1 files changed, 43 insertions, 0 deletions
diff --git a/modules.d/95dasd_rules/parse-dasd.sh b/modules.d/95dasd_rules/parse-dasd.sh
new file mode 100755
index 0000000..4454aec
--- /dev/null
+++ b/modules.d/95dasd_rules/parse-dasd.sh
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+allow_device() {
+    local ccw=$1
+
+    if [ -x /sbin/cio_ignore ] && cio_ignore -i "$ccw" > /dev/null; then
+        cio_ignore -r "$ccw"
+    fi
+}
+
+if [[ -f /sys/firmware/ipl/ipl_type ]] && [[ $(< /sys/firmware/ipl/ipl_type) == "ccw" ]]; then
+    allow_device "$(< /sys/firmware/ipl/device)"
+fi
+
+for dasd_arg in $(getargs root=) $(getargs resume=); do
+    [[ $dasd_arg =~ /dev/disk/by-path/ccw-* ]] || continue
+
+    ccw_dev="${dasd_arg##*/ccw-}"
+    allow_device "${ccw_dev%%-*}"
+done
+
+for dasd_arg in $(getargs rd.dasd=); do
+    IFS=',' read -r -a devs <<< "$dasd_arg"
+    declare -p devs
+    for dev in "${devs[@]}"; do
+        case "$dev" in
+            autodetect | probeonly) ;;
+
+            *-*)
+                IFS="-" read -r start end _ <<< "${dev%(ro)}"
+                prefix=${start%.*}
+                start=${start##*.}
+                for rdev in $(seq $((16#$start)) $((16#$end))); do
+                    allow_device "$(printf "%s.%04x" "$prefix" "$rdev")"
+                done
+                ;;
+            *)
+                IFS="." read -r sid ssid chan _ <<< "${dev%(ro)}"
+                allow_device "$(printf "%01x.%01x.%04x" $((16#$sid)) $((16#$ssid)) $((16#$chan)))"
+                ;;
+        esac
+    done
+done