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1// SPDX-License-Identifier: LGPL-2.1
2/*
3 *
4 * Copyright (c) International Business Machines Corp., 2003, 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 */
8
9#include <linux/fs.h>
10#include <linux/posix_acl_xattr.h>
11#include <linux/slab.h>
12#include <linux/xattr.h>
13#include "cifsfs.h"
14#include "cifspdu.h"
15#include "cifsglob.h"
16#include "cifsproto.h"
17#include "cifs_debug.h"
18#include "cifs_fs_sb.h"
19#include "cifs_unicode.h"
20#include "cifs_ioctl.h"
21
22#define MAX_EA_VALUE_SIZE CIFSMaxBufSize
23#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */
24#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */
25#define CIFS_XATTR_CIFS_NTSD_FULL "system.cifs_ntsd_full" /* owner/DACL/SACL */
26#define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */
27#define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */
28/*
29 * Although these three are just aliases for the above, need to move away from
30 * confusing users and using the 20+ year old term 'cifs' when it is no longer
31 * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago
32 */
33#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */
34#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */
35#define SMB3_XATTR_CIFS_NTSD_FULL "system.smb3_ntsd_full" /* owner/DACL/SACL */
36#define SMB3_XATTR_ATTRIB "smb3.dosattrib" /* full name: user.smb3.dosattrib */
37#define SMB3_XATTR_CREATETIME "smb3.creationtime" /* user.smb3.creationtime */
38/* BB need to add server (Samba e.g) support for security and trusted prefix */
39
40enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT,
41 XATTR_CIFS_NTSD, XATTR_CIFS_NTSD_FULL };
42
43static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon,
44 struct inode *inode, const char *full_path,
45 const void *value, size_t size)
46{
47 ssize_t rc = -EOPNOTSUPP;
48 __u32 *pattrib = (__u32 *)value;
49 __u32 attrib;
50 FILE_BASIC_INFO info_buf;
51
52 if ((value == NULL) || (size != sizeof(__u32)))
53 return -ERANGE;
54
55 memset(&info_buf, 0, sizeof(info_buf));
56 attrib = *pattrib;
57 info_buf.Attributes = cpu_to_le32(attrib);
58 if (pTcon->ses->server->ops->set_file_info)
59 rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
60 &info_buf, xid);
61 if (rc == 0)
62 CIFS_I(inode)->cifsAttrs = attrib;
63
64 return rc;
65}
66
67static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon,
68 struct inode *inode, const char *full_path,
69 const void *value, size_t size)
70{
71 ssize_t rc = -EOPNOTSUPP;
72 __u64 *pcreation_time = (__u64 *)value;
73 __u64 creation_time;
74 FILE_BASIC_INFO info_buf;
75
76 if ((value == NULL) || (size != sizeof(__u64)))
77 return -ERANGE;
78
79 memset(&info_buf, 0, sizeof(info_buf));
80 creation_time = *pcreation_time;
81 info_buf.CreationTime = cpu_to_le64(creation_time);
82 if (pTcon->ses->server->ops->set_file_info)
83 rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
84 &info_buf, xid);
85 if (rc == 0)
86 CIFS_I(inode)->createtime = creation_time;
87
88 return rc;
89}
90
91static int cifs_xattr_set(const struct xattr_handler *handler,
92 struct user_namespace *mnt_userns,
93 struct dentry *dentry, struct inode *inode,
94 const char *name, const void *value,
95 size_t size, int flags)
96{
97 int rc = -EOPNOTSUPP;
98 unsigned int xid;
99 struct super_block *sb = dentry->d_sb;
100 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
101 struct tcon_link *tlink;
102 struct cifs_tcon *pTcon;
103 const char *full_path;
104 void *page;
105
106 tlink = cifs_sb_tlink(cifs_sb);
107 if (IS_ERR(tlink))
108 return PTR_ERR(tlink);
109 pTcon = tlink_tcon(tlink);
110
111 xid = get_xid();
112 page = alloc_dentry_path();
113
114 full_path = build_path_from_dentry(dentry, page);
115 if (IS_ERR(full_path)) {
116 rc = PTR_ERR(full_path);
117 goto out;
118 }
119 /* return dos attributes as pseudo xattr */
120 /* return alt name if available as pseudo attr */
121
122 /* if proc/fs/cifs/streamstoxattr is set then
123 search server for EAs or streams to
124 returns as xattrs */
125 if (size > MAX_EA_VALUE_SIZE) {
126 cifs_dbg(FYI, "size of EA value too large\n");
127 rc = -EOPNOTSUPP;
128 goto out;
129 }
130
131 switch (handler->flags) {
132 case XATTR_USER:
133 cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name);
134 if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
135 (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
136 rc = cifs_attrib_set(xid, pTcon, inode, full_path,
137 value, size);
138 if (rc == 0) /* force revalidate of the inode */
139 CIFS_I(inode)->time = 0;
140 break;
141 } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
142 (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
143 rc = cifs_creation_time_set(xid, pTcon, inode,
144 full_path, value, size);
145 if (rc == 0) /* force revalidate of the inode */
146 CIFS_I(inode)->time = 0;
147 break;
148 }
149
150 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
151 goto out;
152
153 if (pTcon->ses->server->ops->set_EA)
154 rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
155 full_path, name, value, (__u16)size,
156 cifs_sb->local_nls, cifs_sb);
157 break;
158
159 case XATTR_CIFS_ACL:
160 case XATTR_CIFS_NTSD:
161 case XATTR_CIFS_NTSD_FULL: {
162 struct cifs_ntsd *pacl;
163
164 if (!value)
165 goto out;
166 pacl = kmalloc(size, GFP_KERNEL);
167 if (!pacl) {
168 rc = -ENOMEM;
169 } else {
170 memcpy(pacl, value, size);
171 if (pTcon->ses->server->ops->set_acl) {
172 int aclflags = 0;
173 rc = 0;
174
175 switch (handler->flags) {
176 case XATTR_CIFS_NTSD_FULL:
177 aclflags = (CIFS_ACL_OWNER |
178 CIFS_ACL_GROUP |
179 CIFS_ACL_DACL |
180 CIFS_ACL_SACL);
181 break;
182 case XATTR_CIFS_NTSD:
183 aclflags = (CIFS_ACL_OWNER |
184 CIFS_ACL_GROUP |
185 CIFS_ACL_DACL);
186 break;
187 case XATTR_CIFS_ACL:
188 default:
189 aclflags = CIFS_ACL_DACL;
190 }
191
192 rc = pTcon->ses->server->ops->set_acl(pacl,
193 size, inode, full_path, aclflags);
194 } else {
195 rc = -EOPNOTSUPP;
196 }
197 if (rc == 0) /* force revalidate of the inode */
198 CIFS_I(inode)->time = 0;
199 kfree(pacl);
200 }
201 break;
202 }
203 }
204
205out:
206 free_dentry_path(page);
207 free_xid(xid);
208 cifs_put_tlink(tlink);
209 return rc;
210}
211
212static int cifs_attrib_get(struct dentry *dentry,
213 struct inode *inode, void *value,
214 size_t size)
215{
216 ssize_t rc;
217 __u32 *pattribute;
218
219 rc = cifs_revalidate_dentry_attr(dentry);
220
221 if (rc)
222 return rc;
223
224 if ((value == NULL) || (size == 0))
225 return sizeof(__u32);
226 else if (size < sizeof(__u32))
227 return -ERANGE;
228
229 /* return dos attributes as pseudo xattr */
230 pattribute = (__u32 *)value;
231 *pattribute = CIFS_I(inode)->cifsAttrs;
232
233 return sizeof(__u32);
234}
235
236static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode,
237 void *value, size_t size)
238{
239 ssize_t rc;
240 __u64 *pcreatetime;
241
242 rc = cifs_revalidate_dentry_attr(dentry);
243 if (rc)
244 return rc;
245
246 if ((value == NULL) || (size == 0))
247 return sizeof(__u64);
248 else if (size < sizeof(__u64))
249 return -ERANGE;
250
251 /* return dos attributes as pseudo xattr */
252 pcreatetime = (__u64 *)value;
253 *pcreatetime = CIFS_I(inode)->createtime;
254 return sizeof(__u64);
255}
256
257
258static int cifs_xattr_get(const struct xattr_handler *handler,
259 struct dentry *dentry, struct inode *inode,
260 const char *name, void *value, size_t size)
261{
262 ssize_t rc = -EOPNOTSUPP;
263 unsigned int xid;
264 struct super_block *sb = dentry->d_sb;
265 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
266 struct tcon_link *tlink;
267 struct cifs_tcon *pTcon;
268 const char *full_path;
269 void *page;
270
271 tlink = cifs_sb_tlink(cifs_sb);
272 if (IS_ERR(tlink))
273 return PTR_ERR(tlink);
274 pTcon = tlink_tcon(tlink);
275
276 xid = get_xid();
277 page = alloc_dentry_path();
278
279 full_path = build_path_from_dentry(dentry, page);
280 if (IS_ERR(full_path)) {
281 rc = PTR_ERR(full_path);
282 goto out;
283 }
284
285 /* return alt name if available as pseudo attr */
286 switch (handler->flags) {
287 case XATTR_USER:
288 cifs_dbg(FYI, "%s:querying user xattr %s\n", __func__, name);
289 if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
290 (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
291 rc = cifs_attrib_get(dentry, inode, value, size);
292 break;
293 } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
294 (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
295 rc = cifs_creation_time_get(dentry, inode, value, size);
296 break;
297 }
298
299 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
300 goto out;
301
302 if (pTcon->ses->server->ops->query_all_EAs)
303 rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
304 full_path, name, value, size, cifs_sb);
305 break;
306
307 case XATTR_CIFS_ACL:
308 case XATTR_CIFS_NTSD:
309 case XATTR_CIFS_NTSD_FULL: {
310 /*
311 * fetch owner, DACL, and SACL if asked for full descriptor,
312 * fetch owner and DACL otherwise
313 */
314 u32 acllen, extra_info;
315 struct cifs_ntsd *pacl;
316
317 if (pTcon->ses->server->ops->get_acl == NULL)
318 goto out; /* rc already EOPNOTSUPP */
319
320 if (handler->flags == XATTR_CIFS_NTSD_FULL) {
321 extra_info = SACL_SECINFO;
322 } else {
323 extra_info = 0;
324 }
325 pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
326 inode, full_path, &acllen, extra_info);
327 if (IS_ERR(pacl)) {
328 rc = PTR_ERR(pacl);
329 cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
330 __func__, rc);
331 } else {
332 if (value) {
333 if (acllen > size)
334 acllen = -ERANGE;
335 else
336 memcpy(value, pacl, acllen);
337 }
338 rc = acllen;
339 kfree(pacl);
340 }
341 break;
342 }
343 }
344
345 /* We could add an additional check for streams ie
346 if proc/fs/cifs/streamstoxattr is set then
347 search server for EAs or streams to
348 returns as xattrs */
349
350 if (rc == -EINVAL)
351 rc = -EOPNOTSUPP;
352
353out:
354 free_dentry_path(page);
355 free_xid(xid);
356 cifs_put_tlink(tlink);
357 return rc;
358}
359
360ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
361{
362 ssize_t rc = -EOPNOTSUPP;
363 unsigned int xid;
364 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
365 struct tcon_link *tlink;
366 struct cifs_tcon *pTcon;
367 const char *full_path;
368 void *page;
369
370 if (unlikely(cifs_forced_shutdown(cifs_sb)))
371 return -EIO;
372
373 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
374 return -EOPNOTSUPP;
375
376 tlink = cifs_sb_tlink(cifs_sb);
377 if (IS_ERR(tlink))
378 return PTR_ERR(tlink);
379 pTcon = tlink_tcon(tlink);
380
381 xid = get_xid();
382 page = alloc_dentry_path();
383
384 full_path = build_path_from_dentry(direntry, page);
385 if (IS_ERR(full_path)) {
386 rc = PTR_ERR(full_path);
387 goto list_ea_exit;
388 }
389 /* return dos attributes as pseudo xattr */
390 /* return alt name if available as pseudo attr */
391
392 /* if proc/fs/cifs/streamstoxattr is set then
393 search server for EAs or streams to
394 returns as xattrs */
395
396 if (pTcon->ses->server->ops->query_all_EAs)
397 rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
398 full_path, NULL, data, buf_size, cifs_sb);
399list_ea_exit:
400 free_dentry_path(page);
401 free_xid(xid);
402 cifs_put_tlink(tlink);
403 return rc;
404}
405
406static const struct xattr_handler cifs_user_xattr_handler = {
407 .prefix = XATTR_USER_PREFIX,
408 .flags = XATTR_USER,
409 .get = cifs_xattr_get,
410 .set = cifs_xattr_set,
411};
412
413/* os2.* attributes are treated like user.* attributes */
414static const struct xattr_handler cifs_os2_xattr_handler = {
415 .prefix = XATTR_OS2_PREFIX,
416 .flags = XATTR_USER,
417 .get = cifs_xattr_get,
418 .set = cifs_xattr_set,
419};
420
421static const struct xattr_handler cifs_cifs_acl_xattr_handler = {
422 .name = CIFS_XATTR_CIFS_ACL,
423 .flags = XATTR_CIFS_ACL,
424 .get = cifs_xattr_get,
425 .set = cifs_xattr_set,
426};
427
428/*
429 * Although this is just an alias for the above, need to move away from
430 * confusing users and using the 20 year old term 'cifs' when it is no
431 * longer secure and was replaced by SMB2/SMB3 a long time ago, and
432 * SMB3 and later are highly secure.
433 */
434static const struct xattr_handler smb3_acl_xattr_handler = {
435 .name = SMB3_XATTR_CIFS_ACL,
436 .flags = XATTR_CIFS_ACL,
437 .get = cifs_xattr_get,
438 .set = cifs_xattr_set,
439};
440
441static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = {
442 .name = CIFS_XATTR_CIFS_NTSD,
443 .flags = XATTR_CIFS_NTSD,
444 .get = cifs_xattr_get,
445 .set = cifs_xattr_set,
446};
447
448/*
449 * Although this is just an alias for the above, need to move away from
450 * confusing users and using the 20 year old term 'cifs' when it is no
451 * longer secure and was replaced by SMB2/SMB3 a long time ago, and
452 * SMB3 and later are highly secure.
453 */
454static const struct xattr_handler smb3_ntsd_xattr_handler = {
455 .name = SMB3_XATTR_CIFS_NTSD,
456 .flags = XATTR_CIFS_NTSD,
457 .get = cifs_xattr_get,
458 .set = cifs_xattr_set,
459};
460
461static const struct xattr_handler cifs_cifs_ntsd_full_xattr_handler = {
462 .name = CIFS_XATTR_CIFS_NTSD_FULL,
463 .flags = XATTR_CIFS_NTSD_FULL,
464 .get = cifs_xattr_get,
465 .set = cifs_xattr_set,
466};
467
468/*
469 * Although this is just an alias for the above, need to move away from
470 * confusing users and using the 20 year old term 'cifs' when it is no
471 * longer secure and was replaced by SMB2/SMB3 a long time ago, and
472 * SMB3 and later are highly secure.
473 */
474static const struct xattr_handler smb3_ntsd_full_xattr_handler = {
475 .name = SMB3_XATTR_CIFS_NTSD_FULL,
476 .flags = XATTR_CIFS_NTSD_FULL,
477 .get = cifs_xattr_get,
478 .set = cifs_xattr_set,
479};
480
481const struct xattr_handler *cifs_xattr_handlers[] = {
482 &cifs_user_xattr_handler,
483 &cifs_os2_xattr_handler,
484 &cifs_cifs_acl_xattr_handler,
485 &smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */
486 &cifs_cifs_ntsd_xattr_handler,
487 &smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */
488 &cifs_cifs_ntsd_full_xattr_handler,
489 &smb3_ntsd_full_xattr_handler, /* alias for above since avoiding "cifs" */
490#ifdef CONFIG_FS_POSIX_ACL
491 &posix_acl_access_xattr_handler,
492 &posix_acl_default_xattr_handler,
493#endif
494 NULL
495};
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#include "cifs_fs_sb.h"
32#include "cifs_unicode.h"
33
34#define MAX_EA_VALUE_SIZE CIFSMaxBufSize
35#define CIFS_XATTR_CIFS_ACL "system.cifs_acl" /* DACL only */
36#define CIFS_XATTR_CIFS_NTSD "system.cifs_ntsd" /* owner plus DACL */
37#define CIFS_XATTR_ATTRIB "cifs.dosattrib" /* full name: user.cifs.dosattrib */
38#define CIFS_XATTR_CREATETIME "cifs.creationtime" /* user.cifs.creationtime */
39/*
40 * Although these three are just aliases for the above, need to move away from
41 * confusing users and using the 20+ year old term 'cifs' when it is no longer
42 * secure, replaced by SMB2 (then even more highly secure SMB3) many years ago
43 */
44#define SMB3_XATTR_CIFS_ACL "system.smb3_acl" /* DACL only */
45#define SMB3_XATTR_CIFS_NTSD "system.smb3_ntsd" /* owner plus DACL */
46#define SMB3_XATTR_ATTRIB "smb3.dosattrib" /* full name: user.smb3.dosattrib */
47#define SMB3_XATTR_CREATETIME "smb3.creationtime" /* user.smb3.creationtime */
48/* BB need to add server (Samba e.g) support for security and trusted prefix */
49
50enum { XATTR_USER, XATTR_CIFS_ACL, XATTR_ACL_ACCESS, XATTR_ACL_DEFAULT,
51 XATTR_CIFS_NTSD };
52
53static int cifs_attrib_set(unsigned int xid, struct cifs_tcon *pTcon,
54 struct inode *inode, char *full_path,
55 const void *value, size_t size)
56{
57 ssize_t rc = -EOPNOTSUPP;
58 __u32 *pattrib = (__u32 *)value;
59 __u32 attrib;
60 FILE_BASIC_INFO info_buf;
61
62 if ((value == NULL) || (size != sizeof(__u32)))
63 return -ERANGE;
64
65 memset(&info_buf, 0, sizeof(info_buf));
66 attrib = *pattrib;
67 info_buf.Attributes = cpu_to_le32(attrib);
68 if (pTcon->ses->server->ops->set_file_info)
69 rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
70 &info_buf, xid);
71 if (rc == 0)
72 CIFS_I(inode)->cifsAttrs = attrib;
73
74 return rc;
75}
76
77static int cifs_creation_time_set(unsigned int xid, struct cifs_tcon *pTcon,
78 struct inode *inode, char *full_path,
79 const void *value, size_t size)
80{
81 ssize_t rc = -EOPNOTSUPP;
82 __u64 *pcreation_time = (__u64 *)value;
83 __u64 creation_time;
84 FILE_BASIC_INFO info_buf;
85
86 if ((value == NULL) || (size != sizeof(__u64)))
87 return -ERANGE;
88
89 memset(&info_buf, 0, sizeof(info_buf));
90 creation_time = *pcreation_time;
91 info_buf.CreationTime = cpu_to_le64(creation_time);
92 if (pTcon->ses->server->ops->set_file_info)
93 rc = pTcon->ses->server->ops->set_file_info(inode, full_path,
94 &info_buf, xid);
95 if (rc == 0)
96 CIFS_I(inode)->createtime = creation_time;
97
98 return rc;
99}
100
101static int cifs_xattr_set(const struct xattr_handler *handler,
102 struct dentry *dentry, struct inode *inode,
103 const char *name, const void *value,
104 size_t size, int flags)
105{
106 int rc = -EOPNOTSUPP;
107 unsigned int xid;
108 struct super_block *sb = dentry->d_sb;
109 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
110 struct tcon_link *tlink;
111 struct cifs_tcon *pTcon;
112 char *full_path;
113
114 tlink = cifs_sb_tlink(cifs_sb);
115 if (IS_ERR(tlink))
116 return PTR_ERR(tlink);
117 pTcon = tlink_tcon(tlink);
118
119 xid = get_xid();
120
121 full_path = build_path_from_dentry(dentry);
122 if (full_path == NULL) {
123 rc = -ENOMEM;
124 goto out;
125 }
126 /* return dos attributes as pseudo xattr */
127 /* return alt name if available as pseudo attr */
128
129 /* if proc/fs/cifs/streamstoxattr is set then
130 search server for EAs or streams to
131 returns as xattrs */
132 if (size > MAX_EA_VALUE_SIZE) {
133 cifs_dbg(FYI, "size of EA value too large\n");
134 rc = -EOPNOTSUPP;
135 goto out;
136 }
137
138 switch (handler->flags) {
139 case XATTR_USER:
140 cifs_dbg(FYI, "%s:setting user xattr %s\n", __func__, name);
141 if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
142 (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
143 rc = cifs_attrib_set(xid, pTcon, inode, full_path,
144 value, size);
145 if (rc == 0) /* force revalidate of the inode */
146 CIFS_I(inode)->time = 0;
147 break;
148 } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
149 (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
150 rc = cifs_creation_time_set(xid, pTcon, inode,
151 full_path, value, size);
152 if (rc == 0) /* force revalidate of the inode */
153 CIFS_I(inode)->time = 0;
154 break;
155 }
156
157 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
158 goto out;
159
160 if (pTcon->ses->server->ops->set_EA)
161 rc = pTcon->ses->server->ops->set_EA(xid, pTcon,
162 full_path, name, value, (__u16)size,
163 cifs_sb->local_nls, cifs_sb);
164 break;
165
166 case XATTR_CIFS_ACL:
167 case XATTR_CIFS_NTSD: {
168 struct cifs_ntsd *pacl;
169
170 if (!value)
171 goto out;
172 pacl = kmalloc(size, GFP_KERNEL);
173 if (!pacl) {
174 rc = -ENOMEM;
175 } else {
176 memcpy(pacl, value, size);
177 if (value &&
178 pTcon->ses->server->ops->set_acl) {
179 rc = 0;
180 if (handler->flags == XATTR_CIFS_NTSD) {
181 /* set owner and DACL */
182 rc = pTcon->ses->server->ops->set_acl(
183 pacl, size, inode,
184 full_path,
185 CIFS_ACL_OWNER);
186 }
187 if (rc == 0) {
188 /* set DACL */
189 rc = pTcon->ses->server->ops->set_acl(
190 pacl, size, inode,
191 full_path,
192 CIFS_ACL_DACL);
193 }
194 } else {
195 rc = -EOPNOTSUPP;
196 }
197 if (rc == 0) /* force revalidate of the inode */
198 CIFS_I(inode)->time = 0;
199 kfree(pacl);
200 }
201 break;
202 }
203
204 case XATTR_ACL_ACCESS:
205#ifdef CONFIG_CIFS_POSIX
206 if (!value)
207 goto out;
208 if (sb->s_flags & SB_POSIXACL)
209 rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
210 value, (const int)size,
211 ACL_TYPE_ACCESS, cifs_sb->local_nls,
212 cifs_remap(cifs_sb));
213#endif /* CONFIG_CIFS_POSIX */
214 break;
215
216 case XATTR_ACL_DEFAULT:
217#ifdef CONFIG_CIFS_POSIX
218 if (!value)
219 goto out;
220 if (sb->s_flags & SB_POSIXACL)
221 rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
222 value, (const int)size,
223 ACL_TYPE_DEFAULT, cifs_sb->local_nls,
224 cifs_remap(cifs_sb));
225#endif /* CONFIG_CIFS_POSIX */
226 break;
227 }
228
229out:
230 kfree(full_path);
231 free_xid(xid);
232 cifs_put_tlink(tlink);
233 return rc;
234}
235
236static int cifs_attrib_get(struct dentry *dentry,
237 struct inode *inode, void *value,
238 size_t size)
239{
240 ssize_t rc;
241 __u32 *pattribute;
242
243 rc = cifs_revalidate_dentry_attr(dentry);
244
245 if (rc)
246 return rc;
247
248 if ((value == NULL) || (size == 0))
249 return sizeof(__u32);
250 else if (size < sizeof(__u32))
251 return -ERANGE;
252
253 /* return dos attributes as pseudo xattr */
254 pattribute = (__u32 *)value;
255 *pattribute = CIFS_I(inode)->cifsAttrs;
256
257 return sizeof(__u32);
258}
259
260static int cifs_creation_time_get(struct dentry *dentry, struct inode *inode,
261 void *value, size_t size)
262{
263 ssize_t rc;
264 __u64 *pcreatetime;
265
266 rc = cifs_revalidate_dentry_attr(dentry);
267 if (rc)
268 return rc;
269
270 if ((value == NULL) || (size == 0))
271 return sizeof(__u64);
272 else if (size < sizeof(__u64))
273 return -ERANGE;
274
275 /* return dos attributes as pseudo xattr */
276 pcreatetime = (__u64 *)value;
277 *pcreatetime = CIFS_I(inode)->createtime;
278 return sizeof(__u64);
279}
280
281
282static int cifs_xattr_get(const struct xattr_handler *handler,
283 struct dentry *dentry, struct inode *inode,
284 const char *name, void *value, size_t size)
285{
286 ssize_t rc = -EOPNOTSUPP;
287 unsigned int xid;
288 struct super_block *sb = dentry->d_sb;
289 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
290 struct tcon_link *tlink;
291 struct cifs_tcon *pTcon;
292 char *full_path;
293
294 tlink = cifs_sb_tlink(cifs_sb);
295 if (IS_ERR(tlink))
296 return PTR_ERR(tlink);
297 pTcon = tlink_tcon(tlink);
298
299 xid = get_xid();
300
301 full_path = build_path_from_dentry(dentry);
302 if (full_path == NULL) {
303 rc = -ENOMEM;
304 goto out;
305 }
306
307 /* return alt name if available as pseudo attr */
308 switch (handler->flags) {
309 case XATTR_USER:
310 cifs_dbg(FYI, "%s:querying user xattr %s\n", __func__, name);
311 if ((strcmp(name, CIFS_XATTR_ATTRIB) == 0) ||
312 (strcmp(name, SMB3_XATTR_ATTRIB) == 0)) {
313 rc = cifs_attrib_get(dentry, inode, value, size);
314 break;
315 } else if ((strcmp(name, CIFS_XATTR_CREATETIME) == 0) ||
316 (strcmp(name, SMB3_XATTR_CREATETIME) == 0)) {
317 rc = cifs_creation_time_get(dentry, inode, value, size);
318 break;
319 }
320
321 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
322 goto out;
323
324 if (pTcon->ses->server->ops->query_all_EAs)
325 rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
326 full_path, name, value, size, cifs_sb);
327 break;
328
329 case XATTR_CIFS_ACL:
330 case XATTR_CIFS_NTSD: {
331 /* the whole ntsd is fetched regardless */
332 u32 acllen;
333 struct cifs_ntsd *pacl;
334
335 if (pTcon->ses->server->ops->get_acl == NULL)
336 goto out; /* rc already EOPNOTSUPP */
337
338 pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
339 inode, full_path, &acllen);
340 if (IS_ERR(pacl)) {
341 rc = PTR_ERR(pacl);
342 cifs_dbg(VFS, "%s: error %zd getting sec desc\n",
343 __func__, rc);
344 } else {
345 if (value) {
346 if (acllen > size)
347 acllen = -ERANGE;
348 else
349 memcpy(value, pacl, acllen);
350 }
351 rc = acllen;
352 kfree(pacl);
353 }
354 break;
355 }
356
357 case XATTR_ACL_ACCESS:
358#ifdef CONFIG_CIFS_POSIX
359 if (sb->s_flags & SB_POSIXACL)
360 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
361 value, size, ACL_TYPE_ACCESS,
362 cifs_sb->local_nls,
363 cifs_remap(cifs_sb));
364#endif /* CONFIG_CIFS_POSIX */
365 break;
366
367 case XATTR_ACL_DEFAULT:
368#ifdef CONFIG_CIFS_POSIX
369 if (sb->s_flags & SB_POSIXACL)
370 rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
371 value, size, ACL_TYPE_DEFAULT,
372 cifs_sb->local_nls,
373 cifs_remap(cifs_sb));
374#endif /* CONFIG_CIFS_POSIX */
375 break;
376 }
377
378 /* We could add an additional check for streams ie
379 if proc/fs/cifs/streamstoxattr is set then
380 search server for EAs or streams to
381 returns as xattrs */
382
383 if (rc == -EINVAL)
384 rc = -EOPNOTSUPP;
385
386out:
387 kfree(full_path);
388 free_xid(xid);
389 cifs_put_tlink(tlink);
390 return rc;
391}
392
393ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
394{
395 ssize_t rc = -EOPNOTSUPP;
396 unsigned int xid;
397 struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
398 struct tcon_link *tlink;
399 struct cifs_tcon *pTcon;
400 char *full_path;
401
402 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
403 return -EOPNOTSUPP;
404
405 tlink = cifs_sb_tlink(cifs_sb);
406 if (IS_ERR(tlink))
407 return PTR_ERR(tlink);
408 pTcon = tlink_tcon(tlink);
409
410 xid = get_xid();
411
412 full_path = build_path_from_dentry(direntry);
413 if (full_path == NULL) {
414 rc = -ENOMEM;
415 goto list_ea_exit;
416 }
417 /* return dos attributes as pseudo xattr */
418 /* return alt name if available as pseudo attr */
419
420 /* if proc/fs/cifs/streamstoxattr is set then
421 search server for EAs or streams to
422 returns as xattrs */
423
424 if (pTcon->ses->server->ops->query_all_EAs)
425 rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
426 full_path, NULL, data, buf_size, cifs_sb);
427list_ea_exit:
428 kfree(full_path);
429 free_xid(xid);
430 cifs_put_tlink(tlink);
431 return rc;
432}
433
434static const struct xattr_handler cifs_user_xattr_handler = {
435 .prefix = XATTR_USER_PREFIX,
436 .flags = XATTR_USER,
437 .get = cifs_xattr_get,
438 .set = cifs_xattr_set,
439};
440
441/* os2.* attributes are treated like user.* attributes */
442static const struct xattr_handler cifs_os2_xattr_handler = {
443 .prefix = XATTR_OS2_PREFIX,
444 .flags = XATTR_USER,
445 .get = cifs_xattr_get,
446 .set = cifs_xattr_set,
447};
448
449static const struct xattr_handler cifs_cifs_acl_xattr_handler = {
450 .name = CIFS_XATTR_CIFS_ACL,
451 .flags = XATTR_CIFS_ACL,
452 .get = cifs_xattr_get,
453 .set = cifs_xattr_set,
454};
455
456/*
457 * Although this is just an alias for the above, need to move away from
458 * confusing users and using the 20 year old term 'cifs' when it is no
459 * longer secure and was replaced by SMB2/SMB3 a long time ago, and
460 * SMB3 and later are highly secure.
461 */
462static const struct xattr_handler smb3_acl_xattr_handler = {
463 .name = SMB3_XATTR_CIFS_ACL,
464 .flags = XATTR_CIFS_ACL,
465 .get = cifs_xattr_get,
466 .set = cifs_xattr_set,
467};
468
469static const struct xattr_handler cifs_cifs_ntsd_xattr_handler = {
470 .name = CIFS_XATTR_CIFS_NTSD,
471 .flags = XATTR_CIFS_NTSD,
472 .get = cifs_xattr_get,
473 .set = cifs_xattr_set,
474};
475
476/*
477 * Although this is just an alias for the above, need to move away from
478 * confusing users and using the 20 year old term 'cifs' when it is no
479 * longer secure and was replaced by SMB2/SMB3 a long time ago, and
480 * SMB3 and later are highly secure.
481 */
482static const struct xattr_handler smb3_ntsd_xattr_handler = {
483 .name = SMB3_XATTR_CIFS_NTSD,
484 .flags = XATTR_CIFS_NTSD,
485 .get = cifs_xattr_get,
486 .set = cifs_xattr_set,
487};
488
489static const struct xattr_handler cifs_posix_acl_access_xattr_handler = {
490 .name = XATTR_NAME_POSIX_ACL_ACCESS,
491 .flags = XATTR_ACL_ACCESS,
492 .get = cifs_xattr_get,
493 .set = cifs_xattr_set,
494};
495
496static const struct xattr_handler cifs_posix_acl_default_xattr_handler = {
497 .name = XATTR_NAME_POSIX_ACL_DEFAULT,
498 .flags = XATTR_ACL_DEFAULT,
499 .get = cifs_xattr_get,
500 .set = cifs_xattr_set,
501};
502
503const struct xattr_handler *cifs_xattr_handlers[] = {
504 &cifs_user_xattr_handler,
505 &cifs_os2_xattr_handler,
506 &cifs_cifs_acl_xattr_handler,
507 &smb3_acl_xattr_handler, /* alias for above since avoiding "cifs" */
508 &cifs_cifs_ntsd_xattr_handler,
509 &smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */
510 &cifs_posix_acl_access_xattr_handler,
511 &cifs_posix_acl_default_xattr_handler,
512 NULL
513};