From a8a1d48e4ccc545e7f50d46beb32acd2833fd474 Mon Sep 17 00:00:00 2001
From: "emellor@leeni.uk.xensource.com" <emellor@leeni.uk.xensource.com>
Date: Wed, 26 Oct 2005 14:58:13 +0100
Subject: [PATCH] Break the write_dev function out from block into new
 block-common.sh, where it can also be used by block-enbd and block-nbd.

Signed-off-by: Ewan Mellor <ewan@xensource.com>
---
 tools/examples/Makefile        |  3 +-
 tools/examples/block           | 16 ++---------
 tools/examples/block-common.sh | 51 ++++++++++++++++++++++++++++++++++
 tools/examples/block-enbd      | 14 +++-------
 tools/examples/block-nbd       | 18 ++++--------
 5 files changed, 64 insertions(+), 38 deletions(-)
 create mode 100644 tools/examples/block-common.sh

diff --git a/tools/examples/Makefile b/tools/examples/Makefile
index 2af687e535..54164235b4 100644
--- a/tools/examples/Makefile
+++ b/tools/examples/Makefile
@@ -24,8 +24,9 @@ XEN_SCRIPTS = network-bridge vif-bridge
 XEN_SCRIPTS += network-route vif-route
 XEN_SCRIPTS += network-nat vif-nat
 XEN_SCRIPTS += block
-XEN_SCRIPTS += block-enbd
+XEN_SCRIPTS += block-enbd block-nbd
 XEN_SCRIPTS += xen-hotplug-common.sh xen-network-common.sh vif-common.sh
+XEN_SCRIPTS += block-common.sh
 
 XEN_HOTPLUG_DIR = /etc/hotplug
 XEN_HOTPLUG_SCRIPTS = xen-backend.agent
diff --git a/tools/examples/block b/tools/examples/block
index 2e383bb3a6..c5b6b6c215 100644
--- a/tools/examples/block
+++ b/tools/examples/block
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 dir=$(dirname "$0")
-. "$dir/xen-hotplug-common.sh"
+. "$dir/block-common.sh"
 
 expand_dev() {
   local dev
@@ -16,21 +16,9 @@ expand_dev() {
   echo -n $dev
 }
 
-write_dev() {
-  local major
-  local minor
-  local pdev
-	
-  major=$(stat -L -c %t "$1")
-  minor=$(stat -L -c %T "$1")
-  pdev=$(printf "0x%02x%02x" 0x$major 0x$minor)
-  xenstore_write "$XENBUS_PATH"/physical-device $pdev \
-      "$XENBUS_PATH"/node $1
-}
-
 t=$(xenstore_read "$XENBUS_PATH"/type || true)
 
-case $1 in 
+case "$command" in 
   bind)
     p=$(xenstore_read "$XENBUS_PATH"/params)
     case $t in 
diff --git a/tools/examples/block-common.sh b/tools/examples/block-common.sh
new file mode 100644
index 0000000000..1d20550a9d
--- /dev/null
+++ b/tools/examples/block-common.sh
@@ -0,0 +1,51 @@
+#
+# Copyright (c) 2005 XenSource Ltd.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+
+dir=$(dirname "$0")
+. "$dir/xen-hotplug-common.sh"
+
+command="$1"
+
+if [ "$command" != "bind" ] && [ "$command" != "unbind" ]
+then
+  log err "Invalid command: $command"
+  exit 1
+fi
+
+
+XENBUS_PATH="${XENBUS_PATH:?}"
+
+
+##
+# Write physical-device = 0xMMmm and node = device to the store, where MM
+# and mm are the major and minor numbers of device.
+#
+# @param device The device from which major and minor numbers are read, which
+#               will be written into the store.
+#
+write_dev() {
+  local major
+  local minor
+  local pdev
+	
+  major=$(stat -L -c %t "$1")
+  minor=$(stat -L -c %T "$1")
+  pdev=$(printf "0x%02x%02x" "0x$major" "0x$minor")
+  xenstore_write "$XENBUS_PATH"/physical-device "$pdev" \
+                 "$XENBUS_PATH"/node "$1"
+}
diff --git a/tools/examples/block-enbd b/tools/examples/block-enbd
index c86068d817..c58adb595d 100755
--- a/tools/examples/block-enbd
+++ b/tools/examples/block-enbd
@@ -2,25 +2,19 @@
 
 # Usage: block-enbd [bind server ctl_port |unbind node]
 #
-# The file argument to the bind command is the file we are to bind to a
-# loop device.
-#
 # The node argument to unbind is the name of the device node we are to
 # unbind.
 #
 # This assumes you're running a correctly configured server at the other end!
 
-set -e
+dir=$(dirname "$0")
+. "$dir/block-common.sh"
 
-case $1 in
+case "$command" in
   bind)
     for dev in /dev/nd*; do
       if nbd-client $2:$3 $dev; then
-        major=$(stat -L -c %t "$dev")
-        minor=$(stat -L -c %T "$dev")
-        pdev=$(printf "0x%02x%02x" 0x$major 0x$minor)
-        xenstore-write "$XENBUS_PATH"/physical-device $pdev \
-          "$XENBUS_PATH"/node $dev
+        write_dev $dev
         exit 0
       fi
     done
diff --git a/tools/examples/block-nbd b/tools/examples/block-nbd
index 06f9f6875e..142a403c0f 100644
--- a/tools/examples/block-nbd
+++ b/tools/examples/block-nbd
@@ -1,28 +1,20 @@
 #!/bin/sh
 
-# Usage: block-enbd [bind server ctl_port |unbind node]
-#
-# The file argument to the bind command is the file we are to bind to a
-# loop device.
+# Usage: block-nbd [bind server ctl_port |unbind node]
 #
 # The node argument to unbind is the name of the device node we are to
 # unbind.
 #
 # This assumes you're running a correctly configured server at the other end!
 
-set -e
-
-#echo "block-enbd: $@" | logger -t xen
+dir=$(dirname "$0")
+. "$dir/block-common.sh"
 
-case $1 in
+case "$command" in
   bind)
     for dev in /dev/nbd*; do
       if nbd-client $2 $3 $dev; then
-        major=$(stat -L -c %t "$dev")
-        minor=$(stat -L -c %T "$dev")
-        pdev=$(printf "0x%02x%02x" 0x$major 0x$minor)
-        xenstore-write "$XENBUS_PATH"/physical-device $pdev \
-          "$XENBUS_PATH"/node $dev
+        write_dev $dev
         exit 0
       fi
     done
-- 
2.30.2