Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / net / ipv6 / ipv6_sockglue.c

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 4c20eeb..1c50e6a 100644 (file)
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -27,7 +27,6 @@
 
 #include <linux/module.h>
 #include <linux/capability.h>
-#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/socket.h>
@@ -58,9 +57,116 @@
 
 DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
 
+static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
+                                                   int proto)
+{
+       struct inet6_protocol *ops = NULL;
+
+       for (;;) {
+               struct ipv6_opt_hdr *opth;
+               int len;
+
+               if (proto != NEXTHDR_HOP) {
+                       ops = rcu_dereference(inet6_protos[proto]);
+
+                       if (unlikely(!ops))
+                               break;
+
+                       if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
+                               break;
+               }
+
+               if (unlikely(!pskb_may_pull(skb, 8)))
+                       break;
+
+               opth = (void *)skb->data;
+               len = opth->hdrlen * 8 + 8;
+
+               if (unlikely(!pskb_may_pull(skb, len)))
+                       break;
+
+               proto = opth->nexthdr;
+               __skb_pull(skb, len);
+       }
+
+       return ops;
+}
+
+static int ipv6_gso_send_check(struct sk_buff *skb)
+{
+       struct ipv6hdr *ipv6h;
+       struct inet6_protocol *ops;
+       int err = -EINVAL;
+
+       if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+               goto out;
+
+       ipv6h = skb->nh.ipv6h;
+       __skb_pull(skb, sizeof(*ipv6h));
+       err = -EPROTONOSUPPORT;
+
+       rcu_read_lock();
+       ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
+       if (likely(ops && ops->gso_send_check)) {
+               skb->h.raw = skb->data;
+               err = ops->gso_send_check(skb);
+       }
+       rcu_read_unlock();
+
+out:
+       return err;
+}
+
+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;
+
+       if (!(features & NETIF_F_HW_CSUM))
+               features &= ~NETIF_F_SG;
+
+       if (unlikely(skb_shinfo(skb)->gso_type &
+                    ~(SKB_GSO_UDP |
+                      SKB_GSO_DODGY |
+                      SKB_GSO_TCP_ECN |
+                      SKB_GSO_TCPV6 |
+                      0)))
+               goto out;
+
+       if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
+               goto out;
+
+       ipv6h = skb->nh.ipv6h;
+       __skb_pull(skb, sizeof(*ipv6h));
+       segs = ERR_PTR(-EPROTONOSUPPORT);
+
+       rcu_read_lock();
+       ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
+       if (likely(ops && ops->gso_segment)) {
+               skb->h.raw = skb->data;
+               segs = ops->gso_segment(skb, features);
+       }
+       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 -
+                                          sizeof(*ipv6h));
+       }
+
+out:
+       return segs;
+}
+
 static struct packet_type ipv6_packet_type = {
        .type = __constant_htons(ETH_P_IPV6), 
        .func = ipv6_rcv,
+       .gso_send_check = ipv6_gso_send_check,
+       .gso_segment = ipv6_gso_segment,
 };
 
 struct ip6_ra_chain *ip6_ra_chain;
@@ -259,7 +365,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
                break;
 
        case IPV6_TCLASS:
-               if (val < 0 || val > 0xff)
+               if (val < -1 || val > 0xff)
                        goto e_inval;
                np->tclass = val;
                retv = 0;
@@ -844,6 +950,8 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 
        case IPV6_TCLASS:
                val = np->tclass;
+               if (val < 0)
+                       val = 0;
                break;
 
        case IPV6_RECVTCLASS: