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| author | Tom Herbert <therbert@google.com> | 2014-08-31 15:12:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-01 21:36:28 -0700 |
| commit | 2abb7cdc0dc84e99b76ef983a1ae1978922aa9b3 (patch) | |
| tree | 9bf6029678d74ef6ad12e832d48d769caf88a4ed /net/ipv4/udp.c | |
| parent | d96535a17dbbafd567961d14c08c0984ddda9c3c (diff) | |
| download | lwn-2abb7cdc0dc84e99b76ef983a1ae1978922aa9b3.tar.gz lwn-2abb7cdc0dc84e99b76ef983a1ae1978922aa9b3.zip | |
udp: Add support for doing checksum unnecessary conversion
Add support for doing CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE
conversion in UDP tunneling path.
In the normal UDP path, we call skb_checksum_try_convert after locating
the UDP socket. The check is that checksum conversion is enabled for
the socket (new flag in UDP socket) and that checksum field is
non-zero.
In the UDP GRO path, we call skb_gro_checksum_try_convert after
checksum is validated and checksum field is non-zero. Since this is
already in GRO we assume that checksum conversion is always wanted.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 3549c21fe5f7..0da3849fd35b 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1788,6 +1788,10 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, if (sk != NULL) { int ret; + if (udp_sk(sk)->convert_csum && uh->check && !IS_UDPLITE(sk)) + skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check, + inet_compute_pseudo); + ret = udp_queue_rcv_skb(sk, skb); sock_put(sk); |