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[CIFS] Missing parenthesis and typo in previous fix
[deliverable/linux.git] / fs / cifs / inode.c
CommitLineData
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>
22#include <linux/buffer_head.h>
23#include <linux/stat.h>
24#include <linux/pagemap.h>
25#include <asm/div64.h>
26#include "cifsfs.h"
27#include "cifspdu.h"
28#include "cifsglob.h"
29#include "cifsproto.h"
30#include "cifs_debug.h"
31#include "cifs_fs_sb.h"
32
33int cifs_get_inode_info_unix(struct inode **pinode,
34 const unsigned char *search_path, struct super_block *sb, int xid)
35{
36 int rc = 0;
37 FILE_UNIX_BASIC_INFO findData;
38 struct cifsTconInfo *pTcon;
39 struct inode *inode;
40 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
41 char *tmp_path;
42
43 pTcon = cifs_sb->tcon;
3020a1f5 44 cFYI(1, ("Getting info on %s ", search_path));
1da177e4
LT		 45 /* could have done a find first instead but this returns more info */
46 rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
737b758c
SF		 47 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
48 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 49/* dump_mem("\nUnixQPathInfo return data", &findData,
50 sizeof(findData)); */
51 if (rc) {
52 if (rc == -EREMOTE) {
53 tmp_path =
54 kmalloc(strnlen(pTcon->treeName,
55 MAX_TREE_SIZE + 1) +
56 strnlen(search_path, MAX_PATHCONF) + 1,
57 GFP_KERNEL);
58 if (tmp_path == NULL) {
59 return -ENOMEM;
60 }
61 /* have to skip first of the double backslash of
62 UNC name */
63 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
64 strncat(tmp_path, search_path, MAX_PATHCONF);
65 rc = connect_to_dfs_path(xid, pTcon->ses,
66 /* treename + */ tmp_path,
737b758c
SF		 67 cifs_sb->local_nls,
68 cifs_sb->mnt_cifs_flags &
69 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 70 kfree(tmp_path);
71
72 /* BB fix up inode etc. */
73 } else if (rc) {
74 return rc;
75 }
76 } else {
77 struct cifsInodeInfo *cifsInfo;
78 __u32 type = le32_to_cpu(findData.Type);
79 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
80 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
81
82 /* get new inode */
83 if (*pinode == NULL) {
84 *pinode = new_inode(sb);
d0d2f2df 85 if (*pinode == NULL)
1da177e4
LT		 86 return -ENOMEM;
87 /* Is an i_ino of zero legal? */
88 /* Are there sanity checks we can use to ensure that
89 the server is really filling in that field? */
d0d2f2df 90 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1da177e4
LT		 91 (*pinode)->i_ino =
92 (unsigned long)findData.UniqueId;
93 } /* note ino incremented to unique num in new_inode */
94 insert_inode_hash(*pinode);
95 }
96
97 inode = *pinode;
98 cifsInfo = CIFS_I(inode);
99
d6e2f2a4 100 cFYI(1, ("Old time %ld ", cifsInfo->time));
1da177e4 101 cifsInfo->time = jiffies;
d6e2f2a4 102 cFYI(1, ("New time %ld ", cifsInfo->time));
1da177e4
LT		 103 /* this is ok to set on every inode revalidate */
104 atomic_set(&cifsInfo->inUse,1);
105
106 inode->i_atime =
107 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
108 inode->i_mtime =
109 cifs_NTtimeToUnix(le64_to_cpu
110 (findData.LastModificationTime));
111 inode->i_ctime =
112 cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
113 inode->i_mode = le64_to_cpu(findData.Permissions);
3020a1f5
SF		 114 /* since we set the inode type below we need to mask off
115 to avoid strange results if bits set above */
116 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 117 if (type == UNIX_FILE) {
118 inode->i_mode |= S_IFREG;
119 } else if (type == UNIX_SYMLINK) {
120 inode->i_mode |= S_IFLNK;
121 } else if (type == UNIX_DIR) {
122 inode->i_mode |= S_IFDIR;
123 } else if (type == UNIX_CHARDEV) {
124 inode->i_mode |= S_IFCHR;
125 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
126 le64_to_cpu(findData.DevMinor) & MINORMASK);
127 } else if (type == UNIX_BLOCKDEV) {
128 inode->i_mode |= S_IFBLK;
129 inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
130 le64_to_cpu(findData.DevMinor) & MINORMASK);
131 } else if (type == UNIX_FIFO) {
132 inode->i_mode |= S_IFIFO;
133 } else if (type == UNIX_SOCKET) {
134 inode->i_mode |= S_IFSOCK;
3020a1f5
SF		 135 } else {
136 /* safest to call it a file if we do not know */
137 inode->i_mode |= S_IFREG;
138 cFYI(1,("unknown type %d",type));
1da177e4
LT		 139 }
140 inode->i_uid = le64_to_cpu(findData.Uid);
141 inode->i_gid = le64_to_cpu(findData.Gid);
142 inode->i_nlink = le64_to_cpu(findData.Nlinks);
143
d0d2f2df 144 if (is_size_safe_to_change(cifsInfo)) {
1da177e4
LT		 145 /* can not safely change the file size here if the
146 client is writing to it due to potential races */
147
148 i_size_write(inode, end_of_file);
149
150 /* blksize needs to be multiple of two. So safer to default to
151 blksize and blkbits set in superblock so 2**blkbits and blksize
152 will match rather than setting to:
153 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
154
155 /* This seems incredibly stupid but it turns out that i_blocks
156 is not related to (i_size / i_blksize), instead 512 byte size
157 is required for calculating num blocks */
158
159 /* 512 bytes (2**9) is the fake blocksize that must be used */
160 /* for this calculation */
161 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
162 }
163
164 if (num_of_bytes < end_of_file)
8b94bcb9 165 cFYI(1, ("allocation size less than end of file"));
1da177e4
LT		 166 cFYI(1,
167 ("Size %ld and blocks %ld",
168 (unsigned long) inode->i_size, inode->i_blocks));
169 if (S_ISREG(inode->i_mode)) {
8b94bcb9 170 cFYI(1, ("File inode"));
1da177e4 171 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 172 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
173 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
174 inode->i_fop =
175 &cifs_file_direct_nobrl_ops;
176 else
177 inode->i_fop = &cifs_file_direct_ops;
178 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
179 inode->i_fop = &cifs_file_nobrl_ops;
180 else /* not direct, send byte range locks */
1da177e4 181 inode->i_fop = &cifs_file_ops;
8b94bcb9 182
1da177e4 183 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 184 /* check if server can support readpages */
185 if(pTcon->ses->server->maxBuf <
186 4096 + MAX_CIFS_HDR_SIZE)
187 inode->i_data.a_ops->readpages = NULL;
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) {
232 /* Read header */
233 rc = CIFSSMBRead(xid, pTcon,
234 netfid,
86c96b4b 235 24 /* length */, 0 /* offset */,
d6e2f2a4 236 &bytes_read, &pbuf);
86c96b4b 237 if((rc == 0) && (bytes_read >= 8)) {
9e294f1c
SF		 238 if(memcmp("IntxBLK", pbuf, 8) == 0) {
239 cFYI(1,("Block device"));
3020a1f5 240 inode->i_mode |= S_IFBLK;
86c96b4b
SF		 241 if(bytes_read == 24) {
242 /* we have enough to decode dev num */
243 __u64 mjr; /* major */
244 __u64 mnr; /* minor */
245 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
246 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
247 inode->i_rdev = MKDEV(mjr, mnr);
248 }
9e294f1c
SF		 249 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
250 cFYI(1,("Char device"));
3020a1f5 251 inode->i_mode |= S_IFCHR;
86c96b4b
SF		 252 if(bytes_read == 24) {
253 /* we have enough to decode dev num */
254 __u64 mjr; /* major */
255 __u64 mnr; /* minor */
256 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
257 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
258 inode->i_rdev = MKDEV(mjr, mnr);
259 }
9e294f1c
SF		 260 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
261 cFYI(1,("Symlink"));
3020a1f5 262 inode->i_mode |= S_IFLNK;
86c96b4b
SF		 263 } else {
264 inode->i_mode |= S_IFREG; /* file? */
265 rc = -EOPNOTSUPP;
266 }
3020a1f5
SF		 267 } else {
268 inode->i_mode |= S_IFREG; /* then it is a file */
269 rc = -EOPNOTSUPP; /* or some unknown SFU type */
d6e2f2a4 270 }
d6e2f2a4 271 CIFSSMBClose(xid, pTcon, netfid);
d6e2f2a4
SF		 272 }
273 return rc;
274
275}
276
9e294f1c
SF		 277#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
278
279static int get_sfu_uid_mode(struct inode * inode,
280 const unsigned char *path,
281 struct cifs_sb_info *cifs_sb, int xid)
282{
3020a1f5 283#ifdef CONFIG_CIFS_XATTR
9e294f1c
SF		 284 ssize_t rc;
285 char ea_value[4];
286 __u32 mode;
287
288 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
289 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
290 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
291 if(rc < 0)
292 return (int)rc;
293 else if (rc > 3) {
294 mode = le32_to_cpu(*((__le32 *)ea_value));
c119b87d 295 inode->i_mode &= ~SFBITS_MASK;
3020a1f5 296 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
9e294f1c
SF		 297 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
298 cFYI(1,("special mode bits 0%o", mode));
299 return 0;
300 } else {
301 return 0;
302 }
3020a1f5
SF		 303#else
304 return -EOPNOTSUPP;
305#endif
306
9e294f1c
SF		 307
308}
309
1da177e4
LT		 310int cifs_get_inode_info(struct inode **pinode,
311 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
312 struct super_block *sb, int xid)
313{
314 int rc = 0;
315 struct cifsTconInfo *pTcon;
316 struct inode *inode;
317 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
318 char *tmp_path;
319 char *buf = NULL;
320
321 pTcon = cifs_sb->tcon;
d6e2f2a4 322 cFYI(1,("Getting info on %s", search_path));
1da177e4 323
d0d2f2df
SF		 324 if ((pfindData == NULL) && (*pinode != NULL)) {
325 if (CIFS_I(*pinode)->clientCanCacheRead) {
1da177e4
LT		 326 cFYI(1,("No need to revalidate cached inode sizes"));
327 return rc;
328 }
329 }
330
331 /* if file info not passed in then get it from server */
d0d2f2df 332 if (pfindData == NULL) {
1da177e4 333 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 334 if (buf == NULL)
1da177e4
LT		 335 return -ENOMEM;
336 pfindData = (FILE_ALL_INFO *)buf;
337 /* could do find first instead but this returns more info */
338 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
6b8edfe0 339 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 340 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 341 /* BB optimize code so we do not make the above call
342 when server claims no NT SMB support and the above call
343 failed at least once - set flag in tcon or mount */
344 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
345 rc = SMBQueryInformation(xid, pTcon, search_path,
346 pfindData, cifs_sb->local_nls,
347 cifs_sb->mnt_cifs_flags &
348 CIFS_MOUNT_MAP_SPECIAL_CHR);
349 }
350
1da177e4
LT		 351 }
352 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
353 if (rc) {
354 if (rc == -EREMOTE) {
355 tmp_path =
356 kmalloc(strnlen
357 (pTcon->treeName,
358 MAX_TREE_SIZE + 1) +
359 strnlen(search_path, MAX_PATHCONF) + 1,
360 GFP_KERNEL);
361 if (tmp_path == NULL) {
362 kfree(buf);
363 return -ENOMEM;
364 }
365
366 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
367 strncat(tmp_path, search_path, MAX_PATHCONF);
368 rc = connect_to_dfs_path(xid, pTcon->ses,
369 /* treename + */ tmp_path,
737b758c
SF		 370 cifs_sb->local_nls,
371 cifs_sb->mnt_cifs_flags &
372 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 373 kfree(tmp_path);
374 /* BB fix up inode etc. */
375 } else if (rc) {
376 kfree(buf);
377 return rc;
378 }
379 } else {
380 struct cifsInodeInfo *cifsInfo;
381 __u32 attr = le32_to_cpu(pfindData->Attributes);
382
383 /* get new inode */
384 if (*pinode == NULL) {
385 *pinode = new_inode(sb);
386 if (*pinode == NULL)
387 return -ENOMEM;
388 /* Is an i_ino of zero legal? Can we use that to check
389 if the server supports returning inode numbers? Are
390 there other sanity checks we can use to ensure that
391 the server is really filling in that field? */
392
393 /* We can not use the IndexNumber field by default from
394 Windows or Samba (in ALL_INFO buf) but we can request
395 it explicitly. It may not be unique presumably if
396 the server has multiple devices mounted under one
397 share */
398
399 /* There may be higher info levels that work but are
400 there Windows server or network appliances for which
401 IndexNumber field is not guaranteed unique? */
402
d0d2f2df 403 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
1da177e4
LT		 404 int rc1 = 0;
405 __u64 inode_num;
406
407 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
408 search_path, &inode_num,
737b758c
SF		 409 cifs_sb->local_nls,
410 cifs_sb->mnt_cifs_flags &
411 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 412 if (rc1) {
1da177e4
LT		 413 cFYI(1,("GetSrvInodeNum rc %d", rc1));
414 /* BB EOPNOSUPP disable SERVER_INUM? */
415 } else /* do we need cast or hash to ino? */
416 (*pinode)->i_ino = inode_num;
417 } /* else ino incremented to unique num in new_inode*/
1da177e4
LT		 418 insert_inode_hash(*pinode);
419 }
420 inode = *pinode;
421 cifsInfo = CIFS_I(inode);
422 cifsInfo->cifsAttrs = attr;
3020a1f5 423 cFYI(1, ("Old time %ld ", cifsInfo->time));
1da177e4 424 cifsInfo->time = jiffies;
3020a1f5 425 cFYI(1, ("New time %ld ", cifsInfo->time));
1da177e4
LT		 426
427 /* blksize needs to be multiple of two. So safer to default to
428 blksize and blkbits set in superblock so 2**blkbits and blksize
429 will match rather than setting to:
430 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
431
432 /* Linux can not store file creation time unfortunately so we ignore it */
433 inode->i_atime =
434 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
435 inode->i_mtime =
436 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
437 inode->i_ctime =
438 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
3020a1f5 439 cFYI(0, ("Attributes came in as 0x%x ", attr));
1da177e4
LT		 440
441 /* set default mode. will override for dirs below */
442 if (atomic_read(&cifsInfo->inUse) == 0)
443 /* new inode, can safely set these fields */
444 inode->i_mode = cifs_sb->mnt_file_mode;
3020a1f5
SF		 445 else /* since we set the inode type below we need to mask off
446 to avoid strange results if type changes and both get orred in */
447 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 448/* if (attr & ATTR_REPARSE) */
449 /* We no longer handle these as symlinks because we could not
450 follow them due to the absolute path with drive letter */
451 if (attr & ATTR_DIRECTORY) {
452 /* override default perms since we do not do byte range locking
453 on dirs */
454 inode->i_mode = cifs_sb->mnt_dir_mode;
455 inode->i_mode |= S_IFDIR;
eda3c029
SF		 456 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
457 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
458 /* No need to le64 convert size of zero */
459 (pfindData->EndOfFile == 0)) {
460 inode->i_mode = cifs_sb->mnt_file_mode;
461 inode->i_mode |= S_IFIFO;
d6e2f2a4
SF		 462/* BB Finish for SFU style symlinks and devices */
463 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
464 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
465 if (decode_sfu_inode(inode,
466 le64_to_cpu(pfindData->EndOfFile),
467 search_path,
468 cifs_sb, xid)) {
469 cFYI(1,("Unrecognized sfu inode type"));
470 }
3020a1f5 471 cFYI(1,("sfu mode 0%o",inode->i_mode));
1da177e4
LT		 472 } else {
473 inode->i_mode |= S_IFREG;
474 /* treat the dos attribute of read-only as read-only
475 mode e.g. 555 */
476 if (cifsInfo->cifsAttrs & ATTR_READONLY)
477 inode->i_mode &= ~(S_IWUGO);
478 /* BB add code here -
479 validate if device or weird share or device type? */
480 }
481 if (is_size_safe_to_change(cifsInfo)) {
482 /* can not safely change the file size here if the
483 client is writing to it due to potential races */
484 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
485
486 /* 512 bytes (2**9) is the fake blocksize that must be
487 used for this calculation */
488 inode->i_blocks = (512 - 1 + le64_to_cpu(
489 pfindData->AllocationSize)) >> 9;
490 }
491
492 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
493
494 /* BB fill in uid and gid here? with help from winbind?
495 or retrieve from NTFS stream extended attribute */
9e294f1c
SF		 496 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
497 /* fill in uid, gid, mode from server ACL */
498 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
499 } else if (atomic_read(&cifsInfo->inUse) == 0) {
1da177e4
LT		 500 inode->i_uid = cifs_sb->mnt_uid;
501 inode->i_gid = cifs_sb->mnt_gid;
502 /* set so we do not keep refreshing these fields with
503 bad data after user has changed them in memory */
504 atomic_set(&cifsInfo->inUse,1);
505 }
506
507 if (S_ISREG(inode->i_mode)) {
d6e2f2a4 508 cFYI(1, ("File inode"));
1da177e4 509 inode->i_op = &cifs_file_inode_ops;
8b94bcb9
SF		 510 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
511 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
512 inode->i_fop =
513 &cifs_file_direct_nobrl_ops;
514 else
515 inode->i_fop = &cifs_file_direct_ops;
516 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
517 inode->i_fop = &cifs_file_nobrl_ops;
518 else /* not direct, send byte range locks */
1da177e4 519 inode->i_fop = &cifs_file_ops;
8b94bcb9 520
1da177e4 521 inode->i_data.a_ops = &cifs_addr_ops;
bfa0d75a
SF		 522 if(pTcon->ses->server->maxBuf <
523 4096 + MAX_CIFS_HDR_SIZE)
524 inode->i_data.a_ops->readpages = NULL;
1da177e4 525 } else if (S_ISDIR(inode->i_mode)) {
d6e2f2a4 526 cFYI(1, ("Directory inode"));
1da177e4
LT		 527 inode->i_op = &cifs_dir_inode_ops;
528 inode->i_fop = &cifs_dir_ops;
529 } else if (S_ISLNK(inode->i_mode)) {
d6e2f2a4 530 cFYI(1, ("Symbolic Link inode"));
1da177e4
LT		 531 inode->i_op = &cifs_symlink_inode_ops;
532 } else {
533 init_special_inode(inode, inode->i_mode,
534 inode->i_rdev);
535 }
536 }
537 kfree(buf);
538 return rc;
539}
540
541/* gets root inode */
542void cifs_read_inode(struct inode *inode)
543{
544 int xid;
545 struct cifs_sb_info *cifs_sb;
546
547 cifs_sb = CIFS_SB(inode->i_sb);
548 xid = GetXid();
549 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
550 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
551 else
552 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
553 /* can not call macro FreeXid here since in a void func */
554 _FreeXid(xid);
555}
556
557int cifs_unlink(struct inode *inode, struct dentry *direntry)
558{
559 int rc = 0;
560 int xid;
561 struct cifs_sb_info *cifs_sb;
562 struct cifsTconInfo *pTcon;
563 char *full_path = NULL;
564 struct cifsInodeInfo *cifsInode;
565 FILE_BASIC_INFO *pinfo_buf;
566
3020a1f5 567 cFYI(1, ("cifs_unlink, inode = 0x%p with ", inode));
1da177e4
LT		 568
569 xid = GetXid();
570
571 cifs_sb = CIFS_SB(inode->i_sb);
572 pTcon = cifs_sb->tcon;
573
574 /* Unlink can be called from rename so we can not grab the sem here
575 since we deadlock otherwise */
576/* down(&direntry->d_sb->s_vfs_rename_sem);*/
7f57356b 577 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 578/* up(&direntry->d_sb->s_vfs_rename_sem);*/
579 if (full_path == NULL) {
580 FreeXid(xid);
581 return -ENOMEM;
582 }
737b758c
SF		 583 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
584 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 585
586 if (!rc) {
d0d2f2df 587 if (direntry->d_inode)
b2aeb9d5 588 direntry->d_inode->i_nlink--;
1da177e4
LT		 589 } else if (rc == -ENOENT) {
590 d_drop(direntry);
591 } else if (rc == -ETXTBSY) {
592 int oplock = FALSE;
593 __u16 netfid;
594
595 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
596 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c
SF		 597 &netfid, &oplock, NULL, cifs_sb->local_nls,
598 cifs_sb->mnt_cifs_flags &
599 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 600 if (rc==0) {
601 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
737b758c
SF		 602 cifs_sb->local_nls,
603 cifs_sb->mnt_cifs_flags &
604 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 605 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 606 if (direntry->d_inode)
b2aeb9d5 607 direntry->d_inode->i_nlink--;
1da177e4
LT		 608 }
609 } else if (rc == -EACCES) {
610 /* try only if r/o attribute set in local lookup data? */
611 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
612 if (pinfo_buf) {
613 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
614 /* ATTRS set to normal clears r/o bit */
615 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
616 if (!(pTcon->ses->flags & CIFS_SES_NT4))
617 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
618 pinfo_buf,
737b758c
SF		 619 cifs_sb->local_nls,
620 cifs_sb->mnt_cifs_flags &
621 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 622 else
623 rc = -EOPNOTSUPP;
624
625 if (rc == -EOPNOTSUPP) {
626 int oplock = FALSE;
627 __u16 netfid;
628 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
629 full_path,
630 (__u16)ATTR_NORMAL,
631 cifs_sb->local_nls);
632 For some strange reason it seems that NT4 eats the
633 old setattr call without actually setting the
634 attributes so on to the third attempted workaround
635 */
636
637 /* BB could scan to see if we already have it open
638 and pass in pid of opener to function */
639 rc = CIFSSMBOpen(xid, pTcon, full_path,
640 FILE_OPEN, SYNCHRONIZE |
641 FILE_WRITE_ATTRIBUTES, 0,
642 &netfid, &oplock, NULL,
737b758c
SF		 643 cifs_sb->local_nls,
644 cifs_sb->mnt_cifs_flags &
645 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 646 if (rc==0) {
647 rc = CIFSSMBSetFileTimes(xid, pTcon,
648 pinfo_buf,
649 netfid);
650 CIFSSMBClose(xid, pTcon, netfid);
651 }
652 }
653 kfree(pinfo_buf);
654 }
655 if (rc==0) {
737b758c
SF		 656 rc = CIFSSMBDelFile(xid, pTcon, full_path,
657 cifs_sb->local_nls,
658 cifs_sb->mnt_cifs_flags &
659 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 660 if (!rc) {
d0d2f2df 661 if (direntry->d_inode)
b2aeb9d5 662 direntry->d_inode->i_nlink--;
1da177e4
LT		 663 } else if (rc == -ETXTBSY) {
664 int oplock = FALSE;
665 __u16 netfid;
666
667 rc = CIFSSMBOpen(xid, pTcon, full_path,
668 FILE_OPEN, DELETE,
669 CREATE_NOT_DIR |
670 CREATE_DELETE_ON_CLOSE,
671 &netfid, &oplock, NULL,
737b758c
SF		 672 cifs_sb->local_nls,
673 cifs_sb->mnt_cifs_flags &
674 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 675 if (rc==0) {
676 CIFSSMBRenameOpenFile(xid, pTcon,
677 netfid, NULL,
737b758c
SF		 678 cifs_sb->local_nls,
679 cifs_sb->mnt_cifs_flags &
680 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 681 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 682 if (direntry->d_inode)
b2aeb9d5 683 direntry->d_inode->i_nlink--;
1da177e4
LT		 684 }
685 /* BB if rc = -ETXTBUSY goto the rename logic BB */
686 }
687 }
688 }
d0d2f2df 689 if (direntry->d_inode) {
b2aeb9d5
SF		 690 cifsInode = CIFS_I(direntry->d_inode);
691 cifsInode->time = 0; /* will force revalidate to get info
692 when needed */
693 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
694 }
695 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
1da177e4
LT		 696 cifsInode = CIFS_I(inode);
697 cifsInode->time = 0; /* force revalidate of dir as well */
698
699 kfree(full_path);
700 FreeXid(xid);
701 return rc;
702}
703
704int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
705{
706 int rc = 0;
707 int xid;
708 struct cifs_sb_info *cifs_sb;
709 struct cifsTconInfo *pTcon;
710 char *full_path = NULL;
711 struct inode *newinode = NULL;
712
6473a559 713 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
1da177e4
LT		 714
715 xid = GetXid();
716
717 cifs_sb = CIFS_SB(inode->i_sb);
718 pTcon = cifs_sb->tcon;
719
720 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 721 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 722 up(&inode->i_sb->s_vfs_rename_sem);
723 if (full_path == NULL) {
724 FreeXid(xid);
725 return -ENOMEM;
726 }
727 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 728 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
729 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 730 if (rc) {
731 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
732 d_drop(direntry);
733 } else {
734 inode->i_nlink++;
735 if (pTcon->ses->capabilities & CAP_UNIX)
736 rc = cifs_get_inode_info_unix(&newinode, full_path,
737 inode->i_sb,xid);
738 else
739 rc = cifs_get_inode_info(&newinode, full_path, NULL,
740 inode->i_sb,xid);
741
b92327fe
SF		 742 if (pTcon->nocase)
743 direntry->d_op = &cifs_ci_dentry_ops;
744 else
745 direntry->d_op = &cifs_dentry_ops;
1da177e4
LT		 746 d_instantiate(direntry, newinode);
747 if (direntry->d_inode)
748 direntry->d_inode->i_nlink = 2;
749 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
d0d2f2df 750 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 751 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
752 mode,
753 (__u64)current->euid,
754 (__u64)current->egid,
755 0 /* dev_t */,
737b758c
SF		 756 cifs_sb->local_nls,
757 cifs_sb->mnt_cifs_flags &
758 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 759 } else {
760 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
761 mode, (__u64)-1,
762 (__u64)-1, 0 /* dev_t */,
737b758c
SF		 763 cifs_sb->local_nls,
764 cifs_sb->mnt_cifs_flags &
765 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 766 }
767 else {
768 /* BB to be implemented via Windows secrty descriptors
769 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
770 -1, -1, local_nls); */
6473a559
SF		 771 if(direntry->d_inode) {
772 direntry->d_inode->i_mode = mode;
773 if(cifs_sb->mnt_cifs_flags &
774 CIFS_MOUNT_SET_UID) {
775 direntry->d_inode->i_uid =
776 current->fsuid;
777 direntry->d_inode->i_gid =
778 current->fsgid;
779 }
780 }
2a138ebb 781 }
1da177e4
LT		 782 }
783 kfree(full_path);
784 FreeXid(xid);
785 return rc;
786}
787
788int cifs_rmdir(struct inode *inode, struct dentry *direntry)
789{
790 int rc = 0;
791 int xid;
792 struct cifs_sb_info *cifs_sb;
793 struct cifsTconInfo *pTcon;
794 char *full_path = NULL;
795 struct cifsInodeInfo *cifsInode;
796
3020a1f5 797 cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
1da177e4
LT		 798
799 xid = GetXid();
800
801 cifs_sb = CIFS_SB(inode->i_sb);
802 pTcon = cifs_sb->tcon;
803
804 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 805 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 806 up(&inode->i_sb->s_vfs_rename_sem);
807 if (full_path == NULL) {
808 FreeXid(xid);
809 return -ENOMEM;
810 }
811
737b758c
SF		 812 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
813 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 814
815 if (!rc) {
816 inode->i_nlink--;
817 i_size_write(direntry->d_inode,0);
818 direntry->d_inode->i_nlink = 0;
819 }
820
821 cifsInode = CIFS_I(direntry->d_inode);
822 cifsInode->time = 0; /* force revalidate to go get info when
823 needed */
824 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
825 current_fs_time(inode->i_sb);
826
827 kfree(full_path);
828 FreeXid(xid);
829 return rc;
830}
831
832int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
833 struct inode *target_inode, struct dentry *target_direntry)
834{
835 char *fromName;
836 char *toName;
837 struct cifs_sb_info *cifs_sb_source;
838 struct cifs_sb_info *cifs_sb_target;
839 struct cifsTconInfo *pTcon;
840 int xid;
841 int rc = 0;
842
843 xid = GetXid();
844
845 cifs_sb_target = CIFS_SB(target_inode->i_sb);
846 cifs_sb_source = CIFS_SB(source_inode->i_sb);
847 pTcon = cifs_sb_source->tcon;
848
849 if (pTcon != cifs_sb_target->tcon) {
850 FreeXid(xid);
851 return -EXDEV; /* BB actually could be allowed if same server,
852 but different share.
853 Might eventually add support for this */
854 }
855
856 /* we already have the rename sem so we do not need to grab it again
857 here to protect the path integrity */
7f57356b
SF		 858 fromName = build_path_from_dentry(source_direntry);
859 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 860 if ((fromName == NULL) || (toName == NULL)) {
861 rc = -ENOMEM;
862 goto cifs_rename_exit;
863 }
864
865 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 866 cifs_sb_source->local_nls,
867 cifs_sb_source->mnt_cifs_flags &
868 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 869 if (rc == -EEXIST) {
870 /* check if they are the same file because rename of hardlinked
871 files is a noop */
872 FILE_UNIX_BASIC_INFO *info_buf_source;
873 FILE_UNIX_BASIC_INFO *info_buf_target;
874
875 info_buf_source =
876 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
877 if (info_buf_source != NULL) {
878 info_buf_target = info_buf_source + 1;
879 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 880 info_buf_source, cifs_sb_source->local_nls,
881 cifs_sb_source->mnt_cifs_flags &
882 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 883 if (rc == 0) {
884 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
885 info_buf_target,
737b758c
SF		 886 cifs_sb_target->local_nls,
887 /* remap based on source sb */
888 cifs_sb_source->mnt_cifs_flags &
889 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 890 }
891 if ((rc == 0) &&
892 (info_buf_source->UniqueId ==
893 info_buf_target->UniqueId)) {
894 /* do not rename since the files are hardlinked which
895 is a noop */
896 } else {
897 /* we either can not tell the files are hardlinked
898 (as with Windows servers) or files are not
899 hardlinked so delete the target manually before
900 renaming to follow POSIX rather than Windows
901 semantics */
902 cifs_unlink(target_inode, target_direntry);
903 rc = CIFSSMBRename(xid, pTcon, fromName,
904 toName,
737b758c
SF		 905 cifs_sb_source->local_nls,
906 cifs_sb_source->mnt_cifs_flags
907 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 908 }
909 kfree(info_buf_source);
910 } /* if we can not get memory just leave rc as EEXIST */
911 }
912
913 if (rc) {
914 cFYI(1, ("rename rc %d", rc));
915 }
916
917 if ((rc == -EIO) || (rc == -EEXIST)) {
918 int oplock = FALSE;
919 __u16 netfid;
920
921 /* BB FIXME Is Generic Read correct for rename? */
922 /* if renaming directory - we should not say CREATE_NOT_DIR,
923 need to test renaming open directory, also GENERIC_READ
924 might not right be right access to request */
925 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
926 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 927 cifs_sb_source->local_nls,
928 cifs_sb_source->mnt_cifs_flags &
929 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 930 if (rc==0) {
931 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 932 cifs_sb_source->local_nls,
933 cifs_sb_source->mnt_cifs_flags &
934 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 935 CIFSSMBClose(xid, pTcon, netfid);
936 }
937 }
938
939cifs_rename_exit:
940 kfree(fromName);
941 kfree(toName);
942 FreeXid(xid);
943 return rc;
944}
945
946int cifs_revalidate(struct dentry *direntry)
947{
948 int xid;
949 int rc = 0;
950 char *full_path;
951 struct cifs_sb_info *cifs_sb;
952 struct cifsInodeInfo *cifsInode;
953 loff_t local_size;
954 struct timespec local_mtime;
955 int invalidate_inode = FALSE;
956
957 if (direntry->d_inode == NULL)
958 return -ENOENT;
959
960 cifsInode = CIFS_I(direntry->d_inode);
961
962 if (cifsInode == NULL)
963 return -ENOENT;
964
965 /* no sense revalidating inode info on file that no one can write */
966 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
967 return rc;
968
969 xid = GetXid();
970
971 cifs_sb = CIFS_SB(direntry->d_sb);
972
973 /* can not safely grab the rename sem here if rename calls revalidate
974 since that would deadlock */
7f57356b 975 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 976 if (full_path == NULL) {
977 FreeXid(xid);
978 return -ENOMEM;
979 }
980 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
981 "jiffies %ld", full_path, direntry->d_inode,
982 direntry->d_inode->i_count.counter, direntry,
983 direntry->d_time, jiffies));
984
985 if (cifsInode->time == 0) {
986 /* was set to zero previously to force revalidate */
987 } else if (time_before(jiffies, cifsInode->time + HZ) &&
988 lookupCacheEnabled) {
989 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
990 (direntry->d_inode->i_nlink == 1)) {
991 kfree(full_path);
992 FreeXid(xid);
993 return rc;
994 } else {
995 cFYI(1, ("Have to revalidate file due to hardlinks"));
996 }
997 }
998
999 /* save mtime and size */
1000 local_mtime = direntry->d_inode->i_mtime;
1001 local_size = direntry->d_inode->i_size;
1002
1003 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1004 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1005 direntry->d_sb,xid);
1006 if (rc) {
1007 cFYI(1, ("error on getting revalidate info %d", rc));
1008/* if (rc != -ENOENT)
1009 rc = 0; */ /* BB should we cache info on
1010 certain errors? */
1011 }
1012 } else {
1013 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
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 }
1022 /* should we remap certain errors, access denied?, to zero */
1023
1024 /* if not oplocked, we invalidate inode pages if mtime or file size
1025 had changed on server */
1026
1027 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1028 (local_size == direntry->d_inode->i_size)) {
1029 cFYI(1, ("cifs_revalidate - inode unchanged"));
1030 } else {
1031 /* file may have changed on server */
1032 if (cifsInode->clientCanCacheRead) {
1033 /* no need to invalidate inode pages since we were the
1034 only ones who could have modified the file and the
1035 server copy is staler than ours */
1036 } else {
1037 invalidate_inode = TRUE;
1038 }
1039 }
1040
1041 /* can not grab this sem since kernel filesys locking documentation
1042 indicates i_sem may be taken by the kernel on lookup and rename
1043 which could deadlock if we grab the i_sem here as well */
1044/* down(&direntry->d_inode->i_sem);*/
1045 /* need to write out dirty pages here */
1046 if (direntry->d_inode->i_mapping) {
1047 /* do we need to lock inode until after invalidate completes
1048 below? */
1049 filemap_fdatawrite(direntry->d_inode->i_mapping);
1050 }
1051 if (invalidate_inode) {
3abb9272
SF		 1052 /* shrink_dcache not necessary now that cifs dentry ops
1053 are exported for negative dentries */
1054/* if(S_ISDIR(direntry->d_inode->i_mode))
1055 shrink_dcache_parent(direntry); */
1056 if (S_ISREG(direntry->d_inode->i_mode)) {
1057 if (direntry->d_inode->i_mapping)
1058 filemap_fdatawait(direntry->d_inode->i_mapping);
1059 /* may eventually have to do this for open files too */
1060 if (list_empty(&(cifsInode->openFileList))) {
1061 /* changed on server - flush read ahead pages */
1062 cFYI(1, ("Invalidating read ahead data on "
1063 "closed file"));
1064 invalidate_remote_inode(direntry->d_inode);
1065 }
1da177e4
LT		 1066 }
1067 }
1068/* up(&direntry->d_inode->i_sem); */
1069
1070 kfree(full_path);
1071 FreeXid(xid);
1072 return rc;
1073}
1074
1075int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1076 struct kstat *stat)
1077{
1078 int err = cifs_revalidate(dentry);
1079 if (!err)
1080 generic_fillattr(dentry->d_inode, stat);
1081 return err;
1082}
1083
1084static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1085{
1086 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1087 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1088 struct page *page;
1089 char *kaddr;
1090 int rc = 0;
1091
1092 page = grab_cache_page(mapping, index);
1093 if (!page)
1094 return -ENOMEM;
1095
1096 kaddr = kmap_atomic(page, KM_USER0);
1097 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1098 flush_dcache_page(page);
1099 kunmap_atomic(kaddr, KM_USER0);
1100 unlock_page(page);
1101 page_cache_release(page);
1102 return rc;
1103}
1104
1105int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1106{
1107 int xid;
1108 struct cifs_sb_info *cifs_sb;
1109 struct cifsTconInfo *pTcon;
1110 char *full_path = NULL;
1111 int rc = -EACCES;
1da177e4
LT		 1112 struct cifsFileInfo *open_file = NULL;
1113 FILE_BASIC_INFO time_buf;
1114 int set_time = FALSE;
1115 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1116 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1117 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1118 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1119
1120 xid = GetXid();
1121
3020a1f5 1122 cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1da177e4 1123 direntry->d_name.name, attrs->ia_valid));
6473a559 1124
1da177e4
LT		 1125 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1126 pTcon = cifs_sb->tcon;
1127
2a138ebb 1128 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
6473a559
SF		 1129 /* check if we have permission to change attrs */
1130 rc = inode_change_ok(direntry->d_inode, attrs);
1131 if(rc < 0) {
1132 FreeXid(xid);
1133 return rc;
1134 } else
1135 rc = 0;
1136 }
1137
1da177e4 1138 down(&direntry->d_sb->s_vfs_rename_sem);
7f57356b 1139 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1140 up(&direntry->d_sb->s_vfs_rename_sem);
1141 if (full_path == NULL) {
1142 FreeXid(xid);
1143 return -ENOMEM;
1144 }
1145 cifsInode = CIFS_I(direntry->d_inode);
1146
1147 /* BB check if we need to refresh inode from server now ? BB */
1148
1149 /* need to flush data before changing file size on server */
1150 filemap_fdatawrite(direntry->d_inode->i_mapping);
1151 filemap_fdatawait(direntry->d_inode->i_mapping);
1152
1153 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1154 /* To avoid spurious oplock breaks from server, in the case of
1155 inodes that we already have open, avoid doing path based
1156 setting of file size if we can do it by handle.
1157 This keeps our caching token (oplock) and avoids timeouts
1158 when the local oplock break takes longer to flush
1159 writebehind data than the SMB timeout for the SetPathInfo
1160 request would allow */
6148a742
SF		 1161 open_file = find_writable_file(cifsInode);
1162 if (open_file) {
1163 __u16 nfid = open_file->netfid;
1164 __u32 npid = open_file->pid;
1165 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1166 nfid, npid, FALSE);
23e7dd7d 1167 atomic_dec(&open_file->wrtPending);
6148a742
SF		 1168 cFYI(1,("SetFSize for attrs rc = %d", rc));
1169 if(rc == -EINVAL) {
1170 int bytes_written;
1171 rc = CIFSSMBWrite(xid, pTcon,
1172 nfid, 0, attrs->ia_size,
1173 &bytes_written, NULL, NULL,
1174 1 /* 45 seconds */);
1175 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4 1176 }
6473a559
SF		 1177 } else
1178 rc = -EINVAL;
1179
1da177e4
LT		 1180 if (rc != 0) {
1181 /* Set file size by pathname rather than by handle
1182 either because no valid, writeable file handle for
1183 it was found or because there was an error setting
1184 it by handle */
1185 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1186 attrs->ia_size, FALSE,
737b758c
SF		 1187 cifs_sb->local_nls,
1188 cifs_sb->mnt_cifs_flags &
1189 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a
SF		 1190 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1191 if(rc == -EINVAL) {
1192 __u16 netfid;
1193 int oplock = FALSE;
1194
1195 rc = SMBLegacyOpen(xid, pTcon, full_path,
1196 FILE_OPEN,
1197 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1198 CREATE_NOT_DIR, &netfid, &oplock,
1199 NULL, cifs_sb->local_nls,
1200 cifs_sb->mnt_cifs_flags &
1201 CIFS_MOUNT_MAP_SPECIAL_CHR);
1202 if (rc==0) {
1203 int bytes_written;
1204 rc = CIFSSMBWrite(xid, pTcon,
1205 netfid, 0,
1206 attrs->ia_size,
1207 &bytes_written, NULL,
1208 NULL, 1 /* 45 sec */);
1209 cFYI(1,("wrt seteof rc %d",rc));
1210 CIFSSMBClose(xid, pTcon, netfid);
1211 }
1212
1213 }
1da177e4
LT		 1214 }
1215
1216 /* Server is ok setting allocation size implicitly - no need
1217 to call:
1218 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1219 cifs_sb->local_nls);
1220 */
1221
1222 if (rc == 0) {
1223 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1224 cifs_truncate_page(direntry->d_inode->i_mapping,
1225 direntry->d_inode->i_size);
e30dcf3a
SF		 1226 } else
1227 goto cifs_setattr_exit;
1da177e4
LT		 1228 }
1229 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1230 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1231 uid = attrs->ia_uid;
1da177e4
LT		 1232 }
1233 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1234 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1235 gid = attrs->ia_gid;
1da177e4
LT		 1236 }
1237
1238 time_buf.Attributes = 0;
1239 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1240 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1241 mode = attrs->ia_mode;
1da177e4
LT		 1242 }
1243
1244 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1245 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1246 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1247 0 /* dev_t */, cifs_sb->local_nls,
1248 cifs_sb->mnt_cifs_flags &
1249 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 1250 else if (attrs->ia_valid & ATTR_MODE) {
cdbce9c8 1251 rc = 0;
1da177e4
LT		 1252 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1253 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1254 time_buf.Attributes =
1255 cpu_to_le32(cifsInode->cifsAttrs |
1256 ATTR_READONLY);
1257 } else if ((mode & S_IWUGO) == S_IWUGO) {
1258 if (cifsInode->cifsAttrs & ATTR_READONLY)
1259 time_buf.Attributes =
1260 cpu_to_le32(cifsInode->cifsAttrs &
1261 (~ATTR_READONLY));
1262 }
1263 /* BB to be implemented -
1264 via Windows security descriptors or streams */
1265 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1266 cifs_sb->local_nls); */
1267 }
1268
1269 if (attrs->ia_valid & ATTR_ATIME) {
1270 set_time = TRUE;
1271 time_buf.LastAccessTime =
1272 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1273 } else
1274 time_buf.LastAccessTime = 0;
1275
1276 if (attrs->ia_valid & ATTR_MTIME) {
1277 set_time = TRUE;
1278 time_buf.LastWriteTime =
1279 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1280 } else
1281 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1282 /* Do not set ctime explicitly unless other time
1283 stamps are changed explicitly (i.e. by utime()
1284 since we would then have a mix of client and
1285 server times */
1286
1287 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1288 set_time = TRUE;
e30dcf3a
SF		 1289 /* Although Samba throws this field away
1290 it may be useful to Windows - but we do
1291 not want to set ctime unless some other
1292 timestamp is changing */
1293 cFYI(1, ("CIFS - CTIME changed "));
1da177e4
LT		 1294 time_buf.ChangeTime =
1295 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1296 } else
1297 time_buf.ChangeTime = 0;
1298
1299 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1300 time_buf.CreationTime = 0; /* do not change */
1301 /* In the future we should experiment - try setting timestamps
1302 via Handle (SetFileInfo) instead of by path */
1303 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1304 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1305 cifs_sb->local_nls,
1306 cifs_sb->mnt_cifs_flags &
1307 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1308 else
1309 rc = -EOPNOTSUPP;
1310
1311 if (rc == -EOPNOTSUPP) {
1312 int oplock = FALSE;
1313 __u16 netfid;
1314
1315 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1316 "times not supported by this server"));
1317 /* BB we could scan to see if we already have it open
1318 and pass in pid of opener to function */
1319 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1320 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1321 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1322 NULL, cifs_sb->local_nls,
1323 cifs_sb->mnt_cifs_flags &
1324 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1325 if (rc==0) {
1326 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1327 netfid);
1328 CIFSSMBClose(xid, pTcon, netfid);
1329 } else {
1330 /* BB For even older servers we could convert time_buf
1331 into old DOS style which uses two second
1332 granularity */
1333
1334 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1335 &time_buf, cifs_sb->local_nls); */
1336 }
1337 }
e30dcf3a
SF		 1338 /* Even if error on time set, no sense failing the call if
1339 the server would set the time to a reasonable value anyway,
1340 and this check ensures that we are not being called from
1341 sys_utimes in which case we ought to fail the call back to
1342 the user when the server rejects the call */
1343 if((rc) && (attrs->ia_valid &&
1344 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1345 rc = 0;
1da177e4
LT		 1346 }
1347
1348 /* do not need local check to inode_check_ok since the server does
1349 that */
1350 if (!rc)
1351 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1352cifs_setattr_exit:
1da177e4
LT		 1353 kfree(full_path);
1354 FreeXid(xid);
1355 return rc;
1356}
1357
1358void cifs_delete_inode(struct inode *inode)
1359{
1360 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1361 /* may have to add back in if and when safe distributed caching of
1362 directories added e.g. via FindNotify */
1363}
Linux kernel - Deliverables
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