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From: Ming Zhang <mingz@ele.uri.edu>
To: linux-scsi <linux-scsi@vger.kernel.org>
Cc: Damian Pietras <daper@daper.net>
Subject: read only scsi disk
Date: Thu, 09 Feb 2006 12:04:07 -0500	[thread overview]
Message-ID: <1139504647.9367.57.camel@localhost.localdomain> (raw)

Hi folks

Could anybody shed a light on this?

We are adding the support for an OSS iscsi target to support export an
iscsi disk as readonly. We set correct read only bit in sense dbd. But
we found that only when we set the removable bit, the linux will
actually check the ro bit. more detail information can be found from

http://sourceforge.net/mailarchive/forum.php?thread_id=9682261&forum_id=40837

from sd.c, it looks like removable is judged first.

             if (sdp->removable)
                   sd_read_write_protect_flag(sdkp, disk->disk_name,
                                                   buffer);


so is there special reason that we should judge removable before we see
if write protect?

thanks!

Ming



             reply	other threads:[~2006-02-09 17:04 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-09 17:04 Ming Zhang [this message]
2006-02-09 19:02 ` read only scsi disk Matthew Wilcox
2006-02-09 19:19   ` Ming Zhang
2006-02-09 19:54   ` Stefan Richter
2006-02-09 20:01     ` Ming Zhang
2006-02-10 10:35   ` Christoph Hellwig
2006-02-09 19:36 ` Stefan Richter
2006-02-09 19:41   ` Ming Zhang
2006-02-09 20:57     ` Stefan Richter
2006-02-09 21:11       ` Ming Zhang
  -- strict thread matches above, loose matches on Subject: below --
2006-02-09 19:32 berthiaume_wayne
2006-02-09 19:38 ` Ming Zhang

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