migration.h

   1 /*
   2  * QEMU live migration
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_MIGRATION_H
  15 #define QEMU_MIGRATION_H
  16
  17 #include "qdict.h"
  18 #include "qemu-common.h"
  19 #include "notify.h"
  20
  21 typedef struct MigrationState MigrationState;
  22
  23 struct MigrationState
  24 {
  25     int64_t bandwidth_limit;
  26     QEMUFile *file;
  27     int fd;
  28     Monitor *mon;
  29     int state;
  30     int (*get_error)(MigrationState *s);
  31     int (*close)(MigrationState *s);
  32     int (*write)(MigrationState *s, const void *buff, size_t size);
  33     void *opaque;
  34     int blk;
  35     int shared;
  36 };
  37
  38 void process_incoming_migration(QEMUFile *f);
  39
  40 int qemu_start_incoming_migration(const char *uri);
  41
  42 int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
  43
  44 int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
  45
  46 int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data);
  47
  48 uint64_t migrate_max_downtime(void);
  49
  50 int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
  51                             QObject **ret_data);
  52
  53 void do_info_migrate_print(Monitor *mon, const QObject *data);
  54
  55 void do_info_migrate(Monitor *mon, QObject **ret_data);
  56
  57 int exec_start_incoming_migration(const char *host_port);
  58
  59 int exec_start_outgoing_migration(MigrationState *s, const char *host_port);
  60
  61 int tcp_start_incoming_migration(const char *host_port);
  62
  63 int tcp_start_outgoing_migration(MigrationState *s, const char *host_port);
  64
  65 int unix_start_incoming_migration(const char *path);
  66
  67 int unix_start_outgoing_migration(MigrationState *s, const char *path);
  68
  69 int fd_start_incoming_migration(const char *path);
  70
  71 int fd_start_outgoing_migration(MigrationState *s, const char *fdname);
  72
  73 void migrate_fd_error(MigrationState *s);
  74
  75 void migrate_fd_connect(MigrationState *s);
  76
  77 void add_migration_state_change_notifier(Notifier *notify);
  78 void remove_migration_state_change_notifier(Notifier *notify);
  79 bool migration_is_active(MigrationState *);
  80 bool migration_has_finished(MigrationState *);
  81 bool migration_has_failed(MigrationState *);
  82
  83 uint64_t ram_bytes_remaining(void);
  84 uint64_t ram_bytes_transferred(void);
  85 uint64_t ram_bytes_total(void);
  86
  87 int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque);
  88 int ram_load(QEMUFile *f, void *opaque, int version_id);
  89
  90 extern int incoming_expected;
  91
  92 #endif