Hi: [IPV6]: Added GSO support for TCPv6
This patch adds GSO support for IPv6 and TCPv6. Signed-off-by: Herbert Xu <[EMAIL PROTECTED]> Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- diff --git a/include/net/protocol.h b/include/net/protocol.h --- a/include/net/protocol.h +++ b/include/net/protocol.h @@ -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. */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2215,6 +2215,7 @@ struct sk_buff *tcp_tso_segment(struct s 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; diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -179,7 +179,7 @@ static int ipv6_destopt_rcv(struct sk_bu 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 @@ looped_back: 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) diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c --- 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; diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1605,6 +1605,7 @@ 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, }; - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
