libbpf: Introduce bpf_map__resize

[linux-2.6-microblaze.git] / tools / lib / bpf / libbpf.c

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 6ef7e6e..9597d4d 100644 (file)
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1113,6 +1113,20 @@ err_free_new_name:
        return -errno;
 }
 
+int bpf_map__resize(struct bpf_map *map, __u32 max_entries)
+{
+       if (!map || !max_entries)
+               return -EINVAL;
+
+       /* If map already created, its attributes can't be changed. */
+       if (map->fd >= 0)
+               return -EBUSY;
+
+       map->def.max_entries = max_entries;
+
+       return 0;
+}
+
 static int
 bpf_object__probe_name(struct bpf_object *obj)
 {