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virtio-9p: add savem handlers 

We don't support migration of mounted 9p shares. This is handled by a
migration blocker.

One would expect, however, to be able to migrate if the share is unmounted.
Unfortunately virtio-9p-device does not register savevm handlers at all !
Migration succeeds and leaves the guest with a dangling device...

This patch simply registers migration handlers for virtio-9p-device. Whether
migration is possible or not still depends on the migration blocker.

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Greg Kurz 2015-10-22 19:38:42 +02:00 committed by Michael S. Tsirkin
parent 1811e64c35
commit 4652f1640e
1 changed files with 11 additions and 0 deletions
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11
hw/9pfs/virtio-9p-device.c
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@ -43,6 +43,16 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
g_free(cfg);
}
static void virtio_9p_save(QEMUFile *f, void *opaque)
{
virtio_save(VIRTIO_DEVICE(opaque), f);
}
static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id)
{
return virtio_load(VIRTIO_DEVICE(opaque), f, version_id);
}
static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@ -130,6 +140,7 @@ static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
}
v9fs_path_free(&path);
register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
return;
out:
g_free(s->ctx.fs_root);