diff options
Diffstat (limited to 'main/scstadmin/scstadmin.initd')
| -rw-r--r-- | main/scstadmin/scstadmin.initd | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/main/scstadmin/scstadmin.initd b/main/scstadmin/scstadmin.initd new file mode 100644 index 0000000000..af5cdd9856 --- /dev/null +++ b/main/scstadmin/scstadmin.initd @@ -0,0 +1,232 @@ +#!/sbin/runscript +# +# Copyright (C) 2008 Mark Buechler <mark.buechler@gmail.com> +# Copyright (C) 2009-2011 Bart Van Assche <bvanassche@acm.org> +# This software is made available under the GPLv2 license. +# +# System startup script for SCST. +# +# See also: +# * http://refspecs.freestandards.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html +# * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html +# + +SCST_CFG=/etc/scst.conf + +if [ ! -e /lib/lsb/init-functions ]; then + # Slackware and Gentoo. +rc_status() { + _rc_status_ret=$? + for i; do + case "$i" in + -v) + case "${_rc_status_ret}" in + 0) echo "OK";; + *) echo "Not running";; + esac + ;; + esac + done + return ${_rc_status_ret} +} +start_daemon() { + "$@" >/dev/null 2>&1 & +} +killproc() { + local exe="`basename "$1"`" + killall $exe + rm -f "/var/run/$exe.pid" +} +fi + +# Whether or not there is a "TARGET_DRIVER iscsi" section in scst.conf. +using_iscsi() { + for m in $SCST_MODULES; do + if [ $m = "iscsi_scst" ]; then + return 0 + fi + done + return 1 +} + +# Parse scst.conf and assign the list of associated kernel modules to +# SCST_MODULES. +parse_scst_conf() { + SCST_MODULES="scst" + SCST_OPT_MODULES="" + SCST_DAEMONS="" + if [ ! -e $SCST_CFG ]; then + return 0 + fi + local nonblanks="[^ ]\{1,\}" + local blanks="[ ]\{1,\}" + SCST_MODULES="$SCST_MODULES `sed -n -e 's/^HANDLER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{$/\1/p' \ + -e 's/^\[HANDLER'"$blanks"'\('"$nonblanks"'\)\]$/\1/p' $SCST_CFG \ + | while read h; do + case "$h" in + dev_cdrom) echo scst_cdrom;; + dev_changer) echo scst_changer;; + dev_disk*) echo scst_disk;; + dev_modisk*) echo scst_modisk;; + dev_processor) echo scst_processor;; + dev_raid) echo scst_raid;; + dev_tape*) echo scst_tape;; + dev_user) echo scst_user;; + vdisk*|vcdrom) echo scst_vdisk;; + *) echo "$h";; + esac + done | sort -u` \ + `sed -n 's/^TARGET_DRIVER'"$blanks"'\('"$nonblanks"'\)'"$blanks"'{$/\1/p' $SCST_CFG | while read d; do + case "$d" in + iscsi) echo iscsi_scst;; + qla2x00t) echo qla2x00tgt;; + *) echo "$d";; + esac + done | sort -u` \ + $SCST_TARGET_MODULES" + if using_iscsi; then + case "`uname -m`" in + x86_64|i686) + SCST_OPT_MODULES="crc32c-intel $SCST_OPT_MODULES";; + esac + SCST_OPT_MODULES="crc32c $SCST_OPT_MODULES" + SCST_DAEMONS="/usr/local/sbin/iscsi-scstd $SCST_DAEMONS" + fi +} + +# Unload SCST. parse_scst_conf must already have been invoked. +unload_scst() { + for d in $SCST_DAEMONS; do + killproc $d + done + + reverse_list="" + for m in $SCST_MODULES; do + reverse_list="$m $reverse_list" + done + for m in $reverse_list; do + refcnt="`cat /sys/module/$m/refcnt 2>/dev/null`" + if [ ! -z "$refcnt" ] && [ "$refcnt" -gt 0 ]; then + # Apparently it can happen that the iscsi_scst refcnt is only + # decremented a short time after killproc finished. If that + # occurs, sleep for a short time. + sleep 1 + fi + if [ -e /sys/module/$m/refcnt ] && ! rmmod $m; then + return 1 + fi + done + for m in $SCST_OPT_MODULES; do + reverse_list="$m $reverse_list" + done + for m in $reverse_list; do + rmmod $m >/dev/null 2>&1 + done + + # Clear the config in case unloading failed or SCST has been built into the + # kernel + if [ -e /sys/module/scst ]; then + scstadmin -noprompt -force -clear_config >/dev/null 2>&1 + fi + + return 0 +} + +start_scst() { + if [ -e /sys/module/scst -a -e /sys/module/scst/refcnt ]; then + echo Already started + return 1 + fi + + parse_scst_conf + + for m in $SCST_OPT_MODULES; do + modprobe $m >/dev/null 2>&1 + done + + for m in $SCST_MODULES; do + if [ ! -e /sys/module/$m ]; then + if ! modprobe $m; then + echo modprobe $m failed. + unload_scst + return 5 + fi + fi + done + + for d in $SCST_DAEMONS; do + options="" + if [ "$(basename "$d")" = "iscsi-scstd" ]; then + options="${ISCSID_OPTIONS}" + fi + if ! start_daemon $d $options; then + echo "Starting $d failed" + unload_scst + return 1 + fi + done + + if [ -f $SCST_CFG ]; then + scstadmin -force -noprompt -clear_config >/dev/null 2>&1 + tmpout=/tmp/scstadmin-output-$$ + if scstadmin -config $SCST_CFG >$tmpout 2>&1; then + rm -f $tmpout + return 0 + else + cat $tmpout + rm -f $tmpout + unload_scst + return 1 + fi + else + echo "SCST configuration file $SCST_CFG missing" + return 0 + fi +} + +stop_scst() { + if ! parse_scst_conf; then + return 1 + fi + + unload_scst +} + +scst_status() { + # Status has a slightly different meaning for the status command: + # 0 - service running + # 1 - service dead, but /var/run/ pid file exists + # 2 - service dead, but /var/lock/ lock file exists + # 3 - service not running + + parse_scst_conf + + for m in $SCST_MODULES; do + if [ ! -e /sys/module/$m ]; then + echo "$m: not loaded" + return 3 + fi + done + return 0 +} + +depend() { + need localmount + need net +} + +checkconfig() { + true +} + +start() { + ebegin "Starting SCST" + start_scst + eend $? +} + +stop() { + ebegin "Stopping SCST" + stop_scst + eend $? +} |