generic/410: don't blow away seqres.full during test

Don't truncate $seqres.full every time we format a new filesystem; this
makes debugging of this weird failure:

  --- /tmp/fstests/tests/generic/410.out	2023-07-11 12:18:21.642971022 -0700
  +++ /var/tmp/fstests/generic/410.out.bad	2023-11-29 01:13:00.020000000 -0800
  @@ -107,6 +107,9 @@ mpB/dir SCRATCH_DEV
   mpC SCRATCH_DEV
   mpC/dir SCRATCH_DEV
   ======
  +mkdir: cannot create directory '/mnt/410/3871733_mpA': File exists
  +mkdir: cannot create directory '/mnt/410/3871733_mpB': File exists
  +mkdir: cannot create directory '/mnt/410/3871733_mpC': File exists
   make-shared a slave shared mount
   before make-shared run on slave shared
   ------

nearly impossible.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>

diff --git a/tests/generic/410 b/tests/generic/410
index 8cc36d9f381bdef1514709c49cee4f87c89d185d..5fb5441a0c96e496ef153c6772108bdc653704a4 100755 (executable)
--- a/tests/generic/410
+++ b/tests/generic/410
@@ -93,7 +93,7 @@ start_test()
 {
        local type=$1
 
-       _scratch_mkfs >$seqres.full 2>&1
+       _scratch_mkfs >>$seqres.full 2>&1
        _get_mount -t $FSTYP $SCRATCH_DEV $MNTHEAD
        $MOUNT_PROG --make-"${type}" $MNTHEAD
        mkdir $mpA $mpB $mpC