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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>
26#include <linux/spinlock.h>
27#include <net/net_namespace.h>
28#include "flask.h"
29#include "avc.h"
30
31struct task_security_struct {
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 */
36 u32 keycreate_sid; /* keycreate SID */
37 u32 sockcreate_sid; /* fscreate SID */
38};
39
40/*
41 * get the subjective security ID of the current task
42 */
43static inline u32 current_sid(void)
44{
45 const struct task_security_struct *tsec = current_security();
46
47 return tsec->sid;
48}
49
50enum label_initialized {
51 LABEL_INVALID, /* invalid or not initialized */
52 LABEL_INITIALIZED, /* initialized */
53 LABEL_PENDING
54};
55
56struct inode_security_struct {
57 struct inode *inode; /* back pointer to inode object */
58 union {
59 struct list_head list; /* list of inode_security_struct */
60 struct rcu_head rcu; /* for freeing the inode_security_struct */
61 };
62 u32 task_sid; /* SID of creating task */
63 u32 sid; /* SID of this object */
64 u16 sclass; /* security class of this object */
65 unsigned char initialized; /* initialization flag */
66 spinlock_t lock;
67};
68
69struct file_security_struct {
70 u32 sid; /* SID of open file description */
71 u32 fown_sid; /* SID of file owner (for SIGIO) */
72 u32 isid; /* SID of inode at the time of file open */
73 u32 pseqno; /* Policy seqno at the time of file open */
74};
75
76struct superblock_security_struct {
77 struct super_block *sb; /* back pointer to sb object */
78 u32 sid; /* SID of file system superblock */
79 u32 def_sid; /* default SID for labeling */
80 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
81 unsigned short behavior; /* labeling behavior */
82 unsigned short flags; /* which mount options were specified */
83 struct mutex lock;
84 struct list_head isec_head;
85 spinlock_t isec_lock;
86};
87
88struct msg_security_struct {
89 u32 sid; /* SID of message */
90};
91
92struct ipc_security_struct {
93 u16 sclass; /* security class of this object */
94 u32 sid; /* SID of IPC resource */
95};
96
97struct netif_security_struct {
98 struct net *ns; /* network namespace */
99 int ifindex; /* device index */
100 u32 sid; /* SID for this interface */
101};
102
103struct netnode_security_struct {
104 union {
105 __be32 ipv4; /* IPv4 node address */
106 struct in6_addr ipv6; /* IPv6 node address */
107 } addr;
108 u32 sid; /* SID for this node */
109 u16 family; /* address family */
110};
111
112struct netport_security_struct {
113 u32 sid; /* SID for this node */
114 u16 port; /* port number */
115 u8 protocol; /* transport protocol */
116};
117
118struct sk_security_struct {
119#ifdef CONFIG_NETLABEL
120 enum { /* NetLabel state */
121 NLBL_UNSET = 0,
122 NLBL_REQUIRE,
123 NLBL_LABELED,
124 NLBL_REQSKB,
125 NLBL_CONNLABELED,
126 } nlbl_state;
127 struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */
128#endif
129 u32 sid; /* SID of this object */
130 u32 peer_sid; /* SID of peer */
131 u16 sclass; /* sock security class */
132};
133
134struct tun_security_struct {
135 u32 sid; /* SID for the tun device sockets */
136};
137
138struct key_security_struct {
139 u32 sid; /* SID of key */
140};
141
142extern unsigned int selinux_checkreqprot;
143
144#endif /* _SELINUX_OBJSEC_H_ */