Archipelago » qemu

/*

 * 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"

#define MIG_STATE_ERROR                -1

#define MIG_STATE_COMPLETED        0

#define MIG_STATE_CANCELLED        1

#define MIG_STATE_ACTIVE        2

typedef struct MigrationState MigrationState;

struct MigrationState

{

    /* FIXME: add more accessors to print migration info */

    void (*cancel)(MigrationState *s);

    int (*get_status)(MigrationState *s);

    void (*release)(MigrationState *s);

};

typedef struct FdMigrationState FdMigrationState;

struct FdMigrationState

{

    MigrationState mig_state;

    int64_t bandwidth_limit;

    QEMUFile *file;

    int fd;

    Monitor *mon_resume;

    int state;

    int (*get_error)(struct FdMigrationState*);

    int (*close)(struct FdMigrationState*);

    int (*write)(struct FdMigrationState*, const void *, size_t);

    void *opaque;

};

void qemu_start_incoming_migration(const char *uri);

void do_migrate(Monitor *mon, int detach, const char *uri);

void do_migrate_cancel(Monitor *mon, const QDict *qdict);

void do_migrate_set_speed(Monitor *mon, const QDict *qdict);

uint64_t migrate_max_downtime(void);

void do_migrate_set_downtime(Monitor *mon, const QDict *qdict);

void do_info_migrate(Monitor *mon);

int exec_start_incoming_migration(const char *host_port);

MigrationState *exec_start_outgoing_migration(const char *host_port,

                                             int64_t bandwidth_limit,

                                             int detach);

int tcp_start_incoming_migration(const char *host_port);

MigrationState *tcp_start_outgoing_migration(const char *host_port,

                                             int64_t bandwidth_limit,

                                             int detach);

int unix_start_incoming_migration(const char *path);

MigrationState *unix_start_outgoing_migration(const char *path,

                                              int64_t bandwidth_limit,

                                              int detach);

int fd_start_incoming_migration(const char *path);

MigrationState *fd_start_outgoing_migration(Monitor *mon,

                                            const char *fdname,

                                            int64_t bandwidth_limit,

                                            int detach);

void migrate_fd_monitor_suspend(FdMigrationState *s);

void migrate_fd_error(FdMigrationState *s);

void migrate_fd_cleanup(FdMigrationState *s);

void migrate_fd_put_notify(void *opaque);

ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);

void migrate_fd_connect(FdMigrationState *s);

void migrate_fd_put_ready(void *opaque);

int migrate_fd_get_status(MigrationState *mig_state);

void migrate_fd_cancel(MigrationState *mig_state);

void migrate_fd_release(MigrationState *mig_state);

void migrate_fd_wait_for_unfreeze(void *opaque);

int migrate_fd_close(void *opaque);

static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)

{

    return container_of(mig_state, FdMigrationState, mig_state);

}

#endif