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 <linux/path.h>
  19#include <asm/system.h>
  20#include "flask.h"
  21#include "av_permissions.h"
  22#include "security.h"
  23
  24#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
  25extern int selinux_enforcing;
  26#else
  27#define selinux_enforcing 1
  28#endif
  29
  30/*
  31 * An entry in the AVC.
  32 */
  33struct avc_entry;
  34
  35struct task_struct;
  36struct inode;
  37struct sock;
  38struct sk_buff;
  39
  40/*
  41 * AVC statistics
  42 */
  43struct avc_cache_stats {
  44        unsigned int lookups;
  45        unsigned int hits;
  46        unsigned int misses;
  47        unsigned int allocations;
  48        unsigned int reclaims;
  49        unsigned int frees;
  50};
  51
  52/*
  53 * AVC operations
  54 */
  55
  56void __init avc_init(void);
  57
  58void avc_audit(u32 ssid, u32 tsid,
  59               u16 tclass, u32 requested,
  60               struct av_decision *avd,
  61               int result,
  62               struct common_audit_data *a);
  63
  64#define AVC_STRICT 1 /* Ignore permissive mode. */
  65int avc_has_perm_noaudit(u32 ssid, u32 tsid,
  66                         u16 tclass, u32 requested,
  67                         unsigned flags,
  68                         struct av_decision *avd);
  69
  70int avc_has_perm(u32 ssid, u32 tsid,
  71                 u16 tclass, u32 requested,
  72                 struct common_audit_data *auditdata);
  73
  74u32 avc_policy_seqno(void);
  75
  76#define AVC_CALLBACK_GRANT              1
  77#define AVC_CALLBACK_TRY_REVOKE         2
  78#define AVC_CALLBACK_REVOKE             4
  79#define AVC_CALLBACK_RESET              8
  80#define AVC_CALLBACK_AUDITALLOW_ENABLE  16
  81#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
  82#define AVC_CALLBACK_AUDITDENY_ENABLE   64
  83#define AVC_CALLBACK_AUDITDENY_DISABLE  128
  84
  85int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
  86                                     u16 tclass, u32 perms,
  87                                     u32 *out_retained),
  88                     u32 events, u32 ssid, u32 tsid,
  89                     u16 tclass, u32 perms);
  90
  91/* Exported to selinuxfs */
  92int avc_get_hash_stats(char *page);
  93extern unsigned int avc_cache_threshold;
  94
  95/* Attempt to free avc node cache */
  96void avc_disable(void);
  97
  98#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
  99DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 100#endif
 101
 102#endif /* _SELINUX_AVC_H_ */
 103
 104