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_ */ 103 104