Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 | 22 | #include <linux/stat.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 | 24 | #include <linux/pagemap.h> |
4f73c7d3 | 25 | #include <linux/freezer.h> |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
5dd43ce2 | 27 | #include <linux/wait_bit.h> |
10c5db28 | 28 | #include <linux/fiemap.h> |
174cd4b1 | 29 | |
1da177e4 LT |
30 | #include <asm/div64.h> |
31 | #include "cifsfs.h" | |
32 | #include "cifspdu.h" | |
33 | #include "cifsglob.h" | |
34 | #include "cifsproto.h" | |
6a5f6592 | 35 | #include "smb2proto.h" |
1da177e4 LT |
36 | #include "cifs_debug.h" |
37 | #include "cifs_fs_sb.h" | |
2baa2682 | 38 | #include "cifs_unicode.h" |
9451a9a5 | 39 | #include "fscache.h" |
1da177e4 | 40 | |
70eff55d | 41 | |
01c64fea | 42 | static void cifs_set_ops(struct inode *inode) |
70eff55d CH |
43 | { |
44 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
45 | ||
46 | switch (inode->i_mode & S_IFMT) { | |
47 | case S_IFREG: | |
48 | inode->i_op = &cifs_file_inode_ops; | |
49 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
50 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
51 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
52 | else | |
53 | inode->i_fop = &cifs_file_direct_ops; | |
8be7e6ba PS |
54 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
55 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
56 | inode->i_fop = &cifs_file_strict_nobrl_ops; | |
57 | else | |
58 | inode->i_fop = &cifs_file_strict_ops; | |
70eff55d CH |
59 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
60 | inode->i_fop = &cifs_file_nobrl_ops; | |
61 | else { /* not direct, send byte range locks */ | |
62 | inode->i_fop = &cifs_file_ops; | |
63 | } | |
64 | ||
70eff55d | 65 | /* check if server can support readpages */ |
1f641d94 | 66 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < |
09cbfeaf | 67 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
70eff55d CH |
68 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
69 | else | |
70 | inode->i_data.a_ops = &cifs_addr_ops; | |
71 | break; | |
72 | case S_IFDIR: | |
bc5b6e24 | 73 | #ifdef CONFIG_CIFS_DFS_UPCALL |
01c64fea | 74 | if (IS_AUTOMOUNT(inode)) { |
7962670e IM |
75 | inode->i_op = &cifs_dfs_referral_inode_operations; |
76 | } else { | |
bc5b6e24 SF |
77 | #else /* NO DFS support, treat as a directory */ |
78 | { | |
79 | #endif | |
7962670e IM |
80 | inode->i_op = &cifs_dir_inode_ops; |
81 | inode->i_fop = &cifs_dir_ops; | |
82 | } | |
70eff55d CH |
83 | break; |
84 | case S_IFLNK: | |
85 | inode->i_op = &cifs_symlink_inode_ops; | |
86 | break; | |
87 | default: | |
88 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
89 | break; | |
90 | } | |
91 | } | |
92 | ||
df2cf170 JL |
93 | /* check inode attributes against fattr. If they don't match, tag the |
94 | * inode for cache invalidation | |
95 | */ | |
96 | static void | |
97 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
98 | { | |
99 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
100 | ||
f96637be JP |
101 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
102 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
103 | |
104 | if (inode->i_state & I_NEW) { | |
f96637be JP |
105 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
106 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
107 | return; |
108 | } | |
109 | ||
110 | /* don't bother with revalidation if we have an oplock */ | |
18cceb6a | 111 | if (CIFS_CACHE_READ(cifs_i)) { |
f96637be JP |
112 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
113 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
114 | return; |
115 | } | |
116 | ||
117 | /* revalidate if mtime or size have changed */ | |
918c9009 | 118 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
95390201 | 119 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
df2cf170 | 120 | cifs_i->server_eof == fattr->cf_eof) { |
f96637be JP |
121 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
122 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
123 | return; |
124 | } | |
125 | ||
f96637be JP |
126 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
127 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 128 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
129 | } |
130 | ||
74d290da JM |
131 | /* |
132 | * copy nlink to the inode, unless it wasn't provided. Provide | |
133 | * sane values if we don't have an existing one and none was provided | |
134 | */ | |
135 | static void | |
136 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
137 | { | |
138 | /* | |
139 | * if we're in a situation where we can't trust what we | |
140 | * got from the server (readdir, some non-unix cases) | |
141 | * fake reasonable values | |
142 | */ | |
143 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
144 | /* only provide fake values on a new inode */ | |
145 | if (inode->i_state & I_NEW) { | |
146 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
147 | set_nlink(inode, 2); | |
148 | else | |
149 | set_nlink(inode, 1); | |
150 | } | |
151 | return; | |
152 | } | |
153 | ||
154 | /* we trust the server, so update it */ | |
155 | set_nlink(inode, fattr->cf_nlink); | |
156 | } | |
157 | ||
cc0bad75 JL |
158 | /* populate an inode with info from a cifs_fattr struct */ |
159 | void | |
160 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 161 | { |
cc0bad75 | 162 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 163 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 164 | |
df2cf170 JL |
165 | cifs_revalidate_cache(inode, fattr); |
166 | ||
b7ca6928 | 167 | spin_lock(&inode->i_lock); |
918c9009 DD |
168 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
169 | fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); | |
170 | fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); | |
9b9c5bea | 171 | /* we do not want atime to be less than mtime, it broke some apps */ |
69738cfd | 172 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
9b9c5bea SF |
173 | inode->i_atime = fattr->cf_mtime; |
174 | else | |
175 | inode->i_atime = fattr->cf_atime; | |
95390201 AB |
176 | inode->i_mtime = fattr->cf_mtime; |
177 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 178 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 179 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
180 | inode->i_uid = fattr->cf_uid; |
181 | inode->i_gid = fattr->cf_gid; | |
182 | ||
0b8f18e3 JL |
183 | /* if dynperm is set, don't clobber existing mode */ |
184 | if (inode->i_state & I_NEW || | |
185 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
186 | inode->i_mode = fattr->cf_mode; | |
187 | ||
cc0bad75 | 188 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 189 | |
0b8f18e3 JL |
190 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
191 | cifs_i->time = 0; | |
192 | else | |
193 | cifs_i->time = jiffies; | |
194 | ||
aff8d5ca JL |
195 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
196 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
197 | else | |
198 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 199 | |
835a36ca | 200 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
201 | /* |
202 | * Can't safely change the file size here if the client is writing to | |
203 | * it due to potential races. | |
204 | */ | |
cc0bad75 JL |
205 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
206 | i_size_write(inode, fattr->cf_eof); | |
207 | ||
208 | /* | |
209 | * i_blocks is not related to (i_size / i_blksize), | |
210 | * but instead 512 byte (2**9) size is required for | |
211 | * calculating num blocks. | |
212 | */ | |
213 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
214 | } | |
215 | spin_unlock(&inode->i_lock); | |
216 | ||
01c64fea DH |
217 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
218 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
219 | if (inode->i_state & I_NEW) |
220 | cifs_set_ops(inode); | |
cc0bad75 JL |
221 | } |
222 | ||
4065c802 JL |
223 | void |
224 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
225 | { | |
226 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
227 | ||
228 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
229 | return; | |
230 | ||
231 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
232 | } | |
233 | ||
cc0bad75 JL |
234 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
235 | void | |
236 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
237 | struct cifs_sb_info *cifs_sb) | |
238 | { | |
239 | memset(fattr, 0, sizeof(*fattr)); | |
240 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
241 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
242 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
243 | ||
244 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
245 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
246 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
247 | /* old POSIX extensions don't get create time */ |
248 | ||
cc0bad75 | 249 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
250 | |
251 | /* | |
252 | * Since we set the inode type below we need to mask off | |
253 | * to avoid strange results if bits set above. | |
254 | */ | |
cc0bad75 | 255 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
256 | switch (le32_to_cpu(info->Type)) { |
257 | case UNIX_FILE: | |
cc0bad75 JL |
258 | fattr->cf_mode |= S_IFREG; |
259 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
260 | break; |
261 | case UNIX_SYMLINK: | |
cc0bad75 JL |
262 | fattr->cf_mode |= S_IFLNK; |
263 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
264 | break; |
265 | case UNIX_DIR: | |
cc0bad75 JL |
266 | fattr->cf_mode |= S_IFDIR; |
267 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
268 | break; |
269 | case UNIX_CHARDEV: | |
cc0bad75 JL |
270 | fattr->cf_mode |= S_IFCHR; |
271 | fattr->cf_dtype = DT_CHR; | |
272 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
273 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
274 | break; |
275 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
276 | fattr->cf_mode |= S_IFBLK; |
277 | fattr->cf_dtype = DT_BLK; | |
278 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
279 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
280 | break; |
281 | case UNIX_FIFO: | |
cc0bad75 JL |
282 | fattr->cf_mode |= S_IFIFO; |
283 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
284 | break; |
285 | case UNIX_SOCKET: | |
cc0bad75 JL |
286 | fattr->cf_mode |= S_IFSOCK; |
287 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
288 | break; |
289 | default: | |
290 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
291 | fattr->cf_mode |= S_IFREG; |
292 | fattr->cf_dtype = DT_REG; | |
f96637be | 293 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
294 | break; |
295 | } | |
296 | ||
46bbc25f EB |
297 | fattr->cf_uid = cifs_sb->mnt_uid; |
298 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { | |
299 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
300 | if (id < ((uid_t)-1)) { |
301 | kuid_t uid = make_kuid(&init_user_ns, id); | |
302 | if (uid_valid(uid)) | |
303 | fattr->cf_uid = uid; | |
304 | } | |
46bbc25f EB |
305 | } |
306 | ||
307 | fattr->cf_gid = cifs_sb->mnt_gid; | |
308 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { | |
309 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
310 | if (id < ((gid_t)-1)) { |
311 | kgid_t gid = make_kgid(&init_user_ns, id); | |
312 | if (gid_valid(gid)) | |
313 | fattr->cf_gid = gid; | |
314 | } | |
46bbc25f | 315 | } |
75f12983 | 316 | |
cc0bad75 | 317 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
318 | } |
319 | ||
b9a3260f | 320 | /* |
cc0bad75 JL |
321 | * Fill a cifs_fattr struct with fake inode info. |
322 | * | |
323 | * Needed to setup cifs_fattr data for the directory which is the | |
324 | * junction to the new submount (ie to setup the fake directory | |
325 | * which represents a DFS referral). | |
b9a3260f | 326 | */ |
f1230c97 | 327 | static void |
cc0bad75 | 328 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 329 | { |
cc0bad75 | 330 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 331 | |
f96637be | 332 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
333 | |
334 | memset(fattr, 0, sizeof(*fattr)); | |
335 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
336 | fattr->cf_uid = cifs_sb->mnt_uid; | |
337 | fattr->cf_gid = cifs_sb->mnt_gid; | |
918c9009 | 338 | ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
e37fea58 | 339 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
cc0bad75 | 340 | fattr->cf_nlink = 2; |
97aa495a | 341 | fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
0e4bbde9 SF |
342 | } |
343 | ||
4ad65044 PS |
344 | static int |
345 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
346 | { |
347 | int rc; | |
6d5786a3 | 348 | unsigned int xid; |
abab095d JL |
349 | FILE_UNIX_BASIC_INFO find_data; |
350 | struct cifs_fattr fattr; | |
496ad9aa | 351 | struct inode *inode = file_inode(filp); |
abab095d | 352 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 353 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 354 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 355 | |
6d5786a3 | 356 | xid = get_xid(); |
4b4de76e | 357 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
358 | if (!rc) { |
359 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
360 | } else if (rc == -EREMOTE) { | |
361 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
362 | rc = 0; | |
363 | } | |
364 | ||
365 | cifs_fattr_to_inode(inode, &fattr); | |
6d5786a3 | 366 | free_xid(xid); |
abab095d JL |
367 | return rc; |
368 | } | |
369 | ||
1da177e4 | 370 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 371 | const unsigned char *full_path, |
6d5786a3 | 372 | struct super_block *sb, unsigned int xid) |
1da177e4 | 373 | { |
cc0bad75 | 374 | int rc; |
0e4bbde9 | 375 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 376 | struct cifs_fattr fattr; |
96daf2b0 | 377 | struct cifs_tcon *tcon; |
7ffec372 | 378 | struct tcon_link *tlink; |
1da177e4 | 379 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 380 | |
f96637be | 381 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 382 | |
7ffec372 JL |
383 | tlink = cifs_sb_tlink(cifs_sb); |
384 | if (IS_ERR(tlink)) | |
385 | return PTR_ERR(tlink); | |
386 | tcon = tlink_tcon(tlink); | |
387 | ||
1da177e4 | 388 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 389 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 390 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 391 | cifs_put_tlink(tlink); |
e911d0cc | 392 | |
cc0bad75 JL |
393 | if (!rc) { |
394 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
395 | } else if (rc == -EREMOTE) { | |
396 | cifs_create_dfs_fattr(&fattr, sb); | |
397 | rc = 0; | |
398 | } else { | |
399 | return rc; | |
400 | } | |
1da177e4 | 401 | |
1b12b9c1 SM |
402 | /* check for Minshall+French symlinks */ |
403 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
404 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
405 | full_path); | |
1b12b9c1 | 406 | if (tmprc) |
cb084b1a | 407 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
408 | } |
409 | ||
0e4bbde9 | 410 | if (*pinode == NULL) { |
cc0bad75 | 411 | /* get new inode */ |
4065c802 | 412 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
413 | *pinode = cifs_iget(sb, &fattr); |
414 | if (!*pinode) | |
0e4bbde9 | 415 | rc = -ENOMEM; |
cc0bad75 JL |
416 | } else { |
417 | /* we already have inode, update it */ | |
7196ac11 NA |
418 | |
419 | /* if uniqueid is different, return error */ | |
420 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
421 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 422 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
423 | rc = -ESTALE; |
424 | goto cgiiu_exit; | |
425 | } | |
426 | ||
427 | /* if filetype is different, return error */ | |
428 | if (unlikely(((*pinode)->i_mode & S_IFMT) != | |
429 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 430 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
431 | rc = -ESTALE; |
432 | goto cgiiu_exit; | |
433 | } | |
434 | ||
cc0bad75 | 435 | cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 436 | } |
1da177e4 | 437 | |
7196ac11 | 438 | cgiiu_exit: |
1da177e4 LT |
439 | return rc; |
440 | } | |
441 | ||
0b8f18e3 | 442 | static int |
0360d605 | 443 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 444 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
445 | { |
446 | int rc; | |
db8b631d | 447 | __u32 oplock; |
7ffec372 | 448 | struct tcon_link *tlink; |
96daf2b0 | 449 | struct cifs_tcon *tcon; |
d81b8a40 PS |
450 | struct cifs_fid fid; |
451 | struct cifs_open_parms oparms; | |
7c06514a | 452 | struct cifs_io_parms io_parms = {0}; |
86c96b4b | 453 | char buf[24]; |
d6e2f2a4 | 454 | unsigned int bytes_read; |
fb8c4b14 | 455 | char *pbuf; |
0360d605 | 456 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
457 | |
458 | pbuf = buf; | |
459 | ||
0b8f18e3 JL |
460 | fattr->cf_mode &= ~S_IFMT; |
461 | ||
462 | if (fattr->cf_eof == 0) { | |
463 | fattr->cf_mode |= S_IFIFO; | |
464 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 465 | return 0; |
0b8f18e3 JL |
466 | } else if (fattr->cf_eof < 8) { |
467 | fattr->cf_mode |= S_IFREG; | |
468 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
469 | return -EINVAL; /* EOPNOTSUPP? */ |
470 | } | |
50c2f753 | 471 | |
7ffec372 JL |
472 | tlink = cifs_sb_tlink(cifs_sb); |
473 | if (IS_ERR(tlink)) | |
474 | return PTR_ERR(tlink); | |
475 | tcon = tlink_tcon(tlink); | |
476 | ||
d81b8a40 PS |
477 | oparms.tcon = tcon; |
478 | oparms.cifs_sb = cifs_sb; | |
479 | oparms.desired_access = GENERIC_READ; | |
0f060936 | 480 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
481 | oparms.disposition = FILE_OPEN; |
482 | oparms.path = path; | |
483 | oparms.fid = &fid; | |
484 | oparms.reconnect = false; | |
485 | ||
db8b631d SF |
486 | if (tcon->ses->server->oplocks) |
487 | oplock = REQ_OPLOCK; | |
488 | else | |
489 | oplock = 0; | |
490 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 491 | if (rc) { |
db8b631d | 492 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
493 | cifs_put_tlink(tlink); |
494 | return rc; | |
495 | } | |
496 | ||
497 | /* Read header */ | |
d81b8a40 | 498 | io_parms.netfid = fid.netfid; |
0360d605 PS |
499 | io_parms.pid = current->tgid; |
500 | io_parms.tcon = tcon; | |
501 | io_parms.offset = 0; | |
502 | io_parms.length = 24; | |
503 | ||
db8b631d SF |
504 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
505 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
506 | if ((rc == 0) && (bytes_read >= 8)) { |
507 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
508 | cifs_dbg(FYI, "Block device\n"); | |
509 | fattr->cf_mode |= S_IFBLK; | |
510 | fattr->cf_dtype = DT_BLK; | |
511 | if (bytes_read == 24) { | |
512 | /* we have enough to decode dev num */ | |
513 | __u64 mjr; /* major */ | |
514 | __u64 mnr; /* minor */ | |
515 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
516 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
517 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 518 | } |
0360d605 PS |
519 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
520 | cifs_dbg(FYI, "Char device\n"); | |
521 | fattr->cf_mode |= S_IFCHR; | |
522 | fattr->cf_dtype = DT_CHR; | |
523 | if (bytes_read == 24) { | |
524 | /* we have enough to decode dev num */ | |
525 | __u64 mjr; /* major */ | |
526 | __u64 mnr; /* minor */ | |
527 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
528 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
529 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
530 | } | |
531 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
532 | cifs_dbg(FYI, "Symlink\n"); | |
533 | fattr->cf_mode |= S_IFLNK; | |
534 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 535 | } else { |
0360d605 | 536 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 537 | fattr->cf_dtype = DT_REG; |
0360d605 | 538 | rc = -EOPNOTSUPP; |
fb8c4b14 | 539 | } |
0360d605 PS |
540 | } else { |
541 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
542 | fattr->cf_dtype = DT_REG; | |
543 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 544 | } |
db8b631d SF |
545 | |
546 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 547 | cifs_put_tlink(tlink); |
d6e2f2a4 | 548 | return rc; |
d6e2f2a4 SF |
549 | } |
550 | ||
9e294f1c SF |
551 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
552 | ||
0b8f18e3 JL |
553 | /* |
554 | * Fetch mode bits as provided by SFU. | |
555 | * | |
556 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
557 | */ | |
558 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 559 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 560 | { |
3020a1f5 | 561 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
562 | ssize_t rc; |
563 | char ea_value[4]; | |
564 | __u32 mode; | |
7ffec372 | 565 | struct tcon_link *tlink; |
96daf2b0 | 566 | struct cifs_tcon *tcon; |
7ffec372 JL |
567 | |
568 | tlink = cifs_sb_tlink(cifs_sb); | |
569 | if (IS_ERR(tlink)) | |
570 | return PTR_ERR(tlink); | |
571 | tcon = tlink_tcon(tlink); | |
9e294f1c | 572 | |
d979f3b0 SF |
573 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
574 | cifs_put_tlink(tlink); | |
575 | return -EOPNOTSUPP; | |
576 | } | |
577 | ||
578 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
579 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 580 | cifs_sb); |
7ffec372 | 581 | cifs_put_tlink(tlink); |
4523cc30 | 582 | if (rc < 0) |
9e294f1c SF |
583 | return (int)rc; |
584 | else if (rc > 3) { | |
585 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 586 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
587 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
588 | mode, fattr->cf_mode); | |
0b8f18e3 | 589 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 590 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 591 | } |
0b8f18e3 JL |
592 | |
593 | return 0; | |
3020a1f5 SF |
594 | #else |
595 | return -EOPNOTSUPP; | |
596 | #endif | |
9e294f1c SF |
597 | } |
598 | ||
6a5f6592 SF |
599 | /* Fill a cifs_fattr struct with info from POSIX info struct */ |
600 | static void | |
601 | smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info, | |
602 | struct super_block *sb, bool adjust_tz, bool symlink) | |
603 | { | |
604 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
605 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
606 | ||
607 | memset(fattr, 0, sizeof(*fattr)); | |
608 | ||
609 | /* no fattr->flags to set */ | |
610 | fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); | |
611 | fattr->cf_uniqueid = le64_to_cpu(info->Inode); | |
612 | ||
613 | if (info->LastAccessTime) | |
614 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
615 | else | |
616 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
617 | ||
618 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
619 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
620 | ||
621 | if (adjust_tz) { | |
622 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; | |
623 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
624 | } | |
625 | ||
626 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
627 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
628 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); | |
629 | ||
630 | fattr->cf_nlink = le32_to_cpu(info->HardLinks); | |
631 | fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode); | |
632 | /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */ | |
633 | /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */ | |
634 | ||
635 | if (symlink) { | |
636 | fattr->cf_mode |= S_IFLNK; | |
637 | fattr->cf_dtype = DT_LNK; | |
638 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
639 | fattr->cf_mode |= S_IFDIR; | |
640 | fattr->cf_dtype = DT_DIR; | |
641 | } else { /* file */ | |
642 | fattr->cf_mode |= S_IFREG; | |
643 | fattr->cf_dtype = DT_REG; | |
644 | } | |
645 | /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */ | |
646 | ||
647 | fattr->cf_uid = cifs_sb->mnt_uid; /* TODO: map uid and gid from SID */ | |
648 | fattr->cf_gid = cifs_sb->mnt_gid; | |
649 | ||
650 | cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n", | |
651 | fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); | |
652 | } | |
653 | ||
654 | ||
0b8f18e3 | 655 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 656 | static void |
0b8f18e3 | 657 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 658 | struct super_block *sb, bool adjust_tz, |
eb85d94b | 659 | bool symlink) |
b9a3260f | 660 | { |
e37fea58 | 661 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 662 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 663 | |
0b8f18e3 JL |
664 | memset(fattr, 0, sizeof(*fattr)); |
665 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
666 | if (info->DeletePending) | |
667 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
668 | ||
669 | if (info->LastAccessTime) | |
670 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
918c9009 DD |
671 | else |
672 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
0b8f18e3 JL |
673 | |
674 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
675 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
676 | ||
677 | if (adjust_tz) { | |
0d424ad0 JL |
678 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
679 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
680 | } |
681 | ||
682 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
683 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 684 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 685 | |
74d290da | 686 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
eb85d94b PS |
687 | |
688 | if (symlink) { | |
689 | fattr->cf_mode = S_IFLNK; | |
690 | fattr->cf_dtype = DT_LNK; | |
691 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
0b8f18e3 JL |
692 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
693 | fattr->cf_dtype = DT_DIR; | |
6de2ce42 PS |
694 | /* |
695 | * Server can return wrong NumberOfLinks value for directories | |
696 | * when Unix extensions are disabled - fake it. | |
697 | */ | |
74d290da JM |
698 | if (!tcon->unix_ext) |
699 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 JL |
700 | } else { |
701 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
702 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 703 | |
d0c280d2 JL |
704 | /* clear write bits if ATTR_READONLY is set */ |
705 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
706 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 707 | |
74d290da JM |
708 | /* |
709 | * Don't accept zero nlink from non-unix servers unless | |
710 | * delete is pending. Instead mark it as unknown. | |
711 | */ | |
712 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
713 | !info->DeletePending) { | |
fb4b5f13 JP |
714 | cifs_dbg(VFS, "bogus file nlink value %u\n", |
715 | fattr->cf_nlink); | |
74d290da | 716 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 717 | } |
6de2ce42 | 718 | } |
0b8f18e3 JL |
719 | |
720 | fattr->cf_uid = cifs_sb->mnt_uid; | |
721 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
722 | } |
723 | ||
4ad65044 PS |
724 | static int |
725 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
726 | { |
727 | int rc; | |
6d5786a3 | 728 | unsigned int xid; |
abab095d JL |
729 | FILE_ALL_INFO find_data; |
730 | struct cifs_fattr fattr; | |
496ad9aa | 731 | struct inode *inode = file_inode(filp); |
c21dfb69 | 732 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 733 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
734 | struct TCP_Server_Info *server = tcon->ses->server; |
735 | ||
736 | if (!server->ops->query_file_info) | |
737 | return -ENOSYS; | |
abab095d | 738 | |
6d5786a3 | 739 | xid = get_xid(); |
4ad65044 | 740 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
741 | switch (rc) { |
742 | case 0: | |
e37fea58 | 743 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
eb85d94b | 744 | false); |
42274bb2 PS |
745 | break; |
746 | case -EREMOTE: | |
747 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
748 | rc = 0; | |
749 | break; | |
750 | case -EOPNOTSUPP: | |
751 | case -EINVAL: | |
abab095d JL |
752 | /* |
753 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
754 | * for now, just skip revalidating and mark inode for |
755 | * immediate reval. | |
756 | */ | |
abab095d JL |
757 | rc = 0; |
758 | CIFS_I(inode)->time = 0; | |
42274bb2 | 759 | default: |
abab095d | 760 | goto cgfi_exit; |
42274bb2 | 761 | } |
abab095d JL |
762 | |
763 | /* | |
764 | * don't bother with SFU junk here -- just mark inode as needing | |
765 | * revalidation. | |
766 | */ | |
abab095d JL |
767 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
768 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
769 | cifs_fattr_to_inode(inode, &fattr); | |
770 | cgfi_exit: | |
6d5786a3 | 771 | free_xid(xid); |
abab095d JL |
772 | return rc; |
773 | } | |
774 | ||
7ea884c7 SF |
775 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
776 | static __u64 simple_hashstr(const char *str) | |
777 | { | |
3995bbf5 | 778 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
7ea884c7 SF |
779 | __u64 hash = 0; |
780 | ||
781 | while (*str) | |
782 | hash = (hash + (__u64) *str++) * hash_mult; | |
783 | ||
784 | return hash; | |
785 | } | |
786 | ||
b8f7442b AA |
787 | /** |
788 | * cifs_backup_query_path_info - SMB1 fallback code to get ino | |
789 | * | |
790 | * Fallback code to get file metadata when we don't have access to | |
3dc58df0 | 791 | * @full_path (EACCES) and have backup creds. |
b8f7442b AA |
792 | * |
793 | * @data will be set to search info result buffer | |
794 | * @resp_buf will be set to cifs resp buf and needs to be freed with | |
795 | * cifs_buf_release() when done with @data. | |
796 | */ | |
797 | static int | |
798 | cifs_backup_query_path_info(int xid, | |
799 | struct cifs_tcon *tcon, | |
800 | struct super_block *sb, | |
801 | const char *full_path, | |
802 | void **resp_buf, | |
803 | FILE_ALL_INFO **data) | |
804 | { | |
805 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
806 | struct cifs_search_info info = {0}; | |
807 | u16 flags; | |
808 | int rc; | |
809 | ||
810 | *resp_buf = NULL; | |
811 | info.endOfSearch = false; | |
812 | if (tcon->unix_ext) | |
813 | info.info_level = SMB_FIND_FILE_UNIX; | |
814 | else if ((tcon->ses->capabilities & | |
815 | tcon->ses->server->vals->cap_nt_find) == 0) | |
816 | info.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
817 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
818 | info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
819 | else /* no srvino useful for fallback to some netapp */ | |
820 | info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
821 | ||
822 | flags = CIFS_SEARCH_CLOSE_ALWAYS | | |
823 | CIFS_SEARCH_CLOSE_AT_END | | |
824 | CIFS_SEARCH_BACKUP_SEARCH; | |
825 | ||
826 | rc = CIFSFindFirst(xid, tcon, full_path, | |
827 | cifs_sb, NULL, flags, &info, false); | |
828 | if (rc) | |
829 | return rc; | |
830 | ||
831 | *resp_buf = (void *)info.ntwrk_buf_start; | |
832 | *data = (FILE_ALL_INFO *)info.srch_entries_start; | |
833 | return 0; | |
834 | } | |
835 | ||
836 | static void | |
837 | cifs_set_fattr_ino(int xid, | |
838 | struct cifs_tcon *tcon, | |
839 | struct super_block *sb, | |
840 | struct inode **inode, | |
841 | const char *full_path, | |
842 | FILE_ALL_INFO *data, | |
843 | struct cifs_fattr *fattr) | |
844 | { | |
845 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
846 | struct TCP_Server_Info *server = tcon->ses->server; | |
847 | int rc; | |
848 | ||
849 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
850 | if (*inode) | |
851 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
852 | else | |
853 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
854 | return; | |
855 | } | |
856 | ||
857 | /* | |
858 | * If we have an inode pass a NULL tcon to ensure we don't | |
859 | * make a round trip to the server. This only works for SMB2+. | |
860 | */ | |
861 | rc = server->ops->get_srv_inum(xid, | |
862 | *inode ? NULL : tcon, | |
863 | cifs_sb, full_path, | |
864 | &fattr->cf_uniqueid, | |
865 | data); | |
866 | if (rc) { | |
867 | /* | |
868 | * If that fails reuse existing ino or generate one | |
869 | * and disable server ones | |
870 | */ | |
871 | if (*inode) | |
872 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
873 | else { | |
874 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
875 | cifs_autodisable_serverino(cifs_sb); | |
876 | } | |
877 | return; | |
878 | } | |
879 | ||
880 | /* If no errors, check for zero root inode (invalid) */ | |
881 | if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { | |
882 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
883 | if (*inode) { | |
884 | /* reuse */ | |
885 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
886 | } else { | |
887 | /* make an ino by hashing the UNC */ | |
888 | fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; | |
889 | fattr->cf_uniqueid = simple_hashstr(tcon->treeName); | |
890 | } | |
891 | } | |
892 | } | |
893 | ||
894 | static inline bool is_inode_cache_good(struct inode *ino) | |
895 | { | |
896 | return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; | |
897 | } | |
898 | ||
1208ef1f | 899 | int |
b8f7442b AA |
900 | cifs_get_inode_info(struct inode **inode, |
901 | const char *full_path, | |
902 | FILE_ALL_INFO *in_data, | |
903 | struct super_block *sb, int xid, | |
42eacf9e | 904 | const struct cifs_fid *fid) |
1da177e4 | 905 | { |
b8f7442b | 906 | |
1208ef1f PS |
907 | struct cifs_tcon *tcon; |
908 | struct TCP_Server_Info *server; | |
7ffec372 | 909 | struct tcon_link *tlink; |
1da177e4 | 910 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1208ef1f | 911 | bool adjust_tz = false; |
b8f7442b | 912 | struct cifs_fattr fattr = {0}; |
eb85d94b | 913 | bool symlink = false; |
b8f7442b AA |
914 | FILE_ALL_INFO *data = in_data; |
915 | FILE_ALL_INFO *tmp_data = NULL; | |
916 | void *smb1_backup_rsp_buf = NULL; | |
917 | int rc = 0; | |
918 | int tmprc = 0; | |
1da177e4 | 919 | |
7ffec372 JL |
920 | tlink = cifs_sb_tlink(cifs_sb); |
921 | if (IS_ERR(tlink)) | |
922 | return PTR_ERR(tlink); | |
1208ef1f PS |
923 | tcon = tlink_tcon(tlink); |
924 | server = tcon->ses->server; | |
7ffec372 | 925 | |
b8f7442b AA |
926 | /* |
927 | * 1. Fetch file metadata if not provided (data) | |
928 | */ | |
1da177e4 | 929 | |
b8f7442b AA |
930 | if (!data) { |
931 | if (is_inode_cache_good(*inode)) { | |
f96637be | 932 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
b8f7442b | 933 | goto out; |
1da177e4 | 934 | } |
b8f7442b AA |
935 | tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
936 | if (!tmp_data) { | |
7ffec372 | 937 | rc = -ENOMEM; |
b8f7442b | 938 | goto out; |
7ffec372 | 939 | } |
b8f7442b AA |
940 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
941 | full_path, tmp_data, | |
942 | &adjust_tz, &symlink); | |
943 | data = tmp_data; | |
1da177e4 | 944 | } |
0b8f18e3 | 945 | |
b8f7442b AA |
946 | /* |
947 | * 2. Convert it to internal cifs metadata (fattr) | |
948 | */ | |
949 | ||
950 | switch (rc) { | |
951 | case 0: | |
952 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); | |
953 | break; | |
954 | case -EREMOTE: | |
955 | /* DFS link, no metadata available on this server */ | |
0b8f18e3 | 956 | cifs_create_dfs_fattr(&fattr, sb); |
b9a3260f | 957 | rc = 0; |
b8f7442b AA |
958 | break; |
959 | case -EACCES: | |
3b7960ca | 960 | /* |
b8f7442b AA |
961 | * perm errors, try again with backup flags if possible |
962 | * | |
963 | * For SMB2 and later the backup intent flag | |
964 | * is already sent if needed on open and there | |
965 | * is no path based FindFirst operation to use | |
966 | * to retry with | |
3b7960ca | 967 | */ |
b8f7442b AA |
968 | if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
969 | /* for easier reading */ | |
970 | FILE_DIRECTORY_INFO *fdi; | |
971 | SEARCH_ID_FULL_DIR_INFO *si; | |
972 | ||
973 | rc = cifs_backup_query_path_info(xid, tcon, sb, | |
974 | full_path, | |
975 | &smb1_backup_rsp_buf, | |
976 | &data); | |
977 | if (rc) | |
978 | goto out; | |
979 | ||
980 | fdi = (FILE_DIRECTORY_INFO *)data; | |
981 | si = (SEARCH_ID_FULL_DIR_INFO *)data; | |
982 | ||
983 | cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); | |
984 | fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); | |
985 | /* uniqueid set, skip get inum step */ | |
986 | goto handle_mnt_opt; | |
987 | } else { | |
988 | /* nothing we can do, bail out */ | |
989 | goto out; | |
3b7960ca | 990 | } |
b8f7442b AA |
991 | break; |
992 | default: | |
993 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
994 | goto out; | |
995 | } | |
c052e2b4 | 996 | |
b8f7442b AA |
997 | /* |
998 | * 3. Get or update inode number (fattr.cf_uniqueid) | |
999 | */ | |
1000 | ||
1001 | cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); | |
1da177e4 | 1002 | |
0b8f18e3 | 1003 | /* |
b8f7442b | 1004 | * 4. Tweak fattr based on mount options |
0b8f18e3 | 1005 | */ |
b9a3260f | 1006 | |
b8f7442b | 1007 | handle_mnt_opt: |
0b8f18e3 JL |
1008 | /* query for SFU type info if supported and needed */ |
1009 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
1010 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
1011 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
1012 | if (tmprc) | |
f96637be | 1013 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 1014 | } |
1da177e4 | 1015 | |
b9a3260f | 1016 | /* fill in 0777 bits from ACL */ |
e2f8fbfb SF |
1017 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
1018 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, | |
1019 | full_path, fid); | |
1020 | if (rc) { | |
1021 | cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", | |
b8f7442b AA |
1022 | __func__, rc); |
1023 | goto out; | |
e2f8fbfb SF |
1024 | } |
1025 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
1026 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, | |
68464b88 DC |
1027 | full_path, fid); |
1028 | if (rc) { | |
f96637be JP |
1029 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
1030 | __func__, rc); | |
b8f7442b | 1031 | goto out; |
78415d2d | 1032 | } |
b9a3260f | 1033 | } |
b9a3260f | 1034 | |
0b8f18e3 JL |
1035 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
1036 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
1037 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 1038 | |
1b12b9c1 SM |
1039 | /* check for Minshall+French symlinks */ |
1040 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
1041 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
1042 | full_path); | |
1b12b9c1 | 1043 | if (tmprc) |
cb084b1a | 1044 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
1045 | } |
1046 | ||
b8f7442b AA |
1047 | /* |
1048 | * 5. Update inode with final fattr data | |
1049 | */ | |
1050 | ||
1208ef1f PS |
1051 | if (!*inode) { |
1052 | *inode = cifs_iget(sb, &fattr); | |
1053 | if (!*inode) | |
0b8f18e3 JL |
1054 | rc = -ENOMEM; |
1055 | } else { | |
7196ac11 NA |
1056 | /* we already have inode, update it */ |
1057 | ||
a108471b RL |
1058 | /* if uniqueid is different, return error */ |
1059 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1060 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 1061 | CIFS_I(*inode)->time = 0; /* force reval */ |
a108471b | 1062 | rc = -ESTALE; |
b8f7442b | 1063 | goto out; |
a108471b RL |
1064 | } |
1065 | ||
7196ac11 NA |
1066 | /* if filetype is different, return error */ |
1067 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
1068 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 1069 | CIFS_I(*inode)->time = 0; /* force reval */ |
7196ac11 | 1070 | rc = -ESTALE; |
b8f7442b | 1071 | goto out; |
7196ac11 NA |
1072 | } |
1073 | ||
1208ef1f | 1074 | cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 1075 | } |
b8f7442b AA |
1076 | out: |
1077 | cifs_buf_release(smb1_backup_rsp_buf); | |
7ffec372 | 1078 | cifs_put_tlink(tlink); |
b8f7442b | 1079 | kfree(tmp_data); |
1da177e4 LT |
1080 | return rc; |
1081 | } | |
1082 | ||
6a5f6592 SF |
1083 | int |
1084 | smb311_posix_get_inode_info(struct inode **inode, | |
1085 | const char *full_path, | |
1086 | struct super_block *sb, unsigned int xid) | |
1087 | { | |
1088 | struct cifs_tcon *tcon; | |
6a5f6592 SF |
1089 | struct tcon_link *tlink; |
1090 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1091 | bool adjust_tz = false; | |
1092 | struct cifs_fattr fattr = {0}; | |
1093 | bool symlink = false; | |
1094 | struct smb311_posix_qinfo *data = NULL; | |
1095 | int rc = 0; | |
1096 | int tmprc = 0; | |
1097 | ||
1098 | tlink = cifs_sb_tlink(cifs_sb); | |
1099 | if (IS_ERR(tlink)) | |
1100 | return PTR_ERR(tlink); | |
1101 | tcon = tlink_tcon(tlink); | |
6a5f6592 SF |
1102 | |
1103 | /* | |
1104 | * 1. Fetch file metadata | |
1105 | */ | |
1106 | ||
1107 | if (is_inode_cache_good(*inode)) { | |
1108 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); | |
1109 | goto out; | |
1110 | } | |
1111 | data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL); | |
1112 | if (!data) { | |
1113 | rc = -ENOMEM; | |
1114 | goto out; | |
1115 | } | |
1116 | ||
1117 | rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, | |
1118 | full_path, data, | |
1119 | &adjust_tz, &symlink); | |
1120 | ||
1121 | /* | |
1122 | * 2. Convert it to internal cifs metadata (fattr) | |
1123 | */ | |
1124 | ||
1125 | switch (rc) { | |
1126 | case 0: | |
1127 | smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); | |
1128 | break; | |
1129 | case -EREMOTE: | |
1130 | /* DFS link, no metadata available on this server */ | |
1131 | cifs_create_dfs_fattr(&fattr, sb); | |
1132 | rc = 0; | |
1133 | break; | |
1134 | case -EACCES: | |
1135 | /* | |
1136 | * For SMB2 and later the backup intent flag | |
1137 | * is already sent if needed on open and there | |
1138 | * is no path based FindFirst operation to use | |
1139 | * to retry with so nothing we can do, bail out | |
1140 | */ | |
1141 | goto out; | |
1142 | default: | |
1143 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
1144 | goto out; | |
1145 | } | |
1146 | ||
1147 | ||
1148 | /* | |
a7a519a4 | 1149 | * 3. Tweak fattr based on mount options |
6a5f6592 SF |
1150 | */ |
1151 | ||
1152 | /* check for Minshall+French symlinks */ | |
1153 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
1154 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, | |
1155 | full_path); | |
1156 | if (tmprc) | |
1157 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); | |
1158 | } | |
1159 | ||
1160 | /* | |
a7a519a4 | 1161 | * 4. Update inode with final fattr data |
6a5f6592 SF |
1162 | */ |
1163 | ||
1164 | if (!*inode) { | |
1165 | *inode = cifs_iget(sb, &fattr); | |
1166 | if (!*inode) | |
1167 | rc = -ENOMEM; | |
1168 | } else { | |
1169 | /* we already have inode, update it */ | |
1170 | ||
1171 | /* if uniqueid is different, return error */ | |
1172 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1173 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
1174 | CIFS_I(*inode)->time = 0; /* force reval */ | |
1175 | rc = -ESTALE; | |
1176 | goto out; | |
1177 | } | |
1178 | ||
1179 | /* if filetype is different, return error */ | |
1180 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
1181 | (fattr.cf_mode & S_IFMT))) { | |
1182 | CIFS_I(*inode)->time = 0; /* force reval */ | |
1183 | rc = -ESTALE; | |
1184 | goto out; | |
1185 | } | |
1186 | ||
1187 | cifs_fattr_to_inode(*inode, &fattr); | |
1188 | } | |
1189 | out: | |
1190 | cifs_put_tlink(tlink); | |
1191 | kfree(data); | |
1192 | return rc; | |
1193 | } | |
1194 | ||
1195 | ||
7f8ed420 SF |
1196 | static const struct inode_operations cifs_ipc_inode_ops = { |
1197 | .lookup = cifs_lookup, | |
1198 | }; | |
1199 | ||
cc0bad75 JL |
1200 | static int |
1201 | cifs_find_inode(struct inode *inode, void *opaque) | |
1202 | { | |
1203 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1204 | ||
f30b9c11 | 1205 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
1206 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
1207 | return 0; | |
1208 | ||
20054bd6 JL |
1209 | /* use createtime like an i_generation field */ |
1210 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
1211 | return 0; | |
1212 | ||
f30b9c11 JL |
1213 | /* don't match inode of different type */ |
1214 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
1215 | return 0; | |
1216 | ||
5acfec25 | 1217 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 1218 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 1219 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 1220 | |
cc0bad75 JL |
1221 | return 1; |
1222 | } | |
1223 | ||
1224 | static int | |
1225 | cifs_init_inode(struct inode *inode, void *opaque) | |
1226 | { | |
1227 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1228 | ||
1229 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 1230 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
1231 | return 0; |
1232 | } | |
1233 | ||
5acfec25 JL |
1234 | /* |
1235 | * walk dentry list for an inode and report whether it has aliases that | |
1236 | * are hashed. We use this to determine if a directory inode can actually | |
1237 | * be used. | |
1238 | */ | |
1239 | static bool | |
1240 | inode_has_hashed_dentries(struct inode *inode) | |
1241 | { | |
1242 | struct dentry *dentry; | |
1243 | ||
873feea0 | 1244 | spin_lock(&inode->i_lock); |
946e51f2 | 1245 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1246 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1247 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1248 | return true; |
1249 | } | |
1250 | } | |
873feea0 | 1251 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1252 | return false; |
1253 | } | |
1254 | ||
cc0bad75 JL |
1255 | /* Given fattrs, get a corresponding inode */ |
1256 | struct inode * | |
1257 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1258 | { | |
1259 | unsigned long hash; | |
1260 | struct inode *inode; | |
1261 | ||
3d694380 | 1262 | retry_iget5_locked: |
f96637be | 1263 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1264 | |
1265 | /* hash down to 32-bits on 32-bit arch */ | |
1266 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1267 | ||
1268 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1269 | if (inode) { |
5acfec25 | 1270 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1271 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1272 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1273 | |
1274 | if (inode_has_hashed_dentries(inode)) { | |
1275 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1276 | iput(inode); | |
1277 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1278 | goto retry_iget5_locked; | |
1279 | } | |
3d694380 JL |
1280 | } |
1281 | ||
cc0bad75 | 1282 | cifs_fattr_to_inode(inode, fattr); |
1751e8a6 | 1283 | if (sb->s_flags & SB_NOATIME) |
cc0bad75 JL |
1284 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
1285 | if (inode->i_state & I_NEW) { | |
1286 | inode->i_ino = hash; | |
0ccd4802 | 1287 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1288 | /* initialize per-inode cache cookie pointer */ |
1289 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1290 | #endif |
cc0bad75 JL |
1291 | unlock_new_inode(inode); |
1292 | } | |
1293 | } | |
1294 | ||
1295 | return inode; | |
1296 | } | |
1297 | ||
1da177e4 | 1298 | /* gets root inode */ |
9b6763e0 | 1299 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1300 | { |
6d5786a3 | 1301 | unsigned int xid; |
0d424ad0 | 1302 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1303 | struct inode *inode = NULL; |
ce634ab2 | 1304 | long rc; |
96daf2b0 | 1305 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1306 | char *path = NULL; |
1307 | int len; | |
1308 | ||
1309 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1310 | && cifs_sb->prepath) { | |
1311 | len = strlen(cifs_sb->prepath); | |
1312 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1313 | if (path == NULL) | |
1314 | return ERR_PTR(-ENOMEM); | |
1315 | path[0] = '/'; | |
1316 | memcpy(path+1, cifs_sb->prepath, len); | |
1317 | } else { | |
1318 | path = kstrdup("", GFP_KERNEL); | |
1319 | if (path == NULL) | |
1320 | return ERR_PTR(-ENOMEM); | |
1321 | } | |
ce634ab2 | 1322 | |
6d5786a3 | 1323 | xid = get_xid(); |
b5b374ea | 1324 | if (tcon->unix_ext) { |
a6b5058f | 1325 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1326 | /* some servers mistakenly claim POSIX support */ |
1327 | if (rc != -EOPNOTSUPP) | |
1328 | goto iget_no_retry; | |
a0a3036b | 1329 | cifs_dbg(VFS, "server does not support POSIX extensions\n"); |
b5b374ea SF |
1330 | tcon->unix_ext = false; |
1331 | } | |
1332 | ||
a6b5058f | 1333 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
d313852d SF |
1334 | if (tcon->posix_extensions) |
1335 | rc = smb311_posix_get_inode_info(&inode, path, sb, xid); | |
1336 | else | |
1337 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1338 | |
b5b374ea | 1339 | iget_no_retry: |
a7851ce7 OS |
1340 | if (!inode) { |
1341 | inode = ERR_PTR(rc); | |
1342 | goto out; | |
1343 | } | |
cc0bad75 | 1344 | |
0ccd4802 | 1345 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1346 | /* populate tcon->resource_id */ |
0d424ad0 | 1347 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1348 | #endif |
d03382ce | 1349 | |
b327a717 | 1350 | if (rc && tcon->pipe) { |
f96637be | 1351 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1352 | spin_lock(&inode->i_lock); |
7f8ed420 | 1353 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1354 | set_nlink(inode, 2); |
7f8ed420 SF |
1355 | inode->i_op = &cifs_ipc_inode_ops; |
1356 | inode->i_fop = &simple_dir_operations; | |
1357 | inode->i_uid = cifs_sb->mnt_uid; | |
1358 | inode->i_gid = cifs_sb->mnt_gid; | |
b7ca6928 | 1359 | spin_unlock(&inode->i_lock); |
ad661334 | 1360 | } else if (rc) { |
ce634ab2 | 1361 | iget_failed(inode); |
a7851ce7 | 1362 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1363 | } |
1364 | ||
a7851ce7 | 1365 | out: |
a6b5058f | 1366 | kfree(path); |
31cd106b | 1367 | free_xid(xid); |
ce634ab2 | 1368 | return inode; |
1da177e4 LT |
1369 | } |
1370 | ||
ed6875e0 | 1371 | int |
6d5786a3 | 1372 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
ed6875e0 | 1373 | char *full_path, __u32 dosattr) |
388e57b2 | 1374 | { |
388e57b2 | 1375 | bool set_time = false; |
388e57b2 | 1376 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1377 | struct TCP_Server_Info *server; |
388e57b2 SF |
1378 | FILE_BASIC_INFO info_buf; |
1379 | ||
1adcb710 SF |
1380 | if (attrs == NULL) |
1381 | return -EINVAL; | |
1382 | ||
6bdf6dbd PS |
1383 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1384 | if (!server->ops->set_file_info) | |
1385 | return -ENOSYS; | |
1386 | ||
fd09b7d3 SF |
1387 | info_buf.Pad = 0; |
1388 | ||
388e57b2 SF |
1389 | if (attrs->ia_valid & ATTR_ATIME) { |
1390 | set_time = true; | |
1391 | info_buf.LastAccessTime = | |
95390201 | 1392 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
388e57b2 SF |
1393 | } else |
1394 | info_buf.LastAccessTime = 0; | |
1395 | ||
1396 | if (attrs->ia_valid & ATTR_MTIME) { | |
1397 | set_time = true; | |
1398 | info_buf.LastWriteTime = | |
95390201 | 1399 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
388e57b2 SF |
1400 | } else |
1401 | info_buf.LastWriteTime = 0; | |
1402 | ||
1403 | /* | |
1404 | * Samba throws this field away, but windows may actually use it. | |
1405 | * Do not set ctime unless other time stamps are changed explicitly | |
1406 | * (i.e. by utimes()) since we would then have a mix of client and | |
1407 | * server times. | |
1408 | */ | |
1409 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1410 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 | 1411 | info_buf.ChangeTime = |
95390201 | 1412 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
388e57b2 SF |
1413 | } else |
1414 | info_buf.ChangeTime = 0; | |
1415 | ||
1416 | info_buf.CreationTime = 0; /* don't change */ | |
1417 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1418 | ||
6bdf6dbd | 1419 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1420 | } |
1421 | ||
a12a1ac7 | 1422 | /* |
ed6875e0 | 1423 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1424 | * and rename it to a random name that hopefully won't conflict with |
1425 | * anything else. | |
1426 | */ | |
ed6875e0 PS |
1427 | int |
1428 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1429 | const unsigned int xid) | |
a12a1ac7 JL |
1430 | { |
1431 | int oplock = 0; | |
1432 | int rc; | |
d81b8a40 PS |
1433 | struct cifs_fid fid; |
1434 | struct cifs_open_parms oparms; | |
2b0143b5 | 1435 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1436 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1437 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1438 | struct tcon_link *tlink; |
96daf2b0 | 1439 | struct cifs_tcon *tcon; |
3270958b SF |
1440 | __u32 dosattr, origattr; |
1441 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1442 | |
7ffec372 JL |
1443 | tlink = cifs_sb_tlink(cifs_sb); |
1444 | if (IS_ERR(tlink)) | |
1445 | return PTR_ERR(tlink); | |
1446 | tcon = tlink_tcon(tlink); | |
1447 | ||
c483a984 SP |
1448 | /* |
1449 | * We cannot rename the file if the server doesn't support | |
1450 | * CAP_INFOLEVEL_PASSTHRU | |
1451 | */ | |
1452 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1453 | rc = -EBUSY; | |
1454 | goto out; | |
1455 | } | |
1456 | ||
d81b8a40 PS |
1457 | oparms.tcon = tcon; |
1458 | oparms.cifs_sb = cifs_sb; | |
1459 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
0f060936 | 1460 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
1461 | oparms.disposition = FILE_OPEN; |
1462 | oparms.path = full_path; | |
1463 | oparms.fid = &fid; | |
1464 | oparms.reconnect = false; | |
1465 | ||
1466 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1467 | if (rc != 0) |
1468 | goto out; | |
1469 | ||
3270958b SF |
1470 | origattr = cifsInode->cifsAttrs; |
1471 | if (origattr == 0) | |
1472 | origattr |= ATTR_NORMAL; | |
1473 | ||
1474 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1475 | if (dosattr == 0) |
1476 | dosattr |= ATTR_NORMAL; | |
1477 | dosattr |= ATTR_HIDDEN; | |
1478 | ||
3270958b SF |
1479 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1480 | if (dosattr != origattr) { | |
1481 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1482 | if (info_buf == NULL) { | |
1483 | rc = -ENOMEM; | |
1484 | goto out_close; | |
1485 | } | |
1486 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1487 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1488 | current->tgid); |
1489 | /* although we would like to mark the file hidden | |
1490 | if that fails we will still try to rename it */ | |
72d282dc | 1491 | if (!rc) |
3270958b SF |
1492 | cifsInode->cifsAttrs = dosattr; |
1493 | else | |
1494 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1495 | } |
a12a1ac7 | 1496 | |
dd1db2de | 1497 | /* rename the file */ |
d81b8a40 PS |
1498 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1499 | cifs_sb->local_nls, | |
2baa2682 | 1500 | cifs_remap(cifs_sb)); |
3270958b | 1501 | if (rc != 0) { |
47c78f4a | 1502 | rc = -EBUSY; |
3270958b SF |
1503 | goto undo_setattr; |
1504 | } | |
6d22f098 | 1505 | |
3270958b | 1506 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1507 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1508 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1509 | current->tgid); |
1510 | /* | |
1511 | * some samba versions return -ENOENT when we try to set the | |
1512 | * file disposition here. Likely a samba bug, but work around | |
1513 | * it for now. This means that some cifsXXX files may hang | |
1514 | * around after they shouldn't. | |
1515 | * | |
1516 | * BB: remove this hack after more servers have the fix | |
1517 | */ | |
1518 | if (rc == -ENOENT) | |
1519 | rc = 0; | |
1520 | else if (rc != 0) { | |
47c78f4a | 1521 | rc = -EBUSY; |
3270958b SF |
1522 | goto undo_rename; |
1523 | } | |
aff8d5ca | 1524 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1525 | } |
7ce86d5a | 1526 | |
a12a1ac7 | 1527 | out_close: |
d81b8a40 | 1528 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1529 | out: |
3270958b | 1530 | kfree(info_buf); |
7ffec372 | 1531 | cifs_put_tlink(tlink); |
a12a1ac7 | 1532 | return rc; |
3270958b SF |
1533 | |
1534 | /* | |
1535 | * reset everything back to the original state. Don't bother | |
1536 | * dealing with errors here since we can't do anything about | |
1537 | * them anyway. | |
1538 | */ | |
1539 | undo_rename: | |
d81b8a40 | 1540 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1541 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1542 | undo_setattr: |
1543 | if (dosattr != origattr) { | |
1544 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1545 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1546 | current->tgid)) |
1547 | cifsInode->cifsAttrs = origattr; | |
1548 | } | |
1549 | ||
1550 | goto out_close; | |
a12a1ac7 JL |
1551 | } |
1552 | ||
b7ca6928 SF |
1553 | /* copied from fs/nfs/dir.c with small changes */ |
1554 | static void | |
1555 | cifs_drop_nlink(struct inode *inode) | |
1556 | { | |
1557 | spin_lock(&inode->i_lock); | |
1558 | if (inode->i_nlink > 0) | |
1559 | drop_nlink(inode); | |
1560 | spin_unlock(&inode->i_lock); | |
1561 | } | |
ff694527 SF |
1562 | |
1563 | /* | |
2b0143b5 | 1564 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1565 | * is a negative dentry) then we would attempt a standard SMB delete, but |
413d6100 CIK |
1566 | * if that fails we can not attempt the fall back mechanisms on EACCES |
1567 | * but will return the EACCES to the caller. Note that the VFS does not call | |
ff694527 SF |
1568 | * unlink on negative dentries currently. |
1569 | */ | |
5f0319a7 | 1570 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1571 | { |
1572 | int rc = 0; | |
6d5786a3 | 1573 | unsigned int xid; |
1da177e4 | 1574 | char *full_path = NULL; |
2b0143b5 | 1575 | struct inode *inode = d_inode(dentry); |
ff694527 | 1576 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1577 | struct super_block *sb = dir->i_sb; |
1578 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1579 | struct tcon_link *tlink; |
96daf2b0 | 1580 | struct cifs_tcon *tcon; |
ed6875e0 | 1581 | struct TCP_Server_Info *server; |
6050247d SF |
1582 | struct iattr *attrs = NULL; |
1583 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1584 | |
f96637be | 1585 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1586 | |
7ffec372 JL |
1587 | tlink = cifs_sb_tlink(cifs_sb); |
1588 | if (IS_ERR(tlink)) | |
1589 | return PTR_ERR(tlink); | |
1590 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1591 | server = tcon->ses->server; |
7ffec372 | 1592 | |
6d5786a3 | 1593 | xid = get_xid(); |
1da177e4 | 1594 | |
82e9367c SF |
1595 | if (tcon->nodelete) { |
1596 | rc = -EACCES; | |
1597 | goto unlink_out; | |
1598 | } | |
1599 | ||
5f0319a7 JL |
1600 | /* Unlink can be called from rename so we can not take the |
1601 | * sb->s_vfs_rename_mutex here */ | |
1602 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1603 | if (full_path == NULL) { |
0f3bc09e | 1604 | rc = -ENOMEM; |
7ffec372 | 1605 | goto unlink_out; |
1da177e4 | 1606 | } |
2d785a50 | 1607 | |
29e20f9c PS |
1608 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1609 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1610 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1611 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1612 | cifs_remap(cifs_sb)); |
f96637be | 1613 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1614 | if ((rc == 0) || (rc == -ENOENT)) |
1615 | goto psx_del_no_retry; | |
1616 | } | |
1da177e4 | 1617 | |
6050247d | 1618 | retry_std_delete: |
ed6875e0 PS |
1619 | if (!server->ops->unlink) { |
1620 | rc = -ENOSYS; | |
1621 | goto psx_del_no_retry; | |
1622 | } | |
1623 | ||
1624 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1625 | |
2d785a50 | 1626 | psx_del_no_retry: |
1da177e4 | 1627 | if (!rc) { |
5f0319a7 | 1628 | if (inode) |
b7ca6928 | 1629 | cifs_drop_nlink(inode); |
1da177e4 | 1630 | } else if (rc == -ENOENT) { |
5f0319a7 | 1631 | d_drop(dentry); |
47c78f4a | 1632 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1633 | if (server->ops->rename_pending_delete) { |
1634 | rc = server->ops->rename_pending_delete(full_path, | |
1635 | dentry, xid); | |
1636 | if (rc == 0) | |
1637 | cifs_drop_nlink(inode); | |
1638 | } | |
ff694527 | 1639 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1640 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1641 | if (attrs == NULL) { | |
1642 | rc = -ENOMEM; | |
1643 | goto out_reval; | |
1da177e4 | 1644 | } |
388e57b2 SF |
1645 | |
1646 | /* try to reset dos attributes */ | |
ff694527 SF |
1647 | cifs_inode = CIFS_I(inode); |
1648 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1649 | if (origattr == 0) |
1650 | origattr |= ATTR_NORMAL; | |
1651 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1652 | if (dosattr == 0) |
1653 | dosattr |= ATTR_NORMAL; | |
1654 | dosattr |= ATTR_HIDDEN; | |
1655 | ||
1656 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1657 | if (rc != 0) |
1658 | goto out_reval; | |
6050247d SF |
1659 | |
1660 | goto retry_std_delete; | |
1da177e4 | 1661 | } |
6050247d SF |
1662 | |
1663 | /* undo the setattr if we errored out and it's needed */ | |
1664 | if (rc != 0 && dosattr != 0) | |
1665 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1666 | ||
388e57b2 | 1667 | out_reval: |
4523cc30 | 1668 | if (inode) { |
ff694527 SF |
1669 | cifs_inode = CIFS_I(inode); |
1670 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1671 | when needed */ |
e37fea58 | 1672 | inode->i_ctime = current_time(inode); |
06bcfedd | 1673 | } |
e37fea58 | 1674 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1675 | cifs_inode = CIFS_I(dir); |
6050247d | 1676 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1677 | unlink_out: |
1da177e4 | 1678 | kfree(full_path); |
6050247d | 1679 | kfree(attrs); |
6d5786a3 | 1680 | free_xid(xid); |
7ffec372 | 1681 | cifs_put_tlink(tlink); |
1da177e4 LT |
1682 | return rc; |
1683 | } | |
1684 | ||
ff691e96 | 1685 | static int |
101b92d9 | 1686 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1687 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1688 | struct cifs_tcon *tcon, const unsigned int xid) | |
1689 | { | |
1690 | int rc = 0; | |
101b92d9 | 1691 | struct inode *inode = NULL; |
ff691e96 | 1692 | |
d313852d SF |
1693 | if (tcon->posix_extensions) |
1694 | rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid); | |
1695 | else if (tcon->unix_ext) | |
101b92d9 | 1696 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1697 | xid); |
1698 | else | |
101b92d9 JL |
1699 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1700 | xid, NULL); | |
1701 | ||
ff691e96 PS |
1702 | if (rc) |
1703 | return rc; | |
1704 | ||
ff691e96 PS |
1705 | /* |
1706 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1707 | * from the server or was set bogus. Also, since this is a brand new |
1708 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1709 | */ |
101b92d9 JL |
1710 | if (inode->i_nlink < 2) |
1711 | set_nlink(inode, 2); | |
ff691e96 PS |
1712 | mode &= ~current_umask(); |
1713 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1714 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1715 | mode |= S_ISGID; |
1716 | ||
1717 | if (tcon->unix_ext) { | |
1718 | struct cifs_unix_set_info_args args = { | |
1719 | .mode = mode, | |
1720 | .ctime = NO_CHANGE_64, | |
1721 | .atime = NO_CHANGE_64, | |
1722 | .mtime = NO_CHANGE_64, | |
1723 | .device = 0, | |
1724 | }; | |
1725 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1726 | args.uid = current_fsuid(); |
101b92d9 | 1727 | if (parent->i_mode & S_ISGID) |
49418b2c | 1728 | args.gid = parent->i_gid; |
ff691e96 | 1729 | else |
49418b2c | 1730 | args.gid = current_fsgid(); |
ff691e96 | 1731 | } else { |
49418b2c EB |
1732 | args.uid = INVALID_UID; /* no change */ |
1733 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1734 | } |
1735 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1736 | cifs_sb->local_nls, | |
2baa2682 | 1737 | cifs_remap(cifs_sb)); |
ff691e96 | 1738 | } else { |
f436720e | 1739 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1740 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1741 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1742 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1743 | tcon, xid); |
101b92d9 JL |
1744 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1745 | inode->i_mode = (mode | S_IFDIR); | |
1746 | ||
1747 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1748 | inode->i_uid = current_fsuid(); | |
1749 | if (inode->i_mode & S_ISGID) | |
1750 | inode->i_gid = parent->i_gid; | |
1751 | else | |
1752 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1753 | } |
1754 | } | |
101b92d9 | 1755 | d_instantiate(dentry, inode); |
ff691e96 PS |
1756 | return rc; |
1757 | } | |
1758 | ||
1759 | static int | |
1760 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1761 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1762 | struct cifs_tcon *tcon, const unsigned int xid) | |
1763 | { | |
1764 | int rc = 0; | |
1765 | u32 oplock = 0; | |
1766 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1767 | struct inode *newinode = NULL; | |
1768 | struct cifs_fattr fattr; | |
1769 | ||
1770 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1771 | if (info == NULL) { | |
1772 | rc = -ENOMEM; | |
1773 | goto posix_mkdir_out; | |
1774 | } | |
1775 | ||
1776 | mode &= ~current_umask(); | |
1777 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1778 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1779 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1780 | if (rc == -EOPNOTSUPP) |
1781 | goto posix_mkdir_out; | |
1782 | else if (rc) { | |
f96637be | 1783 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1784 | d_drop(dentry); |
1785 | goto posix_mkdir_out; | |
1786 | } | |
1787 | ||
1788 | if (info->Type == cpu_to_le32(-1)) | |
1789 | /* no return info, go query for it */ | |
1790 | goto posix_mkdir_get_info; | |
1791 | /* | |
1792 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1793 | * need to set uid/gid. | |
1794 | */ | |
1795 | ||
1796 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1797 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1798 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1799 | if (!newinode) | |
1800 | goto posix_mkdir_get_info; | |
1801 | ||
1802 | d_instantiate(dentry, newinode); | |
1803 | ||
1804 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1805 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1806 | dentry, dentry, newinode); | |
ff691e96 PS |
1807 | |
1808 | if (newinode->i_nlink != 2) | |
f96637be JP |
1809 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1810 | newinode->i_nlink); | |
ff691e96 PS |
1811 | #endif |
1812 | ||
1813 | posix_mkdir_out: | |
1814 | kfree(info); | |
1815 | return rc; | |
1816 | posix_mkdir_get_info: | |
1817 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1818 | xid); | |
1819 | goto posix_mkdir_out; | |
1820 | } | |
1821 | ||
18bb1db3 | 1822 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) |
1da177e4 | 1823 | { |
ff691e96 | 1824 | int rc = 0; |
6d5786a3 | 1825 | unsigned int xid; |
1da177e4 | 1826 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1827 | struct tcon_link *tlink; |
29e20f9c | 1828 | struct cifs_tcon *tcon; |
f436720e | 1829 | struct TCP_Server_Info *server; |
ff691e96 | 1830 | char *full_path; |
1da177e4 | 1831 | |
f52aa79d | 1832 | cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
f96637be | 1833 | mode, inode); |
1da177e4 | 1834 | |
1da177e4 | 1835 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
1836 | tlink = cifs_sb_tlink(cifs_sb); |
1837 | if (IS_ERR(tlink)) | |
1838 | return PTR_ERR(tlink); | |
29e20f9c | 1839 | tcon = tlink_tcon(tlink); |
7ffec372 | 1840 | |
6d5786a3 | 1841 | xid = get_xid(); |
1da177e4 | 1842 | |
7f57356b | 1843 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1844 | if (full_path == NULL) { |
0f3bc09e | 1845 | rc = -ENOMEM; |
7ffec372 | 1846 | goto mkdir_out; |
1da177e4 | 1847 | } |
50c2f753 | 1848 | |
bea851b8 SF |
1849 | server = tcon->ses->server; |
1850 | ||
bea851b8 SF |
1851 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
1852 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, | |
1853 | cifs_sb); | |
1854 | d_drop(direntry); /* for time being always refresh inode info */ | |
1855 | goto mkdir_out; | |
1856 | } | |
bea851b8 | 1857 | |
29e20f9c PS |
1858 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1859 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1860 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1861 | tcon, xid); | |
1862 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1863 | goto mkdir_out; |
fb8c4b14 | 1864 | } |
ff691e96 | 1865 | |
f436720e PS |
1866 | if (!server->ops->mkdir) { |
1867 | rc = -ENOSYS; | |
1868 | goto mkdir_out; | |
1869 | } | |
1870 | ||
1da177e4 | 1871 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
c3ca78e2 | 1872 | rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
1da177e4 | 1873 | if (rc) { |
f96637be | 1874 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1875 | d_drop(direntry); |
ff691e96 | 1876 | goto mkdir_out; |
1da177e4 | 1877 | } |
ff691e96 | 1878 | |
c3ca78e2 | 1879 | /* TODO: skip this for smb2/smb3 */ |
ff691e96 PS |
1880 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
1881 | xid); | |
fb8c4b14 | 1882 | mkdir_out: |
6de2ce42 PS |
1883 | /* |
1884 | * Force revalidate to get parent dir info when needed since cached | |
1885 | * attributes are invalid now. | |
1886 | */ | |
1887 | CIFS_I(inode)->time = 0; | |
1da177e4 | 1888 | kfree(full_path); |
6d5786a3 | 1889 | free_xid(xid); |
7ffec372 | 1890 | cifs_put_tlink(tlink); |
1da177e4 LT |
1891 | return rc; |
1892 | } | |
1893 | ||
1894 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1895 | { | |
1896 | int rc = 0; | |
6d5786a3 | 1897 | unsigned int xid; |
1da177e4 | 1898 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1899 | struct tcon_link *tlink; |
f958ca5d PS |
1900 | struct cifs_tcon *tcon; |
1901 | struct TCP_Server_Info *server; | |
1da177e4 LT |
1902 | char *full_path = NULL; |
1903 | struct cifsInodeInfo *cifsInode; | |
1904 | ||
f96637be | 1905 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1906 | |
6d5786a3 | 1907 | xid = get_xid(); |
1da177e4 | 1908 | |
7f57356b | 1909 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1910 | if (full_path == NULL) { |
0f3bc09e | 1911 | rc = -ENOMEM; |
7ffec372 | 1912 | goto rmdir_exit; |
1da177e4 LT |
1913 | } |
1914 | ||
7ffec372 JL |
1915 | cifs_sb = CIFS_SB(inode->i_sb); |
1916 | tlink = cifs_sb_tlink(cifs_sb); | |
1917 | if (IS_ERR(tlink)) { | |
1918 | rc = PTR_ERR(tlink); | |
1919 | goto rmdir_exit; | |
1920 | } | |
f958ca5d PS |
1921 | tcon = tlink_tcon(tlink); |
1922 | server = tcon->ses->server; | |
1923 | ||
1924 | if (!server->ops->rmdir) { | |
1925 | rc = -ENOSYS; | |
1926 | cifs_put_tlink(tlink); | |
1927 | goto rmdir_exit; | |
1928 | } | |
7ffec372 | 1929 | |
82e9367c SF |
1930 | if (tcon->nodelete) { |
1931 | rc = -EACCES; | |
1932 | cifs_put_tlink(tlink); | |
1933 | goto rmdir_exit; | |
1934 | } | |
1935 | ||
f958ca5d | 1936 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1937 | cifs_put_tlink(tlink); |
1da177e4 LT |
1938 | |
1939 | if (!rc) { | |
2b0143b5 DH |
1940 | spin_lock(&d_inode(direntry)->i_lock); |
1941 | i_size_write(d_inode(direntry), 0); | |
1942 | clear_nlink(d_inode(direntry)); | |
1943 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1944 | } |
1945 | ||
2b0143b5 | 1946 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1947 | /* force revalidate to go get info when needed */ |
1948 | cifsInode->time = 0; | |
42c24544 SF |
1949 | |
1950 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1951 | /* |
1952 | * Force revalidate to get parent dir info when needed since cached | |
1953 | * attributes are invalid now. | |
1954 | */ | |
1955 | cifsInode->time = 0; | |
42c24544 | 1956 | |
2b0143b5 | 1957 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 1958 | current_time(inode); |
1da177e4 | 1959 | |
7ffec372 | 1960 | rmdir_exit: |
1da177e4 | 1961 | kfree(full_path); |
6d5786a3 | 1962 | free_xid(xid); |
1da177e4 LT |
1963 | return rc; |
1964 | } | |
1965 | ||
ee2fd967 | 1966 | static int |
8ceb9843 PS |
1967 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
1968 | const char *from_path, struct dentry *to_dentry, | |
1969 | const char *to_path) | |
ee2fd967 SF |
1970 | { |
1971 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 1972 | struct tcon_link *tlink; |
8ceb9843 PS |
1973 | struct cifs_tcon *tcon; |
1974 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
1975 | struct cifs_fid fid; |
1976 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
1977 | int oplock, rc; |
1978 | ||
7ffec372 JL |
1979 | tlink = cifs_sb_tlink(cifs_sb); |
1980 | if (IS_ERR(tlink)) | |
1981 | return PTR_ERR(tlink); | |
8ceb9843 PS |
1982 | tcon = tlink_tcon(tlink); |
1983 | server = tcon->ses->server; | |
1984 | ||
1985 | if (!server->ops->rename) | |
1986 | return -ENOSYS; | |
7ffec372 | 1987 | |
ee2fd967 | 1988 | /* try path-based rename first */ |
8ceb9843 | 1989 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
1990 | |
1991 | /* | |
8ceb9843 PS |
1992 | * Don't bother with rename by filehandle unless file is busy and |
1993 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
1994 | * rename by filehandle to various Windows servers. |
1995 | */ | |
47c78f4a | 1996 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 1997 | goto do_rename_exit; |
ee2fd967 | 1998 | |
652727bb FS |
1999 | /* Don't fall back to using SMB on SMB 2+ mount */ |
2000 | if (server->vals->protocol_id != 0) | |
2001 | goto do_rename_exit; | |
2002 | ||
ed0e3ace JL |
2003 | /* open-file renames don't work across directories */ |
2004 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 2005 | goto do_rename_exit; |
ed0e3ace | 2006 | |
d81b8a40 PS |
2007 | oparms.tcon = tcon; |
2008 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 2009 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 | 2010 | oparms.desired_access = DELETE; |
0f060936 | 2011 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
2012 | oparms.disposition = FILE_OPEN; |
2013 | oparms.path = from_path; | |
2014 | oparms.fid = &fid; | |
2015 | oparms.reconnect = false; | |
2016 | ||
2017 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 2018 | if (rc == 0) { |
d81b8a40 | 2019 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 2020 | (const char *) to_dentry->d_name.name, |
2baa2682 | 2021 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 2022 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 2023 | } |
7ffec372 | 2024 | do_rename_exit: |
c7e9f78f SF |
2025 | if (rc == 0) |
2026 | d_move(from_dentry, to_dentry); | |
7ffec372 | 2027 | cifs_put_tlink(tlink); |
ee2fd967 SF |
2028 | return rc; |
2029 | } | |
2030 | ||
8ceb9843 | 2031 | int |
7c33d597 MS |
2032 | cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, |
2033 | struct inode *target_dir, struct dentry *target_dentry, | |
2034 | unsigned int flags) | |
1da177e4 | 2035 | { |
8ceb9843 PS |
2036 | char *from_name = NULL; |
2037 | char *to_name = NULL; | |
639e7a91 | 2038 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 2039 | struct tcon_link *tlink; |
96daf2b0 | 2040 | struct cifs_tcon *tcon; |
ee2fd967 SF |
2041 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
2042 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
2043 | unsigned int xid; |
2044 | int rc, tmprc; | |
1da177e4 | 2045 | |
7c33d597 MS |
2046 | if (flags & ~RENAME_NOREPLACE) |
2047 | return -EINVAL; | |
2048 | ||
639e7a91 | 2049 | cifs_sb = CIFS_SB(source_dir->i_sb); |
7ffec372 JL |
2050 | tlink = cifs_sb_tlink(cifs_sb); |
2051 | if (IS_ERR(tlink)) | |
2052 | return PTR_ERR(tlink); | |
2053 | tcon = tlink_tcon(tlink); | |
1da177e4 | 2054 | |
6d5786a3 | 2055 | xid = get_xid(); |
ee2fd967 | 2056 | |
ee2fd967 SF |
2057 | /* |
2058 | * we already have the rename sem so we do not need to | |
2059 | * grab it again here to protect the path integrity | |
2060 | */ | |
8ceb9843 PS |
2061 | from_name = build_path_from_dentry(source_dentry); |
2062 | if (from_name == NULL) { | |
ee2fd967 SF |
2063 | rc = -ENOMEM; |
2064 | goto cifs_rename_exit; | |
2065 | } | |
2066 | ||
8ceb9843 PS |
2067 | to_name = build_path_from_dentry(target_dentry); |
2068 | if (to_name == NULL) { | |
1da177e4 LT |
2069 | rc = -ENOMEM; |
2070 | goto cifs_rename_exit; | |
2071 | } | |
2072 | ||
8ceb9843 PS |
2073 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
2074 | to_name); | |
ee2fd967 | 2075 | |
7c33d597 MS |
2076 | /* |
2077 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
2078 | */ | |
2079 | if (flags & RENAME_NOREPLACE) | |
2080 | goto cifs_rename_exit; | |
2081 | ||
14121bdc JL |
2082 | if (rc == -EEXIST && tcon->unix_ext) { |
2083 | /* | |
8ceb9843 PS |
2084 | * Are src and dst hardlinks of same inode? We can only tell |
2085 | * with unix extensions enabled. | |
14121bdc JL |
2086 | */ |
2087 | info_buf_source = | |
6da2ec56 | 2088 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
14121bdc JL |
2089 | GFP_KERNEL); |
2090 | if (info_buf_source == NULL) { | |
2091 | rc = -ENOMEM; | |
2092 | goto cifs_rename_exit; | |
2093 | } | |
2094 | ||
2095 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
2096 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
2097 | info_buf_source, | |
2098 | cifs_sb->local_nls, | |
2baa2682 | 2099 | cifs_remap(cifs_sb)); |
8d281efb | 2100 | if (tmprc != 0) |
14121bdc | 2101 | goto unlink_target; |
ee2fd967 | 2102 | |
8ceb9843 PS |
2103 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
2104 | info_buf_target, | |
2105 | cifs_sb->local_nls, | |
2baa2682 | 2106 | cifs_remap(cifs_sb)); |
14121bdc | 2107 | |
8d281efb | 2108 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 2109 | info_buf_target->UniqueId)) { |
14121bdc | 2110 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 2111 | rc = 0; |
14121bdc | 2112 | goto cifs_rename_exit; |
ae6884a9 | 2113 | } |
8ceb9843 PS |
2114 | } |
2115 | /* | |
2116 | * else ... BB we could add the same check for Windows by | |
2117 | * checking the UniqueId via FILE_INTERNAL_INFO | |
2118 | */ | |
14121bdc | 2119 | |
ee2fd967 | 2120 | unlink_target: |
0e670518 SF |
2121 | /* Try unlinking the target dentry if it's not negative */ |
2122 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { | |
a07d3220 PS |
2123 | if (d_is_dir(target_dentry)) |
2124 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
2125 | else | |
2126 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
2127 | if (tmprc) |
2128 | goto cifs_rename_exit; | |
8ceb9843 PS |
2129 | rc = cifs_do_rename(xid, source_dentry, from_name, |
2130 | target_dentry, to_name); | |
1da177e4 LT |
2131 | } |
2132 | ||
b46799a8 PS |
2133 | /* force revalidate to go get info when needed */ |
2134 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
2135 | ||
2136 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 2137 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 2138 | |
1da177e4 | 2139 | cifs_rename_exit: |
ee2fd967 | 2140 | kfree(info_buf_source); |
8ceb9843 PS |
2141 | kfree(from_name); |
2142 | kfree(to_name); | |
6d5786a3 | 2143 | free_xid(xid); |
7ffec372 | 2144 | cifs_put_tlink(tlink); |
1da177e4 LT |
2145 | return rc; |
2146 | } | |
2147 | ||
df2cf170 JL |
2148 | static bool |
2149 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 2150 | { |
df2cf170 | 2151 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 2152 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1da177e4 | 2153 | |
57c55cd7 RS |
2154 | if (cifs_i->time == 0) |
2155 | return true; | |
2156 | ||
18cceb6a | 2157 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 2158 | return false; |
1da177e4 | 2159 | |
df2cf170 JL |
2160 | if (!lookupCacheEnabled) |
2161 | return true; | |
1da177e4 | 2162 | |
a87c9ad9 JL |
2163 | if (!cifs_sb->actimeo) |
2164 | return true; | |
2165 | ||
6d20e840 SJ |
2166 | if (!time_in_range(jiffies, cifs_i->time, |
2167 | cifs_i->time + cifs_sb->actimeo)) | |
df2cf170 JL |
2168 | return true; |
2169 | ||
db19272e | 2170 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 2171 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
2172 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
2173 | return true; | |
2174 | ||
df2cf170 JL |
2175 | return false; |
2176 | } | |
2177 | ||
523fb8c8 SJ |
2178 | /* |
2179 | * Zap the cache. Called when invalid_mapping flag is set. | |
2180 | */ | |
6feb9891 | 2181 | int |
df2cf170 JL |
2182 | cifs_invalidate_mapping(struct inode *inode) |
2183 | { | |
6feb9891 | 2184 | int rc = 0; |
df2cf170 | 2185 | |
df2cf170 | 2186 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 2187 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 2188 | if (rc) |
a0a3036b | 2189 | cifs_dbg(VFS, "%s: Could not invalidate inode %p\n", |
f96637be | 2190 | __func__, inode); |
df2cf170 | 2191 | } |
257fb1f1 | 2192 | |
9451a9a5 | 2193 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 2194 | return rc; |
df2cf170 JL |
2195 | } |
2196 | ||
4f73c7d3 JL |
2197 | /** |
2198 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
2199 | * @word: long word containing the bit lock | |
2200 | */ | |
2201 | static int | |
dfd01f02 | 2202 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 2203 | { |
4f73c7d3 | 2204 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
2205 | if (signal_pending_state(mode, current)) |
2206 | return -ERESTARTSYS; | |
4f73c7d3 JL |
2207 | return 0; |
2208 | } | |
2209 | ||
e284e53f JL |
2210 | int |
2211 | cifs_revalidate_mapping(struct inode *inode) | |
2212 | { | |
4f73c7d3 JL |
2213 | int rc; |
2214 | unsigned long *flags = &CIFS_I(inode)->flags; | |
2215 | ||
4e8aea30 SF |
2216 | /* swapfiles are not supposed to be shared */ |
2217 | if (IS_SWAPFILE(inode)) | |
2218 | return 0; | |
2219 | ||
74316201 N |
2220 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
2221 | TASK_KILLABLE); | |
4f73c7d3 JL |
2222 | if (rc) |
2223 | return rc; | |
2224 | ||
2225 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
2226 | rc = cifs_invalidate_mapping(inode); | |
2227 | if (rc) | |
2228 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
2229 | } | |
2230 | ||
2231 | clear_bit_unlock(CIFS_INO_LOCK, flags); | |
b1cce803 | 2232 | smp_mb__after_atomic(); |
4f73c7d3 JL |
2233 | wake_up_bit(flags, CIFS_INO_LOCK); |
2234 | ||
2235 | return rc; | |
2236 | } | |
2237 | ||
2238 | int | |
2239 | cifs_zap_mapping(struct inode *inode) | |
2240 | { | |
2241 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
2242 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
2243 | } |
2244 | ||
6feb9891 | 2245 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
2246 | { |
2247 | int rc = 0; | |
496ad9aa | 2248 | struct inode *inode = file_inode(filp); |
ba00ba64 | 2249 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d JL |
2250 | |
2251 | if (!cifs_inode_needs_reval(inode)) | |
6feb9891 | 2252 | return rc; |
abab095d | 2253 | |
13cfb733 | 2254 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
2255 | rc = cifs_get_file_info_unix(filp); |
2256 | else | |
2257 | rc = cifs_get_file_info(filp); | |
2258 | ||
abab095d JL |
2259 | return rc; |
2260 | } | |
2261 | ||
6feb9891 | 2262 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 2263 | { |
6d5786a3 | 2264 | unsigned int xid; |
df2cf170 | 2265 | int rc = 0; |
2b0143b5 | 2266 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2267 | struct super_block *sb = dentry->d_sb; |
6feb9891 | 2268 | char *full_path = NULL; |
fc513fac | 2269 | int count = 0; |
df2cf170 JL |
2270 | |
2271 | if (inode == NULL) | |
2272 | return -ENOENT; | |
1da177e4 | 2273 | |
df2cf170 | 2274 | if (!cifs_inode_needs_reval(inode)) |
6feb9891 PS |
2275 | return rc; |
2276 | ||
6d5786a3 | 2277 | xid = get_xid(); |
1da177e4 LT |
2278 | |
2279 | /* can not safely grab the rename sem here if rename calls revalidate | |
2280 | since that would deadlock */ | |
df2cf170 | 2281 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 2282 | if (full_path == NULL) { |
0f3bc09e | 2283 | rc = -ENOMEM; |
6feb9891 | 2284 | goto out; |
1da177e4 LT |
2285 | } |
2286 | ||
f96637be JP |
2287 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2288 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2289 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2290 | |
fc513fac | 2291 | again: |
6a5f6592 SF |
2292 | if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions) |
2293 | rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid); | |
2294 | else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) | |
df2cf170 JL |
2295 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2296 | else | |
2297 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2298 | xid, NULL); | |
fc513fac RS |
2299 | if (rc == -EAGAIN && count++ < 10) |
2300 | goto again; | |
6feb9891 | 2301 | out: |
1da177e4 | 2302 | kfree(full_path); |
6d5786a3 | 2303 | free_xid(xid); |
fc513fac | 2304 | |
1da177e4 LT |
2305 | return rc; |
2306 | } | |
2307 | ||
6feb9891 PS |
2308 | int cifs_revalidate_file(struct file *filp) |
2309 | { | |
2310 | int rc; | |
496ad9aa | 2311 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2312 | |
2313 | rc = cifs_revalidate_file_attr(filp); | |
2314 | if (rc) | |
2315 | return rc; | |
2316 | ||
e284e53f | 2317 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2318 | } |
2319 | ||
2320 | /* revalidate a dentry's inode attributes */ | |
2321 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2322 | { | |
2323 | int rc; | |
2b0143b5 | 2324 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2325 | |
2326 | rc = cifs_revalidate_dentry_attr(dentry); | |
2327 | if (rc) | |
2328 | return rc; | |
2329 | ||
e284e53f | 2330 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2331 | } |
2332 | ||
a528d35e DH |
2333 | int cifs_getattr(const struct path *path, struct kstat *stat, |
2334 | u32 request_mask, unsigned int flags) | |
1da177e4 | 2335 | { |
a528d35e | 2336 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2337 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2338 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2339 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2340 | int rc; |
3aa1c8c2 | 2341 | |
6feb9891 PS |
2342 | /* |
2343 | * We need to be sure that all dirty pages are written and the server | |
2344 | * has actual ctime, mtime and file length. | |
2345 | */ | |
ffdec8d6 SF |
2346 | if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE)) && |
2347 | !CIFS_CACHE_READ(CIFS_I(inode)) && | |
2348 | inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
6feb9891 | 2349 | rc = filemap_fdatawait(inode->i_mapping); |
156ecb2d SF |
2350 | if (rc) { |
2351 | mapping_set_error(inode->i_mapping, rc); | |
2352 | return rc; | |
2353 | } | |
6feb9891 | 2354 | } |
1c456013 | 2355 | |
ffdec8d6 SF |
2356 | if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) |
2357 | CIFS_I(inode)->time = 0; /* force revalidate */ | |
2358 | ||
2359 | /* | |
2360 | * If the caller doesn't require syncing, only sync if | |
2361 | * necessary (e.g. due to earlier truncate or setattr | |
2362 | * invalidating the cached metadata) | |
2363 | */ | |
2364 | if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || | |
2365 | (CIFS_I(inode)->time == 0)) { | |
2366 | rc = cifs_revalidate_dentry_attr(dentry); | |
2367 | if (rc) | |
2368 | return rc; | |
2369 | } | |
6feb9891 PS |
2370 | |
2371 | generic_fillattr(inode, stat); | |
e8506d25 | 2372 | stat->blksize = cifs_sb->bsize; |
6feb9891 PS |
2373 | stat->ino = CIFS_I(inode)->uniqueid; |
2374 | ||
6e70e26d SF |
2375 | /* old CIFS Unix Extensions doesn't return create time */ |
2376 | if (CIFS_I(inode)->createtime) { | |
2377 | stat->result_mask |= STATX_BTIME; | |
95390201 AB |
2378 | stat->btime = |
2379 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
6e70e26d SF |
2380 | } |
2381 | ||
2382 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2383 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2384 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2385 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2386 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2387 | ||
6feb9891 | 2388 | /* |
d3d1fce1 JL |
2389 | * If on a multiuser mount without unix extensions or cifsacl being |
2390 | * enabled, and the admin hasn't overridden them, set the ownership | |
2391 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2392 | */ |
2393 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2394 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2395 | !tcon->unix_ext) { |
2396 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2397 | stat->uid = current_fsuid(); | |
2398 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2399 | stat->gid = current_fsgid(); | |
5fe14c85 | 2400 | } |
39946886 | 2401 | return 0; |
1da177e4 LT |
2402 | } |
2403 | ||
2f3ebaba RS |
2404 | int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
2405 | u64 len) | |
2406 | { | |
2407 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
2408 | struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); | |
2409 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
2410 | struct TCP_Server_Info *server = tcon->ses->server; | |
2411 | struct cifsFileInfo *cfile; | |
2412 | int rc; | |
2413 | ||
2414 | /* | |
2415 | * We need to be sure that all dirty pages are written as they | |
2416 | * might fill holes on the server. | |
2417 | */ | |
2418 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && | |
2419 | inode->i_mapping->nrpages != 0) { | |
2420 | rc = filemap_fdatawait(inode->i_mapping); | |
2421 | if (rc) { | |
2422 | mapping_set_error(inode->i_mapping, rc); | |
2423 | return rc; | |
2424 | } | |
2425 | } | |
2426 | ||
2427 | cfile = find_readable_file(cifs_i, false); | |
2428 | if (cfile == NULL) | |
2429 | return -EINVAL; | |
2430 | ||
2431 | if (server->ops->fiemap) { | |
2432 | rc = server->ops->fiemap(tcon, cfile, fei, start, len); | |
2433 | cifsFileInfo_put(cfile); | |
2434 | return rc; | |
2435 | } | |
2436 | ||
2437 | cifsFileInfo_put(cfile); | |
2438 | return -ENOTSUPP; | |
2439 | } | |
2440 | ||
8bd0d701 | 2441 | int cifs_truncate_page(struct address_space *mapping, loff_t from) |
1da177e4 | 2442 | { |
09cbfeaf KS |
2443 | pgoff_t index = from >> PAGE_SHIFT; |
2444 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2445 | struct page *page; |
1da177e4 LT |
2446 | int rc = 0; |
2447 | ||
2448 | page = grab_cache_page(mapping, index); | |
2449 | if (!page) | |
2450 | return -ENOMEM; | |
2451 | ||
09cbfeaf | 2452 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2453 | unlock_page(page); |
09cbfeaf | 2454 | put_page(page); |
1da177e4 LT |
2455 | return rc; |
2456 | } | |
2457 | ||
8bd0d701 | 2458 | void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2459 | { |
57c55cd7 RS |
2460 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
2461 | ||
ba6a46a0 | 2462 | spin_lock(&inode->i_lock); |
3677db10 | 2463 | i_size_write(inode, offset); |
ba6a46a0 | 2464 | spin_unlock(&inode->i_lock); |
1b947463 | 2465 | |
57c55cd7 RS |
2466 | /* Cached inode must be refreshed on truncate */ |
2467 | cifs_i->time = 0; | |
7caef267 | 2468 | truncate_pagecache(inode, offset); |
3677db10 SF |
2469 | } |
2470 | ||
8efdbde6 JL |
2471 | static int |
2472 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
6d5786a3 | 2473 | unsigned int xid, char *full_path) |
8efdbde6 JL |
2474 | { |
2475 | int rc; | |
2476 | struct cifsFileInfo *open_file; | |
2477 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2478 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2479 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2480 | struct cifs_tcon *tcon = NULL; |
2481 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2482 | |
2483 | /* | |
2484 | * To avoid spurious oplock breaks from server, in the case of | |
2485 | * inodes that we already have open, avoid doing path based | |
2486 | * setting of file size if we can do it by handle. | |
2487 | * This keeps our caching token (oplock) and avoids timeouts | |
2488 | * when the local oplock break takes longer to flush | |
2489 | * writebehind data than the SMB timeout for the SetPathInfo | |
2490 | * request would allow | |
2491 | */ | |
86f740f2 | 2492 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
8efdbde6 | 2493 | if (open_file) { |
d1433418 PS |
2494 | tcon = tlink_tcon(open_file->tlink); |
2495 | server = tcon->ses->server; | |
2496 | if (server->ops->set_file_size) | |
2497 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2498 | attrs->ia_size, false); | |
2499 | else | |
2500 | rc = -ENOSYS; | |
6ab409b5 | 2501 | cifsFileInfo_put(open_file); |
f96637be | 2502 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2503 | } else |
2504 | rc = -EINVAL; | |
2505 | ||
d1433418 PS |
2506 | if (!rc) |
2507 | goto set_size_out; | |
2508 | ||
2509 | if (tcon == NULL) { | |
2510 | tlink = cifs_sb_tlink(cifs_sb); | |
2511 | if (IS_ERR(tlink)) | |
2512 | return PTR_ERR(tlink); | |
2513 | tcon = tlink_tcon(tlink); | |
2514 | server = tcon->ses->server; | |
2515 | } | |
ba00ba64 | 2516 | |
d1433418 PS |
2517 | /* |
2518 | * Set file size by pathname rather than by handle either because no | |
2519 | * valid, writeable file handle for it was found or because there was | |
2520 | * an error setting it by handle. | |
2521 | */ | |
2522 | if (server->ops->set_path_size) | |
2523 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2524 | attrs->ia_size, cifs_sb, false); | |
2525 | else | |
2526 | rc = -ENOSYS; | |
f96637be | 2527 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2528 | |
d1433418 PS |
2529 | if (tlink) |
2530 | cifs_put_tlink(tlink); | |
8efdbde6 | 2531 | |
d1433418 | 2532 | set_size_out: |
8efdbde6 | 2533 | if (rc == 0) { |
fbec9ab9 | 2534 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2535 | cifs_setsize(inode, attrs->ia_size); |
5618303d ZX |
2536 | |
2537 | /* | |
2538 | * The man page of truncate says if the size changed, | |
2539 | * then the st_ctime and st_mtime fields for the file | |
2540 | * are updated. | |
2541 | */ | |
2542 | attrs->ia_ctime = attrs->ia_mtime = current_time(inode); | |
2543 | attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; | |
2544 | ||
8efdbde6 JL |
2545 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2546 | } | |
2547 | ||
2548 | return rc; | |
2549 | } | |
2550 | ||
3fe5c1dd JL |
2551 | static int |
2552 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2553 | { | |
2554 | int rc; | |
6d5786a3 | 2555 | unsigned int xid; |
3fe5c1dd | 2556 | char *full_path = NULL; |
2b0143b5 | 2557 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2558 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2559 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2560 | struct tcon_link *tlink; |
96daf2b0 | 2561 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2562 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2563 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2564 | |
35c265e0 AV |
2565 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2566 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2567 | |
6d5786a3 | 2568 | xid = get_xid(); |
3fe5c1dd | 2569 | |
db78b877 CH |
2570 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2571 | attrs->ia_valid |= ATTR_FORCE; | |
2572 | ||
31051c85 | 2573 | rc = setattr_prepare(direntry, attrs); |
db78b877 CH |
2574 | if (rc < 0) |
2575 | goto out; | |
3fe5c1dd JL |
2576 | |
2577 | full_path = build_path_from_dentry(direntry); | |
2578 | if (full_path == NULL) { | |
2579 | rc = -ENOMEM; | |
2580 | goto out; | |
2581 | } | |
2582 | ||
0f4d634c JL |
2583 | /* |
2584 | * Attempt to flush data before changing attributes. We need to do | |
2585 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2586 | * ownership or mode then we may also need to do this. Here, we take | |
2587 | * the safe way out and just do the flush on all setattr requests. If | |
2588 | * the flush returns error, store it to report later and continue. | |
2589 | * | |
2590 | * BB: This should be smarter. Why bother flushing pages that | |
2591 | * will be truncated anyway? Also, should we error out here if | |
2592 | * the flush returns error? | |
2593 | */ | |
2594 | rc = filemap_write_and_wait(inode->i_mapping); | |
9a66396f PS |
2595 | if (is_interrupt_error(rc)) { |
2596 | rc = -ERESTARTSYS; | |
2597 | goto out; | |
2598 | } | |
2599 | ||
eb4b756b JL |
2600 | mapping_set_error(inode->i_mapping, rc); |
2601 | rc = 0; | |
3fe5c1dd JL |
2602 | |
2603 | if (attrs->ia_valid & ATTR_SIZE) { | |
2604 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2605 | if (rc != 0) | |
2606 | goto out; | |
2607 | } | |
2608 | ||
2609 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2610 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2611 | attrs->ia_valid &= ~ATTR_MODE; | |
2612 | ||
2613 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2614 | if (args == NULL) { | |
2615 | rc = -ENOMEM; | |
2616 | goto out; | |
2617 | } | |
2618 | ||
2619 | /* set up the struct */ | |
2620 | if (attrs->ia_valid & ATTR_MODE) | |
2621 | args->mode = attrs->ia_mode; | |
2622 | else | |
2623 | args->mode = NO_CHANGE_64; | |
2624 | ||
2625 | if (attrs->ia_valid & ATTR_UID) | |
2626 | args->uid = attrs->ia_uid; | |
2627 | else | |
49418b2c | 2628 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2629 | |
2630 | if (attrs->ia_valid & ATTR_GID) | |
2631 | args->gid = attrs->ia_gid; | |
2632 | else | |
49418b2c | 2633 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2634 | |
2635 | if (attrs->ia_valid & ATTR_ATIME) | |
95390201 | 2636 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
3fe5c1dd JL |
2637 | else |
2638 | args->atime = NO_CHANGE_64; | |
2639 | ||
2640 | if (attrs->ia_valid & ATTR_MTIME) | |
95390201 | 2641 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
3fe5c1dd JL |
2642 | else |
2643 | args->mtime = NO_CHANGE_64; | |
2644 | ||
2645 | if (attrs->ia_valid & ATTR_CTIME) | |
95390201 | 2646 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
3fe5c1dd JL |
2647 | else |
2648 | args->ctime = NO_CHANGE_64; | |
2649 | ||
2650 | args->device = 0; | |
86f740f2 | 2651 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
3bbeeb3c | 2652 | if (open_file) { |
4b4de76e | 2653 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2654 | u32 npid = open_file->pid; |
13cfb733 | 2655 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2656 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2657 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2658 | } else { |
7ffec372 JL |
2659 | tlink = cifs_sb_tlink(cifs_sb); |
2660 | if (IS_ERR(tlink)) { | |
2661 | rc = PTR_ERR(tlink); | |
2662 | goto out; | |
2663 | } | |
2664 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2665 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2666 | cifs_sb->local_nls, |
bc8ebdc4 | 2667 | cifs_remap(cifs_sb)); |
7ffec372 | 2668 | cifs_put_tlink(tlink); |
3bbeeb3c | 2669 | } |
3fe5c1dd | 2670 | |
1025774c CH |
2671 | if (rc) |
2672 | goto out; | |
ccd4bb1b | 2673 | |
1025774c | 2674 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2675 | attrs->ia_size != i_size_read(inode)) |
2676 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2677 | |
2678 | setattr_copy(inode, attrs); | |
2679 | mark_inode_dirty(inode); | |
2680 | ||
2681 | /* force revalidate when any of these times are set since some | |
2682 | of the fs types (eg ext3, fat) do not have fine enough | |
2683 | time granularity to match protocol, and we do not have a | |
2684 | a way (yet) to query the server fs's time granularity (and | |
2685 | whether it rounds times down). | |
2686 | */ | |
2687 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2688 | cifsInode->time = 0; | |
3fe5c1dd JL |
2689 | out: |
2690 | kfree(args); | |
2691 | kfree(full_path); | |
6d5786a3 | 2692 | free_xid(xid); |
3fe5c1dd JL |
2693 | return rc; |
2694 | } | |
2695 | ||
0510eeb7 JL |
2696 | static int |
2697 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2698 | { |
6d5786a3 | 2699 | unsigned int xid; |
8abf2775 EB |
2700 | kuid_t uid = INVALID_UID; |
2701 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2702 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2703 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2704 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
aa081859 RS |
2705 | struct cifsFileInfo *wfile; |
2706 | struct cifs_tcon *tcon; | |
1da177e4 LT |
2707 | char *full_path = NULL; |
2708 | int rc = -EACCES; | |
feb3e20c | 2709 | __u32 dosattr = 0; |
4e1e7fb9 | 2710 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2711 | |
6d5786a3 | 2712 | xid = get_xid(); |
1da177e4 | 2713 | |
63d614a6 | 2714 | cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
35c265e0 | 2715 | direntry, attrs->ia_valid); |
6473a559 | 2716 | |
db78b877 CH |
2717 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2718 | attrs->ia_valid |= ATTR_FORCE; | |
2719 | ||
31051c85 | 2720 | rc = setattr_prepare(direntry, attrs); |
db78b877 | 2721 | if (rc < 0) { |
6d5786a3 | 2722 | free_xid(xid); |
db78b877 | 2723 | return rc; |
6473a559 | 2724 | } |
50c2f753 | 2725 | |
7f57356b | 2726 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 2727 | if (full_path == NULL) { |
0f3bc09e | 2728 | rc = -ENOMEM; |
6d5786a3 | 2729 | free_xid(xid); |
0f3bc09e | 2730 | return rc; |
1da177e4 | 2731 | } |
1da177e4 | 2732 | |
0f4d634c JL |
2733 | /* |
2734 | * Attempt to flush data before changing attributes. We need to do | |
cf5371ae SF |
2735 | * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data |
2736 | * returns error, store it to report later and continue. | |
0f4d634c JL |
2737 | * |
2738 | * BB: This should be smarter. Why bother flushing pages that | |
2739 | * will be truncated anyway? Also, should we error out here if | |
cf5371ae | 2740 | * the flush returns error? Do we need to check for ATTR_MTIME_SET flag? |
0f4d634c | 2741 | */ |
cf5371ae SF |
2742 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { |
2743 | rc = filemap_write_and_wait(inode->i_mapping); | |
2744 | if (is_interrupt_error(rc)) { | |
2745 | rc = -ERESTARTSYS; | |
2746 | goto cifs_setattr_exit; | |
2747 | } | |
2748 | mapping_set_error(inode->i_mapping, rc); | |
9a66396f PS |
2749 | } |
2750 | ||
eb4b756b | 2751 | rc = 0; |
cea21805 | 2752 | |
cf5371ae SF |
2753 | if ((attrs->ia_valid & ATTR_MTIME) && |
2754 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { | |
86f740f2 | 2755 | rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); |
aa081859 RS |
2756 | if (!rc) { |
2757 | tcon = tlink_tcon(wfile->tlink); | |
2758 | rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); | |
2759 | cifsFileInfo_put(wfile); | |
2760 | if (rc) | |
783bf7b8 | 2761 | goto cifs_setattr_exit; |
aa081859 | 2762 | } else if (rc != -EBADF) |
783bf7b8 | 2763 | goto cifs_setattr_exit; |
aa081859 RS |
2764 | else |
2765 | rc = 0; | |
2766 | } | |
2767 | ||
50531444 | 2768 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2769 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2770 | if (rc != 0) | |
e30dcf3a | 2771 | goto cifs_setattr_exit; |
1da177e4 | 2772 | } |
4ca691a8 | 2773 | |
a5ff3769 SP |
2774 | if (attrs->ia_valid & ATTR_UID) |
2775 | uid = attrs->ia_uid; | |
2776 | ||
2777 | if (attrs->ia_valid & ATTR_GID) | |
2778 | gid = attrs->ia_gid; | |
2779 | ||
22442179 SF |
2780 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2781 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
8abf2775 | 2782 | if (uid_valid(uid) || gid_valid(gid)) { |
a5ff3769 SP |
2783 | rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, |
2784 | uid, gid); | |
2785 | if (rc) { | |
f96637be JP |
2786 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2787 | __func__, rc); | |
a5ff3769 SP |
2788 | goto cifs_setattr_exit; |
2789 | } | |
2790 | } | |
2791 | } else | |
3fe5c1dd | 2792 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2793 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2794 | |
d32c4f26 JL |
2795 | /* skip mode change if it's just for clearing setuid/setgid */ |
2796 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2797 | attrs->ia_valid &= ~ATTR_MODE; | |
2798 | ||
1da177e4 | 2799 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2800 | mode = attrs->ia_mode; |
cdbce9c8 | 2801 | rc = 0; |
22442179 SF |
2802 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2803 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
a5ff3769 | 2804 | rc = id_mode_to_cifs_acl(inode, full_path, mode, |
8abf2775 | 2805 | INVALID_UID, INVALID_GID); |
78415d2d | 2806 | if (rc) { |
f96637be JP |
2807 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2808 | __func__, rc); | |
78415d2d SP |
2809 | goto cifs_setattr_exit; |
2810 | } | |
2811 | } else | |
5132861a JL |
2812 | if (((mode & S_IWUGO) == 0) && |
2813 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2814 | |
2815 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2816 | ||
5132861a JL |
2817 | /* fix up mode if we're not using dynperm */ |
2818 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2819 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2820 | } else if ((mode & S_IWUGO) && | |
2821 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2822 | |
2823 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2824 | /* Attributes of 0 are ignored */ | |
2825 | if (dosattr == 0) | |
2826 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2827 | |
2828 | /* reset local inode permissions to normal */ | |
2829 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2830 | attrs->ia_mode &= ~(S_IALLUGO); | |
2831 | if (S_ISDIR(inode->i_mode)) | |
2832 | attrs->ia_mode |= | |
2833 | cifs_sb->mnt_dir_mode; | |
2834 | else | |
2835 | attrs->ia_mode |= | |
2836 | cifs_sb->mnt_file_mode; | |
2837 | } | |
2838 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2839 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2840 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2841 | } |
1da177e4 LT |
2842 | } |
2843 | ||
feb3e20c JL |
2844 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2845 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2846 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2847 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2848 | |
e30dcf3a SF |
2849 | /* Even if error on time set, no sense failing the call if |
2850 | the server would set the time to a reasonable value anyway, | |
2851 | and this check ensures that we are not being called from | |
2852 | sys_utimes in which case we ought to fail the call back to | |
2853 | the user when the server rejects the call */ | |
fb8c4b14 | 2854 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2855 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2856 | rc = 0; |
1da177e4 LT |
2857 | } |
2858 | ||
2859 | /* do not need local check to inode_check_ok since the server does | |
2860 | that */ | |
1025774c CH |
2861 | if (rc) |
2862 | goto cifs_setattr_exit; | |
2863 | ||
2864 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2865 | attrs->ia_size != i_size_read(inode)) |
2866 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2867 | |
2868 | setattr_copy(inode, attrs); | |
2869 | mark_inode_dirty(inode); | |
1025774c | 2870 | |
e30dcf3a | 2871 | cifs_setattr_exit: |
1da177e4 | 2872 | kfree(full_path); |
6d5786a3 | 2873 | free_xid(xid); |
1da177e4 LT |
2874 | return rc; |
2875 | } | |
2876 | ||
0510eeb7 JL |
2877 | int |
2878 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2879 | { | |
fc64005c | 2880 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2881 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
0510eeb7 JL |
2882 | |
2883 | if (pTcon->unix_ext) | |
2884 | return cifs_setattr_unix(direntry, attrs); | |
2885 | ||
2886 | return cifs_setattr_nounix(direntry, attrs); | |
2887 | ||
2888 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2889 | } | |
2890 | ||
99ee4dbd | 2891 | #if 0 |
1da177e4 LT |
2892 | void cifs_delete_inode(struct inode *inode) |
2893 | { | |
f96637be | 2894 | cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode); |
1da177e4 LT |
2895 | /* may have to add back in if and when safe distributed caching of |
2896 | directories added e.g. via FindNotify */ | |
2897 | } | |
99ee4dbd | 2898 | #endif |