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

From: Jaegeuk Kim
Date: Wed Nov 19 2014 - 17:33:18 EST


On Tue, Nov 18, 2014 at 01:30:46PM +0800, Chao Yu wrote:
> Hi Jaegeuk,
>
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@xxxxxxxxxx]
> > Sent: Tuesday, November 18, 2014 9:58 AM
> > To: linux-kernel@xxxxxxxxxxxxxxx; linux-fsdevel@xxxxxxxxxxxxxxx;
> > linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx
> > 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@xxxxxxxxxx>
>
> You can add Reviewed-by: Chao Yu <chao2.yu@xxxxxxxxxxx>
> 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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