diff options
| author | Fam Zheng <famz@redhat.com> | 2014-10-19 12:47:42 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-10-23 16:41:22 +0200 |
| commit | 3e2b2a9c49f44926b995495be5e94e61e4f29f5e (patch) | |
| tree | 0e637dd056123a66c2c8eaed854e97c8cd894808 /hw/scsi/virtio-scsi-dataplane.c | |
| parent | e40830afa1cff3ffdc37bdfdd40d80860074636c (diff) | |
virtio-scsi-dataplane: Add op blocker
We need this to protect dataplane thread from race conditions with block
jobs until the latter is made dataplane-safe.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi/virtio-scsi-dataplane.c')
| -rw-r--r-- | hw/scsi/virtio-scsi-dataplane.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c index 48dcfd2852..1f77635774 100644 --- a/hw/scsi/virtio-scsi-dataplane.c +++ b/hw/scsi/virtio-scsi-dataplane.c @@ -155,6 +155,8 @@ void virtio_scsi_dataplane_start(VirtIOSCSI *s) s->dataplane_starting = true; + assert(!s->blocker); + error_setg(&s->blocker, "block device is in use by data plane"); /* Set up guest notifier (irq) */ rc = k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, true); if (rc != 0) { @@ -195,6 +197,8 @@ void virtio_scsi_dataplane_stop(VirtIOSCSI *s) if (!s->dataplane_started || s->dataplane_stopping) { return; } + error_free(s->blocker); + s->blocker = NULL; s->dataplane_stopping = true; assert(s->ctx == iothread_get_aio_context(vs->conf.iothread)); |