Add a small and generic LIBBPF_OPTS_CLEAR() helper macros which clears
an opts structure and reinitializes its .sz member to place the structure
size. I found this very useful when developing selftests, but it is also
generic enough as a macro next to the existing LIBBPF_OPTS() which hides
the .sz initialization, too.
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
---
tools/lib/bpf/libbpf_common.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/tools/lib/bpf/libbpf_common.h b/tools/lib/bpf/libbpf_common.h
index 9a7937f339df..eb180023aa97 100644
--- a/tools/lib/bpf/libbpf_common.h
+++ b/tools/lib/bpf/libbpf_common.h
@@ -70,4 +70,15 @@
}; \
})
+/* Helper macro to clear a libbpf options struct
+ *
+ * Small helper macro to reset all fields and to reinitialize the common
+ * structure size member.
+ */
+#define LIBBPF_OPTS_CLEAR(NAME) \
+ do { \
+ memset(&NAME, 0, sizeof(NAME)); \
+ NAME.sz = sizeof(NAME); \
+ } while (0)
+
#endif /* __LIBBPF_LIBBPF_COMMON_H */
--
2.34.1
