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authorDaniel Borkmann <dborkman@redhat.com>2013-03-19 06:39:30 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-20 13:15:45 -0400
commitf77668dc25b27270fe589031b22c432c3462b1d8 (patch)
tree99e8e81cccb347d42d0edf2a72715b2dc0796a89 /include/linux
parent61816596d1c9026d0ecb20c44f90452c41596ffe (diff)
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net: flow_dissector: add __skb_get_poff to get a start offset to payload
__skb_get_poff() returns the offset to the payload as far as it could be dissected. The main user is currently BPF, so that we can dynamically truncate packets without needing to push actual payload to the user space and instead can analyze headers only. Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/skbuff.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index b66ecc6ef102..497412165b1c 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2840,6 +2840,8 @@ static inline void skb_checksum_none_assert(const struct sk_buff *skb)
bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
+u32 __skb_get_poff(const struct sk_buff *skb);
+
/**
* skb_head_is_locked - Determine if the skb->head is locked down
* @skb: skb to check