linux-kernel - Re: [f2fs-dev] [PATCH 2/2] f2fs: put the inode page when error was occurred

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Date:	Wed, 19 Nov 2014 14:33:01 -0800
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 2/2] f2fs: put the inode page when error was
 occurred

On Tue, Nov 18, 2014 at 01:30:46PM +0800, Chao Yu wrote:
> Hi Jaegeuk,
> 
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> > Sent: Tuesday, November 18, 2014 9:58 AM
> > To: linux-kernel@...r.kernel.org; linux-fsdevel@...r.kernel.org;
> > linux-f2fs-devel@...ts.sourceforge.net
> > Cc: Jaegeuk Kim
> > Subject: [f2fs-dev] [PATCH 2/2] f2fs: put the inode page when error was occurred
> > 
> > We should put the inode page when error was occurred.
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> 
> You can add Reviewed-by: Chao Yu <chao2.yu@...sung.com>
> after the following issue is fixed.
> 
> > ---
> >  fs/f2fs/data.c | 10 ++++++----
> >  1 file changed, 6 insertions(+), 4 deletions(-)
> > 
> > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> > index 8f16443..12dd58a 100644
> > --- a/fs/f2fs/data.c
> > +++ b/fs/f2fs/data.c
> > @@ -963,22 +963,22 @@ repeat:
> >  		} else if (page->index == 0) {
> >  			err = f2fs_convert_inline_page(&dn, page);
> >  			if (err)
> > -				goto unlock_fail;
> > +				goto put_fail;
> >  		} else {
> >  			struct page *p = grab_cache_page(inode->i_mapping, 0);
> >  			if (!p) {
> >  				err = -ENOMEM;
> > -				goto unlock_fail;
> > +				goto put_fail;
> >  			}
> >  			err = f2fs_convert_inline_page(&dn, p);
> >  			f2fs_put_page(p, 1);
> >  			if (err)
> > -				goto unlock_fail;
> > +				goto put_fail;
> >  		}
> >  	}
> >  	err = f2fs_reserve_block(&dn, index);
> >  	if (err)
> > -		goto unlock_fail;
> > +		goto put_fail;
> 
> f2fs_reserve_block will do the clean work, we should not release dn again.

Well, I added this to handle errors consistently.
It's harmless, since f2fs_put_dnode removes the pointers after putting them.

Thanks,

> 
> Thanks,
> Yu
> 
> >  put_next:
> >  	f2fs_put_dnode(&dn);
> >  	f2fs_unlock_op(sbi);
> > @@ -1021,6 +1021,8 @@ out:
> >  	clear_cold_data(page);
> >  	return 0;
> > 
> > +put_fail:
> > +	f2fs_put_dnode(&dn);
> >  unlock_fail:
> >  	f2fs_unlock_op(sbi);
> >  	f2fs_put_page(page, 1);
> > --
> > 2.1.1
> > 
> > 
> > ------------------------------------------------------------------------------
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> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@...ts.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
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