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From 1b827040f8b3e1e4fec19de76526fe0620654502 Mon Sep 17 00:00:00 2001
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From: Harald Hoyer <harald@redhat.com>
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Date: Mon, 7 Oct 2013 14:24:36 +0200
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Subject: [PATCH] fcoe: add FCoE UEFI boot device support
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---
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 modules.d/95fcoe/module-setup.sh   |   1 +
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 modules.d/95fcoe/parse-uefifcoe.sh |  35 +++++++
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 modules.d/99base/module-setup.sh   |   1 +
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 modules.d/99base/uefi-lib.sh       | 155 +++++++++++++++++++++++++++++
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 4 files changed, 192 insertions(+)
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 create mode 100755 modules.d/95fcoe/parse-uefifcoe.sh
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 create mode 100755 modules.d/99base/uefi-lib.sh
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diff --git a/modules.d/95fcoe/module-setup.sh b/modules.d/95fcoe/module-setup.sh
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index d3c58cc6..08ba4eac 100755
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--- a/modules.d/95fcoe/module-setup.sh
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+++ b/modules.d/95fcoe/module-setup.sh
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@@ -32,6 +32,7 @@ install() {
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     inst "$moddir/fcoe-up.sh" "/sbin/fcoe-up"
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     inst "$moddir/fcoe-edd.sh" "/sbin/fcoe-edd"
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     inst "$moddir/fcoe-genrules.sh" "/sbin/fcoe-genrules.sh"
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+    inst_hook cmdline 20 "$moddir/parse-uefifcoe.sh"
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     inst_hook cmdline 99 "$moddir/parse-fcoe.sh"
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     dracut_need_initqueue
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 }
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diff --git a/modules.d/95fcoe/parse-uefifcoe.sh b/modules.d/95fcoe/parse-uefifcoe.sh
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new file mode 100755
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index 00000000..e03bcb39
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--- /dev/null
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+++ b/modules.d/95fcoe/parse-uefifcoe.sh
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@@ -0,0 +1,35 @@
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+#!/bin/bash
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+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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+# ex: ts=8 sw=4 sts=4 et filetype=sh
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+
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+command -v getarg >/dev/null          || . /lib/dracut-lib.sh
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+command -v get_fcoe_boot_mac >/dev/null || . /lib/uefi-lib.sh
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+command -v set_ifname >/dev/null || . /lib/net-lib.sh
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+
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+print_fcoe_uefi_conf()
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+{
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+    local mac dev vlan
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+    mac=$(get_fcoe_boot_mac)
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+    [ -z "$mac" ] && continue
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+    dev=$(set_ifname fcoe $mac)
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+    vlan=$(get_fcoe_boot_vlan)
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+    if [ "$vlan" -ne "0" ]; then
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+        case "$vlan" in
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+            [0-9]*)
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+                printf "%s\n" "vlan=$dev.$vlan:$dev"
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+                dev="$dev.$vlan"
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+                ;;
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+            *)
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+                printf "%s\n" "vlan=$vlan:$dev"
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+                dev="$vlan"
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+                ;;
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+        esac
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+    fi
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+    # fcoe=eth0:nodcb
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+    printf "%s\n" "$dev:nodcb"
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+}
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+
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+
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+if [ -e /sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data ]; then
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+    print_fcoe_uefi_conf > /etc/cmdline.d/40-fcoe-uefi.conf
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+fi
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diff --git a/modules.d/99base/module-setup.sh b/modules.d/99base/module-setup.sh
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index 52ce4004..d33a0fb4 100755
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--- a/modules.d/99base/module-setup.sh
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+++ b/modules.d/99base/module-setup.sh
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@@ -42,6 +42,7 @@ install() {
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     mkdir -p ${initdir}/tmp
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     inst_simple "$moddir/dracut-lib.sh" "/lib/dracut-lib.sh"
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+    inst_simple "$moddir/uefi-lib.sh" "/lib/uefi-lib.sh"
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     if ! dracut_module_included "systemd"; then
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         inst_multiple switch_root || dfatal "Failed to install switch_root"
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diff --git a/modules.d/99base/uefi-lib.sh b/modules.d/99base/uefi-lib.sh
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new file mode 100755
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index 00000000..faedbac5
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--- /dev/null
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+++ b/modules.d/99base/uefi-lib.sh
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@@ -0,0 +1,155 @@
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+#!/bin/bash
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+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
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+# ex: ts=8 sw=4 sts=4 et filetype=sh
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+#
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+# Copyright 2013 Red Hat, Inc.  All rights reserved.
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+# Copyright 2013 Harald Hoyer <harald@redhat.com>
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+#
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
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+#
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+
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+getbyte () {
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+    local IFS= LC_CTYPE=C res c
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+    read -r -n 1 -d '' c
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+    res=$?
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+    # the single quote in the argument of the printf
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+    # yields the numeric value of $c (ASCII since LC_CTYPE=C)
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+    [[ -n $c ]] && c=$(printf '%u' "'$c") || c=0
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+    printf "$c"
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+    return $res
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+}
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+
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+getword () {
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+    local b1 b2 val
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+    b1=$(getbyte) || return 1
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+    b2=$(getbyte) || return 1
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+    (( val = b2 * 256 + b1 ))
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+    echo $val
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+    return 0
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+}
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+
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+# Acpi(PNP0A08,0x0)/Pci(0x3,0x0)/Pci(0x0,0x0)/MAC(90E2BA265ED4,0x0)/Vlan(172)/Fibre(0x4EA06104A0CC0050,0x0)
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+uefi_device_path()
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+{
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+    local IFS= LC_CTYPE=C res tt len type hextype first
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+    first=1
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+
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+    while :; do
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+        type=$(getbyte) || return 1
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+        subtype=$(getbyte) || return 1
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+        len=$(getword) || return 1
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+        hextype=$(printf "%02x%02x" "$type" "$subtype")
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+        if [[ $first == 1 ]]; then
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+            first=0
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+        elif [[ $hextype != "7fff" ]]; then
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+            printf "/"
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+        fi
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+        case $hextype in
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+            0101)
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+                # PCI
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+                tt=$(getword)
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+                printf "PCI(0x%x,0x%x)" $(($tt / 256)) $(($tt & 255))
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+                ;;
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+            0201)
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+                # ACPI
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+                printf "Acpi(0x%x,0x%x)" $(($(getword) + $(getword) * 65536)) $(($(getword) + $(getword) * 65536))
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+                ;;
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+            0303)
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+                # FIBRE
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+                getword &>/dev/null
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+                getword &>/dev/null
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+                printf "Fibre(0x%x%x%x%x%x%x%x%x,0x%x)" \
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+                    $(getbyte) $(getbyte) $(getbyte) $(getbyte) \
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+                    $(getbyte) $(getbyte) $(getbyte) $(getbyte) \
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+                    $(( $(getword) + $(getword) * 65536 + 4294967296 * ( $(getword) + $(getword) * 65536 ) ))
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+                ;;
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+            030b)
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+                # MAC
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+                printf "MAC(%02x%02x%02x%02x%02x%02x," $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
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+                read -r -N 26  tt || return 1
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+                printf "0x%x)"  $(getbyte)
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+                ;;
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+            0314)
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+                # VLAN
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+                printf "VLAN(%d)" $(getword)
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+                ;;
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+            7fff)
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+                # END
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+                printf "\n"
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+                return 0
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+                ;;
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+            *)
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+                printf "Unknown(Type:%d SubType:%d len=%d)" "$type" "$subtype" "$len"
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+                read -r -N $(($len-4))  tt || return 1
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+                ;;
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+        esac
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+    done
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+}
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+
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+get_fcoe_boot_mac()
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+{
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+    data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
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+    [ -f $data ] || return 1
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+    local IFS= LC_CTYPE=C tt len type hextype
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+    first=1
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+
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+    while :; do
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+        type=$(getbyte) || return 1
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+        subtype=$(getbyte) || return 1
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+        len=$(getword) || return 1
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+        hextype=$(printf "%02x%02x" "$type" "$subtype")
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+        case $hextype in
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+            030b)
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+                # MAC
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+                printf "%02x:%02x:%02x:%02x:%02x:%02x" $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
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+                read -r -N 27  tt || return 1
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+                ;;
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+            7fff)
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+                # END
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+                return 0
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+                ;;
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+            *)
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+                read -r -N $(($len-4))  tt || return 1
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+                ;;
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+        esac
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+    done < $data
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+}
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+
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+get_fcoe_boot_vlan()
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+{
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+    data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
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+    [ -f $data ] || return 1
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+    local IFS= LC_CTYPE=C tt len type hextype
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+    first=1
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+
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+    while :; do
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+        type=$(getbyte) || return 1
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+        subtype=$(getbyte) || return 1
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+        len=$(getword) || return 1
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+        hextype=$(printf "%02x%02x" "$type" "$subtype")
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+        case $hextype in
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+            0314)
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+                # VLAN
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+                printf "%d" $(getword)
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+                ;;
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+            7fff)
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+                # END
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+                return 0
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+                ;;
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+            *)
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+                read -r -N $(($len-4))  tt || return 1
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+                ;;
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+        esac
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+    done < $data
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+}