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[CIFS] Allow null user connections
[net-next-2.6.git] / fs / cifs / inode.c
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1da177e4
LT		 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>
1da177e4
LT		 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
32int cifs_get_inode_info_unix(struct inode **pinode,
33 const unsigned char *search_path, struct super_block *sb, int xid)
34{
35 int rc = 0;
36 FILE_UNIX_BASIC_INFO findData;
37 struct cifsTconInfo *pTcon;
38 struct inode *inode;
39 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
40 char *tmp_path;
41
42 pTcon = cifs_sb->tcon;
26a21b98 43 cFYI(1, ("Getting info on %s", search_path));
1da177e4
LT		 44 /* could have done a find first instead but this returns more info */
45 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
737b758c
SF		 46 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
47 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 48/* dump_mem("\nUnixQPathInfo return data", &findData,
49 sizeof(findData)); */
50 if (rc) {
51 if (rc == -EREMOTE) {
52 tmp_path =
53 kmalloc(strnlen(pTcon->treeName,
54 MAX_TREE_SIZE + 1) +
55 strnlen(search_path, MAX_PATHCONF) + 1,
56 GFP_KERNEL);
57 if (tmp_path == NULL) {
58 return -ENOMEM;
59 }
60 /* have to skip first of the double backslash of
61 UNC name */
62 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
63 strncat(tmp_path, search_path, MAX_PATHCONF);
64 rc = connect_to_dfs_path(xid, pTcon->ses,
65 /* treename + */ tmp_path,
737b758c
SF		 66 cifs_sb->local_nls,
67 cifs_sb->mnt_cifs_flags &
68 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 69 kfree(tmp_path);
70
71 /* BB fix up inode etc. */
72 } else if (rc) {
73 return rc;
74 }
75 } else {
76 struct cifsInodeInfo *cifsInfo;
77 __u32 type = le32_to_cpu(findData.Type);
78 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
79 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
80
81 /* get new inode */
82 if (*pinode == NULL) {
83 *pinode = new_inode(sb);
d0d2f2df 84 if (*pinode == NULL)
1da177e4
LT		 85 return -ENOMEM;
86 /* Is an i_ino of zero legal? */
87 /* Are there sanity checks we can use to ensure that
88 the server is really filling in that field? */
d0d2f2df 89 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1da177e4
LT		 90 (*pinode)->i_ino =
91 (unsigned long)findData.UniqueId;
92 } /* note ino incremented to unique num in new_inode */
93 insert_inode_hash(*pinode);
94 }
95
96 inode = *pinode;
97 cifsInfo = CIFS_I(inode);
98
26a21b98 99 cFYI(1, ("Old time %ld", cifsInfo->time));
1da177e4 100 cifsInfo->time = jiffies;
26a21b98 101 cFYI(1, ("New time %ld", cifsInfo->time));
1da177e4
LT		 102 /* this is ok to set on every inode revalidate */
103 atomic_set(&cifsInfo->inUse,1);
104
105 inode->i_atime =
106 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
107 inode->i_mtime =
108 cifs_NTtimeToUnix(le64_to_cpu
109 (findData.LastModificationTime));
110 inode->i_ctime =
111 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
112 inode->i_mode = le64_to_cpu(findData.Permissions);
3020a1f5
SF		 113 /* since we set the inode type below we need to mask off
114 to avoid strange results if bits set above */
115 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 116 if (type == UNIX_FILE) {
117 inode->i_mode |= S_IFREG;
118 } else if (type == UNIX_SYMLINK) {
119 inode->i_mode |= S_IFLNK;
120 } else if (type == UNIX_DIR) {
121 inode->i_mode |= S_IFDIR;
122 } else if (type == UNIX_CHARDEV) {
123 inode->i_mode |= S_IFCHR;
124 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
125 le64_to_cpu(findData.DevMinor) & MINORMASK);
126 } else if (type == UNIX_BLOCKDEV) {
127 inode->i_mode |= S_IFBLK;
128 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
129 le64_to_cpu(findData.DevMinor) & MINORMASK);
130 } else if (type == UNIX_FIFO) {
131 inode->i_mode |= S_IFIFO;
132 } else if (type == UNIX_SOCKET) {
133 inode->i_mode |= S_IFSOCK;
3020a1f5
SF		 134 } else {
135 /* safest to call it a file if we do not know */
136 inode->i_mode |= S_IFREG;
137 cFYI(1,("unknown type %d",type));
1da177e4
LT		 138 }
139 inode->i_uid = le64_to_cpu(findData.Uid);
140 inode->i_gid = le64_to_cpu(findData.Gid);
141 inode->i_nlink = le64_to_cpu(findData.Nlinks);
142
d0d2f2df 143 if (is_size_safe_to_change(cifsInfo)) {
1da177e4
LT		 144 /* can not safely change the file size here if the
145 client is writing to it due to potential races */
146
147 i_size_write(inode, end_of_file);
148
149 /* blksize needs to be multiple of two. So safer to default to
150 blksize and blkbits set in superblock so 2**blkbits and blksize
151 will match rather than setting to:
152 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
153
154 /* This seems incredibly stupid but it turns out that i_blocks
155 is not related to (i_size / i_blksize), instead 512 byte size
156 is required for calculating num blocks */
157
158 /* 512 bytes (2**9) is the fake blocksize that must be used */
159 /* for this calculation */
160 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
161 }
162
163 if (num_of_bytes < end_of_file)
8b94bcb9 164 cFYI(1, ("allocation size less than end of file"));
5515eff8
AM		 165 cFYI(1, ("Size %ld and blocks %llu",
166 (unsigned long) inode->i_size,
167 (unsigned long long)inode->i_blocks));
1da177e4 168 if (S_ISREG(inode->i_mode)) {
8b94bcb9 169 cFYI(1, ("File inode"));
1da177e4 170 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 171 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
172 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
173 inode->i_fop =
174 &cifs_file_direct_nobrl_ops;
175 else
176 inode->i_fop = &cifs_file_direct_ops;
177 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
178 inode->i_fop = &cifs_file_nobrl_ops;
179 else /* not direct, send byte range locks */
1da177e4 180 inode->i_fop = &cifs_file_ops;
8b94bcb9 181
bfa0d75a
SF		 182 /* check if server can support readpages */
183 if(pTcon->ses->server->maxBuf <
273d81d6
DK		 184 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
185 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
186 else
187 inode->i_data.a_ops = &cifs_addr_ops;
1da177e4 188 } else if (S_ISDIR(inode->i_mode)) {
8b94bcb9 189 cFYI(1, ("Directory inode"));
1da177e4
LT		 190 inode->i_op = &cifs_dir_inode_ops;
191 inode->i_fop = &cifs_dir_ops;
192 } else if (S_ISLNK(inode->i_mode)) {
8b94bcb9 193 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 194 inode->i_op = &cifs_symlink_inode_ops;
195 /* tmp_inode->i_fop = */ /* do not need to set to anything */
196 } else {
8b94bcb9 197 cFYI(1, ("Init special inode"));
1da177e4
LT		 198 init_special_inode(inode, inode->i_mode,
199 inode->i_rdev);
200 }
201 }
202 return rc;
203}
204
d6e2f2a4
SF		 205static int decode_sfu_inode(struct inode * inode, __u64 size,
206 const unsigned char *path,
207 struct cifs_sb_info *cifs_sb, int xid)
208{
209 int rc;
210 int oplock = FALSE;
211 __u16 netfid;
212 struct cifsTconInfo *pTcon = cifs_sb->tcon;
86c96b4b 213 char buf[24];
d6e2f2a4
SF		 214 unsigned int bytes_read;
215 char * pbuf;
216
217 pbuf = buf;
218
219 if(size == 0) {
220 inode->i_mode |= S_IFIFO;
221 return 0;
222 } else if (size < 8) {
223 return -EINVAL; /* EOPNOTSUPP? */
224 }
225
226 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
227 CREATE_NOT_DIR, &netfid, &oplock, NULL,
228 cifs_sb->local_nls,
229 cifs_sb->mnt_cifs_flags &
230 CIFS_MOUNT_MAP_SPECIAL_CHR);
231 if (rc==0) {
ec637e3f 232 int buf_type = CIFS_NO_BUFFER;
d6e2f2a4
SF		 233 /* Read header */
234 rc = CIFSSMBRead(xid, pTcon,
235 netfid,
86c96b4b 236 24 /* length */, 0 /* offset */,
ec637e3f 237 &bytes_read, &pbuf, &buf_type);
86c96b4b 238 if((rc == 0) && (bytes_read >= 8)) {
9e294f1c
SF		 239 if(memcmp("IntxBLK", pbuf, 8) == 0) {
240 cFYI(1,("Block device"));
3020a1f5 241 inode->i_mode |= S_IFBLK;
86c96b4b
SF		 242 if(bytes_read == 24) {
243 /* we have enough to decode dev num */
244 __u64 mjr; /* major */
245 __u64 mnr; /* minor */
246 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
247 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
248 inode->i_rdev = MKDEV(mjr, mnr);
249 }
9e294f1c
SF		 250 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
251 cFYI(1,("Char device"));
3020a1f5 252 inode->i_mode |= S_IFCHR;
86c96b4b
SF		 253 if(bytes_read == 24) {
254 /* we have enough to decode dev num */
255 __u64 mjr; /* major */
256 __u64 mnr; /* minor */
257 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
258 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
259 inode->i_rdev = MKDEV(mjr, mnr);
260 }
9e294f1c
SF		 261 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
262 cFYI(1,("Symlink"));
3020a1f5 263 inode->i_mode |= S_IFLNK;
86c96b4b
SF		 264 } else {
265 inode->i_mode |= S_IFREG; /* file? */
266 rc = -EOPNOTSUPP;
267 }
3020a1f5
SF		 268 } else {
269 inode->i_mode |= S_IFREG; /* then it is a file */
270 rc = -EOPNOTSUPP; /* or some unknown SFU type */
ec637e3f 271 }
d6e2f2a4 272 CIFSSMBClose(xid, pTcon, netfid);
d6e2f2a4
SF		 273 }
274 return rc;
275
276}
277
9e294f1c
SF		 278#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
279
280static int get_sfu_uid_mode(struct inode * inode,
281 const unsigned char *path,
282 struct cifs_sb_info *cifs_sb, int xid)
283{
3020a1f5 284#ifdef CONFIG_CIFS_XATTR
9e294f1c
SF		 285 ssize_t rc;
286 char ea_value[4];
287 __u32 mode;
288
289 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
290 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
291 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
292 if(rc < 0)
293 return (int)rc;
294 else if (rc > 3) {
295 mode = le32_to_cpu(*((__le32 *)ea_value));
c119b87d 296 inode->i_mode &= ~SFBITS_MASK;
3020a1f5 297 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
9e294f1c
SF		 298 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
299 cFYI(1,("special mode bits 0%o", mode));
300 return 0;
301 } else {
302 return 0;
303 }
3020a1f5
SF		 304#else
305 return -EOPNOTSUPP;
306#endif
307
9e294f1c
SF		 308
309}
310
1da177e4
LT		 311int cifs_get_inode_info(struct inode **pinode,
312 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
313 struct super_block *sb, int xid)
314{
315 int rc = 0;
316 struct cifsTconInfo *pTcon;
317 struct inode *inode;
318 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
319 char *tmp_path;
320 char *buf = NULL;
321
322 pTcon = cifs_sb->tcon;
d6e2f2a4 323 cFYI(1,("Getting info on %s", search_path));
1da177e4 324
d0d2f2df
SF		 325 if ((pfindData == NULL) && (*pinode != NULL)) {
326 if (CIFS_I(*pinode)->clientCanCacheRead) {
1da177e4
LT		 327 cFYI(1,("No need to revalidate cached inode sizes"));
328 return rc;
329 }
330 }
331
332 /* if file info not passed in then get it from server */
d0d2f2df 333 if (pfindData == NULL) {
1da177e4 334 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 335 if (buf == NULL)
1da177e4
LT		 336 return -ENOMEM;
337 pfindData = (FILE_ALL_INFO *)buf;
338 /* could do find first instead but this returns more info */
339 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
acf1a1b1 340 0 /* not legacy */,
6b8edfe0 341 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 342 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 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
1da177e4
LT		 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,
737b758c
SF		 372 cifs_sb->local_nls,
373 cifs_sb->mnt_cifs_flags &
374 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 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);
acf1a1b1
SF		 388 if (*pinode == NULL) {
389 kfree(buf);
1da177e4 390 return -ENOMEM;
acf1a1b1 391 }
1da177e4
LT		 392 /* Is an i_ino of zero legal? Can we use that to check
393 if the server supports returning inode numbers? Are
394 there other sanity checks we can use to ensure that
395 the server is really filling in that field? */
396
397 /* We can not use the IndexNumber field by default from
398 Windows or Samba (in ALL_INFO buf) but we can request
399 it explicitly. It may not be unique presumably if
400 the server has multiple devices mounted under one
401 share */
402
403 /* There may be higher info levels that work but are
404 there Windows server or network appliances for which
405 IndexNumber field is not guaranteed unique? */
406
d0d2f2df 407 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 408 int rc1 = 0;
409 __u64 inode_num;
410
411 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
412 search_path, &inode_num,
737b758c
SF		 413 cifs_sb->local_nls,
414 cifs_sb->mnt_cifs_flags &
415 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 416 if (rc1) {
1da177e4
LT		 417 cFYI(1,("GetSrvInodeNum rc %d", rc1));
418 /* BB EOPNOSUPP disable SERVER_INUM? */
419 } else /* do we need cast or hash to ino? */
420 (*pinode)->i_ino = inode_num;
421 } /* else ino incremented to unique num in new_inode*/
1da177e4
LT		 422 insert_inode_hash(*pinode);
423 }
424 inode = *pinode;
425 cifsInfo = CIFS_I(inode);
426 cifsInfo->cifsAttrs = attr;
26a21b98 427 cFYI(1, ("Old time %ld", cifsInfo->time));
1da177e4 428 cifsInfo->time = jiffies;
26a21b98 429 cFYI(1, ("New time %ld", cifsInfo->time));
1da177e4
LT		 430
431 /* blksize needs to be multiple of two. So safer to default to
432 blksize and blkbits set in superblock so 2**blkbits and blksize
433 will match rather than setting to:
434 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
435
26a21b98 436 /* Linux can not store file creation time so ignore it */
1bd5bbcb
SF		 437 if(pfindData->LastAccessTime)
438 inode->i_atime = cifs_NTtimeToUnix
439 (le64_to_cpu(pfindData->LastAccessTime));
440 else /* do not need to use current_fs_time - time not stored */
441 inode->i_atime = CURRENT_TIME;
1da177e4
LT		 442 inode->i_mtime =
443 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
444 inode->i_ctime =
445 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
26a21b98 446 cFYI(0, ("Attributes came in as 0x%x", attr));
1da177e4
LT		 447
448 /* set default mode. will override for dirs below */
449 if (atomic_read(&cifsInfo->inUse) == 0)
450 /* new inode, can safely set these fields */
451 inode->i_mode = cifs_sb->mnt_file_mode;
3020a1f5
SF		 452 else /* since we set the inode type below we need to mask off
453 to avoid strange results if type changes and both get orred in */
454 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 455/* if (attr & ATTR_REPARSE) */
456 /* We no longer handle these as symlinks because we could not
457 follow them due to the absolute path with drive letter */
458 if (attr & ATTR_DIRECTORY) {
459 /* override default perms since we do not do byte range locking
460 on dirs */
461 inode->i_mode = cifs_sb->mnt_dir_mode;
462 inode->i_mode |= S_IFDIR;
eda3c029
SF		 463 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
464 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
465 /* No need to le64 convert size of zero */
466 (pfindData->EndOfFile == 0)) {
467 inode->i_mode = cifs_sb->mnt_file_mode;
468 inode->i_mode |= S_IFIFO;
d6e2f2a4
SF		 469/* BB Finish for SFU style symlinks and devices */
470 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
471 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
472 if (decode_sfu_inode(inode,
473 le64_to_cpu(pfindData->EndOfFile),
474 search_path,
475 cifs_sb, xid)) {
476 cFYI(1,("Unrecognized sfu inode type"));
477 }
3020a1f5 478 cFYI(1,("sfu mode 0%o",inode->i_mode));
1da177e4
LT		 479 } else {
480 inode->i_mode |= S_IFREG;
481 /* treat the dos attribute of read-only as read-only
482 mode e.g. 555 */
483 if (cifsInfo->cifsAttrs & ATTR_READONLY)
484 inode->i_mode &= ~(S_IWUGO);
485 /* BB add code here -
486 validate if device or weird share or device type? */
487 }
488 if (is_size_safe_to_change(cifsInfo)) {
489 /* can not safely change the file size here if the
490 client is writing to it due to potential races */
491 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
492
493 /* 512 bytes (2**9) is the fake blocksize that must be
494 used for this calculation */
495 inode->i_blocks = (512 - 1 + le64_to_cpu(
496 pfindData->AllocationSize)) >> 9;
497 }
498
499 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
500
501 /* BB fill in uid and gid here? with help from winbind?
502 or retrieve from NTFS stream extended attribute */
9e294f1c
SF		 503 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
504 /* fill in uid, gid, mode from server ACL */
505 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
506 } else if (atomic_read(&cifsInfo->inUse) == 0) {
1da177e4
LT		 507 inode->i_uid = cifs_sb->mnt_uid;
508 inode->i_gid = cifs_sb->mnt_gid;
509 /* set so we do not keep refreshing these fields with
510 bad data after user has changed them in memory */
511 atomic_set(&cifsInfo->inUse,1);
512 }
513
514 if (S_ISREG(inode->i_mode)) {
d6e2f2a4 515 cFYI(1, ("File inode"));
1da177e4 516 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 517 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
518 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
519 inode->i_fop =
520 &cifs_file_direct_nobrl_ops;
521 else
522 inode->i_fop = &cifs_file_direct_ops;
523 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
524 inode->i_fop = &cifs_file_nobrl_ops;
525 else /* not direct, send byte range locks */
1da177e4 526 inode->i_fop = &cifs_file_ops;
8b94bcb9 527
bfa0d75a 528 if(pTcon->ses->server->maxBuf <
273d81d6
DK		 529 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
530 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
531 else
532 inode->i_data.a_ops = &cifs_addr_ops;
1da177e4 533 } else if (S_ISDIR(inode->i_mode)) {
d6e2f2a4 534 cFYI(1, ("Directory inode"));
1da177e4
LT		 535 inode->i_op = &cifs_dir_inode_ops;
536 inode->i_fop = &cifs_dir_ops;
537 } else if (S_ISLNK(inode->i_mode)) {
d6e2f2a4 538 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 539 inode->i_op = &cifs_symlink_inode_ops;
540 } else {
541 init_special_inode(inode, inode->i_mode,
542 inode->i_rdev);
543 }
544 }
545 kfree(buf);
546 return rc;
547}
548
549/* gets root inode */
550void cifs_read_inode(struct inode *inode)
551{
552 int xid;
553 struct cifs_sb_info *cifs_sb;
554
555 cifs_sb = CIFS_SB(inode->i_sb);
556 xid = GetXid();
557 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
558 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
559 else
560 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
561 /* can not call macro FreeXid here since in a void func */
562 _FreeXid(xid);
563}
564
565int cifs_unlink(struct inode *inode, struct dentry *direntry)
566{
567 int rc = 0;
568 int xid;
569 struct cifs_sb_info *cifs_sb;
570 struct cifsTconInfo *pTcon;
571 char *full_path = NULL;
572 struct cifsInodeInfo *cifsInode;
573 FILE_BASIC_INFO *pinfo_buf;
574
06bcfedd 575 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
1da177e4
LT		 576
577 xid = GetXid();
578
6910ab30
SF		 579 if(inode)
580 cifs_sb = CIFS_SB(inode->i_sb);
581 else
06bcfedd 582 cifs_sb = CIFS_SB(direntry->d_sb);
1da177e4
LT		 583 pTcon = cifs_sb->tcon;
584
585 /* Unlink can be called from rename so we can not grab the sem here
586 since we deadlock otherwise */
a11f3a05 587/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
7f57356b 588 full_path = build_path_from_dentry(direntry);
a11f3a05 589/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
1da177e4
LT		 590 if (full_path == NULL) {
591 FreeXid(xid);
592 return -ENOMEM;
593 }
737b758c
SF		 594 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
595 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 596
597 if (!rc) {
d0d2f2df 598 if (direntry->d_inode)
9a53c3a7 599 drop_nlink(direntry->d_inode);
1da177e4
LT		 600 } else if (rc == -ENOENT) {
601 d_drop(direntry);
602 } else if (rc == -ETXTBSY) {
603 int oplock = FALSE;
604 __u16 netfid;
605
606 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
607 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 608 &netfid, &oplock, NULL, cifs_sb->local_nls,
609 cifs_sb->mnt_cifs_flags &
610 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 611 if (rc==0) {
612 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 613 cifs_sb->local_nls,
614 cifs_sb->mnt_cifs_flags &
615 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 616 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 617 if (direntry->d_inode)
9a53c3a7 618 drop_nlink(direntry->d_inode);
1da177e4
LT		 619 }
620 } else if (rc == -EACCES) {
621 /* try only if r/o attribute set in local lookup data? */
a048d7a8 622 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
1da177e4 623 if (pinfo_buf) {
1da177e4
LT		 624 /* ATTRS set to normal clears r/o bit */
625 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
626 if (!(pTcon->ses->flags & CIFS_SES_NT4))
627 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
628 pinfo_buf,
737b758c
SF		 629 cifs_sb->local_nls,
630 cifs_sb->mnt_cifs_flags &
631 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 632 else
633 rc = -EOPNOTSUPP;
634
635 if (rc == -EOPNOTSUPP) {
636 int oplock = FALSE;
637 __u16 netfid;
638 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
639 full_path,
640 (__u16)ATTR_NORMAL,
641 cifs_sb->local_nls);
642 For some strange reason it seems that NT4 eats the
643 old setattr call without actually setting the
644 attributes so on to the third attempted workaround
645 */
646
647 /* BB could scan to see if we already have it open
648 and pass in pid of opener to function */
649 rc = CIFSSMBOpen(xid, pTcon, full_path,
650 FILE_OPEN, SYNCHRONIZE |
651 FILE_WRITE_ATTRIBUTES, 0,
652 &netfid, &oplock, NULL,
737b758c
SF		 653 cifs_sb->local_nls,
654 cifs_sb->mnt_cifs_flags &
655 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 656 if (rc==0) {
657 rc = CIFSSMBSetFileTimes(xid, pTcon,
658 pinfo_buf,
659 netfid);
660 CIFSSMBClose(xid, pTcon, netfid);
661 }
662 }
663 kfree(pinfo_buf);
664 }
665 if (rc==0) {
737b758c
SF		 666 rc = CIFSSMBDelFile(xid, pTcon, full_path,
667 cifs_sb->local_nls,
668 cifs_sb->mnt_cifs_flags &
669 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 670 if (!rc) {
d0d2f2df 671 if (direntry->d_inode)
9a53c3a7 672 drop_nlink(direntry->d_inode);
1da177e4
LT		 673 } else if (rc == -ETXTBSY) {
674 int oplock = FALSE;
675 __u16 netfid;
676
677 rc = CIFSSMBOpen(xid, pTcon, full_path,
678 FILE_OPEN, DELETE,
679 CREATE_NOT_DIR |
680 CREATE_DELETE_ON_CLOSE,
681 &netfid, &oplock, NULL,
737b758c
SF		 682 cifs_sb->local_nls,
683 cifs_sb->mnt_cifs_flags &
684 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 685 if (rc==0) {
686 CIFSSMBRenameOpenFile(xid, pTcon,
687 netfid, NULL,
737b758c
SF		 688 cifs_sb->local_nls,
689 cifs_sb->mnt_cifs_flags &
690 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 691 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 692 if (direntry->d_inode)
9a53c3a7 693 drop_nlink(direntry->d_inode);
1da177e4
LT		 694 }
695 /* BB if rc = -ETXTBUSY goto the rename logic BB */
696 }
697 }
698 }
d0d2f2df 699 if (direntry->d_inode) {
b2aeb9d5
SF		 700 cifsInode = CIFS_I(direntry->d_inode);
701 cifsInode->time = 0; /* will force revalidate to get info
702 when needed */
703 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
704 }
06bcfedd
SF		 705 if(inode) {
706 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
707 cifsInode = CIFS_I(inode);
708 cifsInode->time = 0; /* force revalidate of dir as well */
709 }
1da177e4
LT		 710
711 kfree(full_path);
712 FreeXid(xid);
713 return rc;
714}
715
716int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
717{
718 int rc = 0;
719 int xid;
720 struct cifs_sb_info *cifs_sb;
721 struct cifsTconInfo *pTcon;
722 char *full_path = NULL;
723 struct inode *newinode = NULL;
724
6473a559 725 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
1da177e4
LT		 726
727 xid = GetXid();
728
729 cifs_sb = CIFS_SB(inode->i_sb);
730 pTcon = cifs_sb->tcon;
731
7f57356b 732 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 733 if (full_path == NULL) {
734 FreeXid(xid);
735 return -ENOMEM;
736 }
737 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 738 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
739 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 740 if (rc) {
26a21b98 741 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1da177e4
LT		 742 d_drop(direntry);
743 } else {
d8c76e6f 744 inc_nlink(inode);
1da177e4
LT		 745 if (pTcon->ses->capabilities & CAP_UNIX)
746 rc = cifs_get_inode_info_unix(&newinode, full_path,
747 inode->i_sb,xid);
748 else
749 rc = cifs_get_inode_info(&newinode, full_path, NULL,
750 inode->i_sb,xid);
751
b92327fe
SF		 752 if (pTcon->nocase)
753 direntry->d_op = &cifs_ci_dentry_ops;
754 else
755 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 756 d_instantiate(direntry, newinode);
757 if (direntry->d_inode)
758 direntry->d_inode->i_nlink = 2;
759 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 760 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 761 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
762 mode,
83451879
SF		 763 (__u64)current->fsuid,
764 (__u64)current->fsgid,
1da177e4 765 0 /* dev_t */,
737b758c
SF		 766 cifs_sb->local_nls,
767 cifs_sb->mnt_cifs_flags &
768 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 769 } else {
770 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
771 mode, (__u64)-1,
772 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 773 cifs_sb->local_nls,
774 cifs_sb->mnt_cifs_flags &
775 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 776 }
777 else {
778 /* BB to be implemented via Windows secrty descriptors
779 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
780 -1, -1, local_nls); */
6473a559
SF		 781 if(direntry->d_inode) {
782 direntry->d_inode->i_mode = mode;
25741b3e 783 direntry->d_inode->i_mode |= S_IFDIR;
6473a559
SF		 784 if(cifs_sb->mnt_cifs_flags &
785 CIFS_MOUNT_SET_UID) {
786 direntry->d_inode->i_uid =
787 current->fsuid;
788 direntry->d_inode->i_gid =
789 current->fsgid;
790 }
791 }
2a138ebb 792 }
1da177e4
LT		 793 }
794 kfree(full_path);
795 FreeXid(xid);
796 return rc;
797}
798
799int cifs_rmdir(struct inode *inode, struct dentry *direntry)
800{
801 int rc = 0;
802 int xid;
803 struct cifs_sb_info *cifs_sb;
804 struct cifsTconInfo *pTcon;
805 char *full_path = NULL;
806 struct cifsInodeInfo *cifsInode;
807
26a21b98 808 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1da177e4
LT		 809
810 xid = GetXid();
811
812 cifs_sb = CIFS_SB(inode->i_sb);
813 pTcon = cifs_sb->tcon;
814
7f57356b 815 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 816 if (full_path == NULL) {
817 FreeXid(xid);
818 return -ENOMEM;
819 }
820
737b758c
SF		 821 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
822 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 823
824 if (!rc) {
9a53c3a7 825 drop_nlink(inode);
1da177e4 826 i_size_write(direntry->d_inode,0);
ce71ec36 827 clear_nlink(direntry->d_inode);
1da177e4
LT		 828 }
829
830 cifsInode = CIFS_I(direntry->d_inode);
831 cifsInode->time = 0; /* force revalidate to go get info when
832 needed */
833 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
834 current_fs_time(inode->i_sb);
835
836 kfree(full_path);
837 FreeXid(xid);
838 return rc;
839}
840
841int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
842 struct inode *target_inode, struct dentry *target_direntry)
843{
844 char *fromName;
845 char *toName;
846 struct cifs_sb_info *cifs_sb_source;
847 struct cifs_sb_info *cifs_sb_target;
848 struct cifsTconInfo *pTcon;
849 int xid;
850 int rc = 0;
851
852 xid = GetXid();
853
854 cifs_sb_target = CIFS_SB(target_inode->i_sb);
855 cifs_sb_source = CIFS_SB(source_inode->i_sb);
856 pTcon = cifs_sb_source->tcon;
857
858 if (pTcon != cifs_sb_target->tcon) {
859 FreeXid(xid);
860 return -EXDEV; /* BB actually could be allowed if same server,
861 but different share.
862 Might eventually add support for this */
863 }
864
865 /* we already have the rename sem so we do not need to grab it again
866 here to protect the path integrity */
7f57356b
SF		 867 fromName = build_path_from_dentry(source_direntry);
868 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 869 if ((fromName == NULL) || (toName == NULL)) {
870 rc = -ENOMEM;
871 goto cifs_rename_exit;
872 }
873
874 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 875 cifs_sb_source->local_nls,
876 cifs_sb_source->mnt_cifs_flags &
877 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 878 if (rc == -EEXIST) {
879 /* check if they are the same file because rename of hardlinked
880 files is a noop */
881 FILE_UNIX_BASIC_INFO *info_buf_source;
882 FILE_UNIX_BASIC_INFO *info_buf_target;
883
884 info_buf_source =
885 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
886 if (info_buf_source != NULL) {
887 info_buf_target = info_buf_source + 1;
888 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 889 info_buf_source, cifs_sb_source->local_nls,
890 cifs_sb_source->mnt_cifs_flags &
891 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 892 if (rc == 0) {
893 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
894 info_buf_target,
737b758c
SF		 895 cifs_sb_target->local_nls,
896 /* remap based on source sb */
897 cifs_sb_source->mnt_cifs_flags &
898 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 899 }
900 if ((rc == 0) &&
901 (info_buf_source->UniqueId ==
902 info_buf_target->UniqueId)) {
903 /* do not rename since the files are hardlinked which
904 is a noop */
905 } else {
906 /* we either can not tell the files are hardlinked
907 (as with Windows servers) or files are not
908 hardlinked so delete the target manually before
909 renaming to follow POSIX rather than Windows
910 semantics */
911 cifs_unlink(target_inode, target_direntry);
912 rc = CIFSSMBRename(xid, pTcon, fromName,
913 toName,
737b758c
SF		 914 cifs_sb_source->local_nls,
915 cifs_sb_source->mnt_cifs_flags
916 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 917 }
918 kfree(info_buf_source);
919 } /* if we can not get memory just leave rc as EEXIST */
920 }
921
922 if (rc) {
923 cFYI(1, ("rename rc %d", rc));
924 }
925
926 if ((rc == -EIO) || (rc == -EEXIST)) {
927 int oplock = FALSE;
928 __u16 netfid;
929
930 /* BB FIXME Is Generic Read correct for rename? */
931 /* if renaming directory - we should not say CREATE_NOT_DIR,
932 need to test renaming open directory, also GENERIC_READ
933 might not right be right access to request */
934 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
935 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 936 cifs_sb_source->local_nls,
937 cifs_sb_source->mnt_cifs_flags &
938 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 939 if (rc==0) {
940 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 941 cifs_sb_source->local_nls,
942 cifs_sb_source->mnt_cifs_flags &
943 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 944 CIFSSMBClose(xid, pTcon, netfid);
945 }
946 }
947
948cifs_rename_exit:
949 kfree(fromName);
950 kfree(toName);
951 FreeXid(xid);
952 return rc;
953}
954
955int cifs_revalidate(struct dentry *direntry)
956{
957 int xid;
958 int rc = 0;
959 char *full_path;
960 struct cifs_sb_info *cifs_sb;
961 struct cifsInodeInfo *cifsInode;
962 loff_t local_size;
963 struct timespec local_mtime;
964 int invalidate_inode = FALSE;
965
966 if (direntry->d_inode == NULL)
967 return -ENOENT;
968
969 cifsInode = CIFS_I(direntry->d_inode);
970
971 if (cifsInode == NULL)
972 return -ENOENT;
973
974 /* no sense revalidating inode info on file that no one can write */
975 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
976 return rc;
977
978 xid = GetXid();
979
980 cifs_sb = CIFS_SB(direntry->d_sb);
981
982 /* can not safely grab the rename sem here if rename calls revalidate
983 since that would deadlock */
7f57356b 984 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 985 if (full_path == NULL) {
986 FreeXid(xid);
987 return -ENOMEM;
988 }
989 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
990 "jiffies %ld", full_path, direntry->d_inode,
991 direntry->d_inode->i_count.counter, direntry,
992 direntry->d_time, jiffies));
993
994 if (cifsInode->time == 0) {
995 /* was set to zero previously to force revalidate */
996 } else if (time_before(jiffies, cifsInode->time + HZ) &&
997 lookupCacheEnabled) {
998 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
999 (direntry->d_inode->i_nlink == 1)) {
1000 kfree(full_path);
1001 FreeXid(xid);
1002 return rc;
1003 } else {
1004 cFYI(1, ("Have to revalidate file due to hardlinks"));
1005 }
1006 }
1007
1008 /* save mtime and size */
1009 local_mtime = direntry->d_inode->i_mtime;
1010 local_size = direntry->d_inode->i_size;
1011
1012 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1013 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1014 direntry->d_sb,xid);
1015 if (rc) {
1016 cFYI(1, ("error on getting revalidate info %d", rc));
1017/* if (rc != -ENOENT)
1018 rc = 0; */ /* BB should we cache info on
1019 certain errors? */
1020 }
1021 } else {
1022 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1023 direntry->d_sb,xid);
1024 if (rc) {
1025 cFYI(1, ("error on getting revalidate info %d", rc));
1026/* if (rc != -ENOENT)
1027 rc = 0; */ /* BB should we cache info on
1028 certain errors? */
1029 }
1030 }
1031 /* should we remap certain errors, access denied?, to zero */
1032
1033 /* if not oplocked, we invalidate inode pages if mtime or file size
1034 had changed on server */
1035
1036 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1037 (local_size == direntry->d_inode->i_size)) {
1038 cFYI(1, ("cifs_revalidate - inode unchanged"));
1039 } else {
1040 /* file may have changed on server */
1041 if (cifsInode->clientCanCacheRead) {
1042 /* no need to invalidate inode pages since we were the
1043 only ones who could have modified the file and the
1044 server copy is staler than ours */
1045 } else {
1046 invalidate_inode = TRUE;
1047 }
1048 }
1049
1050 /* can not grab this sem since kernel filesys locking documentation
1b1dcc1b
JS		 1051 indicates i_mutex may be taken by the kernel on lookup and rename
1052 which could deadlock if we grab the i_mutex here as well */
1053/* mutex_lock(&direntry->d_inode->i_mutex);*/
1da177e4
LT		 1054 /* need to write out dirty pages here */
1055 if (direntry->d_inode->i_mapping) {
1056 /* do we need to lock inode until after invalidate completes
1057 below? */
1058 filemap_fdatawrite(direntry->d_inode->i_mapping);
1059 }
1060 if (invalidate_inode) {
3abb9272
SF		 1061 /* shrink_dcache not necessary now that cifs dentry ops
1062 are exported for negative dentries */
1063/* if(S_ISDIR(direntry->d_inode->i_mode))
1064 shrink_dcache_parent(direntry); */
1065 if (S_ISREG(direntry->d_inode->i_mode)) {
1066 if (direntry->d_inode->i_mapping)
1067 filemap_fdatawait(direntry->d_inode->i_mapping);
1068 /* may eventually have to do this for open files too */
1069 if (list_empty(&(cifsInode->openFileList))) {
1070 /* changed on server - flush read ahead pages */
1071 cFYI(1, ("Invalidating read ahead data on "
1072 "closed file"));
1073 invalidate_remote_inode(direntry->d_inode);
1074 }
1da177e4
LT		 1075 }
1076 }
1b1dcc1b 1077/* mutex_unlock(&direntry->d_inode->i_mutex); */
1da177e4
LT		 1078
1079 kfree(full_path);
1080 FreeXid(xid);
1081 return rc;
1082}
1083
1084int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1085 struct kstat *stat)
1086{
1087 int err = cifs_revalidate(dentry);
1088 if (!err)
1089 generic_fillattr(dentry->d_inode, stat);
1090 return err;
1091}
1092
1093static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1094{
1095 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1096 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1097 struct page *page;
1098 char *kaddr;
1099 int rc = 0;
1100
1101 page = grab_cache_page(mapping, index);
1102 if (!page)
1103 return -ENOMEM;
1104
1105 kaddr = kmap_atomic(page, KM_USER0);
1106 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1107 flush_dcache_page(page);
1108 kunmap_atomic(kaddr, KM_USER0);
1109 unlock_page(page);
1110 page_cache_release(page);
1111 return rc;
1112}
1113
1114int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1115{
1116 int xid;
1117 struct cifs_sb_info *cifs_sb;
1118 struct cifsTconInfo *pTcon;
1119 char *full_path = NULL;
1120 int rc = -EACCES;
1da177e4
LT		 1121 struct cifsFileInfo *open_file = NULL;
1122 FILE_BASIC_INFO time_buf;
1123 int set_time = FALSE;
1124 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1125 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1126 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1127 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1128
1129 xid = GetXid();
1130
3979877e 1131 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1da177e4 1132 direntry->d_name.name, attrs->ia_valid));
6473a559 1133
1da177e4
LT		 1134 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1135 pTcon = cifs_sb->tcon;
1136
2a138ebb 1137 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
6473a559
SF		 1138 /* check if we have permission to change attrs */
1139 rc = inode_change_ok(direntry->d_inode, attrs);
1140 if(rc < 0) {
1141 FreeXid(xid);
1142 return rc;
1143 } else
1144 rc = 0;
1145 }
1146
7f57356b 1147 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1148 if (full_path == NULL) {
1149 FreeXid(xid);
1150 return -ENOMEM;
1151 }
1152 cifsInode = CIFS_I(direntry->d_inode);
1153
1154 /* BB check if we need to refresh inode from server now ? BB */
1155
1156 /* need to flush data before changing file size on server */
28fd1298 1157 filemap_write_and_wait(direntry->d_inode->i_mapping);
1da177e4
LT		 1158
1159 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1160 /* To avoid spurious oplock breaks from server, in the case of
1161 inodes that we already have open, avoid doing path based
1162 setting of file size if we can do it by handle.
1163 This keeps our caching token (oplock) and avoids timeouts
1164 when the local oplock break takes longer to flush
1165 writebehind data than the SMB timeout for the SetPathInfo
1166 request would allow */
3979877e 1167
6148a742
SF		 1168 open_file = find_writable_file(cifsInode);
1169 if (open_file) {
1170 __u16 nfid = open_file->netfid;
1171 __u32 npid = open_file->pid;
1172 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1173 nfid, npid, FALSE);
23e7dd7d 1174 atomic_dec(&open_file->wrtPending);
6148a742 1175 cFYI(1,("SetFSize for attrs rc = %d", rc));
083d3a2c 1176 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
6148a742
SF		 1177 int bytes_written;
1178 rc = CIFSSMBWrite(xid, pTcon,
1179 nfid, 0, attrs->ia_size,
1180 &bytes_written, NULL, NULL,
1181 1 /* 45 seconds */);
1182 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4 1183 }
6473a559
SF		 1184 } else
1185 rc = -EINVAL;
1186
1da177e4
LT		 1187 if (rc != 0) {
1188 /* Set file size by pathname rather than by handle
1189 either because no valid, writeable file handle for
1190 it was found or because there was an error setting
1191 it by handle */
1192 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1193 attrs->ia_size, FALSE,
737b758c
SF		 1194 cifs_sb->local_nls,
1195 cifs_sb->mnt_cifs_flags &
1196 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a 1197 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
083d3a2c 1198 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
e30dcf3a
SF		 1199 __u16 netfid;
1200 int oplock = FALSE;
1201
1202 rc = SMBLegacyOpen(xid, pTcon, full_path,
1203 FILE_OPEN,
1204 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1205 CREATE_NOT_DIR, &netfid, &oplock,
1206 NULL, cifs_sb->local_nls,
1207 cifs_sb->mnt_cifs_flags &
1208 CIFS_MOUNT_MAP_SPECIAL_CHR);
1209 if (rc==0) {
1210 int bytes_written;
1211 rc = CIFSSMBWrite(xid, pTcon,
1212 netfid, 0,
1213 attrs->ia_size,
1214 &bytes_written, NULL,
1215 NULL, 1 /* 45 sec */);
1216 cFYI(1,("wrt seteof rc %d",rc));
1217 CIFSSMBClose(xid, pTcon, netfid);
1218 }
1219
1220 }
1da177e4
LT		 1221 }
1222
1223 /* Server is ok setting allocation size implicitly - no need
1224 to call:
1225 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1226 cifs_sb->local_nls);
1227 */
1228
1229 if (rc == 0) {
1230 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1231 cifs_truncate_page(direntry->d_inode->i_mapping,
1232 direntry->d_inode->i_size);
e30dcf3a
SF		 1233 } else
1234 goto cifs_setattr_exit;
1da177e4
LT		 1235 }
1236 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1237 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1238 uid = attrs->ia_uid;
1da177e4
LT		 1239 }
1240 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1241 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1242 gid = attrs->ia_gid;
1da177e4
LT		 1243 }
1244
1245 time_buf.Attributes = 0;
1246 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1247 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1248 mode = attrs->ia_mode;
1da177e4
LT		 1249 }
1250
1251 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1252 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1253 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1254 0 /* dev_t */, cifs_sb->local_nls,
1255 cifs_sb->mnt_cifs_flags &
1256 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 1257 else if (attrs->ia_valid & ATTR_MODE) {
cdbce9c8 1258 rc = 0;
1da177e4
LT		 1259 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1260 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1261 time_buf.Attributes =
1262 cpu_to_le32(cifsInode->cifsAttrs |
1263 ATTR_READONLY);
1264 } else if ((mode & S_IWUGO) == S_IWUGO) {
1265 if (cifsInode->cifsAttrs & ATTR_READONLY)
1266 time_buf.Attributes =
1267 cpu_to_le32(cifsInode->cifsAttrs &
1268 (~ATTR_READONLY));
1269 }
1270 /* BB to be implemented -
1271 via Windows security descriptors or streams */
1272 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1273 cifs_sb->local_nls); */
1274 }
1275
1276 if (attrs->ia_valid & ATTR_ATIME) {
1277 set_time = TRUE;
1278 time_buf.LastAccessTime =
1279 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1280 } else
1281 time_buf.LastAccessTime = 0;
1282
1283 if (attrs->ia_valid & ATTR_MTIME) {
1284 set_time = TRUE;
1285 time_buf.LastWriteTime =
1286 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1287 } else
1288 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1289 /* Do not set ctime explicitly unless other time
1290 stamps are changed explicitly (i.e. by utime()
1291 since we would then have a mix of client and
1292 server times */
1293
1294 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1295 set_time = TRUE;
e30dcf3a
SF		 1296 /* Although Samba throws this field away
1297 it may be useful to Windows - but we do
1298 not want to set ctime unless some other
1299 timestamp is changing */
26a21b98 1300 cFYI(1, ("CIFS - CTIME changed"));
1da177e4
LT		 1301 time_buf.ChangeTime =
1302 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1303 } else
1304 time_buf.ChangeTime = 0;
1305
1306 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1307 time_buf.CreationTime = 0; /* do not change */
1308 /* In the future we should experiment - try setting timestamps
1309 via Handle (SetFileInfo) instead of by path */
1310 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1311 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1312 cifs_sb->local_nls,
1313 cifs_sb->mnt_cifs_flags &
1314 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1315 else
1316 rc = -EOPNOTSUPP;
1317
1318 if (rc == -EOPNOTSUPP) {
1319 int oplock = FALSE;
1320 __u16 netfid;
1321
1322 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1323 "times not supported by this server"));
1324 /* BB we could scan to see if we already have it open
1325 and pass in pid of opener to function */
1326 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1327 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1328 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1329 NULL, cifs_sb->local_nls,
1330 cifs_sb->mnt_cifs_flags &
1331 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1332 if (rc==0) {
1333 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1334 netfid);
1335 CIFSSMBClose(xid, pTcon, netfid);
1336 } else {
1337 /* BB For even older servers we could convert time_buf
1338 into old DOS style which uses two second
1339 granularity */
1340
1341 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1342 &time_buf, cifs_sb->local_nls); */
1343 }
1344 }
e30dcf3a
SF		 1345 /* Even if error on time set, no sense failing the call if
1346 the server would set the time to a reasonable value anyway,
1347 and this check ensures that we are not being called from
1348 sys_utimes in which case we ought to fail the call back to
1349 the user when the server rejects the call */
1350 if((rc) && (attrs->ia_valid &&
1351 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1352 rc = 0;
1da177e4
LT		 1353 }
1354
1355 /* do not need local check to inode_check_ok since the server does
1356 that */
1357 if (!rc)
1358 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1359cifs_setattr_exit:
1da177e4
LT		 1360 kfree(full_path);
1361 FreeXid(xid);
1362 return rc;
1363}
1364
1365void cifs_delete_inode(struct inode *inode)
1366{
26a21b98 1367 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1da177e4
LT		 1368 /* may have to add back in if and when safe distributed caching of
1369 directories added e.g. via FindNotify */
1370}
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