Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/inode.c | |
3 | * | |
f19159dc | 4 | * Copyright (C) International Business Machines Corp., 2002,2010 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/fs.h> | |
1da177e4 | 22 | #include <linux/stat.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
1da177e4 | 24 | #include <linux/pagemap.h> |
4f73c7d3 | 25 | #include <linux/freezer.h> |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
5dd43ce2 | 27 | #include <linux/wait_bit.h> |
10c5db28 | 28 | #include <linux/fiemap.h> |
174cd4b1 | 29 | |
1da177e4 LT |
30 | #include <asm/div64.h> |
31 | #include "cifsfs.h" | |
32 | #include "cifspdu.h" | |
33 | #include "cifsglob.h" | |
34 | #include "cifsproto.h" | |
6a5f6592 | 35 | #include "smb2proto.h" |
1da177e4 LT |
36 | #include "cifs_debug.h" |
37 | #include "cifs_fs_sb.h" | |
2baa2682 | 38 | #include "cifs_unicode.h" |
9451a9a5 | 39 | #include "fscache.h" |
8401e936 | 40 | #include "fs_context.h" |
1da177e4 | 41 | |
70eff55d | 42 | |
01c64fea | 43 | static void cifs_set_ops(struct inode *inode) |
70eff55d CH |
44 | { |
45 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
46 | ||
47 | switch (inode->i_mode & S_IFMT) { | |
48 | case S_IFREG: | |
49 | inode->i_op = &cifs_file_inode_ops; | |
50 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { | |
51 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
52 | inode->i_fop = &cifs_file_direct_nobrl_ops; | |
53 | else | |
54 | inode->i_fop = &cifs_file_direct_ops; | |
8be7e6ba PS |
55 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { |
56 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
57 | inode->i_fop = &cifs_file_strict_nobrl_ops; | |
58 | else | |
59 | inode->i_fop = &cifs_file_strict_ops; | |
70eff55d CH |
60 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
61 | inode->i_fop = &cifs_file_nobrl_ops; | |
62 | else { /* not direct, send byte range locks */ | |
63 | inode->i_fop = &cifs_file_ops; | |
64 | } | |
65 | ||
70eff55d | 66 | /* check if server can support readpages */ |
1f641d94 | 67 | if (cifs_sb_master_tcon(cifs_sb)->ses->server->max_read < |
09cbfeaf | 68 | PAGE_SIZE + MAX_CIFS_HDR_SIZE) |
70eff55d CH |
69 | inode->i_data.a_ops = &cifs_addr_ops_smallbuf; |
70 | else | |
71 | inode->i_data.a_ops = &cifs_addr_ops; | |
72 | break; | |
73 | case S_IFDIR: | |
bc5b6e24 | 74 | #ifdef CONFIG_CIFS_DFS_UPCALL |
01c64fea | 75 | if (IS_AUTOMOUNT(inode)) { |
7962670e IM |
76 | inode->i_op = &cifs_dfs_referral_inode_operations; |
77 | } else { | |
bc5b6e24 SF |
78 | #else /* NO DFS support, treat as a directory */ |
79 | { | |
80 | #endif | |
7962670e IM |
81 | inode->i_op = &cifs_dir_inode_ops; |
82 | inode->i_fop = &cifs_dir_ops; | |
83 | } | |
70eff55d CH |
84 | break; |
85 | case S_IFLNK: | |
86 | inode->i_op = &cifs_symlink_inode_ops; | |
87 | break; | |
88 | default: | |
89 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
90 | break; | |
91 | } | |
92 | } | |
93 | ||
df2cf170 JL |
94 | /* check inode attributes against fattr. If they don't match, tag the |
95 | * inode for cache invalidation | |
96 | */ | |
97 | static void | |
98 | cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr) | |
99 | { | |
100 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
101 | ||
f96637be JP |
102 | cifs_dbg(FYI, "%s: revalidating inode %llu\n", |
103 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
104 | |
105 | if (inode->i_state & I_NEW) { | |
f96637be JP |
106 | cifs_dbg(FYI, "%s: inode %llu is new\n", |
107 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
108 | return; |
109 | } | |
110 | ||
111 | /* don't bother with revalidation if we have an oplock */ | |
18cceb6a | 112 | if (CIFS_CACHE_READ(cifs_i)) { |
f96637be JP |
113 | cifs_dbg(FYI, "%s: inode %llu is oplocked\n", |
114 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
115 | return; |
116 | } | |
117 | ||
118 | /* revalidate if mtime or size have changed */ | |
918c9009 | 119 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
95390201 | 120 | if (timespec64_equal(&inode->i_mtime, &fattr->cf_mtime) && |
df2cf170 | 121 | cifs_i->server_eof == fattr->cf_eof) { |
f96637be JP |
122 | cifs_dbg(FYI, "%s: inode %llu is unchanged\n", |
123 | __func__, cifs_i->uniqueid); | |
df2cf170 JL |
124 | return; |
125 | } | |
126 | ||
f96637be JP |
127 | cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n", |
128 | __func__, cifs_i->uniqueid); | |
aff8d5ca | 129 | set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags); |
df2cf170 JL |
130 | } |
131 | ||
74d290da JM |
132 | /* |
133 | * copy nlink to the inode, unless it wasn't provided. Provide | |
134 | * sane values if we don't have an existing one and none was provided | |
135 | */ | |
136 | static void | |
137 | cifs_nlink_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
138 | { | |
139 | /* | |
140 | * if we're in a situation where we can't trust what we | |
141 | * got from the server (readdir, some non-unix cases) | |
142 | * fake reasonable values | |
143 | */ | |
144 | if (fattr->cf_flags & CIFS_FATTR_UNKNOWN_NLINK) { | |
145 | /* only provide fake values on a new inode */ | |
146 | if (inode->i_state & I_NEW) { | |
147 | if (fattr->cf_cifsattrs & ATTR_DIRECTORY) | |
148 | set_nlink(inode, 2); | |
149 | else | |
150 | set_nlink(inode, 1); | |
151 | } | |
152 | return; | |
153 | } | |
154 | ||
155 | /* we trust the server, so update it */ | |
156 | set_nlink(inode, fattr->cf_nlink); | |
157 | } | |
158 | ||
cc0bad75 JL |
159 | /* populate an inode with info from a cifs_fattr struct */ |
160 | void | |
161 | cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr) | |
75f12983 | 162 | { |
cc0bad75 | 163 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
0b8f18e3 | 164 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
cc0bad75 | 165 | |
df2cf170 JL |
166 | cifs_revalidate_cache(inode, fattr); |
167 | ||
b7ca6928 | 168 | spin_lock(&inode->i_lock); |
918c9009 DD |
169 | fattr->cf_mtime = timestamp_truncate(fattr->cf_mtime, inode); |
170 | fattr->cf_atime = timestamp_truncate(fattr->cf_atime, inode); | |
171 | fattr->cf_ctime = timestamp_truncate(fattr->cf_ctime, inode); | |
9b9c5bea | 172 | /* we do not want atime to be less than mtime, it broke some apps */ |
69738cfd | 173 | if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0) |
9b9c5bea SF |
174 | inode->i_atime = fattr->cf_mtime; |
175 | else | |
176 | inode->i_atime = fattr->cf_atime; | |
95390201 AB |
177 | inode->i_mtime = fattr->cf_mtime; |
178 | inode->i_ctime = fattr->cf_ctime; | |
cc0bad75 | 179 | inode->i_rdev = fattr->cf_rdev; |
74d290da | 180 | cifs_nlink_fattr_to_inode(inode, fattr); |
cc0bad75 JL |
181 | inode->i_uid = fattr->cf_uid; |
182 | inode->i_gid = fattr->cf_gid; | |
183 | ||
0b8f18e3 JL |
184 | /* if dynperm is set, don't clobber existing mode */ |
185 | if (inode->i_state & I_NEW || | |
186 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) | |
187 | inode->i_mode = fattr->cf_mode; | |
188 | ||
cc0bad75 | 189 | cifs_i->cifsAttrs = fattr->cf_cifsattrs; |
75f12983 | 190 | |
0b8f18e3 JL |
191 | if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL) |
192 | cifs_i->time = 0; | |
193 | else | |
194 | cifs_i->time = jiffies; | |
195 | ||
aff8d5ca JL |
196 | if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING) |
197 | set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
198 | else | |
199 | clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags); | |
cc0bad75 | 200 | |
835a36ca | 201 | cifs_i->server_eof = fattr->cf_eof; |
cc0bad75 JL |
202 | /* |
203 | * Can't safely change the file size here if the client is writing to | |
204 | * it due to potential races. | |
205 | */ | |
cc0bad75 JL |
206 | if (is_size_safe_to_change(cifs_i, fattr->cf_eof)) { |
207 | i_size_write(inode, fattr->cf_eof); | |
208 | ||
209 | /* | |
210 | * i_blocks is not related to (i_size / i_blksize), | |
211 | * but instead 512 byte (2**9) size is required for | |
212 | * calculating num blocks. | |
213 | */ | |
214 | inode->i_blocks = (512 - 1 + fattr->cf_bytes) >> 9; | |
215 | } | |
216 | spin_unlock(&inode->i_lock); | |
217 | ||
01c64fea DH |
218 | if (fattr->cf_flags & CIFS_FATTR_DFS_REFERRAL) |
219 | inode->i_flags |= S_AUTOMOUNT; | |
c2b93e06 JL |
220 | if (inode->i_state & I_NEW) |
221 | cifs_set_ops(inode); | |
cc0bad75 JL |
222 | } |
223 | ||
4065c802 JL |
224 | void |
225 | cifs_fill_uniqueid(struct super_block *sb, struct cifs_fattr *fattr) | |
226 | { | |
227 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
228 | ||
229 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
230 | return; | |
231 | ||
232 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
233 | } | |
234 | ||
cc0bad75 JL |
235 | /* Fill a cifs_fattr struct with info from FILE_UNIX_BASIC_INFO. */ |
236 | void | |
237 | cifs_unix_basic_to_fattr(struct cifs_fattr *fattr, FILE_UNIX_BASIC_INFO *info, | |
238 | struct cifs_sb_info *cifs_sb) | |
239 | { | |
240 | memset(fattr, 0, sizeof(*fattr)); | |
241 | fattr->cf_uniqueid = le64_to_cpu(info->UniqueId); | |
242 | fattr->cf_bytes = le64_to_cpu(info->NumOfBytes); | |
243 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
244 | ||
245 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
246 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastModificationTime); | |
247 | fattr->cf_ctime = cifs_NTtimeToUnix(info->LastStatusChange); | |
6e70e26d SF |
248 | /* old POSIX extensions don't get create time */ |
249 | ||
cc0bad75 | 250 | fattr->cf_mode = le64_to_cpu(info->Permissions); |
75f12983 CH |
251 | |
252 | /* | |
253 | * Since we set the inode type below we need to mask off | |
254 | * to avoid strange results if bits set above. | |
255 | */ | |
cc0bad75 | 256 | fattr->cf_mode &= ~S_IFMT; |
75f12983 CH |
257 | switch (le32_to_cpu(info->Type)) { |
258 | case UNIX_FILE: | |
cc0bad75 JL |
259 | fattr->cf_mode |= S_IFREG; |
260 | fattr->cf_dtype = DT_REG; | |
75f12983 CH |
261 | break; |
262 | case UNIX_SYMLINK: | |
cc0bad75 JL |
263 | fattr->cf_mode |= S_IFLNK; |
264 | fattr->cf_dtype = DT_LNK; | |
75f12983 CH |
265 | break; |
266 | case UNIX_DIR: | |
cc0bad75 JL |
267 | fattr->cf_mode |= S_IFDIR; |
268 | fattr->cf_dtype = DT_DIR; | |
75f12983 CH |
269 | break; |
270 | case UNIX_CHARDEV: | |
cc0bad75 JL |
271 | fattr->cf_mode |= S_IFCHR; |
272 | fattr->cf_dtype = DT_CHR; | |
273 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
274 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
275 | break; |
276 | case UNIX_BLOCKDEV: | |
cc0bad75 JL |
277 | fattr->cf_mode |= S_IFBLK; |
278 | fattr->cf_dtype = DT_BLK; | |
279 | fattr->cf_rdev = MKDEV(le64_to_cpu(info->DevMajor), | |
280 | le64_to_cpu(info->DevMinor) & MINORMASK); | |
75f12983 CH |
281 | break; |
282 | case UNIX_FIFO: | |
cc0bad75 JL |
283 | fattr->cf_mode |= S_IFIFO; |
284 | fattr->cf_dtype = DT_FIFO; | |
75f12983 CH |
285 | break; |
286 | case UNIX_SOCKET: | |
cc0bad75 JL |
287 | fattr->cf_mode |= S_IFSOCK; |
288 | fattr->cf_dtype = DT_SOCK; | |
75f12983 CH |
289 | break; |
290 | default: | |
291 | /* safest to call it a file if we do not know */ | |
cc0bad75 JL |
292 | fattr->cf_mode |= S_IFREG; |
293 | fattr->cf_dtype = DT_REG; | |
f96637be | 294 | cifs_dbg(FYI, "unknown type %d\n", le32_to_cpu(info->Type)); |
75f12983 CH |
295 | break; |
296 | } | |
297 | ||
8401e936 | 298 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
46bbc25f EB |
299 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) { |
300 | u64 id = le64_to_cpu(info->Uid); | |
4a2c8cf5 EB |
301 | if (id < ((uid_t)-1)) { |
302 | kuid_t uid = make_kuid(&init_user_ns, id); | |
303 | if (uid_valid(uid)) | |
304 | fattr->cf_uid = uid; | |
305 | } | |
46bbc25f EB |
306 | } |
307 | ||
8401e936 | 308 | fattr->cf_gid = cifs_sb->ctx->linux_gid; |
46bbc25f EB |
309 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) { |
310 | u64 id = le64_to_cpu(info->Gid); | |
4a2c8cf5 EB |
311 | if (id < ((gid_t)-1)) { |
312 | kgid_t gid = make_kgid(&init_user_ns, id); | |
313 | if (gid_valid(gid)) | |
314 | fattr->cf_gid = gid; | |
315 | } | |
46bbc25f | 316 | } |
75f12983 | 317 | |
cc0bad75 | 318 | fattr->cf_nlink = le64_to_cpu(info->Nlinks); |
75f12983 CH |
319 | } |
320 | ||
b9a3260f | 321 | /* |
cc0bad75 JL |
322 | * Fill a cifs_fattr struct with fake inode info. |
323 | * | |
324 | * Needed to setup cifs_fattr data for the directory which is the | |
325 | * junction to the new submount (ie to setup the fake directory | |
326 | * which represents a DFS referral). | |
b9a3260f | 327 | */ |
f1230c97 | 328 | static void |
cc0bad75 | 329 | cifs_create_dfs_fattr(struct cifs_fattr *fattr, struct super_block *sb) |
0e4bbde9 | 330 | { |
cc0bad75 | 331 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0e4bbde9 | 332 | |
f96637be | 333 | cifs_dbg(FYI, "creating fake fattr for DFS referral\n"); |
cc0bad75 JL |
334 | |
335 | memset(fattr, 0, sizeof(*fattr)); | |
336 | fattr->cf_mode = S_IFDIR | S_IXUGO | S_IRWXU; | |
8401e936 RS |
337 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
338 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
918c9009 | 339 | ktime_get_coarse_real_ts64(&fattr->cf_mtime); |
e37fea58 | 340 | fattr->cf_atime = fattr->cf_ctime = fattr->cf_mtime; |
cc0bad75 | 341 | fattr->cf_nlink = 2; |
97aa495a | 342 | fattr->cf_flags = CIFS_FATTR_DFS_REFERRAL; |
0e4bbde9 SF |
343 | } |
344 | ||
4ad65044 PS |
345 | static int |
346 | cifs_get_file_info_unix(struct file *filp) | |
abab095d JL |
347 | { |
348 | int rc; | |
6d5786a3 | 349 | unsigned int xid; |
abab095d JL |
350 | FILE_UNIX_BASIC_INFO find_data; |
351 | struct cifs_fattr fattr; | |
496ad9aa | 352 | struct inode *inode = file_inode(filp); |
abab095d | 353 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
c21dfb69 | 354 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 355 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
abab095d | 356 | |
6d5786a3 | 357 | xid = get_xid(); |
4b4de76e | 358 | rc = CIFSSMBUnixQFileInfo(xid, tcon, cfile->fid.netfid, &find_data); |
abab095d JL |
359 | if (!rc) { |
360 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
361 | } else if (rc == -EREMOTE) { | |
362 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
363 | rc = 0; | |
364 | } | |
365 | ||
366 | cifs_fattr_to_inode(inode, &fattr); | |
6d5786a3 | 367 | free_xid(xid); |
abab095d JL |
368 | return rc; |
369 | } | |
370 | ||
1da177e4 | 371 | int cifs_get_inode_info_unix(struct inode **pinode, |
cc0bad75 | 372 | const unsigned char *full_path, |
6d5786a3 | 373 | struct super_block *sb, unsigned int xid) |
1da177e4 | 374 | { |
cc0bad75 | 375 | int rc; |
0e4bbde9 | 376 | FILE_UNIX_BASIC_INFO find_data; |
cc0bad75 | 377 | struct cifs_fattr fattr; |
96daf2b0 | 378 | struct cifs_tcon *tcon; |
7ffec372 | 379 | struct tcon_link *tlink; |
1da177e4 | 380 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1da177e4 | 381 | |
f96637be | 382 | cifs_dbg(FYI, "Getting info on %s\n", full_path); |
7962670e | 383 | |
7ffec372 JL |
384 | tlink = cifs_sb_tlink(cifs_sb); |
385 | if (IS_ERR(tlink)) | |
386 | return PTR_ERR(tlink); | |
387 | tcon = tlink_tcon(tlink); | |
388 | ||
1da177e4 | 389 | /* could have done a find first instead but this returns more info */ |
cc0bad75 | 390 | rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, |
bc8ebdc4 | 391 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
7ffec372 | 392 | cifs_put_tlink(tlink); |
e911d0cc | 393 | |
cc0bad75 JL |
394 | if (!rc) { |
395 | cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); | |
396 | } else if (rc == -EREMOTE) { | |
397 | cifs_create_dfs_fattr(&fattr, sb); | |
398 | rc = 0; | |
399 | } else { | |
400 | return rc; | |
401 | } | |
1da177e4 | 402 | |
1b12b9c1 SM |
403 | /* check for Minshall+French symlinks */ |
404 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
405 | int tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
406 | full_path); | |
1b12b9c1 | 407 | if (tmprc) |
cb084b1a | 408 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
409 | } |
410 | ||
0e4bbde9 | 411 | if (*pinode == NULL) { |
cc0bad75 | 412 | /* get new inode */ |
4065c802 | 413 | cifs_fill_uniqueid(sb, &fattr); |
cc0bad75 JL |
414 | *pinode = cifs_iget(sb, &fattr); |
415 | if (!*pinode) | |
0e4bbde9 | 416 | rc = -ENOMEM; |
cc0bad75 JL |
417 | } else { |
418 | /* we already have inode, update it */ | |
7196ac11 NA |
419 | |
420 | /* if uniqueid is different, return error */ | |
421 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
422 | CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 423 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
424 | rc = -ESTALE; |
425 | goto cgiiu_exit; | |
426 | } | |
427 | ||
428 | /* if filetype is different, return error */ | |
429 | if (unlikely(((*pinode)->i_mode & S_IFMT) != | |
430 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 431 | CIFS_I(*pinode)->time = 0; /* force reval */ |
7196ac11 NA |
432 | rc = -ESTALE; |
433 | goto cgiiu_exit; | |
434 | } | |
435 | ||
cc0bad75 | 436 | cifs_fattr_to_inode(*pinode, &fattr); |
0e4bbde9 | 437 | } |
1da177e4 | 438 | |
7196ac11 | 439 | cgiiu_exit: |
1da177e4 LT |
440 | return rc; |
441 | } | |
442 | ||
0b8f18e3 | 443 | static int |
0360d605 | 444 | cifs_sfu_type(struct cifs_fattr *fattr, const char *path, |
6d5786a3 | 445 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
d6e2f2a4 SF |
446 | { |
447 | int rc; | |
db8b631d | 448 | __u32 oplock; |
7ffec372 | 449 | struct tcon_link *tlink; |
96daf2b0 | 450 | struct cifs_tcon *tcon; |
d81b8a40 PS |
451 | struct cifs_fid fid; |
452 | struct cifs_open_parms oparms; | |
7c06514a | 453 | struct cifs_io_parms io_parms = {0}; |
86c96b4b | 454 | char buf[24]; |
d6e2f2a4 | 455 | unsigned int bytes_read; |
fb8c4b14 | 456 | char *pbuf; |
0360d605 | 457 | int buf_type = CIFS_NO_BUFFER; |
d6e2f2a4 SF |
458 | |
459 | pbuf = buf; | |
460 | ||
0b8f18e3 JL |
461 | fattr->cf_mode &= ~S_IFMT; |
462 | ||
463 | if (fattr->cf_eof == 0) { | |
464 | fattr->cf_mode |= S_IFIFO; | |
465 | fattr->cf_dtype = DT_FIFO; | |
d6e2f2a4 | 466 | return 0; |
0b8f18e3 JL |
467 | } else if (fattr->cf_eof < 8) { |
468 | fattr->cf_mode |= S_IFREG; | |
469 | fattr->cf_dtype = DT_REG; | |
d6e2f2a4 SF |
470 | return -EINVAL; /* EOPNOTSUPP? */ |
471 | } | |
50c2f753 | 472 | |
7ffec372 JL |
473 | tlink = cifs_sb_tlink(cifs_sb); |
474 | if (IS_ERR(tlink)) | |
475 | return PTR_ERR(tlink); | |
476 | tcon = tlink_tcon(tlink); | |
477 | ||
d81b8a40 PS |
478 | oparms.tcon = tcon; |
479 | oparms.cifs_sb = cifs_sb; | |
480 | oparms.desired_access = GENERIC_READ; | |
0f060936 | 481 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
482 | oparms.disposition = FILE_OPEN; |
483 | oparms.path = path; | |
484 | oparms.fid = &fid; | |
485 | oparms.reconnect = false; | |
486 | ||
db8b631d SF |
487 | if (tcon->ses->server->oplocks) |
488 | oplock = REQ_OPLOCK; | |
489 | else | |
490 | oplock = 0; | |
491 | rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, NULL); | |
0360d605 | 492 | if (rc) { |
db8b631d | 493 | cifs_dbg(FYI, "check sfu type of %s, open rc = %d\n", path, rc); |
0360d605 PS |
494 | cifs_put_tlink(tlink); |
495 | return rc; | |
496 | } | |
497 | ||
498 | /* Read header */ | |
d81b8a40 | 499 | io_parms.netfid = fid.netfid; |
0360d605 PS |
500 | io_parms.pid = current->tgid; |
501 | io_parms.tcon = tcon; | |
502 | io_parms.offset = 0; | |
503 | io_parms.length = 24; | |
504 | ||
db8b631d SF |
505 | rc = tcon->ses->server->ops->sync_read(xid, &fid, &io_parms, |
506 | &bytes_read, &pbuf, &buf_type); | |
0360d605 PS |
507 | if ((rc == 0) && (bytes_read >= 8)) { |
508 | if (memcmp("IntxBLK", pbuf, 8) == 0) { | |
509 | cifs_dbg(FYI, "Block device\n"); | |
510 | fattr->cf_mode |= S_IFBLK; | |
511 | fattr->cf_dtype = DT_BLK; | |
512 | if (bytes_read == 24) { | |
513 | /* we have enough to decode dev num */ | |
514 | __u64 mjr; /* major */ | |
515 | __u64 mnr; /* minor */ | |
516 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
517 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
518 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
86c96b4b | 519 | } |
0360d605 PS |
520 | } else if (memcmp("IntxCHR", pbuf, 8) == 0) { |
521 | cifs_dbg(FYI, "Char device\n"); | |
522 | fattr->cf_mode |= S_IFCHR; | |
523 | fattr->cf_dtype = DT_CHR; | |
524 | if (bytes_read == 24) { | |
525 | /* we have enough to decode dev num */ | |
526 | __u64 mjr; /* major */ | |
527 | __u64 mnr; /* minor */ | |
528 | mjr = le64_to_cpu(*(__le64 *)(pbuf+8)); | |
529 | mnr = le64_to_cpu(*(__le64 *)(pbuf+16)); | |
530 | fattr->cf_rdev = MKDEV(mjr, mnr); | |
531 | } | |
532 | } else if (memcmp("IntxLNK", pbuf, 7) == 0) { | |
533 | cifs_dbg(FYI, "Symlink\n"); | |
534 | fattr->cf_mode |= S_IFLNK; | |
535 | fattr->cf_dtype = DT_LNK; | |
3020a1f5 | 536 | } else { |
0360d605 | 537 | fattr->cf_mode |= S_IFREG; /* file? */ |
0b8f18e3 | 538 | fattr->cf_dtype = DT_REG; |
0360d605 | 539 | rc = -EOPNOTSUPP; |
fb8c4b14 | 540 | } |
0360d605 PS |
541 | } else { |
542 | fattr->cf_mode |= S_IFREG; /* then it is a file */ | |
543 | fattr->cf_dtype = DT_REG; | |
544 | rc = -EOPNOTSUPP; /* or some unknown SFU type */ | |
d6e2f2a4 | 545 | } |
db8b631d SF |
546 | |
547 | tcon->ses->server->ops->close(xid, tcon, &fid); | |
7ffec372 | 548 | cifs_put_tlink(tlink); |
d6e2f2a4 | 549 | return rc; |
d6e2f2a4 SF |
550 | } |
551 | ||
9e294f1c SF |
552 | #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */ |
553 | ||
0b8f18e3 JL |
554 | /* |
555 | * Fetch mode bits as provided by SFU. | |
556 | * | |
557 | * FIXME: Doesn't this clobber the type bit we got from cifs_sfu_type ? | |
558 | */ | |
559 | static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, | |
6d5786a3 | 560 | struct cifs_sb_info *cifs_sb, unsigned int xid) |
9e294f1c | 561 | { |
3020a1f5 | 562 | #ifdef CONFIG_CIFS_XATTR |
9e294f1c SF |
563 | ssize_t rc; |
564 | char ea_value[4]; | |
565 | __u32 mode; | |
7ffec372 | 566 | struct tcon_link *tlink; |
96daf2b0 | 567 | struct cifs_tcon *tcon; |
7ffec372 JL |
568 | |
569 | tlink = cifs_sb_tlink(cifs_sb); | |
570 | if (IS_ERR(tlink)) | |
571 | return PTR_ERR(tlink); | |
572 | tcon = tlink_tcon(tlink); | |
9e294f1c | 573 | |
d979f3b0 SF |
574 | if (tcon->ses->server->ops->query_all_EAs == NULL) { |
575 | cifs_put_tlink(tlink); | |
576 | return -EOPNOTSUPP; | |
577 | } | |
578 | ||
579 | rc = tcon->ses->server->ops->query_all_EAs(xid, tcon, path, | |
580 | "SETFILEBITS", ea_value, 4 /* size of buf */, | |
67b4c889 | 581 | cifs_sb); |
7ffec372 | 582 | cifs_put_tlink(tlink); |
4523cc30 | 583 | if (rc < 0) |
9e294f1c SF |
584 | return (int)rc; |
585 | else if (rc > 3) { | |
586 | mode = le32_to_cpu(*((__le32 *)ea_value)); | |
0b8f18e3 | 587 | fattr->cf_mode &= ~SFBITS_MASK; |
f96637be JP |
588 | cifs_dbg(FYI, "special bits 0%o org mode 0%o\n", |
589 | mode, fattr->cf_mode); | |
0b8f18e3 | 590 | fattr->cf_mode = (mode & SFBITS_MASK) | fattr->cf_mode; |
f96637be | 591 | cifs_dbg(FYI, "special mode bits 0%o\n", mode); |
9e294f1c | 592 | } |
0b8f18e3 JL |
593 | |
594 | return 0; | |
3020a1f5 SF |
595 | #else |
596 | return -EOPNOTSUPP; | |
597 | #endif | |
9e294f1c SF |
598 | } |
599 | ||
6a5f6592 SF |
600 | /* Fill a cifs_fattr struct with info from POSIX info struct */ |
601 | static void | |
602 | smb311_posix_info_to_fattr(struct cifs_fattr *fattr, struct smb311_posix_qinfo *info, | |
603 | struct super_block *sb, bool adjust_tz, bool symlink) | |
604 | { | |
605 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
606 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
607 | ||
608 | memset(fattr, 0, sizeof(*fattr)); | |
609 | ||
610 | /* no fattr->flags to set */ | |
611 | fattr->cf_cifsattrs = le32_to_cpu(info->DosAttributes); | |
612 | fattr->cf_uniqueid = le64_to_cpu(info->Inode); | |
613 | ||
614 | if (info->LastAccessTime) | |
615 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
616 | else | |
617 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
618 | ||
619 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
620 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
621 | ||
622 | if (adjust_tz) { | |
623 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; | |
624 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
625 | } | |
626 | ||
627 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
628 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
629 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); | |
630 | ||
631 | fattr->cf_nlink = le32_to_cpu(info->HardLinks); | |
632 | fattr->cf_mode = (umode_t) le32_to_cpu(info->Mode); | |
633 | /* The srv fs device id is overridden on network mount so setting rdev isn't needed here */ | |
634 | /* fattr->cf_rdev = le32_to_cpu(info->DeviceId); */ | |
635 | ||
636 | if (symlink) { | |
637 | fattr->cf_mode |= S_IFLNK; | |
638 | fattr->cf_dtype = DT_LNK; | |
639 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
640 | fattr->cf_mode |= S_IFDIR; | |
641 | fattr->cf_dtype = DT_DIR; | |
642 | } else { /* file */ | |
643 | fattr->cf_mode |= S_IFREG; | |
644 | fattr->cf_dtype = DT_REG; | |
645 | } | |
646 | /* else if reparse point ... TODO: add support for FIFO and blk dev; special file types */ | |
647 | ||
8401e936 RS |
648 | fattr->cf_uid = cifs_sb->ctx->linux_uid; /* TODO: map uid and gid from SID */ |
649 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
6a5f6592 SF |
650 | |
651 | cifs_dbg(FYI, "POSIX query info: mode 0x%x uniqueid 0x%llx nlink %d\n", | |
652 | fattr->cf_mode, fattr->cf_uniqueid, fattr->cf_nlink); | |
653 | } | |
654 | ||
655 | ||
0b8f18e3 | 656 | /* Fill a cifs_fattr struct with info from FILE_ALL_INFO */ |
f1230c97 | 657 | static void |
0b8f18e3 | 658 | cifs_all_info_to_fattr(struct cifs_fattr *fattr, FILE_ALL_INFO *info, |
e37fea58 | 659 | struct super_block *sb, bool adjust_tz, |
2e4564b3 | 660 | bool symlink, u32 reparse_tag) |
b9a3260f | 661 | { |
e37fea58 | 662 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 663 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
0d424ad0 | 664 | |
0b8f18e3 JL |
665 | memset(fattr, 0, sizeof(*fattr)); |
666 | fattr->cf_cifsattrs = le32_to_cpu(info->Attributes); | |
667 | if (info->DeletePending) | |
668 | fattr->cf_flags |= CIFS_FATTR_DELETE_PENDING; | |
669 | ||
670 | if (info->LastAccessTime) | |
671 | fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime); | |
918c9009 DD |
672 | else |
673 | ktime_get_coarse_real_ts64(&fattr->cf_atime); | |
0b8f18e3 JL |
674 | |
675 | fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime); | |
676 | fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime); | |
677 | ||
678 | if (adjust_tz) { | |
0d424ad0 JL |
679 | fattr->cf_ctime.tv_sec += tcon->ses->server->timeAdj; |
680 | fattr->cf_mtime.tv_sec += tcon->ses->server->timeAdj; | |
0b8f18e3 JL |
681 | } |
682 | ||
683 | fattr->cf_eof = le64_to_cpu(info->EndOfFile); | |
684 | fattr->cf_bytes = le64_to_cpu(info->AllocationSize); | |
20054bd6 | 685 | fattr->cf_createtime = le64_to_cpu(info->CreationTime); |
0b8f18e3 | 686 | |
74d290da | 687 | fattr->cf_nlink = le32_to_cpu(info->NumberOfLinks); |
2e4564b3 | 688 | if (reparse_tag == IO_REPARSE_TAG_LX_SYMLINK) { |
8401e936 | 689 | fattr->cf_mode |= S_IFLNK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
690 | fattr->cf_dtype = DT_LNK; |
691 | } else if (reparse_tag == IO_REPARSE_TAG_LX_FIFO) { | |
8401e936 | 692 | fattr->cf_mode |= S_IFIFO | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
693 | fattr->cf_dtype = DT_FIFO; |
694 | } else if (reparse_tag == IO_REPARSE_TAG_AF_UNIX) { | |
8401e936 | 695 | fattr->cf_mode |= S_IFSOCK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
696 | fattr->cf_dtype = DT_SOCK; |
697 | } else if (reparse_tag == IO_REPARSE_TAG_LX_CHR) { | |
8401e936 | 698 | fattr->cf_mode |= S_IFCHR | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
699 | fattr->cf_dtype = DT_CHR; |
700 | } else if (reparse_tag == IO_REPARSE_TAG_LX_BLK) { | |
8401e936 | 701 | fattr->cf_mode |= S_IFBLK | cifs_sb->ctx->file_mode; |
2e4564b3 SF |
702 | fattr->cf_dtype = DT_BLK; |
703 | } else if (symlink) { /* TODO add more reparse tag checks */ | |
eb85d94b PS |
704 | fattr->cf_mode = S_IFLNK; |
705 | fattr->cf_dtype = DT_LNK; | |
706 | } else if (fattr->cf_cifsattrs & ATTR_DIRECTORY) { | |
8401e936 | 707 | fattr->cf_mode = S_IFDIR | cifs_sb->ctx->dir_mode; |
0b8f18e3 | 708 | fattr->cf_dtype = DT_DIR; |
6de2ce42 PS |
709 | /* |
710 | * Server can return wrong NumberOfLinks value for directories | |
711 | * when Unix extensions are disabled - fake it. | |
712 | */ | |
74d290da JM |
713 | if (!tcon->unix_ext) |
714 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; | |
0b8f18e3 | 715 | } else { |
8401e936 | 716 | fattr->cf_mode = S_IFREG | cifs_sb->ctx->file_mode; |
0b8f18e3 | 717 | fattr->cf_dtype = DT_REG; |
0b8f18e3 | 718 | |
d0c280d2 JL |
719 | /* clear write bits if ATTR_READONLY is set */ |
720 | if (fattr->cf_cifsattrs & ATTR_READONLY) | |
721 | fattr->cf_mode &= ~(S_IWUGO); | |
0b8f18e3 | 722 | |
74d290da JM |
723 | /* |
724 | * Don't accept zero nlink from non-unix servers unless | |
725 | * delete is pending. Instead mark it as unknown. | |
726 | */ | |
727 | if ((fattr->cf_nlink < 1) && !tcon->unix_ext && | |
728 | !info->DeletePending) { | |
fb4b5f13 JP |
729 | cifs_dbg(VFS, "bogus file nlink value %u\n", |
730 | fattr->cf_nlink); | |
74d290da | 731 | fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK; |
6658b9f7 | 732 | } |
6de2ce42 | 733 | } |
0b8f18e3 | 734 | |
8401e936 RS |
735 | fattr->cf_uid = cifs_sb->ctx->linux_uid; |
736 | fattr->cf_gid = cifs_sb->ctx->linux_gid; | |
b9a3260f SF |
737 | } |
738 | ||
4ad65044 PS |
739 | static int |
740 | cifs_get_file_info(struct file *filp) | |
abab095d JL |
741 | { |
742 | int rc; | |
6d5786a3 | 743 | unsigned int xid; |
abab095d JL |
744 | FILE_ALL_INFO find_data; |
745 | struct cifs_fattr fattr; | |
496ad9aa | 746 | struct inode *inode = file_inode(filp); |
c21dfb69 | 747 | struct cifsFileInfo *cfile = filp->private_data; |
96daf2b0 | 748 | struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); |
4ad65044 PS |
749 | struct TCP_Server_Info *server = tcon->ses->server; |
750 | ||
751 | if (!server->ops->query_file_info) | |
752 | return -ENOSYS; | |
abab095d | 753 | |
6d5786a3 | 754 | xid = get_xid(); |
4ad65044 | 755 | rc = server->ops->query_file_info(xid, tcon, &cfile->fid, &find_data); |
42274bb2 PS |
756 | switch (rc) { |
757 | case 0: | |
2e4564b3 | 758 | /* TODO: add support to query reparse tag */ |
e37fea58 | 759 | cifs_all_info_to_fattr(&fattr, &find_data, inode->i_sb, false, |
2e4564b3 | 760 | false, 0 /* no reparse tag */); |
42274bb2 PS |
761 | break; |
762 | case -EREMOTE: | |
763 | cifs_create_dfs_fattr(&fattr, inode->i_sb); | |
764 | rc = 0; | |
765 | break; | |
766 | case -EOPNOTSUPP: | |
767 | case -EINVAL: | |
abab095d JL |
768 | /* |
769 | * FIXME: legacy server -- fall back to path-based call? | |
ff215713 SF |
770 | * for now, just skip revalidating and mark inode for |
771 | * immediate reval. | |
772 | */ | |
abab095d JL |
773 | rc = 0; |
774 | CIFS_I(inode)->time = 0; | |
21ac58f4 | 775 | goto cgfi_exit; |
42274bb2 | 776 | default: |
abab095d | 777 | goto cgfi_exit; |
42274bb2 | 778 | } |
abab095d JL |
779 | |
780 | /* | |
781 | * don't bother with SFU junk here -- just mark inode as needing | |
782 | * revalidation. | |
783 | */ | |
abab095d JL |
784 | fattr.cf_uniqueid = CIFS_I(inode)->uniqueid; |
785 | fattr.cf_flags |= CIFS_FATTR_NEED_REVAL; | |
786 | cifs_fattr_to_inode(inode, &fattr); | |
787 | cgfi_exit: | |
6d5786a3 | 788 | free_xid(xid); |
abab095d JL |
789 | return rc; |
790 | } | |
791 | ||
7ea884c7 SF |
792 | /* Simple function to return a 64 bit hash of string. Rarely called */ |
793 | static __u64 simple_hashstr(const char *str) | |
794 | { | |
3995bbf5 | 795 | const __u64 hash_mult = 1125899906842597ULL; /* a big enough prime */ |
7ea884c7 SF |
796 | __u64 hash = 0; |
797 | ||
798 | while (*str) | |
799 | hash = (hash + (__u64) *str++) * hash_mult; | |
800 | ||
801 | return hash; | |
802 | } | |
803 | ||
b8f7442b AA |
804 | /** |
805 | * cifs_backup_query_path_info - SMB1 fallback code to get ino | |
806 | * | |
807 | * Fallback code to get file metadata when we don't have access to | |
607dfc79 | 808 | * full_path (EACCES) and have backup creds. |
b8f7442b | 809 | * |
607dfc79 SF |
810 | * @xid: transaction id used to identify original request in logs |
811 | * @tcon: information about the server share we have mounted | |
812 | * @sb: the superblock stores info such as disk space available | |
813 | * @full_path: name of the file we are getting the metadata for | |
814 | * @resp_buf: will be set to cifs resp buf and needs to be freed with | |
815 | * cifs_buf_release() when done with @data | |
816 | * @data: will be set to search info result buffer | |
b8f7442b AA |
817 | */ |
818 | static int | |
819 | cifs_backup_query_path_info(int xid, | |
820 | struct cifs_tcon *tcon, | |
821 | struct super_block *sb, | |
822 | const char *full_path, | |
823 | void **resp_buf, | |
824 | FILE_ALL_INFO **data) | |
825 | { | |
826 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
827 | struct cifs_search_info info = {0}; | |
828 | u16 flags; | |
829 | int rc; | |
830 | ||
831 | *resp_buf = NULL; | |
832 | info.endOfSearch = false; | |
833 | if (tcon->unix_ext) | |
834 | info.info_level = SMB_FIND_FILE_UNIX; | |
835 | else if ((tcon->ses->capabilities & | |
836 | tcon->ses->server->vals->cap_nt_find) == 0) | |
837 | info.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
838 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
839 | info.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
840 | else /* no srvino useful for fallback to some netapp */ | |
841 | info.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
842 | ||
843 | flags = CIFS_SEARCH_CLOSE_ALWAYS | | |
844 | CIFS_SEARCH_CLOSE_AT_END | | |
845 | CIFS_SEARCH_BACKUP_SEARCH; | |
846 | ||
847 | rc = CIFSFindFirst(xid, tcon, full_path, | |
848 | cifs_sb, NULL, flags, &info, false); | |
849 | if (rc) | |
850 | return rc; | |
851 | ||
852 | *resp_buf = (void *)info.ntwrk_buf_start; | |
853 | *data = (FILE_ALL_INFO *)info.srch_entries_start; | |
854 | return 0; | |
855 | } | |
856 | ||
857 | static void | |
858 | cifs_set_fattr_ino(int xid, | |
859 | struct cifs_tcon *tcon, | |
860 | struct super_block *sb, | |
861 | struct inode **inode, | |
862 | const char *full_path, | |
863 | FILE_ALL_INFO *data, | |
864 | struct cifs_fattr *fattr) | |
865 | { | |
866 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
867 | struct TCP_Server_Info *server = tcon->ses->server; | |
868 | int rc; | |
869 | ||
870 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { | |
871 | if (*inode) | |
872 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
873 | else | |
874 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
875 | return; | |
876 | } | |
877 | ||
878 | /* | |
879 | * If we have an inode pass a NULL tcon to ensure we don't | |
880 | * make a round trip to the server. This only works for SMB2+. | |
881 | */ | |
882 | rc = server->ops->get_srv_inum(xid, | |
883 | *inode ? NULL : tcon, | |
884 | cifs_sb, full_path, | |
885 | &fattr->cf_uniqueid, | |
886 | data); | |
887 | if (rc) { | |
888 | /* | |
889 | * If that fails reuse existing ino or generate one | |
890 | * and disable server ones | |
891 | */ | |
892 | if (*inode) | |
893 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
894 | else { | |
895 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
896 | cifs_autodisable_serverino(cifs_sb); | |
897 | } | |
898 | return; | |
899 | } | |
900 | ||
901 | /* If no errors, check for zero root inode (invalid) */ | |
902 | if (fattr->cf_uniqueid == 0 && strlen(full_path) == 0) { | |
903 | cifs_dbg(FYI, "Invalid (0) inodenum\n"); | |
904 | if (*inode) { | |
905 | /* reuse */ | |
906 | fattr->cf_uniqueid = CIFS_I(*inode)->uniqueid; | |
907 | } else { | |
908 | /* make an ino by hashing the UNC */ | |
909 | fattr->cf_flags |= CIFS_FATTR_FAKE_ROOT_INO; | |
910 | fattr->cf_uniqueid = simple_hashstr(tcon->treeName); | |
911 | } | |
912 | } | |
913 | } | |
914 | ||
915 | static inline bool is_inode_cache_good(struct inode *ino) | |
916 | { | |
917 | return ino && CIFS_CACHE_READ(CIFS_I(ino)) && CIFS_I(ino)->time != 0; | |
918 | } | |
919 | ||
1208ef1f | 920 | int |
b8f7442b AA |
921 | cifs_get_inode_info(struct inode **inode, |
922 | const char *full_path, | |
923 | FILE_ALL_INFO *in_data, | |
924 | struct super_block *sb, int xid, | |
42eacf9e | 925 | const struct cifs_fid *fid) |
1da177e4 | 926 | { |
b8f7442b | 927 | |
1208ef1f PS |
928 | struct cifs_tcon *tcon; |
929 | struct TCP_Server_Info *server; | |
7ffec372 | 930 | struct tcon_link *tlink; |
1da177e4 | 931 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
1208ef1f | 932 | bool adjust_tz = false; |
b8f7442b | 933 | struct cifs_fattr fattr = {0}; |
2e4564b3 | 934 | bool is_reparse_point = false; |
b8f7442b AA |
935 | FILE_ALL_INFO *data = in_data; |
936 | FILE_ALL_INFO *tmp_data = NULL; | |
937 | void *smb1_backup_rsp_buf = NULL; | |
938 | int rc = 0; | |
939 | int tmprc = 0; | |
2e4564b3 | 940 | __u32 reparse_tag = 0; |
1da177e4 | 941 | |
7ffec372 JL |
942 | tlink = cifs_sb_tlink(cifs_sb); |
943 | if (IS_ERR(tlink)) | |
944 | return PTR_ERR(tlink); | |
1208ef1f PS |
945 | tcon = tlink_tcon(tlink); |
946 | server = tcon->ses->server; | |
7ffec372 | 947 | |
b8f7442b AA |
948 | /* |
949 | * 1. Fetch file metadata if not provided (data) | |
950 | */ | |
1da177e4 | 951 | |
b8f7442b AA |
952 | if (!data) { |
953 | if (is_inode_cache_good(*inode)) { | |
f96637be | 954 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); |
b8f7442b | 955 | goto out; |
1da177e4 | 956 | } |
b8f7442b AA |
957 | tmp_data = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
958 | if (!tmp_data) { | |
7ffec372 | 959 | rc = -ENOMEM; |
b8f7442b | 960 | goto out; |
7ffec372 | 961 | } |
b8f7442b | 962 | rc = server->ops->query_path_info(xid, tcon, cifs_sb, |
2e4564b3 SF |
963 | full_path, tmp_data, |
964 | &adjust_tz, &is_reparse_point); | |
b8f7442b | 965 | data = tmp_data; |
1da177e4 | 966 | } |
0b8f18e3 | 967 | |
b8f7442b AA |
968 | /* |
969 | * 2. Convert it to internal cifs metadata (fattr) | |
970 | */ | |
971 | ||
972 | switch (rc) { | |
973 | case 0: | |
2e4564b3 SF |
974 | /* |
975 | * If the file is a reparse point, it is more complicated | |
976 | * since we have to check if its reparse tag matches a known | |
977 | * special file type e.g. symlink or fifo or char etc. | |
978 | */ | |
979 | if ((le32_to_cpu(data->Attributes) & ATTR_REPARSE) && | |
980 | server->ops->query_reparse_tag) { | |
981 | rc = server->ops->query_reparse_tag(xid, tcon, cifs_sb, | |
982 | full_path, &reparse_tag); | |
983 | cifs_dbg(FYI, "reparse tag 0x%x\n", reparse_tag); | |
984 | } | |
985 | cifs_all_info_to_fattr(&fattr, data, sb, adjust_tz, | |
986 | is_reparse_point, reparse_tag); | |
b8f7442b AA |
987 | break; |
988 | case -EREMOTE: | |
989 | /* DFS link, no metadata available on this server */ | |
0b8f18e3 | 990 | cifs_create_dfs_fattr(&fattr, sb); |
b9a3260f | 991 | rc = 0; |
b8f7442b AA |
992 | break; |
993 | case -EACCES: | |
3b7960ca | 994 | /* |
b8f7442b AA |
995 | * perm errors, try again with backup flags if possible |
996 | * | |
997 | * For SMB2 and later the backup intent flag | |
998 | * is already sent if needed on open and there | |
999 | * is no path based FindFirst operation to use | |
1000 | * to retry with | |
3b7960ca | 1001 | */ |
b8f7442b AA |
1002 | if (backup_cred(cifs_sb) && is_smb1_server(server)) { |
1003 | /* for easier reading */ | |
1004 | FILE_DIRECTORY_INFO *fdi; | |
1005 | SEARCH_ID_FULL_DIR_INFO *si; | |
1006 | ||
1007 | rc = cifs_backup_query_path_info(xid, tcon, sb, | |
1008 | full_path, | |
1009 | &smb1_backup_rsp_buf, | |
1010 | &data); | |
1011 | if (rc) | |
1012 | goto out; | |
1013 | ||
1014 | fdi = (FILE_DIRECTORY_INFO *)data; | |
1015 | si = (SEARCH_ID_FULL_DIR_INFO *)data; | |
1016 | ||
1017 | cifs_dir_info_to_fattr(&fattr, fdi, cifs_sb); | |
1018 | fattr.cf_uniqueid = le64_to_cpu(si->UniqueId); | |
1019 | /* uniqueid set, skip get inum step */ | |
1020 | goto handle_mnt_opt; | |
1021 | } else { | |
1022 | /* nothing we can do, bail out */ | |
1023 | goto out; | |
3b7960ca | 1024 | } |
b8f7442b AA |
1025 | break; |
1026 | default: | |
1027 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
1028 | goto out; | |
1029 | } | |
c052e2b4 | 1030 | |
b8f7442b AA |
1031 | /* |
1032 | * 3. Get or update inode number (fattr.cf_uniqueid) | |
1033 | */ | |
1034 | ||
1035 | cifs_set_fattr_ino(xid, tcon, sb, inode, full_path, data, &fattr); | |
1da177e4 | 1036 | |
0b8f18e3 | 1037 | /* |
b8f7442b | 1038 | * 4. Tweak fattr based on mount options |
0b8f18e3 | 1039 | */ |
b9a3260f | 1040 | |
b8f7442b | 1041 | handle_mnt_opt: |
0b8f18e3 JL |
1042 | /* query for SFU type info if supported and needed */ |
1043 | if (fattr.cf_cifsattrs & ATTR_SYSTEM && | |
1044 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { | |
1045 | tmprc = cifs_sfu_type(&fattr, full_path, cifs_sb, xid); | |
1046 | if (tmprc) | |
f96637be | 1047 | cifs_dbg(FYI, "cifs_sfu_type failed: %d\n", tmprc); |
b9a3260f | 1048 | } |
1da177e4 | 1049 | |
b9a3260f | 1050 | /* fill in 0777 bits from ACL */ |
e2f8fbfb SF |
1051 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) { |
1052 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true, | |
1053 | full_path, fid); | |
01ec372c RS |
1054 | if (rc == -EREMOTE) |
1055 | rc = 0; | |
e2f8fbfb SF |
1056 | if (rc) { |
1057 | cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n", | |
b8f7442b AA |
1058 | __func__, rc); |
1059 | goto out; | |
e2f8fbfb SF |
1060 | } |
1061 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { | |
1062 | rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false, | |
68464b88 | 1063 | full_path, fid); |
01ec372c RS |
1064 | if (rc == -EREMOTE) |
1065 | rc = 0; | |
68464b88 | 1066 | if (rc) { |
f96637be JP |
1067 | cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n", |
1068 | __func__, rc); | |
b8f7442b | 1069 | goto out; |
78415d2d | 1070 | } |
b9a3260f | 1071 | } |
b9a3260f | 1072 | |
0b8f18e3 JL |
1073 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
1074 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
1075 | cifs_sfu_mode(&fattr, full_path, cifs_sb, xid); | |
b9a3260f | 1076 | |
1b12b9c1 SM |
1077 | /* check for Minshall+French symlinks */ |
1078 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
cb084b1a SP |
1079 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, |
1080 | full_path); | |
1b12b9c1 | 1081 | if (tmprc) |
cb084b1a | 1082 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); |
1b12b9c1 SM |
1083 | } |
1084 | ||
b8f7442b AA |
1085 | /* |
1086 | * 5. Update inode with final fattr data | |
1087 | */ | |
1088 | ||
1208ef1f PS |
1089 | if (!*inode) { |
1090 | *inode = cifs_iget(sb, &fattr); | |
1091 | if (!*inode) | |
0b8f18e3 JL |
1092 | rc = -ENOMEM; |
1093 | } else { | |
7196ac11 NA |
1094 | /* we already have inode, update it */ |
1095 | ||
a108471b RL |
1096 | /* if uniqueid is different, return error */ |
1097 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1098 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
c82e5ac7 | 1099 | CIFS_I(*inode)->time = 0; /* force reval */ |
a108471b | 1100 | rc = -ESTALE; |
b8f7442b | 1101 | goto out; |
a108471b RL |
1102 | } |
1103 | ||
7196ac11 NA |
1104 | /* if filetype is different, return error */ |
1105 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
1106 | (fattr.cf_mode & S_IFMT))) { | |
c82e5ac7 | 1107 | CIFS_I(*inode)->time = 0; /* force reval */ |
7196ac11 | 1108 | rc = -ESTALE; |
b8f7442b | 1109 | goto out; |
7196ac11 NA |
1110 | } |
1111 | ||
1208ef1f | 1112 | cifs_fattr_to_inode(*inode, &fattr); |
0b8f18e3 | 1113 | } |
b8f7442b AA |
1114 | out: |
1115 | cifs_buf_release(smb1_backup_rsp_buf); | |
7ffec372 | 1116 | cifs_put_tlink(tlink); |
b8f7442b | 1117 | kfree(tmp_data); |
1da177e4 LT |
1118 | return rc; |
1119 | } | |
1120 | ||
6a5f6592 SF |
1121 | int |
1122 | smb311_posix_get_inode_info(struct inode **inode, | |
1123 | const char *full_path, | |
1124 | struct super_block *sb, unsigned int xid) | |
1125 | { | |
1126 | struct cifs_tcon *tcon; | |
6a5f6592 SF |
1127 | struct tcon_link *tlink; |
1128 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
1129 | bool adjust_tz = false; | |
1130 | struct cifs_fattr fattr = {0}; | |
1131 | bool symlink = false; | |
1132 | struct smb311_posix_qinfo *data = NULL; | |
1133 | int rc = 0; | |
1134 | int tmprc = 0; | |
1135 | ||
1136 | tlink = cifs_sb_tlink(cifs_sb); | |
1137 | if (IS_ERR(tlink)) | |
1138 | return PTR_ERR(tlink); | |
1139 | tcon = tlink_tcon(tlink); | |
6a5f6592 SF |
1140 | |
1141 | /* | |
1142 | * 1. Fetch file metadata | |
1143 | */ | |
1144 | ||
1145 | if (is_inode_cache_good(*inode)) { | |
1146 | cifs_dbg(FYI, "No need to revalidate cached inode sizes\n"); | |
1147 | goto out; | |
1148 | } | |
1149 | data = kmalloc(sizeof(struct smb311_posix_qinfo), GFP_KERNEL); | |
1150 | if (!data) { | |
1151 | rc = -ENOMEM; | |
1152 | goto out; | |
1153 | } | |
1154 | ||
1155 | rc = smb311_posix_query_path_info(xid, tcon, cifs_sb, | |
1156 | full_path, data, | |
1157 | &adjust_tz, &symlink); | |
1158 | ||
1159 | /* | |
1160 | * 2. Convert it to internal cifs metadata (fattr) | |
1161 | */ | |
1162 | ||
1163 | switch (rc) { | |
1164 | case 0: | |
1165 | smb311_posix_info_to_fattr(&fattr, data, sb, adjust_tz, symlink); | |
1166 | break; | |
1167 | case -EREMOTE: | |
1168 | /* DFS link, no metadata available on this server */ | |
1169 | cifs_create_dfs_fattr(&fattr, sb); | |
1170 | rc = 0; | |
1171 | break; | |
1172 | case -EACCES: | |
1173 | /* | |
1174 | * For SMB2 and later the backup intent flag | |
1175 | * is already sent if needed on open and there | |
1176 | * is no path based FindFirst operation to use | |
1177 | * to retry with so nothing we can do, bail out | |
1178 | */ | |
1179 | goto out; | |
1180 | default: | |
1181 | cifs_dbg(FYI, "%s: unhandled err rc %d\n", __func__, rc); | |
1182 | goto out; | |
1183 | } | |
1184 | ||
1185 | ||
1186 | /* | |
a7a519a4 | 1187 | * 3. Tweak fattr based on mount options |
6a5f6592 SF |
1188 | */ |
1189 | ||
1190 | /* check for Minshall+French symlinks */ | |
1191 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) { | |
1192 | tmprc = check_mf_symlink(xid, tcon, cifs_sb, &fattr, | |
1193 | full_path); | |
1194 | if (tmprc) | |
1195 | cifs_dbg(FYI, "check_mf_symlink: %d\n", tmprc); | |
1196 | } | |
1197 | ||
1198 | /* | |
a7a519a4 | 1199 | * 4. Update inode with final fattr data |
6a5f6592 SF |
1200 | */ |
1201 | ||
1202 | if (!*inode) { | |
1203 | *inode = cifs_iget(sb, &fattr); | |
1204 | if (!*inode) | |
1205 | rc = -ENOMEM; | |
1206 | } else { | |
1207 | /* we already have inode, update it */ | |
1208 | ||
1209 | /* if uniqueid is different, return error */ | |
1210 | if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM && | |
1211 | CIFS_I(*inode)->uniqueid != fattr.cf_uniqueid)) { | |
1212 | CIFS_I(*inode)->time = 0; /* force reval */ | |
1213 | rc = -ESTALE; | |
1214 | goto out; | |
1215 | } | |
1216 | ||
1217 | /* if filetype is different, return error */ | |
1218 | if (unlikely(((*inode)->i_mode & S_IFMT) != | |
1219 | (fattr.cf_mode & S_IFMT))) { | |
1220 | CIFS_I(*inode)->time = 0; /* force reval */ | |
1221 | rc = -ESTALE; | |
1222 | goto out; | |
1223 | } | |
1224 | ||
1225 | cifs_fattr_to_inode(*inode, &fattr); | |
1226 | } | |
1227 | out: | |
1228 | cifs_put_tlink(tlink); | |
1229 | kfree(data); | |
1230 | return rc; | |
1231 | } | |
1232 | ||
1233 | ||
7f8ed420 SF |
1234 | static const struct inode_operations cifs_ipc_inode_ops = { |
1235 | .lookup = cifs_lookup, | |
1236 | }; | |
1237 | ||
cc0bad75 JL |
1238 | static int |
1239 | cifs_find_inode(struct inode *inode, void *opaque) | |
1240 | { | |
1241 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1242 | ||
f30b9c11 | 1243 | /* don't match inode with different uniqueid */ |
cc0bad75 JL |
1244 | if (CIFS_I(inode)->uniqueid != fattr->cf_uniqueid) |
1245 | return 0; | |
1246 | ||
20054bd6 JL |
1247 | /* use createtime like an i_generation field */ |
1248 | if (CIFS_I(inode)->createtime != fattr->cf_createtime) | |
1249 | return 0; | |
1250 | ||
f30b9c11 JL |
1251 | /* don't match inode of different type */ |
1252 | if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT)) | |
1253 | return 0; | |
1254 | ||
5acfec25 | 1255 | /* if it's not a directory or has no dentries, then flag it */ |
b3d9b7a3 | 1256 | if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry)) |
3d694380 | 1257 | fattr->cf_flags |= CIFS_FATTR_INO_COLLISION; |
3d694380 | 1258 | |
cc0bad75 JL |
1259 | return 1; |
1260 | } | |
1261 | ||
1262 | static int | |
1263 | cifs_init_inode(struct inode *inode, void *opaque) | |
1264 | { | |
1265 | struct cifs_fattr *fattr = (struct cifs_fattr *) opaque; | |
1266 | ||
1267 | CIFS_I(inode)->uniqueid = fattr->cf_uniqueid; | |
20054bd6 | 1268 | CIFS_I(inode)->createtime = fattr->cf_createtime; |
cc0bad75 JL |
1269 | return 0; |
1270 | } | |
1271 | ||
5acfec25 JL |
1272 | /* |
1273 | * walk dentry list for an inode and report whether it has aliases that | |
1274 | * are hashed. We use this to determine if a directory inode can actually | |
1275 | * be used. | |
1276 | */ | |
1277 | static bool | |
1278 | inode_has_hashed_dentries(struct inode *inode) | |
1279 | { | |
1280 | struct dentry *dentry; | |
1281 | ||
873feea0 | 1282 | spin_lock(&inode->i_lock); |
946e51f2 | 1283 | hlist_for_each_entry(dentry, &inode->i_dentry, d_u.d_alias) { |
5acfec25 | 1284 | if (!d_unhashed(dentry) || IS_ROOT(dentry)) { |
873feea0 | 1285 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1286 | return true; |
1287 | } | |
1288 | } | |
873feea0 | 1289 | spin_unlock(&inode->i_lock); |
5acfec25 JL |
1290 | return false; |
1291 | } | |
1292 | ||
cc0bad75 JL |
1293 | /* Given fattrs, get a corresponding inode */ |
1294 | struct inode * | |
1295 | cifs_iget(struct super_block *sb, struct cifs_fattr *fattr) | |
1296 | { | |
1297 | unsigned long hash; | |
1298 | struct inode *inode; | |
1299 | ||
3d694380 | 1300 | retry_iget5_locked: |
f96637be | 1301 | cifs_dbg(FYI, "looking for uniqueid=%llu\n", fattr->cf_uniqueid); |
cc0bad75 JL |
1302 | |
1303 | /* hash down to 32-bits on 32-bit arch */ | |
1304 | hash = cifs_uniqueid_to_ino_t(fattr->cf_uniqueid); | |
1305 | ||
1306 | inode = iget5_locked(sb, hash, cifs_find_inode, cifs_init_inode, fattr); | |
cc0bad75 | 1307 | if (inode) { |
5acfec25 | 1308 | /* was there a potentially problematic inode collision? */ |
3d694380 | 1309 | if (fattr->cf_flags & CIFS_FATTR_INO_COLLISION) { |
3d694380 | 1310 | fattr->cf_flags &= ~CIFS_FATTR_INO_COLLISION; |
5acfec25 JL |
1311 | |
1312 | if (inode_has_hashed_dentries(inode)) { | |
1313 | cifs_autodisable_serverino(CIFS_SB(sb)); | |
1314 | iput(inode); | |
1315 | fattr->cf_uniqueid = iunique(sb, ROOT_I); | |
1316 | goto retry_iget5_locked; | |
1317 | } | |
3d694380 JL |
1318 | } |
1319 | ||
cc0bad75 | 1320 | cifs_fattr_to_inode(inode, fattr); |
1751e8a6 | 1321 | if (sb->s_flags & SB_NOATIME) |
cc0bad75 JL |
1322 | inode->i_flags |= S_NOATIME | S_NOCMTIME; |
1323 | if (inode->i_state & I_NEW) { | |
1324 | inode->i_ino = hash; | |
0ccd4802 | 1325 | #ifdef CONFIG_CIFS_FSCACHE |
9451a9a5 SJ |
1326 | /* initialize per-inode cache cookie pointer */ |
1327 | CIFS_I(inode)->fscache = NULL; | |
0ccd4802 | 1328 | #endif |
cc0bad75 JL |
1329 | unlock_new_inode(inode); |
1330 | } | |
1331 | } | |
1332 | ||
1333 | return inode; | |
1334 | } | |
1335 | ||
1da177e4 | 1336 | /* gets root inode */ |
9b6763e0 | 1337 | struct inode *cifs_root_iget(struct super_block *sb) |
1da177e4 | 1338 | { |
6d5786a3 | 1339 | unsigned int xid; |
0d424ad0 | 1340 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
cc0bad75 | 1341 | struct inode *inode = NULL; |
ce634ab2 | 1342 | long rc; |
96daf2b0 | 1343 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
a6b5058f AA |
1344 | char *path = NULL; |
1345 | int len; | |
1346 | ||
1347 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) | |
1348 | && cifs_sb->prepath) { | |
1349 | len = strlen(cifs_sb->prepath); | |
1350 | path = kzalloc(len + 2 /* leading sep + null */, GFP_KERNEL); | |
1351 | if (path == NULL) | |
1352 | return ERR_PTR(-ENOMEM); | |
1353 | path[0] = '/'; | |
1354 | memcpy(path+1, cifs_sb->prepath, len); | |
1355 | } else { | |
1356 | path = kstrdup("", GFP_KERNEL); | |
1357 | if (path == NULL) | |
1358 | return ERR_PTR(-ENOMEM); | |
1359 | } | |
ce634ab2 | 1360 | |
6d5786a3 | 1361 | xid = get_xid(); |
b5b374ea | 1362 | if (tcon->unix_ext) { |
a6b5058f | 1363 | rc = cifs_get_inode_info_unix(&inode, path, sb, xid); |
b5b374ea SF |
1364 | /* some servers mistakenly claim POSIX support */ |
1365 | if (rc != -EOPNOTSUPP) | |
1366 | goto iget_no_retry; | |
a0a3036b | 1367 | cifs_dbg(VFS, "server does not support POSIX extensions\n"); |
b5b374ea SF |
1368 | tcon->unix_ext = false; |
1369 | } | |
1370 | ||
a6b5058f | 1371 | convert_delimiter(path, CIFS_DIR_SEP(cifs_sb)); |
d313852d SF |
1372 | if (tcon->posix_extensions) |
1373 | rc = smb311_posix_get_inode_info(&inode, path, sb, xid); | |
1374 | else | |
1375 | rc = cifs_get_inode_info(&inode, path, NULL, sb, xid, NULL); | |
0b8f18e3 | 1376 | |
b5b374ea | 1377 | iget_no_retry: |
a7851ce7 OS |
1378 | if (!inode) { |
1379 | inode = ERR_PTR(rc); | |
1380 | goto out; | |
1381 | } | |
cc0bad75 | 1382 | |
0ccd4802 | 1383 | #ifdef CONFIG_CIFS_FSCACHE |
d03382ce | 1384 | /* populate tcon->resource_id */ |
0d424ad0 | 1385 | tcon->resource_id = CIFS_I(inode)->uniqueid; |
0ccd4802 | 1386 | #endif |
d03382ce | 1387 | |
b327a717 | 1388 | if (rc && tcon->pipe) { |
f96637be | 1389 | cifs_dbg(FYI, "ipc connection - fake read inode\n"); |
b7ca6928 | 1390 | spin_lock(&inode->i_lock); |
7f8ed420 | 1391 | inode->i_mode |= S_IFDIR; |
bfe86848 | 1392 | set_nlink(inode, 2); |
7f8ed420 SF |
1393 | inode->i_op = &cifs_ipc_inode_ops; |
1394 | inode->i_fop = &simple_dir_operations; | |
8401e936 RS |
1395 | inode->i_uid = cifs_sb->ctx->linux_uid; |
1396 | inode->i_gid = cifs_sb->ctx->linux_gid; | |
b7ca6928 | 1397 | spin_unlock(&inode->i_lock); |
ad661334 | 1398 | } else if (rc) { |
ce634ab2 | 1399 | iget_failed(inode); |
a7851ce7 | 1400 | inode = ERR_PTR(rc); |
7f8ed420 SF |
1401 | } |
1402 | ||
a7851ce7 | 1403 | out: |
a6b5058f | 1404 | kfree(path); |
31cd106b | 1405 | free_xid(xid); |
ce634ab2 | 1406 | return inode; |
1da177e4 LT |
1407 | } |
1408 | ||
ed6875e0 | 1409 | int |
6d5786a3 | 1410 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, unsigned int xid, |
f6f1f179 | 1411 | const char *full_path, __u32 dosattr) |
388e57b2 | 1412 | { |
388e57b2 | 1413 | bool set_time = false; |
388e57b2 | 1414 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
6bdf6dbd | 1415 | struct TCP_Server_Info *server; |
388e57b2 SF |
1416 | FILE_BASIC_INFO info_buf; |
1417 | ||
1adcb710 SF |
1418 | if (attrs == NULL) |
1419 | return -EINVAL; | |
1420 | ||
6bdf6dbd PS |
1421 | server = cifs_sb_master_tcon(cifs_sb)->ses->server; |
1422 | if (!server->ops->set_file_info) | |
1423 | return -ENOSYS; | |
1424 | ||
fd09b7d3 SF |
1425 | info_buf.Pad = 0; |
1426 | ||
388e57b2 SF |
1427 | if (attrs->ia_valid & ATTR_ATIME) { |
1428 | set_time = true; | |
1429 | info_buf.LastAccessTime = | |
95390201 | 1430 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
388e57b2 SF |
1431 | } else |
1432 | info_buf.LastAccessTime = 0; | |
1433 | ||
1434 | if (attrs->ia_valid & ATTR_MTIME) { | |
1435 | set_time = true; | |
1436 | info_buf.LastWriteTime = | |
95390201 | 1437 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
388e57b2 SF |
1438 | } else |
1439 | info_buf.LastWriteTime = 0; | |
1440 | ||
1441 | /* | |
1442 | * Samba throws this field away, but windows may actually use it. | |
1443 | * Do not set ctime unless other time stamps are changed explicitly | |
1444 | * (i.e. by utimes()) since we would then have a mix of client and | |
1445 | * server times. | |
1446 | */ | |
1447 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { | |
f96637be | 1448 | cifs_dbg(FYI, "CIFS - CTIME changed\n"); |
388e57b2 | 1449 | info_buf.ChangeTime = |
95390201 | 1450 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
388e57b2 SF |
1451 | } else |
1452 | info_buf.ChangeTime = 0; | |
1453 | ||
1454 | info_buf.CreationTime = 0; /* don't change */ | |
1455 | info_buf.Attributes = cpu_to_le32(dosattr); | |
1456 | ||
6bdf6dbd | 1457 | return server->ops->set_file_info(inode, full_path, &info_buf, xid); |
388e57b2 SF |
1458 | } |
1459 | ||
a12a1ac7 | 1460 | /* |
ed6875e0 | 1461 | * Open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
a12a1ac7 JL |
1462 | * and rename it to a random name that hopefully won't conflict with |
1463 | * anything else. | |
1464 | */ | |
ed6875e0 PS |
1465 | int |
1466 | cifs_rename_pending_delete(const char *full_path, struct dentry *dentry, | |
1467 | const unsigned int xid) | |
a12a1ac7 JL |
1468 | { |
1469 | int oplock = 0; | |
1470 | int rc; | |
d81b8a40 PS |
1471 | struct cifs_fid fid; |
1472 | struct cifs_open_parms oparms; | |
2b0143b5 | 1473 | struct inode *inode = d_inode(dentry); |
a12a1ac7 JL |
1474 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
1475 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 1476 | struct tcon_link *tlink; |
96daf2b0 | 1477 | struct cifs_tcon *tcon; |
3270958b SF |
1478 | __u32 dosattr, origattr; |
1479 | FILE_BASIC_INFO *info_buf = NULL; | |
a12a1ac7 | 1480 | |
7ffec372 JL |
1481 | tlink = cifs_sb_tlink(cifs_sb); |
1482 | if (IS_ERR(tlink)) | |
1483 | return PTR_ERR(tlink); | |
1484 | tcon = tlink_tcon(tlink); | |
1485 | ||
c483a984 SP |
1486 | /* |
1487 | * We cannot rename the file if the server doesn't support | |
1488 | * CAP_INFOLEVEL_PASSTHRU | |
1489 | */ | |
1490 | if (!(tcon->ses->capabilities & CAP_INFOLEVEL_PASSTHRU)) { | |
1491 | rc = -EBUSY; | |
1492 | goto out; | |
1493 | } | |
1494 | ||
d81b8a40 PS |
1495 | oparms.tcon = tcon; |
1496 | oparms.cifs_sb = cifs_sb; | |
1497 | oparms.desired_access = DELETE | FILE_WRITE_ATTRIBUTES; | |
0f060936 | 1498 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
1499 | oparms.disposition = FILE_OPEN; |
1500 | oparms.path = full_path; | |
1501 | oparms.fid = &fid; | |
1502 | oparms.reconnect = false; | |
1503 | ||
1504 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
a12a1ac7 JL |
1505 | if (rc != 0) |
1506 | goto out; | |
1507 | ||
3270958b SF |
1508 | origattr = cifsInode->cifsAttrs; |
1509 | if (origattr == 0) | |
1510 | origattr |= ATTR_NORMAL; | |
1511 | ||
1512 | dosattr = origattr & ~ATTR_READONLY; | |
a12a1ac7 JL |
1513 | if (dosattr == 0) |
1514 | dosattr |= ATTR_NORMAL; | |
1515 | dosattr |= ATTR_HIDDEN; | |
1516 | ||
3270958b SF |
1517 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
1518 | if (dosattr != origattr) { | |
1519 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); | |
1520 | if (info_buf == NULL) { | |
1521 | rc = -ENOMEM; | |
1522 | goto out_close; | |
1523 | } | |
1524 | info_buf->Attributes = cpu_to_le32(dosattr); | |
d81b8a40 | 1525 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1526 | current->tgid); |
1527 | /* although we would like to mark the file hidden | |
1528 | if that fails we will still try to rename it */ | |
72d282dc | 1529 | if (!rc) |
3270958b SF |
1530 | cifsInode->cifsAttrs = dosattr; |
1531 | else | |
1532 | dosattr = origattr; /* since not able to change them */ | |
a12a1ac7 | 1533 | } |
a12a1ac7 | 1534 | |
dd1db2de | 1535 | /* rename the file */ |
d81b8a40 PS |
1536 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, NULL, |
1537 | cifs_sb->local_nls, | |
2baa2682 | 1538 | cifs_remap(cifs_sb)); |
3270958b | 1539 | if (rc != 0) { |
47c78f4a | 1540 | rc = -EBUSY; |
3270958b SF |
1541 | goto undo_setattr; |
1542 | } | |
6d22f098 | 1543 | |
3270958b | 1544 | /* try to set DELETE_ON_CLOSE */ |
aff8d5ca | 1545 | if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) { |
d81b8a40 | 1546 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid, |
3270958b SF |
1547 | current->tgid); |
1548 | /* | |
1549 | * some samba versions return -ENOENT when we try to set the | |
1550 | * file disposition here. Likely a samba bug, but work around | |
1551 | * it for now. This means that some cifsXXX files may hang | |
1552 | * around after they shouldn't. | |
1553 | * | |
1554 | * BB: remove this hack after more servers have the fix | |
1555 | */ | |
1556 | if (rc == -ENOENT) | |
1557 | rc = 0; | |
1558 | else if (rc != 0) { | |
47c78f4a | 1559 | rc = -EBUSY; |
3270958b SF |
1560 | goto undo_rename; |
1561 | } | |
aff8d5ca | 1562 | set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags); |
3270958b | 1563 | } |
7ce86d5a | 1564 | |
a12a1ac7 | 1565 | out_close: |
d81b8a40 | 1566 | CIFSSMBClose(xid, tcon, fid.netfid); |
a12a1ac7 | 1567 | out: |
3270958b | 1568 | kfree(info_buf); |
7ffec372 | 1569 | cifs_put_tlink(tlink); |
a12a1ac7 | 1570 | return rc; |
3270958b SF |
1571 | |
1572 | /* | |
1573 | * reset everything back to the original state. Don't bother | |
1574 | * dealing with errors here since we can't do anything about | |
1575 | * them anyway. | |
1576 | */ | |
1577 | undo_rename: | |
d81b8a40 | 1578 | CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, dentry->d_name.name, |
2baa2682 | 1579 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
3270958b SF |
1580 | undo_setattr: |
1581 | if (dosattr != origattr) { | |
1582 | info_buf->Attributes = cpu_to_le32(origattr); | |
d81b8a40 | 1583 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, fid.netfid, |
3270958b SF |
1584 | current->tgid)) |
1585 | cifsInode->cifsAttrs = origattr; | |
1586 | } | |
1587 | ||
1588 | goto out_close; | |
a12a1ac7 JL |
1589 | } |
1590 | ||
b7ca6928 SF |
1591 | /* copied from fs/nfs/dir.c with small changes */ |
1592 | static void | |
1593 | cifs_drop_nlink(struct inode *inode) | |
1594 | { | |
1595 | spin_lock(&inode->i_lock); | |
1596 | if (inode->i_nlink > 0) | |
1597 | drop_nlink(inode); | |
1598 | spin_unlock(&inode->i_lock); | |
1599 | } | |
ff694527 SF |
1600 | |
1601 | /* | |
2b0143b5 | 1602 | * If d_inode(dentry) is null (usually meaning the cached dentry |
ff694527 | 1603 | * is a negative dentry) then we would attempt a standard SMB delete, but |
413d6100 CIK |
1604 | * if that fails we can not attempt the fall back mechanisms on EACCES |
1605 | * but will return the EACCES to the caller. Note that the VFS does not call | |
ff694527 SF |
1606 | * unlink on negative dentries currently. |
1607 | */ | |
5f0319a7 | 1608 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1609 | { |
1610 | int rc = 0; | |
6d5786a3 | 1611 | unsigned int xid; |
f6a9bc33 AV |
1612 | const char *full_path; |
1613 | void *page; | |
2b0143b5 | 1614 | struct inode *inode = d_inode(dentry); |
ff694527 | 1615 | struct cifsInodeInfo *cifs_inode; |
5f0319a7 JL |
1616 | struct super_block *sb = dir->i_sb; |
1617 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
7ffec372 | 1618 | struct tcon_link *tlink; |
96daf2b0 | 1619 | struct cifs_tcon *tcon; |
ed6875e0 | 1620 | struct TCP_Server_Info *server; |
6050247d SF |
1621 | struct iattr *attrs = NULL; |
1622 | __u32 dosattr = 0, origattr = 0; | |
1da177e4 | 1623 | |
f96637be | 1624 | cifs_dbg(FYI, "cifs_unlink, dir=0x%p, dentry=0x%p\n", dir, dentry); |
1da177e4 | 1625 | |
7ffec372 JL |
1626 | tlink = cifs_sb_tlink(cifs_sb); |
1627 | if (IS_ERR(tlink)) | |
1628 | return PTR_ERR(tlink); | |
1629 | tcon = tlink_tcon(tlink); | |
ed6875e0 | 1630 | server = tcon->ses->server; |
7ffec372 | 1631 | |
6d5786a3 | 1632 | xid = get_xid(); |
f6a9bc33 | 1633 | page = alloc_dentry_path(); |
1da177e4 | 1634 | |
82e9367c SF |
1635 | if (tcon->nodelete) { |
1636 | rc = -EACCES; | |
1637 | goto unlink_out; | |
1638 | } | |
1639 | ||
5f0319a7 JL |
1640 | /* Unlink can be called from rename so we can not take the |
1641 | * sb->s_vfs_rename_mutex here */ | |
f6a9bc33 AV |
1642 | full_path = build_path_from_dentry(dentry, page); |
1643 | if (IS_ERR(full_path)) { | |
1644 | rc = PTR_ERR(full_path); | |
7ffec372 | 1645 | goto unlink_out; |
1da177e4 | 1646 | } |
2d785a50 | 1647 | |
c3f207ab | 1648 | cifs_close_deferred_file(CIFS_I(inode)); |
29e20f9c PS |
1649 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1650 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
5f0319a7 | 1651 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
2d785a50 | 1652 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
2baa2682 | 1653 | cifs_remap(cifs_sb)); |
f96637be | 1654 | cifs_dbg(FYI, "posix del rc %d\n", rc); |
2d785a50 SF |
1655 | if ((rc == 0) || (rc == -ENOENT)) |
1656 | goto psx_del_no_retry; | |
1657 | } | |
1da177e4 | 1658 | |
6050247d | 1659 | retry_std_delete: |
ed6875e0 PS |
1660 | if (!server->ops->unlink) { |
1661 | rc = -ENOSYS; | |
1662 | goto psx_del_no_retry; | |
1663 | } | |
1664 | ||
1665 | rc = server->ops->unlink(xid, tcon, full_path, cifs_sb); | |
6050247d | 1666 | |
2d785a50 | 1667 | psx_del_no_retry: |
1da177e4 | 1668 | if (!rc) { |
5f0319a7 | 1669 | if (inode) |
b7ca6928 | 1670 | cifs_drop_nlink(inode); |
1da177e4 | 1671 | } else if (rc == -ENOENT) { |
5f0319a7 | 1672 | d_drop(dentry); |
47c78f4a | 1673 | } else if (rc == -EBUSY) { |
ed6875e0 PS |
1674 | if (server->ops->rename_pending_delete) { |
1675 | rc = server->ops->rename_pending_delete(full_path, | |
1676 | dentry, xid); | |
1677 | if (rc == 0) | |
1678 | cifs_drop_nlink(inode); | |
1679 | } | |
ff694527 | 1680 | } else if ((rc == -EACCES) && (dosattr == 0) && inode) { |
388e57b2 SF |
1681 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
1682 | if (attrs == NULL) { | |
1683 | rc = -ENOMEM; | |
1684 | goto out_reval; | |
1da177e4 | 1685 | } |
388e57b2 SF |
1686 | |
1687 | /* try to reset dos attributes */ | |
ff694527 SF |
1688 | cifs_inode = CIFS_I(inode); |
1689 | origattr = cifs_inode->cifsAttrs; | |
6050247d SF |
1690 | if (origattr == 0) |
1691 | origattr |= ATTR_NORMAL; | |
1692 | dosattr = origattr & ~ATTR_READONLY; | |
388e57b2 SF |
1693 | if (dosattr == 0) |
1694 | dosattr |= ATTR_NORMAL; | |
1695 | dosattr |= ATTR_HIDDEN; | |
1696 | ||
1697 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
388e57b2 SF |
1698 | if (rc != 0) |
1699 | goto out_reval; | |
6050247d SF |
1700 | |
1701 | goto retry_std_delete; | |
1da177e4 | 1702 | } |
6050247d SF |
1703 | |
1704 | /* undo the setattr if we errored out and it's needed */ | |
1705 | if (rc != 0 && dosattr != 0) | |
1706 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); | |
1707 | ||
388e57b2 | 1708 | out_reval: |
4523cc30 | 1709 | if (inode) { |
ff694527 SF |
1710 | cifs_inode = CIFS_I(inode); |
1711 | cifs_inode->time = 0; /* will force revalidate to get info | |
5f0319a7 | 1712 | when needed */ |
e37fea58 | 1713 | inode->i_ctime = current_time(inode); |
06bcfedd | 1714 | } |
e37fea58 | 1715 | dir->i_ctime = dir->i_mtime = current_time(dir); |
ff694527 | 1716 | cifs_inode = CIFS_I(dir); |
6050247d | 1717 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
7ffec372 | 1718 | unlink_out: |
f6a9bc33 | 1719 | free_dentry_path(page); |
6050247d | 1720 | kfree(attrs); |
6d5786a3 | 1721 | free_xid(xid); |
7ffec372 | 1722 | cifs_put_tlink(tlink); |
1da177e4 LT |
1723 | return rc; |
1724 | } | |
1725 | ||
ff691e96 | 1726 | static int |
101b92d9 | 1727 | cifs_mkdir_qinfo(struct inode *parent, struct dentry *dentry, umode_t mode, |
ff691e96 PS |
1728 | const char *full_path, struct cifs_sb_info *cifs_sb, |
1729 | struct cifs_tcon *tcon, const unsigned int xid) | |
1730 | { | |
1731 | int rc = 0; | |
101b92d9 | 1732 | struct inode *inode = NULL; |
ff691e96 | 1733 | |
d313852d SF |
1734 | if (tcon->posix_extensions) |
1735 | rc = smb311_posix_get_inode_info(&inode, full_path, parent->i_sb, xid); | |
1736 | else if (tcon->unix_ext) | |
101b92d9 | 1737 | rc = cifs_get_inode_info_unix(&inode, full_path, parent->i_sb, |
ff691e96 PS |
1738 | xid); |
1739 | else | |
101b92d9 JL |
1740 | rc = cifs_get_inode_info(&inode, full_path, NULL, parent->i_sb, |
1741 | xid, NULL); | |
1742 | ||
ff691e96 PS |
1743 | if (rc) |
1744 | return rc; | |
1745 | ||
ff691e96 PS |
1746 | /* |
1747 | * setting nlink not necessary except in cases where we failed to get it | |
101b92d9 JL |
1748 | * from the server or was set bogus. Also, since this is a brand new |
1749 | * inode, no need to grab the i_lock before setting the i_nlink. | |
ff691e96 | 1750 | */ |
101b92d9 JL |
1751 | if (inode->i_nlink < 2) |
1752 | set_nlink(inode, 2); | |
ff691e96 PS |
1753 | mode &= ~current_umask(); |
1754 | /* must turn on setgid bit if parent dir has it */ | |
101b92d9 | 1755 | if (parent->i_mode & S_ISGID) |
ff691e96 PS |
1756 | mode |= S_ISGID; |
1757 | ||
1758 | if (tcon->unix_ext) { | |
1759 | struct cifs_unix_set_info_args args = { | |
1760 | .mode = mode, | |
1761 | .ctime = NO_CHANGE_64, | |
1762 | .atime = NO_CHANGE_64, | |
1763 | .mtime = NO_CHANGE_64, | |
1764 | .device = 0, | |
1765 | }; | |
1766 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
49418b2c | 1767 | args.uid = current_fsuid(); |
101b92d9 | 1768 | if (parent->i_mode & S_ISGID) |
49418b2c | 1769 | args.gid = parent->i_gid; |
ff691e96 | 1770 | else |
49418b2c | 1771 | args.gid = current_fsgid(); |
ff691e96 | 1772 | } else { |
49418b2c EB |
1773 | args.uid = INVALID_UID; /* no change */ |
1774 | args.gid = INVALID_GID; /* no change */ | |
ff691e96 PS |
1775 | } |
1776 | CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args, | |
1777 | cifs_sb->local_nls, | |
2baa2682 | 1778 | cifs_remap(cifs_sb)); |
ff691e96 | 1779 | } else { |
f436720e | 1780 | struct TCP_Server_Info *server = tcon->ses->server; |
ff691e96 | 1781 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
f436720e | 1782 | (mode & S_IWUGO) == 0 && server->ops->mkdir_setinfo) |
101b92d9 | 1783 | server->ops->mkdir_setinfo(inode, full_path, cifs_sb, |
f436720e | 1784 | tcon, xid); |
101b92d9 JL |
1785 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
1786 | inode->i_mode = (mode | S_IFDIR); | |
1787 | ||
1788 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { | |
1789 | inode->i_uid = current_fsuid(); | |
1790 | if (inode->i_mode & S_ISGID) | |
1791 | inode->i_gid = parent->i_gid; | |
1792 | else | |
1793 | inode->i_gid = current_fsgid(); | |
ff691e96 PS |
1794 | } |
1795 | } | |
101b92d9 | 1796 | d_instantiate(dentry, inode); |
ff691e96 PS |
1797 | return rc; |
1798 | } | |
1799 | ||
1800 | static int | |
1801 | cifs_posix_mkdir(struct inode *inode, struct dentry *dentry, umode_t mode, | |
1802 | const char *full_path, struct cifs_sb_info *cifs_sb, | |
1803 | struct cifs_tcon *tcon, const unsigned int xid) | |
1804 | { | |
1805 | int rc = 0; | |
1806 | u32 oplock = 0; | |
1807 | FILE_UNIX_BASIC_INFO *info = NULL; | |
1808 | struct inode *newinode = NULL; | |
1809 | struct cifs_fattr fattr; | |
1810 | ||
1811 | info = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); | |
1812 | if (info == NULL) { | |
1813 | rc = -ENOMEM; | |
1814 | goto posix_mkdir_out; | |
1815 | } | |
1816 | ||
1817 | mode &= ~current_umask(); | |
1818 | rc = CIFSPOSIXCreate(xid, tcon, SMB_O_DIRECTORY | SMB_O_CREAT, mode, | |
1819 | NULL /* netfid */, info, &oplock, full_path, | |
2baa2682 | 1820 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
ff691e96 PS |
1821 | if (rc == -EOPNOTSUPP) |
1822 | goto posix_mkdir_out; | |
1823 | else if (rc) { | |
f96637be | 1824 | cifs_dbg(FYI, "posix mkdir returned 0x%x\n", rc); |
ff691e96 PS |
1825 | d_drop(dentry); |
1826 | goto posix_mkdir_out; | |
1827 | } | |
1828 | ||
1829 | if (info->Type == cpu_to_le32(-1)) | |
1830 | /* no return info, go query for it */ | |
1831 | goto posix_mkdir_get_info; | |
1832 | /* | |
1833 | * BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if | |
1834 | * need to set uid/gid. | |
1835 | */ | |
1836 | ||
1837 | cifs_unix_basic_to_fattr(&fattr, info, cifs_sb); | |
1838 | cifs_fill_uniqueid(inode->i_sb, &fattr); | |
1839 | newinode = cifs_iget(inode->i_sb, &fattr); | |
1840 | if (!newinode) | |
1841 | goto posix_mkdir_get_info; | |
1842 | ||
1843 | d_instantiate(dentry, newinode); | |
1844 | ||
1845 | #ifdef CONFIG_CIFS_DEBUG2 | |
35c265e0 AV |
1846 | cifs_dbg(FYI, "instantiated dentry %p %pd to inode %p\n", |
1847 | dentry, dentry, newinode); | |
ff691e96 PS |
1848 | |
1849 | if (newinode->i_nlink != 2) | |
f96637be JP |
1850 | cifs_dbg(FYI, "unexpected number of links %d\n", |
1851 | newinode->i_nlink); | |
ff691e96 PS |
1852 | #endif |
1853 | ||
1854 | posix_mkdir_out: | |
1855 | kfree(info); | |
1856 | return rc; | |
1857 | posix_mkdir_get_info: | |
1858 | rc = cifs_mkdir_qinfo(inode, dentry, mode, full_path, cifs_sb, tcon, | |
1859 | xid); | |
1860 | goto posix_mkdir_out; | |
1861 | } | |
1862 | ||
549c7297 CB |
1863 | int cifs_mkdir(struct user_namespace *mnt_userns, struct inode *inode, |
1864 | struct dentry *direntry, umode_t mode) | |
1da177e4 | 1865 | { |
ff691e96 | 1866 | int rc = 0; |
6d5786a3 | 1867 | unsigned int xid; |
1da177e4 | 1868 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1869 | struct tcon_link *tlink; |
29e20f9c | 1870 | struct cifs_tcon *tcon; |
f436720e | 1871 | struct TCP_Server_Info *server; |
8e33cf20 | 1872 | const char *full_path; |
f6a9bc33 | 1873 | void *page; |
1da177e4 | 1874 | |
f52aa79d | 1875 | cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n", |
f96637be | 1876 | mode, inode); |
1da177e4 | 1877 | |
1da177e4 | 1878 | cifs_sb = CIFS_SB(inode->i_sb); |
7ffec372 JL |
1879 | tlink = cifs_sb_tlink(cifs_sb); |
1880 | if (IS_ERR(tlink)) | |
1881 | return PTR_ERR(tlink); | |
29e20f9c | 1882 | tcon = tlink_tcon(tlink); |
7ffec372 | 1883 | |
6d5786a3 | 1884 | xid = get_xid(); |
1da177e4 | 1885 | |
f6a9bc33 AV |
1886 | page = alloc_dentry_path(); |
1887 | full_path = build_path_from_dentry(direntry, page); | |
1888 | if (IS_ERR(full_path)) { | |
1889 | rc = PTR_ERR(full_path); | |
7ffec372 | 1890 | goto mkdir_out; |
1da177e4 | 1891 | } |
50c2f753 | 1892 | |
bea851b8 SF |
1893 | server = tcon->ses->server; |
1894 | ||
bea851b8 SF |
1895 | if ((server->ops->posix_mkdir) && (tcon->posix_extensions)) { |
1896 | rc = server->ops->posix_mkdir(xid, inode, mode, tcon, full_path, | |
1897 | cifs_sb); | |
1898 | d_drop(direntry); /* for time being always refresh inode info */ | |
1899 | goto mkdir_out; | |
1900 | } | |
bea851b8 | 1901 | |
29e20f9c PS |
1902 | if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
1903 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { | |
ff691e96 PS |
1904 | rc = cifs_posix_mkdir(inode, direntry, mode, full_path, cifs_sb, |
1905 | tcon, xid); | |
1906 | if (rc != -EOPNOTSUPP) | |
2dd29d31 | 1907 | goto mkdir_out; |
fb8c4b14 | 1908 | } |
ff691e96 | 1909 | |
f436720e PS |
1910 | if (!server->ops->mkdir) { |
1911 | rc = -ENOSYS; | |
1912 | goto mkdir_out; | |
1913 | } | |
1914 | ||
1da177e4 | 1915 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
c3ca78e2 | 1916 | rc = server->ops->mkdir(xid, inode, mode, tcon, full_path, cifs_sb); |
1da177e4 | 1917 | if (rc) { |
f96637be | 1918 | cifs_dbg(FYI, "cifs_mkdir returned 0x%x\n", rc); |
1da177e4 | 1919 | d_drop(direntry); |
ff691e96 | 1920 | goto mkdir_out; |
1da177e4 | 1921 | } |
ff691e96 | 1922 | |
c3ca78e2 | 1923 | /* TODO: skip this for smb2/smb3 */ |
ff691e96 PS |
1924 | rc = cifs_mkdir_qinfo(inode, direntry, mode, full_path, cifs_sb, tcon, |
1925 | xid); | |
fb8c4b14 | 1926 | mkdir_out: |
6de2ce42 PS |
1927 | /* |
1928 | * Force revalidate to get parent dir info when needed since cached | |
1929 | * attributes are invalid now. | |
1930 | */ | |
1931 | CIFS_I(inode)->time = 0; | |
f6a9bc33 | 1932 | free_dentry_path(page); |
6d5786a3 | 1933 | free_xid(xid); |
7ffec372 | 1934 | cifs_put_tlink(tlink); |
1da177e4 LT |
1935 | return rc; |
1936 | } | |
1937 | ||
1938 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) | |
1939 | { | |
1940 | int rc = 0; | |
6d5786a3 | 1941 | unsigned int xid; |
1da177e4 | 1942 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 1943 | struct tcon_link *tlink; |
f958ca5d PS |
1944 | struct cifs_tcon *tcon; |
1945 | struct TCP_Server_Info *server; | |
f6a9bc33 AV |
1946 | const char *full_path; |
1947 | void *page = alloc_dentry_path(); | |
1da177e4 LT |
1948 | struct cifsInodeInfo *cifsInode; |
1949 | ||
f96637be | 1950 | cifs_dbg(FYI, "cifs_rmdir, inode = 0x%p\n", inode); |
1da177e4 | 1951 | |
6d5786a3 | 1952 | xid = get_xid(); |
1da177e4 | 1953 | |
f6a9bc33 AV |
1954 | full_path = build_path_from_dentry(direntry, page); |
1955 | if (IS_ERR(full_path)) { | |
1956 | rc = PTR_ERR(full_path); | |
7ffec372 | 1957 | goto rmdir_exit; |
1da177e4 LT |
1958 | } |
1959 | ||
7ffec372 JL |
1960 | cifs_sb = CIFS_SB(inode->i_sb); |
1961 | tlink = cifs_sb_tlink(cifs_sb); | |
1962 | if (IS_ERR(tlink)) { | |
1963 | rc = PTR_ERR(tlink); | |
1964 | goto rmdir_exit; | |
1965 | } | |
f958ca5d PS |
1966 | tcon = tlink_tcon(tlink); |
1967 | server = tcon->ses->server; | |
1968 | ||
1969 | if (!server->ops->rmdir) { | |
1970 | rc = -ENOSYS; | |
1971 | cifs_put_tlink(tlink); | |
1972 | goto rmdir_exit; | |
1973 | } | |
7ffec372 | 1974 | |
82e9367c SF |
1975 | if (tcon->nodelete) { |
1976 | rc = -EACCES; | |
1977 | cifs_put_tlink(tlink); | |
1978 | goto rmdir_exit; | |
1979 | } | |
1980 | ||
f958ca5d | 1981 | rc = server->ops->rmdir(xid, tcon, full_path, cifs_sb); |
7ffec372 | 1982 | cifs_put_tlink(tlink); |
1da177e4 LT |
1983 | |
1984 | if (!rc) { | |
2b0143b5 DH |
1985 | spin_lock(&d_inode(direntry)->i_lock); |
1986 | i_size_write(d_inode(direntry), 0); | |
1987 | clear_nlink(d_inode(direntry)); | |
1988 | spin_unlock(&d_inode(direntry)->i_lock); | |
1da177e4 LT |
1989 | } |
1990 | ||
2b0143b5 | 1991 | cifsInode = CIFS_I(d_inode(direntry)); |
6de2ce42 PS |
1992 | /* force revalidate to go get info when needed */ |
1993 | cifsInode->time = 0; | |
42c24544 SF |
1994 | |
1995 | cifsInode = CIFS_I(inode); | |
6de2ce42 PS |
1996 | /* |
1997 | * Force revalidate to get parent dir info when needed since cached | |
1998 | * attributes are invalid now. | |
1999 | */ | |
2000 | cifsInode->time = 0; | |
42c24544 | 2001 | |
2b0143b5 | 2002 | d_inode(direntry)->i_ctime = inode->i_ctime = inode->i_mtime = |
e37fea58 | 2003 | current_time(inode); |
1da177e4 | 2004 | |
7ffec372 | 2005 | rmdir_exit: |
f6a9bc33 | 2006 | free_dentry_path(page); |
6d5786a3 | 2007 | free_xid(xid); |
1da177e4 LT |
2008 | return rc; |
2009 | } | |
2010 | ||
ee2fd967 | 2011 | static int |
8ceb9843 PS |
2012 | cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, |
2013 | const char *from_path, struct dentry *to_dentry, | |
2014 | const char *to_path) | |
ee2fd967 SF |
2015 | { |
2016 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); | |
7ffec372 | 2017 | struct tcon_link *tlink; |
8ceb9843 PS |
2018 | struct cifs_tcon *tcon; |
2019 | struct TCP_Server_Info *server; | |
d81b8a40 PS |
2020 | struct cifs_fid fid; |
2021 | struct cifs_open_parms oparms; | |
ee2fd967 SF |
2022 | int oplock, rc; |
2023 | ||
7ffec372 JL |
2024 | tlink = cifs_sb_tlink(cifs_sb); |
2025 | if (IS_ERR(tlink)) | |
2026 | return PTR_ERR(tlink); | |
8ceb9843 PS |
2027 | tcon = tlink_tcon(tlink); |
2028 | server = tcon->ses->server; | |
2029 | ||
2030 | if (!server->ops->rename) | |
2031 | return -ENOSYS; | |
7ffec372 | 2032 | |
ee2fd967 | 2033 | /* try path-based rename first */ |
8ceb9843 | 2034 | rc = server->ops->rename(xid, tcon, from_path, to_path, cifs_sb); |
ee2fd967 SF |
2035 | |
2036 | /* | |
8ceb9843 PS |
2037 | * Don't bother with rename by filehandle unless file is busy and |
2038 | * source. Note that cross directory moves do not work with | |
ee2fd967 SF |
2039 | * rename by filehandle to various Windows servers. |
2040 | */ | |
47c78f4a | 2041 | if (rc == 0 || rc != -EBUSY) |
7ffec372 | 2042 | goto do_rename_exit; |
ee2fd967 | 2043 | |
652727bb FS |
2044 | /* Don't fall back to using SMB on SMB 2+ mount */ |
2045 | if (server->vals->protocol_id != 0) | |
2046 | goto do_rename_exit; | |
2047 | ||
ed0e3ace JL |
2048 | /* open-file renames don't work across directories */ |
2049 | if (to_dentry->d_parent != from_dentry->d_parent) | |
7ffec372 | 2050 | goto do_rename_exit; |
ed0e3ace | 2051 | |
d81b8a40 PS |
2052 | oparms.tcon = tcon; |
2053 | oparms.cifs_sb = cifs_sb; | |
ee2fd967 | 2054 | /* open the file to be renamed -- we need DELETE perms */ |
d81b8a40 | 2055 | oparms.desired_access = DELETE; |
0f060936 | 2056 | oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR); |
d81b8a40 PS |
2057 | oparms.disposition = FILE_OPEN; |
2058 | oparms.path = from_path; | |
2059 | oparms.fid = &fid; | |
2060 | oparms.reconnect = false; | |
2061 | ||
2062 | rc = CIFS_open(xid, &oparms, &oplock, NULL); | |
ee2fd967 | 2063 | if (rc == 0) { |
d81b8a40 | 2064 | rc = CIFSSMBRenameOpenFile(xid, tcon, fid.netfid, |
ee2fd967 | 2065 | (const char *) to_dentry->d_name.name, |
2baa2682 | 2066 | cifs_sb->local_nls, cifs_remap(cifs_sb)); |
d81b8a40 | 2067 | CIFSSMBClose(xid, tcon, fid.netfid); |
ee2fd967 | 2068 | } |
7ffec372 | 2069 | do_rename_exit: |
c7e9f78f SF |
2070 | if (rc == 0) |
2071 | d_move(from_dentry, to_dentry); | |
7ffec372 | 2072 | cifs_put_tlink(tlink); |
ee2fd967 SF |
2073 | return rc; |
2074 | } | |
2075 | ||
8ceb9843 | 2076 | int |
549c7297 CB |
2077 | cifs_rename2(struct user_namespace *mnt_userns, struct inode *source_dir, |
2078 | struct dentry *source_dentry, struct inode *target_dir, | |
2079 | struct dentry *target_dentry, unsigned int flags) | |
1da177e4 | 2080 | { |
f6a9bc33 AV |
2081 | const char *from_name, *to_name; |
2082 | void *page1, *page2; | |
639e7a91 | 2083 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 2084 | struct tcon_link *tlink; |
96daf2b0 | 2085 | struct cifs_tcon *tcon; |
ee2fd967 SF |
2086 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
2087 | FILE_UNIX_BASIC_INFO *info_buf_target; | |
6d5786a3 PS |
2088 | unsigned int xid; |
2089 | int rc, tmprc; | |
1da177e4 | 2090 | |
7c33d597 MS |
2091 | if (flags & ~RENAME_NOREPLACE) |
2092 | return -EINVAL; | |
2093 | ||
639e7a91 | 2094 | cifs_sb = CIFS_SB(source_dir->i_sb); |
7ffec372 JL |
2095 | tlink = cifs_sb_tlink(cifs_sb); |
2096 | if (IS_ERR(tlink)) | |
2097 | return PTR_ERR(tlink); | |
2098 | tcon = tlink_tcon(tlink); | |
1da177e4 | 2099 | |
f6a9bc33 AV |
2100 | page1 = alloc_dentry_path(); |
2101 | page2 = alloc_dentry_path(); | |
6d5786a3 | 2102 | xid = get_xid(); |
ee2fd967 | 2103 | |
f6a9bc33 AV |
2104 | from_name = build_path_from_dentry(source_dentry, page1); |
2105 | if (IS_ERR(from_name)) { | |
2106 | rc = PTR_ERR(from_name); | |
ee2fd967 SF |
2107 | goto cifs_rename_exit; |
2108 | } | |
2109 | ||
f6a9bc33 AV |
2110 | to_name = build_path_from_dentry(target_dentry, page2); |
2111 | if (IS_ERR(to_name)) { | |
2112 | rc = PTR_ERR(to_name); | |
1da177e4 LT |
2113 | goto cifs_rename_exit; |
2114 | } | |
2115 | ||
8ceb9843 PS |
2116 | rc = cifs_do_rename(xid, source_dentry, from_name, target_dentry, |
2117 | to_name); | |
ee2fd967 | 2118 | |
7c33d597 MS |
2119 | /* |
2120 | * No-replace is the natural behavior for CIFS, so skip unlink hacks. | |
2121 | */ | |
2122 | if (flags & RENAME_NOREPLACE) | |
2123 | goto cifs_rename_exit; | |
2124 | ||
14121bdc JL |
2125 | if (rc == -EEXIST && tcon->unix_ext) { |
2126 | /* | |
8ceb9843 PS |
2127 | * Are src and dst hardlinks of same inode? We can only tell |
2128 | * with unix extensions enabled. | |
14121bdc JL |
2129 | */ |
2130 | info_buf_source = | |
6da2ec56 | 2131 | kmalloc_array(2, sizeof(FILE_UNIX_BASIC_INFO), |
14121bdc JL |
2132 | GFP_KERNEL); |
2133 | if (info_buf_source == NULL) { | |
2134 | rc = -ENOMEM; | |
2135 | goto cifs_rename_exit; | |
2136 | } | |
2137 | ||
2138 | info_buf_target = info_buf_source + 1; | |
8ceb9843 PS |
2139 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, from_name, |
2140 | info_buf_source, | |
2141 | cifs_sb->local_nls, | |
2baa2682 | 2142 | cifs_remap(cifs_sb)); |
8d281efb | 2143 | if (tmprc != 0) |
14121bdc | 2144 | goto unlink_target; |
ee2fd967 | 2145 | |
8ceb9843 PS |
2146 | tmprc = CIFSSMBUnixQPathInfo(xid, tcon, to_name, |
2147 | info_buf_target, | |
2148 | cifs_sb->local_nls, | |
2baa2682 | 2149 | cifs_remap(cifs_sb)); |
14121bdc | 2150 | |
8d281efb | 2151 | if (tmprc == 0 && (info_buf_source->UniqueId == |
ae6884a9 | 2152 | info_buf_target->UniqueId)) { |
14121bdc | 2153 | /* same file, POSIX says that this is a noop */ |
ae6884a9 | 2154 | rc = 0; |
14121bdc | 2155 | goto cifs_rename_exit; |
ae6884a9 | 2156 | } |
8ceb9843 PS |
2157 | } |
2158 | /* | |
2159 | * else ... BB we could add the same check for Windows by | |
2160 | * checking the UniqueId via FILE_INTERNAL_INFO | |
2161 | */ | |
14121bdc | 2162 | |
ee2fd967 | 2163 | unlink_target: |
0e670518 SF |
2164 | /* Try unlinking the target dentry if it's not negative */ |
2165 | if (d_really_is_positive(target_dentry) && (rc == -EACCES || rc == -EEXIST)) { | |
a07d3220 PS |
2166 | if (d_is_dir(target_dentry)) |
2167 | tmprc = cifs_rmdir(target_dir, target_dentry); | |
2168 | else | |
2169 | tmprc = cifs_unlink(target_dir, target_dentry); | |
14121bdc JL |
2170 | if (tmprc) |
2171 | goto cifs_rename_exit; | |
8ceb9843 PS |
2172 | rc = cifs_do_rename(xid, source_dentry, from_name, |
2173 | target_dentry, to_name); | |
1da177e4 LT |
2174 | } |
2175 | ||
b46799a8 PS |
2176 | /* force revalidate to go get info when needed */ |
2177 | CIFS_I(source_dir)->time = CIFS_I(target_dir)->time = 0; | |
2178 | ||
2179 | source_dir->i_ctime = source_dir->i_mtime = target_dir->i_ctime = | |
e37fea58 | 2180 | target_dir->i_mtime = current_time(source_dir); |
b46799a8 | 2181 | |
1da177e4 | 2182 | cifs_rename_exit: |
ee2fd967 | 2183 | kfree(info_buf_source); |
f6a9bc33 AV |
2184 | free_dentry_path(page2); |
2185 | free_dentry_path(page1); | |
6d5786a3 | 2186 | free_xid(xid); |
7ffec372 | 2187 | cifs_put_tlink(tlink); |
1da177e4 LT |
2188 | return rc; |
2189 | } | |
2190 | ||
df2cf170 | 2191 | static bool |
ed8561fa | 2192 | cifs_dentry_needs_reval(struct dentry *dentry) |
1da177e4 | 2193 | { |
ed8561fa | 2194 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2195 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
6d20e840 | 2196 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
f6d2353a RS |
2197 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2198 | struct cached_fid *cfid = NULL; | |
1da177e4 | 2199 | |
57c55cd7 RS |
2200 | if (cifs_i->time == 0) |
2201 | return true; | |
2202 | ||
18cceb6a | 2203 | if (CIFS_CACHE_READ(cifs_i)) |
df2cf170 | 2204 | return false; |
1da177e4 | 2205 | |
df2cf170 JL |
2206 | if (!lookupCacheEnabled) |
2207 | return true; | |
1da177e4 | 2208 | |
f6d2353a RS |
2209 | if (!open_cached_dir_by_dentry(tcon, dentry->d_parent, &cfid)) { |
2210 | mutex_lock(&cfid->fid_mutex); | |
2211 | if (cfid->time && cifs_i->time > cfid->time) { | |
2212 | mutex_unlock(&cfid->fid_mutex); | |
2213 | close_cached_dir(cfid); | |
2214 | return false; | |
2215 | } | |
2216 | mutex_unlock(&cfid->fid_mutex); | |
2217 | close_cached_dir(cfid); | |
2218 | } | |
ddaf6d4a SF |
2219 | /* |
2220 | * depending on inode type, check if attribute caching disabled for | |
2221 | * files or directories | |
2222 | */ | |
2223 | if (S_ISDIR(inode->i_mode)) { | |
2224 | if (!cifs_sb->ctx->acdirmax) | |
2225 | return true; | |
2226 | if (!time_in_range(jiffies, cifs_i->time, | |
2227 | cifs_i->time + cifs_sb->ctx->acdirmax)) | |
2228 | return true; | |
2229 | } else { /* file */ | |
57804646 | 2230 | if (!cifs_sb->ctx->acregmax) |
ddaf6d4a SF |
2231 | return true; |
2232 | if (!time_in_range(jiffies, cifs_i->time, | |
57804646 | 2233 | cifs_i->time + cifs_sb->ctx->acregmax)) |
ddaf6d4a SF |
2234 | return true; |
2235 | } | |
df2cf170 | 2236 | |
db19272e | 2237 | /* hardlinked files w/ noserverino get "special" treatment */ |
6d20e840 | 2238 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) && |
db19272e JL |
2239 | S_ISREG(inode->i_mode) && inode->i_nlink != 1) |
2240 | return true; | |
2241 | ||
df2cf170 JL |
2242 | return false; |
2243 | } | |
2244 | ||
523fb8c8 SJ |
2245 | /* |
2246 | * Zap the cache. Called when invalid_mapping flag is set. | |
2247 | */ | |
6feb9891 | 2248 | int |
df2cf170 JL |
2249 | cifs_invalidate_mapping(struct inode *inode) |
2250 | { | |
6feb9891 | 2251 | int rc = 0; |
df2cf170 | 2252 | |
df2cf170 | 2253 | if (inode->i_mapping && inode->i_mapping->nrpages != 0) { |
257fb1f1 | 2254 | rc = invalidate_inode_pages2(inode->i_mapping); |
4f73c7d3 | 2255 | if (rc) |
a0a3036b | 2256 | cifs_dbg(VFS, "%s: Could not invalidate inode %p\n", |
f96637be | 2257 | __func__, inode); |
df2cf170 | 2258 | } |
257fb1f1 | 2259 | |
9451a9a5 | 2260 | cifs_fscache_reset_inode_cookie(inode); |
6feb9891 | 2261 | return rc; |
df2cf170 JL |
2262 | } |
2263 | ||
4f73c7d3 JL |
2264 | /** |
2265 | * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks | |
607dfc79 SF |
2266 | * |
2267 | * @key: currently unused | |
2268 | * @mode: the task state to sleep in | |
4f73c7d3 JL |
2269 | */ |
2270 | static int | |
dfd01f02 | 2271 | cifs_wait_bit_killable(struct wait_bit_key *key, int mode) |
4f73c7d3 | 2272 | { |
4f73c7d3 | 2273 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
2274 | if (signal_pending_state(mode, current)) |
2275 | return -ERESTARTSYS; | |
4f73c7d3 JL |
2276 | return 0; |
2277 | } | |
2278 | ||
e284e53f JL |
2279 | int |
2280 | cifs_revalidate_mapping(struct inode *inode) | |
2281 | { | |
4f73c7d3 JL |
2282 | int rc; |
2283 | unsigned long *flags = &CIFS_I(inode)->flags; | |
2284 | ||
4e8aea30 SF |
2285 | /* swapfiles are not supposed to be shared */ |
2286 | if (IS_SWAPFILE(inode)) | |
2287 | return 0; | |
2288 | ||
74316201 N |
2289 | rc = wait_on_bit_lock_action(flags, CIFS_INO_LOCK, cifs_wait_bit_killable, |
2290 | TASK_KILLABLE); | |
4f73c7d3 JL |
2291 | if (rc) |
2292 | return rc; | |
2293 | ||
2294 | if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) { | |
2295 | rc = cifs_invalidate_mapping(inode); | |
2296 | if (rc) | |
2297 | set_bit(CIFS_INO_INVALID_MAPPING, flags); | |
2298 | } | |
2299 | ||
2300 | clear_bit_unlock(CIFS_INO_LOCK, flags); | |
b1cce803 | 2301 | smp_mb__after_atomic(); |
4f73c7d3 JL |
2302 | wake_up_bit(flags, CIFS_INO_LOCK); |
2303 | ||
2304 | return rc; | |
2305 | } | |
2306 | ||
2307 | int | |
2308 | cifs_zap_mapping(struct inode *inode) | |
2309 | { | |
2310 | set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags); | |
2311 | return cifs_revalidate_mapping(inode); | |
e284e53f JL |
2312 | } |
2313 | ||
6feb9891 | 2314 | int cifs_revalidate_file_attr(struct file *filp) |
abab095d JL |
2315 | { |
2316 | int rc = 0; | |
ed8561fa | 2317 | struct dentry *dentry = file_dentry(filp); |
ba00ba64 | 2318 | struct cifsFileInfo *cfile = (struct cifsFileInfo *) filp->private_data; |
abab095d | 2319 | |
ed8561fa | 2320 | if (!cifs_dentry_needs_reval(dentry)) |
6feb9891 | 2321 | return rc; |
abab095d | 2322 | |
13cfb733 | 2323 | if (tlink_tcon(cfile->tlink)->unix_ext) |
abab095d JL |
2324 | rc = cifs_get_file_info_unix(filp); |
2325 | else | |
2326 | rc = cifs_get_file_info(filp); | |
2327 | ||
abab095d JL |
2328 | return rc; |
2329 | } | |
2330 | ||
6feb9891 | 2331 | int cifs_revalidate_dentry_attr(struct dentry *dentry) |
df2cf170 | 2332 | { |
6d5786a3 | 2333 | unsigned int xid; |
df2cf170 | 2334 | int rc = 0; |
2b0143b5 | 2335 | struct inode *inode = d_inode(dentry); |
df2cf170 | 2336 | struct super_block *sb = dentry->d_sb; |
f6a9bc33 AV |
2337 | const char *full_path; |
2338 | void *page; | |
fc513fac | 2339 | int count = 0; |
df2cf170 JL |
2340 | |
2341 | if (inode == NULL) | |
2342 | return -ENOENT; | |
1da177e4 | 2343 | |
ed8561fa | 2344 | if (!cifs_dentry_needs_reval(dentry)) |
6feb9891 PS |
2345 | return rc; |
2346 | ||
6d5786a3 | 2347 | xid = get_xid(); |
1da177e4 | 2348 | |
f6a9bc33 AV |
2349 | page = alloc_dentry_path(); |
2350 | full_path = build_path_from_dentry(dentry, page); | |
2351 | if (IS_ERR(full_path)) { | |
2352 | rc = PTR_ERR(full_path); | |
6feb9891 | 2353 | goto out; |
1da177e4 LT |
2354 | } |
2355 | ||
f96637be JP |
2356 | cifs_dbg(FYI, "Update attributes: %s inode 0x%p count %d dentry: 0x%p d_time %ld jiffies %ld\n", |
2357 | full_path, inode, inode->i_count.counter, | |
a00be0e3 | 2358 | dentry, cifs_get_time(dentry), jiffies); |
1da177e4 | 2359 | |
fc513fac | 2360 | again: |
6a5f6592 SF |
2361 | if (cifs_sb_master_tcon(CIFS_SB(sb))->posix_extensions) |
2362 | rc = smb311_posix_get_inode_info(&inode, full_path, sb, xid); | |
2363 | else if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext) | |
df2cf170 JL |
2364 | rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid); |
2365 | else | |
2366 | rc = cifs_get_inode_info(&inode, full_path, NULL, sb, | |
2367 | xid, NULL); | |
fc513fac RS |
2368 | if (rc == -EAGAIN && count++ < 10) |
2369 | goto again; | |
6feb9891 | 2370 | out: |
f6a9bc33 | 2371 | free_dentry_path(page); |
6d5786a3 | 2372 | free_xid(xid); |
fc513fac | 2373 | |
1da177e4 LT |
2374 | return rc; |
2375 | } | |
2376 | ||
6feb9891 PS |
2377 | int cifs_revalidate_file(struct file *filp) |
2378 | { | |
2379 | int rc; | |
496ad9aa | 2380 | struct inode *inode = file_inode(filp); |
6feb9891 PS |
2381 | |
2382 | rc = cifs_revalidate_file_attr(filp); | |
2383 | if (rc) | |
2384 | return rc; | |
2385 | ||
e284e53f | 2386 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2387 | } |
2388 | ||
2389 | /* revalidate a dentry's inode attributes */ | |
2390 | int cifs_revalidate_dentry(struct dentry *dentry) | |
2391 | { | |
2392 | int rc; | |
2b0143b5 | 2393 | struct inode *inode = d_inode(dentry); |
6feb9891 PS |
2394 | |
2395 | rc = cifs_revalidate_dentry_attr(dentry); | |
2396 | if (rc) | |
2397 | return rc; | |
2398 | ||
e284e53f | 2399 | return cifs_revalidate_mapping(inode); |
6feb9891 PS |
2400 | } |
2401 | ||
549c7297 CB |
2402 | int cifs_getattr(struct user_namespace *mnt_userns, const struct path *path, |
2403 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
1da177e4 | 2404 | { |
a528d35e | 2405 | struct dentry *dentry = path->dentry; |
3aa1c8c2 | 2406 | struct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb); |
96daf2b0 | 2407 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
2b0143b5 | 2408 | struct inode *inode = d_inode(dentry); |
6feb9891 | 2409 | int rc; |
3aa1c8c2 | 2410 | |
6feb9891 PS |
2411 | /* |
2412 | * We need to be sure that all dirty pages are written and the server | |
2413 | * has actual ctime, mtime and file length. | |
2414 | */ | |
65af8f01 | 2415 | if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_SIZE | STATX_BLOCKS)) && |
ffdec8d6 SF |
2416 | !CIFS_CACHE_READ(CIFS_I(inode)) && |
2417 | inode->i_mapping && inode->i_mapping->nrpages != 0) { | |
6feb9891 | 2418 | rc = filemap_fdatawait(inode->i_mapping); |
156ecb2d SF |
2419 | if (rc) { |
2420 | mapping_set_error(inode->i_mapping, rc); | |
2421 | return rc; | |
2422 | } | |
6feb9891 | 2423 | } |
1c456013 | 2424 | |
ffdec8d6 SF |
2425 | if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_FORCE_SYNC) |
2426 | CIFS_I(inode)->time = 0; /* force revalidate */ | |
2427 | ||
2428 | /* | |
2429 | * If the caller doesn't require syncing, only sync if | |
2430 | * necessary (e.g. due to earlier truncate or setattr | |
2431 | * invalidating the cached metadata) | |
2432 | */ | |
2433 | if (((flags & AT_STATX_SYNC_TYPE) != AT_STATX_DONT_SYNC) || | |
2434 | (CIFS_I(inode)->time == 0)) { | |
2435 | rc = cifs_revalidate_dentry_attr(dentry); | |
2436 | if (rc) | |
2437 | return rc; | |
2438 | } | |
6feb9891 | 2439 | |
0d56a451 | 2440 | generic_fillattr(&init_user_ns, inode, stat); |
522aa3b5 | 2441 | stat->blksize = cifs_sb->ctx->bsize; |
6feb9891 PS |
2442 | stat->ino = CIFS_I(inode)->uniqueid; |
2443 | ||
6e70e26d SF |
2444 | /* old CIFS Unix Extensions doesn't return create time */ |
2445 | if (CIFS_I(inode)->createtime) { | |
2446 | stat->result_mask |= STATX_BTIME; | |
95390201 AB |
2447 | stat->btime = |
2448 | cifs_NTtimeToUnix(cpu_to_le64(CIFS_I(inode)->createtime)); | |
6e70e26d SF |
2449 | } |
2450 | ||
2451 | stat->attributes_mask |= (STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED); | |
2452 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_COMPRESSED) | |
2453 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
2454 | if (CIFS_I(inode)->cifsAttrs & FILE_ATTRIBUTE_ENCRYPTED) | |
2455 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
2456 | ||
6feb9891 | 2457 | /* |
d3d1fce1 JL |
2458 | * If on a multiuser mount without unix extensions or cifsacl being |
2459 | * enabled, and the admin hasn't overridden them, set the ownership | |
2460 | * to the fsuid/fsgid of the current process. | |
6feb9891 PS |
2461 | */ |
2462 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) && | |
d3d1fce1 | 2463 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
6feb9891 PS |
2464 | !tcon->unix_ext) { |
2465 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)) | |
2466 | stat->uid = current_fsuid(); | |
2467 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)) | |
2468 | stat->gid = current_fsgid(); | |
5fe14c85 | 2469 | } |
39946886 | 2470 | return 0; |
1da177e4 LT |
2471 | } |
2472 | ||
2f3ebaba RS |
2473 | int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, |
2474 | u64 len) | |
2475 | { | |
2476 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); | |
2477 | struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb); | |
2478 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); | |
2479 | struct TCP_Server_Info *server = tcon->ses->server; | |
2480 | struct cifsFileInfo *cfile; | |
2481 | int rc; | |
2482 | ||
2483 | /* | |
2484 | * We need to be sure that all dirty pages are written as they | |
2485 | * might fill holes on the server. | |
2486 | */ | |
2487 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && | |
2488 | inode->i_mapping->nrpages != 0) { | |
2489 | rc = filemap_fdatawait(inode->i_mapping); | |
2490 | if (rc) { | |
2491 | mapping_set_error(inode->i_mapping, rc); | |
2492 | return rc; | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | cfile = find_readable_file(cifs_i, false); | |
2497 | if (cfile == NULL) | |
2498 | return -EINVAL; | |
2499 | ||
2500 | if (server->ops->fiemap) { | |
2501 | rc = server->ops->fiemap(tcon, cfile, fei, start, len); | |
2502 | cifsFileInfo_put(cfile); | |
2503 | return rc; | |
2504 | } | |
2505 | ||
2506 | cifsFileInfo_put(cfile); | |
2507 | return -ENOTSUPP; | |
2508 | } | |
2509 | ||
8bd0d701 | 2510 | int cifs_truncate_page(struct address_space *mapping, loff_t from) |
1da177e4 | 2511 | { |
09cbfeaf KS |
2512 | pgoff_t index = from >> PAGE_SHIFT; |
2513 | unsigned offset = from & (PAGE_SIZE - 1); | |
1da177e4 | 2514 | struct page *page; |
1da177e4 LT |
2515 | int rc = 0; |
2516 | ||
2517 | page = grab_cache_page(mapping, index); | |
2518 | if (!page) | |
2519 | return -ENOMEM; | |
2520 | ||
09cbfeaf | 2521 | zero_user_segment(page, offset, PAGE_SIZE); |
1da177e4 | 2522 | unlock_page(page); |
09cbfeaf | 2523 | put_page(page); |
1da177e4 LT |
2524 | return rc; |
2525 | } | |
2526 | ||
8bd0d701 | 2527 | void cifs_setsize(struct inode *inode, loff_t offset) |
3677db10 | 2528 | { |
57c55cd7 RS |
2529 | struct cifsInodeInfo *cifs_i = CIFS_I(inode); |
2530 | ||
ba6a46a0 | 2531 | spin_lock(&inode->i_lock); |
3677db10 | 2532 | i_size_write(inode, offset); |
ba6a46a0 | 2533 | spin_unlock(&inode->i_lock); |
1b947463 | 2534 | |
57c55cd7 RS |
2535 | /* Cached inode must be refreshed on truncate */ |
2536 | cifs_i->time = 0; | |
7caef267 | 2537 | truncate_pagecache(inode, offset); |
3677db10 SF |
2538 | } |
2539 | ||
8efdbde6 JL |
2540 | static int |
2541 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, | |
f6f1f179 | 2542 | unsigned int xid, const char *full_path) |
8efdbde6 JL |
2543 | { |
2544 | int rc; | |
2545 | struct cifsFileInfo *open_file; | |
2546 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); | |
2547 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2548 | struct tcon_link *tlink = NULL; |
d1433418 PS |
2549 | struct cifs_tcon *tcon = NULL; |
2550 | struct TCP_Server_Info *server; | |
8efdbde6 JL |
2551 | |
2552 | /* | |
2553 | * To avoid spurious oplock breaks from server, in the case of | |
2554 | * inodes that we already have open, avoid doing path based | |
2555 | * setting of file size if we can do it by handle. | |
2556 | * This keeps our caching token (oplock) and avoids timeouts | |
2557 | * when the local oplock break takes longer to flush | |
2558 | * writebehind data than the SMB timeout for the SetPathInfo | |
2559 | * request would allow | |
2560 | */ | |
86f740f2 | 2561 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
8efdbde6 | 2562 | if (open_file) { |
d1433418 PS |
2563 | tcon = tlink_tcon(open_file->tlink); |
2564 | server = tcon->ses->server; | |
2565 | if (server->ops->set_file_size) | |
2566 | rc = server->ops->set_file_size(xid, tcon, open_file, | |
2567 | attrs->ia_size, false); | |
2568 | else | |
2569 | rc = -ENOSYS; | |
6ab409b5 | 2570 | cifsFileInfo_put(open_file); |
f96637be | 2571 | cifs_dbg(FYI, "SetFSize for attrs rc = %d\n", rc); |
8efdbde6 JL |
2572 | } else |
2573 | rc = -EINVAL; | |
2574 | ||
d1433418 PS |
2575 | if (!rc) |
2576 | goto set_size_out; | |
2577 | ||
2578 | if (tcon == NULL) { | |
2579 | tlink = cifs_sb_tlink(cifs_sb); | |
2580 | if (IS_ERR(tlink)) | |
2581 | return PTR_ERR(tlink); | |
2582 | tcon = tlink_tcon(tlink); | |
2583 | server = tcon->ses->server; | |
2584 | } | |
ba00ba64 | 2585 | |
d1433418 PS |
2586 | /* |
2587 | * Set file size by pathname rather than by handle either because no | |
2588 | * valid, writeable file handle for it was found or because there was | |
2589 | * an error setting it by handle. | |
2590 | */ | |
2591 | if (server->ops->set_path_size) | |
2592 | rc = server->ops->set_path_size(xid, tcon, full_path, | |
2593 | attrs->ia_size, cifs_sb, false); | |
2594 | else | |
2595 | rc = -ENOSYS; | |
f96637be | 2596 | cifs_dbg(FYI, "SetEOF by path (setattrs) rc = %d\n", rc); |
d1433418 | 2597 | |
d1433418 PS |
2598 | if (tlink) |
2599 | cifs_put_tlink(tlink); | |
8efdbde6 | 2600 | |
d1433418 | 2601 | set_size_out: |
8efdbde6 | 2602 | if (rc == 0) { |
fbec9ab9 | 2603 | cifsInode->server_eof = attrs->ia_size; |
1b947463 | 2604 | cifs_setsize(inode, attrs->ia_size); |
65af8f01 SF |
2605 | /* |
2606 | * i_blocks is not related to (i_size / i_blksize), but instead | |
2607 | * 512 byte (2**9) size is required for calculating num blocks. | |
2608 | * Until we can query the server for actual allocation size, | |
2609 | * this is best estimate we have for blocks allocated for a file | |
2610 | * Number of blocks must be rounded up so size 1 is not 0 blocks | |
2611 | */ | |
2612 | inode->i_blocks = (512 - 1 + attrs->ia_size) >> 9; | |
5618303d ZX |
2613 | |
2614 | /* | |
2615 | * The man page of truncate says if the size changed, | |
2616 | * then the st_ctime and st_mtime fields for the file | |
2617 | * are updated. | |
2618 | */ | |
2619 | attrs->ia_ctime = attrs->ia_mtime = current_time(inode); | |
2620 | attrs->ia_valid |= ATTR_CTIME | ATTR_MTIME; | |
2621 | ||
8efdbde6 JL |
2622 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
2623 | } | |
2624 | ||
2625 | return rc; | |
2626 | } | |
2627 | ||
3fe5c1dd JL |
2628 | static int |
2629 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) | |
2630 | { | |
2631 | int rc; | |
6d5786a3 | 2632 | unsigned int xid; |
f6a9bc33 AV |
2633 | const char *full_path; |
2634 | void *page = alloc_dentry_path(); | |
2b0143b5 | 2635 | struct inode *inode = d_inode(direntry); |
3fe5c1dd JL |
2636 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
2637 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
7ffec372 | 2638 | struct tcon_link *tlink; |
96daf2b0 | 2639 | struct cifs_tcon *pTcon; |
3fe5c1dd | 2640 | struct cifs_unix_set_info_args *args = NULL; |
3bbeeb3c | 2641 | struct cifsFileInfo *open_file; |
3fe5c1dd | 2642 | |
35c265e0 AV |
2643 | cifs_dbg(FYI, "setattr_unix on file %pd attrs->ia_valid=0x%x\n", |
2644 | direntry, attrs->ia_valid); | |
3fe5c1dd | 2645 | |
6d5786a3 | 2646 | xid = get_xid(); |
3fe5c1dd | 2647 | |
db78b877 CH |
2648 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2649 | attrs->ia_valid |= ATTR_FORCE; | |
2650 | ||
2f221d6f | 2651 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
db78b877 CH |
2652 | if (rc < 0) |
2653 | goto out; | |
3fe5c1dd | 2654 | |
f6a9bc33 AV |
2655 | full_path = build_path_from_dentry(direntry, page); |
2656 | if (IS_ERR(full_path)) { | |
2657 | rc = PTR_ERR(full_path); | |
3fe5c1dd JL |
2658 | goto out; |
2659 | } | |
2660 | ||
0f4d634c JL |
2661 | /* |
2662 | * Attempt to flush data before changing attributes. We need to do | |
2663 | * this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the | |
2664 | * ownership or mode then we may also need to do this. Here, we take | |
2665 | * the safe way out and just do the flush on all setattr requests. If | |
2666 | * the flush returns error, store it to report later and continue. | |
2667 | * | |
2668 | * BB: This should be smarter. Why bother flushing pages that | |
2669 | * will be truncated anyway? Also, should we error out here if | |
2670 | * the flush returns error? | |
2671 | */ | |
2672 | rc = filemap_write_and_wait(inode->i_mapping); | |
9a66396f PS |
2673 | if (is_interrupt_error(rc)) { |
2674 | rc = -ERESTARTSYS; | |
2675 | goto out; | |
2676 | } | |
2677 | ||
eb4b756b JL |
2678 | mapping_set_error(inode->i_mapping, rc); |
2679 | rc = 0; | |
3fe5c1dd JL |
2680 | |
2681 | if (attrs->ia_valid & ATTR_SIZE) { | |
2682 | rc = cifs_set_file_size(inode, attrs, xid, full_path); | |
2683 | if (rc != 0) | |
2684 | goto out; | |
2685 | } | |
2686 | ||
2687 | /* skip mode change if it's just for clearing setuid/setgid */ | |
2688 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2689 | attrs->ia_valid &= ~ATTR_MODE; | |
2690 | ||
2691 | args = kmalloc(sizeof(*args), GFP_KERNEL); | |
2692 | if (args == NULL) { | |
2693 | rc = -ENOMEM; | |
2694 | goto out; | |
2695 | } | |
2696 | ||
2697 | /* set up the struct */ | |
2698 | if (attrs->ia_valid & ATTR_MODE) | |
2699 | args->mode = attrs->ia_mode; | |
2700 | else | |
2701 | args->mode = NO_CHANGE_64; | |
2702 | ||
2703 | if (attrs->ia_valid & ATTR_UID) | |
2704 | args->uid = attrs->ia_uid; | |
2705 | else | |
49418b2c | 2706 | args->uid = INVALID_UID; /* no change */ |
3fe5c1dd JL |
2707 | |
2708 | if (attrs->ia_valid & ATTR_GID) | |
2709 | args->gid = attrs->ia_gid; | |
2710 | else | |
49418b2c | 2711 | args->gid = INVALID_GID; /* no change */ |
3fe5c1dd JL |
2712 | |
2713 | if (attrs->ia_valid & ATTR_ATIME) | |
95390201 | 2714 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
3fe5c1dd JL |
2715 | else |
2716 | args->atime = NO_CHANGE_64; | |
2717 | ||
2718 | if (attrs->ia_valid & ATTR_MTIME) | |
95390201 | 2719 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
3fe5c1dd JL |
2720 | else |
2721 | args->mtime = NO_CHANGE_64; | |
2722 | ||
2723 | if (attrs->ia_valid & ATTR_CTIME) | |
95390201 | 2724 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
3fe5c1dd JL |
2725 | else |
2726 | args->ctime = NO_CHANGE_64; | |
2727 | ||
2728 | args->device = 0; | |
86f740f2 | 2729 | open_file = find_writable_file(cifsInode, FIND_WR_FSUID_ONLY); |
3bbeeb3c | 2730 | if (open_file) { |
4b4de76e | 2731 | u16 nfid = open_file->fid.netfid; |
3bbeeb3c | 2732 | u32 npid = open_file->pid; |
13cfb733 | 2733 | pTcon = tlink_tcon(open_file->tlink); |
3bbeeb3c | 2734 | rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); |
6ab409b5 | 2735 | cifsFileInfo_put(open_file); |
3bbeeb3c | 2736 | } else { |
7ffec372 JL |
2737 | tlink = cifs_sb_tlink(cifs_sb); |
2738 | if (IS_ERR(tlink)) { | |
2739 | rc = PTR_ERR(tlink); | |
2740 | goto out; | |
2741 | } | |
2742 | pTcon = tlink_tcon(tlink); | |
3bbeeb3c | 2743 | rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, |
01ea95e3 | 2744 | cifs_sb->local_nls, |
bc8ebdc4 | 2745 | cifs_remap(cifs_sb)); |
7ffec372 | 2746 | cifs_put_tlink(tlink); |
3bbeeb3c | 2747 | } |
3fe5c1dd | 2748 | |
1025774c CH |
2749 | if (rc) |
2750 | goto out; | |
ccd4bb1b | 2751 | |
1025774c | 2752 | if ((attrs->ia_valid & ATTR_SIZE) && |
1b947463 CH |
2753 | attrs->ia_size != i_size_read(inode)) |
2754 | truncate_setsize(inode, attrs->ia_size); | |
1025774c | 2755 | |
2f221d6f | 2756 | setattr_copy(&init_user_ns, inode, attrs); |
1025774c CH |
2757 | mark_inode_dirty(inode); |
2758 | ||
2759 | /* force revalidate when any of these times are set since some | |
2760 | of the fs types (eg ext3, fat) do not have fine enough | |
2761 | time granularity to match protocol, and we do not have a | |
2762 | a way (yet) to query the server fs's time granularity (and | |
2763 | whether it rounds times down). | |
2764 | */ | |
2765 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_CTIME)) | |
2766 | cifsInode->time = 0; | |
3fe5c1dd JL |
2767 | out: |
2768 | kfree(args); | |
f6a9bc33 | 2769 | free_dentry_path(page); |
6d5786a3 | 2770 | free_xid(xid); |
3fe5c1dd JL |
2771 | return rc; |
2772 | } | |
2773 | ||
0510eeb7 JL |
2774 | static int |
2775 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) | |
1da177e4 | 2776 | { |
6d5786a3 | 2777 | unsigned int xid; |
8abf2775 EB |
2778 | kuid_t uid = INVALID_UID; |
2779 | kgid_t gid = INVALID_GID; | |
2b0143b5 | 2780 | struct inode *inode = d_inode(direntry); |
3fe5c1dd | 2781 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
3fe5c1dd | 2782 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
aa081859 RS |
2783 | struct cifsFileInfo *wfile; |
2784 | struct cifs_tcon *tcon; | |
f6a9bc33 AV |
2785 | const char *full_path; |
2786 | void *page = alloc_dentry_path(); | |
1da177e4 | 2787 | int rc = -EACCES; |
feb3e20c | 2788 | __u32 dosattr = 0; |
4e1e7fb9 | 2789 | __u64 mode = NO_CHANGE_64; |
3fe5c1dd | 2790 | |
6d5786a3 | 2791 | xid = get_xid(); |
1da177e4 | 2792 | |
63d614a6 | 2793 | cifs_dbg(FYI, "setattr on file %pd attrs->ia_valid 0x%x\n", |
35c265e0 | 2794 | direntry, attrs->ia_valid); |
6473a559 | 2795 | |
db78b877 CH |
2796 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
2797 | attrs->ia_valid |= ATTR_FORCE; | |
2798 | ||
2f221d6f | 2799 | rc = setattr_prepare(&init_user_ns, direntry, attrs); |
f6a9bc33 AV |
2800 | if (rc < 0) |
2801 | goto cifs_setattr_exit; | |
50c2f753 | 2802 | |
f6a9bc33 AV |
2803 | full_path = build_path_from_dentry(direntry, page); |
2804 | if (IS_ERR(full_path)) { | |
2805 | rc = PTR_ERR(full_path); | |
2806 | goto cifs_setattr_exit; | |
1da177e4 | 2807 | } |
1da177e4 | 2808 | |
0f4d634c JL |
2809 | /* |
2810 | * Attempt to flush data before changing attributes. We need to do | |
cf5371ae SF |
2811 | * this for ATTR_SIZE and ATTR_MTIME. If the flush of the data |
2812 | * returns error, store it to report later and continue. | |
0f4d634c JL |
2813 | * |
2814 | * BB: This should be smarter. Why bother flushing pages that | |
2815 | * will be truncated anyway? Also, should we error out here if | |
cf5371ae | 2816 | * the flush returns error? Do we need to check for ATTR_MTIME_SET flag? |
0f4d634c | 2817 | */ |
cf5371ae SF |
2818 | if (attrs->ia_valid & (ATTR_MTIME | ATTR_SIZE | ATTR_CTIME)) { |
2819 | rc = filemap_write_and_wait(inode->i_mapping); | |
2820 | if (is_interrupt_error(rc)) { | |
2821 | rc = -ERESTARTSYS; | |
2822 | goto cifs_setattr_exit; | |
2823 | } | |
2824 | mapping_set_error(inode->i_mapping, rc); | |
9a66396f PS |
2825 | } |
2826 | ||
eb4b756b | 2827 | rc = 0; |
cea21805 | 2828 | |
cf5371ae SF |
2829 | if ((attrs->ia_valid & ATTR_MTIME) && |
2830 | !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { | |
86f740f2 | 2831 | rc = cifs_get_writable_file(cifsInode, FIND_WR_ANY, &wfile); |
aa081859 RS |
2832 | if (!rc) { |
2833 | tcon = tlink_tcon(wfile->tlink); | |
2834 | rc = tcon->ses->server->ops->flush(xid, tcon, &wfile->fid); | |
2835 | cifsFileInfo_put(wfile); | |
2836 | if (rc) | |
783bf7b8 | 2837 | goto cifs_setattr_exit; |
aa081859 | 2838 | } else if (rc != -EBADF) |
783bf7b8 | 2839 | goto cifs_setattr_exit; |
aa081859 RS |
2840 | else |
2841 | rc = 0; | |
2842 | } | |
2843 | ||
50531444 | 2844 | if (attrs->ia_valid & ATTR_SIZE) { |
8efdbde6 JL |
2845 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
2846 | if (rc != 0) | |
e30dcf3a | 2847 | goto cifs_setattr_exit; |
1da177e4 | 2848 | } |
4ca691a8 | 2849 | |
a5ff3769 SP |
2850 | if (attrs->ia_valid & ATTR_UID) |
2851 | uid = attrs->ia_uid; | |
2852 | ||
2853 | if (attrs->ia_valid & ATTR_GID) | |
2854 | gid = attrs->ia_gid; | |
2855 | ||
22442179 SF |
2856 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2857 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
8abf2775 | 2858 | if (uid_valid(uid) || gid_valid(gid)) { |
0f22053e SP |
2859 | mode = NO_CHANGE_64; |
2860 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, | |
a5ff3769 SP |
2861 | uid, gid); |
2862 | if (rc) { | |
f96637be JP |
2863 | cifs_dbg(FYI, "%s: Setting id failed with error: %d\n", |
2864 | __func__, rc); | |
a5ff3769 SP |
2865 | goto cifs_setattr_exit; |
2866 | } | |
2867 | } | |
2868 | } else | |
3fe5c1dd | 2869 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
4ca691a8 | 2870 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
1da177e4 | 2871 | |
d32c4f26 JL |
2872 | /* skip mode change if it's just for clearing setuid/setgid */ |
2873 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) | |
2874 | attrs->ia_valid &= ~ATTR_MODE; | |
2875 | ||
1da177e4 | 2876 | if (attrs->ia_valid & ATTR_MODE) { |
1da177e4 | 2877 | mode = attrs->ia_mode; |
cdbce9c8 | 2878 | rc = 0; |
22442179 SF |
2879 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) || |
2880 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID)) { | |
0f22053e | 2881 | rc = id_mode_to_cifs_acl(inode, full_path, &mode, |
8abf2775 | 2882 | INVALID_UID, INVALID_GID); |
78415d2d | 2883 | if (rc) { |
f96637be JP |
2884 | cifs_dbg(FYI, "%s: Setting ACL failed with error: %d\n", |
2885 | __func__, rc); | |
78415d2d SP |
2886 | goto cifs_setattr_exit; |
2887 | } | |
0f22053e SP |
2888 | |
2889 | /* | |
2890 | * In case of CIFS_MOUNT_CIFS_ACL, we cannot support all modes. | |
2891 | * Pick up the actual mode bits that were set. | |
2892 | */ | |
2893 | if (mode != attrs->ia_mode) | |
2894 | attrs->ia_mode = mode; | |
78415d2d | 2895 | } else |
5132861a JL |
2896 | if (((mode & S_IWUGO) == 0) && |
2897 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { | |
feb3e20c JL |
2898 | |
2899 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; | |
2900 | ||
5132861a JL |
2901 | /* fix up mode if we're not using dynperm */ |
2902 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) | |
2903 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; | |
2904 | } else if ((mode & S_IWUGO) && | |
2905 | (cifsInode->cifsAttrs & ATTR_READONLY)) { | |
feb3e20c JL |
2906 | |
2907 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; | |
2908 | /* Attributes of 0 are ignored */ | |
2909 | if (dosattr == 0) | |
2910 | dosattr |= ATTR_NORMAL; | |
5132861a JL |
2911 | |
2912 | /* reset local inode permissions to normal */ | |
2913 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2914 | attrs->ia_mode &= ~(S_IALLUGO); | |
2915 | if (S_ISDIR(inode->i_mode)) | |
2916 | attrs->ia_mode |= | |
8401e936 | 2917 | cifs_sb->ctx->dir_mode; |
5132861a JL |
2918 | else |
2919 | attrs->ia_mode |= | |
8401e936 | 2920 | cifs_sb->ctx->file_mode; |
5132861a JL |
2921 | } |
2922 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { | |
2923 | /* ignore mode change - ATTR_READONLY hasn't changed */ | |
2924 | attrs->ia_valid &= ~ATTR_MODE; | |
1da177e4 | 2925 | } |
1da177e4 LT |
2926 | } |
2927 | ||
feb3e20c JL |
2928 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
2929 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { | |
2930 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); | |
2931 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ | |
1da177e4 | 2932 | |
e30dcf3a SF |
2933 | /* Even if error on time set, no sense failing the call if |
2934 | the server would set the time to a reasonable value anyway, | |
2935 | and this check ensures that we are not being called from | |
2936 | sys_utimes in which case we ought to fail the call back to | |
2937 | the user when the server rejects the call */ | |
fb8c4b14 | 2938 | if ((rc) && (attrs->ia_valid & |
feb3e20c | 2939 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
e30dcf3a | 2940 | rc = 0; |
1da177e4 LT |
2941 | } |
2942 | ||
2943 | /* do not need local check to inode_check_ok since the server does | |
2944 | that */ | |
1025774c CH |
2945 | if (rc) |
2946 | goto cifs_setattr_exit; | |
2947 | ||
2948 | if ((attrs->ia_valid & ATTR_SIZE) && | |
1b947463 CH |
2949 | attrs->ia_size != i_size_read(inode)) |
2950 | truncate_setsize(inode, attrs->ia_size); | |
1025774c | 2951 | |
2f221d6f | 2952 | setattr_copy(&init_user_ns, inode, attrs); |
1025774c | 2953 | mark_inode_dirty(inode); |
1025774c | 2954 | |
e30dcf3a | 2955 | cifs_setattr_exit: |
6d5786a3 | 2956 | free_xid(xid); |
f6a9bc33 | 2957 | free_dentry_path(page); |
1da177e4 LT |
2958 | return rc; |
2959 | } | |
2960 | ||
0510eeb7 | 2961 | int |
549c7297 CB |
2962 | cifs_setattr(struct user_namespace *mnt_userns, struct dentry *direntry, |
2963 | struct iattr *attrs) | |
0510eeb7 | 2964 | { |
fc64005c | 2965 | struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb); |
96daf2b0 | 2966 | struct cifs_tcon *pTcon = cifs_sb_master_tcon(cifs_sb); |
c6cc4c5a | 2967 | int rc, retries = 0; |
0510eeb7 | 2968 | |
c6cc4c5a RS |
2969 | do { |
2970 | if (pTcon->unix_ext) | |
2971 | rc = cifs_setattr_unix(direntry, attrs); | |
2972 | else | |
2973 | rc = cifs_setattr_nounix(direntry, attrs); | |
2974 | retries++; | |
2975 | } while (is_retryable_error(rc) && retries < 2); | |
0510eeb7 JL |
2976 | |
2977 | /* BB: add cifs_setattr_legacy for really old servers */ | |
c6cc4c5a | 2978 | return rc; |
0510eeb7 | 2979 | } |