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btrfs: test incremental send with compression and extent cloning
Test that an incremental send/receive operation will not fail when the destination filesystem has compression enabled and the source filesystem has a 4K extent at a file offset 0 that is not compressed and that is shared. This currently fails on btrfs and is fixed by the following patch for the linux kernel: "Btrfs: incremental send, fix emission of invalid clone operations" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Filipe Manana
Eryu Guan
Executable
+113
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#! /bin/bash
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# FS QA Test No. btrfs/149
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#
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# Test that an incremental send/receive operation will not fail when the
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# destination filesystem has compression enabled and the source filesystem
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# has a 4K extent at a file offset 0 that is not compressed and that is
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# shared.
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
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# Author: Filipe Manana <fdmanana@suse.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -fr $send_files_dir
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/reflink
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_scratch_reflink
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_require_odirect
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send_files_dir=$TEST_DIR/btrfs-test-$seq
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rm -f $seqres.full
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rm -fr $send_files_dir
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mkdir $send_files_dir
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount "-o compress"
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# Write to our file using direct IO, so that this way the write ends up not
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# getting compressed, that is, we get a regular extent which is neither
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# inlined nor compressed.
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# Alternatively, we could have mounted the fs without compression enabled,
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# which would result as well in an uncompressed regular extent.
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$XFS_IO_PROG -f -d -c "pwrite -S 0xab 0 4K" $SCRATCH_MNT/foobar | _filter_xfs_io
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
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$SCRATCH_MNT/mysnap1 > /dev/null
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# Clone the regular (not inlined) extent.
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$XFS_IO_PROG -c "reflink $SCRATCH_MNT/foobar 0 8K 4K" $SCRATCH_MNT/foobar \
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| _filter_xfs_io
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
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$SCRATCH_MNT/mysnap2 > /dev/null
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \
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$SCRATCH_MNT/mysnap1 2>&1 >/dev/null | _filter_scratch
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# Now do an incremental send of the second snapshot. The send stream can have
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# a clone operation to clone the extent at offset 0 to offset 8K. This operation
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# would fail on the receiver if it has compression enabled, since the write
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# operation of the extent at offset 0 was compressed because it was a buffered
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# write operation, and btrfs' clone implementation does not allow cloning inline
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# extents to offsets different from 0.
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$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
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$SCRATCH_MNT/mysnap2 2>&1 >/dev/null | _filter_scratch
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echo "File digests in the original filesystem:"
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md5sum $SCRATCH_MNT/mysnap1/foobar | _filter_scratch
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md5sum $SCRATCH_MNT/mysnap2/foobar | _filter_scratch
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same file content that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount "-o compress"
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$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
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$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
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echo "File digests in the new filesystem:"
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md5sum $SCRATCH_MNT/mysnap1/foobar | _filter_scratch
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md5sum $SCRATCH_MNT/mysnap2/foobar | _filter_scratch
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status=0
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exit
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@@ -0,0 +1,14 @@
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QA output created by 149
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wrote 4096/4096 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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linked 4096/4096 bytes at offset 8192
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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At subvol SCRATCH_MNT/mysnap1
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At subvol SCRATCH_MNT/mysnap2
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File digests in the original filesystem:
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1696b8fe138e867797eb6683cf13d99c SCRATCH_MNT/mysnap1/foobar
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28feb14349a6f6c67a11967278ed7359 SCRATCH_MNT/mysnap2/foobar
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At subvol mysnap1
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File digests in the new filesystem:
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1696b8fe138e867797eb6683cf13d99c SCRATCH_MNT/mysnap1/foobar
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28feb14349a6f6c67a11967278ed7359 SCRATCH_MNT/mysnap2/foobar
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@@ -151,3 +151,4 @@
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146 auto quick
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147 auto quick send
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148 auto quick rw
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149 auto quick send compress
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