linux-ext4 - Re: [PATCH] ext4: update ctime and mtime for truncate with extents.

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Date:	Thu, 10 Apr 2008 07:14:47 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Solofo.Ramangalahy@...l.net
Cc:	linux-ext4@...r.kernel.org, Szabolcs Szakacsits <szaka@...s-3g.com>
Subject: Re: [PATCH] ext4: update ctime and mtime for truncate with extents.

On Thu, 2008-04-10 at 15:11 +0200, Solofo.Ramangalahy@...l.net wrote:
> Mingming Cao writes:
>  > Shouldn't we mark inode dirty after the ctime and and mtime is changed?
> 
> I should have been more careful when mimicing the non-extent case or
> examine more closely the patch queue (I am just noticing
> ext4-update-mtime-and-ctime-on-rename.patch). I honestly do not have
> a definitive answer now, but I trust you and Jan more than me.
> 
> ... so, yes, we should.
> 
> Looking back at the code, there is actually a pattern
> ext4_current_time() followed by ext4_mark_inode_dirty(), but I do not
> think it is worth a refactoring.
> 
> Attached the updated patch.
> 
> Thanks and sorry for the trouble,

Np, I updated the patch in the patch queue. BTW, it would be nice to
generate the patch with -p next time to show which function the changes
are modifying.

Mingming
> --
> solofo
> 
> ext4: update ctime and mtime for truncate with extents.
> 
> From: Solofo Ramangalahy <Solofo.Ramangalahy@...l.net>
> 
> The recently announced "Linux POSIX file system test suite"
> http://ntfs3g.org/sw/qa/pjd-fstest-20080402.tgz catched a truncate
> issue when using extents:
> mtime and ctime are not updated despite truncate being successful.
> 
> This is the single issue catched with "default" ext4 (mkfs and mount
> with minimal options).
> The testsuite does not report failure with -o noextents.
> 
> With the following patch, all tests of the testsuite passes:
> 
> Signed-off-by: Solofo Ramangalahy <Solofo.Ramangalahy@...l.net>
> 
> ---
>  fs/ext4/extents.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> Index: linux-2.6.25-rc8-git5-ext4-52c7a8013ad2c452551a68ff4daab4bacbe28f9d/fs/ext4/extents.c
> ===================================================================
> --- linux-2.6.25-rc8-git5-ext4-52c7a8013ad2c452551a68ff4daab4bacbe28f9d.orig/fs/ext4/extents.c
> +++ linux-2.6.25-rc8-git5-ext4-52c7a8013ad2c452551a68ff4daab4bacbe28f9d/fs/ext4/extents.c
> @@ -2947,6 +2947,8 @@ out_stop:
>                 ext4_orphan_del(handle, inode);
> 
>         up_write(&EXT4_I(inode)->i_data_sem);
> +       inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
> +       ext4_mark_inode_dirty(handle, inode);
>         ext4_journal_stop(handle);
>  }
> --
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