NetBSD Problem Report #39008
From apb@cequrux.com Sat Jun 21 16:28:18 2008
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Date: Sat, 21 Jun 2008 16:23:19 +0000 (UTC)
From: apb@cequrux.com
To: gnats-bugs@gnats.NetBSD.org
Subject: not al disks support DIOCGSTRATEGY/DIOCSSTRATEGY
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>Number: 39008
>Category: kern
>Synopsis: not al disks support DIOCGSTRATEGY/DIOCSSTRATEGY
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Jun 21 16:30:00 +0000 2008
>Originator: Alan Barrett
>Release: NetBSD 4.99.63
>Organization:
Not much
>Environment:
System: NetBSD 4.99.63
Architecture: i386
Machine: i386
>Description:
Not all disk devices support the DIOCGSTRATEGY and
DIOCSSTRATEGY ioctls.
>How-To-Repeat:
# dkctl wd0 strategy
/dev/rwd0d: priocscan
# dkctl cgd1 strategy
/dev/rcgd1d: priocscan
# dkctl sd0 strategy
dkctl: /dev/rsd0d: DIOCGSTRATEGY: Inappropriate ioctl for device
>Fix:
There seem to be several almost-identical implementations
of the disk I/O strategy ioctls, in sys/dev/dksubr.c,
sys/dev/ld.c, and sys/dev/ata/wd.c. There's an implementation
in sys/dev/scsipi/cd.c that always returns EIO. There are
implementations in sys/arch/xen/xbd.c and xbd_xenbus.c that
return EOPNOTSUPP.
It apears that the wd driver uses its own implementation, the
cgd driver falls back to the implementation in dksubr.c, and the
sd driver neitehr provides its own implementaiotn nor falls back
to the shared implementation in dksub.c.
I think that it would make sense for the relevant code to be
shared by all disk drivers.
(Contact us)
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