#!/bin/bash
#
# zfs-speedmount
#
# Parallel mounting of all available zfs filesystems
#
# Author: Mikael Haglund <mikael.haglund@liu.se>
#

######

export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin
fs_raw=""
fs_ordered=""

function get_pool_filesystems()
{
  IFS="
  "
  tmp_fs=$(zfs list -r -t filesystem -H -o name,mountpoint $1 | awk '{print $1":"$2}')
  fs_raw="$fs_raw
	 $tmp_fs"
}

function get_pools()
{
  pools=$(zpool list -H -o name)
  echo  $pools
}

function orderfs()
{
  fs_ordered=$(echo "$fs_raw" |  awk -F":" '{print gsub(/\//,"/",$2)":"$1}' )
}

function mountfs()
{
  for i in $(echo "$fs_ordered" | awk -F":" '{print $1}' | sort | uniq ); do
    echo "$fs_ordered" | grep -E "^$i:" | cut -f 2 -d ":"  | sed -e "s/[[:blank:]]//g"  | /usr/local/bin/parallel --will-cite -j 40 zfs mount {}
    sleep 5
  done
}


get_all_filesystems()
{
  fs=""
  for pool in $(get_pools); do
     get_pool_filesystems $pool
  done
  orderfs
  mountfs
}

get_all_filesystems