commit 3255d1c21f364774390061fbc3b8e25c027cc862
author Stefan Hajnoczi <stefanha@redhat.com> Mon Aug 18 16:07:13 2014 +0100
committer Stefan Hajnoczi <stefanha@redhat.com> Fri Aug 29 16:01:48 2014 +0100
tree a03b99470af3b48cd5c249b7326211f86ce9eed9
parent 8ad4202bf61bc1d124ff26016cfe17cb261cc392

virtio-blk: allow drive_del with dataplane

Now that drive_del acquires the AioContext we can safely allow deleting
the drive.  As with non-dataplane mode, all I/Os submitted by the guest
after drive_del will return EIO.

This patch makes hot unplug work with virtio-blk dataplane.  Previously
drive_del reported an error because the device was busy.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

hw/block/dataplane/virtio-blk.c

diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index c07adc6..b55188c 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -194,6 +194,7 @@
     error_setg(&s->blocker, "block device is in use by data plane");
     bdrv_op_block_all(blk->conf.bs, s->blocker);
     bdrv_op_unblock(blk->conf.bs, BLOCK_OP_TYPE_RESIZE, s->blocker);
+    bdrv_op_unblock(blk->conf.bs, BLOCK_OP_TYPE_DRIVE_DEL, s->blocker);
 
     *dataplane = s;
 }