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/*
* SELinux services exported to the rest of the kernel.
*
* Author: James Morris <jmorris@redhat.com>
*
* Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
* Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
* Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
* as published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/selinux.h>
#include <linux/fs.h>
#include <linux/ipc.h>
#include "security.h"
#include "objsec.h"
void selinux_task_ctxid(struct task_struct *tsk, u32 *ctxid)
{
struct task_security_struct *tsec = tsk->security;
if (selinux_enabled)
*ctxid = tsec->sid;
else
*ctxid = 0;
}
int selinux_ctxid_to_string(u32 ctxid, char **ctx, u32 *ctxlen)
{
if (selinux_enabled)
return security_sid_to_context(ctxid, ctx, ctxlen);
else {
*ctx = NULL;
*ctxlen = 0;
}
return 0;
}
void selinux_get_inode_sid(const struct inode *inode, u32 *sid)
{
if (selinux_enabled) {
struct inode_security_struct *isec = inode->i_security;
*sid = isec->sid;
return;
}
*sid = 0;
}
void selinux_get_ipc_sid(const struct kern_ipc_perm *ipcp, u32 *sid)
{
if (selinux_enabled) {
struct ipc_security_struct *isec = ipcp->security;
*sid = isec->sid;
return;
}
*sid = 0;
}
void selinux_get_task_sid(struct task_struct *tsk, u32 *sid)
{
if (selinux_enabled) {
struct task_security_struct *tsec = tsk->security;
*sid = tsec->sid;
return;
}
*sid = 0;
}
int selinux_string_to_sid(char *str, u32 *sid)
{
if (selinux_enabled)
return security_context_to_sid(str, strlen(str), sid);
else {
*sid = 0;
return 0;
}
}
EXPORT_SYMBOL_GPL(selinux_string_to_sid);
int selinux_relabel_packet_permission(u32 sid)
{
if (selinux_enabled) {
struct task_security_struct *tsec = current->security;
return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
PACKET__RELABELTO, NULL);
}
return 0;
}
EXPORT_SYMBOL_GPL(selinux_relabel_packet_permission);
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