#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2017 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. btrfs/147
#
# Test that an incremental send/receive operation works correctly after moving
# some directory inode A, renaming a regular file inode B into the old name of
# inode A and finally creating a new hard link for inode B at directory inode A.
#
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
_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/dir1
mkdir $SCRATCH_MNT/dir1/dir2
mkdir $SCRATCH_MNT/dir1/dir2/dir3
mkdir $SCRATCH_MNT/dir5
touch $SCRATCH_MNT/dir1/dir2/dir3/file1
mkdir $SCRATCH_MNT/dir1/dir2/dir3/dir4

# Filesystem looks like:
#
# .                                                      (ino 256)
# |
# |--- dir1/                                             (ino 257)
# |      |--- dir2/                                      (ino 258)
# |             |--- dir3/                               (ino 259)
# |                   |--- file1                         (ino 261)
# |                   |--- dir4/                         (ino 262)
# |
# |--- dir5/                                             (ino 260)
#
$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

mkdir $SCRATCH_MNT/dir1/dir6
mv $SCRATCH_MNT/dir5 $SCRATCH_MNT/dir1/dir2/dir3/dir4/dir55
ln $SCRATCH_MNT/dir1/dir2/dir3/file1 $SCRATCH_MNT/dir1/dir2/dir3/dir4/file11
mv $SCRATCH_MNT/dir1/dir2/dir3/dir4 $SCRATCH_MNT/dir1/dir6/dir44
mv $SCRATCH_MNT/dir1/dir2/dir3/file1 $SCRATCH_MNT/dir1/dir2/dir3/dir4

# Filesystem now looks like:
#
# .                                                      (ino 256)
# |
# |--- dir1/                                             (ino 257)
#        |--- dir2/                                      (ino 258)
#        |      |--- dir3/                               (ino 259)
#        |            |--- dir4                          (ino 261)
#        |
#        |--- dir6/                                      (ino 263)
#               |--- dir44/                              (ino 262)
#                      |--- file11                       (ino 261)
#                      |--- dir55/                       (ino 260)
#
$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT \
		 $SCRATCH_MNT/mysnap2 > /dev/null

$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
		 $SCRATCH_MNT/mysnap2 2>&1 1>/dev/null | _filter_scratch

$FSSUM_PROG -A -f -w $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
$FSSUM_PROG -A -f -w $send_files_dir/2.fssum \
	-x $SCRATCH_MNT/mysnap2/mysnap1 $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

$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT > /dev/null
$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT > /dev/null
$FSSUM_PROG -r $send_files_dir/1.fssum $SCRATCH_MNT/mysnap1
$FSSUM_PROG -r $send_files_dir/2.fssum $SCRATCH_MNT/mysnap2

status=0
exit