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/*

 * QEMU live migration

 *

 * Copyright IBM, Corp. 2008

 *

 * Authors:

 *  Anthony Liguori   <aliguori@us.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2.  See

 * the COPYING file in the top-level directory.

 *

 */

#ifndef QEMU_MIGRATION_H

#define QEMU_MIGRATION_H

#include "qdict.h"

#include "qemu-common.h"

#include "notify.h"

#include "error.h"

struct MigrationParams {

    bool blk;

    bool shared;

};

typedef struct MigrationState MigrationState;

struct MigrationState

{

    int64_t bandwidth_limit;

    QEMUFile *file;

    int fd;

    int state;

    int (*get_error)(MigrationState *s);

    int (*close)(MigrationState *s);

    int (*write)(MigrationState *s, const void *buff, size_t size);

    void *opaque;

    MigrationParams params;

    int64_t total_time;

};

void process_incoming_migration(QEMUFile *f);

int qemu_start_incoming_migration(const char *uri, Error **errp);

uint64_t migrate_max_downtime(void);

void do_info_migrate_print(Monitor *mon, const QObject *data);

void do_info_migrate(Monitor *mon, QObject **ret_data);

int exec_start_incoming_migration(const char *host_port);

int exec_start_outgoing_migration(MigrationState *s, const char *host_port);

int tcp_start_incoming_migration(const char *host_port, Error **errp);

int tcp_start_outgoing_migration(MigrationState *s, const char *host_port,

                                 Error **errp);

int unix_start_incoming_migration(const char *path);

int unix_start_outgoing_migration(MigrationState *s, const char *path);

int fd_start_incoming_migration(const char *path);

int fd_start_outgoing_migration(MigrationState *s, const char *fdname);

void migrate_fd_error(MigrationState *s);

void migrate_fd_connect(MigrationState *s);

void add_migration_state_change_notifier(Notifier *notify);

void remove_migration_state_change_notifier(Notifier *notify);

bool migration_is_active(MigrationState *);

bool migration_has_finished(MigrationState *);

bool migration_has_failed(MigrationState *);

uint64_t ram_bytes_remaining(void);

uint64_t ram_bytes_transferred(void);

uint64_t ram_bytes_total(void);

int ram_save_live(QEMUFile *f, int stage, void *opaque);

int ram_load(QEMUFile *f, void *opaque, int version_id);

/**

 * @migrate_add_blocker - prevent migration from proceeding

 *

 * @reason - an error to be returned whenever migration is attempted

 */

void migrate_add_blocker(Error *reason);

/**

 * @migrate_del_blocker - remove a blocking error from migration

 *

 * @reason - the error blocking migration

 */

void migrate_del_blocker(Error *reason);

#endif