From c5c5a831765f5b18e36543bab1614d7d63b0bbee Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Mon, 4 Aug 2008 11:07:17 +0100 Subject: [PATCH] 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 --- tools/ioemu/block-vbd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/ioemu/block-vbd.c b/tools/ioemu/block-vbd.c index a3465b748a..58015bdf00 100644 --- a/tools/ioemu/block-vbd.c +++ b/tools/ioemu/block-vbd.c @@ -273,6 +273,10 @@ static BlockDriverAIOCB *vbd_aio_flush(BlockDriverState *bs, 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); -- 2.30.2