dm table: allow targets to support discards internally

[pandora-kernel.git] / include / linux / device-mapper.h

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 32a4423..4427e04 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -191,6 +191,12 @@ struct dm_target {
 
        /* Used to provide an error string from the ctr */
        char *error;
+
+       /*
+        * Set if this target needs to receive discards regardless of
+        * whether or not its underlying devices have support.
+        */
+       unsigned discards_supported:1;
 };
 
 /* Each target can link one of these into the table */