initial import

1 files changed, 128 insertions, 0 deletions

diff --git a/device_cio_free b/device_cio_free
new file mode 100644
index 0000000..0bfaa8a
--- /dev/null
+++ b/device_cio_free
@@ -0,0 +1,128 @@
+#!/bin/sh
+#
+# Copyright 2009 Red Hat, Inc.
+# License: GPLv2
+# Author: Dan Horak <dhorak@redhat.com>
+#
+# unblock devices listed in various config files
+#
+# it uses dasd and zfcp config file
+# config file syntax:
+# deviceno   options
+# or
+# deviceno   WWPN   FCPLUN
+#
+# also processes the system ccw config file and network interface configurations
+#
+
+DASDCONFIG=/etc/dasd.conf
+ZFCPCONFIG=/etc/zfcp.conf
+ZNETCONFIG=/etc/ccw.conf
+BLACKLIST=/proc/cio_ignore
+VERBOSE=
+PATH=/bin:/usr/bin:/sbin:/usr/sbin
+
+usage()
+{
+    echo "$0 [-h|--help] [-V|--verbose]"
+    exit 1
+}
+
+# check how we were called
+case $(basename "$0") in
+    "dasd_cio_free")
+        CONFIG=$DASDCONFIG
+	MODE=dasd
+	;;
+    "zfcp_cio_free")
+        CONFIG=$ZFCPCONFIG
+        MODE=zfcp
+        ;;
+    "znet_cio_free")
+        CONFIG=$ZNETCONFIG
+        MODE=znet
+        ;;
+    *)
+	echo "Error: unknown alias '$CMD'."
+	echo "Supported aliases are dasd_cio_free, zfcp_cio_free and znet_cio_free."
+	exit 1
+	;;
+esac
+
+# process command line options
+if [ $# -gt 0 ]; then
+    case $1 in
+	-V|--verbose)
+	    VERBOSE=yes
+	    shift
+	    ;;
+	-h|--help)
+	    usage
+	    ;;
+	*)
+	    echo "Error: unknown option $1"
+	    usage
+	    ;;
+    esac
+fi
+
+if [ ! -f $BLACKLIST ]; then
+    echo "Error: $BLACKLIST kernel interface doesn't exist"
+    exit 2
+fi
+
+if [ $MODE = "dasd" -o $MODE = "zfcp" ]; then
+    # process the config file
+    if [ -f "$CONFIG" ]; then
+        tr "A-Z" "a-z" < $CONFIG | while read line; do
+	    case $line in
+		\#*) ;;
+		*)
+		    [ -z "$line" ] && continue
+		    set $line
+		    DEVICE=$1
+		    [ $VERBOSE ] && echo "Freeing device $DEVICE"
+		    echo "free $DEVICE" > $BLACKLIST 2> /dev/null || echo "Error: can't free device $DEVICE"
+		    ;;
+	    esac
+	done
+    fi
+fi
+
+if [ $MODE = "dasd" ]; then
+    # process the device list defined as option for the dasd module
+    DEVICES=$(modprobe --showconfig | grep "options[[:space:]]\+dasd_mod" | \
+	sed -e 's/.*[[:space:]]dasd=\([^[:space:]]*\).*/\1/' -e 's/([^)]*)//g' \
+	-e 's/nopav\|nofcx\|autodetect\|probeonly//g' -e 's/,,/,/g' -e 's/^,//' -e 's/,$//' | tr "A-Z" "a-z")
+
+    [ $VERBOSE ] && echo "Freeing device(s) $DEVICES"
+    echo "free $DEVICES" > $BLACKLIST 2> /dev/null  || echo "Error: can't free device(s) $DEVICES"
+fi
+
+if [ $MODE = "znet" ]; then
+    # process the config file
+    if [ -f "$CONFIG" ]; then
+        tr "A-Z" "a-z" < $CONFIG | while read line; do
+	    case $line in
+		\#*) ;;
+		*)
+		    [ -z "$line" ] && continue
+		    # grep 2 or 3 channels from beginning of each line
+		    DEVICES=$(echo $line | egrep -o "^([0-9]\.[0-9]\.[a-f0-9]+,){1,2}([0-9]\.[0-9]\.[a-f0-9]+)")
+		    if [ $DEVICES ]; then
+			[ $VERBOSE ] && echo "Freeing device(s) $DEVICES"
+			echo "free $DEVICES" > $BLACKLIST 2> /dev/null || echo "Error: can't free device(s) $DEVICES"
+		    fi
+		    ;;
+	    esac
+	done
+    fi
+    # process channels from network interface configurations
+    for line in $(egrep -i -h "^[[:space:]]*SUBCHANNELS=['\"]?([0-9]\.[0-9]\.[a-f0-9]+,){1,2}([0-9]\.[0-9]\.[a-f0-9]+)['\"]?([[:space:]]+#|[[:space:]]*$)" /etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null)
+    do
+	eval "$line"
+	DEVICES=$(echo $SUBCHANNELS | tr "A-Z" "a-z")
+        [ $VERBOSE ] && echo "Freeing device(s) $DEVICES"
+        echo "free $DEVICES" > $BLACKLIST 2> /dev/null  || echo "Error: can't free device(s) $DEVICES"
+    done
+fi