X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ffid%2Ffid_lib.c;h=5db738c7a8519b8b7658eeb53a1d5456ccf8e129;hb=e655d8abdcecc60c80ff43ac291943d4da1488b5;hp=1efb87aa8b5df5dc3b0f17bb7e1abdc38075df5e;hpb=c37a7e75cdd3d9a51d83e0657b3f03d907ba89f7;p=fs%2Flustre-release.git diff --git a/lustre/fid/fid_lib.c b/lustre/fid/fid_lib.c index 1efb87a..5db738c 100644 --- a/lustre/fid/fid_lib.c +++ b/lustre/fid/fid_lib.c @@ -1,115 +1,105 @@ -/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- - * vim:expandtab:shiftwidth=8:tabstop=8: +/* + * 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). * - * lustre/fid/fid_lib.c - * Miscellaneous fid functions. + * 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 * - * Copyright (c) 2006 Cluster File Systems, Inc. - * Author: Nikita Danilov - * Yury Umanets + * 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. * - * This file is part of the Lustre file system, http://www.lustre.org - * Lustre is a trademark of Cluster File Systems, Inc. + * Copyright (c) 2012, 2014, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. * - * You may have signed or agreed to another license before downloading - * this software. If so, you are bound by the terms and conditions - * of that agreement, and the following does not apply to you. See the - * LICENSE file included with this distribution for more information. + * lustre/fid/fid_lib.c * - * If you did not agree to a different license, then this copy of Lustre - * is open source software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. + * Miscellaneous fid functions. * - * In either case, Lustre 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 - * license text for more details. + * Author: Nikita Danilov + * Author: Yury Umanets */ -#ifndef EXPORT_SYMTAB -# define EXPORT_SYMTAB -#endif #define DEBUG_SUBSYSTEM S_FID -#ifdef __KERNEL__ -# include -# include -#else /* __KERNEL__ */ -# include -#endif - -#include -#include +#include +#include +#include #include -/* - * Sequence space, starts from 0x100000000ULL to have first 0x100000000ULL - * sequences used for special purposes. - * Those fids are reserved for special purposes (igifs, etc.). +/** + * 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_range LUSTRE_SEQ_SPACE_RANGE = { - (0x400), - ((__u64)~0ULL) +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_range LUSTRE_SEQ_ZERO_RANGE = { +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 = 0x0000000000000003, - .f_oid = 0x0000000000000001, +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); -void range_cpu_to_le(struct lu_range *dst, const struct lu_range *src) -{ - /* check that all fields are converted */ - CLASSERT(sizeof *src == - sizeof src->lr_start + - sizeof src->lr_end); - dst->lr_start = cpu_to_le64(src->lr_start); - dst->lr_end = cpu_to_le64(src->lr_end); -} -EXPORT_SYMBOL(range_cpu_to_le); - -void range_le_to_cpu(struct lu_range *dst, const struct lu_range *src) -{ - /* check that all fields are converted */ - CLASSERT(sizeof *src == - sizeof src->lr_start + - sizeof src->lr_end); - dst->lr_start = le64_to_cpu(src->lr_start); - dst->lr_end = le64_to_cpu(src->lr_end); -} -EXPORT_SYMBOL(range_le_to_cpu); +/** 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); -#ifdef __KERNEL__ -void range_cpu_to_be(struct lu_range *dst, const struct lu_range *src) -{ - /* check that all fields are converted */ - CLASSERT(sizeof *src == - sizeof src->lr_start + - sizeof src->lr_end); - dst->lr_start = cpu_to_be64(src->lr_start); - dst->lr_end = cpu_to_be64(src->lr_end); -} -EXPORT_SYMBOL(range_cpu_to_be); +/** 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); -void range_be_to_cpu(struct lu_range *dst, const struct lu_range *src) -{ - /* check that all fields are converted */ - CLASSERT(sizeof *src == - sizeof src->lr_start + - sizeof src->lr_end); - dst->lr_start = be64_to_cpu(src->lr_start); - dst->lr_end = be64_to_cpu(src->lr_end); -} -EXPORT_SYMBOL(range_be_to_cpu); +/** 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); -#endif +/** "/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);