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Directory : /usr/lib/dracut/modules.d/95iscsi/

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Current File : /usr/lib/dracut/modules.d/95iscsi/module-setup.sh

#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh

check() {
    local _rootdev
    # If our prerequisites are not met, fail anyways.
    require_binaries iscsistart hostname iscsi-iname || return 1

    # If hostonly was requested, fail the check if we are not actually
    # booting from root.

    is_iscsi() {
        local _dev=$1

        [[ -L "/sys/dev/block/$_dev" ]] || return
        cd "$(readlink -f "/sys/dev/block/$_dev")"
        until [[ -d sys || -d iscsi_session ]]; do
            cd ..
        done
        [[ -d iscsi_session ]]
    }

    [[ $hostonly ]] || [[ $mount_needs ]] && {
        pushd . >/dev/null
        for_each_host_dev_and_slaves is_iscsi
        local _is_iscsi=$?
        popd >/dev/null
        [[ $_is_iscsi == 0 ]] || return 255
    }
    return 0
}

get_ibft_mod() {
    local ibft_mac=$1
    local iface_mac iface_mod
    # Return the iSCSI offload module for a given MAC address
    for iface_desc in $(iscsiadm -m iface | cut -f 2 -d ' '); do
        iface_mod=${iface_desc%%,*}
        iface_mac=${iface_desc#*,}
        iface_mac=${iface_mac%%,*}
        if [ "$ibft_mac" = "$iface_mac" ] ; then
            echo $iface_mod
            return 0
        fi
    done
}

install_ibft() {
    # When iBFT / iscsi_boot is detected:
    # - Use 'ip=ibft' to set up iBFT network interface
    #   Note: bnx2i is using a different MAC address of iSCSI offloading
    #         so the 'ip=ibft' parameter must not be set
    # - specify firmware booting cmdline parameter

    for d in /sys/firmware/* ; do
        if [ -d ${d}/ethernet0 ] ; then
            read ibft_mac < ${d}/ethernet0/mac
            ibft_mod=$(get_ibft_mod $ibft_mac)
        fi
        if [ -z "$ibft_mod" ] && [ -d ${d}/ethernet1 ] ; then
            read ibft_mac < ${d}/ethernet1/mac
            ibft_mod=$(get_ibft_mod $ibft_mac)
        fi
        if [ -d ${d}/initiator ] ; then
            if [ ${d##*/} = "ibft" ] && [ "$ibft_mod" != "bnx2i" ] ; then
                echo -n "ip=ibft "
            fi
            echo -n "rd.iscsi.firmware=1"
        fi
    done
}

depends() {
    echo network rootfs-block
}

installkernel() {
    local _arch=$(uname -m)

    instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi
    hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
    iscsi_module_filter() {
        local _funcs='iscsi_register_transport'
        # subfunctions inherit following FDs
        local _merge=8 _side2=9
        function bmf1() {
            local _f
            while read _f; do
                case "$_f" in
                    *.ko)    [[ $(<         $_f) =~ $_funcs ]] && echo "$_f" ;;
                    *.ko.gz) [[ $(gzip -dc <$_f) =~ $_funcs ]] && echo "$_f" ;;
                    *.ko.xz) [[ $(xz -dc   <$_f) =~ $_funcs ]] && echo "$_f" ;;
                esac
            done
            return 0
        }

        function rotor() {
            local _f1 _f2
            while read _f1; do
                echo "$_f1"
                if read _f2; then
                    echo "$_f2" 1>&${_side2}
                fi
            done | bmf1 1>&${_merge}
            return 0
        }
        # Use two parallel streams to filter alternating modules.
        set +x
        eval "( ( rotor ) ${_side2}>&1 | bmf1 ) ${_merge}>&1"
        [[ $debug ]] && set -x
        return 0
    }

    { find_kernel_modules_by_path drivers/scsi; if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then find_kernel_modules_by_path drivers/s390/scsi; fi;} \
    | iscsi_module_filter  |  instmods
}

cmdline() {
    install_ibft
}

# called by dracut
install() {
    inst_multiple umount iscsistart hostname iscsi-iname
    inst_multiple -o iscsiuio
    inst_libdir_file 'libgcc_s.so*'

    # Detect iBFT and perform mandatory steps
    if [[ $hostonly_cmdline == "yes" ]] ; then
        local _ibftconf=$(install_ibft)
        [[ $_ibftconf ]] && printf "%s\n" "$_ibftconf" >> "${initdir}/etc/cmdline.d/95iscsi.conf"
    fi

    inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
    inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
    inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
    if ! dracut_module_included "systemd"; then
        inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
    else
        inst_multiple -o \
                      $systemdsystemunitdir/iscsi.service \
                      $systemdsystemunitdir/iscsid.service \
                      $systemdsystemunitdir/iscsid.socket \
                      $systemdsystemunitdir/iscsiuio.service \
                      $systemdsystemunitdir/iscsiuio.socket \
                      iscsiadm iscsid

        mkdir -p "${initdir}/$systemdsystemunitdir/sockets.target.wants"
        for i in \
                iscsiuio.socket \
            ; do
            ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/sockets.target.wants/${i}"
        done

        mkdir -p "${initdir}/$systemdsystemunitdir/basic.target.wants"
        for i in \
                iscsid.service \
            ; do
            ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/basic.target.wants/${i}"
        done

        # Make sure iscsid is started after dracut-cmdline and ready for the initqueue
        mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.service.d"
        (
            echo "[Unit]"
            echo "After=dracut-cmdline.service"
            echo "Before=dracut-initqueue.service"
        ) > "${initdir}/$systemdsystemunitdir/iscsid.service.d/dracut.conf"
    fi
    inst_dir /var/lib/iscsi
    dracut_need_initqueue
}

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