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bridge: allow updating existing fdb entries

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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 <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2011-09-30 14:37:27 +00:00 committed by David S. Miller
parent 77f9859837
commit 64af1bac9b
1 changed files with 16 additions and 7 deletions
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23
net/bridge/br_fdb.c
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@ -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;