Re: [PATCH bpf-next v4 2/7] bpf: Refactor inode/task/sk storage map_{alloc,free}() for reuse

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On 10/24/22 1:34 PM, Martin KaFai Lau wrote:
On 10/23/22 11:05 AM, Yonghong Song wrote
-void bpf_local_storage_map_free(struct bpf_local_storage_map *smap,
-                int __percpu *busy_counter)
+static void __bpf_local_storage_map_free(struct bpf_local_storage_map *smap,
+                     int __percpu *busy_counter)

nit.

This map_free does not look like it requires a separate "__" version since it is not reused.  probably just put everything into the bpf_local_storage_map_free() instead?

Okay, will inline __bpf_local_storage_map_free() into
bpf_local_storage_map_free().


  {
      struct bpf_local_storage_elem *selem;
      struct bpf_local_storage_map_bucket *b;
@@ -613,7 +613,7 @@ int bpf_local_storage_map_alloc_check(union bpf_attr *attr)
      return 0;
  }
-struct bpf_local_storage_map *bpf_local_storage_map_alloc(union bpf_attr *attr) +static struct bpf_local_storage_map *__bpf_local_storage_map_alloc(union bpf_attr *attr)
  {
      struct bpf_local_storage_map *smap;
      unsigned int i;
@@ -663,3 +663,28 @@ int bpf_local_storage_map_check_btf(const struct bpf_map *map,
      return 0;
  }

[ ... ]

+void bpf_local_storage_map_free(struct bpf_map *map,
+                struct bpf_local_storage_cache *cache,
+                int __percpu *busy_counter)
+{
+    struct bpf_local_storage_map *smap;
+
+    smap = (struct bpf_local_storage_map *)map;
+    bpf_local_storage_cache_idx_free(cache, smap->cache_idx);
+    __bpf_local_storage_map_free(smap, busy_counter);
+}




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