2019-08-07 11:25 UTC+0900 ~ Daniel T. Lee <danieltim...@gmail.com>
> Since, new sub-command 'net attach/detach' has been added for
> attaching XDP program on interface,
> this commit documents usage and sample output of `net attach/detach`.
>
> Signed-off-by: Daniel T. Lee <danieltim...@gmail.com>
> ---
> .../bpf/bpftool/Documentation/bpftool-net.rst | 51 +++++++++++++++++--
> 1 file changed, 48 insertions(+), 3 deletions(-)
>
> diff --git a/tools/bpf/bpftool/Documentation/bpftool-net.rst
> b/tools/bpf/bpftool/Documentation/bpftool-net.rst
> index d8e5237a2085..4ad1a380e186 100644
> --- a/tools/bpf/bpftool/Documentation/bpftool-net.rst
> +++ b/tools/bpf/bpftool/Documentation/bpftool-net.rst
> @@ -15,17 +15,22 @@ SYNOPSIS
> *OPTIONS* := { [{ **-j** | **--json** }] [{ **-p** | **--pretty** }] }
>
> *COMMANDS* :=
> - { **show** | **list** } [ **dev** name ] | **help**
> + { **show** | **list** | **attach** | **detach** | **help** }
>
> NET COMMANDS
> ============
>
> -| **bpftool** **net { show | list } [ dev name ]**
> +| **bpftool** **net { show | list }** [ **dev** *name* ]
> +| **bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *name* [
> **overwrite** ]
> +| **bpftool** **net detach** *ATTACH_TYPE* **dev** *name*
Nit: Could we have "name" in capital letters (everywhere in the file),
to make this file consistent with the formatting used for
bpftool-prog.rst and bpftool-map.rst?
> | **bpftool** **net help**
> +|
> +| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
> +| *ATTACH_TYPE* := { **xdp** | **xdpgeneric** | **xdpdrv** |
> **xdpoffload** }
>
> DESCRIPTION
> ===========
> - **bpftool net { show | list } [ dev name ]**
> + **bpftool net { show | list }** [ **dev** *name* ]
> List bpf program attachments in the kernel networking
> subsystem.
>
> Currently, only device driver xdp attachments and tc filter
> @@ -47,6 +52,18 @@ DESCRIPTION
> all bpf programs attached to non clsact qdiscs, and
> finally all
> bpf programs attached to root and clsact qdisc.
>
> + **bpftool** **net attach** *ATTACH_TYPE* *PROG* **dev** *name* [
> **overwrite** ]
> + Attach bpf program *PROG* to network interface *name* with
> + type specified by *ATTACH_TYPE*. Previously attached bpf
> program
> + can be replaced by the command used with **overwrite**
> option.
> + Currently, *ATTACH_TYPE* only contains XDP programs.
Other nit: "ATTACH_TYPE only contains XDP programs" sounds odd to me.
Could we maybe phrase this something like: "Currently, only XDP-related
modes are supported for ATTACH_TYPE"?
Also, could you please provide a brief description of the different
attach types? In particular, explaining what "xdp" alone stands for
might be useful.
Thanks,
Quentin
> +
> + **bpftool** **net detach** *ATTACH_TYPE* **dev** *name*
> + Detach bpf program attached to network interface *name*
> with
> + type specified by *ATTACH_TYPE*. To detach bpf program,
> same
> + *ATTACH_TYPE* previously used for attach must be specified.
> + Currently, *ATTACH_TYPE* only contains XDP programs.
