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