Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / fid / fid_lib.c

diff --git a/kernel/drivers/staging/lustre/lustre/fid/fid_lib.c b/kernel/drivers/staging/lustre/lustre/fid/fid_lib.c
new file mode 100644 (file)
index 0000000..dd65159
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/fid/fid_lib.c
@@ -0,0 +1,95 @@
+/*
+ * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/fid/fid_lib.c
+ *
+ * Miscellaneous fid functions.
+ *
+ * Author: Nikita Danilov <nikita@clusterfs.com>
+ * Author: Yury Umanets <umka@clusterfs.com>
+ */
+
+#define DEBUG_SUBSYSTEM S_FID
+
+#include "../../include/linux/libcfs/libcfs.h"
+#include <linux/module.h>
+#include "../include/lustre/lustre_idl.h"
+#include "../include/lustre_fid.h"
+
+/**
+ * A cluster-wide range from which fid-sequences are granted to servers and
+ * then clients.
+ *
+ * Fid namespace:
+ * <pre>
+ * Normal FID:        seq:64 [2^33,2^64-1]      oid:32          ver:32
+ * IGIF      :        0:32, ino:32              gen:32          0:32
+ * IDIF      :        0:31, 1:1, ost-index:16,  objd:48         0:32
+ * </pre>
+ *
+ * The first 0x400 sequences of normal FID are reserved for special purpose.
+ * FID_SEQ_START + 1 is for local file id generation.
+ * FID_SEQ_START + 2 is for .lustre directory and its objects
+ */
+const struct lu_seq_range LUSTRE_SEQ_SPACE_RANGE = {
+       FID_SEQ_NORMAL,
+       (__u64)~0ULL
+};
+EXPORT_SYMBOL(LUSTRE_SEQ_SPACE_RANGE);
+
+/* Zero range, used for init and other purposes. */
+const struct lu_seq_range LUSTRE_SEQ_ZERO_RANGE = {
+       0,
+       0
+};
+EXPORT_SYMBOL(LUSTRE_SEQ_ZERO_RANGE);
+
+/* Lustre Big Fs Lock fid. */
+const struct lu_fid LUSTRE_BFL_FID = { .f_seq = FID_SEQ_SPECIAL,
+                                      .f_oid = FID_OID_SPECIAL_BFL,
+                                      .f_ver = 0x0000000000000000 };
+EXPORT_SYMBOL(LUSTRE_BFL_FID);
+
+/** Special fid for ".lustre" directory */
+const struct lu_fid LU_DOT_LUSTRE_FID = { .f_seq = FID_SEQ_DOT_LUSTRE,
+                                         .f_oid = FID_OID_DOT_LUSTRE,
+                                         .f_ver = 0x0000000000000000 };
+EXPORT_SYMBOL(LU_DOT_LUSTRE_FID);
+
+/** Special fid for "fid" special object in .lustre */
+const struct lu_fid LU_OBF_FID = { .f_seq = FID_SEQ_DOT_LUSTRE,
+                                  .f_oid = FID_OID_DOT_LUSTRE_OBF,
+                                  .f_ver = 0x0000000000000000 };
+EXPORT_SYMBOL(LU_OBF_FID);