blob: 47bc5a87f94e9fd841b9c7bc391462f81ca872c9 [file] [log] [blame]
Jeff Layton23db65f2012-05-15 12:20:51 -04001/*
2 * SMB1 (CIFS) version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
Pavel Shilovsky24985c52012-09-18 16:20:28 -070020#include <linux/pagemap.h>
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -070021#include <linux/vfs.h>
Jeff Layton23db65f2012-05-15 12:20:51 -040022#include "cifsglob.h"
Jeff Layton121b0462012-05-15 12:21:10 -040023#include "cifsproto.h"
24#include "cifs_debug.h"
Pavel Shilovsky106dc532012-02-28 14:23:34 +030025#include "cifspdu.h"
Jeff Layton121b0462012-05-15 12:21:10 -040026
27/*
28 * An NT cancel request header looks just like the original request except:
29 *
30 * The Command is SMB_COM_NT_CANCEL
31 * The WordCount is zeroed out
32 * The ByteCount is zeroed out
33 *
34 * This function mangles an existing request buffer into a
35 * SMB_COM_NT_CANCEL request and then sends it.
36 */
37static int
38send_nt_cancel(struct TCP_Server_Info *server, void *buf,
39 struct mid_q_entry *mid)
40{
41 int rc = 0;
42 struct smb_hdr *in_buf = (struct smb_hdr *)buf;
43
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;
48 put_bcc(0, in_buf);
49
50 mutex_lock(&server->srv_mutex);
51 rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
52 if (rc) {
53 mutex_unlock(&server->srv_mutex);
54 return rc;
55 }
Jeff Layton31efee62012-12-27 08:05:03 -050056
57 /*
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
60 * after signing here.
61 */
62 --server->sequence_number;
Jeff Layton121b0462012-05-15 12:21:10 -040063 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
64 mutex_unlock(&server->srv_mutex);
65
66 cFYI(1, "issued NT_CANCEL for mid %u, rc = %d",
67 in_buf->Mid, rc);
68
69 return rc;
70}
Jeff Layton23db65f2012-05-15 12:20:51 -040071
Pavel Shilovsky55157df2012-02-28 14:04:17 +030072static bool
73cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
74{
Pavel Shilovsky4b4de762012-09-18 16:20:26 -070075 return ob1->fid.netfid == ob2->fid.netfid;
Pavel Shilovsky55157df2012-02-28 14:04:17 +030076}
77
Pavel Shilovskyeb378712012-05-17 13:02:51 +040078static unsigned int
79cifs_read_data_offset(char *buf)
80{
81 READ_RSP *rsp = (READ_RSP *)buf;
82 return le16_to_cpu(rsp->DataOffset);
83}
84
85static unsigned int
86cifs_read_data_length(char *buf)
87{
88 READ_RSP *rsp = (READ_RSP *)buf;
89 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
90 le16_to_cpu(rsp->DataLength);
91}
92
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +040093static struct mid_q_entry *
94cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
95{
96 struct smb_hdr *buf = (struct smb_hdr *)buffer;
97 struct mid_q_entry *mid;
98
99 spin_lock(&GlobalMid_Lock);
100 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
101 if (mid->mid == buf->Mid &&
102 mid->mid_state == MID_REQUEST_SUBMITTED &&
103 le16_to_cpu(mid->command) == buf->Command) {
104 spin_unlock(&GlobalMid_Lock);
105 return mid;
106 }
107 }
108 spin_unlock(&GlobalMid_Lock);
109 return NULL;
110}
111
Pavel Shilovsky45275782012-05-17 17:53:29 +0400112static void
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400113cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add,
114 const int optype)
Pavel Shilovsky45275782012-05-17 17:53:29 +0400115{
116 spin_lock(&server->req_lock);
117 server->credits += add;
118 server->in_flight--;
119 spin_unlock(&server->req_lock);
120 wake_up(&server->request_q);
121}
122
123static void
124cifs_set_credits(struct TCP_Server_Info *server, const int val)
125{
126 spin_lock(&server->req_lock);
127 server->credits = val;
128 server->oplocks = val > 1 ? enable_oplocks : false;
129 spin_unlock(&server->req_lock);
130}
131
132static int *
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400133cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
Pavel Shilovsky45275782012-05-17 17:53:29 +0400134{
135 return &server->credits;
136}
137
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400138static unsigned int
139cifs_get_credits(struct mid_q_entry *mid)
140{
141 return 1;
142}
143
Pavel Shilovsky88257362012-05-23 14:01:59 +0400144/*
145 * Find a free multiplex id (SMB mid). Otherwise there could be
146 * mid collisions which might cause problems, demultiplexing the
147 * wrong response to this request. Multiplex ids could collide if
148 * one of a series requests takes much longer than the others, or
149 * if a very large number of long lived requests (byte range
150 * locks or FindNotify requests) are pending. No more than
151 * 64K-1 requests can be outstanding at one time. If no
152 * mids are available, return zero. A future optimization
153 * could make the combination of mids and uid the key we use
154 * to demultiplex on (rather than mid alone).
155 * In addition to the above check, the cifs demultiplex
156 * code already used the command code as a secondary
157 * check of the frame and if signing is negotiated the
158 * response would be discarded if the mid were the same
159 * but the signature was wrong. Since the mid is not put in the
160 * pending queue until later (when it is about to be dispatched)
161 * we do have to limit the number of outstanding requests
162 * to somewhat less than 64K-1 although it is hard to imagine
163 * so many threads being in the vfs at one time.
164 */
165static __u64
166cifs_get_next_mid(struct TCP_Server_Info *server)
167{
168 __u64 mid = 0;
169 __u16 last_mid, cur_mid;
170 bool collision;
171
172 spin_lock(&GlobalMid_Lock);
173
174 /* mid is 16 bit only for CIFS/SMB */
175 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
176 /* we do not want to loop forever */
177 last_mid = cur_mid;
178 cur_mid++;
179
180 /*
181 * This nested loop looks more expensive than it is.
182 * In practice the list of pending requests is short,
183 * fewer than 50, and the mids are likely to be unique
184 * on the first pass through the loop unless some request
185 * takes longer than the 64 thousand requests before it
186 * (and it would also have to have been a request that
187 * did not time out).
188 */
189 while (cur_mid != last_mid) {
190 struct mid_q_entry *mid_entry;
191 unsigned int num_mids;
192
193 collision = false;
194 if (cur_mid == 0)
195 cur_mid++;
196
197 num_mids = 0;
198 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
199 ++num_mids;
200 if (mid_entry->mid == cur_mid &&
201 mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
202 /* This mid is in use, try a different one */
203 collision = true;
204 break;
205 }
206 }
207
208 /*
209 * if we have more than 32k mids in the list, then something
210 * is very wrong. Possibly a local user is trying to DoS the
211 * box by issuing long-running calls and SIGKILL'ing them. If
212 * we get to 2^16 mids then we're in big trouble as this
213 * function could loop forever.
214 *
215 * Go ahead and assign out the mid in this situation, but force
216 * an eventual reconnect to clean out the pending_mid_q.
217 */
218 if (num_mids > 32768)
219 server->tcpStatus = CifsNeedReconnect;
220
221 if (!collision) {
222 mid = (__u64)cur_mid;
223 server->CurrentMid = mid;
224 break;
225 }
226 cur_mid++;
227 }
228 spin_unlock(&GlobalMid_Lock);
229 return mid;
230}
231
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400232/*
233 return codes:
234 0 not a transact2, or all data present
235 >0 transact2 with that much data missing
236 -EINVAL invalid transact2
237 */
238static int
239check2ndT2(char *buf)
240{
241 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
242 struct smb_t2_rsp *pSMBt;
243 int remaining;
244 __u16 total_data_size, data_in_this_rsp;
245
246 if (pSMB->Command != SMB_COM_TRANSACTION2)
247 return 0;
248
249 /* check for plausible wct, bcc and t2 data and parm sizes */
250 /* check for parm and data offset going beyond end of smb */
251 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
252 cFYI(1, "invalid transact2 word count");
253 return -EINVAL;
254 }
255
256 pSMBt = (struct smb_t2_rsp *)pSMB;
257
258 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
259 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
260
261 if (total_data_size == data_in_this_rsp)
262 return 0;
263 else if (total_data_size < data_in_this_rsp) {
264 cFYI(1, "total data %d smaller than data in frame %d",
265 total_data_size, data_in_this_rsp);
266 return -EINVAL;
267 }
268
269 remaining = total_data_size - data_in_this_rsp;
270
271 cFYI(1, "missing %d bytes from transact2, check next response",
272 remaining);
273 if (total_data_size > CIFSMaxBufSize) {
274 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
275 total_data_size, CIFSMaxBufSize);
276 return -EINVAL;
277 }
278 return remaining;
279}
280
281static int
282coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
283{
284 struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
285 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr;
286 char *data_area_of_tgt;
287 char *data_area_of_src;
288 int remaining;
289 unsigned int byte_count, total_in_tgt;
290 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
291
292 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
293 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
294
295 if (tgt_total_cnt != src_total_cnt)
296 cFYI(1, "total data count of primary and secondary t2 differ "
297 "source=%hu target=%hu", src_total_cnt, tgt_total_cnt);
298
299 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
300
301 remaining = tgt_total_cnt - total_in_tgt;
302
303 if (remaining < 0) {
304 cFYI(1, "Server sent too much data. tgt_total_cnt=%hu "
305 "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt);
306 return -EPROTO;
307 }
308
309 if (remaining == 0) {
310 /* nothing to do, ignore */
311 cFYI(1, "no more data remains");
312 return 0;
313 }
314
315 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
316 if (remaining < total_in_src)
317 cFYI(1, "transact2 2nd response contains too much data");
318
319 /* find end of first SMB data area */
320 data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
321 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
322
323 /* validate target area */
324 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
325 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
326
327 data_area_of_tgt += total_in_tgt;
328
329 total_in_tgt += total_in_src;
330 /* is the result too big for the field? */
331 if (total_in_tgt > USHRT_MAX) {
332 cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt);
333 return -EPROTO;
334 }
335 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
336
337 /* fix up the BCC */
338 byte_count = get_bcc(target_hdr);
339 byte_count += total_in_src;
340 /* is the result too big for the field? */
341 if (byte_count > USHRT_MAX) {
342 cFYI(1, "coalesced BCC too large (%u)", byte_count);
343 return -EPROTO;
344 }
345 put_bcc(byte_count, target_hdr);
346
347 byte_count = be32_to_cpu(target_hdr->smb_buf_length);
348 byte_count += total_in_src;
349 /* don't allow buffer to overflow */
350 if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
351 cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count);
352 return -ENOBUFS;
353 }
354 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
355
356 /* copy second buffer into end of first buffer */
357 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
358
359 if (remaining != total_in_src) {
360 /* more responses to go */
361 cFYI(1, "waiting for more secondary responses");
362 return 1;
363 }
364
365 /* we are done */
366 cFYI(1, "found the last secondary response");
367 return 0;
368}
369
370static bool
371cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
372 char *buf, int malformed)
373{
374 if (malformed)
375 return false;
376 if (check2ndT2(buf) <= 0)
377 return false;
378 mid->multiRsp = true;
379 if (mid->resp_buf) {
380 /* merge response - fix up 1st*/
381 malformed = coalesce_t2(buf, mid->resp_buf);
382 if (malformed > 0)
383 return true;
384 /* All parts received or packet is malformed. */
385 mid->multiEnd = true;
386 dequeue_mid(mid, malformed);
387 return true;
388 }
389 if (!server->large_buf) {
390 /*FIXME: switch to already allocated largebuf?*/
391 cERROR(1, "1st trans2 resp needs bigbuf");
392 } else {
393 /* Have first buffer */
394 mid->resp_buf = buf;
395 mid->large_buf = true;
396 server->bigbuf = NULL;
397 }
398 return true;
399}
400
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400401static bool
402cifs_need_neg(struct TCP_Server_Info *server)
403{
404 return server->maxBuf == 0;
405}
406
407static int
408cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
409{
410 int rc;
411 rc = CIFSSMBNegotiate(xid, ses);
412 if (rc == -EAGAIN) {
413 /* retry only once on 1st time connection */
414 set_credits(ses->server, 1);
415 rc = CIFSSMBNegotiate(xid, ses);
416 if (rc == -EAGAIN)
417 rc = -EHOSTDOWN;
418 }
419 return rc;
420}
421
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700422static unsigned int
423cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
424{
425 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
426 struct TCP_Server_Info *server = tcon->ses->server;
427 unsigned int wsize;
428
429 /* start with specified wsize, or default */
430 if (volume_info->wsize)
431 wsize = volume_info->wsize;
432 else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
433 wsize = CIFS_DEFAULT_IOSIZE;
434 else
435 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
436
437 /* can server support 24-bit write sizes? (via UNIX extensions) */
438 if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
439 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
440
441 /*
442 * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
443 * Limit it to max buffer offered by the server, minus the size of the
444 * WRITEX header, not including the 4 byte RFC1001 length.
445 */
446 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
447 (!(server->capabilities & CAP_UNIX) &&
448 (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED))))
449 wsize = min_t(unsigned int, wsize,
450 server->maxBuf - sizeof(WRITE_REQ) + 4);
451
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700452 /* hard limit of CIFS_MAX_WSIZE */
453 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
454
455 return wsize;
456}
457
458static unsigned int
459cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
460{
461 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
462 struct TCP_Server_Info *server = tcon->ses->server;
463 unsigned int rsize, defsize;
464
465 /*
466 * Set default value...
467 *
468 * HACK alert! Ancient servers have very small buffers. Even though
469 * MS-CIFS indicates that servers are only limited by the client's
470 * bufsize for reads, testing against win98se shows that it throws
471 * INVALID_PARAMETER errors if you try to request too large a read.
472 * OS/2 just sends back short reads.
473 *
474 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
475 * it can't handle a read request larger than its MaxBufferSize either.
476 */
477 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
478 defsize = CIFS_DEFAULT_IOSIZE;
479 else if (server->capabilities & CAP_LARGE_READ_X)
480 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
481 else
482 defsize = server->maxBuf - sizeof(READ_RSP);
483
484 rsize = volume_info->rsize ? volume_info->rsize : defsize;
485
486 /*
487 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
488 * the client's MaxBufferSize.
489 */
490 if (!(server->capabilities & CAP_LARGE_READ_X))
491 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
492
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700493 /* hard limit of CIFS_MAX_RSIZE */
494 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
495
496 return rsize;
497}
498
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +0400499static void
500cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
501{
502 CIFSSMBQFSDeviceInfo(xid, tcon);
503 CIFSSMBQFSAttributeInfo(xid, tcon);
504}
505
Pavel Shilovsky68889f22012-05-25 14:40:22 +0400506static int
507cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
508 struct cifs_sb_info *cifs_sb, const char *full_path)
509{
510 int rc;
511 FILE_ALL_INFO *file_info;
512
513 file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
514 if (file_info == NULL)
515 return -ENOMEM;
516
517 rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
518 0 /* not legacy */, cifs_sb->local_nls,
519 cifs_sb->mnt_cifs_flags &
520 CIFS_MOUNT_MAP_SPECIAL_CHR);
521
522 if (rc == -EOPNOTSUPP || rc == -EINVAL)
523 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
524 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
525 CIFS_MOUNT_MAP_SPECIAL_CHR);
526 kfree(file_info);
527 return rc;
528}
529
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400530static int
531cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
532 struct cifs_sb_info *cifs_sb, const char *full_path,
533 FILE_ALL_INFO *data, bool *adjustTZ)
534{
535 int rc;
536
537 /* could do find first instead but this returns more info */
538 rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
539 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
540 CIFS_MOUNT_MAP_SPECIAL_CHR);
541 /*
542 * BB optimize code so we do not make the above call when server claims
543 * no NT SMB support and the above call failed at least once - set flag
544 * in tcon or mount.
545 */
546 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
547 rc = SMBQueryInformation(xid, tcon, full_path, data,
548 cifs_sb->local_nls,
549 cifs_sb->mnt_cifs_flags &
550 CIFS_MOUNT_MAP_SPECIAL_CHR);
551 *adjustTZ = true;
552 }
553 return rc;
554}
555
556static int
557cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
558 struct cifs_sb_info *cifs_sb, const char *full_path,
559 u64 *uniqueid, FILE_ALL_INFO *data)
560{
561 /*
562 * We can not use the IndexNumber field by default from Windows or
563 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
564 * CIFS spec claims that this value is unique within the scope of a
565 * share, and the windows docs hint that it's actually unique
566 * per-machine.
567 *
568 * There may be higher info levels that work but are there Windows
569 * server or network appliances for which IndexNumber field is not
570 * guaranteed unique?
571 */
572 return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
573 cifs_sb->local_nls,
574 cifs_sb->mnt_cifs_flags &
575 CIFS_MOUNT_MAP_SPECIAL_CHR);
576}
577
Pavel Shilovsky4ad65042012-09-18 16:20:26 -0700578static int
579cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
580 struct cifs_fid *fid, FILE_ALL_INFO *data)
581{
582 return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
583}
584
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400585static void
586cifs_clear_stats(struct cifs_tcon *tcon)
587{
588#ifdef CONFIG_CIFS_STATS
589 atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
590 atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
591 atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
592 atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
593 atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
594 atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
595 atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
596 atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
597 atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
598 atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
599 atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
600 atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
601 atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
602 atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
603 atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
604 atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
605 atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
606 atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
607 atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
608 atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
609 atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
610#endif
611}
612
613static void
614cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
615{
616#ifdef CONFIG_CIFS_STATS
617 seq_printf(m, " Oplocks breaks: %d",
618 atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
619 seq_printf(m, "\nReads: %d Bytes: %llu",
620 atomic_read(&tcon->stats.cifs_stats.num_reads),
621 (long long)(tcon->bytes_read));
622 seq_printf(m, "\nWrites: %d Bytes: %llu",
623 atomic_read(&tcon->stats.cifs_stats.num_writes),
624 (long long)(tcon->bytes_written));
625 seq_printf(m, "\nFlushes: %d",
626 atomic_read(&tcon->stats.cifs_stats.num_flushes));
627 seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
628 atomic_read(&tcon->stats.cifs_stats.num_locks),
629 atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
630 atomic_read(&tcon->stats.cifs_stats.num_symlinks));
631 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
632 atomic_read(&tcon->stats.cifs_stats.num_opens),
633 atomic_read(&tcon->stats.cifs_stats.num_closes),
634 atomic_read(&tcon->stats.cifs_stats.num_deletes));
635 seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
636 atomic_read(&tcon->stats.cifs_stats.num_posixopens),
637 atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
638 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
639 atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
640 atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
641 seq_printf(m, "\nRenames: %d T2 Renames %d",
642 atomic_read(&tcon->stats.cifs_stats.num_renames),
643 atomic_read(&tcon->stats.cifs_stats.num_t2renames));
644 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
645 atomic_read(&tcon->stats.cifs_stats.num_ffirst),
646 atomic_read(&tcon->stats.cifs_stats.num_fnext),
647 atomic_read(&tcon->stats.cifs_stats.num_fclose));
648#endif
649}
650
Pavel Shilovskyf4367202012-03-17 11:41:12 +0300651static void
652cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
653 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
654 const unsigned int xid)
655{
656 FILE_BASIC_INFO info;
657 struct cifsInodeInfo *cifsInode;
658 u32 dosattrs;
659 int rc;
660
661 memset(&info, 0, sizeof(info));
662 cifsInode = CIFS_I(inode);
663 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
664 info.Attributes = cpu_to_le32(dosattrs);
665 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
666 cifs_sb->mnt_cifs_flags &
667 CIFS_MOUNT_MAP_SPECIAL_CHR);
668 if (rc == 0)
669 cifsInode->cifsAttrs = dosattrs;
670}
671
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700672static int
673cifs_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
674 int disposition, int desired_access, int create_options,
675 struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
676 struct cifs_sb_info *cifs_sb)
677{
678 if (!(tcon->ses->capabilities & CAP_NT_SMBS))
679 return SMBLegacyOpen(xid, tcon, path, disposition,
Pavel Shilovsky25364132012-09-18 16:20:27 -0700680 desired_access, create_options,
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700681 &fid->netfid, oplock, buf,
682 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
683 & CIFS_MOUNT_MAP_SPECIAL_CHR);
684 return CIFSSMBOpen(xid, tcon, path, disposition, desired_access,
685 create_options, &fid->netfid, oplock, buf,
686 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
687 CIFS_MOUNT_MAP_SPECIAL_CHR);
688}
689
690static void
691cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
692{
693 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
694 cfile->fid.netfid = fid->netfid;
695 cifs_set_oplock_level(cinode, oplock);
696 cinode->can_cache_brlcks = cinode->clientCanCacheAll;
697}
698
Pavel Shilovsky760ad0c2012-09-25 11:00:07 +0400699static void
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700700cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
701 struct cifs_fid *fid)
702{
Pavel Shilovsky760ad0c2012-09-25 11:00:07 +0400703 CIFSSMBClose(xid, tcon, fid->netfid);
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700704}
705
Pavel Shilovsky1d8c4c02012-09-18 16:20:27 -0700706static int
707cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
708 struct cifs_fid *fid)
709{
710 return CIFSSMBFlush(xid, tcon, fid->netfid);
711}
712
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700713static int
714cifs_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
715 struct cifs_io_parms *parms, unsigned int *bytes_read,
716 char **buf, int *buf_type)
717{
718 parms->netfid = cfile->fid.netfid;
719 return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
720}
721
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700722static int
723cifs_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
724 struct cifs_io_parms *parms, unsigned int *written,
725 struct kvec *iov, unsigned long nr_segs)
726{
727
728 parms->netfid = cfile->fid.netfid;
729 return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
730}
731
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700732static int
733smb_set_file_info(struct inode *inode, const char *full_path,
734 FILE_BASIC_INFO *buf, const unsigned int xid)
735{
736 int oplock = 0;
737 int rc;
738 __u16 netfid;
739 __u32 netpid;
740 struct cifsFileInfo *open_file;
741 struct cifsInodeInfo *cinode = CIFS_I(inode);
742 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
743 struct tcon_link *tlink = NULL;
744 struct cifs_tcon *tcon;
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700745
746 /* if the file is already open for write, just use that fileid */
747 open_file = find_writable_file(cinode, true);
748 if (open_file) {
749 netfid = open_file->fid.netfid;
750 netpid = open_file->pid;
751 tcon = tlink_tcon(open_file->tlink);
752 goto set_via_filehandle;
753 }
754
755 tlink = cifs_sb_tlink(cifs_sb);
756 if (IS_ERR(tlink)) {
757 rc = PTR_ERR(tlink);
758 tlink = NULL;
759 goto out;
760 }
761 tcon = tlink_tcon(tlink);
762
763 /*
764 * NT4 apparently returns success on this call, but it doesn't really
765 * work.
766 */
767 if (!(tcon->ses->flags & CIFS_SES_NT4)) {
768 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf,
769 cifs_sb->local_nls,
770 cifs_sb->mnt_cifs_flags &
771 CIFS_MOUNT_MAP_SPECIAL_CHR);
772 if (rc == 0) {
773 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
774 goto out;
775 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
776 goto out;
777 }
778
779 cFYI(1, "calling SetFileInfo since SetPathInfo for times not supported "
780 "by this server");
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);
785
786 if (rc != 0) {
787 if (rc == -EIO)
788 rc = -EINVAL;
789 goto out;
790 }
791
792 netpid = current->tgid;
793
794set_via_filehandle:
Pavel Shilovskyc772aa92012-11-28 15:27:54 +0400795 rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid);
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700796 if (!rc)
797 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
798
799 if (open_file == NULL)
800 CIFSSMBClose(xid, tcon, netfid);
801 else
802 cifsFileInfo_put(open_file);
803out:
804 if (tlink != NULL)
805 cifs_put_tlink(tlink);
806 return rc;
807}
808
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700809static int
810cifs_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)
814{
Shirish Pargaonkarc052e2b2012-09-28 12:21:14 -0500815 return CIFSFindFirst(xid, tcon, path, cifs_sb,
816 &fid->netfid, search_flags, srch_inf, true);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700817}
818
819static int
820cifs_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)
823{
824 return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
825}
826
827static int
828cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
829 struct cifs_fid *fid)
830{
831 return CIFSFindClose(xid, tcon, fid->netfid);
832}
833
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700834static int
835cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
836 struct cifsInodeInfo *cinode)
837{
838 return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
839 LOCKING_ANDX_OPLOCK_RELEASE, false,
840 cinode->clientCanCacheRead ? 1 : 0);
841}
842
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700843static int
844cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
845 struct kstatfs *buf)
846{
847 int rc = -EOPNOTSUPP;
848
849 buf->f_type = CIFS_MAGIC_NUMBER;
850
851 /*
852 * We could add a second check for a QFS Unix capability bit
853 */
854 if ((tcon->ses->capabilities & CAP_UNIX) &&
855 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
856 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
857
858 /*
859 * Only need to call the old QFSInfo if failed on newer one,
860 * e.g. by OS/2.
861 **/
862 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
863 rc = CIFSSMBQFSInfo(xid, tcon, buf);
864
865 /*
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
869 */
870 if (rc)
871 rc = SMBOldQFSInfo(xid, tcon, buf);
872 return rc;
873}
874
Pavel Shilovskyd39a4f72012-09-19 06:22:43 -0700875static int
876cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
877 __u64 length, __u32 type, int lock, int unlock, bool wait)
878{
879 return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
880 current->tgid, length, offset, unlock, lock,
881 (__u8)type, wait, 0);
882}
883
Jeff Layton23db65f2012-05-15 12:20:51 -0400884struct smb_version_operations smb1_operations = {
Jeff Layton121b0462012-05-15 12:21:10 -0400885 .send_cancel = send_nt_cancel,
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300886 .compare_fids = cifs_compare_fids,
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400887 .setup_request = cifs_setup_request,
Pavel Shilovsky45740842012-06-01 14:26:18 +0400888 .setup_async_request = cifs_setup_async_request,
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400889 .check_receive = cifs_check_receive,
Pavel Shilovsky45275782012-05-17 17:53:29 +0400890 .add_credits = cifs_add_credits,
891 .set_credits = cifs_set_credits,
892 .get_credits_field = cifs_get_credits_field,
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400893 .get_credits = cifs_get_credits,
Pavel Shilovsky88257362012-05-23 14:01:59 +0400894 .get_next_mid = cifs_get_next_mid,
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400895 .read_data_offset = cifs_read_data_offset,
896 .read_data_length = cifs_read_data_length,
897 .map_error = map_smb_to_linux_error,
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400898 .find_mid = cifs_find_mid,
899 .check_message = checkSMB,
900 .dump_detail = cifs_dump_detail,
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400901 .clear_stats = cifs_clear_stats,
902 .print_stats = cifs_print_stats,
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400903 .is_oplock_break = is_valid_oplock_break,
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400904 .check_trans2 = cifs_check_trans2,
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400905 .need_neg = cifs_need_neg,
906 .negotiate = cifs_negotiate,
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700907 .negotiate_wsize = cifs_negotiate_wsize,
908 .negotiate_rsize = cifs_negotiate_rsize,
Pavel Shilovsky58c45c52012-05-25 10:54:49 +0400909 .sess_setup = CIFS_SessSetup,
910 .logoff = CIFSSMBLogoff,
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400911 .tree_connect = CIFSTCon,
912 .tree_disconnect = CIFSSMBTDis,
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400913 .get_dfs_refer = CIFSGetDFSRefer,
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +0400914 .qfs_tcon = cifs_qfs_tcon,
Pavel Shilovsky68889f22012-05-25 14:40:22 +0400915 .is_path_accessible = cifs_is_path_accessible,
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400916 .query_path_info = cifs_query_path_info,
Pavel Shilovsky4ad65042012-09-18 16:20:26 -0700917 .query_file_info = cifs_query_file_info,
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400918 .get_srv_inum = cifs_get_srv_inum,
Pavel Shilovskyd1433412012-09-18 16:20:31 -0700919 .set_path_size = CIFSSMBSetEOF,
920 .set_file_size = CIFSSMBSetFileSize,
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700921 .set_file_info = smb_set_file_info,
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400922 .echo = CIFSSMBEcho,
Pavel Shilovskyf4367202012-03-17 11:41:12 +0300923 .mkdir = CIFSSMBMkDir,
924 .mkdir_setinfo = cifs_mkdir_setinfo,
Pavel Shilovskyf958ca52012-07-10 16:14:18 +0400925 .rmdir = CIFSSMBRmDir,
Pavel Shilovskyed6875e2012-09-18 16:20:25 -0700926 .unlink = CIFSSMBDelFile,
927 .rename_pending_delete = cifs_rename_pending_delete,
Pavel Shilovsky8ceb9842012-09-18 16:20:30 -0700928 .rename = CIFSSMBRename,
Steve Frenchd6e906f2012-09-18 16:20:31 -0700929 .create_hardlink = CIFSCreateHardLink,
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700930 .open = cifs_open_file,
931 .set_fid = cifs_set_fid,
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700932 .close = cifs_close_file,
Pavel Shilovsky1d8c4c02012-09-18 16:20:27 -0700933 .flush = cifs_flush_file,
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700934 .async_readv = cifs_async_readv,
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700935 .async_writev = cifs_async_writev,
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700936 .sync_read = cifs_sync_read,
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700937 .sync_write = cifs_sync_write,
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700938 .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,
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700942 .oplock_response = cifs_oplock_response,
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700943 .queryfs = cifs_queryfs,
Pavel Shilovskyd39a4f72012-09-19 06:22:43 -0700944 .mand_lock = cifs_mand_lock,
945 .mand_unlock_range = cifs_unlock_range,
946 .push_mand_locks = cifs_push_mandatory_locks,
Jeff Layton23db65f2012-05-15 12:20:51 -0400947};
948
949struct smb_version_values smb1_values = {
950 .version_string = SMB1_VERSION_STRING,
Pavel Shilovsky106dc532012-02-28 14:23:34 +0300951 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
952 .exclusive_lock_type = 0,
953 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
954 .unlock_lock_type = 0,
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400955 .header_size = sizeof(struct smb_hdr),
956 .max_header_size = MAX_CIFS_HDR_SIZE,
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400957 .read_rsp_size = sizeof(READ_RSP),
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +0400958 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400959 .cap_unix = CAP_UNIX,
960 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
961 .cap_large_files = CAP_LARGE_FILES,
Pavel Shilovsky63b7d3a2012-12-24 14:41:19 +0400962 .oplock_read = OPLOCK_READ,
Jeff Layton23db65f2012-05-15 12:20:51 -0400963};