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| author | Timo Teräs <timo.teras@iki.fi> | 2010-03-20 02:27:58 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 16:02:06 -0700 |
| commit | 03017375b0122453e6dda833ff7bd4191915def5 (patch) | |
| tree | 4a9c7e5428248dfb5bbd924d5f1b8186e3b1ac0b | |
| parent | 8fc51479fb9f3b9b06e65ce266488bae55c2965a (diff) | |
ip_gre: include route header_len in max_headroom calculation
[ Upstream commit 243aad830e8a4cdda261626fbaeddde16b08d04a ]
Taking route's header_len into account, and updating gre device
needed_headroom will give better hints on upper bound of required
headroom. This is useful if the gre traffic is xfrm'ed.
Signed-off-by: Timo Teras <timo.teras@iki.fi>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/ipv4/ip_gre.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index f36ce156cac..68c14547808 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -810,11 +810,13 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev tunnel->err_count = 0; } - max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen; + max_headroom = LL_RESERVED_SPACE(tdev) + gre_hlen + rt->u.dst.header_len; if (skb_headroom(skb) < max_headroom || skb_shared(skb)|| (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); + if (max_headroom > dev->needed_headroom) + dev->needed_headroom = max_headroom; if (!new_skb) { ip_rt_put(rt); txq->tx_dropped++; |