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