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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test No. btrfs/128
#
# Test that, under a particular scenario, an incremental send operation does
# not leak memory (which used to emit a warning in dmesg/syslog).
#
. ./common/preamble
_begin_fstest auto quick send
# Override the default cleanup function.
_cleanup()
{
cd /
rm -fr $send_files_dir
rm -f $tmp.*
}
. ./common/filter
_supported_fs btrfs
_require_test
_require_scratch
_require_fssum
send_files_dir=$TEST_DIR/btrfs-test-$seq
rm -fr $send_files_dir
mkdir $send_files_dir
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
mkdir $SCRATCH_MNT/a
mkdir $SCRATCH_MNT/tmp
mkdir $SCRATCH_MNT/del
mv $SCRATCH_MNT/tmp $SCRATCH_MNT/del
mkdir $SCRATCH_MNT/a/c
mkdir $SCRATCH_MNT/del/x
mkdir $SCRATCH_MNT/del/y
# Filesystem looks like:
#
# . (ino 256)
# |--- a/ (ino 257)
# | |--- c/ (ino 260)
# |
# |--- del/ (ino 259)
# |--- tmp/ (ino 258)
# |--- x/ (ino 261)
# |--- y/ (ino 262)
#
_btrfs subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
# It used to be that when attempting to issue an rmdir operation for inode 259,
# the kernel allocated an orphan_dir_info structure so that later after doing
# the delayed rename operation for inode 258 (which happened once inode 260 was
# renamed) it would check if it could finally issue a rmdir instruction for
# inode 259. If it couldn't, it would not release the previously allocated
# orphan_dir_info structure immediately. Instead it would only release it once
# it finished the send stream and it would emit a warning in dmesg/syslog.
#
mv $SCRATCH_MNT/a/c $SCRATCH_MNT
mv $SCRATCH_MNT/del/x $SCRATCH_MNT/a
mv $SCRATCH_MNT/del/y $SCRATCH_MNT/a
mv $SCRATCH_MNT/del/tmp $SCRATCH_MNT/c
rmdir $SCRATCH_MNT/del
# Filesystem now looks like:
#
# . (ino 256)
# |--- a/ (ino 257)
# | |--- x/ (ino 261)
# | |--- y/ (ino 262)
# |
# |--- c/ (ino 260)
# |--- tmp/ (ino 258)
#
_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 \
$SCRATCH_MNT/mysnap2
# Now recreate the filesystem by receiving both send streams and verify we get
# the same content that the original filesystem had.
_scratch_unmount
_scratch_mkfs >>$seqres.full 2>&1
_scratch_mount
_btrfs 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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