From: Mike Anderson <andmike@linux.vnet.ibm.com>
To: Douglas Gilbert <dgilbert@interlog.com>
Cc: Tejun Heo <tj@kernel.org>,
axboe@kernel.dk, linux-kernel@vger.kernel.org,
linux-scsi@vger.kernel.org, kay.sievers@vrfy.org, jack@suse.cz,
James.Bottomley@HansenPartnership.com
Subject: Re: [PATCHSET RFC] block/SCSI: implement in-kernel disk event handling
Date: Thu, 4 Nov 2010 11:37:57 -0700 [thread overview]
Message-ID: <20101104183757.GA3883@linux.vnet.ibm.com> (raw)
In-Reply-To: <4CD2E83A.9020309@interlog.com>
Douglas Gilbert <dgilbert@interlog.com> wrote:
<snip>
> Ideally I would like to see a way from the user space
> to uncouple a unit from the sd (or sr) driver, in a
> similar way to how an LLD can use
> scsi_device::no_uld_attach . That would restrict user
> space access to the bsg or sg driver.
I am not sure if this is exactly what you want but you can unbind a
device from the sd driver today.
E.x.
# cd /sys/bus/scsi/drivers/sd
# ls
0:0:0:0 4:0:0:0 4:0:1:0 5:0:0:0 5:0:1:0 bind unbind
# sg_map
/dev/sg0 /dev/sda
/dev/sg1 /dev/sdb
/dev/sg2 /dev/sdc
/dev/sg3 /dev/sdd
/dev/sg4 /dev/sde
# echo "5:0:1:0" > unbind
# ls
0:0:0:0 4:0:0:0 4:0:1:0 5:0:0:0 bind unbind
# sg_map
/dev/sg0 /dev/sda
/dev/sg1 /dev/sdb
/dev/sg2 /dev/sdc
/dev/sg3 /dev/sdd
/dev/sg4
-andmike
--
Michael Anderson
andmike@linux.vnet.ibm.com
prev parent reply other threads:[~2010-11-04 18:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-01 18:44 [PATCHSET RFC] block/SCSI: implement in-kernel disk event handling Tejun Heo
2010-11-01 18:44 ` [PATCH 1/7] block: kill genhd_media_change_notify() Tejun Heo
2010-11-01 18:44 ` [PATCH 2/7] block: move register_disk() and del_gendisk() to block/genhd.c Tejun Heo
2010-11-01 18:44 ` [PATCH 3/7] implement in-kernel gendisk events handling Tejun Heo
2010-11-01 18:44 ` [PATCH 4/7] cdrom: add ->check_events() support Tejun Heo
2010-11-01 18:44 ` [PATCH 5/7] scsi: replace sr_test_unit_ready() with scsi_test_unit_ready() Tejun Heo
2010-11-01 18:44 ` [PATCH 6/7] sr: implement sr_check_events() Tejun Heo
2010-11-01 18:44 ` [PATCH 7/7] sd: implement sd_check_events() Tejun Heo
2010-11-04 17:07 ` [PATCHSET RFC] block/SCSI: implement in-kernel disk event handling Douglas Gilbert
2010-11-04 18:37 ` Mike Anderson [this message]
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