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authorJiri Pirko <jiri@resnulli.us>2013-10-19 12:29:16 +0200
committerDavid S. Miller <davem@davemloft.net>2013-10-19 19:20:52 -0400
commitc547dbf55d5f8cf615ccc0e7265e98db27d3fb8b (patch)
tree90ed7773f5f042db138903f2dbbef7afaf6c2af4 /net
parente36d3ff91130002c7c2d1d6a55556991da1daecc (diff)
downloadlinux-c547dbf55d5f8cf615ccc0e7265e98db27d3fb8b.tar.gz
ip6_output: do skb ufo init for peeked non ufo skb as well
Now, if user application does: sendto len<mtu flag MSG_MORE sendto len>mtu flag 0 The skb is not treated as fragmented one because it is not initialized that way. So move the initialization to fix this. introduced by: commit e89e9cf539a28df7d0eb1d0a545368e9920b34ac "[IPv4/IPv6]: UFO Scatter-gather approach" Signed-off-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_output.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index a54c45ce4a4..975624b8d2e 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1008,6 +1008,7 @@ static inline int ip6_ufo_append_data(struct sock *sk,
{
struct sk_buff *skb;
+ struct frag_hdr fhdr;
int err;
/* There is support for UDP large send offload by network
@@ -1015,8 +1016,6 @@ static inline int ip6_ufo_append_data(struct sock *sk,
* udp datagram
*/
if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL) {
- struct frag_hdr fhdr;
-
skb = sock_alloc_send_skb(sk,
hh_len + fragheaderlen + transhdrlen + 20,
(flags & MSG_DONTWAIT), &err);
@@ -1036,20 +1035,24 @@ static inline int ip6_ufo_append_data(struct sock *sk,
skb->transport_header = skb->network_header + fragheaderlen;
skb->protocol = htons(ETH_P_IPV6);
- skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum = 0;
- /* Specify the length of each IPv6 datagram fragment.
- * It has to be a multiple of 8.
- */
- skb_shinfo(skb)->gso_size = (mtu - fragheaderlen -
- sizeof(struct frag_hdr)) & ~7;
- skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
- ipv6_select_ident(&fhdr, rt);
- skb_shinfo(skb)->ip6_frag_id = fhdr.identification;
__skb_queue_tail(&sk->sk_write_queue, skb);
+ } else if (skb_is_gso(skb)) {
+ goto append;
}
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ /* Specify the length of each IPv6 datagram fragment.
+ * It has to be a multiple of 8.
+ */
+ skb_shinfo(skb)->gso_size = (mtu - fragheaderlen -
+ sizeof(struct frag_hdr)) & ~7;
+ skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
+ ipv6_select_ident(&fhdr, rt);
+ skb_shinfo(skb)->ip6_frag_id = fhdr.identification;
+
+append:
return skb_append_datato_frags(sk, skb, getfrag, from,
(length - transhdrlen));
}