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Documentation: move sharedsubtrees.txt to filesystems/
[wrt350n-kernel.git] / fs / cifs / inode.c
blob47f2621001e4e09069c2c390f77fb95a4d3dd15f
1 /*
2 * fs/cifs/inode.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/fs.h>
22 #include <linux/stat.h>
23 #include <linux/pagemap.h>
24 #include <asm/div64.h>
25 #include "cifsfs.h"
26 #include "cifspdu.h"
27 #include "cifsglob.h"
28 #include "cifsproto.h"
29 #include "cifs_debug.h"
30 #include "cifs_fs_sb.h"
31
32 int cifs_get_inode_info_unix(struct inode **pinode,
33 const unsigned char *search_path, struct super_block *sb, int xid)
34 {
35 int rc = 0;
36 FILE_UNIX_BASIC_INFO findData;
37 struct cifsTconInfo *pTcon;
38 struct inode *inode;
39 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
40 char *tmp_path;
41
42 pTcon = cifs_sb->tcon;
43 cFYI(1, ("Getting info on %s", search_path));
44 /* could have done a find first instead but this returns more info */
45 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
46 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
47 CIFS_MOUNT_MAP_SPECIAL_CHR);
48 /* dump_mem("\nUnixQPathInfo return data", &findData,
49 sizeof(findData)); */
50 if (rc) {
51 if (rc == -EREMOTE) {
52 tmp_path =
53 kmalloc(strnlen(pTcon->treeName,
54 MAX_TREE_SIZE + 1) +
55 strnlen(search_path, MAX_PATHCONF) + 1,
56 GFP_KERNEL);
57 if (tmp_path == NULL)
58 return -ENOMEM;
59
60 /* have to skip first of the double backslash of
61 UNC name */
62 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
63 strncat(tmp_path, search_path, MAX_PATHCONF);
64 rc = connect_to_dfs_path(xid, pTcon->ses,
65 /* treename + */ tmp_path,
66 cifs_sb->local_nls,
67 cifs_sb->mnt_cifs_flags &
68 CIFS_MOUNT_MAP_SPECIAL_CHR);
69 kfree(tmp_path);
70
71 /* BB fix up inode etc. */
72 } else if (rc) {
73 return rc;
74 }
75 } else {
76 struct cifsInodeInfo *cifsInfo;
77 __u32 type = le32_to_cpu(findData.Type);
78 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
79 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
80
81 /* get new inode */
82 if (*pinode == NULL) {
83 *pinode = new_inode(sb);
84 if (*pinode == NULL)
85 return -ENOMEM;
86 /* Is an i_ino of zero legal? */
87 /* Are there sanity checks we can use to ensure that
88 the server is really filling in that field? */
89 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
90 (*pinode)->i_ino =
91 (unsigned long)findData.UniqueId;
92 } /* note ino incremented to unique num in new_inode */
93 if (sb->s_flags & MS_NOATIME)
94 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
95
96 insert_inode_hash(*pinode);
97 }
98
99 inode = *pinode;
100 cifsInfo = CIFS_I(inode);
101
102 cFYI(1, ("Old time %ld", cifsInfo->time));
103 cifsInfo->time = jiffies;
104 cFYI(1, ("New time %ld", cifsInfo->time));
105 /* this is ok to set on every inode revalidate */
106 atomic_set(&cifsInfo->inUse, 1);
107
108 inode->i_atime =
109 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
110 inode->i_mtime =
111 cifs_NTtimeToUnix(le64_to_cpu
112 (findData.LastModificationTime));
113 inode->i_ctime =
114 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
115 inode->i_mode = le64_to_cpu(findData.Permissions);
116 /* since we set the inode type below we need to mask off
117 to avoid strange results if bits set above */
118 inode->i_mode &= ~S_IFMT;
119 if (type == UNIX_FILE) {
120 inode->i_mode |= S_IFREG;
121 } else if (type == UNIX_SYMLINK) {
122 inode->i_mode |= S_IFLNK;
123 } else if (type == UNIX_DIR) {
124 inode->i_mode |= S_IFDIR;
125 } else if (type == UNIX_CHARDEV) {
126 inode->i_mode |= S_IFCHR;
127 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
128 le64_to_cpu(findData.DevMinor) & MINORMASK);
129 } else if (type == UNIX_BLOCKDEV) {
130 inode->i_mode |= S_IFBLK;
131 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
132 le64_to_cpu(findData.DevMinor) & MINORMASK);
133 } else if (type == UNIX_FIFO) {
134 inode->i_mode |= S_IFIFO;
135 } else if (type == UNIX_SOCKET) {
136 inode->i_mode |= S_IFSOCK;
137 } else {
138 /* safest to call it a file if we do not know */
139 inode->i_mode |= S_IFREG;
140 cFYI(1, ("unknown type %d", type));
141 }
142
143 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
144 inode->i_uid = cifs_sb->mnt_uid;
145 else
146 inode->i_uid = le64_to_cpu(findData.Uid);
147
148 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
149 inode->i_gid = cifs_sb->mnt_gid;
150 else
151 inode->i_gid = le64_to_cpu(findData.Gid);
152
153 inode->i_nlink = le64_to_cpu(findData.Nlinks);
154
155 spin_lock(&inode->i_lock);
156 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
157 /* can not safely change the file size here if the
158 client is writing to it due to potential races */
159 i_size_write(inode, end_of_file);
160
161 /* blksize needs to be multiple of two. So safer to default to
162 blksize and blkbits set in superblock so 2**blkbits and blksize
163 will match rather than setting to:
164 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
165
166 /* This seems incredibly stupid but it turns out that i_blocks
167 is not related to (i_size / i_blksize), instead 512 byte size
168 is required for calculating num blocks */
169
170 /* 512 bytes (2**9) is the fake blocksize that must be used */
171 /* for this calculation */
172 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
173 }
174 spin_unlock(&inode->i_lock);
175
176 if (num_of_bytes < end_of_file)
177 cFYI(1, ("allocation size less than end of file"));
178 cFYI(1, ("Size %ld and blocks %llu",
179 (unsigned long) inode->i_size,
180 (unsigned long long)inode->i_blocks));
181 if (S_ISREG(inode->i_mode)) {
182 cFYI(1, ("File inode"));
183 inode->i_op = &cifs_file_inode_ops;
184 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
185 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
186 inode->i_fop =
187 &cifs_file_direct_nobrl_ops;
188 else
189 inode->i_fop = &cifs_file_direct_ops;
190 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
191 inode->i_fop = &cifs_file_nobrl_ops;
192 else /* not direct, send byte range locks */
193 inode->i_fop = &cifs_file_ops;
194
195 /* check if server can support readpages */
196 if (pTcon->ses->server->maxBuf <
197 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
198 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
199 else
200 inode->i_data.a_ops = &cifs_addr_ops;
201 } else if (S_ISDIR(inode->i_mode)) {
202 cFYI(1, ("Directory inode"));
203 inode->i_op = &cifs_dir_inode_ops;
204 inode->i_fop = &cifs_dir_ops;
205 } else if (S_ISLNK(inode->i_mode)) {
206 cFYI(1, ("Symbolic Link inode"));
207 inode->i_op = &cifs_symlink_inode_ops;
208 /* tmp_inode->i_fop = */ /* do not need to set to anything */
209 } else {
210 cFYI(1, ("Init special inode"));
211 init_special_inode(inode, inode->i_mode,
212 inode->i_rdev);
213 }
214 }
215 return rc;
216 }
217
218 static int decode_sfu_inode(struct inode *inode, __u64 size,
219 const unsigned char *path,
220 struct cifs_sb_info *cifs_sb, int xid)
221 {
222 int rc;
223 int oplock = FALSE;
224 __u16 netfid;
225 struct cifsTconInfo *pTcon = cifs_sb->tcon;
226 char buf[24];
227 unsigned int bytes_read;
228 char *pbuf;
229
230 pbuf = buf;
231
232 if (size == 0) {
233 inode->i_mode |= S_IFIFO;
234 return 0;
235 } else if (size < 8) {
236 return -EINVAL; /* EOPNOTSUPP? */
237 }
238
239 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
240 CREATE_NOT_DIR, &netfid, &oplock, NULL,
241 cifs_sb->local_nls,
242 cifs_sb->mnt_cifs_flags &
243 CIFS_MOUNT_MAP_SPECIAL_CHR);
244 if (rc == 0) {
245 int buf_type = CIFS_NO_BUFFER;
246 /* Read header */
247 rc = CIFSSMBRead(xid, pTcon,
248 netfid,
249 24 /* length */, 0 /* offset */,
250 &bytes_read, &pbuf, &buf_type);
251 if ((rc == 0) && (bytes_read >= 8)) {
252 if (memcmp("IntxBLK", pbuf, 8) == 0) {
253 cFYI(1, ("Block device"));
254 inode->i_mode |= S_IFBLK;
255 if (bytes_read == 24) {
256 /* we have enough to decode dev num */
257 __u64 mjr; /* major */
258 __u64 mnr; /* minor */
259 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
260 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
261 inode->i_rdev = MKDEV(mjr, mnr);
262 }
263 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
264 cFYI(1, ("Char device"));
265 inode->i_mode |= S_IFCHR;
266 if (bytes_read == 24) {
267 /* we have enough to decode dev num */
268 __u64 mjr; /* major */
269 __u64 mnr; /* minor */
270 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
271 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
272 inode->i_rdev = MKDEV(mjr, mnr);
273 }
274 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
275 cFYI(1, ("Symlink"));
276 inode->i_mode |= S_IFLNK;
277 } else {
278 inode->i_mode |= S_IFREG; /* file? */
279 rc = -EOPNOTSUPP;
280 }
281 } else {
282 inode->i_mode |= S_IFREG; /* then it is a file */
283 rc = -EOPNOTSUPP; /* or some unknown SFU type */
284 }
285 CIFSSMBClose(xid, pTcon, netfid);
286 }
287 return rc;
288 }
289
290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
291
292 static int get_sfu_mode(struct inode *inode,
293 const unsigned char *path,
294 struct cifs_sb_info *cifs_sb, int xid)
295 {
296 #ifdef CONFIG_CIFS_XATTR
297 ssize_t rc;
298 char ea_value[4];
299 __u32 mode;
300
301 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
302 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
303 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
304 if (rc < 0)
305 return (int)rc;
306 else if (rc > 3) {
307 mode = le32_to_cpu(*((__le32 *)ea_value));
308 inode->i_mode &= ~SFBITS_MASK;
309 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
310 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
311 cFYI(1, ("special mode bits 0%o", mode));
312 return 0;
313 } else {
314 return 0;
315 }
316 #else
317 return -EOPNOTSUPP;
318 #endif
319 }
320
321 int cifs_get_inode_info(struct inode **pinode,
322 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
323 struct super_block *sb, int xid)
324 {
325 int rc = 0;
326 struct cifsTconInfo *pTcon;
327 struct inode *inode;
328 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
329 char *tmp_path;
330 char *buf = NULL;
331 int adjustTZ = FALSE;
332
333 pTcon = cifs_sb->tcon;
334 cFYI(1, ("Getting info on %s", search_path));
335
336 if ((pfindData == NULL) && (*pinode != NULL)) {
337 if (CIFS_I(*pinode)->clientCanCacheRead) {
338 cFYI(1, ("No need to revalidate cached inode sizes"));
339 return rc;
340 }
341 }
342
343 /* if file info not passed in then get it from server */
344 if (pfindData == NULL) {
345 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
346 if (buf == NULL)
347 return -ENOMEM;
348 pfindData = (FILE_ALL_INFO *)buf;
349 /* could do find first instead but this returns more info */
350 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
351 0 /* not legacy */,
352 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
353 CIFS_MOUNT_MAP_SPECIAL_CHR);
354 /* BB optimize code so we do not make the above call
355 when server claims no NT SMB support and the above call
356 failed at least once - set flag in tcon or mount */
357 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
358 rc = SMBQueryInformation(xid, pTcon, search_path,
359 pfindData, cifs_sb->local_nls,
360 cifs_sb->mnt_cifs_flags &
361 CIFS_MOUNT_MAP_SPECIAL_CHR);
362 adjustTZ = TRUE;
363 }
364 }
365 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
366 if (rc) {
367 if (rc == -EREMOTE) {
368 tmp_path =
369 kmalloc(strnlen
370 (pTcon->treeName,
371 MAX_TREE_SIZE + 1) +
372 strnlen(search_path, MAX_PATHCONF) + 1,
373 GFP_KERNEL);
374 if (tmp_path == NULL) {
375 kfree(buf);
376 return -ENOMEM;
377 }
378
379 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
380 strncat(tmp_path, search_path, MAX_PATHCONF);
381 rc = connect_to_dfs_path(xid, pTcon->ses,
382 /* treename + */ tmp_path,
383 cifs_sb->local_nls,
384 cifs_sb->mnt_cifs_flags &
385 CIFS_MOUNT_MAP_SPECIAL_CHR);
386 kfree(tmp_path);
387 /* BB fix up inode etc. */
388 } else if (rc) {
389 kfree(buf);
390 return rc;
391 }
392 } else {
393 struct cifsInodeInfo *cifsInfo;
394 __u32 attr = le32_to_cpu(pfindData->Attributes);
395
396 /* get new inode */
397 if (*pinode == NULL) {
398 *pinode = new_inode(sb);
399 if (*pinode == NULL) {
400 kfree(buf);
401 return -ENOMEM;
402 }
403 /* Is an i_ino of zero legal? Can we use that to check
404 if the server supports returning inode numbers? Are
405 there other sanity checks we can use to ensure that
406 the server is really filling in that field? */
407
408 /* We can not use the IndexNumber field by default from
409 Windows or Samba (in ALL_INFO buf) but we can request
410 it explicitly. It may not be unique presumably if
411 the server has multiple devices mounted under one
412 share */
413
414 /* There may be higher info levels that work but are
415 there Windows server or network appliances for which
416 IndexNumber field is not guaranteed unique? */
417
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
419 int rc1 = 0;
420 __u64 inode_num;
421
422 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
423 search_path, &inode_num,
424 cifs_sb->local_nls,
425 cifs_sb->mnt_cifs_flags &
426 CIFS_MOUNT_MAP_SPECIAL_CHR);
427 if (rc1) {
428 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
429 /* BB EOPNOSUPP disable SERVER_INUM? */
430 } else /* do we need cast or hash to ino? */
431 (*pinode)->i_ino = inode_num;
432 } /* else ino incremented to unique num in new_inode*/
433 if (sb->s_flags & MS_NOATIME)
434 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
435 insert_inode_hash(*pinode);
436 }
437 inode = *pinode;
438 cifsInfo = CIFS_I(inode);
439 cifsInfo->cifsAttrs = attr;
440 cFYI(1, ("Old time %ld", cifsInfo->time));
441 cifsInfo->time = jiffies;
442 cFYI(1, ("New time %ld", cifsInfo->time));
443
444 /* blksize needs to be multiple of two. So safer to default to
445 blksize and blkbits set in superblock so 2**blkbits and blksize
446 will match rather than setting to:
447 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
448
449 /* Linux can not store file creation time so ignore it */
450 if (pfindData->LastAccessTime)
451 inode->i_atime = cifs_NTtimeToUnix
452 (le64_to_cpu(pfindData->LastAccessTime));
453 else /* do not need to use current_fs_time - time not stored */
454 inode->i_atime = CURRENT_TIME;
455 inode->i_mtime =
456 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
457 inode->i_ctime =
458 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
459 cFYI(0, ("Attributes came in as 0x%x", attr));
460 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
461 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
462 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
463 }
464
465 /* set default mode. will override for dirs below */
466 if (atomic_read(&cifsInfo->inUse) == 0)
467 /* new inode, can safely set these fields */
468 inode->i_mode = cifs_sb->mnt_file_mode;
469 else /* since we set the inode type below we need to mask off
470 to avoid strange results if type changes and both
471 get orred in */
472 inode->i_mode &= ~S_IFMT;
473 /* if (attr & ATTR_REPARSE) */
474 /* We no longer handle these as symlinks because we could not
475 follow them due to the absolute path with drive letter */
476 if (attr & ATTR_DIRECTORY) {
477 /* override default perms since we do not do byte range locking
478 on dirs */
479 inode->i_mode = cifs_sb->mnt_dir_mode;
480 inode->i_mode |= S_IFDIR;
481 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
482 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
483 /* No need to le64 convert size of zero */
484 (pfindData->EndOfFile == 0)) {
485 inode->i_mode = cifs_sb->mnt_file_mode;
486 inode->i_mode |= S_IFIFO;
487 /* BB Finish for SFU style symlinks and devices */
488 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
489 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
490 if (decode_sfu_inode(inode,
491 le64_to_cpu(pfindData->EndOfFile),
492 search_path,
493 cifs_sb, xid)) {
494 cFYI(1, ("Unrecognized sfu inode type"));
495 }
496 cFYI(1, ("sfu mode 0%o", inode->i_mode));
497 } else {
498 inode->i_mode |= S_IFREG;
499 /* treat the dos attribute of read-only as read-only
500 mode e.g. 555 */
501 if (cifsInfo->cifsAttrs & ATTR_READONLY)
502 inode->i_mode &= ~(S_IWUGO);
503 else if ((inode->i_mode & S_IWUGO) == 0)
504 /* the ATTR_READONLY flag may have been */
505 /* changed on server -- set any w bits */
506 /* allowed by mnt_file_mode */
507 inode->i_mode |= (S_IWUGO &
508 cifs_sb->mnt_file_mode);
509 /* BB add code here -
510 validate if device or weird share or device type? */
511 }
512
513 spin_lock(&inode->i_lock);
514 if (is_size_safe_to_change(cifsInfo,
515 le64_to_cpu(pfindData->EndOfFile))) {
516 /* can not safely shrink the file size here if the
517 client is writing to it due to potential races */
518 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
519
520 /* 512 bytes (2**9) is the fake blocksize that must be
521 used for this calculation */
522 inode->i_blocks = (512 - 1 + le64_to_cpu(
523 pfindData->AllocationSize)) >> 9;
524 }
525 spin_unlock(&inode->i_lock);
526
527 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
528
529 /* BB fill in uid and gid here? with help from winbind?
530 or retrieve from NTFS stream extended attribute */
531 #ifdef CONFIG_CIFS_EXPERIMENTAL
532 /* fill in 0777 bits from ACL */
533 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
534 cFYI(1, ("Getting mode bits from ACL"));
535 acl_to_uid_mode(inode, search_path);
536 }
537 #endif
538 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
539 /* fill in remaining high mode bits e.g. SUID, VTX */
540 get_sfu_mode(inode, search_path, cifs_sb, xid);
541 } else if (atomic_read(&cifsInfo->inUse) == 0) {
542 inode->i_uid = cifs_sb->mnt_uid;
543 inode->i_gid = cifs_sb->mnt_gid;
544 /* set so we do not keep refreshing these fields with
545 bad data after user has changed them in memory */
546 atomic_set(&cifsInfo->inUse, 1);
547 }
548
549 if (S_ISREG(inode->i_mode)) {
550 cFYI(1, ("File inode"));
551 inode->i_op = &cifs_file_inode_ops;
552 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
553 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
554 inode->i_fop =
555 &cifs_file_direct_nobrl_ops;
556 else
557 inode->i_fop = &cifs_file_direct_ops;
558 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
559 inode->i_fop = &cifs_file_nobrl_ops;
560 else /* not direct, send byte range locks */
561 inode->i_fop = &cifs_file_ops;
562
563 if (pTcon->ses->server->maxBuf <
564 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
565 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
566 else
567 inode->i_data.a_ops = &cifs_addr_ops;
568 } else if (S_ISDIR(inode->i_mode)) {
569 cFYI(1, ("Directory inode"));
570 inode->i_op = &cifs_dir_inode_ops;
571 inode->i_fop = &cifs_dir_ops;
572 } else if (S_ISLNK(inode->i_mode)) {
573 cFYI(1, ("Symbolic Link inode"));
574 inode->i_op = &cifs_symlink_inode_ops;
575 } else {
576 init_special_inode(inode, inode->i_mode,
577 inode->i_rdev);
578 }
579 }
580 kfree(buf);
581 return rc;
582 }
583
584 static const struct inode_operations cifs_ipc_inode_ops = {
585 .lookup = cifs_lookup,
586 };
587
588 /* gets root inode */
589 void cifs_read_inode(struct inode *inode)
590 {
591 int xid, rc;
592 struct cifs_sb_info *cifs_sb;
593
594 cifs_sb = CIFS_SB(inode->i_sb);
595 xid = GetXid();
596
597 if (cifs_sb->tcon->unix_ext)
598 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
599 else
600 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
601 if (rc && cifs_sb->tcon->ipc) {
602 cFYI(1, ("ipc connection - fake read inode"));
603 inode->i_mode |= S_IFDIR;
604 inode->i_nlink = 2;
605 inode->i_op = &cifs_ipc_inode_ops;
606 inode->i_fop = &simple_dir_operations;
607 inode->i_uid = cifs_sb->mnt_uid;
608 inode->i_gid = cifs_sb->mnt_gid;
609 }
610
611 /* can not call macro FreeXid here since in a void func */
612 _FreeXid(xid);
613 }
614
615 int cifs_unlink(struct inode *inode, struct dentry *direntry)
616 {
617 int rc = 0;
618 int xid;
619 struct cifs_sb_info *cifs_sb;
620 struct cifsTconInfo *pTcon;
621 char *full_path = NULL;
622 struct cifsInodeInfo *cifsInode;
623 FILE_BASIC_INFO *pinfo_buf;
624
625 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
626
627 xid = GetXid();
628
629 if (inode)
630 cifs_sb = CIFS_SB(inode->i_sb);
631 else
632 cifs_sb = CIFS_SB(direntry->d_sb);
633 pTcon = cifs_sb->tcon;
634
635 /* Unlink can be called from rename so we can not grab the sem here
636 since we deadlock otherwise */
637 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
638 full_path = build_path_from_dentry(direntry);
639 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
640 if (full_path == NULL) {
641 FreeXid(xid);
642 return -ENOMEM;
643 }
644
645 if ((pTcon->ses->capabilities & CAP_UNIX) &&
646 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
647 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
648 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
649 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
650 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
651 cFYI(1, ("posix del rc %d", rc));
652 if ((rc == 0) || (rc == -ENOENT))
653 goto psx_del_no_retry;
654 }
655
656 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
657 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
658 psx_del_no_retry:
659 if (!rc) {
660 if (direntry->d_inode)
661 drop_nlink(direntry->d_inode);
662 } else if (rc == -ENOENT) {
663 d_drop(direntry);
664 } else if (rc == -ETXTBSY) {
665 int oplock = FALSE;
666 __u16 netfid;
667
668 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
669 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
670 &netfid, &oplock, NULL, cifs_sb->local_nls,
671 cifs_sb->mnt_cifs_flags &
672 CIFS_MOUNT_MAP_SPECIAL_CHR);
673 if (rc == 0) {
674 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
675 cifs_sb->local_nls,
676 cifs_sb->mnt_cifs_flags &
677 CIFS_MOUNT_MAP_SPECIAL_CHR);
678 CIFSSMBClose(xid, pTcon, netfid);
679 if (direntry->d_inode)
680 drop_nlink(direntry->d_inode);
681 }
682 } else if (rc == -EACCES) {
683 /* try only if r/o attribute set in local lookup data? */
684 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
685 if (pinfo_buf) {
686 /* ATTRS set to normal clears r/o bit */
687 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
688 if (!(pTcon->ses->flags & CIFS_SES_NT4))
689 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
690 pinfo_buf,
691 cifs_sb->local_nls,
692 cifs_sb->mnt_cifs_flags &
693 CIFS_MOUNT_MAP_SPECIAL_CHR);
694 else
695 rc = -EOPNOTSUPP;
696
697 if (rc == -EOPNOTSUPP) {
698 int oplock = FALSE;
699 __u16 netfid;
700 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
701 full_path,
702 (__u16)ATTR_NORMAL,
703 cifs_sb->local_nls);
704 For some strange reason it seems that NT4 eats the
705 old setattr call without actually setting the
706 attributes so on to the third attempted workaround
707 */
708
709 /* BB could scan to see if we already have it open
710 and pass in pid of opener to function */
711 rc = CIFSSMBOpen(xid, pTcon, full_path,
712 FILE_OPEN, SYNCHRONIZE |
713 FILE_WRITE_ATTRIBUTES, 0,
714 &netfid, &oplock, NULL,
715 cifs_sb->local_nls,
716 cifs_sb->mnt_cifs_flags &
717 CIFS_MOUNT_MAP_SPECIAL_CHR);
718 if (rc == 0) {
719 rc = CIFSSMBSetFileTimes(xid, pTcon,
720 pinfo_buf,
721 netfid);
722 CIFSSMBClose(xid, pTcon, netfid);
723 }
724 }
725 kfree(pinfo_buf);
726 }
727 if (rc == 0) {
728 rc = CIFSSMBDelFile(xid, pTcon, full_path,
729 cifs_sb->local_nls,
730 cifs_sb->mnt_cifs_flags &
731 CIFS_MOUNT_MAP_SPECIAL_CHR);
732 if (!rc) {
733 if (direntry->d_inode)
734 drop_nlink(direntry->d_inode);
735 } else if (rc == -ETXTBSY) {
736 int oplock = FALSE;
737 __u16 netfid;
738
739 rc = CIFSSMBOpen(xid, pTcon, full_path,
740 FILE_OPEN, DELETE,
741 CREATE_NOT_DIR |
742 CREATE_DELETE_ON_CLOSE,
743 &netfid, &oplock, NULL,
744 cifs_sb->local_nls,
745 cifs_sb->mnt_cifs_flags &
746 CIFS_MOUNT_MAP_SPECIAL_CHR);
747 if (rc == 0) {
748 CIFSSMBRenameOpenFile(xid, pTcon,
749 netfid, NULL,
750 cifs_sb->local_nls,
751 cifs_sb->mnt_cifs_flags &
752 CIFS_MOUNT_MAP_SPECIAL_CHR);
753 CIFSSMBClose(xid, pTcon, netfid);
754 if (direntry->d_inode)
755 drop_nlink(direntry->d_inode);
756 }
757 /* BB if rc = -ETXTBUSY goto the rename logic BB */
758 }
759 }
760 }
761 if (direntry->d_inode) {
762 cifsInode = CIFS_I(direntry->d_inode);
763 cifsInode->time = 0; /* will force revalidate to get info
764 when needed */
765 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
766 }
767 if (inode) {
768 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
769 cifsInode = CIFS_I(inode);
770 cifsInode->time = 0; /* force revalidate of dir as well */
771 }
772
773 kfree(full_path);
774 FreeXid(xid);
775 return rc;
776 }
777
778 static void posix_fill_in_inode(struct inode *tmp_inode,
779 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
780 {
781 loff_t local_size;
782 struct timespec local_mtime;
783
784 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
785 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
786
787 __u32 type = le32_to_cpu(pData->Type);
788 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
789 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
790 cifsInfo->time = jiffies;
791 atomic_inc(&cifsInfo->inUse);
792
793 /* save mtime and size */
794 local_mtime = tmp_inode->i_mtime;
795 local_size = tmp_inode->i_size;
796
797 tmp_inode->i_atime =
798 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
799 tmp_inode->i_mtime =
800 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
801 tmp_inode->i_ctime =
802 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
803
804 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
805 /* since we set the inode type below we need to mask off type
806 to avoid strange results if bits above were corrupt */
807 tmp_inode->i_mode &= ~S_IFMT;
808 if (type == UNIX_FILE) {
809 *pobject_type = DT_REG;
810 tmp_inode->i_mode |= S_IFREG;
811 } else if (type == UNIX_SYMLINK) {
812 *pobject_type = DT_LNK;
813 tmp_inode->i_mode |= S_IFLNK;
814 } else if (type == UNIX_DIR) {
815 *pobject_type = DT_DIR;
816 tmp_inode->i_mode |= S_IFDIR;
817 } else if (type == UNIX_CHARDEV) {
818 *pobject_type = DT_CHR;
819 tmp_inode->i_mode |= S_IFCHR;
820 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
821 le64_to_cpu(pData->DevMinor) & MINORMASK);
822 } else if (type == UNIX_BLOCKDEV) {
823 *pobject_type = DT_BLK;
824 tmp_inode->i_mode |= S_IFBLK;
825 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
826 le64_to_cpu(pData->DevMinor) & MINORMASK);
827 } else if (type == UNIX_FIFO) {
828 *pobject_type = DT_FIFO;
829 tmp_inode->i_mode |= S_IFIFO;
830 } else if (type == UNIX_SOCKET) {
831 *pobject_type = DT_SOCK;
832 tmp_inode->i_mode |= S_IFSOCK;
833 } else {
834 /* safest to just call it a file */
835 *pobject_type = DT_REG;
836 tmp_inode->i_mode |= S_IFREG;
837 cFYI(1, ("unknown inode type %d", type));
838 }
839
840 #ifdef CONFIG_CIFS_DEBUG2
841 cFYI(1, ("object type: %d", type));
842 #endif
843 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
844 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
845 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
846
847 spin_lock(&tmp_inode->i_lock);
848 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
849 /* can not safely change the file size here if the
850 client is writing to it due to potential races */
851 i_size_write(tmp_inode, end_of_file);
852
853 /* 512 bytes (2**9) is the fake blocksize that must be used */
854 /* for this calculation, not the real blocksize */
855 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
856 }
857 spin_unlock(&tmp_inode->i_lock);
858
859 if (S_ISREG(tmp_inode->i_mode)) {
860 cFYI(1, ("File inode"));
861 tmp_inode->i_op = &cifs_file_inode_ops;
862
863 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
864 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
865 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
866 else
867 tmp_inode->i_fop = &cifs_file_direct_ops;
868
869 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
870 tmp_inode->i_fop = &cifs_file_nobrl_ops;
871 else
872 tmp_inode->i_fop = &cifs_file_ops;
873
874 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
875 (cifs_sb->tcon->ses->server->maxBuf <
876 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
877 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
878 else
879 tmp_inode->i_data.a_ops = &cifs_addr_ops;
880
881 if (isNewInode)
882 return; /* No sense invalidating pages for new inode
883 since we we have not started caching
884 readahead file data yet */
885
886 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
887 (local_size == tmp_inode->i_size)) {
888 cFYI(1, ("inode exists but unchanged"));
889 } else {
890 /* file may have changed on server */
891 cFYI(1, ("invalidate inode, readdir detected change"));
892 invalidate_remote_inode(tmp_inode);
893 }
894 } else if (S_ISDIR(tmp_inode->i_mode)) {
895 cFYI(1, ("Directory inode"));
896 tmp_inode->i_op = &cifs_dir_inode_ops;
897 tmp_inode->i_fop = &cifs_dir_ops;
898 } else if (S_ISLNK(tmp_inode->i_mode)) {
899 cFYI(1, ("Symbolic Link inode"));
900 tmp_inode->i_op = &cifs_symlink_inode_ops;
901 /* tmp_inode->i_fop = *//* do not need to set to anything */
902 } else {
903 cFYI(1, ("Special inode"));
904 init_special_inode(tmp_inode, tmp_inode->i_mode,
905 tmp_inode->i_rdev);
906 }
907 }
908
909 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
910 {
911 int rc = 0;
912 int xid;
913 struct cifs_sb_info *cifs_sb;
914 struct cifsTconInfo *pTcon;
915 char *full_path = NULL;
916 struct inode *newinode = NULL;
917
918 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
919
920 xid = GetXid();
921
922 cifs_sb = CIFS_SB(inode->i_sb);
923 pTcon = cifs_sb->tcon;
924
925 full_path = build_path_from_dentry(direntry);
926 if (full_path == NULL) {
927 FreeXid(xid);
928 return -ENOMEM;
929 }
930
931 if ((pTcon->ses->capabilities & CAP_UNIX) &&
932 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
933 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
934 u32 oplock = 0;
935 FILE_UNIX_BASIC_INFO *pInfo =
936 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
937 if (pInfo == NULL) {
938 rc = -ENOMEM;
939 goto mkdir_out;
940 }
941
942 mode &= ~current->fs->umask;
943 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
944 mode, NULL /* netfid */, pInfo, &oplock,
945 full_path, cifs_sb->local_nls,
946 cifs_sb->mnt_cifs_flags &
947 CIFS_MOUNT_MAP_SPECIAL_CHR);
948 if (rc == -EOPNOTSUPP) {
949 kfree(pInfo);
950 goto mkdir_retry_old;
951 } else if (rc) {
952 cFYI(1, ("posix mkdir returned 0x%x", rc));
953 d_drop(direntry);
954 } else {
955 int obj_type;
956 if (pInfo->Type == cpu_to_le32(-1)) {
957 /* no return info, go query for it */
958 kfree(pInfo);
959 goto mkdir_get_info;
960 }
961 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
962 to set uid/gid */
963 inc_nlink(inode);
964 if (pTcon->nocase)
965 direntry->d_op = &cifs_ci_dentry_ops;
966 else
967 direntry->d_op = &cifs_dentry_ops;
968
969 newinode = new_inode(inode->i_sb);
970 if (newinode == NULL) {
971 kfree(pInfo);
972 goto mkdir_get_info;
973 }
974 /* Is an i_ino of zero legal? */
975 /* Are there sanity checks we can use to ensure that
976 the server is really filling in that field? */
977 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
978 newinode->i_ino =
979 (unsigned long)pInfo->UniqueId;
980 } /* note ino incremented to unique num in new_inode */
981 if (inode->i_sb->s_flags & MS_NOATIME)
982 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
983 newinode->i_nlink = 2;
984
985 insert_inode_hash(newinode);
986 d_instantiate(direntry, newinode);
987
988 /* we already checked in POSIXCreate whether
989 frame was long enough */
990 posix_fill_in_inode(direntry->d_inode,
991 pInfo, &obj_type, 1 /* NewInode */);
992 #ifdef CONFIG_CIFS_DEBUG2
993 cFYI(1, ("instantiated dentry %p %s to inode %p",
994 direntry, direntry->d_name.name, newinode));
995
996 if (newinode->i_nlink != 2)
997 cFYI(1, ("unexpected number of links %d",
998 newinode->i_nlink));
999 #endif
1000 }
1001 kfree(pInfo);
1002 goto mkdir_out;
1003 }
1004 mkdir_retry_old:
1005 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1006 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1007 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1008 if (rc) {
1009 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1010 d_drop(direntry);
1011 } else {
1012 mkdir_get_info:
1013 inc_nlink(inode);
1014 if (pTcon->unix_ext)
1015 rc = cifs_get_inode_info_unix(&newinode, full_path,
1016 inode->i_sb, xid);
1017 else
1018 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1019 inode->i_sb, xid);
1020
1021 if (pTcon->nocase)
1022 direntry->d_op = &cifs_ci_dentry_ops;
1023 else
1024 direntry->d_op = &cifs_dentry_ops;
1025 d_instantiate(direntry, newinode);
1026 /* setting nlink not necessary except in cases where we
1027 * failed to get it from the server or was set bogus */
1028 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1029 direntry->d_inode->i_nlink = 2;
1030 if (pTcon->unix_ext) {
1031 mode &= ~current->fs->umask;
1032 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1033 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1034 mode,
1035 (__u64)current->fsuid,
1036 (__u64)current->fsgid,
1037 0 /* dev_t */,
1038 cifs_sb->local_nls,
1039 cifs_sb->mnt_cifs_flags &
1040 CIFS_MOUNT_MAP_SPECIAL_CHR);
1041 } else {
1042 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1043 mode, (__u64)-1,
1044 (__u64)-1, 0 /* dev_t */,
1045 cifs_sb->local_nls,
1046 cifs_sb->mnt_cifs_flags &
1047 CIFS_MOUNT_MAP_SPECIAL_CHR);
1048 }
1049 } else {
1050 /* BB to be implemented via Windows secrty descriptors
1051 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1052 -1, -1, local_nls); */
1053 if (direntry->d_inode) {
1054 direntry->d_inode->i_mode = mode;
1055 direntry->d_inode->i_mode |= S_IFDIR;
1056 if (cifs_sb->mnt_cifs_flags &
1057 CIFS_MOUNT_SET_UID) {
1058 direntry->d_inode->i_uid =
1059 current->fsuid;
1060 direntry->d_inode->i_gid =
1061 current->fsgid;
1062 }
1063 }
1064 }
1065 }
1066 mkdir_out:
1067 kfree(full_path);
1068 FreeXid(xid);
1069 return rc;
1070 }
1071
1072 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1073 {
1074 int rc = 0;
1075 int xid;
1076 struct cifs_sb_info *cifs_sb;
1077 struct cifsTconInfo *pTcon;
1078 char *full_path = NULL;
1079 struct cifsInodeInfo *cifsInode;
1080
1081 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1082
1083 xid = GetXid();
1084
1085 cifs_sb = CIFS_SB(inode->i_sb);
1086 pTcon = cifs_sb->tcon;
1087
1088 full_path = build_path_from_dentry(direntry);
1089 if (full_path == NULL) {
1090 FreeXid(xid);
1091 return -ENOMEM;
1092 }
1093
1094 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1095 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1096
1097 if (!rc) {
1098 drop_nlink(inode);
1099 spin_lock(&direntry->d_inode->i_lock);
1100 i_size_write(direntry->d_inode, 0);
1101 clear_nlink(direntry->d_inode);
1102 spin_unlock(&direntry->d_inode->i_lock);
1103 }
1104
1105 cifsInode = CIFS_I(direntry->d_inode);
1106 cifsInode->time = 0; /* force revalidate to go get info when
1107 needed */
1108 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1109 current_fs_time(inode->i_sb);
1110
1111 kfree(full_path);
1112 FreeXid(xid);
1113 return rc;
1114 }
1115
1116 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1117 struct inode *target_inode, struct dentry *target_direntry)
1118 {
1119 char *fromName;
1120 char *toName;
1121 struct cifs_sb_info *cifs_sb_source;
1122 struct cifs_sb_info *cifs_sb_target;
1123 struct cifsTconInfo *pTcon;
1124 int xid;
1125 int rc = 0;
1126
1127 xid = GetXid();
1128
1129 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1130 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1131 pTcon = cifs_sb_source->tcon;
1132
1133 if (pTcon != cifs_sb_target->tcon) {
1134 FreeXid(xid);
1135 return -EXDEV; /* BB actually could be allowed if same server,
1136 but different share.
1137 Might eventually add support for this */
1138 }
1139
1140 /* we already have the rename sem so we do not need to grab it again
1141 here to protect the path integrity */
1142 fromName = build_path_from_dentry(source_direntry);
1143 toName = build_path_from_dentry(target_direntry);
1144 if ((fromName == NULL) || (toName == NULL)) {
1145 rc = -ENOMEM;
1146 goto cifs_rename_exit;
1147 }
1148
1149 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1150 cifs_sb_source->local_nls,
1151 cifs_sb_source->mnt_cifs_flags &
1152 CIFS_MOUNT_MAP_SPECIAL_CHR);
1153 if (rc == -EEXIST) {
1154 /* check if they are the same file because rename of hardlinked
1155 files is a noop */
1156 FILE_UNIX_BASIC_INFO *info_buf_source;
1157 FILE_UNIX_BASIC_INFO *info_buf_target;
1158
1159 info_buf_source =
1160 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1161 if (info_buf_source != NULL) {
1162 info_buf_target = info_buf_source + 1;
1163 if (pTcon->unix_ext)
1164 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1165 info_buf_source,
1166 cifs_sb_source->local_nls,
1167 cifs_sb_source->mnt_cifs_flags &
1168 CIFS_MOUNT_MAP_SPECIAL_CHR);
1169 /* else rc is still EEXIST so will fall through to
1170 unlink the target and retry rename */
1171 if (rc == 0) {
1172 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1173 info_buf_target,
1174 cifs_sb_target->local_nls,
1175 /* remap based on source sb */
1176 cifs_sb_source->mnt_cifs_flags &
1177 CIFS_MOUNT_MAP_SPECIAL_CHR);
1178 }
1179 if ((rc == 0) &&
1180 (info_buf_source->UniqueId ==
1181 info_buf_target->UniqueId)) {
1182 /* do not rename since the files are hardlinked which
1183 is a noop */
1184 } else {
1185 /* we either can not tell the files are hardlinked
1186 (as with Windows servers) or files are not
1187 hardlinked so delete the target manually before
1188 renaming to follow POSIX rather than Windows
1189 semantics */
1190 cifs_unlink(target_inode, target_direntry);
1191 rc = CIFSSMBRename(xid, pTcon, fromName,
1192 toName,
1193 cifs_sb_source->local_nls,
1194 cifs_sb_source->mnt_cifs_flags
1195 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1196 }
1197 kfree(info_buf_source);
1198 } /* if we can not get memory just leave rc as EEXIST */
1199 }
1200
1201 if (rc) {
1202 cFYI(1, ("rename rc %d", rc));
1203 }
1204
1205 if ((rc == -EIO) || (rc == -EEXIST)) {
1206 int oplock = FALSE;
1207 __u16 netfid;
1208
1209 /* BB FIXME Is Generic Read correct for rename? */
1210 /* if renaming directory - we should not say CREATE_NOT_DIR,
1211 need to test renaming open directory, also GENERIC_READ
1212 might not right be right access to request */
1213 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1214 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1215 cifs_sb_source->local_nls,
1216 cifs_sb_source->mnt_cifs_flags &
1217 CIFS_MOUNT_MAP_SPECIAL_CHR);
1218 if (rc == 0) {
1219 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1220 cifs_sb_source->local_nls,
1221 cifs_sb_source->mnt_cifs_flags &
1222 CIFS_MOUNT_MAP_SPECIAL_CHR);
1223 CIFSSMBClose(xid, pTcon, netfid);
1224 }
1225 }
1226
1227 cifs_rename_exit:
1228 kfree(fromName);
1229 kfree(toName);
1230 FreeXid(xid);
1231 return rc;
1232 }
1233
1234 int cifs_revalidate(struct dentry *direntry)
1235 {
1236 int xid;
1237 int rc = 0, wbrc = 0;
1238 char *full_path;
1239 struct cifs_sb_info *cifs_sb;
1240 struct cifsInodeInfo *cifsInode;
1241 loff_t local_size;
1242 struct timespec local_mtime;
1243 int invalidate_inode = FALSE;
1244
1245 if (direntry->d_inode == NULL)
1246 return -ENOENT;
1247
1248 cifsInode = CIFS_I(direntry->d_inode);
1249
1250 if (cifsInode == NULL)
1251 return -ENOENT;
1252
1253 /* no sense revalidating inode info on file that no one can write */
1254 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1255 return rc;
1256
1257 xid = GetXid();
1258
1259 cifs_sb = CIFS_SB(direntry->d_sb);
1260
1261 /* can not safely grab the rename sem here if rename calls revalidate
1262 since that would deadlock */
1263 full_path = build_path_from_dentry(direntry);
1264 if (full_path == NULL) {
1265 FreeXid(xid);
1266 return -ENOMEM;
1267 }
1268 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1269 "jiffies %ld", full_path, direntry->d_inode,
1270 direntry->d_inode->i_count.counter, direntry,
1271 direntry->d_time, jiffies));
1272
1273 if (cifsInode->time == 0) {
1274 /* was set to zero previously to force revalidate */
1275 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1276 lookupCacheEnabled) {
1277 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1278 (direntry->d_inode->i_nlink == 1)) {
1279 kfree(full_path);
1280 FreeXid(xid);
1281 return rc;
1282 } else {
1283 cFYI(1, ("Have to revalidate file due to hardlinks"));
1284 }
1285 }
1286
1287 /* save mtime and size */
1288 local_mtime = direntry->d_inode->i_mtime;
1289 local_size = direntry->d_inode->i_size;
1290
1291 if (cifs_sb->tcon->unix_ext) {
1292 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1293 direntry->d_sb, xid);
1294 if (rc) {
1295 cFYI(1, ("error on getting revalidate info %d", rc));
1296 /* if (rc != -ENOENT)
1297 rc = 0; */ /* BB should we cache info on
1298 certain errors? */
1299 }
1300 } else {
1301 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1302 direntry->d_sb, xid);
1303 if (rc) {
1304 cFYI(1, ("error on getting revalidate info %d", rc));
1305 /* if (rc != -ENOENT)
1306 rc = 0; */ /* BB should we cache info on
1307 certain errors? */
1308 }
1309 }
1310 /* should we remap certain errors, access denied?, to zero */
1311
1312 /* if not oplocked, we invalidate inode pages if mtime or file size
1313 had changed on server */
1314
1315 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1316 (local_size == direntry->d_inode->i_size)) {
1317 cFYI(1, ("cifs_revalidate - inode unchanged"));
1318 } else {
1319 /* file may have changed on server */
1320 if (cifsInode->clientCanCacheRead) {
1321 /* no need to invalidate inode pages since we were the
1322 only ones who could have modified the file and the
1323 server copy is staler than ours */
1324 } else {
1325 invalidate_inode = TRUE;
1326 }
1327 }
1328
1329 /* can not grab this sem since kernel filesys locking documentation
1330 indicates i_mutex may be taken by the kernel on lookup and rename
1331 which could deadlock if we grab the i_mutex here as well */
1332 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1333 /* need to write out dirty pages here */
1334 if (direntry->d_inode->i_mapping) {
1335 /* do we need to lock inode until after invalidate completes
1336 below? */
1337 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1338 if (wbrc)
1339 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1340 }
1341 if (invalidate_inode) {
1342 /* shrink_dcache not necessary now that cifs dentry ops
1343 are exported for negative dentries */
1344 /* if (S_ISDIR(direntry->d_inode->i_mode))
1345 shrink_dcache_parent(direntry); */
1346 if (S_ISREG(direntry->d_inode->i_mode)) {
1347 if (direntry->d_inode->i_mapping)
1348 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1349 if (wbrc)
1350 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1351 /* may eventually have to do this for open files too */
1352 if (list_empty(&(cifsInode->openFileList))) {
1353 /* changed on server - flush read ahead pages */
1354 cFYI(1, ("Invalidating read ahead data on "
1355 "closed file"));
1356 invalidate_remote_inode(direntry->d_inode);
1357 }
1358 }
1359 }
1360 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1361
1362 kfree(full_path);
1363 FreeXid(xid);
1364 return rc;
1365 }
1366
1367 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1368 struct kstat *stat)
1369 {
1370 int err = cifs_revalidate(dentry);
1371 if (!err) {
1372 generic_fillattr(dentry->d_inode, stat);
1373 stat->blksize = CIFS_MAX_MSGSIZE;
1374 }
1375 return err;
1376 }
1377
1378 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1379 {
1380 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1381 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1382 struct page *page;
1383 int rc = 0;
1384
1385 page = grab_cache_page(mapping, index);
1386 if (!page)
1387 return -ENOMEM;
1388
1389 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1390 unlock_page(page);
1391 page_cache_release(page);
1392 return rc;
1393 }
1394
1395 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1396 {
1397 struct address_space *mapping = inode->i_mapping;
1398 unsigned long limit;
1399
1400 spin_lock(&inode->i_lock);
1401 if (inode->i_size < offset)
1402 goto do_expand;
1403 /*
1404 * truncation of in-use swapfiles is disallowed - it would cause
1405 * subsequent swapout to scribble on the now-freed blocks.
1406 */
1407 if (IS_SWAPFILE(inode)) {
1408 spin_unlock(&inode->i_lock);
1409 goto out_busy;
1410 }
1411 i_size_write(inode, offset);
1412 spin_unlock(&inode->i_lock);
1413 /*
1414 * unmap_mapping_range is called twice, first simply for efficiency
1415 * so that truncate_inode_pages does fewer single-page unmaps. However
1416 * after this first call, and before truncate_inode_pages finishes,
1417 * it is possible for private pages to be COWed, which remain after
1418 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1419 * call must be made for correctness.
1420 */
1421 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1422 truncate_inode_pages(mapping, offset);
1423 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1424 goto out_truncate;
1425
1426 do_expand:
1427 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1428 if (limit != RLIM_INFINITY && offset > limit) {
1429 spin_unlock(&inode->i_lock);
1430 goto out_sig;
1431 }
1432 if (offset > inode->i_sb->s_maxbytes) {
1433 spin_unlock(&inode->i_lock);
1434 goto out_big;
1435 }
1436 i_size_write(inode, offset);
1437 spin_unlock(&inode->i_lock);
1438 out_truncate:
1439 if (inode->i_op && inode->i_op->truncate)
1440 inode->i_op->truncate(inode);
1441 return 0;
1442 out_sig:
1443 send_sig(SIGXFSZ, current, 0);
1444 out_big:
1445 return -EFBIG;
1446 out_busy:
1447 return -ETXTBSY;
1448 }
1449
1450 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1451 {
1452 int xid;
1453 struct cifs_sb_info *cifs_sb;
1454 struct cifsTconInfo *pTcon;
1455 char *full_path = NULL;
1456 int rc = -EACCES;
1457 struct cifsFileInfo *open_file = NULL;
1458 FILE_BASIC_INFO time_buf;
1459 int set_time = FALSE;
1460 int set_dosattr = FALSE;
1461 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1462 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1463 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1464 struct cifsInodeInfo *cifsInode;
1465
1466 xid = GetXid();
1467
1468 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1469 direntry->d_name.name, attrs->ia_valid));
1470
1471 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1472 pTcon = cifs_sb->tcon;
1473
1474 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1475 /* check if we have permission to change attrs */
1476 rc = inode_change_ok(direntry->d_inode, attrs);
1477 if (rc < 0) {
1478 FreeXid(xid);
1479 return rc;
1480 } else
1481 rc = 0;
1482 }
1483
1484 full_path = build_path_from_dentry(direntry);
1485 if (full_path == NULL) {
1486 FreeXid(xid);
1487 return -ENOMEM;
1488 }
1489 cifsInode = CIFS_I(direntry->d_inode);
1490
1491 /* BB check if we need to refresh inode from server now ? BB */
1492
1493 if (attrs->ia_valid & ATTR_SIZE) {
1494 /*
1495 Flush data before changing file size on server. If the
1496 flush returns error, store it to report later and continue.
1497 BB: This should be smarter. Why bother flushing pages that
1498 will be truncated anyway? Also, should we error out here if
1499 the flush returns error?
1500 */
1501 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1502 if (rc != 0) {
1503 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1504 rc = 0;
1505 }
1506
1507 /* To avoid spurious oplock breaks from server, in the case of
1508 inodes that we already have open, avoid doing path based
1509 setting of file size if we can do it by handle.
1510 This keeps our caching token (oplock) and avoids timeouts
1511 when the local oplock break takes longer to flush
1512 writebehind data than the SMB timeout for the SetPathInfo
1513 request would allow */
1514
1515 open_file = find_writable_file(cifsInode);
1516 if (open_file) {
1517 __u16 nfid = open_file->netfid;
1518 __u32 npid = open_file->pid;
1519 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1520 nfid, npid, FALSE);
1521 atomic_dec(&open_file->wrtPending);
1522 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1523 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1524 unsigned int bytes_written;
1525 rc = CIFSSMBWrite(xid, pTcon,
1526 nfid, 0, attrs->ia_size,
1527 &bytes_written, NULL, NULL,
1528 1 /* 45 seconds */);
1529 cFYI(1, ("Wrt seteof rc %d", rc));
1530 }
1531 } else
1532 rc = -EINVAL;
1533
1534 if (rc != 0) {
1535 /* Set file size by pathname rather than by handle
1536 either because no valid, writeable file handle for
1537 it was found or because there was an error setting
1538 it by handle */
1539 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1540 attrs->ia_size, FALSE,
1541 cifs_sb->local_nls,
1542 cifs_sb->mnt_cifs_flags &
1543 CIFS_MOUNT_MAP_SPECIAL_CHR);
1544 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1545 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1546 __u16 netfid;
1547 int oplock = FALSE;
1548
1549 rc = SMBLegacyOpen(xid, pTcon, full_path,
1550 FILE_OPEN,
1551 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1552 CREATE_NOT_DIR, &netfid, &oplock,
1553 NULL, cifs_sb->local_nls,
1554 cifs_sb->mnt_cifs_flags &
1555 CIFS_MOUNT_MAP_SPECIAL_CHR);
1556 if (rc == 0) {
1557 unsigned int bytes_written;
1558 rc = CIFSSMBWrite(xid, pTcon,
1559 netfid, 0,
1560 attrs->ia_size,
1561 &bytes_written, NULL,
1562 NULL, 1 /* 45 sec */);
1563 cFYI(1, ("wrt seteof rc %d", rc));
1564 CIFSSMBClose(xid, pTcon, netfid);
1565 }
1566
1567 }
1568 }
1569
1570 /* Server is ok setting allocation size implicitly - no need
1571 to call:
1572 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1573 cifs_sb->local_nls);
1574 */
1575
1576 if (rc == 0) {
1577 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1578 cifs_truncate_page(direntry->d_inode->i_mapping,
1579 direntry->d_inode->i_size);
1580 } else
1581 goto cifs_setattr_exit;
1582 }
1583 if (attrs->ia_valid & ATTR_UID) {
1584 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1585 uid = attrs->ia_uid;
1586 }
1587 if (attrs->ia_valid & ATTR_GID) {
1588 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1589 gid = attrs->ia_gid;
1590 }
1591
1592 time_buf.Attributes = 0;
1593
1594 /* skip mode change if it's just for clearing setuid/setgid */
1595 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1596 attrs->ia_valid &= ~ATTR_MODE;
1597
1598 if (attrs->ia_valid & ATTR_MODE) {
1599 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1600 mode = attrs->ia_mode;
1601 }
1602
1603 if ((pTcon->unix_ext)
1604 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1605 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1606 0 /* dev_t */, cifs_sb->local_nls,
1607 cifs_sb->mnt_cifs_flags &
1608 CIFS_MOUNT_MAP_SPECIAL_CHR);
1609 else if (attrs->ia_valid & ATTR_MODE) {
1610 rc = 0;
1611 #ifdef CONFIG_CIFS_EXPERIMENTAL
1612 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1613 rc = mode_to_acl(direntry->d_inode, full_path, mode);
1614 else if ((mode & S_IWUGO) == 0) {
1615 #else
1616 if ((mode & S_IWUGO) == 0) {
1617 #endif
1618 /* not writeable */
1619 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1620 set_dosattr = TRUE;
1621 time_buf.Attributes =
1622 cpu_to_le32(cifsInode->cifsAttrs |
1623 ATTR_READONLY);
1624 }
1625 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1626 /* If file is readonly on server, we would
1627 not be able to write to it - so if any write
1628 bit is enabled for user or group or other we
1629 need to at least try to remove r/o dos attr */
1630 set_dosattr = TRUE;
1631 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1632 (~ATTR_READONLY));
1633 /* Windows ignores set to zero */
1634 if (time_buf.Attributes == 0)
1635 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1636 }
1637 #ifdef CONFIG_CIFS_EXPERIMENTAL
1638 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1639 mode_to_acl(direntry->d_inode, full_path, mode);
1640 #endif
1641 }
1642
1643 if (attrs->ia_valid & ATTR_ATIME) {
1644 set_time = TRUE;
1645 time_buf.LastAccessTime =
1646 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1647 } else
1648 time_buf.LastAccessTime = 0;
1649
1650 if (attrs->ia_valid & ATTR_MTIME) {
1651 set_time = TRUE;
1652 time_buf.LastWriteTime =
1653 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1654 } else
1655 time_buf.LastWriteTime = 0;
1656 /* Do not set ctime explicitly unless other time
1657 stamps are changed explicitly (i.e. by utime()
1658 since we would then have a mix of client and
1659 server times */
1660
1661 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1662 set_time = TRUE;
1663 /* Although Samba throws this field away
1664 it may be useful to Windows - but we do
1665 not want to set ctime unless some other
1666 timestamp is changing */
1667 cFYI(1, ("CIFS - CTIME changed"));
1668 time_buf.ChangeTime =
1669 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1670 } else
1671 time_buf.ChangeTime = 0;
1672
1673 if (set_time || set_dosattr) {
1674 time_buf.CreationTime = 0; /* do not change */
1675 /* In the future we should experiment - try setting timestamps
1676 via Handle (SetFileInfo) instead of by path */
1677 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1678 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1679 cifs_sb->local_nls,
1680 cifs_sb->mnt_cifs_flags &
1681 CIFS_MOUNT_MAP_SPECIAL_CHR);
1682 else
1683 rc = -EOPNOTSUPP;
1684
1685 if (rc == -EOPNOTSUPP) {
1686 int oplock = FALSE;
1687 __u16 netfid;
1688
1689 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1690 "times not supported by this server"));
1691 /* BB we could scan to see if we already have it open
1692 and pass in pid of opener to function */
1693 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1694 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1695 CREATE_NOT_DIR, &netfid, &oplock,
1696 NULL, cifs_sb->local_nls,
1697 cifs_sb->mnt_cifs_flags &
1698 CIFS_MOUNT_MAP_SPECIAL_CHR);
1699 if (rc == 0) {
1700 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1701 netfid);
1702 CIFSSMBClose(xid, pTcon, netfid);
1703 } else {
1704 /* BB For even older servers we could convert time_buf
1705 into old DOS style which uses two second
1706 granularity */
1707
1708 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1709 &time_buf, cifs_sb->local_nls); */
1710 }
1711 }
1712 /* Even if error on time set, no sense failing the call if
1713 the server would set the time to a reasonable value anyway,
1714 and this check ensures that we are not being called from
1715 sys_utimes in which case we ought to fail the call back to
1716 the user when the server rejects the call */
1717 if ((rc) && (attrs->ia_valid &
1718 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1719 rc = 0;
1720 }
1721
1722 /* do not need local check to inode_check_ok since the server does
1723 that */
1724 if (!rc)
1725 rc = inode_setattr(direntry->d_inode, attrs);
1726 cifs_setattr_exit:
1727 kfree(full_path);
1728 FreeXid(xid);
1729 return rc;
1730 }
1731
1732 #if 0
1733 void cifs_delete_inode(struct inode *inode)
1734 {
1735 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1736 /* may have to add back in if and when safe distributed caching of
1737 directories added e.g. via FindNotify */
1738 }
1739 #endif
WRT350N Kernel Patches