Commit 343949e1 authored by Benjamin Tissoires's avatar Benjamin Tissoires Committed by Alexei Starovoitov
Browse files

libbpf: add map_get_fd_by_id and map_delete_elem in light skeleton 



This allows to have a better control over maps from the kernel when
preloading eBPF programs.

Acked-by: default avatarYonghong Song <yhs@fb.com>
Signed-off-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20220824134055.1328882-8-benjamin.tissoires@redhat.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent b88df697

tools/lib/bpf/skel_internal.h

+23 −0
Original line number Diff line number Diff line
@@ -251,6 +251,29 @@ static inline int skel_map_update_elem(int fd, const void *key, 
	return skel_sys_bpf(BPF_MAP_UPDATE_ELEM, &attr, attr_sz);

}



static inline int skel_map_delete_elem(int fd, const void *key)

{

	const size_t attr_sz = offsetofend(union bpf_attr, flags);

	union bpf_attr attr;



	memset(&attr, 0, attr_sz);

	attr.map_fd = fd;

	attr.key = (long)key;



	return skel_sys_bpf(BPF_MAP_DELETE_ELEM, &attr, attr_sz);

}



static inline int skel_map_get_fd_by_id(__u32 id)

{

	const size_t attr_sz = offsetofend(union bpf_attr, flags);

	union bpf_attr attr;



	memset(&attr, 0, attr_sz);

	attr.map_id = id;



	return skel_sys_bpf(BPF_MAP_GET_FD_BY_ID, &attr, attr_sz);

}



static inline int skel_raw_tracepoint_open(const char *name, int prog_fd)

{

	const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint.prog_fd);