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| 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/ipv6/udp.c | |
| parent | 63fca65d08632fbec9d9b655f671cf08aa1aeeb8 (diff) | |
| download | linux-rpi3-0dec879f636f11b0ffda1cb5fd96a1754c59ead3.tar.gz linux-rpi3-0dec879f636f11b0ffda1cb5fd96a1754c59ead3.tar.bz2 linux-rpi3-0dec879f636f11b0ffda1cb5fd96a1754c59ead3.zip | |
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/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index b4c6516a3a0c..51346fa70298 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1308,7 +1308,8 @@ out: return err; do_confirm: - dst_confirm(dst); + if (msg->msg_flags & MSG_PROBE) + dst_confirm_neigh(dst, &fl6.daddr); if (!(msg->msg_flags&MSG_PROBE) || len) goto back_from_confirm; err = 0; |