netdev - [PATCH 0/2] tools: bpftool: add net (un)load command to load XDP

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Message-Id: <20190730184821.10833-1-danieltimlee@gmail.com>
Date:   Wed, 31 Jul 2019 03:48:19 +0900
From:   "Daniel T. Lee" <danieltimlee@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>
Cc:     netdev@...r.kernel.org
Subject: [PATCH 0/2] tools: bpftool: add net (un)load command to load XDP

Currently, bpftool net only supports dumping progs loaded on the
interface. To load XDP prog on interface, user must use other tool
(eg. iproute2). By this patch, with `bpftool net (un)load`, user can
(un)load XDP prog on interface.

    $ ./bpftool prog
    ...
    208: xdp  name xdp_prog1  tag ad822e38b629553f  gpl
      loaded_at 2019-07-28T18:03:11+0900  uid 0
    ...
    $ ./bpftool net load id 208 xdpdrv enp6s0np1
    $ ./bpftool net
    xdp:
    enp6s0np1(5) driver id 208
    ...
    $ ./bpftool net unload xdpdrv enp6s0np1
    $ ./bpftool net
    xdp:
    ...

The word 'load' is used instead of 'attach', since XDP program is not
considered as 'bpf_attach_type' and can't be attached with
'BPF_PROG_ATTACH'. In this context, the meaning of 'load' is, prog will
be loaded on interface.

While this patch only contains support for XDP, through `net (un)load`,
bpftool can further support other prog attach types.

XDP (un)load tested on Netronome Agilio.

Daniel T. Lee (2):
  tools: bpftool: add net load command to load XDP on interface
  tools: bpftool: add net unload command to unload XDP on interface

 tools/bpf/bpftool/net.c | 160 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 159 insertions(+), 1 deletion(-)

-- 
2.20.1