ia64/linux-2.6.18-xen.hg

view fs/cifs/inode.c @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 3e8752eb6d9c
children
line source
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"
33 int 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;
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,
47 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
48 CIFS_MOUNT_MAP_SPECIAL_CHR);
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,
67 cifs_sb->local_nls,
68 cifs_sb->mnt_cifs_flags &
69 CIFS_MOUNT_MAP_SPECIAL_CHR);
70 kfree(tmp_path);
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);
82 /* get new inode */
83 if (*pinode == NULL) {
84 *pinode = new_inode(sb);
85 if (*pinode == NULL)
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? */
90 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
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 }
97 inode = *pinode;
98 cifsInfo = CIFS_I(inode);
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);
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 /* since we set the inode type below we need to mask off
115 to avoid strange results if bits set above */
116 inode->i_mode &= ~S_IFMT;
117 if (type == UNIX_FILE) {
118 inode->i_mode |= S_IFREG;
119 } else if (type == UNIX_SYMLINK) {
120 inode->i_mode |= S_IFLNK;
121 } else if (type == UNIX_DIR) {
122 inode->i_mode |= S_IFDIR;
123 } else if (type == UNIX_CHARDEV) {
124 inode->i_mode |= S_IFCHR;
125 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
126 le64_to_cpu(findData.DevMinor) & MINORMASK);
127 } else if (type == UNIX_BLOCKDEV) {
128 inode->i_mode |= S_IFBLK;
129 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
130 le64_to_cpu(findData.DevMinor) & MINORMASK);
131 } else if (type == UNIX_FIFO) {
132 inode->i_mode |= S_IFIFO;
133 } else if (type == UNIX_SOCKET) {
134 inode->i_mode |= S_IFSOCK;
135 } else {
136 /* safest to call it a file if we do not know */
137 inode->i_mode |= S_IFREG;
138 cFYI(1,("unknown type %d",type));
139 }
140 inode->i_uid = le64_to_cpu(findData.Uid);
141 inode->i_gid = le64_to_cpu(findData.Gid);
142 inode->i_nlink = le64_to_cpu(findData.Nlinks);
144 if (is_size_safe_to_change(cifsInfo)) {
145 /* can not safely change the file size here if the
146 client is writing to it due to potential races */
148 i_size_write(inode, end_of_file);
150 /* blksize needs to be multiple of two. So safer to default to
151 blksize and blkbits set in superblock so 2**blkbits and blksize
152 will match rather than setting to:
153 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
155 /* This seems incredibly stupid but it turns out that i_blocks
156 is not related to (i_size / i_blksize), instead 512 byte size
157 is required for calculating num blocks */
159 /* 512 bytes (2**9) is the fake blocksize that must be used */
160 /* for this calculation */
161 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
162 }
164 if (num_of_bytes < end_of_file)
165 cFYI(1, ("allocation size less than end of file"));
166 cFYI(1, ("Size %ld and blocks %llu",
167 (unsigned long) inode->i_size,
168 (unsigned long long)inode->i_blocks));
169 if (S_ISREG(inode->i_mode)) {
170 cFYI(1, ("File inode"));
171 inode->i_op = &cifs_file_inode_ops;
172 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
173 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
174 inode->i_fop =
175 &cifs_file_direct_nobrl_ops;
176 else
177 inode->i_fop = &cifs_file_direct_ops;
178 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
179 inode->i_fop = &cifs_file_nobrl_ops;
180 else /* not direct, send byte range locks */
181 inode->i_fop = &cifs_file_ops;
183 /* check if server can support readpages */
184 if(pTcon->ses->server->maxBuf <
185 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
186 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
187 else
188 inode->i_data.a_ops = &cifs_addr_ops;
189 } else if (S_ISDIR(inode->i_mode)) {
190 cFYI(1, ("Directory inode"));
191 inode->i_op = &cifs_dir_inode_ops;
192 inode->i_fop = &cifs_dir_ops;
193 } else if (S_ISLNK(inode->i_mode)) {
194 cFYI(1, ("Symbolic Link inode"));
195 inode->i_op = &cifs_symlink_inode_ops;
196 /* tmp_inode->i_fop = */ /* do not need to set to anything */
197 } else {
198 cFYI(1, ("Init special inode"));
199 init_special_inode(inode, inode->i_mode,
200 inode->i_rdev);
201 }
202 }
203 return rc;
204 }
206 static int decode_sfu_inode(struct inode * inode, __u64 size,
207 const unsigned char *path,
208 struct cifs_sb_info *cifs_sb, int xid)
209 {
210 int rc;
211 int oplock = FALSE;
212 __u16 netfid;
213 struct cifsTconInfo *pTcon = cifs_sb->tcon;
214 char buf[24];
215 unsigned int bytes_read;
216 char * pbuf;
218 pbuf = buf;
220 if(size == 0) {
221 inode->i_mode |= S_IFIFO;
222 return 0;
223 } else if (size < 8) {
224 return -EINVAL; /* EOPNOTSUPP? */
225 }
227 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
228 CREATE_NOT_DIR, &netfid, &oplock, NULL,
229 cifs_sb->local_nls,
230 cifs_sb->mnt_cifs_flags &
231 CIFS_MOUNT_MAP_SPECIAL_CHR);
232 if (rc==0) {
233 int buf_type = CIFS_NO_BUFFER;
234 /* Read header */
235 rc = CIFSSMBRead(xid, pTcon,
236 netfid,
237 24 /* length */, 0 /* offset */,
238 &bytes_read, &pbuf, &buf_type);
239 if((rc == 0) && (bytes_read >= 8)) {
240 if(memcmp("IntxBLK", pbuf, 8) == 0) {
241 cFYI(1,("Block device"));
242 inode->i_mode |= S_IFBLK;
243 if(bytes_read == 24) {
244 /* we have enough to decode dev num */
245 __u64 mjr; /* major */
246 __u64 mnr; /* minor */
247 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
248 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
249 inode->i_rdev = MKDEV(mjr, mnr);
250 }
251 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
252 cFYI(1,("Char device"));
253 inode->i_mode |= S_IFCHR;
254 if(bytes_read == 24) {
255 /* we have enough to decode dev num */
256 __u64 mjr; /* major */
257 __u64 mnr; /* minor */
258 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
259 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
260 inode->i_rdev = MKDEV(mjr, mnr);
261 }
262 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
263 cFYI(1,("Symlink"));
264 inode->i_mode |= S_IFLNK;
265 } else {
266 inode->i_mode |= S_IFREG; /* file? */
267 rc = -EOPNOTSUPP;
268 }
269 } else {
270 inode->i_mode |= S_IFREG; /* then it is a file */
271 rc = -EOPNOTSUPP; /* or some unknown SFU type */
272 }
273 CIFSSMBClose(xid, pTcon, netfid);
274 }
275 return rc;
277 }
279 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
281 static int get_sfu_uid_mode(struct inode * inode,
282 const unsigned char *path,
283 struct cifs_sb_info *cifs_sb, int xid)
284 {
285 #ifdef CONFIG_CIFS_XATTR
286 ssize_t rc;
287 char ea_value[4];
288 __u32 mode;
290 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
291 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
292 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
293 if(rc < 0)
294 return (int)rc;
295 else if (rc > 3) {
296 mode = le32_to_cpu(*((__le32 *)ea_value));
297 inode->i_mode &= ~SFBITS_MASK;
298 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
299 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
300 cFYI(1,("special mode bits 0%o", mode));
301 return 0;
302 } else {
303 return 0;
304 }
305 #else
306 return -EOPNOTSUPP;
307 #endif
310 }
312 int cifs_get_inode_info(struct inode **pinode,
313 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
314 struct super_block *sb, int xid)
315 {
316 int rc = 0;
317 struct cifsTconInfo *pTcon;
318 struct inode *inode;
319 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
320 char *tmp_path;
321 char *buf = NULL;
323 pTcon = cifs_sb->tcon;
324 cFYI(1,("Getting info on %s", search_path));
326 if ((pfindData == NULL) && (*pinode != NULL)) {
327 if (CIFS_I(*pinode)->clientCanCacheRead) {
328 cFYI(1,("No need to revalidate cached inode sizes"));
329 return rc;
330 }
331 }
333 /* if file info not passed in then get it from server */
334 if (pfindData == NULL) {
335 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
336 if (buf == NULL)
337 return -ENOMEM;
338 pfindData = (FILE_ALL_INFO *)buf;
339 /* could do find first instead but this returns more info */
340 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
341 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
342 CIFS_MOUNT_MAP_SPECIAL_CHR);
343 /* BB optimize code so we do not make the above call
344 when server claims no NT SMB support and the above call
345 failed at least once - set flag in tcon or mount */
346 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
347 rc = SMBQueryInformation(xid, pTcon, search_path,
348 pfindData, cifs_sb->local_nls,
349 cifs_sb->mnt_cifs_flags &
350 CIFS_MOUNT_MAP_SPECIAL_CHR);
351 }
353 }
354 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
355 if (rc) {
356 if (rc == -EREMOTE) {
357 tmp_path =
358 kmalloc(strnlen
359 (pTcon->treeName,
360 MAX_TREE_SIZE + 1) +
361 strnlen(search_path, MAX_PATHCONF) + 1,
362 GFP_KERNEL);
363 if (tmp_path == NULL) {
364 kfree(buf);
365 return -ENOMEM;
366 }
368 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
369 strncat(tmp_path, search_path, MAX_PATHCONF);
370 rc = connect_to_dfs_path(xid, pTcon->ses,
371 /* treename + */ tmp_path,
372 cifs_sb->local_nls,
373 cifs_sb->mnt_cifs_flags &
374 CIFS_MOUNT_MAP_SPECIAL_CHR);
375 kfree(tmp_path);
376 /* BB fix up inode etc. */
377 } else if (rc) {
378 kfree(buf);
379 return rc;
380 }
381 } else {
382 struct cifsInodeInfo *cifsInfo;
383 __u32 attr = le32_to_cpu(pfindData->Attributes);
385 /* get new inode */
386 if (*pinode == NULL) {
387 *pinode = new_inode(sb);
388 if (*pinode == NULL)
389 return -ENOMEM;
390 /* Is an i_ino of zero legal? Can we use that to check
391 if the server supports returning inode numbers? Are
392 there other sanity checks we can use to ensure that
393 the server is really filling in that field? */
395 /* We can not use the IndexNumber field by default from
396 Windows or Samba (in ALL_INFO buf) but we can request
397 it explicitly. It may not be unique presumably if
398 the server has multiple devices mounted under one
399 share */
401 /* There may be higher info levels that work but are
402 there Windows server or network appliances for which
403 IndexNumber field is not guaranteed unique? */
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
406 int rc1 = 0;
407 __u64 inode_num;
409 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
410 search_path, &inode_num,
411 cifs_sb->local_nls,
412 cifs_sb->mnt_cifs_flags &
413 CIFS_MOUNT_MAP_SPECIAL_CHR);
414 if (rc1) {
415 cFYI(1,("GetSrvInodeNum rc %d", rc1));
416 /* BB EOPNOSUPP disable SERVER_INUM? */
417 } else /* do we need cast or hash to ino? */
418 (*pinode)->i_ino = inode_num;
419 } /* else ino incremented to unique num in new_inode*/
420 insert_inode_hash(*pinode);
421 }
422 inode = *pinode;
423 cifsInfo = CIFS_I(inode);
424 cifsInfo->cifsAttrs = attr;
425 cFYI(1, ("Old time %ld", cifsInfo->time));
426 cifsInfo->time = jiffies;
427 cFYI(1, ("New time %ld", cifsInfo->time));
429 /* blksize needs to be multiple of two. So safer to default to
430 blksize and blkbits set in superblock so 2**blkbits and blksize
431 will match rather than setting to:
432 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
434 /* Linux can not store file creation time so ignore it */
435 inode->i_atime =
436 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
437 inode->i_mtime =
438 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
439 inode->i_ctime =
440 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
441 cFYI(0, ("Attributes came in as 0x%x", attr));
443 /* set default mode. will override for dirs below */
444 if (atomic_read(&cifsInfo->inUse) == 0)
445 /* new inode, can safely set these fields */
446 inode->i_mode = cifs_sb->mnt_file_mode;
447 else /* since we set the inode type below we need to mask off
448 to avoid strange results if type changes and both get orred in */
449 inode->i_mode &= ~S_IFMT;
450 /* if (attr & ATTR_REPARSE) */
451 /* We no longer handle these as symlinks because we could not
452 follow them due to the absolute path with drive letter */
453 if (attr & ATTR_DIRECTORY) {
454 /* override default perms since we do not do byte range locking
455 on dirs */
456 inode->i_mode = cifs_sb->mnt_dir_mode;
457 inode->i_mode |= S_IFDIR;
458 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
459 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
460 /* No need to le64 convert size of zero */
461 (pfindData->EndOfFile == 0)) {
462 inode->i_mode = cifs_sb->mnt_file_mode;
463 inode->i_mode |= S_IFIFO;
464 /* BB Finish for SFU style symlinks and devices */
465 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
466 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
467 if (decode_sfu_inode(inode,
468 le64_to_cpu(pfindData->EndOfFile),
469 search_path,
470 cifs_sb, xid)) {
471 cFYI(1,("Unrecognized sfu inode type"));
472 }
473 cFYI(1,("sfu mode 0%o",inode->i_mode));
474 } else {
475 inode->i_mode |= S_IFREG;
476 /* treat the dos attribute of read-only as read-only
477 mode e.g. 555 */
478 if (cifsInfo->cifsAttrs & ATTR_READONLY)
479 inode->i_mode &= ~(S_IWUGO);
480 /* BB add code here -
481 validate if device or weird share or device type? */
482 }
483 if (is_size_safe_to_change(cifsInfo)) {
484 /* can not safely change the file size here if the
485 client is writing to it due to potential races */
486 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
488 /* 512 bytes (2**9) is the fake blocksize that must be
489 used for this calculation */
490 inode->i_blocks = (512 - 1 + le64_to_cpu(
491 pfindData->AllocationSize)) >> 9;
492 }
494 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
496 /* BB fill in uid and gid here? with help from winbind?
497 or retrieve from NTFS stream extended attribute */
498 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
499 /* fill in uid, gid, mode from server ACL */
500 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
501 } else if (atomic_read(&cifsInfo->inUse) == 0) {
502 inode->i_uid = cifs_sb->mnt_uid;
503 inode->i_gid = cifs_sb->mnt_gid;
504 /* set so we do not keep refreshing these fields with
505 bad data after user has changed them in memory */
506 atomic_set(&cifsInfo->inUse,1);
507 }
509 if (S_ISREG(inode->i_mode)) {
510 cFYI(1, ("File inode"));
511 inode->i_op = &cifs_file_inode_ops;
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
513 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
514 inode->i_fop =
515 &cifs_file_direct_nobrl_ops;
516 else
517 inode->i_fop = &cifs_file_direct_ops;
518 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
519 inode->i_fop = &cifs_file_nobrl_ops;
520 else /* not direct, send byte range locks */
521 inode->i_fop = &cifs_file_ops;
523 if(pTcon->ses->server->maxBuf <
524 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
526 else
527 inode->i_data.a_ops = &cifs_addr_ops;
528 } else if (S_ISDIR(inode->i_mode)) {
529 cFYI(1, ("Directory inode"));
530 inode->i_op = &cifs_dir_inode_ops;
531 inode->i_fop = &cifs_dir_ops;
532 } else if (S_ISLNK(inode->i_mode)) {
533 cFYI(1, ("Symbolic Link inode"));
534 inode->i_op = &cifs_symlink_inode_ops;
535 } else {
536 init_special_inode(inode, inode->i_mode,
537 inode->i_rdev);
538 }
539 }
540 kfree(buf);
541 return rc;
542 }
544 /* gets root inode */
545 void cifs_read_inode(struct inode *inode)
546 {
547 int xid;
548 struct cifs_sb_info *cifs_sb;
550 cifs_sb = CIFS_SB(inode->i_sb);
551 xid = GetXid();
552 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
553 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
554 else
555 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
556 /* can not call macro FreeXid here since in a void func */
557 _FreeXid(xid);
558 }
560 int cifs_unlink(struct inode *inode, struct dentry *direntry)
561 {
562 int rc = 0;
563 int xid;
564 struct cifs_sb_info *cifs_sb;
565 struct cifsTconInfo *pTcon;
566 char *full_path = NULL;
567 struct cifsInodeInfo *cifsInode;
568 FILE_BASIC_INFO *pinfo_buf;
570 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
572 xid = GetXid();
574 if(inode)
575 cifs_sb = CIFS_SB(inode->i_sb);
576 else
577 cifs_sb = CIFS_SB(direntry->d_sb);
578 pTcon = cifs_sb->tcon;
580 /* Unlink can be called from rename so we can not grab the sem here
581 since we deadlock otherwise */
582 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
583 full_path = build_path_from_dentry(direntry);
584 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
585 if (full_path == NULL) {
586 FreeXid(xid);
587 return -ENOMEM;
588 }
589 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
590 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
592 if (!rc) {
593 if (direntry->d_inode)
594 direntry->d_inode->i_nlink--;
595 } else if (rc == -ENOENT) {
596 d_drop(direntry);
597 } else if (rc == -ETXTBSY) {
598 int oplock = FALSE;
599 __u16 netfid;
601 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
602 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
603 &netfid, &oplock, NULL, cifs_sb->local_nls,
604 cifs_sb->mnt_cifs_flags &
605 CIFS_MOUNT_MAP_SPECIAL_CHR);
606 if (rc==0) {
607 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
608 cifs_sb->local_nls,
609 cifs_sb->mnt_cifs_flags &
610 CIFS_MOUNT_MAP_SPECIAL_CHR);
611 CIFSSMBClose(xid, pTcon, netfid);
612 if (direntry->d_inode)
613 direntry->d_inode->i_nlink--;
614 }
615 } else if (rc == -EACCES) {
616 /* try only if r/o attribute set in local lookup data? */
617 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
618 if (pinfo_buf) {
619 /* ATTRS set to normal clears r/o bit */
620 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
621 if (!(pTcon->ses->flags & CIFS_SES_NT4))
622 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
623 pinfo_buf,
624 cifs_sb->local_nls,
625 cifs_sb->mnt_cifs_flags &
626 CIFS_MOUNT_MAP_SPECIAL_CHR);
627 else
628 rc = -EOPNOTSUPP;
630 if (rc == -EOPNOTSUPP) {
631 int oplock = FALSE;
632 __u16 netfid;
633 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
634 full_path,
635 (__u16)ATTR_NORMAL,
636 cifs_sb->local_nls);
637 For some strange reason it seems that NT4 eats the
638 old setattr call without actually setting the
639 attributes so on to the third attempted workaround
640 */
642 /* BB could scan to see if we already have it open
643 and pass in pid of opener to function */
644 rc = CIFSSMBOpen(xid, pTcon, full_path,
645 FILE_OPEN, SYNCHRONIZE |
646 FILE_WRITE_ATTRIBUTES, 0,
647 &netfid, &oplock, NULL,
648 cifs_sb->local_nls,
649 cifs_sb->mnt_cifs_flags &
650 CIFS_MOUNT_MAP_SPECIAL_CHR);
651 if (rc==0) {
652 rc = CIFSSMBSetFileTimes(xid, pTcon,
653 pinfo_buf,
654 netfid);
655 CIFSSMBClose(xid, pTcon, netfid);
656 }
657 }
658 kfree(pinfo_buf);
659 }
660 if (rc==0) {
661 rc = CIFSSMBDelFile(xid, pTcon, full_path,
662 cifs_sb->local_nls,
663 cifs_sb->mnt_cifs_flags &
664 CIFS_MOUNT_MAP_SPECIAL_CHR);
665 if (!rc) {
666 if (direntry->d_inode)
667 direntry->d_inode->i_nlink--;
668 } else if (rc == -ETXTBSY) {
669 int oplock = FALSE;
670 __u16 netfid;
672 rc = CIFSSMBOpen(xid, pTcon, full_path,
673 FILE_OPEN, DELETE,
674 CREATE_NOT_DIR |
675 CREATE_DELETE_ON_CLOSE,
676 &netfid, &oplock, NULL,
677 cifs_sb->local_nls,
678 cifs_sb->mnt_cifs_flags &
679 CIFS_MOUNT_MAP_SPECIAL_CHR);
680 if (rc==0) {
681 CIFSSMBRenameOpenFile(xid, pTcon,
682 netfid, NULL,
683 cifs_sb->local_nls,
684 cifs_sb->mnt_cifs_flags &
685 CIFS_MOUNT_MAP_SPECIAL_CHR);
686 CIFSSMBClose(xid, pTcon, netfid);
687 if (direntry->d_inode)
688 direntry->d_inode->i_nlink--;
689 }
690 /* BB if rc = -ETXTBUSY goto the rename logic BB */
691 }
692 }
693 }
694 if (direntry->d_inode) {
695 cifsInode = CIFS_I(direntry->d_inode);
696 cifsInode->time = 0; /* will force revalidate to get info
697 when needed */
698 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
699 }
700 if(inode) {
701 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
702 cifsInode = CIFS_I(inode);
703 cifsInode->time = 0; /* force revalidate of dir as well */
704 }
706 kfree(full_path);
707 FreeXid(xid);
708 return rc;
709 }
711 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
712 {
713 int rc = 0;
714 int xid;
715 struct cifs_sb_info *cifs_sb;
716 struct cifsTconInfo *pTcon;
717 char *full_path = NULL;
718 struct inode *newinode = NULL;
720 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
722 xid = GetXid();
724 cifs_sb = CIFS_SB(inode->i_sb);
725 pTcon = cifs_sb->tcon;
727 full_path = build_path_from_dentry(direntry);
728 if (full_path == NULL) {
729 FreeXid(xid);
730 return -ENOMEM;
731 }
732 /* BB add setting the equivalent of mode via CreateX w/ACLs */
733 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
734 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
735 if (rc) {
736 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
737 d_drop(direntry);
738 } else {
739 inode->i_nlink++;
740 if (pTcon->ses->capabilities & CAP_UNIX)
741 rc = cifs_get_inode_info_unix(&newinode, full_path,
742 inode->i_sb,xid);
743 else
744 rc = cifs_get_inode_info(&newinode, full_path, NULL,
745 inode->i_sb,xid);
747 if (pTcon->nocase)
748 direntry->d_op = &cifs_ci_dentry_ops;
749 else
750 direntry->d_op = &cifs_dentry_ops;
751 d_instantiate(direntry, newinode);
752 if (direntry->d_inode)
753 direntry->d_inode->i_nlink = 2;
754 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
755 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
756 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
757 mode,
758 (__u64)current->fsuid,
759 (__u64)current->fsgid,
760 0 /* dev_t */,
761 cifs_sb->local_nls,
762 cifs_sb->mnt_cifs_flags &
763 CIFS_MOUNT_MAP_SPECIAL_CHR);
764 } else {
765 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
766 mode, (__u64)-1,
767 (__u64)-1, 0 /* dev_t */,
768 cifs_sb->local_nls,
769 cifs_sb->mnt_cifs_flags &
770 CIFS_MOUNT_MAP_SPECIAL_CHR);
771 }
772 else {
773 /* BB to be implemented via Windows secrty descriptors
774 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
775 -1, -1, local_nls); */
776 if(direntry->d_inode) {
777 direntry->d_inode->i_mode = mode;
778 direntry->d_inode->i_mode |= S_IFDIR;
779 if(cifs_sb->mnt_cifs_flags &
780 CIFS_MOUNT_SET_UID) {
781 direntry->d_inode->i_uid =
782 current->fsuid;
783 direntry->d_inode->i_gid =
784 current->fsgid;
785 }
786 }
787 }
788 }
789 kfree(full_path);
790 FreeXid(xid);
791 return rc;
792 }
794 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
795 {
796 int rc = 0;
797 int xid;
798 struct cifs_sb_info *cifs_sb;
799 struct cifsTconInfo *pTcon;
800 char *full_path = NULL;
801 struct cifsInodeInfo *cifsInode;
803 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
805 xid = GetXid();
807 cifs_sb = CIFS_SB(inode->i_sb);
808 pTcon = cifs_sb->tcon;
810 full_path = build_path_from_dentry(direntry);
811 if (full_path == NULL) {
812 FreeXid(xid);
813 return -ENOMEM;
814 }
816 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
817 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
819 if (!rc) {
820 inode->i_nlink--;
821 i_size_write(direntry->d_inode,0);
822 direntry->d_inode->i_nlink = 0;
823 }
825 cifsInode = CIFS_I(direntry->d_inode);
826 cifsInode->time = 0; /* force revalidate to go get info when
827 needed */
828 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
829 current_fs_time(inode->i_sb);
831 kfree(full_path);
832 FreeXid(xid);
833 return rc;
834 }
836 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
837 struct inode *target_inode, struct dentry *target_direntry)
838 {
839 char *fromName;
840 char *toName;
841 struct cifs_sb_info *cifs_sb_source;
842 struct cifs_sb_info *cifs_sb_target;
843 struct cifsTconInfo *pTcon;
844 int xid;
845 int rc = 0;
847 xid = GetXid();
849 cifs_sb_target = CIFS_SB(target_inode->i_sb);
850 cifs_sb_source = CIFS_SB(source_inode->i_sb);
851 pTcon = cifs_sb_source->tcon;
853 if (pTcon != cifs_sb_target->tcon) {
854 FreeXid(xid);
855 return -EXDEV; /* BB actually could be allowed if same server,
856 but different share.
857 Might eventually add support for this */
858 }
860 /* we already have the rename sem so we do not need to grab it again
861 here to protect the path integrity */
862 fromName = build_path_from_dentry(source_direntry);
863 toName = build_path_from_dentry(target_direntry);
864 if ((fromName == NULL) || (toName == NULL)) {
865 rc = -ENOMEM;
866 goto cifs_rename_exit;
867 }
869 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
870 cifs_sb_source->local_nls,
871 cifs_sb_source->mnt_cifs_flags &
872 CIFS_MOUNT_MAP_SPECIAL_CHR);
873 if (rc == -EEXIST) {
874 /* check if they are the same file because rename of hardlinked
875 files is a noop */
876 FILE_UNIX_BASIC_INFO *info_buf_source;
877 FILE_UNIX_BASIC_INFO *info_buf_target;
879 info_buf_source =
880 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
881 if (info_buf_source != NULL) {
882 info_buf_target = info_buf_source + 1;
883 if (pTcon->ses->capabilities & CAP_UNIX)
884 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
885 info_buf_source,
886 cifs_sb_source->local_nls,
887 cifs_sb_source->mnt_cifs_flags &
888 CIFS_MOUNT_MAP_SPECIAL_CHR);
889 /* else rc is still EEXIST so will fall through to
890 unlink the target and retry rename */
891 if (rc == 0) {
892 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
893 info_buf_target,
894 cifs_sb_target->local_nls,
895 /* remap based on source sb */
896 cifs_sb_source->mnt_cifs_flags &
897 CIFS_MOUNT_MAP_SPECIAL_CHR);
898 }
899 if ((rc == 0) &&
900 (info_buf_source->UniqueId ==
901 info_buf_target->UniqueId)) {
902 /* do not rename since the files are hardlinked which
903 is a noop */
904 } else {
905 /* we either can not tell the files are hardlinked
906 (as with Windows servers) or files are not
907 hardlinked so delete the target manually before
908 renaming to follow POSIX rather than Windows
909 semantics */
910 cifs_unlink(target_inode, target_direntry);
911 rc = CIFSSMBRename(xid, pTcon, fromName,
912 toName,
913 cifs_sb_source->local_nls,
914 cifs_sb_source->mnt_cifs_flags
915 & CIFS_MOUNT_MAP_SPECIAL_CHR);
916 }
917 kfree(info_buf_source);
918 } /* if we can not get memory just leave rc as EEXIST */
919 }
921 if (rc) {
922 cFYI(1, ("rename rc %d", rc));
923 }
925 if ((rc == -EIO) || (rc == -EEXIST)) {
926 int oplock = FALSE;
927 __u16 netfid;
929 /* BB FIXME Is Generic Read correct for rename? */
930 /* if renaming directory - we should not say CREATE_NOT_DIR,
931 need to test renaming open directory, also GENERIC_READ
932 might not right be right access to request */
933 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
934 CREATE_NOT_DIR, &netfid, &oplock, NULL,
935 cifs_sb_source->local_nls,
936 cifs_sb_source->mnt_cifs_flags &
937 CIFS_MOUNT_MAP_SPECIAL_CHR);
938 if (rc==0) {
939 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
940 cifs_sb_source->local_nls,
941 cifs_sb_source->mnt_cifs_flags &
942 CIFS_MOUNT_MAP_SPECIAL_CHR);
943 CIFSSMBClose(xid, pTcon, netfid);
944 }
945 }
947 cifs_rename_exit:
948 kfree(fromName);
949 kfree(toName);
950 FreeXid(xid);
951 return rc;
952 }
954 int cifs_revalidate(struct dentry *direntry)
955 {
956 int xid;
957 int rc = 0;
958 char *full_path;
959 struct cifs_sb_info *cifs_sb;
960 struct cifsInodeInfo *cifsInode;
961 loff_t local_size;
962 struct timespec local_mtime;
963 int invalidate_inode = FALSE;
965 if (direntry->d_inode == NULL)
966 return -ENOENT;
968 cifsInode = CIFS_I(direntry->d_inode);
970 if (cifsInode == NULL)
971 return -ENOENT;
973 /* no sense revalidating inode info on file that no one can write */
974 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
975 return rc;
977 xid = GetXid();
979 cifs_sb = CIFS_SB(direntry->d_sb);
981 /* can not safely grab the rename sem here if rename calls revalidate
982 since that would deadlock */
983 full_path = build_path_from_dentry(direntry);
984 if (full_path == NULL) {
985 FreeXid(xid);
986 return -ENOMEM;
987 }
988 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
989 "jiffies %ld", full_path, direntry->d_inode,
990 direntry->d_inode->i_count.counter, direntry,
991 direntry->d_time, jiffies));
993 if (cifsInode->time == 0) {
994 /* was set to zero previously to force revalidate */
995 } else if (time_before(jiffies, cifsInode->time + HZ) &&
996 lookupCacheEnabled) {
997 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
998 (direntry->d_inode->i_nlink == 1)) {
999 kfree(full_path);
1000 FreeXid(xid);
1001 return rc;
1002 } else {
1003 cFYI(1, ("Have to revalidate file due to hardlinks"));
1007 /* save mtime and size */
1008 local_mtime = direntry->d_inode->i_mtime;
1009 local_size = direntry->d_inode->i_size;
1011 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1012 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1013 direntry->d_sb,xid);
1014 if (rc) {
1015 cFYI(1, ("error on getting revalidate info %d", rc));
1016 /* if (rc != -ENOENT)
1017 rc = 0; */ /* BB should we cache info on
1018 certain errors? */
1020 } else {
1021 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1022 direntry->d_sb,xid);
1023 if (rc) {
1024 cFYI(1, ("error on getting revalidate info %d", rc));
1025 /* if (rc != -ENOENT)
1026 rc = 0; */ /* BB should we cache info on
1027 certain errors? */
1030 /* should we remap certain errors, access denied?, to zero */
1032 /* if not oplocked, we invalidate inode pages if mtime or file size
1033 had changed on server */
1035 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1036 (local_size == direntry->d_inode->i_size)) {
1037 cFYI(1, ("cifs_revalidate - inode unchanged"));
1038 } else {
1039 /* file may have changed on server */
1040 if (cifsInode->clientCanCacheRead) {
1041 /* no need to invalidate inode pages since we were the
1042 only ones who could have modified the file and the
1043 server copy is staler than ours */
1044 } else {
1045 invalidate_inode = TRUE;
1049 /* can not grab this sem since kernel filesys locking documentation
1050 indicates i_mutex may be taken by the kernel on lookup and rename
1051 which could deadlock if we grab the i_mutex here as well */
1052 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1053 /* need to write out dirty pages here */
1054 if (direntry->d_inode->i_mapping) {
1055 /* do we need to lock inode until after invalidate completes
1056 below? */
1057 filemap_fdatawrite(direntry->d_inode->i_mapping);
1059 if (invalidate_inode) {
1060 /* shrink_dcache not necessary now that cifs dentry ops
1061 are exported for negative dentries */
1062 /* if(S_ISDIR(direntry->d_inode->i_mode))
1063 shrink_dcache_parent(direntry); */
1064 if (S_ISREG(direntry->d_inode->i_mode)) {
1065 if (direntry->d_inode->i_mapping)
1066 filemap_fdatawait(direntry->d_inode->i_mapping);
1067 /* may eventually have to do this for open files too */
1068 if (list_empty(&(cifsInode->openFileList))) {
1069 /* changed on server - flush read ahead pages */
1070 cFYI(1, ("Invalidating read ahead data on "
1071 "closed file"));
1072 invalidate_remote_inode(direntry->d_inode);
1076 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1078 kfree(full_path);
1079 FreeXid(xid);
1080 return rc;
1083 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1084 struct kstat *stat)
1086 int err = cifs_revalidate(dentry);
1087 if (!err)
1088 generic_fillattr(dentry->d_inode, stat);
1089 return err;
1092 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1094 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1095 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1096 struct page *page;
1097 char *kaddr;
1098 int rc = 0;
1100 page = grab_cache_page(mapping, index);
1101 if (!page)
1102 return -ENOMEM;
1104 kaddr = kmap_atomic(page, KM_USER0);
1105 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1106 flush_dcache_page(page);
1107 kunmap_atomic(kaddr, KM_USER0);
1108 unlock_page(page);
1109 page_cache_release(page);
1110 return rc;
1113 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1115 int xid;
1116 struct cifs_sb_info *cifs_sb;
1117 struct cifsTconInfo *pTcon;
1118 char *full_path = NULL;
1119 int rc = -EACCES;
1120 struct cifsFileInfo *open_file = NULL;
1121 FILE_BASIC_INFO time_buf;
1122 int set_time = FALSE;
1123 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1124 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1125 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1126 struct cifsInodeInfo *cifsInode;
1128 xid = GetXid();
1130 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1131 direntry->d_name.name, attrs->ia_valid));
1133 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1134 pTcon = cifs_sb->tcon;
1136 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1137 /* check if we have permission to change attrs */
1138 rc = inode_change_ok(direntry->d_inode, attrs);
1139 if(rc < 0) {
1140 FreeXid(xid);
1141 return rc;
1142 } else
1143 rc = 0;
1146 full_path = build_path_from_dentry(direntry);
1147 if (full_path == NULL) {
1148 FreeXid(xid);
1149 return -ENOMEM;
1151 cifsInode = CIFS_I(direntry->d_inode);
1153 /* BB check if we need to refresh inode from server now ? BB */
1155 /* need to flush data before changing file size on server */
1156 filemap_write_and_wait(direntry->d_inode->i_mapping);
1158 if (attrs->ia_valid & ATTR_SIZE) {
1159 /* To avoid spurious oplock breaks from server, in the case of
1160 inodes that we already have open, avoid doing path based
1161 setting of file size if we can do it by handle.
1162 This keeps our caching token (oplock) and avoids timeouts
1163 when the local oplock break takes longer to flush
1164 writebehind data than the SMB timeout for the SetPathInfo
1165 request would allow */
1167 open_file = find_writable_file(cifsInode);
1168 if (open_file) {
1169 __u16 nfid = open_file->netfid;
1170 __u32 npid = open_file->pid;
1171 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1172 nfid, npid, FALSE);
1173 atomic_dec(&open_file->wrtPending);
1174 cFYI(1,("SetFSize for attrs rc = %d", rc));
1175 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1176 int bytes_written;
1177 rc = CIFSSMBWrite(xid, pTcon,
1178 nfid, 0, attrs->ia_size,
1179 &bytes_written, NULL, NULL,
1180 1 /* 45 seconds */);
1181 cFYI(1,("Wrt seteof rc %d", rc));
1183 } else
1184 rc = -EINVAL;
1186 if (rc != 0) {
1187 /* Set file size by pathname rather than by handle
1188 either because no valid, writeable file handle for
1189 it was found or because there was an error setting
1190 it by handle */
1191 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1192 attrs->ia_size, FALSE,
1193 cifs_sb->local_nls,
1194 cifs_sb->mnt_cifs_flags &
1195 CIFS_MOUNT_MAP_SPECIAL_CHR);
1196 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1197 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1198 __u16 netfid;
1199 int oplock = FALSE;
1201 rc = SMBLegacyOpen(xid, pTcon, full_path,
1202 FILE_OPEN,
1203 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1204 CREATE_NOT_DIR, &netfid, &oplock,
1205 NULL, cifs_sb->local_nls,
1206 cifs_sb->mnt_cifs_flags &
1207 CIFS_MOUNT_MAP_SPECIAL_CHR);
1208 if (rc==0) {
1209 int bytes_written;
1210 rc = CIFSSMBWrite(xid, pTcon,
1211 netfid, 0,
1212 attrs->ia_size,
1213 &bytes_written, NULL,
1214 NULL, 1 /* 45 sec */);
1215 cFYI(1,("wrt seteof rc %d",rc));
1216 CIFSSMBClose(xid, pTcon, netfid);
1222 /* Server is ok setting allocation size implicitly - no need
1223 to call:
1224 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1225 cifs_sb->local_nls);
1226 */
1228 if (rc == 0) {
1229 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1230 cifs_truncate_page(direntry->d_inode->i_mapping,
1231 direntry->d_inode->i_size);
1232 } else
1233 goto cifs_setattr_exit;
1235 if (attrs->ia_valid & ATTR_UID) {
1236 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1237 uid = attrs->ia_uid;
1239 if (attrs->ia_valid & ATTR_GID) {
1240 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1241 gid = attrs->ia_gid;
1244 time_buf.Attributes = 0;
1245 if (attrs->ia_valid & ATTR_MODE) {
1246 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1247 mode = attrs->ia_mode;
1250 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1251 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1252 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1253 0 /* dev_t */, cifs_sb->local_nls,
1254 cifs_sb->mnt_cifs_flags &
1255 CIFS_MOUNT_MAP_SPECIAL_CHR);
1256 else if (attrs->ia_valid & ATTR_MODE) {
1257 rc = 0;
1258 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1259 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1260 time_buf.Attributes =
1261 cpu_to_le32(cifsInode->cifsAttrs |
1262 ATTR_READONLY);
1263 } else if ((mode & S_IWUGO) == S_IWUGO) {
1264 if (cifsInode->cifsAttrs & ATTR_READONLY)
1265 time_buf.Attributes =
1266 cpu_to_le32(cifsInode->cifsAttrs &
1267 (~ATTR_READONLY));
1269 /* BB to be implemented -
1270 via Windows security descriptors or streams */
1271 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1272 cifs_sb->local_nls); */
1275 if (attrs->ia_valid & ATTR_ATIME) {
1276 set_time = TRUE;
1277 time_buf.LastAccessTime =
1278 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1279 } else
1280 time_buf.LastAccessTime = 0;
1282 if (attrs->ia_valid & ATTR_MTIME) {
1283 set_time = TRUE;
1284 time_buf.LastWriteTime =
1285 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1286 } else
1287 time_buf.LastWriteTime = 0;
1288 /* Do not set ctime explicitly unless other time
1289 stamps are changed explicitly (i.e. by utime()
1290 since we would then have a mix of client and
1291 server times */
1293 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1294 set_time = TRUE;
1295 /* Although Samba throws this field away
1296 it may be useful to Windows - but we do
1297 not want to set ctime unless some other
1298 timestamp is changing */
1299 cFYI(1, ("CIFS - CTIME changed"));
1300 time_buf.ChangeTime =
1301 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1302 } else
1303 time_buf.ChangeTime = 0;
1305 if (set_time || time_buf.Attributes) {
1306 time_buf.CreationTime = 0; /* do not change */
1307 /* In the future we should experiment - try setting timestamps
1308 via Handle (SetFileInfo) instead of by path */
1309 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1310 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1311 cifs_sb->local_nls,
1312 cifs_sb->mnt_cifs_flags &
1313 CIFS_MOUNT_MAP_SPECIAL_CHR);
1314 else
1315 rc = -EOPNOTSUPP;
1317 if (rc == -EOPNOTSUPP) {
1318 int oplock = FALSE;
1319 __u16 netfid;
1321 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1322 "times not supported by this server"));
1323 /* BB we could scan to see if we already have it open
1324 and pass in pid of opener to function */
1325 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1326 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1327 CREATE_NOT_DIR, &netfid, &oplock,
1328 NULL, cifs_sb->local_nls,
1329 cifs_sb->mnt_cifs_flags &
1330 CIFS_MOUNT_MAP_SPECIAL_CHR);
1331 if (rc==0) {
1332 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1333 netfid);
1334 CIFSSMBClose(xid, pTcon, netfid);
1335 } else {
1336 /* BB For even older servers we could convert time_buf
1337 into old DOS style which uses two second
1338 granularity */
1340 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1341 &time_buf, cifs_sb->local_nls); */
1344 /* Even if error on time set, no sense failing the call if
1345 the server would set the time to a reasonable value anyway,
1346 and this check ensures that we are not being called from
1347 sys_utimes in which case we ought to fail the call back to
1348 the user when the server rejects the call */
1349 if((rc) && (attrs->ia_valid &&
1350 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1351 rc = 0;
1354 /* do not need local check to inode_check_ok since the server does
1355 that */
1356 if (!rc)
1357 rc = inode_setattr(direntry->d_inode, attrs);
1358 cifs_setattr_exit:
1359 kfree(full_path);
1360 FreeXid(xid);
1361 return rc;
1364 void cifs_delete_inode(struct inode *inode)
1366 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1367 /* may have to add back in if and when safe distributed caching of
1368 directories added e.g. via FindNotify */