LXR linux/security/selinux/include/avc.h

   1/*
   2 * Access vector cache interface for object managers.
   3 *
   4 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
   5 */
   6#ifndef _SELINUX_AVC_H_
   7#define _SELINUX_AVC_H_
   8
   9#include <linux/stddef.h>
  10#include <linux/errno.h>
  11#include <linux/kernel.h>
  12#include <linux/kdev_t.h>
  13#include <linux/spinlock.h>
  14#include <linux/init.h>
  15#include <linux/audit.h>
  16#include <linux/lsm_audit.h>
  17#include <linux/in6.h>
  18#include <asm/system.h>
  19#include "flask.h"
  20#include "av_permissions.h"
  21#include "security.h"
  22
  23#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
  24extern int selinux_enforcing;
  25#else
  26#define selinux_enforcing 1
  27#endif
  28
  29/*
  30 * An entry in the AVC.
  31 */
  32struct avc_entry;
  33
  34struct task_struct;
  35struct inode;
  36struct sock;
  37struct sk_buff;
  38
  39/*
  40 * AVC statistics
  41 */
  42struct avc_cache_stats {
  43        unsigned int lookups;
  44        unsigned int hits;
  45        unsigned int misses;
  46        unsigned int allocations;
  47        unsigned int reclaims;
  48        unsigned int frees;
  49};
  50
  51/*
  52 * AVC operations
  53 */
  54
  55void __init avc_init(void);
  56
  57void avc_audit(u32 ssid, u32 tsid,
  58               u16 tclass, u32 requested,
  59               struct av_decision *avd,
  60               int result,
  61               struct common_audit_data *a);
  62
  63#define AVC_STRICT 1 /* Ignore permissive mode. */
  64int avc_has_perm_noaudit(u32 ssid, u32 tsid,
  65                         u16 tclass, u32 requested,
  66                         unsigned flags,
  67                         struct av_decision *avd);
  68
  69int avc_has_perm(u32 ssid, u32 tsid,
  70                 u16 tclass, u32 requested,
  71                 struct common_audit_data *auditdata);
  72
  73u32 avc_policy_seqno(void);
  74
  75#define AVC_CALLBACK_GRANT              1
  76#define AVC_CALLBACK_TRY_REVOKE         2
  77#define AVC_CALLBACK_REVOKE             4
  78#define AVC_CALLBACK_RESET              8
  79#define AVC_CALLBACK_AUDITALLOW_ENABLE  16
  80#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
  81#define AVC_CALLBACK_AUDITDENY_ENABLE   64
  82#define AVC_CALLBACK_AUDITDENY_DISABLE  128
  83
  84int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
  85                                     u16 tclass, u32 perms,
  86                                     u32 *out_retained),
  87                     u32 events, u32 ssid, u32 tsid,
  88                     u16 tclass, u32 perms);
  89
  90/* Exported to selinuxfs */
  91int avc_get_hash_stats(char *page);
  92extern unsigned int avc_cache_threshold;
  93
  94/* Attempt to free avc node cache */
  95void avc_disable(void);
  96
  97#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
  98DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
  99#endif
 100
 101#endif /* _SELINUX_AVC_H_ */
 102
 103