1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/llite/llite_fid.c
38 * Lustre Light Super operations
41 #define DEBUG_SUBSYSTEM S_LLITE
43 #include <linux/module.h>
44 #include <linux/types.h>
45 #include <linux/random.h>
46 #include <linux/version.h>
48 #include <lustre_fid.h>
49 #include <lustre_lite.h>
50 #include <lustre_ha.h>
51 #include <lustre_ver.h>
52 #include <lustre_dlm.h>
53 #include <lustre_disk.h>
54 #include "llite_internal.h"
56 /* Build inode number on passed @fid */
57 ino_t ll_fid_build_ino(struct ll_sb_info *sbi,
63 if (fid_is_igif(fid)) {
64 ino = lu_igif_ino(fid);
69 * Very stupid and having many downsides inode allocation algorithm
72 ino = fid_flatten(fid) & 0xFFFFFFFF;
74 if (unlikely(ino == 0))
75 /* the first result ino is 0xFFC001, so this is rarely used */
77 ino = ino | 0x80000000;