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"
28 * An NT cancel request header looks just like the original request except:
30 * The Command is SMB_COM_NT_CANCEL
31 * The WordCount is zeroed out
32 * The ByteCount is zeroed out
34 * This function mangles an existing request buffer into a
35 * SMB_COM_NT_CANCEL request and then sends it.
38 send_nt_cancel(struct TCP_Server_Info
*server
, void *buf
,
39 struct mid_q_entry
*mid
)
42 struct smb_hdr
*in_buf
= (struct smb_hdr
*)buf
;
44 /* -4 for RFC1001 length and +2 for BCC field */
45 in_buf
->smb_buf_length
= cpu_to_be32(sizeof(struct smb_hdr
) - 4 + 2);
46 in_buf
->Command
= SMB_COM_NT_CANCEL
;
47 in_buf
->WordCount
= 0;
50 mutex_lock(&server
->srv_mutex
);
51 rc
= cifs_sign_smb(in_buf
, server
, &mid
->sequence_number
);
53 mutex_unlock(&server
->srv_mutex
);
58 * The response to this call was already factored into the sequence
59 * number when the call went out, so we must adjust it back downward
62 --server
->sequence_number
;
63 rc
= smb_send(server
, in_buf
, be32_to_cpu(in_buf
->smb_buf_length
));
65 server
->sequence_number
--;
67 mutex_unlock(&server
->srv_mutex
);
69 cifs_dbg(FYI
, "issued NT_CANCEL for mid %u, rc = %d\n",
76 cifs_compare_fids(struct cifsFileInfo
*ob1
, struct cifsFileInfo
*ob2
)
78 return ob1
->fid
.netfid
== ob2
->fid
.netfid
;
82 cifs_read_data_offset(char *buf
)
84 READ_RSP
*rsp
= (READ_RSP
*)buf
;
85 return le16_to_cpu(rsp
->DataOffset
);
89 cifs_read_data_length(char *buf
)
91 READ_RSP
*rsp
= (READ_RSP
*)buf
;
92 return (le16_to_cpu(rsp
->DataLengthHigh
) << 16) +
93 le16_to_cpu(rsp
->DataLength
);
96 static struct mid_q_entry
*
97 cifs_find_mid(struct TCP_Server_Info
*server
, char *buffer
)
99 struct smb_hdr
*buf
= (struct smb_hdr
*)buffer
;
100 struct mid_q_entry
*mid
;
102 spin_lock(&GlobalMid_Lock
);
103 list_for_each_entry(mid
, &server
->pending_mid_q
, qhead
) {
104 if (mid
->mid
== buf
->Mid
&&
105 mid
->mid_state
== MID_REQUEST_SUBMITTED
&&
106 le16_to_cpu(mid
->command
) == buf
->Command
) {
107 spin_unlock(&GlobalMid_Lock
);
111 spin_unlock(&GlobalMid_Lock
);
116 cifs_add_credits(struct TCP_Server_Info
*server
, const unsigned int add
,
119 spin_lock(&server
->req_lock
);
120 server
->credits
+= add
;
122 spin_unlock(&server
->req_lock
);
123 wake_up(&server
->request_q
);
127 cifs_set_credits(struct TCP_Server_Info
*server
, const int val
)
129 spin_lock(&server
->req_lock
);
130 server
->credits
= val
;
131 server
->oplocks
= val
> 1 ? enable_oplocks
: false;
132 spin_unlock(&server
->req_lock
);
136 cifs_get_credits_field(struct TCP_Server_Info
*server
, const int optype
)
138 return &server
->credits
;
142 cifs_get_credits(struct mid_q_entry
*mid
)
148 * Find a free multiplex id (SMB mid). Otherwise there could be
149 * mid collisions which might cause problems, demultiplexing the
150 * wrong response to this request. Multiplex ids could collide if
151 * one of a series requests takes much longer than the others, or
152 * if a very large number of long lived requests (byte range
153 * locks or FindNotify requests) are pending. No more than
154 * 64K-1 requests can be outstanding at one time. If no
155 * mids are available, return zero. A future optimization
156 * could make the combination of mids and uid the key we use
157 * to demultiplex on (rather than mid alone).
158 * In addition to the above check, the cifs demultiplex
159 * code already used the command code as a secondary
160 * check of the frame and if signing is negotiated the
161 * response would be discarded if the mid were the same
162 * but the signature was wrong. Since the mid is not put in the
163 * pending queue until later (when it is about to be dispatched)
164 * we do have to limit the number of outstanding requests
165 * to somewhat less than 64K-1 although it is hard to imagine
166 * so many threads being in the vfs at one time.
169 cifs_get_next_mid(struct TCP_Server_Info
*server
)
172 __u16 last_mid
, cur_mid
;
175 spin_lock(&GlobalMid_Lock
);
177 /* mid is 16 bit only for CIFS/SMB */
178 cur_mid
= (__u16
)((server
->CurrentMid
) & 0xffff);
179 /* we do not want to loop forever */
184 * This nested loop looks more expensive than it is.
185 * In practice the list of pending requests is short,
186 * fewer than 50, and the mids are likely to be unique
187 * on the first pass through the loop unless some request
188 * takes longer than the 64 thousand requests before it
189 * (and it would also have to have been a request that
192 while (cur_mid
!= last_mid
) {
193 struct mid_q_entry
*mid_entry
;
194 unsigned int num_mids
;
201 list_for_each_entry(mid_entry
, &server
->pending_mid_q
, qhead
) {
203 if (mid_entry
->mid
== cur_mid
&&
204 mid_entry
->mid_state
== MID_REQUEST_SUBMITTED
) {
205 /* This mid is in use, try a different one */
212 * if we have more than 32k mids in the list, then something
213 * is very wrong. Possibly a local user is trying to DoS the
214 * box by issuing long-running calls and SIGKILL'ing them. If
215 * we get to 2^16 mids then we're in big trouble as this
216 * function could loop forever.
218 * Go ahead and assign out the mid in this situation, but force
219 * an eventual reconnect to clean out the pending_mid_q.
221 if (num_mids
> 32768)
222 server
->tcpStatus
= CifsNeedReconnect
;
225 mid
= (__u64
)cur_mid
;
226 server
->CurrentMid
= mid
;
231 spin_unlock(&GlobalMid_Lock
);
237 0 not a transact2, or all data present
238 >0 transact2 with that much data missing
239 -EINVAL invalid transact2
242 check2ndT2(char *buf
)
244 struct smb_hdr
*pSMB
= (struct smb_hdr
*)buf
;
245 struct smb_t2_rsp
*pSMBt
;
247 __u16 total_data_size
, data_in_this_rsp
;
249 if (pSMB
->Command
!= SMB_COM_TRANSACTION2
)
252 /* check for plausible wct, bcc and t2 data and parm sizes */
253 /* check for parm and data offset going beyond end of smb */
254 if (pSMB
->WordCount
!= 10) { /* coalesce_t2 depends on this */
255 cifs_dbg(FYI
, "invalid transact2 word count\n");
259 pSMBt
= (struct smb_t2_rsp
*)pSMB
;
261 total_data_size
= get_unaligned_le16(&pSMBt
->t2_rsp
.TotalDataCount
);
262 data_in_this_rsp
= get_unaligned_le16(&pSMBt
->t2_rsp
.DataCount
);
264 if (total_data_size
== data_in_this_rsp
)
266 else if (total_data_size
< data_in_this_rsp
) {
267 cifs_dbg(FYI
, "total data %d smaller than data in frame %d\n",
268 total_data_size
, data_in_this_rsp
);
272 remaining
= total_data_size
- data_in_this_rsp
;
274 cifs_dbg(FYI
, "missing %d bytes from transact2, check next response\n",
276 if (total_data_size
> CIFSMaxBufSize
) {
277 cifs_dbg(VFS
, "TotalDataSize %d is over maximum buffer %d\n",
278 total_data_size
, CIFSMaxBufSize
);
285 coalesce_t2(char *second_buf
, struct smb_hdr
*target_hdr
)
287 struct smb_t2_rsp
*pSMBs
= (struct smb_t2_rsp
*)second_buf
;
288 struct smb_t2_rsp
*pSMBt
= (struct smb_t2_rsp
*)target_hdr
;
289 char *data_area_of_tgt
;
290 char *data_area_of_src
;
292 unsigned int byte_count
, total_in_tgt
;
293 __u16 tgt_total_cnt
, src_total_cnt
, total_in_src
;
295 src_total_cnt
= get_unaligned_le16(&pSMBs
->t2_rsp
.TotalDataCount
);
296 tgt_total_cnt
= get_unaligned_le16(&pSMBt
->t2_rsp
.TotalDataCount
);
298 if (tgt_total_cnt
!= src_total_cnt
)
299 cifs_dbg(FYI
, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
300 src_total_cnt
, tgt_total_cnt
);
302 total_in_tgt
= get_unaligned_le16(&pSMBt
->t2_rsp
.DataCount
);
304 remaining
= tgt_total_cnt
- total_in_tgt
;
307 cifs_dbg(FYI
, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n",
308 tgt_total_cnt
, total_in_tgt
);
312 if (remaining
== 0) {
313 /* nothing to do, ignore */
314 cifs_dbg(FYI
, "no more data remains\n");
318 total_in_src
= get_unaligned_le16(&pSMBs
->t2_rsp
.DataCount
);
319 if (remaining
< total_in_src
)
320 cifs_dbg(FYI
, "transact2 2nd response contains too much data\n");
322 /* find end of first SMB data area */
323 data_area_of_tgt
= (char *)&pSMBt
->hdr
.Protocol
+
324 get_unaligned_le16(&pSMBt
->t2_rsp
.DataOffset
);
326 /* validate target area */
327 data_area_of_src
= (char *)&pSMBs
->hdr
.Protocol
+
328 get_unaligned_le16(&pSMBs
->t2_rsp
.DataOffset
);
330 data_area_of_tgt
+= total_in_tgt
;
332 total_in_tgt
+= total_in_src
;
333 /* is the result too big for the field? */
334 if (total_in_tgt
> USHRT_MAX
) {
335 cifs_dbg(FYI
, "coalesced DataCount too large (%u)\n",
339 put_unaligned_le16(total_in_tgt
, &pSMBt
->t2_rsp
.DataCount
);
342 byte_count
= get_bcc(target_hdr
);
343 byte_count
+= total_in_src
;
344 /* is the result too big for the field? */
345 if (byte_count
> USHRT_MAX
) {
346 cifs_dbg(FYI
, "coalesced BCC too large (%u)\n", byte_count
);
349 put_bcc(byte_count
, target_hdr
);
351 byte_count
= be32_to_cpu(target_hdr
->smb_buf_length
);
352 byte_count
+= total_in_src
;
353 /* don't allow buffer to overflow */
354 if (byte_count
> CIFSMaxBufSize
+ MAX_CIFS_HDR_SIZE
- 4) {
355 cifs_dbg(FYI
, "coalesced BCC exceeds buffer size (%u)\n",
359 target_hdr
->smb_buf_length
= cpu_to_be32(byte_count
);
361 /* copy second buffer into end of first buffer */
362 memcpy(data_area_of_tgt
, data_area_of_src
, total_in_src
);
364 if (remaining
!= total_in_src
) {
365 /* more responses to go */
366 cifs_dbg(FYI
, "waiting for more secondary responses\n");
371 cifs_dbg(FYI
, "found the last secondary response\n");
376 cifs_check_trans2(struct mid_q_entry
*mid
, struct TCP_Server_Info
*server
,
377 char *buf
, int malformed
)
381 if (check2ndT2(buf
) <= 0)
383 mid
->multiRsp
= true;
385 /* merge response - fix up 1st*/
386 malformed
= coalesce_t2(buf
, mid
->resp_buf
);
389 /* All parts received or packet is malformed. */
390 mid
->multiEnd
= true;
391 dequeue_mid(mid
, malformed
);
394 if (!server
->large_buf
) {
395 /*FIXME: switch to already allocated largebuf?*/
396 cifs_dbg(VFS
, "1st trans2 resp needs bigbuf\n");
398 /* Have first buffer */
400 mid
->large_buf
= true;
401 server
->bigbuf
= NULL
;
407 cifs_need_neg(struct TCP_Server_Info
*server
)
409 return server
->maxBuf
== 0;
413 cifs_negotiate(const unsigned int xid
, struct cifs_ses
*ses
)
416 rc
= CIFSSMBNegotiate(xid
, ses
);
418 /* retry only once on 1st time connection */
419 set_credits(ses
->server
, 1);
420 rc
= CIFSSMBNegotiate(xid
, ses
);
428 cifs_negotiate_wsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
430 __u64 unix_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
431 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
434 /* start with specified wsize, or default */
435 if (volume_info
->wsize
)
436 wsize
= volume_info
->wsize
;
437 else if (tcon
->unix_ext
&& (unix_cap
& CIFS_UNIX_LARGE_WRITE_CAP
))
438 wsize
= CIFS_DEFAULT_IOSIZE
;
440 wsize
= CIFS_DEFAULT_NON_POSIX_WSIZE
;
442 /* can server support 24-bit write sizes? (via UNIX extensions) */
443 if (!tcon
->unix_ext
|| !(unix_cap
& CIFS_UNIX_LARGE_WRITE_CAP
))
444 wsize
= min_t(unsigned int, wsize
, CIFS_MAX_RFC1002_WSIZE
);
447 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
448 * Limit it to max buffer offered by the server, minus the size of the
449 * WRITEX header, not including the 4 byte RFC1001 length.
451 if (!(server
->capabilities
& CAP_LARGE_WRITE_X
) ||
452 (!(server
->capabilities
& CAP_UNIX
) && server
->sign
))
453 wsize
= min_t(unsigned int, wsize
,
454 server
->maxBuf
- sizeof(WRITE_REQ
) + 4);
456 /* hard limit of CIFS_MAX_WSIZE */
457 wsize
= min_t(unsigned int, wsize
, CIFS_MAX_WSIZE
);
463 cifs_negotiate_rsize(struct cifs_tcon
*tcon
, struct smb_vol
*volume_info
)
465 __u64 unix_cap
= le64_to_cpu(tcon
->fsUnixInfo
.Capability
);
466 struct TCP_Server_Info
*server
= tcon
->ses
->server
;
467 unsigned int rsize
, defsize
;
470 * Set default value...
472 * HACK alert! Ancient servers have very small buffers. Even though
473 * MS-CIFS indicates that servers are only limited by the client's
474 * bufsize for reads, testing against win98se shows that it throws
475 * INVALID_PARAMETER errors if you try to request too large a read.
476 * OS/2 just sends back short reads.
478 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
479 * it can't handle a read request larger than its MaxBufferSize either.
481 if (tcon
->unix_ext
&& (unix_cap
& CIFS_UNIX_LARGE_READ_CAP
))
482 defsize
= CIFS_DEFAULT_IOSIZE
;
483 else if (server
->capabilities
& CAP_LARGE_READ_X
)
484 defsize
= CIFS_DEFAULT_NON_POSIX_RSIZE
;
486 defsize
= server
->maxBuf
- sizeof(READ_RSP
);
488 rsize
= volume_info
->rsize
? volume_info
->rsize
: defsize
;
491 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
492 * the client's MaxBufferSize.
494 if (!(server
->capabilities
& CAP_LARGE_READ_X
))
495 rsize
= min_t(unsigned int, CIFSMaxBufSize
, rsize
);
497 /* hard limit of CIFS_MAX_RSIZE */
498 rsize
= min_t(unsigned int, rsize
, CIFS_MAX_RSIZE
);
504 cifs_qfs_tcon(const unsigned int xid
, struct cifs_tcon
*tcon
)
506 CIFSSMBQFSDeviceInfo(xid
, tcon
);
507 CIFSSMBQFSAttributeInfo(xid
, tcon
);
511 cifs_is_path_accessible(const unsigned int xid
, struct cifs_tcon
*tcon
,
512 struct cifs_sb_info
*cifs_sb
, const char *full_path
)
515 FILE_ALL_INFO
*file_info
;
517 file_info
= kmalloc(sizeof(FILE_ALL_INFO
), GFP_KERNEL
);
518 if (file_info
== NULL
)
521 rc
= CIFSSMBQPathInfo(xid
, tcon
, full_path
, file_info
,
522 0 /* not legacy */, cifs_sb
->local_nls
,
523 cifs_sb
->mnt_cifs_flags
&
524 CIFS_MOUNT_MAP_SPECIAL_CHR
);
526 if (rc
== -EOPNOTSUPP
|| rc
== -EINVAL
)
527 rc
= SMBQueryInformation(xid
, tcon
, full_path
, file_info
,
528 cifs_sb
->local_nls
, cifs_sb
->mnt_cifs_flags
&
529 CIFS_MOUNT_MAP_SPECIAL_CHR
);
535 cifs_query_path_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
536 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
537 FILE_ALL_INFO
*data
, bool *adjustTZ
)
541 /* could do find first instead but this returns more info */
542 rc
= CIFSSMBQPathInfo(xid
, tcon
, full_path
, data
, 0 /* not legacy */,
543 cifs_sb
->local_nls
, cifs_sb
->mnt_cifs_flags
&
544 CIFS_MOUNT_MAP_SPECIAL_CHR
);
546 * BB optimize code so we do not make the above call when server claims
547 * no NT SMB support and the above call failed at least once - set flag
550 if ((rc
== -EOPNOTSUPP
) || (rc
== -EINVAL
)) {
551 rc
= SMBQueryInformation(xid
, tcon
, full_path
, data
,
553 cifs_sb
->mnt_cifs_flags
&
554 CIFS_MOUNT_MAP_SPECIAL_CHR
);
561 cifs_get_srv_inum(const unsigned int xid
, struct cifs_tcon
*tcon
,
562 struct cifs_sb_info
*cifs_sb
, const char *full_path
,
563 u64
*uniqueid
, FILE_ALL_INFO
*data
)
566 * We can not use the IndexNumber field by default from Windows or
567 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
568 * CIFS spec claims that this value is unique within the scope of a
569 * share, and the windows docs hint that it's actually unique
572 * There may be higher info levels that work but are there Windows
573 * server or network appliances for which IndexNumber field is not
576 return CIFSGetSrvInodeNumber(xid
, tcon
, full_path
, uniqueid
,
578 cifs_sb
->mnt_cifs_flags
&
579 CIFS_MOUNT_MAP_SPECIAL_CHR
);
583 cifs_query_file_info(const unsigned int xid
, struct cifs_tcon
*tcon
,
584 struct cifs_fid
*fid
, FILE_ALL_INFO
*data
)
586 return CIFSSMBQFileInfo(xid
, tcon
, fid
->netfid
, data
);
590 cifs_clear_stats(struct cifs_tcon
*tcon
)
592 #ifdef CONFIG_CIFS_STATS
593 atomic_set(&tcon
->stats
.cifs_stats
.num_writes
, 0);
594 atomic_set(&tcon
->stats
.cifs_stats
.num_reads
, 0);
595 atomic_set(&tcon
->stats
.cifs_stats
.num_flushes
, 0);
596 atomic_set(&tcon
->stats
.cifs_stats
.num_oplock_brks
, 0);
597 atomic_set(&tcon
->stats
.cifs_stats
.num_opens
, 0);
598 atomic_set(&tcon
->stats
.cifs_stats
.num_posixopens
, 0);
599 atomic_set(&tcon
->stats
.cifs_stats
.num_posixmkdirs
, 0);
600 atomic_set(&tcon
->stats
.cifs_stats
.num_closes
, 0);
601 atomic_set(&tcon
->stats
.cifs_stats
.num_deletes
, 0);
602 atomic_set(&tcon
->stats
.cifs_stats
.num_mkdirs
, 0);
603 atomic_set(&tcon
->stats
.cifs_stats
.num_rmdirs
, 0);
604 atomic_set(&tcon
->stats
.cifs_stats
.num_renames
, 0);
605 atomic_set(&tcon
->stats
.cifs_stats
.num_t2renames
, 0);
606 atomic_set(&tcon
->stats
.cifs_stats
.num_ffirst
, 0);
607 atomic_set(&tcon
->stats
.cifs_stats
.num_fnext
, 0);
608 atomic_set(&tcon
->stats
.cifs_stats
.num_fclose
, 0);
609 atomic_set(&tcon
->stats
.cifs_stats
.num_hardlinks
, 0);
610 atomic_set(&tcon
->stats
.cifs_stats
.num_symlinks
, 0);
611 atomic_set(&tcon
->stats
.cifs_stats
.num_locks
, 0);
612 atomic_set(&tcon
->stats
.cifs_stats
.num_acl_get
, 0);
613 atomic_set(&tcon
->stats
.cifs_stats
.num_acl_set
, 0);
618 cifs_print_stats(struct seq_file
*m
, struct cifs_tcon
*tcon
)
620 #ifdef CONFIG_CIFS_STATS
621 seq_printf(m
, " Oplocks breaks: %d",
622 atomic_read(&tcon
->stats
.cifs_stats
.num_oplock_brks
));
623 seq_printf(m
, "\nReads: %d Bytes: %llu",
624 atomic_read(&tcon
->stats
.cifs_stats
.num_reads
),
625 (long long)(tcon
->bytes_read
));
626 seq_printf(m
, "\nWrites: %d Bytes: %llu",
627 atomic_read(&tcon
->stats
.cifs_stats
.num_writes
),
628 (long long)(tcon
->bytes_written
));
629 seq_printf(m
, "\nFlushes: %d",
630 atomic_read(&tcon
->stats
.cifs_stats
.num_flushes
));
631 seq_printf(m
, "\nLocks: %d HardLinks: %d Symlinks: %d",
632 atomic_read(&tcon
->stats
.cifs_stats
.num_locks
),
633 atomic_read(&tcon
->stats
.cifs_stats
.num_hardlinks
),
634 atomic_read(&tcon
->stats
.cifs_stats
.num_symlinks
));
635 seq_printf(m
, "\nOpens: %d Closes: %d Deletes: %d",
636 atomic_read(&tcon
->stats
.cifs_stats
.num_opens
),
637 atomic_read(&tcon
->stats
.cifs_stats
.num_closes
),
638 atomic_read(&tcon
->stats
.cifs_stats
.num_deletes
));
639 seq_printf(m
, "\nPosix Opens: %d Posix Mkdirs: %d",
640 atomic_read(&tcon
->stats
.cifs_stats
.num_posixopens
),
641 atomic_read(&tcon
->stats
.cifs_stats
.num_posixmkdirs
));
642 seq_printf(m
, "\nMkdirs: %d Rmdirs: %d",
643 atomic_read(&tcon
->stats
.cifs_stats
.num_mkdirs
),
644 atomic_read(&tcon
->stats
.cifs_stats
.num_rmdirs
));
645 seq_printf(m
, "\nRenames: %d T2 Renames %d",
646 atomic_read(&tcon
->stats
.cifs_stats
.num_renames
),
647 atomic_read(&tcon
->stats
.cifs_stats
.num_t2renames
));
648 seq_printf(m
, "\nFindFirst: %d FNext %d FClose %d",
649 atomic_read(&tcon
->stats
.cifs_stats
.num_ffirst
),
650 atomic_read(&tcon
->stats
.cifs_stats
.num_fnext
),
651 atomic_read(&tcon
->stats
.cifs_stats
.num_fclose
));
656 cifs_mkdir_setinfo(struct inode
*inode
, const char *full_path
,
657 struct cifs_sb_info
*cifs_sb
, struct cifs_tcon
*tcon
,
658 const unsigned int xid
)
660 FILE_BASIC_INFO info
;
661 struct cifsInodeInfo
*cifsInode
;
665 memset(&info
, 0, sizeof(info
));
666 cifsInode
= CIFS_I(inode
);
667 dosattrs
= cifsInode
->cifsAttrs
|ATTR_READONLY
;
668 info
.Attributes
= cpu_to_le32(dosattrs
);
669 rc
= CIFSSMBSetPathInfo(xid
, tcon
, full_path
, &info
, cifs_sb
->local_nls
,
670 cifs_sb
->mnt_cifs_flags
&
671 CIFS_MOUNT_MAP_SPECIAL_CHR
);
673 cifsInode
->cifsAttrs
= dosattrs
;
677 cifs_open_file(const unsigned int xid
, struct cifs_open_parms
*oparms
,
678 __u32
*oplock
, FILE_ALL_INFO
*buf
)
680 if (!(oparms
->tcon
->ses
->capabilities
& CAP_NT_SMBS
))
681 return SMBLegacyOpen(xid
, oparms
->tcon
, oparms
->path
,
683 oparms
->desired_access
,
684 oparms
->create_options
,
685 &oparms
->fid
->netfid
, oplock
, buf
,
686 oparms
->cifs_sb
->local_nls
,
687 oparms
->cifs_sb
->mnt_cifs_flags
688 & CIFS_MOUNT_MAP_SPECIAL_CHR
);
689 return CIFSSMBOpen(xid
, oparms
->tcon
, oparms
->path
,
690 oparms
->disposition
, oparms
->desired_access
,
691 oparms
->create_options
, &oparms
->fid
->netfid
, oplock
,
692 buf
, oparms
->cifs_sb
->local_nls
,
693 oparms
->cifs_sb
->mnt_cifs_flags
&
694 CIFS_MOUNT_MAP_SPECIAL_CHR
);
698 cifs_set_fid(struct cifsFileInfo
*cfile
, struct cifs_fid
*fid
, __u32 oplock
)
700 struct cifsInodeInfo
*cinode
= CIFS_I(cfile
->dentry
->d_inode
);
701 cfile
->fid
.netfid
= fid
->netfid
;
702 cifs_set_oplock_level(cinode
, oplock
);
703 cinode
->can_cache_brlcks
= cinode
->clientCanCacheAll
;
707 cifs_close_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
708 struct cifs_fid
*fid
)
710 CIFSSMBClose(xid
, tcon
, fid
->netfid
);
714 cifs_flush_file(const unsigned int xid
, struct cifs_tcon
*tcon
,
715 struct cifs_fid
*fid
)
717 return CIFSSMBFlush(xid
, tcon
, fid
->netfid
);
721 cifs_sync_read(const unsigned int xid
, struct cifsFileInfo
*cfile
,
722 struct cifs_io_parms
*parms
, unsigned int *bytes_read
,
723 char **buf
, int *buf_type
)
725 parms
->netfid
= cfile
->fid
.netfid
;
726 return CIFSSMBRead(xid
, parms
, bytes_read
, buf
, buf_type
);
730 cifs_sync_write(const unsigned int xid
, struct cifsFileInfo
*cfile
,
731 struct cifs_io_parms
*parms
, unsigned int *written
,
732 struct kvec
*iov
, unsigned long nr_segs
)
735 parms
->netfid
= cfile
->fid
.netfid
;
736 return CIFSSMBWrite2(xid
, parms
, written
, iov
, nr_segs
);
740 smb_set_file_info(struct inode
*inode
, const char *full_path
,
741 FILE_BASIC_INFO
*buf
, const unsigned int xid
)
747 struct cifsFileInfo
*open_file
;
748 struct cifsInodeInfo
*cinode
= CIFS_I(inode
);
749 struct cifs_sb_info
*cifs_sb
= CIFS_SB(inode
->i_sb
);
750 struct tcon_link
*tlink
= NULL
;
751 struct cifs_tcon
*tcon
;
753 /* if the file is already open for write, just use that fileid */
754 open_file
= find_writable_file(cinode
, true);
756 netfid
= open_file
->fid
.netfid
;
757 netpid
= open_file
->pid
;
758 tcon
= tlink_tcon(open_file
->tlink
);
759 goto set_via_filehandle
;
762 tlink
= cifs_sb_tlink(cifs_sb
);
768 tcon
= tlink_tcon(tlink
);
770 rc
= CIFSSMBSetPathInfo(xid
, tcon
, full_path
, buf
, cifs_sb
->local_nls
,
771 cifs_sb
->mnt_cifs_flags
&
772 CIFS_MOUNT_MAP_SPECIAL_CHR
);
774 cinode
->cifsAttrs
= le32_to_cpu(buf
->Attributes
);
776 } else if (rc
!= -EOPNOTSUPP
&& rc
!= -EINVAL
) {
780 cifs_dbg(FYI
, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
781 rc
= CIFSSMBOpen(xid
, tcon
, full_path
, FILE_OPEN
,
782 SYNCHRONIZE
| FILE_WRITE_ATTRIBUTES
, CREATE_NOT_DIR
,
783 &netfid
, &oplock
, NULL
, cifs_sb
->local_nls
,
784 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
);
792 netpid
= current
->tgid
;
795 rc
= CIFSSMBSetFileInfo(xid
, tcon
, buf
, netfid
, netpid
);
797 cinode
->cifsAttrs
= le32_to_cpu(buf
->Attributes
);
799 if (open_file
== NULL
)
800 CIFSSMBClose(xid
, tcon
, netfid
);
802 cifsFileInfo_put(open_file
);
805 cifs_put_tlink(tlink
);
810 cifs_query_dir_first(const unsigned int xid
, struct cifs_tcon
*tcon
,
811 const char *path
, struct cifs_sb_info
*cifs_sb
,
812 struct cifs_fid
*fid
, __u16 search_flags
,
813 struct cifs_search_info
*srch_inf
)
815 return CIFSFindFirst(xid
, tcon
, path
, cifs_sb
,
816 &fid
->netfid
, search_flags
, srch_inf
, true);
820 cifs_query_dir_next(const unsigned int xid
, struct cifs_tcon
*tcon
,
821 struct cifs_fid
*fid
, __u16 search_flags
,
822 struct cifs_search_info
*srch_inf
)
824 return CIFSFindNext(xid
, tcon
, fid
->netfid
, search_flags
, srch_inf
);
828 cifs_close_dir(const unsigned int xid
, struct cifs_tcon
*tcon
,
829 struct cifs_fid
*fid
)
831 return CIFSFindClose(xid
, tcon
, fid
->netfid
);
835 cifs_oplock_response(struct cifs_tcon
*tcon
, struct cifs_fid
*fid
,
836 struct cifsInodeInfo
*cinode
)
838 return CIFSSMBLock(0, tcon
, fid
->netfid
, current
->tgid
, 0, 0, 0, 0,
839 LOCKING_ANDX_OPLOCK_RELEASE
, false,
840 cinode
->clientCanCacheRead
? 1 : 0);
844 cifs_queryfs(const unsigned int xid
, struct cifs_tcon
*tcon
,
847 int rc
= -EOPNOTSUPP
;
849 buf
->f_type
= CIFS_MAGIC_NUMBER
;
852 * We could add a second check for a QFS Unix capability bit
854 if ((tcon
->ses
->capabilities
& CAP_UNIX
) &&
855 (CIFS_POSIX_EXTENSIONS
& le64_to_cpu(tcon
->fsUnixInfo
.Capability
)))
856 rc
= CIFSSMBQFSPosixInfo(xid
, tcon
, buf
);
859 * Only need to call the old QFSInfo if failed on newer one,
862 if (rc
&& (tcon
->ses
->capabilities
& CAP_NT_SMBS
))
863 rc
= CIFSSMBQFSInfo(xid
, tcon
, buf
);
866 * Some old Windows servers also do not support level 103, retry with
867 * older level one if old server failed the previous call or we
868 * bypassed it because we detected that this was an older LANMAN sess
871 rc
= SMBOldQFSInfo(xid
, tcon
, buf
);
876 cifs_mand_lock(const unsigned int xid
, struct cifsFileInfo
*cfile
, __u64 offset
,
877 __u64 length
, __u32 type
, int lock
, int unlock
, bool wait
)
879 return CIFSSMBLock(xid
, tlink_tcon(cfile
->tlink
), cfile
->fid
.netfid
,
880 current
->tgid
, length
, offset
, unlock
, lock
,
881 (__u8
)type
, wait
, 0);
884 struct smb_version_operations smb1_operations
= {
885 .send_cancel
= send_nt_cancel
,
886 .compare_fids
= cifs_compare_fids
,
887 .setup_request
= cifs_setup_request
,
888 .setup_async_request
= cifs_setup_async_request
,
889 .check_receive
= cifs_check_receive
,
890 .add_credits
= cifs_add_credits
,
891 .set_credits
= cifs_set_credits
,
892 .get_credits_field
= cifs_get_credits_field
,
893 .get_credits
= cifs_get_credits
,
894 .get_next_mid
= cifs_get_next_mid
,
895 .read_data_offset
= cifs_read_data_offset
,
896 .read_data_length
= cifs_read_data_length
,
897 .map_error
= map_smb_to_linux_error
,
898 .find_mid
= cifs_find_mid
,
899 .check_message
= checkSMB
,
900 .dump_detail
= cifs_dump_detail
,
901 .clear_stats
= cifs_clear_stats
,
902 .print_stats
= cifs_print_stats
,
903 .is_oplock_break
= is_valid_oplock_break
,
904 .check_trans2
= cifs_check_trans2
,
905 .need_neg
= cifs_need_neg
,
906 .negotiate
= cifs_negotiate
,
907 .negotiate_wsize
= cifs_negotiate_wsize
,
908 .negotiate_rsize
= cifs_negotiate_rsize
,
909 .sess_setup
= CIFS_SessSetup
,
910 .logoff
= CIFSSMBLogoff
,
911 .tree_connect
= CIFSTCon
,
912 .tree_disconnect
= CIFSSMBTDis
,
913 .get_dfs_refer
= CIFSGetDFSRefer
,
914 .qfs_tcon
= cifs_qfs_tcon
,
915 .is_path_accessible
= cifs_is_path_accessible
,
916 .query_path_info
= cifs_query_path_info
,
917 .query_file_info
= cifs_query_file_info
,
918 .get_srv_inum
= cifs_get_srv_inum
,
919 .set_path_size
= CIFSSMBSetEOF
,
920 .set_file_size
= CIFSSMBSetFileSize
,
921 .set_file_info
= smb_set_file_info
,
923 .mkdir
= CIFSSMBMkDir
,
924 .mkdir_setinfo
= cifs_mkdir_setinfo
,
925 .rmdir
= CIFSSMBRmDir
,
926 .unlink
= CIFSSMBDelFile
,
927 .rename_pending_delete
= cifs_rename_pending_delete
,
928 .rename
= CIFSSMBRename
,
929 .create_hardlink
= CIFSCreateHardLink
,
930 .open
= cifs_open_file
,
931 .set_fid
= cifs_set_fid
,
932 .close
= cifs_close_file
,
933 .flush
= cifs_flush_file
,
934 .async_readv
= cifs_async_readv
,
935 .async_writev
= cifs_async_writev
,
936 .sync_read
= cifs_sync_read
,
937 .sync_write
= cifs_sync_write
,
938 .query_dir_first
= cifs_query_dir_first
,
939 .query_dir_next
= cifs_query_dir_next
,
940 .close_dir
= cifs_close_dir
,
941 .calc_smb_size
= smbCalcSize
,
942 .oplock_response
= cifs_oplock_response
,
943 .queryfs
= cifs_queryfs
,
944 .mand_lock
= cifs_mand_lock
,
945 .mand_unlock_range
= cifs_unlock_range
,
946 .push_mand_locks
= cifs_push_mandatory_locks
,
947 .query_mf_symlink
= open_query_close_cifs_symlink
,
950 struct smb_version_values smb1_values
= {
951 .version_string
= SMB1_VERSION_STRING
,
952 .large_lock_type
= LOCKING_ANDX_LARGE_FILES
,
953 .exclusive_lock_type
= 0,
954 .shared_lock_type
= LOCKING_ANDX_SHARED_LOCK
,
955 .unlock_lock_type
= 0,
956 .header_size
= sizeof(struct smb_hdr
),
957 .max_header_size
= MAX_CIFS_HDR_SIZE
,
958 .read_rsp_size
= sizeof(READ_RSP
),
959 .lock_cmd
= cpu_to_le16(SMB_COM_LOCKING_ANDX
),
960 .cap_unix
= CAP_UNIX
,
961 .cap_nt_find
= CAP_NT_SMBS
| CAP_NT_FIND
,
962 .cap_large_files
= CAP_LARGE_FILES
,
963 .oplock_read
= OPLOCK_READ
,
964 .signing_enabled
= SECMODE_SIGN_ENABLED
,
965 .signing_required
= SECMODE_SIGN_REQUIRED
,