linux-kernel - RE: [f2fs-dev] [PATCH] f2fs:fix truncate_partial

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Date:	Tue, 29 Oct 2013 16:07:15 +0800
From:	"shifei10.ge" <shifei10.ge@...sung.com>
To:	jaegeuk.kim@...sung.com
Cc:	'??' <shu.tan@...sung.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: RE: [f2fs-dev] [PATCH] f2fs:fix truncate_partial_nodes bug



> -----Original Message-----
> From: Jaegeuk Kim [mailto:jaegeuk.kim@...sung.com]
> Sent: Tuesday, October 29, 2013 3:43 PM
> To: shifei10.ge
> Cc: '??'; linux-fsdevel@...r.kernel.org; linux-kernel@...r.kernel.org; linux-
> f2fs-devel@...ts.sourceforge.net
> Subject: RE: [f2fs-dev] [PATCH] f2fs:fix truncate_partial_nodes bug
> 
> Hi,
> 
> 2013-10-29 (화), 15:32 +0800, shifei10.ge:
> > Hi,I think we don't need to put the invalid page that get_node_page returned.
> > So I add " idx = i--" based on your version.Following is the patch:
> >
> > ---
> >  fs/f2fs/node.c |   13 +++++++------
> >  1 file changed, 7 insertions(+), 6 deletions(-)
> >
> > diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 304d5ce..fd5f721
> > 100644
> > --- a/fs/f2fs/node.c
> > +++ b/fs/f2fs/node.c
> > @@ -631,19 +631,19 @@ static int truncate_partial_nodes(struct dnode_of_data
> *dn,
> >  		return 0;
> >
> >  	/* get indirect nodes in the path */
> > -	for (i = 0; i < depth - 1; i++) {
> > +	for (i = 0; i < idx + 1; i++) {
> >  		/* refernece count'll be increased */
> >  		pages[i] = get_node_page(sbi, nid[i]);
> >  		if (IS_ERR(pages[i])) {
> > -			depth = i + 1;
> >  			err = PTR_ERR(pages[i]);
> > +			idx = i--;
> 
> You meant (idx = i - 1)?
> If so, idx = i--; is wrong.

Yes，here should be : idx = --i;

> 
> --
> Jaegeuk Kim
> Samsung

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