Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / obdclass / uuid.c

diff --git a/kernel/drivers/staging/lustre/lustre/obdclass/uuid.c b/kernel/drivers/staging/lustre/lustre/obdclass/uuid.c
new file mode 100644 (file)
index 0000000..ff0a01b
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/obdclass/uuid.c
@@ -0,0 +1,82 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/uuid.c
+ *
+ * Public include file for the UUID library
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include "../../include/linux/libcfs/libcfs.h"
+
+#include "../include/obd_support.h"
+#include "../include/obd_class.h"
+
+
+static inline __u32 consume(int nob, __u8 **ptr)
+{
+       __u32 value;
+
+       LASSERT(nob <= sizeof(value));
+
+       for (value = 0; nob > 0; --nob)
+               value = (value << 8) | *((*ptr)++);
+       return value;
+}
+
+#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
+
+static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
+{
+       __u8 *ptr = in;
+
+       LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t));
+
+       while (nr-- > 0)
+               CONSUME(uu[nr], &ptr);
+}
+
+void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
+{
+       /* uu as an array of __u16's */
+       __u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
+
+       CLASSERT(ARRAY_SIZE(uuid) == 8);
+
+       uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
+       sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
+               uuid[0], uuid[1], uuid[2], uuid[3],
+               uuid[4], uuid[5], uuid[6], uuid[7]);
+}
+EXPORT_SYMBOL(class_uuid_unparse);