X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=security%2Fkeys%2Fuser_defined.c;h=7c687d568221cd71a3e863b9c9c50f5cd9352005;hb=414f827c46973ba39320cfb43feb55a0eeb9b4e8;hp=8e71895b97a7eaa90c4aee3088794d5b827a7cd6;hpb=0a0fc0ddbe732779366ab6b1b879f62195e65967;p=karo-tx-linux.git

diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
index 8e71895b97a7..7c687d568221 100644
--- a/security/keys/user_defined.c
+++ b/security/keys/user_defined.c
@@ -11,7 +11,6 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/seq_file.h>
 #include <linux/err.h>
@@ -28,6 +27,7 @@ struct key_type key_type_user = {
 	.instantiate	= user_instantiate,
 	.update		= user_update,
 	.match		= user_match,
+	.revoke		= user_revoke,
 	.destroy	= user_destroy,
 	.describe	= user_describe,
 	.read		= user_read,
@@ -67,6 +67,7 @@ error:
 	return ret;
 
 } /* end user_instantiate() */
+
 EXPORT_SYMBOL_GPL(user_instantiate);
 
 /*****************************************************************************/
@@ -141,7 +142,28 @@ EXPORT_SYMBOL_GPL(user_match);
 
 /*****************************************************************************/
 /*
- * dispose of the data dangling from the corpse of a user
+ * dispose of the links from a revoked keyring
+ * - called with the key sem write-locked
+ */
+void user_revoke(struct key *key)
+{
+	struct user_key_payload *upayload = key->payload.data;
+
+	/* clear the quota */
+	key_payload_reserve(key, 0);
+
+	if (upayload) {
+		rcu_assign_pointer(key->payload.data, NULL);
+		call_rcu(&upayload->rcu, user_update_rcu_disposal);
+	}
+
+} /* end user_revoke() */
+
+EXPORT_SYMBOL(user_revoke);
+
+/*****************************************************************************/
+/*
+ * dispose of the data dangling from the corpse of a user key
  */
 void user_destroy(struct key *key)
 {