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[CIFS] Add support for legacy servers part seven. Fix open for write,
[deliverable/linux.git] / fs / cifs / inode.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/inode.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2005
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/buffer_head.h>
23#include <linux/stat.h>
24#include <linux/pagemap.h>
25#include <asm/div64.h>
26#include "cifsfs.h"
27#include "cifspdu.h"
28#include "cifsglob.h"
29#include "cifsproto.h"
30#include "cifs_debug.h"
31#include "cifs_fs_sb.h"
32
33int cifs_get_inode_info_unix(struct inode **pinode,
34 const unsigned char *search_path, struct super_block *sb, int xid)
35{
36 int rc = 0;
37 FILE_UNIX_BASIC_INFO findData;
38 struct cifsTconInfo *pTcon;
39 struct inode *inode;
40 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
41 char *tmp_path;
42
43 pTcon = cifs_sb->tcon;
44 cFYI(1, (" Getting info on %s ", search_path));
45 /* could have done a find first instead but this returns more info */
46 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
737b758c
SF		 47 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
48 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 49/* dump_mem("\nUnixQPathInfo return data", &findData,
50 sizeof(findData)); */
51 if (rc) {
52 if (rc == -EREMOTE) {
53 tmp_path =
54 kmalloc(strnlen(pTcon->treeName,
55 MAX_TREE_SIZE + 1) +
56 strnlen(search_path, MAX_PATHCONF) + 1,
57 GFP_KERNEL);
58 if (tmp_path == NULL) {
59 return -ENOMEM;
60 }
61 /* have to skip first of the double backslash of
62 UNC name */
63 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
64 strncat(tmp_path, search_path, MAX_PATHCONF);
65 rc = connect_to_dfs_path(xid, pTcon->ses,
66 /* treename + */ tmp_path,
737b758c
SF		 67 cifs_sb->local_nls,
68 cifs_sb->mnt_cifs_flags &
69 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 70 kfree(tmp_path);
71
72 /* BB fix up inode etc. */
73 } else if (rc) {
74 return rc;
75 }
76 } else {
77 struct cifsInodeInfo *cifsInfo;
78 __u32 type = le32_to_cpu(findData.Type);
79 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
80 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
81
82 /* get new inode */
83 if (*pinode == NULL) {
84 *pinode = new_inode(sb);
d0d2f2df 85 if (*pinode == NULL)
1da177e4
LT		 86 return -ENOMEM;
87 /* Is an i_ino of zero legal? */
88 /* Are there sanity checks we can use to ensure that
89 the server is really filling in that field? */
d0d2f2df 90 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1da177e4
LT		 91 (*pinode)->i_ino =
92 (unsigned long)findData.UniqueId;
93 } /* note ino incremented to unique num in new_inode */
94 insert_inode_hash(*pinode);
95 }
96
97 inode = *pinode;
98 cifsInfo = CIFS_I(inode);
99
100 cFYI(1, (" Old time %ld ", cifsInfo->time));
101 cifsInfo->time = jiffies;
102 cFYI(1, (" New time %ld ", cifsInfo->time));
103 /* this is ok to set on every inode revalidate */
104 atomic_set(&cifsInfo->inUse,1);
105
106 inode->i_atime =
107 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
108 inode->i_mtime =
109 cifs_NTtimeToUnix(le64_to_cpu
110 (findData.LastModificationTime));
111 inode->i_ctime =
112 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
113 inode->i_mode = le64_to_cpu(findData.Permissions);
114 if (type == UNIX_FILE) {
115 inode->i_mode |= S_IFREG;
116 } else if (type == UNIX_SYMLINK) {
117 inode->i_mode |= S_IFLNK;
118 } else if (type == UNIX_DIR) {
119 inode->i_mode |= S_IFDIR;
120 } else if (type == UNIX_CHARDEV) {
121 inode->i_mode |= S_IFCHR;
122 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
123 le64_to_cpu(findData.DevMinor) & MINORMASK);
124 } else if (type == UNIX_BLOCKDEV) {
125 inode->i_mode |= S_IFBLK;
126 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
127 le64_to_cpu(findData.DevMinor) & MINORMASK);
128 } else if (type == UNIX_FIFO) {
129 inode->i_mode |= S_IFIFO;
130 } else if (type == UNIX_SOCKET) {
131 inode->i_mode |= S_IFSOCK;
132 }
133 inode->i_uid = le64_to_cpu(findData.Uid);
134 inode->i_gid = le64_to_cpu(findData.Gid);
135 inode->i_nlink = le64_to_cpu(findData.Nlinks);
136
d0d2f2df 137 if (is_size_safe_to_change(cifsInfo)) {
1da177e4
LT		 138 /* can not safely change the file size here if the
139 client is writing to it due to potential races */
140
141 i_size_write(inode, end_of_file);
142
143 /* blksize needs to be multiple of two. So safer to default to
144 blksize and blkbits set in superblock so 2**blkbits and blksize
145 will match rather than setting to:
146 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
147
148 /* This seems incredibly stupid but it turns out that i_blocks
149 is not related to (i_size / i_blksize), instead 512 byte size
150 is required for calculating num blocks */
151
152 /* 512 bytes (2**9) is the fake blocksize that must be used */
153 /* for this calculation */
154 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
155 }
156
157 if (num_of_bytes < end_of_file)
158 cFYI(1, ("allocation size less than end of file "));
159 cFYI(1,
160 ("Size %ld and blocks %ld",
161 (unsigned long) inode->i_size, inode->i_blocks));
162 if (S_ISREG(inode->i_mode)) {
163 cFYI(1, (" File inode "));
164 inode->i_op = &cifs_file_inode_ops;
d0d2f2df 165 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
1da177e4
LT		 166 inode->i_fop = &cifs_file_direct_ops;
167 else
168 inode->i_fop = &cifs_file_ops;
c46fa8ac
SF		 169 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
170 inode->i_fop->lock = NULL;
1da177e4 171 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 172 /* check if server can support readpages */
173 if(pTcon->ses->server->maxBuf <
174 4096 + MAX_CIFS_HDR_SIZE)
175 inode->i_data.a_ops->readpages = NULL;
1da177e4
LT		 176 } else if (S_ISDIR(inode->i_mode)) {
177 cFYI(1, (" Directory inode"));
178 inode->i_op = &cifs_dir_inode_ops;
179 inode->i_fop = &cifs_dir_ops;
180 } else if (S_ISLNK(inode->i_mode)) {
181 cFYI(1, (" Symbolic Link inode "));
182 inode->i_op = &cifs_symlink_inode_ops;
183 /* tmp_inode->i_fop = */ /* do not need to set to anything */
184 } else {
185 cFYI(1, (" Init special inode "));
186 init_special_inode(inode, inode->i_mode,
187 inode->i_rdev);
188 }
189 }
190 return rc;
191}
192
193int cifs_get_inode_info(struct inode **pinode,
194 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
195 struct super_block *sb, int xid)
196{
197 int rc = 0;
198 struct cifsTconInfo *pTcon;
199 struct inode *inode;
200 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
201 char *tmp_path;
202 char *buf = NULL;
203
204 pTcon = cifs_sb->tcon;
205 cFYI(1,("Getting info on %s ", search_path));
206
d0d2f2df
SF		 207 if ((pfindData == NULL) && (*pinode != NULL)) {
208 if (CIFS_I(*pinode)->clientCanCacheRead) {
1da177e4
LT		 209 cFYI(1,("No need to revalidate cached inode sizes"));
210 return rc;
211 }
212 }
213
214 /* if file info not passed in then get it from server */
d0d2f2df 215 if (pfindData == NULL) {
1da177e4 216 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 217 if (buf == NULL)
1da177e4
LT		 218 return -ENOMEM;
219 pfindData = (FILE_ALL_INFO *)buf;
220 /* could do find first instead but this returns more info */
221 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
6b8edfe0 222 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 223 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 224 /* BB optimize code so we do not make the above call
225 when server claims no NT SMB support and the above call
226 failed at least once - set flag in tcon or mount */
227 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
228 rc = SMBQueryInformation(xid, pTcon, search_path,
229 pfindData, cifs_sb->local_nls,
230 cifs_sb->mnt_cifs_flags &
231 CIFS_MOUNT_MAP_SPECIAL_CHR);
232 }
233
1da177e4
LT		 234 }
235 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
236 if (rc) {
237 if (rc == -EREMOTE) {
238 tmp_path =
239 kmalloc(strnlen
240 (pTcon->treeName,
241 MAX_TREE_SIZE + 1) +
242 strnlen(search_path, MAX_PATHCONF) + 1,
243 GFP_KERNEL);
244 if (tmp_path == NULL) {
245 kfree(buf);
246 return -ENOMEM;
247 }
248
249 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
250 strncat(tmp_path, search_path, MAX_PATHCONF);
251 rc = connect_to_dfs_path(xid, pTcon->ses,
252 /* treename + */ tmp_path,
737b758c
SF		 253 cifs_sb->local_nls,
254 cifs_sb->mnt_cifs_flags &
255 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 256 kfree(tmp_path);
257 /* BB fix up inode etc. */
258 } else if (rc) {
259 kfree(buf);
260 return rc;
261 }
262 } else {
263 struct cifsInodeInfo *cifsInfo;
264 __u32 attr = le32_to_cpu(pfindData->Attributes);
265
266 /* get new inode */
267 if (*pinode == NULL) {
268 *pinode = new_inode(sb);
269 if (*pinode == NULL)
270 return -ENOMEM;
271 /* Is an i_ino of zero legal? Can we use that to check
272 if the server supports returning inode numbers? Are
273 there other sanity checks we can use to ensure that
274 the server is really filling in that field? */
275
276 /* We can not use the IndexNumber field by default from
277 Windows or Samba (in ALL_INFO buf) but we can request
278 it explicitly. It may not be unique presumably if
279 the server has multiple devices mounted under one
280 share */
281
282 /* There may be higher info levels that work but are
283 there Windows server or network appliances for which
284 IndexNumber field is not guaranteed unique? */
285
286#ifdef CONFIG_CIFS_EXPERIMENTAL
d0d2f2df 287 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 288 int rc1 = 0;
289 __u64 inode_num;
290
291 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
292 search_path, &inode_num,
737b758c
SF		 293 cifs_sb->local_nls,
294 cifs_sb->mnt_cifs_flags &
295 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 296 if (rc1) {
1da177e4
LT		 297 cFYI(1,("GetSrvInodeNum rc %d", rc1));
298 /* BB EOPNOSUPP disable SERVER_INUM? */
299 } else /* do we need cast or hash to ino? */
300 (*pinode)->i_ino = inode_num;
301 } /* else ino incremented to unique num in new_inode*/
302#endif /* CIFS_EXPERIMENTAL */
303 insert_inode_hash(*pinode);
304 }
305 inode = *pinode;
306 cifsInfo = CIFS_I(inode);
307 cifsInfo->cifsAttrs = attr;
308 cFYI(1, (" Old time %ld ", cifsInfo->time));
309 cifsInfo->time = jiffies;
310 cFYI(1, (" New time %ld ", cifsInfo->time));
311
312 /* blksize needs to be multiple of two. So safer to default to
313 blksize and blkbits set in superblock so 2**blkbits and blksize
314 will match rather than setting to:
315 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
316
317 /* Linux can not store file creation time unfortunately so we ignore it */
318 inode->i_atime =
319 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
320 inode->i_mtime =
321 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
322 inode->i_ctime =
323 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
324 cFYI(0, (" Attributes came in as 0x%x ", attr));
325
326 /* set default mode. will override for dirs below */
327 if (atomic_read(&cifsInfo->inUse) == 0)
328 /* new inode, can safely set these fields */
329 inode->i_mode = cifs_sb->mnt_file_mode;
330
331/* if (attr & ATTR_REPARSE) */
332 /* We no longer handle these as symlinks because we could not
333 follow them due to the absolute path with drive letter */
334 if (attr & ATTR_DIRECTORY) {
335 /* override default perms since we do not do byte range locking
336 on dirs */
337 inode->i_mode = cifs_sb->mnt_dir_mode;
338 inode->i_mode |= S_IFDIR;
eda3c029
SF		 339 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
340 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
341 /* No need to le64 convert size of zero */
342 (pfindData->EndOfFile == 0)) {
343 inode->i_mode = cifs_sb->mnt_file_mode;
344 inode->i_mode |= S_IFIFO;
345/* BB Finish for SFU style symlinks and devies */
346/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
347 (cifsInfo->cifsAttrs & ATTR_SYSTEM) && ) */
348
1da177e4
LT		 349 } else {
350 inode->i_mode |= S_IFREG;
351 /* treat the dos attribute of read-only as read-only
352 mode e.g. 555 */
353 if (cifsInfo->cifsAttrs & ATTR_READONLY)
354 inode->i_mode &= ~(S_IWUGO);
355 /* BB add code here -
356 validate if device or weird share or device type? */
357 }
358 if (is_size_safe_to_change(cifsInfo)) {
359 /* can not safely change the file size here if the
360 client is writing to it due to potential races */
361 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
362
363 /* 512 bytes (2**9) is the fake blocksize that must be
364 used for this calculation */
365 inode->i_blocks = (512 - 1 + le64_to_cpu(
366 pfindData->AllocationSize)) >> 9;
367 }
368
369 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
370
371 /* BB fill in uid and gid here? with help from winbind?
372 or retrieve from NTFS stream extended attribute */
373 if (atomic_read(&cifsInfo->inUse) == 0) {
374 inode->i_uid = cifs_sb->mnt_uid;
375 inode->i_gid = cifs_sb->mnt_gid;
376 /* set so we do not keep refreshing these fields with
377 bad data after user has changed them in memory */
378 atomic_set(&cifsInfo->inUse,1);
379 }
380
381 if (S_ISREG(inode->i_mode)) {
382 cFYI(1, (" File inode "));
383 inode->i_op = &cifs_file_inode_ops;
d0d2f2df 384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
1da177e4
LT		 385 inode->i_fop = &cifs_file_direct_ops;
386 else
387 inode->i_fop = &cifs_file_ops;
c46fa8ac
SF		 388 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
389 inode->i_fop->lock = NULL;
1da177e4 390 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 391 if(pTcon->ses->server->maxBuf <
392 4096 + MAX_CIFS_HDR_SIZE)
393 inode->i_data.a_ops->readpages = NULL;
1da177e4
LT		 394 } else if (S_ISDIR(inode->i_mode)) {
395 cFYI(1, (" Directory inode "));
396 inode->i_op = &cifs_dir_inode_ops;
397 inode->i_fop = &cifs_dir_ops;
398 } else if (S_ISLNK(inode->i_mode)) {
399 cFYI(1, (" Symbolic Link inode "));
400 inode->i_op = &cifs_symlink_inode_ops;
401 } else {
402 init_special_inode(inode, inode->i_mode,
403 inode->i_rdev);
404 }
405 }
406 kfree(buf);
407 return rc;
408}
409
410/* gets root inode */
411void cifs_read_inode(struct inode *inode)
412{
413 int xid;
414 struct cifs_sb_info *cifs_sb;
415
416 cifs_sb = CIFS_SB(inode->i_sb);
417 xid = GetXid();
418 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
419 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
420 else
421 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
422 /* can not call macro FreeXid here since in a void func */
423 _FreeXid(xid);
424}
425
426int cifs_unlink(struct inode *inode, struct dentry *direntry)
427{
428 int rc = 0;
429 int xid;
430 struct cifs_sb_info *cifs_sb;
431 struct cifsTconInfo *pTcon;
432 char *full_path = NULL;
433 struct cifsInodeInfo *cifsInode;
434 FILE_BASIC_INFO *pinfo_buf;
435
436 cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
437
438 xid = GetXid();
439
440 cifs_sb = CIFS_SB(inode->i_sb);
441 pTcon = cifs_sb->tcon;
442
443 /* Unlink can be called from rename so we can not grab the sem here
444 since we deadlock otherwise */
445/* down(&direntry->d_sb->s_vfs_rename_sem);*/
7f57356b 446 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 447/* up(&direntry->d_sb->s_vfs_rename_sem);*/
448 if (full_path == NULL) {
449 FreeXid(xid);
450 return -ENOMEM;
451 }
737b758c
SF		 452 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
453 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 454
455 if (!rc) {
d0d2f2df 456 if (direntry->d_inode)
b2aeb9d5 457 direntry->d_inode->i_nlink--;
1da177e4
LT		 458 } else if (rc == -ENOENT) {
459 d_drop(direntry);
460 } else if (rc == -ETXTBSY) {
461 int oplock = FALSE;
462 __u16 netfid;
463
464 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
465 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 466 &netfid, &oplock, NULL, cifs_sb->local_nls,
467 cifs_sb->mnt_cifs_flags &
468 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 469 if (rc==0) {
470 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 471 cifs_sb->local_nls,
472 cifs_sb->mnt_cifs_flags &
473 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 474 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 475 if (direntry->d_inode)
b2aeb9d5 476 direntry->d_inode->i_nlink--;
1da177e4
LT		 477 }
478 } else if (rc == -EACCES) {
479 /* try only if r/o attribute set in local lookup data? */
480 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
481 if (pinfo_buf) {
482 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
483 /* ATTRS set to normal clears r/o bit */
484 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
485 if (!(pTcon->ses->flags & CIFS_SES_NT4))
486 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
487 pinfo_buf,
737b758c
SF		 488 cifs_sb->local_nls,
489 cifs_sb->mnt_cifs_flags &
490 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 491 else
492 rc = -EOPNOTSUPP;
493
494 if (rc == -EOPNOTSUPP) {
495 int oplock = FALSE;
496 __u16 netfid;
497 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
498 full_path,
499 (__u16)ATTR_NORMAL,
500 cifs_sb->local_nls);
501 For some strange reason it seems that NT4 eats the
502 old setattr call without actually setting the
503 attributes so on to the third attempted workaround
504 */
505
506 /* BB could scan to see if we already have it open
507 and pass in pid of opener to function */
508 rc = CIFSSMBOpen(xid, pTcon, full_path,
509 FILE_OPEN, SYNCHRONIZE |
510 FILE_WRITE_ATTRIBUTES, 0,
511 &netfid, &oplock, NULL,
737b758c
SF		 512 cifs_sb->local_nls,
513 cifs_sb->mnt_cifs_flags &
514 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 515 if (rc==0) {
516 rc = CIFSSMBSetFileTimes(xid, pTcon,
517 pinfo_buf,
518 netfid);
519 CIFSSMBClose(xid, pTcon, netfid);
520 }
521 }
522 kfree(pinfo_buf);
523 }
524 if (rc==0) {
737b758c
SF		 525 rc = CIFSSMBDelFile(xid, pTcon, full_path,
526 cifs_sb->local_nls,
527 cifs_sb->mnt_cifs_flags &
528 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 529 if (!rc) {
d0d2f2df 530 if (direntry->d_inode)
b2aeb9d5 531 direntry->d_inode->i_nlink--;
1da177e4
LT		 532 } else if (rc == -ETXTBSY) {
533 int oplock = FALSE;
534 __u16 netfid;
535
536 rc = CIFSSMBOpen(xid, pTcon, full_path,
537 FILE_OPEN, DELETE,
538 CREATE_NOT_DIR |
539 CREATE_DELETE_ON_CLOSE,
540 &netfid, &oplock, NULL,
737b758c
SF		 541 cifs_sb->local_nls,
542 cifs_sb->mnt_cifs_flags &
543 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 544 if (rc==0) {
545 CIFSSMBRenameOpenFile(xid, pTcon,
546 netfid, NULL,
737b758c
SF		 547 cifs_sb->local_nls,
548 cifs_sb->mnt_cifs_flags &
549 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 550 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 551 if (direntry->d_inode)
b2aeb9d5 552 direntry->d_inode->i_nlink--;
1da177e4
LT		 553 }
554 /* BB if rc = -ETXTBUSY goto the rename logic BB */
555 }
556 }
557 }
d0d2f2df 558 if (direntry->d_inode) {
b2aeb9d5
SF		 559 cifsInode = CIFS_I(direntry->d_inode);
560 cifsInode->time = 0; /* will force revalidate to get info
561 when needed */
562 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
563 }
564 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
1da177e4
LT		 565 cifsInode = CIFS_I(inode);
566 cifsInode->time = 0; /* force revalidate of dir as well */
567
568 kfree(full_path);
569 FreeXid(xid);
570 return rc;
571}
572
573int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
574{
575 int rc = 0;
576 int xid;
577 struct cifs_sb_info *cifs_sb;
578 struct cifsTconInfo *pTcon;
579 char *full_path = NULL;
580 struct inode *newinode = NULL;
581
582 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
583
584 xid = GetXid();
585
586 cifs_sb = CIFS_SB(inode->i_sb);
587 pTcon = cifs_sb->tcon;
588
589 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 590 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 591 up(&inode->i_sb->s_vfs_rename_sem);
592 if (full_path == NULL) {
593 FreeXid(xid);
594 return -ENOMEM;
595 }
596 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 597 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
598 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 599 if (rc) {
600 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
601 d_drop(direntry);
602 } else {
603 inode->i_nlink++;
604 if (pTcon->ses->capabilities & CAP_UNIX)
605 rc = cifs_get_inode_info_unix(&newinode, full_path,
606 inode->i_sb,xid);
607 else
608 rc = cifs_get_inode_info(&newinode, full_path, NULL,
609 inode->i_sb,xid);
610
b92327fe
SF		 611 if (pTcon->nocase)
612 direntry->d_op = &cifs_ci_dentry_ops;
613 else
614 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 615 d_instantiate(direntry, newinode);
616 if (direntry->d_inode)
617 direntry->d_inode->i_nlink = 2;
618 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 619 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 620 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
621 mode,
622 (__u64)current->euid,
623 (__u64)current->egid,
624 0 /* dev_t */,
737b758c
SF		 625 cifs_sb->local_nls,
626 cifs_sb->mnt_cifs_flags &
627 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 628 } else {
629 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
630 mode, (__u64)-1,
631 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 632 cifs_sb->local_nls,
633 cifs_sb->mnt_cifs_flags &
634 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 635 }
636 else {
637 /* BB to be implemented via Windows secrty descriptors
638 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
639 -1, -1, local_nls); */
640 }
641 }
642 kfree(full_path);
643 FreeXid(xid);
644 return rc;
645}
646
647int cifs_rmdir(struct inode *inode, struct dentry *direntry)
648{
649 int rc = 0;
650 int xid;
651 struct cifs_sb_info *cifs_sb;
652 struct cifsTconInfo *pTcon;
653 char *full_path = NULL;
654 struct cifsInodeInfo *cifsInode;
655
656 cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
657
658 xid = GetXid();
659
660 cifs_sb = CIFS_SB(inode->i_sb);
661 pTcon = cifs_sb->tcon;
662
663 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 664 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 665 up(&inode->i_sb->s_vfs_rename_sem);
666 if (full_path == NULL) {
667 FreeXid(xid);
668 return -ENOMEM;
669 }
670
737b758c
SF		 671 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
672 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 673
674 if (!rc) {
675 inode->i_nlink--;
676 i_size_write(direntry->d_inode,0);
677 direntry->d_inode->i_nlink = 0;
678 }
679
680 cifsInode = CIFS_I(direntry->d_inode);
681 cifsInode->time = 0; /* force revalidate to go get info when
682 needed */
683 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
684 current_fs_time(inode->i_sb);
685
686 kfree(full_path);
687 FreeXid(xid);
688 return rc;
689}
690
691int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
692 struct inode *target_inode, struct dentry *target_direntry)
693{
694 char *fromName;
695 char *toName;
696 struct cifs_sb_info *cifs_sb_source;
697 struct cifs_sb_info *cifs_sb_target;
698 struct cifsTconInfo *pTcon;
699 int xid;
700 int rc = 0;
701
702 xid = GetXid();
703
704 cifs_sb_target = CIFS_SB(target_inode->i_sb);
705 cifs_sb_source = CIFS_SB(source_inode->i_sb);
706 pTcon = cifs_sb_source->tcon;
707
708 if (pTcon != cifs_sb_target->tcon) {
709 FreeXid(xid);
710 return -EXDEV; /* BB actually could be allowed if same server,
711 but different share.
712 Might eventually add support for this */
713 }
714
715 /* we already have the rename sem so we do not need to grab it again
716 here to protect the path integrity */
7f57356b
SF		 717 fromName = build_path_from_dentry(source_direntry);
718 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 719 if ((fromName == NULL) || (toName == NULL)) {
720 rc = -ENOMEM;
721 goto cifs_rename_exit;
722 }
723
724 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 725 cifs_sb_source->local_nls,
726 cifs_sb_source->mnt_cifs_flags &
727 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 728 if (rc == -EEXIST) {
729 /* check if they are the same file because rename of hardlinked
730 files is a noop */
731 FILE_UNIX_BASIC_INFO *info_buf_source;
732 FILE_UNIX_BASIC_INFO *info_buf_target;
733
734 info_buf_source =
735 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
736 if (info_buf_source != NULL) {
737 info_buf_target = info_buf_source + 1;
738 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 739 info_buf_source, cifs_sb_source->local_nls,
740 cifs_sb_source->mnt_cifs_flags &
741 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 742 if (rc == 0) {
743 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
744 info_buf_target,
737b758c
SF		 745 cifs_sb_target->local_nls,
746 /* remap based on source sb */
747 cifs_sb_source->mnt_cifs_flags &
748 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 749 }
750 if ((rc == 0) &&
751 (info_buf_source->UniqueId ==
752 info_buf_target->UniqueId)) {
753 /* do not rename since the files are hardlinked which
754 is a noop */
755 } else {
756 /* we either can not tell the files are hardlinked
757 (as with Windows servers) or files are not
758 hardlinked so delete the target manually before
759 renaming to follow POSIX rather than Windows
760 semantics */
761 cifs_unlink(target_inode, target_direntry);
762 rc = CIFSSMBRename(xid, pTcon, fromName,
763 toName,
737b758c
SF		 764 cifs_sb_source->local_nls,
765 cifs_sb_source->mnt_cifs_flags
766 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 767 }
768 kfree(info_buf_source);
769 } /* if we can not get memory just leave rc as EEXIST */
770 }
771
772 if (rc) {
773 cFYI(1, ("rename rc %d", rc));
774 }
775
776 if ((rc == -EIO) || (rc == -EEXIST)) {
777 int oplock = FALSE;
778 __u16 netfid;
779
780 /* BB FIXME Is Generic Read correct for rename? */
781 /* if renaming directory - we should not say CREATE_NOT_DIR,
782 need to test renaming open directory, also GENERIC_READ
783 might not right be right access to request */
784 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
785 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 786 cifs_sb_source->local_nls,
787 cifs_sb_source->mnt_cifs_flags &
788 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 789 if (rc==0) {
790 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 791 cifs_sb_source->local_nls,
792 cifs_sb_source->mnt_cifs_flags &
793 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 794 CIFSSMBClose(xid, pTcon, netfid);
795 }
796 }
797
798cifs_rename_exit:
799 kfree(fromName);
800 kfree(toName);
801 FreeXid(xid);
802 return rc;
803}
804
805int cifs_revalidate(struct dentry *direntry)
806{
807 int xid;
808 int rc = 0;
809 char *full_path;
810 struct cifs_sb_info *cifs_sb;
811 struct cifsInodeInfo *cifsInode;
812 loff_t local_size;
813 struct timespec local_mtime;
814 int invalidate_inode = FALSE;
815
816 if (direntry->d_inode == NULL)
817 return -ENOENT;
818
819 cifsInode = CIFS_I(direntry->d_inode);
820
821 if (cifsInode == NULL)
822 return -ENOENT;
823
824 /* no sense revalidating inode info on file that no one can write */
825 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
826 return rc;
827
828 xid = GetXid();
829
830 cifs_sb = CIFS_SB(direntry->d_sb);
831
832 /* can not safely grab the rename sem here if rename calls revalidate
833 since that would deadlock */
7f57356b 834 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 835 if (full_path == NULL) {
836 FreeXid(xid);
837 return -ENOMEM;
838 }
839 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
840 "jiffies %ld", full_path, direntry->d_inode,
841 direntry->d_inode->i_count.counter, direntry,
842 direntry->d_time, jiffies));
843
844 if (cifsInode->time == 0) {
845 /* was set to zero previously to force revalidate */
846 } else if (time_before(jiffies, cifsInode->time + HZ) &&
847 lookupCacheEnabled) {
848 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
849 (direntry->d_inode->i_nlink == 1)) {
850 kfree(full_path);
851 FreeXid(xid);
852 return rc;
853 } else {
854 cFYI(1, ("Have to revalidate file due to hardlinks"));
855 }
856 }
857
858 /* save mtime and size */
859 local_mtime = direntry->d_inode->i_mtime;
860 local_size = direntry->d_inode->i_size;
861
862 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
863 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
864 direntry->d_sb,xid);
865 if (rc) {
866 cFYI(1, ("error on getting revalidate info %d", rc));
867/* if (rc != -ENOENT)
868 rc = 0; */ /* BB should we cache info on
869 certain errors? */
870 }
871 } else {
872 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
873 direntry->d_sb,xid);
874 if (rc) {
875 cFYI(1, ("error on getting revalidate info %d", rc));
876/* if (rc != -ENOENT)
877 rc = 0; */ /* BB should we cache info on
878 certain errors? */
879 }
880 }
881 /* should we remap certain errors, access denied?, to zero */
882
883 /* if not oplocked, we invalidate inode pages if mtime or file size
884 had changed on server */
885
886 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
887 (local_size == direntry->d_inode->i_size)) {
888 cFYI(1, ("cifs_revalidate - inode unchanged"));
889 } else {
890 /* file may have changed on server */
891 if (cifsInode->clientCanCacheRead) {
892 /* no need to invalidate inode pages since we were the
893 only ones who could have modified the file and the
894 server copy is staler than ours */
895 } else {
896 invalidate_inode = TRUE;
897 }
898 }
899
900 /* can not grab this sem since kernel filesys locking documentation
901 indicates i_sem may be taken by the kernel on lookup and rename
902 which could deadlock if we grab the i_sem here as well */
903/* down(&direntry->d_inode->i_sem);*/
904 /* need to write out dirty pages here */
905 if (direntry->d_inode->i_mapping) {
906 /* do we need to lock inode until after invalidate completes
907 below? */
908 filemap_fdatawrite(direntry->d_inode->i_mapping);
909 }
910 if (invalidate_inode) {
911 if (direntry->d_inode->i_mapping)
912 filemap_fdatawait(direntry->d_inode->i_mapping);
913 /* may eventually have to do this for open files too */
914 if (list_empty(&(cifsInode->openFileList))) {
915 /* Has changed on server - flush read ahead pages */
916 cFYI(1, ("Invalidating read ahead data on "
917 "closed file"));
918 invalidate_remote_inode(direntry->d_inode);
919 }
920 }
921/* up(&direntry->d_inode->i_sem); */
922
923 kfree(full_path);
924 FreeXid(xid);
925 return rc;
926}
927
928int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
929 struct kstat *stat)
930{
931 int err = cifs_revalidate(dentry);
932 if (!err)
933 generic_fillattr(dentry->d_inode, stat);
934 return err;
935}
936
937static int cifs_truncate_page(struct address_space *mapping, loff_t from)
938{
939 pgoff_t index = from >> PAGE_CACHE_SHIFT;
940 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
941 struct page *page;
942 char *kaddr;
943 int rc = 0;
944
945 page = grab_cache_page(mapping, index);
946 if (!page)
947 return -ENOMEM;
948
949 kaddr = kmap_atomic(page, KM_USER0);
950 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
951 flush_dcache_page(page);
952 kunmap_atomic(kaddr, KM_USER0);
953 unlock_page(page);
954 page_cache_release(page);
955 return rc;
956}
957
958int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
959{
960 int xid;
961 struct cifs_sb_info *cifs_sb;
962 struct cifsTconInfo *pTcon;
963 char *full_path = NULL;
964 int rc = -EACCES;
965 int found = FALSE;
966 struct cifsFileInfo *open_file = NULL;
967 FILE_BASIC_INFO time_buf;
968 int set_time = FALSE;
969 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
970 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
971 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
972 struct cifsInodeInfo *cifsInode;
973 struct list_head *tmp;
974
975 xid = GetXid();
976
977 cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
978 direntry->d_name.name, attrs->ia_valid));
979 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
980 pTcon = cifs_sb->tcon;
981
982 down(&direntry->d_sb->s_vfs_rename_sem);
7f57356b 983 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 984 up(&direntry->d_sb->s_vfs_rename_sem);
985 if (full_path == NULL) {
986 FreeXid(xid);
987 return -ENOMEM;
988 }
989 cifsInode = CIFS_I(direntry->d_inode);
990
991 /* BB check if we need to refresh inode from server now ? BB */
992
993 /* need to flush data before changing file size on server */
994 filemap_fdatawrite(direntry->d_inode->i_mapping);
995 filemap_fdatawait(direntry->d_inode->i_mapping);
996
997 if (attrs->ia_valid & ATTR_SIZE) {
998 read_lock(&GlobalSMBSeslock);
999 /* To avoid spurious oplock breaks from server, in the case of
1000 inodes that we already have open, avoid doing path based
1001 setting of file size if we can do it by handle.
1002 This keeps our caching token (oplock) and avoids timeouts
1003 when the local oplock break takes longer to flush
1004 writebehind data than the SMB timeout for the SetPathInfo
1005 request would allow */
1006 list_for_each(tmp, &cifsInode->openFileList) {
1007 open_file = list_entry(tmp, struct cifsFileInfo,
1008 flist);
1009 /* We check if file is open for writing first */
1010 if ((open_file->pfile) &&
1011 ((open_file->pfile->f_flags & O_RDWR) ||
1012 (open_file->pfile->f_flags & O_WRONLY))) {
1013 if (open_file->invalidHandle == FALSE) {
1014 /* we found a valid, writeable network
1015 file handle to use to try to set the
1016 file size */
1017 __u16 nfid = open_file->netfid;
1018 __u32 npid = open_file->pid;
1019 read_unlock(&GlobalSMBSeslock);
1020 found = TRUE;
1021 rc = CIFSSMBSetFileSize(xid, pTcon,
1022 attrs->ia_size, nfid, npid,
1023 FALSE);
1024 cFYI(1, ("SetFileSize by handle "
1025 "(setattrs) rc = %d", rc));
1026 /* Do not need reopen and retry on
1027 EAGAIN since we will retry by
1028 pathname below */
1029
1030 /* now that we found one valid file
1031 handle no sense continuing to loop
1032 trying others, so break here */
3e87d803
SF		 1033 /* if(rc == -EINVAL) {
1034 int bytes_written;
1035 rc = CIFSSMBWrite(xid, pTcon,
1036 nfid, 0,
1037 attrs->ia_size,
1038 &bytes_written,
1039 NULL, NULL, long_op);
1040 } */
1da177e4
LT		 1041 break;
1042 }
1043 }
1044 }
1045 if (found == FALSE)
1046 read_unlock(&GlobalSMBSeslock);
1047
1048 if (rc != 0) {
1049 /* Set file size by pathname rather than by handle
1050 either because no valid, writeable file handle for
1051 it was found or because there was an error setting
1052 it by handle */
1053 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1054 attrs->ia_size, FALSE,
737b758c
SF		 1055 cifs_sb->local_nls,
1056 cifs_sb->mnt_cifs_flags &
1057 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 1058 cFYI(1, (" SetEOF by path (setattrs) rc = %d", rc));
3e87d803
SF		 1059 /* if(rc == -EINVAL)
1060 old_style_set_eof_via_write(xid, pTcon,
1061 full_path,
1062 attrs->ia_size,
1063 cifs_sb->local_nls,
1064 cifs_sb->mnt_cifs_flags &
1065 CIFS_MOUNT_MAP_SPECIAL_CHR);*/
1da177e4
LT		 1066 }
1067
1068 /* Server is ok setting allocation size implicitly - no need
1069 to call:
1070 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1071 cifs_sb->local_nls);
1072 */
1073
1074 if (rc == 0) {
1075 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1076 cifs_truncate_page(direntry->d_inode->i_mapping,
1077 direntry->d_inode->i_size);
1078 }
1079 }
1080 if (attrs->ia_valid & ATTR_UID) {
1081 cFYI(1, (" CIFS - UID changed to %d", attrs->ia_uid));
1082 uid = attrs->ia_uid;
1083 /* entry->uid = cpu_to_le16(attr->ia_uid); */
1084 }
1085 if (attrs->ia_valid & ATTR_GID) {
1086 cFYI(1, (" CIFS - GID changed to %d", attrs->ia_gid));
1087 gid = attrs->ia_gid;
1088 /* entry->gid = cpu_to_le16(attr->ia_gid); */
1089 }
1090
1091 time_buf.Attributes = 0;
1092 if (attrs->ia_valid & ATTR_MODE) {
1093 cFYI(1, (" CIFS - Mode changed to 0x%x", attrs->ia_mode));
1094 mode = attrs->ia_mode;
1095 /* entry->mode = cpu_to_le16(attr->ia_mode); */
1096 }
1097
1098 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1099 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1100 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1101 0 /* dev_t */, cifs_sb->local_nls,
1102 cifs_sb->mnt_cifs_flags &
1103 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1104 else if (attrs->ia_valid & ATTR_MODE) {
1105 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1106 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1107 time_buf.Attributes =
1108 cpu_to_le32(cifsInode->cifsAttrs |
1109 ATTR_READONLY);
1110 } else if ((mode & S_IWUGO) == S_IWUGO) {
1111 if (cifsInode->cifsAttrs & ATTR_READONLY)
1112 time_buf.Attributes =
1113 cpu_to_le32(cifsInode->cifsAttrs &
1114 (~ATTR_READONLY));
1115 }
1116 /* BB to be implemented -
1117 via Windows security descriptors or streams */
1118 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1119 cifs_sb->local_nls); */
1120 }
1121
1122 if (attrs->ia_valid & ATTR_ATIME) {
1123 set_time = TRUE;
1124 time_buf.LastAccessTime =
1125 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1126 } else
1127 time_buf.LastAccessTime = 0;
1128
1129 if (attrs->ia_valid & ATTR_MTIME) {
1130 set_time = TRUE;
1131 time_buf.LastWriteTime =
1132 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1133 } else
1134 time_buf.LastWriteTime = 0;
1135
1136 if (attrs->ia_valid & ATTR_CTIME) {
1137 set_time = TRUE;
1138 cFYI(1, (" CIFS - CTIME changed ")); /* BB probably no need */
1139 time_buf.ChangeTime =
1140 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1141 } else
1142 time_buf.ChangeTime = 0;
1143
1144 if (set_time || time_buf.Attributes) {
1145 /* BB what if setting one attribute fails (such as size) but
1146 time setting works? */
1147 time_buf.CreationTime = 0; /* do not change */
1148 /* In the future we should experiment - try setting timestamps
1149 via Handle (SetFileInfo) instead of by path */
1150 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1151 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1152 cifs_sb->local_nls,
1153 cifs_sb->mnt_cifs_flags &
1154 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1155 else
1156 rc = -EOPNOTSUPP;
1157
1158 if (rc == -EOPNOTSUPP) {
1159 int oplock = FALSE;
1160 __u16 netfid;
1161
1162 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1163 "times not supported by this server"));
1164 /* BB we could scan to see if we already have it open
1165 and pass in pid of opener to function */
1166 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1167 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1168 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1169 NULL, cifs_sb->local_nls,
1170 cifs_sb->mnt_cifs_flags &
1171 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1172 if (rc==0) {
1173 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1174 netfid);
1175 CIFSSMBClose(xid, pTcon, netfid);
1176 } else {
1177 /* BB For even older servers we could convert time_buf
1178 into old DOS style which uses two second
1179 granularity */
1180
1181 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1182 &time_buf, cifs_sb->local_nls); */
1183 }
1184 }
1185 }
1186
1187 /* do not need local check to inode_check_ok since the server does
1188 that */
1189 if (!rc)
1190 rc = inode_setattr(direntry->d_inode, attrs);
1191 kfree(full_path);
1192 FreeXid(xid);
1193 return rc;
1194}
1195
1196void cifs_delete_inode(struct inode *inode)
1197{
1198 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1199 /* may have to add back in if and when safe distributed caching of
1200 directories added e.g. via FindNotify */
1201}
Linux kernel - Deliverables
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