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| author |   Daniel Borkmann <dborkman@redhat.com> | 2014-05-01 18:34:18 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-05-04 19:46:31 -0400 |
| commit | 5bcfedf06f7fdf9efcf65dc11198e9012f7530f4 (patch) | |
| tree | 378e4f903661c6fec7c5ca864970df3e3458165a /include | |
| parent | net: filter: doc: expand and improve BPF documentation (diff) | |
| download | linux-dev-5bcfedf06f7fdf9efcf65dc11198e9012f7530f4.tar.xz linux-dev-5bcfedf06f7fdf9efcf65dc11198e9012f7530f4.zip | |
net: filter: simplify label names from jump-table
This patch simplifies label naming for the BPF jump-table.
When we define labels via DL(), we just concatenate/textify
the combination of instruction opcode which consists of the
class, subclass, word size, target register and so on. Each
time we leave BPF_ prefix intact, so that e.g. the preprocessor
generates a label BPF_ALU_BPF_ADD_BPF_X for DL(BPF_ALU, BPF_ADD,
BPF_X) whereas a label name of ALU_ADD_X is much more easy
to grasp. Pure cleanup only.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/filter.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h index 759abf78dd61..b042d1db127f 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -37,6 +37,9 @@ #define BPF_CALL 0x80 /* function call */ #define BPF_EXIT 0x90 /* function return */ +/* Placeholder/dummy for 0 */ +#define BPF_0 0 + /* BPF has 10 general purpose 64-bit registers and stack frame. */ #define MAX_BPF_REG 11 |