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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 */ | |
116 | if (timespec_equal(&inode->i_mtime, &fattr->cf_mtime) && | |
117 | cifs_i->server_eof == fattr->cf_eof) { | |
f96637be JP |
118 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
119 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
120 | return; |
121 | } | |
122 | ||
f96637be JP |
123 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
124 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 125 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
126 | } |
127 | ||
74d290da JM |
128 | /* |
129 | * copy nlink to the inode, unless it wasn't provided. Provide | |
130 | * sane values if we don't have an existing one and none was provided | |
131 | */ | |
132 | static void | |
133 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
134 | { | |
135 | /* | |
136 | * if we're in a situation where we can't trust what we | |
137 | * got from the server (readdir, some non-unix cases) | |
138 | * fake reasonable values | |
139 | */ | |
140 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
141 | /* only provide fake values on a new inode */ | |
142 | if (inode->i_state & I_NEW) { | |
143 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
144 | set_nlink(inode, 2); | |
145 | else | |
146 | set_nlink(inode, 1); | |
147 | } | |
148 | return; | |
149 | } | |
150 | ||
151 | /* we trust the server, so update it */ | |
152 | set_nlink(inode, fattr->cf_nlink); | |
153 | } | |
154 | ||
cc0bad75 JL |
155 | /* populate an inode with info from a cifs_fattr struct */ |
156 | void | |
157 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 158 | { |
cc0bad75 | 159 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 160 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 161 | |
df2cf170 JL |
162 | cifs_revalidate_cache(inode, fattr); |
163 | ||
b7ca6928 | 164 | spin_lock(&inode->i_lock); |
cc0bad75 JL |
165 | inode->i_atime = fattr->cf_atime; |
166 | inode->i_mtime = fattr->cf_mtime; | |
167 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 168 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 169 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
170 | inode->i_uid = fattr->cf_uid; |
171 | inode->i_gid = fattr->cf_gid; | |
172 | ||
0b8f18e3 JL |
173 | /* if dynperm is set, don't clobber existing mode */ |
174 | if (inode->i_state & I_NEW || | |
175 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
176 | inode->i_mode = fattr->cf_mode; | |
177 | ||
cc0bad75 | 178 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 179 | |
0b8f18e3 JL |
180 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
181 | cifs_i->time = 0; | |
182 | else | |
183 | cifs_i->time = jiffies; | |
184 | ||
aff8d5ca JL |
185 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
186 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
187 | else | |
188 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 189 | |
835a36ca | 190 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
191 | /* |
192 | * Can't safely change the file size here if the client is writing to | |
193 | * it due to potential races. | |
194 | */ | |
cc0bad75 JL |
195 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
196 | i_size_write(inode, fattr->cf_eof); | |
197 | ||
198 | /* | |
199 | * i_blocks is not related to (i_size / i_blksize), | |
200 | * but instead 512 byte (2**9) size is required for | |
201 | * calculating num blocks. | |
202 | */ | |
203 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
204 | } | |
205 | spin_unlock(&inode->i_lock); | |
206 | ||
01c64fea DH |
207 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
208 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
209 | if (inode->i_state & I_NEW) |
210 | cifs_set_ops(inode); | |
cc0bad75 JL |
211 | } |
212 | ||
4065c802 JL |
213 | void |
214 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
215 | { | |
216 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
217 | ||
218 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
219 | return; | |
220 | ||
221 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
222 | } | |
223 | ||
cc0bad75 JL |
224 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
225 | void | |
226 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
227 | struct cifs_sb_info *cifs_sb) | |
228 | { | |
229 | memset(fattr, 0, sizeof(*fattr)); | |
230 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
231 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
232 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
233 | ||
234 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
235 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
236 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
237 | /* old POSIX extensions don't get create time */ |
238 | ||
cc0bad75 | 239 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
240 | |
241 | /* | |
242 | * Since we set the inode type below we need to mask off | |
243 | * to avoid strange results if bits set above. | |
244 | */ | |
cc0bad75 | 245 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
246 | switch (le32_to_cpu(info->Type)) { |
247 | case UNIX_FILE: | |
cc0bad75 JL |
248 | fattr->cf_mode |= S_IFREG; |
249 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
250 | break; |
251 | case UNIX_SYMLINK: | |
cc0bad75 JL |
252 | fattr->cf_mode |= S_IFLNK; |
253 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
254 | break; |
255 | case UNIX_DIR: | |
cc0bad75 JL |
256 | fattr->cf_mode |= S_IFDIR; |
257 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
258 | break; |
259 | case UNIX_CHARDEV: | |
cc0bad75 JL |
260 | fattr->cf_mode |= S_IFCHR; |
261 | fattr->cf_dtype = DT_CHR; | |
262 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
263 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
264 | break; |
265 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
266 | fattr->cf_mode |= S_IFBLK; |
267 | fattr->cf_dtype = DT_BLK; | |
268 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
269 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
270 | break; |
271 | case UNIX_FIFO: | |
cc0bad75 JL |
272 | fattr->cf_mode |= S_IFIFO; |
273 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
274 | break; |
275 | case UNIX_SOCKET: | |
cc0bad75 JL |
276 | fattr->cf_mode |= S_IFSOCK; |
277 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
278 | break; |
279 | default: | |
280 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
281 | fattr->cf_mode |= S_IFREG; |
282 | fattr->cf_dtype = DT_REG; | |
f96637be | 283 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
284 | break; |
285 | } | |
286 | ||
46bbc25f EB |
287 | fattr->cf_uid = cifs_sb->mnt_uid; |
288 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { | |
289 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
290 | if (id < ((uid_t)-1)) { |
291 | kuid_t uid = make_kuid(&init_user_ns, id); | |
292 | if (uid_valid(uid)) | |
293 | fattr->cf_uid = uid; | |
294 | } | |
46bbc25f EB |
295 | } |
296 | ||
297 | fattr->cf_gid = cifs_sb->mnt_gid; | |
298 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { | |
299 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
300 | if (id < ((gid_t)-1)) { |
301 | kgid_t gid = make_kgid(&init_user_ns, id); | |
302 | if (gid_valid(gid)) | |
303 | fattr->cf_gid = gid; | |
304 | } | |
46bbc25f | 305 | } |
75f12983 | 306 | |
cc0bad75 | 307 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
308 | } |
309 | ||
b9a3260f | 310 | /* |
cc0bad75 JL |
311 | * Fill a cifs_fattr struct with fake inode info. |
312 | * | |
313 | * Needed to setup cifs_fattr data for the directory which is the | |
314 | * junction to the new submount (ie to setup the fake directory | |
315 | * which represents a DFS referral). | |
b9a3260f | 316 | */ |
f1230c97 | 317 | static void |
cc0bad75 | 318 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 319 | { |
cc0bad75 | 320 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 321 | |
f96637be | 322 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
323 | |
324 | memset(fattr, 0, sizeof(*fattr)); | |
325 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
326 | fattr->cf_uid = cifs_sb->mnt_uid; | |
327 | fattr->cf_gid = cifs_sb->mnt_gid; | |
e37fea58 DD |
328 | ktime_get_real_ts(&fattr->cf_mtime); |
329 | fattr->cf_mtime = timespec_trunc(fattr->cf_mtime, sb->s_time_gran); | |
330 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; | |
cc0bad75 JL |
331 | fattr->cf_nlink = 2; |
332 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
0e4bbde9 SF |
333 | } |
334 | ||
4ad65044 PS |
335 | static int |
336 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
337 | { |
338 | int rc; | |
6d5786a3 | 339 | unsigned int xid; |
abab095d JL |
340 | FILE_UNIX_BASIC_INFO find_data; |
341 | struct cifs_fattr fattr; | |
496ad9aa | 342 | struct inode *inode = file_inode(filp); |
abab095d | 343 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 344 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 345 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 346 | |
6d5786a3 | 347 | xid = get_xid(); |
4b4de76e | 348 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
349 | if (!rc) { |
350 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
351 | } else if (rc == -EREMOTE) { | |
352 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
353 | rc = 0; | |
354 | } | |
355 | ||
356 | cifs_fattr_to_inode(inode, &fattr); | |
6d5786a3 | 357 | free_xid(xid); |
abab095d JL |
358 | return rc; |
359 | } | |
360 | ||
1da177e4 | 361 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 362 | const unsigned char *full_path, |
6d5786a3 | 363 | struct super_block *sb, unsigned int xid) |
1da177e4 | 364 | { |
cc0bad75 | 365 | int rc; |
0e4bbde9 | 366 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 367 | struct cifs_fattr fattr; |
96daf2b0 | 368 | struct cifs_tcon *tcon; |
7ffec372 | 369 | struct tcon_link *tlink; |
1da177e4 | 370 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 371 | |
f96637be | 372 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 373 | |
7ffec372 JL |
374 | tlink = cifs_sb_tlink(cifs_sb); |
375 | if (IS_ERR(tlink)) | |
376 | return PTR_ERR(tlink); | |
377 | tcon = tlink_tcon(tlink); | |
378 | ||
1da177e4 | 379 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 380 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 381 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 382 | cifs_put_tlink(tlink); |
e911d0cc | 383 | |
cc0bad75 JL |
384 | if (!rc) { |
385 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
386 | } else if (rc == -EREMOTE) { | |
387 | cifs_create_dfs_fattr(&fattr, sb); | |
388 | rc = 0; | |
389 | } else { | |
390 | return rc; | |
391 | } | |
1da177e4 | 392 | |
1b12b9c1 SM |
393 | /* check for Minshall+French symlinks */ |
394 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
395 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
396 | full_path); | |
1b12b9c1 | 397 | if (tmprc) |
cb084b1a | 398 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
399 | } |
400 | ||
0e4bbde9 | 401 | if (*pinode == NULL) { |
cc0bad75 | 402 | /* get new inode */ |
4065c802 | 403 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
404 | *pinode = cifs_iget(sb, &fattr); |
405 | if (!*pinode) | |
0e4bbde9 | 406 | rc = -ENOMEM; |
cc0bad75 JL |
407 | } else { |
408 | /* we already have inode, update it */ | |
7196ac11 NA |
409 | |
410 | /* if uniqueid is different, return error */ | |
411 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
412 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
413 | rc = -ESTALE; | |
414 | goto cgiiu_exit; | |
415 | } | |
416 | ||
417 | /* if filetype is different, return error */ | |
418 | if (unlikely(((*pinode)->i_mode & S_IFMT) != | |
419 | (fattr.cf_mode & S_IFMT))) { | |
420 | rc = -ESTALE; | |
421 | goto cgiiu_exit; | |
422 | } | |
423 | ||
cc0bad75 | 424 | cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 425 | } |
1da177e4 | 426 | |
7196ac11 | 427 | cgiiu_exit: |
1da177e4 LT |
428 | return rc; |
429 | } | |
430 | ||
0b8f18e3 | 431 | static int |
0360d605 | 432 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 433 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
434 | { |
435 | int rc; | |
db8b631d | 436 | __u32 oplock; |
7ffec372 | 437 | struct tcon_link *tlink; |
96daf2b0 | 438 | struct cifs_tcon *tcon; |
d81b8a40 PS |
439 | struct cifs_fid fid; |
440 | struct cifs_open_parms oparms; | |
d4ffff1f | 441 | struct cifs_io_parms io_parms; |
86c96b4b | 442 | char buf[24]; |
d6e2f2a4 | 443 | unsigned int bytes_read; |
fb8c4b14 | 444 | char *pbuf; |
0360d605 | 445 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
446 | |
447 | pbuf = buf; | |
448 | ||
0b8f18e3 JL |
449 | fattr->cf_mode &= ~S_IFMT; |
450 | ||
451 | if (fattr->cf_eof == 0) { | |
452 | fattr->cf_mode |= S_IFIFO; | |
453 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 454 | return 0; |
0b8f18e3 JL |
455 | } else if (fattr->cf_eof < 8) { |
456 | fattr->cf_mode |= S_IFREG; | |
457 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
458 | return -EINVAL; /* EOPNOTSUPP? */ |
459 | } | |
50c2f753 | 460 | |
7ffec372 JL |
461 | tlink = cifs_sb_tlink(cifs_sb); |
462 | if (IS_ERR(tlink)) | |
463 | return PTR_ERR(tlink); | |
464 | tcon = tlink_tcon(tlink); | |
465 | ||
d81b8a40 PS |
466 | oparms.tcon = tcon; |
467 | oparms.cifs_sb = cifs_sb; | |
468 | oparms.desired_access = GENERIC_READ; | |
469 | oparms.create_options = CREATE_NOT_DIR; | |
b0b69369 SF |
470 | if (backup_cred(cifs_sb)) |
471 | oparms.create_options |= CREATE_OPEN_BACKUP_INTENT; | |
d81b8a40 PS |
472 | oparms.disposition = FILE_OPEN; |
473 | oparms.path = path; | |
474 | oparms.fid = &fid; | |
475 | oparms.reconnect = false; | |
476 | ||
db8b631d SF |
477 | if (tcon->ses->server->oplocks) |
478 | oplock = REQ_OPLOCK; | |
479 | else | |
480 | oplock = 0; | |
481 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 482 | if (rc) { |
db8b631d | 483 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
484 | cifs_put_tlink(tlink); |
485 | return rc; | |
486 | } | |
487 | ||
488 | /* Read header */ | |
d81b8a40 | 489 | io_parms.netfid = fid.netfid; |
0360d605 PS |
490 | io_parms.pid = current->tgid; |
491 | io_parms.tcon = tcon; | |
492 | io_parms.offset = 0; | |
493 | io_parms.length = 24; | |
494 | ||
db8b631d SF |
495 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
496 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
497 | if ((rc == 0) && (bytes_read >= 8)) { |
498 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
499 | cifs_dbg(FYI, "Block device\n"); | |
500 | fattr->cf_mode |= S_IFBLK; | |
501 | fattr->cf_dtype = DT_BLK; | |
502 | if (bytes_read == 24) { | |
503 | /* we have enough to decode dev num */ | |
504 | __u64 mjr; /* major */ | |
505 | __u64 mnr; /* minor */ | |
506 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
507 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
508 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 509 | } |
0360d605 PS |
510 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
511 | cifs_dbg(FYI, "Char device\n"); | |
512 | fattr->cf_mode |= S_IFCHR; | |
513 | fattr->cf_dtype = DT_CHR; | |
514 | if (bytes_read == 24) { | |
515 | /* we have enough to decode dev num */ | |
516 | __u64 mjr; /* major */ | |
517 | __u64 mnr; /* minor */ | |
518 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
519 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
520 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
521 | } | |
522 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
523 | cifs_dbg(FYI, "Symlink\n"); | |
524 | fattr->cf_mode |= S_IFLNK; | |
525 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 526 | } else { |
0360d605 | 527 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 528 | fattr->cf_dtype = DT_REG; |
0360d605 | 529 | rc = -EOPNOTSUPP; |
fb8c4b14 | 530 | } |
0360d605 PS |
531 | } else { |
532 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
533 | fattr->cf_dtype = DT_REG; | |
534 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 535 | } |
db8b631d SF |
536 | |
537 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 538 | cifs_put_tlink(tlink); |
d6e2f2a4 | 539 | return rc; |
d6e2f2a4 SF |
540 | } |
541 | ||
9e294f1c SF |
542 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
543 | ||
0b8f18e3 JL |
544 | /* |
545 | * Fetch mode bits as provided by SFU. | |
546 | * | |
547 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
548 | */ | |
549 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 550 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 551 | { |
3020a1f5 | 552 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
553 | ssize_t rc; |
554 | char ea_value[4]; | |
555 | __u32 mode; | |
7ffec372 | 556 | struct tcon_link *tlink; |
96daf2b0 | 557 | struct cifs_tcon *tcon; |
7ffec372 JL |
558 | |
559 | tlink = cifs_sb_tlink(cifs_sb); | |
560 | if (IS_ERR(tlink)) | |
561 | return PTR_ERR(tlink); | |
562 | tcon = tlink_tcon(tlink); | |
9e294f1c | 563 | |
d979f3b0 SF |
564 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
565 | cifs_put_tlink(tlink); | |
566 | return -EOPNOTSUPP; | |
567 | } | |
568 | ||
569 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
570 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 571 | cifs_sb); |
7ffec372 | 572 | cifs_put_tlink(tlink); |
4523cc30 | 573 | if (rc < 0) |
9e294f1c SF |
574 | return (int)rc; |
575 | else if (rc > 3) { | |
576 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 577 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
578 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
579 | mode, fattr->cf_mode); | |
0b8f18e3 | 580 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 581 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 582 | } |
0b8f18e3 JL |
583 | |
584 | return 0; | |
3020a1f5 SF |
585 | #else |
586 | return -EOPNOTSUPP; | |
587 | #endif | |
9e294f1c SF |
588 | } |
589 | ||
0b8f18e3 | 590 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 591 | static void |
0b8f18e3 | 592 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 593 | struct super_block *sb, bool adjust_tz, |
eb85d94b | 594 | bool symlink) |
b9a3260f | 595 | { |
e37fea58 | 596 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 597 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 598 | |
0b8f18e3 JL |
599 | memset(fattr, 0, sizeof(*fattr)); |
600 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
601 | if (info->DeletePending) | |
602 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
603 | ||
604 | if (info->LastAccessTime) | |
605 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
e37fea58 DD |
606 | else { |
607 | ktime_get_real_ts(&fattr->cf_atime); | |
608 | fattr->cf_atime = timespec_trunc(fattr->cf_atime, sb->s_time_gran); | |
609 | } | |
0b8f18e3 JL |
610 | |
611 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
612 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
613 | ||
614 | if (adjust_tz) { | |
0d424ad0 JL |
615 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
616 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
617 | } |
618 | ||
619 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
620 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 621 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 622 | |
74d290da | 623 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
eb85d94b PS |
624 | |
625 | if (symlink) { | |
626 | fattr->cf_mode = S_IFLNK; | |
627 | fattr->cf_dtype = DT_LNK; | |
628 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
0b8f18e3 JL |
629 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
630 | fattr->cf_dtype = DT_DIR; | |
6de2ce42 PS |
631 | /* |
632 | * Server can return wrong NumberOfLinks value for directories | |
633 | * when Unix extensions are disabled - fake it. | |
634 | */ | |
74d290da JM |
635 | if (!tcon->unix_ext) |
636 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 JL |
637 | } else { |
638 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
639 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 640 | |
d0c280d2 JL |
641 | /* clear write bits if ATTR_READONLY is set */ |
642 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
643 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 644 | |
74d290da JM |
645 | /* |
646 | * Don't accept zero nlink from non-unix servers unless | |
647 | * delete is pending. Instead mark it as unknown. | |
648 | */ | |
649 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
650 | !info->DeletePending) { | |
651 | cifs_dbg(1, "bogus file nlink value %u\n", | |
6658b9f7 | 652 | fattr->cf_nlink); |
74d290da | 653 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 654 | } |
6de2ce42 | 655 | } |
0b8f18e3 JL |
656 | |
657 | fattr->cf_uid = cifs_sb->mnt_uid; | |
658 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
659 | } |
660 | ||
4ad65044 PS |
661 | static int |
662 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
663 | { |
664 | int rc; | |
6d5786a3 | 665 | unsigned int xid; |
abab095d JL |
666 | FILE_ALL_INFO find_data; |
667 | struct cifs_fattr fattr; | |
496ad9aa | 668 | struct inode *inode = file_inode(filp); |
c21dfb69 | 669 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 670 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
671 | struct TCP_Server_Info *server = tcon->ses->server; |
672 | ||
673 | if (!server->ops->query_file_info) | |
674 | return -ENOSYS; | |
abab095d | 675 | |
6d5786a3 | 676 | xid = get_xid(); |
4ad65044 | 677 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
678 | switch (rc) { |
679 | case 0: | |
e37fea58 | 680 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
eb85d94b | 681 | false); |
42274bb2 PS |
682 | break; |
683 | case -EREMOTE: | |
684 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
685 | rc = 0; | |
686 | break; | |
687 | case -EOPNOTSUPP: | |
688 | case -EINVAL: | |
abab095d JL |
689 | /* |
690 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
691 | * for now, just skip revalidating and mark inode for |
692 | * immediate reval. | |
693 | */ | |
abab095d JL |
694 | rc = 0; |
695 | CIFS_I(inode)->time = 0; | |
42274bb2 | 696 | default: |
abab095d | 697 | goto cgfi_exit; |
42274bb2 | 698 | } |
abab095d JL |
699 | |
700 | /* | |
701 | * don't bother with SFU junk here -- just mark inode as needing | |
702 | * revalidation. | |
703 | */ | |
abab095d JL |
704 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
705 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
706 | cifs_fattr_to_inode(inode, &fattr); | |
707 | cgfi_exit: | |
6d5786a3 | 708 | free_xid(xid); |
abab095d JL |
709 | return rc; |
710 | } | |
711 | ||
70dbed63 SF |
712 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
713 | static __u64 simple_hashstr(const char *str) | |
714 | { | |
8f041940 | 715 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
70dbed63 SF |
716 | __u64 hash = 0; |
717 | ||
718 | while (*str) | |
719 | hash = (hash + (__u64) *str++) * hash_mult; | |
720 | ||
721 | return hash; | |
722 | } | |
723 | ||
1208ef1f PS |
724 | int |
725 | cifs_get_inode_info(struct inode **inode, const char *full_path, | |
726 | FILE_ALL_INFO *data, struct super_block *sb, int xid, | |
42eacf9e | 727 | const struct cifs_fid *fid) |
1da177e4 | 728 | { |
c052e2b4 SP |
729 | bool validinum = false; |
730 | __u16 srchflgs; | |
731 | int rc = 0, tmprc = ENOSYS; | |
1208ef1f PS |
732 | struct cifs_tcon *tcon; |
733 | struct TCP_Server_Info *server; | |
7ffec372 | 734 | struct tcon_link *tlink; |
1da177e4 | 735 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 736 | char *buf = NULL; |
1208ef1f | 737 | bool adjust_tz = false; |
0b8f18e3 | 738 | struct cifs_fattr fattr; |
c052e2b4 | 739 | struct cifs_search_info *srchinf = NULL; |
eb85d94b | 740 | bool symlink = false; |
1da177e4 | 741 | |
7ffec372 JL |
742 | tlink = cifs_sb_tlink(cifs_sb); |
743 | if (IS_ERR(tlink)) | |
744 | return PTR_ERR(tlink); | |
1208ef1f PS |
745 | tcon = tlink_tcon(tlink); |
746 | server = tcon->ses->server; | |
7ffec372 | 747 | |
f96637be | 748 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
1da177e4 | 749 | |
1208ef1f | 750 | if ((data == NULL) && (*inode != NULL)) { |
18cceb6a | 751 | if (CIFS_CACHE_READ(CIFS_I(*inode))) { |
f96637be | 752 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
7ffec372 | 753 | goto cgii_exit; |
1da177e4 LT |
754 | } |
755 | } | |
756 | ||
1208ef1f PS |
757 | /* if inode info is not passed, get it from server */ |
758 | if (data == NULL) { | |
759 | if (!server->ops->query_path_info) { | |
760 | rc = -ENOSYS; | |
761 | goto cgii_exit; | |
762 | } | |
1da177e4 | 763 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
7ffec372 JL |
764 | if (buf == NULL) { |
765 | rc = -ENOMEM; | |
766 | goto cgii_exit; | |
767 | } | |
1208ef1f PS |
768 | data = (FILE_ALL_INFO *)buf; |
769 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path, | |
eb85d94b | 770 | data, &adjust_tz, &symlink); |
1da177e4 | 771 | } |
0b8f18e3 JL |
772 | |
773 | if (!rc) { | |
e37fea58 | 774 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, |
eb85d94b | 775 | symlink); |
0b8f18e3 JL |
776 | } else if (rc == -EREMOTE) { |
777 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 778 | rc = 0; |
122f2bd8 SF |
779 | } else if ((rc == -EACCES) && backup_cred(cifs_sb) && |
780 | (strcmp(server->vals->version_string, SMB1_VERSION_STRING) | |
781 | == 0)) { | |
1d41cd12 SF |
782 | /* |
783 | * For SMB2 and later the backup intent flag is already | |
784 | * sent if needed on open and there is no path based | |
785 | * FindFirst operation to use to retry with | |
786 | */ | |
787 | ||
788 | srchinf = kzalloc(sizeof(struct cifs_search_info), | |
789 | GFP_KERNEL); | |
790 | if (srchinf == NULL) { | |
791 | rc = -ENOMEM; | |
792 | goto cgii_exit; | |
793 | } | |
c052e2b4 | 794 | |
1d41cd12 SF |
795 | srchinf->endOfSearch = false; |
796 | if (tcon->unix_ext) | |
797 | srchinf->info_level = SMB_FIND_FILE_UNIX; | |
798 | else if ((tcon->ses->capabilities & | |
799 | tcon->ses->server->vals->cap_nt_find) == 0) | |
800 | srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD; | |
801 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
c052e2b4 | 802 | srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
1d41cd12 SF |
803 | else /* no srvino useful for fallback to some netapp */ |
804 | srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
c052e2b4 | 805 | |
1d41cd12 SF |
806 | srchflgs = CIFS_SEARCH_CLOSE_ALWAYS | |
807 | CIFS_SEARCH_CLOSE_AT_END | | |
808 | CIFS_SEARCH_BACKUP_SEARCH; | |
c052e2b4 | 809 | |
1d41cd12 SF |
810 | rc = CIFSFindFirst(xid, tcon, full_path, |
811 | cifs_sb, NULL, srchflgs, srchinf, false); | |
812 | if (!rc) { | |
813 | data = (FILE_ALL_INFO *)srchinf->srch_entries_start; | |
c052e2b4 | 814 | |
1d41cd12 SF |
815 | cifs_dir_info_to_fattr(&fattr, |
816 | (FILE_DIRECTORY_INFO *)data, cifs_sb); | |
817 | fattr.cf_uniqueid = le64_to_cpu( | |
818 | ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId); | |
819 | validinum = true; | |
c052e2b4 | 820 | |
1d41cd12 SF |
821 | cifs_buf_release(srchinf->ntwrk_buf_start); |
822 | } | |
823 | kfree(srchinf); | |
824 | if (rc) | |
825 | goto cgii_exit; | |
c052e2b4 | 826 | } else |
7962670e | 827 | goto cgii_exit; |
1da177e4 | 828 | |
0b8f18e3 JL |
829 | /* |
830 | * If an inode wasn't passed in, then get the inode number | |
831 | * | |
832 | * Is an i_ino of zero legal? Can we use that to check if the server | |
833 | * supports returning inode numbers? Are there other sanity checks we | |
834 | * can use to ensure that the server is really filling in that field? | |
0b8f18e3 | 835 | */ |
1208ef1f | 836 | if (*inode == NULL) { |
b9a3260f | 837 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
c052e2b4 SP |
838 | if (validinum == false) { |
839 | if (server->ops->get_srv_inum) | |
840 | tmprc = server->ops->get_srv_inum(xid, | |
841 | tcon, cifs_sb, full_path, | |
842 | &fattr.cf_uniqueid, data); | |
843 | if (tmprc) { | |
f96637be JP |
844 | cifs_dbg(FYI, "GetSrvInodeNum rc %d\n", |
845 | tmprc); | |
c052e2b4 SP |
846 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
847 | cifs_autodisable_serverino(cifs_sb); | |
70dbed63 SF |
848 | } else if ((fattr.cf_uniqueid == 0) && |
849 | strlen(full_path) == 0) { | |
850 | /* some servers ret bad root ino ie 0 */ | |
851 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
852 | fattr.cf_flags |= | |
853 | CIFS_FATTR_FAKE_ROOT_INO; | |
854 | fattr.cf_uniqueid = | |
855 | simple_hashstr(tcon->treeName); | |
c052e2b4 | 856 | } |
132ac7b7 | 857 | } |
c052e2b4 | 858 | } else |
0b8f18e3 | 859 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
a108471b RL |
860 | } else { |
861 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && | |
862 | validinum == false && server->ops->get_srv_inum) { | |
863 | /* | |
864 | * Pass a NULL tcon to ensure we don't make a round | |
865 | * trip to the server. This only works for SMB2+. | |
866 | */ | |
867 | tmprc = server->ops->get_srv_inum(xid, | |
868 | NULL, cifs_sb, full_path, | |
869 | &fattr.cf_uniqueid, data); | |
870 | if (tmprc) | |
871 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
70dbed63 SF |
872 | else if ((fattr.cf_uniqueid == 0) && |
873 | strlen(full_path) == 0) { | |
874 | /* | |
875 | * Reuse existing root inode num since | |
876 | * inum zero for root causes ls of . and .. to | |
877 | * not be returned | |
878 | */ | |
879 | cifs_dbg(FYI, "Srv ret 0 inode num for root\n"); | |
880 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
881 | } | |
a108471b RL |
882 | } else |
883 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
884 | } | |
b9a3260f | 885 | |
0b8f18e3 JL |
886 | /* query for SFU type info if supported and needed */ |
887 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
888 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
889 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
890 | if (tmprc) | |
f96637be | 891 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 892 | } |
1da177e4 | 893 | |
79df1bae | 894 | #ifdef CONFIG_CIFS_ACL |
b9a3260f SF |
895 | /* fill in 0777 bits from ACL */ |
896 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
1208ef1f | 897 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid); |
78415d2d | 898 | if (rc) { |
f96637be JP |
899 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
900 | __func__, rc); | |
78415d2d SP |
901 | goto cgii_exit; |
902 | } | |
b9a3260f | 903 | } |
79df1bae | 904 | #endif /* CONFIG_CIFS_ACL */ |
b9a3260f | 905 | |
0b8f18e3 JL |
906 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
907 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
908 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 909 | |
1b12b9c1 SM |
910 | /* check for Minshall+French symlinks */ |
911 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
912 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
913 | full_path); | |
1b12b9c1 | 914 | if (tmprc) |
cb084b1a | 915 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
916 | } |
917 | ||
1208ef1f PS |
918 | if (!*inode) { |
919 | *inode = cifs_iget(sb, &fattr); | |
920 | if (!*inode) | |
0b8f18e3 JL |
921 | rc = -ENOMEM; |
922 | } else { | |
7196ac11 NA |
923 | /* we already have inode, update it */ |
924 | ||
a108471b RL |
925 | /* if uniqueid is different, return error */ |
926 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
927 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
928 | rc = -ESTALE; | |
929 | goto cgii_exit; | |
930 | } | |
931 | ||
7196ac11 NA |
932 | /* if filetype is different, return error */ |
933 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
934 | (fattr.cf_mode & S_IFMT))) { | |
935 | rc = -ESTALE; | |
936 | goto cgii_exit; | |
937 | } | |
938 | ||
1208ef1f | 939 | cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 940 | } |
b9a3260f | 941 | |
7962670e | 942 | cgii_exit: |
70dbed63 SF |
943 | if ((*inode) && ((*inode)->i_ino == 0)) |
944 | cifs_dbg(FYI, "inode number of zero returned\n"); | |
945 | ||
1da177e4 | 946 | kfree(buf); |
7ffec372 | 947 | cifs_put_tlink(tlink); |
1da177e4 LT |
948 | return rc; |
949 | } | |
950 | ||
7f8ed420 SF |
951 | static const struct inode_operations cifs_ipc_inode_ops = { |
952 | .lookup = cifs_lookup, | |
953 | }; | |
954 | ||
cc0bad75 JL |
955 | static int |
956 | cifs_find_inode(struct inode *inode, void *opaque) | |
957 | { | |
958 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
959 | ||
f30b9c11 | 960 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
961 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
962 | return 0; | |
963 | ||
20054bd6 JL |
964 | /* use createtime like an i_generation field */ |
965 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
966 | return 0; | |
967 | ||
f30b9c11 JL |
968 | /* don't match inode of different type */ |
969 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
970 | return 0; | |
971 | ||
5acfec25 | 972 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 973 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 974 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 975 | |
cc0bad75 JL |
976 | return 1; |
977 | } | |
978 | ||
979 | static int | |
980 | cifs_init_inode(struct inode *inode, void *opaque) | |
981 | { | |
982 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
983 | ||
984 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 985 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
986 | return 0; |
987 | } | |
988 | ||
5acfec25 JL |
989 | /* |
990 | * walk dentry list for an inode and report whether it has aliases that | |
991 | * are hashed. We use this to determine if a directory inode can actually | |
992 | * be used. | |
993 | */ | |
994 | static bool | |
995 | inode_has_hashed_dentries(struct inode *inode) | |
996 | { | |
997 | struct dentry *dentry; | |
998 | ||
873feea0 | 999 | spin_lock(&inode->i_lock); |
946e51f2 | 1000 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1001 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1002 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1003 | return true; |
1004 | } | |
1005 | } | |
873feea0 | 1006 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1007 | return false; |
1008 | } | |
1009 | ||
cc0bad75 JL |
1010 | /* Given fattrs, get a corresponding inode */ |
1011 | struct inode * | |
1012 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1013 | { | |
1014 | unsigned long hash; | |
1015 | struct inode *inode; | |
1016 | ||
3d694380 | 1017 | retry_iget5_locked: |
f96637be | 1018 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1019 | |
1020 | /* hash down to 32-bits on 32-bit arch */ | |
1021 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1022 | ||
1023 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1024 | if (inode) { |
5acfec25 | 1025 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1026 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1027 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1028 | |
1029 | if (inode_has_hashed_dentries(inode)) { | |
1030 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1031 | iput(inode); | |
1032 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1033 | goto retry_iget5_locked; | |
1034 | } | |
3d694380 JL |
1035 | } |
1036 | ||
cc0bad75 JL |
1037 | cifs_fattr_to_inode(inode, fattr); |
1038 | if (sb->s_flags & MS_NOATIME) | |
1039 | inode->i_flags |= S_NOATIME | S_NOCMTIME; | |
1040 | if (inode->i_state & I_NEW) { | |
1041 | inode->i_ino = hash; | |
0ccd4802 | 1042 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1043 | /* initialize per-inode cache cookie pointer */ |
1044 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1045 | #endif |
cc0bad75 JL |
1046 | unlock_new_inode(inode); |
1047 | } | |
1048 | } | |
1049 | ||
1050 | return inode; | |
1051 | } | |
1052 | ||
1da177e4 | 1053 | /* gets root inode */ |
9b6763e0 | 1054 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1055 | { |
6d5786a3 | 1056 | unsigned int xid; |
0d424ad0 | 1057 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1058 | struct inode *inode = NULL; |
ce634ab2 | 1059 | long rc; |
96daf2b0 | 1060 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1061 | char *path = NULL; |
1062 | int len; | |
1063 | ||
1064 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1065 | && cifs_sb->prepath) { | |
1066 | len = strlen(cifs_sb->prepath); | |
1067 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1068 | if (path == NULL) | |
1069 | return ERR_PTR(-ENOMEM); | |
1070 | path[0] = '/'; | |
1071 | memcpy(path+1, cifs_sb->prepath, len); | |
1072 | } else { | |
1073 | path = kstrdup("", GFP_KERNEL); | |
1074 | if (path == NULL) | |
1075 | return ERR_PTR(-ENOMEM); | |
1076 | } | |
ce634ab2 | 1077 | |
6d5786a3 | 1078 | xid = get_xid(); |
b5b374ea | 1079 | if (tcon->unix_ext) { |
a6b5058f | 1080 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1081 | /* some servers mistakenly claim POSIX support */ |
1082 | if (rc != -EOPNOTSUPP) | |
1083 | goto iget_no_retry; | |
1084 | cifs_dbg(VFS, "server does not support POSIX extensions"); | |
1085 | tcon->unix_ext = false; | |
1086 | } | |
1087 | ||
a6b5058f AA |
1088 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
1089 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1090 | |
b5b374ea | 1091 | iget_no_retry: |
a7851ce7 OS |
1092 | if (!inode) { |
1093 | inode = ERR_PTR(rc); | |
1094 | goto out; | |
1095 | } | |
cc0bad75 | 1096 | |
0ccd4802 | 1097 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1098 | /* populate tcon->resource_id */ |
0d424ad0 | 1099 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1100 | #endif |
d03382ce | 1101 | |
0d424ad0 | 1102 | if (rc && tcon->ipc) { |
f96637be | 1103 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1104 | spin_lock(&inode->i_lock); |
7f8ed420 | 1105 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1106 | set_nlink(inode, 2); |
7f8ed420 SF |
1107 | inode->i_op = &cifs_ipc_inode_ops; |
1108 | inode->i_fop = &simple_dir_operations; | |
1109 | inode->i_uid = cifs_sb->mnt_uid; | |
1110 | inode->i_gid = cifs_sb->mnt_gid; | |
b7ca6928 | 1111 | spin_unlock(&inode->i_lock); |
ad661334 | 1112 | } else if (rc) { |
ce634ab2 | 1113 | iget_failed(inode); |
a7851ce7 | 1114 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1115 | } |
1116 | ||
a7851ce7 | 1117 | out: |
a6b5058f | 1118 | kfree(path); |
6d5786a3 | 1119 | /* can not call macro free_xid here since in a void func |
ce634ab2 DH |
1120 | * TODO: This is no longer true |
1121 | */ | |
6d5786a3 | 1122 | _free_xid(xid); |
ce634ab2 | 1123 | return inode; |
1da177e4 LT |
1124 | } |
1125 | ||
ed6875e0 | 1126 | int |
6d5786a3 | 1127 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
ed6875e0 | 1128 | char *full_path, __u32 dosattr) |
388e57b2 | 1129 | { |
388e57b2 | 1130 | bool set_time = false; |
388e57b2 | 1131 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1132 | struct TCP_Server_Info *server; |
388e57b2 SF |
1133 | FILE_BASIC_INFO info_buf; |
1134 | ||
1adcb710 SF |
1135 | if (attrs == NULL) |
1136 | return -EINVAL; | |
1137 | ||
6bdf6dbd PS |
1138 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1139 | if (!server->ops->set_file_info) | |
1140 | return -ENOSYS; | |
1141 | ||
be1210c7 SF |
1142 | info_buf.Pad = 0; |
1143 | ||
388e57b2 SF |
1144 | if (attrs->ia_valid & ATTR_ATIME) { |
1145 | set_time = true; | |
1146 | info_buf.LastAccessTime = | |
1147 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); | |
1148 | } else | |
1149 | info_buf.LastAccessTime = 0; | |
1150 | ||
1151 | if (attrs->ia_valid & ATTR_MTIME) { | |
1152 | set_time = true; | |
1153 | info_buf.LastWriteTime = | |
1154 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); | |
1155 | } else | |
1156 | info_buf.LastWriteTime = 0; | |
1157 | ||
1158 | /* | |
1159 | * Samba throws this field away, but windows may actually use it. | |
1160 | * Do not set ctime unless other time stamps are changed explicitly | |
1161 | * (i.e. by utimes()) since we would then have a mix of client and | |
1162 | * server times. | |
1163 | */ | |
1164 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1165 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 SF |
1166 | info_buf.ChangeTime = |
1167 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); | |
1168 | } else | |
1169 | info_buf.ChangeTime = 0; | |
1170 | ||
1171 | info_buf.CreationTime = 0; /* don't change */ | |
1172 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1173 | ||
6bdf6dbd | 1174 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1175 | } |
1176 | ||
a12a1ac7 | 1177 | /* |
ed6875e0 | 1178 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1179 | * and rename it to a random name that hopefully won't conflict with |
1180 | * anything else. | |
1181 | */ | |
ed6875e0 PS |
1182 | int |
1183 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1184 | const unsigned int xid) | |
a12a1ac7 JL |
1185 | { |
1186 | int oplock = 0; | |
1187 | int rc; | |
d81b8a40 PS |
1188 | struct cifs_fid fid; |
1189 | struct cifs_open_parms oparms; | |
2b0143b5 | 1190 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1191 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1192 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1193 | struct tcon_link *tlink; |
96daf2b0 | 1194 | struct cifs_tcon *tcon; |
3270958b SF |
1195 | __u32 dosattr, origattr; |
1196 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1197 | |
7ffec372 JL |
1198 | tlink = cifs_sb_tlink(cifs_sb); |
1199 | if (IS_ERR(tlink)) | |
1200 | return PTR_ERR(tlink); | |
1201 | tcon = tlink_tcon(tlink); | |
1202 | ||
c483a984 SP |
1203 | /* |
1204 | * We cannot rename the file if the server doesn't support | |
1205 | * CAP_INFOLEVEL_PASSTHRU | |
1206 | */ | |
1207 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1208 | rc = -EBUSY; | |
1209 | goto out; | |
1210 | } | |
1211 | ||
d81b8a40 PS |
1212 | oparms.tcon = tcon; |
1213 | oparms.cifs_sb = cifs_sb; | |
1214 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
1215 | oparms.create_options = CREATE_NOT_DIR; | |
1216 | oparms.disposition = FILE_OPEN; | |
1217 | oparms.path = full_path; | |
1218 | oparms.fid = &fid; | |
1219 | oparms.reconnect = false; | |
1220 | ||
1221 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1222 | if (rc != 0) |
1223 | goto out; | |
1224 | ||
3270958b SF |
1225 | origattr = cifsInode->cifsAttrs; |
1226 | if (origattr == 0) | |
1227 | origattr |= ATTR_NORMAL; | |
1228 | ||
1229 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1230 | if (dosattr == 0) |
1231 | dosattr |= ATTR_NORMAL; | |
1232 | dosattr |= ATTR_HIDDEN; | |
1233 | ||
3270958b SF |
1234 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1235 | if (dosattr != origattr) { | |
1236 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1237 | if (info_buf == NULL) { | |
1238 | rc = -ENOMEM; | |
1239 | goto out_close; | |
1240 | } | |
1241 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1242 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1243 | current->tgid); |
1244 | /* although we would like to mark the file hidden | |
1245 | if that fails we will still try to rename it */ | |
72d282dc | 1246 | if (!rc) |
3270958b SF |
1247 | cifsInode->cifsAttrs = dosattr; |
1248 | else | |
1249 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1250 | } |
a12a1ac7 | 1251 | |
dd1db2de | 1252 | /* rename the file */ |
d81b8a40 PS |
1253 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1254 | cifs_sb->local_nls, | |
2baa2682 | 1255 | cifs_remap(cifs_sb)); |
3270958b | 1256 | if (rc != 0) { |
47c78f4a | 1257 | rc = -EBUSY; |
3270958b SF |
1258 | goto undo_setattr; |
1259 | } | |
6d22f098 | 1260 | |
3270958b | 1261 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1262 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1263 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1264 | current->tgid); |
1265 | /* | |
1266 | * some samba versions return -ENOENT when we try to set the | |
1267 | * file disposition here. Likely a samba bug, but work around | |
1268 | * it for now. This means that some cifsXXX files may hang | |
1269 | * around after they shouldn't. | |
1270 | * | |
1271 | * BB: remove this hack after more servers have the fix | |
1272 | */ | |
1273 | if (rc == -ENOENT) | |
1274 | rc = 0; | |
1275 | else if (rc != 0) { | |
47c78f4a | 1276 | rc = -EBUSY; |
3270958b SF |
1277 | goto undo_rename; |
1278 | } | |
aff8d5ca | 1279 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1280 | } |
7ce86d5a | 1281 | |
a12a1ac7 | 1282 | out_close: |
d81b8a40 | 1283 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1284 | out: |
3270958b | 1285 | kfree(info_buf); |
7ffec372 | 1286 | cifs_put_tlink(tlink); |
a12a1ac7 | 1287 | return rc; |
3270958b SF |
1288 | |
1289 | /* | |
1290 | * reset everything back to the original state. Don't bother | |
1291 | * dealing with errors here since we can't do anything about | |
1292 | * them anyway. | |
1293 | */ | |
1294 | undo_rename: | |
d81b8a40 | 1295 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1296 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1297 | undo_setattr: |
1298 | if (dosattr != origattr) { | |
1299 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1300 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1301 | current->tgid)) |
1302 | cifsInode->cifsAttrs = origattr; | |
1303 | } | |
1304 | ||
1305 | goto out_close; | |
a12a1ac7 JL |
1306 | } |
1307 | ||
b7ca6928 SF |
1308 | /* copied from fs/nfs/dir.c with small changes */ |
1309 | static void | |
1310 | cifs_drop_nlink(struct inode *inode) | |
1311 | { | |
1312 | spin_lock(&inode->i_lock); | |
1313 | if (inode->i_nlink > 0) | |
1314 | drop_nlink(inode); | |
1315 | spin_unlock(&inode->i_lock); | |
1316 | } | |
ff694527 SF |
1317 | |
1318 | /* | |
2b0143b5 | 1319 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1320 | * is a negative dentry) then we would attempt a standard SMB delete, but |
af901ca1 AGR |
1321 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1322 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
1323 | * unlink on negative dentries currently. |
1324 | */ | |
5f0319a7 | 1325 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1326 | { |
1327 | int rc = 0; | |
6d5786a3 | 1328 | unsigned int xid; |
1da177e4 | 1329 | char *full_path = NULL; |
2b0143b5 | 1330 | struct inode *inode = d_inode(dentry); |
ff694527 | 1331 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1332 | struct super_block *sb = dir->i_sb; |
1333 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1334 | struct tcon_link *tlink; |
96daf2b0 | 1335 | struct cifs_tcon *tcon; |
ed6875e0 | 1336 | struct TCP_Server_Info *server; |
6050247d SF |
1337 | struct iattr *attrs = NULL; |
1338 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1339 | |
f96637be | 1340 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1341 | |
7ffec372 JL |
1342 | tlink = cifs_sb_tlink(cifs_sb); |
1343 | if (IS_ERR(tlink)) | |
1344 | return PTR_ERR(tlink); | |
1345 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1346 | server = tcon->ses->server; |
7ffec372 | 1347 | |
6d5786a3 | 1348 | xid = get_xid(); |
1da177e4 | 1349 | |
5f0319a7 JL |
1350 | /* Unlink can be called from rename so we can not take the |
1351 | * sb->s_vfs_rename_mutex here */ | |
1352 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1353 | if (full_path == NULL) { |
0f3bc09e | 1354 | rc = -ENOMEM; |
7ffec372 | 1355 | goto unlink_out; |
1da177e4 | 1356 | } |
2d785a50 | 1357 | |
29e20f9c PS |
1358 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1359 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1360 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1361 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1362 | cifs_remap(cifs_sb)); |
f96637be | 1363 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1364 | if ((rc == 0) || (rc == -ENOENT)) |
1365 | goto psx_del_no_retry; | |
1366 | } | |
1da177e4 | 1367 | |
6050247d | 1368 | retry_std_delete: |
ed6875e0 PS |
1369 | if (!server->ops->unlink) { |
1370 | rc = -ENOSYS; | |
1371 | goto psx_del_no_retry; | |
1372 | } | |
1373 | ||
1374 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1375 | |
2d785a50 | 1376 | psx_del_no_retry: |
1da177e4 | 1377 | if (!rc) { |
5f0319a7 | 1378 | if (inode) |
b7ca6928 | 1379 | cifs_drop_nlink(inode); |
1da177e4 | 1380 | } else if (rc == -ENOENT) { |
5f0319a7 | 1381 | d_drop(dentry); |
47c78f4a | 1382 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1383 | if (server->ops->rename_pending_delete) { |
1384 | rc = server->ops->rename_pending_delete(full_path, | |
1385 | dentry, xid); | |
1386 | if (rc == 0) | |
1387 | cifs_drop_nlink(inode); | |
1388 | } | |
ff694527 | 1389 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1390 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1391 | if (attrs == NULL) { | |
1392 | rc = -ENOMEM; | |
1393 | goto out_reval; | |
1da177e4 | 1394 | } |
388e57b2 SF |
1395 | |
1396 | /* try to reset dos attributes */ | |
ff694527 SF |
1397 | cifs_inode = CIFS_I(inode); |
1398 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1399 | if (origattr == 0) |
1400 | origattr |= ATTR_NORMAL; | |
1401 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1402 | if (dosattr == 0) |
1403 | dosattr |= ATTR_NORMAL; | |
1404 | dosattr |= ATTR_HIDDEN; | |
1405 | ||
1406 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1407 | if (rc != 0) |
1408 | goto out_reval; | |
6050247d SF |
1409 | |
1410 | goto retry_std_delete; | |
1da177e4 | 1411 | } |
6050247d SF |
1412 | |
1413 | /* undo the setattr if we errored out and it's needed */ | |
1414 | if (rc != 0 && dosattr != 0) | |
1415 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1416 | ||
388e57b2 | 1417 | out_reval: |
4523cc30 | 1418 | if (inode) { |
ff694527 SF |
1419 | cifs_inode = CIFS_I(inode); |
1420 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1421 | when needed */ |
e37fea58 | 1422 | inode->i_ctime = current_time(inode); |
06bcfedd | 1423 | } |
e37fea58 | 1424 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1425 | cifs_inode = CIFS_I(dir); |
6050247d | 1426 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1427 | unlink_out: |
1da177e4 | 1428 | kfree(full_path); |
6050247d | 1429 | kfree(attrs); |
6d5786a3 | 1430 | free_xid(xid); |
7ffec372 | 1431 | cifs_put_tlink(tlink); |
1da177e4 LT |
1432 | return rc; |
1433 | } | |
1434 | ||
ff691e96 | 1435 | static int |
101b92d9 | 1436 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1437 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1438 | struct cifs_tcon *tcon, const unsigned int xid) | |
1439 | { | |
1440 | int rc = 0; | |
101b92d9 | 1441 | struct inode *inode = NULL; |
ff691e96 PS |
1442 | |
1443 | if (tcon->unix_ext) | |
101b92d9 | 1444 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1445 | xid); |
1446 | else | |
101b92d9 JL |
1447 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1448 | xid, NULL); | |
1449 | ||
ff691e96 PS |
1450 | if (rc) |
1451 | return rc; | |
1452 | ||
ff691e96 PS |
1453 | /* |
1454 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1455 | * from the server or was set bogus. Also, since this is a brand new |
1456 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1457 | */ |
101b92d9 JL |
1458 | if (inode->i_nlink < 2) |
1459 | set_nlink(inode, 2); | |
ff691e96 PS |
1460 | mode &= ~current_umask(); |
1461 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1462 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1463 | mode |= S_ISGID; |
1464 | ||
1465 | if (tcon->unix_ext) { | |
1466 | struct cifs_unix_set_info_args args = { | |
1467 | .mode = mode, | |
1468 | .ctime = NO_CHANGE_64, | |
1469 | .atime = NO_CHANGE_64, | |
1470 | .mtime = NO_CHANGE_64, | |
1471 | .device = 0, | |
1472 | }; | |
1473 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1474 | args.uid = current_fsuid(); |
101b92d9 | 1475 | if (parent->i_mode & S_ISGID) |
49418b2c | 1476 | args.gid = parent->i_gid; |
ff691e96 | 1477 | else |
49418b2c | 1478 | args.gid = current_fsgid(); |
ff691e96 | 1479 | } else { |
49418b2c EB |
1480 | args.uid = INVALID_UID; /* no change */ |
1481 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1482 | } |
1483 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1484 | cifs_sb->local_nls, | |
2baa2682 | 1485 | cifs_remap(cifs_sb)); |
ff691e96 | 1486 | } else { |
f436720e | 1487 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1488 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1489 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1490 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1491 | tcon, xid); |
101b92d9 JL |
1492 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1493 | inode->i_mode = (mode | S_IFDIR); | |
1494 | ||
1495 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1496 | inode->i_uid = current_fsuid(); | |
1497 | if (inode->i_mode & S_ISGID) | |
1498 | inode->i_gid = parent->i_gid; | |
1499 | else | |
1500 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1501 | } |
1502 | } | |
101b92d9 | 1503 | d_instantiate(dentry, inode); |
ff691e96 PS |
1504 | return rc; |
1505 | } | |
1506 | ||
1507 | static int | |
1508 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1509 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1510 | struct cifs_tcon *tcon, const unsigned int xid) | |
1511 | { | |
1512 | int rc = 0; | |
1513 | u32 oplock = 0; | |
1514 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1515 | struct inode *newinode = NULL; | |
1516 | struct cifs_fattr fattr; | |
1517 | ||
1518 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1519 | if (info == NULL) { | |
1520 | rc = -ENOMEM; | |
1521 | goto posix_mkdir_out; | |
1522 | } | |
1523 | ||
1524 | mode &= ~current_umask(); | |
1525 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1526 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1527 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1528 | if (rc == -EOPNOTSUPP) |
1529 | goto posix_mkdir_out; | |
1530 | else if (rc) { | |
f96637be | 1531 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1532 | d_drop(dentry); |
1533 | goto posix_mkdir_out; | |
1534 | } | |
1535 | ||
1536 | if (info->Type == cpu_to_le32(-1)) | |
1537 | /* no return info, go query for it */ | |
1538 | goto posix_mkdir_get_info; | |
1539 | /* | |
1540 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1541 | * need to set uid/gid. | |
1542 | */ | |
1543 | ||
1544 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1545 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1546 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1547 | if (!newinode) | |
1548 | goto posix_mkdir_get_info; | |
1549 | ||
1550 | d_instantiate(dentry, newinode); | |
1551 | ||
1552 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1553 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1554 | dentry, dentry, newinode); | |
ff691e96 PS |
1555 | |
1556 | if (newinode->i_nlink != 2) | |
f96637be JP |
1557 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1558 | newinode->i_nlink); | |
ff691e96 PS |
1559 | #endif |
1560 | ||
1561 | posix_mkdir_out: | |
1562 | kfree(info); | |
1563 | return rc; | |
1564 | posix_mkdir_get_info: | |
1565 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1566 | xid); | |
1567 | goto posix_mkdir_out; | |
1568 | } | |
1569 | ||
18bb1db3 | 1570 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) |
1da177e4 | 1571 | { |
ff691e96 | 1572 | int rc = 0; |
6d5786a3 | 1573 | unsigned int xid; |
1da177e4 | 1574 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1575 | struct tcon_link *tlink; |
29e20f9c | 1576 | struct cifs_tcon *tcon; |
f436720e | 1577 | struct TCP_Server_Info *server; |
ff691e96 | 1578 | char *full_path; |
1da177e4 | 1579 | |
f96637be JP |
1580 | cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n", |
1581 | mode, inode); | |
1da177e4 | 1582 | |
1da177e4 | 1583 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
1584 | tlink = cifs_sb_tlink(cifs_sb); |
1585 | if (IS_ERR(tlink)) | |
1586 | return PTR_ERR(tlink); | |
29e20f9c | 1587 | tcon = tlink_tcon(tlink); |
7ffec372 | 1588 | |
6d5786a3 | 1589 | xid = get_xid(); |
1da177e4 | 1590 | |
7f57356b | 1591 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1592 | if (full_path == NULL) { |
0f3bc09e | 1593 | rc = -ENOMEM; |
7ffec372 | 1594 | goto mkdir_out; |
1da177e4 | 1595 | } |
50c2f753 | 1596 | |
29e20f9c PS |
1597 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1598 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1599 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1600 | tcon, xid); | |
1601 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1602 | goto mkdir_out; |
fb8c4b14 | 1603 | } |
ff691e96 | 1604 | |
f436720e PS |
1605 | server = tcon->ses->server; |
1606 | ||
1607 | if (!server->ops->mkdir) { | |
1608 | rc = -ENOSYS; | |
1609 | goto mkdir_out; | |
1610 | } | |
1611 | ||
1da177e4 | 1612 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
f436720e | 1613 | rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb); |
1da177e4 | 1614 | if (rc) { |
f96637be | 1615 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1616 | d_drop(direntry); |
ff691e96 | 1617 | goto mkdir_out; |
1da177e4 | 1618 | } |
ff691e96 PS |
1619 | |
1620 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, | |
1621 | xid); | |
fb8c4b14 | 1622 | mkdir_out: |
6de2ce42 PS |
1623 | /* |
1624 | * Force revalidate to get parent dir info when needed since cached | |
1625 | * attributes are invalid now. | |
1626 | */ | |
1627 | CIFS_I(inode)->time = 0; | |
1da177e4 | 1628 | kfree(full_path); |
6d5786a3 | 1629 | free_xid(xid); |
7ffec372 | 1630 | cifs_put_tlink(tlink); |
1da177e4 LT |
1631 | return rc; |
1632 | } | |
1633 | ||
1634 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1635 | { | |
1636 | int rc = 0; | |
6d5786a3 | 1637 | unsigned int xid; |
1da177e4 | 1638 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1639 | struct tcon_link *tlink; |
f958ca5d PS |
1640 | struct cifs_tcon *tcon; |
1641 | struct TCP_Server_Info *server; | |
1da177e4 LT |
1642 | char *full_path = NULL; |
1643 | struct cifsInodeInfo *cifsInode; | |
1644 | ||
f96637be | 1645 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1646 | |
6d5786a3 | 1647 | xid = get_xid(); |
1da177e4 | 1648 | |
7f57356b | 1649 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1650 | if (full_path == NULL) { |
0f3bc09e | 1651 | rc = -ENOMEM; |
7ffec372 | 1652 | goto rmdir_exit; |
1da177e4 LT |
1653 | } |
1654 | ||
7ffec372 JL |
1655 | cifs_sb = CIFS_SB(inode->i_sb); |
1656 | tlink = cifs_sb_tlink(cifs_sb); | |
1657 | if (IS_ERR(tlink)) { | |
1658 | rc = PTR_ERR(tlink); | |
1659 | goto rmdir_exit; | |
1660 | } | |
f958ca5d PS |
1661 | tcon = tlink_tcon(tlink); |
1662 | server = tcon->ses->server; | |
1663 | ||
1664 | if (!server->ops->rmdir) { | |
1665 | rc = -ENOSYS; | |
1666 | cifs_put_tlink(tlink); | |
1667 | goto rmdir_exit; | |
1668 | } | |
7ffec372 | 1669 | |
f958ca5d | 1670 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1671 | cifs_put_tlink(tlink); |
1da177e4 LT |
1672 | |
1673 | if (!rc) { | |
2b0143b5 DH |
1674 | spin_lock(&d_inode(direntry)->i_lock); |
1675 | i_size_write(d_inode(direntry), 0); | |
1676 | clear_nlink(d_inode(direntry)); | |
1677 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1678 | } |
1679 | ||
2b0143b5 | 1680 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1681 | /* force revalidate to go get info when needed */ |
1682 | cifsInode->time = 0; | |
42c24544 SF |
1683 | |
1684 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1685 | /* |
1686 | * Force revalidate to get parent dir info when needed since cached | |
1687 | * attributes are invalid now. | |
1688 | */ | |
1689 | cifsInode->time = 0; | |
42c24544 | 1690 | |
2b0143b5 | 1691 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 1692 | current_time(inode); |
1da177e4 | 1693 | |
7ffec372 | 1694 | rmdir_exit: |
1da177e4 | 1695 | kfree(full_path); |
6d5786a3 | 1696 | free_xid(xid); |
1da177e4 LT |
1697 | return rc; |
1698 | } | |
1699 | ||
ee2fd967 | 1700 | static int |
8ceb9843 PS |
1701 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
1702 | const char *from_path, struct dentry *to_dentry, | |
1703 | const char *to_path) | |
ee2fd967 SF |
1704 | { |
1705 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 1706 | struct tcon_link *tlink; |
8ceb9843 PS |
1707 | struct cifs_tcon *tcon; |
1708 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
1709 | struct cifs_fid fid; |
1710 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
1711 | int oplock, rc; |
1712 | ||
7ffec372 JL |
1713 | tlink = cifs_sb_tlink(cifs_sb); |
1714 | if (IS_ERR(tlink)) | |
1715 | return PTR_ERR(tlink); | |
8ceb9843 PS |
1716 | tcon = tlink_tcon(tlink); |
1717 | server = tcon->ses->server; | |
1718 | ||
1719 | if (!server->ops->rename) | |
1720 | return -ENOSYS; | |
7ffec372 | 1721 | |
ee2fd967 | 1722 | /* try path-based rename first */ |
8ceb9843 | 1723 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
1724 | |
1725 | /* | |
8ceb9843 PS |
1726 | * Don't bother with rename by filehandle unless file is busy and |
1727 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
1728 | * rename by filehandle to various Windows servers. |
1729 | */ | |
47c78f4a | 1730 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 1731 | goto do_rename_exit; |
ee2fd967 | 1732 | |
ed0e3ace JL |
1733 | /* open-file renames don't work across directories */ |
1734 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 1735 | goto do_rename_exit; |
ed0e3ace | 1736 | |
d81b8a40 PS |
1737 | oparms.tcon = tcon; |
1738 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 1739 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 PS |
1740 | oparms.desired_access = DELETE; |
1741 | oparms.create_options = CREATE_NOT_DIR; | |
1742 | oparms.disposition = FILE_OPEN; | |
1743 | oparms.path = from_path; | |
1744 | oparms.fid = &fid; | |
1745 | oparms.reconnect = false; | |
1746 | ||
1747 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 1748 | if (rc == 0) { |
d81b8a40 | 1749 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 1750 | (const char *) to_dentry->d_name.name, |
2baa2682 | 1751 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 1752 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 1753 | } |
7ffec372 JL |
1754 | do_rename_exit: |
1755 | cifs_put_tlink(tlink); | |
ee2fd967 SF |
1756 | return rc; |
1757 | } | |
1758 | ||
8ceb9843 | 1759 | int |
7c33d597 MS |
1760 | cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, |
1761 | struct inode *target_dir, struct dentry *target_dentry, | |
1762 | unsigned int flags) | |
1da177e4 | 1763 | { |
8ceb9843 PS |
1764 | char *from_name = NULL; |
1765 | char *to_name = NULL; | |
639e7a91 | 1766 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1767 | struct tcon_link *tlink; |
96daf2b0 | 1768 | struct cifs_tcon *tcon; |
ee2fd967 SF |
1769 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1770 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
1771 | unsigned int xid; |
1772 | int rc, tmprc; | |
1da177e4 | 1773 | |
7c33d597 MS |
1774 | if (flags & ~RENAME_NOREPLACE) |
1775 | return -EINVAL; | |
1776 | ||
639e7a91 | 1777 | cifs_sb = CIFS_SB(source_dir->i_sb); |
7ffec372 JL |
1778 | tlink = cifs_sb_tlink(cifs_sb); |
1779 | if (IS_ERR(tlink)) | |
1780 | return PTR_ERR(tlink); | |
1781 | tcon = tlink_tcon(tlink); | |
1da177e4 | 1782 | |
6d5786a3 | 1783 | xid = get_xid(); |
ee2fd967 | 1784 | |
ee2fd967 SF |
1785 | /* |
1786 | * we already have the rename sem so we do not need to | |
1787 | * grab it again here to protect the path integrity | |
1788 | */ | |
8ceb9843 PS |
1789 | from_name = build_path_from_dentry(source_dentry); |
1790 | if (from_name == NULL) { | |
ee2fd967 SF |
1791 | rc = -ENOMEM; |
1792 | goto cifs_rename_exit; | |
1793 | } | |
1794 | ||
8ceb9843 PS |
1795 | to_name = build_path_from_dentry(target_dentry); |
1796 | if (to_name == NULL) { | |
1da177e4 LT |
1797 | rc = -ENOMEM; |
1798 | goto cifs_rename_exit; | |
1799 | } | |
1800 | ||
8ceb9843 PS |
1801 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
1802 | to_name); | |
ee2fd967 | 1803 | |
7c33d597 MS |
1804 | /* |
1805 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
1806 | */ | |
1807 | if (flags & RENAME_NOREPLACE) | |
1808 | goto cifs_rename_exit; | |
1809 | ||
14121bdc JL |
1810 | if (rc == -EEXIST && tcon->unix_ext) { |
1811 | /* | |
8ceb9843 PS |
1812 | * Are src and dst hardlinks of same inode? We can only tell |
1813 | * with unix extensions enabled. | |
14121bdc JL |
1814 | */ |
1815 | info_buf_source = | |
1816 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), | |
1817 | GFP_KERNEL); | |
1818 | if (info_buf_source == NULL) { | |
1819 | rc = -ENOMEM; | |
1820 | goto cifs_rename_exit; | |
1821 | } | |
1822 | ||
1823 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
1824 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
1825 | info_buf_source, | |
1826 | cifs_sb->local_nls, | |
2baa2682 | 1827 | cifs_remap(cifs_sb)); |
8d281efb | 1828 | if (tmprc != 0) |
14121bdc | 1829 | goto unlink_target; |
ee2fd967 | 1830 | |
8ceb9843 PS |
1831 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
1832 | info_buf_target, | |
1833 | cifs_sb->local_nls, | |
2baa2682 | 1834 | cifs_remap(cifs_sb)); |
14121bdc | 1835 | |
8d281efb | 1836 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1837 | info_buf_target->UniqueId)) { |
14121bdc | 1838 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1839 | rc = 0; |
14121bdc | 1840 | goto cifs_rename_exit; |
ae6884a9 | 1841 | } |
8ceb9843 PS |
1842 | } |
1843 | /* | |
1844 | * else ... BB we could add the same check for Windows by | |
1845 | * checking the UniqueId via FILE_INTERNAL_INFO | |
1846 | */ | |
14121bdc | 1847 | |
ee2fd967 | 1848 | unlink_target: |
fc6f3943 | 1849 | /* Try unlinking the target dentry if it's not negative */ |
2b0143b5 | 1850 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { |
a07d3220 PS |
1851 | if (d_is_dir(target_dentry)) |
1852 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
1853 | else | |
1854 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
1855 | if (tmprc) |
1856 | goto cifs_rename_exit; | |
8ceb9843 PS |
1857 | rc = cifs_do_rename(xid, source_dentry, from_name, |
1858 | target_dentry, to_name); | |
1da177e4 LT |
1859 | } |
1860 | ||
b46799a8 PS |
1861 | /* force revalidate to go get info when needed */ |
1862 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
1863 | ||
1864 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 1865 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 1866 | |
1da177e4 | 1867 | cifs_rename_exit: |
ee2fd967 | 1868 | kfree(info_buf_source); |
8ceb9843 PS |
1869 | kfree(from_name); |
1870 | kfree(to_name); | |
6d5786a3 | 1871 | free_xid(xid); |
7ffec372 | 1872 | cifs_put_tlink(tlink); |
1da177e4 LT |
1873 | return rc; |
1874 | } | |
1875 | ||
df2cf170 JL |
1876 | static bool |
1877 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1878 | { |
df2cf170 | 1879 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 1880 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1da177e4 | 1881 | |
18cceb6a | 1882 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 1883 | return false; |
1da177e4 | 1884 | |
df2cf170 JL |
1885 | if (!lookupCacheEnabled) |
1886 | return true; | |
1da177e4 | 1887 | |
df2cf170 JL |
1888 | if (cifs_i->time == 0) |
1889 | return true; | |
1da177e4 | 1890 | |
a87c9ad9 JL |
1891 | if (!cifs_sb->actimeo) |
1892 | return true; | |
1893 | ||
6d20e840 SJ |
1894 | if (!time_in_range(jiffies, cifs_i->time, |
1895 | cifs_i->time + cifs_sb->actimeo)) | |
df2cf170 JL |
1896 | return true; |
1897 | ||
db19272e | 1898 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 1899 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
1900 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
1901 | return true; | |
1902 | ||
df2cf170 JL |
1903 | return false; |
1904 | } | |
1905 | ||
523fb8c8 SJ |
1906 | /* |
1907 | * Zap the cache. Called when invalid_mapping flag is set. | |
1908 | */ | |
6feb9891 | 1909 | int |
df2cf170 JL |
1910 | cifs_invalidate_mapping(struct inode *inode) |
1911 | { | |
6feb9891 | 1912 | int rc = 0; |
df2cf170 | 1913 | |
df2cf170 | 1914 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 1915 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 1916 | if (rc) |
f96637be JP |
1917 | cifs_dbg(VFS, "%s: could not invalidate inode %p\n", |
1918 | __func__, inode); | |
df2cf170 | 1919 | } |
257fb1f1 | 1920 | |
9451a9a5 | 1921 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 1922 | return rc; |
df2cf170 JL |
1923 | } |
1924 | ||
4f73c7d3 JL |
1925 | /** |
1926 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
1927 | * @word: long word containing the bit lock | |
1928 | */ | |
1929 | static int | |
dfd01f02 | 1930 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 1931 | { |
4f73c7d3 | 1932 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
1933 | if (signal_pending_state(mode, current)) |
1934 | return -ERESTARTSYS; | |
4f73c7d3 JL |
1935 | return 0; |
1936 | } | |
1937 | ||
e284e53f JL |
1938 | int |
1939 | cifs_revalidate_mapping(struct inode *inode) | |
1940 | { | |
4f73c7d3 JL |
1941 | int rc; |
1942 | unsigned long *flags = &CIFS_I(inode)->flags; | |
1943 | ||
74316201 N |
1944 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
1945 | TASK_KILLABLE); | |
4f73c7d3 JL |
1946 | if (rc) |
1947 | return rc; | |
1948 | ||
1949 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
1950 | rc = cifs_invalidate_mapping(inode); | |
1951 | if (rc) | |
1952 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
1953 | } | |
1954 | ||
1955 | clear_bit_unlock(CIFS_INO_LOCK, flags); | |
b1cce803 | 1956 | smp_mb__after_atomic(); |
4f73c7d3 JL |
1957 | wake_up_bit(flags, CIFS_INO_LOCK); |
1958 | ||
1959 | return rc; | |
1960 | } | |
1961 | ||
1962 | int | |
1963 | cifs_zap_mapping(struct inode *inode) | |
1964 | { | |
1965 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
1966 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
1967 | } |
1968 | ||
6feb9891 | 1969 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
1970 | { |
1971 | int rc = 0; | |
496ad9aa | 1972 | struct inode *inode = file_inode(filp); |
ba00ba64 | 1973 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d JL |
1974 | |
1975 | if (!cifs_inode_needs_reval(inode)) | |
6feb9891 | 1976 | return rc; |
abab095d | 1977 | |
13cfb733 | 1978 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
1979 | rc = cifs_get_file_info_unix(filp); |
1980 | else | |
1981 | rc = cifs_get_file_info(filp); | |
1982 | ||
abab095d JL |
1983 | return rc; |
1984 | } | |
1985 | ||
6feb9891 | 1986 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 1987 | { |
6d5786a3 | 1988 | unsigned int xid; |
df2cf170 | 1989 | int rc = 0; |
2b0143b5 | 1990 | struct inode *inode = d_inode(dentry); |
df2cf170 | 1991 | struct super_block *sb = dentry->d_sb; |
6feb9891 | 1992 | char *full_path = NULL; |
df2cf170 JL |
1993 | |
1994 | if (inode == NULL) | |
1995 | return -ENOENT; | |
1da177e4 | 1996 | |
df2cf170 | 1997 | if (!cifs_inode_needs_reval(inode)) |
6feb9891 PS |
1998 | return rc; |
1999 | ||
6d5786a3 | 2000 | xid = get_xid(); |
1da177e4 LT |
2001 | |
2002 | /* can not safely grab the rename sem here if rename calls revalidate | |
2003 | since that would deadlock */ | |
df2cf170 | 2004 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 2005 | if (full_path == NULL) { |
0f3bc09e | 2006 | rc = -ENOMEM; |
6feb9891 | 2007 | goto out; |
1da177e4 LT |
2008 | } |
2009 | ||
f96637be JP |
2010 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2011 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2012 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2013 | |
0d424ad0 | 2014 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) |
df2cf170 JL |
2015 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2016 | else | |
2017 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2018 | xid, NULL); | |
1da177e4 | 2019 | |
6feb9891 | 2020 | out: |
1da177e4 | 2021 | kfree(full_path); |
6d5786a3 | 2022 | free_xid(xid); |
1da177e4 LT |
2023 | return rc; |
2024 | } | |
2025 | ||
6feb9891 PS |
2026 | int cifs_revalidate_file(struct file *filp) |
2027 | { | |
2028 | int rc; | |
496ad9aa | 2029 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2030 | |
2031 | rc = cifs_revalidate_file_attr(filp); | |
2032 | if (rc) | |
2033 | return rc; | |
2034 | ||
e284e53f | 2035 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2036 | } |
2037 | ||
2038 | /* revalidate a dentry's inode attributes */ | |
2039 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2040 | { | |
2041 | int rc; | |
2b0143b5 | 2042 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2043 | |
2044 | rc = cifs_revalidate_dentry_attr(dentry); | |
2045 | if (rc) | |
2046 | return rc; | |
2047 | ||
e284e53f | 2048 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2049 | } |
2050 | ||
a528d35e DH |
2051 | int cifs_getattr(const struct path *path, struct kstat *stat, |
2052 | u32 request_mask, unsigned int flags) | |
1da177e4 | 2053 | { |
a528d35e | 2054 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2055 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2056 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2057 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2058 | int rc; |
3aa1c8c2 | 2059 | |
6feb9891 PS |
2060 | /* |
2061 | * We need to be sure that all dirty pages are written and the server | |
2062 | * has actual ctime, mtime and file length. | |
2063 | */ | |
18cceb6a | 2064 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
6feb9891 PS |
2065 | inode->i_mapping->nrpages != 0) { |
2066 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
2067 | if (rc) { |
2068 | mapping_set_error(inode->i_mapping, rc); | |
2069 | return rc; | |
2070 | } | |
6feb9891 | 2071 | } |
1c456013 | 2072 | |
6feb9891 PS |
2073 | rc = cifs_revalidate_dentry_attr(dentry); |
2074 | if (rc) | |
2075 | return rc; | |
2076 | ||
2077 | generic_fillattr(inode, stat); | |
2078 | stat->blksize = CIFS_MAX_MSGSIZE; | |
2079 | stat->ino = CIFS_I(inode)->uniqueid; | |
2080 | ||
6e70e26d SF |
2081 | /* old CIFS Unix Extensions doesn't return create time */ |
2082 | if (CIFS_I(inode)->createtime) { | |
2083 | stat->result_mask |= STATX_BTIME; | |
2084 | stat->btime = | |
2085 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
2086 | } | |
2087 | ||
2088 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2089 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2090 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2091 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2092 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2093 | ||
6feb9891 | 2094 | /* |
d3d1fce1 JL |
2095 | * If on a multiuser mount without unix extensions or cifsacl being |
2096 | * enabled, and the admin hasn't overridden them, set the ownership | |
2097 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2098 | */ |
2099 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2100 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2101 | !tcon->unix_ext) { |
2102 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2103 | stat->uid = current_fsuid(); | |
2104 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2105 | stat->gid = current_fsgid(); | |
5fe14c85 | 2106 | } |
6feb9891 | 2107 | return rc; |
1da177e4 LT |
2108 | } |
2109 | ||
2110 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
2111 | { | |
09cbfeaf KS |
2112 | pgoff_t index = from >> PAGE_SHIFT; |
2113 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2114 | struct page *page; |
1da177e4 LT |
2115 | int rc = 0; |
2116 | ||
2117 | page = grab_cache_page(mapping, index); | |
2118 | if (!page) | |
2119 | return -ENOMEM; | |
2120 | ||
09cbfeaf | 2121 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2122 | unlock_page(page); |
09cbfeaf | 2123 | put_page(page); |
1da177e4 LT |
2124 | return rc; |
2125 | } | |
2126 | ||
1b947463 | 2127 | static void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2128 | { |
ba6a46a0 | 2129 | spin_lock(&inode->i_lock); |
3677db10 | 2130 | i_size_write(inode, offset); |
ba6a46a0 | 2131 | spin_unlock(&inode->i_lock); |
1b947463 | 2132 | |
7caef267 | 2133 | truncate_pagecache(inode, offset); |
3677db10 SF |
2134 | } |
2135 | ||
8efdbde6 JL |
2136 | static int |
2137 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
6d5786a3 | 2138 | unsigned int xid, char *full_path) |
8efdbde6 JL |
2139 | { |
2140 | int rc; | |
2141 | struct cifsFileInfo *open_file; | |
2142 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2143 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2144 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2145 | struct cifs_tcon *tcon = NULL; |
2146 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2147 | |
2148 | /* | |
2149 | * To avoid spurious oplock breaks from server, in the case of | |
2150 | * inodes that we already have open, avoid doing path based | |
2151 | * setting of file size if we can do it by handle. | |
2152 | * This keeps our caching token (oplock) and avoids timeouts | |
2153 | * when the local oplock break takes longer to flush | |
2154 | * writebehind data than the SMB timeout for the SetPathInfo | |
2155 | * request would allow | |
2156 | */ | |
6508d904 | 2157 | open_file = find_writable_file(cifsInode, true); |
8efdbde6 | 2158 | if (open_file) { |
d1433418 PS |
2159 | tcon = tlink_tcon(open_file->tlink); |
2160 | server = tcon->ses->server; | |
2161 | if (server->ops->set_file_size) | |
2162 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2163 | attrs->ia_size, false); | |
2164 | else | |
2165 | rc = -ENOSYS; | |
6ab409b5 | 2166 | cifsFileInfo_put(open_file); |
f96637be | 2167 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2168 | } else |
2169 | rc = -EINVAL; | |
2170 | ||
d1433418 PS |
2171 | if (!rc) |
2172 | goto set_size_out; | |
2173 | ||
2174 | if (tcon == NULL) { | |
2175 | tlink = cifs_sb_tlink(cifs_sb); | |
2176 | if (IS_ERR(tlink)) | |
2177 | return PTR_ERR(tlink); | |
2178 | tcon = tlink_tcon(tlink); | |
2179 | server = tcon->ses->server; | |
2180 | } | |
ba00ba64 | 2181 | |
d1433418 PS |
2182 | /* |
2183 | * Set file size by pathname rather than by handle either because no | |
2184 | * valid, writeable file handle for it was found or because there was | |
2185 | * an error setting it by handle. | |
2186 | */ | |
2187 | if (server->ops->set_path_size) | |
2188 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2189 | attrs->ia_size, cifs_sb, false); | |
2190 | else | |
2191 | rc = -ENOSYS; | |
f96637be | 2192 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2193 | |
d1433418 PS |
2194 | if (tlink) |
2195 | cifs_put_tlink(tlink); | |
8efdbde6 | 2196 | |
d1433418 | 2197 | set_size_out: |
8efdbde6 | 2198 | if (rc == 0) { |
fbec9ab9 | 2199 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2200 | cifs_setsize(inode, attrs->ia_size); |
8efdbde6 JL |
2201 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2202 | } | |
2203 | ||
2204 | return rc; | |
2205 | } | |
2206 | ||
3fe5c1dd JL |
2207 | static int |
2208 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2209 | { | |
2210 | int rc; | |
6d5786a3 | 2211 | unsigned int xid; |
3fe5c1dd | 2212 | char *full_path = NULL; |
2b0143b5 | 2213 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2214 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2215 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2216 | struct tcon_link *tlink; |
96daf2b0 | 2217 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2218 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2219 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2220 | |
35c265e0 AV |
2221 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2222 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2223 | |
6d5786a3 | 2224 | xid = get_xid(); |
3fe5c1dd | 2225 | |
db78b877 CH |
2226 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2227 | attrs->ia_valid |= ATTR_FORCE; | |
2228 | ||
31051c85 | 2229 | rc = setattr_prepare(direntry, attrs); |
db78b877 CH |
2230 | if (rc < 0) |
2231 | goto out; | |
3fe5c1dd JL |
2232 | |
2233 | full_path = build_path_from_dentry(direntry); | |
2234 | if (full_path == NULL) { | |
2235 | rc = -ENOMEM; | |
2236 | goto out; | |
2237 | } | |
2238 | ||
0f4d634c JL |
2239 | /* |
2240 | * Attempt to flush data before changing attributes. We need to do | |
2241 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2242 | * ownership or mode then we may also need to do this. Here, we take | |
2243 | * the safe way out and just do the flush on all setattr requests. If | |
2244 | * the flush returns error, store it to report later and continue. | |
2245 | * | |
2246 | * BB: This should be smarter. Why bother flushing pages that | |
2247 | * will be truncated anyway? Also, should we error out here if | |
2248 | * the flush returns error? | |
2249 | */ | |
2250 | rc = filemap_write_and_wait(inode->i_mapping); | |
eb4b756b JL |
2251 | mapping_set_error(inode->i_mapping, rc); |
2252 | rc = 0; | |
3fe5c1dd JL |
2253 | |
2254 | if (attrs->ia_valid & ATTR_SIZE) { | |
2255 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2256 | if (rc != 0) | |
2257 | goto out; | |
2258 | } | |
2259 | ||
2260 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2261 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2262 | attrs->ia_valid &= ~ATTR_MODE; | |
2263 | ||
2264 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2265 | if (args == NULL) { | |
2266 | rc = -ENOMEM; | |
2267 | goto out; | |
2268 | } | |
2269 | ||
2270 | /* set up the struct */ | |
2271 | if (attrs->ia_valid & ATTR_MODE) | |
2272 | args->mode = attrs->ia_mode; | |
2273 | else | |
2274 | args->mode = NO_CHANGE_64; | |
2275 | ||
2276 | if (attrs->ia_valid & ATTR_UID) | |
2277 | args->uid = attrs->ia_uid; | |
2278 | else | |
49418b2c | 2279 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2280 | |
2281 | if (attrs->ia_valid & ATTR_GID) | |
2282 | args->gid = attrs->ia_gid; | |
2283 | else | |
49418b2c | 2284 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2285 | |
2286 | if (attrs->ia_valid & ATTR_ATIME) | |
2287 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); | |
2288 | else | |
2289 | args->atime = NO_CHANGE_64; | |
2290 | ||
2291 | if (attrs->ia_valid & ATTR_MTIME) | |
2292 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); | |
2293 | else | |
2294 | args->mtime = NO_CHANGE_64; | |
2295 | ||
2296 | if (attrs->ia_valid & ATTR_CTIME) | |
2297 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); | |
2298 | else | |
2299 | args->ctime = NO_CHANGE_64; | |
2300 | ||
2301 | args->device = 0; | |
6508d904 | 2302 | open_file = find_writable_file(cifsInode, true); |
3bbeeb3c | 2303 | if (open_file) { |
4b4de76e | 2304 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2305 | u32 npid = open_file->pid; |
13cfb733 | 2306 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2307 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2308 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2309 | } else { |
7ffec372 JL |
2310 | tlink = cifs_sb_tlink(cifs_sb); |
2311 | if (IS_ERR(tlink)) { | |
2312 | rc = PTR_ERR(tlink); | |
2313 | goto out; | |
2314 | } | |
2315 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2316 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2317 | cifs_sb->local_nls, |
bc8ebdc4 | 2318 | cifs_remap(cifs_sb)); |
7ffec372 | 2319 | cifs_put_tlink(tlink); |
3bbeeb3c | 2320 | } |
3fe5c1dd | 2321 | |
1025774c CH |
2322 | if (rc) |
2323 | goto out; | |
ccd4bb1b | 2324 | |
1025774c | 2325 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2326 | attrs->ia_size != i_size_read(inode)) |
2327 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2328 | |
2329 | setattr_copy(inode, attrs); | |
2330 | mark_inode_dirty(inode); | |
2331 | ||
2332 | /* force revalidate when any of these times are set since some | |
2333 | of the fs types (eg ext3, fat) do not have fine enough | |
2334 | time granularity to match protocol, and we do not have a | |
2335 | a way (yet) to query the server fs's time granularity (and | |
2336 | whether it rounds times down). | |
2337 | */ | |
2338 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2339 | cifsInode->time = 0; | |
3fe5c1dd JL |
2340 | out: |
2341 | kfree(args); | |
2342 | kfree(full_path); | |
6d5786a3 | 2343 | free_xid(xid); |
3fe5c1dd JL |
2344 | return rc; |
2345 | } | |
2346 | ||
0510eeb7 JL |
2347 | static int |
2348 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2349 | { |
6d5786a3 | 2350 | unsigned int xid; |
8abf2775 EB |
2351 | kuid_t uid = INVALID_UID; |
2352 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2353 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2354 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2355 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
2356 | char *full_path = NULL; |
2357 | int rc = -EACCES; | |
feb3e20c | 2358 | __u32 dosattr = 0; |
4e1e7fb9 | 2359 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2360 | |
6d5786a3 | 2361 | xid = get_xid(); |
1da177e4 | 2362 | |
35c265e0 AV |
2363 | cifs_dbg(FYI, "setattr on file %pd attrs->iavalid 0x%x\n", |
2364 | direntry, attrs->ia_valid); | |
6473a559 | 2365 | |
db78b877 CH |
2366 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2367 | attrs->ia_valid |= ATTR_FORCE; | |
2368 | ||
31051c85 | 2369 | rc = setattr_prepare(direntry, attrs); |
db78b877 | 2370 | if (rc < 0) { |
6d5786a3 | 2371 | free_xid(xid); |
db78b877 | 2372 | return rc; |
6473a559 | 2373 | } |
50c2f753 | 2374 | |
7f57356b | 2375 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 2376 | if (full_path == NULL) { |
0f3bc09e | 2377 | rc = -ENOMEM; |
6d5786a3 | 2378 | free_xid(xid); |
0f3bc09e | 2379 | return rc; |
1da177e4 | 2380 | } |
1da177e4 | 2381 | |
0f4d634c JL |
2382 | /* |
2383 | * Attempt to flush data before changing attributes. We need to do | |
2384 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2385 | * ownership or mode then we may also need to do this. Here, we take | |
2386 | * the safe way out and just do the flush on all setattr requests. If | |
2387 | * the flush returns error, store it to report later and continue. | |
2388 | * | |
2389 | * BB: This should be smarter. Why bother flushing pages that | |
2390 | * will be truncated anyway? Also, should we error out here if | |
2391 | * the flush returns error? | |
2392 | */ | |
2393 | rc = filemap_write_and_wait(inode->i_mapping); | |
eb4b756b JL |
2394 | mapping_set_error(inode->i_mapping, rc); |
2395 | rc = 0; | |
cea21805 | 2396 | |
50531444 | 2397 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2398 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2399 | if (rc != 0) | |
e30dcf3a | 2400 | goto cifs_setattr_exit; |
1da177e4 | 2401 | } |
4ca691a8 | 2402 | |
a5ff3769 SP |
2403 | if (attrs->ia_valid & ATTR_UID) |
2404 | uid = attrs->ia_uid; | |
2405 | ||
2406 | if (attrs->ia_valid & ATTR_GID) | |
2407 | gid = attrs->ia_gid; | |
2408 | ||
2409 | #ifdef CONFIG_CIFS_ACL | |
2410 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
8abf2775 | 2411 | if (uid_valid(uid) || gid_valid(gid)) { |
a5ff3769 SP |
2412 | rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, |
2413 | uid, gid); | |
2414 | if (rc) { | |
f96637be JP |
2415 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2416 | __func__, rc); | |
a5ff3769 SP |
2417 | goto cifs_setattr_exit; |
2418 | } | |
2419 | } | |
2420 | } else | |
2421 | #endif /* CONFIG_CIFS_ACL */ | |
3fe5c1dd | 2422 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2423 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2424 | |
d32c4f26 JL |
2425 | /* skip mode change if it's just for clearing setuid/setgid */ |
2426 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2427 | attrs->ia_valid &= ~ATTR_MODE; | |
2428 | ||
1da177e4 | 2429 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2430 | mode = attrs->ia_mode; |
cdbce9c8 | 2431 | rc = 0; |
79df1bae | 2432 | #ifdef CONFIG_CIFS_ACL |
78415d2d | 2433 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
a5ff3769 | 2434 | rc = id_mode_to_cifs_acl(inode, full_path, mode, |
8abf2775 | 2435 | INVALID_UID, INVALID_GID); |
78415d2d | 2436 | if (rc) { |
f96637be JP |
2437 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2438 | __func__, rc); | |
78415d2d SP |
2439 | goto cifs_setattr_exit; |
2440 | } | |
2441 | } else | |
79df1bae | 2442 | #endif /* CONFIG_CIFS_ACL */ |
5132861a JL |
2443 | if (((mode & S_IWUGO) == 0) && |
2444 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2445 | |
2446 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2447 | ||
5132861a JL |
2448 | /* fix up mode if we're not using dynperm */ |
2449 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2450 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2451 | } else if ((mode & S_IWUGO) && | |
2452 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2453 | |
2454 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2455 | /* Attributes of 0 are ignored */ | |
2456 | if (dosattr == 0) | |
2457 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2458 | |
2459 | /* reset local inode permissions to normal */ | |
2460 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2461 | attrs->ia_mode &= ~(S_IALLUGO); | |
2462 | if (S_ISDIR(inode->i_mode)) | |
2463 | attrs->ia_mode |= | |
2464 | cifs_sb->mnt_dir_mode; | |
2465 | else | |
2466 | attrs->ia_mode |= | |
2467 | cifs_sb->mnt_file_mode; | |
2468 | } | |
2469 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2470 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2471 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2472 | } |
1da177e4 LT |
2473 | } |
2474 | ||
feb3e20c JL |
2475 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2476 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2477 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2478 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2479 | |
e30dcf3a SF |
2480 | /* Even if error on time set, no sense failing the call if |
2481 | the server would set the time to a reasonable value anyway, | |
2482 | and this check ensures that we are not being called from | |
2483 | sys_utimes in which case we ought to fail the call back to | |
2484 | the user when the server rejects the call */ | |
fb8c4b14 | 2485 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2486 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2487 | rc = 0; |
1da177e4 LT |
2488 | } |
2489 | ||
2490 | /* do not need local check to inode_check_ok since the server does | |
2491 | that */ | |
1025774c CH |
2492 | if (rc) |
2493 | goto cifs_setattr_exit; | |
2494 | ||
2495 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2496 | attrs->ia_size != i_size_read(inode)) |
2497 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2498 | |
2499 | setattr_copy(inode, attrs); | |
2500 | mark_inode_dirty(inode); | |
1025774c | 2501 | |
e30dcf3a | 2502 | cifs_setattr_exit: |
1da177e4 | 2503 | kfree(full_path); |
6d5786a3 | 2504 | free_xid(xid); |
1da177e4 LT |
2505 | return rc; |
2506 | } | |
2507 | ||
0510eeb7 JL |
2508 | int |
2509 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2510 | { | |
fc64005c | 2511 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2512 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
0510eeb7 JL |
2513 | |
2514 | if (pTcon->unix_ext) | |
2515 | return cifs_setattr_unix(direntry, attrs); | |
2516 | ||
2517 | return cifs_setattr_nounix(direntry, attrs); | |
2518 | ||
2519 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2520 | } | |
2521 | ||
99ee4dbd | 2522 | #if 0 |
1da177e4 LT |
2523 | void cifs_delete_inode(struct inode *inode) |
2524 | { | |
f96637be | 2525 | cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode); |
1da177e4 LT |
2526 | /* may have to add back in if and when safe distributed caching of |
2527 | directories added e.g. via FindNotify */ | |
2528 | } | |
99ee4dbd | 2529 | #endif |