diff options
author | Herbert Xu <herbert@gondor.apana.org.au> | 2006-06-30 22:36:15 +0200 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-30 23:12:06 +0200 |
commit | adcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054 (patch) | |
tree | 6bf8f6facbfbac9ea8ed4d3310ea46a7518ae453 /net/ipv6/ipv6_sockglue.c | |
parent | [IPV6]: Remove redundant length check on input (diff) | |
download | linux-adcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054.tar.xz linux-adcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054.zip |
[IPV6]: Added GSO support for TCPv6
This patch adds GSO support for IPv6 and TCPv6.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
-rw-r--r-- | net/ipv6/ipv6_sockglue.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 4c20eeb3d568..25f8bf8ac49b 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -58,9 +58,71 @@ DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly; +static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) +{ + struct sk_buff *segs = ERR_PTR(-EINVAL); + struct ipv6hdr *ipv6h; + struct inet6_protocol *ops; + int proto; + + if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) + goto out; + + ipv6h = skb->nh.ipv6h; + proto = ipv6h->nexthdr; + __skb_pull(skb, sizeof(*ipv6h)); + + rcu_read_lock(); + for (;;) { + struct ipv6_opt_hdr *opth; + int len; + + if (proto != NEXTHDR_HOP) { + ops = rcu_dereference(inet6_protos[proto]); + + if (unlikely(!ops)) + goto unlock; + + if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) + break; + } + + if (unlikely(!pskb_may_pull(skb, 8))) + goto unlock; + + opth = (void *)skb->data; + len = opth->hdrlen * 8 + 8; + + if (unlikely(!pskb_may_pull(skb, len))) + goto unlock; + + proto = opth->nexthdr; + __skb_pull(skb, len); + } + + skb->h.raw = skb->data; + if (likely(ops->gso_segment)) + segs = ops->gso_segment(skb, features); + +unlock: + rcu_read_unlock(); + + if (unlikely(IS_ERR(segs))) + goto out; + + for (skb = segs; skb; skb = skb->next) { + ipv6h = skb->nh.ipv6h; + ipv6h->payload_len = htons(skb->len - skb->mac_len); + } + +out: + return segs; +} + static struct packet_type ipv6_packet_type = { .type = __constant_htons(ETH_P_IPV6), .func = ipv6_rcv, + .gso_segment = ipv6_gso_segment, }; struct ip6_ra_chain *ip6_ra_chain; |