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migration: disallow migrate_add_blocker during migration

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If a migration is already in progress and somebody attempts
to add a migration blocker, this should rightly fail.

Add an errp parameter and a retcode return value to migrate_add_blocker.

Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Ashijeet Acharya <ashijeetacharya@gmail.com>
Message-Id: <1484566314-3987-5-git-send-email-ashijeetacharya@gmail.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  Merged with recent 'Allow invtsc migration' change
This commit is contained in:
Ashijeet Acharya 2017-01-16 17:01:53 +05:30 • committed by Dr. David Alan Gilbert
parent a3a3d8c738
commit fe44dc9180
18 changed files with 222 additions and 81 deletions
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3
stubs/migr-blocker.c
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@ -2,8 +2,9 @@
#include "qemu-common.h"
#include "migration/migration.h"
void migrate_add_blocker(Error *reason)
int migrate_add_blocker(Error *reason, Error **errp)
{
return 0;
}
void migrate_del_blocker(Error *reason)