stubdom: fix read-only disks access
There is no need for a flush on read-only disks. It would actually even
error out and disturb the guest.
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
diff -r 3dedb6209991 tools/ioemu/block-vbd.c
--- a/tools/ioemu/block-vbd.c Fri Aug 01 12:18:02 2008 +0100
+++ b/tools/ioemu/block-vbd.c Fri Aug 01 19:16:52 2008 +0100
@@ -273,6 +273,10 @@ static BlockDriverAIOCB *vbd_aio_flush(B
 BDRVVbdState *s = bs->opaque;
 VbdAIOCB *acb = NULL;
 
+ if (s->info.mode == O_RDONLY) {
+ cb(opaque, 0);
+ return NULL;
+ }
 if (s->info.barrier == 1) {
 acb = vbd_aio_setup(bs, 0, NULL, 0,
 s->info.flush == 1 ? vbd_nop_cb : cb, opaque);
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