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libbpf: Add bpf_object__token_fd accessor

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Add a LIBBPF_API function to retrieve the token_fd from a bpf_object.

Without this accessor, if user needs a token FD they have to get it
manually via bpf_token_create, even though a token might have been
already created by bpf_object__load.

Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Ihor Solodrai <ihor.solodrai@pm.me>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240913001858.3345583-1-ihor.solodrai@pm.me
This commit is contained in:
Ihor Solodrai 2024-09-13 00:19:02 +00:00 committed by Andrii Nakryiko
parent 6182e0b80f
commit ea02a94687
3 changed files with 14 additions and 0 deletions
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5
tools/lib/bpf/libbpf.c
View File

@ -9059,6 +9059,11 @@ unsigned int bpf_object__kversion(const struct bpf_object *obj)
return obj ? obj->kern_version : 0;
}
int bpf_object__token_fd(const struct bpf_object *obj)
{
return obj->token_fd ?: -1;
}
struct btf *bpf_object__btf(const struct bpf_object *obj)
{
return obj ? obj->btf : NULL;

8
tools/lib/bpf/libbpf.h
View File

@ -294,6 +294,14 @@ LIBBPF_API const char *bpf_object__name(const struct bpf_object *obj);
LIBBPF_API unsigned int bpf_object__kversion(const struct bpf_object *obj);
LIBBPF_API int bpf_object__set_kversion(struct bpf_object *obj, __u32 kern_version);
/**
* @brief **bpf_object__token_fd** is an accessor for BPF token FD associated
* with BPF object.
* @param obj Pointer to a valid BPF object
* @return BPF token FD or -1, if it wasn't set
*/
LIBBPF_API int bpf_object__token_fd(const struct bpf_object *obj);
struct btf;
LIBBPF_API struct btf *bpf_object__btf(const struct bpf_object *obj);
LIBBPF_API int bpf_object__btf_fd(const struct bpf_object *obj);

1
tools/lib/bpf/libbpf.map
View File

@ -423,6 +423,7 @@ LIBBPF_1.5.0 {
btf__relocate;
bpf_map__autoattach;
bpf_map__set_autoattach;
bpf_object__token_fd;
bpf_program__attach_sockmap;
ring__consume_n;
ring_buffer__consume_n;