2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
5 # FS QA Test No. btrfs/149
7 # Test that an incremental send/receive operation will not fail when the
8 # destination filesystem has compression enabled and the source filesystem
9 # has an extent at a file offset 0 that is not compressed and that is
13 seqres=$RESULT_DIR/$seq
14 echo "QA output created by $seq"
17 status=1 # failure is the default!
18 trap "_cleanup; exit \$status" 0 1 2 3 15
23 rm -fr $send_files_dir
27 # get standard environment, filters and checks
32 # real QA test starts here
36 _require_scratch_reflink
38 _require_btrfs_command inspect-internal dump-super
40 send_files_dir=$TEST_DIR/btrfs-test-$seq
43 rm -fr $send_files_dir
46 _scratch_mkfs >>$seqres.full 2>&1
47 # On 64K pagesize systems the compression is more efficient, so max_inline
48 # helps to create regular (non inline) extent irrespective of the final
50 _scratch_mount "-o compress -o max_inline=0"
52 # Write to our file using direct IO, so that this way the write ends up not
53 # getting compressed, that is, we get a regular extent which is neither
54 # inlined nor compressed.
55 # Alternatively, we could have mounted the fs without compression enabled,
56 # which would result as well in an uncompressed regular extent.
57 sectorsize=$(_scratch_btrfs_sectorsize)
58 $XFS_IO_PROG -f -d -c "pwrite -S 0xab 0 $sectorsize" $SCRATCH_MNT/foobar |\
59 _filter_xfs_io_numbers
61 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
62 $SCRATCH_MNT/mysnap1 > /dev/null
64 # Clone the regular (not inlined) extent.
66 "reflink $SCRATCH_MNT/foobar 0 $((2 * $sectorsize)) $sectorsize" \
67 $SCRATCH_MNT/foobar | _filter_xfs_io_numbers
69 $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
70 $SCRATCH_MNT/mysnap2 > /dev/null
72 $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
73 $SCRATCH_MNT/mysnap1 2>&1 >/dev/null | _filter_scratch
75 # Now do an incremental send of the second snapshot. The send stream can have
76 # a clone operation to clone the extent at offset 0 to offset (2 x sectorsize).
77 # This operation would fail on the receiver if it has compression enabled, since
78 # the write operation of the extent at offset 0 was compressed because it was a
79 # buffered write operation, and btrfs' clone implementation does not allow
80 # cloning inline extents to offsets different from 0.
81 $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
82 $SCRATCH_MNT/mysnap2 2>&1 >/dev/null | _filter_scratch
84 sum_src_snap1=$(md5sum $SCRATCH_MNT/mysnap1/foobar | awk '{print $1}')
85 sum_src_snap2=$(md5sum $SCRATCH_MNT/mysnap2/foobar | awk '{print $1}')
86 echo "File digests in the original filesystem:" >> $seqres.full
87 echo "md5sum $SCRATCH_MNT/mysnap1/foobar " $sum_src_snap1 >> $seqres.full
88 echo "md5sum $SCRATCH_MNT/mysnap2/foobar " $sum_src_snap2 >> $seqres.full
90 # Now recreate the filesystem by receiving both send streams and verify we get
91 # the same file content that the original filesystem had.
93 _scratch_mkfs >>$seqres.full 2>&1
94 _scratch_mount "-o compress"
96 $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
97 $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
99 sum_dest_snap1=$(md5sum $SCRATCH_MNT/mysnap1/foobar | awk '{print $1}')
100 sum_dest_snap2=$(md5sum $SCRATCH_MNT/mysnap2/foobar | awk '{print $1}')
101 echo "File digests in the new filesystem:" | tee -a $seqres.full
102 echo "md5sum $SCRATCH_MNT/mysnap1/foobar " $sum_src_snap1 >> $seqres.full
103 echo "md5sum $SCRATCH_MNT/mysnap2/foobar " $sum_src_snap2 >> $seqres.full
105 [[ $sum_src_snap1 == $sum_dest_snap1 ]] && echo "src and dest 'mysnap1' checksum matched"
106 [[ $sum_src_snap2 == $sum_dest_snap2 ]] && echo "src and dest 'mysnap2' checksum matched"