diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 264fc1585b3c41df4054985abaafe175a47e37d3..630eafdb79e85bf84b1fe3c53dff2af5c968df17 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -378,6 +378,7 @@ static int vrf_finish_output6(struct net *net, struct sock *sk, if (unlikely(!neigh)) neigh = __neigh_create(&nd_tbl, nexthop, dst->dev, false); if (!IS_ERR(neigh)) { + sock_confirm_neigh(skb, neigh); ret = dst_neigh_output(dst, neigh, skb); rcu_read_unlock_bh(); return ret; @@ -574,8 +575,10 @@ static int vrf_finish_output(struct net *net, struct sock *sk, struct sk_buff *s neigh = __ipv4_neigh_lookup_noref(dev, nexthop); if (unlikely(!neigh)) neigh = __neigh_create(&arp_tbl, &nexthop, dev, false); - if (!IS_ERR(neigh)) + if (!IS_ERR(neigh)) { + sock_confirm_neigh(skb, neigh); ret = dst_neigh_output(dst, neigh, skb); + } rcu_read_unlock_bh(); err: diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index c6a78e1892b6b20d11314f94d6d6cef069580d45..f1adddc1c5ac67c350e280d89abc3f3c10e2dbac 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -612,6 +612,7 @@ static inline bool skb_mstamp_after(const struct skb_mstamp *t1, * @wifi_acked_valid: wifi_acked was set * @wifi_acked: whether frame was acked on wifi or not * @no_fcs: Request NIC to treat last 4 bytes as Ethernet FCS + * @dst_pending_confirm: need to confirm neighbour * @napi_id: id of the NAPI struct this skb came from * @secmark: security marking * @mark: Generic packet mark @@ -741,6 +742,7 @@ struct sk_buff { __u8 csum_level:2; __u8 csum_bad:1; + __u8 dst_pending_confirm:1; #ifdef CONFIG_IPV6_NDISC_NODETYPE __u8 ndisc_nodetype:2; #endif @@ -3698,6 +3700,16 @@ static inline bool skb_rx_queue_recorded(const struct sk_buff *skb) return skb->queue_mapping != 0; } +static inline void skb_set_dst_pending_confirm(struct sk_buff *skb, u32 val) +{ + skb->dst_pending_confirm = val; +} + +static inline bool skb_get_dst_pending_confirm(const struct sk_buff *skb) +{ + return skb->dst_pending_confirm != 0; +} + static inline struct sec_path *skb_sec_path(struct sk_buff *skb) { #ifdef CONFIG_XFRM diff --git a/include/net/sock.h b/include/net/sock.h index 85d856b94b4b949dc8377cf49a9114b957e39bcb..6f83e78eaa5a8928b34ecc63d49b1baf19722c10 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1821,6 +1821,20 @@ static inline void sk_dst_confirm(struct sock *sk) sk->sk_dst_pending_confirm = 1; } +static inline void sock_confirm_neigh(struct sk_buff *skb, struct neighbour *n) +{ + if (skb_get_dst_pending_confirm(skb)) { + struct sock *sk = skb->sk; + unsigned long now = jiffies; + + /* avoid dirtying neighbour */ + if (n->confirmed != now) + n->confirmed = now; + if (sk && sk->sk_dst_pending_confirm) + sk->sk_dst_pending_confirm = 0; + } +} + bool sk_mc_loop(struct sock *sk); static inline bool sk_can_gso(const struct sock *sk) diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index b67719f459537d49d958de9874414ea868c4a8e1..c9fc32fa3272760ecce17841519753f892a1f66e 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -222,7 +222,10 @@ static int ip_finish_output2(struct net *net, struct sock *sk, struct sk_buff *s if (unlikely(!neigh)) neigh = __neigh_create(&arp_tbl, &nexthop, dev, false); if (!IS_ERR(neigh)) { - int res = dst_neigh_output(dst, neigh, skb); + int res; + + sock_confirm_neigh(skb, neigh); + res = dst_neigh_output(dst, neigh, skb); rcu_read_unlock_bh(); return res; diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index b6a94ff0bbd0d5f42c78b7bcd6ea9fbe5ac9a595..14d99fbf102e12b0952b97183689a65d219f4b3d 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -119,6 +119,7 @@ static int ip6_finish_output2(struct net *net, struct sock *sk, struct sk_buff * if (unlikely(!neigh)) neigh = __neigh_create(&nd_tbl, nexthop, dst->dev, false); if (!IS_ERR(neigh)) { + sock_confirm_neigh(skb, neigh); ret = dst_neigh_output(dst, neigh, skb); rcu_read_unlock_bh(); return ret;