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[CIFS] use common code for turning off ATTR_READONLY in cifs_unlink
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / cifs / inode.c
blob8dbc7c90309c0e6089bb765ec1d68e1c05f568fa
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
33 static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
34 {
35 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
36
37 switch (inode->i_mode & S_IFMT) {
38 case S_IFREG:
39 inode->i_op = &cifs_file_inode_ops;
40 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
41 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
42 inode->i_fop = &cifs_file_direct_nobrl_ops;
43 else
44 inode->i_fop = &cifs_file_direct_ops;
45 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
46 inode->i_fop = &cifs_file_nobrl_ops;
47 else { /* not direct, send byte range locks */
48 inode->i_fop = &cifs_file_ops;
49 }
50
51
52 /* check if server can support readpages */
53 if (cifs_sb->tcon->ses->server->maxBuf <
54 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
55 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
56 else
57 inode->i_data.a_ops = &cifs_addr_ops;
58 break;
59 case S_IFDIR:
60 #ifdef CONFIG_CIFS_DFS_UPCALL
61 if (is_dfs_referral) {
62 inode->i_op = &cifs_dfs_referral_inode_operations;
63 } else {
64 #else /* NO DFS support, treat as a directory */
65 {
66 #endif
67 inode->i_op = &cifs_dir_inode_ops;
68 inode->i_fop = &cifs_dir_ops;
69 }
70 break;
71 case S_IFLNK:
72 inode->i_op = &cifs_symlink_inode_ops;
73 break;
74 default:
75 init_special_inode(inode, inode->i_mode, inode->i_rdev);
76 break;
77 }
78 }
79
80 static void cifs_unix_info_to_inode(struct inode *inode,
81 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
82 {
83 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
84 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
85 __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
86 __u64 end_of_file = le64_to_cpu(info->EndOfFile);
87
88 inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
89 inode->i_mtime =
90 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
91 inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
92 inode->i_mode = le64_to_cpu(info->Permissions);
93
94 /*
95 * Since we set the inode type below we need to mask off
96 * to avoid strange results if bits set above.
97 */
98 inode->i_mode &= ~S_IFMT;
99 switch (le32_to_cpu(info->Type)) {
100 case UNIX_FILE:
101 inode->i_mode |= S_IFREG;
102 break;
103 case UNIX_SYMLINK:
104 inode->i_mode |= S_IFLNK;
105 break;
106 case UNIX_DIR:
107 inode->i_mode |= S_IFDIR;
108 break;
109 case UNIX_CHARDEV:
110 inode->i_mode |= S_IFCHR;
111 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
112 le64_to_cpu(info->DevMinor) & MINORMASK);
113 break;
114 case UNIX_BLOCKDEV:
115 inode->i_mode |= S_IFBLK;
116 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
117 le64_to_cpu(info->DevMinor) & MINORMASK);
118 break;
119 case UNIX_FIFO:
120 inode->i_mode |= S_IFIFO;
121 break;
122 case UNIX_SOCKET:
123 inode->i_mode |= S_IFSOCK;
124 break;
125 default:
126 /* safest to call it a file if we do not know */
127 inode->i_mode |= S_IFREG;
128 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
129 break;
130 }
131
132 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
133 !force_uid_gid)
134 inode->i_uid = cifs_sb->mnt_uid;
135 else
136 inode->i_uid = le64_to_cpu(info->Uid);
137
138 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
139 !force_uid_gid)
140 inode->i_gid = cifs_sb->mnt_gid;
141 else
142 inode->i_gid = le64_to_cpu(info->Gid);
143
144 inode->i_nlink = le64_to_cpu(info->Nlinks);
145
146 spin_lock(&inode->i_lock);
147 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
148 /*
149 * We can not safely change the file size here if the client
150 * is writing to it due to potential races.
151 */
152 i_size_write(inode, end_of_file);
153
154 /*
155 * i_blocks is not related to (i_size / i_blksize),
156 * but instead 512 byte (2**9) size is required for
157 * calculating num blocks.
158 */
159 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
160 }
161 spin_unlock(&inode->i_lock);
162 }
163
164
165 /*
166 * Needed to setup inode data for the directory which is the
167 * junction to the new submount (ie to setup the fake directory
168 * which represents a DFS referral)
169 */
170 static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
171 struct super_block *sb)
172 {
173 struct inode *pinode = NULL;
174
175 memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
176
177 /* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
178 __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
179 __u64 UniqueId = 0; */
180 pfnd_dat->LastStatusChange =
181 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
182 pfnd_dat->LastAccessTime =
183 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
184 pfnd_dat->LastModificationTime =
185 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
186 pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
187 pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
188 pfnd_dat->Nlinks = cpu_to_le64(2);
189 if (sb->s_root)
190 pinode = sb->s_root->d_inode;
191 if (pinode == NULL)
192 return;
193
194 /* fill in default values for the remaining based on root
195 inode since we can not query the server for this inode info */
196 pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
197 pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
198 pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
199 pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
200 }
201
202 int cifs_get_inode_info_unix(struct inode **pinode,
203 const unsigned char *full_path, struct super_block *sb, int xid)
204 {
205 int rc = 0;
206 FILE_UNIX_BASIC_INFO find_data;
207 struct cifsTconInfo *pTcon;
208 struct inode *inode;
209 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
210 bool is_dfs_referral = false;
211 struct cifsInodeInfo *cifsInfo;
212 __u64 num_of_bytes;
213 __u64 end_of_file;
214
215 pTcon = cifs_sb->tcon;
216 cFYI(1, ("Getting info on %s", full_path));
217
218 /* could have done a find first instead but this returns more info */
219 rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
220 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
221 CIFS_MOUNT_MAP_SPECIAL_CHR);
222 if (rc == -EREMOTE && !is_dfs_referral) {
223 is_dfs_referral = true;
224 cFYI(DBG2, ("DFS ref"));
225 /* for DFS, server does not give us real inode data */
226 fill_fake_finddataunix(&find_data, sb);
227 rc = 0;
228 } else if (rc)
229 goto cgiiu_exit;
230
231 num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
232 end_of_file = le64_to_cpu(find_data.EndOfFile);
233
234 /* get new inode */
235 if (*pinode == NULL) {
236 *pinode = new_inode(sb);
237 if (*pinode == NULL) {
238 rc = -ENOMEM;
239 goto cgiiu_exit;
240 }
241 /* Is an i_ino of zero legal? */
242 /* note ino incremented to unique num in new_inode */
243 /* Are there sanity checks we can use to ensure that
244 the server is really filling in that field? */
245 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
246 (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
247
248 if (sb->s_flags & MS_NOATIME)
249 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
250
251 insert_inode_hash(*pinode);
252 }
253
254 inode = *pinode;
255 cifsInfo = CIFS_I(inode);
256
257 cFYI(1, ("Old time %ld", cifsInfo->time));
258 cifsInfo->time = jiffies;
259 cFYI(1, ("New time %ld", cifsInfo->time));
260 /* this is ok to set on every inode revalidate */
261 atomic_set(&cifsInfo->inUse, 1);
262
263 cifs_unix_info_to_inode(inode, &find_data, 0);
264
265 if (num_of_bytes < end_of_file)
266 cFYI(1, ("allocation size less than end of file"));
267 cFYI(1, ("Size %ld and blocks %llu",
268 (unsigned long) inode->i_size,
269 (unsigned long long)inode->i_blocks));
270
271 cifs_set_ops(inode, is_dfs_referral);
272 cgiiu_exit:
273 return rc;
274 }
275
276 static int decode_sfu_inode(struct inode *inode, __u64 size,
277 const unsigned char *path,
278 struct cifs_sb_info *cifs_sb, int xid)
279 {
280 int rc;
281 int oplock = 0;
282 __u16 netfid;
283 struct cifsTconInfo *pTcon = cifs_sb->tcon;
284 char buf[24];
285 unsigned int bytes_read;
286 char *pbuf;
287
288 pbuf = buf;
289
290 if (size == 0) {
291 inode->i_mode |= S_IFIFO;
292 return 0;
293 } else if (size < 8) {
294 return -EINVAL; /* EOPNOTSUPP? */
295 }
296
297 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
298 CREATE_NOT_DIR, &netfid, &oplock, NULL,
299 cifs_sb->local_nls,
300 cifs_sb->mnt_cifs_flags &
301 CIFS_MOUNT_MAP_SPECIAL_CHR);
302 if (rc == 0) {
303 int buf_type = CIFS_NO_BUFFER;
304 /* Read header */
305 rc = CIFSSMBRead(xid, pTcon,
306 netfid,
307 24 /* length */, 0 /* offset */,
308 &bytes_read, &pbuf, &buf_type);
309 if ((rc == 0) && (bytes_read >= 8)) {
310 if (memcmp("IntxBLK", pbuf, 8) == 0) {
311 cFYI(1, ("Block device"));
312 inode->i_mode |= S_IFBLK;
313 if (bytes_read == 24) {
314 /* we have enough to decode dev num */
315 __u64 mjr; /* major */
316 __u64 mnr; /* minor */
317 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
318 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
319 inode->i_rdev = MKDEV(mjr, mnr);
320 }
321 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
322 cFYI(1, ("Char device"));
323 inode->i_mode |= S_IFCHR;
324 if (bytes_read == 24) {
325 /* we have enough to decode dev num */
326 __u64 mjr; /* major */
327 __u64 mnr; /* minor */
328 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
329 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
330 inode->i_rdev = MKDEV(mjr, mnr);
331 }
332 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
333 cFYI(1, ("Symlink"));
334 inode->i_mode |= S_IFLNK;
335 } else {
336 inode->i_mode |= S_IFREG; /* file? */
337 rc = -EOPNOTSUPP;
338 }
339 } else {
340 inode->i_mode |= S_IFREG; /* then it is a file */
341 rc = -EOPNOTSUPP; /* or some unknown SFU type */
342 }
343 CIFSSMBClose(xid, pTcon, netfid);
344 }
345 return rc;
346 }
347
348 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
349
350 static int get_sfu_mode(struct inode *inode,
351 const unsigned char *path,
352 struct cifs_sb_info *cifs_sb, int xid)
353 {
354 #ifdef CONFIG_CIFS_XATTR
355 ssize_t rc;
356 char ea_value[4];
357 __u32 mode;
358
359 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
360 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
361 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
362 if (rc < 0)
363 return (int)rc;
364 else if (rc > 3) {
365 mode = le32_to_cpu(*((__le32 *)ea_value));
366 inode->i_mode &= ~SFBITS_MASK;
367 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
368 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
369 cFYI(1, ("special mode bits 0%o", mode));
370 return 0;
371 } else {
372 return 0;
373 }
374 #else
375 return -EOPNOTSUPP;
376 #endif
377 }
378
379 /*
380 * Needed to setup inode data for the directory which is the
381 * junction to the new submount (ie to setup the fake directory
382 * which represents a DFS referral)
383 */
384 static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
385 struct super_block *sb)
386 {
387 memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
388
389 /* __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
390 __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
391 __u8 pfnd_dat->DeletePending = 0;
392 __u8 pfnd_data->Directory = 0;
393 __le32 pfnd_dat->EASize = 0;
394 __u64 pfnd_dat->IndexNumber = 0;
395 __u64 pfnd_dat->IndexNumber1 = 0; */
396 pfnd_dat->CreationTime =
397 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
398 pfnd_dat->LastAccessTime =
399 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
400 pfnd_dat->LastWriteTime =
401 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
402 pfnd_dat->ChangeTime =
403 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
404 pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
405 pfnd_dat->NumberOfLinks = cpu_to_le32(2);
406 }
407
408 int cifs_get_inode_info(struct inode **pinode,
409 const unsigned char *full_path, FILE_ALL_INFO *pfindData,
410 struct super_block *sb, int xid, const __u16 *pfid)
411 {
412 int rc = 0;
413 __u32 attr;
414 struct cifsInodeInfo *cifsInfo;
415 struct cifsTconInfo *pTcon;
416 struct inode *inode;
417 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
418 char *buf = NULL;
419 bool adjustTZ = false;
420 bool is_dfs_referral = false;
421 umode_t default_mode;
422
423 pTcon = cifs_sb->tcon;
424 cFYI(1, ("Getting info on %s", full_path));
425
426 if ((pfindData == NULL) && (*pinode != NULL)) {
427 if (CIFS_I(*pinode)->clientCanCacheRead) {
428 cFYI(1, ("No need to revalidate cached inode sizes"));
429 return rc;
430 }
431 }
432
433 /* if file info not passed in then get it from server */
434 if (pfindData == NULL) {
435 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
436 if (buf == NULL)
437 return -ENOMEM;
438 pfindData = (FILE_ALL_INFO *)buf;
439
440 /* could do find first instead but this returns more info */
441 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
442 0 /* not legacy */,
443 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
444 CIFS_MOUNT_MAP_SPECIAL_CHR);
445 /* BB optimize code so we do not make the above call
446 when server claims no NT SMB support and the above call
447 failed at least once - set flag in tcon or mount */
448 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
449 rc = SMBQueryInformation(xid, pTcon, full_path,
450 pfindData, cifs_sb->local_nls,
451 cifs_sb->mnt_cifs_flags &
452 CIFS_MOUNT_MAP_SPECIAL_CHR);
453 adjustTZ = true;
454 }
455 }
456 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
457 if (rc == -EREMOTE) {
458 is_dfs_referral = true;
459 fill_fake_finddata(pfindData, sb);
460 rc = 0;
461 } else if (rc)
462 goto cgii_exit;
463
464 attr = le32_to_cpu(pfindData->Attributes);
465
466 /* get new inode */
467 if (*pinode == NULL) {
468 *pinode = new_inode(sb);
469 if (*pinode == NULL) {
470 rc = -ENOMEM;
471 goto cgii_exit;
472 }
473 /* Is an i_ino of zero legal? Can we use that to check
474 if the server supports returning inode numbers? Are
475 there other sanity checks we can use to ensure that
476 the server is really filling in that field? */
477
478 /* We can not use the IndexNumber field by default from
479 Windows or Samba (in ALL_INFO buf) but we can request
480 it explicitly. It may not be unique presumably if
481 the server has multiple devices mounted under one share */
482
483 /* There may be higher info levels that work but are
484 there Windows server or network appliances for which
485 IndexNumber field is not guaranteed unique? */
486
487 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
488 int rc1 = 0;
489 __u64 inode_num;
490
491 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
492 full_path, &inode_num,
493 cifs_sb->local_nls,
494 cifs_sb->mnt_cifs_flags &
495 CIFS_MOUNT_MAP_SPECIAL_CHR);
496 if (rc1) {
497 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
498 /* BB EOPNOSUPP disable SERVER_INUM? */
499 } else /* do we need cast or hash to ino? */
500 (*pinode)->i_ino = inode_num;
501 } /* else ino incremented to unique num in new_inode*/
502 if (sb->s_flags & MS_NOATIME)
503 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
504 insert_inode_hash(*pinode);
505 }
506 inode = *pinode;
507 cifsInfo = CIFS_I(inode);
508 cifsInfo->cifsAttrs = attr;
509 cFYI(1, ("Old time %ld", cifsInfo->time));
510 cifsInfo->time = jiffies;
511 cFYI(1, ("New time %ld", cifsInfo->time));
512
513 /* blksize needs to be multiple of two. So safer to default to
514 blksize and blkbits set in superblock so 2**blkbits and blksize
515 will match rather than setting to:
516 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
517
518 /* Linux can not store file creation time so ignore it */
519 if (pfindData->LastAccessTime)
520 inode->i_atime = cifs_NTtimeToUnix
521 (le64_to_cpu(pfindData->LastAccessTime));
522 else /* do not need to use current_fs_time - time not stored */
523 inode->i_atime = CURRENT_TIME;
524 inode->i_mtime =
525 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
526 inode->i_ctime =
527 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
528 cFYI(DBG2, ("Attributes came in as 0x%x", attr));
529 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
530 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
531 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
532 }
533
534 /* get default inode mode */
535 if (attr & ATTR_DIRECTORY)
536 default_mode = cifs_sb->mnt_dir_mode;
537 else
538 default_mode = cifs_sb->mnt_file_mode;
539
540 /* set permission bits */
541 if (atomic_read(&cifsInfo->inUse) == 0 ||
542 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
543 inode->i_mode = default_mode;
544 else {
545 /* just reenable write bits if !ATTR_READONLY */
546 if ((inode->i_mode & S_IWUGO) == 0 &&
547 (attr & ATTR_READONLY) == 0)
548 inode->i_mode |= (S_IWUGO & default_mode);
549
550 inode->i_mode &= ~S_IFMT;
551 }
552 /* clear write bits if ATTR_READONLY is set */
553 if (attr & ATTR_READONLY)
554 inode->i_mode &= ~S_IWUGO;
555
556 /* set inode type */
557 if ((attr & ATTR_SYSTEM) &&
558 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
559 /* no need to fix endianness on 0 */
560 if (pfindData->EndOfFile == 0)
561 inode->i_mode |= S_IFIFO;
562 else if (decode_sfu_inode(inode,
563 le64_to_cpu(pfindData->EndOfFile),
564 full_path, cifs_sb, xid))
565 cFYI(1, ("unknown SFU file type\n"));
566 } else {
567 if (attr & ATTR_DIRECTORY)
568 inode->i_mode |= S_IFDIR;
569 else
570 inode->i_mode |= S_IFREG;
571 }
572
573 spin_lock(&inode->i_lock);
574 if (is_size_safe_to_change(cifsInfo,
575 le64_to_cpu(pfindData->EndOfFile))) {
576 /* can not safely shrink the file size here if the
577 client is writing to it due to potential races */
578 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
579
580 /* 512 bytes (2**9) is the fake blocksize that must be
581 used for this calculation */
582 inode->i_blocks = (512 - 1 + le64_to_cpu(
583 pfindData->AllocationSize)) >> 9;
584 }
585 spin_unlock(&inode->i_lock);
586
587 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
588
589 /* BB fill in uid and gid here? with help from winbind?
590 or retrieve from NTFS stream extended attribute */
591 #ifdef CONFIG_CIFS_EXPERIMENTAL
592 /* fill in 0777 bits from ACL */
593 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
594 cFYI(1, ("Getting mode bits from ACL"));
595 acl_to_uid_mode(inode, full_path, pfid);
596 }
597 #endif
598 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
599 /* fill in remaining high mode bits e.g. SUID, VTX */
600 get_sfu_mode(inode, full_path, cifs_sb, xid);
601 } else if (atomic_read(&cifsInfo->inUse) == 0) {
602 inode->i_uid = cifs_sb->mnt_uid;
603 inode->i_gid = cifs_sb->mnt_gid;
604 /* set so we do not keep refreshing these fields with
605 bad data after user has changed them in memory */
606 atomic_set(&cifsInfo->inUse, 1);
607 }
608
609 cifs_set_ops(inode, is_dfs_referral);
610
611
612
613
614 cgii_exit:
615 kfree(buf);
616 return rc;
617 }
618
619 static const struct inode_operations cifs_ipc_inode_ops = {
620 .lookup = cifs_lookup,
621 };
622
623 /* gets root inode */
624 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
625 {
626 int xid;
627 struct cifs_sb_info *cifs_sb;
628 struct inode *inode;
629 long rc;
630
631 inode = iget_locked(sb, ino);
632 if (!inode)
633 return ERR_PTR(-ENOMEM);
634 if (!(inode->i_state & I_NEW))
635 return inode;
636
637 cifs_sb = CIFS_SB(inode->i_sb);
638 xid = GetXid();
639
640 if (cifs_sb->tcon->unix_ext)
641 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
642 else
643 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
644 NULL);
645 if (rc && cifs_sb->tcon->ipc) {
646 cFYI(1, ("ipc connection - fake read inode"));
647 inode->i_mode |= S_IFDIR;
648 inode->i_nlink = 2;
649 inode->i_op = &cifs_ipc_inode_ops;
650 inode->i_fop = &simple_dir_operations;
651 inode->i_uid = cifs_sb->mnt_uid;
652 inode->i_gid = cifs_sb->mnt_gid;
653 } else if (rc) {
654 _FreeXid(xid);
655 iget_failed(inode);
656 return ERR_PTR(rc);
657 }
658
659 unlock_new_inode(inode);
660
661 /* can not call macro FreeXid here since in a void func
662 * TODO: This is no longer true
663 */
664 _FreeXid(xid);
665 return inode;
666 }
667
668 static int
669 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
670 char *full_path, __u32 dosattr)
671 {
672 int rc;
673 int oplock = 0;
674 __u16 netfid;
675 __u32 netpid;
676 bool set_time = false;
677 struct cifsFileInfo *open_file;
678 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
679 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
680 struct cifsTconInfo *pTcon = cifs_sb->tcon;
681 FILE_BASIC_INFO info_buf;
682
683 if (attrs->ia_valid & ATTR_ATIME) {
684 set_time = true;
685 info_buf.LastAccessTime =
686 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
687 } else
688 info_buf.LastAccessTime = 0;
689
690 if (attrs->ia_valid & ATTR_MTIME) {
691 set_time = true;
692 info_buf.LastWriteTime =
693 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
694 } else
695 info_buf.LastWriteTime = 0;
696
697 /*
698 * Samba throws this field away, but windows may actually use it.
699 * Do not set ctime unless other time stamps are changed explicitly
700 * (i.e. by utimes()) since we would then have a mix of client and
701 * server times.
702 */
703 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
704 cFYI(1, ("CIFS - CTIME changed"));
705 info_buf.ChangeTime =
706 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
707 } else
708 info_buf.ChangeTime = 0;
709
710 info_buf.CreationTime = 0; /* don't change */
711 info_buf.Attributes = cpu_to_le32(dosattr);
712
713 /*
714 * If the file is already open for write, just use that fileid
715 */
716 open_file = find_writable_file(cifsInode);
717 if (open_file) {
718 netfid = open_file->netfid;
719 netpid = open_file->pid;
720 goto set_via_filehandle;
721 }
722
723 /*
724 * NT4 apparently returns success on this call, but it doesn't
725 * really work.
726 */
727 if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
728 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
729 &info_buf, cifs_sb->local_nls,
730 cifs_sb->mnt_cifs_flags &
731 CIFS_MOUNT_MAP_SPECIAL_CHR);
732 if (rc != -EOPNOTSUPP && rc != -EINVAL)
733 goto out;
734 }
735
736 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
737 "times not supported by this server"));
738 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
739 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
740 CREATE_NOT_DIR, &netfid, &oplock,
741 NULL, cifs_sb->local_nls,
742 cifs_sb->mnt_cifs_flags &
743 CIFS_MOUNT_MAP_SPECIAL_CHR);
744
745 if (rc != 0) {
746 if (rc == -EIO)
747 rc = -EINVAL;
748 goto out;
749 }
750
751 netpid = current->tgid;
752
753 set_via_filehandle:
754 rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
755 if (open_file == NULL)
756 CIFSSMBClose(xid, pTcon, netfid);
757 else
758 atomic_dec(&open_file->wrtPending);
759 out:
760 return rc;
761 }
762
763 int cifs_unlink(struct inode *dir, struct dentry *dentry)
764 {
765 int rc = 0;
766 int xid;
767 char *full_path = NULL;
768 struct inode *inode = dentry->d_inode;
769 struct cifsInodeInfo *cifsInode;
770 struct super_block *sb = dir->i_sb;
771 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
772 struct cifsTconInfo *tcon = cifs_sb->tcon;
773 struct iattr *attrs;
774 __u32 dosattr;
775
776 cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
777
778 xid = GetXid();
779
780 /* Unlink can be called from rename so we can not take the
781 * sb->s_vfs_rename_mutex here */
782 full_path = build_path_from_dentry(dentry);
783 if (full_path == NULL) {
784 FreeXid(xid);
785 return -ENOMEM;
786 }
787
788 if ((tcon->ses->capabilities & CAP_UNIX) &&
789 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
790 le64_to_cpu(tcon->fsUnixInfo.Capability))) {
791 rc = CIFSPOSIXDelFile(xid, tcon, full_path,
792 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
793 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
794 cFYI(1, ("posix del rc %d", rc));
795 if ((rc == 0) || (rc == -ENOENT))
796 goto psx_del_no_retry;
797 }
798
799 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
800 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
801 psx_del_no_retry:
802 if (!rc) {
803 if (inode)
804 drop_nlink(inode);
805 } else if (rc == -ENOENT) {
806 d_drop(dentry);
807 } else if (rc == -ETXTBSY) {
808 int oplock = 0;
809 __u16 netfid;
810
811 rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE,
812 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
813 &netfid, &oplock, NULL, cifs_sb->local_nls,
814 cifs_sb->mnt_cifs_flags &
815 CIFS_MOUNT_MAP_SPECIAL_CHR);
816 if (rc == 0) {
817 CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL,
818 cifs_sb->local_nls,
819 cifs_sb->mnt_cifs_flags &
820 CIFS_MOUNT_MAP_SPECIAL_CHR);
821 CIFSSMBClose(xid, tcon, netfid);
822 if (inode)
823 drop_nlink(inode);
824 }
825 } else if (rc == -EACCES) {
826 /* try only if r/o attribute set in local lookup data? */
827 attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
828 if (attrs == NULL) {
829 rc = -ENOMEM;
830 goto out_reval;
831 }
832
833 /* try to reset dos attributes */
834 cifsInode = CIFS_I(inode);
835 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
836 if (dosattr == 0)
837 dosattr |= ATTR_NORMAL;
838 dosattr |= ATTR_HIDDEN;
839
840 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
841 kfree(attrs);
842 if (rc != 0)
843 goto out_reval;
844 rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls,
845 cifs_sb->mnt_cifs_flags &
846 CIFS_MOUNT_MAP_SPECIAL_CHR);
847 if (rc == 0) {
848 if (inode)
849 drop_nlink(inode);
850 } else if (rc == -ETXTBSY) {
851 int oplock = 0;
852 __u16 netfid;
853
854 rc = CIFSSMBOpen(xid, tcon, full_path,
855 FILE_OPEN, DELETE,
856 CREATE_NOT_DIR |
857 CREATE_DELETE_ON_CLOSE,
858 &netfid, &oplock, NULL,
859 cifs_sb->local_nls,
860 cifs_sb->mnt_cifs_flags &
861 CIFS_MOUNT_MAP_SPECIAL_CHR);
862 if (rc == 0) {
863 CIFSSMBRenameOpenFile(xid, tcon,
864 netfid, NULL,
865 cifs_sb->local_nls,
866 cifs_sb->mnt_cifs_flags &
867 CIFS_MOUNT_MAP_SPECIAL_CHR);
868 CIFSSMBClose(xid, tcon, netfid);
869 if (inode)
870 drop_nlink(inode);
871 }
872 /* BB if rc = -ETXTBUSY goto the rename logic BB */
873 }
874 }
875 out_reval:
876 if (inode) {
877 cifsInode = CIFS_I(inode);
878 cifsInode->time = 0; /* will force revalidate to get info
879 when needed */
880 inode->i_ctime = current_fs_time(sb);
881 }
882 dir->i_ctime = dir->i_mtime = current_fs_time(sb);
883 cifsInode = CIFS_I(dir);
884 cifsInode->time = 0; /* force revalidate of dir as well */
885
886 kfree(full_path);
887 FreeXid(xid);
888 return rc;
889 }
890
891 static void posix_fill_in_inode(struct inode *tmp_inode,
892 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
893 {
894 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
895 loff_t local_size;
896 struct timespec local_mtime;
897
898 cifsInfo->time = jiffies;
899 atomic_inc(&cifsInfo->inUse);
900
901 /* save mtime and size */
902 local_mtime = tmp_inode->i_mtime;
903 local_size = tmp_inode->i_size;
904
905 cifs_unix_info_to_inode(tmp_inode, pData, 1);
906 cifs_set_ops(tmp_inode, false);
907
908 if (!S_ISREG(tmp_inode->i_mode))
909 return;
910
911 /*
912 * No sense invalidating pages for new inode
913 * since we we have not started caching
914 * readahead file data yet.
915 */
916 if (isNewInode)
917 return;
918
919 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
920 (local_size == tmp_inode->i_size)) {
921 cFYI(1, ("inode exists but unchanged"));
922 } else {
923 /* file may have changed on server */
924 cFYI(1, ("invalidate inode, readdir detected change"));
925 invalidate_remote_inode(tmp_inode);
926 }
927 }
928
929 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
930 {
931 int rc = 0;
932 int xid;
933 struct cifs_sb_info *cifs_sb;
934 struct cifsTconInfo *pTcon;
935 char *full_path = NULL;
936 struct inode *newinode = NULL;
937
938 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
939
940 xid = GetXid();
941
942 cifs_sb = CIFS_SB(inode->i_sb);
943 pTcon = cifs_sb->tcon;
944
945 full_path = build_path_from_dentry(direntry);
946 if (full_path == NULL) {
947 FreeXid(xid);
948 return -ENOMEM;
949 }
950
951 if ((pTcon->ses->capabilities & CAP_UNIX) &&
952 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
953 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
954 u32 oplock = 0;
955 FILE_UNIX_BASIC_INFO *pInfo =
956 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
957 if (pInfo == NULL) {
958 rc = -ENOMEM;
959 goto mkdir_out;
960 }
961
962 mode &= ~current->fs->umask;
963 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
964 mode, NULL /* netfid */, pInfo, &oplock,
965 full_path, cifs_sb->local_nls,
966 cifs_sb->mnt_cifs_flags &
967 CIFS_MOUNT_MAP_SPECIAL_CHR);
968 if (rc == -EOPNOTSUPP) {
969 kfree(pInfo);
970 goto mkdir_retry_old;
971 } else if (rc) {
972 cFYI(1, ("posix mkdir returned 0x%x", rc));
973 d_drop(direntry);
974 } else {
975 if (pInfo->Type == cpu_to_le32(-1)) {
976 /* no return info, go query for it */
977 kfree(pInfo);
978 goto mkdir_get_info;
979 }
980 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
981 to set uid/gid */
982 inc_nlink(inode);
983 if (pTcon->nocase)
984 direntry->d_op = &cifs_ci_dentry_ops;
985 else
986 direntry->d_op = &cifs_dentry_ops;
987
988 newinode = new_inode(inode->i_sb);
989 if (newinode == NULL) {
990 kfree(pInfo);
991 goto mkdir_get_info;
992 }
993 /* Is an i_ino of zero legal? */
994 /* Are there sanity checks we can use to ensure that
995 the server is really filling in that field? */
996 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
997 newinode->i_ino =
998 (unsigned long)pInfo->UniqueId;
999 } /* note ino incremented to unique num in new_inode */
1000 if (inode->i_sb->s_flags & MS_NOATIME)
1001 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
1002 newinode->i_nlink = 2;
1003
1004 insert_inode_hash(newinode);
1005 d_instantiate(direntry, newinode);
1006
1007 /* we already checked in POSIXCreate whether
1008 frame was long enough */
1009 posix_fill_in_inode(direntry->d_inode,
1010 pInfo, 1 /* NewInode */);
1011 #ifdef CONFIG_CIFS_DEBUG2
1012 cFYI(1, ("instantiated dentry %p %s to inode %p",
1013 direntry, direntry->d_name.name, newinode));
1014
1015 if (newinode->i_nlink != 2)
1016 cFYI(1, ("unexpected number of links %d",
1017 newinode->i_nlink));
1018 #endif
1019 }
1020 kfree(pInfo);
1021 goto mkdir_out;
1022 }
1023 mkdir_retry_old:
1024 /* BB add setting the equivalent of mode via CreateX w/ACLs */
1025 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1026 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1027 if (rc) {
1028 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1029 d_drop(direntry);
1030 } else {
1031 mkdir_get_info:
1032 inc_nlink(inode);
1033 if (pTcon->unix_ext)
1034 rc = cifs_get_inode_info_unix(&newinode, full_path,
1035 inode->i_sb, xid);
1036 else
1037 rc = cifs_get_inode_info(&newinode, full_path, NULL,
1038 inode->i_sb, xid, NULL);
1039
1040 if (pTcon->nocase)
1041 direntry->d_op = &cifs_ci_dentry_ops;
1042 else
1043 direntry->d_op = &cifs_dentry_ops;
1044 d_instantiate(direntry, newinode);
1045 /* setting nlink not necessary except in cases where we
1046 * failed to get it from the server or was set bogus */
1047 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1048 direntry->d_inode->i_nlink = 2;
1049
1050 mode &= ~current->fs->umask;
1051 /* must turn on setgid bit if parent dir has it */
1052 if (inode->i_mode & S_ISGID)
1053 mode |= S_ISGID;
1054
1055 if (pTcon->unix_ext) {
1056 struct cifs_unix_set_info_args args = {
1057 .mode = mode,
1058 .ctime = NO_CHANGE_64,
1059 .atime = NO_CHANGE_64,
1060 .mtime = NO_CHANGE_64,
1061 .device = 0,
1062 };
1063 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1064 args.uid = (__u64)current->fsuid;
1065 if (inode->i_mode & S_ISGID)
1066 args.gid = (__u64)inode->i_gid;
1067 else
1068 args.gid = (__u64)current->fsgid;
1069 } else {
1070 args.uid = NO_CHANGE_64;
1071 args.gid = NO_CHANGE_64;
1072 }
1073 CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1074 cifs_sb->local_nls,
1075 cifs_sb->mnt_cifs_flags &
1076 CIFS_MOUNT_MAP_SPECIAL_CHR);
1077 } else {
1078 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1079 (mode & S_IWUGO) == 0) {
1080 FILE_BASIC_INFO pInfo;
1081 memset(&pInfo, 0, sizeof(pInfo));
1082 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1083 CIFSSMBSetPathInfo(xid, pTcon, full_path,
1084 &pInfo, cifs_sb->local_nls,
1085 cifs_sb->mnt_cifs_flags &
1086 CIFS_MOUNT_MAP_SPECIAL_CHR);
1087 }
1088 if (direntry->d_inode) {
1089 if (cifs_sb->mnt_cifs_flags &
1090 CIFS_MOUNT_DYNPERM)
1091 direntry->d_inode->i_mode =
1092 (mode | S_IFDIR);
1093
1094 if (cifs_sb->mnt_cifs_flags &
1095 CIFS_MOUNT_SET_UID) {
1096 direntry->d_inode->i_uid =
1097 current->fsuid;
1098 if (inode->i_mode & S_ISGID)
1099 direntry->d_inode->i_gid =
1100 inode->i_gid;
1101 else
1102 direntry->d_inode->i_gid =
1103 current->fsgid;
1104 }
1105 }
1106 }
1107 }
1108 mkdir_out:
1109 kfree(full_path);
1110 FreeXid(xid);
1111 return rc;
1112 }
1113
1114 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1115 {
1116 int rc = 0;
1117 int xid;
1118 struct cifs_sb_info *cifs_sb;
1119 struct cifsTconInfo *pTcon;
1120 char *full_path = NULL;
1121 struct cifsInodeInfo *cifsInode;
1122
1123 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1124
1125 xid = GetXid();
1126
1127 cifs_sb = CIFS_SB(inode->i_sb);
1128 pTcon = cifs_sb->tcon;
1129
1130 full_path = build_path_from_dentry(direntry);
1131 if (full_path == NULL) {
1132 FreeXid(xid);
1133 return -ENOMEM;
1134 }
1135
1136 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1137 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1138
1139 if (!rc) {
1140 drop_nlink(inode);
1141 spin_lock(&direntry->d_inode->i_lock);
1142 i_size_write(direntry->d_inode, 0);
1143 clear_nlink(direntry->d_inode);
1144 spin_unlock(&direntry->d_inode->i_lock);
1145 }
1146
1147 cifsInode = CIFS_I(direntry->d_inode);
1148 cifsInode->time = 0; /* force revalidate to go get info when
1149 needed */
1150 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1151 current_fs_time(inode->i_sb);
1152
1153 kfree(full_path);
1154 FreeXid(xid);
1155 return rc;
1156 }
1157
1158 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1159 struct inode *target_inode, struct dentry *target_direntry)
1160 {
1161 char *fromName;
1162 char *toName;
1163 struct cifs_sb_info *cifs_sb_source;
1164 struct cifs_sb_info *cifs_sb_target;
1165 struct cifsTconInfo *pTcon;
1166 int xid;
1167 int rc = 0;
1168
1169 xid = GetXid();
1170
1171 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1172 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1173 pTcon = cifs_sb_source->tcon;
1174
1175 if (pTcon != cifs_sb_target->tcon) {
1176 FreeXid(xid);
1177 return -EXDEV; /* BB actually could be allowed if same server,
1178 but different share.
1179 Might eventually add support for this */
1180 }
1181
1182 /* we already have the rename sem so we do not need to grab it again
1183 here to protect the path integrity */
1184 fromName = build_path_from_dentry(source_direntry);
1185 toName = build_path_from_dentry(target_direntry);
1186 if ((fromName == NULL) || (toName == NULL)) {
1187 rc = -ENOMEM;
1188 goto cifs_rename_exit;
1189 }
1190
1191 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1192 cifs_sb_source->local_nls,
1193 cifs_sb_source->mnt_cifs_flags &
1194 CIFS_MOUNT_MAP_SPECIAL_CHR);
1195 if (rc == -EEXIST) {
1196 /* check if they are the same file because rename of hardlinked
1197 files is a noop */
1198 FILE_UNIX_BASIC_INFO *info_buf_source;
1199 FILE_UNIX_BASIC_INFO *info_buf_target;
1200
1201 info_buf_source =
1202 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1203 if (info_buf_source != NULL) {
1204 info_buf_target = info_buf_source + 1;
1205 if (pTcon->unix_ext)
1206 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1207 info_buf_source,
1208 cifs_sb_source->local_nls,
1209 cifs_sb_source->mnt_cifs_flags &
1210 CIFS_MOUNT_MAP_SPECIAL_CHR);
1211 /* else rc is still EEXIST so will fall through to
1212 unlink the target and retry rename */
1213 if (rc == 0) {
1214 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1215 info_buf_target,
1216 cifs_sb_target->local_nls,
1217 /* remap based on source sb */
1218 cifs_sb_source->mnt_cifs_flags &
1219 CIFS_MOUNT_MAP_SPECIAL_CHR);
1220 }
1221 if ((rc == 0) &&
1222 (info_buf_source->UniqueId ==
1223 info_buf_target->UniqueId)) {
1224 /* do not rename since the files are hardlinked which
1225 is a noop */
1226 } else {
1227 /* we either can not tell the files are hardlinked
1228 (as with Windows servers) or files are not
1229 hardlinked so delete the target manually before
1230 renaming to follow POSIX rather than Windows
1231 semantics */
1232 cifs_unlink(target_inode, target_direntry);
1233 rc = CIFSSMBRename(xid, pTcon, fromName,
1234 toName,
1235 cifs_sb_source->local_nls,
1236 cifs_sb_source->mnt_cifs_flags
1237 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1238 }
1239 kfree(info_buf_source);
1240 } /* if we can not get memory just leave rc as EEXIST */
1241 }
1242
1243 if (rc)
1244 cFYI(1, ("rename rc %d", rc));
1245
1246 if ((rc == -EIO) || (rc == -EEXIST)) {
1247 int oplock = 0;
1248 __u16 netfid;
1249
1250 /* BB FIXME Is Generic Read correct for rename? */
1251 /* if renaming directory - we should not say CREATE_NOT_DIR,
1252 need to test renaming open directory, also GENERIC_READ
1253 might not right be right access to request */
1254 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1255 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1256 cifs_sb_source->local_nls,
1257 cifs_sb_source->mnt_cifs_flags &
1258 CIFS_MOUNT_MAP_SPECIAL_CHR);
1259 if (rc == 0) {
1260 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1261 cifs_sb_source->local_nls,
1262 cifs_sb_source->mnt_cifs_flags &
1263 CIFS_MOUNT_MAP_SPECIAL_CHR);
1264 CIFSSMBClose(xid, pTcon, netfid);
1265 }
1266 }
1267
1268 cifs_rename_exit:
1269 kfree(fromName);
1270 kfree(toName);
1271 FreeXid(xid);
1272 return rc;
1273 }
1274
1275 int cifs_revalidate(struct dentry *direntry)
1276 {
1277 int xid;
1278 int rc = 0, wbrc = 0;
1279 char *full_path;
1280 struct cifs_sb_info *cifs_sb;
1281 struct cifsInodeInfo *cifsInode;
1282 loff_t local_size;
1283 struct timespec local_mtime;
1284 bool invalidate_inode = false;
1285
1286 if (direntry->d_inode == NULL)
1287 return -ENOENT;
1288
1289 cifsInode = CIFS_I(direntry->d_inode);
1290
1291 if (cifsInode == NULL)
1292 return -ENOENT;
1293
1294 /* no sense revalidating inode info on file that no one can write */
1295 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1296 return rc;
1297
1298 xid = GetXid();
1299
1300 cifs_sb = CIFS_SB(direntry->d_sb);
1301
1302 /* can not safely grab the rename sem here if rename calls revalidate
1303 since that would deadlock */
1304 full_path = build_path_from_dentry(direntry);
1305 if (full_path == NULL) {
1306 FreeXid(xid);
1307 return -ENOMEM;
1308 }
1309 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1310 "jiffies %ld", full_path, direntry->d_inode,
1311 direntry->d_inode->i_count.counter, direntry,
1312 direntry->d_time, jiffies));
1313
1314 if (cifsInode->time == 0) {
1315 /* was set to zero previously to force revalidate */
1316 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1317 lookupCacheEnabled) {
1318 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1319 (direntry->d_inode->i_nlink == 1)) {
1320 kfree(full_path);
1321 FreeXid(xid);
1322 return rc;
1323 } else {
1324 cFYI(1, ("Have to revalidate file due to hardlinks"));
1325 }
1326 }
1327
1328 /* save mtime and size */
1329 local_mtime = direntry->d_inode->i_mtime;
1330 local_size = direntry->d_inode->i_size;
1331
1332 if (cifs_sb->tcon->unix_ext) {
1333 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1334 direntry->d_sb, xid);
1335 if (rc) {
1336 cFYI(1, ("error on getting revalidate info %d", rc));
1337 /* if (rc != -ENOENT)
1338 rc = 0; */ /* BB should we cache info on
1339 certain errors? */
1340 }
1341 } else {
1342 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1343 direntry->d_sb, xid, NULL);
1344 if (rc) {
1345 cFYI(1, ("error on getting revalidate info %d", rc));
1346 /* if (rc != -ENOENT)
1347 rc = 0; */ /* BB should we cache info on
1348 certain errors? */
1349 }
1350 }
1351 /* should we remap certain errors, access denied?, to zero */
1352
1353 /* if not oplocked, we invalidate inode pages if mtime or file size
1354 had changed on server */
1355
1356 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1357 (local_size == direntry->d_inode->i_size)) {
1358 cFYI(1, ("cifs_revalidate - inode unchanged"));
1359 } else {
1360 /* file may have changed on server */
1361 if (cifsInode->clientCanCacheRead) {
1362 /* no need to invalidate inode pages since we were the
1363 only ones who could have modified the file and the
1364 server copy is staler than ours */
1365 } else {
1366 invalidate_inode = true;
1367 }
1368 }
1369
1370 /* can not grab this sem since kernel filesys locking documentation
1371 indicates i_mutex may be taken by the kernel on lookup and rename
1372 which could deadlock if we grab the i_mutex here as well */
1373 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1374 /* need to write out dirty pages here */
1375 if (direntry->d_inode->i_mapping) {
1376 /* do we need to lock inode until after invalidate completes
1377 below? */
1378 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1379 if (wbrc)
1380 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1381 }
1382 if (invalidate_inode) {
1383 /* shrink_dcache not necessary now that cifs dentry ops
1384 are exported for negative dentries */
1385 /* if (S_ISDIR(direntry->d_inode->i_mode))
1386 shrink_dcache_parent(direntry); */
1387 if (S_ISREG(direntry->d_inode->i_mode)) {
1388 if (direntry->d_inode->i_mapping) {
1389 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1390 if (wbrc)
1391 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1392 }
1393 /* may eventually have to do this for open files too */
1394 if (list_empty(&(cifsInode->openFileList))) {
1395 /* changed on server - flush read ahead pages */
1396 cFYI(1, ("Invalidating read ahead data on "
1397 "closed file"));
1398 invalidate_remote_inode(direntry->d_inode);
1399 }
1400 }
1401 }
1402 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1403
1404 kfree(full_path);
1405 FreeXid(xid);
1406 return rc;
1407 }
1408
1409 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1410 struct kstat *stat)
1411 {
1412 int err = cifs_revalidate(dentry);
1413 if (!err) {
1414 generic_fillattr(dentry->d_inode, stat);
1415 stat->blksize = CIFS_MAX_MSGSIZE;
1416 }
1417 return err;
1418 }
1419
1420 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1421 {
1422 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1423 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1424 struct page *page;
1425 int rc = 0;
1426
1427 page = grab_cache_page(mapping, index);
1428 if (!page)
1429 return -ENOMEM;
1430
1431 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1432 unlock_page(page);
1433 page_cache_release(page);
1434 return rc;
1435 }
1436
1437 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1438 {
1439 struct address_space *mapping = inode->i_mapping;
1440 unsigned long limit;
1441
1442 spin_lock(&inode->i_lock);
1443 if (inode->i_size < offset)
1444 goto do_expand;
1445 /*
1446 * truncation of in-use swapfiles is disallowed - it would cause
1447 * subsequent swapout to scribble on the now-freed blocks.
1448 */
1449 if (IS_SWAPFILE(inode)) {
1450 spin_unlock(&inode->i_lock);
1451 goto out_busy;
1452 }
1453 i_size_write(inode, offset);
1454 spin_unlock(&inode->i_lock);
1455 /*
1456 * unmap_mapping_range is called twice, first simply for efficiency
1457 * so that truncate_inode_pages does fewer single-page unmaps. However
1458 * after this first call, and before truncate_inode_pages finishes,
1459 * it is possible for private pages to be COWed, which remain after
1460 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1461 * call must be made for correctness.
1462 */
1463 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1464 truncate_inode_pages(mapping, offset);
1465 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1466 goto out_truncate;
1467
1468 do_expand:
1469 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1470 if (limit != RLIM_INFINITY && offset > limit) {
1471 spin_unlock(&inode->i_lock);
1472 goto out_sig;
1473 }
1474 if (offset > inode->i_sb->s_maxbytes) {
1475 spin_unlock(&inode->i_lock);
1476 goto out_big;
1477 }
1478 i_size_write(inode, offset);
1479 spin_unlock(&inode->i_lock);
1480 out_truncate:
1481 if (inode->i_op && inode->i_op->truncate)
1482 inode->i_op->truncate(inode);
1483 return 0;
1484 out_sig:
1485 send_sig(SIGXFSZ, current, 0);
1486 out_big:
1487 return -EFBIG;
1488 out_busy:
1489 return -ETXTBSY;
1490 }
1491
1492 static int
1493 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1494 int xid, char *full_path)
1495 {
1496 int rc;
1497 struct cifsFileInfo *open_file;
1498 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1499 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1500 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1501
1502 /*
1503 * To avoid spurious oplock breaks from server, in the case of
1504 * inodes that we already have open, avoid doing path based
1505 * setting of file size if we can do it by handle.
1506 * This keeps our caching token (oplock) and avoids timeouts
1507 * when the local oplock break takes longer to flush
1508 * writebehind data than the SMB timeout for the SetPathInfo
1509 * request would allow
1510 */
1511 open_file = find_writable_file(cifsInode);
1512 if (open_file) {
1513 __u16 nfid = open_file->netfid;
1514 __u32 npid = open_file->pid;
1515 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1516 npid, false);
1517 atomic_dec(&open_file->wrtPending);
1518 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1519 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1520 unsigned int bytes_written;
1521 rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1522 &bytes_written, NULL, NULL, 1);
1523 cFYI(1, ("Wrt seteof rc %d", rc));
1524 }
1525 } else
1526 rc = -EINVAL;
1527
1528 if (rc != 0) {
1529 /* Set file size by pathname rather than by handle
1530 either because no valid, writeable file handle for
1531 it was found or because there was an error setting
1532 it by handle */
1533 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1534 false, cifs_sb->local_nls,
1535 cifs_sb->mnt_cifs_flags &
1536 CIFS_MOUNT_MAP_SPECIAL_CHR);
1537 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1538 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1539 __u16 netfid;
1540 int oplock = 0;
1541
1542 rc = SMBLegacyOpen(xid, pTcon, full_path,
1543 FILE_OPEN, GENERIC_WRITE,
1544 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1545 cifs_sb->local_nls,
1546 cifs_sb->mnt_cifs_flags &
1547 CIFS_MOUNT_MAP_SPECIAL_CHR);
1548 if (rc == 0) {
1549 unsigned int bytes_written;
1550 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1551 attrs->ia_size,
1552 &bytes_written, NULL,
1553 NULL, 1);
1554 cFYI(1, ("wrt seteof rc %d", rc));
1555 CIFSSMBClose(xid, pTcon, netfid);
1556 }
1557 }
1558 }
1559
1560 if (rc == 0) {
1561 rc = cifs_vmtruncate(inode, attrs->ia_size);
1562 cifs_truncate_page(inode->i_mapping, inode->i_size);
1563 }
1564
1565 return rc;
1566 }
1567
1568 static int
1569 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1570 {
1571 int rc;
1572 int xid;
1573 char *full_path = NULL;
1574 struct inode *inode = direntry->d_inode;
1575 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1576 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1577 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1578 struct cifs_unix_set_info_args *args = NULL;
1579
1580 cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1581 direntry->d_name.name, attrs->ia_valid));
1582
1583 xid = GetXid();
1584
1585 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1586 /* check if we have permission to change attrs */
1587 rc = inode_change_ok(inode, attrs);
1588 if (rc < 0)
1589 goto out;
1590 else
1591 rc = 0;
1592 }
1593
1594 full_path = build_path_from_dentry(direntry);
1595 if (full_path == NULL) {
1596 rc = -ENOMEM;
1597 goto out;
1598 }
1599
1600 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1601 /*
1602 Flush data before changing file size or changing the last
1603 write time of the file on the server. If the
1604 flush returns error, store it to report later and continue.
1605 BB: This should be smarter. Why bother flushing pages that
1606 will be truncated anyway? Also, should we error out here if
1607 the flush returns error?
1608 */
1609 rc = filemap_write_and_wait(inode->i_mapping);
1610 if (rc != 0) {
1611 cifsInode->write_behind_rc = rc;
1612 rc = 0;
1613 }
1614 }
1615
1616 if (attrs->ia_valid & ATTR_SIZE) {
1617 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1618 if (rc != 0)
1619 goto out;
1620 }
1621
1622 /* skip mode change if it's just for clearing setuid/setgid */
1623 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1624 attrs->ia_valid &= ~ATTR_MODE;
1625
1626 args = kmalloc(sizeof(*args), GFP_KERNEL);
1627 if (args == NULL) {
1628 rc = -ENOMEM;
1629 goto out;
1630 }
1631
1632 /* set up the struct */
1633 if (attrs->ia_valid & ATTR_MODE)
1634 args->mode = attrs->ia_mode;
1635 else
1636 args->mode = NO_CHANGE_64;
1637
1638 if (attrs->ia_valid & ATTR_UID)
1639 args->uid = attrs->ia_uid;
1640 else
1641 args->uid = NO_CHANGE_64;
1642
1643 if (attrs->ia_valid & ATTR_GID)
1644 args->gid = attrs->ia_gid;
1645 else
1646 args->gid = NO_CHANGE_64;
1647
1648 if (attrs->ia_valid & ATTR_ATIME)
1649 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1650 else
1651 args->atime = NO_CHANGE_64;
1652
1653 if (attrs->ia_valid & ATTR_MTIME)
1654 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1655 else
1656 args->mtime = NO_CHANGE_64;
1657
1658 if (attrs->ia_valid & ATTR_CTIME)
1659 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1660 else
1661 args->ctime = NO_CHANGE_64;
1662
1663 args->device = 0;
1664 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1665 cifs_sb->local_nls,
1666 cifs_sb->mnt_cifs_flags &
1667 CIFS_MOUNT_MAP_SPECIAL_CHR);
1668
1669 if (!rc)
1670 rc = inode_setattr(inode, attrs);
1671 out:
1672 kfree(args);
1673 kfree(full_path);
1674 FreeXid(xid);
1675 return rc;
1676 }
1677
1678 static int
1679 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1680 {
1681 int xid;
1682 struct inode *inode = direntry->d_inode;
1683 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1684 struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1685 char *full_path = NULL;
1686 int rc = -EACCES;
1687 __u32 dosattr = 0;
1688 __u64 mode = NO_CHANGE_64;
1689
1690 xid = GetXid();
1691
1692 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1693 direntry->d_name.name, attrs->ia_valid));
1694
1695 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1696 /* check if we have permission to change attrs */
1697 rc = inode_change_ok(inode, attrs);
1698 if (rc < 0) {
1699 FreeXid(xid);
1700 return rc;
1701 } else
1702 rc = 0;
1703 }
1704
1705 full_path = build_path_from_dentry(direntry);
1706 if (full_path == NULL) {
1707 FreeXid(xid);
1708 return -ENOMEM;
1709 }
1710
1711 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1712 /*
1713 Flush data before changing file size or changing the last
1714 write time of the file on the server. If the
1715 flush returns error, store it to report later and continue.
1716 BB: This should be smarter. Why bother flushing pages that
1717 will be truncated anyway? Also, should we error out here if
1718 the flush returns error?
1719 */
1720 rc = filemap_write_and_wait(inode->i_mapping);
1721 if (rc != 0) {
1722 cifsInode->write_behind_rc = rc;
1723 rc = 0;
1724 }
1725 }
1726
1727 if (attrs->ia_valid & ATTR_SIZE) {
1728 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1729 if (rc != 0)
1730 goto cifs_setattr_exit;
1731 }
1732
1733 /*
1734 * Without unix extensions we can't send ownership changes to the
1735 * server, so silently ignore them. This is consistent with how
1736 * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1737 * CIFSACL support + proper Windows to Unix idmapping, we may be
1738 * able to support this in the future.
1739 */
1740 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1741 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1742
1743 /* skip mode change if it's just for clearing setuid/setgid */
1744 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1745 attrs->ia_valid &= ~ATTR_MODE;
1746
1747 if (attrs->ia_valid & ATTR_MODE) {
1748 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1749 mode = attrs->ia_mode;
1750 }
1751
1752 if (attrs->ia_valid & ATTR_MODE) {
1753 rc = 0;
1754 #ifdef CONFIG_CIFS_EXPERIMENTAL
1755 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1756 rc = mode_to_acl(inode, full_path, mode);
1757 else
1758 #endif
1759 if (((mode & S_IWUGO) == 0) &&
1760 (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1761
1762 dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1763
1764 /* fix up mode if we're not using dynperm */
1765 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1766 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1767 } else if ((mode & S_IWUGO) &&
1768 (cifsInode->cifsAttrs & ATTR_READONLY)) {
1769
1770 dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1771 /* Attributes of 0 are ignored */
1772 if (dosattr == 0)
1773 dosattr |= ATTR_NORMAL;
1774
1775 /* reset local inode permissions to normal */
1776 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1777 attrs->ia_mode &= ~(S_IALLUGO);
1778 if (S_ISDIR(inode->i_mode))
1779 attrs->ia_mode |=
1780 cifs_sb->mnt_dir_mode;
1781 else
1782 attrs->ia_mode |=
1783 cifs_sb->mnt_file_mode;
1784 }
1785 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1786 /* ignore mode change - ATTR_READONLY hasn't changed */
1787 attrs->ia_valid &= ~ATTR_MODE;
1788 }
1789 }
1790
1791 if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1792 ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1793 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1794 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1795
1796 /* Even if error on time set, no sense failing the call if
1797 the server would set the time to a reasonable value anyway,
1798 and this check ensures that we are not being called from
1799 sys_utimes in which case we ought to fail the call back to
1800 the user when the server rejects the call */
1801 if ((rc) && (attrs->ia_valid &
1802 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1803 rc = 0;
1804 }
1805
1806 /* do not need local check to inode_check_ok since the server does
1807 that */
1808 if (!rc)
1809 rc = inode_setattr(inode, attrs);
1810 cifs_setattr_exit:
1811 kfree(full_path);
1812 FreeXid(xid);
1813 return rc;
1814 }
1815
1816 int
1817 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1818 {
1819 struct inode *inode = direntry->d_inode;
1820 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1821 struct cifsTconInfo *pTcon = cifs_sb->tcon;
1822
1823 if (pTcon->unix_ext)
1824 return cifs_setattr_unix(direntry, attrs);
1825
1826 return cifs_setattr_nounix(direntry, attrs);
1827
1828 /* BB: add cifs_setattr_legacy for really old servers */
1829 }
1830
1831 #if 0
1832 void cifs_delete_inode(struct inode *inode)
1833 {
1834 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1835 /* may have to add back in if and when safe distributed caching of
1836 directories added e.g. via FindNotify */
1837 }
1838 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree