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/in6.h> 16 #include <asm/system.h> 17 #include "flask.h" 18 #include "av_permissions.h" 19 #include "security.h" 20 21 #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 22 extern int selinux_enforcing; 23 #else 24 #define selinux_enforcing 1 25 #endif 26 27 /* 28 * An entry in the AVC. 29 */ 30 struct avc_entry; 31 32 struct task_struct; 33 struct vfsmount; 34 struct dentry; 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 vfsmount *mnt; 50 struct dentry *dentry; 51 struct inode *inode; 52 } fs; 53 struct { 54 char *netif; 55 struct sock *sk; 56 u16 family; 57 __be16 dport; 58 __be16 sport; 59 union { 60 struct { 61 __be32 daddr; 62 __be32 saddr; 63 } v4; 64 struct { 65 struct in6_addr daddr; 66 struct in6_addr saddr; 67 } v6; 68 } fam; 69 } net; 70 int cap; 71 int ipc_id; 72 } u; 73 }; 74 75 #define v4info fam.v4 76 #define v6info fam.v6 77 78 /* Initialize an AVC audit data structure. */ 79 #define AVC_AUDIT_DATA_INIT(_d,_t) \ 80 { memset((_d), 0, sizeof(struct avc_audit_data)); (_d)->type = AVC_AUDIT_DATA_##_t; } 81 82 /* 83 * AVC statistics 84 */ 85 struct avc_cache_stats 86 { 87 unsigned int lookups; 88 unsigned int hits; 89 unsigned int misses; 90 unsigned int allocations; 91 unsigned int reclaims; 92 unsigned int frees; 93 }; 94 95 /* 96 * AVC operations 97 */ 98 99 void __init avc_init(void); 100 101 void avc_audit(u32 ssid, u32 tsid, 102 u16 tclass, u32 requested, 103 struct av_decision *avd, int result, struct avc_audit_data *auditdata); 104 105 #define AVC_STRICT 1 /* Ignore permissive mode. */ 106 int avc_has_perm_noaudit(u32 ssid, u32 tsid, 107 u16 tclass, u32 requested, 108 unsigned flags, 109 struct av_decision *avd); 110 111 int avc_has_perm(u32 ssid, u32 tsid, 112 u16 tclass, u32 requested, 113 struct avc_audit_data *auditdata); 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 /* Exported to selinuxfs */ 131 int avc_get_hash_stats(char *page); 132 extern unsigned int avc_cache_threshold; 133 134 #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 135 DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats); 136 #endif 137 138 #endif /* _SELINUX_AVC_H_ */ 139 140