security/selinux/avc.c

48 	u32			ssid;
125 static inline u32 avc_hash(u32 ssid, u32 tsid, u16 tclass)
127 	return (ssid ^ (tsid<<2) ^ (tclass<<4)) & (AVC_CACHE_SLOTS - 1);
415 static inline int avc_xperms_audit(u32 ssid, u32 tsid, u16 tclass,
427 	return slow_avc_audit(ssid, tsid, tclass, requested,
515 static void avc_node_populate(struct avc_node *node, u32 ssid, u32 tsid, u16 tclass, struct av_decision *avd)
517 	node->ae.ssid = ssid;
523 static inline struct avc_node *avc_search_node(u32 ssid, u32 tsid, u16 tclass)
529 	hvalue = avc_hash(ssid, tsid, tclass);
532 		if (ssid == node->ae.ssid &&
545  * @ssid: source security identifier
550  * (@ssid, @tsid), interpreting the permissions
555 static struct avc_node *avc_lookup(u32 ssid, u32 tsid, u16 tclass)
560 	node = avc_search_node(ssid, tsid, tclass);
593  * @ssid: source security identifier
600  * (@ssid, @tsid) and class @tclass.
608 static void avc_insert(u32 ssid, u32 tsid, u16 tclass,
624 	avc_node_populate(node, ssid, tsid, tclass, avd);
630 	hvalue = avc_hash(ssid, tsid, tclass);
635 		if (pos->ae.ssid == ssid &&
705 	rc = security_sid_to_context(sad->ssid, &scontext,
708 		audit_log_format(ab, " ssid=%d", sad->ssid);
730 	rc = security_sid_to_context_inval(sad->ssid, &scontext,
756 noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
773 	sad.ssid = ssid;
819  * @ssid: AVC entry source sid
831 static int avc_update_node(u32 event, u32 perms, u8 driver, u8 xperm, u32 ssid,
850 	hvalue = avc_hash(ssid, tsid, tclass);
858 		if (ssid == pos->ae.ssid &&
877 	avc_node_populate(node, ssid, tsid, tclass, &orig->ae.avd);
975  * @ssid: subject
985 static noinline void avc_compute_av(u32 ssid, u32 tsid, u16 tclass,
990 	security_compute_av(ssid, tsid, tclass, avd, &xp_node->xp);
991 	avc_insert(ssid, tsid, tclass, avd, xp_node);
994 static noinline int avc_denied(u32 ssid, u32 tsid,
1007 			xperm, ssid, tsid, tclass, avd->seqno, NULL, flags);
1018 int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested,
1039 	node = avc_lookup(ssid, tsid, tclass);
1041 		avc_compute_av(ssid, tsid, tclass, &avd, xp_node);
1065 		security_compute_xperms_decision(ssid, tsid, tclass,
1069 				driver, xperm, ssid, tsid, tclass, avd.seqno,
1082 		rc = avc_denied(ssid, tsid, tclass, requested,
1087 	rc2 = avc_xperms_audit(ssid, tsid, tclass, requested,
1096  * @ssid: subject
1107 static noinline int avc_perm_nonode(u32 ssid, u32 tsid, u16 tclass,
1114 	avc_compute_av(ssid, tsid, tclass, avd, &xp_node);
1117 		return avc_denied(ssid, tsid, tclass, requested, 0, 0,
1124  * @ssid: source security identifier
1132  * for the SID pair (@ssid, @tsid), interpreting the permissions
1142 inline int avc_has_perm_noaudit(u32 ssid, u32 tsid,
1154 	node = avc_lookup(ssid, tsid, tclass);
1157 		return avc_perm_nonode(ssid, tsid, tclass, requested,
1165 		return avc_denied(ssid, tsid, tclass, requested, 0, 0,
1172  * @ssid: source security identifier
1179  * for the SID pair (@ssid, @tsid), interpreting the permissions
1186 int avc_has_perm(u32 ssid, u32 tsid, u16 tclass,
1192 	rc = avc_has_perm_noaudit(ssid, tsid, tclass, requested, 0,
1195 	rc2 = avc_audit(ssid, tsid, tclass, requested, &avd, rc,