[RFC PATCH v2 25/37] tools lib bpf: accessors for struct bpf_object.

[Wang Nan]

This patch add an accessor which allows caller to get count of programs
in an object file.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
---
 tools/lib/bpf/libbpf.c | 9 +++++++++
 tools/lib/bpf/libbpf.h | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index d770adc..89c725a 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -964,6 +964,15 @@ void bpf_close_object(struct bpf_object *obj)
 	free(obj);
 }
 
+int bpf_obj_get_prog_cnt(struct bpf_object *obj, size_t *pcnt)
+{
+	if (!obj || !pcnt)
+		return -EINVAL;
+
+	*pcnt = obj->nr_programs;
+	return 0;
+}
+
 static inline struct bpf_program *
 handler_to_prog(struct bpf_prog_handler *handler)
 {
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index b451d1a..31ff5d9 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -26,6 +26,9 @@ void bpf_close_object(struct bpf_object *object);
 int bpf_load_object(struct bpf_object *obj);
 int bpf_unload_object(struct bpf_object *obj);
 
+/* Accessors of bpf_object */
+int bpf_obj_get_prog_cnt(struct bpf_object *obj, size_t *pcnt);
+
 /* Accessors of bpf_program. */
 struct bpf_prog_handler;
 struct bpf_prog_handler *bpf_next_prog(struct bpf_object *obj,
-- 
1.8.3.4

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