diff options
| author | Julian Anastasov <ja@ssi.bg> | 2017-02-06 23:14:16 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-07 13:07:47 -0500 |
| commit | 0dec879f636f11b0ffda1cb5fd96a1754c59ead3 (patch) | |
| tree | fcc479052e78ceb30f8f3b95a881cf986f0564dd /net/ipv4 | |
| parent | 63fca65d08632fbec9d9b655f671cf08aa1aeeb8 (diff) | |
net: use dst_confirm_neigh for UDP, RAW, ICMP, L2TP
When same struct dst_entry can be used for many different
neighbours we can not use it for pending confirmations.
The datagram protocols can use MSG_CONFIRM to confirm the
neighbour. When used with MSG_PROBE we do not reach the
code where neighbour is confirmed, so we have to do the
same slow lookup by using the dst_confirm_neigh() helper.
When MSG_PROBE is not used, ip_append_data/ip6_append_data
will set the skb flag dst_pending_confirm.
Reported-by: YueHaibing <yuehaibing@huawei.com>
Fixes: 5110effee8fd ("net: Do delayed neigh confirmation.")
Fixes: f2bb4bedf35d ("ipv4: Cache output routes in fib_info nexthops.")
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ip_output.c | 6 | ||||
| -rw-r--r-- | net/ipv4/ping.c | 3 | ||||
| -rw-r--r-- | net/ipv4/raw.c | 6 | ||||
| -rw-r--r-- | net/ipv4/udp.c | 3 |
4 files changed, 15 insertions, 3 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index c9fc32fa3272..7a719f1ae556 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -889,6 +889,9 @@ static inline int ip_ufo_append_data(struct sock *sk, skb->csum = 0; + if (flags & MSG_CONFIRM) + skb_set_dst_pending_confirm(skb, 1); + __skb_queue_tail(queue, skb); } else if (skb_is_gso(skb)) { goto append; @@ -1089,6 +1092,9 @@ alloc_new_skb: exthdrlen = 0; csummode = CHECKSUM_NONE; + if ((flags & MSG_CONFIRM) && !skb_prev) + skb_set_dst_pending_confirm(skb, 1); + /* * Put the packet on the pending queue. */ diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 592db6a3a0e9..6ee792d83d5b 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -848,7 +848,8 @@ out: return err; do_confirm: - dst_confirm(&rt->dst); + if (msg->msg_flags & MSG_PROBE) + dst_confirm_neigh(&rt->dst, &fl4.daddr); if (!(msg->msg_flags & MSG_PROBE) || len) goto back_from_confirm; err = 0; diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index 4e49e5cb001c..8119e1f66e03 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -383,6 +383,9 @@ static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, sock_tx_timestamp(sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags); + if (flags & MSG_CONFIRM) + skb_set_dst_pending_confirm(skb, 1); + skb->transport_header = skb->network_header; err = -EFAULT; if (memcpy_from_msg(iph, msg, length)) @@ -666,7 +669,8 @@ out: return len; do_confirm: - dst_confirm(&rt->dst); + if (msg->msg_flags & MSG_PROBE) + dst_confirm_neigh(&rt->dst, &fl4.daddr); if (!(msg->msg_flags & MSG_PROBE) || len) goto back_from_confirm; err = 0; diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index cf6ba3387401..4a1ba04565d1 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1101,7 +1101,8 @@ out: return err; do_confirm: - dst_confirm(&rt->dst); + if (msg->msg_flags & MSG_PROBE) + dst_confirm_neigh(&rt->dst, &fl4->daddr); if (!(msg->msg_flags&MSG_PROBE) || len) goto back_from_confirm; err = 0; |