2008-10-13 07:12:02 +04:00
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/*
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* QEMU live migration
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef QEMU_MIGRATION_H
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#define QEMU_MIGRATION_H
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2012-12-17 21:19:43 +04:00
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#include "qapi/qmp/qdict.h"
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2009-03-06 02:01:23 +03:00
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#include "qemu-common.h"
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2012-12-19 12:55:50 +04:00
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#include "qemu/thread.h"
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2012-12-17 21:20:00 +04:00
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#include "qemu/notify.h"
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2012-12-17 21:19:43 +04:00
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#include "qapi/error.h"
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2012-12-17 21:19:50 +04:00
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#include "migration/vmstate.h"
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2012-08-06 22:42:47 +04:00
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#include "qapi-types.h"
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2013-06-26 05:35:35 +04:00
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#include "exec/cpu-common.h"
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2009-03-06 02:01:23 +03:00
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2013-11-28 18:01:11 +04:00
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#define QEMU_VM_FILE_MAGIC 0x5145564d
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#define QEMU_VM_FILE_VERSION_COMPAT 0x00000002
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#define QEMU_VM_FILE_VERSION 0x00000003
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#define QEMU_VM_EOF 0x00
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#define QEMU_VM_SECTION_START 0x01
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#define QEMU_VM_SECTION_PART 0x02
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#define QEMU_VM_SECTION_END 0x03
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#define QEMU_VM_SECTION_FULL 0x04
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#define QEMU_VM_SUBSECTION 0x05
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2015-01-22 17:01:39 +03:00
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#define QEMU_VM_VMDESCRIPTION 0x06
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2015-05-13 19:17:43 +03:00
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#define QEMU_VM_CONFIGURATION 0x07
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2015-05-19 14:29:52 +03:00
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#define QEMU_VM_SECTION_FOOTER 0x7e
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2013-11-28 18:01:11 +04:00
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2012-06-19 19:43:09 +04:00
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struct MigrationParams {
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bool blk;
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bool shared;
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};
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2010-05-11 17:56:35 +04:00
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typedef struct MigrationState MigrationState;
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2010-05-11 17:46:39 +04:00
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2015-05-21 15:24:16 +03:00
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typedef QLIST_HEAD(, LoadStateEntry) LoadStateEntry_Head;
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2015-05-21 15:24:14 +03:00
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/* State for the incoming migration */
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struct MigrationIncomingState {
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QEMUFile *file;
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2015-05-21 15:24:16 +03:00
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/* See savevm.c */
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LoadStateEntry_Head loadvm_handlers;
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2015-05-21 15:24:14 +03:00
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};
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MigrationIncomingState *migration_incoming_get_current(void);
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MigrationIncomingState *migration_incoming_state_new(QEMUFile *f);
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void migration_incoming_state_destroy(void);
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2010-05-11 17:56:35 +04:00
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struct MigrationState
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2008-11-11 19:46:33 +03:00
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{
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int64_t bandwidth_limit;
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2012-12-19 12:55:50 +04:00
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size_t bytes_xfer;
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size_t xfer_limit;
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QemuThread thread;
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2013-02-22 20:36:21 +04:00
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QEMUBH *cleanup_bh;
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2008-11-11 19:46:33 +03:00
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QEMUFile *file;
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2015-03-23 11:32:27 +03:00
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int parameters[MIGRATION_PARAMETER_MAX];
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2013-02-22 20:36:41 +04:00
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int state;
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2012-06-19 19:43:09 +04:00
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MigrationParams params;
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2013-06-26 05:35:30 +04:00
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double mbps;
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2012-05-22 00:01:07 +04:00
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int64_t total_time;
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2012-08-13 11:35:16 +04:00
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int64_t downtime;
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2012-08-13 11:53:12 +04:00
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int64_t expected_downtime;
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2012-08-13 14:31:25 +04:00
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int64_t dirty_pages_rate;
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2013-02-01 16:22:37 +04:00
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int64_t dirty_bytes_rate;
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2012-08-06 22:42:47 +04:00
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bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
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2012-08-06 22:42:53 +04:00
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int64_t xbzrle_cache_size;
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2013-07-22 18:01:58 +04:00
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int64_t setup_time;
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2014-04-04 13:57:55 +04:00
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int64_t dirty_sync_count;
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2008-11-11 19:46:33 +03:00
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};
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2010-06-09 16:10:55 +04:00
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void process_incoming_migration(QEMUFile *f);
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2012-10-02 20:21:18 +04:00
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void qemu_start_incoming_migration(const char *uri, Error **errp);
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2008-10-13 07:12:02 +04:00
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2009-05-28 23:22:57 +04:00
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uint64_t migrate_max_downtime(void);
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2012-10-02 20:21:18 +04:00
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void exec_start_incoming_migration(const char *host_port, Error **errp);
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2008-11-11 19:46:33 +03:00
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2012-10-02 12:02:46 +04:00
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void exec_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
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2008-11-11 19:46:33 +03:00
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2012-10-02 20:21:18 +04:00
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void tcp_start_incoming_migration(const char *host_port, Error **errp);
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2008-10-13 07:14:31 +04:00
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2012-10-02 12:02:46 +04:00
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void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp);
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2008-10-13 07:14:31 +04:00
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2012-10-02 20:21:18 +04:00
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void unix_start_incoming_migration(const char *path, Error **errp);
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2009-08-05 19:24:29 +04:00
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2012-10-02 12:02:46 +04:00
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void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp);
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2009-08-05 19:24:29 +04:00
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2012-10-02 20:21:18 +04:00
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void fd_start_incoming_migration(const char *path, Error **errp);
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2009-08-18 17:56:25 +04:00
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2012-10-02 12:02:46 +04:00
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void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp);
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2009-08-18 17:56:25 +04:00
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2013-07-22 18:01:54 +04:00
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void rdma_start_outgoing_migration(void *opaque, const char *host_port, Error **errp);
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void rdma_start_incoming_migration(const char *host_port, Error **errp);
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2010-05-11 17:56:35 +04:00
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void migrate_fd_error(MigrationState *s);
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2008-11-11 19:46:33 +03:00
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2010-05-11 17:56:35 +04:00
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void migrate_fd_connect(MigrationState *s);
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2008-11-11 19:46:33 +03:00
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2012-07-20 15:19:36 +04:00
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int migrate_fd_close(MigrationState *s);
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2012-07-20 15:10:54 +04:00
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2010-12-13 19:30:12 +03:00
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void add_migration_state_change_notifier(Notifier *notify);
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void remove_migration_state_change_notifier(Notifier *notify);
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2013-07-29 17:01:58 +04:00
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bool migration_in_setup(MigrationState *);
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2011-02-23 02:43:59 +03:00
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bool migration_has_finished(MigrationState *);
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2011-10-25 15:50:11 +04:00
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bool migration_has_failed(MigrationState *);
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2012-08-13 11:42:49 +04:00
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MigrationState *migrate_get_current(void);
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2010-12-13 19:30:12 +03:00
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2015-03-23 11:32:17 +03:00
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void migrate_compress_threads_create(void);
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void migrate_compress_threads_join(void);
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2015-03-23 11:32:18 +03:00
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void migrate_decompress_threads_create(void);
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void migrate_decompress_threads_join(void);
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2011-04-03 12:23:19 +04:00
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uint64_t ram_bytes_remaining(void);
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uint64_t ram_bytes_transferred(void);
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uint64_t ram_bytes_total(void);
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2014-01-30 22:08:35 +04:00
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void free_xbzrle_decoded_buf(void);
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2011-04-03 12:23:19 +04:00
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2013-06-26 05:35:28 +04:00
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void acct_update_position(QEMUFile *f, size_t size, bool zero);
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2012-08-06 22:42:56 +04:00
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uint64_t dup_mig_bytes_transferred(void);
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uint64_t dup_mig_pages_transferred(void);
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2013-03-26 13:58:37 +04:00
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uint64_t skipped_mig_bytes_transferred(void);
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uint64_t skipped_mig_pages_transferred(void);
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2012-08-06 22:42:56 +04:00
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uint64_t norm_mig_bytes_transferred(void);
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uint64_t norm_mig_pages_transferred(void);
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2012-08-06 22:42:57 +04:00
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uint64_t xbzrle_mig_bytes_transferred(void);
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uint64_t xbzrle_mig_pages_transferred(void);
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uint64_t xbzrle_mig_pages_overflow(void);
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uint64_t xbzrle_mig_pages_cache_miss(void);
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2014-04-04 13:57:56 +04:00
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double xbzrle_mig_cache_miss_rate(void);
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2012-08-06 22:42:56 +04:00
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2013-07-22 18:01:53 +04:00
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void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
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2011-11-15 01:09:43 +04:00
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/**
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* @migrate_add_blocker - prevent migration from proceeding
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*
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* @reason - an error to be returned whenever migration is attempted
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*/
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void migrate_add_blocker(Error *reason);
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/**
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* @migrate_del_blocker - remove a blocking error from migration
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*
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* @reason - the error blocking migration
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*/
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void migrate_del_blocker(Error *reason);
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2013-07-18 11:48:50 +04:00
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bool migrate_zero_blocks(void);
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2013-06-26 05:35:36 +04:00
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2013-06-24 13:49:42 +04:00
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bool migrate_auto_converge(void);
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2012-08-06 22:42:52 +04:00
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int xbzrle_encode_buffer(uint8_t *old_buf, uint8_t *new_buf, int slen,
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uint8_t *dst, int dlen);
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int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
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2012-08-06 22:42:53 +04:00
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int migrate_use_xbzrle(void);
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int64_t migrate_xbzrle_cache_size(void);
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2012-08-06 22:42:54 +04:00
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int64_t xbzrle_cache_resize(int64_t new_size);
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2013-06-26 05:35:35 +04:00
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2015-03-23 11:32:17 +03:00
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bool migrate_use_compression(void);
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int migrate_compress_level(void);
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int migrate_compress_threads(void);
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2015-03-23 11:32:18 +03:00
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int migrate_decompress_threads(void);
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2015-07-07 15:44:05 +03:00
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bool migrate_use_events(void);
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2015-03-23 11:32:17 +03:00
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2013-06-26 05:35:35 +04:00
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void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
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void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
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2015-06-11 20:17:23 +03:00
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void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data);
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2013-06-26 05:35:35 +04:00
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/* Whenever this is found in the data stream, the flags
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* will be passed to ram_control_load_hook in the incoming-migration
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* side. This lets before_ram_iterate/after_ram_iterate add
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* transport-specific sections to the RAM migration data.
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*/
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#define RAM_SAVE_FLAG_HOOK 0x80
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#define RAM_SAVE_CONTROL_NOT_SUPP -1000
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#define RAM_SAVE_CONTROL_DELAYED -2000
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size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
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ram_addr_t offset, size_t size,
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2015-02-12 21:02:42 +03:00
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uint64_t *bytes_sent);
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2013-06-26 05:35:35 +04:00
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2015-05-07 20:33:31 +03:00
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void ram_mig_init(void);
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2015-05-19 14:29:51 +03:00
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void savevm_skip_section_footers(void);
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2014-10-08 12:58:10 +04:00
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void register_global_state(void);
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2014-10-08 15:58:24 +04:00
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void global_state_set_optional(void);
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2015-05-13 19:17:43 +03:00
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void savevm_skip_configuration(void);
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2015-07-15 10:53:46 +03:00
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int global_state_store(void);
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2008-10-13 07:12:02 +04:00
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#endif
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