Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- vmdk: Support for blockdev-create
- block: Apply auto-read-only for ro-whitelist drivers
- virtio-scsi: Fixes related to attaching/detaching iothreads
- scsi-disk: Fixed erroneously detected multipath setup with multiple
  disks created with node-names. Added device_id property.
- block: Fix hangs in synchronous APIs with iothreads
- block: Fix invalidate_cache error path for parent activation
- block-backend, mirror, qcow2, vpc, vdi, qemu-iotests:
  Minor fixes and code improvements

# gpg: Signature made Fri 01 Feb 2019 15:23:10 GMT
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream: (27 commits)
  scsi-disk: Add device_id property
  scsi-disk: Don't use empty string as device id
  qtest.py: Wait for the result of qtest commands
  block: Fix invalidate_cache error path for parent activation
  iotests/236: fix transaction kwarg order
  iotests: Filter second BLOCK_JOB_ERROR from 229
  virtio-scsi: Forbid devices with different iothreads sharing a blockdev
  scsi-disk: Acquire the AioContext in scsi_*_realize()
  virtio-scsi: Move BlockBackend back to the main AioContext on unplug
  block: Eliminate the S_1KiB, S_2KiB, ... macros
  block: Remove blk_attach_dev_legacy() / legacy_dev code
  block: Apply auto-read-only for ro-whitelist drivers
  uuid: Make qemu_uuid_bswap() take and return a QemuUUID
  block/vdi: Don't take address of fields in packed structs
  block/vpc: Don't take address of fields in packed structs
  vmdk: Reject excess extents in blockdev-create
  iotests: Add VMDK tests for blockdev-create
  iotests: Filter cid numbers in VMDK extent info
  vmdk: Implement .bdrv_co_create callback
  vmdk: Refactor vmdk_create_extent
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 3aa99717e2..eb90288f47 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -791,9 +791,16 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
     SCSIDevice *sd = SCSI_DEVICE(dev);
 
     if (s->ctx && !s->dataplane_fenced) {
+        AioContext *ctx;
         if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
             return;
         }
+        ctx = blk_get_aio_context(sd->conf.blk);
+        if (ctx != s->ctx && ctx != qemu_get_aio_context()) {
+            error_setg(errp, "Cannot attach a blockdev that is using "
+                       "a different iothread");
+            return;
+        }
         virtio_scsi_acquire(s);
         blk_set_aio_context(sd->conf.blk, s->ctx);
         virtio_scsi_release(s);
@@ -824,6 +831,12 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev,
         virtio_scsi_release(s);
     }
 
+    if (s->ctx) {
+        virtio_scsi_acquire(s);
+        blk_set_aio_context(sd->conf.blk, qemu_get_aio_context());
+        virtio_scsi_release(s);
+    }
+
     qdev_simple_device_unplug_cb(hotplug_dev, dev, errp);
 }