scripts/zpool-config/scsi_debug-raid10.sh

   1 #!/bin/bash
   2 #
   3 # 1 scsi_debug device for fault injection and 3 loopback devices
   4 # on top of which is layered raid10 (mirrored).
   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_M1=""
  16 DEVICES_M2=""
  17
  18 zpool_create() {
  19         local COUNT=0
  20
  21         check_loop_utils
  22         check_sd_utils
  23
  24         test `${LSMOD} | grep -c scsi_debug` -gt 0 &&                        \
  25                 (echo 0 >/sys/module/scsi_debug/parameters/every_nth &&      \
  26                 ${RMMOD} scsi_debug || exit 1)
  27         udev_trigger
  28
  29         msg "${LDMOD} scsi_debug dev_size_mb=${SDSIZE} "                     \
  30                 "add_host=${SDHOSTS} num_tgts=${SDTGTS} "                    \
  31                 "max_luns=${SDLUNS}"
  32         ${LDMOD} scsi_debug                                                  \
  33                 dev_size_mb=${SDSIZE}                                        \
  34                 add_host=${SDHOSTS}                                          \
  35                 num_tgts=${SDTGTS}                                           \
  36                 max_luns=${SDLUNS} ||                                        \
  37                 die "Error $? creating scsi_debug devices"
  38         udev_trigger
  39         SDDEVICE=`${LSSCSI}|${AWK} '/scsi_debug/ { print $6; exit }'`
  40         msg "${PARTED} -s ${SDDEVICE} mklabel gpt"
  41         ${PARTED} -s ${SDDEVICE} mklabel gpt ||                              \
  42                 (${RMMOD} scsi_debug && die "Error $? creating gpt label")
  43
  44         for FILE in ${FILES}; do
  45                 LODEVICE=`unused_loop_device`
  46
  47                 rm -f ${FILE} || exit 1
  48                 dd if=/dev/zero of=${FILE} bs=1024k count=0 seek=256         \
  49                         &>/dev/null || (${RMMOD} scsi_debug &&               \
  50                         die "Error $? creating ${FILE}")
  51
  52                 # Setup the loopback device on the file.
  53                 msg "Creating ${LODEVICE} using ${FILE}"
  54                 ${LOSETUP} ${LODEVICE} ${FILE} || (${RMMOD} scsi_debug       \
  55                         die "Error $? creating ${LODEVICE} using ${FILE}")
  56
  57                 DEVICES="${DEVICES} ${LODEVICE}"
  58         done
  59
  60         DEVICES="${DEVICES} ${SDDEVICE}"
  61
  62         for DEVICE in ${DEVICES}; do
  63                 let COUNT=${COUNT}+1
  64
  65                 if [ $((COUNT % 2)) -eq 0 ]; then
  66                         DEVICES_M2="${DEVICES_M2} ${DEVICE}"
  67                 else
  68                         DEVICES_M1="${DEVICES_M1} ${DEVICE}"
  69                 fi
  70         done
  71
  72         msg "${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME} "                   \
  73                 "mirror ${DEVICES_M1} mirror ${DEVICES_M2}"
  74         ${ZPOOL} create ${FORCE_FLAG} ${ZPOOL_NAME}                          \
  75                 mirror ${DEVICES_M1} mirror ${DEVICES_M2} ||                 \
  76                 (${RMMOD} scsi_debug && exit 1)
  77 }
  78
  79 zpool_destroy() {
  80         msg ${ZPOOL} destroy ${ZPOOL_NAME}
  81         ${ZPOOL} destroy ${ZPOOL_NAME}
  82
  83         for FILE in ${FILES}; do
  84                 LODEVICE=`${LOSETUP} -a | grep ${FILE} | head -n1|cut -f1 -d:`
  85                 msg "Removing ${LODEVICE} using ${FILE}"
  86                 ${LOSETUP} -d ${LODEVICE} ||
  87                         die "Error $? destroying ${LODEVICE} using ${FILE}"
  88                 rm -f ${FILE} || exit 1
  89         done
  90
  91         msg "${RMMOD} scsi_debug"
  92         ${RMMOD} scsi_debug || die "Error $? removing scsi_debug devices"
  93 }