linux-ext4 - Re: [RFC 13/32] ext3: convert to struct inode

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Message-ID: <53899C95.80806@zytor.com>
Date:	Sat, 31 May 2014 02:10:45 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
CC:	linux-arch@...r.kernel.org, joseph@...esourcery.com,
	john.stultz@...aro.org, hch@...radead.org, tglx@...utronix.de,
	geert@...ux-m68k.org, lftan@...era.com,
	linux-fsdevel@...r.kernel.org, Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org
Subject: Re: [RFC 13/32] ext3: convert to struct inode_time

On 05/30/2014 01:01 PM, Arnd Bergmann wrote:
> ext3fs uses unsigned 32-bit seconds for inode timestamps, which will work
> for the next 92 years, but the VFS uses struct timespec for timestamps,
> which is only good until 2038 on 32-bit CPUs.
> 
> This gets us one small step closer to lifting the VFS limit by using
> struct inode_time in ext3. The on-disk format limit is lifted in ext4,
> which will work until 2514.
> 

This may be what the spec says, but when I experimented with this just
now it does seem that both ext2 and ext3 actually interpret timestamps
as *signed* 32-bit seconds.

	-hpa

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