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/in6.h> 17 #include <linux/path.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 24 extern int selinux_enforcing; 25 #else 26 #define selinux_enforcing 1 27 #endif 28 29 /* 30 * An entry in the AVC. 31 */ 32 struct avc_entry; 33 34 struct task_struct; 35 struct inode; 36 struct sock; 37 struct sk_buff; 38 39 /* Auxiliary data to use in generating the audit record. */ 40 struct avc_audit_data { 41 char type; 42 #define AVC_AUDIT_DATA_FS 1 43 #define AVC_AUDIT_DATA_NET 2 44 #define AVC_AUDIT_DATA_CAP 3 45 #define AVC_AUDIT_DATA_IPC 4 46 struct task_struct *tsk; 47 union { 48 struct { 49 struct path path; 50 struct inode *inode; 51 } fs; 52 struct { 53 int netif; 54 struct sock *sk; 55 u16 family; 56 __be16 dport; 57 __be16 sport; 58 union { 59 struct { 60 __be32 daddr; 61 __be32 saddr; 62 } v4; 63 struct { 64 struct in6_addr daddr; 65 struct in6_addr saddr; 66 } v6; 67 } fam; 68 } net; 69 int cap; 70 int ipc_id; 71 } u; 72 }; 73 74 #define v4info fam.v4 75 #define v6info fam.v6 76 77 /* Initialize an AVC audit data structure. */ 78 #define AVC_AUDIT_DATA_INIT(_d,_t) \ 79 { memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; } 80 81 /* 82 * AVC statistics 83 */ 84 struct avc_cache_stats { 85 unsigned int lookups; 86 unsigned int hits; 87 unsigned int misses; 88 unsigned int allocations; 89 unsigned int reclaims; 90 unsigned int frees; 91 }; 92 93 /* 94 * AVC operations 95 */ 96 97 void __init avc_init(void); 98 99 void avc_audit(u32 ssid, u32 tsid, 100 u16 tclass, u32 requested, 101 struct av_decision *avd, int result, struct avc_audit_data *auditdata); 102 103 #define AVC_STRICT 1 /* Ignore permissive mode. */ 104 int avc_has_perm_noaudit(u32 ssid, u32 tsid, 105 u16 tclass, u32 requested, 106 unsigned flags, 107 struct av_decision *avd); 108 109 int avc_has_perm(u32 ssid, u32 tsid, 110 u16 tclass, u32 requested, 111 struct avc_audit_data *auditdata); 112 113 u32 avc_policy_seqno(void); 114 115 #define AVC_CALLBACK_GRANT 1 116 #define AVC_CALLBACK_TRY_REVOKE 2 117 #define AVC_CALLBACK_REVOKE 4 118 #define AVC_CALLBACK_RESET 8 119 #define AVC_CALLBACK_AUDITALLOW_ENABLE 16 120 #define AVC_CALLBACK_AUDITALLOW_DISABLE 32 121 #define AVC_CALLBACK_AUDITDENY_ENABLE 64 122 #define AVC_CALLBACK_AUDITDENY_DISABLE 128 123 124 int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid, 125 u16 tclass, u32 perms, 126 u32 *out_retained), 127 u32 events, u32 ssid, u32 tsid, 128 u16 tclass, u32 perms); 129 130 /* Shows permission in human readable form */ 131 void avc_dump_av(struct audit_buffer *ab, u16 tclass, u32 av); 132 133 /* Exported to selinuxfs */ 134 int avc_get_hash_stats(char *page); 135 extern unsigned int avc_cache_threshold; 136 137 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 138 DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats); 139 #endif 140 141 #endif /* _SELINUX_AVC_H_ */ 142 143