include/linux/lsm_audit.h

   1 /*
   2  * Common LSM logging functions
   3  * Heavily borrowed from selinux/avc.h
   4  *
   5  * Author : Etienne BASSET  <etienne.basset@ensta.org>
   6  *
   7  * All credits to : Stephen Smalley, <sds@epoch.ncsc.mil>
   8  * All BUGS to : Etienne BASSET  <etienne.basset@ensta.org>
   9  */
  10 #ifndef _LSM_COMMON_LOGGING_
  11 #define _LSM_COMMON_LOGGING_
  12
  13 #include <linux/stddef.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/kdev_t.h>
  17 #include <linux/spinlock.h>
  18 #include <linux/init.h>
  19 #include <linux/audit.h>
  20 #include <linux/in6.h>
  21 #include <linux/path.h>
  22 #include <linux/key.h>
  23 #include <linux/skbuff.h>
  24 #include <asm/system.h>
  25
  26
  27 /* Auxiliary data to use in generating the audit record. */
  28 struct common_audit_data {
  29         char    type;
  30 #define LSM_AUDIT_DATA_FS      1
  31 #define LSM_AUDIT_DATA_NET     2
  32 #define LSM_AUDIT_DATA_CAP     3
  33 #define LSM_AUDIT_DATA_IPC     4
  34 #define LSM_AUDIT_DATA_TASK    5
  35 #define LSM_AUDIT_DATA_KEY     6
  36         struct task_struct *tsk;
  37         union   {
  38                 struct {
  39                         struct path path;
  40                         struct inode *inode;
  41                 } fs;
  42                 struct {
  43                         int netif;
  44                         struct sock *sk;
  45                         u16 family;
  46                         __be16 dport;
  47                         __be16 sport;
  48                         union {
  49                                 struct {
  50                                         __be32 daddr;
  51                                         __be32 saddr;
  52                                 } v4;
  53                                 struct {
  54                                         struct in6_addr daddr;
  55                                         struct in6_addr saddr;
  56                                 } v6;
  57                         } fam;
  58                 } net;
  59                 int cap;
  60                 int ipc_id;
  61                 struct task_struct *tsk;
  62 #ifdef CONFIG_KEYS
  63                 struct {
  64                         key_serial_t key;
  65                         char *key_desc;
  66                 } key_struct;
  67 #endif
  68         } u;
  69         const char *function;
  70         /* this union contains LSM specific data */
  71         union {
  72                 /* SMACK data */
  73                 struct smack_audit_data {
  74                         char *subject;
  75                         char *object;
  76                         char *request;
  77                         int result;
  78                 } smack_audit_data;
  79                 /* SELinux data */
  80                 struct {
  81                         u32 ssid;
  82                         u32 tsid;
  83                         u16 tclass;
  84                         u32 requested;
  85                         u32 audited;
  86                         struct av_decision *avd;
  87                         int result;
  88                 } selinux_audit_data;
  89         } lsm_priv;
  90         /* these callback will be implemented by a specific LSM */
  91         void (*lsm_pre_audit)(struct audit_buffer *, void *);
  92         void (*lsm_post_audit)(struct audit_buffer *, void *);
  93 };
  94
  95 #define v4info fam.v4
  96 #define v6info fam.v6
  97
  98 int ipv4_skb_to_auditdata(struct sk_buff *skb,
  99                 struct common_audit_data *ad, u8 *proto);
 100
 101 int ipv6_skb_to_auditdata(struct sk_buff *skb,
 102                 struct common_audit_data *ad, u8 *proto);
 103
 104 /* Initialize an LSM audit data structure. */
 105 #define COMMON_AUDIT_DATA_INIT(_d, _t) \
 106         { memset((_d), 0, sizeof(struct common_audit_data)); \
 107          (_d)->type = LSM_AUDIT_DATA_##_t; (_d)->function = __func__; }
 108
 109 void common_lsm_audit(struct common_audit_data *a);
 110
 111 #endif