提交 5e558f9a 编写于 作者: M Martynas Pumputis 提交者: Greg Kroah-Hartman

bpf: simplify definition of BPF_FIB_LOOKUP related flags

commit b1d6c15b9d824a58c5415673f374fac19e8eccdf upstream.

Previously, the BPF_FIB_LOOKUP_{DIRECT,OUTPUT} flags in the BPF UAPI
were defined with the help of BIT macro. This had the following issues:

- In order to use any of the flags, a user was required to depend
  on <linux/bits.h>.
- No other flag in bpf.h uses the macro, so it seems that an unwritten
  convention is to use (1 << (nr)) to define BPF-related flags.

Fixes: 87f5fc7e ("bpf: Provide helper to do forwarding lookups in kernel FIB table")
Signed-off-by: NMartynas Pumputis <m@lambda.lt>
Acked-by: NAndrii Nakryiko <andriin@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 7d2c0ec2
......@@ -2705,8 +2705,8 @@ struct bpf_raw_tracepoint_args {
/* DIRECT: Skip the FIB rules and go to FIB table associated with device
* OUTPUT: Do lookup from egress perspective; default is ingress
*/
#define BPF_FIB_LOOKUP_DIRECT BIT(0)
#define BPF_FIB_LOOKUP_OUTPUT BIT(1)
#define BPF_FIB_LOOKUP_DIRECT (1U << 0)
#define BPF_FIB_LOOKUP_OUTPUT (1U << 1)
enum {
BPF_FIB_LKUP_RET_SUCCESS, /* lookup successful */
......
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