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| author | Eric Dumazet <edumazet@google.com> | 2016-04-30 20:19:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-03 07:22:19 +0300 |
| commit | 9580bf2edb402b3afaf9c5a4efb6953f993ef52e (patch) | |
| tree | ead375015918eb32b6ad7cb73a00a5567b8378ed /net/ipv4/ip_tunnel_core.c | |
| parent | c0ef079ca791ef9e057ac748051425a768c9e192 (diff) | |
| download | linux-9580bf2edb402b3afaf9c5a4efb6953f993ef52e.tar.xz | |
net: relax expensive skb_unclone() in iptunnel_handle_offloads()
Locally generated TCP GSO packets having to go through a GRE/SIT/IPIP
tunnel have to go through an expensive skb_unclone()
Reallocating skb->head is a lot of work.
Test should really check if a 'real clone' of the packet was done.
TCP does not care if the original gso_type is changed while the packet
travels in the stack.
This adds skb_header_unclone() which is a variant of skb_clone()
using skb_header_cloned() check instead of skb_cloned().
This variant can probably be used from other points.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_tunnel_core.c')
| -rw-r--r-- | net/ipv4/ip_tunnel_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index 786fa7ca28e0..9118b0e640ba 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -157,7 +157,7 @@ int iptunnel_handle_offloads(struct sk_buff *skb, } if (skb_is_gso(skb)) { - err = skb_unclone(skb, GFP_ATOMIC); + err = skb_header_unclone(skb, GFP_ATOMIC); if (unlikely(err)) return err; skb_shinfo(skb)->gso_type |= gso_type_mask; |