diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/vrf.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 1ce7420322ee..08540b96ec18 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -227,6 +227,20 @@ static netdev_tx_t vrf_process_v6_outbound(struct sk_buff *skb, } #endif +/* based on ip_local_out; can't use it b/c the dst is switched pointing to us */ +static int vrf_ip_local_out(struct net *net, struct sock *sk, + struct sk_buff *skb) +{ + int err; + + err = nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, + skb, NULL, skb_dst(skb)->dev, dst_output); + if (likely(err == 1)) + err = dst_output(net, sk, skb); + + return err; +} + static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, struct net_device *vrf_dev) { @@ -292,7 +306,7 @@ static netdev_tx_t vrf_process_v4_outbound(struct sk_buff *skb, RT_SCOPE_LINK); } - ret = ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); + ret = vrf_ip_local_out(dev_net(skb_dst(skb)->dev), skb->sk, skb); if (unlikely(net_xmit_eval(ret))) vrf_dev->stats.tx_errors++; else @@ -531,6 +545,53 @@ static int vrf_output(struct net *net, struct sock *sk, struct sk_buff *skb) !(IPCB(skb)->flags & IPSKB_REROUTED)); } +/* set dst on skb to send packet to us via dev_xmit path. Allows + * packet to go through device based features such as qdisc, netfilter + * hooks and packet sockets with skb->dev set to vrf device. + */ +static struct sk_buff *vrf_ip_out(struct net_device *vrf_dev, + struct sock *sk, + struct sk_buff *skb) +{ + struct net_vrf *vrf = netdev_priv(vrf_dev); + struct dst_entry *dst = NULL; + struct rtable *rth; + + rcu_read_lock(); + + rth = rcu_dereference(vrf->rth); + if (likely(rth)) { + dst = &rth->dst; + dst_hold(dst); + } + + rcu_read_unlock(); + + if (unlikely(!dst)) { + vrf_tx_error(vrf_dev, skb); + return NULL; + } + + skb_dst_drop(skb); + skb_dst_set(skb, dst); + + return skb; +} + +/* called with rcu lock held */ +static struct sk_buff *vrf_l3_out(struct net_device *vrf_dev, + struct sock *sk, + struct sk_buff *skb, + u16 proto) +{ + switch (proto) { + case AF_INET: + return vrf_ip_out(vrf_dev, sk, skb); + } + + return skb; +} + /* holding rtnl */ static void vrf_rtable_release(struct net_device *dev, struct net_vrf *vrf) { @@ -1067,6 +1128,7 @@ static const struct l3mdev_ops vrf_l3mdev_ops = { .l3mdev_get_rtable = vrf_get_rtable, .l3mdev_get_saddr = vrf_get_saddr, .l3mdev_l3_rcv = vrf_l3_rcv, + .l3mdev_l3_out = vrf_l3_out, #if IS_ENABLED(CONFIG_IPV6) .l3mdev_get_rt6_dst = vrf_get_rt6_dst, .l3mdev_get_saddr6 = vrf_get_saddr6, |