LU-11011 osc: add preferred checksum type support

[fs/lustre-release.git] / lustre / include / obd_cksum.h

diff --git a/lustre/include/obd_cksum.h b/lustre/include/obd_cksum.h
index 6e807d7..15353a3 100644 (file)
--- a/lustre/include/obd_cksum.h
+++ b/lustre/include/obd_cksum.h
@@ -112,10 +112,17 @@ enum cksum_types obd_cksum_types_supported_server(const char *obd_name);
  * checksum type due to its benchmarking at libcfs module load.
  * Caution is advised, however, since what is fastest on a single client may
  * not be the fastest or most efficient algorithm on the server.  */
-static inline enum cksum_types
-obd_cksum_type_select(const char *obd_name, enum cksum_types cksum_types)
+static inline
+enum cksum_types obd_cksum_type_select(const char *obd_name,
+                                      enum cksum_types cksum_types,
+                                      enum cksum_types preferred)
 {
-       u32 flag = obd_cksum_type_pack(obd_name, cksum_types);
+       u32 flag;
+
+       if (preferred & cksum_types)
+               return preferred;
+
+       flag = obd_cksum_type_pack(obd_name, cksum_types);
 
        return obd_cksum_type_unpack(flag);
 }