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name : lsm_audit.h
 /* SPDX-License-Identifier: GPL-2.0 */
/*
 * Common LSM logging functions
 * Heavily borrowed from selinux/avc.h
 *
 * Author : Etienne BASSET  <etienne.basset@ensta.org>
 *
 * All credits to : Stephen Smalley, <sds@tycho.nsa.gov>
 * All BUGS to : Etienne BASSET  <etienne.basset@ensta.org>
 */
#ifndef _LSM_COMMON_LOGGING_
#define _LSM_COMMON_LOGGING_

#include <linux/stddef.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kdev_t.h>
#include <linux/spinlock.h>
#include <linux/init.h>
#include <linux/audit.h>
#include <linux/in6.h>
#include <linux/path.h>
#include <linux/key.h>
#include <linux/skbuff.h>
#include <rdma/ib_verbs.h>

struct lsm_network_audit {
	int netif;
	const struct sock *sk;
	u16 family;
	__be16 dport;
	__be16 sport;
	union {
		struct {
			__be32 daddr;
			__be32 saddr;
		} v4;
		struct {
			struct in6_addr daddr;
			struct in6_addr saddr;
		} v6;
	} fam;
};

struct lsm_ioctlop_audit {
	struct path path;
	u16 cmd;
};

struct lsm_ibpkey_audit {
	u64 subnet_prefix;
	u16 pkey;
};

struct lsm_ibendport_audit {
	const char *dev_name;
	u8 port;
};

/* Auxiliary data to use in generating the audit record. */
struct common_audit_data {
	char type;
#define LSM_AUDIT_DATA_PATH	1
#define LSM_AUDIT_DATA_NET	2
#define LSM_AUDIT_DATA_CAP	3
#define LSM_AUDIT_DATA_IPC	4
#define LSM_AUDIT_DATA_TASK	5
#define LSM_AUDIT_DATA_KEY	6
#define LSM_AUDIT_DATA_NONE	7
#define LSM_AUDIT_DATA_KMOD	8
#define LSM_AUDIT_DATA_INODE	9
#define LSM_AUDIT_DATA_DENTRY	10
#define LSM_AUDIT_DATA_IOCTL_OP	11
#define LSM_AUDIT_DATA_FILE	12
#define LSM_AUDIT_DATA_IBPKEY	13
#define LSM_AUDIT_DATA_IBENDPORT 14
#define LSM_AUDIT_DATA_LOCKDOWN 15
#define LSM_AUDIT_DATA_NOTIFICATION 16
#define LSM_AUDIT_DATA_ANONINODE	17
	union 	{
		struct path path;
		struct dentry *dentry;
		struct inode *inode;
		struct lsm_network_audit *net;
		int cap;
		int ipc_id;
		struct task_struct *tsk;
#ifdef CONFIG_KEYS
		struct {
			key_serial_t key;
			char *key_desc;
		} key_struct;
#endif
		char *kmod_name;
		struct lsm_ioctlop_audit *op;
		struct file *file;
		struct lsm_ibpkey_audit *ibpkey;
		struct lsm_ibendport_audit *ibendport;
		int reason;
		const char *anonclass;
	} u;
	/* this union contains LSM specific data */
	union {
#ifdef CONFIG_SECURITY_SMACK
		struct smack_audit_data *smack_audit_data;
#endif
#ifdef CONFIG_SECURITY_SELINUX
		struct selinux_audit_data *selinux_audit_data;
#endif
#ifdef CONFIG_SECURITY_APPARMOR
		struct apparmor_audit_data *apparmor_audit_data;
#endif
	}; /* per LSM data pointer union */
};

#define v4info fam.v4
#define v6info fam.v6

int ipv4_skb_to_auditdata(struct sk_buff *skb,
		struct common_audit_data *ad, u8 *proto);

int ipv6_skb_to_auditdata(struct sk_buff *skb,
		struct common_audit_data *ad, u8 *proto);

void common_lsm_audit(struct common_audit_data *a,
	void (*pre_audit)(struct audit_buffer *, void *),
	void (*post_audit)(struct audit_buffer *, void *));

#endif
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