Commit | Line | Data |
---|---|---|
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 | { | |
444 | struct policy_load_memory *plm = filp->private_data; | |
445 | int ret; | |
446 | ||
6b6bc620 SS |
447 | ret = avc_has_perm(&selinux_state, |
448 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 449 | SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); |
cee74f47 | 450 | if (ret) |
0da74120 | 451 | return ret; |
cee74f47 | 452 | |
0da74120 | 453 | return simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); |
cee74f47 EP |
454 | } |
455 | ||
ac9a1f6d | 456 | static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf) |
845ca30f | 457 | { |
11bac800 | 458 | struct policy_load_memory *plm = vmf->vma->vm_file->private_data; |
845ca30f EP |
459 | unsigned long offset; |
460 | struct page *page; | |
461 | ||
462 | if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) | |
463 | return VM_FAULT_SIGBUS; | |
464 | ||
465 | offset = vmf->pgoff << PAGE_SHIFT; | |
466 | if (offset >= roundup(plm->len, PAGE_SIZE)) | |
467 | return VM_FAULT_SIGBUS; | |
468 | ||
469 | page = vmalloc_to_page(plm->data + offset); | |
470 | get_page(page); | |
471 | ||
472 | vmf->page = page; | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
7cbea8dc | 477 | static const struct vm_operations_struct sel_mmap_policy_ops = { |
845ca30f EP |
478 | .fault = sel_mmap_policy_fault, |
479 | .page_mkwrite = sel_mmap_policy_fault, | |
480 | }; | |
481 | ||
ad3fa08c | 482 | static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) |
845ca30f EP |
483 | { |
484 | if (vma->vm_flags & VM_SHARED) { | |
485 | /* do not allow mprotect to make mapping writable */ | |
486 | vma->vm_flags &= ~VM_MAYWRITE; | |
487 | ||
488 | if (vma->vm_flags & VM_WRITE) | |
489 | return -EACCES; | |
490 | } | |
491 | ||
314e51b9 | 492 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
845ca30f EP |
493 | vma->vm_ops = &sel_mmap_policy_ops; |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
cee74f47 EP |
498 | static const struct file_operations sel_policy_ops = { |
499 | .open = sel_open_policy, | |
500 | .read = sel_read_policy, | |
845ca30f | 501 | .mmap = sel_mmap_policy, |
cee74f47 | 502 | .release = sel_release_policy, |
47a93a5b | 503 | .llseek = generic_file_llseek, |
cee74f47 EP |
504 | }; |
505 | ||
0619f0f5 SS |
506 | static int sel_make_policy_nodes(struct selinux_fs_info *fsi) |
507 | { | |
508 | int ret; | |
509 | ||
510 | ret = sel_make_bools(fsi); | |
511 | if (ret) { | |
512 | pr_err("SELinux: failed to load policy booleans\n"); | |
513 | return ret; | |
514 | } | |
515 | ||
516 | ret = sel_make_classes(fsi); | |
517 | if (ret) { | |
518 | pr_err("SELinux: failed to load policy classes\n"); | |
519 | return ret; | |
520 | } | |
521 | ||
522 | ret = sel_make_policycap(fsi); | |
523 | if (ret) { | |
524 | pr_err("SELinux: failed to load policy capabilities\n"); | |
525 | return ret; | |
526 | } | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
1872981b | 531 | static ssize_t sel_write_load(struct file *file, const char __user *buf, |
1da177e4 LT |
532 | size_t count, loff_t *ppos) |
533 | ||
534 | { | |
0619f0f5 | 535 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1da177e4 LT |
536 | ssize_t length; |
537 | void *data = NULL; | |
538 | ||
0619f0f5 | 539 | mutex_lock(&fsi->mutex); |
1da177e4 | 540 | |
6b6bc620 SS |
541 | length = avc_has_perm(&selinux_state, |
542 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 543 | SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); |
1da177e4 LT |
544 | if (length) |
545 | goto out; | |
546 | ||
b77a493b EP |
547 | /* No partial writes. */ |
548 | length = -EINVAL; | |
549 | if (*ppos != 0) | |
1da177e4 | 550 | goto out; |
1da177e4 | 551 | |
b77a493b EP |
552 | length = -EFBIG; |
553 | if (count > 64 * 1024 * 1024) | |
554 | goto out; | |
555 | ||
556 | length = -ENOMEM; | |
557 | data = vmalloc(count); | |
558 | if (!data) | |
1da177e4 | 559 | goto out; |
1da177e4 LT |
560 | |
561 | length = -EFAULT; | |
562 | if (copy_from_user(data, buf, count) != 0) | |
563 | goto out; | |
564 | ||
0619f0f5 | 565 | length = security_load_policy(fsi->state, data, count); |
4262fb51 GT |
566 | if (length) { |
567 | pr_warn_ratelimited("SELinux: failed to load policy\n"); | |
1da177e4 | 568 | goto out; |
4262fb51 | 569 | } |
1da177e4 | 570 | |
0619f0f5 SS |
571 | length = sel_make_policy_nodes(fsi); |
572 | if (length) | |
b77a493b EP |
573 | goto out1; |
574 | ||
575 | length = count; | |
e47c8fc5 CP |
576 | |
577 | out1: | |
cdfb6b34 | 578 | audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, |
d141136f | 579 | "auid=%u ses=%u lsm=selinux res=1", |
581abc09 | 580 | from_kuid(&init_user_ns, audit_get_loginuid(current)), |
4746ec5b | 581 | audit_get_sessionid(current)); |
1da177e4 | 582 | out: |
0619f0f5 | 583 | mutex_unlock(&fsi->mutex); |
1da177e4 LT |
584 | vfree(data); |
585 | return length; | |
586 | } | |
587 | ||
9c2e08c5 | 588 | static const struct file_operations sel_load_ops = { |
1da177e4 | 589 | .write = sel_write_load, |
57a62c23 | 590 | .llseek = generic_file_llseek, |
1da177e4 LT |
591 | }; |
592 | ||
1872981b | 593 | static ssize_t sel_write_context(struct file *file, char *buf, size_t size) |
1da177e4 | 594 | { |
0619f0f5 SS |
595 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
596 | struct selinux_state *state = fsi->state; | |
b77a493b | 597 | char *canon = NULL; |
ce9982d0 | 598 | u32 sid, len; |
1da177e4 LT |
599 | ssize_t length; |
600 | ||
6b6bc620 SS |
601 | length = avc_has_perm(&selinux_state, |
602 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 603 | SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); |
1da177e4 | 604 | if (length) |
b77a493b | 605 | goto out; |
1da177e4 | 606 | |
0619f0f5 | 607 | length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); |
b77a493b EP |
608 | if (length) |
609 | goto out; | |
1da177e4 | 610 | |
0619f0f5 | 611 | length = security_sid_to_context(state, sid, &canon, &len); |
b77a493b EP |
612 | if (length) |
613 | goto out; | |
ce9982d0 | 614 | |
b77a493b | 615 | length = -ERANGE; |
ce9982d0 | 616 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
f8b69a5f | 617 | pr_err("SELinux: %s: context size (%u) exceeds " |
744ba35e | 618 | "payload max\n", __func__, len); |
1da177e4 | 619 | goto out; |
ce9982d0 | 620 | } |
1da177e4 | 621 | |
ce9982d0 SS |
622 | memcpy(buf, canon, len); |
623 | length = len; | |
1da177e4 | 624 | out: |
ce9982d0 | 625 | kfree(canon); |
1da177e4 LT |
626 | return length; |
627 | } | |
628 | ||
1da177e4 LT |
629 | static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, |
630 | size_t count, loff_t *ppos) | |
631 | { | |
0619f0f5 | 632 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1da177e4 LT |
633 | char tmpbuf[TMPBUFLEN]; |
634 | ssize_t length; | |
635 | ||
0619f0f5 | 636 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); |
1da177e4 LT |
637 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
638 | } | |
639 | ||
1872981b | 640 | static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, |
1da177e4 LT |
641 | size_t count, loff_t *ppos) |
642 | { | |
0619f0f5 | 643 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
8365a719 | 644 | char *page; |
1da177e4 LT |
645 | ssize_t length; |
646 | unsigned int new_value; | |
647 | ||
6b6bc620 SS |
648 | length = avc_has_perm(&selinux_state, |
649 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
650 | SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, |
651 | NULL); | |
1da177e4 | 652 | if (length) |
8365a719 | 653 | return length; |
1da177e4 | 654 | |
bfd51626 | 655 | if (count >= PAGE_SIZE) |
8365a719 | 656 | return -ENOMEM; |
b77a493b EP |
657 | |
658 | /* No partial writes. */ | |
b77a493b | 659 | if (*ppos != 0) |
8365a719 | 660 | return -EINVAL; |
b77a493b | 661 | |
8365a719 AV |
662 | page = memdup_user_nul(buf, count); |
663 | if (IS_ERR(page)) | |
664 | return PTR_ERR(page); | |
1da177e4 LT |
665 | |
666 | length = -EINVAL; | |
667 | if (sscanf(page, "%u", &new_value) != 1) | |
668 | goto out; | |
669 | ||
0619f0f5 | 670 | fsi->state->checkreqprot = new_value ? 1 : 0; |
1da177e4 LT |
671 | length = count; |
672 | out: | |
8365a719 | 673 | kfree(page); |
1da177e4 LT |
674 | return length; |
675 | } | |
9c2e08c5 | 676 | static const struct file_operations sel_checkreqprot_ops = { |
1da177e4 LT |
677 | .read = sel_read_checkreqprot, |
678 | .write = sel_write_checkreqprot, | |
57a62c23 | 679 | .llseek = generic_file_llseek, |
1da177e4 LT |
680 | }; |
681 | ||
f9df6458 AP |
682 | static ssize_t sel_write_validatetrans(struct file *file, |
683 | const char __user *buf, | |
684 | size_t count, loff_t *ppos) | |
685 | { | |
0619f0f5 SS |
686 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
687 | struct selinux_state *state = fsi->state; | |
f9df6458 AP |
688 | char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; |
689 | char *req = NULL; | |
690 | u32 osid, nsid, tsid; | |
691 | u16 tclass; | |
692 | int rc; | |
693 | ||
6b6bc620 SS |
694 | rc = avc_has_perm(&selinux_state, |
695 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 696 | SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); |
f9df6458 AP |
697 | if (rc) |
698 | goto out; | |
699 | ||
700 | rc = -ENOMEM; | |
701 | if (count >= PAGE_SIZE) | |
702 | goto out; | |
703 | ||
704 | /* No partial writes. */ | |
705 | rc = -EINVAL; | |
706 | if (*ppos != 0) | |
707 | goto out; | |
708 | ||
0b884d25 AV |
709 | req = memdup_user_nul(buf, count); |
710 | if (IS_ERR(req)) { | |
711 | rc = PTR_ERR(req); | |
712 | req = NULL; | |
f9df6458 | 713 | goto out; |
0b884d25 | 714 | } |
f9df6458 AP |
715 | |
716 | rc = -ENOMEM; | |
717 | oldcon = kzalloc(count + 1, GFP_KERNEL); | |
718 | if (!oldcon) | |
719 | goto out; | |
720 | ||
721 | newcon = kzalloc(count + 1, GFP_KERNEL); | |
722 | if (!newcon) | |
723 | goto out; | |
724 | ||
725 | taskcon = kzalloc(count + 1, GFP_KERNEL); | |
726 | if (!taskcon) | |
727 | goto out; | |
728 | ||
729 | rc = -EINVAL; | |
730 | if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) | |
731 | goto out; | |
732 | ||
0619f0f5 | 733 | rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); |
f9df6458 AP |
734 | if (rc) |
735 | goto out; | |
736 | ||
0619f0f5 | 737 | rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); |
f9df6458 AP |
738 | if (rc) |
739 | goto out; | |
740 | ||
0619f0f5 | 741 | rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); |
f9df6458 AP |
742 | if (rc) |
743 | goto out; | |
744 | ||
0619f0f5 | 745 | rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); |
f9df6458 AP |
746 | if (!rc) |
747 | rc = count; | |
748 | out: | |
749 | kfree(req); | |
750 | kfree(oldcon); | |
751 | kfree(newcon); | |
752 | kfree(taskcon); | |
753 | return rc; | |
754 | } | |
755 | ||
756 | static const struct file_operations sel_transition_ops = { | |
757 | .write = sel_write_validatetrans, | |
758 | .llseek = generic_file_llseek, | |
759 | }; | |
760 | ||
1da177e4 LT |
761 | /* |
762 | * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c | |
763 | */ | |
1872981b EP |
764 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size); |
765 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size); | |
766 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); | |
767 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size); | |
768 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size); | |
1da177e4 | 769 | |
631d2b49 | 770 | static ssize_t (*const write_op[])(struct file *, char *, size_t) = { |
1da177e4 LT |
771 | [SEL_ACCESS] = sel_write_access, |
772 | [SEL_CREATE] = sel_write_create, | |
773 | [SEL_RELABEL] = sel_write_relabel, | |
774 | [SEL_USER] = sel_write_user, | |
775 | [SEL_MEMBER] = sel_write_member, | |
ce9982d0 | 776 | [SEL_CONTEXT] = sel_write_context, |
1da177e4 LT |
777 | }; |
778 | ||
779 | static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) | |
780 | { | |
496ad9aa | 781 | ino_t ino = file_inode(file)->i_ino; |
1da177e4 LT |
782 | char *data; |
783 | ssize_t rv; | |
784 | ||
6e20a64a | 785 | if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) |
1da177e4 LT |
786 | return -EINVAL; |
787 | ||
788 | data = simple_transaction_get(file, buf, size); | |
789 | if (IS_ERR(data)) | |
790 | return PTR_ERR(data); | |
791 | ||
1872981b EP |
792 | rv = write_op[ino](file, data, size); |
793 | if (rv > 0) { | |
1da177e4 LT |
794 | simple_transaction_set(file, rv); |
795 | rv = size; | |
796 | } | |
797 | return rv; | |
798 | } | |
799 | ||
9c2e08c5 | 800 | static const struct file_operations transaction_ops = { |
1da177e4 LT |
801 | .write = selinux_transaction_write, |
802 | .read = simple_transaction_read, | |
803 | .release = simple_transaction_release, | |
57a62c23 | 804 | .llseek = generic_file_llseek, |
1da177e4 LT |
805 | }; |
806 | ||
807 | /* | |
808 | * payload - write methods | |
809 | * If the method has a response, the response should be put in buf, | |
810 | * and the length returned. Otherwise return 0 or and -error. | |
811 | */ | |
812 | ||
1872981b | 813 | static ssize_t sel_write_access(struct file *file, char *buf, size_t size) |
1da177e4 | 814 | { |
0619f0f5 SS |
815 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
816 | struct selinux_state *state = fsi->state; | |
b77a493b | 817 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
818 | u32 ssid, tsid; |
819 | u16 tclass; | |
1da177e4 LT |
820 | struct av_decision avd; |
821 | ssize_t length; | |
822 | ||
6b6bc620 SS |
823 | length = avc_has_perm(&selinux_state, |
824 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 | 825 | SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); |
1da177e4 | 826 | if (length) |
b77a493b | 827 | goto out; |
1da177e4 LT |
828 | |
829 | length = -ENOMEM; | |
c1a7368a | 830 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 831 | if (!scon) |
b77a493b | 832 | goto out; |
1da177e4 | 833 | |
b77a493b | 834 | length = -ENOMEM; |
c1a7368a | 835 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
836 | if (!tcon) |
837 | goto out; | |
1da177e4 LT |
838 | |
839 | length = -EINVAL; | |
19439d05 | 840 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) |
b77a493b | 841 | goto out; |
1da177e4 | 842 | |
0619f0f5 | 843 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
844 | if (length) |
845 | goto out; | |
846 | ||
0619f0f5 | 847 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
848 | if (length) |
849 | goto out; | |
1da177e4 | 850 | |
0619f0f5 | 851 | security_compute_av_user(state, ssid, tsid, tclass, &avd); |
1da177e4 LT |
852 | |
853 | length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, | |
8a6f83af | 854 | "%x %x %x %x %u %x", |
f1c6381a | 855 | avd.allowed, 0xffffffff, |
1da177e4 | 856 | avd.auditallow, avd.auditdeny, |
8a6f83af | 857 | avd.seqno, avd.flags); |
1da177e4 | 858 | out: |
b77a493b | 859 | kfree(tcon); |
1da177e4 LT |
860 | kfree(scon); |
861 | return length; | |
862 | } | |
863 | ||
1872981b | 864 | static ssize_t sel_write_create(struct file *file, char *buf, size_t size) |
1da177e4 | 865 | { |
0619f0f5 SS |
866 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
867 | struct selinux_state *state = fsi->state; | |
b77a493b | 868 | char *scon = NULL, *tcon = NULL; |
f50a3ec9 | 869 | char *namebuf = NULL, *objname = NULL; |
1da177e4 LT |
870 | u32 ssid, tsid, newsid; |
871 | u16 tclass; | |
872 | ssize_t length; | |
b77a493b | 873 | char *newcon = NULL; |
1da177e4 | 874 | u32 len; |
f50a3ec9 | 875 | int nargs; |
1da177e4 | 876 | |
6b6bc620 SS |
877 | length = avc_has_perm(&selinux_state, |
878 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
879 | SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, |
880 | NULL); | |
1da177e4 | 881 | if (length) |
b77a493b | 882 | goto out; |
1da177e4 LT |
883 | |
884 | length = -ENOMEM; | |
c1a7368a | 885 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 886 | if (!scon) |
b77a493b | 887 | goto out; |
1da177e4 | 888 | |
b77a493b | 889 | length = -ENOMEM; |
c1a7368a | 890 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
891 | if (!tcon) |
892 | goto out; | |
1da177e4 | 893 | |
f50a3ec9 KK |
894 | length = -ENOMEM; |
895 | namebuf = kzalloc(size + 1, GFP_KERNEL); | |
896 | if (!namebuf) | |
897 | goto out; | |
898 | ||
1da177e4 | 899 | length = -EINVAL; |
f50a3ec9 KK |
900 | nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); |
901 | if (nargs < 3 || nargs > 4) | |
b77a493b | 902 | goto out; |
0f7e4c33 KK |
903 | if (nargs == 4) { |
904 | /* | |
905 | * If and when the name of new object to be queried contains | |
906 | * either whitespace or multibyte characters, they shall be | |
907 | * encoded based on the percentage-encoding rule. | |
908 | * If not encoded, the sscanf logic picks up only left-half | |
909 | * of the supplied name; splitted by a whitespace unexpectedly. | |
910 | */ | |
911 | char *r, *w; | |
912 | int c1, c2; | |
913 | ||
914 | r = w = namebuf; | |
915 | do { | |
916 | c1 = *r++; | |
917 | if (c1 == '+') | |
918 | c1 = ' '; | |
919 | else if (c1 == '%') { | |
af7ff2c2 AS |
920 | c1 = hex_to_bin(*r++); |
921 | if (c1 < 0) | |
0f7e4c33 | 922 | goto out; |
af7ff2c2 AS |
923 | c2 = hex_to_bin(*r++); |
924 | if (c2 < 0) | |
0f7e4c33 KK |
925 | goto out; |
926 | c1 = (c1 << 4) | c2; | |
927 | } | |
928 | *w++ = c1; | |
929 | } while (c1 != '\0'); | |
930 | ||
f50a3ec9 | 931 | objname = namebuf; |
0f7e4c33 | 932 | } |
1da177e4 | 933 | |
0619f0f5 | 934 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
935 | if (length) |
936 | goto out; | |
937 | ||
0619f0f5 | 938 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
939 | if (length) |
940 | goto out; | |
1da177e4 | 941 | |
0619f0f5 SS |
942 | length = security_transition_sid_user(state, ssid, tsid, tclass, |
943 | objname, &newsid); | |
b77a493b EP |
944 | if (length) |
945 | goto out; | |
1da177e4 | 946 | |
0619f0f5 | 947 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
948 | if (length) |
949 | goto out; | |
1da177e4 | 950 | |
b77a493b | 951 | length = -ERANGE; |
1da177e4 | 952 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
f8b69a5f | 953 | pr_err("SELinux: %s: context size (%u) exceeds " |
744ba35e | 954 | "payload max\n", __func__, len); |
b77a493b | 955 | goto out; |
1da177e4 LT |
956 | } |
957 | ||
958 | memcpy(buf, newcon, len); | |
959 | length = len; | |
b77a493b | 960 | out: |
1da177e4 | 961 | kfree(newcon); |
f50a3ec9 | 962 | kfree(namebuf); |
1da177e4 | 963 | kfree(tcon); |
1da177e4 LT |
964 | kfree(scon); |
965 | return length; | |
966 | } | |
967 | ||
1872981b | 968 | static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) |
1da177e4 | 969 | { |
0619f0f5 SS |
970 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
971 | struct selinux_state *state = fsi->state; | |
b77a493b | 972 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
973 | u32 ssid, tsid, newsid; |
974 | u16 tclass; | |
975 | ssize_t length; | |
b77a493b | 976 | char *newcon = NULL; |
1da177e4 LT |
977 | u32 len; |
978 | ||
6b6bc620 SS |
979 | length = avc_has_perm(&selinux_state, |
980 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
981 | SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, |
982 | NULL); | |
1da177e4 | 983 | if (length) |
b77a493b | 984 | goto out; |
1da177e4 LT |
985 | |
986 | length = -ENOMEM; | |
c1a7368a | 987 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 988 | if (!scon) |
b77a493b | 989 | goto out; |
1da177e4 | 990 | |
b77a493b | 991 | length = -ENOMEM; |
c1a7368a | 992 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
993 | if (!tcon) |
994 | goto out; | |
1da177e4 LT |
995 | |
996 | length = -EINVAL; | |
997 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
b77a493b | 998 | goto out; |
1da177e4 | 999 | |
0619f0f5 | 1000 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
1001 | if (length) |
1002 | goto out; | |
1003 | ||
0619f0f5 | 1004 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
1005 | if (length) |
1006 | goto out; | |
1da177e4 | 1007 | |
0619f0f5 | 1008 | length = security_change_sid(state, ssid, tsid, tclass, &newsid); |
b77a493b EP |
1009 | if (length) |
1010 | goto out; | |
1da177e4 | 1011 | |
0619f0f5 | 1012 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
1013 | if (length) |
1014 | goto out; | |
1da177e4 | 1015 | |
b77a493b EP |
1016 | length = -ERANGE; |
1017 | if (len > SIMPLE_TRANSACTION_LIMIT) | |
1018 | goto out; | |
1da177e4 LT |
1019 | |
1020 | memcpy(buf, newcon, len); | |
1021 | length = len; | |
b77a493b | 1022 | out: |
1da177e4 | 1023 | kfree(newcon); |
1da177e4 | 1024 | kfree(tcon); |
1da177e4 LT |
1025 | kfree(scon); |
1026 | return length; | |
1027 | } | |
1028 | ||
1872981b | 1029 | static ssize_t sel_write_user(struct file *file, char *buf, size_t size) |
1da177e4 | 1030 | { |
0619f0f5 SS |
1031 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1032 | struct selinux_state *state = fsi->state; | |
b77a493b EP |
1033 | char *con = NULL, *user = NULL, *ptr; |
1034 | u32 sid, *sids = NULL; | |
1da177e4 LT |
1035 | ssize_t length; |
1036 | char *newcon; | |
1037 | int i, rc; | |
1038 | u32 len, nsids; | |
1039 | ||
6b6bc620 SS |
1040 | length = avc_has_perm(&selinux_state, |
1041 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1042 | SECCLASS_SECURITY, SECURITY__COMPUTE_USER, |
1043 | NULL); | |
1da177e4 | 1044 | if (length) |
6eab04a8 | 1045 | goto out; |
1da177e4 LT |
1046 | |
1047 | length = -ENOMEM; | |
c1a7368a | 1048 | con = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 1049 | if (!con) |
6eab04a8 | 1050 | goto out; |
1da177e4 | 1051 | |
b77a493b | 1052 | length = -ENOMEM; |
c1a7368a | 1053 | user = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
1054 | if (!user) |
1055 | goto out; | |
1da177e4 LT |
1056 | |
1057 | length = -EINVAL; | |
1058 | if (sscanf(buf, "%s %s", con, user) != 2) | |
b77a493b | 1059 | goto out; |
1da177e4 | 1060 | |
0619f0f5 | 1061 | length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); |
b77a493b EP |
1062 | if (length) |
1063 | goto out; | |
1da177e4 | 1064 | |
0619f0f5 | 1065 | length = security_get_user_sids(state, sid, user, &sids, &nsids); |
b77a493b EP |
1066 | if (length) |
1067 | goto out; | |
1da177e4 LT |
1068 | |
1069 | length = sprintf(buf, "%u", nsids) + 1; | |
1070 | ptr = buf + length; | |
1071 | for (i = 0; i < nsids; i++) { | |
0619f0f5 | 1072 | rc = security_sid_to_context(state, sids[i], &newcon, &len); |
1da177e4 LT |
1073 | if (rc) { |
1074 | length = rc; | |
b77a493b | 1075 | goto out; |
1da177e4 LT |
1076 | } |
1077 | if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { | |
1078 | kfree(newcon); | |
1079 | length = -ERANGE; | |
b77a493b | 1080 | goto out; |
1da177e4 LT |
1081 | } |
1082 | memcpy(ptr, newcon, len); | |
1083 | kfree(newcon); | |
1084 | ptr += len; | |
1085 | length += len; | |
1086 | } | |
b77a493b | 1087 | out: |
1da177e4 | 1088 | kfree(sids); |
1da177e4 | 1089 | kfree(user); |
1da177e4 LT |
1090 | kfree(con); |
1091 | return length; | |
1092 | } | |
1093 | ||
1872981b | 1094 | static ssize_t sel_write_member(struct file *file, char *buf, size_t size) |
1da177e4 | 1095 | { |
0619f0f5 SS |
1096 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1097 | struct selinux_state *state = fsi->state; | |
b77a493b | 1098 | char *scon = NULL, *tcon = NULL; |
1da177e4 LT |
1099 | u32 ssid, tsid, newsid; |
1100 | u16 tclass; | |
1101 | ssize_t length; | |
b77a493b | 1102 | char *newcon = NULL; |
1da177e4 LT |
1103 | u32 len; |
1104 | ||
6b6bc620 SS |
1105 | length = avc_has_perm(&selinux_state, |
1106 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1107 | SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, |
1108 | NULL); | |
1da177e4 | 1109 | if (length) |
b77a493b | 1110 | goto out; |
1da177e4 LT |
1111 | |
1112 | length = -ENOMEM; | |
c1a7368a | 1113 | scon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 | 1114 | if (!scon) |
6eab04a8 | 1115 | goto out; |
1da177e4 | 1116 | |
b77a493b | 1117 | length = -ENOMEM; |
c1a7368a | 1118 | tcon = kzalloc(size + 1, GFP_KERNEL); |
1da177e4 LT |
1119 | if (!tcon) |
1120 | goto out; | |
1da177e4 LT |
1121 | |
1122 | length = -EINVAL; | |
1123 | if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) | |
b77a493b | 1124 | goto out; |
1da177e4 | 1125 | |
0619f0f5 | 1126 | length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); |
b77a493b EP |
1127 | if (length) |
1128 | goto out; | |
1129 | ||
0619f0f5 | 1130 | length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); |
b77a493b EP |
1131 | if (length) |
1132 | goto out; | |
1da177e4 | 1133 | |
0619f0f5 | 1134 | length = security_member_sid(state, ssid, tsid, tclass, &newsid); |
b77a493b EP |
1135 | if (length) |
1136 | goto out; | |
1da177e4 | 1137 | |
0619f0f5 | 1138 | length = security_sid_to_context(state, newsid, &newcon, &len); |
b77a493b EP |
1139 | if (length) |
1140 | goto out; | |
1da177e4 | 1141 | |
b77a493b | 1142 | length = -ERANGE; |
1da177e4 | 1143 | if (len > SIMPLE_TRANSACTION_LIMIT) { |
f8b69a5f | 1144 | pr_err("SELinux: %s: context size (%u) exceeds " |
744ba35e | 1145 | "payload max\n", __func__, len); |
b77a493b | 1146 | goto out; |
1da177e4 LT |
1147 | } |
1148 | ||
1149 | memcpy(buf, newcon, len); | |
1150 | length = len; | |
b77a493b | 1151 | out: |
1da177e4 | 1152 | kfree(newcon); |
1da177e4 | 1153 | kfree(tcon); |
1da177e4 LT |
1154 | kfree(scon); |
1155 | return length; | |
1156 | } | |
1157 | ||
1158 | static struct inode *sel_make_inode(struct super_block *sb, int mode) | |
1159 | { | |
1160 | struct inode *ret = new_inode(sb); | |
1161 | ||
1162 | if (ret) { | |
1163 | ret->i_mode = mode; | |
078cd827 | 1164 | ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); |
1da177e4 LT |
1165 | } |
1166 | return ret; | |
1167 | } | |
1168 | ||
1da177e4 LT |
1169 | static ssize_t sel_read_bool(struct file *filep, char __user *buf, |
1170 | size_t count, loff_t *ppos) | |
1171 | { | |
0619f0f5 | 1172 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 LT |
1173 | char *page = NULL; |
1174 | ssize_t length; | |
1da177e4 LT |
1175 | ssize_t ret; |
1176 | int cur_enforcing; | |
496ad9aa | 1177 | unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; |
d313f948 | 1178 | const char *name = filep->f_path.dentry->d_name.name; |
1da177e4 | 1179 | |
0619f0f5 | 1180 | mutex_lock(&fsi->mutex); |
1da177e4 | 1181 | |
b77a493b | 1182 | ret = -EINVAL; |
0619f0f5 SS |
1183 | if (index >= fsi->bool_num || strcmp(name, |
1184 | fsi->bool_pending_names[index])) | |
0da74120 | 1185 | goto out_unlock; |
1da177e4 | 1186 | |
b77a493b | 1187 | ret = -ENOMEM; |
1872981b | 1188 | page = (char *)get_zeroed_page(GFP_KERNEL); |
b77a493b | 1189 | if (!page) |
0da74120 | 1190 | goto out_unlock; |
1da177e4 | 1191 | |
0619f0f5 | 1192 | cur_enforcing = security_get_bool_value(fsi->state, index); |
1da177e4 LT |
1193 | if (cur_enforcing < 0) { |
1194 | ret = cur_enforcing; | |
0da74120 | 1195 | goto out_unlock; |
1da177e4 | 1196 | } |
1da177e4 | 1197 | length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, |
0619f0f5 | 1198 | fsi->bool_pending_values[index]); |
0619f0f5 | 1199 | mutex_unlock(&fsi->mutex); |
0da74120 JH |
1200 | ret = simple_read_from_buffer(buf, count, ppos, page, length); |
1201 | out_free: | |
b77a493b | 1202 | free_page((unsigned long)page); |
1da177e4 | 1203 | return ret; |
0da74120 JH |
1204 | |
1205 | out_unlock: | |
1206 | mutex_unlock(&fsi->mutex); | |
1207 | goto out_free; | |
1da177e4 LT |
1208 | } |
1209 | ||
1210 | static ssize_t sel_write_bool(struct file *filep, const char __user *buf, | |
1211 | size_t count, loff_t *ppos) | |
1212 | { | |
0619f0f5 | 1213 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 | 1214 | char *page = NULL; |
d313f948 | 1215 | ssize_t length; |
1da177e4 | 1216 | int new_value; |
496ad9aa | 1217 | unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; |
d313f948 | 1218 | const char *name = filep->f_path.dentry->d_name.name; |
1da177e4 | 1219 | |
0da74120 JH |
1220 | if (count >= PAGE_SIZE) |
1221 | return -ENOMEM; | |
1222 | ||
1223 | /* No partial writes. */ | |
1224 | if (*ppos != 0) | |
1225 | return -EINVAL; | |
1226 | ||
1227 | page = memdup_user_nul(buf, count); | |
1228 | if (IS_ERR(page)) | |
1229 | return PTR_ERR(page); | |
1230 | ||
0619f0f5 | 1231 | mutex_lock(&fsi->mutex); |
1da177e4 | 1232 | |
6b6bc620 SS |
1233 | length = avc_has_perm(&selinux_state, |
1234 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1235 | SECCLASS_SECURITY, SECURITY__SETBOOL, |
1236 | NULL); | |
1da177e4 LT |
1237 | if (length) |
1238 | goto out; | |
1239 | ||
b77a493b | 1240 | length = -EINVAL; |
0619f0f5 SS |
1241 | if (index >= fsi->bool_num || strcmp(name, |
1242 | fsi->bool_pending_names[index])) | |
d313f948 | 1243 | goto out; |
d313f948 | 1244 | |
1da177e4 LT |
1245 | length = -EINVAL; |
1246 | if (sscanf(page, "%d", &new_value) != 1) | |
1247 | goto out; | |
1248 | ||
1249 | if (new_value) | |
1250 | new_value = 1; | |
1251 | ||
0619f0f5 | 1252 | fsi->bool_pending_values[index] = new_value; |
1da177e4 LT |
1253 | length = count; |
1254 | ||
1255 | out: | |
0619f0f5 | 1256 | mutex_unlock(&fsi->mutex); |
8365a719 | 1257 | kfree(page); |
1da177e4 LT |
1258 | return length; |
1259 | } | |
1260 | ||
9c2e08c5 | 1261 | static const struct file_operations sel_bool_ops = { |
1872981b EP |
1262 | .read = sel_read_bool, |
1263 | .write = sel_write_bool, | |
57a62c23 | 1264 | .llseek = generic_file_llseek, |
1da177e4 LT |
1265 | }; |
1266 | ||
1267 | static ssize_t sel_commit_bools_write(struct file *filep, | |
1268 | const char __user *buf, | |
1269 | size_t count, loff_t *ppos) | |
1270 | { | |
0619f0f5 | 1271 | struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; |
1da177e4 | 1272 | char *page = NULL; |
d313f948 | 1273 | ssize_t length; |
1da177e4 LT |
1274 | int new_value; |
1275 | ||
0da74120 JH |
1276 | if (count >= PAGE_SIZE) |
1277 | return -ENOMEM; | |
1278 | ||
1279 | /* No partial writes. */ | |
1280 | if (*ppos != 0) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | page = memdup_user_nul(buf, count); | |
1284 | if (IS_ERR(page)) | |
1285 | return PTR_ERR(page); | |
1286 | ||
0619f0f5 | 1287 | mutex_lock(&fsi->mutex); |
1da177e4 | 1288 | |
6b6bc620 SS |
1289 | length = avc_has_perm(&selinux_state, |
1290 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1291 | SECCLASS_SECURITY, SECURITY__SETBOOL, |
1292 | NULL); | |
1da177e4 LT |
1293 | if (length) |
1294 | goto out; | |
1295 | ||
1da177e4 LT |
1296 | length = -EINVAL; |
1297 | if (sscanf(page, "%d", &new_value) != 1) | |
1298 | goto out; | |
1299 | ||
b77a493b | 1300 | length = 0; |
0619f0f5 SS |
1301 | if (new_value && fsi->bool_pending_values) |
1302 | length = security_set_bools(fsi->state, fsi->bool_num, | |
1303 | fsi->bool_pending_values); | |
1da177e4 | 1304 | |
b77a493b EP |
1305 | if (!length) |
1306 | length = count; | |
1da177e4 LT |
1307 | |
1308 | out: | |
0619f0f5 | 1309 | mutex_unlock(&fsi->mutex); |
8365a719 | 1310 | kfree(page); |
1da177e4 LT |
1311 | return length; |
1312 | } | |
1313 | ||
9c2e08c5 | 1314 | static const struct file_operations sel_commit_bools_ops = { |
1872981b | 1315 | .write = sel_commit_bools_write, |
57a62c23 | 1316 | .llseek = generic_file_llseek, |
1da177e4 LT |
1317 | }; |
1318 | ||
0c92d7c7 | 1319 | static void sel_remove_entries(struct dentry *de) |
1da177e4 | 1320 | { |
ad52184b AV |
1321 | d_genocide(de); |
1322 | shrink_dcache_parent(de); | |
1da177e4 LT |
1323 | } |
1324 | ||
1325 | #define BOOL_DIR_NAME "booleans" | |
1326 | ||
0619f0f5 | 1327 | static int sel_make_bools(struct selinux_fs_info *fsi) |
1da177e4 | 1328 | { |
b77a493b | 1329 | int i, ret; |
1da177e4 LT |
1330 | ssize_t len; |
1331 | struct dentry *dentry = NULL; | |
0619f0f5 | 1332 | struct dentry *dir = fsi->bool_dir; |
1da177e4 LT |
1333 | struct inode *inode = NULL; |
1334 | struct inode_security_struct *isec; | |
1335 | char **names = NULL, *page; | |
1336 | int num; | |
1337 | int *values = NULL; | |
1338 | u32 sid; | |
1339 | ||
1340 | /* remove any existing files */ | |
0619f0f5 SS |
1341 | for (i = 0; i < fsi->bool_num; i++) |
1342 | kfree(fsi->bool_pending_names[i]); | |
1343 | kfree(fsi->bool_pending_names); | |
1344 | kfree(fsi->bool_pending_values); | |
1345 | fsi->bool_num = 0; | |
1346 | fsi->bool_pending_names = NULL; | |
1347 | fsi->bool_pending_values = NULL; | |
1da177e4 | 1348 | |
0c92d7c7 | 1349 | sel_remove_entries(dir); |
1da177e4 | 1350 | |
b77a493b | 1351 | ret = -ENOMEM; |
1872981b EP |
1352 | page = (char *)get_zeroed_page(GFP_KERNEL); |
1353 | if (!page) | |
b77a493b | 1354 | goto out; |
1da177e4 | 1355 | |
0619f0f5 | 1356 | ret = security_get_bools(fsi->state, &num, &names, &values); |
b77a493b | 1357 | if (ret) |
1da177e4 LT |
1358 | goto out; |
1359 | ||
1360 | for (i = 0; i < num; i++) { | |
b77a493b | 1361 | ret = -ENOMEM; |
1da177e4 | 1362 | dentry = d_alloc_name(dir, names[i]); |
b77a493b EP |
1363 | if (!dentry) |
1364 | goto out; | |
1365 | ||
1366 | ret = -ENOMEM; | |
1da177e4 | 1367 | inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); |
7e4237fa | 1368 | if (!inode) { |
1369 | dput(dentry); | |
b77a493b | 1370 | goto out; |
7e4237fa | 1371 | } |
1da177e4 | 1372 | |
b77a493b | 1373 | ret = -ENAMETOOLONG; |
cc1dad71 | 1374 | len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); |
7e4237fa | 1375 | if (len >= PAGE_SIZE) { |
1376 | dput(dentry); | |
1377 | iput(inode); | |
b77a493b | 1378 | goto out; |
7e4237fa | 1379 | } |
b77a493b | 1380 | |
80788c22 | 1381 | isec = selinux_inode(inode); |
0619f0f5 | 1382 | ret = security_genfs_sid(fsi->state, "selinuxfs", page, |
aa8e712c | 1383 | SECCLASS_FILE, &sid); |
4262fb51 | 1384 | if (ret) { |
900fde06 GT |
1385 | pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", |
1386 | page); | |
1387 | sid = SECINITSID_SECURITY; | |
4262fb51 GT |
1388 | } |
1389 | ||
1da177e4 | 1390 | isec->sid = sid; |
42059112 | 1391 | isec->initialized = LABEL_INITIALIZED; |
1da177e4 | 1392 | inode->i_fop = &sel_bool_ops; |
bce34bc0 | 1393 | inode->i_ino = i|SEL_BOOL_INO_OFFSET; |
1da177e4 LT |
1394 | d_add(dentry, inode); |
1395 | } | |
0619f0f5 SS |
1396 | fsi->bool_num = num; |
1397 | fsi->bool_pending_names = names; | |
1398 | fsi->bool_pending_values = values; | |
b77a493b EP |
1399 | |
1400 | free_page((unsigned long)page); | |
1401 | return 0; | |
1da177e4 LT |
1402 | out: |
1403 | free_page((unsigned long)page); | |
b77a493b | 1404 | |
1da177e4 | 1405 | if (names) { |
9a5f04bf JJ |
1406 | for (i = 0; i < num; i++) |
1407 | kfree(names[i]); | |
1da177e4 LT |
1408 | kfree(names); |
1409 | } | |
20c19e41 | 1410 | kfree(values); |
0c92d7c7 | 1411 | sel_remove_entries(dir); |
b77a493b EP |
1412 | |
1413 | return ret; | |
1da177e4 LT |
1414 | } |
1415 | ||
1da177e4 LT |
1416 | static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, |
1417 | size_t count, loff_t *ppos) | |
1418 | { | |
6b6bc620 SS |
1419 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1420 | struct selinux_state *state = fsi->state; | |
1da177e4 LT |
1421 | char tmpbuf[TMPBUFLEN]; |
1422 | ssize_t length; | |
1423 | ||
6b6bc620 SS |
1424 | length = scnprintf(tmpbuf, TMPBUFLEN, "%u", |
1425 | avc_get_cache_threshold(state->avc)); | |
1da177e4 LT |
1426 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); |
1427 | } | |
1428 | ||
1872981b EP |
1429 | static ssize_t sel_write_avc_cache_threshold(struct file *file, |
1430 | const char __user *buf, | |
1da177e4 LT |
1431 | size_t count, loff_t *ppos) |
1432 | ||
1433 | { | |
6b6bc620 SS |
1434 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
1435 | struct selinux_state *state = fsi->state; | |
8365a719 | 1436 | char *page; |
1da177e4 | 1437 | ssize_t ret; |
309c5fad | 1438 | unsigned int new_value; |
1da177e4 | 1439 | |
6b6bc620 SS |
1440 | ret = avc_has_perm(&selinux_state, |
1441 | current_sid(), SECINITSID_SECURITY, | |
be0554c9 SS |
1442 | SECCLASS_SECURITY, SECURITY__SETSECPARAM, |
1443 | NULL); | |
b77a493b | 1444 | if (ret) |
8365a719 | 1445 | return ret; |
1da177e4 | 1446 | |
b77a493b | 1447 | if (count >= PAGE_SIZE) |
8365a719 | 1448 | return -ENOMEM; |
1da177e4 | 1449 | |
b77a493b | 1450 | /* No partial writes. */ |
b77a493b | 1451 | if (*ppos != 0) |
8365a719 | 1452 | return -EINVAL; |
1da177e4 | 1453 | |
8365a719 AV |
1454 | page = memdup_user_nul(buf, count); |
1455 | if (IS_ERR(page)) | |
1456 | return PTR_ERR(page); | |
1da177e4 | 1457 | |
b77a493b EP |
1458 | ret = -EINVAL; |
1459 | if (sscanf(page, "%u", &new_value) != 1) | |
1da177e4 | 1460 | goto out; |
1da177e4 | 1461 | |
6b6bc620 | 1462 | avc_set_cache_threshold(state->avc, new_value); |
b77a493b | 1463 | |
1da177e4 | 1464 | ret = count; |
1da177e4 | 1465 | out: |
8365a719 | 1466 | kfree(page); |
1da177e4 LT |
1467 | return ret; |
1468 | } | |
1469 | ||
1470 | static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, | |
1471 | size_t count, loff_t *ppos) | |
1472 | { | |
6b6bc620 SS |
1473 | struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; |
1474 | struct selinux_state *state = fsi->state; | |
1da177e4 | 1475 | char *page; |
b77a493b | 1476 | ssize_t length; |
1da177e4 LT |
1477 | |
1478 | page = (char *)__get_free_page(GFP_KERNEL); | |
b77a493b EP |
1479 | if (!page) |
1480 | return -ENOMEM; | |
1481 | ||
6b6bc620 | 1482 | length = avc_get_hash_stats(state->avc, page); |
b77a493b EP |
1483 | if (length >= 0) |
1484 | length = simple_read_from_buffer(buf, count, ppos, page, length); | |
1da177e4 | 1485 | free_page((unsigned long)page); |
b77a493b EP |
1486 | |
1487 | return length; | |
1da177e4 LT |
1488 | } |
1489 | ||
9c2e08c5 | 1490 | static const struct file_operations sel_avc_cache_threshold_ops = { |
1da177e4 LT |
1491 | .read = sel_read_avc_cache_threshold, |
1492 | .write = sel_write_avc_cache_threshold, | |
57a62c23 | 1493 | .llseek = generic_file_llseek, |
1da177e4 LT |
1494 | }; |
1495 | ||
9c2e08c5 | 1496 | static const struct file_operations sel_avc_hash_stats_ops = { |
1da177e4 | 1497 | .read = sel_read_avc_hash_stats, |
57a62c23 | 1498 | .llseek = generic_file_llseek, |
1da177e4 LT |
1499 | }; |
1500 | ||
1501 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1502 | static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) | |
1503 | { | |
1504 | int cpu; | |
1505 | ||
4f4b6c1a | 1506 | for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { |
1da177e4 LT |
1507 | if (!cpu_possible(cpu)) |
1508 | continue; | |
1509 | *idx = cpu + 1; | |
1510 | return &per_cpu(avc_cache_stats, cpu); | |
1511 | } | |
1512 | return NULL; | |
1513 | } | |
1514 | ||
1515 | static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) | |
1516 | { | |
1517 | loff_t n = *pos - 1; | |
1518 | ||
1519 | if (*pos == 0) | |
1520 | return SEQ_START_TOKEN; | |
1521 | ||
1522 | return sel_avc_get_stat_idx(&n); | |
1523 | } | |
1524 | ||
1525 | static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
1526 | { | |
1527 | return sel_avc_get_stat_idx(pos); | |
1528 | } | |
1529 | ||
1530 | static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) | |
1531 | { | |
1532 | struct avc_cache_stats *st = v; | |
1533 | ||
710a0647 ME |
1534 | if (v == SEQ_START_TOKEN) { |
1535 | seq_puts(seq, | |
1536 | "lookups hits misses allocations reclaims frees\n"); | |
1537 | } else { | |
257313b2 LT |
1538 | unsigned int lookups = st->lookups; |
1539 | unsigned int misses = st->misses; | |
1540 | unsigned int hits = lookups - misses; | |
1541 | seq_printf(seq, "%u %u %u %u %u %u\n", lookups, | |
1542 | hits, misses, st->allocations, | |
1da177e4 | 1543 | st->reclaims, st->frees); |
257313b2 | 1544 | } |
1da177e4 LT |
1545 | return 0; |
1546 | } | |
1547 | ||
1548 | static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) | |
1549 | { } | |
1550 | ||
1996a109 | 1551 | static const struct seq_operations sel_avc_cache_stats_seq_ops = { |
1da177e4 LT |
1552 | .start = sel_avc_stats_seq_start, |
1553 | .next = sel_avc_stats_seq_next, | |
1554 | .show = sel_avc_stats_seq_show, | |
1555 | .stop = sel_avc_stats_seq_stop, | |
1556 | }; | |
1557 | ||
1558 | static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) | |
1559 | { | |
1560 | return seq_open(file, &sel_avc_cache_stats_seq_ops); | |
1561 | } | |
1562 | ||
9c2e08c5 | 1563 | static const struct file_operations sel_avc_cache_stats_ops = { |
1da177e4 LT |
1564 | .open = sel_open_avc_cache_stats, |
1565 | .read = seq_read, | |
1566 | .llseek = seq_lseek, | |
1567 | .release = seq_release, | |
1568 | }; | |
1569 | #endif | |
1570 | ||
1571 | static int sel_make_avc_files(struct dentry *dir) | |
1572 | { | |
0619f0f5 SS |
1573 | struct super_block *sb = dir->d_sb; |
1574 | struct selinux_fs_info *fsi = sb->s_fs_info; | |
b77a493b | 1575 | int i; |
cda37124 | 1576 | static const struct tree_descr files[] = { |
1da177e4 LT |
1577 | { "cache_threshold", |
1578 | &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, | |
1579 | { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, | |
1580 | #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS | |
1581 | { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, | |
1582 | #endif | |
1583 | }; | |
1584 | ||
6e20a64a | 1585 | for (i = 0; i < ARRAY_SIZE(files); i++) { |
1da177e4 LT |
1586 | struct inode *inode; |
1587 | struct dentry *dentry; | |
1588 | ||
1589 | dentry = d_alloc_name(dir, files[i].name); | |
b77a493b EP |
1590 | if (!dentry) |
1591 | return -ENOMEM; | |
1da177e4 LT |
1592 | |
1593 | inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); | |
7e4237fa | 1594 | if (!inode) { |
1595 | dput(dentry); | |
b77a493b | 1596 | return -ENOMEM; |
7e4237fa | 1597 | } |
b77a493b | 1598 | |
1da177e4 | 1599 | inode->i_fop = files[i].ops; |
0619f0f5 | 1600 | inode->i_ino = ++fsi->last_ino; |
1da177e4 LT |
1601 | d_add(dentry, inode); |
1602 | } | |
b77a493b EP |
1603 | |
1604 | return 0; | |
1da177e4 LT |
1605 | } |
1606 | ||
1872981b | 1607 | static ssize_t sel_read_initcon(struct file *file, char __user *buf, |
f0ee2e46 JC |
1608 | size_t count, loff_t *ppos) |
1609 | { | |
0619f0f5 | 1610 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
f0ee2e46 JC |
1611 | char *con; |
1612 | u32 sid, len; | |
1613 | ssize_t ret; | |
1614 | ||
496ad9aa | 1615 | sid = file_inode(file)->i_ino&SEL_INO_MASK; |
0619f0f5 | 1616 | ret = security_sid_to_context(fsi->state, sid, &con, &len); |
b77a493b | 1617 | if (ret) |
f0ee2e46 JC |
1618 | return ret; |
1619 | ||
1620 | ret = simple_read_from_buffer(buf, count, ppos, con, len); | |
1621 | kfree(con); | |
1622 | return ret; | |
1623 | } | |
1624 | ||
1625 | static const struct file_operations sel_initcon_ops = { | |
1626 | .read = sel_read_initcon, | |
57a62c23 | 1627 | .llseek = generic_file_llseek, |
f0ee2e46 JC |
1628 | }; |
1629 | ||
1630 | static int sel_make_initcon_files(struct dentry *dir) | |
1631 | { | |
b77a493b | 1632 | int i; |
f0ee2e46 JC |
1633 | |
1634 | for (i = 1; i <= SECINITSID_NUM; i++) { | |
1635 | struct inode *inode; | |
1636 | struct dentry *dentry; | |
1637 | dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); | |
b77a493b EP |
1638 | if (!dentry) |
1639 | return -ENOMEM; | |
f0ee2e46 JC |
1640 | |
1641 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
7e4237fa | 1642 | if (!inode) { |
1643 | dput(dentry); | |
b77a493b | 1644 | return -ENOMEM; |
7e4237fa | 1645 | } |
b77a493b | 1646 | |
f0ee2e46 JC |
1647 | inode->i_fop = &sel_initcon_ops; |
1648 | inode->i_ino = i|SEL_INITCON_INO_OFFSET; | |
1649 | d_add(dentry, inode); | |
1650 | } | |
b77a493b EP |
1651 | |
1652 | return 0; | |
f0ee2e46 JC |
1653 | } |
1654 | ||
e47c8fc5 CP |
1655 | static inline unsigned long sel_class_to_ino(u16 class) |
1656 | { | |
1657 | return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; | |
1658 | } | |
1659 | ||
1660 | static inline u16 sel_ino_to_class(unsigned long ino) | |
1661 | { | |
92ae9e82 | 1662 | return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); |
e47c8fc5 CP |
1663 | } |
1664 | ||
1665 | static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) | |
1666 | { | |
1667 | return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; | |
1668 | } | |
1669 | ||
1670 | static inline u32 sel_ino_to_perm(unsigned long ino) | |
1671 | { | |
1672 | return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); | |
1673 | } | |
1674 | ||
1872981b | 1675 | static ssize_t sel_read_class(struct file *file, char __user *buf, |
e47c8fc5 CP |
1676 | size_t count, loff_t *ppos) |
1677 | { | |
496ad9aa | 1678 | unsigned long ino = file_inode(file)->i_ino; |
cc1dad71 AV |
1679 | char res[TMPBUFLEN]; |
1680 | ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); | |
1681 | return simple_read_from_buffer(buf, count, ppos, res, len); | |
e47c8fc5 CP |
1682 | } |
1683 | ||
1684 | static const struct file_operations sel_class_ops = { | |
1685 | .read = sel_read_class, | |
57a62c23 | 1686 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1687 | }; |
1688 | ||
1872981b | 1689 | static ssize_t sel_read_perm(struct file *file, char __user *buf, |
e47c8fc5 CP |
1690 | size_t count, loff_t *ppos) |
1691 | { | |
496ad9aa | 1692 | unsigned long ino = file_inode(file)->i_ino; |
cc1dad71 AV |
1693 | char res[TMPBUFLEN]; |
1694 | ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); | |
1695 | return simple_read_from_buffer(buf, count, ppos, res, len); | |
e47c8fc5 CP |
1696 | } |
1697 | ||
1698 | static const struct file_operations sel_perm_ops = { | |
1699 | .read = sel_read_perm, | |
57a62c23 | 1700 | .llseek = generic_file_llseek, |
e47c8fc5 CP |
1701 | }; |
1702 | ||
3bb56b25 PM |
1703 | static ssize_t sel_read_policycap(struct file *file, char __user *buf, |
1704 | size_t count, loff_t *ppos) | |
1705 | { | |
0619f0f5 | 1706 | struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; |
3bb56b25 PM |
1707 | int value; |
1708 | char tmpbuf[TMPBUFLEN]; | |
1709 | ssize_t length; | |
496ad9aa | 1710 | unsigned long i_ino = file_inode(file)->i_ino; |
3bb56b25 | 1711 | |
0619f0f5 | 1712 | value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); |
3bb56b25 PM |
1713 | length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); |
1714 | ||
1715 | return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); | |
1716 | } | |
1717 | ||
1718 | static const struct file_operations sel_policycap_ops = { | |
1719 | .read = sel_read_policycap, | |
57a62c23 | 1720 | .llseek = generic_file_llseek, |
3bb56b25 PM |
1721 | }; |
1722 | ||
e47c8fc5 CP |
1723 | static int sel_make_perm_files(char *objclass, int classvalue, |
1724 | struct dentry *dir) | |
1725 | { | |
0619f0f5 | 1726 | struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; |
b77a493b | 1727 | int i, rc, nperms; |
e47c8fc5 CP |
1728 | char **perms; |
1729 | ||
0619f0f5 | 1730 | rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); |
e47c8fc5 | 1731 | if (rc) |
b77a493b | 1732 | return rc; |
e47c8fc5 CP |
1733 | |
1734 | for (i = 0; i < nperms; i++) { | |
1735 | struct inode *inode; | |
1736 | struct dentry *dentry; | |
1737 | ||
b77a493b | 1738 | rc = -ENOMEM; |
e47c8fc5 | 1739 | dentry = d_alloc_name(dir, perms[i]); |
b77a493b EP |
1740 | if (!dentry) |
1741 | goto out; | |
e47c8fc5 | 1742 | |
b77a493b | 1743 | rc = -ENOMEM; |
e47c8fc5 | 1744 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); |
7e4237fa | 1745 | if (!inode) { |
1746 | dput(dentry); | |
b77a493b | 1747 | goto out; |
7e4237fa | 1748 | } |
b77a493b | 1749 | |
e47c8fc5 CP |
1750 | inode->i_fop = &sel_perm_ops; |
1751 | /* i+1 since perm values are 1-indexed */ | |
c1a7368a | 1752 | inode->i_ino = sel_perm_to_ino(classvalue, i + 1); |
e47c8fc5 CP |
1753 | d_add(dentry, inode); |
1754 | } | |
b77a493b EP |
1755 | rc = 0; |
1756 | out: | |
e47c8fc5 CP |
1757 | for (i = 0; i < nperms; i++) |
1758 | kfree(perms[i]); | |
1759 | kfree(perms); | |
e47c8fc5 CP |
1760 | return rc; |
1761 | } | |
1762 | ||
1763 | static int sel_make_class_dir_entries(char *classname, int index, | |
1764 | struct dentry *dir) | |
1765 | { | |
0619f0f5 SS |
1766 | struct super_block *sb = dir->d_sb; |
1767 | struct selinux_fs_info *fsi = sb->s_fs_info; | |
e47c8fc5 CP |
1768 | struct dentry *dentry = NULL; |
1769 | struct inode *inode = NULL; | |
1770 | int rc; | |
1771 | ||
1772 | dentry = d_alloc_name(dir, "index"); | |
b77a493b EP |
1773 | if (!dentry) |
1774 | return -ENOMEM; | |
e47c8fc5 CP |
1775 | |
1776 | inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); | |
7e4237fa | 1777 | if (!inode) { |
1778 | dput(dentry); | |
b77a493b | 1779 | return -ENOMEM; |
7e4237fa | 1780 | } |
e47c8fc5 CP |
1781 | |
1782 | inode->i_fop = &sel_class_ops; | |
1783 | inode->i_ino = sel_class_to_ino(index); | |
1784 | d_add(dentry, inode); | |
1785 | ||
0619f0f5 | 1786 | dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); |
a1c2aa1e AV |
1787 | if (IS_ERR(dentry)) |
1788 | return PTR_ERR(dentry); | |
e47c8fc5 CP |
1789 | |
1790 | rc = sel_make_perm_files(classname, index, dentry); | |
1791 | ||
e47c8fc5 CP |
1792 | return rc; |
1793 | } | |
1794 | ||
0619f0f5 | 1795 | static int sel_make_classes(struct selinux_fs_info *fsi) |
e47c8fc5 | 1796 | { |
0619f0f5 | 1797 | |
b77a493b | 1798 | int rc, nclasses, i; |
e47c8fc5 CP |
1799 | char **classes; |
1800 | ||
1801 | /* delete any existing entries */ | |
0619f0f5 | 1802 | sel_remove_entries(fsi->class_dir); |
e47c8fc5 | 1803 | |
0619f0f5 | 1804 | rc = security_get_classes(fsi->state, &classes, &nclasses); |
b77a493b EP |
1805 | if (rc) |
1806 | return rc; | |
e47c8fc5 CP |
1807 | |
1808 | /* +2 since classes are 1-indexed */ | |
0619f0f5 | 1809 | fsi->last_class_ino = sel_class_to_ino(nclasses + 2); |
e47c8fc5 CP |
1810 | |
1811 | for (i = 0; i < nclasses; i++) { | |
1812 | struct dentry *class_name_dir; | |
1813 | ||
0619f0f5 SS |
1814 | class_name_dir = sel_make_dir(fsi->class_dir, classes[i], |
1815 | &fsi->last_class_ino); | |
a1c2aa1e AV |
1816 | if (IS_ERR(class_name_dir)) { |
1817 | rc = PTR_ERR(class_name_dir); | |
b77a493b | 1818 | goto out; |
a1c2aa1e | 1819 | } |
e47c8fc5 CP |
1820 | |
1821 | /* i+1 since class values are 1-indexed */ | |
c1a7368a | 1822 | rc = sel_make_class_dir_entries(classes[i], i + 1, |
e47c8fc5 CP |
1823 | class_name_dir); |
1824 | if (rc) | |
b77a493b | 1825 | goto out; |
e47c8fc5 | 1826 | } |
b77a493b EP |
1827 | rc = 0; |
1828 | out: | |
e47c8fc5 CP |
1829 | for (i = 0; i < nclasses; i++) |
1830 | kfree(classes[i]); | |
1831 | kfree(classes); | |
e47c8fc5 CP |
1832 | return rc; |
1833 | } | |
1834 | ||
0619f0f5 | 1835 | static int sel_make_policycap(struct selinux_fs_info *fsi) |
3bb56b25 PM |
1836 | { |
1837 | unsigned int iter; | |
1838 | struct dentry *dentry = NULL; | |
1839 | struct inode *inode = NULL; | |
1840 | ||
0619f0f5 | 1841 | sel_remove_entries(fsi->policycap_dir); |
3bb56b25 PM |
1842 | |
1843 | for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { | |
4dc2fce3 | 1844 | if (iter < ARRAY_SIZE(selinux_policycap_names)) |
0619f0f5 | 1845 | dentry = d_alloc_name(fsi->policycap_dir, |
4dc2fce3 | 1846 | selinux_policycap_names[iter]); |
3bb56b25 | 1847 | else |
0619f0f5 | 1848 | dentry = d_alloc_name(fsi->policycap_dir, "unknown"); |
3bb56b25 PM |
1849 | |
1850 | if (dentry == NULL) | |
1851 | return -ENOMEM; | |
1852 | ||
0619f0f5 | 1853 | inode = sel_make_inode(fsi->sb, S_IFREG | 0444); |
7e4237fa | 1854 | if (inode == NULL) { |
1855 | dput(dentry); | |
3bb56b25 | 1856 | return -ENOMEM; |
7e4237fa | 1857 | } |
3bb56b25 PM |
1858 | |
1859 | inode->i_fop = &sel_policycap_ops; | |
1860 | inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; | |
1861 | d_add(dentry, inode); | |
1862 | } | |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | ||
a1c2aa1e | 1867 | static struct dentry *sel_make_dir(struct dentry *dir, const char *name, |
0dd4ae51 | 1868 | unsigned long *ino) |
1da177e4 | 1869 | { |
a1c2aa1e | 1870 | struct dentry *dentry = d_alloc_name(dir, name); |
1da177e4 LT |
1871 | struct inode *inode; |
1872 | ||
a1c2aa1e AV |
1873 | if (!dentry) |
1874 | return ERR_PTR(-ENOMEM); | |
1875 | ||
1876 | inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); | |
1877 | if (!inode) { | |
1878 | dput(dentry); | |
1879 | return ERR_PTR(-ENOMEM); | |
1880 | } | |
b77a493b | 1881 | |
1da177e4 LT |
1882 | inode->i_op = &simple_dir_inode_operations; |
1883 | inode->i_fop = &simple_dir_operations; | |
0dd4ae51 | 1884 | inode->i_ino = ++(*ino); |
40e906f8 | 1885 | /* directory inodes start off with i_nlink == 2 (for "." entry) */ |
d8c76e6f | 1886 | inc_nlink(inode); |
1da177e4 | 1887 | d_add(dentry, inode); |
edb20fb5 | 1888 | /* bump link count on parent directory, too */ |
ce0b16dd | 1889 | inc_nlink(d_inode(dir)); |
b77a493b | 1890 | |
a1c2aa1e | 1891 | return dentry; |
1da177e4 LT |
1892 | } |
1893 | ||
0619f0f5 SS |
1894 | #define NULL_FILE_NAME "null" |
1895 | ||
1872981b | 1896 | static int sel_fill_super(struct super_block *sb, void *data, int silent) |
1da177e4 | 1897 | { |
0619f0f5 | 1898 | struct selinux_fs_info *fsi; |
1da177e4 LT |
1899 | int ret; |
1900 | struct dentry *dentry; | |
a1c2aa1e | 1901 | struct inode *inode; |
1da177e4 LT |
1902 | struct inode_security_struct *isec; |
1903 | ||
cda37124 | 1904 | static const struct tree_descr selinux_files[] = { |
1da177e4 LT |
1905 | [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, |
1906 | [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, | |
ce9982d0 | 1907 | [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, |
1da177e4 LT |
1908 | [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, |
1909 | [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1910 | [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1911 | [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1912 | [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, | |
1913 | [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, | |
1914 | [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, | |
1915 | [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, | |
1916 | [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, | |
1917 | [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, | |
3f12070e EP |
1918 | [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, |
1919 | [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, | |
11904167 | 1920 | [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, |
72e8c859 | 1921 | [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, |
f9df6458 AP |
1922 | [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, |
1923 | S_IWUGO}, | |
1da177e4 LT |
1924 | /* last one */ {""} |
1925 | }; | |
0619f0f5 SS |
1926 | |
1927 | ret = selinux_fs_info_create(sb); | |
1928 | if (ret) | |
1929 | goto err; | |
1930 | ||
1da177e4 LT |
1931 | ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); |
1932 | if (ret) | |
161ce45a | 1933 | goto err; |
1da177e4 | 1934 | |
0619f0f5 SS |
1935 | fsi = sb->s_fs_info; |
1936 | fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); | |
1937 | if (IS_ERR(fsi->bool_dir)) { | |
1938 | ret = PTR_ERR(fsi->bool_dir); | |
1939 | fsi->bool_dir = NULL; | |
161ce45a | 1940 | goto err; |
a1c2aa1e | 1941 | } |
1da177e4 | 1942 | |
b77a493b | 1943 | ret = -ENOMEM; |
1da177e4 | 1944 | dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); |
b77a493b | 1945 | if (!dentry) |
161ce45a | 1946 | goto err; |
1da177e4 | 1947 | |
b77a493b | 1948 | ret = -ENOMEM; |
1da177e4 | 1949 | inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); |
7e4237fa | 1950 | if (!inode) { |
1951 | dput(dentry); | |
161ce45a | 1952 | goto err; |
7e4237fa | 1953 | } |
b77a493b | 1954 | |
0619f0f5 | 1955 | inode->i_ino = ++fsi->last_ino; |
80788c22 | 1956 | isec = selinux_inode(inode); |
1da177e4 LT |
1957 | isec->sid = SECINITSID_DEVNULL; |
1958 | isec->sclass = SECCLASS_CHR_FILE; | |
42059112 | 1959 | isec->initialized = LABEL_INITIALIZED; |
1da177e4 LT |
1960 | |
1961 | init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); | |
1962 | d_add(dentry, inode); | |
1da177e4 | 1963 | |
0619f0f5 | 1964 | dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); |
a1c2aa1e AV |
1965 | if (IS_ERR(dentry)) { |
1966 | ret = PTR_ERR(dentry); | |
161ce45a | 1967 | goto err; |
a1c2aa1e | 1968 | } |
1da177e4 LT |
1969 | |
1970 | ret = sel_make_avc_files(dentry); | |
1971 | if (ret) | |
161ce45a | 1972 | goto err; |
f0ee2e46 | 1973 | |
0619f0f5 | 1974 | dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); |
a1c2aa1e AV |
1975 | if (IS_ERR(dentry)) { |
1976 | ret = PTR_ERR(dentry); | |
f0ee2e46 | 1977 | goto err; |
a1c2aa1e | 1978 | } |
f0ee2e46 JC |
1979 | |
1980 | ret = sel_make_initcon_files(dentry); | |
1981 | if (ret) | |
1982 | goto err; | |
1983 | ||
0619f0f5 SS |
1984 | fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); |
1985 | if (IS_ERR(fsi->class_dir)) { | |
1986 | ret = PTR_ERR(fsi->class_dir); | |
1987 | fsi->class_dir = NULL; | |
3bb56b25 | 1988 | goto err; |
a1c2aa1e | 1989 | } |
3bb56b25 | 1990 | |
0619f0f5 SS |
1991 | fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", |
1992 | &fsi->last_ino); | |
1993 | if (IS_ERR(fsi->policycap_dir)) { | |
1994 | ret = PTR_ERR(fsi->policycap_dir); | |
1995 | fsi->policycap_dir = NULL; | |
3bb56b25 | 1996 | goto err; |
a1c2aa1e | 1997 | } |
0619f0f5 SS |
1998 | |
1999 | ret = sel_make_policy_nodes(fsi); | |
2000 | if (ret) | |
2001 | goto err; | |
b77a493b | 2002 | return 0; |
161ce45a | 2003 | err: |
f8b69a5f | 2004 | pr_err("SELinux: %s: failed while creating inodes\n", |
744ba35e | 2005 | __func__); |
0619f0f5 SS |
2006 | |
2007 | selinux_fs_info_free(sb); | |
2008 | ||
b77a493b | 2009 | return ret; |
1da177e4 LT |
2010 | } |
2011 | ||
fc14f2fe AV |
2012 | static struct dentry *sel_mount(struct file_system_type *fs_type, |
2013 | int flags, const char *dev_name, void *data) | |
1da177e4 | 2014 | { |
fc14f2fe | 2015 | return mount_single(fs_type, flags, data, sel_fill_super); |
1da177e4 LT |
2016 | } |
2017 | ||
0619f0f5 SS |
2018 | static void sel_kill_sb(struct super_block *sb) |
2019 | { | |
2020 | selinux_fs_info_free(sb); | |
2021 | kill_litter_super(sb); | |
2022 | } | |
2023 | ||
1da177e4 LT |
2024 | static struct file_system_type sel_fs_type = { |
2025 | .name = "selinuxfs", | |
fc14f2fe | 2026 | .mount = sel_mount, |
0619f0f5 | 2027 | .kill_sb = sel_kill_sb, |
1da177e4 LT |
2028 | }; |
2029 | ||
2030 | struct vfsmount *selinuxfs_mount; | |
0619f0f5 | 2031 | struct path selinux_null; |
1da177e4 LT |
2032 | |
2033 | static int __init init_sel_fs(void) | |
2034 | { | |
0619f0f5 SS |
2035 | struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, |
2036 | sizeof(NULL_FILE_NAME)-1); | |
1da177e4 LT |
2037 | int err; |
2038 | ||
2039 | if (!selinux_enabled) | |
2040 | return 0; | |
7a627e3b | 2041 | |
f9bb4882 EB |
2042 | err = sysfs_create_mount_point(fs_kobj, "selinux"); |
2043 | if (err) | |
2044 | return err; | |
7a627e3b | 2045 | |
1da177e4 | 2046 | err = register_filesystem(&sel_fs_type); |
7a627e3b | 2047 | if (err) { |
f9bb4882 | 2048 | sysfs_remove_mount_point(fs_kobj, "selinux"); |
b77a493b | 2049 | return err; |
7a627e3b | 2050 | } |
b77a493b | 2051 | |
765927b2 | 2052 | selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); |
b77a493b | 2053 | if (IS_ERR(selinuxfs_mount)) { |
f8b69a5f | 2054 | pr_err("selinuxfs: could not mount!\n"); |
b77a493b EP |
2055 | err = PTR_ERR(selinuxfs_mount); |
2056 | selinuxfs_mount = NULL; | |
1da177e4 | 2057 | } |
0619f0f5 SS |
2058 | selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, |
2059 | &null_name); | |
2060 | if (IS_ERR(selinux_null.dentry)) { | |
2061 | pr_err("selinuxfs: could not lookup null!\n"); | |
2062 | err = PTR_ERR(selinux_null.dentry); | |
2063 | selinux_null.dentry = NULL; | |
2064 | } | |
b77a493b | 2065 | |
1da177e4 LT |
2066 | return err; |
2067 | } | |
2068 | ||
2069 | __initcall(init_sel_fs); | |
2070 | ||
2071 | #ifdef CONFIG_SECURITY_SELINUX_DISABLE | |
2072 | void exit_sel_fs(void) | |
2073 | { | |
f9bb4882 | 2074 | sysfs_remove_mount_point(fs_kobj, "selinux"); |
fd40ffc7 | 2075 | dput(selinux_null.dentry); |
423e0ab0 | 2076 | kern_unmount(selinuxfs_mount); |
1da177e4 LT |
2077 | unregister_filesystem(&sel_fs_type); |
2078 | } | |
2079 | #endif |