X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=security%2Fkeys%2Fuser_defined.c;h=7c687d568221cd71a3e863b9c9c50f5cd9352005;hb=7bd0fea2c590d94995c2ee0b32e786c1c62621fa;hp=cbda3b2780a100696b38e7ce47dec9e3eb46cf33;hpb=18ce920a6eba05c0d55cdc95fbbadf7e4c4b457b;p=linux-2.6-omap-h63xx.git

diff --git a/security/keys/user_defined.c b/security/keys/user_defined.c
index cbda3b2780a..7c687d56822 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>
@@ -26,9 +25,9 @@
 struct key_type key_type_user = {
 	.name		= "user",
 	.instantiate	= user_instantiate,
-	.duplicate	= user_duplicate,
 	.update		= user_update,
 	.match		= user_match,
+	.revoke		= user_revoke,
 	.destroy	= user_destroy,
 	.describe	= user_describe,
 	.read		= user_read,
@@ -71,37 +70,6 @@ error:
 
 EXPORT_SYMBOL_GPL(user_instantiate);
 
-/*****************************************************************************/
-/*
- * duplicate a user defined key
- * - both keys' semaphores are locked against further modification
- * - the new key cannot yet be accessed
- */
-int user_duplicate(struct key *key, const struct key *source)
-{
-	struct user_key_payload *upayload, *spayload;
-	int ret;
-
-	/* just copy the payload */
-	ret = -ENOMEM;
-	upayload = kmalloc(sizeof(*upayload) + source->datalen, GFP_KERNEL);
-	if (upayload) {
-		spayload = rcu_dereference(source->payload.data);
-		BUG_ON(source->datalen != spayload->datalen);
-
-		upayload->datalen = key->datalen = spayload->datalen;
-		memcpy(upayload->data, spayload->data, key->datalen);
-
-		key->payload.data = upayload;
-		ret = 0;
-	}
-
-	return ret;
-
-} /* end user_duplicate() */
-
-EXPORT_SYMBOL_GPL(user_duplicate);
-
 /*****************************************************************************/
 /*
  * dispose of the old data from an updated user defined key
@@ -174,7 +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)
 {