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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[] = { | |
b0c636b9 EP |
45 | "network_peer_controls", |
46 | "open_perms" | |
3bb56b25 PM |
47 | }; |
48 | ||
1da177e4 LT |
49 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; |
50 | ||
4e5ab4cb JM |
51 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
52 | #define SELINUX_COMPAT_NET_VALUE 0 | |
53 | #else | |
54 | #define SELINUX_COMPAT_NET_VALUE 1 | |
55 | #endif | |
56 | ||
57 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; | |
58 | ||
1da177e4 LT |
59 | static int __init checkreqprot_setup(char *str) |
60 | { | |
61 | selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; | |
62 | return 1; | |
63 | } | |
64 | __setup("checkreqprot=", checkreqprot_setup); | |
65 | ||
4e5ab4cb JM |
66 | static int __init selinux_compat_net_setup(char *str) |
67 | { | |
68 | selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; | |
69 | return 1; | |
70 | } | |
71 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
72 | ||
1da177e4 | 73 | |
bb003079 | 74 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
75 | |
76 | /* global data for booleans */ | |
77 | static struct dentry *bool_dir = NULL; | |
78 | static int bool_num = 0; | |
d313f948 | 79 | static char **bool_pending_names; |
1da177e4 LT |
80 | static int *bool_pending_values = NULL; |
81 | ||
e47c8fc5 CP |
82 | /* global data for classes */ |
83 | static struct dentry *class_dir = NULL; | |
84 | static unsigned long last_class_ino; | |
85 | ||
3bb56b25 PM |
86 | /* global data for policy capabilities */ |
87 | static struct dentry *policycap_dir = NULL; | |
88 | ||
1da177e4 LT |
89 | extern void selnl_notify_setenforce(int val); |
90 | ||
91 | /* Check whether a task is allowed to use a security operation. */ | |
92 | static int task_has_security(struct task_struct *tsk, | |
93 | u32 perms) | |
94 | { | |
95 | struct task_security_struct *tsec; | |
96 | ||
97 | tsec = tsk->security; | |
98 | if (!tsec) | |
99 | return -EACCES; | |
100 | ||
101 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, | |
102 | SECCLASS_SECURITY, perms, NULL); | |
103 | } | |
104 | ||
105 | enum sel_inos { | |
106 | SEL_ROOT_INO = 2, | |
107 | SEL_LOAD, /* load policy */ | |
108 | SEL_ENFORCE, /* get or set enforcing status */ | |
109 | SEL_CONTEXT, /* validate context */ | |
110 | SEL_ACCESS, /* compute access decision */ | |
111 | SEL_CREATE, /* compute create labeling decision */ | |
112 | SEL_RELABEL, /* compute relabeling decision */ | |
113 | SEL_USER, /* compute reachable user contexts */ | |
114 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
115 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
116 | SEL_MLS, /* return if MLS policy is enabled */ | |
117 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
118 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
119 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 120 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
121 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
122 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 123 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
124 | }; |
125 | ||
6174eafc JC |
126 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
127 | ||
3bb56b25 PM |
128 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
129 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
130 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
131 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
132 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 133 | |
1da177e4 LT |
134 | #define TMPBUFLEN 12 |
135 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
136 | size_t count, loff_t *ppos) | |
137 | { | |
138 | char tmpbuf[TMPBUFLEN]; | |
139 | ssize_t length; | |
140 | ||
141 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
142 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
143 | } | |
144 | ||
145 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
146 | static ssize_t sel_write_enforce(struct file * file, const char __user * buf, | |
147 | size_t count, loff_t *ppos) | |
148 | ||
149 | { | |
150 | char *page; | |
151 | ssize_t length; | |
152 | int new_value; | |
153 | ||
bfd51626 | 154 | if (count >= PAGE_SIZE) |
1da177e4 LT |
155 | return -ENOMEM; |
156 | if (*ppos != 0) { | |
157 | /* No partial writes. */ | |
158 | return -EINVAL; | |
159 | } | |
160 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
161 | if (!page) | |
162 | return -ENOMEM; | |
163 | length = -EFAULT; | |
164 | if (copy_from_user(page, buf, count)) | |
165 | goto out; | |
166 | ||
167 | length = -EINVAL; | |
168 | if (sscanf(page, "%d", &new_value) != 1) | |
169 | goto out; | |
170 | ||
171 | if (new_value != selinux_enforcing) { | |
172 | length = task_has_security(current, SECURITY__SETENFORCE); | |
173 | if (length) | |
174 | goto out; | |
af601e46 | 175 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
176 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
177 | new_value, selinux_enforcing, | |
178 | audit_get_loginuid(current), | |
179 | audit_get_sessionid(current)); | |
1da177e4 LT |
180 | selinux_enforcing = new_value; |
181 | if (selinux_enforcing) | |
182 | avc_ss_reset(0); | |
183 | selnl_notify_setenforce(selinux_enforcing); | |
184 | } | |
185 | length = count; | |
186 | out: | |
187 | free_page((unsigned long) page); | |
188 | return length; | |
189 | } | |
190 | #else | |
191 | #define sel_write_enforce NULL | |
192 | #endif | |
193 | ||
9c2e08c5 | 194 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
195 | .read = sel_read_enforce, |
196 | .write = sel_write_enforce, | |
197 | }; | |
198 | ||
3f12070e EP |
199 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
200 | size_t count, loff_t *ppos) | |
201 | { | |
202 | char tmpbuf[TMPBUFLEN]; | |
203 | ssize_t length; | |
204 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
205 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
206 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
207 | ||
208 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
209 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
210 | } | |
211 | ||
212 | static const struct file_operations sel_handle_unknown_ops = { | |
213 | .read = sel_read_handle_unknown, | |
214 | }; | |
215 | ||
1da177e4 LT |
216 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
217 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, | |
218 | size_t count, loff_t *ppos) | |
219 | ||
220 | { | |
221 | char *page; | |
222 | ssize_t length; | |
223 | int new_value; | |
224 | extern int selinux_disable(void); | |
225 | ||
bfd51626 | 226 | if (count >= PAGE_SIZE) |
1da177e4 LT |
227 | return -ENOMEM; |
228 | if (*ppos != 0) { | |
229 | /* No partial writes. */ | |
230 | return -EINVAL; | |
231 | } | |
232 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
233 | if (!page) | |
234 | return -ENOMEM; | |
235 | length = -EFAULT; | |
236 | if (copy_from_user(page, buf, count)) | |
237 | goto out; | |
238 | ||
239 | length = -EINVAL; | |
240 | if (sscanf(page, "%d", &new_value) != 1) | |
241 | goto out; | |
242 | ||
243 | if (new_value) { | |
244 | length = selinux_disable(); | |
245 | if (length < 0) | |
246 | goto out; | |
af601e46 | 247 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
248 | "selinux=0 auid=%u ses=%u", |
249 | audit_get_loginuid(current), | |
250 | audit_get_sessionid(current)); | |
1da177e4 LT |
251 | } |
252 | ||
253 | length = count; | |
254 | out: | |
255 | free_page((unsigned long) page); | |
256 | return length; | |
257 | } | |
258 | #else | |
259 | #define sel_write_disable NULL | |
260 | #endif | |
261 | ||
9c2e08c5 | 262 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
263 | .write = sel_write_disable, |
264 | }; | |
265 | ||
266 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
267 | size_t count, loff_t *ppos) | |
268 | { | |
269 | char tmpbuf[TMPBUFLEN]; | |
270 | ssize_t length; | |
271 | ||
272 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
273 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
274 | } | |
275 | ||
9c2e08c5 | 276 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
277 | .read = sel_read_policyvers, |
278 | }; | |
279 | ||
280 | /* declaration for sel_write_load */ | |
281 | static int sel_make_bools(void); | |
e47c8fc5 | 282 | static int sel_make_classes(void); |
3bb56b25 | 283 | static int sel_make_policycap(void); |
e47c8fc5 CP |
284 | |
285 | /* declaration for sel_make_class_dirs */ | |
286 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
287 | unsigned long *ino); | |
1da177e4 LT |
288 | |
289 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
290 | size_t count, loff_t *ppos) | |
291 | { | |
292 | char tmpbuf[TMPBUFLEN]; | |
293 | ssize_t length; | |
294 | ||
295 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
296 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
297 | } | |
298 | ||
9c2e08c5 | 299 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
300 | .read = sel_read_mls, |
301 | }; | |
302 | ||
303 | static ssize_t sel_write_load(struct file * file, const char __user * buf, | |
304 | size_t count, loff_t *ppos) | |
305 | ||
306 | { | |
307 | int ret; | |
308 | ssize_t length; | |
309 | void *data = NULL; | |
310 | ||
bb003079 | 311 | mutex_lock(&sel_mutex); |
1da177e4 LT |
312 | |
313 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
314 | if (length) | |
315 | goto out; | |
316 | ||
317 | if (*ppos != 0) { | |
318 | /* No partial writes. */ | |
319 | length = -EINVAL; | |
320 | goto out; | |
321 | } | |
322 | ||
bfd51626 | 323 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
324 | || (data = vmalloc(count)) == NULL) { |
325 | length = -ENOMEM; | |
326 | goto out; | |
327 | } | |
328 | ||
329 | length = -EFAULT; | |
330 | if (copy_from_user(data, buf, count) != 0) | |
331 | goto out; | |
332 | ||
333 | length = security_load_policy(data, count); | |
334 | if (length) | |
335 | goto out; | |
336 | ||
337 | ret = sel_make_bools(); | |
e47c8fc5 CP |
338 | if (ret) { |
339 | length = ret; | |
340 | goto out1; | |
341 | } | |
342 | ||
343 | ret = sel_make_classes(); | |
3bb56b25 PM |
344 | if (ret) { |
345 | length = ret; | |
346 | goto out1; | |
347 | } | |
348 | ||
349 | ret = sel_make_policycap(); | |
1da177e4 LT |
350 | if (ret) |
351 | length = ret; | |
352 | else | |
353 | length = count; | |
e47c8fc5 CP |
354 | |
355 | out1: | |
3f12070e EP |
356 | |
357 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", | |
358 | (security_get_reject_unknown() ? "reject" : | |
359 | (security_get_allow_unknown() ? "allow" : "deny"))); | |
360 | ||
af601e46 | 361 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
362 | "policy loaded auid=%u ses=%u", |
363 | audit_get_loginuid(current), | |
364 | audit_get_sessionid(current)); | |
1da177e4 | 365 | out: |
bb003079 | 366 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
367 | vfree(data); |
368 | return length; | |
369 | } | |
370 | ||
9c2e08c5 | 371 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
372 | .write = sel_write_load, |
373 | }; | |
374 | ||
ce9982d0 | 375 | static ssize_t sel_write_context(struct file * file, char *buf, size_t size) |
1da177e4 | 376 | { |
ce9982d0 SS |
377 | char *canon; |
378 | u32 sid, len; | |
1da177e4 LT |
379 | ssize_t length; |
380 | ||
381 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
382 | if (length) | |
383 | return length; | |
384 | ||
ce9982d0 SS |
385 | length = security_context_to_sid(buf, size, &sid); |
386 | if (length < 0) | |
387 | return length; | |
1da177e4 | 388 | |
ce9982d0 | 389 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 390 | if (length < 0) |
ce9982d0 SS |
391 | return length; |
392 | ||
393 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
394 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
395 | "payload max\n", __func__, len); | |
ce9982d0 | 396 | length = -ERANGE; |
1da177e4 | 397 | goto out; |
ce9982d0 | 398 | } |
1da177e4 | 399 | |
ce9982d0 SS |
400 | memcpy(buf, canon, len); |
401 | length = len; | |
1da177e4 | 402 | out: |
ce9982d0 | 403 | kfree(canon); |
1da177e4 LT |
404 | return length; |
405 | } | |
406 | ||
1da177e4 LT |
407 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
408 | size_t count, loff_t *ppos) | |
409 | { | |
410 | char tmpbuf[TMPBUFLEN]; | |
411 | ssize_t length; | |
412 | ||
413 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
414 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
415 | } | |
416 | ||
417 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, | |
418 | size_t count, loff_t *ppos) | |
419 | { | |
420 | char *page; | |
421 | ssize_t length; | |
422 | unsigned int new_value; | |
423 | ||
424 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
425 | if (length) | |
426 | return length; | |
427 | ||
bfd51626 | 428 | if (count >= PAGE_SIZE) |
1da177e4 LT |
429 | return -ENOMEM; |
430 | if (*ppos != 0) { | |
431 | /* No partial writes. */ | |
432 | return -EINVAL; | |
433 | } | |
434 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
435 | if (!page) | |
436 | return -ENOMEM; | |
437 | length = -EFAULT; | |
438 | if (copy_from_user(page, buf, count)) | |
439 | goto out; | |
440 | ||
441 | length = -EINVAL; | |
442 | if (sscanf(page, "%u", &new_value) != 1) | |
443 | goto out; | |
444 | ||
445 | selinux_checkreqprot = new_value ? 1 : 0; | |
446 | length = count; | |
447 | out: | |
448 | free_page((unsigned long) page); | |
449 | return length; | |
450 | } | |
9c2e08c5 | 451 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
452 | .read = sel_read_checkreqprot, |
453 | .write = sel_write_checkreqprot, | |
454 | }; | |
455 | ||
4e5ab4cb JM |
456 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
457 | size_t count, loff_t *ppos) | |
458 | { | |
459 | char tmpbuf[TMPBUFLEN]; | |
460 | ssize_t length; | |
461 | ||
462 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
463 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
464 | } | |
465 | ||
466 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, | |
467 | size_t count, loff_t *ppos) | |
468 | { | |
469 | char *page; | |
470 | ssize_t length; | |
471 | int new_value; | |
472 | ||
473 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
474 | if (length) | |
475 | return length; | |
476 | ||
477 | if (count >= PAGE_SIZE) | |
478 | return -ENOMEM; | |
479 | if (*ppos != 0) { | |
480 | /* No partial writes. */ | |
481 | return -EINVAL; | |
482 | } | |
483 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
484 | if (!page) | |
485 | return -ENOMEM; | |
486 | length = -EFAULT; | |
487 | if (copy_from_user(page, buf, count)) | |
488 | goto out; | |
489 | ||
490 | length = -EINVAL; | |
491 | if (sscanf(page, "%d", &new_value) != 1) | |
492 | goto out; | |
493 | ||
494 | selinux_compat_net = new_value ? 1 : 0; | |
495 | length = count; | |
496 | out: | |
497 | free_page((unsigned long) page); | |
498 | return length; | |
499 | } | |
9c2e08c5 | 500 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
501 | .read = sel_read_compat_net, |
502 | .write = sel_write_compat_net, | |
503 | }; | |
504 | ||
1da177e4 LT |
505 | /* |
506 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
507 | */ | |
508 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); | |
509 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); | |
510 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); | |
511 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); | |
512 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); | |
513 | ||
514 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
515 | [SEL_ACCESS] = sel_write_access, | |
516 | [SEL_CREATE] = sel_write_create, | |
517 | [SEL_RELABEL] = sel_write_relabel, | |
518 | [SEL_USER] = sel_write_user, | |
519 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 520 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
521 | }; |
522 | ||
523 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
524 | { | |
3d5ff529 | 525 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
526 | char *data; |
527 | ssize_t rv; | |
528 | ||
6e20a64a | 529 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
530 | return -EINVAL; |
531 | ||
532 | data = simple_transaction_get(file, buf, size); | |
533 | if (IS_ERR(data)) | |
534 | return PTR_ERR(data); | |
535 | ||
536 | rv = write_op[ino](file, data, size); | |
537 | if (rv>0) { | |
538 | simple_transaction_set(file, rv); | |
539 | rv = size; | |
540 | } | |
541 | return rv; | |
542 | } | |
543 | ||
9c2e08c5 | 544 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
545 | .write = selinux_transaction_write, |
546 | .read = simple_transaction_read, | |
547 | .release = simple_transaction_release, | |
548 | }; | |
549 | ||
550 | /* | |
551 | * payload - write methods | |
552 | * If the method has a response, the response should be put in buf, | |
553 | * and the length returned. Otherwise return 0 or and -error. | |
554 | */ | |
555 | ||
556 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) | |
557 | { | |
558 | char *scon, *tcon; | |
559 | u32 ssid, tsid; | |
560 | u16 tclass; | |
561 | u32 req; | |
562 | struct av_decision avd; | |
563 | ssize_t length; | |
564 | ||
565 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
566 | if (length) | |
567 | return length; | |
568 | ||
569 | length = -ENOMEM; | |
89d155ef | 570 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
571 | if (!scon) |
572 | return length; | |
1da177e4 | 573 | |
89d155ef | 574 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
575 | if (!tcon) |
576 | goto out; | |
1da177e4 LT |
577 | |
578 | length = -EINVAL; | |
579 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
580 | goto out2; | |
581 | ||
582 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
583 | if (length < 0) | |
584 | goto out2; | |
585 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
586 | if (length < 0) | |
587 | goto out2; | |
588 | ||
589 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
590 | if (length < 0) | |
591 | goto out2; | |
592 | ||
593 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
594 | "%x %x %x %x %u", | |
595 | avd.allowed, avd.decided, | |
596 | avd.auditallow, avd.auditdeny, | |
597 | avd.seqno); | |
598 | out2: | |
599 | kfree(tcon); | |
600 | out: | |
601 | kfree(scon); | |
602 | return length; | |
603 | } | |
604 | ||
605 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) | |
606 | { | |
607 | char *scon, *tcon; | |
608 | u32 ssid, tsid, newsid; | |
609 | u16 tclass; | |
610 | ssize_t length; | |
611 | char *newcon; | |
612 | u32 len; | |
613 | ||
614 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
615 | if (length) | |
616 | return length; | |
617 | ||
618 | length = -ENOMEM; | |
89d155ef | 619 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
620 | if (!scon) |
621 | return length; | |
1da177e4 | 622 | |
89d155ef | 623 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
624 | if (!tcon) |
625 | goto out; | |
1da177e4 LT |
626 | |
627 | length = -EINVAL; | |
628 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
629 | goto out2; | |
630 | ||
631 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
632 | if (length < 0) | |
633 | goto out2; | |
634 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
635 | if (length < 0) | |
636 | goto out2; | |
637 | ||
638 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
639 | if (length < 0) | |
640 | goto out2; | |
641 | ||
642 | length = security_sid_to_context(newsid, &newcon, &len); | |
643 | if (length < 0) | |
644 | goto out2; | |
645 | ||
646 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
647 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
648 | "payload max\n", __func__, len); | |
1da177e4 LT |
649 | length = -ERANGE; |
650 | goto out3; | |
651 | } | |
652 | ||
653 | memcpy(buf, newcon, len); | |
654 | length = len; | |
655 | out3: | |
656 | kfree(newcon); | |
657 | out2: | |
658 | kfree(tcon); | |
659 | out: | |
660 | kfree(scon); | |
661 | return length; | |
662 | } | |
663 | ||
664 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) | |
665 | { | |
666 | char *scon, *tcon; | |
667 | u32 ssid, tsid, newsid; | |
668 | u16 tclass; | |
669 | ssize_t length; | |
670 | char *newcon; | |
671 | u32 len; | |
672 | ||
673 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
674 | if (length) | |
675 | return length; | |
676 | ||
677 | length = -ENOMEM; | |
89d155ef | 678 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
679 | if (!scon) |
680 | return length; | |
1da177e4 | 681 | |
89d155ef | 682 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
683 | if (!tcon) |
684 | goto out; | |
1da177e4 LT |
685 | |
686 | length = -EINVAL; | |
687 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
688 | goto out2; | |
689 | ||
690 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
691 | if (length < 0) | |
692 | goto out2; | |
693 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
694 | if (length < 0) | |
695 | goto out2; | |
696 | ||
697 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
698 | if (length < 0) | |
699 | goto out2; | |
700 | ||
701 | length = security_sid_to_context(newsid, &newcon, &len); | |
702 | if (length < 0) | |
703 | goto out2; | |
704 | ||
705 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
706 | length = -ERANGE; | |
707 | goto out3; | |
708 | } | |
709 | ||
710 | memcpy(buf, newcon, len); | |
711 | length = len; | |
712 | out3: | |
713 | kfree(newcon); | |
714 | out2: | |
715 | kfree(tcon); | |
716 | out: | |
717 | kfree(scon); | |
718 | return length; | |
719 | } | |
720 | ||
721 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) | |
722 | { | |
723 | char *con, *user, *ptr; | |
724 | u32 sid, *sids; | |
725 | ssize_t length; | |
726 | char *newcon; | |
727 | int i, rc; | |
728 | u32 len, nsids; | |
729 | ||
730 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
731 | if (length) | |
732 | return length; | |
733 | ||
734 | length = -ENOMEM; | |
89d155ef | 735 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
736 | if (!con) |
737 | return length; | |
1da177e4 | 738 | |
89d155ef | 739 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
740 | if (!user) |
741 | goto out; | |
1da177e4 LT |
742 | |
743 | length = -EINVAL; | |
744 | if (sscanf(buf, "%s %s", con, user) != 2) | |
745 | goto out2; | |
746 | ||
747 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
748 | if (length < 0) | |
749 | goto out2; | |
750 | ||
751 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
752 | if (length < 0) | |
753 | goto out2; | |
754 | ||
755 | length = sprintf(buf, "%u", nsids) + 1; | |
756 | ptr = buf + length; | |
757 | for (i = 0; i < nsids; i++) { | |
758 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
759 | if (rc) { | |
760 | length = rc; | |
761 | goto out3; | |
762 | } | |
763 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
764 | kfree(newcon); | |
765 | length = -ERANGE; | |
766 | goto out3; | |
767 | } | |
768 | memcpy(ptr, newcon, len); | |
769 | kfree(newcon); | |
770 | ptr += len; | |
771 | length += len; | |
772 | } | |
773 | out3: | |
774 | kfree(sids); | |
775 | out2: | |
776 | kfree(user); | |
777 | out: | |
778 | kfree(con); | |
779 | return length; | |
780 | } | |
781 | ||
782 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) | |
783 | { | |
784 | char *scon, *tcon; | |
785 | u32 ssid, tsid, newsid; | |
786 | u16 tclass; | |
787 | ssize_t length; | |
788 | char *newcon; | |
789 | u32 len; | |
790 | ||
791 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
792 | if (length) | |
793 | return length; | |
794 | ||
795 | length = -ENOMEM; | |
89d155ef | 796 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
797 | if (!scon) |
798 | return length; | |
1da177e4 | 799 | |
89d155ef | 800 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
801 | if (!tcon) |
802 | goto out; | |
1da177e4 LT |
803 | |
804 | length = -EINVAL; | |
805 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
806 | goto out2; | |
807 | ||
808 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
809 | if (length < 0) | |
810 | goto out2; | |
811 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
812 | if (length < 0) | |
813 | goto out2; | |
814 | ||
815 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
816 | if (length < 0) | |
817 | goto out2; | |
818 | ||
819 | length = security_sid_to_context(newsid, &newcon, &len); | |
820 | if (length < 0) | |
821 | goto out2; | |
822 | ||
823 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
824 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
825 | "payload max\n", __func__, len); | |
1da177e4 LT |
826 | length = -ERANGE; |
827 | goto out3; | |
828 | } | |
829 | ||
830 | memcpy(buf, newcon, len); | |
831 | length = len; | |
832 | out3: | |
833 | kfree(newcon); | |
834 | out2: | |
835 | kfree(tcon); | |
836 | out: | |
837 | kfree(scon); | |
838 | return length; | |
839 | } | |
840 | ||
841 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
842 | { | |
843 | struct inode *ret = new_inode(sb); | |
844 | ||
845 | if (ret) { | |
846 | ret->i_mode = mode; | |
847 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
848 | ret->i_blocks = 0; |
849 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
850 | } | |
851 | return ret; | |
852 | } | |
853 | ||
1da177e4 LT |
854 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
855 | size_t count, loff_t *ppos) | |
856 | { | |
857 | char *page = NULL; | |
858 | ssize_t length; | |
1da177e4 LT |
859 | ssize_t ret; |
860 | int cur_enforcing; | |
d313f948 SS |
861 | struct inode *inode = filep->f_path.dentry->d_inode; |
862 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
863 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 864 | |
bb003079 | 865 | mutex_lock(&sel_mutex); |
1da177e4 | 866 | |
d313f948 SS |
867 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
868 | ret = -EINVAL; | |
869 | goto out; | |
870 | } | |
1da177e4 | 871 | |
bfd51626 | 872 | if (count > PAGE_SIZE) { |
1da177e4 LT |
873 | ret = -EINVAL; |
874 | goto out; | |
875 | } | |
876 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { | |
877 | ret = -ENOMEM; | |
878 | goto out; | |
879 | } | |
880 | ||
d313f948 | 881 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
882 | if (cur_enforcing < 0) { |
883 | ret = cur_enforcing; | |
884 | goto out; | |
885 | } | |
1da177e4 | 886 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 887 | bool_pending_values[index]); |
68bdcf28 | 888 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 889 | out: |
bb003079 | 890 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
891 | if (page) |
892 | free_page((unsigned long)page); | |
893 | return ret; | |
894 | } | |
895 | ||
896 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
897 | size_t count, loff_t *ppos) | |
898 | { | |
899 | char *page = NULL; | |
d313f948 | 900 | ssize_t length; |
1da177e4 | 901 | int new_value; |
d313f948 SS |
902 | struct inode *inode = filep->f_path.dentry->d_inode; |
903 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
904 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 905 | |
bb003079 | 906 | mutex_lock(&sel_mutex); |
1da177e4 LT |
907 | |
908 | length = task_has_security(current, SECURITY__SETBOOL); | |
909 | if (length) | |
910 | goto out; | |
911 | ||
d313f948 SS |
912 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
913 | length = -EINVAL; | |
914 | goto out; | |
915 | } | |
916 | ||
bfd51626 | 917 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
918 | length = -ENOMEM; |
919 | goto out; | |
920 | } | |
d313f948 | 921 | |
1da177e4 LT |
922 | if (*ppos != 0) { |
923 | /* No partial writes. */ | |
d313f948 | 924 | length = -EINVAL; |
1da177e4 LT |
925 | goto out; |
926 | } | |
927 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
928 | if (!page) { | |
929 | length = -ENOMEM; | |
930 | goto out; | |
931 | } | |
932 | ||
d313f948 | 933 | length = -EFAULT; |
1da177e4 LT |
934 | if (copy_from_user(page, buf, count)) |
935 | goto out; | |
936 | ||
937 | length = -EINVAL; | |
938 | if (sscanf(page, "%d", &new_value) != 1) | |
939 | goto out; | |
940 | ||
941 | if (new_value) | |
942 | new_value = 1; | |
943 | ||
d313f948 | 944 | bool_pending_values[index] = new_value; |
1da177e4 LT |
945 | length = count; |
946 | ||
947 | out: | |
bb003079 | 948 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
949 | if (page) |
950 | free_page((unsigned long) page); | |
951 | return length; | |
952 | } | |
953 | ||
9c2e08c5 | 954 | static const struct file_operations sel_bool_ops = { |
1da177e4 LT |
955 | .read = sel_read_bool, |
956 | .write = sel_write_bool, | |
957 | }; | |
958 | ||
959 | static ssize_t sel_commit_bools_write(struct file *filep, | |
960 | const char __user *buf, | |
961 | size_t count, loff_t *ppos) | |
962 | { | |
963 | char *page = NULL; | |
d313f948 | 964 | ssize_t length; |
1da177e4 LT |
965 | int new_value; |
966 | ||
bb003079 | 967 | mutex_lock(&sel_mutex); |
1da177e4 LT |
968 | |
969 | length = task_has_security(current, SECURITY__SETBOOL); | |
970 | if (length) | |
971 | goto out; | |
972 | ||
bfd51626 | 973 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
974 | length = -ENOMEM; |
975 | goto out; | |
976 | } | |
977 | if (*ppos != 0) { | |
978 | /* No partial writes. */ | |
979 | goto out; | |
980 | } | |
981 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
982 | if (!page) { | |
983 | length = -ENOMEM; | |
984 | goto out; | |
985 | } | |
986 | ||
d313f948 | 987 | length = -EFAULT; |
1da177e4 LT |
988 | if (copy_from_user(page, buf, count)) |
989 | goto out; | |
990 | ||
991 | length = -EINVAL; | |
992 | if (sscanf(page, "%d", &new_value) != 1) | |
993 | goto out; | |
994 | ||
20c19e41 | 995 | if (new_value && bool_pending_values) { |
1da177e4 LT |
996 | security_set_bools(bool_num, bool_pending_values); |
997 | } | |
998 | ||
999 | length = count; | |
1000 | ||
1001 | out: | |
bb003079 | 1002 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
1003 | if (page) |
1004 | free_page((unsigned long) page); | |
1005 | return length; | |
1006 | } | |
1007 | ||
9c2e08c5 | 1008 | static const struct file_operations sel_commit_bools_ops = { |
1da177e4 LT |
1009 | .write = sel_commit_bools_write, |
1010 | }; | |
1011 | ||
0c92d7c7 | 1012 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1013 | { |
0955dc03 | 1014 | struct list_head *node; |
1da177e4 LT |
1015 | |
1016 | spin_lock(&dcache_lock); | |
1017 | node = de->d_subdirs.next; | |
1018 | while (node != &de->d_subdirs) { | |
5160ee6f | 1019 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
1020 | list_del_init(node); |
1021 | ||
1022 | if (d->d_inode) { | |
1023 | d = dget_locked(d); | |
1024 | spin_unlock(&dcache_lock); | |
1025 | d_delete(d); | |
1026 | simple_unlink(de->d_inode, d); | |
1027 | dput(d); | |
1028 | spin_lock(&dcache_lock); | |
1029 | } | |
1030 | node = de->d_subdirs.next; | |
1031 | } | |
1032 | ||
1033 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | #define BOOL_DIR_NAME "booleans" | |
1037 | ||
1038 | static int sel_make_bools(void) | |
1039 | { | |
1040 | int i, ret = 0; | |
1041 | ssize_t len; | |
1042 | struct dentry *dentry = NULL; | |
1043 | struct dentry *dir = bool_dir; | |
1044 | struct inode *inode = NULL; | |
1045 | struct inode_security_struct *isec; | |
1046 | char **names = NULL, *page; | |
1047 | int num; | |
1048 | int *values = NULL; | |
1049 | u32 sid; | |
1050 | ||
1051 | /* remove any existing files */ | |
d313f948 | 1052 | kfree(bool_pending_names); |
9a5f04bf | 1053 | kfree(bool_pending_values); |
d313f948 | 1054 | bool_pending_names = NULL; |
20c19e41 | 1055 | bool_pending_values = NULL; |
1da177e4 | 1056 | |
0c92d7c7 | 1057 | sel_remove_entries(dir); |
1da177e4 LT |
1058 | |
1059 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) | |
1060 | return -ENOMEM; | |
1061 | ||
1062 | ret = security_get_bools(&num, &names, &values); | |
1063 | if (ret != 0) | |
1064 | goto out; | |
1065 | ||
1066 | for (i = 0; i < num; i++) { | |
1067 | dentry = d_alloc_name(dir, names[i]); | |
1068 | if (!dentry) { | |
1069 | ret = -ENOMEM; | |
1070 | goto err; | |
1071 | } | |
1072 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1073 | if (!inode) { | |
1074 | ret = -ENOMEM; | |
1075 | goto err; | |
1076 | } | |
1077 | ||
1078 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1079 | if (len < 0) { | |
1080 | ret = -EINVAL; | |
1081 | goto err; | |
1082 | } else if (len >= PAGE_SIZE) { | |
1083 | ret = -ENAMETOOLONG; | |
1084 | goto err; | |
1085 | } | |
1086 | isec = (struct inode_security_struct*)inode->i_security; | |
1087 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) | |
1088 | goto err; | |
1089 | isec->sid = sid; | |
1090 | isec->initialized = 1; | |
1091 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1092 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1093 | d_add(dentry, inode); |
1094 | } | |
1095 | bool_num = num; | |
d313f948 | 1096 | bool_pending_names = names; |
1da177e4 LT |
1097 | bool_pending_values = values; |
1098 | out: | |
1099 | free_page((unsigned long)page); | |
d313f948 SS |
1100 | return ret; |
1101 | err: | |
1da177e4 | 1102 | if (names) { |
9a5f04bf JJ |
1103 | for (i = 0; i < num; i++) |
1104 | kfree(names[i]); | |
1da177e4 LT |
1105 | kfree(names); |
1106 | } | |
20c19e41 | 1107 | kfree(values); |
0c92d7c7 | 1108 | sel_remove_entries(dir); |
1da177e4 LT |
1109 | ret = -ENOMEM; |
1110 | goto out; | |
1111 | } | |
1112 | ||
1113 | #define NULL_FILE_NAME "null" | |
1114 | ||
1115 | struct dentry *selinux_null = NULL; | |
1116 | ||
1117 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1118 | size_t count, loff_t *ppos) | |
1119 | { | |
1120 | char tmpbuf[TMPBUFLEN]; | |
1121 | ssize_t length; | |
1122 | ||
1123 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1124 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1125 | } | |
1126 | ||
1127 | static ssize_t sel_write_avc_cache_threshold(struct file * file, | |
1128 | const char __user * buf, | |
1129 | size_t count, loff_t *ppos) | |
1130 | ||
1131 | { | |
1132 | char *page; | |
1133 | ssize_t ret; | |
1134 | int new_value; | |
1135 | ||
bfd51626 | 1136 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1137 | ret = -ENOMEM; |
1138 | goto out; | |
1139 | } | |
1140 | ||
1141 | if (*ppos != 0) { | |
1142 | /* No partial writes. */ | |
1143 | ret = -EINVAL; | |
1144 | goto out; | |
1145 | } | |
1146 | ||
1147 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
1148 | if (!page) { | |
1149 | ret = -ENOMEM; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
1153 | if (copy_from_user(page, buf, count)) { | |
1154 | ret = -EFAULT; | |
1155 | goto out_free; | |
1156 | } | |
1157 | ||
1158 | if (sscanf(page, "%u", &new_value) != 1) { | |
1159 | ret = -EINVAL; | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | if (new_value != avc_cache_threshold) { | |
1164 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1165 | if (ret) | |
1166 | goto out_free; | |
1167 | avc_cache_threshold = new_value; | |
1168 | } | |
1169 | ret = count; | |
1170 | out_free: | |
1171 | free_page((unsigned long)page); | |
1172 | out: | |
1173 | return ret; | |
1174 | } | |
1175 | ||
1176 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1177 | size_t count, loff_t *ppos) | |
1178 | { | |
1179 | char *page; | |
1180 | ssize_t ret = 0; | |
1181 | ||
1182 | page = (char *)__get_free_page(GFP_KERNEL); | |
1183 | if (!page) { | |
1184 | ret = -ENOMEM; | |
1185 | goto out; | |
1186 | } | |
1187 | ret = avc_get_hash_stats(page); | |
1188 | if (ret >= 0) | |
1189 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1190 | free_page((unsigned long)page); | |
1191 | out: | |
1192 | return ret; | |
1193 | } | |
1194 | ||
9c2e08c5 | 1195 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1196 | .read = sel_read_avc_cache_threshold, |
1197 | .write = sel_write_avc_cache_threshold, | |
1198 | }; | |
1199 | ||
9c2e08c5 | 1200 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1201 | .read = sel_read_avc_hash_stats, |
1202 | }; | |
1203 | ||
1204 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1205 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1206 | { | |
1207 | int cpu; | |
1208 | ||
1209 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1210 | if (!cpu_possible(cpu)) | |
1211 | continue; | |
1212 | *idx = cpu + 1; | |
1213 | return &per_cpu(avc_cache_stats, cpu); | |
1214 | } | |
1215 | return NULL; | |
1216 | } | |
1217 | ||
1218 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1219 | { | |
1220 | loff_t n = *pos - 1; | |
1221 | ||
1222 | if (*pos == 0) | |
1223 | return SEQ_START_TOKEN; | |
1224 | ||
1225 | return sel_avc_get_stat_idx(&n); | |
1226 | } | |
1227 | ||
1228 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1229 | { | |
1230 | return sel_avc_get_stat_idx(pos); | |
1231 | } | |
1232 | ||
1233 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1234 | { | |
1235 | struct avc_cache_stats *st = v; | |
1236 | ||
1237 | if (v == SEQ_START_TOKEN) | |
1238 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1239 | "frees\n"); | |
1240 | else | |
1241 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1242 | st->hits, st->misses, st->allocations, | |
1243 | st->reclaims, st->frees); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1248 | { } | |
1249 | ||
1996a109 | 1250 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1251 | .start = sel_avc_stats_seq_start, |
1252 | .next = sel_avc_stats_seq_next, | |
1253 | .show = sel_avc_stats_seq_show, | |
1254 | .stop = sel_avc_stats_seq_stop, | |
1255 | }; | |
1256 | ||
1257 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1258 | { | |
1259 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1260 | } | |
1261 | ||
9c2e08c5 | 1262 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1263 | .open = sel_open_avc_cache_stats, |
1264 | .read = seq_read, | |
1265 | .llseek = seq_lseek, | |
1266 | .release = seq_release, | |
1267 | }; | |
1268 | #endif | |
1269 | ||
1270 | static int sel_make_avc_files(struct dentry *dir) | |
1271 | { | |
1272 | int i, ret = 0; | |
1273 | static struct tree_descr files[] = { | |
1274 | { "cache_threshold", | |
1275 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1276 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1277 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1278 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1279 | #endif | |
1280 | }; | |
1281 | ||
6e20a64a | 1282 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1283 | struct inode *inode; |
1284 | struct dentry *dentry; | |
1285 | ||
1286 | dentry = d_alloc_name(dir, files[i].name); | |
1287 | if (!dentry) { | |
1288 | ret = -ENOMEM; | |
d6aafa65 | 1289 | goto out; |
1da177e4 LT |
1290 | } |
1291 | ||
1292 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1293 | if (!inode) { | |
1294 | ret = -ENOMEM; | |
d6aafa65 | 1295 | goto out; |
1da177e4 LT |
1296 | } |
1297 | inode->i_fop = files[i].ops; | |
6174eafc | 1298 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1299 | d_add(dentry, inode); |
1300 | } | |
1301 | out: | |
1302 | return ret; | |
1da177e4 LT |
1303 | } |
1304 | ||
f0ee2e46 JC |
1305 | static ssize_t sel_read_initcon(struct file * file, char __user *buf, |
1306 | size_t count, loff_t *ppos) | |
1307 | { | |
1308 | struct inode *inode; | |
1309 | char *con; | |
1310 | u32 sid, len; | |
1311 | ssize_t ret; | |
1312 | ||
1313 | inode = file->f_path.dentry->d_inode; | |
1314 | sid = inode->i_ino&SEL_INO_MASK; | |
1315 | ret = security_sid_to_context(sid, &con, &len); | |
1316 | if (ret < 0) | |
1317 | return ret; | |
1318 | ||
1319 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1320 | kfree(con); | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | static const struct file_operations sel_initcon_ops = { | |
1325 | .read = sel_read_initcon, | |
1326 | }; | |
1327 | ||
1328 | static int sel_make_initcon_files(struct dentry *dir) | |
1329 | { | |
1330 | int i, ret = 0; | |
1331 | ||
1332 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1333 | struct inode *inode; | |
1334 | struct dentry *dentry; | |
1335 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1336 | if (!dentry) { | |
1337 | ret = -ENOMEM; | |
1338 | goto out; | |
1339 | } | |
1340 | ||
1341 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1342 | if (!inode) { | |
1343 | ret = -ENOMEM; | |
1344 | goto out; | |
1345 | } | |
1346 | inode->i_fop = &sel_initcon_ops; | |
1347 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1348 | d_add(dentry, inode); | |
1349 | } | |
1350 | out: | |
1351 | return ret; | |
1352 | } | |
1353 | ||
e47c8fc5 CP |
1354 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1355 | { | |
1356 | return a / b - (a % b < 0); | |
1357 | } | |
1358 | ||
1359 | static inline unsigned long sel_class_to_ino(u16 class) | |
1360 | { | |
1361 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1362 | } | |
1363 | ||
1364 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1365 | { | |
1366 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1367 | } | |
1368 | ||
1369 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1370 | { | |
1371 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1372 | } | |
1373 | ||
1374 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1375 | { | |
1376 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1377 | } | |
1378 | ||
1379 | static ssize_t sel_read_class(struct file * file, char __user *buf, | |
1380 | size_t count, loff_t *ppos) | |
1381 | { | |
1382 | ssize_t rc, len; | |
1383 | char *page; | |
1384 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1385 | ||
1386 | page = (char *)__get_free_page(GFP_KERNEL); | |
1387 | if (!page) { | |
1388 | rc = -ENOMEM; | |
1389 | goto out; | |
1390 | } | |
1391 | ||
1392 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1393 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1394 | free_page((unsigned long)page); | |
1395 | out: | |
1396 | return rc; | |
1397 | } | |
1398 | ||
1399 | static const struct file_operations sel_class_ops = { | |
1400 | .read = sel_read_class, | |
1401 | }; | |
1402 | ||
1403 | static ssize_t sel_read_perm(struct file * file, char __user *buf, | |
1404 | size_t count, loff_t *ppos) | |
1405 | { | |
1406 | ssize_t rc, len; | |
1407 | char *page; | |
1408 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1409 | ||
1410 | page = (char *)__get_free_page(GFP_KERNEL); | |
1411 | if (!page) { | |
1412 | rc = -ENOMEM; | |
1413 | goto out; | |
1414 | } | |
1415 | ||
1416 | len = snprintf(page, PAGE_SIZE,"%d", sel_ino_to_perm(ino)); | |
1417 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1418 | free_page((unsigned long)page); | |
1419 | out: | |
1420 | return rc; | |
1421 | } | |
1422 | ||
1423 | static const struct file_operations sel_perm_ops = { | |
1424 | .read = sel_read_perm, | |
1425 | }; | |
1426 | ||
3bb56b25 PM |
1427 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1428 | size_t count, loff_t *ppos) | |
1429 | { | |
1430 | int value; | |
1431 | char tmpbuf[TMPBUFLEN]; | |
1432 | ssize_t length; | |
1433 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1434 | ||
1435 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1436 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1437 | ||
1438 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1439 | } | |
1440 | ||
1441 | static const struct file_operations sel_policycap_ops = { | |
1442 | .read = sel_read_policycap, | |
1443 | }; | |
1444 | ||
e47c8fc5 CP |
1445 | static int sel_make_perm_files(char *objclass, int classvalue, |
1446 | struct dentry *dir) | |
1447 | { | |
1448 | int i, rc = 0, nperms; | |
1449 | char **perms; | |
1450 | ||
1451 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1452 | if (rc) | |
1453 | goto out; | |
1454 | ||
1455 | for (i = 0; i < nperms; i++) { | |
1456 | struct inode *inode; | |
1457 | struct dentry *dentry; | |
1458 | ||
1459 | dentry = d_alloc_name(dir, perms[i]); | |
1460 | if (!dentry) { | |
1461 | rc = -ENOMEM; | |
1462 | goto out1; | |
1463 | } | |
1464 | ||
1465 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1466 | if (!inode) { | |
1467 | rc = -ENOMEM; | |
1468 | goto out1; | |
1469 | } | |
1470 | inode->i_fop = &sel_perm_ops; | |
1471 | /* i+1 since perm values are 1-indexed */ | |
1472 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1473 | d_add(dentry, inode); | |
1474 | } | |
1475 | ||
1476 | out1: | |
1477 | for (i = 0; i < nperms; i++) | |
1478 | kfree(perms[i]); | |
1479 | kfree(perms); | |
1480 | out: | |
1481 | return rc; | |
1482 | } | |
1483 | ||
1484 | static int sel_make_class_dir_entries(char *classname, int index, | |
1485 | struct dentry *dir) | |
1486 | { | |
1487 | struct dentry *dentry = NULL; | |
1488 | struct inode *inode = NULL; | |
1489 | int rc; | |
1490 | ||
1491 | dentry = d_alloc_name(dir, "index"); | |
1492 | if (!dentry) { | |
1493 | rc = -ENOMEM; | |
1494 | goto out; | |
1495 | } | |
1496 | ||
1497 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1498 | if (!inode) { | |
1499 | rc = -ENOMEM; | |
1500 | goto out; | |
1501 | } | |
1502 | ||
1503 | inode->i_fop = &sel_class_ops; | |
1504 | inode->i_ino = sel_class_to_ino(index); | |
1505 | d_add(dentry, inode); | |
1506 | ||
1507 | dentry = d_alloc_name(dir, "perms"); | |
1508 | if (!dentry) { | |
1509 | rc = -ENOMEM; | |
1510 | goto out; | |
1511 | } | |
1512 | ||
1513 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1514 | if (rc) | |
1515 | goto out; | |
1516 | ||
1517 | rc = sel_make_perm_files(classname, index, dentry); | |
1518 | ||
1519 | out: | |
1520 | return rc; | |
1521 | } | |
1522 | ||
1523 | static void sel_remove_classes(void) | |
1524 | { | |
1525 | struct list_head *class_node; | |
1526 | ||
1527 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1528 | struct dentry *class_subdir = list_entry(class_node, | |
1529 | struct dentry, d_u.d_child); | |
1530 | struct list_head *class_subdir_node; | |
1531 | ||
1532 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1533 | struct dentry *d = list_entry(class_subdir_node, | |
1534 | struct dentry, d_u.d_child); | |
1535 | ||
1536 | if (d->d_inode) | |
1537 | if (d->d_inode->i_mode & S_IFDIR) | |
1538 | sel_remove_entries(d); | |
1539 | } | |
1540 | ||
1541 | sel_remove_entries(class_subdir); | |
1542 | } | |
1543 | ||
1544 | sel_remove_entries(class_dir); | |
1545 | } | |
1546 | ||
1547 | static int sel_make_classes(void) | |
1548 | { | |
1549 | int rc = 0, nclasses, i; | |
1550 | char **classes; | |
1551 | ||
1552 | /* delete any existing entries */ | |
1553 | sel_remove_classes(); | |
1554 | ||
1555 | rc = security_get_classes(&classes, &nclasses); | |
1556 | if (rc < 0) | |
1557 | goto out; | |
1558 | ||
1559 | /* +2 since classes are 1-indexed */ | |
1560 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1561 | ||
1562 | for (i = 0; i < nclasses; i++) { | |
1563 | struct dentry *class_name_dir; | |
1564 | ||
1565 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1566 | if (!class_name_dir) { | |
1567 | rc = -ENOMEM; | |
1568 | goto out1; | |
1569 | } | |
1570 | ||
1571 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1572 | &last_class_ino); | |
1573 | if (rc) | |
1574 | goto out1; | |
1575 | ||
1576 | /* i+1 since class values are 1-indexed */ | |
1577 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1578 | class_name_dir); | |
1579 | if (rc) | |
1580 | goto out1; | |
1581 | } | |
1582 | ||
1583 | out1: | |
1584 | for (i = 0; i < nclasses; i++) | |
1585 | kfree(classes[i]); | |
1586 | kfree(classes); | |
1587 | out: | |
1588 | return rc; | |
1589 | } | |
1590 | ||
3bb56b25 PM |
1591 | static int sel_make_policycap(void) |
1592 | { | |
1593 | unsigned int iter; | |
1594 | struct dentry *dentry = NULL; | |
1595 | struct inode *inode = NULL; | |
1596 | ||
1597 | sel_remove_entries(policycap_dir); | |
1598 | ||
1599 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1600 | if (iter < ARRAY_SIZE(policycap_names)) | |
1601 | dentry = d_alloc_name(policycap_dir, | |
1602 | policycap_names[iter]); | |
1603 | else | |
1604 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1605 | ||
1606 | if (dentry == NULL) | |
1607 | return -ENOMEM; | |
1608 | ||
1609 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1610 | if (inode == NULL) | |
1611 | return -ENOMEM; | |
1612 | ||
1613 | inode->i_fop = &sel_policycap_ops; | |
1614 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1615 | d_add(dentry, inode); | |
1616 | } | |
1617 | ||
1618 | return 0; | |
1619 | } | |
1620 | ||
0dd4ae51 CP |
1621 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1622 | unsigned long *ino) | |
1da177e4 LT |
1623 | { |
1624 | int ret = 0; | |
1625 | struct inode *inode; | |
1626 | ||
edb20fb5 | 1627 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1628 | if (!inode) { |
1629 | ret = -ENOMEM; | |
1630 | goto out; | |
1631 | } | |
1632 | inode->i_op = &simple_dir_inode_operations; | |
1633 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1634 | inode->i_ino = ++(*ino); |
40e906f8 | 1635 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1636 | inc_nlink(inode); |
1da177e4 | 1637 | d_add(dentry, inode); |
edb20fb5 | 1638 | /* bump link count on parent directory, too */ |
d8c76e6f | 1639 | inc_nlink(dir); |
1da177e4 LT |
1640 | out: |
1641 | return ret; | |
1642 | } | |
1643 | ||
1644 | static int sel_fill_super(struct super_block * sb, void * data, int silent) | |
1645 | { | |
1646 | int ret; | |
1647 | struct dentry *dentry; | |
edb20fb5 | 1648 | struct inode *inode, *root_inode; |
1da177e4 LT |
1649 | struct inode_security_struct *isec; |
1650 | ||
1651 | static struct tree_descr selinux_files[] = { | |
1652 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1653 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1654 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1655 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1656 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1657 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1658 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1659 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1660 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1661 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1662 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1663 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1664 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1665 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1666 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1667 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1668 | /* last one */ {""} |
1669 | }; | |
1670 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1671 | if (ret) | |
161ce45a | 1672 | goto err; |
1da177e4 | 1673 | |
edb20fb5 JM |
1674 | root_inode = sb->s_root->d_inode; |
1675 | ||
1da177e4 | 1676 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1677 | if (!dentry) { |
1678 | ret = -ENOMEM; | |
1679 | goto err; | |
1680 | } | |
1da177e4 | 1681 | |
0dd4ae51 | 1682 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1683 | if (ret) |
161ce45a | 1684 | goto err; |
cde174a8 | 1685 | |
1da177e4 | 1686 | bool_dir = dentry; |
1da177e4 LT |
1687 | |
1688 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1689 | if (!dentry) { |
1690 | ret = -ENOMEM; | |
1691 | goto err; | |
1692 | } | |
1da177e4 LT |
1693 | |
1694 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1695 | if (!inode) { |
1696 | ret = -ENOMEM; | |
1697 | goto err; | |
1698 | } | |
6174eafc | 1699 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1700 | isec = (struct inode_security_struct*)inode->i_security; |
1701 | isec->sid = SECINITSID_DEVNULL; | |
1702 | isec->sclass = SECCLASS_CHR_FILE; | |
1703 | isec->initialized = 1; | |
1704 | ||
1705 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1706 | d_add(dentry, inode); | |
1707 | selinux_null = dentry; | |
1708 | ||
1709 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1710 | if (!dentry) { |
1711 | ret = -ENOMEM; | |
1712 | goto err; | |
1713 | } | |
1da177e4 | 1714 | |
0dd4ae51 | 1715 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1716 | if (ret) |
161ce45a | 1717 | goto err; |
1da177e4 LT |
1718 | |
1719 | ret = sel_make_avc_files(dentry); | |
1720 | if (ret) | |
161ce45a | 1721 | goto err; |
f0ee2e46 JC |
1722 | |
1723 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1724 | if (!dentry) { | |
1725 | ret = -ENOMEM; | |
1726 | goto err; | |
1727 | } | |
1728 | ||
0dd4ae51 | 1729 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1730 | if (ret) |
1731 | goto err; | |
1732 | ||
1733 | ret = sel_make_initcon_files(dentry); | |
1734 | if (ret) | |
1735 | goto err; | |
1736 | ||
e47c8fc5 CP |
1737 | dentry = d_alloc_name(sb->s_root, "class"); |
1738 | if (!dentry) { | |
1739 | ret = -ENOMEM; | |
1740 | goto err; | |
1741 | } | |
1742 | ||
1743 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1744 | if (ret) | |
1745 | goto err; | |
1746 | ||
1747 | class_dir = dentry; | |
1748 | ||
3bb56b25 PM |
1749 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1750 | if (!dentry) { | |
1751 | ret = -ENOMEM; | |
1752 | goto err; | |
1753 | } | |
1754 | ||
1755 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1756 | if (ret) | |
1757 | goto err; | |
1758 | ||
1759 | policycap_dir = dentry; | |
1760 | ||
1da177e4 | 1761 | out: |
161ce45a JM |
1762 | return ret; |
1763 | err: | |
744ba35e EP |
1764 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1765 | __func__); | |
161ce45a | 1766 | goto out; |
1da177e4 LT |
1767 | } |
1768 | ||
454e2398 DH |
1769 | static int sel_get_sb(struct file_system_type *fs_type, |
1770 | int flags, const char *dev_name, void *data, | |
1771 | struct vfsmount *mnt) | |
1da177e4 | 1772 | { |
454e2398 | 1773 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1774 | } |
1775 | ||
1776 | static struct file_system_type sel_fs_type = { | |
1777 | .name = "selinuxfs", | |
1778 | .get_sb = sel_get_sb, | |
1779 | .kill_sb = kill_litter_super, | |
1780 | }; | |
1781 | ||
1782 | struct vfsmount *selinuxfs_mount; | |
1783 | ||
1784 | static int __init init_sel_fs(void) | |
1785 | { | |
1786 | int err; | |
1787 | ||
1788 | if (!selinux_enabled) | |
1789 | return 0; | |
1790 | err = register_filesystem(&sel_fs_type); | |
1791 | if (!err) { | |
1792 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1793 | if (IS_ERR(selinuxfs_mount)) { | |
1794 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1795 | err = PTR_ERR(selinuxfs_mount); | |
1796 | selinuxfs_mount = NULL; | |
1797 | } | |
1798 | } | |
1799 | return err; | |
1800 | } | |
1801 | ||
1802 | __initcall(init_sel_fs); | |
1803 | ||
1804 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1805 | void exit_sel_fs(void) | |
1806 | { | |
1807 | unregister_filesystem(&sel_fs_type); | |
1808 | } | |
1809 | #endif |