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charset="utf-8" It is useful to print map ID on successful creation. JSON case: $ ./bpftool -j map create /sys/fs/bpf/test_map4 type hash key 4 value 8 ent= ries 128 name map4 {"id":12} Generic case: $ ./bpftool map create /sys/fs/bpf/test_map5 type hash key 4 value 8 entri= es 128 name map5 Map successfully created with ID: 15 Bpftool Issue: https://github.com/libbpf/bpftool/issues/121 Signed-off-by: Harshit Mogalapalli Acked-by: Yonghong Song Reviewed-by: Quentin Monnet --- tools/bpf/bpftool/map.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/tools/bpf/bpftool/map.c b/tools/bpf/bpftool/map.c index c9de44a45778..80c96b33b553 100644 --- a/tools/bpf/bpftool/map.c +++ b/tools/bpf/bpftool/map.c @@ -1251,6 +1251,8 @@ static int do_create(int argc, char **argv) LIBBPF_OPTS(bpf_map_create_opts, attr); enum bpf_map_type map_type =3D BPF_MAP_TYPE_UNSPEC; __u32 key_size =3D 0, value_size =3D 0, max_entries =3D 0; + struct bpf_map_info map_info =3D {}; + __u32 map_info_len =3D sizeof(map_info); const char *map_name =3D NULL; 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charset="utf-8" Add selftest to check if Map ID is printed on successful creation in both plain text and json formats. Signed-off-by: Harshit Mogalapalli --- .../testing/selftests/bpf/test_bpftool_map.sh | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/tools/testing/selftests/bpf/test_bpftool_map.sh b/tools/testin= g/selftests/bpf/test_bpftool_map.sh index 515b1df0501e..013a64e96cbf 100755 --- a/tools/testing/selftests/bpf/test_bpftool_map.sh +++ b/tools/testing/selftests/bpf/test_bpftool_map.sh @@ -361,6 +361,40 @@ test_map_access_with_btf_list() { fi } =20 +# Function to test map ID printing +# Parameters: +# $1: bpftool path +# $2: BPF_DIR +test_map_id_printing() { + local bpftool_path=3D"$1" + local bpf_dir=3D"$2" + local test_map_name=3D"test_map_id" + local test_map_path=3D"$bpf_dir/$test_map_name" + + local output + output=3D$("$bpftool_path" map create "$test_map_path" type hash key 4 \ + value 8 entries 128 name "$test_map_name") + if echo "$output" | grep -q "Map successfully created with ID:"; then + echo "PASS: Map ID printed in plain text output." + else + echo "FAIL: Map ID not printed in plain text output." + exit 1 + fi + + rm -f "$test_map_path" + + output=3D$("$bpftool_path" map create "$test_map_path" type hash key 4 \ + value 8 entries 128 name "$test_map_name" --json) + if echo "$output" | jq -e 'has("id")' >/dev/null 2>&1; then + echo "PASS: Map ID printed in JSON output." + else + echo "FAIL: Map ID not printed in JSON output." + exit 1 + fi + + rm -f "$test_map_path" +} + set -eu =20 trap cleanup_skip EXIT @@ -395,4 +429,6 @@ test_map_creation_and_map_of_maps "$BPFTOOL_PATH" "$BPF= _DIR" =20 test_map_access_with_btf_list "$BPFTOOL_PATH" =20 +test_map_id_printing "$BPFTOOL_PATH" "$BPF_DIR" + exit 0 --=20 2.50.1