netdev - [PATCH v3 bpf-next 2/3] libbpf: introduce bpf_prog_test_run_xattr

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Date:   Wed, 23 Sep 2020 14:33:36 -0700
From:   Song Liu <songliubraving@...com>
To:     <netdev@...r.kernel.org>, <bpf@...r.kernel.org>
CC:     <kernel-team@...com>, <ast@...nel.org>, <daniel@...earbox.net>,
        <john.fastabend@...il.com>, <kpsingh@...omium.org>,
        Song Liu <songliubraving@...com>
Subject: [PATCH v3 bpf-next 2/3] libbpf: introduce bpf_prog_test_run_xattr_opts

This API supports new field cpu_plus in bpf_attr.test.

Acked-by: John Fastabend <john.fastabend@...il.com>
Signed-off-by: Song Liu <songliubraving@...com>
---
 tools/lib/bpf/bpf.c      | 13 ++++++++++++-
 tools/lib/bpf/bpf.h      | 11 +++++++++++
 tools/lib/bpf/libbpf.map |  1 +
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 2baa1308737c8..3228dd60fa32f 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -684,7 +684,8 @@ int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
 	return ret;
 }
 
-int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
+int bpf_prog_test_run_xattr_opts(struct bpf_prog_test_run_attr *test_attr,
+				 const struct bpf_prog_test_run_opts *opts)
 {
 	union bpf_attr attr;
 	int ret;
@@ -693,6 +694,11 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 		return -EINVAL;
 
 	memset(&attr, 0, sizeof(attr));
+	if (opts) {
+		if (!OPTS_VALID(opts, bpf_prog_test_run_opts))
+			return -EINVAL;
+		attr.test.cpu_plus = opts->cpu_plus;
+	}
 	attr.test.prog_fd = test_attr->prog_fd;
 	attr.test.data_in = ptr_to_u64(test_attr->data_in);
 	attr.test.data_out = ptr_to_u64(test_attr->data_out);
@@ -712,6 +718,11 @@ int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
 	return ret;
 }
 
+int bpf_prog_test_run_xattr(struct bpf_prog_test_run_attr *test_attr)
+{
+	return bpf_prog_test_run_xattr_opts(test_attr, NULL);
+}
+
 static int bpf_obj_get_next_id(__u32 start_id, __u32 *next_id, int cmd)
 {
 	union bpf_attr attr;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 8c1ac4b42f908..61318f47c8e1b 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -251,6 +251,17 @@ struct bpf_prog_bind_opts {
 
 LIBBPF_API int bpf_prog_bind_map(int prog_fd, int map_fd,
 				 const struct bpf_prog_bind_opts *opts);
+
+struct bpf_prog_test_run_opts {
+	size_t sz; /* size of this struct for forward/backward compatibility */
+	__u32 cpu_plus;
+};
+#define bpf_prog_test_run_opts__last_field cpu_plus
+
+LIBBPF_API
+int bpf_prog_test_run_xattr_opts(struct bpf_prog_test_run_attr *test_attr,
+				 const struct bpf_prog_test_run_opts *opts);
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 5f054dadf0829..c84a8bec57634 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -303,6 +303,7 @@ LIBBPF_0.1.0 {
 LIBBPF_0.2.0 {
 	global:
 		bpf_prog_bind_map;
+		bpf_prog_test_run_xattr_opts;
 		bpf_program__section_name;
 		perf_buffer__buffer_cnt;
 		perf_buffer__buffer_fd;
-- 
2.24.1