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/*
* 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 <linux/libcfs/libcfs.h>
# include <linux/module.h>
#include <obd.h>
#include <lu_object.h>
#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);
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