On Mon, Jun 12, 2023 at 8:16 AM Yafang Shao <laoar.shao@xxxxxxxxx> wrote:
>
> Show the already expose kprobe_multi link info in bpftool. The result as
> follows,
>
> 52: kprobe_multi prog 381
> retprobe 0 func_cnt 7
> addrs ffffffff9ec44f20 funcs schedule_timeout_interruptible
> ffffffff9ec44f60 schedule_timeout_killable
> ffffffff9ec44fa0 schedule_timeout_uninterruptible
> ffffffff9ec44fe0 schedule_timeout_idle
> ffffffffc09468d0 xfs_trans_get_efd [xfs]
> ffffffffc0953a10 xfs_trans_get_buf_map [xfs]
> ffffffffc0957320 xfs_trans_get_dqtrx [xfs]
> pids kprobe_multi(559862)
> 53: kprobe_multi prog 381
> retprobe 1 func_cnt 7
> addrs ffffffff9ec44f20 funcs schedule_timeout_interruptible
> ffffffff9ec44f60 schedule_timeout_killable
> ffffffff9ec44fa0 schedule_timeout_uninterruptible
> ffffffff9ec44fe0 schedule_timeout_idle
> ffffffffc09468d0 xfs_trans_get_efd [xfs]
> ffffffffc0953a10 xfs_trans_get_buf_map [xfs]
> ffffffffc0957320 xfs_trans_get_dqtrx [xfs]
it all subjective, but this format is a bit weird where "addrs" and
"funcs" is in first row to the left. Just makes everything wider. Why
not something like
addr func
ffffffff9ec44f20 schedule_timeout_interruptible
ffffffff9ec44f60 schedule_timeout_killable
ffffffffc0953a10 xfs_trans_get_buf_map [xfs]
ffffffffc0957320 xfs_trans_get_dqtrx [xfs]
Not it's singular (addr and func) because it's column names,
basically. Can also do "addr func [module]".
> pids kprobe_multi(559862)
>
> $ tools/bpf/bpftool/bpftool link show -j
> [{"id":52,"type":"kprobe_multi","prog_id":381,"retprobe":0,"func_cnt":7,"funcs":[{"addr":18446744072078249760,"func":"schedule_timeout_interruptible","module":""},{"addr":18446744072078249824,"func":"schedule_timeout_killable","module":""},{"addr":18446744072078249888,"func":"schedule_timeout_uninterruptible","module":""},{"addr":18446744072078249952,"func":"schedule_timeout_idle","module":""},{"addr":18446744072645535952,"func":"xfs_trans_get_efd","module":"[xfs]"},{"addr":18446744072645589520,"func":"xfs_trans_get_buf_map","module":"[xfs]"},{"addr":18446744072645604128,"func":"xfs_trans_get_dqtrx","module":"[xfs]"}],"pids":[{"pid":559862,"comm":"kprobe_multi"}]},{"id":53,"type":"kprobe_multi","prog_id":381,"retprobe":1,"func_cnt":7,"funcs":[{"addr":18446744072078249760,"func":"schedule_timeout_interruptible","module":""},{"addr":18446744072078249824,"func":"schedule_timeout_killable","module":""},{"addr":18446744072078249888,"func":"schedule_timeout_uninterruptible","module":""},{"addr":18446744072078249952,"func":"schedule_timeout_idle","module":""},{"addr":18446744072645535952,"func":"xfs_trans_get_efd","module":"[xfs]"},{"addr":18446744072645589520,"func":"xfs_trans_get_buf_map","module":"[xfs]"},{"addr":18446744072645604128,"func":"xfs_trans_get_dqtrx","module":"[xfs]"}],"pids":[{"pid":559862,"comm":"kprobe_multi"}]}]
>
> Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
> ---
> tools/bpf/bpftool/link.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 108 insertions(+), 1 deletion(-)
>
[...]
