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1 | /* |
2 | * fs/cifs/inode.c |
3 | * |
4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * |
7 | * This library is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU Lesser General Public License as published |
9 | * by the Free Software Foundation; either version 2.1 of the License, or |
10 | * (at your option) any later version. |
11 | * |
12 | * This library is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
15 | * the GNU Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public License |
18 | * along with this library; if not, write to the Free Software |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
20 | */ |
21 | #include <linux/fs.h> |
22 | #include <linux/stat.h> |
23 | #include <linux/slab.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 | #include "fscache.h" |
33 | |
34 | |
35 | static void cifs_set_ops(struct inode *inode) |
36 | { |
37 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
38 | |
39 | switch (inode->i_mode & S_IFMT) { |
40 | case S_IFREG: |
41 | inode->i_op = &cifs_file_inode_ops; |
42 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
43 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
44 | inode->i_fop = &cifs_file_direct_nobrl_ops; |
45 | else |
46 | inode->i_fop = &cifs_file_direct_ops; |
47 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
48 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
49 | inode->i_fop = &cifs_file_strict_nobrl_ops; |
50 | else |
51 | inode->i_fop = &cifs_file_strict_ops; |
52 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
53 | inode->i_fop = &cifs_file_nobrl_ops; |
54 | else { /* not direct, send byte range locks */ |
55 | inode->i_fop = &cifs_file_ops; |
56 | } |
57 | |
58 | /* check if server can support readpages */ |
59 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf < |
60 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) |
61 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
62 | else |
63 | inode->i_data.a_ops = &cifs_addr_ops; |
64 | break; |
65 | case S_IFDIR: |
66 | #ifdef CONFIG_CIFS_DFS_UPCALL |
67 | if (IS_AUTOMOUNT(inode)) { |
68 | inode->i_op = &cifs_dfs_referral_inode_operations; |
69 | } else { |
70 | #else /* NO DFS support, treat as a directory */ |
71 | { |
72 | #endif |
73 | inode->i_op = &cifs_dir_inode_ops; |
74 | inode->i_fop = &cifs_dir_ops; |
75 | } |
76 | break; |
77 | case S_IFLNK: |
78 | inode->i_op = &cifs_symlink_inode_ops; |
79 | break; |
80 | default: |
81 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
82 | break; |
83 | } |
84 | } |
85 | |
86 | /* check inode attributes against fattr. If they don't match, tag the |
87 | * inode for cache invalidation |
88 | */ |
89 | static void |
90 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) |
91 | { |
92 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
93 | |
94 | cFYI(1, "%s: revalidating inode %llu", __func__, cifs_i->uniqueid); |
95 | |
96 | if (inode->i_state & I_NEW) { |
97 | cFYI(1, "%s: inode %llu is new", __func__, cifs_i->uniqueid); |
98 | return; |
99 | } |
100 | |
101 | /* don't bother with revalidation if we have an oplock */ |
102 | if (cifs_i->clientCanCacheRead) { |
103 | cFYI(1, "%s: inode %llu is oplocked", __func__, |
104 | cifs_i->uniqueid); |
105 | return; |
106 | } |
107 | |
108 | /* revalidate if mtime or size have changed */ |
109 | if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) && |
110 | cifs_i->server_eof == fattr->cf_eof) { |
111 | cFYI(1, "%s: inode %llu is unchanged", __func__, |
112 | cifs_i->uniqueid); |
113 | return; |
114 | } |
115 | |
116 | cFYI(1, "%s: invalidating inode %llu mapping", __func__, |
117 | cifs_i->uniqueid); |
118 | cifs_i->invalid_mapping = true; |
119 | } |
120 | |
121 | /* populate an inode with info from a cifs_fattr struct */ |
122 | void |
123 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) |
124 | { |
125 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
126 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
127 | unsigned long oldtime = cifs_i->time; |
128 | |
129 | cifs_revalidate_cache(inode, fattr); |
130 | |
131 | inode->i_atime = fattr->cf_atime; |
132 | inode->i_mtime = fattr->cf_mtime; |
133 | inode->i_ctime = fattr->cf_ctime; |
134 | inode->i_rdev = fattr->cf_rdev; |
135 | inode->i_nlink = fattr->cf_nlink; |
136 | inode->i_uid = fattr->cf_uid; |
137 | inode->i_gid = fattr->cf_gid; |
138 | |
139 | /* if dynperm is set, don't clobber existing mode */ |
140 | if (inode->i_state & I_NEW || |
141 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) |
142 | inode->i_mode = fattr->cf_mode; |
143 | |
144 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
145 | |
146 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
147 | cifs_i->time = 0; |
148 | else |
149 | cifs_i->time = jiffies; |
150 | |
151 | cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode, |
152 | oldtime, cifs_i->time); |
153 | |
154 | cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; |
155 | |
156 | cifs_i->server_eof = fattr->cf_eof; |
157 | /* |
158 | * Can't safely change the file size here if the client is writing to |
159 | * it due to potential races. |
160 | */ |
161 | spin_lock(&inode->i_lock); |
162 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
163 | i_size_write(inode, fattr->cf_eof); |
164 | |
165 | /* |
166 | * i_blocks is not related to (i_size / i_blksize), |
167 | * but instead 512 byte (2**9) size is required for |
168 | * calculating num blocks. |
169 | */ |
170 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; |
171 | } |
172 | spin_unlock(&inode->i_lock); |
173 | |
174 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
175 | inode->i_flags |= S_AUTOMOUNT; |
176 | cifs_set_ops(inode); |
177 | } |
178 | |
179 | void |
180 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) |
181 | { |
182 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
183 | |
184 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
185 | return; |
186 | |
187 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
188 | } |
189 | |
190 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
191 | void |
192 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, |
193 | struct cifs_sb_info *cifs_sb) |
194 | { |
195 | memset(fattr, 0, sizeof(*fattr)); |
196 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); |
197 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); |
198 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
199 | |
200 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
201 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); |
202 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); |
203 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
204 | |
205 | /* |
206 | * Since we set the inode type below we need to mask off |
207 | * to avoid strange results if bits set above. |
208 | */ |
209 | fattr->cf_mode &= ~S_IFMT; |
210 | switch (le32_to_cpu(info->Type)) { |
211 | case UNIX_FILE: |
212 | fattr->cf_mode |= S_IFREG; |
213 | fattr->cf_dtype = DT_REG; |
214 | break; |
215 | case UNIX_SYMLINK: |
216 | fattr->cf_mode |= S_IFLNK; |
217 | fattr->cf_dtype = DT_LNK; |
218 | break; |
219 | case UNIX_DIR: |
220 | fattr->cf_mode |= S_IFDIR; |
221 | fattr->cf_dtype = DT_DIR; |
222 | break; |
223 | case UNIX_CHARDEV: |
224 | fattr->cf_mode |= S_IFCHR; |
225 | fattr->cf_dtype = DT_CHR; |
226 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
227 | le64_to_cpu(info->DevMinor) & MINORMASK); |
228 | break; |
229 | case UNIX_BLOCKDEV: |
230 | fattr->cf_mode |= S_IFBLK; |
231 | fattr->cf_dtype = DT_BLK; |
232 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), |
233 | le64_to_cpu(info->DevMinor) & MINORMASK); |
234 | break; |
235 | case UNIX_FIFO: |
236 | fattr->cf_mode |= S_IFIFO; |
237 | fattr->cf_dtype = DT_FIFO; |
238 | break; |
239 | case UNIX_SOCKET: |
240 | fattr->cf_mode |= S_IFSOCK; |
241 | fattr->cf_dtype = DT_SOCK; |
242 | break; |
243 | default: |
244 | /* safest to call it a file if we do not know */ |
245 | fattr->cf_mode |= S_IFREG; |
246 | fattr->cf_dtype = DT_REG; |
247 | cFYI(1, "unknown type %d", le32_to_cpu(info->Type)); |
248 | break; |
249 | } |
250 | |
251 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
252 | fattr->cf_uid = cifs_sb->mnt_uid; |
253 | else |
254 | fattr->cf_uid = le64_to_cpu(info->Uid); |
255 | |
256 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
257 | fattr->cf_gid = cifs_sb->mnt_gid; |
258 | else |
259 | fattr->cf_gid = le64_to_cpu(info->Gid); |
260 | |
261 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
262 | } |
263 | |
264 | /* |
265 | * Fill a cifs_fattr struct with fake inode info. |
266 | * |
267 | * Needed to setup cifs_fattr data for the directory which is the |
268 | * junction to the new submount (ie to setup the fake directory |
269 | * which represents a DFS referral). |
270 | */ |
271 | static void |
272 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
273 | { |
274 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
275 | |
276 | cFYI(1, "creating fake fattr for DFS referral"); |
277 | |
278 | memset(fattr, 0, sizeof(*fattr)); |
279 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; |
280 | fattr->cf_uid = cifs_sb->mnt_uid; |
281 | fattr->cf_gid = cifs_sb->mnt_gid; |
282 | fattr->cf_atime = CURRENT_TIME; |
283 | fattr->cf_ctime = CURRENT_TIME; |
284 | fattr->cf_mtime = CURRENT_TIME; |
285 | fattr->cf_nlink = 2; |
286 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; |
287 | } |
288 | |
289 | int cifs_get_file_info_unix(struct file *filp) |
290 | { |
291 | int rc; |
292 | int xid; |
293 | FILE_UNIX_BASIC_INFO find_data; |
294 | struct cifs_fattr fattr; |
295 | struct inode *inode = filp->f_path.dentry->d_inode; |
296 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
297 | struct cifsFileInfo *cfile = filp->private_data; |
298 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
299 | |
300 | xid = GetXid(); |
301 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data); |
302 | if (!rc) { |
303 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
304 | } else if (rc == -EREMOTE) { |
305 | cifs_create_dfs_fattr(&fattr, inode->i_sb); |
306 | rc = 0; |
307 | } |
308 | |
309 | cifs_fattr_to_inode(inode, &fattr); |
310 | FreeXid(xid); |
311 | return rc; |
312 | } |
313 | |
314 | int cifs_get_inode_info_unix(struct inode **pinode, |
315 | const unsigned char *full_path, |
316 | struct super_block *sb, int xid) |
317 | { |
318 | int rc; |
319 | FILE_UNIX_BASIC_INFO find_data; |
320 | struct cifs_fattr fattr; |
321 | struct cifs_tcon *tcon; |
322 | struct tcon_link *tlink; |
323 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
324 | |
325 | cFYI(1, "Getting info on %s", full_path); |
326 | |
327 | tlink = cifs_sb_tlink(cifs_sb); |
328 | if (IS_ERR(tlink)) |
329 | return PTR_ERR(tlink); |
330 | tcon = tlink_tcon(tlink); |
331 | |
332 | /* could have done a find first instead but this returns more info */ |
333 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
334 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
335 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
336 | cifs_put_tlink(tlink); |
337 | |
338 | if (!rc) { |
339 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); |
340 | } else if (rc == -EREMOTE) { |
341 | cifs_create_dfs_fattr(&fattr, sb); |
342 | rc = 0; |
343 | } else { |
344 | return rc; |
345 | } |
346 | |
347 | /* check for Minshall+French symlinks */ |
348 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
349 | int tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); |
350 | if (tmprc) |
351 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); |
352 | } |
353 | |
354 | if (*pinode == NULL) { |
355 | /* get new inode */ |
356 | cifs_fill_uniqueid(sb, &fattr); |
357 | *pinode = cifs_iget(sb, &fattr); |
358 | if (!*pinode) |
359 | rc = -ENOMEM; |
360 | } else { |
361 | /* we already have inode, update it */ |
362 | cifs_fattr_to_inode(*pinode, &fattr); |
363 | } |
364 | |
365 | return rc; |
366 | } |
367 | |
368 | static int |
369 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, |
370 | struct cifs_sb_info *cifs_sb, int xid) |
371 | { |
372 | int rc; |
373 | int oplock = 0; |
374 | __u16 netfid; |
375 | struct tcon_link *tlink; |
376 | struct cifs_tcon *tcon; |
377 | struct cifs_io_parms io_parms; |
378 | char buf[24]; |
379 | unsigned int bytes_read; |
380 | char *pbuf; |
381 | |
382 | pbuf = buf; |
383 | |
384 | fattr->cf_mode &= ~S_IFMT; |
385 | |
386 | if (fattr->cf_eof == 0) { |
387 | fattr->cf_mode |= S_IFIFO; |
388 | fattr->cf_dtype = DT_FIFO; |
389 | return 0; |
390 | } else if (fattr->cf_eof < 8) { |
391 | fattr->cf_mode |= S_IFREG; |
392 | fattr->cf_dtype = DT_REG; |
393 | return -EINVAL; /* EOPNOTSUPP? */ |
394 | } |
395 | |
396 | tlink = cifs_sb_tlink(cifs_sb); |
397 | if (IS_ERR(tlink)) |
398 | return PTR_ERR(tlink); |
399 | tcon = tlink_tcon(tlink); |
400 | |
401 | rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ, |
402 | CREATE_NOT_DIR, &netfid, &oplock, NULL, |
403 | cifs_sb->local_nls, |
404 | cifs_sb->mnt_cifs_flags & |
405 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
406 | if (rc == 0) { |
407 | int buf_type = CIFS_NO_BUFFER; |
408 | /* Read header */ |
409 | io_parms.netfid = netfid; |
410 | io_parms.pid = current->tgid; |
411 | io_parms.tcon = tcon; |
412 | io_parms.offset = 0; |
413 | io_parms.length = 24; |
414 | rc = CIFSSMBRead(xid, &io_parms, &bytes_read, &pbuf, |
415 | &buf_type); |
416 | if ((rc == 0) && (bytes_read >= 8)) { |
417 | if (memcmp("IntxBLK", pbuf, 8) == 0) { |
418 | cFYI(1, "Block device"); |
419 | fattr->cf_mode |= S_IFBLK; |
420 | fattr->cf_dtype = DT_BLK; |
421 | if (bytes_read == 24) { |
422 | /* we have enough to decode dev num */ |
423 | __u64 mjr; /* major */ |
424 | __u64 mnr; /* minor */ |
425 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
426 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
427 | fattr->cf_rdev = MKDEV(mjr, mnr); |
428 | } |
429 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
430 | cFYI(1, "Char device"); |
431 | fattr->cf_mode |= S_IFCHR; |
432 | fattr->cf_dtype = DT_CHR; |
433 | if (bytes_read == 24) { |
434 | /* we have enough to decode dev num */ |
435 | __u64 mjr; /* major */ |
436 | __u64 mnr; /* minor */ |
437 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); |
438 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); |
439 | fattr->cf_rdev = MKDEV(mjr, mnr); |
440 | } |
441 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
442 | cFYI(1, "Symlink"); |
443 | fattr->cf_mode |= S_IFLNK; |
444 | fattr->cf_dtype = DT_LNK; |
445 | } else { |
446 | fattr->cf_mode |= S_IFREG; /* file? */ |
447 | fattr->cf_dtype = DT_REG; |
448 | rc = -EOPNOTSUPP; |
449 | } |
450 | } else { |
451 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
452 | fattr->cf_dtype = DT_REG; |
453 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
454 | } |
455 | CIFSSMBClose(xid, tcon, netfid); |
456 | } |
457 | cifs_put_tlink(tlink); |
458 | return rc; |
459 | } |
460 | |
461 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
462 | |
463 | /* |
464 | * Fetch mode bits as provided by SFU. |
465 | * |
466 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? |
467 | */ |
468 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, |
469 | struct cifs_sb_info *cifs_sb, int xid) |
470 | { |
471 | #ifdef CONFIG_CIFS_XATTR |
472 | ssize_t rc; |
473 | char ea_value[4]; |
474 | __u32 mode; |
475 | struct tcon_link *tlink; |
476 | struct cifs_tcon *tcon; |
477 | |
478 | tlink = cifs_sb_tlink(cifs_sb); |
479 | if (IS_ERR(tlink)) |
480 | return PTR_ERR(tlink); |
481 | tcon = tlink_tcon(tlink); |
482 | |
483 | rc = CIFSSMBQAllEAs(xid, tcon, path, "SETFILEBITS", |
484 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
485 | cifs_sb->mnt_cifs_flags & |
486 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
487 | cifs_put_tlink(tlink); |
488 | if (rc < 0) |
489 | return (int)rc; |
490 | else if (rc > 3) { |
491 | mode = le32_to_cpu(*((__le32 *)ea_value)); |
492 | fattr->cf_mode &= ~SFBITS_MASK; |
493 | cFYI(1, "special bits 0%o org mode 0%o", mode, |
494 | fattr->cf_mode); |
495 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
496 | cFYI(1, "special mode bits 0%o", mode); |
497 | } |
498 | |
499 | return 0; |
500 | #else |
501 | return -EOPNOTSUPP; |
502 | #endif |
503 | } |
504 | |
505 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
506 | static void |
507 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
508 | struct cifs_sb_info *cifs_sb, bool adjust_tz) |
509 | { |
510 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
511 | |
512 | memset(fattr, 0, sizeof(*fattr)); |
513 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); |
514 | if (info->DeletePending) |
515 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; |
516 | |
517 | if (info->LastAccessTime) |
518 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); |
519 | else |
520 | fattr->cf_atime = CURRENT_TIME; |
521 | |
522 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); |
523 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); |
524 | |
525 | if (adjust_tz) { |
526 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
527 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; |
528 | } |
529 | |
530 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); |
531 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); |
532 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
533 | |
534 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { |
535 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
536 | fattr->cf_dtype = DT_DIR; |
537 | } else { |
538 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; |
539 | fattr->cf_dtype = DT_REG; |
540 | |
541 | /* clear write bits if ATTR_READONLY is set */ |
542 | if (fattr->cf_cifsattrs & ATTR_READONLY) |
543 | fattr->cf_mode &= ~(S_IWUGO); |
544 | } |
545 | |
546 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
547 | |
548 | fattr->cf_uid = cifs_sb->mnt_uid; |
549 | fattr->cf_gid = cifs_sb->mnt_gid; |
550 | } |
551 | |
552 | int cifs_get_file_info(struct file *filp) |
553 | { |
554 | int rc; |
555 | int xid; |
556 | FILE_ALL_INFO find_data; |
557 | struct cifs_fattr fattr; |
558 | struct inode *inode = filp->f_path.dentry->d_inode; |
559 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
560 | struct cifsFileInfo *cfile = filp->private_data; |
561 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
562 | |
563 | xid = GetXid(); |
564 | rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); |
565 | if (rc == -EOPNOTSUPP || rc == -EINVAL) { |
566 | /* |
567 | * FIXME: legacy server -- fall back to path-based call? |
568 | * for now, just skip revalidating and mark inode for |
569 | * immediate reval. |
570 | */ |
571 | rc = 0; |
572 | CIFS_I(inode)->time = 0; |
573 | goto cgfi_exit; |
574 | } else if (rc == -EREMOTE) { |
575 | cifs_create_dfs_fattr(&fattr, inode->i_sb); |
576 | rc = 0; |
577 | } else if (rc) |
578 | goto cgfi_exit; |
579 | |
580 | /* |
581 | * don't bother with SFU junk here -- just mark inode as needing |
582 | * revalidation. |
583 | */ |
584 | cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); |
585 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
586 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; |
587 | cifs_fattr_to_inode(inode, &fattr); |
588 | cgfi_exit: |
589 | FreeXid(xid); |
590 | return rc; |
591 | } |
592 | |
593 | int cifs_get_inode_info(struct inode **pinode, |
594 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
595 | struct super_block *sb, int xid, const __u16 *pfid) |
596 | { |
597 | int rc = 0, tmprc; |
598 | struct cifs_tcon *pTcon; |
599 | struct tcon_link *tlink; |
600 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
601 | char *buf = NULL; |
602 | bool adjustTZ = false; |
603 | struct cifs_fattr fattr; |
604 | |
605 | tlink = cifs_sb_tlink(cifs_sb); |
606 | if (IS_ERR(tlink)) |
607 | return PTR_ERR(tlink); |
608 | pTcon = tlink_tcon(tlink); |
609 | |
610 | cFYI(1, "Getting info on %s", full_path); |
611 | |
612 | if ((pfindData == NULL) && (*pinode != NULL)) { |
613 | if (CIFS_I(*pinode)->clientCanCacheRead) { |
614 | cFYI(1, "No need to revalidate cached inode sizes"); |
615 | goto cgii_exit; |
616 | } |
617 | } |
618 | |
619 | /* if file info not passed in then get it from server */ |
620 | if (pfindData == NULL) { |
621 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
622 | if (buf == NULL) { |
623 | rc = -ENOMEM; |
624 | goto cgii_exit; |
625 | } |
626 | pfindData = (FILE_ALL_INFO *)buf; |
627 | |
628 | /* could do find first instead but this returns more info */ |
629 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
630 | 0 /* not legacy */, |
631 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
632 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
633 | /* BB optimize code so we do not make the above call |
634 | when server claims no NT SMB support and the above call |
635 | failed at least once - set flag in tcon or mount */ |
636 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
637 | rc = SMBQueryInformation(xid, pTcon, full_path, |
638 | pfindData, cifs_sb->local_nls, |
639 | cifs_sb->mnt_cifs_flags & |
640 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
641 | adjustTZ = true; |
642 | } |
643 | } |
644 | |
645 | if (!rc) { |
646 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, |
647 | cifs_sb, adjustTZ); |
648 | } else if (rc == -EREMOTE) { |
649 | cifs_create_dfs_fattr(&fattr, sb); |
650 | rc = 0; |
651 | } else { |
652 | goto cgii_exit; |
653 | } |
654 | |
655 | /* |
656 | * If an inode wasn't passed in, then get the inode number |
657 | * |
658 | * Is an i_ino of zero legal? Can we use that to check if the server |
659 | * supports returning inode numbers? Are there other sanity checks we |
660 | * can use to ensure that the server is really filling in that field? |
661 | * |
662 | * We can not use the IndexNumber field by default from Windows or |
663 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA |
664 | * CIFS spec claims that this value is unique within the scope of a |
665 | * share, and the windows docs hint that it's actually unique |
666 | * per-machine. |
667 | * |
668 | * There may be higher info levels that work but are there Windows |
669 | * server or network appliances for which IndexNumber field is not |
670 | * guaranteed unique? |
671 | */ |
672 | if (*pinode == NULL) { |
673 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
674 | int rc1 = 0; |
675 | |
676 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, |
677 | full_path, &fattr.cf_uniqueid, |
678 | cifs_sb->local_nls, |
679 | cifs_sb->mnt_cifs_flags & |
680 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
681 | if (rc1 || !fattr.cf_uniqueid) { |
682 | cFYI(1, "GetSrvInodeNum rc %d", rc1); |
683 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
684 | cifs_autodisable_serverino(cifs_sb); |
685 | } |
686 | } else { |
687 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
688 | } |
689 | } else { |
690 | fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
691 | } |
692 | |
693 | /* query for SFU type info if supported and needed */ |
694 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && |
695 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
696 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); |
697 | if (tmprc) |
698 | cFYI(1, "cifs_sfu_type failed: %d", tmprc); |
699 | } |
700 | |
701 | #ifdef CONFIG_CIFS_ACL |
702 | /* fill in 0777 bits from ACL */ |
703 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
704 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, |
705 | pfid); |
706 | if (rc) { |
707 | cFYI(1, "%s: Getting ACL failed with error: %d", |
708 | __func__, rc); |
709 | goto cgii_exit; |
710 | } |
711 | } |
712 | #endif /* CONFIG_CIFS_ACL */ |
713 | |
714 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
715 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
716 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); |
717 | |
718 | /* check for Minshall+French symlinks */ |
719 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { |
720 | tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); |
721 | if (tmprc) |
722 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); |
723 | } |
724 | |
725 | if (!*pinode) { |
726 | *pinode = cifs_iget(sb, &fattr); |
727 | if (!*pinode) |
728 | rc = -ENOMEM; |
729 | } else { |
730 | cifs_fattr_to_inode(*pinode, &fattr); |
731 | } |
732 | |
733 | cgii_exit: |
734 | kfree(buf); |
735 | cifs_put_tlink(tlink); |
736 | return rc; |
737 | } |
738 | |
739 | static const struct inode_operations cifs_ipc_inode_ops = { |
740 | .lookup = cifs_lookup, |
741 | }; |
742 | |
743 | char *cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb, |
744 | struct cifs_tcon *tcon) |
745 | { |
746 | int pplen = vol->prepath ? strlen(vol->prepath) : 0; |
747 | int dfsplen; |
748 | char *full_path = NULL; |
749 | |
750 | /* if no prefix path, simply set path to the root of share to "" */ |
751 | if (pplen == 0) { |
752 | full_path = kmalloc(1, GFP_KERNEL); |
753 | if (full_path) |
754 | full_path[0] = 0; |
755 | return full_path; |
756 | } |
757 | |
758 | if (tcon->Flags & SMB_SHARE_IS_IN_DFS) |
759 | dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1); |
760 | else |
761 | dfsplen = 0; |
762 | |
763 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); |
764 | if (full_path == NULL) |
765 | return full_path; |
766 | |
767 | if (dfsplen) { |
768 | strncpy(full_path, tcon->treeName, dfsplen); |
769 | /* switch slash direction in prepath depending on whether |
770 | * windows or posix style path names |
771 | */ |
772 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { |
773 | int i; |
774 | for (i = 0; i < dfsplen; i++) { |
775 | if (full_path[i] == '\\') |
776 | full_path[i] = '/'; |
777 | } |
778 | } |
779 | } |
780 | strncpy(full_path + dfsplen, vol->prepath, pplen); |
781 | full_path[dfsplen + pplen] = 0; /* add trailing null */ |
782 | return full_path; |
783 | } |
784 | |
785 | static int |
786 | cifs_find_inode(struct inode *inode, void *opaque) |
787 | { |
788 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
789 | |
790 | /* don't match inode with different uniqueid */ |
791 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
792 | return 0; |
793 | |
794 | /* use createtime like an i_generation field */ |
795 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) |
796 | return 0; |
797 | |
798 | /* don't match inode of different type */ |
799 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) |
800 | return 0; |
801 | |
802 | /* if it's not a directory or has no dentries, then flag it */ |
803 | if (S_ISDIR(inode->i_mode) && !list_empty(&inode->i_dentry)) |
804 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
805 | |
806 | return 1; |
807 | } |
808 | |
809 | static int |
810 | cifs_init_inode(struct inode *inode, void *opaque) |
811 | { |
812 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; |
813 | |
814 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; |
815 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
816 | return 0; |
817 | } |
818 | |
819 | /* |
820 | * walk dentry list for an inode and report whether it has aliases that |
821 | * are hashed. We use this to determine if a directory inode can actually |
822 | * be used. |
823 | */ |
824 | static bool |
825 | inode_has_hashed_dentries(struct inode *inode) |
826 | { |
827 | struct dentry *dentry; |
828 | |
829 | spin_lock(&inode->i_lock); |
830 | list_for_each_entry(dentry, &inode->i_dentry, d_alias) { |
831 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
832 | spin_unlock(&inode->i_lock); |
833 | return true; |
834 | } |
835 | } |
836 | spin_unlock(&inode->i_lock); |
837 | return false; |
838 | } |
839 | |
840 | /* Given fattrs, get a corresponding inode */ |
841 | struct inode * |
842 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) |
843 | { |
844 | unsigned long hash; |
845 | struct inode *inode; |
846 | |
847 | retry_iget5_locked: |
848 | cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid); |
849 | |
850 | /* hash down to 32-bits on 32-bit arch */ |
851 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); |
852 | |
853 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); |
854 | if (inode) { |
855 | /* was there a potentially problematic inode collision? */ |
856 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
857 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
858 | |
859 | if (inode_has_hashed_dentries(inode)) { |
860 | cifs_autodisable_serverino(CIFS_SB(sb)); |
861 | iput(inode); |
862 | fattr->cf_uniqueid = iunique(sb, ROOT_I); |
863 | goto retry_iget5_locked; |
864 | } |
865 | } |
866 | |
867 | cifs_fattr_to_inode(inode, fattr); |
868 | if (sb->s_flags & MS_NOATIME) |
869 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
870 | if (inode->i_state & I_NEW) { |
871 | inode->i_ino = hash; |
872 | if (S_ISREG(inode->i_mode)) |
873 | inode->i_data.backing_dev_info = sb->s_bdi; |
874 | #ifdef CONFIG_CIFS_FSCACHE |
875 | /* initialize per-inode cache cookie pointer */ |
876 | CIFS_I(inode)->fscache = NULL; |
877 | #endif |
878 | unlock_new_inode(inode); |
879 | } |
880 | } |
881 | |
882 | return inode; |
883 | } |
884 | |
885 | /* gets root inode */ |
886 | struct inode *cifs_root_iget(struct super_block *sb) |
887 | { |
888 | int xid; |
889 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
890 | struct inode *inode = NULL; |
891 | long rc; |
892 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
893 | |
894 | xid = GetXid(); |
895 | if (tcon->unix_ext) |
896 | rc = cifs_get_inode_info_unix(&inode, "", sb, xid); |
897 | else |
898 | rc = cifs_get_inode_info(&inode, "", NULL, sb, xid, NULL); |
899 | |
900 | if (!inode) { |
901 | inode = ERR_PTR(rc); |
902 | goto out; |
903 | } |
904 | |
905 | #ifdef CONFIG_CIFS_FSCACHE |
906 | /* populate tcon->resource_id */ |
907 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
908 | #endif |
909 | |
910 | if (rc && tcon->ipc) { |
911 | cFYI(1, "ipc connection - fake read inode"); |
912 | inode->i_mode |= S_IFDIR; |
913 | inode->i_nlink = 2; |
914 | inode->i_op = &cifs_ipc_inode_ops; |
915 | inode->i_fop = &simple_dir_operations; |
916 | inode->i_uid = cifs_sb->mnt_uid; |
917 | inode->i_gid = cifs_sb->mnt_gid; |
918 | } else if (rc) { |
919 | iget_failed(inode); |
920 | inode = ERR_PTR(rc); |
921 | } |
922 | |
923 | out: |
924 | /* can not call macro FreeXid here since in a void func |
925 | * TODO: This is no longer true |
926 | */ |
927 | _FreeXid(xid); |
928 | return inode; |
929 | } |
930 | |
931 | static int |
932 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, |
933 | char *full_path, __u32 dosattr) |
934 | { |
935 | int rc; |
936 | int oplock = 0; |
937 | __u16 netfid; |
938 | __u32 netpid; |
939 | bool set_time = false; |
940 | struct cifsFileInfo *open_file; |
941 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
942 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
943 | struct tcon_link *tlink = NULL; |
944 | struct cifs_tcon *pTcon; |
945 | FILE_BASIC_INFO info_buf; |
946 | |
947 | if (attrs == NULL) |
948 | return -EINVAL; |
949 | |
950 | if (attrs->ia_valid & ATTR_ATIME) { |
951 | set_time = true; |
952 | info_buf.LastAccessTime = |
953 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
954 | } else |
955 | info_buf.LastAccessTime = 0; |
956 | |
957 | if (attrs->ia_valid & ATTR_MTIME) { |
958 | set_time = true; |
959 | info_buf.LastWriteTime = |
960 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
961 | } else |
962 | info_buf.LastWriteTime = 0; |
963 | |
964 | /* |
965 | * Samba throws this field away, but windows may actually use it. |
966 | * Do not set ctime unless other time stamps are changed explicitly |
967 | * (i.e. by utimes()) since we would then have a mix of client and |
968 | * server times. |
969 | */ |
970 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
971 | cFYI(1, "CIFS - CTIME changed"); |
972 | info_buf.ChangeTime = |
973 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
974 | } else |
975 | info_buf.ChangeTime = 0; |
976 | |
977 | info_buf.CreationTime = 0; /* don't change */ |
978 | info_buf.Attributes = cpu_to_le32(dosattr); |
979 | |
980 | /* |
981 | * If the file is already open for write, just use that fileid |
982 | */ |
983 | open_file = find_writable_file(cifsInode, true); |
984 | if (open_file) { |
985 | netfid = open_file->netfid; |
986 | netpid = open_file->pid; |
987 | pTcon = tlink_tcon(open_file->tlink); |
988 | goto set_via_filehandle; |
989 | } |
990 | |
991 | tlink = cifs_sb_tlink(cifs_sb); |
992 | if (IS_ERR(tlink)) { |
993 | rc = PTR_ERR(tlink); |
994 | tlink = NULL; |
995 | goto out; |
996 | } |
997 | pTcon = tlink_tcon(tlink); |
998 | |
999 | /* |
1000 | * NT4 apparently returns success on this call, but it doesn't |
1001 | * really work. |
1002 | */ |
1003 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { |
1004 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, |
1005 | &info_buf, cifs_sb->local_nls, |
1006 | cifs_sb->mnt_cifs_flags & |
1007 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1008 | if (rc == 0) { |
1009 | cifsInode->cifsAttrs = dosattr; |
1010 | goto out; |
1011 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) |
1012 | goto out; |
1013 | } |
1014 | |
1015 | cFYI(1, "calling SetFileInfo since SetPathInfo for " |
1016 | "times not supported by this server"); |
1017 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
1018 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, |
1019 | CREATE_NOT_DIR, &netfid, &oplock, |
1020 | NULL, cifs_sb->local_nls, |
1021 | cifs_sb->mnt_cifs_flags & |
1022 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1023 | |
1024 | if (rc != 0) { |
1025 | if (rc == -EIO) |
1026 | rc = -EINVAL; |
1027 | goto out; |
1028 | } |
1029 | |
1030 | netpid = current->tgid; |
1031 | |
1032 | set_via_filehandle: |
1033 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); |
1034 | if (!rc) |
1035 | cifsInode->cifsAttrs = dosattr; |
1036 | |
1037 | if (open_file == NULL) |
1038 | CIFSSMBClose(xid, pTcon, netfid); |
1039 | else |
1040 | cifsFileInfo_put(open_file); |
1041 | out: |
1042 | if (tlink != NULL) |
1043 | cifs_put_tlink(tlink); |
1044 | return rc; |
1045 | } |
1046 | |
1047 | /* |
1048 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
1049 | * and rename it to a random name that hopefully won't conflict with |
1050 | * anything else. |
1051 | */ |
1052 | static int |
1053 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
1054 | { |
1055 | int oplock = 0; |
1056 | int rc; |
1057 | __u16 netfid; |
1058 | struct inode *inode = dentry->d_inode; |
1059 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1060 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1061 | struct tcon_link *tlink; |
1062 | struct cifs_tcon *tcon; |
1063 | __u32 dosattr, origattr; |
1064 | FILE_BASIC_INFO *info_buf = NULL; |
1065 | |
1066 | tlink = cifs_sb_tlink(cifs_sb); |
1067 | if (IS_ERR(tlink)) |
1068 | return PTR_ERR(tlink); |
1069 | tcon = tlink_tcon(tlink); |
1070 | |
1071 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, |
1072 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
1073 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
1074 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1075 | if (rc != 0) |
1076 | goto out; |
1077 | |
1078 | origattr = cifsInode->cifsAttrs; |
1079 | if (origattr == 0) |
1080 | origattr |= ATTR_NORMAL; |
1081 | |
1082 | dosattr = origattr & ~ATTR_READONLY; |
1083 | if (dosattr == 0) |
1084 | dosattr |= ATTR_NORMAL; |
1085 | dosattr |= ATTR_HIDDEN; |
1086 | |
1087 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1088 | if (dosattr != origattr) { |
1089 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); |
1090 | if (info_buf == NULL) { |
1091 | rc = -ENOMEM; |
1092 | goto out_close; |
1093 | } |
1094 | info_buf->Attributes = cpu_to_le32(dosattr); |
1095 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, |
1096 | current->tgid); |
1097 | /* although we would like to mark the file hidden |
1098 | if that fails we will still try to rename it */ |
1099 | if (rc != 0) |
1100 | cifsInode->cifsAttrs = dosattr; |
1101 | else |
1102 | dosattr = origattr; /* since not able to change them */ |
1103 | } |
1104 | |
1105 | /* rename the file */ |
1106 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, |
1107 | cifs_sb->mnt_cifs_flags & |
1108 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1109 | if (rc != 0) { |
1110 | rc = -ETXTBSY; |
1111 | goto undo_setattr; |
1112 | } |
1113 | |
1114 | /* try to set DELETE_ON_CLOSE */ |
1115 | if (!cifsInode->delete_pending) { |
1116 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, |
1117 | current->tgid); |
1118 | /* |
1119 | * some samba versions return -ENOENT when we try to set the |
1120 | * file disposition here. Likely a samba bug, but work around |
1121 | * it for now. This means that some cifsXXX files may hang |
1122 | * around after they shouldn't. |
1123 | * |
1124 | * BB: remove this hack after more servers have the fix |
1125 | */ |
1126 | if (rc == -ENOENT) |
1127 | rc = 0; |
1128 | else if (rc != 0) { |
1129 | rc = -ETXTBSY; |
1130 | goto undo_rename; |
1131 | } |
1132 | cifsInode->delete_pending = true; |
1133 | } |
1134 | |
1135 | out_close: |
1136 | CIFSSMBClose(xid, tcon, netfid); |
1137 | out: |
1138 | kfree(info_buf); |
1139 | cifs_put_tlink(tlink); |
1140 | return rc; |
1141 | |
1142 | /* |
1143 | * reset everything back to the original state. Don't bother |
1144 | * dealing with errors here since we can't do anything about |
1145 | * them anyway. |
1146 | */ |
1147 | undo_rename: |
1148 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, |
1149 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
1150 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1151 | undo_setattr: |
1152 | if (dosattr != origattr) { |
1153 | info_buf->Attributes = cpu_to_le32(origattr); |
1154 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, |
1155 | current->tgid)) |
1156 | cifsInode->cifsAttrs = origattr; |
1157 | } |
1158 | |
1159 | goto out_close; |
1160 | } |
1161 | |
1162 | |
1163 | /* |
1164 | * If dentry->d_inode is null (usually meaning the cached dentry |
1165 | * is a negative dentry) then we would attempt a standard SMB delete, but |
1166 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1167 | * but will return the EACCESS to the caller. Note that the VFS does not call |
1168 | * unlink on negative dentries currently. |
1169 | */ |
1170 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1171 | { |
1172 | int rc = 0; |
1173 | int xid; |
1174 | char *full_path = NULL; |
1175 | struct inode *inode = dentry->d_inode; |
1176 | struct cifsInodeInfo *cifs_inode; |
1177 | struct super_block *sb = dir->i_sb; |
1178 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1179 | struct tcon_link *tlink; |
1180 | struct cifs_tcon *tcon; |
1181 | struct iattr *attrs = NULL; |
1182 | __u32 dosattr = 0, origattr = 0; |
1183 | |
1184 | cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); |
1185 | |
1186 | tlink = cifs_sb_tlink(cifs_sb); |
1187 | if (IS_ERR(tlink)) |
1188 | return PTR_ERR(tlink); |
1189 | tcon = tlink_tcon(tlink); |
1190 | |
1191 | xid = GetXid(); |
1192 | |
1193 | /* Unlink can be called from rename so we can not take the |
1194 | * sb->s_vfs_rename_mutex here */ |
1195 | full_path = build_path_from_dentry(dentry); |
1196 | if (full_path == NULL) { |
1197 | rc = -ENOMEM; |
1198 | goto unlink_out; |
1199 | } |
1200 | |
1201 | if ((tcon->ses->capabilities & CAP_UNIX) && |
1202 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1203 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
1204 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
1205 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
1206 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1207 | cFYI(1, "posix del rc %d", rc); |
1208 | if ((rc == 0) || (rc == -ENOENT)) |
1209 | goto psx_del_no_retry; |
1210 | } |
1211 | |
1212 | retry_std_delete: |
1213 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
1214 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1215 | |
1216 | psx_del_no_retry: |
1217 | if (!rc) { |
1218 | if (inode) |
1219 | drop_nlink(inode); |
1220 | } else if (rc == -ENOENT) { |
1221 | d_drop(dentry); |
1222 | } else if (rc == -ETXTBSY) { |
1223 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
1224 | if (rc == 0) |
1225 | drop_nlink(inode); |
1226 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
1227 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1228 | if (attrs == NULL) { |
1229 | rc = -ENOMEM; |
1230 | goto out_reval; |
1231 | } |
1232 | |
1233 | /* try to reset dos attributes */ |
1234 | cifs_inode = CIFS_I(inode); |
1235 | origattr = cifs_inode->cifsAttrs; |
1236 | if (origattr == 0) |
1237 | origattr |= ATTR_NORMAL; |
1238 | dosattr = origattr & ~ATTR_READONLY; |
1239 | if (dosattr == 0) |
1240 | dosattr |= ATTR_NORMAL; |
1241 | dosattr |= ATTR_HIDDEN; |
1242 | |
1243 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
1244 | if (rc != 0) |
1245 | goto out_reval; |
1246 | |
1247 | goto retry_std_delete; |
1248 | } |
1249 | |
1250 | /* undo the setattr if we errored out and it's needed */ |
1251 | if (rc != 0 && dosattr != 0) |
1252 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); |
1253 | |
1254 | out_reval: |
1255 | if (inode) { |
1256 | cifs_inode = CIFS_I(inode); |
1257 | cifs_inode->time = 0; /* will force revalidate to get info |
1258 | when needed */ |
1259 | inode->i_ctime = current_fs_time(sb); |
1260 | } |
1261 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
1262 | cifs_inode = CIFS_I(dir); |
1263 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1264 | unlink_out: |
1265 | kfree(full_path); |
1266 | kfree(attrs); |
1267 | FreeXid(xid); |
1268 | cifs_put_tlink(tlink); |
1269 | return rc; |
1270 | } |
1271 | |
1272 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
1273 | { |
1274 | int rc = 0, tmprc; |
1275 | int xid; |
1276 | struct cifs_sb_info *cifs_sb; |
1277 | struct tcon_link *tlink; |
1278 | struct cifs_tcon *pTcon; |
1279 | char *full_path = NULL; |
1280 | struct inode *newinode = NULL; |
1281 | struct cifs_fattr fattr; |
1282 | |
1283 | cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode); |
1284 | |
1285 | cifs_sb = CIFS_SB(inode->i_sb); |
1286 | tlink = cifs_sb_tlink(cifs_sb); |
1287 | if (IS_ERR(tlink)) |
1288 | return PTR_ERR(tlink); |
1289 | pTcon = tlink_tcon(tlink); |
1290 | |
1291 | xid = GetXid(); |
1292 | |
1293 | full_path = build_path_from_dentry(direntry); |
1294 | if (full_path == NULL) { |
1295 | rc = -ENOMEM; |
1296 | goto mkdir_out; |
1297 | } |
1298 | |
1299 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1300 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1301 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1302 | u32 oplock = 0; |
1303 | FILE_UNIX_BASIC_INFO *pInfo = |
1304 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
1305 | if (pInfo == NULL) { |
1306 | rc = -ENOMEM; |
1307 | goto mkdir_out; |
1308 | } |
1309 | |
1310 | mode &= ~current_umask(); |
1311 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1312 | mode, NULL /* netfid */, pInfo, &oplock, |
1313 | full_path, cifs_sb->local_nls, |
1314 | cifs_sb->mnt_cifs_flags & |
1315 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1316 | if (rc == -EOPNOTSUPP) { |
1317 | kfree(pInfo); |
1318 | goto mkdir_retry_old; |
1319 | } else if (rc) { |
1320 | cFYI(1, "posix mkdir returned 0x%x", rc); |
1321 | d_drop(direntry); |
1322 | } else { |
1323 | if (pInfo->Type == cpu_to_le32(-1)) { |
1324 | /* no return info, go query for it */ |
1325 | kfree(pInfo); |
1326 | goto mkdir_get_info; |
1327 | } |
1328 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1329 | to set uid/gid */ |
1330 | inc_nlink(inode); |
1331 | |
1332 | cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
1333 | cifs_fill_uniqueid(inode->i_sb, &fattr); |
1334 | newinode = cifs_iget(inode->i_sb, &fattr); |
1335 | if (!newinode) { |
1336 | kfree(pInfo); |
1337 | goto mkdir_get_info; |
1338 | } |
1339 | |
1340 | d_instantiate(direntry, newinode); |
1341 | |
1342 | #ifdef CONFIG_CIFS_DEBUG2 |
1343 | cFYI(1, "instantiated dentry %p %s to inode %p", |
1344 | direntry, direntry->d_name.name, newinode); |
1345 | |
1346 | if (newinode->i_nlink != 2) |
1347 | cFYI(1, "unexpected number of links %d", |
1348 | newinode->i_nlink); |
1349 | #endif |
1350 | } |
1351 | kfree(pInfo); |
1352 | goto mkdir_out; |
1353 | } |
1354 | mkdir_retry_old: |
1355 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
1356 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1357 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1358 | if (rc) { |
1359 | cFYI(1, "cifs_mkdir returned 0x%x", rc); |
1360 | d_drop(direntry); |
1361 | } else { |
1362 | mkdir_get_info: |
1363 | inc_nlink(inode); |
1364 | if (pTcon->unix_ext) |
1365 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
1366 | inode->i_sb, xid); |
1367 | else |
1368 | rc = cifs_get_inode_info(&newinode, full_path, NULL, |
1369 | inode->i_sb, xid, NULL); |
1370 | |
1371 | d_instantiate(direntry, newinode); |
1372 | /* setting nlink not necessary except in cases where we |
1373 | * failed to get it from the server or was set bogus */ |
1374 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
1375 | direntry->d_inode->i_nlink = 2; |
1376 | |
1377 | mode &= ~current_umask(); |
1378 | /* must turn on setgid bit if parent dir has it */ |
1379 | if (inode->i_mode & S_ISGID) |
1380 | mode |= S_ISGID; |
1381 | |
1382 | if (pTcon->unix_ext) { |
1383 | struct cifs_unix_set_info_args args = { |
1384 | .mode = mode, |
1385 | .ctime = NO_CHANGE_64, |
1386 | .atime = NO_CHANGE_64, |
1387 | .mtime = NO_CHANGE_64, |
1388 | .device = 0, |
1389 | }; |
1390 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
1391 | args.uid = (__u64)current_fsuid(); |
1392 | if (inode->i_mode & S_ISGID) |
1393 | args.gid = (__u64)inode->i_gid; |
1394 | else |
1395 | args.gid = (__u64)current_fsgid(); |
1396 | } else { |
1397 | args.uid = NO_CHANGE_64; |
1398 | args.gid = NO_CHANGE_64; |
1399 | } |
1400 | CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
1401 | cifs_sb->local_nls, |
1402 | cifs_sb->mnt_cifs_flags & |
1403 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1404 | } else { |
1405 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1406 | (mode & S_IWUGO) == 0) { |
1407 | FILE_BASIC_INFO pInfo; |
1408 | struct cifsInodeInfo *cifsInode; |
1409 | u32 dosattrs; |
1410 | |
1411 | memset(&pInfo, 0, sizeof(pInfo)); |
1412 | cifsInode = CIFS_I(newinode); |
1413 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; |
1414 | pInfo.Attributes = cpu_to_le32(dosattrs); |
1415 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, |
1416 | full_path, &pInfo, |
1417 | cifs_sb->local_nls, |
1418 | cifs_sb->mnt_cifs_flags & |
1419 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1420 | if (tmprc == 0) |
1421 | cifsInode->cifsAttrs = dosattrs; |
1422 | } |
1423 | if (direntry->d_inode) { |
1424 | if (cifs_sb->mnt_cifs_flags & |
1425 | CIFS_MOUNT_DYNPERM) |
1426 | direntry->d_inode->i_mode = |
1427 | (mode | S_IFDIR); |
1428 | |
1429 | if (cifs_sb->mnt_cifs_flags & |
1430 | CIFS_MOUNT_SET_UID) { |
1431 | direntry->d_inode->i_uid = |
1432 | current_fsuid(); |
1433 | if (inode->i_mode & S_ISGID) |
1434 | direntry->d_inode->i_gid = |
1435 | inode->i_gid; |
1436 | else |
1437 | direntry->d_inode->i_gid = |
1438 | current_fsgid(); |
1439 | } |
1440 | } |
1441 | } |
1442 | } |
1443 | mkdir_out: |
1444 | kfree(full_path); |
1445 | FreeXid(xid); |
1446 | cifs_put_tlink(tlink); |
1447 | return rc; |
1448 | } |
1449 | |
1450 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) |
1451 | { |
1452 | int rc = 0; |
1453 | int xid; |
1454 | struct cifs_sb_info *cifs_sb; |
1455 | struct tcon_link *tlink; |
1456 | struct cifs_tcon *pTcon; |
1457 | char *full_path = NULL; |
1458 | struct cifsInodeInfo *cifsInode; |
1459 | |
1460 | cFYI(1, "cifs_rmdir, inode = 0x%p", inode); |
1461 | |
1462 | xid = GetXid(); |
1463 | |
1464 | full_path = build_path_from_dentry(direntry); |
1465 | if (full_path == NULL) { |
1466 | rc = -ENOMEM; |
1467 | goto rmdir_exit; |
1468 | } |
1469 | |
1470 | cifs_sb = CIFS_SB(inode->i_sb); |
1471 | tlink = cifs_sb_tlink(cifs_sb); |
1472 | if (IS_ERR(tlink)) { |
1473 | rc = PTR_ERR(tlink); |
1474 | goto rmdir_exit; |
1475 | } |
1476 | pTcon = tlink_tcon(tlink); |
1477 | |
1478 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1479 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
1480 | cifs_put_tlink(tlink); |
1481 | |
1482 | if (!rc) { |
1483 | drop_nlink(inode); |
1484 | spin_lock(&direntry->d_inode->i_lock); |
1485 | i_size_write(direntry->d_inode, 0); |
1486 | clear_nlink(direntry->d_inode); |
1487 | spin_unlock(&direntry->d_inode->i_lock); |
1488 | } |
1489 | |
1490 | cifsInode = CIFS_I(direntry->d_inode); |
1491 | cifsInode->time = 0; /* force revalidate to go get info when |
1492 | needed */ |
1493 | |
1494 | cifsInode = CIFS_I(inode); |
1495 | cifsInode->time = 0; /* force revalidate to get parent dir info |
1496 | since cached search results now invalid */ |
1497 | |
1498 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1499 | current_fs_time(inode->i_sb); |
1500 | |
1501 | rmdir_exit: |
1502 | kfree(full_path); |
1503 | FreeXid(xid); |
1504 | return rc; |
1505 | } |
1506 | |
1507 | static int |
1508 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, |
1509 | struct dentry *to_dentry, const char *toPath) |
1510 | { |
1511 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); |
1512 | struct tcon_link *tlink; |
1513 | struct cifs_tcon *pTcon; |
1514 | __u16 srcfid; |
1515 | int oplock, rc; |
1516 | |
1517 | tlink = cifs_sb_tlink(cifs_sb); |
1518 | if (IS_ERR(tlink)) |
1519 | return PTR_ERR(tlink); |
1520 | pTcon = tlink_tcon(tlink); |
1521 | |
1522 | /* try path-based rename first */ |
1523 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, |
1524 | cifs_sb->mnt_cifs_flags & |
1525 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1526 | |
1527 | /* |
1528 | * don't bother with rename by filehandle unless file is busy and |
1529 | * source Note that cross directory moves do not work with |
1530 | * rename by filehandle to various Windows servers. |
1531 | */ |
1532 | if (rc == 0 || rc != -ETXTBSY) |
1533 | goto do_rename_exit; |
1534 | |
1535 | /* open-file renames don't work across directories */ |
1536 | if (to_dentry->d_parent != from_dentry->d_parent) |
1537 | goto do_rename_exit; |
1538 | |
1539 | /* open the file to be renamed -- we need DELETE perms */ |
1540 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, |
1541 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, |
1542 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
1543 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1544 | |
1545 | if (rc == 0) { |
1546 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, |
1547 | (const char *) to_dentry->d_name.name, |
1548 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
1549 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1550 | |
1551 | CIFSSMBClose(xid, pTcon, srcfid); |
1552 | } |
1553 | do_rename_exit: |
1554 | cifs_put_tlink(tlink); |
1555 | return rc; |
1556 | } |
1557 | |
1558 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1559 | struct inode *target_dir, struct dentry *target_dentry) |
1560 | { |
1561 | char *fromName = NULL; |
1562 | char *toName = NULL; |
1563 | struct cifs_sb_info *cifs_sb; |
1564 | struct tcon_link *tlink; |
1565 | struct cifs_tcon *tcon; |
1566 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1567 | FILE_UNIX_BASIC_INFO *info_buf_target; |
1568 | int xid, rc, tmprc; |
1569 | |
1570 | cifs_sb = CIFS_SB(source_dir->i_sb); |
1571 | tlink = cifs_sb_tlink(cifs_sb); |
1572 | if (IS_ERR(tlink)) |
1573 | return PTR_ERR(tlink); |
1574 | tcon = tlink_tcon(tlink); |
1575 | |
1576 | xid = GetXid(); |
1577 | |
1578 | /* |
1579 | * we already have the rename sem so we do not need to |
1580 | * grab it again here to protect the path integrity |
1581 | */ |
1582 | fromName = build_path_from_dentry(source_dentry); |
1583 | if (fromName == NULL) { |
1584 | rc = -ENOMEM; |
1585 | goto cifs_rename_exit; |
1586 | } |
1587 | |
1588 | toName = build_path_from_dentry(target_dentry); |
1589 | if (toName == NULL) { |
1590 | rc = -ENOMEM; |
1591 | goto cifs_rename_exit; |
1592 | } |
1593 | |
1594 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1595 | target_dentry, toName); |
1596 | |
1597 | if (rc == -EEXIST && tcon->unix_ext) { |
1598 | /* |
1599 | * Are src and dst hardlinks of same inode? We can |
1600 | * only tell with unix extensions enabled |
1601 | */ |
1602 | info_buf_source = |
1603 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), |
1604 | GFP_KERNEL); |
1605 | if (info_buf_source == NULL) { |
1606 | rc = -ENOMEM; |
1607 | goto cifs_rename_exit; |
1608 | } |
1609 | |
1610 | info_buf_target = info_buf_source + 1; |
1611 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
1612 | info_buf_source, |
1613 | cifs_sb->local_nls, |
1614 | cifs_sb->mnt_cifs_flags & |
1615 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1616 | if (tmprc != 0) |
1617 | goto unlink_target; |
1618 | |
1619 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName, |
1620 | info_buf_target, |
1621 | cifs_sb->local_nls, |
1622 | cifs_sb->mnt_cifs_flags & |
1623 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1624 | |
1625 | if (tmprc == 0 && (info_buf_source->UniqueId == |
1626 | info_buf_target->UniqueId)) { |
1627 | /* same file, POSIX says that this is a noop */ |
1628 | rc = 0; |
1629 | goto cifs_rename_exit; |
1630 | } |
1631 | } /* else ... BB we could add the same check for Windows by |
1632 | checking the UniqueId via FILE_INTERNAL_INFO */ |
1633 | |
1634 | unlink_target: |
1635 | /* Try unlinking the target dentry if it's not negative */ |
1636 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { |
1637 | tmprc = cifs_unlink(target_dir, target_dentry); |
1638 | if (tmprc) |
1639 | goto cifs_rename_exit; |
1640 | |
1641 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1642 | target_dentry, toName); |
1643 | } |
1644 | |
1645 | cifs_rename_exit: |
1646 | kfree(info_buf_source); |
1647 | kfree(fromName); |
1648 | kfree(toName); |
1649 | FreeXid(xid); |
1650 | cifs_put_tlink(tlink); |
1651 | return rc; |
1652 | } |
1653 | |
1654 | static bool |
1655 | cifs_inode_needs_reval(struct inode *inode) |
1656 | { |
1657 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
1658 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1659 | |
1660 | if (cifs_i->clientCanCacheRead) |
1661 | return false; |
1662 | |
1663 | if (!lookupCacheEnabled) |
1664 | return true; |
1665 | |
1666 | if (cifs_i->time == 0) |
1667 | return true; |
1668 | |
1669 | if (!time_in_range(jiffies, cifs_i->time, |
1670 | cifs_i->time + cifs_sb->actimeo)) |
1671 | return true; |
1672 | |
1673 | /* hardlinked files w/ noserverino get "special" treatment */ |
1674 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
1675 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
1676 | return true; |
1677 | |
1678 | return false; |
1679 | } |
1680 | |
1681 | /* |
1682 | * Zap the cache. Called when invalid_mapping flag is set. |
1683 | */ |
1684 | int |
1685 | cifs_invalidate_mapping(struct inode *inode) |
1686 | { |
1687 | int rc = 0; |
1688 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
1689 | |
1690 | cifs_i->invalid_mapping = false; |
1691 | |
1692 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
1693 | rc = invalidate_inode_pages2(inode->i_mapping); |
1694 | if (rc) { |
1695 | cERROR(1, "%s: could not invalidate inode %p", __func__, |
1696 | inode); |
1697 | cifs_i->invalid_mapping = true; |
1698 | } |
1699 | } |
1700 | |
1701 | cifs_fscache_reset_inode_cookie(inode); |
1702 | return rc; |
1703 | } |
1704 | |
1705 | int cifs_revalidate_file_attr(struct file *filp) |
1706 | { |
1707 | int rc = 0; |
1708 | struct inode *inode = filp->f_path.dentry->d_inode; |
1709 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
1710 | |
1711 | if (!cifs_inode_needs_reval(inode)) |
1712 | return rc; |
1713 | |
1714 | if (tlink_tcon(cfile->tlink)->unix_ext) |
1715 | rc = cifs_get_file_info_unix(filp); |
1716 | else |
1717 | rc = cifs_get_file_info(filp); |
1718 | |
1719 | return rc; |
1720 | } |
1721 | |
1722 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
1723 | { |
1724 | int xid; |
1725 | int rc = 0; |
1726 | struct inode *inode = dentry->d_inode; |
1727 | struct super_block *sb = dentry->d_sb; |
1728 | char *full_path = NULL; |
1729 | |
1730 | if (inode == NULL) |
1731 | return -ENOENT; |
1732 | |
1733 | if (!cifs_inode_needs_reval(inode)) |
1734 | return rc; |
1735 | |
1736 | xid = GetXid(); |
1737 | |
1738 | /* can not safely grab the rename sem here if rename calls revalidate |
1739 | since that would deadlock */ |
1740 | full_path = build_path_from_dentry(dentry); |
1741 | if (full_path == NULL) { |
1742 | rc = -ENOMEM; |
1743 | goto out; |
1744 | } |
1745 | |
1746 | cFYI(1, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time " |
1747 | "%ld jiffies %ld", full_path, inode, inode->i_count.counter, |
1748 | dentry, dentry->d_time, jiffies); |
1749 | |
1750 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) |
1751 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
1752 | else |
1753 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, |
1754 | xid, NULL); |
1755 | |
1756 | out: |
1757 | kfree(full_path); |
1758 | FreeXid(xid); |
1759 | return rc; |
1760 | } |
1761 | |
1762 | int cifs_revalidate_file(struct file *filp) |
1763 | { |
1764 | int rc; |
1765 | struct inode *inode = filp->f_path.dentry->d_inode; |
1766 | |
1767 | rc = cifs_revalidate_file_attr(filp); |
1768 | if (rc) |
1769 | return rc; |
1770 | |
1771 | if (CIFS_I(inode)->invalid_mapping) |
1772 | rc = cifs_invalidate_mapping(inode); |
1773 | return rc; |
1774 | } |
1775 | |
1776 | /* revalidate a dentry's inode attributes */ |
1777 | int cifs_revalidate_dentry(struct dentry *dentry) |
1778 | { |
1779 | int rc; |
1780 | struct inode *inode = dentry->d_inode; |
1781 | |
1782 | rc = cifs_revalidate_dentry_attr(dentry); |
1783 | if (rc) |
1784 | return rc; |
1785 | |
1786 | if (CIFS_I(inode)->invalid_mapping) |
1787 | rc = cifs_invalidate_mapping(inode); |
1788 | return rc; |
1789 | } |
1790 | |
1791 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
1792 | struct kstat *stat) |
1793 | { |
1794 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
1795 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
1796 | struct inode *inode = dentry->d_inode; |
1797 | int rc; |
1798 | |
1799 | /* |
1800 | * We need to be sure that all dirty pages are written and the server |
1801 | * has actual ctime, mtime and file length. |
1802 | */ |
1803 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && |
1804 | inode->i_mapping->nrpages != 0) { |
1805 | rc = filemap_fdatawait(inode->i_mapping); |
1806 | if (rc) { |
1807 | mapping_set_error(inode->i_mapping, rc); |
1808 | return rc; |
1809 | } |
1810 | } |
1811 | |
1812 | rc = cifs_revalidate_dentry_attr(dentry); |
1813 | if (rc) |
1814 | return rc; |
1815 | |
1816 | generic_fillattr(inode, stat); |
1817 | stat->blksize = CIFS_MAX_MSGSIZE; |
1818 | stat->ino = CIFS_I(inode)->uniqueid; |
1819 | |
1820 | /* |
1821 | * If on a multiuser mount without unix extensions, and the admin hasn't |
1822 | * overridden them, set the ownership to the fsuid/fsgid of the current |
1823 | * process. |
1824 | */ |
1825 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && |
1826 | !tcon->unix_ext) { |
1827 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) |
1828 | stat->uid = current_fsuid(); |
1829 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) |
1830 | stat->gid = current_fsgid(); |
1831 | } |
1832 | return rc; |
1833 | } |
1834 | |
1835 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) |
1836 | { |
1837 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
1838 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); |
1839 | struct page *page; |
1840 | int rc = 0; |
1841 | |
1842 | page = grab_cache_page(mapping, index); |
1843 | if (!page) |
1844 | return -ENOMEM; |
1845 | |
1846 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1847 | unlock_page(page); |
1848 | page_cache_release(page); |
1849 | return rc; |
1850 | } |
1851 | |
1852 | static void cifs_setsize(struct inode *inode, loff_t offset) |
1853 | { |
1854 | loff_t oldsize; |
1855 | |
1856 | spin_lock(&inode->i_lock); |
1857 | oldsize = inode->i_size; |
1858 | i_size_write(inode, offset); |
1859 | spin_unlock(&inode->i_lock); |
1860 | |
1861 | truncate_pagecache(inode, oldsize, offset); |
1862 | } |
1863 | |
1864 | static int |
1865 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, |
1866 | int xid, char *full_path) |
1867 | { |
1868 | int rc; |
1869 | struct cifsFileInfo *open_file; |
1870 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1871 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1872 | struct tcon_link *tlink = NULL; |
1873 | struct cifs_tcon *pTcon = NULL; |
1874 | struct cifs_io_parms io_parms; |
1875 | |
1876 | /* |
1877 | * To avoid spurious oplock breaks from server, in the case of |
1878 | * inodes that we already have open, avoid doing path based |
1879 | * setting of file size if we can do it by handle. |
1880 | * This keeps our caching token (oplock) and avoids timeouts |
1881 | * when the local oplock break takes longer to flush |
1882 | * writebehind data than the SMB timeout for the SetPathInfo |
1883 | * request would allow |
1884 | */ |
1885 | open_file = find_writable_file(cifsInode, true); |
1886 | if (open_file) { |
1887 | __u16 nfid = open_file->netfid; |
1888 | __u32 npid = open_file->pid; |
1889 | pTcon = tlink_tcon(open_file->tlink); |
1890 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, |
1891 | npid, false); |
1892 | cifsFileInfo_put(open_file); |
1893 | cFYI(1, "SetFSize for attrs rc = %d", rc); |
1894 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1895 | unsigned int bytes_written; |
1896 | |
1897 | io_parms.netfid = nfid; |
1898 | io_parms.pid = npid; |
1899 | io_parms.tcon = pTcon; |
1900 | io_parms.offset = 0; |
1901 | io_parms.length = attrs->ia_size; |
1902 | rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, |
1903 | NULL, NULL, 1); |
1904 | cFYI(1, "Wrt seteof rc %d", rc); |
1905 | } |
1906 | } else |
1907 | rc = -EINVAL; |
1908 | |
1909 | if (rc != 0) { |
1910 | if (pTcon == NULL) { |
1911 | tlink = cifs_sb_tlink(cifs_sb); |
1912 | if (IS_ERR(tlink)) |
1913 | return PTR_ERR(tlink); |
1914 | pTcon = tlink_tcon(tlink); |
1915 | } |
1916 | |
1917 | /* Set file size by pathname rather than by handle |
1918 | either because no valid, writeable file handle for |
1919 | it was found or because there was an error setting |
1920 | it by handle */ |
1921 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, |
1922 | false, cifs_sb->local_nls, |
1923 | cifs_sb->mnt_cifs_flags & |
1924 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1925 | cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); |
1926 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1927 | __u16 netfid; |
1928 | int oplock = 0; |
1929 | |
1930 | rc = SMBLegacyOpen(xid, pTcon, full_path, |
1931 | FILE_OPEN, GENERIC_WRITE, |
1932 | CREATE_NOT_DIR, &netfid, &oplock, NULL, |
1933 | cifs_sb->local_nls, |
1934 | cifs_sb->mnt_cifs_flags & |
1935 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1936 | if (rc == 0) { |
1937 | unsigned int bytes_written; |
1938 | |
1939 | io_parms.netfid = netfid; |
1940 | io_parms.pid = current->tgid; |
1941 | io_parms.tcon = pTcon; |
1942 | io_parms.offset = 0; |
1943 | io_parms.length = attrs->ia_size; |
1944 | rc = CIFSSMBWrite(xid, &io_parms, |
1945 | &bytes_written, |
1946 | NULL, NULL, 1); |
1947 | cFYI(1, "wrt seteof rc %d", rc); |
1948 | CIFSSMBClose(xid, pTcon, netfid); |
1949 | } |
1950 | } |
1951 | if (tlink) |
1952 | cifs_put_tlink(tlink); |
1953 | } |
1954 | |
1955 | if (rc == 0) { |
1956 | cifsInode->server_eof = attrs->ia_size; |
1957 | cifs_setsize(inode, attrs->ia_size); |
1958 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
1959 | } |
1960 | |
1961 | return rc; |
1962 | } |
1963 | |
1964 | static int |
1965 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) |
1966 | { |
1967 | int rc; |
1968 | int xid; |
1969 | char *full_path = NULL; |
1970 | struct inode *inode = direntry->d_inode; |
1971 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1972 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1973 | struct tcon_link *tlink; |
1974 | struct cifs_tcon *pTcon; |
1975 | struct cifs_unix_set_info_args *args = NULL; |
1976 | struct cifsFileInfo *open_file; |
1977 | |
1978 | cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x", |
1979 | direntry->d_name.name, attrs->ia_valid); |
1980 | |
1981 | xid = GetXid(); |
1982 | |
1983 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
1984 | attrs->ia_valid |= ATTR_FORCE; |
1985 | |
1986 | rc = inode_change_ok(inode, attrs); |
1987 | if (rc < 0) |
1988 | goto out; |
1989 | |
1990 | full_path = build_path_from_dentry(direntry); |
1991 | if (full_path == NULL) { |
1992 | rc = -ENOMEM; |
1993 | goto out; |
1994 | } |
1995 | |
1996 | /* |
1997 | * Attempt to flush data before changing attributes. We need to do |
1998 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the |
1999 | * ownership or mode then we may also need to do this. Here, we take |
2000 | * the safe way out and just do the flush on all setattr requests. If |
2001 | * the flush returns error, store it to report later and continue. |
2002 | * |
2003 | * BB: This should be smarter. Why bother flushing pages that |
2004 | * will be truncated anyway? Also, should we error out here if |
2005 | * the flush returns error? |
2006 | */ |
2007 | rc = filemap_write_and_wait(inode->i_mapping); |
2008 | mapping_set_error(inode->i_mapping, rc); |
2009 | rc = 0; |
2010 | |
2011 | if (attrs->ia_valid & ATTR_SIZE) { |
2012 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2013 | if (rc != 0) |
2014 | goto out; |
2015 | } |
2016 | |
2017 | /* skip mode change if it's just for clearing setuid/setgid */ |
2018 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
2019 | attrs->ia_valid &= ~ATTR_MODE; |
2020 | |
2021 | args = kmalloc(sizeof(*args), GFP_KERNEL); |
2022 | if (args == NULL) { |
2023 | rc = -ENOMEM; |
2024 | goto out; |
2025 | } |
2026 | |
2027 | /* set up the struct */ |
2028 | if (attrs->ia_valid & ATTR_MODE) |
2029 | args->mode = attrs->ia_mode; |
2030 | else |
2031 | args->mode = NO_CHANGE_64; |
2032 | |
2033 | if (attrs->ia_valid & ATTR_UID) |
2034 | args->uid = attrs->ia_uid; |
2035 | else |
2036 | args->uid = NO_CHANGE_64; |
2037 | |
2038 | if (attrs->ia_valid & ATTR_GID) |
2039 | args->gid = attrs->ia_gid; |
2040 | else |
2041 | args->gid = NO_CHANGE_64; |
2042 | |
2043 | if (attrs->ia_valid & ATTR_ATIME) |
2044 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
2045 | else |
2046 | args->atime = NO_CHANGE_64; |
2047 | |
2048 | if (attrs->ia_valid & ATTR_MTIME) |
2049 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
2050 | else |
2051 | args->mtime = NO_CHANGE_64; |
2052 | |
2053 | if (attrs->ia_valid & ATTR_CTIME) |
2054 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
2055 | else |
2056 | args->ctime = NO_CHANGE_64; |
2057 | |
2058 | args->device = 0; |
2059 | open_file = find_writable_file(cifsInode, true); |
2060 | if (open_file) { |
2061 | u16 nfid = open_file->netfid; |
2062 | u32 npid = open_file->pid; |
2063 | pTcon = tlink_tcon(open_file->tlink); |
2064 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
2065 | cifsFileInfo_put(open_file); |
2066 | } else { |
2067 | tlink = cifs_sb_tlink(cifs_sb); |
2068 | if (IS_ERR(tlink)) { |
2069 | rc = PTR_ERR(tlink); |
2070 | goto out; |
2071 | } |
2072 | pTcon = tlink_tcon(tlink); |
2073 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
2074 | cifs_sb->local_nls, |
2075 | cifs_sb->mnt_cifs_flags & |
2076 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
2077 | cifs_put_tlink(tlink); |
2078 | } |
2079 | |
2080 | if (rc) |
2081 | goto out; |
2082 | |
2083 | if ((attrs->ia_valid & ATTR_SIZE) && |
2084 | attrs->ia_size != i_size_read(inode)) |
2085 | truncate_setsize(inode, attrs->ia_size); |
2086 | |
2087 | setattr_copy(inode, attrs); |
2088 | mark_inode_dirty(inode); |
2089 | |
2090 | /* force revalidate when any of these times are set since some |
2091 | of the fs types (eg ext3, fat) do not have fine enough |
2092 | time granularity to match protocol, and we do not have a |
2093 | a way (yet) to query the server fs's time granularity (and |
2094 | whether it rounds times down). |
2095 | */ |
2096 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) |
2097 | cifsInode->time = 0; |
2098 | out: |
2099 | kfree(args); |
2100 | kfree(full_path); |
2101 | FreeXid(xid); |
2102 | return rc; |
2103 | } |
2104 | |
2105 | static int |
2106 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) |
2107 | { |
2108 | int xid; |
2109 | struct inode *inode = direntry->d_inode; |
2110 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
2111 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2112 | char *full_path = NULL; |
2113 | int rc = -EACCES; |
2114 | __u32 dosattr = 0; |
2115 | __u64 mode = NO_CHANGE_64; |
2116 | |
2117 | xid = GetXid(); |
2118 | |
2119 | cFYI(1, "setattr on file %s attrs->iavalid 0x%x", |
2120 | direntry->d_name.name, attrs->ia_valid); |
2121 | |
2122 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2123 | attrs->ia_valid |= ATTR_FORCE; |
2124 | |
2125 | rc = inode_change_ok(inode, attrs); |
2126 | if (rc < 0) { |
2127 | FreeXid(xid); |
2128 | return rc; |
2129 | } |
2130 | |
2131 | full_path = build_path_from_dentry(direntry); |
2132 | if (full_path == NULL) { |
2133 | rc = -ENOMEM; |
2134 | FreeXid(xid); |
2135 | return rc; |
2136 | } |
2137 | |
2138 | /* |
2139 | * Attempt to flush data before changing attributes. We need to do |
2140 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the |
2141 | * ownership or mode then we may also need to do this. Here, we take |
2142 | * the safe way out and just do the flush on all setattr requests. If |
2143 | * the flush returns error, store it to report later and continue. |
2144 | * |
2145 | * BB: This should be smarter. Why bother flushing pages that |
2146 | * will be truncated anyway? Also, should we error out here if |
2147 | * the flush returns error? |
2148 | */ |
2149 | rc = filemap_write_and_wait(inode->i_mapping); |
2150 | mapping_set_error(inode->i_mapping, rc); |
2151 | rc = 0; |
2152 | |
2153 | if (attrs->ia_valid & ATTR_SIZE) { |
2154 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2155 | if (rc != 0) |
2156 | goto cifs_setattr_exit; |
2157 | } |
2158 | |
2159 | /* |
2160 | * Without unix extensions we can't send ownership changes to the |
2161 | * server, so silently ignore them. This is consistent with how |
2162 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With |
2163 | * CIFSACL support + proper Windows to Unix idmapping, we may be |
2164 | * able to support this in the future. |
2165 | */ |
2166 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
2167 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
2168 | |
2169 | /* skip mode change if it's just for clearing setuid/setgid */ |
2170 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
2171 | attrs->ia_valid &= ~ATTR_MODE; |
2172 | |
2173 | if (attrs->ia_valid & ATTR_MODE) { |
2174 | cFYI(1, "Mode changed to 0%o", attrs->ia_mode); |
2175 | mode = attrs->ia_mode; |
2176 | } |
2177 | |
2178 | if (attrs->ia_valid & ATTR_MODE) { |
2179 | rc = 0; |
2180 | #ifdef CONFIG_CIFS_ACL |
2181 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
2182 | rc = mode_to_cifs_acl(inode, full_path, mode); |
2183 | if (rc) { |
2184 | cFYI(1, "%s: Setting ACL failed with error: %d", |
2185 | __func__, rc); |
2186 | goto cifs_setattr_exit; |
2187 | } |
2188 | } else |
2189 | #endif /* CONFIG_CIFS_ACL */ |
2190 | if (((mode & S_IWUGO) == 0) && |
2191 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
2192 | |
2193 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; |
2194 | |
2195 | /* fix up mode if we're not using dynperm */ |
2196 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) |
2197 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; |
2198 | } else if ((mode & S_IWUGO) && |
2199 | (cifsInode->cifsAttrs & ATTR_READONLY)) { |
2200 | |
2201 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; |
2202 | /* Attributes of 0 are ignored */ |
2203 | if (dosattr == 0) |
2204 | dosattr |= ATTR_NORMAL; |
2205 | |
2206 | /* reset local inode permissions to normal */ |
2207 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
2208 | attrs->ia_mode &= ~(S_IALLUGO); |
2209 | if (S_ISDIR(inode->i_mode)) |
2210 | attrs->ia_mode |= |
2211 | cifs_sb->mnt_dir_mode; |
2212 | else |
2213 | attrs->ia_mode |= |
2214 | cifs_sb->mnt_file_mode; |
2215 | } |
2216 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
2217 | /* ignore mode change - ATTR_READONLY hasn't changed */ |
2218 | attrs->ia_valid &= ~ATTR_MODE; |
2219 | } |
2220 | } |
2221 | |
2222 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2223 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { |
2224 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
2225 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ |
2226 | |
2227 | /* Even if error on time set, no sense failing the call if |
2228 | the server would set the time to a reasonable value anyway, |
2229 | and this check ensures that we are not being called from |
2230 | sys_utimes in which case we ought to fail the call back to |
2231 | the user when the server rejects the call */ |
2232 | if ((rc) && (attrs->ia_valid & |
2233 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
2234 | rc = 0; |
2235 | } |
2236 | |
2237 | /* do not need local check to inode_check_ok since the server does |
2238 | that */ |
2239 | if (rc) |
2240 | goto cifs_setattr_exit; |
2241 | |
2242 | if ((attrs->ia_valid & ATTR_SIZE) && |
2243 | attrs->ia_size != i_size_read(inode)) |
2244 | truncate_setsize(inode, attrs->ia_size); |
2245 | |
2246 | setattr_copy(inode, attrs); |
2247 | mark_inode_dirty(inode); |
2248 | |
2249 | cifs_setattr_exit: |
2250 | kfree(full_path); |
2251 | FreeXid(xid); |
2252 | return rc; |
2253 | } |
2254 | |
2255 | int |
2256 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
2257 | { |
2258 | struct inode *inode = direntry->d_inode; |
2259 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
2260 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
2261 | |
2262 | if (pTcon->unix_ext) |
2263 | return cifs_setattr_unix(direntry, attrs); |
2264 | |
2265 | return cifs_setattr_nounix(direntry, attrs); |
2266 | |
2267 | /* BB: add cifs_setattr_legacy for really old servers */ |
2268 | } |
2269 | |
2270 | #if 0 |
2271 | void cifs_delete_inode(struct inode *inode) |
2272 | { |
2273 | cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode); |
2274 | /* may have to add back in if and when safe distributed caching of |
2275 | directories added e.g. via FindNotify */ |
2276 | } |
2277 | #endif |
2278 |
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v2.6.34-rc5
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