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
  25 extern int selinux_enforcing;
  26 #else
  27 #define selinux_enforcing 1
  28 #endif
  29
  30 /*
  31  * An entry in the AVC.
  32  */
  33 struct avc_entry;
  34
  35 struct task_struct;
  36 struct inode;
  37 struct sock;
  38 struct sk_buff;
  39
  40 /*
  41  * AVC statistics
  42  */
  43 struct 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
  56 void __init avc_init(void);
  57
  58 void 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. */
  65 int avc_has_perm_noaudit(u32 ssid, u32 tsid,
  66                          u16 tclass, u32 requested,
  67                          unsigned flags,
  68                          struct av_decision *avd);
  69
  70 int avc_has_perm(u32 ssid, u32 tsid,
  71                  u16 tclass, u32 requested,
  72                  struct common_audit_data *auditdata);
  73
  74 u32 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
  85 int 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 */
  92 int avc_get_hash_stats(char *page);
  93 extern unsigned int avc_cache_threshold;
  94
  95 /* Attempt to free avc node cache */
  96 void avc_disable(void);
  97
  98 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS
  99 DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats);
 100 #endif
 101
 102 #endif /* _SELINUX_AVC_H_ */
 103