linux-ext4 - Re: block allocation for ext2

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Date:	Thu, 18 Dec 2008 23:39:28 +0100
From:	Jan Kara <jack@...e.cz>
To:	Rohit Sharma <imreckless@...il.com>
Cc:	Kernelnewbies <kernelnewbies@...linux.org>,
	ext4 <linux-ext4@...r.kernel.org>
Subject: Re: block allocation for ext2_mkdir

> On Fri, Dec 19, 2008 at 12:12 AM, Rohit Sharma <imreckless@...il.com> wrote:
> > How does ext2 allocate blocks for directory.
> >
> > ext2_mkdir               calls            ext2_make_empty
> >
> > ext2_make_empty     calls           __ext2_write_begin
> >
> > __ ext2_write_begin   calls           block_write_begin
> >
> > my query is that how does this function allocates blocks for directories. ??
> >
> 
> Does ext2 uses ext2_get_block to allocate blocks for both files and
> directories. ??
  Yes, exactly. Ext2 (unlike ext3 or ext4) treats directories the same
ways as ordinary files and thus ext2_get_block is used for block
allocation.

								Honza

-- 
Jan Kara <jack@...e.cz>
SuSE CR Labs
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