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vxlan: fix rcu related warning

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Vxlan remote list is protected by RCU and guaranteed to be non-empty.
Split out the rcu and non-rcu access to the list to fix warning

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2013-08-04 17:17:39 -07:00 committed by David S. Miller
parent 762a3d89eb
commit 5ca5461c3e
1 changed files with 11 additions and 5 deletions
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16
drivers/net/vxlan.c
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@ -177,9 +177,14 @@ static inline struct hlist_head *vs_head(struct net *net, __be16 port)
/* First remote destination for a forwarding entry.
* Guaranteed to be non-NULL because remotes are never deleted.
*/
static inline struct vxlan_rdst *first_remote(struct vxlan_fdb *fdb)
static inline struct vxlan_rdst *first_remote_rcu(struct vxlan_fdb *fdb)
{
return list_first_or_null_rcu(&fdb->remotes, struct vxlan_rdst, list);
return list_entry_rcu(fdb->remotes.next, struct vxlan_rdst, list);
}
static inline struct vxlan_rdst *first_remote_rtnl(struct vxlan_fdb *fdb)
{
return list_first_entry(&fdb->remotes, struct vxlan_rdst, list);
}
/* Find VXLAN socket based on network namespace and UDP port */
@ -297,7 +302,8 @@ static void vxlan_fdb_notify(struct vxlan_dev *vxlan,
if (skb == NULL)
goto errout;
err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0, first_remote(fdb));
err = vxlan_fdb_info(skb, vxlan, fdb, 0, 0, type, 0,
first_remote_rtnl(fdb));
if (err < 0) {
/* -EMSGSIZE implies BUG in vxlan_nlmsg_size() */
WARN_ON(err == -EMSGSIZE);
@ -740,7 +746,7 @@ static bool vxlan_snoop(struct net_device *dev,
f = vxlan_find_mac(vxlan, src_mac);
if (likely(f)) {
struct vxlan_rdst *rdst = first_remote(f);
struct vxlan_rdst *rdst = first_remote_rcu(f);
if (likely(rdst->remote_ip == src_ip))
return false;
@ -1005,7 +1011,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb)
}
f = vxlan_find_mac(vxlan, n->ha);
if (f && first_remote(f)->remote_ip == htonl(INADDR_ANY)) {
if (f && first_remote_rcu(f)->remote_ip == htonl(INADDR_ANY)) {
/* bridge-local neighbor */
neigh_release(n);
goto out;