qemu

FORK: QEMU emulator
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blocker.h (1471B)

      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_add_blocker_internal - prevent migration from proceeding without
     30  *                                 only-migrate implications
     31  *
     32  * @reason - an error to be returned whenever migration is attempted
     33  *
     34  * @errp - [out] The reason (if any) we cannot block migration right now.
     35  *
     36  * @returns - 0 on success, -EBUSY on failure, with errp set.
     37  *
     38  * Some of the migration blockers can be temporary (e.g., for a few seconds),
     39  * so it shouldn't need to conflict with "-only-migratable".  For those cases,
     40  * we can call this function rather than @migrate_add_blocker().
     41  */
     42 int migrate_add_blocker_internal(Error *reason, Error **errp);
     43 
     44 /**
     45  * @migrate_del_blocker - remove a blocking error from migration
     46  *
     47  * @reason - the error blocking migration
     48  */
     49 void migrate_del_blocker(Error *reason);
     50 
     51 #endif