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migration: disallow migrate_add_blocker during migration

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If a migration is already in progress and somebody attempts
to add a migration blocker, this should rightly fail.

Add an errp parameter and a retcode return value to migrate_add_blocker.

Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Message-Id: <1484566314-3987-5-git-send-email-ashijeetacharya@gmail.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  Merged with recent 'Allow invtsc migration' change
This commit is contained in:
Ashijeet Acharya 2017-01-16 17:01:53 +05:30 • committed by Dr. David Alan Gilbert
parent a3a3d8c738
commit fe44dc9180
18 changed files with 222 additions and 81 deletions
Download patch file Download diff file Expand all files Collapse all files

32
hw/display/virtio-gpu.c
View file

@ -1136,6 +1136,7 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
VirtIODevice *vdev = VIRTIO_DEVICE(qdev);
VirtIOGPU *g = VIRTIO_GPU(qdev);
bool have_virgl;
Error *local_err = NULL;
int i;
if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUTS) {
@ -1143,14 +1144,6 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
return;
}
g->config_size = sizeof(struct virtio_gpu_config);
g->virtio_config.num_scanouts = g->conf.max_outputs;
virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,
g->config_size);
g->req_state[0].width = 1024;
g->req_state[0].height = 768;
g->use_virgl_renderer = false;
#if !defined(CONFIG_VIRGL) || defined(HOST_WORDS_BIGENDIAN)
have_virgl = false;
@ -1161,6 +1154,24 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
g->conf.flags &= ~(1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
}
if (virtio_gpu_virgl_enabled(g->conf)) {
error_setg(&g->migration_blocker, "virgl is not yet migratable");
migrate_add_blocker(g->migration_blocker, &local_err);
if (local_err) {
error_propagate(errp, local_err);
error_free(g->migration_blocker);
return;
}
}
g->config_size = sizeof(struct virtio_gpu_config);
g->virtio_config.num_scanouts = g->conf.max_outputs;
virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,
g->config_size);
g->req_state[0].width = 1024;
g->req_state[0].height = 768;
if (virtio_gpu_virgl_enabled(g->conf)) {
/* use larger control queue in 3d mode */
g->ctrl_vq = virtio_add_queue(vdev, 256, virtio_gpu_handle_ctrl_cb);
@ -1187,11 +1198,6 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
dpy_gfx_replace_surface(g->scanout[i].con, NULL);
}
}
if (virtio_gpu_virgl_enabled(g->conf)) {
error_setg(&g->migration_blocker, "virgl is not yet migratable");
migrate_add_blocker(g->migration_blocker);
}
}
static void virtio_gpu_device_unrealize(DeviceState *qdev, Error **errp)