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Commit | Line | Data |
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1da177e4 LT |
1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
2 | * | |
3 | * Added conditional policy language extensions | |
4 | * | |
5 | * Copyright (C) 2003 - 2004 Tresys Technology, LLC | |
6 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/fs.h> | |
bb003079 | 17 | #include <linux/mutex.h> |
1da177e4 LT |
18 | #include <linux/init.h> |
19 | #include <linux/string.h> | |
20 | #include <linux/security.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/percpu.h> | |
af601e46 | 24 | #include <linux/audit.h> |
1da177e4 LT |
25 | #include <asm/uaccess.h> |
26 | #include <asm/semaphore.h> | |
27 | ||
28 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
29 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
30 | ||
31 | #include "flask.h" | |
32 | #include "avc.h" | |
33 | #include "avc_ss.h" | |
34 | #include "security.h" | |
35 | #include "objsec.h" | |
36 | #include "conditional.h" | |
37 | ||
38 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; | |
39 | ||
4e5ab4cb JM |
40 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
41 | #define SELINUX_COMPAT_NET_VALUE 0 | |
42 | #else | |
43 | #define SELINUX_COMPAT_NET_VALUE 1 | |
44 | #endif | |
45 | ||
46 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; | |
47 | ||
1da177e4 LT |
48 | static int __init checkreqprot_setup(char *str) |
49 | { | |
50 | selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; | |
51 | return 1; | |
52 | } | |
53 | __setup("checkreqprot=", checkreqprot_setup); | |
54 | ||
4e5ab4cb JM |
55 | static int __init selinux_compat_net_setup(char *str) |
56 | { | |
57 | selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; | |
58 | return 1; | |
59 | } | |
60 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
61 | ||
1da177e4 | 62 | |
bb003079 | 63 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
64 | |
65 | /* global data for booleans */ | |
66 | static struct dentry *bool_dir = NULL; | |
67 | static int bool_num = 0; | |
d313f948 | 68 | static char **bool_pending_names; |
1da177e4 LT |
69 | static int *bool_pending_values = NULL; |
70 | ||
e47c8fc5 CP |
71 | /* global data for classes */ |
72 | static struct dentry *class_dir = NULL; | |
73 | static unsigned long last_class_ino; | |
74 | ||
1da177e4 LT |
75 | extern void selnl_notify_setenforce(int val); |
76 | ||
77 | /* Check whether a task is allowed to use a security operation. */ | |
78 | static int task_has_security(struct task_struct *tsk, | |
79 | u32 perms) | |
80 | { | |
81 | struct task_security_struct *tsec; | |
82 | ||
83 | tsec = tsk->security; | |
84 | if (!tsec) | |
85 | return -EACCES; | |
86 | ||
87 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, | |
88 | SECCLASS_SECURITY, perms, NULL); | |
89 | } | |
90 | ||
91 | enum sel_inos { | |
92 | SEL_ROOT_INO = 2, | |
93 | SEL_LOAD, /* load policy */ | |
94 | SEL_ENFORCE, /* get or set enforcing status */ | |
95 | SEL_CONTEXT, /* validate context */ | |
96 | SEL_ACCESS, /* compute access decision */ | |
97 | SEL_CREATE, /* compute create labeling decision */ | |
98 | SEL_RELABEL, /* compute relabeling decision */ | |
99 | SEL_USER, /* compute reachable user contexts */ | |
100 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
101 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
102 | SEL_MLS, /* return if MLS policy is enabled */ | |
103 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
104 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
105 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 106 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
107 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
108 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 109 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
110 | }; |
111 | ||
6174eafc JC |
112 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
113 | ||
f0ee2e46 | 114 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
bce34bc0 | 115 | #define SEL_BOOL_INO_OFFSET 0x02000000 |
e47c8fc5 | 116 | #define SEL_CLASS_INO_OFFSET 0x04000000 |
f0ee2e46 JC |
117 | #define SEL_INO_MASK 0x00ffffff |
118 | ||
1da177e4 LT |
119 | #define TMPBUFLEN 12 |
120 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
121 | size_t count, loff_t *ppos) | |
122 | { | |
123 | char tmpbuf[TMPBUFLEN]; | |
124 | ssize_t length; | |
125 | ||
126 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
127 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
128 | } | |
129 | ||
130 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
131 | static ssize_t sel_write_enforce(struct file * file, const char __user * buf, | |
132 | size_t count, loff_t *ppos) | |
133 | ||
134 | { | |
135 | char *page; | |
136 | ssize_t length; | |
137 | int new_value; | |
138 | ||
bfd51626 | 139 | if (count >= PAGE_SIZE) |
1da177e4 LT |
140 | return -ENOMEM; |
141 | if (*ppos != 0) { | |
142 | /* No partial writes. */ | |
143 | return -EINVAL; | |
144 | } | |
145 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
146 | if (!page) | |
147 | return -ENOMEM; | |
148 | length = -EFAULT; | |
149 | if (copy_from_user(page, buf, count)) | |
150 | goto out; | |
151 | ||
152 | length = -EINVAL; | |
153 | if (sscanf(page, "%d", &new_value) != 1) | |
154 | goto out; | |
155 | ||
156 | if (new_value != selinux_enforcing) { | |
157 | length = task_has_security(current, SECURITY__SETENFORCE); | |
158 | if (length) | |
159 | goto out; | |
af601e46 SG |
160 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
161 | "enforcing=%d old_enforcing=%d auid=%u", new_value, | |
162 | selinux_enforcing, | |
163 | audit_get_loginuid(current->audit_context)); | |
1da177e4 LT |
164 | selinux_enforcing = new_value; |
165 | if (selinux_enforcing) | |
166 | avc_ss_reset(0); | |
167 | selnl_notify_setenforce(selinux_enforcing); | |
168 | } | |
169 | length = count; | |
170 | out: | |
171 | free_page((unsigned long) page); | |
172 | return length; | |
173 | } | |
174 | #else | |
175 | #define sel_write_enforce NULL | |
176 | #endif | |
177 | ||
9c2e08c5 | 178 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
179 | .read = sel_read_enforce, |
180 | .write = sel_write_enforce, | |
181 | }; | |
182 | ||
3f12070e EP |
183 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
184 | size_t count, loff_t *ppos) | |
185 | { | |
186 | char tmpbuf[TMPBUFLEN]; | |
187 | ssize_t length; | |
188 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
189 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
190 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
191 | ||
192 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
193 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
194 | } | |
195 | ||
196 | static const struct file_operations sel_handle_unknown_ops = { | |
197 | .read = sel_read_handle_unknown, | |
198 | }; | |
199 | ||
1da177e4 LT |
200 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
201 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, | |
202 | size_t count, loff_t *ppos) | |
203 | ||
204 | { | |
205 | char *page; | |
206 | ssize_t length; | |
207 | int new_value; | |
208 | extern int selinux_disable(void); | |
209 | ||
bfd51626 | 210 | if (count >= PAGE_SIZE) |
1da177e4 LT |
211 | return -ENOMEM; |
212 | if (*ppos != 0) { | |
213 | /* No partial writes. */ | |
214 | return -EINVAL; | |
215 | } | |
216 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
217 | if (!page) | |
218 | return -ENOMEM; | |
219 | length = -EFAULT; | |
220 | if (copy_from_user(page, buf, count)) | |
221 | goto out; | |
222 | ||
223 | length = -EINVAL; | |
224 | if (sscanf(page, "%d", &new_value) != 1) | |
225 | goto out; | |
226 | ||
227 | if (new_value) { | |
228 | length = selinux_disable(); | |
229 | if (length < 0) | |
230 | goto out; | |
af601e46 SG |
231 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
232 | "selinux=0 auid=%u", | |
233 | audit_get_loginuid(current->audit_context)); | |
1da177e4 LT |
234 | } |
235 | ||
236 | length = count; | |
237 | out: | |
238 | free_page((unsigned long) page); | |
239 | return length; | |
240 | } | |
241 | #else | |
242 | #define sel_write_disable NULL | |
243 | #endif | |
244 | ||
9c2e08c5 | 245 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
246 | .write = sel_write_disable, |
247 | }; | |
248 | ||
249 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
250 | size_t count, loff_t *ppos) | |
251 | { | |
252 | char tmpbuf[TMPBUFLEN]; | |
253 | ssize_t length; | |
254 | ||
255 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
256 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
257 | } | |
258 | ||
9c2e08c5 | 259 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
260 | .read = sel_read_policyvers, |
261 | }; | |
262 | ||
263 | /* declaration for sel_write_load */ | |
264 | static int sel_make_bools(void); | |
e47c8fc5 CP |
265 | static int sel_make_classes(void); |
266 | ||
267 | /* declaration for sel_make_class_dirs */ | |
268 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
269 | unsigned long *ino); | |
1da177e4 LT |
270 | |
271 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
272 | size_t count, loff_t *ppos) | |
273 | { | |
274 | char tmpbuf[TMPBUFLEN]; | |
275 | ssize_t length; | |
276 | ||
277 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
278 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
279 | } | |
280 | ||
9c2e08c5 | 281 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
282 | .read = sel_read_mls, |
283 | }; | |
284 | ||
285 | static ssize_t sel_write_load(struct file * file, const char __user * buf, | |
286 | size_t count, loff_t *ppos) | |
287 | ||
288 | { | |
289 | int ret; | |
290 | ssize_t length; | |
291 | void *data = NULL; | |
292 | ||
bb003079 | 293 | mutex_lock(&sel_mutex); |
1da177e4 LT |
294 | |
295 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
296 | if (length) | |
297 | goto out; | |
298 | ||
299 | if (*ppos != 0) { | |
300 | /* No partial writes. */ | |
301 | length = -EINVAL; | |
302 | goto out; | |
303 | } | |
304 | ||
bfd51626 | 305 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
306 | || (data = vmalloc(count)) == NULL) { |
307 | length = -ENOMEM; | |
308 | goto out; | |
309 | } | |
310 | ||
311 | length = -EFAULT; | |
312 | if (copy_from_user(data, buf, count) != 0) | |
313 | goto out; | |
314 | ||
315 | length = security_load_policy(data, count); | |
316 | if (length) | |
317 | goto out; | |
318 | ||
319 | ret = sel_make_bools(); | |
e47c8fc5 CP |
320 | if (ret) { |
321 | length = ret; | |
322 | goto out1; | |
323 | } | |
324 | ||
325 | ret = sel_make_classes(); | |
1da177e4 LT |
326 | if (ret) |
327 | length = ret; | |
328 | else | |
329 | length = count; | |
e47c8fc5 CP |
330 | |
331 | out1: | |
3f12070e EP |
332 | |
333 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", | |
334 | (security_get_reject_unknown() ? "reject" : | |
335 | (security_get_allow_unknown() ? "allow" : "deny"))); | |
336 | ||
af601e46 SG |
337 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
338 | "policy loaded auid=%u", | |
339 | audit_get_loginuid(current->audit_context)); | |
1da177e4 | 340 | out: |
bb003079 | 341 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
342 | vfree(data); |
343 | return length; | |
344 | } | |
345 | ||
9c2e08c5 | 346 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
347 | .write = sel_write_load, |
348 | }; | |
349 | ||
ce9982d0 | 350 | static ssize_t sel_write_context(struct file * file, char *buf, size_t size) |
1da177e4 | 351 | { |
ce9982d0 SS |
352 | char *canon; |
353 | u32 sid, len; | |
1da177e4 LT |
354 | ssize_t length; |
355 | ||
356 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
357 | if (length) | |
358 | return length; | |
359 | ||
ce9982d0 SS |
360 | length = security_context_to_sid(buf, size, &sid); |
361 | if (length < 0) | |
362 | return length; | |
1da177e4 | 363 | |
ce9982d0 | 364 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 365 | if (length < 0) |
ce9982d0 SS |
366 | return length; |
367 | ||
368 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
369 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
370 | "max\n", __FUNCTION__, len); | |
371 | length = -ERANGE; | |
1da177e4 | 372 | goto out; |
ce9982d0 | 373 | } |
1da177e4 | 374 | |
ce9982d0 SS |
375 | memcpy(buf, canon, len); |
376 | length = len; | |
1da177e4 | 377 | out: |
ce9982d0 | 378 | kfree(canon); |
1da177e4 LT |
379 | return length; |
380 | } | |
381 | ||
1da177e4 LT |
382 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
383 | size_t count, loff_t *ppos) | |
384 | { | |
385 | char tmpbuf[TMPBUFLEN]; | |
386 | ssize_t length; | |
387 | ||
388 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
389 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
390 | } | |
391 | ||
392 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, | |
393 | size_t count, loff_t *ppos) | |
394 | { | |
395 | char *page; | |
396 | ssize_t length; | |
397 | unsigned int new_value; | |
398 | ||
399 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
400 | if (length) | |
401 | return length; | |
402 | ||
bfd51626 | 403 | if (count >= PAGE_SIZE) |
1da177e4 LT |
404 | return -ENOMEM; |
405 | if (*ppos != 0) { | |
406 | /* No partial writes. */ | |
407 | return -EINVAL; | |
408 | } | |
409 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
410 | if (!page) | |
411 | return -ENOMEM; | |
412 | length = -EFAULT; | |
413 | if (copy_from_user(page, buf, count)) | |
414 | goto out; | |
415 | ||
416 | length = -EINVAL; | |
417 | if (sscanf(page, "%u", &new_value) != 1) | |
418 | goto out; | |
419 | ||
420 | selinux_checkreqprot = new_value ? 1 : 0; | |
421 | length = count; | |
422 | out: | |
423 | free_page((unsigned long) page); | |
424 | return length; | |
425 | } | |
9c2e08c5 | 426 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
427 | .read = sel_read_checkreqprot, |
428 | .write = sel_write_checkreqprot, | |
429 | }; | |
430 | ||
4e5ab4cb JM |
431 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
432 | size_t count, loff_t *ppos) | |
433 | { | |
434 | char tmpbuf[TMPBUFLEN]; | |
435 | ssize_t length; | |
436 | ||
437 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
438 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
439 | } | |
440 | ||
441 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, | |
442 | size_t count, loff_t *ppos) | |
443 | { | |
444 | char *page; | |
445 | ssize_t length; | |
446 | int new_value; | |
447 | ||
448 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
449 | if (length) | |
450 | return length; | |
451 | ||
452 | if (count >= PAGE_SIZE) | |
453 | return -ENOMEM; | |
454 | if (*ppos != 0) { | |
455 | /* No partial writes. */ | |
456 | return -EINVAL; | |
457 | } | |
458 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
459 | if (!page) | |
460 | return -ENOMEM; | |
461 | length = -EFAULT; | |
462 | if (copy_from_user(page, buf, count)) | |
463 | goto out; | |
464 | ||
465 | length = -EINVAL; | |
466 | if (sscanf(page, "%d", &new_value) != 1) | |
467 | goto out; | |
468 | ||
469 | selinux_compat_net = new_value ? 1 : 0; | |
470 | length = count; | |
471 | out: | |
472 | free_page((unsigned long) page); | |
473 | return length; | |
474 | } | |
9c2e08c5 | 475 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
476 | .read = sel_read_compat_net, |
477 | .write = sel_write_compat_net, | |
478 | }; | |
479 | ||
1da177e4 LT |
480 | /* |
481 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
482 | */ | |
483 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); | |
484 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); | |
485 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); | |
486 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); | |
487 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); | |
488 | ||
489 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
490 | [SEL_ACCESS] = sel_write_access, | |
491 | [SEL_CREATE] = sel_write_create, | |
492 | [SEL_RELABEL] = sel_write_relabel, | |
493 | [SEL_USER] = sel_write_user, | |
494 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 495 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
496 | }; |
497 | ||
498 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
499 | { | |
3d5ff529 | 500 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
501 | char *data; |
502 | ssize_t rv; | |
503 | ||
6e20a64a | 504 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
505 | return -EINVAL; |
506 | ||
507 | data = simple_transaction_get(file, buf, size); | |
508 | if (IS_ERR(data)) | |
509 | return PTR_ERR(data); | |
510 | ||
511 | rv = write_op[ino](file, data, size); | |
512 | if (rv>0) { | |
513 | simple_transaction_set(file, rv); | |
514 | rv = size; | |
515 | } | |
516 | return rv; | |
517 | } | |
518 | ||
9c2e08c5 | 519 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
520 | .write = selinux_transaction_write, |
521 | .read = simple_transaction_read, | |
522 | .release = simple_transaction_release, | |
523 | }; | |
524 | ||
525 | /* | |
526 | * payload - write methods | |
527 | * If the method has a response, the response should be put in buf, | |
528 | * and the length returned. Otherwise return 0 or and -error. | |
529 | */ | |
530 | ||
531 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) | |
532 | { | |
533 | char *scon, *tcon; | |
534 | u32 ssid, tsid; | |
535 | u16 tclass; | |
536 | u32 req; | |
537 | struct av_decision avd; | |
538 | ssize_t length; | |
539 | ||
540 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
541 | if (length) | |
542 | return length; | |
543 | ||
544 | length = -ENOMEM; | |
89d155ef | 545 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
546 | if (!scon) |
547 | return length; | |
1da177e4 | 548 | |
89d155ef | 549 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
550 | if (!tcon) |
551 | goto out; | |
1da177e4 LT |
552 | |
553 | length = -EINVAL; | |
554 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
555 | goto out2; | |
556 | ||
557 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
558 | if (length < 0) | |
559 | goto out2; | |
560 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
561 | if (length < 0) | |
562 | goto out2; | |
563 | ||
564 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
565 | if (length < 0) | |
566 | goto out2; | |
567 | ||
568 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
569 | "%x %x %x %x %u", | |
570 | avd.allowed, avd.decided, | |
571 | avd.auditallow, avd.auditdeny, | |
572 | avd.seqno); | |
573 | out2: | |
574 | kfree(tcon); | |
575 | out: | |
576 | kfree(scon); | |
577 | return length; | |
578 | } | |
579 | ||
580 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) | |
581 | { | |
582 | char *scon, *tcon; | |
583 | u32 ssid, tsid, newsid; | |
584 | u16 tclass; | |
585 | ssize_t length; | |
586 | char *newcon; | |
587 | u32 len; | |
588 | ||
589 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
590 | if (length) | |
591 | return length; | |
592 | ||
593 | length = -ENOMEM; | |
89d155ef | 594 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
595 | if (!scon) |
596 | return length; | |
1da177e4 | 597 | |
89d155ef | 598 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
599 | if (!tcon) |
600 | goto out; | |
1da177e4 LT |
601 | |
602 | length = -EINVAL; | |
603 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
604 | goto out2; | |
605 | ||
606 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
607 | if (length < 0) | |
608 | goto out2; | |
609 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
610 | if (length < 0) | |
611 | goto out2; | |
612 | ||
613 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
614 | if (length < 0) | |
615 | goto out2; | |
616 | ||
617 | length = security_sid_to_context(newsid, &newcon, &len); | |
618 | if (length < 0) | |
619 | goto out2; | |
620 | ||
621 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
622 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
623 | "max\n", __FUNCTION__, len); | |
624 | length = -ERANGE; | |
625 | goto out3; | |
626 | } | |
627 | ||
628 | memcpy(buf, newcon, len); | |
629 | length = len; | |
630 | out3: | |
631 | kfree(newcon); | |
632 | out2: | |
633 | kfree(tcon); | |
634 | out: | |
635 | kfree(scon); | |
636 | return length; | |
637 | } | |
638 | ||
639 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) | |
640 | { | |
641 | char *scon, *tcon; | |
642 | u32 ssid, tsid, newsid; | |
643 | u16 tclass; | |
644 | ssize_t length; | |
645 | char *newcon; | |
646 | u32 len; | |
647 | ||
648 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
649 | if (length) | |
650 | return length; | |
651 | ||
652 | length = -ENOMEM; | |
89d155ef | 653 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
654 | if (!scon) |
655 | return length; | |
1da177e4 | 656 | |
89d155ef | 657 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
658 | if (!tcon) |
659 | goto out; | |
1da177e4 LT |
660 | |
661 | length = -EINVAL; | |
662 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
663 | goto out2; | |
664 | ||
665 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
666 | if (length < 0) | |
667 | goto out2; | |
668 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
669 | if (length < 0) | |
670 | goto out2; | |
671 | ||
672 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
673 | if (length < 0) | |
674 | goto out2; | |
675 | ||
676 | length = security_sid_to_context(newsid, &newcon, &len); | |
677 | if (length < 0) | |
678 | goto out2; | |
679 | ||
680 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
681 | length = -ERANGE; | |
682 | goto out3; | |
683 | } | |
684 | ||
685 | memcpy(buf, newcon, len); | |
686 | length = len; | |
687 | out3: | |
688 | kfree(newcon); | |
689 | out2: | |
690 | kfree(tcon); | |
691 | out: | |
692 | kfree(scon); | |
693 | return length; | |
694 | } | |
695 | ||
696 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) | |
697 | { | |
698 | char *con, *user, *ptr; | |
699 | u32 sid, *sids; | |
700 | ssize_t length; | |
701 | char *newcon; | |
702 | int i, rc; | |
703 | u32 len, nsids; | |
704 | ||
705 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
706 | if (length) | |
707 | return length; | |
708 | ||
709 | length = -ENOMEM; | |
89d155ef | 710 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
711 | if (!con) |
712 | return length; | |
1da177e4 | 713 | |
89d155ef | 714 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
715 | if (!user) |
716 | goto out; | |
1da177e4 LT |
717 | |
718 | length = -EINVAL; | |
719 | if (sscanf(buf, "%s %s", con, user) != 2) | |
720 | goto out2; | |
721 | ||
722 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
723 | if (length < 0) | |
724 | goto out2; | |
725 | ||
726 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
727 | if (length < 0) | |
728 | goto out2; | |
729 | ||
730 | length = sprintf(buf, "%u", nsids) + 1; | |
731 | ptr = buf + length; | |
732 | for (i = 0; i < nsids; i++) { | |
733 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
734 | if (rc) { | |
735 | length = rc; | |
736 | goto out3; | |
737 | } | |
738 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
739 | kfree(newcon); | |
740 | length = -ERANGE; | |
741 | goto out3; | |
742 | } | |
743 | memcpy(ptr, newcon, len); | |
744 | kfree(newcon); | |
745 | ptr += len; | |
746 | length += len; | |
747 | } | |
748 | out3: | |
749 | kfree(sids); | |
750 | out2: | |
751 | kfree(user); | |
752 | out: | |
753 | kfree(con); | |
754 | return length; | |
755 | } | |
756 | ||
757 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) | |
758 | { | |
759 | char *scon, *tcon; | |
760 | u32 ssid, tsid, newsid; | |
761 | u16 tclass; | |
762 | ssize_t length; | |
763 | char *newcon; | |
764 | u32 len; | |
765 | ||
766 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
767 | if (length) | |
768 | return length; | |
769 | ||
770 | length = -ENOMEM; | |
89d155ef | 771 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
772 | if (!scon) |
773 | return length; | |
1da177e4 | 774 | |
89d155ef | 775 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
776 | if (!tcon) |
777 | goto out; | |
1da177e4 LT |
778 | |
779 | length = -EINVAL; | |
780 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
781 | goto out2; | |
782 | ||
783 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
784 | if (length < 0) | |
785 | goto out2; | |
786 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
787 | if (length < 0) | |
788 | goto out2; | |
789 | ||
790 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
791 | if (length < 0) | |
792 | goto out2; | |
793 | ||
794 | length = security_sid_to_context(newsid, &newcon, &len); | |
795 | if (length < 0) | |
796 | goto out2; | |
797 | ||
798 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
799 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
800 | "max\n", __FUNCTION__, len); | |
801 | length = -ERANGE; | |
802 | goto out3; | |
803 | } | |
804 | ||
805 | memcpy(buf, newcon, len); | |
806 | length = len; | |
807 | out3: | |
808 | kfree(newcon); | |
809 | out2: | |
810 | kfree(tcon); | |
811 | out: | |
812 | kfree(scon); | |
813 | return length; | |
814 | } | |
815 | ||
816 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
817 | { | |
818 | struct inode *ret = new_inode(sb); | |
819 | ||
820 | if (ret) { | |
821 | ret->i_mode = mode; | |
822 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
823 | ret->i_blocks = 0; |
824 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
825 | } | |
826 | return ret; | |
827 | } | |
828 | ||
1da177e4 LT |
829 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
830 | size_t count, loff_t *ppos) | |
831 | { | |
832 | char *page = NULL; | |
833 | ssize_t length; | |
1da177e4 LT |
834 | ssize_t ret; |
835 | int cur_enforcing; | |
d313f948 SS |
836 | struct inode *inode = filep->f_path.dentry->d_inode; |
837 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
838 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 839 | |
bb003079 | 840 | mutex_lock(&sel_mutex); |
1da177e4 | 841 | |
d313f948 SS |
842 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
843 | ret = -EINVAL; | |
844 | goto out; | |
845 | } | |
1da177e4 | 846 | |
bfd51626 | 847 | if (count > PAGE_SIZE) { |
1da177e4 LT |
848 | ret = -EINVAL; |
849 | goto out; | |
850 | } | |
851 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { | |
852 | ret = -ENOMEM; | |
853 | goto out; | |
854 | } | |
855 | ||
d313f948 | 856 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
857 | if (cur_enforcing < 0) { |
858 | ret = cur_enforcing; | |
859 | goto out; | |
860 | } | |
1da177e4 | 861 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 862 | bool_pending_values[index]); |
68bdcf28 | 863 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 864 | out: |
bb003079 | 865 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
866 | if (page) |
867 | free_page((unsigned long)page); | |
868 | return ret; | |
869 | } | |
870 | ||
871 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
872 | size_t count, loff_t *ppos) | |
873 | { | |
874 | char *page = NULL; | |
d313f948 | 875 | ssize_t length; |
1da177e4 | 876 | int new_value; |
d313f948 SS |
877 | struct inode *inode = filep->f_path.dentry->d_inode; |
878 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
879 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 880 | |
bb003079 | 881 | mutex_lock(&sel_mutex); |
1da177e4 LT |
882 | |
883 | length = task_has_security(current, SECURITY__SETBOOL); | |
884 | if (length) | |
885 | goto out; | |
886 | ||
d313f948 SS |
887 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
888 | length = -EINVAL; | |
889 | goto out; | |
890 | } | |
891 | ||
bfd51626 | 892 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
893 | length = -ENOMEM; |
894 | goto out; | |
895 | } | |
d313f948 | 896 | |
1da177e4 LT |
897 | if (*ppos != 0) { |
898 | /* No partial writes. */ | |
d313f948 | 899 | length = -EINVAL; |
1da177e4 LT |
900 | goto out; |
901 | } | |
902 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
903 | if (!page) { | |
904 | length = -ENOMEM; | |
905 | goto out; | |
906 | } | |
907 | ||
d313f948 | 908 | length = -EFAULT; |
1da177e4 LT |
909 | if (copy_from_user(page, buf, count)) |
910 | goto out; | |
911 | ||
912 | length = -EINVAL; | |
913 | if (sscanf(page, "%d", &new_value) != 1) | |
914 | goto out; | |
915 | ||
916 | if (new_value) | |
917 | new_value = 1; | |
918 | ||
d313f948 | 919 | bool_pending_values[index] = new_value; |
1da177e4 LT |
920 | length = count; |
921 | ||
922 | out: | |
bb003079 | 923 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
924 | if (page) |
925 | free_page((unsigned long) page); | |
926 | return length; | |
927 | } | |
928 | ||
9c2e08c5 | 929 | static const struct file_operations sel_bool_ops = { |
1da177e4 LT |
930 | .read = sel_read_bool, |
931 | .write = sel_write_bool, | |
932 | }; | |
933 | ||
934 | static ssize_t sel_commit_bools_write(struct file *filep, | |
935 | const char __user *buf, | |
936 | size_t count, loff_t *ppos) | |
937 | { | |
938 | char *page = NULL; | |
d313f948 | 939 | ssize_t length; |
1da177e4 LT |
940 | int new_value; |
941 | ||
bb003079 | 942 | mutex_lock(&sel_mutex); |
1da177e4 LT |
943 | |
944 | length = task_has_security(current, SECURITY__SETBOOL); | |
945 | if (length) | |
946 | goto out; | |
947 | ||
bfd51626 | 948 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
949 | length = -ENOMEM; |
950 | goto out; | |
951 | } | |
952 | if (*ppos != 0) { | |
953 | /* No partial writes. */ | |
954 | goto out; | |
955 | } | |
956 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
957 | if (!page) { | |
958 | length = -ENOMEM; | |
959 | goto out; | |
960 | } | |
961 | ||
d313f948 | 962 | length = -EFAULT; |
1da177e4 LT |
963 | if (copy_from_user(page, buf, count)) |
964 | goto out; | |
965 | ||
966 | length = -EINVAL; | |
967 | if (sscanf(page, "%d", &new_value) != 1) | |
968 | goto out; | |
969 | ||
20c19e41 | 970 | if (new_value && bool_pending_values) { |
1da177e4 LT |
971 | security_set_bools(bool_num, bool_pending_values); |
972 | } | |
973 | ||
974 | length = count; | |
975 | ||
976 | out: | |
bb003079 | 977 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
978 | if (page) |
979 | free_page((unsigned long) page); | |
980 | return length; | |
981 | } | |
982 | ||
9c2e08c5 | 983 | static const struct file_operations sel_commit_bools_ops = { |
1da177e4 LT |
984 | .write = sel_commit_bools_write, |
985 | }; | |
986 | ||
0c92d7c7 | 987 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 988 | { |
0955dc03 | 989 | struct list_head *node; |
1da177e4 LT |
990 | |
991 | spin_lock(&dcache_lock); | |
992 | node = de->d_subdirs.next; | |
993 | while (node != &de->d_subdirs) { | |
5160ee6f | 994 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
995 | list_del_init(node); |
996 | ||
997 | if (d->d_inode) { | |
998 | d = dget_locked(d); | |
999 | spin_unlock(&dcache_lock); | |
1000 | d_delete(d); | |
1001 | simple_unlink(de->d_inode, d); | |
1002 | dput(d); | |
1003 | spin_lock(&dcache_lock); | |
1004 | } | |
1005 | node = de->d_subdirs.next; | |
1006 | } | |
1007 | ||
1008 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1009 | } |
1010 | ||
1011 | #define BOOL_DIR_NAME "booleans" | |
1012 | ||
1013 | static int sel_make_bools(void) | |
1014 | { | |
1015 | int i, ret = 0; | |
1016 | ssize_t len; | |
1017 | struct dentry *dentry = NULL; | |
1018 | struct dentry *dir = bool_dir; | |
1019 | struct inode *inode = NULL; | |
1020 | struct inode_security_struct *isec; | |
1021 | char **names = NULL, *page; | |
1022 | int num; | |
1023 | int *values = NULL; | |
1024 | u32 sid; | |
1025 | ||
1026 | /* remove any existing files */ | |
d313f948 | 1027 | kfree(bool_pending_names); |
9a5f04bf | 1028 | kfree(bool_pending_values); |
d313f948 | 1029 | bool_pending_names = NULL; |
20c19e41 | 1030 | bool_pending_values = NULL; |
1da177e4 | 1031 | |
0c92d7c7 | 1032 | sel_remove_entries(dir); |
1da177e4 LT |
1033 | |
1034 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) | |
1035 | return -ENOMEM; | |
1036 | ||
1037 | ret = security_get_bools(&num, &names, &values); | |
1038 | if (ret != 0) | |
1039 | goto out; | |
1040 | ||
1041 | for (i = 0; i < num; i++) { | |
1042 | dentry = d_alloc_name(dir, names[i]); | |
1043 | if (!dentry) { | |
1044 | ret = -ENOMEM; | |
1045 | goto err; | |
1046 | } | |
1047 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1048 | if (!inode) { | |
1049 | ret = -ENOMEM; | |
1050 | goto err; | |
1051 | } | |
1052 | ||
1053 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1054 | if (len < 0) { | |
1055 | ret = -EINVAL; | |
1056 | goto err; | |
1057 | } else if (len >= PAGE_SIZE) { | |
1058 | ret = -ENAMETOOLONG; | |
1059 | goto err; | |
1060 | } | |
1061 | isec = (struct inode_security_struct*)inode->i_security; | |
1062 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) | |
1063 | goto err; | |
1064 | isec->sid = sid; | |
1065 | isec->initialized = 1; | |
1066 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1067 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1068 | d_add(dentry, inode); |
1069 | } | |
1070 | bool_num = num; | |
d313f948 | 1071 | bool_pending_names = names; |
1da177e4 LT |
1072 | bool_pending_values = values; |
1073 | out: | |
1074 | free_page((unsigned long)page); | |
d313f948 SS |
1075 | return ret; |
1076 | err: | |
1da177e4 | 1077 | if (names) { |
9a5f04bf JJ |
1078 | for (i = 0; i < num; i++) |
1079 | kfree(names[i]); | |
1da177e4 LT |
1080 | kfree(names); |
1081 | } | |
20c19e41 | 1082 | kfree(values); |
0c92d7c7 | 1083 | sel_remove_entries(dir); |
1da177e4 LT |
1084 | ret = -ENOMEM; |
1085 | goto out; | |
1086 | } | |
1087 | ||
1088 | #define NULL_FILE_NAME "null" | |
1089 | ||
1090 | struct dentry *selinux_null = NULL; | |
1091 | ||
1092 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1093 | size_t count, loff_t *ppos) | |
1094 | { | |
1095 | char tmpbuf[TMPBUFLEN]; | |
1096 | ssize_t length; | |
1097 | ||
1098 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1099 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1100 | } | |
1101 | ||
1102 | static ssize_t sel_write_avc_cache_threshold(struct file * file, | |
1103 | const char __user * buf, | |
1104 | size_t count, loff_t *ppos) | |
1105 | ||
1106 | { | |
1107 | char *page; | |
1108 | ssize_t ret; | |
1109 | int new_value; | |
1110 | ||
bfd51626 | 1111 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1112 | ret = -ENOMEM; |
1113 | goto out; | |
1114 | } | |
1115 | ||
1116 | if (*ppos != 0) { | |
1117 | /* No partial writes. */ | |
1118 | ret = -EINVAL; | |
1119 | goto out; | |
1120 | } | |
1121 | ||
1122 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
1123 | if (!page) { | |
1124 | ret = -ENOMEM; | |
1125 | goto out; | |
1126 | } | |
1127 | ||
1128 | if (copy_from_user(page, buf, count)) { | |
1129 | ret = -EFAULT; | |
1130 | goto out_free; | |
1131 | } | |
1132 | ||
1133 | if (sscanf(page, "%u", &new_value) != 1) { | |
1134 | ret = -EINVAL; | |
1135 | goto out; | |
1136 | } | |
1137 | ||
1138 | if (new_value != avc_cache_threshold) { | |
1139 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1140 | if (ret) | |
1141 | goto out_free; | |
1142 | avc_cache_threshold = new_value; | |
1143 | } | |
1144 | ret = count; | |
1145 | out_free: | |
1146 | free_page((unsigned long)page); | |
1147 | out: | |
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1152 | size_t count, loff_t *ppos) | |
1153 | { | |
1154 | char *page; | |
1155 | ssize_t ret = 0; | |
1156 | ||
1157 | page = (char *)__get_free_page(GFP_KERNEL); | |
1158 | if (!page) { | |
1159 | ret = -ENOMEM; | |
1160 | goto out; | |
1161 | } | |
1162 | ret = avc_get_hash_stats(page); | |
1163 | if (ret >= 0) | |
1164 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1165 | free_page((unsigned long)page); | |
1166 | out: | |
1167 | return ret; | |
1168 | } | |
1169 | ||
9c2e08c5 | 1170 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1171 | .read = sel_read_avc_cache_threshold, |
1172 | .write = sel_write_avc_cache_threshold, | |
1173 | }; | |
1174 | ||
9c2e08c5 | 1175 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1176 | .read = sel_read_avc_hash_stats, |
1177 | }; | |
1178 | ||
1179 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1180 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1181 | { | |
1182 | int cpu; | |
1183 | ||
1184 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1185 | if (!cpu_possible(cpu)) | |
1186 | continue; | |
1187 | *idx = cpu + 1; | |
1188 | return &per_cpu(avc_cache_stats, cpu); | |
1189 | } | |
1190 | return NULL; | |
1191 | } | |
1192 | ||
1193 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1194 | { | |
1195 | loff_t n = *pos - 1; | |
1196 | ||
1197 | if (*pos == 0) | |
1198 | return SEQ_START_TOKEN; | |
1199 | ||
1200 | return sel_avc_get_stat_idx(&n); | |
1201 | } | |
1202 | ||
1203 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1204 | { | |
1205 | return sel_avc_get_stat_idx(pos); | |
1206 | } | |
1207 | ||
1208 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1209 | { | |
1210 | struct avc_cache_stats *st = v; | |
1211 | ||
1212 | if (v == SEQ_START_TOKEN) | |
1213 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1214 | "frees\n"); | |
1215 | else | |
1216 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1217 | st->hits, st->misses, st->allocations, | |
1218 | st->reclaims, st->frees); | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1223 | { } | |
1224 | ||
1225 | static struct seq_operations sel_avc_cache_stats_seq_ops = { | |
1226 | .start = sel_avc_stats_seq_start, | |
1227 | .next = sel_avc_stats_seq_next, | |
1228 | .show = sel_avc_stats_seq_show, | |
1229 | .stop = sel_avc_stats_seq_stop, | |
1230 | }; | |
1231 | ||
1232 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1233 | { | |
1234 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1235 | } | |
1236 | ||
9c2e08c5 | 1237 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1238 | .open = sel_open_avc_cache_stats, |
1239 | .read = seq_read, | |
1240 | .llseek = seq_lseek, | |
1241 | .release = seq_release, | |
1242 | }; | |
1243 | #endif | |
1244 | ||
1245 | static int sel_make_avc_files(struct dentry *dir) | |
1246 | { | |
1247 | int i, ret = 0; | |
1248 | static struct tree_descr files[] = { | |
1249 | { "cache_threshold", | |
1250 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1251 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1252 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1253 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1254 | #endif | |
1255 | }; | |
1256 | ||
6e20a64a | 1257 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1258 | struct inode *inode; |
1259 | struct dentry *dentry; | |
1260 | ||
1261 | dentry = d_alloc_name(dir, files[i].name); | |
1262 | if (!dentry) { | |
1263 | ret = -ENOMEM; | |
d6aafa65 | 1264 | goto out; |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1268 | if (!inode) { | |
1269 | ret = -ENOMEM; | |
d6aafa65 | 1270 | goto out; |
1da177e4 LT |
1271 | } |
1272 | inode->i_fop = files[i].ops; | |
6174eafc | 1273 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1274 | d_add(dentry, inode); |
1275 | } | |
1276 | out: | |
1277 | return ret; | |
1da177e4 LT |
1278 | } |
1279 | ||
f0ee2e46 JC |
1280 | static ssize_t sel_read_initcon(struct file * file, char __user *buf, |
1281 | size_t count, loff_t *ppos) | |
1282 | { | |
1283 | struct inode *inode; | |
1284 | char *con; | |
1285 | u32 sid, len; | |
1286 | ssize_t ret; | |
1287 | ||
1288 | inode = file->f_path.dentry->d_inode; | |
1289 | sid = inode->i_ino&SEL_INO_MASK; | |
1290 | ret = security_sid_to_context(sid, &con, &len); | |
1291 | if (ret < 0) | |
1292 | return ret; | |
1293 | ||
1294 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1295 | kfree(con); | |
1296 | return ret; | |
1297 | } | |
1298 | ||
1299 | static const struct file_operations sel_initcon_ops = { | |
1300 | .read = sel_read_initcon, | |
1301 | }; | |
1302 | ||
1303 | static int sel_make_initcon_files(struct dentry *dir) | |
1304 | { | |
1305 | int i, ret = 0; | |
1306 | ||
1307 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1308 | struct inode *inode; | |
1309 | struct dentry *dentry; | |
1310 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1311 | if (!dentry) { | |
1312 | ret = -ENOMEM; | |
1313 | goto out; | |
1314 | } | |
1315 | ||
1316 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1317 | if (!inode) { | |
1318 | ret = -ENOMEM; | |
1319 | goto out; | |
1320 | } | |
1321 | inode->i_fop = &sel_initcon_ops; | |
1322 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1323 | d_add(dentry, inode); | |
1324 | } | |
1325 | out: | |
1326 | return ret; | |
1327 | } | |
1328 | ||
e47c8fc5 CP |
1329 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1330 | { | |
1331 | return a / b - (a % b < 0); | |
1332 | } | |
1333 | ||
1334 | static inline unsigned long sel_class_to_ino(u16 class) | |
1335 | { | |
1336 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1337 | } | |
1338 | ||
1339 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1340 | { | |
1341 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1342 | } | |
1343 | ||
1344 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1345 | { | |
1346 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1347 | } | |
1348 | ||
1349 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1350 | { | |
1351 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1352 | } | |
1353 | ||
1354 | static ssize_t sel_read_class(struct file * file, char __user *buf, | |
1355 | size_t count, loff_t *ppos) | |
1356 | { | |
1357 | ssize_t rc, len; | |
1358 | char *page; | |
1359 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1360 | ||
1361 | page = (char *)__get_free_page(GFP_KERNEL); | |
1362 | if (!page) { | |
1363 | rc = -ENOMEM; | |
1364 | goto out; | |
1365 | } | |
1366 | ||
1367 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1368 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1369 | free_page((unsigned long)page); | |
1370 | out: | |
1371 | return rc; | |
1372 | } | |
1373 | ||
1374 | static const struct file_operations sel_class_ops = { | |
1375 | .read = sel_read_class, | |
1376 | }; | |
1377 | ||
1378 | static ssize_t sel_read_perm(struct file * file, char __user *buf, | |
1379 | size_t count, loff_t *ppos) | |
1380 | { | |
1381 | ssize_t rc, len; | |
1382 | char *page; | |
1383 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1384 | ||
1385 | page = (char *)__get_free_page(GFP_KERNEL); | |
1386 | if (!page) { | |
1387 | rc = -ENOMEM; | |
1388 | goto out; | |
1389 | } | |
1390 | ||
1391 | len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); | |
1392 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1393 | free_page((unsigned long)page); | |
1394 | out: | |
1395 | return rc; | |
1396 | } | |
1397 | ||
1398 | static const struct file_operations sel_perm_ops = { | |
1399 | .read = sel_read_perm, | |
1400 | }; | |
1401 | ||
1402 | static int sel_make_perm_files(char *objclass, int classvalue, | |
1403 | struct dentry *dir) | |
1404 | { | |
1405 | int i, rc = 0, nperms; | |
1406 | char **perms; | |
1407 | ||
1408 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1409 | if (rc) | |
1410 | goto out; | |
1411 | ||
1412 | for (i = 0; i < nperms; i++) { | |
1413 | struct inode *inode; | |
1414 | struct dentry *dentry; | |
1415 | ||
1416 | dentry = d_alloc_name(dir, perms[i]); | |
1417 | if (!dentry) { | |
1418 | rc = -ENOMEM; | |
1419 | goto out1; | |
1420 | } | |
1421 | ||
1422 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1423 | if (!inode) { | |
1424 | rc = -ENOMEM; | |
1425 | goto out1; | |
1426 | } | |
1427 | inode->i_fop = &sel_perm_ops; | |
1428 | /* i+1 since perm values are 1-indexed */ | |
1429 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1430 | d_add(dentry, inode); | |
1431 | } | |
1432 | ||
1433 | out1: | |
1434 | for (i = 0; i < nperms; i++) | |
1435 | kfree(perms[i]); | |
1436 | kfree(perms); | |
1437 | out: | |
1438 | return rc; | |
1439 | } | |
1440 | ||
1441 | static int sel_make_class_dir_entries(char *classname, int index, | |
1442 | struct dentry *dir) | |
1443 | { | |
1444 | struct dentry *dentry = NULL; | |
1445 | struct inode *inode = NULL; | |
1446 | int rc; | |
1447 | ||
1448 | dentry = d_alloc_name(dir, "index"); | |
1449 | if (!dentry) { | |
1450 | rc = -ENOMEM; | |
1451 | goto out; | |
1452 | } | |
1453 | ||
1454 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1455 | if (!inode) { | |
1456 | rc = -ENOMEM; | |
1457 | goto out; | |
1458 | } | |
1459 | ||
1460 | inode->i_fop = &sel_class_ops; | |
1461 | inode->i_ino = sel_class_to_ino(index); | |
1462 | d_add(dentry, inode); | |
1463 | ||
1464 | dentry = d_alloc_name(dir, "perms"); | |
1465 | if (!dentry) { | |
1466 | rc = -ENOMEM; | |
1467 | goto out; | |
1468 | } | |
1469 | ||
1470 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1471 | if (rc) | |
1472 | goto out; | |
1473 | ||
1474 | rc = sel_make_perm_files(classname, index, dentry); | |
1475 | ||
1476 | out: | |
1477 | return rc; | |
1478 | } | |
1479 | ||
1480 | static void sel_remove_classes(void) | |
1481 | { | |
1482 | struct list_head *class_node; | |
1483 | ||
1484 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1485 | struct dentry *class_subdir = list_entry(class_node, | |
1486 | struct dentry, d_u.d_child); | |
1487 | struct list_head *class_subdir_node; | |
1488 | ||
1489 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1490 | struct dentry *d = list_entry(class_subdir_node, | |
1491 | struct dentry, d_u.d_child); | |
1492 | ||
1493 | if (d->d_inode) | |
1494 | if (d->d_inode->i_mode & S_IFDIR) | |
1495 | sel_remove_entries(d); | |
1496 | } | |
1497 | ||
1498 | sel_remove_entries(class_subdir); | |
1499 | } | |
1500 | ||
1501 | sel_remove_entries(class_dir); | |
1502 | } | |
1503 | ||
1504 | static int sel_make_classes(void) | |
1505 | { | |
1506 | int rc = 0, nclasses, i; | |
1507 | char **classes; | |
1508 | ||
1509 | /* delete any existing entries */ | |
1510 | sel_remove_classes(); | |
1511 | ||
1512 | rc = security_get_classes(&classes, &nclasses); | |
1513 | if (rc < 0) | |
1514 | goto out; | |
1515 | ||
1516 | /* +2 since classes are 1-indexed */ | |
1517 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1518 | ||
1519 | for (i = 0; i < nclasses; i++) { | |
1520 | struct dentry *class_name_dir; | |
1521 | ||
1522 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1523 | if (!class_name_dir) { | |
1524 | rc = -ENOMEM; | |
1525 | goto out1; | |
1526 | } | |
1527 | ||
1528 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1529 | &last_class_ino); | |
1530 | if (rc) | |
1531 | goto out1; | |
1532 | ||
1533 | /* i+1 since class values are 1-indexed */ | |
1534 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1535 | class_name_dir); | |
1536 | if (rc) | |
1537 | goto out1; | |
1538 | } | |
1539 | ||
1540 | out1: | |
1541 | for (i = 0; i < nclasses; i++) | |
1542 | kfree(classes[i]); | |
1543 | kfree(classes); | |
1544 | out: | |
1545 | return rc; | |
1546 | } | |
1547 | ||
0dd4ae51 CP |
1548 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1549 | unsigned long *ino) | |
1da177e4 LT |
1550 | { |
1551 | int ret = 0; | |
1552 | struct inode *inode; | |
1553 | ||
edb20fb5 | 1554 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1555 | if (!inode) { |
1556 | ret = -ENOMEM; | |
1557 | goto out; | |
1558 | } | |
1559 | inode->i_op = &simple_dir_inode_operations; | |
1560 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1561 | inode->i_ino = ++(*ino); |
40e906f8 | 1562 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1563 | inc_nlink(inode); |
1da177e4 | 1564 | d_add(dentry, inode); |
edb20fb5 | 1565 | /* bump link count on parent directory, too */ |
d8c76e6f | 1566 | inc_nlink(dir); |
1da177e4 LT |
1567 | out: |
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | static int sel_fill_super(struct super_block * sb, void * data, int silent) | |
1572 | { | |
1573 | int ret; | |
1574 | struct dentry *dentry; | |
edb20fb5 | 1575 | struct inode *inode, *root_inode; |
1da177e4 LT |
1576 | struct inode_security_struct *isec; |
1577 | ||
1578 | static struct tree_descr selinux_files[] = { | |
1579 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1580 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1581 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1582 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1583 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1584 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1585 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1586 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1587 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1588 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1589 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1590 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1591 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1592 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1593 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1594 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1595 | /* last one */ {""} |
1596 | }; | |
1597 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1598 | if (ret) | |
161ce45a | 1599 | goto err; |
1da177e4 | 1600 | |
edb20fb5 JM |
1601 | root_inode = sb->s_root->d_inode; |
1602 | ||
1da177e4 | 1603 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1604 | if (!dentry) { |
1605 | ret = -ENOMEM; | |
1606 | goto err; | |
1607 | } | |
1da177e4 | 1608 | |
0dd4ae51 | 1609 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1610 | if (ret) |
161ce45a | 1611 | goto err; |
cde174a8 | 1612 | |
1da177e4 | 1613 | bool_dir = dentry; |
1da177e4 LT |
1614 | |
1615 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1616 | if (!dentry) { |
1617 | ret = -ENOMEM; | |
1618 | goto err; | |
1619 | } | |
1da177e4 LT |
1620 | |
1621 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1622 | if (!inode) { |
1623 | ret = -ENOMEM; | |
1624 | goto err; | |
1625 | } | |
6174eafc | 1626 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1627 | isec = (struct inode_security_struct*)inode->i_security; |
1628 | isec->sid = SECINITSID_DEVNULL; | |
1629 | isec->sclass = SECCLASS_CHR_FILE; | |
1630 | isec->initialized = 1; | |
1631 | ||
1632 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1633 | d_add(dentry, inode); | |
1634 | selinux_null = dentry; | |
1635 | ||
1636 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1637 | if (!dentry) { |
1638 | ret = -ENOMEM; | |
1639 | goto err; | |
1640 | } | |
1da177e4 | 1641 | |
0dd4ae51 | 1642 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1643 | if (ret) |
161ce45a | 1644 | goto err; |
1da177e4 LT |
1645 | |
1646 | ret = sel_make_avc_files(dentry); | |
1647 | if (ret) | |
161ce45a | 1648 | goto err; |
f0ee2e46 JC |
1649 | |
1650 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1651 | if (!dentry) { | |
1652 | ret = -ENOMEM; | |
1653 | goto err; | |
1654 | } | |
1655 | ||
0dd4ae51 | 1656 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1657 | if (ret) |
1658 | goto err; | |
1659 | ||
1660 | ret = sel_make_initcon_files(dentry); | |
1661 | if (ret) | |
1662 | goto err; | |
1663 | ||
e47c8fc5 CP |
1664 | dentry = d_alloc_name(sb->s_root, "class"); |
1665 | if (!dentry) { | |
1666 | ret = -ENOMEM; | |
1667 | goto err; | |
1668 | } | |
1669 | ||
1670 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1671 | if (ret) | |
1672 | goto err; | |
1673 | ||
1674 | class_dir = dentry; | |
1675 | ||
1da177e4 | 1676 | out: |
161ce45a JM |
1677 | return ret; |
1678 | err: | |
1da177e4 | 1679 | printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); |
161ce45a | 1680 | goto out; |
1da177e4 LT |
1681 | } |
1682 | ||
454e2398 DH |
1683 | static int sel_get_sb(struct file_system_type *fs_type, |
1684 | int flags, const char *dev_name, void *data, | |
1685 | struct vfsmount *mnt) | |
1da177e4 | 1686 | { |
454e2398 | 1687 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1688 | } |
1689 | ||
1690 | static struct file_system_type sel_fs_type = { | |
1691 | .name = "selinuxfs", | |
1692 | .get_sb = sel_get_sb, | |
1693 | .kill_sb = kill_litter_super, | |
1694 | }; | |
1695 | ||
1696 | struct vfsmount *selinuxfs_mount; | |
1697 | ||
1698 | static int __init init_sel_fs(void) | |
1699 | { | |
1700 | int err; | |
1701 | ||
1702 | if (!selinux_enabled) | |
1703 | return 0; | |
1704 | err = register_filesystem(&sel_fs_type); | |
1705 | if (!err) { | |
1706 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1707 | if (IS_ERR(selinuxfs_mount)) { | |
1708 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1709 | err = PTR_ERR(selinuxfs_mount); | |
1710 | selinuxfs_mount = NULL; | |
1711 | } | |
1712 | } | |
1713 | return err; | |
1714 | } | |
1715 | ||
1716 | __initcall(init_sel_fs); | |
1717 | ||
1718 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1719 | void exit_sel_fs(void) | |
1720 | { | |
1721 | unregister_filesystem(&sel_fs_type); | |
1722 | } | |
1723 | #endif |