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bpf: remove struct bpf_prog_type_list

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There's no need to have struct bpf_prog_type_list since
it just contains a list_head, the type, and the ops
pointer. Since the types are densely packed and not
actually dynamically registered, it's much easier and
smaller to have an array of type->ops pointer. Also
initialize this array statically to remove code needed
to initialize it.

In order to save duplicating the list, move it to a new
header file and include it in the places needing it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2017-04-11 15:34:57 +02:00 • committed by David S. Miller
parent 98601e8bc6
commit be9370a7d8
5 changed files with 44 additions and 122 deletions
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16
include/linux/bpf.h
View file

@ -173,12 +173,6 @@ struct bpf_verifier_ops {
union bpf_attr __user *uattr);
};
struct bpf_prog_type_list {
struct list_head list_node;
const struct bpf_verifier_ops *ops;
enum bpf_prog_type type;
};
struct bpf_prog_aux {
atomic_t refcnt;
u32 used_map_cnt;
@ -243,7 +237,11 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
#ifdef CONFIG_BPF_SYSCALL
DECLARE_PER_CPU(int, bpf_prog_active);
void bpf_register_prog_type(struct bpf_prog_type_list *tl);
#define BPF_PROG_TYPE(_id, _ops) \
extern const struct bpf_verifier_ops _ops;
#include <linux/bpf_types.h>
#undef BPF_PROG_TYPE
void bpf_register_map_type(struct bpf_map_type_list *tl);
struct bpf_prog *bpf_prog_get(u32 ufd);
@ -306,10 +304,6 @@ static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
/* verify correctness of eBPF program */
int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
#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);