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Date: Mon, 23 Aug 2010 01:43:50 +0530
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From: aditya sarawgi <sarawgi.aditya@gmail.com>
To: gnehzuil <gnehzuil@gmail.com>
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Cc: fs@freebsd.org
Subject: Re: [patch] ext4fs read only mode
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On Sun, Aug 22, 2010 at 4:47 PM, gnehzuil <gnehzuil@gmail.com> wrote:
> Hi all,
>
> This patch makes ext2fs can read ext4 filesystem in read-only mode. There
> are two files in attachments. 'ext4fs_ro_makefile.patch' is for Makefile in
> modules/ext2fs/. 'ext4fs_ro_src.patch' is for source code in fs/ext2fs/.
> Please use the following command to mount disk: 'mount -t ext2fs -r /dev/XXX
> /YYY'.
>

Hi,

Since ext2fs and ext4fs are different, are we planning to have a
different module for ext4fs and hence different source directories

> Now you can use it to read data from ext4 filesystem in the following
> features:
>
> + HAS_JOURNAL(*)
> + FILE_TYPE
> + SPARSE_SUPER
> + HUGE_FILE
> + EXTENTS
> + DIR_NLINK
> + UNINIT_BG
> + FLEX_BG(*)
> + EXTRA_ISIZE(*)
> + DIR_INDEX(**)
>
>
> * I don't implement this feature. However you don't need to worry about it
> because it doesn't be used in read-only mode.
>
> ** I have implemented a hash directory index in ext2_lookup() function. But
> there are two functions that I think they seem to be contaminated kernel
> source code. So this patch doesn't include hash directory index.
>
> Please test it.
>
>
> Best regards,
>
> lz
>
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>



-- 
Cheers,
Aditya Sarawgi