linux-ext4 - Re: [PATCH -v2 2/3] mke2fs: print extra information about existing ext2/3/4 file systemsG

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Date:	Wed, 7 May 2014 08:39:13 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Lukáš Czerner <lczerner@...hat.com>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH -v2 2/3] mke2fs: print extra information about existing
 ext2/3/4 file systemsG

On Wed, May 07, 2014 at 10:15:56AM +0200, Lukáš Czerner wrote:
> > Yes, that's a cut and paste typo, thanks for spotting it.  It should
> > have been:
> > 
> > 	} else if (sb->s_mkfs_time) {
> > 		tm = sb->s_mkfs_time;
> > 		printf(_("\tcreated on %s"), ctime(&tm));
> > 	} else if (sb->s_mtime) {  <========
> 
> But you're already checking for sb->s_mtime in the first condition,
> am I missing something ?

The basic idea is to give one bit of context, and whatever would be
the most useful.  In order of preference, it's:

1)  Last mount directory (if available) and last mount time
2)  Time file system was created
3)  Time file system was written

#2 or #3 is only needed if the file system was never mounted.

#3 is only needed for those file systems that (a) were never mounted,
(b) was modified/filled via e2tools or debugfs.  (Or Windows FS SDK
based hacks, etc.)

					- Ted
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