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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 | * | |
3bb56b25 PM |
5 | * Updated: Hewlett-Packard <paul.moore@hp.com> |
6 | * | |
7 | * Added support for the policy capability bitmap | |
8 | * | |
9 | * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. | |
1da177e4 LT |
10 | * Copyright (C) 2003 - 2004 Tresys Technology, LLC |
11 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation, version 2. | |
15 | */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/kernel.h> |
18 | #include <linux/pagemap.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include <linux/fs.h> | |
bb003079 | 22 | #include <linux/mutex.h> |
1da177e4 LT |
23 | #include <linux/init.h> |
24 | #include <linux/string.h> | |
25 | #include <linux/security.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/percpu.h> | |
af601e46 | 29 | #include <linux/audit.h> |
1da177e4 LT |
30 | #include <asm/uaccess.h> |
31 | #include <asm/semaphore.h> | |
32 | ||
33 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
34 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
35 | ||
36 | #include "flask.h" | |
37 | #include "avc.h" | |
38 | #include "avc_ss.h" | |
39 | #include "security.h" | |
40 | #include "objsec.h" | |
41 | #include "conditional.h" | |
42 | ||
3bb56b25 PM |
43 | /* Policy capability filenames */ |
44 | static char *policycap_names[] = { | |
45 | "network_peer_controls" | |
46 | }; | |
47 | ||
1da177e4 LT |
48 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; |
49 | ||
4e5ab4cb JM |
50 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
51 | #define SELINUX_COMPAT_NET_VALUE 0 | |
52 | #else | |
53 | #define SELINUX_COMPAT_NET_VALUE 1 | |
54 | #endif | |
55 | ||
56 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; | |
57 | ||
1da177e4 LT |
58 | static int __init checkreqprot_setup(char *str) |
59 | { | |
60 | selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; | |
61 | return 1; | |
62 | } | |
63 | __setup("checkreqprot=", checkreqprot_setup); | |
64 | ||
4e5ab4cb JM |
65 | static int __init selinux_compat_net_setup(char *str) |
66 | { | |
67 | selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; | |
68 | return 1; | |
69 | } | |
70 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
71 | ||
1da177e4 | 72 | |
bb003079 | 73 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
74 | |
75 | /* global data for booleans */ | |
76 | static struct dentry *bool_dir = NULL; | |
77 | static int bool_num = 0; | |
d313f948 | 78 | static char **bool_pending_names; |
1da177e4 LT |
79 | static int *bool_pending_values = NULL; |
80 | ||
e47c8fc5 CP |
81 | /* global data for classes */ |
82 | static struct dentry *class_dir = NULL; | |
83 | static unsigned long last_class_ino; | |
84 | ||
3bb56b25 PM |
85 | /* global data for policy capabilities */ |
86 | static struct dentry *policycap_dir = NULL; | |
87 | ||
1da177e4 LT |
88 | extern void selnl_notify_setenforce(int val); |
89 | ||
90 | /* Check whether a task is allowed to use a security operation. */ | |
91 | static int task_has_security(struct task_struct *tsk, | |
92 | u32 perms) | |
93 | { | |
94 | struct task_security_struct *tsec; | |
95 | ||
96 | tsec = tsk->security; | |
97 | if (!tsec) | |
98 | return -EACCES; | |
99 | ||
100 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, | |
101 | SECCLASS_SECURITY, perms, NULL); | |
102 | } | |
103 | ||
104 | enum sel_inos { | |
105 | SEL_ROOT_INO = 2, | |
106 | SEL_LOAD, /* load policy */ | |
107 | SEL_ENFORCE, /* get or set enforcing status */ | |
108 | SEL_CONTEXT, /* validate context */ | |
109 | SEL_ACCESS, /* compute access decision */ | |
110 | SEL_CREATE, /* compute create labeling decision */ | |
111 | SEL_RELABEL, /* compute relabeling decision */ | |
112 | SEL_USER, /* compute reachable user contexts */ | |
113 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
114 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
115 | SEL_MLS, /* return if MLS policy is enabled */ | |
116 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
117 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
118 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 119 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
120 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
121 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 122 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
123 | }; |
124 | ||
6174eafc JC |
125 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
126 | ||
3bb56b25 PM |
127 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
128 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
129 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
130 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
131 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 132 | |
1da177e4 LT |
133 | #define TMPBUFLEN 12 |
134 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
135 | size_t count, loff_t *ppos) | |
136 | { | |
137 | char tmpbuf[TMPBUFLEN]; | |
138 | ssize_t length; | |
139 | ||
140 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
141 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
142 | } | |
143 | ||
144 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
145 | static ssize_t sel_write_enforce(struct file * file, const char __user * buf, | |
146 | size_t count, loff_t *ppos) | |
147 | ||
148 | { | |
149 | char *page; | |
150 | ssize_t length; | |
151 | int new_value; | |
152 | ||
bfd51626 | 153 | if (count >= PAGE_SIZE) |
1da177e4 LT |
154 | return -ENOMEM; |
155 | if (*ppos != 0) { | |
156 | /* No partial writes. */ | |
157 | return -EINVAL; | |
158 | } | |
159 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
160 | if (!page) | |
161 | return -ENOMEM; | |
162 | length = -EFAULT; | |
163 | if (copy_from_user(page, buf, count)) | |
164 | goto out; | |
165 | ||
166 | length = -EINVAL; | |
167 | if (sscanf(page, "%d", &new_value) != 1) | |
168 | goto out; | |
169 | ||
170 | if (new_value != selinux_enforcing) { | |
171 | length = task_has_security(current, SECURITY__SETENFORCE); | |
172 | if (length) | |
173 | goto out; | |
af601e46 | 174 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
175 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
176 | new_value, selinux_enforcing, | |
177 | audit_get_loginuid(current), | |
178 | audit_get_sessionid(current)); | |
1da177e4 LT |
179 | selinux_enforcing = new_value; |
180 | if (selinux_enforcing) | |
181 | avc_ss_reset(0); | |
182 | selnl_notify_setenforce(selinux_enforcing); | |
183 | } | |
184 | length = count; | |
185 | out: | |
186 | free_page((unsigned long) page); | |
187 | return length; | |
188 | } | |
189 | #else | |
190 | #define sel_write_enforce NULL | |
191 | #endif | |
192 | ||
9c2e08c5 | 193 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
194 | .read = sel_read_enforce, |
195 | .write = sel_write_enforce, | |
196 | }; | |
197 | ||
3f12070e EP |
198 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
199 | size_t count, loff_t *ppos) | |
200 | { | |
201 | char tmpbuf[TMPBUFLEN]; | |
202 | ssize_t length; | |
203 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
204 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
205 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
206 | ||
207 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
208 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
209 | } | |
210 | ||
211 | static const struct file_operations sel_handle_unknown_ops = { | |
212 | .read = sel_read_handle_unknown, | |
213 | }; | |
214 | ||
1da177e4 LT |
215 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
216 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, | |
217 | size_t count, loff_t *ppos) | |
218 | ||
219 | { | |
220 | char *page; | |
221 | ssize_t length; | |
222 | int new_value; | |
223 | extern int selinux_disable(void); | |
224 | ||
bfd51626 | 225 | if (count >= PAGE_SIZE) |
1da177e4 LT |
226 | return -ENOMEM; |
227 | if (*ppos != 0) { | |
228 | /* No partial writes. */ | |
229 | return -EINVAL; | |
230 | } | |
231 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
232 | if (!page) | |
233 | return -ENOMEM; | |
234 | length = -EFAULT; | |
235 | if (copy_from_user(page, buf, count)) | |
236 | goto out; | |
237 | ||
238 | length = -EINVAL; | |
239 | if (sscanf(page, "%d", &new_value) != 1) | |
240 | goto out; | |
241 | ||
242 | if (new_value) { | |
243 | length = selinux_disable(); | |
244 | if (length < 0) | |
245 | goto out; | |
af601e46 | 246 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
247 | "selinux=0 auid=%u ses=%u", |
248 | audit_get_loginuid(current), | |
249 | audit_get_sessionid(current)); | |
1da177e4 LT |
250 | } |
251 | ||
252 | length = count; | |
253 | out: | |
254 | free_page((unsigned long) page); | |
255 | return length; | |
256 | } | |
257 | #else | |
258 | #define sel_write_disable NULL | |
259 | #endif | |
260 | ||
9c2e08c5 | 261 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
262 | .write = sel_write_disable, |
263 | }; | |
264 | ||
265 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
266 | size_t count, loff_t *ppos) | |
267 | { | |
268 | char tmpbuf[TMPBUFLEN]; | |
269 | ssize_t length; | |
270 | ||
271 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
272 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
273 | } | |
274 | ||
9c2e08c5 | 275 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
276 | .read = sel_read_policyvers, |
277 | }; | |
278 | ||
279 | /* declaration for sel_write_load */ | |
280 | static int sel_make_bools(void); | |
e47c8fc5 | 281 | static int sel_make_classes(void); |
3bb56b25 | 282 | static int sel_make_policycap(void); |
e47c8fc5 CP |
283 | |
284 | /* declaration for sel_make_class_dirs */ | |
285 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
286 | unsigned long *ino); | |
1da177e4 LT |
287 | |
288 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
289 | size_t count, loff_t *ppos) | |
290 | { | |
291 | char tmpbuf[TMPBUFLEN]; | |
292 | ssize_t length; | |
293 | ||
294 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
295 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
296 | } | |
297 | ||
9c2e08c5 | 298 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
299 | .read = sel_read_mls, |
300 | }; | |
301 | ||
302 | static ssize_t sel_write_load(struct file * file, const char __user * buf, | |
303 | size_t count, loff_t *ppos) | |
304 | ||
305 | { | |
306 | int ret; | |
307 | ssize_t length; | |
308 | void *data = NULL; | |
309 | ||
bb003079 | 310 | mutex_lock(&sel_mutex); |
1da177e4 LT |
311 | |
312 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
313 | if (length) | |
314 | goto out; | |
315 | ||
316 | if (*ppos != 0) { | |
317 | /* No partial writes. */ | |
318 | length = -EINVAL; | |
319 | goto out; | |
320 | } | |
321 | ||
bfd51626 | 322 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
323 | || (data = vmalloc(count)) == NULL) { |
324 | length = -ENOMEM; | |
325 | goto out; | |
326 | } | |
327 | ||
328 | length = -EFAULT; | |
329 | if (copy_from_user(data, buf, count) != 0) | |
330 | goto out; | |
331 | ||
332 | length = security_load_policy(data, count); | |
333 | if (length) | |
334 | goto out; | |
335 | ||
336 | ret = sel_make_bools(); | |
e47c8fc5 CP |
337 | if (ret) { |
338 | length = ret; | |
339 | goto out1; | |
340 | } | |
341 | ||
342 | ret = sel_make_classes(); | |
3bb56b25 PM |
343 | if (ret) { |
344 | length = ret; | |
345 | goto out1; | |
346 | } | |
347 | ||
348 | ret = sel_make_policycap(); | |
1da177e4 LT |
349 | if (ret) |
350 | length = ret; | |
351 | else | |
352 | length = count; | |
e47c8fc5 CP |
353 | |
354 | out1: | |
3f12070e EP |
355 | |
356 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", | |
357 | (security_get_reject_unknown() ? "reject" : | |
358 | (security_get_allow_unknown() ? "allow" : "deny"))); | |
359 | ||
af601e46 | 360 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
361 | "policy loaded auid=%u ses=%u", |
362 | audit_get_loginuid(current), | |
363 | audit_get_sessionid(current)); | |
1da177e4 | 364 | out: |
bb003079 | 365 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
366 | vfree(data); |
367 | return length; | |
368 | } | |
369 | ||
9c2e08c5 | 370 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
371 | .write = sel_write_load, |
372 | }; | |
373 | ||
ce9982d0 | 374 | static ssize_t sel_write_context(struct file * file, char *buf, size_t size) |
1da177e4 | 375 | { |
ce9982d0 SS |
376 | char *canon; |
377 | u32 sid, len; | |
1da177e4 LT |
378 | ssize_t length; |
379 | ||
380 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
381 | if (length) | |
382 | return length; | |
383 | ||
ce9982d0 SS |
384 | length = security_context_to_sid(buf, size, &sid); |
385 | if (length < 0) | |
386 | return length; | |
1da177e4 | 387 | |
ce9982d0 | 388 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 389 | if (length < 0) |
ce9982d0 SS |
390 | return length; |
391 | ||
392 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
393 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
394 | "max\n", __FUNCTION__, len); | |
395 | length = -ERANGE; | |
1da177e4 | 396 | goto out; |
ce9982d0 | 397 | } |
1da177e4 | 398 | |
ce9982d0 SS |
399 | memcpy(buf, canon, len); |
400 | length = len; | |
1da177e4 | 401 | out: |
ce9982d0 | 402 | kfree(canon); |
1da177e4 LT |
403 | return length; |
404 | } | |
405 | ||
1da177e4 LT |
406 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
407 | size_t count, loff_t *ppos) | |
408 | { | |
409 | char tmpbuf[TMPBUFLEN]; | |
410 | ssize_t length; | |
411 | ||
412 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
413 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
414 | } | |
415 | ||
416 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, | |
417 | size_t count, loff_t *ppos) | |
418 | { | |
419 | char *page; | |
420 | ssize_t length; | |
421 | unsigned int new_value; | |
422 | ||
423 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
424 | if (length) | |
425 | return length; | |
426 | ||
bfd51626 | 427 | if (count >= PAGE_SIZE) |
1da177e4 LT |
428 | return -ENOMEM; |
429 | if (*ppos != 0) { | |
430 | /* No partial writes. */ | |
431 | return -EINVAL; | |
432 | } | |
433 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
434 | if (!page) | |
435 | return -ENOMEM; | |
436 | length = -EFAULT; | |
437 | if (copy_from_user(page, buf, count)) | |
438 | goto out; | |
439 | ||
440 | length = -EINVAL; | |
441 | if (sscanf(page, "%u", &new_value) != 1) | |
442 | goto out; | |
443 | ||
444 | selinux_checkreqprot = new_value ? 1 : 0; | |
445 | length = count; | |
446 | out: | |
447 | free_page((unsigned long) page); | |
448 | return length; | |
449 | } | |
9c2e08c5 | 450 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
451 | .read = sel_read_checkreqprot, |
452 | .write = sel_write_checkreqprot, | |
453 | }; | |
454 | ||
4e5ab4cb JM |
455 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
456 | size_t count, loff_t *ppos) | |
457 | { | |
458 | char tmpbuf[TMPBUFLEN]; | |
459 | ssize_t length; | |
460 | ||
461 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
462 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
463 | } | |
464 | ||
465 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, | |
466 | size_t count, loff_t *ppos) | |
467 | { | |
468 | char *page; | |
469 | ssize_t length; | |
470 | int new_value; | |
471 | ||
472 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
473 | if (length) | |
474 | return length; | |
475 | ||
476 | if (count >= PAGE_SIZE) | |
477 | return -ENOMEM; | |
478 | if (*ppos != 0) { | |
479 | /* No partial writes. */ | |
480 | return -EINVAL; | |
481 | } | |
482 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
483 | if (!page) | |
484 | return -ENOMEM; | |
485 | length = -EFAULT; | |
486 | if (copy_from_user(page, buf, count)) | |
487 | goto out; | |
488 | ||
489 | length = -EINVAL; | |
490 | if (sscanf(page, "%d", &new_value) != 1) | |
491 | goto out; | |
492 | ||
493 | selinux_compat_net = new_value ? 1 : 0; | |
494 | length = count; | |
495 | out: | |
496 | free_page((unsigned long) page); | |
497 | return length; | |
498 | } | |
9c2e08c5 | 499 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
500 | .read = sel_read_compat_net, |
501 | .write = sel_write_compat_net, | |
502 | }; | |
503 | ||
1da177e4 LT |
504 | /* |
505 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
506 | */ | |
507 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); | |
508 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); | |
509 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); | |
510 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); | |
511 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); | |
512 | ||
513 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
514 | [SEL_ACCESS] = sel_write_access, | |
515 | [SEL_CREATE] = sel_write_create, | |
516 | [SEL_RELABEL] = sel_write_relabel, | |
517 | [SEL_USER] = sel_write_user, | |
518 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 519 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
520 | }; |
521 | ||
522 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
523 | { | |
3d5ff529 | 524 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
525 | char *data; |
526 | ssize_t rv; | |
527 | ||
6e20a64a | 528 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
529 | return -EINVAL; |
530 | ||
531 | data = simple_transaction_get(file, buf, size); | |
532 | if (IS_ERR(data)) | |
533 | return PTR_ERR(data); | |
534 | ||
535 | rv = write_op[ino](file, data, size); | |
536 | if (rv>0) { | |
537 | simple_transaction_set(file, rv); | |
538 | rv = size; | |
539 | } | |
540 | return rv; | |
541 | } | |
542 | ||
9c2e08c5 | 543 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
544 | .write = selinux_transaction_write, |
545 | .read = simple_transaction_read, | |
546 | .release = simple_transaction_release, | |
547 | }; | |
548 | ||
549 | /* | |
550 | * payload - write methods | |
551 | * If the method has a response, the response should be put in buf, | |
552 | * and the length returned. Otherwise return 0 or and -error. | |
553 | */ | |
554 | ||
555 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) | |
556 | { | |
557 | char *scon, *tcon; | |
558 | u32 ssid, tsid; | |
559 | u16 tclass; | |
560 | u32 req; | |
561 | struct av_decision avd; | |
562 | ssize_t length; | |
563 | ||
564 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
565 | if (length) | |
566 | return length; | |
567 | ||
568 | length = -ENOMEM; | |
89d155ef | 569 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
570 | if (!scon) |
571 | return length; | |
1da177e4 | 572 | |
89d155ef | 573 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
574 | if (!tcon) |
575 | goto out; | |
1da177e4 LT |
576 | |
577 | length = -EINVAL; | |
578 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
579 | goto out2; | |
580 | ||
581 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
582 | if (length < 0) | |
583 | goto out2; | |
584 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
585 | if (length < 0) | |
586 | goto out2; | |
587 | ||
588 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
589 | if (length < 0) | |
590 | goto out2; | |
591 | ||
592 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
593 | "%x %x %x %x %u", | |
594 | avd.allowed, avd.decided, | |
595 | avd.auditallow, avd.auditdeny, | |
596 | avd.seqno); | |
597 | out2: | |
598 | kfree(tcon); | |
599 | out: | |
600 | kfree(scon); | |
601 | return length; | |
602 | } | |
603 | ||
604 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) | |
605 | { | |
606 | char *scon, *tcon; | |
607 | u32 ssid, tsid, newsid; | |
608 | u16 tclass; | |
609 | ssize_t length; | |
610 | char *newcon; | |
611 | u32 len; | |
612 | ||
613 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
614 | if (length) | |
615 | return length; | |
616 | ||
617 | length = -ENOMEM; | |
89d155ef | 618 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
619 | if (!scon) |
620 | return length; | |
1da177e4 | 621 | |
89d155ef | 622 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
623 | if (!tcon) |
624 | goto out; | |
1da177e4 LT |
625 | |
626 | length = -EINVAL; | |
627 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
628 | goto out2; | |
629 | ||
630 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
631 | if (length < 0) | |
632 | goto out2; | |
633 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
634 | if (length < 0) | |
635 | goto out2; | |
636 | ||
637 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
638 | if (length < 0) | |
639 | goto out2; | |
640 | ||
641 | length = security_sid_to_context(newsid, &newcon, &len); | |
642 | if (length < 0) | |
643 | goto out2; | |
644 | ||
645 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
646 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
647 | "max\n", __FUNCTION__, len); | |
648 | length = -ERANGE; | |
649 | goto out3; | |
650 | } | |
651 | ||
652 | memcpy(buf, newcon, len); | |
653 | length = len; | |
654 | out3: | |
655 | kfree(newcon); | |
656 | out2: | |
657 | kfree(tcon); | |
658 | out: | |
659 | kfree(scon); | |
660 | return length; | |
661 | } | |
662 | ||
663 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) | |
664 | { | |
665 | char *scon, *tcon; | |
666 | u32 ssid, tsid, newsid; | |
667 | u16 tclass; | |
668 | ssize_t length; | |
669 | char *newcon; | |
670 | u32 len; | |
671 | ||
672 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
673 | if (length) | |
674 | return length; | |
675 | ||
676 | length = -ENOMEM; | |
89d155ef | 677 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
678 | if (!scon) |
679 | return length; | |
1da177e4 | 680 | |
89d155ef | 681 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
682 | if (!tcon) |
683 | goto out; | |
1da177e4 LT |
684 | |
685 | length = -EINVAL; | |
686 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
687 | goto out2; | |
688 | ||
689 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
690 | if (length < 0) | |
691 | goto out2; | |
692 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
693 | if (length < 0) | |
694 | goto out2; | |
695 | ||
696 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
697 | if (length < 0) | |
698 | goto out2; | |
699 | ||
700 | length = security_sid_to_context(newsid, &newcon, &len); | |
701 | if (length < 0) | |
702 | goto out2; | |
703 | ||
704 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
705 | length = -ERANGE; | |
706 | goto out3; | |
707 | } | |
708 | ||
709 | memcpy(buf, newcon, len); | |
710 | length = len; | |
711 | out3: | |
712 | kfree(newcon); | |
713 | out2: | |
714 | kfree(tcon); | |
715 | out: | |
716 | kfree(scon); | |
717 | return length; | |
718 | } | |
719 | ||
720 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) | |
721 | { | |
722 | char *con, *user, *ptr; | |
723 | u32 sid, *sids; | |
724 | ssize_t length; | |
725 | char *newcon; | |
726 | int i, rc; | |
727 | u32 len, nsids; | |
728 | ||
729 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
730 | if (length) | |
731 | return length; | |
732 | ||
733 | length = -ENOMEM; | |
89d155ef | 734 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
735 | if (!con) |
736 | return length; | |
1da177e4 | 737 | |
89d155ef | 738 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
739 | if (!user) |
740 | goto out; | |
1da177e4 LT |
741 | |
742 | length = -EINVAL; | |
743 | if (sscanf(buf, "%s %s", con, user) != 2) | |
744 | goto out2; | |
745 | ||
746 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
747 | if (length < 0) | |
748 | goto out2; | |
749 | ||
750 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
751 | if (length < 0) | |
752 | goto out2; | |
753 | ||
754 | length = sprintf(buf, "%u", nsids) + 1; | |
755 | ptr = buf + length; | |
756 | for (i = 0; i < nsids; i++) { | |
757 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
758 | if (rc) { | |
759 | length = rc; | |
760 | goto out3; | |
761 | } | |
762 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
763 | kfree(newcon); | |
764 | length = -ERANGE; | |
765 | goto out3; | |
766 | } | |
767 | memcpy(ptr, newcon, len); | |
768 | kfree(newcon); | |
769 | ptr += len; | |
770 | length += len; | |
771 | } | |
772 | out3: | |
773 | kfree(sids); | |
774 | out2: | |
775 | kfree(user); | |
776 | out: | |
777 | kfree(con); | |
778 | return length; | |
779 | } | |
780 | ||
781 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) | |
782 | { | |
783 | char *scon, *tcon; | |
784 | u32 ssid, tsid, newsid; | |
785 | u16 tclass; | |
786 | ssize_t length; | |
787 | char *newcon; | |
788 | u32 len; | |
789 | ||
790 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
791 | if (length) | |
792 | return length; | |
793 | ||
794 | length = -ENOMEM; | |
89d155ef | 795 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
796 | if (!scon) |
797 | return length; | |
1da177e4 | 798 | |
89d155ef | 799 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
800 | if (!tcon) |
801 | goto out; | |
1da177e4 LT |
802 | |
803 | length = -EINVAL; | |
804 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
805 | goto out2; | |
806 | ||
807 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
808 | if (length < 0) | |
809 | goto out2; | |
810 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
811 | if (length < 0) | |
812 | goto out2; | |
813 | ||
814 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
815 | if (length < 0) | |
816 | goto out2; | |
817 | ||
818 | length = security_sid_to_context(newsid, &newcon, &len); | |
819 | if (length < 0) | |
820 | goto out2; | |
821 | ||
822 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
823 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
824 | "max\n", __FUNCTION__, len); | |
825 | length = -ERANGE; | |
826 | goto out3; | |
827 | } | |
828 | ||
829 | memcpy(buf, newcon, len); | |
830 | length = len; | |
831 | out3: | |
832 | kfree(newcon); | |
833 | out2: | |
834 | kfree(tcon); | |
835 | out: | |
836 | kfree(scon); | |
837 | return length; | |
838 | } | |
839 | ||
840 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
841 | { | |
842 | struct inode *ret = new_inode(sb); | |
843 | ||
844 | if (ret) { | |
845 | ret->i_mode = mode; | |
846 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
847 | ret->i_blocks = 0; |
848 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
849 | } | |
850 | return ret; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
854 | size_t count, loff_t *ppos) | |
855 | { | |
856 | char *page = NULL; | |
857 | ssize_t length; | |
1da177e4 LT |
858 | ssize_t ret; |
859 | int cur_enforcing; | |
d313f948 SS |
860 | struct inode *inode = filep->f_path.dentry->d_inode; |
861 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
862 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 863 | |
bb003079 | 864 | mutex_lock(&sel_mutex); |
1da177e4 | 865 | |
d313f948 SS |
866 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
867 | ret = -EINVAL; | |
868 | goto out; | |
869 | } | |
1da177e4 | 870 | |
bfd51626 | 871 | if (count > PAGE_SIZE) { |
1da177e4 LT |
872 | ret = -EINVAL; |
873 | goto out; | |
874 | } | |
875 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { | |
876 | ret = -ENOMEM; | |
877 | goto out; | |
878 | } | |
879 | ||
d313f948 | 880 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
881 | if (cur_enforcing < 0) { |
882 | ret = cur_enforcing; | |
883 | goto out; | |
884 | } | |
1da177e4 | 885 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 886 | bool_pending_values[index]); |
68bdcf28 | 887 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 888 | out: |
bb003079 | 889 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
890 | if (page) |
891 | free_page((unsigned long)page); | |
892 | return ret; | |
893 | } | |
894 | ||
895 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
896 | size_t count, loff_t *ppos) | |
897 | { | |
898 | char *page = NULL; | |
d313f948 | 899 | ssize_t length; |
1da177e4 | 900 | int new_value; |
d313f948 SS |
901 | struct inode *inode = filep->f_path.dentry->d_inode; |
902 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
903 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 904 | |
bb003079 | 905 | mutex_lock(&sel_mutex); |
1da177e4 LT |
906 | |
907 | length = task_has_security(current, SECURITY__SETBOOL); | |
908 | if (length) | |
909 | goto out; | |
910 | ||
d313f948 SS |
911 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
912 | length = -EINVAL; | |
913 | goto out; | |
914 | } | |
915 | ||
bfd51626 | 916 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
917 | length = -ENOMEM; |
918 | goto out; | |
919 | } | |
d313f948 | 920 | |
1da177e4 LT |
921 | if (*ppos != 0) { |
922 | /* No partial writes. */ | |
d313f948 | 923 | length = -EINVAL; |
1da177e4 LT |
924 | goto out; |
925 | } | |
926 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
927 | if (!page) { | |
928 | length = -ENOMEM; | |
929 | goto out; | |
930 | } | |
931 | ||
d313f948 | 932 | length = -EFAULT; |
1da177e4 LT |
933 | if (copy_from_user(page, buf, count)) |
934 | goto out; | |
935 | ||
936 | length = -EINVAL; | |
937 | if (sscanf(page, "%d", &new_value) != 1) | |
938 | goto out; | |
939 | ||
940 | if (new_value) | |
941 | new_value = 1; | |
942 | ||
d313f948 | 943 | bool_pending_values[index] = new_value; |
1da177e4 LT |
944 | length = count; |
945 | ||
946 | out: | |
bb003079 | 947 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
948 | if (page) |
949 | free_page((unsigned long) page); | |
950 | return length; | |
951 | } | |
952 | ||
9c2e08c5 | 953 | static const struct file_operations sel_bool_ops = { |
1da177e4 LT |
954 | .read = sel_read_bool, |
955 | .write = sel_write_bool, | |
956 | }; | |
957 | ||
958 | static ssize_t sel_commit_bools_write(struct file *filep, | |
959 | const char __user *buf, | |
960 | size_t count, loff_t *ppos) | |
961 | { | |
962 | char *page = NULL; | |
d313f948 | 963 | ssize_t length; |
1da177e4 LT |
964 | int new_value; |
965 | ||
bb003079 | 966 | mutex_lock(&sel_mutex); |
1da177e4 LT |
967 | |
968 | length = task_has_security(current, SECURITY__SETBOOL); | |
969 | if (length) | |
970 | goto out; | |
971 | ||
bfd51626 | 972 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
973 | length = -ENOMEM; |
974 | goto out; | |
975 | } | |
976 | if (*ppos != 0) { | |
977 | /* No partial writes. */ | |
978 | goto out; | |
979 | } | |
980 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
981 | if (!page) { | |
982 | length = -ENOMEM; | |
983 | goto out; | |
984 | } | |
985 | ||
d313f948 | 986 | length = -EFAULT; |
1da177e4 LT |
987 | if (copy_from_user(page, buf, count)) |
988 | goto out; | |
989 | ||
990 | length = -EINVAL; | |
991 | if (sscanf(page, "%d", &new_value) != 1) | |
992 | goto out; | |
993 | ||
20c19e41 | 994 | if (new_value && bool_pending_values) { |
1da177e4 LT |
995 | security_set_bools(bool_num, bool_pending_values); |
996 | } | |
997 | ||
998 | length = count; | |
999 | ||
1000 | out: | |
bb003079 | 1001 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
1002 | if (page) |
1003 | free_page((unsigned long) page); | |
1004 | return length; | |
1005 | } | |
1006 | ||
9c2e08c5 | 1007 | static const struct file_operations sel_commit_bools_ops = { |
1da177e4 LT |
1008 | .write = sel_commit_bools_write, |
1009 | }; | |
1010 | ||
0c92d7c7 | 1011 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1012 | { |
0955dc03 | 1013 | struct list_head *node; |
1da177e4 LT |
1014 | |
1015 | spin_lock(&dcache_lock); | |
1016 | node = de->d_subdirs.next; | |
1017 | while (node != &de->d_subdirs) { | |
5160ee6f | 1018 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
1019 | list_del_init(node); |
1020 | ||
1021 | if (d->d_inode) { | |
1022 | d = dget_locked(d); | |
1023 | spin_unlock(&dcache_lock); | |
1024 | d_delete(d); | |
1025 | simple_unlink(de->d_inode, d); | |
1026 | dput(d); | |
1027 | spin_lock(&dcache_lock); | |
1028 | } | |
1029 | node = de->d_subdirs.next; | |
1030 | } | |
1031 | ||
1032 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | #define BOOL_DIR_NAME "booleans" | |
1036 | ||
1037 | static int sel_make_bools(void) | |
1038 | { | |
1039 | int i, ret = 0; | |
1040 | ssize_t len; | |
1041 | struct dentry *dentry = NULL; | |
1042 | struct dentry *dir = bool_dir; | |
1043 | struct inode *inode = NULL; | |
1044 | struct inode_security_struct *isec; | |
1045 | char **names = NULL, *page; | |
1046 | int num; | |
1047 | int *values = NULL; | |
1048 | u32 sid; | |
1049 | ||
1050 | /* remove any existing files */ | |
d313f948 | 1051 | kfree(bool_pending_names); |
9a5f04bf | 1052 | kfree(bool_pending_values); |
d313f948 | 1053 | bool_pending_names = NULL; |
20c19e41 | 1054 | bool_pending_values = NULL; |
1da177e4 | 1055 | |
0c92d7c7 | 1056 | sel_remove_entries(dir); |
1da177e4 LT |
1057 | |
1058 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) | |
1059 | return -ENOMEM; | |
1060 | ||
1061 | ret = security_get_bools(&num, &names, &values); | |
1062 | if (ret != 0) | |
1063 | goto out; | |
1064 | ||
1065 | for (i = 0; i < num; i++) { | |
1066 | dentry = d_alloc_name(dir, names[i]); | |
1067 | if (!dentry) { | |
1068 | ret = -ENOMEM; | |
1069 | goto err; | |
1070 | } | |
1071 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1072 | if (!inode) { | |
1073 | ret = -ENOMEM; | |
1074 | goto err; | |
1075 | } | |
1076 | ||
1077 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1078 | if (len < 0) { | |
1079 | ret = -EINVAL; | |
1080 | goto err; | |
1081 | } else if (len >= PAGE_SIZE) { | |
1082 | ret = -ENAMETOOLONG; | |
1083 | goto err; | |
1084 | } | |
1085 | isec = (struct inode_security_struct*)inode->i_security; | |
1086 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) | |
1087 | goto err; | |
1088 | isec->sid = sid; | |
1089 | isec->initialized = 1; | |
1090 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1091 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1092 | d_add(dentry, inode); |
1093 | } | |
1094 | bool_num = num; | |
d313f948 | 1095 | bool_pending_names = names; |
1da177e4 LT |
1096 | bool_pending_values = values; |
1097 | out: | |
1098 | free_page((unsigned long)page); | |
d313f948 SS |
1099 | return ret; |
1100 | err: | |
1da177e4 | 1101 | if (names) { |
9a5f04bf JJ |
1102 | for (i = 0; i < num; i++) |
1103 | kfree(names[i]); | |
1da177e4 LT |
1104 | kfree(names); |
1105 | } | |
20c19e41 | 1106 | kfree(values); |
0c92d7c7 | 1107 | sel_remove_entries(dir); |
1da177e4 LT |
1108 | ret = -ENOMEM; |
1109 | goto out; | |
1110 | } | |
1111 | ||
1112 | #define NULL_FILE_NAME "null" | |
1113 | ||
1114 | struct dentry *selinux_null = NULL; | |
1115 | ||
1116 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1117 | size_t count, loff_t *ppos) | |
1118 | { | |
1119 | char tmpbuf[TMPBUFLEN]; | |
1120 | ssize_t length; | |
1121 | ||
1122 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1123 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1124 | } | |
1125 | ||
1126 | static ssize_t sel_write_avc_cache_threshold(struct file * file, | |
1127 | const char __user * buf, | |
1128 | size_t count, loff_t *ppos) | |
1129 | ||
1130 | { | |
1131 | char *page; | |
1132 | ssize_t ret; | |
1133 | int new_value; | |
1134 | ||
bfd51626 | 1135 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1136 | ret = -ENOMEM; |
1137 | goto out; | |
1138 | } | |
1139 | ||
1140 | if (*ppos != 0) { | |
1141 | /* No partial writes. */ | |
1142 | ret = -EINVAL; | |
1143 | goto out; | |
1144 | } | |
1145 | ||
1146 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
1147 | if (!page) { | |
1148 | ret = -ENOMEM; | |
1149 | goto out; | |
1150 | } | |
1151 | ||
1152 | if (copy_from_user(page, buf, count)) { | |
1153 | ret = -EFAULT; | |
1154 | goto out_free; | |
1155 | } | |
1156 | ||
1157 | if (sscanf(page, "%u", &new_value) != 1) { | |
1158 | ret = -EINVAL; | |
1159 | goto out; | |
1160 | } | |
1161 | ||
1162 | if (new_value != avc_cache_threshold) { | |
1163 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1164 | if (ret) | |
1165 | goto out_free; | |
1166 | avc_cache_threshold = new_value; | |
1167 | } | |
1168 | ret = count; | |
1169 | out_free: | |
1170 | free_page((unsigned long)page); | |
1171 | out: | |
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1176 | size_t count, loff_t *ppos) | |
1177 | { | |
1178 | char *page; | |
1179 | ssize_t ret = 0; | |
1180 | ||
1181 | page = (char *)__get_free_page(GFP_KERNEL); | |
1182 | if (!page) { | |
1183 | ret = -ENOMEM; | |
1184 | goto out; | |
1185 | } | |
1186 | ret = avc_get_hash_stats(page); | |
1187 | if (ret >= 0) | |
1188 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1189 | free_page((unsigned long)page); | |
1190 | out: | |
1191 | return ret; | |
1192 | } | |
1193 | ||
9c2e08c5 | 1194 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1195 | .read = sel_read_avc_cache_threshold, |
1196 | .write = sel_write_avc_cache_threshold, | |
1197 | }; | |
1198 | ||
9c2e08c5 | 1199 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1200 | .read = sel_read_avc_hash_stats, |
1201 | }; | |
1202 | ||
1203 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1204 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1205 | { | |
1206 | int cpu; | |
1207 | ||
1208 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1209 | if (!cpu_possible(cpu)) | |
1210 | continue; | |
1211 | *idx = cpu + 1; | |
1212 | return &per_cpu(avc_cache_stats, cpu); | |
1213 | } | |
1214 | return NULL; | |
1215 | } | |
1216 | ||
1217 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1218 | { | |
1219 | loff_t n = *pos - 1; | |
1220 | ||
1221 | if (*pos == 0) | |
1222 | return SEQ_START_TOKEN; | |
1223 | ||
1224 | return sel_avc_get_stat_idx(&n); | |
1225 | } | |
1226 | ||
1227 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1228 | { | |
1229 | return sel_avc_get_stat_idx(pos); | |
1230 | } | |
1231 | ||
1232 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1233 | { | |
1234 | struct avc_cache_stats *st = v; | |
1235 | ||
1236 | if (v == SEQ_START_TOKEN) | |
1237 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1238 | "frees\n"); | |
1239 | else | |
1240 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1241 | st->hits, st->misses, st->allocations, | |
1242 | st->reclaims, st->frees); | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1247 | { } | |
1248 | ||
1996a109 | 1249 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1250 | .start = sel_avc_stats_seq_start, |
1251 | .next = sel_avc_stats_seq_next, | |
1252 | .show = sel_avc_stats_seq_show, | |
1253 | .stop = sel_avc_stats_seq_stop, | |
1254 | }; | |
1255 | ||
1256 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1257 | { | |
1258 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1259 | } | |
1260 | ||
9c2e08c5 | 1261 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1262 | .open = sel_open_avc_cache_stats, |
1263 | .read = seq_read, | |
1264 | .llseek = seq_lseek, | |
1265 | .release = seq_release, | |
1266 | }; | |
1267 | #endif | |
1268 | ||
1269 | static int sel_make_avc_files(struct dentry *dir) | |
1270 | { | |
1271 | int i, ret = 0; | |
1272 | static struct tree_descr files[] = { | |
1273 | { "cache_threshold", | |
1274 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1275 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1276 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1277 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1278 | #endif | |
1279 | }; | |
1280 | ||
6e20a64a | 1281 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1282 | struct inode *inode; |
1283 | struct dentry *dentry; | |
1284 | ||
1285 | dentry = d_alloc_name(dir, files[i].name); | |
1286 | if (!dentry) { | |
1287 | ret = -ENOMEM; | |
d6aafa65 | 1288 | goto out; |
1da177e4 LT |
1289 | } |
1290 | ||
1291 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1292 | if (!inode) { | |
1293 | ret = -ENOMEM; | |
d6aafa65 | 1294 | goto out; |
1da177e4 LT |
1295 | } |
1296 | inode->i_fop = files[i].ops; | |
6174eafc | 1297 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1298 | d_add(dentry, inode); |
1299 | } | |
1300 | out: | |
1301 | return ret; | |
1da177e4 LT |
1302 | } |
1303 | ||
f0ee2e46 JC |
1304 | static ssize_t sel_read_initcon(struct file * file, char __user *buf, |
1305 | size_t count, loff_t *ppos) | |
1306 | { | |
1307 | struct inode *inode; | |
1308 | char *con; | |
1309 | u32 sid, len; | |
1310 | ssize_t ret; | |
1311 | ||
1312 | inode = file->f_path.dentry->d_inode; | |
1313 | sid = inode->i_ino&SEL_INO_MASK; | |
1314 | ret = security_sid_to_context(sid, &con, &len); | |
1315 | if (ret < 0) | |
1316 | return ret; | |
1317 | ||
1318 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1319 | kfree(con); | |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static const struct file_operations sel_initcon_ops = { | |
1324 | .read = sel_read_initcon, | |
1325 | }; | |
1326 | ||
1327 | static int sel_make_initcon_files(struct dentry *dir) | |
1328 | { | |
1329 | int i, ret = 0; | |
1330 | ||
1331 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1332 | struct inode *inode; | |
1333 | struct dentry *dentry; | |
1334 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1335 | if (!dentry) { | |
1336 | ret = -ENOMEM; | |
1337 | goto out; | |
1338 | } | |
1339 | ||
1340 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1341 | if (!inode) { | |
1342 | ret = -ENOMEM; | |
1343 | goto out; | |
1344 | } | |
1345 | inode->i_fop = &sel_initcon_ops; | |
1346 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1347 | d_add(dentry, inode); | |
1348 | } | |
1349 | out: | |
1350 | return ret; | |
1351 | } | |
1352 | ||
e47c8fc5 CP |
1353 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1354 | { | |
1355 | return a / b - (a % b < 0); | |
1356 | } | |
1357 | ||
1358 | static inline unsigned long sel_class_to_ino(u16 class) | |
1359 | { | |
1360 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1361 | } | |
1362 | ||
1363 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1364 | { | |
1365 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1366 | } | |
1367 | ||
1368 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1369 | { | |
1370 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1371 | } | |
1372 | ||
1373 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1374 | { | |
1375 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1376 | } | |
1377 | ||
1378 | static ssize_t sel_read_class(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_class(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_class_ops = { | |
1399 | .read = sel_read_class, | |
1400 | }; | |
1401 | ||
1402 | static ssize_t sel_read_perm(struct file * file, char __user *buf, | |
1403 | size_t count, loff_t *ppos) | |
1404 | { | |
1405 | ssize_t rc, len; | |
1406 | char *page; | |
1407 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1408 | ||
1409 | page = (char *)__get_free_page(GFP_KERNEL); | |
1410 | if (!page) { | |
1411 | rc = -ENOMEM; | |
1412 | goto out; | |
1413 | } | |
1414 | ||
1415 | len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); | |
1416 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1417 | free_page((unsigned long)page); | |
1418 | out: | |
1419 | return rc; | |
1420 | } | |
1421 | ||
1422 | static const struct file_operations sel_perm_ops = { | |
1423 | .read = sel_read_perm, | |
1424 | }; | |
1425 | ||
3bb56b25 PM |
1426 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1427 | size_t count, loff_t *ppos) | |
1428 | { | |
1429 | int value; | |
1430 | char tmpbuf[TMPBUFLEN]; | |
1431 | ssize_t length; | |
1432 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1433 | ||
1434 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1435 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1436 | ||
1437 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1438 | } | |
1439 | ||
1440 | static const struct file_operations sel_policycap_ops = { | |
1441 | .read = sel_read_policycap, | |
1442 | }; | |
1443 | ||
e47c8fc5 CP |
1444 | static int sel_make_perm_files(char *objclass, int classvalue, |
1445 | struct dentry *dir) | |
1446 | { | |
1447 | int i, rc = 0, nperms; | |
1448 | char **perms; | |
1449 | ||
1450 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1451 | if (rc) | |
1452 | goto out; | |
1453 | ||
1454 | for (i = 0; i < nperms; i++) { | |
1455 | struct inode *inode; | |
1456 | struct dentry *dentry; | |
1457 | ||
1458 | dentry = d_alloc_name(dir, perms[i]); | |
1459 | if (!dentry) { | |
1460 | rc = -ENOMEM; | |
1461 | goto out1; | |
1462 | } | |
1463 | ||
1464 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1465 | if (!inode) { | |
1466 | rc = -ENOMEM; | |
1467 | goto out1; | |
1468 | } | |
1469 | inode->i_fop = &sel_perm_ops; | |
1470 | /* i+1 since perm values are 1-indexed */ | |
1471 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1472 | d_add(dentry, inode); | |
1473 | } | |
1474 | ||
1475 | out1: | |
1476 | for (i = 0; i < nperms; i++) | |
1477 | kfree(perms[i]); | |
1478 | kfree(perms); | |
1479 | out: | |
1480 | return rc; | |
1481 | } | |
1482 | ||
1483 | static int sel_make_class_dir_entries(char *classname, int index, | |
1484 | struct dentry *dir) | |
1485 | { | |
1486 | struct dentry *dentry = NULL; | |
1487 | struct inode *inode = NULL; | |
1488 | int rc; | |
1489 | ||
1490 | dentry = d_alloc_name(dir, "index"); | |
1491 | if (!dentry) { | |
1492 | rc = -ENOMEM; | |
1493 | goto out; | |
1494 | } | |
1495 | ||
1496 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1497 | if (!inode) { | |
1498 | rc = -ENOMEM; | |
1499 | goto out; | |
1500 | } | |
1501 | ||
1502 | inode->i_fop = &sel_class_ops; | |
1503 | inode->i_ino = sel_class_to_ino(index); | |
1504 | d_add(dentry, inode); | |
1505 | ||
1506 | dentry = d_alloc_name(dir, "perms"); | |
1507 | if (!dentry) { | |
1508 | rc = -ENOMEM; | |
1509 | goto out; | |
1510 | } | |
1511 | ||
1512 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1513 | if (rc) | |
1514 | goto out; | |
1515 | ||
1516 | rc = sel_make_perm_files(classname, index, dentry); | |
1517 | ||
1518 | out: | |
1519 | return rc; | |
1520 | } | |
1521 | ||
1522 | static void sel_remove_classes(void) | |
1523 | { | |
1524 | struct list_head *class_node; | |
1525 | ||
1526 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1527 | struct dentry *class_subdir = list_entry(class_node, | |
1528 | struct dentry, d_u.d_child); | |
1529 | struct list_head *class_subdir_node; | |
1530 | ||
1531 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1532 | struct dentry *d = list_entry(class_subdir_node, | |
1533 | struct dentry, d_u.d_child); | |
1534 | ||
1535 | if (d->d_inode) | |
1536 | if (d->d_inode->i_mode & S_IFDIR) | |
1537 | sel_remove_entries(d); | |
1538 | } | |
1539 | ||
1540 | sel_remove_entries(class_subdir); | |
1541 | } | |
1542 | ||
1543 | sel_remove_entries(class_dir); | |
1544 | } | |
1545 | ||
1546 | static int sel_make_classes(void) | |
1547 | { | |
1548 | int rc = 0, nclasses, i; | |
1549 | char **classes; | |
1550 | ||
1551 | /* delete any existing entries */ | |
1552 | sel_remove_classes(); | |
1553 | ||
1554 | rc = security_get_classes(&classes, &nclasses); | |
1555 | if (rc < 0) | |
1556 | goto out; | |
1557 | ||
1558 | /* +2 since classes are 1-indexed */ | |
1559 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1560 | ||
1561 | for (i = 0; i < nclasses; i++) { | |
1562 | struct dentry *class_name_dir; | |
1563 | ||
1564 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1565 | if (!class_name_dir) { | |
1566 | rc = -ENOMEM; | |
1567 | goto out1; | |
1568 | } | |
1569 | ||
1570 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1571 | &last_class_ino); | |
1572 | if (rc) | |
1573 | goto out1; | |
1574 | ||
1575 | /* i+1 since class values are 1-indexed */ | |
1576 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1577 | class_name_dir); | |
1578 | if (rc) | |
1579 | goto out1; | |
1580 | } | |
1581 | ||
1582 | out1: | |
1583 | for (i = 0; i < nclasses; i++) | |
1584 | kfree(classes[i]); | |
1585 | kfree(classes); | |
1586 | out: | |
1587 | return rc; | |
1588 | } | |
1589 | ||
3bb56b25 PM |
1590 | static int sel_make_policycap(void) |
1591 | { | |
1592 | unsigned int iter; | |
1593 | struct dentry *dentry = NULL; | |
1594 | struct inode *inode = NULL; | |
1595 | ||
1596 | sel_remove_entries(policycap_dir); | |
1597 | ||
1598 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1599 | if (iter < ARRAY_SIZE(policycap_names)) | |
1600 | dentry = d_alloc_name(policycap_dir, | |
1601 | policycap_names[iter]); | |
1602 | else | |
1603 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1604 | ||
1605 | if (dentry == NULL) | |
1606 | return -ENOMEM; | |
1607 | ||
1608 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1609 | if (inode == NULL) | |
1610 | return -ENOMEM; | |
1611 | ||
1612 | inode->i_fop = &sel_policycap_ops; | |
1613 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1614 | d_add(dentry, inode); | |
1615 | } | |
1616 | ||
1617 | return 0; | |
1618 | } | |
1619 | ||
0dd4ae51 CP |
1620 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1621 | unsigned long *ino) | |
1da177e4 LT |
1622 | { |
1623 | int ret = 0; | |
1624 | struct inode *inode; | |
1625 | ||
edb20fb5 | 1626 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1627 | if (!inode) { |
1628 | ret = -ENOMEM; | |
1629 | goto out; | |
1630 | } | |
1631 | inode->i_op = &simple_dir_inode_operations; | |
1632 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1633 | inode->i_ino = ++(*ino); |
40e906f8 | 1634 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1635 | inc_nlink(inode); |
1da177e4 | 1636 | d_add(dentry, inode); |
edb20fb5 | 1637 | /* bump link count on parent directory, too */ |
d8c76e6f | 1638 | inc_nlink(dir); |
1da177e4 LT |
1639 | out: |
1640 | return ret; | |
1641 | } | |
1642 | ||
1643 | static int sel_fill_super(struct super_block * sb, void * data, int silent) | |
1644 | { | |
1645 | int ret; | |
1646 | struct dentry *dentry; | |
edb20fb5 | 1647 | struct inode *inode, *root_inode; |
1da177e4 LT |
1648 | struct inode_security_struct *isec; |
1649 | ||
1650 | static struct tree_descr selinux_files[] = { | |
1651 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1652 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1653 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1654 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1655 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1656 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1657 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1658 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1659 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1660 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1661 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1662 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1663 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1664 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1665 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1666 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1667 | /* last one */ {""} |
1668 | }; | |
1669 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1670 | if (ret) | |
161ce45a | 1671 | goto err; |
1da177e4 | 1672 | |
edb20fb5 JM |
1673 | root_inode = sb->s_root->d_inode; |
1674 | ||
1da177e4 | 1675 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1676 | if (!dentry) { |
1677 | ret = -ENOMEM; | |
1678 | goto err; | |
1679 | } | |
1da177e4 | 1680 | |
0dd4ae51 | 1681 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1682 | if (ret) |
161ce45a | 1683 | goto err; |
cde174a8 | 1684 | |
1da177e4 | 1685 | bool_dir = dentry; |
1da177e4 LT |
1686 | |
1687 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1688 | if (!dentry) { |
1689 | ret = -ENOMEM; | |
1690 | goto err; | |
1691 | } | |
1da177e4 LT |
1692 | |
1693 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1694 | if (!inode) { |
1695 | ret = -ENOMEM; | |
1696 | goto err; | |
1697 | } | |
6174eafc | 1698 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1699 | isec = (struct inode_security_struct*)inode->i_security; |
1700 | isec->sid = SECINITSID_DEVNULL; | |
1701 | isec->sclass = SECCLASS_CHR_FILE; | |
1702 | isec->initialized = 1; | |
1703 | ||
1704 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1705 | d_add(dentry, inode); | |
1706 | selinux_null = dentry; | |
1707 | ||
1708 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1709 | if (!dentry) { |
1710 | ret = -ENOMEM; | |
1711 | goto err; | |
1712 | } | |
1da177e4 | 1713 | |
0dd4ae51 | 1714 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1715 | if (ret) |
161ce45a | 1716 | goto err; |
1da177e4 LT |
1717 | |
1718 | ret = sel_make_avc_files(dentry); | |
1719 | if (ret) | |
161ce45a | 1720 | goto err; |
f0ee2e46 JC |
1721 | |
1722 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1723 | if (!dentry) { | |
1724 | ret = -ENOMEM; | |
1725 | goto err; | |
1726 | } | |
1727 | ||
0dd4ae51 | 1728 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1729 | if (ret) |
1730 | goto err; | |
1731 | ||
1732 | ret = sel_make_initcon_files(dentry); | |
1733 | if (ret) | |
1734 | goto err; | |
1735 | ||
e47c8fc5 CP |
1736 | dentry = d_alloc_name(sb->s_root, "class"); |
1737 | if (!dentry) { | |
1738 | ret = -ENOMEM; | |
1739 | goto err; | |
1740 | } | |
1741 | ||
1742 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1743 | if (ret) | |
1744 | goto err; | |
1745 | ||
1746 | class_dir = dentry; | |
1747 | ||
3bb56b25 PM |
1748 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1749 | if (!dentry) { | |
1750 | ret = -ENOMEM; | |
1751 | goto err; | |
1752 | } | |
1753 | ||
1754 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1755 | if (ret) | |
1756 | goto err; | |
1757 | ||
1758 | policycap_dir = dentry; | |
1759 | ||
1da177e4 | 1760 | out: |
161ce45a JM |
1761 | return ret; |
1762 | err: | |
1da177e4 | 1763 | printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); |
161ce45a | 1764 | goto out; |
1da177e4 LT |
1765 | } |
1766 | ||
454e2398 DH |
1767 | static int sel_get_sb(struct file_system_type *fs_type, |
1768 | int flags, const char *dev_name, void *data, | |
1769 | struct vfsmount *mnt) | |
1da177e4 | 1770 | { |
454e2398 | 1771 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1772 | } |
1773 | ||
1774 | static struct file_system_type sel_fs_type = { | |
1775 | .name = "selinuxfs", | |
1776 | .get_sb = sel_get_sb, | |
1777 | .kill_sb = kill_litter_super, | |
1778 | }; | |
1779 | ||
1780 | struct vfsmount *selinuxfs_mount; | |
1781 | ||
1782 | static int __init init_sel_fs(void) | |
1783 | { | |
1784 | int err; | |
1785 | ||
1786 | if (!selinux_enabled) | |
1787 | return 0; | |
1788 | err = register_filesystem(&sel_fs_type); | |
1789 | if (!err) { | |
1790 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1791 | if (IS_ERR(selinuxfs_mount)) { | |
1792 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1793 | err = PTR_ERR(selinuxfs_mount); | |
1794 | selinuxfs_mount = NULL; | |
1795 | } | |
1796 | } | |
1797 | return err; | |
1798 | } | |
1799 | ||
1800 | __initcall(init_sel_fs); | |
1801 | ||
1802 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1803 | void exit_sel_fs(void) | |
1804 | { | |
1805 | unregister_filesystem(&sel_fs_type); | |
1806 | } | |
1807 | #endif |