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[CIFS] Fix mknod of block and chardev over SFU mounts
[GitHub/mt8127/android_kernel_alcatel_ttab.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
713 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p ", mode, inode));
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); */
771 }
772 }
773 kfree(full_path);
774 FreeXid(xid);
775 return rc;
776}
777
778int cifs_rmdir(struct inode *inode, struct dentry *direntry)
779{
780 int rc = 0;
781 int xid;
782 struct cifs_sb_info *cifs_sb;
783 struct cifsTconInfo *pTcon;
784 char *full_path = NULL;
785 struct cifsInodeInfo *cifsInode;
786
3020a1f5 787 cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
1da177e4
LT		 788
789 xid = GetXid();
790
791 cifs_sb = CIFS_SB(inode->i_sb);
792 pTcon = cifs_sb->tcon;
793
794 down(&inode->i_sb->s_vfs_rename_sem);
7f57356b 795 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 796 up(&inode->i_sb->s_vfs_rename_sem);
797 if (full_path == NULL) {
798 FreeXid(xid);
799 return -ENOMEM;
800 }
801
737b758c
SF		 802 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
803 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 804
805 if (!rc) {
806 inode->i_nlink--;
807 i_size_write(direntry->d_inode,0);
808 direntry->d_inode->i_nlink = 0;
809 }
810
811 cifsInode = CIFS_I(direntry->d_inode);
812 cifsInode->time = 0; /* force revalidate to go get info when
813 needed */
814 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
815 current_fs_time(inode->i_sb);
816
817 kfree(full_path);
818 FreeXid(xid);
819 return rc;
820}
821
822int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
823 struct inode *target_inode, struct dentry *target_direntry)
824{
825 char *fromName;
826 char *toName;
827 struct cifs_sb_info *cifs_sb_source;
828 struct cifs_sb_info *cifs_sb_target;
829 struct cifsTconInfo *pTcon;
830 int xid;
831 int rc = 0;
832
833 xid = GetXid();
834
835 cifs_sb_target = CIFS_SB(target_inode->i_sb);
836 cifs_sb_source = CIFS_SB(source_inode->i_sb);
837 pTcon = cifs_sb_source->tcon;
838
839 if (pTcon != cifs_sb_target->tcon) {
840 FreeXid(xid);
841 return -EXDEV; /* BB actually could be allowed if same server,
842 but different share.
843 Might eventually add support for this */
844 }
845
846 /* we already have the rename sem so we do not need to grab it again
847 here to protect the path integrity */
7f57356b
SF		 848 fromName = build_path_from_dentry(source_direntry);
849 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 850 if ((fromName == NULL) || (toName == NULL)) {
851 rc = -ENOMEM;
852 goto cifs_rename_exit;
853 }
854
855 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 856 cifs_sb_source->local_nls,
857 cifs_sb_source->mnt_cifs_flags &
858 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 859 if (rc == -EEXIST) {
860 /* check if they are the same file because rename of hardlinked
861 files is a noop */
862 FILE_UNIX_BASIC_INFO *info_buf_source;
863 FILE_UNIX_BASIC_INFO *info_buf_target;
864
865 info_buf_source =
866 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
867 if (info_buf_source != NULL) {
868 info_buf_target = info_buf_source + 1;
869 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
737b758c
SF		 870 info_buf_source, cifs_sb_source->local_nls,
871 cifs_sb_source->mnt_cifs_flags &
872 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 873 if (rc == 0) {
874 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
875 info_buf_target,
737b758c
SF		 876 cifs_sb_target->local_nls,
877 /* remap based on source sb */
878 cifs_sb_source->mnt_cifs_flags &
879 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 880 }
881 if ((rc == 0) &&
882 (info_buf_source->UniqueId ==
883 info_buf_target->UniqueId)) {
884 /* do not rename since the files are hardlinked which
885 is a noop */
886 } else {
887 /* we either can not tell the files are hardlinked
888 (as with Windows servers) or files are not
889 hardlinked so delete the target manually before
890 renaming to follow POSIX rather than Windows
891 semantics */
892 cifs_unlink(target_inode, target_direntry);
893 rc = CIFSSMBRename(xid, pTcon, fromName,
894 toName,
737b758c
SF		 895 cifs_sb_source->local_nls,
896 cifs_sb_source->mnt_cifs_flags
897 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 898 }
899 kfree(info_buf_source);
900 } /* if we can not get memory just leave rc as EEXIST */
901 }
902
903 if (rc) {
904 cFYI(1, ("rename rc %d", rc));
905 }
906
907 if ((rc == -EIO) || (rc == -EEXIST)) {
908 int oplock = FALSE;
909 __u16 netfid;
910
911 /* BB FIXME Is Generic Read correct for rename? */
912 /* if renaming directory - we should not say CREATE_NOT_DIR,
913 need to test renaming open directory, also GENERIC_READ
914 might not right be right access to request */
915 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
916 CREATE_NOT_DIR, &netfid, &oplock, NULL,
737b758c
SF		 917 cifs_sb_source->local_nls,
918 cifs_sb_source->mnt_cifs_flags &
919 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 920 if (rc==0) {
921 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
737b758c
SF		 922 cifs_sb_source->local_nls,
923 cifs_sb_source->mnt_cifs_flags &
924 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 925 CIFSSMBClose(xid, pTcon, netfid);
926 }
927 }
928
929cifs_rename_exit:
930 kfree(fromName);
931 kfree(toName);
932 FreeXid(xid);
933 return rc;
934}
935
936int cifs_revalidate(struct dentry *direntry)
937{
938 int xid;
939 int rc = 0;
940 char *full_path;
941 struct cifs_sb_info *cifs_sb;
942 struct cifsInodeInfo *cifsInode;
943 loff_t local_size;
944 struct timespec local_mtime;
945 int invalidate_inode = FALSE;
946
947 if (direntry->d_inode == NULL)
948 return -ENOENT;
949
950 cifsInode = CIFS_I(direntry->d_inode);
951
952 if (cifsInode == NULL)
953 return -ENOENT;
954
955 /* no sense revalidating inode info on file that no one can write */
956 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
957 return rc;
958
959 xid = GetXid();
960
961 cifs_sb = CIFS_SB(direntry->d_sb);
962
963 /* can not safely grab the rename sem here if rename calls revalidate
964 since that would deadlock */
7f57356b 965 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 966 if (full_path == NULL) {
967 FreeXid(xid);
968 return -ENOMEM;
969 }
970 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
971 "jiffies %ld", full_path, direntry->d_inode,
972 direntry->d_inode->i_count.counter, direntry,
973 direntry->d_time, jiffies));
974
975 if (cifsInode->time == 0) {
976 /* was set to zero previously to force revalidate */
977 } else if (time_before(jiffies, cifsInode->time + HZ) &&
978 lookupCacheEnabled) {
979 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
980 (direntry->d_inode->i_nlink == 1)) {
981 kfree(full_path);
982 FreeXid(xid);
983 return rc;
984 } else {
985 cFYI(1, ("Have to revalidate file due to hardlinks"));
986 }
987 }
988
989 /* save mtime and size */
990 local_mtime = direntry->d_inode->i_mtime;
991 local_size = direntry->d_inode->i_size;
992
993 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
994 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
995 direntry->d_sb,xid);
996 if (rc) {
997 cFYI(1, ("error on getting revalidate info %d", rc));
998/* if (rc != -ENOENT)
999 rc = 0; */ /* BB should we cache info on
1000 certain errors? */
1001 }
1002 } else {
1003 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1004 direntry->d_sb,xid);
1005 if (rc) {
1006 cFYI(1, ("error on getting revalidate info %d", rc));
1007/* if (rc != -ENOENT)
1008 rc = 0; */ /* BB should we cache info on
1009 certain errors? */
1010 }
1011 }
1012 /* should we remap certain errors, access denied?, to zero */
1013
1014 /* if not oplocked, we invalidate inode pages if mtime or file size
1015 had changed on server */
1016
1017 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1018 (local_size == direntry->d_inode->i_size)) {
1019 cFYI(1, ("cifs_revalidate - inode unchanged"));
1020 } else {
1021 /* file may have changed on server */
1022 if (cifsInode->clientCanCacheRead) {
1023 /* no need to invalidate inode pages since we were the
1024 only ones who could have modified the file and the
1025 server copy is staler than ours */
1026 } else {
1027 invalidate_inode = TRUE;
1028 }
1029 }
1030
1031 /* can not grab this sem since kernel filesys locking documentation
1032 indicates i_sem may be taken by the kernel on lookup and rename
1033 which could deadlock if we grab the i_sem here as well */
1034/* down(&direntry->d_inode->i_sem);*/
1035 /* need to write out dirty pages here */
1036 if (direntry->d_inode->i_mapping) {
1037 /* do we need to lock inode until after invalidate completes
1038 below? */
1039 filemap_fdatawrite(direntry->d_inode->i_mapping);
1040 }
1041 if (invalidate_inode) {
1042 if (direntry->d_inode->i_mapping)
1043 filemap_fdatawait(direntry->d_inode->i_mapping);
1044 /* may eventually have to do this for open files too */
1045 if (list_empty(&(cifsInode->openFileList))) {
1046 /* Has changed on server - flush read ahead pages */
1047 cFYI(1, ("Invalidating read ahead data on "
1048 "closed file"));
1049 invalidate_remote_inode(direntry->d_inode);
1050 }
1051 }
1052/* up(&direntry->d_inode->i_sem); */
1053
1054 kfree(full_path);
1055 FreeXid(xid);
1056 return rc;
1057}
1058
1059int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1060 struct kstat *stat)
1061{
1062 int err = cifs_revalidate(dentry);
1063 if (!err)
1064 generic_fillattr(dentry->d_inode, stat);
1065 return err;
1066}
1067
1068static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1069{
1070 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1071 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1072 struct page *page;
1073 char *kaddr;
1074 int rc = 0;
1075
1076 page = grab_cache_page(mapping, index);
1077 if (!page)
1078 return -ENOMEM;
1079
1080 kaddr = kmap_atomic(page, KM_USER0);
1081 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1082 flush_dcache_page(page);
1083 kunmap_atomic(kaddr, KM_USER0);
1084 unlock_page(page);
1085 page_cache_release(page);
1086 return rc;
1087}
1088
1089int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1090{
1091 int xid;
1092 struct cifs_sb_info *cifs_sb;
1093 struct cifsTconInfo *pTcon;
1094 char *full_path = NULL;
1095 int rc = -EACCES;
1da177e4
LT		 1096 struct cifsFileInfo *open_file = NULL;
1097 FILE_BASIC_INFO time_buf;
1098 int set_time = FALSE;
1099 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1100 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1101 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1102 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1103
1104 xid = GetXid();
1105
3020a1f5 1106 cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1da177e4
LT		 1107 direntry->d_name.name, attrs->ia_valid));
1108 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1109 pTcon = cifs_sb->tcon;
1110
1111 down(&direntry->d_sb->s_vfs_rename_sem);
7f57356b 1112 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1113 up(&direntry->d_sb->s_vfs_rename_sem);
1114 if (full_path == NULL) {
1115 FreeXid(xid);
1116 return -ENOMEM;
1117 }
1118 cifsInode = CIFS_I(direntry->d_inode);
1119
1120 /* BB check if we need to refresh inode from server now ? BB */
1121
1122 /* need to flush data before changing file size on server */
1123 filemap_fdatawrite(direntry->d_inode->i_mapping);
1124 filemap_fdatawait(direntry->d_inode->i_mapping);
1125
1126 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1127 /* To avoid spurious oplock breaks from server, in the case of
1128 inodes that we already have open, avoid doing path based
1129 setting of file size if we can do it by handle.
1130 This keeps our caching token (oplock) and avoids timeouts
1131 when the local oplock break takes longer to flush
1132 writebehind data than the SMB timeout for the SetPathInfo
1133 request would allow */
6148a742
SF		 1134 open_file = find_writable_file(cifsInode);
1135 if (open_file) {
1136 __u16 nfid = open_file->netfid;
1137 __u32 npid = open_file->pid;
1138 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1139 nfid, npid, FALSE);
23e7dd7d 1140 atomic_dec(&open_file->wrtPending);
6148a742
SF		 1141 cFYI(1,("SetFSize for attrs rc = %d", rc));
1142 if(rc == -EINVAL) {
1143 int bytes_written;
1144 rc = CIFSSMBWrite(xid, pTcon,
1145 nfid, 0, attrs->ia_size,
1146 &bytes_written, NULL, NULL,
1147 1 /* 45 seconds */);
1148 cFYI(1,("Wrt seteof rc %d", rc));
1da177e4
LT		 1149 }
1150 }
1da177e4
LT		 1151 if (rc != 0) {
1152 /* Set file size by pathname rather than by handle
1153 either because no valid, writeable file handle for
1154 it was found or because there was an error setting
1155 it by handle */
1156 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1157 attrs->ia_size, FALSE,
737b758c
SF		 1158 cifs_sb->local_nls,
1159 cifs_sb->mnt_cifs_flags &
1160 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a
SF		 1161 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1162 if(rc == -EINVAL) {
1163 __u16 netfid;
1164 int oplock = FALSE;
1165
1166 rc = SMBLegacyOpen(xid, pTcon, full_path,
1167 FILE_OPEN,
1168 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1169 CREATE_NOT_DIR, &netfid, &oplock,
1170 NULL, cifs_sb->local_nls,
1171 cifs_sb->mnt_cifs_flags &
1172 CIFS_MOUNT_MAP_SPECIAL_CHR);
1173 if (rc==0) {
1174 int bytes_written;
1175 rc = CIFSSMBWrite(xid, pTcon,
1176 netfid, 0,
1177 attrs->ia_size,
1178 &bytes_written, NULL,
1179 NULL, 1 /* 45 sec */);
1180 cFYI(1,("wrt seteof rc %d",rc));
1181 CIFSSMBClose(xid, pTcon, netfid);
1182 }
1183
1184 }
1da177e4
LT		 1185 }
1186
1187 /* Server is ok setting allocation size implicitly - no need
1188 to call:
1189 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1190 cifs_sb->local_nls);
1191 */
1192
1193 if (rc == 0) {
1194 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1195 cifs_truncate_page(direntry->d_inode->i_mapping,
1196 direntry->d_inode->i_size);
e30dcf3a
SF		 1197 } else
1198 goto cifs_setattr_exit;
1da177e4
LT		 1199 }
1200 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1201 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1202 uid = attrs->ia_uid;
1da177e4
LT		 1203 }
1204 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1205 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1206 gid = attrs->ia_gid;
1da177e4
LT		 1207 }
1208
1209 time_buf.Attributes = 0;
1210 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1211 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1212 mode = attrs->ia_mode;
1da177e4
LT		 1213 }
1214
1215 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1216 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1217 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c
SF		 1218 0 /* dev_t */, cifs_sb->local_nls,
1219 cifs_sb->mnt_cifs_flags &
1220 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1221 else if (attrs->ia_valid & ATTR_MODE) {
1222 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1223 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1224 time_buf.Attributes =
1225 cpu_to_le32(cifsInode->cifsAttrs |
1226 ATTR_READONLY);
1227 } else if ((mode & S_IWUGO) == S_IWUGO) {
1228 if (cifsInode->cifsAttrs & ATTR_READONLY)
1229 time_buf.Attributes =
1230 cpu_to_le32(cifsInode->cifsAttrs &
1231 (~ATTR_READONLY));
1232 }
1233 /* BB to be implemented -
1234 via Windows security descriptors or streams */
1235 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1236 cifs_sb->local_nls); */
1237 }
1238
1239 if (attrs->ia_valid & ATTR_ATIME) {
1240 set_time = TRUE;
1241 time_buf.LastAccessTime =
1242 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1243 } else
1244 time_buf.LastAccessTime = 0;
1245
1246 if (attrs->ia_valid & ATTR_MTIME) {
1247 set_time = TRUE;
1248 time_buf.LastWriteTime =
1249 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1250 } else
1251 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1252 /* Do not set ctime explicitly unless other time
1253 stamps are changed explicitly (i.e. by utime()
1254 since we would then have a mix of client and
1255 server times */
1256
1257 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1258 set_time = TRUE;
e30dcf3a
SF		 1259 /* Although Samba throws this field away
1260 it may be useful to Windows - but we do
1261 not want to set ctime unless some other
1262 timestamp is changing */
1263 cFYI(1, ("CIFS - CTIME changed "));
1da177e4
LT		 1264 time_buf.ChangeTime =
1265 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1266 } else
1267 time_buf.ChangeTime = 0;
1268
1269 if (set_time || time_buf.Attributes) {
1da177e4
LT		 1270 time_buf.CreationTime = 0; /* do not change */
1271 /* In the future we should experiment - try setting timestamps
1272 via Handle (SetFileInfo) instead of by path */
1273 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1274 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1275 cifs_sb->local_nls,
1276 cifs_sb->mnt_cifs_flags &
1277 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1278 else
1279 rc = -EOPNOTSUPP;
1280
1281 if (rc == -EOPNOTSUPP) {
1282 int oplock = FALSE;
1283 __u16 netfid;
1284
1285 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1286 "times not supported by this server"));
1287 /* BB we could scan to see if we already have it open
1288 and pass in pid of opener to function */
1289 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1290 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1291 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1292 NULL, cifs_sb->local_nls,
1293 cifs_sb->mnt_cifs_flags &
1294 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1295 if (rc==0) {
1296 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1297 netfid);
1298 CIFSSMBClose(xid, pTcon, netfid);
1299 } else {
1300 /* BB For even older servers we could convert time_buf
1301 into old DOS style which uses two second
1302 granularity */
1303
1304 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1305 &time_buf, cifs_sb->local_nls); */
1306 }
1307 }
e30dcf3a
SF		 1308 /* Even if error on time set, no sense failing the call if
1309 the server would set the time to a reasonable value anyway,
1310 and this check ensures that we are not being called from
1311 sys_utimes in which case we ought to fail the call back to
1312 the user when the server rejects the call */
1313 if((rc) && (attrs->ia_valid &&
1314 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1315 rc = 0;
1da177e4
LT		 1316 }
1317
1318 /* do not need local check to inode_check_ok since the server does
1319 that */
1320 if (!rc)
1321 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1322cifs_setattr_exit:
1da177e4
LT		 1323 kfree(full_path);
1324 FreeXid(xid);
1325 return rc;
1326}
1327
1328void cifs_delete_inode(struct inode *inode)
1329{
1330 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1331 /* may have to add back in if and when safe distributed caching of
1332 directories added e.g. via FindNotify */
1333}
kernel source for telekom puls (alcatel/mediatek)