Commit | Line | Data |
---|---|---|
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" |
2baa2682 | 26 | #include "cifs_unicode.h" |
121b046a JL |
27 | |
28 | /* | |
29 | * An NT cancel request header looks just like the original request except: | |
30 | * | |
31 | * The Command is SMB_COM_NT_CANCEL | |
32 | * The WordCount is zeroed out | |
33 | * The ByteCount is zeroed out | |
34 | * | |
35 | * This function mangles an existing request buffer into a | |
36 | * SMB_COM_NT_CANCEL request and then sends it. | |
37 | */ | |
38 | static int | |
fb2036d8 | 39 | send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst, |
121b046a JL |
40 | struct mid_q_entry *mid) |
41 | { | |
42 | int rc = 0; | |
fb2036d8 | 43 | struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base; |
121b046a JL |
44 | |
45 | /* -4 for RFC1001 length and +2 for BCC field */ | |
46 | in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2); | |
47 | in_buf->Command = SMB_COM_NT_CANCEL; | |
48 | in_buf->WordCount = 0; | |
49 | put_bcc(0, in_buf); | |
50 | ||
51 | mutex_lock(&server->srv_mutex); | |
52 | rc = cifs_sign_smb(in_buf, server, &mid->sequence_number); | |
53 | if (rc) { | |
54 | mutex_unlock(&server->srv_mutex); | |
55 | return rc; | |
56 | } | |
31efee60 JL |
57 | |
58 | /* | |
59 | * The response to this call was already factored into the sequence | |
60 | * number when the call went out, so we must adjust it back downward | |
61 | * after signing here. | |
62 | */ | |
63 | --server->sequence_number; | |
121b046a | 64 | rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); |
ad313cb8 JL |
65 | if (rc < 0) |
66 | server->sequence_number--; | |
67 | ||
121b046a JL |
68 | mutex_unlock(&server->srv_mutex); |
69 | ||
f96637be | 70 | cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n", |
3d378d3f | 71 | get_mid(in_buf), rc); |
121b046a JL |
72 | |
73 | return rc; | |
74 | } | |
23db65f5 | 75 | |
55157dfb PS |
76 | static bool |
77 | cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) | |
78 | { | |
4b4de76e | 79 | return ob1->fid.netfid == ob2->fid.netfid; |
55157dfb PS |
80 | } |
81 | ||
eb378711 PS |
82 | static unsigned int |
83 | cifs_read_data_offset(char *buf) | |
84 | { | |
85 | READ_RSP *rsp = (READ_RSP *)buf; | |
86 | return le16_to_cpu(rsp->DataOffset); | |
87 | } | |
88 | ||
89 | static unsigned int | |
74dcf418 | 90 | cifs_read_data_length(char *buf, bool in_remaining) |
eb378711 PS |
91 | { |
92 | READ_RSP *rsp = (READ_RSP *)buf; | |
74dcf418 LL |
93 | /* It's a bug reading remaining data for SMB1 packets */ |
94 | WARN_ON(in_remaining); | |
eb378711 PS |
95 | return (le16_to_cpu(rsp->DataLengthHigh) << 16) + |
96 | le16_to_cpu(rsp->DataLength); | |
97 | } | |
98 | ||
8aa26f3e PS |
99 | static struct mid_q_entry * |
100 | cifs_find_mid(struct TCP_Server_Info *server, char *buffer) | |
101 | { | |
102 | struct smb_hdr *buf = (struct smb_hdr *)buffer; | |
103 | struct mid_q_entry *mid; | |
104 | ||
105 | spin_lock(&GlobalMid_Lock); | |
106 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { | |
3d378d3f | 107 | if (compare_mid(mid->mid, buf) && |
8aa26f3e PS |
108 | mid->mid_state == MID_REQUEST_SUBMITTED && |
109 | le16_to_cpu(mid->command) == buf->Command) { | |
696e420b | 110 | kref_get(&mid->refcount); |
8aa26f3e PS |
111 | spin_unlock(&GlobalMid_Lock); |
112 | return mid; | |
113 | } | |
114 | } | |
115 | spin_unlock(&GlobalMid_Lock); | |
116 | return NULL; | |
117 | } | |
118 | ||
45275789 | 119 | static void |
a891f0f8 PS |
120 | cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add, |
121 | const int optype) | |
45275789 PS |
122 | { |
123 | spin_lock(&server->req_lock); | |
124 | server->credits += add; | |
125 | server->in_flight--; | |
126 | spin_unlock(&server->req_lock); | |
127 | wake_up(&server->request_q); | |
128 | } | |
129 | ||
130 | static void | |
131 | cifs_set_credits(struct TCP_Server_Info *server, const int val) | |
132 | { | |
133 | spin_lock(&server->req_lock); | |
134 | server->credits = val; | |
135 | server->oplocks = val > 1 ? enable_oplocks : false; | |
136 | spin_unlock(&server->req_lock); | |
137 | } | |
138 | ||
139 | static int * | |
a891f0f8 | 140 | cifs_get_credits_field(struct TCP_Server_Info *server, const int optype) |
45275789 PS |
141 | { |
142 | return &server->credits; | |
143 | } | |
144 | ||
a891f0f8 PS |
145 | static unsigned int |
146 | cifs_get_credits(struct mid_q_entry *mid) | |
147 | { | |
148 | return 1; | |
149 | } | |
150 | ||
88257360 PS |
151 | /* |
152 | * Find a free multiplex id (SMB mid). Otherwise there could be | |
153 | * mid collisions which might cause problems, demultiplexing the | |
154 | * wrong response to this request. Multiplex ids could collide if | |
155 | * one of a series requests takes much longer than the others, or | |
156 | * if a very large number of long lived requests (byte range | |
157 | * locks or FindNotify requests) are pending. No more than | |
158 | * 64K-1 requests can be outstanding at one time. If no | |
159 | * mids are available, return zero. A future optimization | |
160 | * could make the combination of mids and uid the key we use | |
161 | * to demultiplex on (rather than mid alone). | |
162 | * In addition to the above check, the cifs demultiplex | |
163 | * code already used the command code as a secondary | |
164 | * check of the frame and if signing is negotiated the | |
165 | * response would be discarded if the mid were the same | |
166 | * but the signature was wrong. Since the mid is not put in the | |
167 | * pending queue until later (when it is about to be dispatched) | |
168 | * we do have to limit the number of outstanding requests | |
169 | * to somewhat less than 64K-1 although it is hard to imagine | |
170 | * so many threads being in the vfs at one time. | |
171 | */ | |
172 | static __u64 | |
173 | cifs_get_next_mid(struct TCP_Server_Info *server) | |
174 | { | |
175 | __u64 mid = 0; | |
176 | __u16 last_mid, cur_mid; | |
177 | bool collision; | |
178 | ||
179 | spin_lock(&GlobalMid_Lock); | |
180 | ||
181 | /* mid is 16 bit only for CIFS/SMB */ | |
182 | cur_mid = (__u16)((server->CurrentMid) & 0xffff); | |
183 | /* we do not want to loop forever */ | |
184 | last_mid = cur_mid; | |
185 | cur_mid++; | |
186 | ||
187 | /* | |
188 | * This nested loop looks more expensive than it is. | |
189 | * In practice the list of pending requests is short, | |
190 | * fewer than 50, and the mids are likely to be unique | |
191 | * on the first pass through the loop unless some request | |
192 | * takes longer than the 64 thousand requests before it | |
193 | * (and it would also have to have been a request that | |
194 | * did not time out). | |
195 | */ | |
196 | while (cur_mid != last_mid) { | |
197 | struct mid_q_entry *mid_entry; | |
198 | unsigned int num_mids; | |
199 | ||
200 | collision = false; | |
201 | if (cur_mid == 0) | |
202 | cur_mid++; | |
203 | ||
204 | num_mids = 0; | |
205 | list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { | |
206 | ++num_mids; | |
207 | if (mid_entry->mid == cur_mid && | |
208 | mid_entry->mid_state == MID_REQUEST_SUBMITTED) { | |
209 | /* This mid is in use, try a different one */ | |
210 | collision = true; | |
211 | break; | |
212 | } | |
213 | } | |
214 | ||
215 | /* | |
216 | * if we have more than 32k mids in the list, then something | |
217 | * is very wrong. Possibly a local user is trying to DoS the | |
218 | * box by issuing long-running calls and SIGKILL'ing them. If | |
219 | * we get to 2^16 mids then we're in big trouble as this | |
220 | * function could loop forever. | |
221 | * | |
222 | * Go ahead and assign out the mid in this situation, but force | |
223 | * an eventual reconnect to clean out the pending_mid_q. | |
224 | */ | |
225 | if (num_mids > 32768) | |
226 | server->tcpStatus = CifsNeedReconnect; | |
227 | ||
228 | if (!collision) { | |
229 | mid = (__u64)cur_mid; | |
230 | server->CurrentMid = mid; | |
231 | break; | |
232 | } | |
233 | cur_mid++; | |
234 | } | |
235 | spin_unlock(&GlobalMid_Lock); | |
236 | return mid; | |
237 | } | |
238 | ||
316cf94a PS |
239 | /* |
240 | return codes: | |
241 | 0 not a transact2, or all data present | |
242 | >0 transact2 with that much data missing | |
243 | -EINVAL invalid transact2 | |
244 | */ | |
245 | static int | |
246 | check2ndT2(char *buf) | |
247 | { | |
248 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; | |
249 | struct smb_t2_rsp *pSMBt; | |
250 | int remaining; | |
251 | __u16 total_data_size, data_in_this_rsp; | |
252 | ||
253 | if (pSMB->Command != SMB_COM_TRANSACTION2) | |
254 | return 0; | |
255 | ||
256 | /* check for plausible wct, bcc and t2 data and parm sizes */ | |
257 | /* check for parm and data offset going beyond end of smb */ | |
258 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
f96637be | 259 | cifs_dbg(FYI, "invalid transact2 word count\n"); |
316cf94a PS |
260 | return -EINVAL; |
261 | } | |
262 | ||
263 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
264 | ||
265 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
266 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
267 | ||
268 | if (total_data_size == data_in_this_rsp) | |
269 | return 0; | |
270 | else if (total_data_size < data_in_this_rsp) { | |
f96637be JP |
271 | cifs_dbg(FYI, "total data %d smaller than data in frame %d\n", |
272 | total_data_size, data_in_this_rsp); | |
316cf94a PS |
273 | return -EINVAL; |
274 | } | |
275 | ||
276 | remaining = total_data_size - data_in_this_rsp; | |
277 | ||
f96637be JP |
278 | cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n", |
279 | remaining); | |
316cf94a | 280 | if (total_data_size > CIFSMaxBufSize) { |
f96637be JP |
281 | cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n", |
282 | total_data_size, CIFSMaxBufSize); | |
316cf94a PS |
283 | return -EINVAL; |
284 | } | |
285 | return remaining; | |
286 | } | |
287 | ||
288 | static int | |
289 | coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) | |
290 | { | |
291 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; | |
292 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
293 | char *data_area_of_tgt; | |
294 | char *data_area_of_src; | |
295 | int remaining; | |
296 | unsigned int byte_count, total_in_tgt; | |
297 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
298 | ||
299 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); | |
300 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
301 | ||
302 | if (tgt_total_cnt != src_total_cnt) | |
f96637be JP |
303 | cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n", |
304 | src_total_cnt, tgt_total_cnt); | |
316cf94a PS |
305 | |
306 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
307 | ||
308 | remaining = tgt_total_cnt - total_in_tgt; | |
309 | ||
310 | if (remaining < 0) { | |
f96637be JP |
311 | cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n", |
312 | tgt_total_cnt, total_in_tgt); | |
316cf94a PS |
313 | return -EPROTO; |
314 | } | |
315 | ||
316 | if (remaining == 0) { | |
317 | /* nothing to do, ignore */ | |
f96637be | 318 | cifs_dbg(FYI, "no more data remains\n"); |
316cf94a PS |
319 | return 0; |
320 | } | |
321 | ||
322 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); | |
323 | if (remaining < total_in_src) | |
f96637be | 324 | cifs_dbg(FYI, "transact2 2nd response contains too much data\n"); |
316cf94a PS |
325 | |
326 | /* find end of first SMB data area */ | |
327 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + | |
328 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); | |
329 | ||
330 | /* validate target area */ | |
331 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
332 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
333 | ||
334 | data_area_of_tgt += total_in_tgt; | |
335 | ||
336 | total_in_tgt += total_in_src; | |
337 | /* is the result too big for the field? */ | |
338 | if (total_in_tgt > USHRT_MAX) { | |
f96637be JP |
339 | cifs_dbg(FYI, "coalesced DataCount too large (%u)\n", |
340 | total_in_tgt); | |
316cf94a PS |
341 | return -EPROTO; |
342 | } | |
343 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
344 | ||
345 | /* fix up the BCC */ | |
346 | byte_count = get_bcc(target_hdr); | |
347 | byte_count += total_in_src; | |
348 | /* is the result too big for the field? */ | |
349 | if (byte_count > USHRT_MAX) { | |
f96637be | 350 | cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count); |
316cf94a PS |
351 | return -EPROTO; |
352 | } | |
353 | put_bcc(byte_count, target_hdr); | |
354 | ||
355 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); | |
356 | byte_count += total_in_src; | |
357 | /* don't allow buffer to overflow */ | |
358 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
f96637be JP |
359 | cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n", |
360 | byte_count); | |
316cf94a PS |
361 | return -ENOBUFS; |
362 | } | |
363 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); | |
364 | ||
365 | /* copy second buffer into end of first buffer */ | |
366 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
367 | ||
368 | if (remaining != total_in_src) { | |
369 | /* more responses to go */ | |
f96637be | 370 | cifs_dbg(FYI, "waiting for more secondary responses\n"); |
316cf94a PS |
371 | return 1; |
372 | } | |
373 | ||
374 | /* we are done */ | |
f96637be | 375 | cifs_dbg(FYI, "found the last secondary response\n"); |
316cf94a PS |
376 | return 0; |
377 | } | |
378 | ||
c11f1df5 SP |
379 | static void |
380 | cifs_downgrade_oplock(struct TCP_Server_Info *server, | |
381 | struct cifsInodeInfo *cinode, bool set_level2) | |
382 | { | |
383 | if (set_level2) | |
384 | cifs_set_oplock_level(cinode, OPLOCK_READ); | |
385 | else | |
386 | cifs_set_oplock_level(cinode, 0); | |
387 | } | |
388 | ||
316cf94a PS |
389 | static bool |
390 | cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
391 | char *buf, int malformed) | |
392 | { | |
393 | if (malformed) | |
394 | return false; | |
395 | if (check2ndT2(buf) <= 0) | |
396 | return false; | |
397 | mid->multiRsp = true; | |
398 | if (mid->resp_buf) { | |
399 | /* merge response - fix up 1st*/ | |
400 | malformed = coalesce_t2(buf, mid->resp_buf); | |
401 | if (malformed > 0) | |
402 | return true; | |
403 | /* All parts received or packet is malformed. */ | |
404 | mid->multiEnd = true; | |
405 | dequeue_mid(mid, malformed); | |
406 | return true; | |
407 | } | |
408 | if (!server->large_buf) { | |
409 | /*FIXME: switch to already allocated largebuf?*/ | |
f96637be | 410 | cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n"); |
316cf94a PS |
411 | } else { |
412 | /* Have first buffer */ | |
413 | mid->resp_buf = buf; | |
414 | mid->large_buf = true; | |
415 | server->bigbuf = NULL; | |
416 | } | |
417 | return true; | |
418 | } | |
419 | ||
286170aa PS |
420 | static bool |
421 | cifs_need_neg(struct TCP_Server_Info *server) | |
422 | { | |
423 | return server->maxBuf == 0; | |
424 | } | |
425 | ||
426 | static int | |
427 | cifs_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
428 | { | |
429 | int rc; | |
430 | rc = CIFSSMBNegotiate(xid, ses); | |
431 | if (rc == -EAGAIN) { | |
432 | /* retry only once on 1st time connection */ | |
433 | set_credits(ses->server, 1); | |
434 | rc = CIFSSMBNegotiate(xid, ses); | |
435 | if (rc == -EAGAIN) | |
436 | rc = -EHOSTDOWN; | |
437 | } | |
438 | return rc; | |
439 | } | |
440 | ||
24985c53 PS |
441 | static unsigned int |
442 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
443 | { | |
444 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
445 | struct TCP_Server_Info *server = tcon->ses->server; | |
446 | unsigned int wsize; | |
447 | ||
448 | /* start with specified wsize, or default */ | |
449 | if (volume_info->wsize) | |
450 | wsize = volume_info->wsize; | |
451 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
452 | wsize = CIFS_DEFAULT_IOSIZE; | |
453 | else | |
454 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
455 | ||
456 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
457 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
458 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); | |
459 | ||
460 | /* | |
461 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
462 | * Limit it to max buffer offered by the server, minus the size of the | |
463 | * WRITEX header, not including the 4 byte RFC1001 length. | |
464 | */ | |
465 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
38d77c50 | 466 | (!(server->capabilities & CAP_UNIX) && server->sign)) |
24985c53 PS |
467 | wsize = min_t(unsigned int, wsize, |
468 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
469 | ||
24985c53 PS |
470 | /* hard limit of CIFS_MAX_WSIZE */ |
471 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
472 | ||
473 | return wsize; | |
474 | } | |
475 | ||
476 | static unsigned int | |
477 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
478 | { | |
479 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
480 | struct TCP_Server_Info *server = tcon->ses->server; | |
481 | unsigned int rsize, defsize; | |
482 | ||
483 | /* | |
484 | * Set default value... | |
485 | * | |
486 | * HACK alert! Ancient servers have very small buffers. Even though | |
487 | * MS-CIFS indicates that servers are only limited by the client's | |
488 | * bufsize for reads, testing against win98se shows that it throws | |
489 | * INVALID_PARAMETER errors if you try to request too large a read. | |
490 | * OS/2 just sends back short reads. | |
491 | * | |
492 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that | |
493 | * it can't handle a read request larger than its MaxBufferSize either. | |
494 | */ | |
495 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
496 | defsize = CIFS_DEFAULT_IOSIZE; | |
497 | else if (server->capabilities & CAP_LARGE_READ_X) | |
498 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
499 | else | |
500 | defsize = server->maxBuf - sizeof(READ_RSP); | |
501 | ||
502 | rsize = volume_info->rsize ? volume_info->rsize : defsize; | |
503 | ||
504 | /* | |
505 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
506 | * the client's MaxBufferSize. | |
507 | */ | |
508 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
509 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
510 | ||
24985c53 PS |
511 | /* hard limit of CIFS_MAX_RSIZE */ |
512 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
513 | ||
514 | return rsize; | |
515 | } | |
516 | ||
af4281dc PS |
517 | static void |
518 | cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) | |
519 | { | |
520 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
521 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
522 | } | |
523 | ||
68889f26 PS |
524 | static int |
525 | cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, | |
526 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
527 | { | |
528 | int rc; | |
529 | FILE_ALL_INFO *file_info; | |
530 | ||
531 | file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
532 | if (file_info == NULL) | |
533 | return -ENOMEM; | |
534 | ||
535 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info, | |
536 | 0 /* not legacy */, cifs_sb->local_nls, | |
2baa2682 | 537 | cifs_remap(cifs_sb)); |
68889f26 PS |
538 | |
539 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
540 | rc = SMBQueryInformation(xid, tcon, full_path, file_info, | |
2baa2682 | 541 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
68889f26 PS |
542 | kfree(file_info); |
543 | return rc; | |
544 | } | |
545 | ||
1208ef1f PS |
546 | static int |
547 | cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, | |
548 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
eb85d94b | 549 | FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink) |
1208ef1f PS |
550 | { |
551 | int rc; | |
552 | ||
eb85d94b PS |
553 | *symlink = false; |
554 | ||
1208ef1f PS |
555 | /* could do find first instead but this returns more info */ |
556 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, | |
2baa2682 | 557 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
1208ef1f PS |
558 | /* |
559 | * BB optimize code so we do not make the above call when server claims | |
560 | * no NT SMB support and the above call failed at least once - set flag | |
561 | * in tcon or mount. | |
562 | */ | |
563 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { | |
564 | rc = SMBQueryInformation(xid, tcon, full_path, data, | |
565 | cifs_sb->local_nls, | |
2baa2682 | 566 | cifs_remap(cifs_sb)); |
1208ef1f PS |
567 | *adjustTZ = true; |
568 | } | |
eb85d94b PS |
569 | |
570 | if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) { | |
571 | int tmprc; | |
572 | int oplock = 0; | |
d81b8a40 PS |
573 | struct cifs_fid fid; |
574 | struct cifs_open_parms oparms; | |
575 | ||
576 | oparms.tcon = tcon; | |
577 | oparms.cifs_sb = cifs_sb; | |
578 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
579 | oparms.create_options = 0; | |
580 | oparms.disposition = FILE_OPEN; | |
581 | oparms.path = full_path; | |
582 | oparms.fid = &fid; | |
583 | oparms.reconnect = false; | |
eb85d94b PS |
584 | |
585 | /* Need to check if this is a symbolic link or not */ | |
d81b8a40 | 586 | tmprc = CIFS_open(xid, &oparms, &oplock, NULL); |
eb85d94b PS |
587 | if (tmprc == -EOPNOTSUPP) |
588 | *symlink = true; | |
19e81573 | 589 | else if (tmprc == 0) |
d81b8a40 | 590 | CIFSSMBClose(xid, tcon, fid.netfid); |
eb85d94b PS |
591 | } |
592 | ||
1208ef1f PS |
593 | return rc; |
594 | } | |
595 | ||
596 | static int | |
597 | cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, | |
598 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
599 | u64 *uniqueid, FILE_ALL_INFO *data) | |
600 | { | |
601 | /* | |
602 | * We can not use the IndexNumber field by default from Windows or | |
603 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
604 | * CIFS spec claims that this value is unique within the scope of a | |
605 | * share, and the windows docs hint that it's actually unique | |
606 | * per-machine. | |
607 | * | |
608 | * There may be higher info levels that work but are there Windows | |
609 | * server or network appliances for which IndexNumber field is not | |
610 | * guaranteed unique? | |
611 | */ | |
612 | return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid, | |
613 | cifs_sb->local_nls, | |
2baa2682 | 614 | cifs_remap(cifs_sb)); |
1208ef1f PS |
615 | } |
616 | ||
4ad65044 PS |
617 | static int |
618 | cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, | |
619 | struct cifs_fid *fid, FILE_ALL_INFO *data) | |
620 | { | |
621 | return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); | |
622 | } | |
623 | ||
44c58186 PS |
624 | static void |
625 | cifs_clear_stats(struct cifs_tcon *tcon) | |
626 | { | |
44c58186 PS |
627 | atomic_set(&tcon->stats.cifs_stats.num_writes, 0); |
628 | atomic_set(&tcon->stats.cifs_stats.num_reads, 0); | |
629 | atomic_set(&tcon->stats.cifs_stats.num_flushes, 0); | |
630 | atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0); | |
631 | atomic_set(&tcon->stats.cifs_stats.num_opens, 0); | |
632 | atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0); | |
633 | atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0); | |
634 | atomic_set(&tcon->stats.cifs_stats.num_closes, 0); | |
635 | atomic_set(&tcon->stats.cifs_stats.num_deletes, 0); | |
636 | atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0); | |
637 | atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0); | |
638 | atomic_set(&tcon->stats.cifs_stats.num_renames, 0); | |
639 | atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0); | |
640 | atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0); | |
641 | atomic_set(&tcon->stats.cifs_stats.num_fnext, 0); | |
642 | atomic_set(&tcon->stats.cifs_stats.num_fclose, 0); | |
643 | atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0); | |
644 | atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0); | |
645 | atomic_set(&tcon->stats.cifs_stats.num_locks, 0); | |
646 | atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0); | |
647 | atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0); | |
44c58186 PS |
648 | } |
649 | ||
650 | static void | |
651 | cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon) | |
652 | { | |
44c58186 PS |
653 | seq_printf(m, " Oplocks breaks: %d", |
654 | atomic_read(&tcon->stats.cifs_stats.num_oplock_brks)); | |
655 | seq_printf(m, "\nReads: %d Bytes: %llu", | |
656 | atomic_read(&tcon->stats.cifs_stats.num_reads), | |
657 | (long long)(tcon->bytes_read)); | |
658 | seq_printf(m, "\nWrites: %d Bytes: %llu", | |
659 | atomic_read(&tcon->stats.cifs_stats.num_writes), | |
660 | (long long)(tcon->bytes_written)); | |
661 | seq_printf(m, "\nFlushes: %d", | |
662 | atomic_read(&tcon->stats.cifs_stats.num_flushes)); | |
663 | seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d", | |
664 | atomic_read(&tcon->stats.cifs_stats.num_locks), | |
665 | atomic_read(&tcon->stats.cifs_stats.num_hardlinks), | |
666 | atomic_read(&tcon->stats.cifs_stats.num_symlinks)); | |
667 | seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d", | |
668 | atomic_read(&tcon->stats.cifs_stats.num_opens), | |
669 | atomic_read(&tcon->stats.cifs_stats.num_closes), | |
670 | atomic_read(&tcon->stats.cifs_stats.num_deletes)); | |
671 | seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d", | |
672 | atomic_read(&tcon->stats.cifs_stats.num_posixopens), | |
673 | atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs)); | |
674 | seq_printf(m, "\nMkdirs: %d Rmdirs: %d", | |
675 | atomic_read(&tcon->stats.cifs_stats.num_mkdirs), | |
676 | atomic_read(&tcon->stats.cifs_stats.num_rmdirs)); | |
677 | seq_printf(m, "\nRenames: %d T2 Renames %d", | |
678 | atomic_read(&tcon->stats.cifs_stats.num_renames), | |
679 | atomic_read(&tcon->stats.cifs_stats.num_t2renames)); | |
680 | seq_printf(m, "\nFindFirst: %d FNext %d FClose %d", | |
681 | atomic_read(&tcon->stats.cifs_stats.num_ffirst), | |
682 | atomic_read(&tcon->stats.cifs_stats.num_fnext), | |
683 | atomic_read(&tcon->stats.cifs_stats.num_fclose)); | |
44c58186 PS |
684 | } |
685 | ||
f436720e PS |
686 | static void |
687 | cifs_mkdir_setinfo(struct inode *inode, const char *full_path, | |
688 | struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, | |
689 | const unsigned int xid) | |
690 | { | |
691 | FILE_BASIC_INFO info; | |
692 | struct cifsInodeInfo *cifsInode; | |
693 | u32 dosattrs; | |
694 | int rc; | |
695 | ||
696 | memset(&info, 0, sizeof(info)); | |
697 | cifsInode = CIFS_I(inode); | |
698 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
699 | info.Attributes = cpu_to_le32(dosattrs); | |
700 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls, | |
2baa2682 | 701 | cifs_remap(cifs_sb)); |
f436720e PS |
702 | if (rc == 0) |
703 | cifsInode->cifsAttrs = dosattrs; | |
704 | } | |
705 | ||
fb1214e4 | 706 | static int |
226730b4 PS |
707 | cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms, |
708 | __u32 *oplock, FILE_ALL_INFO *buf) | |
fb1214e4 | 709 | { |
226730b4 PS |
710 | if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS)) |
711 | return SMBLegacyOpen(xid, oparms->tcon, oparms->path, | |
712 | oparms->disposition, | |
713 | oparms->desired_access, | |
714 | oparms->create_options, | |
715 | &oparms->fid->netfid, oplock, buf, | |
716 | oparms->cifs_sb->local_nls, | |
2baa2682 | 717 | cifs_remap(oparms->cifs_sb)); |
d81b8a40 | 718 | return CIFS_open(xid, oparms, oplock, buf); |
fb1214e4 PS |
719 | } |
720 | ||
721 | static void | |
722 | cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) | |
723 | { | |
2b0143b5 | 724 | struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); |
fb1214e4 PS |
725 | cfile->fid.netfid = fid->netfid; |
726 | cifs_set_oplock_level(cinode, oplock); | |
18cceb6a | 727 | cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); |
fb1214e4 PS |
728 | } |
729 | ||
760ad0ca | 730 | static void |
0ff78a22 PS |
731 | cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon, |
732 | struct cifs_fid *fid) | |
733 | { | |
760ad0ca | 734 | CIFSSMBClose(xid, tcon, fid->netfid); |
0ff78a22 PS |
735 | } |
736 | ||
1d8c4c00 PS |
737 | static int |
738 | cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon, | |
739 | struct cifs_fid *fid) | |
740 | { | |
741 | return CIFSSMBFlush(xid, tcon, fid->netfid); | |
742 | } | |
743 | ||
f9c6e234 | 744 | static int |
db8b631d | 745 | cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid, |
f9c6e234 PS |
746 | struct cifs_io_parms *parms, unsigned int *bytes_read, |
747 | char **buf, int *buf_type) | |
748 | { | |
db8b631d | 749 | parms->netfid = pfid->netfid; |
f9c6e234 PS |
750 | return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type); |
751 | } | |
752 | ||
ba9ad725 | 753 | static int |
db8b631d | 754 | cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid, |
ba9ad725 PS |
755 | struct cifs_io_parms *parms, unsigned int *written, |
756 | struct kvec *iov, unsigned long nr_segs) | |
757 | { | |
758 | ||
db8b631d | 759 | parms->netfid = pfid->netfid; |
ba9ad725 PS |
760 | return CIFSSMBWrite2(xid, parms, written, iov, nr_segs); |
761 | } | |
762 | ||
6bdf6dbd PS |
763 | static int |
764 | smb_set_file_info(struct inode *inode, const char *full_path, | |
765 | FILE_BASIC_INFO *buf, const unsigned int xid) | |
766 | { | |
767 | int oplock = 0; | |
768 | int rc; | |
6bdf6dbd | 769 | __u32 netpid; |
d81b8a40 PS |
770 | struct cifs_fid fid; |
771 | struct cifs_open_parms oparms; | |
6bdf6dbd PS |
772 | struct cifsFileInfo *open_file; |
773 | struct cifsInodeInfo *cinode = CIFS_I(inode); | |
774 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
775 | struct tcon_link *tlink = NULL; | |
776 | struct cifs_tcon *tcon; | |
6bdf6dbd PS |
777 | |
778 | /* if the file is already open for write, just use that fileid */ | |
779 | open_file = find_writable_file(cinode, true); | |
780 | if (open_file) { | |
d81b8a40 | 781 | fid.netfid = open_file->fid.netfid; |
6bdf6dbd PS |
782 | netpid = open_file->pid; |
783 | tcon = tlink_tcon(open_file->tlink); | |
784 | goto set_via_filehandle; | |
785 | } | |
786 | ||
787 | tlink = cifs_sb_tlink(cifs_sb); | |
788 | if (IS_ERR(tlink)) { | |
789 | rc = PTR_ERR(tlink); | |
790 | tlink = NULL; | |
791 | goto out; | |
792 | } | |
793 | tcon = tlink_tcon(tlink); | |
794 | ||
281e2e7d | 795 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls, |
2baa2682 | 796 | cifs_remap(cifs_sb)); |
281e2e7d JL |
797 | if (rc == 0) { |
798 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
799 | goto out; | |
800 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) { | |
801 | goto out; | |
6bdf6dbd PS |
802 | } |
803 | ||
d81b8a40 PS |
804 | oparms.tcon = tcon; |
805 | oparms.cifs_sb = cifs_sb; | |
806 | oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES; | |
807 | oparms.create_options = CREATE_NOT_DIR; | |
808 | oparms.disposition = FILE_OPEN; | |
809 | oparms.path = full_path; | |
810 | oparms.fid = &fid; | |
811 | oparms.reconnect = false; | |
6bdf6dbd | 812 | |
d81b8a40 PS |
813 | cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n"); |
814 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
6bdf6dbd PS |
815 | if (rc != 0) { |
816 | if (rc == -EIO) | |
817 | rc = -EINVAL; | |
818 | goto out; | |
819 | } | |
820 | ||
821 | netpid = current->tgid; | |
822 | ||
823 | set_via_filehandle: | |
d81b8a40 | 824 | rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid); |
6bdf6dbd PS |
825 | if (!rc) |
826 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
827 | ||
828 | if (open_file == NULL) | |
d81b8a40 | 829 | CIFSSMBClose(xid, tcon, fid.netfid); |
6bdf6dbd PS |
830 | else |
831 | cifsFileInfo_put(open_file); | |
832 | out: | |
833 | if (tlink != NULL) | |
834 | cifs_put_tlink(tlink); | |
835 | return rc; | |
836 | } | |
837 | ||
c7f508a9 SF |
838 | static int |
839 | cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
840 | struct cifsFileInfo *cfile) | |
841 | { | |
842 | return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid); | |
843 | } | |
844 | ||
92fc65a7 PS |
845 | static int |
846 | cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, | |
847 | const char *path, struct cifs_sb_info *cifs_sb, | |
848 | struct cifs_fid *fid, __u16 search_flags, | |
849 | struct cifs_search_info *srch_inf) | |
850 | { | |
dcd87838 PS |
851 | int rc; |
852 | ||
853 | rc = CIFSFindFirst(xid, tcon, path, cifs_sb, | |
854 | &fid->netfid, search_flags, srch_inf, true); | |
855 | if (rc) | |
856 | cifs_dbg(FYI, "find first failed=%d\n", rc); | |
857 | return rc; | |
92fc65a7 PS |
858 | } |
859 | ||
860 | static int | |
861 | cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, | |
862 | struct cifs_fid *fid, __u16 search_flags, | |
863 | struct cifs_search_info *srch_inf) | |
864 | { | |
865 | return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf); | |
866 | } | |
867 | ||
868 | static int | |
869 | cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon, | |
870 | struct cifs_fid *fid) | |
871 | { | |
872 | return CIFSFindClose(xid, tcon, fid->netfid); | |
873 | } | |
874 | ||
95a3f2f3 PS |
875 | static int |
876 | cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, | |
877 | struct cifsInodeInfo *cinode) | |
878 | { | |
879 | return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0, | |
880 | LOCKING_ANDX_OPLOCK_RELEASE, false, | |
18cceb6a | 881 | CIFS_CACHE_READ(cinode) ? 1 : 0); |
95a3f2f3 PS |
882 | } |
883 | ||
76ec5e33 PS |
884 | static int |
885 | cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon, | |
886 | struct kstatfs *buf) | |
887 | { | |
888 | int rc = -EOPNOTSUPP; | |
889 | ||
890 | buf->f_type = CIFS_MAGIC_NUMBER; | |
891 | ||
892 | /* | |
893 | * We could add a second check for a QFS Unix capability bit | |
894 | */ | |
895 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
896 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
897 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
898 | ||
899 | /* | |
900 | * Only need to call the old QFSInfo if failed on newer one, | |
901 | * e.g. by OS/2. | |
902 | **/ | |
903 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
904 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
905 | ||
906 | /* | |
907 | * Some old Windows servers also do not support level 103, retry with | |
908 | * older level one if old server failed the previous call or we | |
909 | * bypassed it because we detected that this was an older LANMAN sess | |
910 | */ | |
911 | if (rc) | |
912 | rc = SMBOldQFSInfo(xid, tcon, buf); | |
913 | return rc; | |
914 | } | |
915 | ||
d39a4f71 PS |
916 | static int |
917 | cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, | |
918 | __u64 length, __u32 type, int lock, int unlock, bool wait) | |
919 | { | |
920 | return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid, | |
921 | current->tgid, length, offset, unlock, lock, | |
922 | (__u8)type, wait, 0); | |
923 | } | |
924 | ||
924e3fa4 SP |
925 | static int |
926 | cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon, | |
927 | const unsigned char *searchName, char **symlinkinfo, | |
928 | const struct nls_table *nls_codepage) | |
929 | { | |
930 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
931 | int rc; | |
932 | unsigned int num_referrals = 0; | |
933 | struct dfs_info3_param *referrals = NULL; | |
934 | ||
935 | rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, | |
936 | &num_referrals, &referrals, 0); | |
937 | ||
938 | if (!rc && num_referrals > 0) { | |
939 | *symlinkinfo = kstrndup(referrals->node_name, | |
940 | strlen(referrals->node_name), | |
941 | GFP_KERNEL); | |
942 | if (!*symlinkinfo) | |
943 | rc = -ENOMEM; | |
944 | free_dfs_info_array(referrals, num_referrals); | |
945 | } | |
946 | return rc; | |
947 | #else /* No DFS support */ | |
948 | return -EREMOTE; | |
949 | #endif | |
950 | } | |
951 | ||
d244bf2d PS |
952 | static int |
953 | cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, | |
954 | const char *full_path, char **target_path, | |
955 | struct cifs_sb_info *cifs_sb) | |
956 | { | |
957 | int rc; | |
958 | int oplock = 0; | |
d81b8a40 PS |
959 | struct cifs_fid fid; |
960 | struct cifs_open_parms oparms; | |
d244bf2d PS |
961 | |
962 | cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); | |
963 | ||
0ecdb4f5 SP |
964 | /* Check for unix extensions */ |
965 | if (cap_unix(tcon->ses)) { | |
966 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path, | |
bc8ebdc4 NA |
967 | cifs_sb->local_nls, |
968 | cifs_remap(cifs_sb)); | |
924e3fa4 SP |
969 | if (rc == -EREMOTE) |
970 | rc = cifs_unix_dfs_readlink(xid, tcon, full_path, | |
971 | target_path, | |
972 | cifs_sb->local_nls); | |
973 | ||
0ecdb4f5 SP |
974 | goto out; |
975 | } | |
976 | ||
d81b8a40 PS |
977 | oparms.tcon = tcon; |
978 | oparms.cifs_sb = cifs_sb; | |
979 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
980 | oparms.create_options = OPEN_REPARSE_POINT; | |
981 | oparms.disposition = FILE_OPEN; | |
982 | oparms.path = full_path; | |
983 | oparms.fid = &fid; | |
984 | oparms.reconnect = false; | |
985 | ||
986 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
d244bf2d | 987 | if (rc) |
0ecdb4f5 | 988 | goto out; |
d244bf2d | 989 | |
d81b8a40 | 990 | rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path, |
d244bf2d | 991 | cifs_sb->local_nls); |
0ecdb4f5 SP |
992 | if (rc) |
993 | goto out_close; | |
d244bf2d PS |
994 | |
995 | convert_delimiter(*target_path, '/'); | |
0ecdb4f5 | 996 | out_close: |
d81b8a40 | 997 | CIFSSMBClose(xid, tcon, fid.netfid); |
0ecdb4f5 SP |
998 | out: |
999 | if (!rc) | |
1000 | cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); | |
d244bf2d PS |
1001 | return rc; |
1002 | } | |
1003 | ||
53ef1016 PS |
1004 | static bool |
1005 | cifs_is_read_op(__u32 oplock) | |
1006 | { | |
1007 | return oplock == OPLOCK_READ; | |
1008 | } | |
1009 | ||
7f6c5008 PS |
1010 | static unsigned int |
1011 | cifs_wp_retry_size(struct inode *inode) | |
1012 | { | |
1013 | return CIFS_SB(inode->i_sb)->wsize; | |
1014 | } | |
1015 | ||
52755808 PS |
1016 | static bool |
1017 | cifs_dir_needs_close(struct cifsFileInfo *cfile) | |
1018 | { | |
1019 | return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle; | |
1020 | } | |
1021 | ||
62a6cfdd SP |
1022 | static bool |
1023 | cifs_can_echo(struct TCP_Server_Info *server) | |
1024 | { | |
1025 | if (server->tcpStatus == CifsGood) | |
1026 | return true; | |
1027 | ||
1028 | return false; | |
1029 | } | |
1030 | ||
23db65f5 | 1031 | struct smb_version_operations smb1_operations = { |
121b046a | 1032 | .send_cancel = send_nt_cancel, |
55157dfb | 1033 | .compare_fids = cifs_compare_fids, |
082d0642 | 1034 | .setup_request = cifs_setup_request, |
45740847 | 1035 | .setup_async_request = cifs_setup_async_request, |
082d0642 | 1036 | .check_receive = cifs_check_receive, |
45275789 PS |
1037 | .add_credits = cifs_add_credits, |
1038 | .set_credits = cifs_set_credits, | |
1039 | .get_credits_field = cifs_get_credits_field, | |
a891f0f8 | 1040 | .get_credits = cifs_get_credits, |
cb7e9eab | 1041 | .wait_mtu_credits = cifs_wait_mtu_credits, |
88257360 | 1042 | .get_next_mid = cifs_get_next_mid, |
eb378711 PS |
1043 | .read_data_offset = cifs_read_data_offset, |
1044 | .read_data_length = cifs_read_data_length, | |
1045 | .map_error = map_smb_to_linux_error, | |
8aa26f3e PS |
1046 | .find_mid = cifs_find_mid, |
1047 | .check_message = checkSMB, | |
1048 | .dump_detail = cifs_dump_detail, | |
44c58186 PS |
1049 | .clear_stats = cifs_clear_stats, |
1050 | .print_stats = cifs_print_stats, | |
8aa26f3e | 1051 | .is_oplock_break = is_valid_oplock_break, |
c11f1df5 | 1052 | .downgrade_oplock = cifs_downgrade_oplock, |
316cf94a | 1053 | .check_trans2 = cifs_check_trans2, |
286170aa PS |
1054 | .need_neg = cifs_need_neg, |
1055 | .negotiate = cifs_negotiate, | |
24985c53 PS |
1056 | .negotiate_wsize = cifs_negotiate_wsize, |
1057 | .negotiate_rsize = cifs_negotiate_rsize, | |
58c45c58 PS |
1058 | .sess_setup = CIFS_SessSetup, |
1059 | .logoff = CIFSSMBLogoff, | |
2e6e02ab PS |
1060 | .tree_connect = CIFSTCon, |
1061 | .tree_disconnect = CIFSSMBTDis, | |
b669f33c | 1062 | .get_dfs_refer = CIFSGetDFSRefer, |
af4281dc | 1063 | .qfs_tcon = cifs_qfs_tcon, |
68889f26 | 1064 | .is_path_accessible = cifs_is_path_accessible, |
62a6cfdd | 1065 | .can_echo = cifs_can_echo, |
1208ef1f | 1066 | .query_path_info = cifs_query_path_info, |
4ad65044 | 1067 | .query_file_info = cifs_query_file_info, |
1208ef1f | 1068 | .get_srv_inum = cifs_get_srv_inum, |
d1433418 PS |
1069 | .set_path_size = CIFSSMBSetEOF, |
1070 | .set_file_size = CIFSSMBSetFileSize, | |
6bdf6dbd | 1071 | .set_file_info = smb_set_file_info, |
c7f508a9 | 1072 | .set_compression = cifs_set_compression, |
f6d76178 | 1073 | .echo = CIFSSMBEcho, |
f436720e PS |
1074 | .mkdir = CIFSSMBMkDir, |
1075 | .mkdir_setinfo = cifs_mkdir_setinfo, | |
f958ca5d | 1076 | .rmdir = CIFSSMBRmDir, |
ed6875e0 PS |
1077 | .unlink = CIFSSMBDelFile, |
1078 | .rename_pending_delete = cifs_rename_pending_delete, | |
8ceb9843 | 1079 | .rename = CIFSSMBRename, |
d6e906f1 | 1080 | .create_hardlink = CIFSCreateHardLink, |
d244bf2d | 1081 | .query_symlink = cifs_query_symlink, |
fb1214e4 PS |
1082 | .open = cifs_open_file, |
1083 | .set_fid = cifs_set_fid, | |
0ff78a22 | 1084 | .close = cifs_close_file, |
1d8c4c00 | 1085 | .flush = cifs_flush_file, |
fc9c5966 | 1086 | .async_readv = cifs_async_readv, |
c9de5c80 | 1087 | .async_writev = cifs_async_writev, |
f9c6e234 | 1088 | .sync_read = cifs_sync_read, |
ba9ad725 | 1089 | .sync_write = cifs_sync_write, |
92fc65a7 PS |
1090 | .query_dir_first = cifs_query_dir_first, |
1091 | .query_dir_next = cifs_query_dir_next, | |
1092 | .close_dir = cifs_close_dir, | |
1093 | .calc_smb_size = smbCalcSize, | |
95a3f2f3 | 1094 | .oplock_response = cifs_oplock_response, |
76ec5e33 | 1095 | .queryfs = cifs_queryfs, |
d39a4f71 PS |
1096 | .mand_lock = cifs_mand_lock, |
1097 | .mand_unlock_range = cifs_unlock_range, | |
1098 | .push_mand_locks = cifs_push_mandatory_locks, | |
b5be1a1c | 1099 | .query_mf_symlink = cifs_query_mf_symlink, |
cbb0aba6 | 1100 | .create_mf_symlink = cifs_create_mf_symlink, |
53ef1016 | 1101 | .is_read_op = cifs_is_read_op, |
7f6c5008 | 1102 | .wp_retry_size = cifs_wp_retry_size, |
52755808 | 1103 | .dir_needs_close = cifs_dir_needs_close, |
ef65aaed | 1104 | .select_sectype = cifs_select_sectype, |
d979f3b0 SF |
1105 | #ifdef CONFIG_CIFS_XATTR |
1106 | .query_all_EAs = CIFSSMBQAllEAs, | |
1107 | .set_EA = CIFSSMBSetEA, | |
1108 | #endif /* CIFS_XATTR */ | |
83e3bc23 SF |
1109 | #ifdef CONFIG_CIFS_ACL |
1110 | .get_acl = get_cifs_acl, | |
42eacf9e | 1111 | .get_acl_by_fid = get_cifs_acl_by_fid, |
83e3bc23 SF |
1112 | .set_acl = set_cifs_acl, |
1113 | #endif /* CIFS_ACL */ | |
23db65f5 JL |
1114 | }; |
1115 | ||
1116 | struct smb_version_values smb1_values = { | |
1117 | .version_string = SMB1_VERSION_STRING, | |
106dc538 PS |
1118 | .large_lock_type = LOCKING_ANDX_LARGE_FILES, |
1119 | .exclusive_lock_type = 0, | |
1120 | .shared_lock_type = LOCKING_ANDX_SHARED_LOCK, | |
1121 | .unlock_lock_type = 0, | |
93012bf9 | 1122 | .header_preamble_size = 4, |
1887f601 PS |
1123 | .header_size = sizeof(struct smb_hdr), |
1124 | .max_header_size = MAX_CIFS_HDR_SIZE, | |
eb378711 | 1125 | .read_rsp_size = sizeof(READ_RSP), |
2dc7e1c0 | 1126 | .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX), |
29e20f9c PS |
1127 | .cap_unix = CAP_UNIX, |
1128 | .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, | |
1129 | .cap_large_files = CAP_LARGE_FILES, | |
50285882 JL |
1130 | .signing_enabled = SECMODE_SIGN_ENABLED, |
1131 | .signing_required = SECMODE_SIGN_REQUIRED, | |
23db65f5 | 1132 | }; |