Commit 09d7c2e3 authored by Quentin Monnet's avatar Quentin Monnet Committed by Alexei Starovoitov
Browse files

libbpf: add bpf_btf_get_next_id() to cycle through BTF objects 



Add an API function taking a BTF object id and providing the id of the
next BTF object in the kernel. This can be used to list all BTF objects
loaded on the system.

v2:
- Rebase on top of Andrii's changes regarding libbpf versioning.

Signed-off-by: default avatarQuentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent a6e130c4

tools/lib/bpf/bpf.c

+5 −0
Original line number Diff line number Diff line
@@ -593,6 +593,11 @@ int bpf_map_get_next_id(__u32 start_id, __u32 *next_id) 
	return bpf_obj_get_next_id(start_id, next_id, BPF_MAP_GET_NEXT_ID);

}



int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id)

{

	return bpf_obj_get_next_id(start_id, next_id, BPF_BTF_GET_NEXT_ID);

}



int bpf_prog_get_fd_by_id(__u32 id)

{

	union bpf_attr attr;

tools/lib/bpf/bpf.h

+1 −0
Original line number Diff line number Diff line
@@ -156,6 +156,7 @@ LIBBPF_API int bpf_prog_test_run(int prog_fd, int repeat, void *data, 
				 __u32 *retval, __u32 *duration);

LIBBPF_API int bpf_prog_get_next_id(__u32 start_id, __u32 *next_id);

LIBBPF_API int bpf_map_get_next_id(__u32 start_id, __u32 *next_id);

LIBBPF_API int bpf_btf_get_next_id(__u32 start_id, __u32 *next_id);

LIBBPF_API int bpf_prog_get_fd_by_id(__u32 id);

LIBBPF_API int bpf_map_get_fd_by_id(__u32 id);

LIBBPF_API int bpf_btf_get_fd_by_id(__u32 id);

tools/lib/bpf/libbpf.map

+2 −0
Original line number Diff line number Diff line
@@ -186,4 +186,6 @@ LIBBPF_0.0.4 { 
} LIBBPF_0.0.3;



LIBBPF_0.0.5 {

	global:

		bpf_btf_get_next_id;

} LIBBPF_0.0.4;

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