linux-kernel - Re: Define termios_1 functions for powerpc, s390, avr32 and frv

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Message-Id: <20070913035506.b599e84f.akpm@linux-foundation.org>
Date:	Thu, 13 Sep 2007 03:55:06 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Paul Mundt <lethal@...ux-sh.org>
Cc:	Michael Neuling <mikey@...ling.org>, Jan Dittmer <jdi@....org>,
	Paul Mackerras <paulus@...ba.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tony Breeds <tony@...eyournoodle.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	Alan Cox <alan@...hat.com>, davem@...emloft.net,
	heiko.carstens@...ibm.com, hskinnemoen@...el.com,
	dhowells@...hat.com
Subject: Re: Define termios_1 functions for powerpc, s390, avr32 and frv

On Thu, 13 Sep 2007 18:53:46 +0900 Paul Mundt <lethal@...ux-sh.org> wrote:

> On Thu, Sep 13, 2007 at 05:22:36PM +1000, Michael Neuling wrote:
> > > > Commit f629307c857c030d5a3dd777fee37c8bb395e171 introduced uses of
> > > > kernel_termios_to_user_termios_1 and user_termios_to_kernel_termios_1
> > > > on all architectures.  However, powerpc, s390, avr32 and frv don't
> > > > currently define those functions since their termios struct didn't
> > > > need to be changed when the arbitrary baud rate stuff was added, and
> > > > thus the kernel won't currently build on those architectures.
> > > 
> > > alpha, parisc, sh, sparc{64,}, xtensa are still broken with this error...
> > 
> > They need to include <asm-generic/termios.h> in asm-<arch>/termios.h
> > like in powerpc.
> > 
> > Alternatively tonyb's patch should fix them.  Could also do that?
> > 
> Is there a consensus for this? It's a bit annoying to have this stuff
> broken this late in 2.6.23. If Tony's patch gets applied, then this stuff
> will work itself out. Otherwise everything has to be patched for
> asm-generic/termios.h. In which case.. here's the patch to define them on
> sh and sh64.

I think we need to go with Tony's patch.  sparc32 and sparc64 are
presently broken too, and the patch which converts sparc to use the
new interfaces introduces a few build errors.


From: Tony Breeds <tony@...eyournoodle.com>

Add Guards around TIOCSLCKTRMIOS and TIOCGLCKTRMIOS.

Signed-off-by: Tony Breeds <tony@...eyournoodle.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: "David S. Miller" <davem@...emloft.net>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 drivers/char/tty_ioctl.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff -puN drivers/char/tty_ioctl.c~sparc64-and-others-fix-tty_ioctlc-build drivers/char/tty_ioctl.c
--- a/drivers/char/tty_ioctl.c~sparc64-and-others-fix-tty_ioctlc-build
+++ a/drivers/char/tty_ioctl.c
@@ -795,6 +795,19 @@ int n_tty_ioctl(struct tty_struct * tty,
 			if (L_ICANON(tty))
 				retval = inq_canon(tty);
 			return put_user(retval, (unsigned int __user *) arg);
+#ifndef TCGETS2
+		case TIOCGLCKTRMIOS:
+			if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
+				return -EFAULT;
+			return 0;
+
+		case TIOCSLCKTRMIOS:
+			if (!capable(CAP_SYS_ADMIN))
+				return -EPERM;
+			if (user_termios_to_kernel_termios(real_tty->termios_locked, (struct termios __user *) arg))
+				return -EFAULT;
+			return 0;
+#else
 		case TIOCGLCKTRMIOS:
 			if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
 				return -EFAULT;
@@ -806,6 +819,7 @@ int n_tty_ioctl(struct tty_struct * tty,
 			if (user_termios_to_kernel_termios_1(real_tty->termios_locked, (struct termios __user *) arg))
 				return -EFAULT;
 			return 0;
+#endif
 
 		case TIOCPKT:
 		{
_

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