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> |
23db65f5 | 21 | #include "cifsglob.h" |
121b046a JL |
22 | #include "cifsproto.h" |
23 | #include "cifs_debug.h" | |
106dc538 | 24 | #include "cifspdu.h" |
121b046a JL |
25 | |
26 | /* | |
27 | * An NT cancel request header looks just like the original request except: | |
28 | * | |
29 | * The Command is SMB_COM_NT_CANCEL | |
30 | * The WordCount is zeroed out | |
31 | * The ByteCount is zeroed out | |
32 | * | |
33 | * This function mangles an existing request buffer into a | |
34 | * SMB_COM_NT_CANCEL request and then sends it. | |
35 | */ | |
36 | static int | |
37 | send_nt_cancel(struct TCP_Server_Info *server, void *buf, | |
38 | struct mid_q_entry *mid) | |
39 | { | |
40 | int rc = 0; | |
41 | struct smb_hdr *in_buf = (struct smb_hdr *)buf; | |
42 | ||
43 | /* -4 for RFC1001 length and +2 for BCC field */ | |
44 | in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2); | |
45 | in_buf->Command = SMB_COM_NT_CANCEL; | |
46 | in_buf->WordCount = 0; | |
47 | put_bcc(0, in_buf); | |
48 | ||
49 | mutex_lock(&server->srv_mutex); | |
50 | rc = cifs_sign_smb(in_buf, server, &mid->sequence_number); | |
51 | if (rc) { | |
52 | mutex_unlock(&server->srv_mutex); | |
53 | return rc; | |
54 | } | |
55 | rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); | |
56 | mutex_unlock(&server->srv_mutex); | |
57 | ||
58 | cFYI(1, "issued NT_CANCEL for mid %u, rc = %d", | |
59 | in_buf->Mid, rc); | |
60 | ||
61 | return rc; | |
62 | } | |
23db65f5 | 63 | |
55157dfb PS |
64 | static bool |
65 | cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) | |
66 | { | |
4b4de76e | 67 | return ob1->fid.netfid == ob2->fid.netfid; |
55157dfb PS |
68 | } |
69 | ||
eb378711 PS |
70 | static unsigned int |
71 | cifs_read_data_offset(char *buf) | |
72 | { | |
73 | READ_RSP *rsp = (READ_RSP *)buf; | |
74 | return le16_to_cpu(rsp->DataOffset); | |
75 | } | |
76 | ||
77 | static unsigned int | |
78 | cifs_read_data_length(char *buf) | |
79 | { | |
80 | READ_RSP *rsp = (READ_RSP *)buf; | |
81 | return (le16_to_cpu(rsp->DataLengthHigh) << 16) + | |
82 | le16_to_cpu(rsp->DataLength); | |
83 | } | |
84 | ||
8aa26f3e PS |
85 | static struct mid_q_entry * |
86 | cifs_find_mid(struct TCP_Server_Info *server, char *buffer) | |
87 | { | |
88 | struct smb_hdr *buf = (struct smb_hdr *)buffer; | |
89 | struct mid_q_entry *mid; | |
90 | ||
91 | spin_lock(&GlobalMid_Lock); | |
92 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { | |
93 | if (mid->mid == buf->Mid && | |
94 | mid->mid_state == MID_REQUEST_SUBMITTED && | |
95 | le16_to_cpu(mid->command) == buf->Command) { | |
96 | spin_unlock(&GlobalMid_Lock); | |
97 | return mid; | |
98 | } | |
99 | } | |
100 | spin_unlock(&GlobalMid_Lock); | |
101 | return NULL; | |
102 | } | |
103 | ||
45275789 | 104 | static void |
a891f0f8 PS |
105 | cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add, |
106 | const int optype) | |
45275789 PS |
107 | { |
108 | spin_lock(&server->req_lock); | |
109 | server->credits += add; | |
110 | server->in_flight--; | |
111 | spin_unlock(&server->req_lock); | |
112 | wake_up(&server->request_q); | |
113 | } | |
114 | ||
115 | static void | |
116 | cifs_set_credits(struct TCP_Server_Info *server, const int val) | |
117 | { | |
118 | spin_lock(&server->req_lock); | |
119 | server->credits = val; | |
120 | server->oplocks = val > 1 ? enable_oplocks : false; | |
121 | spin_unlock(&server->req_lock); | |
122 | } | |
123 | ||
124 | static int * | |
a891f0f8 | 125 | cifs_get_credits_field(struct TCP_Server_Info *server, const int optype) |
45275789 PS |
126 | { |
127 | return &server->credits; | |
128 | } | |
129 | ||
a891f0f8 PS |
130 | static unsigned int |
131 | cifs_get_credits(struct mid_q_entry *mid) | |
132 | { | |
133 | return 1; | |
134 | } | |
135 | ||
88257360 PS |
136 | /* |
137 | * Find a free multiplex id (SMB mid). Otherwise there could be | |
138 | * mid collisions which might cause problems, demultiplexing the | |
139 | * wrong response to this request. Multiplex ids could collide if | |
140 | * one of a series requests takes much longer than the others, or | |
141 | * if a very large number of long lived requests (byte range | |
142 | * locks or FindNotify requests) are pending. No more than | |
143 | * 64K-1 requests can be outstanding at one time. If no | |
144 | * mids are available, return zero. A future optimization | |
145 | * could make the combination of mids and uid the key we use | |
146 | * to demultiplex on (rather than mid alone). | |
147 | * In addition to the above check, the cifs demultiplex | |
148 | * code already used the command code as a secondary | |
149 | * check of the frame and if signing is negotiated the | |
150 | * response would be discarded if the mid were the same | |
151 | * but the signature was wrong. Since the mid is not put in the | |
152 | * pending queue until later (when it is about to be dispatched) | |
153 | * we do have to limit the number of outstanding requests | |
154 | * to somewhat less than 64K-1 although it is hard to imagine | |
155 | * so many threads being in the vfs at one time. | |
156 | */ | |
157 | static __u64 | |
158 | cifs_get_next_mid(struct TCP_Server_Info *server) | |
159 | { | |
160 | __u64 mid = 0; | |
161 | __u16 last_mid, cur_mid; | |
162 | bool collision; | |
163 | ||
164 | spin_lock(&GlobalMid_Lock); | |
165 | ||
166 | /* mid is 16 bit only for CIFS/SMB */ | |
167 | cur_mid = (__u16)((server->CurrentMid) & 0xffff); | |
168 | /* we do not want to loop forever */ | |
169 | last_mid = cur_mid; | |
170 | cur_mid++; | |
171 | ||
172 | /* | |
173 | * This nested loop looks more expensive than it is. | |
174 | * In practice the list of pending requests is short, | |
175 | * fewer than 50, and the mids are likely to be unique | |
176 | * on the first pass through the loop unless some request | |
177 | * takes longer than the 64 thousand requests before it | |
178 | * (and it would also have to have been a request that | |
179 | * did not time out). | |
180 | */ | |
181 | while (cur_mid != last_mid) { | |
182 | struct mid_q_entry *mid_entry; | |
183 | unsigned int num_mids; | |
184 | ||
185 | collision = false; | |
186 | if (cur_mid == 0) | |
187 | cur_mid++; | |
188 | ||
189 | num_mids = 0; | |
190 | list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { | |
191 | ++num_mids; | |
192 | if (mid_entry->mid == cur_mid && | |
193 | mid_entry->mid_state == MID_REQUEST_SUBMITTED) { | |
194 | /* This mid is in use, try a different one */ | |
195 | collision = true; | |
196 | break; | |
197 | } | |
198 | } | |
199 | ||
200 | /* | |
201 | * if we have more than 32k mids in the list, then something | |
202 | * is very wrong. Possibly a local user is trying to DoS the | |
203 | * box by issuing long-running calls and SIGKILL'ing them. If | |
204 | * we get to 2^16 mids then we're in big trouble as this | |
205 | * function could loop forever. | |
206 | * | |
207 | * Go ahead and assign out the mid in this situation, but force | |
208 | * an eventual reconnect to clean out the pending_mid_q. | |
209 | */ | |
210 | if (num_mids > 32768) | |
211 | server->tcpStatus = CifsNeedReconnect; | |
212 | ||
213 | if (!collision) { | |
214 | mid = (__u64)cur_mid; | |
215 | server->CurrentMid = mid; | |
216 | break; | |
217 | } | |
218 | cur_mid++; | |
219 | } | |
220 | spin_unlock(&GlobalMid_Lock); | |
221 | return mid; | |
222 | } | |
223 | ||
316cf94a PS |
224 | /* |
225 | return codes: | |
226 | 0 not a transact2, or all data present | |
227 | >0 transact2 with that much data missing | |
228 | -EINVAL invalid transact2 | |
229 | */ | |
230 | static int | |
231 | check2ndT2(char *buf) | |
232 | { | |
233 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; | |
234 | struct smb_t2_rsp *pSMBt; | |
235 | int remaining; | |
236 | __u16 total_data_size, data_in_this_rsp; | |
237 | ||
238 | if (pSMB->Command != SMB_COM_TRANSACTION2) | |
239 | return 0; | |
240 | ||
241 | /* check for plausible wct, bcc and t2 data and parm sizes */ | |
242 | /* check for parm and data offset going beyond end of smb */ | |
243 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
244 | cFYI(1, "invalid transact2 word count"); | |
245 | return -EINVAL; | |
246 | } | |
247 | ||
248 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
249 | ||
250 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
251 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
252 | ||
253 | if (total_data_size == data_in_this_rsp) | |
254 | return 0; | |
255 | else if (total_data_size < data_in_this_rsp) { | |
256 | cFYI(1, "total data %d smaller than data in frame %d", | |
257 | total_data_size, data_in_this_rsp); | |
258 | return -EINVAL; | |
259 | } | |
260 | ||
261 | remaining = total_data_size - data_in_this_rsp; | |
262 | ||
263 | cFYI(1, "missing %d bytes from transact2, check next response", | |
264 | remaining); | |
265 | if (total_data_size > CIFSMaxBufSize) { | |
266 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", | |
267 | total_data_size, CIFSMaxBufSize); | |
268 | return -EINVAL; | |
269 | } | |
270 | return remaining; | |
271 | } | |
272 | ||
273 | static int | |
274 | coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) | |
275 | { | |
276 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; | |
277 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
278 | char *data_area_of_tgt; | |
279 | char *data_area_of_src; | |
280 | int remaining; | |
281 | unsigned int byte_count, total_in_tgt; | |
282 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
283 | ||
284 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); | |
285 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
286 | ||
287 | if (tgt_total_cnt != src_total_cnt) | |
288 | cFYI(1, "total data count of primary and secondary t2 differ " | |
289 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); | |
290 | ||
291 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
292 | ||
293 | remaining = tgt_total_cnt - total_in_tgt; | |
294 | ||
295 | if (remaining < 0) { | |
296 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " | |
297 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); | |
298 | return -EPROTO; | |
299 | } | |
300 | ||
301 | if (remaining == 0) { | |
302 | /* nothing to do, ignore */ | |
303 | cFYI(1, "no more data remains"); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); | |
308 | if (remaining < total_in_src) | |
309 | cFYI(1, "transact2 2nd response contains too much data"); | |
310 | ||
311 | /* find end of first SMB data area */ | |
312 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + | |
313 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); | |
314 | ||
315 | /* validate target area */ | |
316 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
317 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
318 | ||
319 | data_area_of_tgt += total_in_tgt; | |
320 | ||
321 | total_in_tgt += total_in_src; | |
322 | /* is the result too big for the field? */ | |
323 | if (total_in_tgt > USHRT_MAX) { | |
324 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); | |
325 | return -EPROTO; | |
326 | } | |
327 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
328 | ||
329 | /* fix up the BCC */ | |
330 | byte_count = get_bcc(target_hdr); | |
331 | byte_count += total_in_src; | |
332 | /* is the result too big for the field? */ | |
333 | if (byte_count > USHRT_MAX) { | |
334 | cFYI(1, "coalesced BCC too large (%u)", byte_count); | |
335 | return -EPROTO; | |
336 | } | |
337 | put_bcc(byte_count, target_hdr); | |
338 | ||
339 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); | |
340 | byte_count += total_in_src; | |
341 | /* don't allow buffer to overflow */ | |
342 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
343 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); | |
344 | return -ENOBUFS; | |
345 | } | |
346 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); | |
347 | ||
348 | /* copy second buffer into end of first buffer */ | |
349 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
350 | ||
351 | if (remaining != total_in_src) { | |
352 | /* more responses to go */ | |
353 | cFYI(1, "waiting for more secondary responses"); | |
354 | return 1; | |
355 | } | |
356 | ||
357 | /* we are done */ | |
358 | cFYI(1, "found the last secondary response"); | |
359 | return 0; | |
360 | } | |
361 | ||
362 | static bool | |
363 | cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
364 | char *buf, int malformed) | |
365 | { | |
366 | if (malformed) | |
367 | return false; | |
368 | if (check2ndT2(buf) <= 0) | |
369 | return false; | |
370 | mid->multiRsp = true; | |
371 | if (mid->resp_buf) { | |
372 | /* merge response - fix up 1st*/ | |
373 | malformed = coalesce_t2(buf, mid->resp_buf); | |
374 | if (malformed > 0) | |
375 | return true; | |
376 | /* All parts received or packet is malformed. */ | |
377 | mid->multiEnd = true; | |
378 | dequeue_mid(mid, malformed); | |
379 | return true; | |
380 | } | |
381 | if (!server->large_buf) { | |
382 | /*FIXME: switch to already allocated largebuf?*/ | |
383 | cERROR(1, "1st trans2 resp needs bigbuf"); | |
384 | } else { | |
385 | /* Have first buffer */ | |
386 | mid->resp_buf = buf; | |
387 | mid->large_buf = true; | |
388 | server->bigbuf = NULL; | |
389 | } | |
390 | return true; | |
391 | } | |
392 | ||
286170aa PS |
393 | static bool |
394 | cifs_need_neg(struct TCP_Server_Info *server) | |
395 | { | |
396 | return server->maxBuf == 0; | |
397 | } | |
398 | ||
399 | static int | |
400 | cifs_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
401 | { | |
402 | int rc; | |
403 | rc = CIFSSMBNegotiate(xid, ses); | |
404 | if (rc == -EAGAIN) { | |
405 | /* retry only once on 1st time connection */ | |
406 | set_credits(ses->server, 1); | |
407 | rc = CIFSSMBNegotiate(xid, ses); | |
408 | if (rc == -EAGAIN) | |
409 | rc = -EHOSTDOWN; | |
410 | } | |
411 | return rc; | |
412 | } | |
413 | ||
24985c53 PS |
414 | static unsigned int |
415 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
416 | { | |
417 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
418 | struct TCP_Server_Info *server = tcon->ses->server; | |
419 | unsigned int wsize; | |
420 | ||
421 | /* start with specified wsize, or default */ | |
422 | if (volume_info->wsize) | |
423 | wsize = volume_info->wsize; | |
424 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
425 | wsize = CIFS_DEFAULT_IOSIZE; | |
426 | else | |
427 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
428 | ||
429 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
430 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
431 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); | |
432 | ||
433 | /* | |
434 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
435 | * Limit it to max buffer offered by the server, minus the size of the | |
436 | * WRITEX header, not including the 4 byte RFC1001 length. | |
437 | */ | |
438 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
439 | (!(server->capabilities & CAP_UNIX) && | |
440 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) | |
441 | wsize = min_t(unsigned int, wsize, | |
442 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
443 | ||
444 | /* limit to the amount that we can kmap at once */ | |
445 | wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT); | |
446 | ||
447 | /* hard limit of CIFS_MAX_WSIZE */ | |
448 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
449 | ||
450 | return wsize; | |
451 | } | |
452 | ||
453 | static unsigned int | |
454 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info) | |
455 | { | |
456 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
457 | struct TCP_Server_Info *server = tcon->ses->server; | |
458 | unsigned int rsize, defsize; | |
459 | ||
460 | /* | |
461 | * Set default value... | |
462 | * | |
463 | * HACK alert! Ancient servers have very small buffers. Even though | |
464 | * MS-CIFS indicates that servers are only limited by the client's | |
465 | * bufsize for reads, testing against win98se shows that it throws | |
466 | * INVALID_PARAMETER errors if you try to request too large a read. | |
467 | * OS/2 just sends back short reads. | |
468 | * | |
469 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that | |
470 | * it can't handle a read request larger than its MaxBufferSize either. | |
471 | */ | |
472 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
473 | defsize = CIFS_DEFAULT_IOSIZE; | |
474 | else if (server->capabilities & CAP_LARGE_READ_X) | |
475 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
476 | else | |
477 | defsize = server->maxBuf - sizeof(READ_RSP); | |
478 | ||
479 | rsize = volume_info->rsize ? volume_info->rsize : defsize; | |
480 | ||
481 | /* | |
482 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
483 | * the client's MaxBufferSize. | |
484 | */ | |
485 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
486 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
487 | ||
488 | /* limit to the amount that we can kmap at once */ | |
489 | rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT); | |
490 | ||
491 | /* hard limit of CIFS_MAX_RSIZE */ | |
492 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
493 | ||
494 | return rsize; | |
495 | } | |
496 | ||
af4281dc PS |
497 | static void |
498 | cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon) | |
499 | { | |
500 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
501 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
502 | } | |
503 | ||
68889f26 PS |
504 | static int |
505 | cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, | |
506 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
507 | { | |
508 | int rc; | |
509 | FILE_ALL_INFO *file_info; | |
510 | ||
511 | file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
512 | if (file_info == NULL) | |
513 | return -ENOMEM; | |
514 | ||
515 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info, | |
516 | 0 /* not legacy */, cifs_sb->local_nls, | |
517 | cifs_sb->mnt_cifs_flags & | |
518 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
519 | ||
520 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
521 | rc = SMBQueryInformation(xid, tcon, full_path, file_info, | |
522 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
523 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
524 | kfree(file_info); | |
525 | return rc; | |
526 | } | |
527 | ||
1208ef1f PS |
528 | static int |
529 | cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, | |
530 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
531 | FILE_ALL_INFO *data, bool *adjustTZ) | |
532 | { | |
533 | int rc; | |
534 | ||
535 | /* could do find first instead but this returns more info */ | |
536 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, | |
537 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
538 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
539 | /* | |
540 | * BB optimize code so we do not make the above call when server claims | |
541 | * no NT SMB support and the above call failed at least once - set flag | |
542 | * in tcon or mount. | |
543 | */ | |
544 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { | |
545 | rc = SMBQueryInformation(xid, tcon, full_path, data, | |
546 | cifs_sb->local_nls, | |
547 | cifs_sb->mnt_cifs_flags & | |
548 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
549 | *adjustTZ = true; | |
550 | } | |
551 | return rc; | |
552 | } | |
553 | ||
554 | static int | |
555 | cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, | |
556 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
557 | u64 *uniqueid, FILE_ALL_INFO *data) | |
558 | { | |
559 | /* | |
560 | * We can not use the IndexNumber field by default from Windows or | |
561 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
562 | * CIFS spec claims that this value is unique within the scope of a | |
563 | * share, and the windows docs hint that it's actually unique | |
564 | * per-machine. | |
565 | * | |
566 | * There may be higher info levels that work but are there Windows | |
567 | * server or network appliances for which IndexNumber field is not | |
568 | * guaranteed unique? | |
569 | */ | |
570 | return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid, | |
571 | cifs_sb->local_nls, | |
572 | cifs_sb->mnt_cifs_flags & | |
573 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
574 | } | |
575 | ||
4ad65044 PS |
576 | static int |
577 | cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, | |
578 | struct cifs_fid *fid, FILE_ALL_INFO *data) | |
579 | { | |
580 | return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); | |
581 | } | |
582 | ||
9224dfc2 PS |
583 | static char * |
584 | cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, | |
585 | struct cifs_tcon *tcon) | |
586 | { | |
587 | int pplen = vol->prepath ? strlen(vol->prepath) : 0; | |
588 | int dfsplen; | |
589 | char *full_path = NULL; | |
590 | ||
591 | /* if no prefix path, simply set path to the root of share to "" */ | |
592 | if (pplen == 0) { | |
593 | full_path = kzalloc(1, GFP_KERNEL); | |
594 | return full_path; | |
595 | } | |
596 | ||
597 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) | |
598 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); | |
599 | else | |
600 | dfsplen = 0; | |
601 | ||
602 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
603 | if (full_path == NULL) | |
604 | return full_path; | |
605 | ||
606 | if (dfsplen) | |
607 | strncpy(full_path, tcon->treeName, dfsplen); | |
608 | strncpy(full_path + dfsplen, vol->prepath, pplen); | |
609 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); | |
610 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
611 | return full_path; | |
612 | } | |
613 | ||
44c58186 PS |
614 | static void |
615 | cifs_clear_stats(struct cifs_tcon *tcon) | |
616 | { | |
617 | #ifdef CONFIG_CIFS_STATS | |
618 | atomic_set(&tcon->stats.cifs_stats.num_writes, 0); | |
619 | atomic_set(&tcon->stats.cifs_stats.num_reads, 0); | |
620 | atomic_set(&tcon->stats.cifs_stats.num_flushes, 0); | |
621 | atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0); | |
622 | atomic_set(&tcon->stats.cifs_stats.num_opens, 0); | |
623 | atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0); | |
624 | atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0); | |
625 | atomic_set(&tcon->stats.cifs_stats.num_closes, 0); | |
626 | atomic_set(&tcon->stats.cifs_stats.num_deletes, 0); | |
627 | atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0); | |
628 | atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0); | |
629 | atomic_set(&tcon->stats.cifs_stats.num_renames, 0); | |
630 | atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0); | |
631 | atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0); | |
632 | atomic_set(&tcon->stats.cifs_stats.num_fnext, 0); | |
633 | atomic_set(&tcon->stats.cifs_stats.num_fclose, 0); | |
634 | atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0); | |
635 | atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0); | |
636 | atomic_set(&tcon->stats.cifs_stats.num_locks, 0); | |
637 | atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0); | |
638 | atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0); | |
639 | #endif | |
640 | } | |
641 | ||
642 | static void | |
643 | cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon) | |
644 | { | |
645 | #ifdef CONFIG_CIFS_STATS | |
646 | seq_printf(m, " Oplocks breaks: %d", | |
647 | atomic_read(&tcon->stats.cifs_stats.num_oplock_brks)); | |
648 | seq_printf(m, "\nReads: %d Bytes: %llu", | |
649 | atomic_read(&tcon->stats.cifs_stats.num_reads), | |
650 | (long long)(tcon->bytes_read)); | |
651 | seq_printf(m, "\nWrites: %d Bytes: %llu", | |
652 | atomic_read(&tcon->stats.cifs_stats.num_writes), | |
653 | (long long)(tcon->bytes_written)); | |
654 | seq_printf(m, "\nFlushes: %d", | |
655 | atomic_read(&tcon->stats.cifs_stats.num_flushes)); | |
656 | seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d", | |
657 | atomic_read(&tcon->stats.cifs_stats.num_locks), | |
658 | atomic_read(&tcon->stats.cifs_stats.num_hardlinks), | |
659 | atomic_read(&tcon->stats.cifs_stats.num_symlinks)); | |
660 | seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d", | |
661 | atomic_read(&tcon->stats.cifs_stats.num_opens), | |
662 | atomic_read(&tcon->stats.cifs_stats.num_closes), | |
663 | atomic_read(&tcon->stats.cifs_stats.num_deletes)); | |
664 | seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d", | |
665 | atomic_read(&tcon->stats.cifs_stats.num_posixopens), | |
666 | atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs)); | |
667 | seq_printf(m, "\nMkdirs: %d Rmdirs: %d", | |
668 | atomic_read(&tcon->stats.cifs_stats.num_mkdirs), | |
669 | atomic_read(&tcon->stats.cifs_stats.num_rmdirs)); | |
670 | seq_printf(m, "\nRenames: %d T2 Renames %d", | |
671 | atomic_read(&tcon->stats.cifs_stats.num_renames), | |
672 | atomic_read(&tcon->stats.cifs_stats.num_t2renames)); | |
673 | seq_printf(m, "\nFindFirst: %d FNext %d FClose %d", | |
674 | atomic_read(&tcon->stats.cifs_stats.num_ffirst), | |
675 | atomic_read(&tcon->stats.cifs_stats.num_fnext), | |
676 | atomic_read(&tcon->stats.cifs_stats.num_fclose)); | |
677 | #endif | |
678 | } | |
679 | ||
f436720e PS |
680 | static void |
681 | cifs_mkdir_setinfo(struct inode *inode, const char *full_path, | |
682 | struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, | |
683 | const unsigned int xid) | |
684 | { | |
685 | FILE_BASIC_INFO info; | |
686 | struct cifsInodeInfo *cifsInode; | |
687 | u32 dosattrs; | |
688 | int rc; | |
689 | ||
690 | memset(&info, 0, sizeof(info)); | |
691 | cifsInode = CIFS_I(inode); | |
692 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
693 | info.Attributes = cpu_to_le32(dosattrs); | |
694 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls, | |
695 | cifs_sb->mnt_cifs_flags & | |
696 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
697 | if (rc == 0) | |
698 | cifsInode->cifsAttrs = dosattrs; | |
699 | } | |
700 | ||
fb1214e4 PS |
701 | static int |
702 | cifs_open_file(const unsigned int xid, struct cifs_tcon *tcon, const char *path, | |
703 | int disposition, int desired_access, int create_options, | |
704 | struct cifs_fid *fid, __u32 *oplock, FILE_ALL_INFO *buf, | |
705 | struct cifs_sb_info *cifs_sb) | |
706 | { | |
707 | if (!(tcon->ses->capabilities & CAP_NT_SMBS)) | |
708 | return SMBLegacyOpen(xid, tcon, path, disposition, | |
25364138 | 709 | desired_access, create_options, |
fb1214e4 PS |
710 | &fid->netfid, oplock, buf, |
711 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags | |
712 | & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
713 | return CIFSSMBOpen(xid, tcon, path, disposition, desired_access, | |
714 | create_options, &fid->netfid, oplock, buf, | |
715 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
716 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
717 | } | |
718 | ||
719 | static void | |
720 | cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) | |
721 | { | |
722 | struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); | |
723 | cfile->fid.netfid = fid->netfid; | |
724 | cifs_set_oplock_level(cinode, oplock); | |
725 | cinode->can_cache_brlcks = cinode->clientCanCacheAll; | |
726 | } | |
727 | ||
0ff78a22 PS |
728 | static int |
729 | cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon, | |
730 | struct cifs_fid *fid) | |
731 | { | |
732 | return CIFSSMBClose(xid, tcon, fid->netfid); | |
733 | } | |
734 | ||
1d8c4c00 PS |
735 | static int |
736 | cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon, | |
737 | struct cifs_fid *fid) | |
738 | { | |
739 | return CIFSSMBFlush(xid, tcon, fid->netfid); | |
740 | } | |
741 | ||
f9c6e234 PS |
742 | static int |
743 | cifs_sync_read(const unsigned int xid, struct cifsFileInfo *cfile, | |
744 | struct cifs_io_parms *parms, unsigned int *bytes_read, | |
745 | char **buf, int *buf_type) | |
746 | { | |
747 | parms->netfid = cfile->fid.netfid; | |
748 | return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type); | |
749 | } | |
750 | ||
ba9ad725 PS |
751 | static int |
752 | cifs_sync_write(const unsigned int xid, struct cifsFileInfo *cfile, | |
753 | struct cifs_io_parms *parms, unsigned int *written, | |
754 | struct kvec *iov, unsigned long nr_segs) | |
755 | { | |
756 | ||
757 | parms->netfid = cfile->fid.netfid; | |
758 | return CIFSSMBWrite2(xid, parms, written, iov, nr_segs); | |
759 | } | |
760 | ||
6bdf6dbd PS |
761 | static int |
762 | smb_set_file_info(struct inode *inode, const char *full_path, | |
763 | FILE_BASIC_INFO *buf, const unsigned int xid) | |
764 | { | |
765 | int oplock = 0; | |
766 | int rc; | |
767 | __u16 netfid; | |
768 | __u32 netpid; | |
769 | struct cifsFileInfo *open_file; | |
770 | struct cifsInodeInfo *cinode = CIFS_I(inode); | |
771 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
772 | struct tcon_link *tlink = NULL; | |
773 | struct cifs_tcon *tcon; | |
774 | FILE_BASIC_INFO info_buf; | |
775 | ||
776 | /* if the file is already open for write, just use that fileid */ | |
777 | open_file = find_writable_file(cinode, true); | |
778 | if (open_file) { | |
779 | netfid = open_file->fid.netfid; | |
780 | netpid = open_file->pid; | |
781 | tcon = tlink_tcon(open_file->tlink); | |
782 | goto set_via_filehandle; | |
783 | } | |
784 | ||
785 | tlink = cifs_sb_tlink(cifs_sb); | |
786 | if (IS_ERR(tlink)) { | |
787 | rc = PTR_ERR(tlink); | |
788 | tlink = NULL; | |
789 | goto out; | |
790 | } | |
791 | tcon = tlink_tcon(tlink); | |
792 | ||
793 | /* | |
794 | * NT4 apparently returns success on this call, but it doesn't really | |
795 | * work. | |
796 | */ | |
797 | if (!(tcon->ses->flags & CIFS_SES_NT4)) { | |
798 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, | |
799 | cifs_sb->local_nls, | |
800 | cifs_sb->mnt_cifs_flags & | |
801 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
802 | if (rc == 0) { | |
803 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
804 | goto out; | |
805 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
806 | goto out; | |
807 | } | |
808 | ||
809 | cFYI(1, "calling SetFileInfo since SetPathInfo for times not supported " | |
810 | "by this server"); | |
811 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
812 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, | |
813 | &netfid, &oplock, NULL, cifs_sb->local_nls, | |
814 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
815 | ||
816 | if (rc != 0) { | |
817 | if (rc == -EIO) | |
818 | rc = -EINVAL; | |
819 | goto out; | |
820 | } | |
821 | ||
822 | netpid = current->tgid; | |
823 | ||
824 | set_via_filehandle: | |
825 | rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid); | |
826 | if (!rc) | |
827 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
828 | ||
829 | if (open_file == NULL) | |
830 | CIFSSMBClose(xid, tcon, netfid); | |
831 | else | |
832 | cifsFileInfo_put(open_file); | |
833 | out: | |
834 | if (tlink != NULL) | |
835 | cifs_put_tlink(tlink); | |
836 | return rc; | |
837 | } | |
838 | ||
23db65f5 | 839 | struct smb_version_operations smb1_operations = { |
121b046a | 840 | .send_cancel = send_nt_cancel, |
55157dfb | 841 | .compare_fids = cifs_compare_fids, |
082d0642 | 842 | .setup_request = cifs_setup_request, |
45740847 | 843 | .setup_async_request = cifs_setup_async_request, |
082d0642 | 844 | .check_receive = cifs_check_receive, |
45275789 PS |
845 | .add_credits = cifs_add_credits, |
846 | .set_credits = cifs_set_credits, | |
847 | .get_credits_field = cifs_get_credits_field, | |
a891f0f8 | 848 | .get_credits = cifs_get_credits, |
88257360 | 849 | .get_next_mid = cifs_get_next_mid, |
eb378711 PS |
850 | .read_data_offset = cifs_read_data_offset, |
851 | .read_data_length = cifs_read_data_length, | |
852 | .map_error = map_smb_to_linux_error, | |
8aa26f3e PS |
853 | .find_mid = cifs_find_mid, |
854 | .check_message = checkSMB, | |
855 | .dump_detail = cifs_dump_detail, | |
44c58186 PS |
856 | .clear_stats = cifs_clear_stats, |
857 | .print_stats = cifs_print_stats, | |
8aa26f3e | 858 | .is_oplock_break = is_valid_oplock_break, |
316cf94a | 859 | .check_trans2 = cifs_check_trans2, |
286170aa PS |
860 | .need_neg = cifs_need_neg, |
861 | .negotiate = cifs_negotiate, | |
24985c53 PS |
862 | .negotiate_wsize = cifs_negotiate_wsize, |
863 | .negotiate_rsize = cifs_negotiate_rsize, | |
58c45c58 PS |
864 | .sess_setup = CIFS_SessSetup, |
865 | .logoff = CIFSSMBLogoff, | |
2e6e02ab PS |
866 | .tree_connect = CIFSTCon, |
867 | .tree_disconnect = CIFSSMBTDis, | |
b669f33c | 868 | .get_dfs_refer = CIFSGetDFSRefer, |
af4281dc | 869 | .qfs_tcon = cifs_qfs_tcon, |
68889f26 | 870 | .is_path_accessible = cifs_is_path_accessible, |
1208ef1f | 871 | .query_path_info = cifs_query_path_info, |
4ad65044 | 872 | .query_file_info = cifs_query_file_info, |
1208ef1f | 873 | .get_srv_inum = cifs_get_srv_inum, |
d1433418 PS |
874 | .set_path_size = CIFSSMBSetEOF, |
875 | .set_file_size = CIFSSMBSetFileSize, | |
6bdf6dbd | 876 | .set_file_info = smb_set_file_info, |
9224dfc2 | 877 | .build_path_to_root = cifs_build_path_to_root, |
f6d76178 | 878 | .echo = CIFSSMBEcho, |
f436720e PS |
879 | .mkdir = CIFSSMBMkDir, |
880 | .mkdir_setinfo = cifs_mkdir_setinfo, | |
f958ca5d | 881 | .rmdir = CIFSSMBRmDir, |
ed6875e0 PS |
882 | .unlink = CIFSSMBDelFile, |
883 | .rename_pending_delete = cifs_rename_pending_delete, | |
8ceb9843 | 884 | .rename = CIFSSMBRename, |
d6e906f1 | 885 | .create_hardlink = CIFSCreateHardLink, |
fb1214e4 PS |
886 | .open = cifs_open_file, |
887 | .set_fid = cifs_set_fid, | |
0ff78a22 | 888 | .close = cifs_close_file, |
1d8c4c00 | 889 | .flush = cifs_flush_file, |
fc9c5966 | 890 | .async_readv = cifs_async_readv, |
c9de5c80 | 891 | .async_writev = cifs_async_writev, |
f9c6e234 | 892 | .sync_read = cifs_sync_read, |
ba9ad725 | 893 | .sync_write = cifs_sync_write, |
23db65f5 JL |
894 | }; |
895 | ||
896 | struct smb_version_values smb1_values = { | |
897 | .version_string = SMB1_VERSION_STRING, | |
106dc538 PS |
898 | .large_lock_type = LOCKING_ANDX_LARGE_FILES, |
899 | .exclusive_lock_type = 0, | |
900 | .shared_lock_type = LOCKING_ANDX_SHARED_LOCK, | |
901 | .unlock_lock_type = 0, | |
1887f601 PS |
902 | .header_size = sizeof(struct smb_hdr), |
903 | .max_header_size = MAX_CIFS_HDR_SIZE, | |
eb378711 | 904 | .read_rsp_size = sizeof(READ_RSP), |
2dc7e1c0 | 905 | .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX), |
29e20f9c PS |
906 | .cap_unix = CAP_UNIX, |
907 | .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, | |
908 | .cap_large_files = CAP_LARGE_FILES, | |
23db65f5 | 909 | }; |