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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * NSA Security-Enhanced Linux (SELinux) security module
4 *
5 * This file contains the SELinux security data structures for kernel objects.
6 *
7 * Author(s): Stephen Smalley, <sds@tycho.nsa.gov>
8 * Chris Vance, <cvance@nai.com>
9 * Wayne Salamon, <wsalamon@nai.com>
10 * James Morris <jmorris@redhat.com>
11 *
12 * Copyright (C) 2001,2002 Networks Associates Technology, Inc.
13 * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
14 * Copyright (C) 2016 Mellanox Technologies
15 */
16#ifndef _SELINUX_OBJSEC_H_
17#define _SELINUX_OBJSEC_H_
18
19#include <linux/list.h>
20#include <linux/sched.h>
21#include <linux/fs.h>
22#include <linux/binfmts.h>
23#include <linux/in.h>
24#include <linux/spinlock.h>
25#include <linux/lsm_hooks.h>
26#include <linux/msg.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} __randomize_layout;
39
40enum label_initialized {
41 LABEL_INVALID, /* invalid or not initialized */
42 LABEL_INITIALIZED, /* initialized */
43 LABEL_PENDING
44};
45
46struct inode_security_struct {
47 struct inode *inode; /* back pointer to inode object */
48 struct list_head list; /* list of inode_security_struct */
49 u32 task_sid; /* SID of creating task */
50 u32 sid; /* SID of this object */
51 u16 sclass; /* security class of this object */
52 unsigned char initialized; /* initialization flag */
53 spinlock_t lock;
54};
55
56struct file_security_struct {
57 u32 sid; /* SID of open file description */
58 u32 fown_sid; /* SID of file owner (for SIGIO) */
59 u32 isid; /* SID of inode at the time of file open */
60 u32 pseqno; /* Policy seqno at the time of file open */
61};
62
63struct superblock_security_struct {
64 u32 sid; /* SID of file system superblock */
65 u32 def_sid; /* default SID for labeling */
66 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
67 unsigned short behavior; /* labeling behavior */
68 unsigned short flags; /* which mount options were specified */
69 struct mutex lock;
70 struct list_head isec_head;
71 spinlock_t isec_lock;
72};
73
74struct msg_security_struct {
75 u32 sid; /* SID of message */
76};
77
78struct ipc_security_struct {
79 u16 sclass; /* security class of this object */
80 u32 sid; /* SID of IPC resource */
81};
82
83struct netif_security_struct {
84 struct net *ns; /* network namespace */
85 int ifindex; /* device index */
86 u32 sid; /* SID for this interface */
87};
88
89struct netnode_security_struct {
90 union {
91 __be32 ipv4; /* IPv4 node address */
92 struct in6_addr ipv6; /* IPv6 node address */
93 } addr;
94 u32 sid; /* SID for this node */
95 u16 family; /* address family */
96};
97
98struct netport_security_struct {
99 u32 sid; /* SID for this node */
100 u16 port; /* port number */
101 u8 protocol; /* transport protocol */
102};
103
104struct sk_security_struct {
105#ifdef CONFIG_NETLABEL
106 enum { /* NetLabel state */
107 NLBL_UNSET = 0,
108 NLBL_REQUIRE,
109 NLBL_LABELED,
110 NLBL_REQSKB,
111 NLBL_CONNLABELED,
112 } nlbl_state;
113 struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */
114#endif
115 u32 sid; /* SID of this object */
116 u32 peer_sid; /* SID of peer */
117 u16 sclass; /* sock security class */
118 enum { /* SCTP association state */
119 SCTP_ASSOC_UNSET = 0,
120 SCTP_ASSOC_SET,
121 } sctp_assoc_state;
122};
123
124struct tun_security_struct {
125 u32 sid; /* SID for the tun device sockets */
126};
127
128struct key_security_struct {
129 u32 sid; /* SID of key */
130};
131
132struct ib_security_struct {
133 u32 sid; /* SID of the queue pair or MAD agent */
134};
135
136struct pkey_security_struct {
137 u64 subnet_prefix; /* Port subnet prefix */
138 u16 pkey; /* PKey number */
139 u32 sid; /* SID of pkey */
140};
141
142struct bpf_security_struct {
143 u32 sid; /* SID of bpf obj creator */
144};
145
146struct perf_event_security_struct {
147 u32 sid; /* SID of perf_event obj creator */
148};
149
150extern struct lsm_blob_sizes selinux_blob_sizes;
151static inline struct task_security_struct *selinux_cred(const struct cred *cred)
152{
153 return cred->security + selinux_blob_sizes.lbs_cred;
154}
155
156static inline struct file_security_struct *selinux_file(const struct file *file)
157{
158 return file->f_security + selinux_blob_sizes.lbs_file;
159}
160
161static inline struct inode_security_struct *selinux_inode(
162 const struct inode *inode)
163{
164 if (unlikely(!inode->i_security))
165 return NULL;
166 return inode->i_security + selinux_blob_sizes.lbs_inode;
167}
168
169static inline struct msg_security_struct *selinux_msg_msg(
170 const struct msg_msg *msg_msg)
171{
172 return msg_msg->security + selinux_blob_sizes.lbs_msg_msg;
173}
174
175static inline struct ipc_security_struct *selinux_ipc(
176 const struct kern_ipc_perm *ipc)
177{
178 return ipc->security + selinux_blob_sizes.lbs_ipc;
179}
180
181/*
182 * get the subjective security ID of the current task
183 */
184static inline u32 current_sid(void)
185{
186 const struct task_security_struct *tsec = selinux_cred(current_cred());
187
188 return tsec->sid;
189}
190
191static inline struct superblock_security_struct *selinux_superblock(
192 const struct super_block *superblock)
193{
194 return superblock->s_security + selinux_blob_sizes.lbs_superblock;
195}
196
197#endif /* _SELINUX_OBJSEC_H_ */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Security-Enhanced Linux (SELinux) security module
4 *
5 * This file contains the SELinux security data structures for kernel objects.
6 *
7 * Author(s): Stephen Smalley, <stephen.smalley.work@gmail.com>
8 * Chris Vance, <cvance@nai.com>
9 * Wayne Salamon, <wsalamon@nai.com>
10 * James Morris <jmorris@redhat.com>
11 *
12 * Copyright (C) 2001,2002 Networks Associates Technology, Inc.
13 * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
14 * Copyright (C) 2016 Mellanox Technologies
15 */
16
17#ifndef _SELINUX_OBJSEC_H_
18#define _SELINUX_OBJSEC_H_
19
20#include <linux/list.h>
21#include <linux/sched.h>
22#include <linux/fs.h>
23#include <linux/binfmts.h>
24#include <linux/in.h>
25#include <linux/spinlock.h>
26#include <linux/lsm_hooks.h>
27#include <linux/msg.h>
28#include <net/net_namespace.h>
29#include "flask.h"
30#include "avc.h"
31
32struct task_security_struct {
33 u32 osid; /* SID prior to last execve */
34 u32 sid; /* current SID */
35 u32 exec_sid; /* exec SID */
36 u32 create_sid; /* fscreate SID */
37 u32 keycreate_sid; /* keycreate SID */
38 u32 sockcreate_sid; /* fscreate SID */
39} __randomize_layout;
40
41enum label_initialized {
42 LABEL_INVALID, /* invalid or not initialized */
43 LABEL_INITIALIZED, /* initialized */
44 LABEL_PENDING
45};
46
47struct inode_security_struct {
48 struct inode *inode; /* back pointer to inode object */
49 struct list_head list; /* list of inode_security_struct */
50 u32 task_sid; /* SID of creating task */
51 u32 sid; /* SID of this object */
52 u16 sclass; /* security class of this object */
53 unsigned char initialized; /* initialization flag */
54 spinlock_t lock;
55};
56
57struct file_security_struct {
58 u32 sid; /* SID of open file description */
59 u32 fown_sid; /* SID of file owner (for SIGIO) */
60 u32 isid; /* SID of inode at the time of file open */
61 u32 pseqno; /* Policy seqno at the time of file open */
62};
63
64struct superblock_security_struct {
65 u32 sid; /* SID of file system superblock */
66 u32 def_sid; /* default SID for labeling */
67 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
68 unsigned short behavior; /* labeling behavior */
69 unsigned short flags; /* which mount options were specified */
70 struct mutex lock;
71 struct list_head isec_head;
72 spinlock_t isec_lock;
73};
74
75struct msg_security_struct {
76 u32 sid; /* SID of message */
77};
78
79struct ipc_security_struct {
80 u16 sclass; /* security class of this object */
81 u32 sid; /* SID of IPC resource */
82};
83
84struct netif_security_struct {
85 struct net *ns; /* network namespace */
86 int ifindex; /* device index */
87 u32 sid; /* SID for this interface */
88};
89
90struct netnode_security_struct {
91 union {
92 __be32 ipv4; /* IPv4 node address */
93 struct in6_addr ipv6; /* IPv6 node address */
94 } addr;
95 u32 sid; /* SID for this node */
96 u16 family; /* address family */
97};
98
99struct netport_security_struct {
100 u32 sid; /* SID for this node */
101 u16 port; /* port number */
102 u8 protocol; /* transport protocol */
103};
104
105struct sk_security_struct {
106#ifdef CONFIG_NETLABEL
107 enum { /* NetLabel state */
108 NLBL_UNSET = 0,
109 NLBL_REQUIRE,
110 NLBL_LABELED,
111 NLBL_REQSKB,
112 NLBL_CONNLABELED,
113 } nlbl_state;
114 struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */
115#endif
116 u32 sid; /* SID of this object */
117 u32 peer_sid; /* SID of peer */
118 u16 sclass; /* sock security class */
119 enum { /* SCTP association state */
120 SCTP_ASSOC_UNSET = 0,
121 SCTP_ASSOC_SET,
122 } sctp_assoc_state;
123};
124
125struct tun_security_struct {
126 u32 sid; /* SID for the tun device sockets */
127};
128
129struct key_security_struct {
130 u32 sid; /* SID of key */
131};
132
133struct ib_security_struct {
134 u32 sid; /* SID of the queue pair or MAD agent */
135};
136
137struct pkey_security_struct {
138 u64 subnet_prefix; /* Port subnet prefix */
139 u16 pkey; /* PKey number */
140 u32 sid; /* SID of pkey */
141};
142
143struct bpf_security_struct {
144 u32 sid; /* SID of bpf obj creator */
145};
146
147struct perf_event_security_struct {
148 u32 sid; /* SID of perf_event obj creator */
149};
150
151extern struct lsm_blob_sizes selinux_blob_sizes;
152static inline struct task_security_struct *selinux_cred(const struct cred *cred)
153{
154 return cred->security + selinux_blob_sizes.lbs_cred;
155}
156
157static inline struct file_security_struct *selinux_file(const struct file *file)
158{
159 return file->f_security + selinux_blob_sizes.lbs_file;
160}
161
162static inline struct inode_security_struct *
163selinux_inode(const struct inode *inode)
164{
165 if (unlikely(!inode->i_security))
166 return NULL;
167 return inode->i_security + selinux_blob_sizes.lbs_inode;
168}
169
170static inline struct msg_security_struct *
171selinux_msg_msg(const struct msg_msg *msg_msg)
172{
173 return msg_msg->security + selinux_blob_sizes.lbs_msg_msg;
174}
175
176static inline struct ipc_security_struct *
177selinux_ipc(const struct kern_ipc_perm *ipc)
178{
179 return ipc->security + selinux_blob_sizes.lbs_ipc;
180}
181
182/*
183 * get the subjective security ID of the current task
184 */
185static inline u32 current_sid(void)
186{
187 const struct task_security_struct *tsec = selinux_cred(current_cred());
188
189 return tsec->sid;
190}
191
192static inline struct superblock_security_struct *
193selinux_superblock(const struct super_block *superblock)
194{
195 return superblock->s_security + selinux_blob_sizes.lbs_superblock;
196}
197
198#ifdef CONFIG_KEYS
199static inline struct key_security_struct *selinux_key(const struct key *key)
200{
201 return key->security + selinux_blob_sizes.lbs_key;
202}
203#endif /* CONFIG_KEYS */
204
205static inline struct sk_security_struct *selinux_sock(const struct sock *sock)
206{
207 return sock->sk_security + selinux_blob_sizes.lbs_sock;
208}
209
210static inline struct tun_security_struct *selinux_tun_dev(void *security)
211{
212 return security + selinux_blob_sizes.lbs_tun_dev;
213}
214
215static inline struct ib_security_struct *selinux_ib(void *ib_sec)
216{
217 return ib_sec + selinux_blob_sizes.lbs_ib;
218}
219
220static inline struct perf_event_security_struct *
221selinux_perf_event(void *perf_event)
222{
223 return perf_event + selinux_blob_sizes.lbs_perf_event;
224}
225
226#endif /* _SELINUX_OBJSEC_H_ */