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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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10
hw/block/dataplane/virtio-blk.c
View File

@ -79,7 +79,8 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf,
}
/* 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)) {
error_setg(errp,
"device is incompatible with dataplane "
"(transport does not support notifiers)");
@ -157,7 +158,10 @@ void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s)
s->guest_notifier = virtio_queue_get_guest_notifier(s->vq);
/* Set up virtqueue notify */
r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), 0, true);
if (r == -ENOSYS) {
r = k->set_host_notifier(qbus->parent, 0, true);
}
if (r != 0) {
fprintf(stderr, "virtio-blk failed to set host notifier (%d)\n", r);
goto fail_host_notifier;
@ -193,6 +197,7 @@ void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s)
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(s->vdev)));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtIOBlock *vblk = VIRTIO_BLK(s->vdev);
int r;
if (!vblk->dataplane_started || s->stopping) {
return;
@ -217,7 +222,10 @@ void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s)
aio_context_release(s->ctx);
r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), 0, false);
if (r == -ENOSYS) {
k->set_host_notifier(qbus->parent, 0, false);
}
/* Clean up guest notifier (irq) */
k->set_guest_notifiers(qbus->parent, 1, false);

14
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 = 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);
@ -159,8 +163,11 @@ fail_vrings:
virtio_scsi_clear_aio(s);
aio_context_release(s->ctx);
for (i = 0; i < vs->conf.num_queues + 2; i++) {
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:
s->dataplane_fenced = true;
@ -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;
@ -198,8 +205,11 @@ void virtio_scsi_dataplane_stop(VirtIOSCSI *s)
aio_context_release(s->ctx);
for (i = 0; i < vs->conf.num_queues + 2; i++) {
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) */
k->set_guest_notifiers(qbus->parent, vs->conf.num_queues + 2, false);

14
hw/virtio/vhost.c
View File

@ -1110,14 +1110,18 @@ int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev)
VirtioBusState *vbus = VIRTIO_BUS(qbus);
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
int i, r, e;
if (!k->set_host_notifier) {
if (!k->set_host_notifier || !k->ioeventfd_started) {
fprintf(stderr, "binding does not support host notifiers\n");
r = -ENOSYS;
goto fail;
}
for (i = 0; i < hdev->nvqs; ++i) {
r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_index + i,
true);
if (r == -ENOSYS) {
r = k->set_host_notifier(qbus->parent, hdev->vq_index + i, true);
}
if (r < 0) {
fprintf(stderr, "vhost VQ %d notifier binding failed: %d\n", i, -r);
goto fail_vq;
@ -1127,7 +1131,11 @@ int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev)
return 0;
fail_vq:
while (--i >= 0) {
e = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_index + i,
false);
if (e == -ENOSYS) {
e = k->set_host_notifier(qbus->parent, hdev->vq_index + i, false);
}
if (e < 0) {
fprintf(stderr, "vhost VQ %d notifier cleanup error: %d\n", i, -r);
fflush(stderr);
@ -1151,7 +1159,11 @@ void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev)
int i, r;
for (i = 0; i < hdev->nvqs; ++i) {
r = virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), hdev->vq_index + i,
false);
if (r == -ENOSYS) {
r = k->set_host_notifier(qbus->parent, hdev->vq_index + i, false);
}
if (r < 0) {
fprintf(stderr, "vhost VQ %d notifier cleanup failed: %d\n", i, -r);
fflush(stderr);