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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-30 13:36:15 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-30 14:12:06 -0700
commitadcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054 (patch)
tree6bf8f6facbfbac9ea8ed4d3310ea46a7518ae453
parent2889139a6acd2945f6143eb85f7dc2a22a352e1a (diff)
downloadop-kernel-dev-adcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054.zip
op-kernel-dev-adcfc7d0b4d7bc3c7edac6fdde9f3ae510bd6054.tar.gz
[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>
-rw-r--r--include/net/protocol.h6
-rw-r--r--net/ipv4/tcp.c1
-rw-r--r--net/ipv6/exthdrs.c4
-rw-r--r--net/ipv6/ipv6_sockglue.c62
-rw-r--r--net/ipv6/tcp_ipv6.c1
5 files changed, 72 insertions, 2 deletions
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 40b6b9c..a225d63 100644
--- 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
index 0bb0ac9..b7cf26e 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -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;
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index a18d425..9d0ee7f 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -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 @@ 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
index 4c20eeb..25f8bf8 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;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index b36d5b2..bf7f8c2 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -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,
};
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