43487c678d
These are the prototypes and implementation of new hooks that RDMA takes advantage of to perform dynamic page registration. An optional hook is also introduced for a custom function to be able to override the default save_page function. Also included are the prototypes and accessor methods used by arch_init.c which invoke funtions inside savevm.c to call out to the hooks that may or may not have been overridden inside of QEMUFileOps. Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Chegu Vinod <chegu_vinod@hp.com> Tested-by: Chegu Vinod <chegu_vinod@hp.com> Tested-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Michael R. Hines <mrhines@us.ibm.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/*
|
|
* 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 "qapi/qmp/qdict.h"
|
|
#include "qemu-common.h"
|
|
#include "qemu/thread.h"
|
|
#include "qemu/notify.h"
|
|
#include "qapi/error.h"
|
|
#include "migration/vmstate.h"
|
|
#include "qapi-types.h"
|
|
#include "exec/cpu-common.h"
|
|
|
|
struct MigrationParams {
|
|
bool blk;
|
|
bool shared;
|
|
};
|
|
|
|
typedef struct MigrationState MigrationState;
|
|
|
|
struct MigrationState
|
|
{
|
|
int64_t bandwidth_limit;
|
|
size_t bytes_xfer;
|
|
size_t xfer_limit;
|
|
QemuThread thread;
|
|
QEMUBH *cleanup_bh;
|
|
QEMUFile *file;
|
|
|
|
int state;
|
|
MigrationParams params;
|
|
double mbps;
|
|
int64_t total_time;
|
|
int64_t downtime;
|
|
int64_t expected_downtime;
|
|
int64_t dirty_pages_rate;
|
|
int64_t dirty_bytes_rate;
|
|
bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
|
|
int64_t xbzrle_cache_size;
|
|
};
|
|
|
|
void process_incoming_migration(QEMUFile *f);
|
|
|
|
void 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);
|
|
|
|
void exec_start_incoming_migration(const char *host_port, Error **errp);
|
|
|
|
void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
|
|
|
|
void tcp_start_incoming_migration(const char *host_port, Error **errp);
|
|
|
|
void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
|
|
|
|
void unix_start_incoming_migration(const char *path, Error **errp);
|
|
|
|
void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
|
|
|
|
void fd_start_incoming_migration(const char *path, Error **errp);
|
|
|
|
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp);
|
|
|
|
void migrate_fd_error(MigrationState *s);
|
|
|
|
void migrate_fd_connect(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);
|
|
|
|
void acct_update_position(QEMUFile *f, size_t size, bool zero);
|
|
|
|
extern SaveVMHandlers savevm_ram_handlers;
|
|
|
|
uint64_t dup_mig_bytes_transferred(void);
|
|
uint64_t dup_mig_pages_transferred(void);
|
|
uint64_t skipped_mig_bytes_transferred(void);
|
|
uint64_t skipped_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);
|
|
|
|
void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
|
|
void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
|
|
void ram_control_load_hook(QEMUFile *f, uint64_t flags);
|
|
|
|
/* Whenever this is found in the data stream, the flags
|
|
* will be passed to ram_control_load_hook in the incoming-migration
|
|
* side. This lets before_ram_iterate/after_ram_iterate add
|
|
* transport-specific sections to the RAM migration data.
|
|
*/
|
|
#define RAM_SAVE_FLAG_HOOK 0x80
|
|
|
|
#define RAM_SAVE_CONTROL_NOT_SUPP -1000
|
|
#define RAM_SAVE_CONTROL_DELAYED -2000
|
|
|
|
size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
|
|
ram_addr_t offset, size_t size,
|
|
int *bytes_sent);
|
|
|
|
#endif
|