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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 SG |
174 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
175 | "enforcing=%d old_enforcing=%d auid=%u", new_value, | |
176 | selinux_enforcing, | |
0c11b942 | 177 | audit_get_loginuid(current)); |
1da177e4 LT |
178 | selinux_enforcing = new_value; |
179 | if (selinux_enforcing) | |
180 | avc_ss_reset(0); | |
181 | selnl_notify_setenforce(selinux_enforcing); | |
182 | } | |
183 | length = count; | |
184 | out: | |
185 | free_page((unsigned long) page); | |
186 | return length; | |
187 | } | |
188 | #else | |
189 | #define sel_write_enforce NULL | |
190 | #endif | |
191 | ||
9c2e08c5 | 192 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
193 | .read = sel_read_enforce, |
194 | .write = sel_write_enforce, | |
195 | }; | |
196 | ||
3f12070e EP |
197 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
198 | size_t count, loff_t *ppos) | |
199 | { | |
200 | char tmpbuf[TMPBUFLEN]; | |
201 | ssize_t length; | |
202 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
203 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
204 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
205 | ||
206 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
207 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
208 | } | |
209 | ||
210 | static const struct file_operations sel_handle_unknown_ops = { | |
211 | .read = sel_read_handle_unknown, | |
212 | }; | |
213 | ||
1da177e4 LT |
214 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
215 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, | |
216 | size_t count, loff_t *ppos) | |
217 | ||
218 | { | |
219 | char *page; | |
220 | ssize_t length; | |
221 | int new_value; | |
222 | extern int selinux_disable(void); | |
223 | ||
bfd51626 | 224 | if (count >= PAGE_SIZE) |
1da177e4 LT |
225 | return -ENOMEM; |
226 | if (*ppos != 0) { | |
227 | /* No partial writes. */ | |
228 | return -EINVAL; | |
229 | } | |
230 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
231 | if (!page) | |
232 | return -ENOMEM; | |
233 | length = -EFAULT; | |
234 | if (copy_from_user(page, buf, count)) | |
235 | goto out; | |
236 | ||
237 | length = -EINVAL; | |
238 | if (sscanf(page, "%d", &new_value) != 1) | |
239 | goto out; | |
240 | ||
241 | if (new_value) { | |
242 | length = selinux_disable(); | |
243 | if (length < 0) | |
244 | goto out; | |
af601e46 SG |
245 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
246 | "selinux=0 auid=%u", | |
0c11b942 | 247 | audit_get_loginuid(current)); |
1da177e4 LT |
248 | } |
249 | ||
250 | length = count; | |
251 | out: | |
252 | free_page((unsigned long) page); | |
253 | return length; | |
254 | } | |
255 | #else | |
256 | #define sel_write_disable NULL | |
257 | #endif | |
258 | ||
9c2e08c5 | 259 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
260 | .write = sel_write_disable, |
261 | }; | |
262 | ||
263 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
264 | size_t count, loff_t *ppos) | |
265 | { | |
266 | char tmpbuf[TMPBUFLEN]; | |
267 | ssize_t length; | |
268 | ||
269 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
270 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
271 | } | |
272 | ||
9c2e08c5 | 273 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
274 | .read = sel_read_policyvers, |
275 | }; | |
276 | ||
277 | /* declaration for sel_write_load */ | |
278 | static int sel_make_bools(void); | |
e47c8fc5 | 279 | static int sel_make_classes(void); |
3bb56b25 | 280 | static int sel_make_policycap(void); |
e47c8fc5 CP |
281 | |
282 | /* declaration for sel_make_class_dirs */ | |
283 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
284 | unsigned long *ino); | |
1da177e4 LT |
285 | |
286 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
287 | size_t count, loff_t *ppos) | |
288 | { | |
289 | char tmpbuf[TMPBUFLEN]; | |
290 | ssize_t length; | |
291 | ||
292 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
293 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
294 | } | |
295 | ||
9c2e08c5 | 296 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
297 | .read = sel_read_mls, |
298 | }; | |
299 | ||
300 | static ssize_t sel_write_load(struct file * file, const char __user * buf, | |
301 | size_t count, loff_t *ppos) | |
302 | ||
303 | { | |
304 | int ret; | |
305 | ssize_t length; | |
306 | void *data = NULL; | |
307 | ||
bb003079 | 308 | mutex_lock(&sel_mutex); |
1da177e4 LT |
309 | |
310 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
311 | if (length) | |
312 | goto out; | |
313 | ||
314 | if (*ppos != 0) { | |
315 | /* No partial writes. */ | |
316 | length = -EINVAL; | |
317 | goto out; | |
318 | } | |
319 | ||
bfd51626 | 320 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
321 | || (data = vmalloc(count)) == NULL) { |
322 | length = -ENOMEM; | |
323 | goto out; | |
324 | } | |
325 | ||
326 | length = -EFAULT; | |
327 | if (copy_from_user(data, buf, count) != 0) | |
328 | goto out; | |
329 | ||
330 | length = security_load_policy(data, count); | |
331 | if (length) | |
332 | goto out; | |
333 | ||
334 | ret = sel_make_bools(); | |
e47c8fc5 CP |
335 | if (ret) { |
336 | length = ret; | |
337 | goto out1; | |
338 | } | |
339 | ||
340 | ret = sel_make_classes(); | |
3bb56b25 PM |
341 | if (ret) { |
342 | length = ret; | |
343 | goto out1; | |
344 | } | |
345 | ||
346 | ret = sel_make_policycap(); | |
1da177e4 LT |
347 | if (ret) |
348 | length = ret; | |
349 | else | |
350 | length = count; | |
e47c8fc5 CP |
351 | |
352 | out1: | |
3f12070e EP |
353 | |
354 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", | |
355 | (security_get_reject_unknown() ? "reject" : | |
356 | (security_get_allow_unknown() ? "allow" : "deny"))); | |
357 | ||
af601e46 SG |
358 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
359 | "policy loaded auid=%u", | |
0c11b942 | 360 | audit_get_loginuid(current)); |
1da177e4 | 361 | out: |
bb003079 | 362 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
363 | vfree(data); |
364 | return length; | |
365 | } | |
366 | ||
9c2e08c5 | 367 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
368 | .write = sel_write_load, |
369 | }; | |
370 | ||
ce9982d0 | 371 | static ssize_t sel_write_context(struct file * file, char *buf, size_t size) |
1da177e4 | 372 | { |
ce9982d0 SS |
373 | char *canon; |
374 | u32 sid, len; | |
1da177e4 LT |
375 | ssize_t length; |
376 | ||
377 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
378 | if (length) | |
379 | return length; | |
380 | ||
ce9982d0 SS |
381 | length = security_context_to_sid(buf, size, &sid); |
382 | if (length < 0) | |
383 | return length; | |
1da177e4 | 384 | |
ce9982d0 | 385 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 386 | if (length < 0) |
ce9982d0 SS |
387 | return length; |
388 | ||
389 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
390 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
391 | "max\n", __FUNCTION__, len); | |
392 | length = -ERANGE; | |
1da177e4 | 393 | goto out; |
ce9982d0 | 394 | } |
1da177e4 | 395 | |
ce9982d0 SS |
396 | memcpy(buf, canon, len); |
397 | length = len; | |
1da177e4 | 398 | out: |
ce9982d0 | 399 | kfree(canon); |
1da177e4 LT |
400 | return length; |
401 | } | |
402 | ||
1da177e4 LT |
403 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
404 | size_t count, loff_t *ppos) | |
405 | { | |
406 | char tmpbuf[TMPBUFLEN]; | |
407 | ssize_t length; | |
408 | ||
409 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
410 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
411 | } | |
412 | ||
413 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, | |
414 | size_t count, loff_t *ppos) | |
415 | { | |
416 | char *page; | |
417 | ssize_t length; | |
418 | unsigned int new_value; | |
419 | ||
420 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
421 | if (length) | |
422 | return length; | |
423 | ||
bfd51626 | 424 | if (count >= PAGE_SIZE) |
1da177e4 LT |
425 | return -ENOMEM; |
426 | if (*ppos != 0) { | |
427 | /* No partial writes. */ | |
428 | return -EINVAL; | |
429 | } | |
430 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
431 | if (!page) | |
432 | return -ENOMEM; | |
433 | length = -EFAULT; | |
434 | if (copy_from_user(page, buf, count)) | |
435 | goto out; | |
436 | ||
437 | length = -EINVAL; | |
438 | if (sscanf(page, "%u", &new_value) != 1) | |
439 | goto out; | |
440 | ||
441 | selinux_checkreqprot = new_value ? 1 : 0; | |
442 | length = count; | |
443 | out: | |
444 | free_page((unsigned long) page); | |
445 | return length; | |
446 | } | |
9c2e08c5 | 447 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
448 | .read = sel_read_checkreqprot, |
449 | .write = sel_write_checkreqprot, | |
450 | }; | |
451 | ||
4e5ab4cb JM |
452 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
453 | size_t count, loff_t *ppos) | |
454 | { | |
455 | char tmpbuf[TMPBUFLEN]; | |
456 | ssize_t length; | |
457 | ||
458 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
459 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
460 | } | |
461 | ||
462 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, | |
463 | size_t count, loff_t *ppos) | |
464 | { | |
465 | char *page; | |
466 | ssize_t length; | |
467 | int new_value; | |
468 | ||
469 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
470 | if (length) | |
471 | return length; | |
472 | ||
473 | if (count >= PAGE_SIZE) | |
474 | return -ENOMEM; | |
475 | if (*ppos != 0) { | |
476 | /* No partial writes. */ | |
477 | return -EINVAL; | |
478 | } | |
479 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
480 | if (!page) | |
481 | return -ENOMEM; | |
482 | length = -EFAULT; | |
483 | if (copy_from_user(page, buf, count)) | |
484 | goto out; | |
485 | ||
486 | length = -EINVAL; | |
487 | if (sscanf(page, "%d", &new_value) != 1) | |
488 | goto out; | |
489 | ||
490 | selinux_compat_net = new_value ? 1 : 0; | |
491 | length = count; | |
492 | out: | |
493 | free_page((unsigned long) page); | |
494 | return length; | |
495 | } | |
9c2e08c5 | 496 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
497 | .read = sel_read_compat_net, |
498 | .write = sel_write_compat_net, | |
499 | }; | |
500 | ||
1da177e4 LT |
501 | /* |
502 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
503 | */ | |
504 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); | |
505 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); | |
506 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); | |
507 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); | |
508 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); | |
509 | ||
510 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
511 | [SEL_ACCESS] = sel_write_access, | |
512 | [SEL_CREATE] = sel_write_create, | |
513 | [SEL_RELABEL] = sel_write_relabel, | |
514 | [SEL_USER] = sel_write_user, | |
515 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 516 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
517 | }; |
518 | ||
519 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
520 | { | |
3d5ff529 | 521 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
522 | char *data; |
523 | ssize_t rv; | |
524 | ||
6e20a64a | 525 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
526 | return -EINVAL; |
527 | ||
528 | data = simple_transaction_get(file, buf, size); | |
529 | if (IS_ERR(data)) | |
530 | return PTR_ERR(data); | |
531 | ||
532 | rv = write_op[ino](file, data, size); | |
533 | if (rv>0) { | |
534 | simple_transaction_set(file, rv); | |
535 | rv = size; | |
536 | } | |
537 | return rv; | |
538 | } | |
539 | ||
9c2e08c5 | 540 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
541 | .write = selinux_transaction_write, |
542 | .read = simple_transaction_read, | |
543 | .release = simple_transaction_release, | |
544 | }; | |
545 | ||
546 | /* | |
547 | * payload - write methods | |
548 | * If the method has a response, the response should be put in buf, | |
549 | * and the length returned. Otherwise return 0 or and -error. | |
550 | */ | |
551 | ||
552 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) | |
553 | { | |
554 | char *scon, *tcon; | |
555 | u32 ssid, tsid; | |
556 | u16 tclass; | |
557 | u32 req; | |
558 | struct av_decision avd; | |
559 | ssize_t length; | |
560 | ||
561 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
562 | if (length) | |
563 | return length; | |
564 | ||
565 | length = -ENOMEM; | |
89d155ef | 566 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
567 | if (!scon) |
568 | return length; | |
1da177e4 | 569 | |
89d155ef | 570 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
571 | if (!tcon) |
572 | goto out; | |
1da177e4 LT |
573 | |
574 | length = -EINVAL; | |
575 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
576 | goto out2; | |
577 | ||
578 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
579 | if (length < 0) | |
580 | goto out2; | |
581 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
582 | if (length < 0) | |
583 | goto out2; | |
584 | ||
585 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
586 | if (length < 0) | |
587 | goto out2; | |
588 | ||
589 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
590 | "%x %x %x %x %u", | |
591 | avd.allowed, avd.decided, | |
592 | avd.auditallow, avd.auditdeny, | |
593 | avd.seqno); | |
594 | out2: | |
595 | kfree(tcon); | |
596 | out: | |
597 | kfree(scon); | |
598 | return length; | |
599 | } | |
600 | ||
601 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) | |
602 | { | |
603 | char *scon, *tcon; | |
604 | u32 ssid, tsid, newsid; | |
605 | u16 tclass; | |
606 | ssize_t length; | |
607 | char *newcon; | |
608 | u32 len; | |
609 | ||
610 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
611 | if (length) | |
612 | return length; | |
613 | ||
614 | length = -ENOMEM; | |
89d155ef | 615 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
616 | if (!scon) |
617 | return length; | |
1da177e4 | 618 | |
89d155ef | 619 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
620 | if (!tcon) |
621 | goto out; | |
1da177e4 LT |
622 | |
623 | length = -EINVAL; | |
624 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
625 | goto out2; | |
626 | ||
627 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
628 | if (length < 0) | |
629 | goto out2; | |
630 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
631 | if (length < 0) | |
632 | goto out2; | |
633 | ||
634 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
635 | if (length < 0) | |
636 | goto out2; | |
637 | ||
638 | length = security_sid_to_context(newsid, &newcon, &len); | |
639 | if (length < 0) | |
640 | goto out2; | |
641 | ||
642 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
643 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
644 | "max\n", __FUNCTION__, len); | |
645 | length = -ERANGE; | |
646 | goto out3; | |
647 | } | |
648 | ||
649 | memcpy(buf, newcon, len); | |
650 | length = len; | |
651 | out3: | |
652 | kfree(newcon); | |
653 | out2: | |
654 | kfree(tcon); | |
655 | out: | |
656 | kfree(scon); | |
657 | return length; | |
658 | } | |
659 | ||
660 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) | |
661 | { | |
662 | char *scon, *tcon; | |
663 | u32 ssid, tsid, newsid; | |
664 | u16 tclass; | |
665 | ssize_t length; | |
666 | char *newcon; | |
667 | u32 len; | |
668 | ||
669 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
670 | if (length) | |
671 | return length; | |
672 | ||
673 | length = -ENOMEM; | |
89d155ef | 674 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
675 | if (!scon) |
676 | return length; | |
1da177e4 | 677 | |
89d155ef | 678 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
679 | if (!tcon) |
680 | goto out; | |
1da177e4 LT |
681 | |
682 | length = -EINVAL; | |
683 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
684 | goto out2; | |
685 | ||
686 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
687 | if (length < 0) | |
688 | goto out2; | |
689 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
690 | if (length < 0) | |
691 | goto out2; | |
692 | ||
693 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
694 | if (length < 0) | |
695 | goto out2; | |
696 | ||
697 | length = security_sid_to_context(newsid, &newcon, &len); | |
698 | if (length < 0) | |
699 | goto out2; | |
700 | ||
701 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
702 | length = -ERANGE; | |
703 | goto out3; | |
704 | } | |
705 | ||
706 | memcpy(buf, newcon, len); | |
707 | length = len; | |
708 | out3: | |
709 | kfree(newcon); | |
710 | out2: | |
711 | kfree(tcon); | |
712 | out: | |
713 | kfree(scon); | |
714 | return length; | |
715 | } | |
716 | ||
717 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) | |
718 | { | |
719 | char *con, *user, *ptr; | |
720 | u32 sid, *sids; | |
721 | ssize_t length; | |
722 | char *newcon; | |
723 | int i, rc; | |
724 | u32 len, nsids; | |
725 | ||
726 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
727 | if (length) | |
728 | return length; | |
729 | ||
730 | length = -ENOMEM; | |
89d155ef | 731 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
732 | if (!con) |
733 | return length; | |
1da177e4 | 734 | |
89d155ef | 735 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
736 | if (!user) |
737 | goto out; | |
1da177e4 LT |
738 | |
739 | length = -EINVAL; | |
740 | if (sscanf(buf, "%s %s", con, user) != 2) | |
741 | goto out2; | |
742 | ||
743 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
744 | if (length < 0) | |
745 | goto out2; | |
746 | ||
747 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
748 | if (length < 0) | |
749 | goto out2; | |
750 | ||
751 | length = sprintf(buf, "%u", nsids) + 1; | |
752 | ptr = buf + length; | |
753 | for (i = 0; i < nsids; i++) { | |
754 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
755 | if (rc) { | |
756 | length = rc; | |
757 | goto out3; | |
758 | } | |
759 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
760 | kfree(newcon); | |
761 | length = -ERANGE; | |
762 | goto out3; | |
763 | } | |
764 | memcpy(ptr, newcon, len); | |
765 | kfree(newcon); | |
766 | ptr += len; | |
767 | length += len; | |
768 | } | |
769 | out3: | |
770 | kfree(sids); | |
771 | out2: | |
772 | kfree(user); | |
773 | out: | |
774 | kfree(con); | |
775 | return length; | |
776 | } | |
777 | ||
778 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) | |
779 | { | |
780 | char *scon, *tcon; | |
781 | u32 ssid, tsid, newsid; | |
782 | u16 tclass; | |
783 | ssize_t length; | |
784 | char *newcon; | |
785 | u32 len; | |
786 | ||
787 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
788 | if (length) | |
789 | return length; | |
790 | ||
791 | length = -ENOMEM; | |
89d155ef | 792 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
793 | if (!scon) |
794 | return length; | |
1da177e4 | 795 | |
89d155ef | 796 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
797 | if (!tcon) |
798 | goto out; | |
1da177e4 LT |
799 | |
800 | length = -EINVAL; | |
801 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
802 | goto out2; | |
803 | ||
804 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
805 | if (length < 0) | |
806 | goto out2; | |
807 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
808 | if (length < 0) | |
809 | goto out2; | |
810 | ||
811 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
812 | if (length < 0) | |
813 | goto out2; | |
814 | ||
815 | length = security_sid_to_context(newsid, &newcon, &len); | |
816 | if (length < 0) | |
817 | goto out2; | |
818 | ||
819 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
820 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
821 | "max\n", __FUNCTION__, len); | |
822 | length = -ERANGE; | |
823 | goto out3; | |
824 | } | |
825 | ||
826 | memcpy(buf, newcon, len); | |
827 | length = len; | |
828 | out3: | |
829 | kfree(newcon); | |
830 | out2: | |
831 | kfree(tcon); | |
832 | out: | |
833 | kfree(scon); | |
834 | return length; | |
835 | } | |
836 | ||
837 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
838 | { | |
839 | struct inode *ret = new_inode(sb); | |
840 | ||
841 | if (ret) { | |
842 | ret->i_mode = mode; | |
843 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
844 | ret->i_blocks = 0; |
845 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
846 | } | |
847 | return ret; | |
848 | } | |
849 | ||
1da177e4 LT |
850 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
851 | size_t count, loff_t *ppos) | |
852 | { | |
853 | char *page = NULL; | |
854 | ssize_t length; | |
1da177e4 LT |
855 | ssize_t ret; |
856 | int cur_enforcing; | |
d313f948 SS |
857 | struct inode *inode = filep->f_path.dentry->d_inode; |
858 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
859 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 860 | |
bb003079 | 861 | mutex_lock(&sel_mutex); |
1da177e4 | 862 | |
d313f948 SS |
863 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
864 | ret = -EINVAL; | |
865 | goto out; | |
866 | } | |
1da177e4 | 867 | |
bfd51626 | 868 | if (count > PAGE_SIZE) { |
1da177e4 LT |
869 | ret = -EINVAL; |
870 | goto out; | |
871 | } | |
872 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { | |
873 | ret = -ENOMEM; | |
874 | goto out; | |
875 | } | |
876 | ||
d313f948 | 877 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
878 | if (cur_enforcing < 0) { |
879 | ret = cur_enforcing; | |
880 | goto out; | |
881 | } | |
1da177e4 | 882 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 883 | bool_pending_values[index]); |
68bdcf28 | 884 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 885 | out: |
bb003079 | 886 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
887 | if (page) |
888 | free_page((unsigned long)page); | |
889 | return ret; | |
890 | } | |
891 | ||
892 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
893 | size_t count, loff_t *ppos) | |
894 | { | |
895 | char *page = NULL; | |
d313f948 | 896 | ssize_t length; |
1da177e4 | 897 | int new_value; |
d313f948 SS |
898 | struct inode *inode = filep->f_path.dentry->d_inode; |
899 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
900 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 901 | |
bb003079 | 902 | mutex_lock(&sel_mutex); |
1da177e4 LT |
903 | |
904 | length = task_has_security(current, SECURITY__SETBOOL); | |
905 | if (length) | |
906 | goto out; | |
907 | ||
d313f948 SS |
908 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
909 | length = -EINVAL; | |
910 | goto out; | |
911 | } | |
912 | ||
bfd51626 | 913 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
914 | length = -ENOMEM; |
915 | goto out; | |
916 | } | |
d313f948 | 917 | |
1da177e4 LT |
918 | if (*ppos != 0) { |
919 | /* No partial writes. */ | |
d313f948 | 920 | length = -EINVAL; |
1da177e4 LT |
921 | goto out; |
922 | } | |
923 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
924 | if (!page) { | |
925 | length = -ENOMEM; | |
926 | goto out; | |
927 | } | |
928 | ||
d313f948 | 929 | length = -EFAULT; |
1da177e4 LT |
930 | if (copy_from_user(page, buf, count)) |
931 | goto out; | |
932 | ||
933 | length = -EINVAL; | |
934 | if (sscanf(page, "%d", &new_value) != 1) | |
935 | goto out; | |
936 | ||
937 | if (new_value) | |
938 | new_value = 1; | |
939 | ||
d313f948 | 940 | bool_pending_values[index] = new_value; |
1da177e4 LT |
941 | length = count; |
942 | ||
943 | out: | |
bb003079 | 944 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
945 | if (page) |
946 | free_page((unsigned long) page); | |
947 | return length; | |
948 | } | |
949 | ||
9c2e08c5 | 950 | static const struct file_operations sel_bool_ops = { |
1da177e4 LT |
951 | .read = sel_read_bool, |
952 | .write = sel_write_bool, | |
953 | }; | |
954 | ||
955 | static ssize_t sel_commit_bools_write(struct file *filep, | |
956 | const char __user *buf, | |
957 | size_t count, loff_t *ppos) | |
958 | { | |
959 | char *page = NULL; | |
d313f948 | 960 | ssize_t length; |
1da177e4 LT |
961 | int new_value; |
962 | ||
bb003079 | 963 | mutex_lock(&sel_mutex); |
1da177e4 LT |
964 | |
965 | length = task_has_security(current, SECURITY__SETBOOL); | |
966 | if (length) | |
967 | goto out; | |
968 | ||
bfd51626 | 969 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
970 | length = -ENOMEM; |
971 | goto out; | |
972 | } | |
973 | if (*ppos != 0) { | |
974 | /* No partial writes. */ | |
975 | goto out; | |
976 | } | |
977 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
978 | if (!page) { | |
979 | length = -ENOMEM; | |
980 | goto out; | |
981 | } | |
982 | ||
d313f948 | 983 | length = -EFAULT; |
1da177e4 LT |
984 | if (copy_from_user(page, buf, count)) |
985 | goto out; | |
986 | ||
987 | length = -EINVAL; | |
988 | if (sscanf(page, "%d", &new_value) != 1) | |
989 | goto out; | |
990 | ||
20c19e41 | 991 | if (new_value && bool_pending_values) { |
1da177e4 LT |
992 | security_set_bools(bool_num, bool_pending_values); |
993 | } | |
994 | ||
995 | length = count; | |
996 | ||
997 | out: | |
bb003079 | 998 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
999 | if (page) |
1000 | free_page((unsigned long) page); | |
1001 | return length; | |
1002 | } | |
1003 | ||
9c2e08c5 | 1004 | static const struct file_operations sel_commit_bools_ops = { |
1da177e4 LT |
1005 | .write = sel_commit_bools_write, |
1006 | }; | |
1007 | ||
0c92d7c7 | 1008 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1009 | { |
0955dc03 | 1010 | struct list_head *node; |
1da177e4 LT |
1011 | |
1012 | spin_lock(&dcache_lock); | |
1013 | node = de->d_subdirs.next; | |
1014 | while (node != &de->d_subdirs) { | |
5160ee6f | 1015 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
1016 | list_del_init(node); |
1017 | ||
1018 | if (d->d_inode) { | |
1019 | d = dget_locked(d); | |
1020 | spin_unlock(&dcache_lock); | |
1021 | d_delete(d); | |
1022 | simple_unlink(de->d_inode, d); | |
1023 | dput(d); | |
1024 | spin_lock(&dcache_lock); | |
1025 | } | |
1026 | node = de->d_subdirs.next; | |
1027 | } | |
1028 | ||
1029 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1030 | } |
1031 | ||
1032 | #define BOOL_DIR_NAME "booleans" | |
1033 | ||
1034 | static int sel_make_bools(void) | |
1035 | { | |
1036 | int i, ret = 0; | |
1037 | ssize_t len; | |
1038 | struct dentry *dentry = NULL; | |
1039 | struct dentry *dir = bool_dir; | |
1040 | struct inode *inode = NULL; | |
1041 | struct inode_security_struct *isec; | |
1042 | char **names = NULL, *page; | |
1043 | int num; | |
1044 | int *values = NULL; | |
1045 | u32 sid; | |
1046 | ||
1047 | /* remove any existing files */ | |
d313f948 | 1048 | kfree(bool_pending_names); |
9a5f04bf | 1049 | kfree(bool_pending_values); |
d313f948 | 1050 | bool_pending_names = NULL; |
20c19e41 | 1051 | bool_pending_values = NULL; |
1da177e4 | 1052 | |
0c92d7c7 | 1053 | sel_remove_entries(dir); |
1da177e4 LT |
1054 | |
1055 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) | |
1056 | return -ENOMEM; | |
1057 | ||
1058 | ret = security_get_bools(&num, &names, &values); | |
1059 | if (ret != 0) | |
1060 | goto out; | |
1061 | ||
1062 | for (i = 0; i < num; i++) { | |
1063 | dentry = d_alloc_name(dir, names[i]); | |
1064 | if (!dentry) { | |
1065 | ret = -ENOMEM; | |
1066 | goto err; | |
1067 | } | |
1068 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1069 | if (!inode) { | |
1070 | ret = -ENOMEM; | |
1071 | goto err; | |
1072 | } | |
1073 | ||
1074 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1075 | if (len < 0) { | |
1076 | ret = -EINVAL; | |
1077 | goto err; | |
1078 | } else if (len >= PAGE_SIZE) { | |
1079 | ret = -ENAMETOOLONG; | |
1080 | goto err; | |
1081 | } | |
1082 | isec = (struct inode_security_struct*)inode->i_security; | |
1083 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) | |
1084 | goto err; | |
1085 | isec->sid = sid; | |
1086 | isec->initialized = 1; | |
1087 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1088 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1089 | d_add(dentry, inode); |
1090 | } | |
1091 | bool_num = num; | |
d313f948 | 1092 | bool_pending_names = names; |
1da177e4 LT |
1093 | bool_pending_values = values; |
1094 | out: | |
1095 | free_page((unsigned long)page); | |
d313f948 SS |
1096 | return ret; |
1097 | err: | |
1da177e4 | 1098 | if (names) { |
9a5f04bf JJ |
1099 | for (i = 0; i < num; i++) |
1100 | kfree(names[i]); | |
1da177e4 LT |
1101 | kfree(names); |
1102 | } | |
20c19e41 | 1103 | kfree(values); |
0c92d7c7 | 1104 | sel_remove_entries(dir); |
1da177e4 LT |
1105 | ret = -ENOMEM; |
1106 | goto out; | |
1107 | } | |
1108 | ||
1109 | #define NULL_FILE_NAME "null" | |
1110 | ||
1111 | struct dentry *selinux_null = NULL; | |
1112 | ||
1113 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1114 | size_t count, loff_t *ppos) | |
1115 | { | |
1116 | char tmpbuf[TMPBUFLEN]; | |
1117 | ssize_t length; | |
1118 | ||
1119 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1120 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1121 | } | |
1122 | ||
1123 | static ssize_t sel_write_avc_cache_threshold(struct file * file, | |
1124 | const char __user * buf, | |
1125 | size_t count, loff_t *ppos) | |
1126 | ||
1127 | { | |
1128 | char *page; | |
1129 | ssize_t ret; | |
1130 | int new_value; | |
1131 | ||
bfd51626 | 1132 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1133 | ret = -ENOMEM; |
1134 | goto out; | |
1135 | } | |
1136 | ||
1137 | if (*ppos != 0) { | |
1138 | /* No partial writes. */ | |
1139 | ret = -EINVAL; | |
1140 | goto out; | |
1141 | } | |
1142 | ||
1143 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
1144 | if (!page) { | |
1145 | ret = -ENOMEM; | |
1146 | goto out; | |
1147 | } | |
1148 | ||
1149 | if (copy_from_user(page, buf, count)) { | |
1150 | ret = -EFAULT; | |
1151 | goto out_free; | |
1152 | } | |
1153 | ||
1154 | if (sscanf(page, "%u", &new_value) != 1) { | |
1155 | ret = -EINVAL; | |
1156 | goto out; | |
1157 | } | |
1158 | ||
1159 | if (new_value != avc_cache_threshold) { | |
1160 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1161 | if (ret) | |
1162 | goto out_free; | |
1163 | avc_cache_threshold = new_value; | |
1164 | } | |
1165 | ret = count; | |
1166 | out_free: | |
1167 | free_page((unsigned long)page); | |
1168 | out: | |
1169 | return ret; | |
1170 | } | |
1171 | ||
1172 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1173 | size_t count, loff_t *ppos) | |
1174 | { | |
1175 | char *page; | |
1176 | ssize_t ret = 0; | |
1177 | ||
1178 | page = (char *)__get_free_page(GFP_KERNEL); | |
1179 | if (!page) { | |
1180 | ret = -ENOMEM; | |
1181 | goto out; | |
1182 | } | |
1183 | ret = avc_get_hash_stats(page); | |
1184 | if (ret >= 0) | |
1185 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1186 | free_page((unsigned long)page); | |
1187 | out: | |
1188 | return ret; | |
1189 | } | |
1190 | ||
9c2e08c5 | 1191 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1192 | .read = sel_read_avc_cache_threshold, |
1193 | .write = sel_write_avc_cache_threshold, | |
1194 | }; | |
1195 | ||
9c2e08c5 | 1196 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1197 | .read = sel_read_avc_hash_stats, |
1198 | }; | |
1199 | ||
1200 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1201 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1202 | { | |
1203 | int cpu; | |
1204 | ||
1205 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1206 | if (!cpu_possible(cpu)) | |
1207 | continue; | |
1208 | *idx = cpu + 1; | |
1209 | return &per_cpu(avc_cache_stats, cpu); | |
1210 | } | |
1211 | return NULL; | |
1212 | } | |
1213 | ||
1214 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1215 | { | |
1216 | loff_t n = *pos - 1; | |
1217 | ||
1218 | if (*pos == 0) | |
1219 | return SEQ_START_TOKEN; | |
1220 | ||
1221 | return sel_avc_get_stat_idx(&n); | |
1222 | } | |
1223 | ||
1224 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1225 | { | |
1226 | return sel_avc_get_stat_idx(pos); | |
1227 | } | |
1228 | ||
1229 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1230 | { | |
1231 | struct avc_cache_stats *st = v; | |
1232 | ||
1233 | if (v == SEQ_START_TOKEN) | |
1234 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1235 | "frees\n"); | |
1236 | else | |
1237 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1238 | st->hits, st->misses, st->allocations, | |
1239 | st->reclaims, st->frees); | |
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1244 | { } | |
1245 | ||
1996a109 | 1246 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1247 | .start = sel_avc_stats_seq_start, |
1248 | .next = sel_avc_stats_seq_next, | |
1249 | .show = sel_avc_stats_seq_show, | |
1250 | .stop = sel_avc_stats_seq_stop, | |
1251 | }; | |
1252 | ||
1253 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1254 | { | |
1255 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1256 | } | |
1257 | ||
9c2e08c5 | 1258 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1259 | .open = sel_open_avc_cache_stats, |
1260 | .read = seq_read, | |
1261 | .llseek = seq_lseek, | |
1262 | .release = seq_release, | |
1263 | }; | |
1264 | #endif | |
1265 | ||
1266 | static int sel_make_avc_files(struct dentry *dir) | |
1267 | { | |
1268 | int i, ret = 0; | |
1269 | static struct tree_descr files[] = { | |
1270 | { "cache_threshold", | |
1271 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1272 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1273 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1274 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1275 | #endif | |
1276 | }; | |
1277 | ||
6e20a64a | 1278 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1279 | struct inode *inode; |
1280 | struct dentry *dentry; | |
1281 | ||
1282 | dentry = d_alloc_name(dir, files[i].name); | |
1283 | if (!dentry) { | |
1284 | ret = -ENOMEM; | |
d6aafa65 | 1285 | goto out; |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1289 | if (!inode) { | |
1290 | ret = -ENOMEM; | |
d6aafa65 | 1291 | goto out; |
1da177e4 LT |
1292 | } |
1293 | inode->i_fop = files[i].ops; | |
6174eafc | 1294 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1295 | d_add(dentry, inode); |
1296 | } | |
1297 | out: | |
1298 | return ret; | |
1da177e4 LT |
1299 | } |
1300 | ||
f0ee2e46 JC |
1301 | static ssize_t sel_read_initcon(struct file * file, char __user *buf, |
1302 | size_t count, loff_t *ppos) | |
1303 | { | |
1304 | struct inode *inode; | |
1305 | char *con; | |
1306 | u32 sid, len; | |
1307 | ssize_t ret; | |
1308 | ||
1309 | inode = file->f_path.dentry->d_inode; | |
1310 | sid = inode->i_ino&SEL_INO_MASK; | |
1311 | ret = security_sid_to_context(sid, &con, &len); | |
1312 | if (ret < 0) | |
1313 | return ret; | |
1314 | ||
1315 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1316 | kfree(con); | |
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | static const struct file_operations sel_initcon_ops = { | |
1321 | .read = sel_read_initcon, | |
1322 | }; | |
1323 | ||
1324 | static int sel_make_initcon_files(struct dentry *dir) | |
1325 | { | |
1326 | int i, ret = 0; | |
1327 | ||
1328 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1329 | struct inode *inode; | |
1330 | struct dentry *dentry; | |
1331 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1332 | if (!dentry) { | |
1333 | ret = -ENOMEM; | |
1334 | goto out; | |
1335 | } | |
1336 | ||
1337 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1338 | if (!inode) { | |
1339 | ret = -ENOMEM; | |
1340 | goto out; | |
1341 | } | |
1342 | inode->i_fop = &sel_initcon_ops; | |
1343 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1344 | d_add(dentry, inode); | |
1345 | } | |
1346 | out: | |
1347 | return ret; | |
1348 | } | |
1349 | ||
e47c8fc5 CP |
1350 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1351 | { | |
1352 | return a / b - (a % b < 0); | |
1353 | } | |
1354 | ||
1355 | static inline unsigned long sel_class_to_ino(u16 class) | |
1356 | { | |
1357 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1358 | } | |
1359 | ||
1360 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1361 | { | |
1362 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1363 | } | |
1364 | ||
1365 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1366 | { | |
1367 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1368 | } | |
1369 | ||
1370 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1371 | { | |
1372 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1373 | } | |
1374 | ||
1375 | static ssize_t sel_read_class(struct file * file, char __user *buf, | |
1376 | size_t count, loff_t *ppos) | |
1377 | { | |
1378 | ssize_t rc, len; | |
1379 | char *page; | |
1380 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1381 | ||
1382 | page = (char *)__get_free_page(GFP_KERNEL); | |
1383 | if (!page) { | |
1384 | rc = -ENOMEM; | |
1385 | goto out; | |
1386 | } | |
1387 | ||
1388 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1389 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1390 | free_page((unsigned long)page); | |
1391 | out: | |
1392 | return rc; | |
1393 | } | |
1394 | ||
1395 | static const struct file_operations sel_class_ops = { | |
1396 | .read = sel_read_class, | |
1397 | }; | |
1398 | ||
1399 | static ssize_t sel_read_perm(struct file * file, char __user *buf, | |
1400 | size_t count, loff_t *ppos) | |
1401 | { | |
1402 | ssize_t rc, len; | |
1403 | char *page; | |
1404 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1405 | ||
1406 | page = (char *)__get_free_page(GFP_KERNEL); | |
1407 | if (!page) { | |
1408 | rc = -ENOMEM; | |
1409 | goto out; | |
1410 | } | |
1411 | ||
1412 | len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); | |
1413 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1414 | free_page((unsigned long)page); | |
1415 | out: | |
1416 | return rc; | |
1417 | } | |
1418 | ||
1419 | static const struct file_operations sel_perm_ops = { | |
1420 | .read = sel_read_perm, | |
1421 | }; | |
1422 | ||
3bb56b25 PM |
1423 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1424 | size_t count, loff_t *ppos) | |
1425 | { | |
1426 | int value; | |
1427 | char tmpbuf[TMPBUFLEN]; | |
1428 | ssize_t length; | |
1429 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1430 | ||
1431 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1432 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1433 | ||
1434 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1435 | } | |
1436 | ||
1437 | static const struct file_operations sel_policycap_ops = { | |
1438 | .read = sel_read_policycap, | |
1439 | }; | |
1440 | ||
e47c8fc5 CP |
1441 | static int sel_make_perm_files(char *objclass, int classvalue, |
1442 | struct dentry *dir) | |
1443 | { | |
1444 | int i, rc = 0, nperms; | |
1445 | char **perms; | |
1446 | ||
1447 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1448 | if (rc) | |
1449 | goto out; | |
1450 | ||
1451 | for (i = 0; i < nperms; i++) { | |
1452 | struct inode *inode; | |
1453 | struct dentry *dentry; | |
1454 | ||
1455 | dentry = d_alloc_name(dir, perms[i]); | |
1456 | if (!dentry) { | |
1457 | rc = -ENOMEM; | |
1458 | goto out1; | |
1459 | } | |
1460 | ||
1461 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1462 | if (!inode) { | |
1463 | rc = -ENOMEM; | |
1464 | goto out1; | |
1465 | } | |
1466 | inode->i_fop = &sel_perm_ops; | |
1467 | /* i+1 since perm values are 1-indexed */ | |
1468 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1469 | d_add(dentry, inode); | |
1470 | } | |
1471 | ||
1472 | out1: | |
1473 | for (i = 0; i < nperms; i++) | |
1474 | kfree(perms[i]); | |
1475 | kfree(perms); | |
1476 | out: | |
1477 | return rc; | |
1478 | } | |
1479 | ||
1480 | static int sel_make_class_dir_entries(char *classname, int index, | |
1481 | struct dentry *dir) | |
1482 | { | |
1483 | struct dentry *dentry = NULL; | |
1484 | struct inode *inode = NULL; | |
1485 | int rc; | |
1486 | ||
1487 | dentry = d_alloc_name(dir, "index"); | |
1488 | if (!dentry) { | |
1489 | rc = -ENOMEM; | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1494 | if (!inode) { | |
1495 | rc = -ENOMEM; | |
1496 | goto out; | |
1497 | } | |
1498 | ||
1499 | inode->i_fop = &sel_class_ops; | |
1500 | inode->i_ino = sel_class_to_ino(index); | |
1501 | d_add(dentry, inode); | |
1502 | ||
1503 | dentry = d_alloc_name(dir, "perms"); | |
1504 | if (!dentry) { | |
1505 | rc = -ENOMEM; | |
1506 | goto out; | |
1507 | } | |
1508 | ||
1509 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1510 | if (rc) | |
1511 | goto out; | |
1512 | ||
1513 | rc = sel_make_perm_files(classname, index, dentry); | |
1514 | ||
1515 | out: | |
1516 | return rc; | |
1517 | } | |
1518 | ||
1519 | static void sel_remove_classes(void) | |
1520 | { | |
1521 | struct list_head *class_node; | |
1522 | ||
1523 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1524 | struct dentry *class_subdir = list_entry(class_node, | |
1525 | struct dentry, d_u.d_child); | |
1526 | struct list_head *class_subdir_node; | |
1527 | ||
1528 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1529 | struct dentry *d = list_entry(class_subdir_node, | |
1530 | struct dentry, d_u.d_child); | |
1531 | ||
1532 | if (d->d_inode) | |
1533 | if (d->d_inode->i_mode & S_IFDIR) | |
1534 | sel_remove_entries(d); | |
1535 | } | |
1536 | ||
1537 | sel_remove_entries(class_subdir); | |
1538 | } | |
1539 | ||
1540 | sel_remove_entries(class_dir); | |
1541 | } | |
1542 | ||
1543 | static int sel_make_classes(void) | |
1544 | { | |
1545 | int rc = 0, nclasses, i; | |
1546 | char **classes; | |
1547 | ||
1548 | /* delete any existing entries */ | |
1549 | sel_remove_classes(); | |
1550 | ||
1551 | rc = security_get_classes(&classes, &nclasses); | |
1552 | if (rc < 0) | |
1553 | goto out; | |
1554 | ||
1555 | /* +2 since classes are 1-indexed */ | |
1556 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1557 | ||
1558 | for (i = 0; i < nclasses; i++) { | |
1559 | struct dentry *class_name_dir; | |
1560 | ||
1561 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1562 | if (!class_name_dir) { | |
1563 | rc = -ENOMEM; | |
1564 | goto out1; | |
1565 | } | |
1566 | ||
1567 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1568 | &last_class_ino); | |
1569 | if (rc) | |
1570 | goto out1; | |
1571 | ||
1572 | /* i+1 since class values are 1-indexed */ | |
1573 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1574 | class_name_dir); | |
1575 | if (rc) | |
1576 | goto out1; | |
1577 | } | |
1578 | ||
1579 | out1: | |
1580 | for (i = 0; i < nclasses; i++) | |
1581 | kfree(classes[i]); | |
1582 | kfree(classes); | |
1583 | out: | |
1584 | return rc; | |
1585 | } | |
1586 | ||
3bb56b25 PM |
1587 | static int sel_make_policycap(void) |
1588 | { | |
1589 | unsigned int iter; | |
1590 | struct dentry *dentry = NULL; | |
1591 | struct inode *inode = NULL; | |
1592 | ||
1593 | sel_remove_entries(policycap_dir); | |
1594 | ||
1595 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1596 | if (iter < ARRAY_SIZE(policycap_names)) | |
1597 | dentry = d_alloc_name(policycap_dir, | |
1598 | policycap_names[iter]); | |
1599 | else | |
1600 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1601 | ||
1602 | if (dentry == NULL) | |
1603 | return -ENOMEM; | |
1604 | ||
1605 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1606 | if (inode == NULL) | |
1607 | return -ENOMEM; | |
1608 | ||
1609 | inode->i_fop = &sel_policycap_ops; | |
1610 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1611 | d_add(dentry, inode); | |
1612 | } | |
1613 | ||
1614 | return 0; | |
1615 | } | |
1616 | ||
0dd4ae51 CP |
1617 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1618 | unsigned long *ino) | |
1da177e4 LT |
1619 | { |
1620 | int ret = 0; | |
1621 | struct inode *inode; | |
1622 | ||
edb20fb5 | 1623 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1624 | if (!inode) { |
1625 | ret = -ENOMEM; | |
1626 | goto out; | |
1627 | } | |
1628 | inode->i_op = &simple_dir_inode_operations; | |
1629 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1630 | inode->i_ino = ++(*ino); |
40e906f8 | 1631 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1632 | inc_nlink(inode); |
1da177e4 | 1633 | d_add(dentry, inode); |
edb20fb5 | 1634 | /* bump link count on parent directory, too */ |
d8c76e6f | 1635 | inc_nlink(dir); |
1da177e4 LT |
1636 | out: |
1637 | return ret; | |
1638 | } | |
1639 | ||
1640 | static int sel_fill_super(struct super_block * sb, void * data, int silent) | |
1641 | { | |
1642 | int ret; | |
1643 | struct dentry *dentry; | |
edb20fb5 | 1644 | struct inode *inode, *root_inode; |
1da177e4 LT |
1645 | struct inode_security_struct *isec; |
1646 | ||
1647 | static struct tree_descr selinux_files[] = { | |
1648 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1649 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1650 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1651 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1652 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1653 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1654 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1655 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1656 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1657 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1658 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1659 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1660 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1661 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1662 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1663 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1664 | /* last one */ {""} |
1665 | }; | |
1666 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1667 | if (ret) | |
161ce45a | 1668 | goto err; |
1da177e4 | 1669 | |
edb20fb5 JM |
1670 | root_inode = sb->s_root->d_inode; |
1671 | ||
1da177e4 | 1672 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1673 | if (!dentry) { |
1674 | ret = -ENOMEM; | |
1675 | goto err; | |
1676 | } | |
1da177e4 | 1677 | |
0dd4ae51 | 1678 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1679 | if (ret) |
161ce45a | 1680 | goto err; |
cde174a8 | 1681 | |
1da177e4 | 1682 | bool_dir = dentry; |
1da177e4 LT |
1683 | |
1684 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1685 | if (!dentry) { |
1686 | ret = -ENOMEM; | |
1687 | goto err; | |
1688 | } | |
1da177e4 LT |
1689 | |
1690 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1691 | if (!inode) { |
1692 | ret = -ENOMEM; | |
1693 | goto err; | |
1694 | } | |
6174eafc | 1695 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1696 | isec = (struct inode_security_struct*)inode->i_security; |
1697 | isec->sid = SECINITSID_DEVNULL; | |
1698 | isec->sclass = SECCLASS_CHR_FILE; | |
1699 | isec->initialized = 1; | |
1700 | ||
1701 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1702 | d_add(dentry, inode); | |
1703 | selinux_null = dentry; | |
1704 | ||
1705 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1706 | if (!dentry) { |
1707 | ret = -ENOMEM; | |
1708 | goto err; | |
1709 | } | |
1da177e4 | 1710 | |
0dd4ae51 | 1711 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1712 | if (ret) |
161ce45a | 1713 | goto err; |
1da177e4 LT |
1714 | |
1715 | ret = sel_make_avc_files(dentry); | |
1716 | if (ret) | |
161ce45a | 1717 | goto err; |
f0ee2e46 JC |
1718 | |
1719 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1720 | if (!dentry) { | |
1721 | ret = -ENOMEM; | |
1722 | goto err; | |
1723 | } | |
1724 | ||
0dd4ae51 | 1725 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1726 | if (ret) |
1727 | goto err; | |
1728 | ||
1729 | ret = sel_make_initcon_files(dentry); | |
1730 | if (ret) | |
1731 | goto err; | |
1732 | ||
e47c8fc5 CP |
1733 | dentry = d_alloc_name(sb->s_root, "class"); |
1734 | if (!dentry) { | |
1735 | ret = -ENOMEM; | |
1736 | goto err; | |
1737 | } | |
1738 | ||
1739 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1740 | if (ret) | |
1741 | goto err; | |
1742 | ||
1743 | class_dir = dentry; | |
1744 | ||
3bb56b25 PM |
1745 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1746 | if (!dentry) { | |
1747 | ret = -ENOMEM; | |
1748 | goto err; | |
1749 | } | |
1750 | ||
1751 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1752 | if (ret) | |
1753 | goto err; | |
1754 | ||
1755 | policycap_dir = dentry; | |
1756 | ||
1da177e4 | 1757 | out: |
161ce45a JM |
1758 | return ret; |
1759 | err: | |
1da177e4 | 1760 | printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); |
161ce45a | 1761 | goto out; |
1da177e4 LT |
1762 | } |
1763 | ||
454e2398 DH |
1764 | static int sel_get_sb(struct file_system_type *fs_type, |
1765 | int flags, const char *dev_name, void *data, | |
1766 | struct vfsmount *mnt) | |
1da177e4 | 1767 | { |
454e2398 | 1768 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1769 | } |
1770 | ||
1771 | static struct file_system_type sel_fs_type = { | |
1772 | .name = "selinuxfs", | |
1773 | .get_sb = sel_get_sb, | |
1774 | .kill_sb = kill_litter_super, | |
1775 | }; | |
1776 | ||
1777 | struct vfsmount *selinuxfs_mount; | |
1778 | ||
1779 | static int __init init_sel_fs(void) | |
1780 | { | |
1781 | int err; | |
1782 | ||
1783 | if (!selinux_enabled) | |
1784 | return 0; | |
1785 | err = register_filesystem(&sel_fs_type); | |
1786 | if (!err) { | |
1787 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1788 | if (IS_ERR(selinuxfs_mount)) { | |
1789 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1790 | err = PTR_ERR(selinuxfs_mount); | |
1791 | selinuxfs_mount = NULL; | |
1792 | } | |
1793 | } | |
1794 | return err; | |
1795 | } | |
1796 | ||
1797 | __initcall(init_sel_fs); | |
1798 | ||
1799 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1800 | void exit_sel_fs(void) | |
1801 | { | |
1802 | unregister_filesystem(&sel_fs_type); | |
1803 | } | |
1804 | #endif |