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[POWERPC] Make ibmebus use of_(un)register_driver
[wrt350n-kernel.git] / fs / cifs / inode.c
blobe915eb1d2e6608f659e9e49ad09d4689249fabb5
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, le64_to_cpu(pfindData->EndOfFile))) {
515 /* can not safely shrink the file size here if the
516 client is writing to it due to potential races */
517 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
518
519 /* 512 bytes (2**9) is the fake blocksize that must be
520 used for this calculation */
521 inode->i_blocks = (512 - 1 + le64_to_cpu(
522 pfindData->AllocationSize)) >> 9;
523 }
524 spin_unlock(&inode->i_lock);
525
526 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
527
528 /* BB fill in uid and gid here? with help from winbind?
529 or retrieve from NTFS stream extended attribute */
530 #ifdef CONFIG_CIFS_EXPERIMENTAL
531 /* fill in 0777 bits from ACL */
532 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
533 cFYI(1, ("Getting mode bits from ACL"));
534 acl_to_uid_mode(inode, search_path);
535 }
536 #endif
537 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
538 /* fill in remaining high mode bits e.g. SUID, VTX */
539 get_sfu_mode(inode, search_path, cifs_sb, xid);
540 } else if (atomic_read(&cifsInfo->inUse) == 0) {
541 inode->i_uid = cifs_sb->mnt_uid;
542 inode->i_gid = cifs_sb->mnt_gid;
543 /* set so we do not keep refreshing these fields with
544 bad data after user has changed them in memory */
545 atomic_set(&cifsInfo->inUse, 1);
546 }
547
548 if (S_ISREG(inode->i_mode)) {
549 cFYI(1, ("File inode"));
550 inode->i_op = &cifs_file_inode_ops;
551 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
552 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
553 inode->i_fop =
554 &cifs_file_direct_nobrl_ops;
555 else
556 inode->i_fop = &cifs_file_direct_ops;
557 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
558 inode->i_fop = &cifs_file_nobrl_ops;
559 else /* not direct, send byte range locks */
560 inode->i_fop = &cifs_file_ops;
561
562 if (pTcon->ses->server->maxBuf <
563 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
564 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
565 else
566 inode->i_data.a_ops = &cifs_addr_ops;
567 } else if (S_ISDIR(inode->i_mode)) {
568 cFYI(1, ("Directory inode"));
569 inode->i_op = &cifs_dir_inode_ops;
570 inode->i_fop = &cifs_dir_ops;
571 } else if (S_ISLNK(inode->i_mode)) {
572 cFYI(1, ("Symbolic Link inode"));
573 inode->i_op = &cifs_symlink_inode_ops;
574 } else {
575 init_special_inode(inode, inode->i_mode,
576 inode->i_rdev);
577 }
578 }
579 kfree(buf);
580 return rc;
581 }
582
583 static const struct inode_operations cifs_ipc_inode_ops = {
584 .lookup = cifs_lookup,
585 };
586
587 /* gets root inode */
588 void cifs_read_inode(struct inode *inode)
589 {
590 int xid, rc;
591 struct cifs_sb_info *cifs_sb;
592
593 cifs_sb = CIFS_SB(inode->i_sb);
594 xid = GetXid();
595
596 if (cifs_sb->tcon->unix_ext)
597 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
598 else
599 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
600 if (rc && cifs_sb->tcon->ipc) {
601 cFYI(1, ("ipc connection - fake read inode"));
602 inode->i_mode |= S_IFDIR;
603 inode->i_nlink = 2;
604 inode->i_op = &cifs_ipc_inode_ops;
605 inode->i_fop = &simple_dir_operations;
606 inode->i_uid = cifs_sb->mnt_uid;
607 inode->i_gid = cifs_sb->mnt_gid;
608 }
609
610 /* can not call macro FreeXid here since in a void func */
611 _FreeXid(xid);
612 }
613
614 int cifs_unlink(struct inode *inode, struct dentry *direntry)
615 {
616 int rc = 0;
617 int xid;
618 struct cifs_sb_info *cifs_sb;
619 struct cifsTconInfo *pTcon;
620 char *full_path = NULL;
621 struct cifsInodeInfo *cifsInode;
622 FILE_BASIC_INFO *pinfo_buf;
623
624 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
625
626 xid = GetXid();
627
628 if (inode)
629 cifs_sb = CIFS_SB(inode->i_sb);
630 else
631 cifs_sb = CIFS_SB(direntry->d_sb);
632 pTcon = cifs_sb->tcon;
633
634 /* Unlink can be called from rename so we can not grab the sem here
635 since we deadlock otherwise */
636 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
637 full_path = build_path_from_dentry(direntry);
638 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
639 if (full_path == NULL) {
640 FreeXid(xid);
641 return -ENOMEM;
642 }
643
644 if ((pTcon->ses->capabilities & CAP_UNIX) &&
645 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
646 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
647 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
648 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
649 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
650 cFYI(1, ("posix del rc %d", rc));
651 if ((rc == 0) || (rc == -ENOENT))
652 goto psx_del_no_retry;
653 }
654
655 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
656 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
657 psx_del_no_retry:
658 if (!rc) {
659 if (direntry->d_inode)
660 drop_nlink(direntry->d_inode);
661 } else if (rc == -ENOENT) {
662 d_drop(direntry);
663 } else if (rc == -ETXTBSY) {
664 int oplock = FALSE;
665 __u16 netfid;
666
667 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
668 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
669 &netfid, &oplock, NULL, cifs_sb->local_nls,
670 cifs_sb->mnt_cifs_flags &
671 CIFS_MOUNT_MAP_SPECIAL_CHR);
672 if (rc == 0) {
673 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
674 cifs_sb->local_nls,
675 cifs_sb->mnt_cifs_flags &
676 CIFS_MOUNT_MAP_SPECIAL_CHR);
677 CIFSSMBClose(xid, pTcon, netfid);
678 if (direntry->d_inode)
679 drop_nlink(direntry->d_inode);
680 }
681 } else if (rc == -EACCES) {
682 /* try only if r/o attribute set in local lookup data? */
683 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
684 if (pinfo_buf) {
685 /* ATTRS set to normal clears r/o bit */
686 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
687 if (!(pTcon->ses->flags & CIFS_SES_NT4))
688 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
689 pinfo_buf,
690 cifs_sb->local_nls,
691 cifs_sb->mnt_cifs_flags &
692 CIFS_MOUNT_MAP_SPECIAL_CHR);
693 else
694 rc = -EOPNOTSUPP;
695
696 if (rc == -EOPNOTSUPP) {
697 int oplock = FALSE;
698 __u16 netfid;
699 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
700 full_path,
701 (__u16)ATTR_NORMAL,
702 cifs_sb->local_nls);
703 For some strange reason it seems that NT4 eats the
704 old setattr call without actually setting the
705 attributes so on to the third attempted workaround
706 */
707
708 /* BB could scan to see if we already have it open
709 and pass in pid of opener to function */
710 rc = CIFSSMBOpen(xid, pTcon, full_path,
711 FILE_OPEN, SYNCHRONIZE |
712 FILE_WRITE_ATTRIBUTES, 0,
713 &netfid, &oplock, NULL,
714 cifs_sb->local_nls,
715 cifs_sb->mnt_cifs_flags &
716 CIFS_MOUNT_MAP_SPECIAL_CHR);
717 if (rc == 0) {
718 rc = CIFSSMBSetFileTimes(xid, pTcon,
719 pinfo_buf,
720 netfid);
721 CIFSSMBClose(xid, pTcon, netfid);
722 }
723 }
724 kfree(pinfo_buf);
725 }
726 if (rc == 0) {
727 rc = CIFSSMBDelFile(xid, pTcon, full_path,
728 cifs_sb->local_nls,
729 cifs_sb->mnt_cifs_flags &
730 CIFS_MOUNT_MAP_SPECIAL_CHR);
731 if (!rc) {
732 if (direntry->d_inode)
733 drop_nlink(direntry->d_inode);
734 } else if (rc == -ETXTBSY) {
735 int oplock = FALSE;
736 __u16 netfid;
737
738 rc = CIFSSMBOpen(xid, pTcon, full_path,
739 FILE_OPEN, DELETE,
740 CREATE_NOT_DIR |
741 CREATE_DELETE_ON_CLOSE,
742 &netfid, &oplock, NULL,
743 cifs_sb->local_nls,
744 cifs_sb->mnt_cifs_flags &
745 CIFS_MOUNT_MAP_SPECIAL_CHR);
746 if (rc == 0) {
747 CIFSSMBRenameOpenFile(xid, pTcon,
748 netfid, NULL,
749 cifs_sb->local_nls,
750 cifs_sb->mnt_cifs_flags &
751 CIFS_MOUNT_MAP_SPECIAL_CHR);
752 CIFSSMBClose(xid, pTcon, netfid);
753 if (direntry->d_inode)
754 drop_nlink(direntry->d_inode);
755 }
756 /* BB if rc = -ETXTBUSY goto the rename logic BB */
757 }
758 }
759 }
760 if (direntry->d_inode) {
761 cifsInode = CIFS_I(direntry->d_inode);
762 cifsInode->time = 0; /* will force revalidate to get info
763 when needed */
764 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
765 }
766 if (inode) {
767 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
768 cifsInode = CIFS_I(inode);
769 cifsInode->time = 0; /* force revalidate of dir as well */
770 }
771
772 kfree(full_path);
773 FreeXid(xid);
774 return rc;
775 }
776
777 static void posix_fill_in_inode(struct inode *tmp_inode,
778 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
779 {
780 loff_t local_size;
781 struct timespec local_mtime;
782
783 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
784 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
785
786 __u32 type = le32_to_cpu(pData->Type);
787 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
788 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
789 cifsInfo->time = jiffies;
790 atomic_inc(&cifsInfo->inUse);
791
792 /* save mtime and size */
793 local_mtime = tmp_inode->i_mtime;
794 local_size = tmp_inode->i_size;
795
796 tmp_inode->i_atime =
797 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
798 tmp_inode->i_mtime =
799 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
800 tmp_inode->i_ctime =
801 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
802
803 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
804 /* since we set the inode type below we need to mask off type
805 to avoid strange results if bits above were corrupt */
806 tmp_inode->i_mode &= ~S_IFMT;
807 if (type == UNIX_FILE) {
808 *pobject_type = DT_REG;
809 tmp_inode->i_mode |= S_IFREG;
810 } else if (type == UNIX_SYMLINK) {
811 *pobject_type = DT_LNK;
812 tmp_inode->i_mode |= S_IFLNK;
813 } else if (type == UNIX_DIR) {
814 *pobject_type = DT_DIR;
815 tmp_inode->i_mode |= S_IFDIR;
816 } else if (type == UNIX_CHARDEV) {
817 *pobject_type = DT_CHR;
818 tmp_inode->i_mode |= S_IFCHR;
819 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
820 le64_to_cpu(pData->DevMinor) & MINORMASK);
821 } else if (type == UNIX_BLOCKDEV) {
822 *pobject_type = DT_BLK;
823 tmp_inode->i_mode |= S_IFBLK;
824 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
825 le64_to_cpu(pData->DevMinor) & MINORMASK);
826 } else if (type == UNIX_FIFO) {
827 *pobject_type = DT_FIFO;
828 tmp_inode->i_mode |= S_IFIFO;
829 } else if (type == UNIX_SOCKET) {
830 *pobject_type = DT_SOCK;
831 tmp_inode->i_mode |= S_IFSOCK;
832 } else {
833 /* safest to just call it a file */
834 *pobject_type = DT_REG;
835 tmp_inode->i_mode |= S_IFREG;
836 cFYI(1, ("unknown inode type %d", type));
837 }
838
839 #ifdef CONFIG_CIFS_DEBUG2
840 cFYI(1, ("object type: %d", type));
841 #endif
842 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
843 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
844 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
845
846 spin_lock(&tmp_inode->i_lock);
847 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
848 /* can not safely change the file size here if the
849 client is writing to it due to potential races */
850 i_size_write(tmp_inode, end_of_file);
851
852 /* 512 bytes (2**9) is the fake blocksize that must be used */
853 /* for this calculation, not the real blocksize */
854 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
855 }
856 spin_unlock(&tmp_inode->i_lock);
857
858 if (S_ISREG(tmp_inode->i_mode)) {
859 cFYI(1, ("File inode"));
860 tmp_inode->i_op = &cifs_file_inode_ops;
861
862 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
863 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
864 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
865 else
866 tmp_inode->i_fop = &cifs_file_direct_ops;
867
868 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
869 tmp_inode->i_fop = &cifs_file_nobrl_ops;
870 else
871 tmp_inode->i_fop = &cifs_file_ops;
872
873 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
874 (cifs_sb->tcon->ses->server->maxBuf <
875 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
876 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
877 else
878 tmp_inode->i_data.a_ops = &cifs_addr_ops;
879
880 if (isNewInode)
881 return; /* No sense invalidating pages for new inode
882 since we we have not started caching
883 readahead file data yet */
884
885 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
886 (local_size == tmp_inode->i_size)) {
887 cFYI(1, ("inode exists but unchanged"));
888 } else {
889 /* file may have changed on server */
890 cFYI(1, ("invalidate inode, readdir detected change"));
891 invalidate_remote_inode(tmp_inode);
892 }
893 } else if (S_ISDIR(tmp_inode->i_mode)) {
894 cFYI(1, ("Directory inode"));
895 tmp_inode->i_op = &cifs_dir_inode_ops;
896 tmp_inode->i_fop = &cifs_dir_ops;
897 } else if (S_ISLNK(tmp_inode->i_mode)) {
898 cFYI(1, ("Symbolic Link inode"));
899 tmp_inode->i_op = &cifs_symlink_inode_ops;
900 /* tmp_inode->i_fop = *//* do not need to set to anything */
901 } else {
902 cFYI(1, ("Special inode"));
903 init_special_inode(tmp_inode, tmp_inode->i_mode,
904 tmp_inode->i_rdev);
905 }
906 }
907
908 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
909 {
910 int rc = 0;
911 int xid;
912 struct cifs_sb_info *cifs_sb;
913 struct cifsTconInfo *pTcon;
914 char *full_path = NULL;
915 struct inode *newinode = NULL;
916
917 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
918
919 xid = GetXid();
920
921 cifs_sb = CIFS_SB(inode->i_sb);
922 pTcon = cifs_sb->tcon;
923
924 full_path = build_path_from_dentry(direntry);
925 if (full_path == NULL) {
926 FreeXid(xid);
927 return -ENOMEM;
928 }
929
930 if ((pTcon->ses->capabilities & CAP_UNIX) &&
931 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
932 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
933 u32 oplock = 0;
934 FILE_UNIX_BASIC_INFO * pInfo =
935 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
936 if (pInfo == NULL) {
937 rc = -ENOMEM;
938 goto mkdir_out;
939 }
940
941 mode &= ~current->fs->umask;
942 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
943 mode, NULL /* netfid */, pInfo, &oplock,
944 full_path, cifs_sb->local_nls,
945 cifs_sb->mnt_cifs_flags &
946 CIFS_MOUNT_MAP_SPECIAL_CHR);
947 if (rc == -EOPNOTSUPP) {
948 kfree(pInfo);
949 goto mkdir_retry_old;
950 } else if (rc) {
951 cFYI(1, ("posix mkdir returned 0x%x", rc));
952 d_drop(direntry);
953 } else {
954 int obj_type;
955 if (pInfo->Type == cpu_to_le32(-1)) {
956 /* no return info, go query for it */
957 kfree(pInfo);
958 goto mkdir_get_info;
959 }
960 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
961 to set uid/gid */
962 inc_nlink(inode);
963 if (pTcon->nocase)
964 direntry->d_op = &cifs_ci_dentry_ops;
965 else
966 direntry->d_op = &cifs_dentry_ops;
967
968 newinode = new_inode(inode->i_sb);
969 if (newinode == NULL) {
970 kfree(pInfo);
971 goto mkdir_get_info;
972 }
973 /* Is an i_ino of zero legal? */
974 /* Are there sanity checks we can use to ensure that
975 the server is really filling in that field? */
976 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
977 newinode->i_ino =
978 (unsigned long)pInfo->UniqueId;
979 } /* note ino incremented to unique num in new_inode */
980 if (inode->i_sb->s_flags & MS_NOATIME)
981 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
982 newinode->i_nlink = 2;
983
984 insert_inode_hash(newinode);
985 d_instantiate(direntry, newinode);
986
987 /* we already checked in POSIXCreate whether
988 frame was long enough */
989 posix_fill_in_inode(direntry->d_inode,
990 pInfo, &obj_type, 1 /* NewInode */);
991 #ifdef CONFIG_CIFS_DEBUG2
992 cFYI(1, ("instantiated dentry %p %s to inode %p",
993 direntry, direntry->d_name.name, newinode));
994
995 if (newinode->i_nlink != 2)
996 cFYI(1, ("unexpected number of links %d",
997 newinode->i_nlink));
998 #endif
999 }
1000 kfree(pInfo);
1001 goto mkdir_out;
1002 }
1003 mkdir_retry_old:
1004 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1005 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1006 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1007 if (rc) {
1008 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1009 d_drop(direntry);
1010 } else {
1011 mkdir_get_info:
1012 inc_nlink(inode);
1013 if (pTcon->unix_ext)
1014 rc = cifs_get_inode_info_unix(&newinode, full_path,
1015 inode->i_sb, xid);
1016 else
1017 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1018 inode->i_sb, xid);
1019
1020 if (pTcon->nocase)
1021 direntry->d_op = &cifs_ci_dentry_ops;
1022 else
1023 direntry->d_op = &cifs_dentry_ops;
1024 d_instantiate(direntry, newinode);
1025 /* setting nlink not necessary except in cases where we
1026 * failed to get it from the server or was set bogus */
1027 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1028 direntry->d_inode->i_nlink = 2;
1029 if (pTcon->unix_ext) {
1030 mode &= ~current->fs->umask;
1031 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1032 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1033 mode,
1034 (__u64)current->fsuid,
1035 (__u64)current->fsgid,
1036 0 /* dev_t */,
1037 cifs_sb->local_nls,
1038 cifs_sb->mnt_cifs_flags &
1039 CIFS_MOUNT_MAP_SPECIAL_CHR);
1040 } else {
1041 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1042 mode, (__u64)-1,
1043 (__u64)-1, 0 /* dev_t */,
1044 cifs_sb->local_nls,
1045 cifs_sb->mnt_cifs_flags &
1046 CIFS_MOUNT_MAP_SPECIAL_CHR);
1047 }
1048 } else {
1049 /* BB to be implemented via Windows secrty descriptors
1050 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1051 -1, -1, local_nls); */
1052 if (direntry->d_inode) {
1053 direntry->d_inode->i_mode = mode;
1054 direntry->d_inode->i_mode |= S_IFDIR;
1055 if (cifs_sb->mnt_cifs_flags &
1056 CIFS_MOUNT_SET_UID) {
1057 direntry->d_inode->i_uid =
1058 current->fsuid;
1059 direntry->d_inode->i_gid =
1060 current->fsgid;
1061 }
1062 }
1063 }
1064 }
1065 mkdir_out:
1066 kfree(full_path);
1067 FreeXid(xid);
1068 return rc;
1069 }
1070
1071 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1072 {
1073 int rc = 0;
1074 int xid;
1075 struct cifs_sb_info *cifs_sb;
1076 struct cifsTconInfo *pTcon;
1077 char *full_path = NULL;
1078 struct cifsInodeInfo *cifsInode;
1079
1080 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1081
1082 xid = GetXid();
1083
1084 cifs_sb = CIFS_SB(inode->i_sb);
1085 pTcon = cifs_sb->tcon;
1086
1087 full_path = build_path_from_dentry(direntry);
1088 if (full_path == NULL) {
1089 FreeXid(xid);
1090 return -ENOMEM;
1091 }
1092
1093 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1094 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1095
1096 if (!rc) {
1097 drop_nlink(inode);
1098 spin_lock(&direntry->d_inode->i_lock);
1099 i_size_write(direntry->d_inode, 0);
1100 clear_nlink(direntry->d_inode);
1101 spin_unlock(&direntry->d_inode->i_lock);
1102 }
1103
1104 cifsInode = CIFS_I(direntry->d_inode);
1105 cifsInode->time = 0; /* force revalidate to go get info when
1106 needed */
1107 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1108 current_fs_time(inode->i_sb);
1109
1110 kfree(full_path);
1111 FreeXid(xid);
1112 return rc;
1113 }
1114
1115 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1116 struct inode *target_inode, struct dentry *target_direntry)
1117 {
1118 char *fromName;
1119 char *toName;
1120 struct cifs_sb_info *cifs_sb_source;
1121 struct cifs_sb_info *cifs_sb_target;
1122 struct cifsTconInfo *pTcon;
1123 int xid;
1124 int rc = 0;
1125
1126 xid = GetXid();
1127
1128 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1129 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1130 pTcon = cifs_sb_source->tcon;
1131
1132 if (pTcon != cifs_sb_target->tcon) {
1133 FreeXid(xid);
1134 return -EXDEV; /* BB actually could be allowed if same server,
1135 but different share.
1136 Might eventually add support for this */
1137 }
1138
1139 /* we already have the rename sem so we do not need to grab it again
1140 here to protect the path integrity */
1141 fromName = build_path_from_dentry(source_direntry);
1142 toName = build_path_from_dentry(target_direntry);
1143 if ((fromName == NULL) || (toName == NULL)) {
1144 rc = -ENOMEM;
1145 goto cifs_rename_exit;
1146 }
1147
1148 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1149 cifs_sb_source->local_nls,
1150 cifs_sb_source->mnt_cifs_flags &
1151 CIFS_MOUNT_MAP_SPECIAL_CHR);
1152 if (rc == -EEXIST) {
1153 /* check if they are the same file because rename of hardlinked
1154 files is a noop */
1155 FILE_UNIX_BASIC_INFO *info_buf_source;
1156 FILE_UNIX_BASIC_INFO *info_buf_target;
1157
1158 info_buf_source =
1159 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1160 if (info_buf_source != NULL) {
1161 info_buf_target = info_buf_source + 1;
1162 if (pTcon->unix_ext)
1163 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1164 info_buf_source,
1165 cifs_sb_source->local_nls,
1166 cifs_sb_source->mnt_cifs_flags &
1167 CIFS_MOUNT_MAP_SPECIAL_CHR);
1168 /* else rc is still EEXIST so will fall through to
1169 unlink the target and retry rename */
1170 if (rc == 0) {
1171 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1172 info_buf_target,
1173 cifs_sb_target->local_nls,
1174 /* remap based on source sb */
1175 cifs_sb_source->mnt_cifs_flags &
1176 CIFS_MOUNT_MAP_SPECIAL_CHR);
1177 }
1178 if ((rc == 0) &&
1179 (info_buf_source->UniqueId ==
1180 info_buf_target->UniqueId)) {
1181 /* do not rename since the files are hardlinked which
1182 is a noop */
1183 } else {
1184 /* we either can not tell the files are hardlinked
1185 (as with Windows servers) or files are not
1186 hardlinked so delete the target manually before
1187 renaming to follow POSIX rather than Windows
1188 semantics */
1189 cifs_unlink(target_inode, target_direntry);
1190 rc = CIFSSMBRename(xid, pTcon, fromName,
1191 toName,
1192 cifs_sb_source->local_nls,
1193 cifs_sb_source->mnt_cifs_flags
1194 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1195 }
1196 kfree(info_buf_source);
1197 } /* if we can not get memory just leave rc as EEXIST */
1198 }
1199
1200 if (rc) {
1201 cFYI(1, ("rename rc %d", rc));
1202 }
1203
1204 if ((rc == -EIO) || (rc == -EEXIST)) {
1205 int oplock = FALSE;
1206 __u16 netfid;
1207
1208 /* BB FIXME Is Generic Read correct for rename? */
1209 /* if renaming directory - we should not say CREATE_NOT_DIR,
1210 need to test renaming open directory, also GENERIC_READ
1211 might not right be right access to request */
1212 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1213 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1214 cifs_sb_source->local_nls,
1215 cifs_sb_source->mnt_cifs_flags &
1216 CIFS_MOUNT_MAP_SPECIAL_CHR);
1217 if (rc == 0) {
1218 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1219 cifs_sb_source->local_nls,
1220 cifs_sb_source->mnt_cifs_flags &
1221 CIFS_MOUNT_MAP_SPECIAL_CHR);
1222 CIFSSMBClose(xid, pTcon, netfid);
1223 }
1224 }
1225
1226 cifs_rename_exit:
1227 kfree(fromName);
1228 kfree(toName);
1229 FreeXid(xid);
1230 return rc;
1231 }
1232
1233 int cifs_revalidate(struct dentry *direntry)
1234 {
1235 int xid;
1236 int rc = 0, wbrc = 0;
1237 char *full_path;
1238 struct cifs_sb_info *cifs_sb;
1239 struct cifsInodeInfo *cifsInode;
1240 loff_t local_size;
1241 struct timespec local_mtime;
1242 int invalidate_inode = FALSE;
1243
1244 if (direntry->d_inode == NULL)
1245 return -ENOENT;
1246
1247 cifsInode = CIFS_I(direntry->d_inode);
1248
1249 if (cifsInode == NULL)
1250 return -ENOENT;
1251
1252 /* no sense revalidating inode info on file that no one can write */
1253 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1254 return rc;
1255
1256 xid = GetXid();
1257
1258 cifs_sb = CIFS_SB(direntry->d_sb);
1259
1260 /* can not safely grab the rename sem here if rename calls revalidate
1261 since that would deadlock */
1262 full_path = build_path_from_dentry(direntry);
1263 if (full_path == NULL) {
1264 FreeXid(xid);
1265 return -ENOMEM;
1266 }
1267 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1268 "jiffies %ld", full_path, direntry->d_inode,
1269 direntry->d_inode->i_count.counter, direntry,
1270 direntry->d_time, jiffies));
1271
1272 if (cifsInode->time == 0) {
1273 /* was set to zero previously to force revalidate */
1274 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1275 lookupCacheEnabled) {
1276 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1277 (direntry->d_inode->i_nlink == 1)) {
1278 kfree(full_path);
1279 FreeXid(xid);
1280 return rc;
1281 } else {
1282 cFYI(1, ("Have to revalidate file due to hardlinks"));
1283 }
1284 }
1285
1286 /* save mtime and size */
1287 local_mtime = direntry->d_inode->i_mtime;
1288 local_size = direntry->d_inode->i_size;
1289
1290 if (cifs_sb->tcon->unix_ext) {
1291 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1292 direntry->d_sb, xid);
1293 if (rc) {
1294 cFYI(1, ("error on getting revalidate info %d", rc));
1295 /* if (rc != -ENOENT)
1296 rc = 0; */ /* BB should we cache info on
1297 certain errors? */
1298 }
1299 } else {
1300 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1301 direntry->d_sb, xid);
1302 if (rc) {
1303 cFYI(1, ("error on getting revalidate info %d", rc));
1304 /* if (rc != -ENOENT)
1305 rc = 0; */ /* BB should we cache info on
1306 certain errors? */
1307 }
1308 }
1309 /* should we remap certain errors, access denied?, to zero */
1310
1311 /* if not oplocked, we invalidate inode pages if mtime or file size
1312 had changed on server */
1313
1314 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1315 (local_size == direntry->d_inode->i_size)) {
1316 cFYI(1, ("cifs_revalidate - inode unchanged"));
1317 } else {
1318 /* file may have changed on server */
1319 if (cifsInode->clientCanCacheRead) {
1320 /* no need to invalidate inode pages since we were the
1321 only ones who could have modified the file and the
1322 server copy is staler than ours */
1323 } else {
1324 invalidate_inode = TRUE;
1325 }
1326 }
1327
1328 /* can not grab this sem since kernel filesys locking documentation
1329 indicates i_mutex may be taken by the kernel on lookup and rename
1330 which could deadlock if we grab the i_mutex here as well */
1331 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1332 /* need to write out dirty pages here */
1333 if (direntry->d_inode->i_mapping) {
1334 /* do we need to lock inode until after invalidate completes
1335 below? */
1336 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1337 if (wbrc)
1338 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1339 }
1340 if (invalidate_inode) {
1341 /* shrink_dcache not necessary now that cifs dentry ops
1342 are exported for negative dentries */
1343 /* if (S_ISDIR(direntry->d_inode->i_mode))
1344 shrink_dcache_parent(direntry); */
1345 if (S_ISREG(direntry->d_inode->i_mode)) {
1346 if (direntry->d_inode->i_mapping)
1347 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1348 if (wbrc)
1349 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1350 /* may eventually have to do this for open files too */
1351 if (list_empty(&(cifsInode->openFileList))) {
1352 /* changed on server - flush read ahead pages */
1353 cFYI(1, ("Invalidating read ahead data on "
1354 "closed file"));
1355 invalidate_remote_inode(direntry->d_inode);
1356 }
1357 }
1358 }
1359 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1360
1361 kfree(full_path);
1362 FreeXid(xid);
1363 return rc;
1364 }
1365
1366 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1367 struct kstat *stat)
1368 {
1369 int err = cifs_revalidate(dentry);
1370 if (!err) {
1371 generic_fillattr(dentry->d_inode, stat);
1372 stat->blksize = CIFS_MAX_MSGSIZE;
1373 }
1374 return err;
1375 }
1376
1377 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1378 {
1379 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1380 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1381 struct page *page;
1382 int rc = 0;
1383
1384 page = grab_cache_page(mapping, index);
1385 if (!page)
1386 return -ENOMEM;
1387
1388 zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1389 unlock_page(page);
1390 page_cache_release(page);
1391 return rc;
1392 }
1393
1394 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1395 {
1396 struct address_space *mapping = inode->i_mapping;
1397 unsigned long limit;
1398
1399 spin_lock(&inode->i_lock);
1400 if (inode->i_size < offset)
1401 goto do_expand;
1402 /*
1403 * truncation of in-use swapfiles is disallowed - it would cause
1404 * subsequent swapout to scribble on the now-freed blocks.
1405 */
1406 if (IS_SWAPFILE(inode)) {
1407 spin_unlock(&inode->i_lock);
1408 goto out_busy;
1409 }
1410 i_size_write(inode, offset);
1411 spin_unlock(&inode->i_lock);
1412 /*
1413 * unmap_mapping_range is called twice, first simply for efficiency
1414 * so that truncate_inode_pages does fewer single-page unmaps. However
1415 * after this first call, and before truncate_inode_pages finishes,
1416 * it is possible for private pages to be COWed, which remain after
1417 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1418 * call must be made for correctness.
1419 */
1420 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1421 truncate_inode_pages(mapping, offset);
1422 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1423 goto out_truncate;
1424
1425 do_expand:
1426 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1427 if (limit != RLIM_INFINITY && offset > limit) {
1428 spin_unlock(&inode->i_lock);
1429 goto out_sig;
1430 }
1431 if (offset > inode->i_sb->s_maxbytes) {
1432 spin_unlock(&inode->i_lock);
1433 goto out_big;
1434 }
1435 i_size_write(inode, offset);
1436 spin_unlock(&inode->i_lock);
1437 out_truncate:
1438 if (inode->i_op && inode->i_op->truncate)
1439 inode->i_op->truncate(inode);
1440 return 0;
1441 out_sig:
1442 send_sig(SIGXFSZ, current, 0);
1443 out_big:
1444 return -EFBIG;
1445 out_busy:
1446 return -ETXTBSY;
1447 }
1448
1449 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1450 {
1451 int xid;
1452 struct cifs_sb_info *cifs_sb;
1453 struct cifsTconInfo *pTcon;
1454 char *full_path = NULL;
1455 int rc = -EACCES;
1456 struct cifsFileInfo *open_file = NULL;
1457 FILE_BASIC_INFO time_buf;
1458 int set_time = FALSE;
1459 int set_dosattr = FALSE;
1460 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1461 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1462 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1463 struct cifsInodeInfo *cifsInode;
1464
1465 xid = GetXid();
1466
1467 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1468 direntry->d_name.name, attrs->ia_valid));
1469
1470 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1471 pTcon = cifs_sb->tcon;
1472
1473 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1474 /* check if we have permission to change attrs */
1475 rc = inode_change_ok(direntry->d_inode, attrs);
1476 if (rc < 0) {
1477 FreeXid(xid);
1478 return rc;
1479 } else
1480 rc = 0;
1481 }
1482
1483 full_path = build_path_from_dentry(direntry);
1484 if (full_path == NULL) {
1485 FreeXid(xid);
1486 return -ENOMEM;
1487 }
1488 cifsInode = CIFS_I(direntry->d_inode);
1489
1490 /* BB check if we need to refresh inode from server now ? BB */
1491
1492 if (attrs->ia_valid & ATTR_SIZE) {
1493 /*
1494 Flush data before changing file size on server. If the
1495 flush returns error, store it to report later and continue.
1496 BB: This should be smarter. Why bother flushing pages that
1497 will be truncated anyway? Also, should we error out here if
1498 the flush returns error?
1499 */
1500 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1501 if (rc != 0) {
1502 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1503 rc = 0;
1504 }
1505
1506 /* To avoid spurious oplock breaks from server, in the case of
1507 inodes that we already have open, avoid doing path based
1508 setting of file size if we can do it by handle.
1509 This keeps our caching token (oplock) and avoids timeouts
1510 when the local oplock break takes longer to flush
1511 writebehind data than the SMB timeout for the SetPathInfo
1512 request would allow */
1513
1514 open_file = find_writable_file(cifsInode);
1515 if (open_file) {
1516 __u16 nfid = open_file->netfid;
1517 __u32 npid = open_file->pid;
1518 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1519 nfid, npid, FALSE);
1520 atomic_dec(&open_file->wrtPending);
1521 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1522 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1523 unsigned int bytes_written;
1524 rc = CIFSSMBWrite(xid, pTcon,
1525 nfid, 0, attrs->ia_size,
1526 &bytes_written, NULL, NULL,
1527 1 /* 45 seconds */);
1528 cFYI(1, ("Wrt seteof rc %d", rc));
1529 }
1530 } else
1531 rc = -EINVAL;
1532
1533 if (rc != 0) {
1534 /* Set file size by pathname rather than by handle
1535 either because no valid, writeable file handle for
1536 it was found or because there was an error setting
1537 it by handle */
1538 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1539 attrs->ia_size, FALSE,
1540 cifs_sb->local_nls,
1541 cifs_sb->mnt_cifs_flags &
1542 CIFS_MOUNT_MAP_SPECIAL_CHR);
1543 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1544 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1545 __u16 netfid;
1546 int oplock = FALSE;
1547
1548 rc = SMBLegacyOpen(xid, pTcon, full_path,
1549 FILE_OPEN,
1550 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1551 CREATE_NOT_DIR, &netfid, &oplock,
1552 NULL, cifs_sb->local_nls,
1553 cifs_sb->mnt_cifs_flags &
1554 CIFS_MOUNT_MAP_SPECIAL_CHR);
1555 if (rc == 0) {
1556 unsigned int bytes_written;
1557 rc = CIFSSMBWrite(xid, pTcon,
1558 netfid, 0,
1559 attrs->ia_size,
1560 &bytes_written, NULL,
1561 NULL, 1 /* 45 sec */);
1562 cFYI(1, ("wrt seteof rc %d", rc));
1563 CIFSSMBClose(xid, pTcon, netfid);
1564 }
1565
1566 }
1567 }
1568
1569 /* Server is ok setting allocation size implicitly - no need
1570 to call:
1571 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1572 cifs_sb->local_nls);
1573 */
1574
1575 if (rc == 0) {
1576 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1577 cifs_truncate_page(direntry->d_inode->i_mapping,
1578 direntry->d_inode->i_size);
1579 } else
1580 goto cifs_setattr_exit;
1581 }
1582 if (attrs->ia_valid & ATTR_UID) {
1583 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1584 uid = attrs->ia_uid;
1585 }
1586 if (attrs->ia_valid & ATTR_GID) {
1587 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1588 gid = attrs->ia_gid;
1589 }
1590
1591 time_buf.Attributes = 0;
1592
1593 /* skip mode change if it's just for clearing setuid/setgid */
1594 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1595 attrs->ia_valid &= ~ATTR_MODE;
1596
1597 if (attrs->ia_valid & ATTR_MODE) {
1598 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1599 mode = attrs->ia_mode;
1600 }
1601
1602 if ((pTcon->unix_ext)
1603 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1604 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1605 0 /* dev_t */, cifs_sb->local_nls,
1606 cifs_sb->mnt_cifs_flags &
1607 CIFS_MOUNT_MAP_SPECIAL_CHR);
1608 else if (attrs->ia_valid & ATTR_MODE) {
1609 rc = 0;
1610 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1611 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1612 set_dosattr = TRUE;
1613 time_buf.Attributes =
1614 cpu_to_le32(cifsInode->cifsAttrs |
1615 ATTR_READONLY);
1616 }
1617 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1618 /* If file is readonly on server, we would
1619 not be able to write to it - so if any write
1620 bit is enabled for user or group or other we
1621 need to at least try to remove r/o dos attr */
1622 set_dosattr = TRUE;
1623 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1624 (~ATTR_READONLY));
1625 /* Windows ignores set to zero */
1626 if (time_buf.Attributes == 0)
1627 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1628 }
1629 /* BB to be implemented -
1630 via Windows security descriptors or streams */
1631 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1632 cifs_sb->local_nls); */
1633 }
1634
1635 if (attrs->ia_valid & ATTR_ATIME) {
1636 set_time = TRUE;
1637 time_buf.LastAccessTime =
1638 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1639 } else
1640 time_buf.LastAccessTime = 0;
1641
1642 if (attrs->ia_valid & ATTR_MTIME) {
1643 set_time = TRUE;
1644 time_buf.LastWriteTime =
1645 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1646 } else
1647 time_buf.LastWriteTime = 0;
1648 /* Do not set ctime explicitly unless other time
1649 stamps are changed explicitly (i.e. by utime()
1650 since we would then have a mix of client and
1651 server times */
1652
1653 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1654 set_time = TRUE;
1655 /* Although Samba throws this field away
1656 it may be useful to Windows - but we do
1657 not want to set ctime unless some other
1658 timestamp is changing */
1659 cFYI(1, ("CIFS - CTIME changed"));
1660 time_buf.ChangeTime =
1661 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1662 } else
1663 time_buf.ChangeTime = 0;
1664
1665 if (set_time || set_dosattr) {
1666 time_buf.CreationTime = 0; /* do not change */
1667 /* In the future we should experiment - try setting timestamps
1668 via Handle (SetFileInfo) instead of by path */
1669 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1670 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1671 cifs_sb->local_nls,
1672 cifs_sb->mnt_cifs_flags &
1673 CIFS_MOUNT_MAP_SPECIAL_CHR);
1674 else
1675 rc = -EOPNOTSUPP;
1676
1677 if (rc == -EOPNOTSUPP) {
1678 int oplock = FALSE;
1679 __u16 netfid;
1680
1681 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1682 "times not supported by this server"));
1683 /* BB we could scan to see if we already have it open
1684 and pass in pid of opener to function */
1685 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1686 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1687 CREATE_NOT_DIR, &netfid, &oplock,
1688 NULL, cifs_sb->local_nls,
1689 cifs_sb->mnt_cifs_flags &
1690 CIFS_MOUNT_MAP_SPECIAL_CHR);
1691 if (rc == 0) {
1692 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1693 netfid);
1694 CIFSSMBClose(xid, pTcon, netfid);
1695 } else {
1696 /* BB For even older servers we could convert time_buf
1697 into old DOS style which uses two second
1698 granularity */
1699
1700 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1701 &time_buf, cifs_sb->local_nls); */
1702 }
1703 }
1704 /* Even if error on time set, no sense failing the call if
1705 the server would set the time to a reasonable value anyway,
1706 and this check ensures that we are not being called from
1707 sys_utimes in which case we ought to fail the call back to
1708 the user when the server rejects the call */
1709 if ((rc) && (attrs->ia_valid &
1710 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1711 rc = 0;
1712 }
1713
1714 /* do not need local check to inode_check_ok since the server does
1715 that */
1716 if (!rc)
1717 rc = inode_setattr(direntry->d_inode, attrs);
1718 cifs_setattr_exit:
1719 kfree(full_path);
1720 FreeXid(xid);
1721 return rc;
1722 }
1723
1724 #if 0
1725 void cifs_delete_inode(struct inode *inode)
1726 {
1727 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1728 /* may have to add back in if and when safe distributed caching of
1729 directories added e.g. via FindNotify */
1730 }
1731 #endif
WRT350N Kernel Patches