BPF objects are not re-loadable after unload. User are expected to use bpf_object__close() to unload and free up resources in one operation. No need to expose bpf_object__unload() as a public API, deprecate it.[0] Add bpf_object_unload() as an alias to bpf_object__unload() and replace all bpf_object__unload() to avoid compilation errors. [0] Closes: https://github.com/libbpf/libbpf/issues/290 Signed-off-by: Hengqi Chen <hengqi.chen@xxxxxxxxx> --- tools/lib/bpf/libbpf.c | 7 +++++-- tools/lib/bpf/libbpf.h | 1 + 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index e23f1b6b9402..7de3dcbd61f2 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -6679,6 +6679,9 @@ int bpf_object__unload(struct bpf_object *obj) return 0; } +__attribute__((alias("bpf_object__unload"))) +static int bpf_object_unload(struct bpf_object *obj); + static int bpf_object__sanitize_maps(struct bpf_object *obj) { struct bpf_map *m; @@ -7055,7 +7058,7 @@ int bpf_object__load_xattr(struct bpf_object_load_attr *attr) if (obj->maps[i].pinned && !obj->maps[i].reused) bpf_map__unpin(&obj->maps[i], NULL); - bpf_object__unload(obj); + bpf_object_unload(obj); pr_warn("failed to load object '%s'\n", obj->path); return libbpf_err(err); } @@ -7664,7 +7667,7 @@ void bpf_object__close(struct bpf_object *obj) bpf_gen__free(obj->gen_loader); bpf_object__elf_finish(obj); - bpf_object__unload(obj); + bpf_object_unload(obj); btf__free(obj->btf); btf_ext__free(obj->btf_ext); diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index e35490c54eb3..ada0388ca1f2 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -150,6 +150,7 @@ struct bpf_object_load_attr { /* Load/unload object into/from kernel */ LIBBPF_API int bpf_object__load(struct bpf_object *obj); LIBBPF_API int bpf_object__load_xattr(struct bpf_object_load_attr *attr); +LIBBPF_DEPRECATED_SINCE(0, 7, "bpf_object__unload() is deprecated, use bpf_object__close() instead") LIBBPF_API int bpf_object__unload(struct bpf_object *obj); LIBBPF_API const char *bpf_object__name(const struct bpf_object *obj); -- 2.25.1
