2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
7 # Test absolute redirect is followed even if ancestor is opaque
9 # Typically, when following absolute redirect, if an opauqe dentry is
10 # found, lookup in further lower directories is stopped. But if a
11 # child dentry has another absolute redirect, then lookup in further
12 # lower layers should continue.
14 # Say, following is example setup.
15 # upper: /redirect (redirect=/a/b/c)
16 # lower1: /a/[b]/c ([b] is opaque) (c has absolute redirect=/a/b/d/)
19 # "redirect" directory in upper should merge with lower1:/a/b/c/ and
20 # lower0:/a/b/d/, despite lower1:/a/b/ being opaque.
23 seqres=$RESULT_DIR/$seq
24 echo "QA output created by $seq"
28 status=1 # failure is the default!
29 trap "_cleanup; exit \$status" 0 1 2 3 15
37 # get standard environment, filters and checks
41 # remove previous $seqres.full before test
44 # real QA test starts here
46 # We use non-default scratch underlying overlay dirs, we need to check
47 # them explicity after test.
48 _require_scratch_nocheck
49 _require_scratch_overlay_features redirect_dir
51 # remove all files from previous tests
54 # Create test directories
55 lowerdir=$OVL_BASE_SCRATCH_MNT/lower
56 lowerdir2=$OVL_BASE_SCRATCH_MNT/lower2
57 upperdir=$OVL_BASE_SCRATCH_MNT/upper
58 workdir=$OVL_BASE_SCRATCH_MNT/workdir
59 workdir2=$OVL_BASE_SCRATCH_MNT/workdir2
61 mkdir -p $lowerdir $lowerdir2 $upperdir $workdir $workdir2
62 mkdir -p $lowerdir/origin
63 touch $lowerdir/origin/foo
64 _overlay_scratch_mount_dirs $lowerdir $lowerdir2 $workdir2 -o redirect_dir=on
66 # Create opaque parent with absolute redirect child in middle layer
67 mkdir $SCRATCH_MNT/pure
68 mv $SCRATCH_MNT/origin $SCRATCH_MNT/pure/redirect
69 $UMOUNT_PROG $SCRATCH_MNT
70 _overlay_scratch_mount_dirs $lowerdir2:$lowerdir $upperdir $workdir -o redirect_dir=on
71 mv $SCRATCH_MNT/pure/redirect $SCRATCH_MNT/redirect
72 # List content of renamed merge dir before mount cycle
73 ls $SCRATCH_MNT/redirect/
75 # Verify that redirects are followed by listing content of renamed merge dir
77 $UMOUNT_PROG $SCRATCH_MNT
78 _overlay_scratch_mount_dirs $lowerdir2:$lowerdir $upperdir $workdir -o redirect_dir=on
79 ls $SCRATCH_MNT/redirect/
82 _overlay_check_scratch_dirs "$lowerdir2:$lowerdir" $upperdir $workdir -o redirect_dir=on