linux-kernel - Re: [PATCH v7 09/18] pstore/blk: Introduce backend for block devices

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Message-ID: <202005111609.2CA37E4A3@keescook>
Date:   Mon, 11 May 2020 16:11:22 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     WeiXiong Liao <liaoweixiong@...winnertech.com>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Rob Herring <robh@...nel.org>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v7 09/18] pstore/blk: Introduce backend for block devices

On Mon, May 11, 2020 at 08:36:49AM -0700, Randy Dunlap wrote:
> On 5/10/20 1:24 PM, Kees Cook wrote:
> > diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
> > index 98d2457bdd9f..92ba73bd0b62 100644
> > --- a/fs/pstore/Kconfig
> > +++ b/fs/pstore/Kconfig
> > @@ -160,3 +160,67 @@ config PSTORE_ZONE
> >  	help
> >  	  The common layer for pstore/blk (and pstore/ram in the future)
> >  	  to manage storage in zones.
> > +
> > +config PSTORE_BLK
> > +	tristate "Log panic/oops to a block device"
> > +	depends on PSTORE
> > +	depends on BLOCK
> > +	select PSTORE_ZONE
> > +	default n
> > +	help
> > +	  This enables panic and oops message to be logged to a block dev
> > +	  where it can be read back at some later point.
> > +
> > +	  If unsure, say N.
> > +
> > +config PSTORE_BLK_BLKDEV
> > +	string "block device identifier"
> > +	depends on PSTORE_BLK
> > +	default ""
> > +	help
> > +	  Which block device should be used for pstore/blk.
> > +
> > +	  It accept the following variants:
> > +	  1) <hex_major><hex_minor> device number in hexadecimal represents
> > +	     itself no leading 0x, for example b302.
> 
> 	     itself with no leading 0x,

Yes, I've reworked the language here. Thanks!

-- 
Kees Cook