fs/cifs/xattr.c



1da177e4c3f4


79a58d1f6075
1da177e4c3f4


5a0e3ad6af86
f995e7408740
1da177e4c3f4


fbeba8bb16d7
1da177e4c3f4
f995e7408740
1da177e4c3f4
79a58d1f6075
1da177e4c3f4


7ffec372458d
96daf2b09178
79a58d1f6075
7ffec372458d
79a58d1f6075

1da177e4c3f4
79a58d1f6075
1da177e4c3f4

79a58d1f6075
1da177e4c3f4
79a58d1f6075
1da177e4c3f4
7ffec372458d


79a58d1f6075
1da177e4c3f4
79a58d1f6075
0f3bc09ee1b7
7ffec372458d
1da177e4c3f4
79a58d1f6075
b6b38f704a81
f995e7408740

79a58d1f6075
b6b38f704a81

1da177e4c3f4


79a58d1f6075
1da177e4c3f4

f995e7408740
79a58d1f6075
737b758c965a

1da177e4c3f4

f99d49adf527
1da177e4c3f4
7ffec372458d
1da177e4c3f4


79a58d1f6075

1da177e4c3f4


7ffec372458d
96daf2b09178
79a58d1f6075

b73b9a4ba753
1da177e4c3f4
79a58d1f6075
1da177e4c3f4
79a58d1f6075
1da177e4c3f4

79a58d1f6075
1da177e4c3f4
1da177e4c3f4

7ffec372458d


1da177e4c3f4
1da177e4c3f4
79a58d1f6075
0f3bc09ee1b7
7ffec372458d
1da177e4c3f4


79a58d1f6075
1da177e4c3f4
79a58d1f6075
b6b38f704a81
7ffec372458d

1da177e4c3f4

79a58d1f6075
b6b38f704a81
f995e7408740

79a58d1f6075
1da177e4c3f4
ad7a2926b9e5
b6b38f704a81
ad7a2926b9e5
f995e7408740
79a58d1f6075
737b758c965a

f995e7408740

79a58d1f6075
1da177e4c3f4

f995e7408740
79a58d1f6075
737b758c965a

b73b9a4ba753


a5ff376966c0
b73b9a4ba753


1da177e4c3f4
79a58d1f6075

1da177e4c3f4


79a58d1f6075


737b758c965a
b6b38f704a81
1da177e4c3f4
b6b38f704a81
1da177e4c3f4
79a58d1f6075

1da177e4c3f4
79a58d1f6075


737b758c965a
79a58d1f6075
737b758c965a
b6b38f704a81
1da177e4c3f4
b6b38f704a81
1da177e4c3f4

b6b38f704a81

1da177e4c3f4
79a58d1f6075
1da177e4c3f4


f99d49adf527
1da177e4c3f4
7ffec372458d
1da177e4c3f4


79a58d1f6075

1da177e4c3f4


7ffec372458d
96daf2b09178
79a58d1f6075

1da177e4c3f4
79a58d1f6075
1da177e4c3f4
79a58d1f6075
1da177e4c3f4

79a58d1f6075
1da177e4c3f4

1da177e4c3f4
7ffec372458d


1da177e4c3f4
1da177e4c3f4
79a58d1f6075
0f3bc09ee1b7
7ffec372458d
1da177e4c3f4


79a58d1f6075
b6b38f704a81
f995e7408740

79a58d1f6075
1da177e4c3f4

79a58d1f6075
b6b38f704a81
1da177e4c3f4

f995e7408740
31c0519f7af9
737b758c965a

f995e7408740
79a58d1f6075
1da177e4c3f4

f995e7408740
31c0519f7af9
737b758c965a

79a58d1f6075
0a4b92c05ed0
1da177e4c3f4
79a58d1f6075
1da0c78b32ab
79a58d1f6075
737b758c965a
79a58d1f6075
737b758c965a
79a58d1f6075
fbeba8bb16d7
1da177e4c3f4
79a58d1f6075
0a4b92c05ed0
1da177e4c3f4
79a58d1f6075
1da0c78b32ab
79a58d1f6075
737b758c965a
79a58d1f6075
737b758c965a
79a58d1f6075
fbeba8bb16d7


79a58d1f6075
f995e7408740
b6b38f704a81
79a58d1f6075
f995e7408740
b6b38f704a81
ad7a2926b9e5
79a58d1f6075
b6b38f704a81

1da177e4c3f4
79a58d1f6075
1da177e4c3f4
79a58d1f6075
1da177e4c3f4

79a58d1f6075

1da177e4c3f4

f99d49adf527
1da177e4c3f4
7ffec372458d
1da177e4c3f4


79a58d1f6075
1da177e4c3f4


7ffec372458d
96daf2b09178
79a58d1f6075

1da177e4c3f4
79a58d1f6075
1da177e4c3f4
79a58d1f6075
1da177e4c3f4

79a58d1f6075
1da177e4c3f4
1da177e4c3f4

79a58d1f6075
ea4c07d780a6

7ffec372458d


ea4c07d780a6

1da177e4c3f4
79a58d1f6075
0f3bc09ee1b7
7ffec372458d
1da177e4c3f4


79a58d1f6075
1da177e4c3f4
31c0519f7af9

79a58d1f6075
737b758c965a
1da177e4c3f4
7ffec372458d
f99d49adf527
1da177e4c3f4
7ffec372458d
1da177e4c3f4


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416


/*
 *   fs/cifs/xattr.c
 *
 *   Copyright (c) International Business Machines  Corp., 2003, 2007
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/fs.h>
#include <linux/posix_acl_xattr.h>
#include <linux/slab.h>
#include <linux/xattr.h>
#include "cifsfs.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_debug.h"

#define MAX_EA_VALUE_SIZE 65535
#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
#define CIFS_XATTR_CIFS_ACL "system.cifs_acl"

/* BB need to add server (Samba e.g) support for security and trusted prefix */

int cifs_removexattr(struct dentry *direntry, const char *ea_name)
{
	int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct tcon_link *tlink;
	struct cifs_tcon *pTcon;
	struct super_block *sb;
	char *full_path = NULL;

	if (direntry == NULL)
		return -EIO;
	if (direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if (sb == NULL)
		return -EIO;

	cifs_sb = CIFS_SB(sb);
	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = GetXid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto remove_ea_exit;
	}
	if (ea_name == NULL) {
		cFYI(1, "Null xattr names not supported");
	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
		&& (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN))) {
		cFYI(1,
		     "illegal xattr request %s (only user namespace supported)",
		     ea_name);
		/* BB what if no namespace prefix? */
		/* Should we just pass them to server, except for
		system and perhaps security prefixes? */
	} else {
		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto remove_ea_exit;

		ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
		rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, NULL,
			(__u16)0, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	}
remove_ea_exit:
	kfree(full_path);
	FreeXid(xid);
	cifs_put_tlink(tlink);
#endif
	return rc;
}

int cifs_setxattr(struct dentry *direntry, const char *ea_name,
		  const void *ea_value, size_t value_size, int flags)
{
	int rc = -EOPNOTSUPP;
#ifdef CONFIG_CIFS_XATTR
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct tcon_link *tlink;
	struct cifs_tcon *pTcon;
	struct super_block *sb;
	char *full_path;
	struct cifs_ntsd *pacl;

	if (direntry == NULL)
		return -EIO;
	if (direntry->d_inode == NULL)
		return -EIO;
	sb = direntry->d_inode->i_sb;
	if (sb == NULL)
		return -EIO;

	cifs_sb = CIFS_SB(sb);
	tlink = cifs_sb_tlink(cifs_sb);
	if (IS_ERR(tlink))
		return PTR_ERR(tlink);
	pTcon = tlink_tcon(tlink);

	xid = GetXid();

	full_path = build_path_from_dentry(direntry);
	if (full_path == NULL) {
		rc = -ENOMEM;
		goto set_ea_exit;
	}
	/* return dos attributes as pseudo xattr */
	/* return alt name if available as pseudo attr */

	/* if proc/fs/cifs/streamstoxattr is set then
		search server for EAs or streams to
		returns as xattrs */
	if (value_size > MAX_EA_VALUE_SIZE) {
		cFYI(1, "size of EA value too large");
		rc = -EOPNOTSUPP;
		goto set_ea_exit;
	}

	if (ea_name == NULL) {
		cFYI(1, "Null xattr names not supported");
	} else if (strncmp(ea_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)
		   == 0) {
		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto set_ea_exit;
		if (strncmp(ea_name, CIFS_XATTR_DOS_ATTRIB, 14) == 0)
			cFYI(1, "attempt to set cifs inode metadata");

		ea_name += XATTR_USER_PREFIX_LEN; /* skip past user. prefix */
		rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
			(__u16)value_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else if (strncmp(ea_name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)
		   == 0) {
		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
			goto set_ea_exit;

		ea_name += XATTR_OS2_PREFIX_LEN; /* skip past os2. prefix */
		rc = CIFSSMBSetEA(xid, pTcon, full_path, ea_name, ea_value,
			(__u16)value_size, cifs_sb->local_nls,
			cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
	} else if (strncmp(ea_name, CIFS_XATTR_CIFS_ACL,
			strlen(CIFS_XATTR_CIFS_ACL)) == 0) {
		pacl = kmalloc(value_size, GFP_KERNEL);
		if (!pacl) {