scripts/zpool-config/scsi_debug-raidz2.sh

   1 #!/bin/bash
   2 #
   3 # 1 scsi_debug device for fault injection and 3 loopback devices
   4 # on top of which is layered raidz2.
   5 #
   6
   7 SDSIZE=${SDSIZE:-256}
   8 SDHOSTS=${SDHOSTS:-1}
   9 SDTGTS=${SDTGTS:-1}
  10 SDLUNS=${SDLUNS:-1}
  11 LDMOD=/sbin/modprobe
  12 FILES="/tmp/zpool-vdev0  \
  13        /tmp/zpool-vdev1  \
  14        /tmp/zpool-vdev2"
  15 DEVICES=""
  16
  17 zpool_create() {
  18         check_loop_utils
  19         check_sd_utils
  20
  21         test `${LSMOD} | grep -c scsi_debug` -gt 0 &&                        \
  22                 (echo 0 >/sys/module/scsi_debug/parameters/every_nth &&      \
  23                 ${RMMOD} scsi_debug || exit 1)
  24         udev_trigger
  25
  26         msg "${LDMOD} scsi_debug dev_size_mb=${SDSIZE} "                     \
  27                 "add_host=${SDHOSTS} num_tgts=${SDTGTS} "                    \
  28                 "max_luns=${SDLUNS}"
  29         ${LDMOD} scsi_debug                                                  \
  30                 dev_size_mb=${SDSIZE}                                        \
  31                 add_host=${SDHOSTS}                                          \
  32                 num_tgts=${SDTGTS}                                           \
  33                 max_luns=${SDLUNS} ||                                        \
  34                 die "Error $? creating scsi_debug devices"
  35         udev_trigger
  36
  37         SDDEVICE=`${LSSCSI} | ${AWK} '/scsi_debug/ { print $6; exit }'`
  38         msg "${PARTED} -s ${SDDEVICE} mklabel gpt"
  39         ${PARTED} -s ${SDDEVICE} mklabel gpt ||                              \
  40                 (${RMMOD} scsi_debug && die "Error $? creating gpt label")
  41
  42         for FILE in ${FILES}; do
  43                 LODEVICE=`unused_loop_device`
  44
  45                 rm -f ${FILE} || exit 1
  46                 dd if=/dev/zero of=${FILE} bs=1024k count=0 seek=256         \
  47                         &>/dev/null || (${RMMOD} scsi_debug &&               \
  48                         die "Error $? creating ${FILE}")
  49
  50                 # Setup the loopback device on the file.
  51                 msg "Creating ${LODEVICE} using ${FILE}"
  52                 ${LOSETUP} ${LODEVICE} ${FILE} || (${RMMOD} scsi_debug       \
  53                         die "Error $? creating ${LODEVICE} using ${FILE}")
  54
  55                 DEVICES="${DEVICES} ${LODEVICE}"
  56         done
  57
  58         DEVICES="${DEVICES} ${SDDEVICE}"
  59
  60         msg "${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} raidz2 ${DEVICES}"
  61         ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} raidz2 ${DEVICES} ||     \
  62                 (${RMMOD} scsi_debug && exit 1)
  63 }
  64
  65 zpool_destroy() {
  66         msg ${ZPOOL} destroy ${ZPOOL_NAME}
  67         ${ZPOOL} destroy ${ZPOOL_NAME}
  68
  69         for FILE in ${FILES}; do
  70                 LODEVICE=`${LOSETUP} -a | grep ${FILE} | head -n1|cut -f1 -d:`
  71                 msg "Removing ${LODEVICE} using ${FILE}"
  72                 ${LOSETUP} -d ${LODEVICE} ||
  73                         die "Error $? destroying ${LODEVICE} using ${FILE}"
  74                 rm -f ${FILE} || exit 1
  75         done
  76
  77         msg "${RMMOD} scsi_debug"
  78         ${RMMOD} scsi_debug || die "Error $? removing scsi_debug devices"
  79 }