mirror of
https://github.com/SCST-project/scst.git
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562809a2da
git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@3569 d57e44dd-8a1f-0410-8b47-8ef2f437770f
299 lines
8.4 KiB
Bash
Executable File
299 lines
8.4 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (C) 2008 Mark Buechler <mark.buechler@gmail.com>
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# Copyright (C) 2009-2011 Bart Van Assche <bvanassche@acm.org>
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# This software is made available under the GPLv2 license.
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#
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# System startup script for SCST.
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#
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# See also:
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# * http://refspecs.freestandards.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
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# * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
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#
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### BEGIN INIT INFO
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# Provides: scst
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# Required-Start: $syslog $local_fs $network
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# Required-Stop: $syslog $local_fs $network
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Description: SCST - A Generic SCSI Target Subsystem
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### END INIT INFO
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### BEGIN CHKCONFIG INFO
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# chkconfig: 2345 13 87
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# description: SCST - A Generic SCSI Target Subsystem
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### END CHKCONFIG INFO
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# Return values according to LSB for all commands except status:
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# 0 - success
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# 1 - generic or unspecified error
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# 2 - invalid or excess argument(s)
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# 3 - unimplemented feature (e.g. "reload")
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# 4 - insufficient privilege
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# 5 - program is not installed
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# 6 - program is not configured
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# 7 - program is not running
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#
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if [ -e /lib/lsb/init-functions ]; then
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# Debian, RHEL / Fedora, SLES / openSUSE.
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. /lib/lsb/init-functions
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else
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# Slackware / Gentoo.
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start_daemon() {
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"$@" >/dev/null 2>&1 &
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}
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killproc() {
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local exe="`basename "$1"`"
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killall $exe
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rm -f "/var/run/$exe.pid"
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}
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log_success_msg() {
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echo "$@"
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}
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log_failure_msg() {
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echo "$@"
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}
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fi
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PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/sbin:/usr/local/bin
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SCST_CFG=/etc/scst.conf
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SCST_DFLT=/etc/default/scst
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[ -x "$(which scstadmin)" ] || exit 5
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if [ -f $SCST_DFLT ]; then
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. $SCST_DFLT
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fi
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# Whether or not there is a "TARGET_DRIVER iscsi" section in scst.conf.
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using_iscsi() {
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for m in $SCST_MODULES; do
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if [ $m = "iscsi_scst" ]; then
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return 0
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fi
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done
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return 1
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}
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# Parse scst.conf and assign the list of associated kernel modules to
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# SCST_MODULES.
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parse_scst_conf() {
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if [ ! -e $SCST_CFG ]; then
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return 1
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fi
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local nonblanks="[^ ]\{1,\}"
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local blanks="[ ]\{1,\}"
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SCST_MODULES="scst `sed -n -e 's/^HANDLER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{$/\1/p' \
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-e 's/^\[HANDLER'"$blanks"'\('"$nonblanks"'\)\]$/\1/p' $SCST_CFG \
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| while read h; do
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case "$h" in
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dev_cdrom) echo scst_cdrom;;
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dev_changer) echo scst_changer;;
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dev_disk*) echo scst_disk;;
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dev_modisk*) echo scst_modisk;;
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dev_processor) echo scst_processor;;
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dev_raid) echo scst_raid;;
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dev_tape*) echo scst_tape;;
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dev_user) echo scst_user;;
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vdisk*|vcdrom) echo scst_vdisk;;
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*) echo "$h";;
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esac
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done | sort -u` \
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`sed -n 's/^TARGET_DRIVER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{$/\1/p' $SCST_CFG | while read d; do
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case "$d" in
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iscsi) echo iscsi_scst;;
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qla2x00t) echo qla2x00tgt;;
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*) echo "$d";;
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esac
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done | sort -u` \
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$SCST_TARGET_MODULES"
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if using_iscsi; then
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case "`uname -m`" in
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x86_64|i686)
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SCST_OPT_MODULES="crc32c-intel $SCST_OPT_MODULES";;
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esac
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SCST_OPT_MODULES="crc32c $SCST_OPT_MODULES"
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SCST_DAEMONS="/usr/local/sbin/iscsi-scstd $SCST_DAEMONS"
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fi
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}
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# Stop SCST. parse_scst_conf must already have been invoked.
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stop() {
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for d in $SCST_DAEMONS; do
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killproc $d
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done
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reverse_list=""
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for m in $SCST_MODULES; do
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reverse_list="$m $reverse_list"
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done
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for m in $reverse_list; do
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refcnt="`cat /sys/module/$m/refcnt 2>/dev/null`"
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if [ ! -z "$refcnt" ] && [ "$refcnt" -gt 0 ]; then
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# Apparently it can happen that the iscsi_scst refcnt is only
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# decremented a short time after killproc finished. If that
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# occurs, sleep for a short time.
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sleep 1
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fi
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if [ -e /sys/module/$m/refcnt ] && ! rmmod $m; then
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return 1
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fi
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done
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for m in $SCST_OPT_MODULES; do
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reverse_list="$m $reverse_list"
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done
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for m in $reverse_list; do
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rmmod $m >/dev/null 2>&1
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done
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# Clear the config in case unloading failed or SCST has been built into the
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# kernel
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if [ -e /sys/module/scst ]; then
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echo y | scstadmin -clear_config -force >/dev/null 2>&1
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fi
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return 0
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}
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case "$1" in
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start)
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## Start the service.
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echo -n "Loading and configuring SCST"
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if [ -e /sys/module/scst -a -e /sys/module/scst/refcnt ]; then
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log_failure_msg
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echo Already started
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exit 1
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fi
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parse_scst_conf
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for m in $SCST_OPT_MODULES; do
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modprobe $m >/dev/null 2>&1
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done
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for m in $SCST_MODULES; do
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module_params="`set | sed -n -e "s/^${m}_parameters='\(.*\)'$/\1/p"\
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-e "s/^${m}_parameters=\(.*\)$/\1/p"`"
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if [ ! -e /sys/module/$m ]; then
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if ! modprobe $m $module_params; then
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log_failure_msg
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echo modprobe $m $module_params failed.
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stop
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exit 5
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fi
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else
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for pv in $module_params; do
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echo $pv | sed 's/=/ /' \
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| { read param value;
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echo "$value" >/sys/module/$m/parameters/$param; }
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done
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fi
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done
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for d in $SCST_DAEMONS; do
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if ! start_daemon $d; then
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log_failure_msg
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echo "Starting $d failed"
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stop
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exit 1
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fi
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done
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if [ -f $SCST_CFG ]; then
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echo y | scstadmin -clear_config -force >/dev/null 2>&1
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tmpout=/tmp/scstadmin-output-$$
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if scstadmin -config $SCST_CFG >$tmpout 2>&1; then
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rm -f $tmpout
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log_success_msg
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else
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log_failure_msg
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cat $tmpout
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rm -f $tmpout
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stop
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exit 1
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fi
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else
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log_success_msg
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echo "SCST configuration file $SCST_CFG missing"
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fi
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;;
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stop)
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## Stop the service.
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echo -n "Stopping SCST"
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if ! parse_scst_conf; then
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log_failure_msg "No $SCST_CFG found"
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exit 1
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fi
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stop
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rc=$?
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if [ $rc = 0 ]; then
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log_success_msg
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else
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log_failure_msg
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fi
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exit $rc
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;;
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restart)
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## Stop and restart the service if the service is already running,
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## otherwise start the service.
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if $0 stop; then
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$0 start
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fi
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;;
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try-restart)
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## Restart the service if the service is already running.
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$0 status >/dev/null 2>&1 && $0 restart
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;;
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reload)
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## Cause the configuration of the service to be reloaded without
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## actually stopping and restarting the service.
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echo -n "Reloading SCST configuration"
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if scstadmin -config $SCST_CFG >/dev/null 2>&1; then
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log_success_msg
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else
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log_failure_msg
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exit 1
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fi
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;;
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force-reload)
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## Cause the configuration to be reloaded if the service supports this,
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## otherwise restart the service if it is running.
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echo -n "Reloading SCST configuration"
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if scstadmin -config $SCST_CFG >/dev/null 2>&1; then
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log_success_msg
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else
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$0 restart
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fi
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;;
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status)
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## Print the current status of the service.
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echo -n "SCST status: "
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# Status has a slightly different meaning for the status command:
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# 0 - service running
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# 1 - service dead, but /var/run/ pid file exists
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# 2 - service dead, but /var/lock/ lock file exists
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# 3 - service not running
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parse_scst_conf
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for m in $SCST_MODULES; do
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if [ ! -e /sys/module/$m ]; then
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echo "$m: not loaded"
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exit 3
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fi
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done
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echo "OK"
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;;
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*)
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echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload}"
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exit 2
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;;
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esac
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exit 0
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