linux-kernel - Re: [RFC 11/32] xfs: convert to struct inode

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Message-ID: <20140602233212.GA2060@thunk.org>
Date:	Mon, 2 Jun 2014 19:32:12 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Chuck Lever <chuck.lever@...cle.com>,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Dave Chinner <david@...morbit.com>,
	LKML Kernel <linux-kernel@...r.kernel.org>,
	linux-arch@...r.kernel.org, joseph@...esourcery.com,
	john.stultz@...aro.org, Christoph Hellwig <hch@...radead.org>,
	tglx@...utronix.de, geert@...ux-m68k.org, lftan@...era.com,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>, xfs@....sgi.com,
	Linux NFS Mailing List <linux-nfs@...r.kernel.org>
Subject: Re: [RFC 11/32] xfs: convert to struct inode_time

On Mon, Jun 02, 2014 at 03:32:35PM -0700, H. Peter Anvin wrote:
> On 06/02/2014 03:29 PM, Theodore Ts'o wrote:
> > 
> > And since we are already returning (time_t) -1 in some cases, we might
> > as well try to make things a bit more formal.
> > 
> 
> Are we?  I am not aware of *Linux* actually using that.

Linux's time(2) can return (time_t) -1 and set errno to EFAULT, per
the Posix specification:

SYSCALL_DEFINE1(time, time_t __user *, tloc)
{
	time_t i = get_seconds();

	if (tloc) {
		if (put_user(i,tloc))
			return -EFAULT;
	}
	force_successful_syscall_return();
	return i;
}

Cheers,

						- Ted
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