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selftests/bpf: Add bpf_percpu_obj_{new,drop}() macro in bpf_experimental.h

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The new macro bpf_percpu_obj_{new/drop}() is very similar to bpf_obj_{new,drop}()
as they both take a type as the argument.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20230827152805.1999417-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2023-08-27 08:28:05 -07:00 committed by Alexei Starovoitov
parent ed5285a148
commit 968c76cb3d
1 changed files with 31 additions and 0 deletions
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31
tools/testing/selftests/bpf/bpf_experimental.h
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@ -131,4 +131,35 @@ extern int bpf_rbtree_add_impl(struct bpf_rb_root *root, struct bpf_rb_node *nod
*/
extern struct bpf_rb_node *bpf_rbtree_first(struct bpf_rb_root *root) __ksym;
/* Description
* Allocates a percpu object of the type represented by 'local_type_id' in
* program BTF. User may use the bpf_core_type_id_local macro to pass the
* type ID of a struct in program BTF.
*
* The 'local_type_id' parameter must be a known constant.
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* A pointer to a percpu object of the type corresponding to the passed in
* 'local_type_id', or NULL on failure.
*/
extern void *bpf_percpu_obj_new_impl(__u64 local_type_id, void *meta) __ksym;
/* Convenience macro to wrap over bpf_percpu_obj_new_impl */
#define bpf_percpu_obj_new(type) ((type __percpu_kptr *)bpf_percpu_obj_new_impl(bpf_core_type_id_local(type), NULL))
/* Description
* Free an allocated percpu object. All fields of the object that require
* destruction will be destructed before the storage is freed.
*
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* Void.
*/
extern void bpf_percpu_obj_drop_impl(void *kptr, void *meta) __ksym;
/* Convenience macro to wrap over bpf_obj_drop_impl */
#define bpf_percpu_obj_drop(kptr) bpf_percpu_obj_drop_impl(kptr, NULL)
#endif