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[NETFILTER]: H.323 helper: make get_h245_addr() static
[linux-2.6/verdex.git] / fs / cifs / inode.c
blob957ddd1571c6f0d72e99b053ded08fd14e551b43
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
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;
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,
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);
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);
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 }
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 /* 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);
143
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 */
147
148 i_size_write(inode, end_of_file);
149
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;*/
154
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 */
158
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 }
163
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;
182
183 inode->i_data.a_ops = &cifs_addr_ops;
184 /* check if server can support readpages */
185 if(pTcon->ses->server->maxBuf <
186 4096 + MAX_CIFS_HDR_SIZE)
187 inode->i_data.a_ops->readpages = NULL;
188 } else if (S_ISDIR(inode->i_mode)) {
189 cFYI(1, ("Directory inode"));
190 inode->i_op = &cifs_dir_inode_ops;
191 inode->i_fop = &cifs_dir_ops;
192 } else if (S_ISLNK(inode->i_mode)) {
193 cFYI(1, ("Symbolic Link inode"));
194 inode->i_op = &cifs_symlink_inode_ops;
195 /* tmp_inode->i_fop = */ /* do not need to set to anything */
196 } else {
197 cFYI(1, ("Init special inode"));
198 init_special_inode(inode, inode->i_mode,
199 inode->i_rdev);
200 }
201 }
202 return rc;
203 }
204
205 static int decode_sfu_inode(struct inode * inode, __u64 size,
206 const unsigned char *path,
207 struct cifs_sb_info *cifs_sb, int xid)
208 {
209 int rc;
210 int oplock = FALSE;
211 __u16 netfid;
212 struct cifsTconInfo *pTcon = cifs_sb->tcon;
213 char buf[24];
214 unsigned int bytes_read;
215 char * pbuf;
216
217 pbuf = buf;
218
219 if(size == 0) {
220 inode->i_mode |= S_IFIFO;
221 return 0;
222 } else if (size < 8) {
223 return -EINVAL; /* EOPNOTSUPP? */
224 }
225
226 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
227 CREATE_NOT_DIR, &netfid, &oplock, NULL,
228 cifs_sb->local_nls,
229 cifs_sb->mnt_cifs_flags &
230 CIFS_MOUNT_MAP_SPECIAL_CHR);
231 if (rc==0) {
232 int buf_type = CIFS_NO_BUFFER;
233 /* Read header */
234 rc = CIFSSMBRead(xid, pTcon,
235 netfid,
236 24 /* length */, 0 /* offset */,
237 &bytes_read, &pbuf, &buf_type);
238 if((rc == 0) && (bytes_read >= 8)) {
239 if(memcmp("IntxBLK", pbuf, 8) == 0) {
240 cFYI(1,("Block device"));
241 inode->i_mode |= S_IFBLK;
242 if(bytes_read == 24) {
243 /* we have enough to decode dev num */
244 __u64 mjr; /* major */
245 __u64 mnr; /* minor */
246 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
247 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
248 inode->i_rdev = MKDEV(mjr, mnr);
249 }
250 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
251 cFYI(1,("Char device"));
252 inode->i_mode |= S_IFCHR;
253 if(bytes_read == 24) {
254 /* we have enough to decode dev num */
255 __u64 mjr; /* major */
256 __u64 mnr; /* minor */
257 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
258 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
259 inode->i_rdev = MKDEV(mjr, mnr);
260 }
261 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
262 cFYI(1,("Symlink"));
263 inode->i_mode |= S_IFLNK;
264 } else {
265 inode->i_mode |= S_IFREG; /* file? */
266 rc = -EOPNOTSUPP;
267 }
268 } else {
269 inode->i_mode |= S_IFREG; /* then it is a file */
270 rc = -EOPNOTSUPP; /* or some unknown SFU type */
271 }
272 CIFSSMBClose(xid, pTcon, netfid);
273 }
274 return rc;
275
276 }
277
278 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
279
280 static int get_sfu_uid_mode(struct inode * inode,
281 const unsigned char *path,
282 struct cifs_sb_info *cifs_sb, int xid)
283 {
284 #ifdef CONFIG_CIFS_XATTR
285 ssize_t rc;
286 char ea_value[4];
287 __u32 mode;
288
289 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
290 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
291 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
292 if(rc < 0)
293 return (int)rc;
294 else if (rc > 3) {
295 mode = le32_to_cpu(*((__le32 *)ea_value));
296 inode->i_mode &= ~SFBITS_MASK;
297 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
298 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
299 cFYI(1,("special mode bits 0%o", mode));
300 return 0;
301 } else {
302 return 0;
303 }
304 #else
305 return -EOPNOTSUPP;
306 #endif
307
308
309 }
310
311 int cifs_get_inode_info(struct inode **pinode,
312 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
313 struct super_block *sb, int xid)
314 {
315 int rc = 0;
316 struct cifsTconInfo *pTcon;
317 struct inode *inode;
318 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
319 char *tmp_path;
320 char *buf = NULL;
321
322 pTcon = cifs_sb->tcon;
323 cFYI(1,("Getting info on %s", search_path));
324
325 if ((pfindData == NULL) && (*pinode != NULL)) {
326 if (CIFS_I(*pinode)->clientCanCacheRead) {
327 cFYI(1,("No need to revalidate cached inode sizes"));
328 return rc;
329 }
330 }
331
332 /* if file info not passed in then get it from server */
333 if (pfindData == NULL) {
334 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
335 if (buf == NULL)
336 return -ENOMEM;
337 pfindData = (FILE_ALL_INFO *)buf;
338 /* could do find first instead but this returns more info */
339 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
340 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
341 CIFS_MOUNT_MAP_SPECIAL_CHR);
342 /* BB optimize code so we do not make the above call
343 when server claims no NT SMB support and the above call
344 failed at least once - set flag in tcon or mount */
345 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
346 rc = SMBQueryInformation(xid, pTcon, search_path,
347 pfindData, cifs_sb->local_nls,
348 cifs_sb->mnt_cifs_flags &
349 CIFS_MOUNT_MAP_SPECIAL_CHR);
350 }
351
352 }
353 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
354 if (rc) {
355 if (rc == -EREMOTE) {
356 tmp_path =
357 kmalloc(strnlen
358 (pTcon->treeName,
359 MAX_TREE_SIZE + 1) +
360 strnlen(search_path, MAX_PATHCONF) + 1,
361 GFP_KERNEL);
362 if (tmp_path == NULL) {
363 kfree(buf);
364 return -ENOMEM;
365 }
366
367 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
368 strncat(tmp_path, search_path, MAX_PATHCONF);
369 rc = connect_to_dfs_path(xid, pTcon->ses,
370 /* treename + */ tmp_path,
371 cifs_sb->local_nls,
372 cifs_sb->mnt_cifs_flags &
373 CIFS_MOUNT_MAP_SPECIAL_CHR);
374 kfree(tmp_path);
375 /* BB fix up inode etc. */
376 } else if (rc) {
377 kfree(buf);
378 return rc;
379 }
380 } else {
381 struct cifsInodeInfo *cifsInfo;
382 __u32 attr = le32_to_cpu(pfindData->Attributes);
383
384 /* get new inode */
385 if (*pinode == NULL) {
386 *pinode = new_inode(sb);
387 if (*pinode == NULL)
388 return -ENOMEM;
389 /* Is an i_ino of zero legal? Can we use that to check
390 if the server supports returning inode numbers? Are
391 there other sanity checks we can use to ensure that
392 the server is really filling in that field? */
393
394 /* We can not use the IndexNumber field by default from
395 Windows or Samba (in ALL_INFO buf) but we can request
396 it explicitly. It may not be unique presumably if
397 the server has multiple devices mounted under one
398 share */
399
400 /* There may be higher info levels that work but are
401 there Windows server or network appliances for which
402 IndexNumber field is not guaranteed unique? */
403
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
405 int rc1 = 0;
406 __u64 inode_num;
407
408 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
409 search_path, &inode_num,
410 cifs_sb->local_nls,
411 cifs_sb->mnt_cifs_flags &
412 CIFS_MOUNT_MAP_SPECIAL_CHR);
413 if (rc1) {
414 cFYI(1,("GetSrvInodeNum rc %d", rc1));
415 /* BB EOPNOSUPP disable SERVER_INUM? */
416 } else /* do we need cast or hash to ino? */
417 (*pinode)->i_ino = inode_num;
418 } /* else ino incremented to unique num in new_inode*/
419 insert_inode_hash(*pinode);
420 }
421 inode = *pinode;
422 cifsInfo = CIFS_I(inode);
423 cifsInfo->cifsAttrs = attr;
424 cFYI(1, ("Old time %ld ", cifsInfo->time));
425 cifsInfo->time = jiffies;
426 cFYI(1, ("New time %ld ", cifsInfo->time));
427
428 /* blksize needs to be multiple of two. So safer to default to
429 blksize and blkbits set in superblock so 2**blkbits and blksize
430 will match rather than setting to:
431 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
432
433 /* Linux can not store file creation time unfortunately so we ignore it */
434 inode->i_atime =
435 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
436 inode->i_mtime =
437 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
438 inode->i_ctime =
439 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
440 cFYI(0, ("Attributes came in as 0x%x ", attr));
441
442 /* set default mode. will override for dirs below */
443 if (atomic_read(&cifsInfo->inUse) == 0)
444 /* new inode, can safely set these fields */
445 inode->i_mode = cifs_sb->mnt_file_mode;
446 else /* since we set the inode type below we need to mask off
447 to avoid strange results if type changes and both get orred in */
448 inode->i_mode &= ~S_IFMT;
449 /* if (attr & ATTR_REPARSE) */
450 /* We no longer handle these as symlinks because we could not
451 follow them due to the absolute path with drive letter */
452 if (attr & ATTR_DIRECTORY) {
453 /* override default perms since we do not do byte range locking
454 on dirs */
455 inode->i_mode = cifs_sb->mnt_dir_mode;
456 inode->i_mode |= S_IFDIR;
457 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
458 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
459 /* No need to le64 convert size of zero */
460 (pfindData->EndOfFile == 0)) {
461 inode->i_mode = cifs_sb->mnt_file_mode;
462 inode->i_mode |= S_IFIFO;
463 /* BB Finish for SFU style symlinks and devices */
464 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
465 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
466 if (decode_sfu_inode(inode,
467 le64_to_cpu(pfindData->EndOfFile),
468 search_path,
469 cifs_sb, xid)) {
470 cFYI(1,("Unrecognized sfu inode type"));
471 }
472 cFYI(1,("sfu mode 0%o",inode->i_mode));
473 } else {
474 inode->i_mode |= S_IFREG;
475 /* treat the dos attribute of read-only as read-only
476 mode e.g. 555 */
477 if (cifsInfo->cifsAttrs & ATTR_READONLY)
478 inode->i_mode &= ~(S_IWUGO);
479 /* BB add code here -
480 validate if device or weird share or device type? */
481 }
482 if (is_size_safe_to_change(cifsInfo)) {
483 /* can not safely change the file size here if the
484 client is writing to it due to potential races */
485 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
486
487 /* 512 bytes (2**9) is the fake blocksize that must be
488 used for this calculation */
489 inode->i_blocks = (512 - 1 + le64_to_cpu(
490 pfindData->AllocationSize)) >> 9;
491 }
492
493 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
494
495 /* BB fill in uid and gid here? with help from winbind?
496 or retrieve from NTFS stream extended attribute */
497 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
498 /* fill in uid, gid, mode from server ACL */
499 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
500 } else if (atomic_read(&cifsInfo->inUse) == 0) {
501 inode->i_uid = cifs_sb->mnt_uid;
502 inode->i_gid = cifs_sb->mnt_gid;
503 /* set so we do not keep refreshing these fields with
504 bad data after user has changed them in memory */
505 atomic_set(&cifsInfo->inUse,1);
506 }
507
508 if (S_ISREG(inode->i_mode)) {
509 cFYI(1, ("File inode"));
510 inode->i_op = &cifs_file_inode_ops;
511 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
513 inode->i_fop =
514 &cifs_file_direct_nobrl_ops;
515 else
516 inode->i_fop = &cifs_file_direct_ops;
517 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
518 inode->i_fop = &cifs_file_nobrl_ops;
519 else /* not direct, send byte range locks */
520 inode->i_fop = &cifs_file_ops;
521
522 inode->i_data.a_ops = &cifs_addr_ops;
523 if(pTcon->ses->server->maxBuf <
524 4096 + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops->readpages = NULL;
526 } else if (S_ISDIR(inode->i_mode)) {
527 cFYI(1, ("Directory inode"));
528 inode->i_op = &cifs_dir_inode_ops;
529 inode->i_fop = &cifs_dir_ops;
530 } else if (S_ISLNK(inode->i_mode)) {
531 cFYI(1, ("Symbolic Link inode"));
532 inode->i_op = &cifs_symlink_inode_ops;
533 } else {
534 init_special_inode(inode, inode->i_mode,
535 inode->i_rdev);
536 }
537 }
538 kfree(buf);
539 return rc;
540 }
541
542 /* gets root inode */
543 void cifs_read_inode(struct inode *inode)
544 {
545 int xid;
546 struct cifs_sb_info *cifs_sb;
547
548 cifs_sb = CIFS_SB(inode->i_sb);
549 xid = GetXid();
550 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
551 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
552 else
553 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
554 /* can not call macro FreeXid here since in a void func */
555 _FreeXid(xid);
556 }
557
558 int cifs_unlink(struct inode *inode, struct dentry *direntry)
559 {
560 int rc = 0;
561 int xid;
562 struct cifs_sb_info *cifs_sb;
563 struct cifsTconInfo *pTcon;
564 char *full_path = NULL;
565 struct cifsInodeInfo *cifsInode;
566 FILE_BASIC_INFO *pinfo_buf;
567
568 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
569
570 xid = GetXid();
571
572 if(inode)
573 cifs_sb = CIFS_SB(inode->i_sb);
574 else
575 cifs_sb = CIFS_SB(direntry->d_sb);
576 pTcon = cifs_sb->tcon;
577
578 /* Unlink can be called from rename so we can not grab the sem here
579 since we deadlock otherwise */
580 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
581 full_path = build_path_from_dentry(direntry);
582 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
583 if (full_path == NULL) {
584 FreeXid(xid);
585 return -ENOMEM;
586 }
587 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
588 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
589
590 if (!rc) {
591 if (direntry->d_inode)
592 direntry->d_inode->i_nlink--;
593 } else if (rc == -ENOENT) {
594 d_drop(direntry);
595 } else if (rc == -ETXTBSY) {
596 int oplock = FALSE;
597 __u16 netfid;
598
599 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
600 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
601 &netfid, &oplock, NULL, cifs_sb->local_nls,
602 cifs_sb->mnt_cifs_flags &
603 CIFS_MOUNT_MAP_SPECIAL_CHR);
604 if (rc==0) {
605 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
606 cifs_sb->local_nls,
607 cifs_sb->mnt_cifs_flags &
608 CIFS_MOUNT_MAP_SPECIAL_CHR);
609 CIFSSMBClose(xid, pTcon, netfid);
610 if (direntry->d_inode)
611 direntry->d_inode->i_nlink--;
612 }
613 } else if (rc == -EACCES) {
614 /* try only if r/o attribute set in local lookup data? */
615 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
616 if (pinfo_buf) {
617 /* ATTRS set to normal clears r/o bit */
618 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
619 if (!(pTcon->ses->flags & CIFS_SES_NT4))
620 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
621 pinfo_buf,
622 cifs_sb->local_nls,
623 cifs_sb->mnt_cifs_flags &
624 CIFS_MOUNT_MAP_SPECIAL_CHR);
625 else
626 rc = -EOPNOTSUPP;
627
628 if (rc == -EOPNOTSUPP) {
629 int oplock = FALSE;
630 __u16 netfid;
631 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
632 full_path,
633 (__u16)ATTR_NORMAL,
634 cifs_sb->local_nls);
635 For some strange reason it seems that NT4 eats the
636 old setattr call without actually setting the
637 attributes so on to the third attempted workaround
638 */
639
640 /* BB could scan to see if we already have it open
641 and pass in pid of opener to function */
642 rc = CIFSSMBOpen(xid, pTcon, full_path,
643 FILE_OPEN, SYNCHRONIZE |
644 FILE_WRITE_ATTRIBUTES, 0,
645 &netfid, &oplock, NULL,
646 cifs_sb->local_nls,
647 cifs_sb->mnt_cifs_flags &
648 CIFS_MOUNT_MAP_SPECIAL_CHR);
649 if (rc==0) {
650 rc = CIFSSMBSetFileTimes(xid, pTcon,
651 pinfo_buf,
652 netfid);
653 CIFSSMBClose(xid, pTcon, netfid);
654 }
655 }
656 kfree(pinfo_buf);
657 }
658 if (rc==0) {
659 rc = CIFSSMBDelFile(xid, pTcon, full_path,
660 cifs_sb->local_nls,
661 cifs_sb->mnt_cifs_flags &
662 CIFS_MOUNT_MAP_SPECIAL_CHR);
663 if (!rc) {
664 if (direntry->d_inode)
665 direntry->d_inode->i_nlink--;
666 } else if (rc == -ETXTBSY) {
667 int oplock = FALSE;
668 __u16 netfid;
669
670 rc = CIFSSMBOpen(xid, pTcon, full_path,
671 FILE_OPEN, DELETE,
672 CREATE_NOT_DIR |
673 CREATE_DELETE_ON_CLOSE,
674 &netfid, &oplock, NULL,
675 cifs_sb->local_nls,
676 cifs_sb->mnt_cifs_flags &
677 CIFS_MOUNT_MAP_SPECIAL_CHR);
678 if (rc==0) {
679 CIFSSMBRenameOpenFile(xid, pTcon,
680 netfid, NULL,
681 cifs_sb->local_nls,
682 cifs_sb->mnt_cifs_flags &
683 CIFS_MOUNT_MAP_SPECIAL_CHR);
684 CIFSSMBClose(xid, pTcon, netfid);
685 if (direntry->d_inode)
686 direntry->d_inode->i_nlink--;
687 }
688 /* BB if rc = -ETXTBUSY goto the rename logic BB */
689 }
690 }
691 }
692 if (direntry->d_inode) {
693 cifsInode = CIFS_I(direntry->d_inode);
694 cifsInode->time = 0; /* will force revalidate to get info
695 when needed */
696 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
697 }
698 if(inode) {
699 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
700 cifsInode = CIFS_I(inode);
701 cifsInode->time = 0; /* force revalidate of dir as well */
702 }
703
704 kfree(full_path);
705 FreeXid(xid);
706 return rc;
707 }
708
709 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
710 {
711 int rc = 0;
712 int xid;
713 struct cifs_sb_info *cifs_sb;
714 struct cifsTconInfo *pTcon;
715 char *full_path = NULL;
716 struct inode *newinode = NULL;
717
718 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
719
720 xid = GetXid();
721
722 cifs_sb = CIFS_SB(inode->i_sb);
723 pTcon = cifs_sb->tcon;
724
725 mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
726 full_path = build_path_from_dentry(direntry);
727 mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
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);
746
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 }
793
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;
802
803 cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
804
805 xid = GetXid();
806
807 cifs_sb = CIFS_SB(inode->i_sb);
808 pTcon = cifs_sb->tcon;
809
810 mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
811 full_path = build_path_from_dentry(direntry);
812 mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
813 if (full_path == NULL) {
814 FreeXid(xid);
815 return -ENOMEM;
816 }
817
818 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
819 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
820
821 if (!rc) {
822 inode->i_nlink--;
823 i_size_write(direntry->d_inode,0);
824 direntry->d_inode->i_nlink = 0;
825 }
826
827 cifsInode = CIFS_I(direntry->d_inode);
828 cifsInode->time = 0; /* force revalidate to go get info when
829 needed */
830 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
831 current_fs_time(inode->i_sb);
832
833 kfree(full_path);
834 FreeXid(xid);
835 return rc;
836 }
837
838 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
839 struct inode *target_inode, struct dentry *target_direntry)
840 {
841 char *fromName;
842 char *toName;
843 struct cifs_sb_info *cifs_sb_source;
844 struct cifs_sb_info *cifs_sb_target;
845 struct cifsTconInfo *pTcon;
846 int xid;
847 int rc = 0;
848
849 xid = GetXid();
850
851 cifs_sb_target = CIFS_SB(target_inode->i_sb);
852 cifs_sb_source = CIFS_SB(source_inode->i_sb);
853 pTcon = cifs_sb_source->tcon;
854
855 if (pTcon != cifs_sb_target->tcon) {
856 FreeXid(xid);
857 return -EXDEV; /* BB actually could be allowed if same server,
858 but different share.
859 Might eventually add support for this */
860 }
861
862 /* we already have the rename sem so we do not need to grab it again
863 here to protect the path integrity */
864 fromName = build_path_from_dentry(source_direntry);
865 toName = build_path_from_dentry(target_direntry);
866 if ((fromName == NULL) || (toName == NULL)) {
867 rc = -ENOMEM;
868 goto cifs_rename_exit;
869 }
870
871 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
872 cifs_sb_source->local_nls,
873 cifs_sb_source->mnt_cifs_flags &
874 CIFS_MOUNT_MAP_SPECIAL_CHR);
875 if (rc == -EEXIST) {
876 /* check if they are the same file because rename of hardlinked
877 files is a noop */
878 FILE_UNIX_BASIC_INFO *info_buf_source;
879 FILE_UNIX_BASIC_INFO *info_buf_target;
880
881 info_buf_source =
882 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
883 if (info_buf_source != NULL) {
884 info_buf_target = info_buf_source + 1;
885 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
886 info_buf_source, cifs_sb_source->local_nls,
887 cifs_sb_source->mnt_cifs_flags &
888 CIFS_MOUNT_MAP_SPECIAL_CHR);
889 if (rc == 0) {
890 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
891 info_buf_target,
892 cifs_sb_target->local_nls,
893 /* remap based on source sb */
894 cifs_sb_source->mnt_cifs_flags &
895 CIFS_MOUNT_MAP_SPECIAL_CHR);
896 }
897 if ((rc == 0) &&
898 (info_buf_source->UniqueId ==
899 info_buf_target->UniqueId)) {
900 /* do not rename since the files are hardlinked which
901 is a noop */
902 } else {
903 /* we either can not tell the files are hardlinked
904 (as with Windows servers) or files are not
905 hardlinked so delete the target manually before
906 renaming to follow POSIX rather than Windows
907 semantics */
908 cifs_unlink(target_inode, target_direntry);
909 rc = CIFSSMBRename(xid, pTcon, fromName,
910 toName,
911 cifs_sb_source->local_nls,
912 cifs_sb_source->mnt_cifs_flags
913 & CIFS_MOUNT_MAP_SPECIAL_CHR);
914 }
915 kfree(info_buf_source);
916 } /* if we can not get memory just leave rc as EEXIST */
917 }
918
919 if (rc) {
920 cFYI(1, ("rename rc %d", rc));
921 }
922
923 if ((rc == -EIO) || (rc == -EEXIST)) {
924 int oplock = FALSE;
925 __u16 netfid;
926
927 /* BB FIXME Is Generic Read correct for rename? */
928 /* if renaming directory - we should not say CREATE_NOT_DIR,
929 need to test renaming open directory, also GENERIC_READ
930 might not right be right access to request */
931 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
932 CREATE_NOT_DIR, &netfid, &oplock, NULL,
933 cifs_sb_source->local_nls,
934 cifs_sb_source->mnt_cifs_flags &
935 CIFS_MOUNT_MAP_SPECIAL_CHR);
936 if (rc==0) {
937 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
938 cifs_sb_source->local_nls,
939 cifs_sb_source->mnt_cifs_flags &
940 CIFS_MOUNT_MAP_SPECIAL_CHR);
941 CIFSSMBClose(xid, pTcon, netfid);
942 }
943 }
944
945 cifs_rename_exit:
946 kfree(fromName);
947 kfree(toName);
948 FreeXid(xid);
949 return rc;
950 }
951
952 int cifs_revalidate(struct dentry *direntry)
953 {
954 int xid;
955 int rc = 0;
956 char *full_path;
957 struct cifs_sb_info *cifs_sb;
958 struct cifsInodeInfo *cifsInode;
959 loff_t local_size;
960 struct timespec local_mtime;
961 int invalidate_inode = FALSE;
962
963 if (direntry->d_inode == NULL)
964 return -ENOENT;
965
966 cifsInode = CIFS_I(direntry->d_inode);
967
968 if (cifsInode == NULL)
969 return -ENOENT;
970
971 /* no sense revalidating inode info on file that no one can write */
972 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
973 return rc;
974
975 xid = GetXid();
976
977 cifs_sb = CIFS_SB(direntry->d_sb);
978
979 /* can not safely grab the rename sem here if rename calls revalidate
980 since that would deadlock */
981 full_path = build_path_from_dentry(direntry);
982 if (full_path == NULL) {
983 FreeXid(xid);
984 return -ENOMEM;
985 }
986 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
987 "jiffies %ld", full_path, direntry->d_inode,
988 direntry->d_inode->i_count.counter, direntry,
989 direntry->d_time, jiffies));
990
991 if (cifsInode->time == 0) {
992 /* was set to zero previously to force revalidate */
993 } else if (time_before(jiffies, cifsInode->time + HZ) &&
994 lookupCacheEnabled) {
995 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
996 (direntry->d_inode->i_nlink == 1)) {
997 kfree(full_path);
998 FreeXid(xid);
999 return rc;
1000 } else {
1001 cFYI(1, ("Have to revalidate file due to hardlinks"));
1002 }
1003 }
1004
1005 /* save mtime and size */
1006 local_mtime = direntry->d_inode->i_mtime;
1007 local_size = direntry->d_inode->i_size;
1008
1009 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1010 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1011 direntry->d_sb,xid);
1012 if (rc) {
1013 cFYI(1, ("error on getting revalidate info %d", rc));
1014 /* if (rc != -ENOENT)
1015 rc = 0; */ /* BB should we cache info on
1016 certain errors? */
1017 }
1018 } else {
1019 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1020 direntry->d_sb,xid);
1021 if (rc) {
1022 cFYI(1, ("error on getting revalidate info %d", rc));
1023 /* if (rc != -ENOENT)
1024 rc = 0; */ /* BB should we cache info on
1025 certain errors? */
1026 }
1027 }
1028 /* should we remap certain errors, access denied?, to zero */
1029
1030 /* if not oplocked, we invalidate inode pages if mtime or file size
1031 had changed on server */
1032
1033 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1034 (local_size == direntry->d_inode->i_size)) {
1035 cFYI(1, ("cifs_revalidate - inode unchanged"));
1036 } else {
1037 /* file may have changed on server */
1038 if (cifsInode->clientCanCacheRead) {
1039 /* no need to invalidate inode pages since we were the
1040 only ones who could have modified the file and the
1041 server copy is staler than ours */
1042 } else {
1043 invalidate_inode = TRUE;
1044 }
1045 }
1046
1047 /* can not grab this sem since kernel filesys locking documentation
1048 indicates i_mutex may be taken by the kernel on lookup and rename
1049 which could deadlock if we grab the i_mutex here as well */
1050 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1051 /* need to write out dirty pages here */
1052 if (direntry->d_inode->i_mapping) {
1053 /* do we need to lock inode until after invalidate completes
1054 below? */
1055 filemap_fdatawrite(direntry->d_inode->i_mapping);
1056 }
1057 if (invalidate_inode) {
1058 /* shrink_dcache not necessary now that cifs dentry ops
1059 are exported for negative dentries */
1060 /* if(S_ISDIR(direntry->d_inode->i_mode))
1061 shrink_dcache_parent(direntry); */
1062 if (S_ISREG(direntry->d_inode->i_mode)) {
1063 if (direntry->d_inode->i_mapping)
1064 filemap_fdatawait(direntry->d_inode->i_mapping);
1065 /* may eventually have to do this for open files too */
1066 if (list_empty(&(cifsInode->openFileList))) {
1067 /* changed on server - flush read ahead pages */
1068 cFYI(1, ("Invalidating read ahead data on "
1069 "closed file"));
1070 invalidate_remote_inode(direntry->d_inode);
1071 }
1072 }
1073 }
1074 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1075
1076 kfree(full_path);
1077 FreeXid(xid);
1078 return rc;
1079 }
1080
1081 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1082 struct kstat *stat)
1083 {
1084 int err = cifs_revalidate(dentry);
1085 if (!err)
1086 generic_fillattr(dentry->d_inode, stat);
1087 return err;
1088 }
1089
1090 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1091 {
1092 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1093 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1094 struct page *page;
1095 char *kaddr;
1096 int rc = 0;
1097
1098 page = grab_cache_page(mapping, index);
1099 if (!page)
1100 return -ENOMEM;
1101
1102 kaddr = kmap_atomic(page, KM_USER0);
1103 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1104 flush_dcache_page(page);
1105 kunmap_atomic(kaddr, KM_USER0);
1106 unlock_page(page);
1107 page_cache_release(page);
1108 return rc;
1109 }
1110
1111 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1112 {
1113 int xid;
1114 struct cifs_sb_info *cifs_sb;
1115 struct cifsTconInfo *pTcon;
1116 char *full_path = NULL;
1117 int rc = -EACCES;
1118 struct cifsFileInfo *open_file = NULL;
1119 FILE_BASIC_INFO time_buf;
1120 int set_time = FALSE;
1121 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1122 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1123 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1124 struct cifsInodeInfo *cifsInode;
1125
1126 xid = GetXid();
1127
1128 cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1129 direntry->d_name.name, attrs->ia_valid));
1130
1131 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1132 pTcon = cifs_sb->tcon;
1133
1134 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1135 /* check if we have permission to change attrs */
1136 rc = inode_change_ok(direntry->d_inode, attrs);
1137 if(rc < 0) {
1138 FreeXid(xid);
1139 return rc;
1140 } else
1141 rc = 0;
1142 }
1143
1144 mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
1145 full_path = build_path_from_dentry(direntry);
1146 mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
1147 if (full_path == NULL) {
1148 FreeXid(xid);
1149 return -ENOMEM;
1150 }
1151 cifsInode = CIFS_I(direntry->d_inode);
1152
1153 /* BB check if we need to refresh inode from server now ? BB */
1154
1155 /* need to flush data before changing file size on server */
1156 filemap_write_and_wait(direntry->d_inode->i_mapping);
1157
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 */
1166 open_file = find_writable_file(cifsInode);
1167 if (open_file) {
1168 __u16 nfid = open_file->netfid;
1169 __u32 npid = open_file->pid;
1170 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1171 nfid, npid, FALSE);
1172 atomic_dec(&open_file->wrtPending);
1173 cFYI(1,("SetFSize for attrs rc = %d", rc));
1174 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1175 int bytes_written;
1176 rc = CIFSSMBWrite(xid, pTcon,
1177 nfid, 0, attrs->ia_size,
1178 &bytes_written, NULL, NULL,
1179 1 /* 45 seconds */);
1180 cFYI(1,("Wrt seteof rc %d", rc));
1181 }
1182 } else
1183 rc = -EINVAL;
1184
1185 if (rc != 0) {
1186 /* Set file size by pathname rather than by handle
1187 either because no valid, writeable file handle for
1188 it was found or because there was an error setting
1189 it by handle */
1190 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1191 attrs->ia_size, FALSE,
1192 cifs_sb->local_nls,
1193 cifs_sb->mnt_cifs_flags &
1194 CIFS_MOUNT_MAP_SPECIAL_CHR);
1195 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1196 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1197 __u16 netfid;
1198 int oplock = FALSE;
1199
1200 rc = SMBLegacyOpen(xid, pTcon, full_path,
1201 FILE_OPEN,
1202 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1203 CREATE_NOT_DIR, &netfid, &oplock,
1204 NULL, cifs_sb->local_nls,
1205 cifs_sb->mnt_cifs_flags &
1206 CIFS_MOUNT_MAP_SPECIAL_CHR);
1207 if (rc==0) {
1208 int bytes_written;
1209 rc = CIFSSMBWrite(xid, pTcon,
1210 netfid, 0,
1211 attrs->ia_size,
1212 &bytes_written, NULL,
1213 NULL, 1 /* 45 sec */);
1214 cFYI(1,("wrt seteof rc %d",rc));
1215 CIFSSMBClose(xid, pTcon, netfid);
1216 }
1217
1218 }
1219 }
1220
1221 /* Server is ok setting allocation size implicitly - no need
1222 to call:
1223 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1224 cifs_sb->local_nls);
1225 */
1226
1227 if (rc == 0) {
1228 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1229 cifs_truncate_page(direntry->d_inode->i_mapping,
1230 direntry->d_inode->i_size);
1231 } else
1232 goto cifs_setattr_exit;
1233 }
1234 if (attrs->ia_valid & ATTR_UID) {
1235 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1236 uid = attrs->ia_uid;
1237 }
1238 if (attrs->ia_valid & ATTR_GID) {
1239 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1240 gid = attrs->ia_gid;
1241 }
1242
1243 time_buf.Attributes = 0;
1244 if (attrs->ia_valid & ATTR_MODE) {
1245 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1246 mode = attrs->ia_mode;
1247 }
1248
1249 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1250 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1251 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1252 0 /* dev_t */, cifs_sb->local_nls,
1253 cifs_sb->mnt_cifs_flags &
1254 CIFS_MOUNT_MAP_SPECIAL_CHR);
1255 else if (attrs->ia_valid & ATTR_MODE) {
1256 rc = 0;
1257 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1258 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1259 time_buf.Attributes =
1260 cpu_to_le32(cifsInode->cifsAttrs |
1261 ATTR_READONLY);
1262 } else if ((mode & S_IWUGO) == S_IWUGO) {
1263 if (cifsInode->cifsAttrs & ATTR_READONLY)
1264 time_buf.Attributes =
1265 cpu_to_le32(cifsInode->cifsAttrs &
1266 (~ATTR_READONLY));
1267 }
1268 /* BB to be implemented -
1269 via Windows security descriptors or streams */
1270 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1271 cifs_sb->local_nls); */
1272 }
1273
1274 if (attrs->ia_valid & ATTR_ATIME) {
1275 set_time = TRUE;
1276 time_buf.LastAccessTime =
1277 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1278 } else
1279 time_buf.LastAccessTime = 0;
1280
1281 if (attrs->ia_valid & ATTR_MTIME) {
1282 set_time = TRUE;
1283 time_buf.LastWriteTime =
1284 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1285 } else
1286 time_buf.LastWriteTime = 0;
1287 /* Do not set ctime explicitly unless other time
1288 stamps are changed explicitly (i.e. by utime()
1289 since we would then have a mix of client and
1290 server times */
1291
1292 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1293 set_time = TRUE;
1294 /* Although Samba throws this field away
1295 it may be useful to Windows - but we do
1296 not want to set ctime unless some other
1297 timestamp is changing */
1298 cFYI(1, ("CIFS - CTIME changed "));
1299 time_buf.ChangeTime =
1300 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1301 } else
1302 time_buf.ChangeTime = 0;
1303
1304 if (set_time || time_buf.Attributes) {
1305 time_buf.CreationTime = 0; /* do not change */
1306 /* In the future we should experiment - try setting timestamps
1307 via Handle (SetFileInfo) instead of by path */
1308 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1309 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1310 cifs_sb->local_nls,
1311 cifs_sb->mnt_cifs_flags &
1312 CIFS_MOUNT_MAP_SPECIAL_CHR);
1313 else
1314 rc = -EOPNOTSUPP;
1315
1316 if (rc == -EOPNOTSUPP) {
1317 int oplock = FALSE;
1318 __u16 netfid;
1319
1320 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1321 "times not supported by this server"));
1322 /* BB we could scan to see if we already have it open
1323 and pass in pid of opener to function */
1324 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1325 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1326 CREATE_NOT_DIR, &netfid, &oplock,
1327 NULL, cifs_sb->local_nls,
1328 cifs_sb->mnt_cifs_flags &
1329 CIFS_MOUNT_MAP_SPECIAL_CHR);
1330 if (rc==0) {
1331 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1332 netfid);
1333 CIFSSMBClose(xid, pTcon, netfid);
1334 } else {
1335 /* BB For even older servers we could convert time_buf
1336 into old DOS style which uses two second
1337 granularity */
1338
1339 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1340 &time_buf, cifs_sb->local_nls); */
1341 }
1342 }
1343 /* Even if error on time set, no sense failing the call if
1344 the server would set the time to a reasonable value anyway,
1345 and this check ensures that we are not being called from
1346 sys_utimes in which case we ought to fail the call back to
1347 the user when the server rejects the call */
1348 if((rc) && (attrs->ia_valid &&
1349 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1350 rc = 0;
1351 }
1352
1353 /* do not need local check to inode_check_ok since the server does
1354 that */
1355 if (!rc)
1356 rc = inode_setattr(direntry->d_inode, attrs);
1357 cifs_setattr_exit:
1358 kfree(full_path);
1359 FreeXid(xid);
1360 return rc;
1361 }
1362
1363 void cifs_delete_inode(struct inode *inode)
1364 {
1365 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1366 /* may have to add back in if and when safe distributed caching of
1367 directories added e.g. via FindNotify */
1368 }
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