From: Arnd Bergmann <arnd@arndb.de>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Miller <davem@davemloft.net>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
osst@riede.org, "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Kai.Makisara@kolumbus.fi,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
IDE-ML <linux-ide@vger.kernel.org>,
linux-s390 <linux-s390@vger.kernel.org>,
osst-users@lists.sourceforge.net,
linux-scsi <linux-scsi@vger.kernel.org>,
Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH 11/11] compat_ioctl: move tape handling into drivers
Date: Tue, 11 Sep 2018 22:13:18 +0200 [thread overview]
Message-ID: <CAK8P3a0nrNUpcYZiV7T14HXPfoiR4LyMM6E+8fP6AWgRMgDpxA@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a0evhaJGL_XdUjQhJDGyAh01UjLFkKx-Cq21htXmFsY2A@mail.gmail.com>
On Tue, Sep 11, 2018 at 5:36 PM Arnd Bergmann <arnd@arndb.de> wrote:
>
> On Sun, Sep 9, 2018 at 6:38 AM Al Viro <viro@zeniv.linux.org.uk> wrote:
> >
> > On Sat, Sep 08, 2018 at 04:28:17PM +0200, Arnd Bergmann wrote:
> > > MTIOCPOS and MTIOCGET are incompatible between 32-bit and 64-bit user
> > > space, and traditionally have been translated in fs/compat_ioctl.c.
> > >
> > > To get rid of that translation handler, move a corresponding
> > > implementation into each of the four drivers implementing those commands.
> > >
> > > The interesting part of that is now in a new linux/mtio.h header that
> > > wraps the existing uapi/linux/mtio.h header and provides an abstraction
> > > to let drivers handle both cases easily.
> >
> > Ugh... Frankly, this bool compat passed all way down looks wrong.
> > I can live with that; the question is whether block folks will be
> > OK with that thing...
>
> I have tried to come up with an alternative, but couldn't really find anything
> that is less ugly. Since nobody else complained, I'll resend this version
> along with the other patches.
Actually, there was one idea that Deepa mentioned for another subsystem
with a similar issue: instead of passing down the fact that we come from
a compat syscall through multiple function calls, the lowest ones
(put_user_mtpos, put_user_mtget) could call in_compat_syscall().
Would you prefer that?
Arnd
prev parent reply other threads:[~2018-09-12 1:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-08 14:28 [PATCH 01/11] compat_ioctl: remove keyboard ioctl translation Arnd Bergmann
2018-09-08 14:28 ` [PATCH 02/11] compat_ioctl: remove HIDIO translation Arnd Bergmann
2018-09-08 14:28 ` [PATCH 03/11] compat_ioctl: remove translation for sound ioctls Arnd Bergmann
2018-09-09 4:16 ` Al Viro
2018-09-11 19:35 ` Arnd Bergmann
2018-09-08 14:28 ` [PATCH 04/11] compat_ioctl: remove isdn ioctl translation Arnd Bergmann
2018-09-08 14:28 ` [PATCH 05/11] compat_ioctl: remove IGNORE_IOCTL() Arnd Bergmann
2018-09-08 14:28 ` [PATCH 06/11] compat_ioctl: remove /dev/random commands Arnd Bergmann
2018-09-09 4:11 ` Al Viro
2018-09-11 20:26 ` Arnd Bergmann
2018-09-12 5:28 ` Martin Schwidefsky
2018-09-12 14:02 ` Arnd Bergmann
2018-09-13 6:42 ` Martin Schwidefsky
2018-09-13 8:13 ` Arnd Bergmann
2018-09-08 14:28 ` [PATCH 07/11] compat_ioctl: remove joystick ioctl translation Arnd Bergmann
2018-09-08 14:28 ` [PATCH 08/11] compat_ioctl: remove PCI " Arnd Bergmann
2018-09-08 14:28 ` [PATCH 09/11] compat_ioctl: remove /dev/raw " Arnd Bergmann
2018-09-08 14:28 ` [PATCH 10/11] compat_ioctl: remove last RAID handling code Arnd Bergmann
2018-09-08 14:28 ` [PATCH 11/11] compat_ioctl: move tape handling into drivers Arnd Bergmann
2018-09-09 4:37 ` Al Viro
2018-09-11 15:36 ` Arnd Bergmann
2018-09-11 20:13 ` Arnd Bergmann [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAK8P3a0nrNUpcYZiV7T14HXPfoiR4LyMM6E+8fP6AWgRMgDpxA@mail.gmail.com \
--to=arnd@arndb.de \
--cc=Kai.Makisara@kolumbus.fi \
--cc=davem@davemloft.net \
--cc=heiko.carstens@de.ibm.com \
--cc=jejb@linux.vnet.ibm.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=osst-users@lists.sourceforge.net \
--cc=osst@riede.org \
--cc=schwidefsky@de.ibm.com \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).