kernel/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                 if (enable_oplocks) {
  54                         server->oplocks = true;
  55                         server->oplock_credits = 1;
  56                 } else
  57                         server->oplocks = false;
  58
  59                 server->echo_credits = 1;
  60         }
  61         server->credits -= server->echo_credits + server->oplock_credits;
  62         return 0;
  63 }
  64
  65 static void
  66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  67                  const int optype)
  68 {
  69         int *val, rc = 0;
  70         spin_lock(&server->req_lock);
  71         val = server->ops->get_credits_field(server, optype);
  72         *val += add;
  73         server->in_flight--;
  74         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  75                 rc = change_conf(server);
  76         /*
  77          * Sometimes server returns 0 credits on oplock break ack - we need to
  78          * rebalance credits in this case.
  79          */
  80         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  81                  server->oplocks) {
  82                 if (server->credits > 1) {
  83                         server->credits--;
  84                         server->oplock_credits++;
  85                 }
  86         }
  87         spin_unlock(&server->req_lock);
  88         wake_up(&server->request_q);
  89         if (rc)
  90                 cifs_reconnect(server);
  91 }
  92
  93 static void
  94 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  95 {
  96         spin_lock(&server->req_lock);
  97         server->credits = val;
  98         spin_unlock(&server->req_lock);
  99 }
 100
 101 static int *
 102 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 103 {
 104         switch (optype) {
 105         case CIFS_ECHO_OP:
 106                 return &server->echo_credits;
 107         case CIFS_OBREAK_OP:
 108                 return &server->oplock_credits;
 109         default:
 110                 return &server->credits;
 111         }
 112 }
 113
 114 static unsigned int
 115 smb2_get_credits(struct mid_q_entry *mid)
 116 {
 117         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 118 }
 119
 120 static int
 121 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 122                       unsigned int *num, unsigned int *credits)
 123 {
 124         int rc = 0;
 125         unsigned int scredits;
 126
 127         spin_lock(&server->req_lock);
 128         while (1) {
 129                 if (server->credits <= 0) {
 130                         spin_unlock(&server->req_lock);
 131                         cifs_num_waiters_inc(server);
 132                         rc = wait_event_killable(server->request_q,
 133                                         has_credits(server, &server->credits));
 134                         cifs_num_waiters_dec(server);
 135                         if (rc)
 136                                 return rc;
 137                         spin_lock(&server->req_lock);
 138                 } else {
 139                         if (server->tcpStatus == CifsExiting) {
 140                                 spin_unlock(&server->req_lock);
 141                                 return -ENOENT;
 142                         }
 143
 144                         scredits = server->credits;
 145                         /* can deadlock with reopen */
 146                         if (scredits == 1) {
 147                                 *num = SMB2_MAX_BUFFER_SIZE;
 148                                 *credits = 0;
 149                                 break;
 150                         }
 151
 152                         /* leave one credit for a possible reopen */
 153                         scredits--;
 154                         *num = min_t(unsigned int, size,
 155                                      scredits * SMB2_MAX_BUFFER_SIZE);
 156
 157                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 158                         server->credits -= *credits;
 159                         server->in_flight++;
 160                         break;
 161                 }
 162         }
 163         spin_unlock(&server->req_lock);
 164         return rc;
 165 }
 166
 167 static __u64
 168 smb2_get_next_mid(struct TCP_Server_Info *server)
 169 {
 170         __u64 mid;
 171         /* for SMB2 we need the current value */
 172         spin_lock(&GlobalMid_Lock);
 173         mid = server->CurrentMid++;
 174         spin_unlock(&GlobalMid_Lock);
 175         return mid;
 176 }
 177
 178 static struct mid_q_entry *
 179 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 180 {
 181         struct mid_q_entry *mid;
 182         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 183         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 184
 185         spin_lock(&GlobalMid_Lock);
 186         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 187                 if ((mid->mid == wire_mid) &&
 188                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 189                     (mid->command == hdr->Command)) {
 190                         spin_unlock(&GlobalMid_Lock);
 191                         return mid;
 192                 }
 193         }
 194         spin_unlock(&GlobalMid_Lock);
 195         return NULL;
 196 }
 197
 198 static void
 199 smb2_dump_detail(void *buf)
 200 {
 201 #ifdef CONFIG_CIFS_DEBUG2
 202         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 203
 204         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 205                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 206                  smb->ProcessId);
 207         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 208 #endif
 209 }
 210
 211 static bool
 212 smb2_need_neg(struct TCP_Server_Info *server)
 213 {
 214         return server->max_read == 0;
 215 }
 216
 217 static int
 218 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 219 {
 220         int rc;
 221         ses->server->CurrentMid = 0;
 222         rc = SMB2_negotiate(xid, ses);
 223         /* BB we probably don't need to retry with modern servers */
 224         if (rc == -EAGAIN)
 225                 rc = -EHOSTDOWN;
 226         return rc;
 227 }
 228
 229 static unsigned int
 230 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 231 {
 232         struct TCP_Server_Info *server = tcon->ses->server;
 233         unsigned int wsize;
 234
 235         /* start with specified wsize, or default */
 236         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 237         wsize = min_t(unsigned int, wsize, server->max_write);
 238
 239         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 240                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 241
 242         return wsize;
 243 }
 244
 245 static unsigned int
 246 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 247 {
 248         struct TCP_Server_Info *server = tcon->ses->server;
 249         unsigned int rsize;
 250
 251         /* start with specified rsize, or default */
 252         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 253         rsize = min_t(unsigned int, rsize, server->max_read);
 254
 255         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 256                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 257
 258         return rsize;
 259 }
 260
 261 #ifdef CONFIG_CIFS_STATS2
 262 static int
 263 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 264 {
 265         int rc;
 266         unsigned int ret_data_len = 0;
 267         struct network_interface_info_ioctl_rsp *out_buf;
 268
 269         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 270                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 271                         NULL /* no data input */, 0 /* no data input */,
 272                         (char **)&out_buf, &ret_data_len);
 273         if (rc != 0)
 274                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 275         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 276                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 277                 rc = -EINVAL;
 278         } else {
 279                 /* Dump info on first interface */
 280                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 281                         le32_to_cpu(out_buf->Capability));
 282                 cifs_dbg(FYI, "Link Speed %lld\n",
 283                         le64_to_cpu(out_buf->LinkSpeed));
 284         }
 285         kfree(out_buf);
 286         return rc;
 287 }
 288 #endif /* STATS2 */
 289
 290 static void
 291 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 292 {
 293         int rc;
 294         __le16 srch_path = 0; /* Null - open root of share */
 295         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 296         struct cifs_open_parms oparms;
 297         struct cifs_fid fid;
 298
 299         oparms.tcon = tcon;
 300         oparms.desired_access = FILE_READ_ATTRIBUTES;
 301         oparms.disposition = FILE_OPEN;
 302         oparms.create_options = 0;
 303         oparms.fid = &fid;
 304         oparms.reconnect = false;
 305
 306         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 307         if (rc)
 308                 return;
 309
 310 #ifdef CONFIG_CIFS_STATS2
 311         SMB3_request_interfaces(xid, tcon);
 312 #endif /* STATS2 */
 313
 314         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 315                         FS_ATTRIBUTE_INFORMATION);
 316         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 317                         FS_DEVICE_INFORMATION);
 318         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 319                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 320         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 321         return;
 322 }
 323
 324 static void
 325 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 326 {
 327         int rc;
 328         __le16 srch_path = 0; /* Null - open root of share */
 329         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 330         struct cifs_open_parms oparms;
 331         struct cifs_fid fid;
 332
 333         oparms.tcon = tcon;
 334         oparms.desired_access = FILE_READ_ATTRIBUTES;
 335         oparms.disposition = FILE_OPEN;
 336         oparms.create_options = 0;
 337         oparms.fid = &fid;
 338         oparms.reconnect = false;
 339
 340         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 341         if (rc)
 342                 return;
 343
 344         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 345                         FS_ATTRIBUTE_INFORMATION);
 346         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 347                         FS_DEVICE_INFORMATION);
 348         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 349         return;
 350 }
 351
 352 static int
 353 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 354                         struct cifs_sb_info *cifs_sb, const char *full_path)
 355 {
 356         int rc;
 357         __le16 *utf16_path;
 358         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 359         struct cifs_open_parms oparms;
 360         struct cifs_fid fid;
 361
 362         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 363         if (!utf16_path)
 364                 return -ENOMEM;
 365
 366         oparms.tcon = tcon;
 367         oparms.desired_access = FILE_READ_ATTRIBUTES;
 368         oparms.disposition = FILE_OPEN;
 369         oparms.create_options = 0;
 370         oparms.fid = &fid;
 371         oparms.reconnect = false;
 372
 373         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 374         if (rc) {
 375                 kfree(utf16_path);
 376                 return rc;
 377         }
 378
 379         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 380         kfree(utf16_path);
 381         return rc;
 382 }
 383
 384 static int
 385 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 386                   struct cifs_sb_info *cifs_sb, const char *full_path,
 387                   u64 *uniqueid, FILE_ALL_INFO *data)
 388 {
 389         *uniqueid = le64_to_cpu(data->IndexNumber);
 390         return 0;
 391 }
 392
 393 static int
 394 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 395                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 396 {
 397         int rc;
 398         struct smb2_file_all_info *smb2_data;
 399
 400         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 401                             GFP_KERNEL);
 402         if (smb2_data == NULL)
 403                 return -ENOMEM;
 404
 405         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 406                              smb2_data);
 407         if (!rc)
 408                 move_smb2_info_to_cifs(data, smb2_data);
 409         kfree(smb2_data);
 410         return rc;
 411 }
 412
 413 static bool
 414 smb2_can_echo(struct TCP_Server_Info *server)
 415 {
 416         return server->echoes;
 417 }
 418
 419 static void
 420 smb2_clear_stats(struct cifs_tcon *tcon)
 421 {
 422 #ifdef CONFIG_CIFS_STATS
 423         int i;
 424         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 425                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 426                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 427         }
 428 #endif
 429 }
 430
 431 static void
 432 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 433 {
 434         seq_puts(m, "\n\tShare Capabilities:");
 435         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 436                 seq_puts(m, " DFS,");
 437         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 438                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 439         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 440                 seq_puts(m, " SCALEOUT,");
 441         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 442                 seq_puts(m, " CLUSTER,");
 443         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 444                 seq_puts(m, " ASYMMETRIC,");
 445         if (tcon->capabilities == 0)
 446                 seq_puts(m, " None");
 447         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 448                 seq_puts(m, " Aligned,");
 449         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 450                 seq_puts(m, " Partition Aligned,");
 451         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 452                 seq_puts(m, " SSD,");
 453         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 454                 seq_puts(m, " TRIM-support,");
 455
 456         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 457         if (tcon->perf_sector_size)
 458                 seq_printf(m, "\tOptimal sector size: 0x%x",
 459                            tcon->perf_sector_size);
 460 }
 461
 462 static void
 463 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 464 {
 465 #ifdef CONFIG_CIFS_STATS
 466         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 467         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 468         seq_printf(m, "\nNegotiates: %d sent %d failed",
 469                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 470                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 471         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 472                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 473                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 474         seq_printf(m, "\nLogoffs: %d sent %d failed",
 475                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 476                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 477         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 478                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 479                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 480         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 481                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 482                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 483         seq_printf(m, "\nCreates: %d sent %d failed",
 484                    atomic_read(&sent[SMB2_CREATE_HE]),
 485                    atomic_read(&failed[SMB2_CREATE_HE]));
 486         seq_printf(m, "\nCloses: %d sent %d failed",
 487                    atomic_read(&sent[SMB2_CLOSE_HE]),
 488                    atomic_read(&failed[SMB2_CLOSE_HE]));
 489         seq_printf(m, "\nFlushes: %d sent %d failed",
 490                    atomic_read(&sent[SMB2_FLUSH_HE]),
 491                    atomic_read(&failed[SMB2_FLUSH_HE]));
 492         seq_printf(m, "\nReads: %d sent %d failed",
 493                    atomic_read(&sent[SMB2_READ_HE]),
 494                    atomic_read(&failed[SMB2_READ_HE]));
 495         seq_printf(m, "\nWrites: %d sent %d failed",
 496                    atomic_read(&sent[SMB2_WRITE_HE]),
 497                    atomic_read(&failed[SMB2_WRITE_HE]));
 498         seq_printf(m, "\nLocks: %d sent %d failed",
 499                    atomic_read(&sent[SMB2_LOCK_HE]),
 500                    atomic_read(&failed[SMB2_LOCK_HE]));
 501         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 502                    atomic_read(&sent[SMB2_IOCTL_HE]),
 503                    atomic_read(&failed[SMB2_IOCTL_HE]));
 504         seq_printf(m, "\nCancels: %d sent %d failed",
 505                    atomic_read(&sent[SMB2_CANCEL_HE]),
 506                    atomic_read(&failed[SMB2_CANCEL_HE]));
 507         seq_printf(m, "\nEchos: %d sent %d failed",
 508                    atomic_read(&sent[SMB2_ECHO_HE]),
 509                    atomic_read(&failed[SMB2_ECHO_HE]));
 510         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 511                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 512                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 513         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 514                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 515                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 516         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 517                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 518                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 519         seq_printf(m, "\nSetInfos: %d sent %d failed",
 520                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 521                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 522         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 523                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 524                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 525 #endif
 526 }
 527
 528 static void
 529 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 530 {
 531         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 532         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 533
 534         cfile->fid.persistent_fid = fid->persistent_fid;
 535         cfile->fid.volatile_fid = fid->volatile_fid;
 536         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 537                                       &fid->purge_cache);
 538         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 539         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 540 }
 541
 542 static void
 543 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 544                 struct cifs_fid *fid)
 545 {
 546         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 547 }
 548
 549 static int
 550 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 551                      u64 persistent_fid, u64 volatile_fid,
 552                      struct copychunk_ioctl *pcchunk)
 553 {
 554         int rc;
 555         unsigned int ret_data_len;
 556         struct resume_key_req *res_key;
 557
 558         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 559                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 560                         NULL, 0 /* no input */,
 561                         (char **)&res_key, &ret_data_len);
 562
 563         if (rc) {
 564                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 565                 goto req_res_key_exit;
 566         }
 567         if (ret_data_len < sizeof(struct resume_key_req)) {
 568                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 569                 rc = -EINVAL;
 570                 goto req_res_key_exit;
 571         }
 572         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 573
 574 req_res_key_exit:
 575         kfree(res_key);
 576         return rc;
 577 }
 578
 579 static int
 580 smb2_clone_range(const unsigned int xid,
 581                         struct cifsFileInfo *srcfile,
 582                         struct cifsFileInfo *trgtfile, u64 src_off,
 583                         u64 len, u64 dest_off)
 584 {
 585         int rc;
 586         unsigned int ret_data_len;
 587         struct copychunk_ioctl *pcchunk;
 588         struct copychunk_ioctl_rsp *retbuf = NULL;
 589         struct cifs_tcon *tcon;
 590         int chunks_copied = 0;
 591         bool chunk_sizes_updated = false;
 592
 593         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 594
 595         if (pcchunk == NULL)
 596                 return -ENOMEM;
 597
 598         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 599         /* Request a key from the server to identify the source of the copy */
 600         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 601                                 srcfile->fid.persistent_fid,
 602                                 srcfile->fid.volatile_fid, pcchunk);
 603
 604         /* Note: request_res_key sets res_key null only if rc !=0 */
 605         if (rc)
 606                 goto cchunk_out;
 607
 608         /* For now array only one chunk long, will make more flexible later */
 609         pcchunk->ChunkCount = cpu_to_le32(1);
 610         pcchunk->Reserved = 0;
 611         pcchunk->Reserved2 = 0;
 612
 613         tcon = tlink_tcon(trgtfile->tlink);
 614
 615         while (len > 0) {
 616                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 617                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 618                 pcchunk->Length =
 619                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 620
 621                 /* Request server copy to target from src identified by key */
 622                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 623                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 624                         true /* is_fsctl */, (char *)pcchunk,
 625                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 626                         &ret_data_len);
 627                 if (rc == 0) {
 628                         if (ret_data_len !=
 629                                         sizeof(struct copychunk_ioctl_rsp)) {
 630                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 631                                 rc = -EIO;
 632                                 goto cchunk_out;
 633                         }
 634                         if (retbuf->TotalBytesWritten == 0) {
 635                                 cifs_dbg(FYI, "no bytes copied\n");
 636                                 rc = -EIO;
 637                                 goto cchunk_out;
 638                         }
 639                         /*
 640                          * Check if server claimed to write more than we asked
 641                          */
 642                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 643                             le32_to_cpu(pcchunk->Length)) {
 644                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 645                                 rc = -EIO;
 646                                 goto cchunk_out;
 647                         }
 648                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 649                                 cifs_dbg(VFS, "invalid num chunks written\n");
 650                                 rc = -EIO;
 651                                 goto cchunk_out;
 652                         }
 653                         chunks_copied++;
 654
 655                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 656                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 657                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 658
 659                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 660                                 le32_to_cpu(retbuf->ChunksWritten),
 661                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 662                                 le32_to_cpu(retbuf->TotalBytesWritten));
 663                 } else if (rc == -EINVAL) {
 664                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 665                                 goto cchunk_out;
 666
 667                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 668                                 le32_to_cpu(retbuf->ChunksWritten),
 669                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 670                                 le32_to_cpu(retbuf->TotalBytesWritten));
 671
 672                         /*
 673                          * Check if this is the first request using these sizes,
 674                          * (ie check if copy succeed once with original sizes
 675                          * and check if the server gave us different sizes after
 676                          * we already updated max sizes on previous request).
 677                          * if not then why is the server returning an error now
 678                          */
 679                         if ((chunks_copied != 0) || chunk_sizes_updated)
 680                                 goto cchunk_out;
 681
 682                         /* Check that server is not asking us to grow size */
 683                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 684                                         tcon->max_bytes_chunk)
 685                                 tcon->max_bytes_chunk =
 686                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 687                         else
 688                                 goto cchunk_out; /* server gave us bogus size */
 689
 690                         /* No need to change MaxChunks since already set to 1 */
 691                         chunk_sizes_updated = true;
 692                 } else
 693                         goto cchunk_out;
 694         }
 695
 696 cchunk_out:
 697         kfree(pcchunk);
 698         kfree(retbuf);
 699         return rc;
 700 }
 701
 702 static int
 703 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 704                 struct cifs_fid *fid)
 705 {
 706         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 707 }
 708
 709 static unsigned int
 710 smb2_read_data_offset(char *buf)
 711 {
 712         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 713         return rsp->DataOffset;
 714 }
 715
 716 static unsigned int
 717 smb2_read_data_length(char *buf)
 718 {
 719         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 720         return le32_to_cpu(rsp->DataLength);
 721 }
 722
 723
 724 static int
 725 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 726                struct cifs_io_parms *parms, unsigned int *bytes_read,
 727                char **buf, int *buf_type)
 728 {
 729         parms->persistent_fid = pfid->persistent_fid;
 730         parms->volatile_fid = pfid->volatile_fid;
 731         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 732 }
 733
 734 static int
 735 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 736                 struct cifs_io_parms *parms, unsigned int *written,
 737                 struct kvec *iov, unsigned long nr_segs)
 738 {
 739
 740         parms->persistent_fid = pfid->persistent_fid;
 741         parms->volatile_fid = pfid->volatile_fid;
 742         return SMB2_write(xid, parms, written, iov, nr_segs);
 743 }
 744
 745 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 746 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 747                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 748 {
 749         struct cifsInodeInfo *cifsi;
 750         int rc;
 751
 752         cifsi = CIFS_I(inode);
 753
 754         /* if file already sparse don't bother setting sparse again */
 755         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 756                 return true; /* already sparse */
 757
 758         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 759                 return true; /* already not sparse */
 760
 761         /*
 762          * Can't check for sparse support on share the usual way via the
 763          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 764          * since Samba server doesn't set the flag on the share, yet
 765          * supports the set sparse FSCTL and returns sparse correctly
 766          * in the file attributes. If we fail setting sparse though we
 767          * mark that server does not support sparse files for this share
 768          * to avoid repeatedly sending the unsupported fsctl to server
 769          * if the file is repeatedly extended.
 770          */
 771         if (tcon->broken_sparse_sup)
 772                 return false;
 773
 774         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 775                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 776                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 777         if (rc) {
 778                 tcon->broken_sparse_sup = true;
 779                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 780                 return false;
 781         }
 782
 783         if (setsparse)
 784                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 785         else
 786                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 787
 788         return true;
 789 }
 790
 791 static int
 792 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 793                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 794 {
 795         __le64 eof = cpu_to_le64(size);
 796         struct inode *inode;
 797
 798         /*
 799          * If extending file more than one page make sparse. Many Linux fs
 800          * make files sparse by default when extending via ftruncate
 801          */
 802         inode = d_inode(cfile->dentry);
 803
 804         if (!set_alloc && (size > inode->i_size + 8192)) {
 805                 __u8 set_sparse = 1;
 806
 807                 /* whether set sparse succeeds or not, extend the file */
 808                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 809         }
 810
 811         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 812                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 813 }
 814
 815 static int
 816 smb2_duplicate_extents(const unsigned int xid,
 817                         struct cifsFileInfo *srcfile,
 818                         struct cifsFileInfo *trgtfile, u64 src_off,
 819                         u64 len, u64 dest_off)
 820 {
 821         int rc;
 822         unsigned int ret_data_len;
 823         struct duplicate_extents_to_file dup_ext_buf;
 824         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 825
 826         /* server fileays advertise duplicate extent support with this flag */
 827         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 828              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 829                 return -EOPNOTSUPP;
 830
 831         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 832         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 833         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 834         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 835         dup_ext_buf.ByteCount = cpu_to_le64(len);
 836         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 837                 src_off, dest_off, len);
 838
 839         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 840         if (rc)
 841                 goto duplicate_extents_out;
 842
 843         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 844                         trgtfile->fid.volatile_fid,
 845                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 846                         true /* is_fsctl */, (char *)&dup_ext_buf,
 847                         sizeof(struct duplicate_extents_to_file),
 848                         NULL,
 849                         &ret_data_len);
 850
 851         if (ret_data_len > 0)
 852                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 853
 854 duplicate_extents_out:
 855         return rc;
 856 }
 857
 858 static int
 859 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 860                    struct cifsFileInfo *cfile)
 861 {
 862         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 863                             cfile->fid.volatile_fid);
 864 }
 865
 866 static int
 867 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 868                    struct cifsFileInfo *cfile)
 869 {
 870         struct fsctl_set_integrity_information_req integr_info;
 871         unsigned int ret_data_len;
 872
 873         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 874         integr_info.Flags = 0;
 875         integr_info.Reserved = 0;
 876
 877         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 878                         cfile->fid.volatile_fid,
 879                         FSCTL_SET_INTEGRITY_INFORMATION,
 880                         true /* is_fsctl */, (char *)&integr_info,
 881                         sizeof(struct fsctl_set_integrity_information_req),
 882                         NULL,
 883                         &ret_data_len);
 884
 885 }
 886
 887 static int
 888 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 889                      const char *path, struct cifs_sb_info *cifs_sb,
 890                      struct cifs_fid *fid, __u16 search_flags,
 891                      struct cifs_search_info *srch_inf)
 892 {
 893         __le16 *utf16_path;
 894         int rc;
 895         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 896         struct cifs_open_parms oparms;
 897
 898         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 899         if (!utf16_path)
 900                 return -ENOMEM;
 901
 902         oparms.tcon = tcon;
 903         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 904         oparms.disposition = FILE_OPEN;
 905         oparms.create_options = 0;
 906         oparms.fid = fid;
 907         oparms.reconnect = false;
 908
 909         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 910         kfree(utf16_path);
 911         if (rc) {
 912                 cifs_dbg(VFS, "open dir failed\n");
 913                 return rc;
 914         }
 915
 916         srch_inf->entries_in_buffer = 0;
 917         srch_inf->index_of_last_entry = 0;
 918
 919         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 920                                   fid->volatile_fid, 0, srch_inf);
 921         if (rc) {
 922                 cifs_dbg(VFS, "query directory failed\n");
 923                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 924         }
 925         return rc;
 926 }
 927
 928 static int
 929 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 930                     struct cifs_fid *fid, __u16 search_flags,
 931                     struct cifs_search_info *srch_inf)
 932 {
 933         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 934                                     fid->volatile_fid, 0, srch_inf);
 935 }
 936
 937 static int
 938 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 939                struct cifs_fid *fid)
 940 {
 941         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 942 }
 943
 944 /*
 945 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 946 * the number of credits and return true. Otherwise - return false.
 947 */
 948 static bool
 949 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 950 {
 951         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 952
 953         if (hdr->Status != STATUS_PENDING)
 954                 return false;
 955
 956         if (!length) {
 957                 spin_lock(&server->req_lock);
 958                 server->credits += le16_to_cpu(hdr->CreditRequest);
 959                 spin_unlock(&server->req_lock);
 960                 wake_up(&server->request_q);
 961         }
 962
 963         return true;
 964 }
 965
 966 static int
 967 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 968                      struct cifsInodeInfo *cinode)
 969 {
 970         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 971                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 972                                         smb2_get_lease_state(cinode));
 973
 974         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 975                                  fid->volatile_fid,
 976                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 977 }
 978
 979 static int
 980 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 981              struct kstatfs *buf)
 982 {
 983         int rc;
 984         __le16 srch_path = 0; /* Null - open root of share */
 985         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 986         struct cifs_open_parms oparms;
 987         struct cifs_fid fid;
 988
 989         oparms.tcon = tcon;
 990         oparms.desired_access = FILE_READ_ATTRIBUTES;
 991         oparms.disposition = FILE_OPEN;
 992         oparms.create_options = 0;
 993         oparms.fid = &fid;
 994         oparms.reconnect = false;
 995
 996         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 997         if (rc)
 998                 return rc;
 999         buf->f_type = SMB2_MAGIC_NUMBER;
1000         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1001                            buf);
1002         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1003         return rc;
1004 }
1005
1006 static bool
1007 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1008 {
1009         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1010                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1011 }
1012
1013 static int
1014 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1015                __u64 length, __u32 type, int lock, int unlock, bool wait)
1016 {
1017         if (unlock && !lock)
1018                 type = SMB2_LOCKFLAG_UNLOCK;
1019         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1020                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1021                          current->tgid, length, offset, type, wait);
1022 }
1023
1024 static void
1025 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1026 {
1027         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1028 }
1029
1030 static void
1031 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1032 {
1033         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1034 }
1035
1036 static void
1037 smb2_new_lease_key(struct cifs_fid *fid)
1038 {
1039         generate_random_uuid(fid->lease_key);
1040 }
1041
1042 #define SMB2_SYMLINK_STRUCT_SIZE \
1043         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1044
1045 static int
1046 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1047                    const char *full_path, char **target_path,
1048                    struct cifs_sb_info *cifs_sb)
1049 {
1050         int rc;
1051         __le16 *utf16_path;
1052         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1053         struct cifs_open_parms oparms;
1054         struct cifs_fid fid;
1055         struct smb2_err_rsp *err_buf = NULL;
1056         struct smb2_symlink_err_rsp *symlink;
1057         unsigned int sub_len;
1058         unsigned int sub_offset;
1059         unsigned int print_len;
1060         unsigned int print_offset;
1061
1062         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1063
1064         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1065         if (!utf16_path)
1066                 return -ENOMEM;
1067
1068         oparms.tcon = tcon;
1069         oparms.desired_access = FILE_READ_ATTRIBUTES;
1070         oparms.disposition = FILE_OPEN;
1071         oparms.create_options = 0;
1072         oparms.fid = &fid;
1073         oparms.reconnect = false;
1074
1075         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1076
1077         if (!rc || !err_buf) {
1078                 kfree(utf16_path);
1079                 return -ENOENT;
1080         }
1081
1082         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1083             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1084                 kfree(utf16_path);
1085                 return -ENOENT;
1086         }
1087
1088         /* open must fail on symlink - reset rc */
1089         rc = 0;
1090         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1091         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1092         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1093         print_len = le16_to_cpu(symlink->PrintNameLength);
1094         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1095
1096         if (get_rfc1002_length(err_buf) + 4 <
1097                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1098                 kfree(utf16_path);
1099                 return -ENOENT;
1100         }
1101
1102         if (get_rfc1002_length(err_buf) + 4 <
1103                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1104                 kfree(utf16_path);
1105                 return -ENOENT;
1106         }
1107
1108         *target_path = cifs_strndup_from_utf16(
1109                                 (char *)symlink->PathBuffer + sub_offset,
1110                                 sub_len, true, cifs_sb->local_nls);
1111         if (!(*target_path)) {
1112                 kfree(utf16_path);
1113                 return -ENOMEM;
1114         }
1115         convert_delimiter(*target_path, '/');
1116         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1117         kfree(utf16_path);
1118         return rc;
1119 }
1120
1121 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1122                             loff_t offset, loff_t len, bool keep_size)
1123 {
1124         struct inode *inode;
1125         struct cifsInodeInfo *cifsi;
1126         struct cifsFileInfo *cfile = file->private_data;
1127         struct file_zero_data_information fsctl_buf;
1128         long rc;
1129         unsigned int xid;
1130
1131         xid = get_xid();
1132
1133         inode = d_inode(cfile->dentry);
1134         cifsi = CIFS_I(inode);
1135
1136         /* if file not oplocked can't be sure whether asking to extend size */
1137         if (!CIFS_CACHE_READ(cifsi))
1138                 if (keep_size == false)
1139                         return -EOPNOTSUPP;
1140
1141         /*
1142          * Must check if file sparse since fallocate -z (zero range) assumes
1143          * non-sparse allocation
1144          */
1145         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1146                 return -EOPNOTSUPP;
1147
1148         /*
1149          * need to make sure we are not asked to extend the file since the SMB3
1150          * fsctl does not change the file size. In the future we could change
1151          * this to zero the first part of the range then set the file size
1152          * which for a non sparse file would zero the newly extended range
1153          */
1154         if (keep_size == false)
1155                 if (i_size_read(inode) < offset + len)
1156                         return -EOPNOTSUPP;
1157
1158         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1159
1160         fsctl_buf.FileOffset = cpu_to_le64(offset);
1161         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1162
1163         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1164                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1165                         true /* is_fctl */, (char *)&fsctl_buf,
1166                         sizeof(struct file_zero_data_information), NULL, NULL);
1167         free_xid(xid);
1168         return rc;
1169 }
1170
1171 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1172                             loff_t offset, loff_t len)
1173 {
1174         struct inode *inode;
1175         struct cifsInodeInfo *cifsi;
1176         struct cifsFileInfo *cfile = file->private_data;
1177         struct file_zero_data_information fsctl_buf;
1178         long rc;
1179         unsigned int xid;
1180         __u8 set_sparse = 1;
1181
1182         xid = get_xid();
1183
1184         inode = d_inode(cfile->dentry);
1185         cifsi = CIFS_I(inode);
1186
1187         /* Need to make file sparse, if not already, before freeing range. */
1188         /* Consider adding equivalent for compressed since it could also work */
1189         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1190                 return -EOPNOTSUPP;
1191
1192         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1193
1194         fsctl_buf.FileOffset = cpu_to_le64(offset);
1195         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1196
1197         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1198                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1199                         true /* is_fctl */, (char *)&fsctl_buf,
1200                         sizeof(struct file_zero_data_information), NULL, NULL);
1201         free_xid(xid);
1202         return rc;
1203 }
1204
1205 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1206                             loff_t off, loff_t len, bool keep_size)
1207 {
1208         struct inode *inode;
1209         struct cifsInodeInfo *cifsi;
1210         struct cifsFileInfo *cfile = file->private_data;
1211         long rc = -EOPNOTSUPP;
1212         unsigned int xid;
1213
1214         xid = get_xid();
1215
1216         inode = d_inode(cfile->dentry);
1217         cifsi = CIFS_I(inode);
1218
1219         /* if file not oplocked can't be sure whether asking to extend size */
1220         if (!CIFS_CACHE_READ(cifsi))
1221                 if (keep_size == false)
1222                         return -EOPNOTSUPP;
1223
1224         /*
1225          * Files are non-sparse by default so falloc may be a no-op
1226          * Must check if file sparse. If not sparse, and not extending
1227          * then no need to do anything since file already allocated
1228          */
1229         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1230                 if (keep_size == true)
1231                         return 0;
1232                 /* check if extending file */
1233                 else if (i_size_read(inode) >= off + len)
1234                         /* not extending file and already not sparse */
1235                         return 0;
1236                 /* BB: in future add else clause to extend file */
1237                 else
1238                         return -EOPNOTSUPP;
1239         }
1240
1241         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1242                 /*
1243                  * Check if falloc starts within first few pages of file
1244                  * and ends within a few pages of the end of file to
1245                  * ensure that most of file is being forced to be
1246                  * fallocated now. If so then setting whole file sparse
1247                  * ie potentially making a few extra pages at the beginning
1248                  * or end of the file non-sparse via set_sparse is harmless.
1249                  */
1250                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1251                         return -EOPNOTSUPP;
1252
1253                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1254         }
1255         /* BB: else ... in future add code to extend file and set sparse */
1256
1257
1258         free_xid(xid);
1259         return rc;
1260 }
1261
1262
1263 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1264                            loff_t off, loff_t len)
1265 {
1266         /* KEEP_SIZE already checked for by do_fallocate */
1267         if (mode & FALLOC_FL_PUNCH_HOLE)
1268                 return smb3_punch_hole(file, tcon, off, len);
1269         else if (mode & FALLOC_FL_ZERO_RANGE) {
1270                 if (mode & FALLOC_FL_KEEP_SIZE)
1271                         return smb3_zero_range(file, tcon, off, len, true);
1272                 return smb3_zero_range(file, tcon, off, len, false);
1273         } else if (mode == FALLOC_FL_KEEP_SIZE)
1274                 return smb3_simple_falloc(file, tcon, off, len, true);
1275         else if (mode == 0)
1276                 return smb3_simple_falloc(file, tcon, off, len, false);
1277
1278         return -EOPNOTSUPP;
1279 }
1280
1281 static void
1282 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1283                         struct cifsInodeInfo *cinode, bool set_level2)
1284 {
1285         if (set_level2)
1286                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1287                                                 0, NULL);
1288         else
1289                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1290 }
1291
1292 static void
1293 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1294                       unsigned int epoch, bool *purge_cache)
1295 {
1296         oplock &= 0xFF;
1297         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1298                 return;
1299         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1300                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1301                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1302                          &cinode->vfs_inode);
1303         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1304                 cinode->oplock = CIFS_CACHE_RW_FLG;
1305                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1306                          &cinode->vfs_inode);
1307         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1308                 cinode->oplock = CIFS_CACHE_READ_FLG;
1309                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1310                          &cinode->vfs_inode);
1311         } else
1312                 cinode->oplock = 0;
1313 }
1314
1315 static void
1316 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1317                        unsigned int epoch, bool *purge_cache)
1318 {
1319         char message[5] = {0};
1320
1321         oplock &= 0xFF;
1322         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1323                 return;
1324
1325         cinode->oplock = 0;
1326         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1327                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1328                 strcat(message, "R");
1329         }
1330         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1331                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1332                 strcat(message, "H");
1333         }
1334         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1335                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1336                 strcat(message, "W");
1337         }
1338         if (!cinode->oplock)
1339                 strcat(message, "None");
1340         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1341                  &cinode->vfs_inode);
1342 }
1343
1344 static void
1345 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1346                       unsigned int epoch, bool *purge_cache)
1347 {
1348         unsigned int old_oplock = cinode->oplock;
1349
1350         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1351
1352         if (purge_cache) {
1353                 *purge_cache = false;
1354                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1355                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1356                             (epoch - cinode->epoch > 0))
1357                                 *purge_cache = true;
1358                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1359                                  (epoch - cinode->epoch > 1))
1360                                 *purge_cache = true;
1361                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1362                                  (epoch - cinode->epoch > 1))
1363                                 *purge_cache = true;
1364                         else if (cinode->oplock == 0 &&
1365                                  (epoch - cinode->epoch > 0))
1366                                 *purge_cache = true;
1367                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1368                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1369                             (epoch - cinode->epoch > 0))
1370                                 *purge_cache = true;
1371                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1372                                  (epoch - cinode->epoch > 1))
1373                                 *purge_cache = true;
1374                 }
1375                 cinode->epoch = epoch;
1376         }
1377 }
1378
1379 static bool
1380 smb2_is_read_op(__u32 oplock)
1381 {
1382         return oplock == SMB2_OPLOCK_LEVEL_II;
1383 }
1384
1385 static bool
1386 smb21_is_read_op(__u32 oplock)
1387 {
1388         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1389                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1390 }
1391
1392 static __le32
1393 map_oplock_to_lease(u8 oplock)
1394 {
1395         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1396                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1397         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1398                 return SMB2_LEASE_READ_CACHING;
1399         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1400                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1401                        SMB2_LEASE_WRITE_CACHING;
1402         return 0;
1403 }
1404
1405 static char *
1406 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1407 {
1408         struct create_lease *buf;
1409
1410         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1411         if (!buf)
1412                 return NULL;
1413
1414         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1415         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1416         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1417
1418         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1419                                         (struct create_lease, lcontext));
1420         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1421         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1422                                 (struct create_lease, Name));
1423         buf->ccontext.NameLength = cpu_to_le16(4);
1424         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1425         buf->Name[0] = 'R';
1426         buf->Name[1] = 'q';
1427         buf->Name[2] = 'L';
1428         buf->Name[3] = 's';
1429         return (char *)buf;
1430 }
1431
1432 static char *
1433 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1434 {
1435         struct create_lease_v2 *buf;
1436
1437         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1438         if (!buf)
1439                 return NULL;
1440
1441         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1442         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1443         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1444
1445         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1446                                         (struct create_lease_v2, lcontext));
1447         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1448         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1449                                 (struct create_lease_v2, Name));
1450         buf->ccontext.NameLength = cpu_to_le16(4);
1451         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1452         buf->Name[0] = 'R';
1453         buf->Name[1] = 'q';
1454         buf->Name[2] = 'L';
1455         buf->Name[3] = 's';
1456         return (char *)buf;
1457 }
1458
1459 static __u8
1460 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1461 {
1462         struct create_lease *lc = (struct create_lease *)buf;
1463
1464         *epoch = 0; /* not used */
1465         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1466                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1467         return le32_to_cpu(lc->lcontext.LeaseState);
1468 }
1469
1470 static __u8
1471 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1472 {
1473         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1474
1475         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1476         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1477                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1478         return le32_to_cpu(lc->lcontext.LeaseState);
1479 }
1480
1481 static unsigned int
1482 smb2_wp_retry_size(struct inode *inode)
1483 {
1484         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1485                      SMB2_MAX_BUFFER_SIZE);
1486 }
1487
1488 static bool
1489 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1490 {
1491         return !cfile->invalidHandle;
1492 }
1493
1494 struct smb_version_operations smb20_operations = {
1495         .compare_fids = smb2_compare_fids,
1496         .setup_request = smb2_setup_request,
1497         .setup_async_request = smb2_setup_async_request,
1498         .check_receive = smb2_check_receive,
1499         .add_credits = smb2_add_credits,
1500         .set_credits = smb2_set_credits,
1501         .get_credits_field = smb2_get_credits_field,
1502         .get_credits = smb2_get_credits,
1503         .wait_mtu_credits = cifs_wait_mtu_credits,
1504         .get_next_mid = smb2_get_next_mid,
1505         .read_data_offset = smb2_read_data_offset,
1506         .read_data_length = smb2_read_data_length,
1507         .map_error = map_smb2_to_linux_error,
1508         .find_mid = smb2_find_mid,
1509         .check_message = smb2_check_message,
1510         .dump_detail = smb2_dump_detail,
1511         .clear_stats = smb2_clear_stats,
1512         .print_stats = smb2_print_stats,
1513         .is_oplock_break = smb2_is_valid_oplock_break,
1514         .downgrade_oplock = smb2_downgrade_oplock,
1515         .need_neg = smb2_need_neg,
1516         .negotiate = smb2_negotiate,
1517         .negotiate_wsize = smb2_negotiate_wsize,
1518         .negotiate_rsize = smb2_negotiate_rsize,
1519         .sess_setup = SMB2_sess_setup,
1520         .logoff = SMB2_logoff,
1521         .tree_connect = SMB2_tcon,
1522         .tree_disconnect = SMB2_tdis,
1523         .qfs_tcon = smb2_qfs_tcon,
1524         .is_path_accessible = smb2_is_path_accessible,
1525         .can_echo = smb2_can_echo,
1526         .echo = SMB2_echo,
1527         .query_path_info = smb2_query_path_info,
1528         .get_srv_inum = smb2_get_srv_inum,
1529         .query_file_info = smb2_query_file_info,
1530         .set_path_size = smb2_set_path_size,
1531         .set_file_size = smb2_set_file_size,
1532         .set_file_info = smb2_set_file_info,
1533         .set_compression = smb2_set_compression,
1534         .mkdir = smb2_mkdir,
1535         .mkdir_setinfo = smb2_mkdir_setinfo,
1536         .rmdir = smb2_rmdir,
1537         .unlink = smb2_unlink,
1538         .rename = smb2_rename_path,
1539         .create_hardlink = smb2_create_hardlink,
1540         .query_symlink = smb2_query_symlink,
1541         .open = smb2_open_file,
1542         .set_fid = smb2_set_fid,
1543         .close = smb2_close_file,
1544         .flush = smb2_flush_file,
1545         .async_readv = smb2_async_readv,
1546         .async_writev = smb2_async_writev,
1547         .sync_read = smb2_sync_read,
1548         .sync_write = smb2_sync_write,
1549         .query_dir_first = smb2_query_dir_first,
1550         .query_dir_next = smb2_query_dir_next,
1551         .close_dir = smb2_close_dir,
1552         .calc_smb_size = smb2_calc_size,
1553         .is_status_pending = smb2_is_status_pending,
1554         .oplock_response = smb2_oplock_response,
1555         .queryfs = smb2_queryfs,
1556         .mand_lock = smb2_mand_lock,
1557         .mand_unlock_range = smb2_unlock_range,
1558         .push_mand_locks = smb2_push_mandatory_locks,
1559         .get_lease_key = smb2_get_lease_key,
1560         .set_lease_key = smb2_set_lease_key,
1561         .new_lease_key = smb2_new_lease_key,
1562         .calc_signature = smb2_calc_signature,
1563         .is_read_op = smb2_is_read_op,
1564         .set_oplock_level = smb2_set_oplock_level,
1565         .create_lease_buf = smb2_create_lease_buf,
1566         .parse_lease_buf = smb2_parse_lease_buf,
1567         .clone_range = smb2_clone_range,
1568         .wp_retry_size = smb2_wp_retry_size,
1569         .dir_needs_close = smb2_dir_needs_close,
1570 };
1571
1572 struct smb_version_operations smb21_operations = {
1573         .compare_fids = smb2_compare_fids,
1574         .setup_request = smb2_setup_request,
1575         .setup_async_request = smb2_setup_async_request,
1576         .check_receive = smb2_check_receive,
1577         .add_credits = smb2_add_credits,
1578         .set_credits = smb2_set_credits,
1579         .get_credits_field = smb2_get_credits_field,
1580         .get_credits = smb2_get_credits,
1581         .wait_mtu_credits = smb2_wait_mtu_credits,
1582         .get_next_mid = smb2_get_next_mid,
1583         .read_data_offset = smb2_read_data_offset,
1584         .read_data_length = smb2_read_data_length,
1585         .map_error = map_smb2_to_linux_error,
1586         .find_mid = smb2_find_mid,
1587         .check_message = smb2_check_message,
1588         .dump_detail = smb2_dump_detail,
1589         .clear_stats = smb2_clear_stats,
1590         .print_stats = smb2_print_stats,
1591         .is_oplock_break = smb2_is_valid_oplock_break,
1592         .downgrade_oplock = smb2_downgrade_oplock,
1593         .need_neg = smb2_need_neg,
1594         .negotiate = smb2_negotiate,
1595         .negotiate_wsize = smb2_negotiate_wsize,
1596         .negotiate_rsize = smb2_negotiate_rsize,
1597         .sess_setup = SMB2_sess_setup,
1598         .logoff = SMB2_logoff,
1599         .tree_connect = SMB2_tcon,
1600         .tree_disconnect = SMB2_tdis,
1601         .qfs_tcon = smb2_qfs_tcon,
1602         .is_path_accessible = smb2_is_path_accessible,
1603         .can_echo = smb2_can_echo,
1604         .echo = SMB2_echo,
1605         .query_path_info = smb2_query_path_info,
1606         .get_srv_inum = smb2_get_srv_inum,
1607         .query_file_info = smb2_query_file_info,
1608         .set_path_size = smb2_set_path_size,
1609         .set_file_size = smb2_set_file_size,
1610         .set_file_info = smb2_set_file_info,
1611         .set_compression = smb2_set_compression,
1612         .mkdir = smb2_mkdir,
1613         .mkdir_setinfo = smb2_mkdir_setinfo,
1614         .rmdir = smb2_rmdir,
1615         .unlink = smb2_unlink,
1616         .rename = smb2_rename_path,
1617         .create_hardlink = smb2_create_hardlink,
1618         .query_symlink = smb2_query_symlink,
1619         .query_mf_symlink = smb3_query_mf_symlink,
1620         .create_mf_symlink = smb3_create_mf_symlink,
1621         .open = smb2_open_file,
1622         .set_fid = smb2_set_fid,
1623         .close = smb2_close_file,
1624         .flush = smb2_flush_file,
1625         .async_readv = smb2_async_readv,
1626         .async_writev = smb2_async_writev,
1627         .sync_read = smb2_sync_read,
1628         .sync_write = smb2_sync_write,
1629         .query_dir_first = smb2_query_dir_first,
1630         .query_dir_next = smb2_query_dir_next,
1631         .close_dir = smb2_close_dir,
1632         .calc_smb_size = smb2_calc_size,
1633         .is_status_pending = smb2_is_status_pending,
1634         .oplock_response = smb2_oplock_response,
1635         .queryfs = smb2_queryfs,
1636         .mand_lock = smb2_mand_lock,
1637         .mand_unlock_range = smb2_unlock_range,
1638         .push_mand_locks = smb2_push_mandatory_locks,
1639         .get_lease_key = smb2_get_lease_key,
1640         .set_lease_key = smb2_set_lease_key,
1641         .new_lease_key = smb2_new_lease_key,
1642         .calc_signature = smb2_calc_signature,
1643         .is_read_op = smb21_is_read_op,
1644         .set_oplock_level = smb21_set_oplock_level,
1645         .create_lease_buf = smb2_create_lease_buf,
1646         .parse_lease_buf = smb2_parse_lease_buf,
1647         .clone_range = smb2_clone_range,
1648         .wp_retry_size = smb2_wp_retry_size,
1649         .dir_needs_close = smb2_dir_needs_close,
1650 };
1651
1652 struct smb_version_operations smb30_operations = {
1653         .compare_fids = smb2_compare_fids,
1654         .setup_request = smb2_setup_request,
1655         .setup_async_request = smb2_setup_async_request,
1656         .check_receive = smb2_check_receive,
1657         .add_credits = smb2_add_credits,
1658         .set_credits = smb2_set_credits,
1659         .get_credits_field = smb2_get_credits_field,
1660         .get_credits = smb2_get_credits,
1661         .wait_mtu_credits = smb2_wait_mtu_credits,
1662         .get_next_mid = smb2_get_next_mid,
1663         .read_data_offset = smb2_read_data_offset,
1664         .read_data_length = smb2_read_data_length,
1665         .map_error = map_smb2_to_linux_error,
1666         .find_mid = smb2_find_mid,
1667         .check_message = smb2_check_message,
1668         .dump_detail = smb2_dump_detail,
1669         .clear_stats = smb2_clear_stats,
1670         .print_stats = smb2_print_stats,
1671         .dump_share_caps = smb2_dump_share_caps,
1672         .is_oplock_break = smb2_is_valid_oplock_break,
1673         .downgrade_oplock = smb2_downgrade_oplock,
1674         .need_neg = smb2_need_neg,
1675         .negotiate = smb2_negotiate,
1676         .negotiate_wsize = smb2_negotiate_wsize,
1677         .negotiate_rsize = smb2_negotiate_rsize,
1678         .sess_setup = SMB2_sess_setup,
1679         .logoff = SMB2_logoff,
1680         .tree_connect = SMB2_tcon,
1681         .tree_disconnect = SMB2_tdis,
1682         .qfs_tcon = smb3_qfs_tcon,
1683         .is_path_accessible = smb2_is_path_accessible,
1684         .can_echo = smb2_can_echo,
1685         .echo = SMB2_echo,
1686         .query_path_info = smb2_query_path_info,
1687         .get_srv_inum = smb2_get_srv_inum,
1688         .query_file_info = smb2_query_file_info,
1689         .set_path_size = smb2_set_path_size,
1690         .set_file_size = smb2_set_file_size,
1691         .set_file_info = smb2_set_file_info,
1692         .set_compression = smb2_set_compression,
1693         .mkdir = smb2_mkdir,
1694         .mkdir_setinfo = smb2_mkdir_setinfo,
1695         .rmdir = smb2_rmdir,
1696         .unlink = smb2_unlink,
1697         .rename = smb2_rename_path,
1698         .create_hardlink = smb2_create_hardlink,
1699         .query_symlink = smb2_query_symlink,
1700         .query_mf_symlink = smb3_query_mf_symlink,
1701         .create_mf_symlink = smb3_create_mf_symlink,
1702         .open = smb2_open_file,
1703         .set_fid = smb2_set_fid,
1704         .close = smb2_close_file,
1705         .flush = smb2_flush_file,
1706         .async_readv = smb2_async_readv,
1707         .async_writev = smb2_async_writev,
1708         .sync_read = smb2_sync_read,
1709         .sync_write = smb2_sync_write,
1710         .query_dir_first = smb2_query_dir_first,
1711         .query_dir_next = smb2_query_dir_next,
1712         .close_dir = smb2_close_dir,
1713         .calc_smb_size = smb2_calc_size,
1714         .is_status_pending = smb2_is_status_pending,
1715         .oplock_response = smb2_oplock_response,
1716         .queryfs = smb2_queryfs,
1717         .mand_lock = smb2_mand_lock,
1718         .mand_unlock_range = smb2_unlock_range,
1719         .push_mand_locks = smb2_push_mandatory_locks,
1720         .get_lease_key = smb2_get_lease_key,
1721         .set_lease_key = smb2_set_lease_key,
1722         .new_lease_key = smb2_new_lease_key,
1723         .generate_signingkey = generate_smb3signingkey,
1724         .calc_signature = smb3_calc_signature,
1725         .set_integrity  = smb3_set_integrity,
1726         .is_read_op = smb21_is_read_op,
1727         .set_oplock_level = smb3_set_oplock_level,
1728         .create_lease_buf = smb3_create_lease_buf,
1729         .parse_lease_buf = smb3_parse_lease_buf,
1730         .clone_range = smb2_clone_range,
1731         .duplicate_extents = smb2_duplicate_extents,
1732         .validate_negotiate = smb3_validate_negotiate,
1733         .wp_retry_size = smb2_wp_retry_size,
1734         .dir_needs_close = smb2_dir_needs_close,
1735         .fallocate = smb3_fallocate,
1736 };
1737
1738 #ifdef CONFIG_CIFS_SMB311
1739 struct smb_version_operations smb311_operations = {
1740         .compare_fids = smb2_compare_fids,
1741         .setup_request = smb2_setup_request,
1742         .setup_async_request = smb2_setup_async_request,
1743         .check_receive = smb2_check_receive,
1744         .add_credits = smb2_add_credits,
1745         .set_credits = smb2_set_credits,
1746         .get_credits_field = smb2_get_credits_field,
1747         .get_credits = smb2_get_credits,
1748         .wait_mtu_credits = smb2_wait_mtu_credits,
1749         .get_next_mid = smb2_get_next_mid,
1750         .read_data_offset = smb2_read_data_offset,
1751         .read_data_length = smb2_read_data_length,
1752         .map_error = map_smb2_to_linux_error,
1753         .find_mid = smb2_find_mid,
1754         .check_message = smb2_check_message,
1755         .dump_detail = smb2_dump_detail,
1756         .clear_stats = smb2_clear_stats,
1757         .print_stats = smb2_print_stats,
1758         .dump_share_caps = smb2_dump_share_caps,
1759         .is_oplock_break = smb2_is_valid_oplock_break,
1760         .downgrade_oplock = smb2_downgrade_oplock,
1761         .need_neg = smb2_need_neg,
1762         .negotiate = smb2_negotiate,
1763         .negotiate_wsize = smb2_negotiate_wsize,
1764         .negotiate_rsize = smb2_negotiate_rsize,
1765         .sess_setup = SMB2_sess_setup,
1766         .logoff = SMB2_logoff,
1767         .tree_connect = SMB2_tcon,
1768         .tree_disconnect = SMB2_tdis,
1769         .qfs_tcon = smb3_qfs_tcon,
1770         .is_path_accessible = smb2_is_path_accessible,
1771         .can_echo = smb2_can_echo,
1772         .echo = SMB2_echo,
1773         .query_path_info = smb2_query_path_info,
1774         .get_srv_inum = smb2_get_srv_inum,
1775         .query_file_info = smb2_query_file_info,
1776         .set_path_size = smb2_set_path_size,
1777         .set_file_size = smb2_set_file_size,
1778         .set_file_info = smb2_set_file_info,
1779         .set_compression = smb2_set_compression,
1780         .mkdir = smb2_mkdir,
1781         .mkdir_setinfo = smb2_mkdir_setinfo,
1782         .rmdir = smb2_rmdir,
1783         .unlink = smb2_unlink,
1784         .rename = smb2_rename_path,
1785         .create_hardlink = smb2_create_hardlink,
1786         .query_symlink = smb2_query_symlink,
1787         .query_mf_symlink = smb3_query_mf_symlink,
1788         .create_mf_symlink = smb3_create_mf_symlink,
1789         .open = smb2_open_file,
1790         .set_fid = smb2_set_fid,
1791         .close = smb2_close_file,
1792         .flush = smb2_flush_file,
1793         .async_readv = smb2_async_readv,
1794         .async_writev = smb2_async_writev,
1795         .sync_read = smb2_sync_read,
1796         .sync_write = smb2_sync_write,
1797         .query_dir_first = smb2_query_dir_first,
1798         .query_dir_next = smb2_query_dir_next,
1799         .close_dir = smb2_close_dir,
1800         .calc_smb_size = smb2_calc_size,
1801         .is_status_pending = smb2_is_status_pending,
1802         .oplock_response = smb2_oplock_response,
1803         .queryfs = smb2_queryfs,
1804         .mand_lock = smb2_mand_lock,
1805         .mand_unlock_range = smb2_unlock_range,
1806         .push_mand_locks = smb2_push_mandatory_locks,
1807         .get_lease_key = smb2_get_lease_key,
1808         .set_lease_key = smb2_set_lease_key,
1809         .new_lease_key = smb2_new_lease_key,
1810         .generate_signingkey = generate_smb3signingkey,
1811         .calc_signature = smb3_calc_signature,
1812         .set_integrity  = smb3_set_integrity,
1813         .is_read_op = smb21_is_read_op,
1814         .set_oplock_level = smb3_set_oplock_level,
1815         .create_lease_buf = smb3_create_lease_buf,
1816         .parse_lease_buf = smb3_parse_lease_buf,
1817         .clone_range = smb2_clone_range,
1818         .duplicate_extents = smb2_duplicate_extents,
1819 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1820         .wp_retry_size = smb2_wp_retry_size,
1821         .dir_needs_close = smb2_dir_needs_close,
1822         .fallocate = smb3_fallocate,
1823 };
1824 #endif /* CIFS_SMB311 */
1825
1826 struct smb_version_values smb20_values = {
1827         .version_string = SMB20_VERSION_STRING,
1828         .protocol_id = SMB20_PROT_ID,
1829         .req_capabilities = 0, /* MBZ */
1830         .large_lock_type = 0,
1831         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1832         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1833         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1834         .header_size = sizeof(struct smb2_hdr),
1835         .max_header_size = MAX_SMB2_HDR_SIZE,
1836         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1837         .lock_cmd = SMB2_LOCK,
1838         .cap_unix = 0,
1839         .cap_nt_find = SMB2_NT_FIND,
1840         .cap_large_files = SMB2_LARGE_FILES,
1841         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1842         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1843         .create_lease_size = sizeof(struct create_lease),
1844 };
1845
1846 struct smb_version_values smb21_values = {
1847         .version_string = SMB21_VERSION_STRING,
1848         .protocol_id = SMB21_PROT_ID,
1849         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1850         .large_lock_type = 0,
1851         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1852         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1853         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1854         .header_size = sizeof(struct smb2_hdr),
1855         .max_header_size = MAX_SMB2_HDR_SIZE,
1856         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1857         .lock_cmd = SMB2_LOCK,
1858         .cap_unix = 0,
1859         .cap_nt_find = SMB2_NT_FIND,
1860         .cap_large_files = SMB2_LARGE_FILES,
1861         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1862         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1863         .create_lease_size = sizeof(struct create_lease),
1864 };
1865
1866 struct smb_version_values smb30_values = {
1867         .version_string = SMB30_VERSION_STRING,
1868         .protocol_id = SMB30_PROT_ID,
1869         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1870         .large_lock_type = 0,
1871         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1872         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1873         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1874         .header_size = sizeof(struct smb2_hdr),
1875         .max_header_size = MAX_SMB2_HDR_SIZE,
1876         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1877         .lock_cmd = SMB2_LOCK,
1878         .cap_unix = 0,
1879         .cap_nt_find = SMB2_NT_FIND,
1880         .cap_large_files = SMB2_LARGE_FILES,
1881         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1882         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1883         .create_lease_size = sizeof(struct create_lease_v2),
1884 };
1885
1886 struct smb_version_values smb302_values = {
1887         .version_string = SMB302_VERSION_STRING,
1888         .protocol_id = SMB302_PROT_ID,
1889         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1890         .large_lock_type = 0,
1891         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1892         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1893         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1894         .header_size = sizeof(struct smb2_hdr),
1895         .max_header_size = MAX_SMB2_HDR_SIZE,
1896         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1897         .lock_cmd = SMB2_LOCK,
1898         .cap_unix = 0,
1899         .cap_nt_find = SMB2_NT_FIND,
1900         .cap_large_files = SMB2_LARGE_FILES,
1901         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1902         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1903         .create_lease_size = sizeof(struct create_lease_v2),
1904 };
1905
1906 #ifdef CONFIG_CIFS_SMB311
1907 struct smb_version_values smb311_values = {
1908         .version_string = SMB311_VERSION_STRING,
1909         .protocol_id = SMB311_PROT_ID,
1910         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1911         .large_lock_type = 0,
1912         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1913         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1914         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1915         .header_size = sizeof(struct smb2_hdr),
1916         .max_header_size = MAX_SMB2_HDR_SIZE,
1917         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1918         .lock_cmd = SMB2_LOCK,
1919         .cap_unix = 0,
1920         .cap_nt_find = SMB2_NT_FIND,
1921         .cap_large_files = SMB2_LARGE_FILES,
1922         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1923         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1924         .create_lease_size = sizeof(struct create_lease_v2),
1925 };
1926 #endif /* SMB311 */