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