Commit 5d0cbf9b authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by David S. Miller
Browse files

libbpf: add support for BPF_PROG_QUERY 



add support for BPF_PROG_QUERY command to libbpf

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent defd9c47

tools/lib/bpf/bpf.c

+20 −0
Original line number Diff line number Diff line
@@ -303,6 +303,26 @@ int bpf_prog_detach2(int prog_fd, int target_fd, enum bpf_attach_type type) 
	return sys_bpf(BPF_PROG_DETACH, &attr, sizeof(attr));

}



int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,

		   __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt)

{

	union bpf_attr attr;

	int ret;



	bzero(&attr, sizeof(attr));

	attr.query.target_fd	= target_fd;

	attr.query.attach_type	= type;

	attr.query.query_flags	= query_flags;

	attr.query.prog_cnt	= *prog_cnt;

	attr.query.prog_ids	= ptr_to_u64(prog_ids);



	ret = sys_bpf(BPF_PROG_QUERY, &attr, sizeof(attr));

	if (attach_flags)

		*attach_flags = attr.query.attach_flags;

	*prog_cnt = attr.query.prog_cnt;

	return ret;

}



int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,

		      void *data_out, __u32 *size_out, __u32 *retval,

		      __u32 *duration)

tools/lib/bpf/bpf.h

+2 −1
Original line number Diff line number Diff line
@@ -75,5 +75,6 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id); 
int bpf_prog_get_fd_by_id(__u32 id);

int bpf_map_get_fd_by_id(__u32 id);

int bpf_obj_get_info_by_fd(int prog_fd, void *info, __u32 *info_len);



int bpf_prog_query(int target_fd, enum bpf_attach_type type, __u32 query_flags,

		   __u32 *attach_flags, __u32 *prog_ids, __u32 *prog_cnt);

#endif