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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
8be0ed44 | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 | 22 | #include <linux/stat.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 LT |
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 | ||
70eff55d | 33 | |
7962670e | 34 | static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) |
70eff55d CH |
35 | { |
36 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
37 | ||
38 | switch (inode->i_mode & S_IFMT) { | |
39 | case S_IFREG: | |
40 | inode->i_op = &cifs_file_inode_ops; | |
41 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
42 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
43 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
44 | else | |
45 | inode->i_fop = &cifs_file_direct_ops; | |
46 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
47 | inode->i_fop = &cifs_file_nobrl_ops; | |
48 | else { /* not direct, send byte range locks */ | |
49 | inode->i_fop = &cifs_file_ops; | |
50 | } | |
51 | ||
52 | ||
53 | /* check if server can support readpages */ | |
54 | if (cifs_sb->tcon->ses->server->maxBuf < | |
55 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) | |
56 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
57 | else | |
58 | inode->i_data.a_ops = &cifs_addr_ops; | |
59 | break; | |
60 | case S_IFDIR: | |
bc5b6e24 | 61 | #ifdef CONFIG_CIFS_DFS_UPCALL |
7962670e IM |
62 | if (is_dfs_referral) { |
63 | inode->i_op = &cifs_dfs_referral_inode_operations; | |
64 | } else { | |
bc5b6e24 SF |
65 | #else /* NO DFS support, treat as a directory */ |
66 | { | |
67 | #endif | |
7962670e IM |
68 | inode->i_op = &cifs_dir_inode_ops; |
69 | inode->i_fop = &cifs_dir_ops; | |
70 | } | |
70eff55d CH |
71 | break; |
72 | case S_IFLNK: | |
73 | inode->i_op = &cifs_symlink_inode_ops; | |
74 | break; | |
75 | default: | |
76 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
77 | break; | |
78 | } | |
79 | } | |
80 | ||
df2cf170 JL |
81 | /* check inode attributes against fattr. If they don't match, tag the |
82 | * inode for cache invalidation | |
83 | */ | |
84 | static void | |
85 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
86 | { | |
87 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
88 | ||
89 | cFYI(1, ("%s: revalidating inode %llu", __func__, cifs_i->uniqueid)); | |
90 | ||
91 | if (inode->i_state & I_NEW) { | |
92 | cFYI(1, ("%s: inode %llu is new", __func__, cifs_i->uniqueid)); | |
93 | return; | |
94 | } | |
95 | ||
96 | /* don't bother with revalidation if we have an oplock */ | |
97 | if (cifs_i->clientCanCacheRead) { | |
98 | cFYI(1, ("%s: inode %llu is oplocked", __func__, | |
99 | cifs_i->uniqueid)); | |
100 | return; | |
101 | } | |
102 | ||
103 | /* revalidate if mtime or size have changed */ | |
104 | if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) && | |
105 | cifs_i->server_eof == fattr->cf_eof) { | |
106 | cFYI(1, ("%s: inode %llu is unchanged", __func__, | |
107 | cifs_i->uniqueid)); | |
108 | return; | |
109 | } | |
110 | ||
111 | cFYI(1, ("%s: invalidating inode %llu mapping", __func__, | |
112 | cifs_i->uniqueid)); | |
113 | cifs_i->invalid_mapping = true; | |
114 | } | |
115 | ||
cc0bad75 JL |
116 | /* populate an inode with info from a cifs_fattr struct */ |
117 | void | |
118 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 119 | { |
cc0bad75 | 120 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 JL |
121 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
122 | unsigned long oldtime = cifs_i->time; | |
cc0bad75 | 123 | |
df2cf170 JL |
124 | cifs_revalidate_cache(inode, fattr); |
125 | ||
cc0bad75 JL |
126 | inode->i_atime = fattr->cf_atime; |
127 | inode->i_mtime = fattr->cf_mtime; | |
128 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 JL |
129 | inode->i_rdev = fattr->cf_rdev; |
130 | inode->i_nlink = fattr->cf_nlink; | |
131 | inode->i_uid = fattr->cf_uid; | |
132 | inode->i_gid = fattr->cf_gid; | |
133 | ||
0b8f18e3 JL |
134 | /* if dynperm is set, don't clobber existing mode */ |
135 | if (inode->i_state & I_NEW || | |
136 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
137 | inode->i_mode = fattr->cf_mode; | |
138 | ||
cc0bad75 JL |
139 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
140 | cifs_i->uniqueid = fattr->cf_uniqueid; | |
75f12983 | 141 | |
0b8f18e3 JL |
142 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
143 | cifs_i->time = 0; | |
144 | else | |
145 | cifs_i->time = jiffies; | |
146 | ||
b6b38f70 JP |
147 | cFYI(1, "inode 0x%p old_time=%ld new_time=%ld", inode, |
148 | oldtime, cifs_i->time); | |
0b8f18e3 JL |
149 | |
150 | cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING; | |
cc0bad75 | 151 | |
835a36ca | 152 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
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 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ | |
174 | void | |
175 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
176 | struct cifs_sb_info *cifs_sb) | |
177 | { | |
178 | memset(fattr, 0, sizeof(*fattr)); | |
179 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
180 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
181 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
182 | ||
183 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
184 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
185 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
186 | fattr->cf_mode = le64_to_cpu(info->Permissions); | |
75f12983 CH |
187 | |
188 | /* | |
189 | * Since we set the inode type below we need to mask off | |
190 | * to avoid strange results if bits set above. | |
191 | */ | |
cc0bad75 | 192 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
193 | switch (le32_to_cpu(info->Type)) { |
194 | case UNIX_FILE: | |
cc0bad75 JL |
195 | fattr->cf_mode |= S_IFREG; |
196 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
197 | break; |
198 | case UNIX_SYMLINK: | |
cc0bad75 JL |
199 | fattr->cf_mode |= S_IFLNK; |
200 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
201 | break; |
202 | case UNIX_DIR: | |
cc0bad75 JL |
203 | fattr->cf_mode |= S_IFDIR; |
204 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
205 | break; |
206 | case UNIX_CHARDEV: | |
cc0bad75 JL |
207 | fattr->cf_mode |= S_IFCHR; |
208 | fattr->cf_dtype = DT_CHR; | |
209 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
210 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
211 | break; |
212 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
213 | fattr->cf_mode |= S_IFBLK; |
214 | fattr->cf_dtype = DT_BLK; | |
215 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
216 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
217 | break; |
218 | case UNIX_FIFO: | |
cc0bad75 JL |
219 | fattr->cf_mode |= S_IFIFO; |
220 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
221 | break; |
222 | case UNIX_SOCKET: | |
cc0bad75 JL |
223 | fattr->cf_mode |= S_IFSOCK; |
224 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
225 | break; |
226 | default: | |
227 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
228 | fattr->cf_mode |= S_IFREG; |
229 | fattr->cf_dtype = DT_REG; | |
b6b38f70 | 230 | cFYI(1, "unknown type %d", le32_to_cpu(info->Type)); |
75f12983 CH |
231 | break; |
232 | } | |
233 | ||
cc0bad75 JL |
234 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
235 | fattr->cf_uid = cifs_sb->mnt_uid; | |
75f12983 | 236 | else |
cc0bad75 | 237 | fattr->cf_uid = le64_to_cpu(info->Uid); |
75f12983 | 238 | |
cc0bad75 JL |
239 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
240 | fattr->cf_gid = cifs_sb->mnt_gid; | |
75f12983 | 241 | else |
cc0bad75 | 242 | fattr->cf_gid = le64_to_cpu(info->Gid); |
75f12983 | 243 | |
cc0bad75 | 244 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
245 | } |
246 | ||
b9a3260f | 247 | /* |
cc0bad75 JL |
248 | * Fill a cifs_fattr struct with fake inode info. |
249 | * | |
250 | * Needed to setup cifs_fattr data for the directory which is the | |
251 | * junction to the new submount (ie to setup the fake directory | |
252 | * which represents a DFS referral). | |
b9a3260f | 253 | */ |
f1230c97 | 254 | static void |
cc0bad75 | 255 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 256 | { |
cc0bad75 | 257 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 258 | |
b6b38f70 | 259 | cFYI(1, "creating fake fattr for DFS referral"); |
cc0bad75 JL |
260 | |
261 | memset(fattr, 0, sizeof(*fattr)); | |
262 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
263 | fattr->cf_uid = cifs_sb->mnt_uid; | |
264 | fattr->cf_gid = cifs_sb->mnt_gid; | |
265 | fattr->cf_atime = CURRENT_TIME; | |
266 | fattr->cf_ctime = CURRENT_TIME; | |
267 | fattr->cf_mtime = CURRENT_TIME; | |
268 | fattr->cf_nlink = 2; | |
269 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
0e4bbde9 SF |
270 | } |
271 | ||
abab095d JL |
272 | int cifs_get_file_info_unix(struct file *filp) |
273 | { | |
274 | int rc; | |
275 | int xid; | |
276 | FILE_UNIX_BASIC_INFO find_data; | |
277 | struct cifs_fattr fattr; | |
278 | struct inode *inode = filp->f_path.dentry->d_inode; | |
279 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
280 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
281 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; | |
282 | ||
283 | xid = GetXid(); | |
284 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->netfid, &find_data); | |
285 | if (!rc) { | |
286 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
287 | } else if (rc == -EREMOTE) { | |
288 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
289 | rc = 0; | |
290 | } | |
291 | ||
292 | cifs_fattr_to_inode(inode, &fattr); | |
293 | FreeXid(xid); | |
294 | return rc; | |
295 | } | |
296 | ||
1da177e4 | 297 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 JL |
298 | const unsigned char *full_path, |
299 | struct super_block *sb, int xid) | |
1da177e4 | 300 | { |
cc0bad75 | 301 | int rc; |
0e4bbde9 | 302 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 JL |
303 | struct cifs_fattr fattr; |
304 | struct cifsTconInfo *tcon; | |
1da177e4 | 305 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 306 | |
cc0bad75 | 307 | tcon = cifs_sb->tcon; |
b6b38f70 | 308 | cFYI(1, "Getting info on %s", full_path); |
7962670e | 309 | |
1da177e4 | 310 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 311 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
737b758c SF |
312 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
313 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
e911d0cc | 314 | |
cc0bad75 JL |
315 | if (!rc) { |
316 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
317 | } else if (rc == -EREMOTE) { | |
318 | cifs_create_dfs_fattr(&fattr, sb); | |
319 | rc = 0; | |
320 | } else { | |
321 | return rc; | |
322 | } | |
1da177e4 | 323 | |
0e4bbde9 | 324 | if (*pinode == NULL) { |
cc0bad75 JL |
325 | /* get new inode */ |
326 | *pinode = cifs_iget(sb, &fattr); | |
327 | if (!*pinode) | |
0e4bbde9 | 328 | rc = -ENOMEM; |
cc0bad75 JL |
329 | } else { |
330 | /* we already have inode, update it */ | |
331 | cifs_fattr_to_inode(*pinode, &fattr); | |
0e4bbde9 | 332 | } |
1da177e4 | 333 | |
1da177e4 LT |
334 | return rc; |
335 | } | |
336 | ||
0b8f18e3 JL |
337 | static int |
338 | cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, | |
339 | struct cifs_sb_info *cifs_sb, int xid) | |
d6e2f2a4 SF |
340 | { |
341 | int rc; | |
4b18f2a9 | 342 | int oplock = 0; |
d6e2f2a4 SF |
343 | __u16 netfid; |
344 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
86c96b4b | 345 | char buf[24]; |
d6e2f2a4 | 346 | unsigned int bytes_read; |
fb8c4b14 | 347 | char *pbuf; |
d6e2f2a4 SF |
348 | |
349 | pbuf = buf; | |
350 | ||
0b8f18e3 JL |
351 | fattr->cf_mode &= ~S_IFMT; |
352 | ||
353 | if (fattr->cf_eof == 0) { | |
354 | fattr->cf_mode |= S_IFIFO; | |
355 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 356 | return 0; |
0b8f18e3 JL |
357 | } else if (fattr->cf_eof < 8) { |
358 | fattr->cf_mode |= S_IFREG; | |
359 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
360 | return -EINVAL; /* EOPNOTSUPP? */ |
361 | } | |
50c2f753 | 362 | |
d6e2f2a4 SF |
363 | rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, |
364 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
365 | cifs_sb->local_nls, | |
366 | cifs_sb->mnt_cifs_flags & | |
367 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
fb8c4b14 | 368 | if (rc == 0) { |
ec637e3f | 369 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 | 370 | /* Read header */ |
0b8f18e3 | 371 | rc = CIFSSMBRead(xid, pTcon, netfid, |
86c96b4b | 372 | 24 /* length */, 0 /* offset */, |
ec637e3f | 373 | &bytes_read, &pbuf, &buf_type); |
4523cc30 SF |
374 | if ((rc == 0) && (bytes_read >= 8)) { |
375 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
b6b38f70 | 376 | cFYI(1, "Block device"); |
0b8f18e3 JL |
377 | fattr->cf_mode |= S_IFBLK; |
378 | fattr->cf_dtype = DT_BLK; | |
4523cc30 | 379 | if (bytes_read == 24) { |
86c96b4b SF |
380 | /* we have enough to decode dev num */ |
381 | __u64 mjr; /* major */ | |
382 | __u64 mnr; /* minor */ | |
383 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
384 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 385 | fattr->cf_rdev = MKDEV(mjr, mnr); |
86c96b4b | 386 | } |
4523cc30 | 387 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
b6b38f70 | 388 | cFYI(1, "Char device"); |
0b8f18e3 JL |
389 | fattr->cf_mode |= S_IFCHR; |
390 | fattr->cf_dtype = DT_CHR; | |
4523cc30 | 391 | if (bytes_read == 24) { |
86c96b4b SF |
392 | /* we have enough to decode dev num */ |
393 | __u64 mjr; /* major */ | |
394 | __u64 mnr; /* minor */ | |
395 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
396 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
0b8f18e3 | 397 | fattr->cf_rdev = MKDEV(mjr, mnr); |
fb8c4b14 | 398 | } |
4523cc30 | 399 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { |
b6b38f70 | 400 | cFYI(1, "Symlink"); |
0b8f18e3 JL |
401 | fattr->cf_mode |= S_IFLNK; |
402 | fattr->cf_dtype = DT_LNK; | |
86c96b4b | 403 | } else { |
0b8f18e3 JL |
404 | fattr->cf_mode |= S_IFREG; /* file? */ |
405 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 | 406 | rc = -EOPNOTSUPP; |
86c96b4b | 407 | } |
3020a1f5 | 408 | } else { |
0b8f18e3 JL |
409 | fattr->cf_mode |= S_IFREG; /* then it is a file */ |
410 | fattr->cf_dtype = DT_REG; | |
fb8c4b14 SF |
411 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ |
412 | } | |
d6e2f2a4 | 413 | CIFSSMBClose(xid, pTcon, netfid); |
d6e2f2a4 SF |
414 | } |
415 | return rc; | |
d6e2f2a4 SF |
416 | } |
417 | ||
9e294f1c SF |
418 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
419 | ||
0b8f18e3 JL |
420 | /* |
421 | * Fetch mode bits as provided by SFU. | |
422 | * | |
423 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
424 | */ | |
425 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
426 | struct cifs_sb_info *cifs_sb, int xid) | |
9e294f1c | 427 | { |
3020a1f5 | 428 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
429 | ssize_t rc; |
430 | char ea_value[4]; | |
431 | __u32 mode; | |
432 | ||
31c0519f | 433 | rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS", |
0b8f18e3 JL |
434 | ea_value, 4 /* size of buf */, cifs_sb->local_nls, |
435 | cifs_sb->mnt_cifs_flags & | |
436 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4523cc30 | 437 | if (rc < 0) |
9e294f1c SF |
438 | return (int)rc; |
439 | else if (rc > 3) { | |
440 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 441 | fattr->cf_mode &= ~SFBITS_MASK; |
b6b38f70 JP |
442 | cFYI(1, "special bits 0%o org mode 0%o", mode, |
443 | fattr->cf_mode); | |
0b8f18e3 | 444 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
b6b38f70 | 445 | cFYI(1, "special mode bits 0%o", mode); |
9e294f1c | 446 | } |
0b8f18e3 JL |
447 | |
448 | return 0; | |
3020a1f5 SF |
449 | #else |
450 | return -EOPNOTSUPP; | |
451 | #endif | |
9e294f1c SF |
452 | } |
453 | ||
0b8f18e3 | 454 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 455 | static void |
0b8f18e3 JL |
456 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
457 | struct cifs_sb_info *cifs_sb, bool adjust_tz) | |
b9a3260f | 458 | { |
0b8f18e3 JL |
459 | memset(fattr, 0, sizeof(*fattr)); |
460 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
461 | if (info->DeletePending) | |
462 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
463 | ||
464 | if (info->LastAccessTime) | |
465 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
466 | else | |
467 | fattr->cf_atime = CURRENT_TIME; | |
468 | ||
469 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
470 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
471 | ||
472 | if (adjust_tz) { | |
473 | fattr->cf_ctime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
474 | fattr->cf_mtime.tv_sec += cifs_sb->tcon->ses->server->timeAdj; | |
475 | } | |
476 | ||
477 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
478 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
479 | ||
480 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
481 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; | |
482 | fattr->cf_dtype = DT_DIR; | |
483 | } else { | |
484 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
485 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 486 | |
d0c280d2 JL |
487 | /* clear write bits if ATTR_READONLY is set */ |
488 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
489 | fattr->cf_mode &= ~(S_IWUGO); | |
490 | } | |
0b8f18e3 JL |
491 | |
492 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); | |
493 | ||
494 | fattr->cf_uid = cifs_sb->mnt_uid; | |
495 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
496 | } |
497 | ||
abab095d JL |
498 | int cifs_get_file_info(struct file *filp) |
499 | { | |
500 | int rc; | |
501 | int xid; | |
502 | FILE_ALL_INFO find_data; | |
503 | struct cifs_fattr fattr; | |
504 | struct inode *inode = filp->f_path.dentry->d_inode; | |
505 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
506 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
507 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; | |
508 | ||
509 | xid = GetXid(); | |
510 | rc = CIFSSMBQFileInfo(xid, tcon, cfile->netfid, &find_data); | |
511 | if (rc == -EOPNOTSUPP || rc == -EINVAL) { | |
512 | /* | |
513 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
514 | * for now, just skip revalidating and mark inode for |
515 | * immediate reval. | |
516 | */ | |
abab095d JL |
517 | rc = 0; |
518 | CIFS_I(inode)->time = 0; | |
519 | goto cgfi_exit; | |
520 | } else if (rc == -EREMOTE) { | |
521 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
522 | rc = 0; | |
523 | } else if (rc) | |
524 | goto cgfi_exit; | |
525 | ||
526 | /* | |
527 | * don't bother with SFU junk here -- just mark inode as needing | |
528 | * revalidation. | |
529 | */ | |
530 | cifs_all_info_to_fattr(&fattr, &find_data, cifs_sb, false); | |
531 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; | |
532 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
533 | cifs_fattr_to_inode(inode, &fattr); | |
534 | cgfi_exit: | |
535 | FreeXid(xid); | |
536 | return rc; | |
537 | } | |
538 | ||
1da177e4 | 539 | int cifs_get_inode_info(struct inode **pinode, |
646dd539 | 540 | const unsigned char *full_path, FILE_ALL_INFO *pfindData, |
8b1327f6 | 541 | struct super_block *sb, int xid, const __u16 *pfid) |
1da177e4 | 542 | { |
0b8f18e3 | 543 | int rc = 0, tmprc; |
1da177e4 | 544 | struct cifsTconInfo *pTcon; |
1da177e4 | 545 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 546 | char *buf = NULL; |
5ade9dea | 547 | bool adjustTZ = false; |
0b8f18e3 | 548 | struct cifs_fattr fattr; |
1da177e4 LT |
549 | |
550 | pTcon = cifs_sb->tcon; | |
b6b38f70 | 551 | cFYI(1, "Getting info on %s", full_path); |
1da177e4 | 552 | |
d0d2f2df SF |
553 | if ((pfindData == NULL) && (*pinode != NULL)) { |
554 | if (CIFS_I(*pinode)->clientCanCacheRead) { | |
b6b38f70 | 555 | cFYI(1, "No need to revalidate cached inode sizes"); |
1da177e4 LT |
556 | return rc; |
557 | } | |
558 | } | |
559 | ||
560 | /* if file info not passed in then get it from server */ | |
d0d2f2df | 561 | if (pfindData == NULL) { |
1da177e4 | 562 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
d0d2f2df | 563 | if (buf == NULL) |
1da177e4 LT |
564 | return -ENOMEM; |
565 | pfindData = (FILE_ALL_INFO *)buf; | |
7962670e | 566 | |
1da177e4 | 567 | /* could do find first instead but this returns more info */ |
7962670e | 568 | rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData, |
acf1a1b1 | 569 | 0 /* not legacy */, |
6b8edfe0 | 570 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
737b758c | 571 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
6b8edfe0 SF |
572 | /* BB optimize code so we do not make the above call |
573 | when server claims no NT SMB support and the above call | |
574 | failed at least once - set flag in tcon or mount */ | |
4523cc30 | 575 | if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) { |
7962670e | 576 | rc = SMBQueryInformation(xid, pTcon, full_path, |
fb8c4b14 | 577 | pfindData, cifs_sb->local_nls, |
6b8edfe0 SF |
578 | cifs_sb->mnt_cifs_flags & |
579 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
4b18f2a9 | 580 | adjustTZ = true; |
6b8edfe0 | 581 | } |
1da177e4 | 582 | } |
0b8f18e3 JL |
583 | |
584 | if (!rc) { | |
585 | cifs_all_info_to_fattr(&fattr, (FILE_ALL_INFO *) pfindData, | |
586 | cifs_sb, adjustTZ); | |
587 | } else if (rc == -EREMOTE) { | |
588 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 589 | rc = 0; |
0b8f18e3 | 590 | } else { |
7962670e | 591 | goto cgii_exit; |
0b8f18e3 | 592 | } |
1da177e4 | 593 | |
0b8f18e3 JL |
594 | /* |
595 | * If an inode wasn't passed in, then get the inode number | |
596 | * | |
597 | * Is an i_ino of zero legal? Can we use that to check if the server | |
598 | * supports returning inode numbers? Are there other sanity checks we | |
599 | * can use to ensure that the server is really filling in that field? | |
600 | * | |
601 | * We can not use the IndexNumber field by default from Windows or | |
602 | * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA | |
603 | * CIFS spec claims that this value is unique within the scope of a | |
604 | * share, and the windows docs hint that it's actually unique | |
605 | * per-machine. | |
606 | * | |
607 | * There may be higher info levels that work but are there Windows | |
608 | * server or network appliances for which IndexNumber field is not | |
609 | * guaranteed unique? | |
610 | */ | |
b9a3260f | 611 | if (*pinode == NULL) { |
b9a3260f SF |
612 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
613 | int rc1 = 0; | |
b9a3260f SF |
614 | |
615 | rc1 = CIFSGetSrvInodeNumber(xid, pTcon, | |
0b8f18e3 | 616 | full_path, &fattr.cf_uniqueid, |
737b758c SF |
617 | cifs_sb->local_nls, |
618 | cifs_sb->mnt_cifs_flags & | |
619 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
ec06aedd | 620 | if (rc1 || !fattr.cf_uniqueid) { |
b6b38f70 | 621 | cFYI(1, "GetSrvInodeNum rc %d", rc1); |
0b8f18e3 | 622 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
ec06aedd | 623 | cifs_autodisable_serverino(cifs_sb); |
132ac7b7 | 624 | } |
132ac7b7 | 625 | } else { |
0b8f18e3 | 626 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
132ac7b7 | 627 | } |
b9a3260f | 628 | } else { |
0b8f18e3 | 629 | fattr.cf_uniqueid = CIFS_I(*pinode)->uniqueid; |
b9a3260f SF |
630 | } |
631 | ||
0b8f18e3 JL |
632 | /* query for SFU type info if supported and needed */ |
633 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
634 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
635 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
636 | if (tmprc) | |
b6b38f70 | 637 | cFYI(1, "cifs_sfu_type failed: %d", tmprc); |
b9a3260f | 638 | } |
1da177e4 | 639 | |
4879b448 | 640 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
b9a3260f SF |
641 | /* fill in 0777 bits from ACL */ |
642 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
b6b38f70 | 643 | cFYI(1, "Getting mode bits from ACL"); |
0b8f18e3 | 644 | cifs_acl_to_fattr(cifs_sb, &fattr, *pinode, full_path, pfid); |
b9a3260f | 645 | } |
4879b448 | 646 | #endif |
b9a3260f | 647 | |
0b8f18e3 JL |
648 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
649 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
650 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 651 | |
0b8f18e3 JL |
652 | if (!*pinode) { |
653 | *pinode = cifs_iget(sb, &fattr); | |
654 | if (!*pinode) | |
655 | rc = -ENOMEM; | |
656 | } else { | |
657 | cifs_fattr_to_inode(*pinode, &fattr); | |
658 | } | |
b9a3260f | 659 | |
7962670e | 660 | cgii_exit: |
1da177e4 LT |
661 | kfree(buf); |
662 | return rc; | |
663 | } | |
664 | ||
7f8ed420 SF |
665 | static const struct inode_operations cifs_ipc_inode_ops = { |
666 | .lookup = cifs_lookup, | |
667 | }; | |
668 | ||
e4cce94c | 669 | char *cifs_build_path_to_root(struct cifs_sb_info *cifs_sb) |
8be0ed44 SF |
670 | { |
671 | int pplen = cifs_sb->prepathlen; | |
672 | int dfsplen; | |
673 | char *full_path = NULL; | |
674 | ||
675 | /* if no prefix path, simply set path to the root of share to "" */ | |
676 | if (pplen == 0) { | |
677 | full_path = kmalloc(1, GFP_KERNEL); | |
678 | if (full_path) | |
679 | full_path[0] = 0; | |
680 | return full_path; | |
681 | } | |
682 | ||
683 | if (cifs_sb->tcon && (cifs_sb->tcon->Flags & SMB_SHARE_IS_IN_DFS)) | |
684 | dfsplen = strnlen(cifs_sb->tcon->treeName, MAX_TREE_SIZE + 1); | |
685 | else | |
686 | dfsplen = 0; | |
687 | ||
688 | full_path = kmalloc(dfsplen + pplen + 1, GFP_KERNEL); | |
689 | if (full_path == NULL) | |
690 | return full_path; | |
691 | ||
692 | if (dfsplen) { | |
693 | strncpy(full_path, cifs_sb->tcon->treeName, dfsplen); | |
694 | /* switch slash direction in prepath depending on whether | |
695 | * windows or posix style path names | |
696 | */ | |
697 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
698 | int i; | |
699 | for (i = 0; i < dfsplen; i++) { | |
700 | if (full_path[i] == '\\') | |
701 | full_path[i] = '/'; | |
702 | } | |
703 | } | |
704 | } | |
705 | strncpy(full_path + dfsplen, cifs_sb->prepath, pplen); | |
706 | full_path[dfsplen + pplen] = 0; /* add trailing null */ | |
707 | return full_path; | |
708 | } | |
709 | ||
cc0bad75 JL |
710 | static int |
711 | cifs_find_inode(struct inode *inode, void *opaque) | |
712 | { | |
713 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
714 | ||
715 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) | |
716 | return 0; | |
717 | ||
718 | return 1; | |
719 | } | |
720 | ||
721 | static int | |
722 | cifs_init_inode(struct inode *inode, void *opaque) | |
723 | { | |
724 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
725 | ||
726 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
727 | return 0; | |
728 | } | |
729 | ||
730 | /* Given fattrs, get a corresponding inode */ | |
731 | struct inode * | |
732 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
733 | { | |
734 | unsigned long hash; | |
735 | struct inode *inode; | |
736 | ||
b6b38f70 | 737 | cFYI(1, "looking for uniqueid=%llu", fattr->cf_uniqueid); |
cc0bad75 JL |
738 | |
739 | /* hash down to 32-bits on 32-bit arch */ | |
740 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
741 | ||
742 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
743 | ||
744 | /* we have fattrs in hand, update the inode */ | |
745 | if (inode) { | |
746 | cifs_fattr_to_inode(inode, fattr); | |
747 | if (sb->s_flags & MS_NOATIME) | |
748 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
749 | if (inode->i_state & I_NEW) { | |
750 | inode->i_ino = hash; | |
751 | unlock_new_inode(inode); | |
752 | } | |
753 | } | |
754 | ||
755 | return inode; | |
756 | } | |
757 | ||
1da177e4 | 758 | /* gets root inode */ |
bd433d4c | 759 | struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 760 | { |
ce634ab2 | 761 | int xid; |
1da177e4 | 762 | struct cifs_sb_info *cifs_sb; |
cc0bad75 | 763 | struct inode *inode = NULL; |
ce634ab2 | 764 | long rc; |
8be0ed44 | 765 | char *full_path; |
ce634ab2 | 766 | |
cc0bad75 | 767 | cifs_sb = CIFS_SB(sb); |
e4cce94c | 768 | full_path = cifs_build_path_to_root(cifs_sb); |
8be0ed44 SF |
769 | if (full_path == NULL) |
770 | return ERR_PTR(-ENOMEM); | |
c18c842b | 771 | |
8be0ed44 | 772 | xid = GetXid(); |
0b8f18e3 | 773 | if (cifs_sb->tcon->unix_ext) |
cc0bad75 | 774 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
0b8f18e3 JL |
775 | else |
776 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
8be0ed44 | 777 | xid, NULL); |
0b8f18e3 JL |
778 | |
779 | if (!inode) | |
780 | return ERR_PTR(-ENOMEM); | |
cc0bad75 | 781 | |
7f8ed420 | 782 | if (rc && cifs_sb->tcon->ipc) { |
b6b38f70 | 783 | cFYI(1, "ipc connection - fake read inode"); |
7f8ed420 SF |
784 | inode->i_mode |= S_IFDIR; |
785 | inode->i_nlink = 2; | |
786 | inode->i_op = &cifs_ipc_inode_ops; | |
787 | inode->i_fop = &simple_dir_operations; | |
788 | inode->i_uid = cifs_sb->mnt_uid; | |
789 | inode->i_gid = cifs_sb->mnt_gid; | |
ad661334 | 790 | } else if (rc) { |
8be0ed44 | 791 | kfree(full_path); |
ce634ab2 DH |
792 | _FreeXid(xid); |
793 | iget_failed(inode); | |
794 | return ERR_PTR(rc); | |
7f8ed420 SF |
795 | } |
796 | ||
ce634ab2 | 797 | |
8be0ed44 | 798 | kfree(full_path); |
ce634ab2 DH |
799 | /* can not call macro FreeXid here since in a void func |
800 | * TODO: This is no longer true | |
801 | */ | |
1da177e4 | 802 | _FreeXid(xid); |
ce634ab2 | 803 | return inode; |
1da177e4 LT |
804 | } |
805 | ||
388e57b2 SF |
806 | static int |
807 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, | |
808 | char *full_path, __u32 dosattr) | |
809 | { | |
810 | int rc; | |
811 | int oplock = 0; | |
812 | __u16 netfid; | |
813 | __u32 netpid; | |
814 | bool set_time = false; | |
815 | struct cifsFileInfo *open_file; | |
816 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
817 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
818 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
819 | FILE_BASIC_INFO info_buf; | |
820 | ||
1adcb710 SF |
821 | if (attrs == NULL) |
822 | return -EINVAL; | |
823 | ||
388e57b2 SF |
824 | if (attrs->ia_valid & ATTR_ATIME) { |
825 | set_time = true; | |
826 | info_buf.LastAccessTime = | |
827 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
828 | } else | |
829 | info_buf.LastAccessTime = 0; | |
830 | ||
831 | if (attrs->ia_valid & ATTR_MTIME) { | |
832 | set_time = true; | |
833 | info_buf.LastWriteTime = | |
834 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
835 | } else | |
836 | info_buf.LastWriteTime = 0; | |
837 | ||
838 | /* | |
839 | * Samba throws this field away, but windows may actually use it. | |
840 | * Do not set ctime unless other time stamps are changed explicitly | |
841 | * (i.e. by utimes()) since we would then have a mix of client and | |
842 | * server times. | |
843 | */ | |
844 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
b6b38f70 | 845 | cFYI(1, "CIFS - CTIME changed"); |
388e57b2 SF |
846 | info_buf.ChangeTime = |
847 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
848 | } else | |
849 | info_buf.ChangeTime = 0; | |
850 | ||
851 | info_buf.CreationTime = 0; /* don't change */ | |
852 | info_buf.Attributes = cpu_to_le32(dosattr); | |
853 | ||
854 | /* | |
855 | * If the file is already open for write, just use that fileid | |
856 | */ | |
857 | open_file = find_writable_file(cifsInode); | |
858 | if (open_file) { | |
859 | netfid = open_file->netfid; | |
860 | netpid = open_file->pid; | |
861 | goto set_via_filehandle; | |
862 | } | |
863 | ||
864 | /* | |
865 | * NT4 apparently returns success on this call, but it doesn't | |
866 | * really work. | |
867 | */ | |
868 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { | |
869 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, | |
870 | &info_buf, cifs_sb->local_nls, | |
871 | cifs_sb->mnt_cifs_flags & | |
872 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
873 | if (rc == 0) { |
874 | cifsInode->cifsAttrs = dosattr; | |
875 | goto out; | |
876 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) | |
388e57b2 SF |
877 | goto out; |
878 | } | |
879 | ||
b6b38f70 JP |
880 | cFYI(1, "calling SetFileInfo since SetPathInfo for " |
881 | "times not supported by this server"); | |
388e57b2 SF |
882 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
883 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, | |
884 | CREATE_NOT_DIR, &netfid, &oplock, | |
885 | NULL, cifs_sb->local_nls, | |
886 | cifs_sb->mnt_cifs_flags & | |
887 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
888 | ||
889 | if (rc != 0) { | |
890 | if (rc == -EIO) | |
891 | rc = -EINVAL; | |
892 | goto out; | |
893 | } | |
894 | ||
895 | netpid = current->tgid; | |
896 | ||
897 | set_via_filehandle: | |
898 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); | |
d388908e SF |
899 | if (!rc) |
900 | cifsInode->cifsAttrs = dosattr; | |
901 | ||
388e57b2 SF |
902 | if (open_file == NULL) |
903 | CIFSSMBClose(xid, pTcon, netfid); | |
904 | else | |
6ab409b5 | 905 | cifsFileInfo_put(open_file); |
388e57b2 SF |
906 | out: |
907 | return rc; | |
908 | } | |
909 | ||
a12a1ac7 JL |
910 | /* |
911 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit | |
912 | * and rename it to a random name that hopefully won't conflict with | |
913 | * anything else. | |
914 | */ | |
915 | static int | |
3270958b | 916 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
a12a1ac7 JL |
917 | { |
918 | int oplock = 0; | |
919 | int rc; | |
920 | __u16 netfid; | |
3270958b | 921 | struct inode *inode = dentry->d_inode; |
a12a1ac7 JL |
922 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
923 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
924 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
3270958b SF |
925 | __u32 dosattr, origattr; |
926 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 JL |
927 | |
928 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, | |
dd1db2de | 929 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
a12a1ac7 JL |
930 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
931 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
932 | if (rc != 0) | |
933 | goto out; | |
934 | ||
3270958b SF |
935 | origattr = cifsInode->cifsAttrs; |
936 | if (origattr == 0) | |
937 | origattr |= ATTR_NORMAL; | |
938 | ||
939 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
940 | if (dosattr == 0) |
941 | dosattr |= ATTR_NORMAL; | |
942 | dosattr |= ATTR_HIDDEN; | |
943 | ||
3270958b SF |
944 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
945 | if (dosattr != origattr) { | |
946 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
947 | if (info_buf == NULL) { | |
948 | rc = -ENOMEM; | |
949 | goto out_close; | |
950 | } | |
951 | info_buf->Attributes = cpu_to_le32(dosattr); | |
952 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
953 | current->tgid); | |
954 | /* although we would like to mark the file hidden | |
955 | if that fails we will still try to rename it */ | |
41346098 | 956 | if (rc != 0) |
3270958b SF |
957 | cifsInode->cifsAttrs = dosattr; |
958 | else | |
959 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 960 | } |
a12a1ac7 | 961 | |
dd1db2de JL |
962 | /* rename the file */ |
963 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, | |
a12a1ac7 JL |
964 | cifs_sb->mnt_cifs_flags & |
965 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3270958b SF |
966 | if (rc != 0) { |
967 | rc = -ETXTBSY; | |
968 | goto undo_setattr; | |
969 | } | |
6d22f098 | 970 | |
3270958b SF |
971 | /* try to set DELETE_ON_CLOSE */ |
972 | if (!cifsInode->delete_pending) { | |
973 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, | |
974 | current->tgid); | |
975 | /* | |
976 | * some samba versions return -ENOENT when we try to set the | |
977 | * file disposition here. Likely a samba bug, but work around | |
978 | * it for now. This means that some cifsXXX files may hang | |
979 | * around after they shouldn't. | |
980 | * | |
981 | * BB: remove this hack after more servers have the fix | |
982 | */ | |
983 | if (rc == -ENOENT) | |
984 | rc = 0; | |
985 | else if (rc != 0) { | |
986 | rc = -ETXTBSY; | |
987 | goto undo_rename; | |
988 | } | |
989 | cifsInode->delete_pending = true; | |
990 | } | |
7ce86d5a | 991 | |
a12a1ac7 JL |
992 | out_close: |
993 | CIFSSMBClose(xid, tcon, netfid); | |
994 | out: | |
3270958b | 995 | kfree(info_buf); |
a12a1ac7 | 996 | return rc; |
3270958b SF |
997 | |
998 | /* | |
999 | * reset everything back to the original state. Don't bother | |
1000 | * dealing with errors here since we can't do anything about | |
1001 | * them anyway. | |
1002 | */ | |
1003 | undo_rename: | |
1004 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, | |
1005 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1006 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1007 | undo_setattr: | |
1008 | if (dosattr != origattr) { | |
1009 | info_buf->Attributes = cpu_to_le32(origattr); | |
1010 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, | |
1011 | current->tgid)) | |
1012 | cifsInode->cifsAttrs = origattr; | |
1013 | } | |
1014 | ||
1015 | goto out_close; | |
a12a1ac7 JL |
1016 | } |
1017 | ||
ff694527 SF |
1018 | |
1019 | /* | |
1020 | * If dentry->d_inode is null (usually meaning the cached dentry | |
1021 | * is a negative dentry) then we would attempt a standard SMB delete, but | |
af901ca1 AGR |
1022 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1023 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
1024 | * unlink on negative dentries currently. |
1025 | */ | |
5f0319a7 | 1026 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1027 | { |
1028 | int rc = 0; | |
1029 | int xid; | |
1da177e4 | 1030 | char *full_path = NULL; |
5f0319a7 | 1031 | struct inode *inode = dentry->d_inode; |
ff694527 | 1032 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1033 | struct super_block *sb = dir->i_sb; |
1034 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1035 | struct cifsTconInfo *tcon = cifs_sb->tcon; | |
6050247d SF |
1036 | struct iattr *attrs = NULL; |
1037 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1038 | |
b6b38f70 | 1039 | cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); |
1da177e4 LT |
1040 | |
1041 | xid = GetXid(); | |
1042 | ||
5f0319a7 JL |
1043 | /* Unlink can be called from rename so we can not take the |
1044 | * sb->s_vfs_rename_mutex here */ | |
1045 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1046 | if (full_path == NULL) { |
0f3bc09e | 1047 | rc = -ENOMEM; |
1da177e4 | 1048 | FreeXid(xid); |
0f3bc09e | 1049 | return rc; |
1da177e4 | 1050 | } |
2d785a50 | 1051 | |
5f0319a7 | 1052 | if ((tcon->ses->capabilities & CAP_UNIX) && |
2d785a50 | 1053 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
5f0319a7 JL |
1054 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
1055 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, | |
2d785a50 | 1056 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
737b758c | 1057 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
b6b38f70 | 1058 | cFYI(1, "posix del rc %d", rc); |
2d785a50 SF |
1059 | if ((rc == 0) || (rc == -ENOENT)) |
1060 | goto psx_del_no_retry; | |
1061 | } | |
1da177e4 | 1062 | |
6050247d | 1063 | retry_std_delete: |
5f0319a7 | 1064 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
2d785a50 | 1065 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
6050247d | 1066 | |
2d785a50 | 1067 | psx_del_no_retry: |
1da177e4 | 1068 | if (!rc) { |
5f0319a7 JL |
1069 | if (inode) |
1070 | drop_nlink(inode); | |
1da177e4 | 1071 | } else if (rc == -ENOENT) { |
5f0319a7 | 1072 | d_drop(dentry); |
1da177e4 | 1073 | } else if (rc == -ETXTBSY) { |
3270958b | 1074 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
a12a1ac7 JL |
1075 | if (rc == 0) |
1076 | drop_nlink(inode); | |
ff694527 | 1077 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1078 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1079 | if (attrs == NULL) { | |
1080 | rc = -ENOMEM; | |
1081 | goto out_reval; | |
1da177e4 | 1082 | } |
388e57b2 SF |
1083 | |
1084 | /* try to reset dos attributes */ | |
ff694527 SF |
1085 | cifs_inode = CIFS_I(inode); |
1086 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1087 | if (origattr == 0) |
1088 | origattr |= ATTR_NORMAL; | |
1089 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1090 | if (dosattr == 0) |
1091 | dosattr |= ATTR_NORMAL; | |
1092 | dosattr |= ATTR_HIDDEN; | |
1093 | ||
1094 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1095 | if (rc != 0) |
1096 | goto out_reval; | |
6050247d SF |
1097 | |
1098 | goto retry_std_delete; | |
1da177e4 | 1099 | } |
6050247d SF |
1100 | |
1101 | /* undo the setattr if we errored out and it's needed */ | |
1102 | if (rc != 0 && dosattr != 0) | |
1103 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1104 | ||
388e57b2 | 1105 | out_reval: |
4523cc30 | 1106 | if (inode) { |
ff694527 SF |
1107 | cifs_inode = CIFS_I(inode); |
1108 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 JL |
1109 | when needed */ |
1110 | inode->i_ctime = current_fs_time(sb); | |
06bcfedd | 1111 | } |
5f0319a7 | 1112 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
ff694527 | 1113 | cifs_inode = CIFS_I(dir); |
6050247d | 1114 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
1da177e4 LT |
1115 | |
1116 | kfree(full_path); | |
6050247d | 1117 | kfree(attrs); |
1da177e4 LT |
1118 | FreeXid(xid); |
1119 | return rc; | |
1120 | } | |
1121 | ||
1122 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) | |
1123 | { | |
6b37faa1 | 1124 | int rc = 0, tmprc; |
1da177e4 LT |
1125 | int xid; |
1126 | struct cifs_sb_info *cifs_sb; | |
1127 | struct cifsTconInfo *pTcon; | |
1128 | char *full_path = NULL; | |
1129 | struct inode *newinode = NULL; | |
cc0bad75 | 1130 | struct cifs_fattr fattr; |
1da177e4 | 1131 | |
b6b38f70 | 1132 | cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode); |
1da177e4 LT |
1133 | |
1134 | xid = GetXid(); | |
1135 | ||
1136 | cifs_sb = CIFS_SB(inode->i_sb); | |
1137 | pTcon = cifs_sb->tcon; | |
1138 | ||
7f57356b | 1139 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1140 | if (full_path == NULL) { |
0f3bc09e | 1141 | rc = -ENOMEM; |
1da177e4 | 1142 | FreeXid(xid); |
0f3bc09e | 1143 | return rc; |
1da177e4 | 1144 | } |
50c2f753 | 1145 | |
fb8c4b14 SF |
1146 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
1147 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & | |
2dd29d31 SF |
1148 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
1149 | u32 oplock = 0; | |
f6d09982 | 1150 | FILE_UNIX_BASIC_INFO *pInfo = |
2dd29d31 | 1151 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
fb8c4b14 | 1152 | if (pInfo == NULL) { |
2dd29d31 SF |
1153 | rc = -ENOMEM; |
1154 | goto mkdir_out; | |
1155 | } | |
50c2f753 | 1156 | |
ce3b0f8d | 1157 | mode &= ~current_umask(); |
2dd29d31 SF |
1158 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
1159 | mode, NULL /* netfid */, pInfo, &oplock, | |
fb8c4b14 SF |
1160 | full_path, cifs_sb->local_nls, |
1161 | cifs_sb->mnt_cifs_flags & | |
2dd29d31 | 1162 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
c45d707f SF |
1163 | if (rc == -EOPNOTSUPP) { |
1164 | kfree(pInfo); | |
1165 | goto mkdir_retry_old; | |
1166 | } else if (rc) { | |
b6b38f70 | 1167 | cFYI(1, "posix mkdir returned 0x%x", rc); |
2dd29d31 SF |
1168 | d_drop(direntry); |
1169 | } else { | |
8f2376ad CG |
1170 | if (pInfo->Type == cpu_to_le32(-1)) { |
1171 | /* no return info, go query for it */ | |
5a07cdf8 | 1172 | kfree(pInfo); |
fb8c4b14 | 1173 | goto mkdir_get_info; |
5a07cdf8 | 1174 | } |
fb8c4b14 SF |
1175 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
1176 | to set uid/gid */ | |
2dd29d31 SF |
1177 | inc_nlink(inode); |
1178 | if (pTcon->nocase) | |
1179 | direntry->d_op = &cifs_ci_dentry_ops; | |
1180 | else | |
1181 | direntry->d_op = &cifs_dentry_ops; | |
cbac3cba | 1182 | |
cc0bad75 JL |
1183 | cifs_unix_basic_to_fattr(&fattr, pInfo, cifs_sb); |
1184 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1185 | if (!newinode) { | |
5a07cdf8 | 1186 | kfree(pInfo); |
cbac3cba | 1187 | goto mkdir_get_info; |
5a07cdf8 | 1188 | } |
6b37faa1 | 1189 | |
2dd29d31 | 1190 | d_instantiate(direntry, newinode); |
cbac3cba | 1191 | |
cbac3cba | 1192 | #ifdef CONFIG_CIFS_DEBUG2 |
b6b38f70 JP |
1193 | cFYI(1, "instantiated dentry %p %s to inode %p", |
1194 | direntry, direntry->d_name.name, newinode); | |
cbac3cba | 1195 | |
fb8c4b14 | 1196 | if (newinode->i_nlink != 2) |
b6b38f70 JP |
1197 | cFYI(1, "unexpected number of links %d", |
1198 | newinode->i_nlink); | |
cbac3cba | 1199 | #endif |
2dd29d31 SF |
1200 | } |
1201 | kfree(pInfo); | |
1202 | goto mkdir_out; | |
fb8c4b14 | 1203 | } |
c45d707f | 1204 | mkdir_retry_old: |
1da177e4 | 1205 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
737b758c SF |
1206 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1207 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 1208 | if (rc) { |
b6b38f70 | 1209 | cFYI(1, "cifs_mkdir returned 0x%x", rc); |
1da177e4 LT |
1210 | d_drop(direntry); |
1211 | } else { | |
fb8c4b14 | 1212 | mkdir_get_info: |
d8c76e6f | 1213 | inc_nlink(inode); |
c18c842b | 1214 | if (pTcon->unix_ext) |
1da177e4 | 1215 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
fb8c4b14 | 1216 | inode->i_sb, xid); |
1da177e4 LT |
1217 | else |
1218 | rc = cifs_get_inode_info(&newinode, full_path, NULL, | |
8b1327f6 | 1219 | inode->i_sb, xid, NULL); |
1da177e4 | 1220 | |
b92327fe SF |
1221 | if (pTcon->nocase) |
1222 | direntry->d_op = &cifs_ci_dentry_ops; | |
1223 | else | |
1224 | direntry->d_op = &cifs_dentry_ops; | |
1da177e4 | 1225 | d_instantiate(direntry, newinode); |
2dd29d31 | 1226 | /* setting nlink not necessary except in cases where we |
fb8c4b14 | 1227 | * failed to get it from the server or was set bogus */ |
2dd29d31 | 1228 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
fb8c4b14 | 1229 | direntry->d_inode->i_nlink = 2; |
95089910 | 1230 | |
ce3b0f8d | 1231 | mode &= ~current_umask(); |
95089910 JL |
1232 | /* must turn on setgid bit if parent dir has it */ |
1233 | if (inode->i_mode & S_ISGID) | |
1234 | mode |= S_ISGID; | |
1235 | ||
c18c842b | 1236 | if (pTcon->unix_ext) { |
4e1e7fb9 JL |
1237 | struct cifs_unix_set_info_args args = { |
1238 | .mode = mode, | |
1239 | .ctime = NO_CHANGE_64, | |
1240 | .atime = NO_CHANGE_64, | |
1241 | .mtime = NO_CHANGE_64, | |
1242 | .device = 0, | |
1243 | }; | |
d0d2f2df | 1244 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
a001e5b5 | 1245 | args.uid = (__u64)current_fsuid(); |
95089910 JL |
1246 | if (inode->i_mode & S_ISGID) |
1247 | args.gid = (__u64)inode->i_gid; | |
1248 | else | |
a001e5b5 | 1249 | args.gid = (__u64)current_fsgid(); |
1da177e4 | 1250 | } else { |
4e1e7fb9 JL |
1251 | args.uid = NO_CHANGE_64; |
1252 | args.gid = NO_CHANGE_64; | |
1da177e4 | 1253 | } |
01ea95e3 JL |
1254 | CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, &args, |
1255 | cifs_sb->local_nls, | |
1256 | cifs_sb->mnt_cifs_flags & | |
1257 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3ce53fc4 | 1258 | } else { |
67750fb9 JL |
1259 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
1260 | (mode & S_IWUGO) == 0) { | |
1261 | FILE_BASIC_INFO pInfo; | |
6b37faa1 JL |
1262 | struct cifsInodeInfo *cifsInode; |
1263 | u32 dosattrs; | |
1264 | ||
67750fb9 | 1265 | memset(&pInfo, 0, sizeof(pInfo)); |
6b37faa1 JL |
1266 | cifsInode = CIFS_I(newinode); |
1267 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; | |
1268 | pInfo.Attributes = cpu_to_le32(dosattrs); | |
1269 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, | |
1270 | full_path, &pInfo, | |
1271 | cifs_sb->local_nls, | |
67750fb9 JL |
1272 | cifs_sb->mnt_cifs_flags & |
1273 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
6b37faa1 JL |
1274 | if (tmprc == 0) |
1275 | cifsInode->cifsAttrs = dosattrs; | |
67750fb9 | 1276 | } |
fb8c4b14 | 1277 | if (direntry->d_inode) { |
b0fd30d3 JL |
1278 | if (cifs_sb->mnt_cifs_flags & |
1279 | CIFS_MOUNT_DYNPERM) | |
1280 | direntry->d_inode->i_mode = | |
1281 | (mode | S_IFDIR); | |
4e94a105 | 1282 | |
fb8c4b14 | 1283 | if (cifs_sb->mnt_cifs_flags & |
6473a559 | 1284 | CIFS_MOUNT_SET_UID) { |
fb8c4b14 | 1285 | direntry->d_inode->i_uid = |
a001e5b5 | 1286 | current_fsuid(); |
95089910 JL |
1287 | if (inode->i_mode & S_ISGID) |
1288 | direntry->d_inode->i_gid = | |
1289 | inode->i_gid; | |
1290 | else | |
1291 | direntry->d_inode->i_gid = | |
a001e5b5 | 1292 | current_fsgid(); |
6473a559 SF |
1293 | } |
1294 | } | |
2a138ebb | 1295 | } |
1da177e4 | 1296 | } |
fb8c4b14 | 1297 | mkdir_out: |
1da177e4 LT |
1298 | kfree(full_path); |
1299 | FreeXid(xid); | |
1300 | return rc; | |
1301 | } | |
1302 | ||
1303 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1304 | { | |
1305 | int rc = 0; | |
1306 | int xid; | |
1307 | struct cifs_sb_info *cifs_sb; | |
1308 | struct cifsTconInfo *pTcon; | |
1309 | char *full_path = NULL; | |
1310 | struct cifsInodeInfo *cifsInode; | |
1311 | ||
b6b38f70 | 1312 | cFYI(1, "cifs_rmdir, inode = 0x%p", inode); |
1da177e4 LT |
1313 | |
1314 | xid = GetXid(); | |
1315 | ||
1316 | cifs_sb = CIFS_SB(inode->i_sb); | |
1317 | pTcon = cifs_sb->tcon; | |
1318 | ||
7f57356b | 1319 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1320 | if (full_path == NULL) { |
0f3bc09e | 1321 | rc = -ENOMEM; |
1da177e4 | 1322 | FreeXid(xid); |
0f3bc09e | 1323 | return rc; |
1da177e4 LT |
1324 | } |
1325 | ||
737b758c SF |
1326 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
1327 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
1328 | |
1329 | if (!rc) { | |
9a53c3a7 | 1330 | drop_nlink(inode); |
3677db10 | 1331 | spin_lock(&direntry->d_inode->i_lock); |
fb8c4b14 | 1332 | i_size_write(direntry->d_inode, 0); |
ce71ec36 | 1333 | clear_nlink(direntry->d_inode); |
3677db10 | 1334 | spin_unlock(&direntry->d_inode->i_lock); |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | cifsInode = CIFS_I(direntry->d_inode); | |
1338 | cifsInode->time = 0; /* force revalidate to go get info when | |
1339 | needed */ | |
42c24544 SF |
1340 | |
1341 | cifsInode = CIFS_I(inode); | |
1342 | cifsInode->time = 0; /* force revalidate to get parent dir info | |
1343 | since cached search results now invalid */ | |
1344 | ||
1da177e4 LT |
1345 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
1346 | current_fs_time(inode->i_sb); | |
1347 | ||
1348 | kfree(full_path); | |
1349 | FreeXid(xid); | |
1350 | return rc; | |
1351 | } | |
1352 | ||
ee2fd967 SF |
1353 | static int |
1354 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, | |
1355 | struct dentry *to_dentry, const char *toPath) | |
1356 | { | |
1357 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
1358 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1359 | __u16 srcfid; | |
1360 | int oplock, rc; | |
1361 | ||
1362 | /* try path-based rename first */ | |
1363 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, | |
1364 | cifs_sb->mnt_cifs_flags & | |
1365 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1366 | ||
1367 | /* | |
1368 | * don't bother with rename by filehandle unless file is busy and | |
1369 | * source Note that cross directory moves do not work with | |
1370 | * rename by filehandle to various Windows servers. | |
1371 | */ | |
1372 | if (rc == 0 || rc != -ETXTBSY) | |
1373 | return rc; | |
1374 | ||
1375 | /* open the file to be renamed -- we need DELETE perms */ | |
1376 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, | |
1377 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, | |
1378 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1379 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1380 | ||
1381 | if (rc == 0) { | |
1382 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, | |
1383 | (const char *) to_dentry->d_name.name, | |
1384 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
1385 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1386 | ||
1387 | CIFSSMBClose(xid, pTcon, srcfid); | |
1388 | } | |
1389 | ||
1390 | return rc; | |
1391 | } | |
1392 | ||
14121bdc JL |
1393 | int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, |
1394 | struct inode *target_dir, struct dentry *target_dentry) | |
1da177e4 | 1395 | { |
ee2fd967 SF |
1396 | char *fromName = NULL; |
1397 | char *toName = NULL; | |
1da177e4 LT |
1398 | struct cifs_sb_info *cifs_sb_source; |
1399 | struct cifs_sb_info *cifs_sb_target; | |
14121bdc | 1400 | struct cifsTconInfo *tcon; |
ee2fd967 SF |
1401 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1402 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
8d281efb | 1403 | int xid, rc, tmprc; |
1da177e4 | 1404 | |
14121bdc JL |
1405 | cifs_sb_target = CIFS_SB(target_dir->i_sb); |
1406 | cifs_sb_source = CIFS_SB(source_dir->i_sb); | |
1407 | tcon = cifs_sb_source->tcon; | |
1da177e4 | 1408 | |
ee2fd967 SF |
1409 | xid = GetXid(); |
1410 | ||
1411 | /* | |
1412 | * BB: this might be allowed if same server, but different share. | |
1413 | * Consider adding support for this | |
1414 | */ | |
14121bdc | 1415 | if (tcon != cifs_sb_target->tcon) { |
ee2fd967 SF |
1416 | rc = -EXDEV; |
1417 | goto cifs_rename_exit; | |
1da177e4 LT |
1418 | } |
1419 | ||
ee2fd967 SF |
1420 | /* |
1421 | * we already have the rename sem so we do not need to | |
1422 | * grab it again here to protect the path integrity | |
1423 | */ | |
14121bdc | 1424 | fromName = build_path_from_dentry(source_dentry); |
ee2fd967 SF |
1425 | if (fromName == NULL) { |
1426 | rc = -ENOMEM; | |
1427 | goto cifs_rename_exit; | |
1428 | } | |
1429 | ||
14121bdc | 1430 | toName = build_path_from_dentry(target_dentry); |
ee2fd967 | 1431 | if (toName == NULL) { |
1da177e4 LT |
1432 | rc = -ENOMEM; |
1433 | goto cifs_rename_exit; | |
1434 | } | |
1435 | ||
14121bdc JL |
1436 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1437 | target_dentry, toName); | |
ee2fd967 | 1438 | |
14121bdc JL |
1439 | if (rc == -EEXIST && tcon->unix_ext) { |
1440 | /* | |
1441 | * Are src and dst hardlinks of same inode? We can | |
1442 | * only tell with unix extensions enabled | |
1443 | */ | |
1444 | info_buf_source = | |
1445 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1446 | GFP_KERNEL); | |
1447 | if (info_buf_source == NULL) { | |
1448 | rc = -ENOMEM; | |
1449 | goto cifs_rename_exit; | |
1450 | } | |
1451 | ||
1452 | info_buf_target = info_buf_source + 1; | |
8d281efb | 1453 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName, |
14121bdc JL |
1454 | info_buf_source, |
1455 | cifs_sb_source->local_nls, | |
1456 | cifs_sb_source->mnt_cifs_flags & | |
1457 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
8d281efb | 1458 | if (tmprc != 0) |
14121bdc | 1459 | goto unlink_target; |
ee2fd967 | 1460 | |
8d281efb | 1461 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, |
14121bdc JL |
1462 | toName, info_buf_target, |
1463 | cifs_sb_target->local_nls, | |
1464 | /* remap based on source sb */ | |
1465 | cifs_sb_source->mnt_cifs_flags & | |
1466 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1467 | ||
8d281efb | 1468 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1469 | info_buf_target->UniqueId)) { |
14121bdc | 1470 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1471 | rc = 0; |
14121bdc | 1472 | goto cifs_rename_exit; |
ae6884a9 | 1473 | } |
14121bdc | 1474 | } /* else ... BB we could add the same check for Windows by |
ee2fd967 | 1475 | checking the UniqueId via FILE_INTERNAL_INFO */ |
14121bdc | 1476 | |
ee2fd967 | 1477 | unlink_target: |
fc6f3943 JL |
1478 | /* Try unlinking the target dentry if it's not negative */ |
1479 | if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) { | |
8d281efb | 1480 | tmprc = cifs_unlink(target_dir, target_dentry); |
14121bdc JL |
1481 | if (tmprc) |
1482 | goto cifs_rename_exit; | |
1483 | ||
14121bdc JL |
1484 | rc = cifs_do_rename(xid, source_dentry, fromName, |
1485 | target_dentry, toName); | |
1da177e4 LT |
1486 | } |
1487 | ||
1488 | cifs_rename_exit: | |
ee2fd967 | 1489 | kfree(info_buf_source); |
1da177e4 LT |
1490 | kfree(fromName); |
1491 | kfree(toName); | |
1492 | FreeXid(xid); | |
1493 | return rc; | |
1494 | } | |
1495 | ||
df2cf170 JL |
1496 | static bool |
1497 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1498 | { |
df2cf170 | 1499 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
1da177e4 | 1500 | |
df2cf170 JL |
1501 | if (cifs_i->clientCanCacheRead) |
1502 | return false; | |
1da177e4 | 1503 | |
df2cf170 JL |
1504 | if (!lookupCacheEnabled) |
1505 | return true; | |
1da177e4 | 1506 | |
df2cf170 JL |
1507 | if (cifs_i->time == 0) |
1508 | return true; | |
1da177e4 | 1509 | |
df2cf170 JL |
1510 | /* FIXME: the actimeo should be tunable */ |
1511 | if (time_after_eq(jiffies, cifs_i->time + HZ)) | |
1512 | return true; | |
1513 | ||
1514 | return false; | |
1515 | } | |
1516 | ||
1517 | /* check invalid_mapping flag and zap the cache if it's set */ | |
1518 | static void | |
1519 | cifs_invalidate_mapping(struct inode *inode) | |
1520 | { | |
1521 | int rc; | |
1522 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
1523 | ||
1524 | cifs_i->invalid_mapping = false; | |
1525 | ||
1526 | /* write back any cached data */ | |
1527 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
1528 | rc = filemap_write_and_wait(inode->i_mapping); | |
1529 | if (rc) | |
1530 | cifs_i->write_behind_rc = rc; | |
1531 | } | |
1532 | invalidate_remote_inode(inode); | |
1533 | } | |
1534 | ||
abab095d JL |
1535 | int cifs_revalidate_file(struct file *filp) |
1536 | { | |
1537 | int rc = 0; | |
1538 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1539 | ||
1540 | if (!cifs_inode_needs_reval(inode)) | |
1541 | goto check_inval; | |
1542 | ||
1543 | if (CIFS_SB(inode->i_sb)->tcon->unix_ext) | |
1544 | rc = cifs_get_file_info_unix(filp); | |
1545 | else | |
1546 | rc = cifs_get_file_info(filp); | |
1547 | ||
1548 | check_inval: | |
1549 | if (CIFS_I(inode)->invalid_mapping) | |
1550 | cifs_invalidate_mapping(inode); | |
1551 | ||
1552 | return rc; | |
1553 | } | |
1554 | ||
df2cf170 JL |
1555 | /* revalidate a dentry's inode attributes */ |
1556 | int cifs_revalidate_dentry(struct dentry *dentry) | |
1557 | { | |
1558 | int xid; | |
1559 | int rc = 0; | |
1560 | char *full_path = NULL; | |
1561 | struct inode *inode = dentry->d_inode; | |
1562 | struct super_block *sb = dentry->d_sb; | |
1563 | ||
1564 | if (inode == NULL) | |
1565 | return -ENOENT; | |
1da177e4 LT |
1566 | |
1567 | xid = GetXid(); | |
1568 | ||
df2cf170 JL |
1569 | if (!cifs_inode_needs_reval(inode)) |
1570 | goto check_inval; | |
1da177e4 LT |
1571 | |
1572 | /* can not safely grab the rename sem here if rename calls revalidate | |
1573 | since that would deadlock */ | |
df2cf170 | 1574 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 1575 | if (full_path == NULL) { |
0f3bc09e | 1576 | rc = -ENOMEM; |
df2cf170 | 1577 | goto check_inval; |
1da177e4 LT |
1578 | } |
1579 | ||
df2cf170 JL |
1580 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " |
1581 | "jiffies %ld", full_path, inode, inode->i_count.counter, | |
1582 | dentry, dentry->d_time, jiffies)); | |
1da177e4 | 1583 | |
df2cf170 JL |
1584 | if (CIFS_SB(sb)->tcon->unix_ext) |
1585 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); | |
1586 | else | |
1587 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
1588 | xid, NULL); | |
1da177e4 | 1589 | |
df2cf170 JL |
1590 | check_inval: |
1591 | if (CIFS_I(inode)->invalid_mapping) | |
1592 | cifs_invalidate_mapping(inode); | |
50c2f753 | 1593 | |
1da177e4 LT |
1594 | kfree(full_path); |
1595 | FreeXid(xid); | |
1596 | return rc; | |
1597 | } | |
1598 | ||
1599 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1600 | struct kstat *stat) | |
1601 | { | |
df2cf170 | 1602 | int err = cifs_revalidate_dentry(dentry); |
5fe14c85 | 1603 | if (!err) { |
1da177e4 | 1604 | generic_fillattr(dentry->d_inode, stat); |
5fe14c85 | 1605 | stat->blksize = CIFS_MAX_MSGSIZE; |
cc0bad75 | 1606 | stat->ino = CIFS_I(dentry->d_inode)->uniqueid; |
5fe14c85 | 1607 | } |
1da177e4 LT |
1608 | return err; |
1609 | } | |
1610 | ||
1611 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
1612 | { | |
1613 | pgoff_t index = from >> PAGE_CACHE_SHIFT; | |
1614 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); | |
1615 | struct page *page; | |
1da177e4 LT |
1616 | int rc = 0; |
1617 | ||
1618 | page = grab_cache_page(mapping, index); | |
1619 | if (!page) | |
1620 | return -ENOMEM; | |
1621 | ||
eebd2aa3 | 1622 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
1da177e4 LT |
1623 | unlock_page(page); |
1624 | page_cache_release(page); | |
1625 | return rc; | |
1626 | } | |
1627 | ||
fb8c4b14 | 1628 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
3677db10 | 1629 | { |
c08d3b0e | 1630 | loff_t oldsize; |
1631 | int err; | |
3677db10 | 1632 | |
ba6a46a0 | 1633 | spin_lock(&inode->i_lock); |
c08d3b0e | 1634 | err = inode_newsize_ok(inode, offset); |
1635 | if (err) { | |
ba6a46a0 | 1636 | spin_unlock(&inode->i_lock); |
c08d3b0e | 1637 | goto out; |
ba6a46a0 | 1638 | } |
c08d3b0e | 1639 | |
1640 | oldsize = inode->i_size; | |
3677db10 | 1641 | i_size_write(inode, offset); |
ba6a46a0 | 1642 | spin_unlock(&inode->i_lock); |
c08d3b0e | 1643 | truncate_pagecache(inode, oldsize, offset); |
acfa4380 | 1644 | if (inode->i_op->truncate) |
3677db10 | 1645 | inode->i_op->truncate(inode); |
c08d3b0e | 1646 | out: |
1647 | return err; | |
3677db10 SF |
1648 | } |
1649 | ||
8efdbde6 JL |
1650 | static int |
1651 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
1652 | int xid, char *full_path) | |
1653 | { | |
1654 | int rc; | |
1655 | struct cifsFileInfo *open_file; | |
1656 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1657 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1658 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1659 | ||
1660 | /* | |
1661 | * To avoid spurious oplock breaks from server, in the case of | |
1662 | * inodes that we already have open, avoid doing path based | |
1663 | * setting of file size if we can do it by handle. | |
1664 | * This keeps our caching token (oplock) and avoids timeouts | |
1665 | * when the local oplock break takes longer to flush | |
1666 | * writebehind data than the SMB timeout for the SetPathInfo | |
1667 | * request would allow | |
1668 | */ | |
1669 | open_file = find_writable_file(cifsInode); | |
1670 | if (open_file) { | |
1671 | __u16 nfid = open_file->netfid; | |
1672 | __u32 npid = open_file->pid; | |
1673 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, | |
1674 | npid, false); | |
6ab409b5 | 1675 | cifsFileInfo_put(open_file); |
b6b38f70 | 1676 | cFYI(1, "SetFSize for attrs rc = %d", rc); |
8efdbde6 JL |
1677 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1678 | unsigned int bytes_written; | |
1679 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, | |
1680 | &bytes_written, NULL, NULL, 1); | |
b6b38f70 | 1681 | cFYI(1, "Wrt seteof rc %d", rc); |
8efdbde6 JL |
1682 | } |
1683 | } else | |
1684 | rc = -EINVAL; | |
1685 | ||
1686 | if (rc != 0) { | |
1687 | /* Set file size by pathname rather than by handle | |
1688 | either because no valid, writeable file handle for | |
1689 | it was found or because there was an error setting | |
1690 | it by handle */ | |
1691 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, | |
1692 | false, cifs_sb->local_nls, | |
1693 | cifs_sb->mnt_cifs_flags & | |
1694 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b6b38f70 | 1695 | cFYI(1, "SetEOF by path (setattrs) rc = %d", rc); |
8efdbde6 JL |
1696 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
1697 | __u16 netfid; | |
1698 | int oplock = 0; | |
1699 | ||
1700 | rc = SMBLegacyOpen(xid, pTcon, full_path, | |
1701 | FILE_OPEN, GENERIC_WRITE, | |
1702 | CREATE_NOT_DIR, &netfid, &oplock, NULL, | |
1703 | cifs_sb->local_nls, | |
1704 | cifs_sb->mnt_cifs_flags & | |
1705 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1706 | if (rc == 0) { | |
1707 | unsigned int bytes_written; | |
1708 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, | |
1709 | attrs->ia_size, | |
1710 | &bytes_written, NULL, | |
1711 | NULL, 1); | |
b6b38f70 | 1712 | cFYI(1, "wrt seteof rc %d", rc); |
8efdbde6 JL |
1713 | CIFSSMBClose(xid, pTcon, netfid); |
1714 | } | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | if (rc == 0) { | |
fbec9ab9 | 1719 | cifsInode->server_eof = attrs->ia_size; |
8efdbde6 JL |
1720 | rc = cifs_vmtruncate(inode, attrs->ia_size); |
1721 | cifs_truncate_page(inode->i_mapping, inode->i_size); | |
1722 | } | |
1723 | ||
1724 | return rc; | |
1725 | } | |
1726 | ||
3fe5c1dd JL |
1727 | static int |
1728 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
1729 | { | |
1730 | int rc; | |
1731 | int xid; | |
1732 | char *full_path = NULL; | |
1733 | struct inode *inode = direntry->d_inode; | |
1734 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
1735 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
1736 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
1737 | struct cifs_unix_set_info_args *args = NULL; | |
3bbeeb3c | 1738 | struct cifsFileInfo *open_file; |
3fe5c1dd | 1739 | |
b6b38f70 JP |
1740 | cFYI(1, "setattr_unix on file %s attrs->ia_valid=0x%x", |
1741 | direntry->d_name.name, attrs->ia_valid); | |
3fe5c1dd JL |
1742 | |
1743 | xid = GetXid(); | |
1744 | ||
1745 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { | |
1746 | /* check if we have permission to change attrs */ | |
1747 | rc = inode_change_ok(inode, attrs); | |
1748 | if (rc < 0) | |
1749 | goto out; | |
1750 | else | |
1751 | rc = 0; | |
1752 | } | |
1753 | ||
1754 | full_path = build_path_from_dentry(direntry); | |
1755 | if (full_path == NULL) { | |
1756 | rc = -ENOMEM; | |
1757 | goto out; | |
1758 | } | |
1759 | ||
0f4d634c JL |
1760 | /* |
1761 | * Attempt to flush data before changing attributes. We need to do | |
1762 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1763 | * ownership or mode then we may also need to do this. Here, we take | |
1764 | * the safe way out and just do the flush on all setattr requests. If | |
1765 | * the flush returns error, store it to report later and continue. | |
1766 | * | |
1767 | * BB: This should be smarter. Why bother flushing pages that | |
1768 | * will be truncated anyway? Also, should we error out here if | |
1769 | * the flush returns error? | |
1770 | */ | |
1771 | rc = filemap_write_and_wait(inode->i_mapping); | |
1772 | if (rc != 0) { | |
1773 | cifsInode->write_behind_rc = rc; | |
1774 | rc = 0; | |
3fe5c1dd JL |
1775 | } |
1776 | ||
1777 | if (attrs->ia_valid & ATTR_SIZE) { | |
1778 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
1779 | if (rc != 0) | |
1780 | goto out; | |
1781 | } | |
1782 | ||
1783 | /* skip mode change if it's just for clearing setuid/setgid */ | |
1784 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1785 | attrs->ia_valid &= ~ATTR_MODE; | |
1786 | ||
1787 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
1788 | if (args == NULL) { | |
1789 | rc = -ENOMEM; | |
1790 | goto out; | |
1791 | } | |
1792 | ||
1793 | /* set up the struct */ | |
1794 | if (attrs->ia_valid & ATTR_MODE) | |
1795 | args->mode = attrs->ia_mode; | |
1796 | else | |
1797 | args->mode = NO_CHANGE_64; | |
1798 | ||
1799 | if (attrs->ia_valid & ATTR_UID) | |
1800 | args->uid = attrs->ia_uid; | |
1801 | else | |
1802 | args->uid = NO_CHANGE_64; | |
1803 | ||
1804 | if (attrs->ia_valid & ATTR_GID) | |
1805 | args->gid = attrs->ia_gid; | |
1806 | else | |
1807 | args->gid = NO_CHANGE_64; | |
1808 | ||
1809 | if (attrs->ia_valid & ATTR_ATIME) | |
1810 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
1811 | else | |
1812 | args->atime = NO_CHANGE_64; | |
1813 | ||
1814 | if (attrs->ia_valid & ATTR_MTIME) | |
1815 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
1816 | else | |
1817 | args->mtime = NO_CHANGE_64; | |
1818 | ||
1819 | if (attrs->ia_valid & ATTR_CTIME) | |
1820 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
1821 | else | |
1822 | args->ctime = NO_CHANGE_64; | |
1823 | ||
1824 | args->device = 0; | |
3bbeeb3c JL |
1825 | open_file = find_writable_file(cifsInode); |
1826 | if (open_file) { | |
1827 | u16 nfid = open_file->netfid; | |
1828 | u32 npid = open_file->pid; | |
1829 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); | |
6ab409b5 | 1830 | cifsFileInfo_put(open_file); |
3bbeeb3c JL |
1831 | } else { |
1832 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, | |
01ea95e3 JL |
1833 | cifs_sb->local_nls, |
1834 | cifs_sb->mnt_cifs_flags & | |
1835 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
3bbeeb3c | 1836 | } |
3fe5c1dd | 1837 | |
ccd4bb1b | 1838 | if (!rc) { |
3fe5c1dd | 1839 | rc = inode_setattr(inode, attrs); |
ccd4bb1b SF |
1840 | |
1841 | /* force revalidate when any of these times are set since some | |
1842 | of the fs types (eg ext3, fat) do not have fine enough | |
1843 | time granularity to match protocol, and we do not have a | |
1844 | a way (yet) to query the server fs's time granularity (and | |
1845 | whether it rounds times down). | |
1846 | */ | |
1847 | if (!rc && (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME))) | |
1848 | cifsInode->time = 0; | |
1849 | } | |
3fe5c1dd JL |
1850 | out: |
1851 | kfree(args); | |
1852 | kfree(full_path); | |
1853 | FreeXid(xid); | |
1854 | return rc; | |
1855 | } | |
1856 | ||
0510eeb7 JL |
1857 | static int |
1858 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 LT |
1859 | { |
1860 | int xid; | |
3fe5c1dd JL |
1861 | struct inode *inode = direntry->d_inode; |
1862 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
3fe5c1dd | 1863 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
1864 | char *full_path = NULL; |
1865 | int rc = -EACCES; | |
feb3e20c | 1866 | __u32 dosattr = 0; |
4e1e7fb9 | 1867 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 1868 | |
1da177e4 LT |
1869 | xid = GetXid(); |
1870 | ||
b6b38f70 JP |
1871 | cFYI(1, "setattr on file %s attrs->iavalid 0x%x", |
1872 | direntry->d_name.name, attrs->ia_valid); | |
6473a559 | 1873 | |
2a138ebb | 1874 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
6473a559 | 1875 | /* check if we have permission to change attrs */ |
02eadeff | 1876 | rc = inode_change_ok(inode, attrs); |
fb8c4b14 | 1877 | if (rc < 0) { |
6473a559 SF |
1878 | FreeXid(xid); |
1879 | return rc; | |
1880 | } else | |
1881 | rc = 0; | |
1882 | } | |
50c2f753 | 1883 | |
7f57356b | 1884 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1885 | if (full_path == NULL) { |
0f3bc09e | 1886 | rc = -ENOMEM; |
1da177e4 | 1887 | FreeXid(xid); |
0f3bc09e | 1888 | return rc; |
1da177e4 | 1889 | } |
1da177e4 | 1890 | |
0f4d634c JL |
1891 | /* |
1892 | * Attempt to flush data before changing attributes. We need to do | |
1893 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
1894 | * ownership or mode then we may also need to do this. Here, we take | |
1895 | * the safe way out and just do the flush on all setattr requests. If | |
1896 | * the flush returns error, store it to report later and continue. | |
1897 | * | |
1898 | * BB: This should be smarter. Why bother flushing pages that | |
1899 | * will be truncated anyway? Also, should we error out here if | |
1900 | * the flush returns error? | |
1901 | */ | |
1902 | rc = filemap_write_and_wait(inode->i_mapping); | |
1903 | if (rc != 0) { | |
1904 | cifsInode->write_behind_rc = rc; | |
1905 | rc = 0; | |
50531444 | 1906 | } |
cea21805 | 1907 | |
50531444 | 1908 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
1909 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
1910 | if (rc != 0) | |
e30dcf3a | 1911 | goto cifs_setattr_exit; |
1da177e4 | 1912 | } |
4ca691a8 JL |
1913 | |
1914 | /* | |
1915 | * Without unix extensions we can't send ownership changes to the | |
1916 | * server, so silently ignore them. This is consistent with how | |
1917 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With | |
1918 | * CIFSACL support + proper Windows to Unix idmapping, we may be | |
1919 | * able to support this in the future. | |
1920 | */ | |
3fe5c1dd | 1921 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 1922 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 1923 | |
d32c4f26 JL |
1924 | /* skip mode change if it's just for clearing setuid/setgid */ |
1925 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
1926 | attrs->ia_valid &= ~ATTR_MODE; | |
1927 | ||
1da177e4 | 1928 | if (attrs->ia_valid & ATTR_MODE) { |
b6b38f70 | 1929 | cFYI(1, "Mode changed to 0%o", attrs->ia_mode); |
1da177e4 | 1930 | mode = attrs->ia_mode; |
1da177e4 LT |
1931 | } |
1932 | ||
3fe5c1dd | 1933 | if (attrs->ia_valid & ATTR_MODE) { |
cdbce9c8 | 1934 | rc = 0; |
97837582 SF |
1935 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1936 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
02eadeff | 1937 | rc = mode_to_acl(inode, full_path, mode); |
5132861a | 1938 | else |
97837582 | 1939 | #endif |
5132861a JL |
1940 | if (((mode & S_IWUGO) == 0) && |
1941 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
1942 | |
1943 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
1944 | ||
5132861a JL |
1945 | /* fix up mode if we're not using dynperm */ |
1946 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
1947 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
1948 | } else if ((mode & S_IWUGO) && | |
1949 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
1950 | |
1951 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
1952 | /* Attributes of 0 are ignored */ | |
1953 | if (dosattr == 0) | |
1954 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
1955 | |
1956 | /* reset local inode permissions to normal */ | |
1957 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1958 | attrs->ia_mode &= ~(S_IALLUGO); | |
1959 | if (S_ISDIR(inode->i_mode)) | |
1960 | attrs->ia_mode |= | |
1961 | cifs_sb->mnt_dir_mode; | |
1962 | else | |
1963 | attrs->ia_mode |= | |
1964 | cifs_sb->mnt_file_mode; | |
1965 | } | |
1966 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
1967 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
1968 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 1969 | } |
1da177e4 LT |
1970 | } |
1971 | ||
feb3e20c JL |
1972 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
1973 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
1974 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
1975 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 1976 | |
e30dcf3a SF |
1977 | /* Even if error on time set, no sense failing the call if |
1978 | the server would set the time to a reasonable value anyway, | |
1979 | and this check ensures that we are not being called from | |
1980 | sys_utimes in which case we ought to fail the call back to | |
1981 | the user when the server rejects the call */ | |
fb8c4b14 | 1982 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 1983 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 1984 | rc = 0; |
1da177e4 LT |
1985 | } |
1986 | ||
1987 | /* do not need local check to inode_check_ok since the server does | |
1988 | that */ | |
1989 | if (!rc) | |
02eadeff | 1990 | rc = inode_setattr(inode, attrs); |
e30dcf3a | 1991 | cifs_setattr_exit: |
1da177e4 LT |
1992 | kfree(full_path); |
1993 | FreeXid(xid); | |
1994 | return rc; | |
1995 | } | |
1996 | ||
0510eeb7 JL |
1997 | int |
1998 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
1999 | { | |
2000 | struct inode *inode = direntry->d_inode; | |
2001 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
2002 | struct cifsTconInfo *pTcon = cifs_sb->tcon; | |
2003 | ||
2004 | if (pTcon->unix_ext) | |
2005 | return cifs_setattr_unix(direntry, attrs); | |
2006 | ||
2007 | return cifs_setattr_nounix(direntry, attrs); | |
2008 | ||
2009 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2010 | } | |
2011 | ||
99ee4dbd | 2012 | #if 0 |
1da177e4 LT |
2013 | void cifs_delete_inode(struct inode *inode) |
2014 | { | |
b6b38f70 | 2015 | cFYI(1, "In cifs_delete_inode, inode = 0x%p", inode); |
1da177e4 LT |
2016 | /* may have to add back in if and when safe distributed caching of |
2017 | directories added e.g. via FindNotify */ | |
2018 | } | |
99ee4dbd | 2019 | #endif |