diff options
| author | Martin KaFai Lau <kafai@fb.com> | 2016-04-12 00:29:37 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-14 22:29:53 +0200 |
| commit | e646b657f6983017783914a951039e323120dc55 (patch) | |
| tree | 4e761d6859d0784b6e24fb1f30cc85467053eba2 /net/ipv6/udp.c | |
| parent | ipv6: datagram: Update dst cache of a connected datagram sk during pmtu update (diff) | |
| download | linux-e646b657f6983017783914a951039e323120dc55.tar.xz linux-e646b657f6983017783914a951039e323120dc55.zip | |
ipv6: udp: Do a route lookup and update during release_cb
This patch adds a release_cb for UDPv6. It does a route lookup
and updates sk->sk_dst_cache if it is needed. It picks up the
left-over job from ip6_sk_update_pmtu() if the sk was owned
by user during the pmtu update.
It takes a rcu_read_lock to protect the __sk_dst_get() operations
because another thread may do ip6_dst_store() without taking the
sk lock (e.g. sendmsg).
Fixes: 45e4fd26683c ("ipv6: Only create RTF_CACHE routes after encountering pmtu exception")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Reported-by: Wei Wang <weiwan@google.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@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 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 8125931106be..6bc5c664fa46 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -1539,6 +1539,7 @@ struct proto udpv6_prot = { .sendmsg = udpv6_sendmsg, .recvmsg = udpv6_recvmsg, .backlog_rcv = __udpv6_queue_rcv_skb, + .release_cb = ip6_datagram_release_cb, .hash = udp_lib_hash, .unhash = udp_lib_unhash, .rehash = udp_v6_rehash, |