linux-ext4 - Re: [PATCH 1/5] ext4 online defrag header file changes

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Message-id: <20080314125848.GE3542@webber.adilger.int>
Date:	Fri, 14 Mar 2008 20:58:48 +0800
From:	Andreas Dilger <adilger@....com>
To:	Akira Fujita <a-fujita@...jp.nec.com>
Cc:	cmm@...ibm.com, tytso@....edu, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/5] ext4 online defrag header file changes

On Mar 14, 2008  21:02 +0900, Akira Fujita wrote:
> How about renaming this structure from ext4_extent_data to
> ext4_extent_info which used the extent in-core structure
> and put it into ext4_fs_extents.h? 
> Because in-core super_block is ext4_sb_info.
> 
> /*
>  * This is the extent in-core structure.
>  */
> struct ext4_extent_info {
> 	ext4_lblk_t	ee_block;	/* first logical block extent covers */
> 	int		ee_len;		/* number of blocks covered by extent */
> 	ext4_fsblk_t	ee_start;	/* first physical block extent covers */
> };      

Would it be possible to use the FIEMAP interface to get the file mapping
data to userspace?  That would avoid the need to have a second ioctl
with nearly the same data.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.

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