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authorstephen hemminger <shemminger@vyatta.com>2011-11-09 22:30:08 +0400
committerDavid S. Miller <davem@davemloft.net>2011-11-14 09:41:54 +0400
commit292d1398983f3514a0eab13b7606df7f4730b498 (patch)
tree4d62bdf2fd88b56432d8b9ec38dcf31e3e2e2a47 /net/bridge
parent23020ab35364f2c91133b099c2b1f7458e29aa96 (diff)
downloadlinux-292d1398983f3514a0eab13b7606df7f4730b498.tar.xz
bridge: add NTF_USE support
More changes to the recent code to support control of forwarding database via netlink. * Support NTF_USE like neighbour table * Validate state bits from application * Only send notifications (and change bits) if new entry is different. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_fdb.c38
1 files changed, 27 insertions, 11 deletions
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index c8e7861b88b0..973813e34428 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -556,7 +556,7 @@ skip:
return skb->len;
}
-/* Create new static fdb entry */
+/* Update (create or replace) forwarding database entry */
static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
__u16 state, __u16 flags)
{
@@ -575,16 +575,21 @@ static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
} else {
if (flags & NLM_F_EXCL)
return -EEXIST;
+ }
+
+ if (fdb_to_nud(fdb) != state) {
+ if (state & NUD_PERMANENT)
+ fdb->is_local = fdb->is_static = 1;
+ else if (state & NUD_NOARP) {
+ fdb->is_local = 0;
+ fdb->is_static = 1;
+ } else
+ fdb->is_local = fdb->is_static = 0;
- if (flags & NLM_F_REPLACE)
- fdb->updated = fdb->used = jiffies;
- fdb->is_local = fdb->is_static = 0;
+ fdb->updated = fdb->used = jiffies;
+ fdb_notify(fdb, RTM_NEWNEIGH);
}
- if (state & NUD_PERMANENT)
- fdb->is_local = fdb->is_static = 1;
- else if (state & NUD_NOARP)
- fdb->is_static = 1;
return 0;
}
@@ -627,6 +632,11 @@ int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
return -EINVAL;
}
+ if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
+ pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
+ return -EINVAL;
+ }
+
p = br_port_get_rtnl(dev);
if (p == NULL) {
pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
@@ -634,9 +644,15 @@ int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
return -EINVAL;
}
- spin_lock_bh(&p->br->hash_lock);
- err = fdb_add_entry(p, addr, ndm->ndm_state, nlh->nlmsg_flags);
- spin_unlock_bh(&p->br->hash_lock);
+ if (ndm->ndm_flags & NTF_USE) {
+ rcu_read_lock();
+ br_fdb_update(p->br, p, addr);
+ rcu_read_unlock();
+ } else {
+ spin_lock_bh(&p->br->hash_lock);
+ err = fdb_add_entry(p, addr, ndm->ndm_state, nlh->nlmsg_flags);
+ spin_unlock_bh(&p->br->hash_lock);
+ }
return err;
}