9f2ad66509
This patch does a lot of cleanup in the SELinux NetLabel support code. A summary of the changes include: * Use RCU locking for the NetLabel state variable in the skk_security_struct instead of using the inode_security_struct mutex. * Remove unnecessary parameters in selinux_netlbl_socket_post_create(). * Rename selinux_netlbl_sk_clone_security() to selinux_netlbl_sk_security_clone() to better fit the other NetLabel sk_security functions. * Improvements to selinux_netlbl_inode_permission() to help reduce the cost of the common case. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: James Morris <jmorris@namei.org>
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/*
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* NSA Security-Enhanced Linux (SELinux) security module
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*
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* This file contains the SELinux security data structures for kernel objects.
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*
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* Author(s): Stephen Smalley, <sds@epoch.ncsc.mil>
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* Chris Vance, <cvance@nai.com>
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* Wayne Salamon, <wsalamon@nai.com>
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* James Morris <jmorris@redhat.com>
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*
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* Copyright (C) 2001,2002 Networks Associates Technology, Inc.
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* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.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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#ifndef _SELINUX_OBJSEC_H_
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#define _SELINUX_OBJSEC_H_
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#include <linux/list.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/binfmts.h>
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#include <linux/in.h>
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#include <linux/spinlock.h>
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#include "flask.h"
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#include "avc.h"
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struct task_security_struct {
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struct task_struct *task; /* back pointer to task object */
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u32 osid; /* SID prior to last execve */
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u32 sid; /* current SID */
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u32 exec_sid; /* exec SID */
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u32 create_sid; /* fscreate SID */
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u32 keycreate_sid; /* keycreate SID */
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u32 sockcreate_sid; /* fscreate SID */
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u32 ptrace_sid; /* SID of ptrace parent */
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};
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struct inode_security_struct {
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struct inode *inode; /* back pointer to inode object */
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struct list_head list; /* list of inode_security_struct */
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u32 task_sid; /* SID of creating task */
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u32 sid; /* SID of this object */
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u16 sclass; /* security class of this object */
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unsigned char initialized; /* initialization flag */
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struct mutex lock;
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unsigned char inherit; /* inherit SID from parent entry */
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};
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struct file_security_struct {
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struct file *file; /* back pointer to file object */
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u32 sid; /* SID of open file description */
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u32 fown_sid; /* SID of file owner (for SIGIO) */
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};
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struct superblock_security_struct {
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struct super_block *sb; /* back pointer to sb object */
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struct list_head list; /* list of superblock_security_struct */
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u32 sid; /* SID of file system superblock */
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u32 def_sid; /* default SID for labeling */
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u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
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unsigned int behavior; /* labeling behavior */
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unsigned char initialized; /* initialization flag */
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unsigned char proc; /* proc fs */
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struct mutex lock;
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struct list_head isec_head;
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spinlock_t isec_lock;
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};
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struct msg_security_struct {
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struct msg_msg *msg; /* back pointer */
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u32 sid; /* SID of message */
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};
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struct ipc_security_struct {
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struct kern_ipc_perm *ipc_perm; /* back pointer */
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u16 sclass; /* security class of this object */
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u32 sid; /* SID of IPC resource */
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};
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struct bprm_security_struct {
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struct linux_binprm *bprm; /* back pointer to bprm object */
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u32 sid; /* SID for transformed process */
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unsigned char set;
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/*
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* unsafe is used to share failure information from bprm_apply_creds()
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* to bprm_post_apply_creds().
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*/
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char unsafe;
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};
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struct netif_security_struct {
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struct net_device *dev; /* back pointer */
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u32 if_sid; /* SID for this interface */
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u32 msg_sid; /* default SID for messages received on this interface */
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};
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struct sk_security_struct {
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struct sock *sk; /* back pointer to sk object */
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u32 sid; /* SID of this object */
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u32 peer_sid; /* SID of peer */
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#ifdef CONFIG_NETLABEL
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u16 sclass; /* sock security class */
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enum { /* NetLabel state */
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NLBL_UNSET = 0,
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NLBL_REQUIRE,
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NLBL_LABELED,
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} nlbl_state;
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spinlock_t nlbl_lock; /* protects nlbl_state */
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#endif
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};
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struct key_security_struct {
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struct key *obj; /* back pointer */
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u32 sid; /* SID of key */
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};
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extern unsigned int selinux_checkreqprot;
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#endif /* _SELINUX_OBJSEC_H_ */
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