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 #include "error.h"
  21
  22 typedef struct MigrationState MigrationState;
  23
  24 struct MigrationState
  25 {
  26     int64_t bandwidth_limit;
  27     QEMUFile *file;
  28     int fd;
  29     Monitor *mon;
  30     int state;
  31     int (*get_error)(MigrationState *s);
  32     int (*close)(MigrationState *s);
  33     int (*write)(MigrationState *s, const void *buff, size_t size);
  34     void *opaque;
  35     int blk;
  36     int shared;
  37 };
  38
  39 void process_incoming_migration(QEMUFile *f);
  40
  41 int qemu_start_incoming_migration(const char *uri);
  42
  43 int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
  44
  45 int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
  46
  47 int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data);
  48
  49 uint64_t migrate_max_downtime(void);
  50
  51 int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
  52                             QObject **ret_data);
  53
  54 void do_info_migrate_print(Monitor *mon, const QObject *data);
  55
  56 void do_info_migrate(Monitor *mon, QObject **ret_data);
  57
  58 int exec_start_incoming_migration(const char *host_port);
  59
  60 int exec_start_outgoing_migration(MigrationState *s, const char *host_port);
  61
  62 int tcp_start_incoming_migration(const char *host_port);
  63
  64 int tcp_start_outgoing_migration(MigrationState *s, const char *host_port);
  65
  66 int unix_start_incoming_migration(const char *path);
  67
  68 int unix_start_outgoing_migration(MigrationState *s, const char *path);
  69
  70 int fd_start_incoming_migration(const char *path);
  71
  72 int fd_start_outgoing_migration(MigrationState *s, const char *fdname);
  73
  74 void migrate_fd_error(MigrationState *s);
  75
  76 void migrate_fd_connect(MigrationState *s);
  77
  78 void add_migration_state_change_notifier(Notifier *notify);
  79 void remove_migration_state_change_notifier(Notifier *notify);
  80 bool migration_is_active(MigrationState *);
  81 bool migration_has_finished(MigrationState *);
  82 bool migration_has_failed(MigrationState *);
  83
  84 uint64_t ram_bytes_remaining(void);
  85 uint64_t ram_bytes_transferred(void);
  86 uint64_t ram_bytes_total(void);
  87
  88 int ram_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque);
  89 int ram_load(QEMUFile *f, void *opaque, int version_id);
  90
  91 extern int incoming_expected;
  92
  93 /**
  94  * @migrate_add_blocker - prevent migration from proceeding
  95  *
  96  * @reason - an error to be returned whenever migration is attempted
  97  */
  98 void migrate_add_blocker(Error *reason);
  99
 100 /**
 101  * @migrate_del_blocker - remove a blocking error from migration
 102  *
 103  * @reason - the error blocking migration
 104  */
 105 void migrate_del_blocker(Error *reason);
 106
 107 #endif