linux-kernel - Re: [PATCH v3 2/6] pstore/platform: Pass max

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Date:   Wed, 06 May 2020 14:25:41 -0700
From:   Joe Perches <joe@...ches.com>
To:     Kees Cook <keescook@...omium.org>,
        Pavel Tatashin <pasha.tatashin@...een.com>
Cc:     Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Rob Herring <robh+dt@...nel.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>, jmorris@...ei.org,
        sashal@...nel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/6] pstore/platform: Pass max_reason to kmesg dump

On Wed, 2020-05-06 at 14:15 -0700, Kees Cook wrote:
> From: Pavel Tatashin <pasha.tatashin@...een.com>
> 
> Add a new member to struct pstore_info for passing information about
> kmesg dump maximum reason. This allows a finer control of what kmesg
> dumps are sent to pstore storage backends.

trivia:

> diff --git a/include/linux/pstore.h b/include/linux/pstore.h
[]
> @@ -96,6 +96,12 @@ struct pstore_record {
>   *
>   * @read_mutex:	serializes @open, @read, @close, and @erase callbacks
>   * @flags:	bitfield of frontends the backend can accept writes for
> + * @max_reason:	Used when PSTORE_FLAGS_DMESG is set. Contains the
> + *		kmsg_dump_reason enum value. KMSG_DUMP_UNDEF means
> + *		"use existing kmsg_dump() filtering, based on the
> + *		printk.always_kmsg_dump boot param" (which is either
> + *		KMSG_DUMP_OOPS when false, or KMSG_DUMP_MAX when
> + *		tree); see printk.always_kmsg_dump for more details.

s/tree/true/