2 * SMB2 version specific operations
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
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.
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.
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
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
24 #include "smb2proto.h"
25 #include "cifsproto.h"
26 #include "cifs_debug.h"
27 #include "cifs_unicode.h"
28 #include "smb2status.h"
32 change_conf(struct TCP_Server_Info *server)
34 server->credits += server->echo_credits + server->oplock_credits;
35 server->oplock_credits = server->echo_credits = 0;
36 switch (server->credits) {
40 server->echoes = false;
41 server->oplocks = false;
42 cifs_dbg(VFS, "disabling echoes and oplocks\n");
45 server->echoes = true;
46 server->oplocks = false;
47 server->echo_credits = 1;
48 cifs_dbg(FYI, "disabling oplocks\n");
51 server->echoes = true;
52 server->oplocks = true;
53 server->echo_credits = 1;
54 server->oplock_credits = 1;
56 server->credits -= server->echo_credits + server->oplock_credits;
61 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
65 spin_lock(&server->req_lock);
66 val = server->ops->get_credits_field(server, optype);
69 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
70 rc = change_conf(server);
72 * Sometimes server returns 0 credits on oplock break ack - we need to
73 * rebalance credits in this case.
75 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
77 if (server->credits > 1) {
79 server->oplock_credits++;
82 spin_unlock(&server->req_lock);
83 wake_up(&server->request_q);
85 cifs_reconnect(server);
89 smb2_set_credits(struct TCP_Server_Info *server, const int val)
91 spin_lock(&server->req_lock);
92 server->credits = val;
93 spin_unlock(&server->req_lock);
97 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
101 return &server->echo_credits;
103 return &server->oplock_credits;
105 return &server->credits;
110 smb2_get_credits(struct mid_q_entry *mid)
112 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
116 smb2_get_next_mid(struct TCP_Server_Info *server)
119 /* for SMB2 we need the current value */
120 spin_lock(&GlobalMid_Lock);
121 mid = server->CurrentMid++;
122 spin_unlock(&GlobalMid_Lock);
126 static struct mid_q_entry *
127 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
129 struct mid_q_entry *mid;
130 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
132 spin_lock(&GlobalMid_Lock);
133 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
134 if ((mid->mid == hdr->MessageId) &&
135 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
136 (mid->command == hdr->Command)) {
137 spin_unlock(&GlobalMid_Lock);
141 spin_unlock(&GlobalMid_Lock);
146 smb2_dump_detail(void *buf)
148 #ifdef CONFIG_CIFS_DEBUG2
149 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
151 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
152 smb->Command, smb->Status, smb->Flags, smb->MessageId,
154 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
159 smb2_need_neg(struct TCP_Server_Info *server)
161 return server->max_read == 0;
165 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
168 ses->server->CurrentMid = 0;
169 rc = SMB2_negotiate(xid, ses);
170 /* BB we probably don't need to retry with modern servers */
177 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
179 struct TCP_Server_Info *server = tcon->ses->server;
182 /* start with specified wsize, or default */
183 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
184 wsize = min_t(unsigned int, wsize, server->max_write);
186 * limit write size to 2 ** 16, because we don't support multicredit
189 wsize = min_t(unsigned int, wsize, 2 << 15);
195 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
197 struct TCP_Server_Info *server = tcon->ses->server;
200 /* start with specified rsize, or default */
201 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
202 rsize = min_t(unsigned int, rsize, server->max_read);
204 * limit write size to 2 ** 16, because we don't support multicredit
207 rsize = min_t(unsigned int, rsize, 2 << 15);
212 #ifdef CONFIG_CIFS_STATS2
214 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
217 unsigned int ret_data_len = 0;
218 struct network_interface_info_ioctl_rsp *out_buf;
220 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
221 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
222 NULL /* no data input */, 0 /* no data input */,
223 (char **)&out_buf, &ret_data_len);
225 if ((rc == 0) && (ret_data_len > 0)) {
226 /* Dump info on first interface */
227 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
228 le32_to_cpu(out_buf->Capability));
229 cifs_dbg(FYI, "Link Speed %lld\n",
230 le64_to_cpu(out_buf->LinkSpeed));
232 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
239 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
242 __le16 srch_path = 0; /* Null - open root of share */
243 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
244 struct cifs_open_parms oparms;
248 oparms.desired_access = FILE_READ_ATTRIBUTES;
249 oparms.disposition = FILE_OPEN;
250 oparms.create_options = 0;
252 oparms.reconnect = false;
254 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
258 #ifdef CONFIG_CIFS_STATS2
259 SMB3_request_interfaces(xid, tcon);
262 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
263 FS_ATTRIBUTE_INFORMATION);
264 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
265 FS_DEVICE_INFORMATION);
266 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
267 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
268 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
273 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
276 __le16 srch_path = 0; /* Null - open root of share */
277 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
278 struct cifs_open_parms oparms;
282 oparms.desired_access = FILE_READ_ATTRIBUTES;
283 oparms.disposition = FILE_OPEN;
284 oparms.create_options = 0;
286 oparms.reconnect = false;
288 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
292 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
293 FS_ATTRIBUTE_INFORMATION);
294 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
295 FS_DEVICE_INFORMATION);
296 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
301 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
302 struct cifs_sb_info *cifs_sb, const char *full_path)
306 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
307 struct cifs_open_parms oparms;
310 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
315 oparms.desired_access = FILE_READ_ATTRIBUTES;
316 oparms.disposition = FILE_OPEN;
317 oparms.create_options = 0;
319 oparms.reconnect = false;
321 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
327 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
333 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
334 struct cifs_sb_info *cifs_sb, const char *full_path,
335 u64 *uniqueid, FILE_ALL_INFO *data)
337 *uniqueid = le64_to_cpu(data->IndexNumber);
342 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
343 struct cifs_fid *fid, FILE_ALL_INFO *data)
346 struct smb2_file_all_info *smb2_data;
348 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
350 if (smb2_data == NULL)
353 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
356 move_smb2_info_to_cifs(data, smb2_data);
362 smb2_can_echo(struct TCP_Server_Info *server)
364 return server->echoes;
368 smb2_clear_stats(struct cifs_tcon *tcon)
370 #ifdef CONFIG_CIFS_STATS
372 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
373 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
374 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
380 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
382 seq_puts(m, "\n\tShare Capabilities:");
383 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
384 seq_puts(m, " DFS,");
385 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
386 seq_puts(m, " CONTINUOUS AVAILABILITY,");
387 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
388 seq_puts(m, " SCALEOUT,");
389 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
390 seq_puts(m, " CLUSTER,");
391 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
392 seq_puts(m, " ASYMMETRIC,");
393 if (tcon->capabilities == 0)
394 seq_puts(m, " None");
395 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
396 seq_puts(m, " Aligned,");
397 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
398 seq_puts(m, " Partition Aligned,");
399 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
400 seq_puts(m, " SSD,");
401 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
402 seq_puts(m, " TRIM-support,");
404 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
405 if (tcon->perf_sector_size)
406 seq_printf(m, "\tOptimal sector size: 0x%x",
407 tcon->perf_sector_size);
411 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
413 #ifdef CONFIG_CIFS_STATS
414 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
415 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
416 seq_printf(m, "\nNegotiates: %d sent %d failed",
417 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
418 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
419 seq_printf(m, "\nSessionSetups: %d sent %d failed",
420 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
421 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
422 seq_printf(m, "\nLogoffs: %d sent %d failed",
423 atomic_read(&sent[SMB2_LOGOFF_HE]),
424 atomic_read(&failed[SMB2_LOGOFF_HE]));
425 seq_printf(m, "\nTreeConnects: %d sent %d failed",
426 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
427 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
428 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
429 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
430 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
431 seq_printf(m, "\nCreates: %d sent %d failed",
432 atomic_read(&sent[SMB2_CREATE_HE]),
433 atomic_read(&failed[SMB2_CREATE_HE]));
434 seq_printf(m, "\nCloses: %d sent %d failed",
435 atomic_read(&sent[SMB2_CLOSE_HE]),
436 atomic_read(&failed[SMB2_CLOSE_HE]));
437 seq_printf(m, "\nFlushes: %d sent %d failed",
438 atomic_read(&sent[SMB2_FLUSH_HE]),
439 atomic_read(&failed[SMB2_FLUSH_HE]));
440 seq_printf(m, "\nReads: %d sent %d failed",
441 atomic_read(&sent[SMB2_READ_HE]),
442 atomic_read(&failed[SMB2_READ_HE]));
443 seq_printf(m, "\nWrites: %d sent %d failed",
444 atomic_read(&sent[SMB2_WRITE_HE]),
445 atomic_read(&failed[SMB2_WRITE_HE]));
446 seq_printf(m, "\nLocks: %d sent %d failed",
447 atomic_read(&sent[SMB2_LOCK_HE]),
448 atomic_read(&failed[SMB2_LOCK_HE]));
449 seq_printf(m, "\nIOCTLs: %d sent %d failed",
450 atomic_read(&sent[SMB2_IOCTL_HE]),
451 atomic_read(&failed[SMB2_IOCTL_HE]));
452 seq_printf(m, "\nCancels: %d sent %d failed",
453 atomic_read(&sent[SMB2_CANCEL_HE]),
454 atomic_read(&failed[SMB2_CANCEL_HE]));
455 seq_printf(m, "\nEchos: %d sent %d failed",
456 atomic_read(&sent[SMB2_ECHO_HE]),
457 atomic_read(&failed[SMB2_ECHO_HE]));
458 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
459 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
460 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
461 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
462 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
463 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
464 seq_printf(m, "\nQueryInfos: %d sent %d failed",
465 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
466 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
467 seq_printf(m, "\nSetInfos: %d sent %d failed",
468 atomic_read(&sent[SMB2_SET_INFO_HE]),
469 atomic_read(&failed[SMB2_SET_INFO_HE]));
470 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
471 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
472 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
477 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
479 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
480 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
482 cfile->fid.persistent_fid = fid->persistent_fid;
483 cfile->fid.volatile_fid = fid->volatile_fid;
484 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
486 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
490 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
491 struct cifs_fid *fid)
493 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
497 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
498 struct cifs_fid *fid)
500 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
504 smb2_read_data_offset(char *buf)
506 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
507 return rsp->DataOffset;
511 smb2_read_data_length(char *buf)
513 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
514 return le32_to_cpu(rsp->DataLength);
519 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
520 struct cifs_io_parms *parms, unsigned int *bytes_read,
521 char **buf, int *buf_type)
523 parms->persistent_fid = cfile->fid.persistent_fid;
524 parms->volatile_fid = cfile->fid.volatile_fid;
525 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
529 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
530 struct cifs_io_parms *parms, unsigned int *written,
531 struct kvec *iov, unsigned long nr_segs)
534 parms->persistent_fid = cfile->fid.persistent_fid;
535 parms->volatile_fid = cfile->fid.volatile_fid;
536 return SMB2_write(xid, parms, written, iov, nr_segs);
540 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
541 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
543 __le64 eof = cpu_to_le64(size);
544 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
545 cfile->fid.volatile_fid, cfile->pid, &eof);
549 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
550 struct cifsFileInfo *cfile)
552 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
553 cfile->fid.volatile_fid);
557 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
558 const char *path, struct cifs_sb_info *cifs_sb,
559 struct cifs_fid *fid, __u16 search_flags,
560 struct cifs_search_info *srch_inf)
564 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
565 struct cifs_open_parms oparms;
567 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
572 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
573 oparms.disposition = FILE_OPEN;
574 oparms.create_options = 0;
576 oparms.reconnect = false;
578 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
581 cifs_dbg(VFS, "open dir failed\n");
585 srch_inf->entries_in_buffer = 0;
586 srch_inf->index_of_last_entry = 0;
588 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
589 fid->volatile_fid, 0, srch_inf);
591 cifs_dbg(VFS, "query directory failed\n");
592 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
598 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
599 struct cifs_fid *fid, __u16 search_flags,
600 struct cifs_search_info *srch_inf)
602 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
603 fid->volatile_fid, 0, srch_inf);
607 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
608 struct cifs_fid *fid)
610 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
614 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
615 * the number of credits and return true. Otherwise - return false.
618 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
620 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
622 if (hdr->Status != STATUS_PENDING)
626 spin_lock(&server->req_lock);
627 server->credits += le16_to_cpu(hdr->CreditRequest);
628 spin_unlock(&server->req_lock);
629 wake_up(&server->request_q);
636 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
637 struct cifsInodeInfo *cinode)
639 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
640 return SMB2_lease_break(0, tcon, cinode->lease_key,
641 smb2_get_lease_state(cinode));
643 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
645 CIFS_CACHE_READ(cinode) ? 1 : 0);
649 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
653 __le16 srch_path = 0; /* Null - open root of share */
654 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
655 struct cifs_open_parms oparms;
659 oparms.desired_access = FILE_READ_ATTRIBUTES;
660 oparms.disposition = FILE_OPEN;
661 oparms.create_options = 0;
663 oparms.reconnect = false;
665 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
668 buf->f_type = SMB2_MAGIC_NUMBER;
669 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
671 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
676 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
678 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
679 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
683 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
684 __u64 length, __u32 type, int lock, int unlock, bool wait)
687 type = SMB2_LOCKFLAG_UNLOCK;
688 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
689 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
690 current->tgid, length, offset, type, wait);
694 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
696 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
700 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
702 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
706 smb2_new_lease_key(struct cifs_fid *fid)
708 get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
712 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
713 const char *full_path, char **target_path,
714 struct cifs_sb_info *cifs_sb)
718 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
719 struct cifs_open_parms oparms;
721 struct smb2_err_rsp *err_buf = NULL;
722 struct smb2_symlink_err_rsp *symlink;
723 unsigned int sub_len, sub_offset;
725 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
727 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
732 oparms.desired_access = FILE_READ_ATTRIBUTES;
733 oparms.disposition = FILE_OPEN;
734 oparms.create_options = 0;
736 oparms.reconnect = false;
738 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
740 if (!rc || !err_buf) {
744 /* open must fail on symlink - reset rc */
746 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
747 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
748 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
749 *target_path = cifs_strndup_from_utf16(
750 (char *)symlink->PathBuffer + sub_offset,
751 sub_len, true, cifs_sb->local_nls);
752 if (!(*target_path)) {
756 convert_delimiter(*target_path, '/');
757 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
763 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
764 unsigned int epoch, bool *purge_cache)
767 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
769 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
770 cinode->oplock = CIFS_CACHE_RHW_FLG;
771 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
773 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
774 cinode->oplock = CIFS_CACHE_RW_FLG;
775 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
777 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
778 cinode->oplock = CIFS_CACHE_READ_FLG;
779 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
786 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
787 unsigned int epoch, bool *purge_cache)
789 char message[5] = {0};
792 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
796 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
797 cinode->oplock |= CIFS_CACHE_READ_FLG;
798 strcat(message, "R");
800 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
801 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
802 strcat(message, "H");
804 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
805 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
806 strcat(message, "W");
809 strcat(message, "None");
810 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
815 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
816 unsigned int epoch, bool *purge_cache)
818 unsigned int old_oplock = cinode->oplock;
820 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
823 *purge_cache = false;
824 if (old_oplock == CIFS_CACHE_READ_FLG) {
825 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
826 (epoch - cinode->epoch > 0))
828 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
829 (epoch - cinode->epoch > 1))
831 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
832 (epoch - cinode->epoch > 1))
834 else if (cinode->oplock == 0 &&
835 (epoch - cinode->epoch > 0))
837 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
838 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
839 (epoch - cinode->epoch > 0))
841 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
842 (epoch - cinode->epoch > 1))
845 cinode->epoch = epoch;
850 smb2_is_read_op(__u32 oplock)
852 return oplock == SMB2_OPLOCK_LEVEL_II;
856 smb21_is_read_op(__u32 oplock)
858 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
859 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
863 map_oplock_to_lease(u8 oplock)
865 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
866 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
867 else if (oplock == SMB2_OPLOCK_LEVEL_II)
868 return SMB2_LEASE_READ_CACHING;
869 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
870 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
871 SMB2_LEASE_WRITE_CACHING;
876 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
878 struct create_lease *buf;
880 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
884 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
885 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
886 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
888 buf->ccontext.DataOffset = cpu_to_le16(offsetof
889 (struct create_lease, lcontext));
890 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
891 buf->ccontext.NameOffset = cpu_to_le16(offsetof
892 (struct create_lease, Name));
893 buf->ccontext.NameLength = cpu_to_le16(4);
902 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
904 struct create_lease_v2 *buf;
906 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
910 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
911 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
912 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
914 buf->ccontext.DataOffset = cpu_to_le16(offsetof
915 (struct create_lease_v2, lcontext));
916 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
917 buf->ccontext.NameOffset = cpu_to_le16(offsetof
918 (struct create_lease_v2, Name));
919 buf->ccontext.NameLength = cpu_to_le16(4);
928 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
930 struct create_lease *lc = (struct create_lease *)buf;
932 *epoch = 0; /* not used */
933 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
934 return SMB2_OPLOCK_LEVEL_NOCHANGE;
935 return le32_to_cpu(lc->lcontext.LeaseState);
939 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
941 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
943 *epoch = le16_to_cpu(lc->lcontext.Epoch);
944 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
945 return SMB2_OPLOCK_LEVEL_NOCHANGE;
946 return le32_to_cpu(lc->lcontext.LeaseState);
949 struct smb_version_operations smb20_operations = {
950 .compare_fids = smb2_compare_fids,
951 .setup_request = smb2_setup_request,
952 .setup_async_request = smb2_setup_async_request,
953 .check_receive = smb2_check_receive,
954 .add_credits = smb2_add_credits,
955 .set_credits = smb2_set_credits,
956 .get_credits_field = smb2_get_credits_field,
957 .get_credits = smb2_get_credits,
958 .get_next_mid = smb2_get_next_mid,
959 .read_data_offset = smb2_read_data_offset,
960 .read_data_length = smb2_read_data_length,
961 .map_error = map_smb2_to_linux_error,
962 .find_mid = smb2_find_mid,
963 .check_message = smb2_check_message,
964 .dump_detail = smb2_dump_detail,
965 .clear_stats = smb2_clear_stats,
966 .print_stats = smb2_print_stats,
967 .is_oplock_break = smb2_is_valid_oplock_break,
968 .need_neg = smb2_need_neg,
969 .negotiate = smb2_negotiate,
970 .negotiate_wsize = smb2_negotiate_wsize,
971 .negotiate_rsize = smb2_negotiate_rsize,
972 .sess_setup = SMB2_sess_setup,
973 .logoff = SMB2_logoff,
974 .tree_connect = SMB2_tcon,
975 .tree_disconnect = SMB2_tdis,
976 .qfs_tcon = smb2_qfs_tcon,
977 .is_path_accessible = smb2_is_path_accessible,
978 .can_echo = smb2_can_echo,
980 .query_path_info = smb2_query_path_info,
981 .get_srv_inum = smb2_get_srv_inum,
982 .query_file_info = smb2_query_file_info,
983 .set_path_size = smb2_set_path_size,
984 .set_file_size = smb2_set_file_size,
985 .set_file_info = smb2_set_file_info,
986 .set_compression = smb2_set_compression,
988 .mkdir_setinfo = smb2_mkdir_setinfo,
990 .unlink = smb2_unlink,
991 .rename = smb2_rename_path,
992 .create_hardlink = smb2_create_hardlink,
993 .query_symlink = smb2_query_symlink,
994 .open = smb2_open_file,
995 .set_fid = smb2_set_fid,
996 .close = smb2_close_file,
997 .flush = smb2_flush_file,
998 .async_readv = smb2_async_readv,
999 .async_writev = smb2_async_writev,
1000 .sync_read = smb2_sync_read,
1001 .sync_write = smb2_sync_write,
1002 .query_dir_first = smb2_query_dir_first,
1003 .query_dir_next = smb2_query_dir_next,
1004 .close_dir = smb2_close_dir,
1005 .calc_smb_size = smb2_calc_size,
1006 .is_status_pending = smb2_is_status_pending,
1007 .oplock_response = smb2_oplock_response,
1008 .queryfs = smb2_queryfs,
1009 .mand_lock = smb2_mand_lock,
1010 .mand_unlock_range = smb2_unlock_range,
1011 .push_mand_locks = smb2_push_mandatory_locks,
1012 .get_lease_key = smb2_get_lease_key,
1013 .set_lease_key = smb2_set_lease_key,
1014 .new_lease_key = smb2_new_lease_key,
1015 .calc_signature = smb2_calc_signature,
1016 .is_read_op = smb2_is_read_op,
1017 .set_oplock_level = smb2_set_oplock_level,
1018 .create_lease_buf = smb2_create_lease_buf,
1019 .parse_lease_buf = smb2_parse_lease_buf,
1022 struct smb_version_operations smb21_operations = {
1023 .compare_fids = smb2_compare_fids,
1024 .setup_request = smb2_setup_request,
1025 .setup_async_request = smb2_setup_async_request,
1026 .check_receive = smb2_check_receive,
1027 .add_credits = smb2_add_credits,
1028 .set_credits = smb2_set_credits,
1029 .get_credits_field = smb2_get_credits_field,
1030 .get_credits = smb2_get_credits,
1031 .get_next_mid = smb2_get_next_mid,
1032 .read_data_offset = smb2_read_data_offset,
1033 .read_data_length = smb2_read_data_length,
1034 .map_error = map_smb2_to_linux_error,
1035 .find_mid = smb2_find_mid,
1036 .check_message = smb2_check_message,
1037 .dump_detail = smb2_dump_detail,
1038 .clear_stats = smb2_clear_stats,
1039 .print_stats = smb2_print_stats,
1040 .is_oplock_break = smb2_is_valid_oplock_break,
1041 .need_neg = smb2_need_neg,
1042 .negotiate = smb2_negotiate,
1043 .negotiate_wsize = smb2_negotiate_wsize,
1044 .negotiate_rsize = smb2_negotiate_rsize,
1045 .sess_setup = SMB2_sess_setup,
1046 .logoff = SMB2_logoff,
1047 .tree_connect = SMB2_tcon,
1048 .tree_disconnect = SMB2_tdis,
1049 .qfs_tcon = smb2_qfs_tcon,
1050 .is_path_accessible = smb2_is_path_accessible,
1051 .can_echo = smb2_can_echo,
1053 .query_path_info = smb2_query_path_info,
1054 .get_srv_inum = smb2_get_srv_inum,
1055 .query_file_info = smb2_query_file_info,
1056 .set_path_size = smb2_set_path_size,
1057 .set_file_size = smb2_set_file_size,
1058 .set_file_info = smb2_set_file_info,
1059 .set_compression = smb2_set_compression,
1060 .mkdir = smb2_mkdir,
1061 .mkdir_setinfo = smb2_mkdir_setinfo,
1062 .rmdir = smb2_rmdir,
1063 .unlink = smb2_unlink,
1064 .rename = smb2_rename_path,
1065 .create_hardlink = smb2_create_hardlink,
1066 .query_symlink = smb2_query_symlink,
1067 .open = smb2_open_file,
1068 .set_fid = smb2_set_fid,
1069 .close = smb2_close_file,
1070 .flush = smb2_flush_file,
1071 .async_readv = smb2_async_readv,
1072 .async_writev = smb2_async_writev,
1073 .sync_read = smb2_sync_read,
1074 .sync_write = smb2_sync_write,
1075 .query_dir_first = smb2_query_dir_first,
1076 .query_dir_next = smb2_query_dir_next,
1077 .close_dir = smb2_close_dir,
1078 .calc_smb_size = smb2_calc_size,
1079 .is_status_pending = smb2_is_status_pending,
1080 .oplock_response = smb2_oplock_response,
1081 .queryfs = smb2_queryfs,
1082 .mand_lock = smb2_mand_lock,
1083 .mand_unlock_range = smb2_unlock_range,
1084 .push_mand_locks = smb2_push_mandatory_locks,
1085 .get_lease_key = smb2_get_lease_key,
1086 .set_lease_key = smb2_set_lease_key,
1087 .new_lease_key = smb2_new_lease_key,
1088 .calc_signature = smb2_calc_signature,
1089 .is_read_op = smb21_is_read_op,
1090 .set_oplock_level = smb21_set_oplock_level,
1091 .create_lease_buf = smb2_create_lease_buf,
1092 .parse_lease_buf = smb2_parse_lease_buf,
1095 struct smb_version_operations smb30_operations = {
1096 .compare_fids = smb2_compare_fids,
1097 .setup_request = smb2_setup_request,
1098 .setup_async_request = smb2_setup_async_request,
1099 .check_receive = smb2_check_receive,
1100 .add_credits = smb2_add_credits,
1101 .set_credits = smb2_set_credits,
1102 .get_credits_field = smb2_get_credits_field,
1103 .get_credits = smb2_get_credits,
1104 .get_next_mid = smb2_get_next_mid,
1105 .read_data_offset = smb2_read_data_offset,
1106 .read_data_length = smb2_read_data_length,
1107 .map_error = map_smb2_to_linux_error,
1108 .find_mid = smb2_find_mid,
1109 .check_message = smb2_check_message,
1110 .dump_detail = smb2_dump_detail,
1111 .clear_stats = smb2_clear_stats,
1112 .print_stats = smb2_print_stats,
1113 .dump_share_caps = smb2_dump_share_caps,
1114 .is_oplock_break = smb2_is_valid_oplock_break,
1115 .need_neg = smb2_need_neg,
1116 .negotiate = smb2_negotiate,
1117 .negotiate_wsize = smb2_negotiate_wsize,
1118 .negotiate_rsize = smb2_negotiate_rsize,
1119 .sess_setup = SMB2_sess_setup,
1120 .logoff = SMB2_logoff,
1121 .tree_connect = SMB2_tcon,
1122 .tree_disconnect = SMB2_tdis,
1123 .qfs_tcon = smb3_qfs_tcon,
1124 .is_path_accessible = smb2_is_path_accessible,
1125 .can_echo = smb2_can_echo,
1127 .query_path_info = smb2_query_path_info,
1128 .get_srv_inum = smb2_get_srv_inum,
1129 .query_file_info = smb2_query_file_info,
1130 .set_path_size = smb2_set_path_size,
1131 .set_file_size = smb2_set_file_size,
1132 .set_file_info = smb2_set_file_info,
1133 .set_compression = smb2_set_compression,
1134 .mkdir = smb2_mkdir,
1135 .mkdir_setinfo = smb2_mkdir_setinfo,
1136 .rmdir = smb2_rmdir,
1137 .unlink = smb2_unlink,
1138 .rename = smb2_rename_path,
1139 .create_hardlink = smb2_create_hardlink,
1140 .query_symlink = smb2_query_symlink,
1141 .open = smb2_open_file,
1142 .set_fid = smb2_set_fid,
1143 .close = smb2_close_file,
1144 .flush = smb2_flush_file,
1145 .async_readv = smb2_async_readv,
1146 .async_writev = smb2_async_writev,
1147 .sync_read = smb2_sync_read,
1148 .sync_write = smb2_sync_write,
1149 .query_dir_first = smb2_query_dir_first,
1150 .query_dir_next = smb2_query_dir_next,
1151 .close_dir = smb2_close_dir,
1152 .calc_smb_size = smb2_calc_size,
1153 .is_status_pending = smb2_is_status_pending,
1154 .oplock_response = smb2_oplock_response,
1155 .queryfs = smb2_queryfs,
1156 .mand_lock = smb2_mand_lock,
1157 .mand_unlock_range = smb2_unlock_range,
1158 .push_mand_locks = smb2_push_mandatory_locks,
1159 .get_lease_key = smb2_get_lease_key,
1160 .set_lease_key = smb2_set_lease_key,
1161 .new_lease_key = smb2_new_lease_key,
1162 .generate_signingkey = generate_smb3signingkey,
1163 .calc_signature = smb3_calc_signature,
1164 .is_read_op = smb21_is_read_op,
1165 .set_oplock_level = smb3_set_oplock_level,
1166 .create_lease_buf = smb3_create_lease_buf,
1167 .parse_lease_buf = smb3_parse_lease_buf,
1170 struct smb_version_values smb20_values = {
1171 .version_string = SMB20_VERSION_STRING,
1172 .protocol_id = SMB20_PROT_ID,
1173 .req_capabilities = 0, /* MBZ */
1174 .large_lock_type = 0,
1175 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1176 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1177 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1178 .header_size = sizeof(struct smb2_hdr),
1179 .max_header_size = MAX_SMB2_HDR_SIZE,
1180 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1181 .lock_cmd = SMB2_LOCK,
1183 .cap_nt_find = SMB2_NT_FIND,
1184 .cap_large_files = SMB2_LARGE_FILES,
1185 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1186 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1187 .create_lease_size = sizeof(struct create_lease),
1190 struct smb_version_values smb21_values = {
1191 .version_string = SMB21_VERSION_STRING,
1192 .protocol_id = SMB21_PROT_ID,
1193 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1194 .large_lock_type = 0,
1195 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1196 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1197 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1198 .header_size = sizeof(struct smb2_hdr),
1199 .max_header_size = MAX_SMB2_HDR_SIZE,
1200 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1201 .lock_cmd = SMB2_LOCK,
1203 .cap_nt_find = SMB2_NT_FIND,
1204 .cap_large_files = SMB2_LARGE_FILES,
1205 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1206 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1207 .create_lease_size = sizeof(struct create_lease),
1210 struct smb_version_values smb30_values = {
1211 .version_string = SMB30_VERSION_STRING,
1212 .protocol_id = SMB30_PROT_ID,
1213 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1214 .large_lock_type = 0,
1215 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1216 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1217 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1218 .header_size = sizeof(struct smb2_hdr),
1219 .max_header_size = MAX_SMB2_HDR_SIZE,
1220 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1221 .lock_cmd = SMB2_LOCK,
1223 .cap_nt_find = SMB2_NT_FIND,
1224 .cap_large_files = SMB2_LARGE_FILES,
1225 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1226 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1227 .create_lease_size = sizeof(struct create_lease_v2),
1230 struct smb_version_values smb302_values = {
1231 .version_string = SMB302_VERSION_STRING,
1232 .protocol_id = SMB302_PROT_ID,
1233 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1234 .large_lock_type = 0,
1235 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1236 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1237 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1238 .header_size = sizeof(struct smb2_hdr),
1239 .max_header_size = MAX_SMB2_HDR_SIZE,
1240 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1241 .lock_cmd = SMB2_LOCK,
1243 .cap_nt_find = SMB2_NT_FIND,
1244 .cap_large_files = SMB2_LARGE_FILES,
1245 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1246 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1247 .create_lease_size = sizeof(struct create_lease_v2),