linux-ext4 - Re: [PATCH v5] e2image: add option to ignore fs errors

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Date:   Thu, 20 May 2021 12:25:10 +0300
From:   Благодаренко Артём 
        <artem.blagodarenko@...il.com>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     linux-ext4@...r.kernel.org, adilger.kernel@...ger.ca,
        Alexey Lyashkov <alexey.lyashkov@....com>,
        Artem Blagodarenko <artem.blagodarenko@....com>
Subject: Re: [PATCH v5] e2image: add option to ignore fs errors

Hello.

Andreas, thank you for the review. 
It looks like remarks don’t require v6 and can be fixed during a merge.

Does anybody has other any objections/ideas?

Thanks.
Artem Blagodarenko.

> On 23 Apr 2021, at 19:25, Andreas Dilger <adilger@...ger.ca> wrote:
> 
> On Apr 23, 2021, at 07:30, Artem Blagodarenko <artem.blagodarenko@...il.com> wrote:
>> 
>> Add extended "-E ignore_error" option to be more tolerant
>> to fs errors while scanning inode extents.
> 
> Not to be pedantic, but should this allow "ignore_errors", since it will
> presumably ignore more than one error.  If already using "ignore_error"
> in the field you could accept both for some time until able to change over,
> as we've done with "ea_inode" vs. "large_xattr" in the Lustre e2fsprogs
> for years. 
> 
>> Changes since preveious version:
>> - rebased on top of the master
> 
> This should go after the "---" so that it isn't in the final commit message. 
> 
>> Signed-off-by: Alexey Lyashkov <alexey.lyashkov@....com>
>> Signed-off-by: Artem Blagodarenko <artem.blagodarenko@....com>
>> Cray-bug-id: LUS-1922
>> Change-Id: Ib79300656726839b1d3b7ee1dd0793c60679d296
>> Reviewed-by: Andreas Dilger <adilger@...ger.ca>
>> ---
> 
> One typo in the man page below:
> 
>> diff --git a/misc/e2image.8.in b/misc/e2image.8.in
>> index cb176f5d..45a06d3b 100644
>> --- a/misc/e2image.8.in
>> +++ b/misc/e2image.8.in
>> @@ -137,6 +144,16 @@ useful if the file system is being cloned to a flash-based storage device
>> (where reads are very fast and where it is desirable to avoid unnecessary
>> writes to reduce write wear on the device).
>> .TP
>> +.BI \-E " extended_options"
>> +Set e2iamge extended options.
> 
> "e2image"
> 
> Ted could fix this in the final commit
> Cheers, Andreas
> 
>> Extended options are comma separated, and
>> +may take an argument using the equals ('=') sign.  The following options
>> +are supported:
>> +.RS 1.2i
>> +.TP
>> +.BI ignore_error
>> +Grab an image from a corrupted FS and ignore fs errors.
>> +.RE
>> +.TP
>> .B \-f
>> Override the read-only requirement for the source filesystem when saving
>> the image file using the