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libbpf: Add bpf_object__unpin()

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For bpf_object__pin_programs() there is bpf_object__unpin_programs().
Likewise bpf_object__unpin_maps() for bpf_object__pin_maps().

But no bpf_object__unpin() for bpf_object__pin(). Adding the former adds
symmetry to the API.

It's also convenient for cleanup in application code. It's an API I
would've used if it was available for a repro I was writing earlier.

Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/bpf/b2f9d41da4a350281a0b53a804d11b68327e14e5.1692832478.git.dxu@dxuuu.xyz
This commit is contained in:
Daniel Xu 2023-08-23 17:15:02 -06:00 committed by Andrii Nakryiko
parent f586a77030
commit 068ca522d5
3 changed files with 17 additions and 0 deletions
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15
tools/lib/bpf/libbpf.c
View File

@ -8376,6 +8376,21 @@ int bpf_object__pin(struct bpf_object *obj, const char *path)
return 0;
}
int bpf_object__unpin(struct bpf_object *obj, const char *path)
{
int err;
err = bpf_object__unpin_programs(obj, path);
if (err)
return libbpf_err(err);
err = bpf_object__unpin_maps(obj, path);
if (err)
return libbpf_err(err);
return 0;
}
static void bpf_map__destroy(struct bpf_map *map)
{
if (map->inner_map) {

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

@ -266,6 +266,7 @@ LIBBPF_API int bpf_object__pin_programs(struct bpf_object *obj,
LIBBPF_API int bpf_object__unpin_programs(struct bpf_object *obj,
const char *path);
LIBBPF_API int bpf_object__pin(struct bpf_object *object, const char *path);
LIBBPF_API int bpf_object__unpin(struct bpf_object *object, const char *path);
LIBBPF_API const char *bpf_object__name(const struct bpf_object *obj);
LIBBPF_API unsigned int bpf_object__kversion(const struct bpf_object *obj);

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

@ -395,6 +395,7 @@ LIBBPF_1.2.0 {
LIBBPF_1.3.0 {
global:
bpf_obj_pin_opts;
bpf_object__unpin;
bpf_prog_detach_opts;
bpf_program__attach_netfilter;
bpf_program__attach_tcx;