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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"
#include "vmstate.h"
#include "qapi-types.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;
int64_t downtime;
int64_t expected_downtime;
int64_t dirty_pages_rate;
bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
int64_t xbzrle_cache_size;
};
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);
ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data,
size_t size);
void migrate_fd_put_ready(MigrationState *s);
int migrate_fd_wait_for_unfreeze(MigrationState *s);
int migrate_fd_close(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 *);
MigrationState *migrate_get_current(void);
uint64_t ram_bytes_remaining(void);
uint64_t ram_bytes_transferred(void);
uint64_t ram_bytes_total(void);
extern SaveVMHandlers savevm_ram_handlers;
uint64_t dup_mig_bytes_transferred(void);
uint64_t dup_mig_pages_transferred(void);
uint64_t norm_mig_bytes_transferred(void);
uint64_t norm_mig_pages_transferred(void);
uint64_t xbzrle_mig_bytes_transferred(void);
uint64_t xbzrle_mig_pages_transferred(void);
uint64_t xbzrle_mig_pages_overflow(void);
uint64_t xbzrle_mig_pages_cache_miss(void);
/**
* @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);
int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
uint8_t *dst, int dlen);
int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
int64_t xbzrle_cache_resize(int64_t new_size);
#endif
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