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SELinux: tune avtab to reduce memory usage
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1da177e4
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1/*
2 * NSA Security-Enhanced Linux (SELinux) security module
3 *
4 * This file contains the SELinux security data structures for kernel objects.
5 *
6 * Author(s): Stephen Smalley, <sds@epoch.ncsc.mil>
7 * Chris Vance, <cvance@nai.com>
8 * Wayne Salamon, <wsalamon@nai.com>
9 * James Morris <jmorris@redhat.com>
10 *
11 * Copyright (C) 2001,2002 Networks Associates Technology, Inc.
12 * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2,
16 * as published by the Free Software Foundation.
17 */
18#ifndef _SELINUX_OBJSEC_H_
19#define _SELINUX_OBJSEC_H_
20
21#include <linux/list.h>
22#include <linux/sched.h>
23#include <linux/fs.h>
24#include <linux/binfmts.h>
25#include <linux/in.h>
9f2ad665 26#include <linux/spinlock.h>
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27#include "flask.h"
28#include "avc.h"
29
30struct task_security_struct {
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31 struct task_struct *task; /* back pointer to task object */
32 u32 osid; /* SID prior to last execve */
33 u32 sid; /* current SID */
34 u32 exec_sid; /* exec SID */
35 u32 create_sid; /* fscreate SID */
4eb582cf 36 u32 keycreate_sid; /* keycreate SID */
42c3e03e 37 u32 sockcreate_sid; /* fscreate SID */
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38 u32 ptrace_sid; /* SID of ptrace parent */
39};
40
41struct inode_security_struct {
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42 struct inode *inode; /* back pointer to inode object */
43 struct list_head list; /* list of inode_security_struct */
44 u32 task_sid; /* SID of creating task */
45 u32 sid; /* SID of this object */
46 u16 sclass; /* security class of this object */
47 unsigned char initialized; /* initialization flag */
23970741 48 struct mutex lock;
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49 unsigned char inherit; /* inherit SID from parent entry */
50};
51
52struct file_security_struct {
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53 struct file *file; /* back pointer to file object */
54 u32 sid; /* SID of open file description */
55 u32 fown_sid; /* SID of file owner (for SIGIO) */
56};
57
58struct superblock_security_struct {
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59 struct super_block *sb; /* back pointer to sb object */
60 struct list_head list; /* list of superblock_security_struct */
c312feb2 61 u32 sid; /* SID of file system superblock */
1da177e4 62 u32 def_sid; /* default SID for labeling */
c312feb2 63 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
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64 unsigned int behavior; /* labeling behavior */
65 unsigned char initialized; /* initialization flag */
66 unsigned char proc; /* proc fs */
bc7e982b 67 struct mutex lock;
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68 struct list_head isec_head;
69 spinlock_t isec_lock;
70};
71
72struct msg_security_struct {
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73 struct msg_msg *msg; /* back pointer */
74 u32 sid; /* SID of message */
75};
76
77struct ipc_security_struct {
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78 struct kern_ipc_perm *ipc_perm; /* back pointer */
79 u16 sclass; /* security class of this object */
80 u32 sid; /* SID of IPC resource */
81};
82
83struct bprm_security_struct {
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84 struct linux_binprm *bprm; /* back pointer to bprm object */
85 u32 sid; /* SID for transformed process */
86 unsigned char set;
87
88 /*
89 * unsafe is used to share failure information from bprm_apply_creds()
90 * to bprm_post_apply_creds().
91 */
92 char unsafe;
93};
94
95struct netif_security_struct {
96 struct net_device *dev; /* back pointer */
97 u32 if_sid; /* SID for this interface */
98 u32 msg_sid; /* default SID for messages received on this interface */
99};
100
101struct sk_security_struct {
1da177e4 102 struct sock *sk; /* back pointer to sk object */
892c141e 103 u32 sid; /* SID of this object */
1da177e4 104 u32 peer_sid; /* SID of peer */
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105#ifdef CONFIG_NETLABEL
106 u16 sclass; /* sock security class */
107 enum { /* NetLabel state */
108 NLBL_UNSET = 0,
109 NLBL_REQUIRE,
110 NLBL_LABELED,
111 } nlbl_state;
9f2ad665 112 spinlock_t nlbl_lock; /* protects nlbl_state */
7420ed23 113#endif
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114};
115
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116struct key_security_struct {
117 struct key *obj; /* back pointer */
118 u32 sid; /* SID of key */
119};
120
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121extern unsigned int selinux_checkreqprot;
122
123#endif /* _SELINUX_OBJSEC_H_ */