| #! /bin/bash |
| # FS QA Test No. btrfs/109 |
| # |
| # Test that a send operation works correctly with reflinked files (cloned |
| # extents which multiple files point to) that have compressed extents. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved. |
| # Author: Filipe Manana <fdmanana@suse.com> |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| # |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -fr $send_files_dir |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/reflink |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _supported_os Linux |
| _require_scratch |
| _require_cp_reflink |
| |
| send_files_dir=$TEST_DIR/btrfs-test-$seq |
| |
| rm -f $seqres.full |
| rm -fr $send_files_dir |
| mkdir $send_files_dir |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount "-o compress" |
| |
| # Create our file with an extent of 100K starting at file offset 0K. |
| $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 100K" \ |
| -c "fsync" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Rewrite part of the previous extent (its first 40K) and write a new 100K |
| # extent starting at file offset 100K. |
| $XFS_IO_PROG -c "pwrite -S 0xbb 0K 40K" \ |
| -c "pwrite -S 0xcc 100K 100K" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Our file foo now has 3 file extent items in its metadata: |
| # |
| # 1) One covering the file range 0 to 40K; |
| # 2) One covering the file range 40K to 100K, which points to the first extent |
| # we wrote to the file and has a data offset field with value 40K (our file |
| # no longer uses the first 40K of data from that extent); |
| # 3) One covering the file range 100K to 200K. |
| |
| # Now clone our file foo into file bar. |
| cp --reflink=always $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Create our snapshot for the send operation. |
| _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/snap |
| |
| echo "File digests in the original filesystem:" |
| md5sum $SCRATCH_MNT/snap/foo | _filter_scratch |
| md5sum $SCRATCH_MNT/snap/bar | _filter_scratch |
| |
| _run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/snap |
| |
| # Now recreate the filesystem by receiving the send stream and verify we get |
| # the same file contents that the original filesystem had. |
| # Btrfs send used to issue a clone operation from foo's range [80K, 140K[ to |
| # bar's range [40K, 100K[ when cloning the extent pointed to by foo's second |
| # file extent item, this was incorrect because of bad accounting of the file |
| # extent item's data offset field. The correct range to clone from should have |
| # been [40K, 100K[. |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount "-o compress" |
| |
| _run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT |
| |
| echo "File digests in the new filesystem:" |
| # Must match the digests we got in the original filesystem. |
| md5sum $SCRATCH_MNT/snap/foo | _filter_scratch |
| md5sum $SCRATCH_MNT/snap/bar | _filter_scratch |
| |
| status=0 |
| exit |