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bpf: use skb_pkt_type_ok helper in bpf_skb_change_type

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Since we have a skb_pkt_type_ok() helper for checking the type before
mangling, make use of it instead of open coding. Follow-up to commit
8b10cab64c ("net: simplify and make pkt_type_ok() available for other
users") that came in after d2485c4242 ("bpf: add bpf_skb_change_type
helper").

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2016-08-18 01:00:38 +02:00 committed by David S. Miller
parent b34040227b
commit 45c7fffaf7
1 changed files with 2 additions and 2 deletions
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4
net/core/filter.c
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@ -1976,8 +1976,8 @@ static u64 bpf_skb_change_type(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5)
u32 pkt_type = r2;
/* We only allow a restricted subset to be changed for now. */
if (unlikely(skb->pkt_type > PACKET_OTHERHOST ||
pkt_type > PACKET_OTHERHOST))
if (unlikely(!skb_pkt_type_ok(skb->pkt_type) ||
!skb_pkt_type_ok(pkt_type)))
return -EINVAL;
skb->pkt_type = pkt_type;