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iget: stop CIFS from using iget() and read_inode()
[linux-2.6/x86.git] / fs / cifs / inode.c
blobb1a4a65eaa08e0b24f1c1daf83700113f38a742b
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 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
590 {
591 int xid;
592 struct cifs_sb_info *cifs_sb;
593 struct inode *inode;
594 long rc;
595
596 inode = iget_locked(sb, ino);
597 if (!inode)
598 return ERR_PTR(-ENOMEM);
599 if (!(inode->i_state & I_NEW))
600 return inode;
601
602 cifs_sb = CIFS_SB(inode->i_sb);
603 xid = GetXid();
604
605 if (cifs_sb->tcon->unix_ext)
606 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
607 else
608 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
609 if (rc && cifs_sb->tcon->ipc) {
610 cFYI(1, ("ipc connection - fake read inode"));
611 inode->i_mode |= S_IFDIR;
612 inode->i_nlink = 2;
613 inode->i_op = &cifs_ipc_inode_ops;
614 inode->i_fop = &simple_dir_operations;
615 inode->i_uid = cifs_sb->mnt_uid;
616 inode->i_gid = cifs_sb->mnt_gid;
617 _FreeXid(xid);
618 iget_failed(inode);
619 return ERR_PTR(rc);
620 }
621
622 unlock_new_inode(inode);
623
624 /* can not call macro FreeXid here since in a void func
625 * TODO: This is no longer true
626 */
627 _FreeXid(xid);
628 return inode;
629 }
630
631 int cifs_unlink(struct inode *inode, struct dentry *direntry)
632 {
633 int rc = 0;
634 int xid;
635 struct cifs_sb_info *cifs_sb;
636 struct cifsTconInfo *pTcon;
637 char *full_path = NULL;
638 struct cifsInodeInfo *cifsInode;
639 FILE_BASIC_INFO *pinfo_buf;
640
641 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
642
643 xid = GetXid();
644
645 if (inode)
646 cifs_sb = CIFS_SB(inode->i_sb);
647 else
648 cifs_sb = CIFS_SB(direntry->d_sb);
649 pTcon = cifs_sb->tcon;
650
651 /* Unlink can be called from rename so we can not grab the sem here
652 since we deadlock otherwise */
653 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
654 full_path = build_path_from_dentry(direntry);
655 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
656 if (full_path == NULL) {
657 FreeXid(xid);
658 return -ENOMEM;
659 }
660
661 if ((pTcon->ses->capabilities & CAP_UNIX) &&
662 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
663 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
664 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
665 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
666 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
667 cFYI(1, ("posix del rc %d", rc));
668 if ((rc == 0) || (rc == -ENOENT))
669 goto psx_del_no_retry;
670 }
671
672 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
673 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
674 psx_del_no_retry:
675 if (!rc) {
676 if (direntry->d_inode)
677 drop_nlink(direntry->d_inode);
678 } else if (rc == -ENOENT) {
679 d_drop(direntry);
680 } else if (rc == -ETXTBSY) {
681 int oplock = FALSE;
682 __u16 netfid;
683
684 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
685 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
686 &netfid, &oplock, NULL, cifs_sb->local_nls,
687 cifs_sb->mnt_cifs_flags &
688 CIFS_MOUNT_MAP_SPECIAL_CHR);
689 if (rc == 0) {
690 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
691 cifs_sb->local_nls,
692 cifs_sb->mnt_cifs_flags &
693 CIFS_MOUNT_MAP_SPECIAL_CHR);
694 CIFSSMBClose(xid, pTcon, netfid);
695 if (direntry->d_inode)
696 drop_nlink(direntry->d_inode);
697 }
698 } else if (rc == -EACCES) {
699 /* try only if r/o attribute set in local lookup data? */
700 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
701 if (pinfo_buf) {
702 /* ATTRS set to normal clears r/o bit */
703 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
704 if (!(pTcon->ses->flags & CIFS_SES_NT4))
705 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
706 pinfo_buf,
707 cifs_sb->local_nls,
708 cifs_sb->mnt_cifs_flags &
709 CIFS_MOUNT_MAP_SPECIAL_CHR);
710 else
711 rc = -EOPNOTSUPP;
712
713 if (rc == -EOPNOTSUPP) {
714 int oplock = FALSE;
715 __u16 netfid;
716 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
717 full_path,
718 (__u16)ATTR_NORMAL,
719 cifs_sb->local_nls);
720 For some strange reason it seems that NT4 eats the
721 old setattr call without actually setting the
722 attributes so on to the third attempted workaround
723 */
724
725 /* BB could scan to see if we already have it open
726 and pass in pid of opener to function */
727 rc = CIFSSMBOpen(xid, pTcon, full_path,
728 FILE_OPEN, SYNCHRONIZE |
729 FILE_WRITE_ATTRIBUTES, 0,
730 &netfid, &oplock, NULL,
731 cifs_sb->local_nls,
732 cifs_sb->mnt_cifs_flags &
733 CIFS_MOUNT_MAP_SPECIAL_CHR);
734 if (rc == 0) {
735 rc = CIFSSMBSetFileTimes(xid, pTcon,
736 pinfo_buf,
737 netfid);
738 CIFSSMBClose(xid, pTcon, netfid);
739 }
740 }
741 kfree(pinfo_buf);
742 }
743 if (rc == 0) {
744 rc = CIFSSMBDelFile(xid, pTcon, full_path,
745 cifs_sb->local_nls,
746 cifs_sb->mnt_cifs_flags &
747 CIFS_MOUNT_MAP_SPECIAL_CHR);
748 if (!rc) {
749 if (direntry->d_inode)
750 drop_nlink(direntry->d_inode);
751 } else if (rc == -ETXTBSY) {
752 int oplock = FALSE;
753 __u16 netfid;
754
755 rc = CIFSSMBOpen(xid, pTcon, full_path,
756 FILE_OPEN, DELETE,
757 CREATE_NOT_DIR |
758 CREATE_DELETE_ON_CLOSE,
759 &netfid, &oplock, NULL,
760 cifs_sb->local_nls,
761 cifs_sb->mnt_cifs_flags &
762 CIFS_MOUNT_MAP_SPECIAL_CHR);
763 if (rc == 0) {
764 CIFSSMBRenameOpenFile(xid, pTcon,
765 netfid, NULL,
766 cifs_sb->local_nls,
767 cifs_sb->mnt_cifs_flags &
768 CIFS_MOUNT_MAP_SPECIAL_CHR);
769 CIFSSMBClose(xid, pTcon, netfid);
770 if (direntry->d_inode)
771 drop_nlink(direntry->d_inode);
772 }
773 /* BB if rc = -ETXTBUSY goto the rename logic BB */
774 }
775 }
776 }
777 if (direntry->d_inode) {
778 cifsInode = CIFS_I(direntry->d_inode);
779 cifsInode->time = 0; /* will force revalidate to get info
780 when needed */
781 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
782 }
783 if (inode) {
784 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
785 cifsInode = CIFS_I(inode);
786 cifsInode->time = 0; /* force revalidate of dir as well */
787 }
788
789 kfree(full_path);
790 FreeXid(xid);
791 return rc;
792 }
793
794 static void posix_fill_in_inode(struct inode *tmp_inode,
795 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
796 {
797 loff_t local_size;
798 struct timespec local_mtime;
799
800 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
801 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
802
803 __u32 type = le32_to_cpu(pData->Type);
804 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
805 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
806 cifsInfo->time = jiffies;
807 atomic_inc(&cifsInfo->inUse);
808
809 /* save mtime and size */
810 local_mtime = tmp_inode->i_mtime;
811 local_size = tmp_inode->i_size;
812
813 tmp_inode->i_atime =
814 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
815 tmp_inode->i_mtime =
816 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
817 tmp_inode->i_ctime =
818 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
819
820 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
821 /* since we set the inode type below we need to mask off type
822 to avoid strange results if bits above were corrupt */
823 tmp_inode->i_mode &= ~S_IFMT;
824 if (type == UNIX_FILE) {
825 *pobject_type = DT_REG;
826 tmp_inode->i_mode |= S_IFREG;
827 } else if (type == UNIX_SYMLINK) {
828 *pobject_type = DT_LNK;
829 tmp_inode->i_mode |= S_IFLNK;
830 } else if (type == UNIX_DIR) {
831 *pobject_type = DT_DIR;
832 tmp_inode->i_mode |= S_IFDIR;
833 } else if (type == UNIX_CHARDEV) {
834 *pobject_type = DT_CHR;
835 tmp_inode->i_mode |= S_IFCHR;
836 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
837 le64_to_cpu(pData->DevMinor) & MINORMASK);
838 } else if (type == UNIX_BLOCKDEV) {
839 *pobject_type = DT_BLK;
840 tmp_inode->i_mode |= S_IFBLK;
841 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
842 le64_to_cpu(pData->DevMinor) & MINORMASK);
843 } else if (type == UNIX_FIFO) {
844 *pobject_type = DT_FIFO;
845 tmp_inode->i_mode |= S_IFIFO;
846 } else if (type == UNIX_SOCKET) {
847 *pobject_type = DT_SOCK;
848 tmp_inode->i_mode |= S_IFSOCK;
849 } else {
850 /* safest to just call it a file */
851 *pobject_type = DT_REG;
852 tmp_inode->i_mode |= S_IFREG;
853 cFYI(1, ("unknown inode type %d", type));
854 }
855
856 #ifdef CONFIG_CIFS_DEBUG2
857 cFYI(1, ("object type: %d", type));
858 #endif
859 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
860 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
861 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
862
863 spin_lock(&tmp_inode->i_lock);
864 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
865 /* can not safely change the file size here if the
866 client is writing to it due to potential races */
867 i_size_write(tmp_inode, end_of_file);
868
869 /* 512 bytes (2**9) is the fake blocksize that must be used */
870 /* for this calculation, not the real blocksize */
871 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
872 }
873 spin_unlock(&tmp_inode->i_lock);
874
875 if (S_ISREG(tmp_inode->i_mode)) {
876 cFYI(1, ("File inode"));
877 tmp_inode->i_op = &cifs_file_inode_ops;
878
879 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
880 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
881 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
882 else
883 tmp_inode->i_fop = &cifs_file_direct_ops;
884
885 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
886 tmp_inode->i_fop = &cifs_file_nobrl_ops;
887 else
888 tmp_inode->i_fop = &cifs_file_ops;
889
890 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
891 (cifs_sb->tcon->ses->server->maxBuf <
892 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
893 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
894 else
895 tmp_inode->i_data.a_ops = &cifs_addr_ops;
896
897 if (isNewInode)
898 return; /* No sense invalidating pages for new inode
899 since we we have not started caching
900 readahead file data yet */
901
902 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
903 (local_size == tmp_inode->i_size)) {
904 cFYI(1, ("inode exists but unchanged"));
905 } else {
906 /* file may have changed on server */
907 cFYI(1, ("invalidate inode, readdir detected change"));
908 invalidate_remote_inode(tmp_inode);
909 }
910 } else if (S_ISDIR(tmp_inode->i_mode)) {
911 cFYI(1, ("Directory inode"));
912 tmp_inode->i_op = &cifs_dir_inode_ops;
913 tmp_inode->i_fop = &cifs_dir_ops;
914 } else if (S_ISLNK(tmp_inode->i_mode)) {
915 cFYI(1, ("Symbolic Link inode"));
916 tmp_inode->i_op = &cifs_symlink_inode_ops;
917 /* tmp_inode->i_fop = *//* do not need to set to anything */
918 } else {
919 cFYI(1, ("Special inode"));
920 init_special_inode(tmp_inode, tmp_inode->i_mode,
921 tmp_inode->i_rdev);
922 }
923 }
924
925 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
926 {
927 int rc = 0;
928 int xid;
929 struct cifs_sb_info *cifs_sb;
930 struct cifsTconInfo *pTcon;
931 char *full_path = NULL;
932 struct inode *newinode = NULL;
933
934 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
935
936 xid = GetXid();
937
938 cifs_sb = CIFS_SB(inode->i_sb);
939 pTcon = cifs_sb->tcon;
940
941 full_path = build_path_from_dentry(direntry);
942 if (full_path == NULL) {
943 FreeXid(xid);
944 return -ENOMEM;
945 }
946
947 if ((pTcon->ses->capabilities & CAP_UNIX) &&
948 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
949 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
950 u32 oplock = 0;
951 FILE_UNIX_BASIC_INFO *pInfo =
952 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
953 if (pInfo == NULL) {
954 rc = -ENOMEM;
955 goto mkdir_out;
956 }
957
958 mode &= ~current->fs->umask;
959 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
960 mode, NULL /* netfid */, pInfo, &oplock,
961 full_path, cifs_sb->local_nls,
962 cifs_sb->mnt_cifs_flags &
963 CIFS_MOUNT_MAP_SPECIAL_CHR);
964 if (rc == -EOPNOTSUPP) {
965 kfree(pInfo);
966 goto mkdir_retry_old;
967 } else if (rc) {
968 cFYI(1, ("posix mkdir returned 0x%x", rc));
969 d_drop(direntry);
970 } else {
971 int obj_type;
972 if (pInfo->Type == cpu_to_le32(-1)) {
973 /* no return info, go query for it */
974 kfree(pInfo);
975 goto mkdir_get_info;
976 }
977 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
978 to set uid/gid */
979 inc_nlink(inode);
980 if (pTcon->nocase)
981 direntry->d_op = &cifs_ci_dentry_ops;
982 else
983 direntry->d_op = &cifs_dentry_ops;
984
985 newinode = new_inode(inode->i_sb);
986 if (newinode == NULL) {
987 kfree(pInfo);
988 goto mkdir_get_info;
989 }
990 /* Is an i_ino of zero legal? */
991 /* Are there sanity checks we can use to ensure that
992 the server is really filling in that field? */
993 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
994 newinode->i_ino =
995 (unsigned long)pInfo->UniqueId;
996 } /* note ino incremented to unique num in new_inode */
997 if (inode->i_sb->s_flags & MS_NOATIME)
998 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
999 newinode->i_nlink = 2;
1000
1001 insert_inode_hash(newinode);
1002 d_instantiate(direntry, newinode);
1003
1004 /* we already checked in POSIXCreate whether
1005 frame was long enough */
1006 posix_fill_in_inode(direntry->d_inode,
1007 pInfo, &obj_type, 1 /* NewInode */);
1008 #ifdef CONFIG_CIFS_DEBUG2
1009 cFYI(1, ("instantiated dentry %p %s to inode %p",
1010 direntry, direntry->d_name.name, newinode));
1011
1012 if (newinode->i_nlink != 2)
1013 cFYI(1, ("unexpected number of links %d",
1014 newinode->i_nlink));
1015 #endif
1016 }
1017 kfree(pInfo);
1018 goto mkdir_out;
1019 }
1020 mkdir_retry_old:
1021 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1022 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1023 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1024 if (rc) {
1025 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1026 d_drop(direntry);
1027 } else {
1028 mkdir_get_info:
1029 inc_nlink(inode);
1030 if (pTcon->unix_ext)
1031 rc = cifs_get_inode_info_unix(&newinode, full_path,
1032 inode->i_sb, xid);
1033 else
1034 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1035 inode->i_sb, xid);
1036
1037 if (pTcon->nocase)
1038 direntry->d_op = &cifs_ci_dentry_ops;
1039 else
1040 direntry->d_op = &cifs_dentry_ops;
1041 d_instantiate(direntry, newinode);
1042 /* setting nlink not necessary except in cases where we
1043 * failed to get it from the server or was set bogus */
1044 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1045 direntry->d_inode->i_nlink = 2;
1046 if (pTcon->unix_ext) {
1047 mode &= ~current->fs->umask;
1048 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1049 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1050 mode,
1051 (__u64)current->fsuid,
1052 (__u64)current->fsgid,
1053 0 /* dev_t */,
1054 cifs_sb->local_nls,
1055 cifs_sb->mnt_cifs_flags &
1056 CIFS_MOUNT_MAP_SPECIAL_CHR);
1057 } else {
1058 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1059 mode, (__u64)-1,
1060 (__u64)-1, 0 /* dev_t */,
1061 cifs_sb->local_nls,
1062 cifs_sb->mnt_cifs_flags &
1063 CIFS_MOUNT_MAP_SPECIAL_CHR);
1064 }
1065 } else {
1066 /* BB to be implemented via Windows secrty descriptors
1067 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1068 -1, -1, local_nls); */
1069 if (direntry->d_inode) {
1070 direntry->d_inode->i_mode = mode;
1071 direntry->d_inode->i_mode |= S_IFDIR;
1072 if (cifs_sb->mnt_cifs_flags &
1073 CIFS_MOUNT_SET_UID) {
1074 direntry->d_inode->i_uid =
1075 current->fsuid;
1076 direntry->d_inode->i_gid =
1077 current->fsgid;
1078 }
1079 }
1080 }
1081 }
1082 mkdir_out:
1083 kfree(full_path);
1084 FreeXid(xid);
1085 return rc;
1086 }
1087
1088 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1089 {
1090 int rc = 0;
1091 int xid;
1092 struct cifs_sb_info *cifs_sb;
1093 struct cifsTconInfo *pTcon;
1094 char *full_path = NULL;
1095 struct cifsInodeInfo *cifsInode;
1096
1097 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1098
1099 xid = GetXid();
1100
1101 cifs_sb = CIFS_SB(inode->i_sb);
1102 pTcon = cifs_sb->tcon;
1103
1104 full_path = build_path_from_dentry(direntry);
1105 if (full_path == NULL) {
1106 FreeXid(xid);
1107 return -ENOMEM;
1108 }
1109
1110 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1111 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1112
1113 if (!rc) {
1114 drop_nlink(inode);
1115 spin_lock(&direntry->d_inode->i_lock);
1116 i_size_write(direntry->d_inode, 0);
1117 clear_nlink(direntry->d_inode);
1118 spin_unlock(&direntry->d_inode->i_lock);
1119 }
1120
1121 cifsInode = CIFS_I(direntry->d_inode);
1122 cifsInode->time = 0; /* force revalidate to go get info when
1123 needed */
1124 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1125 current_fs_time(inode->i_sb);
1126
1127 kfree(full_path);
1128 FreeXid(xid);
1129 return rc;
1130 }
1131
1132 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1133 struct inode *target_inode, struct dentry *target_direntry)
1134 {
1135 char *fromName;
1136 char *toName;
1137 struct cifs_sb_info *cifs_sb_source;
1138 struct cifs_sb_info *cifs_sb_target;
1139 struct cifsTconInfo *pTcon;
1140 int xid;
1141 int rc = 0;
1142
1143 xid = GetXid();
1144
1145 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1146 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1147 pTcon = cifs_sb_source->tcon;
1148
1149 if (pTcon != cifs_sb_target->tcon) {
1150 FreeXid(xid);
1151 return -EXDEV; /* BB actually could be allowed if same server,
1152 but different share.
1153 Might eventually add support for this */
1154 }
1155
1156 /* we already have the rename sem so we do not need to grab it again
1157 here to protect the path integrity */
1158 fromName = build_path_from_dentry(source_direntry);
1159 toName = build_path_from_dentry(target_direntry);
1160 if ((fromName == NULL) || (toName == NULL)) {
1161 rc = -ENOMEM;
1162 goto cifs_rename_exit;
1163 }
1164
1165 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1166 cifs_sb_source->local_nls,
1167 cifs_sb_source->mnt_cifs_flags &
1168 CIFS_MOUNT_MAP_SPECIAL_CHR);
1169 if (rc == -EEXIST) {
1170 /* check if they are the same file because rename of hardlinked
1171 files is a noop */
1172 FILE_UNIX_BASIC_INFO *info_buf_source;
1173 FILE_UNIX_BASIC_INFO *info_buf_target;
1174
1175 info_buf_source =
1176 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1177 if (info_buf_source != NULL) {
1178 info_buf_target = info_buf_source + 1;
1179 if (pTcon->unix_ext)
1180 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1181 info_buf_source,
1182 cifs_sb_source->local_nls,
1183 cifs_sb_source->mnt_cifs_flags &
1184 CIFS_MOUNT_MAP_SPECIAL_CHR);
1185 /* else rc is still EEXIST so will fall through to
1186 unlink the target and retry rename */
1187 if (rc == 0) {
1188 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1189 info_buf_target,
1190 cifs_sb_target->local_nls,
1191 /* remap based on source sb */
1192 cifs_sb_source->mnt_cifs_flags &
1193 CIFS_MOUNT_MAP_SPECIAL_CHR);
1194 }
1195 if ((rc == 0) &&
1196 (info_buf_source->UniqueId ==
1197 info_buf_target->UniqueId)) {
1198 /* do not rename since the files are hardlinked which
1199 is a noop */
1200 } else {
1201 /* we either can not tell the files are hardlinked
1202 (as with Windows servers) or files are not
1203 hardlinked so delete the target manually before
1204 renaming to follow POSIX rather than Windows
1205 semantics */
1206 cifs_unlink(target_inode, target_direntry);
1207 rc = CIFSSMBRename(xid, pTcon, fromName,
1208 toName,
1209 cifs_sb_source->local_nls,
1210 cifs_sb_source->mnt_cifs_flags
1211 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1212 }
1213 kfree(info_buf_source);
1214 } /* if we can not get memory just leave rc as EEXIST */
1215 }
1216
1217 if (rc) {
1218 cFYI(1, ("rename rc %d", rc));
1219 }
1220
1221 if ((rc == -EIO) || (rc == -EEXIST)) {
1222 int oplock = FALSE;
1223 __u16 netfid;
1224
1225 /* BB FIXME Is Generic Read correct for rename? */
1226 /* if renaming directory - we should not say CREATE_NOT_DIR,
1227 need to test renaming open directory, also GENERIC_READ
1228 might not right be right access to request */
1229 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1230 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1231 cifs_sb_source->local_nls,
1232 cifs_sb_source->mnt_cifs_flags &
1233 CIFS_MOUNT_MAP_SPECIAL_CHR);
1234 if (rc == 0) {
1235 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1236 cifs_sb_source->local_nls,
1237 cifs_sb_source->mnt_cifs_flags &
1238 CIFS_MOUNT_MAP_SPECIAL_CHR);
1239 CIFSSMBClose(xid, pTcon, netfid);
1240 }
1241 }
1242
1243 cifs_rename_exit:
1244 kfree(fromName);
1245 kfree(toName);
1246 FreeXid(xid);
1247 return rc;
1248 }
1249
1250 int cifs_revalidate(struct dentry *direntry)
1251 {
1252 int xid;
1253 int rc = 0, wbrc = 0;
1254 char *full_path;
1255 struct cifs_sb_info *cifs_sb;
1256 struct cifsInodeInfo *cifsInode;
1257 loff_t local_size;
1258 struct timespec local_mtime;
1259 int invalidate_inode = FALSE;
1260
1261 if (direntry->d_inode == NULL)
1262 return -ENOENT;
1263
1264 cifsInode = CIFS_I(direntry->d_inode);
1265
1266 if (cifsInode == NULL)
1267 return -ENOENT;
1268
1269 /* no sense revalidating inode info on file that no one can write */
1270 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1271 return rc;
1272
1273 xid = GetXid();
1274
1275 cifs_sb = CIFS_SB(direntry->d_sb);
1276
1277 /* can not safely grab the rename sem here if rename calls revalidate
1278 since that would deadlock */
1279 full_path = build_path_from_dentry(direntry);
1280 if (full_path == NULL) {
1281 FreeXid(xid);
1282 return -ENOMEM;
1283 }
1284 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1285 "jiffies %ld", full_path, direntry->d_inode,
1286 direntry->d_inode->i_count.counter, direntry,
1287 direntry->d_time, jiffies));
1288
1289 if (cifsInode->time == 0) {
1290 /* was set to zero previously to force revalidate */
1291 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1292 lookupCacheEnabled) {
1293 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1294 (direntry->d_inode->i_nlink == 1)) {
1295 kfree(full_path);
1296 FreeXid(xid);
1297 return rc;
1298 } else {
1299 cFYI(1, ("Have to revalidate file due to hardlinks"));
1300 }
1301 }
1302
1303 /* save mtime and size */
1304 local_mtime = direntry->d_inode->i_mtime;
1305 local_size = direntry->d_inode->i_size;
1306
1307 if (cifs_sb->tcon->unix_ext) {
1308 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1309 direntry->d_sb, xid);
1310 if (rc) {
1311 cFYI(1, ("error on getting revalidate info %d", rc));
1312 /* if (rc != -ENOENT)
1313 rc = 0; */ /* BB should we cache info on
1314 certain errors? */
1315 }
1316 } else {
1317 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1318 direntry->d_sb, xid);
1319 if (rc) {
1320 cFYI(1, ("error on getting revalidate info %d", rc));
1321 /* if (rc != -ENOENT)
1322 rc = 0; */ /* BB should we cache info on
1323 certain errors? */
1324 }
1325 }
1326 /* should we remap certain errors, access denied?, to zero */
1327
1328 /* if not oplocked, we invalidate inode pages if mtime or file size
1329 had changed on server */
1330
1331 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1332 (local_size == direntry->d_inode->i_size)) {
1333 cFYI(1, ("cifs_revalidate - inode unchanged"));
1334 } else {
1335 /* file may have changed on server */
1336 if (cifsInode->clientCanCacheRead) {
1337 /* no need to invalidate inode pages since we were the
1338 only ones who could have modified the file and the
1339 server copy is staler than ours */
1340 } else {
1341 invalidate_inode = TRUE;
1342 }
1343 }
1344
1345 /* can not grab this sem since kernel filesys locking documentation
1346 indicates i_mutex may be taken by the kernel on lookup and rename
1347 which could deadlock if we grab the i_mutex here as well */
1348 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1349 /* need to write out dirty pages here */
1350 if (direntry->d_inode->i_mapping) {
1351 /* do we need to lock inode until after invalidate completes
1352 below? */
1353 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1354 if (wbrc)
1355 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1356 }
1357 if (invalidate_inode) {
1358 /* shrink_dcache not necessary now that cifs dentry ops
1359 are exported for negative dentries */
1360 /* if (S_ISDIR(direntry->d_inode->i_mode))
1361 shrink_dcache_parent(direntry); */
1362 if (S_ISREG(direntry->d_inode->i_mode)) {
1363 if (direntry->d_inode->i_mapping)
1364 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1365 if (wbrc)
1366 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1367 /* may eventually have to do this for open files too */
1368 if (list_empty(&(cifsInode->openFileList))) {
1369 /* changed on server - flush read ahead pages */
1370 cFYI(1, ("Invalidating read ahead data on "
1371 "closed file"));
1372 invalidate_remote_inode(direntry->d_inode);
1373 }
1374 }
1375 }
1376 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1377
1378 kfree(full_path);
1379 FreeXid(xid);
1380 return rc;
1381 }
1382
1383 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1384 struct kstat *stat)
1385 {
1386 int err = cifs_revalidate(dentry);
1387 if (!err) {
1388 generic_fillattr(dentry->d_inode, stat);
1389 stat->blksize = CIFS_MAX_MSGSIZE;
1390 }
1391 return err;
1392 }
1393
1394 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1395 {
1396 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1397 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1398 struct page *page;
1399 int rc = 0;
1400
1401 page = grab_cache_page(mapping, index);
1402 if (!page)
1403 return -ENOMEM;
1404
1405 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1406 unlock_page(page);
1407 page_cache_release(page);
1408 return rc;
1409 }
1410
1411 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1412 {
1413 struct address_space *mapping = inode->i_mapping;
1414 unsigned long limit;
1415
1416 spin_lock(&inode->i_lock);
1417 if (inode->i_size < offset)
1418 goto do_expand;
1419 /*
1420 * truncation of in-use swapfiles is disallowed - it would cause
1421 * subsequent swapout to scribble on the now-freed blocks.
1422 */
1423 if (IS_SWAPFILE(inode)) {
1424 spin_unlock(&inode->i_lock);
1425 goto out_busy;
1426 }
1427 i_size_write(inode, offset);
1428 spin_unlock(&inode->i_lock);
1429 /*
1430 * unmap_mapping_range is called twice, first simply for efficiency
1431 * so that truncate_inode_pages does fewer single-page unmaps. However
1432 * after this first call, and before truncate_inode_pages finishes,
1433 * it is possible for private pages to be COWed, which remain after
1434 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1435 * call must be made for correctness.
1436 */
1437 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1438 truncate_inode_pages(mapping, offset);
1439 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1440 goto out_truncate;
1441
1442 do_expand:
1443 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1444 if (limit != RLIM_INFINITY && offset > limit) {
1445 spin_unlock(&inode->i_lock);
1446 goto out_sig;
1447 }
1448 if (offset > inode->i_sb->s_maxbytes) {
1449 spin_unlock(&inode->i_lock);
1450 goto out_big;
1451 }
1452 i_size_write(inode, offset);
1453 spin_unlock(&inode->i_lock);
1454 out_truncate:
1455 if (inode->i_op && inode->i_op->truncate)
1456 inode->i_op->truncate(inode);
1457 return 0;
1458 out_sig:
1459 send_sig(SIGXFSZ, current, 0);
1460 out_big:
1461 return -EFBIG;
1462 out_busy:
1463 return -ETXTBSY;
1464 }
1465
1466 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1467 {
1468 int xid;
1469 struct cifs_sb_info *cifs_sb;
1470 struct cifsTconInfo *pTcon;
1471 char *full_path = NULL;
1472 int rc = -EACCES;
1473 struct cifsFileInfo *open_file = NULL;
1474 FILE_BASIC_INFO time_buf;
1475 int set_time = FALSE;
1476 int set_dosattr = FALSE;
1477 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1478 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1479 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1480 struct cifsInodeInfo *cifsInode;
1481
1482 xid = GetXid();
1483
1484 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1485 direntry->d_name.name, attrs->ia_valid));
1486
1487 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1488 pTcon = cifs_sb->tcon;
1489
1490 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1491 /* check if we have permission to change attrs */
1492 rc = inode_change_ok(direntry->d_inode, attrs);
1493 if (rc < 0) {
1494 FreeXid(xid);
1495 return rc;
1496 } else
1497 rc = 0;
1498 }
1499
1500 full_path = build_path_from_dentry(direntry);
1501 if (full_path == NULL) {
1502 FreeXid(xid);
1503 return -ENOMEM;
1504 }
1505 cifsInode = CIFS_I(direntry->d_inode);
1506
1507 /* BB check if we need to refresh inode from server now ? BB */
1508
1509 if (attrs->ia_valid & ATTR_SIZE) {
1510 /*
1511 Flush data before changing file size on server. If the
1512 flush returns error, store it to report later and continue.
1513 BB: This should be smarter. Why bother flushing pages that
1514 will be truncated anyway? Also, should we error out here if
1515 the flush returns error?
1516 */
1517 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1518 if (rc != 0) {
1519 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1520 rc = 0;
1521 }
1522
1523 /* To avoid spurious oplock breaks from server, in the case of
1524 inodes that we already have open, avoid doing path based
1525 setting of file size if we can do it by handle.
1526 This keeps our caching token (oplock) and avoids timeouts
1527 when the local oplock break takes longer to flush
1528 writebehind data than the SMB timeout for the SetPathInfo
1529 request would allow */
1530
1531 open_file = find_writable_file(cifsInode);
1532 if (open_file) {
1533 __u16 nfid = open_file->netfid;
1534 __u32 npid = open_file->pid;
1535 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1536 nfid, npid, FALSE);
1537 atomic_dec(&open_file->wrtPending);
1538 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1539 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1540 unsigned int bytes_written;
1541 rc = CIFSSMBWrite(xid, pTcon,
1542 nfid, 0, attrs->ia_size,
1543 &bytes_written, NULL, NULL,
1544 1 /* 45 seconds */);
1545 cFYI(1, ("Wrt seteof rc %d", rc));
1546 }
1547 } else
1548 rc = -EINVAL;
1549
1550 if (rc != 0) {
1551 /* Set file size by pathname rather than by handle
1552 either because no valid, writeable file handle for
1553 it was found or because there was an error setting
1554 it by handle */
1555 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1556 attrs->ia_size, FALSE,
1557 cifs_sb->local_nls,
1558 cifs_sb->mnt_cifs_flags &
1559 CIFS_MOUNT_MAP_SPECIAL_CHR);
1560 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1561 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1562 __u16 netfid;
1563 int oplock = FALSE;
1564
1565 rc = SMBLegacyOpen(xid, pTcon, full_path,
1566 FILE_OPEN,
1567 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1568 CREATE_NOT_DIR, &netfid, &oplock,
1569 NULL, cifs_sb->local_nls,
1570 cifs_sb->mnt_cifs_flags &
1571 CIFS_MOUNT_MAP_SPECIAL_CHR);
1572 if (rc == 0) {
1573 unsigned int bytes_written;
1574 rc = CIFSSMBWrite(xid, pTcon,
1575 netfid, 0,
1576 attrs->ia_size,
1577 &bytes_written, NULL,
1578 NULL, 1 /* 45 sec */);
1579 cFYI(1, ("wrt seteof rc %d", rc));
1580 CIFSSMBClose(xid, pTcon, netfid);
1581 }
1582
1583 }
1584 }
1585
1586 /* Server is ok setting allocation size implicitly - no need
1587 to call:
1588 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1589 cifs_sb->local_nls);
1590 */
1591
1592 if (rc == 0) {
1593 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1594 cifs_truncate_page(direntry->d_inode->i_mapping,
1595 direntry->d_inode->i_size);
1596 } else
1597 goto cifs_setattr_exit;
1598 }
1599 if (attrs->ia_valid & ATTR_UID) {
1600 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1601 uid = attrs->ia_uid;
1602 }
1603 if (attrs->ia_valid & ATTR_GID) {
1604 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1605 gid = attrs->ia_gid;
1606 }
1607
1608 time_buf.Attributes = 0;
1609
1610 /* skip mode change if it's just for clearing setuid/setgid */
1611 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1612 attrs->ia_valid &= ~ATTR_MODE;
1613
1614 if (attrs->ia_valid & ATTR_MODE) {
1615 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1616 mode = attrs->ia_mode;
1617 }
1618
1619 if ((pTcon->unix_ext)
1620 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1621 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1622 0 /* dev_t */, cifs_sb->local_nls,
1623 cifs_sb->mnt_cifs_flags &
1624 CIFS_MOUNT_MAP_SPECIAL_CHR);
1625 else if (attrs->ia_valid & ATTR_MODE) {
1626 rc = 0;
1627 #ifdef CONFIG_CIFS_EXPERIMENTAL
1628 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1629 rc = mode_to_acl(direntry->d_inode, full_path, mode);
1630 else if ((mode & S_IWUGO) == 0) {
1631 #else
1632 if ((mode & S_IWUGO) == 0) {
1633 #endif
1634 /* not writeable */
1635 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1636 set_dosattr = TRUE;
1637 time_buf.Attributes =
1638 cpu_to_le32(cifsInode->cifsAttrs |
1639 ATTR_READONLY);
1640 }
1641 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1642 /* If file is readonly on server, we would
1643 not be able to write to it - so if any write
1644 bit is enabled for user or group or other we
1645 need to at least try to remove r/o dos attr */
1646 set_dosattr = TRUE;
1647 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1648 (~ATTR_READONLY));
1649 /* Windows ignores set to zero */
1650 if (time_buf.Attributes == 0)
1651 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1652 }
1653 #ifdef CONFIG_CIFS_EXPERIMENTAL
1654 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1655 mode_to_acl(direntry->d_inode, full_path, mode);
1656 #endif
1657 }
1658
1659 if (attrs->ia_valid & ATTR_ATIME) {
1660 set_time = TRUE;
1661 time_buf.LastAccessTime =
1662 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1663 } else
1664 time_buf.LastAccessTime = 0;
1665
1666 if (attrs->ia_valid & ATTR_MTIME) {
1667 set_time = TRUE;
1668 time_buf.LastWriteTime =
1669 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1670 } else
1671 time_buf.LastWriteTime = 0;
1672 /* Do not set ctime explicitly unless other time
1673 stamps are changed explicitly (i.e. by utime()
1674 since we would then have a mix of client and
1675 server times */
1676
1677 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1678 set_time = TRUE;
1679 /* Although Samba throws this field away
1680 it may be useful to Windows - but we do
1681 not want to set ctime unless some other
1682 timestamp is changing */
1683 cFYI(1, ("CIFS - CTIME changed"));
1684 time_buf.ChangeTime =
1685 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1686 } else
1687 time_buf.ChangeTime = 0;
1688
1689 if (set_time || set_dosattr) {
1690 time_buf.CreationTime = 0; /* do not change */
1691 /* In the future we should experiment - try setting timestamps
1692 via Handle (SetFileInfo) instead of by path */
1693 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1694 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1695 cifs_sb->local_nls,
1696 cifs_sb->mnt_cifs_flags &
1697 CIFS_MOUNT_MAP_SPECIAL_CHR);
1698 else
1699 rc = -EOPNOTSUPP;
1700
1701 if (rc == -EOPNOTSUPP) {
1702 int oplock = FALSE;
1703 __u16 netfid;
1704
1705 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1706 "times not supported by this server"));
1707 /* BB we could scan to see if we already have it open
1708 and pass in pid of opener to function */
1709 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1710 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1711 CREATE_NOT_DIR, &netfid, &oplock,
1712 NULL, cifs_sb->local_nls,
1713 cifs_sb->mnt_cifs_flags &
1714 CIFS_MOUNT_MAP_SPECIAL_CHR);
1715 if (rc == 0) {
1716 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1717 netfid);
1718 CIFSSMBClose(xid, pTcon, netfid);
1719 } else {
1720 /* BB For even older servers we could convert time_buf
1721 into old DOS style which uses two second
1722 granularity */
1723
1724 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1725 &time_buf, cifs_sb->local_nls); */
1726 }
1727 }
1728 /* Even if error on time set, no sense failing the call if
1729 the server would set the time to a reasonable value anyway,
1730 and this check ensures that we are not being called from
1731 sys_utimes in which case we ought to fail the call back to
1732 the user when the server rejects the call */
1733 if ((rc) && (attrs->ia_valid &
1734 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1735 rc = 0;
1736 }
1737
1738 /* do not need local check to inode_check_ok since the server does
1739 that */
1740 if (!rc)
1741 rc = inode_setattr(direntry->d_inode, attrs);
1742 cifs_setattr_exit:
1743 kfree(full_path);
1744 FreeXid(xid);
1745 return rc;
1746 }
1747
1748 #if 0
1749 void cifs_delete_inode(struct inode *inode)
1750 {
1751 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1752 /* may have to add back in if and when safe distributed caching of
1753 directories added e.g. via FindNotify */
1754 }
1755 #endif
x86 "subsystem" repository