| #!/bin/ksh -p |
| # |
| # CDDL HEADER START |
| # |
| # The contents of this file are subject to the terms of the |
| # Common Development and Distribution License (the "License"). |
| # You may not use this file except in compliance with the License. |
| # |
| # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| # or http://www.opensolaris.org/os/licensing. |
| # See the License for the specific language governing permissions |
| # and limitations under the License. |
| # |
| # When distributing Covered Code, include this CDDL HEADER in each |
| # file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| # If applicable, add the following below this CDDL HEADER, with the |
| # fields enclosed by brackets "[]" replaced with your own identifying |
| # information: Portions Copyright [yyyy] [name of copyright owner] |
| # |
| # CDDL HEADER END |
| # |
| |
| # |
| # Copyright (c) 2017 by Lawrence Livermore National Security, LLC. |
| # Use is subject to license terms. |
| # |
| |
| # DESCRIPTION: |
| # Verify zio deadman detects a hung zio |
| # |
| # STRATEGY: |
| # 1. Reduce the zfs_deadman_ziotime_ms to 5s. |
| # 2. Reduce the zfs_deadman_checktime_ms to 1s. |
| # 3. Inject a 10s zio delay to force long IOs. |
| # 4. Read an uncached file in the background. |
| # 5. Verify a "deadman" event is posted. |
| # 6. Inject a 100ms zio delay which is under the 5s allowed. |
| # 7. Read an uncached file in the background. |
| # 8. Verify a "deadman" event is not posted. |
| # |
| |
| . $STF_SUITE/include/libtest.shlib |
| . $STF_SUITE/tests/functional/deadman/deadman.cfg |
| |
| verify_runnable "both" |
| |
| function cleanup |
| { |
| log_must zinject -c all |
| default_cleanup_noexit |
| |
| log_must set_tunable64 zfs_deadman_ziotime_ms $ZIOTIME_DEFAULT |
| log_must set_tunable64 zfs_deadman_checktime_ms $CHECKTIME_DEFAULT |
| log_must set_tunable64 zfs_deadman_failmode $FAILMODE_DEFAULT |
| } |
| |
| log_assert "Verify zio deadman detects a hung zio" |
| log_onexit cleanup |
| |
| # 1. Reduce the zfs_deadman_ziotime_ms to 5s. |
| log_must set_tunable64 zfs_deadman_ziotime_ms 5000 |
| # 2. Reduce the zfs_deadman_checktime_ms to 1s. |
| log_must set_tunable64 zfs_deadman_checktime_ms 1000 |
| log_must set_tunable64 zfs_deadman_failmode "wait" |
| |
| # Create a new pool in order to use the updated deadman settings. |
| default_setup_noexit $DISK1 |
| |
| # Write a file and export/import the pool to clear the ARC. |
| mntpnt=$(get_prop mountpoint $TESTPOOL/$TESTFS) |
| log_must file_write -b 1048576 -c 8 -o create -d 0 -f $mntpnt/file1 |
| log_must file_write -b 1048576 -c 8 -o create -d 0 -f $mntpnt/file2 |
| log_must zpool export $TESTPOOL |
| log_must zpool import $TESTPOOL |
| log_must stat -t /$mntpnt/file1 |
| log_must stat -t /$mntpnt/file2 |
| |
| # 3. Inject a 10s zio delay to force long IOs and serialize them.. |
| log_must zpool events -c |
| log_must zinject -d $DISK1 -D10000:1 $TESTPOOL |
| |
| # 4. Read an uncached file in the background, it's expected to hang. |
| log_must eval "dd if=/$mntpnt/file1 of=/dev/null bs=1048576 &" |
| sleep 10 |
| log_must zinject -c all |
| log_must zpool sync |
| wait |
| |
| # 5. Verify a "deadman" event is posted. The first appears after 5 |
| # seconds, and another each second thereafter until the delay is cleared. |
| events=$(zpool events | grep -c ereport.fs.zfs.deadman) |
| if [ "$events" -lt 1 ]; then |
| log_fail "Expect >=1 deadman events, $events found" |
| fi |
| |
| # 6. Inject a 100ms zio delay which is under the 5s allowed, allow them |
| # to run concurrently so they don't get starved in the queue. |
| log_must zpool events -c |
| log_must zinject -d $DISK1 -D100:10 $TESTPOOL |
| |
| # 7. Read an uncached file in the background. |
| log_must eval "dd if=/$mntpnt/file2 of=/dev/null bs=1048576 &" |
| sleep 10 |
| log_must zinject -c all |
| wait |
| |
| # 8. Verify a "deadman" event is not posted. |
| events=$(zpool events | grep -c ereport.fs.zfs.deadman) |
| if [ "$events" -ne 0 ]; then |
| log_fail "Expect 0 deadman events, $events found" |
| fi |
| |
| log_pass "Verify zio deadman detected a hung zio and $events deadman events" |