#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Filipe Manana.  All Rights Reserved.
#
# FS QA Test No. btrfs/043
#
# Regression test for btrfs incremental send issue where a rmdir instruction
# is sent against an orphan directory inode which is not empty yet, causing
# btrfs receive to fail when it attempts to remove the directory.
#
# This issue is fixed by the following linux kernel btrfs patch:
#
#   Btrfs: fix send attempting to rmdir non-empty directories
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

tmp=`mktemp -d`
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
    rm -fr $tmp
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# real QA test starts here
_supported_fs btrfs
_require_scratch
_require_fssum

rm -f $seqres.full

_scratch_mkfs >/dev/null 2>&1
_scratch_mount

mkdir -p $SCRATCH_MNT/a/b
mkdir $SCRATCH_MNT/0
mkdir $SCRATCH_MNT/1
mkdir $SCRATCH_MNT/a/b/c
mv $SCRATCH_MNT/0 $SCRATCH_MNT/a/b/c
mv $SCRATCH_MNT/1 $SCRATCH_MNT/a/b/c
echo 'ola mundo' > $SCRATCH_MNT/a/b/c/foo.txt
mkdir $SCRATCH_MNT/a/b/c/x
mkdir $SCRATCH_MNT/a/b/c/x2
mkdir $SCRATCH_MNT/a/b/y
mkdir $SCRATCH_MNT/a/b/z
mkdir -p $SCRATCH_MNT/a/b/d1/d2/d3
mkdir $SCRATCH_MNT/a/b/d4

# Filesystem looks like:
#
# .                        (ino 256)
# |-- a/                   (ino 257)
#     |-- b/               (ino 258)
#         |-- c/           (ino 261)
#         |   |-- foo.txt  (ino 262)
#         |   |-- 0/       (ino 259)
#         |   |-- 1/       (ino 260)
#         |   |-- x/       (ino 263)
#         |   |-- x2/      (ino 264)
#         |
#         |-- y/           (ino 265)
#         |-- z/           (ino 266)
#         |-- d1/          (ino 267)
#         |   |-- d2/      (ino 268)
#         |       |-- d3/  (ino 269)
#         |
#         |-- d4/          (ino 270)

_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1

rm -f $SCRATCH_MNT/a/b/c/foo.txt
mv $SCRATCH_MNT/a/b/y $SCRATCH_MNT/a/b/YY
mv $SCRATCH_MNT/a/b/z $SCRATCH_MNT/a
mv $SCRATCH_MNT/a/b/c/x $SCRATCH_MNT/a/b/YY
mv $SCRATCH_MNT/a/b/c/0 $SCRATCH_MNT/a/b/YY/00
mv $SCRATCH_MNT/a/b/c/x2 $SCRATCH_MNT/a/z/X_2
mv $SCRATCH_MNT/a/b/c/1 $SCRATCH_MNT/a/z/X_2
rmdir $SCRATCH_MNT/a/b/c
mv $SCRATCH_MNT/a/b/d4 $SCRATCH_MNT/a/d44
mv $SCRATCH_MNT/a/b/d1/d2 $SCRATCH_MNT/a/d44
rmdir $SCRATCH_MNT/a/b/d1

# Filesystem now looks like:
#
# .                        (ino 256)
# |-- a/                   (ino 257)
#     |-- b/               (ino 258)
#     |   |-- YY/          (ino 265)
#     |        |-- x/      (ino 263)
#     |        |-- 00/     (ino 259)
#     |
#     |-- z/               (ino 266)
#     |   |-- X_2/         (ino 264)
#     |        |-- 1/      (ino 260)
#     |
#     |-- d44/             (ino 270)
#          |-- d2/         (ino 268)
#              |-- d3/     (ino 269)

_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2

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

_run_btrfs_util_prog send -f $tmp/1.snap $SCRATCH_MNT/mysnap1
_run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $tmp/2.snap \
	$SCRATCH_MNT/mysnap2

_check_scratch_fs

_scratch_unmount
_scratch_mkfs >/dev/null 2>&1
_scratch_mount

_run_btrfs_util_prog receive -f $tmp/1.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $tmp/1.fssum $SCRATCH_MNT/mysnap1

_run_btrfs_util_prog receive -f $tmp/2.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $tmp/2.fssum $SCRATCH_MNT/mysnap2

status=0
exit