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-rw-r--r--fs/ceph/crush/mapper.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ceph/crush/mapper.h b/fs/ceph/crush/mapper.h
new file mode 100644
index 000000000000..98e90046fd9f
--- /dev/null
+++ b/fs/ceph/crush/mapper.h
@@ -0,0 +1,20 @@
+#ifndef _CRUSH_MAPPER_H
+#define _CRUSH_MAPPER_H
+
+/*
+ * CRUSH functions for find rules and then mapping an input to an
+ * output set.
+ *
+ * LGPL2
+ */
+
+#include "crush.h"
+
+extern int crush_find_rule(struct crush_map *map, int pool, int type, int size);
+extern int crush_do_rule(struct crush_map *map,
+ int ruleno,
+ int x, int *result, int result_max,
+ int forcefeed, /* -1 for none */
+ __u32 *weights);
+
+#endif