1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 * Miscellaneous fid functions.
7 * Copyright (c) 2006 Cluster File Systems, Inc.
8 * Author: Nikita Danilov <nikita@clusterfs.com>
9 * Yury Umanets <umka@clusterfs.com>
11 * This file is part of the Lustre file system, http://www.lustre.org
12 * Lustre is a trademark of Cluster File Systems, Inc.
14 * You may have signed or agreed to another license before downloading
15 * this software. If so, you are bound by the terms and conditions
16 * of that agreement, and the following does not apply to you. See the
17 * LICENSE file included with this distribution for more information.
19 * If you did not agree to a different license, then this copy of Lustre
20 * is open source software; you can redistribute it and/or modify it
21 * under the terms of version 2 of the GNU General Public License as
22 * published by the Free Software Foundation.
24 * In either case, Lustre is distributed in the hope that it will be
25 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
26 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * license text for more details.
31 # define EXPORT_SYMTAB
33 #define DEBUG_SUBSYSTEM S_FID
36 # include <libcfs/libcfs.h>
37 # include <linux/module.h>
38 #else /* __KERNEL__ */
39 # include <liblustre.h>
43 #include <lu_object.h>
44 #include <lustre_fid.h>
47 * A cluster-wide range from which fid-sequences are granted to servers and
52 * Normal FID: seq:64 [2^32,2^64-1] oid:32 ver:32
53 * IGIF : 0:33, ino:31 gen:32 0:32
54 * IDIF : 0:32, 1:1, ost-index:15, objd:48 0:32
57 * The first 0x400 sequences of normal FID are reserved for special purpose.
59 const struct lu_range LUSTRE_SEQ_SPACE_RANGE = {
60 FID_SEQ_START + 0x400ULL,
63 EXPORT_SYMBOL(LUSTRE_SEQ_SPACE_RANGE);
65 /* Zero range, used for init and other purposes. */
66 const struct lu_range LUSTRE_SEQ_ZERO_RANGE = {
70 EXPORT_SYMBOL(LUSTRE_SEQ_ZERO_RANGE);
72 /* Lustre Big Fs Lock fid. */
73 const struct lu_fid LUSTRE_BFL_FID = { .f_seq = 0x0000000000000003,
74 .f_oid = 0x0000000000000001,
75 .f_ver = 0x0000000000000000 };
76 EXPORT_SYMBOL(LUSTRE_BFL_FID);
78 void range_cpu_to_le(struct lu_range *dst, const struct lu_range *src)
80 /* check that all fields are converted */
81 CLASSERT(sizeof *src ==
82 sizeof src->lr_start +
84 dst->lr_start = cpu_to_le64(src->lr_start);
85 dst->lr_end = cpu_to_le64(src->lr_end);
87 EXPORT_SYMBOL(range_cpu_to_le);
89 void range_le_to_cpu(struct lu_range *dst, const struct lu_range *src)
91 /* check that all fields are converted */
92 CLASSERT(sizeof *src ==
93 sizeof src->lr_start +
95 dst->lr_start = le64_to_cpu(src->lr_start);
96 dst->lr_end = le64_to_cpu(src->lr_end);
98 EXPORT_SYMBOL(range_le_to_cpu);
101 void range_cpu_to_be(struct lu_range *dst, const struct lu_range *src)
103 /* check that all fields are converted */
104 CLASSERT(sizeof *src ==
105 sizeof src->lr_start +
107 dst->lr_start = cpu_to_be64(src->lr_start);
108 dst->lr_end = cpu_to_be64(src->lr_end);
110 EXPORT_SYMBOL(range_cpu_to_be);
112 void range_be_to_cpu(struct lu_range *dst, const struct lu_range *src)
114 /* check that all fields are converted */
115 CLASSERT(sizeof *src ==
116 sizeof src->lr_start +
118 dst->lr_start = be64_to_cpu(src->lr_start);
119 dst->lr_end = be64_to_cpu(src->lr_end);
121 EXPORT_SYMBOL(range_be_to_cpu);