On Wed, 27 Sep 2017 00:02:08 +0100
Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx> wrote:
> On Tue, 26 Sep 2017 15:24:06 -0700, Alexei Starovoitov wrote:
> > On Tue, Sep 26, 2017 at 08:35:22AM -0700, Jakub Kicinski wrote:
> > > Add a simple tool for querying and updating BPF objects on the system.
> > >
> > > Signed-off-by: Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>
> > > Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxxx>
[...]
> > > tools/bpf/Makefile | 18 +-
> > > tools/bpf/bpftool/Makefile | 80 +++++
> > > tools/bpf/bpftool/common.c | 214 ++++++++++++
> > > tools/bpf/bpftool/jit_disasm.c | 83 +++++
> > > tools/bpf/bpftool/main.c | 212 ++++++++++++
> > > tools/bpf/bpftool/main.h | 99 ++++++
> > > tools/bpf/bpftool/map.c | 742 +++++++++++++++++++++++++++++++++++++++++
> > > tools/bpf/bpftool/prog.c | 392 ++++++++++++++++++++++
> > > 8 files changed, 1837 insertions(+), 3 deletions(-)
> > ...
> > > +static int do_help(int argc, char **argv)
> > > +{
> > > + fprintf(stderr,
> > > + "Usage: %s %s show [MAP]\n"
> > > + " %s %s dump MAP\n"
> > > + " %s %s update MAP key BYTES value VALUE [UPDATE_FLAGS]\n"
> > > + " %s %s lookup MAP key BYTES\n"
> > > + " %s %s getnext MAP [key BYTES]\n"
> > > + " %s %s delete MAP key BYTES\n"
> > > + " %s %s pin MAP FILE\n"
> > > + " %s %s help\n"
> > > + "\n"
> > > + " MAP := { id MAP_ID | pinned FILE }\n"
> > > + " " HELP_SPEC_PROGRAM "\n"
> > > + " VALUE := { BYTES | MAP | PROG }\n"
> > > + " UPDATE_FLAGS := { any | exist | noexist }\n"
> > > + "",
> >
> > overall looks good to me, but still difficult to grasp how to use it.
> > Can you add README with example usage and expected output?
>
> I have a README on GitHub, but I was thinking about perhaps writing a
> proper man page? Do you prefer one over the other?
I would prefer adding a README.rst file, in RST-format, as the rest of
the kernel documentation is moving in that direction[1] (your github
version is in README.md format). A man page will always be
out-of-sync, and even out-of-sync on different distros.
See[1]: https://www.kernel.org/doc/html/latest/
And then I would find some place in Documentation/admin-guide/ and
include the README.rst file, so it shows up at [1].
RST have an include method like:
.. include:: ../../tools/bpf/bpftool/README.rst
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
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