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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[wrt350n-kernel.git] / fs / cifs / cifssmb.c
blob30bbe448e260fa931a2a36098057bfdd8364fad3
1 /*
2 * fs/cifs/cifssmb.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * Contains the routines for constructing the SMB PDUs themselves
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 /* SMB/CIFS PDU handling routines here - except for leftovers in connect.c */
25 /* These are mostly routines that operate on a pathname, or on a tree id */
26 /* (mounted volume), but there are eight handle based routines which must be */
27 /* treated slightly differently for reconnection purposes since we never */
28 /* want to reuse a stale file handle and only the caller knows the file info */
29
30 #include <linux/fs.h>
31 #include <linux/kernel.h>
32 #include <linux/vfs.h>
33 #include <linux/posix_acl_xattr.h>
34 #include <asm/uaccess.h>
35 #include "cifspdu.h"
36 #include "cifsglob.h"
37 #include "cifsacl.h"
38 #include "cifsproto.h"
39 #include "cifs_unicode.h"
40 #include "cifs_debug.h"
41
42 #ifdef CONFIG_CIFS_POSIX
43 static struct {
44 int index;
45 char *name;
46 } protocols[] = {
47 #ifdef CONFIG_CIFS_WEAK_PW_HASH
48 {LANMAN_PROT, "\2LM1.2X002"},
49 {LANMAN2_PROT, "\2LANMAN2.1"},
50 #endif /* weak password hashing for legacy clients */
51 {CIFS_PROT, "\2NT LM 0.12"},
52 {POSIX_PROT, "\2POSIX 2"},
53 {BAD_PROT, "\2"}
54 };
55 #else
56 static struct {
57 int index;
58 char *name;
59 } protocols[] = {
60 #ifdef CONFIG_CIFS_WEAK_PW_HASH
61 {LANMAN_PROT, "\2LM1.2X002"},
62 {LANMAN2_PROT, "\2LANMAN2.1"},
63 #endif /* weak password hashing for legacy clients */
64 {CIFS_PROT, "\2NT LM 0.12"},
65 {BAD_PROT, "\2"}
66 };
67 #endif
68
69 /* define the number of elements in the cifs dialect array */
70 #ifdef CONFIG_CIFS_POSIX
71 #ifdef CONFIG_CIFS_WEAK_PW_HASH
72 #define CIFS_NUM_PROT 4
73 #else
74 #define CIFS_NUM_PROT 2
75 #endif /* CIFS_WEAK_PW_HASH */
76 #else /* not posix */
77 #ifdef CONFIG_CIFS_WEAK_PW_HASH
78 #define CIFS_NUM_PROT 3
79 #else
80 #define CIFS_NUM_PROT 1
81 #endif /* CONFIG_CIFS_WEAK_PW_HASH */
82 #endif /* CIFS_POSIX */
83
84
85 /* Mark as invalid, all open files on tree connections since they
86 were closed when session to server was lost */
87 static void mark_open_files_invalid(struct cifsTconInfo *pTcon)
88 {
89 struct cifsFileInfo *open_file = NULL;
90 struct list_head *tmp;
91 struct list_head *tmp1;
92
93 /* list all files open on tree connection and mark them invalid */
94 write_lock(&GlobalSMBSeslock);
95 list_for_each_safe(tmp, tmp1, &pTcon->openFileList) {
96 open_file = list_entry(tmp, struct cifsFileInfo, tlist);
97 if (open_file)
98 open_file->invalidHandle = TRUE;
99 }
100 write_unlock(&GlobalSMBSeslock);
101 /* BB Add call to invalidate_inodes(sb) for all superblocks mounted
102 to this tcon */
103 }
104
105 /* Allocate and return pointer to an SMB request buffer, and set basic
106 SMB information in the SMB header. If the return code is zero, this
107 function must have filled in request_buf pointer */
108 static int
109 small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
110 void **request_buf)
111 {
112 int rc = 0;
113
114 /* SMBs NegProt, SessSetup, uLogoff do not have tcon yet so
115 check for tcp and smb session status done differently
116 for those three - in the calling routine */
117 if (tcon) {
118 if (tcon->tidStatus == CifsExiting) {
119 /* only tree disconnect, open, and write,
120 (and ulogoff which does not have tcon)
121 are allowed as we start force umount */
122 if ((smb_command != SMB_COM_WRITE_ANDX) &&
123 (smb_command != SMB_COM_OPEN_ANDX) &&
124 (smb_command != SMB_COM_TREE_DISCONNECT)) {
125 cFYI(1, ("can not send cmd %d while umounting",
126 smb_command));
127 return -ENODEV;
128 }
129 }
130 if ((tcon->ses) && (tcon->ses->status != CifsExiting) &&
131 (tcon->ses->server)) {
132 struct nls_table *nls_codepage;
133 /* Give Demultiplex thread up to 10 seconds to
134 reconnect, should be greater than cifs socket
135 timeout which is 7 seconds */
136 while (tcon->ses->server->tcpStatus ==
137 CifsNeedReconnect) {
138 wait_event_interruptible_timeout(tcon->ses->server->response_q,
139 (tcon->ses->server->tcpStatus ==
140 CifsGood), 10 * HZ);
141 if (tcon->ses->server->tcpStatus ==
142 CifsNeedReconnect) {
143 /* on "soft" mounts we wait once */
144 if ((tcon->retry == FALSE) ||
145 (tcon->ses->status == CifsExiting)) {
146 cFYI(1, ("gave up waiting on "
147 "reconnect in smb_init"));
148 return -EHOSTDOWN;
149 } /* else "hard" mount - keep retrying
150 until process is killed or server
151 comes back on-line */
152 } else /* TCP session is reestablished now */
153 break;
154 }
155
156 nls_codepage = load_nls_default();
157 /* need to prevent multiple threads trying to
158 simultaneously reconnect the same SMB session */
159 down(&tcon->ses->sesSem);
160 if (tcon->ses->status == CifsNeedReconnect)
161 rc = cifs_setup_session(0, tcon->ses,
162 nls_codepage);
163 if (!rc && (tcon->tidStatus == CifsNeedReconnect)) {
164 mark_open_files_invalid(tcon);
165 rc = CIFSTCon(0, tcon->ses, tcon->treeName,
166 tcon, nls_codepage);
167 up(&tcon->ses->sesSem);
168 /* tell server which Unix caps we support */
169 if (tcon->ses->capabilities & CAP_UNIX)
170 reset_cifs_unix_caps(0 /* no xid */,
171 tcon,
172 NULL /* we do not know sb */,
173 NULL /* no vol info */);
174 /* BB FIXME add code to check if wsize needs
175 update due to negotiated smb buffer size
176 shrinking */
177 if (rc == 0)
178 atomic_inc(&tconInfoReconnectCount);
179
180 cFYI(1, ("reconnect tcon rc = %d", rc));
181 /* Removed call to reopen open files here.
182 It is safer (and faster) to reopen files
183 one at a time as needed in read and write */
184
185 /* Check if handle based operation so we
186 know whether we can continue or not without
187 returning to caller to reset file handle */
188 switch (smb_command) {
189 case SMB_COM_READ_ANDX:
190 case SMB_COM_WRITE_ANDX:
191 case SMB_COM_CLOSE:
192 case SMB_COM_FIND_CLOSE2:
193 case SMB_COM_LOCKING_ANDX: {
194 unload_nls(nls_codepage);
195 return -EAGAIN;
196 }
197 }
198 } else {
199 up(&tcon->ses->sesSem);
200 }
201 unload_nls(nls_codepage);
202
203 } else {
204 return -EIO;
205 }
206 }
207 if (rc)
208 return rc;
209
210 *request_buf = cifs_small_buf_get();
211 if (*request_buf == NULL) {
212 /* BB should we add a retry in here if not a writepage? */
213 return -ENOMEM;
214 }
215
216 header_assemble((struct smb_hdr *) *request_buf, smb_command,
217 tcon, wct);
218
219 if (tcon != NULL)
220 cifs_stats_inc(&tcon->num_smbs_sent);
221
222 return rc;
223 }
224
225 int
226 small_smb_init_no_tc(const int smb_command, const int wct,
227 struct cifsSesInfo *ses, void **request_buf)
228 {
229 int rc;
230 struct smb_hdr *buffer;
231
232 rc = small_smb_init(smb_command, wct, NULL, request_buf);
233 if (rc)
234 return rc;
235
236 buffer = (struct smb_hdr *)*request_buf;
237 buffer->Mid = GetNextMid(ses->server);
238 if (ses->capabilities & CAP_UNICODE)
239 buffer->Flags2 |= SMBFLG2_UNICODE;
240 if (ses->capabilities & CAP_STATUS32)
241 buffer->Flags2 |= SMBFLG2_ERR_STATUS;
242
243 /* uid, tid can stay at zero as set in header assemble */
244
245 /* BB add support for turning on the signing when
246 this function is used after 1st of session setup requests */
247
248 return rc;
249 }
250
251 /* If the return code is zero, this function must fill in request_buf pointer */
252 static int
253 smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
254 void **request_buf /* returned */ ,
255 void **response_buf /* returned */ )
256 {
257 int rc = 0;
258
259 /* SMBs NegProt, SessSetup, uLogoff do not have tcon yet so
260 check for tcp and smb session status done differently
261 for those three - in the calling routine */
262 if (tcon) {
263 if (tcon->tidStatus == CifsExiting) {
264 /* only tree disconnect, open, and write,
265 (and ulogoff which does not have tcon)
266 are allowed as we start force umount */
267 if ((smb_command != SMB_COM_WRITE_ANDX) &&
268 (smb_command != SMB_COM_OPEN_ANDX) &&
269 (smb_command != SMB_COM_TREE_DISCONNECT)) {
270 cFYI(1, ("can not send cmd %d while umounting",
271 smb_command));
272 return -ENODEV;
273 }
274 }
275
276 if ((tcon->ses) && (tcon->ses->status != CifsExiting) &&
277 (tcon->ses->server)) {
278 struct nls_table *nls_codepage;
279 /* Give Demultiplex thread up to 10 seconds to
280 reconnect, should be greater than cifs socket
281 timeout which is 7 seconds */
282 while (tcon->ses->server->tcpStatus ==
283 CifsNeedReconnect) {
284 wait_event_interruptible_timeout(tcon->ses->server->response_q,
285 (tcon->ses->server->tcpStatus ==
286 CifsGood), 10 * HZ);
287 if (tcon->ses->server->tcpStatus ==
288 CifsNeedReconnect) {
289 /* on "soft" mounts we wait once */
290 if ((tcon->retry == FALSE) ||
291 (tcon->ses->status == CifsExiting)) {
292 cFYI(1, ("gave up waiting on "
293 "reconnect in smb_init"));
294 return -EHOSTDOWN;
295 } /* else "hard" mount - keep retrying
296 until process is killed or server
297 comes on-line */
298 } else /* TCP session is reestablished now */
299 break;
300 }
301 nls_codepage = load_nls_default();
302 /* need to prevent multiple threads trying to
303 simultaneously reconnect the same SMB session */
304 down(&tcon->ses->sesSem);
305 if (tcon->ses->status == CifsNeedReconnect)
306 rc = cifs_setup_session(0, tcon->ses,
307 nls_codepage);
308 if (!rc && (tcon->tidStatus == CifsNeedReconnect)) {
309 mark_open_files_invalid(tcon);
310 rc = CIFSTCon(0, tcon->ses, tcon->treeName,
311 tcon, nls_codepage);
312 up(&tcon->ses->sesSem);
313 /* tell server which Unix caps we support */
314 if (tcon->ses->capabilities & CAP_UNIX)
315 reset_cifs_unix_caps(0 /* no xid */,
316 tcon,
317 NULL /* do not know sb */,
318 NULL /* no vol info */);
319 /* BB FIXME add code to check if wsize needs
320 update due to negotiated smb buffer size
321 shrinking */
322 if (rc == 0)
323 atomic_inc(&tconInfoReconnectCount);
324
325 cFYI(1, ("reconnect tcon rc = %d", rc));
326 /* Removed call to reopen open files here.
327 It is safer (and faster) to reopen files
328 one at a time as needed in read and write */
329
330 /* Check if handle based operation so we
331 know whether we can continue or not without
332 returning to caller to reset file handle */
333 switch (smb_command) {
334 case SMB_COM_READ_ANDX:
335 case SMB_COM_WRITE_ANDX:
336 case SMB_COM_CLOSE:
337 case SMB_COM_FIND_CLOSE2:
338 case SMB_COM_LOCKING_ANDX: {
339 unload_nls(nls_codepage);
340 return -EAGAIN;
341 }
342 }
343 } else {
344 up(&tcon->ses->sesSem);
345 }
346 unload_nls(nls_codepage);
347
348 } else {
349 return -EIO;
350 }
351 }
352 if (rc)
353 return rc;
354
355 *request_buf = cifs_buf_get();
356 if (*request_buf == NULL) {
357 /* BB should we add a retry in here if not a writepage? */
358 return -ENOMEM;
359 }
360 /* Although the original thought was we needed the response buf for */
361 /* potential retries of smb operations it turns out we can determine */
362 /* from the mid flags when the request buffer can be resent without */
363 /* having to use a second distinct buffer for the response */
364 if (response_buf)
365 *response_buf = *request_buf;
366
367 header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
368 wct);
369
370 if (tcon != NULL)
371 cifs_stats_inc(&tcon->num_smbs_sent);
372
373 return rc;
374 }
375
376 static int validate_t2(struct smb_t2_rsp *pSMB)
377 {
378 int rc = -EINVAL;
379 int total_size;
380 char *pBCC;
381
382 /* check for plausible wct, bcc and t2 data and parm sizes */
383 /* check for parm and data offset going beyond end of smb */
384 if (pSMB->hdr.WordCount >= 10) {
385 if ((le16_to_cpu(pSMB->t2_rsp.ParameterOffset) <= 1024) &&
386 (le16_to_cpu(pSMB->t2_rsp.DataOffset) <= 1024)) {
387 /* check that bcc is at least as big as parms + data */
388 /* check that bcc is less than negotiated smb buffer */
389 total_size = le16_to_cpu(pSMB->t2_rsp.ParameterCount);
390 if (total_size < 512) {
391 total_size +=
392 le16_to_cpu(pSMB->t2_rsp.DataCount);
393 /* BCC le converted in SendReceive */
394 pBCC = (pSMB->hdr.WordCount * 2) +
395 sizeof(struct smb_hdr) +
396 (char *)pSMB;
397 if ((total_size <= (*(u16 *)pBCC)) &&
398 (total_size <
399 CIFSMaxBufSize+MAX_CIFS_HDR_SIZE)) {
400 return 0;
401 }
402 }
403 }
404 }
405 cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB,
406 sizeof(struct smb_t2_rsp) + 16);
407 return rc;
408 }
409 int
410 CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
411 {
412 NEGOTIATE_REQ *pSMB;
413 NEGOTIATE_RSP *pSMBr;
414 int rc = 0;
415 int bytes_returned;
416 int i;
417 struct TCP_Server_Info *server;
418 u16 count;
419 unsigned int secFlags;
420 u16 dialect;
421
422 if (ses->server)
423 server = ses->server;
424 else {
425 rc = -EIO;
426 return rc;
427 }
428 rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ ,
429 (void **) &pSMB, (void **) &pSMBr);
430 if (rc)
431 return rc;
432
433 /* if any of auth flags (ie not sign or seal) are overriden use them */
434 if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
435 secFlags = ses->overrideSecFlg; /* BB FIXME fix sign flags? */
436 else /* if override flags set only sign/seal OR them with global auth */
437 secFlags = extended_security | ses->overrideSecFlg;
438
439 cFYI(1, ("secFlags 0x%x", secFlags));
440
441 pSMB->hdr.Mid = GetNextMid(server);
442 pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
443
444 if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
445 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
446 else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
447 cFYI(1, ("Kerberos only mechanism, enable extended security"));
448 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
449 }
450
451 count = 0;
452 for (i = 0; i < CIFS_NUM_PROT; i++) {
453 strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
454 count += strlen(protocols[i].name) + 1;
455 /* null at end of source and target buffers anyway */
456 }
457 pSMB->hdr.smb_buf_length += count;
458 pSMB->ByteCount = cpu_to_le16(count);
459
460 rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
461 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
462 if (rc != 0)
463 goto neg_err_exit;
464
465 dialect = le16_to_cpu(pSMBr->DialectIndex);
466 cFYI(1, ("Dialect: %d", dialect));
467 /* Check wct = 1 error case */
468 if ((pSMBr->hdr.WordCount < 13) || (dialect == BAD_PROT)) {
469 /* core returns wct = 1, but we do not ask for core - otherwise
470 small wct just comes when dialect index is -1 indicating we
471 could not negotiate a common dialect */
472 rc = -EOPNOTSUPP;
473 goto neg_err_exit;
474 #ifdef CONFIG_CIFS_WEAK_PW_HASH
475 } else if ((pSMBr->hdr.WordCount == 13)
476 && ((dialect == LANMAN_PROT)
477 || (dialect == LANMAN2_PROT))) {
478 __s16 tmp;
479 struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;
480
481 if ((secFlags & CIFSSEC_MAY_LANMAN) ||
482 (secFlags & CIFSSEC_MAY_PLNTXT))
483 server->secType = LANMAN;
484 else {
485 cERROR(1, ("mount failed weak security disabled"
486 " in /proc/fs/cifs/SecurityFlags"));
487 rc = -EOPNOTSUPP;
488 goto neg_err_exit;
489 }
490 server->secMode = (__u8)le16_to_cpu(rsp->SecurityMode);
491 server->maxReq = le16_to_cpu(rsp->MaxMpxCount);
492 server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize),
493 (__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
494 GETU32(server->sessid) = le32_to_cpu(rsp->SessionKey);
495 /* even though we do not use raw we might as well set this
496 accurately, in case we ever find a need for it */
497 if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) {
498 server->maxRw = 0xFF00;
499 server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE;
500 } else {
501 server->maxRw = 0;/* we do not need to use raw anyway */
502 server->capabilities = CAP_MPX_MODE;
503 }
504 tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
505 if (tmp == -1) {
506 /* OS/2 often does not set timezone therefore
507 * we must use server time to calc time zone.
508 * Could deviate slightly from the right zone.
509 * Smallest defined timezone difference is 15 minutes
510 * (i.e. Nepal). Rounding up/down is done to match
511 * this requirement.
512 */
513 int val, seconds, remain, result;
514 struct timespec ts, utc;
515 utc = CURRENT_TIME;
516 ts = cnvrtDosUnixTm(le16_to_cpu(rsp->SrvTime.Date),
517 le16_to_cpu(rsp->SrvTime.Time));
518 cFYI(1, ("SrvTime %d sec since 1970 (utc: %d) diff: %d",
519 (int)ts.tv_sec, (int)utc.tv_sec,
520 (int)(utc.tv_sec - ts.tv_sec)));
521 val = (int)(utc.tv_sec - ts.tv_sec);
522 seconds = abs(val);
523 result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ;
524 remain = seconds % MIN_TZ_ADJ;
525 if (remain >= (MIN_TZ_ADJ / 2))
526 result += MIN_TZ_ADJ;
527 if (val < 0)
528 result = -result;
529 server->timeAdj = result;
530 } else {
531 server->timeAdj = (int)tmp;
532 server->timeAdj *= 60; /* also in seconds */
533 }
534 cFYI(1, ("server->timeAdj: %d seconds", server->timeAdj));
535
536
537 /* BB get server time for time conversions and add
538 code to use it and timezone since this is not UTC */
539
540 if (rsp->EncryptionKeyLength ==
541 cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
542 memcpy(server->cryptKey, rsp->EncryptionKey,
543 CIFS_CRYPTO_KEY_SIZE);
544 } else if (server->secMode & SECMODE_PW_ENCRYPT) {
545 rc = -EIO; /* need cryptkey unless plain text */
546 goto neg_err_exit;
547 }
548
549 cFYI(1, ("LANMAN negotiated"));
550 /* we will not end up setting signing flags - as no signing
551 was in LANMAN and server did not return the flags on */
552 goto signing_check;
553 #else /* weak security disabled */
554 } else if (pSMBr->hdr.WordCount == 13) {
555 cERROR(1, ("mount failed, cifs module not built "
556 "with CIFS_WEAK_PW_HASH support"));
557 rc = -EOPNOTSUPP;
558 #endif /* WEAK_PW_HASH */
559 goto neg_err_exit;
560 } else if (pSMBr->hdr.WordCount != 17) {
561 /* unknown wct */
562 rc = -EOPNOTSUPP;
563 goto neg_err_exit;
564 }
565 /* else wct == 17 NTLM */
566 server->secMode = pSMBr->SecurityMode;
567 if ((server->secMode & SECMODE_USER) == 0)
568 cFYI(1, ("share mode security"));
569
570 if ((server->secMode & SECMODE_PW_ENCRYPT) == 0)
571 #ifdef CONFIG_CIFS_WEAK_PW_HASH
572 if ((secFlags & CIFSSEC_MAY_PLNTXT) == 0)
573 #endif /* CIFS_WEAK_PW_HASH */
574 cERROR(1, ("Server requests plain text password"
575 " but client support disabled"));
576
577 if ((secFlags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
578 server->secType = NTLMv2;
579 else if (secFlags & CIFSSEC_MAY_NTLM)
580 server->secType = NTLM;
581 else if (secFlags & CIFSSEC_MAY_NTLMV2)
582 server->secType = NTLMv2;
583 else if (secFlags & CIFSSEC_MAY_KRB5)
584 server->secType = Kerberos;
585 else if (secFlags & CIFSSEC_MAY_LANMAN)
586 server->secType = LANMAN;
587 /* #ifdef CONFIG_CIFS_EXPERIMENTAL
588 else if (secFlags & CIFSSEC_MAY_PLNTXT)
589 server->secType = ??
590 #endif */
591 else {
592 rc = -EOPNOTSUPP;
593 cERROR(1, ("Invalid security type"));
594 goto neg_err_exit;
595 }
596 /* else ... any others ...? */
597
598 /* one byte, so no need to convert this or EncryptionKeyLen from
599 little endian */
600 server->maxReq = le16_to_cpu(pSMBr->MaxMpxCount);
601 /* probably no need to store and check maxvcs */
602 server->maxBuf = min(le32_to_cpu(pSMBr->MaxBufferSize),
603 (__u32) CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
604 server->maxRw = le32_to_cpu(pSMBr->MaxRawSize);
605 cFYI(DBG2, ("Max buf = %d", ses->server->maxBuf));
606 GETU32(ses->server->sessid) = le32_to_cpu(pSMBr->SessionKey);
607 server->capabilities = le32_to_cpu(pSMBr->Capabilities);
608 server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
609 server->timeAdj *= 60;
610 if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
611 memcpy(server->cryptKey, pSMBr->u.EncryptionKey,
612 CIFS_CRYPTO_KEY_SIZE);
613 } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC)
614 && (pSMBr->EncryptionKeyLength == 0)) {
615 /* decode security blob */
616 } else if (server->secMode & SECMODE_PW_ENCRYPT) {
617 rc = -EIO; /* no crypt key only if plain text pwd */
618 goto neg_err_exit;
619 }
620
621 /* BB might be helpful to save off the domain of server here */
622
623 if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC) &&
624 (server->capabilities & CAP_EXTENDED_SECURITY)) {
625 count = pSMBr->ByteCount;
626 if (count < 16) {
627 rc = -EIO;
628 goto neg_err_exit;
629 }
630
631 if (server->socketUseCount.counter > 1) {
632 if (memcmp(server->server_GUID,
633 pSMBr->u.extended_response.
634 GUID, 16) != 0) {
635 cFYI(1, ("server UID changed"));
636 memcpy(server->server_GUID,
637 pSMBr->u.extended_response.GUID,
638 16);
639 }
640 } else
641 memcpy(server->server_GUID,
642 pSMBr->u.extended_response.GUID, 16);
643
644 if (count == 16) {
645 server->secType = RawNTLMSSP;
646 } else {
647 rc = decode_negTokenInit(pSMBr->u.extended_response.
648 SecurityBlob,
649 count - 16,
650 &server->secType);
651 if (rc == 1) {
652 rc = 0;
653 } else {
654 rc = -EINVAL;
655 }
656 }
657 } else
658 server->capabilities &= ~CAP_EXTENDED_SECURITY;
659
660 #ifdef CONFIG_CIFS_WEAK_PW_HASH
661 signing_check:
662 #endif
663 if ((secFlags & CIFSSEC_MAY_SIGN) == 0) {
664 /* MUST_SIGN already includes the MAY_SIGN FLAG
665 so if this is zero it means that signing is disabled */
666 cFYI(1, ("Signing disabled"));
667 if (server->secMode & SECMODE_SIGN_REQUIRED) {
668 cERROR(1, ("Server requires "
669 "packet signing to be enabled in "
670 "/proc/fs/cifs/SecurityFlags."));
671 rc = -EOPNOTSUPP;
672 }
673 server->secMode &=
674 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
675 } else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
676 /* signing required */
677 cFYI(1, ("Must sign - secFlags 0x%x", secFlags));
678 if ((server->secMode &
679 (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
680 cERROR(1,
681 ("signing required but server lacks support"));
682 rc = -EOPNOTSUPP;
683 } else
684 server->secMode |= SECMODE_SIGN_REQUIRED;
685 } else {
686 /* signing optional ie CIFSSEC_MAY_SIGN */
687 if ((server->secMode & SECMODE_SIGN_REQUIRED) == 0)
688 server->secMode &=
689 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
690 }
691
692 neg_err_exit:
693 cifs_buf_release(pSMB);
694
695 cFYI(1, ("negprot rc %d", rc));
696 return rc;
697 }
698
699 int
700 CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon)
701 {
702 struct smb_hdr *smb_buffer;
703 int rc = 0;
704
705 cFYI(1, ("In tree disconnect"));
706 /*
707 * If last user of the connection and
708 * connection alive - disconnect it
709 * If this is the last connection on the server session disconnect it
710 * (and inside session disconnect we should check if tcp socket needs
711 * to be freed and kernel thread woken up).
712 */
713 if (tcon)
714 down(&tcon->tconSem);
715 else
716 return -EIO;
717
718 atomic_dec(&tcon->useCount);
719 if (atomic_read(&tcon->useCount) > 0) {
720 up(&tcon->tconSem);
721 return -EBUSY;
722 }
723
724 /* No need to return error on this operation if tid invalidated and
725 closed on server already e.g. due to tcp session crashing */
726 if (tcon->tidStatus == CifsNeedReconnect) {
727 up(&tcon->tconSem);
728 return 0;
729 }
730
731 if ((tcon->ses == NULL) || (tcon->ses->server == NULL)) {
732 up(&tcon->tconSem);
733 return -EIO;
734 }
735 rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon,
736 (void **)&smb_buffer);
737 if (rc) {
738 up(&tcon->tconSem);
739 return rc;
740 }
741
742 rc = SendReceiveNoRsp(xid, tcon->ses, smb_buffer, 0);
743 if (rc)
744 cFYI(1, ("Tree disconnect failed %d", rc));
745
746 up(&tcon->tconSem);
747
748 /* No need to return error on this operation if tid invalidated and
749 closed on server already e.g. due to tcp session crashing */
750 if (rc == -EAGAIN)
751 rc = 0;
752
753 return rc;
754 }
755
756 int
757 CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
758 {
759 LOGOFF_ANDX_REQ *pSMB;
760 int rc = 0;
761
762 cFYI(1, ("In SMBLogoff for session disconnect"));
763 if (ses)
764 down(&ses->sesSem);
765 else
766 return -EIO;
767
768 atomic_dec(&ses->inUse);
769 if (atomic_read(&ses->inUse) > 0) {
770 up(&ses->sesSem);
771 return -EBUSY;
772 }
773 rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
774 if (rc) {
775 up(&ses->sesSem);
776 return rc;
777 }
778
779 if (ses->server) {
780 pSMB->hdr.Mid = GetNextMid(ses->server);
781
782 if (ses->server->secMode &
783 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
784 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
785 }
786
787 pSMB->hdr.Uid = ses->Suid;
788
789 pSMB->AndXCommand = 0xFF;
790 rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0);
791 if (ses->server) {
792 atomic_dec(&ses->server->socketUseCount);
793 if (atomic_read(&ses->server->socketUseCount) == 0) {
794 spin_lock(&GlobalMid_Lock);
795 ses->server->tcpStatus = CifsExiting;
796 spin_unlock(&GlobalMid_Lock);
797 rc = -ESHUTDOWN;
798 }
799 }
800 up(&ses->sesSem);
801
802 /* if session dead then we do not need to do ulogoff,
803 since server closed smb session, no sense reporting
804 error */
805 if (rc == -EAGAIN)
806 rc = 0;
807 return rc;
808 }
809
810 int
811 CIFSPOSIXDelFile(const int xid, struct cifsTconInfo *tcon, const char *fileName,
812 __u16 type, const struct nls_table *nls_codepage, int remap)
813 {
814 TRANSACTION2_SPI_REQ *pSMB = NULL;
815 TRANSACTION2_SPI_RSP *pSMBr = NULL;
816 struct unlink_psx_rq *pRqD;
817 int name_len;
818 int rc = 0;
819 int bytes_returned = 0;
820 __u16 params, param_offset, offset, byte_count;
821
822 cFYI(1, ("In POSIX delete"));
823 PsxDelete:
824 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
825 (void **) &pSMBr);
826 if (rc)
827 return rc;
828
829 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
830 name_len =
831 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
832 PATH_MAX, nls_codepage, remap);
833 name_len++; /* trailing null */
834 name_len *= 2;
835 } else { /* BB add path length overrun check */
836 name_len = strnlen(fileName, PATH_MAX);
837 name_len++; /* trailing null */
838 strncpy(pSMB->FileName, fileName, name_len);
839 }
840
841 params = 6 + name_len;
842 pSMB->MaxParameterCount = cpu_to_le16(2);
843 pSMB->MaxDataCount = 0; /* BB double check this with jra */
844 pSMB->MaxSetupCount = 0;
845 pSMB->Reserved = 0;
846 pSMB->Flags = 0;
847 pSMB->Timeout = 0;
848 pSMB->Reserved2 = 0;
849 param_offset = offsetof(struct smb_com_transaction2_spi_req,
850 InformationLevel) - 4;
851 offset = param_offset + params;
852
853 /* Setup pointer to Request Data (inode type) */
854 pRqD = (struct unlink_psx_rq *)(((char *)&pSMB->hdr.Protocol) + offset);
855 pRqD->type = cpu_to_le16(type);
856 pSMB->ParameterOffset = cpu_to_le16(param_offset);
857 pSMB->DataOffset = cpu_to_le16(offset);
858 pSMB->SetupCount = 1;
859 pSMB->Reserved3 = 0;
860 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
861 byte_count = 3 /* pad */ + params + sizeof(struct unlink_psx_rq);
862
863 pSMB->DataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
864 pSMB->TotalDataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
865 pSMB->ParameterCount = cpu_to_le16(params);
866 pSMB->TotalParameterCount = pSMB->ParameterCount;
867 pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_UNLINK);
868 pSMB->Reserved4 = 0;
869 pSMB->hdr.smb_buf_length += byte_count;
870 pSMB->ByteCount = cpu_to_le16(byte_count);
871 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
872 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
873 if (rc)
874 cFYI(1, ("Posix delete returned %d", rc));
875 cifs_buf_release(pSMB);
876
877 cifs_stats_inc(&tcon->num_deletes);
878
879 if (rc == -EAGAIN)
880 goto PsxDelete;
881
882 return rc;
883 }
884
885 int
886 CIFSSMBDelFile(const int xid, struct cifsTconInfo *tcon, const char *fileName,
887 const struct nls_table *nls_codepage, int remap)
888 {
889 DELETE_FILE_REQ *pSMB = NULL;
890 DELETE_FILE_RSP *pSMBr = NULL;
891 int rc = 0;
892 int bytes_returned;
893 int name_len;
894
895 DelFileRetry:
896 rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB,
897 (void **) &pSMBr);
898 if (rc)
899 return rc;
900
901 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
902 name_len =
903 cifsConvertToUCS((__le16 *) pSMB->fileName, fileName,
904 PATH_MAX, nls_codepage, remap);
905 name_len++; /* trailing null */
906 name_len *= 2;
907 } else { /* BB improve check for buffer overruns BB */
908 name_len = strnlen(fileName, PATH_MAX);
909 name_len++; /* trailing null */
910 strncpy(pSMB->fileName, fileName, name_len);
911 }
912 pSMB->SearchAttributes =
913 cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM);
914 pSMB->BufferFormat = 0x04;
915 pSMB->hdr.smb_buf_length += name_len + 1;
916 pSMB->ByteCount = cpu_to_le16(name_len + 1);
917 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
918 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
919 cifs_stats_inc(&tcon->num_deletes);
920 if (rc)
921 cFYI(1, ("Error in RMFile = %d", rc));
922
923 cifs_buf_release(pSMB);
924 if (rc == -EAGAIN)
925 goto DelFileRetry;
926
927 return rc;
928 }
929
930 int
931 CIFSSMBRmDir(const int xid, struct cifsTconInfo *tcon, const char *dirName,
932 const struct nls_table *nls_codepage, int remap)
933 {
934 DELETE_DIRECTORY_REQ *pSMB = NULL;
935 DELETE_DIRECTORY_RSP *pSMBr = NULL;
936 int rc = 0;
937 int bytes_returned;
938 int name_len;
939
940 cFYI(1, ("In CIFSSMBRmDir"));
941 RmDirRetry:
942 rc = smb_init(SMB_COM_DELETE_DIRECTORY, 0, tcon, (void **) &pSMB,
943 (void **) &pSMBr);
944 if (rc)
945 return rc;
946
947 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
948 name_len = cifsConvertToUCS((__le16 *) pSMB->DirName, dirName,
949 PATH_MAX, nls_codepage, remap);
950 name_len++; /* trailing null */
951 name_len *= 2;
952 } else { /* BB improve check for buffer overruns BB */
953 name_len = strnlen(dirName, PATH_MAX);
954 name_len++; /* trailing null */
955 strncpy(pSMB->DirName, dirName, name_len);
956 }
957
958 pSMB->BufferFormat = 0x04;
959 pSMB->hdr.smb_buf_length += name_len + 1;
960 pSMB->ByteCount = cpu_to_le16(name_len + 1);
961 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
962 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
963 cifs_stats_inc(&tcon->num_rmdirs);
964 if (rc)
965 cFYI(1, ("Error in RMDir = %d", rc));
966
967 cifs_buf_release(pSMB);
968 if (rc == -EAGAIN)
969 goto RmDirRetry;
970 return rc;
971 }
972
973 int
974 CIFSSMBMkDir(const int xid, struct cifsTconInfo *tcon,
975 const char *name, const struct nls_table *nls_codepage, int remap)
976 {
977 int rc = 0;
978 CREATE_DIRECTORY_REQ *pSMB = NULL;
979 CREATE_DIRECTORY_RSP *pSMBr = NULL;
980 int bytes_returned;
981 int name_len;
982
983 cFYI(1, ("In CIFSSMBMkDir"));
984 MkDirRetry:
985 rc = smb_init(SMB_COM_CREATE_DIRECTORY, 0, tcon, (void **) &pSMB,
986 (void **) &pSMBr);
987 if (rc)
988 return rc;
989
990 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
991 name_len = cifsConvertToUCS((__le16 *) pSMB->DirName, name,
992 PATH_MAX, nls_codepage, remap);
993 name_len++; /* trailing null */
994 name_len *= 2;
995 } else { /* BB improve check for buffer overruns BB */
996 name_len = strnlen(name, PATH_MAX);
997 name_len++; /* trailing null */
998 strncpy(pSMB->DirName, name, name_len);
999 }
1000
1001 pSMB->BufferFormat = 0x04;
1002 pSMB->hdr.smb_buf_length += name_len + 1;
1003 pSMB->ByteCount = cpu_to_le16(name_len + 1);
1004 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1005 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1006 cifs_stats_inc(&tcon->num_mkdirs);
1007 if (rc)
1008 cFYI(1, ("Error in Mkdir = %d", rc));
1009
1010 cifs_buf_release(pSMB);
1011 if (rc == -EAGAIN)
1012 goto MkDirRetry;
1013 return rc;
1014 }
1015
1016 int
1017 CIFSPOSIXCreate(const int xid, struct cifsTconInfo *tcon, __u32 posix_flags,
1018 __u64 mode, __u16 *netfid, FILE_UNIX_BASIC_INFO *pRetData,
1019 __u32 *pOplock, const char *name,
1020 const struct nls_table *nls_codepage, int remap)
1021 {
1022 TRANSACTION2_SPI_REQ *pSMB = NULL;
1023 TRANSACTION2_SPI_RSP *pSMBr = NULL;
1024 int name_len;
1025 int rc = 0;
1026 int bytes_returned = 0;
1027 __u16 params, param_offset, offset, byte_count, count;
1028 OPEN_PSX_REQ *pdata;
1029 OPEN_PSX_RSP *psx_rsp;
1030
1031 cFYI(1, ("In POSIX Create"));
1032 PsxCreat:
1033 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
1034 (void **) &pSMBr);
1035 if (rc)
1036 return rc;
1037
1038 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1039 name_len =
1040 cifsConvertToUCS((__le16 *) pSMB->FileName, name,
1041 PATH_MAX, nls_codepage, remap);
1042 name_len++; /* trailing null */
1043 name_len *= 2;
1044 } else { /* BB improve the check for buffer overruns BB */
1045 name_len = strnlen(name, PATH_MAX);
1046 name_len++; /* trailing null */
1047 strncpy(pSMB->FileName, name, name_len);
1048 }
1049
1050 params = 6 + name_len;
1051 count = sizeof(OPEN_PSX_REQ);
1052 pSMB->MaxParameterCount = cpu_to_le16(2);
1053 pSMB->MaxDataCount = cpu_to_le16(1000); /* large enough */
1054 pSMB->MaxSetupCount = 0;
1055 pSMB->Reserved = 0;
1056 pSMB->Flags = 0;
1057 pSMB->Timeout = 0;
1058 pSMB->Reserved2 = 0;
1059 param_offset = offsetof(struct smb_com_transaction2_spi_req,
1060 InformationLevel) - 4;
1061 offset = param_offset + params;
1062 pdata = (OPEN_PSX_REQ *)(((char *)&pSMB->hdr.Protocol) + offset);
1063 pdata->Level = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
1064 pdata->Permissions = cpu_to_le64(mode);
1065 pdata->PosixOpenFlags = cpu_to_le32(posix_flags);
1066 pdata->OpenFlags = cpu_to_le32(*pOplock);
1067 pSMB->ParameterOffset = cpu_to_le16(param_offset);
1068 pSMB->DataOffset = cpu_to_le16(offset);
1069 pSMB->SetupCount = 1;
1070 pSMB->Reserved3 = 0;
1071 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
1072 byte_count = 3 /* pad */ + params + count;
1073
1074 pSMB->DataCount = cpu_to_le16(count);
1075 pSMB->ParameterCount = cpu_to_le16(params);
1076 pSMB->TotalDataCount = pSMB->DataCount;
1077 pSMB->TotalParameterCount = pSMB->ParameterCount;
1078 pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_OPEN);
1079 pSMB->Reserved4 = 0;
1080 pSMB->hdr.smb_buf_length += byte_count;
1081 pSMB->ByteCount = cpu_to_le16(byte_count);
1082 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1083 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1084 if (rc) {
1085 cFYI(1, ("Posix create returned %d", rc));
1086 goto psx_create_err;
1087 }
1088
1089 cFYI(1, ("copying inode info"));
1090 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
1091
1092 if (rc || (pSMBr->ByteCount < sizeof(OPEN_PSX_RSP))) {
1093 rc = -EIO; /* bad smb */
1094 goto psx_create_err;
1095 }
1096
1097 /* copy return information to pRetData */
1098 psx_rsp = (OPEN_PSX_RSP *)((char *) &pSMBr->hdr.Protocol
1099 + le16_to_cpu(pSMBr->t2.DataOffset));
1100
1101 *pOplock = le16_to_cpu(psx_rsp->OplockFlags);
1102 if (netfid)
1103 *netfid = psx_rsp->Fid; /* cifs fid stays in le */
1104 /* Let caller know file was created so we can set the mode. */
1105 /* Do we care about the CreateAction in any other cases? */
1106 if (cpu_to_le32(FILE_CREATE) == psx_rsp->CreateAction)
1107 *pOplock |= CIFS_CREATE_ACTION;
1108 /* check to make sure response data is there */
1109 if (psx_rsp->ReturnedLevel != cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC)) {
1110 pRetData->Type = cpu_to_le32(-1); /* unknown */
1111 cFYI(DBG2, ("unknown type"));
1112 } else {
1113 if (pSMBr->ByteCount < sizeof(OPEN_PSX_RSP)
1114 + sizeof(FILE_UNIX_BASIC_INFO)) {
1115 cERROR(1, ("Open response data too small"));
1116 pRetData->Type = cpu_to_le32(-1);
1117 goto psx_create_err;
1118 }
1119 memcpy((char *) pRetData,
1120 (char *)psx_rsp + sizeof(OPEN_PSX_RSP),
1121 sizeof(FILE_UNIX_BASIC_INFO));
1122 }
1123
1124 psx_create_err:
1125 cifs_buf_release(pSMB);
1126
1127 cifs_stats_inc(&tcon->num_mkdirs);
1128
1129 if (rc == -EAGAIN)
1130 goto PsxCreat;
1131
1132 return rc;
1133 }
1134
1135 static __u16 convert_disposition(int disposition)
1136 {
1137 __u16 ofun = 0;
1138
1139 switch (disposition) {
1140 case FILE_SUPERSEDE:
1141 ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
1142 break;
1143 case FILE_OPEN:
1144 ofun = SMBOPEN_OAPPEND;
1145 break;
1146 case FILE_CREATE:
1147 ofun = SMBOPEN_OCREATE;
1148 break;
1149 case FILE_OPEN_IF:
1150 ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND;
1151 break;
1152 case FILE_OVERWRITE:
1153 ofun = SMBOPEN_OTRUNC;
1154 break;
1155 case FILE_OVERWRITE_IF:
1156 ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
1157 break;
1158 default:
1159 cFYI(1, ("unknown disposition %d", disposition));
1160 ofun = SMBOPEN_OAPPEND; /* regular open */
1161 }
1162 return ofun;
1163 }
1164
1165 int
1166 SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
1167 const char *fileName, const int openDisposition,
1168 const int access_flags, const int create_options, __u16 *netfid,
1169 int *pOplock, FILE_ALL_INFO *pfile_info,
1170 const struct nls_table *nls_codepage, int remap)
1171 {
1172 int rc = -EACCES;
1173 OPENX_REQ *pSMB = NULL;
1174 OPENX_RSP *pSMBr = NULL;
1175 int bytes_returned;
1176 int name_len;
1177 __u16 count;
1178
1179 OldOpenRetry:
1180 rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB,
1181 (void **) &pSMBr);
1182 if (rc)
1183 return rc;
1184
1185 pSMB->AndXCommand = 0xFF; /* none */
1186
1187 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1188 count = 1; /* account for one byte pad to word boundary */
1189 name_len =
1190 cifsConvertToUCS((__le16 *) (pSMB->fileName + 1),
1191 fileName, PATH_MAX, nls_codepage, remap);
1192 name_len++; /* trailing null */
1193 name_len *= 2;
1194 } else { /* BB improve check for buffer overruns BB */
1195 count = 0; /* no pad */
1196 name_len = strnlen(fileName, PATH_MAX);
1197 name_len++; /* trailing null */
1198 strncpy(pSMB->fileName, fileName, name_len);
1199 }
1200 if (*pOplock & REQ_OPLOCK)
1201 pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
1202 else if (*pOplock & REQ_BATCHOPLOCK)
1203 pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK);
1204
1205 pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO);
1206 /* BB fixme add conversion for access_flags to bits 0 - 2 of mode */
1207 /* 0 = read
1208 1 = write
1209 2 = rw
1210 3 = execute
1211 */
1212 pSMB->Mode = cpu_to_le16(2);
1213 pSMB->Mode |= cpu_to_le16(0x40); /* deny none */
1214 /* set file as system file if special file such
1215 as fifo and server expecting SFU style and
1216 no Unix extensions */
1217
1218 if (create_options & CREATE_OPTION_SPECIAL)
1219 pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
1220 else /* BB FIXME BB */
1221 pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/);
1222
1223 /* if ((omode & S_IWUGO) == 0)
1224 pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY);*/
1225 /* Above line causes problems due to vfs splitting create into two
1226 pieces - need to set mode after file created not while it is
1227 being created */
1228
1229 /* BB FIXME BB */
1230 /* pSMB->CreateOptions = cpu_to_le32(create_options &
1231 CREATE_OPTIONS_MASK); */
1232 /* BB FIXME END BB */
1233
1234 pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
1235 pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
1236 count += name_len;
1237 pSMB->hdr.smb_buf_length += count;
1238
1239 pSMB->ByteCount = cpu_to_le16(count);
1240 /* long_op set to 1 to allow for oplock break timeouts */
1241 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1242 (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
1243 cifs_stats_inc(&tcon->num_opens);
1244 if (rc) {
1245 cFYI(1, ("Error in Open = %d", rc));
1246 } else {
1247 /* BB verify if wct == 15 */
1248
1249 /* *pOplock = pSMBr->OplockLevel; */ /* BB take from action field BB */
1250
1251 *netfid = pSMBr->Fid; /* cifs fid stays in le */
1252 /* Let caller know file was created so we can set the mode. */
1253 /* Do we care about the CreateAction in any other cases? */
1254 /* BB FIXME BB */
1255 /* if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
1256 *pOplock |= CIFS_CREATE_ACTION; */
1257 /* BB FIXME END */
1258
1259 if (pfile_info) {
1260 pfile_info->CreationTime = 0; /* BB convert CreateTime*/
1261 pfile_info->LastAccessTime = 0; /* BB fixme */
1262 pfile_info->LastWriteTime = 0; /* BB fixme */
1263 pfile_info->ChangeTime = 0; /* BB fixme */
1264 pfile_info->Attributes =
1265 cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes));
1266 /* the file_info buf is endian converted by caller */
1267 pfile_info->AllocationSize =
1268 cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
1269 pfile_info->EndOfFile = pfile_info->AllocationSize;
1270 pfile_info->NumberOfLinks = cpu_to_le32(1);
1271 }
1272 }
1273
1274 cifs_buf_release(pSMB);
1275 if (rc == -EAGAIN)
1276 goto OldOpenRetry;
1277 return rc;
1278 }
1279
1280 int
1281 CIFSSMBOpen(const int xid, struct cifsTconInfo *tcon,
1282 const char *fileName, const int openDisposition,
1283 const int access_flags, const int create_options, __u16 *netfid,
1284 int *pOplock, FILE_ALL_INFO *pfile_info,
1285 const struct nls_table *nls_codepage, int remap)
1286 {
1287 int rc = -EACCES;
1288 OPEN_REQ *pSMB = NULL;
1289 OPEN_RSP *pSMBr = NULL;
1290 int bytes_returned;
1291 int name_len;
1292 __u16 count;
1293
1294 openRetry:
1295 rc = smb_init(SMB_COM_NT_CREATE_ANDX, 24, tcon, (void **) &pSMB,
1296 (void **) &pSMBr);
1297 if (rc)
1298 return rc;
1299
1300 pSMB->AndXCommand = 0xFF; /* none */
1301
1302 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1303 count = 1; /* account for one byte pad to word boundary */
1304 name_len =
1305 cifsConvertToUCS((__le16 *) (pSMB->fileName + 1),
1306 fileName, PATH_MAX, nls_codepage, remap);
1307 name_len++; /* trailing null */
1308 name_len *= 2;
1309 pSMB->NameLength = cpu_to_le16(name_len);
1310 } else { /* BB improve check for buffer overruns BB */
1311 count = 0; /* no pad */
1312 name_len = strnlen(fileName, PATH_MAX);
1313 name_len++; /* trailing null */
1314 pSMB->NameLength = cpu_to_le16(name_len);
1315 strncpy(pSMB->fileName, fileName, name_len);
1316 }
1317 if (*pOplock & REQ_OPLOCK)
1318 pSMB->OpenFlags = cpu_to_le32(REQ_OPLOCK);
1319 else if (*pOplock & REQ_BATCHOPLOCK)
1320 pSMB->OpenFlags = cpu_to_le32(REQ_BATCHOPLOCK);
1321 pSMB->DesiredAccess = cpu_to_le32(access_flags);
1322 pSMB->AllocationSize = 0;
1323 /* set file as system file if special file such
1324 as fifo and server expecting SFU style and
1325 no Unix extensions */
1326 if (create_options & CREATE_OPTION_SPECIAL)
1327 pSMB->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
1328 else
1329 pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
1330 /* XP does not handle ATTR_POSIX_SEMANTICS */
1331 /* but it helps speed up case sensitive checks for other
1332 servers such as Samba */
1333 if (tcon->ses->capabilities & CAP_UNIX)
1334 pSMB->FileAttributes |= cpu_to_le32(ATTR_POSIX_SEMANTICS);
1335
1336 /* if ((omode & S_IWUGO) == 0)
1337 pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY);*/
1338 /* Above line causes problems due to vfs splitting create into two
1339 pieces - need to set mode after file created not while it is
1340 being created */
1341 pSMB->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
1342 pSMB->CreateDisposition = cpu_to_le32(openDisposition);
1343 pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
1344 /* BB Expirement with various impersonation levels and verify */
1345 pSMB->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
1346 pSMB->SecurityFlags =
1347 SECURITY_CONTEXT_TRACKING | SECURITY_EFFECTIVE_ONLY;
1348
1349 count += name_len;
1350 pSMB->hdr.smb_buf_length += count;
1351
1352 pSMB->ByteCount = cpu_to_le16(count);
1353 /* long_op set to 1 to allow for oplock break timeouts */
1354 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1355 (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
1356 cifs_stats_inc(&tcon->num_opens);
1357 if (rc) {
1358 cFYI(1, ("Error in Open = %d", rc));
1359 } else {
1360 *pOplock = pSMBr->OplockLevel; /* 1 byte no need to le_to_cpu */
1361 *netfid = pSMBr->Fid; /* cifs fid stays in le */
1362 /* Let caller know file was created so we can set the mode. */
1363 /* Do we care about the CreateAction in any other cases? */
1364 if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
1365 *pOplock |= CIFS_CREATE_ACTION;
1366 if (pfile_info) {
1367 memcpy((char *)pfile_info, (char *)&pSMBr->CreationTime,
1368 36 /* CreationTime to Attributes */);
1369 /* the file_info buf is endian converted by caller */
1370 pfile_info->AllocationSize = pSMBr->AllocationSize;
1371 pfile_info->EndOfFile = pSMBr->EndOfFile;
1372 pfile_info->NumberOfLinks = cpu_to_le32(1);
1373 }
1374 }
1375
1376 cifs_buf_release(pSMB);
1377 if (rc == -EAGAIN)
1378 goto openRetry;
1379 return rc;
1380 }
1381
1382 int
1383 CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid,
1384 const unsigned int count, const __u64 lseek, unsigned int *nbytes,
1385 char **buf, int *pbuf_type)
1386 {
1387 int rc = -EACCES;
1388 READ_REQ *pSMB = NULL;
1389 READ_RSP *pSMBr = NULL;
1390 char *pReadData = NULL;
1391 int wct;
1392 int resp_buf_type = 0;
1393 struct kvec iov[1];
1394
1395 cFYI(1, ("Reading %d bytes on fid %d", count, netfid));
1396 if (tcon->ses->capabilities & CAP_LARGE_FILES)
1397 wct = 12;
1398 else
1399 wct = 10; /* old style read */
1400
1401 *nbytes = 0;
1402 rc = small_smb_init(SMB_COM_READ_ANDX, wct, tcon, (void **) &pSMB);
1403 if (rc)
1404 return rc;
1405
1406 /* tcon and ses pointer are checked in smb_init */
1407 if (tcon->ses->server == NULL)
1408 return -ECONNABORTED;
1409
1410 pSMB->AndXCommand = 0xFF; /* none */
1411 pSMB->Fid = netfid;
1412 pSMB->OffsetLow = cpu_to_le32(lseek & 0xFFFFFFFF);
1413 if (wct == 12)
1414 pSMB->OffsetHigh = cpu_to_le32(lseek >> 32);
1415 else if ((lseek >> 32) > 0) /* can not handle this big offset for old */
1416 return -EIO;
1417
1418 pSMB->Remaining = 0;
1419 pSMB->MaxCount = cpu_to_le16(count & 0xFFFF);
1420 pSMB->MaxCountHigh = cpu_to_le32(count >> 16);
1421 if (wct == 12)
1422 pSMB->ByteCount = 0; /* no need to do le conversion since 0 */
1423 else {
1424 /* old style read */
1425 struct smb_com_readx_req *pSMBW =
1426 (struct smb_com_readx_req *)pSMB;
1427 pSMBW->ByteCount = 0;
1428 }
1429
1430 iov[0].iov_base = (char *)pSMB;
1431 iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
1432 rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
1433 &resp_buf_type, CIFS_STD_OP | CIFS_LOG_ERROR);
1434 cifs_stats_inc(&tcon->num_reads);
1435 pSMBr = (READ_RSP *)iov[0].iov_base;
1436 if (rc) {
1437 cERROR(1, ("Send error in read = %d", rc));
1438 } else {
1439 int data_length = le16_to_cpu(pSMBr->DataLengthHigh);
1440 data_length = data_length << 16;
1441 data_length += le16_to_cpu(pSMBr->DataLength);
1442 *nbytes = data_length;
1443
1444 /*check that DataLength would not go beyond end of SMB */
1445 if ((data_length > CIFSMaxBufSize)
1446 || (data_length > count)) {
1447 cFYI(1, ("bad length %d for count %d",
1448 data_length, count));
1449 rc = -EIO;
1450 *nbytes = 0;
1451 } else {
1452 pReadData = (char *) (&pSMBr->hdr.Protocol) +
1453 le16_to_cpu(pSMBr->DataOffset);
1454 /* if (rc = copy_to_user(buf, pReadData, data_length)) {
1455 cERROR(1,("Faulting on read rc = %d",rc));
1456 rc = -EFAULT;
1457 }*/ /* can not use copy_to_user when using page cache*/
1458 if (*buf)
1459 memcpy(*buf, pReadData, data_length);
1460 }
1461 }
1462
1463 /* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
1464 if (*buf) {
1465 if (resp_buf_type == CIFS_SMALL_BUFFER)
1466 cifs_small_buf_release(iov[0].iov_base);
1467 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1468 cifs_buf_release(iov[0].iov_base);
1469 } else if (resp_buf_type != CIFS_NO_BUFFER) {
1470 /* return buffer to caller to free */
1471 *buf = iov[0].iov_base;
1472 if (resp_buf_type == CIFS_SMALL_BUFFER)
1473 *pbuf_type = CIFS_SMALL_BUFFER;
1474 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1475 *pbuf_type = CIFS_LARGE_BUFFER;
1476 } /* else no valid buffer on return - leave as null */
1477
1478 /* Note: On -EAGAIN error only caller can retry on handle based calls
1479 since file handle passed in no longer valid */
1480 return rc;
1481 }
1482
1483
1484 int
1485 CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
1486 const int netfid, const unsigned int count,
1487 const __u64 offset, unsigned int *nbytes, const char *buf,
1488 const char __user *ubuf, const int long_op)
1489 {
1490 int rc = -EACCES;
1491 WRITE_REQ *pSMB = NULL;
1492 WRITE_RSP *pSMBr = NULL;
1493 int bytes_returned, wct;
1494 __u32 bytes_sent;
1495 __u16 byte_count;
1496
1497 /* cFYI(1,("write at %lld %d bytes",offset,count));*/
1498 if (tcon->ses == NULL)
1499 return -ECONNABORTED;
1500
1501 if (tcon->ses->capabilities & CAP_LARGE_FILES)
1502 wct = 14;
1503 else
1504 wct = 12;
1505
1506 rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
1507 (void **) &pSMBr);
1508 if (rc)
1509 return rc;
1510 /* tcon and ses pointer are checked in smb_init */
1511 if (tcon->ses->server == NULL)
1512 return -ECONNABORTED;
1513
1514 pSMB->AndXCommand = 0xFF; /* none */
1515 pSMB->Fid = netfid;
1516 pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
1517 if (wct == 14)
1518 pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
1519 else if ((offset >> 32) > 0) /* can not handle big offset for old srv */
1520 return -EIO;
1521
1522 pSMB->Reserved = 0xFFFFFFFF;
1523 pSMB->WriteMode = 0;
1524 pSMB->Remaining = 0;
1525
1526 /* Can increase buffer size if buffer is big enough in some cases ie we
1527 can send more if LARGE_WRITE_X capability returned by the server and if
1528 our buffer is big enough or if we convert to iovecs on socket writes
1529 and eliminate the copy to the CIFS buffer */
1530 if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) {
1531 bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count);
1532 } else {
1533 bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)
1534 & ~0xFF;
1535 }
1536
1537 if (bytes_sent > count)
1538 bytes_sent = count;
1539 pSMB->DataOffset =
1540 cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
1541 if (buf)
1542 memcpy(pSMB->Data, buf, bytes_sent);
1543 else if (ubuf) {
1544 if (copy_from_user(pSMB->Data, ubuf, bytes_sent)) {
1545 cifs_buf_release(pSMB);
1546 return -EFAULT;
1547 }
1548 } else if (count != 0) {
1549 /* No buffer */
1550 cifs_buf_release(pSMB);
1551 return -EINVAL;
1552 } /* else setting file size with write of zero bytes */
1553 if (wct == 14)
1554 byte_count = bytes_sent + 1; /* pad */
1555 else /* wct == 12 */
1556 byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */
1557
1558 pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
1559 pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
1560 pSMB->hdr.smb_buf_length += byte_count;
1561
1562 if (wct == 14)
1563 pSMB->ByteCount = cpu_to_le16(byte_count);
1564 else { /* old style write has byte count 4 bytes earlier
1565 so 4 bytes pad */
1566 struct smb_com_writex_req *pSMBW =
1567 (struct smb_com_writex_req *)pSMB;
1568 pSMBW->ByteCount = cpu_to_le16(byte_count);
1569 }
1570
1571 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1572 (struct smb_hdr *) pSMBr, &bytes_returned, long_op);
1573 cifs_stats_inc(&tcon->num_writes);
1574 if (rc) {
1575 cFYI(1, ("Send error in write = %d", rc));
1576 *nbytes = 0;
1577 } else {
1578 *nbytes = le16_to_cpu(pSMBr->CountHigh);
1579 *nbytes = (*nbytes) << 16;
1580 *nbytes += le16_to_cpu(pSMBr->Count);
1581 }
1582
1583 cifs_buf_release(pSMB);
1584
1585 /* Note: On -EAGAIN error only caller can retry on handle based calls
1586 since file handle passed in no longer valid */
1587
1588 return rc;
1589 }
1590
1591 int
1592 CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
1593 const int netfid, const unsigned int count,
1594 const __u64 offset, unsigned int *nbytes, struct kvec *iov,
1595 int n_vec, const int long_op)
1596 {
1597 int rc = -EACCES;
1598 WRITE_REQ *pSMB = NULL;
1599 int wct;
1600 int smb_hdr_len;
1601 int resp_buf_type = 0;
1602
1603 cFYI(1, ("write2 at %lld %d bytes", (long long)offset, count));
1604
1605 if (tcon->ses->capabilities & CAP_LARGE_FILES)
1606 wct = 14;
1607 else
1608 wct = 12;
1609 rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
1610 if (rc)
1611 return rc;
1612 /* tcon and ses pointer are checked in smb_init */
1613 if (tcon->ses->server == NULL)
1614 return -ECONNABORTED;
1615
1616 pSMB->AndXCommand = 0xFF; /* none */
1617 pSMB->Fid = netfid;
1618 pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
1619 if (wct == 14)
1620 pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
1621 else if ((offset >> 32) > 0) /* can not handle big offset for old srv */
1622 return -EIO;
1623 pSMB->Reserved = 0xFFFFFFFF;
1624 pSMB->WriteMode = 0;
1625 pSMB->Remaining = 0;
1626
1627 pSMB->DataOffset =
1628 cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
1629
1630 pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
1631 pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
1632 smb_hdr_len = pSMB->hdr.smb_buf_length + 1; /* hdr + 1 byte pad */
1633 if (wct == 14)
1634 pSMB->hdr.smb_buf_length += count+1;
1635 else /* wct == 12 */
1636 pSMB->hdr.smb_buf_length += count+5; /* smb data starts later */
1637 if (wct == 14)
1638 pSMB->ByteCount = cpu_to_le16(count + 1);
1639 else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
1640 struct smb_com_writex_req *pSMBW =
1641 (struct smb_com_writex_req *)pSMB;
1642 pSMBW->ByteCount = cpu_to_le16(count + 5);
1643 }
1644 iov[0].iov_base = pSMB;
1645 if (wct == 14)
1646 iov[0].iov_len = smb_hdr_len + 4;
1647 else /* wct == 12 pad bigger by four bytes */
1648 iov[0].iov_len = smb_hdr_len + 8;
1649
1650
1651 rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type,
1652 long_op);
1653 cifs_stats_inc(&tcon->num_writes);
1654 if (rc) {
1655 cFYI(1, ("Send error Write2 = %d", rc));
1656 *nbytes = 0;
1657 } else if (resp_buf_type == 0) {
1658 /* presumably this can not happen, but best to be safe */
1659 rc = -EIO;
1660 *nbytes = 0;
1661 } else {
1662 WRITE_RSP *pSMBr = (WRITE_RSP *)iov[0].iov_base;
1663 *nbytes = le16_to_cpu(pSMBr->CountHigh);
1664 *nbytes = (*nbytes) << 16;
1665 *nbytes += le16_to_cpu(pSMBr->Count);
1666 }
1667
1668 /* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
1669 if (resp_buf_type == CIFS_SMALL_BUFFER)
1670 cifs_small_buf_release(iov[0].iov_base);
1671 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1672 cifs_buf_release(iov[0].iov_base);
1673
1674 /* Note: On -EAGAIN error only caller can retry on handle based calls
1675 since file handle passed in no longer valid */
1676
1677 return rc;
1678 }
1679
1680
1681 int
1682 CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
1683 const __u16 smb_file_id, const __u64 len,
1684 const __u64 offset, const __u32 numUnlock,
1685 const __u32 numLock, const __u8 lockType, const int waitFlag)
1686 {
1687 int rc = 0;
1688 LOCK_REQ *pSMB = NULL;
1689 LOCK_RSP *pSMBr = NULL;
1690 int bytes_returned;
1691 int timeout = 0;
1692 __u16 count;
1693
1694 cFYI(1, ("CIFSSMBLock timeout %d numLock %d", waitFlag, numLock));
1695 rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
1696
1697 if (rc)
1698 return rc;
1699
1700 pSMBr = (LOCK_RSP *)pSMB; /* BB removeme BB */
1701
1702 if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
1703 timeout = CIFS_ASYNC_OP; /* no response expected */
1704 pSMB->Timeout = 0;
1705 } else if (waitFlag == TRUE) {
1706 timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
1707 pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */
1708 } else {
1709 pSMB->Timeout = 0;
1710 }
1711
1712 pSMB->NumberOfLocks = cpu_to_le16(numLock);
1713 pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
1714 pSMB->LockType = lockType;
1715 pSMB->AndXCommand = 0xFF; /* none */
1716 pSMB->Fid = smb_file_id; /* netfid stays le */
1717
1718 if ((numLock != 0) || (numUnlock != 0)) {
1719 pSMB->Locks[0].Pid = cpu_to_le16(current->tgid);
1720 /* BB where to store pid high? */
1721 pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len);
1722 pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32));
1723 pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset);
1724 pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32));
1725 count = sizeof(LOCKING_ANDX_RANGE);
1726 } else {
1727 /* oplock break */
1728 count = 0;
1729 }
1730 pSMB->hdr.smb_buf_length += count;
1731 pSMB->ByteCount = cpu_to_le16(count);
1732
1733 if (waitFlag) {
1734 rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
1735 (struct smb_hdr *) pSMBr, &bytes_returned);
1736 cifs_small_buf_release(pSMB);
1737 } else {
1738 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *)pSMB,
1739 timeout);
1740 /* SMB buffer freed by function above */
1741 }
1742 cifs_stats_inc(&tcon->num_locks);
1743 if (rc)
1744 cFYI(1, ("Send error in Lock = %d", rc));
1745
1746 /* Note: On -EAGAIN error only caller can retry on handle based calls
1747 since file handle passed in no longer valid */
1748 return rc;
1749 }
1750
1751 int
1752 CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1753 const __u16 smb_file_id, const int get_flag, const __u64 len,
1754 struct file_lock *pLockData, const __u16 lock_type,
1755 const int waitFlag)
1756 {
1757 struct smb_com_transaction2_sfi_req *pSMB = NULL;
1758 struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
1759 struct cifs_posix_lock *parm_data;
1760 int rc = 0;
1761 int timeout = 0;
1762 int bytes_returned = 0;
1763 int resp_buf_type = 0;
1764 __u16 params, param_offset, offset, byte_count, count;
1765 struct kvec iov[1];
1766
1767 cFYI(1, ("Posix Lock"));
1768
1769 if (pLockData == NULL)
1770 return EINVAL;
1771
1772 rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
1773
1774 if (rc)
1775 return rc;
1776
1777 pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB;
1778
1779 params = 6;
1780 pSMB->MaxSetupCount = 0;
1781 pSMB->Reserved = 0;
1782 pSMB->Flags = 0;
1783 pSMB->Reserved2 = 0;
1784 param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
1785 offset = param_offset + params;
1786
1787 count = sizeof(struct cifs_posix_lock);
1788 pSMB->MaxParameterCount = cpu_to_le16(2);
1789 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
1790 pSMB->SetupCount = 1;
1791 pSMB->Reserved3 = 0;
1792 if (get_flag)
1793 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
1794 else
1795 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
1796 byte_count = 3 /* pad */ + params + count;
1797 pSMB->DataCount = cpu_to_le16(count);
1798 pSMB->ParameterCount = cpu_to_le16(params);
1799 pSMB->TotalDataCount = pSMB->DataCount;
1800 pSMB->TotalParameterCount = pSMB->ParameterCount;
1801 pSMB->ParameterOffset = cpu_to_le16(param_offset);
1802 parm_data = (struct cifs_posix_lock *)
1803 (((char *) &pSMB->hdr.Protocol) + offset);
1804
1805 parm_data->lock_type = cpu_to_le16(lock_type);
1806 if (waitFlag) {
1807 timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
1808 parm_data->lock_flags = cpu_to_le16(1);
1809 pSMB->Timeout = cpu_to_le32(-1);
1810 } else
1811 pSMB->Timeout = 0;
1812
1813 parm_data->pid = cpu_to_le32(current->tgid);
1814 parm_data->start = cpu_to_le64(pLockData->fl_start);
1815 parm_data->length = cpu_to_le64(len); /* normalize negative numbers */
1816
1817 pSMB->DataOffset = cpu_to_le16(offset);
1818 pSMB->Fid = smb_file_id;
1819 pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK);
1820 pSMB->Reserved4 = 0;
1821 pSMB->hdr.smb_buf_length += byte_count;
1822 pSMB->ByteCount = cpu_to_le16(byte_count);
1823 if (waitFlag) {
1824 rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
1825 (struct smb_hdr *) pSMBr, &bytes_returned);
1826 } else {
1827 iov[0].iov_base = (char *)pSMB;
1828 iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
1829 rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
1830 &resp_buf_type, timeout);
1831 pSMB = NULL; /* request buf already freed by SendReceive2. Do
1832 not try to free it twice below on exit */
1833 pSMBr = (struct smb_com_transaction2_sfi_rsp *)iov[0].iov_base;
1834 }
1835
1836 if (rc) {
1837 cFYI(1, ("Send error in Posix Lock = %d", rc));
1838 } else if (get_flag) {
1839 /* lock structure can be returned on get */
1840 __u16 data_offset;
1841 __u16 data_count;
1842 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
1843
1844 if (rc || (pSMBr->ByteCount < sizeof(struct cifs_posix_lock))) {
1845 rc = -EIO; /* bad smb */
1846 goto plk_err_exit;
1847 }
1848 if (pLockData == NULL) {
1849 rc = -EINVAL;
1850 goto plk_err_exit;
1851 }
1852 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
1853 data_count = le16_to_cpu(pSMBr->t2.DataCount);
1854 if (data_count < sizeof(struct cifs_posix_lock)) {
1855 rc = -EIO;
1856 goto plk_err_exit;
1857 }
1858 parm_data = (struct cifs_posix_lock *)
1859 ((char *)&pSMBr->hdr.Protocol + data_offset);
1860 if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
1861 pLockData->fl_type = F_UNLCK;
1862 }
1863
1864 plk_err_exit:
1865 if (pSMB)
1866 cifs_small_buf_release(pSMB);
1867
1868 if (resp_buf_type == CIFS_SMALL_BUFFER)
1869 cifs_small_buf_release(iov[0].iov_base);
1870 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1871 cifs_buf_release(iov[0].iov_base);
1872
1873 /* Note: On -EAGAIN error only caller can retry on handle based calls
1874 since file handle passed in no longer valid */
1875
1876 return rc;
1877 }
1878
1879
1880 int
1881 CIFSSMBClose(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
1882 {
1883 int rc = 0;
1884 CLOSE_REQ *pSMB = NULL;
1885 cFYI(1, ("In CIFSSMBClose"));
1886
1887 /* do not retry on dead session on close */
1888 rc = small_smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB);
1889 if (rc == -EAGAIN)
1890 return 0;
1891 if (rc)
1892 return rc;
1893
1894 pSMB->FileID = (__u16) smb_file_id;
1895 pSMB->LastWriteTime = 0xFFFFFFFF;
1896 pSMB->ByteCount = 0;
1897 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
1898 cifs_stats_inc(&tcon->num_closes);
1899 if (rc) {
1900 if (rc != -EINTR) {
1901 /* EINTR is expected when user ctl-c to kill app */
1902 cERROR(1, ("Send error in Close = %d", rc));
1903 }
1904 }
1905
1906 /* Since session is dead, file will be closed on server already */
1907 if (rc == -EAGAIN)
1908 rc = 0;
1909
1910 return rc;
1911 }
1912
1913 int
1914 CIFSSMBRename(const int xid, struct cifsTconInfo *tcon,
1915 const char *fromName, const char *toName,
1916 const struct nls_table *nls_codepage, int remap)
1917 {
1918 int rc = 0;
1919 RENAME_REQ *pSMB = NULL;
1920 RENAME_RSP *pSMBr = NULL;
1921 int bytes_returned;
1922 int name_len, name_len2;
1923 __u16 count;
1924
1925 cFYI(1, ("In CIFSSMBRename"));
1926 renameRetry:
1927 rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB,
1928 (void **) &pSMBr);
1929 if (rc)
1930 return rc;
1931
1932 pSMB->BufferFormat = 0x04;
1933 pSMB->SearchAttributes =
1934 cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
1935 ATTR_DIRECTORY);
1936
1937 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1938 name_len =
1939 cifsConvertToUCS((__le16 *) pSMB->OldFileName, fromName,
1940 PATH_MAX, nls_codepage, remap);
1941 name_len++; /* trailing null */
1942 name_len *= 2;
1943 pSMB->OldFileName[name_len] = 0x04; /* pad */
1944 /* protocol requires ASCII signature byte on Unicode string */
1945 pSMB->OldFileName[name_len + 1] = 0x00;
1946 name_len2 =
1947 cifsConvertToUCS((__le16 *) &pSMB->OldFileName[name_len + 2],
1948 toName, PATH_MAX, nls_codepage, remap);
1949 name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
1950 name_len2 *= 2; /* convert to bytes */
1951 } else { /* BB improve the check for buffer overruns BB */
1952 name_len = strnlen(fromName, PATH_MAX);
1953 name_len++; /* trailing null */
1954 strncpy(pSMB->OldFileName, fromName, name_len);
1955 name_len2 = strnlen(toName, PATH_MAX);
1956 name_len2++; /* trailing null */
1957 pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
1958 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
1959 name_len2++; /* trailing null */
1960 name_len2++; /* signature byte */
1961 }
1962
1963 count = 1 /* 1st signature byte */ + name_len + name_len2;
1964 pSMB->hdr.smb_buf_length += count;
1965 pSMB->ByteCount = cpu_to_le16(count);
1966
1967 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1968 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1969 cifs_stats_inc(&tcon->num_renames);
1970 if (rc)
1971 cFYI(1, ("Send error in rename = %d", rc));
1972
1973 cifs_buf_release(pSMB);
1974
1975 if (rc == -EAGAIN)
1976 goto renameRetry;
1977
1978 return rc;
1979 }
1980
1981 int CIFSSMBRenameOpenFile(const int xid, struct cifsTconInfo *pTcon,
1982 int netfid, char *target_name,
1983 const struct nls_table *nls_codepage, int remap)
1984 {
1985 struct smb_com_transaction2_sfi_req *pSMB = NULL;
1986 struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
1987 struct set_file_rename *rename_info;
1988 char *data_offset;
1989 char dummy_string[30];
1990 int rc = 0;
1991 int bytes_returned = 0;
1992 int len_of_str;
1993 __u16 params, param_offset, offset, count, byte_count;
1994
1995 cFYI(1, ("Rename to File by handle"));
1996 rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB,
1997 (void **) &pSMBr);
1998 if (rc)
1999 return rc;
2000
2001 params = 6;
2002 pSMB->MaxSetupCount = 0;
2003 pSMB->Reserved = 0;
2004 pSMB->Flags = 0;
2005 pSMB->Timeout = 0;
2006 pSMB->Reserved2 = 0;
2007 param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
2008 offset = param_offset + params;
2009
2010 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2011 rename_info = (struct set_file_rename *) data_offset;
2012 pSMB->MaxParameterCount = cpu_to_le16(2);
2013 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
2014 pSMB->SetupCount = 1;
2015 pSMB->Reserved3 = 0;
2016 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
2017 byte_count = 3 /* pad */ + params;
2018 pSMB->ParameterCount = cpu_to_le16(params);
2019 pSMB->TotalParameterCount = pSMB->ParameterCount;
2020 pSMB->ParameterOffset = cpu_to_le16(param_offset);
2021 pSMB->DataOffset = cpu_to_le16(offset);
2022 /* construct random name ".cifs_tmp<inodenum><mid>" */
2023 rename_info->overwrite = cpu_to_le32(1);
2024 rename_info->root_fid = 0;
2025 /* unicode only call */
2026 if (target_name == NULL) {
2027 sprintf(dummy_string, "cifs%x", pSMB->hdr.Mid);
2028 len_of_str = cifsConvertToUCS((__le16 *)rename_info->target_name,
2029 dummy_string, 24, nls_codepage, remap);
2030 } else {
2031 len_of_str = cifsConvertToUCS((__le16 *)rename_info->target_name,
2032 target_name, PATH_MAX, nls_codepage,
2033 remap);
2034 }
2035 rename_info->target_name_len = cpu_to_le32(2 * len_of_str);
2036 count = 12 /* sizeof(struct set_file_rename) */ + (2 * len_of_str) + 2;
2037 byte_count += count;
2038 pSMB->DataCount = cpu_to_le16(count);
2039 pSMB->TotalDataCount = pSMB->DataCount;
2040 pSMB->Fid = netfid;
2041 pSMB->InformationLevel =
2042 cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION);
2043 pSMB->Reserved4 = 0;
2044 pSMB->hdr.smb_buf_length += byte_count;
2045 pSMB->ByteCount = cpu_to_le16(byte_count);
2046 rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
2047 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2048 cifs_stats_inc(&pTcon->num_t2renames);
2049 if (rc)
2050 cFYI(1, ("Send error in Rename (by file handle) = %d", rc));
2051
2052 cifs_buf_release(pSMB);
2053
2054 /* Note: On -EAGAIN error only caller can retry on handle based calls
2055 since file handle passed in no longer valid */
2056
2057 return rc;
2058 }
2059
2060 int
2061 CIFSSMBCopy(const int xid, struct cifsTconInfo *tcon, const char *fromName,
2062 const __u16 target_tid, const char *toName, const int flags,
2063 const struct nls_table *nls_codepage, int remap)
2064 {
2065 int rc = 0;
2066 COPY_REQ *pSMB = NULL;
2067 COPY_RSP *pSMBr = NULL;
2068 int bytes_returned;
2069 int name_len, name_len2;
2070 __u16 count;
2071
2072 cFYI(1, ("In CIFSSMBCopy"));
2073 copyRetry:
2074 rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
2075 (void **) &pSMBr);
2076 if (rc)
2077 return rc;
2078
2079 pSMB->BufferFormat = 0x04;
2080 pSMB->Tid2 = target_tid;
2081
2082 pSMB->Flags = cpu_to_le16(flags & COPY_TREE);
2083
2084 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2085 name_len = cifsConvertToUCS((__le16 *) pSMB->OldFileName,
2086 fromName, PATH_MAX, nls_codepage,
2087 remap);
2088 name_len++; /* trailing null */
2089 name_len *= 2;
2090 pSMB->OldFileName[name_len] = 0x04; /* pad */
2091 /* protocol requires ASCII signature byte on Unicode string */
2092 pSMB->OldFileName[name_len + 1] = 0x00;
2093 name_len2 =
2094 cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
2095 toName, PATH_MAX, nls_codepage, remap);
2096 name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
2097 name_len2 *= 2; /* convert to bytes */
2098 } else { /* BB improve the check for buffer overruns BB */
2099 name_len = strnlen(fromName, PATH_MAX);
2100 name_len++; /* trailing null */
2101 strncpy(pSMB->OldFileName, fromName, name_len);
2102 name_len2 = strnlen(toName, PATH_MAX);
2103 name_len2++; /* trailing null */
2104 pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
2105 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
2106 name_len2++; /* trailing null */
2107 name_len2++; /* signature byte */
2108 }
2109
2110 count = 1 /* 1st signature byte */ + name_len + name_len2;
2111 pSMB->hdr.smb_buf_length += count;
2112 pSMB->ByteCount = cpu_to_le16(count);
2113
2114 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2115 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2116 if (rc) {
2117 cFYI(1, ("Send error in copy = %d with %d files copied",
2118 rc, le16_to_cpu(pSMBr->CopyCount)));
2119 }
2120 if (pSMB)
2121 cifs_buf_release(pSMB);
2122
2123 if (rc == -EAGAIN)
2124 goto copyRetry;
2125
2126 return rc;
2127 }
2128
2129 int
2130 CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon,
2131 const char *fromName, const char *toName,
2132 const struct nls_table *nls_codepage)
2133 {
2134 TRANSACTION2_SPI_REQ *pSMB = NULL;
2135 TRANSACTION2_SPI_RSP *pSMBr = NULL;
2136 char *data_offset;
2137 int name_len;
2138 int name_len_target;
2139 int rc = 0;
2140 int bytes_returned = 0;
2141 __u16 params, param_offset, offset, byte_count;
2142
2143 cFYI(1, ("In Symlink Unix style"));
2144 createSymLinkRetry:
2145 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2146 (void **) &pSMBr);
2147 if (rc)
2148 return rc;
2149
2150 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2151 name_len =
2152 cifs_strtoUCS((__le16 *) pSMB->FileName, fromName, PATH_MAX
2153 /* find define for this maxpathcomponent */
2154 , nls_codepage);
2155 name_len++; /* trailing null */
2156 name_len *= 2;
2157
2158 } else { /* BB improve the check for buffer overruns BB */
2159 name_len = strnlen(fromName, PATH_MAX);
2160 name_len++; /* trailing null */
2161 strncpy(pSMB->FileName, fromName, name_len);
2162 }
2163 params = 6 + name_len;
2164 pSMB->MaxSetupCount = 0;
2165 pSMB->Reserved = 0;
2166 pSMB->Flags = 0;
2167 pSMB->Timeout = 0;
2168 pSMB->Reserved2 = 0;
2169 param_offset = offsetof(struct smb_com_transaction2_spi_req,
2170 InformationLevel) - 4;
2171 offset = param_offset + params;
2172
2173 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2174 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2175 name_len_target =
2176 cifs_strtoUCS((__le16 *) data_offset, toName, PATH_MAX
2177 /* find define for this maxpathcomponent */
2178 , nls_codepage);
2179 name_len_target++; /* trailing null */
2180 name_len_target *= 2;
2181 } else { /* BB improve the check for buffer overruns BB */
2182 name_len_target = strnlen(toName, PATH_MAX);
2183 name_len_target++; /* trailing null */
2184 strncpy(data_offset, toName, name_len_target);
2185 }
2186
2187 pSMB->MaxParameterCount = cpu_to_le16(2);
2188 /* BB find exact max on data count below from sess */
2189 pSMB->MaxDataCount = cpu_to_le16(1000);
2190 pSMB->SetupCount = 1;
2191 pSMB->Reserved3 = 0;
2192 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2193 byte_count = 3 /* pad */ + params + name_len_target;
2194 pSMB->DataCount = cpu_to_le16(name_len_target);
2195 pSMB->ParameterCount = cpu_to_le16(params);
2196 pSMB->TotalDataCount = pSMB->DataCount;
2197 pSMB->TotalParameterCount = pSMB->ParameterCount;
2198 pSMB->ParameterOffset = cpu_to_le16(param_offset);
2199 pSMB->DataOffset = cpu_to_le16(offset);
2200 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_LINK);
2201 pSMB->Reserved4 = 0;
2202 pSMB->hdr.smb_buf_length += byte_count;
2203 pSMB->ByteCount = cpu_to_le16(byte_count);
2204 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2205 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2206 cifs_stats_inc(&tcon->num_symlinks);
2207 if (rc)
2208 cFYI(1, ("Send error in SetPathInfo create symlink = %d", rc));
2209
2210 if (pSMB)
2211 cifs_buf_release(pSMB);
2212
2213 if (rc == -EAGAIN)
2214 goto createSymLinkRetry;
2215
2216 return rc;
2217 }
2218
2219 int
2220 CIFSUnixCreateHardLink(const int xid, struct cifsTconInfo *tcon,
2221 const char *fromName, const char *toName,
2222 const struct nls_table *nls_codepage, int remap)
2223 {
2224 TRANSACTION2_SPI_REQ *pSMB = NULL;
2225 TRANSACTION2_SPI_RSP *pSMBr = NULL;
2226 char *data_offset;
2227 int name_len;
2228 int name_len_target;
2229 int rc = 0;
2230 int bytes_returned = 0;
2231 __u16 params, param_offset, offset, byte_count;
2232
2233 cFYI(1, ("In Create Hard link Unix style"));
2234 createHardLinkRetry:
2235 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2236 (void **) &pSMBr);
2237 if (rc)
2238 return rc;
2239
2240 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2241 name_len = cifsConvertToUCS((__le16 *) pSMB->FileName, toName,
2242 PATH_MAX, nls_codepage, remap);
2243 name_len++; /* trailing null */
2244 name_len *= 2;
2245
2246 } else { /* BB improve the check for buffer overruns BB */
2247 name_len = strnlen(toName, PATH_MAX);
2248 name_len++; /* trailing null */
2249 strncpy(pSMB->FileName, toName, name_len);
2250 }
2251 params = 6 + name_len;
2252 pSMB->MaxSetupCount = 0;
2253 pSMB->Reserved = 0;
2254 pSMB->Flags = 0;
2255 pSMB->Timeout = 0;
2256 pSMB->Reserved2 = 0;
2257 param_offset = offsetof(struct smb_com_transaction2_spi_req,
2258 InformationLevel) - 4;
2259 offset = param_offset + params;
2260
2261 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2262 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2263 name_len_target =
2264 cifsConvertToUCS((__le16 *) data_offset, fromName, PATH_MAX,
2265 nls_codepage, remap);
2266 name_len_target++; /* trailing null */
2267 name_len_target *= 2;
2268 } else { /* BB improve the check for buffer overruns BB */
2269 name_len_target = strnlen(fromName, PATH_MAX);
2270 name_len_target++; /* trailing null */
2271 strncpy(data_offset, fromName, name_len_target);
2272 }
2273
2274 pSMB->MaxParameterCount = cpu_to_le16(2);
2275 /* BB find exact max on data count below from sess*/
2276 pSMB->MaxDataCount = cpu_to_le16(1000);
2277 pSMB->SetupCount = 1;
2278 pSMB->Reserved3 = 0;
2279 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2280 byte_count = 3 /* pad */ + params + name_len_target;
2281 pSMB->ParameterCount = cpu_to_le16(params);
2282 pSMB->TotalParameterCount = pSMB->ParameterCount;
2283 pSMB->DataCount = cpu_to_le16(name_len_target);
2284 pSMB->TotalDataCount = pSMB->DataCount;
2285 pSMB->ParameterOffset = cpu_to_le16(param_offset);
2286 pSMB->DataOffset = cpu_to_le16(offset);
2287 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK);
2288 pSMB->Reserved4 = 0;
2289 pSMB->hdr.smb_buf_length += byte_count;
2290 pSMB->ByteCount = cpu_to_le16(byte_count);
2291 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2292 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2293 cifs_stats_inc(&tcon->num_hardlinks);
2294 if (rc)
2295 cFYI(1, ("Send error in SetPathInfo (hard link) = %d", rc));
2296
2297 cifs_buf_release(pSMB);
2298 if (rc == -EAGAIN)
2299 goto createHardLinkRetry;
2300
2301 return rc;
2302 }
2303
2304 int
2305 CIFSCreateHardLink(const int xid, struct cifsTconInfo *tcon,
2306 const char *fromName, const char *toName,
2307 const struct nls_table *nls_codepage, int remap)
2308 {
2309 int rc = 0;
2310 NT_RENAME_REQ *pSMB = NULL;
2311 RENAME_RSP *pSMBr = NULL;
2312 int bytes_returned;
2313 int name_len, name_len2;
2314 __u16 count;
2315
2316 cFYI(1, ("In CIFSCreateHardLink"));
2317 winCreateHardLinkRetry:
2318
2319 rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB,
2320 (void **) &pSMBr);
2321 if (rc)
2322 return rc;
2323
2324 pSMB->SearchAttributes =
2325 cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
2326 ATTR_DIRECTORY);
2327 pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK);
2328 pSMB->ClusterCount = 0;
2329
2330 pSMB->BufferFormat = 0x04;
2331
2332 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2333 name_len =
2334 cifsConvertToUCS((__le16 *) pSMB->OldFileName, fromName,
2335 PATH_MAX, nls_codepage, remap);
2336 name_len++; /* trailing null */
2337 name_len *= 2;
2338 pSMB->OldFileName[name_len] = 0; /* pad */
2339 pSMB->OldFileName[name_len + 1] = 0x04;
2340 name_len2 =
2341 cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
2342 toName, PATH_MAX, nls_codepage, remap);
2343 name_len2 += 1 /* trailing null */ + 1 /* Signature word */ ;
2344 name_len2 *= 2; /* convert to bytes */
2345 } else { /* BB improve the check for buffer overruns BB */
2346 name_len = strnlen(fromName, PATH_MAX);
2347 name_len++; /* trailing null */
2348 strncpy(pSMB->OldFileName, fromName, name_len);
2349 name_len2 = strnlen(toName, PATH_MAX);
2350 name_len2++; /* trailing null */
2351 pSMB->OldFileName[name_len] = 0x04; /* 2nd buffer format */
2352 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
2353 name_len2++; /* trailing null */
2354 name_len2++; /* signature byte */
2355 }
2356
2357 count = 1 /* string type byte */ + name_len + name_len2;
2358 pSMB->hdr.smb_buf_length += count;
2359 pSMB->ByteCount = cpu_to_le16(count);
2360
2361 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2362 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2363 cifs_stats_inc(&tcon->num_hardlinks);
2364 if (rc)
2365 cFYI(1, ("Send error in hard link (NT rename) = %d", rc));
2366
2367 cifs_buf_release(pSMB);
2368 if (rc == -EAGAIN)
2369 goto winCreateHardLinkRetry;
2370
2371 return rc;
2372 }
2373
2374 int
2375 CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
2376 const unsigned char *searchName,
2377 char *symlinkinfo, const int buflen,
2378 const struct nls_table *nls_codepage)
2379 {
2380 /* SMB_QUERY_FILE_UNIX_LINK */
2381 TRANSACTION2_QPI_REQ *pSMB = NULL;
2382 TRANSACTION2_QPI_RSP *pSMBr = NULL;
2383 int rc = 0;
2384 int bytes_returned;
2385 int name_len;
2386 __u16 params, byte_count;
2387
2388 cFYI(1, ("In QPathSymLinkInfo (Unix) for path %s", searchName));
2389
2390 querySymLinkRetry:
2391 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2392 (void **) &pSMBr);
2393 if (rc)
2394 return rc;
2395
2396 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2397 name_len =
2398 cifs_strtoUCS((__le16 *) pSMB->FileName, searchName,
2399 PATH_MAX, nls_codepage);
2400 name_len++; /* trailing null */
2401 name_len *= 2;
2402 } else { /* BB improve the check for buffer overruns BB */
2403 name_len = strnlen(searchName, PATH_MAX);
2404 name_len++; /* trailing null */
2405 strncpy(pSMB->FileName, searchName, name_len);
2406 }
2407
2408 params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
2409 pSMB->TotalDataCount = 0;
2410 pSMB->MaxParameterCount = cpu_to_le16(2);
2411 /* BB find exact max data count below from sess structure BB */
2412 pSMB->MaxDataCount = cpu_to_le16(4000);
2413 pSMB->MaxSetupCount = 0;
2414 pSMB->Reserved = 0;
2415 pSMB->Flags = 0;
2416 pSMB->Timeout = 0;
2417 pSMB->Reserved2 = 0;
2418 pSMB->ParameterOffset = cpu_to_le16(offsetof(
2419 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
2420 pSMB->DataCount = 0;
2421 pSMB->DataOffset = 0;
2422 pSMB->SetupCount = 1;
2423 pSMB->Reserved3 = 0;
2424 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
2425 byte_count = params + 1 /* pad */ ;
2426 pSMB->TotalParameterCount = cpu_to_le16(params);
2427 pSMB->ParameterCount = pSMB->TotalParameterCount;
2428 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK);
2429 pSMB->Reserved4 = 0;
2430 pSMB->hdr.smb_buf_length += byte_count;
2431 pSMB->ByteCount = cpu_to_le16(byte_count);
2432
2433 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2434 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2435 if (rc) {
2436 cFYI(1, ("Send error in QuerySymLinkInfo = %d", rc));
2437 } else {
2438 /* decode response */
2439
2440 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
2441 if (rc || (pSMBr->ByteCount < 2))
2442 /* BB also check enough total bytes returned */
2443 rc = -EIO; /* bad smb */
2444 else {
2445 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
2446 __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
2447
2448 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
2449 name_len = UniStrnlen((wchar_t *) ((char *)
2450 &pSMBr->hdr.Protocol + data_offset),
2451 min_t(const int, buflen, count) / 2);
2452 /* BB FIXME investigate remapping reserved chars here */
2453 cifs_strfromUCS_le(symlinkinfo,
2454 (__le16 *) ((char *)&pSMBr->hdr.Protocol
2455 + data_offset),
2456 name_len, nls_codepage);
2457 } else {
2458 strncpy(symlinkinfo,
2459 (char *) &pSMBr->hdr.Protocol +
2460 data_offset,
2461 min_t(const int, buflen, count));
2462 }
2463 symlinkinfo[buflen] = 0;
2464 /* just in case so calling code does not go off the end of buffer */
2465 }
2466 }
2467 cifs_buf_release(pSMB);
2468 if (rc == -EAGAIN)
2469 goto querySymLinkRetry;
2470 return rc;
2471 }
2472
2473 #ifdef CONFIG_CIFS_EXPERIMENTAL
2474 /* Initialize NT TRANSACT SMB into small smb request buffer.
2475 This assumes that all NT TRANSACTS that we init here have
2476 total parm and data under about 400 bytes (to fit in small cifs
2477 buffer size), which is the case so far, it easily fits. NB:
2478 Setup words themselves and ByteCount
2479 MaxSetupCount (size of returned setup area) and
2480 MaxParameterCount (returned parms size) must be set by caller */
2481 static int
2482 smb_init_nttransact(const __u16 sub_command, const int setup_count,
2483 const int parm_len, struct cifsTconInfo *tcon,
2484 void **ret_buf)
2485 {
2486 int rc;
2487 __u32 temp_offset;
2488 struct smb_com_ntransact_req *pSMB;
2489
2490 rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
2491 (void **)&pSMB);
2492 if (rc)
2493 return rc;
2494 *ret_buf = (void *)pSMB;
2495 pSMB->Reserved = 0;
2496 pSMB->TotalParameterCount = cpu_to_le32(parm_len);
2497 pSMB->TotalDataCount = 0;
2498 pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
2499 MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
2500 pSMB->ParameterCount = pSMB->TotalParameterCount;
2501 pSMB->DataCount = pSMB->TotalDataCount;
2502 temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
2503 (setup_count * 2) - 4 /* for rfc1001 length itself */;
2504 pSMB->ParameterOffset = cpu_to_le32(temp_offset);
2505 pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
2506 pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
2507 pSMB->SubCommand = cpu_to_le16(sub_command);
2508 return 0;
2509 }
2510
2511 static int
2512 validate_ntransact(char *buf, char **ppparm, char **ppdata,
2513 __u32 *pparmlen, __u32 *pdatalen)
2514 {
2515 char *end_of_smb;
2516 __u32 data_count, data_offset, parm_count, parm_offset;
2517 struct smb_com_ntransact_rsp *pSMBr;
2518
2519 *pdatalen = 0;
2520 *pparmlen = 0;
2521
2522 if (buf == NULL)
2523 return -EINVAL;
2524
2525 pSMBr = (struct smb_com_ntransact_rsp *)buf;
2526
2527 /* ByteCount was converted from little endian in SendReceive */
2528 end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
2529 (char *)&pSMBr->ByteCount;
2530
2531 data_offset = le32_to_cpu(pSMBr->DataOffset);
2532 data_count = le32_to_cpu(pSMBr->DataCount);
2533 parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
2534 parm_count = le32_to_cpu(pSMBr->ParameterCount);
2535
2536 *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
2537 *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
2538
2539 /* should we also check that parm and data areas do not overlap? */
2540 if (*ppparm > end_of_smb) {
2541 cFYI(1, ("parms start after end of smb"));
2542 return -EINVAL;
2543 } else if (parm_count + *ppparm > end_of_smb) {
2544 cFYI(1, ("parm end after end of smb"));
2545 return -EINVAL;
2546 } else if (*ppdata > end_of_smb) {
2547 cFYI(1, ("data starts after end of smb"));
2548 return -EINVAL;
2549 } else if (data_count + *ppdata > end_of_smb) {
2550 cFYI(1, ("data %p + count %d (%p) ends after end of smb %p start %p",
2551 *ppdata, data_count, (data_count + *ppdata),
2552 end_of_smb, pSMBr));
2553 return -EINVAL;
2554 } else if (parm_count + data_count > pSMBr->ByteCount) {
2555 cFYI(1, ("parm count and data count larger than SMB"));
2556 return -EINVAL;
2557 }
2558 *pdatalen = data_count;
2559 *pparmlen = parm_count;
2560 return 0;
2561 }
2562 #endif /* CIFS_EXPERIMENTAL */
2563
2564 int
2565 CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
2566 const unsigned char *searchName,
2567 char *symlinkinfo, const int buflen, __u16 fid,
2568 const struct nls_table *nls_codepage)
2569 {
2570 int rc = 0;
2571 int bytes_returned;
2572 int name_len;
2573 struct smb_com_transaction_ioctl_req *pSMB;
2574 struct smb_com_transaction_ioctl_rsp *pSMBr;
2575
2576 cFYI(1, ("In Windows reparse style QueryLink for path %s", searchName));
2577 rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
2578 (void **) &pSMBr);
2579 if (rc)
2580 return rc;
2581
2582 pSMB->TotalParameterCount = 0 ;
2583 pSMB->TotalDataCount = 0;
2584 pSMB->MaxParameterCount = cpu_to_le32(2);
2585 /* BB find exact data count max from sess structure BB */
2586 pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
2587 MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
2588 pSMB->MaxSetupCount = 4;
2589 pSMB->Reserved = 0;
2590 pSMB->ParameterOffset = 0;
2591 pSMB->DataCount = 0;
2592 pSMB->DataOffset = 0;
2593 pSMB->SetupCount = 4;
2594 pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
2595 pSMB->ParameterCount = pSMB->TotalParameterCount;
2596 pSMB->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT);
2597 pSMB->IsFsctl = 1; /* FSCTL */
2598 pSMB->IsRootFlag = 0;
2599 pSMB->Fid = fid; /* file handle always le */
2600 pSMB->ByteCount = 0;
2601
2602 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2603 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2604 if (rc) {
2605 cFYI(1, ("Send error in QueryReparseLinkInfo = %d", rc));
2606 } else { /* decode response */
2607 __u32 data_offset = le32_to_cpu(pSMBr->DataOffset);
2608 __u32 data_count = le32_to_cpu(pSMBr->DataCount);
2609 if ((pSMBr->ByteCount < 2) || (data_offset > 512))
2610 /* BB also check enough total bytes returned */
2611 rc = -EIO; /* bad smb */
2612 else {
2613 if (data_count && (data_count < 2048)) {
2614 char *end_of_smb = 2 /* sizeof byte count */ +
2615 pSMBr->ByteCount +
2616 (char *)&pSMBr->ByteCount;
2617
2618 struct reparse_data *reparse_buf =
2619 (struct reparse_data *)
2620 ((char *)&pSMBr->hdr.Protocol
2621 + data_offset);
2622 if ((char *)reparse_buf >= end_of_smb) {
2623 rc = -EIO;
2624 goto qreparse_out;
2625 }
2626 if ((reparse_buf->LinkNamesBuf +
2627 reparse_buf->TargetNameOffset +
2628 reparse_buf->TargetNameLen) >
2629 end_of_smb) {
2630 cFYI(1, ("reparse buf beyond SMB"));
2631 rc = -EIO;
2632 goto qreparse_out;
2633 }
2634
2635 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
2636 name_len = UniStrnlen((wchar_t *)
2637 (reparse_buf->LinkNamesBuf +
2638 reparse_buf->TargetNameOffset),
2639 min(buflen/2,
2640 reparse_buf->TargetNameLen / 2));
2641 cifs_strfromUCS_le(symlinkinfo,
2642 (__le16 *) (reparse_buf->LinkNamesBuf +
2643 reparse_buf->TargetNameOffset),
2644 name_len, nls_codepage);
2645 } else { /* ASCII names */
2646 strncpy(symlinkinfo,
2647 reparse_buf->LinkNamesBuf +
2648 reparse_buf->TargetNameOffset,
2649 min_t(const int, buflen,
2650 reparse_buf->TargetNameLen));
2651 }
2652 } else {
2653 rc = -EIO;
2654 cFYI(1, ("Invalid return data count on "
2655 "get reparse info ioctl"));
2656 }
2657 symlinkinfo[buflen] = 0; /* just in case so the caller
2658 does not go off the end of the buffer */
2659 cFYI(1, ("readlink result - %s", symlinkinfo));
2660 }
2661 }
2662 qreparse_out:
2663 cifs_buf_release(pSMB);
2664
2665 /* Note: On -EAGAIN error only caller can retry on handle based calls
2666 since file handle passed in no longer valid */
2667
2668 return rc;
2669 }
2670
2671 #ifdef CONFIG_CIFS_POSIX
2672
2673 /*Convert an Access Control Entry from wire format to local POSIX xattr format*/
2674 static void cifs_convert_ace(posix_acl_xattr_entry *ace,
2675 struct cifs_posix_ace *cifs_ace)
2676 {
2677 /* u8 cifs fields do not need le conversion */
2678 ace->e_perm = cpu_to_le16(cifs_ace->cifs_e_perm);
2679 ace->e_tag = cpu_to_le16(cifs_ace->cifs_e_tag);
2680 ace->e_id = cpu_to_le32(le64_to_cpu(cifs_ace->cifs_uid));
2681 /* cFYI(1,("perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id)); */
2682
2683 return;
2684 }
2685
2686 /* Convert ACL from CIFS POSIX wire format to local Linux POSIX ACL xattr */
2687 static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen,
2688 const int acl_type, const int size_of_data_area)
2689 {
2690 int size = 0;
2691 int i;
2692 __u16 count;
2693 struct cifs_posix_ace *pACE;
2694 struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src;
2695 posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)trgt;
2696
2697 if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION)
2698 return -EOPNOTSUPP;
2699
2700 if (acl_type & ACL_TYPE_ACCESS) {
2701 count = le16_to_cpu(cifs_acl->access_entry_count);
2702 pACE = &cifs_acl->ace_array[0];
2703 size = sizeof(struct cifs_posix_acl);
2704 size += sizeof(struct cifs_posix_ace) * count;
2705 /* check if we would go beyond end of SMB */
2706 if (size_of_data_area < size) {
2707 cFYI(1, ("bad CIFS POSIX ACL size %d vs. %d",
2708 size_of_data_area, size));
2709 return -EINVAL;
2710 }
2711 } else if (acl_type & ACL_TYPE_DEFAULT) {
2712 count = le16_to_cpu(cifs_acl->access_entry_count);
2713 size = sizeof(struct cifs_posix_acl);
2714 size += sizeof(struct cifs_posix_ace) * count;
2715 /* skip past access ACEs to get to default ACEs */
2716 pACE = &cifs_acl->ace_array[count];
2717 count = le16_to_cpu(cifs_acl->default_entry_count);
2718 size += sizeof(struct cifs_posix_ace) * count;
2719 /* check if we would go beyond end of SMB */
2720 if (size_of_data_area < size)
2721 return -EINVAL;
2722 } else {
2723 /* illegal type */
2724 return -EINVAL;
2725 }
2726
2727 size = posix_acl_xattr_size(count);
2728 if ((buflen == 0) || (local_acl == NULL)) {
2729 /* used to query ACL EA size */
2730 } else if (size > buflen) {
2731 return -ERANGE;
2732 } else /* buffer big enough */ {
2733 local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
2734 for (i = 0; i < count ; i++) {
2735 cifs_convert_ace(&local_acl->a_entries[i], pACE);
2736 pACE++;
2737 }
2738 }
2739 return size;
2740 }
2741
2742 static __u16 convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace,
2743 const posix_acl_xattr_entry *local_ace)
2744 {
2745 __u16 rc = 0; /* 0 = ACL converted ok */
2746
2747 cifs_ace->cifs_e_perm = le16_to_cpu(local_ace->e_perm);
2748 cifs_ace->cifs_e_tag = le16_to_cpu(local_ace->e_tag);
2749 /* BB is there a better way to handle the large uid? */
2750 if (local_ace->e_id == cpu_to_le32(-1)) {
2751 /* Probably no need to le convert -1 on any arch but can not hurt */
2752 cifs_ace->cifs_uid = cpu_to_le64(-1);
2753 } else
2754 cifs_ace->cifs_uid = cpu_to_le64(le32_to_cpu(local_ace->e_id));
2755 /*cFYI(1,("perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id));*/
2756 return rc;
2757 }
2758
2759 /* Convert ACL from local Linux POSIX xattr to CIFS POSIX ACL wire format */
2760 static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL,
2761 const int buflen, const int acl_type)
2762 {
2763 __u16 rc = 0;
2764 struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data;
2765 posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)pACL;
2766 int count;
2767 int i;
2768
2769 if ((buflen == 0) || (pACL == NULL) || (cifs_acl == NULL))
2770 return 0;
2771
2772 count = posix_acl_xattr_count((size_t)buflen);
2773 cFYI(1, ("setting acl with %d entries from buf of length %d and "
2774 "version of %d",
2775 count, buflen, le32_to_cpu(local_acl->a_version)));
2776 if (le32_to_cpu(local_acl->a_version) != 2) {
2777 cFYI(1, ("unknown POSIX ACL version %d",
2778 le32_to_cpu(local_acl->a_version)));
2779 return 0;
2780 }
2781 cifs_acl->version = cpu_to_le16(1);
2782 if (acl_type == ACL_TYPE_ACCESS)
2783 cifs_acl->access_entry_count = cpu_to_le16(count);
2784 else if (acl_type == ACL_TYPE_DEFAULT)
2785 cifs_acl->default_entry_count = cpu_to_le16(count);
2786 else {
2787 cFYI(1, ("unknown ACL type %d", acl_type));
2788 return 0;
2789 }
2790 for (i = 0; i < count; i++) {
2791 rc = convert_ace_to_cifs_ace(&cifs_acl->ace_array[i],
2792 &local_acl->a_entries[i]);
2793 if (rc != 0) {
2794 /* ACE not converted */
2795 break;
2796 }
2797 }
2798 if (rc == 0) {
2799 rc = (__u16)(count * sizeof(struct cifs_posix_ace));
2800 rc += sizeof(struct cifs_posix_acl);
2801 /* BB add check to make sure ACL does not overflow SMB */
2802 }
2803 return rc;
2804 }
2805
2806 int
2807 CIFSSMBGetPosixACL(const int xid, struct cifsTconInfo *tcon,
2808 const unsigned char *searchName,
2809 char *acl_inf, const int buflen, const int acl_type,
2810 const struct nls_table *nls_codepage, int remap)
2811 {
2812 /* SMB_QUERY_POSIX_ACL */
2813 TRANSACTION2_QPI_REQ *pSMB = NULL;
2814 TRANSACTION2_QPI_RSP *pSMBr = NULL;
2815 int rc = 0;
2816 int bytes_returned;
2817 int name_len;
2818 __u16 params, byte_count;
2819
2820 cFYI(1, ("In GetPosixACL (Unix) for path %s", searchName));
2821
2822 queryAclRetry:
2823 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2824 (void **) &pSMBr);
2825 if (rc)
2826 return rc;
2827
2828 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2829 name_len =
2830 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
2831 PATH_MAX, nls_codepage, remap);
2832 name_len++; /* trailing null */
2833 name_len *= 2;
2834 pSMB->FileName[name_len] = 0;
2835 pSMB->FileName[name_len+1] = 0;
2836 } else { /* BB improve the check for buffer overruns BB */
2837 name_len = strnlen(searchName, PATH_MAX);
2838 name_len++; /* trailing null */
2839 strncpy(pSMB->FileName, searchName, name_len);
2840 }
2841
2842 params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
2843 pSMB->TotalDataCount = 0;
2844 pSMB->MaxParameterCount = cpu_to_le16(2);
2845 /* BB find exact max data count below from sess structure BB */
2846 pSMB->MaxDataCount = cpu_to_le16(4000);
2847 pSMB->MaxSetupCount = 0;
2848 pSMB->Reserved = 0;
2849 pSMB->Flags = 0;
2850 pSMB->Timeout = 0;
2851 pSMB->Reserved2 = 0;
2852 pSMB->ParameterOffset = cpu_to_le16(
2853 offsetof(struct smb_com_transaction2_qpi_req,
2854 InformationLevel) - 4);
2855 pSMB->DataCount = 0;
2856 pSMB->DataOffset = 0;
2857 pSMB->SetupCount = 1;
2858 pSMB->Reserved3 = 0;
2859 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
2860 byte_count = params + 1 /* pad */ ;
2861 pSMB->TotalParameterCount = cpu_to_le16(params);
2862 pSMB->ParameterCount = pSMB->TotalParameterCount;
2863 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL);
2864 pSMB->Reserved4 = 0;
2865 pSMB->hdr.smb_buf_length += byte_count;
2866 pSMB->ByteCount = cpu_to_le16(byte_count);
2867
2868 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2869 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2870 cifs_stats_inc(&tcon->num_acl_get);
2871 if (rc) {
2872 cFYI(1, ("Send error in Query POSIX ACL = %d", rc));
2873 } else {
2874 /* decode response */
2875
2876 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
2877 if (rc || (pSMBr->ByteCount < 2))
2878 /* BB also check enough total bytes returned */
2879 rc = -EIO; /* bad smb */
2880 else {
2881 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
2882 __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
2883 rc = cifs_copy_posix_acl(acl_inf,
2884 (char *)&pSMBr->hdr.Protocol+data_offset,
2885 buflen, acl_type, count);
2886 }
2887 }
2888 cifs_buf_release(pSMB);
2889 if (rc == -EAGAIN)
2890 goto queryAclRetry;
2891 return rc;
2892 }
2893
2894 int
2895 CIFSSMBSetPosixACL(const int xid, struct cifsTconInfo *tcon,
2896 const unsigned char *fileName,
2897 const char *local_acl, const int buflen,
2898 const int acl_type,
2899 const struct nls_table *nls_codepage, int remap)
2900 {
2901 struct smb_com_transaction2_spi_req *pSMB = NULL;
2902 struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
2903 char *parm_data;
2904 int name_len;
2905 int rc = 0;
2906 int bytes_returned = 0;
2907 __u16 params, byte_count, data_count, param_offset, offset;
2908
2909 cFYI(1, ("In SetPosixACL (Unix) for path %s", fileName));
2910 setAclRetry:
2911 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2912 (void **) &pSMBr);
2913 if (rc)
2914 return rc;
2915 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2916 name_len =
2917 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
2918 PATH_MAX, nls_codepage, remap);
2919 name_len++; /* trailing null */
2920 name_len *= 2;
2921 } else { /* BB improve the check for buffer overruns BB */
2922 name_len = strnlen(fileName, PATH_MAX);
2923 name_len++; /* trailing null */
2924 strncpy(pSMB->FileName, fileName, name_len);
2925 }
2926 params = 6 + name_len;
2927 pSMB->MaxParameterCount = cpu_to_le16(2);
2928 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB size from sess */
2929 pSMB->MaxSetupCount = 0;
2930 pSMB->Reserved = 0;
2931 pSMB->Flags = 0;
2932 pSMB->Timeout = 0;
2933 pSMB->Reserved2 = 0;
2934 param_offset = offsetof(struct smb_com_transaction2_spi_req,
2935 InformationLevel) - 4;
2936 offset = param_offset + params;
2937 parm_data = ((char *) &pSMB->hdr.Protocol) + offset;
2938 pSMB->ParameterOffset = cpu_to_le16(param_offset);
2939
2940 /* convert to on the wire format for POSIX ACL */
2941 data_count = ACL_to_cifs_posix(parm_data, local_acl, buflen, acl_type);
2942
2943 if (data_count == 0) {
2944 rc = -EOPNOTSUPP;
2945 goto setACLerrorExit;
2946 }
2947 pSMB->DataOffset = cpu_to_le16(offset);
2948 pSMB->SetupCount = 1;
2949 pSMB->Reserved3 = 0;
2950 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2951 pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL);
2952 byte_count = 3 /* pad */ + params + data_count;
2953 pSMB->DataCount = cpu_to_le16(data_count);
2954 pSMB->TotalDataCount = pSMB->DataCount;
2955 pSMB->ParameterCount = cpu_to_le16(params);
2956 pSMB->TotalParameterCount = pSMB->ParameterCount;
2957 pSMB->Reserved4 = 0;
2958 pSMB->hdr.smb_buf_length += byte_count;
2959 pSMB->ByteCount = cpu_to_le16(byte_count);
2960 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2961 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2962 if (rc)
2963 cFYI(1, ("Set POSIX ACL returned %d", rc));
2964
2965 setACLerrorExit:
2966 cifs_buf_release(pSMB);
2967 if (rc == -EAGAIN)
2968 goto setAclRetry;
2969 return rc;
2970 }
2971
2972 /* BB fix tabs in this function FIXME BB */
2973 int
2974 CIFSGetExtAttr(const int xid, struct cifsTconInfo *tcon,
2975 const int netfid, __u64 *pExtAttrBits, __u64 *pMask)
2976 {
2977 int rc = 0;
2978 struct smb_t2_qfi_req *pSMB = NULL;
2979 struct smb_t2_qfi_rsp *pSMBr = NULL;
2980 int bytes_returned;
2981 __u16 params, byte_count;
2982
2983 cFYI(1, ("In GetExtAttr"));
2984 if (tcon == NULL)
2985 return -ENODEV;
2986
2987 GetExtAttrRetry:
2988 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2989 (void **) &pSMBr);
2990 if (rc)
2991 return rc;
2992
2993 params = 2 /* level */ + 2 /* fid */;
2994 pSMB->t2.TotalDataCount = 0;
2995 pSMB->t2.MaxParameterCount = cpu_to_le16(4);
2996 /* BB find exact max data count below from sess structure BB */
2997 pSMB->t2.MaxDataCount = cpu_to_le16(4000);
2998 pSMB->t2.MaxSetupCount = 0;
2999 pSMB->t2.Reserved = 0;
3000 pSMB->t2.Flags = 0;
3001 pSMB->t2.Timeout = 0;
3002 pSMB->t2.Reserved2 = 0;
3003 pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
3004 Fid) - 4);
3005 pSMB->t2.DataCount = 0;
3006 pSMB->t2.DataOffset = 0;
3007 pSMB->t2.SetupCount = 1;
3008 pSMB->t2.Reserved3 = 0;
3009 pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
3010 byte_count = params + 1 /* pad */ ;
3011 pSMB->t2.TotalParameterCount = cpu_to_le16(params);
3012 pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
3013 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS);
3014 pSMB->Pad = 0;
3015 pSMB->Fid = netfid;
3016 pSMB->hdr.smb_buf_length += byte_count;
3017 pSMB->t2.ByteCount = cpu_to_le16(byte_count);
3018
3019 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3020 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3021 if (rc) {
3022 cFYI(1, ("error %d in GetExtAttr", rc));
3023 } else {
3024 /* decode response */
3025 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3026 if (rc || (pSMBr->ByteCount < 2))
3027 /* BB also check enough total bytes returned */
3028 /* If rc should we check for EOPNOSUPP and
3029 disable the srvino flag? or in caller? */
3030 rc = -EIO; /* bad smb */
3031 else {
3032 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3033 __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
3034 struct file_chattr_info *pfinfo;
3035 /* BB Do we need a cast or hash here ? */
3036 if (count != 16) {
3037 cFYI(1, ("Illegal size ret in GetExtAttr"));
3038 rc = -EIO;
3039 goto GetExtAttrOut;
3040 }
3041 pfinfo = (struct file_chattr_info *)
3042 (data_offset + (char *) &pSMBr->hdr.Protocol);
3043 *pExtAttrBits = le64_to_cpu(pfinfo->mode);
3044 *pMask = le64_to_cpu(pfinfo->mask);
3045 }
3046 }
3047 GetExtAttrOut:
3048 cifs_buf_release(pSMB);
3049 if (rc == -EAGAIN)
3050 goto GetExtAttrRetry;
3051 return rc;
3052 }
3053
3054 #endif /* CONFIG_POSIX */
3055
3056 #ifdef CONFIG_CIFS_EXPERIMENTAL
3057 /* Get Security Descriptor (by handle) from remote server for a file or dir */
3058 int
3059 CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
3060 struct cifs_ntsd **acl_inf, __u32 *pbuflen)
3061 {
3062 int rc = 0;
3063 int buf_type = 0;
3064 QUERY_SEC_DESC_REQ *pSMB;
3065 struct kvec iov[1];
3066
3067 cFYI(1, ("GetCifsACL"));
3068
3069 *pbuflen = 0;
3070 *acl_inf = NULL;
3071
3072 rc = smb_init_nttransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
3073 8 /* parm len */, tcon, (void **) &pSMB);
3074 if (rc)
3075 return rc;
3076
3077 pSMB->MaxParameterCount = cpu_to_le32(4);
3078 /* BB TEST with big acls that might need to be e.g. larger than 16K */
3079 pSMB->MaxSetupCount = 0;
3080 pSMB->Fid = fid; /* file handle always le */
3081 pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
3082 CIFS_ACL_DACL);
3083 pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
3084 pSMB->hdr.smb_buf_length += 11;
3085 iov[0].iov_base = (char *)pSMB;
3086 iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
3087
3088 rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
3089 CIFS_STD_OP);
3090 cifs_stats_inc(&tcon->num_acl_get);
3091 if (rc) {
3092 cFYI(1, ("Send error in QuerySecDesc = %d", rc));
3093 } else { /* decode response */
3094 __le32 *parm;
3095 __u32 parm_len;
3096 __u32 acl_len;
3097 struct smb_com_ntransact_rsp *pSMBr;
3098 char *pdata;
3099
3100 /* validate_nttransact */
3101 rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
3102 &pdata, &parm_len, pbuflen);
3103 if (rc)
3104 goto qsec_out;
3105 pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
3106
3107 cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, *acl_inf));
3108
3109 if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
3110 rc = -EIO; /* bad smb */
3111 *pbuflen = 0;
3112 goto qsec_out;
3113 }
3114
3115 /* BB check that data area is minimum length and as big as acl_len */
3116
3117 acl_len = le32_to_cpu(*parm);
3118 if (acl_len != *pbuflen) {
3119 cERROR(1, ("acl length %d does not match %d",
3120 acl_len, *pbuflen));
3121 if (*pbuflen > acl_len)
3122 *pbuflen = acl_len;
3123 }
3124
3125 /* check if buffer is big enough for the acl
3126 header followed by the smallest SID */
3127 if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
3128 (*pbuflen >= 64 * 1024)) {
3129 cERROR(1, ("bad acl length %d", *pbuflen));
3130 rc = -EINVAL;
3131 *pbuflen = 0;
3132 } else {
3133 *acl_inf = kmalloc(*pbuflen, GFP_KERNEL);
3134 if (*acl_inf == NULL) {
3135 *pbuflen = 0;
3136 rc = -ENOMEM;
3137 }
3138 memcpy(*acl_inf, pdata, *pbuflen);
3139 }
3140 }
3141 qsec_out:
3142 if (buf_type == CIFS_SMALL_BUFFER)
3143 cifs_small_buf_release(iov[0].iov_base);
3144 else if (buf_type == CIFS_LARGE_BUFFER)
3145 cifs_buf_release(iov[0].iov_base);
3146 /* cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
3147 return rc;
3148 }
3149
3150 int
3151 CIFSSMBSetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
3152 struct cifs_ntsd *pntsd, __u32 acllen)
3153 {
3154 __u16 byte_count, param_count, data_count, param_offset, data_offset;
3155 int rc = 0;
3156 int bytes_returned = 0;
3157 SET_SEC_DESC_REQ *pSMB = NULL;
3158 NTRANSACT_RSP *pSMBr = NULL;
3159
3160 setCifsAclRetry:
3161 rc = smb_init(SMB_COM_NT_TRANSACT, 19, tcon, (void **) &pSMB,
3162 (void **) &pSMBr);
3163 if (rc)
3164 return (rc);
3165
3166 pSMB->MaxSetupCount = 0;
3167 pSMB->Reserved = 0;
3168
3169 param_count = 8;
3170 param_offset = offsetof(struct smb_com_transaction_ssec_req, Fid) - 4;
3171 data_count = acllen;
3172 data_offset = param_offset + param_count;
3173 byte_count = 3 /* pad */ + param_count;
3174
3175 pSMB->DataCount = cpu_to_le32(data_count);
3176 pSMB->TotalDataCount = pSMB->DataCount;
3177 pSMB->MaxParameterCount = cpu_to_le32(4);
3178 pSMB->MaxDataCount = cpu_to_le32(16384);
3179 pSMB->ParameterCount = cpu_to_le32(param_count);
3180 pSMB->ParameterOffset = cpu_to_le32(param_offset);
3181 pSMB->TotalParameterCount = pSMB->ParameterCount;
3182 pSMB->DataOffset = cpu_to_le32(data_offset);
3183 pSMB->SetupCount = 0;
3184 pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_SET_SECURITY_DESC);
3185 pSMB->ByteCount = cpu_to_le16(byte_count+data_count);
3186
3187 pSMB->Fid = fid; /* file handle always le */
3188 pSMB->Reserved2 = 0;
3189 pSMB->AclFlags = cpu_to_le32(CIFS_ACL_DACL);
3190
3191 if (pntsd && acllen) {
3192 memcpy((char *) &pSMBr->hdr.Protocol + data_offset,
3193 (char *) pntsd,
3194 acllen);
3195 pSMB->hdr.smb_buf_length += (byte_count + data_count);
3196
3197 } else
3198 pSMB->hdr.smb_buf_length += byte_count;
3199
3200 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3201 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3202
3203 cFYI(1, ("SetCIFSACL bytes_returned: %d, rc: %d", bytes_returned, rc));
3204 if (rc)
3205 cFYI(1, ("Set CIFS ACL returned %d", rc));
3206 cifs_buf_release(pSMB);
3207
3208 if (rc == -EAGAIN)
3209 goto setCifsAclRetry;
3210
3211 return (rc);
3212 }
3213
3214 #endif /* CONFIG_CIFS_EXPERIMENTAL */
3215
3216 /* Legacy Query Path Information call for lookup to old servers such
3217 as Win9x/WinME */
3218 int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
3219 const unsigned char *searchName,
3220 FILE_ALL_INFO *pFinfo,
3221 const struct nls_table *nls_codepage, int remap)
3222 {
3223 QUERY_INFORMATION_REQ *pSMB;
3224 QUERY_INFORMATION_RSP *pSMBr;
3225 int rc = 0;
3226 int bytes_returned;
3227 int name_len;
3228
3229 cFYI(1, ("In SMBQPath path %s", searchName));
3230 QInfRetry:
3231 rc = smb_init(SMB_COM_QUERY_INFORMATION, 0, tcon, (void **) &pSMB,
3232 (void **) &pSMBr);
3233 if (rc)
3234 return rc;
3235
3236 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
3237 name_len =
3238 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
3239 PATH_MAX, nls_codepage, remap);
3240 name_len++; /* trailing null */
3241 name_len *= 2;
3242 } else {
3243 name_len = strnlen(searchName, PATH_MAX);
3244 name_len++; /* trailing null */
3245 strncpy(pSMB->FileName, searchName, name_len);
3246 }
3247 pSMB->BufferFormat = 0x04;
3248 name_len++; /* account for buffer type byte */
3249 pSMB->hdr.smb_buf_length += (__u16) name_len;
3250 pSMB->ByteCount = cpu_to_le16(name_len);
3251
3252 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3253 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3254 if (rc) {
3255 cFYI(1, ("Send error in QueryInfo = %d", rc));
3256 } else if (pFinfo) {
3257 struct timespec ts;
3258 __u32 time = le32_to_cpu(pSMBr->last_write_time);
3259
3260 /* decode response */
3261 /* BB FIXME - add time zone adjustment BB */
3262 memset(pFinfo, 0, sizeof(FILE_ALL_INFO));
3263 ts.tv_nsec = 0;
3264 ts.tv_sec = time;
3265 /* decode time fields */
3266 pFinfo->ChangeTime = cpu_to_le64(cifs_UnixTimeToNT(ts));
3267 pFinfo->LastWriteTime = pFinfo->ChangeTime;
3268 pFinfo->LastAccessTime = 0;
3269 pFinfo->AllocationSize =
3270 cpu_to_le64(le32_to_cpu(pSMBr->size));
3271 pFinfo->EndOfFile = pFinfo->AllocationSize;
3272 pFinfo->Attributes =
3273 cpu_to_le32(le16_to_cpu(pSMBr->attr));
3274 } else
3275 rc = -EIO; /* bad buffer passed in */
3276
3277 cifs_buf_release(pSMB);
3278
3279 if (rc == -EAGAIN)
3280 goto QInfRetry;
3281
3282 return rc;
3283 }
3284
3285
3286
3287
3288 int
3289 CIFSSMBQPathInfo(const int xid, struct cifsTconInfo *tcon,
3290 const unsigned char *searchName,
3291 FILE_ALL_INFO *pFindData,
3292 int legacy /* old style infolevel */,
3293 const struct nls_table *nls_codepage, int remap)
3294 {
3295 /* level 263 SMB_QUERY_FILE_ALL_INFO */
3296 TRANSACTION2_QPI_REQ *pSMB = NULL;
3297 TRANSACTION2_QPI_RSP *pSMBr = NULL;
3298 int rc = 0;
3299 int bytes_returned;
3300 int name_len;
3301 __u16 params, byte_count;
3302
3303 /* cFYI(1, ("In QPathInfo path %s", searchName)); */
3304 QPathInfoRetry:
3305 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3306 (void **) &pSMBr);
3307 if (rc)
3308 return rc;
3309
3310 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
3311 name_len =
3312 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
3313 PATH_MAX, nls_codepage, remap);
3314 name_len++; /* trailing null */
3315 name_len *= 2;
3316 } else { /* BB improve the check for buffer overruns BB */
3317 name_len = strnlen(searchName, PATH_MAX);
3318 name_len++; /* trailing null */
3319 strncpy(pSMB->FileName, searchName, name_len);
3320 }
3321
3322 params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
3323 pSMB->TotalDataCount = 0;
3324 pSMB->MaxParameterCount = cpu_to_le16(2);
3325 pSMB->MaxDataCount = cpu_to_le16(4000); /* BB find exact max SMB PDU from sess structure BB */
3326 pSMB->MaxSetupCount = 0;
3327 pSMB->Reserved = 0;
3328 pSMB->Flags = 0;
3329 pSMB->Timeout = 0;
3330 pSMB->Reserved2 = 0;
3331 pSMB->ParameterOffset = cpu_to_le16(offsetof(
3332 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
3333 pSMB->DataCount = 0;
3334 pSMB->DataOffset = 0;
3335 pSMB->SetupCount = 1;
3336 pSMB->Reserved3 = 0;
3337 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
3338 byte_count = params + 1 /* pad */ ;
3339 pSMB->TotalParameterCount = cpu_to_le16(params);
3340 pSMB->ParameterCount = pSMB->TotalParameterCount;
3341 if (legacy)
3342 pSMB->InformationLevel = cpu_to_le16(SMB_INFO_STANDARD);
3343 else
3344 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_ALL_INFO);
3345 pSMB->Reserved4 = 0;
3346 pSMB->hdr.smb_buf_length += byte_count;
3347 pSMB->ByteCount = cpu_to_le16(byte_count);
3348
3349 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3350 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3351 if (rc) {
3352 cFYI(1, ("Send error in QPathInfo = %d", rc));
3353 } else { /* decode response */
3354 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3355
3356 if (rc) /* BB add auto retry on EOPNOTSUPP? */
3357 rc = -EIO;
3358 else if (!legacy && (pSMBr->ByteCount < 40))
3359 rc = -EIO; /* bad smb */
3360 else if (legacy && (pSMBr->ByteCount < 24))
3361 rc = -EIO; /* 24 or 26 expected but we do not read
3362 last field */
3363 else if (pFindData) {
3364 int size;
3365 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3366
3367 /* On legacy responses we do not read the last field,
3368 EAsize, fortunately since it varies by subdialect and
3369 also note it differs on Set vs. Get, ie two bytes or 4
3370 bytes depending but we don't care here */
3371 if (legacy)
3372 size = sizeof(FILE_INFO_STANDARD);
3373 else
3374 size = sizeof(FILE_ALL_INFO);
3375 memcpy((char *) pFindData,
3376 (char *) &pSMBr->hdr.Protocol +
3377 data_offset, size);
3378 } else
3379 rc = -ENOMEM;
3380 }
3381 cifs_buf_release(pSMB);
3382 if (rc == -EAGAIN)
3383 goto QPathInfoRetry;
3384
3385 return rc;
3386 }
3387
3388 int
3389 CIFSSMBUnixQPathInfo(const int xid, struct cifsTconInfo *tcon,
3390 const unsigned char *searchName,
3391 FILE_UNIX_BASIC_INFO * pFindData,
3392 const struct nls_table *nls_codepage, int remap)
3393 {
3394 /* SMB_QUERY_FILE_UNIX_BASIC */
3395 TRANSACTION2_QPI_REQ *pSMB = NULL;
3396 TRANSACTION2_QPI_RSP *pSMBr = NULL;
3397 int rc = 0;
3398 int bytes_returned = 0;
3399 int name_len;
3400 __u16 params, byte_count;
3401
3402 cFYI(1, ("In QPathInfo (Unix) the path %s", searchName));
3403 UnixQPathInfoRetry:
3404 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3405 (void **) &pSMBr);
3406 if (rc)
3407 return rc;
3408
3409 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
3410 name_len =
3411 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
3412 PATH_MAX, nls_codepage, remap);
3413 name_len++; /* trailing null */
3414 name_len *= 2;
3415 } else { /* BB improve the check for buffer overruns BB */
3416 name_len = strnlen(searchName, PATH_MAX);
3417 name_len++; /* trailing null */
3418 strncpy(pSMB->FileName, searchName, name_len);
3419 }
3420
3421 params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
3422 pSMB->TotalDataCount = 0;
3423 pSMB->MaxParameterCount = cpu_to_le16(2);
3424 /* BB find exact max SMB PDU from sess structure BB */
3425 pSMB->MaxDataCount = cpu_to_le16(4000);
3426 pSMB->MaxSetupCount = 0;
3427 pSMB->Reserved = 0;
3428 pSMB->Flags = 0;
3429 pSMB->Timeout = 0;
3430 pSMB->Reserved2 = 0;
3431 pSMB->ParameterOffset = cpu_to_le16(offsetof(
3432 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
3433 pSMB->DataCount = 0;
3434 pSMB->DataOffset = 0;
3435 pSMB->SetupCount = 1;
3436 pSMB->Reserved3 = 0;
3437 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
3438 byte_count = params + 1 /* pad */ ;
3439 pSMB->TotalParameterCount = cpu_to_le16(params);
3440 pSMB->ParameterCount = pSMB->TotalParameterCount;
3441 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
3442 pSMB->Reserved4 = 0;
3443 pSMB->hdr.smb_buf_length += byte_count;
3444 pSMB->ByteCount = cpu_to_le16(byte_count);
3445
3446 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3447 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3448 if (rc) {
3449 cFYI(1, ("Send error in QPathInfo = %d", rc));
3450 } else { /* decode response */
3451 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3452
3453 if (rc || (pSMBr->ByteCount < sizeof(FILE_UNIX_BASIC_INFO))) {
3454 cERROR(1, ("Malformed FILE_UNIX_BASIC_INFO response.\n"
3455 "Unix Extensions can be disabled on mount "
3456 "by specifying the nosfu mount option."));
3457 rc = -EIO; /* bad smb */
3458 } else {
3459 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3460 memcpy((char *) pFindData,
3461 (char *) &pSMBr->hdr.Protocol +
3462 data_offset,
3463 sizeof(FILE_UNIX_BASIC_INFO));
3464 }
3465 }
3466 cifs_buf_release(pSMB);
3467 if (rc == -EAGAIN)
3468 goto UnixQPathInfoRetry;
3469
3470 return rc;
3471 }
3472
3473 /* xid, tcon, searchName and codepage are input parms, rest are returned */
3474 int
3475 CIFSFindFirst(const int xid, struct cifsTconInfo *tcon,
3476 const char *searchName,
3477 const struct nls_table *nls_codepage,
3478 __u16 *pnetfid,
3479 struct cifs_search_info *psrch_inf, int remap, const char dirsep)
3480 {
3481 /* level 257 SMB_ */
3482 TRANSACTION2_FFIRST_REQ *pSMB = NULL;
3483 TRANSACTION2_FFIRST_RSP *pSMBr = NULL;
3484 T2_FFIRST_RSP_PARMS *parms;
3485 int rc = 0;
3486 int bytes_returned = 0;
3487 int name_len;
3488 __u16 params, byte_count;
3489
3490 cFYI(1, ("In FindFirst for %s", searchName));
3491
3492 findFirstRetry:
3493 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3494 (void **) &pSMBr);
3495 if (rc)
3496 return rc;
3497
3498 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
3499 name_len =
3500 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
3501 PATH_MAX, nls_codepage, remap);
3502 /* We can not add the asterik earlier in case
3503 it got remapped to 0xF03A as if it were part of the
3504 directory name instead of a wildcard */
3505 name_len *= 2;
3506 pSMB->FileName[name_len] = dirsep;
3507 pSMB->FileName[name_len+1] = 0;
3508 pSMB->FileName[name_len+2] = '*';
3509 pSMB->FileName[name_len+3] = 0;
3510 name_len += 4; /* now the trailing null */
3511 pSMB->FileName[name_len] = 0; /* null terminate just in case */
3512 pSMB->FileName[name_len+1] = 0;
3513 name_len += 2;
3514 } else { /* BB add check for overrun of SMB buf BB */
3515 name_len = strnlen(searchName, PATH_MAX);
3516 /* BB fix here and in unicode clause above ie
3517 if (name_len > buffersize-header)
3518 free buffer exit; BB */
3519 strncpy(pSMB->FileName, searchName, name_len);
3520 pSMB->FileName[name_len] = dirsep;
3521 pSMB->FileName[name_len+1] = '*';
3522 pSMB->FileName[name_len+2] = 0;
3523 name_len += 3;
3524 }
3525
3526 params = 12 + name_len /* includes null */ ;
3527 pSMB->TotalDataCount = 0; /* no EAs */
3528 pSMB->MaxParameterCount = cpu_to_le16(10);
3529 pSMB->MaxDataCount = cpu_to_le16((tcon->ses->server->maxBuf -
3530 MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
3531 pSMB->MaxSetupCount = 0;
3532 pSMB->Reserved = 0;
3533 pSMB->Flags = 0;
3534 pSMB->Timeout = 0;
3535 pSMB->Reserved2 = 0;
3536 byte_count = params + 1 /* pad */ ;
3537 pSMB->TotalParameterCount = cpu_to_le16(params);
3538 pSMB->ParameterCount = pSMB->TotalParameterCount;
3539 pSMB->ParameterOffset = cpu_to_le16(
3540 offsetof(struct smb_com_transaction2_ffirst_req, SearchAttributes)
3541 - 4);
3542 pSMB->DataCount = 0;
3543 pSMB->DataOffset = 0;
3544 pSMB->SetupCount = 1; /* one byte, no need to make endian neutral */
3545 pSMB->Reserved3 = 0;
3546 pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_FIRST);
3547 pSMB->SearchAttributes =
3548 cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
3549 ATTR_DIRECTORY);
3550 pSMB->SearchCount = cpu_to_le16(CIFSMaxBufSize/sizeof(FILE_UNIX_INFO));
3551 pSMB->SearchFlags = cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END |
3552 CIFS_SEARCH_RETURN_RESUME);
3553 pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
3554
3555 /* BB what should we set StorageType to? Does it matter? BB */
3556 pSMB->SearchStorageType = 0;
3557 pSMB->hdr.smb_buf_length += byte_count;
3558 pSMB->ByteCount = cpu_to_le16(byte_count);
3559
3560 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3561 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3562 cifs_stats_inc(&tcon->num_ffirst);
3563
3564 if (rc) {/* BB add logic to retry regular search if Unix search
3565 rejected unexpectedly by server */
3566 /* BB Add code to handle unsupported level rc */
3567 cFYI(1, ("Error in FindFirst = %d", rc));
3568
3569 cifs_buf_release(pSMB);
3570
3571 /* BB eventually could optimize out free and realloc of buf */
3572 /* for this case */
3573 if (rc == -EAGAIN)
3574 goto findFirstRetry;
3575 } else { /* decode response */
3576 /* BB remember to free buffer if error BB */
3577 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3578 if (rc == 0) {
3579 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
3580 psrch_inf->unicode = TRUE;
3581 else
3582 psrch_inf->unicode = FALSE;
3583
3584 psrch_inf->ntwrk_buf_start = (char *)pSMBr;
3585 psrch_inf->smallBuf = 0;
3586 psrch_inf->srch_entries_start =
3587 (char *) &pSMBr->hdr.Protocol +
3588 le16_to_cpu(pSMBr->t2.DataOffset);
3589 parms = (T2_FFIRST_RSP_PARMS *)((char *) &pSMBr->hdr.Protocol +
3590 le16_to_cpu(pSMBr->t2.ParameterOffset));
3591
3592 if (parms->EndofSearch)
3593 psrch_inf->endOfSearch = TRUE;
3594 else
3595 psrch_inf->endOfSearch = FALSE;
3596
3597 psrch_inf->entries_in_buffer =
3598 le16_to_cpu(parms->SearchCount);
3599 psrch_inf->index_of_last_entry = 2 /* skip . and .. */ +
3600 psrch_inf->entries_in_buffer;
3601 *pnetfid = parms->SearchHandle;
3602 } else {
3603 cifs_buf_release(pSMB);
3604 }
3605 }
3606
3607 return rc;
3608 }
3609
3610 int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
3611 __u16 searchHandle, struct cifs_search_info *psrch_inf)
3612 {
3613 TRANSACTION2_FNEXT_REQ *pSMB = NULL;
3614 TRANSACTION2_FNEXT_RSP *pSMBr = NULL;
3615 T2_FNEXT_RSP_PARMS *parms;
3616 char *response_data;
3617 int rc = 0;
3618 int bytes_returned, name_len;
3619 __u16 params, byte_count;
3620
3621 cFYI(1, ("In FindNext"));
3622
3623 if (psrch_inf->endOfSearch == TRUE)
3624 return -ENOENT;
3625
3626 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3627 (void **) &pSMBr);
3628 if (rc)
3629 return rc;
3630
3631 params = 14; /* includes 2 bytes of null string, converted to LE below*/
3632 byte_count = 0;
3633 pSMB->TotalDataCount = 0; /* no EAs */
3634 pSMB->MaxParameterCount = cpu_to_le16(8);
3635 pSMB->MaxDataCount =
3636 cpu_to_le16((tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) &
3637 0xFFFFFF00);
3638 pSMB->MaxSetupCount = 0;
3639 pSMB->Reserved = 0;
3640 pSMB->Flags = 0;
3641 pSMB->Timeout = 0;
3642 pSMB->Reserved2 = 0;
3643 pSMB->ParameterOffset = cpu_to_le16(
3644 offsetof(struct smb_com_transaction2_fnext_req,SearchHandle) - 4);
3645 pSMB->DataCount = 0;
3646 pSMB->DataOffset = 0;
3647 pSMB->SetupCount = 1;
3648 pSMB->Reserved3 = 0;
3649 pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
3650 pSMB->SearchHandle = searchHandle; /* always kept as le */
3651 pSMB->SearchCount =
3652 cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
3653 pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
3654 pSMB->ResumeKey = psrch_inf->resume_key;
3655 pSMB->SearchFlags =
3656 cpu_to_le16(CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME);
3657
3658 name_len = psrch_inf->resume_name_len;
3659 params += name_len;
3660 if (name_len < PATH_MAX) {
3661 memcpy(pSMB->ResumeFileName, psrch_inf->presume_name, name_len);
3662 byte_count += name_len;
3663 /* 14 byte parm len above enough for 2 byte null terminator */
3664 pSMB->ResumeFileName[name_len] = 0;
3665 pSMB->ResumeFileName[name_len+1] = 0;
3666 } else {
3667 rc = -EINVAL;
3668 goto FNext2_err_exit;
3669 }
3670 byte_count = params + 1 /* pad */ ;
3671 pSMB->TotalParameterCount = cpu_to_le16(params);
3672 pSMB->ParameterCount = pSMB->TotalParameterCount;
3673 pSMB->hdr.smb_buf_length += byte_count;
3674 pSMB->ByteCount = cpu_to_le16(byte_count);
3675
3676 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3677 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3678 cifs_stats_inc(&tcon->num_fnext);
3679 if (rc) {
3680 if (rc == -EBADF) {
3681 psrch_inf->endOfSearch = TRUE;
3682 rc = 0; /* search probably was closed at end of search*/
3683 } else
3684 cFYI(1, ("FindNext returned = %d", rc));
3685 } else { /* decode response */
3686 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3687
3688 if (rc == 0) {
3689 /* BB fixme add lock for file (srch_info) struct here */
3690 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
3691 psrch_inf->unicode = TRUE;
3692 else
3693 psrch_inf->unicode = FALSE;
3694 response_data = (char *) &pSMBr->hdr.Protocol +
3695 le16_to_cpu(pSMBr->t2.ParameterOffset);
3696 parms = (T2_FNEXT_RSP_PARMS *)response_data;
3697 response_data = (char *)&pSMBr->hdr.Protocol +
3698 le16_to_cpu(pSMBr->t2.DataOffset);
3699 if (psrch_inf->smallBuf)
3700 cifs_small_buf_release(
3701 psrch_inf->ntwrk_buf_start);
3702 else
3703 cifs_buf_release(psrch_inf->ntwrk_buf_start);
3704 psrch_inf->srch_entries_start = response_data;
3705 psrch_inf->ntwrk_buf_start = (char *)pSMB;
3706 psrch_inf->smallBuf = 0;
3707 if (parms->EndofSearch)
3708 psrch_inf->endOfSearch = TRUE;
3709 else
3710 psrch_inf->endOfSearch = FALSE;
3711 psrch_inf->entries_in_buffer =
3712 le16_to_cpu(parms->SearchCount);
3713 psrch_inf->index_of_last_entry +=
3714 psrch_inf->entries_in_buffer;
3715 /* cFYI(1,("fnxt2 entries in buf %d index_of_last %d",
3716 psrch_inf->entries_in_buffer, psrch_inf->index_of_last_entry)); */
3717
3718 /* BB fixme add unlock here */
3719 }
3720
3721 }
3722
3723 /* BB On error, should we leave previous search buf (and count and
3724 last entry fields) intact or free the previous one? */
3725
3726 /* Note: On -EAGAIN error only caller can retry on handle based calls
3727 since file handle passed in no longer valid */
3728 FNext2_err_exit:
3729 if (rc != 0)
3730 cifs_buf_release(pSMB);
3731 return rc;
3732 }
3733
3734 int
3735 CIFSFindClose(const int xid, struct cifsTconInfo *tcon,
3736 const __u16 searchHandle)
3737 {
3738 int rc = 0;
3739 FINDCLOSE_REQ *pSMB = NULL;
3740
3741 cFYI(1, ("In CIFSSMBFindClose"));
3742 rc = small_smb_init(SMB_COM_FIND_CLOSE2, 1, tcon, (void **)&pSMB);
3743
3744 /* no sense returning error if session restarted
3745 as file handle has been closed */
3746 if (rc == -EAGAIN)
3747 return 0;
3748 if (rc)
3749 return rc;
3750
3751 pSMB->FileID = searchHandle;
3752 pSMB->ByteCount = 0;
3753 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
3754 if (rc)
3755 cERROR(1, ("Send error in FindClose = %d", rc));
3756
3757 cifs_stats_inc(&tcon->num_fclose);
3758
3759 /* Since session is dead, search handle closed on server already */
3760 if (rc == -EAGAIN)
3761 rc = 0;
3762
3763 return rc;
3764 }
3765
3766 int
3767 CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
3768 const unsigned char *searchName,
3769 __u64 *inode_number,
3770 const struct nls_table *nls_codepage, int remap)
3771 {
3772 int rc = 0;
3773 TRANSACTION2_QPI_REQ *pSMB = NULL;
3774 TRANSACTION2_QPI_RSP *pSMBr = NULL;
3775 int name_len, bytes_returned;
3776 __u16 params, byte_count;
3777
3778 cFYI(1, ("In GetSrvInodeNum for %s", searchName));
3779 if (tcon == NULL)
3780 return -ENODEV;
3781
3782 GetInodeNumberRetry:
3783 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3784 (void **) &pSMBr);
3785 if (rc)
3786 return rc;
3787
3788 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
3789 name_len =
3790 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
3791 PATH_MAX, nls_codepage, remap);
3792 name_len++; /* trailing null */
3793 name_len *= 2;
3794 } else { /* BB improve the check for buffer overruns BB */
3795 name_len = strnlen(searchName, PATH_MAX);
3796 name_len++; /* trailing null */
3797 strncpy(pSMB->FileName, searchName, name_len);
3798 }
3799
3800 params = 2 /* level */ + 4 /* rsrvd */ + name_len /* incl null */ ;
3801 pSMB->TotalDataCount = 0;
3802 pSMB->MaxParameterCount = cpu_to_le16(2);
3803 /* BB find exact max data count below from sess structure BB */
3804 pSMB->MaxDataCount = cpu_to_le16(4000);
3805 pSMB->MaxSetupCount = 0;
3806 pSMB->Reserved = 0;
3807 pSMB->Flags = 0;
3808 pSMB->Timeout = 0;
3809 pSMB->Reserved2 = 0;
3810 pSMB->ParameterOffset = cpu_to_le16(offsetof(
3811 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
3812 pSMB->DataCount = 0;
3813 pSMB->DataOffset = 0;
3814 pSMB->SetupCount = 1;
3815 pSMB->Reserved3 = 0;
3816 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
3817 byte_count = params + 1 /* pad */ ;
3818 pSMB->TotalParameterCount = cpu_to_le16(params);
3819 pSMB->ParameterCount = pSMB->TotalParameterCount;
3820 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_INTERNAL_INFO);
3821 pSMB->Reserved4 = 0;
3822 pSMB->hdr.smb_buf_length += byte_count;
3823 pSMB->ByteCount = cpu_to_le16(byte_count);
3824
3825 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3826 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3827 if (rc) {
3828 cFYI(1, ("error %d in QueryInternalInfo", rc));
3829 } else {
3830 /* decode response */
3831 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3832 if (rc || (pSMBr->ByteCount < 2))
3833 /* BB also check enough total bytes returned */
3834 /* If rc should we check for EOPNOSUPP and
3835 disable the srvino flag? or in caller? */
3836 rc = -EIO; /* bad smb */
3837 else {
3838 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3839 __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
3840 struct file_internal_info *pfinfo;
3841 /* BB Do we need a cast or hash here ? */
3842 if (count < 8) {
3843 cFYI(1, ("Illegal size ret in QryIntrnlInf"));
3844 rc = -EIO;
3845 goto GetInodeNumOut;
3846 }
3847 pfinfo = (struct file_internal_info *)
3848 (data_offset + (char *) &pSMBr->hdr.Protocol);
3849 *inode_number = pfinfo->UniqueId;
3850 }
3851 }
3852 GetInodeNumOut:
3853 cifs_buf_release(pSMB);
3854 if (rc == -EAGAIN)
3855 goto GetInodeNumberRetry;
3856 return rc;
3857 }
3858
3859 int
3860 CIFSGetDFSRefer(const int xid, struct cifsSesInfo *ses,
3861 const unsigned char *searchName,
3862 unsigned char **targetUNCs,
3863 unsigned int *number_of_UNC_in_array,
3864 const struct nls_table *nls_codepage, int remap)
3865 {
3866 /* TRANS2_GET_DFS_REFERRAL */
3867 TRANSACTION2_GET_DFS_REFER_REQ *pSMB = NULL;
3868 TRANSACTION2_GET_DFS_REFER_RSP *pSMBr = NULL;
3869 struct dfs_referral_level_3 *referrals = NULL;
3870 int rc = 0;
3871 int bytes_returned;
3872 int name_len;
3873 unsigned int i;
3874 char *temp;
3875 __u16 params, byte_count;
3876 *number_of_UNC_in_array = 0;
3877 *targetUNCs = NULL;
3878
3879 cFYI(1, ("In GetDFSRefer the path %s", searchName));
3880 if (ses == NULL)
3881 return -ENODEV;
3882 getDFSRetry:
3883 rc = smb_init(SMB_COM_TRANSACTION2, 15, NULL, (void **) &pSMB,
3884 (void **) &pSMBr);
3885 if (rc)
3886 return rc;
3887
3888 /* server pointer checked in called function,
3889 but should never be null here anyway */
3890 pSMB->hdr.Mid = GetNextMid(ses->server);
3891 pSMB->hdr.Tid = ses->ipc_tid;
3892 pSMB->hdr.Uid = ses->Suid;
3893 if (ses->capabilities & CAP_STATUS32)
3894 pSMB->hdr.Flags2 |= SMBFLG2_ERR_STATUS;
3895 if (ses->capabilities & CAP_DFS)
3896 pSMB->hdr.Flags2 |= SMBFLG2_DFS;
3897
3898 if (ses->capabilities & CAP_UNICODE) {
3899 pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
3900 name_len =
3901 cifsConvertToUCS((__le16 *) pSMB->RequestFileName,
3902 searchName, PATH_MAX, nls_codepage, remap);
3903 name_len++; /* trailing null */
3904 name_len *= 2;
3905 } else { /* BB improve the check for buffer overruns BB */
3906 name_len = strnlen(searchName, PATH_MAX);
3907 name_len++; /* trailing null */
3908 strncpy(pSMB->RequestFileName, searchName, name_len);
3909 }
3910
3911 if (ses->server) {
3912 if (ses->server->secMode &
3913 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3914 pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3915 }
3916
3917 pSMB->hdr.Uid = ses->Suid;
3918
3919 params = 2 /* level */ + name_len /*includes null */ ;
3920 pSMB->TotalDataCount = 0;
3921 pSMB->DataCount = 0;
3922 pSMB->DataOffset = 0;
3923 pSMB->MaxParameterCount = 0;
3924 pSMB->MaxDataCount = cpu_to_le16(4000); /* BB find exact max SMB PDU from sess structure BB */
3925 pSMB->MaxSetupCount = 0;
3926 pSMB->Reserved = 0;
3927 pSMB->Flags = 0;
3928 pSMB->Timeout = 0;
3929 pSMB->Reserved2 = 0;
3930 pSMB->ParameterOffset = cpu_to_le16(offsetof(
3931 struct smb_com_transaction2_get_dfs_refer_req, MaxReferralLevel) - 4);
3932 pSMB->SetupCount = 1;
3933 pSMB->Reserved3 = 0;
3934 pSMB->SubCommand = cpu_to_le16(TRANS2_GET_DFS_REFERRAL);
3935 byte_count = params + 3 /* pad */ ;
3936 pSMB->ParameterCount = cpu_to_le16(params);
3937 pSMB->TotalParameterCount = pSMB->ParameterCount;
3938 pSMB->MaxReferralLevel = cpu_to_le16(3);
3939 pSMB->hdr.smb_buf_length += byte_count;
3940 pSMB->ByteCount = cpu_to_le16(byte_count);
3941
3942 rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
3943 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3944 if (rc) {
3945 cFYI(1, ("Send error in GetDFSRefer = %d", rc));
3946 } else { /* decode response */
3947 /* BB Add logic to parse referrals here */
3948 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3949
3950 /* BB Also check if enough total bytes returned? */
3951 if (rc || (pSMBr->ByteCount < 17))
3952 rc = -EIO; /* bad smb */
3953 else {
3954 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3955 __u16 data_count = le16_to_cpu(pSMBr->t2.DataCount);
3956
3957 cFYI(1,
3958 ("Decoding GetDFSRefer response BCC: %d Offset %d",
3959 pSMBr->ByteCount, data_offset));
3960 referrals =
3961 (struct dfs_referral_level_3 *)
3962 (8 /* sizeof start of data block */ +
3963 data_offset +
3964 (char *) &pSMBr->hdr.Protocol);
3965 cFYI(1, ("num_referrals: %d dfs flags: 0x%x ... \n"
3966 "for referral one refer size: 0x%x srv "
3967 "type: 0x%x refer flags: 0x%x ttl: 0x%x",
3968 le16_to_cpu(pSMBr->NumberOfReferrals),
3969 le16_to_cpu(pSMBr->DFSFlags),
3970 le16_to_cpu(referrals->ReferralSize),
3971 le16_to_cpu(referrals->ServerType),
3972 le16_to_cpu(referrals->ReferralFlags),
3973 le16_to_cpu(referrals->TimeToLive)));
3974 /* BB This field is actually two bytes in from start of
3975 data block so we could do safety check that DataBlock
3976 begins at address of pSMBr->NumberOfReferrals */
3977 *number_of_UNC_in_array =
3978 le16_to_cpu(pSMBr->NumberOfReferrals);
3979
3980 /* BB Fix below so can return more than one referral */
3981 if (*number_of_UNC_in_array > 1)
3982 *number_of_UNC_in_array = 1;
3983
3984 /* get the length of the strings describing refs */
3985 name_len = 0;
3986 for (i = 0; i < *number_of_UNC_in_array; i++) {
3987 /* make sure that DfsPathOffset not past end */
3988 __u16 offset =
3989 le16_to_cpu(referrals->DfsPathOffset);
3990 if (offset > data_count) {
3991 /* if invalid referral, stop here and do
3992 not try to copy any more */
3993 *number_of_UNC_in_array = i;
3994 break;
3995 }
3996 temp = ((char *)referrals) + offset;
3997
3998 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
3999 name_len += UniStrnlen((wchar_t *)temp,
4000 data_count);
4001 } else {
4002 name_len += strnlen(temp, data_count);
4003 }
4004 referrals++;
4005 /* BB add check that referral pointer does
4006 not fall off end PDU */
4007 }
4008 /* BB add check for name_len bigger than bcc */
4009 *targetUNCs =
4010 kmalloc(name_len+1+(*number_of_UNC_in_array),
4011 GFP_KERNEL);
4012 if (*targetUNCs == NULL) {
4013 rc = -ENOMEM;
4014 goto GetDFSRefExit;
4015 }
4016 /* copy the ref strings */
4017 referrals = (struct dfs_referral_level_3 *)
4018 (8 /* sizeof data hdr */ + data_offset +
4019 (char *) &pSMBr->hdr.Protocol);
4020
4021 for (i = 0; i < *number_of_UNC_in_array; i++) {
4022 temp = ((char *)referrals) +
4023 le16_to_cpu(referrals->DfsPathOffset);
4024 if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
4025 cifs_strfromUCS_le(*targetUNCs,
4026 (__le16 *) temp,
4027 name_len,
4028 nls_codepage);
4029 } else {
4030 strncpy(*targetUNCs, temp, name_len);
4031 }
4032 /* BB update target_uncs pointers */
4033 referrals++;
4034 }
4035 temp = *targetUNCs;
4036 temp[name_len] = 0;
4037 }
4038
4039 }
4040 GetDFSRefExit:
4041 if (pSMB)
4042 cifs_buf_release(pSMB);
4043
4044 if (rc == -EAGAIN)
4045 goto getDFSRetry;
4046
4047 return rc;
4048 }
4049
4050 /* Query File System Info such as free space to old servers such as Win 9x */
4051 int
4052 SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData)
4053 {
4054 /* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */
4055 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4056 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4057 FILE_SYSTEM_ALLOC_INFO *response_data;
4058 int rc = 0;
4059 int bytes_returned = 0;
4060 __u16 params, byte_count;
4061
4062 cFYI(1, ("OldQFSInfo"));
4063 oldQFSInfoRetry:
4064 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4065 (void **) &pSMBr);
4066 if (rc)
4067 return rc;
4068
4069 params = 2; /* level */
4070 pSMB->TotalDataCount = 0;
4071 pSMB->MaxParameterCount = cpu_to_le16(2);
4072 pSMB->MaxDataCount = cpu_to_le16(1000);
4073 pSMB->MaxSetupCount = 0;
4074 pSMB->Reserved = 0;
4075 pSMB->Flags = 0;
4076 pSMB->Timeout = 0;
4077 pSMB->Reserved2 = 0;
4078 byte_count = params + 1 /* pad */ ;
4079 pSMB->TotalParameterCount = cpu_to_le16(params);
4080 pSMB->ParameterCount = pSMB->TotalParameterCount;
4081 pSMB->ParameterOffset = cpu_to_le16(offsetof(
4082 struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4083 pSMB->DataCount = 0;
4084 pSMB->DataOffset = 0;
4085 pSMB->SetupCount = 1;
4086 pSMB->Reserved3 = 0;
4087 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4088 pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION);
4089 pSMB->hdr.smb_buf_length += byte_count;
4090 pSMB->ByteCount = cpu_to_le16(byte_count);
4091
4092 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4093 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4094 if (rc) {
4095 cFYI(1, ("Send error in QFSInfo = %d", rc));
4096 } else { /* decode response */
4097 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4098
4099 if (rc || (pSMBr->ByteCount < 18))
4100 rc = -EIO; /* bad smb */
4101 else {
4102 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4103 cFYI(1, ("qfsinf resp BCC: %d Offset %d",
4104 pSMBr->ByteCount, data_offset));
4105
4106 response_data = (FILE_SYSTEM_ALLOC_INFO *)
4107 (((char *) &pSMBr->hdr.Protocol) + data_offset);
4108 FSData->f_bsize =
4109 le16_to_cpu(response_data->BytesPerSector) *
4110 le32_to_cpu(response_data->
4111 SectorsPerAllocationUnit);
4112 FSData->f_blocks =
4113 le32_to_cpu(response_data->TotalAllocationUnits);
4114 FSData->f_bfree = FSData->f_bavail =
4115 le32_to_cpu(response_data->FreeAllocationUnits);
4116 cFYI(1,
4117 ("Blocks: %lld Free: %lld Block size %ld",
4118 (unsigned long long)FSData->f_blocks,
4119 (unsigned long long)FSData->f_bfree,
4120 FSData->f_bsize));
4121 }
4122 }
4123 cifs_buf_release(pSMB);
4124
4125 if (rc == -EAGAIN)
4126 goto oldQFSInfoRetry;
4127
4128 return rc;
4129 }
4130
4131 int
4132 CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData)
4133 {
4134 /* level 0x103 SMB_QUERY_FILE_SYSTEM_INFO */
4135 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4136 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4137 FILE_SYSTEM_INFO *response_data;
4138 int rc = 0;
4139 int bytes_returned = 0;
4140 __u16 params, byte_count;
4141
4142 cFYI(1, ("In QFSInfo"));
4143 QFSInfoRetry:
4144 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4145 (void **) &pSMBr);
4146 if (rc)
4147 return rc;
4148
4149 params = 2; /* level */
4150 pSMB->TotalDataCount = 0;
4151 pSMB->MaxParameterCount = cpu_to_le16(2);
4152 pSMB->MaxDataCount = cpu_to_le16(1000);
4153 pSMB->MaxSetupCount = 0;
4154 pSMB->Reserved = 0;
4155 pSMB->Flags = 0;
4156 pSMB->Timeout = 0;
4157 pSMB->Reserved2 = 0;
4158 byte_count = params + 1 /* pad */ ;
4159 pSMB->TotalParameterCount = cpu_to_le16(params);
4160 pSMB->ParameterCount = pSMB->TotalParameterCount;
4161 pSMB->ParameterOffset = cpu_to_le16(offsetof(
4162 struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4163 pSMB->DataCount = 0;
4164 pSMB->DataOffset = 0;
4165 pSMB->SetupCount = 1;
4166 pSMB->Reserved3 = 0;
4167 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4168 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_SIZE_INFO);
4169 pSMB->hdr.smb_buf_length += byte_count;
4170 pSMB->ByteCount = cpu_to_le16(byte_count);
4171
4172 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4173 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4174 if (rc) {
4175 cFYI(1, ("Send error in QFSInfo = %d", rc));
4176 } else { /* decode response */
4177 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4178
4179 if (rc || (pSMBr->ByteCount < 24))
4180 rc = -EIO; /* bad smb */
4181 else {
4182 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4183
4184 response_data =
4185 (FILE_SYSTEM_INFO
4186 *) (((char *) &pSMBr->hdr.Protocol) +
4187 data_offset);
4188 FSData->f_bsize =
4189 le32_to_cpu(response_data->BytesPerSector) *
4190 le32_to_cpu(response_data->
4191 SectorsPerAllocationUnit);
4192 FSData->f_blocks =
4193 le64_to_cpu(response_data->TotalAllocationUnits);
4194 FSData->f_bfree = FSData->f_bavail =
4195 le64_to_cpu(response_data->FreeAllocationUnits);
4196 cFYI(1,
4197 ("Blocks: %lld Free: %lld Block size %ld",
4198 (unsigned long long)FSData->f_blocks,
4199 (unsigned long long)FSData->f_bfree,
4200 FSData->f_bsize));
4201 }
4202 }
4203 cifs_buf_release(pSMB);
4204
4205 if (rc == -EAGAIN)
4206 goto QFSInfoRetry;
4207
4208 return rc;
4209 }
4210
4211 int
4212 CIFSSMBQFSAttributeInfo(const int xid, struct cifsTconInfo *tcon)
4213 {
4214 /* level 0x105 SMB_QUERY_FILE_SYSTEM_INFO */
4215 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4216 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4217 FILE_SYSTEM_ATTRIBUTE_INFO *response_data;
4218 int rc = 0;
4219 int bytes_returned = 0;
4220 __u16 params, byte_count;
4221
4222 cFYI(1, ("In QFSAttributeInfo"));
4223 QFSAttributeRetry:
4224 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4225 (void **) &pSMBr);
4226 if (rc)
4227 return rc;
4228
4229 params = 2; /* level */
4230 pSMB->TotalDataCount = 0;
4231 pSMB->MaxParameterCount = cpu_to_le16(2);
4232 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */
4233 pSMB->MaxSetupCount = 0;
4234 pSMB->Reserved = 0;
4235 pSMB->Flags = 0;
4236 pSMB->Timeout = 0;
4237 pSMB->Reserved2 = 0;
4238 byte_count = params + 1 /* pad */ ;
4239 pSMB->TotalParameterCount = cpu_to_le16(params);
4240 pSMB->ParameterCount = pSMB->TotalParameterCount;
4241 pSMB->ParameterOffset = cpu_to_le16(offsetof(
4242 struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4243 pSMB->DataCount = 0;
4244 pSMB->DataOffset = 0;
4245 pSMB->SetupCount = 1;
4246 pSMB->Reserved3 = 0;
4247 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4248 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_ATTRIBUTE_INFO);
4249 pSMB->hdr.smb_buf_length += byte_count;
4250 pSMB->ByteCount = cpu_to_le16(byte_count);
4251
4252 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4253 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4254 if (rc) {
4255 cERROR(1, ("Send error in QFSAttributeInfo = %d", rc));
4256 } else { /* decode response */
4257 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4258
4259 if (rc || (pSMBr->ByteCount < 13)) {
4260 /* BB also check if enough bytes returned */
4261 rc = -EIO; /* bad smb */
4262 } else {
4263 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4264 response_data =
4265 (FILE_SYSTEM_ATTRIBUTE_INFO
4266 *) (((char *) &pSMBr->hdr.Protocol) +
4267 data_offset);
4268 memcpy(&tcon->fsAttrInfo, response_data,
4269 sizeof(FILE_SYSTEM_ATTRIBUTE_INFO));
4270 }
4271 }
4272 cifs_buf_release(pSMB);
4273
4274 if (rc == -EAGAIN)
4275 goto QFSAttributeRetry;
4276
4277 return rc;
4278 }
4279
4280 int
4281 CIFSSMBQFSDeviceInfo(const int xid, struct cifsTconInfo *tcon)
4282 {
4283 /* level 0x104 SMB_QUERY_FILE_SYSTEM_INFO */
4284 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4285 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4286 FILE_SYSTEM_DEVICE_INFO *response_data;
4287 int rc = 0;
4288 int bytes_returned = 0;
4289 __u16 params, byte_count;
4290
4291 cFYI(1, ("In QFSDeviceInfo"));
4292 QFSDeviceRetry:
4293 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4294 (void **) &pSMBr);
4295 if (rc)
4296 return rc;
4297
4298 params = 2; /* level */
4299 pSMB->TotalDataCount = 0;
4300 pSMB->MaxParameterCount = cpu_to_le16(2);
4301 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */
4302 pSMB->MaxSetupCount = 0;
4303 pSMB->Reserved = 0;
4304 pSMB->Flags = 0;
4305 pSMB->Timeout = 0;
4306 pSMB->Reserved2 = 0;
4307 byte_count = params + 1 /* pad */ ;
4308 pSMB->TotalParameterCount = cpu_to_le16(params);
4309 pSMB->ParameterCount = pSMB->TotalParameterCount;
4310 pSMB->ParameterOffset = cpu_to_le16(offsetof(
4311 struct smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4312
4313 pSMB->DataCount = 0;
4314 pSMB->DataOffset = 0;
4315 pSMB->SetupCount = 1;
4316 pSMB->Reserved3 = 0;
4317 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4318 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FS_DEVICE_INFO);
4319 pSMB->hdr.smb_buf_length += byte_count;
4320 pSMB->ByteCount = cpu_to_le16(byte_count);
4321
4322 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4323 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4324 if (rc) {
4325 cFYI(1, ("Send error in QFSDeviceInfo = %d", rc));
4326 } else { /* decode response */
4327 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4328
4329 if (rc || (pSMBr->ByteCount < sizeof(FILE_SYSTEM_DEVICE_INFO)))
4330 rc = -EIO; /* bad smb */
4331 else {
4332 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4333 response_data =
4334 (FILE_SYSTEM_DEVICE_INFO *)
4335 (((char *) &pSMBr->hdr.Protocol) +
4336 data_offset);
4337 memcpy(&tcon->fsDevInfo, response_data,
4338 sizeof(FILE_SYSTEM_DEVICE_INFO));
4339 }
4340 }
4341 cifs_buf_release(pSMB);
4342
4343 if (rc == -EAGAIN)
4344 goto QFSDeviceRetry;
4345
4346 return rc;
4347 }
4348
4349 int
4350 CIFSSMBQFSUnixInfo(const int xid, struct cifsTconInfo *tcon)
4351 {
4352 /* level 0x200 SMB_QUERY_CIFS_UNIX_INFO */
4353 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4354 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4355 FILE_SYSTEM_UNIX_INFO *response_data;
4356 int rc = 0;
4357 int bytes_returned = 0;
4358 __u16 params, byte_count;
4359
4360 cFYI(1, ("In QFSUnixInfo"));
4361 QFSUnixRetry:
4362 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4363 (void **) &pSMBr);
4364 if (rc)
4365 return rc;
4366
4367 params = 2; /* level */
4368 pSMB->TotalDataCount = 0;
4369 pSMB->DataCount = 0;
4370 pSMB->DataOffset = 0;
4371 pSMB->MaxParameterCount = cpu_to_le16(2);
4372 pSMB->MaxDataCount = cpu_to_le16(100); /* BB find exact max SMB PDU from sess structure BB */
4373 pSMB->MaxSetupCount = 0;
4374 pSMB->Reserved = 0;
4375 pSMB->Flags = 0;
4376 pSMB->Timeout = 0;
4377 pSMB->Reserved2 = 0;
4378 byte_count = params + 1 /* pad */ ;
4379 pSMB->ParameterCount = cpu_to_le16(params);
4380 pSMB->TotalParameterCount = pSMB->ParameterCount;
4381 pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
4382 smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4383 pSMB->SetupCount = 1;
4384 pSMB->Reserved3 = 0;
4385 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4386 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_CIFS_UNIX_INFO);
4387 pSMB->hdr.smb_buf_length += byte_count;
4388 pSMB->ByteCount = cpu_to_le16(byte_count);
4389
4390 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4391 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4392 if (rc) {
4393 cERROR(1, ("Send error in QFSUnixInfo = %d", rc));
4394 } else { /* decode response */
4395 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4396
4397 if (rc || (pSMBr->ByteCount < 13)) {
4398 rc = -EIO; /* bad smb */
4399 } else {
4400 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4401 response_data =
4402 (FILE_SYSTEM_UNIX_INFO
4403 *) (((char *) &pSMBr->hdr.Protocol) +
4404 data_offset);
4405 memcpy(&tcon->fsUnixInfo, response_data,
4406 sizeof(FILE_SYSTEM_UNIX_INFO));
4407 }
4408 }
4409 cifs_buf_release(pSMB);
4410
4411 if (rc == -EAGAIN)
4412 goto QFSUnixRetry;
4413
4414
4415 return rc;
4416 }
4417
4418 int
4419 CIFSSMBSetFSUnixInfo(const int xid, struct cifsTconInfo *tcon, __u64 cap)
4420 {
4421 /* level 0x200 SMB_SET_CIFS_UNIX_INFO */
4422 TRANSACTION2_SETFSI_REQ *pSMB = NULL;
4423 TRANSACTION2_SETFSI_RSP *pSMBr = NULL;
4424 int rc = 0;
4425 int bytes_returned = 0;
4426 __u16 params, param_offset, offset, byte_count;
4427
4428 cFYI(1, ("In SETFSUnixInfo"));
4429 SETFSUnixRetry:
4430 /* BB switch to small buf init to save memory */
4431 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4432 (void **) &pSMBr);
4433 if (rc)
4434 return rc;
4435
4436 params = 4; /* 2 bytes zero followed by info level. */
4437 pSMB->MaxSetupCount = 0;
4438 pSMB->Reserved = 0;
4439 pSMB->Flags = 0;
4440 pSMB->Timeout = 0;
4441 pSMB->Reserved2 = 0;
4442 param_offset = offsetof(struct smb_com_transaction2_setfsi_req, FileNum)
4443 - 4;
4444 offset = param_offset + params;
4445
4446 pSMB->MaxParameterCount = cpu_to_le16(4);
4447 pSMB->MaxDataCount = cpu_to_le16(100); /* BB find exact max SMB PDU from sess structure BB */
4448 pSMB->SetupCount = 1;
4449 pSMB->Reserved3 = 0;
4450 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FS_INFORMATION);
4451 byte_count = 1 /* pad */ + params + 12;
4452
4453 pSMB->DataCount = cpu_to_le16(12);
4454 pSMB->ParameterCount = cpu_to_le16(params);
4455 pSMB->TotalDataCount = pSMB->DataCount;
4456 pSMB->TotalParameterCount = pSMB->ParameterCount;
4457 pSMB->ParameterOffset = cpu_to_le16(param_offset);
4458 pSMB->DataOffset = cpu_to_le16(offset);
4459
4460 /* Params. */
4461 pSMB->FileNum = 0;
4462 pSMB->InformationLevel = cpu_to_le16(SMB_SET_CIFS_UNIX_INFO);
4463
4464 /* Data. */
4465 pSMB->ClientUnixMajor = cpu_to_le16(CIFS_UNIX_MAJOR_VERSION);
4466 pSMB->ClientUnixMinor = cpu_to_le16(CIFS_UNIX_MINOR_VERSION);
4467 pSMB->ClientUnixCap = cpu_to_le64(cap);
4468
4469 pSMB->hdr.smb_buf_length += byte_count;
4470 pSMB->ByteCount = cpu_to_le16(byte_count);
4471
4472 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4473 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4474 if (rc) {
4475 cERROR(1, ("Send error in SETFSUnixInfo = %d", rc));
4476 } else { /* decode response */
4477 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4478 if (rc)
4479 rc = -EIO; /* bad smb */
4480 }
4481 cifs_buf_release(pSMB);
4482
4483 if (rc == -EAGAIN)
4484 goto SETFSUnixRetry;
4485
4486 return rc;
4487 }
4488
4489
4490
4491 int
4492 CIFSSMBQFSPosixInfo(const int xid, struct cifsTconInfo *tcon,
4493 struct kstatfs *FSData)
4494 {
4495 /* level 0x201 SMB_QUERY_CIFS_POSIX_INFO */
4496 TRANSACTION2_QFSI_REQ *pSMB = NULL;
4497 TRANSACTION2_QFSI_RSP *pSMBr = NULL;
4498 FILE_SYSTEM_POSIX_INFO *response_data;
4499 int rc = 0;
4500 int bytes_returned = 0;
4501 __u16 params, byte_count;
4502
4503 cFYI(1, ("In QFSPosixInfo"));
4504 QFSPosixRetry:
4505 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4506 (void **) &pSMBr);
4507 if (rc)
4508 return rc;
4509
4510 params = 2; /* level */
4511 pSMB->TotalDataCount = 0;
4512 pSMB->DataCount = 0;
4513 pSMB->DataOffset = 0;
4514 pSMB->MaxParameterCount = cpu_to_le16(2);
4515 pSMB->MaxDataCount = cpu_to_le16(100); /* BB find exact max SMB PDU from sess structure BB */
4516 pSMB->MaxSetupCount = 0;
4517 pSMB->Reserved = 0;
4518 pSMB->Flags = 0;
4519 pSMB->Timeout = 0;
4520 pSMB->Reserved2 = 0;
4521 byte_count = params + 1 /* pad */ ;
4522 pSMB->ParameterCount = cpu_to_le16(params);
4523 pSMB->TotalParameterCount = pSMB->ParameterCount;
4524 pSMB->ParameterOffset = cpu_to_le16(offsetof(struct
4525 smb_com_transaction2_qfsi_req, InformationLevel) - 4);
4526 pSMB->SetupCount = 1;
4527 pSMB->Reserved3 = 0;
4528 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION);
4529 pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_FS_INFO);
4530 pSMB->hdr.smb_buf_length += byte_count;
4531 pSMB->ByteCount = cpu_to_le16(byte_count);
4532
4533 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4534 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4535 if (rc) {
4536 cFYI(1, ("Send error in QFSUnixInfo = %d", rc));
4537 } else { /* decode response */
4538 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
4539
4540 if (rc || (pSMBr->ByteCount < 13)) {
4541 rc = -EIO; /* bad smb */
4542 } else {
4543 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
4544 response_data =
4545 (FILE_SYSTEM_POSIX_INFO
4546 *) (((char *) &pSMBr->hdr.Protocol) +
4547 data_offset);
4548 FSData->f_bsize =
4549 le32_to_cpu(response_data->BlockSize);
4550 FSData->f_blocks =
4551 le64_to_cpu(response_data->TotalBlocks);
4552 FSData->f_bfree =
4553 le64_to_cpu(response_data->BlocksAvail);
4554 if (response_data->UserBlocksAvail == cpu_to_le64(-1)) {
4555 FSData->f_bavail = FSData->f_bfree;
4556 } else {
4557 FSData->f_bavail =
4558 le64_to_cpu(response_data->UserBlocksAvail);
4559 }
4560 if (response_data->TotalFileNodes != cpu_to_le64(-1))
4561 FSData->f_files =
4562 le64_to_cpu(response_data->TotalFileNodes);
4563 if (response_data->FreeFileNodes != cpu_to_le64(-1))
4564 FSData->f_ffree =
4565 le64_to_cpu(response_data->FreeFileNodes);
4566 }
4567 }
4568 cifs_buf_release(pSMB);
4569
4570 if (rc == -EAGAIN)
4571 goto QFSPosixRetry;
4572
4573 return rc;
4574 }
4575
4576
4577 /* We can not use write of zero bytes trick to
4578 set file size due to need for large file support. Also note that
4579 this SetPathInfo is preferred to SetFileInfo based method in next
4580 routine which is only needed to work around a sharing violation bug
4581 in Samba which this routine can run into */
4582
4583 int
4584 CIFSSMBSetEOF(const int xid, struct cifsTconInfo *tcon, const char *fileName,
4585 __u64 size, int SetAllocation,
4586 const struct nls_table *nls_codepage, int remap)
4587 {
4588 struct smb_com_transaction2_spi_req *pSMB = NULL;
4589 struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
4590 struct file_end_of_file_info *parm_data;
4591 int name_len;
4592 int rc = 0;
4593 int bytes_returned = 0;
4594 __u16 params, byte_count, data_count, param_offset, offset;
4595
4596 cFYI(1, ("In SetEOF"));
4597 SetEOFRetry:
4598 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4599 (void **) &pSMBr);
4600 if (rc)
4601 return rc;
4602
4603 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
4604 name_len =
4605 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
4606 PATH_MAX, nls_codepage, remap);
4607 name_len++; /* trailing null */
4608 name_len *= 2;
4609 } else { /* BB improve the check for buffer overruns BB */
4610 name_len = strnlen(fileName, PATH_MAX);
4611 name_len++; /* trailing null */
4612 strncpy(pSMB->FileName, fileName, name_len);
4613 }
4614 params = 6 + name_len;
4615 data_count = sizeof(struct file_end_of_file_info);
4616 pSMB->MaxParameterCount = cpu_to_le16(2);
4617 pSMB->MaxDataCount = cpu_to_le16(4100);
4618 pSMB->MaxSetupCount = 0;
4619 pSMB->Reserved = 0;
4620 pSMB->Flags = 0;
4621 pSMB->Timeout = 0;
4622 pSMB->Reserved2 = 0;
4623 param_offset = offsetof(struct smb_com_transaction2_spi_req,
4624 InformationLevel) - 4;
4625 offset = param_offset + params;
4626 if (SetAllocation) {
4627 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4628 pSMB->InformationLevel =
4629 cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
4630 else
4631 pSMB->InformationLevel =
4632 cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
4633 } else /* Set File Size */ {
4634 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4635 pSMB->InformationLevel =
4636 cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
4637 else
4638 pSMB->InformationLevel =
4639 cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
4640 }
4641
4642 parm_data =
4643 (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol) +
4644 offset);
4645 pSMB->ParameterOffset = cpu_to_le16(param_offset);
4646 pSMB->DataOffset = cpu_to_le16(offset);
4647 pSMB->SetupCount = 1;
4648 pSMB->Reserved3 = 0;
4649 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
4650 byte_count = 3 /* pad */ + params + data_count;
4651 pSMB->DataCount = cpu_to_le16(data_count);
4652 pSMB->TotalDataCount = pSMB->DataCount;
4653 pSMB->ParameterCount = cpu_to_le16(params);
4654 pSMB->TotalParameterCount = pSMB->ParameterCount;
4655 pSMB->Reserved4 = 0;
4656 pSMB->hdr.smb_buf_length += byte_count;
4657 parm_data->FileSize = cpu_to_le64(size);
4658 pSMB->ByteCount = cpu_to_le16(byte_count);
4659 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4660 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4661 if (rc)
4662 cFYI(1, ("SetPathInfo (file size) returned %d", rc));
4663
4664 cifs_buf_release(pSMB);
4665
4666 if (rc == -EAGAIN)
4667 goto SetEOFRetry;
4668
4669 return rc;
4670 }
4671
4672 int
4673 CIFSSMBSetFileSize(const int xid, struct cifsTconInfo *tcon, __u64 size,
4674 __u16 fid, __u32 pid_of_opener, int SetAllocation)
4675 {
4676 struct smb_com_transaction2_sfi_req *pSMB = NULL;
4677 char *data_offset;
4678 struct file_end_of_file_info *parm_data;
4679 int rc = 0;
4680 __u16 params, param_offset, offset, byte_count, count;
4681
4682 cFYI(1, ("SetFileSize (via SetFileInfo) %lld",
4683 (long long)size));
4684 rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
4685
4686 if (rc)
4687 return rc;
4688
4689 pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
4690 pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));
4691
4692 params = 6;
4693 pSMB->MaxSetupCount = 0;
4694 pSMB->Reserved = 0;
4695 pSMB->Flags = 0;
4696 pSMB->Timeout = 0;
4697 pSMB->Reserved2 = 0;
4698 param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
4699 offset = param_offset + params;
4700
4701 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
4702
4703 count = sizeof(struct file_end_of_file_info);
4704 pSMB->MaxParameterCount = cpu_to_le16(2);
4705 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB PDU from sess */
4706 pSMB->SetupCount = 1;
4707 pSMB->Reserved3 = 0;
4708 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
4709 byte_count = 3 /* pad */ + params + count;
4710 pSMB->DataCount = cpu_to_le16(count);
4711 pSMB->ParameterCount = cpu_to_le16(params);
4712 pSMB->TotalDataCount = pSMB->DataCount;
4713 pSMB->TotalParameterCount = pSMB->ParameterCount;
4714 pSMB->ParameterOffset = cpu_to_le16(param_offset);
4715 parm_data =
4716 (struct file_end_of_file_info *) (((char *) &pSMB->hdr.Protocol)
4717 + offset);
4718 pSMB->DataOffset = cpu_to_le16(offset);
4719 parm_data->FileSize = cpu_to_le64(size);
4720 pSMB->Fid = fid;
4721 if (SetAllocation) {
4722 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4723 pSMB->InformationLevel =
4724 cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO2);
4725 else
4726 pSMB->InformationLevel =
4727 cpu_to_le16(SMB_SET_FILE_ALLOCATION_INFO);
4728 } else /* Set File Size */ {
4729 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4730 pSMB->InformationLevel =
4731 cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO2);
4732 else
4733 pSMB->InformationLevel =
4734 cpu_to_le16(SMB_SET_FILE_END_OF_FILE_INFO);
4735 }
4736 pSMB->Reserved4 = 0;
4737 pSMB->hdr.smb_buf_length += byte_count;
4738 pSMB->ByteCount = cpu_to_le16(byte_count);
4739 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
4740 if (rc) {
4741 cFYI(1,
4742 ("Send error in SetFileInfo (SetFileSize) = %d",
4743 rc));
4744 }
4745
4746 /* Note: On -EAGAIN error only caller can retry on handle based calls
4747 since file handle passed in no longer valid */
4748
4749 return rc;
4750 }
4751
4752 /* Some legacy servers such as NT4 require that the file times be set on
4753 an open handle, rather than by pathname - this is awkward due to
4754 potential access conflicts on the open, but it is unavoidable for these
4755 old servers since the only other choice is to go from 100 nanosecond DCE
4756 time and resort to the original setpathinfo level which takes the ancient
4757 DOS time format with 2 second granularity */
4758 int
4759 CIFSSMBSetFileTimes(const int xid, struct cifsTconInfo *tcon,
4760 const FILE_BASIC_INFO *data, __u16 fid)
4761 {
4762 struct smb_com_transaction2_sfi_req *pSMB = NULL;
4763 char *data_offset;
4764 int rc = 0;
4765 __u16 params, param_offset, offset, byte_count, count;
4766
4767 cFYI(1, ("Set Times (via SetFileInfo)"));
4768 rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
4769
4770 if (rc)
4771 return rc;
4772
4773 /* At this point there is no need to override the current pid
4774 with the pid of the opener, but that could change if we someday
4775 use an existing handle (rather than opening one on the fly) */
4776 /* pSMB->hdr.Pid = cpu_to_le16((__u16)pid_of_opener);
4777 pSMB->hdr.PidHigh = cpu_to_le16((__u16)(pid_of_opener >> 16));*/
4778
4779 params = 6;
4780 pSMB->MaxSetupCount = 0;
4781 pSMB->Reserved = 0;
4782 pSMB->Flags = 0;
4783 pSMB->Timeout = 0;
4784 pSMB->Reserved2 = 0;
4785 param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
4786 offset = param_offset + params;
4787
4788 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
4789
4790 count = sizeof(FILE_BASIC_INFO);
4791 pSMB->MaxParameterCount = cpu_to_le16(2);
4792 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB PDU from sess */
4793 pSMB->SetupCount = 1;
4794 pSMB->Reserved3 = 0;
4795 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
4796 byte_count = 3 /* pad */ + params + count;
4797 pSMB->DataCount = cpu_to_le16(count);
4798 pSMB->ParameterCount = cpu_to_le16(params);
4799 pSMB->TotalDataCount = pSMB->DataCount;
4800 pSMB->TotalParameterCount = pSMB->ParameterCount;
4801 pSMB->ParameterOffset = cpu_to_le16(param_offset);
4802 pSMB->DataOffset = cpu_to_le16(offset);
4803 pSMB->Fid = fid;
4804 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4805 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
4806 else
4807 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
4808 pSMB->Reserved4 = 0;
4809 pSMB->hdr.smb_buf_length += byte_count;
4810 pSMB->ByteCount = cpu_to_le16(byte_count);
4811 memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
4812 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
4813 if (rc)
4814 cFYI(1, ("Send error in Set Time (SetFileInfo) = %d", rc));
4815
4816 /* Note: On -EAGAIN error only caller can retry on handle based calls
4817 since file handle passed in no longer valid */
4818
4819 return rc;
4820 }
4821
4822
4823 int
4824 CIFSSMBSetTimes(const int xid, struct cifsTconInfo *tcon, const char *fileName,
4825 const FILE_BASIC_INFO *data,
4826 const struct nls_table *nls_codepage, int remap)
4827 {
4828 TRANSACTION2_SPI_REQ *pSMB = NULL;
4829 TRANSACTION2_SPI_RSP *pSMBr = NULL;
4830 int name_len;
4831 int rc = 0;
4832 int bytes_returned = 0;
4833 char *data_offset;
4834 __u16 params, param_offset, offset, byte_count, count;
4835
4836 cFYI(1, ("In SetTimes"));
4837
4838 SetTimesRetry:
4839 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4840 (void **) &pSMBr);
4841 if (rc)
4842 return rc;
4843
4844 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
4845 name_len =
4846 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
4847 PATH_MAX, nls_codepage, remap);
4848 name_len++; /* trailing null */
4849 name_len *= 2;
4850 } else { /* BB improve the check for buffer overruns BB */
4851 name_len = strnlen(fileName, PATH_MAX);
4852 name_len++; /* trailing null */
4853 strncpy(pSMB->FileName, fileName, name_len);
4854 }
4855
4856 params = 6 + name_len;
4857 count = sizeof(FILE_BASIC_INFO);
4858 pSMB->MaxParameterCount = cpu_to_le16(2);
4859 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */
4860 pSMB->MaxSetupCount = 0;
4861 pSMB->Reserved = 0;
4862 pSMB->Flags = 0;
4863 pSMB->Timeout = 0;
4864 pSMB->Reserved2 = 0;
4865 param_offset = offsetof(struct smb_com_transaction2_spi_req,
4866 InformationLevel) - 4;
4867 offset = param_offset + params;
4868 data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
4869 pSMB->ParameterOffset = cpu_to_le16(param_offset);
4870 pSMB->DataOffset = cpu_to_le16(offset);
4871 pSMB->SetupCount = 1;
4872 pSMB->Reserved3 = 0;
4873 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
4874 byte_count = 3 /* pad */ + params + count;
4875
4876 pSMB->DataCount = cpu_to_le16(count);
4877 pSMB->ParameterCount = cpu_to_le16(params);
4878 pSMB->TotalDataCount = pSMB->DataCount;
4879 pSMB->TotalParameterCount = pSMB->ParameterCount;
4880 if (tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)
4881 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO2);
4882 else
4883 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_BASIC_INFO);
4884 pSMB->Reserved4 = 0;
4885 pSMB->hdr.smb_buf_length += byte_count;
4886 memcpy(data_offset, data, sizeof(FILE_BASIC_INFO));
4887 pSMB->ByteCount = cpu_to_le16(byte_count);
4888 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4889 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4890 if (rc)
4891 cFYI(1, ("SetPathInfo (times) returned %d", rc));
4892
4893 cifs_buf_release(pSMB);
4894
4895 if (rc == -EAGAIN)
4896 goto SetTimesRetry;
4897
4898 return rc;
4899 }
4900
4901 /* Can not be used to set time stamps yet (due to old DOS time format) */
4902 /* Can be used to set attributes */
4903 #if 0 /* Possibly not needed - since it turns out that strangely NT4 has a bug
4904 handling it anyway and NT4 was what we thought it would be needed for
4905 Do not delete it until we prove whether needed for Win9x though */
4906 int
4907 CIFSSMBSetAttrLegacy(int xid, struct cifsTconInfo *tcon, char *fileName,
4908 __u16 dos_attrs, const struct nls_table *nls_codepage)
4909 {
4910 SETATTR_REQ *pSMB = NULL;
4911 SETATTR_RSP *pSMBr = NULL;
4912 int rc = 0;
4913 int bytes_returned;
4914 int name_len;
4915
4916 cFYI(1, ("In SetAttrLegacy"));
4917
4918 SetAttrLgcyRetry:
4919 rc = smb_init(SMB_COM_SETATTR, 8, tcon, (void **) &pSMB,
4920 (void **) &pSMBr);
4921 if (rc)
4922 return rc;
4923
4924 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
4925 name_len =
4926 ConvertToUCS((__le16 *) pSMB->fileName, fileName,
4927 PATH_MAX, nls_codepage);
4928 name_len++; /* trailing null */
4929 name_len *= 2;
4930 } else { /* BB improve the check for buffer overruns BB */
4931 name_len = strnlen(fileName, PATH_MAX);
4932 name_len++; /* trailing null */
4933 strncpy(pSMB->fileName, fileName, name_len);
4934 }
4935 pSMB->attr = cpu_to_le16(dos_attrs);
4936 pSMB->BufferFormat = 0x04;
4937 pSMB->hdr.smb_buf_length += name_len + 1;
4938 pSMB->ByteCount = cpu_to_le16(name_len + 1);
4939 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
4940 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
4941 if (rc)
4942 cFYI(1, ("Error in LegacySetAttr = %d", rc));
4943
4944 cifs_buf_release(pSMB);
4945
4946 if (rc == -EAGAIN)
4947 goto SetAttrLgcyRetry;
4948
4949 return rc;
4950 }
4951 #endif /* temporarily unneeded SetAttr legacy function */
4952
4953 int
4954 CIFSSMBUnixSetPerms(const int xid, struct cifsTconInfo *tcon,
4955 char *fileName, __u64 mode, __u64 uid, __u64 gid,
4956 dev_t device, const struct nls_table *nls_codepage,
4957 int remap)
4958 {
4959 TRANSACTION2_SPI_REQ *pSMB = NULL;
4960 TRANSACTION2_SPI_RSP *pSMBr = NULL;
4961 int name_len;
4962 int rc = 0;
4963 int bytes_returned = 0;
4964 FILE_UNIX_BASIC_INFO *data_offset;
4965 __u16 params, param_offset, offset, count, byte_count;
4966
4967 cFYI(1, ("In SetUID/GID/Mode"));
4968 setPermsRetry:
4969 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
4970 (void **) &pSMBr);
4971 if (rc)
4972 return rc;
4973
4974 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
4975 name_len =
4976 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
4977 PATH_MAX, nls_codepage, remap);
4978 name_len++; /* trailing null */
4979 name_len *= 2;
4980 } else { /* BB improve the check for buffer overruns BB */
4981 name_len = strnlen(fileName, PATH_MAX);
4982 name_len++; /* trailing null */
4983 strncpy(pSMB->FileName, fileName, name_len);
4984 }
4985
4986 params = 6 + name_len;
4987 count = sizeof(FILE_UNIX_BASIC_INFO);
4988 pSMB->MaxParameterCount = cpu_to_le16(2);
4989 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */
4990 pSMB->MaxSetupCount = 0;
4991 pSMB->Reserved = 0;
4992 pSMB->Flags = 0;
4993 pSMB->Timeout = 0;
4994 pSMB->Reserved2 = 0;
4995 param_offset = offsetof(struct smb_com_transaction2_spi_req,
4996 InformationLevel) - 4;
4997 offset = param_offset + params;
4998 data_offset =
4999 (FILE_UNIX_BASIC_INFO *) ((char *) &pSMB->hdr.Protocol +
5000 offset);
5001 memset(data_offset, 0, count);
5002 pSMB->DataOffset = cpu_to_le16(offset);
5003 pSMB->ParameterOffset = cpu_to_le16(param_offset);
5004 pSMB->SetupCount = 1;
5005 pSMB->Reserved3 = 0;
5006 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
5007 byte_count = 3 /* pad */ + params + count;
5008 pSMB->ParameterCount = cpu_to_le16(params);
5009 pSMB->DataCount = cpu_to_le16(count);
5010 pSMB->TotalParameterCount = pSMB->ParameterCount;
5011 pSMB->TotalDataCount = pSMB->DataCount;
5012 pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_BASIC);
5013 pSMB->Reserved4 = 0;
5014 pSMB->hdr.smb_buf_length += byte_count;
5015 /* Samba server ignores set of file size to zero due to bugs in some
5016 older clients, but we should be precise - we use SetFileSize to
5017 set file size and do not want to truncate file size to zero
5018 accidently as happened on one Samba server beta by putting
5019 zero instead of -1 here */
5020 data_offset->EndOfFile = NO_CHANGE_64;
5021 data_offset->NumOfBytes = NO_CHANGE_64;
5022 data_offset->LastStatusChange = NO_CHANGE_64;
5023 data_offset->LastAccessTime = NO_CHANGE_64;
5024 data_offset->LastModificationTime = NO_CHANGE_64;
5025 data_offset->Uid = cpu_to_le64(uid);
5026 data_offset->Gid = cpu_to_le64(gid);
5027 /* better to leave device as zero when it is */
5028 data_offset->DevMajor = cpu_to_le64(MAJOR(device));
5029 data_offset->DevMinor = cpu_to_le64(MINOR(device));
5030 data_offset->Permissions = cpu_to_le64(mode);
5031
5032 if (S_ISREG(mode))
5033 data_offset->Type = cpu_to_le32(UNIX_FILE);
5034 else if (S_ISDIR(mode))
5035 data_offset->Type = cpu_to_le32(UNIX_DIR);
5036 else if (S_ISLNK(mode))
5037 data_offset->Type = cpu_to_le32(UNIX_SYMLINK);
5038 else if (S_ISCHR(mode))
5039 data_offset->Type = cpu_to_le32(UNIX_CHARDEV);
5040 else if (S_ISBLK(mode))
5041 data_offset->Type = cpu_to_le32(UNIX_BLOCKDEV);
5042 else if (S_ISFIFO(mode))
5043 data_offset->Type = cpu_to_le32(UNIX_FIFO);
5044 else if (S_ISSOCK(mode))
5045 data_offset->Type = cpu_to_le32(UNIX_SOCKET);
5046
5047
5048 pSMB->ByteCount = cpu_to_le16(byte_count);
5049 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
5050 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
5051 if (rc)
5052 cFYI(1, ("SetPathInfo (perms) returned %d", rc));
5053
5054 if (pSMB)
5055 cifs_buf_release(pSMB);
5056 if (rc == -EAGAIN)
5057 goto setPermsRetry;
5058 return rc;
5059 }
5060
5061 int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
5062 const int notify_subdirs, const __u16 netfid,
5063 __u32 filter, struct file *pfile, int multishot,
5064 const struct nls_table *nls_codepage)
5065 {
5066 int rc = 0;
5067 struct smb_com_transaction_change_notify_req *pSMB = NULL;
5068 struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL;
5069 struct dir_notify_req *dnotify_req;
5070 int bytes_returned;
5071
5072 cFYI(1, ("In CIFSSMBNotify for file handle %d", (int)netfid));
5073 rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
5074 (void **) &pSMBr);
5075 if (rc)
5076 return rc;
5077
5078 pSMB->TotalParameterCount = 0 ;
5079 pSMB->TotalDataCount = 0;
5080 pSMB->MaxParameterCount = cpu_to_le32(2);
5081 /* BB find exact data count max from sess structure BB */
5082 pSMB->MaxDataCount = 0; /* same in little endian or be */
5083 /* BB VERIFY verify which is correct for above BB */
5084 pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
5085 MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
5086
5087 pSMB->MaxSetupCount = 4;
5088 pSMB->Reserved = 0;
5089 pSMB->ParameterOffset = 0;
5090 pSMB->DataCount = 0;
5091 pSMB->DataOffset = 0;
5092 pSMB->SetupCount = 4; /* single byte does not need le conversion */
5093 pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE);
5094 pSMB->ParameterCount = pSMB->TotalParameterCount;
5095 if (notify_subdirs)
5096 pSMB->WatchTree = 1; /* one byte - no le conversion needed */
5097 pSMB->Reserved2 = 0;
5098 pSMB->CompletionFilter = cpu_to_le32(filter);
5099 pSMB->Fid = netfid; /* file handle always le */
5100 pSMB->ByteCount = 0;
5101
5102 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
5103 (struct smb_hdr *)pSMBr, &bytes_returned,
5104 CIFS_ASYNC_OP);
5105 if (rc) {
5106 cFYI(1, ("Error in Notify = %d", rc));
5107 } else {
5108 /* Add file to outstanding requests */
5109 /* BB change to kmem cache alloc */
5110 dnotify_req = kmalloc(
5111 sizeof(struct dir_notify_req),
5112 GFP_KERNEL);
5113 if (dnotify_req) {
5114 dnotify_req->Pid = pSMB->hdr.Pid;
5115 dnotify_req->PidHigh = pSMB->hdr.PidHigh;
5116 dnotify_req->Mid = pSMB->hdr.Mid;
5117 dnotify_req->Tid = pSMB->hdr.Tid;
5118 dnotify_req->Uid = pSMB->hdr.Uid;
5119 dnotify_req->netfid = netfid;
5120 dnotify_req->pfile = pfile;
5121 dnotify_req->filter = filter;
5122 dnotify_req->multishot = multishot;
5123 spin_lock(&GlobalMid_Lock);
5124 list_add_tail(&dnotify_req->lhead,
5125 &GlobalDnotifyReqList);
5126 spin_unlock(&GlobalMid_Lock);
5127 } else
5128 rc = -ENOMEM;
5129 }
5130 cifs_buf_release(pSMB);
5131 return rc;
5132 }
5133 #ifdef CONFIG_CIFS_XATTR
5134 ssize_t
5135 CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
5136 const unsigned char *searchName,
5137 char *EAData, size_t buf_size,
5138 const struct nls_table *nls_codepage, int remap)
5139 {
5140 /* BB assumes one setup word */
5141 TRANSACTION2_QPI_REQ *pSMB = NULL;
5142 TRANSACTION2_QPI_RSP *pSMBr = NULL;
5143 int rc = 0;
5144 int bytes_returned;
5145 int name_len;
5146 struct fea *temp_fea;
5147 char *temp_ptr;
5148 __u16 params, byte_count;
5149
5150 cFYI(1, ("In Query All EAs path %s", searchName));
5151 QAllEAsRetry:
5152 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
5153 (void **) &pSMBr);
5154 if (rc)
5155 return rc;
5156
5157 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
5158 name_len =
5159 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
5160 PATH_MAX, nls_codepage, remap);
5161 name_len++; /* trailing null */
5162 name_len *= 2;
5163 } else { /* BB improve the check for buffer overruns BB */
5164 name_len = strnlen(searchName, PATH_MAX);
5165 name_len++; /* trailing null */
5166 strncpy(pSMB->FileName, searchName, name_len);
5167 }
5168
5169 params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
5170 pSMB->TotalDataCount = 0;
5171 pSMB->MaxParameterCount = cpu_to_le16(2);
5172 pSMB->MaxDataCount = cpu_to_le16(4000); /* BB find exact max SMB PDU from sess structure BB */
5173 pSMB->MaxSetupCount = 0;
5174 pSMB->Reserved = 0;
5175 pSMB->Flags = 0;
5176 pSMB->Timeout = 0;
5177 pSMB->Reserved2 = 0;
5178 pSMB->ParameterOffset = cpu_to_le16(offsetof(
5179 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
5180 pSMB->DataCount = 0;
5181 pSMB->DataOffset = 0;
5182 pSMB->SetupCount = 1;
5183 pSMB->Reserved3 = 0;
5184 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
5185 byte_count = params + 1 /* pad */ ;
5186 pSMB->TotalParameterCount = cpu_to_le16(params);
5187 pSMB->ParameterCount = pSMB->TotalParameterCount;
5188 pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
5189 pSMB->Reserved4 = 0;
5190 pSMB->hdr.smb_buf_length += byte_count;
5191 pSMB->ByteCount = cpu_to_le16(byte_count);
5192
5193 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
5194 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
5195 if (rc) {
5196 cFYI(1, ("Send error in QueryAllEAs = %d", rc));
5197 } else { /* decode response */
5198 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
5199
5200 /* BB also check enough total bytes returned */
5201 /* BB we need to improve the validity checking
5202 of these trans2 responses */
5203 if (rc || (pSMBr->ByteCount < 4))
5204 rc = -EIO; /* bad smb */
5205 /* else if (pFindData){
5206 memcpy((char *) pFindData,
5207 (char *) &pSMBr->hdr.Protocol +
5208 data_offset, kl);
5209 }*/ else {
5210 /* check that length of list is not more than bcc */
5211 /* check that each entry does not go beyond length
5212 of list */
5213 /* check that each element of each entry does not
5214 go beyond end of list */
5215 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
5216 struct fealist *ea_response_data;
5217 rc = 0;
5218 /* validate_trans2_offsets() */
5219 /* BB check if start of smb + data_offset > &bcc+ bcc */
5220 ea_response_data = (struct fealist *)
5221 (((char *) &pSMBr->hdr.Protocol) +
5222 data_offset);
5223 name_len = le32_to_cpu(ea_response_data->list_len);
5224 cFYI(1, ("ea length %d", name_len));
5225 if (name_len <= 8) {
5226 /* returned EA size zeroed at top of function */
5227 cFYI(1, ("empty EA list returned from server"));
5228 } else {
5229 /* account for ea list len */
5230 name_len -= 4;
5231 temp_fea = ea_response_data->list;
5232 temp_ptr = (char *)temp_fea;
5233 while (name_len > 0) {
5234 __u16 value_len;
5235 name_len -= 4;
5236 temp_ptr += 4;
5237 rc += temp_fea->name_len;
5238 /* account for prefix user. and trailing null */
5239 rc = rc + 5 + 1;
5240 if (rc < (int)buf_size) {
5241 memcpy(EAData, "user.", 5);
5242 EAData += 5;
5243 memcpy(EAData, temp_ptr,
5244 temp_fea->name_len);
5245 EAData += temp_fea->name_len;
5246 /* null terminate name */
5247 *EAData = 0;
5248 EAData = EAData + 1;
5249 } else if (buf_size == 0) {
5250 /* skip copy - calc size only */
5251 } else {
5252 /* stop before overrun buffer */
5253 rc = -ERANGE;
5254 break;
5255 }
5256 name_len -= temp_fea->name_len;
5257 temp_ptr += temp_fea->name_len;
5258 /* account for trailing null */
5259 name_len--;
5260 temp_ptr++;
5261 value_len =
5262 le16_to_cpu(temp_fea->value_len);
5263 name_len -= value_len;
5264 temp_ptr += value_len;
5265 /* BB check that temp_ptr is still
5266 within the SMB BB*/
5267
5268 /* no trailing null to account for
5269 in value len */
5270 /* go on to next EA */
5271 temp_fea = (struct fea *)temp_ptr;
5272 }
5273 }
5274 }
5275 }
5276 if (pSMB)
5277 cifs_buf_release(pSMB);
5278 if (rc == -EAGAIN)
5279 goto QAllEAsRetry;
5280
5281 return (ssize_t)rc;
5282 }
5283
5284 ssize_t CIFSSMBQueryEA(const int xid, struct cifsTconInfo *tcon,
5285 const unsigned char *searchName, const unsigned char *ea_name,
5286 unsigned char *ea_value, size_t buf_size,
5287 const struct nls_table *nls_codepage, int remap)
5288 {
5289 TRANSACTION2_QPI_REQ *pSMB = NULL;
5290 TRANSACTION2_QPI_RSP *pSMBr = NULL;
5291 int rc = 0;
5292 int bytes_returned;
5293 int name_len;
5294 struct fea *temp_fea;
5295 char *temp_ptr;
5296 __u16 params, byte_count;
5297
5298 cFYI(1, ("In Query EA path %s", searchName));
5299 QEARetry:
5300 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
5301 (void **) &pSMBr);
5302 if (rc)
5303 return rc;
5304
5305 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
5306 name_len =
5307 cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
5308 PATH_MAX, nls_codepage, remap);
5309 name_len++; /* trailing null */
5310 name_len *= 2;
5311 } else { /* BB improve the check for buffer overruns BB */
5312 name_len = strnlen(searchName, PATH_MAX);
5313 name_len++; /* trailing null */
5314 strncpy(pSMB->FileName, searchName, name_len);
5315 }
5316
5317 params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
5318 pSMB->TotalDataCount = 0;
5319 pSMB->MaxParameterCount = cpu_to_le16(2);
5320 pSMB->MaxDataCount = cpu_to_le16(4000); /* BB find exact max SMB PDU from sess structure BB */
5321 pSMB->MaxSetupCount = 0;
5322 pSMB->Reserved = 0;
5323 pSMB->Flags = 0;
5324 pSMB->Timeout = 0;
5325 pSMB->Reserved2 = 0;
5326 pSMB->ParameterOffset = cpu_to_le16(offsetof(
5327 struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
5328 pSMB->DataCount = 0;
5329 pSMB->DataOffset = 0;
5330 pSMB->SetupCount = 1;
5331 pSMB->Reserved3 = 0;
5332 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
5333 byte_count = params + 1 /* pad */ ;
5334 pSMB->TotalParameterCount = cpu_to_le16(params);
5335 pSMB->ParameterCount = pSMB->TotalParameterCount;
5336 pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
5337 pSMB->Reserved4 = 0;
5338 pSMB->hdr.smb_buf_length += byte_count;
5339 pSMB->ByteCount = cpu_to_le16(byte_count);
5340
5341 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
5342 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
5343 if (rc) {
5344 cFYI(1, ("Send error in Query EA = %d", rc));
5345 } else { /* decode response */
5346 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
5347
5348 /* BB also check enough total bytes returned */
5349 /* BB we need to improve the validity checking
5350 of these trans2 responses */
5351 if (rc || (pSMBr->ByteCount < 4))
5352 rc = -EIO; /* bad smb */
5353 /* else if (pFindData){
5354 memcpy((char *) pFindData,
5355 (char *) &pSMBr->hdr.Protocol +
5356 data_offset, kl);
5357 }*/ else {
5358 /* check that length of list is not more than bcc */
5359 /* check that each entry does not go beyond length
5360 of list */
5361 /* check that each element of each entry does not
5362 go beyond end of list */
5363 __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
5364 struct fealist *ea_response_data;
5365 rc = -ENODATA;
5366 /* validate_trans2_offsets() */
5367 /* BB check if start of smb + data_offset > &bcc+ bcc*/
5368 ea_response_data = (struct fealist *)
5369 (((char *) &pSMBr->hdr.Protocol) +
5370 data_offset);
5371 name_len = le32_to_cpu(ea_response_data->list_len);
5372 cFYI(1, ("ea length %d", name_len));
5373 if (name_len <= 8) {
5374 /* returned EA size zeroed at top of function */
5375 cFYI(1, ("empty EA list returned from server"));
5376 } else {
5377 /* account for ea list len */
5378 name_len -= 4;
5379 temp_fea = ea_response_data->list;
5380 temp_ptr = (char *)temp_fea;
5381 /* loop through checking if we have a matching
5382 name and then return the associated value */
5383 while (name_len > 0) {
5384 __u16 value_len;
5385 name_len -= 4;
5386 temp_ptr += 4;
5387 value_len =
5388 le16_to_cpu(temp_fea->value_len);
5389 /* BB validate that value_len falls within SMB,
5390 even though maximum for name_len is 255 */
5391 if (memcmp(temp_fea->name, ea_name,
5392 temp_fea->name_len) == 0) {
5393 /* found a match */
5394 rc = value_len;
5395 /* account for prefix user. and trailing null */
5396 if (rc <= (int)buf_size) {
5397 memcpy(ea_value,
5398 temp_fea->name+temp_fea->name_len+1,
5399 rc);
5400 /* ea values, unlike ea
5401 names, are not null
5402 terminated */
5403 } else if (buf_size == 0) {
5404 /* skip copy - calc size only */
5405 } else {
5406 /* stop before overrun buffer */
5407 rc = -ERANGE;
5408 }
5409 break;
5410 }
5411 name_len -= temp_fea->name_len;
5412 temp_ptr += temp_fea->name_len;
5413 /* account for trailing null */
5414 name_len--;
5415 temp_ptr++;
5416 name_len -= value_len;
5417 temp_ptr += value_len;
5418 /* No trailing null to account for in
5419 value_len. Go on to next EA */
5420 temp_fea = (struct fea *)temp_ptr;
5421 }
5422 }
5423 }
5424 }
5425 if (pSMB)
5426 cifs_buf_release(pSMB);
5427 if (rc == -EAGAIN)
5428 goto QEARetry;
5429
5430 return (ssize_t)rc;
5431 }
5432
5433 int
5434 CIFSSMBSetEA(const int xid, struct cifsTconInfo *tcon, const char *fileName,
5435 const char *ea_name, const void *ea_value,
5436 const __u16 ea_value_len, const struct nls_table *nls_codepage,
5437 int remap)
5438 {
5439 struct smb_com_transaction2_spi_req *pSMB = NULL;
5440 struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
5441 struct fealist *parm_data;
5442 int name_len;
5443 int rc = 0;
5444 int bytes_returned = 0;
5445 __u16 params, param_offset, byte_count, offset, count;
5446
5447 cFYI(1, ("In SetEA"));
5448 SetEARetry:
5449 rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
5450 (void **) &pSMBr);
5451 if (rc)
5452 return rc;
5453
5454 if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
5455 name_len =
5456 cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
5457 PATH_MAX, nls_codepage, remap);
5458 name_len++; /* trailing null */
5459 name_len *= 2;
5460 } else { /* BB improve the check for buffer overruns BB */
5461 name_len = strnlen(fileName, PATH_MAX);
5462 name_len++; /* trailing null */
5463 strncpy(pSMB->FileName, fileName, name_len);
5464 }
5465
5466 params = 6 + name_len;
5467
5468 /* done calculating parms using name_len of file name,
5469 now use name_len to calculate length of ea name
5470 we are going to create in the inode xattrs */
5471 if (ea_name == NULL)
5472 name_len = 0;
5473 else
5474 name_len = strnlen(ea_name, 255);
5475
5476 count = sizeof(*parm_data) + ea_value_len + name_len;
5477 pSMB->MaxParameterCount = cpu_to_le16(2);
5478 pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB size from sess */
5479 pSMB->MaxSetupCount = 0;
5480 pSMB->Reserved = 0;
5481 pSMB->Flags = 0;
5482 pSMB->Timeout = 0;
5483 pSMB->Reserved2 = 0;
5484 param_offset = offsetof(struct smb_com_transaction2_spi_req,
5485 InformationLevel) - 4;
5486 offset = param_offset + params;
5487 pSMB->InformationLevel =
5488 cpu_to_le16(SMB_SET_FILE_EA);
5489
5490 parm_data =
5491 (struct fealist *) (((char *) &pSMB->hdr.Protocol) +
5492 offset);
5493 pSMB->ParameterOffset = cpu_to_le16(param_offset);
5494 pSMB->DataOffset = cpu_to_le16(offset);
5495 pSMB->SetupCount = 1;
5496 pSMB->Reserved3 = 0;
5497 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
5498 byte_count = 3 /* pad */ + params + count;
5499 pSMB->DataCount = cpu_to_le16(count);
5500 parm_data->list_len = cpu_to_le32(count);
5501 parm_data->list[0].EA_flags = 0;
5502 /* we checked above that name len is less than 255 */
5503 parm_data->list[0].name_len = (__u8)name_len;
5504 /* EA names are always ASCII */
5505 if (ea_name)
5506 strncpy(parm_data->list[0].name, ea_name, name_len);
5507 parm_data->list[0].name[name_len] = 0;
5508 parm_data->list[0].value_len = cpu_to_le16(ea_value_len);
5509 /* caller ensures that ea_value_len is less than 64K but
5510 we need to ensure that it fits within the smb */
5511
5512 /*BB add length check to see if it would fit in
5513 negotiated SMB buffer size BB */
5514 /* if (ea_value_len > buffer_size - 512 (enough for header)) */
5515 if (ea_value_len)
5516 memcpy(parm_data->list[0].name+name_len+1,
5517 ea_value, ea_value_len);
5518
5519 pSMB->TotalDataCount = pSMB->DataCount;
5520 pSMB->ParameterCount = cpu_to_le16(params);
5521 pSMB->TotalParameterCount = pSMB->ParameterCount;
5522 pSMB->Reserved4 = 0;
5523 pSMB->hdr.smb_buf_length += byte_count;
5524 pSMB->ByteCount = cpu_to_le16(byte_count);
5525 rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
5526 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
5527 if (rc)
5528 cFYI(1, ("SetPathInfo (EA) returned %d", rc));
5529
5530 cifs_buf_release(pSMB);
5531
5532 if (rc == -EAGAIN)
5533 goto SetEARetry;
5534
5535 return rc;
5536 }
5537
5538 #endif
WRT350N Kernel Patches