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