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 | ||
50 | static int __init checkreqprot_setup(char *str) | |
51 | { | |
f5269710 EP |
52 | unsigned long checkreqprot; |
53 | if (!strict_strtoul(str, 0, &checkreqprot)) | |
54 | selinux_checkreqprot = checkreqprot ? 1 : 0; | |
1da177e4 LT |
55 | return 1; |
56 | } | |
57 | __setup("checkreqprot=", checkreqprot_setup); | |
58 | ||
bb003079 | 59 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
60 | |
61 | /* global data for booleans */ | |
1872981b EP |
62 | static struct dentry *bool_dir; |
63 | static int bool_num; | |
d313f948 | 64 | static char **bool_pending_names; |
1872981b | 65 | static int *bool_pending_values; |
1da177e4 | 66 | |
e47c8fc5 | 67 | /* global data for classes */ |
1872981b | 68 | static struct dentry *class_dir; |
e47c8fc5 CP |
69 | static unsigned long last_class_ino; |
70 | ||
3bb56b25 | 71 | /* global data for policy capabilities */ |
1872981b | 72 | static struct dentry *policycap_dir; |
3bb56b25 | 73 | |
1da177e4 LT |
74 | extern void selnl_notify_setenforce(int val); |
75 | ||
76 | /* Check whether a task is allowed to use a security operation. */ | |
77 | static int task_has_security(struct task_struct *tsk, | |
78 | u32 perms) | |
79 | { | |
c69e8d9c DH |
80 | const struct task_security_struct *tsec; |
81 | u32 sid = 0; | |
82 | ||
83 | rcu_read_lock(); | |
84 | tsec = __task_cred(tsk)->security; | |
85 | if (tsec) | |
86 | sid = tsec->sid; | |
87 | rcu_read_unlock(); | |
1da177e4 LT |
88 | if (!tsec) |
89 | return -EACCES; | |
90 | ||
c69e8d9c | 91 | return avc_has_perm(sid, SECINITSID_SECURITY, |
1da177e4 LT |
92 | SECCLASS_SECURITY, perms, NULL); |
93 | } | |
94 | ||
95 | enum sel_inos { | |
96 | SEL_ROOT_INO = 2, | |
97 | SEL_LOAD, /* load policy */ | |
98 | SEL_ENFORCE, /* get or set enforcing status */ | |
99 | SEL_CONTEXT, /* validate context */ | |
100 | SEL_ACCESS, /* compute access decision */ | |
101 | SEL_CREATE, /* compute create labeling decision */ | |
102 | SEL_RELABEL, /* compute relabeling decision */ | |
103 | SEL_USER, /* compute reachable user contexts */ | |
104 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
105 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
106 | SEL_MLS, /* return if MLS policy is enabled */ | |
107 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
108 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
109 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 110 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
111 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
112 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 113 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
114 | }; |
115 | ||
6174eafc JC |
116 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
117 | ||
3bb56b25 PM |
118 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
119 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
120 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
121 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
122 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 123 | |
1da177e4 LT |
124 | #define TMPBUFLEN 12 |
125 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
126 | size_t count, loff_t *ppos) | |
127 | { | |
128 | char tmpbuf[TMPBUFLEN]; | |
129 | ssize_t length; | |
130 | ||
131 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
132 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
133 | } | |
134 | ||
135 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
1872981b | 136 | static ssize_t sel_write_enforce(struct file *file, const char __user *buf, |
1da177e4 LT |
137 | size_t count, loff_t *ppos) |
138 | ||
139 | { | |
140 | char *page; | |
141 | ssize_t length; | |
142 | int new_value; | |
143 | ||
bfd51626 | 144 | if (count >= PAGE_SIZE) |
1da177e4 LT |
145 | return -ENOMEM; |
146 | if (*ppos != 0) { | |
147 | /* No partial writes. */ | |
148 | return -EINVAL; | |
149 | } | |
1872981b | 150 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
151 | if (!page) |
152 | return -ENOMEM; | |
153 | length = -EFAULT; | |
154 | if (copy_from_user(page, buf, count)) | |
155 | goto out; | |
156 | ||
157 | length = -EINVAL; | |
158 | if (sscanf(page, "%d", &new_value) != 1) | |
159 | goto out; | |
160 | ||
161 | if (new_value != selinux_enforcing) { | |
162 | length = task_has_security(current, SECURITY__SETENFORCE); | |
163 | if (length) | |
164 | goto out; | |
af601e46 | 165 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
166 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
167 | new_value, selinux_enforcing, | |
168 | audit_get_loginuid(current), | |
169 | audit_get_sessionid(current)); | |
1da177e4 LT |
170 | selinux_enforcing = new_value; |
171 | if (selinux_enforcing) | |
172 | avc_ss_reset(0); | |
173 | selnl_notify_setenforce(selinux_enforcing); | |
174 | } | |
175 | length = count; | |
176 | out: | |
177 | free_page((unsigned long) page); | |
178 | return length; | |
179 | } | |
180 | #else | |
181 | #define sel_write_enforce NULL | |
182 | #endif | |
183 | ||
9c2e08c5 | 184 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
185 | .read = sel_read_enforce, |
186 | .write = sel_write_enforce, | |
187 | }; | |
188 | ||
3f12070e EP |
189 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
190 | size_t count, loff_t *ppos) | |
191 | { | |
192 | char tmpbuf[TMPBUFLEN]; | |
193 | ssize_t length; | |
194 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
195 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
196 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
197 | ||
198 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
199 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
200 | } | |
201 | ||
202 | static const struct file_operations sel_handle_unknown_ops = { | |
203 | .read = sel_read_handle_unknown, | |
204 | }; | |
205 | ||
1da177e4 | 206 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1872981b | 207 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
1da177e4 LT |
208 | size_t count, loff_t *ppos) |
209 | ||
210 | { | |
211 | char *page; | |
212 | ssize_t length; | |
213 | int new_value; | |
214 | extern int selinux_disable(void); | |
215 | ||
bfd51626 | 216 | if (count >= PAGE_SIZE) |
1da177e4 LT |
217 | return -ENOMEM; |
218 | if (*ppos != 0) { | |
219 | /* No partial writes. */ | |
220 | return -EINVAL; | |
221 | } | |
1872981b | 222 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
223 | if (!page) |
224 | return -ENOMEM; | |
225 | length = -EFAULT; | |
226 | if (copy_from_user(page, buf, count)) | |
227 | goto out; | |
228 | ||
229 | length = -EINVAL; | |
230 | if (sscanf(page, "%d", &new_value) != 1) | |
231 | goto out; | |
232 | ||
233 | if (new_value) { | |
234 | length = selinux_disable(); | |
235 | if (length < 0) | |
236 | goto out; | |
af601e46 | 237 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
238 | "selinux=0 auid=%u ses=%u", |
239 | audit_get_loginuid(current), | |
240 | audit_get_sessionid(current)); | |
1da177e4 LT |
241 | } |
242 | ||
243 | length = count; | |
244 | out: | |
245 | free_page((unsigned long) page); | |
246 | return length; | |
247 | } | |
248 | #else | |
249 | #define sel_write_disable NULL | |
250 | #endif | |
251 | ||
9c2e08c5 | 252 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
253 | .write = sel_write_disable, |
254 | }; | |
255 | ||
256 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
1872981b | 257 | size_t count, loff_t *ppos) |
1da177e4 LT |
258 | { |
259 | char tmpbuf[TMPBUFLEN]; | |
260 | ssize_t length; | |
261 | ||
262 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
263 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
264 | } | |
265 | ||
9c2e08c5 | 266 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
267 | .read = sel_read_policyvers, |
268 | }; | |
269 | ||
270 | /* declaration for sel_write_load */ | |
271 | static int sel_make_bools(void); | |
e47c8fc5 | 272 | static int sel_make_classes(void); |
3bb56b25 | 273 | static int sel_make_policycap(void); |
e47c8fc5 CP |
274 | |
275 | /* declaration for sel_make_class_dirs */ | |
276 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
277 | unsigned long *ino); | |
1da177e4 LT |
278 | |
279 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
280 | size_t count, loff_t *ppos) | |
281 | { | |
282 | char tmpbuf[TMPBUFLEN]; | |
283 | ssize_t length; | |
284 | ||
285 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
286 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
287 | } | |
288 | ||
9c2e08c5 | 289 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
290 | .read = sel_read_mls, |
291 | }; | |
292 | ||
1872981b | 293 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
294 | size_t count, loff_t *ppos) |
295 | ||
296 | { | |
297 | int ret; | |
298 | ssize_t length; | |
299 | void *data = NULL; | |
300 | ||
bb003079 | 301 | mutex_lock(&sel_mutex); |
1da177e4 LT |
302 | |
303 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
304 | if (length) | |
305 | goto out; | |
306 | ||
307 | if (*ppos != 0) { | |
308 | /* No partial writes. */ | |
309 | length = -EINVAL; | |
310 | goto out; | |
311 | } | |
312 | ||
bfd51626 | 313 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
314 | || (data = vmalloc(count)) == NULL) { |
315 | length = -ENOMEM; | |
316 | goto out; | |
317 | } | |
318 | ||
319 | length = -EFAULT; | |
320 | if (copy_from_user(data, buf, count) != 0) | |
321 | goto out; | |
322 | ||
323 | length = security_load_policy(data, count); | |
324 | if (length) | |
325 | goto out; | |
326 | ||
327 | ret = sel_make_bools(); | |
e47c8fc5 CP |
328 | if (ret) { |
329 | length = ret; | |
330 | goto out1; | |
331 | } | |
332 | ||
333 | ret = sel_make_classes(); | |
3bb56b25 PM |
334 | if (ret) { |
335 | length = ret; | |
336 | goto out1; | |
337 | } | |
338 | ||
339 | ret = sel_make_policycap(); | |
1da177e4 LT |
340 | if (ret) |
341 | length = ret; | |
342 | else | |
343 | length = count; | |
e47c8fc5 CP |
344 | |
345 | out1: | |
af601e46 | 346 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
347 | "policy loaded auid=%u ses=%u", |
348 | audit_get_loginuid(current), | |
349 | audit_get_sessionid(current)); | |
1da177e4 | 350 | out: |
bb003079 | 351 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
352 | vfree(data); |
353 | return length; | |
354 | } | |
355 | ||
9c2e08c5 | 356 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
357 | .write = sel_write_load, |
358 | }; | |
359 | ||
1872981b | 360 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 361 | { |
ce9982d0 SS |
362 | char *canon; |
363 | u32 sid, len; | |
1da177e4 LT |
364 | ssize_t length; |
365 | ||
366 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
367 | if (length) | |
368 | return length; | |
369 | ||
ce9982d0 SS |
370 | length = security_context_to_sid(buf, size, &sid); |
371 | if (length < 0) | |
372 | return length; | |
1da177e4 | 373 | |
ce9982d0 | 374 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 375 | if (length < 0) |
ce9982d0 SS |
376 | return length; |
377 | ||
378 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
379 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
380 | "payload max\n", __func__, len); | |
ce9982d0 | 381 | length = -ERANGE; |
1da177e4 | 382 | goto out; |
ce9982d0 | 383 | } |
1da177e4 | 384 | |
ce9982d0 SS |
385 | memcpy(buf, canon, len); |
386 | length = len; | |
1da177e4 | 387 | out: |
ce9982d0 | 388 | kfree(canon); |
1da177e4 LT |
389 | return length; |
390 | } | |
391 | ||
1da177e4 LT |
392 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
393 | size_t count, loff_t *ppos) | |
394 | { | |
395 | char tmpbuf[TMPBUFLEN]; | |
396 | ssize_t length; | |
397 | ||
398 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
399 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
400 | } | |
401 | ||
1872981b | 402 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
403 | size_t count, loff_t *ppos) |
404 | { | |
405 | char *page; | |
406 | ssize_t length; | |
407 | unsigned int new_value; | |
408 | ||
409 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
410 | if (length) | |
411 | return length; | |
412 | ||
bfd51626 | 413 | if (count >= PAGE_SIZE) |
1da177e4 LT |
414 | return -ENOMEM; |
415 | if (*ppos != 0) { | |
416 | /* No partial writes. */ | |
417 | return -EINVAL; | |
418 | } | |
1872981b | 419 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
420 | if (!page) |
421 | return -ENOMEM; | |
422 | length = -EFAULT; | |
423 | if (copy_from_user(page, buf, count)) | |
424 | goto out; | |
425 | ||
426 | length = -EINVAL; | |
427 | if (sscanf(page, "%u", &new_value) != 1) | |
428 | goto out; | |
429 | ||
430 | selinux_checkreqprot = new_value ? 1 : 0; | |
431 | length = count; | |
432 | out: | |
433 | free_page((unsigned long) page); | |
434 | return length; | |
435 | } | |
9c2e08c5 | 436 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
437 | .read = sel_read_checkreqprot, |
438 | .write = sel_write_checkreqprot, | |
439 | }; | |
440 | ||
441 | /* | |
442 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
443 | */ | |
1872981b EP |
444 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
445 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
446 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
447 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
448 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 LT |
449 | |
450 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
451 | [SEL_ACCESS] = sel_write_access, | |
452 | [SEL_CREATE] = sel_write_create, | |
453 | [SEL_RELABEL] = sel_write_relabel, | |
454 | [SEL_USER] = sel_write_user, | |
455 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 456 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
457 | }; |
458 | ||
459 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
460 | { | |
1872981b | 461 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
462 | char *data; |
463 | ssize_t rv; | |
464 | ||
6e20a64a | 465 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
466 | return -EINVAL; |
467 | ||
468 | data = simple_transaction_get(file, buf, size); | |
469 | if (IS_ERR(data)) | |
470 | return PTR_ERR(data); | |
471 | ||
1872981b EP |
472 | rv = write_op[ino](file, data, size); |
473 | if (rv > 0) { | |
1da177e4 LT |
474 | simple_transaction_set(file, rv); |
475 | rv = size; | |
476 | } | |
477 | return rv; | |
478 | } | |
479 | ||
9c2e08c5 | 480 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
481 | .write = selinux_transaction_write, |
482 | .read = simple_transaction_read, | |
483 | .release = simple_transaction_release, | |
484 | }; | |
485 | ||
486 | /* | |
487 | * payload - write methods | |
488 | * If the method has a response, the response should be put in buf, | |
489 | * and the length returned. Otherwise return 0 or and -error. | |
490 | */ | |
491 | ||
1872981b | 492 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 LT |
493 | { |
494 | char *scon, *tcon; | |
495 | u32 ssid, tsid; | |
496 | u16 tclass; | |
497 | u32 req; | |
498 | struct av_decision avd; | |
499 | ssize_t length; | |
500 | ||
501 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
502 | if (length) | |
503 | return length; | |
504 | ||
505 | length = -ENOMEM; | |
89d155ef | 506 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
507 | if (!scon) |
508 | return length; | |
1da177e4 | 509 | |
89d155ef | 510 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
511 | if (!tcon) |
512 | goto out; | |
1da177e4 LT |
513 | |
514 | length = -EINVAL; | |
515 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
516 | goto out2; | |
517 | ||
518 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
519 | if (length < 0) | |
520 | goto out2; | |
521 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
522 | if (length < 0) | |
523 | goto out2; | |
524 | ||
c6d3aaa4 | 525 | length = security_compute_av_user(ssid, tsid, tclass, req, &avd); |
1da177e4 LT |
526 | if (length < 0) |
527 | goto out2; | |
528 | ||
529 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
8a6f83af | 530 | "%x %x %x %x %u %x", |
f1c6381a | 531 | avd.allowed, 0xffffffff, |
1da177e4 | 532 | avd.auditallow, avd.auditdeny, |
8a6f83af | 533 | avd.seqno, avd.flags); |
1da177e4 LT |
534 | out2: |
535 | kfree(tcon); | |
536 | out: | |
537 | kfree(scon); | |
538 | return length; | |
539 | } | |
540 | ||
1872981b | 541 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 LT |
542 | { |
543 | char *scon, *tcon; | |
544 | u32 ssid, tsid, newsid; | |
545 | u16 tclass; | |
546 | ssize_t length; | |
547 | char *newcon; | |
548 | u32 len; | |
549 | ||
550 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
551 | if (length) | |
552 | return length; | |
553 | ||
554 | length = -ENOMEM; | |
89d155ef | 555 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
556 | if (!scon) |
557 | return length; | |
1da177e4 | 558 | |
89d155ef | 559 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
560 | if (!tcon) |
561 | goto out; | |
1da177e4 LT |
562 | |
563 | length = -EINVAL; | |
564 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
565 | goto out2; | |
566 | ||
567 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
568 | if (length < 0) | |
569 | goto out2; | |
570 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
571 | if (length < 0) | |
572 | goto out2; | |
573 | ||
c6d3aaa4 | 574 | length = security_transition_sid_user(ssid, tsid, tclass, &newsid); |
1da177e4 LT |
575 | if (length < 0) |
576 | goto out2; | |
577 | ||
578 | length = security_sid_to_context(newsid, &newcon, &len); | |
579 | if (length < 0) | |
580 | goto out2; | |
581 | ||
582 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
583 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
584 | "payload max\n", __func__, len); | |
1da177e4 LT |
585 | length = -ERANGE; |
586 | goto out3; | |
587 | } | |
588 | ||
589 | memcpy(buf, newcon, len); | |
590 | length = len; | |
591 | out3: | |
592 | kfree(newcon); | |
593 | out2: | |
594 | kfree(tcon); | |
595 | out: | |
596 | kfree(scon); | |
597 | return length; | |
598 | } | |
599 | ||
1872981b | 600 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 LT |
601 | { |
602 | char *scon, *tcon; | |
603 | u32 ssid, tsid, newsid; | |
604 | u16 tclass; | |
605 | ssize_t length; | |
606 | char *newcon; | |
607 | u32 len; | |
608 | ||
609 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
610 | if (length) | |
611 | return length; | |
612 | ||
613 | length = -ENOMEM; | |
89d155ef | 614 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
615 | if (!scon) |
616 | return length; | |
1da177e4 | 617 | |
89d155ef | 618 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
619 | if (!tcon) |
620 | goto out; | |
1da177e4 LT |
621 | |
622 | length = -EINVAL; | |
623 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
624 | goto out2; | |
625 | ||
626 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
627 | if (length < 0) | |
628 | goto out2; | |
629 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
630 | if (length < 0) | |
631 | goto out2; | |
632 | ||
633 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
634 | if (length < 0) | |
635 | goto out2; | |
636 | ||
637 | length = security_sid_to_context(newsid, &newcon, &len); | |
638 | if (length < 0) | |
639 | goto out2; | |
640 | ||
641 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
642 | length = -ERANGE; | |
643 | goto out3; | |
644 | } | |
645 | ||
646 | memcpy(buf, newcon, len); | |
647 | length = len; | |
648 | out3: | |
649 | kfree(newcon); | |
650 | out2: | |
651 | kfree(tcon); | |
652 | out: | |
653 | kfree(scon); | |
654 | return length; | |
655 | } | |
656 | ||
1872981b | 657 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 LT |
658 | { |
659 | char *con, *user, *ptr; | |
660 | u32 sid, *sids; | |
661 | ssize_t length; | |
662 | char *newcon; | |
663 | int i, rc; | |
664 | u32 len, nsids; | |
665 | ||
666 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
667 | if (length) | |
668 | return length; | |
669 | ||
670 | length = -ENOMEM; | |
89d155ef | 671 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
672 | if (!con) |
673 | return length; | |
1da177e4 | 674 | |
89d155ef | 675 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
676 | if (!user) |
677 | goto out; | |
1da177e4 LT |
678 | |
679 | length = -EINVAL; | |
680 | if (sscanf(buf, "%s %s", con, user) != 2) | |
681 | goto out2; | |
682 | ||
683 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
684 | if (length < 0) | |
685 | goto out2; | |
686 | ||
687 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
688 | if (length < 0) | |
689 | goto out2; | |
690 | ||
691 | length = sprintf(buf, "%u", nsids) + 1; | |
692 | ptr = buf + length; | |
693 | for (i = 0; i < nsids; i++) { | |
694 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
695 | if (rc) { | |
696 | length = rc; | |
697 | goto out3; | |
698 | } | |
699 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
700 | kfree(newcon); | |
701 | length = -ERANGE; | |
702 | goto out3; | |
703 | } | |
704 | memcpy(ptr, newcon, len); | |
705 | kfree(newcon); | |
706 | ptr += len; | |
707 | length += len; | |
708 | } | |
709 | out3: | |
710 | kfree(sids); | |
711 | out2: | |
712 | kfree(user); | |
713 | out: | |
714 | kfree(con); | |
715 | return length; | |
716 | } | |
717 | ||
1872981b | 718 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 LT |
719 | { |
720 | char *scon, *tcon; | |
721 | u32 ssid, tsid, newsid; | |
722 | u16 tclass; | |
723 | ssize_t length; | |
724 | char *newcon; | |
725 | u32 len; | |
726 | ||
727 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
728 | if (length) | |
729 | return length; | |
730 | ||
731 | length = -ENOMEM; | |
89d155ef | 732 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
733 | if (!scon) |
734 | return length; | |
1da177e4 | 735 | |
89d155ef | 736 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
737 | if (!tcon) |
738 | goto out; | |
1da177e4 LT |
739 | |
740 | length = -EINVAL; | |
741 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
742 | goto out2; | |
743 | ||
744 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
745 | if (length < 0) | |
746 | goto out2; | |
747 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
748 | if (length < 0) | |
749 | goto out2; | |
750 | ||
751 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
752 | if (length < 0) | |
753 | goto out2; | |
754 | ||
755 | length = security_sid_to_context(newsid, &newcon, &len); | |
756 | if (length < 0) | |
757 | goto out2; | |
758 | ||
759 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
760 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
761 | "payload max\n", __func__, len); | |
1da177e4 LT |
762 | length = -ERANGE; |
763 | goto out3; | |
764 | } | |
765 | ||
766 | memcpy(buf, newcon, len); | |
767 | length = len; | |
768 | out3: | |
769 | kfree(newcon); | |
770 | out2: | |
771 | kfree(tcon); | |
772 | out: | |
773 | kfree(scon); | |
774 | return length; | |
775 | } | |
776 | ||
777 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
778 | { | |
779 | struct inode *ret = new_inode(sb); | |
780 | ||
781 | if (ret) { | |
782 | ret->i_mode = mode; | |
1da177e4 LT |
783 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
784 | } | |
785 | return ret; | |
786 | } | |
787 | ||
1da177e4 LT |
788 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
789 | size_t count, loff_t *ppos) | |
790 | { | |
791 | char *page = NULL; | |
792 | ssize_t length; | |
1da177e4 LT |
793 | ssize_t ret; |
794 | int cur_enforcing; | |
d313f948 SS |
795 | struct inode *inode = filep->f_path.dentry->d_inode; |
796 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
797 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 798 | |
bb003079 | 799 | mutex_lock(&sel_mutex); |
1da177e4 | 800 | |
d313f948 SS |
801 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
802 | ret = -EINVAL; | |
803 | goto out; | |
804 | } | |
1da177e4 | 805 | |
1872981b EP |
806 | page = (char *)get_zeroed_page(GFP_KERNEL); |
807 | if (!page) { | |
1da177e4 LT |
808 | ret = -ENOMEM; |
809 | goto out; | |
810 | } | |
811 | ||
d313f948 | 812 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
813 | if (cur_enforcing < 0) { |
814 | ret = cur_enforcing; | |
815 | goto out; | |
816 | } | |
1da177e4 | 817 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 818 | bool_pending_values[index]); |
68bdcf28 | 819 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 820 | out: |
bb003079 | 821 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
822 | if (page) |
823 | free_page((unsigned long)page); | |
824 | return ret; | |
825 | } | |
826 | ||
827 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
828 | size_t count, loff_t *ppos) | |
829 | { | |
830 | char *page = NULL; | |
d313f948 | 831 | ssize_t length; |
1da177e4 | 832 | int new_value; |
d313f948 SS |
833 | struct inode *inode = filep->f_path.dentry->d_inode; |
834 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
835 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 836 | |
bb003079 | 837 | mutex_lock(&sel_mutex); |
1da177e4 LT |
838 | |
839 | length = task_has_security(current, SECURITY__SETBOOL); | |
840 | if (length) | |
841 | goto out; | |
842 | ||
d313f948 SS |
843 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
844 | length = -EINVAL; | |
845 | goto out; | |
846 | } | |
847 | ||
bfd51626 | 848 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
849 | length = -ENOMEM; |
850 | goto out; | |
851 | } | |
d313f948 | 852 | |
1da177e4 LT |
853 | if (*ppos != 0) { |
854 | /* No partial writes. */ | |
d313f948 | 855 | length = -EINVAL; |
1da177e4 LT |
856 | goto out; |
857 | } | |
1872981b | 858 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
859 | if (!page) { |
860 | length = -ENOMEM; | |
861 | goto out; | |
862 | } | |
863 | ||
d313f948 | 864 | length = -EFAULT; |
1da177e4 LT |
865 | if (copy_from_user(page, buf, count)) |
866 | goto out; | |
867 | ||
868 | length = -EINVAL; | |
869 | if (sscanf(page, "%d", &new_value) != 1) | |
870 | goto out; | |
871 | ||
872 | if (new_value) | |
873 | new_value = 1; | |
874 | ||
d313f948 | 875 | bool_pending_values[index] = new_value; |
1da177e4 LT |
876 | length = count; |
877 | ||
878 | out: | |
bb003079 | 879 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
880 | if (page) |
881 | free_page((unsigned long) page); | |
882 | return length; | |
883 | } | |
884 | ||
9c2e08c5 | 885 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
886 | .read = sel_read_bool, |
887 | .write = sel_write_bool, | |
1da177e4 LT |
888 | }; |
889 | ||
890 | static ssize_t sel_commit_bools_write(struct file *filep, | |
891 | const char __user *buf, | |
892 | size_t count, loff_t *ppos) | |
893 | { | |
894 | char *page = NULL; | |
d313f948 | 895 | ssize_t length; |
1da177e4 LT |
896 | int new_value; |
897 | ||
bb003079 | 898 | mutex_lock(&sel_mutex); |
1da177e4 LT |
899 | |
900 | length = task_has_security(current, SECURITY__SETBOOL); | |
901 | if (length) | |
902 | goto out; | |
903 | ||
bfd51626 | 904 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
905 | length = -ENOMEM; |
906 | goto out; | |
907 | } | |
908 | if (*ppos != 0) { | |
909 | /* No partial writes. */ | |
910 | goto out; | |
911 | } | |
1872981b | 912 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
913 | if (!page) { |
914 | length = -ENOMEM; | |
915 | goto out; | |
916 | } | |
917 | ||
d313f948 | 918 | length = -EFAULT; |
1da177e4 LT |
919 | if (copy_from_user(page, buf, count)) |
920 | goto out; | |
921 | ||
922 | length = -EINVAL; | |
923 | if (sscanf(page, "%d", &new_value) != 1) | |
924 | goto out; | |
925 | ||
1872981b | 926 | if (new_value && bool_pending_values) |
1da177e4 | 927 | security_set_bools(bool_num, bool_pending_values); |
1da177e4 LT |
928 | |
929 | length = count; | |
930 | ||
931 | out: | |
bb003079 | 932 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
933 | if (page) |
934 | free_page((unsigned long) page); | |
935 | return length; | |
936 | } | |
937 | ||
9c2e08c5 | 938 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 939 | .write = sel_commit_bools_write, |
1da177e4 LT |
940 | }; |
941 | ||
0c92d7c7 | 942 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 943 | { |
0955dc03 | 944 | struct list_head *node; |
1da177e4 LT |
945 | |
946 | spin_lock(&dcache_lock); | |
947 | node = de->d_subdirs.next; | |
948 | while (node != &de->d_subdirs) { | |
5160ee6f | 949 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
950 | list_del_init(node); |
951 | ||
952 | if (d->d_inode) { | |
953 | d = dget_locked(d); | |
954 | spin_unlock(&dcache_lock); | |
955 | d_delete(d); | |
956 | simple_unlink(de->d_inode, d); | |
957 | dput(d); | |
958 | spin_lock(&dcache_lock); | |
959 | } | |
960 | node = de->d_subdirs.next; | |
961 | } | |
962 | ||
963 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
964 | } |
965 | ||
966 | #define BOOL_DIR_NAME "booleans" | |
967 | ||
968 | static int sel_make_bools(void) | |
969 | { | |
970 | int i, ret = 0; | |
971 | ssize_t len; | |
972 | struct dentry *dentry = NULL; | |
973 | struct dentry *dir = bool_dir; | |
974 | struct inode *inode = NULL; | |
975 | struct inode_security_struct *isec; | |
976 | char **names = NULL, *page; | |
977 | int num; | |
978 | int *values = NULL; | |
979 | u32 sid; | |
980 | ||
981 | /* remove any existing files */ | |
d313f948 | 982 | kfree(bool_pending_names); |
9a5f04bf | 983 | kfree(bool_pending_values); |
d313f948 | 984 | bool_pending_names = NULL; |
20c19e41 | 985 | bool_pending_values = NULL; |
1da177e4 | 986 | |
0c92d7c7 | 987 | sel_remove_entries(dir); |
1da177e4 | 988 | |
1872981b EP |
989 | page = (char *)get_zeroed_page(GFP_KERNEL); |
990 | if (!page) | |
1da177e4 LT |
991 | return -ENOMEM; |
992 | ||
993 | ret = security_get_bools(&num, &names, &values); | |
994 | if (ret != 0) | |
995 | goto out; | |
996 | ||
997 | for (i = 0; i < num; i++) { | |
998 | dentry = d_alloc_name(dir, names[i]); | |
999 | if (!dentry) { | |
1000 | ret = -ENOMEM; | |
1001 | goto err; | |
1002 | } | |
1003 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1004 | if (!inode) { | |
1005 | ret = -ENOMEM; | |
1006 | goto err; | |
1007 | } | |
1008 | ||
1009 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1010 | if (len < 0) { | |
1011 | ret = -EINVAL; | |
1012 | goto err; | |
1013 | } else if (len >= PAGE_SIZE) { | |
1014 | ret = -ENAMETOOLONG; | |
1015 | goto err; | |
1016 | } | |
1872981b EP |
1017 | isec = (struct inode_security_struct *)inode->i_security; |
1018 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); | |
1019 | if (ret) | |
1da177e4 LT |
1020 | goto err; |
1021 | isec->sid = sid; | |
1022 | isec->initialized = 1; | |
1023 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1024 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1025 | d_add(dentry, inode); |
1026 | } | |
1027 | bool_num = num; | |
d313f948 | 1028 | bool_pending_names = names; |
1da177e4 LT |
1029 | bool_pending_values = values; |
1030 | out: | |
1031 | free_page((unsigned long)page); | |
d313f948 SS |
1032 | return ret; |
1033 | err: | |
1da177e4 | 1034 | if (names) { |
9a5f04bf JJ |
1035 | for (i = 0; i < num; i++) |
1036 | kfree(names[i]); | |
1da177e4 LT |
1037 | kfree(names); |
1038 | } | |
20c19e41 | 1039 | kfree(values); |
0c92d7c7 | 1040 | sel_remove_entries(dir); |
1da177e4 LT |
1041 | ret = -ENOMEM; |
1042 | goto out; | |
1043 | } | |
1044 | ||
1045 | #define NULL_FILE_NAME "null" | |
1046 | ||
1872981b | 1047 | struct dentry *selinux_null; |
1da177e4 LT |
1048 | |
1049 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1050 | size_t count, loff_t *ppos) | |
1051 | { | |
1052 | char tmpbuf[TMPBUFLEN]; | |
1053 | ssize_t length; | |
1054 | ||
1055 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1056 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1057 | } | |
1058 | ||
1872981b EP |
1059 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1060 | const char __user *buf, | |
1da177e4 LT |
1061 | size_t count, loff_t *ppos) |
1062 | ||
1063 | { | |
1064 | char *page; | |
1065 | ssize_t ret; | |
1066 | int new_value; | |
1067 | ||
bfd51626 | 1068 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1069 | ret = -ENOMEM; |
1070 | goto out; | |
1071 | } | |
1072 | ||
1073 | if (*ppos != 0) { | |
1074 | /* No partial writes. */ | |
1075 | ret = -EINVAL; | |
1076 | goto out; | |
1077 | } | |
1078 | ||
1872981b | 1079 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
1080 | if (!page) { |
1081 | ret = -ENOMEM; | |
1082 | goto out; | |
1083 | } | |
1084 | ||
1085 | if (copy_from_user(page, buf, count)) { | |
1086 | ret = -EFAULT; | |
1087 | goto out_free; | |
1088 | } | |
1089 | ||
1090 | if (sscanf(page, "%u", &new_value) != 1) { | |
1091 | ret = -EINVAL; | |
1092 | goto out; | |
1093 | } | |
1094 | ||
1095 | if (new_value != avc_cache_threshold) { | |
1096 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1097 | if (ret) | |
1098 | goto out_free; | |
1099 | avc_cache_threshold = new_value; | |
1100 | } | |
1101 | ret = count; | |
1102 | out_free: | |
1103 | free_page((unsigned long)page); | |
1104 | out: | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1109 | size_t count, loff_t *ppos) | |
1110 | { | |
1111 | char *page; | |
1112 | ssize_t ret = 0; | |
1113 | ||
1114 | page = (char *)__get_free_page(GFP_KERNEL); | |
1115 | if (!page) { | |
1116 | ret = -ENOMEM; | |
1117 | goto out; | |
1118 | } | |
1119 | ret = avc_get_hash_stats(page); | |
1120 | if (ret >= 0) | |
1121 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1122 | free_page((unsigned long)page); | |
1123 | out: | |
1124 | return ret; | |
1125 | } | |
1126 | ||
9c2e08c5 | 1127 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1128 | .read = sel_read_avc_cache_threshold, |
1129 | .write = sel_write_avc_cache_threshold, | |
1130 | }; | |
1131 | ||
9c2e08c5 | 1132 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1133 | .read = sel_read_avc_hash_stats, |
1134 | }; | |
1135 | ||
1136 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1137 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1138 | { | |
1139 | int cpu; | |
1140 | ||
4f4b6c1a | 1141 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1142 | if (!cpu_possible(cpu)) |
1143 | continue; | |
1144 | *idx = cpu + 1; | |
1145 | return &per_cpu(avc_cache_stats, cpu); | |
1146 | } | |
1147 | return NULL; | |
1148 | } | |
1149 | ||
1150 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1151 | { | |
1152 | loff_t n = *pos - 1; | |
1153 | ||
1154 | if (*pos == 0) | |
1155 | return SEQ_START_TOKEN; | |
1156 | ||
1157 | return sel_avc_get_stat_idx(&n); | |
1158 | } | |
1159 | ||
1160 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1161 | { | |
1162 | return sel_avc_get_stat_idx(pos); | |
1163 | } | |
1164 | ||
1165 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1166 | { | |
1167 | struct avc_cache_stats *st = v; | |
1168 | ||
1169 | if (v == SEQ_START_TOKEN) | |
1170 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1171 | "frees\n"); | |
1172 | else | |
1173 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1174 | st->hits, st->misses, st->allocations, | |
1175 | st->reclaims, st->frees); | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1180 | { } | |
1181 | ||
1996a109 | 1182 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1183 | .start = sel_avc_stats_seq_start, |
1184 | .next = sel_avc_stats_seq_next, | |
1185 | .show = sel_avc_stats_seq_show, | |
1186 | .stop = sel_avc_stats_seq_stop, | |
1187 | }; | |
1188 | ||
1189 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1190 | { | |
1191 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1192 | } | |
1193 | ||
9c2e08c5 | 1194 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1195 | .open = sel_open_avc_cache_stats, |
1196 | .read = seq_read, | |
1197 | .llseek = seq_lseek, | |
1198 | .release = seq_release, | |
1199 | }; | |
1200 | #endif | |
1201 | ||
1202 | static int sel_make_avc_files(struct dentry *dir) | |
1203 | { | |
1204 | int i, ret = 0; | |
1205 | static struct tree_descr files[] = { | |
1206 | { "cache_threshold", | |
1207 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1208 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1209 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1210 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1211 | #endif | |
1212 | }; | |
1213 | ||
6e20a64a | 1214 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1215 | struct inode *inode; |
1216 | struct dentry *dentry; | |
1217 | ||
1218 | dentry = d_alloc_name(dir, files[i].name); | |
1219 | if (!dentry) { | |
1220 | ret = -ENOMEM; | |
d6aafa65 | 1221 | goto out; |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1225 | if (!inode) { | |
1226 | ret = -ENOMEM; | |
d6aafa65 | 1227 | goto out; |
1da177e4 LT |
1228 | } |
1229 | inode->i_fop = files[i].ops; | |
6174eafc | 1230 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1231 | d_add(dentry, inode); |
1232 | } | |
1233 | out: | |
1234 | return ret; | |
1da177e4 LT |
1235 | } |
1236 | ||
1872981b | 1237 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1238 | size_t count, loff_t *ppos) |
1239 | { | |
1240 | struct inode *inode; | |
1241 | char *con; | |
1242 | u32 sid, len; | |
1243 | ssize_t ret; | |
1244 | ||
1245 | inode = file->f_path.dentry->d_inode; | |
1246 | sid = inode->i_ino&SEL_INO_MASK; | |
1247 | ret = security_sid_to_context(sid, &con, &len); | |
1248 | if (ret < 0) | |
1249 | return ret; | |
1250 | ||
1251 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1252 | kfree(con); | |
1253 | return ret; | |
1254 | } | |
1255 | ||
1256 | static const struct file_operations sel_initcon_ops = { | |
1257 | .read = sel_read_initcon, | |
1258 | }; | |
1259 | ||
1260 | static int sel_make_initcon_files(struct dentry *dir) | |
1261 | { | |
1262 | int i, ret = 0; | |
1263 | ||
1264 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1265 | struct inode *inode; | |
1266 | struct dentry *dentry; | |
1267 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1268 | if (!dentry) { | |
1269 | ret = -ENOMEM; | |
1270 | goto out; | |
1271 | } | |
1272 | ||
1273 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1274 | if (!inode) { | |
1275 | ret = -ENOMEM; | |
1276 | goto out; | |
1277 | } | |
1278 | inode->i_fop = &sel_initcon_ops; | |
1279 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1280 | d_add(dentry, inode); | |
1281 | } | |
1282 | out: | |
1283 | return ret; | |
1284 | } | |
1285 | ||
e47c8fc5 CP |
1286 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1287 | { | |
1288 | return a / b - (a % b < 0); | |
1289 | } | |
1290 | ||
1291 | static inline unsigned long sel_class_to_ino(u16 class) | |
1292 | { | |
1293 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1294 | } | |
1295 | ||
1296 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1297 | { | |
1298 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1299 | } | |
1300 | ||
1301 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1302 | { | |
1303 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1304 | } | |
1305 | ||
1306 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1307 | { | |
1308 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1309 | } | |
1310 | ||
1872981b | 1311 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1312 | size_t count, loff_t *ppos) |
1313 | { | |
1314 | ssize_t rc, len; | |
1315 | char *page; | |
1316 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1317 | ||
1318 | page = (char *)__get_free_page(GFP_KERNEL); | |
1319 | if (!page) { | |
1320 | rc = -ENOMEM; | |
1321 | goto out; | |
1322 | } | |
1323 | ||
1324 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1325 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1326 | free_page((unsigned long)page); | |
1327 | out: | |
1328 | return rc; | |
1329 | } | |
1330 | ||
1331 | static const struct file_operations sel_class_ops = { | |
1332 | .read = sel_read_class, | |
1333 | }; | |
1334 | ||
1872981b | 1335 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1336 | size_t count, loff_t *ppos) |
1337 | { | |
1338 | ssize_t rc, len; | |
1339 | char *page; | |
1340 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1341 | ||
1342 | page = (char *)__get_free_page(GFP_KERNEL); | |
1343 | if (!page) { | |
1344 | rc = -ENOMEM; | |
1345 | goto out; | |
1346 | } | |
1347 | ||
1872981b | 1348 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
e47c8fc5 CP |
1349 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
1350 | free_page((unsigned long)page); | |
1351 | out: | |
1352 | return rc; | |
1353 | } | |
1354 | ||
1355 | static const struct file_operations sel_perm_ops = { | |
1356 | .read = sel_read_perm, | |
1357 | }; | |
1358 | ||
3bb56b25 PM |
1359 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1360 | size_t count, loff_t *ppos) | |
1361 | { | |
1362 | int value; | |
1363 | char tmpbuf[TMPBUFLEN]; | |
1364 | ssize_t length; | |
1365 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1366 | ||
1367 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1368 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1369 | ||
1370 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1371 | } | |
1372 | ||
1373 | static const struct file_operations sel_policycap_ops = { | |
1374 | .read = sel_read_policycap, | |
1375 | }; | |
1376 | ||
e47c8fc5 CP |
1377 | static int sel_make_perm_files(char *objclass, int classvalue, |
1378 | struct dentry *dir) | |
1379 | { | |
1380 | int i, rc = 0, nperms; | |
1381 | char **perms; | |
1382 | ||
1383 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1384 | if (rc) | |
1385 | goto out; | |
1386 | ||
1387 | for (i = 0; i < nperms; i++) { | |
1388 | struct inode *inode; | |
1389 | struct dentry *dentry; | |
1390 | ||
1391 | dentry = d_alloc_name(dir, perms[i]); | |
1392 | if (!dentry) { | |
1393 | rc = -ENOMEM; | |
1394 | goto out1; | |
1395 | } | |
1396 | ||
1397 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1398 | if (!inode) { | |
1399 | rc = -ENOMEM; | |
1400 | goto out1; | |
1401 | } | |
1402 | inode->i_fop = &sel_perm_ops; | |
1403 | /* i+1 since perm values are 1-indexed */ | |
1404 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1405 | d_add(dentry, inode); | |
1406 | } | |
1407 | ||
1408 | out1: | |
1409 | for (i = 0; i < nperms; i++) | |
1410 | kfree(perms[i]); | |
1411 | kfree(perms); | |
1412 | out: | |
1413 | return rc; | |
1414 | } | |
1415 | ||
1416 | static int sel_make_class_dir_entries(char *classname, int index, | |
1417 | struct dentry *dir) | |
1418 | { | |
1419 | struct dentry *dentry = NULL; | |
1420 | struct inode *inode = NULL; | |
1421 | int rc; | |
1422 | ||
1423 | dentry = d_alloc_name(dir, "index"); | |
1424 | if (!dentry) { | |
1425 | rc = -ENOMEM; | |
1426 | goto out; | |
1427 | } | |
1428 | ||
1429 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1430 | if (!inode) { | |
1431 | rc = -ENOMEM; | |
1432 | goto out; | |
1433 | } | |
1434 | ||
1435 | inode->i_fop = &sel_class_ops; | |
1436 | inode->i_ino = sel_class_to_ino(index); | |
1437 | d_add(dentry, inode); | |
1438 | ||
1439 | dentry = d_alloc_name(dir, "perms"); | |
1440 | if (!dentry) { | |
1441 | rc = -ENOMEM; | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1446 | if (rc) | |
1447 | goto out; | |
1448 | ||
1449 | rc = sel_make_perm_files(classname, index, dentry); | |
1450 | ||
1451 | out: | |
1452 | return rc; | |
1453 | } | |
1454 | ||
1455 | static void sel_remove_classes(void) | |
1456 | { | |
1457 | struct list_head *class_node; | |
1458 | ||
1459 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1460 | struct dentry *class_subdir = list_entry(class_node, | |
1461 | struct dentry, d_u.d_child); | |
1462 | struct list_head *class_subdir_node; | |
1463 | ||
1464 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1465 | struct dentry *d = list_entry(class_subdir_node, | |
1466 | struct dentry, d_u.d_child); | |
1467 | ||
1468 | if (d->d_inode) | |
1469 | if (d->d_inode->i_mode & S_IFDIR) | |
1470 | sel_remove_entries(d); | |
1471 | } | |
1472 | ||
1473 | sel_remove_entries(class_subdir); | |
1474 | } | |
1475 | ||
1476 | sel_remove_entries(class_dir); | |
1477 | } | |
1478 | ||
1479 | static int sel_make_classes(void) | |
1480 | { | |
1481 | int rc = 0, nclasses, i; | |
1482 | char **classes; | |
1483 | ||
1484 | /* delete any existing entries */ | |
1485 | sel_remove_classes(); | |
1486 | ||
1487 | rc = security_get_classes(&classes, &nclasses); | |
1488 | if (rc < 0) | |
1489 | goto out; | |
1490 | ||
1491 | /* +2 since classes are 1-indexed */ | |
1492 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1493 | ||
1494 | for (i = 0; i < nclasses; i++) { | |
1495 | struct dentry *class_name_dir; | |
1496 | ||
1497 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1498 | if (!class_name_dir) { | |
1499 | rc = -ENOMEM; | |
1500 | goto out1; | |
1501 | } | |
1502 | ||
1503 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1504 | &last_class_ino); | |
1505 | if (rc) | |
1506 | goto out1; | |
1507 | ||
1508 | /* i+1 since class values are 1-indexed */ | |
1509 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1510 | class_name_dir); | |
1511 | if (rc) | |
1512 | goto out1; | |
1513 | } | |
1514 | ||
1515 | out1: | |
1516 | for (i = 0; i < nclasses; i++) | |
1517 | kfree(classes[i]); | |
1518 | kfree(classes); | |
1519 | out: | |
1520 | return rc; | |
1521 | } | |
1522 | ||
3bb56b25 PM |
1523 | static int sel_make_policycap(void) |
1524 | { | |
1525 | unsigned int iter; | |
1526 | struct dentry *dentry = NULL; | |
1527 | struct inode *inode = NULL; | |
1528 | ||
1529 | sel_remove_entries(policycap_dir); | |
1530 | ||
1531 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1532 | if (iter < ARRAY_SIZE(policycap_names)) | |
1533 | dentry = d_alloc_name(policycap_dir, | |
1534 | policycap_names[iter]); | |
1535 | else | |
1536 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1537 | ||
1538 | if (dentry == NULL) | |
1539 | return -ENOMEM; | |
1540 | ||
1541 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1542 | if (inode == NULL) | |
1543 | return -ENOMEM; | |
1544 | ||
1545 | inode->i_fop = &sel_policycap_ops; | |
1546 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1547 | d_add(dentry, inode); | |
1548 | } | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
0dd4ae51 CP |
1553 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1554 | unsigned long *ino) | |
1da177e4 LT |
1555 | { |
1556 | int ret = 0; | |
1557 | struct inode *inode; | |
1558 | ||
edb20fb5 | 1559 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1560 | if (!inode) { |
1561 | ret = -ENOMEM; | |
1562 | goto out; | |
1563 | } | |
1564 | inode->i_op = &simple_dir_inode_operations; | |
1565 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1566 | inode->i_ino = ++(*ino); |
40e906f8 | 1567 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1568 | inc_nlink(inode); |
1da177e4 | 1569 | d_add(dentry, inode); |
edb20fb5 | 1570 | /* bump link count on parent directory, too */ |
d8c76e6f | 1571 | inc_nlink(dir); |
1da177e4 LT |
1572 | out: |
1573 | return ret; | |
1574 | } | |
1575 | ||
1872981b | 1576 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 LT |
1577 | { |
1578 | int ret; | |
1579 | struct dentry *dentry; | |
edb20fb5 | 1580 | struct inode *inode, *root_inode; |
1da177e4 LT |
1581 | struct inode_security_struct *isec; |
1582 | ||
1583 | static struct tree_descr selinux_files[] = { | |
1584 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1585 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1586 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1587 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1588 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1589 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1590 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1591 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1592 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1593 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1594 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1595 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1596 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
3f12070e EP |
1597 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1598 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1599 | /* last one */ {""} |
1600 | }; | |
1601 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1602 | if (ret) | |
161ce45a | 1603 | goto err; |
1da177e4 | 1604 | |
edb20fb5 JM |
1605 | root_inode = sb->s_root->d_inode; |
1606 | ||
1da177e4 | 1607 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1608 | if (!dentry) { |
1609 | ret = -ENOMEM; | |
1610 | goto err; | |
1611 | } | |
1da177e4 | 1612 | |
0dd4ae51 | 1613 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1614 | if (ret) |
161ce45a | 1615 | goto err; |
cde174a8 | 1616 | |
1da177e4 | 1617 | bool_dir = dentry; |
1da177e4 LT |
1618 | |
1619 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1620 | if (!dentry) { |
1621 | ret = -ENOMEM; | |
1622 | goto err; | |
1623 | } | |
1da177e4 LT |
1624 | |
1625 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1626 | if (!inode) { |
1627 | ret = -ENOMEM; | |
1628 | goto err; | |
1629 | } | |
6174eafc | 1630 | inode->i_ino = ++sel_last_ino; |
1872981b | 1631 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1632 | isec->sid = SECINITSID_DEVNULL; |
1633 | isec->sclass = SECCLASS_CHR_FILE; | |
1634 | isec->initialized = 1; | |
1635 | ||
1636 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1637 | d_add(dentry, inode); | |
1638 | selinux_null = dentry; | |
1639 | ||
1640 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1641 | if (!dentry) { |
1642 | ret = -ENOMEM; | |
1643 | goto err; | |
1644 | } | |
1da177e4 | 1645 | |
0dd4ae51 | 1646 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1647 | if (ret) |
161ce45a | 1648 | goto err; |
1da177e4 LT |
1649 | |
1650 | ret = sel_make_avc_files(dentry); | |
1651 | if (ret) | |
161ce45a | 1652 | goto err; |
f0ee2e46 JC |
1653 | |
1654 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1655 | if (!dentry) { | |
1656 | ret = -ENOMEM; | |
1657 | goto err; | |
1658 | } | |
1659 | ||
0dd4ae51 | 1660 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1661 | if (ret) |
1662 | goto err; | |
1663 | ||
1664 | ret = sel_make_initcon_files(dentry); | |
1665 | if (ret) | |
1666 | goto err; | |
1667 | ||
e47c8fc5 CP |
1668 | dentry = d_alloc_name(sb->s_root, "class"); |
1669 | if (!dentry) { | |
1670 | ret = -ENOMEM; | |
1671 | goto err; | |
1672 | } | |
1673 | ||
1674 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1675 | if (ret) | |
1676 | goto err; | |
1677 | ||
1678 | class_dir = dentry; | |
1679 | ||
3bb56b25 PM |
1680 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1681 | if (!dentry) { | |
1682 | ret = -ENOMEM; | |
1683 | goto err; | |
1684 | } | |
1685 | ||
1686 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1687 | if (ret) | |
1688 | goto err; | |
1689 | ||
1690 | policycap_dir = dentry; | |
1691 | ||
1da177e4 | 1692 | out: |
161ce45a JM |
1693 | return ret; |
1694 | err: | |
744ba35e EP |
1695 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1696 | __func__); | |
161ce45a | 1697 | goto out; |
1da177e4 LT |
1698 | } |
1699 | ||
454e2398 DH |
1700 | static int sel_get_sb(struct file_system_type *fs_type, |
1701 | int flags, const char *dev_name, void *data, | |
1702 | struct vfsmount *mnt) | |
1da177e4 | 1703 | { |
454e2398 | 1704 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1705 | } |
1706 | ||
1707 | static struct file_system_type sel_fs_type = { | |
1708 | .name = "selinuxfs", | |
1709 | .get_sb = sel_get_sb, | |
1710 | .kill_sb = kill_litter_super, | |
1711 | }; | |
1712 | ||
1713 | struct vfsmount *selinuxfs_mount; | |
1714 | ||
1715 | static int __init init_sel_fs(void) | |
1716 | { | |
1717 | int err; | |
1718 | ||
1719 | if (!selinux_enabled) | |
1720 | return 0; | |
1721 | err = register_filesystem(&sel_fs_type); | |
1722 | if (!err) { | |
1723 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1724 | if (IS_ERR(selinuxfs_mount)) { | |
1725 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1726 | err = PTR_ERR(selinuxfs_mount); | |
1727 | selinuxfs_mount = NULL; | |
1728 | } | |
1729 | } | |
1730 | return err; | |
1731 | } | |
1732 | ||
1733 | __initcall(init_sel_fs); | |
1734 | ||
1735 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1736 | void exit_sel_fs(void) | |
1737 | { | |
1738 | unregister_filesystem(&sel_fs_type); | |
1739 | } | |
1740 | #endif |