = smb2_setup_request,
1712         .setup_async_request = smb2_setup_async_request,
1713         .check_receive = smb2_check_receive,
1714         .add_credits = smb2_add_credits,
1715         .set_credits = smb2_set_credits,
1716         .get_credits_field = smb2_get_credits_field,
1717         .get_credits = smb2_get_credits,
1718         .wait_mtu_credits = smb2_wait_mtu_credits,
1719         .get_next_mid = smb2_get_next_mid,
1720         .read_data_offset = smb2_read_data_offset,
1721         .read_data_length = smb2_read_data_length,
1722         .map_error = map_smb2_to_linux_error,
1723         .find_mid = smb2_find_mid,
1724         .check_message = smb2_check_message,
1725         .dump_detail = smb2_dump_detail,
1726         .clear_stats = smb2_clear_stats,
1727         .print_stats = smb2_print_stats,
1728         .dump_share_caps = smb2_dump_share_caps,
1729         .is_oplock_break = smb2_is_valid_oplock_break,
1730         .downgrade_oplock = smb2_downgrade_oplock,
1731         .need_neg = smb2_need_neg,
1732         .negotiate = smb2_negotiate,
1733         .negotiate_wsize = smb2_negotiate_wsize,
1734         .negotiate_rsize = smb2_negotiate_rsize,
1735         .sess_setup = SMB2_sess_setup,
1736         .logoff = SMB2_logoff,
1737         .tree_connect = SMB2_tcon,
1738         .tree_disconnect = SMB2_tdis,
1739         .qfs_tcon = smb3_qfs_tcon,
1740         .is_path_accessible = smb2_is_path_accessible,
1741         .can_echo = smb2_can_echo,
1742         .echo = SMB2_echo,
1743         .query_path_info = smb2_query_path_info,
1744         .get_srv_inum = smb2_get_srv_inum,
1745         .query_file_info = smb2_query_file_info,
1746         .set_path_size = smb2_set_path_size,
1747         .set_file_size = smb2_set_file_size,
1748         .set_file_info = smb2_set_file_info,
1749         .set_compression = smb2_set_compression,
1750         .mkdir = smb2_mkdir,
1751         .mkdir_setinfo = smb2_mkdir_setinfo,
1752         .rmdir = smb2_rmdir,
1753         .unlink = smb2_unlink,
1754         .rename = smb2_rename_path,
1755         .create_hardlink = smb2_create_hardlink,
1756         .query_symlink = smb2_query_symlink,
1757         .query_mf_symlink = smb3_query_mf_symlink,
1758         .create_mf_symlink = smb3_create_mf_symlink,
1759         .open = smb2_open_file,
1760         .set_fid = smb2_set_fid,
1761         .close = smb2_close_file,
1762         .flush = smb2_flush_file,
1763         .async_readv = smb2_async_readv,
1764         .async_writev = smb2_async_writev,
1765         .sync_read = smb2_sync_read,
1766         .sync_write = smb2_sync_write,
1767         .query_dir_first = smb2_query_dir_first,
1768         .query_dir_next = smb2_query_dir_next,
1769         .close_dir = smb2_close_dir,
1770         .calc_smb_size = smb2_calc_size,
1771         .is_status_pending = smb2_is_status_pending,
1772         .oplock_response = smb2_oplock_response,
1773         .queryfs = smb2_queryfs,
1774         .mand_lock = smb2_mand_lock,
1775         .mand_unlock_range = smb2_unlock_range,
1776         .push_mand_locks = smb2_push_mandatory_locks,
1777         .get_lease_key = smb2_get_lease_key,
1778         .set_lease_key = smb2_set_lease_key,
1779         .new_lease_key = smb2_new_lease_key,
1780         .generate_signingkey = generate_smb3signingkey,
1781         .calc_signature = smb3_calc_signature,
1782         .set_integrity  = smb3_set_integrity,
1783         .is_read_op = smb21_is_read_op,
1784         .set_oplock_level = smb3_set_oplock_level,
1785         .create_lease_buf = smb3_create_lease_buf,
1786         .parse_lease_buf = smb3_parse_lease_buf,
1787         .clone_range = smb2_clone_range,
1788         .duplicate_extents = smb2_duplicate_extents,
1789 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1790         .wp_retry_size = smb2_wp_retry_size,
1791         .dir_needs_close = smb2_dir_needs_close,
1792         .fallocate = smb3_fallocate,
1793 };
1794 #endif /* CIFS_SMB311 */
1795
1796 struct smb_version_values smb20_values = {
1797         .version_string = SMB20_VERSION_STRING,
1798         .protocol_id = SMB20_PROT_ID,
1799         .req_capabilities = 0, /* MBZ */
1800         .large_lock_type = 0,
1801         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1802         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1803         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1804         .header_size = sizeof(struct smb2_hdr),
1805         .max_header_size = MAX_SMB2_HDR_SIZE,
1806         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1807         .lock_cmd = SMB2_LOCK,
1808         .cap_unix = 0,
1809         .cap_nt_find = SMB2_NT_FIND,
1810         .cap_large_files = SMB2_LARGE_FILES,
1811         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1812         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1813         .create_lease_size = sizeof(struct create_lease),
1814 };
1815
1816 struct smb_version_values smb21_values = {
1817         .version_string = SMB21_VERSION_STRING,
1818         .protocol_id = SMB21_PROT_ID,
1819         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1820         .large_lock_type = 0,
1821         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1822         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1823         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1824         .header_size = sizeof(struct smb2_hdr),
1825         .max_header_size = MAX_SMB2_HDR_SIZE,
1826         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1827         .lock_cmd = SMB2_LOCK,
1828         .cap_unix = 0,
1829         .cap_nt_find = SMB2_NT_FIND,
1830         .cap_large_files = SMB2_LARGE_FILES,
1831         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1832         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1833         .create_lease_size = sizeof(struct create_lease),
1834 };
1835
1836 struct smb_version_values smb30_values = {
1837         .version_string = SMB30_VERSION_STRING,
1838         .protocol_id = SMB30_PROT_ID,
1839         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1840         .large_lock_type = 0,
1841         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1842         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1843         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1844         .header_size = sizeof(struct smb2_hdr),
1845         .max_header_size = MAX_SMB2_HDR_SIZE,
1846         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1847         .lock_cmd = SMB2_LOCK,
1848         .cap_unix = 0,
1849         .cap_nt_find = SMB2_NT_FIND,
1850         .cap_large_files = SMB2_LARGE_FILES,
1851         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1852         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1853         .create_lease_size = sizeof(struct create_lease_v2),
1854 };
1855
1856 struct smb_version_values smb302_values = {
1857         .version_string = SMB302_VERSION_STRING,
1858         .protocol_id = SMB302_PROT_ID,
1859         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1860         .large_lock_type = 0,
1861         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1862         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1863         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1864         .header_size = sizeof(struct smb2_hdr),
1865         .max_header_size = MAX_SMB2_HDR_SIZE,
1866         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1867         .lock_cmd = SMB2_LOCK,
1868         .cap_unix = 0,
1869         .cap_nt_find = SMB2_NT_FIND,
1870         .cap_large_files = SMB2_LARGE_FILES,
1871         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1872         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1873         .create_lease_size = sizeof(struct create_lease_v2),
1874 };
1875
1876 #ifdef CONFIG_CIFS_SMB311
1877 struct smb_version_values smb311_values = {
1878         .version_string = SMB311_VERSION_STRING,
1879         .protocol_id = SMB311_PROT_ID,
1880         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1881         .large_lock_type = 0,
1882         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1883         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1884         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1885         .header_size = sizeof(struct smb2_hdr),
1886         .max_header_size = MAX_SMB2_HDR_SIZE,
1887         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1888         .lock_cmd = SMB2_LOCK,
1889         .cap_unix = 0,
1890         .cap_nt_find = SMB2_NT_FIND,
1891         .cap_large_files = SMB2_LARGE_FILES,
1892         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1893         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1894         .create_lease_size = sizeof(struct create_lease_v2),
1895 };
1896 #endif /* SMB311 */