From 2afae8c7d44a043e36038d5f6f600034ad2b2aca Mon Sep 17 00:00:00 2001 From: Kevin Shanahan Date: Fri, 21 Sep 2012 08:50:22 +0930 Subject: [PATCH] blockdev: preserve readonly and snapshot states across media changes If readonly=on is given at device creation time, the ->readonly flag needs to be set in the block driver state for this device so that readonly-ness is preserved across media changes (qmp change command). Similarly, to preserve the snapshot property requires ->open_flags to be correct. Signed-off-by: Kevin Shanahan Signed-off-by: Kevin Wolf (cherry picked from commit 80dd1aae3657a902d262f5d20a7a3c655b23705e) Signed-off-by: Michael Roth --- blockdev.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/blockdev.c b/blockdev.c index 4a5266e..9ba3503 100644 --- a/blockdev.c +++ b/blockdev.c @@ -533,6 +533,8 @@ DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) if_name[type], mediastr, unit_id); } dinfo->bdrv = bdrv_new(dinfo->id); + dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; + dinfo->bdrv->read_only = ro; dinfo->devaddr = devaddr; dinfo->type = type; dinfo->bus = bus_id; -- 1.7.12.1