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 FILES="/tmp/zpool-vdev0  \
  13        /tmp/zpool-vdev1  \
  14        /tmp/zpool-vdev2  \
  15        /tmp/zpool-vdev3"
  16 LODEVICES=""
  17 MDDEVICES=""
  18
  19 zpool_create() {
  20         check_loop_utils
  21         check_md_utils
  22         check_md_partitionable || die "Error non-partitionable md devices"
  23
  24         for FILE in ${FILES}; do
  25                 LODEVICE=`unused_loop_device`
  26                 MDDEVICE=`unused_md_device`
  27
  28                 rm -f ${FILE} || exit 1
  29                 dd if=/dev/zero of=${FILE} bs=1M count=0 seek=256 \
  30                         &>/dev/null || die "Error $? creating ${FILE}"
  31
  32                 # Setup the loopback device on the file.
  33                 msg "Creating ${LODEVICE} using ${FILE}"
  34                 ${LOSETUP} ${LODEVICE} ${FILE} || \
  35                         die "Error $? creating ${LODEVICE} using ${FILE}"
  36
  37                 LODEVICES="${LODEVICES} ${LODEVICE}"
  38
  39                 # Setup the md device on the loopback device.
  40                 msg "Creating ${MDDEVICE} using ${LODEVICE}"
  41                 ${MDADM} --build ${MDDEVICE} --level=faulty                  \
  42                         --raid-devices=1 ${LODEVICE} &>/dev/null ||          \
  43                         (destroy_md_devices "${MDDEVICES}" &&                \
  44                         destroy_loop_devices "${LODEVICES}" &&               \
  45                         die "Error $? creating ${MDDEVICE} using ${LODEVICE}")
  46                 wait_udev ${MDDEVICE} 30 ||                                  \
  47                         (destroy_md_devices "${MDDEVICES}" &&                \
  48                         destroy_loop_devices "${LODEVICES}" &&               \
  49                         die "Error udev never created ${MDDEVICE}")
  50
  51                 # Check if the md device support partitions
  52                 ${BLOCKDEV} --rereadpt ${MDDEVICE} 2>/dev/null ||            \
  53                         (destroy_md_devices "${MDDEVICES}" &&                \
  54                         destroy_loop_devices "${LODEVICES}" &&               \
  55                         die "Error ${MDDEVICE} does not support partitions")
  56
  57                 # Create a GPT/EFI partition table for ZFS to use.
  58                 ${PARTED} --script ${MDDEVICE} mklabel gpt
  59                 MDDEVICES="${MDDEVICES} ${MDDEVICE}"
  60         done
  61
  62         msg ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} ${MDDEVICES}
  63         ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} ${MDDEVICES} ||          \
  64                 (destroy_md_devices "${MDDEVICES}" &&                        \
  65                 destroy_loop_devices "${LODEVICES}" && exit 1)
  66
  67         echo "$LODEVICES" >/tmp/zpool-lo.txt
  68         echo "$MDDEVICES" >/tmp/zpool-md.txt
  69 }
  70
  71 zpool_destroy() {
  72         msg ${ZPOOL} destroy ${ZPOOL_NAME}
  73         ${ZPOOL} destroy ${ZPOOL_NAME}
  74         destroy_md_devices "`cat /tmp/zpool-md.txt`"
  75         destroy_loop_devices "`cat /tmp/zpool-lo.txt`"
  76
  77         rm -f /tmp/zpool-md.txt /tmp/zpool-lo.txt
  78 }