SELinux: avc: remove the useless fields in avc_add_callback

avc_add_callback now just used for registering reset functions
in initcalls, and the callback functions just did reset operations.
So, reducing the arguments to only one event is enough now.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Eric Paris <eparis@redhat.com>

6 files changed, 15 insertions, 47 deletions

diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 5c1326e18836..68d82daed257 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -65,14 +65,8 @@ struct avc_cache {
 };
 
 struct avc_callback_node {
-        int (*callback) (u32 event, u32 ssid, u32 tsid,
-                         u16 tclass, u32 perms,
-                         u32 *out_retained);
+        int (*callback) (u32 event);
         u32 events;
-        u32 ssid;
-        u32 tsid;
-        u16 tclass;
-        u32 perms;
         struct avc_callback_node *next;
 };
 
@@ -499,22 +493,12 @@ noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
  * avc_add_callback - Register a callback for security events.
  * @callback: callback function
  * @events: security events
- * @ssid: source security identifier or %SECSID_WILD
- * @tsid: target security identifier or %SECSID_WILD
- * @tclass: target security class
- * @perms: permissions
  *
- * Register a callback function for events in the set @events
- * related to the SID pair (@ssid, @tsid) 
- * and the permissions @perms, interpreting
- * @perms based on @tclass.  Returns %0 on success or
- * -%ENOMEM if insufficient memory exists to add the callback.
+ * Register a callback function for events in the set @events.
+ * Returns %0 on success or -%ENOMEM if insufficient memory
+ * exists to add the callback.
  */
-int __init avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
-                                     u16 tclass, u32 perms,
-                                     u32 *out_retained),
-                     u32 events, u32 ssid, u32 tsid,
-                     u16 tclass, u32 perms)
+int __init avc_add_callback(int (*callback)(u32 event), u32 events)
 {
         struct avc_callback_node *c;
         int rc = 0;
@@ -527,9 +511,6 @@ int __init avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
 
         c->callback = callback;
         c->events = events;
-        c->ssid = ssid;
-        c->tsid = tsid;
-        c->perms = perms;
         c->next = avc_callbacks;
         avc_callbacks = c;
 out:
@@ -669,8 +650,7 @@ int avc_ss_reset(u32 seqno)
 
         for (c = avc_callbacks; c; c = c->next) {
                 if (c->events & AVC_CALLBACK_RESET) {
-                        tmprc = c->callback(AVC_CALLBACK_RESET,
-                                            0, 0, 0, 0, NULL);
+                        tmprc = c->callback(AVC_CALLBACK_RESET);
                         /* save the first error encountered for the return
                            value and continue processing the callbacks */
                         if (!rc)
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
index d97fadc4d963..92d0ab561db8 100644
--- a/security/selinux/include/avc.h
+++ b/security/selinux/include/avc.h
@@ -170,11 +170,7 @@ u32 avc_policy_seqno(void);
 #define AVC_CALLBACK_AUDITDENY_ENABLE   64
 #define AVC_CALLBACK_AUDITDENY_DISABLE  128
 
-int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
-                                     u16 tclass, u32 perms,
-                                     u32 *out_retained),
-                     u32 events, u32 ssid, u32 tsid,
-                     u16 tclass, u32 perms);
+int avc_add_callback(int (*callback)(u32 event), u32 events);
 
 /* Exported to selinuxfs */
 int avc_get_hash_stats(char *page);
diff --git a/security/selinux/netif.c b/security/selinux/netif.c
index 326f22cbe405..47a49d1a6f6a 100644
--- a/security/selinux/netif.c
+++ b/security/selinux/netif.c
@@ -252,8 +252,7 @@ static void sel_netif_flush(void)
         spin_unlock_bh(&sel_netif_lock);
 }
 
-static int sel_netif_avc_callback(u32 event, u32 ssid, u32 tsid,
-                                  u16 class, u32 perms, u32 *retained)
+static int sel_netif_avc_callback(u32 event)
 {
         if (event == AVC_CALLBACK_RESET) {
                 sel_netif_flush();
@@ -292,8 +291,7 @@ static __init int sel_netif_init(void)
 
         register_netdevice_notifier(&sel_netif_netdev_notifier);
 
-        err = avc_add_callback(sel_netif_avc_callback, AVC_CALLBACK_RESET,
-                               SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
+        err = avc_add_callback(sel_netif_avc_callback, AVC_CALLBACK_RESET);
         if (err)
                 panic("avc_add_callback() failed, error %d\n", err);
 
diff --git a/security/selinux/netnode.c b/security/selinux/netnode.c
index 86365857c088..28f911cdd7c7 100644
--- a/security/selinux/netnode.c
+++ b/security/selinux/netnode.c
@@ -297,8 +297,7 @@ static void sel_netnode_flush(void)
         spin_unlock_bh(&sel_netnode_lock);
 }
 
-static int sel_netnode_avc_callback(u32 event, u32 ssid, u32 tsid,
-                                    u16 class, u32 perms, u32 *retained)
+static int sel_netnode_avc_callback(u32 event)
 {
         if (event == AVC_CALLBACK_RESET) {
                 sel_netnode_flush();
@@ -320,8 +319,7 @@ static __init int sel_netnode_init(void)
                 sel_netnode_hash[iter].size = 0;
         }
 
-        ret = avc_add_callback(sel_netnode_avc_callback, AVC_CALLBACK_RESET,
-                               SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
+        ret = avc_add_callback(sel_netnode_avc_callback, AVC_CALLBACK_RESET);
         if (ret != 0)
                 panic("avc_add_callback() failed, error %d\n", ret);
 
diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index 7b9eb1faf68b..d35379781c2c 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -234,8 +234,7 @@ static void sel_netport_flush(void)
         spin_unlock_bh(&sel_netport_lock);
 }
 
-static int sel_netport_avc_callback(u32 event, u32 ssid, u32 tsid,
-                                    u16 class, u32 perms, u32 *retained)
+static int sel_netport_avc_callback(u32 event)
 {
         if (event == AVC_CALLBACK_RESET) {
                 sel_netport_flush();
@@ -257,8 +256,7 @@ static __init int sel_netport_init(void)
                 sel_netport_hash[iter].size = 0;
         }
 
-        ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET,
-                               SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
+        ret = avc_add_callback(sel_netport_avc_callback, AVC_CALLBACK_RESET);
         if (ret != 0)
                 panic("avc_add_callback() failed, error %d\n", ret);
 
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 9b7e7ed54e7e..4321b8fc8863 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -3044,8 +3044,7 @@ out:
 
 static int (*aurule_callback)(void) = audit_update_lsm_rules;
 
-static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid,
-                               u16 class, u32 perms, u32 *retained)
+static int aurule_avc_callback(u32 event)
 {
         int err = 0;
 
@@ -3058,8 +3057,7 @@ static int __init aurule_init(void)
 {
         int err;
 
-        err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET,
-                               SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
+        err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET);
         if (err)
                 panic("avc_add_callback() failed, error %d\n", err);