2ce68e4cf5
it will allow for other parts of QEMU check if it's safe to map memory region during hotplug/runtime. That way hotplug path will have a chance to cancel hotplug operation instead of crashing in vhost_commit(). Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
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* vhost-backend
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*
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* Copyright (c) 2013 Virtual Open Systems Sarl.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef VHOST_BACKEND_H_
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#define VHOST_BACKEND_H_
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typedef enum VhostBackendType {
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VHOST_BACKEND_TYPE_NONE = 0,
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VHOST_BACKEND_TYPE_KERNEL = 1,
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VHOST_BACKEND_TYPE_USER = 2,
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VHOST_BACKEND_TYPE_MAX = 3,
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} VhostBackendType;
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struct vhost_dev;
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typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request,
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void *arg);
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typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
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typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
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typedef int (*vhost_backend_get_vq_index)(struct vhost_dev *dev, int idx);
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typedef int (*vhost_backend_set_vring_enable)(struct vhost_dev *dev, int enable);
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typedef int (*vhost_backend_memslots_limit)(struct vhost_dev *dev);
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typedef struct VhostOps {
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VhostBackendType backend_type;
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vhost_call vhost_call;
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vhost_backend_init vhost_backend_init;
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vhost_backend_cleanup vhost_backend_cleanup;
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vhost_backend_get_vq_index vhost_backend_get_vq_index;
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vhost_backend_set_vring_enable vhost_backend_set_vring_enable;
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vhost_backend_memslots_limit vhost_backend_memslots_limit;
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} VhostOps;
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extern const VhostOps user_ops;
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int vhost_set_backend_type(struct vhost_dev *dev,
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VhostBackendType backend_type);
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#endif /* VHOST_BACKEND_H_ */
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