debian/nbd-client.init.d

   1 #!/bin/sh
   2 # vim: ft=sh
   3 #
   4 # skeleton      example file to build /etc/init.d/ scripts.
   5 #               This file should be used to construct scripts for /etc/init.d.
   6 #
   7 #               Written by Miquel van Smoorenburg <miquels@cistron.nl>.
   8 #               Modified for Debian GNU/Linux
   9 #               by Ian Murdock <imurdock@gnu.ai.mit.edu>.
  10 #               Modified for the nbd-client package
  11 #               by Wouter Verhelst <wouter@debian.org>
  12 #
  13 ### BEGIN INIT INFO
  14 # Provides: nbd-client
  15 # Required-Start: $network $local_fs
  16 # Required-Stop: $network
  17 # Default-Start: S
  18 # Default-Stop: 0 6
  19 # X-Start-Before: mountnfs
  20 # Short-Description: Network Block Device client
  21 ### END INIT INFO
  22 #
  23 # Version:      @(#)skeleton  1.8  03-Mar-1998  miquels@cistron.nl
  24
  25 PATH=/sbin:/bin:/usr/sbin:/usr/bin
  26 DAEMON="/sbin/nbd-client"
  27 NAME="nbd-client"
  28 DESC="NBD client process"
  29
  30 test -f /etc/nbd-client && . /etc/nbd-client
  31
  32 test -x $DAEMON || exit 0
  33
  34 case "$1" in
  35     connect)
  36         # I don't use start-stop-daemon: nbd-client only does some setup
  37         # for the connection; the 'nbd-client' you see in your ps output
  38         # later on is a kernel thread...
  39         modprobe nbd
  40         echo -n 'Connecting...'
  41         for dev in $(awk '/^(( \t)*[^#])/{print $1}' /etc/nbdtab)
  42         do
  43           # cfq deadlocks NBD devices, so switch to something else if cfq is
  44           # selected by default
  45           # This doesn't take into account non-udev devnames, but since
  46           # there's really no other option these days...
  47           if grep '\[cfq\]' "/sys/block/${dev}/queue/scheduler" >/dev/null; then
  48                 echo deadline > "/sys/block/${dev}/queue/scheduler"
  49           fi
  50           if nbd-client -c "${dev}" >/dev/null
  51           then
  52                 echo "${dev} already connected, skipping..."
  53           else
  54                 nbd-client ${dev}
  55           fi
  56         done
  57         ;;
  58     start)
  59         echo -n "Starting $DESC: "
  60         $0 connect
  61         if [ ! -f /run/sendsigs.omit.d/nbd-client ]
  62         then
  63           for x in $(cat /proc/cmdline); do
  64             case $x in
  65               nbdroot=*,*,*)
  66                 nbdroot="${x#nbdroot=}"
  67                 nbdbasedev=$(echo "$nbdroot" | sed -e 's/^.*,//')
  68                 nbdrootdev=/dev/$nbdbasedev
  69                 ;;
  70               root=/dev/nbd*)
  71                 nbdrootdev="${x#root=}"
  72                 ;;
  73             esac
  74           done
  75           OMITKILL="$OMITKILL ${nbdrootdev%p*}"
  76           for x in $OMITKILL
  77           do
  78             nbd-client -c $x >> /run/sendsigs.omit.d/nbd-client
  79           done
  80         fi
  81         ;;
  82     stop)
  83         echo "Stopping $DESC: "
  84         for dev in $(awk '/^(( \t)*[^#])/{print $1}' /etc/nbdtab)
  85         do
  86           nbd-client -d /dev/$dev
  87         done
  88         rmmod nbd
  89         echo "$NAME."
  90         ;;
  91     restart|force-reload)
  92         $0 stop
  93         sleep 10
  94         $0 start
  95         ;;
  96     *)
  97         N=/etc/init.d/$NAME
  98         echo "Usage: $N {start|connect|stop|restart|force-reload}" >&2
  99         exit 1
 100         ;;
 101 esac
 102
 103 exit 0