include/migration/register.h

   1 /*
   2  * QEMU migration vmstate registration
   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 MIGRATION_REGISTER_H
  15 #define MIGRATION_REGISTER_H
  16
  17 typedef struct SaveVMHandlers {
  18     /* This runs inside the iothread lock.  */
  19     SaveStateHandler *save_state;
  20
  21     void (*cleanup)(void *opaque);
  22     int (*save_live_complete_postcopy)(QEMUFile *f, void *opaque);
  23     int (*save_live_complete_precopy)(QEMUFile *f, void *opaque);
  24
  25     /* This runs both outside and inside the iothread lock.  */
  26     bool (*is_active)(void *opaque);
  27
  28     /* This runs outside the iothread lock in the migration case, and
  29      * within the lock in the savevm case.  The callback had better only
  30      * use data that is local to the migration thread or protected
  31      * by other locks.
  32      */
  33     int (*save_live_iterate)(QEMUFile *f, void *opaque);
  34
  35     /* This runs outside the iothread lock!  */
  36     int (*save_live_setup)(QEMUFile *f, void *opaque);
  37     void (*save_live_pending)(QEMUFile *f, void *opaque,
  38                               uint64_t threshold_size,
  39                               uint64_t *non_postcopiable_pending,
  40                               uint64_t *postcopiable_pending);
  41     LoadStateHandler *load_state;
  42 } SaveVMHandlers;
  43
  44 int register_savevm_live(DeviceState *dev,
  45                          const char *idstr,
  46                          int instance_id,
  47                          int version_id,
  48                          SaveVMHandlers *ops,
  49                          void *opaque);
  50
  51 void unregister_savevm(DeviceState *dev, const char *idstr, void *opaque);
  52
  53 #endif