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Commit | Line | Data |
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1da177e4 LT |
1 | /* Updated: Karl MacMillan <kmacmillan@tresys.com> |
2 | * | |
1872981b | 3 | * Added conditional policy language extensions |
1da177e4 | 4 | * |
82c21bfa | 5 | * Updated: Hewlett-Packard <paul@paul-moore.com> |
3bb56b25 | 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> | |
0619f0f5 | 22 | #include <linux/mount.h> |
bb003079 | 23 | #include <linux/mutex.h> |
1da177e4 LT |
24 | #include <linux/init.h> |
25 | #include <linux/string.h> | |
26 | #include <linux/security.h> | |
27 | #include <linux/major.h> | |
28 | #include <linux/seq_file.h> | |
29 | #include <linux/percpu.h> | |
af601e46 | 30 | #include <linux/audit.h> |
f5269710 | 31 | #include <linux/uaccess.h> |
7a627e3b | 32 | #include <linux/kobject.h> |
0f7e4c33 | 33 | #include <linux/ctype.h> |
1da177e4 LT |
34 | |
35 | /* selinuxfs pseudo filesystem for exporting the security policy API. | |
36 | Based on the proc code and the fs/nfsd/nfsctl.c code. */ | |
37 | ||
38 | #include "flask.h" | |
39 | #include "avc.h" | |
40 | #include "avc_ss.h" | |
41 | #include "security.h" | |
42 | #include "objsec.h" | |
43 | #include "conditional.h" | |
44 | ||
1da177e4 LT |
45 | enum sel_inos { |
46 | SEL_ROOT_INO = 2, | |
47 | SEL_LOAD, /* load policy */ | |
48 | SEL_ENFORCE, /* get or set enforcing status */ | |
49 | SEL_CONTEXT, /* validate context */ | |
50 | SEL_ACCESS, /* compute access decision */ | |
51 | SEL_CREATE, /* compute create labeling decision */ | |
52 | SEL_RELABEL, /* compute relabeling decision */ | |
53 | SEL_USER, /* compute reachable user contexts */ | |
54 | SEL_POLICYVERS, /* return policy version for this kernel */ | |
55 | SEL_COMMIT_BOOLS, /* commit new boolean values */ | |
56 | SEL_MLS, /* return if MLS policy is enabled */ | |
57 | SEL_DISABLE, /* disable SELinux until next reboot */ | |
1da177e4 LT |
58 | SEL_MEMBER, /* compute polyinstantiation membership decision */ |
59 | SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ | |
4e5ab4cb | 60 | SEL_COMPAT_NET, /* whether to use old compat network packet controls */ |
3f12070e EP |
61 | SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ |
62 | SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ | |
11904167 | 63 | SEL_STATUS, /* export current status using mmap() */ |
cee74f47 | 64 | SEL_POLICY, /* allow userspace to read the in kernel policy */ |
f9df6458 | 65 | SEL_VALIDATE_TRANS, /* compute validatetrans decision */ |
6174eafc | 66 | SEL_INO_NEXT, /* The next inode number to use */ |
1da177e4 LT |
67 | }; |
68 | ||
0619f0f5 SS |
69 | struct selinux_fs_info { |
70 | struct dentry *bool_dir; | |
71 | unsigned int bool_num; | |
72 | char **bool_pending_names; | |
73 | unsigned int *bool_pending_values; | |
74 | struct dentry *class_dir; | |
75 | unsigned long last_class_ino; | |
76 | bool policy_opened; | |
77 | struct dentry *policycap_dir; | |
78 | struct mutex mutex; | |
79 | unsigned long last_ino; | |
80 | struct selinux_state *state; | |
81 | struct super_block *sb; | |
82 | }; | |
83 | ||
84 | static int selinux_fs_info_create(struct super_block *sb) | |
85 | { | |
86 | struct selinux_fs_info *fsi; | |
87 | ||
88 | fsi = kzalloc(sizeof(*fsi), GFP_KERNEL); | |
89 | if (!fsi) | |
90 | return -ENOMEM; | |
91 | ||
92 | mutex_init(&fsi->mutex); | |
93 | fsi->last_ino = SEL_INO_NEXT - 1; | |
94 | fsi->state = &selinux_state; | |
95 | fsi->sb = sb; | |
96 | sb->s_fs_info = fsi; | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static void selinux_fs_info_free(struct super_block *sb) | |
101 | { | |
102 | struct selinux_fs_info *fsi = sb->s_fs_info; | |
103 | int i; | |
104 | ||
105 | if (fsi) { | |
106 | for (i = 0; i < fsi->bool_num; i++) | |
107 | kfree(fsi->bool_pending_names[i]); | |
108 | kfree(fsi->bool_pending_names); | |
109 | kfree(fsi->bool_pending_values); | |
110 | } | |
111 | kfree(sb->s_fs_info); | |
112 | sb->s_fs_info = NULL; | |
113 | } | |
6174eafc | 114 | |
3bb56b25 PM |
115 | #define SEL_INITCON_INO_OFFSET 0x01000000 |
116 | #define SEL_BOOL_INO_OFFSET 0x02000000 | |
117 | #define SEL_CLASS_INO_OFFSET 0x04000000 | |
118 | #define SEL_POLICYCAP_INO_OFFSET 0x08000000 | |
119 | #define SEL_INO_MASK 0x00ffffff | |
f0ee2e46 | 120 | |
1da177e4 LT |
121 | #define TMPBUFLEN 12 |
122 | static ssize_t sel_read_enforce(struct file *filp, char __user *buf, | |
123 | size_t count, loff_t *ppos) | |
124 | { | |
0619f0f5 | 125 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1da177e4 LT |
126 | char tmpbuf[TMPBUFLEN]; |
127 | ssize_t length; | |
128 | ||
aa8e712c | 129 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", |
0619f0f5 | 130 | enforcing_enabled(fsi->state)); |
1da177e4 LT |
131 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
132 | } | |
133 | ||
134 | #ifdef CONFIG_SECURITY_SELINUX_DEVELOP | |
1872981b | 135 | static ssize_t sel_write_enforce(struct file *file, const char __user *buf, |
1da177e4 LT |
136 | size_t count, loff_t *ppos) |
137 | ||
138 | { | |
0619f0f5 SS |
139 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
140 | struct selinux_state *state = fsi->state; | |
b77a493b | 141 | char *page = NULL; |
1da177e4 | 142 | ssize_t length; |
aa8e712c | 143 | int old_value, new_value; |
1da177e4 | 144 | |
bfd51626 | 145 | if (count >= PAGE_SIZE) |
8365a719 | 146 | return -ENOMEM; |
b77a493b EP |
147 | |
148 | /* No partial writes. */ | |
b77a493b | 149 | if (*ppos != 0) |
8365a719 | 150 | return -EINVAL; |
b77a493b | 151 | |
8365a719 AV |
152 | page = memdup_user_nul(buf, count); |
153 | if (IS_ERR(page)) | |
154 | return PTR_ERR(page); | |
1da177e4 LT |
155 | |
156 | length = -EINVAL; | |
157 | if (sscanf(page, "%d", &new_value) != 1) | |
158 | goto out; | |
159 | ||
ea49d10e SS |
160 | new_value = !!new_value; |
161 | ||
0619f0f5 | 162 | old_value = enforcing_enabled(state); |
aa8e712c | 163 | if (new_value != old_value) { |
6b6bc620 SS |
164 | length = avc_has_perm(&selinux_state, |
165 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
166 | SECCLASS_SECURITY, SECURITY__SETENFORCE, |
167 | NULL); | |
1da177e4 LT |
168 | if (length) |
169 | goto out; | |
cdfb6b34 | 170 | audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, |
4195ed42 RGB |
171 | "enforcing=%d old_enforcing=%d auid=%u ses=%u" |
172 | " enabled=%d old-enabled=%d lsm=selinux res=1", | |
aa8e712c | 173 | new_value, old_value, |
581abc09 | 174 | from_kuid(&init_user_ns, audit_get_loginuid(current)), |
4195ed42 RGB |
175 | audit_get_sessionid(current), |
176 | selinux_enabled, selinux_enabled); | |
0619f0f5 | 177 | enforcing_set(state, new_value); |
aa8e712c | 178 | if (new_value) |
6b6bc620 | 179 | avc_ss_reset(state->avc, 0); |
aa8e712c | 180 | selnl_notify_setenforce(new_value); |
0619f0f5 | 181 | selinux_status_update_setenforce(state, new_value); |
aa8e712c | 182 | if (!new_value) |
8f408ab6 | 183 | call_lsm_notifier(LSM_POLICY_CHANGE, NULL); |
1da177e4 LT |
184 | } |
185 | length = count; | |
186 | out: | |
8365a719 | 187 | kfree(page); |
1da177e4 LT |
188 | return length; |
189 | } | |
190 | #else | |
191 | #define sel_write_enforce NULL | |
192 | #endif | |
193 | ||
9c2e08c5 | 194 | static const struct file_operations sel_enforce_ops = { |
1da177e4 LT |
195 | .read = sel_read_enforce, |
196 | .write = sel_write_enforce, | |
57a62c23 | 197 | .llseek = generic_file_llseek, |
1da177e4 LT |
198 | }; |
199 | ||
3f12070e EP |
200 | static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, |
201 | size_t count, loff_t *ppos) | |
202 | { | |
0619f0f5 SS |
203 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
204 | struct selinux_state *state = fsi->state; | |
3f12070e EP |
205 | char tmpbuf[TMPBUFLEN]; |
206 | ssize_t length; | |
496ad9aa | 207 | ino_t ino = file_inode(filp)->i_ino; |
3f12070e | 208 | int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? |
0619f0f5 SS |
209 | security_get_reject_unknown(state) : |
210 | !security_get_allow_unknown(state); | |
3f12070e EP |
211 | |
212 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); | |
213 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
214 | } | |
215 | ||
216 | static const struct file_operations sel_handle_unknown_ops = { | |
217 | .read = sel_read_handle_unknown, | |
57a62c23 | 218 | .llseek = generic_file_llseek, |
3f12070e EP |
219 | }; |
220 | ||
11904167 KK |
221 | static int sel_open_handle_status(struct inode *inode, struct file *filp) |
222 | { | |
0619f0f5 SS |
223 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
224 | struct page *status = selinux_kernel_status_page(fsi->state); | |
11904167 KK |
225 | |
226 | if (!status) | |
227 | return -ENOMEM; | |
228 | ||
229 | filp->private_data = status; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, | |
235 | size_t count, loff_t *ppos) | |
236 | { | |
237 | struct page *status = filp->private_data; | |
238 | ||
239 | BUG_ON(!status); | |
240 | ||
241 | return simple_read_from_buffer(buf, count, ppos, | |
242 | page_address(status), | |
243 | sizeof(struct selinux_kernel_status)); | |
244 | } | |
245 | ||
246 | static int sel_mmap_handle_status(struct file *filp, | |
247 | struct vm_area_struct *vma) | |
248 | { | |
249 | struct page *status = filp->private_data; | |
250 | unsigned long size = vma->vm_end - vma->vm_start; | |
251 | ||
252 | BUG_ON(!status); | |
253 | ||
254 | /* only allows one page from the head */ | |
255 | if (vma->vm_pgoff > 0 || size != PAGE_SIZE) | |
256 | return -EIO; | |
257 | /* disallow writable mapping */ | |
258 | if (vma->vm_flags & VM_WRITE) | |
259 | return -EPERM; | |
260 | /* disallow mprotect() turns it into writable */ | |
261 | vma->vm_flags &= ~VM_MAYWRITE; | |
262 | ||
263 | return remap_pfn_range(vma, vma->vm_start, | |
264 | page_to_pfn(status), | |
265 | size, vma->vm_page_prot); | |
266 | } | |
267 | ||
268 | static const struct file_operations sel_handle_status_ops = { | |
269 | .open = sel_open_handle_status, | |
270 | .read = sel_read_handle_status, | |
271 | .mmap = sel_mmap_handle_status, | |
272 | .llseek = generic_file_llseek, | |
273 | }; | |
274 | ||
1da177e4 | 275 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE |
1872981b | 276 | static ssize_t sel_write_disable(struct file *file, const char __user *buf, |
1da177e4 LT |
277 | size_t count, loff_t *ppos) |
278 | ||
279 | { | |
0619f0f5 | 280 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
8365a719 | 281 | char *page; |
1da177e4 LT |
282 | ssize_t length; |
283 | int new_value; | |
4195ed42 | 284 | int enforcing; |
1da177e4 | 285 | |
bfd51626 | 286 | if (count >= PAGE_SIZE) |
8365a719 | 287 | return -ENOMEM; |
b77a493b EP |
288 | |
289 | /* No partial writes. */ | |
b77a493b | 290 | if (*ppos != 0) |
8365a719 | 291 | return -EINVAL; |
b77a493b | 292 | |
8365a719 AV |
293 | page = memdup_user_nul(buf, count); |
294 | if (IS_ERR(page)) | |
295 | return PTR_ERR(page); | |
1da177e4 LT |
296 | |
297 | length = -EINVAL; | |
298 | if (sscanf(page, "%d", &new_value) != 1) | |
299 | goto out; | |
300 | ||
301 | if (new_value) { | |
4195ed42 | 302 | enforcing = enforcing_enabled(fsi->state); |
0619f0f5 | 303 | length = selinux_disable(fsi->state); |
b77a493b | 304 | if (length) |
1da177e4 | 305 | goto out; |
cdfb6b34 | 306 | audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, |
4195ed42 RGB |
307 | "enforcing=%d old_enforcing=%d auid=%u ses=%u" |
308 | " enabled=%d old-enabled=%d lsm=selinux res=1", | |
309 | enforcing, enforcing, | |
581abc09 | 310 | from_kuid(&init_user_ns, audit_get_loginuid(current)), |
4195ed42 | 311 | audit_get_sessionid(current), 0, 1); |
1da177e4 LT |
312 | } |
313 | ||
314 | length = count; | |
315 | out: | |
8365a719 | 316 | kfree(page); |
1da177e4 LT |
317 | return length; |
318 | } | |
319 | #else | |
320 | #define sel_write_disable NULL | |
321 | #endif | |
322 | ||
9c2e08c5 | 323 | static const struct file_operations sel_disable_ops = { |
1da177e4 | 324 | .write = sel_write_disable, |
57a62c23 | 325 | .llseek = generic_file_llseek, |
1da177e4 LT |
326 | }; |
327 | ||
328 | static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, | |
1872981b | 329 | size_t count, loff_t *ppos) |
1da177e4 LT |
330 | { |
331 | char tmpbuf[TMPBUFLEN]; | |
332 | ssize_t length; | |
333 | ||
334 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); | |
335 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
336 | } | |
337 | ||
9c2e08c5 | 338 | static const struct file_operations sel_policyvers_ops = { |
1da177e4 | 339 | .read = sel_read_policyvers, |
57a62c23 | 340 | .llseek = generic_file_llseek, |
1da177e4 LT |
341 | }; |
342 | ||
343 | /* declaration for sel_write_load */ | |
0619f0f5 SS |
344 | static int sel_make_bools(struct selinux_fs_info *fsi); |
345 | static int sel_make_classes(struct selinux_fs_info *fsi); | |
346 | static int sel_make_policycap(struct selinux_fs_info *fsi); | |
e47c8fc5 CP |
347 | |
348 | /* declaration for sel_make_class_dirs */ | |
a1c2aa1e | 349 | static struct dentry *sel_make_dir(struct dentry *dir, const char *name, |
e47c8fc5 | 350 | unsigned long *ino); |
1da177e4 LT |
351 | |
352 | static ssize_t sel_read_mls(struct file *filp, char __user *buf, | |
353 | size_t count, loff_t *ppos) | |
354 | { | |
0619f0f5 | 355 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1da177e4 LT |
356 | char tmpbuf[TMPBUFLEN]; |
357 | ssize_t length; | |
358 | ||
0719aaf5 | 359 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", |
0619f0f5 | 360 | security_mls_enabled(fsi->state)); |
1da177e4 LT |
361 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
362 | } | |
363 | ||
9c2e08c5 | 364 | static const struct file_operations sel_mls_ops = { |
1da177e4 | 365 | .read = sel_read_mls, |
57a62c23 | 366 | .llseek = generic_file_llseek, |
1da177e4 LT |
367 | }; |
368 | ||
cee74f47 EP |
369 | struct policy_load_memory { |
370 | size_t len; | |
371 | void *data; | |
372 | }; | |
373 | ||
374 | static int sel_open_policy(struct inode *inode, struct file *filp) | |
375 | { | |
0619f0f5 SS |
376 | struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; |
377 | struct selinux_state *state = fsi->state; | |
cee74f47 EP |
378 | struct policy_load_memory *plm = NULL; |
379 | int rc; | |
380 | ||
381 | BUG_ON(filp->private_data); | |
382 | ||
0619f0f5 | 383 | mutex_lock(&fsi->mutex); |
cee74f47 | 384 | |
6b6bc620 SS |
385 | rc = avc_has_perm(&selinux_state, |
386 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 387 | SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); |
cee74f47 EP |
388 | if (rc) |
389 | goto err; | |
390 | ||
391 | rc = -EBUSY; | |
0619f0f5 | 392 | if (fsi->policy_opened) |
cee74f47 EP |
393 | goto err; |
394 | ||
395 | rc = -ENOMEM; | |
396 | plm = kzalloc(sizeof(*plm), GFP_KERNEL); | |
397 | if (!plm) | |
398 | goto err; | |
399 | ||
0619f0f5 | 400 | if (i_size_read(inode) != security_policydb_len(state)) { |
5955102c | 401 | inode_lock(inode); |
0619f0f5 | 402 | i_size_write(inode, security_policydb_len(state)); |
5955102c | 403 | inode_unlock(inode); |
cee74f47 EP |
404 | } |
405 | ||
0619f0f5 | 406 | rc = security_read_policy(state, &plm->data, &plm->len); |
cee74f47 EP |
407 | if (rc) |
408 | goto err; | |
409 | ||
0619f0f5 | 410 | fsi->policy_opened = 1; |
cee74f47 EP |
411 | |
412 | filp->private_data = plm; | |
413 | ||
0619f0f5 | 414 | mutex_unlock(&fsi->mutex); |
cee74f47 EP |
415 | |
416 | return 0; | |
417 | err: | |
0619f0f5 | 418 | mutex_unlock(&fsi->mutex); |
cee74f47 EP |
419 | |
420 | if (plm) | |
421 | vfree(plm->data); | |
422 | kfree(plm); | |
423 | return rc; | |
424 | } | |
425 | ||
426 | static int sel_release_policy(struct inode *inode, struct file *filp) | |
427 | { | |
0619f0f5 | 428 | struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; |
cee74f47 EP |
429 | struct policy_load_memory *plm = filp->private_data; |
430 | ||
431 | BUG_ON(!plm); | |
432 | ||
0619f0f5 | 433 | fsi->policy_opened = 0; |
cee74f47 EP |
434 | |
435 | vfree(plm->data); | |
436 | kfree(plm); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static ssize_t sel_read_policy(struct file *filp, char __user *buf, | |
442 | size_t count, loff_t *ppos) | |
443 | { | |
0619f0f5 | 444 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
cee74f47 EP |
445 | struct policy_load_memory *plm = filp->private_data; |
446 | int ret; | |
447 | ||
0619f0f5 | 448 | mutex_lock(&fsi->mutex); |
cee74f47 | 449 | |
6b6bc620 SS |
450 | ret = avc_has_perm(&selinux_state, |
451 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 452 | SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); |
cee74f47 EP |
453 | if (ret) |
454 | goto out; | |
455 | ||
456 | ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); | |
457 | out: | |
0619f0f5 | 458 | mutex_unlock(&fsi->mutex); |
cee74f47 EP |
459 | return ret; |
460 | } | |
461 | ||
ac9a1f6d | 462 | static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf) |
845ca30f | 463 | { |
11bac800 | 464 | struct policy_load_memory *plm = vmf->vma->vm_file->private_data; |
845ca30f EP |
465 | unsigned long offset; |
466 | struct page *page; | |
467 | ||
468 | if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) | |
469 | return VM_FAULT_SIGBUS; | |
470 | ||
471 | offset = vmf->pgoff << PAGE_SHIFT; | |
472 | if (offset >= roundup(plm->len, PAGE_SIZE)) | |
473 | return VM_FAULT_SIGBUS; | |
474 | ||
475 | page = vmalloc_to_page(plm->data + offset); | |
476 | get_page(page); | |
477 | ||
478 | vmf->page = page; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
7cbea8dc | 483 | static const struct vm_operations_struct sel_mmap_policy_ops = { |
845ca30f EP |
484 | .fault = sel_mmap_policy_fault, |
485 | .page_mkwrite = sel_mmap_policy_fault, | |
486 | }; | |
487 | ||
ad3fa08c | 488 | static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) |
845ca30f EP |
489 | { |
490 | if (vma->vm_flags & VM_SHARED) { | |
491 | /* do not allow mprotect to make mapping writable */ | |
492 | vma->vm_flags &= ~VM_MAYWRITE; | |
493 | ||
494 | if (vma->vm_flags & VM_WRITE) | |
495 | return -EACCES; | |
496 | } | |
497 | ||
314e51b9 | 498 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
845ca30f EP |
499 | vma->vm_ops = &sel_mmap_policy_ops; |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
cee74f47 EP |
504 | static const struct file_operations sel_policy_ops = { |
505 | .open = sel_open_policy, | |
506 | .read = sel_read_policy, | |
845ca30f | 507 | .mmap = sel_mmap_policy, |
cee74f47 | 508 | .release = sel_release_policy, |
47a93a5b | 509 | .llseek = generic_file_llseek, |
cee74f47 EP |
510 | }; |
511 | ||
0619f0f5 SS |
512 | static int sel_make_policy_nodes(struct selinux_fs_info *fsi) |
513 | { | |
514 | int ret; | |
515 | ||
516 | ret = sel_make_bools(fsi); | |
517 | if (ret) { | |
518 | pr_err("SELinux: failed to load policy booleans\n"); | |
519 | return ret; | |
520 | } | |
521 | ||
522 | ret = sel_make_classes(fsi); | |
523 | if (ret) { | |
524 | pr_err("SELinux: failed to load policy classes\n"); | |
525 | return ret; | |
526 | } | |
527 | ||
528 | ret = sel_make_policycap(fsi); | |
529 | if (ret) { | |
530 | pr_err("SELinux: failed to load policy capabilities\n"); | |
531 | return ret; | |
532 | } | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
1872981b | 537 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
538 | size_t count, loff_t *ppos) |
539 | ||
540 | { | |
0619f0f5 | 541 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1da177e4 LT |
542 | ssize_t length; |
543 | void *data = NULL; | |
544 | ||
0619f0f5 | 545 | mutex_lock(&fsi->mutex); |
1da177e4 | 546 | |
6b6bc620 SS |
547 | length = avc_has_perm(&selinux_state, |
548 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 549 | SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); |
1da177e4 LT |
550 | if (length) |
551 | goto out; | |
552 | ||
b77a493b EP |
553 | /* No partial writes. */ |
554 | length = -EINVAL; | |
555 | if (*ppos != 0) | |
1da177e4 | 556 | goto out; |
1da177e4 | 557 | |
b77a493b EP |
558 | length = -EFBIG; |
559 | if (count > 64 * 1024 * 1024) | |
560 | goto out; | |
561 | ||
562 | length = -ENOMEM; | |
563 | data = vmalloc(count); | |
564 | if (!data) | |
1da177e4 | 565 | goto out; |
1da177e4 LT |
566 | |
567 | length = -EFAULT; | |
568 | if (copy_from_user(data, buf, count) != 0) | |
569 | goto out; | |
570 | ||
0619f0f5 | 571 | length = security_load_policy(fsi->state, data, count); |
4262fb51 GT |
572 | if (length) { |
573 | pr_warn_ratelimited("SELinux: failed to load policy\n"); | |
1da177e4 | 574 | goto out; |
4262fb51 | 575 | } |
1da177e4 | 576 | |
0619f0f5 SS |
577 | length = sel_make_policy_nodes(fsi); |
578 | if (length) | |
b77a493b EP |
579 | goto out1; |
580 | ||
581 | length = count; | |
e47c8fc5 CP |
582 | |
583 | out1: | |
cdfb6b34 | 584 | audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
d141136f | 585 | "auid=%u ses=%u lsm=selinux res=1", |
581abc09 | 586 | from_kuid(&init_user_ns, audit_get_loginuid(current)), |
4746ec5b | 587 | audit_get_sessionid(current)); |
1da177e4 | 588 | out: |
0619f0f5 | 589 | mutex_unlock(&fsi->mutex); |
1da177e4 LT |
590 | vfree(data); |
591 | return length; | |
592 | } | |
593 | ||
9c2e08c5 | 594 | static const struct file_operations sel_load_ops = { |
1da177e4 | 595 | .write = sel_write_load, |
57a62c23 | 596 | .llseek = generic_file_llseek, |
1da177e4 LT |
597 | }; |
598 | ||
1872981b | 599 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 600 | { |
0619f0f5 SS |
601 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
602 | struct selinux_state *state = fsi->state; | |
b77a493b | 603 | char *canon = NULL; |
ce9982d0 | 604 | u32 sid, len; |
1da177e4 LT |
605 | ssize_t length; |
606 | ||
6b6bc620 SS |
607 | length = avc_has_perm(&selinux_state, |
608 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 609 | SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); |
1da177e4 | 610 | if (length) |
b77a493b | 611 | goto out; |
1da177e4 | 612 | |
0619f0f5 | 613 | length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); |
b77a493b EP |
614 | if (length) |
615 | goto out; | |
1da177e4 | 616 | |
0619f0f5 | 617 | length = security_sid_to_context(state, sid, &canon, &len); |
b77a493b EP |
618 | if (length) |
619 | goto out; | |
ce9982d0 | 620 | |
b77a493b | 621 | length = -ERANGE; |
ce9982d0 | 622 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
744ba35e EP |
623 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
624 | "payload max\n", __func__, len); | |
1da177e4 | 625 | goto out; |
ce9982d0 | 626 | } |
1da177e4 | 627 | |
ce9982d0 SS |
628 | memcpy(buf, canon, len); |
629 | length = len; | |
1da177e4 | 630 | out: |
ce9982d0 | 631 | kfree(canon); |
1da177e4 LT |
632 | return length; |
633 | } | |
634 | ||
1da177e4 LT |
635 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
636 | size_t count, loff_t *ppos) | |
637 | { | |
0619f0f5 | 638 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1da177e4 LT |
639 | char tmpbuf[TMPBUFLEN]; |
640 | ssize_t length; | |
641 | ||
0619f0f5 | 642 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); |
1da177e4 LT |
643 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
644 | } | |
645 | ||
1872981b | 646 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
647 | size_t count, loff_t *ppos) |
648 | { | |
0619f0f5 | 649 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
8365a719 | 650 | char *page; |
1da177e4 LT |
651 | ssize_t length; |
652 | unsigned int new_value; | |
653 | ||
6b6bc620 SS |
654 | length = avc_has_perm(&selinux_state, |
655 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
656 | SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, |
657 | NULL); | |
1da177e4 | 658 | if (length) |
8365a719 | 659 | return length; |
1da177e4 | 660 | |
bfd51626 | 661 | if (count >= PAGE_SIZE) |
8365a719 | 662 | return -ENOMEM; |
b77a493b EP |
663 | |
664 | /* No partial writes. */ | |
b77a493b | 665 | if (*ppos != 0) |
8365a719 | 666 | return -EINVAL; |
b77a493b | 667 | |
8365a719 AV |
668 | page = memdup_user_nul(buf, count); |
669 | if (IS_ERR(page)) | |
670 | return PTR_ERR(page); | |
1da177e4 LT |
671 | |
672 | length = -EINVAL; | |
673 | if (sscanf(page, "%u", &new_value) != 1) | |
674 | goto out; | |
675 | ||
0619f0f5 | 676 | fsi->state->checkreqprot = new_value ? 1 : 0; |
1da177e4 LT |
677 | length = count; |
678 | out: | |
8365a719 | 679 | kfree(page); |
1da177e4 LT |
680 | return length; |
681 | } | |
9c2e08c5 | 682 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
683 | .read = sel_read_checkreqprot, |
684 | .write = sel_write_checkreqprot, | |
57a62c23 | 685 | .llseek = generic_file_llseek, |
1da177e4 LT |
686 | }; |
687 | ||
f9df6458 AP |
688 | static ssize_t sel_write_validatetrans(struct file *file, |
689 | const char __user *buf, | |
690 | size_t count, loff_t *ppos) | |
691 | { | |
0619f0f5 SS |
692 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
693 | struct selinux_state *state = fsi->state; | |
f9df6458 AP |
694 | char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; |
695 | char *req = NULL; | |
696 | u32 osid, nsid, tsid; | |
697 | u16 tclass; | |
698 | int rc; | |
699 | ||
6b6bc620 SS |
700 | rc = avc_has_perm(&selinux_state, |
701 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 702 | SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); |
f9df6458 AP |
703 | if (rc) |
704 | goto out; | |
705 | ||
706 | rc = -ENOMEM; | |
707 | if (count >= PAGE_SIZE) | |
708 | goto out; | |
709 | ||
710 | /* No partial writes. */ | |
711 | rc = -EINVAL; | |
712 | if (*ppos != 0) | |
713 | goto out; | |
714 | ||
0b884d25 AV |
715 | req = memdup_user_nul(buf, count); |
716 | if (IS_ERR(req)) { | |
717 | rc = PTR_ERR(req); | |
718 | req = NULL; | |
f9df6458 | 719 | goto out; |
0b884d25 | 720 | } |
f9df6458 AP |
721 | |
722 | rc = -ENOMEM; | |
723 | oldcon = kzalloc(count + 1, GFP_KERNEL); | |
724 | if (!oldcon) | |
725 | goto out; | |
726 | ||
727 | newcon = kzalloc(count + 1, GFP_KERNEL); | |
728 | if (!newcon) | |
729 | goto out; | |
730 | ||
731 | taskcon = kzalloc(count + 1, GFP_KERNEL); | |
732 | if (!taskcon) | |
733 | goto out; | |
734 | ||
735 | rc = -EINVAL; | |
736 | if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) | |
737 | goto out; | |
738 | ||
0619f0f5 | 739 | rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); |
f9df6458 AP |
740 | if (rc) |
741 | goto out; | |
742 | ||
0619f0f5 | 743 | rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); |
f9df6458 AP |
744 | if (rc) |
745 | goto out; | |
746 | ||
0619f0f5 | 747 | rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); |
f9df6458 AP |
748 | if (rc) |
749 | goto out; | |
750 | ||
0619f0f5 | 751 | rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); |
f9df6458 AP |
752 | if (!rc) |
753 | rc = count; | |
754 | out: | |
755 | kfree(req); | |
756 | kfree(oldcon); | |
757 | kfree(newcon); | |
758 | kfree(taskcon); | |
759 | return rc; | |
760 | } | |
761 | ||
762 | static const struct file_operations sel_transition_ops = { | |
763 | .write = sel_write_validatetrans, | |
764 | .llseek = generic_file_llseek, | |
765 | }; | |
766 | ||
1da177e4 LT |
767 | /* |
768 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
769 | */ | |
1872981b EP |
770 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
771 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
772 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
773 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
774 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 LT |
775 | |
776 | static ssize_t (*write_op[])(struct file *, char *, size_t) = { | |
777 | [SEL_ACCESS] = sel_write_access, | |
778 | [SEL_CREATE] = sel_write_create, | |
779 | [SEL_RELABEL] = sel_write_relabel, | |
780 | [SEL_USER] = sel_write_user, | |
781 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 782 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
783 | }; |
784 | ||
785 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
786 | { | |
496ad9aa | 787 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
788 | char *data; |
789 | ssize_t rv; | |
790 | ||
6e20a64a | 791 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
792 | return -EINVAL; |
793 | ||
794 | data = simple_transaction_get(file, buf, size); | |
795 | if (IS_ERR(data)) | |
796 | return PTR_ERR(data); | |
797 | ||
1872981b EP |
798 | rv = write_op[ino](file, data, size); |
799 | if (rv > 0) { | |
1da177e4 LT |
800 | simple_transaction_set(file, rv); |
801 | rv = size; | |
802 | } | |
803 | return rv; | |
804 | } | |
805 | ||
9c2e08c5 | 806 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
807 | .write = selinux_transaction_write, |
808 | .read = simple_transaction_read, | |
809 | .release = simple_transaction_release, | |
57a62c23 | 810 | .llseek = generic_file_llseek, |
1da177e4 LT |
811 | }; |
812 | ||
813 | /* | |
814 | * payload - write methods | |
815 | * If the method has a response, the response should be put in buf, | |
816 | * and the length returned. Otherwise return 0 or and -error. | |
817 | */ | |
818 | ||
1872981b | 819 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 | 820 | { |
0619f0f5 SS |
821 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
822 | struct selinux_state *state = fsi->state; | |
b77a493b | 823 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
824 | u32 ssid, tsid; |
825 | u16 tclass; | |
1da177e4 LT |
826 | struct av_decision avd; |
827 | ssize_t length; | |
828 | ||
6b6bc620 SS |
829 | length = avc_has_perm(&selinux_state, |
830 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 831 | SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); |
1da177e4 | 832 | if (length) |
b77a493b | 833 | goto out; |
1da177e4 LT |
834 | |
835 | length = -ENOMEM; | |
c1a7368a | 836 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 837 | if (!scon) |
b77a493b | 838 | goto out; |
1da177e4 | 839 | |
b77a493b | 840 | length = -ENOMEM; |
c1a7368a | 841 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
842 | if (!tcon) |
843 | goto out; | |
1da177e4 LT |
844 | |
845 | length = -EINVAL; | |
19439d05 | 846 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
b77a493b | 847 | goto out; |
1da177e4 | 848 | |
0619f0f5 | 849 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
850 | if (length) |
851 | goto out; | |
852 | ||
0619f0f5 | 853 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
854 | if (length) |
855 | goto out; | |
1da177e4 | 856 | |
0619f0f5 | 857 | security_compute_av_user(state, ssid, tsid, tclass, &avd); |
1da177e4 LT |
858 | |
859 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
8a6f83af | 860 | "%x %x %x %x %u %x", |
f1c6381a | 861 | avd.allowed, 0xffffffff, |
1da177e4 | 862 | avd.auditallow, avd.auditdeny, |
8a6f83af | 863 | avd.seqno, avd.flags); |
1da177e4 | 864 | out: |
b77a493b | 865 | kfree(tcon); |
1da177e4 LT |
866 | kfree(scon); |
867 | return length; | |
868 | } | |
869 | ||
1872981b | 870 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 | 871 | { |
0619f0f5 SS |
872 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
873 | struct selinux_state *state = fsi->state; | |
b77a493b | 874 | char *scon = NULL, *tcon = NULL; |
f50a3ec9 | 875 | char *namebuf = NULL, *objname = NULL; |
1da177e4 LT |
876 | u32 ssid, tsid, newsid; |
877 | u16 tclass; | |
878 | ssize_t length; | |
b77a493b | 879 | char *newcon = NULL; |
1da177e4 | 880 | u32 len; |
f50a3ec9 | 881 | int nargs; |
1da177e4 | 882 | |
6b6bc620 SS |
883 | length = avc_has_perm(&selinux_state, |
884 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
885 | SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, |
886 | NULL); | |
1da177e4 | 887 | if (length) |
b77a493b | 888 | goto out; |
1da177e4 LT |
889 | |
890 | length = -ENOMEM; | |
c1a7368a | 891 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 892 | if (!scon) |
b77a493b | 893 | goto out; |
1da177e4 | 894 | |
b77a493b | 895 | length = -ENOMEM; |
c1a7368a | 896 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
897 | if (!tcon) |
898 | goto out; | |
1da177e4 | 899 | |
f50a3ec9 KK |
900 | length = -ENOMEM; |
901 | namebuf = kzalloc(size + 1, GFP_KERNEL); | |
902 | if (!namebuf) | |
903 | goto out; | |
904 | ||
1da177e4 | 905 | length = -EINVAL; |
f50a3ec9 KK |
906 | nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); |
907 | if (nargs < 3 || nargs > 4) | |
b77a493b | 908 | goto out; |
0f7e4c33 KK |
909 | if (nargs == 4) { |
910 | /* | |
911 | * If and when the name of new object to be queried contains | |
912 | * either whitespace or multibyte characters, they shall be | |
913 | * encoded based on the percentage-encoding rule. | |
914 | * If not encoded, the sscanf logic picks up only left-half | |
915 | * of the supplied name; splitted by a whitespace unexpectedly. | |
916 | */ | |
917 | char *r, *w; | |
918 | int c1, c2; | |
919 | ||
920 | r = w = namebuf; | |
921 | do { | |
922 | c1 = *r++; | |
923 | if (c1 == '+') | |
924 | c1 = ' '; | |
925 | else if (c1 == '%') { | |
af7ff2c2 AS |
926 | c1 = hex_to_bin(*r++); |
927 | if (c1 < 0) | |
0f7e4c33 | 928 | goto out; |
af7ff2c2 AS |
929 | c2 = hex_to_bin(*r++); |
930 | if (c2 < 0) | |
0f7e4c33 KK |
931 | goto out; |
932 | c1 = (c1 << 4) | c2; | |
933 | } | |
934 | *w++ = c1; | |
935 | } while (c1 != '\0'); | |
936 | ||
f50a3ec9 | 937 | objname = namebuf; |
0f7e4c33 | 938 | } |
1da177e4 | 939 | |
0619f0f5 | 940 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
941 | if (length) |
942 | goto out; | |
943 | ||
0619f0f5 | 944 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
945 | if (length) |
946 | goto out; | |
1da177e4 | 947 | |
0619f0f5 SS |
948 | length = security_transition_sid_user(state, ssid, tsid, tclass, |
949 | objname, &newsid); | |
b77a493b EP |
950 | if (length) |
951 | goto out; | |
1da177e4 | 952 | |
0619f0f5 | 953 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
954 | if (length) |
955 | goto out; | |
1da177e4 | 956 | |
b77a493b | 957 | length = -ERANGE; |
1da177e4 | 958 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
744ba35e EP |
959 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
960 | "payload max\n", __func__, len); | |
b77a493b | 961 | goto out; |
1da177e4 LT |
962 | } |
963 | ||
964 | memcpy(buf, newcon, len); | |
965 | length = len; | |
b77a493b | 966 | out: |
1da177e4 | 967 | kfree(newcon); |
f50a3ec9 | 968 | kfree(namebuf); |
1da177e4 | 969 | kfree(tcon); |
1da177e4 LT |
970 | kfree(scon); |
971 | return length; | |
972 | } | |
973 | ||
1872981b | 974 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 | 975 | { |
0619f0f5 SS |
976 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
977 | struct selinux_state *state = fsi->state; | |
b77a493b | 978 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
979 | u32 ssid, tsid, newsid; |
980 | u16 tclass; | |
981 | ssize_t length; | |
b77a493b | 982 | char *newcon = NULL; |
1da177e4 LT |
983 | u32 len; |
984 | ||
6b6bc620 SS |
985 | length = avc_has_perm(&selinux_state, |
986 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
987 | SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, |
988 | NULL); | |
1da177e4 | 989 | if (length) |
b77a493b | 990 | goto out; |
1da177e4 LT |
991 | |
992 | length = -ENOMEM; | |
c1a7368a | 993 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 994 | if (!scon) |
b77a493b | 995 | goto out; |
1da177e4 | 996 | |
b77a493b | 997 | length = -ENOMEM; |
c1a7368a | 998 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
999 | if (!tcon) |
1000 | goto out; | |
1da177e4 LT |
1001 | |
1002 | length = -EINVAL; | |
1003 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
b77a493b | 1004 | goto out; |
1da177e4 | 1005 | |
0619f0f5 | 1006 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
1007 | if (length) |
1008 | goto out; | |
1009 | ||
0619f0f5 | 1010 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
1011 | if (length) |
1012 | goto out; | |
1da177e4 | 1013 | |
0619f0f5 | 1014 | length = security_change_sid(state, ssid, tsid, tclass, &newsid); |
b77a493b EP |
1015 | if (length) |
1016 | goto out; | |
1da177e4 | 1017 | |
0619f0f5 | 1018 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
1019 | if (length) |
1020 | goto out; | |
1da177e4 | 1021 | |
b77a493b EP |
1022 | length = -ERANGE; |
1023 | if (len > SIMPLE_TRANSACTION_LIMIT) | |
1024 | goto out; | |
1da177e4 LT |
1025 | |
1026 | memcpy(buf, newcon, len); | |
1027 | length = len; | |
b77a493b | 1028 | out: |
1da177e4 | 1029 | kfree(newcon); |
1da177e4 | 1030 | kfree(tcon); |
1da177e4 LT |
1031 | kfree(scon); |
1032 | return length; | |
1033 | } | |
1034 | ||
1872981b | 1035 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 | 1036 | { |
0619f0f5 SS |
1037 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1038 | struct selinux_state *state = fsi->state; | |
b77a493b EP |
1039 | char *con = NULL, *user = NULL, *ptr; |
1040 | u32 sid, *sids = NULL; | |
1da177e4 LT |
1041 | ssize_t length; |
1042 | char *newcon; | |
1043 | int i, rc; | |
1044 | u32 len, nsids; | |
1045 | ||
6b6bc620 SS |
1046 | length = avc_has_perm(&selinux_state, |
1047 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1048 | SECCLASS_SECURITY, SECURITY__COMPUTE_USER, |
1049 | NULL); | |
1da177e4 | 1050 | if (length) |
6eab04a8 | 1051 | goto out; |
1da177e4 LT |
1052 | |
1053 | length = -ENOMEM; | |
c1a7368a | 1054 | con = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 1055 | if (!con) |
6eab04a8 | 1056 | goto out; |
1da177e4 | 1057 | |
b77a493b | 1058 | length = -ENOMEM; |
c1a7368a | 1059 | user = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
1060 | if (!user) |
1061 | goto out; | |
1da177e4 LT |
1062 | |
1063 | length = -EINVAL; | |
1064 | if (sscanf(buf, "%s %s", con, user) != 2) | |
b77a493b | 1065 | goto out; |
1da177e4 | 1066 | |
0619f0f5 | 1067 | length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); |
b77a493b EP |
1068 | if (length) |
1069 | goto out; | |
1da177e4 | 1070 | |
0619f0f5 | 1071 | length = security_get_user_sids(state, sid, user, &sids, &nsids); |
b77a493b EP |
1072 | if (length) |
1073 | goto out; | |
1da177e4 LT |
1074 | |
1075 | length = sprintf(buf, "%u", nsids) + 1; | |
1076 | ptr = buf + length; | |
1077 | for (i = 0; i < nsids; i++) { | |
0619f0f5 | 1078 | rc = security_sid_to_context(state, sids[i], &newcon, &len); |
1da177e4 LT |
1079 | if (rc) { |
1080 | length = rc; | |
b77a493b | 1081 | goto out; |
1da177e4 LT |
1082 | } |
1083 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
1084 | kfree(newcon); | |
1085 | length = -ERANGE; | |
b77a493b | 1086 | goto out; |
1da177e4 LT |
1087 | } |
1088 | memcpy(ptr, newcon, len); | |
1089 | kfree(newcon); | |
1090 | ptr += len; | |
1091 | length += len; | |
1092 | } | |
b77a493b | 1093 | out: |
1da177e4 | 1094 | kfree(sids); |
1da177e4 | 1095 | kfree(user); |
1da177e4 LT |
1096 | kfree(con); |
1097 | return length; | |
1098 | } | |
1099 | ||
1872981b | 1100 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 | 1101 | { |
0619f0f5 SS |
1102 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1103 | struct selinux_state *state = fsi->state; | |
b77a493b | 1104 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
1105 | u32 ssid, tsid, newsid; |
1106 | u16 tclass; | |
1107 | ssize_t length; | |
b77a493b | 1108 | char *newcon = NULL; |
1da177e4 LT |
1109 | u32 len; |
1110 | ||
6b6bc620 SS |
1111 | length = avc_has_perm(&selinux_state, |
1112 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1113 | SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, |
1114 | NULL); | |
1da177e4 | 1115 | if (length) |
b77a493b | 1116 | goto out; |
1da177e4 LT |
1117 | |
1118 | length = -ENOMEM; | |
c1a7368a | 1119 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 1120 | if (!scon) |
6eab04a8 | 1121 | goto out; |
1da177e4 | 1122 | |
b77a493b | 1123 | length = -ENOMEM; |
c1a7368a | 1124 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
1125 | if (!tcon) |
1126 | goto out; | |
1da177e4 LT |
1127 | |
1128 | length = -EINVAL; | |
1129 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
b77a493b | 1130 | goto out; |
1da177e4 | 1131 | |
0619f0f5 | 1132 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
1133 | if (length) |
1134 | goto out; | |
1135 | ||
0619f0f5 | 1136 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
1137 | if (length) |
1138 | goto out; | |
1da177e4 | 1139 | |
0619f0f5 | 1140 | length = security_member_sid(state, ssid, tsid, tclass, &newsid); |
b77a493b EP |
1141 | if (length) |
1142 | goto out; | |
1da177e4 | 1143 | |
0619f0f5 | 1144 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
1145 | if (length) |
1146 | goto out; | |
1da177e4 | 1147 | |
b77a493b | 1148 | length = -ERANGE; |
1da177e4 | 1149 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
744ba35e EP |
1150 | printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " |
1151 | "payload max\n", __func__, len); | |
b77a493b | 1152 | goto out; |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | memcpy(buf, newcon, len); | |
1156 | length = len; | |
b77a493b | 1157 | out: |
1da177e4 | 1158 | kfree(newcon); |
1da177e4 | 1159 | kfree(tcon); |
1da177e4 LT |
1160 | kfree(scon); |
1161 | return length; | |
1162 | } | |
1163 | ||
1164 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
1165 | { | |
1166 | struct inode *ret = new_inode(sb); | |
1167 | ||
1168 | if (ret) { | |
1169 | ret->i_mode = mode; | |
078cd827 | 1170 | ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); |
1da177e4 LT |
1171 | } |
1172 | return ret; | |
1173 | } | |
1174 | ||
1da177e4 LT |
1175 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
1176 | size_t count, loff_t *ppos) | |
1177 | { | |
0619f0f5 | 1178 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 LT |
1179 | char *page = NULL; |
1180 | ssize_t length; | |
1da177e4 LT |
1181 | ssize_t ret; |
1182 | int cur_enforcing; | |
496ad9aa | 1183 | unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; |
d313f948 | 1184 | const char *name = filep->f_path.dentry->d_name.name; |
1da177e4 | 1185 | |
0619f0f5 | 1186 | mutex_lock(&fsi->mutex); |
1da177e4 | 1187 | |
b77a493b | 1188 | ret = -EINVAL; |
0619f0f5 SS |
1189 | if (index >= fsi->bool_num || strcmp(name, |
1190 | fsi->bool_pending_names[index])) | |
d313f948 | 1191 | goto out; |
1da177e4 | 1192 | |
b77a493b | 1193 | ret = -ENOMEM; |
1872981b | 1194 | page = (char *)get_zeroed_page(GFP_KERNEL); |
b77a493b | 1195 | if (!page) |
1da177e4 | 1196 | goto out; |
1da177e4 | 1197 | |
0619f0f5 | 1198 | cur_enforcing = security_get_bool_value(fsi->state, index); |
1da177e4 LT |
1199 | if (cur_enforcing < 0) { |
1200 | ret = cur_enforcing; | |
1201 | goto out; | |
1202 | } | |
1da177e4 | 1203 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
0619f0f5 | 1204 | fsi->bool_pending_values[index]); |
68bdcf28 | 1205 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1da177e4 | 1206 | out: |
0619f0f5 | 1207 | mutex_unlock(&fsi->mutex); |
b77a493b | 1208 | free_page((unsigned long)page); |
1da177e4 LT |
1209 | return ret; |
1210 | } | |
1211 | ||
1212 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
1213 | size_t count, loff_t *ppos) | |
1214 | { | |
0619f0f5 | 1215 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 | 1216 | char *page = NULL; |
d313f948 | 1217 | ssize_t length; |
1da177e4 | 1218 | int new_value; |
496ad9aa | 1219 | unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; |
d313f948 | 1220 | const char *name = filep->f_path.dentry->d_name.name; |
1da177e4 | 1221 | |
0619f0f5 | 1222 | mutex_lock(&fsi->mutex); |
1da177e4 | 1223 | |
6b6bc620 SS |
1224 | length = avc_has_perm(&selinux_state, |
1225 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1226 | SECCLASS_SECURITY, SECURITY__SETBOOL, |
1227 | NULL); | |
1da177e4 LT |
1228 | if (length) |
1229 | goto out; | |
1230 | ||
b77a493b | 1231 | length = -EINVAL; |
0619f0f5 SS |
1232 | if (index >= fsi->bool_num || strcmp(name, |
1233 | fsi->bool_pending_names[index])) | |
d313f948 | 1234 | goto out; |
d313f948 | 1235 | |
b77a493b EP |
1236 | length = -ENOMEM; |
1237 | if (count >= PAGE_SIZE) | |
1da177e4 | 1238 | goto out; |
d313f948 | 1239 | |
b77a493b EP |
1240 | /* No partial writes. */ |
1241 | length = -EINVAL; | |
1242 | if (*ppos != 0) | |
1da177e4 | 1243 | goto out; |
b77a493b | 1244 | |
8365a719 AV |
1245 | page = memdup_user_nul(buf, count); |
1246 | if (IS_ERR(page)) { | |
1247 | length = PTR_ERR(page); | |
1248 | page = NULL; | |
1da177e4 | 1249 | goto out; |
8365a719 | 1250 | } |
1da177e4 LT |
1251 | |
1252 | length = -EINVAL; | |
1253 | if (sscanf(page, "%d", &new_value) != 1) | |
1254 | goto out; | |
1255 | ||
1256 | if (new_value) | |
1257 | new_value = 1; | |
1258 | ||
0619f0f5 | 1259 | fsi->bool_pending_values[index] = new_value; |
1da177e4 LT |
1260 | length = count; |
1261 | ||
1262 | out: | |
0619f0f5 | 1263 | mutex_unlock(&fsi->mutex); |
8365a719 | 1264 | kfree(page); |
1da177e4 LT |
1265 | return length; |
1266 | } | |
1267 | ||
9c2e08c5 | 1268 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
1269 | .read = sel_read_bool, |
1270 | .write = sel_write_bool, | |
57a62c23 | 1271 | .llseek = generic_file_llseek, |
1da177e4 LT |
1272 | }; |
1273 | ||
1274 | static ssize_t sel_commit_bools_write(struct file *filep, | |
1275 | const char __user *buf, | |
1276 | size_t count, loff_t *ppos) | |
1277 | { | |
0619f0f5 | 1278 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 | 1279 | char *page = NULL; |
d313f948 | 1280 | ssize_t length; |
1da177e4 LT |
1281 | int new_value; |
1282 | ||
0619f0f5 | 1283 | mutex_lock(&fsi->mutex); |
1da177e4 | 1284 | |
6b6bc620 SS |
1285 | length = avc_has_perm(&selinux_state, |
1286 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1287 | SECCLASS_SECURITY, SECURITY__SETBOOL, |
1288 | NULL); | |
1da177e4 LT |
1289 | if (length) |
1290 | goto out; | |
1291 | ||
b77a493b EP |
1292 | length = -ENOMEM; |
1293 | if (count >= PAGE_SIZE) | |
1da177e4 | 1294 | goto out; |
b77a493b EP |
1295 | |
1296 | /* No partial writes. */ | |
1297 | length = -EINVAL; | |
1298 | if (*ppos != 0) | |
1da177e4 | 1299 | goto out; |
b77a493b | 1300 | |
8365a719 AV |
1301 | page = memdup_user_nul(buf, count); |
1302 | if (IS_ERR(page)) { | |
1303 | length = PTR_ERR(page); | |
1304 | page = NULL; | |
1da177e4 | 1305 | goto out; |
8365a719 | 1306 | } |
1da177e4 LT |
1307 | |
1308 | length = -EINVAL; | |
1309 | if (sscanf(page, "%d", &new_value) != 1) | |
1310 | goto out; | |
1311 | ||
b77a493b | 1312 | length = 0; |
0619f0f5 SS |
1313 | if (new_value && fsi->bool_pending_values) |
1314 | length = security_set_bools(fsi->state, fsi->bool_num, | |
1315 | fsi->bool_pending_values); | |
1da177e4 | 1316 | |
b77a493b EP |
1317 | if (!length) |
1318 | length = count; | |
1da177e4 LT |
1319 | |
1320 | out: | |
0619f0f5 | 1321 | mutex_unlock(&fsi->mutex); |
8365a719 | 1322 | kfree(page); |
1da177e4 LT |
1323 | return length; |
1324 | } | |
1325 | ||
9c2e08c5 | 1326 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 1327 | .write = sel_commit_bools_write, |
57a62c23 | 1328 | .llseek = generic_file_llseek, |
1da177e4 LT |
1329 | }; |
1330 | ||
0c92d7c7 | 1331 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1332 | { |
ad52184b AV |
1333 | d_genocide(de); |
1334 | shrink_dcache_parent(de); | |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | #define BOOL_DIR_NAME "booleans" | |
1338 | ||
0619f0f5 | 1339 | static int sel_make_bools(struct selinux_fs_info *fsi) |
1da177e4 | 1340 | { |
b77a493b | 1341 | int i, ret; |
1da177e4 LT |
1342 | ssize_t len; |
1343 | struct dentry *dentry = NULL; | |
0619f0f5 | 1344 | struct dentry *dir = fsi->bool_dir; |
1da177e4 LT |
1345 | struct inode *inode = NULL; |
1346 | struct inode_security_struct *isec; | |
1347 | char **names = NULL, *page; | |
1348 | int num; | |
1349 | int *values = NULL; | |
1350 | u32 sid; | |
1351 | ||
1352 | /* remove any existing files */ | |
0619f0f5 SS |
1353 | for (i = 0; i < fsi->bool_num; i++) |
1354 | kfree(fsi->bool_pending_names[i]); | |
1355 | kfree(fsi->bool_pending_names); | |
1356 | kfree(fsi->bool_pending_values); | |
1357 | fsi->bool_num = 0; | |
1358 | fsi->bool_pending_names = NULL; | |
1359 | fsi->bool_pending_values = NULL; | |
1da177e4 | 1360 | |
0c92d7c7 | 1361 | sel_remove_entries(dir); |
1da177e4 | 1362 | |
b77a493b | 1363 | ret = -ENOMEM; |
1872981b EP |
1364 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1365 | if (!page) | |
b77a493b | 1366 | goto out; |
1da177e4 | 1367 | |
0619f0f5 | 1368 | ret = security_get_bools(fsi->state, &num, &names, &values); |
b77a493b | 1369 | if (ret) |
1da177e4 LT |
1370 | goto out; |
1371 | ||
1372 | for (i = 0; i < num; i++) { | |
b77a493b | 1373 | ret = -ENOMEM; |
1da177e4 | 1374 | dentry = d_alloc_name(dir, names[i]); |
b77a493b EP |
1375 | if (!dentry) |
1376 | goto out; | |
1377 | ||
1378 | ret = -ENOMEM; | |
1da177e4 | 1379 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); |
b77a493b EP |
1380 | if (!inode) |
1381 | goto out; | |
1da177e4 | 1382 | |
b77a493b | 1383 | ret = -ENAMETOOLONG; |
cc1dad71 | 1384 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); |
b77a493b EP |
1385 | if (len >= PAGE_SIZE) |
1386 | goto out; | |
1387 | ||
1872981b | 1388 | isec = (struct inode_security_struct *)inode->i_security; |
0619f0f5 | 1389 | ret = security_genfs_sid(fsi->state, "selinuxfs", page, |
aa8e712c | 1390 | SECCLASS_FILE, &sid); |
4262fb51 | 1391 | if (ret) { |
900fde06 GT |
1392 | pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", |
1393 | page); | |
1394 | sid = SECINITSID_SECURITY; | |
4262fb51 GT |
1395 | } |
1396 | ||
1da177e4 | 1397 | isec->sid = sid; |
42059112 | 1398 | isec->initialized = LABEL_INITIALIZED; |
1da177e4 | 1399 | inode->i_fop = &sel_bool_ops; |
bce34bc0 | 1400 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1401 | d_add(dentry, inode); |
1402 | } | |
0619f0f5 SS |
1403 | fsi->bool_num = num; |
1404 | fsi->bool_pending_names = names; | |
1405 | fsi->bool_pending_values = values; | |
b77a493b EP |
1406 | |
1407 | free_page((unsigned long)page); | |
1408 | return 0; | |
1da177e4 LT |
1409 | out: |
1410 | free_page((unsigned long)page); | |
b77a493b | 1411 | |
1da177e4 | 1412 | if (names) { |
9a5f04bf JJ |
1413 | for (i = 0; i < num; i++) |
1414 | kfree(names[i]); | |
1da177e4 LT |
1415 | kfree(names); |
1416 | } | |
20c19e41 | 1417 | kfree(values); |
0c92d7c7 | 1418 | sel_remove_entries(dir); |
b77a493b EP |
1419 | |
1420 | return ret; | |
1da177e4 LT |
1421 | } |
1422 | ||
1da177e4 LT |
1423 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, |
1424 | size_t count, loff_t *ppos) | |
1425 | { | |
6b6bc620 SS |
1426 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1427 | struct selinux_state *state = fsi->state; | |
1da177e4 LT |
1428 | char tmpbuf[TMPBUFLEN]; |
1429 | ssize_t length; | |
1430 | ||
6b6bc620 SS |
1431 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", |
1432 | avc_get_cache_threshold(state->avc)); | |
1da177e4 LT |
1433 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
1434 | } | |
1435 | ||
1872981b EP |
1436 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1437 | const char __user *buf, | |
1da177e4 LT |
1438 | size_t count, loff_t *ppos) |
1439 | ||
1440 | { | |
6b6bc620 SS |
1441 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1442 | struct selinux_state *state = fsi->state; | |
8365a719 | 1443 | char *page; |
1da177e4 | 1444 | ssize_t ret; |
309c5fad | 1445 | unsigned int new_value; |
1da177e4 | 1446 | |
6b6bc620 SS |
1447 | ret = avc_has_perm(&selinux_state, |
1448 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1449 | SECCLASS_SECURITY, SECURITY__SETSECPARAM, |
1450 | NULL); | |
b77a493b | 1451 | if (ret) |
8365a719 | 1452 | return ret; |
1da177e4 | 1453 | |
b77a493b | 1454 | if (count >= PAGE_SIZE) |
8365a719 | 1455 | return -ENOMEM; |
1da177e4 | 1456 | |
b77a493b | 1457 | /* No partial writes. */ |
b77a493b | 1458 | if (*ppos != 0) |
8365a719 | 1459 | return -EINVAL; |
1da177e4 | 1460 | |
8365a719 AV |
1461 | page = memdup_user_nul(buf, count); |
1462 | if (IS_ERR(page)) | |
1463 | return PTR_ERR(page); | |
1da177e4 | 1464 | |
b77a493b EP |
1465 | ret = -EINVAL; |
1466 | if (sscanf(page, "%u", &new_value) != 1) | |
1da177e4 | 1467 | goto out; |
1da177e4 | 1468 | |
6b6bc620 | 1469 | avc_set_cache_threshold(state->avc, new_value); |
b77a493b | 1470 | |
1da177e4 | 1471 | ret = count; |
1da177e4 | 1472 | out: |
8365a719 | 1473 | kfree(page); |
1da177e4 LT |
1474 | return ret; |
1475 | } | |
1476 | ||
1477 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1478 | size_t count, loff_t *ppos) | |
1479 | { | |
6b6bc620 SS |
1480 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1481 | struct selinux_state *state = fsi->state; | |
1da177e4 | 1482 | char *page; |
b77a493b | 1483 | ssize_t length; |
1da177e4 LT |
1484 | |
1485 | page = (char *)__get_free_page(GFP_KERNEL); | |
b77a493b EP |
1486 | if (!page) |
1487 | return -ENOMEM; | |
1488 | ||
6b6bc620 | 1489 | length = avc_get_hash_stats(state->avc, page); |
b77a493b EP |
1490 | if (length >= 0) |
1491 | length = simple_read_from_buffer(buf, count, ppos, page, length); | |
1da177e4 | 1492 | free_page((unsigned long)page); |
b77a493b EP |
1493 | |
1494 | return length; | |
1da177e4 LT |
1495 | } |
1496 | ||
9c2e08c5 | 1497 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1498 | .read = sel_read_avc_cache_threshold, |
1499 | .write = sel_write_avc_cache_threshold, | |
57a62c23 | 1500 | .llseek = generic_file_llseek, |
1da177e4 LT |
1501 | }; |
1502 | ||
9c2e08c5 | 1503 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 | 1504 | .read = sel_read_avc_hash_stats, |
57a62c23 | 1505 | .llseek = generic_file_llseek, |
1da177e4 LT |
1506 | }; |
1507 | ||
1508 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1509 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1510 | { | |
1511 | int cpu; | |
1512 | ||
4f4b6c1a | 1513 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1514 | if (!cpu_possible(cpu)) |
1515 | continue; | |
1516 | *idx = cpu + 1; | |
1517 | return &per_cpu(avc_cache_stats, cpu); | |
1518 | } | |
1519 | return NULL; | |
1520 | } | |
1521 | ||
1522 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1523 | { | |
1524 | loff_t n = *pos - 1; | |
1525 | ||
1526 | if (*pos == 0) | |
1527 | return SEQ_START_TOKEN; | |
1528 | ||
1529 | return sel_avc_get_stat_idx(&n); | |
1530 | } | |
1531 | ||
1532 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1533 | { | |
1534 | return sel_avc_get_stat_idx(pos); | |
1535 | } | |
1536 | ||
1537 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1538 | { | |
1539 | struct avc_cache_stats *st = v; | |
1540 | ||
710a0647 ME |
1541 | if (v == SEQ_START_TOKEN) { |
1542 | seq_puts(seq, | |
1543 | "lookups hits misses allocations reclaims frees\n"); | |
1544 | } else { | |
257313b2 LT |
1545 | unsigned int lookups = st->lookups; |
1546 | unsigned int misses = st->misses; | |
1547 | unsigned int hits = lookups - misses; | |
1548 | seq_printf(seq, "%u %u %u %u %u %u\n", lookups, | |
1549 | hits, misses, st->allocations, | |
1da177e4 | 1550 | st->reclaims, st->frees); |
257313b2 | 1551 | } |
1da177e4 LT |
1552 | return 0; |
1553 | } | |
1554 | ||
1555 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1556 | { } | |
1557 | ||
1996a109 | 1558 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1559 | .start = sel_avc_stats_seq_start, |
1560 | .next = sel_avc_stats_seq_next, | |
1561 | .show = sel_avc_stats_seq_show, | |
1562 | .stop = sel_avc_stats_seq_stop, | |
1563 | }; | |
1564 | ||
1565 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1566 | { | |
1567 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1568 | } | |
1569 | ||
9c2e08c5 | 1570 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1571 | .open = sel_open_avc_cache_stats, |
1572 | .read = seq_read, | |
1573 | .llseek = seq_lseek, | |
1574 | .release = seq_release, | |
1575 | }; | |
1576 | #endif | |
1577 | ||
1578 | static int sel_make_avc_files(struct dentry *dir) | |
1579 | { | |
0619f0f5 SS |
1580 | struct super_block *sb = dir->d_sb; |
1581 | struct selinux_fs_info *fsi = sb->s_fs_info; | |
b77a493b | 1582 | int i; |
cda37124 | 1583 | static const struct tree_descr files[] = { |
1da177e4 LT |
1584 | { "cache_threshold", |
1585 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1586 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1587 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1588 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1589 | #endif | |
1590 | }; | |
1591 | ||
6e20a64a | 1592 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1593 | struct inode *inode; |
1594 | struct dentry *dentry; | |
1595 | ||
1596 | dentry = d_alloc_name(dir, files[i].name); | |
b77a493b EP |
1597 | if (!dentry) |
1598 | return -ENOMEM; | |
1da177e4 LT |
1599 | |
1600 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
b77a493b EP |
1601 | if (!inode) |
1602 | return -ENOMEM; | |
1603 | ||
1da177e4 | 1604 | inode->i_fop = files[i].ops; |
0619f0f5 | 1605 | inode->i_ino = ++fsi->last_ino; |
1da177e4 LT |
1606 | d_add(dentry, inode); |
1607 | } | |
b77a493b EP |
1608 | |
1609 | return 0; | |
1da177e4 LT |
1610 | } |
1611 | ||
1872981b | 1612 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1613 | size_t count, loff_t *ppos) |
1614 | { | |
0619f0f5 | 1615 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
f0ee2e46 JC |
1616 | char *con; |
1617 | u32 sid, len; | |
1618 | ssize_t ret; | |
1619 | ||
496ad9aa | 1620 | sid = file_inode(file)->i_ino&SEL_INO_MASK; |
0619f0f5 | 1621 | ret = security_sid_to_context(fsi->state, sid, &con, &len); |
b77a493b | 1622 | if (ret) |
f0ee2e46 JC |
1623 | return ret; |
1624 | ||
1625 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1626 | kfree(con); | |
1627 | return ret; | |
1628 | } | |
1629 | ||
1630 | static const struct file_operations sel_initcon_ops = { | |
1631 | .read = sel_read_initcon, | |
57a62c23 | 1632 | .llseek = generic_file_llseek, |
f0ee2e46 JC |
1633 | }; |
1634 | ||
1635 | static int sel_make_initcon_files(struct dentry *dir) | |
1636 | { | |
b77a493b | 1637 | int i; |
f0ee2e46 JC |
1638 | |
1639 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1640 | struct inode *inode; | |
1641 | struct dentry *dentry; | |
1642 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
b77a493b EP |
1643 | if (!dentry) |
1644 | return -ENOMEM; | |
f0ee2e46 JC |
1645 | |
1646 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
b77a493b EP |
1647 | if (!inode) |
1648 | return -ENOMEM; | |
1649 | ||
f0ee2e46 JC |
1650 | inode->i_fop = &sel_initcon_ops; |
1651 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1652 | d_add(dentry, inode); | |
1653 | } | |
b77a493b EP |
1654 | |
1655 | return 0; | |
f0ee2e46 JC |
1656 | } |
1657 | ||
e47c8fc5 CP |
1658 | static inline unsigned long sel_class_to_ino(u16 class) |
1659 | { | |
1660 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1661 | } | |
1662 | ||
1663 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1664 | { | |
92ae9e82 | 1665 | return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); |
e47c8fc5 CP |
1666 | } |
1667 | ||
1668 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1669 | { | |
1670 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1671 | } | |
1672 | ||
1673 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1674 | { | |
1675 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1676 | } | |
1677 | ||
1872981b | 1678 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1679 | size_t count, loff_t *ppos) |
1680 | { | |
496ad9aa | 1681 | unsigned long ino = file_inode(file)->i_ino; |
cc1dad71 AV |
1682 | char res[TMPBUFLEN]; |
1683 | ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); | |
1684 | return simple_read_from_buffer(buf, count, ppos, res, len); | |
e47c8fc5 CP |
1685 | } |
1686 | ||
1687 | static const struct file_operations sel_class_ops = { | |
1688 | .read = sel_read_class, | |
57a62c23 | 1689 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1690 | }; |
1691 | ||
1872981b | 1692 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1693 | size_t count, loff_t *ppos) |
1694 | { | |
496ad9aa | 1695 | unsigned long ino = file_inode(file)->i_ino; |
cc1dad71 AV |
1696 | char res[TMPBUFLEN]; |
1697 | ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); | |
1698 | return simple_read_from_buffer(buf, count, ppos, res, len); | |
e47c8fc5 CP |
1699 | } |
1700 | ||
1701 | static const struct file_operations sel_perm_ops = { | |
1702 | .read = sel_read_perm, | |
57a62c23 | 1703 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1704 | }; |
1705 | ||
3bb56b25 PM |
1706 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1707 | size_t count, loff_t *ppos) | |
1708 | { | |
0619f0f5 | 1709 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
3bb56b25 PM |
1710 | int value; |
1711 | char tmpbuf[TMPBUFLEN]; | |
1712 | ssize_t length; | |
496ad9aa | 1713 | unsigned long i_ino = file_inode(file)->i_ino; |
3bb56b25 | 1714 | |
0619f0f5 | 1715 | value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); |
3bb56b25 PM |
1716 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); |
1717 | ||
1718 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1719 | } | |
1720 | ||
1721 | static const struct file_operations sel_policycap_ops = { | |
1722 | .read = sel_read_policycap, | |
57a62c23 | 1723 | .llseek = generic_file_llseek, |
3bb56b25 PM |
1724 | }; |
1725 | ||
e47c8fc5 CP |
1726 | static int sel_make_perm_files(char *objclass, int classvalue, |
1727 | struct dentry *dir) | |
1728 | { | |
0619f0f5 | 1729 | struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; |
b77a493b | 1730 | int i, rc, nperms; |
e47c8fc5 CP |
1731 | char **perms; |
1732 | ||
0619f0f5 | 1733 | rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); |
e47c8fc5 | 1734 | if (rc) |
b77a493b | 1735 | return rc; |
e47c8fc5 CP |
1736 | |
1737 | for (i = 0; i < nperms; i++) { | |
1738 | struct inode *inode; | |
1739 | struct dentry *dentry; | |
1740 | ||
b77a493b | 1741 | rc = -ENOMEM; |
e47c8fc5 | 1742 | dentry = d_alloc_name(dir, perms[i]); |
b77a493b EP |
1743 | if (!dentry) |
1744 | goto out; | |
e47c8fc5 | 1745 | |
b77a493b | 1746 | rc = -ENOMEM; |
e47c8fc5 | 1747 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
b77a493b EP |
1748 | if (!inode) |
1749 | goto out; | |
1750 | ||
e47c8fc5 CP |
1751 | inode->i_fop = &sel_perm_ops; |
1752 | /* i+1 since perm values are 1-indexed */ | |
c1a7368a | 1753 | inode->i_ino = sel_perm_to_ino(classvalue, i + 1); |
e47c8fc5 CP |
1754 | d_add(dentry, inode); |
1755 | } | |
b77a493b EP |
1756 | rc = 0; |
1757 | out: | |
e47c8fc5 CP |
1758 | for (i = 0; i < nperms; i++) |
1759 | kfree(perms[i]); | |
1760 | kfree(perms); | |
e47c8fc5 CP |
1761 | return rc; |
1762 | } | |
1763 | ||
1764 | static int sel_make_class_dir_entries(char *classname, int index, | |
1765 | struct dentry *dir) | |
1766 | { | |
0619f0f5 SS |
1767 | struct super_block *sb = dir->d_sb; |
1768 | struct selinux_fs_info *fsi = sb->s_fs_info; | |
e47c8fc5 CP |
1769 | struct dentry *dentry = NULL; |
1770 | struct inode *inode = NULL; | |
1771 | int rc; | |
1772 | ||
1773 | dentry = d_alloc_name(dir, "index"); | |
b77a493b EP |
1774 | if (!dentry) |
1775 | return -ENOMEM; | |
e47c8fc5 CP |
1776 | |
1777 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
b77a493b EP |
1778 | if (!inode) |
1779 | return -ENOMEM; | |
e47c8fc5 CP |
1780 | |
1781 | inode->i_fop = &sel_class_ops; | |
1782 | inode->i_ino = sel_class_to_ino(index); | |
1783 | d_add(dentry, inode); | |
1784 | ||
0619f0f5 | 1785 | dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); |
a1c2aa1e AV |
1786 | if (IS_ERR(dentry)) |
1787 | return PTR_ERR(dentry); | |
e47c8fc5 CP |
1788 | |
1789 | rc = sel_make_perm_files(classname, index, dentry); | |
1790 | ||
e47c8fc5 CP |
1791 | return rc; |
1792 | } | |
1793 | ||
0619f0f5 | 1794 | static int sel_make_classes(struct selinux_fs_info *fsi) |
e47c8fc5 | 1795 | { |
0619f0f5 | 1796 | |
b77a493b | 1797 | int rc, nclasses, i; |
e47c8fc5 CP |
1798 | char **classes; |
1799 | ||
1800 | /* delete any existing entries */ | |
0619f0f5 | 1801 | sel_remove_entries(fsi->class_dir); |
e47c8fc5 | 1802 | |
0619f0f5 | 1803 | rc = security_get_classes(fsi->state, &classes, &nclasses); |
b77a493b EP |
1804 | if (rc) |
1805 | return rc; | |
e47c8fc5 CP |
1806 | |
1807 | /* +2 since classes are 1-indexed */ | |
0619f0f5 | 1808 | fsi->last_class_ino = sel_class_to_ino(nclasses + 2); |
e47c8fc5 CP |
1809 | |
1810 | for (i = 0; i < nclasses; i++) { | |
1811 | struct dentry *class_name_dir; | |
1812 | ||
0619f0f5 SS |
1813 | class_name_dir = sel_make_dir(fsi->class_dir, classes[i], |
1814 | &fsi->last_class_ino); | |
a1c2aa1e AV |
1815 | if (IS_ERR(class_name_dir)) { |
1816 | rc = PTR_ERR(class_name_dir); | |
b77a493b | 1817 | goto out; |
a1c2aa1e | 1818 | } |
e47c8fc5 CP |
1819 | |
1820 | /* i+1 since class values are 1-indexed */ | |
c1a7368a | 1821 | rc = sel_make_class_dir_entries(classes[i], i + 1, |
e47c8fc5 CP |
1822 | class_name_dir); |
1823 | if (rc) | |
b77a493b | 1824 | goto out; |
e47c8fc5 | 1825 | } |
b77a493b EP |
1826 | rc = 0; |
1827 | out: | |
e47c8fc5 CP |
1828 | for (i = 0; i < nclasses; i++) |
1829 | kfree(classes[i]); | |
1830 | kfree(classes); | |
e47c8fc5 CP |
1831 | return rc; |
1832 | } | |
1833 | ||
0619f0f5 | 1834 | static int sel_make_policycap(struct selinux_fs_info *fsi) |
3bb56b25 PM |
1835 | { |
1836 | unsigned int iter; | |
1837 | struct dentry *dentry = NULL; | |
1838 | struct inode *inode = NULL; | |
1839 | ||
0619f0f5 | 1840 | sel_remove_entries(fsi->policycap_dir); |
3bb56b25 PM |
1841 | |
1842 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
4dc2fce3 | 1843 | if (iter < ARRAY_SIZE(selinux_policycap_names)) |
0619f0f5 | 1844 | dentry = d_alloc_name(fsi->policycap_dir, |
4dc2fce3 | 1845 | selinux_policycap_names[iter]); |
3bb56b25 | 1846 | else |
0619f0f5 | 1847 | dentry = d_alloc_name(fsi->policycap_dir, "unknown"); |
3bb56b25 PM |
1848 | |
1849 | if (dentry == NULL) | |
1850 | return -ENOMEM; | |
1851 | ||
0619f0f5 | 1852 | inode = sel_make_inode(fsi->sb, S_IFREG | 0444); |
3bb56b25 PM |
1853 | if (inode == NULL) |
1854 | return -ENOMEM; | |
1855 | ||
1856 | inode->i_fop = &sel_policycap_ops; | |
1857 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1858 | d_add(dentry, inode); | |
1859 | } | |
1860 | ||
1861 | return 0; | |
1862 | } | |
1863 | ||
a1c2aa1e | 1864 | static struct dentry *sel_make_dir(struct dentry *dir, const char *name, |
0dd4ae51 | 1865 | unsigned long *ino) |
1da177e4 | 1866 | { |
a1c2aa1e | 1867 | struct dentry *dentry = d_alloc_name(dir, name); |
1da177e4 LT |
1868 | struct inode *inode; |
1869 | ||
a1c2aa1e AV |
1870 | if (!dentry) |
1871 | return ERR_PTR(-ENOMEM); | |
1872 | ||
1873 | inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); | |
1874 | if (!inode) { | |
1875 | dput(dentry); | |
1876 | return ERR_PTR(-ENOMEM); | |
1877 | } | |
b77a493b | 1878 | |
1da177e4 LT |
1879 | inode->i_op = &simple_dir_inode_operations; |
1880 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1881 | inode->i_ino = ++(*ino); |
40e906f8 | 1882 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1883 | inc_nlink(inode); |
1da177e4 | 1884 | d_add(dentry, inode); |
edb20fb5 | 1885 | /* bump link count on parent directory, too */ |
ce0b16dd | 1886 | inc_nlink(d_inode(dir)); |
b77a493b | 1887 | |
a1c2aa1e | 1888 | return dentry; |
1da177e4 LT |
1889 | } |
1890 | ||
0619f0f5 SS |
1891 | #define NULL_FILE_NAME "null" |
1892 | ||
1872981b | 1893 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 | 1894 | { |
0619f0f5 | 1895 | struct selinux_fs_info *fsi; |
1da177e4 LT |
1896 | int ret; |
1897 | struct dentry *dentry; | |
a1c2aa1e | 1898 | struct inode *inode; |
1da177e4 LT |
1899 | struct inode_security_struct *isec; |
1900 | ||
cda37124 | 1901 | static const struct tree_descr selinux_files[] = { |
1da177e4 LT |
1902 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, |
1903 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1904 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1905 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1906 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1907 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1908 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1909 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1910 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1911 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1912 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1913 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1914 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
3f12070e EP |
1915 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1916 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
11904167 | 1917 | [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, |
72e8c859 | 1918 | [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, |
f9df6458 AP |
1919 | [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, |
1920 | S_IWUGO}, | |
1da177e4 LT |
1921 | /* last one */ {""} |
1922 | }; | |
0619f0f5 SS |
1923 | |
1924 | ret = selinux_fs_info_create(sb); | |
1925 | if (ret) | |
1926 | goto err; | |
1927 | ||
1da177e4 LT |
1928 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); |
1929 | if (ret) | |
161ce45a | 1930 | goto err; |
1da177e4 | 1931 | |
0619f0f5 SS |
1932 | fsi = sb->s_fs_info; |
1933 | fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); | |
1934 | if (IS_ERR(fsi->bool_dir)) { | |
1935 | ret = PTR_ERR(fsi->bool_dir); | |
1936 | fsi->bool_dir = NULL; | |
161ce45a | 1937 | goto err; |
a1c2aa1e | 1938 | } |
1da177e4 | 1939 | |
b77a493b | 1940 | ret = -ENOMEM; |
1da177e4 | 1941 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); |
b77a493b | 1942 | if (!dentry) |
161ce45a | 1943 | goto err; |
1da177e4 | 1944 | |
b77a493b | 1945 | ret = -ENOMEM; |
1da177e4 | 1946 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); |
b77a493b | 1947 | if (!inode) |
161ce45a | 1948 | goto err; |
b77a493b | 1949 | |
0619f0f5 | 1950 | inode->i_ino = ++fsi->last_ino; |
1872981b | 1951 | isec = (struct inode_security_struct *)inode->i_security; |
1da177e4 LT |
1952 | isec->sid = SECINITSID_DEVNULL; |
1953 | isec->sclass = SECCLASS_CHR_FILE; | |
42059112 | 1954 | isec->initialized = LABEL_INITIALIZED; |
1da177e4 LT |
1955 | |
1956 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1957 | d_add(dentry, inode); | |
1da177e4 | 1958 | |
0619f0f5 | 1959 | dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); |
a1c2aa1e AV |
1960 | if (IS_ERR(dentry)) { |
1961 | ret = PTR_ERR(dentry); | |
161ce45a | 1962 | goto err; |
a1c2aa1e | 1963 | } |
1da177e4 LT |
1964 | |
1965 | ret = sel_make_avc_files(dentry); | |
1966 | if (ret) | |
161ce45a | 1967 | goto err; |
f0ee2e46 | 1968 | |
0619f0f5 | 1969 | dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); |
a1c2aa1e AV |
1970 | if (IS_ERR(dentry)) { |
1971 | ret = PTR_ERR(dentry); | |
f0ee2e46 | 1972 | goto err; |
a1c2aa1e | 1973 | } |
f0ee2e46 JC |
1974 | |
1975 | ret = sel_make_initcon_files(dentry); | |
1976 | if (ret) | |
1977 | goto err; | |
1978 | ||
0619f0f5 SS |
1979 | fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); |
1980 | if (IS_ERR(fsi->class_dir)) { | |
1981 | ret = PTR_ERR(fsi->class_dir); | |
1982 | fsi->class_dir = NULL; | |
3bb56b25 | 1983 | goto err; |
a1c2aa1e | 1984 | } |
3bb56b25 | 1985 | |
0619f0f5 SS |
1986 | fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", |
1987 | &fsi->last_ino); | |
1988 | if (IS_ERR(fsi->policycap_dir)) { | |
1989 | ret = PTR_ERR(fsi->policycap_dir); | |
1990 | fsi->policycap_dir = NULL; | |
3bb56b25 | 1991 | goto err; |
a1c2aa1e | 1992 | } |
0619f0f5 SS |
1993 | |
1994 | ret = sel_make_policy_nodes(fsi); | |
1995 | if (ret) | |
1996 | goto err; | |
b77a493b | 1997 | return 0; |
161ce45a | 1998 | err: |
744ba35e EP |
1999 | printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", |
2000 | __func__); | |
0619f0f5 SS |
2001 | |
2002 | selinux_fs_info_free(sb); | |
2003 | ||
b77a493b | 2004 | return ret; |
1da177e4 LT |
2005 | } |
2006 | ||
fc14f2fe AV |
2007 | static struct dentry *sel_mount(struct file_system_type *fs_type, |
2008 | int flags, const char *dev_name, void *data) | |
1da177e4 | 2009 | { |
fc14f2fe | 2010 | return mount_single(fs_type, flags, data, sel_fill_super); |
1da177e4 LT |
2011 | } |
2012 | ||
0619f0f5 SS |
2013 | static void sel_kill_sb(struct super_block *sb) |
2014 | { | |
2015 | selinux_fs_info_free(sb); | |
2016 | kill_litter_super(sb); | |
2017 | } | |
2018 | ||
1da177e4 LT |
2019 | static struct file_system_type sel_fs_type = { |
2020 | .name = "selinuxfs", | |
fc14f2fe | 2021 | .mount = sel_mount, |
0619f0f5 | 2022 | .kill_sb = sel_kill_sb, |
1da177e4 LT |
2023 | }; |
2024 | ||
2025 | struct vfsmount *selinuxfs_mount; | |
0619f0f5 | 2026 | struct path selinux_null; |
1da177e4 LT |
2027 | |
2028 | static int __init init_sel_fs(void) | |
2029 | { | |
0619f0f5 SS |
2030 | struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, |
2031 | sizeof(NULL_FILE_NAME)-1); | |
1da177e4 LT |
2032 | int err; |
2033 | ||
2034 | if (!selinux_enabled) | |
2035 | return 0; | |
7a627e3b | 2036 | |
f9bb4882 EB |
2037 | err = sysfs_create_mount_point(fs_kobj, "selinux"); |
2038 | if (err) | |
2039 | return err; | |
7a627e3b | 2040 | |
1da177e4 | 2041 | err = register_filesystem(&sel_fs_type); |
7a627e3b | 2042 | if (err) { |
f9bb4882 | 2043 | sysfs_remove_mount_point(fs_kobj, "selinux"); |
b77a493b | 2044 | return err; |
7a627e3b | 2045 | } |
b77a493b | 2046 | |
765927b2 | 2047 | selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); |
b77a493b EP |
2048 | if (IS_ERR(selinuxfs_mount)) { |
2049 | printk(KERN_ERR "selinuxfs: could not mount!\n"); | |
2050 | err = PTR_ERR(selinuxfs_mount); | |
2051 | selinuxfs_mount = NULL; | |
1da177e4 | 2052 | } |
0619f0f5 SS |
2053 | selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, |
2054 | &null_name); | |
2055 | if (IS_ERR(selinux_null.dentry)) { | |
2056 | pr_err("selinuxfs: could not lookup null!\n"); | |
2057 | err = PTR_ERR(selinux_null.dentry); | |
2058 | selinux_null.dentry = NULL; | |
2059 | } | |
b77a493b | 2060 | |
1da177e4 LT |
2061 | return err; |
2062 | } | |
2063 | ||
2064 | __initcall(init_sel_fs); | |
2065 | ||
2066 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
2067 | void exit_sel_fs(void) | |
2068 | { | |
f9bb4882 | 2069 | sysfs_remove_mount_point(fs_kobj, "selinux"); |
fd40ffc7 | 2070 | dput(selinux_null.dentry); |
423e0ab0 | 2071 | kern_unmount(selinuxfs_mount); |
1da177e4 LT |
2072 | unregister_filesystem(&sel_fs_type); |
2073 | } | |
2074 | #endif |