4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/fid/fid_lib.c
38 * Miscellaneous fid functions.
40 * Author: Nikita Danilov <nikita@clusterfs.com>
41 * Author: Yury Umanets <umka@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_FID
46 #include <libcfs/libcfs.h>
47 #include <linux/module.h>
48 #include <lustre/lustre_idl.h>
49 #include <lustre_fid.h>
52 * A cluster-wide range from which fid-sequences are granted to servers and
57 * Normal FID: seq:64 [2^33,2^64-1] oid:32 ver:32
58 * IGIF : 0:32, ino:32 gen:32 0:32
59 * IDIF : 0:31, 1:1, ost-index:16, objd:48 0:32
62 * The first 0x400 sequences of normal FID are reserved for special purpose.
63 * FID_SEQ_START + 1 is for local file id generation.
64 * FID_SEQ_START + 2 is for .lustre directory and its objects
66 const struct lu_seq_range LUSTRE_SEQ_SPACE_RANGE = {
70 EXPORT_SYMBOL(LUSTRE_SEQ_SPACE_RANGE);
72 /* Zero range, used for init and other purposes. */
73 const struct lu_seq_range LUSTRE_SEQ_ZERO_RANGE = {
77 EXPORT_SYMBOL(LUSTRE_SEQ_ZERO_RANGE);
79 /* Lustre Big Fs Lock fid. */
80 const struct lu_fid LUSTRE_BFL_FID = { .f_seq = FID_SEQ_SPECIAL,
81 .f_oid = FID_OID_SPECIAL_BFL,
82 .f_ver = 0x0000000000000000 };
83 EXPORT_SYMBOL(LUSTRE_BFL_FID);
85 /** Special fid for ".lustre" directory */
86 const struct lu_fid LU_DOT_LUSTRE_FID = { .f_seq = FID_SEQ_DOT_LUSTRE,
87 .f_oid = FID_OID_DOT_LUSTRE,
88 .f_ver = 0x0000000000000000 };
89 EXPORT_SYMBOL(LU_DOT_LUSTRE_FID);
91 /** Special fid for "fid" special object in .lustre */
92 const struct lu_fid LU_OBF_FID = { .f_seq = FID_SEQ_DOT_LUSTRE,
93 .f_oid = FID_OID_DOT_LUSTRE_OBF,
94 .f_ver = 0x0000000000000000 };
95 EXPORT_SYMBOL(LU_OBF_FID);
97 /** Special fid for "lost+found" special object in .lustre */
98 const struct lu_fid LU_LPF_FID = { .f_seq = FID_SEQ_DOT_LUSTRE,
99 .f_oid = FID_OID_DOT_LUSTRE_LPF,
100 .f_ver = 0x0000000000000000 };
101 EXPORT_SYMBOL(LU_LPF_FID);