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migration: per-mode blockers

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Extend the blocker interface so that a blocker can be registered for
one or more migration modes.  The existing interfaces register a
blocker for all modes, and the new interfaces take a varargs list
of modes.

Internally, maintain a separate blocker list per mode.  The same Error
object may be added to multiple lists.  When a block is deleted, it is
removed from every list, and the Error is freed.

No functional change until a new mode is added.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <1698263069-406971-3-git-send-email-steven.sistare@oracle.com>
This commit is contained in:
Steve Sistare
2023-10-25 12:44:25 -07:00
committed by Juan Quintela
parent eea1e5c9d6
commit fa3673e497
3 changed files with 135 additions and 20 deletions
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stubs/migr-blocker.c
+10
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@@ -6,6 +6,16 @@ int migrate_add_blocker(Error **reasonp, Error **errp)
return 0;
}
int migrate_add_blocker_normal(Error **reasonp, Error **errp)
{
return 0;
}
int migrate_add_blocker_modes(Error **reasonp, Error **errp, MigMode mode, ...)
{
return 0;
}
void migrate_del_blocker(Error **reasonp)
{
}