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b6a3d1b7 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
23db65f5 JL |
2 | /* |
3 | * SMB1 (CIFS) version specific operations | |
4 | * | |
5 | * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> | |
23db65f5 JL |
6 | */ |
7 | ||
24985c53 | 8 | #include <linux/pagemap.h> |
76ec5e33 | 9 | #include <linux/vfs.h> |
23db65f5 | 10 | #include "cifsglob.h" |
121b046a JL |
11 | #include "cifsproto.h" |
12 | #include "cifs_debug.h" | |
106dc538 | 13 | #include "cifspdu.h" |
2baa2682 | 14 | #include "cifs_unicode.h" |
3fa1c6d1 | 15 | #include "fs_context.h" |
121b046a JL |
16 | |
17 | /* | |
18 | * An NT cancel request header looks just like the original request except: | |
19 | * | |
20 | * The Command is SMB_COM_NT_CANCEL | |
21 | * The WordCount is zeroed out | |
22 | * The ByteCount is zeroed out | |
23 | * | |
24 | * This function mangles an existing request buffer into a | |
25 | * SMB_COM_NT_CANCEL request and then sends it. | |
26 | */ | |
27 | static int | |
fb2036d8 | 28 | send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst, |
121b046a JL |
29 | struct mid_q_entry *mid) |
30 | { | |
31 | int rc = 0; | |
fb2036d8 | 32 | struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base; |
121b046a JL |
33 | |
34 | /* -4 for RFC1001 length and +2 for BCC field */ | |
35 | in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2); | |
36 | in_buf->Command = SMB_COM_NT_CANCEL; | |
37 | in_buf->WordCount = 0; | |
38 | put_bcc(0, in_buf); | |
39 | ||
40 | mutex_lock(&server->srv_mutex); | |
41 | rc = cifs_sign_smb(in_buf, server, &mid->sequence_number); | |
42 | if (rc) { | |
43 | mutex_unlock(&server->srv_mutex); | |
44 | return rc; | |
45 | } | |
31efee60 JL |
46 | |
47 | /* | |
48 | * The response to this call was already factored into the sequence | |
49 | * number when the call went out, so we must adjust it back downward | |
50 | * after signing here. | |
51 | */ | |
52 | --server->sequence_number; | |
121b046a | 53 | rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length)); |
ad313cb8 JL |
54 | if (rc < 0) |
55 | server->sequence_number--; | |
56 | ||
121b046a JL |
57 | mutex_unlock(&server->srv_mutex); |
58 | ||
f96637be | 59 | cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n", |
3d378d3f | 60 | get_mid(in_buf), rc); |
121b046a JL |
61 | |
62 | return rc; | |
63 | } | |
23db65f5 | 64 | |
55157dfb PS |
65 | static bool |
66 | cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) | |
67 | { | |
4b4de76e | 68 | return ob1->fid.netfid == ob2->fid.netfid; |
55157dfb PS |
69 | } |
70 | ||
eb378711 PS |
71 | static unsigned int |
72 | cifs_read_data_offset(char *buf) | |
73 | { | |
74 | READ_RSP *rsp = (READ_RSP *)buf; | |
75 | return le16_to_cpu(rsp->DataOffset); | |
76 | } | |
77 | ||
78 | static unsigned int | |
74dcf418 | 79 | cifs_read_data_length(char *buf, bool in_remaining) |
eb378711 PS |
80 | { |
81 | READ_RSP *rsp = (READ_RSP *)buf; | |
74dcf418 LL |
82 | /* It's a bug reading remaining data for SMB1 packets */ |
83 | WARN_ON(in_remaining); | |
eb378711 PS |
84 | return (le16_to_cpu(rsp->DataLengthHigh) << 16) + |
85 | le16_to_cpu(rsp->DataLength); | |
86 | } | |
87 | ||
8aa26f3e PS |
88 | static struct mid_q_entry * |
89 | cifs_find_mid(struct TCP_Server_Info *server, char *buffer) | |
90 | { | |
91 | struct smb_hdr *buf = (struct smb_hdr *)buffer; | |
92 | struct mid_q_entry *mid; | |
93 | ||
94 | spin_lock(&GlobalMid_Lock); | |
95 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { | |
3d378d3f | 96 | if (compare_mid(mid->mid, buf) && |
8aa26f3e PS |
97 | mid->mid_state == MID_REQUEST_SUBMITTED && |
98 | le16_to_cpu(mid->command) == buf->Command) { | |
696e420b | 99 | kref_get(&mid->refcount); |
8aa26f3e PS |
100 | spin_unlock(&GlobalMid_Lock); |
101 | return mid; | |
102 | } | |
103 | } | |
104 | spin_unlock(&GlobalMid_Lock); | |
105 | return NULL; | |
106 | } | |
107 | ||
45275789 | 108 | static void |
335b7b62 PS |
109 | cifs_add_credits(struct TCP_Server_Info *server, |
110 | const struct cifs_credits *credits, const int optype) | |
45275789 PS |
111 | { |
112 | spin_lock(&server->req_lock); | |
335b7b62 | 113 | server->credits += credits->value; |
45275789 PS |
114 | server->in_flight--; |
115 | spin_unlock(&server->req_lock); | |
116 | wake_up(&server->request_q); | |
117 | } | |
118 | ||
119 | static void | |
120 | cifs_set_credits(struct TCP_Server_Info *server, const int val) | |
121 | { | |
122 | spin_lock(&server->req_lock); | |
123 | server->credits = val; | |
124 | server->oplocks = val > 1 ? enable_oplocks : false; | |
125 | spin_unlock(&server->req_lock); | |
126 | } | |
127 | ||
128 | static int * | |
a891f0f8 | 129 | cifs_get_credits_field(struct TCP_Server_Info *server, const int optype) |
45275789 PS |
130 | { |
131 | return &server->credits; | |
132 | } | |
133 | ||
a891f0f8 PS |
134 | static unsigned int |
135 | cifs_get_credits(struct mid_q_entry *mid) | |
136 | { | |
137 | return 1; | |
138 | } | |
139 | ||
88257360 PS |
140 | /* |
141 | * Find a free multiplex id (SMB mid). Otherwise there could be | |
142 | * mid collisions which might cause problems, demultiplexing the | |
143 | * wrong response to this request. Multiplex ids could collide if | |
144 | * one of a series requests takes much longer than the others, or | |
145 | * if a very large number of long lived requests (byte range | |
146 | * locks or FindNotify requests) are pending. No more than | |
147 | * 64K-1 requests can be outstanding at one time. If no | |
148 | * mids are available, return zero. A future optimization | |
149 | * could make the combination of mids and uid the key we use | |
150 | * to demultiplex on (rather than mid alone). | |
151 | * In addition to the above check, the cifs demultiplex | |
152 | * code already used the command code as a secondary | |
153 | * check of the frame and if signing is negotiated the | |
154 | * response would be discarded if the mid were the same | |
155 | * but the signature was wrong. Since the mid is not put in the | |
156 | * pending queue until later (when it is about to be dispatched) | |
157 | * we do have to limit the number of outstanding requests | |
158 | * to somewhat less than 64K-1 although it is hard to imagine | |
159 | * so many threads being in the vfs at one time. | |
160 | */ | |
161 | static __u64 | |
162 | cifs_get_next_mid(struct TCP_Server_Info *server) | |
163 | { | |
164 | __u64 mid = 0; | |
165 | __u16 last_mid, cur_mid; | |
166 | bool collision; | |
167 | ||
168 | spin_lock(&GlobalMid_Lock); | |
169 | ||
170 | /* mid is 16 bit only for CIFS/SMB */ | |
171 | cur_mid = (__u16)((server->CurrentMid) & 0xffff); | |
172 | /* we do not want to loop forever */ | |
173 | last_mid = cur_mid; | |
174 | cur_mid++; | |
03d9a9fe RBC |
175 | /* avoid 0xFFFF MID */ |
176 | if (cur_mid == 0xffff) | |
177 | cur_mid++; | |
88257360 PS |
178 | |
179 | /* | |
180 | * This nested loop looks more expensive than it is. | |
181 | * In practice the list of pending requests is short, | |
182 | * fewer than 50, and the mids are likely to be unique | |
183 | * on the first pass through the loop unless some request | |
184 | * takes longer than the 64 thousand requests before it | |
185 | * (and it would also have to have been a request that | |
186 | * did not time out). | |
187 | */ | |
188 | while (cur_mid != last_mid) { | |
189 | struct mid_q_entry *mid_entry; | |
190 | unsigned int num_mids; | |
191 | ||
192 | collision = false; | |
193 | if (cur_mid == 0) | |
194 | cur_mid++; | |
195 | ||
196 | num_mids = 0; | |
197 | list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) { | |
198 | ++num_mids; | |
199 | if (mid_entry->mid == cur_mid && | |
200 | mid_entry->mid_state == MID_REQUEST_SUBMITTED) { | |
201 | /* This mid is in use, try a different one */ | |
202 | collision = true; | |
203 | break; | |
204 | } | |
205 | } | |
206 | ||
207 | /* | |
208 | * if we have more than 32k mids in the list, then something | |
209 | * is very wrong. Possibly a local user is trying to DoS the | |
210 | * box by issuing long-running calls and SIGKILL'ing them. If | |
211 | * we get to 2^16 mids then we're in big trouble as this | |
212 | * function could loop forever. | |
213 | * | |
214 | * Go ahead and assign out the mid in this situation, but force | |
215 | * an eventual reconnect to clean out the pending_mid_q. | |
216 | */ | |
217 | if (num_mids > 32768) | |
218 | server->tcpStatus = CifsNeedReconnect; | |
219 | ||
220 | if (!collision) { | |
221 | mid = (__u64)cur_mid; | |
222 | server->CurrentMid = mid; | |
223 | break; | |
224 | } | |
225 | cur_mid++; | |
226 | } | |
227 | spin_unlock(&GlobalMid_Lock); | |
228 | return mid; | |
229 | } | |
230 | ||
316cf94a PS |
231 | /* |
232 | return codes: | |
233 | 0 not a transact2, or all data present | |
234 | >0 transact2 with that much data missing | |
235 | -EINVAL invalid transact2 | |
236 | */ | |
237 | static int | |
238 | check2ndT2(char *buf) | |
239 | { | |
240 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; | |
241 | struct smb_t2_rsp *pSMBt; | |
242 | int remaining; | |
243 | __u16 total_data_size, data_in_this_rsp; | |
244 | ||
245 | if (pSMB->Command != SMB_COM_TRANSACTION2) | |
246 | return 0; | |
247 | ||
248 | /* check for plausible wct, bcc and t2 data and parm sizes */ | |
249 | /* check for parm and data offset going beyond end of smb */ | |
250 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
a0a3036b | 251 | cifs_dbg(FYI, "Invalid transact2 word count\n"); |
316cf94a PS |
252 | return -EINVAL; |
253 | } | |
254 | ||
255 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
256 | ||
257 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
258 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
259 | ||
260 | if (total_data_size == data_in_this_rsp) | |
261 | return 0; | |
262 | else if (total_data_size < data_in_this_rsp) { | |
f96637be JP |
263 | cifs_dbg(FYI, "total data %d smaller than data in frame %d\n", |
264 | total_data_size, data_in_this_rsp); | |
316cf94a PS |
265 | return -EINVAL; |
266 | } | |
267 | ||
268 | remaining = total_data_size - data_in_this_rsp; | |
269 | ||
f96637be JP |
270 | cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n", |
271 | remaining); | |
316cf94a | 272 | if (total_data_size > CIFSMaxBufSize) { |
f96637be JP |
273 | cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n", |
274 | total_data_size, CIFSMaxBufSize); | |
316cf94a PS |
275 | return -EINVAL; |
276 | } | |
277 | return remaining; | |
278 | } | |
279 | ||
280 | static int | |
281 | coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) | |
282 | { | |
283 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; | |
284 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; | |
285 | char *data_area_of_tgt; | |
286 | char *data_area_of_src; | |
287 | int remaining; | |
288 | unsigned int byte_count, total_in_tgt; | |
289 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; | |
290 | ||
291 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); | |
292 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); | |
293 | ||
294 | if (tgt_total_cnt != src_total_cnt) | |
f96637be JP |
295 | cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n", |
296 | src_total_cnt, tgt_total_cnt); | |
316cf94a PS |
297 | |
298 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); | |
299 | ||
300 | remaining = tgt_total_cnt - total_in_tgt; | |
301 | ||
302 | if (remaining < 0) { | |
259594be | 303 | cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n", |
f96637be | 304 | tgt_total_cnt, total_in_tgt); |
316cf94a PS |
305 | return -EPROTO; |
306 | } | |
307 | ||
308 | if (remaining == 0) { | |
309 | /* nothing to do, ignore */ | |
f96637be | 310 | cifs_dbg(FYI, "no more data remains\n"); |
316cf94a PS |
311 | return 0; |
312 | } | |
313 | ||
314 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); | |
315 | if (remaining < total_in_src) | |
f96637be | 316 | cifs_dbg(FYI, "transact2 2nd response contains too much data\n"); |
316cf94a PS |
317 | |
318 | /* find end of first SMB data area */ | |
319 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + | |
320 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); | |
321 | ||
322 | /* validate target area */ | |
323 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + | |
324 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); | |
325 | ||
326 | data_area_of_tgt += total_in_tgt; | |
327 | ||
328 | total_in_tgt += total_in_src; | |
329 | /* is the result too big for the field? */ | |
330 | if (total_in_tgt > USHRT_MAX) { | |
f96637be JP |
331 | cifs_dbg(FYI, "coalesced DataCount too large (%u)\n", |
332 | total_in_tgt); | |
316cf94a PS |
333 | return -EPROTO; |
334 | } | |
335 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); | |
336 | ||
337 | /* fix up the BCC */ | |
338 | byte_count = get_bcc(target_hdr); | |
339 | byte_count += total_in_src; | |
340 | /* is the result too big for the field? */ | |
341 | if (byte_count > USHRT_MAX) { | |
f96637be | 342 | cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count); |
316cf94a PS |
343 | return -EPROTO; |
344 | } | |
345 | put_bcc(byte_count, target_hdr); | |
346 | ||
347 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); | |
348 | byte_count += total_in_src; | |
349 | /* don't allow buffer to overflow */ | |
350 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { | |
f96637be JP |
351 | cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n", |
352 | byte_count); | |
316cf94a PS |
353 | return -ENOBUFS; |
354 | } | |
355 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); | |
356 | ||
357 | /* copy second buffer into end of first buffer */ | |
358 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); | |
359 | ||
360 | if (remaining != total_in_src) { | |
361 | /* more responses to go */ | |
f96637be | 362 | cifs_dbg(FYI, "waiting for more secondary responses\n"); |
316cf94a PS |
363 | return 1; |
364 | } | |
365 | ||
366 | /* we are done */ | |
f96637be | 367 | cifs_dbg(FYI, "found the last secondary response\n"); |
316cf94a PS |
368 | return 0; |
369 | } | |
370 | ||
c11f1df5 SP |
371 | static void |
372 | cifs_downgrade_oplock(struct TCP_Server_Info *server, | |
9bd45408 PS |
373 | struct cifsInodeInfo *cinode, __u32 oplock, |
374 | unsigned int epoch, bool *purge_cache) | |
c11f1df5 | 375 | { |
9bd45408 | 376 | cifs_set_oplock_level(cinode, oplock); |
c11f1df5 SP |
377 | } |
378 | ||
316cf94a PS |
379 | static bool |
380 | cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server, | |
381 | char *buf, int malformed) | |
382 | { | |
383 | if (malformed) | |
384 | return false; | |
385 | if (check2ndT2(buf) <= 0) | |
386 | return false; | |
387 | mid->multiRsp = true; | |
388 | if (mid->resp_buf) { | |
389 | /* merge response - fix up 1st*/ | |
390 | malformed = coalesce_t2(buf, mid->resp_buf); | |
391 | if (malformed > 0) | |
392 | return true; | |
393 | /* All parts received or packet is malformed. */ | |
394 | mid->multiEnd = true; | |
395 | dequeue_mid(mid, malformed); | |
396 | return true; | |
397 | } | |
398 | if (!server->large_buf) { | |
399 | /*FIXME: switch to already allocated largebuf?*/ | |
f96637be | 400 | cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n"); |
316cf94a PS |
401 | } else { |
402 | /* Have first buffer */ | |
403 | mid->resp_buf = buf; | |
404 | mid->large_buf = true; | |
405 | server->bigbuf = NULL; | |
406 | } | |
407 | return true; | |
408 | } | |
409 | ||
286170aa PS |
410 | static bool |
411 | cifs_need_neg(struct TCP_Server_Info *server) | |
412 | { | |
413 | return server->maxBuf == 0; | |
414 | } | |
415 | ||
416 | static int | |
417 | cifs_negotiate(const unsigned int xid, struct cifs_ses *ses) | |
418 | { | |
419 | int rc; | |
420 | rc = CIFSSMBNegotiate(xid, ses); | |
421 | if (rc == -EAGAIN) { | |
422 | /* retry only once on 1st time connection */ | |
423 | set_credits(ses->server, 1); | |
424 | rc = CIFSSMBNegotiate(xid, ses); | |
425 | if (rc == -EAGAIN) | |
426 | rc = -EHOSTDOWN; | |
427 | } | |
428 | return rc; | |
429 | } | |
430 | ||
24985c53 | 431 | static unsigned int |
3fa1c6d1 | 432 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) |
24985c53 PS |
433 | { |
434 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
435 | struct TCP_Server_Info *server = tcon->ses->server; | |
436 | unsigned int wsize; | |
437 | ||
438 | /* start with specified wsize, or default */ | |
3fa1c6d1 RS |
439 | if (ctx->wsize) |
440 | wsize = ctx->wsize; | |
24985c53 PS |
441 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) |
442 | wsize = CIFS_DEFAULT_IOSIZE; | |
443 | else | |
444 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; | |
445 | ||
446 | /* can server support 24-bit write sizes? (via UNIX extensions) */ | |
447 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) | |
448 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); | |
449 | ||
450 | /* | |
451 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? | |
452 | * Limit it to max buffer offered by the server, minus the size of the | |
453 | * WRITEX header, not including the 4 byte RFC1001 length. | |
454 | */ | |
455 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || | |
38d77c50 | 456 | (!(server->capabilities & CAP_UNIX) && server->sign)) |
24985c53 PS |
457 | wsize = min_t(unsigned int, wsize, |
458 | server->maxBuf - sizeof(WRITE_REQ) + 4); | |
459 | ||
24985c53 PS |
460 | /* hard limit of CIFS_MAX_WSIZE */ |
461 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); | |
462 | ||
463 | return wsize; | |
464 | } | |
465 | ||
466 | static unsigned int | |
3fa1c6d1 | 467 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) |
24985c53 PS |
468 | { |
469 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
470 | struct TCP_Server_Info *server = tcon->ses->server; | |
471 | unsigned int rsize, defsize; | |
472 | ||
473 | /* | |
474 | * Set default value... | |
475 | * | |
476 | * HACK alert! Ancient servers have very small buffers. Even though | |
477 | * MS-CIFS indicates that servers are only limited by the client's | |
478 | * bufsize for reads, testing against win98se shows that it throws | |
479 | * INVALID_PARAMETER errors if you try to request too large a read. | |
480 | * OS/2 just sends back short reads. | |
481 | * | |
482 | * If the server doesn't advertise CAP_LARGE_READ_X, then assume that | |
483 | * it can't handle a read request larger than its MaxBufferSize either. | |
484 | */ | |
485 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) | |
486 | defsize = CIFS_DEFAULT_IOSIZE; | |
487 | else if (server->capabilities & CAP_LARGE_READ_X) | |
488 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; | |
489 | else | |
490 | defsize = server->maxBuf - sizeof(READ_RSP); | |
491 | ||
3fa1c6d1 | 492 | rsize = ctx->rsize ? ctx->rsize : defsize; |
24985c53 PS |
493 | |
494 | /* | |
495 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to | |
496 | * the client's MaxBufferSize. | |
497 | */ | |
498 | if (!(server->capabilities & CAP_LARGE_READ_X)) | |
499 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); | |
500 | ||
24985c53 PS |
501 | /* hard limit of CIFS_MAX_RSIZE */ |
502 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); | |
503 | ||
504 | return rsize; | |
505 | } | |
506 | ||
af4281dc | 507 | static void |
0f060936 AG |
508 | cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, |
509 | struct cifs_sb_info *cifs_sb) | |
af4281dc PS |
510 | { |
511 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
512 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
513 | } | |
514 | ||
68889f26 PS |
515 | static int |
516 | cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, | |
517 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
518 | { | |
519 | int rc; | |
520 | FILE_ALL_INFO *file_info; | |
521 | ||
522 | file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
523 | if (file_info == NULL) | |
524 | return -ENOMEM; | |
525 | ||
526 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info, | |
527 | 0 /* not legacy */, cifs_sb->local_nls, | |
2baa2682 | 528 | cifs_remap(cifs_sb)); |
68889f26 PS |
529 | |
530 | if (rc == -EOPNOTSUPP || rc == -EINVAL) | |
531 | rc = SMBQueryInformation(xid, tcon, full_path, file_info, | |
2baa2682 | 532 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
68889f26 PS |
533 | kfree(file_info); |
534 | return rc; | |
535 | } | |
536 | ||
1208ef1f PS |
537 | static int |
538 | cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, | |
539 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
eb85d94b | 540 | FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink) |
1208ef1f PS |
541 | { |
542 | int rc; | |
543 | ||
eb85d94b PS |
544 | *symlink = false; |
545 | ||
1208ef1f PS |
546 | /* could do find first instead but this returns more info */ |
547 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */, | |
2baa2682 | 548 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
1208ef1f PS |
549 | /* |
550 | * BB optimize code so we do not make the above call when server claims | |
551 | * no NT SMB support and the above call failed at least once - set flag | |
552 | * in tcon or mount. | |
553 | */ | |
554 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { | |
555 | rc = SMBQueryInformation(xid, tcon, full_path, data, | |
556 | cifs_sb->local_nls, | |
2baa2682 | 557 | cifs_remap(cifs_sb)); |
1208ef1f PS |
558 | *adjustTZ = true; |
559 | } | |
eb85d94b PS |
560 | |
561 | if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) { | |
562 | int tmprc; | |
563 | int oplock = 0; | |
d81b8a40 PS |
564 | struct cifs_fid fid; |
565 | struct cifs_open_parms oparms; | |
566 | ||
567 | oparms.tcon = tcon; | |
568 | oparms.cifs_sb = cifs_sb; | |
569 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
0f060936 | 570 | oparms.create_options = cifs_create_options(cifs_sb, 0); |
d81b8a40 PS |
571 | oparms.disposition = FILE_OPEN; |
572 | oparms.path = full_path; | |
573 | oparms.fid = &fid; | |
574 | oparms.reconnect = false; | |
eb85d94b PS |
575 | |
576 | /* Need to check if this is a symbolic link or not */ | |
d81b8a40 | 577 | tmprc = CIFS_open(xid, &oparms, &oplock, NULL); |
eb85d94b PS |
578 | if (tmprc == -EOPNOTSUPP) |
579 | *symlink = true; | |
19e81573 | 580 | else if (tmprc == 0) |
d81b8a40 | 581 | CIFSSMBClose(xid, tcon, fid.netfid); |
eb85d94b PS |
582 | } |
583 | ||
1208ef1f PS |
584 | return rc; |
585 | } | |
586 | ||
587 | static int | |
588 | cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, | |
589 | struct cifs_sb_info *cifs_sb, const char *full_path, | |
590 | u64 *uniqueid, FILE_ALL_INFO *data) | |
591 | { | |
592 | /* | |
593 | * We can not use the IndexNumber field by default from Windows or | |
594 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
595 | * CIFS spec claims that this value is unique within the scope of a | |
596 | * share, and the windows docs hint that it's actually unique | |
597 | * per-machine. | |
598 | * | |
599 | * There may be higher info levels that work but are there Windows | |
600 | * server or network appliances for which IndexNumber field is not | |
601 | * guaranteed unique? | |
602 | */ | |
603 | return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid, | |
604 | cifs_sb->local_nls, | |
2baa2682 | 605 | cifs_remap(cifs_sb)); |
1208ef1f PS |
606 | } |
607 | ||
4ad65044 PS |
608 | static int |
609 | cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, | |
610 | struct cifs_fid *fid, FILE_ALL_INFO *data) | |
611 | { | |
612 | return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data); | |
613 | } | |
614 | ||
44c58186 PS |
615 | static void |
616 | cifs_clear_stats(struct cifs_tcon *tcon) | |
617 | { | |
44c58186 PS |
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); | |
44c58186 PS |
639 | } |
640 | ||
641 | static void | |
642 | cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon) | |
643 | { | |
44c58186 PS |
644 | seq_printf(m, " Oplocks breaks: %d", |
645 | atomic_read(&tcon->stats.cifs_stats.num_oplock_brks)); | |
646 | seq_printf(m, "\nReads: %d Bytes: %llu", | |
647 | atomic_read(&tcon->stats.cifs_stats.num_reads), | |
648 | (long long)(tcon->bytes_read)); | |
649 | seq_printf(m, "\nWrites: %d Bytes: %llu", | |
650 | atomic_read(&tcon->stats.cifs_stats.num_writes), | |
651 | (long long)(tcon->bytes_written)); | |
652 | seq_printf(m, "\nFlushes: %d", | |
653 | atomic_read(&tcon->stats.cifs_stats.num_flushes)); | |
654 | seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d", | |
655 | atomic_read(&tcon->stats.cifs_stats.num_locks), | |
656 | atomic_read(&tcon->stats.cifs_stats.num_hardlinks), | |
657 | atomic_read(&tcon->stats.cifs_stats.num_symlinks)); | |
658 | seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d", | |
659 | atomic_read(&tcon->stats.cifs_stats.num_opens), | |
660 | atomic_read(&tcon->stats.cifs_stats.num_closes), | |
661 | atomic_read(&tcon->stats.cifs_stats.num_deletes)); | |
662 | seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d", | |
663 | atomic_read(&tcon->stats.cifs_stats.num_posixopens), | |
664 | atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs)); | |
665 | seq_printf(m, "\nMkdirs: %d Rmdirs: %d", | |
666 | atomic_read(&tcon->stats.cifs_stats.num_mkdirs), | |
667 | atomic_read(&tcon->stats.cifs_stats.num_rmdirs)); | |
668 | seq_printf(m, "\nRenames: %d T2 Renames %d", | |
669 | atomic_read(&tcon->stats.cifs_stats.num_renames), | |
670 | atomic_read(&tcon->stats.cifs_stats.num_t2renames)); | |
671 | seq_printf(m, "\nFindFirst: %d FNext %d FClose %d", | |
672 | atomic_read(&tcon->stats.cifs_stats.num_ffirst), | |
673 | atomic_read(&tcon->stats.cifs_stats.num_fnext), | |
674 | atomic_read(&tcon->stats.cifs_stats.num_fclose)); | |
44c58186 PS |
675 | } |
676 | ||
f436720e PS |
677 | static void |
678 | cifs_mkdir_setinfo(struct inode *inode, const char *full_path, | |
679 | struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, | |
680 | const unsigned int xid) | |
681 | { | |
682 | FILE_BASIC_INFO info; | |
683 | struct cifsInodeInfo *cifsInode; | |
684 | u32 dosattrs; | |
685 | int rc; | |
686 | ||
687 | memset(&info, 0, sizeof(info)); | |
688 | cifsInode = CIFS_I(inode); | |
689 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
690 | info.Attributes = cpu_to_le32(dosattrs); | |
691 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls, | |
8e408fc9 | 692 | cifs_sb); |
f436720e PS |
693 | if (rc == 0) |
694 | cifsInode->cifsAttrs = dosattrs; | |
695 | } | |
696 | ||
fb1214e4 | 697 | static int |
226730b4 PS |
698 | cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms, |
699 | __u32 *oplock, FILE_ALL_INFO *buf) | |
fb1214e4 | 700 | { |
226730b4 PS |
701 | if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS)) |
702 | return SMBLegacyOpen(xid, oparms->tcon, oparms->path, | |
703 | oparms->disposition, | |
704 | oparms->desired_access, | |
705 | oparms->create_options, | |
706 | &oparms->fid->netfid, oplock, buf, | |
707 | oparms->cifs_sb->local_nls, | |
2baa2682 | 708 | cifs_remap(oparms->cifs_sb)); |
d81b8a40 | 709 | return CIFS_open(xid, oparms, oplock, buf); |
fb1214e4 PS |
710 | } |
711 | ||
712 | static void | |
713 | cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) | |
714 | { | |
2b0143b5 | 715 | struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); |
fb1214e4 PS |
716 | cfile->fid.netfid = fid->netfid; |
717 | cifs_set_oplock_level(cinode, oplock); | |
18cceb6a | 718 | cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); |
fb1214e4 PS |
719 | } |
720 | ||
760ad0ca | 721 | static void |
0ff78a22 PS |
722 | cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon, |
723 | struct cifs_fid *fid) | |
724 | { | |
760ad0ca | 725 | CIFSSMBClose(xid, tcon, fid->netfid); |
0ff78a22 PS |
726 | } |
727 | ||
1d8c4c00 PS |
728 | static int |
729 | cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon, | |
730 | struct cifs_fid *fid) | |
731 | { | |
732 | return CIFSSMBFlush(xid, tcon, fid->netfid); | |
733 | } | |
734 | ||
f9c6e234 | 735 | static int |
db8b631d | 736 | cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid, |
f9c6e234 PS |
737 | struct cifs_io_parms *parms, unsigned int *bytes_read, |
738 | char **buf, int *buf_type) | |
739 | { | |
db8b631d | 740 | parms->netfid = pfid->netfid; |
f9c6e234 PS |
741 | return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type); |
742 | } | |
743 | ||
ba9ad725 | 744 | static int |
db8b631d | 745 | cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid, |
ba9ad725 PS |
746 | struct cifs_io_parms *parms, unsigned int *written, |
747 | struct kvec *iov, unsigned long nr_segs) | |
748 | { | |
749 | ||
db8b631d | 750 | parms->netfid = pfid->netfid; |
ba9ad725 PS |
751 | return CIFSSMBWrite2(xid, parms, written, iov, nr_segs); |
752 | } | |
753 | ||
6bdf6dbd PS |
754 | static int |
755 | smb_set_file_info(struct inode *inode, const char *full_path, | |
756 | FILE_BASIC_INFO *buf, const unsigned int xid) | |
757 | { | |
758 | int oplock = 0; | |
759 | int rc; | |
6bdf6dbd | 760 | __u32 netpid; |
d81b8a40 PS |
761 | struct cifs_fid fid; |
762 | struct cifs_open_parms oparms; | |
6bdf6dbd PS |
763 | struct cifsFileInfo *open_file; |
764 | struct cifsInodeInfo *cinode = CIFS_I(inode); | |
765 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
766 | struct tcon_link *tlink = NULL; | |
767 | struct cifs_tcon *tcon; | |
6bdf6dbd PS |
768 | |
769 | /* if the file is already open for write, just use that fileid */ | |
86f740f2 | 770 | open_file = find_writable_file(cinode, FIND_WR_FSUID_ONLY); |
6bdf6dbd | 771 | if (open_file) { |
d81b8a40 | 772 | fid.netfid = open_file->fid.netfid; |
6bdf6dbd PS |
773 | netpid = open_file->pid; |
774 | tcon = tlink_tcon(open_file->tlink); | |
775 | goto set_via_filehandle; | |
776 | } | |
777 | ||
778 | tlink = cifs_sb_tlink(cifs_sb); | |
779 | if (IS_ERR(tlink)) { | |
780 | rc = PTR_ERR(tlink); | |
781 | tlink = NULL; | |
782 | goto out; | |
783 | } | |
784 | tcon = tlink_tcon(tlink); | |
785 | ||
281e2e7d | 786 | rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls, |
8e408fc9 | 787 | cifs_sb); |
281e2e7d JL |
788 | if (rc == 0) { |
789 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
790 | goto out; | |
791 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) { | |
792 | goto out; | |
6bdf6dbd PS |
793 | } |
794 | ||
d81b8a40 PS |
795 | oparms.tcon = tcon; |
796 | oparms.cifs_sb = cifs_sb; | |
797 | oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES; | |
0f060936 | 798 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
799 | oparms.disposition = FILE_OPEN; |
800 | oparms.path = full_path; | |
801 | oparms.fid = &fid; | |
802 | oparms.reconnect = false; | |
6bdf6dbd | 803 | |
d81b8a40 PS |
804 | cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n"); |
805 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
6bdf6dbd PS |
806 | if (rc != 0) { |
807 | if (rc == -EIO) | |
808 | rc = -EINVAL; | |
809 | goto out; | |
810 | } | |
811 | ||
812 | netpid = current->tgid; | |
813 | ||
814 | set_via_filehandle: | |
d81b8a40 | 815 | rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid); |
6bdf6dbd PS |
816 | if (!rc) |
817 | cinode->cifsAttrs = le32_to_cpu(buf->Attributes); | |
818 | ||
819 | if (open_file == NULL) | |
d81b8a40 | 820 | CIFSSMBClose(xid, tcon, fid.netfid); |
6bdf6dbd PS |
821 | else |
822 | cifsFileInfo_put(open_file); | |
823 | out: | |
824 | if (tlink != NULL) | |
825 | cifs_put_tlink(tlink); | |
826 | return rc; | |
827 | } | |
828 | ||
c7f508a9 SF |
829 | static int |
830 | cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon, | |
831 | struct cifsFileInfo *cfile) | |
832 | { | |
833 | return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid); | |
834 | } | |
835 | ||
92fc65a7 PS |
836 | static int |
837 | cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, | |
838 | const char *path, struct cifs_sb_info *cifs_sb, | |
839 | struct cifs_fid *fid, __u16 search_flags, | |
840 | struct cifs_search_info *srch_inf) | |
841 | { | |
dcd87838 PS |
842 | int rc; |
843 | ||
844 | rc = CIFSFindFirst(xid, tcon, path, cifs_sb, | |
845 | &fid->netfid, search_flags, srch_inf, true); | |
846 | if (rc) | |
847 | cifs_dbg(FYI, "find first failed=%d\n", rc); | |
848 | return rc; | |
92fc65a7 PS |
849 | } |
850 | ||
851 | static int | |
852 | cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, | |
853 | struct cifs_fid *fid, __u16 search_flags, | |
854 | struct cifs_search_info *srch_inf) | |
855 | { | |
856 | return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf); | |
857 | } | |
858 | ||
859 | static int | |
860 | cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon, | |
861 | struct cifs_fid *fid) | |
862 | { | |
863 | return CIFSFindClose(xid, tcon, fid->netfid); | |
864 | } | |
865 | ||
95a3f2f3 PS |
866 | static int |
867 | cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid, | |
868 | struct cifsInodeInfo *cinode) | |
869 | { | |
870 | return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0, | |
871 | LOCKING_ANDX_OPLOCK_RELEASE, false, | |
18cceb6a | 872 | CIFS_CACHE_READ(cinode) ? 1 : 0); |
95a3f2f3 PS |
873 | } |
874 | ||
76ec5e33 PS |
875 | static int |
876 | cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon, | |
0f060936 | 877 | struct cifs_sb_info *cifs_sb, struct kstatfs *buf) |
76ec5e33 PS |
878 | { |
879 | int rc = -EOPNOTSUPP; | |
880 | ||
881 | buf->f_type = CIFS_MAGIC_NUMBER; | |
882 | ||
883 | /* | |
884 | * We could add a second check for a QFS Unix capability bit | |
885 | */ | |
886 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
887 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
888 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
889 | ||
890 | /* | |
891 | * Only need to call the old QFSInfo if failed on newer one, | |
892 | * e.g. by OS/2. | |
893 | **/ | |
894 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
895 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
896 | ||
897 | /* | |
898 | * Some old Windows servers also do not support level 103, retry with | |
899 | * older level one if old server failed the previous call or we | |
900 | * bypassed it because we detected that this was an older LANMAN sess | |
901 | */ | |
902 | if (rc) | |
903 | rc = SMBOldQFSInfo(xid, tcon, buf); | |
904 | return rc; | |
905 | } | |
906 | ||
d39a4f71 PS |
907 | static int |
908 | cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, | |
909 | __u64 length, __u32 type, int lock, int unlock, bool wait) | |
910 | { | |
911 | return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid, | |
912 | current->tgid, length, offset, unlock, lock, | |
913 | (__u8)type, wait, 0); | |
914 | } | |
915 | ||
924e3fa4 SP |
916 | static int |
917 | cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon, | |
918 | const unsigned char *searchName, char **symlinkinfo, | |
919 | const struct nls_table *nls_codepage) | |
920 | { | |
921 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
922 | int rc; | |
1c780228 | 923 | struct dfs_info3_param referral = {0}; |
924e3fa4 | 924 | |
1c780228 PA |
925 | rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral, |
926 | 0); | |
924e3fa4 | 927 | |
1c780228 PA |
928 | if (!rc) { |
929 | *symlinkinfo = kstrndup(referral.node_name, | |
930 | strlen(referral.node_name), | |
924e3fa4 | 931 | GFP_KERNEL); |
1c780228 | 932 | free_dfs_info_param(&referral); |
924e3fa4 SP |
933 | if (!*symlinkinfo) |
934 | rc = -ENOMEM; | |
924e3fa4 SP |
935 | } |
936 | return rc; | |
937 | #else /* No DFS support */ | |
938 | return -EREMOTE; | |
939 | #endif | |
940 | } | |
941 | ||
d244bf2d PS |
942 | static int |
943 | cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, | |
ebaf546a RS |
944 | struct cifs_sb_info *cifs_sb, const char *full_path, |
945 | char **target_path, bool is_reparse_point) | |
d244bf2d PS |
946 | { |
947 | int rc; | |
948 | int oplock = 0; | |
d81b8a40 PS |
949 | struct cifs_fid fid; |
950 | struct cifs_open_parms oparms; | |
d244bf2d PS |
951 | |
952 | cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); | |
953 | ||
ebaf546a RS |
954 | if (is_reparse_point) { |
955 | cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n"); | |
956 | return -EOPNOTSUPP; | |
957 | } | |
958 | ||
0ecdb4f5 SP |
959 | /* Check for unix extensions */ |
960 | if (cap_unix(tcon->ses)) { | |
961 | rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path, | |
bc8ebdc4 NA |
962 | cifs_sb->local_nls, |
963 | cifs_remap(cifs_sb)); | |
924e3fa4 SP |
964 | if (rc == -EREMOTE) |
965 | rc = cifs_unix_dfs_readlink(xid, tcon, full_path, | |
966 | target_path, | |
967 | cifs_sb->local_nls); | |
968 | ||
0ecdb4f5 SP |
969 | goto out; |
970 | } | |
971 | ||
d81b8a40 PS |
972 | oparms.tcon = tcon; |
973 | oparms.cifs_sb = cifs_sb; | |
974 | oparms.desired_access = FILE_READ_ATTRIBUTES; | |
0f060936 AG |
975 | oparms.create_options = cifs_create_options(cifs_sb, |
976 | OPEN_REPARSE_POINT); | |
d81b8a40 PS |
977 | oparms.disposition = FILE_OPEN; |
978 | oparms.path = full_path; | |
979 | oparms.fid = &fid; | |
980 | oparms.reconnect = false; | |
981 | ||
982 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
d244bf2d | 983 | if (rc) |
0ecdb4f5 | 984 | goto out; |
d244bf2d | 985 | |
d81b8a40 | 986 | rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path, |
d244bf2d | 987 | cifs_sb->local_nls); |
0ecdb4f5 SP |
988 | if (rc) |
989 | goto out_close; | |
d244bf2d PS |
990 | |
991 | convert_delimiter(*target_path, '/'); | |
0ecdb4f5 | 992 | out_close: |
d81b8a40 | 993 | CIFSSMBClose(xid, tcon, fid.netfid); |
0ecdb4f5 SP |
994 | out: |
995 | if (!rc) | |
996 | cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path); | |
d244bf2d PS |
997 | return rc; |
998 | } | |
999 | ||
53ef1016 PS |
1000 | static bool |
1001 | cifs_is_read_op(__u32 oplock) | |
1002 | { | |
1003 | return oplock == OPLOCK_READ; | |
1004 | } | |
1005 | ||
7f6c5008 PS |
1006 | static unsigned int |
1007 | cifs_wp_retry_size(struct inode *inode) | |
1008 | { | |
1009 | return CIFS_SB(inode->i_sb)->wsize; | |
1010 | } | |
1011 | ||
52755808 PS |
1012 | static bool |
1013 | cifs_dir_needs_close(struct cifsFileInfo *cfile) | |
1014 | { | |
1015 | return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle; | |
1016 | } | |
1017 | ||
62a6cfdd SP |
1018 | static bool |
1019 | cifs_can_echo(struct TCP_Server_Info *server) | |
1020 | { | |
1021 | if (server->tcpStatus == CifsGood) | |
1022 | return true; | |
1023 | ||
1024 | return false; | |
1025 | } | |
1026 | ||
c847dccf AA |
1027 | static int |
1028 | cifs_make_node(unsigned int xid, struct inode *inode, | |
1029 | struct dentry *dentry, struct cifs_tcon *tcon, | |
1030 | char *full_path, umode_t mode, dev_t dev) | |
1031 | { | |
1032 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1033 | struct inode *newinode = NULL; | |
1034 | int rc = -EPERM; | |
c847dccf AA |
1035 | FILE_ALL_INFO *buf = NULL; |
1036 | struct cifs_io_parms io_parms; | |
1037 | __u32 oplock = 0; | |
1038 | struct cifs_fid fid; | |
1039 | struct cifs_open_parms oparms; | |
1040 | unsigned int bytes_written; | |
1041 | struct win_dev *pdev; | |
1042 | struct kvec iov[2]; | |
1043 | ||
1044 | if (tcon->unix_ext) { | |
1045 | /* | |
1046 | * SMB1 Unix Extensions: requires server support but | |
1047 | * works with all special files | |
1048 | */ | |
1049 | struct cifs_unix_set_info_args args = { | |
1050 | .mode = mode & ~current_umask(), | |
1051 | .ctime = NO_CHANGE_64, | |
1052 | .atime = NO_CHANGE_64, | |
1053 | .mtime = NO_CHANGE_64, | |
1054 | .device = dev, | |
1055 | }; | |
1056 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1057 | args.uid = current_fsuid(); | |
1058 | args.gid = current_fsgid(); | |
1059 | } else { | |
1060 | args.uid = INVALID_UID; /* no change */ | |
1061 | args.gid = INVALID_GID; /* no change */ | |
1062 | } | |
1063 | rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1064 | cifs_sb->local_nls, | |
1065 | cifs_remap(cifs_sb)); | |
1066 | if (rc) | |
1067 | goto out; | |
1068 | ||
1069 | rc = cifs_get_inode_info_unix(&newinode, full_path, | |
1070 | inode->i_sb, xid); | |
1071 | ||
1072 | if (rc == 0) | |
1073 | d_instantiate(dentry, newinode); | |
1074 | goto out; | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * SMB1 SFU emulation: should work with all servers, but only | |
1079 | * support block and char device (no socket & fifo) | |
1080 | */ | |
1081 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) | |
1082 | goto out; | |
1083 | ||
1084 | if (!S_ISCHR(mode) && !S_ISBLK(mode)) | |
1085 | goto out; | |
1086 | ||
1087 | cifs_dbg(FYI, "sfu compat create special file\n"); | |
1088 | ||
1089 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
1090 | if (buf == NULL) { | |
1091 | rc = -ENOMEM; | |
1092 | goto out; | |
1093 | } | |
1094 | ||
c847dccf AA |
1095 | oparms.tcon = tcon; |
1096 | oparms.cifs_sb = cifs_sb; | |
1097 | oparms.desired_access = GENERIC_WRITE; | |
0f060936 AG |
1098 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR | |
1099 | CREATE_OPTION_SPECIAL); | |
c847dccf AA |
1100 | oparms.disposition = FILE_CREATE; |
1101 | oparms.path = full_path; | |
1102 | oparms.fid = &fid; | |
1103 | oparms.reconnect = false; | |
1104 | ||
1105 | if (tcon->ses->server->oplocks) | |
1106 | oplock = REQ_OPLOCK; | |
1107 | else | |
1108 | oplock = 0; | |
1109 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf); | |
1110 | if (rc) | |
1111 | goto out; | |
1112 | ||
1113 | /* | |
1114 | * BB Do not bother to decode buf since no local inode yet to put | |
1115 | * timestamps in, but we can reuse it safely. | |
1116 | */ | |
1117 | ||
1118 | pdev = (struct win_dev *)buf; | |
1119 | io_parms.pid = current->tgid; | |
1120 | io_parms.tcon = tcon; | |
1121 | io_parms.offset = 0; | |
1122 | io_parms.length = sizeof(struct win_dev); | |
1123 | iov[1].iov_base = buf; | |
1124 | iov[1].iov_len = sizeof(struct win_dev); | |
1125 | if (S_ISCHR(mode)) { | |
1126 | memcpy(pdev->type, "IntxCHR", 8); | |
1127 | pdev->major = cpu_to_le64(MAJOR(dev)); | |
1128 | pdev->minor = cpu_to_le64(MINOR(dev)); | |
1129 | rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, | |
1130 | &bytes_written, iov, 1); | |
1131 | } else if (S_ISBLK(mode)) { | |
1132 | memcpy(pdev->type, "IntxBLK", 8); | |
1133 | pdev->major = cpu_to_le64(MAJOR(dev)); | |
1134 | pdev->minor = cpu_to_le64(MINOR(dev)); | |
1135 | rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms, | |
1136 | &bytes_written, iov, 1); | |
1137 | } | |
1138 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
1139 | d_drop(dentry); | |
1140 | ||
1141 | /* FIXME: add code here to set EAs */ | |
1142 | out: | |
1143 | kfree(buf); | |
1144 | return rc; | |
1145 | } | |
1146 | ||
1147 | ||
1148 | ||
23db65f5 | 1149 | struct smb_version_operations smb1_operations = { |
121b046a | 1150 | .send_cancel = send_nt_cancel, |
55157dfb | 1151 | .compare_fids = cifs_compare_fids, |
082d0642 | 1152 | .setup_request = cifs_setup_request, |
45740847 | 1153 | .setup_async_request = cifs_setup_async_request, |
082d0642 | 1154 | .check_receive = cifs_check_receive, |
45275789 PS |
1155 | .add_credits = cifs_add_credits, |
1156 | .set_credits = cifs_set_credits, | |
1157 | .get_credits_field = cifs_get_credits_field, | |
a891f0f8 | 1158 | .get_credits = cifs_get_credits, |
cb7e9eab | 1159 | .wait_mtu_credits = cifs_wait_mtu_credits, |
88257360 | 1160 | .get_next_mid = cifs_get_next_mid, |
eb378711 PS |
1161 | .read_data_offset = cifs_read_data_offset, |
1162 | .read_data_length = cifs_read_data_length, | |
1163 | .map_error = map_smb_to_linux_error, | |
8aa26f3e PS |
1164 | .find_mid = cifs_find_mid, |
1165 | .check_message = checkSMB, | |
1166 | .dump_detail = cifs_dump_detail, | |
44c58186 PS |
1167 | .clear_stats = cifs_clear_stats, |
1168 | .print_stats = cifs_print_stats, | |
8aa26f3e | 1169 | .is_oplock_break = is_valid_oplock_break, |
c11f1df5 | 1170 | .downgrade_oplock = cifs_downgrade_oplock, |
316cf94a | 1171 | .check_trans2 = cifs_check_trans2, |
286170aa PS |
1172 | .need_neg = cifs_need_neg, |
1173 | .negotiate = cifs_negotiate, | |
24985c53 PS |
1174 | .negotiate_wsize = cifs_negotiate_wsize, |
1175 | .negotiate_rsize = cifs_negotiate_rsize, | |
58c45c58 PS |
1176 | .sess_setup = CIFS_SessSetup, |
1177 | .logoff = CIFSSMBLogoff, | |
2e6e02ab PS |
1178 | .tree_connect = CIFSTCon, |
1179 | .tree_disconnect = CIFSSMBTDis, | |
b669f33c | 1180 | .get_dfs_refer = CIFSGetDFSRefer, |
af4281dc | 1181 | .qfs_tcon = cifs_qfs_tcon, |
68889f26 | 1182 | .is_path_accessible = cifs_is_path_accessible, |
62a6cfdd | 1183 | .can_echo = cifs_can_echo, |
1208ef1f | 1184 | .query_path_info = cifs_query_path_info, |
4ad65044 | 1185 | .query_file_info = cifs_query_file_info, |
1208ef1f | 1186 | .get_srv_inum = cifs_get_srv_inum, |
d1433418 PS |
1187 | .set_path_size = CIFSSMBSetEOF, |
1188 | .set_file_size = CIFSSMBSetFileSize, | |
6bdf6dbd | 1189 | .set_file_info = smb_set_file_info, |
c7f508a9 | 1190 | .set_compression = cifs_set_compression, |
f6d76178 | 1191 | .echo = CIFSSMBEcho, |
f436720e PS |
1192 | .mkdir = CIFSSMBMkDir, |
1193 | .mkdir_setinfo = cifs_mkdir_setinfo, | |
f958ca5d | 1194 | .rmdir = CIFSSMBRmDir, |
ed6875e0 PS |
1195 | .unlink = CIFSSMBDelFile, |
1196 | .rename_pending_delete = cifs_rename_pending_delete, | |
8ceb9843 | 1197 | .rename = CIFSSMBRename, |
d6e906f1 | 1198 | .create_hardlink = CIFSCreateHardLink, |
d244bf2d | 1199 | .query_symlink = cifs_query_symlink, |
fb1214e4 PS |
1200 | .open = cifs_open_file, |
1201 | .set_fid = cifs_set_fid, | |
0ff78a22 | 1202 | .close = cifs_close_file, |
1d8c4c00 | 1203 | .flush = cifs_flush_file, |
fc9c5966 | 1204 | .async_readv = cifs_async_readv, |
c9de5c80 | 1205 | .async_writev = cifs_async_writev, |
f9c6e234 | 1206 | .sync_read = cifs_sync_read, |
ba9ad725 | 1207 | .sync_write = cifs_sync_write, |
92fc65a7 PS |
1208 | .query_dir_first = cifs_query_dir_first, |
1209 | .query_dir_next = cifs_query_dir_next, | |
1210 | .close_dir = cifs_close_dir, | |
1211 | .calc_smb_size = smbCalcSize, | |
95a3f2f3 | 1212 | .oplock_response = cifs_oplock_response, |
76ec5e33 | 1213 | .queryfs = cifs_queryfs, |
d39a4f71 PS |
1214 | .mand_lock = cifs_mand_lock, |
1215 | .mand_unlock_range = cifs_unlock_range, | |
1216 | .push_mand_locks = cifs_push_mandatory_locks, | |
b5be1a1c | 1217 | .query_mf_symlink = cifs_query_mf_symlink, |
cbb0aba6 | 1218 | .create_mf_symlink = cifs_create_mf_symlink, |
53ef1016 | 1219 | .is_read_op = cifs_is_read_op, |
7f6c5008 | 1220 | .wp_retry_size = cifs_wp_retry_size, |
52755808 | 1221 | .dir_needs_close = cifs_dir_needs_close, |
ef65aaed | 1222 | .select_sectype = cifs_select_sectype, |
d979f3b0 SF |
1223 | #ifdef CONFIG_CIFS_XATTR |
1224 | .query_all_EAs = CIFSSMBQAllEAs, | |
1225 | .set_EA = CIFSSMBSetEA, | |
1226 | #endif /* CIFS_XATTR */ | |
83e3bc23 | 1227 | .get_acl = get_cifs_acl, |
42eacf9e | 1228 | .get_acl_by_fid = get_cifs_acl_by_fid, |
83e3bc23 | 1229 | .set_acl = set_cifs_acl, |
c847dccf | 1230 | .make_node = cifs_make_node, |
23db65f5 JL |
1231 | }; |
1232 | ||
1233 | struct smb_version_values smb1_values = { | |
1234 | .version_string = SMB1_VERSION_STRING, | |
43cdae88 | 1235 | .protocol_id = SMB10_PROT_ID, |
106dc538 PS |
1236 | .large_lock_type = LOCKING_ANDX_LARGE_FILES, |
1237 | .exclusive_lock_type = 0, | |
1238 | .shared_lock_type = LOCKING_ANDX_SHARED_LOCK, | |
1239 | .unlock_lock_type = 0, | |
93012bf9 | 1240 | .header_preamble_size = 4, |
1887f601 PS |
1241 | .header_size = sizeof(struct smb_hdr), |
1242 | .max_header_size = MAX_CIFS_HDR_SIZE, | |
eb378711 | 1243 | .read_rsp_size = sizeof(READ_RSP), |
2dc7e1c0 | 1244 | .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX), |
29e20f9c PS |
1245 | .cap_unix = CAP_UNIX, |
1246 | .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND, | |
1247 | .cap_large_files = CAP_LARGE_FILES, | |
50285882 JL |
1248 | .signing_enabled = SECMODE_SIGN_ENABLED, |
1249 | .signing_required = SECMODE_SIGN_REQUIRED, | |
23db65f5 | 1250 | }; |