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[CIFS] clean up some hard to read ifdefs
[deliverable/linux.git] / fs / cifs / inode.c
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 cFYI(DBG2, ("object type: %d", type));
841 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
842 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
843 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
844
845 spin_lock(&tmp_inode->i_lock);
846 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
847 /* can not safely change the file size here if the
848 client is writing to it due to potential races */
849 i_size_write(tmp_inode, end_of_file);
850
851 /* 512 bytes (2**9) is the fake blocksize that must be used */
852 /* for this calculation, not the real blocksize */
853 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
854 }
855 spin_unlock(&tmp_inode->i_lock);
856
857 if (S_ISREG(tmp_inode->i_mode)) {
858 cFYI(1, ("File inode"));
859 tmp_inode->i_op = &cifs_file_inode_ops;
860
861 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
862 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
863 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
864 else
865 tmp_inode->i_fop = &cifs_file_direct_ops;
866
867 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
868 tmp_inode->i_fop = &cifs_file_nobrl_ops;
869 else
870 tmp_inode->i_fop = &cifs_file_ops;
871
872 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
873 (cifs_sb->tcon->ses->server->maxBuf <
874 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
875 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
876 else
877 tmp_inode->i_data.a_ops = &cifs_addr_ops;
878
879 if (isNewInode)
880 return; /* No sense invalidating pages for new inode
881 since we we have not started caching
882 readahead file data yet */
883
884 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
885 (local_size == tmp_inode->i_size)) {
886 cFYI(1, ("inode exists but unchanged"));
887 } else {
888 /* file may have changed on server */
889 cFYI(1, ("invalidate inode, readdir detected change"));
890 invalidate_remote_inode(tmp_inode);
891 }
892 } else if (S_ISDIR(tmp_inode->i_mode)) {
893 cFYI(1, ("Directory inode"));
894 tmp_inode->i_op = &cifs_dir_inode_ops;
895 tmp_inode->i_fop = &cifs_dir_ops;
896 } else if (S_ISLNK(tmp_inode->i_mode)) {
897 cFYI(1, ("Symbolic Link inode"));
898 tmp_inode->i_op = &cifs_symlink_inode_ops;
899 /* tmp_inode->i_fop = *//* do not need to set to anything */
900 } else {
901 cFYI(1, ("Special inode"));
902 init_special_inode(tmp_inode, tmp_inode->i_mode,
903 tmp_inode->i_rdev);
904 }
905 }
906
907 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
908 {
909 int rc = 0;
910 int xid;
911 struct cifs_sb_info *cifs_sb;
912 struct cifsTconInfo *pTcon;
913 char *full_path = NULL;
914 struct inode *newinode = NULL;
915
916 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
917
918 xid = GetXid();
919
920 cifs_sb = CIFS_SB(inode->i_sb);
921 pTcon = cifs_sb->tcon;
922
923 full_path = build_path_from_dentry(direntry);
924 if (full_path == NULL) {
925 FreeXid(xid);
926 return -ENOMEM;
927 }
928
929 if ((pTcon->ses->capabilities & CAP_UNIX) &&
930 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
931 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
932 u32 oplock = 0;
933 FILE_UNIX_BASIC_INFO *pInfo =
934 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
935 if (pInfo == NULL) {
936 rc = -ENOMEM;
937 goto mkdir_out;
938 }
939
940 mode &= ~current->fs->umask;
941 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
942 mode, NULL /* netfid */, pInfo, &oplock,
943 full_path, cifs_sb->local_nls,
944 cifs_sb->mnt_cifs_flags &
945 CIFS_MOUNT_MAP_SPECIAL_CHR);
946 if (rc == -EOPNOTSUPP) {
947 kfree(pInfo);
948 goto mkdir_retry_old;
949 } else if (rc) {
950 cFYI(1, ("posix mkdir returned 0x%x", rc));
951 d_drop(direntry);
952 } else {
953 int obj_type;
954 if (pInfo->Type == cpu_to_le32(-1)) {
955 /* no return info, go query for it */
956 kfree(pInfo);
957 goto mkdir_get_info;
958 }
959 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
960 to set uid/gid */
961 inc_nlink(inode);
962 if (pTcon->nocase)
963 direntry->d_op = &cifs_ci_dentry_ops;
964 else
965 direntry->d_op = &cifs_dentry_ops;
966
967 newinode = new_inode(inode->i_sb);
968 if (newinode == NULL) {
969 kfree(pInfo);
970 goto mkdir_get_info;
971 }
972 /* Is an i_ino of zero legal? */
973 /* Are there sanity checks we can use to ensure that
974 the server is really filling in that field? */
975 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
976 newinode->i_ino =
977 (unsigned long)pInfo->UniqueId;
978 } /* note ino incremented to unique num in new_inode */
979 if (inode->i_sb->s_flags & MS_NOATIME)
980 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
981 newinode->i_nlink = 2;
982
983 insert_inode_hash(newinode);
984 d_instantiate(direntry, newinode);
985
986 /* we already checked in POSIXCreate whether
987 frame was long enough */
988 posix_fill_in_inode(direntry->d_inode,
989 pInfo, &obj_type, 1 /* NewInode */);
990 #ifdef CONFIG_CIFS_DEBUG2
991 cFYI(1, ("instantiated dentry %p %s to inode %p",
992 direntry, direntry->d_name.name, newinode));
993
994 if (newinode->i_nlink != 2)
995 cFYI(1, ("unexpected number of links %d",
996 newinode->i_nlink));
997 #endif
998 }
999 kfree(pInfo);
1000 goto mkdir_out;
1001 }
1002 mkdir_retry_old:
1003 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1004 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1005 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1006 if (rc) {
1007 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1008 d_drop(direntry);
1009 } else {
1010 mkdir_get_info:
1011 inc_nlink(inode);
1012 if (pTcon->unix_ext)
1013 rc = cifs_get_inode_info_unix(&newinode, full_path,
1014 inode->i_sb, xid);
1015 else
1016 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1017 inode->i_sb, xid);
1018
1019 if (pTcon->nocase)
1020 direntry->d_op = &cifs_ci_dentry_ops;
1021 else
1022 direntry->d_op = &cifs_dentry_ops;
1023 d_instantiate(direntry, newinode);
1024 /* setting nlink not necessary except in cases where we
1025 * failed to get it from the server or was set bogus */
1026 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1027 direntry->d_inode->i_nlink = 2;
1028 if (pTcon->unix_ext) {
1029 mode &= ~current->fs->umask;
1030 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1031 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1032 mode,
1033 (__u64)current->fsuid,
1034 (__u64)current->fsgid,
1035 0 /* dev_t */,
1036 cifs_sb->local_nls,
1037 cifs_sb->mnt_cifs_flags &
1038 CIFS_MOUNT_MAP_SPECIAL_CHR);
1039 } else {
1040 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1041 mode, (__u64)-1,
1042 (__u64)-1, 0 /* dev_t */,
1043 cifs_sb->local_nls,
1044 cifs_sb->mnt_cifs_flags &
1045 CIFS_MOUNT_MAP_SPECIAL_CHR);
1046 }
1047 } else {
1048 /* BB to be implemented via Windows secrty descriptors
1049 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1050 -1, -1, local_nls); */
1051 if (direntry->d_inode) {
1052 direntry->d_inode->i_mode = mode;
1053 direntry->d_inode->i_mode |= S_IFDIR;
1054 if (cifs_sb->mnt_cifs_flags &
1055 CIFS_MOUNT_SET_UID) {
1056 direntry->d_inode->i_uid =
1057 current->fsuid;
1058 direntry->d_inode->i_gid =
1059 current->fsgid;
1060 }
1061 }
1062 }
1063 }
1064 mkdir_out:
1065 kfree(full_path);
1066 FreeXid(xid);
1067 return rc;
1068 }
1069
1070 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1071 {
1072 int rc = 0;
1073 int xid;
1074 struct cifs_sb_info *cifs_sb;
1075 struct cifsTconInfo *pTcon;
1076 char *full_path = NULL;
1077 struct cifsInodeInfo *cifsInode;
1078
1079 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1080
1081 xid = GetXid();
1082
1083 cifs_sb = CIFS_SB(inode->i_sb);
1084 pTcon = cifs_sb->tcon;
1085
1086 full_path = build_path_from_dentry(direntry);
1087 if (full_path == NULL) {
1088 FreeXid(xid);
1089 return -ENOMEM;
1090 }
1091
1092 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1093 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1094
1095 if (!rc) {
1096 drop_nlink(inode);
1097 spin_lock(&direntry->d_inode->i_lock);
1098 i_size_write(direntry->d_inode, 0);
1099 clear_nlink(direntry->d_inode);
1100 spin_unlock(&direntry->d_inode->i_lock);
1101 }
1102
1103 cifsInode = CIFS_I(direntry->d_inode);
1104 cifsInode->time = 0; /* force revalidate to go get info when
1105 needed */
1106 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1107 current_fs_time(inode->i_sb);
1108
1109 kfree(full_path);
1110 FreeXid(xid);
1111 return rc;
1112 }
1113
1114 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1115 struct inode *target_inode, struct dentry *target_direntry)
1116 {
1117 char *fromName;
1118 char *toName;
1119 struct cifs_sb_info *cifs_sb_source;
1120 struct cifs_sb_info *cifs_sb_target;
1121 struct cifsTconInfo *pTcon;
1122 int xid;
1123 int rc = 0;
1124
1125 xid = GetXid();
1126
1127 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1128 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1129 pTcon = cifs_sb_source->tcon;
1130
1131 if (pTcon != cifs_sb_target->tcon) {
1132 FreeXid(xid);
1133 return -EXDEV; /* BB actually could be allowed if same server,
1134 but different share.
1135 Might eventually add support for this */
1136 }
1137
1138 /* we already have the rename sem so we do not need to grab it again
1139 here to protect the path integrity */
1140 fromName = build_path_from_dentry(source_direntry);
1141 toName = build_path_from_dentry(target_direntry);
1142 if ((fromName == NULL) || (toName == NULL)) {
1143 rc = -ENOMEM;
1144 goto cifs_rename_exit;
1145 }
1146
1147 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1148 cifs_sb_source->local_nls,
1149 cifs_sb_source->mnt_cifs_flags &
1150 CIFS_MOUNT_MAP_SPECIAL_CHR);
1151 if (rc == -EEXIST) {
1152 /* check if they are the same file because rename of hardlinked
1153 files is a noop */
1154 FILE_UNIX_BASIC_INFO *info_buf_source;
1155 FILE_UNIX_BASIC_INFO *info_buf_target;
1156
1157 info_buf_source =
1158 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1159 if (info_buf_source != NULL) {
1160 info_buf_target = info_buf_source + 1;
1161 if (pTcon->unix_ext)
1162 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1163 info_buf_source,
1164 cifs_sb_source->local_nls,
1165 cifs_sb_source->mnt_cifs_flags &
1166 CIFS_MOUNT_MAP_SPECIAL_CHR);
1167 /* else rc is still EEXIST so will fall through to
1168 unlink the target and retry rename */
1169 if (rc == 0) {
1170 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1171 info_buf_target,
1172 cifs_sb_target->local_nls,
1173 /* remap based on source sb */
1174 cifs_sb_source->mnt_cifs_flags &
1175 CIFS_MOUNT_MAP_SPECIAL_CHR);
1176 }
1177 if ((rc == 0) &&
1178 (info_buf_source->UniqueId ==
1179 info_buf_target->UniqueId)) {
1180 /* do not rename since the files are hardlinked which
1181 is a noop */
1182 } else {
1183 /* we either can not tell the files are hardlinked
1184 (as with Windows servers) or files are not
1185 hardlinked so delete the target manually before
1186 renaming to follow POSIX rather than Windows
1187 semantics */
1188 cifs_unlink(target_inode, target_direntry);
1189 rc = CIFSSMBRename(xid, pTcon, fromName,
1190 toName,
1191 cifs_sb_source->local_nls,
1192 cifs_sb_source->mnt_cifs_flags
1193 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1194 }
1195 kfree(info_buf_source);
1196 } /* if we can not get memory just leave rc as EEXIST */
1197 }
1198
1199 if (rc)
1200 cFYI(1, ("rename rc %d", rc));
1201
1202 if ((rc == -EIO) || (rc == -EEXIST)) {
1203 int oplock = FALSE;
1204 __u16 netfid;
1205
1206 /* BB FIXME Is Generic Read correct for rename? */
1207 /* if renaming directory - we should not say CREATE_NOT_DIR,
1208 need to test renaming open directory, also GENERIC_READ
1209 might not right be right access to request */
1210 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1211 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1212 cifs_sb_source->local_nls,
1213 cifs_sb_source->mnt_cifs_flags &
1214 CIFS_MOUNT_MAP_SPECIAL_CHR);
1215 if (rc == 0) {
1216 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1217 cifs_sb_source->local_nls,
1218 cifs_sb_source->mnt_cifs_flags &
1219 CIFS_MOUNT_MAP_SPECIAL_CHR);
1220 CIFSSMBClose(xid, pTcon, netfid);
1221 }
1222 }
1223
1224 cifs_rename_exit:
1225 kfree(fromName);
1226 kfree(toName);
1227 FreeXid(xid);
1228 return rc;
1229 }
1230
1231 int cifs_revalidate(struct dentry *direntry)
1232 {
1233 int xid;
1234 int rc = 0, wbrc = 0;
1235 char *full_path;
1236 struct cifs_sb_info *cifs_sb;
1237 struct cifsInodeInfo *cifsInode;
1238 loff_t local_size;
1239 struct timespec local_mtime;
1240 int invalidate_inode = FALSE;
1241
1242 if (direntry->d_inode == NULL)
1243 return -ENOENT;
1244
1245 cifsInode = CIFS_I(direntry->d_inode);
1246
1247 if (cifsInode == NULL)
1248 return -ENOENT;
1249
1250 /* no sense revalidating inode info on file that no one can write */
1251 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1252 return rc;
1253
1254 xid = GetXid();
1255
1256 cifs_sb = CIFS_SB(direntry->d_sb);
1257
1258 /* can not safely grab the rename sem here if rename calls revalidate
1259 since that would deadlock */
1260 full_path = build_path_from_dentry(direntry);
1261 if (full_path == NULL) {
1262 FreeXid(xid);
1263 return -ENOMEM;
1264 }
1265 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1266 "jiffies %ld", full_path, direntry->d_inode,
1267 direntry->d_inode->i_count.counter, direntry,
1268 direntry->d_time, jiffies));
1269
1270 if (cifsInode->time == 0) {
1271 /* was set to zero previously to force revalidate */
1272 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1273 lookupCacheEnabled) {
1274 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1275 (direntry->d_inode->i_nlink == 1)) {
1276 kfree(full_path);
1277 FreeXid(xid);
1278 return rc;
1279 } else {
1280 cFYI(1, ("Have to revalidate file due to hardlinks"));
1281 }
1282 }
1283
1284 /* save mtime and size */
1285 local_mtime = direntry->d_inode->i_mtime;
1286 local_size = direntry->d_inode->i_size;
1287
1288 if (cifs_sb->tcon->unix_ext) {
1289 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1290 direntry->d_sb, xid);
1291 if (rc) {
1292 cFYI(1, ("error on getting revalidate info %d", rc));
1293 /* if (rc != -ENOENT)
1294 rc = 0; */ /* BB should we cache info on
1295 certain errors? */
1296 }
1297 } else {
1298 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1299 direntry->d_sb, xid);
1300 if (rc) {
1301 cFYI(1, ("error on getting revalidate info %d", rc));
1302 /* if (rc != -ENOENT)
1303 rc = 0; */ /* BB should we cache info on
1304 certain errors? */
1305 }
1306 }
1307 /* should we remap certain errors, access denied?, to zero */
1308
1309 /* if not oplocked, we invalidate inode pages if mtime or file size
1310 had changed on server */
1311
1312 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1313 (local_size == direntry->d_inode->i_size)) {
1314 cFYI(1, ("cifs_revalidate - inode unchanged"));
1315 } else {
1316 /* file may have changed on server */
1317 if (cifsInode->clientCanCacheRead) {
1318 /* no need to invalidate inode pages since we were the
1319 only ones who could have modified the file and the
1320 server copy is staler than ours */
1321 } else {
1322 invalidate_inode = TRUE;
1323 }
1324 }
1325
1326 /* can not grab this sem since kernel filesys locking documentation
1327 indicates i_mutex may be taken by the kernel on lookup and rename
1328 which could deadlock if we grab the i_mutex here as well */
1329 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1330 /* need to write out dirty pages here */
1331 if (direntry->d_inode->i_mapping) {
1332 /* do we need to lock inode until after invalidate completes
1333 below? */
1334 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1335 if (wbrc)
1336 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1337 }
1338 if (invalidate_inode) {
1339 /* shrink_dcache not necessary now that cifs dentry ops
1340 are exported for negative dentries */
1341 /* if (S_ISDIR(direntry->d_inode->i_mode))
1342 shrink_dcache_parent(direntry); */
1343 if (S_ISREG(direntry->d_inode->i_mode)) {
1344 if (direntry->d_inode->i_mapping)
1345 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1346 if (wbrc)
1347 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1348 /* may eventually have to do this for open files too */
1349 if (list_empty(&(cifsInode->openFileList))) {
1350 /* changed on server - flush read ahead pages */
1351 cFYI(1, ("Invalidating read ahead data on "
1352 "closed file"));
1353 invalidate_remote_inode(direntry->d_inode);
1354 }
1355 }
1356 }
1357 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1358
1359 kfree(full_path);
1360 FreeXid(xid);
1361 return rc;
1362 }
1363
1364 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1365 struct kstat *stat)
1366 {
1367 int err = cifs_revalidate(dentry);
1368 if (!err) {
1369 generic_fillattr(dentry->d_inode, stat);
1370 stat->blksize = CIFS_MAX_MSGSIZE;
1371 }
1372 return err;
1373 }
1374
1375 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1376 {
1377 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1378 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1379 struct page *page;
1380 int rc = 0;
1381
1382 page = grab_cache_page(mapping, index);
1383 if (!page)
1384 return -ENOMEM;
1385
1386 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1387 unlock_page(page);
1388 page_cache_release(page);
1389 return rc;
1390 }
1391
1392 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1393 {
1394 struct address_space *mapping = inode->i_mapping;
1395 unsigned long limit;
1396
1397 spin_lock(&inode->i_lock);
1398 if (inode->i_size < offset)
1399 goto do_expand;
1400 /*
1401 * truncation of in-use swapfiles is disallowed - it would cause
1402 * subsequent swapout to scribble on the now-freed blocks.
1403 */
1404 if (IS_SWAPFILE(inode)) {
1405 spin_unlock(&inode->i_lock);
1406 goto out_busy;
1407 }
1408 i_size_write(inode, offset);
1409 spin_unlock(&inode->i_lock);
1410 /*
1411 * unmap_mapping_range is called twice, first simply for efficiency
1412 * so that truncate_inode_pages does fewer single-page unmaps. However
1413 * after this first call, and before truncate_inode_pages finishes,
1414 * it is possible for private pages to be COWed, which remain after
1415 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1416 * call must be made for correctness.
1417 */
1418 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1419 truncate_inode_pages(mapping, offset);
1420 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1421 goto out_truncate;
1422
1423 do_expand:
1424 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1425 if (limit != RLIM_INFINITY && offset > limit) {
1426 spin_unlock(&inode->i_lock);
1427 goto out_sig;
1428 }
1429 if (offset > inode->i_sb->s_maxbytes) {
1430 spin_unlock(&inode->i_lock);
1431 goto out_big;
1432 }
1433 i_size_write(inode, offset);
1434 spin_unlock(&inode->i_lock);
1435 out_truncate:
1436 if (inode->i_op && inode->i_op->truncate)
1437 inode->i_op->truncate(inode);
1438 return 0;
1439 out_sig:
1440 send_sig(SIGXFSZ, current, 0);
1441 out_big:
1442 return -EFBIG;
1443 out_busy:
1444 return -ETXTBSY;
1445 }
1446
1447 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1448 {
1449 int xid;
1450 struct cifs_sb_info *cifs_sb;
1451 struct cifsTconInfo *pTcon;
1452 char *full_path = NULL;
1453 int rc = -EACCES;
1454 struct cifsFileInfo *open_file = NULL;
1455 FILE_BASIC_INFO time_buf;
1456 int set_time = FALSE;
1457 int set_dosattr = FALSE;
1458 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1459 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1460 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1461 struct cifsInodeInfo *cifsInode;
1462
1463 xid = GetXid();
1464
1465 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1466 direntry->d_name.name, attrs->ia_valid));
1467
1468 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1469 pTcon = cifs_sb->tcon;
1470
1471 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1472 /* check if we have permission to change attrs */
1473 rc = inode_change_ok(direntry->d_inode, attrs);
1474 if (rc < 0) {
1475 FreeXid(xid);
1476 return rc;
1477 } else
1478 rc = 0;
1479 }
1480
1481 full_path = build_path_from_dentry(direntry);
1482 if (full_path == NULL) {
1483 FreeXid(xid);
1484 return -ENOMEM;
1485 }
1486 cifsInode = CIFS_I(direntry->d_inode);
1487
1488 /* BB check if we need to refresh inode from server now ? BB */
1489
1490 if (attrs->ia_valid & ATTR_SIZE) {
1491 /*
1492 Flush data before changing file size on server. If the
1493 flush returns error, store it to report later and continue.
1494 BB: This should be smarter. Why bother flushing pages that
1495 will be truncated anyway? Also, should we error out here if
1496 the flush returns error?
1497 */
1498 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1499 if (rc != 0) {
1500 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1501 rc = 0;
1502 }
1503
1504 /* To avoid spurious oplock breaks from server, in the case of
1505 inodes that we already have open, avoid doing path based
1506 setting of file size if we can do it by handle.
1507 This keeps our caching token (oplock) and avoids timeouts
1508 when the local oplock break takes longer to flush
1509 writebehind data than the SMB timeout for the SetPathInfo
1510 request would allow */
1511
1512 open_file = find_writable_file(cifsInode);
1513 if (open_file) {
1514 __u16 nfid = open_file->netfid;
1515 __u32 npid = open_file->pid;
1516 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1517 nfid, npid, FALSE);
1518 atomic_dec(&open_file->wrtPending);
1519 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1520 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1521 unsigned int bytes_written;
1522 rc = CIFSSMBWrite(xid, pTcon,
1523 nfid, 0, attrs->ia_size,
1524 &bytes_written, NULL, NULL,
1525 1 /* 45 seconds */);
1526 cFYI(1, ("Wrt seteof rc %d", rc));
1527 }
1528 } else
1529 rc = -EINVAL;
1530
1531 if (rc != 0) {
1532 /* Set file size by pathname rather than by handle
1533 either because no valid, writeable file handle for
1534 it was found or because there was an error setting
1535 it by handle */
1536 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1537 attrs->ia_size, FALSE,
1538 cifs_sb->local_nls,
1539 cifs_sb->mnt_cifs_flags &
1540 CIFS_MOUNT_MAP_SPECIAL_CHR);
1541 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1542 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1543 __u16 netfid;
1544 int oplock = FALSE;
1545
1546 rc = SMBLegacyOpen(xid, pTcon, full_path,
1547 FILE_OPEN,
1548 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1549 CREATE_NOT_DIR, &netfid, &oplock,
1550 NULL, cifs_sb->local_nls,
1551 cifs_sb->mnt_cifs_flags &
1552 CIFS_MOUNT_MAP_SPECIAL_CHR);
1553 if (rc == 0) {
1554 unsigned int bytes_written;
1555 rc = CIFSSMBWrite(xid, pTcon,
1556 netfid, 0,
1557 attrs->ia_size,
1558 &bytes_written, NULL,
1559 NULL, 1 /* 45 sec */);
1560 cFYI(1, ("wrt seteof rc %d", rc));
1561 CIFSSMBClose(xid, pTcon, netfid);
1562 }
1563
1564 }
1565 }
1566
1567 /* Server is ok setting allocation size implicitly - no need
1568 to call:
1569 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1570 cifs_sb->local_nls);
1571 */
1572
1573 if (rc == 0) {
1574 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1575 cifs_truncate_page(direntry->d_inode->i_mapping,
1576 direntry->d_inode->i_size);
1577 } else
1578 goto cifs_setattr_exit;
1579 }
1580 if (attrs->ia_valid & ATTR_UID) {
1581 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1582 uid = attrs->ia_uid;
1583 }
1584 if (attrs->ia_valid & ATTR_GID) {
1585 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1586 gid = attrs->ia_gid;
1587 }
1588
1589 time_buf.Attributes = 0;
1590
1591 /* skip mode change if it's just for clearing setuid/setgid */
1592 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1593 attrs->ia_valid &= ~ATTR_MODE;
1594
1595 if (attrs->ia_valid & ATTR_MODE) {
1596 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1597 mode = attrs->ia_mode;
1598 }
1599
1600 if ((pTcon->unix_ext)
1601 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1602 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1603 0 /* dev_t */, cifs_sb->local_nls,
1604 cifs_sb->mnt_cifs_flags &
1605 CIFS_MOUNT_MAP_SPECIAL_CHR);
1606 else if (attrs->ia_valid & ATTR_MODE) {
1607 rc = 0;
1608 #ifdef CONFIG_CIFS_EXPERIMENTAL
1609 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1610 rc = mode_to_acl(direntry->d_inode, full_path, mode);
1611 else if ((mode & S_IWUGO) == 0) {
1612 #else
1613 if ((mode & S_IWUGO) == 0) {
1614 #endif
1615 /* not writeable */
1616 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1617 set_dosattr = TRUE;
1618 time_buf.Attributes =
1619 cpu_to_le32(cifsInode->cifsAttrs |
1620 ATTR_READONLY);
1621 }
1622 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1623 /* If file is readonly on server, we would
1624 not be able to write to it - so if any write
1625 bit is enabled for user or group or other we
1626 need to at least try to remove r/o dos attr */
1627 set_dosattr = TRUE;
1628 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1629 (~ATTR_READONLY));
1630 /* Windows ignores set to zero */
1631 if (time_buf.Attributes == 0)
1632 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1633 }
1634 #ifdef CONFIG_CIFS_EXPERIMENTAL
1635 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1636 mode_to_acl(direntry->d_inode, full_path, mode);
1637 #endif
1638 }
1639
1640 if (attrs->ia_valid & ATTR_ATIME) {
1641 set_time = TRUE;
1642 time_buf.LastAccessTime =
1643 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1644 } else
1645 time_buf.LastAccessTime = 0;
1646
1647 if (attrs->ia_valid & ATTR_MTIME) {
1648 set_time = TRUE;
1649 time_buf.LastWriteTime =
1650 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1651 } else
1652 time_buf.LastWriteTime = 0;
1653 /* Do not set ctime explicitly unless other time
1654 stamps are changed explicitly (i.e. by utime()
1655 since we would then have a mix of client and
1656 server times */
1657
1658 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1659 set_time = TRUE;
1660 /* Although Samba throws this field away
1661 it may be useful to Windows - but we do
1662 not want to set ctime unless some other
1663 timestamp is changing */
1664 cFYI(1, ("CIFS - CTIME changed"));
1665 time_buf.ChangeTime =
1666 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1667 } else
1668 time_buf.ChangeTime = 0;
1669
1670 if (set_time || set_dosattr) {
1671 time_buf.CreationTime = 0; /* do not change */
1672 /* In the future we should experiment - try setting timestamps
1673 via Handle (SetFileInfo) instead of by path */
1674 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1675 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1676 cifs_sb->local_nls,
1677 cifs_sb->mnt_cifs_flags &
1678 CIFS_MOUNT_MAP_SPECIAL_CHR);
1679 else
1680 rc = -EOPNOTSUPP;
1681
1682 if (rc == -EOPNOTSUPP) {
1683 int oplock = FALSE;
1684 __u16 netfid;
1685
1686 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1687 "times not supported by this server"));
1688 /* BB we could scan to see if we already have it open
1689 and pass in pid of opener to function */
1690 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1691 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1692 CREATE_NOT_DIR, &netfid, &oplock,
1693 NULL, cifs_sb->local_nls,
1694 cifs_sb->mnt_cifs_flags &
1695 CIFS_MOUNT_MAP_SPECIAL_CHR);
1696 if (rc == 0) {
1697 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1698 netfid);
1699 CIFSSMBClose(xid, pTcon, netfid);
1700 } else {
1701 /* BB For even older servers we could convert time_buf
1702 into old DOS style which uses two second
1703 granularity */
1704
1705 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1706 &time_buf, cifs_sb->local_nls); */
1707 }
1708 }
1709 /* Even if error on time set, no sense failing the call if
1710 the server would set the time to a reasonable value anyway,
1711 and this check ensures that we are not being called from
1712 sys_utimes in which case we ought to fail the call back to
1713 the user when the server rejects the call */
1714 if ((rc) && (attrs->ia_valid &
1715 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1716 rc = 0;
1717 }
1718
1719 /* do not need local check to inode_check_ok since the server does
1720 that */
1721 if (!rc)
1722 rc = inode_setattr(direntry->d_inode, attrs);
1723 cifs_setattr_exit:
1724 kfree(full_path);
1725 FreeXid(xid);
1726 return rc;
1727 }
1728
1729 #if 0
1730 void cifs_delete_inode(struct inode *inode)
1731 {
1732 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1733 /* may have to add back in if and when safe distributed caching of
1734 directories added e.g. via FindNotify */
1735 }
1736 #endif
Linux kernel - Deliverables
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