qemu/xen-add-block-resize-support-for-xen-dis.patch

From: Bruce Rogers <brogers@suse.com>
Date: Wed, 16 Jan 2019 16:29:36 -0700
Subject: xen: add block resize support for xen disks

Provide monitor naming of xen disks, and plumb guest driver
notification through xenstore of resizing instigated via the
monitor.

[BR: minor edits to pass qemu's checkpatch script]
[BR: significant rework needed due to upstream xen disk qdevification]
[BR: At this point, monitor_add_blk call is all we need to add!]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/block/xen-block.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/block/xen-block.c b/hw/block/xen-block.c
index 581f1d5f7a1a2ec3d9b5f7bfe2aa..9076221c0f995e622ecfbb0408c1 100644
--- a/hw/block/xen-block.c
+++ b/hw/block/xen-block.c
@@ -271,6 +271,9 @@ static void xen_block_realize(XenDevice *xendev, Error **errp)
 
     xen_block_set_size(blockdev);
 
+    if (!monitor_add_blk(conf->blk, blockdev->drive->id, errp)) {
+        return;
+    }
     blockdev->dataplane =
         xen_block_dataplane_create(xendev, blk, conf->logical_block_size,
                                    blockdev->props.iothread);