]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/cifs/xattr.c | |
3 | * | |
79a58d1f | 4 | * Copyright (c) International Business Machines Corp., 2003, 2007 |
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 | ||
22 | #include <linux/fs.h> | |
23 | #include <linux/posix_acl_xattr.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 LT |
25 | #include "cifsfs.h" |
26 | #include "cifspdu.h" | |
27 | #include "cifsglob.h" | |
28 | #include "cifsproto.h" | |
29 | #include "cifs_debug.h" | |
30 | ||
31 | #define MAX_EA_VALUE_SIZE 65535 | |
32 | #define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib" | |
33 | #define CIFS_XATTR_USER_PREFIX "user." | |
34 | #define CIFS_XATTR_SYSTEM_PREFIX "system." | |
35 | #define CIFS_XATTR_OS2_PREFIX "os2." | |
36 | #define CIFS_XATTR_SECURITY_PREFIX ".security" | |
37 | #define CIFS_XATTR_TRUSTED_PREFIX "trusted." | |
38 | #define XATTR_TRUSTED_PREFIX_LEN 8 | |
39 | #define XATTR_SECURITY_PREFIX_LEN 9 | |
40 | /* BB need to add server (Samba e.g) support for security and trusted prefix */ | |
50c2f753 | 41 | |
1da177e4 LT |
42 | |
43 | ||
79a58d1f | 44 | int cifs_removexattr(struct dentry *direntry, const char *ea_name) |
1da177e4 LT |
45 | { |
46 | int rc = -EOPNOTSUPP; | |
47 | #ifdef CONFIG_CIFS_XATTR | |
48 | int xid; | |
49 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 50 | struct tcon_link *tlink; |
1da177e4 | 51 | struct cifsTconInfo *pTcon; |
79a58d1f | 52 | struct super_block *sb; |
7ffec372 | 53 | char *full_path = NULL; |
79a58d1f SF |
54 | |
55 | if (direntry == NULL) | |
1da177e4 | 56 | return -EIO; |
79a58d1f | 57 | if (direntry->d_inode == NULL) |
1da177e4 LT |
58 | return -EIO; |
59 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 60 | if (sb == NULL) |
1da177e4 | 61 | return -EIO; |
79a58d1f | 62 | |
1da177e4 | 63 | cifs_sb = CIFS_SB(sb); |
7ffec372 JL |
64 | tlink = cifs_sb_tlink(cifs_sb); |
65 | if (IS_ERR(tlink)) | |
66 | return PTR_ERR(tlink); | |
67 | pTcon = tlink_tcon(tlink); | |
68 | ||
69 | xid = GetXid(); | |
79a58d1f | 70 | |
1da177e4 | 71 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 72 | if (full_path == NULL) { |
0f3bc09e | 73 | rc = -ENOMEM; |
7ffec372 | 74 | goto remove_ea_exit; |
1da177e4 | 75 | } |
79a58d1f | 76 | if (ea_name == NULL) { |
b6b38f70 | 77 | cFYI(1, "Null xattr names not supported"); |
79a58d1f SF |
78 | } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) |
79 | && (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4))) { | |
80 | cFYI(1, | |
b6b38f70 JP |
81 | "illegal xattr request %s (only user namespace supported)", |
82 | ea_name); | |
1da177e4 LT |
83 | /* BB what if no namespace prefix? */ |
84 | /* Should we just pass them to server, except for | |
85 | system and perhaps security prefixes? */ | |
86 | } else { | |
79a58d1f | 87 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 LT |
88 | goto remove_ea_exit; |
89 | ||
79a58d1f SF |
90 | ea_name += 5; /* skip past user. prefix */ |
91 | rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL, | |
737b758c SF |
92 | (__u16)0, cifs_sb->local_nls, |
93 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
94 | } |
95 | remove_ea_exit: | |
f99d49ad | 96 | kfree(full_path); |
1da177e4 | 97 | FreeXid(xid); |
7ffec372 | 98 | cifs_put_tlink(tlink); |
1da177e4 LT |
99 | #endif |
100 | return rc; | |
101 | } | |
102 | ||
79a58d1f SF |
103 | int cifs_setxattr(struct dentry *direntry, const char *ea_name, |
104 | const void *ea_value, size_t value_size, int flags) | |
1da177e4 LT |
105 | { |
106 | int rc = -EOPNOTSUPP; | |
107 | #ifdef CONFIG_CIFS_XATTR | |
108 | int xid; | |
109 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 110 | struct tcon_link *tlink; |
1da177e4 | 111 | struct cifsTconInfo *pTcon; |
79a58d1f SF |
112 | struct super_block *sb; |
113 | char *full_path; | |
1da177e4 | 114 | |
79a58d1f | 115 | if (direntry == NULL) |
1da177e4 | 116 | return -EIO; |
79a58d1f | 117 | if (direntry->d_inode == NULL) |
1da177e4 LT |
118 | return -EIO; |
119 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 120 | if (sb == NULL) |
1da177e4 | 121 | return -EIO; |
1da177e4 LT |
122 | |
123 | cifs_sb = CIFS_SB(sb); | |
7ffec372 JL |
124 | tlink = cifs_sb_tlink(cifs_sb); |
125 | if (IS_ERR(tlink)) | |
126 | return PTR_ERR(tlink); | |
127 | pTcon = tlink_tcon(tlink); | |
128 | ||
129 | xid = GetXid(); | |
1da177e4 | 130 | |
1da177e4 | 131 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 132 | if (full_path == NULL) { |
0f3bc09e | 133 | rc = -ENOMEM; |
7ffec372 | 134 | goto set_ea_exit; |
1da177e4 LT |
135 | } |
136 | /* return dos attributes as pseudo xattr */ | |
137 | /* return alt name if available as pseudo attr */ | |
138 | ||
139 | /* if proc/fs/cifs/streamstoxattr is set then | |
79a58d1f | 140 | search server for EAs or streams to |
1da177e4 | 141 | returns as xattrs */ |
79a58d1f | 142 | if (value_size > MAX_EA_VALUE_SIZE) { |
b6b38f70 | 143 | cFYI(1, "size of EA value too large"); |
7ffec372 JL |
144 | rc = -EOPNOTSUPP; |
145 | goto set_ea_exit; | |
1da177e4 LT |
146 | } |
147 | ||
79a58d1f | 148 | if (ea_name == NULL) { |
b6b38f70 | 149 | cFYI(1, "Null xattr names not supported"); |
79a58d1f SF |
150 | } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) { |
151 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
1da177e4 | 152 | goto set_ea_exit; |
ad7a2926 | 153 | if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) |
b6b38f70 | 154 | cFYI(1, "attempt to set cifs inode metadata"); |
ad7a2926 | 155 | |
1da177e4 | 156 | ea_name += 5; /* skip past user. prefix */ |
79a58d1f | 157 | rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value, |
737b758c SF |
158 | (__u16)value_size, cifs_sb->local_nls, |
159 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
79a58d1f SF |
160 | } else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) { |
161 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
1da177e4 LT |
162 | goto set_ea_exit; |
163 | ||
164 | ea_name += 4; /* skip past os2. prefix */ | |
79a58d1f | 165 | rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value, |
737b758c SF |
166 | (__u16)value_size, cifs_sb->local_nls, |
167 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 | 168 | } else { |
79a58d1f SF |
169 | int temp; |
170 | temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, | |
1da177e4 LT |
171 | strlen(POSIX_ACL_XATTR_ACCESS)); |
172 | if (temp == 0) { | |
173 | #ifdef CONFIG_CIFS_POSIX | |
79a58d1f SF |
174 | if (sb->s_flags & MS_POSIXACL) |
175 | rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, | |
176 | ea_value, (const int)value_size, | |
177 | ACL_TYPE_ACCESS, cifs_sb->local_nls, | |
178 | cifs_sb->mnt_cifs_flags & | |
737b758c | 179 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
b6b38f70 | 180 | cFYI(1, "set POSIX ACL rc %d", rc); |
1da177e4 | 181 | #else |
b6b38f70 | 182 | cFYI(1, "set POSIX ACL not supported"); |
1da177e4 | 183 | #endif |
79a58d1f SF |
184 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, |
185 | strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { | |
1da177e4 | 186 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f SF |
187 | if (sb->s_flags & MS_POSIXACL) |
188 | rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, | |
189 | ea_value, (const int)value_size, | |
737b758c | 190 | ACL_TYPE_DEFAULT, cifs_sb->local_nls, |
79a58d1f | 191 | cifs_sb->mnt_cifs_flags & |
737b758c | 192 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
b6b38f70 | 193 | cFYI(1, "set POSIX default ACL rc %d", rc); |
1da177e4 | 194 | #else |
b6b38f70 | 195 | cFYI(1, "set default POSIX ACL not supported"); |
1da177e4 LT |
196 | #endif |
197 | } else { | |
b6b38f70 JP |
198 | cFYI(1, "illegal xattr request %s (only user namespace" |
199 | " supported)", ea_name); | |
1da177e4 | 200 | /* BB what if no namespace prefix? */ |
79a58d1f | 201 | /* Should we just pass them to server, except for |
1da177e4 LT |
202 | system and perhaps security prefixes? */ |
203 | } | |
204 | } | |
205 | ||
206 | set_ea_exit: | |
f99d49ad | 207 | kfree(full_path); |
1da177e4 | 208 | FreeXid(xid); |
7ffec372 | 209 | cifs_put_tlink(tlink); |
1da177e4 LT |
210 | #endif |
211 | return rc; | |
212 | } | |
213 | ||
79a58d1f SF |
214 | ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, |
215 | void *ea_value, size_t buf_size) | |
1da177e4 LT |
216 | { |
217 | ssize_t rc = -EOPNOTSUPP; | |
218 | #ifdef CONFIG_CIFS_XATTR | |
219 | int xid; | |
220 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 221 | struct tcon_link *tlink; |
1da177e4 | 222 | struct cifsTconInfo *pTcon; |
79a58d1f SF |
223 | struct super_block *sb; |
224 | char *full_path; | |
1da177e4 | 225 | |
79a58d1f | 226 | if (direntry == NULL) |
1da177e4 | 227 | return -EIO; |
79a58d1f | 228 | if (direntry->d_inode == NULL) |
1da177e4 LT |
229 | return -EIO; |
230 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 231 | if (sb == NULL) |
1da177e4 LT |
232 | return -EIO; |
233 | ||
1da177e4 | 234 | cifs_sb = CIFS_SB(sb); |
7ffec372 JL |
235 | tlink = cifs_sb_tlink(cifs_sb); |
236 | if (IS_ERR(tlink)) | |
237 | return PTR_ERR(tlink); | |
238 | pTcon = tlink_tcon(tlink); | |
239 | ||
240 | xid = GetXid(); | |
1da177e4 | 241 | |
1da177e4 | 242 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 243 | if (full_path == NULL) { |
0f3bc09e | 244 | rc = -ENOMEM; |
7ffec372 | 245 | goto get_ea_exit; |
1da177e4 LT |
246 | } |
247 | /* return dos attributes as pseudo xattr */ | |
248 | /* return alt name if available as pseudo attr */ | |
79a58d1f | 249 | if (ea_name == NULL) { |
b6b38f70 | 250 | cFYI(1, "Null xattr names not supported"); |
79a58d1f SF |
251 | } else if (strncmp(ea_name, CIFS_XATTR_USER_PREFIX, 5) == 0) { |
252 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
1da177e4 LT |
253 | goto get_ea_exit; |
254 | ||
79a58d1f | 255 | if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) { |
b6b38f70 | 256 | cFYI(1, "attempt to query cifs inode metadata"); |
1da177e4 LT |
257 | /* revalidate/getattr then populate from inode */ |
258 | } /* BB add else when above is implemented */ | |
259 | ea_name += 5; /* skip past user. prefix */ | |
31c0519f | 260 | rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value, |
737b758c SF |
261 | buf_size, cifs_sb->local_nls, |
262 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
79a58d1f SF |
263 | } else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) { |
264 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
1da177e4 LT |
265 | goto get_ea_exit; |
266 | ||
267 | ea_name += 4; /* skip past os2. prefix */ | |
31c0519f | 268 | rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value, |
737b758c SF |
269 | buf_size, cifs_sb->local_nls, |
270 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
79a58d1f | 271 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, |
0a4b92c0 | 272 | strlen(POSIX_ACL_XATTR_ACCESS)) == 0) { |
1da177e4 | 273 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f | 274 | if (sb->s_flags & MS_POSIXACL) |
1da0c78b | 275 | rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, |
79a58d1f | 276 | ea_value, buf_size, ACL_TYPE_ACCESS, |
737b758c | 277 | cifs_sb->local_nls, |
79a58d1f | 278 | cifs_sb->mnt_cifs_flags & |
737b758c | 279 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
d12fd121 | 280 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
ad7a2926 | 281 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
0a4b92c0 | 282 | __u16 fid; |
4b18f2a9 | 283 | int oplock = 0; |
630f3f0c SF |
284 | struct cifs_ntsd *pacl = NULL; |
285 | __u32 buflen = 0; | |
63d2583f | 286 | if (experimEnabled) |
d12fd121 SF |
287 | rc = CIFSSMBOpen(xid, pTcon, full_path, |
288 | FILE_OPEN, GENERIC_READ, 0, &fid, | |
289 | &oplock, NULL, cifs_sb->local_nls, | |
290 | cifs_sb->mnt_cifs_flags & | |
291 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
292 | /* else rc is EOPNOTSUPP from above */ | |
293 | ||
63d2583f | 294 | if (rc == 0) { |
630f3f0c SF |
295 | rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl, |
296 | &buflen); | |
2fe87f02 | 297 | CIFSSMBClose(xid, pTcon, fid); |
0a4b92c0 | 298 | } |
d12fd121 SF |
299 | } |
300 | #endif /* EXPERIMENTAL */ | |
79a58d1f | 301 | #else |
b6b38f70 | 302 | cFYI(1, "query POSIX ACL not supported yet"); |
1da177e4 | 303 | #endif /* CONFIG_CIFS_POSIX */ |
79a58d1f | 304 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, |
0a4b92c0 | 305 | strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { |
1da177e4 | 306 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f | 307 | if (sb->s_flags & MS_POSIXACL) |
1da0c78b | 308 | rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, |
79a58d1f | 309 | ea_value, buf_size, ACL_TYPE_DEFAULT, |
737b758c | 310 | cifs_sb->local_nls, |
79a58d1f | 311 | cifs_sb->mnt_cifs_flags & |
737b758c | 312 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
79a58d1f | 313 | #else |
b6b38f70 | 314 | cFYI(1, "query POSIX default ACL not supported yet"); |
1da177e4 | 315 | #endif |
79a58d1f SF |
316 | } else if (strncmp(ea_name, |
317 | CIFS_XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) { | |
b6b38f70 | 318 | cFYI(1, "Trusted xattr namespace not supported yet"); |
79a58d1f SF |
319 | } else if (strncmp(ea_name, |
320 | CIFS_XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) { | |
b6b38f70 | 321 | cFYI(1, "Security xattr namespace not supported yet"); |
ad7a2926 | 322 | } else |
79a58d1f | 323 | cFYI(1, |
b6b38f70 JP |
324 | "illegal xattr request %s (only user namespace supported)", |
325 | ea_name); | |
1da177e4 | 326 | |
79a58d1f | 327 | /* We could add an additional check for streams ie |
1da177e4 | 328 | if proc/fs/cifs/streamstoxattr is set then |
79a58d1f | 329 | search server for EAs or streams to |
1da177e4 LT |
330 | returns as xattrs */ |
331 | ||
79a58d1f SF |
332 | if (rc == -EINVAL) |
333 | rc = -EOPNOTSUPP; | |
1da177e4 LT |
334 | |
335 | get_ea_exit: | |
f99d49ad | 336 | kfree(full_path); |
1da177e4 | 337 | FreeXid(xid); |
7ffec372 | 338 | cifs_put_tlink(tlink); |
1da177e4 LT |
339 | #endif |
340 | return rc; | |
341 | } | |
342 | ||
79a58d1f | 343 | ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) |
1da177e4 LT |
344 | { |
345 | ssize_t rc = -EOPNOTSUPP; | |
346 | #ifdef CONFIG_CIFS_XATTR | |
347 | int xid; | |
348 | struct cifs_sb_info *cifs_sb; | |
7ffec372 | 349 | struct tcon_link *tlink; |
1da177e4 | 350 | struct cifsTconInfo *pTcon; |
79a58d1f SF |
351 | struct super_block *sb; |
352 | char *full_path; | |
1da177e4 | 353 | |
79a58d1f | 354 | if (direntry == NULL) |
1da177e4 | 355 | return -EIO; |
79a58d1f | 356 | if (direntry->d_inode == NULL) |
1da177e4 LT |
357 | return -EIO; |
358 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 359 | if (sb == NULL) |
1da177e4 | 360 | return -EIO; |
1da177e4 LT |
361 | |
362 | cifs_sb = CIFS_SB(sb); | |
79a58d1f | 363 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
ea4c07d7 SF |
364 | return -EOPNOTSUPP; |
365 | ||
7ffec372 JL |
366 | tlink = cifs_sb_tlink(cifs_sb); |
367 | if (IS_ERR(tlink)) | |
368 | return PTR_ERR(tlink); | |
369 | pTcon = tlink_tcon(tlink); | |
370 | ||
ea4c07d7 SF |
371 | xid = GetXid(); |
372 | ||
1da177e4 | 373 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 374 | if (full_path == NULL) { |
0f3bc09e | 375 | rc = -ENOMEM; |
7ffec372 | 376 | goto list_ea_exit; |
1da177e4 LT |
377 | } |
378 | /* return dos attributes as pseudo xattr */ | |
379 | /* return alt name if available as pseudo attr */ | |
380 | ||
381 | /* if proc/fs/cifs/streamstoxattr is set then | |
79a58d1f | 382 | search server for EAs or streams to |
1da177e4 | 383 | returns as xattrs */ |
31c0519f JL |
384 | rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data, |
385 | buf_size, cifs_sb->local_nls, | |
79a58d1f | 386 | cifs_sb->mnt_cifs_flags & |
737b758c | 387 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
1da177e4 | 388 | |
7ffec372 | 389 | list_ea_exit: |
f99d49ad | 390 | kfree(full_path); |
1da177e4 | 391 | FreeXid(xid); |
7ffec372 | 392 | cifs_put_tlink(tlink); |
1da177e4 LT |
393 | #endif |
394 | return rc; | |
395 | } |