| #! /bin/bash |
| # SPDX-License-Identifier: GPL-2.0+ |
| # Copyright (c) 2019 Oracle, Inc. All Rights Reserved. |
| # |
| # FS QA Test No. 501 |
| # |
| # Stress test creating a lot of unlinked O_TMPFILE files and recovering them |
| # after a crash, checking that we don't blow up the filesystem. This is sort |
| # of a performance test for the xfs unlinked inode backref patchset. |
| # |
| # Here we force the use of the slow iunlink bucket walk code in a single |
| # threaded situation. |
| # |
| seq=`basename $0` |
| seqres=$RESULT_DIR/$seq |
| echo "QA output created by $seq" |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| testfile=$TEST_DIR/$seq.txt |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| delay_knob="/sys/fs/xfs/debug/log_recovery_delay" |
| |
| _cleanup() |
| { |
| cd / |
| test -e "$delay_knob" && echo 0 > "$delay_knob" |
| rm -f $tmp.* |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/inject |
| |
| # real QA test starts here |
| _supported_fs xfs |
| _require_xfs_io_error_injection "iunlink_fallback" |
| _require_xfs_sysfs debug/log_recovery_delay |
| _require_scratch |
| _require_test_program "t_open_tmpfiles" |
| |
| rm -f $seqres.full |
| _scratch_mkfs >> $seqres.full 2>&1 |
| _scratch_mount |
| |
| # Set ULIMIT_NOFILE to min(file-max / 2, 30000 files per LOAD_FACTOR) |
| # so that this test doesn't take forever or OOM the box |
| max_files=$((30000 * LOAD_FACTOR)) |
| max_allowable_files=$(( $(cat /proc/sys/fs/file-max) / 2 )) |
| test $max_allowable_files -gt 0 && test $max_files -gt $max_allowable_files && \ |
| max_files=$max_allowable_files |
| ulimit -n $max_files |
| |
| # Open a lot of unlinked files |
| echo create >> $seqres.full |
| $here/src/t_open_tmpfiles $SCRATCH_MNT $(_scratch_shutdown_handle) >> $seqres.full |
| |
| # Unmount to prove that we can clean it all |
| echo umount >> $seqres.full |
| before=$(date +%s) |
| _scratch_unmount |
| after=$(date +%s) |
| echo "Unmount took $((after - before))s." >> $seqres.full |
| |
| # Force xfs to use the iunlinked fallback 50% of the time |
| injector() { |
| # Slow down log recovery by 5s to give us enough time to set up |
| # error injection. |
| echo 5 > "$delay_knob" |
| |
| # Try for 10s to set our knob. |
| knob="$(_find_xfs_mountdev_errortag_knob "${SCRATCH_DEV}" iunlink_fallback)" |
| nr=0 |
| while [ ! -e "$knob" ] && [ "$nr" -lt 20 ]; do |
| sleep 0.5 |
| nr=$((nr+1)) |
| done |
| if [ -e "$knob" ]; then |
| echo 2 > "$knob" |
| else |
| echo "unable to set iunlink_fallback?" |
| fi |
| } |
| |
| # Mount so that we can run the usual checks |
| echo silence is golden |
| injector & |
| _scratch_mount |
| status=0 |
| exit |