tools/bpf: support __int128 in bpftool map pretty dumper
authorYonghong Song <yhs@fb.com>
Wed, 16 Jan 2019 01:07:52 +0000 (17:07 -0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Wed, 16 Jan 2019 21:53:44 +0000 (22:53 +0100)
commite86e513854615b4222fcd5364e91b7bf707dac9a
treef6ff1ab57a61c0dfe884634943c0bd16fd93e922
parent4df3a1d0a5bffd77a9c7b00ac687f4493e57a3ce
tools/bpf: support __int128 in bpftool map pretty dumper

For formatted output, currently when json is enabled, the decimal
number is required. Similar to kernel bpffs printout,
for int128 numbers, only hex numbers are dumped, which are
quoted as strings.

The below is an example to show plain and json pretty print
based on the map in test_btf pretty print test.

  $ bpftool m s
  75: hash  name pprint_test_has  flags 0x0
        key 4B  value 112B  max_entries 4  memlock 4096B
  $ bpftool m d id 75
  ......
    {
        "key": 3,
        "value": {
            "ui32": 3,
            "ui16": 0,
            "si32": -3,
            "unused_bits2a": 0x3,
            "bits28": 0x3,
            "unused_bits2b": 0x3,
            "": {
                "ui64": 3,
                "ui8a": [3,0,0,0,0,0,0,0
                ]
            },
            "aenum": 3,
            "ui32b": 4,
            "bits2c": 0x1,
            "si128a": 0x3,
            "si128b": 0xfffffffd,
            "bits3": 0x3,
            "bits80": 0x10000000000000003,
            "ui128": 0x20000000000000003
        }
    },
  ......

  $ bptfool -p -j m d id 75
  ......
  {
        "key": ["0x03","0x00","0x00","0x00"
        ],
        "value": ["0x03","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0xfd","0xff","0xff","0xff","0x0f","0x00","0x00","0xc0",
                  "0x03","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x03","0x00","0x00","0x00","0x04","0x00","0x00","0x00",
                  "0x01","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x03","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0xfd","0xff","0xff","0xff","0x00","0x00","0x00","0x00",
                  "0x00","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x1b","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x08","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x03","0x00","0x00","0x00","0x00","0x00","0x00","0x00",
                  "0x02","0x00","0x00","0x00","0x00","0x00","0x00","0x00"
        ],
        "formatted": {
            "key": 3,
            "value": {
                "ui32": 3,
                "ui16": 0,
                "si32": -3,
                "unused_bits2a": "0x3",
                "bits28": "0x3",
                "unused_bits2b": "0x3",
                "": {
                    "ui64": 3,
                    "ui8a": [3,0,0,0,0,0,0,0
                    ]
                },
                "aenum": 3,
                "ui32b": 4,
                "bits2c": "0x1",
                "si128a": "0x3",
                "si128b": "0xfffffffd",
                "bits3": "0x3",
                "bits80": "0x10000000000000003",
                "ui128": "0x20000000000000003"
            }
        }
    }
  ......

Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
tools/bpf/bpftool/btf_dumper.c