linux-kernel - Re: [EXT4 set 3][PATCH 1/1] ext4 nanosecond timestamp

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Message-ID: <468B3FDA.7060809@linux.vnet.ibm.com>
Date:	Wed, 04 Jul 2007 12:06:10 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	cmm@...ibm.com
CC:	Kalpak Shah <kalpak@...sterfs.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [EXT4 set 3][PATCH 1/1] ext4 nanosecond timestamp



Mingming Cao wrote:
> On Tue, 2007-07-03 at 15:58 +0530, Kalpak Shah wrote:
>> On Sun, 2007-07-01 at 03:36 -0400, Mingming Cao wrote:
>>> +
>>> +#define EXT4_INODE_GET_XTIME(xtime, inode, raw_inode)			       \
>>> +do {									       \
>>> +	(inode)->xtime.tv_sec = le32_to_cpu((raw_inode)->xtime);	       \
>>> +	if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), xtime ## _extra))     \
>>> +		ext4_decode_extra_time(&(inode)->xtime,			       \
>>> +				       raw_inode->xtime ## _extra);	       \
>>> +} while (0)
>>> +
>>> +#define EXT4_EINODE_GET_XTIME(xtime, einode, raw_inode)			       \
>>> +do {									       \
>>> +	if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime))		       \
>>> +		(einode)->xtime.tv_sec = le32_to_cpu((raw_inode)->xtime);      \
>>> +	if (EXT4_FITS_IN_INODE(raw_inode, einode, xtime ## _extra))	       \
>>> +		ext4_decode_extra_time(&(einode)->xtime,		       \
>>> +				       raw_inode->xtime ## _extra);	       \
>>> +} while (0)
>>> +
>> This nanosecond patch seems to be missing the fix below which is required for http://bugzilla.kernel.org/show_bug.cgi?id=5079
>>
>> If the timestamp is set to before epoch i.e. a negative timestamp then the file may have its date set into the future on 64-bit systems. So when the timestamp is read it must be cast as signed.
> 
> Missed this one.
> Thanks. Will update ext4 patch queue tonight with this fix.
> 
>


IIRC in the conference call it was decided to not to apply this patch. Andreas may be able to update better.

-aneesh
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