/* * 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.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2012, 2014, 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 * Author: Yury Umanets */ #define DEBUG_SUBSYSTEM S_FID #include #include #include /** * A cluster-wide range from which fid-sequences are granted to servers and * then clients. * * Fid namespace: *
 * 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
 * 
* * 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 = { .lsr_start = FID_SEQ_NORMAL, .lsr_end = (__u64)~0ULL, }; /* Zero range, used for init and other purposes. */ const struct lu_seq_range LUSTRE_SEQ_ZERO_RANGE = { .lsr_start = 0, }; /* 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); /** Special fid for "lost+found" special object in .lustre */ const struct lu_fid LU_LPF_FID = { .f_seq = FID_SEQ_DOT_LUSTRE, .f_oid = FID_OID_DOT_LUSTRE_LPF, .f_ver = 0x0000000000000000 }; EXPORT_SYMBOL(LU_LPF_FID); /** "/lost+found" - special FID for ldiskfs backend, invislbe to client. */ const struct lu_fid LU_BACKEND_LPF_FID = { .f_seq = FID_SEQ_LOCAL_FILE, .f_oid = OSD_LPF_OID, .f_ver = 0x0000000000000000 }; EXPORT_SYMBOL(LU_BACKEND_LPF_FID);