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From 1b827040f8b3e1e4fec19de76526fe0620654502 Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald@redhat.com>
Date: Mon, 7 Oct 2013 14:24:36 +0200
Subject: [PATCH] fcoe: add FCoE UEFI boot device support

---
 modules.d/95fcoe/module-setup.sh   |   1 +
 modules.d/95fcoe/parse-uefifcoe.sh |  35 +++++++++
 modules.d/99base/module-setup.sh   |   1 +
 modules.d/99base/uefi-lib.sh       | 155 +++++++++++++++++++++++++++++++++++++
 4 files changed, 192 insertions(+)
 create mode 100755 modules.d/95fcoe/parse-uefifcoe.sh
 create mode 100755 modules.d/99base/uefi-lib.sh

diff --git a/modules.d/95fcoe/module-setup.sh b/modules.d/95fcoe/module-setup.sh
index d3c58cc..08ba4ea 100755
--- a/modules.d/95fcoe/module-setup.sh
+++ b/modules.d/95fcoe/module-setup.sh
@@ -32,6 +32,7 @@ install() {
     inst "$moddir/fcoe-up.sh" "/sbin/fcoe-up"
     inst "$moddir/fcoe-edd.sh" "/sbin/fcoe-edd"
     inst "$moddir/fcoe-genrules.sh" "/sbin/fcoe-genrules.sh"
+    inst_hook cmdline 20 "$moddir/parse-uefifcoe.sh"
     inst_hook cmdline 99 "$moddir/parse-fcoe.sh"
     dracut_need_initqueue
 }
diff --git a/modules.d/95fcoe/parse-uefifcoe.sh b/modules.d/95fcoe/parse-uefifcoe.sh
new file mode 100755
index 0000000..e03bcb3
--- /dev/null
+++ b/modules.d/95fcoe/parse-uefifcoe.sh
@@ -0,0 +1,35 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+command -v getarg >/dev/null          || . /lib/dracut-lib.sh
+command -v get_fcoe_boot_mac >/dev/null || . /lib/uefi-lib.sh
+command -v set_ifname >/dev/null || . /lib/net-lib.sh
+
+print_fcoe_uefi_conf()
+{
+    local mac dev vlan
+    mac=$(get_fcoe_boot_mac)
+    [ -z "$mac" ] && continue
+    dev=$(set_ifname fcoe $mac)
+    vlan=$(get_fcoe_boot_vlan)
+    if [ "$vlan" -ne "0" ]; then
+        case "$vlan" in
+            [0-9]*)
+                printf "%s\n" "vlan=$dev.$vlan:$dev"
+                dev="$dev.$vlan"
+                ;;
+            *)
+                printf "%s\n" "vlan=$vlan:$dev"
+                dev="$vlan"
+                ;;
+        esac
+    fi
+    # fcoe=eth0:nodcb
+    printf "%s\n" "$dev:nodcb"
+}
+
+
+if [ -e /sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data ]; then
+    print_fcoe_uefi_conf > /etc/cmdline.d/40-fcoe-uefi.conf
+fi
diff --git a/modules.d/99base/module-setup.sh b/modules.d/99base/module-setup.sh
index 52ce400..d33a0fb 100755
--- a/modules.d/99base/module-setup.sh
+++ b/modules.d/99base/module-setup.sh
@@ -42,6 +42,7 @@ install() {
     mkdir -p ${initdir}/tmp
 
     inst_simple "$moddir/dracut-lib.sh" "/lib/dracut-lib.sh"
+    inst_simple "$moddir/uefi-lib.sh" "/lib/uefi-lib.sh"
 
     if ! dracut_module_included "systemd"; then
         inst_multiple switch_root || dfatal "Failed to install switch_root"
diff --git a/modules.d/99base/uefi-lib.sh b/modules.d/99base/uefi-lib.sh
new file mode 100755
index 0000000..faedbac
--- /dev/null
+++ b/modules.d/99base/uefi-lib.sh
@@ -0,0 +1,155 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+#
+# Copyright 2013 Red Hat, Inc.  All rights reserved.
+# Copyright 2013 Harald Hoyer <harald@redhat.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+getbyte () {
+    local IFS= LC_CTYPE=C res c
+    read -r -n 1 -d '' c
+    res=$?
+    # the single quote in the argument of the printf
+    # yields the numeric value of $c (ASCII since LC_CTYPE=C)
+    [[ -n $c ]] && c=$(printf '%u' "'$c") || c=0
+    printf "$c"
+    return $res
+}
+
+getword () {
+    local b1 b2 val
+    b1=$(getbyte) || return 1
+    b2=$(getbyte) || return 1
+    (( val = b2 * 256 + b1 ))
+    echo $val
+    return 0
+}
+
+# Acpi(PNP0A08,0x0)/Pci(0x3,0x0)/Pci(0x0,0x0)/MAC(90E2BA265ED4,0x0)/Vlan(172)/Fibre(0x4EA06104A0CC0050,0x0)
+uefi_device_path()
+{
+    local IFS= LC_CTYPE=C res tt len type hextype first
+    first=1
+
+    while :; do
+        type=$(getbyte) || return 1
+        subtype=$(getbyte) || return 1
+        len=$(getword) || return 1
+        hextype=$(printf "%02x%02x" "$type" "$subtype")
+        if [[ $first == 1 ]]; then
+            first=0
+        elif [[ $hextype != "7fff" ]]; then
+            printf "/"
+        fi
+        case $hextype in
+            0101)
+                # PCI
+                tt=$(getword)
+                printf "PCI(0x%x,0x%x)" $(($tt / 256)) $(($tt & 255))
+                ;;
+            0201)
+                # ACPI
+                printf "Acpi(0x%x,0x%x)" $(($(getword) + $(getword) * 65536)) $(($(getword) + $(getword) * 65536))
+                ;;
+            0303)
+                # FIBRE
+                getword &>/dev/null
+                getword &>/dev/null
+                printf "Fibre(0x%x%x%x%x%x%x%x%x,0x%x)" \
+                    $(getbyte) $(getbyte) $(getbyte) $(getbyte) \
+                    $(getbyte) $(getbyte) $(getbyte) $(getbyte) \
+                    $(( $(getword) + $(getword) * 65536 + 4294967296 * ( $(getword) + $(getword) * 65536 ) ))
+                ;;
+            030b)
+                # MAC
+                printf "MAC(%02x%02x%02x%02x%02x%02x," $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
+                read -r -N 26  tt || return 1
+                printf "0x%x)"  $(getbyte)
+                ;;
+            0314)
+                # VLAN
+                printf "VLAN(%d)" $(getword)
+                ;;
+            7fff)
+                # END
+                printf "\n"
+                return 0
+                ;;
+            *)
+                printf "Unknown(Type:%d SubType:%d len=%d)" "$type" "$subtype" "$len"
+                read -r -N $(($len-4))  tt || return 1
+                ;;
+        esac
+    done
+}
+
+get_fcoe_boot_mac()
+{
+    data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
+    [ -f $data ] || return 1
+    local IFS= LC_CTYPE=C tt len type hextype
+    first=1
+
+    while :; do
+        type=$(getbyte) || return 1
+        subtype=$(getbyte) || return 1
+        len=$(getword) || return 1
+        hextype=$(printf "%02x%02x" "$type" "$subtype")
+        case $hextype in
+            030b)
+                # MAC
+                printf "%02x:%02x:%02x:%02x:%02x:%02x" $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
+                read -r -N 27  tt || return 1
+                ;;
+            7fff)
+                # END
+                return 0
+                ;;
+            *)
+                read -r -N $(($len-4))  tt || return 1
+                ;;
+        esac
+    done < $data
+}
+
+get_fcoe_boot_vlan()
+{
+    data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
+    [ -f $data ] || return 1
+    local IFS= LC_CTYPE=C tt len type hextype
+    first=1
+
+    while :; do
+        type=$(getbyte) || return 1
+        subtype=$(getbyte) || return 1
+        len=$(getword) || return 1
+        hextype=$(printf "%02x%02x" "$type" "$subtype")
+        case $hextype in
+            0314)
+                # VLAN
+                printf "%d" $(getword)
+                ;;
+            7fff)
+                # END
+                return 0
+                ;;
+            *)
+                read -r -N $(($len-4))  tt || return 1
+                ;;
+        esac
+    done < $data
+}