From a0a400d79e3dd7843e7e81baa3ef2957bdc292d0 Mon Sep 17 00:00:00 2001 From: Patrick McHardy <kaber@trash.net> Date: Sat, 14 Jul 2007 18:52:02 -0700 Subject: [NET]: dev_mcast: add multicast list synchronization helpers The method drivers currently use to synchronize multicast lists is not very pretty: - walk the multicast list - search each entry on a copy of the previous list - if new add to lower device - walk the copy of the previous list - search each entry on the current list - if removed delete from lower device - copy entire list This patch adds a new field to struct dev_addr_list to store the synchronization state and adds two helper functions for synchronization and cleanup. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net> --- include/linux/netdevice.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index f193aba30384..e5af458ab04b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -190,6 +190,7 @@ struct dev_addr_list struct dev_addr_list *next; u8 da_addr[MAX_ADDR_LEN]; u8 da_addrlen; + u8 da_synced; int da_users; int da_gusers; }; @@ -1103,6 +1104,8 @@ extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); +extern int dev_mc_sync(struct net_device *to, struct net_device *from); +extern void dev_mc_unsync(struct net_device *to, struct net_device *from); extern void dev_mc_discard(struct net_device *dev); extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); -- cgit v1.2.3