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Re: [Iscsitarget-devel] mips kernel 2.6.16rc1 + IET 0.4.13 - /dev/ietctl

To: Frederic Temporelli <frederic.temporelli@tele2.fr>
Subject: Re: [Iscsitarget-devel] mips kernel 2.6.16rc1 + IET 0.4.13 - /dev/ietctl - ioctl unknown command
From: Ming Zhang <mingz@ele.uri.edu>
Date: Wed, 08 Mar 2006 14:52:14 -0500
Cc: iet-dev <iscsitarget-devel@lists.sourceforge.net>, linux-mips <linux-mips@linux-mips.org>, skiranp@cisco.com
In-reply-to: <440F337E.3080506@tele2.fr>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <440F1EB2.8050605@tele2.fr> <1141842284.11406.69.camel@localhost.localdomain> <440F337E.3080506@tele2.fr>
Reply-to: mingz@ele.uri.edu
Sender: linux-mips-bounce@linux-mips.org
just tested, iet works on 

Linux dopteron.localdomain 2.6.16-rc5 #1 SMP PREEMPT Wed Mar 8 14:11:41
EST 2006 i686 athlon i386 GNU/Linux

so i would think this is a mips specific issue.

ming


On Wed, 2006-03-08 at 20:41 +0100, Frederic Temporelli wrote:
> Hi,
> 
> 
> Here's the bypass (really ugly, just skip the following cmd test and 
> directly go to the vfs_ioctl call later in the func).
> And yes, I'm using a 64bits kernel and app is 32 bits...
> 
> = 8< ==========================
> --- compat.c.git        2006-03-08 20:31:27.000000000 +0100
> +++ compat.c    2006-03-08 20:30:10.000000000 +0100
> @@ -400,6 +400,7 @@ asmlinkage long compat_sys_ioctl(unsigne
>         } else {
>                 static int count;
> 
> +               goto do_ioctl;
>                 if (++count <= 50)
>                         compat_ioctl_error(filp, fd, cmd, arg);
>                 error = -EINVAL;
> = 8< ==========================
> 
> Regards
> --
> Fred
> 
> 
> Ming Zhang a écrit :
> 
> >thanks for the catch.
> >
> >could u show us how u did that bypass? thanks.
> >
> >ming
> >
> >
> >
> >On Wed, 2006-03-08 at 19:13 +0100, Frederic Temporelli wrote:
> >  
> >
> >>Hello,
> >>
> >>I would like to report an ioctl issue using IET 0.4.13 (iSCSI target) 
> >>and kernel 2.6.16-rc1, running on mips / SGI O2
> >>
> >>The driver seems to load nicely, but there was no way to do ioctl on the 
> >>userspace device /dev/ietctl.
> >>I got such messages in syslog:
> >>Mar  4 16:47:16 o2 kernel: [4303606.514000] ioctl32(ietd:3448): Unknown 
> >>cmd fd(4) cmd(81046900){01} arg(7f942ab0) on /dev/ietctl
> >>
> >>=> I've been able to resolve the issue by adding a by-pass (goto 
> >>do_ioctl) in kernel compat_sys_ioctl function (fs/compat.c)  and all is 
> >>working fine now.
> >>
> >>I don't know if such issue is related to mips only or is due to changes 
> >>2.6.16 kernel
> >>I've also did some tries on x86 with linux 2.6.15.5, all was working 
> >>fine without needing to change anything in the kernel.
> >>
> >>Did somebody report such issue with IET and recent kernel ?
> >>May some people from linux-mips tell if such issue is mips specific ?
> >>
> >>Best regards.
> >>--
> >>Fred
> >>
> >>
> >>    
> >>
> >
> >
> >
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> >  
> >
> 
> 
> 


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