tools/libbpf: Add support for bpf map element iterator

Add map_fd to bpf_iter_attach_opts and flags to
bpf_link_create_opts. Later on, bpftool or selftest
will be able to create a bpf map element iterator
by passing map_fd to the kernel during link
creation time.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200723184117.590673-1-yhs@fb.com
This commit is contained in:
Yonghong Song
2020-07-23 11:41:17 -07:00
committed by Andrii Nakryiko
parent b1720407ff
commit 5efd8395ef
4 changed files with 14 additions and 3 deletions

View File

@@ -170,8 +170,9 @@ LIBBPF_API int bpf_prog_detach2(int prog_fd, int attachable_fd,
struct bpf_link_create_opts {
size_t sz; /* size of this struct for forward/backward compatibility */
__u32 flags;
};
#define bpf_link_create_opts__last_field sz
#define bpf_link_create_opts__last_field flags
LIBBPF_API int bpf_link_create(int prog_fd, int target_fd,
enum bpf_attach_type attach_type,