[qemu] Use xenstore to configure ioemu block devices.

- read ioemu block device config from xenstore
- don't require the ioemu: prefix on block devices any longer
- allow change of media associated with cdrom drives
- replace cdrom= option by :cdrom suffix on regular block device config:
  'file:/root/mytest.iso,hdc:cdrom,r'
- don't create default cdrom drive anymore - to create default empty
  cdrom drive use: ',hdc:cdrom,r'

Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/ioemu/block.c b/tools/ioemu/block.c
index b908167186..9c628f93bf 100644
--- a/tools/ioemu/block.c
+++ b/tools/ioemu/block.c
@@ -750,6 +750,7 @@ static int raw_write(BlockDriverState *bs, int64_t sector_num,
 static void raw_close(BlockDriverState *bs)
 {
     BDRVRawState *s = bs->opaque;
+    bs->total_sectors = 0;
     close(s->fd);
 }