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[IPV6]: Added GSO support for TCPv6

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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>
This commit is contained in:
Herbert Xu
2006-06-30 13:36:15 -07:00
committed by David S. Miller
parent 2889139a6a
commit adcfc7d0b4
5 changed files with 72 additions and 2 deletions
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62
net/ipv6/ipv6_sockglue.c
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@@ -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;