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> |
f995e740 | 25 | #include <linux/xattr.h> |
1da177e4 LT |
26 | #include "cifsfs.h" |
27 | #include "cifspdu.h" | |
28 | #include "cifsglob.h" | |
29 | #include "cifsproto.h" | |
30 | #include "cifs_debug.h" | |
31 | ||
32 | #define MAX_EA_VALUE_SIZE 65535 | |
33 | #define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib" | |
fbeba8bb | 34 | #define CIFS_XATTR_CIFS_ACL "system.cifs_acl" |
1da177e4 | 35 | |
f995e740 | 36 | /* BB need to add server (Samba e.g) support for security and trusted prefix */ |
1da177e4 | 37 | |
79a58d1f | 38 | int cifs_removexattr(struct dentry *direntry, const char *ea_name) |
1da177e4 LT |
39 | { |
40 | int rc = -EOPNOTSUPP; | |
41 | #ifdef CONFIG_CIFS_XATTR | |
6d5786a3 | 42 | unsigned int xid; |
1da177e4 | 43 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 44 | struct tcon_link *tlink; |
96daf2b0 | 45 | struct cifs_tcon *pTcon; |
79a58d1f | 46 | struct super_block *sb; |
7ffec372 | 47 | char *full_path = NULL; |
79a58d1f SF |
48 | |
49 | if (direntry == NULL) | |
1da177e4 | 50 | return -EIO; |
79a58d1f | 51 | if (direntry->d_inode == NULL) |
1da177e4 LT |
52 | return -EIO; |
53 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 54 | if (sb == NULL) |
1da177e4 | 55 | return -EIO; |
79a58d1f | 56 | |
1da177e4 | 57 | cifs_sb = CIFS_SB(sb); |
7ffec372 JL |
58 | tlink = cifs_sb_tlink(cifs_sb); |
59 | if (IS_ERR(tlink)) | |
60 | return PTR_ERR(tlink); | |
61 | pTcon = tlink_tcon(tlink); | |
62 | ||
6d5786a3 | 63 | xid = get_xid(); |
79a58d1f | 64 | |
1da177e4 | 65 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 66 | if (full_path == NULL) { |
0f3bc09e | 67 | rc = -ENOMEM; |
7ffec372 | 68 | goto remove_ea_exit; |
1da177e4 | 69 | } |
79a58d1f | 70 | if (ea_name == NULL) { |
f96637be | 71 | cifs_dbg(FYI, "Null xattr names not supported\n"); |
f995e740 MZ |
72 | } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) |
73 | && (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) { | |
f96637be JP |
74 | cifs_dbg(FYI, |
75 | "illegal xattr request %s (only user namespace supported)\n", | |
76 | ea_name); | |
1da177e4 LT |
77 | /* BB what if no namespace prefix? */ |
78 | /* Should we just pass them to server, except for | |
79 | system and perhaps security prefixes? */ | |
80 | } else { | |
79a58d1f | 81 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 LT |
82 | goto remove_ea_exit; |
83 | ||
f995e740 | 84 | ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ |
666753c3 SF |
85 | if (pTcon->ses->server->ops->set_EA) |
86 | rc = pTcon->ses->server->ops->set_EA(xid, pTcon, | |
87 | full_path, ea_name, NULL, (__u16)0, | |
88 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
89 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
1da177e4 LT |
90 | } |
91 | remove_ea_exit: | |
f99d49ad | 92 | kfree(full_path); |
6d5786a3 | 93 | free_xid(xid); |
7ffec372 | 94 | cifs_put_tlink(tlink); |
1da177e4 LT |
95 | #endif |
96 | return rc; | |
97 | } | |
98 | ||
79a58d1f SF |
99 | int cifs_setxattr(struct dentry *direntry, const char *ea_name, |
100 | const void *ea_value, size_t value_size, int flags) | |
1da177e4 LT |
101 | { |
102 | int rc = -EOPNOTSUPP; | |
103 | #ifdef CONFIG_CIFS_XATTR | |
6d5786a3 | 104 | unsigned int xid; |
1da177e4 | 105 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 106 | struct tcon_link *tlink; |
96daf2b0 | 107 | struct cifs_tcon *pTcon; |
79a58d1f SF |
108 | struct super_block *sb; |
109 | char *full_path; | |
1da177e4 | 110 | |
79a58d1f | 111 | if (direntry == NULL) |
1da177e4 | 112 | return -EIO; |
79a58d1f | 113 | if (direntry->d_inode == NULL) |
1da177e4 LT |
114 | return -EIO; |
115 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 116 | if (sb == NULL) |
1da177e4 | 117 | return -EIO; |
1da177e4 LT |
118 | |
119 | cifs_sb = CIFS_SB(sb); | |
7ffec372 JL |
120 | tlink = cifs_sb_tlink(cifs_sb); |
121 | if (IS_ERR(tlink)) | |
122 | return PTR_ERR(tlink); | |
123 | pTcon = tlink_tcon(tlink); | |
124 | ||
6d5786a3 | 125 | xid = get_xid(); |
1da177e4 | 126 | |
1da177e4 | 127 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 128 | if (full_path == NULL) { |
0f3bc09e | 129 | rc = -ENOMEM; |
7ffec372 | 130 | goto set_ea_exit; |
1da177e4 LT |
131 | } |
132 | /* return dos attributes as pseudo xattr */ | |
133 | /* return alt name if available as pseudo attr */ | |
134 | ||
135 | /* if proc/fs/cifs/streamstoxattr is set then | |
79a58d1f | 136 | search server for EAs or streams to |
1da177e4 | 137 | returns as xattrs */ |
79a58d1f | 138 | if (value_size > MAX_EA_VALUE_SIZE) { |
f96637be | 139 | cifs_dbg(FYI, "size of EA value too large\n"); |
7ffec372 JL |
140 | rc = -EOPNOTSUPP; |
141 | goto set_ea_exit; | |
1da177e4 LT |
142 | } |
143 | ||
79a58d1f | 144 | if (ea_name == NULL) { |
f96637be | 145 | cifs_dbg(FYI, "Null xattr names not supported\n"); |
f995e740 MZ |
146 | } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) |
147 | == 0) { | |
79a58d1f | 148 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 | 149 | goto set_ea_exit; |
ad7a2926 | 150 | if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) |
f96637be | 151 | cifs_dbg(FYI, "attempt to set cifs inode metadata\n"); |
ad7a2926 | 152 | |
f995e740 | 153 | ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ |
666753c3 SF |
154 | if (pTcon->ses->server->ops->set_EA) |
155 | rc = pTcon->ses->server->ops->set_EA(xid, pTcon, | |
156 | full_path, ea_name, ea_value, (__u16)value_size, | |
157 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
158 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
f995e740 MZ |
159 | } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) |
160 | == 0) { | |
79a58d1f | 161 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 LT |
162 | goto set_ea_exit; |
163 | ||
f995e740 | 164 | ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */ |
666753c3 SF |
165 | if (pTcon->ses->server->ops->set_EA) |
166 | rc = pTcon->ses->server->ops->set_EA(xid, pTcon, | |
167 | full_path, ea_name, ea_value, (__u16)value_size, | |
168 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
169 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
b73b9a4b SF |
170 | } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL, |
171 | strlen(CIFS_XATTR_CIFS_ACL)) == 0) { | |
b0f8ef20 SN |
172 | #ifdef CONFIG_CIFS_ACL |
173 | struct cifs_ntsd *pacl; | |
b73b9a4b SF |
174 | pacl = kmalloc(value_size, GFP_KERNEL); |
175 | if (!pacl) { | |
b73b9a4b SF |
176 | rc = -ENOMEM; |
177 | } else { | |
b73b9a4b | 178 | memcpy(pacl, ea_value, value_size); |
83e3bc23 SF |
179 | if (pTcon->ses->server->ops->set_acl) |
180 | rc = pTcon->ses->server->ops->set_acl(pacl, | |
181 | value_size, direntry->d_inode, | |
182 | full_path, CIFS_ACL_DACL); | |
183 | else | |
184 | rc = -EOPNOTSUPP; | |
b73b9a4b SF |
185 | if (rc == 0) /* force revalidate of the inode */ |
186 | CIFS_I(direntry->d_inode)->time = 0; | |
187 | kfree(pacl); | |
b0f8ef20 | 188 | } |
b73b9a4b | 189 | #else |
f96637be | 190 | cifs_dbg(FYI, "Set CIFS ACL not supported yet\n"); |
b73b9a4b | 191 | #endif /* CONFIG_CIFS_ACL */ |
1da177e4 | 192 | } else { |
79a58d1f SF |
193 | int temp; |
194 | temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, | |
1da177e4 LT |
195 | strlen(POSIX_ACL_XATTR_ACCESS)); |
196 | if (temp == 0) { | |
197 | #ifdef CONFIG_CIFS_POSIX | |
79a58d1f SF |
198 | if (sb->s_flags & MS_POSIXACL) |
199 | rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, | |
200 | ea_value, (const int)value_size, | |
201 | ACL_TYPE_ACCESS, cifs_sb->local_nls, | |
202 | cifs_sb->mnt_cifs_flags & | |
737b758c | 203 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
f96637be | 204 | cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc); |
1da177e4 | 205 | #else |
f96637be | 206 | cifs_dbg(FYI, "set POSIX ACL not supported\n"); |
1da177e4 | 207 | #endif |
79a58d1f SF |
208 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, |
209 | strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { | |
1da177e4 | 210 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f SF |
211 | if (sb->s_flags & MS_POSIXACL) |
212 | rc = CIFSSMBSetPosixACL(xid, pTcon, full_path, | |
213 | ea_value, (const int)value_size, | |
737b758c | 214 | ACL_TYPE_DEFAULT, cifs_sb->local_nls, |
79a58d1f | 215 | cifs_sb->mnt_cifs_flags & |
737b758c | 216 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
f96637be | 217 | cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc); |
1da177e4 | 218 | #else |
f96637be | 219 | cifs_dbg(FYI, "set default POSIX ACL not supported\n"); |
1da177e4 LT |
220 | #endif |
221 | } else { | |
f96637be JP |
222 | cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n", |
223 | ea_name); | |
1da177e4 | 224 | /* BB what if no namespace prefix? */ |
79a58d1f | 225 | /* Should we just pass them to server, except for |
1da177e4 LT |
226 | system and perhaps security prefixes? */ |
227 | } | |
228 | } | |
229 | ||
230 | set_ea_exit: | |
f99d49ad | 231 | kfree(full_path); |
6d5786a3 | 232 | free_xid(xid); |
7ffec372 | 233 | cifs_put_tlink(tlink); |
1da177e4 LT |
234 | #endif |
235 | return rc; | |
236 | } | |
237 | ||
79a58d1f SF |
238 | ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, |
239 | void *ea_value, size_t buf_size) | |
1da177e4 LT |
240 | { |
241 | ssize_t rc = -EOPNOTSUPP; | |
242 | #ifdef CONFIG_CIFS_XATTR | |
6d5786a3 | 243 | unsigned int xid; |
1da177e4 | 244 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 245 | struct tcon_link *tlink; |
96daf2b0 | 246 | struct cifs_tcon *pTcon; |
79a58d1f SF |
247 | struct super_block *sb; |
248 | char *full_path; | |
1da177e4 | 249 | |
79a58d1f | 250 | if (direntry == NULL) |
1da177e4 | 251 | return -EIO; |
79a58d1f | 252 | if (direntry->d_inode == NULL) |
1da177e4 LT |
253 | return -EIO; |
254 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 255 | if (sb == NULL) |
1da177e4 LT |
256 | return -EIO; |
257 | ||
1da177e4 | 258 | cifs_sb = CIFS_SB(sb); |
7ffec372 JL |
259 | tlink = cifs_sb_tlink(cifs_sb); |
260 | if (IS_ERR(tlink)) | |
261 | return PTR_ERR(tlink); | |
262 | pTcon = tlink_tcon(tlink); | |
263 | ||
6d5786a3 | 264 | xid = get_xid(); |
1da177e4 | 265 | |
1da177e4 | 266 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 267 | if (full_path == NULL) { |
0f3bc09e | 268 | rc = -ENOMEM; |
7ffec372 | 269 | goto get_ea_exit; |
1da177e4 LT |
270 | } |
271 | /* return dos attributes as pseudo xattr */ | |
272 | /* return alt name if available as pseudo attr */ | |
79a58d1f | 273 | if (ea_name == NULL) { |
f96637be | 274 | cifs_dbg(FYI, "Null xattr names not supported\n"); |
f995e740 MZ |
275 | } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) |
276 | == 0) { | |
79a58d1f | 277 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 LT |
278 | goto get_ea_exit; |
279 | ||
79a58d1f | 280 | if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) { |
f96637be | 281 | cifs_dbg(FYI, "attempt to query cifs inode metadata\n"); |
1da177e4 LT |
282 | /* revalidate/getattr then populate from inode */ |
283 | } /* BB add else when above is implemented */ | |
f995e740 | 284 | ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */ |
666753c3 SF |
285 | if (pTcon->ses->server->ops->query_all_EAs) |
286 | rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon, | |
287 | full_path, ea_name, ea_value, buf_size, | |
288 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
289 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
f995e740 | 290 | } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { |
79a58d1f | 291 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
1da177e4 LT |
292 | goto get_ea_exit; |
293 | ||
f995e740 | 294 | ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */ |
666753c3 SF |
295 | if (pTcon->ses->server->ops->query_all_EAs) |
296 | rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon, | |
297 | full_path, ea_name, ea_value, buf_size, | |
298 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
299 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
79a58d1f | 300 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS, |
0a4b92c0 | 301 | strlen(POSIX_ACL_XATTR_ACCESS)) == 0) { |
1da177e4 | 302 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f | 303 | if (sb->s_flags & MS_POSIXACL) |
1da0c78b | 304 | rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, |
79a58d1f | 305 | ea_value, buf_size, ACL_TYPE_ACCESS, |
737b758c | 306 | cifs_sb->local_nls, |
79a58d1f | 307 | cifs_sb->mnt_cifs_flags & |
737b758c | 308 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
79a58d1f | 309 | #else |
f96637be | 310 | cifs_dbg(FYI, "Query POSIX ACL not supported yet\n"); |
1da177e4 | 311 | #endif /* CONFIG_CIFS_POSIX */ |
79a58d1f | 312 | } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT, |
0a4b92c0 | 313 | strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) { |
1da177e4 | 314 | #ifdef CONFIG_CIFS_POSIX |
79a58d1f | 315 | if (sb->s_flags & MS_POSIXACL) |
1da0c78b | 316 | rc = CIFSSMBGetPosixACL(xid, pTcon, full_path, |
79a58d1f | 317 | ea_value, buf_size, ACL_TYPE_DEFAULT, |
737b758c | 318 | cifs_sb->local_nls, |
79a58d1f | 319 | cifs_sb->mnt_cifs_flags & |
737b758c | 320 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
79a58d1f | 321 | #else |
f96637be | 322 | cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n"); |
fbeba8bb SP |
323 | #endif /* CONFIG_CIFS_POSIX */ |
324 | } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL, | |
325 | strlen(CIFS_XATTR_CIFS_ACL)) == 0) { | |
326 | #ifdef CONFIG_CIFS_ACL | |
327 | u32 acllen; | |
328 | struct cifs_ntsd *pacl; | |
329 | ||
83e3bc23 SF |
330 | if (pTcon->ses->server->ops->get_acl == NULL) |
331 | goto get_ea_exit; /* rc already EOPNOTSUPP */ | |
332 | ||
333 | pacl = pTcon->ses->server->ops->get_acl(cifs_sb, | |
334 | direntry->d_inode, full_path, &acllen); | |
fbeba8bb SP |
335 | if (IS_ERR(pacl)) { |
336 | rc = PTR_ERR(pacl); | |
f96637be JP |
337 | cifs_dbg(VFS, "%s: error %zd getting sec desc\n", |
338 | __func__, rc); | |
fbeba8bb SP |
339 | } else { |
340 | if (ea_value) { | |
341 | if (acllen > buf_size) | |
342 | acllen = -ERANGE; | |
343 | else | |
344 | memcpy(ea_value, pacl, acllen); | |
345 | } | |
346 | rc = acllen; | |
347 | kfree(pacl); | |
348 | } | |
349 | #else | |
f96637be | 350 | cifs_dbg(FYI, "Query CIFS ACL not supported yet\n"); |
fbeba8bb | 351 | #endif /* CONFIG_CIFS_ACL */ |
79a58d1f | 352 | } else if (strncmp(ea_name, |
f995e740 | 353 | XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) { |
f96637be | 354 | cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n"); |
79a58d1f | 355 | } else if (strncmp(ea_name, |
f995e740 | 356 | XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) { |
f96637be | 357 | cifs_dbg(FYI, "Security xattr namespace not supported yet\n"); |
ad7a2926 | 358 | } else |
f96637be JP |
359 | cifs_dbg(FYI, |
360 | "illegal xattr request %s (only user namespace supported)\n", | |
361 | ea_name); | |
1da177e4 | 362 | |
79a58d1f | 363 | /* We could add an additional check for streams ie |
1da177e4 | 364 | if proc/fs/cifs/streamstoxattr is set then |
79a58d1f | 365 | search server for EAs or streams to |
1da177e4 LT |
366 | returns as xattrs */ |
367 | ||
79a58d1f SF |
368 | if (rc == -EINVAL) |
369 | rc = -EOPNOTSUPP; | |
1da177e4 LT |
370 | |
371 | get_ea_exit: | |
f99d49ad | 372 | kfree(full_path); |
6d5786a3 | 373 | free_xid(xid); |
7ffec372 | 374 | cifs_put_tlink(tlink); |
1da177e4 LT |
375 | #endif |
376 | return rc; | |
377 | } | |
378 | ||
79a58d1f | 379 | ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) |
1da177e4 LT |
380 | { |
381 | ssize_t rc = -EOPNOTSUPP; | |
382 | #ifdef CONFIG_CIFS_XATTR | |
6d5786a3 | 383 | unsigned int xid; |
1da177e4 | 384 | struct cifs_sb_info *cifs_sb; |
7ffec372 | 385 | struct tcon_link *tlink; |
96daf2b0 | 386 | struct cifs_tcon *pTcon; |
79a58d1f SF |
387 | struct super_block *sb; |
388 | char *full_path; | |
1da177e4 | 389 | |
79a58d1f | 390 | if (direntry == NULL) |
1da177e4 | 391 | return -EIO; |
79a58d1f | 392 | if (direntry->d_inode == NULL) |
1da177e4 LT |
393 | return -EIO; |
394 | sb = direntry->d_inode->i_sb; | |
79a58d1f | 395 | if (sb == NULL) |
1da177e4 | 396 | return -EIO; |
1da177e4 LT |
397 | |
398 | cifs_sb = CIFS_SB(sb); | |
79a58d1f | 399 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
ea4c07d7 SF |
400 | return -EOPNOTSUPP; |
401 | ||
7ffec372 JL |
402 | tlink = cifs_sb_tlink(cifs_sb); |
403 | if (IS_ERR(tlink)) | |
404 | return PTR_ERR(tlink); | |
405 | pTcon = tlink_tcon(tlink); | |
406 | ||
6d5786a3 | 407 | xid = get_xid(); |
ea4c07d7 | 408 | |
1da177e4 | 409 | full_path = build_path_from_dentry(direntry); |
79a58d1f | 410 | if (full_path == NULL) { |
0f3bc09e | 411 | rc = -ENOMEM; |
7ffec372 | 412 | goto list_ea_exit; |
1da177e4 LT |
413 | } |
414 | /* return dos attributes as pseudo xattr */ | |
415 | /* return alt name if available as pseudo attr */ | |
416 | ||
417 | /* if proc/fs/cifs/streamstoxattr is set then | |
79a58d1f | 418 | search server for EAs or streams to |
1da177e4 | 419 | returns as xattrs */ |
1da177e4 | 420 | |
666753c3 SF |
421 | if (pTcon->ses->server->ops->query_all_EAs) |
422 | rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon, | |
423 | full_path, NULL, data, buf_size, | |
424 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & | |
425 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
7ffec372 | 426 | list_ea_exit: |
f99d49ad | 427 | kfree(full_path); |
6d5786a3 | 428 | free_xid(xid); |
7ffec372 | 429 | cifs_put_tlink(tlink); |
1da177e4 LT |
430 | #endif |
431 | return rc; | |
432 | } |