diff options
author | Martin KaFai Lau <kafai@fb.com> | 2016-12-07 15:53:11 -0800 |
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committer | David S. Miller <davem@davemloft.net> | 2016-12-08 14:25:13 -0500 |
commit | 17bedab2723145d17b14084430743549e6943d03 (patch) | |
tree | 6a1517e36c1be543f591b5ff7fcd7e816dcc906a /kernel/bpf/verifier.c | |
parent | 8a03cf2cb7efe269913db079afb8c31f20bf0bef (diff) | |
download | op-kernel-dev-17bedab2723145d17b14084430743549e6943d03.zip op-kernel-dev-17bedab2723145d17b14084430743549e6943d03.tar.gz |
bpf: xdp: Allow head adjustment in XDP prog
This patch allows XDP prog to extend/remove the packet
data at the head (like adding or removing header). It is
done by adding a new XDP helper bpf_xdp_adjust_head().
It also renames bpf_helper_changes_skb_data() to
bpf_helper_changes_pkt_data() to better reflect
that XDP prog does not work on skb.
This patch adds one "xdp_adjust_head" bit to bpf_prog for the
XDP-capable driver to check if the XDP prog requires
bpf_xdp_adjust_head() support. The driver can then decide
to error out during XDP_SETUP_PROG.
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/verifier.c')
-rw-r--r-- | kernel/bpf/verifier.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 5b14f85..d28f9a3 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1216,7 +1216,7 @@ static int check_call(struct bpf_verifier_env *env, int func_id) return -EINVAL; } - changes_data = bpf_helper_changes_skb_data(fn->func); + changes_data = bpf_helper_changes_pkt_data(fn->func); memset(&meta, 0, sizeof(meta)); meta.pkt_access = fn->pkt_access; |