scripts/zpool-config/lo-faulty-raid10.sh

   1 #!/bin/bash
   2 #
   3 # 4 loopback devices using the md faulty level for easy
   4 # fault injection on top of which is layered raid10 (mirrored).
   5 #
   6 #     zpool-vdev0    zpool-vdev1    zpool-vdev2    zpool-vdev3
   7 #     loop0          loop1          loop2          loop3
   8 #     md0 (faulty)   md1 (faulty)   md2 (faulty)   md3 (faulty)
   9 #     <--------------------- raid10 zpool --------------------->
  10 #
  11
  12 FILES="/tmp/zpool-vdev0  \
  13        /tmp/zpool-vdev1  \
  14        /tmp/zpool-vdev2  \
  15        /tmp/zpool-vdev3"
  16 LODEVICES=""
  17 MDDEVICES=""
  18 MDDEVICES_M1=""
  19 MDDEVICES_M2=""
  20
  21 zpool_create() {
  22         local COUNT=0
  23
  24         check_loop_utils
  25         check_md_utils
  26         check_md_partitionable || die "Error non-partitionable md devices"
  27
  28         for FILE in ${FILES}; do
  29                 LODEVICE=`unused_loop_device`
  30                 MDDEVICE=`unused_md_device`
  31                 let COUNT=${COUNT}+1
  32
  33                 rm -f ${FILE} || exit 1
  34                 dd if=/dev/zero of=${FILE} bs=1M count=0 seek=256 \
  35                         &>/dev/null || die "Error $? creating ${FILE}"
  36
  37                 # Setup the loopback device on the file.
  38                 msg "Creating ${LODEVICE} using ${FILE}"
  39                 ${LOSETUP} ${LODEVICE} ${FILE} || \
  40                         die "Error $? creating ${LODEVICE} using ${FILE}"
  41
  42                 LODEVICES="${LODEVICES} ${LODEVICE}"
  43
  44                 # Setup the md device on the loopback device.
  45                 msg "Creating ${MDDEVICE} using ${LODEVICE}"
  46                 ${MDADM} --build ${MDDEVICE} --level=faulty                  \
  47                         --raid-devices=1 ${LODEVICE} &>/dev/null ||          \
  48                         (destroy_md_devices "${MDDEVICES}" &&                \
  49                         destroy_loop_devices "${LODEVICES}" &&               \
  50                         die "Error $? creating ${MDDEVICE} using ${LODEVICE}")
  51                 wait_udev ${MDDEVICE} 30 ||                                  \
  52                         (destroy_md_devices "${MDDEVICES}" &&                \
  53                         destroy_loop_devices "${LODEVICES}" &&               \
  54                         die "Error udev never created ${MDDEVICE}")
  55
  56                 # Create empty GPT/EFI partition table.
  57                 ${PARTED} --script ${MDDEVICE} mklabel gpt
  58                 MDDEVICES="${MDDEVICES} ${MDDEVICE}"
  59                 if [ $((COUNT % 2)) -eq 0 ]; then
  60                         MDDEVICES_M2="${MDDEVICES_M2} ${MDDEVICE}"
  61                 else
  62                         MDDEVICES_M1="${MDDEVICES_M1} ${MDDEVICE}"
  63                 fi
  64         done
  65
  66         msg ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME}                      \
  67                 mirror ${MDDEVICES_M1} mirror ${MDDEVICES_M2}
  68         ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME}                          \
  69                 mirror ${MDDEVICES_M1} mirror ${MDDEVICES_M2} ||             \
  70                 (destroy_md_devices "${MDDEVICES}" &&                        \
  71                 destroy_loop_devices "${LODEVICES}" && exit 1)
  72
  73         echo "$LODEVICES" >/tmp/zpool-lo.txt
  74         echo "$MDDEVICES" >/tmp/zpool-md.txt
  75 }
  76
  77 zpool_destroy() {
  78         msg ${ZPOOL} destroy ${ZPOOL_NAME}
  79         ${ZPOOL} destroy ${ZPOOL_NAME}
  80         destroy_md_devices "`cat /tmp/zpool-md.txt`"
  81         destroy_loop_devices "`cat /tmp/zpool-lo.txt`"
  82
  83         rm -f /tmp/zpool-md.txt /tmp/zpool-lo.txt
  84 }