2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2013 Red Hat, Inc. All Rights Reserved.
9 # 1) create ext4 filesystem & populate it
10 # 2) convert it to btrfs, mount it, verify contents
11 # 3) verify archived ext4 image integriy & contents
12 # 4) populate btrfs fs with new data
13 # 5) roll back conversion to original ext4
14 # 6) verify rolled-back fs integrity & contents
17 seqres=$RESULT_DIR/$seq
18 echo "== QA output created by $seq"
22 status=1 # failure is the default!
23 trap "_cleanup; exit \$status" 0 1 2 3 15
31 # get standard environment, filters and checks
33 . ./common/filter.btrfs
35 # real QA test starts here
37 # Modify as appropriate.
40 _require_scratch_nocheck
42 _require_command "$BTRFS_CONVERT_PROG" btrfs-convert
43 _require_command "$MKFS_EXT4_PROG" mkfs.ext4
44 _require_command "$E2FSCK_PROG" e2fsck
48 BLOCK_SIZE=`_get_block_size $TEST_DIR`
50 # Create & populate an ext4 filesystem
51 $MKFS_EXT4_PROG -F -b $BLOCK_SIZE $SCRATCH_DEV > $seqres.full 2>&1 || \
52 _notrun "Could not create ext4 filesystem"
53 # Manual mount so we don't use -t btrfs or selinux context
54 mount -t ext4 $SCRATCH_DEV $SCRATCH_MNT
56 cp -aR /lib/modules/`uname -r`/ $SCRATCH_MNT
59 # Convert it to btrfs, mount it, verify the data
60 $BTRFS_CONVERT_PROG $SCRATCH_DEV >> $seqres.full 2>&1 || \
61 _fail "btrfs-convert failed"
62 _try_scratch_mount || _fail "Could not mount new btrfs fs"
63 # (Ignore the symlinks which may be broken/nonexistent)
64 diff -r /lib/modules/`uname -r`/ $SCRATCH_MNT/`uname -r`/ 2>&1 | grep -vw "source\|build"
66 # Old ext4 image file should exist & be consistent
67 $E2FSCK_PROG -fn $SCRATCH_MNT/ext2_saved/image >> $seqres.full 2>&1 || \
68 _fail "archived ext4 image is corrupt"
70 # And the files in that image should match
71 mkdir -p $SCRATCH_MNT/mnt
72 mount -o loop $SCRATCH_MNT/ext2_saved/image $SCRATCH_MNT/mnt || \
73 _fail "could not loop mount saved ext4 image"
74 # Ignore the symlinks which may be broken/nonexistent
75 diff -r /lib/modules/`uname -r`/ $SCRATCH_MNT/mnt/`uname -r`/ 2>&1 | grep -vw "source\|build"
76 umount $SCRATCH_MNT/mnt
78 # Now put some fresh data on the btrfs fs
79 mkdir -p $SCRATCH_MNT/new
80 cp -aR /lib/modules/`uname -r`/ $SCRATCH_MNT/new
84 # Now restore the ext4 device
85 $BTRFS_CONVERT_PROG -r $SCRATCH_DEV >> $seqres.full 2>&1 || \
86 _fail "btrfs-convert rollback failed"
89 $E2FSCK_PROG -fn $SCRATCH_DEV >> $seqres.full 2>&1 || \
90 _fail "restored ext4 image is corrupt"
92 # Mount the un-converted ext4 device & check the contents
93 mount -t ext4 $SCRATCH_DEV $SCRATCH_MNT
94 # (Ignore the symlinks which may be broken/nonexistent)
95 diff -r /lib/modules/`uname -r`/ $SCRATCH_MNT/`uname -r`/ 2>&1 | grep -vw "source\|build"
99 # Convert it to btrfs, mount it and delete "ext2_saved"
100 $BTRFS_CONVERT_PROG $SCRATCH_DEV >> $seqres.full 2>&1 || \
101 _fail "btrfs-convert failed"
102 _try_scratch_mount || _fail "Could not mount new btrfs fs"
103 $BTRFS_UTIL_PROG subvolume delete $SCRATCH_MNT/ext2_saved >> $seqres.full 2>&1 ||
104 _fail "failed to delete ext2_saved subvolume"
107 # Now restore the ext4 device, expecting a failure
108 $BTRFS_CONVERT_PROG -r $SCRATCH_DEV >> $seqres.full 2>&1
109 [ $? -eq 1 ] || _fail "Failure is expected, but btrfs-convert returns with rollback complete"