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Merge tag 'v3.10.107' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / smb1ops.c
CommitLineData
23db65f5
JL		 1/*
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
24985c53 20#include <linux/pagemap.h>
76ec5e33 21#include <linux/vfs.h>
23db65f5 22#include "cifsglob.h"
121b046a
JL		 23#include "cifsproto.h"
24#include "cifs_debug.h"
106dc538 25#include "cifspdu.h"
121b046a
JL		 26
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 }
31efee60
JL		 56
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;
121b046a 63 rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
ad313cb8
JL		 64 if (rc < 0)
65 server->sequence_number--;
66
121b046a
JL		 67 mutex_unlock(&server->srv_mutex);
68
f96637be
JP		 69 cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
70 in_buf->Mid, rc);
121b046a
JL		 71
72 return rc;
73}
23db65f5 74
55157dfb
PS		 75static bool
76cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
77{
4b4de76e 78 return ob1->fid.netfid == ob2->fid.netfid;
55157dfb
PS		 79}
80
eb378711
PS		 81static unsigned int
82cifs_read_data_offset(char *buf)
83{
84 READ_RSP *rsp = (READ_RSP *)buf;
85 return le16_to_cpu(rsp->DataOffset);
86}
87
88static unsigned int
89cifs_read_data_length(char *buf)
90{
91 READ_RSP *rsp = (READ_RSP *)buf;
92 return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
93 le16_to_cpu(rsp->DataLength);
94}
95
8aa26f3e
PS		 96static struct mid_q_entry *
97cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
98{
99 struct smb_hdr *buf = (struct smb_hdr *)buffer;
100 struct mid_q_entry *mid;
101
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);
108 return mid;
109 }
110 }
111 spin_unlock(&GlobalMid_Lock);
112 return NULL;
113}
114
45275789 115static void
a891f0f8
PS		 116cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add,
117 const int optype)
45275789
PS		 118{
119 spin_lock(&server->req_lock);
120 server->credits += add;
121 server->in_flight--;
122 spin_unlock(&server->req_lock);
123 wake_up(&server->request_q);
124}
125
126static void
127cifs_set_credits(struct TCP_Server_Info *server, const int val)
128{
129 spin_lock(&server->req_lock);
130 server->credits = val;
131 server->oplocks = val > 1 ? enable_oplocks : false;
132 spin_unlock(&server->req_lock);
133}
134
135static int *
a891f0f8 136cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
45275789
PS		 137{
138 return &server->credits;
139}
140
a891f0f8
PS		 141static unsigned int
142cifs_get_credits(struct mid_q_entry *mid)
143{
144 return 1;
145}
146
88257360
PS		 147/*
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.
167 */
168static __u64
169cifs_get_next_mid(struct TCP_Server_Info *server)
170{
171 __u64 mid = 0;
172 __u16 last_mid, cur_mid;
173 bool collision;
174
175 spin_lock(&GlobalMid_Lock);
176
177 /* mid is 16 bit only for CIFS/SMB */
178 cur_mid = (__u16)((server->CurrentMid) & 0xffff);
179 /* we do not want to loop forever */
180 last_mid = cur_mid;
181 cur_mid++;
182
183 /*
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
190 * did not time out).
191 */
192 while (cur_mid != last_mid) {
193 struct mid_q_entry *mid_entry;
194 unsigned int num_mids;
195
196 collision = false;
197 if (cur_mid == 0)
198 cur_mid++;
199
200 num_mids = 0;
201 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
202 ++num_mids;
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 */
206 collision = true;
207 break;
208 }
209 }
210
211 /*
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.
217 *
218 * Go ahead and assign out the mid in this situation, but force
219 * an eventual reconnect to clean out the pending_mid_q.
220 */
221 if (num_mids > 32768)
222 server->tcpStatus = CifsNeedReconnect;
223
224 if (!collision) {
225 mid = (__u64)cur_mid;
226 server->CurrentMid = mid;
227 break;
228 }
229 cur_mid++;
230 }
231 spin_unlock(&GlobalMid_Lock);
232 return mid;
233}
234
316cf94a
PS		 235/*
236 return codes:
237 0 not a transact2, or all data present
238 >0 transact2 with that much data missing
239 -EINVAL invalid transact2
240 */
241static int
242check2ndT2(char *buf)
243{
244 struct smb_hdr *pSMB = (struct smb_hdr *)buf;
245 struct smb_t2_rsp *pSMBt;
246 int remaining;
247 __u16 total_data_size, data_in_this_rsp;
248
249 if (pSMB->Command != SMB_COM_TRANSACTION2)
250 return 0;
251
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 */
f96637be 255 cifs_dbg(FYI, "invalid transact2 word count\n");
316cf94a
PS		 256 return -EINVAL;
257 }
258
259 pSMBt = (struct smb_t2_rsp *)pSMB;
260
261 total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
262 data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
263
264 if (total_data_size == data_in_this_rsp)
265 return 0;
266 else if (total_data_size < data_in_this_rsp) {
f96637be
JP		 267 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
268 total_data_size, data_in_this_rsp);
316cf94a
PS		 269 return -EINVAL;
270 }
271
272 remaining = total_data_size - data_in_this_rsp;
273
f96637be
JP		 274 cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
275 remaining);
316cf94a 276 if (total_data_size > CIFSMaxBufSize) {
f96637be
JP		 277 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
278 total_data_size, CIFSMaxBufSize);
316cf94a
PS		 279 return -EINVAL;
280 }
281 return remaining;
282}
283
284static int
285coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
286{
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;
291 int remaining;
292 unsigned int byte_count, total_in_tgt;
293 __u16 tgt_total_cnt, src_total_cnt, total_in_src;
294
295 src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
296 tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
297
298 if (tgt_total_cnt != src_total_cnt)
f96637be
JP		 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);
316cf94a
PS		 301
302 total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
303
304 remaining = tgt_total_cnt - total_in_tgt;
305
306 if (remaining < 0) {
f96637be
JP		 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);
316cf94a
PS		 309 return -EPROTO;
310 }
311
312 if (remaining == 0) {
313 /* nothing to do, ignore */
f96637be 314 cifs_dbg(FYI, "no more data remains\n");
316cf94a
PS		 315 return 0;
316 }
317
318 total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
319 if (remaining < total_in_src)
f96637be 320 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
316cf94a
PS		 321
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);
325
326 /* validate target area */
327 data_area_of_src = (char *)&pSMBs->hdr.Protocol +
328 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
329
330 data_area_of_tgt += total_in_tgt;
331
332 total_in_tgt += total_in_src;
333 /* is the result too big for the field? */
334 if (total_in_tgt > USHRT_MAX) {
f96637be
JP		 335 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
336 total_in_tgt);
316cf94a
PS		 337 return -EPROTO;
338 }
339 put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
340
341 /* fix up the BCC */
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) {
f96637be 346 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
316cf94a
PS		 347 return -EPROTO;
348 }
349 put_bcc(byte_count, target_hdr);
350
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) {
f96637be
JP		 355 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
356 byte_count);
316cf94a
PS		 357 return -ENOBUFS;
358 }
359 target_hdr->smb_buf_length = cpu_to_be32(byte_count);
360
361 /* copy second buffer into end of first buffer */
362 memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
363
364 if (remaining != total_in_src) {
365 /* more responses to go */
f96637be 366 cifs_dbg(FYI, "waiting for more secondary responses\n");
316cf94a
PS		 367 return 1;
368 }
369
370 /* we are done */
f96637be 371 cifs_dbg(FYI, "found the last secondary response\n");
316cf94a
PS		 372 return 0;
373}
374
375static bool
376cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
377 char *buf, int malformed)
378{
379 if (malformed)
380 return false;
381 if (check2ndT2(buf) <= 0)
382 return false;
383 mid->multiRsp = true;
384 if (mid->resp_buf) {
385 /* merge response - fix up 1st*/
386 malformed = coalesce_t2(buf, mid->resp_buf);
387 if (malformed > 0)
388 return true;
389 /* All parts received or packet is malformed. */
390 mid->multiEnd = true;
391 dequeue_mid(mid, malformed);
392 return true;
393 }
394 if (!server->large_buf) {
395 /*FIXME: switch to already allocated largebuf?*/
f96637be 396 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
316cf94a
PS		 397 } else {
398 /* Have first buffer */
399 mid->resp_buf = buf;
400 mid->large_buf = true;
401 server->bigbuf = NULL;
402 }
403 return true;
404}
405
286170aa
PS		 406static bool
407cifs_need_neg(struct TCP_Server_Info *server)
408{
409 return server->maxBuf == 0;
410}
411
412static int
413cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
414{
415 int rc;
416 rc = CIFSSMBNegotiate(xid, ses);
417 if (rc == -EAGAIN) {
418 /* retry only once on 1st time connection */
419 set_credits(ses->server, 1);
420 rc = CIFSSMBNegotiate(xid, ses);
421 if (rc == -EAGAIN)
422 rc = -EHOSTDOWN;
423 }
424 return rc;
425}
426
24985c53
PS		 427static unsigned int
428cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
429{
430 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
431 struct TCP_Server_Info *server = tcon->ses->server;
432 unsigned int wsize;
433
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;
439 else
440 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
441
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);
445
446 /*
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.
450 */
451 if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
452 (!(server->capabilities & CAP_UNIX) &&
453 (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED))))
454 wsize = min_t(unsigned int, wsize,
455 server->maxBuf - sizeof(WRITE_REQ) + 4);
456
24985c53
PS		 457 /* hard limit of CIFS_MAX_WSIZE */
458 wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
459
460 return wsize;
461}
462
463static unsigned int
464cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
465{
466 __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
467 struct TCP_Server_Info *server = tcon->ses->server;
468 unsigned int rsize, defsize;
469
470 /*
471 * Set default value...
472 *
473 * HACK alert! Ancient servers have very small buffers. Even though
474 * MS-CIFS indicates that servers are only limited by the client's
475 * bufsize for reads, testing against win98se shows that it throws
476 * INVALID_PARAMETER errors if you try to request too large a read.
477 * OS/2 just sends back short reads.
478 *
479 * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
480 * it can't handle a read request larger than its MaxBufferSize either.
481 */
482 if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
483 defsize = CIFS_DEFAULT_IOSIZE;
484 else if (server->capabilities & CAP_LARGE_READ_X)
485 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
486 else
487 defsize = server->maxBuf - sizeof(READ_RSP);
488
489 rsize = volume_info->rsize ? volume_info->rsize : defsize;
490
491 /*
492 * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
493 * the client's MaxBufferSize.
494 */
495 if (!(server->capabilities & CAP_LARGE_READ_X))
496 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
497
24985c53
PS		 498 /* hard limit of CIFS_MAX_RSIZE */
499 rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
500
501 return rsize;
502}
503
af4281dc
PS		 504static void
505cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
506{
507 CIFSSMBQFSDeviceInfo(xid, tcon);
508 CIFSSMBQFSAttributeInfo(xid, tcon);
509}
510
68889f26
PS		 511static int
512cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
513 struct cifs_sb_info *cifs_sb, const char *full_path)
514{
515 int rc;
516 FILE_ALL_INFO *file_info;
517
518 file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
519 if (file_info == NULL)
520 return -ENOMEM;
521
522 rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
523 0 /* not legacy */, cifs_sb->local_nls,
524 cifs_sb->mnt_cifs_flags &
525 CIFS_MOUNT_MAP_SPECIAL_CHR);
526
527 if (rc == -EOPNOTSUPP || rc == -EINVAL)
528 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
529 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
530 CIFS_MOUNT_MAP_SPECIAL_CHR);
531 kfree(file_info);
532 return rc;
533}
534
1208ef1f
PS		 535static int
536cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
537 struct cifs_sb_info *cifs_sb, const char *full_path,
538 FILE_ALL_INFO *data, bool *adjustTZ)
539{
540 int rc;
541
542 /* could do find first instead but this returns more info */
543 rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
544 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
545 CIFS_MOUNT_MAP_SPECIAL_CHR);
546 /*
547 * BB optimize code so we do not make the above call when server claims
548 * no NT SMB support and the above call failed at least once - set flag
549 * in tcon or mount.
550 */
551 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
552 rc = SMBQueryInformation(xid, tcon, full_path, data,
553 cifs_sb->local_nls,
554 cifs_sb->mnt_cifs_flags &
555 CIFS_MOUNT_MAP_SPECIAL_CHR);
556 *adjustTZ = true;
557 }
558 return rc;
559}
560
561static int
562cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
563 struct cifs_sb_info *cifs_sb, const char *full_path,
564 u64 *uniqueid, FILE_ALL_INFO *data)
565{
566 /*
567 * We can not use the IndexNumber field by default from Windows or
568 * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
569 * CIFS spec claims that this value is unique within the scope of a
570 * share, and the windows docs hint that it's actually unique
571 * per-machine.
572 *
573 * There may be higher info levels that work but are there Windows
574 * server or network appliances for which IndexNumber field is not
575 * guaranteed unique?
576 */
577 return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
578 cifs_sb->local_nls,
579 cifs_sb->mnt_cifs_flags &
580 CIFS_MOUNT_MAP_SPECIAL_CHR);
581}
582
4ad65044
PS		 583static int
584cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
585 struct cifs_fid *fid, FILE_ALL_INFO *data)
586{
587 return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
588}
589
44c58186
PS		 590static void
591cifs_clear_stats(struct cifs_tcon *tcon)
592{
593#ifdef CONFIG_CIFS_STATS
594 atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
595 atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
596 atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
597 atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
598 atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
599 atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
600 atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
601 atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
602 atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
603 atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
604 atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
605 atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
606 atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
607 atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
608 atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
609 atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
610 atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
611 atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
612 atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
613 atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
614 atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
615#endif
616}
617
618static void
619cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
620{
621#ifdef CONFIG_CIFS_STATS
622 seq_printf(m, " Oplocks breaks: %d",
623 atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
624 seq_printf(m, "\nReads: %d Bytes: %llu",
625 atomic_read(&tcon->stats.cifs_stats.num_reads),
626 (long long)(tcon->bytes_read));
627 seq_printf(m, "\nWrites: %d Bytes: %llu",
628 atomic_read(&tcon->stats.cifs_stats.num_writes),
629 (long long)(tcon->bytes_written));
630 seq_printf(m, "\nFlushes: %d",
631 atomic_read(&tcon->stats.cifs_stats.num_flushes));
632 seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
633 atomic_read(&tcon->stats.cifs_stats.num_locks),
634 atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
635 atomic_read(&tcon->stats.cifs_stats.num_symlinks));
636 seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
637 atomic_read(&tcon->stats.cifs_stats.num_opens),
638 atomic_read(&tcon->stats.cifs_stats.num_closes),
639 atomic_read(&tcon->stats.cifs_stats.num_deletes));
640 seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
641 atomic_read(&tcon->stats.cifs_stats.num_posixopens),
642 atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
643 seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
644 atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
645 atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
646 seq_printf(m, "\nRenames: %d T2 Renames %d",
647 atomic_read(&tcon->stats.cifs_stats.num_renames),
648 atomic_read(&tcon->stats.cifs_stats.num_t2renames));
649 seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
650 atomic_read(&tcon->stats.cifs_stats.num_ffirst),
651 atomic_read(&tcon->stats.cifs_stats.num_fnext),
652 atomic_read(&tcon->stats.cifs_stats.num_fclose));
653#endif
654}
655
f436720e
PS		 656static void
657cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
658 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
659 const unsigned int xid)
660{
661 FILE_BASIC_INFO info;
662 struct cifsInodeInfo *cifsInode;
663 u32 dosattrs;
664 int rc;
665
666 memset(&info, 0, sizeof(info));
667 cifsInode = CIFS_I(inode);
668 dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
669 info.Attributes = cpu_to_le32(dosattrs);
670 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
671 cifs_sb->mnt_cifs_flags &
672 CIFS_MOUNT_MAP_SPECIAL_CHR);
673 if (rc == 0)
674 cifsInode->cifsAttrs = dosattrs;
675}
676
fb1214e4
PS		 677static int
678cifs_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path,
679 int disposition, int desired_access, int create_options,
680 struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf,
681 struct cifs_sb_info *cifs_sb)
682{
683 if (!(tcon->ses->capabilities & CAP_NT_SMBS))
684 return SMBLegacyOpen(xid, tcon, path, disposition,
25364138 685 desired_access, create_options,
fb1214e4
PS		 686 &fid->netfid, oplock, buf,
687 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags
688 & CIFS_MOUNT_MAP_SPECIAL_CHR);
689 return CIFSSMBOpen(xid, tcon, path, disposition, desired_access,
690 create_options, &fid->netfid, oplock, buf,
691 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
692 CIFS_MOUNT_MAP_SPECIAL_CHR);
693}
694
695static void
696cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
697{
698 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
699 cfile->fid.netfid = fid->netfid;
700 cifs_set_oplock_level(cinode, oplock);
701 cinode->can_cache_brlcks = cinode->clientCanCacheAll;
702}
703
760ad0ca 704static void
0ff78a22
PS		 705cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
706 struct cifs_fid *fid)
707{
760ad0ca 708 CIFSSMBClose(xid, tcon, fid->netfid);
0ff78a22
PS		 709}
710
1d8c4c00
PS		 711static int
712cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
713 struct cifs_fid *fid)
714{
715 return CIFSSMBFlush(xid, tcon, fid->netfid);
716}
717
f9c6e234
PS		 718static int
719cifs_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
720 struct cifs_io_parms *parms, unsigned int *bytes_read,
721 char **buf, int *buf_type)
722{
723 parms->netfid = cfile->fid.netfid;
724 return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
725}
726
ba9ad725
PS		 727static int
728cifs_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
729 struct cifs_io_parms *parms, unsigned int *written,
730 struct kvec *iov, unsigned long nr_segs)
731{
732
733 parms->netfid = cfile->fid.netfid;
734 return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
735}
736
6bdf6dbd
PS		 737static int
738smb_set_file_info(struct inode *inode, const char *full_path,
739 FILE_BASIC_INFO *buf, const unsigned int xid)
740{
741 int oplock = 0;
742 int rc;
743 __u16 netfid;
744 __u32 netpid;
745 struct cifsFileInfo *open_file;
746 struct cifsInodeInfo *cinode = CIFS_I(inode);
747 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
748 struct tcon_link *tlink = NULL;
749 struct cifs_tcon *tcon;
6bdf6dbd
PS		 750
751 /* if the file is already open for write, just use that fileid */
752 open_file = find_writable_file(cinode, true);
753 if (open_file) {
754 netfid = open_file->fid.netfid;
755 netpid = open_file->pid;
756 tcon = tlink_tcon(open_file->tlink);
757 goto set_via_filehandle;
758 }
759
760 tlink = cifs_sb_tlink(cifs_sb);
761 if (IS_ERR(tlink)) {
762 rc = PTR_ERR(tlink);
763 tlink = NULL;
764 goto out;
765 }
766 tcon = tlink_tcon(tlink);
767
768 /*
769 * NT4 apparently returns success on this call, but it doesn't really
770 * work.
771 */
772 if (!(tcon->ses->flags & CIFS_SES_NT4)) {
773 rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf,
774 cifs_sb->local_nls,
775 cifs_sb->mnt_cifs_flags &
776 CIFS_MOUNT_MAP_SPECIAL_CHR);
777 if (rc == 0) {
778 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
779 goto out;
780 } else if (rc != -EOPNOTSUPP && rc != -EINVAL)
781 goto out;
782 }
783
f96637be 784 cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
6bdf6dbd
PS		 785 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
786 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
787 &netfid, &oplock, NULL, cifs_sb->local_nls,
788 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
789
790 if (rc != 0) {
791 if (rc == -EIO)
792 rc = -EINVAL;
793 goto out;
794 }
795
796 netpid = current->tgid;
797
798set_via_filehandle:
c772aa92 799 rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid);
6bdf6dbd
PS		 800 if (!rc)
801 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
802
803 if (open_file == NULL)
804 CIFSSMBClose(xid, tcon, netfid);
805 else
806 cifsFileInfo_put(open_file);
807out:
808 if (tlink != NULL)
809 cifs_put_tlink(tlink);
810 return rc;
811}
812
92fc65a7
PS		 813static int
814cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
815 const char *path, struct cifs_sb_info *cifs_sb,
816 struct cifs_fid *fid, __u16 search_flags,
817 struct cifs_search_info *srch_inf)
818{
c052e2b4
SP		 819 return CIFSFindFirst(xid, tcon, path, cifs_sb,
820 &fid->netfid, search_flags, srch_inf, true);
92fc65a7
PS		 821}
822
823static int
824cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
825 struct cifs_fid *fid, __u16 search_flags,
826 struct cifs_search_info *srch_inf)
827{
828 return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
829}
830
831static int
832cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
833 struct cifs_fid *fid)
834{
835 return CIFSFindClose(xid, tcon, fid->netfid);
836}
837
95a3f2f3
PS		 838static int
839cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
840 struct cifsInodeInfo *cinode)
841{
842 return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
843 LOCKING_ANDX_OPLOCK_RELEASE, false,
844 cinode->clientCanCacheRead ? 1 : 0);
845}
846
76ec5e33
PS		 847static int
848cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
849 struct kstatfs *buf)
850{
851 int rc = -EOPNOTSUPP;
852
853 buf->f_type = CIFS_MAGIC_NUMBER;
854
855 /*
856 * We could add a second check for a QFS Unix capability bit
857 */
858 if ((tcon->ses->capabilities & CAP_UNIX) &&
859 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
860 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
861
862 /*
863 * Only need to call the old QFSInfo if failed on newer one,
864 * e.g. by OS/2.
865 **/
866 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
867 rc = CIFSSMBQFSInfo(xid, tcon, buf);
868
869 /*
870 * Some old Windows servers also do not support level 103, retry with
871 * older level one if old server failed the previous call or we
872 * bypassed it because we detected that this was an older LANMAN sess
873 */
874 if (rc)
875 rc = SMBOldQFSInfo(xid, tcon, buf);
876 return rc;
877}
878
d39a4f71
PS		 879static int
880cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
881 __u64 length, __u32 type, int lock, int unlock, bool wait)
882{
883 return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
884 current->tgid, length, offset, unlock, lock,
885 (__u8)type, wait, 0);
886}
887
922798d5
PS		 888static bool
889cifs_dir_needs_close(struct cifsFileInfo *cfile)
890{
891 return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
892}
893
4549e4af
SP		 894static bool
895cifs_can_echo(struct TCP_Server_Info *server)
896{
897 if (server->tcpStatus == CifsGood)
898 return true;
899
900 return false;
901}
902
23db65f5 903struct smb_version_operations smb1_operations = {
121b046a 904 .send_cancel = send_nt_cancel,
55157dfb 905 .compare_fids = cifs_compare_fids,
082d0642 906 .setup_request = cifs_setup_request,
45740847 907 .setup_async_request = cifs_setup_async_request,
082d0642 908 .check_receive = cifs_check_receive,
45275789
PS		 909 .add_credits = cifs_add_credits,
910 .set_credits = cifs_set_credits,
911 .get_credits_field = cifs_get_credits_field,
a891f0f8 912 .get_credits = cifs_get_credits,
88257360 913 .get_next_mid = cifs_get_next_mid,
eb378711
PS		 914 .read_data_offset = cifs_read_data_offset,
915 .read_data_length = cifs_read_data_length,
916 .map_error = map_smb_to_linux_error,
8aa26f3e
PS		 917 .find_mid = cifs_find_mid,
918 .check_message = checkSMB,
919 .dump_detail = cifs_dump_detail,
44c58186
PS		 920 .clear_stats = cifs_clear_stats,
921 .print_stats = cifs_print_stats,
8aa26f3e 922 .is_oplock_break = is_valid_oplock_break,
316cf94a 923 .check_trans2 = cifs_check_trans2,
286170aa
PS		 924 .need_neg = cifs_need_neg,
925 .negotiate = cifs_negotiate,
24985c53
PS		 926 .negotiate_wsize = cifs_negotiate_wsize,
927 .negotiate_rsize = cifs_negotiate_rsize,
58c45c58
PS		 928 .sess_setup = CIFS_SessSetup,
929 .logoff = CIFSSMBLogoff,
2e6e02ab
PS		 930 .tree_connect = CIFSTCon,
931 .tree_disconnect = CIFSSMBTDis,
b669f33c 932 .get_dfs_refer = CIFSGetDFSRefer,
af4281dc 933 .qfs_tcon = cifs_qfs_tcon,
68889f26 934 .is_path_accessible = cifs_is_path_accessible,
4549e4af 935 .can_echo = cifs_can_echo,
1208ef1f 936 .query_path_info = cifs_query_path_info,
4ad65044 937 .query_file_info = cifs_query_file_info,
1208ef1f 938 .get_srv_inum = cifs_get_srv_inum,
d1433418
PS		 939 .set_path_size = CIFSSMBSetEOF,
940 .set_file_size = CIFSSMBSetFileSize,
6bdf6dbd 941 .set_file_info = smb_set_file_info,
f6d76178 942 .echo = CIFSSMBEcho,
f436720e
PS		 943 .mkdir = CIFSSMBMkDir,
944 .mkdir_setinfo = cifs_mkdir_setinfo,
f958ca5d 945 .rmdir = CIFSSMBRmDir,
ed6875e0
PS		 946 .unlink = CIFSSMBDelFile,
947 .rename_pending_delete = cifs_rename_pending_delete,
8ceb9843 948 .rename = CIFSSMBRename,
d6e906f1 949 .create_hardlink = CIFSCreateHardLink,
fb1214e4
PS		 950 .open = cifs_open_file,
951 .set_fid = cifs_set_fid,
0ff78a22 952 .close = cifs_close_file,
1d8c4c00 953 .flush = cifs_flush_file,
fc9c5966 954 .async_readv = cifs_async_readv,
c9de5c80 955 .async_writev = cifs_async_writev,
f9c6e234 956 .sync_read = cifs_sync_read,
ba9ad725 957 .sync_write = cifs_sync_write,
92fc65a7
PS		 958 .query_dir_first = cifs_query_dir_first,
959 .query_dir_next = cifs_query_dir_next,
960 .close_dir = cifs_close_dir,
961 .calc_smb_size = smbCalcSize,
95a3f2f3 962 .oplock_response = cifs_oplock_response,
76ec5e33 963 .queryfs = cifs_queryfs,
d39a4f71
PS		 964 .mand_lock = cifs_mand_lock,
965 .mand_unlock_range = cifs_unlock_range,
966 .push_mand_locks = cifs_push_mandatory_locks,
922798d5 967 .dir_needs_close = cifs_dir_needs_close,
367d9644
SF		 968#ifdef CONFIG_CIFS_XATTR
969 .query_all_EAs = CIFSSMBQAllEAs,
970 .set_EA = CIFSSMBSetEA,
971#endif /* CIFS_XATTR */
6bd8c850
SF		 972#ifdef CONFIG_CIFS_ACL
973 .get_acl = get_cifs_acl,
974 .set_acl = set_cifs_acl,
975#endif /* CIFS_ACL */
23db65f5
JL		 976};
977
978struct smb_version_values smb1_values = {
979 .version_string = SMB1_VERSION_STRING,
106dc538
PS		 980 .large_lock_type = LOCKING_ANDX_LARGE_FILES,
981 .exclusive_lock_type = 0,
982 .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
983 .unlock_lock_type = 0,
1887f601
PS		 984 .header_size = sizeof(struct smb_hdr),
985 .max_header_size = MAX_CIFS_HDR_SIZE,
eb378711 986 .read_rsp_size = sizeof(READ_RSP),
2dc7e1c0 987 .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
29e20f9c
PS		 988 .cap_unix = CAP_UNIX,
989 .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
990 .cap_large_files = CAP_LARGE_FILES,
63b7d3a4 991 .oplock_read = OPLOCK_READ,
23db65f5 992};
kernel source for telekom puls (alcatel/mediatek)