fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / security / selinux / exports.c
blobb6f96943be1fb456d5a998952abdd54d0ca3587b
1 /*
2 * SELinux services exported to the rest of the kernel.
4 * Author: James Morris <jmorris@redhat.com>
6 * Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 * Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
8 * Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2,
12 * as published by the Free Software Foundation.
14 #include <linux/types.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/selinux.h>
18 #include <linux/fs.h>
19 #include <linux/ipc.h>
21 #include "security.h"
22 #include "objsec.h"
24 int selinux_sid_to_string(u32 sid, char **ctx, u32 *ctxlen)
26 if (selinux_enabled)
27 return security_sid_to_context(sid, ctx, ctxlen);
28 else {
29 *ctx = NULL;
30 *ctxlen = 0;
33 return 0;
36 void selinux_get_inode_sid(const struct inode *inode, u32 *sid)
38 if (selinux_enabled) {
39 struct inode_security_struct *isec = inode->i_security;
40 *sid = isec->sid;
41 return;
43 *sid = 0;
46 void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid)
48 if (selinux_enabled) {
49 struct ipc_security_struct *isec = ipcp->security;
50 *sid = isec->sid;
51 return;
53 *sid = 0;
56 void selinux_get_task_sid(struct task_struct *tsk, u32 *sid)
58 if (selinux_enabled) {
59 struct task_security_struct *tsec = tsk->security;
60 *sid = tsec->sid;
61 return;
63 *sid = 0;
66 int selinux_string_to_sid(char *str, u32 *sid)
68 if (selinux_enabled)
69 return security_context_to_sid(str, strlen(str), sid);
70 else {
71 *sid = 0;
72 return 0;
75 EXPORT_SYMBOL_GPL(selinux_string_to_sid);
77 int selinux_relabel_packet_permission(u32 sid)
79 if (selinux_enabled) {
80 struct task_security_struct *tsec = current->security;
82 return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
83 PACKET__RELABELTO, NULL);
85 return 0;
87 EXPORT_SYMBOL_GPL(selinux_relabel_packet_permission);