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tools/libbpf: Add support for bpf map element iterator

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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
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Yonghong Song authored and Andrii Nakryiko committed 2020-07-28 14:03:17 -07:00
1 parent b1720407ff
commit 5efd8395ef
4 files changed
+14 -3
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src/bpf.h
+2 -1
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@@ -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,