diff options
| author |   Tom Herbert <therbert@google.com> | 2014-08-22 13:34:44 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-08-24 18:09:24 -0700 |
| commit | 57c67ff4bd92af634f7c91c40eb02a96dd785dda (patch) | |
| tree | f10aac8b764b6254075ebcba255285140d1cabea /net/ipv6 | |
| parent | tcp: Call skb_gro_checksum_validate (diff) | |
| download | linux-dev-57c67ff4bd92af634f7c91c40eb02a96dd785dda.tar.xz linux-dev-57c67ff4bd92af634f7c91c40eb02a96dd785dda.zip | |
udp: additional GRO support
Implement GRO for UDPv6. Add UDP checksum verification in gro_receive
for both UDP4 and UDP6 calling skb_gro_checksum_validate_zero_check.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/udp_offload.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c index 0ae3d98f83e0..b13e377e9c53 100644 --- a/net/ipv6/udp_offload.c +++ b/net/ipv6/udp_offload.c @@ -10,6 +10,7 @@ * UDPv6 GSO support */ #include <linux/skbuff.h> +#include <linux/netdevice.h> #include <net/protocol.h> #include <net/ipv6.h> #include <net/udp.h> @@ -127,10 +128,42 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, out: return segs; } + +static struct sk_buff **udp6_gro_receive(struct sk_buff **head, + struct sk_buff *skb) +{ + struct udphdr *uh = udp_gro_udphdr(skb); + + /* Don't bother verifying checksum if we're going to flush anyway. */ + if (unlikely(!uh) || + (!NAPI_GRO_CB(skb)->flush && + skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check, + ip6_gro_compute_pseudo))) { + NAPI_GRO_CB(skb)->flush = 1; + return NULL; + } + + return udp_gro_receive(head, skb, uh); +} + +int udp6_gro_complete(struct sk_buff *skb, int nhoff) +{ + const struct ipv6hdr *ipv6h = ipv6_hdr(skb); + struct udphdr *uh = (struct udphdr *)(skb->data + nhoff); + + if (uh->check) + uh->check = ~udp_v6_check(skb->len - nhoff, &ipv6h->saddr, + &ipv6h->daddr, 0); + + return udp_gro_complete(skb, nhoff); +} + static const struct net_offload udpv6_offload = { .callbacks = { .gso_send_check = udp6_ufo_send_check, .gso_segment = udp6_ufo_fragment, + .gro_receive = udp6_gro_receive, + .gro_complete = udp6_gro_complete, }, }; |