2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved.
5 # FS QA Test No. btrfs/191
7 # Test that an incremental send operation works after deduplicating into the
8 # same file in both the parent and send snapshots.
11 seqres=$RESULT_DIR/$seq
12 echo "QA output created by $seq"
15 status=1 # failure is the default!
16 trap "_cleanup; exit \$status" 0 1 2 3 15
21 rm -fr $send_files_dir
25 # get standard environment, filters and checks
30 # real QA test starts here
33 _require_scratch_dedupe
36 send_files_dir=$TEST_DIR/btrfs-test-$seq
39 rm -fr $send_files_dir
42 _scratch_mkfs >>$seqres.full 2>&1
45 # Create our first file. The first half of the file has several 64Kb extents
46 # while the second half as a single 512Kb extent.
47 $XFS_IO_PROG -f -s -c "pwrite -S 0xb8 -b 64K 0 512K" $SCRATCH_MNT/foo \
49 $XFS_IO_PROG -c "pwrite -S 0xb8 512K 512K" $SCRATCH_MNT/foo | _filter_xfs_io
51 # Create the base snapshot and the parent send stream from it.
52 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 \
55 $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1 2>&1 \
58 # Create our second file, that has exactly the same data as the first file.
59 $XFS_IO_PROG -f -c "pwrite -S 0xb8 0 1M" $SCRATCH_MNT/bar | _filter_xfs_io
61 # Create the second snapshot, used for the incremental send, before doing the
63 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 \
66 # Now before creating the incremental send stream:
68 # 1) Deduplicate into a subrange of file foo in snapshot mysnap1. This will drop
69 # several extent items and add a new one, also updating the inode's iversion
70 # (sequence field in inode item) by 1, but not any other field of the inode;
72 # 2) Deduplicate into a different subrange of file foo in snapshot mysnap2. This
73 # will replace an extent item with a new one, also updating the inode's
74 # iversion by 1 but not any other field of the inode.
76 # After these two deduplication operations, the inode items, for file foo, are
77 # identical in both snapshots, but we have different extent items for this inode
78 # in both snapshots. We want to check this doesn't cause send to fail with an
79 # error or produce an incorrect stream.
81 $XFS_IO_PROG -r -c "dedupe $SCRATCH_MNT/bar 0 0 512K" $SCRATCH_MNT/mysnap1/foo \
84 $XFS_IO_PROG -r -c "dedupe $SCRATCH_MNT/bar 512K 512K 512K" \
85 $SCRATCH_MNT/mysnap2/foo | _filter_xfs_io
87 # Create the incremental send stream.
88 $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
89 $SCRATCH_MNT/mysnap2 2>&1 | _filter_scratch
91 # Create the checksums to verify later that the send streams produce correct
93 $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
94 $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
95 -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2
97 # Now recreate the filesystem by receiving both send streams and verify we get
98 # the same content that the original filesystem had.
100 _scratch_mkfs >>$seqres.full 2>&1
103 $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT
104 $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT
105 $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
106 $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2