diff options
| author | Chris J Arges <carges@cloudflare.com> | 2022-03-10 00:41:58 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-03-11 02:06:11 +0300 |
| commit | 357b3cc3c0467b2f7cd6c4a87f7a18bfd779ce5b (patch) | |
| tree | a2220e3df19d2cfcb614a891ad66203eecacd51c /tools/bpf/bpftool/map.c | |
| parent | 1b773d0003aa90e60953d263c2ee31e6fb4a8a69 (diff) | |
| download | linux-357b3cc3c0467b2f7cd6c4a87f7a18bfd779ce5b.tar.xz | |
bpftool: Ensure bytes_memlock json output is correct
If a BPF map is created over 2^32 the memlock value as displayed in JSON
format will be incorrect. Use atoll instead of atoi so that the correct
number is displayed.
```
$ bpftool map create /sys/fs/bpf/test_bpfmap type hash key 4 \
value 1024 entries 4194304 name test_bpfmap
$ bpftool map list
1: hash name test_bpfmap flags 0x0
key 4B value 1024B max_entries 4194304 memlock 4328521728B
$ sudo bpftool map list -j | jq .[].bytes_memlock
33554432
```
Signed-off-by: Chris J Arges <carges@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/b6601087-0b11-33cc-904a-1133d1500a10@cloudflare.com
Diffstat (limited to 'tools/bpf/bpftool/map.c')
| -rw-r--r-- | tools/bpf/bpftool/map.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index e746642de292..f91d9bf9054e 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -504,7 +504,7 @@ static int show_map_close_json(int fd, struct bpf_map_info *info) jsonw_uint_field(json_wtr, "max_entries", info->max_entries); if (memlock) - jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock)); + jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock)); free(memlock); if (info->type == BPF_MAP_TYPE_PROG_ARRAY) { |