RE: [PATCH] xfstests: fsstress: fix incorrect if condition check for collapse range mode

[Namjae Jeon <namjae.jeon@samsung.com>]

> On Wed, 30 Apr 2014, Namjae Jeon wrote:
> 
> > Date: Wed, 30 Apr 2014 19:11:32 +0900
> > From: Namjae Jeon <namjae.jeon@samsung.com>
> > To: Dave Chinner <david@fromorbit.com>
> > Cc: xfs@oss.sgi.com, linux-fsdevel@vger.kernel.org,
> >     Ashish Sangwan <a.sangwan@samsung.com>
> > Subject: [PATCH] xfstests: fsstress: fix incorrect if condition check for
> >     collapse range mode
> >
> > There is if condition to be block aligned for off and len of Collapse range.
> > But off and len for all fallocate opearion can be aligned by incorrect
> > if condition check.
> >
> > Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
> > Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
> > ---
> >  ltp/fsstress.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/ltp/fsstress.c b/ltp/fsstress.c
> > index 29fc250..ff9ed12 100644
> > --- a/ltp/fsstress.c
> > +++ b/ltp/fsstress.c
> > @@ -2230,7 +2230,7 @@ do_fallocate(int opno, long r, int mode)
> >  	 * Collapse range requires off and len to be block aligned, make it
> >  	 * more likely to be the case.
> >  	 */
> > -	if (FALLOC_FL_COLLAPSE_RANGE && (opno % 2)) {
> > +	if (mode & FALLOC_FL_COLLAPSE_RANGE && (opno % 2)) {
> >  		off = ((off + stb.st_blksize - 1) & ~(stb.st_blksize - 1));
> >  		len = ((len + stb.st_blksize - 1) & ~(stb.st_blksize - 1));
> >  	}
> 
> oops :). Thanks for fixing it. Even though it would be better to use
> parentheses
Hi Lukas.
Okay, I will send v2 patch.
Thanks for review!
> 
> +	if ((mode & FALLOC_FL_COLLAPSE_RANGE) && (opno % 2)) {
> 
> Reviewed-by: Lukas Czerner <lczerner@redhat.com>

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