linux-ext4 - Re: [RFC][PATCH 0/3] ext4 online defrag (ver 0.2)

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Message-ID: <015201c73b89$70f521e0$4168010a@bsd.tnes.nec.co.jp>
Date:	Fri, 19 Jan 2007 14:19:44 +0900
From:	"Takashi Sato" <sho@...s.nec.co.jp>
To:	"Andreas Dilger" <adilger@...sterfs.com>,
	"Joel Becker" <Joel.Becker@...cle.com>
Cc:	<linux-ext4@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>
Subject: Re: [RFC][PATCH 0/3] ext4 online defrag (ver 0.2)

Hi,

>> On Jan 16, 2007  21:03 +0900, sho@...s.nec.co.jp wrote:
>>> 1. Add new ioctl(EXT4_IOC_DEFRAG) which returns the first physical
>>>    block number of the specified file.  With this ioctl, a command
>>>    gets the specified directory's.
>>
>> Maybe I don't understand, but how is this different from the long-time
>> FIBMAP ioctl?
> 
> I can use FIBMAP instead of my new ioctl.
> You are right.  I should have used FIBMAP ioctl...

I have to get the physical block number of the specified directory.
But FIBMAP is available only for a regular file, not for a directory.
So I will use my new ioctl.

Cheers, Takashi
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