Re: [PATCH 3/6] block: Create scsi_sense.h for SCSI and ATAPI

From: Kees Cook <keescook@chromium.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	James Bottomley <James.Bottomley@hansenpartnership.com>,
	Tejun Heo <tj@kernel.org>, Borislav Petkov <bp@alien8.de>,
	"David S. Miller" <davem@davemloft.net>,
	"Manoj N. Kumar" <manoj@linux.vnet.ibm.com>,
	"Matthew R. Ochs" <mrochs@linux.vnet.ibm.com>,
	Uma Krishnan <ukrishn@linux.vnet.ibm.com>,
	linux-block <linux-block@vger.kernel.org>,
	linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/6] block: Create scsi_sense.h for SCSI and ATAPI
Date: Tue, 22 May 2018 16:31:57 -0700	[thread overview]
Message-ID: <CAGXu5j+mgGZkTDS6EDRspJKKbU=vMT4ehv9T-SekPba=ESoGDg@mail.gmail.com> (raw)
In-Reply-To: <8d4af5c4-96fa-54ee-d5c1-b887b1de5a3c@kernel.dk>

On Tue, May 22, 2018 at 12:16 PM, Jens Axboe <axboe@kernel.dk> wrote:
> On 5/22/18 1:13 PM, Christoph Hellwig wrote:
>> On Tue, May 22, 2018 at 01:09:41PM -0600, Jens Axboe wrote:
>>> I think Martin and Christoph are objecting to moving the code to
>>> block/scsi_ioctl.h. I don't care too much about where the code is, but
>>> think it would be nice to have the definitions in a separate header. But
>>> if they prefer just pulling in all of SCSI for it, well then I guess
>>> it's pointless to move the header bits. Seems very heavy handed to me,
>>> though.
>>
>> It might be heavy handed for the 3 remaining users of drivers/ide,
>
> Brutal :-)

Heh. I noticed a similar sense buffer use in drivers/cdrom/cdrom.c
too. Is this okay under the same considerations?

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index ad9b687a236a..220ff321c102 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -79,7 +79,7 @@ config GDROM
        tristate "SEGA Dreamcast GD-ROM drive"
        depends on SH_DREAMCAST
        select CDROM
-       select BLK_SCSI_REQUEST # only for the generic cdrom code
+       select SCSI
        help
          A standard SEGA Dreamcast comes with a modified CD ROM drive called a
          "GD-ROM" by SEGA to signify it is capable of reading special disks
@@ -345,7 +345,7 @@ config CDROM_PKTCDVD
        tristate "Packet writing on CD/DVD media (DEPRECATED)"
        depends on !UML
        select CDROM
-       select BLK_SCSI_REQUEST
+       select SCSI
        help
          Note: This driver is deprecated and will be removed from the
          kernel in the near future!
diff --git a/drivers/block/paride/Kconfig b/drivers/block/paride/Kconfig
index f8bd6ef3605a..7fdfcc5eaca5 100644
--- a/drivers/block/paride/Kconfig
+++ b/drivers/block/paride/Kconfig
@@ -27,7 +27,7 @@ config PARIDE_PCD
        tristate "Parallel port ATAPI CD-ROMs"
        depends on PARIDE
        select CDROM
-       select BLK_SCSI_REQUEST # only for the generic cdrom code
+       select SCSI
        ---help---
          This option enables the high-level driver for ATAPI CD-ROM devices
          connected through a parallel port. If you chose to build PARIDE

>> but as long as that stuff just keeps working I'd rather worry about
>> everyone else, and keep the scsi code where it belongs.
>
> Fine with me then, hopefully we can some day kill it off.

I'll send a v2. I found a few other things to fix up (including the
cdrom.c one).

Thanks!

-Kees

-- 
Kees Cook
Pixel Security
