netlink: Improve returned error codes

[net-next-2.6.git] / include / net / genetlink.h

diff --git a/include/net/genetlink.h b/include/net/genetlink.h
index b6eaca122db871ab4b269a99dcbabda0fe9bcf90..747c255d1df034dcac884a1bffb5dfffbb889978 100644 (file)
--- a/include/net/genetlink.h
+++ b/include/net/genetlink.h
@@ -4,6 +4,22 @@
 #include <linux/genetlink.h>
 #include <net/netlink.h>
 
+/**
+ * struct genl_multicast_group - generic netlink multicast group
+ * @name: name of the multicast group, names are per-family
+ * @id: multicast group ID, assigned by the core, to use with
+ *      genlmsg_multicast().
+ * @list: list entry for linking
+ * @family: pointer to family, need not be set before registering
+ */
+struct genl_multicast_group
+{
+       struct genl_family      *family;        /* private */
+       struct list_head        list;           /* private */
+       char                    name[GENL_NAMSIZ];
+       u32                     id;
+};
+
 /**
  * struct genl_family - generic netlink family
  * @id: protocol family idenfitier
@@ -14,6 +30,7 @@
  * @attrbuf: buffer to store parsed attributes
  * @ops_list: list of all assigned operations
  * @family_list: family list
+ * @mcast_groups: multicast groups list
  */
 struct genl_family
 {
@@ -25,6 +42,7 @@ struct genl_family
        struct nlattr **        attrbuf;        /* private */
        struct list_head        ops_list;       /* private */
        struct list_head        family_list;    /* private */
+       struct list_head        mcast_groups;   /* private */
 };
 
 /**
@@ -73,6 +91,10 @@ extern int genl_register_family(struct genl_family *family);
 extern int genl_unregister_family(struct genl_family *family);
 extern int genl_register_ops(struct genl_family *, struct genl_ops *ops);
 extern int genl_unregister_ops(struct genl_family *, struct genl_ops *ops);
+extern int genl_register_mc_group(struct genl_family *family,
+                                 struct genl_multicast_group *grp);
+extern void genl_unregister_mc_group(struct genl_family *family,
+                                    struct genl_multicast_group *grp);
 
 extern struct sock *genl_sock;
 
@@ -140,9 +162,9 @@ static inline int genlmsg_end(struct sk_buff *skb, void *hdr)
  * @skb: socket buffer the message is stored in
  * @hdr: generic netlink message header
  */
-static inline int genlmsg_cancel(struct sk_buff *skb, void *hdr)
+static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
 {
-       return nlmsg_cancel(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
+       nlmsg_cancel(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
 }
 
 /**