netdev - [v3,0/4] tools: bpftool: add net attach/detach command to attach XDP prog

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Date:   Wed,  7 Aug 2019 11:25:05 +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: [v3,0/4] tools: bpftool: add net attach/detach command to attach XDP prog

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

    # bpftool prog
	16: xdp  name xdp_prog1  tag 539ec6ce11b52f98  gpl
        loaded_at 2019-08-07T08:30:17+0900  uid 0
    ...
	20: xdp  name xdp_fwd_prog  tag b9cb69f121e4a274  gpl
        loaded_at 2019-08-07T08:30:17+0900  uid 0

	# bpftool net attach xdpdrv id 16 dev enp6s0np0
    # bpftool net
    xdp:
	enp6s0np0(4) driver id 16

	# bpftool net attach xdpdrv id 20 dev enp6s0np0 overwrite
    # bpftool net
    xdp:
	enp6s0np0(4) driver id 20

	# bpftool net detach xdpdrv dev enp6s0np0
    # bpftool net
    xdp:

While this patch only contains support for XDP, through `net
attach/detach`, bpftool can further support other prog attach types.

XDP attach/detach tested on Mellanox ConnectX-4 and Netronome Agilio.

---
Changes in v3:
  - added 'overwrite' option for replacing previously attached XDP prog
  - command argument order has been changed ('ATTACH_TYPE' comes first)
  - add 'dev' keyword in front of <devname>
  - added bash-completion and documentation

Changes in v2:
  - command 'load/unload' changed to 'attach/detach' for the consistency

Daniel T. Lee (4):
  tools: bpftool: add net attach command to attach XDP on interface
  tools: bpftool: add net detach command to detach XDP on interface
  tools: bpftool: add bash-completion for net attach/detach
  tools: bpftool: add documentation for net attach/detach

 .../bpf/bpftool/Documentation/bpftool-net.rst |  51 ++++-
 tools/bpf/bpftool/bash-completion/bpftool     |  64 ++++++-
 tools/bpf/bpftool/net.c                       | 181 ++++++++++++++++--
 3 files changed, 273 insertions(+), 23 deletions(-)

-- 
2.20.1