linux-ext4 - Re: [PATCH v2 4/4] man: add -b option to e2image

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Date:   Mon, 20 Nov 2017 12:59:27 -0700
From:   Andreas Dilger <adilger@...ger.ca>
To:     Artem Blagodarenko <artem.blagodarenko@...il.com>
Cc:     linux-ext4 <linux-ext4@...r.kernel.org>,
        Artem Blagodarenko <artem.blagodarenko@...gate.com>
Subject: Re: [PATCH v2 4/4] man: add -b option to e2image

On Nov 16, 2017, at 6:55 AM, Artem Blagodarenko <artem.blagodarenko@...il.com> wrote:
> 
> From: Artem Blagodarenko <artem.blagodarenko@...gate.com>
> 
> Add manual page for e2image -b option.
> 
> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...il.com>

Personally, I would include this into the patch that adds this option,
but it looks fine as-is.

Reviewed-by: Andreas Dilger <adilger@...ger.ca>

> ---
> misc/e2image.8.in | 32 ++++++++++++++++++++++++++++++++
> 1 file changed, 32 insertions(+)
> 
> diff --git a/misc/e2image.8.in b/misc/e2image.8.in
> index f28a76ea..d6125bb4 100644
> --- a/misc/e2image.8.in
> +++ b/misc/e2image.8.in
> @@ -11,6 +11,14 @@ e2image \- Save critical ext2/ext3/ext4 filesystem metadata to a file
> .B \-r|Q
> ]
> [
> +.B \-b
> +.I superblock
> +]
> +[
> +.B \-B
> +.I blocksize
> +]
> +[
> .B \-fr
> ]
> .I device
> @@ -167,6 +175,22 @@ the
> option will prevent analysis of problems related to hash-tree indexed
> directories.
> .PP
> +Option
> +.B \-b
> +.I superblock
> +can be used to get image from partition with broken primary superblock.
> +The partition is copied as is including broken primary superblock.
> +.PP
> +Option
> +.B \-B
> +.I blocksize
> +can be used to set superblock block size. Normally,  e2fsck  will  search
> +for  the superblock at various different block sizes in an attempt to find
> +the appropriate blocksize. This search can be fooled in some cases.  This
> +option forces e2fsck to only try locating the superblock at a particular
> +blocksize. If the superblock is not found, e2fsck will terminate with a
> +fatal error.
> +.PP
> Note that this will work even if you substitute "/dev/hda1" for another raw
> disk image, or QCOW2 image previously created by
> .BR e2image .
> @@ -217,6 +241,14 @@ This can be useful to write a qcow2 image containing all data to a
> sparse image file where it can be loop mounted, or to a disk partition.
> Note that this may not work with qcow2 images not generated by e2image.
> .PP
> +Options
> +.B \-b
> +.I superblock
> +and
> +.B \-B
> +.I blocksize
> +can be used same way as for raw images.
> +.PP
> .SH INCLUDING DATA
> Normally
> .B e2image
> --
> 2.13.6 (Apple Git-96)
> 


Cheers, Andreas






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