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| author | Alexei Starovoitov | 2015-05-28 00:30:39 +0200 |
|---|---|---|
| committer | David S. Miller | 2015-05-31 02:51:13 +0200 |
| commit | 37e82c2f974b72c9ab49c787ef7b5bb1aec12768 (patch) | |
| tree | 9d998b6f8ae66f6e50c48fff7136c3b93a157021 /include/uapi/linux/bpf.h | |
| parent | hv_netvsc: Properly size the vrss queues (diff) | |
| download | kernel-qcow2-linux-37e82c2f974b72c9ab49c787ef7b5bb1aec12768.tar.gz kernel-qcow2-linux-37e82c2f974b72c9ab49c787ef7b5bb1aec12768.tar.xz kernel-qcow2-linux-37e82c2f974b72c9ab49c787ef7b5bb1aec12768.zip | |
bpf: allow BPF programs access skb->skb_iif and skb->dev->ifindex fields
classic BPF already exposes skb->dev->ifindex via SKF_AD_IFINDEX extension.
Allow eBPF program to access it as well. Note that classic aborts execution
of the program if 'skb->dev == NULL' (which is inconvenient for program
writers), whereas eBPF returns zero in such case.
Also expose the 'skb_iif' field, since programs triggered by redirected
packet need to known the original interface index.
Summary:
__skb->ifindex -> skb->dev->ifindex
__skb->ingress_ifindex -> skb->skb_iif
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/bpf.h')
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index f0a9af8b4dae..72f3080afa1e 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -236,6 +236,8 @@ struct __sk_buff { __u32 vlan_tci; __u32 vlan_proto; __u32 priority; + __u32 ingress_ifindex; + __u32 ifindex; }; #endif /* _UAPI__LINUX_BPF_H__ */ |