iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf: bloom_filter memory usage

Browse Source 
Introduce a new helper to calculate the bloom_filter memory usage.

The result as follows,
- before
16: bloom_filter  flags 0x0
        key 0B  value 8B  max_entries 65536  memlock 524288B

- after
16: bloom_filter  flags 0x0
        key 0B  value 8B  max_entries 65536  memlock 65856B

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230305124615.12358-9-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yafang Shao 2023-03-05 12:46:05 +00:00 committed by Alexei Starovoitov
parent 2f7e4ab2ca
commit 71a49abe73
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
kernel/bpf/bloom_filter.c
View File

@ -193,6 +193,17 @@ static int bloom_map_check_btf(const struct bpf_map *map,
return btf_type_is_void(key_type) ? 0 : -EINVAL;
}
static u64 bloom_map_mem_usage(const struct bpf_map *map)
{
struct bpf_bloom_filter *bloom;
u64 bitset_bytes;
bloom = container_of(map, struct bpf_bloom_filter, map);
bitset_bytes = BITS_TO_BYTES((u64)bloom->bitset_mask + 1);
bitset_bytes = roundup(bitset_bytes, sizeof(unsigned long));
return sizeof(*bloom) + bitset_bytes;
}
BTF_ID_LIST_SINGLE(bpf_bloom_map_btf_ids, struct, bpf_bloom_filter)
const struct bpf_map_ops bloom_filter_map_ops = {
.map_meta_equal = bpf_map_meta_equal,
@ -206,5 +217,6 @@ const struct bpf_map_ops bloom_filter_map_ops = {
.map_update_elem = bloom_map_update_elem,
.map_delete_elem = bloom_map_delete_elem,
.map_check_btf = bloom_map_check_btf,
.map_mem_usage = bloom_map_mem_usage,
.map_btf_id = &bpf_bloom_map_btf_ids[0],
};