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| author | Daniel Borkmann <daniel@iogearbox.net> | 2017-01-24 01:06:28 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-24 14:46:06 -0500 |
| commit | d1b662adcdb87944b7f6f7bd2f95cbb1404dbf18 (patch) | |
| tree | ce847a4583aff07f03b6218180915d066949d403 /include | |
| parent | 2492d3b867043f6880708d095a7a5d65debcfc32 (diff) | |
| download | linux-stable-d1b662adcdb87944b7f6f7bd2f95cbb1404dbf18.tar.gz linux-stable-d1b662adcdb87944b7f6f7bd2f95cbb1404dbf18.tar.bz2 linux-stable-d1b662adcdb87944b7f6f7bd2f95cbb1404dbf18.zip | |
bpf: allow option for setting bpf_l4_csum_replace from scratch
When programs need to calculate the csum from scratch for small UDP
packets and use bpf_l4_csum_replace() to feed the result from helpers
like bpf_csum_diff(), then we need a flag besides BPF_F_MARK_MANGLED_0
that would ignore the case of current csum being 0, and which would
still allow for the helper to set the csum and transform when needed
to CSUM_MANGLED_0.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index bd3068485410..e07fd5a324e6 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -522,6 +522,7 @@ enum bpf_func_id { /* BPF_FUNC_l4_csum_replace flags. */ #define BPF_F_PSEUDO_HDR (1ULL << 4) #define BPF_F_MARK_MANGLED_0 (1ULL << 5) +#define BPF_F_MARK_ENFORCE (1ULL << 6) /* BPF_FUNC_clone_redirect and BPF_FUNC_redirect flags. */ #define BPF_F_INGRESS (1ULL << 0) |