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1/*
2 * fs/cifs/xattr.c
3 *
4 * Copyright (c) International Business Machines Corp., 2003, 2007
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>
24#include <linux/slab.h>
25#include <linux/xattr.h>
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"
34#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
35
36/* BB need to add server (Samba e.g) support for security and trusted prefix */
37
38int cifs_removexattr(struct dentry *direntry, const char *ea_name)
39{
40 int rc = -EOPNOTSUPP;
41#ifdef CONFIG_CIFS_XATTR
42 unsigned int xid;
43 struct cifs_sb_info *cifs_sb;
44 struct tcon_link *tlink;
45 struct cifs_tcon *pTcon;
46 struct super_block *sb;
47 char *full_path = NULL;
48
49 if (direntry == NULL)
50 return -EIO;
51 if (direntry->d_inode == NULL)
52 return -EIO;
53 sb = direntry->d_inode->i_sb;
54 if (sb == NULL)
55 return -EIO;
56
57 cifs_sb = CIFS_SB(sb);
58 tlink = cifs_sb_tlink(cifs_sb);
59 if (IS_ERR(tlink))
60 return PTR_ERR(tlink);
61 pTcon = tlink_tcon(tlink);
62
63 xid = get_xid();
64
65 full_path = build_path_from_dentry(direntry);
66 if (full_path == NULL) {
67 rc = -ENOMEM;
68 goto remove_ea_exit;
69 }
70 if (ea_name == NULL) {
71 cifs_dbg(FYI, "Null xattr names not supported\n");
72 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
73 && (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
74 cifs_dbg(FYI,
75 "illegal xattr request %s (only user namespace supported)\n",
76 ea_name);
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 {
81 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
82 goto remove_ea_exit;
83
84 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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);
90 }
91remove_ea_exit:
92 kfree(full_path);
93 free_xid(xid);
94 cifs_put_tlink(tlink);
95#endif
96 return rc;
97}
98
99int cifs_setxattr(struct dentry *direntry, const char *ea_name,
100 const void *ea_value, size_t value_size, int flags)
101{
102 int rc = -EOPNOTSUPP;
103#ifdef CONFIG_CIFS_XATTR
104 unsigned int xid;
105 struct cifs_sb_info *cifs_sb;
106 struct tcon_link *tlink;
107 struct cifs_tcon *pTcon;
108 struct super_block *sb;
109 char *full_path;
110
111 if (direntry == NULL)
112 return -EIO;
113 if (direntry->d_inode == NULL)
114 return -EIO;
115 sb = direntry->d_inode->i_sb;
116 if (sb == NULL)
117 return -EIO;
118
119 cifs_sb = CIFS_SB(sb);
120 tlink = cifs_sb_tlink(cifs_sb);
121 if (IS_ERR(tlink))
122 return PTR_ERR(tlink);
123 pTcon = tlink_tcon(tlink);
124
125 xid = get_xid();
126
127 full_path = build_path_from_dentry(direntry);
128 if (full_path == NULL) {
129 rc = -ENOMEM;
130 goto set_ea_exit;
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
136 search server for EAs or streams to
137 returns as xattrs */
138 if (value_size > MAX_EA_VALUE_SIZE) {
139 cifs_dbg(FYI, "size of EA value too large\n");
140 rc = -EOPNOTSUPP;
141 goto set_ea_exit;
142 }
143
144 if (ea_name == NULL) {
145 cifs_dbg(FYI, "Null xattr names not supported\n");
146 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
147 == 0) {
148 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
149 goto set_ea_exit;
150 if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
151 cifs_dbg(FYI, "attempt to set cifs inode metadata\n");
152
153 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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);
159 } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
160 == 0) {
161 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
162 goto set_ea_exit;
163
164 ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
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);
170 } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
171 strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
172#ifdef CONFIG_CIFS_ACL
173 struct cifs_ntsd *pacl;
174 pacl = kmalloc(value_size, GFP_KERNEL);
175 if (!pacl) {
176 rc = -ENOMEM;
177 } else {
178 memcpy(pacl, ea_value, value_size);
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;
185 if (rc == 0) /* force revalidate of the inode */
186 CIFS_I(direntry->d_inode)->time = 0;
187 kfree(pacl);
188 }
189#else
190 cifs_dbg(FYI, "Set CIFS ACL not supported yet\n");
191#endif /* CONFIG_CIFS_ACL */
192 } else {
193 int temp;
194 temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
195 strlen(POSIX_ACL_XATTR_ACCESS));
196 if (temp == 0) {
197#ifdef CONFIG_CIFS_POSIX
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 &
203 CIFS_MOUNT_MAP_SPECIAL_CHR);
204 cifs_dbg(FYI, "set POSIX ACL rc %d\n", rc);
205#else
206 cifs_dbg(FYI, "set POSIX ACL not supported\n");
207#endif
208 } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
209 strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
210#ifdef CONFIG_CIFS_POSIX
211 if (sb->s_flags & MS_POSIXACL)
212 rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
213 ea_value, (const int)value_size,
214 ACL_TYPE_DEFAULT, cifs_sb->local_nls,
215 cifs_sb->mnt_cifs_flags &
216 CIFS_MOUNT_MAP_SPECIAL_CHR);
217 cifs_dbg(FYI, "set POSIX default ACL rc %d\n", rc);
218#else
219 cifs_dbg(FYI, "set default POSIX ACL not supported\n");
220#endif
221 } else {
222 cifs_dbg(FYI, "illegal xattr request %s (only user namespace supported)\n",
223 ea_name);
224 /* BB what if no namespace prefix? */
225 /* Should we just pass them to server, except for
226 system and perhaps security prefixes? */
227 }
228 }
229
230set_ea_exit:
231 kfree(full_path);
232 free_xid(xid);
233 cifs_put_tlink(tlink);
234#endif
235 return rc;
236}
237
238ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
239 void *ea_value, size_t buf_size)
240{
241 ssize_t rc = -EOPNOTSUPP;
242#ifdef CONFIG_CIFS_XATTR
243 unsigned int xid;
244 struct cifs_sb_info *cifs_sb;
245 struct tcon_link *tlink;
246 struct cifs_tcon *pTcon;
247 struct super_block *sb;
248 char *full_path;
249
250 if (direntry == NULL)
251 return -EIO;
252 if (direntry->d_inode == NULL)
253 return -EIO;
254 sb = direntry->d_inode->i_sb;
255 if (sb == NULL)
256 return -EIO;
257
258 cifs_sb = CIFS_SB(sb);
259 tlink = cifs_sb_tlink(cifs_sb);
260 if (IS_ERR(tlink))
261 return PTR_ERR(tlink);
262 pTcon = tlink_tcon(tlink);
263
264 xid = get_xid();
265
266 full_path = build_path_from_dentry(direntry);
267 if (full_path == NULL) {
268 rc = -ENOMEM;
269 goto get_ea_exit;
270 }
271 /* return dos attributes as pseudo xattr */
272 /* return alt name if available as pseudo attr */
273 if (ea_name == NULL) {
274 cifs_dbg(FYI, "Null xattr names not supported\n");
275 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
276 == 0) {
277 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
278 goto get_ea_exit;
279
280 if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
281 cifs_dbg(FYI, "attempt to query cifs inode metadata\n");
282 /* revalidate/getattr then populate from inode */
283 } /* BB add else when above is implemented */
284 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
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);
290 } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
291 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
292 goto get_ea_exit;
293
294 ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
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);
300 } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
301 strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
302#ifdef CONFIG_CIFS_POSIX
303 if (sb->s_flags & MS_POSIXACL)
304 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
305 ea_value, buf_size, ACL_TYPE_ACCESS,
306 cifs_sb->local_nls,
307 cifs_sb->mnt_cifs_flags &
308 CIFS_MOUNT_MAP_SPECIAL_CHR);
309#else
310 cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
311#endif /* CONFIG_CIFS_POSIX */
312 } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
313 strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
314#ifdef CONFIG_CIFS_POSIX
315 if (sb->s_flags & MS_POSIXACL)
316 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
317 ea_value, buf_size, ACL_TYPE_DEFAULT,
318 cifs_sb->local_nls,
319 cifs_sb->mnt_cifs_flags &
320 CIFS_MOUNT_MAP_SPECIAL_CHR);
321#else
322 cifs_dbg(FYI, "Query POSIX default ACL not supported yet\n");
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
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);
335 if (IS_ERR(pacl)) {
336 rc = PTR_ERR(pacl);
337 cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
338 __func__, rc);
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
350 cifs_dbg(FYI, "Query CIFS ACL not supported yet\n");
351#endif /* CONFIG_CIFS_ACL */
352 } else if (strncmp(ea_name,
353 XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
354 cifs_dbg(FYI, "Trusted xattr namespace not supported yet\n");
355 } else if (strncmp(ea_name,
356 XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
357 cifs_dbg(FYI, "Security xattr namespace not supported yet\n");
358 } else
359 cifs_dbg(FYI,
360 "illegal xattr request %s (only user namespace supported)\n",
361 ea_name);
362
363 /* We could add an additional check for streams ie
364 if proc/fs/cifs/streamstoxattr is set then
365 search server for EAs or streams to
366 returns as xattrs */
367
368 if (rc == -EINVAL)
369 rc = -EOPNOTSUPP;
370
371get_ea_exit:
372 kfree(full_path);
373 free_xid(xid);
374 cifs_put_tlink(tlink);
375#endif
376 return rc;
377}
378
379ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
380{
381 ssize_t rc = -EOPNOTSUPP;
382#ifdef CONFIG_CIFS_XATTR
383 unsigned int xid;
384 struct cifs_sb_info *cifs_sb;
385 struct tcon_link *tlink;
386 struct cifs_tcon *pTcon;
387 struct super_block *sb;
388 char *full_path;
389
390 if (direntry == NULL)
391 return -EIO;
392 if (direntry->d_inode == NULL)
393 return -EIO;
394 sb = direntry->d_inode->i_sb;
395 if (sb == NULL)
396 return -EIO;
397
398 cifs_sb = CIFS_SB(sb);
399 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
400 return -EOPNOTSUPP;
401
402 tlink = cifs_sb_tlink(cifs_sb);
403 if (IS_ERR(tlink))
404 return PTR_ERR(tlink);
405 pTcon = tlink_tcon(tlink);
406
407 xid = get_xid();
408
409 full_path = build_path_from_dentry(direntry);
410 if (full_path == NULL) {
411 rc = -ENOMEM;
412 goto list_ea_exit;
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
418 search server for EAs or streams to
419 returns as xattrs */
420
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);
426list_ea_exit:
427 kfree(full_path);
428 free_xid(xid);
429 cifs_put_tlink(tlink);
430#endif
431 return rc;
432}
1/*
2 * fs/cifs/xattr.c
3 *
4 * Copyright (c) International Business Machines Corp., 2003, 2007
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>
24#include <linux/slab.h>
25#include <linux/xattr.h>
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"
34#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"
35
36/* BB need to add server (Samba e.g) support for security and trusted prefix */
37
38int cifs_removexattr(struct dentry *direntry, const char *ea_name)
39{
40 int rc = -EOPNOTSUPP;
41#ifdef CONFIG_CIFS_XATTR
42 int xid;
43 struct cifs_sb_info *cifs_sb;
44 struct tcon_link *tlink;
45 struct cifs_tcon *pTcon;
46 struct super_block *sb;
47 char *full_path = NULL;
48
49 if (direntry == NULL)
50 return -EIO;
51 if (direntry->d_inode == NULL)
52 return -EIO;
53 sb = direntry->d_inode->i_sb;
54 if (sb == NULL)
55 return -EIO;
56
57 cifs_sb = CIFS_SB(sb);
58 tlink = cifs_sb_tlink(cifs_sb);
59 if (IS_ERR(tlink))
60 return PTR_ERR(tlink);
61 pTcon = tlink_tcon(tlink);
62
63 xid = GetXid();
64
65 full_path = build_path_from_dentry(direntry);
66 if (full_path == NULL) {
67 rc = -ENOMEM;
68 goto remove_ea_exit;
69 }
70 if (ea_name == NULL) {
71 cFYI(1, "Null xattr names not supported");
72 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
73 && (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
74 cFYI(1,
75 "illegal xattr request %s (only user namespace supported)",
76 ea_name);
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 {
81 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
82 goto remove_ea_exit;
83
84 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
85 rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL,
86 (__u16)0, cifs_sb->local_nls,
87 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
88 }
89remove_ea_exit:
90 kfree(full_path);
91 FreeXid(xid);
92 cifs_put_tlink(tlink);
93#endif
94 return rc;
95}
96
97int cifs_setxattr(struct dentry *direntry, const char *ea_name,
98 const void *ea_value, size_t value_size, int flags)
99{
100 int rc = -EOPNOTSUPP;
101#ifdef CONFIG_CIFS_XATTR
102 int xid;
103 struct cifs_sb_info *cifs_sb;
104 struct tcon_link *tlink;
105 struct cifs_tcon *pTcon;
106 struct super_block *sb;
107 char *full_path;
108
109 if (direntry == NULL)
110 return -EIO;
111 if (direntry->d_inode == NULL)
112 return -EIO;
113 sb = direntry->d_inode->i_sb;
114 if (sb == NULL)
115 return -EIO;
116
117 cifs_sb = CIFS_SB(sb);
118 tlink = cifs_sb_tlink(cifs_sb);
119 if (IS_ERR(tlink))
120 return PTR_ERR(tlink);
121 pTcon = tlink_tcon(tlink);
122
123 xid = GetXid();
124
125 full_path = build_path_from_dentry(direntry);
126 if (full_path == NULL) {
127 rc = -ENOMEM;
128 goto set_ea_exit;
129 }
130 /* return dos attributes as pseudo xattr */
131 /* return alt name if available as pseudo attr */
132
133 /* if proc/fs/cifs/streamstoxattr is set then
134 search server for EAs or streams to
135 returns as xattrs */
136 if (value_size > MAX_EA_VALUE_SIZE) {
137 cFYI(1, "size of EA value too large");
138 rc = -EOPNOTSUPP;
139 goto set_ea_exit;
140 }
141
142 if (ea_name == NULL) {
143 cFYI(1, "Null xattr names not supported");
144 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
145 == 0) {
146 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
147 goto set_ea_exit;
148 if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
149 cFYI(1, "attempt to set cifs inode metadata");
150
151 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
152 rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
153 (__u16)value_size, cifs_sb->local_nls,
154 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
155 } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
156 == 0) {
157 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
158 goto set_ea_exit;
159
160 ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
161 rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
162 (__u16)value_size, cifs_sb->local_nls,
163 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
164 } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
165 strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
166#ifdef CONFIG_CIFS_ACL
167 struct cifs_ntsd *pacl;
168 pacl = kmalloc(value_size, GFP_KERNEL);
169 if (!pacl) {
170 cFYI(1, "%s: Can't allocate memory for ACL",
171 __func__);
172 rc = -ENOMEM;
173 } else {
174 memcpy(pacl, ea_value, value_size);
175 rc = set_cifs_acl(pacl, value_size,
176 direntry->d_inode, full_path, CIFS_ACL_DACL);
177 if (rc == 0) /* force revalidate of the inode */
178 CIFS_I(direntry->d_inode)->time = 0;
179 kfree(pacl);
180 }
181#else
182 cFYI(1, "Set CIFS ACL not supported yet");
183#endif /* CONFIG_CIFS_ACL */
184 } else {
185 int temp;
186 temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
187 strlen(POSIX_ACL_XATTR_ACCESS));
188 if (temp == 0) {
189#ifdef CONFIG_CIFS_POSIX
190 if (sb->s_flags & MS_POSIXACL)
191 rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
192 ea_value, (const int)value_size,
193 ACL_TYPE_ACCESS, cifs_sb->local_nls,
194 cifs_sb->mnt_cifs_flags &
195 CIFS_MOUNT_MAP_SPECIAL_CHR);
196 cFYI(1, "set POSIX ACL rc %d", rc);
197#else
198 cFYI(1, "set POSIX ACL not supported");
199#endif
200 } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
201 strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
202#ifdef CONFIG_CIFS_POSIX
203 if (sb->s_flags & MS_POSIXACL)
204 rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
205 ea_value, (const int)value_size,
206 ACL_TYPE_DEFAULT, cifs_sb->local_nls,
207 cifs_sb->mnt_cifs_flags &
208 CIFS_MOUNT_MAP_SPECIAL_CHR);
209 cFYI(1, "set POSIX default ACL rc %d", rc);
210#else
211 cFYI(1, "set default POSIX ACL not supported");
212#endif
213 } else {
214 cFYI(1, "illegal xattr request %s (only user namespace"
215 " supported)", ea_name);
216 /* BB what if no namespace prefix? */
217 /* Should we just pass them to server, except for
218 system and perhaps security prefixes? */
219 }
220 }
221
222set_ea_exit:
223 kfree(full_path);
224 FreeXid(xid);
225 cifs_put_tlink(tlink);
226#endif
227 return rc;
228}
229
230ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
231 void *ea_value, size_t buf_size)
232{
233 ssize_t rc = -EOPNOTSUPP;
234#ifdef CONFIG_CIFS_XATTR
235 int xid;
236 struct cifs_sb_info *cifs_sb;
237 struct tcon_link *tlink;
238 struct cifs_tcon *pTcon;
239 struct super_block *sb;
240 char *full_path;
241
242 if (direntry == NULL)
243 return -EIO;
244 if (direntry->d_inode == NULL)
245 return -EIO;
246 sb = direntry->d_inode->i_sb;
247 if (sb == NULL)
248 return -EIO;
249
250 cifs_sb = CIFS_SB(sb);
251 tlink = cifs_sb_tlink(cifs_sb);
252 if (IS_ERR(tlink))
253 return PTR_ERR(tlink);
254 pTcon = tlink_tcon(tlink);
255
256 xid = GetXid();
257
258 full_path = build_path_from_dentry(direntry);
259 if (full_path == NULL) {
260 rc = -ENOMEM;
261 goto get_ea_exit;
262 }
263 /* return dos attributes as pseudo xattr */
264 /* return alt name if available as pseudo attr */
265 if (ea_name == NULL) {
266 cFYI(1, "Null xattr names not supported");
267 } else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
268 == 0) {
269 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
270 goto get_ea_exit;
271
272 if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0) {
273 cFYI(1, "attempt to query cifs inode metadata");
274 /* revalidate/getattr then populate from inode */
275 } /* BB add else when above is implemented */
276 ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
277 rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
278 buf_size, cifs_sb->local_nls,
279 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
280 } else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) {
281 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
282 goto get_ea_exit;
283
284 ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
285 rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
286 buf_size, cifs_sb->local_nls,
287 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
288 } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
289 strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
290#ifdef CONFIG_CIFS_POSIX
291 if (sb->s_flags & MS_POSIXACL)
292 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
293 ea_value, buf_size, ACL_TYPE_ACCESS,
294 cifs_sb->local_nls,
295 cifs_sb->mnt_cifs_flags &
296 CIFS_MOUNT_MAP_SPECIAL_CHR);
297#else
298 cFYI(1, "Query POSIX ACL not supported yet");
299#endif /* CONFIG_CIFS_POSIX */
300 } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
301 strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
302#ifdef CONFIG_CIFS_POSIX
303 if (sb->s_flags & MS_POSIXACL)
304 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
305 ea_value, buf_size, ACL_TYPE_DEFAULT,
306 cifs_sb->local_nls,
307 cifs_sb->mnt_cifs_flags &
308 CIFS_MOUNT_MAP_SPECIAL_CHR);
309#else
310 cFYI(1, "Query POSIX default ACL not supported yet");
311#endif /* CONFIG_CIFS_POSIX */
312 } else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
313 strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
314#ifdef CONFIG_CIFS_ACL
315 u32 acllen;
316 struct cifs_ntsd *pacl;
317
318 pacl = get_cifs_acl(cifs_sb, direntry->d_inode,
319 full_path, &acllen);
320 if (IS_ERR(pacl)) {
321 rc = PTR_ERR(pacl);
322 cERROR(1, "%s: error %zd getting sec desc",
323 __func__, rc);
324 } else {
325 if (ea_value) {
326 if (acllen > buf_size)
327 acllen = -ERANGE;
328 else
329 memcpy(ea_value, pacl, acllen);
330 }
331 rc = acllen;
332 kfree(pacl);
333 }
334#else
335 cFYI(1, "Query CIFS ACL not supported yet");
336#endif /* CONFIG_CIFS_ACL */
337 } else if (strncmp(ea_name,
338 XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) {
339 cFYI(1, "Trusted xattr namespace not supported yet");
340 } else if (strncmp(ea_name,
341 XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) {
342 cFYI(1, "Security xattr namespace not supported yet");
343 } else
344 cFYI(1,
345 "illegal xattr request %s (only user namespace supported)",
346 ea_name);
347
348 /* We could add an additional check for streams ie
349 if proc/fs/cifs/streamstoxattr is set then
350 search server for EAs or streams to
351 returns as xattrs */
352
353 if (rc == -EINVAL)
354 rc = -EOPNOTSUPP;
355
356get_ea_exit:
357 kfree(full_path);
358 FreeXid(xid);
359 cifs_put_tlink(tlink);
360#endif
361 return rc;
362}
363
364ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
365{
366 ssize_t rc = -EOPNOTSUPP;
367#ifdef CONFIG_CIFS_XATTR
368 int xid;
369 struct cifs_sb_info *cifs_sb;
370 struct tcon_link *tlink;
371 struct cifs_tcon *pTcon;
372 struct super_block *sb;
373 char *full_path;
374
375 if (direntry == NULL)
376 return -EIO;
377 if (direntry->d_inode == NULL)
378 return -EIO;
379 sb = direntry->d_inode->i_sb;
380 if (sb == NULL)
381 return -EIO;
382
383 cifs_sb = CIFS_SB(sb);
384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
385 return -EOPNOTSUPP;
386
387 tlink = cifs_sb_tlink(cifs_sb);
388 if (IS_ERR(tlink))
389 return PTR_ERR(tlink);
390 pTcon = tlink_tcon(tlink);
391
392 xid = GetXid();
393
394 full_path = build_path_from_dentry(direntry);
395 if (full_path == NULL) {
396 rc = -ENOMEM;
397 goto list_ea_exit;
398 }
399 /* return dos attributes as pseudo xattr */
400 /* return alt name if available as pseudo attr */
401
402 /* if proc/fs/cifs/streamstoxattr is set then
403 search server for EAs or streams to
404 returns as xattrs */
405 rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
406 buf_size, cifs_sb->local_nls,
407 cifs_sb->mnt_cifs_flags &
408 CIFS_MOUNT_MAP_SPECIAL_CHR);
409
410list_ea_exit:
411 kfree(full_path);
412 FreeXid(xid);
413 cifs_put_tlink(tlink);
414#endif
415 return rc;
416}