Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
2 | * | |
1872981b | 3 | * Added conditional policy language extensions |
1da177e4 | 4 | * |
3bb56b25 PM |
5 | * Updated: Hewlett-Packard <paul.moore@hp.com> |
6 | * | |
1872981b | 7 | * Added support for the policy capability bitmap |
3bb56b25 PM |
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 | |
1872981b | 13 | * it under the terms of the GNU General Public License as published by |
1da177e4 LT |
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> |
f5269710 | 30 | #include <linux/uaccess.h> |
1da177e4 LT |
31 | |
32 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
33 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
34 | ||
35 | #include "flask.h" | |
36 | #include "avc.h" | |
37 | #include "avc_ss.h" | |
38 | #include "security.h" | |
39 | #include "objsec.h" | |
40 | #include "conditional.h" | |
41 | ||
3bb56b25 PM |
42 | /* Policy capability filenames */ |
43 | static char *policycap_names[] = { | |
b0c636b9 EP |
44 | "network_peer_controls", |
45 | "open_perms" | |
3bb56b25 PM |
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 | { | |
f5269710 EP |
60 | unsigned long checkreqprot; |
61 | if (!strict_strtoul(str, 0, &checkreqprot)) | |
62 | selinux_checkreqprot = checkreqprot ? 1 : 0; | |
1da177e4 LT |
63 | return 1; |
64 | } | |
65 | __setup("checkreqprot=", checkreqprot_setup); | |
66 | ||
4e5ab4cb JM |
67 | static int __init selinux_compat_net_setup(char *str) |
68 | { | |
f5269710 EP |
69 | unsigned long compat_net; |
70 | if (!strict_strtoul(str, 0, &compat_net)) | |
71 | selinux_compat_net = compat_net ? 1 : 0; | |
4e5ab4cb JM |
72 | return 1; |
73 | } | |
74 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
75 | ||
1da177e4 | 76 | |
bb003079 | 77 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
78 | |
79 | /* global data for booleans */ | |
1872981b EP |
80 | static struct dentry *bool_dir; |
81 | static int bool_num; | |
d313f948 | 82 | static char **bool_pending_names; |
1872981b | 83 | static int *bool_pending_values; |
1da177e4 | 84 | |
e47c8fc5 | 85 | /* global data for classes */ |
1872981b | 86 | static struct dentry *class_dir; |
e47c8fc5 CP |
87 | static unsigned long last_class_ino; |
88 | ||
3bb56b25 | 89 | /* global data for policy capabilities */ |
1872981b | 90 | static struct dentry *policycap_dir; |
3bb56b25 | 91 | |
1da177e4 LT |
92 | extern void selnl_notify_setenforce(int val); |
93 | ||
94 | /* Check whether a task is allowed to use a security operation. */ | |
95 | static int task_has_security(struct task_struct *tsk, | |
96 | u32 perms) | |
97 | { | |
c69e8d9c DH |
98 | const struct task_security_struct *tsec; |
99 | u32 sid = 0; | |
100 | ||
101 | rcu_read_lock(); | |
102 | tsec = __task_cred(tsk)->security; | |
103 | if (tsec) | |
104 | sid = tsec->sid; | |
105 | rcu_read_unlock(); | |
1da177e4 LT |
106 | if (!tsec) |
107 | return -EACCES; | |
108 | ||
c69e8d9c | 109 | return avc_has_perm(sid, SECINITSID_SECURITY, |
1da177e4 LT |
110 | SECCLASS_SECURITY, perms, NULL); |
111 | } | |
112 | ||
113 | enum sel_inos { | |
114 | SEL_ROOT_INO = 2, | |
115 | SEL_LOAD, /* load policy */ | |
116 | SEL_ENFORCE, /* get or set enforcing status */ | |
117 | SEL_CONTEXT, /* validate context */ | |
118 | SEL_ACCESS, /* compute access decision */ | |
119 | SEL_CREATE, /* compute create labeling decision */ | |
120 | SEL_RELABEL, /* compute relabeling decision */ | |
121 | SEL_USER, /* compute reachable user contexts */ | |
122 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
123 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
124 | SEL_MLS, /* return if MLS policy is enabled */ | |
125 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
126 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
127 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 128 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
129 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
130 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 131 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
132 | }; |
133 | ||
6174eafc JC |
134 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
135 | ||
3bb56b25 PM |
136 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
137 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
138 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
139 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
140 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 141 | |
1da177e4 LT |
142 | #define TMPBUFLEN 12 |
143 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
144 | size_t count, loff_t *ppos) | |
145 | { | |
146 | char tmpbuf[TMPBUFLEN]; | |
147 | ssize_t length; | |
148 | ||
149 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
150 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
151 | } | |
152 | ||
153 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
1872981b | 154 | static ssize_t sel_write_enforce(struct file *file, const char __user *buf, |
1da177e4 LT |
155 | size_t count, loff_t *ppos) |
156 | ||
157 | { | |
158 | char *page; | |
159 | ssize_t length; | |
160 | int new_value; | |
161 | ||
bfd51626 | 162 | if (count >= PAGE_SIZE) |
1da177e4 LT |
163 | return -ENOMEM; |
164 | if (*ppos != 0) { | |
165 | /* No partial writes. */ | |
166 | return -EINVAL; | |
167 | } | |
1872981b | 168 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
169 | if (!page) |
170 | return -ENOMEM; | |
171 | length = -EFAULT; | |
172 | if (copy_from_user(page, buf, count)) | |
173 | goto out; | |
174 | ||
175 | length = -EINVAL; | |
176 | if (sscanf(page, "%d", &new_value) != 1) | |
177 | goto out; | |
178 | ||
179 | if (new_value != selinux_enforcing) { | |
180 | length = task_has_security(current, SECURITY__SETENFORCE); | |
181 | if (length) | |
182 | goto out; | |
af601e46 | 183 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
184 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
185 | new_value, selinux_enforcing, | |
186 | audit_get_loginuid(current), | |
187 | audit_get_sessionid(current)); | |
1da177e4 LT |
188 | selinux_enforcing = new_value; |
189 | if (selinux_enforcing) | |
190 | avc_ss_reset(0); | |
191 | selnl_notify_setenforce(selinux_enforcing); | |
192 | } | |
193 | length = count; | |
194 | out: | |
195 | free_page((unsigned long) page); | |
196 | return length; | |
197 | } | |
198 | #else | |
199 | #define sel_write_enforce NULL | |
200 | #endif | |
201 | ||
9c2e08c5 | 202 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
203 | .read = sel_read_enforce, |
204 | .write = sel_write_enforce, | |
205 | }; | |
206 | ||
3f12070e EP |
207 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
208 | size_t count, loff_t *ppos) | |
209 | { | |
210 | char tmpbuf[TMPBUFLEN]; | |
211 | ssize_t length; | |
212 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
213 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
214 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
215 | ||
216 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
217 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
218 | } | |
219 | ||
220 | static const struct file_operations sel_handle_unknown_ops = { | |
221 | .read = sel_read_handle_unknown, | |
222 | }; | |
223 | ||
1da177e4 | 224 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1872981b | 225 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
1da177e4 LT |
226 | size_t count, loff_t *ppos) |
227 | ||
228 | { | |
229 | char *page; | |
230 | ssize_t length; | |
231 | int new_value; | |
232 | extern int selinux_disable(void); | |
233 | ||
bfd51626 | 234 | if (count >= PAGE_SIZE) |
1da177e4 LT |
235 | return -ENOMEM; |
236 | if (*ppos != 0) { | |
237 | /* No partial writes. */ | |
238 | return -EINVAL; | |
239 | } | |
1872981b | 240 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
241 | if (!page) |
242 | return -ENOMEM; | |
243 | length = -EFAULT; | |
244 | if (copy_from_user(page, buf, count)) | |
245 | goto out; | |
246 | ||
247 | length = -EINVAL; | |
248 | if (sscanf(page, "%d", &new_value) != 1) | |
249 | goto out; | |
250 | ||
251 | if (new_value) { | |
252 | length = selinux_disable(); | |
253 | if (length < 0) | |
254 | goto out; | |
af601e46 | 255 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
256 | "selinux=0 auid=%u ses=%u", |
257 | audit_get_loginuid(current), | |
258 | audit_get_sessionid(current)); | |
1da177e4 LT |
259 | } |
260 | ||
261 | length = count; | |
262 | out: | |
263 | free_page((unsigned long) page); | |
264 | return length; | |
265 | } | |
266 | #else | |
267 | #define sel_write_disable NULL | |
268 | #endif | |
269 | ||
9c2e08c5 | 270 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
271 | .write = sel_write_disable, |
272 | }; | |
273 | ||
274 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
1872981b | 275 | size_t count, loff_t *ppos) |
1da177e4 LT |
276 | { |
277 | char tmpbuf[TMPBUFLEN]; | |
278 | ssize_t length; | |
279 | ||
280 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
281 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
282 | } | |
283 | ||
9c2e08c5 | 284 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
285 | .read = sel_read_policyvers, |
286 | }; | |
287 | ||
288 | /* declaration for sel_write_load */ | |
289 | static int sel_make_bools(void); | |
e47c8fc5 | 290 | static int sel_make_classes(void); |
3bb56b25 | 291 | static int sel_make_policycap(void); |
e47c8fc5 CP |
292 | |
293 | /* declaration for sel_make_class_dirs */ | |
294 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
295 | unsigned long *ino); | |
1da177e4 LT |
296 | |
297 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
298 | size_t count, loff_t *ppos) | |
299 | { | |
300 | char tmpbuf[TMPBUFLEN]; | |
301 | ssize_t length; | |
302 | ||
303 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
304 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
305 | } | |
306 | ||
9c2e08c5 | 307 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
308 | .read = sel_read_mls, |
309 | }; | |
310 | ||
1872981b | 311 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
312 | size_t count, loff_t *ppos) |
313 | ||
314 | { | |
315 | int ret; | |
316 | ssize_t length; | |
317 | void *data = NULL; | |
318 | ||
bb003079 | 319 | mutex_lock(&sel_mutex); |
1da177e4 LT |
320 | |
321 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
322 | if (length) | |
323 | goto out; | |
324 | ||
325 | if (*ppos != 0) { | |
326 | /* No partial writes. */ | |
327 | length = -EINVAL; | |
328 | goto out; | |
329 | } | |
330 | ||
bfd51626 | 331 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
332 | || (data = vmalloc(count)) == NULL) { |
333 | length = -ENOMEM; | |
334 | goto out; | |
335 | } | |
336 | ||
337 | length = -EFAULT; | |
338 | if (copy_from_user(data, buf, count) != 0) | |
339 | goto out; | |
340 | ||
341 | length = security_load_policy(data, count); | |
342 | if (length) | |
343 | goto out; | |
344 | ||
345 | ret = sel_make_bools(); | |
e47c8fc5 CP |
346 | if (ret) { |
347 | length = ret; | |
348 | goto out1; | |
349 | } | |
350 | ||
351 | ret = sel_make_classes(); | |
3bb56b25 PM |
352 | if (ret) { |
353 | length = ret; | |
354 | goto out1; | |
355 | } | |
356 | ||
357 | ret = sel_make_policycap(); | |
1da177e4 LT |
358 | if (ret) |
359 | length = ret; | |
360 | else | |
361 | length = count; | |
e47c8fc5 CP |
362 | |
363 | out1: | |
af601e46 | 364 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
365 | "policy loaded auid=%u ses=%u", |
366 | audit_get_loginuid(current), | |
367 | audit_get_sessionid(current)); | |
1da177e4 | 368 | out: |
bb003079 | 369 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
370 | vfree(data); |
371 | return length; | |
372 | } | |
373 | ||
9c2e08c5 | 374 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
375 | .write = sel_write_load, |
376 | }; | |
377 | ||
1872981b | 378 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 379 | { |
ce9982d0 SS |
380 | char *canon; |
381 | u32 sid, len; | |
1da177e4 LT |
382 | ssize_t length; |
383 | ||
384 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
385 | if (length) | |
386 | return length; | |
387 | ||
ce9982d0 SS |
388 | length = security_context_to_sid(buf, size, &sid); |
389 | if (length < 0) | |
390 | return length; | |
1da177e4 | 391 | |
ce9982d0 | 392 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 393 | if (length < 0) |
ce9982d0 SS |
394 | return length; |
395 | ||
396 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
397 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
398 | "payload max\n", __func__, len); | |
ce9982d0 | 399 | length = -ERANGE; |
1da177e4 | 400 | goto out; |
ce9982d0 | 401 | } |
1da177e4 | 402 | |
ce9982d0 SS |
403 | memcpy(buf, canon, len); |
404 | length = len; | |
1da177e4 | 405 | out: |
ce9982d0 | 406 | kfree(canon); |
1da177e4 LT |
407 | return length; |
408 | } | |
409 | ||
1da177e4 LT |
410 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
411 | size_t count, loff_t *ppos) | |
412 | { | |
413 | char tmpbuf[TMPBUFLEN]; | |
414 | ssize_t length; | |
415 | ||
416 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
417 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
418 | } | |
419 | ||
1872981b | 420 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
421 | size_t count, loff_t *ppos) |
422 | { | |
423 | char *page; | |
424 | ssize_t length; | |
425 | unsigned int new_value; | |
426 | ||
427 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
428 | if (length) | |
429 | return length; | |
430 | ||
bfd51626 | 431 | if (count >= PAGE_SIZE) |
1da177e4 LT |
432 | return -ENOMEM; |
433 | if (*ppos != 0) { | |
434 | /* No partial writes. */ | |
435 | return -EINVAL; | |
436 | } | |
1872981b | 437 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
438 | if (!page) |
439 | return -ENOMEM; | |
440 | length = -EFAULT; | |
441 | if (copy_from_user(page, buf, count)) | |
442 | goto out; | |
443 | ||
444 | length = -EINVAL; | |
445 | if (sscanf(page, "%u", &new_value) != 1) | |
446 | goto out; | |
447 | ||
448 | selinux_checkreqprot = new_value ? 1 : 0; | |
449 | length = count; | |
450 | out: | |
451 | free_page((unsigned long) page); | |
452 | return length; | |
453 | } | |
9c2e08c5 | 454 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
455 | .read = sel_read_checkreqprot, |
456 | .write = sel_write_checkreqprot, | |
457 | }; | |
458 | ||
4e5ab4cb JM |
459 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
460 | size_t count, loff_t *ppos) | |
461 | { | |
462 | char tmpbuf[TMPBUFLEN]; | |
463 | ssize_t length; | |
464 | ||
465 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
466 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
467 | } | |
468 | ||
1872981b | 469 | static ssize_t sel_write_compat_net(struct file *file, const char __user *buf, |
4e5ab4cb JM |
470 | size_t count, loff_t *ppos) |
471 | { | |
472 | char *page; | |
473 | ssize_t length; | |
474 | int new_value; | |
475 | ||
476 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
477 | if (length) | |
478 | return length; | |
479 | ||
480 | if (count >= PAGE_SIZE) | |
481 | return -ENOMEM; | |
482 | if (*ppos != 0) { | |
483 | /* No partial writes. */ | |
484 | return -EINVAL; | |
485 | } | |
1872981b | 486 | page = (char *)get_zeroed_page(GFP_KERNEL); |
4e5ab4cb JM |
487 | if (!page) |
488 | return -ENOMEM; | |
489 | length = -EFAULT; | |
490 | if (copy_from_user(page, buf, count)) | |
491 | goto out; | |
492 | ||
493 | length = -EINVAL; | |
494 | if (sscanf(page, "%d", &new_value) != 1) | |
495 | goto out; | |
496 | ||
497 | selinux_compat_net = new_value ? 1 : 0; | |
498 | length = count; | |
499 | out: | |
500 | free_page((unsigned long) page); | |
501 | return length; | |
502 | } | |
9c2e08c5 | 503 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
504 | .read = sel_read_compat_net, |
505 | .write = sel_write_compat_net, | |
506 | }; | |
507 | ||
1da177e4 LT |
508 | /* |
509 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
510 | */ | |
1872981b EP |
511 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
512 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
513 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
514 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
515 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 LT |
516 | |
517 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
518 | [SEL_ACCESS] = sel_write_access, | |
519 | [SEL_CREATE] = sel_write_create, | |
520 | [SEL_RELABEL] = sel_write_relabel, | |
521 | [SEL_USER] = sel_write_user, | |
522 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 523 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
524 | }; |
525 | ||
526 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
527 | { | |
1872981b | 528 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
529 | char *data; |
530 | ssize_t rv; | |
531 | ||
6e20a64a | 532 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
533 | return -EINVAL; |
534 | ||
535 | data = simple_transaction_get(file, buf, size); | |
536 | if (IS_ERR(data)) | |
537 | return PTR_ERR(data); | |
538 | ||
1872981b EP |
539 | rv = write_op[ino](file, data, size); |
540 | if (rv > 0) { | |
1da177e4 LT |
541 | simple_transaction_set(file, rv); |
542 | rv = size; | |
543 | } | |
544 | return rv; | |
545 | } | |
546 | ||
9c2e08c5 | 547 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
548 | .write = selinux_transaction_write, |
549 | .read = simple_transaction_read, | |
550 | .release = simple_transaction_release, | |
551 | }; | |
552 | ||
553 | /* | |
554 | * payload - write methods | |
555 | * If the method has a response, the response should be put in buf, | |
556 | * and the length returned. Otherwise return 0 or and -error. | |
557 | */ | |
558 | ||
1872981b | 559 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 LT |
560 | { |
561 | char *scon, *tcon; | |
562 | u32 ssid, tsid; | |
563 | u16 tclass; | |
564 | u32 req; | |
565 | struct av_decision avd; | |
566 | ssize_t length; | |
567 | ||
568 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
569 | if (length) | |
570 | return length; | |
571 | ||
572 | length = -ENOMEM; | |
89d155ef | 573 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
574 | if (!scon) |
575 | return length; | |
1da177e4 | 576 | |
89d155ef | 577 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
578 | if (!tcon) |
579 | goto out; | |
1da177e4 LT |
580 | |
581 | length = -EINVAL; | |
582 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
583 | goto out2; | |
584 | ||
585 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
586 | if (length < 0) | |
587 | goto out2; | |
588 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
589 | if (length < 0) | |
590 | goto out2; | |
591 | ||
592 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
593 | if (length < 0) | |
594 | goto out2; | |
595 | ||
596 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
597 | "%x %x %x %x %u", | |
598 | avd.allowed, avd.decided, | |
599 | avd.auditallow, avd.auditdeny, | |
600 | avd.seqno); | |
601 | out2: | |
602 | kfree(tcon); | |
603 | out: | |
604 | kfree(scon); | |
605 | return length; | |
606 | } | |
607 | ||
1872981b | 608 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 LT |
609 | { |
610 | char *scon, *tcon; | |
611 | u32 ssid, tsid, newsid; | |
612 | u16 tclass; | |
613 | ssize_t length; | |
614 | char *newcon; | |
615 | u32 len; | |
616 | ||
617 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
618 | if (length) | |
619 | return length; | |
620 | ||
621 | length = -ENOMEM; | |
89d155ef | 622 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
623 | if (!scon) |
624 | return length; | |
1da177e4 | 625 | |
89d155ef | 626 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
627 | if (!tcon) |
628 | goto out; | |
1da177e4 LT |
629 | |
630 | length = -EINVAL; | |
631 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
632 | goto out2; | |
633 | ||
634 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
635 | if (length < 0) | |
636 | goto out2; | |
637 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
638 | if (length < 0) | |
639 | goto out2; | |
640 | ||
641 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
642 | if (length < 0) | |
643 | goto out2; | |
644 | ||
645 | length = security_sid_to_context(newsid, &newcon, &len); | |
646 | if (length < 0) | |
647 | goto out2; | |
648 | ||
649 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
650 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
651 | "payload max\n", __func__, len); | |
1da177e4 LT |
652 | length = -ERANGE; |
653 | goto out3; | |
654 | } | |
655 | ||
656 | memcpy(buf, newcon, len); | |
657 | length = len; | |
658 | out3: | |
659 | kfree(newcon); | |
660 | out2: | |
661 | kfree(tcon); | |
662 | out: | |
663 | kfree(scon); | |
664 | return length; | |
665 | } | |
666 | ||
1872981b | 667 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 LT |
668 | { |
669 | char *scon, *tcon; | |
670 | u32 ssid, tsid, newsid; | |
671 | u16 tclass; | |
672 | ssize_t length; | |
673 | char *newcon; | |
674 | u32 len; | |
675 | ||
676 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
677 | if (length) | |
678 | return length; | |
679 | ||
680 | length = -ENOMEM; | |
89d155ef | 681 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
682 | if (!scon) |
683 | return length; | |
1da177e4 | 684 | |
89d155ef | 685 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
686 | if (!tcon) |
687 | goto out; | |
1da177e4 LT |
688 | |
689 | length = -EINVAL; | |
690 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
691 | goto out2; | |
692 | ||
693 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
694 | if (length < 0) | |
695 | goto out2; | |
696 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
697 | if (length < 0) | |
698 | goto out2; | |
699 | ||
700 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
701 | if (length < 0) | |
702 | goto out2; | |
703 | ||
704 | length = security_sid_to_context(newsid, &newcon, &len); | |
705 | if (length < 0) | |
706 | goto out2; | |
707 | ||
708 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
709 | length = -ERANGE; | |
710 | goto out3; | |
711 | } | |
712 | ||
713 | memcpy(buf, newcon, len); | |
714 | length = len; | |
715 | out3: | |
716 | kfree(newcon); | |
717 | out2: | |
718 | kfree(tcon); | |
719 | out: | |
720 | kfree(scon); | |
721 | return length; | |
722 | } | |
723 | ||
1872981b | 724 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 LT |
725 | { |
726 | char *con, *user, *ptr; | |
727 | u32 sid, *sids; | |
728 | ssize_t length; | |
729 | char *newcon; | |
730 | int i, rc; | |
731 | u32 len, nsids; | |
732 | ||
733 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
734 | if (length) | |
735 | return length; | |
736 | ||
737 | length = -ENOMEM; | |
89d155ef | 738 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
739 | if (!con) |
740 | return length; | |
1da177e4 | 741 | |
89d155ef | 742 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
743 | if (!user) |
744 | goto out; | |
1da177e4 LT |
745 | |
746 | length = -EINVAL; | |
747 | if (sscanf(buf, "%s %s", con, user) != 2) | |
748 | goto out2; | |
749 | ||
750 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
751 | if (length < 0) | |
752 | goto out2; | |
753 | ||
754 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
755 | if (length < 0) | |
756 | goto out2; | |
757 | ||
758 | length = sprintf(buf, "%u", nsids) + 1; | |
759 | ptr = buf + length; | |
760 | for (i = 0; i < nsids; i++) { | |
761 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
762 | if (rc) { | |
763 | length = rc; | |
764 | goto out3; | |
765 | } | |
766 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
767 | kfree(newcon); | |
768 | length = -ERANGE; | |
769 | goto out3; | |
770 | } | |
771 | memcpy(ptr, newcon, len); | |
772 | kfree(newcon); | |
773 | ptr += len; | |
774 | length += len; | |
775 | } | |
776 | out3: | |
777 | kfree(sids); | |
778 | out2: | |
779 | kfree(user); | |
780 | out: | |
781 | kfree(con); | |
782 | return length; | |
783 | } | |
784 | ||
1872981b | 785 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 LT |
786 | { |
787 | char *scon, *tcon; | |
788 | u32 ssid, tsid, newsid; | |
789 | u16 tclass; | |
790 | ssize_t length; | |
791 | char *newcon; | |
792 | u32 len; | |
793 | ||
794 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
795 | if (length) | |
796 | return length; | |
797 | ||
798 | length = -ENOMEM; | |
89d155ef | 799 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
800 | if (!scon) |
801 | return length; | |
1da177e4 | 802 | |
89d155ef | 803 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
804 | if (!tcon) |
805 | goto out; | |
1da177e4 LT |
806 | |
807 | length = -EINVAL; | |
808 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
809 | goto out2; | |
810 | ||
811 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
812 | if (length < 0) | |
813 | goto out2; | |
814 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
815 | if (length < 0) | |
816 | goto out2; | |
817 | ||
818 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
819 | if (length < 0) | |
820 | goto out2; | |
821 | ||
822 | length = security_sid_to_context(newsid, &newcon, &len); | |
823 | if (length < 0) | |
824 | goto out2; | |
825 | ||
826 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
827 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
828 | "payload max\n", __func__, len); | |
1da177e4 LT |
829 | length = -ERANGE; |
830 | goto out3; | |
831 | } | |
832 | ||
833 | memcpy(buf, newcon, len); | |
834 | length = len; | |
835 | out3: | |
836 | kfree(newcon); | |
837 | out2: | |
838 | kfree(tcon); | |
839 | out: | |
840 | kfree(scon); | |
841 | return length; | |
842 | } | |
843 | ||
844 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
845 | { | |
846 | struct inode *ret = new_inode(sb); | |
847 | ||
848 | if (ret) { | |
849 | ret->i_mode = mode; | |
850 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
851 | ret->i_blocks = 0; |
852 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
853 | } | |
854 | return ret; | |
855 | } | |
856 | ||
1da177e4 LT |
857 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
858 | size_t count, loff_t *ppos) | |
859 | { | |
860 | char *page = NULL; | |
861 | ssize_t length; | |
1da177e4 LT |
862 | ssize_t ret; |
863 | int cur_enforcing; | |
d313f948 SS |
864 | struct inode *inode = filep->f_path.dentry->d_inode; |
865 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
866 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 867 | |
bb003079 | 868 | mutex_lock(&sel_mutex); |
1da177e4 | 869 | |
d313f948 SS |
870 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
871 | ret = -EINVAL; | |
872 | goto out; | |
873 | } | |
1da177e4 | 874 | |
bfd51626 | 875 | if (count > PAGE_SIZE) { |
1da177e4 LT |
876 | ret = -EINVAL; |
877 | goto out; | |
878 | } | |
1872981b EP |
879 | page = (char *)get_zeroed_page(GFP_KERNEL); |
880 | if (!page) { | |
1da177e4 LT |
881 | ret = -ENOMEM; |
882 | goto out; | |
883 | } | |
884 | ||
d313f948 | 885 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
886 | if (cur_enforcing < 0) { |
887 | ret = cur_enforcing; | |
888 | goto out; | |
889 | } | |
1da177e4 | 890 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 891 | bool_pending_values[index]); |
68bdcf28 | 892 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 893 | out: |
bb003079 | 894 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
895 | if (page) |
896 | free_page((unsigned long)page); | |
897 | return ret; | |
898 | } | |
899 | ||
900 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
901 | size_t count, loff_t *ppos) | |
902 | { | |
903 | char *page = NULL; | |
d313f948 | 904 | ssize_t length; |
1da177e4 | 905 | int new_value; |
d313f948 SS |
906 | struct inode *inode = filep->f_path.dentry->d_inode; |
907 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
908 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 909 | |
bb003079 | 910 | mutex_lock(&sel_mutex); |
1da177e4 LT |
911 | |
912 | length = task_has_security(current, SECURITY__SETBOOL); | |
913 | if (length) | |
914 | goto out; | |
915 | ||
d313f948 SS |
916 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
917 | length = -EINVAL; | |
918 | goto out; | |
919 | } | |
920 | ||
bfd51626 | 921 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
922 | length = -ENOMEM; |
923 | goto out; | |
924 | } | |
d313f948 | 925 | |
1da177e4 LT |
926 | if (*ppos != 0) { |
927 | /* No partial writes. */ | |
d313f948 | 928 | length = -EINVAL; |
1da177e4 LT |
929 | goto out; |
930 | } | |
1872981b | 931 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
932 | if (!page) { |
933 | length = -ENOMEM; | |
934 | goto out; | |
935 | } | |
936 | ||
d313f948 | 937 | length = -EFAULT; |
1da177e4 LT |
938 | if (copy_from_user(page, buf, count)) |
939 | goto out; | |
940 | ||
941 | length = -EINVAL; | |
942 | if (sscanf(page, "%d", &new_value) != 1) | |
943 | goto out; | |
944 | ||
945 | if (new_value) | |
946 | new_value = 1; | |
947 | ||
d313f948 | 948 | bool_pending_values[index] = new_value; |
1da177e4 LT |
949 | length = count; |
950 | ||
951 | out: | |
bb003079 | 952 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
953 | if (page) |
954 | free_page((unsigned long) page); | |
955 | return length; | |
956 | } | |
957 | ||
9c2e08c5 | 958 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
959 | .read = sel_read_bool, |
960 | .write = sel_write_bool, | |
1da177e4 LT |
961 | }; |
962 | ||
963 | static ssize_t sel_commit_bools_write(struct file *filep, | |
964 | const char __user *buf, | |
965 | size_t count, loff_t *ppos) | |
966 | { | |
967 | char *page = NULL; | |
d313f948 | 968 | ssize_t length; |
1da177e4 LT |
969 | int new_value; |
970 | ||
bb003079 | 971 | mutex_lock(&sel_mutex); |
1da177e4 LT |
972 | |
973 | length = task_has_security(current, SECURITY__SETBOOL); | |
974 | if (length) | |
975 | goto out; | |
976 | ||
bfd51626 | 977 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
978 | length = -ENOMEM; |
979 | goto out; | |
980 | } | |
981 | if (*ppos != 0) { | |
982 | /* No partial writes. */ | |
983 | goto out; | |
984 | } | |
1872981b | 985 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
986 | if (!page) { |
987 | length = -ENOMEM; | |
988 | goto out; | |
989 | } | |
990 | ||
d313f948 | 991 | length = -EFAULT; |
1da177e4 LT |
992 | if (copy_from_user(page, buf, count)) |
993 | goto out; | |
994 | ||
995 | length = -EINVAL; | |
996 | if (sscanf(page, "%d", &new_value) != 1) | |
997 | goto out; | |
998 | ||
1872981b | 999 | if (new_value && bool_pending_values) |
1da177e4 | 1000 | security_set_bools(bool_num, bool_pending_values); |
1da177e4 LT |
1001 | |
1002 | length = count; | |
1003 | ||
1004 | out: | |
bb003079 | 1005 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
1006 | if (page) |
1007 | free_page((unsigned long) page); | |
1008 | return length; | |
1009 | } | |
1010 | ||
9c2e08c5 | 1011 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 1012 | .write = sel_commit_bools_write, |
1da177e4 LT |
1013 | }; |
1014 | ||
0c92d7c7 | 1015 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1016 | { |
0955dc03 | 1017 | struct list_head *node; |
1da177e4 LT |
1018 | |
1019 | spin_lock(&dcache_lock); | |
1020 | node = de->d_subdirs.next; | |
1021 | while (node != &de->d_subdirs) { | |
5160ee6f | 1022 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
1023 | list_del_init(node); |
1024 | ||
1025 | if (d->d_inode) { | |
1026 | d = dget_locked(d); | |
1027 | spin_unlock(&dcache_lock); | |
1028 | d_delete(d); | |
1029 | simple_unlink(de->d_inode, d); | |
1030 | dput(d); | |
1031 | spin_lock(&dcache_lock); | |
1032 | } | |
1033 | node = de->d_subdirs.next; | |
1034 | } | |
1035 | ||
1036 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | #define BOOL_DIR_NAME "booleans" | |
1040 | ||
1041 | static int sel_make_bools(void) | |
1042 | { | |
1043 | int i, ret = 0; | |
1044 | ssize_t len; | |
1045 | struct dentry *dentry = NULL; | |
1046 | struct dentry *dir = bool_dir; | |
1047 | struct inode *inode = NULL; | |
1048 | struct inode_security_struct *isec; | |
1049 | char **names = NULL, *page; | |
1050 | int num; | |
1051 | int *values = NULL; | |
1052 | u32 sid; | |
1053 | ||
1054 | /* remove any existing files */ | |
d313f948 | 1055 | kfree(bool_pending_names); |
9a5f04bf | 1056 | kfree(bool_pending_values); |
d313f948 | 1057 | bool_pending_names = NULL; |
20c19e41 | 1058 | bool_pending_values = NULL; |
1da177e4 | 1059 | |
0c92d7c7 | 1060 | sel_remove_entries(dir); |
1da177e4 | 1061 | |
1872981b EP |
1062 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1063 | if (!page) | |
1da177e4 LT |
1064 | return -ENOMEM; |
1065 | ||
1066 | ret = security_get_bools(&num, &names, &values); | |
1067 | if (ret != 0) | |
1068 | goto out; | |
1069 | ||
1070 | for (i = 0; i < num; i++) { | |
1071 | dentry = d_alloc_name(dir, names[i]); | |
1072 | if (!dentry) { | |
1073 | ret = -ENOMEM; | |
1074 | goto err; | |
1075 | } | |
1076 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1077 | if (!inode) { | |
1078 | ret = -ENOMEM; | |
1079 | goto err; | |
1080 | } | |
1081 | ||
1082 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1083 | if (len < 0) { | |
1084 | ret = -EINVAL; | |
1085 | goto err; | |
1086 | } else if (len >= PAGE_SIZE) { | |
1087 | ret = -ENAMETOOLONG; | |
1088 | goto err; | |
1089 | } | |
1872981b EP |
1090 | isec = (struct inode_security_struct *)inode->i_security; |
1091 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); | |
1092 | if (ret) | |
1da177e4 LT |
1093 | goto err; |
1094 | isec->sid = sid; | |
1095 | isec->initialized = 1; | |
1096 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1097 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1098 | d_add(dentry, inode); |
1099 | } | |
1100 | bool_num = num; | |
d313f948 | 1101 | bool_pending_names = names; |
1da177e4 LT |
1102 | bool_pending_values = values; |
1103 | out: | |
1104 | free_page((unsigned long)page); | |
d313f948 SS |
1105 | return ret; |
1106 | err: | |
1da177e4 | 1107 | if (names) { |
9a5f04bf JJ |
1108 | for (i = 0; i < num; i++) |
1109 | kfree(names[i]); | |
1da177e4 LT |
1110 | kfree(names); |
1111 | } | |
20c19e41 | 1112 | kfree(values); |
0c92d7c7 | 1113 | sel_remove_entries(dir); |
1da177e4 LT |
1114 | ret = -ENOMEM; |
1115 | goto out; | |
1116 | } | |
1117 | ||
1118 | #define NULL_FILE_NAME "null" | |
1119 | ||
1872981b | 1120 | struct dentry *selinux_null; |
1da177e4 LT |
1121 | |
1122 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1123 | size_t count, loff_t *ppos) | |
1124 | { | |
1125 | char tmpbuf[TMPBUFLEN]; | |
1126 | ssize_t length; | |
1127 | ||
1128 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1129 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1130 | } | |
1131 | ||
1872981b EP |
1132 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1133 | const char __user *buf, | |
1da177e4 LT |
1134 | size_t count, loff_t *ppos) |
1135 | ||
1136 | { | |
1137 | char *page; | |
1138 | ssize_t ret; | |
1139 | int new_value; | |
1140 | ||
bfd51626 | 1141 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1142 | ret = -ENOMEM; |
1143 | goto out; | |
1144 | } | |
1145 | ||
1146 | if (*ppos != 0) { | |
1147 | /* No partial writes. */ | |
1148 | ret = -EINVAL; | |
1149 | goto out; | |
1150 | } | |
1151 | ||
1872981b | 1152 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
1153 | if (!page) { |
1154 | ret = -ENOMEM; | |
1155 | goto out; | |
1156 | } | |
1157 | ||
1158 | if (copy_from_user(page, buf, count)) { | |
1159 | ret = -EFAULT; | |
1160 | goto out_free; | |
1161 | } | |
1162 | ||
1163 | if (sscanf(page, "%u", &new_value) != 1) { | |
1164 | ret = -EINVAL; | |
1165 | goto out; | |
1166 | } | |
1167 | ||
1168 | if (new_value != avc_cache_threshold) { | |
1169 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1170 | if (ret) | |
1171 | goto out_free; | |
1172 | avc_cache_threshold = new_value; | |
1173 | } | |
1174 | ret = count; | |
1175 | out_free: | |
1176 | free_page((unsigned long)page); | |
1177 | out: | |
1178 | return ret; | |
1179 | } | |
1180 | ||
1181 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1182 | size_t count, loff_t *ppos) | |
1183 | { | |
1184 | char *page; | |
1185 | ssize_t ret = 0; | |
1186 | ||
1187 | page = (char *)__get_free_page(GFP_KERNEL); | |
1188 | if (!page) { | |
1189 | ret = -ENOMEM; | |
1190 | goto out; | |
1191 | } | |
1192 | ret = avc_get_hash_stats(page); | |
1193 | if (ret >= 0) | |
1194 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1195 | free_page((unsigned long)page); | |
1196 | out: | |
1197 | return ret; | |
1198 | } | |
1199 | ||
9c2e08c5 | 1200 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1201 | .read = sel_read_avc_cache_threshold, |
1202 | .write = sel_write_avc_cache_threshold, | |
1203 | }; | |
1204 | ||
9c2e08c5 | 1205 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1206 | .read = sel_read_avc_hash_stats, |
1207 | }; | |
1208 | ||
1209 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1210 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1211 | { | |
1212 | int cpu; | |
1213 | ||
4f4b6c1a | 1214 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1215 | if (!cpu_possible(cpu)) |
1216 | continue; | |
1217 | *idx = cpu + 1; | |
1218 | return &per_cpu(avc_cache_stats, cpu); | |
1219 | } | |
1220 | return NULL; | |
1221 | } | |
1222 | ||
1223 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1224 | { | |
1225 | loff_t n = *pos - 1; | |
1226 | ||
1227 | if (*pos == 0) | |
1228 | return SEQ_START_TOKEN; | |
1229 | ||
1230 | return sel_avc_get_stat_idx(&n); | |
1231 | } | |
1232 | ||
1233 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1234 | { | |
1235 | return sel_avc_get_stat_idx(pos); | |
1236 | } | |
1237 | ||
1238 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1239 | { | |
1240 | struct avc_cache_stats *st = v; | |
1241 | ||
1242 | if (v == SEQ_START_TOKEN) | |
1243 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1244 | "frees\n"); | |
1245 | else | |
1246 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1247 | st->hits, st->misses, st->allocations, | |
1248 | st->reclaims, st->frees); | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1253 | { } | |
1254 | ||
1996a109 | 1255 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1256 | .start = sel_avc_stats_seq_start, |
1257 | .next = sel_avc_stats_seq_next, | |
1258 | .show = sel_avc_stats_seq_show, | |
1259 | .stop = sel_avc_stats_seq_stop, | |
1260 | }; | |
1261 | ||
1262 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1263 | { | |
1264 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1265 | } | |
1266 | ||
9c2e08c5 | 1267 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1268 | .open = sel_open_avc_cache_stats, |
1269 | .read = seq_read, | |
1270 | .llseek = seq_lseek, | |
1271 | .release = seq_release, | |
1272 | }; | |
1273 | #endif | |
1274 | ||
1275 | static int sel_make_avc_files(struct dentry *dir) | |
1276 | { | |
1277 | int i, ret = 0; | |
1278 | static struct tree_descr files[] = { | |
1279 | { "cache_threshold", | |
1280 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1281 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1282 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1283 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1284 | #endif | |
1285 | }; | |
1286 | ||
6e20a64a | 1287 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1288 | struct inode *inode; |
1289 | struct dentry *dentry; | |
1290 | ||
1291 | dentry = d_alloc_name(dir, files[i].name); | |
1292 | if (!dentry) { | |
1293 | ret = -ENOMEM; | |
d6aafa65 | 1294 | goto out; |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1298 | if (!inode) { | |
1299 | ret = -ENOMEM; | |
d6aafa65 | 1300 | goto out; |
1da177e4 LT |
1301 | } |
1302 | inode->i_fop = files[i].ops; | |
6174eafc | 1303 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1304 | d_add(dentry, inode); |
1305 | } | |
1306 | out: | |
1307 | return ret; | |
1da177e4 LT |
1308 | } |
1309 | ||
1872981b | 1310 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1311 | size_t count, loff_t *ppos) |
1312 | { | |
1313 | struct inode *inode; | |
1314 | char *con; | |
1315 | u32 sid, len; | |
1316 | ssize_t ret; | |
1317 | ||
1318 | inode = file->f_path.dentry->d_inode; | |
1319 | sid = inode->i_ino&SEL_INO_MASK; | |
1320 | ret = security_sid_to_context(sid, &con, &len); | |
1321 | if (ret < 0) | |
1322 | return ret; | |
1323 | ||
1324 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1325 | kfree(con); | |
1326 | return ret; | |
1327 | } | |
1328 | ||
1329 | static const struct file_operations sel_initcon_ops = { | |
1330 | .read = sel_read_initcon, | |
1331 | }; | |
1332 | ||
1333 | static int sel_make_initcon_files(struct dentry *dir) | |
1334 | { | |
1335 | int i, ret = 0; | |
1336 | ||
1337 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1338 | struct inode *inode; | |
1339 | struct dentry *dentry; | |
1340 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1341 | if (!dentry) { | |
1342 | ret = -ENOMEM; | |
1343 | goto out; | |
1344 | } | |
1345 | ||
1346 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1347 | if (!inode) { | |
1348 | ret = -ENOMEM; | |
1349 | goto out; | |
1350 | } | |
1351 | inode->i_fop = &sel_initcon_ops; | |
1352 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1353 | d_add(dentry, inode); | |
1354 | } | |
1355 | out: | |
1356 | return ret; | |
1357 | } | |
1358 | ||
e47c8fc5 CP |
1359 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1360 | { | |
1361 | return a / b - (a % b < 0); | |
1362 | } | |
1363 | ||
1364 | static inline unsigned long sel_class_to_ino(u16 class) | |
1365 | { | |
1366 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1367 | } | |
1368 | ||
1369 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1370 | { | |
1371 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1372 | } | |
1373 | ||
1374 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1375 | { | |
1376 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1377 | } | |
1378 | ||
1379 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1380 | { | |
1381 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1382 | } | |
1383 | ||
1872981b | 1384 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1385 | size_t count, loff_t *ppos) |
1386 | { | |
1387 | ssize_t rc, len; | |
1388 | char *page; | |
1389 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1390 | ||
1391 | page = (char *)__get_free_page(GFP_KERNEL); | |
1392 | if (!page) { | |
1393 | rc = -ENOMEM; | |
1394 | goto out; | |
1395 | } | |
1396 | ||
1397 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1398 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1399 | free_page((unsigned long)page); | |
1400 | out: | |
1401 | return rc; | |
1402 | } | |
1403 | ||
1404 | static const struct file_operations sel_class_ops = { | |
1405 | .read = sel_read_class, | |
1406 | }; | |
1407 | ||
1872981b | 1408 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1409 | size_t count, loff_t *ppos) |
1410 | { | |
1411 | ssize_t rc, len; | |
1412 | char *page; | |
1413 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1414 | ||
1415 | page = (char *)__get_free_page(GFP_KERNEL); | |
1416 | if (!page) { | |
1417 | rc = -ENOMEM; | |
1418 | goto out; | |
1419 | } | |
1420 | ||
1872981b | 1421 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
e47c8fc5 CP |
1422 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
1423 | free_page((unsigned long)page); | |
1424 | out: | |
1425 | return rc; | |
1426 | } | |
1427 | ||
1428 | static const struct file_operations sel_perm_ops = { | |
1429 | .read = sel_read_perm, | |
1430 | }; | |
1431 | ||
3bb56b25 PM |
1432 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1433 | size_t count, loff_t *ppos) | |
1434 | { | |
1435 | int value; | |
1436 | char tmpbuf[TMPBUFLEN]; | |
1437 | ssize_t length; | |
1438 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1439 | ||
1440 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1441 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1442 | ||
1443 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1444 | } | |
1445 | ||
1446 | static const struct file_operations sel_policycap_ops = { | |
1447 | .read = sel_read_policycap, | |
1448 | }; | |
1449 | ||
e47c8fc5 CP |
1450 | static int sel_make_perm_files(char *objclass, int classvalue, |
1451 | struct dentry *dir) | |
1452 | { | |
1453 | int i, rc = 0, nperms; | |
1454 | char **perms; | |
1455 | ||
1456 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1457 | if (rc) | |
1458 | goto out; | |
1459 | ||
1460 | for (i = 0; i < nperms; i++) { | |
1461 | struct inode *inode; | |
1462 | struct dentry *dentry; | |
1463 | ||
1464 | dentry = d_alloc_name(dir, perms[i]); | |
1465 | if (!dentry) { | |
1466 | rc = -ENOMEM; | |
1467 | goto out1; | |
1468 | } | |
1469 | ||
1470 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1471 | if (!inode) { | |
1472 | rc = -ENOMEM; | |
1473 | goto out1; | |
1474 | } | |
1475 | inode->i_fop = &sel_perm_ops; | |
1476 | /* i+1 since perm values are 1-indexed */ | |
1477 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1478 | d_add(dentry, inode); | |
1479 | } | |
1480 | ||
1481 | out1: | |
1482 | for (i = 0; i < nperms; i++) | |
1483 | kfree(perms[i]); | |
1484 | kfree(perms); | |
1485 | out: | |
1486 | return rc; | |
1487 | } | |
1488 | ||
1489 | static int sel_make_class_dir_entries(char *classname, int index, | |
1490 | struct dentry *dir) | |
1491 | { | |
1492 | struct dentry *dentry = NULL; | |
1493 | struct inode *inode = NULL; | |
1494 | int rc; | |
1495 | ||
1496 | dentry = d_alloc_name(dir, "index"); | |
1497 | if (!dentry) { | |
1498 | rc = -ENOMEM; | |
1499 | goto out; | |
1500 | } | |
1501 | ||
1502 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1503 | if (!inode) { | |
1504 | rc = -ENOMEM; | |
1505 | goto out; | |
1506 | } | |
1507 | ||
1508 | inode->i_fop = &sel_class_ops; | |
1509 | inode->i_ino = sel_class_to_ino(index); | |
1510 | d_add(dentry, inode); | |
1511 | ||
1512 | dentry = d_alloc_name(dir, "perms"); | |
1513 | if (!dentry) { | |
1514 | rc = -ENOMEM; | |
1515 | goto out; | |
1516 | } | |
1517 | ||
1518 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1519 | if (rc) | |
1520 | goto out; | |
1521 | ||
1522 | rc = sel_make_perm_files(classname, index, dentry); | |
1523 | ||
1524 | out: | |
1525 | return rc; | |
1526 | } | |
1527 | ||
1528 | static void sel_remove_classes(void) | |
1529 | { | |
1530 | struct list_head *class_node; | |
1531 | ||
1532 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1533 | struct dentry *class_subdir = list_entry(class_node, | |
1534 | struct dentry, d_u.d_child); | |
1535 | struct list_head *class_subdir_node; | |
1536 | ||
1537 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1538 | struct dentry *d = list_entry(class_subdir_node, | |
1539 | struct dentry, d_u.d_child); | |
1540 | ||
1541 | if (d->d_inode) | |
1542 | if (d->d_inode->i_mode & S_IFDIR) | |
1543 | sel_remove_entries(d); | |
1544 | } | |
1545 | ||
1546 | sel_remove_entries(class_subdir); | |
1547 | } | |
1548 | ||
1549 | sel_remove_entries(class_dir); | |
1550 | } | |
1551 | ||
1552 | static int sel_make_classes(void) | |
1553 | { | |
1554 | int rc = 0, nclasses, i; | |
1555 | char **classes; | |
1556 | ||
1557 | /* delete any existing entries */ | |
1558 | sel_remove_classes(); | |
1559 | ||
1560 | rc = security_get_classes(&classes, &nclasses); | |
1561 | if (rc < 0) | |
1562 | goto out; | |
1563 | ||
1564 | /* +2 since classes are 1-indexed */ | |
1565 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1566 | ||
1567 | for (i = 0; i < nclasses; i++) { | |
1568 | struct dentry *class_name_dir; | |
1569 | ||
1570 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1571 | if (!class_name_dir) { | |
1572 | rc = -ENOMEM; | |
1573 | goto out1; | |
1574 | } | |
1575 | ||
1576 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1577 | &last_class_ino); | |
1578 | if (rc) | |
1579 | goto out1; | |
1580 | ||
1581 | /* i+1 since class values are 1-indexed */ | |
1582 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1583 | class_name_dir); | |
1584 | if (rc) | |
1585 | goto out1; | |
1586 | } | |
1587 | ||
1588 | out1: | |
1589 | for (i = 0; i < nclasses; i++) | |
1590 | kfree(classes[i]); | |
1591 | kfree(classes); | |
1592 | out: | |
1593 | return rc; | |
1594 | } | |
1595 | ||
3bb56b25 PM |
1596 | static int sel_make_policycap(void) |
1597 | { | |
1598 | unsigned int iter; | |
1599 | struct dentry *dentry = NULL; | |
1600 | struct inode *inode = NULL; | |
1601 | ||
1602 | sel_remove_entries(policycap_dir); | |
1603 | ||
1604 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1605 | if (iter < ARRAY_SIZE(policycap_names)) | |
1606 | dentry = d_alloc_name(policycap_dir, | |
1607 | policycap_names[iter]); | |
1608 | else | |
1609 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1610 | ||
1611 | if (dentry == NULL) | |
1612 | return -ENOMEM; | |
1613 | ||
1614 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1615 | if (inode == NULL) | |
1616 | return -ENOMEM; | |
1617 | ||
1618 | inode->i_fop = &sel_policycap_ops; | |
1619 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1620 | d_add(dentry, inode); | |
1621 | } | |
1622 | ||
1623 | return 0; | |
1624 | } | |
1625 | ||
0dd4ae51 CP |
1626 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1627 | unsigned long *ino) | |
1da177e4 LT |
1628 | { |
1629 | int ret = 0; | |
1630 | struct inode *inode; | |
1631 | ||
edb20fb5 | 1632 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1633 | if (!inode) { |
1634 | ret = -ENOMEM; | |
1635 | goto out; | |
1636 | } | |
1637 | inode->i_op = &simple_dir_inode_operations; | |
1638 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1639 | inode->i_ino = ++(*ino); |
40e906f8 | 1640 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1641 | inc_nlink(inode); |
1da177e4 | 1642 | d_add(dentry, inode); |
edb20fb5 | 1643 | /* bump link count on parent directory, too */ |
d8c76e6f | 1644 | inc_nlink(dir); |
1da177e4 LT |
1645 | out: |
1646 | return ret; | |
1647 | } | |
1648 | ||
1872981b | 1649 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 LT |
1650 | { |
1651 | int ret; | |
1652 | struct dentry *dentry; | |
edb20fb5 | 1653 | struct inode *inode, *root_inode; |
1da177e4 LT |
1654 | struct inode_security_struct *isec; |
1655 | ||
1656 | static struct tree_descr selinux_files[] = { | |
1657 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1658 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1659 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1660 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1661 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1662 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1663 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1664 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1665 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1666 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1667 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1668 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1669 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1670 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1671 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1672 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1673 | /* last one */ {""} |
1674 | }; | |
1675 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1676 | if (ret) | |
161ce45a | 1677 | goto err; |
1da177e4 | 1678 | |
edb20fb5 JM |
1679 | root_inode = sb->s_root->d_inode; |
1680 | ||
1da177e4 | 1681 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1682 | if (!dentry) { |
1683 | ret = -ENOMEM; | |
1684 | goto err; | |
1685 | } | |
1da177e4 | 1686 | |
0dd4ae51 | 1687 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1688 | if (ret) |
161ce45a | 1689 | goto err; |
cde174a8 | 1690 | |
1da177e4 | 1691 | bool_dir = dentry; |
1da177e4 LT |
1692 | |
1693 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1694 | if (!dentry) { |
1695 | ret = -ENOMEM; | |
1696 | goto err; | |
1697 | } | |
1da177e4 LT |
1698 | |
1699 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1700 | if (!inode) { |
1701 | ret = -ENOMEM; | |
1702 | goto err; | |
1703 | } | |
6174eafc | 1704 | inode->i_ino = ++sel_last_ino; |
1872981b | 1705 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1706 | isec->sid = SECINITSID_DEVNULL; |
1707 | isec->sclass = SECCLASS_CHR_FILE; | |
1708 | isec->initialized = 1; | |
1709 | ||
1710 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1711 | d_add(dentry, inode); | |
1712 | selinux_null = dentry; | |
1713 | ||
1714 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1715 | if (!dentry) { |
1716 | ret = -ENOMEM; | |
1717 | goto err; | |
1718 | } | |
1da177e4 | 1719 | |
0dd4ae51 | 1720 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1721 | if (ret) |
161ce45a | 1722 | goto err; |
1da177e4 LT |
1723 | |
1724 | ret = sel_make_avc_files(dentry); | |
1725 | if (ret) | |
161ce45a | 1726 | goto err; |
f0ee2e46 JC |
1727 | |
1728 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1729 | if (!dentry) { | |
1730 | ret = -ENOMEM; | |
1731 | goto err; | |
1732 | } | |
1733 | ||
0dd4ae51 | 1734 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1735 | if (ret) |
1736 | goto err; | |
1737 | ||
1738 | ret = sel_make_initcon_files(dentry); | |
1739 | if (ret) | |
1740 | goto err; | |
1741 | ||
e47c8fc5 CP |
1742 | dentry = d_alloc_name(sb->s_root, "class"); |
1743 | if (!dentry) { | |
1744 | ret = -ENOMEM; | |
1745 | goto err; | |
1746 | } | |
1747 | ||
1748 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1749 | if (ret) | |
1750 | goto err; | |
1751 | ||
1752 | class_dir = dentry; | |
1753 | ||
3bb56b25 PM |
1754 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1755 | if (!dentry) { | |
1756 | ret = -ENOMEM; | |
1757 | goto err; | |
1758 | } | |
1759 | ||
1760 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1761 | if (ret) | |
1762 | goto err; | |
1763 | ||
1764 | policycap_dir = dentry; | |
1765 | ||
1da177e4 | 1766 | out: |
161ce45a JM |
1767 | return ret; |
1768 | err: | |
744ba35e EP |
1769 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1770 | __func__); | |
161ce45a | 1771 | goto out; |
1da177e4 LT |
1772 | } |
1773 | ||
454e2398 DH |
1774 | static int sel_get_sb(struct file_system_type *fs_type, |
1775 | int flags, const char *dev_name, void *data, | |
1776 | struct vfsmount *mnt) | |
1da177e4 | 1777 | { |
454e2398 | 1778 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1779 | } |
1780 | ||
1781 | static struct file_system_type sel_fs_type = { | |
1782 | .name = "selinuxfs", | |
1783 | .get_sb = sel_get_sb, | |
1784 | .kill_sb = kill_litter_super, | |
1785 | }; | |
1786 | ||
1787 | struct vfsmount *selinuxfs_mount; | |
1788 | ||
1789 | static int __init init_sel_fs(void) | |
1790 | { | |
1791 | int err; | |
1792 | ||
1793 | if (!selinux_enabled) | |
1794 | return 0; | |
1795 | err = register_filesystem(&sel_fs_type); | |
1796 | if (!err) { | |
1797 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1798 | if (IS_ERR(selinuxfs_mount)) { | |
1799 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1800 | err = PTR_ERR(selinuxfs_mount); | |
1801 | selinuxfs_mount = NULL; | |
1802 | } | |
1803 | } | |
1804 | return err; | |
1805 | } | |
1806 | ||
1807 | __initcall(init_sel_fs); | |
1808 | ||
1809 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1810 | void exit_sel_fs(void) | |
1811 | { | |
1812 | unregister_filesystem(&sel_fs_type); | |
1813 | } | |
1814 | #endif |