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Commit | Line | Data |
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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> |
1da177e4 | 30 | #include <asm/uaccess.h> |
1da177e4 LT |
31 | |
32 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
33 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
34 | ||
35 | #include "flask.h" | |
36 | #include "avc.h" | |
37 | #include "avc_ss.h" | |
38 | #include "security.h" | |
39 | #include "objsec.h" | |
40 | #include "conditional.h" | |
41 | ||
3bb56b25 PM |
42 | /* Policy capability filenames */ |
43 | static char *policycap_names[] = { | |
b0c636b9 EP |
44 | "network_peer_controls", |
45 | "open_perms" | |
3bb56b25 PM |
46 | }; |
47 | ||
1da177e4 LT |
48 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; |
49 | ||
4e5ab4cb JM |
50 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
51 | #define SELINUX_COMPAT_NET_VALUE 0 | |
52 | #else | |
53 | #define SELINUX_COMPAT_NET_VALUE 1 | |
54 | #endif | |
55 | ||
56 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; | |
57 | ||
1da177e4 LT |
58 | static int __init checkreqprot_setup(char *str) |
59 | { | |
1872981b | 60 | selinux_checkreqprot = simple_strtoul(str, NULL, 0) ? 1 : 0; |
1da177e4 LT |
61 | return 1; |
62 | } | |
63 | __setup("checkreqprot=", checkreqprot_setup); | |
64 | ||
4e5ab4cb JM |
65 | static int __init selinux_compat_net_setup(char *str) |
66 | { | |
1872981b | 67 | selinux_compat_net = simple_strtoul(str, NULL, 0) ? 1 : 0; |
4e5ab4cb JM |
68 | return 1; |
69 | } | |
70 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
71 | ||
1da177e4 | 72 | |
bb003079 | 73 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
74 | |
75 | /* global data for booleans */ | |
1872981b EP |
76 | static struct dentry *bool_dir; |
77 | static int bool_num; | |
d313f948 | 78 | static char **bool_pending_names; |
1872981b | 79 | static int *bool_pending_values; |
1da177e4 | 80 | |
e47c8fc5 | 81 | /* global data for classes */ |
1872981b | 82 | static struct dentry *class_dir; |
e47c8fc5 CP |
83 | static unsigned long last_class_ino; |
84 | ||
3bb56b25 | 85 | /* global data for policy capabilities */ |
1872981b | 86 | static struct dentry *policycap_dir; |
3bb56b25 | 87 | |
1da177e4 LT |
88 | extern void selnl_notify_setenforce(int val); |
89 | ||
90 | /* Check whether a task is allowed to use a security operation. */ | |
91 | static int task_has_security(struct task_struct *tsk, | |
92 | u32 perms) | |
93 | { | |
94 | struct task_security_struct *tsec; | |
95 | ||
96 | tsec = tsk->security; | |
97 | if (!tsec) | |
98 | return -EACCES; | |
99 | ||
100 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, | |
101 | SECCLASS_SECURITY, perms, NULL); | |
102 | } | |
103 | ||
104 | enum sel_inos { | |
105 | SEL_ROOT_INO = 2, | |
106 | SEL_LOAD, /* load policy */ | |
107 | SEL_ENFORCE, /* get or set enforcing status */ | |
108 | SEL_CONTEXT, /* validate context */ | |
109 | SEL_ACCESS, /* compute access decision */ | |
110 | SEL_CREATE, /* compute create labeling decision */ | |
111 | SEL_RELABEL, /* compute relabeling decision */ | |
112 | SEL_USER, /* compute reachable user contexts */ | |
113 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
114 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
115 | SEL_MLS, /* return if MLS policy is enabled */ | |
116 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
117 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
118 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 119 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
120 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
121 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
6174eafc | 122 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
123 | }; |
124 | ||
6174eafc JC |
125 | static unsigned long sel_last_ino = SEL_INO_NEXT - 1; |
126 | ||
3bb56b25 PM |
127 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
128 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
129 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
130 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
131 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 132 | |
1da177e4 LT |
133 | #define TMPBUFLEN 12 |
134 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
135 | size_t count, loff_t *ppos) | |
136 | { | |
137 | char tmpbuf[TMPBUFLEN]; | |
138 | ssize_t length; | |
139 | ||
140 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
141 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
142 | } | |
143 | ||
144 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
1872981b | 145 | static ssize_t sel_write_enforce(struct file *file, const char __user *buf, |
1da177e4 LT |
146 | size_t count, loff_t *ppos) |
147 | ||
148 | { | |
149 | char *page; | |
150 | ssize_t length; | |
151 | int new_value; | |
152 | ||
bfd51626 | 153 | if (count >= PAGE_SIZE) |
1da177e4 LT |
154 | return -ENOMEM; |
155 | if (*ppos != 0) { | |
156 | /* No partial writes. */ | |
157 | return -EINVAL; | |
158 | } | |
1872981b | 159 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
160 | if (!page) |
161 | return -ENOMEM; | |
162 | length = -EFAULT; | |
163 | if (copy_from_user(page, buf, count)) | |
164 | goto out; | |
165 | ||
166 | length = -EINVAL; | |
167 | if (sscanf(page, "%d", &new_value) != 1) | |
168 | goto out; | |
169 | ||
170 | if (new_value != selinux_enforcing) { | |
171 | length = task_has_security(current, SECURITY__SETENFORCE); | |
172 | if (length) | |
173 | goto out; | |
af601e46 | 174 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
175 | "enforcing=%d old_enforcing=%d auid=%u ses=%u", |
176 | new_value, selinux_enforcing, | |
177 | audit_get_loginuid(current), | |
178 | audit_get_sessionid(current)); | |
1da177e4 LT |
179 | selinux_enforcing = new_value; |
180 | if (selinux_enforcing) | |
181 | avc_ss_reset(0); | |
182 | selnl_notify_setenforce(selinux_enforcing); | |
183 | } | |
184 | length = count; | |
185 | out: | |
186 | free_page((unsigned long) page); | |
187 | return length; | |
188 | } | |
189 | #else | |
190 | #define sel_write_enforce NULL | |
191 | #endif | |
192 | ||
9c2e08c5 | 193 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
194 | .read = sel_read_enforce, |
195 | .write = sel_write_enforce, | |
196 | }; | |
197 | ||
3f12070e EP |
198 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
199 | size_t count, loff_t *ppos) | |
200 | { | |
201 | char tmpbuf[TMPBUFLEN]; | |
202 | ssize_t length; | |
203 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
204 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
205 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
206 | ||
207 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
208 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
209 | } | |
210 | ||
211 | static const struct file_operations sel_handle_unknown_ops = { | |
212 | .read = sel_read_handle_unknown, | |
213 | }; | |
214 | ||
1da177e4 | 215 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1872981b | 216 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
1da177e4 LT |
217 | size_t count, loff_t *ppos) |
218 | ||
219 | { | |
220 | char *page; | |
221 | ssize_t length; | |
222 | int new_value; | |
223 | extern int selinux_disable(void); | |
224 | ||
bfd51626 | 225 | if (count >= PAGE_SIZE) |
1da177e4 LT |
226 | return -ENOMEM; |
227 | if (*ppos != 0) { | |
228 | /* No partial writes. */ | |
229 | return -EINVAL; | |
230 | } | |
1872981b | 231 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
232 | if (!page) |
233 | return -ENOMEM; | |
234 | length = -EFAULT; | |
235 | if (copy_from_user(page, buf, count)) | |
236 | goto out; | |
237 | ||
238 | length = -EINVAL; | |
239 | if (sscanf(page, "%d", &new_value) != 1) | |
240 | goto out; | |
241 | ||
242 | if (new_value) { | |
243 | length = selinux_disable(); | |
244 | if (length < 0) | |
245 | goto out; | |
af601e46 | 246 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
247 | "selinux=0 auid=%u ses=%u", |
248 | audit_get_loginuid(current), | |
249 | audit_get_sessionid(current)); | |
1da177e4 LT |
250 | } |
251 | ||
252 | length = count; | |
253 | out: | |
254 | free_page((unsigned long) page); | |
255 | return length; | |
256 | } | |
257 | #else | |
258 | #define sel_write_disable NULL | |
259 | #endif | |
260 | ||
9c2e08c5 | 261 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
262 | .write = sel_write_disable, |
263 | }; | |
264 | ||
265 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
1872981b | 266 | size_t count, loff_t *ppos) |
1da177e4 LT |
267 | { |
268 | char tmpbuf[TMPBUFLEN]; | |
269 | ssize_t length; | |
270 | ||
271 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
272 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
273 | } | |
274 | ||
9c2e08c5 | 275 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
276 | .read = sel_read_policyvers, |
277 | }; | |
278 | ||
279 | /* declaration for sel_write_load */ | |
280 | static int sel_make_bools(void); | |
e47c8fc5 | 281 | static int sel_make_classes(void); |
3bb56b25 | 282 | static int sel_make_policycap(void); |
e47c8fc5 CP |
283 | |
284 | /* declaration for sel_make_class_dirs */ | |
285 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
286 | unsigned long *ino); | |
1da177e4 LT |
287 | |
288 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
289 | size_t count, loff_t *ppos) | |
290 | { | |
291 | char tmpbuf[TMPBUFLEN]; | |
292 | ssize_t length; | |
293 | ||
294 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
295 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
296 | } | |
297 | ||
9c2e08c5 | 298 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
299 | .read = sel_read_mls, |
300 | }; | |
301 | ||
1872981b | 302 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
303 | size_t count, loff_t *ppos) |
304 | ||
305 | { | |
306 | int ret; | |
307 | ssize_t length; | |
308 | void *data = NULL; | |
309 | ||
bb003079 | 310 | mutex_lock(&sel_mutex); |
1da177e4 LT |
311 | |
312 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
313 | if (length) | |
314 | goto out; | |
315 | ||
316 | if (*ppos != 0) { | |
317 | /* No partial writes. */ | |
318 | length = -EINVAL; | |
319 | goto out; | |
320 | } | |
321 | ||
bfd51626 | 322 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
323 | || (data = vmalloc(count)) == NULL) { |
324 | length = -ENOMEM; | |
325 | goto out; | |
326 | } | |
327 | ||
328 | length = -EFAULT; | |
329 | if (copy_from_user(data, buf, count) != 0) | |
330 | goto out; | |
331 | ||
332 | length = security_load_policy(data, count); | |
333 | if (length) | |
334 | goto out; | |
335 | ||
336 | ret = sel_make_bools(); | |
e47c8fc5 CP |
337 | if (ret) { |
338 | length = ret; | |
339 | goto out1; | |
340 | } | |
341 | ||
342 | ret = sel_make_classes(); | |
3bb56b25 PM |
343 | if (ret) { |
344 | length = ret; | |
345 | goto out1; | |
346 | } | |
347 | ||
348 | ret = sel_make_policycap(); | |
1da177e4 LT |
349 | if (ret) |
350 | length = ret; | |
351 | else | |
352 | length = count; | |
e47c8fc5 CP |
353 | |
354 | out1: | |
3f12070e EP |
355 | |
356 | printk(KERN_INFO "SELinux: policy loaded with handle_unknown=%s\n", | |
357 | (security_get_reject_unknown() ? "reject" : | |
358 | (security_get_allow_unknown() ? "allow" : "deny"))); | |
359 | ||
af601e46 | 360 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
361 | "policy loaded auid=%u ses=%u", |
362 | audit_get_loginuid(current), | |
363 | audit_get_sessionid(current)); | |
1da177e4 | 364 | out: |
bb003079 | 365 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
366 | vfree(data); |
367 | return length; | |
368 | } | |
369 | ||
9c2e08c5 | 370 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
371 | .write = sel_write_load, |
372 | }; | |
373 | ||
1872981b | 374 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 375 | { |
ce9982d0 SS |
376 | char *canon; |
377 | u32 sid, len; | |
1da177e4 LT |
378 | ssize_t length; |
379 | ||
380 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
381 | if (length) | |
382 | return length; | |
383 | ||
ce9982d0 SS |
384 | length = security_context_to_sid(buf, size, &sid); |
385 | if (length < 0) | |
386 | return length; | |
1da177e4 | 387 | |
ce9982d0 | 388 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 389 | if (length < 0) |
ce9982d0 SS |
390 | return length; |
391 | ||
392 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
393 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
394 | "payload max\n", __func__, len); | |
ce9982d0 | 395 | length = -ERANGE; |
1da177e4 | 396 | goto out; |
ce9982d0 | 397 | } |
1da177e4 | 398 | |
ce9982d0 SS |
399 | memcpy(buf, canon, len); |
400 | length = len; | |
1da177e4 | 401 | out: |
ce9982d0 | 402 | kfree(canon); |
1da177e4 LT |
403 | return length; |
404 | } | |
405 | ||
1da177e4 LT |
406 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
407 | size_t count, loff_t *ppos) | |
408 | { | |
409 | char tmpbuf[TMPBUFLEN]; | |
410 | ssize_t length; | |
411 | ||
412 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
413 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
414 | } | |
415 | ||
1872981b | 416 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
417 | size_t count, loff_t *ppos) |
418 | { | |
419 | char *page; | |
420 | ssize_t length; | |
421 | unsigned int new_value; | |
422 | ||
423 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
424 | if (length) | |
425 | return length; | |
426 | ||
bfd51626 | 427 | if (count >= PAGE_SIZE) |
1da177e4 LT |
428 | return -ENOMEM; |
429 | if (*ppos != 0) { | |
430 | /* No partial writes. */ | |
431 | return -EINVAL; | |
432 | } | |
1872981b | 433 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
434 | if (!page) |
435 | return -ENOMEM; | |
436 | length = -EFAULT; | |
437 | if (copy_from_user(page, buf, count)) | |
438 | goto out; | |
439 | ||
440 | length = -EINVAL; | |
441 | if (sscanf(page, "%u", &new_value) != 1) | |
442 | goto out; | |
443 | ||
444 | selinux_checkreqprot = new_value ? 1 : 0; | |
445 | length = count; | |
446 | out: | |
447 | free_page((unsigned long) page); | |
448 | return length; | |
449 | } | |
9c2e08c5 | 450 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
451 | .read = sel_read_checkreqprot, |
452 | .write = sel_write_checkreqprot, | |
453 | }; | |
454 | ||
4e5ab4cb JM |
455 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
456 | size_t count, loff_t *ppos) | |
457 | { | |
458 | char tmpbuf[TMPBUFLEN]; | |
459 | ssize_t length; | |
460 | ||
461 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
462 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
463 | } | |
464 | ||
1872981b | 465 | static ssize_t sel_write_compat_net(struct file *file, const char __user *buf, |
4e5ab4cb JM |
466 | size_t count, loff_t *ppos) |
467 | { | |
468 | char *page; | |
469 | ssize_t length; | |
470 | int new_value; | |
471 | ||
472 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
473 | if (length) | |
474 | return length; | |
475 | ||
476 | if (count >= PAGE_SIZE) | |
477 | return -ENOMEM; | |
478 | if (*ppos != 0) { | |
479 | /* No partial writes. */ | |
480 | return -EINVAL; | |
481 | } | |
1872981b | 482 | page = (char *)get_zeroed_page(GFP_KERNEL); |
4e5ab4cb JM |
483 | if (!page) |
484 | return -ENOMEM; | |
485 | length = -EFAULT; | |
486 | if (copy_from_user(page, buf, count)) | |
487 | goto out; | |
488 | ||
489 | length = -EINVAL; | |
490 | if (sscanf(page, "%d", &new_value) != 1) | |
491 | goto out; | |
492 | ||
493 | selinux_compat_net = new_value ? 1 : 0; | |
494 | length = count; | |
495 | out: | |
496 | free_page((unsigned long) page); | |
497 | return length; | |
498 | } | |
9c2e08c5 | 499 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
500 | .read = sel_read_compat_net, |
501 | .write = sel_write_compat_net, | |
502 | }; | |
503 | ||
1da177e4 LT |
504 | /* |
505 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
506 | */ | |
1872981b EP |
507 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
508 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
509 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
510 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
511 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 LT |
512 | |
513 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
514 | [SEL_ACCESS] = sel_write_access, | |
515 | [SEL_CREATE] = sel_write_create, | |
516 | [SEL_RELABEL] = sel_write_relabel, | |
517 | [SEL_USER] = sel_write_user, | |
518 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 519 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
520 | }; |
521 | ||
522 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
523 | { | |
1872981b | 524 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
525 | char *data; |
526 | ssize_t rv; | |
527 | ||
6e20a64a | 528 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
529 | return -EINVAL; |
530 | ||
531 | data = simple_transaction_get(file, buf, size); | |
532 | if (IS_ERR(data)) | |
533 | return PTR_ERR(data); | |
534 | ||
1872981b EP |
535 | rv = write_op[ino](file, data, size); |
536 | if (rv > 0) { | |
1da177e4 LT |
537 | simple_transaction_set(file, rv); |
538 | rv = size; | |
539 | } | |
540 | return rv; | |
541 | } | |
542 | ||
9c2e08c5 | 543 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
544 | .write = selinux_transaction_write, |
545 | .read = simple_transaction_read, | |
546 | .release = simple_transaction_release, | |
547 | }; | |
548 | ||
549 | /* | |
550 | * payload - write methods | |
551 | * If the method has a response, the response should be put in buf, | |
552 | * and the length returned. Otherwise return 0 or and -error. | |
553 | */ | |
554 | ||
1872981b | 555 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 LT |
556 | { |
557 | char *scon, *tcon; | |
558 | u32 ssid, tsid; | |
559 | u16 tclass; | |
560 | u32 req; | |
561 | struct av_decision avd; | |
562 | ssize_t length; | |
563 | ||
564 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
565 | if (length) | |
566 | return length; | |
567 | ||
568 | length = -ENOMEM; | |
89d155ef | 569 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
570 | if (!scon) |
571 | return length; | |
1da177e4 | 572 | |
89d155ef | 573 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
574 | if (!tcon) |
575 | goto out; | |
1da177e4 LT |
576 | |
577 | length = -EINVAL; | |
578 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
579 | goto out2; | |
580 | ||
581 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
582 | if (length < 0) | |
583 | goto out2; | |
584 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
585 | if (length < 0) | |
586 | goto out2; | |
587 | ||
588 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
589 | if (length < 0) | |
590 | goto out2; | |
591 | ||
592 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
593 | "%x %x %x %x %u", | |
594 | avd.allowed, avd.decided, | |
595 | avd.auditallow, avd.auditdeny, | |
596 | avd.seqno); | |
597 | out2: | |
598 | kfree(tcon); | |
599 | out: | |
600 | kfree(scon); | |
601 | return length; | |
602 | } | |
603 | ||
1872981b | 604 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 LT |
605 | { |
606 | char *scon, *tcon; | |
607 | u32 ssid, tsid, newsid; | |
608 | u16 tclass; | |
609 | ssize_t length; | |
610 | char *newcon; | |
611 | u32 len; | |
612 | ||
613 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
614 | if (length) | |
615 | return length; | |
616 | ||
617 | length = -ENOMEM; | |
89d155ef | 618 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
619 | if (!scon) |
620 | return length; | |
1da177e4 | 621 | |
89d155ef | 622 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
623 | if (!tcon) |
624 | goto out; | |
1da177e4 LT |
625 | |
626 | length = -EINVAL; | |
627 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
628 | goto out2; | |
629 | ||
630 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
631 | if (length < 0) | |
632 | goto out2; | |
633 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
634 | if (length < 0) | |
635 | goto out2; | |
636 | ||
637 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
638 | if (length < 0) | |
639 | goto out2; | |
640 | ||
641 | length = security_sid_to_context(newsid, &newcon, &len); | |
642 | if (length < 0) | |
643 | goto out2; | |
644 | ||
645 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
646 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
647 | "payload max\n", __func__, len); | |
1da177e4 LT |
648 | length = -ERANGE; |
649 | goto out3; | |
650 | } | |
651 | ||
652 | memcpy(buf, newcon, len); | |
653 | length = len; | |
654 | out3: | |
655 | kfree(newcon); | |
656 | out2: | |
657 | kfree(tcon); | |
658 | out: | |
659 | kfree(scon); | |
660 | return length; | |
661 | } | |
662 | ||
1872981b | 663 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 LT |
664 | { |
665 | char *scon, *tcon; | |
666 | u32 ssid, tsid, newsid; | |
667 | u16 tclass; | |
668 | ssize_t length; | |
669 | char *newcon; | |
670 | u32 len; | |
671 | ||
672 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
673 | if (length) | |
674 | return length; | |
675 | ||
676 | length = -ENOMEM; | |
89d155ef | 677 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
678 | if (!scon) |
679 | return length; | |
1da177e4 | 680 | |
89d155ef | 681 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
682 | if (!tcon) |
683 | goto out; | |
1da177e4 LT |
684 | |
685 | length = -EINVAL; | |
686 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
687 | goto out2; | |
688 | ||
689 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
690 | if (length < 0) | |
691 | goto out2; | |
692 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
693 | if (length < 0) | |
694 | goto out2; | |
695 | ||
696 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
697 | if (length < 0) | |
698 | goto out2; | |
699 | ||
700 | length = security_sid_to_context(newsid, &newcon, &len); | |
701 | if (length < 0) | |
702 | goto out2; | |
703 | ||
704 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
705 | length = -ERANGE; | |
706 | goto out3; | |
707 | } | |
708 | ||
709 | memcpy(buf, newcon, len); | |
710 | length = len; | |
711 | out3: | |
712 | kfree(newcon); | |
713 | out2: | |
714 | kfree(tcon); | |
715 | out: | |
716 | kfree(scon); | |
717 | return length; | |
718 | } | |
719 | ||
1872981b | 720 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 LT |
721 | { |
722 | char *con, *user, *ptr; | |
723 | u32 sid, *sids; | |
724 | ssize_t length; | |
725 | char *newcon; | |
726 | int i, rc; | |
727 | u32 len, nsids; | |
728 | ||
729 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
730 | if (length) | |
731 | return length; | |
732 | ||
733 | length = -ENOMEM; | |
89d155ef | 734 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
735 | if (!con) |
736 | return length; | |
1da177e4 | 737 | |
89d155ef | 738 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
739 | if (!user) |
740 | goto out; | |
1da177e4 LT |
741 | |
742 | length = -EINVAL; | |
743 | if (sscanf(buf, "%s %s", con, user) != 2) | |
744 | goto out2; | |
745 | ||
746 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
747 | if (length < 0) | |
748 | goto out2; | |
749 | ||
750 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
751 | if (length < 0) | |
752 | goto out2; | |
753 | ||
754 | length = sprintf(buf, "%u", nsids) + 1; | |
755 | ptr = buf + length; | |
756 | for (i = 0; i < nsids; i++) { | |
757 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
758 | if (rc) { | |
759 | length = rc; | |
760 | goto out3; | |
761 | } | |
762 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
763 | kfree(newcon); | |
764 | length = -ERANGE; | |
765 | goto out3; | |
766 | } | |
767 | memcpy(ptr, newcon, len); | |
768 | kfree(newcon); | |
769 | ptr += len; | |
770 | length += len; | |
771 | } | |
772 | out3: | |
773 | kfree(sids); | |
774 | out2: | |
775 | kfree(user); | |
776 | out: | |
777 | kfree(con); | |
778 | return length; | |
779 | } | |
780 | ||
1872981b | 781 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 LT |
782 | { |
783 | char *scon, *tcon; | |
784 | u32 ssid, tsid, newsid; | |
785 | u16 tclass; | |
786 | ssize_t length; | |
787 | char *newcon; | |
788 | u32 len; | |
789 | ||
790 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
791 | if (length) | |
792 | return length; | |
793 | ||
794 | length = -ENOMEM; | |
89d155ef | 795 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
796 | if (!scon) |
797 | return length; | |
1da177e4 | 798 | |
89d155ef | 799 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
800 | if (!tcon) |
801 | goto out; | |
1da177e4 LT |
802 | |
803 | length = -EINVAL; | |
804 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
805 | goto out2; | |
806 | ||
807 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
808 | if (length < 0) | |
809 | goto out2; | |
810 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
811 | if (length < 0) | |
812 | goto out2; | |
813 | ||
814 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
815 | if (length < 0) | |
816 | goto out2; | |
817 | ||
818 | length = security_sid_to_context(newsid, &newcon, &len); | |
819 | if (length < 0) | |
820 | goto out2; | |
821 | ||
822 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
823 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
824 | "payload max\n", __func__, len); | |
1da177e4 LT |
825 | length = -ERANGE; |
826 | goto out3; | |
827 | } | |
828 | ||
829 | memcpy(buf, newcon, len); | |
830 | length = len; | |
831 | out3: | |
832 | kfree(newcon); | |
833 | out2: | |
834 | kfree(tcon); | |
835 | out: | |
836 | kfree(scon); | |
837 | return length; | |
838 | } | |
839 | ||
840 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
841 | { | |
842 | struct inode *ret = new_inode(sb); | |
843 | ||
844 | if (ret) { | |
845 | ret->i_mode = mode; | |
846 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
847 | ret->i_blocks = 0; |
848 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
849 | } | |
850 | return ret; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
854 | size_t count, loff_t *ppos) | |
855 | { | |
856 | char *page = NULL; | |
857 | ssize_t length; | |
1da177e4 LT |
858 | ssize_t ret; |
859 | int cur_enforcing; | |
d313f948 SS |
860 | struct inode *inode = filep->f_path.dentry->d_inode; |
861 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
862 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 863 | |
bb003079 | 864 | mutex_lock(&sel_mutex); |
1da177e4 | 865 | |
d313f948 SS |
866 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
867 | ret = -EINVAL; | |
868 | goto out; | |
869 | } | |
1da177e4 | 870 | |
bfd51626 | 871 | if (count > PAGE_SIZE) { |
1da177e4 LT |
872 | ret = -EINVAL; |
873 | goto out; | |
874 | } | |
1872981b EP |
875 | page = (char *)get_zeroed_page(GFP_KERNEL); |
876 | if (!page) { | |
1da177e4 LT |
877 | ret = -ENOMEM; |
878 | goto out; | |
879 | } | |
880 | ||
d313f948 | 881 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
882 | if (cur_enforcing < 0) { |
883 | ret = cur_enforcing; | |
884 | goto out; | |
885 | } | |
1da177e4 | 886 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 887 | bool_pending_values[index]); |
68bdcf28 | 888 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 889 | out: |
bb003079 | 890 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
891 | if (page) |
892 | free_page((unsigned long)page); | |
893 | return ret; | |
894 | } | |
895 | ||
896 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
897 | size_t count, loff_t *ppos) | |
898 | { | |
899 | char *page = NULL; | |
d313f948 | 900 | ssize_t length; |
1da177e4 | 901 | int new_value; |
d313f948 SS |
902 | struct inode *inode = filep->f_path.dentry->d_inode; |
903 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
904 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 905 | |
bb003079 | 906 | mutex_lock(&sel_mutex); |
1da177e4 LT |
907 | |
908 | length = task_has_security(current, SECURITY__SETBOOL); | |
909 | if (length) | |
910 | goto out; | |
911 | ||
d313f948 SS |
912 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
913 | length = -EINVAL; | |
914 | goto out; | |
915 | } | |
916 | ||
bfd51626 | 917 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
918 | length = -ENOMEM; |
919 | goto out; | |
920 | } | |
d313f948 | 921 | |
1da177e4 LT |
922 | if (*ppos != 0) { |
923 | /* No partial writes. */ | |
d313f948 | 924 | length = -EINVAL; |
1da177e4 LT |
925 | goto out; |
926 | } | |
1872981b | 927 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
928 | if (!page) { |
929 | length = -ENOMEM; | |
930 | goto out; | |
931 | } | |
932 | ||
d313f948 | 933 | length = -EFAULT; |
1da177e4 LT |
934 | if (copy_from_user(page, buf, count)) |
935 | goto out; | |
936 | ||
937 | length = -EINVAL; | |
938 | if (sscanf(page, "%d", &new_value) != 1) | |
939 | goto out; | |
940 | ||
941 | if (new_value) | |
942 | new_value = 1; | |
943 | ||
d313f948 | 944 | bool_pending_values[index] = new_value; |
1da177e4 LT |
945 | length = count; |
946 | ||
947 | out: | |
bb003079 | 948 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
949 | if (page) |
950 | free_page((unsigned long) page); | |
951 | return length; | |
952 | } | |
953 | ||
9c2e08c5 | 954 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
955 | .read = sel_read_bool, |
956 | .write = sel_write_bool, | |
1da177e4 LT |
957 | }; |
958 | ||
959 | static ssize_t sel_commit_bools_write(struct file *filep, | |
960 | const char __user *buf, | |
961 | size_t count, loff_t *ppos) | |
962 | { | |
963 | char *page = NULL; | |
d313f948 | 964 | ssize_t length; |
1da177e4 LT |
965 | int new_value; |
966 | ||
bb003079 | 967 | mutex_lock(&sel_mutex); |
1da177e4 LT |
968 | |
969 | length = task_has_security(current, SECURITY__SETBOOL); | |
970 | if (length) | |
971 | goto out; | |
972 | ||
bfd51626 | 973 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
974 | length = -ENOMEM; |
975 | goto out; | |
976 | } | |
977 | if (*ppos != 0) { | |
978 | /* No partial writes. */ | |
979 | goto out; | |
980 | } | |
1872981b | 981 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
982 | if (!page) { |
983 | length = -ENOMEM; | |
984 | goto out; | |
985 | } | |
986 | ||
d313f948 | 987 | length = -EFAULT; |
1da177e4 LT |
988 | if (copy_from_user(page, buf, count)) |
989 | goto out; | |
990 | ||
991 | length = -EINVAL; | |
992 | if (sscanf(page, "%d", &new_value) != 1) | |
993 | goto out; | |
994 | ||
1872981b | 995 | if (new_value && bool_pending_values) |
1da177e4 | 996 | security_set_bools(bool_num, bool_pending_values); |
1da177e4 LT |
997 | |
998 | length = count; | |
999 | ||
1000 | out: | |
bb003079 | 1001 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
1002 | if (page) |
1003 | free_page((unsigned long) page); | |
1004 | return length; | |
1005 | } | |
1006 | ||
9c2e08c5 | 1007 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 1008 | .write = sel_commit_bools_write, |
1da177e4 LT |
1009 | }; |
1010 | ||
0c92d7c7 | 1011 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1012 | { |
0955dc03 | 1013 | struct list_head *node; |
1da177e4 LT |
1014 | |
1015 | spin_lock(&dcache_lock); | |
1016 | node = de->d_subdirs.next; | |
1017 | while (node != &de->d_subdirs) { | |
5160ee6f | 1018 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
1019 | list_del_init(node); |
1020 | ||
1021 | if (d->d_inode) { | |
1022 | d = dget_locked(d); | |
1023 | spin_unlock(&dcache_lock); | |
1024 | d_delete(d); | |
1025 | simple_unlink(de->d_inode, d); | |
1026 | dput(d); | |
1027 | spin_lock(&dcache_lock); | |
1028 | } | |
1029 | node = de->d_subdirs.next; | |
1030 | } | |
1031 | ||
1032 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | #define BOOL_DIR_NAME "booleans" | |
1036 | ||
1037 | static int sel_make_bools(void) | |
1038 | { | |
1039 | int i, ret = 0; | |
1040 | ssize_t len; | |
1041 | struct dentry *dentry = NULL; | |
1042 | struct dentry *dir = bool_dir; | |
1043 | struct inode *inode = NULL; | |
1044 | struct inode_security_struct *isec; | |
1045 | char **names = NULL, *page; | |
1046 | int num; | |
1047 | int *values = NULL; | |
1048 | u32 sid; | |
1049 | ||
1050 | /* remove any existing files */ | |
d313f948 | 1051 | kfree(bool_pending_names); |
9a5f04bf | 1052 | kfree(bool_pending_values); |
d313f948 | 1053 | bool_pending_names = NULL; |
20c19e41 | 1054 | bool_pending_values = NULL; |
1da177e4 | 1055 | |
0c92d7c7 | 1056 | sel_remove_entries(dir); |
1da177e4 | 1057 | |
1872981b EP |
1058 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1059 | if (!page) | |
1da177e4 LT |
1060 | return -ENOMEM; |
1061 | ||
1062 | ret = security_get_bools(&num, &names, &values); | |
1063 | if (ret != 0) | |
1064 | goto out; | |
1065 | ||
1066 | for (i = 0; i < num; i++) { | |
1067 | dentry = d_alloc_name(dir, names[i]); | |
1068 | if (!dentry) { | |
1069 | ret = -ENOMEM; | |
1070 | goto err; | |
1071 | } | |
1072 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1073 | if (!inode) { | |
1074 | ret = -ENOMEM; | |
1075 | goto err; | |
1076 | } | |
1077 | ||
1078 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1079 | if (len < 0) { | |
1080 | ret = -EINVAL; | |
1081 | goto err; | |
1082 | } else if (len >= PAGE_SIZE) { | |
1083 | ret = -ENAMETOOLONG; | |
1084 | goto err; | |
1085 | } | |
1872981b EP |
1086 | isec = (struct inode_security_struct *)inode->i_security; |
1087 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); | |
1088 | if (ret) | |
1da177e4 LT |
1089 | goto err; |
1090 | isec->sid = sid; | |
1091 | isec->initialized = 1; | |
1092 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1093 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1094 | d_add(dentry, inode); |
1095 | } | |
1096 | bool_num = num; | |
d313f948 | 1097 | bool_pending_names = names; |
1da177e4 LT |
1098 | bool_pending_values = values; |
1099 | out: | |
1100 | free_page((unsigned long)page); | |
d313f948 SS |
1101 | return ret; |
1102 | err: | |
1da177e4 | 1103 | if (names) { |
9a5f04bf JJ |
1104 | for (i = 0; i < num; i++) |
1105 | kfree(names[i]); | |
1da177e4 LT |
1106 | kfree(names); |
1107 | } | |
20c19e41 | 1108 | kfree(values); |
0c92d7c7 | 1109 | sel_remove_entries(dir); |
1da177e4 LT |
1110 | ret = -ENOMEM; |
1111 | goto out; | |
1112 | } | |
1113 | ||
1114 | #define NULL_FILE_NAME "null" | |
1115 | ||
1872981b | 1116 | struct dentry *selinux_null; |
1da177e4 LT |
1117 | |
1118 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1119 | size_t count, loff_t *ppos) | |
1120 | { | |
1121 | char tmpbuf[TMPBUFLEN]; | |
1122 | ssize_t length; | |
1123 | ||
1124 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1125 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1126 | } | |
1127 | ||
1872981b EP |
1128 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1129 | const char __user *buf, | |
1da177e4 LT |
1130 | size_t count, loff_t *ppos) |
1131 | ||
1132 | { | |
1133 | char *page; | |
1134 | ssize_t ret; | |
1135 | int new_value; | |
1136 | ||
bfd51626 | 1137 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1138 | ret = -ENOMEM; |
1139 | goto out; | |
1140 | } | |
1141 | ||
1142 | if (*ppos != 0) { | |
1143 | /* No partial writes. */ | |
1144 | ret = -EINVAL; | |
1145 | goto out; | |
1146 | } | |
1147 | ||
1872981b | 1148 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
1149 | if (!page) { |
1150 | ret = -ENOMEM; | |
1151 | goto out; | |
1152 | } | |
1153 | ||
1154 | if (copy_from_user(page, buf, count)) { | |
1155 | ret = -EFAULT; | |
1156 | goto out_free; | |
1157 | } | |
1158 | ||
1159 | if (sscanf(page, "%u", &new_value) != 1) { | |
1160 | ret = -EINVAL; | |
1161 | goto out; | |
1162 | } | |
1163 | ||
1164 | if (new_value != avc_cache_threshold) { | |
1165 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1166 | if (ret) | |
1167 | goto out_free; | |
1168 | avc_cache_threshold = new_value; | |
1169 | } | |
1170 | ret = count; | |
1171 | out_free: | |
1172 | free_page((unsigned long)page); | |
1173 | out: | |
1174 | return ret; | |
1175 | } | |
1176 | ||
1177 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1178 | size_t count, loff_t *ppos) | |
1179 | { | |
1180 | char *page; | |
1181 | ssize_t ret = 0; | |
1182 | ||
1183 | page = (char *)__get_free_page(GFP_KERNEL); | |
1184 | if (!page) { | |
1185 | ret = -ENOMEM; | |
1186 | goto out; | |
1187 | } | |
1188 | ret = avc_get_hash_stats(page); | |
1189 | if (ret >= 0) | |
1190 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1191 | free_page((unsigned long)page); | |
1192 | out: | |
1193 | return ret; | |
1194 | } | |
1195 | ||
9c2e08c5 | 1196 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1197 | .read = sel_read_avc_cache_threshold, |
1198 | .write = sel_write_avc_cache_threshold, | |
1199 | }; | |
1200 | ||
9c2e08c5 | 1201 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1202 | .read = sel_read_avc_hash_stats, |
1203 | }; | |
1204 | ||
1205 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1206 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1207 | { | |
1208 | int cpu; | |
1209 | ||
1210 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1211 | if (!cpu_possible(cpu)) | |
1212 | continue; | |
1213 | *idx = cpu + 1; | |
1214 | return &per_cpu(avc_cache_stats, cpu); | |
1215 | } | |
1216 | return NULL; | |
1217 | } | |
1218 | ||
1219 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1220 | { | |
1221 | loff_t n = *pos - 1; | |
1222 | ||
1223 | if (*pos == 0) | |
1224 | return SEQ_START_TOKEN; | |
1225 | ||
1226 | return sel_avc_get_stat_idx(&n); | |
1227 | } | |
1228 | ||
1229 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1230 | { | |
1231 | return sel_avc_get_stat_idx(pos); | |
1232 | } | |
1233 | ||
1234 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1235 | { | |
1236 | struct avc_cache_stats *st = v; | |
1237 | ||
1238 | if (v == SEQ_START_TOKEN) | |
1239 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1240 | "frees\n"); | |
1241 | else | |
1242 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1243 | st->hits, st->misses, st->allocations, | |
1244 | st->reclaims, st->frees); | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1249 | { } | |
1250 | ||
1996a109 | 1251 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1252 | .start = sel_avc_stats_seq_start, |
1253 | .next = sel_avc_stats_seq_next, | |
1254 | .show = sel_avc_stats_seq_show, | |
1255 | .stop = sel_avc_stats_seq_stop, | |
1256 | }; | |
1257 | ||
1258 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1259 | { | |
1260 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1261 | } | |
1262 | ||
9c2e08c5 | 1263 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1264 | .open = sel_open_avc_cache_stats, |
1265 | .read = seq_read, | |
1266 | .llseek = seq_lseek, | |
1267 | .release = seq_release, | |
1268 | }; | |
1269 | #endif | |
1270 | ||
1271 | static int sel_make_avc_files(struct dentry *dir) | |
1272 | { | |
1273 | int i, ret = 0; | |
1274 | static struct tree_descr files[] = { | |
1275 | { "cache_threshold", | |
1276 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1277 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1278 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1279 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1280 | #endif | |
1281 | }; | |
1282 | ||
6e20a64a | 1283 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1284 | struct inode *inode; |
1285 | struct dentry *dentry; | |
1286 | ||
1287 | dentry = d_alloc_name(dir, files[i].name); | |
1288 | if (!dentry) { | |
1289 | ret = -ENOMEM; | |
d6aafa65 | 1290 | goto out; |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1294 | if (!inode) { | |
1295 | ret = -ENOMEM; | |
d6aafa65 | 1296 | goto out; |
1da177e4 LT |
1297 | } |
1298 | inode->i_fop = files[i].ops; | |
6174eafc | 1299 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1300 | d_add(dentry, inode); |
1301 | } | |
1302 | out: | |
1303 | return ret; | |
1da177e4 LT |
1304 | } |
1305 | ||
1872981b | 1306 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1307 | size_t count, loff_t *ppos) |
1308 | { | |
1309 | struct inode *inode; | |
1310 | char *con; | |
1311 | u32 sid, len; | |
1312 | ssize_t ret; | |
1313 | ||
1314 | inode = file->f_path.dentry->d_inode; | |
1315 | sid = inode->i_ino&SEL_INO_MASK; | |
1316 | ret = security_sid_to_context(sid, &con, &len); | |
1317 | if (ret < 0) | |
1318 | return ret; | |
1319 | ||
1320 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1321 | kfree(con); | |
1322 | return ret; | |
1323 | } | |
1324 | ||
1325 | static const struct file_operations sel_initcon_ops = { | |
1326 | .read = sel_read_initcon, | |
1327 | }; | |
1328 | ||
1329 | static int sel_make_initcon_files(struct dentry *dir) | |
1330 | { | |
1331 | int i, ret = 0; | |
1332 | ||
1333 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1334 | struct inode *inode; | |
1335 | struct dentry *dentry; | |
1336 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1337 | if (!dentry) { | |
1338 | ret = -ENOMEM; | |
1339 | goto out; | |
1340 | } | |
1341 | ||
1342 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1343 | if (!inode) { | |
1344 | ret = -ENOMEM; | |
1345 | goto out; | |
1346 | } | |
1347 | inode->i_fop = &sel_initcon_ops; | |
1348 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1349 | d_add(dentry, inode); | |
1350 | } | |
1351 | out: | |
1352 | return ret; | |
1353 | } | |
1354 | ||
e47c8fc5 CP |
1355 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1356 | { | |
1357 | return a / b - (a % b < 0); | |
1358 | } | |
1359 | ||
1360 | static inline unsigned long sel_class_to_ino(u16 class) | |
1361 | { | |
1362 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1363 | } | |
1364 | ||
1365 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1366 | { | |
1367 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1368 | } | |
1369 | ||
1370 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1371 | { | |
1372 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1373 | } | |
1374 | ||
1375 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1376 | { | |
1377 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1378 | } | |
1379 | ||
1872981b | 1380 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1381 | size_t count, loff_t *ppos) |
1382 | { | |
1383 | ssize_t rc, len; | |
1384 | char *page; | |
1385 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1386 | ||
1387 | page = (char *)__get_free_page(GFP_KERNEL); | |
1388 | if (!page) { | |
1389 | rc = -ENOMEM; | |
1390 | goto out; | |
1391 | } | |
1392 | ||
1393 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1394 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1395 | free_page((unsigned long)page); | |
1396 | out: | |
1397 | return rc; | |
1398 | } | |
1399 | ||
1400 | static const struct file_operations sel_class_ops = { | |
1401 | .read = sel_read_class, | |
1402 | }; | |
1403 | ||
1872981b | 1404 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1405 | size_t count, loff_t *ppos) |
1406 | { | |
1407 | ssize_t rc, len; | |
1408 | char *page; | |
1409 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1410 | ||
1411 | page = (char *)__get_free_page(GFP_KERNEL); | |
1412 | if (!page) { | |
1413 | rc = -ENOMEM; | |
1414 | goto out; | |
1415 | } | |
1416 | ||
1872981b | 1417 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
e47c8fc5 CP |
1418 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
1419 | free_page((unsigned long)page); | |
1420 | out: | |
1421 | return rc; | |
1422 | } | |
1423 | ||
1424 | static const struct file_operations sel_perm_ops = { | |
1425 | .read = sel_read_perm, | |
1426 | }; | |
1427 | ||
3bb56b25 PM |
1428 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1429 | size_t count, loff_t *ppos) | |
1430 | { | |
1431 | int value; | |
1432 | char tmpbuf[TMPBUFLEN]; | |
1433 | ssize_t length; | |
1434 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1435 | ||
1436 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1437 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1438 | ||
1439 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1440 | } | |
1441 | ||
1442 | static const struct file_operations sel_policycap_ops = { | |
1443 | .read = sel_read_policycap, | |
1444 | }; | |
1445 | ||
e47c8fc5 CP |
1446 | static int sel_make_perm_files(char *objclass, int classvalue, |
1447 | struct dentry *dir) | |
1448 | { | |
1449 | int i, rc = 0, nperms; | |
1450 | char **perms; | |
1451 | ||
1452 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1453 | if (rc) | |
1454 | goto out; | |
1455 | ||
1456 | for (i = 0; i < nperms; i++) { | |
1457 | struct inode *inode; | |
1458 | struct dentry *dentry; | |
1459 | ||
1460 | dentry = d_alloc_name(dir, perms[i]); | |
1461 | if (!dentry) { | |
1462 | rc = -ENOMEM; | |
1463 | goto out1; | |
1464 | } | |
1465 | ||
1466 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1467 | if (!inode) { | |
1468 | rc = -ENOMEM; | |
1469 | goto out1; | |
1470 | } | |
1471 | inode->i_fop = &sel_perm_ops; | |
1472 | /* i+1 since perm values are 1-indexed */ | |
1473 | inode->i_ino = sel_perm_to_ino(classvalue, i+1); | |
1474 | d_add(dentry, inode); | |
1475 | } | |
1476 | ||
1477 | out1: | |
1478 | for (i = 0; i < nperms; i++) | |
1479 | kfree(perms[i]); | |
1480 | kfree(perms); | |
1481 | out: | |
1482 | return rc; | |
1483 | } | |
1484 | ||
1485 | static int sel_make_class_dir_entries(char *classname, int index, | |
1486 | struct dentry *dir) | |
1487 | { | |
1488 | struct dentry *dentry = NULL; | |
1489 | struct inode *inode = NULL; | |
1490 | int rc; | |
1491 | ||
1492 | dentry = d_alloc_name(dir, "index"); | |
1493 | if (!dentry) { | |
1494 | rc = -ENOMEM; | |
1495 | goto out; | |
1496 | } | |
1497 | ||
1498 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1499 | if (!inode) { | |
1500 | rc = -ENOMEM; | |
1501 | goto out; | |
1502 | } | |
1503 | ||
1504 | inode->i_fop = &sel_class_ops; | |
1505 | inode->i_ino = sel_class_to_ino(index); | |
1506 | d_add(dentry, inode); | |
1507 | ||
1508 | dentry = d_alloc_name(dir, "perms"); | |
1509 | if (!dentry) { | |
1510 | rc = -ENOMEM; | |
1511 | goto out; | |
1512 | } | |
1513 | ||
1514 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1515 | if (rc) | |
1516 | goto out; | |
1517 | ||
1518 | rc = sel_make_perm_files(classname, index, dentry); | |
1519 | ||
1520 | out: | |
1521 | return rc; | |
1522 | } | |
1523 | ||
1524 | static void sel_remove_classes(void) | |
1525 | { | |
1526 | struct list_head *class_node; | |
1527 | ||
1528 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1529 | struct dentry *class_subdir = list_entry(class_node, | |
1530 | struct dentry, d_u.d_child); | |
1531 | struct list_head *class_subdir_node; | |
1532 | ||
1533 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1534 | struct dentry *d = list_entry(class_subdir_node, | |
1535 | struct dentry, d_u.d_child); | |
1536 | ||
1537 | if (d->d_inode) | |
1538 | if (d->d_inode->i_mode & S_IFDIR) | |
1539 | sel_remove_entries(d); | |
1540 | } | |
1541 | ||
1542 | sel_remove_entries(class_subdir); | |
1543 | } | |
1544 | ||
1545 | sel_remove_entries(class_dir); | |
1546 | } | |
1547 | ||
1548 | static int sel_make_classes(void) | |
1549 | { | |
1550 | int rc = 0, nclasses, i; | |
1551 | char **classes; | |
1552 | ||
1553 | /* delete any existing entries */ | |
1554 | sel_remove_classes(); | |
1555 | ||
1556 | rc = security_get_classes(&classes, &nclasses); | |
1557 | if (rc < 0) | |
1558 | goto out; | |
1559 | ||
1560 | /* +2 since classes are 1-indexed */ | |
1561 | last_class_ino = sel_class_to_ino(nclasses+2); | |
1562 | ||
1563 | for (i = 0; i < nclasses; i++) { | |
1564 | struct dentry *class_name_dir; | |
1565 | ||
1566 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1567 | if (!class_name_dir) { | |
1568 | rc = -ENOMEM; | |
1569 | goto out1; | |
1570 | } | |
1571 | ||
1572 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1573 | &last_class_ino); | |
1574 | if (rc) | |
1575 | goto out1; | |
1576 | ||
1577 | /* i+1 since class values are 1-indexed */ | |
1578 | rc = sel_make_class_dir_entries(classes[i], i+1, | |
1579 | class_name_dir); | |
1580 | if (rc) | |
1581 | goto out1; | |
1582 | } | |
1583 | ||
1584 | out1: | |
1585 | for (i = 0; i < nclasses; i++) | |
1586 | kfree(classes[i]); | |
1587 | kfree(classes); | |
1588 | out: | |
1589 | return rc; | |
1590 | } | |
1591 | ||
3bb56b25 PM |
1592 | static int sel_make_policycap(void) |
1593 | { | |
1594 | unsigned int iter; | |
1595 | struct dentry *dentry = NULL; | |
1596 | struct inode *inode = NULL; | |
1597 | ||
1598 | sel_remove_entries(policycap_dir); | |
1599 | ||
1600 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1601 | if (iter < ARRAY_SIZE(policycap_names)) | |
1602 | dentry = d_alloc_name(policycap_dir, | |
1603 | policycap_names[iter]); | |
1604 | else | |
1605 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1606 | ||
1607 | if (dentry == NULL) | |
1608 | return -ENOMEM; | |
1609 | ||
1610 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1611 | if (inode == NULL) | |
1612 | return -ENOMEM; | |
1613 | ||
1614 | inode->i_fop = &sel_policycap_ops; | |
1615 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1616 | d_add(dentry, inode); | |
1617 | } | |
1618 | ||
1619 | return 0; | |
1620 | } | |
1621 | ||
0dd4ae51 CP |
1622 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1623 | unsigned long *ino) | |
1da177e4 LT |
1624 | { |
1625 | int ret = 0; | |
1626 | struct inode *inode; | |
1627 | ||
edb20fb5 | 1628 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1629 | if (!inode) { |
1630 | ret = -ENOMEM; | |
1631 | goto out; | |
1632 | } | |
1633 | inode->i_op = &simple_dir_inode_operations; | |
1634 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1635 | inode->i_ino = ++(*ino); |
40e906f8 | 1636 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1637 | inc_nlink(inode); |
1da177e4 | 1638 | d_add(dentry, inode); |
edb20fb5 | 1639 | /* bump link count on parent directory, too */ |
d8c76e6f | 1640 | inc_nlink(dir); |
1da177e4 LT |
1641 | out: |
1642 | return ret; | |
1643 | } | |
1644 | ||
1872981b | 1645 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 LT |
1646 | { |
1647 | int ret; | |
1648 | struct dentry *dentry; | |
edb20fb5 | 1649 | struct inode *inode, *root_inode; |
1da177e4 LT |
1650 | struct inode_security_struct *isec; |
1651 | ||
1652 | static struct tree_descr selinux_files[] = { | |
1653 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1654 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1655 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1656 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1657 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1658 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1659 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1660 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1661 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1662 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1663 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1664 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1665 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1666 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
3f12070e EP |
1667 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1668 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1669 | /* last one */ {""} |
1670 | }; | |
1671 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1672 | if (ret) | |
161ce45a | 1673 | goto err; |
1da177e4 | 1674 | |
edb20fb5 JM |
1675 | root_inode = sb->s_root->d_inode; |
1676 | ||
1da177e4 | 1677 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1678 | if (!dentry) { |
1679 | ret = -ENOMEM; | |
1680 | goto err; | |
1681 | } | |
1da177e4 | 1682 | |
0dd4ae51 | 1683 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1684 | if (ret) |
161ce45a | 1685 | goto err; |
cde174a8 | 1686 | |
1da177e4 | 1687 | bool_dir = dentry; |
1da177e4 LT |
1688 | |
1689 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1690 | if (!dentry) { |
1691 | ret = -ENOMEM; | |
1692 | goto err; | |
1693 | } | |
1da177e4 LT |
1694 | |
1695 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1696 | if (!inode) { |
1697 | ret = -ENOMEM; | |
1698 | goto err; | |
1699 | } | |
6174eafc | 1700 | inode->i_ino = ++sel_last_ino; |
1872981b | 1701 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1702 | isec->sid = SECINITSID_DEVNULL; |
1703 | isec->sclass = SECCLASS_CHR_FILE; | |
1704 | isec->initialized = 1; | |
1705 | ||
1706 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1707 | d_add(dentry, inode); | |
1708 | selinux_null = dentry; | |
1709 | ||
1710 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1711 | if (!dentry) { |
1712 | ret = -ENOMEM; | |
1713 | goto err; | |
1714 | } | |
1da177e4 | 1715 | |
0dd4ae51 | 1716 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1717 | if (ret) |
161ce45a | 1718 | goto err; |
1da177e4 LT |
1719 | |
1720 | ret = sel_make_avc_files(dentry); | |
1721 | if (ret) | |
161ce45a | 1722 | goto err; |
f0ee2e46 JC |
1723 | |
1724 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1725 | if (!dentry) { | |
1726 | ret = -ENOMEM; | |
1727 | goto err; | |
1728 | } | |
1729 | ||
0dd4ae51 | 1730 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1731 | if (ret) |
1732 | goto err; | |
1733 | ||
1734 | ret = sel_make_initcon_files(dentry); | |
1735 | if (ret) | |
1736 | goto err; | |
1737 | ||
e47c8fc5 CP |
1738 | dentry = d_alloc_name(sb->s_root, "class"); |
1739 | if (!dentry) { | |
1740 | ret = -ENOMEM; | |
1741 | goto err; | |
1742 | } | |
1743 | ||
1744 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1745 | if (ret) | |
1746 | goto err; | |
1747 | ||
1748 | class_dir = dentry; | |
1749 | ||
3bb56b25 PM |
1750 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1751 | if (!dentry) { | |
1752 | ret = -ENOMEM; | |
1753 | goto err; | |
1754 | } | |
1755 | ||
1756 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1757 | if (ret) | |
1758 | goto err; | |
1759 | ||
1760 | policycap_dir = dentry; | |
1761 | ||
1da177e4 | 1762 | out: |
161ce45a JM |
1763 | return ret; |
1764 | err: | |
744ba35e EP |
1765 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1766 | __func__); | |
161ce45a | 1767 | goto out; |
1da177e4 LT |
1768 | } |
1769 | ||
454e2398 DH |
1770 | static int sel_get_sb(struct file_system_type *fs_type, |
1771 | int flags, const char *dev_name, void *data, | |
1772 | struct vfsmount *mnt) | |
1da177e4 | 1773 | { |
454e2398 | 1774 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1775 | } |
1776 | ||
1777 | static struct file_system_type sel_fs_type = { | |
1778 | .name = "selinuxfs", | |
1779 | .get_sb = sel_get_sb, | |
1780 | .kill_sb = kill_litter_super, | |
1781 | }; | |
1782 | ||
1783 | struct vfsmount *selinuxfs_mount; | |
1784 | ||
1785 | static int __init init_sel_fs(void) | |
1786 | { | |
1787 | int err; | |
1788 | ||
1789 | if (!selinux_enabled) | |
1790 | return 0; | |
1791 | err = register_filesystem(&sel_fs_type); | |
1792 | if (!err) { | |
1793 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1794 | if (IS_ERR(selinuxfs_mount)) { | |
1795 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1796 | err = PTR_ERR(selinuxfs_mount); | |
1797 | selinuxfs_mount = NULL; | |
1798 | } | |
1799 | } | |
1800 | return err; | |
1801 | } | |
1802 | ||
1803 | __initcall(init_sel_fs); | |
1804 | ||
1805 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1806 | void exit_sel_fs(void) | |
1807 | { | |
1808 | unregister_filesystem(&sel_fs_type); | |
1809 | } | |
1810 | #endif |