| From | Ben Hutchings <> | Date | Sun, 09 Dec 2018 21:50:33 +0000 | Subject | [PATCH 3.16 241/328] bpf, net: add skb_mac_header_len helper |
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3.16.62-rc1 review patch. If anyone has any objections, please let me know.
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From: Daniel Borkmann <daniel@iogearbox.net>
commit 0daf4349406074fc03e4889ba5e97e6fb5311bab upstream.
Add a small skb_mac_header_len() helper similarly as the skb_network_header_len() we have and replace open coded places in BPF's bpf_skb_change_proto() helper. Will also be used in upcoming work.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> [bwh: Backported to 3.16: drop changes in bpf] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1801,6 +1801,11 @@ static inline unsigned char *skb_mac_hea return skb->head + skb->mac_header; } +static inline u32 skb_mac_header_len(const struct sk_buff *skb) +{ + return skb->network_header - skb->mac_header; +} + static inline int skb_mac_header_was_set(const struct sk_buff *skb) { return skb->mac_header != (typeof(skb->mac_header))~0U;
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