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[GENETLINK]: Dynamic multicast groups.

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Introduce API to dynamically register and unregister multicast groups.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Patrick McHardy <kaber@trash.net>
Acked-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2007-07-18 15:47:52 -07:00
committed by David S. Miller
parent 84659eb529
commit 2dbba6f773
3 changed files with 263 additions and 7 deletions
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22
include/net/genetlink.h
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@@ -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;