From bfa1db78cdcf6aaea09da560b578426fe663a05e Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Fri, 29 Nov 2013 13:13:47 +0100
Subject: [PATCH] Add DASD configuration for SuSE

On SuSE the DASD configuration is kept in udev rules, one rule
file per device. So add a new module for copying and creating
these rules during boot.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 dracut-functions.sh                    | 28 +++++++++++++++++
 modules.d/95dasd_rules/module-setup.sh | 27 ++++++++++++++++
 modules.d/95dasd_rules/parse-dasd.sh   | 56 ++++++++++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100755 modules.d/95dasd_rules/module-setup.sh
 create mode 100755 modules.d/95dasd_rules/parse-dasd.sh

diff --git a/dracut-functions.sh b/dracut-functions.sh
index 04f4fea..7cfa097 100755
--- a/dracut-functions.sh
+++ b/dracut-functions.sh
@@ -899,6 +899,34 @@ inst_rules() {
     done
 }
 
+inst_rules_wildcard() {
+    local _target=/etc/udev/rules.d _rule _found
+
+    inst_dir "${udevdir}/rules.d"
+    inst_dir "$_target"
+    for _rule in ${udevdir}/rules.d/$1 ${dracutbasedir}/rules.d/$1 ; do
+        if [[ -e $_rule ]]; then
+            inst_rule_programs "$_rule"
+            inst_rule_group_owner "$_rule"
+            inst_rule_initqueue "$_rule"
+            inst_simple "$_rule"
+            _found=$_rule
+        fi
+    done
+    if [ -n ${hostonly} ] ; then
+        for _rule in ${_target}/$1 ; do
+            if [[ -f $_rule ]]; then
+                inst_rule_programs "$_rule"
+                inst_rule_group_owner "$_rule"
+                inst_rule_initqueue "$_rule"
+                inst_simple "$_rule"
+                _found=$_rule
+            fi
+        done
+    fi
+    [[ $_found ]] || dinfo "Skipping udev rule: $_rule"
+}
+
 prepare_udev_rules() {
     [ -z "$UDEVVERSION" ] && export UDEVVERSION=$(udevadm --version)
 
diff --git a/modules.d/95dasd_rules/module-setup.sh b/modules.d/95dasd_rules/module-setup.sh
new file mode 100755
index 0000000..d313171
--- /dev/null
+++ b/modules.d/95dasd_rules/module-setup.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+# called by dracut
+check() {
+    local _arch=$(uname -m)
+    [ -x /sbin/dasd_configure ] || return 1
+    [ "$_arch" = "s390" -o "$_arch" = "s390x" ] || return 1
+    return 0
+}
+
+# called by dracut
+depends() {
+    echo 'dasd_mod'
+    return 0
+}
+
+# called by dracut
+install() {
+    inst_multiple /usr/lib/udev/collect
+    inst_hook cmdline 30 "$moddir/parse-dasd.sh"
+    if [[ $hostonly ]] ; then
+        inst_rules_wildcard 51-dasd-*.rules
+    fi
+    inst_rules 59-dasd.rules
+}
diff --git a/modules.d/95dasd_rules/parse-dasd.sh b/modules.d/95dasd_rules/parse-dasd.sh
new file mode 100755
index 0000000..9389c44
--- /dev/null
+++ b/modules.d/95dasd_rules/parse-dasd.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+
+create_udev_rule() {
+    local ccw=$1
+    local _drv _cu_type _dev_type
+    local _rule=/etc/udev/rules.d/51-dasd-${ccw}.rules
+
+    if [ -e /sys/bus/ccw/devices/${ccw} ] ; then
+        read _cu_type < /sys/bus/ccw/devices/${ccw}/cutype
+        read _dev_type < /sys/bus/ccw/devices/${ccw}/devtype
+    fi
+    case "$_cu_type" in
+    3990/*|2105/*|2107/*|1750/*|9343/*)
+            _drv=dasd-eckd
+            ;;
+    6310/*)
+            _drv=dasd-fba
+            ;;
+    3880/*)
+        case "$_dev_type" in
+            3380/*)
+                _drv=dasd_eckd
+                ;;
+            3370/*)
+                _drv=dasd-fba
+                ;;
+        esac
+        ;;
+    esac
+    [ -z "${_drv}" ] && return 0
+
+    [ -e ${_rule} ] && return 0
+
+    cat > $_rule <<EOF
+ACTION=="add", SUBSYSTEM=="ccw", KERNEL=="$ccw", IMPORT{program}="collect $ccw %k ${ccw} $_drv"
+ACTION=="add", SUBSYSTEM=="drivers", KERNEL=="$_drv", IMPORT{program}="collect $ccw %k ${ccw} $_drv"
+ACTION=="add", ENV{COLLECT_$ccw}=="0", ATTR{[ccw/$ccw]online}="1"
+EOF
+}
+
+for dasd_arg in $(getargs root=) $(getargs resume=); do
+    (
+        case $dasd_arg in
+            /dev/disk/by-path/ccw-*)
+                ccw_arg=${dasd_arg##*/}
+                break;
+        esac
+        if [ -n "$ccw_arg" ] ; then
+            IFS="-"
+            set -- $ccw_arg
+            create_udev_rule $2
+        fi
+    )
+done