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| author |   David S. Miller <davem@davemloft.net> | 2017-05-01 12:43:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-01 12:43:49 -0700 |
| commit | bc1bafbbe9b3558d7789ff151ef4f185b6ad21f3 (patch) | |
| tree | 33a8d0dd917e4f46705bc024b4f72500238b87d8 /tools/testing/selftests/bpf/bpf_endian.h | |
| parent | ipv6: Need to export ipv6_push_frag_opts for tunneling now. (diff) | |
| download | linux-dev-bc1bafbbe9b3558d7789ff151ef4f185b6ad21f3.tar.xz linux-dev-bc1bafbbe9b3558d7789ff151ef4f185b6ad21f3.zip | |
bpf: Move endianness BPF helpers out of bpf_util.h
We do not want to include things like stdio.h and friends into
eBPF program builds. bpf_util.h is for host compiled programs,
so eBPF C-code helpers don't really belong there.
Add a new bpf_endian.h as a quick fix for this for now.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/bpf/bpf_endian.h')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_endian.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/bpf_endian.h b/tools/testing/selftests/bpf/bpf_endian.h new file mode 100644 index 000000000000..19d0604f8694 --- /dev/null +++ b/tools/testing/selftests/bpf/bpf_endian.h @@ -0,0 +1,23 @@ +#ifndef __BPF_ENDIAN__ +#define __BPF_ENDIAN__ + +#include <asm/byteorder.h> + +#if __BYTE_ORDER == __LITTLE_ENDIAN +# define __bpf_ntohs(x) __builtin_bswap16(x) +# define __bpf_htons(x) __builtin_bswap16(x) +#elif __BYTE_ORDER == __BIG_ENDIAN +# define __bpf_ntohs(x) (x) +# define __bpf_htons(x) (x) +#else +# error "Fix your __BYTE_ORDER?!" +#endif + +#define bpf_htons(x) \ + (__builtin_constant_p(x) ? \ + __constant_htons(x) : __bpf_htons(x)) +#define bpf_ntohs(x) \ + (__builtin_constant_p(x) ? \ + __constant_ntohs(x) : __bpf_ntohs(x)) + +#endif |