2 * SMB1 (CIFS) 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>
23 #include "cifsproto.h"
24 #include "cifs_debug.h"
26 #include "cifs_unicode.h"
29 * An NT cancel request header looks just like the original request except:
31 * The Command is SMB_COM_NT_CANCEL
32 * The WordCount is zeroed out
33 * The ByteCount is zeroed out
35 * This function mangles an existing request buffer into a
36 * SMB_COM_NT_CANCEL request and then sends it.
39 send_nt_cancel(struct TCP_Server_Info
*server
, void *buf
,
40 struct mid_q_entry
*mid
)
43 struct smb_hdr
*in_buf
= (struct smb_hdr
*)buf
;
45 /* -4 for RFC1001 length and +2 for BCC field */
46 in_buf
->smb_buf_length
= cpu_to_be32(sizeof(struct smb_hdr
) - 4 + 2);
47 in_buf
->Command
= SMB_COM_NT_CANCEL
;
48 in_buf
->WordCount
= 0;
51 mutex_lock(&server
->srv_mutex
);
52 rc
= cifs_sign_smb(in_buf
, server
, &mid
->sequence_number
);
54 mutex_unlock(&server
->srv_mutex
);
59 * The response to this call was already factored into the sequence
60 * number when the call went out, so we must adjust it back downward
63 --server
->sequence_number
;
64 rc
= smb_send(server
, in_buf
, be32_to_cpu(in_buf
->smb_buf_length
));
66 server
->sequence_number
--;
68 mutex_unlock(&server
->srv_mutex
);
70 cifs_dbg(FYI
, "issued NT_CANCEL for mid %u, rc = %d\n",
77 cifs_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
79 return ob1
->fid
.netfid
== ob2
->fid
.netfid
;
83 cifs_read_data_offset(char *buf
)
85 READ_RSP
*rsp
= (READ_RSP
*)buf
;
86 return le16_to_cpu(rsp
->DataOffset
);
90 cifs_read_data_length(char *buf
)
92 READ_RSP
*rsp
= (READ_RSP
*)buf
;
93 return (le16_to_cpu(rsp
->DataLengthHigh
) << 16) +
94 le16_to_cpu(rsp
->DataLength
);
97 static struct mid_q_entry
*
98 cifs_find_mid(struct TCP_Server_Info
*server
, char *buffer
)
100 struct smb_hdr
*buf
= (struct smb_hdr
*)buffer
;
101 struct mid_q_entry
*mid
;
103 spin_lock(&GlobalMid_Lock
);
104 list_for_each_entry(mid
, &server
->pending_mid_q
, qhead
) {
105 if (compare_mid(mid
->mid
, buf
) &&
106 mid
->mid_state
== MID_REQUEST_SUBMITTED
&&
107 le16_to_cpu(mid
->command
) == buf
->Command
) {
108 spin_unlock(&GlobalMid_Lock
);
112 spin_unlock(&GlobalMid_Lock
);
117 cifs_add_credits(struct TCP_Server_Info
*server
, const unsigned int add
,
120 spin_lock(&server
->req_lock
);
121 server
->credits
+= add
;
123 spin_unlock(&server
->req_lock
);
124 wake_up(&server
->request_q
);
128 cifs_set_credits(struct TCP_Server_Info
*server
, const int val
)
130 spin_lock(&server
->req_lock
);
131 server
->credits
= val
;
132 server
->oplocks
= val
> 1 ? enable_oplocks
: false;
133 spin_unlock(&server
->req_lock
);
137 cifs_get_credits_field(struct TCP_Server_Info
*server
, const int optype
)
139 return &server
->credits
;
143 cifs_get_credits(struct mid_q_entry
*mid
)
149 * Find a free multiplex id (SMB mid). Otherwise there could be
150 * mid collisions which might cause problems, demultiplexing the
151 * wrong response to this request. Multiplex ids could collide if
152 * one of a series requests takes much longer than the others, or
153 * if a very large number of long lived requests (byte range
154 * locks or FindNotify requests) are pending. No more than
155 * 64K-1 requests can be outstanding at one time. If no
156 * mids are available, return zero. A future optimization
157 * could make the combination of mids and uid the key we use
158 * to demultiplex on (rather than mid alone).
159 * In addition to the above check, the cifs demultiplex
160 * code already used the command code as a secondary
161 * check of the frame and if signing is negotiated the
162 * response would be discarded if the mid were the same
163 * but the signature was wrong. Since the mid is not put in the
164 * pending queue until later (when it is about to be dispatched)
165 * we do have to limit the number of outstanding requests
166 * to somewhat less than 64K-1 although it is hard to imagine
167 * so many threads being in the vfs at one time.
170 cifs_get_next_mid(struct TCP_Server_Info
*server
)
173 __u16 last_mid
, cur_mid
;
176 spin_lock(&GlobalMid_Lock
);
178 /* mid is 16 bit only for CIFS/SMB */
179 cur_mid
= (__u16
)((server
->CurrentMid
) & 0xffff);
180 /* we do not want to loop forever */
185 * This nested loop looks more expensive than it is.
186 * In practice the list of pending requests is short,
187 * fewer than 50, and the mids are likely to be unique
188 * on the first pass through the loop unless some request
189 * takes longer than the 64 thousand requests before it
190 * (and it would also have to have been a request that
193 while (cur_mid
!= last_mid
) {
194 struct mid_q_entry
*mid_entry
;
195 unsigned int num_mids
;
202 list_for_each_entry(mid_entry
, &server
->pending_mid_q
, qhead
) {
204 if (mid_entry
->mid
== cur_mid
&&
205 mid_entry
->mid_state
== MID_REQUEST_SUBMITTED
) {
206 /* This mid is in use, try a different one */
213 * if we have more than 32k mids in the list, then something
214 * is very wrong. Possibly a local user is trying to DoS the
215 * box by issuing long-running calls and SIGKILL'ing them. If
216 * we get to 2^16 mids then we're in big trouble as this
217 * function could loop forever.
219 * Go ahead and assign out the mid in this situation, but force
220 * an eventual reconnect to clean out the pending_mid_q.
222 if (num_mids
> 32768)
223 server
->tcpStatus
= CifsNeedReconnect
;
226 mid
= (__u64
)cur_mid
;
227 server
->CurrentMid
= mid
;
232 spin_unlock(&GlobalMid_Lock
);
238 0 not a transact2, or all data present
239 >0 transact2 with that much data missing
240 -EINVAL invalid transact2
243 check2ndT2(char *buf
)
245 struct smb_hdr
*pSMB
= (struct smb_hdr
*)buf
;
246 struct smb_t2_rsp
*pSMBt
;
248 __u16 total_data_size
, data_in_this_rsp
;
250 if (pSMB
->Command
!= SMB_COM_TRANSACTION2
)
253 /* check for plausible wct, bcc and t2 data and parm sizes */
254 /* check for parm and data offset going beyond end of smb */
255 if (pSMB
->WordCount
!= 10) { /* coalesce_t2 depends on this */
256 cifs_dbg(FYI
, "invalid transact2 word count\n");
260 pSMBt
= (struct smb_t2_rsp
*)pSMB
;
262 total_data_size
= get_unaligned_le16(&pSMBt
->t2_rsp
.TotalDataCount
);
263 data_in_this_rsp
= get_unaligned_le16(&pSMBt
->t2_rsp
.DataCount
);
265 if (total_data_size
== data_in_this_rsp
)
267 else if (total_data_size
< data_in_this_rsp
) {
268 cifs_dbg(FYI
, "total data %d smaller than data in frame %d\n",
269 total_data_size
, data_in_this_rsp
);
273 remaining
= total_data_size
- data_in_this_rsp
;
275 cifs_dbg(FYI
, "missing %d bytes from transact2, check next response\n",
277 if (total_data_size
> CIFSMaxBufSize
) {
278 cifs_dbg(VFS
, "TotalDataSize %d is over maximum buffer %d\n",
279 total_data_size
, CIFSMaxBufSize
);
286 coalesce_t2(char *second_buf
, struct smb_hdr
*target_hdr
)
288 struct smb_t2_rsp
*pSMBs
= (struct smb_t2_rsp
*)second_buf
;
289 struct smb_t2_rsp
*pSMBt
= (struct smb_t2_rsp
*)target_hdr
;
290 char *data_area_of_tgt
;
291 char *data_area_of_src
;
293 unsigned int byte_count
, total_in_tgt
;
294 __u16 tgt_total_cnt
, src_total_cnt
, total_in_src
;
296 src_total_cnt
= get_unaligned_le16(&pSMBs
->t2_rsp
.TotalDataCount
);
297 tgt_total_cnt
= get_unaligned_le16(&pSMBt
->t2_rsp
.TotalDataCount
);
299 if (tgt_total_cnt
!= src_total_cnt
)
300 cifs_dbg(FYI
, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
301 src_total_cnt
, tgt_total_cnt
);
303 total_in_tgt
= get_unaligned_le16(&pSMBt
->t2_rsp
.DataCount
);
305 remaining
= tgt_total_cnt
- total_in_tgt
;
308 cifs_dbg(FYI
, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n",
309 tgt_total_cnt
, total_in_tgt
);
313 if (remaining
== 0) {
314 /* nothing to do, ignore */
315 cifs_dbg(FYI
, "no more data remains\n");
319 total_in_src
= get_unaligned_le16(&pSMBs
->t2_rsp
.DataCount
);
320 if (remaining
< total_in_src
)
321 cifs_dbg(FYI
, "transact2 2nd response contains too much data\n");
323 /* find end of first SMB data area */
324 data_area_of_tgt
= (char *)&pSMBt
->hdr
.Protocol
+
325 get_unaligned_le16(&pSMBt
->t2_rsp
.DataOffset
);
327 /* validate target area */
328 data_area_of_src
= (char *)&pSMBs
->hdr
.Protocol
+
329 get_unaligned_le16(&pSMBs
->t2_rsp
.DataOffset
);
331 data_area_of_tgt
+= total_in_tgt
;
333 total_in_tgt
+= total_in_src
;
334 /* is the result too big for the field? */
335 if (total_in_tgt
> USHRT_MAX
) {
336 cifs_dbg(FYI
, "coalesced DataCount too large (%u)\n",
340 put_unaligned_le16(total_in_tgt
, &pSMBt
->t2_rsp
.DataCount
);
343 byte_count
= get_bcc(target_hdr
);
344 byte_count
+= total_in_src
;
345 /* is the result too big for the field? */
346 if (byte_count
> USHRT_MAX
) {
347 cifs_dbg(FYI
, "coalesced BCC too large (%u)\n", byte_count
);
350 put_bcc(byte_count
, target_hdr
);
352 byte_count
= be32_to_cpu(target_hdr
->smb_buf_length
);
353 byte_count
+= total_in_src
;
354 /* don't allow buffer to overflow */
355 if (byte_count
> CIFSMaxBufSize
+ MAX_CIFS_HDR_SIZE
- 4) {
356 cifs_dbg(FYI
, "coalesced BCC exceeds buffer size (%u)\n",
360 target_hdr
->smb_buf_length
= cpu_to_be32(byte_count
);
362 /* copy second buffer into end of first buffer */
363 memcpy(data_area_of_tgt
, data_area_of_src
, total_in_src
);
365 if (remaining
!= total_in_src
) {
366 /* more responses to go */
367 cifs_dbg(FYI
, "waiting for more secondary responses\n");
372 cifs_dbg(FYI
, "found the last secondary response\n");
377 cifs_downgrade_oplock(struct TCP_Server_Info
*server
,
378 struct cifsInodeInfo
*cinode
, bool set_level2
)
381 cifs_set_oplock_level(cinode
, OPLOCK_READ
);
383 cifs_set_oplock_level(cinode
, 0);
387 cifs_check_trans2(struct mid_q_entry
*mid
, struct TCP_Server_Info
*server
,
388 char *buf
, int malformed
)
392 if (check2ndT2(buf
) <= 0)
394 mid
->multiRsp
= true;
396 /* merge response - fix up 1st*/
397 malformed
= coalesce_t2(buf
, mid
->resp_buf
);
400 /* All parts received or packet is malformed. */
401 mid
->multiEnd
= true;
402 dequeue_mid(mid
, malformed
);
405 if (!server
->large_buf
) {
406 /*FIXME: switch to already allocated largebuf?*/
407 cifs_dbg(VFS
, "1st trans2 resp needs bigbuf\n");
409 /* Have first buffer */
411 mid
->large_buf
= true;
412 server
->bigbuf
= NULL
;
418 cifs_need_neg(struct TCP_Server_Info
*server
)
420 return server
->maxBuf
== 0;
424 cifs_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
427 rc
= CIFSSMBNegotiate(xid
, ses
);
429 /* retry only once on 1st time connection */
430 set_credits(ses
->server
, 1);
431 rc
= CIFSSMBNegotiate(xid
, ses
);
439 cifs_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
441 __u64 unix_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
442 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
445 /* start with specified wsize, or default */
446 if (volume_info
->wsize
)
447 wsize
= volume_info
->wsize
;
448 else if (tcon
->unix_ext
&& (unix_cap
& CIFS_UNIX_LARGE_WRITE_CAP
))
449 wsize
= CIFS_DEFAULT_IOSIZE
;
451 wsize
= CIFS_DEFAULT_NON_POSIX_WSIZE
;
453 /* can server support 24-bit write sizes? (via UNIX extensions) */
454 if (!tcon
->unix_ext
|| !(unix_cap
& CIFS_UNIX_LARGE_WRITE_CAP
))
455 wsize
= min_t(unsigned int, wsize
, CIFS_MAX_RFC1002_WSIZE
);
458 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
459 * Limit it to max buffer offered by the server, minus the size of the
460 * WRITEX header, not including the 4 byte RFC1001 length.
462 if (!(server
->capabilities
& CAP_LARGE_WRITE_X
) ||
463 (!(server
->capabilities
& CAP_UNIX
) && server
->sign
))
464 wsize
= min_t(unsigned int, wsize
,
465 server
->maxBuf
- sizeof(WRITE_REQ
) + 4);
467 /* hard limit of CIFS_MAX_WSIZE */
468 wsize
= min_t(unsigned int, wsize
, CIFS_MAX_WSIZE
);
474 cifs_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
476 __u64 unix_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
477 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
478 unsigned int rsize
, defsize
;
481 * Set default value...
483 * HACK alert! Ancient servers have very small buffers. Even though
484 * MS-CIFS indicates that servers are only limited by the client's
485 * bufsize for reads, testing against win98se shows that it throws
486 * INVALID_PARAMETER errors if you try to request too large a read.
487 * OS/2 just sends back short reads.
489 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
490 * it can't handle a read request larger than its MaxBufferSize either.
492 if (tcon
->unix_ext
&& (unix_cap
& CIFS_UNIX_LARGE_READ_CAP
))
493 defsize
= CIFS_DEFAULT_IOSIZE
;
494 else if (server
->capabilities
& CAP_LARGE_READ_X
)
495 defsize
= CIFS_DEFAULT_NON_POSIX_RSIZE
;
497 defsize
= server
->maxBuf
- sizeof(READ_RSP
);
499 rsize
= volume_info
->rsize
? volume_info
->rsize
: defsize
;
502 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
503 * the client's MaxBufferSize.
505 if (!(server
->capabilities
& CAP_LARGE_READ_X
))
506 rsize
= min_t(unsigned int, CIFSMaxBufSize
, rsize
);
508 /* hard limit of CIFS_MAX_RSIZE */
509 rsize
= min_t(unsigned int, rsize
, CIFS_MAX_RSIZE
);
515 cifs_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
)
517 CIFSSMBQFSDeviceInfo(xid
, tcon
);
518 CIFSSMBQFSAttributeInfo(xid
, tcon
);
522 cifs_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
523 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
526 FILE_ALL_INFO
*file_info
;
528 file_info
= kmalloc(sizeof(FILE_ALL_INFO
), GFP_KERNEL
);
529 if (file_info
== NULL
)
532 rc
= CIFSSMBQPathInfo(xid
, tcon
, full_path
, file_info
,
533 0 /* not legacy */, cifs_sb
->local_nls
,
534 cifs_remap(cifs_sb
));
536 if (rc
== -EOPNOTSUPP
|| rc
== -EINVAL
)
537 rc
= SMBQueryInformation(xid
, tcon
, full_path
, file_info
,
538 cifs_sb
->local_nls
, cifs_remap(cifs_sb
));
544 cifs_query_path_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
545 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
546 FILE_ALL_INFO
*data
, bool *adjustTZ
, bool *symlink
)
552 /* could do find first instead but this returns more info */
553 rc
= CIFSSMBQPathInfo(xid
, tcon
, full_path
, data
, 0 /* not legacy */,
554 cifs_sb
->local_nls
, cifs_remap(cifs_sb
));
556 * BB optimize code so we do not make the above call when server claims
557 * no NT SMB support and the above call failed at least once - set flag
560 if ((rc
== -EOPNOTSUPP
) || (rc
== -EINVAL
)) {
561 rc
= SMBQueryInformation(xid
, tcon
, full_path
, data
,
563 cifs_remap(cifs_sb
));
567 if (!rc
&& (le32_to_cpu(data
->Attributes
) & ATTR_REPARSE
)) {
571 struct cifs_open_parms oparms
;
574 oparms
.cifs_sb
= cifs_sb
;
575 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
576 oparms
.create_options
= 0;
577 oparms
.disposition
= FILE_OPEN
;
578 oparms
.path
= full_path
;
580 oparms
.reconnect
= false;
582 /* Need to check if this is a symbolic link or not */
583 tmprc
= CIFS_open(xid
, &oparms
, &oplock
, NULL
);
584 if (tmprc
== -EOPNOTSUPP
)
587 CIFSSMBClose(xid
, tcon
, fid
.netfid
);
594 cifs_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
595 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
596 u64
*uniqueid
, FILE_ALL_INFO
*data
)
599 * We can not use the IndexNumber field by default from Windows or
600 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
601 * CIFS spec claims that this value is unique within the scope of a
602 * share, and the windows docs hint that it's actually unique
605 * There may be higher info levels that work but are there Windows
606 * server or network appliances for which IndexNumber field is not
609 return CIFSGetSrvInodeNumber(xid
, tcon
, full_path
, uniqueid
,
611 cifs_remap(cifs_sb
));
615 cifs_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
616 struct cifs_fid
*fid
, FILE_ALL_INFO
*data
)
618 return CIFSSMBQFileInfo(xid
, tcon
, fid
->netfid
, data
);
622 cifs_clear_stats(struct cifs_tcon
*tcon
)
624 #ifdef CONFIG_CIFS_STATS
625 atomic_set(&tcon
->stats
.cifs_stats
.num_writes
, 0);
626 atomic_set(&tcon
->stats
.cifs_stats
.num_reads
, 0);
627 atomic_set(&tcon
->stats
.cifs_stats
.num_flushes
, 0);
628 atomic_set(&tcon
->stats
.cifs_stats
.num_oplock_brks
, 0);
629 atomic_set(&tcon
->stats
.cifs_stats
.num_opens
, 0);
630 atomic_set(&tcon
->stats
.cifs_stats
.num_posixopens
, 0);
631 atomic_set(&tcon
->stats
.cifs_stats
.num_posixmkdirs
, 0);
632 atomic_set(&tcon
->stats
.cifs_stats
.num_closes
, 0);
633 atomic_set(&tcon
->stats
.cifs_stats
.num_deletes
, 0);
634 atomic_set(&tcon
->stats
.cifs_stats
.num_mkdirs
, 0);
635 atomic_set(&tcon
->stats
.cifs_stats
.num_rmdirs
, 0);
636 atomic_set(&tcon
->stats
.cifs_stats
.num_renames
, 0);
637 atomic_set(&tcon
->stats
.cifs_stats
.num_t2renames
, 0);
638 atomic_set(&tcon
->stats
.cifs_stats
.num_ffirst
, 0);
639 atomic_set(&tcon
->stats
.cifs_stats
.num_fnext
, 0);
640 atomic_set(&tcon
->stats
.cifs_stats
.num_fclose
, 0);
641 atomic_set(&tcon
->stats
.cifs_stats
.num_hardlinks
, 0);
642 atomic_set(&tcon
->stats
.cifs_stats
.num_symlinks
, 0);
643 atomic_set(&tcon
->stats
.cifs_stats
.num_locks
, 0);
644 atomic_set(&tcon
->stats
.cifs_stats
.num_acl_get
, 0);
645 atomic_set(&tcon
->stats
.cifs_stats
.num_acl_set
, 0);
650 cifs_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
652 #ifdef CONFIG_CIFS_STATS
653 seq_printf(m
, " Oplocks breaks: %d",
654 atomic_read(&tcon
->stats
.cifs_stats
.num_oplock_brks
));
655 seq_printf(m
, "\nReads: %d Bytes: %llu",
656 atomic_read(&tcon
->stats
.cifs_stats
.num_reads
),
657 (long long)(tcon
->bytes_read
));
658 seq_printf(m
, "\nWrites: %d Bytes: %llu",
659 atomic_read(&tcon
->stats
.cifs_stats
.num_writes
),
660 (long long)(tcon
->bytes_written
));
661 seq_printf(m
, "\nFlushes: %d",
662 atomic_read(&tcon
->stats
.cifs_stats
.num_flushes
));
663 seq_printf(m
, "\nLocks: %d HardLinks: %d Symlinks: %d",
664 atomic_read(&tcon
->stats
.cifs_stats
.num_locks
),
665 atomic_read(&tcon
->stats
.cifs_stats
.num_hardlinks
),
666 atomic_read(&tcon
->stats
.cifs_stats
.num_symlinks
));
667 seq_printf(m
, "\nOpens: %d Closes: %d Deletes: %d",
668 atomic_read(&tcon
->stats
.cifs_stats
.num_opens
),
669 atomic_read(&tcon
->stats
.cifs_stats
.num_closes
),
670 atomic_read(&tcon
->stats
.cifs_stats
.num_deletes
));
671 seq_printf(m
, "\nPosix Opens: %d Posix Mkdirs: %d",
672 atomic_read(&tcon
->stats
.cifs_stats
.num_posixopens
),
673 atomic_read(&tcon
->stats
.cifs_stats
.num_posixmkdirs
));
674 seq_printf(m
, "\nMkdirs: %d Rmdirs: %d",
675 atomic_read(&tcon
->stats
.cifs_stats
.num_mkdirs
),
676 atomic_read(&tcon
->stats
.cifs_stats
.num_rmdirs
));
677 seq_printf(m
, "\nRenames: %d T2 Renames %d",
678 atomic_read(&tcon
->stats
.cifs_stats
.num_renames
),
679 atomic_read(&tcon
->stats
.cifs_stats
.num_t2renames
));
680 seq_printf(m
, "\nFindFirst: %d FNext %d FClose %d",
681 atomic_read(&tcon
->stats
.cifs_stats
.num_ffirst
),
682 atomic_read(&tcon
->stats
.cifs_stats
.num_fnext
),
683 atomic_read(&tcon
->stats
.cifs_stats
.num_fclose
));
688 cifs_mkdir_setinfo(struct inode
*inode
, const char *full_path
,
689 struct cifs_sb_info
*cifs_sb
, struct cifs_tcon
*tcon
,
690 const unsigned int xid
)
692 FILE_BASIC_INFO info
;
693 struct cifsInodeInfo
*cifsInode
;
697 memset(&info
, 0, sizeof(info
));
698 cifsInode
= CIFS_I(inode
);
699 dosattrs
= cifsInode
->cifsAttrs
|ATTR_READONLY
;
700 info
.Attributes
= cpu_to_le32(dosattrs
);
701 rc
= CIFSSMBSetPathInfo(xid
, tcon
, full_path
, &info
, cifs_sb
->local_nls
,
702 cifs_remap(cifs_sb
));
704 cifsInode
->cifsAttrs
= dosattrs
;
708 cifs_open_file(const unsigned int xid
, struct cifs_open_parms
*oparms
,
709 __u32
*oplock
, FILE_ALL_INFO
*buf
)
711 if (!(oparms
->tcon
->ses
->capabilities
& CAP_NT_SMBS
))
712 return SMBLegacyOpen(xid
, oparms
->tcon
, oparms
->path
,
714 oparms
->desired_access
,
715 oparms
->create_options
,
716 &oparms
->fid
->netfid
, oplock
, buf
,
717 oparms
->cifs_sb
->local_nls
,
718 cifs_remap(oparms
->cifs_sb
));
719 return CIFS_open(xid
, oparms
, oplock
, buf
);
723 cifs_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
725 struct cifsInodeInfo
*cinode
= CIFS_I(d_inode(cfile
->dentry
));
726 cfile
->fid
.netfid
= fid
->netfid
;
727 cifs_set_oplock_level(cinode
, oplock
);
728 cinode
->can_cache_brlcks
= CIFS_CACHE_WRITE(cinode
);
732 cifs_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
733 struct cifs_fid
*fid
)
735 CIFSSMBClose(xid
, tcon
, fid
->netfid
);
739 cifs_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
740 struct cifs_fid
*fid
)
742 return CIFSSMBFlush(xid
, tcon
, fid
->netfid
);
746 cifs_sync_read(const unsigned int xid
, struct cifs_fid
*pfid
,
747 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
748 char **buf
, int *buf_type
)
750 parms
->netfid
= pfid
->netfid
;
751 return CIFSSMBRead(xid
, parms
, bytes_read
, buf
, buf_type
);
755 cifs_sync_write(const unsigned int xid
, struct cifs_fid
*pfid
,
756 struct cifs_io_parms
*parms
, unsigned int *written
,
757 struct kvec
*iov
, unsigned long nr_segs
)
760 parms
->netfid
= pfid
->netfid
;
761 return CIFSSMBWrite2(xid
, parms
, written
, iov
, nr_segs
);
765 smb_set_file_info(struct inode
*inode
, const char *full_path
,
766 FILE_BASIC_INFO
*buf
, const unsigned int xid
)
772 struct cifs_open_parms oparms
;
773 struct cifsFileInfo
*open_file
;
774 struct cifsInodeInfo
*cinode
= CIFS_I(inode
);
775 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
776 struct tcon_link
*tlink
= NULL
;
777 struct cifs_tcon
*tcon
;
779 /* if the file is already open for write, just use that fileid */
780 open_file
= find_writable_file(cinode
, true);
782 fid
.netfid
= open_file
->fid
.netfid
;
783 netpid
= open_file
->pid
;
784 tcon
= tlink_tcon(open_file
->tlink
);
785 goto set_via_filehandle
;
788 tlink
= cifs_sb_tlink(cifs_sb
);
794 tcon
= tlink_tcon(tlink
);
796 rc
= CIFSSMBSetPathInfo(xid
, tcon
, full_path
, buf
, cifs_sb
->local_nls
,
797 cifs_remap(cifs_sb
));
799 cinode
->cifsAttrs
= le32_to_cpu(buf
->Attributes
);
801 } else if (rc
!= -EOPNOTSUPP
&& rc
!= -EINVAL
) {
806 oparms
.cifs_sb
= cifs_sb
;
807 oparms
.desired_access
= SYNCHRONIZE
| FILE_WRITE_ATTRIBUTES
;
808 oparms
.create_options
= CREATE_NOT_DIR
;
809 oparms
.disposition
= FILE_OPEN
;
810 oparms
.path
= full_path
;
812 oparms
.reconnect
= false;
814 cifs_dbg(FYI
, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
815 rc
= CIFS_open(xid
, &oparms
, &oplock
, NULL
);
822 netpid
= current
->tgid
;
825 rc
= CIFSSMBSetFileInfo(xid
, tcon
, buf
, fid
.netfid
, netpid
);
827 cinode
->cifsAttrs
= le32_to_cpu(buf
->Attributes
);
829 if (open_file
== NULL
)
830 CIFSSMBClose(xid
, tcon
, fid
.netfid
);
832 cifsFileInfo_put(open_file
);
835 cifs_put_tlink(tlink
);
840 cifs_set_compression(const unsigned int xid
, struct cifs_tcon
*tcon
,
841 struct cifsFileInfo
*cfile
)
843 return CIFSSMB_set_compression(xid
, tcon
, cfile
->fid
.netfid
);
847 cifs_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
848 const char *path
, struct cifs_sb_info
*cifs_sb
,
849 struct cifs_fid
*fid
, __u16 search_flags
,
850 struct cifs_search_info
*srch_inf
)
854 rc
= CIFSFindFirst(xid
, tcon
, path
, cifs_sb
,
855 &fid
->netfid
, search_flags
, srch_inf
, true);
857 cifs_dbg(FYI
, "find first failed=%d\n", rc
);
862 cifs_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
863 struct cifs_fid
*fid
, __u16 search_flags
,
864 struct cifs_search_info
*srch_inf
)
866 return CIFSFindNext(xid
, tcon
, fid
->netfid
, search_flags
, srch_inf
);
870 cifs_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
871 struct cifs_fid
*fid
)
873 return CIFSFindClose(xid
, tcon
, fid
->netfid
);
877 cifs_oplock_response(struct cifs_tcon
*tcon
, struct cifs_fid
*fid
,
878 struct cifsInodeInfo
*cinode
)
880 return CIFSSMBLock(0, tcon
, fid
->netfid
, current
->tgid
, 0, 0, 0, 0,
881 LOCKING_ANDX_OPLOCK_RELEASE
, false,
882 CIFS_CACHE_READ(cinode
) ? 1 : 0);
886 cifs_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
889 int rc
= -EOPNOTSUPP
;
891 buf
->f_type
= CIFS_MAGIC_NUMBER
;
894 * We could add a second check for a QFS Unix capability bit
896 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
897 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
898 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
901 * Only need to call the old QFSInfo if failed on newer one,
904 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
905 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
908 * Some old Windows servers also do not support level 103, retry with
909 * older level one if old server failed the previous call or we
910 * bypassed it because we detected that this was an older LANMAN sess
913 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
918 cifs_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
919 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
921 return CIFSSMBLock(xid
, tlink_tcon(cfile
->tlink
), cfile
->fid
.netfid
,
922 current
->tgid
, length
, offset
, unlock
, lock
,
923 (__u8
)type
, wait
, 0);
927 cifs_unix_dfs_readlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
928 const unsigned char *searchName
, char **symlinkinfo
,
929 const struct nls_table
*nls_codepage
)
931 #ifdef CONFIG_CIFS_DFS_UPCALL
933 unsigned int num_referrals
= 0;
934 struct dfs_info3_param
*referrals
= NULL
;
936 rc
= get_dfs_path(xid
, tcon
->ses
, searchName
, nls_codepage
,
937 &num_referrals
, &referrals
, 0);
939 if (!rc
&& num_referrals
> 0) {
940 *symlinkinfo
= kstrndup(referrals
->node_name
,
941 strlen(referrals
->node_name
),
945 free_dfs_info_array(referrals
, num_referrals
);
948 #else /* No DFS support */
954 cifs_query_symlink(const unsigned int xid
, struct cifs_tcon
*tcon
,
955 const char *full_path
, char **target_path
,
956 struct cifs_sb_info
*cifs_sb
)
961 struct cifs_open_parms oparms
;
963 cifs_dbg(FYI
, "%s: path: %s\n", __func__
, full_path
);
965 /* Check for unix extensions */
966 if (cap_unix(tcon
->ses
)) {
967 rc
= CIFSSMBUnixQuerySymLink(xid
, tcon
, full_path
, target_path
,
969 cifs_remap(cifs_sb
));
971 rc
= cifs_unix_dfs_readlink(xid
, tcon
, full_path
,
979 oparms
.cifs_sb
= cifs_sb
;
980 oparms
.desired_access
= FILE_READ_ATTRIBUTES
;
981 oparms
.create_options
= OPEN_REPARSE_POINT
;
982 oparms
.disposition
= FILE_OPEN
;
983 oparms
.path
= full_path
;
985 oparms
.reconnect
= false;
987 rc
= CIFS_open(xid
, &oparms
, &oplock
, NULL
);
991 rc
= CIFSSMBQuerySymLink(xid
, tcon
, fid
.netfid
, target_path
,
996 convert_delimiter(*target_path
, '/');
998 CIFSSMBClose(xid
, tcon
, fid
.netfid
);
1001 cifs_dbg(FYI
, "%s: target path: %s\n", __func__
, *target_path
);
1006 cifs_is_read_op(__u32 oplock
)
1008 return oplock
== OPLOCK_READ
;
1012 cifs_wp_retry_size(struct inode
*inode
)
1014 return CIFS_SB(inode
->i_sb
)->wsize
;
1018 cifs_dir_needs_close(struct cifsFileInfo
*cfile
)
1020 return !cfile
->srch_inf
.endOfSearch
&& !cfile
->invalidHandle
;
1024 cifs_can_echo(struct TCP_Server_Info
*server
)
1026 if (server
->tcpStatus
== CifsGood
)
1032 struct smb_version_operations smb1_operations
= {
1033 .send_cancel
= send_nt_cancel
,
1034 .compare_fids
= cifs_compare_fids
,
1035 .setup_request
= cifs_setup_request
,
1036 .setup_async_request
= cifs_setup_async_request
,
1037 .check_receive
= cifs_check_receive
,
1038 .add_credits
= cifs_add_credits
,
1039 .set_credits
= cifs_set_credits
,
1040 .get_credits_field
= cifs_get_credits_field
,
1041 .get_credits
= cifs_get_credits
,
1042 .wait_mtu_credits
= cifs_wait_mtu_credits
,
1043 .get_next_mid
= cifs_get_next_mid
,
1044 .read_data_offset
= cifs_read_data_offset
,
1045 .read_data_length
= cifs_read_data_length
,
1046 .map_error
= map_smb_to_linux_error
,
1047 .find_mid
= cifs_find_mid
,
1048 .check_message
= checkSMB
,
1049 .dump_detail
= cifs_dump_detail
,
1050 .clear_stats
= cifs_clear_stats
,
1051 .print_stats
= cifs_print_stats
,
1052 .is_oplock_break
= is_valid_oplock_break
,
1053 .downgrade_oplock
= cifs_downgrade_oplock
,
1054 .check_trans2
= cifs_check_trans2
,
1055 .need_neg
= cifs_need_neg
,
1056 .negotiate
= cifs_negotiate
,
1057 .negotiate_wsize
= cifs_negotiate_wsize
,
1058 .negotiate_rsize
= cifs_negotiate_rsize
,
1059 .sess_setup
= CIFS_SessSetup
,
1060 .logoff
= CIFSSMBLogoff
,
1061 .tree_connect
= CIFSTCon
,
1062 .tree_disconnect
= CIFSSMBTDis
,
1063 .get_dfs_refer
= CIFSGetDFSRefer
,
1064 .qfs_tcon
= cifs_qfs_tcon
,
1065 .is_path_accessible
= cifs_is_path_accessible
,
1066 .can_echo
= cifs_can_echo
,
1067 .query_path_info
= cifs_query_path_info
,
1068 .query_file_info
= cifs_query_file_info
,
1069 .get_srv_inum
= cifs_get_srv_inum
,
1070 .set_path_size
= CIFSSMBSetEOF
,
1071 .set_file_size
= CIFSSMBSetFileSize
,
1072 .set_file_info
= smb_set_file_info
,
1073 .set_compression
= cifs_set_compression
,
1074 .echo
= CIFSSMBEcho
,
1075 .mkdir
= CIFSSMBMkDir
,
1076 .mkdir_setinfo
= cifs_mkdir_setinfo
,
1077 .rmdir
= CIFSSMBRmDir
,
1078 .unlink
= CIFSSMBDelFile
,
1079 .rename_pending_delete
= cifs_rename_pending_delete
,
1080 .rename
= CIFSSMBRename
,
1081 .create_hardlink
= CIFSCreateHardLink
,
1082 .query_symlink
= cifs_query_symlink
,
1083 .open
= cifs_open_file
,
1084 .set_fid
= cifs_set_fid
,
1085 .close
= cifs_close_file
,
1086 .flush
= cifs_flush_file
,
1087 .async_readv
= cifs_async_readv
,
1088 .async_writev
= cifs_async_writev
,
1089 .sync_read
= cifs_sync_read
,
1090 .sync_write
= cifs_sync_write
,
1091 .query_dir_first
= cifs_query_dir_first
,
1092 .query_dir_next
= cifs_query_dir_next
,
1093 .close_dir
= cifs_close_dir
,
1094 .calc_smb_size
= smbCalcSize
,
1095 .oplock_response
= cifs_oplock_response
,
1096 .queryfs
= cifs_queryfs
,
1097 .mand_lock
= cifs_mand_lock
,
1098 .mand_unlock_range
= cifs_unlock_range
,
1099 .push_mand_locks
= cifs_push_mandatory_locks
,
1100 .query_mf_symlink
= cifs_query_mf_symlink
,
1101 .create_mf_symlink
= cifs_create_mf_symlink
,
1102 .is_read_op
= cifs_is_read_op
,
1103 .wp_retry_size
= cifs_wp_retry_size
,
1104 .dir_needs_close
= cifs_dir_needs_close
,
1105 #ifdef CONFIG_CIFS_XATTR
1106 .query_all_EAs
= CIFSSMBQAllEAs
,
1107 .set_EA
= CIFSSMBSetEA
,
1108 #endif /* CIFS_XATTR */
1109 #ifdef CONFIG_CIFS_ACL
1110 .get_acl
= get_cifs_acl
,
1111 .get_acl_by_fid
= get_cifs_acl_by_fid
,
1112 .set_acl
= set_cifs_acl
,
1113 #endif /* CIFS_ACL */
1116 struct smb_version_values smb1_values
= {
1117 .version_string
= SMB1_VERSION_STRING
,
1118 .large_lock_type
= LOCKING_ANDX_LARGE_FILES
,
1119 .exclusive_lock_type
= 0,
1120 .shared_lock_type
= LOCKING_ANDX_SHARED_LOCK
,
1121 .unlock_lock_type
= 0,
1122 .header_size
= sizeof(struct smb_hdr
),
1123 .max_header_size
= MAX_CIFS_HDR_SIZE
,
1124 .read_rsp_size
= sizeof(READ_RSP
),
1125 .lock_cmd
= cpu_to_le16(SMB_COM_LOCKING_ANDX
),
1126 .cap_unix
= CAP_UNIX
,
1127 .cap_nt_find
= CAP_NT_SMBS
| CAP_NT_FIND
,
1128 .cap_large_files
= CAP_LARGE_FILES
,
1129 .signing_enabled
= SECMODE_SIGN_ENABLED
,
1130 .signing_required
= SECMODE_SIGN_REQUIRED
,