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Commit cb5f7334 authored by Jesper Dangaard Brouer's avatar Jesper Dangaard Brouer Committed by Daniel Borkmann
Browse files

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: default avatarJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent eefa864a

include/uapi/linux/bpf.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */

include/uapi/linux/bpf_common.h

+4 −3
Original line number Diff line number Diff line
@@ -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