Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 | 22 | #include <linux/stat.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 | 24 | #include <linux/pagemap.h> |
4f73c7d3 | 25 | #include <linux/freezer.h> |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
5dd43ce2 | 27 | #include <linux/wait_bit.h> |
174cd4b1 | 28 | |
1da177e4 LT |
29 | #include <asm/div64.h> |
30 | #include "cifsfs.h" | |
31 | #include "cifspdu.h" | |
32 | #include "cifsglob.h" | |
33 | #include "cifsproto.h" | |
34 | #include "cifs_debug.h" | |
35 | #include "cifs_fs_sb.h" | |
2baa2682 | 36 | #include "cifs_unicode.h" |
9451a9a5 | 37 | #include "fscache.h" |
1da177e4 | 38 | |
70eff55d | 39 | |
01c64fea | 40 | static void cifs_set_ops(struct inode *inode) |
70eff55d CH |
41 | { |
42 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
43 | ||
44 | switch (inode->i_mode & S_IFMT) { | |
45 | case S_IFREG: | |
46 | inode->i_op = &cifs_file_inode_ops; | |
47 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
48 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
49 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
50 | else | |
51 | inode->i_fop = &cifs_file_direct_ops; | |
8be7e6ba PS |
52 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
53 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
54 | inode->i_fop = &cifs_file_strict_nobrl_ops; | |
55 | else | |
56 | inode->i_fop = &cifs_file_strict_ops; | |
70eff55d CH |
57 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
58 | inode->i_fop = &cifs_file_nobrl_ops; | |
59 | else { /* not direct, send byte range locks */ | |
60 | inode->i_fop = &cifs_file_ops; | |
61 | } | |
62 | ||
70eff55d | 63 | /* check if server can support readpages */ |
0d424ad0 | 64 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf < |
09cbfeaf | 65 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
70eff55d CH |
66 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
67 | else | |
68 | inode->i_data.a_ops = &cifs_addr_ops; | |
69 | break; | |
70 | case S_IFDIR: | |
bc5b6e24 | 71 | #ifdef CONFIG_CIFS_DFS_UPCALL |
01c64fea | 72 | if (IS_AUTOMOUNT(inode)) { |
7962670e IM |
73 | inode->i_op = &cifs_dfs_referral_inode_operations; |
74 | } else { | |
bc5b6e24 SF |
75 | #else /* NO DFS support, treat as a directory */ |
76 | { | |
77 | #endif | |
7962670e IM |
78 | inode->i_op = &cifs_dir_inode_ops; |
79 | inode->i_fop = &cifs_dir_ops; | |
80 | } | |
70eff55d CH |
81 | break; |
82 | case S_IFLNK: | |
83 | inode->i_op = &cifs_symlink_inode_ops; | |
84 | break; | |
85 | default: | |
86 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
87 | break; | |
88 | } | |
89 | } | |
90 | ||
df2cf170 JL |
91 | /* check inode attributes against fattr. If they don't match, tag the |
92 | * inode for cache invalidation | |
93 | */ | |
94 | static void | |
95 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
96 | { | |
97 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
98 | ||
f96637be JP |
99 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
100 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
101 | |
102 | if (inode->i_state & I_NEW) { | |
f96637be JP |
103 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
104 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
105 | return; |
106 | } | |
107 | ||
108 | /* don't bother with revalidation if we have an oplock */ | |
18cceb6a | 109 | if (CIFS_CACHE_READ(cifs_i)) { |
f96637be JP |
110 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
111 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
112 | return; |
113 | } | |
114 | ||
115 | /* revalidate if mtime or size have changed */ | |
95390201 | 116 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
df2cf170 | 117 | cifs_i->server_eof == fattr->cf_eof) { |
f96637be JP |
118 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
119 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
120 | return; |
121 | } | |
122 | ||
f96637be JP |
123 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
124 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 125 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
126 | } |
127 | ||
74d290da JM |
128 | /* |
129 | * copy nlink to the inode, unless it wasn't provided. Provide | |
130 | * sane values if we don't have an existing one and none was provided | |
131 | */ | |
132 | static void | |
133 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
134 | { | |
135 | /* | |
136 | * if we're in a situation where we can't trust what we | |
137 | * got from the server (readdir, some non-unix cases) | |
138 | * fake reasonable values | |
139 | */ | |
140 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
141 | /* only provide fake values on a new inode */ | |
142 | if (inode->i_state & I_NEW) { | |
143 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
144 | set_nlink(inode, 2); | |
145 | else | |
146 | set_nlink(inode, 1); | |
147 | } | |
148 | return; | |
149 | } | |
150 | ||
151 | /* we trust the server, so update it */ | |
152 | set_nlink(inode, fattr->cf_nlink); | |
153 | } | |
154 | ||
cc0bad75 JL |
155 | /* populate an inode with info from a cifs_fattr struct */ |
156 | void | |
157 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 158 | { |
cc0bad75 | 159 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 160 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 161 | |
df2cf170 JL |
162 | cifs_revalidate_cache(inode, fattr); |
163 | ||
b7ca6928 | 164 | spin_lock(&inode->i_lock); |
9b9c5bea SF |
165 | /* we do not want atime to be less than mtime, it broke some apps */ |
166 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime)) | |
167 | inode->i_atime = fattr->cf_mtime; | |
168 | else | |
169 | inode->i_atime = fattr->cf_atime; | |
95390201 AB |
170 | inode->i_mtime = fattr->cf_mtime; |
171 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 172 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 173 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
174 | inode->i_uid = fattr->cf_uid; |
175 | inode->i_gid = fattr->cf_gid; | |
176 | ||
0b8f18e3 JL |
177 | /* if dynperm is set, don't clobber existing mode */ |
178 | if (inode->i_state & I_NEW || | |
179 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
180 | inode->i_mode = fattr->cf_mode; | |
181 | ||
cc0bad75 | 182 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 183 | |
0b8f18e3 JL |
184 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
185 | cifs_i->time = 0; | |
186 | else | |
187 | cifs_i->time = jiffies; | |
188 | ||
aff8d5ca JL |
189 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
190 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
191 | else | |
192 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 193 | |
835a36ca | 194 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
195 | /* |
196 | * Can't safely change the file size here if the client is writing to | |
197 | * it due to potential races. | |
198 | */ | |
cc0bad75 JL |
199 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
200 | i_size_write(inode, fattr->cf_eof); | |
201 | ||
202 | /* | |
203 | * i_blocks is not related to (i_size / i_blksize), | |
204 | * but instead 512 byte (2**9) size is required for | |
205 | * calculating num blocks. | |
206 | */ | |
207 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
208 | } | |
209 | spin_unlock(&inode->i_lock); | |
210 | ||
01c64fea DH |
211 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
212 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
213 | if (inode->i_state & I_NEW) |
214 | cifs_set_ops(inode); | |
cc0bad75 JL |
215 | } |
216 | ||
4065c802 JL |
217 | void |
218 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
219 | { | |
220 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
221 | ||
222 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
223 | return; | |
224 | ||
225 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
226 | } | |
227 | ||
cc0bad75 JL |
228 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
229 | void | |
230 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
231 | struct cifs_sb_info *cifs_sb) | |
232 | { | |
233 | memset(fattr, 0, sizeof(*fattr)); | |
234 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
235 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
236 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
237 | ||
238 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
239 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
240 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
241 | /* old POSIX extensions don't get create time */ |
242 | ||
cc0bad75 | 243 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
244 | |
245 | /* | |
246 | * Since we set the inode type below we need to mask off | |
247 | * to avoid strange results if bits set above. | |
248 | */ | |
cc0bad75 | 249 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
250 | switch (le32_to_cpu(info->Type)) { |
251 | case UNIX_FILE: | |
cc0bad75 JL |
252 | fattr->cf_mode |= S_IFREG; |
253 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
254 | break; |
255 | case UNIX_SYMLINK: | |
cc0bad75 JL |
256 | fattr->cf_mode |= S_IFLNK; |
257 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
258 | break; |
259 | case UNIX_DIR: | |
cc0bad75 JL |
260 | fattr->cf_mode |= S_IFDIR; |
261 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
262 | break; |
263 | case UNIX_CHARDEV: | |
cc0bad75 JL |
264 | fattr->cf_mode |= S_IFCHR; |
265 | fattr->cf_dtype = DT_CHR; | |
266 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
267 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
268 | break; |
269 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
270 | fattr->cf_mode |= S_IFBLK; |
271 | fattr->cf_dtype = DT_BLK; | |
272 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
273 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
274 | break; |
275 | case UNIX_FIFO: | |
cc0bad75 JL |
276 | fattr->cf_mode |= S_IFIFO; |
277 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
278 | break; |
279 | case UNIX_SOCKET: | |
cc0bad75 JL |
280 | fattr->cf_mode |= S_IFSOCK; |
281 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
282 | break; |
283 | default: | |
284 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
285 | fattr->cf_mode |= S_IFREG; |
286 | fattr->cf_dtype = DT_REG; | |
f96637be | 287 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
288 | break; |
289 | } | |
290 | ||
46bbc25f EB |
291 | fattr->cf_uid = cifs_sb->mnt_uid; |
292 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { | |
293 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
294 | if (id < ((uid_t)-1)) { |
295 | kuid_t uid = make_kuid(&init_user_ns, id); | |
296 | if (uid_valid(uid)) | |
297 | fattr->cf_uid = uid; | |
298 | } | |
46bbc25f EB |
299 | } |
300 | ||
301 | fattr->cf_gid = cifs_sb->mnt_gid; | |
302 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { | |
303 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
304 | if (id < ((gid_t)-1)) { |
305 | kgid_t gid = make_kgid(&init_user_ns, id); | |
306 | if (gid_valid(gid)) | |
307 | fattr->cf_gid = gid; | |
308 | } | |
46bbc25f | 309 | } |
75f12983 | 310 | |
cc0bad75 | 311 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
312 | } |
313 | ||
b9a3260f | 314 | /* |
cc0bad75 JL |
315 | * Fill a cifs_fattr struct with fake inode info. |
316 | * | |
317 | * Needed to setup cifs_fattr data for the directory which is the | |
318 | * junction to the new submount (ie to setup the fake directory | |
319 | * which represents a DFS referral). | |
b9a3260f | 320 | */ |
f1230c97 | 321 | static void |
cc0bad75 | 322 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 323 | { |
cc0bad75 | 324 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 325 | |
f96637be | 326 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
327 | |
328 | memset(fattr, 0, sizeof(*fattr)); | |
329 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
330 | fattr->cf_uid = cifs_sb->mnt_uid; | |
331 | fattr->cf_gid = cifs_sb->mnt_gid; | |
95390201 AB |
332 | ktime_get_real_ts64(&fattr->cf_mtime); |
333 | fattr->cf_mtime = timespec64_trunc(fattr->cf_mtime, sb->s_time_gran); | |
e37fea58 | 334 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
cc0bad75 JL |
335 | fattr->cf_nlink = 2; |
336 | fattr->cf_flags |= CIFS_FATTR_DFS_REFERRAL; | |
0e4bbde9 SF |
337 | } |
338 | ||
4ad65044 PS |
339 | static int |
340 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
341 | { |
342 | int rc; | |
6d5786a3 | 343 | unsigned int xid; |
abab095d JL |
344 | FILE_UNIX_BASIC_INFO find_data; |
345 | struct cifs_fattr fattr; | |
496ad9aa | 346 | struct inode *inode = file_inode(filp); |
abab095d | 347 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 348 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 349 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 350 | |
6d5786a3 | 351 | xid = get_xid(); |
4b4de76e | 352 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
353 | if (!rc) { |
354 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
355 | } else if (rc == -EREMOTE) { | |
356 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
357 | rc = 0; | |
358 | } | |
359 | ||
360 | cifs_fattr_to_inode(inode, &fattr); | |
6d5786a3 | 361 | free_xid(xid); |
abab095d JL |
362 | return rc; |
363 | } | |
364 | ||
1da177e4 | 365 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 366 | const unsigned char *full_path, |
6d5786a3 | 367 | struct super_block *sb, unsigned int xid) |
1da177e4 | 368 | { |
cc0bad75 | 369 | int rc; |
0e4bbde9 | 370 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 371 | struct cifs_fattr fattr; |
96daf2b0 | 372 | struct cifs_tcon *tcon; |
7ffec372 | 373 | struct tcon_link *tlink; |
1da177e4 | 374 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 375 | |
f96637be | 376 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 377 | |
7ffec372 JL |
378 | tlink = cifs_sb_tlink(cifs_sb); |
379 | if (IS_ERR(tlink)) | |
380 | return PTR_ERR(tlink); | |
381 | tcon = tlink_tcon(tlink); | |
382 | ||
1da177e4 | 383 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 384 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 385 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 386 | cifs_put_tlink(tlink); |
e911d0cc | 387 | |
cc0bad75 JL |
388 | if (!rc) { |
389 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
390 | } else if (rc == -EREMOTE) { | |
391 | cifs_create_dfs_fattr(&fattr, sb); | |
392 | rc = 0; | |
393 | } else { | |
394 | return rc; | |
395 | } | |
1da177e4 | 396 | |
1b12b9c1 SM |
397 | /* check for Minshall+French symlinks */ |
398 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
399 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
400 | full_path); | |
1b12b9c1 | 401 | if (tmprc) |
cb084b1a | 402 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
403 | } |
404 | ||
0e4bbde9 | 405 | if (*pinode == NULL) { |
cc0bad75 | 406 | /* get new inode */ |
4065c802 | 407 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
408 | *pinode = cifs_iget(sb, &fattr); |
409 | if (!*pinode) | |
0e4bbde9 | 410 | rc = -ENOMEM; |
cc0bad75 JL |
411 | } else { |
412 | /* we already have inode, update it */ | |
7196ac11 NA |
413 | |
414 | /* if uniqueid is different, return error */ | |
415 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
416 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
417 | rc = -ESTALE; | |
418 | goto cgiiu_exit; | |
419 | } | |
420 | ||
421 | /* if filetype is different, return error */ | |
422 | if (unlikely(((*pinode)->i_mode & S_IFMT) != | |
423 | (fattr.cf_mode & S_IFMT))) { | |
424 | rc = -ESTALE; | |
425 | goto cgiiu_exit; | |
426 | } | |
427 | ||
cc0bad75 | 428 | cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 429 | } |
1da177e4 | 430 | |
7196ac11 | 431 | cgiiu_exit: |
1da177e4 LT |
432 | return rc; |
433 | } | |
434 | ||
0b8f18e3 | 435 | static int |
0360d605 | 436 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 437 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
438 | { |
439 | int rc; | |
db8b631d | 440 | __u32 oplock; |
7ffec372 | 441 | struct tcon_link *tlink; |
96daf2b0 | 442 | struct cifs_tcon *tcon; |
d81b8a40 PS |
443 | struct cifs_fid fid; |
444 | struct cifs_open_parms oparms; | |
d4ffff1f | 445 | struct cifs_io_parms io_parms; |
86c96b4b | 446 | char buf[24]; |
d6e2f2a4 | 447 | unsigned int bytes_read; |
fb8c4b14 | 448 | char *pbuf; |
0360d605 | 449 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
450 | |
451 | pbuf = buf; | |
452 | ||
0b8f18e3 JL |
453 | fattr->cf_mode &= ~S_IFMT; |
454 | ||
455 | if (fattr->cf_eof == 0) { | |
456 | fattr->cf_mode |= S_IFIFO; | |
457 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 458 | return 0; |
0b8f18e3 JL |
459 | } else if (fattr->cf_eof < 8) { |
460 | fattr->cf_mode |= S_IFREG; | |
461 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
462 | return -EINVAL; /* EOPNOTSUPP? */ |
463 | } | |
50c2f753 | 464 | |
7ffec372 JL |
465 | tlink = cifs_sb_tlink(cifs_sb); |
466 | if (IS_ERR(tlink)) | |
467 | return PTR_ERR(tlink); | |
468 | tcon = tlink_tcon(tlink); | |
469 | ||
d81b8a40 PS |
470 | oparms.tcon = tcon; |
471 | oparms.cifs_sb = cifs_sb; | |
472 | oparms.desired_access = GENERIC_READ; | |
473 | oparms.create_options = CREATE_NOT_DIR; | |
5e19697b SF |
474 | if (backup_cred(cifs_sb)) |
475 | oparms.create_options |= CREATE_OPEN_BACKUP_INTENT; | |
d81b8a40 PS |
476 | oparms.disposition = FILE_OPEN; |
477 | oparms.path = path; | |
478 | oparms.fid = &fid; | |
479 | oparms.reconnect = false; | |
480 | ||
db8b631d SF |
481 | if (tcon->ses->server->oplocks) |
482 | oplock = REQ_OPLOCK; | |
483 | else | |
484 | oplock = 0; | |
485 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 486 | if (rc) { |
db8b631d | 487 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
488 | cifs_put_tlink(tlink); |
489 | return rc; | |
490 | } | |
491 | ||
492 | /* Read header */ | |
d81b8a40 | 493 | io_parms.netfid = fid.netfid; |
0360d605 PS |
494 | io_parms.pid = current->tgid; |
495 | io_parms.tcon = tcon; | |
496 | io_parms.offset = 0; | |
497 | io_parms.length = 24; | |
498 | ||
db8b631d SF |
499 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
500 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
501 | if ((rc == 0) && (bytes_read >= 8)) { |
502 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
503 | cifs_dbg(FYI, "Block device\n"); | |
504 | fattr->cf_mode |= S_IFBLK; | |
505 | fattr->cf_dtype = DT_BLK; | |
506 | if (bytes_read == 24) { | |
507 | /* we have enough to decode dev num */ | |
508 | __u64 mjr; /* major */ | |
509 | __u64 mnr; /* minor */ | |
510 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
511 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
512 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 513 | } |
0360d605 PS |
514 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
515 | cifs_dbg(FYI, "Char device\n"); | |
516 | fattr->cf_mode |= S_IFCHR; | |
517 | fattr->cf_dtype = DT_CHR; | |
518 | if (bytes_read == 24) { | |
519 | /* we have enough to decode dev num */ | |
520 | __u64 mjr; /* major */ | |
521 | __u64 mnr; /* minor */ | |
522 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
523 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
524 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
525 | } | |
526 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
527 | cifs_dbg(FYI, "Symlink\n"); | |
528 | fattr->cf_mode |= S_IFLNK; | |
529 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 530 | } else { |
0360d605 | 531 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 532 | fattr->cf_dtype = DT_REG; |
0360d605 | 533 | rc = -EOPNOTSUPP; |
fb8c4b14 | 534 | } |
0360d605 PS |
535 | } else { |
536 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
537 | fattr->cf_dtype = DT_REG; | |
538 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 539 | } |
db8b631d SF |
540 | |
541 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 542 | cifs_put_tlink(tlink); |
d6e2f2a4 | 543 | return rc; |
d6e2f2a4 SF |
544 | } |
545 | ||
9e294f1c SF |
546 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
547 | ||
0b8f18e3 JL |
548 | /* |
549 | * Fetch mode bits as provided by SFU. | |
550 | * | |
551 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
552 | */ | |
553 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 554 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 555 | { |
3020a1f5 | 556 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
557 | ssize_t rc; |
558 | char ea_value[4]; | |
559 | __u32 mode; | |
7ffec372 | 560 | struct tcon_link *tlink; |
96daf2b0 | 561 | struct cifs_tcon *tcon; |
7ffec372 JL |
562 | |
563 | tlink = cifs_sb_tlink(cifs_sb); | |
564 | if (IS_ERR(tlink)) | |
565 | return PTR_ERR(tlink); | |
566 | tcon = tlink_tcon(tlink); | |
9e294f1c | 567 | |
d979f3b0 SF |
568 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
569 | cifs_put_tlink(tlink); | |
570 | return -EOPNOTSUPP; | |
571 | } | |
572 | ||
573 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
574 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 575 | cifs_sb); |
7ffec372 | 576 | cifs_put_tlink(tlink); |
4523cc30 | 577 | if (rc < 0) |
9e294f1c SF |
578 | return (int)rc; |
579 | else if (rc > 3) { | |
580 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 581 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
582 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
583 | mode, fattr->cf_mode); | |
0b8f18e3 | 584 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 585 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 586 | } |
0b8f18e3 JL |
587 | |
588 | return 0; | |
3020a1f5 SF |
589 | #else |
590 | return -EOPNOTSUPP; | |
591 | #endif | |
9e294f1c SF |
592 | } |
593 | ||
0b8f18e3 | 594 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 595 | static void |
0b8f18e3 | 596 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 597 | struct super_block *sb, bool adjust_tz, |
eb85d94b | 598 | bool symlink) |
b9a3260f | 599 | { |
e37fea58 | 600 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 601 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 602 | |
0b8f18e3 JL |
603 | memset(fattr, 0, sizeof(*fattr)); |
604 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
605 | if (info->DeletePending) | |
606 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
607 | ||
608 | if (info->LastAccessTime) | |
609 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
e37fea58 | 610 | else { |
95390201 AB |
611 | ktime_get_real_ts64(&fattr->cf_atime); |
612 | fattr->cf_atime = timespec64_trunc(fattr->cf_atime, sb->s_time_gran); | |
e37fea58 | 613 | } |
0b8f18e3 JL |
614 | |
615 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
616 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
617 | ||
618 | if (adjust_tz) { | |
0d424ad0 JL |
619 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
620 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
621 | } |
622 | ||
623 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
624 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 625 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 626 | |
74d290da | 627 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
eb85d94b PS |
628 | |
629 | if (symlink) { | |
630 | fattr->cf_mode = S_IFLNK; | |
631 | fattr->cf_dtype = DT_LNK; | |
632 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
0b8f18e3 JL |
633 | fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode; |
634 | fattr->cf_dtype = DT_DIR; | |
6de2ce42 PS |
635 | /* |
636 | * Server can return wrong NumberOfLinks value for directories | |
637 | * when Unix extensions are disabled - fake it. | |
638 | */ | |
74d290da JM |
639 | if (!tcon->unix_ext) |
640 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 JL |
641 | } else { |
642 | fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode; | |
643 | fattr->cf_dtype = DT_REG; | |
0b8f18e3 | 644 | |
d0c280d2 JL |
645 | /* clear write bits if ATTR_READONLY is set */ |
646 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
647 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 648 | |
74d290da JM |
649 | /* |
650 | * Don't accept zero nlink from non-unix servers unless | |
651 | * delete is pending. Instead mark it as unknown. | |
652 | */ | |
653 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
654 | !info->DeletePending) { | |
655 | cifs_dbg(1, "bogus file nlink value %u\n", | |
6658b9f7 | 656 | fattr->cf_nlink); |
74d290da | 657 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 658 | } |
6de2ce42 | 659 | } |
0b8f18e3 JL |
660 | |
661 | fattr->cf_uid = cifs_sb->mnt_uid; | |
662 | fattr->cf_gid = cifs_sb->mnt_gid; | |
b9a3260f SF |
663 | } |
664 | ||
4ad65044 PS |
665 | static int |
666 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
667 | { |
668 | int rc; | |
6d5786a3 | 669 | unsigned int xid; |
abab095d JL |
670 | FILE_ALL_INFO find_data; |
671 | struct cifs_fattr fattr; | |
496ad9aa | 672 | struct inode *inode = file_inode(filp); |
c21dfb69 | 673 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 674 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
675 | struct TCP_Server_Info *server = tcon->ses->server; |
676 | ||
677 | if (!server->ops->query_file_info) | |
678 | return -ENOSYS; | |
abab095d | 679 | |
6d5786a3 | 680 | xid = get_xid(); |
4ad65044 | 681 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
682 | switch (rc) { |
683 | case 0: | |
e37fea58 | 684 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
eb85d94b | 685 | false); |
42274bb2 PS |
686 | break; |
687 | case -EREMOTE: | |
688 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
689 | rc = 0; | |
690 | break; | |
691 | case -EOPNOTSUPP: | |
692 | case -EINVAL: | |
abab095d JL |
693 | /* |
694 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
695 | * for now, just skip revalidating and mark inode for |
696 | * immediate reval. | |
697 | */ | |
abab095d JL |
698 | rc = 0; |
699 | CIFS_I(inode)->time = 0; | |
42274bb2 | 700 | default: |
abab095d | 701 | goto cgfi_exit; |
42274bb2 | 702 | } |
abab095d JL |
703 | |
704 | /* | |
705 | * don't bother with SFU junk here -- just mark inode as needing | |
706 | * revalidation. | |
707 | */ | |
abab095d JL |
708 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
709 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
710 | cifs_fattr_to_inode(inode, &fattr); | |
711 | cgfi_exit: | |
6d5786a3 | 712 | free_xid(xid); |
abab095d JL |
713 | return rc; |
714 | } | |
715 | ||
7ea884c7 SF |
716 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
717 | static __u64 simple_hashstr(const char *str) | |
718 | { | |
3995bbf5 | 719 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
7ea884c7 SF |
720 | __u64 hash = 0; |
721 | ||
722 | while (*str) | |
723 | hash = (hash + (__u64) *str++) * hash_mult; | |
724 | ||
725 | return hash; | |
726 | } | |
727 | ||
1208ef1f PS |
728 | int |
729 | cifs_get_inode_info(struct inode **inode, const char *full_path, | |
730 | FILE_ALL_INFO *data, struct super_block *sb, int xid, | |
42eacf9e | 731 | const struct cifs_fid *fid) |
1da177e4 | 732 | { |
c052e2b4 SP |
733 | bool validinum = false; |
734 | __u16 srchflgs; | |
735 | int rc = 0, tmprc = ENOSYS; | |
1208ef1f PS |
736 | struct cifs_tcon *tcon; |
737 | struct TCP_Server_Info *server; | |
7ffec372 | 738 | struct tcon_link *tlink; |
1da177e4 | 739 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 740 | char *buf = NULL; |
1208ef1f | 741 | bool adjust_tz = false; |
0b8f18e3 | 742 | struct cifs_fattr fattr; |
c052e2b4 | 743 | struct cifs_search_info *srchinf = NULL; |
eb85d94b | 744 | bool symlink = false; |
1da177e4 | 745 | |
7ffec372 JL |
746 | tlink = cifs_sb_tlink(cifs_sb); |
747 | if (IS_ERR(tlink)) | |
748 | return PTR_ERR(tlink); | |
1208ef1f PS |
749 | tcon = tlink_tcon(tlink); |
750 | server = tcon->ses->server; | |
7ffec372 | 751 | |
f96637be | 752 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
1da177e4 | 753 | |
1208ef1f | 754 | if ((data == NULL) && (*inode != NULL)) { |
57c55cd7 RS |
755 | if (CIFS_CACHE_READ(CIFS_I(*inode)) && |
756 | CIFS_I(*inode)->time != 0) { | |
f96637be | 757 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
7ffec372 | 758 | goto cgii_exit; |
1da177e4 LT |
759 | } |
760 | } | |
761 | ||
1208ef1f PS |
762 | /* if inode info is not passed, get it from server */ |
763 | if (data == NULL) { | |
764 | if (!server->ops->query_path_info) { | |
765 | rc = -ENOSYS; | |
766 | goto cgii_exit; | |
767 | } | |
1da177e4 | 768 | buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
7ffec372 JL |
769 | if (buf == NULL) { |
770 | rc = -ENOMEM; | |
771 | goto cgii_exit; | |
772 | } | |
1208ef1f PS |
773 | data = (FILE_ALL_INFO *)buf; |
774 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, full_path, | |
eb85d94b | 775 | data, &adjust_tz, &symlink); |
1da177e4 | 776 | } |
0b8f18e3 JL |
777 | |
778 | if (!rc) { | |
e37fea58 | 779 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, |
eb85d94b | 780 | symlink); |
0b8f18e3 JL |
781 | } else if (rc == -EREMOTE) { |
782 | cifs_create_dfs_fattr(&fattr, sb); | |
b9a3260f | 783 | rc = 0; |
1e77a8c2 SF |
784 | } else if ((rc == -EACCES) && backup_cred(cifs_sb) && |
785 | (strcmp(server->vals->version_string, SMB1_VERSION_STRING) | |
786 | == 0)) { | |
3b7960ca SF |
787 | /* |
788 | * For SMB2 and later the backup intent flag is already | |
789 | * sent if needed on open and there is no path based | |
790 | * FindFirst operation to use to retry with | |
791 | */ | |
792 | ||
793 | srchinf = kzalloc(sizeof(struct cifs_search_info), | |
794 | GFP_KERNEL); | |
795 | if (srchinf == NULL) { | |
796 | rc = -ENOMEM; | |
797 | goto cgii_exit; | |
798 | } | |
c052e2b4 | 799 | |
3b7960ca SF |
800 | srchinf->endOfSearch = false; |
801 | if (tcon->unix_ext) | |
802 | srchinf->info_level = SMB_FIND_FILE_UNIX; | |
803 | else if ((tcon->ses->capabilities & | |
804 | tcon->ses->server->vals->cap_nt_find) == 0) | |
805 | srchinf->info_level = SMB_FIND_FILE_INFO_STANDARD; | |
806 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
c052e2b4 | 807 | srchinf->info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; |
3b7960ca SF |
808 | else /* no srvino useful for fallback to some netapp */ |
809 | srchinf->info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
c052e2b4 | 810 | |
3b7960ca SF |
811 | srchflgs = CIFS_SEARCH_CLOSE_ALWAYS | |
812 | CIFS_SEARCH_CLOSE_AT_END | | |
813 | CIFS_SEARCH_BACKUP_SEARCH; | |
c052e2b4 | 814 | |
3b7960ca SF |
815 | rc = CIFSFindFirst(xid, tcon, full_path, |
816 | cifs_sb, NULL, srchflgs, srchinf, false); | |
817 | if (!rc) { | |
818 | data = (FILE_ALL_INFO *)srchinf->srch_entries_start; | |
c052e2b4 | 819 | |
3b7960ca SF |
820 | cifs_dir_info_to_fattr(&fattr, |
821 | (FILE_DIRECTORY_INFO *)data, cifs_sb); | |
822 | fattr.cf_uniqueid = le64_to_cpu( | |
823 | ((SEARCH_ID_FULL_DIR_INFO *)data)->UniqueId); | |
824 | validinum = true; | |
c052e2b4 | 825 | |
3b7960ca SF |
826 | cifs_buf_release(srchinf->ntwrk_buf_start); |
827 | } | |
828 | kfree(srchinf); | |
829 | if (rc) | |
830 | goto cgii_exit; | |
c052e2b4 | 831 | } else |
7962670e | 832 | goto cgii_exit; |
1da177e4 | 833 | |
0b8f18e3 JL |
834 | /* |
835 | * If an inode wasn't passed in, then get the inode number | |
836 | * | |
837 | * Is an i_ino of zero legal? Can we use that to check if the server | |
838 | * supports returning inode numbers? Are there other sanity checks we | |
839 | * can use to ensure that the server is really filling in that field? | |
0b8f18e3 | 840 | */ |
1208ef1f | 841 | if (*inode == NULL) { |
b9a3260f | 842 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
c052e2b4 SP |
843 | if (validinum == false) { |
844 | if (server->ops->get_srv_inum) | |
845 | tmprc = server->ops->get_srv_inum(xid, | |
846 | tcon, cifs_sb, full_path, | |
847 | &fattr.cf_uniqueid, data); | |
848 | if (tmprc) { | |
f96637be JP |
849 | cifs_dbg(FYI, "GetSrvInodeNum rc %d\n", |
850 | tmprc); | |
c052e2b4 SP |
851 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
852 | cifs_autodisable_serverino(cifs_sb); | |
7ea884c7 SF |
853 | } else if ((fattr.cf_uniqueid == 0) && |
854 | strlen(full_path) == 0) { | |
855 | /* some servers ret bad root ino ie 0 */ | |
856 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
857 | fattr.cf_flags |= | |
858 | CIFS_FATTR_FAKE_ROOT_INO; | |
859 | fattr.cf_uniqueid = | |
860 | simple_hashstr(tcon->treeName); | |
c052e2b4 | 861 | } |
132ac7b7 | 862 | } |
c052e2b4 | 863 | } else |
0b8f18e3 | 864 | fattr.cf_uniqueid = iunique(sb, ROOT_I); |
a108471b RL |
865 | } else { |
866 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && | |
867 | validinum == false && server->ops->get_srv_inum) { | |
868 | /* | |
869 | * Pass a NULL tcon to ensure we don't make a round | |
870 | * trip to the server. This only works for SMB2+. | |
871 | */ | |
872 | tmprc = server->ops->get_srv_inum(xid, | |
873 | NULL, cifs_sb, full_path, | |
874 | &fattr.cf_uniqueid, data); | |
875 | if (tmprc) | |
876 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
7ea884c7 SF |
877 | else if ((fattr.cf_uniqueid == 0) && |
878 | strlen(full_path) == 0) { | |
879 | /* | |
880 | * Reuse existing root inode num since | |
881 | * inum zero for root causes ls of . and .. to | |
882 | * not be returned | |
883 | */ | |
884 | cifs_dbg(FYI, "Srv ret 0 inode num for root\n"); | |
885 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
886 | } | |
a108471b RL |
887 | } else |
888 | fattr.cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
889 | } | |
b9a3260f | 890 | |
0b8f18e3 JL |
891 | /* query for SFU type info if supported and needed */ |
892 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
893 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
894 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
895 | if (tmprc) | |
f96637be | 896 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 897 | } |
1da177e4 | 898 | |
79df1bae | 899 | #ifdef CONFIG_CIFS_ACL |
b9a3260f SF |
900 | /* fill in 0777 bits from ACL */ |
901 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
1208ef1f | 902 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, full_path, fid); |
78415d2d | 903 | if (rc) { |
f96637be JP |
904 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
905 | __func__, rc); | |
78415d2d SP |
906 | goto cgii_exit; |
907 | } | |
b9a3260f | 908 | } |
79df1bae | 909 | #endif /* CONFIG_CIFS_ACL */ |
b9a3260f | 910 | |
0b8f18e3 JL |
911 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
912 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
913 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 914 | |
1b12b9c1 SM |
915 | /* check for Minshall+French symlinks */ |
916 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
917 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
918 | full_path); | |
1b12b9c1 | 919 | if (tmprc) |
cb084b1a | 920 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
921 | } |
922 | ||
1208ef1f PS |
923 | if (!*inode) { |
924 | *inode = cifs_iget(sb, &fattr); | |
925 | if (!*inode) | |
0b8f18e3 JL |
926 | rc = -ENOMEM; |
927 | } else { | |
7196ac11 NA |
928 | /* we already have inode, update it */ |
929 | ||
a108471b RL |
930 | /* if uniqueid is different, return error */ |
931 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
932 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
933 | rc = -ESTALE; | |
934 | goto cgii_exit; | |
935 | } | |
936 | ||
7196ac11 NA |
937 | /* if filetype is different, return error */ |
938 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
939 | (fattr.cf_mode & S_IFMT))) { | |
940 | rc = -ESTALE; | |
941 | goto cgii_exit; | |
942 | } | |
943 | ||
1208ef1f | 944 | cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 945 | } |
b9a3260f | 946 | |
7962670e | 947 | cgii_exit: |
7ea884c7 SF |
948 | if ((*inode) && ((*inode)->i_ino == 0)) |
949 | cifs_dbg(FYI, "inode number of zero returned\n"); | |
950 | ||
1da177e4 | 951 | kfree(buf); |
7ffec372 | 952 | cifs_put_tlink(tlink); |
1da177e4 LT |
953 | return rc; |
954 | } | |
955 | ||
7f8ed420 SF |
956 | static const struct inode_operations cifs_ipc_inode_ops = { |
957 | .lookup = cifs_lookup, | |
958 | }; | |
959 | ||
cc0bad75 JL |
960 | static int |
961 | cifs_find_inode(struct inode *inode, void *opaque) | |
962 | { | |
963 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
964 | ||
f30b9c11 | 965 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
966 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
967 | return 0; | |
968 | ||
20054bd6 JL |
969 | /* use createtime like an i_generation field */ |
970 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
971 | return 0; | |
972 | ||
f30b9c11 JL |
973 | /* don't match inode of different type */ |
974 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
975 | return 0; | |
976 | ||
5acfec25 | 977 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 978 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 979 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 980 | |
cc0bad75 JL |
981 | return 1; |
982 | } | |
983 | ||
984 | static int | |
985 | cifs_init_inode(struct inode *inode, void *opaque) | |
986 | { | |
987 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
988 | ||
989 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 990 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
991 | return 0; |
992 | } | |
993 | ||
5acfec25 JL |
994 | /* |
995 | * walk dentry list for an inode and report whether it has aliases that | |
996 | * are hashed. We use this to determine if a directory inode can actually | |
997 | * be used. | |
998 | */ | |
999 | static bool | |
1000 | inode_has_hashed_dentries(struct inode *inode) | |
1001 | { | |
1002 | struct dentry *dentry; | |
1003 | ||
873feea0 | 1004 | spin_lock(&inode->i_lock); |
946e51f2 | 1005 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1006 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1007 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1008 | return true; |
1009 | } | |
1010 | } | |
873feea0 | 1011 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1012 | return false; |
1013 | } | |
1014 | ||
cc0bad75 JL |
1015 | /* Given fattrs, get a corresponding inode */ |
1016 | struct inode * | |
1017 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1018 | { | |
1019 | unsigned long hash; | |
1020 | struct inode *inode; | |
1021 | ||
3d694380 | 1022 | retry_iget5_locked: |
f96637be | 1023 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1024 | |
1025 | /* hash down to 32-bits on 32-bit arch */ | |
1026 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1027 | ||
1028 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1029 | if (inode) { |
5acfec25 | 1030 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1031 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1032 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1033 | |
1034 | if (inode_has_hashed_dentries(inode)) { | |
1035 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1036 | iput(inode); | |
1037 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1038 | goto retry_iget5_locked; | |
1039 | } | |
3d694380 JL |
1040 | } |
1041 | ||
cc0bad75 | 1042 | cifs_fattr_to_inode(inode, fattr); |
1751e8a6 | 1043 | if (sb->s_flags & SB_NOATIME) |
cc0bad75 JL |
1044 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
1045 | if (inode->i_state & I_NEW) { | |
1046 | inode->i_ino = hash; | |
0ccd4802 | 1047 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1048 | /* initialize per-inode cache cookie pointer */ |
1049 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1050 | #endif |
cc0bad75 JL |
1051 | unlock_new_inode(inode); |
1052 | } | |
1053 | } | |
1054 | ||
1055 | return inode; | |
1056 | } | |
1057 | ||
1da177e4 | 1058 | /* gets root inode */ |
9b6763e0 | 1059 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1060 | { |
6d5786a3 | 1061 | unsigned int xid; |
0d424ad0 | 1062 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1063 | struct inode *inode = NULL; |
ce634ab2 | 1064 | long rc; |
96daf2b0 | 1065 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1066 | char *path = NULL; |
1067 | int len; | |
1068 | ||
1069 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1070 | && cifs_sb->prepath) { | |
1071 | len = strlen(cifs_sb->prepath); | |
1072 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1073 | if (path == NULL) | |
1074 | return ERR_PTR(-ENOMEM); | |
1075 | path[0] = '/'; | |
1076 | memcpy(path+1, cifs_sb->prepath, len); | |
1077 | } else { | |
1078 | path = kstrdup("", GFP_KERNEL); | |
1079 | if (path == NULL) | |
1080 | return ERR_PTR(-ENOMEM); | |
1081 | } | |
ce634ab2 | 1082 | |
6d5786a3 | 1083 | xid = get_xid(); |
b5b374ea | 1084 | if (tcon->unix_ext) { |
a6b5058f | 1085 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1086 | /* some servers mistakenly claim POSIX support */ |
1087 | if (rc != -EOPNOTSUPP) | |
1088 | goto iget_no_retry; | |
1089 | cifs_dbg(VFS, "server does not support POSIX extensions"); | |
1090 | tcon->unix_ext = false; | |
1091 | } | |
1092 | ||
a6b5058f AA |
1093 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
1094 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1095 | |
b5b374ea | 1096 | iget_no_retry: |
a7851ce7 OS |
1097 | if (!inode) { |
1098 | inode = ERR_PTR(rc); | |
1099 | goto out; | |
1100 | } | |
cc0bad75 | 1101 | |
0ccd4802 | 1102 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1103 | /* populate tcon->resource_id */ |
0d424ad0 | 1104 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1105 | #endif |
d03382ce | 1106 | |
b327a717 | 1107 | if (rc && tcon->pipe) { |
f96637be | 1108 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1109 | spin_lock(&inode->i_lock); |
7f8ed420 | 1110 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1111 | set_nlink(inode, 2); |
7f8ed420 SF |
1112 | inode->i_op = &cifs_ipc_inode_ops; |
1113 | inode->i_fop = &simple_dir_operations; | |
1114 | inode->i_uid = cifs_sb->mnt_uid; | |
1115 | inode->i_gid = cifs_sb->mnt_gid; | |
b7ca6928 | 1116 | spin_unlock(&inode->i_lock); |
ad661334 | 1117 | } else if (rc) { |
ce634ab2 | 1118 | iget_failed(inode); |
a7851ce7 | 1119 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1120 | } |
1121 | ||
a7851ce7 | 1122 | out: |
a6b5058f | 1123 | kfree(path); |
31cd106b | 1124 | free_xid(xid); |
ce634ab2 | 1125 | return inode; |
1da177e4 LT |
1126 | } |
1127 | ||
ed6875e0 | 1128 | int |
6d5786a3 | 1129 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
ed6875e0 | 1130 | char *full_path, __u32 dosattr) |
388e57b2 | 1131 | { |
388e57b2 | 1132 | bool set_time = false; |
388e57b2 | 1133 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1134 | struct TCP_Server_Info *server; |
388e57b2 SF |
1135 | FILE_BASIC_INFO info_buf; |
1136 | ||
1adcb710 SF |
1137 | if (attrs == NULL) |
1138 | return -EINVAL; | |
1139 | ||
6bdf6dbd PS |
1140 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1141 | if (!server->ops->set_file_info) | |
1142 | return -ENOSYS; | |
1143 | ||
fd09b7d3 SF |
1144 | info_buf.Pad = 0; |
1145 | ||
388e57b2 SF |
1146 | if (attrs->ia_valid & ATTR_ATIME) { |
1147 | set_time = true; | |
1148 | info_buf.LastAccessTime = | |
95390201 | 1149 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
388e57b2 SF |
1150 | } else |
1151 | info_buf.LastAccessTime = 0; | |
1152 | ||
1153 | if (attrs->ia_valid & ATTR_MTIME) { | |
1154 | set_time = true; | |
1155 | info_buf.LastWriteTime = | |
95390201 | 1156 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
388e57b2 SF |
1157 | } else |
1158 | info_buf.LastWriteTime = 0; | |
1159 | ||
1160 | /* | |
1161 | * Samba throws this field away, but windows may actually use it. | |
1162 | * Do not set ctime unless other time stamps are changed explicitly | |
1163 | * (i.e. by utimes()) since we would then have a mix of client and | |
1164 | * server times. | |
1165 | */ | |
1166 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1167 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 | 1168 | info_buf.ChangeTime = |
95390201 | 1169 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
388e57b2 SF |
1170 | } else |
1171 | info_buf.ChangeTime = 0; | |
1172 | ||
1173 | info_buf.CreationTime = 0; /* don't change */ | |
1174 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1175 | ||
6bdf6dbd | 1176 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1177 | } |
1178 | ||
a12a1ac7 | 1179 | /* |
ed6875e0 | 1180 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1181 | * and rename it to a random name that hopefully won't conflict with |
1182 | * anything else. | |
1183 | */ | |
ed6875e0 PS |
1184 | int |
1185 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1186 | const unsigned int xid) | |
a12a1ac7 JL |
1187 | { |
1188 | int oplock = 0; | |
1189 | int rc; | |
d81b8a40 PS |
1190 | struct cifs_fid fid; |
1191 | struct cifs_open_parms oparms; | |
2b0143b5 | 1192 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1193 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1194 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1195 | struct tcon_link *tlink; |
96daf2b0 | 1196 | struct cifs_tcon *tcon; |
3270958b SF |
1197 | __u32 dosattr, origattr; |
1198 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1199 | |
7ffec372 JL |
1200 | tlink = cifs_sb_tlink(cifs_sb); |
1201 | if (IS_ERR(tlink)) | |
1202 | return PTR_ERR(tlink); | |
1203 | tcon = tlink_tcon(tlink); | |
1204 | ||
c483a984 SP |
1205 | /* |
1206 | * We cannot rename the file if the server doesn't support | |
1207 | * CAP_INFOLEVEL_PASSTHRU | |
1208 | */ | |
1209 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1210 | rc = -EBUSY; | |
1211 | goto out; | |
1212 | } | |
1213 | ||
d81b8a40 PS |
1214 | oparms.tcon = tcon; |
1215 | oparms.cifs_sb = cifs_sb; | |
1216 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
1217 | oparms.create_options = CREATE_NOT_DIR; | |
1218 | oparms.disposition = FILE_OPEN; | |
1219 | oparms.path = full_path; | |
1220 | oparms.fid = &fid; | |
1221 | oparms.reconnect = false; | |
1222 | ||
1223 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1224 | if (rc != 0) |
1225 | goto out; | |
1226 | ||
3270958b SF |
1227 | origattr = cifsInode->cifsAttrs; |
1228 | if (origattr == 0) | |
1229 | origattr |= ATTR_NORMAL; | |
1230 | ||
1231 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1232 | if (dosattr == 0) |
1233 | dosattr |= ATTR_NORMAL; | |
1234 | dosattr |= ATTR_HIDDEN; | |
1235 | ||
3270958b SF |
1236 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1237 | if (dosattr != origattr) { | |
1238 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1239 | if (info_buf == NULL) { | |
1240 | rc = -ENOMEM; | |
1241 | goto out_close; | |
1242 | } | |
1243 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1244 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1245 | current->tgid); |
1246 | /* although we would like to mark the file hidden | |
1247 | if that fails we will still try to rename it */ | |
72d282dc | 1248 | if (!rc) |
3270958b SF |
1249 | cifsInode->cifsAttrs = dosattr; |
1250 | else | |
1251 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1252 | } |
a12a1ac7 | 1253 | |
dd1db2de | 1254 | /* rename the file */ |
d81b8a40 PS |
1255 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1256 | cifs_sb->local_nls, | |
2baa2682 | 1257 | cifs_remap(cifs_sb)); |
3270958b | 1258 | if (rc != 0) { |
47c78f4a | 1259 | rc = -EBUSY; |
3270958b SF |
1260 | goto undo_setattr; |
1261 | } | |
6d22f098 | 1262 | |
3270958b | 1263 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1264 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1265 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1266 | current->tgid); |
1267 | /* | |
1268 | * some samba versions return -ENOENT when we try to set the | |
1269 | * file disposition here. Likely a samba bug, but work around | |
1270 | * it for now. This means that some cifsXXX files may hang | |
1271 | * around after they shouldn't. | |
1272 | * | |
1273 | * BB: remove this hack after more servers have the fix | |
1274 | */ | |
1275 | if (rc == -ENOENT) | |
1276 | rc = 0; | |
1277 | else if (rc != 0) { | |
47c78f4a | 1278 | rc = -EBUSY; |
3270958b SF |
1279 | goto undo_rename; |
1280 | } | |
aff8d5ca | 1281 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1282 | } |
7ce86d5a | 1283 | |
a12a1ac7 | 1284 | out_close: |
d81b8a40 | 1285 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1286 | out: |
3270958b | 1287 | kfree(info_buf); |
7ffec372 | 1288 | cifs_put_tlink(tlink); |
a12a1ac7 | 1289 | return rc; |
3270958b SF |
1290 | |
1291 | /* | |
1292 | * reset everything back to the original state. Don't bother | |
1293 | * dealing with errors here since we can't do anything about | |
1294 | * them anyway. | |
1295 | */ | |
1296 | undo_rename: | |
d81b8a40 | 1297 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1298 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1299 | undo_setattr: |
1300 | if (dosattr != origattr) { | |
1301 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1302 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1303 | current->tgid)) |
1304 | cifsInode->cifsAttrs = origattr; | |
1305 | } | |
1306 | ||
1307 | goto out_close; | |
a12a1ac7 JL |
1308 | } |
1309 | ||
b7ca6928 SF |
1310 | /* copied from fs/nfs/dir.c with small changes */ |
1311 | static void | |
1312 | cifs_drop_nlink(struct inode *inode) | |
1313 | { | |
1314 | spin_lock(&inode->i_lock); | |
1315 | if (inode->i_nlink > 0) | |
1316 | drop_nlink(inode); | |
1317 | spin_unlock(&inode->i_lock); | |
1318 | } | |
ff694527 SF |
1319 | |
1320 | /* | |
2b0143b5 | 1321 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1322 | * is a negative dentry) then we would attempt a standard SMB delete, but |
af901ca1 AGR |
1323 | * if that fails we can not attempt the fall back mechanisms on EACCESS |
1324 | * but will return the EACCESS to the caller. Note that the VFS does not call | |
ff694527 SF |
1325 | * unlink on negative dentries currently. |
1326 | */ | |
5f0319a7 | 1327 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1328 | { |
1329 | int rc = 0; | |
6d5786a3 | 1330 | unsigned int xid; |
1da177e4 | 1331 | char *full_path = NULL; |
2b0143b5 | 1332 | struct inode *inode = d_inode(dentry); |
ff694527 | 1333 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1334 | struct super_block *sb = dir->i_sb; |
1335 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1336 | struct tcon_link *tlink; |
96daf2b0 | 1337 | struct cifs_tcon *tcon; |
ed6875e0 | 1338 | struct TCP_Server_Info *server; |
6050247d SF |
1339 | struct iattr *attrs = NULL; |
1340 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1341 | |
f96637be | 1342 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1343 | |
7ffec372 JL |
1344 | tlink = cifs_sb_tlink(cifs_sb); |
1345 | if (IS_ERR(tlink)) | |
1346 | return PTR_ERR(tlink); | |
1347 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1348 | server = tcon->ses->server; |
7ffec372 | 1349 | |
6d5786a3 | 1350 | xid = get_xid(); |
1da177e4 | 1351 | |
5f0319a7 JL |
1352 | /* Unlink can be called from rename so we can not take the |
1353 | * sb->s_vfs_rename_mutex here */ | |
1354 | full_path = build_path_from_dentry(dentry); | |
1da177e4 | 1355 | if (full_path == NULL) { |
0f3bc09e | 1356 | rc = -ENOMEM; |
7ffec372 | 1357 | goto unlink_out; |
1da177e4 | 1358 | } |
2d785a50 | 1359 | |
29e20f9c PS |
1360 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1361 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1362 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1363 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1364 | cifs_remap(cifs_sb)); |
f96637be | 1365 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1366 | if ((rc == 0) || (rc == -ENOENT)) |
1367 | goto psx_del_no_retry; | |
1368 | } | |
1da177e4 | 1369 | |
6050247d | 1370 | retry_std_delete: |
ed6875e0 PS |
1371 | if (!server->ops->unlink) { |
1372 | rc = -ENOSYS; | |
1373 | goto psx_del_no_retry; | |
1374 | } | |
1375 | ||
1376 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1377 | |
2d785a50 | 1378 | psx_del_no_retry: |
1da177e4 | 1379 | if (!rc) { |
5f0319a7 | 1380 | if (inode) |
b7ca6928 | 1381 | cifs_drop_nlink(inode); |
1da177e4 | 1382 | } else if (rc == -ENOENT) { |
5f0319a7 | 1383 | d_drop(dentry); |
47c78f4a | 1384 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1385 | if (server->ops->rename_pending_delete) { |
1386 | rc = server->ops->rename_pending_delete(full_path, | |
1387 | dentry, xid); | |
1388 | if (rc == 0) | |
1389 | cifs_drop_nlink(inode); | |
1390 | } | |
ff694527 | 1391 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1392 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1393 | if (attrs == NULL) { | |
1394 | rc = -ENOMEM; | |
1395 | goto out_reval; | |
1da177e4 | 1396 | } |
388e57b2 SF |
1397 | |
1398 | /* try to reset dos attributes */ | |
ff694527 SF |
1399 | cifs_inode = CIFS_I(inode); |
1400 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1401 | if (origattr == 0) |
1402 | origattr |= ATTR_NORMAL; | |
1403 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1404 | if (dosattr == 0) |
1405 | dosattr |= ATTR_NORMAL; | |
1406 | dosattr |= ATTR_HIDDEN; | |
1407 | ||
1408 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1409 | if (rc != 0) |
1410 | goto out_reval; | |
6050247d SF |
1411 | |
1412 | goto retry_std_delete; | |
1da177e4 | 1413 | } |
6050247d SF |
1414 | |
1415 | /* undo the setattr if we errored out and it's needed */ | |
1416 | if (rc != 0 && dosattr != 0) | |
1417 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1418 | ||
388e57b2 | 1419 | out_reval: |
4523cc30 | 1420 | if (inode) { |
ff694527 SF |
1421 | cifs_inode = CIFS_I(inode); |
1422 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1423 | when needed */ |
e37fea58 | 1424 | inode->i_ctime = current_time(inode); |
06bcfedd | 1425 | } |
e37fea58 | 1426 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1427 | cifs_inode = CIFS_I(dir); |
6050247d | 1428 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1429 | unlink_out: |
1da177e4 | 1430 | kfree(full_path); |
6050247d | 1431 | kfree(attrs); |
6d5786a3 | 1432 | free_xid(xid); |
7ffec372 | 1433 | cifs_put_tlink(tlink); |
1da177e4 LT |
1434 | return rc; |
1435 | } | |
1436 | ||
ff691e96 | 1437 | static int |
101b92d9 | 1438 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1439 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1440 | struct cifs_tcon *tcon, const unsigned int xid) | |
1441 | { | |
1442 | int rc = 0; | |
101b92d9 | 1443 | struct inode *inode = NULL; |
ff691e96 PS |
1444 | |
1445 | if (tcon->unix_ext) | |
101b92d9 | 1446 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1447 | xid); |
1448 | else | |
101b92d9 JL |
1449 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1450 | xid, NULL); | |
1451 | ||
ff691e96 PS |
1452 | if (rc) |
1453 | return rc; | |
1454 | ||
ff691e96 PS |
1455 | /* |
1456 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1457 | * from the server or was set bogus. Also, since this is a brand new |
1458 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1459 | */ |
101b92d9 JL |
1460 | if (inode->i_nlink < 2) |
1461 | set_nlink(inode, 2); | |
ff691e96 PS |
1462 | mode &= ~current_umask(); |
1463 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1464 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1465 | mode |= S_ISGID; |
1466 | ||
1467 | if (tcon->unix_ext) { | |
1468 | struct cifs_unix_set_info_args args = { | |
1469 | .mode = mode, | |
1470 | .ctime = NO_CHANGE_64, | |
1471 | .atime = NO_CHANGE_64, | |
1472 | .mtime = NO_CHANGE_64, | |
1473 | .device = 0, | |
1474 | }; | |
1475 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1476 | args.uid = current_fsuid(); |
101b92d9 | 1477 | if (parent->i_mode & S_ISGID) |
49418b2c | 1478 | args.gid = parent->i_gid; |
ff691e96 | 1479 | else |
49418b2c | 1480 | args.gid = current_fsgid(); |
ff691e96 | 1481 | } else { |
49418b2c EB |
1482 | args.uid = INVALID_UID; /* no change */ |
1483 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1484 | } |
1485 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1486 | cifs_sb->local_nls, | |
2baa2682 | 1487 | cifs_remap(cifs_sb)); |
ff691e96 | 1488 | } else { |
f436720e | 1489 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1490 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1491 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1492 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1493 | tcon, xid); |
101b92d9 JL |
1494 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1495 | inode->i_mode = (mode | S_IFDIR); | |
1496 | ||
1497 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1498 | inode->i_uid = current_fsuid(); | |
1499 | if (inode->i_mode & S_ISGID) | |
1500 | inode->i_gid = parent->i_gid; | |
1501 | else | |
1502 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1503 | } |
1504 | } | |
101b92d9 | 1505 | d_instantiate(dentry, inode); |
ff691e96 PS |
1506 | return rc; |
1507 | } | |
1508 | ||
1509 | static int | |
1510 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1511 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1512 | struct cifs_tcon *tcon, const unsigned int xid) | |
1513 | { | |
1514 | int rc = 0; | |
1515 | u32 oplock = 0; | |
1516 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1517 | struct inode *newinode = NULL; | |
1518 | struct cifs_fattr fattr; | |
1519 | ||
1520 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1521 | if (info == NULL) { | |
1522 | rc = -ENOMEM; | |
1523 | goto posix_mkdir_out; | |
1524 | } | |
1525 | ||
1526 | mode &= ~current_umask(); | |
1527 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1528 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1529 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1530 | if (rc == -EOPNOTSUPP) |
1531 | goto posix_mkdir_out; | |
1532 | else if (rc) { | |
f96637be | 1533 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1534 | d_drop(dentry); |
1535 | goto posix_mkdir_out; | |
1536 | } | |
1537 | ||
1538 | if (info->Type == cpu_to_le32(-1)) | |
1539 | /* no return info, go query for it */ | |
1540 | goto posix_mkdir_get_info; | |
1541 | /* | |
1542 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1543 | * need to set uid/gid. | |
1544 | */ | |
1545 | ||
1546 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1547 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1548 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1549 | if (!newinode) | |
1550 | goto posix_mkdir_get_info; | |
1551 | ||
1552 | d_instantiate(dentry, newinode); | |
1553 | ||
1554 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1555 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1556 | dentry, dentry, newinode); | |
ff691e96 PS |
1557 | |
1558 | if (newinode->i_nlink != 2) | |
f96637be JP |
1559 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1560 | newinode->i_nlink); | |
ff691e96 PS |
1561 | #endif |
1562 | ||
1563 | posix_mkdir_out: | |
1564 | kfree(info); | |
1565 | return rc; | |
1566 | posix_mkdir_get_info: | |
1567 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1568 | xid); | |
1569 | goto posix_mkdir_out; | |
1570 | } | |
1571 | ||
18bb1db3 | 1572 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode) |
1da177e4 | 1573 | { |
ff691e96 | 1574 | int rc = 0; |
6d5786a3 | 1575 | unsigned int xid; |
1da177e4 | 1576 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1577 | struct tcon_link *tlink; |
29e20f9c | 1578 | struct cifs_tcon *tcon; |
f436720e | 1579 | struct TCP_Server_Info *server; |
ff691e96 | 1580 | char *full_path; |
1da177e4 | 1581 | |
f96637be JP |
1582 | cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n", |
1583 | mode, inode); | |
1da177e4 | 1584 | |
1da177e4 | 1585 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
1586 | tlink = cifs_sb_tlink(cifs_sb); |
1587 | if (IS_ERR(tlink)) | |
1588 | return PTR_ERR(tlink); | |
29e20f9c | 1589 | tcon = tlink_tcon(tlink); |
7ffec372 | 1590 | |
6d5786a3 | 1591 | xid = get_xid(); |
1da177e4 | 1592 | |
7f57356b | 1593 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1594 | if (full_path == NULL) { |
0f3bc09e | 1595 | rc = -ENOMEM; |
7ffec372 | 1596 | goto mkdir_out; |
1da177e4 | 1597 | } |
50c2f753 | 1598 | |
bea851b8 SF |
1599 | server = tcon->ses->server; |
1600 | ||
bea851b8 SF |
1601 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
1602 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, | |
1603 | cifs_sb); | |
1604 | d_drop(direntry); /* for time being always refresh inode info */ | |
1605 | goto mkdir_out; | |
1606 | } | |
bea851b8 | 1607 | |
29e20f9c PS |
1608 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1609 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1610 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1611 | tcon, xid); | |
1612 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1613 | goto mkdir_out; |
fb8c4b14 | 1614 | } |
ff691e96 | 1615 | |
f436720e PS |
1616 | if (!server->ops->mkdir) { |
1617 | rc = -ENOSYS; | |
1618 | goto mkdir_out; | |
1619 | } | |
1620 | ||
1da177e4 | 1621 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
f436720e | 1622 | rc = server->ops->mkdir(xid, tcon, full_path, cifs_sb); |
1da177e4 | 1623 | if (rc) { |
f96637be | 1624 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1625 | d_drop(direntry); |
ff691e96 | 1626 | goto mkdir_out; |
1da177e4 | 1627 | } |
ff691e96 PS |
1628 | |
1629 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, | |
1630 | xid); | |
fb8c4b14 | 1631 | mkdir_out: |
6de2ce42 PS |
1632 | /* |
1633 | * Force revalidate to get parent dir info when needed since cached | |
1634 | * attributes are invalid now. | |
1635 | */ | |
1636 | CIFS_I(inode)->time = 0; | |
1da177e4 | 1637 | kfree(full_path); |
6d5786a3 | 1638 | free_xid(xid); |
7ffec372 | 1639 | cifs_put_tlink(tlink); |
1da177e4 LT |
1640 | return rc; |
1641 | } | |
1642 | ||
1643 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1644 | { | |
1645 | int rc = 0; | |
6d5786a3 | 1646 | unsigned int xid; |
1da177e4 | 1647 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1648 | struct tcon_link *tlink; |
f958ca5d PS |
1649 | struct cifs_tcon *tcon; |
1650 | struct TCP_Server_Info *server; | |
1da177e4 LT |
1651 | char *full_path = NULL; |
1652 | struct cifsInodeInfo *cifsInode; | |
1653 | ||
f96637be | 1654 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1655 | |
6d5786a3 | 1656 | xid = get_xid(); |
1da177e4 | 1657 | |
7f57356b | 1658 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 1659 | if (full_path == NULL) { |
0f3bc09e | 1660 | rc = -ENOMEM; |
7ffec372 | 1661 | goto rmdir_exit; |
1da177e4 LT |
1662 | } |
1663 | ||
7ffec372 JL |
1664 | cifs_sb = CIFS_SB(inode->i_sb); |
1665 | tlink = cifs_sb_tlink(cifs_sb); | |
1666 | if (IS_ERR(tlink)) { | |
1667 | rc = PTR_ERR(tlink); | |
1668 | goto rmdir_exit; | |
1669 | } | |
f958ca5d PS |
1670 | tcon = tlink_tcon(tlink); |
1671 | server = tcon->ses->server; | |
1672 | ||
1673 | if (!server->ops->rmdir) { | |
1674 | rc = -ENOSYS; | |
1675 | cifs_put_tlink(tlink); | |
1676 | goto rmdir_exit; | |
1677 | } | |
7ffec372 | 1678 | |
f958ca5d | 1679 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1680 | cifs_put_tlink(tlink); |
1da177e4 LT |
1681 | |
1682 | if (!rc) { | |
2b0143b5 DH |
1683 | spin_lock(&d_inode(direntry)->i_lock); |
1684 | i_size_write(d_inode(direntry), 0); | |
1685 | clear_nlink(d_inode(direntry)); | |
1686 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1687 | } |
1688 | ||
2b0143b5 | 1689 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1690 | /* force revalidate to go get info when needed */ |
1691 | cifsInode->time = 0; | |
42c24544 SF |
1692 | |
1693 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1694 | /* |
1695 | * Force revalidate to get parent dir info when needed since cached | |
1696 | * attributes are invalid now. | |
1697 | */ | |
1698 | cifsInode->time = 0; | |
42c24544 | 1699 | |
2b0143b5 | 1700 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 1701 | current_time(inode); |
1da177e4 | 1702 | |
7ffec372 | 1703 | rmdir_exit: |
1da177e4 | 1704 | kfree(full_path); |
6d5786a3 | 1705 | free_xid(xid); |
1da177e4 LT |
1706 | return rc; |
1707 | } | |
1708 | ||
ee2fd967 | 1709 | static int |
8ceb9843 PS |
1710 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
1711 | const char *from_path, struct dentry *to_dentry, | |
1712 | const char *to_path) | |
ee2fd967 SF |
1713 | { |
1714 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 1715 | struct tcon_link *tlink; |
8ceb9843 PS |
1716 | struct cifs_tcon *tcon; |
1717 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
1718 | struct cifs_fid fid; |
1719 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
1720 | int oplock, rc; |
1721 | ||
7ffec372 JL |
1722 | tlink = cifs_sb_tlink(cifs_sb); |
1723 | if (IS_ERR(tlink)) | |
1724 | return PTR_ERR(tlink); | |
8ceb9843 PS |
1725 | tcon = tlink_tcon(tlink); |
1726 | server = tcon->ses->server; | |
1727 | ||
1728 | if (!server->ops->rename) | |
1729 | return -ENOSYS; | |
7ffec372 | 1730 | |
ee2fd967 | 1731 | /* try path-based rename first */ |
8ceb9843 | 1732 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
1733 | |
1734 | /* | |
8ceb9843 PS |
1735 | * Don't bother with rename by filehandle unless file is busy and |
1736 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
1737 | * rename by filehandle to various Windows servers. |
1738 | */ | |
47c78f4a | 1739 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 1740 | goto do_rename_exit; |
ee2fd967 | 1741 | |
ed0e3ace JL |
1742 | /* open-file renames don't work across directories */ |
1743 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 1744 | goto do_rename_exit; |
ed0e3ace | 1745 | |
d81b8a40 PS |
1746 | oparms.tcon = tcon; |
1747 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 1748 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 PS |
1749 | oparms.desired_access = DELETE; |
1750 | oparms.create_options = CREATE_NOT_DIR; | |
1751 | oparms.disposition = FILE_OPEN; | |
1752 | oparms.path = from_path; | |
1753 | oparms.fid = &fid; | |
1754 | oparms.reconnect = false; | |
1755 | ||
1756 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 1757 | if (rc == 0) { |
d81b8a40 | 1758 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 1759 | (const char *) to_dentry->d_name.name, |
2baa2682 | 1760 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 1761 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 1762 | } |
7ffec372 JL |
1763 | do_rename_exit: |
1764 | cifs_put_tlink(tlink); | |
ee2fd967 SF |
1765 | return rc; |
1766 | } | |
1767 | ||
8ceb9843 | 1768 | int |
7c33d597 MS |
1769 | cifs_rename2(struct inode *source_dir, struct dentry *source_dentry, |
1770 | struct inode *target_dir, struct dentry *target_dentry, | |
1771 | unsigned int flags) | |
1da177e4 | 1772 | { |
8ceb9843 PS |
1773 | char *from_name = NULL; |
1774 | char *to_name = NULL; | |
639e7a91 | 1775 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1776 | struct tcon_link *tlink; |
96daf2b0 | 1777 | struct cifs_tcon *tcon; |
ee2fd967 SF |
1778 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
1779 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
1780 | unsigned int xid; |
1781 | int rc, tmprc; | |
1da177e4 | 1782 | |
7c33d597 MS |
1783 | if (flags & ~RENAME_NOREPLACE) |
1784 | return -EINVAL; | |
1785 | ||
639e7a91 | 1786 | cifs_sb = CIFS_SB(source_dir->i_sb); |
7ffec372 JL |
1787 | tlink = cifs_sb_tlink(cifs_sb); |
1788 | if (IS_ERR(tlink)) | |
1789 | return PTR_ERR(tlink); | |
1790 | tcon = tlink_tcon(tlink); | |
1da177e4 | 1791 | |
6d5786a3 | 1792 | xid = get_xid(); |
ee2fd967 | 1793 | |
ee2fd967 SF |
1794 | /* |
1795 | * we already have the rename sem so we do not need to | |
1796 | * grab it again here to protect the path integrity | |
1797 | */ | |
8ceb9843 PS |
1798 | from_name = build_path_from_dentry(source_dentry); |
1799 | if (from_name == NULL) { | |
ee2fd967 SF |
1800 | rc = -ENOMEM; |
1801 | goto cifs_rename_exit; | |
1802 | } | |
1803 | ||
8ceb9843 PS |
1804 | to_name = build_path_from_dentry(target_dentry); |
1805 | if (to_name == NULL) { | |
1da177e4 LT |
1806 | rc = -ENOMEM; |
1807 | goto cifs_rename_exit; | |
1808 | } | |
1809 | ||
8ceb9843 PS |
1810 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
1811 | to_name); | |
ee2fd967 | 1812 | |
7c33d597 MS |
1813 | /* |
1814 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
1815 | */ | |
1816 | if (flags & RENAME_NOREPLACE) | |
1817 | goto cifs_rename_exit; | |
1818 | ||
14121bdc JL |
1819 | if (rc == -EEXIST && tcon->unix_ext) { |
1820 | /* | |
8ceb9843 PS |
1821 | * Are src and dst hardlinks of same inode? We can only tell |
1822 | * with unix extensions enabled. | |
14121bdc JL |
1823 | */ |
1824 | info_buf_source = | |
6da2ec56 | 1825 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
14121bdc JL |
1826 | GFP_KERNEL); |
1827 | if (info_buf_source == NULL) { | |
1828 | rc = -ENOMEM; | |
1829 | goto cifs_rename_exit; | |
1830 | } | |
1831 | ||
1832 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
1833 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
1834 | info_buf_source, | |
1835 | cifs_sb->local_nls, | |
2baa2682 | 1836 | cifs_remap(cifs_sb)); |
8d281efb | 1837 | if (tmprc != 0) |
14121bdc | 1838 | goto unlink_target; |
ee2fd967 | 1839 | |
8ceb9843 PS |
1840 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
1841 | info_buf_target, | |
1842 | cifs_sb->local_nls, | |
2baa2682 | 1843 | cifs_remap(cifs_sb)); |
14121bdc | 1844 | |
8d281efb | 1845 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 1846 | info_buf_target->UniqueId)) { |
14121bdc | 1847 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 1848 | rc = 0; |
14121bdc | 1849 | goto cifs_rename_exit; |
ae6884a9 | 1850 | } |
8ceb9843 PS |
1851 | } |
1852 | /* | |
1853 | * else ... BB we could add the same check for Windows by | |
1854 | * checking the UniqueId via FILE_INTERNAL_INFO | |
1855 | */ | |
14121bdc | 1856 | |
ee2fd967 | 1857 | unlink_target: |
fc6f3943 | 1858 | /* Try unlinking the target dentry if it's not negative */ |
2b0143b5 | 1859 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { |
a07d3220 PS |
1860 | if (d_is_dir(target_dentry)) |
1861 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
1862 | else | |
1863 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
1864 | if (tmprc) |
1865 | goto cifs_rename_exit; | |
8ceb9843 PS |
1866 | rc = cifs_do_rename(xid, source_dentry, from_name, |
1867 | target_dentry, to_name); | |
1da177e4 LT |
1868 | } |
1869 | ||
b46799a8 PS |
1870 | /* force revalidate to go get info when needed */ |
1871 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
1872 | ||
1873 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 1874 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 1875 | |
1da177e4 | 1876 | cifs_rename_exit: |
ee2fd967 | 1877 | kfree(info_buf_source); |
8ceb9843 PS |
1878 | kfree(from_name); |
1879 | kfree(to_name); | |
6d5786a3 | 1880 | free_xid(xid); |
7ffec372 | 1881 | cifs_put_tlink(tlink); |
1da177e4 LT |
1882 | return rc; |
1883 | } | |
1884 | ||
df2cf170 JL |
1885 | static bool |
1886 | cifs_inode_needs_reval(struct inode *inode) | |
1da177e4 | 1887 | { |
df2cf170 | 1888 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 1889 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
1da177e4 | 1890 | |
57c55cd7 RS |
1891 | if (cifs_i->time == 0) |
1892 | return true; | |
1893 | ||
18cceb6a | 1894 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 1895 | return false; |
1da177e4 | 1896 | |
df2cf170 JL |
1897 | if (!lookupCacheEnabled) |
1898 | return true; | |
1da177e4 | 1899 | |
a87c9ad9 JL |
1900 | if (!cifs_sb->actimeo) |
1901 | return true; | |
1902 | ||
6d20e840 SJ |
1903 | if (!time_in_range(jiffies, cifs_i->time, |
1904 | cifs_i->time + cifs_sb->actimeo)) | |
df2cf170 JL |
1905 | return true; |
1906 | ||
db19272e | 1907 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 1908 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
1909 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
1910 | return true; | |
1911 | ||
df2cf170 JL |
1912 | return false; |
1913 | } | |
1914 | ||
523fb8c8 SJ |
1915 | /* |
1916 | * Zap the cache. Called when invalid_mapping flag is set. | |
1917 | */ | |
6feb9891 | 1918 | int |
df2cf170 JL |
1919 | cifs_invalidate_mapping(struct inode *inode) |
1920 | { | |
6feb9891 | 1921 | int rc = 0; |
df2cf170 | 1922 | |
df2cf170 | 1923 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 1924 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 1925 | if (rc) |
f96637be JP |
1926 | cifs_dbg(VFS, "%s: could not invalidate inode %p\n", |
1927 | __func__, inode); | |
df2cf170 | 1928 | } |
257fb1f1 | 1929 | |
9451a9a5 | 1930 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 1931 | return rc; |
df2cf170 JL |
1932 | } |
1933 | ||
4f73c7d3 JL |
1934 | /** |
1935 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
1936 | * @word: long word containing the bit lock | |
1937 | */ | |
1938 | static int | |
dfd01f02 | 1939 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 1940 | { |
4f73c7d3 | 1941 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
1942 | if (signal_pending_state(mode, current)) |
1943 | return -ERESTARTSYS; | |
4f73c7d3 JL |
1944 | return 0; |
1945 | } | |
1946 | ||
e284e53f JL |
1947 | int |
1948 | cifs_revalidate_mapping(struct inode *inode) | |
1949 | { | |
4f73c7d3 JL |
1950 | int rc; |
1951 | unsigned long *flags = &CIFS_I(inode)->flags; | |
1952 | ||
74316201 N |
1953 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
1954 | TASK_KILLABLE); | |
4f73c7d3 JL |
1955 | if (rc) |
1956 | return rc; | |
1957 | ||
1958 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
1959 | rc = cifs_invalidate_mapping(inode); | |
1960 | if (rc) | |
1961 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
1962 | } | |
1963 | ||
1964 | clear_bit_unlock(CIFS_INO_LOCK, flags); | |
b1cce803 | 1965 | smp_mb__after_atomic(); |
4f73c7d3 JL |
1966 | wake_up_bit(flags, CIFS_INO_LOCK); |
1967 | ||
1968 | return rc; | |
1969 | } | |
1970 | ||
1971 | int | |
1972 | cifs_zap_mapping(struct inode *inode) | |
1973 | { | |
1974 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
1975 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
1976 | } |
1977 | ||
6feb9891 | 1978 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
1979 | { |
1980 | int rc = 0; | |
496ad9aa | 1981 | struct inode *inode = file_inode(filp); |
ba00ba64 | 1982 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d JL |
1983 | |
1984 | if (!cifs_inode_needs_reval(inode)) | |
6feb9891 | 1985 | return rc; |
abab095d | 1986 | |
13cfb733 | 1987 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
1988 | rc = cifs_get_file_info_unix(filp); |
1989 | else | |
1990 | rc = cifs_get_file_info(filp); | |
1991 | ||
abab095d JL |
1992 | return rc; |
1993 | } | |
1994 | ||
6feb9891 | 1995 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 1996 | { |
6d5786a3 | 1997 | unsigned int xid; |
df2cf170 | 1998 | int rc = 0; |
2b0143b5 | 1999 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2000 | struct super_block *sb = dentry->d_sb; |
6feb9891 | 2001 | char *full_path = NULL; |
df2cf170 JL |
2002 | |
2003 | if (inode == NULL) | |
2004 | return -ENOENT; | |
1da177e4 | 2005 | |
df2cf170 | 2006 | if (!cifs_inode_needs_reval(inode)) |
6feb9891 PS |
2007 | return rc; |
2008 | ||
6d5786a3 | 2009 | xid = get_xid(); |
1da177e4 LT |
2010 | |
2011 | /* can not safely grab the rename sem here if rename calls revalidate | |
2012 | since that would deadlock */ | |
df2cf170 | 2013 | full_path = build_path_from_dentry(dentry); |
1da177e4 | 2014 | if (full_path == NULL) { |
0f3bc09e | 2015 | rc = -ENOMEM; |
6feb9891 | 2016 | goto out; |
1da177e4 LT |
2017 | } |
2018 | ||
f96637be JP |
2019 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2020 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2021 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2022 | |
0d424ad0 | 2023 | if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) |
df2cf170 JL |
2024 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2025 | else | |
2026 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2027 | xid, NULL); | |
1da177e4 | 2028 | |
6feb9891 | 2029 | out: |
1da177e4 | 2030 | kfree(full_path); |
6d5786a3 | 2031 | free_xid(xid); |
1da177e4 LT |
2032 | return rc; |
2033 | } | |
2034 | ||
6feb9891 PS |
2035 | int cifs_revalidate_file(struct file *filp) |
2036 | { | |
2037 | int rc; | |
496ad9aa | 2038 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2039 | |
2040 | rc = cifs_revalidate_file_attr(filp); | |
2041 | if (rc) | |
2042 | return rc; | |
2043 | ||
e284e53f | 2044 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2045 | } |
2046 | ||
2047 | /* revalidate a dentry's inode attributes */ | |
2048 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2049 | { | |
2050 | int rc; | |
2b0143b5 | 2051 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2052 | |
2053 | rc = cifs_revalidate_dentry_attr(dentry); | |
2054 | if (rc) | |
2055 | return rc; | |
2056 | ||
e284e53f | 2057 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2058 | } |
2059 | ||
a528d35e DH |
2060 | int cifs_getattr(const struct path *path, struct kstat *stat, |
2061 | u32 request_mask, unsigned int flags) | |
1da177e4 | 2062 | { |
a528d35e | 2063 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2064 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2065 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2066 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2067 | int rc; |
3aa1c8c2 | 2068 | |
6feb9891 PS |
2069 | /* |
2070 | * We need to be sure that all dirty pages are written and the server | |
2071 | * has actual ctime, mtime and file length. | |
2072 | */ | |
18cceb6a | 2073 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
6feb9891 PS |
2074 | inode->i_mapping->nrpages != 0) { |
2075 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
2076 | if (rc) { |
2077 | mapping_set_error(inode->i_mapping, rc); | |
2078 | return rc; | |
2079 | } | |
6feb9891 | 2080 | } |
1c456013 | 2081 | |
6feb9891 PS |
2082 | rc = cifs_revalidate_dentry_attr(dentry); |
2083 | if (rc) | |
2084 | return rc; | |
2085 | ||
2086 | generic_fillattr(inode, stat); | |
2087 | stat->blksize = CIFS_MAX_MSGSIZE; | |
2088 | stat->ino = CIFS_I(inode)->uniqueid; | |
2089 | ||
6e70e26d SF |
2090 | /* old CIFS Unix Extensions doesn't return create time */ |
2091 | if (CIFS_I(inode)->createtime) { | |
2092 | stat->result_mask |= STATX_BTIME; | |
95390201 AB |
2093 | stat->btime = |
2094 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
6e70e26d SF |
2095 | } |
2096 | ||
2097 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2098 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2099 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2100 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2101 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2102 | ||
6feb9891 | 2103 | /* |
d3d1fce1 JL |
2104 | * If on a multiuser mount without unix extensions or cifsacl being |
2105 | * enabled, and the admin hasn't overridden them, set the ownership | |
2106 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2107 | */ |
2108 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2109 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2110 | !tcon->unix_ext) { |
2111 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2112 | stat->uid = current_fsuid(); | |
2113 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2114 | stat->gid = current_fsgid(); | |
5fe14c85 | 2115 | } |
6feb9891 | 2116 | return rc; |
1da177e4 LT |
2117 | } |
2118 | ||
2119 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) | |
2120 | { | |
09cbfeaf KS |
2121 | pgoff_t index = from >> PAGE_SHIFT; |
2122 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2123 | struct page *page; |
1da177e4 LT |
2124 | int rc = 0; |
2125 | ||
2126 | page = grab_cache_page(mapping, index); | |
2127 | if (!page) | |
2128 | return -ENOMEM; | |
2129 | ||
09cbfeaf | 2130 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2131 | unlock_page(page); |
09cbfeaf | 2132 | put_page(page); |
1da177e4 LT |
2133 | return rc; |
2134 | } | |
2135 | ||
1b947463 | 2136 | static void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2137 | { |
57c55cd7 RS |
2138 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
2139 | ||
ba6a46a0 | 2140 | spin_lock(&inode->i_lock); |
3677db10 | 2141 | i_size_write(inode, offset); |
ba6a46a0 | 2142 | spin_unlock(&inode->i_lock); |
1b947463 | 2143 | |
57c55cd7 RS |
2144 | /* Cached inode must be refreshed on truncate */ |
2145 | cifs_i->time = 0; | |
7caef267 | 2146 | truncate_pagecache(inode, offset); |
3677db10 SF |
2147 | } |
2148 | ||
8efdbde6 JL |
2149 | static int |
2150 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
6d5786a3 | 2151 | unsigned int xid, char *full_path) |
8efdbde6 JL |
2152 | { |
2153 | int rc; | |
2154 | struct cifsFileInfo *open_file; | |
2155 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2156 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2157 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2158 | struct cifs_tcon *tcon = NULL; |
2159 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2160 | |
2161 | /* | |
2162 | * To avoid spurious oplock breaks from server, in the case of | |
2163 | * inodes that we already have open, avoid doing path based | |
2164 | * setting of file size if we can do it by handle. | |
2165 | * This keeps our caching token (oplock) and avoids timeouts | |
2166 | * when the local oplock break takes longer to flush | |
2167 | * writebehind data than the SMB timeout for the SetPathInfo | |
2168 | * request would allow | |
2169 | */ | |
6508d904 | 2170 | open_file = find_writable_file(cifsInode, true); |
8efdbde6 | 2171 | if (open_file) { |
d1433418 PS |
2172 | tcon = tlink_tcon(open_file->tlink); |
2173 | server = tcon->ses->server; | |
2174 | if (server->ops->set_file_size) | |
2175 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2176 | attrs->ia_size, false); | |
2177 | else | |
2178 | rc = -ENOSYS; | |
6ab409b5 | 2179 | cifsFileInfo_put(open_file); |
f96637be | 2180 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2181 | } else |
2182 | rc = -EINVAL; | |
2183 | ||
d1433418 PS |
2184 | if (!rc) |
2185 | goto set_size_out; | |
2186 | ||
2187 | if (tcon == NULL) { | |
2188 | tlink = cifs_sb_tlink(cifs_sb); | |
2189 | if (IS_ERR(tlink)) | |
2190 | return PTR_ERR(tlink); | |
2191 | tcon = tlink_tcon(tlink); | |
2192 | server = tcon->ses->server; | |
2193 | } | |
ba00ba64 | 2194 | |
d1433418 PS |
2195 | /* |
2196 | * Set file size by pathname rather than by handle either because no | |
2197 | * valid, writeable file handle for it was found or because there was | |
2198 | * an error setting it by handle. | |
2199 | */ | |
2200 | if (server->ops->set_path_size) | |
2201 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2202 | attrs->ia_size, cifs_sb, false); | |
2203 | else | |
2204 | rc = -ENOSYS; | |
f96637be | 2205 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2206 | |
d1433418 PS |
2207 | if (tlink) |
2208 | cifs_put_tlink(tlink); | |
8efdbde6 | 2209 | |
d1433418 | 2210 | set_size_out: |
8efdbde6 | 2211 | if (rc == 0) { |
fbec9ab9 | 2212 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2213 | cifs_setsize(inode, attrs->ia_size); |
8efdbde6 JL |
2214 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2215 | } | |
2216 | ||
2217 | return rc; | |
2218 | } | |
2219 | ||
3fe5c1dd JL |
2220 | static int |
2221 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2222 | { | |
2223 | int rc; | |
6d5786a3 | 2224 | unsigned int xid; |
3fe5c1dd | 2225 | char *full_path = NULL; |
2b0143b5 | 2226 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2227 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2228 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2229 | struct tcon_link *tlink; |
96daf2b0 | 2230 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2231 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2232 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2233 | |
35c265e0 AV |
2234 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2235 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2236 | |
6d5786a3 | 2237 | xid = get_xid(); |
3fe5c1dd | 2238 | |
db78b877 CH |
2239 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2240 | attrs->ia_valid |= ATTR_FORCE; | |
2241 | ||
31051c85 | 2242 | rc = setattr_prepare(direntry, attrs); |
db78b877 CH |
2243 | if (rc < 0) |
2244 | goto out; | |
3fe5c1dd JL |
2245 | |
2246 | full_path = build_path_from_dentry(direntry); | |
2247 | if (full_path == NULL) { | |
2248 | rc = -ENOMEM; | |
2249 | goto out; | |
2250 | } | |
2251 | ||
0f4d634c JL |
2252 | /* |
2253 | * Attempt to flush data before changing attributes. We need to do | |
2254 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2255 | * ownership or mode then we may also need to do this. Here, we take | |
2256 | * the safe way out and just do the flush on all setattr requests. If | |
2257 | * the flush returns error, store it to report later and continue. | |
2258 | * | |
2259 | * BB: This should be smarter. Why bother flushing pages that | |
2260 | * will be truncated anyway? Also, should we error out here if | |
2261 | * the flush returns error? | |
2262 | */ | |
2263 | rc = filemap_write_and_wait(inode->i_mapping); | |
eb4b756b JL |
2264 | mapping_set_error(inode->i_mapping, rc); |
2265 | rc = 0; | |
3fe5c1dd JL |
2266 | |
2267 | if (attrs->ia_valid & ATTR_SIZE) { | |
2268 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2269 | if (rc != 0) | |
2270 | goto out; | |
2271 | } | |
2272 | ||
2273 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2274 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2275 | attrs->ia_valid &= ~ATTR_MODE; | |
2276 | ||
2277 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2278 | if (args == NULL) { | |
2279 | rc = -ENOMEM; | |
2280 | goto out; | |
2281 | } | |
2282 | ||
2283 | /* set up the struct */ | |
2284 | if (attrs->ia_valid & ATTR_MODE) | |
2285 | args->mode = attrs->ia_mode; | |
2286 | else | |
2287 | args->mode = NO_CHANGE_64; | |
2288 | ||
2289 | if (attrs->ia_valid & ATTR_UID) | |
2290 | args->uid = attrs->ia_uid; | |
2291 | else | |
49418b2c | 2292 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2293 | |
2294 | if (attrs->ia_valid & ATTR_GID) | |
2295 | args->gid = attrs->ia_gid; | |
2296 | else | |
49418b2c | 2297 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2298 | |
2299 | if (attrs->ia_valid & ATTR_ATIME) | |
95390201 | 2300 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
3fe5c1dd JL |
2301 | else |
2302 | args->atime = NO_CHANGE_64; | |
2303 | ||
2304 | if (attrs->ia_valid & ATTR_MTIME) | |
95390201 | 2305 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
3fe5c1dd JL |
2306 | else |
2307 | args->mtime = NO_CHANGE_64; | |
2308 | ||
2309 | if (attrs->ia_valid & ATTR_CTIME) | |
95390201 | 2310 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
3fe5c1dd JL |
2311 | else |
2312 | args->ctime = NO_CHANGE_64; | |
2313 | ||
2314 | args->device = 0; | |
6508d904 | 2315 | open_file = find_writable_file(cifsInode, true); |
3bbeeb3c | 2316 | if (open_file) { |
4b4de76e | 2317 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2318 | u32 npid = open_file->pid; |
13cfb733 | 2319 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2320 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2321 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2322 | } else { |
7ffec372 JL |
2323 | tlink = cifs_sb_tlink(cifs_sb); |
2324 | if (IS_ERR(tlink)) { | |
2325 | rc = PTR_ERR(tlink); | |
2326 | goto out; | |
2327 | } | |
2328 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2329 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2330 | cifs_sb->local_nls, |
bc8ebdc4 | 2331 | cifs_remap(cifs_sb)); |
7ffec372 | 2332 | cifs_put_tlink(tlink); |
3bbeeb3c | 2333 | } |
3fe5c1dd | 2334 | |
1025774c CH |
2335 | if (rc) |
2336 | goto out; | |
ccd4bb1b | 2337 | |
1025774c | 2338 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2339 | attrs->ia_size != i_size_read(inode)) |
2340 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2341 | |
2342 | setattr_copy(inode, attrs); | |
2343 | mark_inode_dirty(inode); | |
2344 | ||
2345 | /* force revalidate when any of these times are set since some | |
2346 | of the fs types (eg ext3, fat) do not have fine enough | |
2347 | time granularity to match protocol, and we do not have a | |
2348 | a way (yet) to query the server fs's time granularity (and | |
2349 | whether it rounds times down). | |
2350 | */ | |
2351 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2352 | cifsInode->time = 0; | |
3fe5c1dd JL |
2353 | out: |
2354 | kfree(args); | |
2355 | kfree(full_path); | |
6d5786a3 | 2356 | free_xid(xid); |
3fe5c1dd JL |
2357 | return rc; |
2358 | } | |
2359 | ||
0510eeb7 JL |
2360 | static int |
2361 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2362 | { |
6d5786a3 | 2363 | unsigned int xid; |
8abf2775 EB |
2364 | kuid_t uid = INVALID_UID; |
2365 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2366 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2367 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2368 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1da177e4 LT |
2369 | char *full_path = NULL; |
2370 | int rc = -EACCES; | |
feb3e20c | 2371 | __u32 dosattr = 0; |
4e1e7fb9 | 2372 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2373 | |
6d5786a3 | 2374 | xid = get_xid(); |
1da177e4 | 2375 | |
35c265e0 AV |
2376 | cifs_dbg(FYI, "setattr on file %pd attrs->iavalid 0x%x\n", |
2377 | direntry, attrs->ia_valid); | |
6473a559 | 2378 | |
db78b877 CH |
2379 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2380 | attrs->ia_valid |= ATTR_FORCE; | |
2381 | ||
31051c85 | 2382 | rc = setattr_prepare(direntry, attrs); |
db78b877 | 2383 | if (rc < 0) { |
6d5786a3 | 2384 | free_xid(xid); |
db78b877 | 2385 | return rc; |
6473a559 | 2386 | } |
50c2f753 | 2387 | |
7f57356b | 2388 | full_path = build_path_from_dentry(direntry); |
1da177e4 | 2389 | if (full_path == NULL) { |
0f3bc09e | 2390 | rc = -ENOMEM; |
6d5786a3 | 2391 | free_xid(xid); |
0f3bc09e | 2392 | return rc; |
1da177e4 | 2393 | } |
1da177e4 | 2394 | |
0f4d634c JL |
2395 | /* |
2396 | * Attempt to flush data before changing attributes. We need to do | |
2397 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2398 | * ownership or mode then we may also need to do this. Here, we take | |
2399 | * the safe way out and just do the flush on all setattr requests. If | |
2400 | * the flush returns error, store it to report later and continue. | |
2401 | * | |
2402 | * BB: This should be smarter. Why bother flushing pages that | |
2403 | * will be truncated anyway? Also, should we error out here if | |
2404 | * the flush returns error? | |
2405 | */ | |
2406 | rc = filemap_write_and_wait(inode->i_mapping); | |
eb4b756b JL |
2407 | mapping_set_error(inode->i_mapping, rc); |
2408 | rc = 0; | |
cea21805 | 2409 | |
50531444 | 2410 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2411 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2412 | if (rc != 0) | |
e30dcf3a | 2413 | goto cifs_setattr_exit; |
1da177e4 | 2414 | } |
4ca691a8 | 2415 | |
a5ff3769 SP |
2416 | if (attrs->ia_valid & ATTR_UID) |
2417 | uid = attrs->ia_uid; | |
2418 | ||
2419 | if (attrs->ia_valid & ATTR_GID) | |
2420 | gid = attrs->ia_gid; | |
2421 | ||
2422 | #ifdef CONFIG_CIFS_ACL | |
2423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
8abf2775 | 2424 | if (uid_valid(uid) || gid_valid(gid)) { |
a5ff3769 SP |
2425 | rc = id_mode_to_cifs_acl(inode, full_path, NO_CHANGE_64, |
2426 | uid, gid); | |
2427 | if (rc) { | |
f96637be JP |
2428 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2429 | __func__, rc); | |
a5ff3769 SP |
2430 | goto cifs_setattr_exit; |
2431 | } | |
2432 | } | |
2433 | } else | |
2434 | #endif /* CONFIG_CIFS_ACL */ | |
3fe5c1dd | 2435 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2436 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2437 | |
d32c4f26 JL |
2438 | /* skip mode change if it's just for clearing setuid/setgid */ |
2439 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2440 | attrs->ia_valid &= ~ATTR_MODE; | |
2441 | ||
1da177e4 | 2442 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2443 | mode = attrs->ia_mode; |
cdbce9c8 | 2444 | rc = 0; |
79df1bae | 2445 | #ifdef CONFIG_CIFS_ACL |
78415d2d | 2446 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
a5ff3769 | 2447 | rc = id_mode_to_cifs_acl(inode, full_path, mode, |
8abf2775 | 2448 | INVALID_UID, INVALID_GID); |
78415d2d | 2449 | if (rc) { |
f96637be JP |
2450 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2451 | __func__, rc); | |
78415d2d SP |
2452 | goto cifs_setattr_exit; |
2453 | } | |
2454 | } else | |
79df1bae | 2455 | #endif /* CONFIG_CIFS_ACL */ |
5132861a JL |
2456 | if (((mode & S_IWUGO) == 0) && |
2457 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2458 | |
2459 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2460 | ||
5132861a JL |
2461 | /* fix up mode if we're not using dynperm */ |
2462 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2463 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2464 | } else if ((mode & S_IWUGO) && | |
2465 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2466 | |
2467 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2468 | /* Attributes of 0 are ignored */ | |
2469 | if (dosattr == 0) | |
2470 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2471 | |
2472 | /* reset local inode permissions to normal */ | |
2473 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2474 | attrs->ia_mode &= ~(S_IALLUGO); | |
2475 | if (S_ISDIR(inode->i_mode)) | |
2476 | attrs->ia_mode |= | |
2477 | cifs_sb->mnt_dir_mode; | |
2478 | else | |
2479 | attrs->ia_mode |= | |
2480 | cifs_sb->mnt_file_mode; | |
2481 | } | |
2482 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2483 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2484 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2485 | } |
1da177e4 LT |
2486 | } |
2487 | ||
feb3e20c JL |
2488 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2489 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2490 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2491 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2492 | |
e30dcf3a SF |
2493 | /* Even if error on time set, no sense failing the call if |
2494 | the server would set the time to a reasonable value anyway, | |
2495 | and this check ensures that we are not being called from | |
2496 | sys_utimes in which case we ought to fail the call back to | |
2497 | the user when the server rejects the call */ | |
fb8c4b14 | 2498 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2499 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2500 | rc = 0; |
1da177e4 LT |
2501 | } |
2502 | ||
2503 | /* do not need local check to inode_check_ok since the server does | |
2504 | that */ | |
1025774c CH |
2505 | if (rc) |
2506 | goto cifs_setattr_exit; | |
2507 | ||
2508 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2509 | attrs->ia_size != i_size_read(inode)) |
2510 | truncate_setsize(inode, attrs->ia_size); | |
1025774c CH |
2511 | |
2512 | setattr_copy(inode, attrs); | |
2513 | mark_inode_dirty(inode); | |
1025774c | 2514 | |
e30dcf3a | 2515 | cifs_setattr_exit: |
1da177e4 | 2516 | kfree(full_path); |
6d5786a3 | 2517 | free_xid(xid); |
1da177e4 LT |
2518 | return rc; |
2519 | } | |
2520 | ||
0510eeb7 JL |
2521 | int |
2522 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) | |
2523 | { | |
fc64005c | 2524 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2525 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
0510eeb7 JL |
2526 | |
2527 | if (pTcon->unix_ext) | |
2528 | return cifs_setattr_unix(direntry, attrs); | |
2529 | ||
2530 | return cifs_setattr_nounix(direntry, attrs); | |
2531 | ||
2532 | /* BB: add cifs_setattr_legacy for really old servers */ | |
2533 | } | |
2534 | ||
99ee4dbd | 2535 | #if 0 |
1da177e4 LT |
2536 | void cifs_delete_inode(struct inode *inode) |
2537 | { | |
f96637be | 2538 | cifs_dbg(FYI, "In cifs_delete_inode, inode = 0x%p\n", inode); |
1da177e4 LT |
2539 | /* may have to add back in if and when safe distributed caching of |
2540 | directories added e.g. via FindNotify */ | |
2541 | } | |
99ee4dbd | 2542 | #endif |