Commit | Line | Data |
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1da177e4 LT |
1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
2 | * | |
3 | * Added conditional policy language extensions | |
4 | * | |
5 | * Copyright (C) 2003 - 2004 Tresys Technology, LLC | |
6 | * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/pagemap.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/fs.h> | |
bb003079 | 17 | #include <linux/mutex.h> |
1da177e4 LT |
18 | #include <linux/init.h> |
19 | #include <linux/string.h> | |
20 | #include <linux/security.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/percpu.h> | |
af601e46 | 24 | #include <linux/audit.h> |
1da177e4 LT |
25 | #include <asm/uaccess.h> |
26 | #include <asm/semaphore.h> | |
27 | ||
28 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
29 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
30 | ||
31 | #include "flask.h" | |
32 | #include "avc.h" | |
33 | #include "avc_ss.h" | |
34 | #include "security.h" | |
35 | #include "objsec.h" | |
36 | #include "conditional.h" | |
37 | ||
38 | unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; | |
39 | ||
4e5ab4cb JM |
40 | #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT |
41 | #define SELINUX_COMPAT_NET_VALUE 0 | |
42 | #else | |
43 | #define SELINUX_COMPAT_NET_VALUE 1 | |
44 | #endif | |
45 | ||
46 | int selinux_compat_net = SELINUX_COMPAT_NET_VALUE; | |
47 | ||
1da177e4 LT |
48 | static int __init checkreqprot_setup(char *str) |
49 | { | |
50 | selinux_checkreqprot = simple_strtoul(str,NULL,0) ? 1 : 0; | |
51 | return 1; | |
52 | } | |
53 | __setup("checkreqprot=", checkreqprot_setup); | |
54 | ||
4e5ab4cb JM |
55 | static int __init selinux_compat_net_setup(char *str) |
56 | { | |
57 | selinux_compat_net = simple_strtoul(str,NULL,0) ? 1 : 0; | |
58 | return 1; | |
59 | } | |
60 | __setup("selinux_compat_net=", selinux_compat_net_setup); | |
61 | ||
1da177e4 | 62 | |
bb003079 | 63 | static DEFINE_MUTEX(sel_mutex); |
1da177e4 LT |
64 | |
65 | /* global data for booleans */ | |
66 | static struct dentry *bool_dir = NULL; | |
67 | static int bool_num = 0; | |
68 | static int *bool_pending_values = NULL; | |
69 | ||
70 | extern void selnl_notify_setenforce(int val); | |
71 | ||
72 | /* Check whether a task is allowed to use a security operation. */ | |
73 | static int task_has_security(struct task_struct *tsk, | |
74 | u32 perms) | |
75 | { | |
76 | struct task_security_struct *tsec; | |
77 | ||
78 | tsec = tsk->security; | |
79 | if (!tsec) | |
80 | return -EACCES; | |
81 | ||
82 | return avc_has_perm(tsec->sid, SECINITSID_SECURITY, | |
83 | SECCLASS_SECURITY, perms, NULL); | |
84 | } | |
85 | ||
86 | enum sel_inos { | |
87 | SEL_ROOT_INO = 2, | |
88 | SEL_LOAD, /* load policy */ | |
89 | SEL_ENFORCE, /* get or set enforcing status */ | |
90 | SEL_CONTEXT, /* validate context */ | |
91 | SEL_ACCESS, /* compute access decision */ | |
92 | SEL_CREATE, /* compute create labeling decision */ | |
93 | SEL_RELABEL, /* compute relabeling decision */ | |
94 | SEL_USER, /* compute reachable user contexts */ | |
95 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
96 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
97 | SEL_MLS, /* return if MLS policy is enabled */ | |
98 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
99 | SEL_AVC, /* AVC management directory */ | |
100 | SEL_MEMBER, /* compute polyinstantiation membership decision */ | |
101 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 102 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
1da177e4 LT |
103 | }; |
104 | ||
105 | #define TMPBUFLEN 12 | |
106 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
107 | size_t count, loff_t *ppos) | |
108 | { | |
109 | char tmpbuf[TMPBUFLEN]; | |
110 | ssize_t length; | |
111 | ||
112 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_enforcing); | |
113 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
114 | } | |
115 | ||
116 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
117 | static ssize_t sel_write_enforce(struct file * file, const char __user * buf, | |
118 | size_t count, loff_t *ppos) | |
119 | ||
120 | { | |
121 | char *page; | |
122 | ssize_t length; | |
123 | int new_value; | |
124 | ||
bfd51626 | 125 | if (count >= PAGE_SIZE) |
1da177e4 LT |
126 | return -ENOMEM; |
127 | if (*ppos != 0) { | |
128 | /* No partial writes. */ | |
129 | return -EINVAL; | |
130 | } | |
131 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
132 | if (!page) | |
133 | return -ENOMEM; | |
134 | length = -EFAULT; | |
135 | if (copy_from_user(page, buf, count)) | |
136 | goto out; | |
137 | ||
138 | length = -EINVAL; | |
139 | if (sscanf(page, "%d", &new_value) != 1) | |
140 | goto out; | |
141 | ||
142 | if (new_value != selinux_enforcing) { | |
143 | length = task_has_security(current, SECURITY__SETENFORCE); | |
144 | if (length) | |
145 | goto out; | |
af601e46 SG |
146 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
147 | "enforcing=%d old_enforcing=%d auid=%u", new_value, | |
148 | selinux_enforcing, | |
149 | audit_get_loginuid(current->audit_context)); | |
1da177e4 LT |
150 | selinux_enforcing = new_value; |
151 | if (selinux_enforcing) | |
152 | avc_ss_reset(0); | |
153 | selnl_notify_setenforce(selinux_enforcing); | |
154 | } | |
155 | length = count; | |
156 | out: | |
157 | free_page((unsigned long) page); | |
158 | return length; | |
159 | } | |
160 | #else | |
161 | #define sel_write_enforce NULL | |
162 | #endif | |
163 | ||
9c2e08c5 | 164 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
165 | .read = sel_read_enforce, |
166 | .write = sel_write_enforce, | |
167 | }; | |
168 | ||
169 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
170 | static ssize_t sel_write_disable(struct file * file, const char __user * buf, | |
171 | size_t count, loff_t *ppos) | |
172 | ||
173 | { | |
174 | char *page; | |
175 | ssize_t length; | |
176 | int new_value; | |
177 | extern int selinux_disable(void); | |
178 | ||
bfd51626 | 179 | if (count >= PAGE_SIZE) |
1da177e4 LT |
180 | return -ENOMEM; |
181 | if (*ppos != 0) { | |
182 | /* No partial writes. */ | |
183 | return -EINVAL; | |
184 | } | |
185 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
186 | if (!page) | |
187 | return -ENOMEM; | |
188 | length = -EFAULT; | |
189 | if (copy_from_user(page, buf, count)) | |
190 | goto out; | |
191 | ||
192 | length = -EINVAL; | |
193 | if (sscanf(page, "%d", &new_value) != 1) | |
194 | goto out; | |
195 | ||
196 | if (new_value) { | |
197 | length = selinux_disable(); | |
198 | if (length < 0) | |
199 | goto out; | |
af601e46 SG |
200 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, |
201 | "selinux=0 auid=%u", | |
202 | audit_get_loginuid(current->audit_context)); | |
1da177e4 LT |
203 | } |
204 | ||
205 | length = count; | |
206 | out: | |
207 | free_page((unsigned long) page); | |
208 | return length; | |
209 | } | |
210 | #else | |
211 | #define sel_write_disable NULL | |
212 | #endif | |
213 | ||
9c2e08c5 | 214 | static const struct file_operations sel_disable_ops = { |
1da177e4 LT |
215 | .write = sel_write_disable, |
216 | }; | |
217 | ||
218 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
219 | size_t count, loff_t *ppos) | |
220 | { | |
221 | char tmpbuf[TMPBUFLEN]; | |
222 | ssize_t length; | |
223 | ||
224 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
225 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
226 | } | |
227 | ||
9c2e08c5 | 228 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 LT |
229 | .read = sel_read_policyvers, |
230 | }; | |
231 | ||
232 | /* declaration for sel_write_load */ | |
233 | static int sel_make_bools(void); | |
234 | ||
235 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
236 | size_t count, loff_t *ppos) | |
237 | { | |
238 | char tmpbuf[TMPBUFLEN]; | |
239 | ssize_t length; | |
240 | ||
241 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_mls_enabled); | |
242 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
243 | } | |
244 | ||
9c2e08c5 | 245 | static const struct file_operations sel_mls_ops = { |
1da177e4 LT |
246 | .read = sel_read_mls, |
247 | }; | |
248 | ||
249 | static ssize_t sel_write_load(struct file * file, const char __user * buf, | |
250 | size_t count, loff_t *ppos) | |
251 | ||
252 | { | |
253 | int ret; | |
254 | ssize_t length; | |
255 | void *data = NULL; | |
256 | ||
bb003079 | 257 | mutex_lock(&sel_mutex); |
1da177e4 LT |
258 | |
259 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
260 | if (length) | |
261 | goto out; | |
262 | ||
263 | if (*ppos != 0) { | |
264 | /* No partial writes. */ | |
265 | length = -EINVAL; | |
266 | goto out; | |
267 | } | |
268 | ||
bfd51626 | 269 | if ((count > 64 * 1024 * 1024) |
1da177e4 LT |
270 | || (data = vmalloc(count)) == NULL) { |
271 | length = -ENOMEM; | |
272 | goto out; | |
273 | } | |
274 | ||
275 | length = -EFAULT; | |
276 | if (copy_from_user(data, buf, count) != 0) | |
277 | goto out; | |
278 | ||
279 | length = security_load_policy(data, count); | |
280 | if (length) | |
281 | goto out; | |
282 | ||
283 | ret = sel_make_bools(); | |
284 | if (ret) | |
285 | length = ret; | |
286 | else | |
287 | length = count; | |
af601e46 SG |
288 | audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
289 | "policy loaded auid=%u", | |
290 | audit_get_loginuid(current->audit_context)); | |
1da177e4 | 291 | out: |
bb003079 | 292 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
293 | vfree(data); |
294 | return length; | |
295 | } | |
296 | ||
9c2e08c5 | 297 | static const struct file_operations sel_load_ops = { |
1da177e4 LT |
298 | .write = sel_write_load, |
299 | }; | |
300 | ||
ce9982d0 | 301 | static ssize_t sel_write_context(struct file * file, char *buf, size_t size) |
1da177e4 | 302 | { |
ce9982d0 SS |
303 | char *canon; |
304 | u32 sid, len; | |
1da177e4 LT |
305 | ssize_t length; |
306 | ||
307 | length = task_has_security(current, SECURITY__CHECK_CONTEXT); | |
308 | if (length) | |
309 | return length; | |
310 | ||
ce9982d0 SS |
311 | length = security_context_to_sid(buf, size, &sid); |
312 | if (length < 0) | |
313 | return length; | |
1da177e4 | 314 | |
ce9982d0 | 315 | length = security_sid_to_context(sid, &canon, &len); |
1da177e4 | 316 | if (length < 0) |
ce9982d0 SS |
317 | return length; |
318 | ||
319 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
320 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
321 | "max\n", __FUNCTION__, len); | |
322 | length = -ERANGE; | |
1da177e4 | 323 | goto out; |
ce9982d0 | 324 | } |
1da177e4 | 325 | |
ce9982d0 SS |
326 | memcpy(buf, canon, len); |
327 | length = len; | |
1da177e4 | 328 | out: |
ce9982d0 | 329 | kfree(canon); |
1da177e4 LT |
330 | return length; |
331 | } | |
332 | ||
1da177e4 LT |
333 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
334 | size_t count, loff_t *ppos) | |
335 | { | |
336 | char tmpbuf[TMPBUFLEN]; | |
337 | ssize_t length; | |
338 | ||
339 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", selinux_checkreqprot); | |
340 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
341 | } | |
342 | ||
343 | static ssize_t sel_write_checkreqprot(struct file * file, const char __user * buf, | |
344 | size_t count, loff_t *ppos) | |
345 | { | |
346 | char *page; | |
347 | ssize_t length; | |
348 | unsigned int new_value; | |
349 | ||
350 | length = task_has_security(current, SECURITY__SETCHECKREQPROT); | |
351 | if (length) | |
352 | return length; | |
353 | ||
bfd51626 | 354 | if (count >= PAGE_SIZE) |
1da177e4 LT |
355 | return -ENOMEM; |
356 | if (*ppos != 0) { | |
357 | /* No partial writes. */ | |
358 | return -EINVAL; | |
359 | } | |
360 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
361 | if (!page) | |
362 | return -ENOMEM; | |
363 | length = -EFAULT; | |
364 | if (copy_from_user(page, buf, count)) | |
365 | goto out; | |
366 | ||
367 | length = -EINVAL; | |
368 | if (sscanf(page, "%u", &new_value) != 1) | |
369 | goto out; | |
370 | ||
371 | selinux_checkreqprot = new_value ? 1 : 0; | |
372 | length = count; | |
373 | out: | |
374 | free_page((unsigned long) page); | |
375 | return length; | |
376 | } | |
9c2e08c5 | 377 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
378 | .read = sel_read_checkreqprot, |
379 | .write = sel_write_checkreqprot, | |
380 | }; | |
381 | ||
4e5ab4cb JM |
382 | static ssize_t sel_read_compat_net(struct file *filp, char __user *buf, |
383 | size_t count, loff_t *ppos) | |
384 | { | |
385 | char tmpbuf[TMPBUFLEN]; | |
386 | ssize_t length; | |
387 | ||
388 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", selinux_compat_net); | |
389 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
390 | } | |
391 | ||
392 | static ssize_t sel_write_compat_net(struct file * file, const char __user * buf, | |
393 | size_t count, loff_t *ppos) | |
394 | { | |
395 | char *page; | |
396 | ssize_t length; | |
397 | int new_value; | |
398 | ||
399 | length = task_has_security(current, SECURITY__LOAD_POLICY); | |
400 | if (length) | |
401 | return length; | |
402 | ||
403 | if (count >= PAGE_SIZE) | |
404 | return -ENOMEM; | |
405 | if (*ppos != 0) { | |
406 | /* No partial writes. */ | |
407 | return -EINVAL; | |
408 | } | |
409 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
410 | if (!page) | |
411 | return -ENOMEM; | |
412 | length = -EFAULT; | |
413 | if (copy_from_user(page, buf, count)) | |
414 | goto out; | |
415 | ||
416 | length = -EINVAL; | |
417 | if (sscanf(page, "%d", &new_value) != 1) | |
418 | goto out; | |
419 | ||
420 | selinux_compat_net = new_value ? 1 : 0; | |
421 | length = count; | |
422 | out: | |
423 | free_page((unsigned long) page); | |
424 | return length; | |
425 | } | |
9c2e08c5 | 426 | static const struct file_operations sel_compat_net_ops = { |
4e5ab4cb JM |
427 | .read = sel_read_compat_net, |
428 | .write = sel_write_compat_net, | |
429 | }; | |
430 | ||
1da177e4 LT |
431 | /* |
432 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
433 | */ | |
434 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size); | |
435 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size); | |
436 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size); | |
437 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size); | |
438 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size); | |
439 | ||
440 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
441 | [SEL_ACCESS] = sel_write_access, | |
442 | [SEL_CREATE] = sel_write_create, | |
443 | [SEL_RELABEL] = sel_write_relabel, | |
444 | [SEL_USER] = sel_write_user, | |
445 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 446 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
447 | }; |
448 | ||
449 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
450 | { | |
3d5ff529 | 451 | ino_t ino = file->f_path.dentry->d_inode->i_ino; |
1da177e4 LT |
452 | char *data; |
453 | ssize_t rv; | |
454 | ||
6e20a64a | 455 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
456 | return -EINVAL; |
457 | ||
458 | data = simple_transaction_get(file, buf, size); | |
459 | if (IS_ERR(data)) | |
460 | return PTR_ERR(data); | |
461 | ||
462 | rv = write_op[ino](file, data, size); | |
463 | if (rv>0) { | |
464 | simple_transaction_set(file, rv); | |
465 | rv = size; | |
466 | } | |
467 | return rv; | |
468 | } | |
469 | ||
9c2e08c5 | 470 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
471 | .write = selinux_transaction_write, |
472 | .read = simple_transaction_read, | |
473 | .release = simple_transaction_release, | |
474 | }; | |
475 | ||
476 | /* | |
477 | * payload - write methods | |
478 | * If the method has a response, the response should be put in buf, | |
479 | * and the length returned. Otherwise return 0 or and -error. | |
480 | */ | |
481 | ||
482 | static ssize_t sel_write_access(struct file * file, char *buf, size_t size) | |
483 | { | |
484 | char *scon, *tcon; | |
485 | u32 ssid, tsid; | |
486 | u16 tclass; | |
487 | u32 req; | |
488 | struct av_decision avd; | |
489 | ssize_t length; | |
490 | ||
491 | length = task_has_security(current, SECURITY__COMPUTE_AV); | |
492 | if (length) | |
493 | return length; | |
494 | ||
495 | length = -ENOMEM; | |
89d155ef | 496 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
497 | if (!scon) |
498 | return length; | |
1da177e4 | 499 | |
89d155ef | 500 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
501 | if (!tcon) |
502 | goto out; | |
1da177e4 LT |
503 | |
504 | length = -EINVAL; | |
505 | if (sscanf(buf, "%s %s %hu %x", scon, tcon, &tclass, &req) != 4) | |
506 | goto out2; | |
507 | ||
508 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
509 | if (length < 0) | |
510 | goto out2; | |
511 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
512 | if (length < 0) | |
513 | goto out2; | |
514 | ||
515 | length = security_compute_av(ssid, tsid, tclass, req, &avd); | |
516 | if (length < 0) | |
517 | goto out2; | |
518 | ||
519 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
520 | "%x %x %x %x %u", | |
521 | avd.allowed, avd.decided, | |
522 | avd.auditallow, avd.auditdeny, | |
523 | avd.seqno); | |
524 | out2: | |
525 | kfree(tcon); | |
526 | out: | |
527 | kfree(scon); | |
528 | return length; | |
529 | } | |
530 | ||
531 | static ssize_t sel_write_create(struct file * file, char *buf, size_t size) | |
532 | { | |
533 | char *scon, *tcon; | |
534 | u32 ssid, tsid, newsid; | |
535 | u16 tclass; | |
536 | ssize_t length; | |
537 | char *newcon; | |
538 | u32 len; | |
539 | ||
540 | length = task_has_security(current, SECURITY__COMPUTE_CREATE); | |
541 | if (length) | |
542 | return length; | |
543 | ||
544 | length = -ENOMEM; | |
89d155ef | 545 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
546 | if (!scon) |
547 | return length; | |
1da177e4 | 548 | |
89d155ef | 549 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
550 | if (!tcon) |
551 | goto out; | |
1da177e4 LT |
552 | |
553 | length = -EINVAL; | |
554 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
555 | goto out2; | |
556 | ||
557 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
558 | if (length < 0) | |
559 | goto out2; | |
560 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
561 | if (length < 0) | |
562 | goto out2; | |
563 | ||
564 | length = security_transition_sid(ssid, tsid, tclass, &newsid); | |
565 | if (length < 0) | |
566 | goto out2; | |
567 | ||
568 | length = security_sid_to_context(newsid, &newcon, &len); | |
569 | if (length < 0) | |
570 | goto out2; | |
571 | ||
572 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
573 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
574 | "max\n", __FUNCTION__, len); | |
575 | length = -ERANGE; | |
576 | goto out3; | |
577 | } | |
578 | ||
579 | memcpy(buf, newcon, len); | |
580 | length = len; | |
581 | out3: | |
582 | kfree(newcon); | |
583 | out2: | |
584 | kfree(tcon); | |
585 | out: | |
586 | kfree(scon); | |
587 | return length; | |
588 | } | |
589 | ||
590 | static ssize_t sel_write_relabel(struct file * file, char *buf, size_t size) | |
591 | { | |
592 | char *scon, *tcon; | |
593 | u32 ssid, tsid, newsid; | |
594 | u16 tclass; | |
595 | ssize_t length; | |
596 | char *newcon; | |
597 | u32 len; | |
598 | ||
599 | length = task_has_security(current, SECURITY__COMPUTE_RELABEL); | |
600 | if (length) | |
601 | return length; | |
602 | ||
603 | length = -ENOMEM; | |
89d155ef | 604 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
605 | if (!scon) |
606 | return length; | |
1da177e4 | 607 | |
89d155ef | 608 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
609 | if (!tcon) |
610 | goto out; | |
1da177e4 LT |
611 | |
612 | length = -EINVAL; | |
613 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
614 | goto out2; | |
615 | ||
616 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
617 | if (length < 0) | |
618 | goto out2; | |
619 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
620 | if (length < 0) | |
621 | goto out2; | |
622 | ||
623 | length = security_change_sid(ssid, tsid, tclass, &newsid); | |
624 | if (length < 0) | |
625 | goto out2; | |
626 | ||
627 | length = security_sid_to_context(newsid, &newcon, &len); | |
628 | if (length < 0) | |
629 | goto out2; | |
630 | ||
631 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
632 | length = -ERANGE; | |
633 | goto out3; | |
634 | } | |
635 | ||
636 | memcpy(buf, newcon, len); | |
637 | length = len; | |
638 | out3: | |
639 | kfree(newcon); | |
640 | out2: | |
641 | kfree(tcon); | |
642 | out: | |
643 | kfree(scon); | |
644 | return length; | |
645 | } | |
646 | ||
647 | static ssize_t sel_write_user(struct file * file, char *buf, size_t size) | |
648 | { | |
649 | char *con, *user, *ptr; | |
650 | u32 sid, *sids; | |
651 | ssize_t length; | |
652 | char *newcon; | |
653 | int i, rc; | |
654 | u32 len, nsids; | |
655 | ||
656 | length = task_has_security(current, SECURITY__COMPUTE_USER); | |
657 | if (length) | |
658 | return length; | |
659 | ||
660 | length = -ENOMEM; | |
89d155ef | 661 | con = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
662 | if (!con) |
663 | return length; | |
1da177e4 | 664 | |
89d155ef | 665 | user = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
666 | if (!user) |
667 | goto out; | |
1da177e4 LT |
668 | |
669 | length = -EINVAL; | |
670 | if (sscanf(buf, "%s %s", con, user) != 2) | |
671 | goto out2; | |
672 | ||
673 | length = security_context_to_sid(con, strlen(con)+1, &sid); | |
674 | if (length < 0) | |
675 | goto out2; | |
676 | ||
677 | length = security_get_user_sids(sid, user, &sids, &nsids); | |
678 | if (length < 0) | |
679 | goto out2; | |
680 | ||
681 | length = sprintf(buf, "%u", nsids) + 1; | |
682 | ptr = buf + length; | |
683 | for (i = 0; i < nsids; i++) { | |
684 | rc = security_sid_to_context(sids[i], &newcon, &len); | |
685 | if (rc) { | |
686 | length = rc; | |
687 | goto out3; | |
688 | } | |
689 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
690 | kfree(newcon); | |
691 | length = -ERANGE; | |
692 | goto out3; | |
693 | } | |
694 | memcpy(ptr, newcon, len); | |
695 | kfree(newcon); | |
696 | ptr += len; | |
697 | length += len; | |
698 | } | |
699 | out3: | |
700 | kfree(sids); | |
701 | out2: | |
702 | kfree(user); | |
703 | out: | |
704 | kfree(con); | |
705 | return length; | |
706 | } | |
707 | ||
708 | static ssize_t sel_write_member(struct file * file, char *buf, size_t size) | |
709 | { | |
710 | char *scon, *tcon; | |
711 | u32 ssid, tsid, newsid; | |
712 | u16 tclass; | |
713 | ssize_t length; | |
714 | char *newcon; | |
715 | u32 len; | |
716 | ||
717 | length = task_has_security(current, SECURITY__COMPUTE_MEMBER); | |
718 | if (length) | |
719 | return length; | |
720 | ||
721 | length = -ENOMEM; | |
89d155ef | 722 | scon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
723 | if (!scon) |
724 | return length; | |
1da177e4 | 725 | |
89d155ef | 726 | tcon = kzalloc(size+1, GFP_KERNEL); |
1da177e4 LT |
727 | if (!tcon) |
728 | goto out; | |
1da177e4 LT |
729 | |
730 | length = -EINVAL; | |
731 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
732 | goto out2; | |
733 | ||
734 | length = security_context_to_sid(scon, strlen(scon)+1, &ssid); | |
735 | if (length < 0) | |
736 | goto out2; | |
737 | length = security_context_to_sid(tcon, strlen(tcon)+1, &tsid); | |
738 | if (length < 0) | |
739 | goto out2; | |
740 | ||
741 | length = security_member_sid(ssid, tsid, tclass, &newsid); | |
742 | if (length < 0) | |
743 | goto out2; | |
744 | ||
745 | length = security_sid_to_context(newsid, &newcon, &len); | |
746 | if (length < 0) | |
747 | goto out2; | |
748 | ||
749 | if (len > SIMPLE_TRANSACTION_LIMIT) { | |
750 | printk(KERN_ERR "%s: context size (%u) exceeds payload " | |
751 | "max\n", __FUNCTION__, len); | |
752 | length = -ERANGE; | |
753 | goto out3; | |
754 | } | |
755 | ||
756 | memcpy(buf, newcon, len); | |
757 | length = len; | |
758 | out3: | |
759 | kfree(newcon); | |
760 | out2: | |
761 | kfree(tcon); | |
762 | out: | |
763 | kfree(scon); | |
764 | return length; | |
765 | } | |
766 | ||
767 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
768 | { | |
769 | struct inode *ret = new_inode(sb); | |
770 | ||
771 | if (ret) { | |
772 | ret->i_mode = mode; | |
773 | ret->i_uid = ret->i_gid = 0; | |
1da177e4 LT |
774 | ret->i_blocks = 0; |
775 | ret->i_atime = ret->i_mtime = ret->i_ctime = CURRENT_TIME; | |
776 | } | |
777 | return ret; | |
778 | } | |
779 | ||
780 | #define BOOL_INO_OFFSET 30 | |
781 | ||
782 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, | |
783 | size_t count, loff_t *ppos) | |
784 | { | |
785 | char *page = NULL; | |
786 | ssize_t length; | |
1da177e4 LT |
787 | ssize_t ret; |
788 | int cur_enforcing; | |
789 | struct inode *inode; | |
790 | ||
bb003079 | 791 | mutex_lock(&sel_mutex); |
1da177e4 LT |
792 | |
793 | ret = -EFAULT; | |
794 | ||
795 | /* check to see if this file has been deleted */ | |
796 | if (!filep->f_op) | |
797 | goto out; | |
798 | ||
bfd51626 | 799 | if (count > PAGE_SIZE) { |
1da177e4 LT |
800 | ret = -EINVAL; |
801 | goto out; | |
802 | } | |
803 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) { | |
804 | ret = -ENOMEM; | |
805 | goto out; | |
806 | } | |
807 | ||
3d5ff529 | 808 | inode = filep->f_path.dentry->d_inode; |
1da177e4 LT |
809 | cur_enforcing = security_get_bool_value(inode->i_ino - BOOL_INO_OFFSET); |
810 | if (cur_enforcing < 0) { | |
811 | ret = cur_enforcing; | |
812 | goto out; | |
813 | } | |
814 | ||
815 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, | |
816 | bool_pending_values[inode->i_ino - BOOL_INO_OFFSET]); | |
68bdcf28 | 817 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 818 | out: |
bb003079 | 819 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
820 | if (page) |
821 | free_page((unsigned long)page); | |
822 | return ret; | |
823 | } | |
824 | ||
825 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
826 | size_t count, loff_t *ppos) | |
827 | { | |
828 | char *page = NULL; | |
829 | ssize_t length = -EFAULT; | |
830 | int new_value; | |
831 | struct inode *inode; | |
832 | ||
bb003079 | 833 | mutex_lock(&sel_mutex); |
1da177e4 LT |
834 | |
835 | length = task_has_security(current, SECURITY__SETBOOL); | |
836 | if (length) | |
837 | goto out; | |
838 | ||
839 | /* check to see if this file has been deleted */ | |
840 | if (!filep->f_op) | |
841 | goto out; | |
842 | ||
bfd51626 | 843 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
844 | length = -ENOMEM; |
845 | goto out; | |
846 | } | |
847 | if (*ppos != 0) { | |
848 | /* No partial writes. */ | |
849 | goto out; | |
850 | } | |
851 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
852 | if (!page) { | |
853 | length = -ENOMEM; | |
854 | goto out; | |
855 | } | |
856 | ||
857 | if (copy_from_user(page, buf, count)) | |
858 | goto out; | |
859 | ||
860 | length = -EINVAL; | |
861 | if (sscanf(page, "%d", &new_value) != 1) | |
862 | goto out; | |
863 | ||
864 | if (new_value) | |
865 | new_value = 1; | |
866 | ||
3d5ff529 | 867 | inode = filep->f_path.dentry->d_inode; |
1da177e4 LT |
868 | bool_pending_values[inode->i_ino - BOOL_INO_OFFSET] = new_value; |
869 | length = count; | |
870 | ||
871 | out: | |
bb003079 | 872 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
873 | if (page) |
874 | free_page((unsigned long) page); | |
875 | return length; | |
876 | } | |
877 | ||
9c2e08c5 | 878 | static const struct file_operations sel_bool_ops = { |
1da177e4 LT |
879 | .read = sel_read_bool, |
880 | .write = sel_write_bool, | |
881 | }; | |
882 | ||
883 | static ssize_t sel_commit_bools_write(struct file *filep, | |
884 | const char __user *buf, | |
885 | size_t count, loff_t *ppos) | |
886 | { | |
887 | char *page = NULL; | |
888 | ssize_t length = -EFAULT; | |
889 | int new_value; | |
890 | ||
bb003079 | 891 | mutex_lock(&sel_mutex); |
1da177e4 LT |
892 | |
893 | length = task_has_security(current, SECURITY__SETBOOL); | |
894 | if (length) | |
895 | goto out; | |
896 | ||
897 | /* check to see if this file has been deleted */ | |
898 | if (!filep->f_op) | |
899 | goto out; | |
900 | ||
bfd51626 | 901 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
902 | length = -ENOMEM; |
903 | goto out; | |
904 | } | |
905 | if (*ppos != 0) { | |
906 | /* No partial writes. */ | |
907 | goto out; | |
908 | } | |
909 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
910 | if (!page) { | |
911 | length = -ENOMEM; | |
912 | goto out; | |
913 | } | |
914 | ||
915 | if (copy_from_user(page, buf, count)) | |
916 | goto out; | |
917 | ||
918 | length = -EINVAL; | |
919 | if (sscanf(page, "%d", &new_value) != 1) | |
920 | goto out; | |
921 | ||
20c19e41 | 922 | if (new_value && bool_pending_values) { |
1da177e4 LT |
923 | security_set_bools(bool_num, bool_pending_values); |
924 | } | |
925 | ||
926 | length = count; | |
927 | ||
928 | out: | |
bb003079 | 929 | mutex_unlock(&sel_mutex); |
1da177e4 LT |
930 | if (page) |
931 | free_page((unsigned long) page); | |
932 | return length; | |
933 | } | |
934 | ||
9c2e08c5 | 935 | static const struct file_operations sel_commit_bools_ops = { |
1da177e4 LT |
936 | .write = sel_commit_bools_write, |
937 | }; | |
938 | ||
939 | /* delete booleans - partial revoke() from | |
940 | * fs/proc/generic.c proc_kill_inodes */ | |
941 | static void sel_remove_bools(struct dentry *de) | |
942 | { | |
943 | struct list_head *p, *node; | |
944 | struct super_block *sb = de->d_sb; | |
945 | ||
946 | spin_lock(&dcache_lock); | |
947 | node = de->d_subdirs.next; | |
948 | while (node != &de->d_subdirs) { | |
5160ee6f | 949 | struct dentry *d = list_entry(node, struct dentry, d_u.d_child); |
1da177e4 LT |
950 | list_del_init(node); |
951 | ||
952 | if (d->d_inode) { | |
953 | d = dget_locked(d); | |
954 | spin_unlock(&dcache_lock); | |
955 | d_delete(d); | |
956 | simple_unlink(de->d_inode, d); | |
957 | dput(d); | |
958 | spin_lock(&dcache_lock); | |
959 | } | |
960 | node = de->d_subdirs.next; | |
961 | } | |
962 | ||
963 | spin_unlock(&dcache_lock); | |
964 | ||
965 | file_list_lock(); | |
966 | list_for_each(p, &sb->s_files) { | |
2f512016 | 967 | struct file * filp = list_entry(p, struct file, f_u.fu_list); |
3d5ff529 | 968 | struct dentry * dentry = filp->f_path.dentry; |
1da177e4 LT |
969 | |
970 | if (dentry->d_parent != de) { | |
971 | continue; | |
972 | } | |
973 | filp->f_op = NULL; | |
974 | } | |
975 | file_list_unlock(); | |
976 | } | |
977 | ||
978 | #define BOOL_DIR_NAME "booleans" | |
979 | ||
980 | static int sel_make_bools(void) | |
981 | { | |
982 | int i, ret = 0; | |
983 | ssize_t len; | |
984 | struct dentry *dentry = NULL; | |
985 | struct dentry *dir = bool_dir; | |
986 | struct inode *inode = NULL; | |
987 | struct inode_security_struct *isec; | |
988 | char **names = NULL, *page; | |
989 | int num; | |
990 | int *values = NULL; | |
991 | u32 sid; | |
992 | ||
993 | /* remove any existing files */ | |
9a5f04bf | 994 | kfree(bool_pending_values); |
20c19e41 | 995 | bool_pending_values = NULL; |
1da177e4 LT |
996 | |
997 | sel_remove_bools(dir); | |
998 | ||
999 | if (!(page = (char*)get_zeroed_page(GFP_KERNEL))) | |
1000 | return -ENOMEM; | |
1001 | ||
1002 | ret = security_get_bools(&num, &names, &values); | |
1003 | if (ret != 0) | |
1004 | goto out; | |
1005 | ||
1006 | for (i = 0; i < num; i++) { | |
1007 | dentry = d_alloc_name(dir, names[i]); | |
1008 | if (!dentry) { | |
1009 | ret = -ENOMEM; | |
1010 | goto err; | |
1011 | } | |
1012 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); | |
1013 | if (!inode) { | |
1014 | ret = -ENOMEM; | |
1015 | goto err; | |
1016 | } | |
1017 | ||
1018 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); | |
1019 | if (len < 0) { | |
1020 | ret = -EINVAL; | |
1021 | goto err; | |
1022 | } else if (len >= PAGE_SIZE) { | |
1023 | ret = -ENAMETOOLONG; | |
1024 | goto err; | |
1025 | } | |
1026 | isec = (struct inode_security_struct*)inode->i_security; | |
1027 | if ((ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid))) | |
1028 | goto err; | |
1029 | isec->sid = sid; | |
1030 | isec->initialized = 1; | |
1031 | inode->i_fop = &sel_bool_ops; | |
1032 | inode->i_ino = i + BOOL_INO_OFFSET; | |
1033 | d_add(dentry, inode); | |
1034 | } | |
1035 | bool_num = num; | |
1036 | bool_pending_values = values; | |
1037 | out: | |
1038 | free_page((unsigned long)page); | |
1039 | if (names) { | |
9a5f04bf JJ |
1040 | for (i = 0; i < num; i++) |
1041 | kfree(names[i]); | |
1da177e4 LT |
1042 | kfree(names); |
1043 | } | |
1044 | return ret; | |
1045 | err: | |
20c19e41 | 1046 | kfree(values); |
253a8b1d | 1047 | sel_remove_bools(dir); |
1da177e4 LT |
1048 | ret = -ENOMEM; |
1049 | goto out; | |
1050 | } | |
1051 | ||
1052 | #define NULL_FILE_NAME "null" | |
1053 | ||
1054 | struct dentry *selinux_null = NULL; | |
1055 | ||
1056 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, | |
1057 | size_t count, loff_t *ppos) | |
1058 | { | |
1059 | char tmpbuf[TMPBUFLEN]; | |
1060 | ssize_t length; | |
1061 | ||
1062 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", avc_cache_threshold); | |
1063 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1064 | } | |
1065 | ||
1066 | static ssize_t sel_write_avc_cache_threshold(struct file * file, | |
1067 | const char __user * buf, | |
1068 | size_t count, loff_t *ppos) | |
1069 | ||
1070 | { | |
1071 | char *page; | |
1072 | ssize_t ret; | |
1073 | int new_value; | |
1074 | ||
bfd51626 | 1075 | if (count >= PAGE_SIZE) { |
1da177e4 LT |
1076 | ret = -ENOMEM; |
1077 | goto out; | |
1078 | } | |
1079 | ||
1080 | if (*ppos != 0) { | |
1081 | /* No partial writes. */ | |
1082 | ret = -EINVAL; | |
1083 | goto out; | |
1084 | } | |
1085 | ||
1086 | page = (char*)get_zeroed_page(GFP_KERNEL); | |
1087 | if (!page) { | |
1088 | ret = -ENOMEM; | |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | if (copy_from_user(page, buf, count)) { | |
1093 | ret = -EFAULT; | |
1094 | goto out_free; | |
1095 | } | |
1096 | ||
1097 | if (sscanf(page, "%u", &new_value) != 1) { | |
1098 | ret = -EINVAL; | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | if (new_value != avc_cache_threshold) { | |
1103 | ret = task_has_security(current, SECURITY__SETSECPARAM); | |
1104 | if (ret) | |
1105 | goto out_free; | |
1106 | avc_cache_threshold = new_value; | |
1107 | } | |
1108 | ret = count; | |
1109 | out_free: | |
1110 | free_page((unsigned long)page); | |
1111 | out: | |
1112 | return ret; | |
1113 | } | |
1114 | ||
1115 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1116 | size_t count, loff_t *ppos) | |
1117 | { | |
1118 | char *page; | |
1119 | ssize_t ret = 0; | |
1120 | ||
1121 | page = (char *)__get_free_page(GFP_KERNEL); | |
1122 | if (!page) { | |
1123 | ret = -ENOMEM; | |
1124 | goto out; | |
1125 | } | |
1126 | ret = avc_get_hash_stats(page); | |
1127 | if (ret >= 0) | |
1128 | ret = simple_read_from_buffer(buf, count, ppos, page, ret); | |
1129 | free_page((unsigned long)page); | |
1130 | out: | |
1131 | return ret; | |
1132 | } | |
1133 | ||
9c2e08c5 | 1134 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1135 | .read = sel_read_avc_cache_threshold, |
1136 | .write = sel_write_avc_cache_threshold, | |
1137 | }; | |
1138 | ||
9c2e08c5 | 1139 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 LT |
1140 | .read = sel_read_avc_hash_stats, |
1141 | }; | |
1142 | ||
1143 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1144 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1145 | { | |
1146 | int cpu; | |
1147 | ||
1148 | for (cpu = *idx; cpu < NR_CPUS; ++cpu) { | |
1149 | if (!cpu_possible(cpu)) | |
1150 | continue; | |
1151 | *idx = cpu + 1; | |
1152 | return &per_cpu(avc_cache_stats, cpu); | |
1153 | } | |
1154 | return NULL; | |
1155 | } | |
1156 | ||
1157 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1158 | { | |
1159 | loff_t n = *pos - 1; | |
1160 | ||
1161 | if (*pos == 0) | |
1162 | return SEQ_START_TOKEN; | |
1163 | ||
1164 | return sel_avc_get_stat_idx(&n); | |
1165 | } | |
1166 | ||
1167 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1168 | { | |
1169 | return sel_avc_get_stat_idx(pos); | |
1170 | } | |
1171 | ||
1172 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1173 | { | |
1174 | struct avc_cache_stats *st = v; | |
1175 | ||
1176 | if (v == SEQ_START_TOKEN) | |
1177 | seq_printf(seq, "lookups hits misses allocations reclaims " | |
1178 | "frees\n"); | |
1179 | else | |
1180 | seq_printf(seq, "%u %u %u %u %u %u\n", st->lookups, | |
1181 | st->hits, st->misses, st->allocations, | |
1182 | st->reclaims, st->frees); | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1187 | { } | |
1188 | ||
1189 | static struct seq_operations sel_avc_cache_stats_seq_ops = { | |
1190 | .start = sel_avc_stats_seq_start, | |
1191 | .next = sel_avc_stats_seq_next, | |
1192 | .show = sel_avc_stats_seq_show, | |
1193 | .stop = sel_avc_stats_seq_stop, | |
1194 | }; | |
1195 | ||
1196 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1197 | { | |
1198 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1199 | } | |
1200 | ||
9c2e08c5 | 1201 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1202 | .open = sel_open_avc_cache_stats, |
1203 | .read = seq_read, | |
1204 | .llseek = seq_lseek, | |
1205 | .release = seq_release, | |
1206 | }; | |
1207 | #endif | |
1208 | ||
1209 | static int sel_make_avc_files(struct dentry *dir) | |
1210 | { | |
1211 | int i, ret = 0; | |
1212 | static struct tree_descr files[] = { | |
1213 | { "cache_threshold", | |
1214 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1215 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1216 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1217 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1218 | #endif | |
1219 | }; | |
1220 | ||
6e20a64a | 1221 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1222 | struct inode *inode; |
1223 | struct dentry *dentry; | |
1224 | ||
1225 | dentry = d_alloc_name(dir, files[i].name); | |
1226 | if (!dentry) { | |
1227 | ret = -ENOMEM; | |
d6aafa65 | 1228 | goto out; |
1da177e4 LT |
1229 | } |
1230 | ||
1231 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
1232 | if (!inode) { | |
1233 | ret = -ENOMEM; | |
d6aafa65 | 1234 | goto out; |
1da177e4 LT |
1235 | } |
1236 | inode->i_fop = files[i].ops; | |
1237 | d_add(dentry, inode); | |
1238 | } | |
1239 | out: | |
1240 | return ret; | |
1da177e4 LT |
1241 | } |
1242 | ||
edb20fb5 | 1243 | static int sel_make_dir(struct inode *dir, struct dentry *dentry) |
1da177e4 LT |
1244 | { |
1245 | int ret = 0; | |
1246 | struct inode *inode; | |
1247 | ||
edb20fb5 | 1248 | inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO); |
1da177e4 LT |
1249 | if (!inode) { |
1250 | ret = -ENOMEM; | |
1251 | goto out; | |
1252 | } | |
1253 | inode->i_op = &simple_dir_inode_operations; | |
1254 | inode->i_fop = &simple_dir_operations; | |
40e906f8 | 1255 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1256 | inc_nlink(inode); |
1da177e4 | 1257 | d_add(dentry, inode); |
edb20fb5 | 1258 | /* bump link count on parent directory, too */ |
d8c76e6f | 1259 | inc_nlink(dir); |
1da177e4 LT |
1260 | out: |
1261 | return ret; | |
1262 | } | |
1263 | ||
1264 | static int sel_fill_super(struct super_block * sb, void * data, int silent) | |
1265 | { | |
1266 | int ret; | |
1267 | struct dentry *dentry; | |
edb20fb5 | 1268 | struct inode *inode, *root_inode; |
1da177e4 LT |
1269 | struct inode_security_struct *isec; |
1270 | ||
1271 | static struct tree_descr selinux_files[] = { | |
1272 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, | |
1273 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1274 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1275 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1276 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1277 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1278 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1279 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1280 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1281 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1282 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1283 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1284 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
4e5ab4cb | 1285 | [SEL_COMPAT_NET] = {"compat_net", &sel_compat_net_ops, S_IRUGO|S_IWUSR}, |
1da177e4 LT |
1286 | /* last one */ {""} |
1287 | }; | |
1288 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); | |
1289 | if (ret) | |
161ce45a | 1290 | goto err; |
1da177e4 | 1291 | |
edb20fb5 JM |
1292 | root_inode = sb->s_root->d_inode; |
1293 | ||
1da177e4 | 1294 | dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME); |
161ce45a JM |
1295 | if (!dentry) { |
1296 | ret = -ENOMEM; | |
1297 | goto err; | |
1298 | } | |
1da177e4 | 1299 | |
edb20fb5 | 1300 | ret = sel_make_dir(root_inode, dentry); |
cde174a8 | 1301 | if (ret) |
161ce45a | 1302 | goto err; |
cde174a8 | 1303 | |
1da177e4 | 1304 | bool_dir = dentry; |
1da177e4 LT |
1305 | |
1306 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); | |
161ce45a JM |
1307 | if (!dentry) { |
1308 | ret = -ENOMEM; | |
1309 | goto err; | |
1310 | } | |
1da177e4 LT |
1311 | |
1312 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); | |
161ce45a JM |
1313 | if (!inode) { |
1314 | ret = -ENOMEM; | |
1315 | goto err; | |
1316 | } | |
1da177e4 LT |
1317 | isec = (struct inode_security_struct*)inode->i_security; |
1318 | isec->sid = SECINITSID_DEVNULL; | |
1319 | isec->sclass = SECCLASS_CHR_FILE; | |
1320 | isec->initialized = 1; | |
1321 | ||
1322 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1323 | d_add(dentry, inode); | |
1324 | selinux_null = dentry; | |
1325 | ||
1326 | dentry = d_alloc_name(sb->s_root, "avc"); | |
161ce45a JM |
1327 | if (!dentry) { |
1328 | ret = -ENOMEM; | |
1329 | goto err; | |
1330 | } | |
1da177e4 | 1331 | |
edb20fb5 | 1332 | ret = sel_make_dir(root_inode, dentry); |
1da177e4 | 1333 | if (ret) |
161ce45a | 1334 | goto err; |
1da177e4 LT |
1335 | |
1336 | ret = sel_make_avc_files(dentry); | |
1337 | if (ret) | |
161ce45a | 1338 | goto err; |
1da177e4 | 1339 | out: |
161ce45a JM |
1340 | return ret; |
1341 | err: | |
1da177e4 | 1342 | printk(KERN_ERR "%s: failed while creating inodes\n", __FUNCTION__); |
161ce45a | 1343 | goto out; |
1da177e4 LT |
1344 | } |
1345 | ||
454e2398 DH |
1346 | static int sel_get_sb(struct file_system_type *fs_type, |
1347 | int flags, const char *dev_name, void *data, | |
1348 | struct vfsmount *mnt) | |
1da177e4 | 1349 | { |
454e2398 | 1350 | return get_sb_single(fs_type, flags, data, sel_fill_super, mnt); |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | static struct file_system_type sel_fs_type = { | |
1354 | .name = "selinuxfs", | |
1355 | .get_sb = sel_get_sb, | |
1356 | .kill_sb = kill_litter_super, | |
1357 | }; | |
1358 | ||
1359 | struct vfsmount *selinuxfs_mount; | |
1360 | ||
1361 | static int __init init_sel_fs(void) | |
1362 | { | |
1363 | int err; | |
1364 | ||
1365 | if (!selinux_enabled) | |
1366 | return 0; | |
1367 | err = register_filesystem(&sel_fs_type); | |
1368 | if (!err) { | |
1369 | selinuxfs_mount = kern_mount(&sel_fs_type); | |
1370 | if (IS_ERR(selinuxfs_mount)) { | |
1371 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
1372 | err = PTR_ERR(selinuxfs_mount); | |
1373 | selinuxfs_mount = NULL; | |
1374 | } | |
1375 | } | |
1376 | return err; | |
1377 | } | |
1378 | ||
1379 | __initcall(init_sel_fs); | |
1380 | ||
1381 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
1382 | void exit_sel_fs(void) | |
1383 | { | |
1384 | unregister_filesystem(&sel_fs_type); | |
1385 | } | |
1386 | #endif |