| #! /bin/bash |
| # FS QA Test 464 |
| # |
| # Run delalloc writes & append writes & non-data-integrity syncs concurrently |
| # to test the race between block map change vs writeback. |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2017 Red Hat Inc. All Rights Reserved. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation. |
| # |
| # This program is distributed in the hope that it would be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| #----------------------------------------------------------------------- |
| # |
| |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| |
| here=`pwd` |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| cd / |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| MAXFILES=200 |
| BLOCK_SZ=65536 |
| |
| LOOP_CNT=10 |
| LOOP_TIME=5 |
| PROC_CNT=16 |
| |
| stop=$tmp.stop |
| |
| # get a random file to work on |
| getfile() |
| { |
| echo $SCRATCH_MNT/$((RANDOM % MAXFILES)) |
| } |
| |
| # delalloc write a relative big file to get enough dirty pages to be written |
| # back, and XFS needs big enough file to trigger speculative preallocations, so |
| # freeing these eofblocks could change the extent record |
| do_write() |
| { |
| local blockcount=$((RANDOM % 100)) |
| local filesize=$((blockcount * BLOCK_SZ)) |
| $XFS_IO_PROG -ftc "pwrite -b $BLOCK_SZ 0 $filesize" `getfile` \ |
| >/dev/null 2>&1 |
| } |
| |
| # append another dirty page to the file, the writeback might pick it up too if |
| # the file is already under writeback |
| do_append() |
| { |
| echo "test string" >> `getfile` |
| } |
| |
| # issue WB_SYNC_NONE writeback with the '-w' option of sync_range xfs_io |
| # command, so that the last dirty page from append write can be picked up in |
| # this writeback cycle. This is not mandatory but could help reproduce XFS |
| # corruption more easily. |
| do_writeback() |
| { |
| $XFS_IO_PROG -c "sync_range -w 0 0" `getfile` >/dev/null 2>&1 |
| } |
| |
| # remove previous $seqres.full before test |
| rm -f $seqres.full |
| |
| # real QA test starts here |
| _supported_fs generic |
| _supported_os Linux |
| # do fsck after each iteration in test |
| _require_scratch_nocheck |
| _require_xfs_io_command "sync_range" |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _scratch_mount |
| |
| # loop for $LOOP_CNT iterations, and each iteration starts $PROC_CNT processes |
| # for each operation and runs for $LOOP_TIME seconds, and check filesystem |
| # consistency after each iteration |
| for i in `seq 1 $LOOP_CNT`; do |
| rm -f $stop |
| for j in `seq 1 $PROC_CNT`; do |
| while [ ! -e $stop ]; do |
| do_write |
| done & |
| |
| while [ ! -e $stop ]; do |
| do_append |
| done & |
| |
| while [ ! -e $stop ]; do |
| do_writeback |
| done & |
| done |
| sleep $LOOP_TIME |
| touch $stop |
| wait |
| |
| _scratch_unmount |
| # test exits here if fs is inconsistent |
| _check_scratch_fs |
| _scratch_mount |
| done |
| |
| echo "Silence is golden" |
| |
| # success, all done |
| status=0 |
| exit |