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ipv4: gso: make inet_gso_segment() stackable

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In order to support GSO on IPIP, we need to make
inet_gso_segment() stackable.

It should not assume network header starts right after mac
header.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-10-19 11:42:56 -07:00 • committed by David S. Miller
commit 3347c96029
3 changed files with 25 additions and 9 deletions
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7
include/linux/skbuff.h
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@ -2722,9 +2722,12 @@ static inline struct sec_path *skb_sec_path(struct sk_buff *skb)
/* Keeps track of mac header offset relative to skb->head.
* It is useful for TSO of Tunneling protocol. e.g. GRE.
* For non-tunnel skb it points to skb_mac_header() and for
* tunnel skb it points to outer mac header. */
* tunnel skb it points to outer mac header.
* Keeps track of level of encapsulation of network headers.
*/
struct skb_gso_cb {
int mac_offset;
int mac_offset;
int encap_level;
};
#define SKB_GSO_CB(skb) ((struct skb_gso_cb *)(skb)->cb)