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virtio-bus: have callers tolerate new host notifier api

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Have vhost and dataplane use the new api for transports that
have been converted.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Cornelia Huck 2016-06-10 11:04:10 +02:00 • committed by Michael S. Tsirkin
parent 6798e245a3
commit b1f0a33d80
3 changed files with 42 additions and 12 deletions
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20
hw/scsi/virtio-scsi-dataplane.c
View file

@ -31,7 +31,8 @@ void virtio_scsi_set_iothread(VirtIOSCSI *s, IOThread *iothread)
s->ctx = iothread_get_aio_context(vs->conf.iothread);
/* Don't try if transport does not support notifiers. */
if (!k->set_guest_notifiers || !k->set_host_notifier) {
if (!k->set_guest_notifiers ||
(!k->set_host_notifier && !k->ioeventfd_started)) {
fprintf(stderr, "virtio-scsi: Failed to set iothread "
"(transport does not support notifiers)");
exit(1);
@ -73,7 +74,10 @@ static int virtio_scsi_vring_init(VirtIOSCSI *s, VirtQueue *vq, int n,
int rc;
/* Set up virtqueue notify */
rc = k->set_host_notifier(qbus->parent, n, true);
rc = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), n, true);
if (rc == -ENOSYS) {
rc = k->set_host_notifier(qbus->parent, n, true);
}
if (rc != 0) {
fprintf(stderr, "virtio-scsi: Failed to set host notifier (%d)\n",
rc);
@ -159,7 +163,10 @@ fail_vrings:
virtio_scsi_clear_aio(s);
aio_context_release(s->ctx);
for (i = 0; i < vs->conf.num_queues + 2; i++) {
k->set_host_notifier(qbus->parent, i, false);
rc = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
if (rc == -ENOSYS) {
k->set_host_notifier(qbus->parent, i, false);
}
}
k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, false);
fail_guest_notifiers:
@ -174,7 +181,7 @@ void virtio_scsi_dataplane_stop(VirtIOSCSI *s)
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s)));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
int i;
int i, rc;
if (!s->dataplane_started || s->dataplane_stopping) {
return;
@ -198,7 +205,10 @@ void virtio_scsi_dataplane_stop(VirtIOSCSI *s)
aio_context_release(s->ctx);
for (i = 0; i < vs->conf.num_queues + 2; i++) {
k->set_host_notifier(qbus->parent, i, false);
rc = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
if (rc == -ENOSYS) {
k->set_host_notifier(qbus->parent, i, false);
}
}
/* Clean up guest notifier (irq) */