]>
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, | |
57a62c23 | 187 | .llseek = generic_file_llseek, |
1da177e4 LT |
188 | }; |
189 | ||
3f12070e EP |
190 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
191 | size_t count, loff_t *ppos) | |
192 | { | |
193 | char tmpbuf[TMPBUFLEN]; | |
194 | ssize_t length; | |
195 | ino_t ino = filp->f_path.dentry->d_inode->i_ino; | |
196 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? | |
197 | security_get_reject_unknown() : !security_get_allow_unknown(); | |
198 | ||
199 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
200 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
201 | } | |
202 | ||
203 | static const struct file_operations sel_handle_unknown_ops = { | |
204 | .read = sel_read_handle_unknown, | |
57a62c23 | 205 | .llseek = generic_file_llseek, |
3f12070e EP |
206 | }; |
207 | ||
1da177e4 | 208 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1872981b | 209 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
1da177e4 LT |
210 | size_t count, loff_t *ppos) |
211 | ||
212 | { | |
213 | char *page; | |
214 | ssize_t length; | |
215 | int new_value; | |
216 | extern int selinux_disable(void); | |
217 | ||
bfd51626 | 218 | if (count >= PAGE_SIZE) |
1da177e4 LT |
219 | return -ENOMEM; |
220 | if (*ppos != 0) { | |
221 | /* No partial writes. */ | |
222 | return -EINVAL; | |
223 | } | |
1872981b | 224 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
225 | if (!page) |
226 | return -ENOMEM; | |
227 | length = -EFAULT; | |
228 | if (copy_from_user(page, buf, count)) | |
229 | goto out; | |
230 | ||
231 | length = -EINVAL; | |
232 | if (sscanf(page, "%d", &new_value) != 1) | |
233 | goto out; | |
234 | ||
235 | if (new_value) { | |
236 | length = selinux_disable(); | |
237 | if (length < 0) | |
238 | goto out; | |
af601e46 | 239 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
4746ec5b EP |
240 | "selinux=0 auid=%u ses=%u", |
241 | audit_get_loginuid(current), | |
242 | audit_get_sessionid(current)); | |
1da177e4 LT |
243 | } |
244 | ||
245 | length = count; | |
246 | out: | |
247 | free_page((unsigned long) page); | |
248 | return length; | |
249 | } | |
250 | #else | |
251 | #define sel_write_disable NULL | |
252 | #endif | |
253 | ||
9c2e08c5 | 254 | static const struct file_operations sel_disable_ops = { |
1da177e4 | 255 | .write = sel_write_disable, |
57a62c23 | 256 | .llseek = generic_file_llseek, |
1da177e4 LT |
257 | }; |
258 | ||
259 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
1872981b | 260 | size_t count, loff_t *ppos) |
1da177e4 LT |
261 | { |
262 | char tmpbuf[TMPBUFLEN]; | |
263 | ssize_t length; | |
264 | ||
265 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
266 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
267 | } | |
268 | ||
9c2e08c5 | 269 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 | 270 | .read = sel_read_policyvers, |
57a62c23 | 271 | .llseek = generic_file_llseek, |
1da177e4 LT |
272 | }; |
273 | ||
274 | /* declaration for sel_write_load */ | |
275 | static int sel_make_bools(void); | |
e47c8fc5 | 276 | static int sel_make_classes(void); |
3bb56b25 | 277 | static int sel_make_policycap(void); |
e47c8fc5 CP |
278 | |
279 | /* declaration for sel_make_class_dirs */ | |
280 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, | |
281 | unsigned long *ino); | |
1da177e4 LT |
282 | |
283 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
284 | size_t count, loff_t *ppos) | |
285 | { | |
286 | char tmpbuf[TMPBUFLEN]; | |
287 | ssize_t length; | |
288 | ||
0719aaf5 GT |
289 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", |
290 | security_mls_enabled()); | |
1da177e4 LT |
291 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
292 | } | |
293 | ||
9c2e08c5 | 294 | static const struct file_operations sel_mls_ops = { |
1da177e4 | 295 | .read = sel_read_mls, |
57a62c23 | 296 | .llseek = generic_file_llseek, |
1da177e4 LT |
297 | }; |
298 | ||
1872981b | 299 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
300 | size_t count, loff_t *ppos) |
301 | ||
302 | { | |
303 | int ret; | |
304 | ssize_t length; | |
305 | void *data = NULL; | |
306 | ||
bb003079 | 307 | mutex_lock(&sel_mutex); |
1da177e4 LT |
308 | |
309 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
310 | if (length) | |
311 | goto out; | |
312 | ||
313 | if (*ppos != 0) { | |
314 | /* No partial writes. */ | |
315 | length = -EINVAL; | |
316 | goto out; | |
317 | } | |
318 | ||
bfd51626 | 319 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
320 | || (data = vmalloc(count)) == NULL) { |
321 | length = -ENOMEM; | |
322 | goto out; | |
323 | } | |
324 | ||
325 | length = -EFAULT; | |
326 | if (copy_from_user(data, buf, count) != 0) | |
327 | goto out; | |
328 | ||
329 | length = security_load_policy(data, count); | |
330 | if (length) | |
331 | goto out; | |
332 | ||
333 | ret = sel_make_bools(); | |
e47c8fc5 CP |
334 | if (ret) { |
335 | length = ret; | |
336 | goto out1; | |
337 | } | |
338 | ||
339 | ret = sel_make_classes(); | |
3bb56b25 PM |
340 | if (ret) { |
341 | length = ret; | |
342 | goto out1; | |
343 | } | |
344 | ||
345 | ret = sel_make_policycap(); | |
1da177e4 LT |
346 | if (ret) |
347 | length = ret; | |
348 | else | |
349 | length = count; | |
e47c8fc5 CP |
350 | |
351 | out1: | |
af601e46 | 352 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
4746ec5b EP |
353 | "policy loaded auid=%u ses=%u", |
354 | audit_get_loginuid(current), | |
355 | audit_get_sessionid(current)); | |
1da177e4 | 356 | out: |
bb003079 | 357 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
358 | vfree(data); |
359 | return length; | |
360 | } | |
361 | ||
9c2e08c5 | 362 | static const struct file_operations sel_load_ops = { |
1da177e4 | 363 | .write = sel_write_load, |
57a62c23 | 364 | .llseek = generic_file_llseek, |
1da177e4 LT |
365 | }; |
366 | ||
1872981b | 367 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 368 | { |
ce9982d0 SS |
369 | char *canon; |
370 | u32 sid, len; | |
1da177e4 LT |
371 | ssize_t length; |
372 | ||
373 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
374 | if (length) | |
375 | return length; | |
376 | ||
ce9982d0 SS |
377 | length = security_context_to_sid(buf, size, &sid); |
378 | if (length < 0) | |
379 | return length; | |
1da177e4 | 380 | |
ce9982d0 | 381 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 382 | if (length < 0) |
ce9982d0 SS |
383 | return length; |
384 | ||
385 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
386 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
387 | "payload max\n", __func__, len); | |
ce9982d0 | 388 | length = -ERANGE; |
1da177e4 | 389 | goto out; |
ce9982d0 | 390 | } |
1da177e4 | 391 | |
ce9982d0 SS |
392 | memcpy(buf, canon, len); |
393 | length = len; | |
1da177e4 | 394 | out: |
ce9982d0 | 395 | kfree(canon); |
1da177e4 LT |
396 | return length; |
397 | } | |
398 | ||
1da177e4 LT |
399 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
400 | size_t count, loff_t *ppos) | |
401 | { | |
402 | char tmpbuf[TMPBUFLEN]; | |
403 | ssize_t length; | |
404 | ||
405 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
406 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
407 | } | |
408 | ||
1872981b | 409 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
410 | size_t count, loff_t *ppos) |
411 | { | |
412 | char *page; | |
413 | ssize_t length; | |
414 | unsigned int new_value; | |
415 | ||
416 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
417 | if (length) | |
418 | return length; | |
419 | ||
bfd51626 | 420 | if (count >= PAGE_SIZE) |
1da177e4 LT |
421 | return -ENOMEM; |
422 | if (*ppos != 0) { | |
423 | /* No partial writes. */ | |
424 | return -EINVAL; | |
425 | } | |
1872981b | 426 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
427 | if (!page) |
428 | return -ENOMEM; | |
429 | length = -EFAULT; | |
430 | if (copy_from_user(page, buf, count)) | |
431 | goto out; | |
432 | ||
433 | length = -EINVAL; | |
434 | if (sscanf(page, "%u", &new_value) != 1) | |
435 | goto out; | |
436 | ||
437 | selinux_checkreqprot = new_value ? 1 : 0; | |
438 | length = count; | |
439 | out: | |
440 | free_page((unsigned long) page); | |
441 | return length; | |
442 | } | |
9c2e08c5 | 443 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
444 | .read = sel_read_checkreqprot, |
445 | .write = sel_write_checkreqprot, | |
57a62c23 | 446 | .llseek = generic_file_llseek, |
1da177e4 LT |
447 | }; |
448 | ||
449 | /* | |
450 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
451 | */ | |
1872981b EP |
452 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
453 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
454 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
455 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
456 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 LT |
457 | |
458 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
459 | [SEL_ACCESS] = sel_write_access, | |
460 | [SEL_CREATE] = sel_write_create, | |
461 | [SEL_RELABEL] = sel_write_relabel, | |
462 | [SEL_USER] = sel_write_user, | |
463 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 464 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
465 | }; |
466 | ||
467 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
468 | { | |
1872981b | 469 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
470 | char *data; |
471 | ssize_t rv; | |
472 | ||
6e20a64a | 473 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
474 | return -EINVAL; |
475 | ||
476 | data = simple_transaction_get(file, buf, size); | |
477 | if (IS_ERR(data)) | |
478 | return PTR_ERR(data); | |
479 | ||
1872981b EP |
480 | rv = write_op[ino](file, data, size); |
481 | if (rv > 0) { | |
1da177e4 LT |
482 | simple_transaction_set(file, rv); |
483 | rv = size; | |
484 | } | |
485 | return rv; | |
486 | } | |
487 | ||
9c2e08c5 | 488 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
489 | .write = selinux_transaction_write, |
490 | .read = simple_transaction_read, | |
491 | .release = simple_transaction_release, | |
57a62c23 | 492 | .llseek = generic_file_llseek, |
1da177e4 LT |
493 | }; |
494 | ||
495 | /* | |
496 | * payload - write methods | |
497 | * If the method has a response, the response should be put in buf, | |
498 | * and the length returned. Otherwise return 0 or and -error. | |
499 | */ | |
500 | ||
1872981b | 501 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 LT |
502 | { |
503 | char *scon, *tcon; | |
504 | u32 ssid, tsid; | |
505 | u16 tclass; | |
1da177e4 LT |
506 | struct av_decision avd; |
507 | ssize_t length; | |
508 | ||
509 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
510 | if (length) | |
511 | return length; | |
512 | ||
513 | length = -ENOMEM; | |
c1a7368a | 514 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
515 | if (!scon) |
516 | return length; | |
1da177e4 | 517 | |
c1a7368a | 518 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
519 | if (!tcon) |
520 | goto out; | |
1da177e4 LT |
521 | |
522 | length = -EINVAL; | |
19439d05 | 523 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
1da177e4 LT |
524 | goto out2; |
525 | ||
c1a7368a | 526 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
1da177e4 LT |
527 | if (length < 0) |
528 | goto out2; | |
c1a7368a | 529 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
1da177e4 LT |
530 | if (length < 0) |
531 | goto out2; | |
532 | ||
19439d05 | 533 | security_compute_av_user(ssid, tsid, tclass, &avd); |
1da177e4 LT |
534 | |
535 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
8a6f83af | 536 | "%x %x %x %x %u %x", |
f1c6381a | 537 | avd.allowed, 0xffffffff, |
1da177e4 | 538 | avd.auditallow, avd.auditdeny, |
8a6f83af | 539 | avd.seqno, avd.flags); |
1da177e4 LT |
540 | out2: |
541 | kfree(tcon); | |
542 | out: | |
543 | kfree(scon); | |
544 | return length; | |
545 | } | |
546 | ||
1872981b | 547 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 LT |
548 | { |
549 | char *scon, *tcon; | |
550 | u32 ssid, tsid, newsid; | |
551 | u16 tclass; | |
552 | ssize_t length; | |
553 | char *newcon; | |
554 | u32 len; | |
555 | ||
556 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
557 | if (length) | |
558 | return length; | |
559 | ||
560 | length = -ENOMEM; | |
c1a7368a | 561 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
562 | if (!scon) |
563 | return length; | |
1da177e4 | 564 | |
c1a7368a | 565 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
566 | if (!tcon) |
567 | goto out; | |
1da177e4 LT |
568 | |
569 | length = -EINVAL; | |
570 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
571 | goto out2; | |
572 | ||
c1a7368a | 573 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
1da177e4 LT |
574 | if (length < 0) |
575 | goto out2; | |
c1a7368a | 576 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
1da177e4 LT |
577 | if (length < 0) |
578 | goto out2; | |
579 | ||
c6d3aaa4 | 580 | length = security_transition_sid_user(ssid, tsid, tclass, &newsid); |
1da177e4 LT |
581 | if (length < 0) |
582 | goto out2; | |
583 | ||
584 | length = security_sid_to_context(newsid, &newcon, &len); | |
585 | if (length < 0) | |
586 | goto out2; | |
587 | ||
588 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
589 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
590 | "payload max\n", __func__, len); | |
1da177e4 LT |
591 | length = -ERANGE; |
592 | goto out3; | |
593 | } | |
594 | ||
595 | memcpy(buf, newcon, len); | |
596 | length = len; | |
597 | out3: | |
598 | kfree(newcon); | |
599 | out2: | |
600 | kfree(tcon); | |
601 | out: | |
602 | kfree(scon); | |
603 | return length; | |
604 | } | |
605 | ||
1872981b | 606 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 LT |
607 | { |
608 | char *scon, *tcon; | |
609 | u32 ssid, tsid, newsid; | |
610 | u16 tclass; | |
611 | ssize_t length; | |
612 | char *newcon; | |
613 | u32 len; | |
614 | ||
615 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
616 | if (length) | |
617 | return length; | |
618 | ||
619 | length = -ENOMEM; | |
c1a7368a | 620 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
621 | if (!scon) |
622 | return length; | |
1da177e4 | 623 | |
c1a7368a | 624 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
625 | if (!tcon) |
626 | goto out; | |
1da177e4 LT |
627 | |
628 | length = -EINVAL; | |
629 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
630 | goto out2; | |
631 | ||
c1a7368a | 632 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
1da177e4 LT |
633 | if (length < 0) |
634 | goto out2; | |
c1a7368a | 635 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
1da177e4 LT |
636 | if (length < 0) |
637 | goto out2; | |
638 | ||
639 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
640 | if (length < 0) | |
641 | goto out2; | |
642 | ||
643 | length = security_sid_to_context(newsid, &newcon, &len); | |
644 | if (length < 0) | |
645 | goto out2; | |
646 | ||
647 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
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_user(struct file *file, char *buf, size_t size) |
1da177e4 LT |
664 | { |
665 | char *con, *user, *ptr; | |
666 | u32 sid, *sids; | |
667 | ssize_t length; | |
668 | char *newcon; | |
669 | int i, rc; | |
670 | u32 len, nsids; | |
671 | ||
672 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
673 | if (length) | |
674 | return length; | |
675 | ||
676 | length = -ENOMEM; | |
c1a7368a | 677 | con = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
678 | if (!con) |
679 | return length; | |
1da177e4 | 680 | |
c1a7368a | 681 | user = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
682 | if (!user) |
683 | goto out; | |
1da177e4 LT |
684 | |
685 | length = -EINVAL; | |
686 | if (sscanf(buf, "%s %s", con, user) != 2) | |
687 | goto out2; | |
688 | ||
c1a7368a | 689 | length = security_context_to_sid(con, strlen(con) + 1, &sid); |
1da177e4 LT |
690 | if (length < 0) |
691 | goto out2; | |
692 | ||
693 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
694 | if (length < 0) | |
695 | goto out2; | |
696 | ||
697 | length = sprintf(buf, "%u", nsids) + 1; | |
698 | ptr = buf + length; | |
699 | for (i = 0; i < nsids; i++) { | |
700 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
701 | if (rc) { | |
702 | length = rc; | |
703 | goto out3; | |
704 | } | |
705 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
706 | kfree(newcon); | |
707 | length = -ERANGE; | |
708 | goto out3; | |
709 | } | |
710 | memcpy(ptr, newcon, len); | |
711 | kfree(newcon); | |
712 | ptr += len; | |
713 | length += len; | |
714 | } | |
715 | out3: | |
716 | kfree(sids); | |
717 | out2: | |
718 | kfree(user); | |
719 | out: | |
720 | kfree(con); | |
721 | return length; | |
722 | } | |
723 | ||
1872981b | 724 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 LT |
725 | { |
726 | char *scon, *tcon; | |
727 | u32 ssid, tsid, newsid; | |
728 | u16 tclass; | |
729 | ssize_t length; | |
730 | char *newcon; | |
731 | u32 len; | |
732 | ||
733 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
734 | if (length) | |
735 | return length; | |
736 | ||
737 | length = -ENOMEM; | |
c1a7368a | 738 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
739 | if (!scon) |
740 | return length; | |
1da177e4 | 741 | |
c1a7368a | 742 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
743 | if (!tcon) |
744 | goto out; | |
1da177e4 LT |
745 | |
746 | length = -EINVAL; | |
747 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
748 | goto out2; | |
749 | ||
c1a7368a | 750 | length = security_context_to_sid(scon, strlen(scon) + 1, &ssid); |
1da177e4 LT |
751 | if (length < 0) |
752 | goto out2; | |
c1a7368a | 753 | length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid); |
1da177e4 LT |
754 | if (length < 0) |
755 | goto out2; | |
756 | ||
757 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
758 | if (length < 0) | |
759 | goto out2; | |
760 | ||
761 | length = security_sid_to_context(newsid, &newcon, &len); | |
762 | if (length < 0) | |
763 | goto out2; | |
764 | ||
765 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
744ba35e EP |
766 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
767 | "payload max\n", __func__, len); | |
1da177e4 LT |
768 | length = -ERANGE; |
769 | goto out3; | |
770 | } | |
771 | ||
772 | memcpy(buf, newcon, len); | |
773 | length = len; | |
774 | out3: | |
775 | kfree(newcon); | |
776 | out2: | |
777 | kfree(tcon); | |
778 | out: | |
779 | kfree(scon); | |
780 | return length; | |
781 | } | |
782 | ||
783 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
784 | { | |
785 | struct inode *ret = new_inode(sb); | |
786 | ||
787 | if (ret) { | |
788 | ret->i_mode = mode; | |
1da177e4 LT |
789 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; |
790 | } | |
791 | return ret; | |
792 | } | |
793 | ||
1da177e4 LT |
794 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
795 | size_t count, loff_t *ppos) | |
796 | { | |
797 | char *page = NULL; | |
798 | ssize_t length; | |
1da177e4 LT |
799 | ssize_t ret; |
800 | int cur_enforcing; | |
d313f948 SS |
801 | struct inode *inode = filep->f_path.dentry->d_inode; |
802 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
803 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 804 | |
bb003079 | 805 | mutex_lock(&sel_mutex); |
1da177e4 | 806 | |
d313f948 SS |
807 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
808 | ret = -EINVAL; | |
809 | goto out; | |
810 | } | |
1da177e4 | 811 | |
1872981b EP |
812 | page = (char *)get_zeroed_page(GFP_KERNEL); |
813 | if (!page) { | |
1da177e4 LT |
814 | ret = -ENOMEM; |
815 | goto out; | |
816 | } | |
817 | ||
d313f948 | 818 | cur_enforcing = security_get_bool_value(index); |
1da177e4 LT |
819 | if (cur_enforcing < 0) { |
820 | ret = cur_enforcing; | |
821 | goto out; | |
822 | } | |
1da177e4 | 823 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
d313f948 | 824 | bool_pending_values[index]); |
68bdcf28 | 825 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 826 | out: |
bb003079 | 827 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
828 | if (page) |
829 | free_page((unsigned long)page); | |
830 | return ret; | |
831 | } | |
832 | ||
833 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
834 | size_t count, loff_t *ppos) | |
835 | { | |
836 | char *page = NULL; | |
d313f948 | 837 | ssize_t length; |
1da177e4 | 838 | int new_value; |
d313f948 SS |
839 | struct inode *inode = filep->f_path.dentry->d_inode; |
840 | unsigned index = inode->i_ino & SEL_INO_MASK; | |
841 | const char *name = filep->f_path.dentry->d_name.name; | |
1da177e4 | 842 | |
bb003079 | 843 | mutex_lock(&sel_mutex); |
1da177e4 LT |
844 | |
845 | length = task_has_security(current, SECURITY__SETBOOL); | |
846 | if (length) | |
847 | goto out; | |
848 | ||
d313f948 SS |
849 | if (index >= bool_num || strcmp(name, bool_pending_names[index])) { |
850 | length = -EINVAL; | |
851 | goto out; | |
852 | } | |
853 | ||
bfd51626 | 854 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
855 | length = -ENOMEM; |
856 | goto out; | |
857 | } | |
d313f948 | 858 | |
1da177e4 LT |
859 | if (*ppos != 0) { |
860 | /* No partial writes. */ | |
d313f948 | 861 | length = -EINVAL; |
1da177e4 LT |
862 | goto out; |
863 | } | |
1872981b | 864 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
865 | if (!page) { |
866 | length = -ENOMEM; | |
867 | goto out; | |
868 | } | |
869 | ||
d313f948 | 870 | length = -EFAULT; |
1da177e4 LT |
871 | if (copy_from_user(page, buf, count)) |
872 | goto out; | |
873 | ||
874 | length = -EINVAL; | |
875 | if (sscanf(page, "%d", &new_value) != 1) | |
876 | goto out; | |
877 | ||
878 | if (new_value) | |
879 | new_value = 1; | |
880 | ||
d313f948 | 881 | bool_pending_values[index] = new_value; |
1da177e4 LT |
882 | length = count; |
883 | ||
884 | out: | |
bb003079 | 885 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
886 | if (page) |
887 | free_page((unsigned long) page); | |
888 | return length; | |
889 | } | |
890 | ||
9c2e08c5 | 891 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
892 | .read = sel_read_bool, |
893 | .write = sel_write_bool, | |
57a62c23 | 894 | .llseek = generic_file_llseek, |
1da177e4 LT |
895 | }; |
896 | ||
897 | static ssize_t sel_commit_bools_write(struct file *filep, | |
898 | const char __user *buf, | |
899 | size_t count, loff_t *ppos) | |
900 | { | |
901 | char *page = NULL; | |
d313f948 | 902 | ssize_t length; |
1da177e4 LT |
903 | int new_value; |
904 | ||
bb003079 | 905 | mutex_lock(&sel_mutex); |
1da177e4 LT |
906 | |
907 | length = task_has_security(current, SECURITY__SETBOOL); | |
908 | if (length) | |
909 | goto out; | |
910 | ||
bfd51626 | 911 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
912 | length = -ENOMEM; |
913 | goto out; | |
914 | } | |
915 | if (*ppos != 0) { | |
916 | /* No partial writes. */ | |
917 | goto out; | |
918 | } | |
1872981b | 919 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
920 | if (!page) { |
921 | length = -ENOMEM; | |
922 | goto out; | |
923 | } | |
924 | ||
d313f948 | 925 | length = -EFAULT; |
1da177e4 LT |
926 | if (copy_from_user(page, buf, count)) |
927 | goto out; | |
928 | ||
929 | length = -EINVAL; | |
930 | if (sscanf(page, "%d", &new_value) != 1) | |
931 | goto out; | |
932 | ||
1872981b | 933 | if (new_value && bool_pending_values) |
1da177e4 | 934 | security_set_bools(bool_num, bool_pending_values); |
1da177e4 LT |
935 | |
936 | length = count; | |
937 | ||
938 | out: | |
bb003079 | 939 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
940 | if (page) |
941 | free_page((unsigned long) page); | |
942 | return length; | |
943 | } | |
944 | ||
9c2e08c5 | 945 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 946 | .write = sel_commit_bools_write, |
57a62c23 | 947 | .llseek = generic_file_llseek, |
1da177e4 LT |
948 | }; |
949 | ||
0c92d7c7 | 950 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 951 | { |
0955dc03 | 952 | struct list_head *node; |
1da177e4 LT |
953 | |
954 | spin_lock(&dcache_lock); | |
955 | node = de->d_subdirs.next; | |
956 | while (node != &de->d_subdirs) { | |
5160ee6f | 957 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
958 | list_del_init(node); |
959 | ||
960 | if (d->d_inode) { | |
961 | d = dget_locked(d); | |
962 | spin_unlock(&dcache_lock); | |
963 | d_delete(d); | |
964 | simple_unlink(de->d_inode, d); | |
965 | dput(d); | |
966 | spin_lock(&dcache_lock); | |
967 | } | |
968 | node = de->d_subdirs.next; | |
969 | } | |
970 | ||
971 | spin_unlock(&dcache_lock); | |
1da177e4 LT |
972 | } |
973 | ||
974 | #define BOOL_DIR_NAME "booleans" | |
975 | ||
976 | static int sel_make_bools(void) | |
977 | { | |
978 | int i, ret = 0; | |
979 | ssize_t len; | |
980 | struct dentry *dentry = NULL; | |
981 | struct dentry *dir = bool_dir; | |
982 | struct inode *inode = NULL; | |
983 | struct inode_security_struct *isec; | |
984 | char **names = NULL, *page; | |
985 | int num; | |
986 | int *values = NULL; | |
987 | u32 sid; | |
988 | ||
989 | /* remove any existing files */ | |
8007f102 XF |
990 | for (i = 0; i < bool_num; i++) |
991 | kfree(bool_pending_names[i]); | |
d313f948 | 992 | kfree(bool_pending_names); |
9a5f04bf | 993 | kfree(bool_pending_values); |
d313f948 | 994 | bool_pending_names = NULL; |
20c19e41 | 995 | bool_pending_values = NULL; |
1da177e4 | 996 | |
0c92d7c7 | 997 | sel_remove_entries(dir); |
1da177e4 | 998 | |
1872981b EP |
999 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1000 | if (!page) | |
1da177e4 LT |
1001 | return -ENOMEM; |
1002 | ||
1003 | ret = security_get_bools(&num, &names, &values); | |
1004 | if (ret != 0) | |
1005 | goto out; | |
1006 | ||
1007 | for (i = 0; i < num; i++) { | |
1008 | dentry = d_alloc_name(dir, names[i]); | |
1009 | if (!dentry) { | |
1010 | ret = -ENOMEM; | |
1011 | goto err; | |
1012 | } | |
1013 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1014 | if (!inode) { | |
1015 | ret = -ENOMEM; | |
1016 | goto err; | |
1017 | } | |
1018 | ||
1019 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1020 | if (len < 0) { | |
1021 | ret = -EINVAL; | |
1022 | goto err; | |
1023 | } else if (len >= PAGE_SIZE) { | |
1024 | ret = -ENAMETOOLONG; | |
1025 | goto err; | |
1026 | } | |
1872981b EP |
1027 | isec = (struct inode_security_struct *)inode->i_security; |
1028 | ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid); | |
1029 | if (ret) | |
1da177e4 LT |
1030 | goto err; |
1031 | isec->sid = sid; | |
1032 | isec->initialized = 1; | |
1033 | inode->i_fop = &sel_bool_ops; | |
bce34bc0 | 1034 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1035 | d_add(dentry, inode); |
1036 | } | |
1037 | bool_num = num; | |
d313f948 | 1038 | bool_pending_names = names; |
1da177e4 LT |
1039 | bool_pending_values = values; |
1040 | out: | |
1041 | free_page((unsigned long)page); | |
d313f948 SS |
1042 | return ret; |
1043 | err: | |
1da177e4 | 1044 | if (names) { |
9a5f04bf JJ |
1045 | for (i = 0; i < num; i++) |
1046 | kfree(names[i]); | |
1da177e4 LT |
1047 | kfree(names); |
1048 | } | |
20c19e41 | 1049 | kfree(values); |
0c92d7c7 | 1050 | sel_remove_entries(dir); |
1da177e4 LT |
1051 | ret = -ENOMEM; |
1052 | goto out; | |
1053 | } | |
1054 | ||
1055 | #define NULL_FILE_NAME "null" | |
1056 | ||
1872981b | 1057 | struct dentry *selinux_null; |
1da177e4 LT |
1058 | |
1059 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1060 | size_t count, loff_t *ppos) | |
1061 | { | |
1062 | char tmpbuf[TMPBUFLEN]; | |
1063 | ssize_t length; | |
1064 | ||
1065 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1066 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1067 | } | |
1068 | ||
1872981b EP |
1069 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1070 | const char __user *buf, | |
1da177e4 LT |
1071 | size_t count, loff_t *ppos) |
1072 | ||
1073 | { | |
1074 | char *page; | |
1075 | ssize_t ret; | |
1076 | int new_value; | |
1077 | ||
bfd51626 | 1078 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1079 | ret = -ENOMEM; |
1080 | goto out; | |
1081 | } | |
1082 | ||
1083 | if (*ppos != 0) { | |
1084 | /* No partial writes. */ | |
1085 | ret = -EINVAL; | |
1086 | goto out; | |
1087 | } | |
1088 | ||
1872981b | 1089 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1da177e4 LT |
1090 | if (!page) { |
1091 | ret = -ENOMEM; | |
1092 | goto out; | |
1093 | } | |
1094 | ||
1095 | if (copy_from_user(page, buf, count)) { | |
1096 | ret = -EFAULT; | |
1097 | goto out_free; | |
1098 | } | |
1099 | ||
1100 | if (sscanf(page, "%u", &new_value) != 1) { | |
1101 | ret = -EINVAL; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
1105 | if (new_value != avc_cache_threshold) { | |
1106 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1107 | if (ret) | |
1108 | goto out_free; | |
1109 | avc_cache_threshold = new_value; | |
1110 | } | |
1111 | ret = count; | |
1112 | out_free: | |
1113 | free_page((unsigned long)page); | |
1114 | out: | |
1115 | return ret; | |
1116 | } | |
1117 | ||
1118 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1119 | size_t count, loff_t *ppos) | |
1120 | { | |
1121 | char *page; | |
1122 | ssize_t ret = 0; | |
1123 | ||
1124 | page = (char *)__get_free_page(GFP_KERNEL); | |
1125 | if (!page) { | |
1126 | ret = -ENOMEM; | |
1127 | goto out; | |
1128 | } | |
1129 | ret = avc_get_hash_stats(page); | |
1130 | if (ret >= 0) | |
1131 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1132 | free_page((unsigned long)page); | |
1133 | out: | |
1134 | return ret; | |
1135 | } | |
1136 | ||
9c2e08c5 | 1137 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1138 | .read = sel_read_avc_cache_threshold, |
1139 | .write = sel_write_avc_cache_threshold, | |
57a62c23 | 1140 | .llseek = generic_file_llseek, |
1da177e4 LT |
1141 | }; |
1142 | ||
9c2e08c5 | 1143 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 | 1144 | .read = sel_read_avc_hash_stats, |
57a62c23 | 1145 | .llseek = generic_file_llseek, |
1da177e4 LT |
1146 | }; |
1147 | ||
1148 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1149 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1150 | { | |
1151 | int cpu; | |
1152 | ||
4f4b6c1a | 1153 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1154 | if (!cpu_possible(cpu)) |
1155 | continue; | |
1156 | *idx = cpu + 1; | |
1157 | return &per_cpu(avc_cache_stats, cpu); | |
1158 | } | |
1159 | return NULL; | |
1160 | } | |
1161 | ||
1162 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1163 | { | |
1164 | loff_t n = *pos - 1; | |
1165 | ||
1166 | if (*pos == 0) | |
1167 | return SEQ_START_TOKEN; | |
1168 | ||
1169 | return sel_avc_get_stat_idx(&n); | |
1170 | } | |
1171 | ||
1172 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1173 | { | |
1174 | return sel_avc_get_stat_idx(pos); | |
1175 | } | |
1176 | ||
1177 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1178 | { | |
1179 | struct avc_cache_stats *st = v; | |
1180 | ||
1181 | if (v == SEQ_START_TOKEN) | |
1182 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1183 | "frees\n"); | |
1184 | else | |
1185 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1186 | st->hits, st->misses, st->allocations, | |
1187 | st->reclaims, st->frees); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1192 | { } | |
1193 | ||
1996a109 | 1194 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1195 | .start = sel_avc_stats_seq_start, |
1196 | .next = sel_avc_stats_seq_next, | |
1197 | .show = sel_avc_stats_seq_show, | |
1198 | .stop = sel_avc_stats_seq_stop, | |
1199 | }; | |
1200 | ||
1201 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1202 | { | |
1203 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1204 | } | |
1205 | ||
9c2e08c5 | 1206 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1207 | .open = sel_open_avc_cache_stats, |
1208 | .read = seq_read, | |
1209 | .llseek = seq_lseek, | |
1210 | .release = seq_release, | |
1211 | }; | |
1212 | #endif | |
1213 | ||
1214 | static int sel_make_avc_files(struct dentry *dir) | |
1215 | { | |
1216 | int i, ret = 0; | |
1217 | static struct tree_descr files[] = { | |
1218 | { "cache_threshold", | |
1219 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1220 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1221 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1222 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1223 | #endif | |
1224 | }; | |
1225 | ||
6e20a64a | 1226 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1227 | struct inode *inode; |
1228 | struct dentry *dentry; | |
1229 | ||
1230 | dentry = d_alloc_name(dir, files[i].name); | |
1231 | if (!dentry) { | |
1232 | ret = -ENOMEM; | |
d6aafa65 | 1233 | goto out; |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1237 | if (!inode) { | |
1238 | ret = -ENOMEM; | |
d6aafa65 | 1239 | goto out; |
1da177e4 LT |
1240 | } |
1241 | inode->i_fop = files[i].ops; | |
6174eafc | 1242 | inode->i_ino = ++sel_last_ino; |
1da177e4 LT |
1243 | d_add(dentry, inode); |
1244 | } | |
1245 | out: | |
1246 | return ret; | |
1da177e4 LT |
1247 | } |
1248 | ||
1872981b | 1249 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1250 | size_t count, loff_t *ppos) |
1251 | { | |
1252 | struct inode *inode; | |
1253 | char *con; | |
1254 | u32 sid, len; | |
1255 | ssize_t ret; | |
1256 | ||
1257 | inode = file->f_path.dentry->d_inode; | |
1258 | sid = inode->i_ino&SEL_INO_MASK; | |
1259 | ret = security_sid_to_context(sid, &con, &len); | |
1260 | if (ret < 0) | |
1261 | return ret; | |
1262 | ||
1263 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1264 | kfree(con); | |
1265 | return ret; | |
1266 | } | |
1267 | ||
1268 | static const struct file_operations sel_initcon_ops = { | |
1269 | .read = sel_read_initcon, | |
57a62c23 | 1270 | .llseek = generic_file_llseek, |
f0ee2e46 JC |
1271 | }; |
1272 | ||
1273 | static int sel_make_initcon_files(struct dentry *dir) | |
1274 | { | |
1275 | int i, ret = 0; | |
1276 | ||
1277 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1278 | struct inode *inode; | |
1279 | struct dentry *dentry; | |
1280 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
1281 | if (!dentry) { | |
1282 | ret = -ENOMEM; | |
1283 | goto out; | |
1284 | } | |
1285 | ||
1286 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1287 | if (!inode) { | |
1288 | ret = -ENOMEM; | |
1289 | goto out; | |
1290 | } | |
1291 | inode->i_fop = &sel_initcon_ops; | |
1292 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1293 | d_add(dentry, inode); | |
1294 | } | |
1295 | out: | |
1296 | return ret; | |
1297 | } | |
1298 | ||
e47c8fc5 CP |
1299 | static inline unsigned int sel_div(unsigned long a, unsigned long b) |
1300 | { | |
1301 | return a / b - (a % b < 0); | |
1302 | } | |
1303 | ||
1304 | static inline unsigned long sel_class_to_ino(u16 class) | |
1305 | { | |
1306 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1307 | } | |
1308 | ||
1309 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1310 | { | |
1311 | return sel_div(ino & SEL_INO_MASK, SEL_VEC_MAX + 1); | |
1312 | } | |
1313 | ||
1314 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1315 | { | |
1316 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1317 | } | |
1318 | ||
1319 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1320 | { | |
1321 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1322 | } | |
1323 | ||
1872981b | 1324 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1325 | size_t count, loff_t *ppos) |
1326 | { | |
1327 | ssize_t rc, len; | |
1328 | char *page; | |
1329 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1330 | ||
1331 | page = (char *)__get_free_page(GFP_KERNEL); | |
1332 | if (!page) { | |
1333 | rc = -ENOMEM; | |
1334 | goto out; | |
1335 | } | |
1336 | ||
1337 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino)); | |
1338 | rc = simple_read_from_buffer(buf, count, ppos, page, len); | |
1339 | free_page((unsigned long)page); | |
1340 | out: | |
1341 | return rc; | |
1342 | } | |
1343 | ||
1344 | static const struct file_operations sel_class_ops = { | |
1345 | .read = sel_read_class, | |
57a62c23 | 1346 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1347 | }; |
1348 | ||
1872981b | 1349 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1350 | size_t count, loff_t *ppos) |
1351 | { | |
1352 | ssize_t rc, len; | |
1353 | char *page; | |
1354 | unsigned long ino = file->f_path.dentry->d_inode->i_ino; | |
1355 | ||
1356 | page = (char *)__get_free_page(GFP_KERNEL); | |
1357 | if (!page) { | |
1358 | rc = -ENOMEM; | |
1359 | goto out; | |
1360 | } | |
1361 | ||
1872981b | 1362 | len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino)); |
e47c8fc5 CP |
1363 | rc = simple_read_from_buffer(buf, count, ppos, page, len); |
1364 | free_page((unsigned long)page); | |
1365 | out: | |
1366 | return rc; | |
1367 | } | |
1368 | ||
1369 | static const struct file_operations sel_perm_ops = { | |
1370 | .read = sel_read_perm, | |
57a62c23 | 1371 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1372 | }; |
1373 | ||
3bb56b25 PM |
1374 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1375 | size_t count, loff_t *ppos) | |
1376 | { | |
1377 | int value; | |
1378 | char tmpbuf[TMPBUFLEN]; | |
1379 | ssize_t length; | |
1380 | unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; | |
1381 | ||
1382 | value = security_policycap_supported(i_ino & SEL_INO_MASK); | |
1383 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); | |
1384 | ||
1385 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1386 | } | |
1387 | ||
1388 | static const struct file_operations sel_policycap_ops = { | |
1389 | .read = sel_read_policycap, | |
57a62c23 | 1390 | .llseek = generic_file_llseek, |
3bb56b25 PM |
1391 | }; |
1392 | ||
e47c8fc5 CP |
1393 | static int sel_make_perm_files(char *objclass, int classvalue, |
1394 | struct dentry *dir) | |
1395 | { | |
1396 | int i, rc = 0, nperms; | |
1397 | char **perms; | |
1398 | ||
1399 | rc = security_get_permissions(objclass, &perms, &nperms); | |
1400 | if (rc) | |
1401 | goto out; | |
1402 | ||
1403 | for (i = 0; i < nperms; i++) { | |
1404 | struct inode *inode; | |
1405 | struct dentry *dentry; | |
1406 | ||
1407 | dentry = d_alloc_name(dir, perms[i]); | |
1408 | if (!dentry) { | |
1409 | rc = -ENOMEM; | |
1410 | goto out1; | |
1411 | } | |
1412 | ||
1413 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1414 | if (!inode) { | |
1415 | rc = -ENOMEM; | |
1416 | goto out1; | |
1417 | } | |
1418 | inode->i_fop = &sel_perm_ops; | |
1419 | /* i+1 since perm values are 1-indexed */ | |
c1a7368a | 1420 | inode->i_ino = sel_perm_to_ino(classvalue, i + 1); |
e47c8fc5 CP |
1421 | d_add(dentry, inode); |
1422 | } | |
1423 | ||
1424 | out1: | |
1425 | for (i = 0; i < nperms; i++) | |
1426 | kfree(perms[i]); | |
1427 | kfree(perms); | |
1428 | out: | |
1429 | return rc; | |
1430 | } | |
1431 | ||
1432 | static int sel_make_class_dir_entries(char *classname, int index, | |
1433 | struct dentry *dir) | |
1434 | { | |
1435 | struct dentry *dentry = NULL; | |
1436 | struct inode *inode = NULL; | |
1437 | int rc; | |
1438 | ||
1439 | dentry = d_alloc_name(dir, "index"); | |
1440 | if (!dentry) { | |
1441 | rc = -ENOMEM; | |
1442 | goto out; | |
1443 | } | |
1444 | ||
1445 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
1446 | if (!inode) { | |
1447 | rc = -ENOMEM; | |
1448 | goto out; | |
1449 | } | |
1450 | ||
1451 | inode->i_fop = &sel_class_ops; | |
1452 | inode->i_ino = sel_class_to_ino(index); | |
1453 | d_add(dentry, inode); | |
1454 | ||
1455 | dentry = d_alloc_name(dir, "perms"); | |
1456 | if (!dentry) { | |
1457 | rc = -ENOMEM; | |
1458 | goto out; | |
1459 | } | |
1460 | ||
1461 | rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino); | |
1462 | if (rc) | |
1463 | goto out; | |
1464 | ||
1465 | rc = sel_make_perm_files(classname, index, dentry); | |
1466 | ||
1467 | out: | |
1468 | return rc; | |
1469 | } | |
1470 | ||
1471 | static void sel_remove_classes(void) | |
1472 | { | |
1473 | struct list_head *class_node; | |
1474 | ||
1475 | list_for_each(class_node, &class_dir->d_subdirs) { | |
1476 | struct dentry *class_subdir = list_entry(class_node, | |
1477 | struct dentry, d_u.d_child); | |
1478 | struct list_head *class_subdir_node; | |
1479 | ||
1480 | list_for_each(class_subdir_node, &class_subdir->d_subdirs) { | |
1481 | struct dentry *d = list_entry(class_subdir_node, | |
1482 | struct dentry, d_u.d_child); | |
1483 | ||
1484 | if (d->d_inode) | |
1485 | if (d->d_inode->i_mode & S_IFDIR) | |
1486 | sel_remove_entries(d); | |
1487 | } | |
1488 | ||
1489 | sel_remove_entries(class_subdir); | |
1490 | } | |
1491 | ||
1492 | sel_remove_entries(class_dir); | |
1493 | } | |
1494 | ||
1495 | static int sel_make_classes(void) | |
1496 | { | |
1497 | int rc = 0, nclasses, i; | |
1498 | char **classes; | |
1499 | ||
1500 | /* delete any existing entries */ | |
1501 | sel_remove_classes(); | |
1502 | ||
1503 | rc = security_get_classes(&classes, &nclasses); | |
1504 | if (rc < 0) | |
1505 | goto out; | |
1506 | ||
1507 | /* +2 since classes are 1-indexed */ | |
c1a7368a | 1508 | last_class_ino = sel_class_to_ino(nclasses + 2); |
e47c8fc5 CP |
1509 | |
1510 | for (i = 0; i < nclasses; i++) { | |
1511 | struct dentry *class_name_dir; | |
1512 | ||
1513 | class_name_dir = d_alloc_name(class_dir, classes[i]); | |
1514 | if (!class_name_dir) { | |
1515 | rc = -ENOMEM; | |
1516 | goto out1; | |
1517 | } | |
1518 | ||
1519 | rc = sel_make_dir(class_dir->d_inode, class_name_dir, | |
1520 | &last_class_ino); | |
1521 | if (rc) | |
1522 | goto out1; | |
1523 | ||
1524 | /* i+1 since class values are 1-indexed */ | |
c1a7368a | 1525 | rc = sel_make_class_dir_entries(classes[i], i + 1, |
e47c8fc5 CP |
1526 | class_name_dir); |
1527 | if (rc) | |
1528 | goto out1; | |
1529 | } | |
1530 | ||
1531 | out1: | |
1532 | for (i = 0; i < nclasses; i++) | |
1533 | kfree(classes[i]); | |
1534 | kfree(classes); | |
1535 | out: | |
1536 | return rc; | |
1537 | } | |
1538 | ||
3bb56b25 PM |
1539 | static int sel_make_policycap(void) |
1540 | { | |
1541 | unsigned int iter; | |
1542 | struct dentry *dentry = NULL; | |
1543 | struct inode *inode = NULL; | |
1544 | ||
1545 | sel_remove_entries(policycap_dir); | |
1546 | ||
1547 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
1548 | if (iter < ARRAY_SIZE(policycap_names)) | |
1549 | dentry = d_alloc_name(policycap_dir, | |
1550 | policycap_names[iter]); | |
1551 | else | |
1552 | dentry = d_alloc_name(policycap_dir, "unknown"); | |
1553 | ||
1554 | if (dentry == NULL) | |
1555 | return -ENOMEM; | |
1556 | ||
1557 | inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); | |
1558 | if (inode == NULL) | |
1559 | return -ENOMEM; | |
1560 | ||
1561 | inode->i_fop = &sel_policycap_ops; | |
1562 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1563 | d_add(dentry, inode); | |
1564 | } | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
0dd4ae51 CP |
1569 | static int sel_make_dir(struct inode *dir, struct dentry *dentry, |
1570 | unsigned long *ino) | |
1da177e4 LT |
1571 | { |
1572 | int ret = 0; | |
1573 | struct inode *inode; | |
1574 | ||
edb20fb5 | 1575 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1576 | if (!inode) { |
1577 | ret = -ENOMEM; | |
1578 | goto out; | |
1579 | } | |
1580 | inode->i_op = &simple_dir_inode_operations; | |
1581 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1582 | inode->i_ino = ++(*ino); |
40e906f8 | 1583 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1584 | inc_nlink(inode); |
1da177e4 | 1585 | d_add(dentry, inode); |
edb20fb5 | 1586 | /* bump link count on parent directory, too */ |
d8c76e6f | 1587 | inc_nlink(dir); |
1da177e4 LT |
1588 | out: |
1589 | return ret; | |
1590 | } | |
1591 | ||
1872981b | 1592 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 LT |
1593 | { |
1594 | int ret; | |
1595 | struct dentry *dentry; | |
edb20fb5 | 1596 | struct inode *inode, *root_inode; |
1da177e4 LT |
1597 | struct inode_security_struct *isec; |
1598 | ||
1599 | static struct tree_descr selinux_files[] = { | |
1600 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1601 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1602 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1603 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1604 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1605 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1606 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1607 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1608 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1609 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1610 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1611 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1612 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
3f12070e EP |
1613 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1614 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
1da177e4 LT |
1615 | /* last one */ {""} |
1616 | }; | |
1617 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1618 | if (ret) | |
161ce45a | 1619 | goto err; |
1da177e4 | 1620 | |
edb20fb5 JM |
1621 | root_inode = sb->s_root->d_inode; |
1622 | ||
1da177e4 | 1623 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1624 | if (!dentry) { |
1625 | ret = -ENOMEM; | |
1626 | goto err; | |
1627 | } | |
1da177e4 | 1628 | |
0dd4ae51 | 1629 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
cde174a8 | 1630 | if (ret) |
161ce45a | 1631 | goto err; |
cde174a8 | 1632 | |
1da177e4 | 1633 | bool_dir = dentry; |
1da177e4 LT |
1634 | |
1635 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1636 | if (!dentry) { |
1637 | ret = -ENOMEM; | |
1638 | goto err; | |
1639 | } | |
1da177e4 LT |
1640 | |
1641 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1642 | if (!inode) { |
1643 | ret = -ENOMEM; | |
1644 | goto err; | |
1645 | } | |
6174eafc | 1646 | inode->i_ino = ++sel_last_ino; |
1872981b | 1647 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1648 | isec->sid = SECINITSID_DEVNULL; |
1649 | isec->sclass = SECCLASS_CHR_FILE; | |
1650 | isec->initialized = 1; | |
1651 | ||
1652 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1653 | d_add(dentry, inode); | |
1654 | selinux_null = dentry; | |
1655 | ||
1656 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1657 | if (!dentry) { |
1658 | ret = -ENOMEM; | |
1659 | goto err; | |
1660 | } | |
1da177e4 | 1661 | |
0dd4ae51 | 1662 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
1da177e4 | 1663 | if (ret) |
161ce45a | 1664 | goto err; |
1da177e4 LT |
1665 | |
1666 | ret = sel_make_avc_files(dentry); | |
1667 | if (ret) | |
161ce45a | 1668 | goto err; |
f0ee2e46 JC |
1669 | |
1670 | dentry = d_alloc_name(sb->s_root, "initial_contexts"); | |
1671 | if (!dentry) { | |
1672 | ret = -ENOMEM; | |
1673 | goto err; | |
1674 | } | |
1675 | ||
0dd4ae51 | 1676 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); |
f0ee2e46 JC |
1677 | if (ret) |
1678 | goto err; | |
1679 | ||
1680 | ret = sel_make_initcon_files(dentry); | |
1681 | if (ret) | |
1682 | goto err; | |
1683 | ||
e47c8fc5 CP |
1684 | dentry = d_alloc_name(sb->s_root, "class"); |
1685 | if (!dentry) { | |
1686 | ret = -ENOMEM; | |
1687 | goto err; | |
1688 | } | |
1689 | ||
1690 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1691 | if (ret) | |
1692 | goto err; | |
1693 | ||
1694 | class_dir = dentry; | |
1695 | ||
3bb56b25 PM |
1696 | dentry = d_alloc_name(sb->s_root, "policy_capabilities"); |
1697 | if (!dentry) { | |
1698 | ret = -ENOMEM; | |
1699 | goto err; | |
1700 | } | |
1701 | ||
1702 | ret = sel_make_dir(root_inode, dentry, &sel_last_ino); | |
1703 | if (ret) | |
1704 | goto err; | |
1705 | ||
1706 | policycap_dir = dentry; | |
1707 | ||
1da177e4 | 1708 | out: |
161ce45a JM |
1709 | return ret; |
1710 | err: | |
744ba35e EP |
1711 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
1712 | __func__); | |
161ce45a | 1713 | goto out; |
1da177e4 LT |
1714 | } |
1715 | ||
454e2398 DH |
1716 | static int sel_get_sb(struct file_system_type *fs_type, |
1717 | int flags, const char *dev_name, void *data, | |
1718 | struct vfsmount *mnt) | |
1da177e4 | 1719 | { |
454e2398 | 1720 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1721 | } |
1722 | ||
1723 | static struct file_system_type sel_fs_type = { | |
1724 | .name = "selinuxfs", | |
1725 | .get_sb = sel_get_sb, | |
1726 | .kill_sb = kill_litter_super, | |
1727 | }; | |
1728 | ||
1729 | struct vfsmount *selinuxfs_mount; | |
1730 | ||
1731 | static int __init init_sel_fs(void) | |
1732 | { | |
1733 | int err; | |
1734 | ||
1735 | if (!selinux_enabled) | |
1736 | return 0; | |
1737 | err = register_filesystem(&sel_fs_type); | |
1738 | if (!err) { | |
1739 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1740 | if (IS_ERR(selinuxfs_mount)) { | |
1741 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1742 | err = PTR_ERR(selinuxfs_mount); | |
1743 | selinuxfs_mount = NULL; | |
1744 | } | |
1745 | } | |
1746 | return err; | |
1747 | } | |
1748 | ||
1749 | __initcall(init_sel_fs); | |
1750 | ||
1751 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1752 | void exit_sel_fs(void) | |
1753 | { | |
1754 | unregister_filesystem(&sel_fs_type); | |
1755 | } | |
1756 | #endif |