linux-ext4 - Re: [PATCH] ext4: Add support FALLOC_FL_INSERT

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Message-ID: <20150615042920.GI15793@thunk.org>
Date:	Mon, 15 Jun 2015 00:29:20 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Namjae Jeon <namjae.jeon@...sung.com>
Cc:	linux-ext4 <linux-ext4@...r.kernel.org>,
	Lukáš Czerner <lczerner@...hat.com>
Subject: Re: [PATCH] ext4: Add support FALLOC_FL_INSERT_RANGE for fallocate

On Fri, May 22, 2015 at 06:59:14PM +0900, Namjae Jeon wrote:
> This patch implements fallocate's FALLOC_FL_INSERT_RANGE for Ext4.
> 
> 1) Make sure that both offset and len are block size aligned.
> 2) Update the i_size of inode by len bytes.
> 3) Compute the file's logical block number against offset. If the computed
>    block number is not the starting block of the extent, split the extent
>    such that the block number is the starting block of the extent.
> 4) Shift all the extents which are lying between [offset, last allocated extent]
>    towards right by len bytes. This step will make a hole of len bytes
>    at offset.
> 
> Signed-off-by: Namjae Jeon <namjae.jeon@...sung.com>
> Signed-off-by: Ashish Sangwan <a.sangwan@...sung.com>

Thanks, applied.

						- Ted
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