tests/zfs-tests/tests/functional/mmp/mmp_write_uberblocks.ksh

   1 #!/bin/ksh -p
   2 #
   3 # CDDL HEADER START
   4 #
   5 # This file and its contents are supplied under the terms of the
   6 # Common Development and Distribution License ("CDDL"), version 1.0.
   7 # You may only use this file in accordance with the terms of version
   8 # 1.0 of the CDDL.
   9 #
  10 # A full copy of the text of the CDDL should have accompanied this
  11 # source.  A copy of the CDDL is also available via the Internet at
  12 # http://www.illumos.org/license/CDDL.
  13 #
  14 # CDDL HEADER END
  15 #
  16
  17 #
  18 # Copyright (c) 2017 by Lawrence Livermore National Security, LLC.
  19 #
  20
  21 # DESCRIPTION:
  22 #       Verify MMP behaves correctly when failing to write uberblocks.
  23 #
  24 # STRATEGY:
  25 #       1. Create a mirrored pool and enable multihost
  26 #       2. Inject a 50% failure rate when writing uberblocks to a device
  27 #       3. Delay briefly for additional MMP writes to complete
  28 #       4. Verify the failed uberblock writes did not prevent MMP updates
  29 #
  30
  31 . $STF_SUITE/include/libtest.shlib
  32 . $STF_SUITE/tests/functional/mmp/mmp.cfg
  33 . $STF_SUITE/tests/functional/mmp/mmp.kshlib
  34
  35 verify_runnable "both"
  36
  37 function cleanup
  38 {
  39         zinject -c all
  40         default_cleanup_noexit
  41         log_must mmp_clear_hostid
  42 }
  43
  44 log_assert "mmp behaves correctly when failing to write uberblocks."
  45 log_onexit cleanup
  46
  47 log_must mmp_set_hostid $HOSTID1
  48 default_mirror_setup_noexit $DISKS
  49 log_must zpool set multihost=on $TESTPOOL
  50 log_must zinject -d ${DISK[0]} -e io -T write -f 50 $TESTPOOL -L uber
  51 clear_mmp_history
  52 uber_count=$(count_mmp_writes $TESTPOOL 3)
  53
  54 if [ $uber_count -eq 0 ]; then
  55         log_fail "mmp writes did not occur when uberblock IO errors injected"
  56 fi
  57
  58 log_pass "mmp correctly wrote uberblocks when IO errors injected"