linux-kernel - Re: [PATCH 1/2] fault-inject: allow configuration via configfs

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Date:   Sat, 15 Apr 2023 16:53:41 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Akinobu Mita <akinobu.mita@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        akpm@...ux-foundation.org, axboe@...nel.dk,
        Linux-Next <linux-next@...r.kernel.org>
Subject: Re: [PATCH 1/2] fault-inject: allow configuration via configfs

Hi Mita-san,

On Mon, Mar 27, 2023 at 4:48 PM Akinobu Mita <akinobu.mita@...il.com> wrote:
> This provides a helper function to allow configuration of fault-injection
> for configfs-based drivers.
>
> The config items created by this function have the same interface as the
> one created under debugfs by fault_create_debugfs_attr().
>
> Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

Thanks for your patch, which is now commit 4668c7a2940d134b
("fault-inject: allow configuration via configfs") in linux-next
(to be tagged soon as next-20140414).

> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1977,9 +1977,20 @@ config FAIL_SUNRPC
>           Provide fault-injection capability for SunRPC and
>           its consumers.
>
> +config FAULT_INJECTION_CONFIGFS
> +       bool "Configfs interface for fault-injection capabilities"
> +       depends on FAULT_INJECTION && CONFIGFS_FS

noreply@...erman.id.au reported build failures for e.g. m68k-allmodconfig
http://kisskb.ellerman.id.au/kisskb/buildresult/14911188/:

fault-inject.c:(.text+0x1ee): undefined reference to
`config_group_init_type_name'

This fails because FAULT_INJECTION=y but CONFIGFS_FS=m.

> +       help
> +         This option allows configfs-based drivers to dynamically configure
> +         fault-injection via configfs.  Each parameter for driver-specific
> +         fault-injection can be made visible as a configfs attribute in a
> +         configfs group.
> +
> +

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds