[Xen-devel] [PATCH] Fix losetup -f not working on SLES10

[Gary Grebus <Gary.Grebus@xxxxxxxxxx>]

Andre,

Does this fix the problem for you?

        /gary


Signed-off-by: Gary Grebus <gary.grebus@xxxxxxxxxx>

diff -r b928797213ac tools/hotplug/Linux/block
--- a/tools/hotplug/Linux/block Fri Dec 11 09:17:09 2009 +0000
+++ b/tools/hotplug/Linux/block Fri Dec 11 15:44:43 2009 -0500
@@ -16,6 +16,26 @@
   echo -n $dev
 }

+find_free_loopback_helper() {
+  local next_devnum=0
+  local busy_devnum
+  while read busy_devnum; do
+    if [ "$next_devnum" != "$busy_devnum" ]; then
+      break
+    fi
+    let next_devnum=$next_devnum+1
+  done
+  echo "/dev/loop${next_devnum}"
+}
+
+# Not all distros have "losetup -f"
+find_free_loopback_dev() {
+  local loopdev
+  loopdev=$(losetup -a | sed -e 's+^/dev/loop++' -e 's/:.*//' | 
find_free_loopback_helper)
+  if [ -n "$loopdev" ] && [ -b "$loopdev" ]; then
+    echo "$loopdev"
+  fi
+}

 ##
 # check_sharing device mode
@@ -270,7 +290,7 @@
           done
         fi

-        loopdev=$(losetup -f)
+        loopdev=$(find_free_loopback_dev)
         if [ "$loopdev" = '' ]
         then
           release_lock "block"

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