1 /* Updated: Karl MacMillan <kmacmillan@tresys.com>
3 * Added conditional policy language extensions
5 * Updated: Hewlett-Packard <paul@paul-moore.com>
7 * Added support for the policy capability bitmap
9 * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
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
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, version 2.
17 #include <linux/kernel.h>
18 #include <linux/pagemap.h>
19 #include <linux/slab.h>
20 #include <linux/vmalloc.h>
22 #include <linux/mutex.h>
23 #include <linux/init.h>
24 #include <linux/string.h>
25 #include <linux/security.h>
26 #include <linux/major.h>
27 #include <linux/seq_file.h>
28 #include <linux/percpu.h>
29 #include <linux/audit.h>
30 #include <linux/uaccess.h>
31 #include <linux/kobject.h>
32 #include <linux/ctype.h>
34 /* selinuxfs pseudo filesystem for exporting the security policy API.
35 Based on the proc code and the fs/nfsd/nfsctl.c code. */
42 #include "conditional.h"
44 /* Policy capability filenames */
45 static char *policycap_names
[] = {
46 "network_peer_controls",
50 unsigned int selinux_checkreqprot
= CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE
;
52 static int __init
checkreqprot_setup(char *str
)
54 unsigned long checkreqprot
;
55 if (!strict_strtoul(str
, 0, &checkreqprot
))
56 selinux_checkreqprot
= checkreqprot
? 1 : 0;
59 __setup("checkreqprot=", checkreqprot_setup
);
61 static DEFINE_MUTEX(sel_mutex
);
63 /* global data for booleans */
64 static struct dentry
*bool_dir
;
66 static char **bool_pending_names
;
67 static int *bool_pending_values
;
69 /* global data for classes */
70 static struct dentry
*class_dir
;
71 static unsigned long last_class_ino
;
73 static char policy_opened
;
75 /* global data for policy capabilities */
76 static struct dentry
*policycap_dir
;
78 /* Check whether a task is allowed to use a security operation. */
79 static int task_has_security(struct task_struct
*tsk
,
82 const struct task_security_struct
*tsec
;
86 tsec
= __task_cred(tsk
)->security
;
93 return avc_has_perm(sid
, SECINITSID_SECURITY
,
94 SECCLASS_SECURITY
, perms
, NULL
);
99 SEL_LOAD
, /* load policy */
100 SEL_ENFORCE
, /* get or set enforcing status */
101 SEL_CONTEXT
, /* validate context */
102 SEL_ACCESS
, /* compute access decision */
103 SEL_CREATE
, /* compute create labeling decision */
104 SEL_RELABEL
, /* compute relabeling decision */
105 SEL_USER
, /* compute reachable user contexts */
106 SEL_POLICYVERS
, /* return policy version for this kernel */
107 SEL_COMMIT_BOOLS
, /* commit new boolean values */
108 SEL_MLS
, /* return if MLS policy is enabled */
109 SEL_DISABLE
, /* disable SELinux until next reboot */
110 SEL_MEMBER
, /* compute polyinstantiation membership decision */
111 SEL_CHECKREQPROT
, /* check requested protection, not kernel-applied one */
112 SEL_COMPAT_NET
, /* whether to use old compat network packet controls */
113 SEL_REJECT_UNKNOWN
, /* export unknown reject handling to userspace */
114 SEL_DENY_UNKNOWN
, /* export unknown deny handling to userspace */
115 SEL_STATUS
, /* export current status using mmap() */
116 SEL_POLICY
, /* allow userspace to read the in kernel policy */
117 SEL_INO_NEXT
, /* The next inode number to use */
120 static unsigned long sel_last_ino
= SEL_INO_NEXT
- 1;
122 #define SEL_INITCON_INO_OFFSET 0x01000000
123 #define SEL_BOOL_INO_OFFSET 0x02000000
124 #define SEL_CLASS_INO_OFFSET 0x04000000
125 #define SEL_POLICYCAP_INO_OFFSET 0x08000000
126 #define SEL_INO_MASK 0x00ffffff
129 static ssize_t
sel_read_enforce(struct file
*filp
, char __user
*buf
,
130 size_t count
, loff_t
*ppos
)
132 char tmpbuf
[TMPBUFLEN
];
135 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%d", selinux_enforcing
);
136 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
139 #ifdef CONFIG_SECURITY_SELINUX_DEVELOP
140 static ssize_t
sel_write_enforce(struct file
*file
, const char __user
*buf
,
141 size_t count
, loff_t
*ppos
)
149 if (count
>= PAGE_SIZE
)
152 /* No partial writes. */
158 page
= (char *)get_zeroed_page(GFP_KERNEL
);
163 if (copy_from_user(page
, buf
, count
))
167 if (sscanf(page
, "%d", &new_value
) != 1)
170 if (new_value
!= selinux_enforcing
) {
171 length
= task_has_security(current
, SECURITY__SETENFORCE
);
174 audit_log(current
->audit_context
, GFP_KERNEL
, AUDIT_MAC_STATUS
,
175 "enforcing=%d old_enforcing=%d auid=%u ses=%u",
176 new_value
, selinux_enforcing
,
177 from_kuid(&init_user_ns
, audit_get_loginuid(current
)),
178 audit_get_sessionid(current
));
179 selinux_enforcing
= new_value
;
180 if (selinux_enforcing
)
182 selnl_notify_setenforce(selinux_enforcing
);
183 selinux_status_update_setenforce(selinux_enforcing
);
187 free_page((unsigned long) page
);
191 #define sel_write_enforce NULL
194 static const struct file_operations sel_enforce_ops
= {
195 .read
= sel_read_enforce
,
196 .write
= sel_write_enforce
,
197 .llseek
= generic_file_llseek
,
200 static ssize_t
sel_read_handle_unknown(struct file
*filp
, char __user
*buf
,
201 size_t count
, loff_t
*ppos
)
203 char tmpbuf
[TMPBUFLEN
];
205 ino_t ino
= filp
->f_path
.dentry
->d_inode
->i_ino
;
206 int handle_unknown
= (ino
== SEL_REJECT_UNKNOWN
) ?
207 security_get_reject_unknown() : !security_get_allow_unknown();
209 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%d", handle_unknown
);
210 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
213 static const struct file_operations sel_handle_unknown_ops
= {
214 .read
= sel_read_handle_unknown
,
215 .llseek
= generic_file_llseek
,
218 static int sel_open_handle_status(struct inode
*inode
, struct file
*filp
)
220 struct page
*status
= selinux_kernel_status_page();
225 filp
->private_data
= status
;
230 static ssize_t
sel_read_handle_status(struct file
*filp
, char __user
*buf
,
231 size_t count
, loff_t
*ppos
)
233 struct page
*status
= filp
->private_data
;
237 return simple_read_from_buffer(buf
, count
, ppos
,
238 page_address(status
),
239 sizeof(struct selinux_kernel_status
));
242 static int sel_mmap_handle_status(struct file
*filp
,
243 struct vm_area_struct
*vma
)
245 struct page
*status
= filp
->private_data
;
246 unsigned long size
= vma
->vm_end
- vma
->vm_start
;
250 /* only allows one page from the head */
251 if (vma
->vm_pgoff
> 0 || size
!= PAGE_SIZE
)
253 /* disallow writable mapping */
254 if (vma
->vm_flags
& VM_WRITE
)
256 /* disallow mprotect() turns it into writable */
257 vma
->vm_flags
&= ~VM_MAYWRITE
;
259 return remap_pfn_range(vma
, vma
->vm_start
,
261 size
, vma
->vm_page_prot
);
264 static const struct file_operations sel_handle_status_ops
= {
265 .open
= sel_open_handle_status
,
266 .read
= sel_read_handle_status
,
267 .mmap
= sel_mmap_handle_status
,
268 .llseek
= generic_file_llseek
,
271 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
272 static ssize_t
sel_write_disable(struct file
*file
, const char __user
*buf
,
273 size_t count
, loff_t
*ppos
)
281 if (count
>= PAGE_SIZE
)
284 /* No partial writes. */
290 page
= (char *)get_zeroed_page(GFP_KERNEL
);
295 if (copy_from_user(page
, buf
, count
))
299 if (sscanf(page
, "%d", &new_value
) != 1)
303 length
= selinux_disable();
306 audit_log(current
->audit_context
, GFP_KERNEL
, AUDIT_MAC_STATUS
,
307 "selinux=0 auid=%u ses=%u",
308 from_kuid(&init_user_ns
, audit_get_loginuid(current
)),
309 audit_get_sessionid(current
));
314 free_page((unsigned long) page
);
318 #define sel_write_disable NULL
321 static const struct file_operations sel_disable_ops
= {
322 .write
= sel_write_disable
,
323 .llseek
= generic_file_llseek
,
326 static ssize_t
sel_read_policyvers(struct file
*filp
, char __user
*buf
,
327 size_t count
, loff_t
*ppos
)
329 char tmpbuf
[TMPBUFLEN
];
332 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%u", POLICYDB_VERSION_MAX
);
333 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
336 static const struct file_operations sel_policyvers_ops
= {
337 .read
= sel_read_policyvers
,
338 .llseek
= generic_file_llseek
,
341 /* declaration for sel_write_load */
342 static int sel_make_bools(void);
343 static int sel_make_classes(void);
344 static int sel_make_policycap(void);
346 /* declaration for sel_make_class_dirs */
347 static struct dentry
*sel_make_dir(struct dentry
*dir
, const char *name
,
350 static ssize_t
sel_read_mls(struct file
*filp
, char __user
*buf
,
351 size_t count
, loff_t
*ppos
)
353 char tmpbuf
[TMPBUFLEN
];
356 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%d",
357 security_mls_enabled());
358 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
361 static const struct file_operations sel_mls_ops
= {
362 .read
= sel_read_mls
,
363 .llseek
= generic_file_llseek
,
366 struct policy_load_memory
{
371 static int sel_open_policy(struct inode
*inode
, struct file
*filp
)
373 struct policy_load_memory
*plm
= NULL
;
376 BUG_ON(filp
->private_data
);
378 mutex_lock(&sel_mutex
);
380 rc
= task_has_security(current
, SECURITY__READ_POLICY
);
389 plm
= kzalloc(sizeof(*plm
), GFP_KERNEL
);
393 if (i_size_read(inode
) != security_policydb_len()) {
394 mutex_lock(&inode
->i_mutex
);
395 i_size_write(inode
, security_policydb_len());
396 mutex_unlock(&inode
->i_mutex
);
399 rc
= security_read_policy(&plm
->data
, &plm
->len
);
405 filp
->private_data
= plm
;
407 mutex_unlock(&sel_mutex
);
411 mutex_unlock(&sel_mutex
);
419 static int sel_release_policy(struct inode
*inode
, struct file
*filp
)
421 struct policy_load_memory
*plm
= filp
->private_data
;
433 static ssize_t
sel_read_policy(struct file
*filp
, char __user
*buf
,
434 size_t count
, loff_t
*ppos
)
436 struct policy_load_memory
*plm
= filp
->private_data
;
439 mutex_lock(&sel_mutex
);
441 ret
= task_has_security(current
, SECURITY__READ_POLICY
);
445 ret
= simple_read_from_buffer(buf
, count
, ppos
, plm
->data
, plm
->len
);
447 mutex_unlock(&sel_mutex
);
451 static int sel_mmap_policy_fault(struct vm_area_struct
*vma
,
452 struct vm_fault
*vmf
)
454 struct policy_load_memory
*plm
= vma
->vm_file
->private_data
;
455 unsigned long offset
;
458 if (vmf
->flags
& (FAULT_FLAG_MKWRITE
| FAULT_FLAG_WRITE
))
459 return VM_FAULT_SIGBUS
;
461 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
462 if (offset
>= roundup(plm
->len
, PAGE_SIZE
))
463 return VM_FAULT_SIGBUS
;
465 page
= vmalloc_to_page(plm
->data
+ offset
);
473 static struct vm_operations_struct sel_mmap_policy_ops
= {
474 .fault
= sel_mmap_policy_fault
,
475 .page_mkwrite
= sel_mmap_policy_fault
,
478 static int sel_mmap_policy(struct file
*filp
, struct vm_area_struct
*vma
)
480 if (vma
->vm_flags
& VM_SHARED
) {
481 /* do not allow mprotect to make mapping writable */
482 vma
->vm_flags
&= ~VM_MAYWRITE
;
484 if (vma
->vm_flags
& VM_WRITE
)
488 vma
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
489 vma
->vm_ops
= &sel_mmap_policy_ops
;
494 static const struct file_operations sel_policy_ops
= {
495 .open
= sel_open_policy
,
496 .read
= sel_read_policy
,
497 .mmap
= sel_mmap_policy
,
498 .release
= sel_release_policy
,
499 .llseek
= generic_file_llseek
,
502 static ssize_t
sel_write_load(struct file
*file
, const char __user
*buf
,
503 size_t count
, loff_t
*ppos
)
509 mutex_lock(&sel_mutex
);
511 length
= task_has_security(current
, SECURITY__LOAD_POLICY
);
515 /* No partial writes. */
521 if (count
> 64 * 1024 * 1024)
525 data
= vmalloc(count
);
530 if (copy_from_user(data
, buf
, count
) != 0)
533 length
= security_load_policy(data
, count
);
537 length
= sel_make_bools();
541 length
= sel_make_classes();
545 length
= sel_make_policycap();
552 audit_log(current
->audit_context
, GFP_KERNEL
, AUDIT_MAC_POLICY_LOAD
,
553 "policy loaded auid=%u ses=%u",
554 from_kuid(&init_user_ns
, audit_get_loginuid(current
)),
555 audit_get_sessionid(current
));
557 mutex_unlock(&sel_mutex
);
562 static const struct file_operations sel_load_ops
= {
563 .write
= sel_write_load
,
564 .llseek
= generic_file_llseek
,
567 static ssize_t
sel_write_context(struct file
*file
, char *buf
, size_t size
)
573 length
= task_has_security(current
, SECURITY__CHECK_CONTEXT
);
577 length
= security_context_to_sid(buf
, size
, &sid
);
581 length
= security_sid_to_context(sid
, &canon
, &len
);
586 if (len
> SIMPLE_TRANSACTION_LIMIT
) {
587 printk(KERN_ERR
"SELinux: %s: context size (%u) exceeds "
588 "payload max\n", __func__
, len
);
592 memcpy(buf
, canon
, len
);
599 static ssize_t
sel_read_checkreqprot(struct file
*filp
, char __user
*buf
,
600 size_t count
, loff_t
*ppos
)
602 char tmpbuf
[TMPBUFLEN
];
605 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%u", selinux_checkreqprot
);
606 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
609 static ssize_t
sel_write_checkreqprot(struct file
*file
, const char __user
*buf
,
610 size_t count
, loff_t
*ppos
)
614 unsigned int new_value
;
616 length
= task_has_security(current
, SECURITY__SETCHECKREQPROT
);
621 if (count
>= PAGE_SIZE
)
624 /* No partial writes. */
630 page
= (char *)get_zeroed_page(GFP_KERNEL
);
635 if (copy_from_user(page
, buf
, count
))
639 if (sscanf(page
, "%u", &new_value
) != 1)
642 selinux_checkreqprot
= new_value
? 1 : 0;
645 free_page((unsigned long) page
);
648 static const struct file_operations sel_checkreqprot_ops
= {
649 .read
= sel_read_checkreqprot
,
650 .write
= sel_write_checkreqprot
,
651 .llseek
= generic_file_llseek
,
655 * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c
657 static ssize_t
sel_write_access(struct file
*file
, char *buf
, size_t size
);
658 static ssize_t
sel_write_create(struct file
*file
, char *buf
, size_t size
);
659 static ssize_t
sel_write_relabel(struct file
*file
, char *buf
, size_t size
);
660 static ssize_t
sel_write_user(struct file
*file
, char *buf
, size_t size
);
661 static ssize_t
sel_write_member(struct file
*file
, char *buf
, size_t size
);
663 static ssize_t (*write_op
[])(struct file
*, char *, size_t) = {
664 [SEL_ACCESS
] = sel_write_access
,
665 [SEL_CREATE
] = sel_write_create
,
666 [SEL_RELABEL
] = sel_write_relabel
,
667 [SEL_USER
] = sel_write_user
,
668 [SEL_MEMBER
] = sel_write_member
,
669 [SEL_CONTEXT
] = sel_write_context
,
672 static ssize_t
selinux_transaction_write(struct file
*file
, const char __user
*buf
, size_t size
, loff_t
*pos
)
674 ino_t ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
678 if (ino
>= ARRAY_SIZE(write_op
) || !write_op
[ino
])
681 data
= simple_transaction_get(file
, buf
, size
);
683 return PTR_ERR(data
);
685 rv
= write_op
[ino
](file
, data
, size
);
687 simple_transaction_set(file
, rv
);
693 static const struct file_operations transaction_ops
= {
694 .write
= selinux_transaction_write
,
695 .read
= simple_transaction_read
,
696 .release
= simple_transaction_release
,
697 .llseek
= generic_file_llseek
,
701 * payload - write methods
702 * If the method has a response, the response should be put in buf,
703 * and the length returned. Otherwise return 0 or and -error.
706 static ssize_t
sel_write_access(struct file
*file
, char *buf
, size_t size
)
708 char *scon
= NULL
, *tcon
= NULL
;
711 struct av_decision avd
;
714 length
= task_has_security(current
, SECURITY__COMPUTE_AV
);
719 scon
= kzalloc(size
+ 1, GFP_KERNEL
);
724 tcon
= kzalloc(size
+ 1, GFP_KERNEL
);
729 if (sscanf(buf
, "%s %s %hu", scon
, tcon
, &tclass
) != 3)
732 length
= security_context_to_sid(scon
, strlen(scon
) + 1, &ssid
);
736 length
= security_context_to_sid(tcon
, strlen(tcon
) + 1, &tsid
);
740 security_compute_av_user(ssid
, tsid
, tclass
, &avd
);
742 length
= scnprintf(buf
, SIMPLE_TRANSACTION_LIMIT
,
744 avd
.allowed
, 0xffffffff,
745 avd
.auditallow
, avd
.auditdeny
,
746 avd
.seqno
, avd
.flags
);
753 static ssize_t
sel_write_create(struct file
*file
, char *buf
, size_t size
)
755 char *scon
= NULL
, *tcon
= NULL
;
756 char *namebuf
= NULL
, *objname
= NULL
;
757 u32 ssid
, tsid
, newsid
;
764 length
= task_has_security(current
, SECURITY__COMPUTE_CREATE
);
769 scon
= kzalloc(size
+ 1, GFP_KERNEL
);
774 tcon
= kzalloc(size
+ 1, GFP_KERNEL
);
779 namebuf
= kzalloc(size
+ 1, GFP_KERNEL
);
784 nargs
= sscanf(buf
, "%s %s %hu %s", scon
, tcon
, &tclass
, namebuf
);
785 if (nargs
< 3 || nargs
> 4)
789 * If and when the name of new object to be queried contains
790 * either whitespace or multibyte characters, they shall be
791 * encoded based on the percentage-encoding rule.
792 * If not encoded, the sscanf logic picks up only left-half
793 * of the supplied name; splitted by a whitespace unexpectedly.
803 else if (c1
== '%') {
804 c1
= hex_to_bin(*r
++);
807 c2
= hex_to_bin(*r
++);
813 } while (c1
!= '\0');
818 length
= security_context_to_sid(scon
, strlen(scon
) + 1, &ssid
);
822 length
= security_context_to_sid(tcon
, strlen(tcon
) + 1, &tsid
);
826 length
= security_transition_sid_user(ssid
, tsid
, tclass
,
831 length
= security_sid_to_context(newsid
, &newcon
, &len
);
836 if (len
> SIMPLE_TRANSACTION_LIMIT
) {
837 printk(KERN_ERR
"SELinux: %s: context size (%u) exceeds "
838 "payload max\n", __func__
, len
);
842 memcpy(buf
, newcon
, len
);
852 static ssize_t
sel_write_relabel(struct file
*file
, char *buf
, size_t size
)
854 char *scon
= NULL
, *tcon
= NULL
;
855 u32 ssid
, tsid
, newsid
;
861 length
= task_has_security(current
, SECURITY__COMPUTE_RELABEL
);
866 scon
= kzalloc(size
+ 1, GFP_KERNEL
);
871 tcon
= kzalloc(size
+ 1, GFP_KERNEL
);
876 if (sscanf(buf
, "%s %s %hu", scon
, tcon
, &tclass
) != 3)
879 length
= security_context_to_sid(scon
, strlen(scon
) + 1, &ssid
);
883 length
= security_context_to_sid(tcon
, strlen(tcon
) + 1, &tsid
);
887 length
= security_change_sid(ssid
, tsid
, tclass
, &newsid
);
891 length
= security_sid_to_context(newsid
, &newcon
, &len
);
896 if (len
> SIMPLE_TRANSACTION_LIMIT
)
899 memcpy(buf
, newcon
, len
);
908 static ssize_t
sel_write_user(struct file
*file
, char *buf
, size_t size
)
910 char *con
= NULL
, *user
= NULL
, *ptr
;
911 u32 sid
, *sids
= NULL
;
917 length
= task_has_security(current
, SECURITY__COMPUTE_USER
);
922 con
= kzalloc(size
+ 1, GFP_KERNEL
);
927 user
= kzalloc(size
+ 1, GFP_KERNEL
);
932 if (sscanf(buf
, "%s %s", con
, user
) != 2)
935 length
= security_context_to_sid(con
, strlen(con
) + 1, &sid
);
939 length
= security_get_user_sids(sid
, user
, &sids
, &nsids
);
943 length
= sprintf(buf
, "%u", nsids
) + 1;
945 for (i
= 0; i
< nsids
; i
++) {
946 rc
= security_sid_to_context(sids
[i
], &newcon
, &len
);
951 if ((length
+ len
) >= SIMPLE_TRANSACTION_LIMIT
) {
956 memcpy(ptr
, newcon
, len
);
968 static ssize_t
sel_write_member(struct file
*file
, char *buf
, size_t size
)
970 char *scon
= NULL
, *tcon
= NULL
;
971 u32 ssid
, tsid
, newsid
;
977 length
= task_has_security(current
, SECURITY__COMPUTE_MEMBER
);
982 scon
= kzalloc(size
+ 1, GFP_KERNEL
);
987 tcon
= kzalloc(size
+ 1, GFP_KERNEL
);
992 if (sscanf(buf
, "%s %s %hu", scon
, tcon
, &tclass
) != 3)
995 length
= security_context_to_sid(scon
, strlen(scon
) + 1, &ssid
);
999 length
= security_context_to_sid(tcon
, strlen(tcon
) + 1, &tsid
);
1003 length
= security_member_sid(ssid
, tsid
, tclass
, &newsid
);
1007 length
= security_sid_to_context(newsid
, &newcon
, &len
);
1012 if (len
> SIMPLE_TRANSACTION_LIMIT
) {
1013 printk(KERN_ERR
"SELinux: %s: context size (%u) exceeds "
1014 "payload max\n", __func__
, len
);
1018 memcpy(buf
, newcon
, len
);
1027 static struct inode
*sel_make_inode(struct super_block
*sb
, int mode
)
1029 struct inode
*ret
= new_inode(sb
);
1033 ret
->i_atime
= ret
->i_mtime
= ret
->i_ctime
= CURRENT_TIME
;
1038 static ssize_t
sel_read_bool(struct file
*filep
, char __user
*buf
,
1039 size_t count
, loff_t
*ppos
)
1045 struct inode
*inode
= filep
->f_path
.dentry
->d_inode
;
1046 unsigned index
= inode
->i_ino
& SEL_INO_MASK
;
1047 const char *name
= filep
->f_path
.dentry
->d_name
.name
;
1049 mutex_lock(&sel_mutex
);
1052 if (index
>= bool_num
|| strcmp(name
, bool_pending_names
[index
]))
1056 page
= (char *)get_zeroed_page(GFP_KERNEL
);
1060 cur_enforcing
= security_get_bool_value(index
);
1061 if (cur_enforcing
< 0) {
1062 ret
= cur_enforcing
;
1065 length
= scnprintf(page
, PAGE_SIZE
, "%d %d", cur_enforcing
,
1066 bool_pending_values
[index
]);
1067 ret
= simple_read_from_buffer(buf
, count
, ppos
, page
, length
);
1069 mutex_unlock(&sel_mutex
);
1070 free_page((unsigned long)page
);
1074 static ssize_t
sel_write_bool(struct file
*filep
, const char __user
*buf
,
1075 size_t count
, loff_t
*ppos
)
1080 struct inode
*inode
= filep
->f_path
.dentry
->d_inode
;
1081 unsigned index
= inode
->i_ino
& SEL_INO_MASK
;
1082 const char *name
= filep
->f_path
.dentry
->d_name
.name
;
1084 mutex_lock(&sel_mutex
);
1086 length
= task_has_security(current
, SECURITY__SETBOOL
);
1091 if (index
>= bool_num
|| strcmp(name
, bool_pending_names
[index
]))
1095 if (count
>= PAGE_SIZE
)
1098 /* No partial writes. */
1104 page
= (char *)get_zeroed_page(GFP_KERNEL
);
1109 if (copy_from_user(page
, buf
, count
))
1113 if (sscanf(page
, "%d", &new_value
) != 1)
1119 bool_pending_values
[index
] = new_value
;
1123 mutex_unlock(&sel_mutex
);
1124 free_page((unsigned long) page
);
1128 static const struct file_operations sel_bool_ops
= {
1129 .read
= sel_read_bool
,
1130 .write
= sel_write_bool
,
1131 .llseek
= generic_file_llseek
,
1134 static ssize_t
sel_commit_bools_write(struct file
*filep
,
1135 const char __user
*buf
,
1136 size_t count
, loff_t
*ppos
)
1142 mutex_lock(&sel_mutex
);
1144 length
= task_has_security(current
, SECURITY__SETBOOL
);
1149 if (count
>= PAGE_SIZE
)
1152 /* No partial writes. */
1158 page
= (char *)get_zeroed_page(GFP_KERNEL
);
1163 if (copy_from_user(page
, buf
, count
))
1167 if (sscanf(page
, "%d", &new_value
) != 1)
1171 if (new_value
&& bool_pending_values
)
1172 length
= security_set_bools(bool_num
, bool_pending_values
);
1178 mutex_unlock(&sel_mutex
);
1179 free_page((unsigned long) page
);
1183 static const struct file_operations sel_commit_bools_ops
= {
1184 .write
= sel_commit_bools_write
,
1185 .llseek
= generic_file_llseek
,
1188 static void sel_remove_entries(struct dentry
*de
)
1190 struct list_head
*node
;
1192 spin_lock(&de
->d_lock
);
1193 node
= de
->d_subdirs
.next
;
1194 while (node
!= &de
->d_subdirs
) {
1195 struct dentry
*d
= list_entry(node
, struct dentry
, d_u
.d_child
);
1197 spin_lock_nested(&d
->d_lock
, DENTRY_D_LOCK_NESTED
);
1198 list_del_init(node
);
1202 spin_unlock(&de
->d_lock
);
1203 spin_unlock(&d
->d_lock
);
1205 simple_unlink(de
->d_inode
, d
);
1207 spin_lock(&de
->d_lock
);
1209 spin_unlock(&d
->d_lock
);
1210 node
= de
->d_subdirs
.next
;
1213 spin_unlock(&de
->d_lock
);
1216 #define BOOL_DIR_NAME "booleans"
1218 static int sel_make_bools(void)
1222 struct dentry
*dentry
= NULL
;
1223 struct dentry
*dir
= bool_dir
;
1224 struct inode
*inode
= NULL
;
1225 struct inode_security_struct
*isec
;
1226 char **names
= NULL
, *page
;
1231 /* remove any existing files */
1232 for (i
= 0; i
< bool_num
; i
++)
1233 kfree(bool_pending_names
[i
]);
1234 kfree(bool_pending_names
);
1235 kfree(bool_pending_values
);
1237 bool_pending_names
= NULL
;
1238 bool_pending_values
= NULL
;
1240 sel_remove_entries(dir
);
1243 page
= (char *)get_zeroed_page(GFP_KERNEL
);
1247 ret
= security_get_bools(&num
, &names
, &values
);
1251 for (i
= 0; i
< num
; i
++) {
1253 dentry
= d_alloc_name(dir
, names
[i
]);
1258 inode
= sel_make_inode(dir
->d_sb
, S_IFREG
| S_IRUGO
| S_IWUSR
);
1262 ret
= -ENAMETOOLONG
;
1263 len
= snprintf(page
, PAGE_SIZE
, "/%s/%s", BOOL_DIR_NAME
, names
[i
]);
1264 if (len
>= PAGE_SIZE
)
1267 isec
= (struct inode_security_struct
*)inode
->i_security
;
1268 ret
= security_genfs_sid("selinuxfs", page
, SECCLASS_FILE
, &sid
);
1273 isec
->initialized
= 1;
1274 inode
->i_fop
= &sel_bool_ops
;
1275 inode
->i_ino
= i
|SEL_BOOL_INO_OFFSET
;
1276 d_add(dentry
, inode
);
1279 bool_pending_names
= names
;
1280 bool_pending_values
= values
;
1282 free_page((unsigned long)page
);
1285 free_page((unsigned long)page
);
1288 for (i
= 0; i
< num
; i
++)
1293 sel_remove_entries(dir
);
1298 #define NULL_FILE_NAME "null"
1300 struct path selinux_null
;
1302 static ssize_t
sel_read_avc_cache_threshold(struct file
*filp
, char __user
*buf
,
1303 size_t count
, loff_t
*ppos
)
1305 char tmpbuf
[TMPBUFLEN
];
1308 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%u", avc_cache_threshold
);
1309 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
1312 static ssize_t
sel_write_avc_cache_threshold(struct file
*file
,
1313 const char __user
*buf
,
1314 size_t count
, loff_t
*ppos
)
1321 ret
= task_has_security(current
, SECURITY__SETSECPARAM
);
1326 if (count
>= PAGE_SIZE
)
1329 /* No partial writes. */
1335 page
= (char *)get_zeroed_page(GFP_KERNEL
);
1340 if (copy_from_user(page
, buf
, count
))
1344 if (sscanf(page
, "%u", &new_value
) != 1)
1347 avc_cache_threshold
= new_value
;
1351 free_page((unsigned long)page
);
1355 static ssize_t
sel_read_avc_hash_stats(struct file
*filp
, char __user
*buf
,
1356 size_t count
, loff_t
*ppos
)
1361 page
= (char *)__get_free_page(GFP_KERNEL
);
1365 length
= avc_get_hash_stats(page
);
1367 length
= simple_read_from_buffer(buf
, count
, ppos
, page
, length
);
1368 free_page((unsigned long)page
);
1373 static const struct file_operations sel_avc_cache_threshold_ops
= {
1374 .read
= sel_read_avc_cache_threshold
,
1375 .write
= sel_write_avc_cache_threshold
,
1376 .llseek
= generic_file_llseek
,
1379 static const struct file_operations sel_avc_hash_stats_ops
= {
1380 .read
= sel_read_avc_hash_stats
,
1381 .llseek
= generic_file_llseek
,
1384 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
1385 static struct avc_cache_stats
*sel_avc_get_stat_idx(loff_t
*idx
)
1389 for (cpu
= *idx
; cpu
< nr_cpu_ids
; ++cpu
) {
1390 if (!cpu_possible(cpu
))
1393 return &per_cpu(avc_cache_stats
, cpu
);
1398 static void *sel_avc_stats_seq_start(struct seq_file
*seq
, loff_t
*pos
)
1400 loff_t n
= *pos
- 1;
1403 return SEQ_START_TOKEN
;
1405 return sel_avc_get_stat_idx(&n
);
1408 static void *sel_avc_stats_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1410 return sel_avc_get_stat_idx(pos
);
1413 static int sel_avc_stats_seq_show(struct seq_file
*seq
, void *v
)
1415 struct avc_cache_stats
*st
= v
;
1417 if (v
== SEQ_START_TOKEN
)
1418 seq_printf(seq
, "lookups hits misses allocations reclaims "
1421 unsigned int lookups
= st
->lookups
;
1422 unsigned int misses
= st
->misses
;
1423 unsigned int hits
= lookups
- misses
;
1424 seq_printf(seq
, "%u %u %u %u %u %u\n", lookups
,
1425 hits
, misses
, st
->allocations
,
1426 st
->reclaims
, st
->frees
);
1431 static void sel_avc_stats_seq_stop(struct seq_file
*seq
, void *v
)
1434 static const struct seq_operations sel_avc_cache_stats_seq_ops
= {
1435 .start
= sel_avc_stats_seq_start
,
1436 .next
= sel_avc_stats_seq_next
,
1437 .show
= sel_avc_stats_seq_show
,
1438 .stop
= sel_avc_stats_seq_stop
,
1441 static int sel_open_avc_cache_stats(struct inode
*inode
, struct file
*file
)
1443 return seq_open(file
, &sel_avc_cache_stats_seq_ops
);
1446 static const struct file_operations sel_avc_cache_stats_ops
= {
1447 .open
= sel_open_avc_cache_stats
,
1449 .llseek
= seq_lseek
,
1450 .release
= seq_release
,
1454 static int sel_make_avc_files(struct dentry
*dir
)
1457 static struct tree_descr files
[] = {
1458 { "cache_threshold",
1459 &sel_avc_cache_threshold_ops
, S_IRUGO
|S_IWUSR
},
1460 { "hash_stats", &sel_avc_hash_stats_ops
, S_IRUGO
},
1461 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
1462 { "cache_stats", &sel_avc_cache_stats_ops
, S_IRUGO
},
1466 for (i
= 0; i
< ARRAY_SIZE(files
); i
++) {
1467 struct inode
*inode
;
1468 struct dentry
*dentry
;
1470 dentry
= d_alloc_name(dir
, files
[i
].name
);
1474 inode
= sel_make_inode(dir
->d_sb
, S_IFREG
|files
[i
].mode
);
1478 inode
->i_fop
= files
[i
].ops
;
1479 inode
->i_ino
= ++sel_last_ino
;
1480 d_add(dentry
, inode
);
1486 static ssize_t
sel_read_initcon(struct file
*file
, char __user
*buf
,
1487 size_t count
, loff_t
*ppos
)
1489 struct inode
*inode
;
1494 inode
= file
->f_path
.dentry
->d_inode
;
1495 sid
= inode
->i_ino
&SEL_INO_MASK
;
1496 ret
= security_sid_to_context(sid
, &con
, &len
);
1500 ret
= simple_read_from_buffer(buf
, count
, ppos
, con
, len
);
1505 static const struct file_operations sel_initcon_ops
= {
1506 .read
= sel_read_initcon
,
1507 .llseek
= generic_file_llseek
,
1510 static int sel_make_initcon_files(struct dentry
*dir
)
1514 for (i
= 1; i
<= SECINITSID_NUM
; i
++) {
1515 struct inode
*inode
;
1516 struct dentry
*dentry
;
1517 dentry
= d_alloc_name(dir
, security_get_initial_sid_context(i
));
1521 inode
= sel_make_inode(dir
->d_sb
, S_IFREG
|S_IRUGO
);
1525 inode
->i_fop
= &sel_initcon_ops
;
1526 inode
->i_ino
= i
|SEL_INITCON_INO_OFFSET
;
1527 d_add(dentry
, inode
);
1533 static inline unsigned long sel_class_to_ino(u16
class)
1535 return (class * (SEL_VEC_MAX
+ 1)) | SEL_CLASS_INO_OFFSET
;
1538 static inline u16
sel_ino_to_class(unsigned long ino
)
1540 return (ino
& SEL_INO_MASK
) / (SEL_VEC_MAX
+ 1);
1543 static inline unsigned long sel_perm_to_ino(u16
class, u32 perm
)
1545 return (class * (SEL_VEC_MAX
+ 1) + perm
) | SEL_CLASS_INO_OFFSET
;
1548 static inline u32
sel_ino_to_perm(unsigned long ino
)
1550 return (ino
& SEL_INO_MASK
) % (SEL_VEC_MAX
+ 1);
1553 static ssize_t
sel_read_class(struct file
*file
, char __user
*buf
,
1554 size_t count
, loff_t
*ppos
)
1556 unsigned long ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
1557 char res
[TMPBUFLEN
];
1558 ssize_t len
= snprintf(res
, sizeof(res
), "%d", sel_ino_to_class(ino
));
1559 return simple_read_from_buffer(buf
, count
, ppos
, res
, len
);
1562 static const struct file_operations sel_class_ops
= {
1563 .read
= sel_read_class
,
1564 .llseek
= generic_file_llseek
,
1567 static ssize_t
sel_read_perm(struct file
*file
, char __user
*buf
,
1568 size_t count
, loff_t
*ppos
)
1570 unsigned long ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
1571 char res
[TMPBUFLEN
];
1572 ssize_t len
= snprintf(res
, sizeof(res
), "%d", sel_ino_to_perm(ino
));
1573 return simple_read_from_buffer(buf
, count
, ppos
, res
, len
);
1576 static const struct file_operations sel_perm_ops
= {
1577 .read
= sel_read_perm
,
1578 .llseek
= generic_file_llseek
,
1581 static ssize_t
sel_read_policycap(struct file
*file
, char __user
*buf
,
1582 size_t count
, loff_t
*ppos
)
1585 char tmpbuf
[TMPBUFLEN
];
1587 unsigned long i_ino
= file
->f_path
.dentry
->d_inode
->i_ino
;
1589 value
= security_policycap_supported(i_ino
& SEL_INO_MASK
);
1590 length
= scnprintf(tmpbuf
, TMPBUFLEN
, "%d", value
);
1592 return simple_read_from_buffer(buf
, count
, ppos
, tmpbuf
, length
);
1595 static const struct file_operations sel_policycap_ops
= {
1596 .read
= sel_read_policycap
,
1597 .llseek
= generic_file_llseek
,
1600 static int sel_make_perm_files(char *objclass
, int classvalue
,
1606 rc
= security_get_permissions(objclass
, &perms
, &nperms
);
1610 for (i
= 0; i
< nperms
; i
++) {
1611 struct inode
*inode
;
1612 struct dentry
*dentry
;
1615 dentry
= d_alloc_name(dir
, perms
[i
]);
1620 inode
= sel_make_inode(dir
->d_sb
, S_IFREG
|S_IRUGO
);
1624 inode
->i_fop
= &sel_perm_ops
;
1625 /* i+1 since perm values are 1-indexed */
1626 inode
->i_ino
= sel_perm_to_ino(classvalue
, i
+ 1);
1627 d_add(dentry
, inode
);
1631 for (i
= 0; i
< nperms
; i
++)
1637 static int sel_make_class_dir_entries(char *classname
, int index
,
1640 struct dentry
*dentry
= NULL
;
1641 struct inode
*inode
= NULL
;
1644 dentry
= d_alloc_name(dir
, "index");
1648 inode
= sel_make_inode(dir
->d_sb
, S_IFREG
|S_IRUGO
);
1652 inode
->i_fop
= &sel_class_ops
;
1653 inode
->i_ino
= sel_class_to_ino(index
);
1654 d_add(dentry
, inode
);
1656 dentry
= sel_make_dir(dir
, "perms", &last_class_ino
);
1658 return PTR_ERR(dentry
);
1660 rc
= sel_make_perm_files(classname
, index
, dentry
);
1665 static void sel_remove_classes(void)
1667 struct list_head
*class_node
;
1669 list_for_each(class_node
, &class_dir
->d_subdirs
) {
1670 struct dentry
*class_subdir
= list_entry(class_node
,
1671 struct dentry
, d_u
.d_child
);
1672 struct list_head
*class_subdir_node
;
1674 list_for_each(class_subdir_node
, &class_subdir
->d_subdirs
) {
1675 struct dentry
*d
= list_entry(class_subdir_node
,
1676 struct dentry
, d_u
.d_child
);
1679 if (d
->d_inode
->i_mode
& S_IFDIR
)
1680 sel_remove_entries(d
);
1683 sel_remove_entries(class_subdir
);
1686 sel_remove_entries(class_dir
);
1689 static int sel_make_classes(void)
1691 int rc
, nclasses
, i
;
1694 /* delete any existing entries */
1695 sel_remove_classes();
1697 rc
= security_get_classes(&classes
, &nclasses
);
1701 /* +2 since classes are 1-indexed */
1702 last_class_ino
= sel_class_to_ino(nclasses
+ 2);
1704 for (i
= 0; i
< nclasses
; i
++) {
1705 struct dentry
*class_name_dir
;
1707 class_name_dir
= sel_make_dir(class_dir
, classes
[i
],
1709 if (IS_ERR(class_name_dir
)) {
1710 rc
= PTR_ERR(class_name_dir
);
1714 /* i+1 since class values are 1-indexed */
1715 rc
= sel_make_class_dir_entries(classes
[i
], i
+ 1,
1722 for (i
= 0; i
< nclasses
; i
++)
1728 static int sel_make_policycap(void)
1731 struct dentry
*dentry
= NULL
;
1732 struct inode
*inode
= NULL
;
1734 sel_remove_entries(policycap_dir
);
1736 for (iter
= 0; iter
<= POLICYDB_CAPABILITY_MAX
; iter
++) {
1737 if (iter
< ARRAY_SIZE(policycap_names
))
1738 dentry
= d_alloc_name(policycap_dir
,
1739 policycap_names
[iter
]);
1741 dentry
= d_alloc_name(policycap_dir
, "unknown");
1746 inode
= sel_make_inode(policycap_dir
->d_sb
, S_IFREG
| S_IRUGO
);
1750 inode
->i_fop
= &sel_policycap_ops
;
1751 inode
->i_ino
= iter
| SEL_POLICYCAP_INO_OFFSET
;
1752 d_add(dentry
, inode
);
1758 static struct dentry
*sel_make_dir(struct dentry
*dir
, const char *name
,
1761 struct dentry
*dentry
= d_alloc_name(dir
, name
);
1762 struct inode
*inode
;
1765 return ERR_PTR(-ENOMEM
);
1767 inode
= sel_make_inode(dir
->d_sb
, S_IFDIR
| S_IRUGO
| S_IXUGO
);
1770 return ERR_PTR(-ENOMEM
);
1773 inode
->i_op
= &simple_dir_inode_operations
;
1774 inode
->i_fop
= &simple_dir_operations
;
1775 inode
->i_ino
= ++(*ino
);
1776 /* directory inodes start off with i_nlink == 2 (for "." entry) */
1778 d_add(dentry
, inode
);
1779 /* bump link count on parent directory, too */
1780 inc_nlink(dir
->d_inode
);
1785 static int sel_fill_super(struct super_block
*sb
, void *data
, int silent
)
1788 struct dentry
*dentry
;
1789 struct inode
*inode
;
1790 struct inode_security_struct
*isec
;
1792 static struct tree_descr selinux_files
[] = {
1793 [SEL_LOAD
] = {"load", &sel_load_ops
, S_IRUSR
|S_IWUSR
},
1794 [SEL_ENFORCE
] = {"enforce", &sel_enforce_ops
, S_IRUGO
|S_IWUSR
},
1795 [SEL_CONTEXT
] = {"context", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1796 [SEL_ACCESS
] = {"access", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1797 [SEL_CREATE
] = {"create", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1798 [SEL_RELABEL
] = {"relabel", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1799 [SEL_USER
] = {"user", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1800 [SEL_POLICYVERS
] = {"policyvers", &sel_policyvers_ops
, S_IRUGO
},
1801 [SEL_COMMIT_BOOLS
] = {"commit_pending_bools", &sel_commit_bools_ops
, S_IWUSR
},
1802 [SEL_MLS
] = {"mls", &sel_mls_ops
, S_IRUGO
},
1803 [SEL_DISABLE
] = {"disable", &sel_disable_ops
, S_IWUSR
},
1804 [SEL_MEMBER
] = {"member", &transaction_ops
, S_IRUGO
|S_IWUGO
},
1805 [SEL_CHECKREQPROT
] = {"checkreqprot", &sel_checkreqprot_ops
, S_IRUGO
|S_IWUSR
},
1806 [SEL_REJECT_UNKNOWN
] = {"reject_unknown", &sel_handle_unknown_ops
, S_IRUGO
},
1807 [SEL_DENY_UNKNOWN
] = {"deny_unknown", &sel_handle_unknown_ops
, S_IRUGO
},
1808 [SEL_STATUS
] = {"status", &sel_handle_status_ops
, S_IRUGO
},
1809 [SEL_POLICY
] = {"policy", &sel_policy_ops
, S_IRUGO
},
1812 ret
= simple_fill_super(sb
, SELINUX_MAGIC
, selinux_files
);
1816 bool_dir
= sel_make_dir(sb
->s_root
, BOOL_DIR_NAME
, &sel_last_ino
);
1817 if (IS_ERR(bool_dir
)) {
1818 ret
= PTR_ERR(bool_dir
);
1824 dentry
= d_alloc_name(sb
->s_root
, NULL_FILE_NAME
);
1829 inode
= sel_make_inode(sb
, S_IFCHR
| S_IRUGO
| S_IWUGO
);
1833 inode
->i_ino
= ++sel_last_ino
;
1834 isec
= (struct inode_security_struct
*)inode
->i_security
;
1835 isec
->sid
= SECINITSID_DEVNULL
;
1836 isec
->sclass
= SECCLASS_CHR_FILE
;
1837 isec
->initialized
= 1;
1839 init_special_inode(inode
, S_IFCHR
| S_IRUGO
| S_IWUGO
, MKDEV(MEM_MAJOR
, 3));
1840 d_add(dentry
, inode
);
1841 selinux_null
.dentry
= dentry
;
1843 dentry
= sel_make_dir(sb
->s_root
, "avc", &sel_last_ino
);
1844 if (IS_ERR(dentry
)) {
1845 ret
= PTR_ERR(dentry
);
1849 ret
= sel_make_avc_files(dentry
);
1853 dentry
= sel_make_dir(sb
->s_root
, "initial_contexts", &sel_last_ino
);
1854 if (IS_ERR(dentry
)) {
1855 ret
= PTR_ERR(dentry
);
1859 ret
= sel_make_initcon_files(dentry
);
1863 class_dir
= sel_make_dir(sb
->s_root
, "class", &sel_last_ino
);
1864 if (IS_ERR(class_dir
)) {
1865 ret
= PTR_ERR(class_dir
);
1870 policycap_dir
= sel_make_dir(sb
->s_root
, "policy_capabilities", &sel_last_ino
);
1871 if (IS_ERR(policycap_dir
)) {
1872 ret
= PTR_ERR(policycap_dir
);
1873 policycap_dir
= NULL
;
1878 printk(KERN_ERR
"SELinux: %s: failed while creating inodes\n",
1883 static struct dentry
*sel_mount(struct file_system_type
*fs_type
,
1884 int flags
, const char *dev_name
, void *data
)
1886 return mount_single(fs_type
, flags
, data
, sel_fill_super
);
1889 static struct file_system_type sel_fs_type
= {
1890 .name
= "selinuxfs",
1892 .kill_sb
= kill_litter_super
,
1895 struct vfsmount
*selinuxfs_mount
;
1896 static struct kobject
*selinuxfs_kobj
;
1898 static int __init
init_sel_fs(void)
1902 if (!selinux_enabled
)
1905 selinuxfs_kobj
= kobject_create_and_add("selinux", fs_kobj
);
1906 if (!selinuxfs_kobj
)
1909 err
= register_filesystem(&sel_fs_type
);
1911 kobject_put(selinuxfs_kobj
);
1915 selinux_null
.mnt
= selinuxfs_mount
= kern_mount(&sel_fs_type
);
1916 if (IS_ERR(selinuxfs_mount
)) {
1917 printk(KERN_ERR
"selinuxfs: could not mount!\n");
1918 err
= PTR_ERR(selinuxfs_mount
);
1919 selinuxfs_mount
= NULL
;
1925 __initcall(init_sel_fs
);
1927 #ifdef CONFIG_SECURITY_SELINUX_DISABLE
1928 void exit_sel_fs(void)
1930 kobject_put(selinuxfs_kobj
);
1931 kern_unmount(selinuxfs_mount
);
1932 unregister_filesystem(&sel_fs_type
);