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