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ebpf: make internal bpf API independent of CONFIG_BPF_SYSCALL ifdefs

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Socket filter code and other subsystems with upcoming eBPF support should
not need to deal with the fact that we have CONFIG_BPF_SYSCALL defined or
not.

Having the bpf syscall as a config option is a nice thing and I'd expect
it to stay that way for expert users (I presume one day the default setting
of it might change, though), but code making use of it should not care if
it's actually enabled or not.

Instead, hide this via header files and let the rest deal with it.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann 2015-03-01 12:31:44 +01:00 committed by David S. Miller
parent f1a66f85b7
commit 0fc174dea5
1 changed files with 17 additions and 5 deletions
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22
include/linux/bpf.h
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@ -113,8 +113,6 @@ struct bpf_prog_type_list {
enum bpf_prog_type type;
};
void bpf_register_prog_type(struct bpf_prog_type_list *tl);
struct bpf_prog;
struct bpf_prog_aux {
@ -129,11 +127,25 @@ struct bpf_prog_aux {
};
#ifdef CONFIG_BPF_SYSCALL
void bpf_register_prog_type(struct bpf_prog_type_list *tl);
void bpf_prog_put(struct bpf_prog *prog);
#else
static inline void bpf_prog_put(struct bpf_prog *prog) {}
#endif
struct bpf_prog *bpf_prog_get(u32 ufd);
#else
static inline void bpf_register_prog_type(struct bpf_prog_type_list *tl)
{
}
static inline struct bpf_prog *bpf_prog_get(u32 ufd)
{
return ERR_PTR(-EOPNOTSUPP);
}
static inline void bpf_prog_put(struct bpf_prog *prog)
{
}
#endif
/* verify correctness of eBPF program */
int bpf_check(struct bpf_prog *fp, union bpf_attr *attr);