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);
213 smb2_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
214 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
218 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
219 struct cifs_open_parms oparms
;
222 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
227 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
228 oparms
.disposition
= FILE_OPEN
;
229 oparms
.create_options
= 0;
231 oparms
.reconnect
= false;
233 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
);
239 rc
= SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
245 smb2_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
246 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
247 u64
*uniqueid
, FILE_ALL_INFO
*data
)
249 *uniqueid
= le64_to_cpu(data
->IndexNumber
);
254 smb2_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
255 struct cifs_fid
*fid
, FILE_ALL_INFO
*data
)
258 struct smb2_file_all_info
*smb2_data
;
260 smb2_data
= kzalloc(sizeof(struct smb2_file_all_info
) + MAX_NAME
* 2,
262 if (smb2_data
== NULL
)
265 rc
= SMB2_query_info(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
,
268 move_smb2_info_to_cifs(data
, smb2_data
);
274 smb2_can_echo(struct TCP_Server_Info
*server
)
276 return server
->echoes
;
280 smb2_clear_stats(struct cifs_tcon
*tcon
)
282 #ifdef CONFIG_CIFS_STATS
284 for (i
= 0; i
< NUMBER_OF_SMB2_COMMANDS
; i
++) {
285 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_sent
[i
], 0);
286 atomic_set(&tcon
->stats
.smb2_stats
.smb2_com_failed
[i
], 0);
292 smb2_dump_share_caps(struct seq_file
*m
, struct cifs_tcon
*tcon
)
294 seq_puts(m
, "\n\tShare Capabilities:");
295 if (tcon
->capabilities
& SMB2_SHARE_CAP_DFS
)
296 seq_puts(m
, " DFS,");
297 if (tcon
->capabilities
& SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY
)
298 seq_puts(m
, " CONTINUOUS AVAILABILITY,");
299 if (tcon
->capabilities
& SMB2_SHARE_CAP_SCALEOUT
)
300 seq_puts(m
, " SCALEOUT,");
301 if (tcon
->capabilities
& SMB2_SHARE_CAP_CLUSTER
)
302 seq_puts(m
, " CLUSTER,");
303 if (tcon
->capabilities
& SMB2_SHARE_CAP_ASYMMETRIC
)
304 seq_puts(m
, " ASYMMETRIC,");
305 if (tcon
->capabilities
== 0)
306 seq_puts(m
, " None");
307 seq_printf(m
, "\tShare Flags: 0x%x", tcon
->share_flags
);
311 smb2_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
313 #ifdef CONFIG_CIFS_STATS
314 atomic_t
*sent
= tcon
->stats
.smb2_stats
.smb2_com_sent
;
315 atomic_t
*failed
= tcon
->stats
.smb2_stats
.smb2_com_failed
;
316 seq_printf(m
, "\nNegotiates: %d sent %d failed",
317 atomic_read(&sent
[SMB2_NEGOTIATE_HE
]),
318 atomic_read(&failed
[SMB2_NEGOTIATE_HE
]));
319 seq_printf(m
, "\nSessionSetups: %d sent %d failed",
320 atomic_read(&sent
[SMB2_SESSION_SETUP_HE
]),
321 atomic_read(&failed
[SMB2_SESSION_SETUP_HE
]));
322 seq_printf(m
, "\nLogoffs: %d sent %d failed",
323 atomic_read(&sent
[SMB2_LOGOFF_HE
]),
324 atomic_read(&failed
[SMB2_LOGOFF_HE
]));
325 seq_printf(m
, "\nTreeConnects: %d sent %d failed",
326 atomic_read(&sent
[SMB2_TREE_CONNECT_HE
]),
327 atomic_read(&failed
[SMB2_TREE_CONNECT_HE
]));
328 seq_printf(m
, "\nTreeDisconnects: %d sent %d failed",
329 atomic_read(&sent
[SMB2_TREE_DISCONNECT_HE
]),
330 atomic_read(&failed
[SMB2_TREE_DISCONNECT_HE
]));
331 seq_printf(m
, "\nCreates: %d sent %d failed",
332 atomic_read(&sent
[SMB2_CREATE_HE
]),
333 atomic_read(&failed
[SMB2_CREATE_HE
]));
334 seq_printf(m
, "\nCloses: %d sent %d failed",
335 atomic_read(&sent
[SMB2_CLOSE_HE
]),
336 atomic_read(&failed
[SMB2_CLOSE_HE
]));
337 seq_printf(m
, "\nFlushes: %d sent %d failed",
338 atomic_read(&sent
[SMB2_FLUSH_HE
]),
339 atomic_read(&failed
[SMB2_FLUSH_HE
]));
340 seq_printf(m
, "\nReads: %d sent %d failed",
341 atomic_read(&sent
[SMB2_READ_HE
]),
342 atomic_read(&failed
[SMB2_READ_HE
]));
343 seq_printf(m
, "\nWrites: %d sent %d failed",
344 atomic_read(&sent
[SMB2_WRITE_HE
]),
345 atomic_read(&failed
[SMB2_WRITE_HE
]));
346 seq_printf(m
, "\nLocks: %d sent %d failed",
347 atomic_read(&sent
[SMB2_LOCK_HE
]),
348 atomic_read(&failed
[SMB2_LOCK_HE
]));
349 seq_printf(m
, "\nIOCTLs: %d sent %d failed",
350 atomic_read(&sent
[SMB2_IOCTL_HE
]),
351 atomic_read(&failed
[SMB2_IOCTL_HE
]));
352 seq_printf(m
, "\nCancels: %d sent %d failed",
353 atomic_read(&sent
[SMB2_CANCEL_HE
]),
354 atomic_read(&failed
[SMB2_CANCEL_HE
]));
355 seq_printf(m
, "\nEchos: %d sent %d failed",
356 atomic_read(&sent
[SMB2_ECHO_HE
]),
357 atomic_read(&failed
[SMB2_ECHO_HE
]));
358 seq_printf(m
, "\nQueryDirectories: %d sent %d failed",
359 atomic_read(&sent
[SMB2_QUERY_DIRECTORY_HE
]),
360 atomic_read(&failed
[SMB2_QUERY_DIRECTORY_HE
]));
361 seq_printf(m
, "\nChangeNotifies: %d sent %d failed",
362 atomic_read(&sent
[SMB2_CHANGE_NOTIFY_HE
]),
363 atomic_read(&failed
[SMB2_CHANGE_NOTIFY_HE
]));
364 seq_printf(m
, "\nQueryInfos: %d sent %d failed",
365 atomic_read(&sent
[SMB2_QUERY_INFO_HE
]),
366 atomic_read(&failed
[SMB2_QUERY_INFO_HE
]));
367 seq_printf(m
, "\nSetInfos: %d sent %d failed",
368 atomic_read(&sent
[SMB2_SET_INFO_HE
]),
369 atomic_read(&failed
[SMB2_SET_INFO_HE
]));
370 seq_printf(m
, "\nOplockBreaks: %d sent %d failed",
371 atomic_read(&sent
[SMB2_OPLOCK_BREAK_HE
]),
372 atomic_read(&failed
[SMB2_OPLOCK_BREAK_HE
]));
377 smb2_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
379 struct cifsInodeInfo
*cinode
= CIFS_I(cfile
->dentry
->d_inode
);
380 struct TCP_Server_Info
*server
= tlink_tcon(cfile
->tlink
)->ses
->server
;
382 cfile
->fid
.persistent_fid
= fid
->persistent_fid
;
383 cfile
->fid
.volatile_fid
= fid
->volatile_fid
;
384 server
->ops
->set_oplock_level(cinode
, oplock
, fid
->epoch
,
386 cinode
->can_cache_brlcks
= CIFS_CACHE_WRITE(cinode
);
390 smb2_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
391 struct cifs_fid
*fid
)
393 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
397 smb2_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
398 struct cifs_fid
*fid
)
400 return SMB2_flush(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
404 smb2_read_data_offset(char *buf
)
406 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
407 return rsp
->DataOffset
;
411 smb2_read_data_length(char *buf
)
413 struct smb2_read_rsp
*rsp
= (struct smb2_read_rsp
*)buf
;
414 return le32_to_cpu(rsp
->DataLength
);
419 smb2_sync_read(const unsigned int xid
, struct cifsFileInfo
*cfile
,
420 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
421 char **buf
, int *buf_type
)
423 parms
->persistent_fid
= cfile
->fid
.persistent_fid
;
424 parms
->volatile_fid
= cfile
->fid
.volatile_fid
;
425 return SMB2_read(xid
, parms
, bytes_read
, buf
, buf_type
);
429 smb2_sync_write(const unsigned int xid
, struct cifsFileInfo
*cfile
,
430 struct cifs_io_parms
*parms
, unsigned int *written
,
431 struct kvec
*iov
, unsigned long nr_segs
)
434 parms
->persistent_fid
= cfile
->fid
.persistent_fid
;
435 parms
->volatile_fid
= cfile
->fid
.volatile_fid
;
436 return SMB2_write(xid
, parms
, written
, iov
, nr_segs
);
440 smb2_set_file_size(const unsigned int xid
, struct cifs_tcon
*tcon
,
441 struct cifsFileInfo
*cfile
, __u64 size
, bool set_alloc
)
443 __le64 eof
= cpu_to_le64(size
);
444 return SMB2_set_eof(xid
, tcon
, cfile
->fid
.persistent_fid
,
445 cfile
->fid
.volatile_fid
, cfile
->pid
, &eof
);
449 smb2_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
450 const char *path
, struct cifs_sb_info
*cifs_sb
,
451 struct cifs_fid
*fid
, __u16 search_flags
,
452 struct cifs_search_info
*srch_inf
)
456 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
457 struct cifs_open_parms oparms
;
459 utf16_path
= cifs_convert_path_to_utf16(path
, cifs_sb
);
464 oparms
.desired_access
= FILE_READ_ATTRIBUTES
| FILE_READ_DATA
;
465 oparms
.disposition
= FILE_OPEN
;
466 oparms
.create_options
= 0;
468 oparms
.reconnect
= false;
470 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, NULL
);
473 cifs_dbg(VFS
, "open dir failed\n");
477 srch_inf
->entries_in_buffer
= 0;
478 srch_inf
->index_of_last_entry
= 0;
480 rc
= SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
481 fid
->volatile_fid
, 0, srch_inf
);
483 cifs_dbg(VFS
, "query directory failed\n");
484 SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
490 smb2_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
491 struct cifs_fid
*fid
, __u16 search_flags
,
492 struct cifs_search_info
*srch_inf
)
494 return SMB2_query_directory(xid
, tcon
, fid
->persistent_fid
,
495 fid
->volatile_fid
, 0, srch_inf
);
499 smb2_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
500 struct cifs_fid
*fid
)
502 return SMB2_close(xid
, tcon
, fid
->persistent_fid
, fid
->volatile_fid
);
506 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
507 * the number of credits and return true. Otherwise - return false.
510 smb2_is_status_pending(char *buf
, struct TCP_Server_Info
*server
, int length
)
512 struct smb2_hdr
*hdr
= (struct smb2_hdr
*)buf
;
514 if (hdr
->Status
!= STATUS_PENDING
)
518 spin_lock(&server
->req_lock
);
519 server
->credits
+= le16_to_cpu(hdr
->CreditRequest
);
520 spin_unlock(&server
->req_lock
);
521 wake_up(&server
->request_q
);
528 smb2_oplock_response(struct cifs_tcon
*tcon
, struct cifs_fid
*fid
,
529 struct cifsInodeInfo
*cinode
)
531 if (tcon
->ses
->server
->capabilities
& SMB2_GLOBAL_CAP_LEASING
)
532 return SMB2_lease_break(0, tcon
, cinode
->lease_key
,
533 smb2_get_lease_state(cinode
));
535 return SMB2_oplock_break(0, tcon
, fid
->persistent_fid
,
537 CIFS_CACHE_READ(cinode
) ? 1 : 0);
541 smb2_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
545 __le16 srch_path
= 0; /* Null - open root of share */
546 u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
547 struct cifs_open_parms oparms
;
551 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
552 oparms
.disposition
= FILE_OPEN
;
553 oparms
.create_options
= 0;
555 oparms
.reconnect
= false;
557 rc
= SMB2_open(xid
, &oparms
, &srch_path
, &oplock
, NULL
, NULL
);
560 buf
->f_type
= SMB2_MAGIC_NUMBER
;
561 rc
= SMB2_QFS_info(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
,
563 SMB2_close(xid
, tcon
, fid
.persistent_fid
, fid
.volatile_fid
);
568 smb2_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
570 return ob1
->fid
.persistent_fid
== ob2
->fid
.persistent_fid
&&
571 ob1
->fid
.volatile_fid
== ob2
->fid
.volatile_fid
;
575 smb2_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
576 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
579 type
= SMB2_LOCKFLAG_UNLOCK
;
580 return SMB2_lock(xid
, tlink_tcon(cfile
->tlink
),
581 cfile
->fid
.persistent_fid
, cfile
->fid
.volatile_fid
,
582 current
->tgid
, length
, offset
, type
, wait
);
586 smb2_get_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
588 memcpy(fid
->lease_key
, CIFS_I(inode
)->lease_key
, SMB2_LEASE_KEY_SIZE
);
592 smb2_set_lease_key(struct inode
*inode
, struct cifs_fid
*fid
)
594 memcpy(CIFS_I(inode
)->lease_key
, fid
->lease_key
, SMB2_LEASE_KEY_SIZE
);
598 smb2_new_lease_key(struct cifs_fid
*fid
)
600 get_random_bytes(fid
->lease_key
, SMB2_LEASE_KEY_SIZE
);
604 smb2_query_symlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
605 const char *full_path
, char **target_path
,
606 struct cifs_sb_info
*cifs_sb
)
610 __u8 oplock
= SMB2_OPLOCK_LEVEL_NONE
;
611 struct cifs_open_parms oparms
;
613 struct smb2_err_rsp
*err_buf
= NULL
;
614 struct smb2_symlink_err_rsp
*symlink
;
615 unsigned int sub_len
, sub_offset
;
617 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
619 utf16_path
= cifs_convert_path_to_utf16(full_path
, cifs_sb
);
624 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
625 oparms
.disposition
= FILE_OPEN
;
626 oparms
.create_options
= 0;
628 oparms
.reconnect
= false;
630 rc
= SMB2_open(xid
, &oparms
, utf16_path
, &oplock
, NULL
, &err_buf
);
632 if (!rc
|| !err_buf
) {
636 /* open must fail on symlink - reset rc */
638 symlink
= (struct smb2_symlink_err_rsp
*)err_buf
->ErrorData
;
639 sub_len
= le16_to_cpu(symlink
->SubstituteNameLength
);
640 sub_offset
= le16_to_cpu(symlink
->SubstituteNameOffset
);
641 *target_path
= cifs_strndup_from_utf16(
642 (char *)symlink
->PathBuffer
+ sub_offset
,
643 sub_len
, true, cifs_sb
->local_nls
);
644 if (!(*target_path
)) {
648 convert_delimiter(*target_path
, '/');
649 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
655 smb2_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
656 unsigned int epoch
, bool *purge_cache
)
659 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
661 if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
) {
662 cinode
->oplock
= CIFS_CACHE_RHW_FLG
;
663 cifs_dbg(FYI
, "Batch Oplock granted on inode %p\n",
665 } else if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
) {
666 cinode
->oplock
= CIFS_CACHE_RW_FLG
;
667 cifs_dbg(FYI
, "Exclusive Oplock granted on inode %p\n",
669 } else if (oplock
== SMB2_OPLOCK_LEVEL_II
) {
670 cinode
->oplock
= CIFS_CACHE_READ_FLG
;
671 cifs_dbg(FYI
, "Level II Oplock granted on inode %p\n",
678 smb21_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
679 unsigned int epoch
, bool *purge_cache
)
681 char message
[5] = {0};
684 if (oplock
== SMB2_OPLOCK_LEVEL_NOCHANGE
)
688 if (oplock
& SMB2_LEASE_READ_CACHING_HE
) {
689 cinode
->oplock
|= CIFS_CACHE_READ_FLG
;
690 strcat(message
, "R");
692 if (oplock
& SMB2_LEASE_HANDLE_CACHING_HE
) {
693 cinode
->oplock
|= CIFS_CACHE_HANDLE_FLG
;
694 strcat(message
, "H");
696 if (oplock
& SMB2_LEASE_WRITE_CACHING_HE
) {
697 cinode
->oplock
|= CIFS_CACHE_WRITE_FLG
;
698 strcat(message
, "W");
701 strcat(message
, "None");
702 cifs_dbg(FYI
, "%s Lease granted on inode %p\n", message
,
707 smb3_set_oplock_level(struct cifsInodeInfo
*cinode
, __u32 oplock
,
708 unsigned int epoch
, bool *purge_cache
)
710 unsigned int old_oplock
= cinode
->oplock
;
712 smb21_set_oplock_level(cinode
, oplock
, epoch
, purge_cache
);
715 *purge_cache
= false;
716 if (old_oplock
== CIFS_CACHE_READ_FLG
) {
717 if (cinode
->oplock
== CIFS_CACHE_READ_FLG
&&
718 (epoch
- cinode
->epoch
> 0))
720 else if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
721 (epoch
- cinode
->epoch
> 1))
723 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
724 (epoch
- cinode
->epoch
> 1))
726 else if (cinode
->oplock
== 0 &&
727 (epoch
- cinode
->epoch
> 0))
729 } else if (old_oplock
== CIFS_CACHE_RH_FLG
) {
730 if (cinode
->oplock
== CIFS_CACHE_RH_FLG
&&
731 (epoch
- cinode
->epoch
> 0))
733 else if (cinode
->oplock
== CIFS_CACHE_RHW_FLG
&&
734 (epoch
- cinode
->epoch
> 1))
737 cinode
->epoch
= epoch
;
742 smb2_is_read_op(__u32 oplock
)
744 return oplock
== SMB2_OPLOCK_LEVEL_II
;
748 smb21_is_read_op(__u32 oplock
)
750 return (oplock
& SMB2_LEASE_READ_CACHING_HE
) &&
751 !(oplock
& SMB2_LEASE_WRITE_CACHING_HE
);
755 map_oplock_to_lease(u8 oplock
)
757 if (oplock
== SMB2_OPLOCK_LEVEL_EXCLUSIVE
)
758 return SMB2_LEASE_WRITE_CACHING
| SMB2_LEASE_READ_CACHING
;
759 else if (oplock
== SMB2_OPLOCK_LEVEL_II
)
760 return SMB2_LEASE_READ_CACHING
;
761 else if (oplock
== SMB2_OPLOCK_LEVEL_BATCH
)
762 return SMB2_LEASE_HANDLE_CACHING
| SMB2_LEASE_READ_CACHING
|
763 SMB2_LEASE_WRITE_CACHING
;
768 smb2_create_lease_buf(u8
*lease_key
, u8 oplock
)
770 struct create_lease
*buf
;
772 buf
= kzalloc(sizeof(struct create_lease
), GFP_KERNEL
);
776 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
777 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
778 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
780 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
781 (struct create_lease
, lcontext
));
782 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context
));
783 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
784 (struct create_lease
, Name
));
785 buf
->ccontext
.NameLength
= cpu_to_le16(4);
794 smb3_create_lease_buf(u8
*lease_key
, u8 oplock
)
796 struct create_lease_v2
*buf
;
798 buf
= kzalloc(sizeof(struct create_lease_v2
), GFP_KERNEL
);
802 buf
->lcontext
.LeaseKeyLow
= cpu_to_le64(*((u64
*)lease_key
));
803 buf
->lcontext
.LeaseKeyHigh
= cpu_to_le64(*((u64
*)(lease_key
+ 8)));
804 buf
->lcontext
.LeaseState
= map_oplock_to_lease(oplock
);
806 buf
->ccontext
.DataOffset
= cpu_to_le16(offsetof
807 (struct create_lease_v2
, lcontext
));
808 buf
->ccontext
.DataLength
= cpu_to_le32(sizeof(struct lease_context_v2
));
809 buf
->ccontext
.NameOffset
= cpu_to_le16(offsetof
810 (struct create_lease_v2
, Name
));
811 buf
->ccontext
.NameLength
= cpu_to_le16(4);
820 smb2_parse_lease_buf(void *buf
, unsigned int *epoch
)
822 struct create_lease
*lc
= (struct create_lease
*)buf
;
824 *epoch
= 0; /* not used */
825 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
826 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
827 return le32_to_cpu(lc
->lcontext
.LeaseState
);
831 smb3_parse_lease_buf(void *buf
, unsigned int *epoch
)
833 struct create_lease_v2
*lc
= (struct create_lease_v2
*)buf
;
835 *epoch
= le16_to_cpu(lc
->lcontext
.Epoch
);
836 if (lc
->lcontext
.LeaseFlags
& SMB2_LEASE_FLAG_BREAK_IN_PROGRESS
)
837 return SMB2_OPLOCK_LEVEL_NOCHANGE
;
838 return le32_to_cpu(lc
->lcontext
.LeaseState
);
841 struct smb_version_operations smb20_operations
= {
842 .compare_fids
= smb2_compare_fids
,
843 .setup_request
= smb2_setup_request
,
844 .setup_async_request
= smb2_setup_async_request
,
845 .check_receive
= smb2_check_receive
,
846 .add_credits
= smb2_add_credits
,
847 .set_credits
= smb2_set_credits
,
848 .get_credits_field
= smb2_get_credits_field
,
849 .get_credits
= smb2_get_credits
,
850 .get_next_mid
= smb2_get_next_mid
,
851 .read_data_offset
= smb2_read_data_offset
,
852 .read_data_length
= smb2_read_data_length
,
853 .map_error
= map_smb2_to_linux_error
,
854 .find_mid
= smb2_find_mid
,
855 .check_message
= smb2_check_message
,
856 .dump_detail
= smb2_dump_detail
,
857 .clear_stats
= smb2_clear_stats
,
858 .print_stats
= smb2_print_stats
,
859 .is_oplock_break
= smb2_is_valid_oplock_break
,
860 .need_neg
= smb2_need_neg
,
861 .negotiate
= smb2_negotiate
,
862 .negotiate_wsize
= smb2_negotiate_wsize
,
863 .negotiate_rsize
= smb2_negotiate_rsize
,
864 .sess_setup
= SMB2_sess_setup
,
865 .logoff
= SMB2_logoff
,
866 .tree_connect
= SMB2_tcon
,
867 .tree_disconnect
= SMB2_tdis
,
868 .is_path_accessible
= smb2_is_path_accessible
,
869 .can_echo
= smb2_can_echo
,
871 .query_path_info
= smb2_query_path_info
,
872 .get_srv_inum
= smb2_get_srv_inum
,
873 .query_file_info
= smb2_query_file_info
,
874 .set_path_size
= smb2_set_path_size
,
875 .set_file_size
= smb2_set_file_size
,
876 .set_file_info
= smb2_set_file_info
,
878 .mkdir_setinfo
= smb2_mkdir_setinfo
,
880 .unlink
= smb2_unlink
,
881 .rename
= smb2_rename_path
,
882 .create_hardlink
= smb2_create_hardlink
,
883 .query_symlink
= smb2_query_symlink
,
884 .open
= smb2_open_file
,
885 .set_fid
= smb2_set_fid
,
886 .close
= smb2_close_file
,
887 .flush
= smb2_flush_file
,
888 .async_readv
= smb2_async_readv
,
889 .async_writev
= smb2_async_writev
,
890 .sync_read
= smb2_sync_read
,
891 .sync_write
= smb2_sync_write
,
892 .query_dir_first
= smb2_query_dir_first
,
893 .query_dir_next
= smb2_query_dir_next
,
894 .close_dir
= smb2_close_dir
,
895 .calc_smb_size
= smb2_calc_size
,
896 .is_status_pending
= smb2_is_status_pending
,
897 .oplock_response
= smb2_oplock_response
,
898 .queryfs
= smb2_queryfs
,
899 .mand_lock
= smb2_mand_lock
,
900 .mand_unlock_range
= smb2_unlock_range
,
901 .push_mand_locks
= smb2_push_mandatory_locks
,
902 .get_lease_key
= smb2_get_lease_key
,
903 .set_lease_key
= smb2_set_lease_key
,
904 .new_lease_key
= smb2_new_lease_key
,
905 .calc_signature
= smb2_calc_signature
,
906 .is_read_op
= smb2_is_read_op
,
907 .set_oplock_level
= smb2_set_oplock_level
,
908 .create_lease_buf
= smb2_create_lease_buf
,
909 .parse_lease_buf
= smb2_parse_lease_buf
,
912 struct smb_version_operations smb21_operations
= {
913 .compare_fids
= smb2_compare_fids
,
914 .setup_request
= smb2_setup_request
,
915 .setup_async_request
= smb2_setup_async_request
,
916 .check_receive
= smb2_check_receive
,
917 .add_credits
= smb2_add_credits
,
918 .set_credits
= smb2_set_credits
,
919 .get_credits_field
= smb2_get_credits_field
,
920 .get_credits
= smb2_get_credits
,
921 .get_next_mid
= smb2_get_next_mid
,
922 .read_data_offset
= smb2_read_data_offset
,
923 .read_data_length
= smb2_read_data_length
,
924 .map_error
= map_smb2_to_linux_error
,
925 .find_mid
= smb2_find_mid
,
926 .check_message
= smb2_check_message
,
927 .dump_detail
= smb2_dump_detail
,
928 .clear_stats
= smb2_clear_stats
,
929 .print_stats
= smb2_print_stats
,
930 .is_oplock_break
= smb2_is_valid_oplock_break
,
931 .need_neg
= smb2_need_neg
,
932 .negotiate
= smb2_negotiate
,
933 .negotiate_wsize
= smb2_negotiate_wsize
,
934 .negotiate_rsize
= smb2_negotiate_rsize
,
935 .sess_setup
= SMB2_sess_setup
,
936 .logoff
= SMB2_logoff
,
937 .tree_connect
= SMB2_tcon
,
938 .tree_disconnect
= SMB2_tdis
,
939 .is_path_accessible
= smb2_is_path_accessible
,
940 .can_echo
= smb2_can_echo
,
942 .query_path_info
= smb2_query_path_info
,
943 .get_srv_inum
= smb2_get_srv_inum
,
944 .query_file_info
= smb2_query_file_info
,
945 .set_path_size
= smb2_set_path_size
,
946 .set_file_size
= smb2_set_file_size
,
947 .set_file_info
= smb2_set_file_info
,
949 .mkdir_setinfo
= smb2_mkdir_setinfo
,
951 .unlink
= smb2_unlink
,
952 .rename
= smb2_rename_path
,
953 .create_hardlink
= smb2_create_hardlink
,
954 .query_symlink
= smb2_query_symlink
,
955 .open
= smb2_open_file
,
956 .set_fid
= smb2_set_fid
,
957 .close
= smb2_close_file
,
958 .flush
= smb2_flush_file
,
959 .async_readv
= smb2_async_readv
,
960 .async_writev
= smb2_async_writev
,
961 .sync_read
= smb2_sync_read
,
962 .sync_write
= smb2_sync_write
,
963 .query_dir_first
= smb2_query_dir_first
,
964 .query_dir_next
= smb2_query_dir_next
,
965 .close_dir
= smb2_close_dir
,
966 .calc_smb_size
= smb2_calc_size
,
967 .is_status_pending
= smb2_is_status_pending
,
968 .oplock_response
= smb2_oplock_response
,
969 .queryfs
= smb2_queryfs
,
970 .mand_lock
= smb2_mand_lock
,
971 .mand_unlock_range
= smb2_unlock_range
,
972 .push_mand_locks
= smb2_push_mandatory_locks
,
973 .get_lease_key
= smb2_get_lease_key
,
974 .set_lease_key
= smb2_set_lease_key
,
975 .new_lease_key
= smb2_new_lease_key
,
976 .calc_signature
= smb2_calc_signature
,
977 .is_read_op
= smb21_is_read_op
,
978 .set_oplock_level
= smb21_set_oplock_level
,
979 .create_lease_buf
= smb2_create_lease_buf
,
980 .parse_lease_buf
= smb2_parse_lease_buf
,
983 struct smb_version_operations smb30_operations
= {
984 .compare_fids
= smb2_compare_fids
,
985 .setup_request
= smb2_setup_request
,
986 .setup_async_request
= smb2_setup_async_request
,
987 .check_receive
= smb2_check_receive
,
988 .add_credits
= smb2_add_credits
,
989 .set_credits
= smb2_set_credits
,
990 .get_credits_field
= smb2_get_credits_field
,
991 .get_credits
= smb2_get_credits
,
992 .get_next_mid
= smb2_get_next_mid
,
993 .read_data_offset
= smb2_read_data_offset
,
994 .read_data_length
= smb2_read_data_length
,
995 .map_error
= map_smb2_to_linux_error
,
996 .find_mid
= smb2_find_mid
,
997 .check_message
= smb2_check_message
,
998 .dump_detail
= smb2_dump_detail
,
999 .clear_stats
= smb2_clear_stats
,
1000 .print_stats
= smb2_print_stats
,
1001 .dump_share_caps
= smb2_dump_share_caps
,
1002 .is_oplock_break
= smb2_is_valid_oplock_break
,
1003 .need_neg
= smb2_need_neg
,
1004 .negotiate
= smb2_negotiate
,
1005 .negotiate_wsize
= smb2_negotiate_wsize
,
1006 .negotiate_rsize
= smb2_negotiate_rsize
,
1007 .sess_setup
= SMB2_sess_setup
,
1008 .logoff
= SMB2_logoff
,
1009 .tree_connect
= SMB2_tcon
,
1010 .tree_disconnect
= SMB2_tdis
,
1011 .is_path_accessible
= smb2_is_path_accessible
,
1012 .can_echo
= smb2_can_echo
,
1014 .query_path_info
= smb2_query_path_info
,
1015 .get_srv_inum
= smb2_get_srv_inum
,
1016 .query_file_info
= smb2_query_file_info
,
1017 .set_path_size
= smb2_set_path_size
,
1018 .set_file_size
= smb2_set_file_size
,
1019 .set_file_info
= smb2_set_file_info
,
1020 .mkdir
= smb2_mkdir
,
1021 .mkdir_setinfo
= smb2_mkdir_setinfo
,
1022 .rmdir
= smb2_rmdir
,
1023 .unlink
= smb2_unlink
,
1024 .rename
= smb2_rename_path
,
1025 .create_hardlink
= smb2_create_hardlink
,
1026 .query_symlink
= smb2_query_symlink
,
1027 .open
= smb2_open_file
,
1028 .set_fid
= smb2_set_fid
,
1029 .close
= smb2_close_file
,
1030 .flush
= smb2_flush_file
,
1031 .async_readv
= smb2_async_readv
,
1032 .async_writev
= smb2_async_writev
,
1033 .sync_read
= smb2_sync_read
,
1034 .sync_write
= smb2_sync_write
,
1035 .query_dir_first
= smb2_query_dir_first
,
1036 .query_dir_next
= smb2_query_dir_next
,
1037 .close_dir
= smb2_close_dir
,
1038 .calc_smb_size
= smb2_calc_size
,
1039 .is_status_pending
= smb2_is_status_pending
,
1040 .oplock_response
= smb2_oplock_response
,
1041 .queryfs
= smb2_queryfs
,
1042 .mand_lock
= smb2_mand_lock
,
1043 .mand_unlock_range
= smb2_unlock_range
,
1044 .push_mand_locks
= smb2_push_mandatory_locks
,
1045 .get_lease_key
= smb2_get_lease_key
,
1046 .set_lease_key
= smb2_set_lease_key
,
1047 .new_lease_key
= smb2_new_lease_key
,
1048 .generate_signingkey
= generate_smb3signingkey
,
1049 .calc_signature
= smb3_calc_signature
,
1050 .is_read_op
= smb21_is_read_op
,
1051 .set_oplock_level
= smb3_set_oplock_level
,
1052 .create_lease_buf
= smb3_create_lease_buf
,
1053 .parse_lease_buf
= smb3_parse_lease_buf
,
1056 struct smb_version_values smb20_values
= {
1057 .version_string
= SMB20_VERSION_STRING
,
1058 .protocol_id
= SMB20_PROT_ID
,
1059 .req_capabilities
= 0, /* MBZ */
1060 .large_lock_type
= 0,
1061 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
1062 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
1063 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
1064 .header_size
= sizeof(struct smb2_hdr
),
1065 .max_header_size
= MAX_SMB2_HDR_SIZE
,
1066 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
1067 .lock_cmd
= SMB2_LOCK
,
1069 .cap_nt_find
= SMB2_NT_FIND
,
1070 .cap_large_files
= SMB2_LARGE_FILES
,
1071 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1072 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1073 .create_lease_size
= sizeof(struct create_lease
),
1076 struct smb_version_values smb21_values
= {
1077 .version_string
= SMB21_VERSION_STRING
,
1078 .protocol_id
= SMB21_PROT_ID
,
1079 .req_capabilities
= 0, /* MBZ on negotiate req until SMB3 dialect */
1080 .large_lock_type
= 0,
1081 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
1082 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
1083 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
1084 .header_size
= sizeof(struct smb2_hdr
),
1085 .max_header_size
= MAX_SMB2_HDR_SIZE
,
1086 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
1087 .lock_cmd
= SMB2_LOCK
,
1089 .cap_nt_find
= SMB2_NT_FIND
,
1090 .cap_large_files
= SMB2_LARGE_FILES
,
1091 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1092 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1093 .create_lease_size
= sizeof(struct create_lease
),
1096 struct smb_version_values smb30_values
= {
1097 .version_string
= SMB30_VERSION_STRING
,
1098 .protocol_id
= SMB30_PROT_ID
,
1099 .req_capabilities
= SMB2_GLOBAL_CAP_DFS
| SMB2_GLOBAL_CAP_LEASING
| SMB2_GLOBAL_CAP_LARGE_MTU
,
1100 .large_lock_type
= 0,
1101 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
1102 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
1103 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
1104 .header_size
= sizeof(struct smb2_hdr
),
1105 .max_header_size
= MAX_SMB2_HDR_SIZE
,
1106 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
1107 .lock_cmd
= SMB2_LOCK
,
1109 .cap_nt_find
= SMB2_NT_FIND
,
1110 .cap_large_files
= SMB2_LARGE_FILES
,
1111 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1112 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1113 .create_lease_size
= sizeof(struct create_lease_v2
),
1116 struct smb_version_values smb302_values
= {
1117 .version_string
= SMB302_VERSION_STRING
,
1118 .protocol_id
= SMB302_PROT_ID
,
1119 .req_capabilities
= SMB2_GLOBAL_CAP_DFS
| SMB2_GLOBAL_CAP_LEASING
| SMB2_GLOBAL_CAP_LARGE_MTU
,
1120 .large_lock_type
= 0,
1121 .exclusive_lock_type
= SMB2_LOCKFLAG_EXCLUSIVE_LOCK
,
1122 .shared_lock_type
= SMB2_LOCKFLAG_SHARED_LOCK
,
1123 .unlock_lock_type
= SMB2_LOCKFLAG_UNLOCK
,
1124 .header_size
= sizeof(struct smb2_hdr
),
1125 .max_header_size
= MAX_SMB2_HDR_SIZE
,
1126 .read_rsp_size
= sizeof(struct smb2_read_rsp
) - 1,
1127 .lock_cmd
= SMB2_LOCK
,
1129 .cap_nt_find
= SMB2_NT_FIND
,
1130 .cap_large_files
= SMB2_LARGE_FILES
,
1131 .signing_enabled
= SMB2_NEGOTIATE_SIGNING_ENABLED
| SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1132 .signing_required
= SMB2_NEGOTIATE_SIGNING_REQUIRED
,
1133 .create_lease_size
= sizeof(struct create_lease_v2
),