bpf_load: add map name to load_maps error message

To help when debugging bpf/xdp load issues, have the load_map()
error message include the number and name of the map that
failed.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index e6d7e0fe155b47bd461f5d713e7a4eb4ad4e1ace..5c052b9ea63fe2db7685c03344a157aad3c031df 100644 (file)
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -284,8 +284,8 @@ static int load_maps(struct bpf_map_data *maps, int nr_maps,
                                                        numa_node);
                }
                if (map_fd[i] < 0) {
-                       printf("failed to create a map: %d %s\n",
-                              errno, strerror(errno));
+                       printf("failed to create map %d (%s): %d %s\n",
+                              i, maps[i].name, errno, strerror(errno));
                        return 1;
                }
                maps[i].fd = map_fd[i];