| #! /bin/bash |
| # FS QA Test No. btrfs/133 |
| # |
| # Test that an incremental send operation does not fail when a new inode |
| # replaces an old inode that has the same number but different generation, |
| # and both are direct children of the subvolume/snapshot root. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (C) 2017 Synology Inc. All Rights Reserved. |
| # Author: Robbie Ko <robbieko@synology.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 $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _supported_os Linux |
| _require_test |
| _require_scratch |
| _require_fssum |
| |
| send_files_dir=$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 |
| |
| mkdir $SCRATCH_MNT/a1 |
| mkdir $SCRATCH_MNT/a2 |
| |
| # Filesystem looks like: |
| # |
| # . (ino 256) |
| # |--- a1/ (ino 257) |
| # |--- a2/ (ino 258) |
| # |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \ |
| $SCRATCH_MNT/mysnap1 > /dev/null |
| |
| $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \ |
| $SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch |
| |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| touch $SCRATCH_MNT/a2 |
| |
| # Filesystem now looks like: |
| # |
| # . (ino 256) |
| # |--- a2 (ino 257) |
| # |
| # Notice that at this point inode 257 has a generation with value 7, which is |
| # the generation value for a brand new filesystem. |
| |
| # Now create the second snapshot. This makes the filesystem's current generation |
| # value to increase to the value 8, due to a transaction commit performed by the |
| # snapshot creation ioctl. |
| $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \ |
| $SCRATCH_MNT/mysnap2 > /dev/null |
| |
| # Now receive the first snapshot created in the first filesystem. |
| # Before creating any inodes, the receive command creates the first snapshot, |
| # which causes a transaction commit and therefore bumps the filesystem's current |
| # generation to the value 9. All the inodes created end up getting a generation |
| # value of 9 and the snapshot's root inode (256) gets a generation value of 8. |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null |
| rm $send_files_dir/1.snap |
| |
| $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| $FSSUM_PROG -A -f -w $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2 |
| |
| $BTRFS_UTIL_PROG send -f $send_files_dir/1.snap \ |
| $SCRATCH_MNT/mysnap1 2>&1 1>/dev/null | _filter_scratch |
| $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \ |
| $SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch |
| |
| # Now recreate the filesystem by receiving both send streams and verify we get |
| # the same content that the original filesystem had. |
| # The receive for the second snapshot used to fail because the send stream had |
| # an operation to rename the new inode 257 (generation 7) from its orphan name |
| # to its final name (a2) before the operation to delete (rmdir) the inode 258. |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null |
| $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| $BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null |
| $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2 |
| |
| status=0 |
| exit |