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Commit adcfc7d0 authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller
Browse files

[IPV6]: Added GSO support for TCPv6 



This patch adds GSO support for IPv6 and TCPv6.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2889139a

include/net/protocol.h

+6 −0
Original line number Diff line number Diff line
@@ -50,11 +50,17 @@ struct inet6_protocol 
			       struct inet6_skb_parm *opt,

			       int type, int code, int offset,

			       __u32 info);



	struct sk_buff *(*gso_segment)(struct sk_buff *skb,

				       int features);



	unsigned int	flags;	/* INET6_PROTO_xxx */

};



#define INET6_PROTO_NOPOLICY	0x1

#define INET6_PROTO_FINAL	0x2

/* This should be set for any extension header which is compatible with GSO. */

#define INET6_PROTO_GSO_EXTHDR	0x4

#endif



/* This is used to register socket interfaces for IP protocols.  */

net/ipv4/tcp.c

+1 −0
Original line number Diff line number Diff line
@@ -2215,6 +2215,7 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features) 
out:

	return segs;

}

EXPORT_SYMBOL(tcp_tso_segment);



extern void __skb_cb_too_small_for_tcp(int, int);

extern struct tcp_congestion_ops tcp_reno;

net/ipv6/exthdrs.c

+2 −2
Original line number Diff line number Diff line
@@ -179,7 +179,7 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp) 


static struct inet6_protocol destopt_protocol = {

	.handler	=	ipv6_destopt_rcv,

	.flags		=	INET6_PROTO_NOPOLICY,

	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,

};



void __init ipv6_destopt_init(void)
@@ -340,7 +340,7 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp) 


static struct inet6_protocol rthdr_protocol = {

	.handler	=	ipv6_rthdr_rcv,

	.flags		=	INET6_PROTO_NOPOLICY,

	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,

};



void __init ipv6_rthdr_init(void)

net/ipv6/ipv6_sockglue.c

+62 −0
Original line number Diff line number Diff line
@@ -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;

net/ipv6/tcp_ipv6.c

+1 −0
Original line number Diff line number Diff line
@@ -1606,6 +1606,7 @@ struct proto tcpv6_prot = { 
static struct inet6_protocol tcpv6_protocol = {

	.handler	=	tcp_v6_rcv,

	.err_handler	=	tcp_v6_err,

	.gso_segment	=	tcp_tso_segment,

	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,

};