#! /bin/bash # SPDX-License-Identifier: GPL-2.0 # Copyright (c) 2015 Fujitsu. All Rights Reserved. # # FS QA Test 099 # # Check for qgroup reserved space leaks caused by re-writing dirty ranges # This bug has been present in btrfs qgroup for a long time # . ./common/preamble _begin_fstest auto quick qgroup limit . ./common/filter _supported_fs btrfs _require_scratch _require_btrfs_qgroup_report # Use big blocksize to ensure there is still enough space left for metadata # space reserve. BLOCKSIZE=$(( 2 * 1024 * 1024 )) # 2M block size FILESIZE=$(( 128 * 1024 * 1024 )) # 128M file size _scratch_mkfs >> $seqres.full 2>&1 _scratch_mount _require_fs_space $SCRATCH_MNT $(($FILESIZE * 2 / 1024)) _btrfs quota enable $SCRATCH_MNT _btrfs qgroup limit $FILESIZE 0/5 $SCRATCH_MNT # loop 5 times without sync to ensure reserved space leak will happen for i in `seq 1 5`; do # Use 1/4 of the file size, to ensure even commit is trigger by # dirty page threshold or commit interval, we should still be # able to continue write $XFS_IO_PROG -f -c "pwrite -b $BLOCKSIZE 0 $(($FILESIZE / 4))" \ $SCRATCH_MNT/foo | _filter_xfs_io done # Sync to make sure all the dirty pages are written to disk, which should # free all the reserved space sync # remove the file and sync, to ensure all quota space freed rm $SCRATCH_MNT/foo sync # We should be able to write $FILESIZE - $BLOCKSIZE data now $XFS_IO_PROG -f -c "pwrite -b $BLOCKSIZE 0 $(($FILESIZE - $BLOCKSIZE))" \ $SCRATCH_MNT/foo | _filter_xfs_io # success, all done status=0 exit