On Wed, May 07, 2014 at 02:33:18PM +0200, David Disseldorp wrote: > With kernel commit 00fdf13a2e9f313a044288aa59d3b8ec29ff904a, the first > clone-range overwrite attempt now fails with EOPNOTSUPP, rather than > tripping a Btrfs BUG_ON(). > > This test now trips a new Btrfs bug, in which EIO is returned for > subsequent reads following the second clone range ioctl. > Hi David, Something different here, I didn't get EI on 3.15.0-rc4. thanks, -liubo > Signed-off-by: David Disseldorp <ddiss@xxxxxxx> > --- > tests/btrfs/035 | 11 +++++++++++ > tests/btrfs/035.out | 5 +++++ > 2 files changed, 16 insertions(+) > > diff --git a/tests/btrfs/035 b/tests/btrfs/035 > index 6808179..c9530f6 100755 > --- a/tests/btrfs/035 > +++ b/tests/btrfs/035 > @@ -57,21 +57,32 @@ src_str="aaaaaaaaaa" > echo -n "$src_str" > $SCRATCH_MNT/src > > $CLONER_PROG $SCRATCH_MNT/src $SCRATCH_MNT/src.clone1 > +cat $SCRATCH_MNT/src.clone1 > +echo > > src_str="bbbbbbbbbbcccccccccc" > > echo -n "$src_str" > $SCRATCH_MNT/src > > $CLONER_PROG $SCRATCH_MNT/src $SCRATCH_MNT/src.clone2 > +cat $SCRATCH_MNT/src.clone2 > +echo > > +# Prior to kernel commit 00fdf13a2e9f313a044288aa59d3b8ec29ff904a, this clone > +# resulted in a BUG_ON in __btrfs_drop_extents(). The kernel now returns > +# EOPNOTSUPP up to userspace. > snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone1 | awk '{print $5}'` > echo "attempting ioctl (src.clone1 src)" > $CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \ > $SCRATCH_MNT/src.clone1 $SCRATCH_MNT/src > +cat $SCRATCH_MNT/src > +echo > > snap_src_sz=`ls -lah $SCRATCH_MNT/src.clone2 | awk '{print $5}'` > echo "attempting ioctl (src.clone2 src)" > $CLONER_PROG -s 0 -d 0 -l ${snap_src_sz} \ > $SCRATCH_MNT/src.clone2 $SCRATCH_MNT/src > +# BUG: subsequent access attempts currently result in EIO... > +cat $SCRATCH_MNT/src > > status=0 ; exit > diff --git a/tests/btrfs/035.out b/tests/btrfs/035.out > index f86cadf..0ea2c4f 100644 > --- a/tests/btrfs/035.out > +++ b/tests/btrfs/035.out > @@ -1,3 +1,8 @@ > QA output created by 035 > +aaaaaaaaaa > +bbbbbbbbbbcccccccccc > attempting ioctl (src.clone1 src) > +clone failed: Operation not supported > +bbbbbbbbbbcccccccccc > attempting ioctl (src.clone2 src) > +bbbbbbbbbbcccccccccc > -- > 1.8.4.5 > _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs