#!/sbin/runscript
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

# Based on openibd script from openfabrics.org,
#  Copyright (c) 2006 Mellanox Technologies. All rights reserved.
#  Distributed under the terms of the GNU General Public License v2

depend() {
    after hotplug
    before net         # init openib before starting any ipoib interfaces
}

OPENIB_CONFDIR=${OPENIB_CONFDIR:-/etc/infiniband}

if [[ -r ${OPENIB_CONFDIR}/openib.conf ]] ; then
    . ${OPENIB_CONFDIR}/openib.conf
fi

# Setting OpenIB start parameters
POST_LOAD_MODULES=""

if [ "X${SDP_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_sdp"
    IPOIB_LOAD="yes"
fi

IPOIB=0
if [ "X${IPOIB_LOAD}" == "Xyes" ]; then
    IPOIB=1
fi

if [ "X${SRP_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_srp"
fi

if [ "X${SRP_TARGET_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_srp_target"
fi

if [ "X${RDMA_CM_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES rdma_cm"
fi

if [ "X${UCM_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_ucm"
fi

if [ "X${RDS_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_rds"
fi

if [ "X${ISER_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES ib_iser"
fi

if [ "X${RDMA_UCM_LOAD}" == "Xyes" ]; then
    POST_LOAD_MODULES="$POST_LOAD_MODULES rdma_ucm"
fi

PRE_UNLOAD_MODULES="ib_rds ib_ucm kdapl ib_srp_target scsi_target ib_srp ib_iser ib_sdp rdma_ucm rdma_cm ib_addr ib_cm ib_local_sa findex"

# W/A for unloading modules
POST_UNLOAD_MODULES="$PRE_UNLOAD_MODULES ib_ipoib ib_sa ib_uverbs ib_umad"
# ib_mthca ib_ipath - don't unload unless they are in openib.conf
[[ "${MTHCA_LOAD}" == "yes" ]] && \
    POST_UNLOAD_MODULES="$POST_UNLOAD_MODULES ib_mthca"
[[ "${IPATH_LOAD}" == "yes" ]] && \
    POST_UNLOAD_MODULES="$POST_UNLOAD_MODULES ib_ipath ipath_core"

[[ "${MTHCA_LOAD}" == "yes" || "${IPATH_LOAD}" == "yes" ]] && \
    POST_UNLOAD_MODULES="$POST_UNLOAD_MODULES ib_mad ib_core"

#STATUS_MODULES="rdma_ucm ib_rds ib_srp ib_sdp rdma_cm ib_addr ib_local_sa findex ib_ipoib ib_ipath ipath_core ib_mthca ib_uverbs ib_umad ib_ucm ib_sa ib_cm ib_mad ib_core"


# If module $1 is loaded return - 0 else - 1
is_module()
{
    local RC

    /bin/lsmod | grep -w "$1" > /dev/null 2>&1
    RC=$?

    return $RC
}

unload()
{
    # Unload module $1
    if is_module $mod; then
        /sbin/modprobe -r $mod > /dev/null 2>&1
        if [ $? -ne 0 ]; then
            # Try rmmod if modprobe failed: case that previous installation included more IB modules.
            /sbin/rmmod $mod > /dev/null 2>&1
            if [ $? -ne 0 ]; then
                ewarn "Failed to unload $mod"
                return 1
            fi
        fi
    fi
}

start() {
    local RC=0
    ebegin "Initializing Infiniband"
    eindent

    # Load Mellanox HCA driver if explicitly requested
    # (however, it should be loaded automatically by udev)

    einfo "Loading HCA and Access Layer drivers"

    if [[ "${MTHCA_LOAD}" == "yes" ]]; then
        /sbin/modprobe ib_mthca > /dev/null 2>&1
        RC=$[ $RC + $? ]
    fi
    if [[ "${IPATH_LOAD}" == "yes" ]]; then
        /sbin/modprobe ib_ipath > /dev/null 2>&1
        RC=$[ $RC + $? ]
    fi

    # Add node description to sysfs
    IBSYSDIR="/sys/class/infiniband"
    if [ -d ${IBSYSDIR} ]; then
        declare -i hca_id=1
        for hca in ${IBSYSDIR}/*; do
            if [ -e ${hca}/node_desc ]; then
                echo -n "$(hostname -s) HCA-${hca_id}" >> ${hca}/node_desc
            fi
            let hca_id++
        done
    fi
    /sbin/modprobe ib_umad > /dev/null 2>&1
    RC=$[ $RC + $? ]
    /sbin/modprobe ib_uverbs > /dev/null 2>&1
    RC=$[ $RC + $? ]

    if [ $IPOIB -eq 1 ]; then
        # this section is not necessary if all ib-over-ib devices are
        # aliased properly in /etc/modules.d/openib
        einfo "loading ib_ipoib module"
        /sbin/modprobe ib_ipoib > /dev/null 2>&1
        RC=$[ $RC + $? ]
        if (( ! RC )); then
            # start the ipoib devices automatically...
            # this is probably a bad idea (the concept is taken from the
            # original SUSE/Redhat-based initscript), and should be removed.
            # But it works, and is not enabled by default.  So I leave it here
            # for second opinions.
            local ibdevs=`rc-status -u -nc |egrep 'net\.ib[0-9a-zA-Z]+.*stopped' | awk '{print $1}'`
            if [ -n "$ibdevs" ] ; then
                einfo "starting ipoib devices"
                for ibdev in $ibdevs; do
                    /etc/init.d/$ibdev start
                done
            fi
        fi
    fi

    # Devices for ib_umad and ib_uverbs should now have been created.
    if [ ! -d /dev/infiniband/ ]; then
        eerror "udev failed to create '/dev/infiniband/' devices"
        RC=1
    fi

    # Load configured modules
    if [ "$POST_LOAD_MODULES" != "" ]; then
        for mod in  $POST_LOAD_MODULES
        do
            case $mod in
                ib_iser)
                    # Voltaire requirement
                    /sbin/modprobe --force-modversion $mod > /dev/null 2>&1
                ;;
                *)
                    /sbin/modprobe $mod > /dev/null 2>&1
                ;;
            esac
            RC=$?
            [ $RC -ne 0 ] && eerror "Failed to load $mod"
        done
    fi

    eoutdent
    eend $RC
}

stop() {
    ebegin "Stopping Infiniband"
    local RC=0

    # Check if applications which use infiniband are running
    local apps="opensm osmtest ibbs ibns"
    local pid

    for app in $apps
    do
        if ( ps -ef | grep $app | grep -v grep > /dev/null 2>&1 ); then
            eerror "Please stop $app and all applications running over InfiniBand"
            eend 1
            return
        fi
    done

    if ! is_module ib_core; then
        einfo "HCA driver is not loaded"
        eend 0
        return
    fi

    # Unload ULPs modules

    if [ "$PRE_UNLOAD_MODULES" != "" ]; then
        for mod in $PRE_UNLOAD_MODULES
        do
            unload $mod || { eend 1; return; }
        done
    fi

    # Remove srp_presistant_bind.sh before removing ib_srp module
    PID_SCRPT_TO_KILL=`ps -efww | grep srp_persistent | grep -v grep | awk '{print $2}'`
    if ! [ "$PID_SCRPT_TO_KILL" == "" ]; then
        PID_SLEEP_TO_KILL=`ps -efww | grep $PID_SCRPT_TO_KILL | grep sleep | awk '{print $2}'`
        kill -9 $PID_SCRPT_TO_KILL
    fi
    if ! [ "$PID_SLEEP_TO_KILL" == "" ]; then
        kill -9 $PID_SLEEP_TO_KILL
    fi

    # Unload OpenIB modules

    if [ "$POST_UNLOAD_MODULES" != "" ]; then
        for mod in  $POST_UNLOAD_MODULES
        do
            unload $mod || RC=1
        done
    fi

    eend $RC
}