268 lines
8.6 KiB
C
268 lines
8.6 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-types.h"
|
|
#include "exec/cpu-common.h"
|
|
#include "qemu/coroutine_int.h"
|
|
|
|
#define QEMU_VM_FILE_MAGIC 0x5145564d
|
|
#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
|
|
#define QEMU_VM_FILE_VERSION 0x00000003
|
|
|
|
#define QEMU_VM_EOF 0x00
|
|
#define QEMU_VM_SECTION_START 0x01
|
|
#define QEMU_VM_SECTION_PART 0x02
|
|
#define QEMU_VM_SECTION_END 0x03
|
|
#define QEMU_VM_SECTION_FULL 0x04
|
|
#define QEMU_VM_SUBSECTION 0x05
|
|
#define QEMU_VM_VMDESCRIPTION 0x06
|
|
#define QEMU_VM_CONFIGURATION 0x07
|
|
#define QEMU_VM_COMMAND 0x08
|
|
#define QEMU_VM_SECTION_FOOTER 0x7e
|
|
|
|
/* Messages sent on the return path from destination to source */
|
|
enum mig_rp_message_type {
|
|
MIG_RP_MSG_INVALID = 0, /* Must be 0 */
|
|
MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */
|
|
MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */
|
|
|
|
MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */
|
|
MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */
|
|
|
|
MIG_RP_MSG_MAX
|
|
};
|
|
|
|
/* State for the incoming migration */
|
|
struct MigrationIncomingState {
|
|
QEMUFile *from_src_file;
|
|
|
|
/*
|
|
* Free at the start of the main state load, set as the main thread finishes
|
|
* loading state.
|
|
*/
|
|
QemuEvent main_thread_load_event;
|
|
|
|
size_t largest_page_size;
|
|
bool have_fault_thread;
|
|
QemuThread fault_thread;
|
|
QemuSemaphore fault_thread_sem;
|
|
|
|
bool have_listen_thread;
|
|
QemuThread listen_thread;
|
|
QemuSemaphore listen_thread_sem;
|
|
|
|
/* For the kernel to send us notifications */
|
|
int userfault_fd;
|
|
/* To tell the fault_thread to quit */
|
|
int userfault_quit_fd;
|
|
QEMUFile *to_src_file;
|
|
QemuMutex rp_mutex; /* We send replies from multiple threads */
|
|
void *postcopy_tmp_page;
|
|
void *postcopy_tmp_zero_page;
|
|
|
|
QEMUBH *bh;
|
|
|
|
int state;
|
|
|
|
bool have_colo_incoming_thread;
|
|
QemuThread colo_incoming_thread;
|
|
/* The coroutine we should enter (back) after failover */
|
|
Coroutine *migration_incoming_co;
|
|
QemuSemaphore colo_incoming_sem;
|
|
};
|
|
|
|
MigrationIncomingState *migration_incoming_get_current(void);
|
|
void migration_incoming_state_destroy(void);
|
|
|
|
struct MigrationState
|
|
{
|
|
size_t bytes_xfer;
|
|
size_t xfer_limit;
|
|
QemuThread thread;
|
|
QEMUBH *cleanup_bh;
|
|
QEMUFile *to_dst_file;
|
|
|
|
/* params from 'migrate-set-parameters' */
|
|
MigrationParameters parameters;
|
|
|
|
int state;
|
|
|
|
/* State related to return path */
|
|
struct {
|
|
QEMUFile *from_dst_file;
|
|
QemuThread rp_thread;
|
|
bool error;
|
|
} rp_state;
|
|
|
|
double mbps;
|
|
int64_t total_time;
|
|
int64_t downtime;
|
|
int64_t expected_downtime;
|
|
bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
|
|
int64_t xbzrle_cache_size;
|
|
int64_t setup_time;
|
|
|
|
/* Flag set once the migration has been asked to enter postcopy */
|
|
bool start_postcopy;
|
|
/* Flag set after postcopy has sent the device state */
|
|
bool postcopy_after_devices;
|
|
|
|
/* Flag set once the migration thread is running (and needs joining) */
|
|
bool migration_thread_running;
|
|
|
|
/* Flag set once the migration thread called bdrv_inactivate_all */
|
|
bool block_inactive;
|
|
|
|
/* The semaphore is used to notify COLO thread that failover is finished */
|
|
QemuSemaphore colo_exit_sem;
|
|
|
|
/* The semaphore is used to notify COLO thread to do checkpoint */
|
|
QemuSemaphore colo_checkpoint_sem;
|
|
int64_t colo_checkpoint_time;
|
|
QEMUTimer *colo_delay_timer;
|
|
|
|
/* The last error that occurred */
|
|
Error *error;
|
|
/* Do we have to clean up -b/-i from old migrate parameters */
|
|
/* This feature is deprecated and will be removed */
|
|
bool must_remove_block_options;
|
|
};
|
|
|
|
void migrate_set_state(int *state, int old_state, int new_state);
|
|
|
|
void migration_fd_process_incoming(QEMUFile *f);
|
|
|
|
void qemu_start_incoming_migration(const char *uri, Error **errp);
|
|
|
|
uint64_t migrate_max_downtime(void);
|
|
|
|
void migrate_fd_error(MigrationState *s, const Error *error);
|
|
|
|
void migrate_fd_connect(MigrationState *s);
|
|
|
|
void add_migration_state_change_notifier(Notifier *notify);
|
|
void remove_migration_state_change_notifier(Notifier *notify);
|
|
MigrationState *migrate_init(void);
|
|
bool migration_is_blocked(Error **errp);
|
|
bool migration_in_setup(MigrationState *);
|
|
bool migration_is_idle(void);
|
|
bool migration_has_finished(MigrationState *);
|
|
bool migration_has_failed(MigrationState *);
|
|
/* True if outgoing migration has entered postcopy phase */
|
|
bool migration_in_postcopy(void);
|
|
/* ...and after the device transmission */
|
|
bool migration_in_postcopy_after_devices(MigrationState *);
|
|
MigrationState *migrate_get_current(void);
|
|
|
|
void migrate_compress_threads_create(void);
|
|
void migrate_compress_threads_join(void);
|
|
void migrate_decompress_threads_create(void);
|
|
void migrate_decompress_threads_join(void);
|
|
uint64_t ram_bytes_remaining(void);
|
|
uint64_t ram_bytes_transferred(void);
|
|
uint64_t ram_bytes_total(void);
|
|
uint64_t ram_dirty_sync_count(void);
|
|
uint64_t ram_dirty_pages_rate(void);
|
|
uint64_t ram_postcopy_requests(void);
|
|
void free_xbzrle_decoded_buf(void);
|
|
|
|
void acct_update_position(QEMUFile *f, size_t size, bool zero);
|
|
|
|
uint64_t dup_mig_pages_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);
|
|
double xbzrle_mig_cache_miss_rate(void);
|
|
|
|
void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
|
|
void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
|
|
unsigned long pages);
|
|
/* For outgoing discard bitmap */
|
|
int ram_postcopy_send_discard_bitmap(MigrationState *ms);
|
|
/* For incoming postcopy discard */
|
|
int ram_discard_range(const char *block_name, uint64_t start, size_t length);
|
|
int ram_postcopy_incoming_init(MigrationIncomingState *mis);
|
|
void ram_postcopy_migrated_memory_release(MigrationState *ms);
|
|
|
|
bool migrate_release_ram(void);
|
|
bool migrate_postcopy_ram(void);
|
|
bool migrate_zero_blocks(void);
|
|
|
|
bool migrate_auto_converge(void);
|
|
|
|
int migrate_use_xbzrle(void);
|
|
int64_t migrate_xbzrle_cache_size(void);
|
|
bool migrate_colo_enabled(void);
|
|
|
|
int64_t xbzrle_cache_resize(int64_t new_size);
|
|
|
|
bool migrate_use_block(void);
|
|
bool migrate_use_block_incremental(void);
|
|
|
|
bool migrate_use_compression(void);
|
|
int migrate_compress_level(void);
|
|
int migrate_compress_threads(void);
|
|
int migrate_decompress_threads(void);
|
|
bool migrate_use_events(void);
|
|
|
|
/* Sending on the return path - generic and then for each message type */
|
|
void migrate_send_rp_message(MigrationIncomingState *mis,
|
|
enum mig_rp_message_type message_type,
|
|
uint16_t len, void *data);
|
|
void migrate_send_rp_shut(MigrationIncomingState *mis,
|
|
uint32_t value);
|
|
void migrate_send_rp_pong(MigrationIncomingState *mis,
|
|
uint32_t value);
|
|
void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char* rbname,
|
|
ram_addr_t start, size_t len);
|
|
|
|
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, void *data);
|
|
|
|
/* 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,
|
|
uint64_t *bytes_sent);
|
|
|
|
void ram_mig_init(void);
|
|
void savevm_skip_section_footers(void);
|
|
void register_global_state(void);
|
|
void global_state_set_optional(void);
|
|
void savevm_skip_configuration(void);
|
|
int global_state_store(void);
|
|
void global_state_store_running(void);
|
|
|
|
void migration_page_queue_free(void);
|
|
int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
|
|
uint64_t ram_pagesize_summary(void);
|
|
#endif
|