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bpf: reuseport_array memory usage

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A new helper is introduced to calculate reuseport_array memory usage.

The result as follows,
- before
14: reuseport_sockarray  name count_map  flags 0x0
        key 4B  value 8B  max_entries 65536  memlock 1048576B

- after
14: reuseport_sockarray  name count_map  flags 0x0
        key 4B  value 8B  max_entries 65536  memlock 524544B

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230305124615.12358-7-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yafang Shao 2023-03-05 12:46:03 +00:00 committed by Alexei Starovoitov
parent cbb9b6068c
commit 2e89caf055
1 changed files with 8 additions and 0 deletions
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8
kernel/bpf/reuseport_array.c
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@ -335,6 +335,13 @@ static int reuseport_array_get_next_key(struct bpf_map *map, void *key,
return 0;
}
static u64 reuseport_array_mem_usage(const struct bpf_map *map)
{
struct reuseport_array *array;
return struct_size(array, ptrs, map->max_entries);
}
BTF_ID_LIST_SINGLE(reuseport_array_map_btf_ids, struct, reuseport_array)
const struct bpf_map_ops reuseport_array_ops = {
.map_meta_equal = bpf_map_meta_equal,
@ -344,5 +351,6 @@ const struct bpf_map_ops reuseport_array_ops = {
.map_lookup_elem = reuseport_array_lookup_elem,
.map_get_next_key = reuseport_array_get_next_key,
.map_delete_elem = reuseport_array_delete_elem,
.map_mem_usage = reuseport_array_mem_usage,
.map_btf_id = &reuseport_array_map_btf_ids[0],
};