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From: Brian Norris <briannorris@chromium.org>
To: Arend van Spriel <aspriel@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Johannes Berg <johannes.berg@intel.com>,
	Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH for-4.16 1/3] sysfs: improve devices-coredump description with user-space perspective
Date: Thu, 15 Mar 2018 10:05:00 -0700	[thread overview]
Message-ID: <20180315170459.GA120116@rodete-desktop-imager.corp.google.com> (raw)
In-Reply-To: <1521107725-25027-2-git-send-email-aspriel@gmail.com>

On Thu, Mar 15, 2018 at 10:55:23AM +0100, Arend van Spriel wrote:
> Instead of referring to kernel internals, describe the ABI from user-space
> perspective to clarify what can be expected when using it.
> 
> Signed-off-by: Arend van Spriel <aspriel@gmail.com>
> ---
>  Documentation/ABI/testing/sysfs-devices-coredump | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-devices-coredump b/Documentation/ABI/testing/sysfs-devices-coredump
> index e459368..d5a4c75 100644
> --- a/Documentation/ABI/testing/sysfs-devices-coredump
> +++ b/Documentation/ABI/testing/sysfs-devices-coredump
> @@ -2,9 +2,13 @@ What:		/sys/devices/.../coredump
>  Date:		December 2017
>  Contact:	Arend van Spriel <aspriel@gmail.com>
>  Description:
> -		The /sys/devices/.../coredump attribute is only present when the
> -		device is bound to a driver, which provides the .coredump()
> -		callback. The attribute is write only. Anything written to this
> -		file will trigger the .coredump() callback.
> +		When present the /sys/devices/.../coredump attribute can be used
> +		to trigger a coredump of the device. The coredump contents are
> +		device driver specific and thus vary. The coredump attribute is
> +		writeonly. Anything written to this file will trigger creation
> +		of the coredump. When the coredump is made available under
> +		/sys/class/devcoredump it will generate a uevent. When the
> +		coredump can not be successfully generated no ueven will occur.

s/ueven/uevent/

> 
> -		Available when CONFIG_DEV_COREDUMP is enabled.
> +		Available when CONFIG_DEV_COREDUMP is enabled and the device
> +		driver supports coredump generation.

What about /sys/class/devcoredump/disabled? Maybe we just need a
sysfs-class-devcoredump too, now that there's a formal method for
triggering devcoredumps.

Brian

> --
> 1.9.1
> 

  reply	other threads:[~2018-03-15 17:05 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-15  9:55 [PATCH for-4.16 0/3] drivers: base: revise coredump ABI Arend van Spriel
2018-03-15  9:55 ` [PATCH for-4.16 1/3] sysfs: improve devices-coredump description with user-space perspective Arend van Spriel
2018-03-15 17:05   ` Brian Norris [this message]
2018-03-15 20:20     ` Arend van Spriel
2018-03-15  9:55 ` [PATCH for-4.16 2/3] drivers: change struct device_driver::coredump() return type to void Arend van Spriel
2018-03-23 16:55   ` Greg Kroah-Hartman
2018-03-24  8:50     ` Arend van Spriel
2018-03-24  9:04       ` Greg Kroah-Hartman
2018-03-24 14:10         ` Arend van Spriel
2018-04-06 10:13         ` Arend van Spriel
2018-04-06 14:46           ` Greg Kroah-Hartman
2018-04-06 19:35             ` Arend van Spriel
2018-04-07  7:49               ` Greg Kroah-Hartman
2018-03-15  9:55 ` [PATCH for-4.16 3/3] drivers: base: remove check for callback in coredump_store() Arend van Spriel
2018-03-23 16:56 ` [PATCH for-4.16 0/3] drivers: base: revise coredump ABI Greg Kroah-Hartman

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