tests/zfs-tests/tests/functional/cli_root/zdb/zdb_004_pos.ksh

   1 #!/bin/ksh
   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) 2017 by Lawrence Livermore National Security, LLC.
  16 #
  17
  18 . $STF_SUITE/include/libtest.shlib
  19
  20 #
  21 # Description:
  22 # zdb will not produce redundant dumps of uberblocks
  23 #
  24 # Strategy:
  25 # 1. Create a pool with two vdevs, A and B
  26 # 2. Offline vdev A
  27 # 3. Do some I/O
  28 # 4. Export the pool
  29 # 5. Copy label 1 from vdev A to vdev B
  30 # 6. Collect zdb -lu output for vdev B
  31 # 7. Verify labels 0 and 1 have unique Uberblocks, but 2 and 3 have none
  32 #
  33
  34 log_assert "Verify zdb produces unique dumps of uberblocks"
  35 log_onexit cleanup
  36
  37 function cleanup
  38 {
  39         datasetexists $TESTPOOL && destroy_pool $TESTPOOL
  40         for DISK in $DISKS; do
  41                 zpool labelclear -f $DEV_RDSKDIR/$DISK
  42         done
  43         if is_freebsd ; then
  44                 log_must sysctl kern.geom.debugflags=$saved_debugflags
  45         fi
  46 }
  47
  48 if is_freebsd ; then
  49         # FreeBSD won't allow writing to an in-use device without this set
  50         saved_debugflags=$(sysctl -n kern.geom.debugflags)
  51         log_must sysctl kern.geom.debugflags=16
  52 fi
  53
  54 verify_runnable "global"
  55 verify_disk_count "$DISKS" 2
  56 set -A DISK $DISKS
  57 if is_freebsd ; then
  58         WHOLE_DISK=/dev/${DISK[0]}
  59 else
  60         WHOLE_DISK=${DISK[0]}
  61 fi
  62
  63 default_mirror_setup_noexit $DISKS
  64 DEVS=$(get_pool_devices ${TESTPOOL} ${DEV_RDSKDIR})
  65 [[ -n $DEVS ]] && set -A DISK $DEVS
  66
  67 log_must zpool offline $TESTPOOL ${WHOLE_DISK}
  68 log_must dd if=/dev/urandom of=$TESTDIR/testfile bs=1K count=2
  69 log_must zpool export $TESTPOOL
  70
  71 log_must dd if=$DEV_RDSKDIR/${DISK[0]} of=$DEV_RDSKDIR/${DISK[1]} bs=1K count=256 conv=notrunc
  72
  73 if is_freebsd; then
  74         DISK1="/dev/${DISK[1]}"
  75 else
  76         DISK1="${DISK[1]}"
  77 fi
  78
  79 ubs=$(zdb -lu ${DISK1} | grep -e LABEL -e Uberblock -e 'labels = ')
  80 log_note "vdev 1: ubs $ubs"
  81
  82 ub_dump_counts=$(zdb -lu ${DISK1} | \
  83         awk '   /LABEL/ {label=$NF; blocks[label]=0};
  84                 /Uberblock/ {blocks[label]++};
  85                 END {print blocks[0],blocks[1],blocks[2],blocks[3]}')
  86 (( $? != 0)) && log_fail "failed to get ub_dump_counts from DISK[1]"
  87 log_note "vdev 1: ub_dump_counts $ub_dump_counts"
  88
  89 set -A dump_count $ub_dump_counts
  90 for label in 0 1 2 3; do
  91         if [[ $label -lt 2 ]]; then
  92                 [[ ${dump_count[$label]} -eq 0 ]] && \
  93                     log_fail "zdb incorrectly dumps duplicate uberblocks"
  94         else
  95                 [[ ${dump_count[$label]} -ne 0 ]] && \
  96                     log_fail "zdb incorrectly dumps duplicate uberblocks"
  97         fi
  98 done
  99
 100 cleanup
 101
 102 log_pass "zdb produces unique dumps of uberblocks"