scripts/zfs.sh

   1 #!/bin/bash
   2 #
   3 # A simple script to simply the loading/unloading the ZFS module stack.
   4
   5 basedir=$(dirname "$0")
   6
   7 SCRIPT_COMMON=common.sh
   8 if [ -f "${basedir}/${SCRIPT_COMMON}" ]; then
   9 . "${basedir}/${SCRIPT_COMMON}"
  10 else
  11 echo "Missing helper script ${SCRIPT_COMMON}" && exit 1
  12 fi
  13
  14 # shellcheck disable=SC2034
  15 PROG=zfs.sh
  16 UNLOAD=
  17
  18 usage() {
  19 cat << EOF
  20 USAGE:
  21 $0 [hvud] [module-options]
  22
  23 DESCRIPTION:
  24         Load/unload the ZFS module stack.
  25
  26 OPTIONS:
  27         -h      Show this message
  28         -v      Verbose
  29         -u      Unload modules
  30
  31 MODULE-OPTIONS:
  32         Must be of the from module="options", for example:
  33
  34 $0 zfs="zfs_prefetch_disable=1"
  35 $0 zfs="zfs_prefetch_disable=1 zfs_mdcomp_disable=1"
  36
  37 EOF
  38 }
  39
  40 while getopts 'hvu' OPTION; do
  41         case $OPTION in
  42         h)
  43                 usage
  44                 exit 1
  45                 ;;
  46         v)
  47                 # shellcheck disable=SC2034
  48                 VERBOSE=1
  49                 ;;
  50         u)
  51                 UNLOAD=1
  52                 ;;
  53         ?)
  54                 usage
  55                 exit
  56                 ;;
  57         esac
  58 done
  59
  60 if [ "$(id -u)" != 0 ]; then
  61         die "Must run as root"
  62 fi
  63
  64 if [ ${UNLOAD} ]; then
  65         kill_zed
  66         umount -t zfs -a
  67         stack_check
  68         unload_modules
  69 else
  70         stack_clear
  71         check_modules || die "${ERROR}"
  72         load_modules "$@" || die "Failed to load modules"
  73         wait_udev /dev/zfs 30 || die "'/dev/zfs' was not created"
  74 fi
  75
  76 exit 0