Commit | Line | Data |
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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) { | |
110 | spin_unlock(&GlobalMid_Lock); | |
111 | return mid; | |
112 | } | |
113 | } | |
114 | spin_unlock(&GlobalMid_Lock); | |
115 | return NULL; | |
116 | } | |
117 | ||
45275789 | 118 | static void |
a891f0f8 PS |
119 | cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add, |
120 | const int optype) | |
45275789 PS |
121 | { |
122 | spin_lock(&server->req_lock); | |
123 | server->credits += add; | |
124 | server->in_flight--; | |
125 | spin_unlock(&server->req_lock); | |
126 | wake_up(&server->request_q); | |
127 | } | |
128 | ||
129 | static void | |
130 | cifs_set_credits(struct TCP_Server_Info *server, const int val) | |
131 | { | |
132 | spin_lock(&server->req_lock); | |
133 | server->credits = val; | |
134 | server->oplocks = val > 1 ? enable_oplocks : false; | |
135 | spin_unlock(&server->req_lock); | |
136 | } | |
137 | ||
138 | static int * | |
a891f0f8 | 139 | cifs_get_credits_field(struct TCP_Server_Info *server, const int optype) |
45275789 PS |
140 | { |
141 | return &server->credits; | |
142 | } | |
143 | ||
a891f0f8 PS |
144 | static unsigned int |
145 | cifs_get_credits(struct mid_q_entry *mid) | |
146 | { | |
147 | return 1; | |
148 | } | |
149 | ||
88257360 PS |
150 | /* |
151 | * Find a free multiplex id (SMB mid). Otherwise there could be | |
152 | * mid collisions which might cause problems, demultiplexing the | |
153 | * wrong response to this request. Multiplex ids could collide if | |
154 | * one of a series requests takes much longer than the others, or | |
155 | * if a very large number of long lived requests (byte range | |
156 | * locks or FindNotify requests) are pending. No more than | |
157 | * 64K-1 requests can be outstanding at one time. If no | |
158 | * mids are available, return zero. A future optimization | |
159 | * could make the combination of mids and uid the key we use | |
160 | * to demultiplex on (rather than mid alone). | |
161 | * In addition to the above check, the cifs demultiplex | |
162 | * code already used the command code as a secondary | |
163 | * check of the frame and if signing is negotiated the | |
164 | * response would be discarded if the mid were the same | |
165 | * but the signature was wrong. Since the mid is not put in the | |
166 | * pending queue until later (when it is about to be dispatched) | |
167 | * we do have to limit the number of outstanding requests | |
168 | * to somewhat less than 64K-1 although it is hard to imagine | |
169 | * so many threads being in the vfs at one time. | |
170 | */ | |
171 | static __u64 | |
172 | cifs_get_next_mid(struct TCP_Server_Info *server) | |
173 | { | |
174 | __u64 mid = 0; | |
175 | __u16 last_mid, cur_mid; | |
176 | bool collision; | |
177 | ||
178 | spin_lock(&GlobalMid_Lock); | |
179 | ||
180 | /* mid is 16 bit only for CIFS/SMB */ | |
181 | cur_mid = (__u16)((server->CurrentMid) & 0xffff); | |
182 | /* we do not want to loop forever */ | |
183 | last_mid = cur_mid; | |
184 | cur_mid++; | |
185 | ||
186 | /* | |
187 | * This nested loop looks more expensive than it is. | |
188 | * In practice the list of pending requests is short, | |
189 | * fewer than 50, and the mids are likely to be unique | |
190 | * on the first pass through the loop unless some request | |
191 | * takes longer than the 64 thousand requests before it | |
192 | * (and it would also have to have been a request that | |
193 | * did not time out). | |
194 | */ | |
195 | while (cur_mid != last_mid) { | |
196 | struct mid_q_entry *mid_entry; | |
197 | unsigned int num_mids; | |
198 | ||
199 | collision = false; | |
200 | if (cur_mid == 0) | |
201 | cur_mid++; | |
202 | ||
203 | num_mids = 0; | |
204 | list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { | |
205 | ++num_mids; | |
206 | if (mid_entry->mid == cur_mid && | |
207 | mid_entry->mid_state == MID_REQUEST_SUBMITTED) { | |
208 | /* This mid is in use, try a different one */ | |
209 | collision = true; | |
210 | break; | |
211 | } | |
212 | } | |
213 | ||
214 | /* | |
215 | * if we have more than 32k mids in the list, then something | |
216 | * is very wrong. Possibly a local user is trying to DoS the | |
217 | * box by issuing long-running calls and SIGKILL'ing them. If | |
218 | * we get to 2^16 mids then we're in big trouble as this | |
219 | * function could loop forever. | |
220 | * | |
221 | * Go ahead and assign out the mid in this situation, but force | |
222 | * an eventual reconnect to clean out the pending_mid_q. | |
223 | */ | |
224 | if (num_mids > 32768) | |
225 | server->tcpStatus = CifsNeedReconnect; | |
226 | ||
227 | if (!collision) { | |
228 | mid = (__u64)cur_mid; | |
229 | server->CurrentMid = mid; | |
230 | break; | |
231 | } | |
232 | cur_mid++; | |
233 | } | |
234 | spin_unlock(&GlobalMid_Lock); | |
235 | return mid; | |
236 | } | |
237 | ||
316cf94a PS |
238 | /* |
239 | return codes: | |
240 | 0 not a transact2, or all data present | |
241 | >0 transact2 with that much data missing | |
242 | -EINVAL invalid transact2 | |
243 | */ | |
244 | static int | |
245 | check2ndT2(char *buf) | |
246 | { | |
247 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; | |
248 | struct smb_t2_rsp *pSMBt; | |
249 | int remaining; | |
250 | __u16 total_data_size, data_in_this_rsp; | |
251 | ||
252 | if (pSMB->Command != SMB_COM_TRANSACTION2) | |
253 | return 0; | |
254 | ||
255 | /* check for plausible wct, bcc and t2 data and parm sizes */ | |
256 | /* check for parm and data offset going beyond end of smb */ | |
257 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
f96637be | 258 | cifs_dbg(FYI, "invalid transact2 word count\n"); |
316cf94a PS |
259 | return -EINVAL; |
260 | } | |
261 | ||
262 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
263 | ||
264 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
265 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
266 | ||
267 | if (total_data_size == data_in_this_rsp) | |
268 | return 0; | |
269 | else if (total_data_size < data_in_this_rsp) { | |
f96637be JP |
270 | cifs_dbg(FYI, "total data %d smaller than data in frame %d\n", |
271 | total_data_size, data_in_this_rsp); | |
316cf94a PS |
272 | return -EINVAL; |
273 | } | |
274 | ||
275 | remaining = total_data_size - data_in_this_rsp; | |
276 | ||
f96637be JP |
277 | cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n", |
278 | remaining); | |
316cf94a | 279 | if (total_data_size > CIFSMaxBufSize) { |
f96637be JP |
280 | cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n", |
281 | total_data_size, CIFSMaxBufSize); | |
316cf94a PS |
282 | return -EINVAL; |
283 | } | |
284 | return remaining; | |
285 | } | |
286 | ||
287 | static int | |
288 | coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) | |
289 | { | |
290 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; | |
291 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
292 | char *data_area_of_tgt; | |
293 | char *data_area_of_src; | |
294 | int remaining; | |
295 | unsigned int byte_count, total_in_tgt; | |
296 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
297 | ||
298 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); | |
299 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
300 | ||
301 | if (tgt_total_cnt != src_total_cnt) | |
f96637be JP |
302 | cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n", |
303 | src_total_cnt, tgt_total_cnt); | |
316cf94a PS |
304 | |
305 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
306 | ||
307 | remaining = tgt_total_cnt - total_in_tgt; | |
308 | ||
309 | if (remaining < 0) { | |
f96637be JP |
310 | cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n", |
311 | tgt_total_cnt, total_in_tgt); | |
316cf94a PS |
312 | return -EPROTO; |
313 | } | |
314 | ||
315 | if (remaining == 0) { | |
316 | /* nothing to do, ignore */ | |
f96637be | 317 | cifs_dbg(FYI, "no more data remains\n"); |
316cf94a PS |
318 | return 0; |
319 | } | |
320 | ||
321 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); | |
322 | if (remaining < total_in_src) | |
f96637be | 323 | cifs_dbg(FYI, "transact2 2nd response contains too much data\n"); |
316cf94a PS |
324 | |
325 | /* find end of first SMB data area */ | |
326 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + | |
327 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); | |
328 | ||
329 | /* validate target area */ | |
330 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
331 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
332 | ||
333 | data_area_of_tgt += total_in_tgt; | |
334 | ||
335 | total_in_tgt += total_in_src; | |
336 | /* is the result too big for the field? */ | |
337 | if (total_in_tgt > USHRT_MAX) { | |
f96637be JP |
338 | cifs_dbg(FYI, "coalesced DataCount too large (%u)\n", |
339 | total_in_tgt); | |
316cf94a PS |
340 | return -EPROTO; |
341 | } | |
342 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
343 | ||
344 | /* fix up the BCC */ | |
345 | byte_count = get_bcc(target_hdr); | |
346 | byte_count += total_in_src; | |
347 | /* is the result too big for the field? */ | |
348 | if (byte_count > USHRT_MAX) { | |
f96637be | 349 | cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count); |
316cf94a PS |
350 | return -EPROTO; |
351 | } | |
352 | put_bcc(byte_count, target_hdr); | |
353 | ||
354 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); | |
355 | byte_count += total_in_src; | |
356 | /* don't allow buffer to overflow */ | |
357 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
f96637be JP |
358 | cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n", |
359 | byte_count); | |
316cf94a PS |
360 | return -ENOBUFS; |
361 | } | |
362 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); | |
363 | ||
364 | /* copy second buffer into end of first buffer */ | |
365 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
366 | ||
367 | if (remaining != total_in_src) { | |
368 | /* more responses to go */ | |
f96637be | 369 | cifs_dbg(FYI, "waiting for more secondary responses\n"); |
316cf94a PS |
370 | return 1; |
371 | } | |
372 | ||
373 | /* we are done */ | |
f96637be | 374 | cifs_dbg(FYI, "found the last secondary response\n"); |
316cf94a PS |
375 | return 0; |
376 | } | |
377 | ||
c11f1df5 SP |
378 | static void |
379 | cifs_downgrade_oplock(struct TCP_Server_Info *server, | |
380 | struct cifsInodeInfo *cinode, bool set_level2) | |
381 | { | |
382 | if (set_level2) | |
383 | cifs_set_oplock_level(cinode, OPLOCK_READ); | |
384 | else | |
385 | cifs_set_oplock_level(cinode, 0); | |
386 | } | |
387 | ||
316cf94a PS |
388 | static bool |
389 | cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
390 | char *buf, int malformed) | |
391 | { | |
392 | if (malformed) | |
393 | return false; | |
394 | if (check2ndT2(buf) <= 0) | |
395 | return false; | |
396 | mid->multiRsp = true; | |
397 | if (mid->resp_buf) { | |
398 | /* merge response - fix up 1st*/ | |
399 | malformed = coalesce_t2(buf, mid->resp_buf); | |
400 | if (malformed > 0) | |
401 | return true; | |
402 | /* All parts received or packet is malformed. */ | |
403 | mid->multiEnd = true; | |
404 | dequeue_mid(mid, malformed); | |
405 | return true; | |
406 | } | |
407 | if (!server->large_buf) { | |
408 | /*FIXME: switch to already allocated largebuf?*/ | |
f96637be | 409 | cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n"); |
316cf94a PS |
410 | } else { |
411 | /* Have first buffer */ | |
412 | mid->resp_buf = buf; | |
413 | mid->large_buf = true; | |
414 | server->bigbuf = NULL; | |
415 | } | |
416 | return true; | |
417 | } | |
418 | ||
286170aa PS |
419 | static bool |
420 | cifs_need_neg(struct TCP_Server_Info *server) | |
421 | { | |
422 | return server->maxBuf == 0; | |
423 | } | |
424 | ||
425 | static int | |
426 | cifs_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
427 | { | |
428 | int rc; | |
429 | rc = CIFSSMBNegotiate(xid, ses); | |
430 | if (rc == -EAGAIN) { | |
431 | /* retry only once on 1st time connection */ | |
432 | set_credits(ses->server, 1); | |
433 | rc = CIFSSMBNegotiate(xid, ses); | |
434 | if (rc == -EAGAIN) | |
435 | rc = -EHOSTDOWN; | |
436 | } | |
437 | return rc; | |
438 | } | |
439 | ||
24985c53 PS |
440 | static unsigned int |
441 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
442 | { | |
443 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
444 | struct TCP_Server_Info *server = tcon->ses->server; | |
445 | unsigned int wsize; | |
446 | ||
447 | /* start with specified wsize, or default */ | |
448 | if (volume_info->wsize) | |
449 | wsize = volume_info->wsize; | |
450 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
451 | wsize = CIFS_DEFAULT_IOSIZE; | |
452 | else | |
453 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
454 | ||
455 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
456 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
457 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); | |
458 | ||
459 | /* | |
460 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
461 | * Limit it to max buffer offered by the server, minus the size of the | |
462 | * WRITEX header, not including the 4 byte RFC1001 length. | |
463 | */ | |
464 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
38d77c50 | 465 | (!(server->capabilities & CAP_UNIX) && server->sign)) |
24985c53 PS |
466 | wsize = min_t(unsigned int, wsize, |
467 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
468 | ||
24985c53 PS |
469 | /* hard limit of CIFS_MAX_WSIZE */ |
470 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
471 | ||
472 | return wsize; | |
473 | } | |
474 | ||
475 | static unsigned int | |
476 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
477 | { | |
478 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
479 | struct TCP_Server_Info *server = tcon->ses->server; | |
480 | unsigned int rsize, defsize; | |
481 | ||
482 | /* | |
483 | * Set default value... | |
484 | * | |
485 | * HACK alert! Ancient servers have very small buffers. Even though | |
486 | * MS-CIFS indicates that servers are only limited by the client's | |
487 | * bufsize for reads, testing against win98se shows that it throws | |
488 | * INVALID_PARAMETER errors if you try to request too large a read. | |
489 | * OS/2 just sends back short reads. | |
490 | * | |
491 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that | |
492 | * it can't handle a read request larger than its MaxBufferSize either. | |
493 | */ | |
494 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
495 | defsize = CIFS_DEFAULT_IOSIZE; | |
496 | else if (server->capabilities & CAP_LARGE_READ_X) | |
497 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
498 | else | |
499 | defsize = server->maxBuf - sizeof(READ_RSP); | |
500 | ||
501 | rsize = volume_info->rsize ? volume_info->rsize : defsize; | |
502 | ||
503 | /* | |
504 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
505 | * the client's MaxBufferSize. | |
506 | */ | |
507 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
508 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
509 | ||
24985c53 PS |
510 | /* hard limit of CIFS_MAX_RSIZE */ |
511 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
512 | ||
513 | return rsize; | |
514 | } | |
515 | ||
af4281dc PS |
516 | static void |
517 | cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) | |
518 | { | |
519 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
520 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
521 | } | |
522 | ||
68889f26 PS |
523 | static int |
524 | cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, | |
525 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
526 | { | |
527 | int rc; | |
528 | FILE_ALL_INFO *file_info; | |
529 | ||
530 | file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
531 | if (file_info == NULL) | |
532 | return -ENOMEM; | |
533 | ||
534 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info, | |
535 | 0 /* not legacy */, cifs_sb->local_nls, | |
2baa2682 | 536 | cifs_remap(cifs_sb)); |
68889f26 PS |
537 | |
538 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
539 | rc = SMBQueryInformation(xid, tcon, full_path, file_info, | |
2baa2682 | 540 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
68889f26 PS |
541 | kfree(file_info); |
542 | return rc; | |
543 | } | |
544 | ||
1208ef1f PS |
545 | static int |
546 | cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, | |
547 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
eb85d94b | 548 | FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink) |
1208ef1f PS |
549 | { |
550 | int rc; | |
551 | ||
eb85d94b PS |
552 | *symlink = false; |
553 | ||
1208ef1f PS |
554 | /* could do find first instead but this returns more info */ |
555 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, | |
2baa2682 | 556 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
1208ef1f PS |
557 | /* |
558 | * BB optimize code so we do not make the above call when server claims | |
559 | * no NT SMB support and the above call failed at least once - set flag | |
560 | * in tcon or mount. | |
561 | */ | |
562 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { | |
563 | rc = SMBQueryInformation(xid, tcon, full_path, data, | |
564 | cifs_sb->local_nls, | |
2baa2682 | 565 | cifs_remap(cifs_sb)); |
1208ef1f PS |
566 | *adjustTZ = true; |
567 | } | |
eb85d94b PS |
568 | |
569 | if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) { | |
570 | int tmprc; | |
571 | int oplock = 0; | |
d81b8a40 PS |
572 | struct cifs_fid fid; |
573 | struct cifs_open_parms oparms; | |
574 | ||
575 | oparms.tcon = tcon; | |
576 | oparms.cifs_sb = cifs_sb; | |
577 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
578 | oparms.create_options = 0; | |
579 | oparms.disposition = FILE_OPEN; | |
580 | oparms.path = full_path; | |
581 | oparms.fid = &fid; | |
582 | oparms.reconnect = false; | |
eb85d94b PS |
583 | |
584 | /* Need to check if this is a symbolic link or not */ | |
d81b8a40 | 585 | tmprc = CIFS_open(xid, &oparms, &oplock, NULL); |
eb85d94b PS |
586 | if (tmprc == -EOPNOTSUPP) |
587 | *symlink = true; | |
19e81573 | 588 | else if (tmprc == 0) |
d81b8a40 | 589 | CIFSSMBClose(xid, tcon, fid.netfid); |
eb85d94b PS |
590 | } |
591 | ||
1208ef1f PS |
592 | return rc; |
593 | } | |
594 | ||
595 | static int | |
596 | cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, | |
597 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
598 | u64 *uniqueid, FILE_ALL_INFO *data) | |
599 | { | |
600 | /* | |
601 | * We can not use the IndexNumber field by default from Windows or | |
602 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
603 | * CIFS spec claims that this value is unique within the scope of a | |
604 | * share, and the windows docs hint that it's actually unique | |
605 | * per-machine. | |
606 | * | |
607 | * There may be higher info levels that work but are there Windows | |
608 | * server or network appliances for which IndexNumber field is not | |
609 | * guaranteed unique? | |
610 | */ | |
611 | return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid, | |
612 | cifs_sb->local_nls, | |
2baa2682 | 613 | cifs_remap(cifs_sb)); |
1208ef1f PS |
614 | } |
615 | ||
4ad65044 PS |
616 | static int |
617 | cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, | |
618 | struct cifs_fid *fid, FILE_ALL_INFO *data) | |
619 | { | |
620 | return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); | |
621 | } | |
622 | ||
44c58186 PS |
623 | static void |
624 | cifs_clear_stats(struct cifs_tcon *tcon) | |
625 | { | |
626 | #ifdef CONFIG_CIFS_STATS | |
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); | |
648 | #endif | |
649 | } | |
650 | ||
651 | static void | |
652 | cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon) | |
653 | { | |
654 | #ifdef CONFIG_CIFS_STATS | |
655 | seq_printf(m, " Oplocks breaks: %d", | |
656 | atomic_read(&tcon->stats.cifs_stats.num_oplock_brks)); | |
657 | seq_printf(m, "\nReads: %d Bytes: %llu", | |
658 | atomic_read(&tcon->stats.cifs_stats.num_reads), | |
659 | (long long)(tcon->bytes_read)); | |
660 | seq_printf(m, "\nWrites: %d Bytes: %llu", | |
661 | atomic_read(&tcon->stats.cifs_stats.num_writes), | |
662 | (long long)(tcon->bytes_written)); | |
663 | seq_printf(m, "\nFlushes: %d", | |
664 | atomic_read(&tcon->stats.cifs_stats.num_flushes)); | |
665 | seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d", | |
666 | atomic_read(&tcon->stats.cifs_stats.num_locks), | |
667 | atomic_read(&tcon->stats.cifs_stats.num_hardlinks), | |
668 | atomic_read(&tcon->stats.cifs_stats.num_symlinks)); | |
669 | seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d", | |
670 | atomic_read(&tcon->stats.cifs_stats.num_opens), | |
671 | atomic_read(&tcon->stats.cifs_stats.num_closes), | |
672 | atomic_read(&tcon->stats.cifs_stats.num_deletes)); | |
673 | seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d", | |
674 | atomic_read(&tcon->stats.cifs_stats.num_posixopens), | |
675 | atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs)); | |
676 | seq_printf(m, "\nMkdirs: %d Rmdirs: %d", | |
677 | atomic_read(&tcon->stats.cifs_stats.num_mkdirs), | |
678 | atomic_read(&tcon->stats.cifs_stats.num_rmdirs)); | |
679 | seq_printf(m, "\nRenames: %d T2 Renames %d", | |
680 | atomic_read(&tcon->stats.cifs_stats.num_renames), | |
681 | atomic_read(&tcon->stats.cifs_stats.num_t2renames)); | |
682 | seq_printf(m, "\nFindFirst: %d FNext %d FClose %d", | |
683 | atomic_read(&tcon->stats.cifs_stats.num_ffirst), | |
684 | atomic_read(&tcon->stats.cifs_stats.num_fnext), | |
685 | atomic_read(&tcon->stats.cifs_stats.num_fclose)); | |
686 | #endif | |
687 | } | |
688 | ||
f436720e PS |
689 | static void |
690 | cifs_mkdir_setinfo(struct inode *inode, const char *full_path, | |
691 | struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, | |
692 | const unsigned int xid) | |
693 | { | |
694 | FILE_BASIC_INFO info; | |
695 | struct cifsInodeInfo *cifsInode; | |
696 | u32 dosattrs; | |
697 | int rc; | |
698 | ||
699 | memset(&info, 0, sizeof(info)); | |
700 | cifsInode = CIFS_I(inode); | |
701 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
702 | info.Attributes = cpu_to_le32(dosattrs); | |
703 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls, | |
2baa2682 | 704 | cifs_remap(cifs_sb)); |
f436720e PS |
705 | if (rc == 0) |
706 | cifsInode->cifsAttrs = dosattrs; | |
707 | } | |
708 | ||
fb1214e4 | 709 | static int |
226730b4 PS |
710 | cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms, |
711 | __u32 *oplock, FILE_ALL_INFO *buf) | |
fb1214e4 | 712 | { |
226730b4 PS |
713 | if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS)) |
714 | return SMBLegacyOpen(xid, oparms->tcon, oparms->path, | |
715 | oparms->disposition, | |
716 | oparms->desired_access, | |
717 | oparms->create_options, | |
718 | &oparms->fid->netfid, oplock, buf, | |
719 | oparms->cifs_sb->local_nls, | |
2baa2682 | 720 | cifs_remap(oparms->cifs_sb)); |
d81b8a40 | 721 | return CIFS_open(xid, oparms, oplock, buf); |
fb1214e4 PS |
722 | } |
723 | ||
724 | static void | |
725 | cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) | |
726 | { | |
2b0143b5 | 727 | struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); |
fb1214e4 PS |
728 | cfile->fid.netfid = fid->netfid; |
729 | cifs_set_oplock_level(cinode, oplock); | |
18cceb6a | 730 | cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); |
fb1214e4 PS |
731 | } |
732 | ||
760ad0ca | 733 | static void |
0ff78a22 PS |
734 | cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon, |
735 | struct cifs_fid *fid) | |
736 | { | |
760ad0ca | 737 | CIFSSMBClose(xid, tcon, fid->netfid); |
0ff78a22 PS |
738 | } |
739 | ||
1d8c4c00 PS |
740 | static int |
741 | cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon, | |
742 | struct cifs_fid *fid) | |
743 | { | |
744 | return CIFSSMBFlush(xid, tcon, fid->netfid); | |
745 | } | |
746 | ||
f9c6e234 | 747 | static int |
db8b631d | 748 | cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid, |
f9c6e234 PS |
749 | struct cifs_io_parms *parms, unsigned int *bytes_read, |
750 | char **buf, int *buf_type) | |
751 | { | |
db8b631d | 752 | parms->netfid = pfid->netfid; |
f9c6e234 PS |
753 | return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type); |
754 | } | |
755 | ||
ba9ad725 | 756 | static int |
db8b631d | 757 | cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid, |
ba9ad725 PS |
758 | struct cifs_io_parms *parms, unsigned int *written, |
759 | struct kvec *iov, unsigned long nr_segs) | |
760 | { | |
761 | ||
db8b631d | 762 | parms->netfid = pfid->netfid; |
ba9ad725 PS |
763 | return CIFSSMBWrite2(xid, parms, written, iov, nr_segs); |
764 | } | |
765 | ||
6bdf6dbd PS |
766 | static int |
767 | smb_set_file_info(struct inode *inode, const char *full_path, | |
768 | FILE_BASIC_INFO *buf, const unsigned int xid) | |
769 | { | |
770 | int oplock = 0; | |
771 | int rc; | |
6bdf6dbd | 772 | __u32 netpid; |
d81b8a40 PS |
773 | struct cifs_fid fid; |
774 | struct cifs_open_parms oparms; | |
6bdf6dbd PS |
775 | struct cifsFileInfo *open_file; |
776 | struct cifsInodeInfo *cinode = CIFS_I(inode); | |
777 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
778 | struct tcon_link *tlink = NULL; | |
779 | struct cifs_tcon *tcon; | |
6bdf6dbd PS |
780 | |
781 | /* if the file is already open for write, just use that fileid */ | |
782 | open_file = find_writable_file(cinode, true); | |
783 | if (open_file) { | |
d81b8a40 | 784 | fid.netfid = open_file->fid.netfid; |
6bdf6dbd PS |
785 | netpid = open_file->pid; |
786 | tcon = tlink_tcon(open_file->tlink); | |
787 | goto set_via_filehandle; | |
788 | } | |
789 | ||
790 | tlink = cifs_sb_tlink(cifs_sb); | |
791 | if (IS_ERR(tlink)) { | |
792 | rc = PTR_ERR(tlink); | |
793 | tlink = NULL; | |
794 | goto out; | |
795 | } | |
796 | tcon = tlink_tcon(tlink); | |
797 | ||
281e2e7d | 798 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls, |
2baa2682 | 799 | cifs_remap(cifs_sb)); |
281e2e7d JL |
800 | if (rc == 0) { |
801 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
802 | goto out; | |
803 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) { | |
804 | goto out; | |
6bdf6dbd PS |
805 | } |
806 | ||
d81b8a40 PS |
807 | oparms.tcon = tcon; |
808 | oparms.cifs_sb = cifs_sb; | |
809 | oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES; | |
810 | oparms.create_options = CREATE_NOT_DIR; | |
811 | oparms.disposition = FILE_OPEN; | |
812 | oparms.path = full_path; | |
813 | oparms.fid = &fid; | |
814 | oparms.reconnect = false; | |
6bdf6dbd | 815 | |
d81b8a40 PS |
816 | cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n"); |
817 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
6bdf6dbd PS |
818 | if (rc != 0) { |
819 | if (rc == -EIO) | |
820 | rc = -EINVAL; | |
821 | goto out; | |
822 | } | |
823 | ||
824 | netpid = current->tgid; | |
825 | ||
826 | set_via_filehandle: | |
d81b8a40 | 827 | rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid); |
6bdf6dbd PS |
828 | if (!rc) |
829 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
830 | ||
831 | if (open_file == NULL) | |
d81b8a40 | 832 | CIFSSMBClose(xid, tcon, fid.netfid); |
6bdf6dbd PS |
833 | else |
834 | cifsFileInfo_put(open_file); | |
835 | out: | |
836 | if (tlink != NULL) | |
837 | cifs_put_tlink(tlink); | |
838 | return rc; | |
839 | } | |
840 | ||
c7f508a9 SF |
841 | static int |
842 | cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
843 | struct cifsFileInfo *cfile) | |
844 | { | |
845 | return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid); | |
846 | } | |
847 | ||
92fc65a7 PS |
848 | static int |
849 | cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, | |
850 | const char *path, struct cifs_sb_info *cifs_sb, | |
851 | struct cifs_fid *fid, __u16 search_flags, | |
852 | struct cifs_search_info *srch_inf) | |
853 | { | |
dcd87838 PS |
854 | int rc; |
855 | ||
856 | rc = CIFSFindFirst(xid, tcon, path, cifs_sb, | |
857 | &fid->netfid, search_flags, srch_inf, true); | |
858 | if (rc) | |
859 | cifs_dbg(FYI, "find first failed=%d\n", rc); | |
860 | return rc; | |
92fc65a7 PS |
861 | } |
862 | ||
863 | static int | |
864 | cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, | |
865 | struct cifs_fid *fid, __u16 search_flags, | |
866 | struct cifs_search_info *srch_inf) | |
867 | { | |
868 | return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf); | |
869 | } | |
870 | ||
871 | static int | |
872 | cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon, | |
873 | struct cifs_fid *fid) | |
874 | { | |
875 | return CIFSFindClose(xid, tcon, fid->netfid); | |
876 | } | |
877 | ||
95a3f2f3 PS |
878 | static int |
879 | cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, | |
880 | struct cifsInodeInfo *cinode) | |
881 | { | |
882 | return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0, | |
883 | LOCKING_ANDX_OPLOCK_RELEASE, false, | |
18cceb6a | 884 | CIFS_CACHE_READ(cinode) ? 1 : 0); |
95a3f2f3 PS |
885 | } |
886 | ||
76ec5e33 PS |
887 | static int |
888 | cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon, | |
889 | struct kstatfs *buf) | |
890 | { | |
891 | int rc = -EOPNOTSUPP; | |
892 | ||
893 | buf->f_type = CIFS_MAGIC_NUMBER; | |
894 | ||
895 | /* | |
896 | * We could add a second check for a QFS Unix capability bit | |
897 | */ | |
898 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
899 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
900 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
901 | ||
902 | /* | |
903 | * Only need to call the old QFSInfo if failed on newer one, | |
904 | * e.g. by OS/2. | |
905 | **/ | |
906 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
907 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
908 | ||
909 | /* | |
910 | * Some old Windows servers also do not support level 103, retry with | |
911 | * older level one if old server failed the previous call or we | |
912 | * bypassed it because we detected that this was an older LANMAN sess | |
913 | */ | |
914 | if (rc) | |
915 | rc = SMBOldQFSInfo(xid, tcon, buf); | |
916 | return rc; | |
917 | } | |
918 | ||
d39a4f71 PS |
919 | static int |
920 | cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, | |
921 | __u64 length, __u32 type, int lock, int unlock, bool wait) | |
922 | { | |
923 | return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid, | |
924 | current->tgid, length, offset, unlock, lock, | |
925 | (__u8)type, wait, 0); | |
926 | } | |
927 | ||
924e3fa4 SP |
928 | static int |
929 | cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon, | |
930 | const unsigned char *searchName, char **symlinkinfo, | |
931 | const struct nls_table *nls_codepage) | |
932 | { | |
933 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
934 | int rc; | |
935 | unsigned int num_referrals = 0; | |
936 | struct dfs_info3_param *referrals = NULL; | |
937 | ||
938 | rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, | |
939 | &num_referrals, &referrals, 0); | |
940 | ||
941 | if (!rc && num_referrals > 0) { | |
942 | *symlinkinfo = kstrndup(referrals->node_name, | |
943 | strlen(referrals->node_name), | |
944 | GFP_KERNEL); | |
945 | if (!*symlinkinfo) | |
946 | rc = -ENOMEM; | |
947 | free_dfs_info_array(referrals, num_referrals); | |
948 | } | |
949 | return rc; | |
950 | #else /* No DFS support */ | |
951 | return -EREMOTE; | |
952 | #endif | |
953 | } | |
954 | ||
d244bf2d PS |
955 | static int |
956 | cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, | |
957 | const char *full_path, char **target_path, | |
958 | struct cifs_sb_info *cifs_sb) | |
959 | { | |
960 | int rc; | |
961 | int oplock = 0; | |
d81b8a40 PS |
962 | struct cifs_fid fid; |
963 | struct cifs_open_parms oparms; | |
d244bf2d PS |
964 | |
965 | cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); | |
966 | ||
0ecdb4f5 SP |
967 | /* Check for unix extensions */ |
968 | if (cap_unix(tcon->ses)) { | |
969 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path, | |
bc8ebdc4 NA |
970 | cifs_sb->local_nls, |
971 | cifs_remap(cifs_sb)); | |
924e3fa4 SP |
972 | if (rc == -EREMOTE) |
973 | rc = cifs_unix_dfs_readlink(xid, tcon, full_path, | |
974 | target_path, | |
975 | cifs_sb->local_nls); | |
976 | ||
0ecdb4f5 SP |
977 | goto out; |
978 | } | |
979 | ||
d81b8a40 PS |
980 | oparms.tcon = tcon; |
981 | oparms.cifs_sb = cifs_sb; | |
982 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
983 | oparms.create_options = OPEN_REPARSE_POINT; | |
984 | oparms.disposition = FILE_OPEN; | |
985 | oparms.path = full_path; | |
986 | oparms.fid = &fid; | |
987 | oparms.reconnect = false; | |
988 | ||
989 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
d244bf2d | 990 | if (rc) |
0ecdb4f5 | 991 | goto out; |
d244bf2d | 992 | |
d81b8a40 | 993 | rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path, |
d244bf2d | 994 | cifs_sb->local_nls); |
0ecdb4f5 SP |
995 | if (rc) |
996 | goto out_close; | |
d244bf2d PS |
997 | |
998 | convert_delimiter(*target_path, '/'); | |
0ecdb4f5 | 999 | out_close: |
d81b8a40 | 1000 | CIFSSMBClose(xid, tcon, fid.netfid); |
0ecdb4f5 SP |
1001 | out: |
1002 | if (!rc) | |
1003 | cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); | |
d244bf2d PS |
1004 | return rc; |
1005 | } | |
1006 | ||
53ef1016 PS |
1007 | static bool |
1008 | cifs_is_read_op(__u32 oplock) | |
1009 | { | |
1010 | return oplock == OPLOCK_READ; | |
1011 | } | |
1012 | ||
7f6c5008 PS |
1013 | static unsigned int |
1014 | cifs_wp_retry_size(struct inode *inode) | |
1015 | { | |
1016 | return CIFS_SB(inode->i_sb)->wsize; | |
1017 | } | |
1018 | ||
52755808 PS |
1019 | static bool |
1020 | cifs_dir_needs_close(struct cifsFileInfo *cfile) | |
1021 | { | |
1022 | return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle; | |
1023 | } | |
1024 | ||
62a6cfdd SP |
1025 | static bool |
1026 | cifs_can_echo(struct TCP_Server_Info *server) | |
1027 | { | |
1028 | if (server->tcpStatus == CifsGood) | |
1029 | return true; | |
1030 | ||
1031 | return false; | |
1032 | } | |
1033 | ||
23db65f5 | 1034 | struct smb_version_operations smb1_operations = { |
121b046a | 1035 | .send_cancel = send_nt_cancel, |
55157dfb | 1036 | .compare_fids = cifs_compare_fids, |
082d0642 | 1037 | .setup_request = cifs_setup_request, |
45740847 | 1038 | .setup_async_request = cifs_setup_async_request, |
082d0642 | 1039 | .check_receive = cifs_check_receive, |
45275789 PS |
1040 | .add_credits = cifs_add_credits, |
1041 | .set_credits = cifs_set_credits, | |
1042 | .get_credits_field = cifs_get_credits_field, | |
a891f0f8 | 1043 | .get_credits = cifs_get_credits, |
cb7e9eab | 1044 | .wait_mtu_credits = cifs_wait_mtu_credits, |
88257360 | 1045 | .get_next_mid = cifs_get_next_mid, |
eb378711 PS |
1046 | .read_data_offset = cifs_read_data_offset, |
1047 | .read_data_length = cifs_read_data_length, | |
1048 | .map_error = map_smb_to_linux_error, | |
8aa26f3e PS |
1049 | .find_mid = cifs_find_mid, |
1050 | .check_message = checkSMB, | |
1051 | .dump_detail = cifs_dump_detail, | |
44c58186 PS |
1052 | .clear_stats = cifs_clear_stats, |
1053 | .print_stats = cifs_print_stats, | |
8aa26f3e | 1054 | .is_oplock_break = is_valid_oplock_break, |
c11f1df5 | 1055 | .downgrade_oplock = cifs_downgrade_oplock, |
316cf94a | 1056 | .check_trans2 = cifs_check_trans2, |
286170aa PS |
1057 | .need_neg = cifs_need_neg, |
1058 | .negotiate = cifs_negotiate, | |
24985c53 PS |
1059 | .negotiate_wsize = cifs_negotiate_wsize, |
1060 | .negotiate_rsize = cifs_negotiate_rsize, | |
58c45c58 PS |
1061 | .sess_setup = CIFS_SessSetup, |
1062 | .logoff = CIFSSMBLogoff, | |
2e6e02ab PS |
1063 | .tree_connect = CIFSTCon, |
1064 | .tree_disconnect = CIFSSMBTDis, | |
b669f33c | 1065 | .get_dfs_refer = CIFSGetDFSRefer, |
af4281dc | 1066 | .qfs_tcon = cifs_qfs_tcon, |
68889f26 | 1067 | .is_path_accessible = cifs_is_path_accessible, |
62a6cfdd | 1068 | .can_echo = cifs_can_echo, |
1208ef1f | 1069 | .query_path_info = cifs_query_path_info, |
4ad65044 | 1070 | .query_file_info = cifs_query_file_info, |
1208ef1f | 1071 | .get_srv_inum = cifs_get_srv_inum, |
d1433418 PS |
1072 | .set_path_size = CIFSSMBSetEOF, |
1073 | .set_file_size = CIFSSMBSetFileSize, | |
6bdf6dbd | 1074 | .set_file_info = smb_set_file_info, |
c7f508a9 | 1075 | .set_compression = cifs_set_compression, |
f6d76178 | 1076 | .echo = CIFSSMBEcho, |
f436720e PS |
1077 | .mkdir = CIFSSMBMkDir, |
1078 | .mkdir_setinfo = cifs_mkdir_setinfo, | |
f958ca5d | 1079 | .rmdir = CIFSSMBRmDir, |
ed6875e0 PS |
1080 | .unlink = CIFSSMBDelFile, |
1081 | .rename_pending_delete = cifs_rename_pending_delete, | |
8ceb9843 | 1082 | .rename = CIFSSMBRename, |
d6e906f1 | 1083 | .create_hardlink = CIFSCreateHardLink, |
d244bf2d | 1084 | .query_symlink = cifs_query_symlink, |
fb1214e4 PS |
1085 | .open = cifs_open_file, |
1086 | .set_fid = cifs_set_fid, | |
0ff78a22 | 1087 | .close = cifs_close_file, |
1d8c4c00 | 1088 | .flush = cifs_flush_file, |
fc9c5966 | 1089 | .async_readv = cifs_async_readv, |
c9de5c80 | 1090 | .async_writev = cifs_async_writev, |
f9c6e234 | 1091 | .sync_read = cifs_sync_read, |
ba9ad725 | 1092 | .sync_write = cifs_sync_write, |
92fc65a7 PS |
1093 | .query_dir_first = cifs_query_dir_first, |
1094 | .query_dir_next = cifs_query_dir_next, | |
1095 | .close_dir = cifs_close_dir, | |
1096 | .calc_smb_size = smbCalcSize, | |
95a3f2f3 | 1097 | .oplock_response = cifs_oplock_response, |
76ec5e33 | 1098 | .queryfs = cifs_queryfs, |
d39a4f71 PS |
1099 | .mand_lock = cifs_mand_lock, |
1100 | .mand_unlock_range = cifs_unlock_range, | |
1101 | .push_mand_locks = cifs_push_mandatory_locks, | |
b5be1a1c | 1102 | .query_mf_symlink = cifs_query_mf_symlink, |
cbb0aba6 | 1103 | .create_mf_symlink = cifs_create_mf_symlink, |
53ef1016 | 1104 | .is_read_op = cifs_is_read_op, |
7f6c5008 | 1105 | .wp_retry_size = cifs_wp_retry_size, |
52755808 | 1106 | .dir_needs_close = cifs_dir_needs_close, |
ef65aaed | 1107 | .select_sectype = cifs_select_sectype, |
d979f3b0 SF |
1108 | #ifdef CONFIG_CIFS_XATTR |
1109 | .query_all_EAs = CIFSSMBQAllEAs, | |
1110 | .set_EA = CIFSSMBSetEA, | |
1111 | #endif /* CIFS_XATTR */ | |
83e3bc23 SF |
1112 | #ifdef CONFIG_CIFS_ACL |
1113 | .get_acl = get_cifs_acl, | |
42eacf9e | 1114 | .get_acl_by_fid = get_cifs_acl_by_fid, |
83e3bc23 SF |
1115 | .set_acl = set_cifs_acl, |
1116 | #endif /* CIFS_ACL */ | |
23db65f5 JL |
1117 | }; |
1118 | ||
1119 | struct smb_version_values smb1_values = { | |
1120 | .version_string = SMB1_VERSION_STRING, | |
106dc538 PS |
1121 | .large_lock_type = LOCKING_ANDX_LARGE_FILES, |
1122 | .exclusive_lock_type = 0, | |
1123 | .shared_lock_type = LOCKING_ANDX_SHARED_LOCK, | |
1124 | .unlock_lock_type = 0, | |
93012bf9 | 1125 | .header_preamble_size = 4, |
1887f601 PS |
1126 | .header_size = sizeof(struct smb_hdr), |
1127 | .max_header_size = MAX_CIFS_HDR_SIZE, | |
eb378711 | 1128 | .read_rsp_size = sizeof(READ_RSP), |
2dc7e1c0 | 1129 | .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX), |
29e20f9c PS |
1130 | .cap_unix = CAP_UNIX, |
1131 | .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, | |
1132 | .cap_large_files = CAP_LARGE_FILES, | |
50285882 JL |
1133 | .signing_enabled = SECMODE_SIGN_ENABLED, |
1134 | .signing_required = SECMODE_SIGN_REQUIRED, | |
23db65f5 | 1135 | }; |