linux-ext4 - Re: [PATCH] ext4: add sysfs entry showing whether the fs contains errors

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Date:	Wed, 7 May 2014 10:44:34 +0200 (CEST)
From:	Lukáš Czerner <lczerner@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
cc:	"Darrick J. Wong" <darrick.wong@...cle.com>,
	linux-ext4@...r.kernel.org, nikola.ciprich@...uxbox.cz
Subject: Re: [PATCH] ext4: add sysfs entry showing whether the fs contains
 errors

On Tue, 6 May 2014, Theodore Ts'o wrote:

> Date: Tue, 6 May 2014 15:23:26 -0400
> From: Theodore Ts'o <tytso@....edu>
> To: Darrick J. Wong <darrick.wong@...cle.com>
> Cc: Lukas Czerner <lczerner@...hat.com>, linux-ext4@...r.kernel.org,
>     nikola.ciprich@...uxbox.cz
> Subject: Re: [PATCH] ext4: add sysfs entry showing whether the fs contains
>     errors
> 
> On Tue, May 06, 2014 at 10:43:01AM -0700, Darrick J. Wong wrote:
> > 
> > Minor complaint: "contains" makes me think that cat'ing that file will return
> > either 0 or 1, not a string of error text.  Perhaps we could shorten it to
> > /sys/fs/ext4/sda/errors ?
> 
> What I'd suggest doing is simply calling it errors_count, and
> returning s_error_count.  While we're at it, we could also return
> s_first_error_time and s_last_error_time as well, since I imagine
> those would could be quite useful for someone trying to create a
> system health monitoring daemon.
> 
> Cheers,
> 
> 						- Ted

Right now I am using the same function which prints this information
to the log. So I am going to use simpler output for the sysfs.

<error count> <first time> <function>:<line> <last time> <function>:<line>

That should be easy to parse. I think that just calling it errors is
good enough.

Thanks!
-Lukas
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