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Merge branch 'omap2-upstream' into devel
[linux-2.6-block.git] / fs / cifs / inode.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/inode.c
3 *
2dd29d31 4 * Copyright (C) International Business Machines Corp., 2002,2007
1da177e4
LT		 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
70eff55d 32
7962670e 33static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
70eff55d
CH		 34{
35 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
36
37 switch (inode->i_mode & S_IFMT) {
38 case S_IFREG:
39 inode->i_op = &cifs_file_inode_ops;
40 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
41 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
42 inode->i_fop = &cifs_file_direct_nobrl_ops;
43 else
44 inode->i_fop = &cifs_file_direct_ops;
45 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
46 inode->i_fop = &cifs_file_nobrl_ops;
47 else { /* not direct, send byte range locks */
48 inode->i_fop = &cifs_file_ops;
49 }
50
51
52 /* check if server can support readpages */
53 if (cifs_sb->tcon->ses->server->maxBuf <
54 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
55 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
56 else
57 inode->i_data.a_ops = &cifs_addr_ops;
58 break;
59 case S_IFDIR:
bc5b6e24 60#ifdef CONFIG_CIFS_DFS_UPCALL
7962670e
IM		 61 if (is_dfs_referral) {
62 inode->i_op = &cifs_dfs_referral_inode_operations;
63 } else {
bc5b6e24
SF		 64#else /* NO DFS support, treat as a directory */
65 {
66#endif
7962670e
IM		 67 inode->i_op = &cifs_dir_inode_ops;
68 inode->i_fop = &cifs_dir_ops;
69 }
70eff55d
CH		 70 break;
71 case S_IFLNK:
72 inode->i_op = &cifs_symlink_inode_ops;
73 break;
74 default:
75 init_special_inode(inode, inode->i_mode, inode->i_rdev);
76 break;
77 }
78}
79
75f12983
CH		 80static void cifs_unix_info_to_inode(struct inode *inode,
81 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
82{
83 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
84 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
85 __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
86 __u64 end_of_file = le64_to_cpu(info->EndOfFile);
87
88 inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
89 inode->i_mtime =
90 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
91 inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
92 inode->i_mode = le64_to_cpu(info->Permissions);
93
94 /*
95 * Since we set the inode type below we need to mask off
96 * to avoid strange results if bits set above.
97 */
98 inode->i_mode &= ~S_IFMT;
99 switch (le32_to_cpu(info->Type)) {
100 case UNIX_FILE:
101 inode->i_mode |= S_IFREG;
102 break;
103 case UNIX_SYMLINK:
104 inode->i_mode |= S_IFLNK;
105 break;
106 case UNIX_DIR:
107 inode->i_mode |= S_IFDIR;
108 break;
109 case UNIX_CHARDEV:
110 inode->i_mode |= S_IFCHR;
111 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
112 le64_to_cpu(info->DevMinor) & MINORMASK);
113 break;
114 case UNIX_BLOCKDEV:
115 inode->i_mode |= S_IFBLK;
116 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
117 le64_to_cpu(info->DevMinor) & MINORMASK);
118 break;
119 case UNIX_FIFO:
120 inode->i_mode |= S_IFIFO;
121 break;
122 case UNIX_SOCKET:
123 inode->i_mode |= S_IFSOCK;
124 break;
125 default:
126 /* safest to call it a file if we do not know */
127 inode->i_mode |= S_IFREG;
128 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
129 break;
130 }
131
132 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
133 !force_uid_gid)
134 inode->i_uid = cifs_sb->mnt_uid;
135 else
136 inode->i_uid = le64_to_cpu(info->Uid);
137
138 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
139 !force_uid_gid)
140 inode->i_gid = cifs_sb->mnt_gid;
141 else
142 inode->i_gid = le64_to_cpu(info->Gid);
143
144 inode->i_nlink = le64_to_cpu(info->Nlinks);
145
146 spin_lock(&inode->i_lock);
147 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
148 /*
149 * We can not safely change the file size here if the client
150 * is writing to it due to potential races.
151 */
152 i_size_write(inode, end_of_file);
153
154 /*
155 * i_blocks is not related to (i_size / i_blksize),
156 * but instead 512 byte (2**9) size is required for
157 * calculating num blocks.
158 */
159 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
160 }
161 spin_unlock(&inode->i_lock);
162}
163
7962670e
IM		 164static const unsigned char *cifs_get_search_path(struct cifsTconInfo *pTcon,
165 const char *search_path)
166{
167 int tree_len;
168 int path_len;
169 char *tmp_path;
170
171 if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS))
172 return search_path;
173
174 /* use full path name for working with DFS */
175 tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1);
176 path_len = strnlen(search_path, MAX_PATHCONF);
177
178 tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL);
179 if (tmp_path == NULL)
180 return search_path;
181
182 strncpy(tmp_path, pTcon->treeName, tree_len);
183 strncpy(tmp_path+tree_len, search_path, path_len);
184 tmp_path[tree_len+path_len] = 0;
185 return tmp_path;
186}
187
1da177e4
LT		 188int cifs_get_inode_info_unix(struct inode **pinode,
189 const unsigned char *search_path, struct super_block *sb, int xid)
190{
191 int rc = 0;
192 FILE_UNIX_BASIC_INFO findData;
193 struct cifsTconInfo *pTcon;
194 struct inode *inode;
195 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
7962670e
IM		 196 const unsigned char *full_path;
197 bool is_dfs_referral = false;
1da177e4
LT		 198
199 pTcon = cifs_sb->tcon;
26a21b98 200 cFYI(1, ("Getting info on %s", search_path));
7962670e
IM		 201
202 full_path = cifs_get_search_path(pTcon, search_path);
203
204try_again_CIFSSMBUnixQPathInfo:
1da177e4 205 /* could have done a find first instead but this returns more info */
7962670e 206 rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
737b758c
SF		 207 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
208 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 209/* dump_mem("\nUnixQPathInfo return data", &findData,
210 sizeof(findData)); */
211 if (rc) {
7962670e
IM		 212 if (rc == -EREMOTE && !is_dfs_referral) {
213 is_dfs_referral = true;
04b6e6ec
SF		 214 if (full_path != search_path) {
215 kfree(full_path);
216 full_path = search_path;
217 }
7962670e 218 goto try_again_CIFSSMBUnixQPathInfo;
1da177e4 219 }
7962670e 220 goto cgiiu_exit;
1da177e4
LT		 221 } else {
222 struct cifsInodeInfo *cifsInfo;
1da177e4
LT		 223 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
224 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
225
226 /* get new inode */
227 if (*pinode == NULL) {
228 *pinode = new_inode(sb);
7962670e
IM		 229 if (*pinode == NULL) {
230 rc = -ENOMEM;
231 goto cgiiu_exit;
232 }
1da177e4
LT		 233 /* Is an i_ino of zero legal? */
234 /* Are there sanity checks we can use to ensure that
235 the server is really filling in that field? */
d0d2f2df 236 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1da177e4
LT		 237 (*pinode)->i_ino =
238 (unsigned long)findData.UniqueId;
239 } /* note ino incremented to unique num in new_inode */
4523cc30 240 if (sb->s_flags & MS_NOATIME)
1b2b2126 241 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
50c2f753 242
1da177e4
LT		 243 insert_inode_hash(*pinode);
244 }
245
246 inode = *pinode;
247 cifsInfo = CIFS_I(inode);
248
26a21b98 249 cFYI(1, ("Old time %ld", cifsInfo->time));
1da177e4 250 cifsInfo->time = jiffies;
26a21b98 251 cFYI(1, ("New time %ld", cifsInfo->time));
1da177e4 252 /* this is ok to set on every inode revalidate */
fb8c4b14 253 atomic_set(&cifsInfo->inUse, 1);
1da177e4 254
75f12983 255 cifs_unix_info_to_inode(inode, &findData, 0);
1da177e4 256
1da177e4
LT		 257
258 if (num_of_bytes < end_of_file)
8b94bcb9 259 cFYI(1, ("allocation size less than end of file"));
5515eff8
AM		 260 cFYI(1, ("Size %ld and blocks %llu",
261 (unsigned long) inode->i_size,
262 (unsigned long long)inode->i_blocks));
70eff55d 263
7962670e 264 cifs_set_ops(inode, is_dfs_referral);
1da177e4 265 }
7962670e
IM		 266cgiiu_exit:
267 if (full_path != search_path)
268 kfree(full_path);
1da177e4
LT		 269 return rc;
270}
271
fb8c4b14 272static int decode_sfu_inode(struct inode *inode, __u64 size,
d6e2f2a4
SF		 273 const unsigned char *path,
274 struct cifs_sb_info *cifs_sb, int xid)
275{
276 int rc;
277 int oplock = FALSE;
278 __u16 netfid;
279 struct cifsTconInfo *pTcon = cifs_sb->tcon;
86c96b4b 280 char buf[24];
d6e2f2a4 281 unsigned int bytes_read;
fb8c4b14 282 char *pbuf;
d6e2f2a4
SF		 283
284 pbuf = buf;
285
4523cc30 286 if (size == 0) {
d6e2f2a4
SF		 287 inode->i_mode |= S_IFIFO;
288 return 0;
289 } else if (size < 8) {
290 return -EINVAL; /* EOPNOTSUPP? */
291 }
50c2f753 292
d6e2f2a4
SF		 293 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
294 CREATE_NOT_DIR, &netfid, &oplock, NULL,
295 cifs_sb->local_nls,
296 cifs_sb->mnt_cifs_flags &
297 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 298 if (rc == 0) {
ec637e3f 299 int buf_type = CIFS_NO_BUFFER;
d6e2f2a4
SF		 300 /* Read header */
301 rc = CIFSSMBRead(xid, pTcon,
fb8c4b14 302 netfid,
86c96b4b 303 24 /* length */, 0 /* offset */,
ec637e3f 304 &bytes_read, &pbuf, &buf_type);
4523cc30
SF		 305 if ((rc == 0) && (bytes_read >= 8)) {
306 if (memcmp("IntxBLK", pbuf, 8) == 0) {
fb8c4b14 307 cFYI(1, ("Block device"));
3020a1f5 308 inode->i_mode |= S_IFBLK;
4523cc30 309 if (bytes_read == 24) {
86c96b4b
SF		 310 /* we have enough to decode dev num */
311 __u64 mjr; /* major */
312 __u64 mnr; /* minor */
313 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
314 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
315 inode->i_rdev = MKDEV(mjr, mnr);
316 }
4523cc30 317 } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
fb8c4b14 318 cFYI(1, ("Char device"));
3020a1f5 319 inode->i_mode |= S_IFCHR;
4523cc30 320 if (bytes_read == 24) {
86c96b4b
SF		 321 /* we have enough to decode dev num */
322 __u64 mjr; /* major */
323 __u64 mnr; /* minor */
324 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
325 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
326 inode->i_rdev = MKDEV(mjr, mnr);
fb8c4b14 327 }
4523cc30 328 } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
fb8c4b14 329 cFYI(1, ("Symlink"));
3020a1f5 330 inode->i_mode |= S_IFLNK;
86c96b4b
SF		 331 } else {
332 inode->i_mode |= S_IFREG; /* file? */
fb8c4b14 333 rc = -EOPNOTSUPP;
86c96b4b 334 }
3020a1f5
SF		 335 } else {
336 inode->i_mode |= S_IFREG; /* then it is a file */
fb8c4b14
SF		 337 rc = -EOPNOTSUPP; /* or some unknown SFU type */
338 }
d6e2f2a4 339 CIFSSMBClose(xid, pTcon, netfid);
d6e2f2a4
SF		 340 }
341 return rc;
d6e2f2a4
SF		 342}
343
9e294f1c
SF		 344#define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
345
953f8681 346static int get_sfu_mode(struct inode *inode,
9e294f1c
SF		 347 const unsigned char *path,
348 struct cifs_sb_info *cifs_sb, int xid)
349{
3020a1f5 350#ifdef CONFIG_CIFS_XATTR
9e294f1c
SF		 351 ssize_t rc;
352 char ea_value[4];
353 __u32 mode;
354
355 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
356 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
fb8c4b14 357 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
4523cc30 358 if (rc < 0)
9e294f1c
SF		 359 return (int)rc;
360 else if (rc > 3) {
361 mode = le32_to_cpu(*((__le32 *)ea_value));
fb8c4b14
SF		 362 inode->i_mode &= ~SFBITS_MASK;
363 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
9e294f1c 364 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
fb8c4b14 365 cFYI(1, ("special mode bits 0%o", mode));
9e294f1c
SF		 366 return 0;
367 } else {
368 return 0;
369 }
3020a1f5
SF		 370#else
371 return -EOPNOTSUPP;
372#endif
9e294f1c
SF		 373}
374
1da177e4
LT		 375int cifs_get_inode_info(struct inode **pinode,
376 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
8b1327f6 377 struct super_block *sb, int xid, const __u16 *pfid)
1da177e4
LT		 378{
379 int rc = 0;
380 struct cifsTconInfo *pTcon;
381 struct inode *inode;
382 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
7962670e 383 const unsigned char *full_path = NULL;
1da177e4 384 char *buf = NULL;
8d6286fd 385 int adjustTZ = FALSE;
7962670e 386 bool is_dfs_referral = false;
1da177e4
LT		 387
388 pTcon = cifs_sb->tcon;
fb8c4b14 389 cFYI(1, ("Getting info on %s", search_path));
1da177e4 390
d0d2f2df
SF		 391 if ((pfindData == NULL) && (*pinode != NULL)) {
392 if (CIFS_I(*pinode)->clientCanCacheRead) {
fb8c4b14 393 cFYI(1, ("No need to revalidate cached inode sizes"));
1da177e4
LT		 394 return rc;
395 }
396 }
397
398 /* if file info not passed in then get it from server */
d0d2f2df 399 if (pfindData == NULL) {
1da177e4 400 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
d0d2f2df 401 if (buf == NULL)
1da177e4
LT		 402 return -ENOMEM;
403 pfindData = (FILE_ALL_INFO *)buf;
7962670e
IM		 404
405 full_path = cifs_get_search_path(pTcon, search_path);
406
407try_again_CIFSSMBQPathInfo:
1da177e4 408 /* could do find first instead but this returns more info */
7962670e 409 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
acf1a1b1 410 0 /* not legacy */,
6b8edfe0 411 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
737b758c 412 CIFS_MOUNT_MAP_SPECIAL_CHR);
6b8edfe0
SF		 413 /* BB optimize code so we do not make the above call
414 when server claims no NT SMB support and the above call
415 failed at least once - set flag in tcon or mount */
4523cc30 416 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
7962670e 417 rc = SMBQueryInformation(xid, pTcon, full_path,
fb8c4b14 418 pfindData, cifs_sb->local_nls,
6b8edfe0
SF		 419 cifs_sb->mnt_cifs_flags &
420 CIFS_MOUNT_MAP_SPECIAL_CHR);
8d6286fd 421 adjustTZ = TRUE;
6b8edfe0 422 }
1da177e4
LT		 423 }
424 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
425 if (rc) {
7962670e
IM		 426 if (rc == -EREMOTE && !is_dfs_referral) {
427 is_dfs_referral = true;
04b6e6ec
SF		 428 if (full_path != search_path) {
429 kfree(full_path);
430 full_path = search_path;
431 }
7962670e 432 goto try_again_CIFSSMBQPathInfo;
1da177e4 433 }
7962670e 434 goto cgii_exit;
1da177e4
LT		 435 } else {
436 struct cifsInodeInfo *cifsInfo;
437 __u32 attr = le32_to_cpu(pfindData->Attributes);
438
439 /* get new inode */
440 if (*pinode == NULL) {
441 *pinode = new_inode(sb);
acf1a1b1 442 if (*pinode == NULL) {
7962670e
IM		 443 rc = -ENOMEM;
444 goto cgii_exit;
acf1a1b1 445 }
1da177e4
LT		 446 /* Is an i_ino of zero legal? Can we use that to check
447 if the server supports returning inode numbers? Are
448 there other sanity checks we can use to ensure that
449 the server is really filling in that field? */
450
451 /* We can not use the IndexNumber field by default from
452 Windows or Samba (in ALL_INFO buf) but we can request
453 it explicitly. It may not be unique presumably if
454 the server has multiple devices mounted under one
455 share */
456
457 /* There may be higher info levels that work but are
458 there Windows server or network appliances for which
459 IndexNumber field is not guaranteed unique? */
460
fb8c4b14 461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
1da177e4
LT		 462 int rc1 = 0;
463 __u64 inode_num;
464
fb8c4b14
SF		 465 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
466 search_path, &inode_num,
737b758c
SF		 467 cifs_sb->local_nls,
468 cifs_sb->mnt_cifs_flags &
469 CIFS_MOUNT_MAP_SPECIAL_CHR);
d0d2f2df 470 if (rc1) {
fb8c4b14 471 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
1da177e4
LT		 472 /* BB EOPNOSUPP disable SERVER_INUM? */
473 } else /* do we need cast or hash to ino? */
474 (*pinode)->i_ino = inode_num;
475 } /* else ino incremented to unique num in new_inode*/
4523cc30 476 if (sb->s_flags & MS_NOATIME)
1b2b2126 477 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
1da177e4
LT		 478 insert_inode_hash(*pinode);
479 }
480 inode = *pinode;
481 cifsInfo = CIFS_I(inode);
482 cifsInfo->cifsAttrs = attr;
26a21b98 483 cFYI(1, ("Old time %ld", cifsInfo->time));
1da177e4 484 cifsInfo->time = jiffies;
26a21b98 485 cFYI(1, ("New time %ld", cifsInfo->time));
1da177e4
LT		 486
487 /* blksize needs to be multiple of two. So safer to default to
488 blksize and blkbits set in superblock so 2**blkbits and blksize
489 will match rather than setting to:
490 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
491
26a21b98 492 /* Linux can not store file creation time so ignore it */
4523cc30 493 if (pfindData->LastAccessTime)
1bd5bbcb
SF		 494 inode->i_atime = cifs_NTtimeToUnix
495 (le64_to_cpu(pfindData->LastAccessTime));
496 else /* do not need to use current_fs_time - time not stored */
497 inode->i_atime = CURRENT_TIME;
1da177e4
LT		 498 inode->i_mtime =
499 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
500 inode->i_ctime =
501 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
26a21b98 502 cFYI(0, ("Attributes came in as 0x%x", attr));
4523cc30 503 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
8d6286fd 504 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
fb8c4b14 505 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
8d6286fd 506 }
1da177e4
LT		 507
508 /* set default mode. will override for dirs below */
509 if (atomic_read(&cifsInfo->inUse) == 0)
510 /* new inode, can safely set these fields */
511 inode->i_mode = cifs_sb->mnt_file_mode;
3020a1f5 512 else /* since we set the inode type below we need to mask off
fb8c4b14
SF		 513 to avoid strange results if type changes and both
514 get orred in */
515 inode->i_mode &= ~S_IFMT;
1da177e4
LT		 516/* if (attr & ATTR_REPARSE) */
517 /* We no longer handle these as symlinks because we could not
518 follow them due to the absolute path with drive letter */
519 if (attr & ATTR_DIRECTORY) {
520 /* override default perms since we do not do byte range locking
521 on dirs */
522 inode->i_mode = cifs_sb->mnt_dir_mode;
523 inode->i_mode |= S_IFDIR;
eda3c029
SF		 524 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
525 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
526 /* No need to le64 convert size of zero */
527 (pfindData->EndOfFile == 0)) {
528 inode->i_mode = cifs_sb->mnt_file_mode;
529 inode->i_mode |= S_IFIFO;
d6e2f2a4
SF		 530/* BB Finish for SFU style symlinks and devices */
531 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
532 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
fb8c4b14 533 if (decode_sfu_inode(inode,
d6e2f2a4
SF		 534 le64_to_cpu(pfindData->EndOfFile),
535 search_path,
ad7a2926 536 cifs_sb, xid))
fb8c4b14 537 cFYI(1, ("Unrecognized sfu inode type"));
ad7a2926 538
fb8c4b14 539 cFYI(1, ("sfu mode 0%o", inode->i_mode));
1da177e4
LT		 540 } else {
541 inode->i_mode |= S_IFREG;
542 /* treat the dos attribute of read-only as read-only
543 mode e.g. 555 */
544 if (cifsInfo->cifsAttrs & ATTR_READONLY)
545 inode->i_mode &= ~(S_IWUGO);
f5c1e2ea
AT		 546 else if ((inode->i_mode & S_IWUGO) == 0)
547 /* the ATTR_READONLY flag may have been */
548 /* changed on server -- set any w bits */
549 /* allowed by mnt_file_mode */
550 inode->i_mode |= (S_IWUGO &
551 cifs_sb->mnt_file_mode);
1da177e4
LT		 552 /* BB add code here -
553 validate if device or weird share or device type? */
554 }
50c2f753 555
3677db10 556 spin_lock(&inode->i_lock);
f6d09982
SF		 557 if (is_size_safe_to_change(cifsInfo,
558 le64_to_cpu(pfindData->EndOfFile))) {
7ba52631 559 /* can not safely shrink the file size here if the
1da177e4 560 client is writing to it due to potential races */
fb8c4b14 561 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
1da177e4
LT		 562
563 /* 512 bytes (2**9) is the fake blocksize that must be
564 used for this calculation */
565 inode->i_blocks = (512 - 1 + le64_to_cpu(
566 pfindData->AllocationSize)) >> 9;
567 }
3677db10 568 spin_unlock(&inode->i_lock);
1da177e4
LT		 569
570 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
571
fb8c4b14 572 /* BB fill in uid and gid here? with help from winbind?
1da177e4 573 or retrieve from NTFS stream extended attribute */
4879b448 574#ifdef CONFIG_CIFS_EXPERIMENTAL
953f8681 575 /* fill in 0777 bits from ACL */
4879b448
SF		 576 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
577 cFYI(1, ("Getting mode bits from ACL"));
8b1327f6 578 acl_to_uid_mode(inode, search_path, pfid);
4879b448
SF		 579 }
580#endif
4523cc30 581 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
953f8681
SF		 582 /* fill in remaining high mode bits e.g. SUID, VTX */
583 get_sfu_mode(inode, search_path, cifs_sb, xid);
9e294f1c 584 } else if (atomic_read(&cifsInfo->inUse) == 0) {
1da177e4
LT		 585 inode->i_uid = cifs_sb->mnt_uid;
586 inode->i_gid = cifs_sb->mnt_gid;
587 /* set so we do not keep refreshing these fields with
588 bad data after user has changed them in memory */
fb8c4b14 589 atomic_set(&cifsInfo->inUse, 1);
1da177e4
LT		 590 }
591
7962670e 592 cifs_set_ops(inode, is_dfs_referral);
1da177e4 593 }
7962670e
IM		 594cgii_exit:
595 if (full_path != search_path)
596 kfree(full_path);
1da177e4
LT		 597 kfree(buf);
598 return rc;
599}
600
7f8ed420
SF		 601static const struct inode_operations cifs_ipc_inode_ops = {
602 .lookup = cifs_lookup,
603};
604
1da177e4 605/* gets root inode */
ce634ab2 606struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
1da177e4 607{
ce634ab2 608 int xid;
1da177e4 609 struct cifs_sb_info *cifs_sb;
ce634ab2
DH		 610 struct inode *inode;
611 long rc;
612
613 inode = iget_locked(sb, ino);
614 if (!inode)
615 return ERR_PTR(-ENOMEM);
616 if (!(inode->i_state & I_NEW))
617 return inode;
1da177e4
LT		 618
619 cifs_sb = CIFS_SB(inode->i_sb);
620 xid = GetXid();
c18c842b
SF		 621
622 if (cifs_sb->tcon->unix_ext)
7f8ed420 623 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
1da177e4 624 else
8b1327f6
SF		 625 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
626 NULL);
7f8ed420
SF		 627 if (rc && cifs_sb->tcon->ipc) {
628 cFYI(1, ("ipc connection - fake read inode"));
629 inode->i_mode |= S_IFDIR;
630 inode->i_nlink = 2;
631 inode->i_op = &cifs_ipc_inode_ops;
632 inode->i_fop = &simple_dir_operations;
633 inode->i_uid = cifs_sb->mnt_uid;
634 inode->i_gid = cifs_sb->mnt_gid;
ce634ab2
DH		 635 _FreeXid(xid);
636 iget_failed(inode);
637 return ERR_PTR(rc);
7f8ed420
SF		 638 }
639
ce634ab2
DH		 640 unlock_new_inode(inode);
641
642 /* can not call macro FreeXid here since in a void func
643 * TODO: This is no longer true
644 */
1da177e4 645 _FreeXid(xid);
ce634ab2 646 return inode;
1da177e4
LT		 647}
648
649int cifs_unlink(struct inode *inode, struct dentry *direntry)
650{
651 int rc = 0;
652 int xid;
653 struct cifs_sb_info *cifs_sb;
654 struct cifsTconInfo *pTcon;
655 char *full_path = NULL;
656 struct cifsInodeInfo *cifsInode;
657 FILE_BASIC_INFO *pinfo_buf;
658
06bcfedd 659 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
1da177e4
LT		 660
661 xid = GetXid();
662
4523cc30 663 if (inode)
6910ab30
SF		 664 cifs_sb = CIFS_SB(inode->i_sb);
665 else
06bcfedd 666 cifs_sb = CIFS_SB(direntry->d_sb);
1da177e4
LT		 667 pTcon = cifs_sb->tcon;
668
669 /* Unlink can be called from rename so we can not grab the sem here
670 since we deadlock otherwise */
a11f3a05 671/* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
7f57356b 672 full_path = build_path_from_dentry(direntry);
a11f3a05 673/* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
1da177e4
LT		 674 if (full_path == NULL) {
675 FreeXid(xid);
676 return -ENOMEM;
677 }
2d785a50
SF		 678
679 if ((pTcon->ses->capabilities & CAP_UNIX) &&
680 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
681 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
682 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
683 SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
737b758c 684 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2d785a50
SF		 685 cFYI(1, ("posix del rc %d", rc));
686 if ((rc == 0) || (rc == -ENOENT))
687 goto psx_del_no_retry;
688 }
1da177e4 689
2d785a50
SF		 690 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
691 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
692psx_del_no_retry:
1da177e4 693 if (!rc) {
d0d2f2df 694 if (direntry->d_inode)
9a53c3a7 695 drop_nlink(direntry->d_inode);
1da177e4
LT		 696 } else if (rc == -ENOENT) {
697 d_drop(direntry);
698 } else if (rc == -ETXTBSY) {
699 int oplock = FALSE;
700 __u16 netfid;
701
702 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
703 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
737b758c 704 &netfid, &oplock, NULL, cifs_sb->local_nls,
fb8c4b14 705 cifs_sb->mnt_cifs_flags &
737b758c 706 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 707 if (rc == 0) {
1da177e4 708 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
fb8c4b14
SF		 709 cifs_sb->local_nls,
710 cifs_sb->mnt_cifs_flags &
737b758c 711 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 712 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 713 if (direntry->d_inode)
9a53c3a7 714 drop_nlink(direntry->d_inode);
1da177e4
LT		 715 }
716 } else if (rc == -EACCES) {
717 /* try only if r/o attribute set in local lookup data? */
a048d7a8 718 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
1da177e4 719 if (pinfo_buf) {
1da177e4
LT		 720 /* ATTRS set to normal clears r/o bit */
721 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
722 if (!(pTcon->ses->flags & CIFS_SES_NT4))
723 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
724 pinfo_buf,
737b758c 725 cifs_sb->local_nls,
fb8c4b14 726 cifs_sb->mnt_cifs_flags &
737b758c 727 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 728 else
729 rc = -EOPNOTSUPP;
730
731 if (rc == -EOPNOTSUPP) {
732 int oplock = FALSE;
733 __u16 netfid;
734 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
735 full_path,
736 (__u16)ATTR_NORMAL,
fb8c4b14 737 cifs_sb->local_nls);
1da177e4
LT		 738 For some strange reason it seems that NT4 eats the
739 old setattr call without actually setting the
740 attributes so on to the third attempted workaround
741 */
742
743 /* BB could scan to see if we already have it open
744 and pass in pid of opener to function */
745 rc = CIFSSMBOpen(xid, pTcon, full_path,
746 FILE_OPEN, SYNCHRONIZE |
747 FILE_WRITE_ATTRIBUTES, 0,
748 &netfid, &oplock, NULL,
737b758c 749 cifs_sb->local_nls,
fb8c4b14 750 cifs_sb->mnt_cifs_flags &
737b758c 751 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 752 if (rc == 0) {
1da177e4
LT		 753 rc = CIFSSMBSetFileTimes(xid, pTcon,
754 pinfo_buf,
755 netfid);
756 CIFSSMBClose(xid, pTcon, netfid);
757 }
758 }
759 kfree(pinfo_buf);
760 }
fb8c4b14
SF		 761 if (rc == 0) {
762 rc = CIFSSMBDelFile(xid, pTcon, full_path,
763 cifs_sb->local_nls,
764 cifs_sb->mnt_cifs_flags &
737b758c 765 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 766 if (!rc) {
d0d2f2df 767 if (direntry->d_inode)
9a53c3a7 768 drop_nlink(direntry->d_inode);
1da177e4
LT		 769 } else if (rc == -ETXTBSY) {
770 int oplock = FALSE;
771 __u16 netfid;
772
773 rc = CIFSSMBOpen(xid, pTcon, full_path,
774 FILE_OPEN, DELETE,
775 CREATE_NOT_DIR |
776 CREATE_DELETE_ON_CLOSE,
777 &netfid, &oplock, NULL,
fb8c4b14
SF		 778 cifs_sb->local_nls,
779 cifs_sb->mnt_cifs_flags &
737b758c 780 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 781 if (rc == 0) {
1da177e4
LT		 782 CIFSSMBRenameOpenFile(xid, pTcon,
783 netfid, NULL,
737b758c
SF		 784 cifs_sb->local_nls,
785 cifs_sb->mnt_cifs_flags &
786 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 787 CIFSSMBClose(xid, pTcon, netfid);
d0d2f2df 788 if (direntry->d_inode)
9a53c3a7 789 drop_nlink(direntry->d_inode);
1da177e4
LT		 790 }
791 /* BB if rc = -ETXTBUSY goto the rename logic BB */
792 }
793 }
794 }
d0d2f2df 795 if (direntry->d_inode) {
b2aeb9d5
SF		 796 cifsInode = CIFS_I(direntry->d_inode);
797 cifsInode->time = 0; /* will force revalidate to get info
798 when needed */
799 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
800 }
4523cc30 801 if (inode) {
06bcfedd
SF		 802 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
803 cifsInode = CIFS_I(inode);
804 cifsInode->time = 0; /* force revalidate of dir as well */
805 }
1da177e4
LT		 806
807 kfree(full_path);
808 FreeXid(xid);
809 return rc;
810}
811
2dd29d31 812static void posix_fill_in_inode(struct inode *tmp_inode,
0b442d2c 813 FILE_UNIX_BASIC_INFO *pData, int isNewInode)
2dd29d31 814{
75f12983 815 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
2dd29d31
SF		 816 loff_t local_size;
817 struct timespec local_mtime;
818
2dd29d31
SF		 819 cifsInfo->time = jiffies;
820 atomic_inc(&cifsInfo->inUse);
821
822 /* save mtime and size */
823 local_mtime = tmp_inode->i_mtime;
824 local_size = tmp_inode->i_size;
825
75f12983 826 cifs_unix_info_to_inode(tmp_inode, pData, 1);
7962670e 827 cifs_set_ops(tmp_inode, false);
50c2f753 828
75f12983
CH		 829 if (!S_ISREG(tmp_inode->i_mode))
830 return;
2dd29d31 831
75f12983
CH		 832 /*
833 * No sense invalidating pages for new inode
834 * since we we have not started caching
835 * readahead file data yet.
836 */
837 if (isNewInode)
838 return;
2dd29d31 839
75f12983
CH		 840 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
841 (local_size == tmp_inode->i_size)) {
842 cFYI(1, ("inode exists but unchanged"));
2dd29d31 843 } else {
75f12983
CH		 844 /* file may have changed on server */
845 cFYI(1, ("invalidate inode, readdir detected change"));
846 invalidate_remote_inode(tmp_inode);
fb8c4b14 847 }
2dd29d31
SF		 848}
849
1da177e4
LT		 850int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
851{
852 int rc = 0;
853 int xid;
854 struct cifs_sb_info *cifs_sb;
855 struct cifsTconInfo *pTcon;
856 char *full_path = NULL;
857 struct inode *newinode = NULL;
858
6473a559 859 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
1da177e4
LT		 860
861 xid = GetXid();
862
863 cifs_sb = CIFS_SB(inode->i_sb);
864 pTcon = cifs_sb->tcon;
865
7f57356b 866 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 867 if (full_path == NULL) {
868 FreeXid(xid);
869 return -ENOMEM;
870 }
50c2f753 871
fb8c4b14
SF		 872 if ((pTcon->ses->capabilities & CAP_UNIX) &&
873 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
2dd29d31
SF		 874 le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
875 u32 oplock = 0;
f6d09982 876 FILE_UNIX_BASIC_INFO *pInfo =
2dd29d31 877 kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
fb8c4b14 878 if (pInfo == NULL) {
2dd29d31
SF		 879 rc = -ENOMEM;
880 goto mkdir_out;
881 }
50c2f753 882
a8cd925f 883 mode &= ~current->fs->umask;
2dd29d31
SF		 884 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
885 mode, NULL /* netfid */, pInfo, &oplock,
fb8c4b14
SF		 886 full_path, cifs_sb->local_nls,
887 cifs_sb->mnt_cifs_flags &
2dd29d31 888 CIFS_MOUNT_MAP_SPECIAL_CHR);
c45d707f
SF		 889 if (rc == -EOPNOTSUPP) {
890 kfree(pInfo);
891 goto mkdir_retry_old;
892 } else if (rc) {
2dd29d31
SF		 893 cFYI(1, ("posix mkdir returned 0x%x", rc));
894 d_drop(direntry);
895 } else {
8f2376ad
CG		 896 if (pInfo->Type == cpu_to_le32(-1)) {
897 /* no return info, go query for it */
5a07cdf8 898 kfree(pInfo);
fb8c4b14 899 goto mkdir_get_info;
5a07cdf8 900 }
fb8c4b14
SF		 901/*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
902 to set uid/gid */
2dd29d31
SF		 903 inc_nlink(inode);
904 if (pTcon->nocase)
905 direntry->d_op = &cifs_ci_dentry_ops;
906 else
907 direntry->d_op = &cifs_dentry_ops;
cbac3cba
SF		 908
909 newinode = new_inode(inode->i_sb);
5a07cdf8
SF		 910 if (newinode == NULL) {
911 kfree(pInfo);
cbac3cba 912 goto mkdir_get_info;
5a07cdf8 913 }
cbac3cba
SF		 914 /* Is an i_ino of zero legal? */
915 /* Are there sanity checks we can use to ensure that
916 the server is really filling in that field? */
917 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
918 newinode->i_ino =
919 (unsigned long)pInfo->UniqueId;
920 } /* note ino incremented to unique num in new_inode */
fb8c4b14 921 if (inode->i_sb->s_flags & MS_NOATIME)
cbac3cba
SF		 922 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
923 newinode->i_nlink = 2;
924
925 insert_inode_hash(newinode);
2dd29d31 926 d_instantiate(direntry, newinode);
cbac3cba
SF		 927
928 /* we already checked in POSIXCreate whether
929 frame was long enough */
930 posix_fill_in_inode(direntry->d_inode,
0b442d2c 931 pInfo, 1 /* NewInode */);
cbac3cba 932#ifdef CONFIG_CIFS_DEBUG2
fb8c4b14 933 cFYI(1, ("instantiated dentry %p %s to inode %p",
cbac3cba
SF		 934 direntry, direntry->d_name.name, newinode));
935
fb8c4b14
SF		 936 if (newinode->i_nlink != 2)
937 cFYI(1, ("unexpected number of links %d",
cbac3cba
SF		 938 newinode->i_nlink));
939#endif
2dd29d31
SF		 940 }
941 kfree(pInfo);
942 goto mkdir_out;
fb8c4b14 943 }
c45d707f 944mkdir_retry_old:
1da177e4 945 /* BB add setting the equivalent of mode via CreateX w/ACLs */
737b758c
SF		 946 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
947 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 948 if (rc) {
26a21b98 949 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1da177e4
LT		 950 d_drop(direntry);
951 } else {
fb8c4b14 952mkdir_get_info:
d8c76e6f 953 inc_nlink(inode);
c18c842b 954 if (pTcon->unix_ext)
1da177e4 955 rc = cifs_get_inode_info_unix(&newinode, full_path,
fb8c4b14 956 inode->i_sb, xid);
1da177e4
LT		 957 else
958 rc = cifs_get_inode_info(&newinode, full_path, NULL,
8b1327f6 959 inode->i_sb, xid, NULL);
1da177e4 960
b92327fe
SF		 961 if (pTcon->nocase)
962 direntry->d_op = &cifs_ci_dentry_ops;
963 else
964 direntry->d_op = &cifs_dentry_ops;
1da177e4 965 d_instantiate(direntry, newinode);
2dd29d31 966 /* setting nlink not necessary except in cases where we
fb8c4b14 967 * failed to get it from the server or was set bogus */
2dd29d31 968 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
fb8c4b14 969 direntry->d_inode->i_nlink = 2;
c18c842b 970 if (pTcon->unix_ext) {
3ce53fc4 971 mode &= ~current->fs->umask;
d0d2f2df 972 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1da177e4
LT		 973 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
974 mode,
83451879
SF		 975 (__u64)current->fsuid,
976 (__u64)current->fsgid,
1da177e4 977 0 /* dev_t */,
737b758c
SF		 978 cifs_sb->local_nls,
979 cifs_sb->mnt_cifs_flags &
980 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 981 } else {
982 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
983 mode, (__u64)-1,
984 (__u64)-1, 0 /* dev_t */,
737b758c 985 cifs_sb->local_nls,
fb8c4b14 986 cifs_sb->mnt_cifs_flags &
737b758c 987 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 988 }
3ce53fc4 989 } else {
1da177e4
LT		 990 /* BB to be implemented via Windows secrty descriptors
991 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
992 -1, -1, local_nls); */
fb8c4b14 993 if (direntry->d_inode) {
6473a559 994 direntry->d_inode->i_mode = mode;
25741b3e 995 direntry->d_inode->i_mode |= S_IFDIR;
fb8c4b14 996 if (cifs_sb->mnt_cifs_flags &
6473a559 997 CIFS_MOUNT_SET_UID) {
fb8c4b14 998 direntry->d_inode->i_uid =
6473a559 999 current->fsuid;
fb8c4b14 1000 direntry->d_inode->i_gid =
6473a559
SF		 1001 current->fsgid;
1002 }
1003 }
2a138ebb 1004 }
1da177e4 1005 }
fb8c4b14 1006mkdir_out:
1da177e4
LT		 1007 kfree(full_path);
1008 FreeXid(xid);
1009 return rc;
1010}
1011
1012int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1013{
1014 int rc = 0;
1015 int xid;
1016 struct cifs_sb_info *cifs_sb;
1017 struct cifsTconInfo *pTcon;
1018 char *full_path = NULL;
1019 struct cifsInodeInfo *cifsInode;
1020
26a21b98 1021 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1da177e4
LT		 1022
1023 xid = GetXid();
1024
1025 cifs_sb = CIFS_SB(inode->i_sb);
1026 pTcon = cifs_sb->tcon;
1027
7f57356b 1028 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1029 if (full_path == NULL) {
1030 FreeXid(xid);
1031 return -ENOMEM;
1032 }
1033
737b758c
SF		 1034 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1035 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1036
1037 if (!rc) {
9a53c3a7 1038 drop_nlink(inode);
3677db10 1039 spin_lock(&direntry->d_inode->i_lock);
fb8c4b14 1040 i_size_write(direntry->d_inode, 0);
ce71ec36 1041 clear_nlink(direntry->d_inode);
3677db10 1042 spin_unlock(&direntry->d_inode->i_lock);
1da177e4
LT		 1043 }
1044
1045 cifsInode = CIFS_I(direntry->d_inode);
1046 cifsInode->time = 0; /* force revalidate to go get info when
1047 needed */
1048 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1049 current_fs_time(inode->i_sb);
1050
1051 kfree(full_path);
1052 FreeXid(xid);
1053 return rc;
1054}
1055
1056int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1057 struct inode *target_inode, struct dentry *target_direntry)
1058{
1059 char *fromName;
1060 char *toName;
1061 struct cifs_sb_info *cifs_sb_source;
1062 struct cifs_sb_info *cifs_sb_target;
1063 struct cifsTconInfo *pTcon;
1064 int xid;
1065 int rc = 0;
1066
1067 xid = GetXid();
1068
1069 cifs_sb_target = CIFS_SB(target_inode->i_sb);
1070 cifs_sb_source = CIFS_SB(source_inode->i_sb);
1071 pTcon = cifs_sb_source->tcon;
1072
1073 if (pTcon != cifs_sb_target->tcon) {
1074 FreeXid(xid);
1075 return -EXDEV; /* BB actually could be allowed if same server,
1076 but different share.
1077 Might eventually add support for this */
1078 }
1079
1080 /* we already have the rename sem so we do not need to grab it again
1081 here to protect the path integrity */
7f57356b
SF		 1082 fromName = build_path_from_dentry(source_direntry);
1083 toName = build_path_from_dentry(target_direntry);
1da177e4
LT		 1084 if ((fromName == NULL) || (toName == NULL)) {
1085 rc = -ENOMEM;
1086 goto cifs_rename_exit;
1087 }
1088
1089 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
737b758c
SF		 1090 cifs_sb_source->local_nls,
1091 cifs_sb_source->mnt_cifs_flags &
1092 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1093 if (rc == -EEXIST) {
1094 /* check if they are the same file because rename of hardlinked
1095 files is a noop */
1096 FILE_UNIX_BASIC_INFO *info_buf_source;
1097 FILE_UNIX_BASIC_INFO *info_buf_target;
1098
1099 info_buf_source =
1100 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1101 if (info_buf_source != NULL) {
1102 info_buf_target = info_buf_source + 1;
c18c842b 1103 if (pTcon->unix_ext)
8e87d4dc 1104 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
fb8c4b14 1105 info_buf_source,
8e87d4dc
SF		 1106 cifs_sb_source->local_nls,
1107 cifs_sb_source->mnt_cifs_flags &
1108 CIFS_MOUNT_MAP_SPECIAL_CHR);
1109 /* else rc is still EEXIST so will fall through to
1110 unlink the target and retry rename */
1da177e4
LT		 1111 if (rc == 0) {
1112 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1113 info_buf_target,
737b758c
SF		 1114 cifs_sb_target->local_nls,
1115 /* remap based on source sb */
1116 cifs_sb_source->mnt_cifs_flags &
1117 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1118 }
1119 if ((rc == 0) &&
1120 (info_buf_source->UniqueId ==
1121 info_buf_target->UniqueId)) {
1122 /* do not rename since the files are hardlinked which
1123 is a noop */
1124 } else {
1125 /* we either can not tell the files are hardlinked
1126 (as with Windows servers) or files are not
1127 hardlinked so delete the target manually before
1128 renaming to follow POSIX rather than Windows
1129 semantics */
1130 cifs_unlink(target_inode, target_direntry);
1131 rc = CIFSSMBRename(xid, pTcon, fromName,
1132 toName,
737b758c
SF		 1133 cifs_sb_source->local_nls,
1134 cifs_sb_source->mnt_cifs_flags
1135 & CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1136 }
1137 kfree(info_buf_source);
1138 } /* if we can not get memory just leave rc as EEXIST */
1139 }
1140
ad7a2926 1141 if (rc)
1da177e4 1142 cFYI(1, ("rename rc %d", rc));
1da177e4
LT		 1143
1144 if ((rc == -EIO) || (rc == -EEXIST)) {
1145 int oplock = FALSE;
1146 __u16 netfid;
1147
1148 /* BB FIXME Is Generic Read correct for rename? */
1149 /* if renaming directory - we should not say CREATE_NOT_DIR,
1150 need to test renaming open directory, also GENERIC_READ
1151 might not right be right access to request */
1152 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1153 CREATE_NOT_DIR, &netfid, &oplock, NULL,
fb8c4b14
SF		 1154 cifs_sb_source->local_nls,
1155 cifs_sb_source->mnt_cifs_flags &
737b758c 1156 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 1157 if (rc == 0) {
8e87d4dc 1158 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
fb8c4b14 1159 cifs_sb_source->local_nls,
737b758c
SF		 1160 cifs_sb_source->mnt_cifs_flags &
1161 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1162 CIFSSMBClose(xid, pTcon, netfid);
1163 }
1164 }
1165
1166cifs_rename_exit:
1167 kfree(fromName);
1168 kfree(toName);
1169 FreeXid(xid);
1170 return rc;
1171}
1172
1173int cifs_revalidate(struct dentry *direntry)
1174{
1175 int xid;
cea21805 1176 int rc = 0, wbrc = 0;
1da177e4
LT		 1177 char *full_path;
1178 struct cifs_sb_info *cifs_sb;
1179 struct cifsInodeInfo *cifsInode;
1180 loff_t local_size;
1181 struct timespec local_mtime;
1182 int invalidate_inode = FALSE;
1183
1184 if (direntry->d_inode == NULL)
1185 return -ENOENT;
1186
1187 cifsInode = CIFS_I(direntry->d_inode);
1188
1189 if (cifsInode == NULL)
1190 return -ENOENT;
1191
1192 /* no sense revalidating inode info on file that no one can write */
1193 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1194 return rc;
1195
1196 xid = GetXid();
1197
1198 cifs_sb = CIFS_SB(direntry->d_sb);
1199
1200 /* can not safely grab the rename sem here if rename calls revalidate
1201 since that would deadlock */
7f57356b 1202 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1203 if (full_path == NULL) {
1204 FreeXid(xid);
1205 return -ENOMEM;
1206 }
1207 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1208 "jiffies %ld", full_path, direntry->d_inode,
1209 direntry->d_inode->i_count.counter, direntry,
1210 direntry->d_time, jiffies));
1211
1212 if (cifsInode->time == 0) {
1213 /* was set to zero previously to force revalidate */
1214 } else if (time_before(jiffies, cifsInode->time + HZ) &&
1215 lookupCacheEnabled) {
1216 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1217 (direntry->d_inode->i_nlink == 1)) {
1218 kfree(full_path);
1219 FreeXid(xid);
1220 return rc;
1221 } else {
1222 cFYI(1, ("Have to revalidate file due to hardlinks"));
1223 }
1224 }
1225
1226 /* save mtime and size */
1227 local_mtime = direntry->d_inode->i_mtime;
1228 local_size = direntry->d_inode->i_size;
1229
c18c842b 1230 if (cifs_sb->tcon->unix_ext) {
1da177e4 1231 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
fb8c4b14 1232 direntry->d_sb, xid);
1da177e4
LT		 1233 if (rc) {
1234 cFYI(1, ("error on getting revalidate info %d", rc));
1235/* if (rc != -ENOENT)
1236 rc = 0; */ /* BB should we cache info on
1237 certain errors? */
1238 }
1239 } else {
1240 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
8b1327f6 1241 direntry->d_sb, xid, NULL);
1da177e4
LT		 1242 if (rc) {
1243 cFYI(1, ("error on getting revalidate info %d", rc));
1244/* if (rc != -ENOENT)
1245 rc = 0; */ /* BB should we cache info on
1246 certain errors? */
1247 }
1248 }
1249 /* should we remap certain errors, access denied?, to zero */
1250
1251 /* if not oplocked, we invalidate inode pages if mtime or file size
1252 had changed on server */
1253
fb8c4b14 1254 if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1da177e4
LT		 1255 (local_size == direntry->d_inode->i_size)) {
1256 cFYI(1, ("cifs_revalidate - inode unchanged"));
1257 } else {
1258 /* file may have changed on server */
1259 if (cifsInode->clientCanCacheRead) {
1260 /* no need to invalidate inode pages since we were the
1261 only ones who could have modified the file and the
1262 server copy is staler than ours */
1263 } else {
1264 invalidate_inode = TRUE;
1265 }
1266 }
1267
1268 /* can not grab this sem since kernel filesys locking documentation
1b1dcc1b
JS		 1269 indicates i_mutex may be taken by the kernel on lookup and rename
1270 which could deadlock if we grab the i_mutex here as well */
1271/* mutex_lock(&direntry->d_inode->i_mutex);*/
1da177e4
LT		 1272 /* need to write out dirty pages here */
1273 if (direntry->d_inode->i_mapping) {
1274 /* do we need to lock inode until after invalidate completes
1275 below? */
cea21805
JL		 1276 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1277 if (wbrc)
1278 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1da177e4
LT		 1279 }
1280 if (invalidate_inode) {
3abb9272
SF		 1281 /* shrink_dcache not necessary now that cifs dentry ops
1282 are exported for negative dentries */
fb8c4b14 1283/* if (S_ISDIR(direntry->d_inode->i_mode))
3abb9272
SF		 1284 shrink_dcache_parent(direntry); */
1285 if (S_ISREG(direntry->d_inode->i_mode)) {
1286 if (direntry->d_inode->i_mapping)
cea21805
JL		 1287 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1288 if (wbrc)
1289 CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
3abb9272
SF		 1290 /* may eventually have to do this for open files too */
1291 if (list_empty(&(cifsInode->openFileList))) {
1292 /* changed on server - flush read ahead pages */
1293 cFYI(1, ("Invalidating read ahead data on "
1294 "closed file"));
1295 invalidate_remote_inode(direntry->d_inode);
1296 }
1da177e4
LT		 1297 }
1298 }
1b1dcc1b 1299/* mutex_unlock(&direntry->d_inode->i_mutex); */
50c2f753 1300
1da177e4
LT		 1301 kfree(full_path);
1302 FreeXid(xid);
1303 return rc;
1304}
1305
1306int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1307 struct kstat *stat)
1308{
1309 int err = cifs_revalidate(dentry);
5fe14c85 1310 if (!err) {
1da177e4 1311 generic_fillattr(dentry->d_inode, stat);
5fe14c85
SF		 1312 stat->blksize = CIFS_MAX_MSGSIZE;
1313 }
1da177e4
LT		 1314 return err;
1315}
1316
1317static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1318{
1319 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1320 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1321 struct page *page;
1da177e4
LT		 1322 int rc = 0;
1323
1324 page = grab_cache_page(mapping, index);
1325 if (!page)
1326 return -ENOMEM;
1327
eebd2aa3 1328 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1da177e4
LT		 1329 unlock_page(page);
1330 page_cache_release(page);
1331 return rc;
1332}
1333
fb8c4b14 1334static int cifs_vmtruncate(struct inode *inode, loff_t offset)
3677db10
SF		 1335{
1336 struct address_space *mapping = inode->i_mapping;
1337 unsigned long limit;
1338
ba6a46a0 1339 spin_lock(&inode->i_lock);
3677db10
SF		 1340 if (inode->i_size < offset)
1341 goto do_expand;
1342 /*
1343 * truncation of in-use swapfiles is disallowed - it would cause
1344 * subsequent swapout to scribble on the now-freed blocks.
1345 */
ba6a46a0
SF		 1346 if (IS_SWAPFILE(inode)) {
1347 spin_unlock(&inode->i_lock);
3677db10 1348 goto out_busy;
ba6a46a0 1349 }
3677db10
SF		 1350 i_size_write(inode, offset);
1351 spin_unlock(&inode->i_lock);
8064ab4d
SF		 1352 /*
1353 * unmap_mapping_range is called twice, first simply for efficiency
1354 * so that truncate_inode_pages does fewer single-page unmaps. However
1355 * after this first call, and before truncate_inode_pages finishes,
1356 * it is possible for private pages to be COWed, which remain after
1357 * truncate_inode_pages finishes, hence the second unmap_mapping_range
1358 * call must be made for correctness.
1359 */
3677db10
SF		 1360 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1361 truncate_inode_pages(mapping, offset);
8064ab4d 1362 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
3677db10
SF		 1363 goto out_truncate;
1364
1365do_expand:
1366 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
ba6a46a0
SF		 1367 if (limit != RLIM_INFINITY && offset > limit) {
1368 spin_unlock(&inode->i_lock);
3677db10 1369 goto out_sig;
ba6a46a0
SF		 1370 }
1371 if (offset > inode->i_sb->s_maxbytes) {
1372 spin_unlock(&inode->i_lock);
3677db10 1373 goto out_big;
ba6a46a0 1374 }
3677db10 1375 i_size_write(inode, offset);
ba6a46a0 1376 spin_unlock(&inode->i_lock);
3677db10
SF		 1377out_truncate:
1378 if (inode->i_op && inode->i_op->truncate)
1379 inode->i_op->truncate(inode);
1380 return 0;
1381out_sig:
1382 send_sig(SIGXFSZ, current, 0);
1383out_big:
1384 return -EFBIG;
1385out_busy:
1386 return -ETXTBSY;
1387}
1388
1da177e4
LT		 1389int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1390{
1391 int xid;
1392 struct cifs_sb_info *cifs_sb;
1393 struct cifsTconInfo *pTcon;
1394 char *full_path = NULL;
1395 int rc = -EACCES;
1da177e4
LT		 1396 struct cifsFileInfo *open_file = NULL;
1397 FILE_BASIC_INFO time_buf;
1398 int set_time = FALSE;
066fcb06 1399 int set_dosattr = FALSE;
1da177e4
LT		 1400 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1401 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1402 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1403 struct cifsInodeInfo *cifsInode;
1da177e4
LT		 1404
1405 xid = GetXid();
1406
3979877e 1407 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1da177e4 1408 direntry->d_name.name, attrs->ia_valid));
6473a559 1409
1da177e4
LT		 1410 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1411 pTcon = cifs_sb->tcon;
1412
2a138ebb 1413 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
6473a559
SF		 1414 /* check if we have permission to change attrs */
1415 rc = inode_change_ok(direntry->d_inode, attrs);
fb8c4b14 1416 if (rc < 0) {
6473a559
SF		 1417 FreeXid(xid);
1418 return rc;
1419 } else
1420 rc = 0;
1421 }
50c2f753 1422
7f57356b 1423 full_path = build_path_from_dentry(direntry);
1da177e4
LT		 1424 if (full_path == NULL) {
1425 FreeXid(xid);
1426 return -ENOMEM;
1427 }
1428 cifsInode = CIFS_I(direntry->d_inode);
1429
50531444 1430 if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
cea21805 1431 /*
50531444
SF		 1432 Flush data before changing file size or changing the last
1433 write time of the file on the server. If the
cea21805
JL		 1434 flush returns error, store it to report later and continue.
1435 BB: This should be smarter. Why bother flushing pages that
1436 will be truncated anyway? Also, should we error out here if
1437 the flush returns error?
1438 */
1439 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1440 if (rc != 0) {
1441 CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1442 rc = 0;
1443 }
50531444 1444 }
cea21805 1445
50531444 1446 if (attrs->ia_valid & ATTR_SIZE) {
1da177e4
LT		 1447 /* To avoid spurious oplock breaks from server, in the case of
1448 inodes that we already have open, avoid doing path based
1449 setting of file size if we can do it by handle.
1450 This keeps our caching token (oplock) and avoids timeouts
1451 when the local oplock break takes longer to flush
1452 writebehind data than the SMB timeout for the SetPathInfo
1453 request would allow */
3979877e 1454
6148a742
SF		 1455 open_file = find_writable_file(cifsInode);
1456 if (open_file) {
1457 __u16 nfid = open_file->netfid;
1458 __u32 npid = open_file->pid;
1459 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1460 nfid, npid, FALSE);
23e7dd7d 1461 atomic_dec(&open_file->wrtPending);
fb8c4b14
SF		 1462 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1463 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
77159b4d 1464 unsigned int bytes_written;
6148a742
SF		 1465 rc = CIFSSMBWrite(xid, pTcon,
1466 nfid, 0, attrs->ia_size,
1467 &bytes_written, NULL, NULL,
1468 1 /* 45 seconds */);
fb8c4b14 1469 cFYI(1, ("Wrt seteof rc %d", rc));
1da177e4 1470 }
fb8c4b14 1471 } else
6473a559
SF		 1472 rc = -EINVAL;
1473
1da177e4
LT		 1474 if (rc != 0) {
1475 /* Set file size by pathname rather than by handle
1476 either because no valid, writeable file handle for
1477 it was found or because there was an error setting
1478 it by handle */
1479 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1480 attrs->ia_size, FALSE,
fb8c4b14 1481 cifs_sb->local_nls,
737b758c
SF		 1482 cifs_sb->mnt_cifs_flags &
1483 CIFS_MOUNT_MAP_SPECIAL_CHR);
e30dcf3a 1484 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
fb8c4b14 1485 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
e30dcf3a
SF		 1486 __u16 netfid;
1487 int oplock = FALSE;
1488
1489 rc = SMBLegacyOpen(xid, pTcon, full_path,
1490 FILE_OPEN,
1491 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1492 CREATE_NOT_DIR, &netfid, &oplock,
1493 NULL, cifs_sb->local_nls,
1494 cifs_sb->mnt_cifs_flags &
1495 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 1496 if (rc == 0) {
77159b4d 1497 unsigned int bytes_written;
e30dcf3a
SF		 1498 rc = CIFSSMBWrite(xid, pTcon,
1499 netfid, 0,
1500 attrs->ia_size,
1501 &bytes_written, NULL,
1502 NULL, 1 /* 45 sec */);
fb8c4b14 1503 cFYI(1, ("wrt seteof rc %d", rc));
e30dcf3a
SF		 1504 CIFSSMBClose(xid, pTcon, netfid);
1505 }
1506
1507 }
1da177e4
LT		 1508 }
1509
1510 /* Server is ok setting allocation size implicitly - no need
1511 to call:
1512 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1513 cifs_sb->local_nls);
1514 */
1515
1516 if (rc == 0) {
3677db10 1517 rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1da177e4
LT		 1518 cifs_truncate_page(direntry->d_inode->i_mapping,
1519 direntry->d_inode->i_size);
fb8c4b14 1520 } else
e30dcf3a 1521 goto cifs_setattr_exit;
1da177e4
LT		 1522 }
1523 if (attrs->ia_valid & ATTR_UID) {
e30dcf3a 1524 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1da177e4 1525 uid = attrs->ia_uid;
1da177e4
LT		 1526 }
1527 if (attrs->ia_valid & ATTR_GID) {
e30dcf3a 1528 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1da177e4 1529 gid = attrs->ia_gid;
1da177e4
LT		 1530 }
1531
1532 time_buf.Attributes = 0;
d32c4f26
JL		 1533
1534 /* skip mode change if it's just for clearing setuid/setgid */
1535 if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1536 attrs->ia_valid &= ~ATTR_MODE;
1537
1da177e4 1538 if (attrs->ia_valid & ATTR_MODE) {
e30dcf3a 1539 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1da177e4 1540 mode = attrs->ia_mode;
1da177e4
LT		 1541 }
1542
c18c842b 1543 if ((pTcon->unix_ext)
1da177e4
LT		 1544 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1545 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
737b758c 1546 0 /* dev_t */, cifs_sb->local_nls,
fb8c4b14 1547 cifs_sb->mnt_cifs_flags &
737b758c 1548 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4 1549 else if (attrs->ia_valid & ATTR_MODE) {
cdbce9c8 1550 rc = 0;
97837582
SF		 1551#ifdef CONFIG_CIFS_EXPERIMENTAL
1552 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1553 rc = mode_to_acl(direntry->d_inode, full_path, mode);
f6d09982 1554 else if ((mode & S_IWUGO) == 0) {
97837582 1555#else
f6d09982 1556 if ((mode & S_IWUGO) == 0) {
97837582 1557#endif
f6d09982 1558 /* not writeable */
066fcb06
SF		 1559 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1560 set_dosattr = TRUE;
1da177e4
LT		 1561 time_buf.Attributes =
1562 cpu_to_le32(cifsInode->cifsAttrs |
1563 ATTR_READONLY);
066fcb06 1564 }
5268df2e
SF		 1565 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1566 /* If file is readonly on server, we would
1567 not be able to write to it - so if any write
1568 bit is enabled for user or group or other we
1569 need to at least try to remove r/o dos attr */
1570 set_dosattr = TRUE;
1571 time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1572 (~ATTR_READONLY));
1573 /* Windows ignores set to zero */
fb8c4b14 1574 if (time_buf.Attributes == 0)
5268df2e 1575 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1da177e4 1576 }
97837582
SF		 1577#ifdef CONFIG_CIFS_EXPERIMENTAL
1578 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1579 mode_to_acl(direntry->d_inode, full_path, mode);
1580#endif
1da177e4
LT		 1581 }
1582
1583 if (attrs->ia_valid & ATTR_ATIME) {
1584 set_time = TRUE;
1585 time_buf.LastAccessTime =
1586 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1587 } else
1588 time_buf.LastAccessTime = 0;
1589
1590 if (attrs->ia_valid & ATTR_MTIME) {
1591 set_time = TRUE;
1592 time_buf.LastWriteTime =
1593 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1594 } else
1595 time_buf.LastWriteTime = 0;
e30dcf3a
SF		 1596 /* Do not set ctime explicitly unless other time
1597 stamps are changed explicitly (i.e. by utime()
1598 since we would then have a mix of client and
1599 server times */
50c2f753 1600
e30dcf3a 1601 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1da177e4 1602 set_time = TRUE;
e30dcf3a
SF		 1603 /* Although Samba throws this field away
1604 it may be useful to Windows - but we do
1605 not want to set ctime unless some other
1606 timestamp is changing */
26a21b98 1607 cFYI(1, ("CIFS - CTIME changed"));
1da177e4
LT		 1608 time_buf.ChangeTime =
1609 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1610 } else
1611 time_buf.ChangeTime = 0;
1612
066fcb06 1613 if (set_time || set_dosattr) {
1da177e4
LT		 1614 time_buf.CreationTime = 0; /* do not change */
1615 /* In the future we should experiment - try setting timestamps
1616 via Handle (SetFileInfo) instead of by path */
1617 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1618 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
737b758c
SF		 1619 cifs_sb->local_nls,
1620 cifs_sb->mnt_cifs_flags &
1621 CIFS_MOUNT_MAP_SPECIAL_CHR);
1da177e4
LT		 1622 else
1623 rc = -EOPNOTSUPP;
1624
1625 if (rc == -EOPNOTSUPP) {
1626 int oplock = FALSE;
1627 __u16 netfid;
1628
1629 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1630 "times not supported by this server"));
1631 /* BB we could scan to see if we already have it open
1632 and pass in pid of opener to function */
1633 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1634 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1635 CREATE_NOT_DIR, &netfid, &oplock,
737b758c
SF		 1636 NULL, cifs_sb->local_nls,
1637 cifs_sb->mnt_cifs_flags &
1638 CIFS_MOUNT_MAP_SPECIAL_CHR);
fb8c4b14 1639 if (rc == 0) {
1da177e4
LT		 1640 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1641 netfid);
1642 CIFSSMBClose(xid, pTcon, netfid);
1643 } else {
1644 /* BB For even older servers we could convert time_buf
1645 into old DOS style which uses two second
1646 granularity */
1647
1648 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
fb8c4b14 1649 &time_buf, cifs_sb->local_nls); */
1da177e4
LT		 1650 }
1651 }
e30dcf3a
SF		 1652 /* Even if error on time set, no sense failing the call if
1653 the server would set the time to a reasonable value anyway,
1654 and this check ensures that we are not being called from
1655 sys_utimes in which case we ought to fail the call back to
1656 the user when the server rejects the call */
fb8c4b14 1657 if ((rc) && (attrs->ia_valid &
e30dcf3a
SF		 1658 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1659 rc = 0;
1da177e4
LT		 1660 }
1661
1662 /* do not need local check to inode_check_ok since the server does
1663 that */
1664 if (!rc)
1665 rc = inode_setattr(direntry->d_inode, attrs);
e30dcf3a 1666cifs_setattr_exit:
1da177e4
LT		 1667 kfree(full_path);
1668 FreeXid(xid);
1669 return rc;
1670}
1671
99ee4dbd 1672#if 0
1da177e4
LT		 1673void cifs_delete_inode(struct inode *inode)
1674{
26a21b98 1675 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1da177e4
LT		 1676 /* may have to add back in if and when safe distributed caching of
1677 directories added e.g. via FindNotify */
1678}
99ee4dbd 1679#endif
Linux 6.x block layer and io_uring tree(s)