Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
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 | 24 | #include <linux/pagemap.h> |
4f73c7d3 | 25 | #include <linux/freezer.h> |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
5dd43ce2 | 27 | #include <linux/wait_bit.h> |
174cd4b1 | 28 | |
1da177e4 LT |
29 | #include <asm/div64.h> |
30 | #include "cifsfs.h" | |
31 | #include "cifspdu.h" | |
32 | #include "cifsglob.h" | |
33 | #include "cifsproto.h" | |
34 | #include "cifs_debug.h" | |
35 | #include "cifs_fs_sb.h" | |
2baa2682 | 36 | #include "cifs_unicode.h" |
9451a9a5 | 37 | #include "fscache.h" |
1da177e4 | 38 | |
70eff55d | 39 | |
01c64fea | 40 | static void cifs_set_ops(struct inode *inode) |
70eff55d CH |
41 | { |
42 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
43 | ||
44 | switch (inode->i_mode & S_IFMT) { | |
45 | case S_IFREG: | |
46 | inode->i_op = &cifs_file_inode_ops; | |
47 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
48 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
49 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
50 | else | |
51 | inode->i_fop = &cifs_file_direct_ops; | |
8be7e6ba PS |
52 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
53 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
54 | inode->i_fop = &cifs_file_strict_nobrl_ops; | |
55 | else | |
56 | inode->i_fop = &cifs_file_strict_ops; | |
70eff55d CH |
57 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
58 | inode->i_fop = &cifs_file_nobrl_ops; | |
59 | else { /* not direct, send byte range locks */ | |
60 | inode->i_fop = &cifs_file_ops; | |
61 | } | |
62 | ||
70eff55d | 63 | /* check if server can support readpages */ |
0d424ad0 | 64 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf < |
09cbfeaf | 65 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
70eff55d CH |
66 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
67 | else | |
68 | inode->i_data.a_ops = &cifs_addr_ops; | |
69 | break; | |
70 | case S_IFDIR: | |
bc5b6e24 | 71 | #ifdef CONFIG_CIFS_DFS_UPCALL |
01c64fea | 72 | if (IS_AUTOMOUNT(inode)) { |
7962670e IM |
73 | inode->i_op = &cifs_dfs_referral_inode_operations; |
74 | } else { | |
bc5b6e24 SF |
75 | #else /* NO DFS support, treat as a directory */ |
76 | { | |
77 | #endif | |
7962670e IM |
78 | inode->i_op = &cifs_dir_inode_ops; |
79 | inode->i_fop = &cifs_dir_ops; | |
80 | } | |
70eff55d CH |
81 | break; |
82 | case S_IFLNK: | |
83 | inode->i_op = &cifs_symlink_inode_ops; | |
84 | break; | |
85 | default: | |
86 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
87 | break; | |
88 | } | |
89 | } | |
90 | ||
df2cf170 JL |
91 | /* check inode attributes against fattr. If they don't match, tag the |
92 | * inode for cache invalidation | |
93 | */ | |
94 | static void | |
95 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
96 | { | |
97 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
98 | ||
f96637be JP |
99 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
100 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
101 | |
102 | if (inode->i_state & I_NEW) { | |
f96637be JP |
103 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
104 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
105 | return; |
106 | } | |
107 | ||
108 | /* don't bother with revalidation if we have an oplock */ | |
18cceb6a | 109 | if (CIFS_CACHE_READ(cifs_i)) { |
f96637be JP |
110 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
111 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
112 | return; |
113 | } | |
114 | ||
115 | /* revalidate if mtime or size have changed */ | |
918c9009 | 116 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
95390201 | 117 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
df2cf170 | 118 | cifs_i->server_eof == fattr->cf_eof) { |
f96637be JP |
119 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
120 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
121 | return; |
122 | } | |
123 | ||
f96637be JP |
124 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
125 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 126 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
127 | } |
128 | ||
74d290da JM |
129 | /* |
130 | * copy nlink to the inode, unless it wasn't provided. Provide | |
131 | * sane values if we don't have an existing one and none was provided | |
132 | */ | |
133 | static void | |
134 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
135 | { | |
136 | /* | |
137 | * if we're in a situation where we can't trust what we | |
138 | * got from the server (readdir, some non-unix cases) | |
139 | * fake reasonable values | |
140 | */ | |
141 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
142 | /* only provide fake values on a new inode */ | |
143 | if (inode->i_state & I_NEW) { | |
144 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
145 | set_nlink(inode, 2); | |
146 | else | |
147 | set_nlink(inode, 1); | |
148 | } | |
149 | return; | |
150 | } | |
151 | ||
152 | /* we trust the server, so update it */ | |
153 | set_nlink(inode, fattr->cf_nlink); | |
154 | } | |
155 | ||
cc0bad75 JL |
156 | /* populate an inode with info from a cifs_fattr struct */ |
157 | void | |
158 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 159 | { |
cc0bad75 | 160 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 161 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 162 | |
df2cf170 JL |
163 | cifs_revalidate_cache(inode, fattr); |
164 | ||
b7ca6928 | 165 | spin_lock(&inode->i_lock); |
918c9009 DD |
166 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
167 | fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); | |
168 | fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); | |
9b9c5bea | 169 | /* we do not want atime to be less than mtime, it broke some apps */ |
69738cfd | 170 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
9b9c5bea SF |
171 | inode->i_atime = fattr->cf_mtime; |
172 | else | |
173 | inode->i_atime = fattr->cf_atime; | |
95390201 AB |
174 | inode->i_mtime = fattr->cf_mtime; |
175 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 176 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 177 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
178 | inode->i_uid = fattr->cf_uid; |
179 | inode->i_gid = fattr->cf_gid; | |
180 | ||
0b8f18e3 JL |
181 | /* if dynperm is set, don't clobber existing mode */ |
182 | if (inode->i_state & I_NEW || | |
183 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
184 | inode->i_mode = fattr->cf_mode; | |
185 | ||
cc0bad75 | 186 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 187 | |
0b8f18e3 JL |
188 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
189 | cifs_i->time = 0; | |
190 | else | |
191 | cifs_i->time = jiffies; | |
192 | ||
aff8d5ca JL |
193 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
194 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
195 | else | |
196 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 197 | |
835a36ca | 198 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
199 | /* |
200 | * Can't safely change the file size here if the client is writing to | |
201 | * it due to potential races. | |
202 | */ | |
cc0bad75 JL |
203 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
204 | i_size_write(inode, fattr->cf_eof); | |
205 | ||
206 | /* | |
207 | * i_blocks is not related to (i_size / i_blksize), | |
208 | * but instead 512 byte (2**9) size is required for | |
209 | * calculating num blocks. | |
210 | */ | |
211 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
212 | } | |
213 | spin_unlock(&inode->i_lock); | |
214 | ||
01c64fea DH |
215 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
216 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
217 | if (inode->i_state & I_NEW) |
218 | cifs_set_ops(inode); | |
cc0bad75 JL |
219 | } |
220 | ||
4065c802 JL |
221 | void |
222 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
223 | { | |
224 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
225 | ||
226 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
227 | return; | |
228 | ||
229 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
230 | } | |
231 | ||
cc0bad75 JL |
232 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
233 | void | |
234 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
235 | struct cifs_sb_info *cifs_sb) | |
236 | { | |
237 | memset(fattr, 0, sizeof(*fattr)); | |
238 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
239 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
240 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
241 | ||
242 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
243 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
244 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
245 | /* old POSIX extensions don't get create time */ |
246 | ||
cc0bad75 | 247 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
248 | |
249 | /* | |
250 | * Since we set the inode type below we need to mask off | |
251 | * to avoid strange results if bits set above. | |
252 | */ | |
cc0bad75 | 253 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
254 | switch (le32_to_cpu(info->Type)) { |
255 | case UNIX_FILE: | |
cc0bad75 JL |
256 | fattr->cf_mode |= S_IFREG; |
257 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
258 | break; |
259 | case UNIX_SYMLINK: | |
cc0bad75 JL |
260 | fattr->cf_mode |= S_IFLNK; |
261 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
262 | break; |
263 | case UNIX_DIR: | |
cc0bad75 JL |
264 | fattr->cf_mode |= S_IFDIR; |
265 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
266 | break; |
267 | case UNIX_CHARDEV: | |
cc0bad75 JL |
268 | fattr->cf_mode |= S_IFCHR; |
269 | fattr->cf_dtype = DT_CHR; | |
270 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
271 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
272 | break; |
273 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
274 | fattr->cf_mode |= S_IFBLK; |
275 | fattr->cf_dtype = DT_BLK; | |
276 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
277 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
278 | break; |
279 | case UNIX_FIFO: | |
cc0bad75 JL |
280 | fattr->cf_mode |= S_IFIFO; |
281 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
282 | break; |
283 | case UNIX_SOCKET: | |
cc0bad75 JL |
284 | fattr->cf_mode |= S_IFSOCK; |
285 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
286 | break; |
287 | default: | |
288 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
289 | fattr->cf_mode |= S_IFREG; |
290 | fattr->cf_dtype = DT_REG; | |
f96637be | 291 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
292 | break; |
293 | } | |
294 | ||
46bbc25f EB |
295 | fattr->cf_uid = cifs_sb->mnt_uid; |
296 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { | |
297 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
298 | if (id < ((uid_t)-1)) { |
299 | kuid_t uid = make_kuid(&init_user_ns, id); | |
300 | if (uid_valid(uid)) | |
301 | fattr->cf_uid = uid; | |
302 | } | |
46bbc25f EB |
303 | } |
304 | ||
305 | fattr->cf_gid = cifs_sb->mnt_gid; | |
306 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { | |
307 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
308 | if (id < ((gid_t)-1)) { |
309 | kgid_t gid = make_kgid(&init_user_ns, id); | |
310 | if (gid_valid(gid)) | |
311 | fattr->cf_gid = gid; | |
312 | } | |
46bbc25f | 313 | } |
75f12983 | 314 | |
cc0bad75 | 315 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
316 | } |
317 | ||
b9a3260f | 318 | /* |
cc0bad75 JL |
319 | * Fill a cifs_fattr struct with fake inode info. |
320 | * | |
321 | * Needed to setup cifs_fattr data for the directory which is the | |
322 | * junction to the new submount (ie to setup the fake directory | |
323 | * which represents a DFS referral). | |
b9a3260f | 324 | */ |
f1230c97 | 325 | static void |
cc0bad75 | 326 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 327 | { |
cc0bad75 | 328 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 329 | |
f96637be | 330 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
331 | |
332 | memset(fattr, 0, sizeof(*fattr)); | |
333 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
334 | fattr->cf_uid = cifs_sb->mnt_uid; | |
335 | fattr->cf_gid = cifs_sb->mnt_gid; | |
918c9009 | 336 | ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
e37fea58 | 337 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
cc0bad75 | 338 | fattr->cf_nlink = 2; |
97aa495a | 339 | fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
0e4bbde9 SF |
340 | } |
341 | ||
4ad65044 PS |
342 | static int |
343 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
344 | { |
345 | int rc; | |
6d5786a3 | 346 | unsigned int xid; |
abab095d JL |
347 | FILE_UNIX_BASIC_INFO find_data; |
348 | struct cifs_fattr fattr; | |
496ad9aa | 349 | struct inode *inode = file_inode(filp); |
abab095d | 350 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 351 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 352 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 353 | |
6d5786a3 | 354 | xid = get_xid(); |
4b4de76e | 355 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
356 | if (!rc) { |
357 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
358 | } else if (rc == -EREMOTE) { | |
359 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
360 | rc = 0; | |
361 | } | |
362 | ||
363 | cifs_fattr_to_inode(inode, &fattr); | |
6d5786a3 | 364 | free_xid(xid); |
abab095d JL |
365 | return rc; |
366 | } | |
367 | ||
1da177e4 | 368 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 369 | const unsigned char *full_path, |
6d5786a3 | 370 | struct super_block *sb, unsigned int xid) |
1da177e4 | 371 | { |
cc0bad75 | 372 | int rc; |
0e4bbde9 | 373 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 374 | struct cifs_fattr fattr; |
96daf2b0 | 375 | struct cifs_tcon *tcon; |
7ffec372 | 376 | struct tcon_link *tlink; |
1da177e4 | 377 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 378 | |
f96637be | 379 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 380 | |
7ffec372 JL |
381 | tlink = cifs_sb_tlink(cifs_sb); |
382 | if (IS_ERR(tlink)) | |
383 | return PTR_ERR(tlink); | |
384 | tcon = tlink_tcon(tlink); | |
385 | ||
1da177e4 | 386 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 387 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 388 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 389 | cifs_put_tlink(tlink); |
e911d0cc | 390 | |
cc0bad75 JL |
391 | if (!rc) { |
392 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
393 | } else if (rc == -EREMOTE) { | |
394 | cifs_create_dfs_fattr(&fattr, sb); | |
395 | rc = 0; | |
396 | } else { | |
397 | return rc; | |
398 | } | |
1da177e4 | 399 | |
1b12b9c1 SM |
400 | /* check for Minshall+French symlinks */ |
401 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
402 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
403 | full_path); | |
1b12b9c1 | 404 | if (tmprc) |
cb084b1a | 405 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
406 | } |
407 | ||
0e4bbde9 | 408 | if (*pinode == NULL) { |
cc0bad75 | 409 | /* get new inode */ |
4065c802 | 410 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
411 | *pinode = cifs_iget(sb, &fattr); |
412 | if (!*pinode) | |
0e4bbde9 | 413 | rc = -ENOMEM; |
cc0bad75 JL |
414 | } else { |
415 | /* we already have inode, update it */ | |
7196ac11 NA |
416 | |
417 | /* if uniqueid is different, return error */ | |
418 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
419 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 420 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
421 | rc = -ESTALE; |
422 | goto cgiiu_exit; | |
423 | } | |
424 | ||
425 | /* if filetype is different, return error */ | |
426 | if (unlikely(((*pinode)->i_mode & S_IFMT) != | |
427 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 428 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
429 | rc = -ESTALE; |
430 | goto cgiiu_exit; | |
431 | } | |
432 | ||
cc0bad75 | 433 | cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 434 | } |
1da177e4 | 435 | |
7196ac11 | 436 | cgiiu_exit: |
1da177e4 LT |
437 | return rc; |
438 | } | |
439 | ||
0b8f18e3 | 440 | static int |
0360d605 | 441 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 442 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
443 | { |
444 | int rc; | |
db8b631d | 445 | __u32 oplock; |
7ffec372 | 446 | struct tcon_link *tlink; |
96daf2b0 | 447 | struct cifs_tcon *tcon; |
d81b8a40 PS |
448 | struct cifs_fid fid; |
449 | struct cifs_open_parms oparms; | |
d4ffff1f | 450 | struct cifs_io_parms io_parms; |
86c96b4b | 451 | char buf[24]; |
d6e2f2a4 | 452 | unsigned int bytes_read; |
fb8c4b14 | 453 | char *pbuf; |
0360d605 | 454 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
455 | |
456 | pbuf = buf; | |
457 | ||
0b8f18e3 JL |
458 | fattr->cf_mode &= ~S_IFMT; |
459 | ||
460 | if (fattr->cf_eof == 0) { | |
461 | fattr->cf_mode |= S_IFIFO; | |
462 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 463 | return 0; |
0b8f18e3 JL |
464 | } else if (fattr->cf_eof < 8) { |
465 | fattr->cf_mode |= S_IFREG; | |
466 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
467 | return -EINVAL; /* EOPNOTSUPP? */ |
468 | } | |
50c2f753 | 469 | |
7ffec372 JL |
470 | tlink = cifs_sb_tlink(cifs_sb); |
471 | if (IS_ERR(tlink)) | |
472 | return PTR_ERR(tlink); | |
473 | tcon = tlink_tcon(tlink); | |
474 | ||
d81b8a40 PS |
475 | oparms.tcon = tcon; |
476 | oparms.cifs_sb = cifs_sb; | |
477 | oparms.desired_access = GENERIC_READ; | |
0f060936 | 478 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
479 | oparms.disposition = FILE_OPEN; |
480 | oparms.path = path; | |
481 | oparms.fid = &fid; | |
482 | oparms.reconnect = false; | |
483 | ||
db8b631d SF |
484 | if (tcon->ses->server->oplocks) |
485 | oplock = REQ_OPLOCK; | |
486 | else | |
487 | oplock = 0; | |
488 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 489 | if (rc) { |
db8b631d | 490 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
491 | cifs_put_tlink(tlink); |
492 | return rc; | |
493 | } | |
494 | ||
495 | /* Read header */ | |
d81b8a40 | 496 | io_parms.netfid = fid.netfid; |
0360d605 PS |
497 | io_parms.pid = current->tgid; |
498 | io_parms.tcon = tcon; | |
499 | io_parms.offset = 0; | |
500 | io_parms.length = 24; | |
501 | ||
db8b631d SF |
502 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
503 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
504 | if ((rc == 0) && (bytes_read >= 8)) { |
505 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
506 | cifs_dbg(FYI, "Block device\n"); | |
507 | fattr->cf_mode |= S_IFBLK; | |
508 | fattr->cf_dtype = DT_BLK; | |
509 | if (bytes_read == 24) { | |
510 | /* we have enough to decode dev num */ | |
511 | __u64 mjr; /* major */ | |
512 | __u64 mnr; /* minor */ | |
513 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
514 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
515 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 516 | } |
0360d605 PS |
517 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
518 | cifs_dbg(FYI, "Char device\n"); | |
519 | fattr->cf_mode |= S_IFCHR; | |
520 | fattr->cf_dtype = DT_CHR; | |
521 | if (bytes_read == 24) { | |
522 | /* we have enough to decode dev num */ | |
523 | __u64 mjr; /* major */ | |
524 | __u64 mnr; /* minor */ | |
525 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
526 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
527 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
528 | } | |
529 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
530 | cifs_dbg(FYI, "Symlink\n"); | |
531 | fattr->cf_mode |= S_IFLNK; | |
532 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 533 | } else { |
0360d605 | 534 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 535 | fattr->cf_dtype = DT_REG; |
0360d605 | 536 | rc = -EOPNOTSUPP; |
fb8c4b14 | 537 | } |
0360d605 PS |
538 | } else { |
539 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
540 | fattr->cf_dtype = DT_REG; | |
541 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 542 | } |
db8b631d SF |
543 | |
544 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 545 | cifs_put_tlink(tlink); |
d6e2f2a4 | 546 | return rc; |
d6e2f2a4 SF |
547 | } |
548 | ||
9e294f1c SF |
549 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
550 | ||
0b8f18e3 JL |
551 | /* |
552 | * Fetch mode bits as provided by SFU. | |
553 | * | |
554 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
555 | */ | |
556 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 557 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 558 | { |
3020a1f5 | 559 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
560 | ssize_t rc; |
561 | char ea_value[4]; | |
562 | __u32 mode; | |
7ffec372 | 563 | struct tcon_link *tlink; |
96daf2b0 | 564 | struct cifs_tcon *tcon; |
7ffec372 JL |
565 | |
566 | tlink = cifs_sb_tlink(cifs_sb); | |
567 | if (IS_ERR(tlink)) | |
568 | return PTR_ERR(tlink); | |
569 | tcon = tlink_tcon(tlink); | |
9e294f1c | 570 | |
d979f3b0 SF |
571 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
572 | cifs_put_tlink(tlink); | |
573 | return -EOPNOTSUPP; | |
574 | } | |
575 | ||
576 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
577 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 578 | cifs_sb); |
7ffec372 | 579 | cifs_put_tlink(tlink); |
4523cc30 | 580 | if (rc < 0) |
9e294f1c SF |
581 | return (int)rc; |
582 | else if (rc > 3) { | |
583 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 584 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
585 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
586 | mode, fattr->cf_mode); | |
0b8f18e3 | 587 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 588 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 589 | } |
0b8f18e3 JL |
590 | |
591 | return 0; | |
3020a1f5 SF |
592 | #else |
593 | return -EOPNOTSUPP; | |
594 | #endif | |
9e294f1c SF |
595 | } |
596 | ||
0b8f18e3 | 597 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 598 | static void |
0b8f18e3 | 599 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 600 | struct super_block *sb, bool adjust_tz, |
eb85d94b | 601 | bool symlink) |
b9a3260f | 602 | { |
e37fea58 | 603 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 604 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 605 | |
0b8f18e3 JL |
606 | memset(fattr, 0, sizeof(*fattr)); |
607 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
608 | if (info->DeletePending) | |
609 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
610 | ||
611 | if (info->LastAccessTime) | |
612 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
918c9009 DD |
613 | else |
614 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
0b8f18e3 JL |
615 | |
616 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
617 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
618 | ||
619 | if (adjust_tz) { | |
0d424ad0 JL |
620 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
621 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
622 | } |
623 | ||
624 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
625 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 626 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 627 | |
74d290da | 628 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
eb85d94b PS |
629 | |
630 | if (symlink) { | |
631 | fattr->cf_mode = S_IFLNK; | |
632 | fattr->cf_dtype = DT_LNK; | |
633 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
0b8f18e3 JL |
634 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
635 | fattr->cf_dtype = DT_DIR; | |
6de2ce42 PS |
636 | /* |
637 | * Server can return wrong NumberOfLinks value for directories | |
638 | * when Unix extensions are disabled - fake it. | |
639 | */ | |
74d290da JM |
640 | if (!tcon->unix_ext) |
641 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 JL |
642 | } else { |
643 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
644 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 645 | |
d0c280d2 JL |
646 | /* clear write bits if ATTR_READONLY is set */ |
647 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
648 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 649 | |
74d290da JM |
650 | /* |
651 | * Don't accept zero nlink from non-unix servers unless | |
652 | * delete is pending. Instead mark it as unknown. | |
653 | */ | |
654 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
655 | !info->DeletePending) { | |
656 | cifs_dbg(1, "bogus file nlink value %u\n", | |
6658b9f7 | 657 | fattr->cf_nlink); |
74d290da | 658 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 659 | } |
6de2ce42 | 660 | } |
0b8f18e3 JL |
661 | |
662 | fattr->cf_uid = cifs_sb->mnt_uid; | |
663 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
664 | } |
665 | ||
4ad65044 PS |
666 | static int |
667 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
668 | { |
669 | int rc; | |
6d5786a3 | 670 | unsigned int xid; |
abab095d JL |
671 | FILE_ALL_INFO find_data; |
672 | struct cifs_fattr fattr; | |
496ad9aa | 673 | struct inode *inode = file_inode(filp); |
c21dfb69 | 674 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 675 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
676 | struct TCP_Server_Info *server = tcon->ses->server; |
677 | ||
678 | if (!server->ops->query_file_info) | |
679 | return -ENOSYS; | |
abab095d | 680 | |
6d5786a3 | 681 | xid = get_xid(); |
4ad65044 | 682 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
683 | switch (rc) { |
684 | case 0: | |
e37fea58 | 685 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
eb85d94b | 686 | false); |
42274bb2 PS |
687 | break; |
688 | case -EREMOTE: | |
689 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
690 | rc = 0; | |
691 | break; | |
692 | case -EOPNOTSUPP: | |
693 | case -EINVAL: | |
abab095d JL |
694 | /* |
695 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
696 | * for now, just skip revalidating and mark inode for |
697 | * immediate reval. | |
698 | */ | |
abab095d JL |
699 | rc = 0; |
700 | CIFS_I(inode)->time = 0; | |
42274bb2 | 701 | default: |
abab095d | 702 | goto cgfi_exit; |
42274bb2 | 703 | } |
abab095d JL |
704 | |
705 | /* | |
706 | * don't bother with SFU junk here -- just mark inode as needing | |
707 | * revalidation. | |
708 | */ | |
abab095d JL |
709 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
710 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
711 | cifs_fattr_to_inode(inode, &fattr); | |
712 | cgfi_exit: | |
6d5786a3 | 713 | free_xid(xid); |
abab095d JL |
714 | return rc; |
715 | } | |
716 | ||
7ea884c7 SF |
717 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
718 | static __u64 simple_hashstr(const char *str) | |
719 | { | |
3995bbf5 | 720 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
7ea884c7 SF |
721 | __u64 hash = 0; |
722 | ||
723 | while (*str) | |
724 | hash = (hash + (__u64) *str++) * hash_mult; | |
725 | ||
726 | return hash; | |
727 | } | |
728 | ||
b8f7442b AA |
729 | /** |
730 | * cifs_backup_query_path_info - SMB1 fallback code to get ino | |
731 | * | |
732 | * Fallback code to get file metadata when we don't have access to | |
733 | * @full_path (EACCESS) and have backup creds. | |
734 | * | |
735 | * @data will be set to search info result buffer | |
736 | * @resp_buf will be set to cifs resp buf and needs to be freed with | |
737 | * cifs_buf_release() when done with @data. | |
738 | */ | |
739 | static int | |
740 | cifs_backup_query_path_info(int xid, | |
741 | struct cifs_tcon *tcon, | |
742 | struct super_block *sb, | |
743 | const char *full_path, | |
744 | void **resp_buf, | |
745 | FILE_ALL_INFO **data) | |
746 | { | |
747 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
748 | struct cifs_search_info info = {0}; | |
749 | u16 flags; | |
750 | int rc; | |
751 | ||
752 | *resp_buf = NULL; | |
753 | info.endOfSearch = false; | |
754 | if (tcon->unix_ext) | |
755 | info.info_level = SMB_FIND_FILE_UNIX; | |
756 | else if ((tcon->ses->capabilities & | |
757 | tcon->ses->server->vals->cap_nt_find) == 0) | |
758 | info.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
759 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
760 | info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
761 | else /* no srvino useful for fallback to some netapp */ | |
762 | info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
763 | ||
764 | flags = CIFS_SEARCH_CLOSE_ALWAYS | | |
765 | CIFS_SEARCH_CLOSE_AT_END | | |
766 | CIFS_SEARCH_BACKUP_SEARCH; | |
767 | ||
768 | rc = CIFSFindFirst(xid, tcon, full_path, | |
769 | cifs_sb, NULL, flags, &info, false); | |
770 | if (rc) | |
771 | return rc; | |
772 | ||
773 | *resp_buf = (void *)info.ntwrk_buf_start; | |
774 | *data = (FILE_ALL_INFO *)info.srch_entries_start; | |
775 | return 0; | |
776 | } | |
777 | ||
778 | static void | |
779 | cifs_set_fattr_ino(int xid, | |
780 | struct cifs_tcon *tcon, | |
781 | struct super_block *sb, | |
782 | struct inode **inode, | |
783 | const char *full_path, | |
784 | FILE_ALL_INFO *data, | |
785 | struct cifs_fattr *fattr) | |
786 | { | |
787 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
788 | struct TCP_Server_Info *server = tcon->ses->server; | |
789 | int rc; | |
790 | ||
791 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
792 | if (*inode) | |
793 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
794 | else | |
795 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
796 | return; | |
797 | } | |
798 | ||
799 | /* | |
800 | * If we have an inode pass a NULL tcon to ensure we don't | |
801 | * make a round trip to the server. This only works for SMB2+. | |
802 | */ | |
803 | rc = server->ops->get_srv_inum(xid, | |
804 | *inode ? NULL : tcon, | |
805 | cifs_sb, full_path, | |
806 | &fattr->cf_uniqueid, | |
807 | data); | |
808 | if (rc) { | |
809 | /* | |
810 | * If that fails reuse existing ino or generate one | |
811 | * and disable server ones | |
812 | */ | |
813 | if (*inode) | |
814 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
815 | else { | |
816 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
817 | cifs_autodisable_serverino(cifs_sb); | |
818 | } | |
819 | return; | |
820 | } | |
821 | ||
822 | /* If no errors, check for zero root inode (invalid) */ | |
823 | if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { | |
824 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
825 | if (*inode) { | |
826 | /* reuse */ | |
827 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
828 | } else { | |
829 | /* make an ino by hashing the UNC */ | |
830 | fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; | |
831 | fattr->cf_uniqueid = simple_hashstr(tcon->treeName); | |
832 | } | |
833 | } | |
834 | } | |
835 | ||
836 | static inline bool is_inode_cache_good(struct inode *ino) | |
837 | { | |
838 | return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; | |
839 | } | |
840 | ||
1208ef1f | 841 | int |
b8f7442b AA |
842 | cifs_get_inode_info(struct inode **inode, |
843 | const char *full_path, | |
844 | FILE_ALL_INFO *in_data, | |
845 | struct super_block *sb, int xid, | |
42eacf9e | 846 | const struct cifs_fid *fid) |
1da177e4 | 847 | { |
b8f7442b | 848 | |
1208ef1f PS |
849 | struct cifs_tcon *tcon; |
850 | struct TCP_Server_Info *server; | |
7ffec372 | 851 | struct tcon_link *tlink; |
1da177e4 | 852 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1208ef1f | 853 | bool adjust_tz = false; |
b8f7442b | 854 | struct cifs_fattr fattr = {0}; |
eb85d94b | 855 | bool symlink = false; |
b8f7442b AA |
856 | FILE_ALL_INFO *data = in_data; |
857 | FILE_ALL_INFO *tmp_data = NULL; | |
858 | void *smb1_backup_rsp_buf = NULL; | |
859 | int rc = 0; | |
860 | int tmprc = 0; | |
1da177e4 | 861 | |
7ffec372 JL |
862 | tlink = cifs_sb_tlink(cifs_sb); |
863 | if (IS_ERR(tlink)) | |
864 | return PTR_ERR(tlink); | |
1208ef1f PS |
865 | tcon = tlink_tcon(tlink); |
866 | server = tcon->ses->server; | |
7ffec372 | 867 | |
b8f7442b AA |
868 | /* |
869 | * 1. Fetch file metadata if not provided (data) | |
870 | */ | |
1da177e4 | 871 | |
b8f7442b AA |
872 | if (!data) { |
873 | if (is_inode_cache_good(*inode)) { | |
f96637be | 874 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
b8f7442b | 875 | goto out; |
1da177e4 | 876 | } |
b8f7442b AA |
877 | tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
878 | if (!tmp_data) { | |
7ffec372 | 879 | rc = -ENOMEM; |
b8f7442b | 880 | goto out; |
7ffec372 | 881 | } |
b8f7442b AA |
882 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
883 | full_path, tmp_data, | |
884 | &adjust_tz, &symlink); | |
885 | data = tmp_data; | |
1da177e4 | 886 | } |
0b8f18e3 | 887 | |
b8f7442b AA |
888 | /* |
889 | * 2. Convert it to internal cifs metadata (fattr) | |
890 | */ | |
891 | ||
892 | switch (rc) { | |
893 | case 0: | |
894 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); | |
895 | break; | |
896 | case -EREMOTE: | |
897 | /* DFS link, no metadata available on this server */ | |
0b8f18e3 | 898 | cifs_create_dfs_fattr(&fattr, sb); |
b9a3260f | 899 | rc = 0; |
b8f7442b AA |
900 | break; |
901 | case -EACCES: | |
3b7960ca | 902 | /* |
b8f7442b AA |
903 | * perm errors, try again with backup flags if possible |
904 | * | |
905 | * For SMB2 and later the backup intent flag | |
906 | * is already sent if needed on open and there | |
907 | * is no path based FindFirst operation to use | |
908 | * to retry with | |
3b7960ca | 909 | */ |
b8f7442b AA |
910 | if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
911 | /* for easier reading */ | |
912 | FILE_DIRECTORY_INFO *fdi; | |
913 | SEARCH_ID_FULL_DIR_INFO *si; | |
914 | ||
915 | rc = cifs_backup_query_path_info(xid, tcon, sb, | |
916 | full_path, | |
917 | &smb1_backup_rsp_buf, | |
918 | &data); | |
919 | if (rc) | |
920 | goto out; | |
921 | ||
922 | fdi = (FILE_DIRECTORY_INFO *)data; | |
923 | si = (SEARCH_ID_FULL_DIR_INFO *)data; | |
924 | ||
925 | cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); | |
926 | fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); | |
927 | /* uniqueid set, skip get inum step */ | |
928 | goto handle_mnt_opt; | |
929 | } else { | |
930 | /* nothing we can do, bail out */ | |
931 | goto out; | |
3b7960ca | 932 | } |
b8f7442b AA |
933 | break; |
934 | default: | |
935 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
936 | goto out; | |
937 | } | |
c052e2b4 | 938 | |
b8f7442b AA |
939 | /* |
940 | * 3. Get or update inode number (fattr.cf_uniqueid) | |
941 | */ | |
942 | ||
943 | cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); | |
1da177e4 | 944 | |
0b8f18e3 | 945 | /* |
b8f7442b | 946 | * 4. Tweak fattr based on mount options |
0b8f18e3 | 947 | */ |
b9a3260f | 948 | |
b8f7442b | 949 | handle_mnt_opt: |
0b8f18e3 JL |
950 | /* query for SFU type info if supported and needed */ |
951 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
952 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
953 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
954 | if (tmprc) | |
f96637be | 955 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 956 | } |
1da177e4 | 957 | |
b9a3260f | 958 | /* fill in 0777 bits from ACL */ |
e2f8fbfb SF |
959 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
960 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, | |
961 | full_path, fid); | |
962 | if (rc) { | |
963 | cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", | |
b8f7442b AA |
964 | __func__, rc); |
965 | goto out; | |
e2f8fbfb SF |
966 | } |
967 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
968 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, | |
68464b88 DC |
969 | full_path, fid); |
970 | if (rc) { | |
f96637be JP |
971 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
972 | __func__, rc); | |
b8f7442b | 973 | goto out; |
78415d2d | 974 | } |
b9a3260f | 975 | } |
b9a3260f | 976 | |
0b8f18e3 JL |
977 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
978 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
979 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 980 | |
1b12b9c1 SM |
981 | /* check for Minshall+French symlinks */ |
982 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
983 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
984 | full_path); | |
1b12b9c1 | 985 | if (tmprc) |
cb084b1a | 986 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
987 | } |
988 | ||
b8f7442b AA |
989 | /* |
990 | * 5. Update inode with final fattr data | |
991 | */ | |
992 | ||
1208ef1f PS |
993 | if (!*inode) { |
994 | *inode = cifs_iget(sb, &fattr); | |
995 | if (!*inode) | |
0b8f18e3 JL |
996 | rc = -ENOMEM; |
997 | } else { | |
7196ac11 NA |
998 | /* we already have inode, update it */ |
999 | ||
a108471b RL |
1000 | /* if uniqueid is different, return error */ |
1001 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1002 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 1003 | CIFS_I(*inode)->time = 0; /* force reval */ |
a108471b | 1004 | rc = -ESTALE; |
b8f7442b | 1005 | goto out; |
a108471b RL |
1006 | } |
1007 | ||
7196ac11 NA |
1008 | /* if filetype is different, return error */ |
1009 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
1010 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 1011 | CIFS_I(*inode)->time = 0; /* force reval */ |
7196ac11 | 1012 | rc = -ESTALE; |
b8f7442b | 1013 | goto out; |
7196ac11 NA |
1014 | } |
1015 | ||
1208ef1f | 1016 | cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 1017 | } |
b8f7442b AA |
1018 | out: |
1019 | cifs_buf_release(smb1_backup_rsp_buf); | |
7ffec372 | 1020 | cifs_put_tlink(tlink); |
b8f7442b | 1021 | kfree(tmp_data); |
1da177e4 LT |
1022 | return rc; |
1023 | } | |
1024 | ||
7f8ed420 SF |
1025 | static const struct inode_operations cifs_ipc_inode_ops = { |
1026 | .lookup = cifs_lookup, | |
1027 | }; | |
1028 | ||
cc0bad75 JL |
1029 | static int |
1030 | cifs_find_inode(struct inode *inode, void *opaque) | |
1031 | { | |
1032 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1033 | ||
f30b9c11 | 1034 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
1035 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
1036 | return 0; | |
1037 | ||
20054bd6 JL |
1038 | /* use createtime like an i_generation field */ |
1039 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
1040 | return 0; | |
1041 | ||
f30b9c11 JL |
1042 | /* don't match inode of different type */ |
1043 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
1044 | return 0; | |
1045 | ||
5acfec25 | 1046 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 1047 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 1048 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 1049 | |
cc0bad75 JL |
1050 | return 1; |
1051 | } | |
1052 | ||
1053 | static int | |
1054 | cifs_init_inode(struct inode *inode, void *opaque) | |
1055 | { | |
1056 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1057 | ||
1058 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 1059 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
1060 | return 0; |
1061 | } | |
1062 | ||
5acfec25 JL |
1063 | /* |
1064 | * walk dentry list for an inode and report whether it has aliases that | |
1065 | * are hashed. We use this to determine if a directory inode can actually | |
1066 | * be used. | |
1067 | */ | |
1068 | static bool | |
1069 | inode_has_hashed_dentries(struct inode *inode) | |
1070 | { | |
1071 | struct dentry *dentry; | |
1072 | ||
873feea0 | 1073 | spin_lock(&inode->i_lock); |
946e51f2 | 1074 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1075 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1076 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1077 | return true; |
1078 | } | |
1079 | } | |
873feea0 | 1080 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1081 | return false; |
1082 | } | |
1083 | ||
cc0bad75 JL |
1084 | /* Given fattrs, get a corresponding inode */ |
1085 | struct inode * | |
1086 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1087 | { | |
1088 | unsigned long hash; | |
1089 | struct inode *inode; | |
1090 | ||
3d694380 | 1091 | retry_iget5_locked: |
f96637be | 1092 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1093 | |
1094 | /* hash down to 32-bits on 32-bit arch */ | |
1095 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1096 | ||
1097 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1098 | if (inode) { |
5acfec25 | 1099 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1100 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1101 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1102 | |
1103 | if (inode_has_hashed_dentries(inode)) { | |
1104 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1105 | iput(inode); | |
1106 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1107 | goto retry_iget5_locked; | |
1108 | } | |
3d694380 JL |
1109 | } |
1110 | ||
cc0bad75 | 1111 | cifs_fattr_to_inode(inode, fattr); |
1751e8a6 | 1112 | if (sb->s_flags & SB_NOATIME) |
cc0bad75 JL |
1113 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
1114 | if (inode->i_state & I_NEW) { | |
1115 | inode->i_ino = hash; | |
0ccd4802 | 1116 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1117 | /* initialize per-inode cache cookie pointer */ |
1118 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1119 | #endif |
cc0bad75 JL |
1120 | unlock_new_inode(inode); |
1121 | } | |
1122 | } | |
1123 | ||
1124 | return inode; | |
1125 | } | |
1126 | ||
1da177e4 | 1127 | /* gets root inode */ |
9b6763e0 | 1128 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1129 | { |
6d5786a3 | 1130 | unsigned int xid; |
0d424ad0 | 1131 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1132 | struct inode *inode = NULL; |
ce634ab2 | 1133 | long rc; |
96daf2b0 | 1134 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1135 | char *path = NULL; |
1136 | int len; | |
1137 | ||
1138 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1139 | && cifs_sb->prepath) { | |
1140 | len = strlen(cifs_sb->prepath); | |
1141 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1142 | if (path == NULL) | |
1143 | return ERR_PTR(-ENOMEM); | |
1144 | path[0] = '/'; | |
1145 | memcpy(path+1, cifs_sb->prepath, len); | |
1146 | } else { | |
1147 | path = kstrdup("", GFP_KERNEL); | |
1148 | if (path == NULL) | |
1149 | return ERR_PTR(-ENOMEM); | |
1150 | } | |
ce634ab2 | 1151 | |
6d5786a3 | 1152 | xid = get_xid(); |
b5b374ea | 1153 | if (tcon->unix_ext) { |
a6b5058f | 1154 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1155 | /* some servers mistakenly claim POSIX support */ |
1156 | if (rc != -EOPNOTSUPP) | |
1157 | goto iget_no_retry; | |
1158 | cifs_dbg(VFS, "server does not support POSIX extensions"); | |
1159 | tcon->unix_ext = false; | |
1160 | } | |
1161 | ||
a6b5058f AA |
1162 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
1163 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1164 | |
b5b374ea | 1165 | iget_no_retry: |
a7851ce7 OS |
1166 | if (!inode) { |
1167 | inode = ERR_PTR(rc); | |
1168 | goto out; | |
1169 | } | |
cc0bad75 | 1170 | |
0ccd4802 | 1171 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1172 | /* populate tcon->resource_id */ |
0d424ad0 | 1173 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1174 | #endif |
d03382ce | 1175 | |
b327a717 | 1176 | if (rc && tcon->pipe) { |
f96637be | 1177 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1178 | spin_lock(&inode->i_lock); |
7f8ed420 | 1179 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1180 | set_nlink(inode, 2); |
7f8ed420 SF |
1181 | inode->i_op = &cifs_ipc_inode_ops; |
1182 | inode->i_fop = &simple_dir_operations; | |
1183 | inode->i_uid = cifs_sb->mnt_uid; | |
1184 | inode->i_gid = cifs_sb->mnt_gid; | |
b7ca6928 | 1185 | spin_unlock(&inode->i_lock); |
ad661334 | 1186 | } else if (rc) { |
ce634ab2 | 1187 | iget_failed(inode); |
a7851ce7 | 1188 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1189 | } |
1190 | ||
a7851ce7 | 1191 | out: |
a6b5058f | 1192 | kfree(path); |
31cd106b | 1193 | free_xid(xid); |
ce634ab2 | 1194 | return inode; |
1da177e4 LT |
1195 | } |
1196 | ||
ed6875e0 | 1197 | int |
6d5786a3 | 1198 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
ed6875e0 | 1199 | char *full_path, __u32 dosattr) |
388e57b2 | 1200 | { |
388e57b2 | 1201 | bool set_time = false; |
388e57b2 | 1202 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1203 | struct TCP_Server_Info *server; |
388e57b2 SF |
1204 | FILE_BASIC_INFO info_buf; |
1205 | ||
1adcb710 SF |
1206 | if (attrs == NULL) |
1207 | return -EINVAL; | |
1208 | ||
6bdf6dbd PS |
1209 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1210 | if (!server->ops->set_file_info) | |
1211 | return -ENOSYS; | |
1212 | ||
fd09b7d3 SF |
1213 | info_buf.Pad = 0; |
1214 | ||
388e57b2 SF |
1215 | if (attrs->ia_valid & ATTR_ATIME) { |
1216 | set_time = true; | |
1217 | info_buf.LastAccessTime = | |
95390201 | 1218 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
388e57b2 SF |
1219 | } else |
1220 | info_buf.LastAccessTime = 0; | |
1221 | ||
1222 | if (attrs->ia_valid & ATTR_MTIME) { | |
1223 | set_time = true; | |
1224 | info_buf.LastWriteTime = | |
95390201 | 1225 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
388e57b2 SF |
1226 | } else |
1227 | info_buf.LastWriteTime = 0; | |
1228 | ||
1229 | /* | |
1230 | * Samba throws this field away, but windows may actually use it. | |
1231 | * Do not set ctime unless other time stamps are changed explicitly | |
1232 | * (i.e. by utimes()) since we would then have a mix of client and | |
1233 | * server times. | |
1234 | */ | |
1235 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1236 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 | 1237 | info_buf.ChangeTime = |
95390201 | 1238 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
388e57b2 SF |
1239 | } else |
1240 | info_buf.ChangeTime = 0; | |
1241 | ||
1242 | info_buf.CreationTime = 0; /* don't change */ | |
1243 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1244 | ||
6bdf6dbd | 1245 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1246 | } |
1247 | ||
a12a1ac7 | 1248 | /* |
ed6875e0 | 1249 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1250 | * and rename it to a random name that hopefully won't conflict with |
1251 | * anything else. | |
1252 | */ | |
ed6875e0 PS |
1253 | int |
1254 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1255 | const unsigned int xid) | |
a12a1ac7 JL |
1256 | { |
1257 | int oplock = 0; | |
1258 | int rc; | |
d81b8a40 PS |
1259 | struct cifs_fid fid; |
1260 | struct cifs_open_parms oparms; | |
2b0143b5 | 1261 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1262 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1263 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1264 | struct tcon_link *tlink; |
96daf2b0 | 1265 | struct cifs_tcon *tcon; |
3270958b SF |
1266 | __u32 dosattr, origattr; |
1267 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1268 | |
7ffec372 JL |
1269 | tlink = cifs_sb_tlink(cifs_sb); |
1270 | if (IS_ERR(tlink)) | |
1271 | return PTR_ERR(tlink); | |
1272 | tcon = tlink_tcon(tlink); | |
1273 | ||
c483a984 SP |
1274 | /* |
1275 | * We cannot rename the file if the server doesn't support | |
1276 | * CAP_INFOLEVEL_PASSTHRU | |
1277 | */ | |
1278 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1279 | rc = -EBUSY; | |
1280 | goto out; | |
1281 | } | |
1282 | ||
d81b8a40 PS |
1283 | oparms.tcon = tcon; |
1284 | oparms.cifs_sb = cifs_sb; | |
1285 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
0f060936 | 1286 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
1287 | oparms.disposition = FILE_OPEN; |
1288 | oparms.path = full_path; | |
1289 | oparms.fid = &fid; | |
1290 | oparms.reconnect = false; | |
1291 | ||
1292 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1293 | if (rc != 0) |
1294 | goto out; | |
1295 | ||
3270958b SF |
1296 | origattr = cifsInode->cifsAttrs; |
1297 | if (origattr == 0) | |
1298 | origattr |= ATTR_NORMAL; | |
1299 | ||
1300 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1301 | if (dosattr == 0) |
1302 | dosattr |= ATTR_NORMAL; | |
1303 | dosattr |= ATTR_HIDDEN; | |
1304 | ||
3270958b SF |
1305 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1306 | if (dosattr != origattr) { | |
1307 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1308 | if (info_buf == NULL) { | |
1309 | rc = -ENOMEM; | |
1310 | goto out_close; | |
1311 | } | |
1312 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1313 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1314 | current->tgid); |
1315 | /* although we would like to mark the file hidden | |
1316 | if that fails we will still try to rename it */ | |
72d282dc | 1317 | if (!rc) |
3270958b SF |
1318 | cifsInode->cifsAttrs = dosattr; |
1319 | else | |
1320 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1321 | } |
a12a1ac7 | 1322 | |
dd1db2de | 1323 | /* rename the file */ |
d81b8a40 PS |
1324 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1325 | cifs_sb->local_nls, | |
2baa2682 | 1326 | cifs_remap(cifs_sb)); |
3270958b | 1327 | if (rc != 0) { |
47c78f4a | 1328 | rc = -EBUSY; |
3270958b SF |
1329 | goto undo_setattr; |
1330 | } | |
6d22f098 | 1331 | |
3270958b | 1332 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1333 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1334 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1335 | current->tgid); |
1336 | /* | |
1337 | * some samba versions return -ENOENT when we try to set the | |
1338 | * file disposition here. Likely a samba bug, but work around | |
1339 | * it for now. This means that some cifsXXX files may hang | |
1340 | * around after they shouldn't. | |
1341 | * | |
1342 | * BB: remove this hack after more servers have the fix | |
1343 | */ | |
1344 | if (rc == -ENOENT) | |
1345 | rc = 0; | |
1346 | else if (rc != 0) { | |
47c78f4a | 1347 | rc = -EBUSY; |
3270958b SF |
1348 | goto undo_rename; |
1349 | } | |
aff8d5ca | 1350 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1351 | } |
7ce86d5a | 1352 | |
a12a1ac7 | 1353 | out_close: |
d81b8a40 | 1354 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1355 | out: |
3270958b | 1356 | kfree(info_buf); |
7ffec372 | 1357 | cifs_put_tlink(tlink); |
a12a1ac7 | 1358 | return rc; |
3270958b SF |
1359 | |
1360 | /* | |
1361 | * reset everything back to the original state. Don't bother | |
1362 | * dealing with errors here since we can't do anything about | |
1363 | * them anyway. | |
1364 | */ | |
1365 | undo_rename: | |
d81b8a40 | 1366 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1367 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1368 | undo_setattr: |
1369 | if (dosattr != origattr) { | |
1370 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1371 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1372 | current->tgid)) |
1373 | cifsInode->cifsAttrs = origattr; | |
1374 | } | |
1375 | ||
1376 | goto out_close; | |
a12a1ac7 JL |
1377 | } |
1378 | ||
b7ca6928 SF |
1379 | /* copied from fs/nfs/dir.c with small changes */ |
1380 | static void | |
1381 | cifs_drop_nlink(struct inode *inode) | |
1382 | { | |
1383 | spin_lock(&inode->i_lock); | |
1384 | if (inode->i_nlink > 0) | |
1385 | drop_nlink(inode); | |
1386 | spin_unlock(&inode->i_lock); | |
1387 | } | |
ff694527 SF |
1388 | |
1389 | /* | |
2b0143b5 | 1390 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1391 | * is a negative dentry) then we would attempt a standard SMB delete, but |
413d6100 CIK |
1392 | * if that fails we can not attempt the fall back mechanisms on EACCES |
1393 | * but will return the EACCES to the caller. Note that the VFS does not call | |
ff694527 SF |
1394 | * unlink on negative dentries currently. |
1395 | */ | |
5f0319a7 | 1396 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1397 | { |
1398 | int rc = 0; | |
6d5786a3 | 1399 | unsigned int xid; |
1da177e4 | 1400 | char *full_path = NULL; |
2b0143b5 | 1401 | struct inode *inode = d_inode(dentry); |
ff694527 | 1402 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1403 | struct super_block *sb = dir->i_sb; |
1404 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1405 | struct tcon_link *tlink; |
96daf2b0 | 1406 | struct cifs_tcon *tcon; |
ed6875e0 | 1407 | struct TCP_Server_Info *server; |
6050247d SF |
1408 | struct iattr *attrs = NULL; |
1409 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1410 | |
f96637be | 1411 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1412 | |
7ffec372 JL |
1413 | tlink = cifs_sb_tlink(cifs_sb); |
1414 | if (IS_ERR(tlink)) | |
1415 | return PTR_ERR(tlink); | |
1416 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1417 | server = tcon->ses->server; |
7ffec372 | 1418 | |
6d5786a3 | 1419 | xid = get_xid(); |
1da177e4 | 1420 | |
5f0319a7 JL |
1421 | /* Unlink can be called from rename so we can not take the |
1422 | * sb->s_vfs_rename_mutex here */ | |
1423 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1424 | if (full_path == NULL) { |
0f3bc09e | 1425 | rc = -ENOMEM; |
7ffec372 | 1426 | goto unlink_out; |
1da177e4 | 1427 | } |
2d785a50 | 1428 | |
29e20f9c PS |
1429 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1430 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1431 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1432 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1433 | cifs_remap(cifs_sb)); |
f96637be | 1434 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1435 | if ((rc == 0) || (rc == -ENOENT)) |
1436 | goto psx_del_no_retry; | |
1437 | } | |
1da177e4 | 1438 | |
6050247d | 1439 | retry_std_delete: |
ed6875e0 PS |
1440 | if (!server->ops->unlink) { |
1441 | rc = -ENOSYS; | |
1442 | goto psx_del_no_retry; | |
1443 | } | |
1444 | ||
1445 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1446 | |
2d785a50 | 1447 | psx_del_no_retry: |
1da177e4 | 1448 | if (!rc) { |
5f0319a7 | 1449 | if (inode) |
b7ca6928 | 1450 | cifs_drop_nlink(inode); |
1da177e4 | 1451 | } else if (rc == -ENOENT) { |
5f0319a7 | 1452 | d_drop(dentry); |
47c78f4a | 1453 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1454 | if (server->ops->rename_pending_delete) { |
1455 | rc = server->ops->rename_pending_delete(full_path, | |
1456 | dentry, xid); | |
1457 | if (rc == 0) | |
1458 | cifs_drop_nlink(inode); | |
1459 | } | |
ff694527 | 1460 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1461 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1462 | if (attrs == NULL) { | |
1463 | rc = -ENOMEM; | |
1464 | goto out_reval; | |
1da177e4 | 1465 | } |
388e57b2 SF |
1466 | |
1467 | /* try to reset dos attributes */ | |
ff694527 SF |
1468 | cifs_inode = CIFS_I(inode); |
1469 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1470 | if (origattr == 0) |
1471 | origattr |= ATTR_NORMAL; | |
1472 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1473 | if (dosattr == 0) |
1474 | dosattr |= ATTR_NORMAL; | |
1475 | dosattr |= ATTR_HIDDEN; | |
1476 | ||
1477 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1478 | if (rc != 0) |
1479 | goto out_reval; | |
6050247d SF |
1480 | |
1481 | goto retry_std_delete; | |
1da177e4 | 1482 | } |
6050247d SF |
1483 | |
1484 | /* undo the setattr if we errored out and it's needed */ | |
1485 | if (rc != 0 && dosattr != 0) | |
1486 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1487 | ||
388e57b2 | 1488 | out_reval: |
4523cc30 | 1489 | if (inode) { |
ff694527 SF |
1490 | cifs_inode = CIFS_I(inode); |
1491 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1492 | when needed */ |
e37fea58 | 1493 | inode->i_ctime = current_time(inode); |
06bcfedd | 1494 | } |
e37fea58 | 1495 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1496 | cifs_inode = CIFS_I(dir); |
6050247d | 1497 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1498 | unlink_out: |
1da177e4 | 1499 | kfree(full_path); |
6050247d | 1500 | kfree(attrs); |
6d5786a3 | 1501 | free_xid(xid); |
7ffec372 | 1502 | cifs_put_tlink(tlink); |
1da177e4 LT |
1503 | return rc; |
1504 | } | |
1505 | ||
ff691e96 | 1506 | static int |
101b92d9 | 1507 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1508 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1509 | struct cifs_tcon *tcon, const unsigned int xid) | |
1510 | { | |
1511 | int rc = 0; | |
101b92d9 | 1512 | struct inode *inode = NULL; |
ff691e96 PS |
1513 | |
1514 | if (tcon->unix_ext) | |
101b92d9 | 1515 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1516 | xid); |
1517 | else | |
101b92d9 JL |
1518 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1519 | xid, NULL); | |
1520 | ||
ff691e96 PS |
1521 | if (rc) |
1522 | return rc; | |
1523 | ||
ff691e96 PS |
1524 | /* |
1525 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1526 | * from the server or was set bogus. Also, since this is a brand new |
1527 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1528 | */ |
101b92d9 JL |
1529 | if (inode->i_nlink < 2) |
1530 | set_nlink(inode, 2); | |
ff691e96 PS |
1531 | mode &= ~current_umask(); |
1532 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1533 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1534 | mode |= S_ISGID; |
1535 | ||
1536 | if (tcon->unix_ext) { | |
1537 | struct cifs_unix_set_info_args args = { | |
1538 | .mode = mode, | |
1539 | .ctime = NO_CHANGE_64, | |
1540 | .atime = NO_CHANGE_64, | |
1541 | .mtime = NO_CHANGE_64, | |
1542 | .device = 0, | |
1543 | }; | |
1544 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1545 | args.uid = current_fsuid(); |
101b92d9 | 1546 | if (parent->i_mode & S_ISGID) |
49418b2c | 1547 | args.gid = parent->i_gid; |
ff691e96 | 1548 | else |
49418b2c | 1549 | args.gid = current_fsgid(); |
ff691e96 | 1550 | } else { |
49418b2c EB |
1551 | args.uid = INVALID_UID; /* no change */ |
1552 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1553 | } |
1554 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1555 | cifs_sb->local_nls, | |
2baa2682 | 1556 | cifs_remap(cifs_sb)); |
ff691e96 | 1557 | } else { |
f436720e | 1558 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1559 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1560 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1561 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1562 | tcon, xid); |
101b92d9 JL |
1563 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1564 | inode->i_mode = (mode | S_IFDIR); | |
1565 | ||
1566 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1567 | inode->i_uid = current_fsuid(); | |
1568 | if (inode->i_mode & S_ISGID) | |
1569 | inode->i_gid = parent->i_gid; | |
1570 | else | |
1571 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1572 | } |
1573 | } | |
101b92d9 | 1574 | d_instantiate(dentry, inode); |
ff691e96 PS |
1575 | return rc; |
1576 | } | |
1577 | ||
1578 | static int | |
1579 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1580 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1581 | struct cifs_tcon *tcon, const unsigned int xid) | |
1582 | { | |
1583 | int rc = 0; | |
1584 | u32 oplock = 0; | |
1585 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1586 | struct inode *newinode = NULL; | |
1587 | struct cifs_fattr fattr; | |
1588 | ||
1589 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1590 | if (info == NULL) { | |
1591 | rc = -ENOMEM; | |
1592 | goto posix_mkdir_out; | |
1593 | } | |
1594 | ||
1595 | mode &= ~current_umask(); | |
1596 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1597 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1598 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1599 | if (rc == -EOPNOTSUPP) |
1600 | goto posix_mkdir_out; | |
1601 | else if (rc) { | |
f96637be | 1602 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1603 | d_drop(dentry); |
1604 | goto posix_mkdir_out; | |
1605 | } | |
1606 | ||
1607 | if (info->Type == cpu_to_le32(-1)) | |
1608 | /* no return info, go query for it */ | |
1609 | goto posix_mkdir_get_info; | |
1610 | /* | |
1611 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1612 | * need to set uid/gid. | |
1613 | */ | |
1614 | ||
1615 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1616 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1617 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1618 | if (!newinode) | |
1619 | goto posix_mkdir_get_info; | |
1620 | ||
1621 | d_instantiate(dentry, newinode); | |
1622 | ||
1623 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1624 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1625 | dentry, dentry, newinode); | |
ff691e96 PS |
1626 | |
1627 | if (newinode->i_nlink != 2) | |
f96637be JP |
1628 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1629 | newinode->i_nlink); | |
ff691e96 PS |
1630 | #endif |
1631 | ||
1632 | posix_mkdir_out: | |
1633 | kfree(info); | |
1634 | return rc; | |
1635 | posix_mkdir_get_info: | |
1636 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1637 | xid); | |
1638 | goto posix_mkdir_out; | |
1639 | } | |
1640 | ||
18bb1db3 | 1641 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) |
1da177e4 | 1642 | { |
ff691e96 | 1643 | int rc = 0; |
6d5786a3 | 1644 | unsigned int xid; |
1da177e4 | 1645 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1646 | struct tcon_link *tlink; |
29e20f9c | 1647 | struct cifs_tcon *tcon; |
f436720e | 1648 | struct TCP_Server_Info *server; |
ff691e96 | 1649 | char *full_path; |
1da177e4 | 1650 | |
f52aa79d | 1651 | cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
f96637be | 1652 | mode, inode); |
1da177e4 | 1653 | |
1da177e4 | 1654 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
1655 | tlink = cifs_sb_tlink(cifs_sb); |
1656 | if (IS_ERR(tlink)) | |
1657 | return PTR_ERR(tlink); | |
29e20f9c | 1658 | tcon = tlink_tcon(tlink); |
7ffec372 | 1659 | |
6d5786a3 | 1660 | xid = get_xid(); |
1da177e4 | 1661 | |
7f57356b | 1662 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1663 | if (full_path == NULL) { |
0f3bc09e | 1664 | rc = -ENOMEM; |
7ffec372 | 1665 | goto mkdir_out; |
1da177e4 | 1666 | } |
50c2f753 | 1667 | |
bea851b8 SF |
1668 | server = tcon->ses->server; |
1669 | ||
bea851b8 SF |
1670 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
1671 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, | |
1672 | cifs_sb); | |
1673 | d_drop(direntry); /* for time being always refresh inode info */ | |
1674 | goto mkdir_out; | |
1675 | } | |
bea851b8 | 1676 | |
29e20f9c PS |
1677 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1678 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1679 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1680 | tcon, xid); | |
1681 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1682 | goto mkdir_out; |
fb8c4b14 | 1683 | } |
ff691e96 | 1684 | |
f436720e PS |
1685 | if (!server->ops->mkdir) { |
1686 | rc = -ENOSYS; | |
1687 | goto mkdir_out; | |
1688 | } | |
1689 | ||
1da177e4 | 1690 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
c3ca78e2 | 1691 | rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
1da177e4 | 1692 | if (rc) { |
f96637be | 1693 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1694 | d_drop(direntry); |
ff691e96 | 1695 | goto mkdir_out; |
1da177e4 | 1696 | } |
ff691e96 | 1697 | |
c3ca78e2 | 1698 | /* TODO: skip this for smb2/smb3 */ |
ff691e96 PS |
1699 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
1700 | xid); | |
fb8c4b14 | 1701 | mkdir_out: |
6de2ce42 PS |
1702 | /* |
1703 | * Force revalidate to get parent dir info when needed since cached | |
1704 | * attributes are invalid now. | |
1705 | */ | |
1706 | CIFS_I(inode)->time = 0; | |
1da177e4 | 1707 | kfree(full_path); |
6d5786a3 | 1708 | free_xid(xid); |
7ffec372 | 1709 | cifs_put_tlink(tlink); |
1da177e4 LT |
1710 | return rc; |
1711 | } | |
1712 | ||
1713 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1714 | { | |
1715 | int rc = 0; | |
6d5786a3 | 1716 | unsigned int xid; |
1da177e4 | 1717 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1718 | struct tcon_link *tlink; |
f958ca5d PS |
1719 | struct cifs_tcon *tcon; |
1720 | struct TCP_Server_Info *server; | |
1da177e4 LT |
1721 | char *full_path = NULL; |
1722 | struct cifsInodeInfo *cifsInode; | |
1723 | ||
f96637be | 1724 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1725 | |
6d5786a3 | 1726 | xid = get_xid(); |
1da177e4 | 1727 | |
7f57356b | 1728 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1729 | if (full_path == NULL) { |
0f3bc09e | 1730 | rc = -ENOMEM; |
7ffec372 | 1731 | goto rmdir_exit; |
1da177e4 LT |
1732 | } |
1733 | ||
7ffec372 JL |
1734 | cifs_sb = CIFS_SB(inode->i_sb); |
1735 | tlink = cifs_sb_tlink(cifs_sb); | |
1736 | if (IS_ERR(tlink)) { | |
1737 | rc = PTR_ERR(tlink); | |
1738 | goto rmdir_exit; | |
1739 | } | |
f958ca5d PS |
1740 | tcon = tlink_tcon(tlink); |
1741 | server = tcon->ses->server; | |
1742 | ||
1743 | if (!server->ops->rmdir) { | |
1744 | rc = -ENOSYS; | |
1745 | cifs_put_tlink(tlink); | |
1746 | goto rmdir_exit; | |
1747 | } | |
7ffec372 | 1748 | |
f958ca5d | 1749 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1750 | cifs_put_tlink(tlink); |
1da177e4 LT |
1751 | |
1752 | if (!rc) { | |
2b0143b5 DH |
1753 | spin_lock(&d_inode(direntry)->i_lock); |
1754 | i_size_write(d_inode(direntry), 0); | |
1755 | clear_nlink(d_inode(direntry)); | |
1756 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1757 | } |
1758 | ||
2b0143b5 | 1759 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1760 | /* force revalidate to go get info when needed */ |
1761 | cifsInode->time = 0; | |
42c24544 SF |
1762 | |
1763 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1764 | /* |
1765 | * Force revalidate to get parent dir info when needed since cached | |
1766 | * attributes are invalid now. | |
1767 | */ | |
1768 | cifsInode->time = 0; | |
42c24544 | 1769 | |
2b0143b5 | 1770 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 1771 | current_time(inode); |
1da177e4 | 1772 | |
7ffec372 | 1773 | rmdir_exit: |
1da177e4 | 1774 | kfree(full_path); |
6d5786a3 | 1775 | free_xid(xid); |
1da177e4 LT |
1776 | return rc; |
1777 | } | |
1778 | ||
ee2fd967 | 1779 | static int |
8ceb9843 PS |
1780 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
1781 | const char *from_path, struct dentry *to_dentry, | |
1782 | const char *to_path) | |
ee2fd967 SF |
1783 | { |
1784 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 1785 | struct tcon_link *tlink; |
8ceb9843 PS |
1786 | struct cifs_tcon *tcon; |
1787 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
1788 | struct cifs_fid fid; |
1789 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
1790 | int oplock, rc; |
1791 | ||
7ffec372 JL |
1792 | tlink = cifs_sb_tlink(cifs_sb); |
1793 | if (IS_ERR(tlink)) | |
1794 | return PTR_ERR(tlink); | |
8ceb9843 PS |
1795 | tcon = tlink_tcon(tlink); |
1796 | server = tcon->ses->server; | |
1797 | ||
1798 | if (!server->ops->rename) | |
1799 | return -ENOSYS; | |
7ffec372 | 1800 | |
ee2fd967 | 1801 | /* try path-based rename first */ |
8ceb9843 | 1802 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
1803 | |
1804 | /* | |
8ceb9843 PS |
1805 | * Don't bother with rename by filehandle unless file is busy and |
1806 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
1807 | * rename by filehandle to various Windows servers. |
1808 | */ | |
47c78f4a | 1809 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 1810 | goto do_rename_exit; |
ee2fd967 | 1811 | |
652727bb FS |
1812 | /* Don't fall back to using SMB on SMB 2+ mount */ |
1813 | if (server->vals->protocol_id != 0) | |
1814 | goto do_rename_exit; | |
1815 | ||
ed0e3ace JL |
1816 | /* open-file renames don't work across directories */ |
1817 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 1818 | goto do_rename_exit; |
ed0e3ace | 1819 | |
d81b8a40 PS |
1820 | oparms.tcon = tcon; |
1821 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 1822 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 | 1823 | oparms.desired_access = DELETE; |
0f060936 | 1824 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
1825 | oparms.disposition = FILE_OPEN; |
1826 | oparms.path = from_path; | |
1827 | oparms.fid = &fid; | |
1828 | oparms.reconnect = false; | |
1829 | ||
1830 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 1831 | if (rc == 0) { |
d81b8a40 | 1832 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 1833 | (const char *) to_dentry->d_name.name, |
2baa2682 | 1834 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 1835 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 1836 | } |
7ffec372 JL |
1837 | do_rename_exit: |
1838 | cifs_put_tlink(tlink); | |
ee2fd967 SF |
1839 | return rc; |
1840 | } | |
1841 | ||
8ceb9843 | 1842 | int |
7c33d597 MS |
1843 | cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, |
1844 | struct inode *target_dir, struct dentry *target_dentry, | |
1845 | unsigned int flags) | |
1da177e4 | 1846 | { |
8ceb9843 PS |
1847 | char *from_name = NULL; |
1848 | char *to_name = NULL; | |
639e7a91 | 1849 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1850 | struct tcon_link *tlink; |
96daf2b0 | 1851 | struct cifs_tcon *tcon; |
ee2fd967 SF |
1852 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1853 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
1854 | unsigned int xid; |
1855 | int rc, tmprc; | |
1da177e4 | 1856 | |
7c33d597 MS |
1857 | if (flags & ~RENAME_NOREPLACE) |
1858 | return -EINVAL; | |
1859 | ||
639e7a91 | 1860 | cifs_sb = CIFS_SB(source_dir->i_sb); |
7ffec372 JL |
1861 | tlink = cifs_sb_tlink(cifs_sb); |
1862 | if (IS_ERR(tlink)) | |
1863 | return PTR_ERR(tlink); | |
1864 | tcon = tlink_tcon(tlink); | |
1da177e4 | 1865 | |
6d5786a3 | 1866 | xid = get_xid(); |
ee2fd967 | 1867 | |
ee2fd967 SF |
1868 | /* |
1869 | * we already have the rename sem so we do not need to | |
1870 | * grab it again here to protect the path integrity | |
1871 | */ | |
8ceb9843 PS |
1872 | from_name = build_path_from_dentry(source_dentry); |
1873 | if (from_name == NULL) { | |
ee2fd967 SF |
1874 | rc = -ENOMEM; |
1875 | goto cifs_rename_exit; | |
1876 | } | |
1877 | ||
8ceb9843 PS |
1878 | to_name = build_path_from_dentry(target_dentry); |
1879 | if (to_name == NULL) { | |
1da177e4 LT |
1880 | rc = -ENOMEM; |
1881 | goto cifs_rename_exit; | |
1882 | } | |
1883 | ||
8ceb9843 PS |
1884 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
1885 | to_name); | |
ee2fd967 | 1886 | |
7c33d597 MS |
1887 | /* |
1888 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
1889 | */ | |
1890 | if (flags & RENAME_NOREPLACE) | |
1891 | goto cifs_rename_exit; | |
1892 | ||
14121bdc JL |
1893 | if (rc == -EEXIST && tcon->unix_ext) { |
1894 | /* | |
8ceb9843 PS |
1895 | * Are src and dst hardlinks of same inode? We can only tell |
1896 | * with unix extensions enabled. | |
14121bdc JL |
1897 | */ |
1898 | info_buf_source = | |
6da2ec56 | 1899 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
14121bdc JL |
1900 | GFP_KERNEL); |
1901 | if (info_buf_source == NULL) { | |
1902 | rc = -ENOMEM; | |
1903 | goto cifs_rename_exit; | |
1904 | } | |
1905 | ||
1906 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
1907 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
1908 | info_buf_source, | |
1909 | cifs_sb->local_nls, | |
2baa2682 | 1910 | cifs_remap(cifs_sb)); |
8d281efb | 1911 | if (tmprc != 0) |
14121bdc | 1912 | goto unlink_target; |
ee2fd967 | 1913 | |
8ceb9843 PS |
1914 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
1915 | info_buf_target, | |
1916 | cifs_sb->local_nls, | |
2baa2682 | 1917 | cifs_remap(cifs_sb)); |
14121bdc | 1918 | |
8d281efb | 1919 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1920 | info_buf_target->UniqueId)) { |
14121bdc | 1921 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1922 | rc = 0; |
14121bdc | 1923 | goto cifs_rename_exit; |
ae6884a9 | 1924 | } |
8ceb9843 PS |
1925 | } |
1926 | /* | |
1927 | * else ... BB we could add the same check for Windows by | |
1928 | * checking the UniqueId via FILE_INTERNAL_INFO | |
1929 | */ | |
14121bdc | 1930 | |
ee2fd967 | 1931 | unlink_target: |
fc6f3943 | 1932 | /* Try unlinking the target dentry if it's not negative */ |
2b0143b5 | 1933 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { |
a07d3220 PS |
1934 | if (d_is_dir(target_dentry)) |
1935 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
1936 | else | |
1937 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
1938 | if (tmprc) |
1939 | goto cifs_rename_exit; | |
8ceb9843 PS |
1940 | rc = cifs_do_rename(xid, source_dentry, from_name, |
1941 | target_dentry, to_name); | |
1da177e4 LT |
1942 | } |
1943 | ||
b46799a8 PS |
1944 | /* force revalidate to go get info when needed */ |
1945 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
1946 | ||
1947 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 1948 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 1949 | |
1da177e4 | 1950 | cifs_rename_exit: |
ee2fd967 | 1951 | kfree(info_buf_source); |
8ceb9843 PS |
1952 | kfree(from_name); |
1953 | kfree(to_name); | |
6d5786a3 | 1954 | free_xid(xid); |
7ffec372 | 1955 | cifs_put_tlink(tlink); |
1da177e4 LT |
1956 | return rc; |
1957 | } | |
1958 | ||
df2cf170 JL |
1959 | static bool |
1960 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1961 | { |
df2cf170 | 1962 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 1963 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1da177e4 | 1964 | |
57c55cd7 RS |
1965 | if (cifs_i->time == 0) |
1966 | return true; | |
1967 | ||
18cceb6a | 1968 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 1969 | return false; |
1da177e4 | 1970 | |
df2cf170 JL |
1971 | if (!lookupCacheEnabled) |
1972 | return true; | |
1da177e4 | 1973 | |
a87c9ad9 JL |
1974 | if (!cifs_sb->actimeo) |
1975 | return true; | |
1976 | ||
6d20e840 SJ |
1977 | if (!time_in_range(jiffies, cifs_i->time, |
1978 | cifs_i->time + cifs_sb->actimeo)) | |
df2cf170 JL |
1979 | return true; |
1980 | ||
db19272e | 1981 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 1982 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
1983 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
1984 | return true; | |
1985 | ||
df2cf170 JL |
1986 | return false; |
1987 | } | |
1988 | ||
523fb8c8 SJ |
1989 | /* |
1990 | * Zap the cache. Called when invalid_mapping flag is set. | |
1991 | */ | |
6feb9891 | 1992 | int |
df2cf170 JL |
1993 | cifs_invalidate_mapping(struct inode *inode) |
1994 | { | |
6feb9891 | 1995 | int rc = 0; |
df2cf170 | 1996 | |
df2cf170 | 1997 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 1998 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 1999 | if (rc) |
f96637be JP |
2000 | cifs_dbg(VFS, "%s: could not invalidate inode %p\n", |
2001 | __func__, inode); | |
df2cf170 | 2002 | } |
257fb1f1 | 2003 | |
9451a9a5 | 2004 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 2005 | return rc; |
df2cf170 JL |
2006 | } |
2007 | ||
4f73c7d3 JL |
2008 | /** |
2009 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
2010 | * @word: long word containing the bit lock | |
2011 | */ | |
2012 | static int | |
dfd01f02 | 2013 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 2014 | { |
4f73c7d3 | 2015 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
2016 | if (signal_pending_state(mode, current)) |
2017 | return -ERESTARTSYS; | |
4f73c7d3 JL |
2018 | return 0; |
2019 | } | |
2020 | ||
e284e53f JL |
2021 | int |
2022 | cifs_revalidate_mapping(struct inode *inode) | |
2023 | { | |
4f73c7d3 JL |
2024 | int rc; |
2025 | unsigned long *flags = &CIFS_I(inode)->flags; | |
2026 | ||
74316201 N |
2027 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
2028 | TASK_KILLABLE); | |
4f73c7d3 JL |
2029 | if (rc) |
2030 | return rc; | |
2031 | ||
2032 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
2033 | rc = cifs_invalidate_mapping(inode); | |
2034 | if (rc) | |
2035 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
2036 | } | |
2037 | ||
2038 | clear_bit_unlock(CIFS_INO_LOCK, flags); | |
b1cce803 | 2039 | smp_mb__after_atomic(); |
4f73c7d3 JL |
2040 | wake_up_bit(flags, CIFS_INO_LOCK); |
2041 | ||
2042 | return rc; | |
2043 | } | |
2044 | ||
2045 | int | |
2046 | cifs_zap_mapping(struct inode *inode) | |
2047 | { | |
2048 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
2049 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
2050 | } |
2051 | ||
6feb9891 | 2052 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
2053 | { |
2054 | int rc = 0; | |
496ad9aa | 2055 | struct inode *inode = file_inode(filp); |
ba00ba64 | 2056 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d JL |
2057 | |
2058 | if (!cifs_inode_needs_reval(inode)) | |
6feb9891 | 2059 | return rc; |
abab095d | 2060 | |
13cfb733 | 2061 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
2062 | rc = cifs_get_file_info_unix(filp); |
2063 | else | |
2064 | rc = cifs_get_file_info(filp); | |
2065 | ||
abab095d JL |
2066 | return rc; |
2067 | } | |
2068 | ||
6feb9891 | 2069 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 2070 | { |
6d5786a3 | 2071 | unsigned int xid; |
df2cf170 | 2072 | int rc = 0; |
2b0143b5 | 2073 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2074 | struct super_block *sb = dentry->d_sb; |
6feb9891 | 2075 | char *full_path = NULL; |
fc513fac | 2076 | int count = 0; |
df2cf170 JL |
2077 | |
2078 | if (inode == NULL) | |
2079 | return -ENOENT; | |
1da177e4 | 2080 | |
df2cf170 | 2081 | if (!cifs_inode_needs_reval(inode)) |
6feb9891 PS |
2082 | return rc; |
2083 | ||
6d5786a3 | 2084 | xid = get_xid(); |
1da177e4 LT |
2085 | |
2086 | /* can not safely grab the rename sem here if rename calls revalidate | |
2087 | since that would deadlock */ | |
df2cf170 | 2088 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 2089 | if (full_path == NULL) { |
0f3bc09e | 2090 | rc = -ENOMEM; |
6feb9891 | 2091 | goto out; |
1da177e4 LT |
2092 | } |
2093 | ||
f96637be JP |
2094 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2095 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2096 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2097 | |
fc513fac | 2098 | again: |
0d424ad0 | 2099 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) |
df2cf170 JL |
2100 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2101 | else | |
2102 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2103 | xid, NULL); | |
fc513fac RS |
2104 | if (rc == -EAGAIN && count++ < 10) |
2105 | goto again; | |
6feb9891 | 2106 | out: |
1da177e4 | 2107 | kfree(full_path); |
6d5786a3 | 2108 | free_xid(xid); |
fc513fac | 2109 | |
1da177e4 LT |
2110 | return rc; |
2111 | } | |
2112 | ||
6feb9891 PS |
2113 | int cifs_revalidate_file(struct file *filp) |
2114 | { | |
2115 | int rc; | |
496ad9aa | 2116 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2117 | |
2118 | rc = cifs_revalidate_file_attr(filp); | |
2119 | if (rc) | |
2120 | return rc; | |
2121 | ||
e284e53f | 2122 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2123 | } |
2124 | ||
2125 | /* revalidate a dentry's inode attributes */ | |
2126 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2127 | { | |
2128 | int rc; | |
2b0143b5 | 2129 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2130 | |
2131 | rc = cifs_revalidate_dentry_attr(dentry); | |
2132 | if (rc) | |
2133 | return rc; | |
2134 | ||
e284e53f | 2135 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2136 | } |
2137 | ||
a528d35e DH |
2138 | int cifs_getattr(const struct path *path, struct kstat *stat, |
2139 | u32 request_mask, unsigned int flags) | |
1da177e4 | 2140 | { |
a528d35e | 2141 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2142 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2143 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2144 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2145 | int rc; |
3aa1c8c2 | 2146 | |
6feb9891 PS |
2147 | /* |
2148 | * We need to be sure that all dirty pages are written and the server | |
2149 | * has actual ctime, mtime and file length. | |
2150 | */ | |
18cceb6a | 2151 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
6feb9891 PS |
2152 | inode->i_mapping->nrpages != 0) { |
2153 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
2154 | if (rc) { |
2155 | mapping_set_error(inode->i_mapping, rc); | |
2156 | return rc; | |
2157 | } | |
6feb9891 | 2158 | } |
1c456013 | 2159 | |
6feb9891 PS |
2160 | rc = cifs_revalidate_dentry_attr(dentry); |
2161 | if (rc) | |
2162 | return rc; | |
2163 | ||
2164 | generic_fillattr(inode, stat); | |
e8506d25 | 2165 | stat->blksize = cifs_sb->bsize; |
6feb9891 PS |
2166 | stat->ino = CIFS_I(inode)->uniqueid; |
2167 | ||
6e70e26d SF |
2168 | /* old CIFS Unix Extensions doesn't return create time */ |
2169 | if (CIFS_I(inode)->createtime) { | |
2170 | stat->result_mask |= STATX_BTIME; | |
95390201 AB |
2171 | stat->btime = |
2172 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
6e70e26d SF |
2173 | } |
2174 | ||
2175 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2176 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2177 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2178 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2179 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2180 | ||
6feb9891 | 2181 | /* |
d3d1fce1 JL |
2182 | * If on a multiuser mount without unix extensions or cifsacl being |
2183 | * enabled, and the admin hasn't overridden them, set the ownership | |
2184 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2185 | */ |
2186 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2187 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2188 | !tcon->unix_ext) { |
2189 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2190 | stat->uid = current_fsuid(); | |
2191 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2192 | stat->gid = current_fsgid(); | |
5fe14c85 | 2193 | } |
6feb9891 | 2194 | return rc; |
1da177e4 LT |
2195 | } |
2196 | ||
2f3ebaba RS |
2197 | int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
2198 | u64 len) | |
2199 | { | |
2200 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
2201 | struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); | |
2202 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
2203 | struct TCP_Server_Info *server = tcon->ses->server; | |
2204 | struct cifsFileInfo *cfile; | |
2205 | int rc; | |
2206 | ||
2207 | /* | |
2208 | * We need to be sure that all dirty pages are written as they | |
2209 | * might fill holes on the server. | |
2210 | */ | |
2211 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && | |
2212 | inode->i_mapping->nrpages != 0) { | |
2213 | rc = filemap_fdatawait(inode->i_mapping); | |
2214 | if (rc) { | |
2215 | mapping_set_error(inode->i_mapping, rc); | |
2216 | return rc; | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | cfile = find_readable_file(cifs_i, false); | |
2221 | if (cfile == NULL) | |
2222 | return -EINVAL; | |
2223 | ||
2224 | if (server->ops->fiemap) { | |
2225 | rc = server->ops->fiemap(tcon, cfile, fei, start, len); | |
2226 | cifsFileInfo_put(cfile); | |
2227 | return rc; | |
2228 | } | |
2229 | ||
2230 | cifsFileInfo_put(cfile); | |
2231 | return -ENOTSUPP; | |
2232 | } | |
2233 | ||
8bd0d701 | 2234 | int cifs_truncate_page(struct address_space *mapping, loff_t from) |
1da177e4 | 2235 | { |
09cbfeaf KS |
2236 | pgoff_t index = from >> PAGE_SHIFT; |
2237 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2238 | struct page *page; |
1da177e4 LT |
2239 | int rc = 0; |
2240 | ||
2241 | page = grab_cache_page(mapping, index); | |
2242 | if (!page) | |
2243 | return -ENOMEM; | |
2244 | ||
09cbfeaf | 2245 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2246 | unlock_page(page); |
09cbfeaf | 2247 | put_page(page); |
1da177e4 LT |
2248 | return rc; |
2249 | } | |
2250 | ||
8bd0d701 | 2251 | void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2252 | { |
57c55cd7 RS |
2253 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
2254 | ||
ba6a46a0 | 2255 | spin_lock(&inode->i_lock); |
3677db10 | 2256 | i_size_write(inode, offset); |
ba6a46a0 | 2257 | spin_unlock(&inode->i_lock); |
1b947463 | 2258 | |
57c55cd7 RS |
2259 | /* Cached inode must be refreshed on truncate */ |
2260 | cifs_i->time = 0; | |
7caef267 | 2261 | truncate_pagecache(inode, offset); |
3677db10 SF |
2262 | } |
2263 | ||
8efdbde6 JL |
2264 | static int |
2265 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
6d5786a3 | 2266 | unsigned int xid, char *full_path) |
8efdbde6 JL |
2267 | { |
2268 | int rc; | |
2269 | struct cifsFileInfo *open_file; | |
2270 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2271 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2272 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2273 | struct cifs_tcon *tcon = NULL; |
2274 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2275 | |
2276 | /* | |
2277 | * To avoid spurious oplock breaks from server, in the case of | |
2278 | * inodes that we already have open, avoid doing path based | |
2279 | * setting of file size if we can do it by handle. | |
2280 | * This keeps our caching token (oplock) and avoids timeouts | |
2281 | * when the local oplock break takes longer to flush | |
2282 | * writebehind data than the SMB timeout for the SetPathInfo | |
2283 | * request would allow | |
2284 | */ | |
6508d904 | 2285 | open_file = find_writable_file(cifsInode, true); |
8efdbde6 | 2286 | if (open_file) { |
d1433418 PS |
2287 | tcon = tlink_tcon(open_file->tlink); |
2288 | server = tcon->ses->server; | |
2289 | if (server->ops->set_file_size) | |
2290 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2291 | attrs->ia_size, false); | |
2292 | else | |
2293 | rc = -ENOSYS; | |
6ab409b5 | 2294 | cifsFileInfo_put(open_file); |
f96637be | 2295 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2296 | } else |
2297 | rc = -EINVAL; | |
2298 | ||
d1433418 PS |
2299 | if (!rc) |
2300 | goto set_size_out; | |
2301 | ||
2302 | if (tcon == NULL) { | |
2303 | tlink = cifs_sb_tlink(cifs_sb); | |
2304 | if (IS_ERR(tlink)) | |
2305 | return PTR_ERR(tlink); | |
2306 | tcon = tlink_tcon(tlink); | |
2307 | server = tcon->ses->server; | |
2308 | } | |
ba00ba64 | 2309 | |
d1433418 PS |
2310 | /* |
2311 | * Set file size by pathname rather than by handle either because no | |
2312 | * valid, writeable file handle for it was found or because there was | |
2313 | * an error setting it by handle. | |
2314 | */ | |
2315 | if (server->ops->set_path_size) | |
2316 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2317 | attrs->ia_size, cifs_sb, false); | |
2318 | else | |
2319 | rc = -ENOSYS; | |
f96637be | 2320 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2321 | |
d1433418 PS |
2322 | if (tlink) |
2323 | cifs_put_tlink(tlink); | |
8efdbde6 | 2324 | |
d1433418 | 2325 | set_size_out: |
8efdbde6 | 2326 | if (rc == 0) { |
fbec9ab9 | 2327 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2328 | cifs_setsize(inode, attrs->ia_size); |
8efdbde6 JL |
2329 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2330 | } | |
2331 | ||
2332 | return rc; | |
2333 | } | |
2334 | ||
3fe5c1dd JL |
2335 | static int |
2336 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2337 | { | |
2338 | int rc; | |
6d5786a3 | 2339 | unsigned int xid; |
3fe5c1dd | 2340 | char *full_path = NULL; |
2b0143b5 | 2341 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2342 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2343 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2344 | struct tcon_link *tlink; |
96daf2b0 | 2345 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2346 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2347 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2348 | |
35c265e0 AV |
2349 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2350 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2351 | |
6d5786a3 | 2352 | xid = get_xid(); |
3fe5c1dd | 2353 | |
db78b877 CH |
2354 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2355 | attrs->ia_valid |= ATTR_FORCE; | |
2356 | ||
31051c85 | 2357 | rc = setattr_prepare(direntry, attrs); |
db78b877 CH |
2358 | if (rc < 0) |
2359 | goto out; | |
3fe5c1dd JL |
2360 | |
2361 | full_path = build_path_from_dentry(direntry); | |
2362 | if (full_path == NULL) { | |
2363 | rc = -ENOMEM; | |
2364 | goto out; | |
2365 | } | |
2366 | ||
0f4d634c JL |
2367 | /* |
2368 | * Attempt to flush data before changing attributes. We need to do | |
2369 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2370 | * ownership or mode then we may also need to do this. Here, we take | |
2371 | * the safe way out and just do the flush on all setattr requests. If | |
2372 | * the flush returns error, store it to report later and continue. | |
2373 | * | |
2374 | * BB: This should be smarter. Why bother flushing pages that | |
2375 | * will be truncated anyway? Also, should we error out here if | |
2376 | * the flush returns error? | |
2377 | */ | |
2378 | rc = filemap_write_and_wait(inode->i_mapping); | |
9a66396f PS |
2379 | if (is_interrupt_error(rc)) { |
2380 | rc = -ERESTARTSYS; | |
2381 | goto out; | |
2382 | } | |
2383 | ||
eb4b756b JL |
2384 | mapping_set_error(inode->i_mapping, rc); |
2385 | rc = 0; | |
3fe5c1dd JL |
2386 | |
2387 | if (attrs->ia_valid & ATTR_SIZE) { | |
2388 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2389 | if (rc != 0) | |
2390 | goto out; | |
2391 | } | |
2392 | ||
2393 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2394 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2395 | attrs->ia_valid &= ~ATTR_MODE; | |
2396 | ||
2397 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2398 | if (args == NULL) { | |
2399 | rc = -ENOMEM; | |
2400 | goto out; | |
2401 | } | |
2402 | ||
2403 | /* set up the struct */ | |
2404 | if (attrs->ia_valid & ATTR_MODE) | |
2405 | args->mode = attrs->ia_mode; | |
2406 | else | |
2407 | args->mode = NO_CHANGE_64; | |
2408 | ||
2409 | if (attrs->ia_valid & ATTR_UID) | |
2410 | args->uid = attrs->ia_uid; | |
2411 | else | |
49418b2c | 2412 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2413 | |
2414 | if (attrs->ia_valid & ATTR_GID) | |
2415 | args->gid = attrs->ia_gid; | |
2416 | else | |
49418b2c | 2417 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2418 | |
2419 | if (attrs->ia_valid & ATTR_ATIME) | |
95390201 | 2420 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
3fe5c1dd JL |
2421 | else |
2422 | args->atime = NO_CHANGE_64; | |
2423 | ||
2424 | if (attrs->ia_valid & ATTR_MTIME) | |
95390201 | 2425 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
3fe5c1dd JL |
2426 | else |
2427 | args->mtime = NO_CHANGE_64; | |
2428 | ||
2429 | if (attrs->ia_valid & ATTR_CTIME) | |
95390201 | 2430 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
3fe5c1dd JL |
2431 | else |
2432 | args->ctime = NO_CHANGE_64; | |
2433 | ||
2434 | args->device = 0; | |
6508d904 | 2435 | open_file = find_writable_file(cifsInode, true); |
3bbeeb3c | 2436 | if (open_file) { |
4b4de76e | 2437 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2438 | u32 npid = open_file->pid; |
13cfb733 | 2439 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2440 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2441 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2442 | } else { |
7ffec372 JL |
2443 | tlink = cifs_sb_tlink(cifs_sb); |
2444 | if (IS_ERR(tlink)) { | |
2445 | rc = PTR_ERR(tlink); | |
2446 | goto out; | |
2447 | } | |
2448 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2449 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2450 | cifs_sb->local_nls, |
bc8ebdc4 | 2451 | cifs_remap(cifs_sb)); |
7ffec372 | 2452 | cifs_put_tlink(tlink); |
3bbeeb3c | 2453 | } |
3fe5c1dd | 2454 | |
1025774c CH |
2455 | if (rc) |
2456 | goto out; | |
ccd4bb1b | 2457 | |
1025774c | 2458 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2459 | attrs->ia_size != i_size_read(inode)) |
2460 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2461 | |
2462 | setattr_copy(inode, attrs); | |
2463 | mark_inode_dirty(inode); | |
2464 | ||
2465 | /* force revalidate when any of these times are set since some | |
2466 | of the fs types (eg ext3, fat) do not have fine enough | |
2467 | time granularity to match protocol, and we do not have a | |
2468 | a way (yet) to query the server fs's time granularity (and | |
2469 | whether it rounds times down). | |
2470 | */ | |
2471 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2472 | cifsInode->time = 0; | |
3fe5c1dd JL |
2473 | out: |
2474 | kfree(args); | |
2475 | kfree(full_path); | |
6d5786a3 | 2476 | free_xid(xid); |
3fe5c1dd JL |
2477 | return rc; |
2478 | } | |
2479 | ||
0510eeb7 JL |
2480 | static int |
2481 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2482 | { |
6d5786a3 | 2483 | unsigned int xid; |
8abf2775 EB |
2484 | kuid_t uid = INVALID_UID; |
2485 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2486 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2487 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2488 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
aa081859 RS |
2489 | struct cifsFileInfo *wfile; |
2490 | struct cifs_tcon *tcon; | |
1da177e4 LT |
2491 | char *full_path = NULL; |
2492 | int rc = -EACCES; | |
feb3e20c | 2493 | __u32 dosattr = 0; |
4e1e7fb9 | 2494 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2495 | |
6d5786a3 | 2496 | xid = get_xid(); |
1da177e4 | 2497 | |
63d614a6 | 2498 | cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
35c265e0 | 2499 | direntry, attrs->ia_valid); |
6473a559 | 2500 | |
db78b877 CH |
2501 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2502 | attrs->ia_valid |= ATTR_FORCE; | |
2503 | ||
31051c85 | 2504 | rc = setattr_prepare(direntry, attrs); |
db78b877 | 2505 | if (rc < 0) { |
6d5786a3 | 2506 | free_xid(xid); |
db78b877 | 2507 | return rc; |
6473a559 | 2508 | } |
50c2f753 | 2509 | |
7f57356b | 2510 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 2511 | if (full_path == NULL) { |
0f3bc09e | 2512 | rc = -ENOMEM; |
6d5786a3 | 2513 | free_xid(xid); |
0f3bc09e | 2514 | return rc; |
1da177e4 | 2515 | } |
1da177e4 | 2516 | |
0f4d634c JL |
2517 | /* |
2518 | * Attempt to flush data before changing attributes. We need to do | |
2519 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2520 | * ownership or mode then we may also need to do this. Here, we take | |
2521 | * the safe way out and just do the flush on all setattr requests. If | |
2522 | * the flush returns error, store it to report later and continue. | |
2523 | * | |
2524 | * BB: This should be smarter. Why bother flushing pages that | |
2525 | * will be truncated anyway? Also, should we error out here if | |
2526 | * the flush returns error? | |
2527 | */ | |
2528 | rc = filemap_write_and_wait(inode->i_mapping); | |
9a66396f PS |
2529 | if (is_interrupt_error(rc)) { |
2530 | rc = -ERESTARTSYS; | |
2531 | goto cifs_setattr_exit; | |
2532 | } | |
2533 | ||
eb4b756b JL |
2534 | mapping_set_error(inode->i_mapping, rc); |
2535 | rc = 0; | |
cea21805 | 2536 | |
aa081859 RS |
2537 | if (attrs->ia_valid & ATTR_MTIME) { |
2538 | rc = cifs_get_writable_file(cifsInode, false, &wfile); | |
2539 | if (!rc) { | |
2540 | tcon = tlink_tcon(wfile->tlink); | |
2541 | rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); | |
2542 | cifsFileInfo_put(wfile); | |
2543 | if (rc) | |
783bf7b8 | 2544 | goto cifs_setattr_exit; |
aa081859 | 2545 | } else if (rc != -EBADF) |
783bf7b8 | 2546 | goto cifs_setattr_exit; |
aa081859 RS |
2547 | else |
2548 | rc = 0; | |
2549 | } | |
2550 | ||
50531444 | 2551 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2552 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2553 | if (rc != 0) | |
e30dcf3a | 2554 | goto cifs_setattr_exit; |
1da177e4 | 2555 | } |
4ca691a8 | 2556 | |
a5ff3769 SP |
2557 | if (attrs->ia_valid & ATTR_UID) |
2558 | uid = attrs->ia_uid; | |
2559 | ||
2560 | if (attrs->ia_valid & ATTR_GID) | |
2561 | gid = attrs->ia_gid; | |
2562 | ||
22442179 SF |
2563 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2564 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
8abf2775 | 2565 | if (uid_valid(uid) || gid_valid(gid)) { |
a5ff3769 SP |
2566 | rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, |
2567 | uid, gid); | |
2568 | if (rc) { | |
f96637be JP |
2569 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2570 | __func__, rc); | |
a5ff3769 SP |
2571 | goto cifs_setattr_exit; |
2572 | } | |
2573 | } | |
2574 | } else | |
3fe5c1dd | 2575 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2576 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2577 | |
d32c4f26 JL |
2578 | /* skip mode change if it's just for clearing setuid/setgid */ |
2579 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2580 | attrs->ia_valid &= ~ATTR_MODE; | |
2581 | ||
1da177e4 | 2582 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2583 | mode = attrs->ia_mode; |
cdbce9c8 | 2584 | rc = 0; |
22442179 SF |
2585 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2586 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
a5ff3769 | 2587 | rc = id_mode_to_cifs_acl(inode, full_path, mode, |
8abf2775 | 2588 | INVALID_UID, INVALID_GID); |
78415d2d | 2589 | if (rc) { |
f96637be JP |
2590 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2591 | __func__, rc); | |
78415d2d SP |
2592 | goto cifs_setattr_exit; |
2593 | } | |
2594 | } else | |
5132861a JL |
2595 | if (((mode & S_IWUGO) == 0) && |
2596 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2597 | |
2598 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2599 | ||
5132861a JL |
2600 | /* fix up mode if we're not using dynperm */ |
2601 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2602 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2603 | } else if ((mode & S_IWUGO) && | |
2604 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2605 | |
2606 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2607 | /* Attributes of 0 are ignored */ | |
2608 | if (dosattr == 0) | |
2609 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2610 | |
2611 | /* reset local inode permissions to normal */ | |
2612 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2613 | attrs->ia_mode &= ~(S_IALLUGO); | |
2614 | if (S_ISDIR(inode->i_mode)) | |
2615 | attrs->ia_mode |= | |
2616 | cifs_sb->mnt_dir_mode; | |
2617 | else | |
2618 | attrs->ia_mode |= | |
2619 | cifs_sb->mnt_file_mode; | |
2620 | } | |
2621 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2622 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2623 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2624 | } |
1da177e4 LT |
2625 | } |
2626 | ||
feb3e20c JL |
2627 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2628 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2629 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2630 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2631 | |
e30dcf3a SF |
2632 | /* Even if error on time set, no sense failing the call if |
2633 | the server would set the time to a reasonable value anyway, | |
2634 | and this check ensures that we are not being called from | |
2635 | sys_utimes in which case we ought to fail the call back to | |
2636 | the user when the server rejects the call */ | |
fb8c4b14 | 2637 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2638 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2639 | rc = 0; |
1da177e4 LT |
2640 | } |
2641 | ||
2642 | /* do not need local check to inode_check_ok since the server does | |
2643 | that */ | |
1025774c CH |
2644 | if (rc) |
2645 | goto cifs_setattr_exit; | |
2646 | ||
2647 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2648 | attrs->ia_size != i_size_read(inode)) |
2649 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2650 | |
2651 | setattr_copy(inode, attrs); | |
2652 | mark_inode_dirty(inode); | |
1025774c | 2653 | |
e30dcf3a | 2654 | cifs_setattr_exit: |
1da177e4 | 2655 | kfree(full_path); |
6d5786a3 | 2656 | free_xid(xid); |
1da177e4 LT |
2657 | return rc; |
2658 | } | |
2659 | ||
0510eeb7 JL |
2660 | int |
2661 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2662 | { | |
fc64005c | 2663 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2664 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
0510eeb7 JL |
2665 | |
2666 | if (pTcon->unix_ext) | |
2667 | return cifs_setattr_unix(direntry, attrs); | |
2668 | ||
2669 | return cifs_setattr_nounix(direntry, attrs); | |
2670 | ||
2671 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2672 | } | |
2673 | ||
99ee4dbd | 2674 | #if 0 |
1da177e4 LT |
2675 | void cifs_delete_inode(struct inode *inode) |
2676 | { | |
f96637be | 2677 | cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode); |
1da177e4 LT |
2678 | /* may have to add back in if and when safe distributed caching of |
2679 | directories added e.g. via FindNotify */ | |
2680 | } | |
99ee4dbd | 2681 | #endif |