]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - fs/cifs/cifssmb.c
[CIFS] Allow raw ntlmssp code to be enabled with sec=ntlmssp
[linux-2.6.git] / fs / cifs / cifssmb.c
1 /*
2  *   fs/cifs/cifssmb.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2002,2009
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 /* Mark as invalid, all open files on tree connections since they
85    were closed when session to server was lost */
86 static void mark_open_files_invalid(struct cifsTconInfo *pTcon)
87 {
88         struct cifsFileInfo *open_file = NULL;
89         struct list_head *tmp;
90         struct list_head *tmp1;
91
92 /* list all files open on tree connection and mark them invalid */
93         write_lock(&GlobalSMBSeslock);
94         list_for_each_safe(tmp, tmp1, &pTcon->openFileList) {
95                 open_file = list_entry(tmp, struct cifsFileInfo, tlist);
96                 open_file->invalidHandle = true;
97         }
98         write_unlock(&GlobalSMBSeslock);
99         /* BB Add call to invalidate_inodes(sb) for all superblocks mounted
100            to this tcon */
101 }
102
103 /* Allocate and return pointer to an SMB request buffer, and set basic
104    SMB information in the SMB header.  If the return code is zero, this
105    function must have filled in request_buf pointer */
106 static int
107 small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
108                 void **request_buf)
109 {
110         int rc = 0;
111
112         /* SMBs NegProt, SessSetup, uLogoff do not have tcon yet so
113            check for tcp and smb session status done differently
114            for those three - in the calling routine */
115         if (tcon) {
116                 if (tcon->tidStatus == CifsExiting) {
117                         /* only tree disconnect, open, and write,
118                         (and ulogoff which does not have tcon)
119                         are allowed as we start force umount */
120                         if ((smb_command != SMB_COM_WRITE_ANDX) &&
121                            (smb_command != SMB_COM_OPEN_ANDX) &&
122                            (smb_command != SMB_COM_TREE_DISCONNECT)) {
123                                 cFYI(1, ("can not send cmd %d while umounting",
124                                         smb_command));
125                                 return -ENODEV;
126                         }
127                 }
128                 if ((tcon->ses) && (tcon->ses->status != CifsExiting) &&
129                                   (tcon->ses->server)) {
130                         struct nls_table *nls_codepage;
131                                 /* Give Demultiplex thread up to 10 seconds to
132                                    reconnect, should be greater than cifs socket
133                                    timeout which is 7 seconds */
134                         while (tcon->ses->server->tcpStatus ==
135                                                          CifsNeedReconnect) {
136                                 wait_event_interruptible_timeout(tcon->ses->server->response_q,
137                                         (tcon->ses->server->tcpStatus ==
138                                                         CifsGood), 10 * HZ);
139                                 if (tcon->ses->server->tcpStatus ==
140                                                         CifsNeedReconnect) {
141                                         /* on "soft" mounts we wait once */
142                                         if (!tcon->retry ||
143                                            (tcon->ses->status == CifsExiting)) {
144                                                 cFYI(1, ("gave up waiting on "
145                                                       "reconnect in smb_init"));
146                                                 return -EHOSTDOWN;
147                                         } /* else "hard" mount - keep retrying
148                                              until process is killed or server
149                                              comes back on-line */
150                                 } else /* TCP session is reestablished now */
151                                         break;
152                         }
153
154                         nls_codepage = load_nls_default();
155                 /* need to prevent multiple threads trying to
156                 simultaneously reconnect the same SMB session */
157                         down(&tcon->ses->sesSem);
158                         if (tcon->ses->need_reconnect)
159                                 rc = cifs_setup_session(0, tcon->ses,
160                                                         nls_codepage);
161                         if (!rc && (tcon->need_reconnect)) {
162                                 mark_open_files_invalid(tcon);
163                                 rc = CIFSTCon(0, tcon->ses, tcon->treeName,
164                                               tcon, nls_codepage);
165                                 up(&tcon->ses->sesSem);
166                                 /* BB FIXME add code to check if wsize needs
167                                    update due to negotiated smb buffer size
168                                    shrinking */
169                                 if (rc == 0) {
170                                         atomic_inc(&tconInfoReconnectCount);
171                                         /* tell server Unix caps we support */
172                                         if (tcon->ses->capabilities & CAP_UNIX)
173                                                 reset_cifs_unix_caps(
174                                                 0 /* no xid */,
175                                                 tcon,
176                                                 NULL /* we do not know sb */,
177                                                 NULL /* no vol info */);
178                                 }
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 ||
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->need_reconnect)
306                                 rc = cifs_setup_session(0, tcon->ses,
307                                                         nls_codepage);
308                         if (!rc && (tcon->need_reconnect)) {
309                                 mark_open_files_invalid(tcon);
310                                 rc = CIFSTCon(0, tcon->ses, tcon->treeName,
311                                               tcon, nls_codepage);
312                                 up(&tcon->ses->sesSem);
313                                 /* BB FIXME add code to check if wsize needs
314                                 update due to negotiated smb buffer size
315                                 shrinking */
316                                 if (rc == 0) {
317                                         atomic_inc(&tconInfoReconnectCount);
318                                         /* tell server Unix caps we support */
319                                         if (tcon->ses->capabilities & CAP_UNIX)
320                                                 reset_cifs_unix_caps(
321                                                 0 /* no xid */,
322                                                 tcon,
323                                                 NULL /* do not know sb */,
324                                                 NULL /* no vol info */);
325                                 }
326
327                                 cFYI(1, ("reconnect tcon rc = %d", rc));
328                                 /* Removed call to reopen open files here.
329                                    It is safer (and faster) to reopen files
330                                    one at a time as needed in read and write */
331
332                                 /* Check if handle based operation so we
333                                    know whether we can continue or not without
334                                    returning to caller to reset file handle */
335                                 switch (smb_command) {
336                                         case SMB_COM_READ_ANDX:
337                                         case SMB_COM_WRITE_ANDX:
338                                         case SMB_COM_CLOSE:
339                                         case SMB_COM_FIND_CLOSE2:
340                                         case SMB_COM_LOCKING_ANDX: {
341                                                 unload_nls(nls_codepage);
342                                                 return -EAGAIN;
343                                         }
344                                 }
345                         } else {
346                                 up(&tcon->ses->sesSem);
347                         }
348                         unload_nls(nls_codepage);
349
350                 } else {
351                         return -EIO;
352                 }
353         }
354         if (rc)
355                 return rc;
356
357         *request_buf = cifs_buf_get();
358         if (*request_buf == NULL) {
359                 /* BB should we add a retry in here if not a writepage? */
360                 return -ENOMEM;
361         }
362     /* Although the original thought was we needed the response buf for  */
363     /* potential retries of smb operations it turns out we can determine */
364     /* from the mid flags when the request buffer can be resent without  */
365     /* having to use a second distinct buffer for the response */
366         if (response_buf)
367                 *response_buf = *request_buf;
368
369         header_assemble((struct smb_hdr *) *request_buf, smb_command, tcon,
370                         wct);
371
372         if (tcon != NULL)
373                 cifs_stats_inc(&tcon->num_smbs_sent);
374
375         return rc;
376 }
377
378 static int validate_t2(struct smb_t2_rsp *pSMB)
379 {
380         int rc = -EINVAL;
381         int total_size;
382         char *pBCC;
383
384         /* check for plausible wct, bcc and t2 data and parm sizes */
385         /* check for parm and data offset going beyond end of smb */
386         if (pSMB->hdr.WordCount >= 10) {
387                 if ((le16_to_cpu(pSMB->t2_rsp.ParameterOffset) <= 1024) &&
388                    (le16_to_cpu(pSMB->t2_rsp.DataOffset) <= 1024)) {
389                         /* check that bcc is at least as big as parms + data */
390                         /* check that bcc is less than negotiated smb buffer */
391                         total_size = le16_to_cpu(pSMB->t2_rsp.ParameterCount);
392                         if (total_size < 512) {
393                                 total_size +=
394                                         le16_to_cpu(pSMB->t2_rsp.DataCount);
395                                 /* BCC le converted in SendReceive */
396                                 pBCC = (pSMB->hdr.WordCount * 2) +
397                                         sizeof(struct smb_hdr) +
398                                         (char *)pSMB;
399                                 if ((total_size <= (*(u16 *)pBCC)) &&
400                                    (total_size <
401                                         CIFSMaxBufSize+MAX_CIFS_HDR_SIZE)) {
402                                         return 0;
403                                 }
404                         }
405                 }
406         }
407         cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB,
408                 sizeof(struct smb_t2_rsp) + 16);
409         return rc;
410 }
411 int
412 CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
413 {
414         NEGOTIATE_REQ *pSMB;
415         NEGOTIATE_RSP *pSMBr;
416         int rc = 0;
417         int bytes_returned;
418         int i;
419         struct TCP_Server_Info *server;
420         u16 count;
421         unsigned int secFlags;
422         u16 dialect;
423
424         if (ses->server)
425                 server = ses->server;
426         else {
427                 rc = -EIO;
428                 return rc;
429         }
430         rc = smb_init(SMB_COM_NEGOTIATE, 0, NULL /* no tcon yet */ ,
431                       (void **) &pSMB, (void **) &pSMBr);
432         if (rc)
433                 return rc;
434
435         /* if any of auth flags (ie not sign or seal) are overriden use them */
436         if (ses->overrideSecFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
437                 secFlags = ses->overrideSecFlg;  /* BB FIXME fix sign flags? */
438         else /* if override flags set only sign/seal OR them with global auth */
439                 secFlags = extended_security | ses->overrideSecFlg;
440
441         cFYI(1, ("secFlags 0x%x", secFlags));
442
443         pSMB->hdr.Mid = GetNextMid(server);
444         pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
445
446         if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
447                 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
448         else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
449                 cFYI(1, ("Kerberos only mechanism, enable extended security"));
450                 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
451         }
452 #ifdef CONFIG_CIFS_EXPERIMENTAL
453         else if ((secFlags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP)
454                 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
455         else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_NTLMSSP) {
456                 cFYI(1, ("NTLMSSP only mechanism, enable extended security"));
457                 pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
458         }
459 #endif
460
461         count = 0;
462         for (i = 0; i < CIFS_NUM_PROT; i++) {
463                 strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
464                 count += strlen(protocols[i].name) + 1;
465                 /* null at end of source and target buffers anyway */
466         }
467         pSMB->hdr.smb_buf_length += count;
468         pSMB->ByteCount = cpu_to_le16(count);
469
470         rc = SendReceive(xid, ses, (struct smb_hdr *) pSMB,
471                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
472         if (rc != 0)
473                 goto neg_err_exit;
474
475         dialect = le16_to_cpu(pSMBr->DialectIndex);
476         cFYI(1, ("Dialect: %d", dialect));
477         /* Check wct = 1 error case */
478         if ((pSMBr->hdr.WordCount < 13) || (dialect == BAD_PROT)) {
479                 /* core returns wct = 1, but we do not ask for core - otherwise
480                 small wct just comes when dialect index is -1 indicating we
481                 could not negotiate a common dialect */
482                 rc = -EOPNOTSUPP;
483                 goto neg_err_exit;
484 #ifdef CONFIG_CIFS_WEAK_PW_HASH
485         } else if ((pSMBr->hdr.WordCount == 13)
486                         && ((dialect == LANMAN_PROT)
487                                 || (dialect == LANMAN2_PROT))) {
488                 __s16 tmp;
489                 struct lanman_neg_rsp *rsp = (struct lanman_neg_rsp *)pSMBr;
490
491                 if ((secFlags & CIFSSEC_MAY_LANMAN) ||
492                         (secFlags & CIFSSEC_MAY_PLNTXT))
493                         server->secType = LANMAN;
494                 else {
495                         cERROR(1, ("mount failed weak security disabled"
496                                    " in /proc/fs/cifs/SecurityFlags"));
497                         rc = -EOPNOTSUPP;
498                         goto neg_err_exit;
499                 }
500                 server->secMode = (__u8)le16_to_cpu(rsp->SecurityMode);
501                 server->maxReq = le16_to_cpu(rsp->MaxMpxCount);
502                 server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize),
503                                 (__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
504                 server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs);
505                 GETU32(server->sessid) = le32_to_cpu(rsp->SessionKey);
506                 /* even though we do not use raw we might as well set this
507                 accurately, in case we ever find a need for it */
508                 if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) {
509                         server->max_rw = 0xFF00;
510                         server->capabilities = CAP_MPX_MODE | CAP_RAW_MODE;
511                 } else {
512                         server->max_rw = 0;/* do not need to use raw anyway */
513                         server->capabilities = CAP_MPX_MODE;
514                 }
515                 tmp = (__s16)le16_to_cpu(rsp->ServerTimeZone);
516                 if (tmp == -1) {
517                         /* OS/2 often does not set timezone therefore
518                          * we must use server time to calc time zone.
519                          * Could deviate slightly from the right zone.
520                          * Smallest defined timezone difference is 15 minutes
521                          * (i.e. Nepal).  Rounding up/down is done to match
522                          * this requirement.
523                          */
524                         int val, seconds, remain, result;
525                         struct timespec ts, utc;
526                         utc = CURRENT_TIME;
527                         ts = cnvrtDosUnixTm(le16_to_cpu(rsp->SrvTime.Date),
528                                                 le16_to_cpu(rsp->SrvTime.Time));
529                         cFYI(1, ("SrvTime %d sec since 1970 (utc: %d) diff: %d",
530                                 (int)ts.tv_sec, (int)utc.tv_sec,
531                                 (int)(utc.tv_sec - ts.tv_sec)));
532                         val = (int)(utc.tv_sec - ts.tv_sec);
533                         seconds = abs(val);
534                         result = (seconds / MIN_TZ_ADJ) * MIN_TZ_ADJ;
535                         remain = seconds % MIN_TZ_ADJ;
536                         if (remain >= (MIN_TZ_ADJ / 2))
537                                 result += MIN_TZ_ADJ;
538                         if (val < 0)
539                                 result = -result;
540                         server->timeAdj = result;
541                 } else {
542                         server->timeAdj = (int)tmp;
543                         server->timeAdj *= 60; /* also in seconds */
544                 }
545                 cFYI(1, ("server->timeAdj: %d seconds", server->timeAdj));
546
547
548                 /* BB get server time for time conversions and add
549                 code to use it and timezone since this is not UTC */
550
551                 if (rsp->EncryptionKeyLength ==
552                                 cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
553                         memcpy(server->cryptKey, rsp->EncryptionKey,
554                                 CIFS_CRYPTO_KEY_SIZE);
555                 } else if (server->secMode & SECMODE_PW_ENCRYPT) {
556                         rc = -EIO; /* need cryptkey unless plain text */
557                         goto neg_err_exit;
558                 }
559
560                 cFYI(1, ("LANMAN negotiated"));
561                 /* we will not end up setting signing flags - as no signing
562                 was in LANMAN and server did not return the flags on */
563                 goto signing_check;
564 #else /* weak security disabled */
565         } else if (pSMBr->hdr.WordCount == 13) {
566                 cERROR(1, ("mount failed, cifs module not built "
567                           "with CIFS_WEAK_PW_HASH support"));
568                         rc = -EOPNOTSUPP;
569 #endif /* WEAK_PW_HASH */
570                 goto neg_err_exit;
571         } else if (pSMBr->hdr.WordCount != 17) {
572                 /* unknown wct */
573                 rc = -EOPNOTSUPP;
574                 goto neg_err_exit;
575         }
576         /* else wct == 17 NTLM */
577         server->secMode = pSMBr->SecurityMode;
578         if ((server->secMode & SECMODE_USER) == 0)
579                 cFYI(1, ("share mode security"));
580
581         if ((server->secMode & SECMODE_PW_ENCRYPT) == 0)
582 #ifdef CONFIG_CIFS_WEAK_PW_HASH
583                 if ((secFlags & CIFSSEC_MAY_PLNTXT) == 0)
584 #endif /* CIFS_WEAK_PW_HASH */
585                         cERROR(1, ("Server requests plain text password"
586                                   " but client support disabled"));
587
588         if ((secFlags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2)
589                 server->secType = NTLMv2;
590         else if (secFlags & CIFSSEC_MAY_NTLM)
591                 server->secType = NTLM;
592         else if (secFlags & CIFSSEC_MAY_NTLMV2)
593                 server->secType = NTLMv2;
594         else if (secFlags & CIFSSEC_MAY_KRB5)
595                 server->secType = Kerberos;
596         else if (secFlags & CIFSSEC_MAY_NTLMSSP)
597                 server->secType = NTLMSSP;
598         else if (secFlags & CIFSSEC_MAY_LANMAN)
599                 server->secType = LANMAN;
600 /* #ifdef CONFIG_CIFS_EXPERIMENTAL
601         else if (secFlags & CIFSSEC_MAY_PLNTXT)
602                 server->secType = ??
603 #endif */
604         else {
605                 rc = -EOPNOTSUPP;
606                 cERROR(1, ("Invalid security type"));
607                 goto neg_err_exit;
608         }
609         /* else ... any others ...? */
610
611         /* one byte, so no need to convert this or EncryptionKeyLen from
612            little endian */
613         server->maxReq = le16_to_cpu(pSMBr->MaxMpxCount);
614         /* probably no need to store and check maxvcs */
615         server->maxBuf = min(le32_to_cpu(pSMBr->MaxBufferSize),
616                         (__u32) CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
617         server->max_rw = le32_to_cpu(pSMBr->MaxRawSize);
618         cFYI(DBG2, ("Max buf = %d", ses->server->maxBuf));
619         GETU32(ses->server->sessid) = le32_to_cpu(pSMBr->SessionKey);
620         server->capabilities = le32_to_cpu(pSMBr->Capabilities);
621         server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone);
622         server->timeAdj *= 60;
623         if (pSMBr->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
624                 memcpy(server->cryptKey, pSMBr->u.EncryptionKey,
625                        CIFS_CRYPTO_KEY_SIZE);
626         } else if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC)
627                         && (pSMBr->EncryptionKeyLength == 0)) {
628                 /* decode security blob */
629         } else if (server->secMode & SECMODE_PW_ENCRYPT) {
630                 rc = -EIO; /* no crypt key only if plain text pwd */
631                 goto neg_err_exit;
632         }
633
634         /* BB might be helpful to save off the domain of server here */
635
636         if ((pSMBr->hdr.Flags2 & SMBFLG2_EXT_SEC) &&
637                 (server->capabilities & CAP_EXTENDED_SECURITY)) {
638                 count = pSMBr->ByteCount;
639                 if (count < 16) {
640                         rc = -EIO;
641                         goto neg_err_exit;
642                 }
643                 read_lock(&cifs_tcp_ses_lock);
644                 if (server->srv_count > 1) {
645                         read_unlock(&cifs_tcp_ses_lock);
646                         if (memcmp(server->server_GUID,
647                                    pSMBr->u.extended_response.
648                                    GUID, 16) != 0) {
649                                 cFYI(1, ("server UID changed"));
650                                 memcpy(server->server_GUID,
651                                         pSMBr->u.extended_response.GUID,
652                                         16);
653                         }
654                 } else {
655                         read_unlock(&cifs_tcp_ses_lock);
656                         memcpy(server->server_GUID,
657                                pSMBr->u.extended_response.GUID, 16);
658                 }
659
660                 if (count == 16) {
661                         server->secType = RawNTLMSSP;
662                 } else {
663                         rc = decode_negTokenInit(pSMBr->u.extended_response.
664                                                  SecurityBlob,
665                                                  count - 16,
666                                                  &server->secType);
667                         if (rc == 1)
668                                 rc = 0;
669                         else
670                                 rc = -EINVAL;
671                 }
672         } else
673                 server->capabilities &= ~CAP_EXTENDED_SECURITY;
674
675 #ifdef CONFIG_CIFS_WEAK_PW_HASH
676 signing_check:
677 #endif
678         if ((secFlags & CIFSSEC_MAY_SIGN) == 0) {
679                 /* MUST_SIGN already includes the MAY_SIGN FLAG
680                    so if this is zero it means that signing is disabled */
681                 cFYI(1, ("Signing disabled"));
682                 if (server->secMode & SECMODE_SIGN_REQUIRED) {
683                         cERROR(1, ("Server requires "
684                                    "packet signing to be enabled in "
685                                    "/proc/fs/cifs/SecurityFlags."));
686                         rc = -EOPNOTSUPP;
687                 }
688                 server->secMode &=
689                         ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
690         } else if ((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) {
691                 /* signing required */
692                 cFYI(1, ("Must sign - secFlags 0x%x", secFlags));
693                 if ((server->secMode &
694                         (SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED)) == 0) {
695                         cERROR(1,
696                                 ("signing required but server lacks support"));
697                         rc = -EOPNOTSUPP;
698                 } else
699                         server->secMode |= SECMODE_SIGN_REQUIRED;
700         } else {
701                 /* signing optional ie CIFSSEC_MAY_SIGN */
702                 if ((server->secMode & SECMODE_SIGN_REQUIRED) == 0)
703                         server->secMode &=
704                                 ~(SECMODE_SIGN_ENABLED | SECMODE_SIGN_REQUIRED);
705         }
706
707 neg_err_exit:
708         cifs_buf_release(pSMB);
709
710         cFYI(1, ("negprot rc %d", rc));
711         return rc;
712 }
713
714 int
715 CIFSSMBTDis(const int xid, struct cifsTconInfo *tcon)
716 {
717         struct smb_hdr *smb_buffer;
718         int rc = 0;
719
720         cFYI(1, ("In tree disconnect"));
721
722         /* BB: do we need to check this? These should never be NULL. */
723         if ((tcon->ses == NULL) || (tcon->ses->server == NULL))
724                 return -EIO;
725
726         /*
727          * No need to return error on this operation if tid invalidated and
728          * closed on server already e.g. due to tcp session crashing. Also,
729          * the tcon is no longer on the list, so no need to take lock before
730          * checking this.
731          */
732         if (tcon->need_reconnect)
733                 return 0;
734
735         rc = small_smb_init(SMB_COM_TREE_DISCONNECT, 0, tcon,
736                             (void **)&smb_buffer);
737         if (rc)
738                 return rc;
739
740         rc = SendReceiveNoRsp(xid, tcon->ses, smb_buffer, 0);
741         if (rc)
742                 cFYI(1, ("Tree disconnect failed %d", rc));
743
744         /* No need to return error on this operation if tid invalidated and
745            closed on server already e.g. due to tcp session crashing */
746         if (rc == -EAGAIN)
747                 rc = 0;
748
749         return rc;
750 }
751
752 int
753 CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
754 {
755         LOGOFF_ANDX_REQ *pSMB;
756         int rc = 0;
757
758         cFYI(1, ("In SMBLogoff for session disconnect"));
759
760         /*
761          * BB: do we need to check validity of ses and server? They should
762          * always be valid since we have an active reference. If not, that
763          * should probably be a BUG()
764          */
765         if (!ses || !ses->server)
766                 return -EIO;
767
768         down(&ses->sesSem);
769         if (ses->need_reconnect)
770                 goto session_already_dead; /* no need to send SMBlogoff if uid
771                                               already closed due to reconnect */
772         rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
773         if (rc) {
774                 up(&ses->sesSem);
775                 return rc;
776         }
777
778         pSMB->hdr.Mid = GetNextMid(ses->server);
779
780         if (ses->server->secMode &
781                    (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
782                         pSMB->hdr.Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
783
784         pSMB->hdr.Uid = ses->Suid;
785
786         pSMB->AndXCommand = 0xFF;
787         rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0);
788 session_already_dead:
789         up(&ses->sesSem);
790
791         /* if session dead then we do not need to do ulogoff,
792                 since server closed smb session, no sense reporting
793                 error */
794         if (rc == -EAGAIN)
795                 rc = 0;
796         return rc;
797 }
798
799 int
800 CIFSPOSIXDelFile(const int xid, struct cifsTconInfo *tcon, const char *fileName,
801                  __u16 type, const struct nls_table *nls_codepage, int remap)
802 {
803         TRANSACTION2_SPI_REQ *pSMB = NULL;
804         TRANSACTION2_SPI_RSP *pSMBr = NULL;
805         struct unlink_psx_rq *pRqD;
806         int name_len;
807         int rc = 0;
808         int bytes_returned = 0;
809         __u16 params, param_offset, offset, byte_count;
810
811         cFYI(1, ("In POSIX delete"));
812 PsxDelete:
813         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
814                       (void **) &pSMBr);
815         if (rc)
816                 return rc;
817
818         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
819                 name_len =
820                     cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
821                                      PATH_MAX, nls_codepage, remap);
822                 name_len++;     /* trailing null */
823                 name_len *= 2;
824         } else { /* BB add path length overrun check */
825                 name_len = strnlen(fileName, PATH_MAX);
826                 name_len++;     /* trailing null */
827                 strncpy(pSMB->FileName, fileName, name_len);
828         }
829
830         params = 6 + name_len;
831         pSMB->MaxParameterCount = cpu_to_le16(2);
832         pSMB->MaxDataCount = 0; /* BB double check this with jra */
833         pSMB->MaxSetupCount = 0;
834         pSMB->Reserved = 0;
835         pSMB->Flags = 0;
836         pSMB->Timeout = 0;
837         pSMB->Reserved2 = 0;
838         param_offset = offsetof(struct smb_com_transaction2_spi_req,
839                                 InformationLevel) - 4;
840         offset = param_offset + params;
841
842         /* Setup pointer to Request Data (inode type) */
843         pRqD = (struct unlink_psx_rq *)(((char *)&pSMB->hdr.Protocol) + offset);
844         pRqD->type = cpu_to_le16(type);
845         pSMB->ParameterOffset = cpu_to_le16(param_offset);
846         pSMB->DataOffset = cpu_to_le16(offset);
847         pSMB->SetupCount = 1;
848         pSMB->Reserved3 = 0;
849         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
850         byte_count = 3 /* pad */  + params + sizeof(struct unlink_psx_rq);
851
852         pSMB->DataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
853         pSMB->TotalDataCount = cpu_to_le16(sizeof(struct unlink_psx_rq));
854         pSMB->ParameterCount = cpu_to_le16(params);
855         pSMB->TotalParameterCount = pSMB->ParameterCount;
856         pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_UNLINK);
857         pSMB->Reserved4 = 0;
858         pSMB->hdr.smb_buf_length += byte_count;
859         pSMB->ByteCount = cpu_to_le16(byte_count);
860         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
861                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
862         if (rc)
863                 cFYI(1, ("Posix delete returned %d", rc));
864         cifs_buf_release(pSMB);
865
866         cifs_stats_inc(&tcon->num_deletes);
867
868         if (rc == -EAGAIN)
869                 goto PsxDelete;
870
871         return rc;
872 }
873
874 int
875 CIFSSMBDelFile(const int xid, struct cifsTconInfo *tcon, const char *fileName,
876                const struct nls_table *nls_codepage, int remap)
877 {
878         DELETE_FILE_REQ *pSMB = NULL;
879         DELETE_FILE_RSP *pSMBr = NULL;
880         int rc = 0;
881         int bytes_returned;
882         int name_len;
883
884 DelFileRetry:
885         rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB,
886                       (void **) &pSMBr);
887         if (rc)
888                 return rc;
889
890         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
891                 name_len =
892                     cifsConvertToUCS((__le16 *) pSMB->fileName, fileName,
893                                      PATH_MAX, nls_codepage, remap);
894                 name_len++;     /* trailing null */
895                 name_len *= 2;
896         } else {                /* BB improve check for buffer overruns BB */
897                 name_len = strnlen(fileName, PATH_MAX);
898                 name_len++;     /* trailing null */
899                 strncpy(pSMB->fileName, fileName, name_len);
900         }
901         pSMB->SearchAttributes =
902             cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM);
903         pSMB->BufferFormat = 0x04;
904         pSMB->hdr.smb_buf_length += name_len + 1;
905         pSMB->ByteCount = cpu_to_le16(name_len + 1);
906         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
907                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
908         cifs_stats_inc(&tcon->num_deletes);
909         if (rc)
910                 cFYI(1, ("Error in RMFile = %d", rc));
911
912         cifs_buf_release(pSMB);
913         if (rc == -EAGAIN)
914                 goto DelFileRetry;
915
916         return rc;
917 }
918
919 int
920 CIFSSMBRmDir(const int xid, struct cifsTconInfo *tcon, const char *dirName,
921              const struct nls_table *nls_codepage, int remap)
922 {
923         DELETE_DIRECTORY_REQ *pSMB = NULL;
924         DELETE_DIRECTORY_RSP *pSMBr = NULL;
925         int rc = 0;
926         int bytes_returned;
927         int name_len;
928
929         cFYI(1, ("In CIFSSMBRmDir"));
930 RmDirRetry:
931         rc = smb_init(SMB_COM_DELETE_DIRECTORY, 0, tcon, (void **) &pSMB,
932                       (void **) &pSMBr);
933         if (rc)
934                 return rc;
935
936         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
937                 name_len = cifsConvertToUCS((__le16 *) pSMB->DirName, dirName,
938                                          PATH_MAX, nls_codepage, remap);
939                 name_len++;     /* trailing null */
940                 name_len *= 2;
941         } else {                /* BB improve check for buffer overruns BB */
942                 name_len = strnlen(dirName, PATH_MAX);
943                 name_len++;     /* trailing null */
944                 strncpy(pSMB->DirName, dirName, name_len);
945         }
946
947         pSMB->BufferFormat = 0x04;
948         pSMB->hdr.smb_buf_length += name_len + 1;
949         pSMB->ByteCount = cpu_to_le16(name_len + 1);
950         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
951                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
952         cifs_stats_inc(&tcon->num_rmdirs);
953         if (rc)
954                 cFYI(1, ("Error in RMDir = %d", rc));
955
956         cifs_buf_release(pSMB);
957         if (rc == -EAGAIN)
958                 goto RmDirRetry;
959         return rc;
960 }
961
962 int
963 CIFSSMBMkDir(const int xid, struct cifsTconInfo *tcon,
964              const char *name, const struct nls_table *nls_codepage, int remap)
965 {
966         int rc = 0;
967         CREATE_DIRECTORY_REQ *pSMB = NULL;
968         CREATE_DIRECTORY_RSP *pSMBr = NULL;
969         int bytes_returned;
970         int name_len;
971
972         cFYI(1, ("In CIFSSMBMkDir"));
973 MkDirRetry:
974         rc = smb_init(SMB_COM_CREATE_DIRECTORY, 0, tcon, (void **) &pSMB,
975                       (void **) &pSMBr);
976         if (rc)
977                 return rc;
978
979         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
980                 name_len = cifsConvertToUCS((__le16 *) pSMB->DirName, name,
981                                             PATH_MAX, nls_codepage, remap);
982                 name_len++;     /* trailing null */
983                 name_len *= 2;
984         } else {                /* BB improve check for buffer overruns BB */
985                 name_len = strnlen(name, PATH_MAX);
986                 name_len++;     /* trailing null */
987                 strncpy(pSMB->DirName, name, name_len);
988         }
989
990         pSMB->BufferFormat = 0x04;
991         pSMB->hdr.smb_buf_length += name_len + 1;
992         pSMB->ByteCount = cpu_to_le16(name_len + 1);
993         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
994                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
995         cifs_stats_inc(&tcon->num_mkdirs);
996         if (rc)
997                 cFYI(1, ("Error in Mkdir = %d", rc));
998
999         cifs_buf_release(pSMB);
1000         if (rc == -EAGAIN)
1001                 goto MkDirRetry;
1002         return rc;
1003 }
1004
1005 int
1006 CIFSPOSIXCreate(const int xid, struct cifsTconInfo *tcon, __u32 posix_flags,
1007                 __u64 mode, __u16 *netfid, FILE_UNIX_BASIC_INFO *pRetData,
1008                 __u32 *pOplock, const char *name,
1009                 const struct nls_table *nls_codepage, int remap)
1010 {
1011         TRANSACTION2_SPI_REQ *pSMB = NULL;
1012         TRANSACTION2_SPI_RSP *pSMBr = NULL;
1013         int name_len;
1014         int rc = 0;
1015         int bytes_returned = 0;
1016         __u16 params, param_offset, offset, byte_count, count;
1017         OPEN_PSX_REQ *pdata;
1018         OPEN_PSX_RSP *psx_rsp;
1019
1020         cFYI(1, ("In POSIX Create"));
1021 PsxCreat:
1022         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
1023                       (void **) &pSMBr);
1024         if (rc)
1025                 return rc;
1026
1027         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1028                 name_len =
1029                     cifsConvertToUCS((__le16 *) pSMB->FileName, name,
1030                                      PATH_MAX, nls_codepage, remap);
1031                 name_len++;     /* trailing null */
1032                 name_len *= 2;
1033         } else {        /* BB improve the check for buffer overruns BB */
1034                 name_len = strnlen(name, PATH_MAX);
1035                 name_len++;     /* trailing null */
1036                 strncpy(pSMB->FileName, name, name_len);
1037         }
1038
1039         params = 6 + name_len;
1040         count = sizeof(OPEN_PSX_REQ);
1041         pSMB->MaxParameterCount = cpu_to_le16(2);
1042         pSMB->MaxDataCount = cpu_to_le16(1000); /* large enough */
1043         pSMB->MaxSetupCount = 0;
1044         pSMB->Reserved = 0;
1045         pSMB->Flags = 0;
1046         pSMB->Timeout = 0;
1047         pSMB->Reserved2 = 0;
1048         param_offset = offsetof(struct smb_com_transaction2_spi_req,
1049                                 InformationLevel) - 4;
1050         offset = param_offset + params;
1051         pdata = (OPEN_PSX_REQ *)(((char *)&pSMB->hdr.Protocol) + offset);
1052         pdata->Level = cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC);
1053         pdata->Permissions = cpu_to_le64(mode);
1054         pdata->PosixOpenFlags = cpu_to_le32(posix_flags);
1055         pdata->OpenFlags =  cpu_to_le32(*pOplock);
1056         pSMB->ParameterOffset = cpu_to_le16(param_offset);
1057         pSMB->DataOffset = cpu_to_le16(offset);
1058         pSMB->SetupCount = 1;
1059         pSMB->Reserved3 = 0;
1060         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
1061         byte_count = 3 /* pad */  + params + count;
1062
1063         pSMB->DataCount = cpu_to_le16(count);
1064         pSMB->ParameterCount = cpu_to_le16(params);
1065         pSMB->TotalDataCount = pSMB->DataCount;
1066         pSMB->TotalParameterCount = pSMB->ParameterCount;
1067         pSMB->InformationLevel = cpu_to_le16(SMB_POSIX_OPEN);
1068         pSMB->Reserved4 = 0;
1069         pSMB->hdr.smb_buf_length += byte_count;
1070         pSMB->ByteCount = cpu_to_le16(byte_count);
1071         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1072                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1073         if (rc) {
1074                 cFYI(1, ("Posix create returned %d", rc));
1075                 goto psx_create_err;
1076         }
1077
1078         cFYI(1, ("copying inode info"));
1079         rc = validate_t2((struct smb_t2_rsp *)pSMBr);
1080
1081         if (rc || (pSMBr->ByteCount < sizeof(OPEN_PSX_RSP))) {
1082                 rc = -EIO;      /* bad smb */
1083                 goto psx_create_err;
1084         }
1085
1086         /* copy return information to pRetData */
1087         psx_rsp = (OPEN_PSX_RSP *)((char *) &pSMBr->hdr.Protocol
1088                         + le16_to_cpu(pSMBr->t2.DataOffset));
1089
1090         *pOplock = le16_to_cpu(psx_rsp->OplockFlags);
1091         if (netfid)
1092                 *netfid = psx_rsp->Fid;   /* cifs fid stays in le */
1093         /* Let caller know file was created so we can set the mode. */
1094         /* Do we care about the CreateAction in any other cases? */
1095         if (cpu_to_le32(FILE_CREATE) == psx_rsp->CreateAction)
1096                 *pOplock |= CIFS_CREATE_ACTION;
1097         /* check to make sure response data is there */
1098         if (psx_rsp->ReturnedLevel != cpu_to_le16(SMB_QUERY_FILE_UNIX_BASIC)) {
1099                 pRetData->Type = cpu_to_le32(-1); /* unknown */
1100                 cFYI(DBG2, ("unknown type"));
1101         } else {
1102                 if (pSMBr->ByteCount < sizeof(OPEN_PSX_RSP)
1103                                         + sizeof(FILE_UNIX_BASIC_INFO)) {
1104                         cERROR(1, ("Open response data too small"));
1105                         pRetData->Type = cpu_to_le32(-1);
1106                         goto psx_create_err;
1107                 }
1108                 memcpy((char *) pRetData,
1109                         (char *)psx_rsp + sizeof(OPEN_PSX_RSP),
1110                         sizeof(FILE_UNIX_BASIC_INFO));
1111         }
1112
1113 psx_create_err:
1114         cifs_buf_release(pSMB);
1115
1116         cifs_stats_inc(&tcon->num_mkdirs);
1117
1118         if (rc == -EAGAIN)
1119                 goto PsxCreat;
1120
1121         return rc;
1122 }
1123
1124 static __u16 convert_disposition(int disposition)
1125 {
1126         __u16 ofun = 0;
1127
1128         switch (disposition) {
1129                 case FILE_SUPERSEDE:
1130                         ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
1131                         break;
1132                 case FILE_OPEN:
1133                         ofun = SMBOPEN_OAPPEND;
1134                         break;
1135                 case FILE_CREATE:
1136                         ofun = SMBOPEN_OCREATE;
1137                         break;
1138                 case FILE_OPEN_IF:
1139                         ofun = SMBOPEN_OCREATE | SMBOPEN_OAPPEND;
1140                         break;
1141                 case FILE_OVERWRITE:
1142                         ofun = SMBOPEN_OTRUNC;
1143                         break;
1144                 case FILE_OVERWRITE_IF:
1145                         ofun = SMBOPEN_OCREATE | SMBOPEN_OTRUNC;
1146                         break;
1147                 default:
1148                         cFYI(1, ("unknown disposition %d", disposition));
1149                         ofun =  SMBOPEN_OAPPEND; /* regular open */
1150         }
1151         return ofun;
1152 }
1153
1154 static int
1155 access_flags_to_smbopen_mode(const int access_flags)
1156 {
1157         int masked_flags = access_flags & (GENERIC_READ | GENERIC_WRITE);
1158
1159         if (masked_flags == GENERIC_READ)
1160                 return SMBOPEN_READ;
1161         else if (masked_flags == GENERIC_WRITE)
1162                 return SMBOPEN_WRITE;
1163
1164         /* just go for read/write */
1165         return SMBOPEN_READWRITE;
1166 }
1167
1168 int
1169 SMBLegacyOpen(const int xid, struct cifsTconInfo *tcon,
1170             const char *fileName, const int openDisposition,
1171             const int access_flags, const int create_options, __u16 *netfid,
1172             int *pOplock, FILE_ALL_INFO *pfile_info,
1173             const struct nls_table *nls_codepage, int remap)
1174 {
1175         int rc = -EACCES;
1176         OPENX_REQ *pSMB = NULL;
1177         OPENX_RSP *pSMBr = NULL;
1178         int bytes_returned;
1179         int name_len;
1180         __u16 count;
1181
1182 OldOpenRetry:
1183         rc = smb_init(SMB_COM_OPEN_ANDX, 15, tcon, (void **) &pSMB,
1184                       (void **) &pSMBr);
1185         if (rc)
1186                 return rc;
1187
1188         pSMB->AndXCommand = 0xFF;       /* none */
1189
1190         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1191                 count = 1;      /* account for one byte pad to word boundary */
1192                 name_len =
1193                    cifsConvertToUCS((__le16 *) (pSMB->fileName + 1),
1194                                     fileName, PATH_MAX, nls_codepage, remap);
1195                 name_len++;     /* trailing null */
1196                 name_len *= 2;
1197         } else {                /* BB improve check for buffer overruns BB */
1198                 count = 0;      /* no pad */
1199                 name_len = strnlen(fileName, PATH_MAX);
1200                 name_len++;     /* trailing null */
1201                 strncpy(pSMB->fileName, fileName, name_len);
1202         }
1203         if (*pOplock & REQ_OPLOCK)
1204                 pSMB->OpenFlags = cpu_to_le16(REQ_OPLOCK);
1205         else if (*pOplock & REQ_BATCHOPLOCK)
1206                 pSMB->OpenFlags = cpu_to_le16(REQ_BATCHOPLOCK);
1207
1208         pSMB->OpenFlags |= cpu_to_le16(REQ_MORE_INFO);
1209         pSMB->Mode = cpu_to_le16(access_flags_to_smbopen_mode(access_flags));
1210         pSMB->Mode |= cpu_to_le16(0x40); /* deny none */
1211         /* set file as system file if special file such
1212            as fifo and server expecting SFU style and
1213            no Unix extensions */
1214
1215         if (create_options & CREATE_OPTION_SPECIAL)
1216                 pSMB->FileAttributes = cpu_to_le16(ATTR_SYSTEM);
1217         else /* BB FIXME BB */
1218                 pSMB->FileAttributes = cpu_to_le16(0/*ATTR_NORMAL*/);
1219
1220         if (create_options & CREATE_OPTION_READONLY)
1221                 pSMB->FileAttributes |= cpu_to_le16(ATTR_READONLY);
1222
1223         /* BB FIXME BB */
1224 /*      pSMB->CreateOptions = cpu_to_le32(create_options &
1225                                                  CREATE_OPTIONS_MASK); */
1226         /* BB FIXME END BB */
1227
1228         pSMB->Sattr = cpu_to_le16(ATTR_HIDDEN | ATTR_SYSTEM | ATTR_DIRECTORY);
1229         pSMB->OpenFunction = cpu_to_le16(convert_disposition(openDisposition));
1230         count += name_len;
1231         pSMB->hdr.smb_buf_length += count;
1232
1233         pSMB->ByteCount = cpu_to_le16(count);
1234         /* long_op set to 1 to allow for oplock break timeouts */
1235         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1236                         (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
1237         cifs_stats_inc(&tcon->num_opens);
1238         if (rc) {
1239                 cFYI(1, ("Error in Open = %d", rc));
1240         } else {
1241         /* BB verify if wct == 15 */
1242
1243 /*              *pOplock = pSMBr->OplockLevel; */ /* BB take from action field*/
1244
1245                 *netfid = pSMBr->Fid;   /* cifs fid stays in le */
1246                 /* Let caller know file was created so we can set the mode. */
1247                 /* Do we care about the CreateAction in any other cases? */
1248         /* BB FIXME BB */
1249 /*              if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
1250                         *pOplock |= CIFS_CREATE_ACTION; */
1251         /* BB FIXME END */
1252
1253                 if (pfile_info) {
1254                         pfile_info->CreationTime = 0; /* BB convert CreateTime*/
1255                         pfile_info->LastAccessTime = 0; /* BB fixme */
1256                         pfile_info->LastWriteTime = 0; /* BB fixme */
1257                         pfile_info->ChangeTime = 0;  /* BB fixme */
1258                         pfile_info->Attributes =
1259                                 cpu_to_le32(le16_to_cpu(pSMBr->FileAttributes));
1260                         /* the file_info buf is endian converted by caller */
1261                         pfile_info->AllocationSize =
1262                                 cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
1263                         pfile_info->EndOfFile = pfile_info->AllocationSize;
1264                         pfile_info->NumberOfLinks = cpu_to_le32(1);
1265                         pfile_info->DeletePending = 0;
1266                 }
1267         }
1268
1269         cifs_buf_release(pSMB);
1270         if (rc == -EAGAIN)
1271                 goto OldOpenRetry;
1272         return rc;
1273 }
1274
1275 int
1276 CIFSSMBOpen(const int xid, struct cifsTconInfo *tcon,
1277             const char *fileName, const int openDisposition,
1278             const int access_flags, const int create_options, __u16 *netfid,
1279             int *pOplock, FILE_ALL_INFO *pfile_info,
1280             const struct nls_table *nls_codepage, int remap)
1281 {
1282         int rc = -EACCES;
1283         OPEN_REQ *pSMB = NULL;
1284         OPEN_RSP *pSMBr = NULL;
1285         int bytes_returned;
1286         int name_len;
1287         __u16 count;
1288
1289 openRetry:
1290         rc = smb_init(SMB_COM_NT_CREATE_ANDX, 24, tcon, (void **) &pSMB,
1291                       (void **) &pSMBr);
1292         if (rc)
1293                 return rc;
1294
1295         pSMB->AndXCommand = 0xFF;       /* none */
1296
1297         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1298                 count = 1;      /* account for one byte pad to word boundary */
1299                 name_len =
1300                     cifsConvertToUCS((__le16 *) (pSMB->fileName + 1),
1301                                      fileName, PATH_MAX, nls_codepage, remap);
1302                 name_len++;     /* trailing null */
1303                 name_len *= 2;
1304                 pSMB->NameLength = cpu_to_le16(name_len);
1305         } else {                /* BB improve check for buffer overruns BB */
1306                 count = 0;      /* no pad */
1307                 name_len = strnlen(fileName, PATH_MAX);
1308                 name_len++;     /* trailing null */
1309                 pSMB->NameLength = cpu_to_le16(name_len);
1310                 strncpy(pSMB->fileName, fileName, name_len);
1311         }
1312         if (*pOplock & REQ_OPLOCK)
1313                 pSMB->OpenFlags = cpu_to_le32(REQ_OPLOCK);
1314         else if (*pOplock & REQ_BATCHOPLOCK)
1315                 pSMB->OpenFlags = cpu_to_le32(REQ_BATCHOPLOCK);
1316         pSMB->DesiredAccess = cpu_to_le32(access_flags);
1317         pSMB->AllocationSize = 0;
1318         /* set file as system file if special file such
1319            as fifo and server expecting SFU style and
1320            no Unix extensions */
1321         if (create_options & CREATE_OPTION_SPECIAL)
1322                 pSMB->FileAttributes = cpu_to_le32(ATTR_SYSTEM);
1323         else
1324                 pSMB->FileAttributes = cpu_to_le32(ATTR_NORMAL);
1325
1326         /* XP does not handle ATTR_POSIX_SEMANTICS */
1327         /* but it helps speed up case sensitive checks for other
1328         servers such as Samba */
1329         if (tcon->ses->capabilities & CAP_UNIX)
1330                 pSMB->FileAttributes |= cpu_to_le32(ATTR_POSIX_SEMANTICS);
1331
1332         if (create_options & CREATE_OPTION_READONLY)
1333                 pSMB->FileAttributes |= cpu_to_le32(ATTR_READONLY);
1334
1335         pSMB->ShareAccess = cpu_to_le32(FILE_SHARE_ALL);
1336         pSMB->CreateDisposition = cpu_to_le32(openDisposition);
1337         pSMB->CreateOptions = cpu_to_le32(create_options & CREATE_OPTIONS_MASK);
1338         /* BB Expirement with various impersonation levels and verify */
1339         pSMB->ImpersonationLevel = cpu_to_le32(SECURITY_IMPERSONATION);
1340         pSMB->SecurityFlags =
1341             SECURITY_CONTEXT_TRACKING | SECURITY_EFFECTIVE_ONLY;
1342
1343         count += name_len;
1344         pSMB->hdr.smb_buf_length += count;
1345
1346         pSMB->ByteCount = cpu_to_le16(count);
1347         /* long_op set to 1 to allow for oplock break timeouts */
1348         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1349                         (struct smb_hdr *)pSMBr, &bytes_returned, CIFS_LONG_OP);
1350         cifs_stats_inc(&tcon->num_opens);
1351         if (rc) {
1352                 cFYI(1, ("Error in Open = %d", rc));
1353         } else {
1354                 *pOplock = pSMBr->OplockLevel; /* 1 byte no need to le_to_cpu */
1355                 *netfid = pSMBr->Fid;   /* cifs fid stays in le */
1356                 /* Let caller know file was created so we can set the mode. */
1357                 /* Do we care about the CreateAction in any other cases? */
1358                 if (cpu_to_le32(FILE_CREATE) == pSMBr->CreateAction)
1359                         *pOplock |= CIFS_CREATE_ACTION;
1360                 if (pfile_info) {
1361                         memcpy((char *)pfile_info, (char *)&pSMBr->CreationTime,
1362                                 36 /* CreationTime to Attributes */);
1363                         /* the file_info buf is endian converted by caller */
1364                         pfile_info->AllocationSize = pSMBr->AllocationSize;
1365                         pfile_info->EndOfFile = pSMBr->EndOfFile;
1366                         pfile_info->NumberOfLinks = cpu_to_le32(1);
1367                         pfile_info->DeletePending = 0;
1368                 }
1369         }
1370
1371         cifs_buf_release(pSMB);
1372         if (rc == -EAGAIN)
1373                 goto openRetry;
1374         return rc;
1375 }
1376
1377 int
1378 CIFSSMBRead(const int xid, struct cifsTconInfo *tcon, const int netfid,
1379             const unsigned int count, const __u64 lseek, unsigned int *nbytes,
1380             char **buf, int *pbuf_type)
1381 {
1382         int rc = -EACCES;
1383         READ_REQ *pSMB = NULL;
1384         READ_RSP *pSMBr = NULL;
1385         char *pReadData = NULL;
1386         int wct;
1387         int resp_buf_type = 0;
1388         struct kvec iov[1];
1389
1390         cFYI(1, ("Reading %d bytes on fid %d", count, netfid));
1391         if (tcon->ses->capabilities & CAP_LARGE_FILES)
1392                 wct = 12;
1393         else {
1394                 wct = 10; /* old style read */
1395                 if ((lseek >> 32) > 0)  {
1396                         /* can not handle this big offset for old */
1397                         return -EIO;
1398                 }
1399         }
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
1416         pSMB->Remaining = 0;
1417         pSMB->MaxCount = cpu_to_le16(count & 0xFFFF);
1418         pSMB->MaxCountHigh = cpu_to_le32(count >> 16);
1419         if (wct == 12)
1420                 pSMB->ByteCount = 0;  /* no need to do le conversion since 0 */
1421         else {
1422                 /* old style read */
1423                 struct smb_com_readx_req *pSMBW =
1424                         (struct smb_com_readx_req *)pSMB;
1425                 pSMBW->ByteCount = 0;
1426         }
1427
1428         iov[0].iov_base = (char *)pSMB;
1429         iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
1430         rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
1431                          &resp_buf_type, CIFS_STD_OP | CIFS_LOG_ERROR);
1432         cifs_stats_inc(&tcon->num_reads);
1433         pSMBr = (READ_RSP *)iov[0].iov_base;
1434         if (rc) {
1435                 cERROR(1, ("Send error in read = %d", rc));
1436         } else {
1437                 int data_length = le16_to_cpu(pSMBr->DataLengthHigh);
1438                 data_length = data_length << 16;
1439                 data_length += le16_to_cpu(pSMBr->DataLength);
1440                 *nbytes = data_length;
1441
1442                 /*check that DataLength would not go beyond end of SMB */
1443                 if ((data_length > CIFSMaxBufSize)
1444                                 || (data_length > count)) {
1445                         cFYI(1, ("bad length %d for count %d",
1446                                  data_length, count));
1447                         rc = -EIO;
1448                         *nbytes = 0;
1449                 } else {
1450                         pReadData = (char *) (&pSMBr->hdr.Protocol) +
1451                                         le16_to_cpu(pSMBr->DataOffset);
1452 /*                      if (rc = copy_to_user(buf, pReadData, data_length)) {
1453                                 cERROR(1,("Faulting on read rc = %d",rc));
1454                                 rc = -EFAULT;
1455                         }*/ /* can not use copy_to_user when using page cache*/
1456                         if (*buf)
1457                                 memcpy(*buf, pReadData, data_length);
1458                 }
1459         }
1460
1461 /*      cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
1462         if (*buf) {
1463                 if (resp_buf_type == CIFS_SMALL_BUFFER)
1464                         cifs_small_buf_release(iov[0].iov_base);
1465                 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1466                         cifs_buf_release(iov[0].iov_base);
1467         } else if (resp_buf_type != CIFS_NO_BUFFER) {
1468                 /* return buffer to caller to free */
1469                 *buf = iov[0].iov_base;
1470                 if (resp_buf_type == CIFS_SMALL_BUFFER)
1471                         *pbuf_type = CIFS_SMALL_BUFFER;
1472                 else if (resp_buf_type == CIFS_LARGE_BUFFER)
1473                         *pbuf_type = CIFS_LARGE_BUFFER;
1474         } /* else no valid buffer on return - leave as null */
1475
1476         /* Note: On -EAGAIN error only caller can retry on handle based calls
1477                 since file handle passed in no longer valid */
1478         return rc;
1479 }
1480
1481
1482 int
1483 CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
1484              const int netfid, const unsigned int count,
1485              const __u64 offset, unsigned int *nbytes, const char *buf,
1486              const char __user *ubuf, const int long_op)
1487 {
1488         int rc = -EACCES;
1489         WRITE_REQ *pSMB = NULL;
1490         WRITE_RSP *pSMBr = NULL;
1491         int bytes_returned, wct;
1492         __u32 bytes_sent;
1493         __u16 byte_count;
1494
1495         /* cFYI(1, ("write at %lld %d bytes", offset, count));*/
1496         if (tcon->ses == NULL)
1497                 return -ECONNABORTED;
1498
1499         if (tcon->ses->capabilities & CAP_LARGE_FILES)
1500                 wct = 14;
1501         else {
1502                 wct = 12;
1503                 if ((offset >> 32) > 0) {
1504                         /* can not handle big offset for old srv */
1505                         return -EIO;
1506                 }
1507         }
1508
1509         rc = smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB,
1510                       (void **) &pSMBr);
1511         if (rc)
1512                 return rc;
1513         /* tcon and ses pointer are checked in smb_init */
1514         if (tcon->ses->server == NULL)
1515                 return -ECONNABORTED;
1516
1517         pSMB->AndXCommand = 0xFF;       /* none */
1518         pSMB->Fid = netfid;
1519         pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
1520         if (wct == 14)
1521                 pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
1522
1523         pSMB->Reserved = 0xFFFFFFFF;
1524         pSMB->WriteMode = 0;
1525         pSMB->Remaining = 0;
1526
1527         /* Can increase buffer size if buffer is big enough in some cases ie we
1528         can send more if LARGE_WRITE_X capability returned by the server and if
1529         our buffer is big enough or if we convert to iovecs on socket writes
1530         and eliminate the copy to the CIFS buffer */
1531         if (tcon->ses->capabilities & CAP_LARGE_WRITE_X) {
1532                 bytes_sent = min_t(const unsigned int, CIFSMaxBufSize, count);
1533         } else {
1534                 bytes_sent = (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)
1535                          & ~0xFF;
1536         }
1537
1538         if (bytes_sent > count)
1539                 bytes_sent = count;
1540         pSMB->DataOffset =
1541                 cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
1542         if (buf)
1543                 memcpy(pSMB->Data, buf, bytes_sent);
1544         else if (ubuf) {
1545                 if (copy_from_user(pSMB->Data, ubuf, bytes_sent)) {
1546                         cifs_buf_release(pSMB);
1547                         return -EFAULT;
1548                 }
1549         } else if (count != 0) {
1550                 /* No buffer */
1551                 cifs_buf_release(pSMB);
1552                 return -EINVAL;
1553         } /* else setting file size with write of zero bytes */
1554         if (wct == 14)
1555                 byte_count = bytes_sent + 1; /* pad */
1556         else /* wct == 12 */
1557                 byte_count = bytes_sent + 5; /* bigger pad, smaller smb hdr */
1558
1559         pSMB->DataLengthLow = cpu_to_le16(bytes_sent & 0xFFFF);
1560         pSMB->DataLengthHigh = cpu_to_le16(bytes_sent >> 16);
1561         pSMB->hdr.smb_buf_length += byte_count;
1562
1563         if (wct == 14)
1564                 pSMB->ByteCount = cpu_to_le16(byte_count);
1565         else { /* old style write has byte count 4 bytes earlier
1566                   so 4 bytes pad  */
1567                 struct smb_com_writex_req *pSMBW =
1568                         (struct smb_com_writex_req *)pSMB;
1569                 pSMBW->ByteCount = cpu_to_le16(byte_count);
1570         }
1571
1572         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1573                          (struct smb_hdr *) pSMBr, &bytes_returned, long_op);
1574         cifs_stats_inc(&tcon->num_writes);
1575         if (rc) {
1576                 cFYI(1, ("Send error in write = %d", rc));
1577                 *nbytes = 0;
1578         } else {
1579                 *nbytes = le16_to_cpu(pSMBr->CountHigh);
1580                 *nbytes = (*nbytes) << 16;
1581                 *nbytes += le16_to_cpu(pSMBr->Count);
1582         }
1583
1584         cifs_buf_release(pSMB);
1585
1586         /* Note: On -EAGAIN error only caller can retry on handle based calls
1587                 since file handle passed in no longer valid */
1588
1589         return rc;
1590 }
1591
1592 int
1593 CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
1594              const int netfid, const unsigned int count,
1595              const __u64 offset, unsigned int *nbytes, struct kvec *iov,
1596              int n_vec, const int long_op)
1597 {
1598         int rc = -EACCES;
1599         WRITE_REQ *pSMB = NULL;
1600         int wct;
1601         int smb_hdr_len;
1602         int resp_buf_type = 0;
1603
1604         *nbytes = 0;
1605
1606         cFYI(1, ("write2 at %lld %d bytes", (long long)offset, count));
1607
1608         if (tcon->ses->capabilities & CAP_LARGE_FILES) {
1609                 wct = 14;
1610         } else {
1611                 wct = 12;
1612                 if ((offset >> 32) > 0) {
1613                         /* can not handle big offset for old srv */
1614                         return -EIO;
1615                 }
1616         }
1617         rc = small_smb_init(SMB_COM_WRITE_ANDX, wct, tcon, (void **) &pSMB);
1618         if (rc)
1619                 return rc;
1620         /* tcon and ses pointer are checked in smb_init */
1621         if (tcon->ses->server == NULL)
1622                 return -ECONNABORTED;
1623
1624         pSMB->AndXCommand = 0xFF;       /* none */
1625         pSMB->Fid = netfid;
1626         pSMB->OffsetLow = cpu_to_le32(offset & 0xFFFFFFFF);
1627         if (wct == 14)
1628                 pSMB->OffsetHigh = cpu_to_le32(offset >> 32);
1629         pSMB->Reserved = 0xFFFFFFFF;
1630         pSMB->WriteMode = 0;
1631         pSMB->Remaining = 0;
1632
1633         pSMB->DataOffset =
1634             cpu_to_le16(offsetof(struct smb_com_write_req, Data) - 4);
1635
1636         pSMB->DataLengthLow = cpu_to_le16(count & 0xFFFF);
1637         pSMB->DataLengthHigh = cpu_to_le16(count >> 16);
1638         smb_hdr_len = pSMB->hdr.smb_buf_length + 1; /* hdr + 1 byte pad */
1639         if (wct == 14)
1640                 pSMB->hdr.smb_buf_length += count+1;
1641         else /* wct == 12 */
1642                 pSMB->hdr.smb_buf_length += count+5; /* smb data starts later */
1643         if (wct == 14)
1644                 pSMB->ByteCount = cpu_to_le16(count + 1);
1645         else /* wct == 12 */ /* bigger pad, smaller smb hdr, keep offset ok */ {
1646                 struct smb_com_writex_req *pSMBW =
1647                                 (struct smb_com_writex_req *)pSMB;
1648                 pSMBW->ByteCount = cpu_to_le16(count + 5);
1649         }
1650         iov[0].iov_base = pSMB;
1651         if (wct == 14)
1652                 iov[0].iov_len = smb_hdr_len + 4;
1653         else /* wct == 12 pad bigger by four bytes */
1654                 iov[0].iov_len = smb_hdr_len + 8;
1655
1656
1657         rc = SendReceive2(xid, tcon->ses, iov, n_vec + 1, &resp_buf_type,
1658                           long_op);
1659         cifs_stats_inc(&tcon->num_writes);
1660         if (rc) {
1661                 cFYI(1, ("Send error Write2 = %d", rc));
1662         } else if (resp_buf_type == 0) {
1663                 /* presumably this can not happen, but best to be safe */
1664                 rc = -EIO;
1665         } else {
1666                 WRITE_RSP *pSMBr = (WRITE_RSP *)iov[0].iov_base;
1667                 *nbytes = le16_to_cpu(pSMBr->CountHigh);
1668                 *nbytes = (*nbytes) << 16;
1669                 *nbytes += le16_to_cpu(pSMBr->Count);
1670         }
1671
1672 /*      cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
1673         if (resp_buf_type == CIFS_SMALL_BUFFER)
1674                 cifs_small_buf_release(iov[0].iov_base);
1675         else if (resp_buf_type == CIFS_LARGE_BUFFER)
1676                 cifs_buf_release(iov[0].iov_base);
1677
1678         /* Note: On -EAGAIN error only caller can retry on handle based calls
1679                 since file handle passed in no longer valid */
1680
1681         return rc;
1682 }
1683
1684
1685 int
1686 CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
1687             const __u16 smb_file_id, const __u64 len,
1688             const __u64 offset, const __u32 numUnlock,
1689             const __u32 numLock, const __u8 lockType, const bool waitFlag)
1690 {
1691         int rc = 0;
1692         LOCK_REQ *pSMB = NULL;
1693 /*      LOCK_RSP *pSMBr = NULL; */ /* No response data other than rc to parse */
1694         int bytes_returned;
1695         int timeout = 0;
1696         __u16 count;
1697
1698         cFYI(1, ("CIFSSMBLock timeout %d numLock %d", (int)waitFlag, numLock));
1699         rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
1700
1701         if (rc)
1702                 return rc;
1703
1704         if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
1705                 timeout = CIFS_ASYNC_OP; /* no response expected */
1706                 pSMB->Timeout = 0;
1707         } else if (waitFlag) {
1708                 timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
1709                 pSMB->Timeout = cpu_to_le32(-1);/* blocking - do not time out */
1710         } else {
1711                 pSMB->Timeout = 0;
1712         }
1713
1714         pSMB->NumberOfLocks = cpu_to_le16(numLock);
1715         pSMB->NumberOfUnlocks = cpu_to_le16(numUnlock);
1716         pSMB->LockType = lockType;
1717         pSMB->AndXCommand = 0xFF;       /* none */
1718         pSMB->Fid = smb_file_id; /* netfid stays le */
1719
1720         if ((numLock != 0) || (numUnlock != 0)) {
1721                 pSMB->Locks[0].Pid = cpu_to_le16(current->tgid);
1722                 /* BB where to store pid high? */
1723                 pSMB->Locks[0].LengthLow = cpu_to_le32((u32)len);
1724                 pSMB->Locks[0].LengthHigh = cpu_to_le32((u32)(len>>32));
1725                 pSMB->Locks[0].OffsetLow = cpu_to_le32((u32)offset);
1726                 pSMB->Locks[0].OffsetHigh = cpu_to_le32((u32)(offset>>32));
1727                 count = sizeof(LOCKING_ANDX_RANGE);
1728         } else {
1729                 /* oplock break */
1730                 count = 0;
1731         }
1732         pSMB->hdr.smb_buf_length += count;
1733         pSMB->ByteCount = cpu_to_le16(count);
1734
1735         if (waitFlag) {
1736                 rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
1737                         (struct smb_hdr *) pSMB, &bytes_returned);
1738                 cifs_small_buf_release(pSMB);
1739         } else {
1740                 rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *)pSMB,
1741                                       timeout);
1742                 /* SMB buffer freed by function above */
1743         }
1744         cifs_stats_inc(&tcon->num_locks);
1745         if (rc)
1746                 cFYI(1, ("Send error in Lock = %d", rc));
1747
1748         /* Note: On -EAGAIN error only caller can retry on handle based calls
1749         since file handle passed in no longer valid */
1750         return rc;
1751 }
1752
1753 int
1754 CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
1755                 const __u16 smb_file_id, const int get_flag, const __u64 len,
1756                 struct file_lock *pLockData, const __u16 lock_type,
1757                 const bool waitFlag)
1758 {
1759         struct smb_com_transaction2_sfi_req *pSMB  = NULL;
1760         struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
1761         struct cifs_posix_lock *parm_data;
1762         int rc = 0;
1763         int timeout = 0;
1764         int bytes_returned = 0;
1765         int resp_buf_type = 0;
1766         __u16 params, param_offset, offset, byte_count, count;
1767         struct kvec iov[1];
1768
1769         cFYI(1, ("Posix Lock"));
1770
1771         if (pLockData == NULL)
1772                 return -EINVAL;
1773
1774         rc = small_smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB);
1775
1776         if (rc)
1777                 return rc;
1778
1779         pSMBr = (struct smb_com_transaction2_sfi_rsp *)pSMB;
1780
1781         params = 6;
1782         pSMB->MaxSetupCount = 0;
1783         pSMB->Reserved = 0;
1784         pSMB->Flags = 0;
1785         pSMB->Reserved2 = 0;
1786         param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
1787         offset = param_offset + params;
1788
1789         count = sizeof(struct cifs_posix_lock);
1790         pSMB->MaxParameterCount = cpu_to_le16(2);
1791         pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
1792         pSMB->SetupCount = 1;
1793         pSMB->Reserved3 = 0;
1794         if (get_flag)
1795                 pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
1796         else
1797                 pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
1798         byte_count = 3 /* pad */  + params + count;
1799         pSMB->DataCount = cpu_to_le16(count);
1800         pSMB->ParameterCount = cpu_to_le16(params);
1801         pSMB->TotalDataCount = pSMB->DataCount;
1802         pSMB->TotalParameterCount = pSMB->ParameterCount;
1803         pSMB->ParameterOffset = cpu_to_le16(param_offset);
1804         parm_data = (struct cifs_posix_lock *)
1805                         (((char *) &pSMB->hdr.Protocol) + offset);
1806
1807         parm_data->lock_type = cpu_to_le16(lock_type);
1808         if (waitFlag) {
1809                 timeout = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
1810                 parm_data->lock_flags = cpu_to_le16(1);
1811                 pSMB->Timeout = cpu_to_le32(-1);
1812         } else
1813                 pSMB->Timeout = 0;
1814
1815         parm_data->pid = cpu_to_le32(current->tgid);
1816         parm_data->start = cpu_to_le64(pLockData->fl_start);
1817         parm_data->length = cpu_to_le64(len);  /* normalize negative numbers */
1818
1819         pSMB->DataOffset = cpu_to_le16(offset);
1820         pSMB->Fid = smb_file_id;
1821         pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_LOCK);
1822         pSMB->Reserved4 = 0;
1823         pSMB->hdr.smb_buf_length += byte_count;
1824         pSMB->ByteCount = cpu_to_le16(byte_count);
1825         if (waitFlag) {
1826                 rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
1827                         (struct smb_hdr *) pSMBr, &bytes_returned);
1828         } else {
1829                 iov[0].iov_base = (char *)pSMB;
1830                 iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
1831                 rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovecs */,
1832                                 &resp_buf_type, timeout);
1833                 pSMB = NULL; /* request buf already freed by SendReceive2. Do
1834                                 not try to free it twice below on exit */
1835                 pSMBr = (struct smb_com_transaction2_sfi_rsp *)iov[0].iov_base;
1836         }
1837
1838         if (rc) {
1839                 cFYI(1, ("Send error in Posix Lock = %d", rc));
1840         } else if (get_flag) {
1841                 /* lock structure can be returned on get */
1842                 __u16 data_offset;
1843                 __u16 data_count;
1844                 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
1845
1846                 if (rc || (pSMBr->ByteCount < sizeof(struct cifs_posix_lock))) {
1847                         rc = -EIO;      /* bad smb */
1848                         goto plk_err_exit;
1849                 }
1850                 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
1851                 data_count  = le16_to_cpu(pSMBr->t2.DataCount);
1852                 if (data_count < sizeof(struct cifs_posix_lock)) {
1853                         rc = -EIO;
1854                         goto plk_err_exit;
1855                 }
1856                 parm_data = (struct cifs_posix_lock *)
1857                         ((char *)&pSMBr->hdr.Protocol + data_offset);
1858                 if (parm_data->lock_type == cpu_to_le16(CIFS_UNLCK))
1859                         pLockData->fl_type = F_UNLCK;
1860         }
1861
1862 plk_err_exit:
1863         if (pSMB)
1864                 cifs_small_buf_release(pSMB);
1865
1866         if (resp_buf_type == CIFS_SMALL_BUFFER)
1867                 cifs_small_buf_release(iov[0].iov_base);
1868         else if (resp_buf_type == CIFS_LARGE_BUFFER)
1869                 cifs_buf_release(iov[0].iov_base);
1870
1871         /* Note: On -EAGAIN error only caller can retry on handle based calls
1872            since file handle passed in no longer valid */
1873
1874         return rc;
1875 }
1876
1877
1878 int
1879 CIFSSMBClose(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
1880 {
1881         int rc = 0;
1882         CLOSE_REQ *pSMB = NULL;
1883         cFYI(1, ("In CIFSSMBClose"));
1884
1885 /* do not retry on dead session on close */
1886         rc = small_smb_init(SMB_COM_CLOSE, 3, tcon, (void **) &pSMB);
1887         if (rc == -EAGAIN)
1888                 return 0;
1889         if (rc)
1890                 return rc;
1891
1892         pSMB->FileID = (__u16) smb_file_id;
1893         pSMB->LastWriteTime = 0xFFFFFFFF;
1894         pSMB->ByteCount = 0;
1895         rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
1896         cifs_stats_inc(&tcon->num_closes);
1897         if (rc) {
1898                 if (rc != -EINTR) {
1899                         /* EINTR is expected when user ctl-c to kill app */
1900                         cERROR(1, ("Send error in Close = %d", rc));
1901                 }
1902         }
1903
1904         /* Since session is dead, file will be closed on server already */
1905         if (rc == -EAGAIN)
1906                 rc = 0;
1907
1908         return rc;
1909 }
1910
1911 int
1912 CIFSSMBFlush(const int xid, struct cifsTconInfo *tcon, int smb_file_id)
1913 {
1914         int rc = 0;
1915         FLUSH_REQ *pSMB = NULL;
1916         cFYI(1, ("In CIFSSMBFlush"));
1917
1918         rc = small_smb_init(SMB_COM_FLUSH, 1, tcon, (void **) &pSMB);
1919         if (rc)
1920                 return rc;
1921
1922         pSMB->FileID = (__u16) smb_file_id;
1923         pSMB->ByteCount = 0;
1924         rc = SendReceiveNoRsp(xid, tcon->ses, (struct smb_hdr *) pSMB, 0);
1925         cifs_stats_inc(&tcon->num_flushes);
1926         if (rc)
1927                 cERROR(1, ("Send error in Flush = %d", rc));
1928
1929         return rc;
1930 }
1931
1932 int
1933 CIFSSMBRename(const int xid, struct cifsTconInfo *tcon,
1934               const char *fromName, const char *toName,
1935               const struct nls_table *nls_codepage, int remap)
1936 {
1937         int rc = 0;
1938         RENAME_REQ *pSMB = NULL;
1939         RENAME_RSP *pSMBr = NULL;
1940         int bytes_returned;
1941         int name_len, name_len2;
1942         __u16 count;
1943
1944         cFYI(1, ("In CIFSSMBRename"));
1945 renameRetry:
1946         rc = smb_init(SMB_COM_RENAME, 1, tcon, (void **) &pSMB,
1947                       (void **) &pSMBr);
1948         if (rc)
1949                 return rc;
1950
1951         pSMB->BufferFormat = 0x04;
1952         pSMB->SearchAttributes =
1953             cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
1954                         ATTR_DIRECTORY);
1955
1956         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
1957                 name_len =
1958                     cifsConvertToUCS((__le16 *) pSMB->OldFileName, fromName,
1959                                      PATH_MAX, nls_codepage, remap);
1960                 name_len++;     /* trailing null */
1961                 name_len *= 2;
1962                 pSMB->OldFileName[name_len] = 0x04;     /* pad */
1963         /* protocol requires ASCII signature byte on Unicode string */
1964                 pSMB->OldFileName[name_len + 1] = 0x00;
1965                 name_len2 =
1966                     cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
1967                                      toName, PATH_MAX, nls_codepage, remap);
1968                 name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
1969                 name_len2 *= 2; /* convert to bytes */
1970         } else {        /* BB improve the check for buffer overruns BB */
1971                 name_len = strnlen(fromName, PATH_MAX);
1972                 name_len++;     /* trailing null */
1973                 strncpy(pSMB->OldFileName, fromName, name_len);
1974                 name_len2 = strnlen(toName, PATH_MAX);
1975                 name_len2++;    /* trailing null */
1976                 pSMB->OldFileName[name_len] = 0x04;  /* 2nd buffer format */
1977                 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
1978                 name_len2++;    /* trailing null */
1979                 name_len2++;    /* signature byte */
1980         }
1981
1982         count = 1 /* 1st signature byte */  + name_len + name_len2;
1983         pSMB->hdr.smb_buf_length += count;
1984         pSMB->ByteCount = cpu_to_le16(count);
1985
1986         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
1987                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
1988         cifs_stats_inc(&tcon->num_renames);
1989         if (rc)
1990                 cFYI(1, ("Send error in rename = %d", rc));
1991
1992         cifs_buf_release(pSMB);
1993
1994         if (rc == -EAGAIN)
1995                 goto renameRetry;
1996
1997         return rc;
1998 }
1999
2000 int CIFSSMBRenameOpenFile(const int xid, struct cifsTconInfo *pTcon,
2001                 int netfid, const char *target_name,
2002                 const struct nls_table *nls_codepage, int remap)
2003 {
2004         struct smb_com_transaction2_sfi_req *pSMB  = NULL;
2005         struct smb_com_transaction2_sfi_rsp *pSMBr = NULL;
2006         struct set_file_rename *rename_info;
2007         char *data_offset;
2008         char dummy_string[30];
2009         int rc = 0;
2010         int bytes_returned = 0;
2011         int len_of_str;
2012         __u16 params, param_offset, offset, count, byte_count;
2013
2014         cFYI(1, ("Rename to File by handle"));
2015         rc = smb_init(SMB_COM_TRANSACTION2, 15, pTcon, (void **) &pSMB,
2016                         (void **) &pSMBr);
2017         if (rc)
2018                 return rc;
2019
2020         params = 6;
2021         pSMB->MaxSetupCount = 0;
2022         pSMB->Reserved = 0;
2023         pSMB->Flags = 0;
2024         pSMB->Timeout = 0;
2025         pSMB->Reserved2 = 0;
2026         param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
2027         offset = param_offset + params;
2028
2029         data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2030         rename_info = (struct set_file_rename *) data_offset;
2031         pSMB->MaxParameterCount = cpu_to_le16(2);
2032         pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find max SMB from sess */
2033         pSMB->SetupCount = 1;
2034         pSMB->Reserved3 = 0;
2035         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_FILE_INFORMATION);
2036         byte_count = 3 /* pad */  + params;
2037         pSMB->ParameterCount = cpu_to_le16(params);
2038         pSMB->TotalParameterCount = pSMB->ParameterCount;
2039         pSMB->ParameterOffset = cpu_to_le16(param_offset);
2040         pSMB->DataOffset = cpu_to_le16(offset);
2041         /* construct random name ".cifs_tmp<inodenum><mid>" */
2042         rename_info->overwrite = cpu_to_le32(1);
2043         rename_info->root_fid  = 0;
2044         /* unicode only call */
2045         if (target_name == NULL) {
2046                 sprintf(dummy_string, "cifs%x", pSMB->hdr.Mid);
2047                 len_of_str = cifsConvertToUCS((__le16 *)rename_info->target_name,
2048                                         dummy_string, 24, nls_codepage, remap);
2049         } else {
2050                 len_of_str = cifsConvertToUCS((__le16 *)rename_info->target_name,
2051                                         target_name, PATH_MAX, nls_codepage,
2052                                         remap);
2053         }
2054         rename_info->target_name_len = cpu_to_le32(2 * len_of_str);
2055         count = 12 /* sizeof(struct set_file_rename) */ + (2 * len_of_str);
2056         byte_count += count;
2057         pSMB->DataCount = cpu_to_le16(count);
2058         pSMB->TotalDataCount = pSMB->DataCount;
2059         pSMB->Fid = netfid;
2060         pSMB->InformationLevel =
2061                 cpu_to_le16(SMB_SET_FILE_RENAME_INFORMATION);
2062         pSMB->Reserved4 = 0;
2063         pSMB->hdr.smb_buf_length += byte_count;
2064         pSMB->ByteCount = cpu_to_le16(byte_count);
2065         rc = SendReceive(xid, pTcon->ses, (struct smb_hdr *) pSMB,
2066                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2067         cifs_stats_inc(&pTcon->num_t2renames);
2068         if (rc)
2069                 cFYI(1, ("Send error in Rename (by file handle) = %d", rc));
2070
2071         cifs_buf_release(pSMB);
2072
2073         /* Note: On -EAGAIN error only caller can retry on handle based calls
2074                 since file handle passed in no longer valid */
2075
2076         return rc;
2077 }
2078
2079 int
2080 CIFSSMBCopy(const int xid, struct cifsTconInfo *tcon, const char *fromName,
2081             const __u16 target_tid, const char *toName, const int flags,
2082             const struct nls_table *nls_codepage, int remap)
2083 {
2084         int rc = 0;
2085         COPY_REQ *pSMB = NULL;
2086         COPY_RSP *pSMBr = NULL;
2087         int bytes_returned;
2088         int name_len, name_len2;
2089         __u16 count;
2090
2091         cFYI(1, ("In CIFSSMBCopy"));
2092 copyRetry:
2093         rc = smb_init(SMB_COM_COPY, 1, tcon, (void **) &pSMB,
2094                         (void **) &pSMBr);
2095         if (rc)
2096                 return rc;
2097
2098         pSMB->BufferFormat = 0x04;
2099         pSMB->Tid2 = target_tid;
2100
2101         pSMB->Flags = cpu_to_le16(flags & COPY_TREE);
2102
2103         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2104                 name_len = cifsConvertToUCS((__le16 *) pSMB->OldFileName,
2105                                             fromName, PATH_MAX, nls_codepage,
2106                                             remap);
2107                 name_len++;     /* trailing null */
2108                 name_len *= 2;
2109                 pSMB->OldFileName[name_len] = 0x04;     /* pad */
2110                 /* protocol requires ASCII signature byte on Unicode string */
2111                 pSMB->OldFileName[name_len + 1] = 0x00;
2112                 name_len2 =
2113                     cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
2114                                 toName, PATH_MAX, nls_codepage, remap);
2115                 name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
2116                 name_len2 *= 2; /* convert to bytes */
2117         } else {        /* BB improve the check for buffer overruns BB */
2118                 name_len = strnlen(fromName, PATH_MAX);
2119                 name_len++;     /* trailing null */
2120                 strncpy(pSMB->OldFileName, fromName, name_len);
2121                 name_len2 = strnlen(toName, PATH_MAX);
2122                 name_len2++;    /* trailing null */
2123                 pSMB->OldFileName[name_len] = 0x04;  /* 2nd buffer format */
2124                 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
2125                 name_len2++;    /* trailing null */
2126                 name_len2++;    /* signature byte */
2127         }
2128
2129         count = 1 /* 1st signature byte */  + name_len + name_len2;
2130         pSMB->hdr.smb_buf_length += count;
2131         pSMB->ByteCount = cpu_to_le16(count);
2132
2133         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2134                 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2135         if (rc) {
2136                 cFYI(1, ("Send error in copy = %d with %d files copied",
2137                         rc, le16_to_cpu(pSMBr->CopyCount)));
2138         }
2139         cifs_buf_release(pSMB);
2140
2141         if (rc == -EAGAIN)
2142                 goto copyRetry;
2143
2144         return rc;
2145 }
2146
2147 int
2148 CIFSUnixCreateSymLink(const int xid, struct cifsTconInfo *tcon,
2149                       const char *fromName, const char *toName,
2150                       const struct nls_table *nls_codepage)
2151 {
2152         TRANSACTION2_SPI_REQ *pSMB = NULL;
2153         TRANSACTION2_SPI_RSP *pSMBr = NULL;
2154         char *data_offset;
2155         int name_len;
2156         int name_len_target;
2157         int rc = 0;
2158         int bytes_returned = 0;
2159         __u16 params, param_offset, offset, byte_count;
2160
2161         cFYI(1, ("In Symlink Unix style"));
2162 createSymLinkRetry:
2163         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2164                       (void **) &pSMBr);
2165         if (rc)
2166                 return rc;
2167
2168         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2169                 name_len =
2170                     cifs_strtoUCS((__le16 *) pSMB->FileName, fromName, PATH_MAX
2171                                   /* find define for this maxpathcomponent */
2172                                   , nls_codepage);
2173                 name_len++;     /* trailing null */
2174                 name_len *= 2;
2175
2176         } else {        /* BB improve the check for buffer overruns BB */
2177                 name_len = strnlen(fromName, PATH_MAX);
2178                 name_len++;     /* trailing null */
2179                 strncpy(pSMB->FileName, fromName, name_len);
2180         }
2181         params = 6 + name_len;
2182         pSMB->MaxSetupCount = 0;
2183         pSMB->Reserved = 0;
2184         pSMB->Flags = 0;
2185         pSMB->Timeout = 0;
2186         pSMB->Reserved2 = 0;
2187         param_offset = offsetof(struct smb_com_transaction2_spi_req,
2188                                 InformationLevel) - 4;
2189         offset = param_offset + params;
2190
2191         data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2192         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2193                 name_len_target =
2194                     cifs_strtoUCS((__le16 *) data_offset, toName, PATH_MAX
2195                                   /* find define for this maxpathcomponent */
2196                                   , nls_codepage);
2197                 name_len_target++;      /* trailing null */
2198                 name_len_target *= 2;
2199         } else {        /* BB improve the check for buffer overruns BB */
2200                 name_len_target = strnlen(toName, PATH_MAX);
2201                 name_len_target++;      /* trailing null */
2202                 strncpy(data_offset, toName, name_len_target);
2203         }
2204
2205         pSMB->MaxParameterCount = cpu_to_le16(2);
2206         /* BB find exact max on data count below from sess */
2207         pSMB->MaxDataCount = cpu_to_le16(1000);
2208         pSMB->SetupCount = 1;
2209         pSMB->Reserved3 = 0;
2210         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2211         byte_count = 3 /* pad */  + params + name_len_target;
2212         pSMB->DataCount = cpu_to_le16(name_len_target);
2213         pSMB->ParameterCount = cpu_to_le16(params);
2214         pSMB->TotalDataCount = pSMB->DataCount;
2215         pSMB->TotalParameterCount = pSMB->ParameterCount;
2216         pSMB->ParameterOffset = cpu_to_le16(param_offset);
2217         pSMB->DataOffset = cpu_to_le16(offset);
2218         pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_LINK);
2219         pSMB->Reserved4 = 0;
2220         pSMB->hdr.smb_buf_length += byte_count;
2221         pSMB->ByteCount = cpu_to_le16(byte_count);
2222         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2223                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2224         cifs_stats_inc(&tcon->num_symlinks);
2225         if (rc)
2226                 cFYI(1, ("Send error in SetPathInfo create symlink = %d", rc));
2227
2228         cifs_buf_release(pSMB);
2229
2230         if (rc == -EAGAIN)
2231                 goto createSymLinkRetry;
2232
2233         return rc;
2234 }
2235
2236 int
2237 CIFSUnixCreateHardLink(const int xid, struct cifsTconInfo *tcon,
2238                        const char *fromName, const char *toName,
2239                        const struct nls_table *nls_codepage, int remap)
2240 {
2241         TRANSACTION2_SPI_REQ *pSMB = NULL;
2242         TRANSACTION2_SPI_RSP *pSMBr = NULL;
2243         char *data_offset;
2244         int name_len;
2245         int name_len_target;
2246         int rc = 0;
2247         int bytes_returned = 0;
2248         __u16 params, param_offset, offset, byte_count;
2249
2250         cFYI(1, ("In Create Hard link Unix style"));
2251 createHardLinkRetry:
2252         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2253                       (void **) &pSMBr);
2254         if (rc)
2255                 return rc;
2256
2257         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2258                 name_len = cifsConvertToUCS((__le16 *) pSMB->FileName, toName,
2259                                             PATH_MAX, nls_codepage, remap);
2260                 name_len++;     /* trailing null */
2261                 name_len *= 2;
2262
2263         } else {        /* BB improve the check for buffer overruns BB */
2264                 name_len = strnlen(toName, PATH_MAX);
2265                 name_len++;     /* trailing null */
2266                 strncpy(pSMB->FileName, toName, name_len);
2267         }
2268         params = 6 + name_len;
2269         pSMB->MaxSetupCount = 0;
2270         pSMB->Reserved = 0;
2271         pSMB->Flags = 0;
2272         pSMB->Timeout = 0;
2273         pSMB->Reserved2 = 0;
2274         param_offset = offsetof(struct smb_com_transaction2_spi_req,
2275                                 InformationLevel) - 4;
2276         offset = param_offset + params;
2277
2278         data_offset = (char *) (&pSMB->hdr.Protocol) + offset;
2279         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2280                 name_len_target =
2281                     cifsConvertToUCS((__le16 *) data_offset, fromName, PATH_MAX,
2282                                      nls_codepage, remap);
2283                 name_len_target++;      /* trailing null */
2284                 name_len_target *= 2;
2285         } else {        /* BB improve the check for buffer overruns BB */
2286                 name_len_target = strnlen(fromName, PATH_MAX);
2287                 name_len_target++;      /* trailing null */
2288                 strncpy(data_offset, fromName, name_len_target);
2289         }
2290
2291         pSMB->MaxParameterCount = cpu_to_le16(2);
2292         /* BB find exact max on data count below from sess*/
2293         pSMB->MaxDataCount = cpu_to_le16(1000);
2294         pSMB->SetupCount = 1;
2295         pSMB->Reserved3 = 0;
2296         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2297         byte_count = 3 /* pad */  + params + name_len_target;
2298         pSMB->ParameterCount = cpu_to_le16(params);
2299         pSMB->TotalParameterCount = pSMB->ParameterCount;
2300         pSMB->DataCount = cpu_to_le16(name_len_target);
2301         pSMB->TotalDataCount = pSMB->DataCount;
2302         pSMB->ParameterOffset = cpu_to_le16(param_offset);
2303         pSMB->DataOffset = cpu_to_le16(offset);
2304         pSMB->InformationLevel = cpu_to_le16(SMB_SET_FILE_UNIX_HLINK);
2305         pSMB->Reserved4 = 0;
2306         pSMB->hdr.smb_buf_length += byte_count;
2307         pSMB->ByteCount = cpu_to_le16(byte_count);
2308         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2309                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2310         cifs_stats_inc(&tcon->num_hardlinks);
2311         if (rc)
2312                 cFYI(1, ("Send error in SetPathInfo (hard link) = %d", rc));
2313
2314         cifs_buf_release(pSMB);
2315         if (rc == -EAGAIN)
2316                 goto createHardLinkRetry;
2317
2318         return rc;
2319 }
2320
2321 int
2322 CIFSCreateHardLink(const int xid, struct cifsTconInfo *tcon,
2323                    const char *fromName, const char *toName,
2324                    const struct nls_table *nls_codepage, int remap)
2325 {
2326         int rc = 0;
2327         NT_RENAME_REQ *pSMB = NULL;
2328         RENAME_RSP *pSMBr = NULL;
2329         int bytes_returned;
2330         int name_len, name_len2;
2331         __u16 count;
2332
2333         cFYI(1, ("In CIFSCreateHardLink"));
2334 winCreateHardLinkRetry:
2335
2336         rc = smb_init(SMB_COM_NT_RENAME, 4, tcon, (void **) &pSMB,
2337                       (void **) &pSMBr);
2338         if (rc)
2339                 return rc;
2340
2341         pSMB->SearchAttributes =
2342             cpu_to_le16(ATTR_READONLY | ATTR_HIDDEN | ATTR_SYSTEM |
2343                         ATTR_DIRECTORY);
2344         pSMB->Flags = cpu_to_le16(CREATE_HARD_LINK);
2345         pSMB->ClusterCount = 0;
2346
2347         pSMB->BufferFormat = 0x04;
2348
2349         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2350                 name_len =
2351                     cifsConvertToUCS((__le16 *) pSMB->OldFileName, fromName,
2352                                      PATH_MAX, nls_codepage, remap);
2353                 name_len++;     /* trailing null */
2354                 name_len *= 2;
2355
2356                 /* protocol specifies ASCII buffer format (0x04) for unicode */
2357                 pSMB->OldFileName[name_len] = 0x04;
2358                 pSMB->OldFileName[name_len + 1] = 0x00; /* pad */
2359                 name_len2 =
2360                     cifsConvertToUCS((__le16 *)&pSMB->OldFileName[name_len + 2],
2361                                      toName, PATH_MAX, nls_codepage, remap);
2362                 name_len2 += 1 /* trailing null */  + 1 /* Signature word */ ;
2363                 name_len2 *= 2; /* convert to bytes */
2364         } else {        /* BB improve the check for buffer overruns BB */
2365                 name_len = strnlen(fromName, PATH_MAX);
2366                 name_len++;     /* trailing null */
2367                 strncpy(pSMB->OldFileName, fromName, name_len);
2368                 name_len2 = strnlen(toName, PATH_MAX);
2369                 name_len2++;    /* trailing null */
2370                 pSMB->OldFileName[name_len] = 0x04;     /* 2nd buffer format */
2371                 strncpy(&pSMB->OldFileName[name_len + 1], toName, name_len2);
2372                 name_len2++;    /* trailing null */
2373                 name_len2++;    /* signature byte */
2374         }
2375
2376         count = 1 /* string type byte */  + name_len + name_len2;
2377         pSMB->hdr.smb_buf_length += count;
2378         pSMB->ByteCount = cpu_to_le16(count);
2379
2380         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2381                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2382         cifs_stats_inc(&tcon->num_hardlinks);
2383         if (rc)
2384                 cFYI(1, ("Send error in hard link (NT rename) = %d", rc));
2385
2386         cifs_buf_release(pSMB);
2387         if (rc == -EAGAIN)
2388                 goto winCreateHardLinkRetry;
2389
2390         return rc;
2391 }
2392
2393 int
2394 CIFSSMBUnixQuerySymLink(const int xid, struct cifsTconInfo *tcon,
2395                         const unsigned char *searchName, char **symlinkinfo,
2396                         const struct nls_table *nls_codepage)
2397 {
2398 /* SMB_QUERY_FILE_UNIX_LINK */
2399         TRANSACTION2_QPI_REQ *pSMB = NULL;
2400         TRANSACTION2_QPI_RSP *pSMBr = NULL;
2401         int rc = 0;
2402         int bytes_returned;
2403         int name_len;
2404         __u16 params, byte_count;
2405         char *data_start;
2406
2407         cFYI(1, ("In QPathSymLinkInfo (Unix) for path %s", searchName));
2408
2409 querySymLinkRetry:
2410         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2411                       (void **) &pSMBr);
2412         if (rc)
2413                 return rc;
2414
2415         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2416                 name_len =
2417                     cifs_strtoUCS((__le16 *) pSMB->FileName, searchName,
2418                                   PATH_MAX, nls_codepage);
2419                 name_len++;     /* trailing null */
2420                 name_len *= 2;
2421         } else {        /* BB improve the check for buffer overruns BB */
2422                 name_len = strnlen(searchName, PATH_MAX);
2423                 name_len++;     /* trailing null */
2424                 strncpy(pSMB->FileName, searchName, name_len);
2425         }
2426
2427         params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
2428         pSMB->TotalDataCount = 0;
2429         pSMB->MaxParameterCount = cpu_to_le16(2);
2430         /* BB find exact max data count below from sess structure BB */
2431         pSMB->MaxDataCount = cpu_to_le16(4000);
2432         pSMB->MaxSetupCount = 0;
2433         pSMB->Reserved = 0;
2434         pSMB->Flags = 0;
2435         pSMB->Timeout = 0;
2436         pSMB->Reserved2 = 0;
2437         pSMB->ParameterOffset = cpu_to_le16(offsetof(
2438         struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
2439         pSMB->DataCount = 0;
2440         pSMB->DataOffset = 0;
2441         pSMB->SetupCount = 1;
2442         pSMB->Reserved3 = 0;
2443         pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
2444         byte_count = params + 1 /* pad */ ;
2445         pSMB->TotalParameterCount = cpu_to_le16(params);
2446         pSMB->ParameterCount = pSMB->TotalParameterCount;
2447         pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_FILE_UNIX_LINK);
2448         pSMB->Reserved4 = 0;
2449         pSMB->hdr.smb_buf_length += byte_count;
2450         pSMB->ByteCount = cpu_to_le16(byte_count);
2451
2452         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2453                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2454         if (rc) {
2455                 cFYI(1, ("Send error in QuerySymLinkInfo = %d", rc));
2456         } else {
2457                 /* decode response */
2458
2459                 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
2460                 /* BB also check enough total bytes returned */
2461                 if (rc || (pSMBr->ByteCount < 2))
2462                         rc = -EIO;
2463                 else {
2464                         bool is_unicode;
2465                         u16 count = le16_to_cpu(pSMBr->t2.DataCount);
2466
2467                         data_start = ((char *) &pSMBr->hdr.Protocol) +
2468                                            le16_to_cpu(pSMBr->t2.DataOffset);
2469
2470                         if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE)
2471                                 is_unicode = true;
2472                         else
2473                                 is_unicode = false;
2474
2475                         /* BB FIXME investigate remapping reserved chars here */
2476                         *symlinkinfo = cifs_strndup_from_ucs(data_start, count,
2477                                                     is_unicode, nls_codepage);
2478                         if (!symlinkinfo)
2479                                 rc = -ENOMEM;
2480                 }
2481         }
2482         cifs_buf_release(pSMB);
2483         if (rc == -EAGAIN)
2484                 goto querySymLinkRetry;
2485         return rc;
2486 }
2487
2488 #ifdef CONFIG_CIFS_EXPERIMENTAL
2489 /* Initialize NT TRANSACT SMB into small smb request buffer.
2490    This assumes that all NT TRANSACTS that we init here have
2491    total parm and data under about 400 bytes (to fit in small cifs
2492    buffer size), which is the case so far, it easily fits. NB:
2493         Setup words themselves and ByteCount
2494         MaxSetupCount (size of returned setup area) and
2495         MaxParameterCount (returned parms size) must be set by caller */
2496 static int
2497 smb_init_nttransact(const __u16 sub_command, const int setup_count,
2498                    const int parm_len, struct cifsTconInfo *tcon,
2499                    void **ret_buf)
2500 {
2501         int rc;
2502         __u32 temp_offset;
2503         struct smb_com_ntransact_req *pSMB;
2504
2505         rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
2506                                 (void **)&pSMB);
2507         if (rc)
2508                 return rc;
2509         *ret_buf = (void *)pSMB;
2510         pSMB->Reserved = 0;
2511         pSMB->TotalParameterCount = cpu_to_le32(parm_len);
2512         pSMB->TotalDataCount  = 0;
2513         pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
2514                                           MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
2515         pSMB->ParameterCount = pSMB->TotalParameterCount;
2516         pSMB->DataCount  = pSMB->TotalDataCount;
2517         temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
2518                         (setup_count * 2) - 4 /* for rfc1001 length itself */;
2519         pSMB->ParameterOffset = cpu_to_le32(temp_offset);
2520         pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
2521         pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
2522         pSMB->SubCommand = cpu_to_le16(sub_command);
2523         return 0;
2524 }
2525
2526 static int
2527 validate_ntransact(char *buf, char **ppparm, char **ppdata,
2528                    __u32 *pparmlen, __u32 *pdatalen)
2529 {
2530         char *end_of_smb;
2531         __u32 data_count, data_offset, parm_count, parm_offset;
2532         struct smb_com_ntransact_rsp *pSMBr;
2533
2534         *pdatalen = 0;
2535         *pparmlen = 0;
2536
2537         if (buf == NULL)
2538                 return -EINVAL;
2539
2540         pSMBr = (struct smb_com_ntransact_rsp *)buf;
2541
2542         /* ByteCount was converted from little endian in SendReceive */
2543         end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
2544                         (char *)&pSMBr->ByteCount;
2545
2546         data_offset = le32_to_cpu(pSMBr->DataOffset);
2547         data_count = le32_to_cpu(pSMBr->DataCount);
2548         parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
2549         parm_count = le32_to_cpu(pSMBr->ParameterCount);
2550
2551         *ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
2552         *ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
2553
2554         /* should we also check that parm and data areas do not overlap? */
2555         if (*ppparm > end_of_smb) {
2556                 cFYI(1, ("parms start after end of smb"));
2557                 return -EINVAL;
2558         } else if (parm_count + *ppparm > end_of_smb) {
2559                 cFYI(1, ("parm end after end of smb"));
2560                 return -EINVAL;
2561         } else if (*ppdata > end_of_smb) {
2562                 cFYI(1, ("data starts after end of smb"));
2563                 return -EINVAL;
2564         } else if (data_count + *ppdata > end_of_smb) {
2565                 cFYI(1, ("data %p + count %d (%p) ends after end of smb %p start %p",
2566                         *ppdata, data_count, (data_count + *ppdata),
2567                         end_of_smb, pSMBr));
2568                 return -EINVAL;
2569         } else if (parm_count + data_count > pSMBr->ByteCount) {
2570                 cFYI(1, ("parm count and data count larger than SMB"));
2571                 return -EINVAL;
2572         }
2573         *pdatalen = data_count;
2574         *pparmlen = parm_count;
2575         return 0;
2576 }
2577
2578 int
2579 CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
2580                         const unsigned char *searchName,
2581                         char *symlinkinfo, const int buflen, __u16 fid,
2582                         const struct nls_table *nls_codepage)
2583 {
2584         int rc = 0;
2585         int bytes_returned;
2586         struct smb_com_transaction_ioctl_req *pSMB;
2587         struct smb_com_transaction_ioctl_rsp *pSMBr;
2588
2589         cFYI(1, ("In Windows reparse style QueryLink for path %s", searchName));
2590         rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
2591                       (void **) &pSMBr);
2592         if (rc)
2593                 return rc;
2594
2595         pSMB->TotalParameterCount = 0 ;
2596         pSMB->TotalDataCount = 0;
2597         pSMB->MaxParameterCount = cpu_to_le32(2);
2598         /* BB find exact data count max from sess structure BB */
2599         pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
2600                                           MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
2601         pSMB->MaxSetupCount = 4;
2602         pSMB->Reserved = 0;
2603         pSMB->ParameterOffset = 0;
2604         pSMB->DataCount = 0;
2605         pSMB->DataOffset = 0;
2606         pSMB->SetupCount = 4;
2607         pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_IOCTL);
2608         pSMB->ParameterCount = pSMB->TotalParameterCount;
2609         pSMB->FunctionCode = cpu_to_le32(FSCTL_GET_REPARSE_POINT);
2610         pSMB->IsFsctl = 1; /* FSCTL */
2611         pSMB->IsRootFlag = 0;
2612         pSMB->Fid = fid; /* file handle always le */
2613         pSMB->ByteCount = 0;
2614
2615         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2616                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2617         if (rc) {
2618                 cFYI(1, ("Send error in QueryReparseLinkInfo = %d", rc));
2619         } else {                /* decode response */
2620                 __u32 data_offset = le32_to_cpu(pSMBr->DataOffset);
2621                 __u32 data_count = le32_to_cpu(pSMBr->DataCount);
2622                 if ((pSMBr->ByteCount < 2) || (data_offset > 512)) {
2623                 /* BB also check enough total bytes returned */
2624                         rc = -EIO;      /* bad smb */
2625                         goto qreparse_out;
2626                 }
2627                 if (data_count && (data_count < 2048)) {
2628                         char *end_of_smb = 2 /* sizeof byte count */ +
2629                                 pSMBr->ByteCount + (char *)&pSMBr->ByteCount;
2630
2631                         struct reparse_data *reparse_buf =
2632                                                 (struct reparse_data *)
2633                                                 ((char *)&pSMBr->hdr.Protocol
2634                                                                  + data_offset);
2635                         if ((char *)reparse_buf >= end_of_smb) {
2636                                 rc = -EIO;
2637                                 goto qreparse_out;
2638                         }
2639                         if ((reparse_buf->LinkNamesBuf +
2640                                 reparse_buf->TargetNameOffset +
2641                                 reparse_buf->TargetNameLen) > end_of_smb) {
2642                                 cFYI(1, ("reparse buf beyond SMB"));
2643                                 rc = -EIO;
2644                                 goto qreparse_out;
2645                         }
2646
2647                         if (pSMBr->hdr.Flags2 & SMBFLG2_UNICODE) {
2648                                 cifs_from_ucs2(symlinkinfo, (__le16 *)
2649                                                 (reparse_buf->LinkNamesBuf +
2650                                                 reparse_buf->TargetNameOffset),
2651                                                 buflen,
2652                                                 reparse_buf->TargetNameLen,
2653                                                 nls_codepage, 0);
2654                         } else { /* ASCII names */
2655                                 strncpy(symlinkinfo,
2656                                         reparse_buf->LinkNamesBuf +
2657                                         reparse_buf->TargetNameOffset,
2658                                         min_t(const int, buflen,
2659                                            reparse_buf->TargetNameLen));
2660                         }
2661                 } else {
2662                         rc = -EIO;
2663                         cFYI(1, ("Invalid return data count on "
2664                                  "get reparse info ioctl"));
2665                 }
2666                 symlinkinfo[buflen] = 0; /* just in case so the caller
2667                                         does not go off the end of the buffer */
2668                 cFYI(1, ("readlink result - %s", symlinkinfo));
2669         }
2670
2671 qreparse_out:
2672         cifs_buf_release(pSMB);
2673
2674         /* Note: On -EAGAIN error only caller can retry on handle based calls
2675                 since file handle passed in no longer valid */
2676
2677         return rc;
2678 }
2679 #endif /* CIFS_EXPERIMENTAL */
2680
2681 #ifdef CONFIG_CIFS_POSIX
2682
2683 /*Convert an Access Control Entry from wire format to local POSIX xattr format*/
2684 static void cifs_convert_ace(posix_acl_xattr_entry *ace,
2685                              struct cifs_posix_ace *cifs_ace)
2686 {
2687         /* u8 cifs fields do not need le conversion */
2688         ace->e_perm = cpu_to_le16(cifs_ace->cifs_e_perm);
2689         ace->e_tag  = cpu_to_le16(cifs_ace->cifs_e_tag);
2690         ace->e_id   = cpu_to_le32(le64_to_cpu(cifs_ace->cifs_uid));
2691         /* cFYI(1,("perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id)); */
2692
2693         return;
2694 }
2695
2696 /* Convert ACL from CIFS POSIX wire format to local Linux POSIX ACL xattr */
2697 static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen,
2698                                const int acl_type, const int size_of_data_area)
2699 {
2700         int size =  0;
2701         int i;
2702         __u16 count;
2703         struct cifs_posix_ace *pACE;
2704         struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src;
2705         posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)trgt;
2706
2707         if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION)
2708                 return -EOPNOTSUPP;
2709
2710         if (acl_type & ACL_TYPE_ACCESS) {
2711                 count = le16_to_cpu(cifs_acl->access_entry_count);
2712                 pACE = &cifs_acl->ace_array[0];
2713                 size = sizeof(struct cifs_posix_acl);
2714                 size += sizeof(struct cifs_posix_ace) * count;
2715                 /* check if we would go beyond end of SMB */
2716                 if (size_of_data_area < size) {
2717                         cFYI(1, ("bad CIFS POSIX ACL size %d vs. %d",
2718                                 size_of_data_area, size));
2719                         return -EINVAL;
2720                 }
2721         } else if (acl_type & ACL_TYPE_DEFAULT) {
2722                 count = le16_to_cpu(cifs_acl->access_entry_count);
2723                 size = sizeof(struct cifs_posix_acl);
2724                 size += sizeof(struct cifs_posix_ace) * count;
2725 /* skip past access ACEs to get to default ACEs */
2726                 pACE = &cifs_acl->ace_array[count];
2727                 count = le16_to_cpu(cifs_acl->default_entry_count);
2728                 size += sizeof(struct cifs_posix_ace) * count;
2729                 /* check if we would go beyond end of SMB */
2730                 if (size_of_data_area < size)
2731                         return -EINVAL;
2732         } else {
2733                 /* illegal type */
2734                 return -EINVAL;
2735         }
2736
2737         size = posix_acl_xattr_size(count);
2738         if ((buflen == 0) || (local_acl == NULL)) {
2739                 /* used to query ACL EA size */
2740         } else if (size > buflen) {
2741                 return -ERANGE;
2742         } else /* buffer big enough */ {
2743                 local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION);
2744                 for (i = 0; i < count ; i++) {
2745                         cifs_convert_ace(&local_acl->a_entries[i], pACE);
2746                         pACE++;
2747                 }
2748         }
2749         return size;
2750 }
2751
2752 static __u16 convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace,
2753                                      const posix_acl_xattr_entry *local_ace)
2754 {
2755         __u16 rc = 0; /* 0 = ACL converted ok */
2756
2757         cifs_ace->cifs_e_perm = le16_to_cpu(local_ace->e_perm);
2758         cifs_ace->cifs_e_tag =  le16_to_cpu(local_ace->e_tag);
2759         /* BB is there a better way to handle the large uid? */
2760         if (local_ace->e_id == cpu_to_le32(-1)) {
2761         /* Probably no need to le convert -1 on any arch but can not hurt */
2762                 cifs_ace->cifs_uid = cpu_to_le64(-1);
2763         } else
2764                 cifs_ace->cifs_uid = cpu_to_le64(le32_to_cpu(local_ace->e_id));
2765         /*cFYI(1,("perm %d tag %d id %d",ace->e_perm,ace->e_tag,ace->e_id));*/
2766         return rc;
2767 }
2768
2769 /* Convert ACL from local Linux POSIX xattr to CIFS POSIX ACL wire format */
2770 static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL,
2771                                const int buflen, const int acl_type)
2772 {
2773         __u16 rc = 0;
2774         struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data;
2775         posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)pACL;
2776         int count;
2777         int i;
2778
2779         if ((buflen == 0) || (pACL == NULL) || (cifs_acl == NULL))
2780                 return 0;
2781
2782         count = posix_acl_xattr_count((size_t)buflen);
2783         cFYI(1, ("setting acl with %d entries from buf of length %d and "
2784                 "version of %d",
2785                 count, buflen, le32_to_cpu(local_acl->a_version)));
2786         if (le32_to_cpu(local_acl->a_version) != 2) {
2787                 cFYI(1, ("unknown POSIX ACL version %d",
2788                      le32_to_cpu(local_acl->a_version)));
2789                 return 0;
2790         }
2791         cifs_acl->version = cpu_to_le16(1);
2792         if (acl_type == ACL_TYPE_ACCESS)
2793                 cifs_acl->access_entry_count = cpu_to_le16(count);
2794         else if (acl_type == ACL_TYPE_DEFAULT)
2795                 cifs_acl->default_entry_count = cpu_to_le16(count);
2796         else {
2797                 cFYI(1, ("unknown ACL type %d", acl_type));
2798                 return 0;
2799         }
2800         for (i = 0; i < count; i++) {
2801                 rc = convert_ace_to_cifs_ace(&cifs_acl->ace_array[i],
2802                                         &local_acl->a_entries[i]);
2803                 if (rc != 0) {
2804                         /* ACE not converted */
2805                         break;
2806                 }
2807         }
2808         if (rc == 0) {
2809                 rc = (__u16)(count * sizeof(struct cifs_posix_ace));
2810                 rc += sizeof(struct cifs_posix_acl);
2811                 /* BB add check to make sure ACL does not overflow SMB */
2812         }
2813         return rc;
2814 }
2815
2816 int
2817 CIFSSMBGetPosixACL(const int xid, struct cifsTconInfo *tcon,
2818                    const unsigned char *searchName,
2819                    char *acl_inf, const int buflen, const int acl_type,
2820                    const struct nls_table *nls_codepage, int remap)
2821 {
2822 /* SMB_QUERY_POSIX_ACL */
2823         TRANSACTION2_QPI_REQ *pSMB = NULL;
2824         TRANSACTION2_QPI_RSP *pSMBr = NULL;
2825         int rc = 0;
2826         int bytes_returned;
2827         int name_len;
2828         __u16 params, byte_count;
2829
2830         cFYI(1, ("In GetPosixACL (Unix) for path %s", searchName));
2831
2832 queryAclRetry:
2833         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2834                 (void **) &pSMBr);
2835         if (rc)
2836                 return rc;
2837
2838         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2839                 name_len =
2840                         cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
2841                                          PATH_MAX, nls_codepage, remap);
2842                 name_len++;     /* trailing null */
2843                 name_len *= 2;
2844                 pSMB->FileName[name_len] = 0;
2845                 pSMB->FileName[name_len+1] = 0;
2846         } else {        /* BB improve the check for buffer overruns BB */
2847                 name_len = strnlen(searchName, PATH_MAX);
2848                 name_len++;     /* trailing null */
2849                 strncpy(pSMB->FileName, searchName, name_len);
2850         }
2851
2852         params = 2 /* level */  + 4 /* rsrvd */  + name_len /* incl null */ ;
2853         pSMB->TotalDataCount = 0;
2854         pSMB->MaxParameterCount = cpu_to_le16(2);
2855         /* BB find exact max data count below from sess structure BB */
2856         pSMB->MaxDataCount = cpu_to_le16(4000);
2857         pSMB->MaxSetupCount = 0;
2858         pSMB->Reserved = 0;
2859         pSMB->Flags = 0;
2860         pSMB->Timeout = 0;
2861         pSMB->Reserved2 = 0;
2862         pSMB->ParameterOffset = cpu_to_le16(
2863                 offsetof(struct smb_com_transaction2_qpi_req,
2864                          InformationLevel) - 4);
2865         pSMB->DataCount = 0;
2866         pSMB->DataOffset = 0;
2867         pSMB->SetupCount = 1;
2868         pSMB->Reserved3 = 0;
2869         pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
2870         byte_count = params + 1 /* pad */ ;
2871         pSMB->TotalParameterCount = cpu_to_le16(params);
2872         pSMB->ParameterCount = pSMB->TotalParameterCount;
2873         pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_POSIX_ACL);
2874         pSMB->Reserved4 = 0;
2875         pSMB->hdr.smb_buf_length += byte_count;
2876         pSMB->ByteCount = cpu_to_le16(byte_count);
2877
2878         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2879                 (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2880         cifs_stats_inc(&tcon->num_acl_get);
2881         if (rc) {
2882                 cFYI(1, ("Send error in Query POSIX ACL = %d", rc));
2883         } else {
2884                 /* decode response */
2885
2886                 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
2887                 if (rc || (pSMBr->ByteCount < 2))
2888                 /* BB also check enough total bytes returned */
2889                         rc = -EIO;      /* bad smb */
2890                 else {
2891                         __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
2892                         __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
2893                         rc = cifs_copy_posix_acl(acl_inf,
2894                                 (char *)&pSMBr->hdr.Protocol+data_offset,
2895                                 buflen, acl_type, count);
2896                 }
2897         }
2898         cifs_buf_release(pSMB);
2899         if (rc == -EAGAIN)
2900                 goto queryAclRetry;
2901         return rc;
2902 }
2903
2904 int
2905 CIFSSMBSetPosixACL(const int xid, struct cifsTconInfo *tcon,
2906                    const unsigned char *fileName,
2907                    const char *local_acl, const int buflen,
2908                    const int acl_type,
2909                    const struct nls_table *nls_codepage, int remap)
2910 {
2911         struct smb_com_transaction2_spi_req *pSMB = NULL;
2912         struct smb_com_transaction2_spi_rsp *pSMBr = NULL;
2913         char *parm_data;
2914         int name_len;
2915         int rc = 0;
2916         int bytes_returned = 0;
2917         __u16 params, byte_count, data_count, param_offset, offset;
2918
2919         cFYI(1, ("In SetPosixACL (Unix) for path %s", fileName));
2920 setAclRetry:
2921         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
2922                       (void **) &pSMBr);
2923         if (rc)
2924                 return rc;
2925         if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
2926                 name_len =
2927                         cifsConvertToUCS((__le16 *) pSMB->FileName, fileName,
2928                                       PATH_MAX, nls_codepage, remap);
2929                 name_len++;     /* trailing null */
2930                 name_len *= 2;
2931         } else {        /* BB improve the check for buffer overruns BB */
2932                 name_len = strnlen(fileName, PATH_MAX);
2933                 name_len++;     /* trailing null */
2934                 strncpy(pSMB->FileName, fileName, name_len);
2935         }
2936         params = 6 + name_len;
2937         pSMB->MaxParameterCount = cpu_to_le16(2);
2938         /* BB find max SMB size from sess */
2939         pSMB->MaxDataCount = cpu_to_le16(1000);
2940         pSMB->MaxSetupCount = 0;
2941         pSMB->Reserved = 0;
2942         pSMB->Flags = 0;
2943         pSMB->Timeout = 0;
2944         pSMB->Reserved2 = 0;
2945         param_offset = offsetof(struct smb_com_transaction2_spi_req,
2946                                 InformationLevel) - 4;
2947         offset = param_offset + params;
2948         parm_data = ((char *) &pSMB->hdr.Protocol) + offset;
2949         pSMB->ParameterOffset = cpu_to_le16(param_offset);
2950
2951         /* convert to on the wire format for POSIX ACL */
2952         data_count = ACL_to_cifs_posix(parm_data, local_acl, buflen, acl_type);
2953
2954         if (data_count == 0) {
2955                 rc = -EOPNOTSUPP;
2956                 goto setACLerrorExit;
2957         }
2958         pSMB->DataOffset = cpu_to_le16(offset);
2959         pSMB->SetupCount = 1;
2960         pSMB->Reserved3 = 0;
2961         pSMB->SubCommand = cpu_to_le16(TRANS2_SET_PATH_INFORMATION);
2962         pSMB->InformationLevel = cpu_to_le16(SMB_SET_POSIX_ACL);
2963         byte_count = 3 /* pad */  + params + data_count;
2964         pSMB->DataCount = cpu_to_le16(data_count);
2965         pSMB->TotalDataCount = pSMB->DataCount;
2966         pSMB->ParameterCount = cpu_to_le16(params);
2967         pSMB->TotalParameterCount = pSMB->ParameterCount;
2968         pSMB->Reserved4 = 0;
2969         pSMB->hdr.smb_buf_length += byte_count;
2970         pSMB->ByteCount = cpu_to_le16(byte_count);
2971         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
2972                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
2973         if (rc)
2974                 cFYI(1, ("Set POSIX ACL returned %d", rc));
2975
2976 setACLerrorExit:
2977         cifs_buf_release(pSMB);
2978         if (rc == -EAGAIN)
2979                 goto setAclRetry;
2980         return rc;
2981 }
2982
2983 /* BB fix tabs in this function FIXME BB */
2984 int
2985 CIFSGetExtAttr(const int xid, struct cifsTconInfo *tcon,
2986                const int netfid, __u64 *pExtAttrBits, __u64 *pMask)
2987 {
2988         int rc = 0;
2989         struct smb_t2_qfi_req *pSMB = NULL;
2990         struct smb_t2_qfi_rsp *pSMBr = NULL;
2991         int bytes_returned;
2992         __u16 params, byte_count;
2993
2994         cFYI(1, ("In GetExtAttr"));
2995         if (tcon == NULL)
2996                 return -ENODEV;
2997
2998 GetExtAttrRetry:
2999         rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
3000                         (void **) &pSMBr);
3001         if (rc)
3002                 return rc;
3003
3004         params = 2 /* level */ + 2 /* fid */;
3005         pSMB->t2.TotalDataCount = 0;
3006         pSMB->t2.MaxParameterCount = cpu_to_le16(4);
3007         /* BB find exact max data count below from sess structure BB */
3008         pSMB->t2.MaxDataCount = cpu_to_le16(4000);
3009         pSMB->t2.MaxSetupCount = 0;
3010         pSMB->t2.Reserved = 0;
3011         pSMB->t2.Flags = 0;
3012         pSMB->t2.Timeout = 0;
3013         pSMB->t2.Reserved2 = 0;
3014         pSMB->t2.ParameterOffset = cpu_to_le16(offsetof(struct smb_t2_qfi_req,
3015                                                Fid) - 4);
3016         pSMB->t2.DataCount = 0;
3017         pSMB->t2.DataOffset = 0;
3018         pSMB->t2.SetupCount = 1;
3019         pSMB->t2.Reserved3 = 0;
3020         pSMB->t2.SubCommand = cpu_to_le16(TRANS2_QUERY_FILE_INFORMATION);
3021         byte_count = params + 1 /* pad */ ;
3022         pSMB->t2.TotalParameterCount = cpu_to_le16(params);
3023         pSMB->t2.ParameterCount = pSMB->t2.TotalParameterCount;
3024         pSMB->InformationLevel = cpu_to_le16(SMB_QUERY_ATTR_FLAGS);
3025         pSMB->Pad = 0;
3026         pSMB->Fid = netfid;
3027         pSMB->hdr.smb_buf_length += byte_count;
3028         pSMB->t2.ByteCount = cpu_to_le16(byte_count);
3029
3030         rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
3031                          (struct smb_hdr *) pSMBr, &bytes_returned, 0);
3032         if (rc) {
3033                 cFYI(1, ("error %d in GetExtAttr", rc));
3034         } else {
3035                 /* decode response */
3036                 rc = validate_t2((struct smb_t2_rsp *)pSMBr);
3037                 if (rc || (pSMBr->ByteCount < 2))
3038                 /* BB also check enough total bytes returned */
3039                         /* If rc should we check for EOPNOSUPP and
3040                            disable the srvino flag? or in caller? */
3041                         rc = -EIO;      /* bad smb */
3042                 else {
3043                         __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
3044                         __u16 count = le16_to_cpu(pSMBr->t2.DataCount);
3045                         struct file_chattr_info *pfinfo;
3046                         /* BB Do we need a cast or hash here ? */
3047                         if (count != 16) {
3048                                 cFYI(1, ("Illegal size ret in GetExtAttr"));
3049                                 rc = -EIO;
3050                                 goto GetExtAttrOut;
3051                         }
3052                         pfinfo = (struct file_chattr_info *)
3053                                  (data_offset + (char *) &pSMBr->hdr.Protocol);
3054                         *pExtAttrBits = le64_to_cpu(pfinfo->mode);
3055                         *pMask = le64_to_cpu(pfinfo->mask);
3056                 }
3057         }
3058 GetExtAttrOut:
3059         cifs_buf_release(pSMB);
3060         if (rc == -EAGAIN)
3061                 goto GetExtAttrRetry;
3062         return rc;
3063 }
3064
3065 #endif /* CONFIG_POSIX */
3066
3067 #ifdef CONFIG_CIFS_EXPERIMENTAL
3068 /* Get Security Descriptor (by handle) from remote server for a file or dir */
3069 int
3070 CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
3071                   struct cifs_ntsd **acl_inf, __u32 *pbuflen)
3072 {
3073         int rc = 0;
3074         int buf_type = 0;
3075         QUERY_SEC_DESC_REQ *pSMB;
3076         struct kvec iov[1];
3077
3078         cFYI(1, ("GetCifsACL"));
3079
3080         *pbuflen = 0;
3081         *acl_inf = NULL;
3082
3083         rc = smb_init_nttransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
3084                         8 /* parm len */, tcon, (void **) &pSMB);
3085         if (rc)
3086                 return rc;
3087
3088         pSMB->MaxParameterCount = cpu_to_le32(4);
3089         /* BB TEST with big acls that might need to be e.g. larger than 16K */
3090         pSMB->MaxSetupCount = 0;
3091         pSMB->Fid = fid; /* file handle always le */
3092         pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
3093                                      CIFS_ACL_DACL);
3094         pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
3095         pSMB->hdr.smb_buf_length += 11;
3096         iov[0].iov_base = (char *)pSMB;
3097         iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
3098
3099         rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type,
3100                          CIFS_STD_OP);
3101         cifs_stats_inc(&tcon->num_acl_get);
3102         if (rc) {
3103                 cFYI(1, ("Send error in QuerySecDesc = %d", rc));
3104         } else {                /* decode response */
3105                 __le32 *parm;
3106                 __u32 parm_len;
3107                 __u32 acl_len;
3108                 struct smb_com_ntransact_rsp *pSMBr;
3109                 char *pdata;
3110
3111 /* validate_nttransact */
3112                 rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
3113                                         &pdata, &parm_len, pbuflen);
3114                 if (rc)
3115                         goto qsec_out;
3116                 pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
3117
3118                 cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, *acl_inf));
3119
3120                 if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
3121                         rc = -EIO;      /* bad smb */
3122                         *pbuflen = 0;
3123                         goto qsec_out;
3124                 }
3125
3126 /* BB check that data area is minimum length and as big as acl_len */
3127
3128                 acl_len = le32_to_cpu(*parm);
3129                 if (acl_len != *pbuflen) {
3130                         cERROR(1, ("acl length %d does not match %d",
3131                                    acl_len, *pbuflen));
3132                         if (*pbuflen > acl_len)
3133                                 *pbuflen = acl_len;
3134                 }
3135
3136                 /* check if buffer is big enough for the acl
3137                    header followed by the smallest SID */
3138                 if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
3139                     (*pbuflen >= 64 * 1024)) {
3140                         cERROR(1, ("bad acl length %d", *pbuflen));
3141                         rc = -EINVAL;
3142                         *pbuflen = 0;