From patchwork Sun Aug 27 15:28:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yonghong Song X-Patchwork-Id: 13367301 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 03E647EE for ; Sun, 27 Aug 2023 15:28:22 +0000 (UTC) Received: from 66-220-155-179.mail-mxout.facebook.com (66-220-155-179.mail-mxout.facebook.com [66.220.155.179]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D30A2EC for ; Sun, 27 Aug 2023 08:28:20 -0700 (PDT) Received: by devbig309.ftw3.facebook.com (Postfix, from userid 128203) id 5BF14257ECF93; Sun, 27 Aug 2023 08:28:05 -0700 (PDT) From: Yonghong Song To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , kernel-team@fb.com, Martin KaFai Lau Subject: [PATCH bpf-next v3 07/13] selftests/bpf: Add bpf_percpu_obj_{new,drop}() macro in bpf_experimental.h Date: Sun, 27 Aug 2023 08:28:05 -0700 Message-Id: <20230827152805.1999417-1-yonghong.song@linux.dev> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230827152729.1995219-1-yonghong.song@linux.dev> References: <20230827152729.1995219-1-yonghong.song@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,RDNS_DYNAMIC,SPF_HELO_PASS,SPF_SOFTFAIL, TVD_RCVD_IP autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net 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 --- .../testing/selftests/bpf/bpf_experimental.h | 31 +++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/tools/testing/selftests/bpf/bpf_experimental.h b/tools/testing/selftests/bpf/bpf_experimental.h index 209811b1993a..4494eaa9937e 100644 --- a/tools/testing/selftests/bpf/bpf_experimental.h +++ b/tools/testing/selftests/bpf/bpf_experimental.h @@ -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