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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Common LSM logging functions
4 * Heavily borrowed from selinux/avc.h
5 *
6 * Author : Etienne BASSET <etienne.basset@ensta.org>
7 *
8 * All credits to : Stephen Smalley
9 * All BUGS to : Etienne BASSET <etienne.basset@ensta.org>
10 */
11#ifndef _LSM_COMMON_LOGGING_
12#define _LSM_COMMON_LOGGING_
13
14#include <linux/stddef.h>
15#include <linux/errno.h>
16#include <linux/kernel.h>
17#include <linux/kdev_t.h>
18#include <linux/spinlock.h>
19#include <linux/init.h>
20#include <linux/audit.h>
21#include <linux/in6.h>
22#include <linux/path.h>
23#include <linux/key.h>
24#include <linux/skbuff.h>
25#include <rdma/ib_verbs.h>
26
27struct lsm_network_audit {
28 int netif;
29 const struct sock *sk;
30 u16 family;
31 __be16 dport;
32 __be16 sport;
33 union {
34 struct {
35 __be32 daddr;
36 __be32 saddr;
37 } v4;
38 struct {
39 struct in6_addr daddr;
40 struct in6_addr saddr;
41 } v6;
42 } fam;
43};
44
45struct lsm_ioctlop_audit {
46 struct path path;
47 u16 cmd;
48};
49
50struct lsm_ibpkey_audit {
51 u64 subnet_prefix;
52 u16 pkey;
53};
54
55struct lsm_ibendport_audit {
56 const char *dev_name;
57 u8 port;
58};
59
60/* Auxiliary data to use in generating the audit record. */
61struct common_audit_data {
62 char type;
63#define LSM_AUDIT_DATA_PATH 1
64#define LSM_AUDIT_DATA_NET 2
65#define LSM_AUDIT_DATA_CAP 3
66#define LSM_AUDIT_DATA_IPC 4
67#define LSM_AUDIT_DATA_TASK 5
68#define LSM_AUDIT_DATA_KEY 6
69#define LSM_AUDIT_DATA_NONE 7
70#define LSM_AUDIT_DATA_KMOD 8
71#define LSM_AUDIT_DATA_INODE 9
72#define LSM_AUDIT_DATA_DENTRY 10
73#define LSM_AUDIT_DATA_IOCTL_OP 11
74#define LSM_AUDIT_DATA_FILE 12
75#define LSM_AUDIT_DATA_IBPKEY 13
76#define LSM_AUDIT_DATA_IBENDPORT 14
77#define LSM_AUDIT_DATA_LOCKDOWN 15
78#define LSM_AUDIT_DATA_NOTIFICATION 16
79#define LSM_AUDIT_DATA_ANONINODE 17
80#define LSM_AUDIT_DATA_NLMSGTYPE 18
81 union {
82 struct path path;
83 struct dentry *dentry;
84 struct inode *inode;
85 struct lsm_network_audit *net;
86 int cap;
87 int ipc_id;
88 struct task_struct *tsk;
89#ifdef CONFIG_KEYS
90 struct {
91 key_serial_t key;
92 char *key_desc;
93 } key_struct;
94#endif
95 char *kmod_name;
96 struct lsm_ioctlop_audit *op;
97 struct file *file;
98 struct lsm_ibpkey_audit *ibpkey;
99 struct lsm_ibendport_audit *ibendport;
100 int reason;
101 const char *anonclass;
102 u16 nlmsg_type;
103 } u;
104 /* this union contains LSM specific data */
105 union {
106#ifdef CONFIG_SECURITY_SMACK
107 struct smack_audit_data *smack_audit_data;
108#endif
109#ifdef CONFIG_SECURITY_SELINUX
110 struct selinux_audit_data *selinux_audit_data;
111#endif
112#ifdef CONFIG_SECURITY_APPARMOR
113 struct apparmor_audit_data *apparmor_audit_data;
114#endif
115 }; /* per LSM data pointer union */
116};
117
118#define v4info fam.v4
119#define v6info fam.v6
120
121#ifdef CONFIG_AUDIT
122
123int ipv4_skb_to_auditdata(struct sk_buff *skb,
124 struct common_audit_data *ad, u8 *proto);
125
126#if IS_ENABLED(CONFIG_IPV6)
127int ipv6_skb_to_auditdata(struct sk_buff *skb,
128 struct common_audit_data *ad, u8 *proto);
129#endif /* IS_ENABLED(CONFIG_IPV6) */
130
131void common_lsm_audit(struct common_audit_data *a,
132 void (*pre_audit)(struct audit_buffer *, void *),
133 void (*post_audit)(struct audit_buffer *, void *));
134
135void audit_log_lsm_data(struct audit_buffer *ab,
136 const struct common_audit_data *a);
137
138#else /* CONFIG_AUDIT */
139
140static inline void common_lsm_audit(struct common_audit_data *a,
141 void (*pre_audit)(struct audit_buffer *, void *),
142 void (*post_audit)(struct audit_buffer *, void *))
143{
144}
145
146static inline void audit_log_lsm_data(struct audit_buffer *ab,
147 const struct common_audit_data *a)
148{
149}
150
151#endif /* CONFIG_AUDIT */
152
153#endif