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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 | ||
128 | cifs_revalidate_cache(inode, fattr); | |
129 | ||
130 | spin_lock(&inode->i_lock); | |
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 | set_nlink(inode, 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 | cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; | |
152 | ||
153 | cifs_i->server_eof = fattr->cf_eof; | |
154 | /* | |
155 | * Can't safely change the file size here if the client is writing to | |
156 | * it due to potential races. | |
157 | */ | |
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 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) | |
171 | inode->i_flags |= S_AUTOMOUNT; | |
172 | cifs_set_ops(inode); | |
173 | } | |
174 | ||
175 | void | |
176 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
177 | { | |
178 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
179 | ||
180 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
181 | return; | |
182 | ||
183 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
184 | } | |
185 | ||
186 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ | |
187 | void | |
188 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
189 | struct cifs_sb_info *cifs_sb) | |
190 | { | |
191 | memset(fattr, 0, sizeof(*fattr)); | |
192 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
193 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
194 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
195 | ||
196 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
197 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
198 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
199 | fattr->cf_mode = le64_to_cpu(info->Permissions); | |
200 | ||
201 | /* | |
202 | * Since we set the inode type below we need to mask off | |
203 | * to avoid strange results if bits set above. | |
204 | */ | |
205 | fattr->cf_mode &= ~S_IFMT; | |
206 | switch (le32_to_cpu(info->Type)) { | |
207 | case UNIX_FILE: | |
208 | fattr->cf_mode |= S_IFREG; | |
209 | fattr->cf_dtype = DT_REG; | |
210 | break; | |
211 | case UNIX_SYMLINK: | |
212 | fattr->cf_mode |= S_IFLNK; | |
213 | fattr->cf_dtype = DT_LNK; | |
214 | break; | |
215 | case UNIX_DIR: | |
216 | fattr->cf_mode |= S_IFDIR; | |
217 | fattr->cf_dtype = DT_DIR; | |
218 | break; | |
219 | case UNIX_CHARDEV: | |
220 | fattr->cf_mode |= S_IFCHR; | |
221 | fattr->cf_dtype = DT_CHR; | |
222 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
223 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
224 | break; | |
225 | case UNIX_BLOCKDEV: | |
226 | fattr->cf_mode |= S_IFBLK; | |
227 | fattr->cf_dtype = DT_BLK; | |
228 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
229 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
230 | break; | |
231 | case UNIX_FIFO: | |
232 | fattr->cf_mode |= S_IFIFO; | |
233 | fattr->cf_dtype = DT_FIFO; | |
234 | break; | |
235 | case UNIX_SOCKET: | |
236 | fattr->cf_mode |= S_IFSOCK; | |
237 | fattr->cf_dtype = DT_SOCK; | |
238 | break; | |
239 | default: | |
240 | /* safest to call it a file if we do not know */ | |
241 | fattr->cf_mode |= S_IFREG; | |
242 | fattr->cf_dtype = DT_REG; | |
243 | cFYI(1, "unknown type %d", le32_to_cpu(info->Type)); | |
244 | break; | |
245 | } | |
246 | ||
247 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) | |
248 | fattr->cf_uid = cifs_sb->mnt_uid; | |
249 | else | |
250 | fattr->cf_uid = le64_to_cpu(info->Uid); | |
251 | ||
252 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
253 | fattr->cf_gid = cifs_sb->mnt_gid; | |
254 | else | |
255 | fattr->cf_gid = le64_to_cpu(info->Gid); | |
256 | ||
257 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); | |
258 | } | |
259 | ||
260 | /* | |
261 | * Fill a cifs_fattr struct with fake inode info. | |
262 | * | |
263 | * Needed to setup cifs_fattr data for the directory which is the | |
264 | * junction to the new submount (ie to setup the fake directory | |
265 | * which represents a DFS referral). | |
266 | */ | |
267 | static void | |
268 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) | |
269 | { | |
270 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
271 | ||
272 | cFYI(1, "creating fake fattr for DFS referral"); | |
273 | ||
274 | memset(fattr, 0, sizeof(*fattr)); | |
275 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
276 | fattr->cf_uid = cifs_sb->mnt_uid; | |
277 | fattr->cf_gid = cifs_sb->mnt_gid; | |
278 | fattr->cf_atime = CURRENT_TIME; | |
279 | fattr->cf_ctime = CURRENT_TIME; | |
280 | fattr->cf_mtime = CURRENT_TIME; | |
281 | fattr->cf_nlink = 2; | |
282 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
283 | } | |
284 | ||
285 | int cifs_get_file_info_unix(struct file *filp) | |
286 | { | |
287 | int rc; | |
288 | unsigned int xid; | |
289 | FILE_UNIX_BASIC_INFO find_data; | |
290 | struct cifs_fattr fattr; | |
291 | struct inode *inode = filp->f_path.dentry->d_inode; | |
292 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
293 | struct cifsFileInfo *cfile = filp->private_data; | |
294 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); | |
295 | ||
296 | xid = get_xid(); | |
297 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); | |
298 | if (!rc) { | |
299 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
300 | } else if (rc == -EREMOTE) { | |
301 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
302 | rc = 0; | |
303 | } | |
304 | ||
305 | cifs_fattr_to_inode(inode, &fattr); | |
306 | free_xid(xid); | |
307 | return rc; | |
308 | } | |
309 | ||
310 | int cifs_get_inode_info_unix(struct inode **pinode, | |
311 | const unsigned char *full_path, | |
312 | struct super_block *sb, unsigned int xid) | |
313 | { | |
314 | int rc; | |
315 | FILE_UNIX_BASIC_INFO find_data; | |
316 | struct cifs_fattr fattr; | |
317 | struct cifs_tcon *tcon; | |
318 | struct tcon_link *tlink; | |
319 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
320 | ||
321 | cFYI(1, "Getting info on %s", full_path); | |
322 | ||
323 | tlink = cifs_sb_tlink(cifs_sb); | |
324 | if (IS_ERR(tlink)) | |
325 | return PTR_ERR(tlink); | |
326 | tcon = tlink_tcon(tlink); | |
327 | ||
328 | /* could have done a find first instead but this returns more info */ | |
329 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, | |
330 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
331 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
332 | cifs_put_tlink(tlink); | |
333 | ||
334 | if (!rc) { | |
335 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
336 | } else if (rc == -EREMOTE) { | |
337 | cifs_create_dfs_fattr(&fattr, sb); | |
338 | rc = 0; | |
339 | } else { | |
340 | return rc; | |
341 | } | |
342 | ||
343 | /* check for Minshall+French symlinks */ | |
344 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
345 | int tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); | |
346 | if (tmprc) | |
347 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); | |
348 | } | |
349 | ||
350 | if (*pinode == NULL) { | |
351 | /* get new inode */ | |
352 | cifs_fill_uniqueid(sb, &fattr); | |
353 | *pinode = cifs_iget(sb, &fattr); | |
354 | if (!*pinode) | |
355 | rc = -ENOMEM; | |
356 | } else { | |
357 | /* we already have inode, update it */ | |
358 | cifs_fattr_to_inode(*pinode, &fattr); | |
359 | } | |
360 | ||
361 | return rc; | |
362 | } | |
363 | ||
364 | static int | |
365 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, | |
366 | struct cifs_sb_info *cifs_sb, unsigned int xid) | |
367 | { | |
368 | int rc; | |
369 | int oplock = 0; | |
370 | __u16 netfid; | |
371 | struct tcon_link *tlink; | |
372 | struct cifs_tcon *tcon; | |
373 | struct cifs_io_parms io_parms; | |
374 | char buf[24]; | |
375 | unsigned int bytes_read; | |
376 | char *pbuf; | |
377 | ||
378 | pbuf = buf; | |
379 | ||
380 | fattr->cf_mode &= ~S_IFMT; | |
381 | ||
382 | if (fattr->cf_eof == 0) { | |
383 | fattr->cf_mode |= S_IFIFO; | |
384 | fattr->cf_dtype = DT_FIFO; | |
385 | return 0; | |
386 | } else if (fattr->cf_eof < 8) { | |
387 | fattr->cf_mode |= S_IFREG; | |
388 | fattr->cf_dtype = DT_REG; | |
389 | return -EINVAL; /* EOPNOTSUPP? */ | |
390 | } | |
391 | ||
392 | tlink = cifs_sb_tlink(cifs_sb); | |
393 | if (IS_ERR(tlink)) | |
394 | return PTR_ERR(tlink); | |
395 | tcon = tlink_tcon(tlink); | |
396 | ||
397 | rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ, | |
398 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
399 | cifs_sb->local_nls, | |
400 | cifs_sb->mnt_cifs_flags & | |
401 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
402 | if (rc == 0) { | |
403 | int buf_type = CIFS_NO_BUFFER; | |
404 | /* Read header */ | |
405 | io_parms.netfid = netfid; | |
406 | io_parms.pid = current->tgid; | |
407 | io_parms.tcon = tcon; | |
408 | io_parms.offset = 0; | |
409 | io_parms.length = 24; | |
410 | rc = CIFSSMBRead(xid, &io_parms, &bytes_read, &pbuf, | |
411 | &buf_type); | |
412 | if ((rc == 0) && (bytes_read >= 8)) { | |
413 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
414 | cFYI(1, "Block device"); | |
415 | fattr->cf_mode |= S_IFBLK; | |
416 | fattr->cf_dtype = DT_BLK; | |
417 | if (bytes_read == 24) { | |
418 | /* we have enough to decode dev num */ | |
419 | __u64 mjr; /* major */ | |
420 | __u64 mnr; /* minor */ | |
421 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
422 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
423 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
424 | } | |
425 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { | |
426 | cFYI(1, "Char device"); | |
427 | fattr->cf_mode |= S_IFCHR; | |
428 | fattr->cf_dtype = DT_CHR; | |
429 | if (bytes_read == 24) { | |
430 | /* we have enough to decode dev num */ | |
431 | __u64 mjr; /* major */ | |
432 | __u64 mnr; /* minor */ | |
433 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
434 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
435 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
436 | } | |
437 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
438 | cFYI(1, "Symlink"); | |
439 | fattr->cf_mode |= S_IFLNK; | |
440 | fattr->cf_dtype = DT_LNK; | |
441 | } else { | |
442 | fattr->cf_mode |= S_IFREG; /* file? */ | |
443 | fattr->cf_dtype = DT_REG; | |
444 | rc = -EOPNOTSUPP; | |
445 | } | |
446 | } else { | |
447 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
448 | fattr->cf_dtype = DT_REG; | |
449 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
450 | } | |
451 | CIFSSMBClose(xid, tcon, netfid); | |
452 | } | |
453 | cifs_put_tlink(tlink); | |
454 | return rc; | |
455 | } | |
456 | ||
457 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ | |
458 | ||
459 | /* | |
460 | * Fetch mode bits as provided by SFU. | |
461 | * | |
462 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
463 | */ | |
464 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
465 | struct cifs_sb_info *cifs_sb, unsigned int xid) | |
466 | { | |
467 | #ifdef CONFIG_CIFS_XATTR | |
468 | ssize_t rc; | |
469 | char ea_value[4]; | |
470 | __u32 mode; | |
471 | struct tcon_link *tlink; | |
472 | struct cifs_tcon *tcon; | |
473 | ||
474 | tlink = cifs_sb_tlink(cifs_sb); | |
475 | if (IS_ERR(tlink)) | |
476 | return PTR_ERR(tlink); | |
477 | tcon = tlink_tcon(tlink); | |
478 | ||
479 | rc = CIFSSMBQAllEAs(xid, tcon, path, "SETFILEBITS", | |
480 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, | |
481 | cifs_sb->mnt_cifs_flags & | |
482 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
483 | cifs_put_tlink(tlink); | |
484 | if (rc < 0) | |
485 | return (int)rc; | |
486 | else if (rc > 3) { | |
487 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
488 | fattr->cf_mode &= ~SFBITS_MASK; | |
489 | cFYI(1, "special bits 0%o org mode 0%o", mode, | |
490 | fattr->cf_mode); | |
491 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; | |
492 | cFYI(1, "special mode bits 0%o", mode); | |
493 | } | |
494 | ||
495 | return 0; | |
496 | #else | |
497 | return -EOPNOTSUPP; | |
498 | #endif | |
499 | } | |
500 | ||
501 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ | |
502 | static void | |
503 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, | |
504 | struct cifs_sb_info *cifs_sb, bool adjust_tz) | |
505 | { | |
506 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
507 | ||
508 | memset(fattr, 0, sizeof(*fattr)); | |
509 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
510 | if (info->DeletePending) | |
511 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
512 | ||
513 | if (info->LastAccessTime) | |
514 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
515 | else | |
516 | fattr->cf_atime = CURRENT_TIME; | |
517 | ||
518 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
519 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
520 | ||
521 | if (adjust_tz) { | |
522 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; | |
523 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
524 | } | |
525 | ||
526 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
527 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
528 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); | |
529 | ||
530 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
531 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
532 | fattr->cf_dtype = DT_DIR; | |
533 | /* | |
534 | * Server can return wrong NumberOfLinks value for directories | |
535 | * when Unix extensions are disabled - fake it. | |
536 | */ | |
537 | fattr->cf_nlink = 2; | |
538 | } else { | |
539 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
540 | fattr->cf_dtype = DT_REG; | |
541 | ||
542 | /* clear write bits if ATTR_READONLY is set */ | |
543 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
544 | fattr->cf_mode &= ~(S_IWUGO); | |
545 | ||
546 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); | |
547 | } | |
548 | ||
549 | fattr->cf_uid = cifs_sb->mnt_uid; | |
550 | fattr->cf_gid = cifs_sb->mnt_gid; | |
551 | } | |
552 | ||
553 | int cifs_get_file_info(struct file *filp) | |
554 | { | |
555 | int rc; | |
556 | unsigned int xid; | |
557 | FILE_ALL_INFO find_data; | |
558 | struct cifs_fattr fattr; | |
559 | struct inode *inode = filp->f_path.dentry->d_inode; | |
560 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
561 | struct cifsFileInfo *cfile = filp->private_data; | |
562 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); | |
563 | ||
564 | xid = get_xid(); | |
565 | rc = CIFSSMBQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); | |
566 | switch (rc) { | |
567 | case 0: | |
568 | cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); | |
569 | break; | |
570 | case -EREMOTE: | |
571 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
572 | rc = 0; | |
573 | break; | |
574 | case -EOPNOTSUPP: | |
575 | case -EINVAL: | |
576 | /* | |
577 | * FIXME: legacy server -- fall back to path-based call? | |
578 | * for now, just skip revalidating and mark inode for | |
579 | * immediate reval. | |
580 | */ | |
581 | rc = 0; | |
582 | CIFS_I(inode)->time = 0; | |
583 | default: | |
584 | goto cgfi_exit; | |
585 | } | |
586 | ||
587 | /* | |
588 | * don't bother with SFU junk here -- just mark inode as needing | |
589 | * revalidation. | |
590 | */ | |
591 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; | |
592 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
593 | cifs_fattr_to_inode(inode, &fattr); | |
594 | cgfi_exit: | |
595 | free_xid(xid); | |
596 | return rc; | |
597 | } | |
598 | ||
599 | int | |
600 | cifs_get_inode_info(struct inode **inode, const char *full_path, | |
601 | FILE_ALL_INFO *data, struct super_block *sb, int xid, | |
602 | const __u16 *fid) | |
603 | { | |
604 | int rc = 0, tmprc; | |
605 | struct cifs_tcon *tcon; | |
606 | struct TCP_Server_Info *server; | |
607 | struct tcon_link *tlink; | |
608 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
609 | char *buf = NULL; | |
610 | bool adjust_tz = false; | |
611 | struct cifs_fattr fattr; | |
612 | ||
613 | tlink = cifs_sb_tlink(cifs_sb); | |
614 | if (IS_ERR(tlink)) | |
615 | return PTR_ERR(tlink); | |
616 | tcon = tlink_tcon(tlink); | |
617 | server = tcon->ses->server; | |
618 | ||
619 | cFYI(1, "Getting info on %s", full_path); | |
620 | ||
621 | if ((data == NULL) && (*inode != NULL)) { | |
622 | if (CIFS_I(*inode)->clientCanCacheRead) { | |
623 | cFYI(1, "No need to revalidate cached inode sizes"); | |
624 | goto cgii_exit; | |
625 | } | |
626 | } | |
627 | ||
628 | /* if inode info is not passed, get it from server */ | |
629 | if (data == NULL) { | |
630 | if (!server->ops->query_path_info) { | |
631 | rc = -ENOSYS; | |
632 | goto cgii_exit; | |
633 | } | |
634 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); | |
635 | if (buf == NULL) { | |
636 | rc = -ENOMEM; | |
637 | goto cgii_exit; | |
638 | } | |
639 | data = (FILE_ALL_INFO *)buf; | |
640 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path, | |
641 | data, &adjust_tz); | |
642 | } | |
643 | ||
644 | if (!rc) { | |
645 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *)data, cifs_sb, | |
646 | adjust_tz); | |
647 | } else if (rc == -EREMOTE) { | |
648 | cifs_create_dfs_fattr(&fattr, sb); | |
649 | rc = 0; | |
650 | } else { | |
651 | goto cgii_exit; | |
652 | } | |
653 | ||
654 | /* | |
655 | * If an inode wasn't passed in, then get the inode number | |
656 | * | |
657 | * Is an i_ino of zero legal? Can we use that to check if the server | |
658 | * supports returning inode numbers? Are there other sanity checks we | |
659 | * can use to ensure that the server is really filling in that field? | |
660 | */ | |
661 | if (*inode == NULL) { | |
662 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
663 | if (server->ops->get_srv_inum) | |
664 | tmprc = server->ops->get_srv_inum(xid, tcon, | |
665 | cifs_sb, full_path, &fattr.cf_uniqueid, | |
666 | data); | |
667 | else | |
668 | tmprc = -ENOSYS; | |
669 | if (tmprc || !fattr.cf_uniqueid) { | |
670 | cFYI(1, "GetSrvInodeNum rc %d", tmprc); | |
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(*inode)->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_ACL | |
690 | /* fill in 0777 bits from ACL */ | |
691 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
692 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid); | |
693 | if (rc) { | |
694 | cFYI(1, "%s: Getting ACL failed with error: %d", | |
695 | __func__, rc); | |
696 | goto cgii_exit; | |
697 | } | |
698 | } | |
699 | #endif /* CONFIG_CIFS_ACL */ | |
700 | ||
701 | /* fill in remaining high mode bits e.g. SUID, VTX */ | |
702 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
703 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
704 | ||
705 | /* check for Minshall+French symlinks */ | |
706 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
707 | tmprc = CIFSCheckMFSymlink(&fattr, full_path, cifs_sb, xid); | |
708 | if (tmprc) | |
709 | cFYI(1, "CIFSCheckMFSymlink: %d", tmprc); | |
710 | } | |
711 | ||
712 | if (!*inode) { | |
713 | *inode = cifs_iget(sb, &fattr); | |
714 | if (!*inode) | |
715 | rc = -ENOMEM; | |
716 | } else { | |
717 | cifs_fattr_to_inode(*inode, &fattr); | |
718 | } | |
719 | ||
720 | cgii_exit: | |
721 | kfree(buf); | |
722 | cifs_put_tlink(tlink); | |
723 | return rc; | |
724 | } | |
725 | ||
726 | static const struct inode_operations cifs_ipc_inode_ops = { | |
727 | .lookup = cifs_lookup, | |
728 | }; | |
729 | ||
730 | static int | |
731 | cifs_find_inode(struct inode *inode, void *opaque) | |
732 | { | |
733 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
734 | ||
735 | /* don't match inode with different uniqueid */ | |
736 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) | |
737 | return 0; | |
738 | ||
739 | /* use createtime like an i_generation field */ | |
740 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
741 | return 0; | |
742 | ||
743 | /* don't match inode of different type */ | |
744 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
745 | return 0; | |
746 | ||
747 | /* if it's not a directory or has no dentries, then flag it */ | |
748 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) | |
749 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; | |
750 | ||
751 | return 1; | |
752 | } | |
753 | ||
754 | static int | |
755 | cifs_init_inode(struct inode *inode, void *opaque) | |
756 | { | |
757 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
758 | ||
759 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
760 | CIFS_I(inode)->createtime = fattr->cf_createtime; | |
761 | return 0; | |
762 | } | |
763 | ||
764 | /* | |
765 | * walk dentry list for an inode and report whether it has aliases that | |
766 | * are hashed. We use this to determine if a directory inode can actually | |
767 | * be used. | |
768 | */ | |
769 | static bool | |
770 | inode_has_hashed_dentries(struct inode *inode) | |
771 | { | |
772 | struct dentry *dentry; | |
773 | struct hlist_node *p; | |
774 | ||
775 | spin_lock(&inode->i_lock); | |
776 | hlist_for_each_entry(dentry, p, &inode->i_dentry, d_alias) { | |
777 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { | |
778 | spin_unlock(&inode->i_lock); | |
779 | return true; | |
780 | } | |
781 | } | |
782 | spin_unlock(&inode->i_lock); | |
783 | return false; | |
784 | } | |
785 | ||
786 | /* Given fattrs, get a corresponding inode */ | |
787 | struct inode * | |
788 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
789 | { | |
790 | unsigned long hash; | |
791 | struct inode *inode; | |
792 | ||
793 | retry_iget5_locked: | |
794 | cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid); | |
795 | ||
796 | /* hash down to 32-bits on 32-bit arch */ | |
797 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
798 | ||
799 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
800 | if (inode) { | |
801 | /* was there a potentially problematic inode collision? */ | |
802 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { | |
803 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; | |
804 | ||
805 | if (inode_has_hashed_dentries(inode)) { | |
806 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
807 | iput(inode); | |
808 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
809 | goto retry_iget5_locked; | |
810 | } | |
811 | } | |
812 | ||
813 | cifs_fattr_to_inode(inode, fattr); | |
814 | if (sb->s_flags & MS_NOATIME) | |
815 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
816 | if (inode->i_state & I_NEW) { | |
817 | inode->i_ino = hash; | |
818 | if (S_ISREG(inode->i_mode)) | |
819 | inode->i_data.backing_dev_info = sb->s_bdi; | |
820 | #ifdef CONFIG_CIFS_FSCACHE | |
821 | /* initialize per-inode cache cookie pointer */ | |
822 | CIFS_I(inode)->fscache = NULL; | |
823 | #endif | |
824 | unlock_new_inode(inode); | |
825 | } | |
826 | } | |
827 | ||
828 | return inode; | |
829 | } | |
830 | ||
831 | /* gets root inode */ | |
832 | struct inode *cifs_root_iget(struct super_block *sb) | |
833 | { | |
834 | unsigned int xid; | |
835 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
836 | struct inode *inode = NULL; | |
837 | long rc; | |
838 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
839 | ||
840 | xid = get_xid(); | |
841 | if (tcon->unix_ext) | |
842 | rc = cifs_get_inode_info_unix(&inode, "", sb, xid); | |
843 | else | |
844 | rc = cifs_get_inode_info(&inode, "", NULL, sb, xid, NULL); | |
845 | ||
846 | if (!inode) { | |
847 | inode = ERR_PTR(rc); | |
848 | goto out; | |
849 | } | |
850 | ||
851 | #ifdef CONFIG_CIFS_FSCACHE | |
852 | /* populate tcon->resource_id */ | |
853 | tcon->resource_id = CIFS_I(inode)->uniqueid; | |
854 | #endif | |
855 | ||
856 | if (rc && tcon->ipc) { | |
857 | cFYI(1, "ipc connection - fake read inode"); | |
858 | spin_lock(&inode->i_lock); | |
859 | inode->i_mode |= S_IFDIR; | |
860 | set_nlink(inode, 2); | |
861 | inode->i_op = &cifs_ipc_inode_ops; | |
862 | inode->i_fop = &simple_dir_operations; | |
863 | inode->i_uid = cifs_sb->mnt_uid; | |
864 | inode->i_gid = cifs_sb->mnt_gid; | |
865 | spin_unlock(&inode->i_lock); | |
866 | } else if (rc) { | |
867 | iget_failed(inode); | |
868 | inode = ERR_PTR(rc); | |
869 | } | |
870 | ||
871 | out: | |
872 | /* can not call macro free_xid here since in a void func | |
873 | * TODO: This is no longer true | |
874 | */ | |
875 | _free_xid(xid); | |
876 | return inode; | |
877 | } | |
878 | ||
879 | int | |
880 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, | |
881 | char *full_path, __u32 dosattr) | |
882 | { | |
883 | int rc; | |
884 | int oplock = 0; | |
885 | __u16 netfid; | |
886 | __u32 netpid; | |
887 | bool set_time = false; | |
888 | struct cifsFileInfo *open_file; | |
889 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
890 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
891 | struct tcon_link *tlink = NULL; | |
892 | struct cifs_tcon *pTcon; | |
893 | FILE_BASIC_INFO info_buf; | |
894 | ||
895 | if (attrs == NULL) | |
896 | return -EINVAL; | |
897 | ||
898 | if (attrs->ia_valid & ATTR_ATIME) { | |
899 | set_time = true; | |
900 | info_buf.LastAccessTime = | |
901 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
902 | } else | |
903 | info_buf.LastAccessTime = 0; | |
904 | ||
905 | if (attrs->ia_valid & ATTR_MTIME) { | |
906 | set_time = true; | |
907 | info_buf.LastWriteTime = | |
908 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
909 | } else | |
910 | info_buf.LastWriteTime = 0; | |
911 | ||
912 | /* | |
913 | * Samba throws this field away, but windows may actually use it. | |
914 | * Do not set ctime unless other time stamps are changed explicitly | |
915 | * (i.e. by utimes()) since we would then have a mix of client and | |
916 | * server times. | |
917 | */ | |
918 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
919 | cFYI(1, "CIFS - CTIME changed"); | |
920 | info_buf.ChangeTime = | |
921 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
922 | } else | |
923 | info_buf.ChangeTime = 0; | |
924 | ||
925 | info_buf.CreationTime = 0; /* don't change */ | |
926 | info_buf.Attributes = cpu_to_le32(dosattr); | |
927 | ||
928 | /* | |
929 | * If the file is already open for write, just use that fileid | |
930 | */ | |
931 | open_file = find_writable_file(cifsInode, true); | |
932 | if (open_file) { | |
933 | netfid = open_file->fid.netfid; | |
934 | netpid = open_file->pid; | |
935 | pTcon = tlink_tcon(open_file->tlink); | |
936 | goto set_via_filehandle; | |
937 | } | |
938 | ||
939 | tlink = cifs_sb_tlink(cifs_sb); | |
940 | if (IS_ERR(tlink)) { | |
941 | rc = PTR_ERR(tlink); | |
942 | tlink = NULL; | |
943 | goto out; | |
944 | } | |
945 | pTcon = tlink_tcon(tlink); | |
946 | ||
947 | /* | |
948 | * NT4 apparently returns success on this call, but it doesn't | |
949 | * really work. | |
950 | */ | |
951 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
952 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
953 | &info_buf, cifs_sb->local_nls, | |
954 | cifs_sb->mnt_cifs_flags & | |
955 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
956 | if (rc == 0) { | |
957 | cifsInode->cifsAttrs = dosattr; | |
958 | goto out; | |
959 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
960 | goto out; | |
961 | } | |
962 | ||
963 | cFYI(1, "calling SetFileInfo since SetPathInfo for " | |
964 | "times not supported by this server"); | |
965 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, | |
966 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
967 | CREATE_NOT_DIR, &netfid, &oplock, | |
968 | NULL, cifs_sb->local_nls, | |
969 | cifs_sb->mnt_cifs_flags & | |
970 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
971 | ||
972 | if (rc != 0) { | |
973 | if (rc == -EIO) | |
974 | rc = -EINVAL; | |
975 | goto out; | |
976 | } | |
977 | ||
978 | netpid = current->tgid; | |
979 | ||
980 | set_via_filehandle: | |
981 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
982 | if (!rc) | |
983 | cifsInode->cifsAttrs = dosattr; | |
984 | ||
985 | if (open_file == NULL) | |
986 | CIFSSMBClose(xid, pTcon, netfid); | |
987 | else | |
988 | cifsFileInfo_put(open_file); | |
989 | out: | |
990 | if (tlink != NULL) | |
991 | cifs_put_tlink(tlink); | |
992 | return rc; | |
993 | } | |
994 | ||
995 | /* | |
996 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
997 | * and rename it to a random name that hopefully won't conflict with | |
998 | * anything else. | |
999 | */ | |
1000 | int | |
1001 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1002 | const unsigned int xid) | |
1003 | { | |
1004 | int oplock = 0; | |
1005 | int rc; | |
1006 | __u16 netfid; | |
1007 | struct inode *inode = dentry->d_inode; | |
1008 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1009 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1010 | struct tcon_link *tlink; | |
1011 | struct cifs_tcon *tcon; | |
1012 | __u32 dosattr, origattr; | |
1013 | FILE_BASIC_INFO *info_buf = NULL; | |
1014 | ||
1015 | tlink = cifs_sb_tlink(cifs_sb); | |
1016 | if (IS_ERR(tlink)) | |
1017 | return PTR_ERR(tlink); | |
1018 | tcon = tlink_tcon(tlink); | |
1019 | ||
1020 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
1021 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, | |
1022 | &netfid, &oplock, NULL, cifs_sb->local_nls, | |
1023 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1024 | if (rc != 0) | |
1025 | goto out; | |
1026 | ||
1027 | origattr = cifsInode->cifsAttrs; | |
1028 | if (origattr == 0) | |
1029 | origattr |= ATTR_NORMAL; | |
1030 | ||
1031 | dosattr = origattr & ~ATTR_READONLY; | |
1032 | if (dosattr == 0) | |
1033 | dosattr |= ATTR_NORMAL; | |
1034 | dosattr |= ATTR_HIDDEN; | |
1035 | ||
1036 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ | |
1037 | if (dosattr != origattr) { | |
1038 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1039 | if (info_buf == NULL) { | |
1040 | rc = -ENOMEM; | |
1041 | goto out_close; | |
1042 | } | |
1043 | info_buf->Attributes = cpu_to_le32(dosattr); | |
1044 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1045 | current->tgid); | |
1046 | /* although we would like to mark the file hidden | |
1047 | if that fails we will still try to rename it */ | |
1048 | if (rc != 0) | |
1049 | cifsInode->cifsAttrs = dosattr; | |
1050 | else | |
1051 | dosattr = origattr; /* since not able to change them */ | |
1052 | } | |
1053 | ||
1054 | /* rename the file */ | |
1055 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
1056 | cifs_sb->mnt_cifs_flags & | |
1057 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1058 | if (rc != 0) { | |
1059 | rc = -ETXTBSY; | |
1060 | goto undo_setattr; | |
1061 | } | |
1062 | ||
1063 | /* try to set DELETE_ON_CLOSE */ | |
1064 | if (!cifsInode->delete_pending) { | |
1065 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
1066 | current->tgid); | |
1067 | /* | |
1068 | * some samba versions return -ENOENT when we try to set the | |
1069 | * file disposition here. Likely a samba bug, but work around | |
1070 | * it for now. This means that some cifsXXX files may hang | |
1071 | * around after they shouldn't. | |
1072 | * | |
1073 | * BB: remove this hack after more servers have the fix | |
1074 | */ | |
1075 | if (rc == -ENOENT) | |
1076 | rc = 0; | |
1077 | else if (rc != 0) { | |
1078 | rc = -ETXTBSY; | |
1079 | goto undo_rename; | |
1080 | } | |
1081 | cifsInode->delete_pending = true; | |
1082 | } | |
1083 | ||
1084 | out_close: | |
1085 | CIFSSMBClose(xid, tcon, netfid); | |
1086 | out: | |
1087 | kfree(info_buf); | |
1088 | cifs_put_tlink(tlink); | |
1089 | return rc; | |
1090 | ||
1091 | /* | |
1092 | * reset everything back to the original state. Don't bother | |
1093 | * dealing with errors here since we can't do anything about | |
1094 | * them anyway. | |
1095 | */ | |
1096 | undo_rename: | |
1097 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
1098 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1099 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1100 | undo_setattr: | |
1101 | if (dosattr != origattr) { | |
1102 | info_buf->Attributes = cpu_to_le32(origattr); | |
1103 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1104 | current->tgid)) | |
1105 | cifsInode->cifsAttrs = origattr; | |
1106 | } | |
1107 | ||
1108 | goto out_close; | |
1109 | } | |
1110 | ||
1111 | /* copied from fs/nfs/dir.c with small changes */ | |
1112 | static void | |
1113 | cifs_drop_nlink(struct inode *inode) | |
1114 | { | |
1115 | spin_lock(&inode->i_lock); | |
1116 | if (inode->i_nlink > 0) | |
1117 | drop_nlink(inode); | |
1118 | spin_unlock(&inode->i_lock); | |
1119 | } | |
1120 | ||
1121 | /* | |
1122 | * If dentry->d_inode is null (usually meaning the cached dentry | |
1123 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
1124 | * if that fails we can not attempt the fall back mechanisms on EACCESS | |
1125 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
1126 | * unlink on negative dentries currently. | |
1127 | */ | |
1128 | int cifs_unlink(struct inode *dir, struct dentry *dentry) | |
1129 | { | |
1130 | int rc = 0; | |
1131 | unsigned int xid; | |
1132 | char *full_path = NULL; | |
1133 | struct inode *inode = dentry->d_inode; | |
1134 | struct cifsInodeInfo *cifs_inode; | |
1135 | struct super_block *sb = dir->i_sb; | |
1136 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1137 | struct tcon_link *tlink; | |
1138 | struct cifs_tcon *tcon; | |
1139 | struct TCP_Server_Info *server; | |
1140 | struct iattr *attrs = NULL; | |
1141 | __u32 dosattr = 0, origattr = 0; | |
1142 | ||
1143 | cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); | |
1144 | ||
1145 | tlink = cifs_sb_tlink(cifs_sb); | |
1146 | if (IS_ERR(tlink)) | |
1147 | return PTR_ERR(tlink); | |
1148 | tcon = tlink_tcon(tlink); | |
1149 | server = tcon->ses->server; | |
1150 | ||
1151 | xid = get_xid(); | |
1152 | ||
1153 | /* Unlink can be called from rename so we can not take the | |
1154 | * sb->s_vfs_rename_mutex here */ | |
1155 | full_path = build_path_from_dentry(dentry); | |
1156 | if (full_path == NULL) { | |
1157 | rc = -ENOMEM; | |
1158 | goto unlink_out; | |
1159 | } | |
1160 | ||
1161 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
1162 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
1163 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
1164 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, | |
1165 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1166 | cFYI(1, "posix del rc %d", rc); | |
1167 | if ((rc == 0) || (rc == -ENOENT)) | |
1168 | goto psx_del_no_retry; | |
1169 | } | |
1170 | ||
1171 | retry_std_delete: | |
1172 | if (!server->ops->unlink) { | |
1173 | rc = -ENOSYS; | |
1174 | goto psx_del_no_retry; | |
1175 | } | |
1176 | ||
1177 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
1178 | ||
1179 | psx_del_no_retry: | |
1180 | if (!rc) { | |
1181 | if (inode) | |
1182 | cifs_drop_nlink(inode); | |
1183 | } else if (rc == -ENOENT) { | |
1184 | d_drop(dentry); | |
1185 | } else if (rc == -ETXTBSY) { | |
1186 | if (server->ops->rename_pending_delete) { | |
1187 | rc = server->ops->rename_pending_delete(full_path, | |
1188 | dentry, xid); | |
1189 | if (rc == 0) | |
1190 | cifs_drop_nlink(inode); | |
1191 | } | |
1192 | if (rc == -ETXTBSY) | |
1193 | rc = -EBUSY; | |
1194 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { | |
1195 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); | |
1196 | if (attrs == NULL) { | |
1197 | rc = -ENOMEM; | |
1198 | goto out_reval; | |
1199 | } | |
1200 | ||
1201 | /* try to reset dos attributes */ | |
1202 | cifs_inode = CIFS_I(inode); | |
1203 | origattr = cifs_inode->cifsAttrs; | |
1204 | if (origattr == 0) | |
1205 | origattr |= ATTR_NORMAL; | |
1206 | dosattr = origattr & ~ATTR_READONLY; | |
1207 | if (dosattr == 0) | |
1208 | dosattr |= ATTR_NORMAL; | |
1209 | dosattr |= ATTR_HIDDEN; | |
1210 | ||
1211 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
1212 | if (rc != 0) | |
1213 | goto out_reval; | |
1214 | ||
1215 | goto retry_std_delete; | |
1216 | } | |
1217 | ||
1218 | /* undo the setattr if we errored out and it's needed */ | |
1219 | if (rc != 0 && dosattr != 0) | |
1220 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1221 | ||
1222 | out_reval: | |
1223 | if (inode) { | |
1224 | cifs_inode = CIFS_I(inode); | |
1225 | cifs_inode->time = 0; /* will force revalidate to get info | |
1226 | when needed */ | |
1227 | inode->i_ctime = current_fs_time(sb); | |
1228 | } | |
1229 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); | |
1230 | cifs_inode = CIFS_I(dir); | |
1231 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ | |
1232 | unlink_out: | |
1233 | kfree(full_path); | |
1234 | kfree(attrs); | |
1235 | free_xid(xid); | |
1236 | cifs_put_tlink(tlink); | |
1237 | return rc; | |
1238 | } | |
1239 | ||
1240 | static int | |
1241 | cifs_mkdir_qinfo(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1242 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1243 | struct cifs_tcon *tcon, const unsigned int xid) | |
1244 | { | |
1245 | int rc = 0; | |
1246 | struct inode *newinode = NULL; | |
1247 | ||
1248 | if (tcon->unix_ext) | |
1249 | rc = cifs_get_inode_info_unix(&newinode, full_path, inode->i_sb, | |
1250 | xid); | |
1251 | else | |
1252 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
1253 | inode->i_sb, xid, NULL); | |
1254 | if (rc) | |
1255 | return rc; | |
1256 | ||
1257 | d_instantiate(dentry, newinode); | |
1258 | /* | |
1259 | * setting nlink not necessary except in cases where we failed to get it | |
1260 | * from the server or was set bogus | |
1261 | */ | |
1262 | spin_lock(&dentry->d_inode->i_lock); | |
1263 | if ((dentry->d_inode) && (dentry->d_inode->i_nlink < 2)) | |
1264 | set_nlink(dentry->d_inode, 2); | |
1265 | spin_unlock(&dentry->d_inode->i_lock); | |
1266 | mode &= ~current_umask(); | |
1267 | /* must turn on setgid bit if parent dir has it */ | |
1268 | if (inode->i_mode & S_ISGID) | |
1269 | mode |= S_ISGID; | |
1270 | ||
1271 | if (tcon->unix_ext) { | |
1272 | struct cifs_unix_set_info_args args = { | |
1273 | .mode = mode, | |
1274 | .ctime = NO_CHANGE_64, | |
1275 | .atime = NO_CHANGE_64, | |
1276 | .mtime = NO_CHANGE_64, | |
1277 | .device = 0, | |
1278 | }; | |
1279 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1280 | args.uid = (__u64)current_fsuid(); | |
1281 | if (inode->i_mode & S_ISGID) | |
1282 | args.gid = (__u64)inode->i_gid; | |
1283 | else | |
1284 | args.gid = (__u64)current_fsgid(); | |
1285 | } else { | |
1286 | args.uid = NO_CHANGE_64; | |
1287 | args.gid = NO_CHANGE_64; | |
1288 | } | |
1289 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1290 | cifs_sb->local_nls, | |
1291 | cifs_sb->mnt_cifs_flags & | |
1292 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1293 | } else { | |
1294 | struct TCP_Server_Info *server = tcon->ses->server; | |
1295 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && | |
1296 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) | |
1297 | server->ops->mkdir_setinfo(newinode, full_path, cifs_sb, | |
1298 | tcon, xid); | |
1299 | if (dentry->d_inode) { | |
1300 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
1301 | dentry->d_inode->i_mode = (mode | S_IFDIR); | |
1302 | ||
1303 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1304 | dentry->d_inode->i_uid = current_fsuid(); | |
1305 | if (inode->i_mode & S_ISGID) | |
1306 | dentry->d_inode->i_gid = inode->i_gid; | |
1307 | else | |
1308 | dentry->d_inode->i_gid = | |
1309 | current_fsgid(); | |
1310 | } | |
1311 | } | |
1312 | } | |
1313 | return rc; | |
1314 | } | |
1315 | ||
1316 | static int | |
1317 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1318 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1319 | struct cifs_tcon *tcon, const unsigned int xid) | |
1320 | { | |
1321 | int rc = 0; | |
1322 | u32 oplock = 0; | |
1323 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1324 | struct inode *newinode = NULL; | |
1325 | struct cifs_fattr fattr; | |
1326 | ||
1327 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1328 | if (info == NULL) { | |
1329 | rc = -ENOMEM; | |
1330 | goto posix_mkdir_out; | |
1331 | } | |
1332 | ||
1333 | mode &= ~current_umask(); | |
1334 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1335 | NULL /* netfid */, info, &oplock, full_path, | |
1336 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1337 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1338 | if (rc == -EOPNOTSUPP) | |
1339 | goto posix_mkdir_out; | |
1340 | else if (rc) { | |
1341 | cFYI(1, "posix mkdir returned 0x%x", rc); | |
1342 | d_drop(dentry); | |
1343 | goto posix_mkdir_out; | |
1344 | } | |
1345 | ||
1346 | if (info->Type == cpu_to_le32(-1)) | |
1347 | /* no return info, go query for it */ | |
1348 | goto posix_mkdir_get_info; | |
1349 | /* | |
1350 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1351 | * need to set uid/gid. | |
1352 | */ | |
1353 | ||
1354 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1355 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1356 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1357 | if (!newinode) | |
1358 | goto posix_mkdir_get_info; | |
1359 | ||
1360 | d_instantiate(dentry, newinode); | |
1361 | ||
1362 | #ifdef CONFIG_CIFS_DEBUG2 | |
1363 | cFYI(1, "instantiated dentry %p %s to inode %p", dentry, | |
1364 | dentry->d_name.name, newinode); | |
1365 | ||
1366 | if (newinode->i_nlink != 2) | |
1367 | cFYI(1, "unexpected number of links %d", newinode->i_nlink); | |
1368 | #endif | |
1369 | ||
1370 | posix_mkdir_out: | |
1371 | kfree(info); | |
1372 | return rc; | |
1373 | posix_mkdir_get_info: | |
1374 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1375 | xid); | |
1376 | goto posix_mkdir_out; | |
1377 | } | |
1378 | ||
1379 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) | |
1380 | { | |
1381 | int rc = 0; | |
1382 | unsigned int xid; | |
1383 | struct cifs_sb_info *cifs_sb; | |
1384 | struct tcon_link *tlink; | |
1385 | struct cifs_tcon *tcon; | |
1386 | struct TCP_Server_Info *server; | |
1387 | char *full_path; | |
1388 | ||
1389 | cFYI(1, "In cifs_mkdir, mode = 0x%hx inode = 0x%p", mode, inode); | |
1390 | ||
1391 | cifs_sb = CIFS_SB(inode->i_sb); | |
1392 | tlink = cifs_sb_tlink(cifs_sb); | |
1393 | if (IS_ERR(tlink)) | |
1394 | return PTR_ERR(tlink); | |
1395 | tcon = tlink_tcon(tlink); | |
1396 | ||
1397 | xid = get_xid(); | |
1398 | ||
1399 | full_path = build_path_from_dentry(direntry); | |
1400 | if (full_path == NULL) { | |
1401 | rc = -ENOMEM; | |
1402 | goto mkdir_out; | |
1403 | } | |
1404 | ||
1405 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
1406 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
1407 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, | |
1408 | tcon, xid); | |
1409 | if (rc != -EOPNOTSUPP) | |
1410 | goto mkdir_out; | |
1411 | } | |
1412 | ||
1413 | server = tcon->ses->server; | |
1414 | ||
1415 | if (!server->ops->mkdir) { | |
1416 | rc = -ENOSYS; | |
1417 | goto mkdir_out; | |
1418 | } | |
1419 | ||
1420 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ | |
1421 | rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb); | |
1422 | if (rc) { | |
1423 | cFYI(1, "cifs_mkdir returned 0x%x", rc); | |
1424 | d_drop(direntry); | |
1425 | goto mkdir_out; | |
1426 | } | |
1427 | ||
1428 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, | |
1429 | xid); | |
1430 | mkdir_out: | |
1431 | /* | |
1432 | * Force revalidate to get parent dir info when needed since cached | |
1433 | * attributes are invalid now. | |
1434 | */ | |
1435 | CIFS_I(inode)->time = 0; | |
1436 | kfree(full_path); | |
1437 | free_xid(xid); | |
1438 | cifs_put_tlink(tlink); | |
1439 | return rc; | |
1440 | } | |
1441 | ||
1442 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1443 | { | |
1444 | int rc = 0; | |
1445 | unsigned int xid; | |
1446 | struct cifs_sb_info *cifs_sb; | |
1447 | struct tcon_link *tlink; | |
1448 | struct cifs_tcon *tcon; | |
1449 | struct TCP_Server_Info *server; | |
1450 | char *full_path = NULL; | |
1451 | struct cifsInodeInfo *cifsInode; | |
1452 | ||
1453 | cFYI(1, "cifs_rmdir, inode = 0x%p", inode); | |
1454 | ||
1455 | xid = get_xid(); | |
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 | tcon = tlink_tcon(tlink); | |
1470 | server = tcon->ses->server; | |
1471 | ||
1472 | if (!server->ops->rmdir) { | |
1473 | rc = -ENOSYS; | |
1474 | cifs_put_tlink(tlink); | |
1475 | goto rmdir_exit; | |
1476 | } | |
1477 | ||
1478 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); | |
1479 | cifs_put_tlink(tlink); | |
1480 | ||
1481 | if (!rc) { | |
1482 | spin_lock(&direntry->d_inode->i_lock); | |
1483 | i_size_write(direntry->d_inode, 0); | |
1484 | clear_nlink(direntry->d_inode); | |
1485 | spin_unlock(&direntry->d_inode->i_lock); | |
1486 | } | |
1487 | ||
1488 | cifsInode = CIFS_I(direntry->d_inode); | |
1489 | /* force revalidate to go get info when needed */ | |
1490 | cifsInode->time = 0; | |
1491 | ||
1492 | cifsInode = CIFS_I(inode); | |
1493 | /* | |
1494 | * Force revalidate to get parent dir info when needed since cached | |
1495 | * attributes are invalid now. | |
1496 | */ | |
1497 | cifsInode->time = 0; | |
1498 | ||
1499 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = | |
1500 | current_fs_time(inode->i_sb); | |
1501 | ||
1502 | rmdir_exit: | |
1503 | kfree(full_path); | |
1504 | free_xid(xid); | |
1505 | return rc; | |
1506 | } | |
1507 | ||
1508 | static int | |
1509 | cifs_do_rename(unsigned int xid, struct dentry *from_dentry, | |
1510 | const char *fromPath, struct dentry *to_dentry, | |
1511 | const char *toPath) | |
1512 | { | |
1513 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1514 | struct tcon_link *tlink; | |
1515 | struct cifs_tcon *pTcon; | |
1516 | __u16 srcfid; | |
1517 | int oplock, rc; | |
1518 | ||
1519 | tlink = cifs_sb_tlink(cifs_sb); | |
1520 | if (IS_ERR(tlink)) | |
1521 | return PTR_ERR(tlink); | |
1522 | pTcon = tlink_tcon(tlink); | |
1523 | ||
1524 | /* try path-based rename first */ | |
1525 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1526 | cifs_sb->mnt_cifs_flags & | |
1527 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1528 | ||
1529 | /* | |
1530 | * don't bother with rename by filehandle unless file is busy and | |
1531 | * source Note that cross directory moves do not work with | |
1532 | * rename by filehandle to various Windows servers. | |
1533 | */ | |
1534 | if (rc == 0 || rc != -ETXTBSY) | |
1535 | goto do_rename_exit; | |
1536 | ||
1537 | /* open-file renames don't work across directories */ | |
1538 | if (to_dentry->d_parent != from_dentry->d_parent) | |
1539 | goto do_rename_exit; | |
1540 | ||
1541 | /* open the file to be renamed -- we need DELETE perms */ | |
1542 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1543 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1544 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1545 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1546 | ||
1547 | if (rc == 0) { | |
1548 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1549 | (const char *) to_dentry->d_name.name, | |
1550 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1551 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1552 | ||
1553 | CIFSSMBClose(xid, pTcon, srcfid); | |
1554 | } | |
1555 | do_rename_exit: | |
1556 | cifs_put_tlink(tlink); | |
1557 | return rc; | |
1558 | } | |
1559 | ||
1560 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, | |
1561 | struct inode *target_dir, struct dentry *target_dentry) | |
1562 | { | |
1563 | char *fromName = NULL; | |
1564 | char *toName = NULL; | |
1565 | struct cifs_sb_info *cifs_sb; | |
1566 | struct tcon_link *tlink; | |
1567 | struct cifs_tcon *tcon; | |
1568 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; | |
1569 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
1570 | unsigned int xid; | |
1571 | int rc, tmprc; | |
1572 | ||
1573 | cifs_sb = CIFS_SB(source_dir->i_sb); | |
1574 | tlink = cifs_sb_tlink(cifs_sb); | |
1575 | if (IS_ERR(tlink)) | |
1576 | return PTR_ERR(tlink); | |
1577 | tcon = tlink_tcon(tlink); | |
1578 | ||
1579 | xid = get_xid(); | |
1580 | ||
1581 | /* | |
1582 | * we already have the rename sem so we do not need to | |
1583 | * grab it again here to protect the path integrity | |
1584 | */ | |
1585 | fromName = build_path_from_dentry(source_dentry); | |
1586 | if (fromName == NULL) { | |
1587 | rc = -ENOMEM; | |
1588 | goto cifs_rename_exit; | |
1589 | } | |
1590 | ||
1591 | toName = build_path_from_dentry(target_dentry); | |
1592 | if (toName == NULL) { | |
1593 | rc = -ENOMEM; | |
1594 | goto cifs_rename_exit; | |
1595 | } | |
1596 | ||
1597 | rc = cifs_do_rename(xid, source_dentry, fromName, | |
1598 | target_dentry, toName); | |
1599 | ||
1600 | if (rc == -EEXIST && tcon->unix_ext) { | |
1601 | /* | |
1602 | * Are src and dst hardlinks of same inode? We can | |
1603 | * only tell with unix extensions enabled | |
1604 | */ | |
1605 | info_buf_source = | |
1606 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1607 | GFP_KERNEL); | |
1608 | if (info_buf_source == NULL) { | |
1609 | rc = -ENOMEM; | |
1610 | goto cifs_rename_exit; | |
1611 | } | |
1612 | ||
1613 | info_buf_target = info_buf_source + 1; | |
1614 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, | |
1615 | info_buf_source, | |
1616 | cifs_sb->local_nls, | |
1617 | cifs_sb->mnt_cifs_flags & | |
1618 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1619 | if (tmprc != 0) | |
1620 | goto unlink_target; | |
1621 | ||
1622 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, toName, | |
1623 | info_buf_target, | |
1624 | cifs_sb->local_nls, | |
1625 | cifs_sb->mnt_cifs_flags & | |
1626 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1627 | ||
1628 | if (tmprc == 0 && (info_buf_source->UniqueId == | |
1629 | info_buf_target->UniqueId)) { | |
1630 | /* same file, POSIX says that this is a noop */ | |
1631 | rc = 0; | |
1632 | goto cifs_rename_exit; | |
1633 | } | |
1634 | } /* else ... BB we could add the same check for Windows by | |
1635 | checking the UniqueId via FILE_INTERNAL_INFO */ | |
1636 | ||
1637 | unlink_target: | |
1638 | /* Try unlinking the target dentry if it's not negative */ | |
1639 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
1640 | tmprc = cifs_unlink(target_dir, target_dentry); | |
1641 | if (tmprc) | |
1642 | goto cifs_rename_exit; | |
1643 | ||
1644 | rc = cifs_do_rename(xid, source_dentry, fromName, | |
1645 | target_dentry, toName); | |
1646 | } | |
1647 | ||
1648 | cifs_rename_exit: | |
1649 | kfree(info_buf_source); | |
1650 | kfree(fromName); | |
1651 | kfree(toName); | |
1652 | free_xid(xid); | |
1653 | cifs_put_tlink(tlink); | |
1654 | return rc; | |
1655 | } | |
1656 | ||
1657 | static bool | |
1658 | cifs_inode_needs_reval(struct inode *inode) | |
1659 | { | |
1660 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
1661 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1662 | ||
1663 | if (cifs_i->clientCanCacheRead) | |
1664 | return false; | |
1665 | ||
1666 | if (!lookupCacheEnabled) | |
1667 | return true; | |
1668 | ||
1669 | if (cifs_i->time == 0) | |
1670 | return true; | |
1671 | ||
1672 | if (!time_in_range(jiffies, cifs_i->time, | |
1673 | cifs_i->time + cifs_sb->actimeo)) | |
1674 | return true; | |
1675 | ||
1676 | /* hardlinked files w/ noserverino get "special" treatment */ | |
1677 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && | |
1678 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) | |
1679 | return true; | |
1680 | ||
1681 | return false; | |
1682 | } | |
1683 | ||
1684 | /* | |
1685 | * Zap the cache. Called when invalid_mapping flag is set. | |
1686 | */ | |
1687 | int | |
1688 | cifs_invalidate_mapping(struct inode *inode) | |
1689 | { | |
1690 | int rc = 0; | |
1691 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
1692 | ||
1693 | cifs_i->invalid_mapping = false; | |
1694 | ||
1695 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
1696 | rc = invalidate_inode_pages2(inode->i_mapping); | |
1697 | if (rc) { | |
1698 | cERROR(1, "%s: could not invalidate inode %p", __func__, | |
1699 | inode); | |
1700 | cifs_i->invalid_mapping = true; | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | cifs_fscache_reset_inode_cookie(inode); | |
1705 | return rc; | |
1706 | } | |
1707 | ||
1708 | int cifs_revalidate_file_attr(struct file *filp) | |
1709 | { | |
1710 | int rc = 0; | |
1711 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1712 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; | |
1713 | ||
1714 | if (!cifs_inode_needs_reval(inode)) | |
1715 | return rc; | |
1716 | ||
1717 | if (tlink_tcon(cfile->tlink)->unix_ext) | |
1718 | rc = cifs_get_file_info_unix(filp); | |
1719 | else | |
1720 | rc = cifs_get_file_info(filp); | |
1721 | ||
1722 | return rc; | |
1723 | } | |
1724 | ||
1725 | int cifs_revalidate_dentry_attr(struct dentry *dentry) | |
1726 | { | |
1727 | unsigned int xid; | |
1728 | int rc = 0; | |
1729 | struct inode *inode = dentry->d_inode; | |
1730 | struct super_block *sb = dentry->d_sb; | |
1731 | char *full_path = NULL; | |
1732 | ||
1733 | if (inode == NULL) | |
1734 | return -ENOENT; | |
1735 | ||
1736 | if (!cifs_inode_needs_reval(inode)) | |
1737 | return rc; | |
1738 | ||
1739 | xid = get_xid(); | |
1740 | ||
1741 | /* can not safely grab the rename sem here if rename calls revalidate | |
1742 | since that would deadlock */ | |
1743 | full_path = build_path_from_dentry(dentry); | |
1744 | if (full_path == NULL) { | |
1745 | rc = -ENOMEM; | |
1746 | goto out; | |
1747 | } | |
1748 | ||
1749 | cFYI(1, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time " | |
1750 | "%ld jiffies %ld", full_path, inode, inode->i_count.counter, | |
1751 | dentry, dentry->d_time, jiffies); | |
1752 | ||
1753 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) | |
1754 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); | |
1755 | else | |
1756 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
1757 | xid, NULL); | |
1758 | ||
1759 | out: | |
1760 | kfree(full_path); | |
1761 | free_xid(xid); | |
1762 | return rc; | |
1763 | } | |
1764 | ||
1765 | int cifs_revalidate_file(struct file *filp) | |
1766 | { | |
1767 | int rc; | |
1768 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1769 | ||
1770 | rc = cifs_revalidate_file_attr(filp); | |
1771 | if (rc) | |
1772 | return rc; | |
1773 | ||
1774 | if (CIFS_I(inode)->invalid_mapping) | |
1775 | rc = cifs_invalidate_mapping(inode); | |
1776 | return rc; | |
1777 | } | |
1778 | ||
1779 | /* revalidate a dentry's inode attributes */ | |
1780 | int cifs_revalidate_dentry(struct dentry *dentry) | |
1781 | { | |
1782 | int rc; | |
1783 | struct inode *inode = dentry->d_inode; | |
1784 | ||
1785 | rc = cifs_revalidate_dentry_attr(dentry); | |
1786 | if (rc) | |
1787 | return rc; | |
1788 | ||
1789 | if (CIFS_I(inode)->invalid_mapping) | |
1790 | rc = cifs_invalidate_mapping(inode); | |
1791 | return rc; | |
1792 | } | |
1793 | ||
1794 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1795 | struct kstat *stat) | |
1796 | { | |
1797 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); | |
1798 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
1799 | struct inode *inode = dentry->d_inode; | |
1800 | int rc; | |
1801 | ||
1802 | /* | |
1803 | * We need to be sure that all dirty pages are written and the server | |
1804 | * has actual ctime, mtime and file length. | |
1805 | */ | |
1806 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
1807 | inode->i_mapping->nrpages != 0) { | |
1808 | rc = filemap_fdatawait(inode->i_mapping); | |
1809 | if (rc) { | |
1810 | mapping_set_error(inode->i_mapping, rc); | |
1811 | return rc; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | rc = cifs_revalidate_dentry_attr(dentry); | |
1816 | if (rc) | |
1817 | return rc; | |
1818 | ||
1819 | generic_fillattr(inode, stat); | |
1820 | stat->blksize = CIFS_MAX_MSGSIZE; | |
1821 | stat->ino = CIFS_I(inode)->uniqueid; | |
1822 | ||
1823 | /* | |
1824 | * If on a multiuser mount without unix extensions, and the admin hasn't | |
1825 | * overridden them, set the ownership to the fsuid/fsgid of the current | |
1826 | * process. | |
1827 | */ | |
1828 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
1829 | !tcon->unix_ext) { | |
1830 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
1831 | stat->uid = current_fsuid(); | |
1832 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
1833 | stat->gid = current_fsgid(); | |
1834 | } | |
1835 | return rc; | |
1836 | } | |
1837 | ||
1838 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1839 | { | |
1840 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1841 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1842 | struct page *page; | |
1843 | int rc = 0; | |
1844 | ||
1845 | page = grab_cache_page(mapping, index); | |
1846 | if (!page) | |
1847 | return -ENOMEM; | |
1848 | ||
1849 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
1850 | unlock_page(page); | |
1851 | page_cache_release(page); | |
1852 | return rc; | |
1853 | } | |
1854 | ||
1855 | static void cifs_setsize(struct inode *inode, loff_t offset) | |
1856 | { | |
1857 | loff_t oldsize; | |
1858 | ||
1859 | spin_lock(&inode->i_lock); | |
1860 | oldsize = inode->i_size; | |
1861 | i_size_write(inode, offset); | |
1862 | spin_unlock(&inode->i_lock); | |
1863 | ||
1864 | truncate_pagecache(inode, oldsize, offset); | |
1865 | } | |
1866 | ||
1867 | static int | |
1868 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1869 | unsigned int xid, char *full_path) | |
1870 | { | |
1871 | int rc; | |
1872 | struct cifsFileInfo *open_file; | |
1873 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1874 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1875 | struct tcon_link *tlink = NULL; | |
1876 | struct cifs_tcon *pTcon = NULL; | |
1877 | struct cifs_io_parms io_parms; | |
1878 | ||
1879 | /* | |
1880 | * To avoid spurious oplock breaks from server, in the case of | |
1881 | * inodes that we already have open, avoid doing path based | |
1882 | * setting of file size if we can do it by handle. | |
1883 | * This keeps our caching token (oplock) and avoids timeouts | |
1884 | * when the local oplock break takes longer to flush | |
1885 | * writebehind data than the SMB timeout for the SetPathInfo | |
1886 | * request would allow | |
1887 | */ | |
1888 | open_file = find_writable_file(cifsInode, true); | |
1889 | if (open_file) { | |
1890 | __u16 nfid = open_file->fid.netfid; | |
1891 | __u32 npid = open_file->pid; | |
1892 | pTcon = tlink_tcon(open_file->tlink); | |
1893 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1894 | npid, false); | |
1895 | cifsFileInfo_put(open_file); | |
1896 | cFYI(1, "SetFSize for attrs rc = %d", rc); | |
1897 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1898 | unsigned int bytes_written; | |
1899 | ||
1900 | io_parms.netfid = nfid; | |
1901 | io_parms.pid = npid; | |
1902 | io_parms.tcon = pTcon; | |
1903 | io_parms.offset = 0; | |
1904 | io_parms.length = attrs->ia_size; | |
1905 | rc = CIFSSMBWrite(xid, &io_parms, &bytes_written, | |
1906 | NULL, NULL, 1); | |
1907 | cFYI(1, "Wrt seteof rc %d", rc); | |
1908 | } | |
1909 | } else | |
1910 | rc = -EINVAL; | |
1911 | ||
1912 | if (rc != 0) { | |
1913 | if (pTcon == NULL) { | |
1914 | tlink = cifs_sb_tlink(cifs_sb); | |
1915 | if (IS_ERR(tlink)) | |
1916 | return PTR_ERR(tlink); | |
1917 | pTcon = tlink_tcon(tlink); | |
1918 | } | |
1919 | ||
1920 | /* Set file size by pathname rather than by handle | |
1921 | either because no valid, writeable file handle for | |
1922 | it was found or because there was an error setting | |
1923 | it by handle */ | |
1924 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1925 | false, cifs_sb->local_nls, | |
1926 | cifs_sb->mnt_cifs_flags & | |
1927 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1928 | cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); | |
1929 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { | |
1930 | __u16 netfid; | |
1931 | int oplock = 0; | |
1932 | ||
1933 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1934 | FILE_OPEN, GENERIC_WRITE, | |
1935 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1936 | cifs_sb->local_nls, | |
1937 | cifs_sb->mnt_cifs_flags & | |
1938 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1939 | if (rc == 0) { | |
1940 | unsigned int bytes_written; | |
1941 | ||
1942 | io_parms.netfid = netfid; | |
1943 | io_parms.pid = current->tgid; | |
1944 | io_parms.tcon = pTcon; | |
1945 | io_parms.offset = 0; | |
1946 | io_parms.length = attrs->ia_size; | |
1947 | rc = CIFSSMBWrite(xid, &io_parms, | |
1948 | &bytes_written, | |
1949 | NULL, NULL, 1); | |
1950 | cFYI(1, "wrt seteof rc %d", rc); | |
1951 | CIFSSMBClose(xid, pTcon, netfid); | |
1952 | } | |
1953 | } | |
1954 | if (tlink) | |
1955 | cifs_put_tlink(tlink); | |
1956 | } | |
1957 | ||
1958 | if (rc == 0) { | |
1959 | cifsInode->server_eof = attrs->ia_size; | |
1960 | cifs_setsize(inode, attrs->ia_size); | |
1961 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1962 | } | |
1963 | ||
1964 | return rc; | |
1965 | } | |
1966 | ||
1967 | static int | |
1968 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1969 | { | |
1970 | int rc; | |
1971 | unsigned int xid; | |
1972 | char *full_path = NULL; | |
1973 | struct inode *inode = direntry->d_inode; | |
1974 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1975 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1976 | struct tcon_link *tlink; | |
1977 | struct cifs_tcon *pTcon; | |
1978 | struct cifs_unix_set_info_args *args = NULL; | |
1979 | struct cifsFileInfo *open_file; | |
1980 | ||
1981 | cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x", | |
1982 | direntry->d_name.name, attrs->ia_valid); | |
1983 | ||
1984 | xid = get_xid(); | |
1985 | ||
1986 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
1987 | attrs->ia_valid |= ATTR_FORCE; | |
1988 | ||
1989 | rc = inode_change_ok(inode, attrs); | |
1990 | if (rc < 0) | |
1991 | goto out; | |
1992 | ||
1993 | full_path = build_path_from_dentry(direntry); | |
1994 | if (full_path == NULL) { | |
1995 | rc = -ENOMEM; | |
1996 | goto out; | |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * Attempt to flush data before changing attributes. We need to do | |
2001 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2002 | * ownership or mode then we may also need to do this. Here, we take | |
2003 | * the safe way out and just do the flush on all setattr requests. If | |
2004 | * the flush returns error, store it to report later and continue. | |
2005 | * | |
2006 | * BB: This should be smarter. Why bother flushing pages that | |
2007 | * will be truncated anyway? Also, should we error out here if | |
2008 | * the flush returns error? | |
2009 | */ | |
2010 | rc = filemap_write_and_wait(inode->i_mapping); | |
2011 | mapping_set_error(inode->i_mapping, rc); | |
2012 | rc = 0; | |
2013 | ||
2014 | if (attrs->ia_valid & ATTR_SIZE) { | |
2015 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2016 | if (rc != 0) | |
2017 | goto out; | |
2018 | } | |
2019 | ||
2020 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2021 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2022 | attrs->ia_valid &= ~ATTR_MODE; | |
2023 | ||
2024 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2025 | if (args == NULL) { | |
2026 | rc = -ENOMEM; | |
2027 | goto out; | |
2028 | } | |
2029 | ||
2030 | /* set up the struct */ | |
2031 | if (attrs->ia_valid & ATTR_MODE) | |
2032 | args->mode = attrs->ia_mode; | |
2033 | else | |
2034 | args->mode = NO_CHANGE_64; | |
2035 | ||
2036 | if (attrs->ia_valid & ATTR_UID) | |
2037 | args->uid = attrs->ia_uid; | |
2038 | else | |
2039 | args->uid = NO_CHANGE_64; | |
2040 | ||
2041 | if (attrs->ia_valid & ATTR_GID) | |
2042 | args->gid = attrs->ia_gid; | |
2043 | else | |
2044 | args->gid = NO_CHANGE_64; | |
2045 | ||
2046 | if (attrs->ia_valid & ATTR_ATIME) | |
2047 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
2048 | else | |
2049 | args->atime = NO_CHANGE_64; | |
2050 | ||
2051 | if (attrs->ia_valid & ATTR_MTIME) | |
2052 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
2053 | else | |
2054 | args->mtime = NO_CHANGE_64; | |
2055 | ||
2056 | if (attrs->ia_valid & ATTR_CTIME) | |
2057 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
2058 | else | |
2059 | args->ctime = NO_CHANGE_64; | |
2060 | ||
2061 | args->device = 0; | |
2062 | open_file = find_writable_file(cifsInode, true); | |
2063 | if (open_file) { | |
2064 | u16 nfid = open_file->fid.netfid; | |
2065 | u32 npid = open_file->pid; | |
2066 | pTcon = tlink_tcon(open_file->tlink); | |
2067 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); | |
2068 | cifsFileInfo_put(open_file); | |
2069 | } else { | |
2070 | tlink = cifs_sb_tlink(cifs_sb); | |
2071 | if (IS_ERR(tlink)) { | |
2072 | rc = PTR_ERR(tlink); | |
2073 | goto out; | |
2074 | } | |
2075 | pTcon = tlink_tcon(tlink); | |
2076 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, | |
2077 | cifs_sb->local_nls, | |
2078 | cifs_sb->mnt_cifs_flags & | |
2079 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2080 | cifs_put_tlink(tlink); | |
2081 | } | |
2082 | ||
2083 | if (rc) | |
2084 | goto out; | |
2085 | ||
2086 | if ((attrs->ia_valid & ATTR_SIZE) && | |
2087 | attrs->ia_size != i_size_read(inode)) | |
2088 | truncate_setsize(inode, attrs->ia_size); | |
2089 | ||
2090 | setattr_copy(inode, attrs); | |
2091 | mark_inode_dirty(inode); | |
2092 | ||
2093 | /* force revalidate when any of these times are set since some | |
2094 | of the fs types (eg ext3, fat) do not have fine enough | |
2095 | time granularity to match protocol, and we do not have a | |
2096 | a way (yet) to query the server fs's time granularity (and | |
2097 | whether it rounds times down). | |
2098 | */ | |
2099 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2100 | cifsInode->time = 0; | |
2101 | out: | |
2102 | kfree(args); | |
2103 | kfree(full_path); | |
2104 | free_xid(xid); | |
2105 | return rc; | |
2106 | } | |
2107 | ||
2108 | static int | |
2109 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
2110 | { | |
2111 | unsigned int xid; | |
2112 | uid_t uid = NO_CHANGE_32; | |
2113 | gid_t gid = NO_CHANGE_32; | |
2114 | struct inode *inode = direntry->d_inode; | |
2115 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2116 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2117 | char *full_path = NULL; | |
2118 | int rc = -EACCES; | |
2119 | __u32 dosattr = 0; | |
2120 | __u64 mode = NO_CHANGE_64; | |
2121 | ||
2122 | xid = get_xid(); | |
2123 | ||
2124 | cFYI(1, "setattr on file %s attrs->iavalid 0x%x", | |
2125 | direntry->d_name.name, attrs->ia_valid); | |
2126 | ||
2127 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
2128 | attrs->ia_valid |= ATTR_FORCE; | |
2129 | ||
2130 | rc = inode_change_ok(inode, attrs); | |
2131 | if (rc < 0) { | |
2132 | free_xid(xid); | |
2133 | return rc; | |
2134 | } | |
2135 | ||
2136 | full_path = build_path_from_dentry(direntry); | |
2137 | if (full_path == NULL) { | |
2138 | rc = -ENOMEM; | |
2139 | free_xid(xid); | |
2140 | return rc; | |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * Attempt to flush data before changing attributes. We need to do | |
2145 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2146 | * ownership or mode then we may also need to do this. Here, we take | |
2147 | * the safe way out and just do the flush on all setattr requests. If | |
2148 | * the flush returns error, store it to report later and continue. | |
2149 | * | |
2150 | * BB: This should be smarter. Why bother flushing pages that | |
2151 | * will be truncated anyway? Also, should we error out here if | |
2152 | * the flush returns error? | |
2153 | */ | |
2154 | rc = filemap_write_and_wait(inode->i_mapping); | |
2155 | mapping_set_error(inode->i_mapping, rc); | |
2156 | rc = 0; | |
2157 | ||
2158 | if (attrs->ia_valid & ATTR_SIZE) { | |
2159 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2160 | if (rc != 0) | |
2161 | goto cifs_setattr_exit; | |
2162 | } | |
2163 | ||
2164 | if (attrs->ia_valid & ATTR_UID) | |
2165 | uid = attrs->ia_uid; | |
2166 | ||
2167 | if (attrs->ia_valid & ATTR_GID) | |
2168 | gid = attrs->ia_gid; | |
2169 | ||
2170 | #ifdef CONFIG_CIFS_ACL | |
2171 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
2172 | if (uid != NO_CHANGE_32 || gid != NO_CHANGE_32) { | |
2173 | rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, | |
2174 | uid, gid); | |
2175 | if (rc) { | |
2176 | cFYI(1, "%s: Setting id failed with error: %d", | |
2177 | __func__, rc); | |
2178 | goto cifs_setattr_exit; | |
2179 | } | |
2180 | } | |
2181 | } else | |
2182 | #endif /* CONFIG_CIFS_ACL */ | |
2183 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) | |
2184 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); | |
2185 | ||
2186 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2187 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2188 | attrs->ia_valid &= ~ATTR_MODE; | |
2189 | ||
2190 | if (attrs->ia_valid & ATTR_MODE) { | |
2191 | mode = attrs->ia_mode; | |
2192 | rc = 0; | |
2193 | #ifdef CONFIG_CIFS_ACL | |
2194 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
2195 | rc = id_mode_to_cifs_acl(inode, full_path, mode, | |
2196 | NO_CHANGE_32, NO_CHANGE_32); | |
2197 | if (rc) { | |
2198 | cFYI(1, "%s: Setting ACL failed with error: %d", | |
2199 | __func__, rc); | |
2200 | goto cifs_setattr_exit; | |
2201 | } | |
2202 | } else | |
2203 | #endif /* CONFIG_CIFS_ACL */ | |
2204 | if (((mode & S_IWUGO) == 0) && | |
2205 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
2206 | ||
2207 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2208 | ||
2209 | /* fix up mode if we're not using dynperm */ | |
2210 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2211 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2212 | } else if ((mode & S_IWUGO) && | |
2213 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
2214 | ||
2215 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2216 | /* Attributes of 0 are ignored */ | |
2217 | if (dosattr == 0) | |
2218 | dosattr |= ATTR_NORMAL; | |
2219 | ||
2220 | /* reset local inode permissions to normal */ | |
2221 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2222 | attrs->ia_mode &= ~(S_IALLUGO); | |
2223 | if (S_ISDIR(inode->i_mode)) | |
2224 | attrs->ia_mode |= | |
2225 | cifs_sb->mnt_dir_mode; | |
2226 | else | |
2227 | attrs->ia_mode |= | |
2228 | cifs_sb->mnt_file_mode; | |
2229 | } | |
2230 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2231 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2232 | attrs->ia_valid &= ~ATTR_MODE; | |
2233 | } | |
2234 | } | |
2235 | ||
2236 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || | |
2237 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2238 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2239 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
2240 | ||
2241 | /* Even if error on time set, no sense failing the call if | |
2242 | the server would set the time to a reasonable value anyway, | |
2243 | and this check ensures that we are not being called from | |
2244 | sys_utimes in which case we ought to fail the call back to | |
2245 | the user when the server rejects the call */ | |
2246 | if ((rc) && (attrs->ia_valid & | |
2247 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) | |
2248 | rc = 0; | |
2249 | } | |
2250 | ||
2251 | /* do not need local check to inode_check_ok since the server does | |
2252 | that */ | |
2253 | if (rc) | |
2254 | goto cifs_setattr_exit; | |
2255 | ||
2256 | if ((attrs->ia_valid & ATTR_SIZE) && | |
2257 | attrs->ia_size != i_size_read(inode)) | |
2258 | truncate_setsize(inode, attrs->ia_size); | |
2259 | ||
2260 | setattr_copy(inode, attrs); | |
2261 | mark_inode_dirty(inode); | |
2262 | ||
2263 | cifs_setattr_exit: | |
2264 | kfree(full_path); | |
2265 | free_xid(xid); | |
2266 | return rc; | |
2267 | } | |
2268 | ||
2269 | int | |
2270 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2271 | { | |
2272 | struct inode *inode = direntry->d_inode; | |
2273 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2274 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); | |
2275 | ||
2276 | if (pTcon->unix_ext) | |
2277 | return cifs_setattr_unix(direntry, attrs); | |
2278 | ||
2279 | return cifs_setattr_nounix(direntry, attrs); | |
2280 | ||
2281 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2282 | } | |
2283 | ||
2284 | #if 0 | |
2285 | void cifs_delete_inode(struct inode *inode) | |
2286 | { | |
2287 | cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode); | |
2288 | /* may have to add back in if and when safe distributed caching of | |
2289 | directories added e.g. via FindNotify */ | |
2290 | } | |
2291 | #endif |