| /* |
| * 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); |