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
  20 #define MIG_STATE_ERROR         -1
  21 #define MIG_STATE_COMPLETED     0
  22 #define MIG_STATE_CANCELLED     1
  23 #define MIG_STATE_ACTIVE        2
  24
  25 typedef struct MigrationState MigrationState;
  26
  27 struct MigrationState
  28 {
  29     /* FIXME: add more accessors to print migration info */
  30     void (*cancel)(MigrationState *s);
  31     int (*get_status)(MigrationState *s);
  32     void (*release)(MigrationState *s);
  33     int blk;
  34     int shared;
  35 };
  36
  37 typedef struct FdMigrationState FdMigrationState;
  38
  39 struct FdMigrationState
  40 {
  41     MigrationState mig_state;
  42     int64_t bandwidth_limit;
  43     QEMUFile *file;
  44     int fd;
  45     Monitor *mon;
  46     int state;
  47     int (*get_error)(struct FdMigrationState*);
  48     int (*close)(struct FdMigrationState*);
  49     int (*write)(struct FdMigrationState*, const void *, size_t);
  50     void *opaque;
  51 };
  52
  53 void qemu_start_incoming_migration(const char *uri);
  54
  55 void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
  56
  57 void do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
  58
  59 void do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data);
  60
  61 uint64_t migrate_max_downtime(void);
  62
  63 void do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
  64                              QObject **ret_data);
  65
  66 void do_info_migrate_print(Monitor *mon, const QObject *data);
  67
  68 void do_info_migrate(Monitor *mon, QObject **ret_data);
  69
  70 int exec_start_incoming_migration(const char *host_port);
  71
  72 MigrationState *exec_start_outgoing_migration(Monitor *mon,
  73                                               const char *host_port,
  74                                               int64_t bandwidth_limit,
  75                                               int detach,
  76                                               int blk,
  77                                               int inc);
  78
  79 int tcp_start_incoming_migration(const char *host_port);
  80
  81 MigrationState *tcp_start_outgoing_migration(Monitor *mon,
  82                                              const char *host_port,
  83                                              int64_t bandwidth_limit,
  84                                              int detach,
  85                                              int blk,
  86                                              int inc);
  87
  88 int unix_start_incoming_migration(const char *path);
  89
  90 MigrationState *unix_start_outgoing_migration(Monitor *mon,
  91                                               const char *path,
  92                                               int64_t bandwidth_limit,
  93                                               int detach,
  94                                               int blk,
  95                                               int inc);
  96
  97 int fd_start_incoming_migration(const char *path);
  98
  99 MigrationState *fd_start_outgoing_migration(Monitor *mon,
 100                                             const char *fdname,
 101                                             int64_t bandwidth_limit,
 102                                             int detach,
 103                                             int blk,
 104                                             int inc);
 105
 106 void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon);
 107
 108 void migrate_fd_error(FdMigrationState *s);
 109
 110 void migrate_fd_cleanup(FdMigrationState *s);
 111
 112 void migrate_fd_put_notify(void *opaque);
 113
 114 ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);
 115
 116 void migrate_fd_connect(FdMigrationState *s);
 117
 118 void migrate_fd_put_ready(void *opaque);
 119
 120 int migrate_fd_get_status(MigrationState *mig_state);
 121
 122 void migrate_fd_cancel(MigrationState *mig_state);
 123
 124 void migrate_fd_release(MigrationState *mig_state);
 125
 126 void migrate_fd_wait_for_unfreeze(void *opaque);
 127
 128 int migrate_fd_close(void *opaque);
 129
 130 static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)
 131 {
 132     return container_of(mig_state, FdMigrationState, mig_state);
 133 }
 134
 135 #endif