From 64af1bac9b979ae1f2f052742fda06d65f497643 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Fri, 30 Sep 2011 14:37:27 +0000 Subject: [PATCH] bridge: allow updating existing fdb entries Need to allow application to update existing fdb entries that already exist. This makes bridge netlink neighbor API have same flags and semantics as ip neighbor table. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 68def3b7fb49..c8e7861b88b0 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -558,19 +558,28 @@ skip: /* Create new static fdb entry */ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, - __u16 state) + __u16 state, __u16 flags) { struct net_bridge *br = source->br; struct hlist_head *head = &br->hash[br_mac_hash(addr)]; struct net_bridge_fdb_entry *fdb; fdb = fdb_find(head, addr); - if (fdb) - return -EEXIST; + if (fdb == NULL) { + if (!(flags & NLM_F_CREATE)) + return -ENOENT; - fdb = fdb_create(head, source, addr); - if (!fdb) - return -ENOMEM; + fdb = fdb_create(head, source, addr); + if (!fdb) + return -ENOMEM; + } else { + if (flags & NLM_F_EXCL) + return -EEXIST; + + if (flags & NLM_F_REPLACE) + fdb->updated = fdb->used = jiffies; + fdb->is_local = fdb->is_static = 0; + } if (state & NUD_PERMANENT) fdb->is_local = fdb->is_static = 1; @@ -626,7 +635,7 @@ int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) } spin_lock_bh(&p->br->hash_lock); - err = fdb_add_entry(p, addr, ndm->ndm_state); + err = fdb_add_entry(p, addr, ndm->ndm_state, nlh->nlmsg_flags); spin_unlock_bh(&p->br->hash_lock); return err; -- 2.30.2