Ryan Grimm
2006-Aug-25 21:24 UTC
[Xen-devel] [PATCH 6 of 6] dm-userspace backend script and xmexample change
Signed-off-by: Ryan Grimm <grimm@us.ibm.com>
Signed-off-by: Dan Smith <danms@us.ibm.com>
# HG changeset patch
# User Ryan Grimm <grimm@us.ibm.com>
# Date 1156536098 18000
# Node ID 55e3795e5bc46ea6a205e60ebf27ed9faf306616
# Parent be4574d288030b64d4623dd33505d0990185a6b9
dm-userspace backend script and xmexample change
diff -r be4574d28803 -r 55e3795e5bc4 tools/examples/Makefile
--- a/tools/examples/Makefile Fri Aug 25 15:01:36 2006 -0500
+++ b/tools/examples/Makefile Fri Aug 25 15:01:38 2006 -0500
@@ -32,6 +32,7 @@ XEN_SCRIPTS += vtpm vtpm-delete
XEN_SCRIPTS += vtpm vtpm-delete
XEN_SCRIPTS += xen-hotplug-cleanup
XEN_SCRIPTS += external-device-migrate
+XEN_SCRIPTS += block-dmu
XEN_SCRIPT_DATA = xen-script-common.sh locking.sh logging.sh
XEN_SCRIPT_DATA += xen-hotplug-common.sh xen-network-common.sh vif-common.sh
XEN_SCRIPT_DATA += block-common.sh vtpm-common.sh vtpm-hotplug-common.sh
diff -r be4574d28803 -r 55e3795e5bc4 tools/examples/README
--- a/tools/examples/README Fri Aug 25 15:01:36 2006 -0500
+++ b/tools/examples/README Fri Aug 25 15:01:38 2006 -0500
@@ -13,6 +13,7 @@ block-common.sh - sourced by block,
block-common.sh - sourced by block, block-*
block-enbd - binds/unbinds network block devices
block-nbd - binds/unbinds network block devices
+block-dmu - binds/unbinds dm-userspace devices
external-device-migrate - called by xend for migrating external devices
locking.sh - locking functions to prevent concurrent access to
critical sections inside script files
diff -r be4574d28803 -r 55e3795e5bc4 tools/examples/xmexample1
--- a/tools/examples/xmexample1 Fri Aug 25 15:01:36 2006 -0500
+++ b/tools/examples/xmexample1 Fri Aug 25 15:01:38 2006 -0500
@@ -64,6 +64,13 @@ vif = [ '''' ]
# and MODE is r for read-only, w for read-write.
disk = [ ''phy:hda1,hda1,w'' ]
+
+#----------------------------------------------------------------------------
+# Using a dm-userspace backed device
+# for dmu, the syntax is dmu:<plugin>:<cow file>:<base file>
+# if <cow file> does not exist, it is created and <base file> is
used
+# as a base. if <cow file> does exist, <base file> is ignored.
+# disk = [
''dmu:dscow:/path/to/domain.dscow:/path/to/domain.img,hda1,w'']
#----------------------------------------------------------------------------
# Define to which TPM instance the user domain should communicate.
diff -r be4574d28803 -r 55e3795e5bc4 tools/examples/block-dmu
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/examples/block-dmu Fri Aug 25 15:01:38 2006 -0500
@@ -0,0 +1,57 @@
+#!/bin/sh
+#
+# Copyright (C) International Business Machines Corp., 2006
+# Author: Ryan Grimm <grimm@us.ibm.com>
+
+dir=$(dirname "$0")
+. "$dir/block-common.sh"
+
+p=$(xenstore_read "$XENBUS_PATH/params")
+mode=$(xenstore_read "$XENBUS_PATH/mode")
+
+wait_for_cowd_exit() {
+ while ps ax | grep -v grep | grep cowd | grep -q $1; do
+ sleep 1
+ done
+}
+
+case "$command" in
+ add)
+ plugin=$(echo $p | cut -d: -f1)
+ dmu_file=$(echo $p | cut -d: -f2)
+ base_file=$(echo $p | cut -d: -f3)
+
+ domain_name=$(xenstore_read "$XENBUS_PATH/domain")
+ domain_dev=$(xenstore_read "$XENBUS_PATH/dev")
+ target="$domain_name""_""$domain_dev"
+ md_dev="/dev/mapper/$target"
+
+ lsmod | grep -q dm_user || modprobe dm-user || fatal \
+ ''cannot load module dm-user''
+
+ wait_for_cowd_exit $target
+
+ if [ ! -e $dmu_file ]
+ then
+ dscow_tool -c $dmu_file $base_file || fatal \
+ ''creation of $dmu_file failed''
+ fi
+
+ cowd --sync --pidfile=/var/run/cowd.$target.pid -p $plugin \
+ $target $dmu_file || fatal ''cowd failed''
+
+ xenstore_write "$XENBUS_PATH/node" "$target"
+
+ claim_lock "block"
+ write_dev $md_dev
+ release_lock "block"
+ exit 0
+ ;;
+
+ remove)
+ node=$(xenstore_read "$XENBUS_PATH/node")
+ cowd_pid=$(cat "/var/run/cowd.$node.pid")
+ kill $cowd_pid
+ exit 0
+ ;;
+esac
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