netdev - Re: [PATCH bpf-next v2 06/28] samples/bpf: add new hid

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Date:   Fri, 4 Mar 2022 19:26:23 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Dave Marchevsky <davemarchevsky@...com>,
        Joe Stringer <joe@...ium.io>,
        Tero Kristo <tero.kristo@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 06/28] samples/bpf: add new hid_mouse example

On Fri, Mar 04, 2022 at 06:28:30PM +0100, Benjamin Tissoires wrote:
> Everything should be available in the selftest part of the tree, but
> providing an example without uhid and hidraw will be more easy to
> follow for users.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> 
> ---
> 
> changes in v2:
> - split the series by bpf/libbpf/hid/selftests and samples
> ---
>  samples/bpf/.gitignore       |   1 +
>  samples/bpf/Makefile         |   4 ++
>  samples/bpf/hid_mouse_kern.c |  66 ++++++++++++++++++
>  samples/bpf/hid_mouse_user.c | 129 +++++++++++++++++++++++++++++++++++
>  4 files changed, 200 insertions(+)
>  create mode 100644 samples/bpf/hid_mouse_kern.c
>  create mode 100644 samples/bpf/hid_mouse_user.c
> 
> diff --git a/samples/bpf/.gitignore b/samples/bpf/.gitignore
> index 0e7bfdbff80a..65440bd618b2 100644
> --- a/samples/bpf/.gitignore
> +++ b/samples/bpf/.gitignore
> @@ -2,6 +2,7 @@
>  cpustat
>  fds_example
>  hbm
> +hid_mouse
>  ibumad
>  lathist
>  lwt_len_hist
> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> index 38638845db9d..84ef458487df 100644
> --- a/samples/bpf/Makefile
> +++ b/samples/bpf/Makefile
> @@ -60,6 +60,8 @@ tprogs-y += xdp_redirect_map
>  tprogs-y += xdp_redirect
>  tprogs-y += xdp_monitor
>  
> +tprogs-y += hid_mouse
> +
>  # Libbpf dependencies
>  LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
>  LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
> @@ -124,6 +126,7 @@ xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE)
>  xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE)
>  xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE)
>  xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE)
> +hid_mouse-objs := hid_mouse_user.o
>  
>  # Tell kbuild to always build the programs
>  always-y := $(tprogs-y)
> @@ -181,6 +184,7 @@ always-y += ibumad_kern.o
>  always-y += hbm_out_kern.o
>  always-y += hbm_edt_kern.o
>  always-y += xdpsock_kern.o
> +always-y += hid_mouse_kern.o
>  
>  ifeq ($(ARCH), arm)
>  # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
> diff --git a/samples/bpf/hid_mouse_kern.c b/samples/bpf/hid_mouse_kern.c
> new file mode 100644
> index 000000000000..c24a12e06b40
> --- /dev/null
> +++ b/samples/bpf/hid_mouse_kern.c
> @@ -0,0 +1,66 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/* Copyright (c) 2021 Benjamin Tissoires

It's 2022 now :(

Other than that, looks nice and simple, good work!

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>