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[deliverable/linux.git] / fs / cifs / inode.c
1 /*
2 * fs/cifs/inode.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/fs.h>
22 #include <linux/stat.h>
23 #include <linux/pagemap.h>
24 #include <asm/div64.h>
25 #include "cifsfs.h"
26 #include "cifspdu.h"
27 #include "cifsglob.h"
28 #include "cifsproto.h"
29 #include "cifs_debug.h"
30 #include "cifs_fs_sb.h"
31
32 int cifs_get_inode_info_unix(struct inode **pinode,
33 const unsigned char *search_path, struct super_block *sb, int xid)
34 {
35 int rc = 0;
36 FILE_UNIX_BASIC_INFO findData;
37 struct cifsTconInfo *pTcon;
38 struct inode *inode;
39 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
40 char *tmp_path;
41
42 pTcon = cifs_sb->tcon;
43 cFYI(1, ("Getting info on %s", search_path));
44 /* could have done a find first instead but this returns more info */
45 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
46 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
47 CIFS_MOUNT_MAP_SPECIAL_CHR);
48 /* dump_mem("\nUnixQPathInfo return data", &findData,
49 sizeof(findData)); */
50 if (rc) {
51 if (rc == -EREMOTE) {
52 tmp_path =
53 kmalloc(strnlen(pTcon->treeName,
54 MAX_TREE_SIZE + 1) +
55 strnlen(search_path, MAX_PATHCONF) + 1,
56 GFP_KERNEL);
57 if (tmp_path == NULL) {
58 return -ENOMEM;
59 }
60 /* have to skip first of the double backslash of
61 UNC name */
62 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
63 strncat(tmp_path, search_path, MAX_PATHCONF);
64 rc = connect_to_dfs_path(xid, pTcon->ses,
65 /* treename + */ tmp_path,
66 cifs_sb->local_nls,
67 cifs_sb->mnt_cifs_flags &
68 CIFS_MOUNT_MAP_SPECIAL_CHR);
69 kfree(tmp_path);
70
71 /* BB fix up inode etc. */
72 } else if (rc) {
73 return rc;
74 }
75 } else {
76 struct cifsInodeInfo *cifsInfo;
77 __u32 type = le32_to_cpu(findData.Type);
78 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
79 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
80
81 /* get new inode */
82 if (*pinode == NULL) {
83 *pinode = new_inode(sb);
84 if (*pinode == NULL)
85 return -ENOMEM;
86 /* Is an i_ino of zero legal? */
87 /* Are there sanity checks we can use to ensure that
88 the server is really filling in that field? */
89 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
90 (*pinode)->i_ino =
91 (unsigned long)findData.UniqueId;
92 } /* note ino incremented to unique num in new_inode */
93 if (sb->s_flags & MS_NOATIME)
94 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
95
96 insert_inode_hash(*pinode);
97 }
98
99 inode = *pinode;
100 cifsInfo = CIFS_I(inode);
101
102 cFYI(1, ("Old time %ld", cifsInfo->time));
103 cifsInfo->time = jiffies;
104 cFYI(1, ("New time %ld", cifsInfo->time));
105 /* this is ok to set on every inode revalidate */
106 atomic_set(&cifsInfo->inUse,1);
107
108 inode->i_atime =
109 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
110 inode->i_mtime =
111 cifs_NTtimeToUnix(le64_to_cpu
112 (findData.LastModificationTime));
113 inode->i_ctime =
114 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
115 inode->i_mode = le64_to_cpu(findData.Permissions);
116 /* since we set the inode type below we need to mask off
117 to avoid strange results if bits set above */
118 inode->i_mode &= ~S_IFMT;
119 if (type == UNIX_FILE) {
120 inode->i_mode |= S_IFREG;
121 } else if (type == UNIX_SYMLINK) {
122 inode->i_mode |= S_IFLNK;
123 } else if (type == UNIX_DIR) {
124 inode->i_mode |= S_IFDIR;
125 } else if (type == UNIX_CHARDEV) {
126 inode->i_mode |= S_IFCHR;
127 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
128 le64_to_cpu(findData.DevMinor) & MINORMASK);
129 } else if (type == UNIX_BLOCKDEV) {
130 inode->i_mode |= S_IFBLK;
131 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
132 le64_to_cpu(findData.DevMinor) & MINORMASK);
133 } else if (type == UNIX_FIFO) {
134 inode->i_mode |= S_IFIFO;
135 } else if (type == UNIX_SOCKET) {
136 inode->i_mode |= S_IFSOCK;
137 } else {
138 /* safest to call it a file if we do not know */
139 inode->i_mode |= S_IFREG;
140 cFYI(1,("unknown type %d",type));
141 }
142
143 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
144 inode->i_uid = cifs_sb->mnt_uid;
145 else
146 inode->i_uid = le64_to_cpu(findData.Uid);
147
148 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
149 inode->i_gid = cifs_sb->mnt_gid;
150 else
151 inode->i_gid = le64_to_cpu(findData.Gid);
152
153 inode->i_nlink = le64_to_cpu(findData.Nlinks);
154
155 spin_lock(&inode->i_lock);
156 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
157 /* can not safely change the file size here if the
158 client is writing to it due to potential races */
159 i_size_write(inode, end_of_file);
160
161 /* blksize needs to be multiple of two. So safer to default to
162 blksize and blkbits set in superblock so 2**blkbits and blksize
163 will match rather than setting to:
164 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
165
166 /* This seems incredibly stupid but it turns out that i_blocks
167 is not related to (i_size / i_blksize), instead 512 byte size
168 is required for calculating num blocks */
169
170 /* 512 bytes (2**9) is the fake blocksize that must be used */
171 /* for this calculation */
172 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
173 }
174 spin_unlock(&inode->i_lock);
175
176 if (num_of_bytes < end_of_file)
177 cFYI(1, ("allocation size less than end of file"));
178 cFYI(1, ("Size %ld and blocks %llu",
179 (unsigned long) inode->i_size,
180 (unsigned long long)inode->i_blocks));
181 if (S_ISREG(inode->i_mode)) {
182 cFYI(1, ("File inode"));
183 inode->i_op = &cifs_file_inode_ops;
184 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
185 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
186 inode->i_fop =
187 &cifs_file_direct_nobrl_ops;
188 else
189 inode->i_fop = &cifs_file_direct_ops;
190 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
191 inode->i_fop = &cifs_file_nobrl_ops;
192 else /* not direct, send byte range locks */
193 inode->i_fop = &cifs_file_ops;
194
195 /* check if server can support readpages */
196 if (pTcon->ses->server->maxBuf <
197 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
198 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
199 else
200 inode->i_data.a_ops = &cifs_addr_ops;
201 } else if (S_ISDIR(inode->i_mode)) {
202 cFYI(1, ("Directory inode"));
203 inode->i_op = &cifs_dir_inode_ops;
204 inode->i_fop = &cifs_dir_ops;
205 } else if (S_ISLNK(inode->i_mode)) {
206 cFYI(1, ("Symbolic Link inode"));
207 inode->i_op = &cifs_symlink_inode_ops;
208 /* tmp_inode->i_fop = */ /* do not need to set to anything */
209 } else {
210 cFYI(1, ("Init special inode"));
211 init_special_inode(inode, inode->i_mode,
212 inode->i_rdev);
213 }
214 }
215 return rc;
216 }
217
218 static int decode_sfu_inode(struct inode * inode, __u64 size,
219 const unsigned char *path,
220 struct cifs_sb_info *cifs_sb, int xid)
221 {
222 int rc;
223 int oplock = FALSE;
224 __u16 netfid;
225 struct cifsTconInfo *pTcon = cifs_sb->tcon;
226 char buf[24];
227 unsigned int bytes_read;
228 char * pbuf;
229
230 pbuf = buf;
231
232 if (size == 0) {
233 inode->i_mode |= S_IFIFO;
234 return 0;
235 } else if (size < 8) {
236 return -EINVAL; /* EOPNOTSUPP? */
237 }
238
239 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
240 CREATE_NOT_DIR, &netfid, &oplock, NULL,
241 cifs_sb->local_nls,
242 cifs_sb->mnt_cifs_flags &
243 CIFS_MOUNT_MAP_SPECIAL_CHR);
244 if (rc==0) {
245 int buf_type = CIFS_NO_BUFFER;
246 /* Read header */
247 rc = CIFSSMBRead(xid, pTcon,
248 netfid,
249 24 /* length */, 0 /* offset */,
250 &bytes_read, &pbuf, &buf_type);
251 if ((rc == 0) && (bytes_read >= 8)) {
252 if (memcmp("IntxBLK", pbuf, 8) == 0) {
253 cFYI(1,("Block device"));
254 inode->i_mode |= S_IFBLK;
255 if (bytes_read == 24) {
256 /* we have enough to decode dev num */
257 __u64 mjr; /* major */
258 __u64 mnr; /* minor */
259 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
260 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
261 inode->i_rdev = MKDEV(mjr, mnr);
262 }
263 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
264 cFYI(1,("Char device"));
265 inode->i_mode |= S_IFCHR;
266 if (bytes_read == 24) {
267 /* we have enough to decode dev num */
268 __u64 mjr; /* major */
269 __u64 mnr; /* minor */
270 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
271 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
272 inode->i_rdev = MKDEV(mjr, mnr);
273 }
274 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
275 cFYI(1,("Symlink"));
276 inode->i_mode |= S_IFLNK;
277 } else {
278 inode->i_mode |= S_IFREG; /* file? */
279 rc = -EOPNOTSUPP;
280 }
281 } else {
282 inode->i_mode |= S_IFREG; /* then it is a file */
283 rc = -EOPNOTSUPP; /* or some unknown SFU type */
284 }
285 CIFSSMBClose(xid, pTcon, netfid);
286 }
287 return rc;
288
289 }
290
291 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
292
293 static int get_sfu_uid_mode(struct inode * inode,
294 const unsigned char *path,
295 struct cifs_sb_info *cifs_sb, int xid)
296 {
297 #ifdef CONFIG_CIFS_XATTR
298 ssize_t rc;
299 char ea_value[4];
300 __u32 mode;
301
302 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
303 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
304 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
305 if (rc < 0)
306 return (int)rc;
307 else if (rc > 3) {
308 mode = le32_to_cpu(*((__le32 *)ea_value));
309 inode->i_mode &= ~SFBITS_MASK;
310 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
311 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
312 cFYI(1,("special mode bits 0%o", mode));
313 return 0;
314 } else {
315 return 0;
316 }
317 #else
318 return -EOPNOTSUPP;
319 #endif
320
321
322 }
323
324 int cifs_get_inode_info(struct inode **pinode,
325 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
326 struct super_block *sb, int xid)
327 {
328 int rc = 0;
329 struct cifsTconInfo *pTcon;
330 struct inode *inode;
331 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
332 char *tmp_path;
333 char *buf = NULL;
334 int adjustTZ = FALSE;
335
336 pTcon = cifs_sb->tcon;
337 cFYI(1,("Getting info on %s", search_path));
338
339 if ((pfindData == NULL) && (*pinode != NULL)) {
340 if (CIFS_I(*pinode)->clientCanCacheRead) {
341 cFYI(1,("No need to revalidate cached inode sizes"));
342 return rc;
343 }
344 }
345
346 /* if file info not passed in then get it from server */
347 if (pfindData == NULL) {
348 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
349 if (buf == NULL)
350 return -ENOMEM;
351 pfindData = (FILE_ALL_INFO *)buf;
352 /* could do find first instead but this returns more info */
353 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
354 0 /* not legacy */,
355 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
356 CIFS_MOUNT_MAP_SPECIAL_CHR);
357 /* BB optimize code so we do not make the above call
358 when server claims no NT SMB support and the above call
359 failed at least once - set flag in tcon or mount */
360 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
361 rc = SMBQueryInformation(xid, pTcon, search_path,
362 pfindData, cifs_sb->local_nls,
363 cifs_sb->mnt_cifs_flags &
364 CIFS_MOUNT_MAP_SPECIAL_CHR);
365 adjustTZ = TRUE;
366 }
367
368 }
369 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
370 if (rc) {
371 if (rc == -EREMOTE) {
372 tmp_path =
373 kmalloc(strnlen
374 (pTcon->treeName,
375 MAX_TREE_SIZE + 1) +
376 strnlen(search_path, MAX_PATHCONF) + 1,
377 GFP_KERNEL);
378 if (tmp_path == NULL) {
379 kfree(buf);
380 return -ENOMEM;
381 }
382
383 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
384 strncat(tmp_path, search_path, MAX_PATHCONF);
385 rc = connect_to_dfs_path(xid, pTcon->ses,
386 /* treename + */ tmp_path,
387 cifs_sb->local_nls,
388 cifs_sb->mnt_cifs_flags &
389 CIFS_MOUNT_MAP_SPECIAL_CHR);
390 kfree(tmp_path);
391 /* BB fix up inode etc. */
392 } else if (rc) {
393 kfree(buf);
394 return rc;
395 }
396 } else {
397 struct cifsInodeInfo *cifsInfo;
398 __u32 attr = le32_to_cpu(pfindData->Attributes);
399
400 /* get new inode */
401 if (*pinode == NULL) {
402 *pinode = new_inode(sb);
403 if (*pinode == NULL) {
404 kfree(buf);
405 return -ENOMEM;
406 }
407 /* Is an i_ino of zero legal? Can we use that to check
408 if the server supports returning inode numbers? Are
409 there other sanity checks we can use to ensure that
410 the server is really filling in that field? */
411
412 /* We can not use the IndexNumber field by default from
413 Windows or Samba (in ALL_INFO buf) but we can request
414 it explicitly. It may not be unique presumably if
415 the server has multiple devices mounted under one
416 share */
417
418 /* There may be higher info levels that work but are
419 there Windows server or network appliances for which
420 IndexNumber field is not guaranteed unique? */
421
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
423 int rc1 = 0;
424 __u64 inode_num;
425
426 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
427 search_path, &inode_num,
428 cifs_sb->local_nls,
429 cifs_sb->mnt_cifs_flags &
430 CIFS_MOUNT_MAP_SPECIAL_CHR);
431 if (rc1) {
432 cFYI(1,("GetSrvInodeNum rc %d", rc1));
433 /* BB EOPNOSUPP disable SERVER_INUM? */
434 } else /* do we need cast or hash to ino? */
435 (*pinode)->i_ino = inode_num;
436 } /* else ino incremented to unique num in new_inode*/
437 if (sb->s_flags & MS_NOATIME)
438 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
439 insert_inode_hash(*pinode);
440 }
441 inode = *pinode;
442 cifsInfo = CIFS_I(inode);
443 cifsInfo->cifsAttrs = attr;
444 cFYI(1, ("Old time %ld", cifsInfo->time));
445 cifsInfo->time = jiffies;
446 cFYI(1, ("New time %ld", cifsInfo->time));
447
448 /* blksize needs to be multiple of two. So safer to default to
449 blksize and blkbits set in superblock so 2**blkbits and blksize
450 will match rather than setting to:
451 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
452
453 /* Linux can not store file creation time so ignore it */
454 if (pfindData->LastAccessTime)
455 inode->i_atime = cifs_NTtimeToUnix
456 (le64_to_cpu(pfindData->LastAccessTime));
457 else /* do not need to use current_fs_time - time not stored */
458 inode->i_atime = CURRENT_TIME;
459 inode->i_mtime =
460 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
461 inode->i_ctime =
462 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
463 cFYI(0, ("Attributes came in as 0x%x", attr));
464 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
465 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
466 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
467 }
468
469 /* set default mode. will override for dirs below */
470 if (atomic_read(&cifsInfo->inUse) == 0)
471 /* new inode, can safely set these fields */
472 inode->i_mode = cifs_sb->mnt_file_mode;
473 else /* since we set the inode type below we need to mask off
474 to avoid strange results if type changes and both get orred in */
475 inode->i_mode &= ~S_IFMT;
476 /* if (attr & ATTR_REPARSE) */
477 /* We no longer handle these as symlinks because we could not
478 follow them due to the absolute path with drive letter */
479 if (attr & ATTR_DIRECTORY) {
480 /* override default perms since we do not do byte range locking
481 on dirs */
482 inode->i_mode = cifs_sb->mnt_dir_mode;
483 inode->i_mode |= S_IFDIR;
484 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
485 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
486 /* No need to le64 convert size of zero */
487 (pfindData->EndOfFile == 0)) {
488 inode->i_mode = cifs_sb->mnt_file_mode;
489 inode->i_mode |= S_IFIFO;
490 /* BB Finish for SFU style symlinks and devices */
491 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
492 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
493 if (decode_sfu_inode(inode,
494 le64_to_cpu(pfindData->EndOfFile),
495 search_path,
496 cifs_sb, xid)) {
497 cFYI(1,("Unrecognized sfu inode type"));
498 }
499 cFYI(1,("sfu mode 0%o",inode->i_mode));
500 } else {
501 inode->i_mode |= S_IFREG;
502 /* treat the dos attribute of read-only as read-only
503 mode e.g. 555 */
504 if (cifsInfo->cifsAttrs & ATTR_READONLY)
505 inode->i_mode &= ~(S_IWUGO);
506 else if ((inode->i_mode & S_IWUGO) == 0)
507 /* the ATTR_READONLY flag may have been */
508 /* changed on server -- set any w bits */
509 /* allowed by mnt_file_mode */
510 inode->i_mode |= (S_IWUGO &
511 cifs_sb->mnt_file_mode);
512 /* BB add code here -
513 validate if device or weird share or device type? */
514 }
515
516 spin_lock(&inode->i_lock);
517 if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
518 /* can not safely shrink the file size here if the
519 client is writing to it due to potential races */
520 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
521
522 /* 512 bytes (2**9) is the fake blocksize that must be
523 used for this calculation */
524 inode->i_blocks = (512 - 1 + le64_to_cpu(
525 pfindData->AllocationSize)) >> 9;
526 }
527 spin_unlock(&inode->i_lock);
528
529 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
530
531 /* BB fill in uid and gid here? with help from winbind?
532 or retrieve from NTFS stream extended attribute */
533 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
534 /* fill in uid, gid, mode from server ACL */
535 /* BB FIXME this should also take into account the
536 * default uid specified on mount if present */
537 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
538 } else if (atomic_read(&cifsInfo->inUse) == 0) {
539 inode->i_uid = cifs_sb->mnt_uid;
540 inode->i_gid = cifs_sb->mnt_gid;
541 /* set so we do not keep refreshing these fields with
542 bad data after user has changed them in memory */
543 atomic_set(&cifsInfo->inUse,1);
544 }
545
546 if (S_ISREG(inode->i_mode)) {
547 cFYI(1, ("File inode"));
548 inode->i_op = &cifs_file_inode_ops;
549 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
550 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
551 inode->i_fop =
552 &cifs_file_direct_nobrl_ops;
553 else
554 inode->i_fop = &cifs_file_direct_ops;
555 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
556 inode->i_fop = &cifs_file_nobrl_ops;
557 else /* not direct, send byte range locks */
558 inode->i_fop = &cifs_file_ops;
559
560 if (pTcon->ses->server->maxBuf <
561 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
562 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
563 else
564 inode->i_data.a_ops = &cifs_addr_ops;
565 } else if (S_ISDIR(inode->i_mode)) {
566 cFYI(1, ("Directory inode"));
567 inode->i_op = &cifs_dir_inode_ops;
568 inode->i_fop = &cifs_dir_ops;
569 } else if (S_ISLNK(inode->i_mode)) {
570 cFYI(1, ("Symbolic Link inode"));
571 inode->i_op = &cifs_symlink_inode_ops;
572 } else {
573 init_special_inode(inode, inode->i_mode,
574 inode->i_rdev);
575 }
576 }
577 kfree(buf);
578 return rc;
579 }
580
581 /* gets root inode */
582 void cifs_read_inode(struct inode *inode)
583 {
584 int xid;
585 struct cifs_sb_info *cifs_sb;
586
587 cifs_sb = CIFS_SB(inode->i_sb);
588 xid = GetXid();
589 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
590 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
591 else
592 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
593 /* can not call macro FreeXid here since in a void func */
594 _FreeXid(xid);
595 }
596
597 int cifs_unlink(struct inode *inode, struct dentry *direntry)
598 {
599 int rc = 0;
600 int xid;
601 struct cifs_sb_info *cifs_sb;
602 struct cifsTconInfo *pTcon;
603 char *full_path = NULL;
604 struct cifsInodeInfo *cifsInode;
605 FILE_BASIC_INFO *pinfo_buf;
606
607 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
608
609 xid = GetXid();
610
611 if (inode)
612 cifs_sb = CIFS_SB(inode->i_sb);
613 else
614 cifs_sb = CIFS_SB(direntry->d_sb);
615 pTcon = cifs_sb->tcon;
616
617 /* Unlink can be called from rename so we can not grab the sem here
618 since we deadlock otherwise */
619 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
620 full_path = build_path_from_dentry(direntry);
621 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
622 if (full_path == NULL) {
623 FreeXid(xid);
624 return -ENOMEM;
625 }
626 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
627 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
628
629 if (!rc) {
630 if (direntry->d_inode)
631 drop_nlink(direntry->d_inode);
632 } else if (rc == -ENOENT) {
633 d_drop(direntry);
634 } else if (rc == -ETXTBSY) {
635 int oplock = FALSE;
636 __u16 netfid;
637
638 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
639 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
640 &netfid, &oplock, NULL, cifs_sb->local_nls,
641 cifs_sb->mnt_cifs_flags &
642 CIFS_MOUNT_MAP_SPECIAL_CHR);
643 if (rc==0) {
644 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
645 cifs_sb->local_nls,
646 cifs_sb->mnt_cifs_flags &
647 CIFS_MOUNT_MAP_SPECIAL_CHR);
648 CIFSSMBClose(xid, pTcon, netfid);
649 if (direntry->d_inode)
650 drop_nlink(direntry->d_inode);
651 }
652 } else if (rc == -EACCES) {
653 /* try only if r/o attribute set in local lookup data? */
654 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
655 if (pinfo_buf) {
656 /* ATTRS set to normal clears r/o bit */
657 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
658 if (!(pTcon->ses->flags & CIFS_SES_NT4))
659 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
660 pinfo_buf,
661 cifs_sb->local_nls,
662 cifs_sb->mnt_cifs_flags &
663 CIFS_MOUNT_MAP_SPECIAL_CHR);
664 else
665 rc = -EOPNOTSUPP;
666
667 if (rc == -EOPNOTSUPP) {
668 int oplock = FALSE;
669 __u16 netfid;
670 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
671 full_path,
672 (__u16)ATTR_NORMAL,
673 cifs_sb->local_nls);
674 For some strange reason it seems that NT4 eats the
675 old setattr call without actually setting the
676 attributes so on to the third attempted workaround
677 */
678
679 /* BB could scan to see if we already have it open
680 and pass in pid of opener to function */
681 rc = CIFSSMBOpen(xid, pTcon, full_path,
682 FILE_OPEN, SYNCHRONIZE |
683 FILE_WRITE_ATTRIBUTES, 0,
684 &netfid, &oplock, NULL,
685 cifs_sb->local_nls,
686 cifs_sb->mnt_cifs_flags &
687 CIFS_MOUNT_MAP_SPECIAL_CHR);
688 if (rc==0) {
689 rc = CIFSSMBSetFileTimes(xid, pTcon,
690 pinfo_buf,
691 netfid);
692 CIFSSMBClose(xid, pTcon, netfid);
693 }
694 }
695 kfree(pinfo_buf);
696 }
697 if (rc==0) {
698 rc = CIFSSMBDelFile(xid, pTcon, full_path,
699 cifs_sb->local_nls,
700 cifs_sb->mnt_cifs_flags &
701 CIFS_MOUNT_MAP_SPECIAL_CHR);
702 if (!rc) {
703 if (direntry->d_inode)
704 drop_nlink(direntry->d_inode);
705 } else if (rc == -ETXTBSY) {
706 int oplock = FALSE;
707 __u16 netfid;
708
709 rc = CIFSSMBOpen(xid, pTcon, full_path,
710 FILE_OPEN, DELETE,
711 CREATE_NOT_DIR |
712 CREATE_DELETE_ON_CLOSE,
713 &netfid, &oplock, NULL,
714 cifs_sb->local_nls,
715 cifs_sb->mnt_cifs_flags &
716 CIFS_MOUNT_MAP_SPECIAL_CHR);
717 if (rc==0) {
718 CIFSSMBRenameOpenFile(xid, pTcon,
719 netfid, NULL,
720 cifs_sb->local_nls,
721 cifs_sb->mnt_cifs_flags &
722 CIFS_MOUNT_MAP_SPECIAL_CHR);
723 CIFSSMBClose(xid, pTcon, netfid);
724 if (direntry->d_inode)
725 drop_nlink(direntry->d_inode);
726 }
727 /* BB if rc = -ETXTBUSY goto the rename logic BB */
728 }
729 }
730 }
731 if (direntry->d_inode) {
732 cifsInode = CIFS_I(direntry->d_inode);
733 cifsInode->time = 0; /* will force revalidate to get info
734 when needed */
735 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
736 }
737 if (inode) {
738 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
739 cifsInode = CIFS_I(inode);
740 cifsInode->time = 0; /* force revalidate of dir as well */
741 }
742
743 kfree(full_path);
744 FreeXid(xid);
745 return rc;
746 }
747
748 static void posix_fill_in_inode(struct inode *tmp_inode,
749 FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
750 {
751 loff_t local_size;
752 struct timespec local_mtime;
753
754 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
755 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
756
757 __u32 type = le32_to_cpu(pData->Type);
758 __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
759 __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
760 cifsInfo->time = jiffies;
761 atomic_inc(&cifsInfo->inUse);
762
763 /* save mtime and size */
764 local_mtime = tmp_inode->i_mtime;
765 local_size = tmp_inode->i_size;
766
767 tmp_inode->i_atime =
768 cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
769 tmp_inode->i_mtime =
770 cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
771 tmp_inode->i_ctime =
772 cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
773
774 tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
775 /* since we set the inode type below we need to mask off type
776 to avoid strange results if bits above were corrupt */
777 tmp_inode->i_mode &= ~S_IFMT;
778 if (type == UNIX_FILE) {
779 *pobject_type = DT_REG;
780 tmp_inode->i_mode |= S_IFREG;
781 } else if (type == UNIX_SYMLINK) {
782 *pobject_type = DT_LNK;
783 tmp_inode->i_mode |= S_IFLNK;
784 } else if (type == UNIX_DIR) {
785 *pobject_type = DT_DIR;
786 tmp_inode->i_mode |= S_IFDIR;
787 } else if (type == UNIX_CHARDEV) {
788 *pobject_type = DT_CHR;
789 tmp_inode->i_mode |= S_IFCHR;
790 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
791 le64_to_cpu(pData->DevMinor) & MINORMASK);
792 } else if (type == UNIX_BLOCKDEV) {
793 *pobject_type = DT_BLK;
794 tmp_inode->i_mode |= S_IFBLK;
795 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
796 le64_to_cpu(pData->DevMinor) & MINORMASK);
797 } else if (type == UNIX_FIFO) {
798 *pobject_type = DT_FIFO;
799 tmp_inode->i_mode |= S_IFIFO;
800 } else if (type == UNIX_SOCKET) {
801 *pobject_type = DT_SOCK;
802 tmp_inode->i_mode |= S_IFSOCK;
803 } else {
804 /* safest to just call it a file */
805 *pobject_type = DT_REG;
806 tmp_inode->i_mode |= S_IFREG;
807 cFYI(1,("unknown inode type %d",type));
808 }
809
810 #ifdef CONFIG_CIFS_DEBUG2
811 cFYI(1,("object type: %d", type));
812 #endif
813 tmp_inode->i_uid = le64_to_cpu(pData->Uid);
814 tmp_inode->i_gid = le64_to_cpu(pData->Gid);
815 tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
816
817 spin_lock(&tmp_inode->i_lock);
818 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
819 /* can not safely change the file size here if the
820 client is writing to it due to potential races */
821 i_size_write(tmp_inode, end_of_file);
822
823 /* 512 bytes (2**9) is the fake blocksize that must be used */
824 /* for this calculation, not the real blocksize */
825 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
826 }
827 spin_unlock(&tmp_inode->i_lock);
828
829 if (S_ISREG(tmp_inode->i_mode)) {
830 cFYI(1, ("File inode"));
831 tmp_inode->i_op = &cifs_file_inode_ops;
832
833 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
834 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
835 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
836 else
837 tmp_inode->i_fop = &cifs_file_direct_ops;
838
839 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
840 tmp_inode->i_fop = &cifs_file_nobrl_ops;
841 else
842 tmp_inode->i_fop = &cifs_file_ops;
843
844 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
845 (cifs_sb->tcon->ses->server->maxBuf <
846 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
847 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
848 else
849 tmp_inode->i_data.a_ops = &cifs_addr_ops;
850
851 if(isNewInode)
852 return; /* No sense invalidating pages for new inode since we
853 have not started caching readahead file data yet */
854
855 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
856 (local_size == tmp_inode->i_size)) {
857 cFYI(1, ("inode exists but unchanged"));
858 } else {
859 /* file may have changed on server */
860 cFYI(1, ("invalidate inode, readdir detected change"));
861 invalidate_remote_inode(tmp_inode);
862 }
863 } else if (S_ISDIR(tmp_inode->i_mode)) {
864 cFYI(1, ("Directory inode"));
865 tmp_inode->i_op = &cifs_dir_inode_ops;
866 tmp_inode->i_fop = &cifs_dir_ops;
867 } else if (S_ISLNK(tmp_inode->i_mode)) {
868 cFYI(1, ("Symbolic Link inode"));
869 tmp_inode->i_op = &cifs_symlink_inode_ops;
870 /* tmp_inode->i_fop = *//* do not need to set to anything */
871 } else {
872 cFYI(1, ("Special inode"));
873 init_special_inode(tmp_inode, tmp_inode->i_mode,
874 tmp_inode->i_rdev);
875 }
876 }
877
878 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
879 {
880 int rc = 0;
881 int xid;
882 struct cifs_sb_info *cifs_sb;
883 struct cifsTconInfo *pTcon;
884 char *full_path = NULL;
885 struct inode *newinode = NULL;
886
887 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
888
889 xid = GetXid();
890
891 cifs_sb = CIFS_SB(inode->i_sb);
892 pTcon = cifs_sb->tcon;
893
894 full_path = build_path_from_dentry(direntry);
895 if (full_path == NULL) {
896 FreeXid(xid);
897 return -ENOMEM;
898 }
899
900 if((pTcon->ses->capabilities & CAP_UNIX) &&
901 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
902 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
903 u32 oplock = 0;
904 FILE_UNIX_BASIC_INFO * pInfo =
905 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
906 if(pInfo == NULL) {
907 rc = -ENOMEM;
908 goto mkdir_out;
909 }
910
911 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
912 mode, NULL /* netfid */, pInfo, &oplock,
913 full_path, cifs_sb->local_nls,
914 cifs_sb->mnt_cifs_flags &
915 CIFS_MOUNT_MAP_SPECIAL_CHR);
916 if (rc) {
917 cFYI(1, ("posix mkdir returned 0x%x", rc));
918 d_drop(direntry);
919 } else {
920 int obj_type;
921 if (pInfo->Type == -1) /* no return info - go query */
922 goto mkdir_get_info;
923 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need to set uid/gid */
924 inc_nlink(inode);
925 if (pTcon->nocase)
926 direntry->d_op = &cifs_ci_dentry_ops;
927 else
928 direntry->d_op = &cifs_dentry_ops;
929
930 newinode = new_inode(inode->i_sb);
931 if (newinode == NULL)
932 goto mkdir_get_info;
933 /* Is an i_ino of zero legal? */
934 /* Are there sanity checks we can use to ensure that
935 the server is really filling in that field? */
936 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
937 newinode->i_ino =
938 (unsigned long)pInfo->UniqueId;
939 } /* note ino incremented to unique num in new_inode */
940 if(inode->i_sb->s_flags & MS_NOATIME)
941 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
942 newinode->i_nlink = 2;
943
944 insert_inode_hash(newinode);
945 d_instantiate(direntry, newinode);
946
947 /* we already checked in POSIXCreate whether
948 frame was long enough */
949 posix_fill_in_inode(direntry->d_inode,
950 pInfo, &obj_type, 1 /* NewInode */);
951 #ifdef CONFIG_CIFS_DEBUG2
952 cFYI(1,("instantiated dentry %p %s to inode %p",
953 direntry, direntry->d_name.name, newinode));
954
955 if(newinode->i_nlink != 2)
956 cFYI(1,("unexpected number of links %d",
957 newinode->i_nlink));
958 #endif
959 }
960 kfree(pInfo);
961 goto mkdir_out;
962 }
963
964 /* BB add setting the equivalent of mode via CreateX w/ACLs */
965 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
966 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
967 if (rc) {
968 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
969 d_drop(direntry);
970 } else {
971 mkdir_get_info:
972 inc_nlink(inode);
973 if (pTcon->ses->capabilities & CAP_UNIX)
974 rc = cifs_get_inode_info_unix(&newinode, full_path,
975 inode->i_sb,xid);
976 else
977 rc = cifs_get_inode_info(&newinode, full_path, NULL,
978 inode->i_sb,xid);
979
980 if (pTcon->nocase)
981 direntry->d_op = &cifs_ci_dentry_ops;
982 else
983 direntry->d_op = &cifs_dentry_ops;
984 d_instantiate(direntry, newinode);
985 /* setting nlink not necessary except in cases where we
986 * failed to get it from the server or was set bogus */
987 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
988 direntry->d_inode->i_nlink = 2;
989 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
990 mode &= ~current->fs->umask;
991 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
992 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
993 mode,
994 (__u64)current->fsuid,
995 (__u64)current->fsgid,
996 0 /* dev_t */,
997 cifs_sb->local_nls,
998 cifs_sb->mnt_cifs_flags &
999 CIFS_MOUNT_MAP_SPECIAL_CHR);
1000 } else {
1001 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1002 mode, (__u64)-1,
1003 (__u64)-1, 0 /* dev_t */,
1004 cifs_sb->local_nls,
1005 cifs_sb->mnt_cifs_flags &
1006 CIFS_MOUNT_MAP_SPECIAL_CHR);
1007 }
1008 } else {
1009 /* BB to be implemented via Windows secrty descriptors
1010 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1011 -1, -1, local_nls); */
1012 if(direntry->d_inode) {
1013 direntry->d_inode->i_mode = mode;
1014 direntry->d_inode->i_mode |= S_IFDIR;
1015 if(cifs_sb->mnt_cifs_flags &
1016 CIFS_MOUNT_SET_UID) {
1017 direntry->d_inode->i_uid =
1018 current->fsuid;
1019 direntry->d_inode->i_gid =
1020 current->fsgid;
1021 }
1022 }
1023 }
1024 }
1025 mkdir_out:
1026 kfree(full_path);
1027 FreeXid(xid);
1028 return rc;
1029 }
1030
1031 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1032 {
1033 int rc = 0;
1034 int xid;
1035 struct cifs_sb_info *cifs_sb;
1036 struct cifsTconInfo *pTcon;
1037 char *full_path = NULL;
1038 struct cifsInodeInfo *cifsInode;
1039
1040 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1041
1042 xid = GetXid();
1043
1044 cifs_sb = CIFS_SB(inode->i_sb);
1045 pTcon = cifs_sb->tcon;
1046
1047 full_path = build_path_from_dentry(direntry);
1048 if (full_path == NULL) {
1049 FreeXid(xid);
1050 return -ENOMEM;
1051 }
1052
1053 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1054 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1055
1056 if (!rc) {
1057 drop_nlink(inode);
1058 spin_lock(&direntry->d_inode->i_lock);
1059 i_size_write(direntry->d_inode,0);
1060 clear_nlink(direntry->d_inode);
1061 spin_unlock(&direntry->d_inode->i_lock);
1062 }
1063
1064 cifsInode = CIFS_I(direntry->d_inode);
1065 cifsInode->time = 0; /* force revalidate to go get info when
1066 needed */
1067 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1068 current_fs_time(inode->i_sb);
1069
1070 kfree(full_path);
1071 FreeXid(xid);
1072 return rc;
1073 }
1074
1075 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1076 struct inode *target_inode, struct dentry *target_direntry)
1077 {
1078 char *fromName;
1079 char *toName;
1080 struct cifs_sb_info *cifs_sb_source;
1081 struct cifs_sb_info *cifs_sb_target;
1082 struct cifsTconInfo *pTcon;
1083 int xid;
1084 int rc = 0;
1085
1086 xid = GetXid();
1087
1088 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1089 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1090 pTcon = cifs_sb_source->tcon;
1091
1092 if (pTcon != cifs_sb_target->tcon) {
1093 FreeXid(xid);
1094 return -EXDEV; /* BB actually could be allowed if same server,
1095 but different share.
1096 Might eventually add support for this */
1097 }
1098
1099 /* we already have the rename sem so we do not need to grab it again
1100 here to protect the path integrity */
1101 fromName = build_path_from_dentry(source_direntry);
1102 toName = build_path_from_dentry(target_direntry);
1103 if ((fromName == NULL) || (toName == NULL)) {
1104 rc = -ENOMEM;
1105 goto cifs_rename_exit;
1106 }
1107
1108 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1109 cifs_sb_source->local_nls,
1110 cifs_sb_source->mnt_cifs_flags &
1111 CIFS_MOUNT_MAP_SPECIAL_CHR);
1112 if (rc == -EEXIST) {
1113 /* check if they are the same file because rename of hardlinked
1114 files is a noop */
1115 FILE_UNIX_BASIC_INFO *info_buf_source;
1116 FILE_UNIX_BASIC_INFO *info_buf_target;
1117
1118 info_buf_source =
1119 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1120 if (info_buf_source != NULL) {
1121 info_buf_target = info_buf_source + 1;
1122 if (pTcon->ses->capabilities & CAP_UNIX)
1123 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1124 info_buf_source,
1125 cifs_sb_source->local_nls,
1126 cifs_sb_source->mnt_cifs_flags &
1127 CIFS_MOUNT_MAP_SPECIAL_CHR);
1128 /* else rc is still EEXIST so will fall through to
1129 unlink the target and retry rename */
1130 if (rc == 0) {
1131 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1132 info_buf_target,
1133 cifs_sb_target->local_nls,
1134 /* remap based on source sb */
1135 cifs_sb_source->mnt_cifs_flags &
1136 CIFS_MOUNT_MAP_SPECIAL_CHR);
1137 }
1138 if ((rc == 0) &&
1139 (info_buf_source->UniqueId ==
1140 info_buf_target->UniqueId)) {
1141 /* do not rename since the files are hardlinked which
1142 is a noop */
1143 } else {
1144 /* we either can not tell the files are hardlinked
1145 (as with Windows servers) or files are not
1146 hardlinked so delete the target manually before
1147 renaming to follow POSIX rather than Windows
1148 semantics */
1149 cifs_unlink(target_inode, target_direntry);
1150 rc = CIFSSMBRename(xid, pTcon, fromName,
1151 toName,
1152 cifs_sb_source->local_nls,
1153 cifs_sb_source->mnt_cifs_flags
1154 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1155 }
1156 kfree(info_buf_source);
1157 } /* if we can not get memory just leave rc as EEXIST */
1158 }
1159
1160 if (rc) {
1161 cFYI(1, ("rename rc %d", rc));
1162 }
1163
1164 if ((rc == -EIO) || (rc == -EEXIST)) {
1165 int oplock = FALSE;
1166 __u16 netfid;
1167
1168 /* BB FIXME Is Generic Read correct for rename? */
1169 /* if renaming directory - we should not say CREATE_NOT_DIR,
1170 need to test renaming open directory, also GENERIC_READ
1171 might not right be right access to request */
1172 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1173 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1174 cifs_sb_source->local_nls,
1175 cifs_sb_source->mnt_cifs_flags &
1176 CIFS_MOUNT_MAP_SPECIAL_CHR);
1177 if (rc==0) {
1178 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1179 cifs_sb_source->local_nls,
1180 cifs_sb_source->mnt_cifs_flags &
1181 CIFS_MOUNT_MAP_SPECIAL_CHR);
1182 CIFSSMBClose(xid, pTcon, netfid);
1183 }
1184 }
1185
1186 cifs_rename_exit:
1187 kfree(fromName);
1188 kfree(toName);
1189 FreeXid(xid);
1190 return rc;
1191 }
1192
1193 int cifs_revalidate(struct dentry *direntry)
1194 {
1195 int xid;
1196 int rc = 0;
1197 char *full_path;
1198 struct cifs_sb_info *cifs_sb;
1199 struct cifsInodeInfo *cifsInode;
1200 loff_t local_size;
1201 struct timespec local_mtime;
1202 int invalidate_inode = FALSE;
1203
1204 if (direntry->d_inode == NULL)
1205 return -ENOENT;
1206
1207 cifsInode = CIFS_I(direntry->d_inode);
1208
1209 if (cifsInode == NULL)
1210 return -ENOENT;
1211
1212 /* no sense revalidating inode info on file that no one can write */
1213 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1214 return rc;
1215
1216 xid = GetXid();
1217
1218 cifs_sb = CIFS_SB(direntry->d_sb);
1219
1220 /* can not safely grab the rename sem here if rename calls revalidate
1221 since that would deadlock */
1222 full_path = build_path_from_dentry(direntry);
1223 if (full_path == NULL) {
1224 FreeXid(xid);
1225 return -ENOMEM;
1226 }
1227 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1228 "jiffies %ld", full_path, direntry->d_inode,
1229 direntry->d_inode->i_count.counter, direntry,
1230 direntry->d_time, jiffies));
1231
1232 if (cifsInode->time == 0) {
1233 /* was set to zero previously to force revalidate */
1234 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1235 lookupCacheEnabled) {
1236 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1237 (direntry->d_inode->i_nlink == 1)) {
1238 kfree(full_path);
1239 FreeXid(xid);
1240 return rc;
1241 } else {
1242 cFYI(1, ("Have to revalidate file due to hardlinks"));
1243 }
1244 }
1245
1246 /* save mtime and size */
1247 local_mtime = direntry->d_inode->i_mtime;
1248 local_size = direntry->d_inode->i_size;
1249
1250 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1251 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1252 direntry->d_sb,xid);
1253 if (rc) {
1254 cFYI(1, ("error on getting revalidate info %d", rc));
1255 /* if (rc != -ENOENT)
1256 rc = 0; */ /* BB should we cache info on
1257 certain errors? */
1258 }
1259 } else {
1260 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1261 direntry->d_sb,xid);
1262 if (rc) {
1263 cFYI(1, ("error on getting revalidate info %d", rc));
1264 /* if (rc != -ENOENT)
1265 rc = 0; */ /* BB should we cache info on
1266 certain errors? */
1267 }
1268 }
1269 /* should we remap certain errors, access denied?, to zero */
1270
1271 /* if not oplocked, we invalidate inode pages if mtime or file size
1272 had changed on server */
1273
1274 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1275 (local_size == direntry->d_inode->i_size)) {
1276 cFYI(1, ("cifs_revalidate - inode unchanged"));
1277 } else {
1278 /* file may have changed on server */
1279 if (cifsInode->clientCanCacheRead) {
1280 /* no need to invalidate inode pages since we were the
1281 only ones who could have modified the file and the
1282 server copy is staler than ours */
1283 } else {
1284 invalidate_inode = TRUE;
1285 }
1286 }
1287
1288 /* can not grab this sem since kernel filesys locking documentation
1289 indicates i_mutex may be taken by the kernel on lookup and rename
1290 which could deadlock if we grab the i_mutex here as well */
1291 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1292 /* need to write out dirty pages here */
1293 if (direntry->d_inode->i_mapping) {
1294 /* do we need to lock inode until after invalidate completes
1295 below? */
1296 filemap_fdatawrite(direntry->d_inode->i_mapping);
1297 }
1298 if (invalidate_inode) {
1299 /* shrink_dcache not necessary now that cifs dentry ops
1300 are exported for negative dentries */
1301 /* if(S_ISDIR(direntry->d_inode->i_mode))
1302 shrink_dcache_parent(direntry); */
1303 if (S_ISREG(direntry->d_inode->i_mode)) {
1304 if (direntry->d_inode->i_mapping)
1305 filemap_fdatawait(direntry->d_inode->i_mapping);
1306 /* may eventually have to do this for open files too */
1307 if (list_empty(&(cifsInode->openFileList))) {
1308 /* changed on server - flush read ahead pages */
1309 cFYI(1, ("Invalidating read ahead data on "
1310 "closed file"));
1311 invalidate_remote_inode(direntry->d_inode);
1312 }
1313 }
1314 }
1315 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1316
1317 kfree(full_path);
1318 FreeXid(xid);
1319 return rc;
1320 }
1321
1322 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1323 struct kstat *stat)
1324 {
1325 int err = cifs_revalidate(dentry);
1326 if (!err) {
1327 generic_fillattr(dentry->d_inode, stat);
1328 stat->blksize = CIFS_MAX_MSGSIZE;
1329 }
1330 return err;
1331 }
1332
1333 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1334 {
1335 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1336 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1337 struct page *page;
1338 char *kaddr;
1339 int rc = 0;
1340
1341 page = grab_cache_page(mapping, index);
1342 if (!page)
1343 return -ENOMEM;
1344
1345 kaddr = kmap_atomic(page, KM_USER0);
1346 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1347 flush_dcache_page(page);
1348 kunmap_atomic(kaddr, KM_USER0);
1349 unlock_page(page);
1350 page_cache_release(page);
1351 return rc;
1352 }
1353
1354 static int cifs_vmtruncate(struct inode * inode, loff_t offset)
1355 {
1356 struct address_space *mapping = inode->i_mapping;
1357 unsigned long limit;
1358
1359 spin_lock(&inode->i_lock);
1360 if (inode->i_size < offset)
1361 goto do_expand;
1362 /*
1363 * truncation of in-use swapfiles is disallowed - it would cause
1364 * subsequent swapout to scribble on the now-freed blocks.
1365 */
1366 if (IS_SWAPFILE(inode)) {
1367 spin_unlock(&inode->i_lock);
1368 goto out_busy;
1369 }
1370 i_size_write(inode, offset);
1371 spin_unlock(&inode->i_lock);
1372 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1373 truncate_inode_pages(mapping, offset);
1374 goto out_truncate;
1375
1376 do_expand:
1377 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1378 if (limit != RLIM_INFINITY && offset > limit) {
1379 spin_unlock(&inode->i_lock);
1380 goto out_sig;
1381 }
1382 if (offset > inode->i_sb->s_maxbytes) {
1383 spin_unlock(&inode->i_lock);
1384 goto out_big;
1385 }
1386 i_size_write(inode, offset);
1387 spin_unlock(&inode->i_lock);
1388 out_truncate:
1389 if (inode->i_op && inode->i_op->truncate)
1390 inode->i_op->truncate(inode);
1391 return 0;
1392 out_sig:
1393 send_sig(SIGXFSZ, current, 0);
1394 out_big:
1395 return -EFBIG;
1396 out_busy:
1397 return -ETXTBSY;
1398 }
1399
1400 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1401 {
1402 int xid;
1403 struct cifs_sb_info *cifs_sb;
1404 struct cifsTconInfo *pTcon;
1405 char *full_path = NULL;
1406 int rc = -EACCES;
1407 struct cifsFileInfo *open_file = NULL;
1408 FILE_BASIC_INFO time_buf;
1409 int set_time = FALSE;
1410 int set_dosattr = FALSE;
1411 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1412 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1413 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1414 struct cifsInodeInfo *cifsInode;
1415
1416 xid = GetXid();
1417
1418 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1419 direntry->d_name.name, attrs->ia_valid));
1420
1421 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1422 pTcon = cifs_sb->tcon;
1423
1424 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1425 /* check if we have permission to change attrs */
1426 rc = inode_change_ok(direntry->d_inode, attrs);
1427 if(rc < 0) {
1428 FreeXid(xid);
1429 return rc;
1430 } else
1431 rc = 0;
1432 }
1433
1434 full_path = build_path_from_dentry(direntry);
1435 if (full_path == NULL) {
1436 FreeXid(xid);
1437 return -ENOMEM;
1438 }
1439 cifsInode = CIFS_I(direntry->d_inode);
1440
1441 /* BB check if we need to refresh inode from server now ? BB */
1442
1443 /* need to flush data before changing file size on server */
1444 filemap_write_and_wait(direntry->d_inode->i_mapping);
1445
1446 if (attrs->ia_valid & ATTR_SIZE) {
1447 /* To avoid spurious oplock breaks from server, in the case of
1448 inodes that we already have open, avoid doing path based
1449 setting of file size if we can do it by handle.
1450 This keeps our caching token (oplock) and avoids timeouts
1451 when the local oplock break takes longer to flush
1452 writebehind data than the SMB timeout for the SetPathInfo
1453 request would allow */
1454
1455 open_file = find_writable_file(cifsInode);
1456 if (open_file) {
1457 __u16 nfid = open_file->netfid;
1458 __u32 npid = open_file->pid;
1459 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1460 nfid, npid, FALSE);
1461 atomic_dec(&open_file->wrtPending);
1462 cFYI(1,("SetFSize for attrs rc = %d", rc));
1463 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1464 int bytes_written;
1465 rc = CIFSSMBWrite(xid, pTcon,
1466 nfid, 0, attrs->ia_size,
1467 &bytes_written, NULL, NULL,
1468 1 /* 45 seconds */);
1469 cFYI(1,("Wrt seteof rc %d", rc));
1470 }
1471 } else
1472 rc = -EINVAL;
1473
1474 if (rc != 0) {
1475 /* Set file size by pathname rather than by handle
1476 either because no valid, writeable file handle for
1477 it was found or because there was an error setting
1478 it by handle */
1479 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1480 attrs->ia_size, FALSE,
1481 cifs_sb->local_nls,
1482 cifs_sb->mnt_cifs_flags &
1483 CIFS_MOUNT_MAP_SPECIAL_CHR);
1484 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1485 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1486 __u16 netfid;
1487 int oplock = FALSE;
1488
1489 rc = SMBLegacyOpen(xid, pTcon, full_path,
1490 FILE_OPEN,
1491 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1492 CREATE_NOT_DIR, &netfid, &oplock,
1493 NULL, cifs_sb->local_nls,
1494 cifs_sb->mnt_cifs_flags &
1495 CIFS_MOUNT_MAP_SPECIAL_CHR);
1496 if (rc==0) {
1497 int bytes_written;
1498 rc = CIFSSMBWrite(xid, pTcon,
1499 netfid, 0,
1500 attrs->ia_size,
1501 &bytes_written, NULL,
1502 NULL, 1 /* 45 sec */);
1503 cFYI(1,("wrt seteof rc %d",rc));
1504 CIFSSMBClose(xid, pTcon, netfid);
1505 }
1506
1507 }
1508 }
1509
1510 /* Server is ok setting allocation size implicitly - no need
1511 to call:
1512 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1513 cifs_sb->local_nls);
1514 */
1515
1516 if (rc == 0) {
1517 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1518 cifs_truncate_page(direntry->d_inode->i_mapping,
1519 direntry->d_inode->i_size);
1520 } else
1521 goto cifs_setattr_exit;
1522 }
1523 if (attrs->ia_valid & ATTR_UID) {
1524 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1525 uid = attrs->ia_uid;
1526 }
1527 if (attrs->ia_valid & ATTR_GID) {
1528 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1529 gid = attrs->ia_gid;
1530 }
1531
1532 time_buf.Attributes = 0;
1533 if (attrs->ia_valid & ATTR_MODE) {
1534 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1535 mode = attrs->ia_mode;
1536 }
1537
1538 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1539 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1540 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1541 0 /* dev_t */, cifs_sb->local_nls,
1542 cifs_sb->mnt_cifs_flags &
1543 CIFS_MOUNT_MAP_SPECIAL_CHR);
1544 else if (attrs->ia_valid & ATTR_MODE) {
1545 rc = 0;
1546 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1547 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1548 set_dosattr = TRUE;
1549 time_buf.Attributes =
1550 cpu_to_le32(cifsInode->cifsAttrs |
1551 ATTR_READONLY);
1552 }
1553 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1554 /* If file is readonly on server, we would
1555 not be able to write to it - so if any write
1556 bit is enabled for user or group or other we
1557 need to at least try to remove r/o dos attr */
1558 set_dosattr = TRUE;
1559 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1560 (~ATTR_READONLY));
1561 /* Windows ignores set to zero */
1562 if(time_buf.Attributes == 0)
1563 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1564 }
1565 /* BB to be implemented -
1566 via Windows security descriptors or streams */
1567 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1568 cifs_sb->local_nls); */
1569 }
1570
1571 if (attrs->ia_valid & ATTR_ATIME) {
1572 set_time = TRUE;
1573 time_buf.LastAccessTime =
1574 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1575 } else
1576 time_buf.LastAccessTime = 0;
1577
1578 if (attrs->ia_valid & ATTR_MTIME) {
1579 set_time = TRUE;
1580 time_buf.LastWriteTime =
1581 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1582 } else
1583 time_buf.LastWriteTime = 0;
1584 /* Do not set ctime explicitly unless other time
1585 stamps are changed explicitly (i.e. by utime()
1586 since we would then have a mix of client and
1587 server times */
1588
1589 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1590 set_time = TRUE;
1591 /* Although Samba throws this field away
1592 it may be useful to Windows - but we do
1593 not want to set ctime unless some other
1594 timestamp is changing */
1595 cFYI(1, ("CIFS - CTIME changed"));
1596 time_buf.ChangeTime =
1597 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1598 } else
1599 time_buf.ChangeTime = 0;
1600
1601 if (set_time || set_dosattr) {
1602 time_buf.CreationTime = 0; /* do not change */
1603 /* In the future we should experiment - try setting timestamps
1604 via Handle (SetFileInfo) instead of by path */
1605 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1606 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1607 cifs_sb->local_nls,
1608 cifs_sb->mnt_cifs_flags &
1609 CIFS_MOUNT_MAP_SPECIAL_CHR);
1610 else
1611 rc = -EOPNOTSUPP;
1612
1613 if (rc == -EOPNOTSUPP) {
1614 int oplock = FALSE;
1615 __u16 netfid;
1616
1617 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1618 "times not supported by this server"));
1619 /* BB we could scan to see if we already have it open
1620 and pass in pid of opener to function */
1621 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1622 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1623 CREATE_NOT_DIR, &netfid, &oplock,
1624 NULL, cifs_sb->local_nls,
1625 cifs_sb->mnt_cifs_flags &
1626 CIFS_MOUNT_MAP_SPECIAL_CHR);
1627 if (rc==0) {
1628 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1629 netfid);
1630 CIFSSMBClose(xid, pTcon, netfid);
1631 } else {
1632 /* BB For even older servers we could convert time_buf
1633 into old DOS style which uses two second
1634 granularity */
1635
1636 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1637 &time_buf, cifs_sb->local_nls); */
1638 }
1639 }
1640 /* Even if error on time set, no sense failing the call if
1641 the server would set the time to a reasonable value anyway,
1642 and this check ensures that we are not being called from
1643 sys_utimes in which case we ought to fail the call back to
1644 the user when the server rejects the call */
1645 if((rc) && (attrs->ia_valid &
1646 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1647 rc = 0;
1648 }
1649
1650 /* do not need local check to inode_check_ok since the server does
1651 that */
1652 if (!rc)
1653 rc = inode_setattr(direntry->d_inode, attrs);
1654 cifs_setattr_exit:
1655 kfree(full_path);
1656 FreeXid(xid);
1657 return rc;
1658 }
1659
1660 #if 0
1661 void cifs_delete_inode(struct inode *inode)
1662 {
1663 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1664 /* may have to add back in if and when safe distributed caching of
1665 directories added e.g. via FindNotify */
1666 }
1667 #endif
Linux kernel - Deliverables
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