scripts/zpool-config/lo-faulty-raid0.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 raid0 (striped).
   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 #     <--------------------- raid0 zpool --------------------->
  10 #
  11
  12 FILEDIR=${FILEDIR:-/var/tmp}
  13 FILES=${FILES:-"$FILEDIR/file-vdev0 $FILEDIR/file-vdev1 \
  14     $FILEDIR/file-vdev2 $FILEDIR/file-vdev3"}
  15 LODEVICES=""
  16 MDDEVICES=""
  17
  18 zpool_create() {
  19         check_loop_utils
  20         check_md_utils
  21         check_md_partitionable || die "Error non-partitionable md devices"
  22
  23         for FILE in ${FILES}; do
  24                 LODEVICE=`unused_loop_device`
  25                 MDDEVICE=`unused_md_device`
  26
  27                 rm -f ${FILE} || exit 1
  28                 dd if=/dev/zero of=${FILE} bs=1M count=0 seek=256 \
  29                         &>/dev/null || die "Error $? creating ${FILE}"
  30
  31                 # Setup the loopback device on the file.
  32                 msg "Creating ${LODEVICE} using ${FILE}"
  33                 ${LOSETUP} ${LODEVICE} ${FILE} || \
  34                         die "Error $? creating ${LODEVICE} using ${FILE}"
  35
  36                 LODEVICES="${LODEVICES} ${LODEVICE}"
  37
  38                 # Setup the md device on the loopback device.
  39                 msg "Creating ${MDDEVICE} using ${LODEVICE}"
  40                 ${MDADM} --build ${MDDEVICE} --level=faulty                  \
  41                         --raid-devices=1 ${LODEVICE} &>/dev/null ||          \
  42                         (destroy_md_devices "${MDDEVICES}" &&                \
  43                         destroy_loop_devices "${LODEVICES}" &&               \
  44                         die "Error $? creating ${MDDEVICE} using ${LODEVICE}")
  45                 wait_udev ${MDDEVICE} 30 ||                                  \
  46                         (destroy_md_devices "${MDDEVICES}" &&                \
  47                         destroy_loop_devices "${LODEVICES}" &&               \
  48                         die "Error udev never created ${MDDEVICE}")
  49
  50                 # Check if the md device support partitions
  51                 ${BLOCKDEV} --rereadpt ${MDDEVICE} 2>/dev/null ||            \
  52                         (destroy_md_devices "${MDDEVICES}" &&                \
  53                         destroy_loop_devices "${LODEVICES}" &&               \
  54                         die "Error ${MDDEVICE} does not support partitions")
  55
  56                 # Create a GPT/EFI partition table for ZFS to use.
  57                 ${PARTED} --script ${MDDEVICE} mklabel gpt
  58                 MDDEVICES="${MDDEVICES} ${MDDEVICE}"
  59         done
  60
  61         msg ${ZPOOL} create ${ZPOOL_FLAGS} ${ZPOOL_NAME} ${MDDEVICES}
  62         ${ZPOOL} create ${ZPOOL_FLAGS} ${ZPOOL_NAME} ${MDDEVICES} ||          \
  63                 (destroy_md_devices "${MDDEVICES}" &&                        \
  64                 destroy_loop_devices "${LODEVICES}" && exit 1)
  65
  66         echo "$LODEVICES" >/tmp/zpool-lo.txt
  67         echo "$MDDEVICES" >/tmp/zpool-md.txt
  68 }
  69
  70 zpool_destroy() {
  71         msg ${ZPOOL} destroy ${ZPOOL_NAME}
  72         ${ZPOOL} destroy ${ZPOOL_NAME}
  73         destroy_md_devices "`cat /tmp/zpool-md.txt`"
  74         destroy_loop_devices "`cat /tmp/zpool-lo.txt`"
  75
  76         rm -f /tmp/zpool-md.txt /tmp/zpool-lo.txt
  77 }