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 "qemu-common.h"
  18
  19 #define MIG_STATE_ERROR         -1
  20 #define MIG_STATE_COMPLETED     0
  21 #define MIG_STATE_CANCELLED     1
  22 #define MIG_STATE_ACTIVE        2
  23
  24 typedef struct MigrationState MigrationState;
  25
  26 struct MigrationState
  27 {
  28     /* FIXME: add more accessors to print migration info */
  29     void (*cancel)(MigrationState *s);
  30     int (*get_status)(MigrationState *s);
  31     void (*release)(MigrationState *s);
  32 };
  33
  34 typedef struct FdMigrationState FdMigrationState;
  35
  36 struct FdMigrationState
  37 {
  38     MigrationState mig_state;
  39     int64_t bandwidth_limit;
  40     QEMUFile *file;
  41     int fd;
  42     Monitor *mon_resume;
  43     int state;
  44     int (*get_error)(struct FdMigrationState*);
  45     int (*close)(struct FdMigrationState*);
  46     int (*write)(struct FdMigrationState*, const void *, size_t);
  47     void *opaque;
  48 };
  49
  50 void qemu_start_incoming_migration(const char *uri);
  51
  52 void do_migrate(Monitor *mon, int detach, const char *uri);
  53
  54 void do_migrate_cancel(Monitor *mon);
  55
  56 void do_migrate_set_speed(Monitor *mon, const char *value);
  57
  58 uint64_t migrate_max_downtime(void);
  59
  60 void do_migrate_set_downtime(Monitor *mon, const char *value);
  61
  62 void do_info_migrate(Monitor *mon);
  63
  64 int exec_start_incoming_migration(const char *host_port);
  65
  66 MigrationState *exec_start_outgoing_migration(const char *host_port,
  67                                              int64_t bandwidth_limit,
  68                                              int detach);
  69
  70 int tcp_start_incoming_migration(const char *host_port);
  71
  72 MigrationState *tcp_start_outgoing_migration(const char *host_port,
  73                                              int64_t bandwidth_limit,
  74                                              int detach);
  75
  76 int unix_start_incoming_migration(const char *path);
  77
  78 MigrationState *unix_start_outgoing_migration(const char *path,
  79                                               int64_t bandwidth_limit,
  80                                               int detach);
  81
  82 void migrate_fd_monitor_suspend(FdMigrationState *s);
  83
  84 void migrate_fd_error(FdMigrationState *s);
  85
  86 void migrate_fd_cleanup(FdMigrationState *s);
  87
  88 void migrate_fd_put_notify(void *opaque);
  89
  90 ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size);
  91
  92 void migrate_fd_connect(FdMigrationState *s);
  93
  94 void migrate_fd_put_ready(void *opaque);
  95
  96 int migrate_fd_get_status(MigrationState *mig_state);
  97
  98 void migrate_fd_cancel(MigrationState *mig_state);
  99
 100 void migrate_fd_release(MigrationState *mig_state);
 101
 102 void migrate_fd_wait_for_unfreeze(void *opaque);
 103
 104 int migrate_fd_close(void *opaque);
 105
 106 static inline FdMigrationState *migrate_to_fms(MigrationState *mig_state)
 107 {
 108     return container_of(mig_state, FdMigrationState, mig_state);
 109 }
 110
 111 #endif