Re: [PATCH] xfs: preserve DIFLAG2_NREXT64 when setting other inode attributes

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On Mon, Jun 06, 2022 at 08:29:40AM +1000, Dave Chinner wrote:
> On Sun, Jun 05, 2022 at 09:35:43AM -0700, Darrick J. Wong wrote:
> > From: Darrick J. Wong <djwong@xxxxxxxxxx>
> > 
> > It is vitally important that we preserve the state of the NREXT64 inode
> > flag when we're changing the other flags2 fields.
> > 
> > Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> > ---
> >  fs/xfs/xfs_ioctl.c |    3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> Fixes tag?

Does this really need one?  NREXT64 is still experimental, none of this
code is in any released kernel, and I'm not even sure what would be a
good target -- the patch that introduced XFS_DIFLAG_NREXT64?

> > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
> > index 5a364a7d58fd..0d67ff8a8961 100644
> > --- a/fs/xfs/xfs_ioctl.c
> > +++ b/fs/xfs/xfs_ioctl.c
> > @@ -1096,7 +1096,8 @@ xfs_flags2diflags2(
> >  {
> >  	uint64_t		di_flags2 =
> >  		(ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
> > -				   XFS_DIFLAG2_BIGTIME));
> > +				   XFS_DIFLAG2_BIGTIME |
> > +				   XFS_DIFLAG2_NREXT64));
> >  
> >  	if (xflags & FS_XFLAG_DAX)
> >  		di_flags2 |= XFS_DIFLAG2_DAX;
> 
> Otherwise looks good.
> 
> Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>

Thx. :)

--D

> 
> -Dave.
> -- 
> Dave Chinner
> david@xxxxxxxxxxxxx



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