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| author | Edward Cree <ecree@solarflare.com> | 2018-07-05 15:47:39 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-06 11:19:07 +0900 |
| commit | efe6aaca67a0229a195f493d142102c864b41dde (patch) | |
| tree | 04ac8eb3f34139235484304995944505d8c0995e /net/ipv4/ip_input.c | |
| parent | 2cc0608e42aceb38abc9e57a017449b9efc2e4a9 (diff) | |
| download | lwn-efe6aaca67a0229a195f493d142102c864b41dde.tar.gz lwn-efe6aaca67a0229a195f493d142102c864b41dde.zip | |
net: ipv4: fix list processing on L3 slave devices
If we have an L3 master device, l3mdev_ip_rcv() will steal the skb, but
we were returning NET_RX_SUCCESS from ip_rcv_finish_core() which meant
that ip_list_rcv_finish() would keep it on the list. Instead let's
move the l3mdev_ip_rcv() call into the caller, so that our response to
a steal can be different in the single packet path (return
NET_RX_SUCCESS) and the list path (forget this packet and continue).
Fixes: 5fa12739a53d ("net: ipv4: listify ip_rcv_finish")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_input.c')
| -rw-r--r-- | net/ipv4/ip_input.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index 14ba628b2761..1a3b6f32b1c9 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -316,13 +316,6 @@ static int ip_rcv_finish_core(struct net *net, struct sock *sk, struct rtable *rt; int err; - /* if ingress device is enslaved to an L3 master device pass the - * skb to its handler for processing - */ - skb = l3mdev_ip_rcv(skb); - if (!skb) - return NET_RX_SUCCESS; - if (net->ipv4.sysctl_ip_early_demux && !skb_dst(skb) && !skb->sk && @@ -408,8 +401,16 @@ drop_error: static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb) { - int ret = ip_rcv_finish_core(net, sk, skb); + int ret; + + /* if ingress device is enslaved to an L3 master device pass the + * skb to its handler for processing + */ + skb = l3mdev_ip_rcv(skb); + if (!skb) + return NET_RX_SUCCESS; + ret = ip_rcv_finish_core(net, sk, skb); if (ret != NET_RX_DROP) ret = dst_input(skb); return ret; @@ -545,6 +546,12 @@ static void ip_list_rcv_finish(struct net *net, struct sock *sk, struct dst_entry *dst; list_del(&skb->list); + /* if ingress device is enslaved to an L3 master device pass the + * skb to its handler for processing + */ + skb = l3mdev_ip_rcv(skb); + if (!skb) + continue; if (ip_rcv_finish_core(net, sk, skb) == NET_RX_DROP) continue; |