diff options
| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2018-01-17 12:05:36 +0100 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-01-18 22:12:38 +0100 |
| commit | cb5f7334d479414adc6afe60105283277e297489 (patch) | |
| tree | 4f64b36c2ef1d8fa30c74a9bd262a247e33e14c9 /include | |
| parent | bpf: change fake_ip for bpf_trace_printk helper (diff) | |
| download | linux-dev-cb5f7334d479414adc6afe60105283277e297489.tar.xz linux-dev-cb5f7334d479414adc6afe60105283277e297489.zip | |
bpf: add comments to BPF ld/ldx sizes
Doc BPF ld/ldx size defines as comments in code, as it makes in
faster to lookup in a programming/review setting, than looking up
the sizes in Documentation/networking/filter.txt.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/bpf_common.h | 7 |
2 files changed, 5 insertions, 4 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 7c2259e8bc54..74dc4dc98681 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -17,7 +17,7 @@ #define BPF_ALU64 0x07 /* alu mode in double word width */ /* ld/ldx fields */ -#define BPF_DW 0x18 /* double word */ +#define BPF_DW 0x18 /* double word (64-bit) */ #define BPF_XADD 0xc0 /* exclusive add */ /* alu/jmp fields */ diff --git a/include/uapi/linux/bpf_common.h b/include/uapi/linux/bpf_common.h index 18be90725ab0..ee97668bdadb 100644 --- a/include/uapi/linux/bpf_common.h +++ b/include/uapi/linux/bpf_common.h @@ -15,9 +15,10 @@ /* ld/ldx fields */ #define BPF_SIZE(code) ((code) & 0x18) -#define BPF_W 0x00 -#define BPF_H 0x08 -#define BPF_B 0x10 +#define BPF_W 0x00 /* 32-bit */ +#define BPF_H 0x08 /* 16-bit */ +#define BPF_B 0x10 /* 8-bit */ +/* eBPF BPF_DW 0x18 64-bit */ #define BPF_MODE(code) ((code) & 0xe0) #define BPF_IMM 0x00 #define BPF_ABS 0x20 |