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; | |
1da177e4 LT |
497 | struct av_decision avd; |
498 | ssize_t length; | |
499 | ||
500 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
501 | if (length) | |
502 | return length; | |
503 | ||
504 | length = -ENOMEM; | |
89d155ef | 505 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
506 | if (!scon) |
507 | return length; | |
1da177e4 | 508 | |
89d155ef | 509 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
510 | if (!tcon) |
511 | goto out; | |
1da177e4 LT |
512 | |
513 | length = -EINVAL; | |
19439d05 | 514 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
1da177e4 LT |
515 | goto out2; |
516 | ||
517 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
518 | if (length < 0) | |
519 | goto out2; | |
520 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
521 | if (length < 0) | |
522 | goto out2; | |
523 | ||
19439d05 | 524 | security_compute_av_user(ssid, tsid, tclass, &avd); |
1da177e4 LT |
525 | |
526 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
8a6f83af | 527 | "%x %x %x %x %u %x", |
f1c6381a | 528 | avd.allowed, 0xffffffff, |
1da177e4 | 529 | avd.auditallow, avd.auditdeny, |
8a6f83af | 530 | avd.seqno, avd.flags); |
1da177e4 LT |
531 | out2: |
532 | kfree(tcon); | |
533 | out: | |
534 | kfree(scon); | |
535 | return length; | |
536 | } | |
537 | ||
1872981b | 538 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 LT |
539 | { |
540 | char *scon, *tcon; | |
541 | u32 ssid, tsid, newsid; | |
542 | u16 tclass; | |
543 | ssize_t length; | |
544 | char *newcon; | |
545 | u32 len; | |
546 | ||
547 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
548 | if (length) | |
549 | return length; | |
550 | ||
551 | length = -ENOMEM; | |
89d155ef | 552 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
553 | if (!scon) |
554 | return length; | |
1da177e4 | 555 | |
89d155ef | 556 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
557 | if (!tcon) |
558 | goto out; | |
1da177e4 LT |
559 | |
560 | length = -EINVAL; | |
561 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
562 | goto out2; | |
563 | ||
564 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
565 | if (length < 0) | |
566 | goto out2; | |
567 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
568 | if (length < 0) | |
569 | goto out2; | |
570 | ||
c6d3aaa4 | 571 | length = security_transition_sid_user(ssid, tsid, tclass, &newsid); |
1da177e4 LT |
572 | if (length < 0) |
573 | goto out2; | |
574 | ||
575 | length = security_sid_to_context(newsid, &newcon, &len); | |
576 | if (length < 0) | |
577 | goto out2; | |
578 | ||
579 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
580 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
581 | "payload max\n", __func__, len); | |
1da177e4 LT |
582 | length = -ERANGE; |
583 | goto out3; | |
584 | } | |
585 | ||
586 | memcpy(buf, newcon, len); | |
587 | length = len; | |
588 | out3: | |
589 | kfree(newcon); | |
590 | out2: | |
591 | kfree(tcon); | |
592 | out: | |
593 | kfree(scon); | |
594 | return length; | |
595 | } | |
596 | ||
1872981b | 597 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 LT |
598 | { |
599 | char *scon, *tcon; | |
600 | u32 ssid, tsid, newsid; | |
601 | u16 tclass; | |
602 | ssize_t length; | |
603 | char *newcon; | |
604 | u32 len; | |
605 | ||
606 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
607 | if (length) | |
608 | return length; | |
609 | ||
610 | length = -ENOMEM; | |
89d155ef | 611 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
612 | if (!scon) |
613 | return length; | |
1da177e4 | 614 | |
89d155ef | 615 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
616 | if (!tcon) |
617 | goto out; | |
1da177e4 LT |
618 | |
619 | length = -EINVAL; | |
620 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
621 | goto out2; | |
622 | ||
623 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
624 | if (length < 0) | |
625 | goto out2; | |
626 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
627 | if (length < 0) | |
628 | goto out2; | |
629 | ||
630 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
631 | if (length < 0) | |
632 | goto out2; | |
633 | ||
634 | length = security_sid_to_context(newsid, &newcon, &len); | |
635 | if (length < 0) | |
636 | goto out2; | |
637 | ||
638 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
639 | length = -ERANGE; | |
640 | goto out3; | |
641 | } | |
642 | ||
643 | memcpy(buf, newcon, len); | |
644 | length = len; | |
645 | out3: | |
646 | kfree(newcon); | |
647 | out2: | |
648 | kfree(tcon); | |
649 | out: | |
650 | kfree(scon); | |
651 | return length; | |
652 | } | |
653 | ||
1872981b | 654 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 LT |
655 | { |
656 | char *con, *user, *ptr; | |
657 | u32 sid, *sids; | |
658 | ssize_t length; | |
659 | char *newcon; | |
660 | int i, rc; | |
661 | u32 len, nsids; | |
662 | ||
663 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
664 | if (length) | |
665 | return length; | |
666 | ||
667 | length = -ENOMEM; | |
89d155ef | 668 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
669 | if (!con) |
670 | return length; | |
1da177e4 | 671 | |
89d155ef | 672 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
673 | if (!user) |
674 | goto out; | |
1da177e4 LT |
675 | |
676 | length = -EINVAL; | |
677 | if (sscanf(buf, "%s %s", con, user) != 2) | |
678 | goto out2; | |
679 | ||
680 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
681 | if (length < 0) | |
682 | goto out2; | |
683 | ||
684 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
685 | if (length < 0) | |
686 | goto out2; | |
687 | ||
688 | length = sprintf(buf, "%u", nsids) + 1; | |
689 | ptr = buf + length; | |
690 | for (i = 0; i < nsids; i++) { | |
691 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
692 | if (rc) { | |
693 | length = rc; | |
694 | goto out3; | |
695 | } | |
696 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
697 | kfree(newcon); | |
698 | length = -ERANGE; | |
699 | goto out3; | |
700 | } | |
701 | memcpy(ptr, newcon, len); | |
702 | kfree(newcon); | |
703 | ptr += len; | |
704 | length += len; | |
705 | } | |
706 | out3: | |
707 | kfree(sids); | |
708 | out2: | |
709 | kfree(user); | |
710 | out: | |
711 | kfree(con); | |
712 | return length; | |
713 | } | |
714 | ||
1872981b | 715 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 LT |
716 | { |
717 | char *scon, *tcon; | |
718 | u32 ssid, tsid, newsid; | |
719 | u16 tclass; | |
720 | ssize_t length; | |
721 | char *newcon; | |
722 | u32 len; | |
723 | ||
724 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
725 | if (length) | |
726 | return length; | |
727 | ||
728 | length = -ENOMEM; | |
89d155ef | 729 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
730 | if (!scon) |
731 | return length; | |
1da177e4 | 732 | |
89d155ef | 733 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
734 | if (!tcon) |
735 | goto out; | |
1da177e4 LT |
736 | |
737 | length = -EINVAL; | |
738 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
739 | goto out2; | |
740 | ||
741 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
742 | if (length < 0) | |
743 | goto out2; | |
744 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
745 | if (length < 0) | |
746 | goto out2; | |
747 | ||
748 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
749 | if (length < 0) | |
750 | goto out2; | |
751 | ||
752 | length = security_sid_to_context(newsid, &newcon, &len); | |
753 | if (length < 0) | |
754 | goto out2; | |
755 | ||
756 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
757 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
758 | "payload max\n", __func__, len); | |
1da177e4 LT |
759 | length = -ERANGE; |
760 | goto out3; | |
761 | } | |
762 | ||
763 | memcpy(buf, newcon, len); | |
764 | length = len; | |
765 | out3: | |
766 | kfree(newcon); | |
767 | out2: | |
768 | kfree(tcon); | |
769 | out: | |
770 | kfree(scon); | |
771 | return length; | |
772 | } | |
773 | ||
774 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
775 | { | |
776 | struct inode *ret = new_inode(sb); | |
777 | ||
778 | if (ret) { | |
779 | ret->i_mode = mode; | |
1da177e4 LT |
780 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
781 | } | |
782 | return ret; | |
783 | } | |
784 | ||
1da177e4 LT |
785 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
786 | size_t count, loff_t *ppos) | |
787 | { | |
788 | char *page = NULL; | |
789 | ssize_t length; | |
1da177e4 LT |
790 | ssize_t ret; |
791 | int cur_enforcing; | |
d313f948 SS |
792 | struct inode *inode = filep->f_path.dentry->d_inode; |
793 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
794 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 795 | |
bb003079 | 796 | mutex_lock(&sel_mutex); |
1da177e4 | 797 | |
d313f948 SS |
798 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
799 | ret = -EINVAL; | |
800 | goto out; | |
801 | } | |
1da177e4 | 802 | |
1872981b EP |
803 | page = (char *)get_zeroed_page(GFP_KERNEL); |
804 | if (!page) { | |
1da177e4 LT |
805 | ret = -ENOMEM; |
806 | goto out; | |
807 | } | |
808 | ||
d313f948 | 809 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
810 | if (cur_enforcing < 0) { |
811 | ret = cur_enforcing; | |
812 | goto out; | |
813 | } | |
1da177e4 | 814 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 815 | bool_pending_values[index]); |
68bdcf28 | 816 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 817 | out: |
bb003079 | 818 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
819 | if (page) |
820 | free_page((unsigned long)page); | |
821 | return ret; | |
822 | } | |
823 | ||
824 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
825 | size_t count, loff_t *ppos) | |
826 | { | |
827 | char *page = NULL; | |
d313f948 | 828 | ssize_t length; |
1da177e4 | 829 | int new_value; |
d313f948 SS |
830 | struct inode *inode = filep->f_path.dentry->d_inode; |
831 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
832 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 833 | |
bb003079 | 834 | mutex_lock(&sel_mutex); |
1da177e4 LT |
835 | |
836 | length = task_has_security(current, SECURITY__SETBOOL); | |
837 | if (length) | |
838 | goto out; | |
839 | ||
d313f948 SS |
840 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
841 | length = -EINVAL; | |
842 | goto out; | |
843 | } | |
844 | ||
bfd51626 | 845 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
846 | length = -ENOMEM; |
847 | goto out; | |
848 | } | |
d313f948 | 849 | |
1da177e4 LT |
850 | if (*ppos != 0) { |
851 | /* No partial writes. */ | |
d313f948 | 852 | length = -EINVAL; |
1da177e4 LT |
853 | goto out; |
854 | } | |
1872981b | 855 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
856 | if (!page) { |
857 | length = -ENOMEM; | |
858 | goto out; | |
859 | } | |
860 | ||
d313f948 | 861 | length = -EFAULT; |
1da177e4 LT |
862 | if (copy_from_user(page, buf, count)) |
863 | goto out; | |
864 | ||
865 | length = -EINVAL; | |
866 | if (sscanf(page, "%d", &new_value) != 1) | |
867 | goto out; | |
868 | ||
869 | if (new_value) | |
870 | new_value = 1; | |
871 | ||
d313f948 | 872 | bool_pending_values[index] = new_value; |
1da177e4 LT |
873 | length = count; |
874 | ||
875 | out: | |
bb003079 | 876 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
877 | if (page) |
878 | free_page((unsigned long) page); | |
879 | return length; | |
880 | } | |
881 | ||
9c2e08c5 | 882 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
883 | .read = sel_read_bool, |
884 | .write = sel_write_bool, | |
1da177e4 LT |
885 | }; |
886 | ||
887 | static ssize_t sel_commit_bools_write(struct file *filep, | |
888 | const char __user *buf, | |
889 | size_t count, loff_t *ppos) | |
890 | { | |
891 | char *page = NULL; | |
d313f948 | 892 | ssize_t length; |
1da177e4 LT |
893 | int new_value; |
894 | ||
bb003079 | 895 | mutex_lock(&sel_mutex); |
1da177e4 LT |
896 | |
897 | length = task_has_security(current, SECURITY__SETBOOL); | |
898 | if (length) | |
899 | goto out; | |
900 | ||
bfd51626 | 901 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
902 | length = -ENOMEM; |
903 | goto out; | |
904 | } | |
905 | if (*ppos != 0) { | |
906 | /* No partial writes. */ | |
907 | goto out; | |
908 | } | |
1872981b | 909 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
910 | if (!page) { |
911 | length = -ENOMEM; | |
912 | goto out; | |
913 | } | |
914 | ||
d313f948 | 915 | length = -EFAULT; |
1da177e4 LT |
916 | if (copy_from_user(page, buf, count)) |
917 | goto out; | |
918 | ||
919 | length = -EINVAL; | |
920 | if (sscanf(page, "%d", &new_value) != 1) | |
921 | goto out; | |
922 | ||
1872981b | 923 | if (new_value && bool_pending_values) |
1da177e4 | 924 | security_set_bools(bool_num, bool_pending_values); |
1da177e4 LT |
925 | |
926 | length = count; | |
927 | ||
928 | out: | |
bb003079 | 929 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
930 | if (page) |
931 | free_page((unsigned long) page); | |
932 | return length; | |
933 | } | |
934 | ||
9c2e08c5 | 935 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 936 | .write = sel_commit_bools_write, |
1da177e4 LT |
937 | }; |
938 | ||
0c92d7c7 | 939 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 940 | { |
0955dc03 | 941 | struct list_head *node; |
1da177e4 LT |
942 | |
943 | spin_lock(&dcache_lock); | |
944 | node = de->d_subdirs.next; | |
945 | while (node != &de->d_subdirs) { | |
5160ee6f | 946 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
947 | list_del_init(node); |
948 | ||
949 | if (d->d_inode) { | |
950 | d = dget_locked(d); | |
951 | spin_unlock(&dcache_lock); | |
952 | d_delete(d); | |
953 | simple_unlink(de->d_inode, d); | |
954 | dput(d); | |
955 | spin_lock(&dcache_lock); | |
956 | } | |
957 | node = de->d_subdirs.next; | |
958 | } | |
959 | ||
960 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
961 | } |
962 | ||
963 | #define BOOL_DIR_NAME "booleans" | |
964 | ||
965 | static int sel_make_bools(void) | |
966 | { | |
967 | int i, ret = 0; | |
968 | ssize_t len; | |
969 | struct dentry *dentry = NULL; | |
970 | struct dentry *dir = bool_dir; | |
971 | struct inode *inode = NULL; | |
972 | struct inode_security_struct *isec; | |
973 | char **names = NULL, *page; | |
974 | int num; | |
975 | int *values = NULL; | |
976 | u32 sid; | |
977 | ||
978 | /* remove any existing files */ | |
d313f948 | 979 | kfree(bool_pending_names); |
9a5f04bf | 980 | kfree(bool_pending_values); |
d313f948 | 981 | bool_pending_names = NULL; |
20c19e41 | 982 | bool_pending_values = NULL; |
1da177e4 | 983 | |
0c92d7c7 | 984 | sel_remove_entries(dir); |
1da177e4 | 985 | |
1872981b EP |
986 | page = (char *)get_zeroed_page(GFP_KERNEL); |
987 | if (!page) | |
1da177e4 LT |
988 | return -ENOMEM; |
989 | ||
990 | ret = security_get_bools(&num, &names, &values); | |
991 | if (ret != 0) | |
992 | goto out; | |
993 | ||
994 | for (i = 0; i < num; i++) { | |
995 | dentry = d_alloc_name(dir, names[i]); | |
996 | if (!dentry) { | |
997 | ret = -ENOMEM; | |
998 | goto err; | |
999 | } | |
1000 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1001 | if (!inode) { | |
1002 | ret = -ENOMEM; | |
1003 | goto err; | |
1004 | } | |
1005 | ||
1006 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1007 | if (len < 0) { | |
1008 | ret = -EINVAL; | |
1009 | goto err; | |
1010 | } else if (len >= PAGE_SIZE) { | |
1011 | ret = -ENAMETOOLONG; | |
1012 | goto err; | |
1013 | } | |
1872981b EP |
1014 | isec = (struct inode_security_struct *)inode->i_security; |
1015 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); | |
1016 | if (ret) | |
1da177e4 LT |
1017 | goto err; |
1018 | isec->sid = sid; | |
1019 | isec->initialized = 1; | |
1020 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1021 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1022 | d_add(dentry, inode); |
1023 | } | |
1024 | bool_num = num; | |
d313f948 | 1025 | bool_pending_names = names; |
1da177e4 LT |
1026 | bool_pending_values = values; |
1027 | out: | |
1028 | free_page((unsigned long)page); | |
d313f948 SS |
1029 | return ret; |
1030 | err: | |
1da177e4 | 1031 | if (names) { |
9a5f04bf JJ |
1032 | for (i = 0; i < num; i++) |
1033 | kfree(names[i]); | |
1da177e4 LT |
1034 | kfree(names); |
1035 | } | |
20c19e41 | 1036 | kfree(values); |
0c92d7c7 | 1037 | sel_remove_entries(dir); |
1da177e4 LT |
1038 | ret = -ENOMEM; |
1039 | goto out; | |
1040 | } | |
1041 | ||
1042 | #define NULL_FILE_NAME "null" | |
1043 | ||
1872981b | 1044 | struct dentry *selinux_null; |
1da177e4 LT |
1045 | |
1046 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1047 | size_t count, loff_t *ppos) | |
1048 | { | |
1049 | char tmpbuf[TMPBUFLEN]; | |
1050 | ssize_t length; | |
1051 | ||
1052 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1053 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1054 | } | |
1055 | ||
1872981b EP |
1056 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1057 | const char __user *buf, | |
1da177e4 LT |
1058 | size_t count, loff_t *ppos) |
1059 | ||
1060 | { | |
1061 | char *page; | |
1062 | ssize_t ret; | |
1063 | int new_value; | |
1064 | ||
bfd51626 | 1065 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1066 | ret = -ENOMEM; |
1067 | goto out; | |
1068 | } | |
1069 | ||
1070 | if (*ppos != 0) { | |
1071 | /* No partial writes. */ | |
1072 | ret = -EINVAL; | |
1073 | goto out; | |
1074 | } | |
1075 | ||
1872981b | 1076 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
1077 | if (!page) { |
1078 | ret = -ENOMEM; | |
1079 | goto out; | |
1080 | } | |
1081 | ||
1082 | if (copy_from_user(page, buf, count)) { | |
1083 | ret = -EFAULT; | |
1084 | goto out_free; | |
1085 | } | |
1086 | ||
1087 | if (sscanf(page, "%u", &new_value) != 1) { | |
1088 | ret = -EINVAL; | |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | if (new_value != avc_cache_threshold) { | |
1093 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1094 | if (ret) | |
1095 | goto out_free; | |
1096 | avc_cache_threshold = new_value; | |
1097 | } | |
1098 | ret = count; | |
1099 | out_free: | |
1100 | free_page((unsigned long)page); | |
1101 | out: | |
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1106 | size_t count, loff_t *ppos) | |
1107 | { | |
1108 | char *page; | |
1109 | ssize_t ret = 0; | |
1110 | ||
1111 | page = (char *)__get_free_page(GFP_KERNEL); | |
1112 | if (!page) { | |
1113 | ret = -ENOMEM; | |
1114 | goto out; | |
1115 | } | |
1116 | ret = avc_get_hash_stats(page); | |
1117 | if (ret >= 0) | |
1118 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1119 | free_page((unsigned long)page); | |
1120 | out: | |
1121 | return ret; | |
1122 | } | |
1123 | ||
9c2e08c5 | 1124 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1125 | .read = sel_read_avc_cache_threshold, |
1126 | .write = sel_write_avc_cache_threshold, | |
1127 | }; | |
1128 | ||
9c2e08c5 | 1129 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1130 | .read = sel_read_avc_hash_stats, |
1131 | }; | |
1132 | ||
1133 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1134 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1135 | { | |
1136 | int cpu; | |
1137 | ||
4f4b6c1a | 1138 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1139 | if (!cpu_possible(cpu)) |
1140 | continue; | |
1141 | *idx = cpu + 1; | |
1142 | return &per_cpu(avc_cache_stats, cpu); | |
1143 | } | |
1144 | return NULL; | |
1145 | } | |
1146 | ||
1147 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1148 | { | |
1149 | loff_t n = *pos - 1; | |
1150 | ||
1151 | if (*pos == 0) | |
1152 | return SEQ_START_TOKEN; | |
1153 | ||
1154 | return sel_avc_get_stat_idx(&n); | |
1155 | } | |
1156 | ||
1157 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1158 | { | |
1159 | return sel_avc_get_stat_idx(pos); | |
1160 | } | |
1161 | ||
1162 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1163 | { | |
1164 | struct avc_cache_stats *st = v; | |
1165 | ||
1166 | if (v == SEQ_START_TOKEN) | |
1167 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1168 | "frees\n"); | |
1169 | else | |
1170 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1171 | st->hits, st->misses, st->allocations, | |
1172 | st->reclaims, st->frees); | |
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1177 | { } | |
1178 | ||
1996a109 | 1179 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1180 | .start = sel_avc_stats_seq_start, |
1181 | .next = sel_avc_stats_seq_next, | |
1182 | .show = sel_avc_stats_seq_show, | |
1183 | .stop = sel_avc_stats_seq_stop, | |
1184 | }; | |
1185 | ||
1186 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1187 | { | |
1188 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1189 | } | |
1190 | ||
9c2e08c5 | 1191 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1192 | .open = sel_open_avc_cache_stats, |
1193 | .read = seq_read, | |
1194 | .llseek = seq_lseek, | |
1195 | .release = seq_release, | |
1196 | }; | |
1197 | #endif | |
1198 | ||
1199 | static int sel_make_avc_files(struct dentry *dir) | |
1200 | { | |
1201 | int i, ret = 0; | |
1202 | static struct tree_descr files[] = { | |
1203 | { "cache_threshold", | |
1204 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1205 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1206 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1207 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1208 | #endif | |
1209 | }; | |
1210 | ||
6e20a64a | 1211 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1212 | struct inode *inode; |
1213 | struct dentry *dentry; | |
1214 | ||
1215 | dentry = d_alloc_name(dir, files[i].name); | |
1216 | if (!dentry) { | |
1217 | ret = -ENOMEM; | |
d6aafa65 | 1218 | goto out; |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1222 | if (!inode) { | |
1223 | ret = -ENOMEM; | |
d6aafa65 | 1224 | goto out; |
1da177e4 LT |
1225 | } |
1226 | inode->i_fop = files[i].ops; | |
6174eafc | 1227 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1228 | d_add(dentry, inode); |
1229 | } | |
1230 | out: | |
1231 | return ret; | |
1da177e4 LT |
1232 | } |
1233 | ||
1872981b | 1234 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1235 | size_t count, loff_t *ppos) |
1236 | { | |
1237 | struct inode *inode; | |
1238 | char *con; | |
1239 | u32 sid, len; | |
1240 | ssize_t ret; | |
1241 | ||
1242 | inode = file->f_path.dentry->d_inode; | |
1243 | sid = inode->i_ino&SEL_INO_MASK; | |
1244 | ret = security_sid_to_context(sid, &con, &len); | |
1245 | if (ret < 0) | |
1246 | return ret; | |
1247 | ||
1248 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1249 | kfree(con); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
1253 | static const struct file_operations sel_initcon_ops = { | |
1254 | .read = sel_read_initcon, | |
1255 | }; | |
1256 | ||
1257 | static int sel_make_initcon_files(struct dentry *dir) | |
1258 | { | |
1259 | int i, ret = 0; | |
1260 | ||
1261 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1262 | struct inode *inode; | |
1263 | struct dentry *dentry; | |
1264 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1265 | if (!dentry) { | |
1266 | ret = -ENOMEM; | |
1267 | goto out; | |
1268 | } | |
1269 | ||
1270 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1271 | if (!inode) { | |
1272 | ret = -ENOMEM; | |
1273 | goto out; | |
1274 | } | |
1275 | inode->i_fop = &sel_initcon_ops; | |
1276 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1277 | d_add(dentry, inode); | |
1278 | } | |
1279 | out: | |
1280 | return ret; | |
1281 | } | |
1282 | ||
e47c8fc5 CP |
1283 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1284 | { | |
1285 | return a / b - (a % b < 0); | |
1286 | } | |
1287 | ||
1288 | static inline unsigned long sel_class_to_ino(u16 class) | |
1289 | { | |
1290 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1291 | } | |
1292 | ||
1293 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1294 | { | |
1295 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1296 | } | |
1297 | ||
1298 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1299 | { | |
1300 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1301 | } | |
1302 | ||
1303 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1304 | { | |
1305 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1306 | } | |
1307 | ||
1872981b | 1308 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1309 | size_t count, loff_t *ppos) |
1310 | { | |
1311 | ssize_t rc, len; | |
1312 | char *page; | |
1313 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1314 | ||
1315 | page = (char *)__get_free_page(GFP_KERNEL); | |
1316 | if (!page) { | |
1317 | rc = -ENOMEM; | |
1318 | goto out; | |
1319 | } | |
1320 | ||
1321 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1322 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1323 | free_page((unsigned long)page); | |
1324 | out: | |
1325 | return rc; | |
1326 | } | |
1327 | ||
1328 | static const struct file_operations sel_class_ops = { | |
1329 | .read = sel_read_class, | |
1330 | }; | |
1331 | ||
1872981b | 1332 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1333 | size_t count, loff_t *ppos) |
1334 | { | |
1335 | ssize_t rc, len; | |
1336 | char *page; | |
1337 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1338 | ||
1339 | page = (char *)__get_free_page(GFP_KERNEL); | |
1340 | if (!page) { | |
1341 | rc = -ENOMEM; | |
1342 | goto out; | |
1343 | } | |
1344 | ||
1872981b | 1345 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
e47c8fc5 CP |
1346 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
1347 | free_page((unsigned long)page); | |
1348 | out: | |
1349 | return rc; | |
1350 | } | |
1351 | ||
1352 | static const struct file_operations sel_perm_ops = { | |
1353 | .read = sel_read_perm, | |
1354 | }; | |
1355 | ||
3bb56b25 PM |
1356 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1357 | size_t count, loff_t *ppos) | |
1358 | { | |
1359 | int value; | |
1360 | char tmpbuf[TMPBUFLEN]; | |
1361 | ssize_t length; | |
1362 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1363 | ||
1364 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1365 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1366 | ||
1367 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1368 | } | |
1369 | ||
1370 | static const struct file_operations sel_policycap_ops = { | |
1371 | .read = sel_read_policycap, | |
1372 | }; | |
1373 | ||
e47c8fc5 CP |
1374 | static int sel_make_perm_files(char *objclass, int classvalue, |
1375 | struct dentry *dir) | |
1376 | { | |
1377 | int i, rc = 0, nperms; | |
1378 | char **perms; | |
1379 | ||
1380 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1381 | if (rc) | |
1382 | goto out; | |
1383 | ||
1384 | for (i = 0; i < nperms; i++) { | |
1385 | struct inode *inode; | |
1386 | struct dentry *dentry; | |
1387 | ||
1388 | dentry = d_alloc_name(dir, perms[i]); | |
1389 | if (!dentry) { | |
1390 | rc = -ENOMEM; | |
1391 | goto out1; | |
1392 | } | |
1393 | ||
1394 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1395 | if (!inode) { | |
1396 | rc = -ENOMEM; | |
1397 | goto out1; | |
1398 | } | |
1399 | inode->i_fop = &sel_perm_ops; | |
1400 | /* i+1 since perm values are 1-indexed */ | |
1401 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1402 | d_add(dentry, inode); | |
1403 | } | |
1404 | ||
1405 | out1: | |
1406 | for (i = 0; i < nperms; i++) | |
1407 | kfree(perms[i]); | |
1408 | kfree(perms); | |
1409 | out: | |
1410 | return rc; | |
1411 | } | |
1412 | ||
1413 | static int sel_make_class_dir_entries(char *classname, int index, | |
1414 | struct dentry *dir) | |
1415 | { | |
1416 | struct dentry *dentry = NULL; | |
1417 | struct inode *inode = NULL; | |
1418 | int rc; | |
1419 | ||
1420 | dentry = d_alloc_name(dir, "index"); | |
1421 | if (!dentry) { | |
1422 | rc = -ENOMEM; | |
1423 | goto out; | |
1424 | } | |
1425 | ||
1426 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1427 | if (!inode) { | |
1428 | rc = -ENOMEM; | |
1429 | goto out; | |
1430 | } | |
1431 | ||
1432 | inode->i_fop = &sel_class_ops; | |
1433 | inode->i_ino = sel_class_to_ino(index); | |
1434 | d_add(dentry, inode); | |
1435 | ||
1436 | dentry = d_alloc_name(dir, "perms"); | |
1437 | if (!dentry) { | |
1438 | rc = -ENOMEM; | |
1439 | goto out; | |
1440 | } | |
1441 | ||
1442 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1443 | if (rc) | |
1444 | goto out; | |
1445 | ||
1446 | rc = sel_make_perm_files(classname, index, dentry); | |
1447 | ||
1448 | out: | |
1449 | return rc; | |
1450 | } | |
1451 | ||
1452 | static void sel_remove_classes(void) | |
1453 | { | |
1454 | struct list_head *class_node; | |
1455 | ||
1456 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1457 | struct dentry *class_subdir = list_entry(class_node, | |
1458 | struct dentry, d_u.d_child); | |
1459 | struct list_head *class_subdir_node; | |
1460 | ||
1461 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1462 | struct dentry *d = list_entry(class_subdir_node, | |
1463 | struct dentry, d_u.d_child); | |
1464 | ||
1465 | if (d->d_inode) | |
1466 | if (d->d_inode->i_mode & S_IFDIR) | |
1467 | sel_remove_entries(d); | |
1468 | } | |
1469 | ||
1470 | sel_remove_entries(class_subdir); | |
1471 | } | |
1472 | ||
1473 | sel_remove_entries(class_dir); | |
1474 | } | |
1475 | ||
1476 | static int sel_make_classes(void) | |
1477 | { | |
1478 | int rc = 0, nclasses, i; | |
1479 | char **classes; | |
1480 | ||
1481 | /* delete any existing entries */ | |
1482 | sel_remove_classes(); | |
1483 | ||
1484 | rc = security_get_classes(&classes, &nclasses); | |
1485 | if (rc < 0) | |
1486 | goto out; | |
1487 | ||
1488 | /* +2 since classes are 1-indexed */ | |
1489 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1490 | ||
1491 | for (i = 0; i < nclasses; i++) { | |
1492 | struct dentry *class_name_dir; | |
1493 | ||
1494 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1495 | if (!class_name_dir) { | |
1496 | rc = -ENOMEM; | |
1497 | goto out1; | |
1498 | } | |
1499 | ||
1500 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1501 | &last_class_ino); | |
1502 | if (rc) | |
1503 | goto out1; | |
1504 | ||
1505 | /* i+1 since class values are 1-indexed */ | |
1506 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1507 | class_name_dir); | |
1508 | if (rc) | |
1509 | goto out1; | |
1510 | } | |
1511 | ||
1512 | out1: | |
1513 | for (i = 0; i < nclasses; i++) | |
1514 | kfree(classes[i]); | |
1515 | kfree(classes); | |
1516 | out: | |
1517 | return rc; | |
1518 | } | |
1519 | ||
3bb56b25 PM |
1520 | static int sel_make_policycap(void) |
1521 | { | |
1522 | unsigned int iter; | |
1523 | struct dentry *dentry = NULL; | |
1524 | struct inode *inode = NULL; | |
1525 | ||
1526 | sel_remove_entries(policycap_dir); | |
1527 | ||
1528 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1529 | if (iter < ARRAY_SIZE(policycap_names)) | |
1530 | dentry = d_alloc_name(policycap_dir, | |
1531 | policycap_names[iter]); | |
1532 | else | |
1533 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1534 | ||
1535 | if (dentry == NULL) | |
1536 | return -ENOMEM; | |
1537 | ||
1538 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1539 | if (inode == NULL) | |
1540 | return -ENOMEM; | |
1541 | ||
1542 | inode->i_fop = &sel_policycap_ops; | |
1543 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1544 | d_add(dentry, inode); | |
1545 | } | |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
0dd4ae51 CP |
1550 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1551 | unsigned long *ino) | |
1da177e4 LT |
1552 | { |
1553 | int ret = 0; | |
1554 | struct inode *inode; | |
1555 | ||
edb20fb5 | 1556 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1557 | if (!inode) { |
1558 | ret = -ENOMEM; | |
1559 | goto out; | |
1560 | } | |
1561 | inode->i_op = &simple_dir_inode_operations; | |
1562 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1563 | inode->i_ino = ++(*ino); |
40e906f8 | 1564 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1565 | inc_nlink(inode); |
1da177e4 | 1566 | d_add(dentry, inode); |
edb20fb5 | 1567 | /* bump link count on parent directory, too */ |
d8c76e6f | 1568 | inc_nlink(dir); |
1da177e4 LT |
1569 | out: |
1570 | return ret; | |
1571 | } | |
1572 | ||
1872981b | 1573 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 LT |
1574 | { |
1575 | int ret; | |
1576 | struct dentry *dentry; | |
edb20fb5 | 1577 | struct inode *inode, *root_inode; |
1da177e4 LT |
1578 | struct inode_security_struct *isec; |
1579 | ||
1580 | static struct tree_descr selinux_files[] = { | |
1581 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1582 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1583 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1584 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1585 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1586 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1587 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1588 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1589 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1590 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1591 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1592 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1593 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
3f12070e EP |
1594 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1595 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1596 | /* last one */ {""} |
1597 | }; | |
1598 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1599 | if (ret) | |
161ce45a | 1600 | goto err; |
1da177e4 | 1601 | |
edb20fb5 JM |
1602 | root_inode = sb->s_root->d_inode; |
1603 | ||
1da177e4 | 1604 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1605 | if (!dentry) { |
1606 | ret = -ENOMEM; | |
1607 | goto err; | |
1608 | } | |
1da177e4 | 1609 | |
0dd4ae51 | 1610 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1611 | if (ret) |
161ce45a | 1612 | goto err; |
cde174a8 | 1613 | |
1da177e4 | 1614 | bool_dir = dentry; |
1da177e4 LT |
1615 | |
1616 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1617 | if (!dentry) { |
1618 | ret = -ENOMEM; | |
1619 | goto err; | |
1620 | } | |
1da177e4 LT |
1621 | |
1622 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1623 | if (!inode) { |
1624 | ret = -ENOMEM; | |
1625 | goto err; | |
1626 | } | |
6174eafc | 1627 | inode->i_ino = ++sel_last_ino; |
1872981b | 1628 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1629 | isec->sid = SECINITSID_DEVNULL; |
1630 | isec->sclass = SECCLASS_CHR_FILE; | |
1631 | isec->initialized = 1; | |
1632 | ||
1633 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1634 | d_add(dentry, inode); | |
1635 | selinux_null = dentry; | |
1636 | ||
1637 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1638 | if (!dentry) { |
1639 | ret = -ENOMEM; | |
1640 | goto err; | |
1641 | } | |
1da177e4 | 1642 | |
0dd4ae51 | 1643 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1644 | if (ret) |
161ce45a | 1645 | goto err; |
1da177e4 LT |
1646 | |
1647 | ret = sel_make_avc_files(dentry); | |
1648 | if (ret) | |
161ce45a | 1649 | goto err; |
f0ee2e46 JC |
1650 | |
1651 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1652 | if (!dentry) { | |
1653 | ret = -ENOMEM; | |
1654 | goto err; | |
1655 | } | |
1656 | ||
0dd4ae51 | 1657 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1658 | if (ret) |
1659 | goto err; | |
1660 | ||
1661 | ret = sel_make_initcon_files(dentry); | |
1662 | if (ret) | |
1663 | goto err; | |
1664 | ||
e47c8fc5 CP |
1665 | dentry = d_alloc_name(sb->s_root, "class"); |
1666 | if (!dentry) { | |
1667 | ret = -ENOMEM; | |
1668 | goto err; | |
1669 | } | |
1670 | ||
1671 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1672 | if (ret) | |
1673 | goto err; | |
1674 | ||
1675 | class_dir = dentry; | |
1676 | ||
3bb56b25 PM |
1677 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1678 | if (!dentry) { | |
1679 | ret = -ENOMEM; | |
1680 | goto err; | |
1681 | } | |
1682 | ||
1683 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1684 | if (ret) | |
1685 | goto err; | |
1686 | ||
1687 | policycap_dir = dentry; | |
1688 | ||
1da177e4 | 1689 | out: |
161ce45a JM |
1690 | return ret; |
1691 | err: | |
744ba35e EP |
1692 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1693 | __func__); | |
161ce45a | 1694 | goto out; |
1da177e4 LT |
1695 | } |
1696 | ||
454e2398 DH |
1697 | static int sel_get_sb(struct file_system_type *fs_type, |
1698 | int flags, const char *dev_name, void *data, | |
1699 | struct vfsmount *mnt) | |
1da177e4 | 1700 | { |
454e2398 | 1701 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1702 | } |
1703 | ||
1704 | static struct file_system_type sel_fs_type = { | |
1705 | .name = "selinuxfs", | |
1706 | .get_sb = sel_get_sb, | |
1707 | .kill_sb = kill_litter_super, | |
1708 | }; | |
1709 | ||
1710 | struct vfsmount *selinuxfs_mount; | |
1711 | ||
1712 | static int __init init_sel_fs(void) | |
1713 | { | |
1714 | int err; | |
1715 | ||
1716 | if (!selinux_enabled) | |
1717 | return 0; | |
1718 | err = register_filesystem(&sel_fs_type); | |
1719 | if (!err) { | |
1720 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1721 | if (IS_ERR(selinuxfs_mount)) { | |
1722 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1723 | err = PTR_ERR(selinuxfs_mount); | |
1724 | selinuxfs_mount = NULL; | |
1725 | } | |
1726 | } | |
1727 | return err; | |
1728 | } | |
1729 | ||
1730 | __initcall(init_sel_fs); | |
1731 | ||
1732 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1733 | void exit_sel_fs(void) | |
1734 | { | |
1735 | unregister_filesystem(&sel_fs_type); | |
1736 | } | |
1737 | #endif |