| #! /bin/bash |
| # FS QA Test No. btrfs/083 |
| # |
| # Test for incremental send where the difference between the parent and child |
| # snapshots is that a directory A was renamed and a directory B was renamed to |
| # the name directory A had before (in the parent snapshot), but directory A's |
| # rename must happen before some other directory C is renamed. |
| # |
| # This issue was fixed by the following linux kernel btrfs patch: |
| # |
| # Btrfs: incremental send, don't rename a directory too soon |
| # |
| #----------------------------------------------------------------------- |
| # 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() |
| { |
| rm -fr $send_files_dir |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _supported_os Linux |
| _require_scratch |
| _require_fssum |
| |
| send_files_dir=$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/a |
| mkdir $SCRATCH_MNT/b |
| mkdir $SCRATCH_MNT/c |
| touch $SCRATCH_MNT/a/file |
| |
| mkdir $SCRATCH_MNT/d |
| mkdir $SCRATCH_MNT/e |
| touch $SCRATCH_MNT/e/file2 |
| mkdir $SCRATCH_MNT/f |
| |
| # Filesystem looks like: |
| # |
| # . (ino 256) |
| # |---- a/ (ino 257) |
| # | |---- file (ino 260) |
| # | |
| # |---- b/ (ino 258) |
| # |---- c/ (ino 259) |
| # |---- d/ (ino 261) |
| # |---- e/ (ino 262) |
| # | |--- file2 (ino 263) |
| # | |
| # |---- f/ (ino 264) |
| # |
| _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1 |
| |
| # Now make inode 257 a child of inode 259 and rename inode 258 to the name that |
| # inode 257 had before. When the incremental send processes inode 257, it can't |
| # do the rename immediately because inode 259 must be renamed first, so inode's |
| # 257 rename is delayed and happens after the rename for inode 259 is done. |
| # Since send processes inodes by ascending order of their number, inode 258 |
| # can't be renamed before inode 257 is renamed and therefore must be delayed |
| # as well. So the send stream must issue rename commands in the following order: |
| # |
| # 1 - rename inode 259 ('c' -> 'x') |
| # 2 - rename inode 257 ('a' -> 'x/y') |
| # 3 - rename inode 258 ('b' -> 'a') |
| # |
| # Before the fix mentioned above, the send stream attempted to rename inode 258 |
| # before inode 257 was renamed, resulting in a client error mentioning |
| # 'directory not empty'. |
| # |
| # Same logic applies to 'd', 'e' and 'f', but the difference is that in the |
| # second snapshot 'e' is associated to an inode with a lower inode number than |
| # in the first snapshot. |
| # |
| mv $SCRATCH_MNT/c $SCRATCH_MNT/x |
| mv $SCRATCH_MNT/a $SCRATCH_MNT/x/y |
| mv $SCRATCH_MNT/b $SCRATCH_MNT/a |
| |
| mv $SCRATCH_MNT/f $SCRATCH_MNT/f2 |
| mv $SCRATCH_MNT/e $SCRATCH_MNT/f2/e2 |
| mv $SCRATCH_MNT/d $SCRATCH_MNT/e |
| |
| # Filesystem now looks like: |
| # |
| # |
| # . (ino 256) |
| # |---- a/ (ino 258) |
| # |---- x/ (ino 259) |
| # | |---- y/ (ino 257) |
| # | |----- file (ino 260) |
| # | |
| # |---- e/ (ino 261) |
| # |---- f2/ (ino 264) |
| # | |----- e2/ (ino 262) |
| # |---- file2 (ino 263) |
| |
| _run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2 |
| |
| run_check $FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| run_check $FSSUM_PROG -A -f -w $send_files_dir/2.fssum \ |
| -x $SCRATCH_MNT/mysnap2/mysnap1 $SCRATCH_MNT/mysnap2 |
| |
| _run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1 |
| _run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \ |
| $SCRATCH_MNT/mysnap2 |
| |
| # Now recreate the filesystem by receiving both send streams and verify we get |
| # the same content that the original filesystem had. |
| _scratch_unmount |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| _run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT |
| run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1 |
| |
| _run_btrfs_util_prog receive -f $send_files_dir/2.snap $SCRATCH_MNT |
| run_check $FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2 |
| |
| echo "Silence is golden" |
| |
| status=0 |
| exit |