summaryrefslogtreecommitdiffstats
path: root/net/ipv6/ip6_offload.c
diff options
context:
space:
mode:
authorSteffen Klassert <steffen.klassert@secunet.com>2016-09-19 12:58:47 +0200
committerDavid S. Miller <davem@davemloft.net>2016-09-19 20:59:34 -0400
commit07b26c9454a2a19fff86d6fcf2aba6bc801eb8d8 (patch)
tree45cf751adb10dabaf383eaa07238c3427e3fe3f0 /net/ipv6/ip6_offload.c
parente867e87ae88c54f741d1cabd1de536b4497a0504 (diff)
downloadlinux-07b26c9454a2a19fff86d6fcf2aba6bc801eb8d8.tar.bz2
gso: Support partial splitting at the frag_list pointer
Since commit 8a29111c7 ("net: gro: allow to build full sized skb") gro may build buffers with a frag_list. This can hurt forwarding because most NICs can't offload such packets, they need to be segmented in software. This patch splits buffers with a frag_list at the frag_list pointer into buffers that can be TSO offloaded. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_offload.c')
-rw-r--r--net/ipv6/ip6_offload.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 22e90e56b5a9..e7bfd55899a3 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -69,6 +69,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
int offset = 0;
bool encap, udpfrag;
int nhoff;
+ bool gso_partial;
skb_reset_network_header(skb);
nhoff = skb_network_header(skb) - skb_mac_header(skb);
@@ -101,9 +102,11 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
if (IS_ERR(segs))
goto out;
+ gso_partial = !!(skb_shinfo(segs)->gso_type & SKB_GSO_PARTIAL);
+
for (skb = segs; skb; skb = skb->next) {
ipv6h = (struct ipv6hdr *)(skb_mac_header(skb) + nhoff);
- if (skb_is_gso(skb))
+ if (gso_partial)
payload_len = skb_shinfo(skb)->gso_size +
SKB_GSO_CB(skb)->data_offset +
skb->head - (unsigned char *)(ipv6h + 1);