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 };
  34
  35 typedef struct FdMigrationState FdMigrationState;
  36
  37 struct FdMigrationState
  38 {
  39     MigrationState mig_state;
  40     int64_t bandwidth_limit;
  41     QEMUFile *file;
  42     int fd;
  43     Monitor *mon_resume;
  44     int state;
  45     int (*get_error)(struct FdMigrationState*);
  46     int (*close)(struct FdMigrationState*);
  47     int (*write)(struct FdMigrationState*, const void *, size_t);
  48     void *opaque;
  49 };
  50
  51 void qemu_start_incoming_migration(const char *uri);
  52
  53 void do_migrate(Monitor *mon, int detach, const char *uri);
  54
  55 void do_migrate_cancel(Monitor *mon, const QDict *qdict);
  56
  57 void do_migrate_set_speed(Monitor *mon, const QDict *qdict);
  58
  59 uint64_t migrate_max_downtime(void);
  60
  61 void do_migrate_set_downtime(Monitor *mon, const QDict *qdict);
  62
  63 void do_info_migrate(Monitor *mon);
  64
  65 int exec_start_incoming_migration(const char *host_port);
  66
  67 MigrationState *exec_start_outgoing_migration(const char *host_port,
  68                                              int64_t bandwidth_limit,
  69                                              int detach);
  70
  71 int tcp_start_incoming_migration(const char *host_port);
  72
  73 MigrationState *tcp_start_outgoing_migration(const char *host_port,
  74                                              int64_t bandwidth_limit,
  75                                              int detach);
  76
  77 int unix_start_incoming_migration(const char *path);
  78
  79 MigrationState *unix_start_outgoing_migration(const char *path,
  80                                               int64_t bandwidth_limit,
  81                                               int detach);
  82
  83 int fd_start_incoming_migration(const char *path);
  84
  85 MigrationState *fd_start_outgoing_migration(Monitor *mon,
  86                                             const char *fdname,
  87                                             int64_t bandwidth_limit,
  88                                             int detach);
  89
  90 void migrate_fd_monitor_suspend(FdMigrationState *s);
  91
  92 void migrate_fd_error(FdMigrationState *s);
  93
  94 void migrate_fd_cleanup(FdMigrationState *s);
  95
  96 void migrate_fd_put_notify(void *opaque);
  97
  98 ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);
  99
 100 void migrate_fd_connect(FdMigrationState *s);
 101
 102 void migrate_fd_put_ready(void *opaque);
 103
 104 int migrate_fd_get_status(MigrationState *mig_state);
 105
 106 void migrate_fd_cancel(MigrationState *mig_state);
 107
 108 void migrate_fd_release(MigrationState *mig_state);
 109
 110 void migrate_fd_wait_for_unfreeze(void *opaque);
 111
 112 int migrate_fd_close(void *opaque);
 113
 114 static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)
 115 {
 116     return container_of(mig_state, FdMigrationState, mig_state);
 117 }
 118
 119 #endif