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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2014 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. btrfs/077
#
# Regression test for a btrfs incremental send issue.
# If between two snapshots we rename an existing directory named X to Y and
# make it a child (direct or not) of a new inode named X, we were delaying
# the move/rename of the former directory unnecessarily, which would result
# in attempting to rename the new directory from its orphan name to name X
# prematurely. This made btrfs receive fail with an error message like the
# following:
#
# rename o261-7-0 -> merlin/RC/OSD failed
#
# This issue was a regression in the 3.16 kernel and got fixed by the following
# linux kernel btrfs patch:
#
# Btrfs: send, don't delay dir move if there's a new parent inode
#
. ./common/preamble
_begin_fstest auto quick send snapshot
tmp=`mktemp -d`
# Override the default cleanup function.
_cleanup()
{
rm -fr $send_files_dir
rm -fr $tmp
}
. ./common/filter
_supported_fs btrfs
_require_scratch
_require_fssum
send_files_dir=$TEST_DIR/btrfs-test-$seq
rm -fr $send_files_dir
mkdir $send_files_dir
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
mkdir -p $SCRATCH_MNT/merlin/RC/OSD/Source
mkdir -p $SCRATCH_MNT/fdm/RCz/OSDz/Sourcez
mkdir -p $SCRATCH_MNT/Z/Z2
# Filesystem looks like:
#
# . (ino 256)
# |---- merlin/ (ino 257)
# | |---- RC/ (ino 258)
# | |----- OSD/ (ino 259)
# | |---- Source/ (ino 260)
# |
# |---- fdm/ (ino 261)
# | |---- RCz/ (ino 262)
# | |----- OSDz/ (ino 263)
# | |---- Sourcez/ (ino 264)
# |
# |---- Z/ (ino 265)
# |---- Z2/ (ino 266)
#
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
mkdir $SCRATCH_MNT/OSD
mv $SCRATCH_MNT/merlin/RC/OSD $SCRATCH_MNT/OSD/OSD-Plane_788
mv $SCRATCH_MNT/OSD $SCRATCH_MNT/merlin/RC
mkdir $SCRATCH_MNT/OSDz
mv $SCRATCH_MNT/Z/Z2 $SCRATCH_MNT/OSDz/xz2
mv $SCRATCH_MNT/Z $SCRATCH_MNT/OSDz/xz2/xz
mv $SCRATCH_MNT/fdm/RCz/OSDz $SCRATCH_MNT/OSDz/xz2/xz/OSD-Plane_788z
mv $SCRATCH_MNT/OSDz $SCRATCH_MNT/fdm/RCz
# Filesystem now looks like:
#
#
# . (ino 256)
# |---- merlin/ (ino 257)
# | |---- RC/ (ino 258)
# | |----- OSD/ (ino 267) (new)
# | |---- OSD-Plane_788/ (ino 259)
# | |---- Source/ (ino 260)
# |
# |---- fdm/ (ino 261)
# |---- RCz/ (ino 262)
# |----- OSDz/ (ino 268) (new)
# |--- xz2/ (ino 266)
# |---- xz/ (ino 265)
# |---- OSD-Plane_788z/ (ino 263)
# |---- Sourcez/ (ino 264)
#
_btrfs 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
_btrfs send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
_btrfs send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
$SCRATCH_MNT/mysnap2
_check_scratch_fs
_scratch_unmount
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
_btrfs receive -f $send_files_dir/1.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
_btrfs 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
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