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 misses;
  45        unsigned int allocations;
  46        unsigned int reclaims;
  47        unsigned int frees;
  48};
  49
  50/*
  51 * AVC operations
  52 */
  53
  54void __init avc_init(void);
  55
  56int avc_audit(u32 ssid, u32 tsid,
  57               u16 tclass, u32 requested,
  58               struct av_decision *avd,
  59               int result,
  60              struct common_audit_data *a, unsigned flags);
  61
  62#define AVC_STRICT 1 /* Ignore permissive mode. */
  63int avc_has_perm_noaudit(u32 ssid, u32 tsid,
  64                         u16 tclass, u32 requested,
  65                         unsigned flags,
  66                         struct av_decision *avd);
  67
  68int avc_has_perm_flags(u32 ssid, u32 tsid,
  69                       u16 tclass, u32 requested,
  70                       struct common_audit_data *auditdata,
  71                       unsigned);
  72
  73static inline int avc_has_perm(u32 ssid, u32 tsid,
  74                               u16 tclass, u32 requested,
  75                               struct common_audit_data *auditdata)
  76{
  77        return avc_has_perm_flags(ssid, tsid, tclass, requested, auditdata, 0);
  78}
  79
  80u32 avc_policy_seqno(void);
  81
  82#define AVC_CALLBACK_GRANT              1
  83#define AVC_CALLBACK_TRY_REVOKE         2
  84#define AVC_CALLBACK_REVOKE             4
  85#define AVC_CALLBACK_RESET              8
  86#define AVC_CALLBACK_AUDITALLOW_ENABLE  16
  87#define AVC_CALLBACK_AUDITALLOW_DISABLE 32
  88#define AVC_CALLBACK_AUDITDENY_ENABLE   64
  89#define AVC_CALLBACK_AUDITDENY_DISABLE  128
  90
  91int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
  92                                     u16 tclass, u32 perms,
  93                                     u32 *out_retained),
  94                     u32 events, u32 ssid, u32 tsid,
  95                     u16 tclass, u32 perms);
  96
  97/* Exported to selinuxfs */
  98int avc_get_hash_stats(char *page);
  99extern unsigned int avc_cache_threshold;
 100
 101/* Attempt to free avc node cache */
 102void avc_disable(void);
 103
 104#ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
 105DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 106#endif
 107
 108#endif /* _SELINUX_AVC_H_ */
 109
 110