From: Darrick J. Wong <djwong@xxxxxxxxxx> This test creates a couple of patterned files on a tiny filesystem, fragments the free space, clones one patterned file to the other, and checks that the entire file was cloned. However, this test doesn't work on a 64k fsblock filesystem because we've used up all the free space reservation for the rmapbt, and that causes the FICLONE to error out with ENOSPC partway through. Hence we need to detect the ENOSPC and _notrun the test. That said, it turns out that XFS has been silently dropping error codes if we managed to make some progress cloning extents. That's ok if the operation has REMAP_FILE_CAN_SHORTEN like copy_file_range does, but FICLONE/FICLONERANGE do not permit partial results, so the dropped error codes is actually an error. Therefore, this testcase now becomes a regression test for the patch to fix that. Signed-off-by: "Darrick J. Wong" <djwong@xxxxxxxxxx> --- tests/generic/562 | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/tests/generic/562 b/tests/generic/562 index 91360c4154a6a2..36bd02911c96b8 100755 --- a/tests/generic/562 +++ b/tests/generic/562 @@ -15,6 +15,9 @@ _begin_fstest auto clone punch . ./common/filter . ./common/reflink +test "$FSTYP" = "xfs" && \ + _fixed_by_kernel_commit XXXXXXXXXX "xfs: don't drop errno values when we fail to ficlone the entire range" + _require_scratch_reflink _require_test_program "punch-alternating" _require_xfs_io_command "fpunch" @@ -48,8 +51,11 @@ while true; do done # Now clone file bar into file foo. This is supposed to succeed and not fail -# with ENOSPC for example. -_reflink $SCRATCH_MNT/bar $SCRATCH_MNT/foo >>$seqres.full +# with ENOSPC for example. However, XFS will sometimes run out of space. +_reflink $SCRATCH_MNT/bar $SCRATCH_MNT/foo >>$seqres.full 2> $tmp.err +cat $tmp.err +test "$FSTYP" = "xfs" && grep -q 'No space left on device' $tmp.err && \ + _notrun "ran out of space while cloning" # Unmount and mount the filesystem again to verify the operation was durably # persisted.
