usr/src/test/zfs-tests/tests/functional/cli_root/zpool_import/import_cachefile_device_replaced.ksh

   1 #!/usr/bin/ksh -p
   2
   3 #
   4 # This file and its contents are supplied under the terms of the
   5 # Common Development and Distribution License ("CDDL"), version 1.0.
   6 # You may only use this file in accordance with the terms of version
   7 # 1.0 of the CDDL.
   8 #
   9 # A full copy of the text of the CDDL should have accompanied this
  10 # source.  A copy of the CDDL is also available via the Internet at
  11 # http://www.illumos.org/license/CDDL.
  12 #
  13
  14 #
  15 # Copyright (c) 2016 by Delphix. All rights reserved.
  16 #
  17
  18 . $STF_SUITE/tests/functional/cli_root/zpool_import/zpool_import.kshlib
  19
  20 #
  21 # DESCRIPTION:
  22 #       A pool should be importable using an outdated cachefile that is unaware
  23 #       of a zpool replace operation at different stages in time.
  24 #
  25 # STRATEGY:
  26 #       1. Create a pool with some devices and an alternate cachefile.
  27 #       2. Backup the cachefile.
  28 #       3. Initiate device replacement, backup cachefile again and export pool.
  29 #          Special care must be taken so that resilvering doesn't complete
  30 #          before we exported the pool.
  31 #       4. Verify that we can import the pool using the first cachefile backup.
  32 #          (Test 1. cachefile: pre-replace, pool: resilvering)
  33 #       5. Wait for the resilvering to finish and export the pool.
  34 #       6. Verify that we can import the pool using the first cachefile backup.
  35 #          (Test 2. cachefile: pre-replace, pool: post-replace)
  36 #       7. Export the pool.
  37 #       8. Verify that we can import the pool using the second cachefile backup.
  38 #          (Test 3. cachefile: resilvering, pool: post-replace)
  39 #
  40 # STRATEGY TO SLOW DOWN RESILVERING:
  41 #       1. Reduce zfs_txg_timeout, which controls how long can we resilver for
  42 #          each sync.
  43 #       2. Add data to pool
  44 #       3. Re-import the pool so that data isn't cached
  45 #       4. Use zinject to slow down device I/O
  46 #       5. Trigger the resilvering
  47 #       6. Use spa freeze to stop writing to the pool.
  48 #       7. Clear zinject events (needed to export the pool)
  49 #       8. Export the pool
  50 #
  51
  52 verify_runnable "global"
  53
  54 ZFS_TXG_TIMEOUT=""
  55
  56 function custom_cleanup
  57 {
  58         # Revert zfs_txg_timeout to defaults
  59         [[ -n ZFS_TXG_TIMEOUT ]] &&
  60             log_must set_zfs_txg_timeout $ZFS_TXG_TIMEOUT
  61
  62         cleanup
  63 }
  64
  65 log_onexit custom_cleanup
  66
  67 function test_replacing_vdevs
  68 {
  69         typeset poolcreate="$1"
  70         typeset replacevdev="$2"
  71         typeset replaceby="$3"
  72         typeset poolfinalstate="$4"
  73         typeset zinjectdevices="$5"
  74         typeset earlyremove="$6"
  75
  76         log_note "$0: pool '$poolcreate', replace $replacevdev by $replaceby."
  77
  78         log_must zpool create -o cachefile=$CPATH $TESTPOOL1 $poolcreate
  79
  80         # Cachefile: pool in pre-replace state
  81         log_must cp $CPATH $CPATHBKP
  82
  83         # Steps to insure resilvering happens very slowly.
  84         log_must write_some_data $TESTPOOL1
  85         log_must zpool export $TESTPOOL1
  86         log_must cp $CPATHBKP $CPATH
  87         log_must zpool import -c $CPATH -o cachefile=$CPATH $TESTPOOL1
  88         typeset device
  89         for device in $zinjectdevices ; do
  90                 log_must zinject -d $device -D 200:1 $TESTPOOL1 > /dev/null
  91         done
  92         log_must zpool replace $TESTPOOL1 $replacevdev $replaceby
  93
  94         # Cachefile: pool in resilvering state
  95         log_must cp $CPATH $CPATHBKP2
  96
  97         # We must disable zinject in order to export the pool, so we freeze
  98         # it first to prevent writing out subsequent resilvering progress.
  99         log_must zpool freeze $TESTPOOL1
 100         # Confirm pool is still replacing
 101         log_must pool_is_replacing $TESTPOOL1
 102         log_must zinject -c all > /dev/null
 103         log_must zpool export $TESTPOOL1
 104
 105         ( $earlyremove ) && log_must rm $replacevdev
 106
 107         ############################################################
 108         # Test 1. Cachefile: pre-replace, pool: resilvering
 109         ############################################################
 110         log_must cp $CPATHBKP $CPATH
 111         log_must zpool import -c $CPATH $TESTPOOL1
 112
 113         # Wait for resilvering to finish
 114         log_must wait_for_pool_config $TESTPOOL1 "$poolfinalstate"
 115         log_must zpool export $TESTPOOL1
 116
 117         ( ! $earlyremove ) && log_must rm $replacevdev
 118
 119         ############################################################
 120         # Test 2. Cachefile: pre-replace, pool: post-replace
 121         ############################################################
 122         log_must zpool import -c $CPATHBKP $TESTPOOL1
 123         log_must check_pool_config $TESTPOOL1 "$poolfinalstate"
 124         log_must zpool export $TESTPOOL1
 125
 126         ############################################################
 127         # Test 3. Cachefile: resilvering, pool: post-replace
 128         ############################################################
 129         log_must zpool import -c $CPATHBKP2 $TESTPOOL1
 130         log_must check_pool_config $TESTPOOL1 "$poolfinalstate"
 131
 132         # Cleanup
 133         log_must zpool destroy $TESTPOOL1
 134         log_must rm -f $CPATH $CPATHBKP $CPATHBKP2
 135         log_must mkfile $FILE_SIZE $replacevdev
 136
 137         log_note ""
 138 }
 139
 140 # We set zfs_txg_timeout to 1 to reduce resilvering time at each sync.
 141 ZFS_TXG_TIMEOUT=$(get_zfs_txg_timeout)
 142 set_zfs_txg_timeout 1
 143
 144 test_replacing_vdevs "$VDEV0 $VDEV1" \
 145     "$VDEV1" "$VDEV2" \
 146     "$VDEV0 $VDEV2" \
 147     "$VDEV0 $VDEV1" \
 148     false
 149
 150 test_replacing_vdevs "mirror $VDEV0 $VDEV1" \
 151         "$VDEV1" "$VDEV2" \
 152         "mirror $VDEV0 $VDEV2" \
 153         "$VDEV0 $VDEV1" \
 154         true
 155
 156 test_replacing_vdevs "raidz $VDEV0 $VDEV1 $VDEV2" \
 157         "$VDEV1" "$VDEV3" \
 158         "raidz $VDEV0 $VDEV3 $VDEV2" \
 159         "$VDEV0 $VDEV1 $VDEV2" \
 160         true
 161
 162 set_zfs_txg_timeout $ZFS_TXG_TIMEOUT
 163
 164 log_pass "zpool import -c cachefile_unaware_of_replace passed."