include/migration/blocker.h

   1 /*
   2  * QEMU migration blockers
   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_BLOCKER_H
  15 #define MIGRATION_BLOCKER_H
  16
  17 /**
  18  * @migrate_add_blocker - prevent migration from proceeding
  19  *
  20  * @reason - an error to be returned whenever migration is attempted
  21  *
  22  * @errp - [out] The reason (if any) we cannot block migration right now.
  23  *
  24  * @returns - 0 on success, -EBUSY/-EACCES on failure, with errp set.
  25  */
  26 int migrate_add_blocker(Error *reason, Error **errp);
  27
  28 /**
  29  * @migrate_del_blocker - remove a blocking error from migration
  30  *
  31  * @reason - the error blocking migration
  32  */
  33 void migrate_del_blocker(Error *reason);
  34
  35 #endif