4 * Copyright IBM, Corp. 2008
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #ifndef QEMU_MIGRATION_H
15 #define QEMU_MIGRATION_H
17 #include "qapi/qmp/qdict.h"
18 #include "qemu-common.h"
19 #include "qemu/thread.h"
20 #include "qemu/notify.h"
21 #include "qapi/error.h"
22 #include "migration/vmstate.h"
23 #include "qapi-types.h"
25 struct MigrationParams
{
30 typedef struct MigrationState MigrationState
;
34 int64_t bandwidth_limit
;
42 MigrationParams params
;
46 int64_t expected_downtime
;
47 int64_t dirty_pages_rate
;
48 int64_t dirty_bytes_rate
;
49 bool enabled_capabilities
[MIGRATION_CAPABILITY_MAX
];
50 int64_t xbzrle_cache_size
;
53 void process_incoming_migration(QEMUFile
*f
);
55 void qemu_start_incoming_migration(const char *uri
, Error
**errp
);
57 uint64_t migrate_max_downtime(void);
59 void do_info_migrate_print(Monitor
*mon
, const QObject
*data
);
61 void do_info_migrate(Monitor
*mon
, QObject
**ret_data
);
63 void exec_start_incoming_migration(const char *host_port
, Error
**errp
);
65 void exec_start_outgoing_migration(MigrationState
*s
, const char *host_port
, Error
**errp
);
67 void tcp_start_incoming_migration(const char *host_port
, Error
**errp
);
69 void tcp_start_outgoing_migration(MigrationState
*s
, const char *host_port
, Error
**errp
);
71 void unix_start_incoming_migration(const char *path
, Error
**errp
);
73 void unix_start_outgoing_migration(MigrationState
*s
, const char *path
, Error
**errp
);
75 void fd_start_incoming_migration(const char *path
, Error
**errp
);
77 void fd_start_outgoing_migration(MigrationState
*s
, const char *fdname
, Error
**errp
);
79 void migrate_fd_error(MigrationState
*s
);
81 void migrate_fd_connect(MigrationState
*s
);
83 int migrate_fd_close(MigrationState
*s
);
85 void add_migration_state_change_notifier(Notifier
*notify
);
86 void remove_migration_state_change_notifier(Notifier
*notify
);
87 bool migration_is_active(MigrationState
*);
88 bool migration_has_finished(MigrationState
*);
89 bool migration_has_failed(MigrationState
*);
90 MigrationState
*migrate_get_current(void);
92 uint64_t ram_bytes_remaining(void);
93 uint64_t ram_bytes_transferred(void);
94 uint64_t ram_bytes_total(void);
96 void acct_update_position(QEMUFile
*f
, size_t size
, bool zero
);
98 extern SaveVMHandlers savevm_ram_handlers
;
100 uint64_t dup_mig_bytes_transferred(void);
101 uint64_t dup_mig_pages_transferred(void);
102 uint64_t skipped_mig_bytes_transferred(void);
103 uint64_t skipped_mig_pages_transferred(void);
104 uint64_t norm_mig_bytes_transferred(void);
105 uint64_t norm_mig_pages_transferred(void);
106 uint64_t xbzrle_mig_bytes_transferred(void);
107 uint64_t xbzrle_mig_pages_transferred(void);
108 uint64_t xbzrle_mig_pages_overflow(void);
109 uint64_t xbzrle_mig_pages_cache_miss(void);
112 * @migrate_add_blocker - prevent migration from proceeding
114 * @reason - an error to be returned whenever migration is attempted
116 void migrate_add_blocker(Error
*reason
);
119 * @migrate_del_blocker - remove a blocking error from migration
121 * @reason - the error blocking migration
123 void migrate_del_blocker(Error
*reason
);
125 int xbzrle_encode_buffer(uint8_t *old_buf
, uint8_t *new_buf
, int slen
,
126 uint8_t *dst
, int dlen
);
127 int xbzrle_decode_buffer(uint8_t *src
, int slen
, uint8_t *dst
, int dlen
);
129 int migrate_use_xbzrle(void);
130 int64_t migrate_xbzrle_cache_size(void);
132 int64_t xbzrle_cache_resize(int64_t new_size
);