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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 /* check if server can support readpages */
184 if(pTcon->ses->server->maxBuf <
185 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
186 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
187 else
188 inode->i_data.a_ops = &cifs_addr_ops;
189 } else if (S_ISDIR(inode->i_mode)) {
190 cFYI(1, ("Directory inode"));
191 inode->i_op = &cifs_dir_inode_ops;
192 inode->i_fop = &cifs_dir_ops;
193 } else if (S_ISLNK(inode->i_mode)) {
194 cFYI(1, ("Symbolic Link inode"));
195 inode->i_op = &cifs_symlink_inode_ops;
196 /* tmp_inode->i_fop = */ /* do not need to set to anything */
197 } else {
198 cFYI(1, ("Init special inode"));
199 init_special_inode(inode, inode->i_mode,
200 inode->i_rdev);
201 }
202 }
203 return rc;
204 }
205
206 static int decode_sfu_inode(struct inode * inode, __u64 size,
207 const unsigned char *path,
208 struct cifs_sb_info *cifs_sb, int xid)
209 {
210 int rc;
211 int oplock = FALSE;
212 __u16 netfid;
213 struct cifsTconInfo *pTcon = cifs_sb->tcon;
214 char buf[24];
215 unsigned int bytes_read;
216 char * pbuf;
217
218 pbuf = buf;
219
220 if(size == 0) {
221 inode->i_mode |= S_IFIFO;
222 return 0;
223 } else if (size < 8) {
224 return -EINVAL; /* EOPNOTSUPP? */
225 }
226
227 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
228 CREATE_NOT_DIR, &netfid, &oplock, NULL,
229 cifs_sb->local_nls,
230 cifs_sb->mnt_cifs_flags &
231 CIFS_MOUNT_MAP_SPECIAL_CHR);
232 if (rc==0) {
233 int buf_type = CIFS_NO_BUFFER;
234 /* Read header */
235 rc = CIFSSMBRead(xid, pTcon,
236 netfid,
237 24 /* length */, 0 /* offset */,
238 &bytes_read, &pbuf, &buf_type);
239 if((rc == 0) && (bytes_read >= 8)) {
240 if(memcmp("IntxBLK", pbuf, 8) == 0) {
241 cFYI(1,("Block device"));
242 inode->i_mode |= S_IFBLK;
243 if(bytes_read == 24) {
244 /* we have enough to decode dev num */
245 __u64 mjr; /* major */
246 __u64 mnr; /* minor */
247 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
248 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
249 inode->i_rdev = MKDEV(mjr, mnr);
250 }
251 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
252 cFYI(1,("Char device"));
253 inode->i_mode |= S_IFCHR;
254 if(bytes_read == 24) {
255 /* we have enough to decode dev num */
256 __u64 mjr; /* major */
257 __u64 mnr; /* minor */
258 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
259 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
260 inode->i_rdev = MKDEV(mjr, mnr);
261 }
262 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
263 cFYI(1,("Symlink"));
264 inode->i_mode |= S_IFLNK;
265 } else {
266 inode->i_mode |= S_IFREG; /* file? */
267 rc = -EOPNOTSUPP;
268 }
269 } else {
270 inode->i_mode |= S_IFREG; /* then it is a file */
271 rc = -EOPNOTSUPP; /* or some unknown SFU type */
272 }
273 CIFSSMBClose(xid, pTcon, netfid);
274 }
275 return rc;
276
277 }
278
279 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
280
281 static int get_sfu_uid_mode(struct inode * inode,
282 const unsigned char *path,
283 struct cifs_sb_info *cifs_sb, int xid)
284 {
285 #ifdef CONFIG_CIFS_XATTR
286 ssize_t rc;
287 char ea_value[4];
288 __u32 mode;
289
290 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
291 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
292 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
293 if(rc < 0)
294 return (int)rc;
295 else if (rc > 3) {
296 mode = le32_to_cpu(*((__le32 *)ea_value));
297 inode->i_mode &= ~SFBITS_MASK;
298 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
299 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
300 cFYI(1,("special mode bits 0%o", mode));
301 return 0;
302 } else {
303 return 0;
304 }
305 #else
306 return -EOPNOTSUPP;
307 #endif
308
309
310 }
311
312 int cifs_get_inode_info(struct inode **pinode,
313 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
314 struct super_block *sb, int xid)
315 {
316 int rc = 0;
317 struct cifsTconInfo *pTcon;
318 struct inode *inode;
319 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
320 char *tmp_path;
321 char *buf = NULL;
322
323 pTcon = cifs_sb->tcon;
324 cFYI(1,("Getting info on %s", search_path));
325
326 if ((pfindData == NULL) && (*pinode != NULL)) {
327 if (CIFS_I(*pinode)->clientCanCacheRead) {
328 cFYI(1,("No need to revalidate cached inode sizes"));
329 return rc;
330 }
331 }
332
333 /* if file info not passed in then get it from server */
334 if (pfindData == NULL) {
335 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
336 if (buf == NULL)
337 return -ENOMEM;
338 pfindData = (FILE_ALL_INFO *)buf;
339 /* could do find first instead but this returns more info */
340 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
341 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
342 CIFS_MOUNT_MAP_SPECIAL_CHR);
343 /* BB optimize code so we do not make the above call
344 when server claims no NT SMB support and the above call
345 failed at least once - set flag in tcon or mount */
346 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
347 rc = SMBQueryInformation(xid, pTcon, search_path,
348 pfindData, cifs_sb->local_nls,
349 cifs_sb->mnt_cifs_flags &
350 CIFS_MOUNT_MAP_SPECIAL_CHR);
351 }
352
353 }
354 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
355 if (rc) {
356 if (rc == -EREMOTE) {
357 tmp_path =
358 kmalloc(strnlen
359 (pTcon->treeName,
360 MAX_TREE_SIZE + 1) +
361 strnlen(search_path, MAX_PATHCONF) + 1,
362 GFP_KERNEL);
363 if (tmp_path == NULL) {
364 kfree(buf);
365 return -ENOMEM;
366 }
367
368 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
369 strncat(tmp_path, search_path, MAX_PATHCONF);
370 rc = connect_to_dfs_path(xid, pTcon->ses,
371 /* treename + */ tmp_path,
372 cifs_sb->local_nls,
373 cifs_sb->mnt_cifs_flags &
374 CIFS_MOUNT_MAP_SPECIAL_CHR);
375 kfree(tmp_path);
376 /* BB fix up inode etc. */
377 } else if (rc) {
378 kfree(buf);
379 return rc;
380 }
381 } else {
382 struct cifsInodeInfo *cifsInfo;
383 __u32 attr = le32_to_cpu(pfindData->Attributes);
384
385 /* get new inode */
386 if (*pinode == NULL) {
387 *pinode = new_inode(sb);
388 if (*pinode == NULL)
389 return -ENOMEM;
390 /* Is an i_ino of zero legal? Can we use that to check
391 if the server supports returning inode numbers? Are
392 there other sanity checks we can use to ensure that
393 the server is really filling in that field? */
394
395 /* We can not use the IndexNumber field by default from
396 Windows or Samba (in ALL_INFO buf) but we can request
397 it explicitly. It may not be unique presumably if
398 the server has multiple devices mounted under one
399 share */
400
401 /* There may be higher info levels that work but are
402 there Windows server or network appliances for which
403 IndexNumber field is not guaranteed unique? */
404
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
406 int rc1 = 0;
407 __u64 inode_num;
408
409 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
410 search_path, &inode_num,
411 cifs_sb->local_nls,
412 cifs_sb->mnt_cifs_flags &
413 CIFS_MOUNT_MAP_SPECIAL_CHR);
414 if (rc1) {
415 cFYI(1,("GetSrvInodeNum rc %d", rc1));
416 /* BB EOPNOSUPP disable SERVER_INUM? */
417 } else /* do we need cast or hash to ino? */
418 (*pinode)->i_ino = inode_num;
419 } /* else ino incremented to unique num in new_inode*/
420 insert_inode_hash(*pinode);
421 }
422 inode = *pinode;
423 cifsInfo = CIFS_I(inode);
424 cifsInfo->cifsAttrs = attr;
425 cFYI(1, ("Old time %ld", cifsInfo->time));
426 cifsInfo->time = jiffies;
427 cFYI(1, ("New time %ld", cifsInfo->time));
428
429 /* blksize needs to be multiple of two. So safer to default to
430 blksize and blkbits set in superblock so 2**blkbits and blksize
431 will match rather than setting to:
432 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
433
434 /* Linux can not store file creation time so ignore it */
435 inode->i_atime =
436 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
437 inode->i_mtime =
438 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
439 inode->i_ctime =
440 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
441 cFYI(0, ("Attributes came in as 0x%x", attr));
442
443 /* set default mode. will override for dirs below */
444 if (atomic_read(&cifsInfo->inUse) == 0)
445 /* new inode, can safely set these fields */
446 inode->i_mode = cifs_sb->mnt_file_mode;
447 else /* since we set the inode type below we need to mask off
448 to avoid strange results if type changes and both get orred in */
449 inode->i_mode &= ~S_IFMT;
450 /* if (attr & ATTR_REPARSE) */
451 /* We no longer handle these as symlinks because we could not
452 follow them due to the absolute path with drive letter */
453 if (attr & ATTR_DIRECTORY) {
454 /* override default perms since we do not do byte range locking
455 on dirs */
456 inode->i_mode = cifs_sb->mnt_dir_mode;
457 inode->i_mode |= S_IFDIR;
458 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
459 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
460 /* No need to le64 convert size of zero */
461 (pfindData->EndOfFile == 0)) {
462 inode->i_mode = cifs_sb->mnt_file_mode;
463 inode->i_mode |= S_IFIFO;
464 /* BB Finish for SFU style symlinks and devices */
465 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
466 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
467 if (decode_sfu_inode(inode,
468 le64_to_cpu(pfindData->EndOfFile),
469 search_path,
470 cifs_sb, xid)) {
471 cFYI(1,("Unrecognized sfu inode type"));
472 }
473 cFYI(1,("sfu mode 0%o",inode->i_mode));
474 } else {
475 inode->i_mode |= S_IFREG;
476 /* treat the dos attribute of read-only as read-only
477 mode e.g. 555 */
478 if (cifsInfo->cifsAttrs & ATTR_READONLY)
479 inode->i_mode &= ~(S_IWUGO);
480 /* BB add code here -
481 validate if device or weird share or device type? */
482 }
483 if (is_size_safe_to_change(cifsInfo)) {
484 /* can not safely change the file size here if the
485 client is writing to it due to potential races */
486 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
487
488 /* 512 bytes (2**9) is the fake blocksize that must be
489 used for this calculation */
490 inode->i_blocks = (512 - 1 + le64_to_cpu(
491 pfindData->AllocationSize)) >> 9;
492 }
493
494 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
495
496 /* BB fill in uid and gid here? with help from winbind?
497 or retrieve from NTFS stream extended attribute */
498 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
499 /* fill in uid, gid, mode from server ACL */
500 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
501 } else if (atomic_read(&cifsInfo->inUse) == 0) {
502 inode->i_uid = cifs_sb->mnt_uid;
503 inode->i_gid = cifs_sb->mnt_gid;
504 /* set so we do not keep refreshing these fields with
505 bad data after user has changed them in memory */
506 atomic_set(&cifsInfo->inUse,1);
507 }
508
509 if (S_ISREG(inode->i_mode)) {
510 cFYI(1, ("File inode"));
511 inode->i_op = &cifs_file_inode_ops;
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
513 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
514 inode->i_fop =
515 &cifs_file_direct_nobrl_ops;
516 else
517 inode->i_fop = &cifs_file_direct_ops;
518 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
519 inode->i_fop = &cifs_file_nobrl_ops;
520 else /* not direct, send byte range locks */
521 inode->i_fop = &cifs_file_ops;
522
523 if(pTcon->ses->server->maxBuf <
524 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
526 else
527 inode->i_data.a_ops = &cifs_addr_ops;
528 } else if (S_ISDIR(inode->i_mode)) {
529 cFYI(1, ("Directory inode"));
530 inode->i_op = &cifs_dir_inode_ops;
531 inode->i_fop = &cifs_dir_ops;
532 } else if (S_ISLNK(inode->i_mode)) {
533 cFYI(1, ("Symbolic Link inode"));
534 inode->i_op = &cifs_symlink_inode_ops;
535 } else {
536 init_special_inode(inode, inode->i_mode,
537 inode->i_rdev);
538 }
539 }
540 kfree(buf);
541 return rc;
542 }
543
544 /* gets root inode */
545 void cifs_read_inode(struct inode *inode)
546 {
547 int xid;
548 struct cifs_sb_info *cifs_sb;
549
550 cifs_sb = CIFS_SB(inode->i_sb);
551 xid = GetXid();
552 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
553 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
554 else
555 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
556 /* can not call macro FreeXid here since in a void func */
557 _FreeXid(xid);
558 }
559
560 int cifs_unlink(struct inode *inode, struct dentry *direntry)
561 {
562 int rc = 0;
563 int xid;
564 struct cifs_sb_info *cifs_sb;
565 struct cifsTconInfo *pTcon;
566 char *full_path = NULL;
567 struct cifsInodeInfo *cifsInode;
568 FILE_BASIC_INFO *pinfo_buf;
569
570 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
571
572 xid = GetXid();
573
574 if(inode)
575 cifs_sb = CIFS_SB(inode->i_sb);
576 else
577 cifs_sb = CIFS_SB(direntry->d_sb);
578 pTcon = cifs_sb->tcon;
579
580 /* Unlink can be called from rename so we can not grab the sem here
581 since we deadlock otherwise */
582 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
583 full_path = build_path_from_dentry(direntry);
584 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
585 if (full_path == NULL) {
586 FreeXid(xid);
587 return -ENOMEM;
588 }
589 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
590 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
591
592 if (!rc) {
593 if (direntry->d_inode)
594 direntry->d_inode->i_nlink--;
595 } else if (rc == -ENOENT) {
596 d_drop(direntry);
597 } else if (rc == -ETXTBSY) {
598 int oplock = FALSE;
599 __u16 netfid;
600
601 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
602 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
603 &netfid, &oplock, NULL, cifs_sb->local_nls,
604 cifs_sb->mnt_cifs_flags &
605 CIFS_MOUNT_MAP_SPECIAL_CHR);
606 if (rc==0) {
607 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
608 cifs_sb->local_nls,
609 cifs_sb->mnt_cifs_flags &
610 CIFS_MOUNT_MAP_SPECIAL_CHR);
611 CIFSSMBClose(xid, pTcon, netfid);
612 if (direntry->d_inode)
613 direntry->d_inode->i_nlink--;
614 }
615 } else if (rc == -EACCES) {
616 /* try only if r/o attribute set in local lookup data? */
617 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
618 if (pinfo_buf) {
619 /* ATTRS set to normal clears r/o bit */
620 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
621 if (!(pTcon->ses->flags & CIFS_SES_NT4))
622 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
623 pinfo_buf,
624 cifs_sb->local_nls,
625 cifs_sb->mnt_cifs_flags &
626 CIFS_MOUNT_MAP_SPECIAL_CHR);
627 else
628 rc = -EOPNOTSUPP;
629
630 if (rc == -EOPNOTSUPP) {
631 int oplock = FALSE;
632 __u16 netfid;
633 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
634 full_path,
635 (__u16)ATTR_NORMAL,
636 cifs_sb->local_nls);
637 For some strange reason it seems that NT4 eats the
638 old setattr call without actually setting the
639 attributes so on to the third attempted workaround
640 */
641
642 /* BB could scan to see if we already have it open
643 and pass in pid of opener to function */
644 rc = CIFSSMBOpen(xid, pTcon, full_path,
645 FILE_OPEN, SYNCHRONIZE |
646 FILE_WRITE_ATTRIBUTES, 0,
647 &netfid, &oplock, NULL,
648 cifs_sb->local_nls,
649 cifs_sb->mnt_cifs_flags &
650 CIFS_MOUNT_MAP_SPECIAL_CHR);
651 if (rc==0) {
652 rc = CIFSSMBSetFileTimes(xid, pTcon,
653 pinfo_buf,
654 netfid);
655 CIFSSMBClose(xid, pTcon, netfid);
656 }
657 }
658 kfree(pinfo_buf);
659 }
660 if (rc==0) {
661 rc = CIFSSMBDelFile(xid, pTcon, full_path,
662 cifs_sb->local_nls,
663 cifs_sb->mnt_cifs_flags &
664 CIFS_MOUNT_MAP_SPECIAL_CHR);
665 if (!rc) {
666 if (direntry->d_inode)
667 direntry->d_inode->i_nlink--;
668 } else if (rc == -ETXTBSY) {
669 int oplock = FALSE;
670 __u16 netfid;
671
672 rc = CIFSSMBOpen(xid, pTcon, full_path,
673 FILE_OPEN, DELETE,
674 CREATE_NOT_DIR |
675 CREATE_DELETE_ON_CLOSE,
676 &netfid, &oplock, NULL,
677 cifs_sb->local_nls,
678 cifs_sb->mnt_cifs_flags &
679 CIFS_MOUNT_MAP_SPECIAL_CHR);
680 if (rc==0) {
681 CIFSSMBRenameOpenFile(xid, pTcon,
682 netfid, NULL,
683 cifs_sb->local_nls,
684 cifs_sb->mnt_cifs_flags &
685 CIFS_MOUNT_MAP_SPECIAL_CHR);
686 CIFSSMBClose(xid, pTcon, netfid);
687 if (direntry->d_inode)
688 direntry->d_inode->i_nlink--;
689 }
690 /* BB if rc = -ETXTBUSY goto the rename logic BB */
691 }
692 }
693 }
694 if (direntry->d_inode) {
695 cifsInode = CIFS_I(direntry->d_inode);
696 cifsInode->time = 0; /* will force revalidate to get info
697 when needed */
698 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
699 }
700 if(inode) {
701 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
702 cifsInode = CIFS_I(inode);
703 cifsInode->time = 0; /* force revalidate of dir as well */
704 }
705
706 kfree(full_path);
707 FreeXid(xid);
708 return rc;
709 }
710
711 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
712 {
713 int rc = 0;
714 int xid;
715 struct cifs_sb_info *cifs_sb;
716 struct cifsTconInfo *pTcon;
717 char *full_path = NULL;
718 struct inode *newinode = NULL;
719
720 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
721
722 xid = GetXid();
723
724 cifs_sb = CIFS_SB(inode->i_sb);
725 pTcon = cifs_sb->tcon;
726
727 full_path = build_path_from_dentry(direntry);
728 if (full_path == NULL) {
729 FreeXid(xid);
730 return -ENOMEM;
731 }
732 /* BB add setting the equivalent of mode via CreateX w/ACLs */
733 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
734 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
735 if (rc) {
736 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
737 d_drop(direntry);
738 } else {
739 inode->i_nlink++;
740 if (pTcon->ses->capabilities & CAP_UNIX)
741 rc = cifs_get_inode_info_unix(&newinode, full_path,
742 inode->i_sb,xid);
743 else
744 rc = cifs_get_inode_info(&newinode, full_path, NULL,
745 inode->i_sb,xid);
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", inode));
804
805 xid = GetXid();
806
807 cifs_sb = CIFS_SB(inode->i_sb);
808 pTcon = cifs_sb->tcon;
809
810 full_path = build_path_from_dentry(direntry);
811 if (full_path == NULL) {
812 FreeXid(xid);
813 return -ENOMEM;
814 }
815
816 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
817 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
818
819 if (!rc) {
820 inode->i_nlink--;
821 i_size_write(direntry->d_inode,0);
822 direntry->d_inode->i_nlink = 0;
823 }
824
825 cifsInode = CIFS_I(direntry->d_inode);
826 cifsInode->time = 0; /* force revalidate to go get info when
827 needed */
828 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
829 current_fs_time(inode->i_sb);
830
831 kfree(full_path);
832 FreeXid(xid);
833 return rc;
834 }
835
836 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
837 struct inode *target_inode, struct dentry *target_direntry)
838 {
839 char *fromName;
840 char *toName;
841 struct cifs_sb_info *cifs_sb_source;
842 struct cifs_sb_info *cifs_sb_target;
843 struct cifsTconInfo *pTcon;
844 int xid;
845 int rc = 0;
846
847 xid = GetXid();
848
849 cifs_sb_target = CIFS_SB(target_inode->i_sb);
850 cifs_sb_source = CIFS_SB(source_inode->i_sb);
851 pTcon = cifs_sb_source->tcon;
852
853 if (pTcon != cifs_sb_target->tcon) {
854 FreeXid(xid);
855 return -EXDEV; /* BB actually could be allowed if same server,
856 but different share.
857 Might eventually add support for this */
858 }
859
860 /* we already have the rename sem so we do not need to grab it again
861 here to protect the path integrity */
862 fromName = build_path_from_dentry(source_direntry);
863 toName = build_path_from_dentry(target_direntry);
864 if ((fromName == NULL) || (toName == NULL)) {
865 rc = -ENOMEM;
866 goto cifs_rename_exit;
867 }
868
869 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
870 cifs_sb_source->local_nls,
871 cifs_sb_source->mnt_cifs_flags &
872 CIFS_MOUNT_MAP_SPECIAL_CHR);
873 if (rc == -EEXIST) {
874 /* check if they are the same file because rename of hardlinked
875 files is a noop */
876 FILE_UNIX_BASIC_INFO *info_buf_source;
877 FILE_UNIX_BASIC_INFO *info_buf_target;
878
879 info_buf_source =
880 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
881 if (info_buf_source != NULL) {
882 info_buf_target = info_buf_source + 1;
883 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
884 info_buf_source, cifs_sb_source->local_nls,
885 cifs_sb_source->mnt_cifs_flags &
886 CIFS_MOUNT_MAP_SPECIAL_CHR);
887 if (rc == 0) {
888 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
889 info_buf_target,
890 cifs_sb_target->local_nls,
891 /* remap based on source sb */
892 cifs_sb_source->mnt_cifs_flags &
893 CIFS_MOUNT_MAP_SPECIAL_CHR);
894 }
895 if ((rc == 0) &&
896 (info_buf_source->UniqueId ==
897 info_buf_target->UniqueId)) {
898 /* do not rename since the files are hardlinked which
899 is a noop */
900 } else {
901 /* we either can not tell the files are hardlinked
902 (as with Windows servers) or files are not
903 hardlinked so delete the target manually before
904 renaming to follow POSIX rather than Windows
905 semantics */
906 cifs_unlink(target_inode, target_direntry);
907 rc = CIFSSMBRename(xid, pTcon, fromName,
908 toName,
909 cifs_sb_source->local_nls,
910 cifs_sb_source->mnt_cifs_flags
911 & CIFS_MOUNT_MAP_SPECIAL_CHR);
912 }
913 kfree(info_buf_source);
914 } /* if we can not get memory just leave rc as EEXIST */
915 }
916
917 if (rc) {
918 cFYI(1, ("rename rc %d", rc));
919 }
920
921 if ((rc == -EIO) || (rc == -EEXIST)) {
922 int oplock = FALSE;
923 __u16 netfid;
924
925 /* BB FIXME Is Generic Read correct for rename? */
926 /* if renaming directory - we should not say CREATE_NOT_DIR,
927 need to test renaming open directory, also GENERIC_READ
928 might not right be right access to request */
929 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
930 CREATE_NOT_DIR, &netfid, &oplock, NULL,
931 cifs_sb_source->local_nls,
932 cifs_sb_source->mnt_cifs_flags &
933 CIFS_MOUNT_MAP_SPECIAL_CHR);
934 if (rc==0) {
935 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
936 cifs_sb_source->local_nls,
937 cifs_sb_source->mnt_cifs_flags &
938 CIFS_MOUNT_MAP_SPECIAL_CHR);
939 CIFSSMBClose(xid, pTcon, netfid);
940 }
941 }
942
943 cifs_rename_exit:
944 kfree(fromName);
945 kfree(toName);
946 FreeXid(xid);
947 return rc;
948 }
949
950 int cifs_revalidate(struct dentry *direntry)
951 {
952 int xid;
953 int rc = 0;
954 char *full_path;
955 struct cifs_sb_info *cifs_sb;
956 struct cifsInodeInfo *cifsInode;
957 loff_t local_size;
958 struct timespec local_mtime;
959 int invalidate_inode = FALSE;
960
961 if (direntry->d_inode == NULL)
962 return -ENOENT;
963
964 cifsInode = CIFS_I(direntry->d_inode);
965
966 if (cifsInode == NULL)
967 return -ENOENT;
968
969 /* no sense revalidating inode info on file that no one can write */
970 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
971 return rc;
972
973 xid = GetXid();
974
975 cifs_sb = CIFS_SB(direntry->d_sb);
976
977 /* can not safely grab the rename sem here if rename calls revalidate
978 since that would deadlock */
979 full_path = build_path_from_dentry(direntry);
980 if (full_path == NULL) {
981 FreeXid(xid);
982 return -ENOMEM;
983 }
984 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
985 "jiffies %ld", full_path, direntry->d_inode,
986 direntry->d_inode->i_count.counter, direntry,
987 direntry->d_time, jiffies));
988
989 if (cifsInode->time == 0) {
990 /* was set to zero previously to force revalidate */
991 } else if (time_before(jiffies, cifsInode->time + HZ) &&
992 lookupCacheEnabled) {
993 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
994 (direntry->d_inode->i_nlink == 1)) {
995 kfree(full_path);
996 FreeXid(xid);
997 return rc;
998 } else {
999 cFYI(1, ("Have to revalidate file due to hardlinks"));
1000 }
1001 }
1002
1003 /* save mtime and size */
1004 local_mtime = direntry->d_inode->i_mtime;
1005 local_size = direntry->d_inode->i_size;
1006
1007 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1008 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1009 direntry->d_sb,xid);
1010 if (rc) {
1011 cFYI(1, ("error on getting revalidate info %d", rc));
1012 /* if (rc != -ENOENT)
1013 rc = 0; */ /* BB should we cache info on
1014 certain errors? */
1015 }
1016 } else {
1017 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1018 direntry->d_sb,xid);
1019 if (rc) {
1020 cFYI(1, ("error on getting revalidate info %d", rc));
1021 /* if (rc != -ENOENT)
1022 rc = 0; */ /* BB should we cache info on
1023 certain errors? */
1024 }
1025 }
1026 /* should we remap certain errors, access denied?, to zero */
1027
1028 /* if not oplocked, we invalidate inode pages if mtime or file size
1029 had changed on server */
1030
1031 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1032 (local_size == direntry->d_inode->i_size)) {
1033 cFYI(1, ("cifs_revalidate - inode unchanged"));
1034 } else {
1035 /* file may have changed on server */
1036 if (cifsInode->clientCanCacheRead) {
1037 /* no need to invalidate inode pages since we were the
1038 only ones who could have modified the file and the
1039 server copy is staler than ours */
1040 } else {
1041 invalidate_inode = TRUE;
1042 }
1043 }
1044
1045 /* can not grab this sem since kernel filesys locking documentation
1046 indicates i_mutex may be taken by the kernel on lookup and rename
1047 which could deadlock if we grab the i_mutex here as well */
1048 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1049 /* need to write out dirty pages here */
1050 if (direntry->d_inode->i_mapping) {
1051 /* do we need to lock inode until after invalidate completes
1052 below? */
1053 filemap_fdatawrite(direntry->d_inode->i_mapping);
1054 }
1055 if (invalidate_inode) {
1056 /* shrink_dcache not necessary now that cifs dentry ops
1057 are exported for negative dentries */
1058 /* if(S_ISDIR(direntry->d_inode->i_mode))
1059 shrink_dcache_parent(direntry); */
1060 if (S_ISREG(direntry->d_inode->i_mode)) {
1061 if (direntry->d_inode->i_mapping)
1062 filemap_fdatawait(direntry->d_inode->i_mapping);
1063 /* may eventually have to do this for open files too */
1064 if (list_empty(&(cifsInode->openFileList))) {
1065 /* changed on server - flush read ahead pages */
1066 cFYI(1, ("Invalidating read ahead data on "
1067 "closed file"));
1068 invalidate_remote_inode(direntry->d_inode);
1069 }
1070 }
1071 }
1072 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1073
1074 kfree(full_path);
1075 FreeXid(xid);
1076 return rc;
1077 }
1078
1079 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1080 struct kstat *stat)
1081 {
1082 int err = cifs_revalidate(dentry);
1083 if (!err)
1084 generic_fillattr(dentry->d_inode, stat);
1085 return err;
1086 }
1087
1088 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1089 {
1090 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1091 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1092 struct page *page;
1093 char *kaddr;
1094 int rc = 0;
1095
1096 page = grab_cache_page(mapping, index);
1097 if (!page)
1098 return -ENOMEM;
1099
1100 kaddr = kmap_atomic(page, KM_USER0);
1101 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1102 flush_dcache_page(page);
1103 kunmap_atomic(kaddr, KM_USER0);
1104 unlock_page(page);
1105 page_cache_release(page);
1106 return rc;
1107 }
1108
1109 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1110 {
1111 int xid;
1112 struct cifs_sb_info *cifs_sb;
1113 struct cifsTconInfo *pTcon;
1114 char *full_path = NULL;
1115 int rc = -EACCES;
1116 struct cifsFileInfo *open_file = NULL;
1117 FILE_BASIC_INFO time_buf;
1118 int set_time = FALSE;
1119 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1120 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1121 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1122 struct cifsInodeInfo *cifsInode;
1123
1124 xid = GetXid();
1125
1126 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1127 direntry->d_name.name, attrs->ia_valid));
1128
1129 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1130 pTcon = cifs_sb->tcon;
1131
1132 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1133 /* check if we have permission to change attrs */
1134 rc = inode_change_ok(direntry->d_inode, attrs);
1135 if(rc < 0) {
1136 FreeXid(xid);
1137 return rc;
1138 } else
1139 rc = 0;
1140 }
1141
1142 full_path = build_path_from_dentry(direntry);
1143 if (full_path == NULL) {
1144 FreeXid(xid);
1145 return -ENOMEM;
1146 }
1147 cifsInode = CIFS_I(direntry->d_inode);
1148
1149 /* BB check if we need to refresh inode from server now ? BB */
1150
1151 /* need to flush data before changing file size on server */
1152 filemap_write_and_wait(direntry->d_inode->i_mapping);
1153
1154 if (attrs->ia_valid & ATTR_SIZE) {
1155 /* To avoid spurious oplock breaks from server, in the case of
1156 inodes that we already have open, avoid doing path based
1157 setting of file size if we can do it by handle.
1158 This keeps our caching token (oplock) and avoids timeouts
1159 when the local oplock break takes longer to flush
1160 writebehind data than the SMB timeout for the SetPathInfo
1161 request would allow */
1162
1163 open_file = find_writable_file(cifsInode);
1164 if (open_file) {
1165 __u16 nfid = open_file->netfid;
1166 __u32 npid = open_file->pid;
1167 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1168 nfid, npid, FALSE);
1169 atomic_dec(&open_file->wrtPending);
1170 cFYI(1,("SetFSize for attrs rc = %d", rc));
1171 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1172 int bytes_written;
1173 rc = CIFSSMBWrite(xid, pTcon,
1174 nfid, 0, attrs->ia_size,
1175 &bytes_written, NULL, NULL,
1176 1 /* 45 seconds */);
1177 cFYI(1,("Wrt seteof rc %d", rc));
1178 }
1179 } else
1180 rc = -EINVAL;
1181
1182 if (rc != 0) {
1183 /* Set file size by pathname rather than by handle
1184 either because no valid, writeable file handle for
1185 it was found or because there was an error setting
1186 it by handle */
1187 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1188 attrs->ia_size, FALSE,
1189 cifs_sb->local_nls,
1190 cifs_sb->mnt_cifs_flags &
1191 CIFS_MOUNT_MAP_SPECIAL_CHR);
1192 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1193 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1194 __u16 netfid;
1195 int oplock = FALSE;
1196
1197 rc = SMBLegacyOpen(xid, pTcon, full_path,
1198 FILE_OPEN,
1199 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1200 CREATE_NOT_DIR, &netfid, &oplock,
1201 NULL, cifs_sb->local_nls,
1202 cifs_sb->mnt_cifs_flags &
1203 CIFS_MOUNT_MAP_SPECIAL_CHR);
1204 if (rc==0) {
1205 int bytes_written;
1206 rc = CIFSSMBWrite(xid, pTcon,
1207 netfid, 0,
1208 attrs->ia_size,
1209 &bytes_written, NULL,
1210 NULL, 1 /* 45 sec */);
1211 cFYI(1,("wrt seteof rc %d",rc));
1212 CIFSSMBClose(xid, pTcon, netfid);
1213 }
1214
1215 }
1216 }
1217
1218 /* Server is ok setting allocation size implicitly - no need
1219 to call:
1220 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1221 cifs_sb->local_nls);
1222 */
1223
1224 if (rc == 0) {
1225 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1226 cifs_truncate_page(direntry->d_inode->i_mapping,
1227 direntry->d_inode->i_size);
1228 } else
1229 goto cifs_setattr_exit;
1230 }
1231 if (attrs->ia_valid & ATTR_UID) {
1232 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1233 uid = attrs->ia_uid;
1234 }
1235 if (attrs->ia_valid & ATTR_GID) {
1236 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1237 gid = attrs->ia_gid;
1238 }
1239
1240 time_buf.Attributes = 0;
1241 if (attrs->ia_valid & ATTR_MODE) {
1242 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1243 mode = attrs->ia_mode;
1244 }
1245
1246 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1247 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1248 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1249 0 /* dev_t */, cifs_sb->local_nls,
1250 cifs_sb->mnt_cifs_flags &
1251 CIFS_MOUNT_MAP_SPECIAL_CHR);
1252 else if (attrs->ia_valid & ATTR_MODE) {
1253 rc = 0;
1254 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1255 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1256 time_buf.Attributes =
1257 cpu_to_le32(cifsInode->cifsAttrs |
1258 ATTR_READONLY);
1259 } else if ((mode & S_IWUGO) == S_IWUGO) {
1260 if (cifsInode->cifsAttrs & ATTR_READONLY)
1261 time_buf.Attributes =
1262 cpu_to_le32(cifsInode->cifsAttrs &
1263 (~ATTR_READONLY));
1264 }
1265 /* BB to be implemented -
1266 via Windows security descriptors or streams */
1267 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1268 cifs_sb->local_nls); */
1269 }
1270
1271 if (attrs->ia_valid & ATTR_ATIME) {
1272 set_time = TRUE;
1273 time_buf.LastAccessTime =
1274 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1275 } else
1276 time_buf.LastAccessTime = 0;
1277
1278 if (attrs->ia_valid & ATTR_MTIME) {
1279 set_time = TRUE;
1280 time_buf.LastWriteTime =
1281 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1282 } else
1283 time_buf.LastWriteTime = 0;
1284 /* Do not set ctime explicitly unless other time
1285 stamps are changed explicitly (i.e. by utime()
1286 since we would then have a mix of client and
1287 server times */
1288
1289 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1290 set_time = TRUE;
1291 /* Although Samba throws this field away
1292 it may be useful to Windows - but we do
1293 not want to set ctime unless some other
1294 timestamp is changing */
1295 cFYI(1, ("CIFS - CTIME changed"));
1296 time_buf.ChangeTime =
1297 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1298 } else
1299 time_buf.ChangeTime = 0;
1300
1301 if (set_time || time_buf.Attributes) {
1302 time_buf.CreationTime = 0; /* do not change */
1303 /* In the future we should experiment - try setting timestamps
1304 via Handle (SetFileInfo) instead of by path */
1305 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1306 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1307 cifs_sb->local_nls,
1308 cifs_sb->mnt_cifs_flags &
1309 CIFS_MOUNT_MAP_SPECIAL_CHR);
1310 else
1311 rc = -EOPNOTSUPP;
1312
1313 if (rc == -EOPNOTSUPP) {
1314 int oplock = FALSE;
1315 __u16 netfid;
1316
1317 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1318 "times not supported by this server"));
1319 /* BB we could scan to see if we already have it open
1320 and pass in pid of opener to function */
1321 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1322 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1323 CREATE_NOT_DIR, &netfid, &oplock,
1324 NULL, cifs_sb->local_nls,
1325 cifs_sb->mnt_cifs_flags &
1326 CIFS_MOUNT_MAP_SPECIAL_CHR);
1327 if (rc==0) {
1328 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1329 netfid);
1330 CIFSSMBClose(xid, pTcon, netfid);
1331 } else {
1332 /* BB For even older servers we could convert time_buf
1333 into old DOS style which uses two second
1334 granularity */
1335
1336 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1337 &time_buf, cifs_sb->local_nls); */
1338 }
1339 }
1340 /* Even if error on time set, no sense failing the call if
1341 the server would set the time to a reasonable value anyway,
1342 and this check ensures that we are not being called from
1343 sys_utimes in which case we ought to fail the call back to
1344 the user when the server rejects the call */
1345 if((rc) && (attrs->ia_valid &&
1346 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1347 rc = 0;
1348 }
1349
1350 /* do not need local check to inode_check_ok since the server does
1351 that */
1352 if (!rc)
1353 rc = inode_setattr(direntry->d_inode, attrs);
1354 cifs_setattr_exit:
1355 kfree(full_path);
1356 FreeXid(xid);
1357 return rc;
1358 }
1359
1360 void cifs_delete_inode(struct inode *inode)
1361 {
1362 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1363 /* may have to add back in if and when safe distributed caching of
1364 directories added e.g. via FindNotify */
1365 }
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