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[CIFS] Fix spaces in cifs kconfig entry
[linux-2.6-block.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
d0d2f2df 286 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 287 int rc1 = 0;
288 __u64 inode_num;
289
290 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
291 search_path, &inode_num,
737b758c
SF		 292 cifs_sb->local_nls,
293 cifs_sb->mnt_cifs_flags &
294 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 295 if (rc1) {
1da177e4
LT		 296 cFYI(1,("GetSrvInodeNum rc %d", rc1));
297 /* BB EOPNOSUPP disable SERVER_INUM? */
298 } else /* do we need cast or hash to ino? */
299 (*pinode)->i_ino = inode_num;
300 } /* else ino incremented to unique num in new_inode*/
1da177e4
LT		 301 insert_inode_hash(*pinode);
302 }
303 inode = *pinode;
304 cifsInfo = CIFS_I(inode);
305 cifsInfo->cifsAttrs = attr;
306 cFYI(1, (" Old time %ld ", cifsInfo->time));
307 cifsInfo->time = jiffies;
308 cFYI(1, (" New time %ld ", cifsInfo->time));
309
310 /* blksize needs to be multiple of two. So safer to default to
311 blksize and blkbits set in superblock so 2**blkbits and blksize
312 will match rather than setting to:
313 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
314
315 /* Linux can not store file creation time unfortunately so we ignore it */
316 inode->i_atime =
317 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
318 inode->i_mtime =
319 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
320 inode->i_ctime =
321 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
322 cFYI(0, (" Attributes came in as 0x%x ", attr));
323
324 /* set default mode. will override for dirs below */
325 if (atomic_read(&cifsInfo->inUse) == 0)
326 /* new inode, can safely set these fields */
327 inode->i_mode = cifs_sb->mnt_file_mode;
328
329/* if (attr & ATTR_REPARSE) */
330 /* We no longer handle these as symlinks because we could not
331 follow them due to the absolute path with drive letter */
332 if (attr & ATTR_DIRECTORY) {
333 /* override default perms since we do not do byte range locking
334 on dirs */
335 inode->i_mode = cifs_sb->mnt_dir_mode;
336 inode->i_mode |= S_IFDIR;
eda3c029
SF		 337 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
338 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
339 /* No need to le64 convert size of zero */
340 (pfindData->EndOfFile == 0)) {
341 inode->i_mode = cifs_sb->mnt_file_mode;
342 inode->i_mode |= S_IFIFO;
343/* BB Finish for SFU style symlinks and devies */
344/* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
345 (cifsInfo->cifsAttrs & ATTR_SYSTEM) && ) */
346
1da177e4
LT		 347 } else {
348 inode->i_mode |= S_IFREG;
349 /* treat the dos attribute of read-only as read-only
350 mode e.g. 555 */
351 if (cifsInfo->cifsAttrs & ATTR_READONLY)
352 inode->i_mode &= ~(S_IWUGO);
353 /* BB add code here -
354 validate if device or weird share or device type? */
355 }
356 if (is_size_safe_to_change(cifsInfo)) {
357 /* can not safely change the file size here if the
358 client is writing to it due to potential races */
359 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
360
361 /* 512 bytes (2**9) is the fake blocksize that must be
362 used for this calculation */
363 inode->i_blocks = (512 - 1 + le64_to_cpu(
364 pfindData->AllocationSize)) >> 9;
365 }
366
367 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
368
369 /* BB fill in uid and gid here? with help from winbind?
370 or retrieve from NTFS stream extended attribute */
371 if (atomic_read(&cifsInfo->inUse) == 0) {
372 inode->i_uid = cifs_sb->mnt_uid;
373 inode->i_gid = cifs_sb->mnt_gid;
374 /* set so we do not keep refreshing these fields with
375 bad data after user has changed them in memory */
376 atomic_set(&cifsInfo->inUse,1);
377 }
378
379 if (S_ISREG(inode->i_mode)) {
380 cFYI(1, (" File inode "));
381 inode->i_op = &cifs_file_inode_ops;
d0d2f2df 382 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
1da177e4
LT		 383 inode->i_fop = &cifs_file_direct_ops;
384 else
385 inode->i_fop = &cifs_file_ops;
c46fa8ac
SF		 386 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
387 inode->i_fop->lock = NULL;
1da177e4 388 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 389 if(pTcon->ses->server->maxBuf <
390 4096 + MAX_CIFS_HDR_SIZE)
391 inode->i_data.a_ops->readpages = NULL;
1da177e4
LT		 392 } else if (S_ISDIR(inode->i_mode)) {
393 cFYI(1, (" Directory inode "));
394 inode->i_op = &cifs_dir_inode_ops;
395 inode->i_fop = &cifs_dir_ops;
396 } else if (S_ISLNK(inode->i_mode)) {
397 cFYI(1, (" Symbolic Link inode "));
398 inode->i_op = &cifs_symlink_inode_ops;
399 } else {
400 init_special_inode(inode, inode->i_mode,
401 inode->i_rdev);
402 }
403 }
404 kfree(buf);
405 return rc;
406}
407
408/* gets root inode */
409void cifs_read_inode(struct inode *inode)
410{
411 int xid;
412 struct cifs_sb_info *cifs_sb;
413
414 cifs_sb = CIFS_SB(inode->i_sb);
415 xid = GetXid();
416 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
417 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
418 else
419 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
420 /* can not call macro FreeXid here since in a void func */
421 _FreeXid(xid);
422}
423
424int cifs_unlink(struct inode *inode, struct dentry *direntry)
425{
426 int rc = 0;
427 int xid;
428 struct cifs_sb_info *cifs_sb;
429 struct cifsTconInfo *pTcon;
430 char *full_path = NULL;
431 struct cifsInodeInfo *cifsInode;
432 FILE_BASIC_INFO *pinfo_buf;
433
434 cFYI(1, (" cifs_unlink, inode = 0x%p with ", inode));
435
436 xid = GetXid();
437
438 cifs_sb = CIFS_SB(inode->i_sb);
439 pTcon = cifs_sb->tcon;
440
441 /* Unlink can be called from rename so we can not grab the sem here
442 since we deadlock otherwise */
443/* down(&direntry->d_sb->s_vfs_rename_sem);*/
7f57356b 444 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 445/* up(&direntry->d_sb->s_vfs_rename_sem);*/
446 if (full_path == NULL) {
447 FreeXid(xid);
448 return -ENOMEM;
449 }
737b758c
SF		 450 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
451 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 452
453 if (!rc) {
d0d2f2df 454 if (direntry->d_inode)
b2aeb9d5 455 direntry->d_inode->i_nlink--;
1da177e4
LT		 456 } else if (rc == -ENOENT) {
457 d_drop(direntry);
458 } else if (rc == -ETXTBSY) {
459 int oplock = FALSE;
460 __u16 netfid;
461
462 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
463 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 464 &netfid, &oplock, NULL, cifs_sb->local_nls,
465 cifs_sb->mnt_cifs_flags &
466 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 467 if (rc==0) {
468 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 469 cifs_sb->local_nls,
470 cifs_sb->mnt_cifs_flags &
471 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 472 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 473 if (direntry->d_inode)
b2aeb9d5 474 direntry->d_inode->i_nlink--;
1da177e4
LT		 475 }
476 } else if (rc == -EACCES) {
477 /* try only if r/o attribute set in local lookup data? */
478 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
479 if (pinfo_buf) {
480 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
481 /* ATTRS set to normal clears r/o bit */
482 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
483 if (!(pTcon->ses->flags & CIFS_SES_NT4))
484 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
485 pinfo_buf,
737b758c
SF		 486 cifs_sb->local_nls,
487 cifs_sb->mnt_cifs_flags &
488 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 489 else
490 rc = -EOPNOTSUPP;
491
492 if (rc == -EOPNOTSUPP) {
493 int oplock = FALSE;
494 __u16 netfid;
495 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
496 full_path,
497 (__u16)ATTR_NORMAL,
498 cifs_sb->local_nls);
499 For some strange reason it seems that NT4 eats the
500 old setattr call without actually setting the
501 attributes so on to the third attempted workaround
502 */
503
504 /* BB could scan to see if we already have it open
505 and pass in pid of opener to function */
506 rc = CIFSSMBOpen(xid, pTcon, full_path,
507 FILE_OPEN, SYNCHRONIZE |
508 FILE_WRITE_ATTRIBUTES, 0,
509 &netfid, &oplock, NULL,
737b758c
SF		 510 cifs_sb->local_nls,
511 cifs_sb->mnt_cifs_flags &
512 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 513 if (rc==0) {
514 rc = CIFSSMBSetFileTimes(xid, pTcon,
515 pinfo_buf,
516 netfid);
517 CIFSSMBClose(xid, pTcon, netfid);
518 }
519 }
520 kfree(pinfo_buf);
521 }
522 if (rc==0) {
737b758c
SF		 523 rc = CIFSSMBDelFile(xid, pTcon, full_path,
524 cifs_sb->local_nls,
525 cifs_sb->mnt_cifs_flags &
526 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 527 if (!rc) {
d0d2f2df 528 if (direntry->d_inode)
b2aeb9d5 529 direntry->d_inode->i_nlink--;
1da177e4
LT		 530 } else if (rc == -ETXTBSY) {
531 int oplock = FALSE;
532 __u16 netfid;
533
534 rc = CIFSSMBOpen(xid, pTcon, full_path,
535 FILE_OPEN, DELETE,
536 CREATE_NOT_DIR |
537 CREATE_DELETE_ON_CLOSE,
538 &netfid, &oplock, NULL,
737b758c
SF		 539 cifs_sb->local_nls,
540 cifs_sb->mnt_cifs_flags &
541 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 542 if (rc==0) {
543 CIFSSMBRenameOpenFile(xid, pTcon,
544 netfid, NULL,
737b758c
SF		 545 cifs_sb->local_nls,
546 cifs_sb->mnt_cifs_flags &
547 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 548 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 549 if (direntry->d_inode)
b2aeb9d5 550 direntry->d_inode->i_nlink--;
1da177e4
LT		 551 }
552 /* BB if rc = -ETXTBUSY goto the rename logic BB */
553 }
554 }
555 }
d0d2f2df 556 if (direntry->d_inode) {
b2aeb9d5
SF		 557 cifsInode = CIFS_I(direntry->d_inode);
558 cifsInode->time = 0; /* will force revalidate to get info
559 when needed */
560 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
561 }
562 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
1da177e4
LT		 563 cifsInode = CIFS_I(inode);
564 cifsInode->time = 0; /* force revalidate of dir as well */
565
566 kfree(full_path);
567 FreeXid(xid);
568 return rc;
569}
570
571int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
572{
573 int rc = 0;
574 int xid;
575 struct cifs_sb_info *cifs_sb;
576 struct cifsTconInfo *pTcon;
577 char *full_path = NULL;
578 struct inode *newinode = NULL;
579
580 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
581
582 xid = GetXid();
583
584 cifs_sb = CIFS_SB(inode->i_sb);
585 pTcon = cifs_sb->tcon;
586
587 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 588 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 589 up(&inode->i_sb->s_vfs_rename_sem);
590 if (full_path == NULL) {
591 FreeXid(xid);
592 return -ENOMEM;
593 }
594 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 595 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
596 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 597 if (rc) {
598 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
599 d_drop(direntry);
600 } else {
601 inode->i_nlink++;
602 if (pTcon->ses->capabilities & CAP_UNIX)
603 rc = cifs_get_inode_info_unix(&newinode, full_path,
604 inode->i_sb,xid);
605 else
606 rc = cifs_get_inode_info(&newinode, full_path, NULL,
607 inode->i_sb,xid);
608
b92327fe
SF		 609 if (pTcon->nocase)
610 direntry->d_op = &cifs_ci_dentry_ops;
611 else
612 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 613 d_instantiate(direntry, newinode);
614 if (direntry->d_inode)
615 direntry->d_inode->i_nlink = 2;
616 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 617 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 618 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
619 mode,
620 (__u64)current->euid,
621 (__u64)current->egid,
622 0 /* dev_t */,
737b758c
SF		 623 cifs_sb->local_nls,
624 cifs_sb->mnt_cifs_flags &
625 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 626 } else {
627 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
628 mode, (__u64)-1,
629 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 630 cifs_sb->local_nls,
631 cifs_sb->mnt_cifs_flags &
632 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 633 }
634 else {
635 /* BB to be implemented via Windows secrty descriptors
636 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
637 -1, -1, local_nls); */
638 }
639 }
640 kfree(full_path);
641 FreeXid(xid);
642 return rc;
643}
644
645int cifs_rmdir(struct inode *inode, struct dentry *direntry)
646{
647 int rc = 0;
648 int xid;
649 struct cifs_sb_info *cifs_sb;
650 struct cifsTconInfo *pTcon;
651 char *full_path = NULL;
652 struct cifsInodeInfo *cifsInode;
653
654 cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));
655
656 xid = GetXid();
657
658 cifs_sb = CIFS_SB(inode->i_sb);
659 pTcon = cifs_sb->tcon;
660
661 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 662 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 663 up(&inode->i_sb->s_vfs_rename_sem);
664 if (full_path == NULL) {
665 FreeXid(xid);
666 return -ENOMEM;
667 }
668
737b758c
SF		 669 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
670 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 671
672 if (!rc) {
673 inode->i_nlink--;
674 i_size_write(direntry->d_inode,0);
675 direntry->d_inode->i_nlink = 0;
676 }
677
678 cifsInode = CIFS_I(direntry->d_inode);
679 cifsInode->time = 0; /* force revalidate to go get info when
680 needed */
681 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
682 current_fs_time(inode->i_sb);
683
684 kfree(full_path);
685 FreeXid(xid);
686 return rc;
687}
688
689int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
690 struct inode *target_inode, struct dentry *target_direntry)
691{
692 char *fromName;
693 char *toName;
694 struct cifs_sb_info *cifs_sb_source;
695 struct cifs_sb_info *cifs_sb_target;
696 struct cifsTconInfo *pTcon;
697 int xid;
698 int rc = 0;
699
700 xid = GetXid();
701
702 cifs_sb_target = CIFS_SB(target_inode->i_sb);
703 cifs_sb_source = CIFS_SB(source_inode->i_sb);
704 pTcon = cifs_sb_source->tcon;
705
706 if (pTcon != cifs_sb_target->tcon) {
707 FreeXid(xid);
708 return -EXDEV; /* BB actually could be allowed if same server,
709 but different share.
710 Might eventually add support for this */
711 }
712
713 /* we already have the rename sem so we do not need to grab it again
714 here to protect the path integrity */
7f57356b
SF		 715 fromName = build_path_from_dentry(source_direntry);
716 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 717 if ((fromName == NULL) || (toName == NULL)) {
718 rc = -ENOMEM;
719 goto cifs_rename_exit;
720 }
721
722 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 723 cifs_sb_source->local_nls,
724 cifs_sb_source->mnt_cifs_flags &
725 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 726 if (rc == -EEXIST) {
727 /* check if they are the same file because rename of hardlinked
728 files is a noop */
729 FILE_UNIX_BASIC_INFO *info_buf_source;
730 FILE_UNIX_BASIC_INFO *info_buf_target;
731
732 info_buf_source =
733 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
734 if (info_buf_source != NULL) {
735 info_buf_target = info_buf_source + 1;
736 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 737 info_buf_source, cifs_sb_source->local_nls,
738 cifs_sb_source->mnt_cifs_flags &
739 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 740 if (rc == 0) {
741 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
742 info_buf_target,
737b758c
SF		 743 cifs_sb_target->local_nls,
744 /* remap based on source sb */
745 cifs_sb_source->mnt_cifs_flags &
746 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 747 }
748 if ((rc == 0) &&
749 (info_buf_source->UniqueId ==
750 info_buf_target->UniqueId)) {
751 /* do not rename since the files are hardlinked which
752 is a noop */
753 } else {
754 /* we either can not tell the files are hardlinked
755 (as with Windows servers) or files are not
756 hardlinked so delete the target manually before
757 renaming to follow POSIX rather than Windows
758 semantics */
759 cifs_unlink(target_inode, target_direntry);
760 rc = CIFSSMBRename(xid, pTcon, fromName,
761 toName,
737b758c
SF		 762 cifs_sb_source->local_nls,
763 cifs_sb_source->mnt_cifs_flags
764 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 765 }
766 kfree(info_buf_source);
767 } /* if we can not get memory just leave rc as EEXIST */
768 }
769
770 if (rc) {
771 cFYI(1, ("rename rc %d", rc));
772 }
773
774 if ((rc == -EIO) || (rc == -EEXIST)) {
775 int oplock = FALSE;
776 __u16 netfid;
777
778 /* BB FIXME Is Generic Read correct for rename? */
779 /* if renaming directory - we should not say CREATE_NOT_DIR,
780 need to test renaming open directory, also GENERIC_READ
781 might not right be right access to request */
782 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
783 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 784 cifs_sb_source->local_nls,
785 cifs_sb_source->mnt_cifs_flags &
786 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 787 if (rc==0) {
788 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 789 cifs_sb_source->local_nls,
790 cifs_sb_source->mnt_cifs_flags &
791 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 792 CIFSSMBClose(xid, pTcon, netfid);
793 }
794 }
795
796cifs_rename_exit:
797 kfree(fromName);
798 kfree(toName);
799 FreeXid(xid);
800 return rc;
801}
802
803int cifs_revalidate(struct dentry *direntry)
804{
805 int xid;
806 int rc = 0;
807 char *full_path;
808 struct cifs_sb_info *cifs_sb;
809 struct cifsInodeInfo *cifsInode;
810 loff_t local_size;
811 struct timespec local_mtime;
812 int invalidate_inode = FALSE;
813
814 if (direntry->d_inode == NULL)
815 return -ENOENT;
816
817 cifsInode = CIFS_I(direntry->d_inode);
818
819 if (cifsInode == NULL)
820 return -ENOENT;
821
822 /* no sense revalidating inode info on file that no one can write */
823 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
824 return rc;
825
826 xid = GetXid();
827
828 cifs_sb = CIFS_SB(direntry->d_sb);
829
830 /* can not safely grab the rename sem here if rename calls revalidate
831 since that would deadlock */
7f57356b 832 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 833 if (full_path == NULL) {
834 FreeXid(xid);
835 return -ENOMEM;
836 }
837 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
838 "jiffies %ld", full_path, direntry->d_inode,
839 direntry->d_inode->i_count.counter, direntry,
840 direntry->d_time, jiffies));
841
842 if (cifsInode->time == 0) {
843 /* was set to zero previously to force revalidate */
844 } else if (time_before(jiffies, cifsInode->time + HZ) &&
845 lookupCacheEnabled) {
846 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
847 (direntry->d_inode->i_nlink == 1)) {
848 kfree(full_path);
849 FreeXid(xid);
850 return rc;
851 } else {
852 cFYI(1, ("Have to revalidate file due to hardlinks"));
853 }
854 }
855
856 /* save mtime and size */
857 local_mtime = direntry->d_inode->i_mtime;
858 local_size = direntry->d_inode->i_size;
859
860 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
861 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
862 direntry->d_sb,xid);
863 if (rc) {
864 cFYI(1, ("error on getting revalidate info %d", rc));
865/* if (rc != -ENOENT)
866 rc = 0; */ /* BB should we cache info on
867 certain errors? */
868 }
869 } else {
870 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
871 direntry->d_sb,xid);
872 if (rc) {
873 cFYI(1, ("error on getting revalidate info %d", rc));
874/* if (rc != -ENOENT)
875 rc = 0; */ /* BB should we cache info on
876 certain errors? */
877 }
878 }
879 /* should we remap certain errors, access denied?, to zero */
880
881 /* if not oplocked, we invalidate inode pages if mtime or file size
882 had changed on server */
883
884 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
885 (local_size == direntry->d_inode->i_size)) {
886 cFYI(1, ("cifs_revalidate - inode unchanged"));
887 } else {
888 /* file may have changed on server */
889 if (cifsInode->clientCanCacheRead) {
890 /* no need to invalidate inode pages since we were the
891 only ones who could have modified the file and the
892 server copy is staler than ours */
893 } else {
894 invalidate_inode = TRUE;
895 }
896 }
897
898 /* can not grab this sem since kernel filesys locking documentation
899 indicates i_sem may be taken by the kernel on lookup and rename
900 which could deadlock if we grab the i_sem here as well */
901/* down(&direntry->d_inode->i_sem);*/
902 /* need to write out dirty pages here */
903 if (direntry->d_inode->i_mapping) {
904 /* do we need to lock inode until after invalidate completes
905 below? */
906 filemap_fdatawrite(direntry->d_inode->i_mapping);
907 }
908 if (invalidate_inode) {
909 if (direntry->d_inode->i_mapping)
910 filemap_fdatawait(direntry->d_inode->i_mapping);
911 /* may eventually have to do this for open files too */
912 if (list_empty(&(cifsInode->openFileList))) {
913 /* Has changed on server - flush read ahead pages */
914 cFYI(1, ("Invalidating read ahead data on "
915 "closed file"));
916 invalidate_remote_inode(direntry->d_inode);
917 }
918 }
919/* up(&direntry->d_inode->i_sem); */
920
921 kfree(full_path);
922 FreeXid(xid);
923 return rc;
924}
925
926int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
927 struct kstat *stat)
928{
929 int err = cifs_revalidate(dentry);
930 if (!err)
931 generic_fillattr(dentry->d_inode, stat);
932 return err;
933}
934
935static int cifs_truncate_page(struct address_space *mapping, loff_t from)
936{
937 pgoff_t index = from >> PAGE_CACHE_SHIFT;
938 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
939 struct page *page;
940 char *kaddr;
941 int rc = 0;
942
943 page = grab_cache_page(mapping, index);
944 if (!page)
945 return -ENOMEM;
946
947 kaddr = kmap_atomic(page, KM_USER0);
948 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
949 flush_dcache_page(page);
950 kunmap_atomic(kaddr, KM_USER0);
951 unlock_page(page);
952 page_cache_release(page);
953 return rc;
954}
955
956int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
957{
958 int xid;
959 struct cifs_sb_info *cifs_sb;
960 struct cifsTconInfo *pTcon;
961 char *full_path = NULL;
962 int rc = -EACCES;
1da177e4
LT		 963 struct cifsFileInfo *open_file = NULL;
964 FILE_BASIC_INFO time_buf;
965 int set_time = FALSE;
966 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
967 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
968 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
969 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 970
971 xid = GetXid();
972
973 cFYI(1, (" In cifs_setattr, name = %s attrs->iavalid 0x%x ",
974 direntry->d_name.name, attrs->ia_valid));
975 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
976 pTcon = cifs_sb->tcon;
977
978 down(&direntry->d_sb->s_vfs_rename_sem);
7f57356b 979 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 980 up(&direntry->d_sb->s_vfs_rename_sem);
981 if (full_path == NULL) {
982 FreeXid(xid);
983 return -ENOMEM;
984 }
985 cifsInode = CIFS_I(direntry->d_inode);
986
987 /* BB check if we need to refresh inode from server now ? BB */
988
989 /* need to flush data before changing file size on server */
990 filemap_fdatawrite(direntry->d_inode->i_mapping);
991 filemap_fdatawait(direntry->d_inode->i_mapping);
992
993 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 994 /* To avoid spurious oplock breaks from server, in the case of
995 inodes that we already have open, avoid doing path based
996 setting of file size if we can do it by handle.
997 This keeps our caching token (oplock) and avoids timeouts
998 when the local oplock break takes longer to flush
999 writebehind data than the SMB timeout for the SetPathInfo
1000 request would allow */
6148a742
SF		 1001 open_file = find_writable_file(cifsInode);
1002 if (open_file) {
1003 __u16 nfid = open_file->netfid;
1004 __u32 npid = open_file->pid;
1005 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1006 nfid, npid, FALSE);
23e7dd7d 1007 atomic_dec(&open_file->wrtPending);
6148a742
SF		 1008 cFYI(1,("SetFSize for attrs rc = %d", rc));
1009 if(rc == -EINVAL) {
1010 int bytes_written;
1011 rc = CIFSSMBWrite(xid, pTcon,
1012 nfid, 0, attrs->ia_size,
1013 &bytes_written, NULL, NULL,
1014 1 /* 45 seconds */);
1015 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4
LT		 1016 }
1017 }
1da177e4
LT		 1018 if (rc != 0) {
1019 /* Set file size by pathname rather than by handle
1020 either because no valid, writeable file handle for
1021 it was found or because there was an error setting
1022 it by handle */
1023 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1024 attrs->ia_size, FALSE,
737b758c
SF		 1025 cifs_sb->local_nls,
1026 cifs_sb->mnt_cifs_flags &
1027 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a
SF		 1028 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1029 if(rc == -EINVAL) {
1030 __u16 netfid;
1031 int oplock = FALSE;
1032
1033 rc = SMBLegacyOpen(xid, pTcon, full_path,
1034 FILE_OPEN,
1035 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1036 CREATE_NOT_DIR, &netfid, &oplock,
1037 NULL, cifs_sb->local_nls,
1038 cifs_sb->mnt_cifs_flags &
1039 CIFS_MOUNT_MAP_SPECIAL_CHR);
1040 if (rc==0) {
1041 int bytes_written;
1042 rc = CIFSSMBWrite(xid, pTcon,
1043 netfid, 0,
1044 attrs->ia_size,
1045 &bytes_written, NULL,
1046 NULL, 1 /* 45 sec */);
1047 cFYI(1,("wrt seteof rc %d",rc));
1048 CIFSSMBClose(xid, pTcon, netfid);
1049 }
1050
1051 }
1da177e4
LT		 1052 }
1053
1054 /* Server is ok setting allocation size implicitly - no need
1055 to call:
1056 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1057 cifs_sb->local_nls);
1058 */
1059
1060 if (rc == 0) {
1061 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1062 cifs_truncate_page(direntry->d_inode->i_mapping,
1063 direntry->d_inode->i_size);
e30dcf3a
SF		 1064 } else
1065 goto cifs_setattr_exit;
1da177e4
LT		 1066 }
1067 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1068 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1069 uid = attrs->ia_uid;
1da177e4
LT		 1070 }
1071 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1072 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1073 gid = attrs->ia_gid;
1da177e4
LT		 1074 }
1075
1076 time_buf.Attributes = 0;
1077 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1078 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1079 mode = attrs->ia_mode;
1da177e4
LT		 1080 }
1081
1082 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1083 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1084 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1085 0 /* dev_t */, cifs_sb->local_nls,
1086 cifs_sb->mnt_cifs_flags &
1087 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1088 else if (attrs->ia_valid & ATTR_MODE) {
1089 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1090 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1091 time_buf.Attributes =
1092 cpu_to_le32(cifsInode->cifsAttrs |
1093 ATTR_READONLY);
1094 } else if ((mode & S_IWUGO) == S_IWUGO) {
1095 if (cifsInode->cifsAttrs & ATTR_READONLY)
1096 time_buf.Attributes =
1097 cpu_to_le32(cifsInode->cifsAttrs &
1098 (~ATTR_READONLY));
1099 }
1100 /* BB to be implemented -
1101 via Windows security descriptors or streams */
1102 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1103 cifs_sb->local_nls); */
1104 }
1105
1106 if (attrs->ia_valid & ATTR_ATIME) {
1107 set_time = TRUE;
1108 time_buf.LastAccessTime =
1109 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1110 } else
1111 time_buf.LastAccessTime = 0;
1112
1113 if (attrs->ia_valid & ATTR_MTIME) {
1114 set_time = TRUE;
1115 time_buf.LastWriteTime =
1116 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1117 } else
1118 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1119 /* Do not set ctime explicitly unless other time
1120 stamps are changed explicitly (i.e. by utime()
1121 since we would then have a mix of client and
1122 server times */
1123
1124 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1125 set_time = TRUE;
e30dcf3a
SF		 1126 /* Although Samba throws this field away
1127 it may be useful to Windows - but we do
1128 not want to set ctime unless some other
1129 timestamp is changing */
1130 cFYI(1, ("CIFS - CTIME changed "));
1da177e4
LT		 1131 time_buf.ChangeTime =
1132 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1133 } else
1134 time_buf.ChangeTime = 0;
1135
1136 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1137 time_buf.CreationTime = 0; /* do not change */
1138 /* In the future we should experiment - try setting timestamps
1139 via Handle (SetFileInfo) instead of by path */
1140 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1141 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1142 cifs_sb->local_nls,
1143 cifs_sb->mnt_cifs_flags &
1144 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1145 else
1146 rc = -EOPNOTSUPP;
1147
1148 if (rc == -EOPNOTSUPP) {
1149 int oplock = FALSE;
1150 __u16 netfid;
1151
1152 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1153 "times not supported by this server"));
1154 /* BB we could scan to see if we already have it open
1155 and pass in pid of opener to function */
1156 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1157 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1158 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1159 NULL, cifs_sb->local_nls,
1160 cifs_sb->mnt_cifs_flags &
1161 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1162 if (rc==0) {
1163 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1164 netfid);
1165 CIFSSMBClose(xid, pTcon, netfid);
1166 } else {
1167 /* BB For even older servers we could convert time_buf
1168 into old DOS style which uses two second
1169 granularity */
1170
1171 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1172 &time_buf, cifs_sb->local_nls); */
1173 }
1174 }
e30dcf3a
SF		 1175 /* Even if error on time set, no sense failing the call if
1176 the server would set the time to a reasonable value anyway,
1177 and this check ensures that we are not being called from
1178 sys_utimes in which case we ought to fail the call back to
1179 the user when the server rejects the call */
1180 if((rc) && (attrs->ia_valid &&
1181 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1182 rc = 0;
1da177e4
LT		 1183 }
1184
1185 /* do not need local check to inode_check_ok since the server does
1186 that */
1187 if (!rc)
1188 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1189cifs_setattr_exit:
1da177e4
LT		 1190 kfree(full_path);
1191 FreeXid(xid);
1192 return rc;
1193}
1194
1195void cifs_delete_inode(struct inode *inode)
1196{
1197 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1198 /* may have to add back in if and when safe distributed caching of
1199 directories added e.g. via FindNotify */
1200}
Linux 6.x block layer and io_uring tree(s)