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block-backend: Remember if attached device is non-qdev

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Almost all block devices are qdevified by now. This allows us to go back
from the BlockBackend to the DeviceState. xen_disk is the last device
that is missing. We'll remember in the BlockBackend if a xen_disk is
attached and can then disable any features that require going from a BB
to the DeviceState.

While at it, clearly mark the function used by xen_disk as legacy even
in its name, not just in TODO comments.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-09-29 18:47:03 +02:00
parent 2bf7e10f78
commit bbc8ea98bc
3 changed files with 23 additions and 11 deletions
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2
hw/block/xen_disk.c
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@ -1079,7 +1079,7 @@ static int blk_connect(struct XenDevice *xendev)
* so we can blk_unref() unconditionally */
blk_ref(blkdev->blk);
}
blk_attach_dev_nofail(blkdev->blk, blkdev);
blk_attach_dev_legacy(blkdev->blk, blkdev);
blkdev->file_size = blk_getlength(blkdev->blk);
if (blkdev->file_size < 0) {
BlockDriverState *bs = blk_bs(blkdev->blk);