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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Filipe Manana. All Rights Reserved.
#
# FS QA Test No. btrfs/040
#
# Regression test for btrfs incremental send issue where an rmdir
# instruction was sent multiple times for the same target directory.
# The number of times depended on the number of hardlinks against
# the same inode inside the target directory. That inode must have
# had the highest number of all the inodes that were children of the
# directory. This made the btrfs receive command fail immediately once
# it received the second rmdir instruction.
#
# This issue is fixed by the following linux kernel btrfs patch:
#
# Btrfs: send, don't send rmdir for same target multiple times
#
. ./common/preamble
_begin_fstest auto quick send
tmp=`mktemp -d`
# Override the default cleanup function.
_cleanup()
{
rm -fr $tmp
}
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs btrfs
_require_scratch
_require_fssum
_scratch_mkfs >/dev/null 2>&1
_scratch_mount
mkdir -p $SCRATCH_MNT/a/b/c
echo 'hello world' > $SCRATCH_MNT/a/b/c/hel.txt
echo 'ola mundo' > $SCRATCH_MNT/a/b/c/foo.txt
ln $SCRATCH_MNT/a/b/c/foo.txt $SCRATCH_MNT/a/b/c/bar.txt
ln $SCRATCH_MNT/a/b/c/foo.txt $SCRATCH_MNT/a/b/baz.txt
# Filesystem looks like:
#
# . (ino 256)
# |-- a/ (ino 257)
# |-- b/ (ino 258)
# |-- c/ (ino 259)
# | |-- hel.txt (ino 260)
# | |-- foo.txt (ino 261)
# | |-- bar.txt (ino 261)
# |
# |-- baz.txt (ino 261)
_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
rm -f $SCRATCH_MNT/a/b/c/foo.txt
rm -f $SCRATCH_MNT/a/b/c/bar.txt
rm -f $SCRATCH_MNT/a/b/c/hel.txt
rmdir $SCRATCH_MNT/a/b/c
# Filesystem now looks like:
#
# . (ino 256)
# |-- a/ (ino 257)
# |-- b/ (ino 258)
# |-- baz.txt (ino 261)
_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
_scratch_unmount
_check_btrfs_filesystem $SCRATCH_DEV
_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 2>> $seqres.full
_run_btrfs_util_prog receive -f $tmp/2.snap $SCRATCH_MNT
run_check $FSSUM_PROG -r $tmp/2.fssum $SCRATCH_MNT/mysnap2 2>> $seqres.full
_scratch_unmount
_check_btrfs_filesystem $SCRATCH_DEV
status=0
exit
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