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/*
* QEMU yank feature
*
* Copyright (c) Lukas Straub <lukasstraub2@web.de>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef YANK_H
#define YANK_H
#include "qapi/qapi-types-yank.h"
typedef void (YankFn)(void *opaque);
/**
* yank_register_instance: Register a new instance.
*
* This registers a new instance for yanking. Must be called before any yank
* function is registered for this instance.
*
* This function is thread-safe.
*
* @instance: The instance.
* @errp: Error object.
*
* Returns true on success or false if an error occured.
*/
bool yank_register_instance(const YankInstance *instance, Error **errp);
/**
* yank_unregister_instance: Unregister a instance.
*
* This unregisters a instance. Must be called only after every yank function
* of the instance has been unregistered.
*
* This function is thread-safe.
*
* @instance: The instance.
*/
void yank_unregister_instance(const YankInstance *instance);
/**
* yank_register_function: Register a yank function
*
* This registers a yank function. All limitations of qmp oob commands apply
* to the yank function as well. See docs/devel/qapi-code-gen.txt under
* "An OOB-capable command handler must satisfy the following conditions".
*
* This function is thread-safe.
*
* @instance: The instance.
* @func: The yank function.
* @opaque: Will be passed to the yank function.
*/
void yank_register_function(const YankInstance *instance,
YankFn *func,
void *opaque);
/**
* yank_unregister_function: Unregister a yank function
*
* This unregisters a yank function.
*
* This function is thread-safe.
*
* @instance: The instance.
* @func: func that was passed to yank_register_function.
* @opaque: opaque that was passed to yank_register_function.
*/
void yank_unregister_function(const YankInstance *instance,
YankFn *func,
void *opaque);
/**
* yank_generic_iochannel: Generic yank function for iochannel
*
* This is a generic yank function which will call qio_channel_shutdown on the
* provided QIOChannel.
*
* @opaque: QIOChannel to shutdown
*/
void yank_generic_iochannel(void *opaque);
#define BLOCKDEV_YANK_INSTANCE(the_node_name) (&(YankInstance) { \
.type = YANK_INSTANCE_TYPE_BLOCK_NODE, \
.u.block_node.node_name = (the_node_name) })
#define CHARDEV_YANK_INSTANCE(the_id) (&(YankInstance) { \
.type = YANK_INSTANCE_TYPE_CHARDEV, \
.u.chardev.id = (the_id) })
#define MIGRATION_YANK_INSTANCE (&(YankInstance) { \
.type = YANK_INSTANCE_TYPE_MIGRATION })
#endif
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