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         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 186                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 187                 return NULL;
 188         }
 189
 190         spin_lock(&GlobalMid_Lock);
 191         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 192                 if ((mid->mid == wire_mid) &&
 193                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 194                     (mid->command == hdr->Command)) {
 195                         spin_unlock(&GlobalMid_Lock);
 196                         return mid;
 197                 }
 198         }
 199         spin_unlock(&GlobalMid_Lock);
 200         return NULL;
 201 }
 202
 203 static void
 204 smb2_dump_detail(void *buf)
 205 {
 206 #ifdef CONFIG_CIFS_DEBUG2
 207         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 208
 209         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 210                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 211                  smb->ProcessId);
 212         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 213 #endif
 214 }
 215
 216 static bool
 217 smb2_need_neg(struct TCP_Server_Info *server)
 218 {
 219         return server->max_read == 0;
 220 }
 221
 222 static int
 223 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 224 {
 225         int rc;
 226         ses->server->CurrentMid = 0;
 227         rc = SMB2_negotiate(xid, ses);
 228         /* BB we probably don't need to retry with modern servers */
 229         if (rc == -EAGAIN)
 230                 rc = -EHOSTDOWN;
 231         return rc;
 232 }
 233
 234 static unsigned int
 235 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 236 {
 237         struct TCP_Server_Info *server = tcon->ses->server;
 238         unsigned int wsize;
 239
 240         /* start with specified wsize, or default */
 241         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 242         wsize = min_t(unsigned int, wsize, server->max_write);
 243
 244         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 245                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 246
 247         return wsize;
 248 }
 249
 250 static unsigned int
 251 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 252 {
 253         struct TCP_Server_Info *server = tcon->ses->server;
 254         unsigned int rsize;
 255
 256         /* start with specified rsize, or default */
 257         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 258         rsize = min_t(unsigned int, rsize, server->max_read);
 259
 260         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 261                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 262
 263         return rsize;
 264 }
 265
 266 #ifdef CONFIG_CIFS_STATS2
 267 static int
 268 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 269 {
 270         int rc;
 271         unsigned int ret_data_len = 0;
 272         struct network_interface_info_ioctl_rsp *out_buf;
 273
 274         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 275                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 276                         NULL /* no data input */, 0 /* no data input */,
 277                         (char **)&out_buf, &ret_data_len);
 278         if (rc != 0)
 279                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 280         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 281                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 282                 rc = -EINVAL;
 283         } else {
 284                 /* Dump info on first interface */
 285                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 286                         le32_to_cpu(out_buf->Capability));
 287                 cifs_dbg(FYI, "Link Speed %lld\n",
 288                         le64_to_cpu(out_buf->LinkSpeed));
 289         }
 290
 291         return rc;
 292 }
 293 #endif /* STATS2 */
 294
 295 static void
 296 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 297 {
 298         int rc;
 299         __le16 srch_path = 0; /* Null - open root of share */
 300         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 301         struct cifs_open_parms oparms;
 302         struct cifs_fid fid;
 303
 304         oparms.tcon = tcon;
 305         oparms.desired_access = FILE_READ_ATTRIBUTES;
 306         oparms.disposition = FILE_OPEN;
 307         oparms.create_options = 0;
 308         oparms.fid = &fid;
 309         oparms.reconnect = false;
 310
 311         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 312         if (rc)
 313                 return;
 314
 315 #ifdef CONFIG_CIFS_STATS2
 316         SMB3_request_interfaces(xid, tcon);
 317 #endif /* STATS2 */
 318
 319         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 320                         FS_ATTRIBUTE_INFORMATION);
 321         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 322                         FS_DEVICE_INFORMATION);
 323         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 324                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 325         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 326         return;
 327 }
 328
 329 static void
 330 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 331 {
 332         int rc;
 333         __le16 srch_path = 0; /* Null - open root of share */
 334         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 335         struct cifs_open_parms oparms;
 336         struct cifs_fid fid;
 337
 338         oparms.tcon = tcon;
 339         oparms.desired_access = FILE_READ_ATTRIBUTES;
 340         oparms.disposition = FILE_OPEN;
 341         oparms.create_options = 0;
 342         oparms.fid = &fid;
 343         oparms.reconnect = false;
 344
 345         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 346         if (rc)
 347                 return;
 348
 349         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 350                         FS_ATTRIBUTE_INFORMATION);
 351         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 352                         FS_DEVICE_INFORMATION);
 353         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 354         return;
 355 }
 356
 357 static int
 358 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 359                         struct cifs_sb_info *cifs_sb, const char *full_path)
 360 {
 361         int rc;
 362         __le16 *utf16_path;
 363         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 364         struct cifs_open_parms oparms;
 365         struct cifs_fid fid;
 366
 367         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 368         if (!utf16_path)
 369                 return -ENOMEM;
 370
 371         oparms.tcon = tcon;
 372         oparms.desired_access = FILE_READ_ATTRIBUTES;
 373         oparms.disposition = FILE_OPEN;
 374         oparms.create_options = 0;
 375         oparms.fid = &fid;
 376         oparms.reconnect = false;
 377
 378         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 379         if (rc) {
 380                 kfree(utf16_path);
 381                 return rc;
 382         }
 383
 384         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 385         kfree(utf16_path);
 386         return rc;
 387 }
 388
 389 static int
 390 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 391                   struct cifs_sb_info *cifs_sb, const char *full_path,
 392                   u64 *uniqueid, FILE_ALL_INFO *data)
 393 {
 394         *uniqueid = le64_to_cpu(data->IndexNumber);
 395         return 0;
 396 }
 397
 398 static int
 399 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 400                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 401 {
 402         int rc;
 403         struct smb2_file_all_info *smb2_data;
 404
 405         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 406                             GFP_KERNEL);
 407         if (smb2_data == NULL)
 408                 return -ENOMEM;
 409
 410         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 411                              smb2_data);
 412         if (!rc)
 413                 move_smb2_info_to_cifs(data, smb2_data);
 414         kfree(smb2_data);
 415         return rc;
 416 }
 417
 418 static bool
 419 smb2_can_echo(struct TCP_Server_Info *server)
 420 {
 421         return server->echoes;
 422 }
 423
 424 static void
 425 smb2_clear_stats(struct cifs_tcon *tcon)
 426 {
 427 #ifdef CONFIG_CIFS_STATS
 428         int i;
 429         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 430                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 431                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 432         }
 433 #endif
 434 }
 435
 436 static void
 437 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 438 {
 439         seq_puts(m, "\n\tShare Capabilities:");
 440         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 441                 seq_puts(m, " DFS,");
 442         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 443                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 444         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 445                 seq_puts(m, " SCALEOUT,");
 446         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 447                 seq_puts(m, " CLUSTER,");
 448         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 449                 seq_puts(m, " ASYMMETRIC,");
 450         if (tcon->capabilities == 0)
 451                 seq_puts(m, " None");
 452         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 453                 seq_puts(m, " Aligned,");
 454         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 455                 seq_puts(m, " Partition Aligned,");
 456         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 457                 seq_puts(m, " SSD,");
 458         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 459                 seq_puts(m, " TRIM-support,");
 460
 461         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 462         if (tcon->perf_sector_size)
 463                 seq_printf(m, "\tOptimal sector size: 0x%x",
 464                            tcon->perf_sector_size);
 465 }
 466
 467 static void
 468 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 469 {
 470 #ifdef CONFIG_CIFS_STATS
 471         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 472         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 473         seq_printf(m, "\nNegotiates: %d sent %d failed",
 474                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 475                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 476         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 477                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 478                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 479         seq_printf(m, "\nLogoffs: %d sent %d failed",
 480                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 481                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 482         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 483                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 484                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 485         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 486                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 487                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 488         seq_printf(m, "\nCreates: %d sent %d failed",
 489                    atomic_read(&sent[SMB2_CREATE_HE]),
 490                    atomic_read(&failed[SMB2_CREATE_HE]));
 491         seq_printf(m, "\nCloses: %d sent %d failed",
 492                    atomic_read(&sent[SMB2_CLOSE_HE]),
 493                    atomic_read(&failed[SMB2_CLOSE_HE]));
 494         seq_printf(m, "\nFlushes: %d sent %d failed",
 495                    atomic_read(&sent[SMB2_FLUSH_HE]),
 496                    atomic_read(&failed[SMB2_FLUSH_HE]));
 497         seq_printf(m, "\nReads: %d sent %d failed",
 498                    atomic_read(&sent[SMB2_READ_HE]),
 499                    atomic_read(&failed[SMB2_READ_HE]));
 500         seq_printf(m, "\nWrites: %d sent %d failed",
 501                    atomic_read(&sent[SMB2_WRITE_HE]),
 502                    atomic_read(&failed[SMB2_WRITE_HE]));
 503         seq_printf(m, "\nLocks: %d sent %d failed",
 504                    atomic_read(&sent[SMB2_LOCK_HE]),
 505                    atomic_read(&failed[SMB2_LOCK_HE]));
 506         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 507                    atomic_read(&sent[SMB2_IOCTL_HE]),
 508                    atomic_read(&failed[SMB2_IOCTL_HE]));
 509         seq_printf(m, "\nCancels: %d sent %d failed",
 510                    atomic_read(&sent[SMB2_CANCEL_HE]),
 511                    atomic_read(&failed[SMB2_CANCEL_HE]));
 512         seq_printf(m, "\nEchos: %d sent %d failed",
 513                    atomic_read(&sent[SMB2_ECHO_HE]),
 514                    atomic_read(&failed[SMB2_ECHO_HE]));
 515         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 516                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 517                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 518         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 519                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 520                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 521         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 522                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 523                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 524         seq_printf(m, "\nSetInfos: %d sent %d failed",
 525                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 526                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 527         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 528                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 529                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 530 #endif
 531 }
 532
 533 static void
 534 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 535 {
 536         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 537         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 538
 539         cfile->fid.persistent_fid = fid->persistent_fid;
 540         cfile->fid.volatile_fid = fid->volatile_fid;
 541         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 542                                       &fid->purge_cache);
 543         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 544 }
 545
 546 static void
 547 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 548                 struct cifs_fid *fid)
 549 {
 550         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 551 }
 552
 553 static int
 554 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 555                      u64 persistent_fid, u64 volatile_fid,
 556                      struct copychunk_ioctl *pcchunk)
 557 {
 558         int rc;
 559         unsigned int ret_data_len;
 560         struct resume_key_req *res_key;
 561
 562         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 563                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 564                         NULL, 0 /* no input */,
 565                         (char **)&res_key, &ret_data_len);
 566
 567         if (rc) {
 568                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 569                 goto req_res_key_exit;
 570         }
 571         if (ret_data_len < sizeof(struct resume_key_req)) {
 572                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 573                 rc = -EINVAL;
 574                 goto req_res_key_exit;
 575         }
 576         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 577
 578 req_res_key_exit:
 579         kfree(res_key);
 580         return rc;
 581 }
 582
 583 static int
 584 smb2_clone_range(const unsigned int xid,
 585                         struct cifsFileInfo *srcfile,
 586                         struct cifsFileInfo *trgtfile, u64 src_off,
 587                         u64 len, u64 dest_off)
 588 {
 589         int rc;
 590         unsigned int ret_data_len;
 591         struct copychunk_ioctl *pcchunk;
 592         struct copychunk_ioctl_rsp *retbuf = NULL;
 593         struct cifs_tcon *tcon;
 594         int chunks_copied = 0;
 595         bool chunk_sizes_updated = false;
 596
 597         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 598
 599         if (pcchunk == NULL)
 600                 return -ENOMEM;
 601
 602         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 603         /* Request a key from the server to identify the source of the copy */
 604         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 605                                 srcfile->fid.persistent_fid,
 606                                 srcfile->fid.volatile_fid, pcchunk);
 607
 608         /* Note: request_res_key sets res_key null only if rc !=0 */
 609         if (rc)
 610                 goto cchunk_out;
 611
 612         /* For now array only one chunk long, will make more flexible later */
 613         pcchunk->ChunkCount = cpu_to_le32(1);
 614         pcchunk->Reserved = 0;
 615         pcchunk->Reserved2 = 0;
 616
 617         tcon = tlink_tcon(trgtfile->tlink);
 618
 619         while (len > 0) {
 620                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 621                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 622                 pcchunk->Length =
 623                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 624
 625                 /* Request server copy to target from src identified by key */
 626                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 627                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 628                         true /* is_fsctl */, (char *)pcchunk,
 629                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 630                         &ret_data_len);
 631                 if (rc == 0) {
 632                         if (ret_data_len !=
 633                                         sizeof(struct copychunk_ioctl_rsp)) {
 634                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 635                                 rc = -EIO;
 636                                 goto cchunk_out;
 637                         }
 638                         if (retbuf->TotalBytesWritten == 0) {
 639                                 cifs_dbg(FYI, "no bytes copied\n");
 640                                 rc = -EIO;
 641                                 goto cchunk_out;
 642                         }
 643                         /*
 644                          * Check if server claimed to write more than we asked
 645                          */
 646                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 647                             le32_to_cpu(pcchunk->Length)) {
 648                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 649                                 rc = -EIO;
 650                                 goto cchunk_out;
 651                         }
 652                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 653                                 cifs_dbg(VFS, "invalid num chunks written\n");
 654                                 rc = -EIO;
 655                                 goto cchunk_out;
 656                         }
 657                         chunks_copied++;
 658
 659                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 660                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 661                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 662
 663                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 664                                 le32_to_cpu(retbuf->ChunksWritten),
 665                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 666                                 le32_to_cpu(retbuf->TotalBytesWritten));
 667                 } else if (rc == -EINVAL) {
 668                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 669                                 goto cchunk_out;
 670
 671                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 672                                 le32_to_cpu(retbuf->ChunksWritten),
 673                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 674                                 le32_to_cpu(retbuf->TotalBytesWritten));
 675
 676                         /*
 677                          * Check if this is the first request using these sizes,
 678                          * (ie check if copy succeed once with original sizes
 679                          * and check if the server gave us different sizes after
 680                          * we already updated max sizes on previous request).
 681                          * if not then why is the server returning an error now
 682                          */
 683                         if ((chunks_copied != 0) || chunk_sizes_updated)
 684                                 goto cchunk_out;
 685
 686                         /* Check that server is not asking us to grow size */
 687                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 688                                         tcon->max_bytes_chunk)
 689                                 tcon->max_bytes_chunk =
 690                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 691                         else
 692                                 goto cchunk_out; /* server gave us bogus size */
 693
 694                         /* No need to change MaxChunks since already set to 1 */
 695                         chunk_sizes_updated = true;
 696                 } else
 697                         goto cchunk_out;
 698         }
 699
 700 cchunk_out:
 701         kfree(pcchunk);
 702         return rc;
 703 }
 704
 705 static int
 706 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 707                 struct cifs_fid *fid)
 708 {
 709         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 710 }
 711
 712 static unsigned int
 713 smb2_read_data_offset(char *buf)
 714 {
 715         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 716         return rsp->DataOffset;
 717 }
 718
 719 static unsigned int
 720 smb2_read_data_length(char *buf)
 721 {
 722         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 723         return le32_to_cpu(rsp->DataLength);
 724 }
 725
 726
 727 static int
 728 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 729                struct cifs_io_parms *parms, unsigned int *bytes_read,
 730                char **buf, int *buf_type)
 731 {
 732         parms->persistent_fid = pfid->persistent_fid;
 733         parms->volatile_fid = pfid->volatile_fid;
 734         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 735 }
 736
 737 static int
 738 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 739                 struct cifs_io_parms *parms, unsigned int *written,
 740                 struct kvec *iov, unsigned long nr_segs)
 741 {
 742
 743         parms->persistent_fid = pfid->persistent_fid;
 744         parms->volatile_fid = pfid->volatile_fid;
 745         return SMB2_write(xid, parms, written, iov, nr_segs);
 746 }
 747
 748 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 749 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 750                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 751 {
 752         struct cifsInodeInfo *cifsi;
 753         int rc;
 754
 755         cifsi = CIFS_I(inode);
 756
 757         /* if file already sparse don't bother setting sparse again */
 758         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 759                 return true; /* already sparse */
 760
 761         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 762                 return true; /* already not sparse */
 763
 764         /*
 765          * Can't check for sparse support on share the usual way via the
 766          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 767          * since Samba server doesn't set the flag on the share, yet
 768          * supports the set sparse FSCTL and returns sparse correctly
 769          * in the file attributes. If we fail setting sparse though we
 770          * mark that server does not support sparse files for this share
 771          * to avoid repeatedly sending the unsupported fsctl to server
 772          * if the file is repeatedly extended.
 773          */
 774         if (tcon->broken_sparse_sup)
 775                 return false;
 776
 777         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 778                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 779                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 780         if (rc) {
 781                 tcon->broken_sparse_sup = true;
 782                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 783                 return false;
 784         }
 785
 786         if (setsparse)
 787                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 788         else
 789                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 790
 791         return true;
 792 }
 793
 794 static int
 795 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 796                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 797 {
 798         __le64 eof = cpu_to_le64(size);
 799         struct inode *inode;
 800
 801         /*
 802          * If extending file more than one page make sparse. Many Linux fs
 803          * make files sparse by default when extending via ftruncate
 804          */
 805         inode = d_inode(cfile->dentry);
 806
 807         if (!set_alloc && (size > inode->i_size + 8192)) {
 808                 __u8 set_sparse = 1;
 809
 810                 /* whether set sparse succeeds or not, extend the file */
 811                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 812         }
 813
 814         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 815                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 816 }
 817
 818 static int
 819 smb2_duplicate_extents(const unsigned int xid,
 820                         struct cifsFileInfo *srcfile,
 821                         struct cifsFileInfo *trgtfile, u64 src_off,
 822                         u64 len, u64 dest_off)
 823 {
 824         int rc;
 825         unsigned int ret_data_len;
 826         char *retbuf = NULL;
 827         struct duplicate_extents_to_file dup_ext_buf;
 828         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 829
 830         /* server fileays advertise duplicate extent support with this flag */
 831         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 832              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 833                 return -EOPNOTSUPP;
 834
 835         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 836         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 837         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 838         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 839         dup_ext_buf.ByteCount = cpu_to_le64(len);
 840         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 841                 src_off, dest_off, len);
 842
 843         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 844         if (rc)
 845                 goto duplicate_extents_out;
 846
 847         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 848                         trgtfile->fid.volatile_fid,
 849                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 850                         true /* is_fsctl */, (char *)&dup_ext_buf,
 851                         sizeof(struct duplicate_extents_to_file),
 852                         (char **)&retbuf,
 853                         &ret_data_len);
 854
 855         if (ret_data_len > 0)
 856                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 857
 858 duplicate_extents_out:
 859         return rc;
 860 }
 861
 862 static int
 863 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 864                    struct cifsFileInfo *cfile)
 865 {
 866         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 867                             cfile->fid.volatile_fid);
 868 }
 869
 870 static int
 871 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 872                    struct cifsFileInfo *cfile)
 873 {
 874         struct fsctl_set_integrity_information_req integr_info;
 875         char *retbuf = NULL;
 876         unsigned int ret_data_len;
 877
 878         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 879         integr_info.Flags = 0;
 880         integr_info.Reserved = 0;
 881
 882         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 883                         cfile->fid.volatile_fid,
 884                         FSCTL_SET_INTEGRITY_INFORMATION,
 885                         true /* is_fsctl */, (char *)&integr_info,
 886                         sizeof(struct fsctl_set_integrity_information_req),
 887                         (char **)&retbuf,
 888                         &ret_data_len);
 889
 890 }
 891
 892 static int
 893 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 894                      const char *path, struct cifs_sb_info *cifs_sb,
 895                      struct cifs_fid *fid, __u16 search_flags,
 896                      struct cifs_search_info *srch_inf)
 897 {
 898         __le16 *utf16_path;
 899         int rc;
 900         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 901         struct cifs_open_parms oparms;
 902
 903         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 904         if (!utf16_path)
 905                 return -ENOMEM;
 906
 907         oparms.tcon = tcon;
 908         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 909         oparms.disposition = FILE_OPEN;
 910         oparms.create_options = 0;
 911         oparms.fid = fid;
 912         oparms.reconnect = false;
 913
 914         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 915         kfree(utf16_path);
 916         if (rc) {
 917                 cifs_dbg(VFS, "open dir failed\n");
 918                 return rc;
 919         }
 920
 921         srch_inf->entries_in_buffer = 0;
 922         srch_inf->index_of_last_entry = 0;
 923
 924         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 925                                   fid->volatile_fid, 0, srch_inf);
 926         if (rc) {
 927                 cifs_dbg(VFS, "query directory failed\n");
 928                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 929         }
 930         return rc;
 931 }
 932
 933 static int
 934 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 935                     struct cifs_fid *fid, __u16 search_flags,
 936                     struct cifs_search_info *srch_inf)
 937 {
 938         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 939                                     fid->volatile_fid, 0, srch_inf);
 940 }
 941
 942 static int
 943 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 944                struct cifs_fid *fid)
 945 {
 946         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 947 }
 948
 949 /*
 950 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 951 * the number of credits and return true. Otherwise - return false.
 952 */
 953 static bool
 954 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 955 {
 956         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 957
 958         if (hdr->Status != STATUS_PENDING)
 959                 return false;
 960
 961         if (!length) {
 962                 spin_lock(&server->req_lock);
 963                 server->credits += le16_to_cpu(hdr->CreditRequest);
 964                 spin_unlock(&server->req_lock);
 965                 wake_up(&server->request_q);
 966         }
 967
 968         return true;
 969 }
 970
 971 static int
 972 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 973                      struct cifsInodeInfo *cinode)
 974 {
 975         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 976                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 977                                         smb2_get_lease_state(cinode));
 978
 979         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 980                                  fid->volatile_fid,
 981                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 982 }
 983
 984 static int
 985 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 986              struct kstatfs *buf)
 987 {
 988         int rc;
 989         __le16 srch_path = 0; /* Null - open root of share */
 990         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 991         struct cifs_open_parms oparms;
 992         struct cifs_fid fid;
 993
 994         oparms.tcon = tcon;
 995         oparms.desired_access = FILE_READ_ATTRIBUTES;
 996         oparms.disposition = FILE_OPEN;
 997         oparms.create_options = 0;
 998         oparms.fid = &fid;
 999         oparms.reconnect = false;
1000
1001         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1002         if (rc)
1003                 return rc;
1004         buf->f_type = SMB2_MAGIC_NUMBER;
1005         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1006                            buf);
1007         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1008         return rc;
1009 }
1010
1011 static bool
1012 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1013 {
1014         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1015                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1016 }
1017
1018 static int
1019 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1020                __u64 length, __u32 type, int lock, int unlock, bool wait)
1021 {
1022         if (unlock && !lock)
1023                 type = SMB2_LOCKFLAG_UNLOCK;
1024         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1025                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1026                          current->tgid, length, offset, type, wait);
1027 }
1028
1029 static void
1030 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1031 {
1032         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1033 }
1034
1035 static void
1036 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1037 {
1038         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1039 }
1040
1041 static void
1042 smb2_new_lease_key(struct cifs_fid *fid)
1043 {
1044         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1045 }
1046
1047 #define SMB2_SYMLINK_STRUCT_SIZE \
1048         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1049
1050 static int
1051 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1052                    const char *full_path, char **target_path,
1053                    struct cifs_sb_info *cifs_sb)
1054 {
1055         int rc;
1056         __le16 *utf16_path;
1057         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1058         struct cifs_open_parms oparms;
1059         struct cifs_fid fid;
1060         struct smb2_err_rsp *err_buf = NULL;
1061         struct smb2_symlink_err_rsp *symlink;
1062         unsigned int sub_len;
1063         unsigned int sub_offset;
1064         unsigned int print_len;
1065         unsigned int print_offset;
1066
1067         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1068
1069         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1070         if (!utf16_path)
1071                 return -ENOMEM;
1072
1073         oparms.tcon = tcon;
1074         oparms.desired_access = FILE_READ_ATTRIBUTES;
1075         oparms.disposition = FILE_OPEN;
1076         oparms.create_options = 0;
1077         oparms.fid = &fid;
1078         oparms.reconnect = false;
1079
1080         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1081
1082         if (!rc || !err_buf) {
1083                 kfree(utf16_path);
1084                 return -ENOENT;
1085         }
1086
1087         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1088             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1089                 kfree(utf16_path);
1090                 return -ENOENT;
1091         }
1092
1093         /* open must fail on symlink - reset rc */
1094         rc = 0;
1095         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1096         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1097         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1098         print_len = le16_to_cpu(symlink->PrintNameLength);
1099         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1100
1101         if (get_rfc1002_length(err_buf) + 4 <
1102                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1103                 kfree(utf16_path);
1104                 return -ENOENT;
1105         }
1106
1107         if (get_rfc1002_length(err_buf) + 4 <
1108                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1109                 kfree(utf16_path);
1110                 return -ENOENT;
1111         }
1112
1113         *target_path = cifs_strndup_from_utf16(
1114                                 (char *)symlink->PathBuffer + sub_offset,
1115                                 sub_len, true, cifs_sb->local_nls);
1116         if (!(*target_path)) {
1117                 kfree(utf16_path);
1118                 return -ENOMEM;
1119         }
1120         convert_delimiter(*target_path, '/');
1121         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1122         kfree(utf16_path);
1123         return rc;
1124 }
1125
1126 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1127                             loff_t offset, loff_t len, bool keep_size)
1128 {
1129         struct inode *inode;
1130         struct cifsInodeInfo *cifsi;
1131         struct cifsFileInfo *cfile = file->private_data;
1132         struct file_zero_data_information fsctl_buf;
1133         long rc;
1134         unsigned int xid;
1135
1136         xid = get_xid();
1137
1138         inode = d_inode(cfile->dentry);
1139         cifsi = CIFS_I(inode);
1140
1141         /* if file not oplocked can't be sure whether asking to extend size */
1142         if (!CIFS_CACHE_READ(cifsi))
1143                 if (keep_size == false)
1144                         return -EOPNOTSUPP;
1145
1146         /*
1147          * Must check if file sparse since fallocate -z (zero range) assumes
1148          * non-sparse allocation
1149          */
1150         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1151                 return -EOPNOTSUPP;
1152
1153         /*
1154          * need to make sure we are not asked to extend the file since the SMB3
1155          * fsctl does not change the file size. In the future we could change
1156          * this to zero the first part of the range then set the file size
1157          * which for a non sparse file would zero the newly extended range
1158          */
1159         if (keep_size == false)
1160                 if (i_size_read(inode) < offset + len)
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_punch_hole(struct file *file, struct cifs_tcon *tcon,
1177                             loff_t offset, loff_t len)
1178 {
1179         struct inode *inode;
1180         struct cifsInodeInfo *cifsi;
1181         struct cifsFileInfo *cfile = file->private_data;
1182         struct file_zero_data_information fsctl_buf;
1183         long rc;
1184         unsigned int xid;
1185         __u8 set_sparse = 1;
1186
1187         xid = get_xid();
1188
1189         inode = d_inode(cfile->dentry);
1190         cifsi = CIFS_I(inode);
1191
1192         /* Need to make file sparse, if not already, before freeing range. */
1193         /* Consider adding equivalent for compressed since it could also work */
1194         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1195                 return -EOPNOTSUPP;
1196
1197         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1198
1199         fsctl_buf.FileOffset = cpu_to_le64(offset);
1200         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1201
1202         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1203                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1204                         true /* is_fctl */, (char *)&fsctl_buf,
1205                         sizeof(struct file_zero_data_information), NULL, NULL);
1206         free_xid(xid);
1207         return rc;
1208 }
1209
1210 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1211                             loff_t off, loff_t len, bool keep_size)
1212 {
1213         struct inode *inode;
1214         struct cifsInodeInfo *cifsi;
1215         struct cifsFileInfo *cfile = file->private_data;
1216         long rc = -EOPNOTSUPP;
1217         unsigned int xid;
1218
1219         xid = get_xid();
1220
1221         inode = d_inode(cfile->dentry);
1222         cifsi = CIFS_I(inode);
1223
1224         /* if file not oplocked can't be sure whether asking to extend size */
1225         if (!CIFS_CACHE_READ(cifsi))
1226                 if (keep_size == false)
1227                         return -EOPNOTSUPP;
1228
1229         /*
1230          * Files are non-sparse by default so falloc may be a no-op
1231          * Must check if file sparse. If not sparse, and not extending
1232          * then no need to do anything since file already allocated
1233          */
1234         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1235                 if (keep_size == true)
1236                         return 0;
1237                 /* check if extending file */
1238                 else if (i_size_read(inode) >= off + len)
1239                         /* not extending file and already not sparse */
1240                         return 0;
1241                 /* BB: in future add else clause to extend file */
1242                 else
1243                         return -EOPNOTSUPP;
1244         }
1245
1246         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1247                 /*
1248                  * Check if falloc starts within first few pages of file
1249                  * and ends within a few pages of the end of file to
1250                  * ensure that most of file is being forced to be
1251                  * fallocated now. If so then setting whole file sparse
1252                  * ie potentially making a few extra pages at the beginning
1253                  * or end of the file non-sparse via set_sparse is harmless.
1254                  */
1255                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1256                         return -EOPNOTSUPP;
1257
1258                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1259         }
1260         /* BB: else ... in future add code to extend file and set sparse */
1261
1262
1263         free_xid(xid);
1264         return rc;
1265 }
1266
1267
1268 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1269                            loff_t off, loff_t len)
1270 {
1271         /* KEEP_SIZE already checked for by do_fallocate */
1272         if (mode & FALLOC_FL_PUNCH_HOLE)
1273                 return smb3_punch_hole(file, tcon, off, len);
1274         else if (mode & FALLOC_FL_ZERO_RANGE) {
1275                 if (mode & FALLOC_FL_KEEP_SIZE)
1276                         return smb3_zero_range(file, tcon, off, len, true);
1277                 return smb3_zero_range(file, tcon, off, len, false);
1278         } else if (mode == FALLOC_FL_KEEP_SIZE)
1279                 return smb3_simple_falloc(file, tcon, off, len, true);
1280         else if (mode == 0)
1281                 return smb3_simple_falloc(file, tcon, off, len, false);
1282
1283         return -EOPNOTSUPP;
1284 }
1285
1286 static void
1287 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1288                         struct cifsInodeInfo *cinode, bool set_level2)
1289 {
1290         if (set_level2)
1291                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1292                                                 0, NULL);
1293         else
1294                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1295 }
1296
1297 static void
1298 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1299                       unsigned int epoch, bool *purge_cache)
1300 {
1301         oplock &= 0xFF;
1302         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1303                 return;
1304         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1305                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1306                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1307                          &cinode->vfs_inode);
1308         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1309                 cinode->oplock = CIFS_CACHE_RW_FLG;
1310                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1311                          &cinode->vfs_inode);
1312         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1313                 cinode->oplock = CIFS_CACHE_READ_FLG;
1314                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1315                          &cinode->vfs_inode);
1316         } else
1317                 cinode->oplock = 0;
1318 }
1319
1320 static void
1321 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1322                        unsigned int epoch, bool *purge_cache)
1323 {
1324         char message[5] = {0};
1325
1326         oplock &= 0xFF;
1327         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1328                 return;
1329
1330         cinode->oplock = 0;
1331         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1332                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1333                 strcat(message, "R");
1334         }
1335         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1336                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1337                 strcat(message, "H");
1338         }
1339         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1340                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1341                 strcat(message, "W");
1342         }
1343         if (!cinode->oplock)
1344                 strcat(message, "None");
1345         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1346                  &cinode->vfs_inode);
1347 }
1348
1349 static void
1350 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1351                       unsigned int epoch, bool *purge_cache)
1352 {
1353         unsigned int old_oplock = cinode->oplock;
1354
1355         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1356
1357         if (purge_cache) {
1358                 *purge_cache = false;
1359                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1360                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1361                             (epoch - cinode->epoch > 0))
1362                                 *purge_cache = true;
1363                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1364                                  (epoch - cinode->epoch > 1))
1365                                 *purge_cache = true;
1366                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1367                                  (epoch - cinode->epoch > 1))
1368                                 *purge_cache = true;
1369                         else if (cinode->oplock == 0 &&
1370                                  (epoch - cinode->epoch > 0))
1371                                 *purge_cache = true;
1372                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1373                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1374                             (epoch - cinode->epoch > 0))
1375                                 *purge_cache = true;
1376                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1377                                  (epoch - cinode->epoch > 1))
1378                                 *purge_cache = true;
1379                 }
1380                 cinode->epoch = epoch;
1381         }
1382 }
1383
1384 static bool
1385 smb2_is_read_op(__u32 oplock)
1386 {
1387         return oplock == SMB2_OPLOCK_LEVEL_II;
1388 }
1389
1390 static bool
1391 smb21_is_read_op(__u32 oplock)
1392 {
1393         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1394                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1395 }
1396
1397 static __le32
1398 map_oplock_to_lease(u8 oplock)
1399 {
1400         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1401                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1402         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1403                 return SMB2_LEASE_READ_CACHING;
1404         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1405                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1406                        SMB2_LEASE_WRITE_CACHING;
1407         return 0;
1408 }
1409
1410 static char *
1411 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1412 {
1413         struct create_lease *buf;
1414
1415         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1416         if (!buf)
1417                 return NULL;
1418
1419         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1420         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1421         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1422
1423         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1424                                         (struct create_lease, lcontext));
1425         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1426         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1427                                 (struct create_lease, Name));
1428         buf->ccontext.NameLength = cpu_to_le16(4);
1429         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1430         buf->Name[0] = 'R';
1431         buf->Name[1] = 'q';
1432         buf->Name[2] = 'L';
1433         buf->Name[3] = 's';
1434         return (char *)buf;
1435 }
1436
1437 static char *
1438 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1439 {
1440         struct create_lease_v2 *buf;
1441
1442         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1443         if (!buf)
1444                 return NULL;
1445
1446         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1447         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1448         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1449
1450         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1451                                         (struct create_lease_v2, lcontext));
1452         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1453         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1454                                 (struct create_lease_v2, Name));
1455         buf->ccontext.NameLength = cpu_to_le16(4);
1456         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1457         buf->Name[0] = 'R';
1458         buf->Name[1] = 'q';
1459         buf->Name[2] = 'L';
1460         buf->Name[3] = 's';
1461         return (char *)buf;
1462 }
1463
1464 static __u8
1465 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1466 {
1467         struct create_lease *lc = (struct create_lease *)buf;
1468
1469         *epoch = 0; /* not used */
1470         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1471                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1472         return le32_to_cpu(lc->lcontext.LeaseState);
1473 }
1474
1475 static __u8
1476 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1477 {
1478         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1479
1480         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1481         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1482                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1483         return le32_to_cpu(lc->lcontext.LeaseState);
1484 }
1485
1486 static unsigned int
1487 smb2_wp_retry_size(struct inode *inode)
1488 {
1489         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1490                      SMB2_MAX_BUFFER_SIZE);
1491 }
1492
1493 static bool
1494 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1495 {
1496         return !cfile->invalidHandle;
1497 }
1498
1499 struct smb_version_operations smb20_operations = {
1500         .compare_fids = smb2_compare_fids,
1501         .setup_request = smb2_setup_request,
1502         .setup_async_request = smb2_setup_async_request,
1503         .check_receive = smb2_check_receive,
1504         .add_credits = smb2_add_credits,
1505         .set_credits = smb2_set_credits,
1506         .get_credits_field = smb2_get_credits_field,
1507         .get_credits = smb2_get_credits,
1508         .wait_mtu_credits = cifs_wait_mtu_credits,
1509         .get_next_mid = smb2_get_next_mid,
1510         .read_data_offset = smb2_read_data_offset,
1511         .read_data_length = smb2_read_data_length,
1512         .map_error = map_smb2_to_linux_error,
1513         .find_mid = smb2_find_mid,
1514         .check_message = smb2_check_message,
1515         .dump_detail = smb2_dump_detail,
1516         .clear_stats = smb2_clear_stats,
1517         .print_stats = smb2_print_stats,
1518         .is_oplock_break = smb2_is_valid_oplock_break,
1519         .downgrade_oplock = smb2_downgrade_oplock,
1520         .need_neg = smb2_need_neg,
1521         .negotiate = smb2_negotiate,
1522         .negotiate_wsize = smb2_negotiate_wsize,
1523         .negotiate_rsize = smb2_negotiate_rsize,
1524         .sess_setup = SMB2_sess_setup,
1525         .logoff = SMB2_logoff,
1526         .tree_connect = SMB2_tcon,
1527         .tree_disconnect = SMB2_tdis,
1528         .qfs_tcon = smb2_qfs_tcon,
1529         .is_path_accessible = smb2_is_path_accessible,
1530         .can_echo = smb2_can_echo,
1531         .echo = SMB2_echo,
1532         .query_path_info = smb2_query_path_info,
1533         .get_srv_inum = smb2_get_srv_inum,
1534         .query_file_info = smb2_query_file_info,
1535         .set_path_size = smb2_set_path_size,
1536         .set_file_size = smb2_set_file_size,
1537         .set_file_info = smb2_set_file_info,
1538         .set_compression = smb2_set_compression,
1539         .mkdir = smb2_mkdir,
1540         .mkdir_setinfo = smb2_mkdir_setinfo,
1541         .rmdir = smb2_rmdir,
1542         .unlink = smb2_unlink,
1543         .rename = smb2_rename_path,
1544         .create_hardlink = smb2_create_hardlink,
1545         .query_symlink = smb2_query_symlink,
1546         .query_mf_symlink = smb3_query_mf_symlink,
1547         .create_mf_symlink = smb3_create_mf_symlink,
1548         .open = smb2_open_file,
1549         .set_fid = smb2_set_fid,
1550         .close = smb2_close_file,
1551         .flush = smb2_flush_file,
1552         .async_readv = smb2_async_readv,
1553         .async_writev = smb2_async_writev,
1554         .sync_read = smb2_sync_read,
1555         .sync_write = smb2_sync_write,
1556         .query_dir_first = smb2_query_dir_first,
1557         .query_dir_next = smb2_query_dir_next,
1558         .close_dir = smb2_close_dir,
1559         .calc_smb_size = smb2_calc_size,
1560         .is_status_pending = smb2_is_status_pending,
1561         .oplock_response = smb2_oplock_response,
1562         .queryfs = smb2_queryfs,
1563         .mand_lock = smb2_mand_lock,
1564         .mand_unlock_range = smb2_unlock_range,
1565         .push_mand_locks = smb2_push_mandatory_locks,
1566         .get_lease_key = smb2_get_lease_key,
1567         .set_lease_key = smb2_set_lease_key,
1568         .new_lease_key = smb2_new_lease_key,
1569         .calc_signature = smb2_calc_signature,
1570         .is_read_op = smb2_is_read_op,
1571         .set_oplock_level = smb2_set_oplock_level,
1572         .create_lease_buf = smb2_create_lease_buf,
1573         .parse_lease_buf = smb2_parse_lease_buf,
1574         .clone_range = smb2_clone_range,
1575         .wp_retry_size = smb2_wp_retry_size,
1576         .dir_needs_close = smb2_dir_needs_close,
1577 };
1578
1579 struct smb_version_operations smb21_operations = {
1580         .compare_fids = smb2_compare_fids,
1581         .setup_request = smb2_setup_request,
1582         .setup_async_request = smb2_setup_async_request,
1583         .check_receive = smb2_check_receive,
1584         .add_credits = smb2_add_credits,
1585         .set_credits = smb2_set_credits,
1586         .get_credits_field = smb2_get_credits_field,
1587         .get_credits = smb2_get_credits,
1588         .wait_mtu_credits = smb2_wait_mtu_credits,
1589         .get_next_mid = smb2_get_next_mid,
1590         .read_data_offset = smb2_read_data_offset,
1591         .read_data_length = smb2_read_data_length,
1592         .map_error = map_smb2_to_linux_error,
1593         .find_mid = smb2_find_mid,
1594         .check_message = smb2_check_message,
1595         .dump_detail = smb2_dump_detail,
1596         .clear_stats = smb2_clear_stats,
1597         .print_stats = smb2_print_stats,
1598         .is_oplock_break = smb2_is_valid_oplock_break,
1599         .downgrade_oplock = smb2_downgrade_oplock,
1600         .need_neg = smb2_need_neg,
1601         .negotiate = smb2_negotiate,
1602         .negotiate_wsize = smb2_negotiate_wsize,
1603         .negotiate_rsize = smb2_negotiate_rsize,
1604         .sess_setup = SMB2_sess_setup,
1605         .logoff = SMB2_logoff,
1606         .tree_connect = SMB2_tcon,
1607         .tree_disconnect = SMB2_tdis,
1608         .qfs_tcon = smb2_qfs_tcon,
1609         .is_path_accessible = smb2_is_path_accessible,
1610         .can_echo = smb2_can_echo,
1611         .echo = SMB2_echo,
1612         .query_path_info = smb2_query_path_info,
1613         .get_srv_inum = smb2_get_srv_inum,
1614         .query_file_info = smb2_query_file_info,
1615         .set_path_size = smb2_set_path_size,
1616         .set_file_size = smb2_set_file_size,
1617         .set_file_info = smb2_set_file_info,
1618         .set_compression = smb2_set_compression,
1619         .mkdir = smb2_mkdir,
1620         .mkdir_setinfo = smb2_mkdir_setinfo,
1621         .rmdir = smb2_rmdir,
1622         .unlink = smb2_unlink,
1623         .rename = smb2_rename_path,
1624         .create_hardlink = smb2_create_hardlink,
1625         .query_symlink = smb2_query_symlink,
1626         .query_mf_symlink = smb3_query_mf_symlink,
1627         .create_mf_symlink = smb3_create_mf_symlink,
1628         .open = smb2_open_file,
1629         .set_fid = smb2_set_fid,
1630         .close = smb2_close_file,
1631         .flush = smb2_flush_file,
1632         .async_readv = smb2_async_readv,
1633         .async_writev = smb2_async_writev,
1634         .sync_read = smb2_sync_read,
1635         .sync_write = smb2_sync_write,
1636         .query_dir_first = smb2_query_dir_first,
1637         .query_dir_next = smb2_query_dir_next,
1638         .close_dir = smb2_close_dir,
1639         .calc_smb_size = smb2_calc_size,
1640         .is_status_pending = smb2_is_status_pending,
1641         .oplock_response = smb2_oplock_response,
1642         .queryfs = smb2_queryfs,
1643         .mand_lock = smb2_mand_lock,
1644         .mand_unlock_range = smb2_unlock_range,
1645         .push_mand_locks = smb2_push_mandatory_locks,
1646         .get_lease_key = smb2_get_lease_key,
1647         .set_lease_key = smb2_set_lease_key,
1648         .new_lease_key = smb2_new_lease_key,
1649         .calc_signature = smb2_calc_signature,
1650         .is_read_op = smb21_is_read_op,
1651         .set_oplock_level = smb21_set_oplock_level,
1652         .create_lease_buf = smb2_create_lease_buf,
1653         .parse_lease_buf = smb2_parse_lease_buf,
1654         .clone_range = smb2_clone_range,
1655         .wp_retry_size = smb2_wp_retry_size,
1656         .dir_needs_close = smb2_dir_needs_close,
1657 };
1658
1659 struct smb_version_operations smb30_operations = {
1660         .compare_fids = smb2_compare_fids,
1661         .setup_request = smb2_setup_request,
1662         .setup_async_request = smb2_setup_async_request,
1663         .check_receive = smb2_check_receive,
1664         .add_credits = smb2_add_credits,
1665         .set_credits = smb2_set_credits,
1666         .get_credits_field = smb2_get_credits_field,
1667         .get_credits = smb2_get_credits,
1668         .wait_mtu_credits = smb2_wait_mtu_credits,
1669         .get_next_mid = smb2_get_next_mid,
1670         .read_data_offset = smb2_read_data_offset,
1671         .read_data_length = smb2_read_data_length,
1672         .map_error = map_smb2_to_linux_error,
1673         .find_mid = smb2_find_mid,
1674         .check_message = smb2_check_message,
1675         .dump_detail = smb2_dump_detail,
1676         .clear_stats = smb2_clear_stats,
1677         .print_stats = smb2_print_stats,
1678         .dump_share_caps = smb2_dump_share_caps,
1679         .is_oplock_break = smb2_is_valid_oplock_break,
1680         .downgrade_oplock = smb2_downgrade_oplock,
1681         .need_neg = smb2_need_neg,
1682         .negotiate = smb2_negotiate,
1683         .negotiate_wsize = smb2_negotiate_wsize,
1684         .negotiate_rsize = smb2_negotiate_rsize,
1685         .sess_setup = SMB2_sess_setup,
1686         .logoff = SMB2_logoff,
1687         .tree_connect = SMB2_tcon,
1688         .tree_disconnect = SMB2_tdis,
1689         .qfs_tcon = smb3_qfs_tcon,
1690         .is_path_accessible = smb2_is_path_accessible,
1691         .can_echo = smb2_can_echo,
1692         .echo = SMB2_echo,
1693         .query_path_info = smb2_query_path_info,
1694         .get_srv_inum = smb2_get_srv_inum,
1695         .query_file_info = smb2_query_file_info,
1696         .set_path_size = smb2_set_path_size,
1697         .set_file_size = smb2_set_file_size,
1698         .set_file_info = smb2_set_file_info,
1699         .set_compression = smb2_set_compression,
1700         .mkdir = smb2_mkdir,
1701         .mkdir_setinfo = smb2_mkdir_setinfo,
1702         .rmdir = smb2_rmdir,
1703         .unlink = smb2_unlink,
1704         .rename = smb2_rename_path,
1705         .create_hardlink = smb2_create_hardlink,
1706         .query_symlink = smb2_query_symlink,
1707         .query_mf_symlink = smb3_query_mf_symlink,
1708         .create_mf_symlink = smb3_create_mf_symlink,
1709         .open = smb2_open_file,
1710         .set_fid = smb2_set_fid,
1711         .close = smb2_close_file,
1712         .flush = smb2_flush_file,
1713         .async_readv = smb2_async_readv,
1714         .async_writev = smb2_async_writev,
1715         .sync_read = smb2_sync_read,
1716         .sync_write = smb2_sync_write,
1717         .query_dir_first = smb2_query_dir_first,
1718         .query_dir_next = smb2_query_dir_next,
1719         .close_dir = smb2_close_dir,
1720         .calc_smb_size = smb2_calc_size,
1721         .is_status_pending = smb2_is_status_pending,
1722         .oplock_response = smb2_oplock_response,
1723         .queryfs = smb2_queryfs,
1724         .mand_lock = smb2_mand_lock,
1725         .mand_unlock_range = smb2_unlock_range,
1726         .push_mand_locks = smb2_push_mandatory_locks,
1727         .get_lease_key = smb2_get_lease_key,
1728         .set_lease_key = smb2_set_lease_key,
1729         .new_lease_key = smb2_new_lease_key,
1730         .generate_signingkey = generate_smb30signingkey,
1731         .calc_signature = smb3_calc_signature,
1732         .set_integrity  = smb3_set_integrity,
1733         .is_read_op = smb21_is_read_op,
1734         .set_oplock_level = smb3_set_oplock_level,
1735         .create_lease_buf = smb3_create_lease_buf,
1736         .parse_lease_buf = smb3_parse_lease_buf,
1737         .clone_range = smb2_clone_range,
1738         .duplicate_extents = smb2_duplicate_extents,
1739         .validate_negotiate = smb3_validate_negotiate,
1740         .wp_retry_size = smb2_wp_retry_size,
1741         .dir_needs_close = smb2_dir_needs_close,
1742         .fallocate = smb3_fallocate,
1743 };
1744
1745 #ifdef CONFIG_CIFS_SMB311
1746 struct smb_version_operations smb311_operations = {
1747         .compare_fids = smb2_compare_fids,
1748         .setup_request = smb2_setup_request,
1749         .setup_async_request = smb2_setup_async_request,
1750         .check_receive = smb2_check_receive,
1751         .add_credits = smb2_add_credits,
1752         .set_credits = smb2_set_credits,
1753         .get_credits_field = smb2_get_credits_field,
1754         .get_credits = smb2_get_credits,
1755         .wait_mtu_credits = smb2_wait_mtu_credits,
1756         .get_next_mid = smb2_get_next_mid,
1757         .read_data_offset = smb2_read_data_offset,
1758         .read_data_length = smb2_read_data_length,
1759         .map_error = map_smb2_to_linux_error,
1760         .find_mid = smb2_find_mid,
1761         .check_message = smb2_check_message,
1762         .dump_detail = smb2_dump_detail,
1763         .clear_stats = smb2_clear_stats,
1764         .print_stats = smb2_print_stats,
1765         .dump_share_caps = smb2_dump_share_caps,
1766         .is_oplock_break = smb2_is_valid_oplock_break,
1767         .downgrade_oplock = smb2_downgrade_oplock,
1768         .need_neg = smb2_need_neg,
1769         .negotiate = smb2_negotiate,
1770         .negotiate_wsize = smb2_negotiate_wsize,
1771         .negotiate_rsize = smb2_negotiate_rsize,
1772         .sess_setup = SMB2_sess_setup,
1773         .logoff = SMB2_logoff,
1774         .tree_connect = SMB2_tcon,
1775         .tree_disconnect = SMB2_tdis,
1776         .qfs_tcon = smb3_qfs_tcon,
1777         .is_path_accessible = smb2_is_path_accessible,
1778         .can_echo = smb2_can_echo,
1779         .echo = SMB2_echo,
1780         .query_path_info = smb2_query_path_info,
1781         .get_srv_inum = smb2_get_srv_inum,
1782         .query_file_info = smb2_query_file_info,
1783         .set_path_size = smb2_set_path_size,
1784         .set_file_size = smb2_set_file_size,
1785         .set_file_info = smb2_set_file_info,
1786         .set_compression = smb2_set_compression,
1787         .mkdir = smb2_mkdir,
1788         .mkdir_setinfo = smb2_mkdir_setinfo,
1789         .rmdir = smb2_rmdir,
1790         .unlink = smb2_unlink,
1791         .rename = smb2_rename_path,
1792         .create_hardlink = smb2_create_hardlink,
1793         .query_symlink = smb2_query_symlink,
1794         .query_mf_symlink = smb3_query_mf_symlink,
1795         .create_mf_symlink = smb3_create_mf_symlink,
1796         .open = smb2_open_file,
1797         .set_fid = smb2_set_fid,
1798         .close = smb2_close_file,
1799         .flush = smb2_flush_file,
1800         .async_readv = smb2_async_readv,
1801         .async_writev = smb2_async_writev,
1802         .sync_read = smb2_sync_read,
1803         .sync_write = smb2_sync_write,
1804         .query_dir_first = smb2_query_dir_first,
1805         .query_dir_next = smb2_query_dir_next,
1806         .close_dir = smb2_close_dir,
1807         .calc_smb_size = smb2_calc_size,
1808         .is_status_pending = smb2_is_status_pending,
1809         .oplock_response = smb2_oplock_response,
1810         .queryfs = smb2_queryfs,
1811         .mand_lock = smb2_mand_lock,
1812         .mand_unlock_range = smb2_unlock_range,
1813         .push_mand_locks = smb2_push_mandatory_locks,
1814         .get_lease_key = smb2_get_lease_key,
1815         .set_lease_key = smb2_set_lease_key,
1816         .new_lease_key = smb2_new_lease_key,
1817         .generate_signingkey = generate_smb311signingkey,
1818         .calc_signature = smb3_calc_signature,
1819         .set_integrity  = smb3_set_integrity,
1820         .is_read_op = smb21_is_read_op,
1821         .set_oplock_level = smb3_set_oplock_level,
1822         .create_lease_buf = smb3_create_lease_buf,
1823         .parse_lease_buf = smb3_parse_lease_buf,
1824         .clone_range = smb2_clone_range,
1825         .duplicate_extents = smb2_duplicate_extents,
1826 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1827         .wp_retry_size = smb2_wp_retry_size,
1828         .dir_needs_close = smb2_dir_needs_close,
1829         .fallocate = smb3_fallocate,
1830 };
1831 #endif /* CIFS_SMB311 */
1832
1833 struct smb_version_values smb20_values = {
1834         .version_string = SMB20_VERSION_STRING,
1835         .protocol_id = SMB20_PROT_ID,
1836         .req_capabilities = 0, /* MBZ */
1837         .large_lock_type = 0,
1838         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1839         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1840         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1841         .header_size = sizeof(struct smb2_hdr),
1842         .max_header_size = MAX_SMB2_HDR_SIZE,
1843         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1844         .lock_cmd = SMB2_LOCK,
1845         .cap_unix = 0,
1846         .cap_nt_find = SMB2_NT_FIND,
1847         .cap_large_files = SMB2_LARGE_FILES,
1848         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1849         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1850         .create_lease_size = sizeof(struct create_lease),
1851 };
1852
1853 struct smb_version_values smb21_values = {
1854         .version_string = SMB21_VERSION_STRING,
1855         .protocol_id = SMB21_PROT_ID,
1856         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1857         .large_lock_type = 0,
1858         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1859         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1860         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1861         .header_size = sizeof(struct smb2_hdr),
1862         .max_header_size = MAX_SMB2_HDR_SIZE,
1863         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1864         .lock_cmd = SMB2_LOCK,
1865         .cap_unix = 0,
1866         .cap_nt_find = SMB2_NT_FIND,
1867         .cap_large_files = SMB2_LARGE_FILES,
1868         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1869         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1870         .create_lease_size = sizeof(struct create_lease),
1871 };
1872
1873 struct smb_version_values smb30_values = {
1874         .version_string = SMB30_VERSION_STRING,
1875         .protocol_id = SMB30_PROT_ID,
1876         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1877         .large_lock_type = 0,
1878         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1879         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1880         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1881         .header_size = sizeof(struct smb2_hdr),
1882         .max_header_size = MAX_SMB2_HDR_SIZE,
1883         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1884         .lock_cmd = SMB2_LOCK,
1885         .cap_unix = 0,
1886         .cap_nt_find = SMB2_NT_FIND,
1887         .cap_large_files = SMB2_LARGE_FILES,
1888         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1889         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1890         .create_lease_size = sizeof(struct create_lease_v2),
1891 };
1892
1893 struct smb_version_values smb302_values = {
1894         .version_string = SMB302_VERSION_STRING,
1895         .protocol_id = SMB302_PROT_ID,
1896         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1897         .large_lock_type = 0,
1898         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1899         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1900         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1901         .header_size = sizeof(struct smb2_hdr),
1902         .max_header_size = MAX_SMB2_HDR_SIZE,
1903         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1904         .lock_cmd = SMB2_LOCK,
1905         .cap_unix = 0,
1906         .cap_nt_find = SMB2_NT_FIND,
1907         .cap_large_files = SMB2_LARGE_FILES,
1908         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1909         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1910         .create_lease_size = sizeof(struct create_lease_v2),
1911 };
1912
1913 #ifdef CONFIG_CIFS_SMB311
1914 struct smb_version_values smb311_values = {
1915         .version_string = SMB311_VERSION_STRING,
1916         .protocol_id = SMB311_PROT_ID,
1917         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1918         .large_lock_type = 0,
1919         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1920         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1921         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1922         .header_size = sizeof(struct smb2_hdr),
1923         .max_header_size = MAX_SMB2_HDR_SIZE,
1924         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1925         .lock_cmd = SMB2_LOCK,
1926         .cap_unix = 0,
1927         .cap_nt_find = SMB2_NT_FIND,
1928         .cap_large_files = SMB2_LARGE_FILES,
1929         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1930         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1931         .create_lease_size = sizeof(struct create_lease_v2),
1932 };
1933 #endif /* SMB311 */