1225 lines
48 KiB
C
1225 lines
48 KiB
C
/* $NetBSD: lfs.h,v 1.196 2015/10/15 06:24:08 dholland Exp $ */
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/* from NetBSD: dinode.h,v 1.22 2013/01/22 09:39:18 dholland Exp */
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/* from NetBSD: dir.h,v 1.21 2009/07/22 04:49:19 dholland Exp */
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/*-
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* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Konrad E. Schroder <perseant@hhhh.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)lfs.h 8.9 (Berkeley) 5/8/95
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*/
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/*
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Marshall
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* Kirk McKusick and Network Associates Laboratories, the Security
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* Research Division of Network Associates, Inc. under DARPA/SPAWAR
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* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
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* research program
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*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
|
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dinode.h 8.9 (Berkeley) 3/29/95
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*/
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)dir.h 8.5 (Berkeley) 4/27/95
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*/
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/*
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* NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT.
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*/
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#ifndef _UFS_LFS_LFS_H_
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#define _UFS_LFS_LFS_H_
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#if !defined(_KERNEL) && !defined(_STANDALONE)
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#include <stddef.h> /* for offsetof */
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#endif
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#include <sys/rwlock.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/condvar.h>
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#include <sys/mount.h>
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#include <sys/pool.h>
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/*
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* Compile-time options for LFS.
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*/
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#define LFS_IFIND_RETRIES 16
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#define LFS_LOGLENGTH 1024 /* size of debugging log */
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#define LFS_MAX_ACTIVE 10 /* Dirty segments before ckp forced */
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/*
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* Fixed filesystem layout parameters
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*/
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#define LFS_LABELPAD 8192 /* LFS label size */
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#define LFS_SBPAD 8192 /* LFS superblock size */
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#define LFS_UNUSED_INUM 0 /* 0: out of band inode number */
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#define LFS_IFILE_INUM 1 /* 1: IFILE inode number */
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/* 2: Root inode number */
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#define LFS_LOSTFOUNDINO 3 /* 3: lost+found inode number */
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#define LFS_FIRST_INUM 4 /* 4: first free inode number */
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/*
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* The root inode is the root of the file system. Inode 0 can't be used for
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* normal purposes and historically bad blocks were linked to inode 1, thus
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* the root inode is 2. (Inode 1 is no longer used for this purpose, however
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* numerous dump tapes make this assumption, so we are stuck with it).
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*/
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#define ULFS_ROOTINO ((ino_t)2)
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/*
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* The Whiteout inode# is a dummy non-zero inode number which will
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* never be allocated to a real file. It is used as a place holder
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* in the directory entry which has been tagged as a LFS_DT_WHT entry.
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* See the comments about ULFS_ROOTINO above.
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*/
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#define ULFS_WINO ((ino_t)1)
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#define LFS_V1_SUMMARY_SIZE 512 /* V1 fixed summary size */
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#define LFS_DFL_SUMMARY_SIZE 512 /* Default summary size */
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#define LFS_MAXNAMLEN 255 /* maximum name length in a dir */
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#define ULFS_NXADDR 2
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#define ULFS_NDADDR 12 /* Direct addresses in inode. */
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#define ULFS_NIADDR 3 /* Indirect addresses in inode. */
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/*
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* Adjustable filesystem parameters
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*/
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#ifndef LFS_ATIME_IFILE
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# define LFS_ATIME_IFILE 0 /* Store atime info in ifile (optional in LFSv1) */
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#endif
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#define LFS_MARKV_MAXBLKCNT 65536 /* Max block count for lfs_markv() */
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/*
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* Directories
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*/
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/*
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* Directories in LFS are files; they use the same inode and block
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* mapping structures that regular files do. The directory per se is
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* manifested in the file contents: an unordered, unstructured
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* sequence of variable-size directory entries.
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*
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* This format and structure is taken (via what was originally shared
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* ufs-level code) from FFS. Each directory entry is a fixed header
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* followed by a string, the total length padded to a 4-byte boundary.
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* All strings include a null terminator; the maximum string length
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* is LFS_MAXNAMLEN, which is 255.
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*
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* The directory entry header structure (struct lfs_dirheader) is just
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* the header information. A complete entry is this plus a null-
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* terminated name following it, plus some amount of padding. The
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* length of the name (not including the null terminator) is given by
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* the namlen field of the header; the complete record length,
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* including the null terminator and padding, is given by the reclen
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* field of the header. The record length is always 4-byte aligned.
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* (Even on 64-bit volumes, the record length is only 4-byte aligned,
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* not 8-byte.)
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*
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* Historically, FFS directories were/are organized into blocks of
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* size DIRBLKSIZE that can be written atomically to disk at the
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* hardware level. Directory entries are not allowed to cross the
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* boundaries of these blocks. The resulting atomicity is important
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* for the integrity of FFS volumes; however, for LFS it's irrelevant.
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* All we have to care about is not writing out directories that
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* confuse earlier ufs-based versions of the LFS code.
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*
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* This means [to be determined]. (XXX)
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*
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* As DIRBLKSIZE in its FFS sense is hardware-dependent, and file
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* system images do from time to time move to different hardware, code
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* that reads directories should be prepared to handle directories
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* written in a context where DIRBLKSIZE was different (smaller or
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* larger) than its current value. Note however that it is not
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* sensible for DIRBLKSIZE to be larger than the volume fragment size,
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* and not practically possible for it to be larger than the volume
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* block size.
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*
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* Some further notes:
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* - the LFS_DIRSIZ macro provides the minimum space needed to hold
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* a directory entry.
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* - any particular entry may be arbitrarily larger (which is why the
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* header stores both the entry size and the name size) to pad out
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* unused space.
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* - historically the padding in an entry is not necessarily zeroed
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* but may contain trash.
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* - dp->d_reclen is the size of the entry. This is always 4-byte
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* aligned.
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* - dp->d_namlen is the length of the string, and should always be
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* the same as strlen(dp->d_name).
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* - in particular, space available in an entry is given by
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* dp->d_reclen - LFS_DIRSIZ(dp), and all space available within a
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* directory block is tucked away within an existing entry.
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* - all space within a directory block is part of some entry.
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* - therefore, inserting a new entry requires finding and
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* splitting a suitable existing entry, and when entries are
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* removed their space is merged into the entry ahead of them.
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* - an empty/unused entry has d_ino set to 0. This normally only
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* appears in the first entry in a block, as elsewhere the unused
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* entry should have been merged into the one before it. However,
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* fsck leaves such entries behind so they must be tolerated
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* elsewhere.
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* - a completely empty directory block has one entry whose
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* d_reclen is DIRBLKSIZ and whose d_ino is 0.
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*
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* The "old directory format" referenced by the fs->lfs_isolddirfmt
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* flag (and some other things) refers to when the type field was
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* added to directory entries. This change was made to FFS in the 80s,
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* well before LFS was first written; there should be no LFS volumes
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* (and certainly no LFS v2-format volumes or LFS64 volumes) where the
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* old format pertains. All of the related logic should probably be
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* removed; however, it hasn't been yet, and we get to carry it around
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* until we can be conclusively sure it isn't needed.
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*
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* In the "old directory format" there is no type field and the namlen
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* field is correspondingly 16 bits wide. On big-endian volumes this
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* has no effect: namlen cannot exceed 255, so the upper byte is
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* always 0 and this reads back from the type field as LFS_DT_UNKNOWN.
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* On little-endian volumes, the namlen field will always be 0 and
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* the namlen value needs to be read out of the type field. (The type
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* is always LFS_DT_UNKNOWN.) The directory accessor functions take
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* care of this so nothing else needs to be aware of it.
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*
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* LFS_OLDDIRFMT and LFS_NEWDIRFMT are code numbers for the old and
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* new directory format respectively. These codes do not appear on
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* disk; they're generated from a runtime macro called FSFMT() that's
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* cued by other things. This is why (confusingly) LFS_OLDDIRFMT is 1
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* and LFS_NEWDIRFMT is 0.
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*
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* FSFMT(), LFS_OLDDIRFMT, and LFS_NEWDIRFMT should be removed. (XXX)
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*/
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/*
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* Directory block size.
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*/
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#undef LFS_DIRBLKSIZ
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#define LFS_DIRBLKSIZ DEV_BSIZE
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/*
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* Convert between stat structure type codes and directory entry type codes.
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*/
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#define LFS_IFTODT(mode) (((mode) & 0170000) >> 12)
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#define LFS_DTTOIF(dirtype) ((dirtype) << 12)
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/*
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* Theoretically, directories can be more than 2Gb in length; however, in
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* practice this seems unlikely. So, we define the type doff_t as a 32-bit
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* quantity to keep down the cost of doing lookup on a 32-bit machine.
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*/
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#define doff_t int32_t
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#define lfs_doff_t int32_t
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#define LFS_MAXDIRSIZE (0x7fffffff)
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/*
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* File types for d_type
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*/
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#define LFS_DT_UNKNOWN 0
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#define LFS_DT_FIFO 1
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#define LFS_DT_CHR 2
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#define LFS_DT_DIR 4
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#define LFS_DT_BLK 6
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#define LFS_DT_REG 8
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#define LFS_DT_LNK 10
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#define LFS_DT_SOCK 12
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#define LFS_DT_WHT 14
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/*
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* (See notes above)
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*/
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struct lfs_dirheader32 {
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u_int32_t dh_ino; /* inode number of entry */
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u_int16_t dh_reclen; /* length of this record */
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u_int8_t dh_type; /* file type, see below */
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u_int8_t dh_namlen; /* length of string in d_name */
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};
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struct lfs_dirheader64 {
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u_int32_t dh_inoA; /* inode number of entry */
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u_int32_t dh_inoB; /* inode number of entry */
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u_int16_t dh_reclen; /* length of this record */
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u_int8_t dh_type; /* file type, see below */
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u_int8_t dh_namlen; /* length of string in d_name */
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};
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union lfs_dirheader {
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struct lfs_dirheader64 u_64;
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struct lfs_dirheader32 u_32;
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};
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typedef union lfs_dirheader LFS_DIRHEADER;
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/*
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* Template for manipulating directories.
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*/
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struct lfs_dirtemplate32 {
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struct lfs_dirheader32 dot_header;
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char dot_name[4]; /* must be multiple of 4 */
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struct lfs_dirheader32 dotdot_header;
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char dotdot_name[4]; /* ditto */
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};
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struct lfs_dirtemplate64 {
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struct lfs_dirheader64 dot_header;
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char dot_name[4]; /* must be multiple of 4 */
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struct lfs_dirheader64 dotdot_header;
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char dotdot_name[4]; /* ditto */
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};
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union lfs_dirtemplate {
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struct lfs_dirtemplate64 u_64;
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struct lfs_dirtemplate32 u_32;
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};
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#if 0
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/*
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* This is the old format of directories, sans type element.
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*/
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struct lfs_odirtemplate {
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u_int32_t dot_ino;
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int16_t dot_reclen;
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u_int16_t dot_namlen;
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char dot_name[4]; /* must be multiple of 4 */
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u_int32_t dotdot_ino;
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int16_t dotdot_reclen;
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u_int16_t dotdot_namlen;
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char dotdot_name[4]; /* ditto */
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};
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#endif
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/*
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* Inodes
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*/
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/*
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* A dinode contains all the meta-data associated with a LFS file.
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* This structure defines the on-disk format of a dinode. Since
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* this structure describes an on-disk structure, all its fields
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* are defined by types with precise widths.
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*/
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struct lfs32_dinode {
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u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
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int16_t di_nlink; /* 2: File link count. */
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u_int32_t di_inumber; /* 4: Inode number. */
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u_int64_t di_size; /* 8: File byte count. */
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int32_t di_atime; /* 16: Last access time. */
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int32_t di_atimensec; /* 20: Last access time. */
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int32_t di_mtime; /* 24: Last modified time. */
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int32_t di_mtimensec; /* 28: Last modified time. */
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int32_t di_ctime; /* 32: Last inode change time. */
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int32_t di_ctimensec; /* 36: Last inode change time. */
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int32_t di_db[ULFS_NDADDR]; /* 40: Direct disk blocks. */
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int32_t di_ib[ULFS_NIADDR]; /* 88: Indirect disk blocks. */
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u_int32_t di_flags; /* 100: Status flags (chflags). */
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u_int32_t di_blocks; /* 104: Blocks actually held. */
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int32_t di_gen; /* 108: Generation number. */
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u_int32_t di_uid; /* 112: File owner. */
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u_int32_t di_gid; /* 116: File group. */
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|
u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */
|
|
};
|
|
|
|
struct lfs64_dinode {
|
|
u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
|
|
int16_t di_nlink; /* 2: File link count. */
|
|
u_int32_t di_uid; /* 4: File owner. */
|
|
u_int32_t di_gid; /* 8: File group. */
|
|
u_int32_t di_blksize; /* 12: Inode blocksize. */
|
|
u_int64_t di_size; /* 16: File byte count. */
|
|
u_int64_t di_blocks; /* 24: Bytes actually held. */
|
|
int64_t di_atime; /* 32: Last access time. */
|
|
int64_t di_mtime; /* 40: Last modified time. */
|
|
int64_t di_ctime; /* 48: Last inode change time. */
|
|
int64_t di_birthtime; /* 56: Inode creation time. */
|
|
int32_t di_mtimensec; /* 64: Last modified time. */
|
|
int32_t di_atimensec; /* 68: Last access time. */
|
|
int32_t di_ctimensec; /* 72: Last inode change time. */
|
|
int32_t di_birthnsec; /* 76: Inode creation time. */
|
|
int32_t di_gen; /* 80: Generation number. */
|
|
u_int32_t di_kernflags; /* 84: Kernel flags. */
|
|
u_int32_t di_flags; /* 88: Status flags (chflags). */
|
|
int32_t di_extsize; /* 92: External attributes block. */
|
|
int64_t di_extb[ULFS_NXADDR];/* 96: External attributes block. */
|
|
int64_t di_db[ULFS_NDADDR]; /* 112: Direct disk blocks. */
|
|
int64_t di_ib[ULFS_NIADDR]; /* 208: Indirect disk blocks. */
|
|
u_int64_t di_modrev; /* 232: i_modrev for NFSv4 */
|
|
u_int64_t di_inumber; /* 240: Inode number */
|
|
u_int64_t di_spare[1]; /* 244: Reserved; currently unused */
|
|
};
|
|
|
|
union lfs_dinode {
|
|
struct lfs64_dinode u_64;
|
|
struct lfs32_dinode u_32;
|
|
};
|
|
|
|
/*
|
|
* The di_db fields may be overlaid with other information for
|
|
* file types that do not have associated disk storage. Block
|
|
* and character devices overlay the first data block with their
|
|
* dev_t value. Short symbolic links place their path in the
|
|
* di_db area.
|
|
*/
|
|
#define di_rdev di_db[0]
|
|
|
|
/* Size of the on-disk inode. */
|
|
//#define LFS_DINODE1_SIZE (sizeof(struct ulfs1_dinode)) /* 128 */
|
|
//#define LFS_DINODE2_SIZE (sizeof(struct ulfs2_dinode))
|
|
|
|
/* File types, found in the upper bits of di_mode. */
|
|
#define LFS_IFMT 0170000 /* Mask of file type. */
|
|
#define LFS_IFIFO 0010000 /* Named pipe (fifo). */
|
|
#define LFS_IFCHR 0020000 /* Character device. */
|
|
#define LFS_IFDIR 0040000 /* Directory file. */
|
|
#define LFS_IFBLK 0060000 /* Block device. */
|
|
#define LFS_IFREG 0100000 /* Regular file. */
|
|
#define LFS_IFLNK 0120000 /* Symbolic link. */
|
|
#define LFS_IFSOCK 0140000 /* UNIX domain socket. */
|
|
#define LFS_IFWHT 0160000 /* Whiteout. */
|
|
|
|
/*
|
|
* "struct buf" associated definitions
|
|
*/
|
|
|
|
/* Unassigned disk addresses. */
|
|
#define UNASSIGNED -1
|
|
#define UNWRITTEN -2
|
|
|
|
/* Unused logical block number */
|
|
#define LFS_UNUSED_LBN -1
|
|
|
|
/*
|
|
* "struct inode" associated definitions
|
|
*/
|
|
|
|
/* For convenience */
|
|
#define IN_ALLMOD (IN_MODIFIED|IN_ACCESS|IN_CHANGE|IN_UPDATE|IN_MODIFY|IN_ACCESSED|IN_CLEANING)
|
|
|
|
/*
|
|
* On-disk and in-memory checkpoint segment usage structure.
|
|
*/
|
|
typedef struct segusage SEGUSE;
|
|
struct segusage {
|
|
u_int32_t su_nbytes; /* 0: number of live bytes */
|
|
u_int32_t su_olastmod; /* 4: SEGUSE last modified timestamp */
|
|
u_int16_t su_nsums; /* 8: number of summaries in segment */
|
|
u_int16_t su_ninos; /* 10: number of inode blocks in seg */
|
|
|
|
#define SEGUSE_ACTIVE 0x01 /* segment currently being written */
|
|
#define SEGUSE_DIRTY 0x02 /* segment has data in it */
|
|
#define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */
|
|
#define SEGUSE_ERROR 0x08 /* cleaner: do not clean segment */
|
|
#define SEGUSE_EMPTY 0x10 /* segment is empty */
|
|
#define SEGUSE_INVAL 0x20 /* segment is invalid */
|
|
u_int32_t su_flags; /* 12: segment flags */
|
|
u_int64_t su_lastmod; /* 16: last modified timestamp */
|
|
};
|
|
|
|
typedef struct segusage_v1 SEGUSE_V1;
|
|
struct segusage_v1 {
|
|
u_int32_t su_nbytes; /* 0: number of live bytes */
|
|
u_int32_t su_lastmod; /* 4: SEGUSE last modified timestamp */
|
|
u_int16_t su_nsums; /* 8: number of summaries in segment */
|
|
u_int16_t su_ninos; /* 10: number of inode blocks in seg */
|
|
u_int32_t su_flags; /* 12: segment flags */
|
|
};
|
|
|
|
/*
|
|
* On-disk file information. One per file with data blocks in the segment.
|
|
*
|
|
* The FINFO structure is a header; it is followed by fi_nblocks block
|
|
* pointers, which are logical block numbers of the file. (These are the
|
|
* blocks of the file present in this segment.)
|
|
*/
|
|
|
|
typedef struct finfo64 FINFO64;
|
|
struct finfo64 {
|
|
u_int32_t fi_nblocks; /* number of blocks */
|
|
u_int32_t fi_version; /* version number */
|
|
u_int64_t fi_ino; /* inode number */
|
|
u_int32_t fi_lastlength; /* length of last block in array */
|
|
u_int32_t fi_pad; /* unused */
|
|
};
|
|
|
|
typedef struct finfo32 FINFO32;
|
|
struct finfo32 {
|
|
u_int32_t fi_nblocks; /* number of blocks */
|
|
u_int32_t fi_version; /* version number */
|
|
u_int32_t fi_ino; /* inode number */
|
|
u_int32_t fi_lastlength; /* length of last block in array */
|
|
};
|
|
|
|
typedef union finfo {
|
|
struct finfo64 u_64;
|
|
struct finfo32 u_32;
|
|
} FINFO;
|
|
|
|
/*
|
|
* inode info (part of the segment summary)
|
|
*
|
|
* Each one of these is just a block number; wrapping the structure
|
|
* around it gives more contextual information in the code about
|
|
* what's going on.
|
|
*/
|
|
|
|
typedef struct iinfo64 {
|
|
uint64_t ii_block; /* block number */
|
|
} IINFO64;
|
|
|
|
typedef struct iinfo32 {
|
|
uint32_t ii_block; /* block number */
|
|
} IINFO32;
|
|
|
|
typedef union iinfo {
|
|
struct iinfo64 u_64;
|
|
struct iinfo32 u_32;
|
|
} IINFO;
|
|
|
|
/*
|
|
* Index file inode entries.
|
|
*/
|
|
|
|
/* magic value for daddrs */
|
|
#define LFS_UNUSED_DADDR 0 /* out-of-band daddr */
|
|
/* magic value for if_nextfree */
|
|
#define LFS_ORPHAN_NEXTFREE (~(u_int32_t)0) /* indicate orphaned file */
|
|
|
|
typedef struct ifile64 IFILE64;
|
|
struct ifile64 {
|
|
u_int32_t if_version; /* inode version number */
|
|
u_int32_t if_atime_nsec; /* and nanoseconds */
|
|
u_int64_t if_atime_sec; /* Last access time, seconds */
|
|
int64_t if_daddr; /* inode disk address */
|
|
u_int64_t if_nextfree; /* next-unallocated inode */
|
|
};
|
|
|
|
typedef struct ifile32 IFILE32;
|
|
struct ifile32 {
|
|
u_int32_t if_version; /* inode version number */
|
|
int32_t if_daddr; /* inode disk address */
|
|
u_int32_t if_nextfree; /* next-unallocated inode */
|
|
u_int32_t if_atime_sec; /* Last access time, seconds */
|
|
u_int32_t if_atime_nsec; /* and nanoseconds */
|
|
};
|
|
|
|
typedef struct ifile_v1 IFILE_V1;
|
|
struct ifile_v1 {
|
|
u_int32_t if_version; /* inode version number */
|
|
int32_t if_daddr; /* inode disk address */
|
|
u_int32_t if_nextfree; /* next-unallocated inode */
|
|
#if LFS_ATIME_IFILE
|
|
#error "this cannot work"
|
|
struct timespec if_atime; /* Last access time */
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Note: struct ifile_v1 is often handled by accessing the first three
|
|
* fields of struct ifile32. (XXX: Blah. This should be cleaned up as
|
|
* it may in some cases violate the strict-aliasing rules.)
|
|
*/
|
|
typedef union ifile {
|
|
struct ifile64 u_64;
|
|
struct ifile32 u_32;
|
|
struct ifile_v1 u_v1;
|
|
} IFILE;
|
|
|
|
/*
|
|
* Cleaner information structure. This resides in the ifile and is used
|
|
* to pass information from the kernel to the cleaner.
|
|
*/
|
|
|
|
/* flags for ->flags */
|
|
#define LFS_CLEANER_MUST_CLEAN 0x01
|
|
|
|
typedef struct _cleanerinfo32 {
|
|
u_int32_t clean; /* 0: number of clean segments */
|
|
u_int32_t dirty; /* 4: number of dirty segments */
|
|
int32_t bfree; /* 8: disk blocks free */
|
|
int32_t avail; /* 12: disk blocks available */
|
|
u_int32_t free_head; /* 16: head of the inode free list */
|
|
u_int32_t free_tail; /* 20: tail of the inode free list */
|
|
u_int32_t flags; /* 24: status word from the kernel */
|
|
} CLEANERINFO32;
|
|
|
|
typedef struct _cleanerinfo64 {
|
|
u_int32_t clean; /* 0: number of clean segments */
|
|
u_int32_t dirty; /* 4: number of dirty segments */
|
|
int64_t bfree; /* 8: disk blocks free */
|
|
int64_t avail; /* 16: disk blocks available */
|
|
u_int64_t free_head; /* 24: head of the inode free list */
|
|
u_int64_t free_tail; /* 32: tail of the inode free list */
|
|
u_int32_t flags; /* 40: status word from the kernel */
|
|
u_int32_t pad; /* 44: must be 64-bit aligned */
|
|
} CLEANERINFO64;
|
|
|
|
/* this must not go to disk directly of course */
|
|
typedef union _cleanerinfo {
|
|
CLEANERINFO32 u_32;
|
|
CLEANERINFO64 u_64;
|
|
} CLEANERINFO;
|
|
|
|
/*
|
|
* On-disk segment summary information
|
|
*/
|
|
|
|
/* magic value for ss_magic */
|
|
#define SS_MAGIC 0x061561
|
|
|
|
/* flags for ss_flags */
|
|
#define SS_DIROP 0x01 /* segment begins a dirop */
|
|
#define SS_CONT 0x02 /* more partials to finish this write*/
|
|
#define SS_CLEAN 0x04 /* written by the cleaner */
|
|
#define SS_RFW 0x08 /* written by the roll-forward agent */
|
|
#define SS_RECLAIM 0x10 /* written by the roll-forward agent */
|
|
|
|
/* type used for reading checksum signatures from metadata structures */
|
|
typedef uint32_t lfs_checkword;
|
|
|
|
typedef struct segsum_v1 SEGSUM_V1;
|
|
struct segsum_v1 {
|
|
u_int32_t ss_sumsum; /* 0: check sum of summary block */
|
|
u_int32_t ss_datasum; /* 4: check sum of data */
|
|
u_int32_t ss_magic; /* 8: segment summary magic number */
|
|
int32_t ss_next; /* 12: next segment */
|
|
u_int32_t ss_create; /* 16: creation time stamp */
|
|
u_int16_t ss_nfinfo; /* 20: number of file info structures */
|
|
u_int16_t ss_ninos; /* 22: number of inodes in summary */
|
|
u_int16_t ss_flags; /* 24: used for directory operations */
|
|
u_int16_t ss_pad; /* 26: extra space */
|
|
/* FINFO's and inode daddr's... */
|
|
};
|
|
|
|
typedef struct segsum32 SEGSUM32;
|
|
struct segsum32 {
|
|
u_int32_t ss_sumsum; /* 0: check sum of summary block */
|
|
u_int32_t ss_datasum; /* 4: check sum of data */
|
|
u_int32_t ss_magic; /* 8: segment summary magic number */
|
|
int32_t ss_next; /* 12: next segment (disk address) */
|
|
u_int32_t ss_ident; /* 16: roll-forward fsid */
|
|
u_int16_t ss_nfinfo; /* 20: number of file info structures */
|
|
u_int16_t ss_ninos; /* 22: number of inodes in summary */
|
|
u_int16_t ss_flags; /* 24: used for directory operations */
|
|
u_int8_t ss_pad[2]; /* 26: extra space */
|
|
u_int32_t ss_reclino; /* 28: inode being reclaimed */
|
|
u_int64_t ss_serial; /* 32: serial number */
|
|
u_int64_t ss_create; /* 40: time stamp */
|
|
/* FINFO's and inode daddr's... */
|
|
};
|
|
|
|
typedef struct segsum64 SEGSUM64;
|
|
struct segsum64 {
|
|
u_int32_t ss_sumsum; /* 0: check sum of summary block */
|
|
u_int32_t ss_datasum; /* 4: check sum of data */
|
|
u_int32_t ss_magic; /* 8: segment summary magic number */
|
|
u_int32_t ss_ident; /* 12: roll-forward fsid */
|
|
int64_t ss_next; /* 16: next segment (disk address) */
|
|
u_int16_t ss_nfinfo; /* 24: number of file info structures */
|
|
u_int16_t ss_ninos; /* 26: number of inodes in summary */
|
|
u_int16_t ss_flags; /* 28: used for directory operations */
|
|
u_int8_t ss_pad[2]; /* 30: extra space */
|
|
u_int64_t ss_reclino; /* 32: inode being reclaimed */
|
|
u_int64_t ss_serial; /* 40: serial number */
|
|
u_int64_t ss_create; /* 48: time stamp */
|
|
/* FINFO's and inode daddr's... */
|
|
};
|
|
|
|
typedef union segsum SEGSUM;
|
|
union segsum {
|
|
struct segsum64 u_64;
|
|
struct segsum32 u_32;
|
|
struct segsum_v1 u_v1;
|
|
};
|
|
|
|
|
|
/*
|
|
* On-disk super block.
|
|
*
|
|
* We have separate superblock structures for the 32-bit and 64-bit
|
|
* LFS, and accessor functions to hide the differences.
|
|
*
|
|
* For lfs64, the format version is always 2; version 1 lfs is old.
|
|
* For both, the inode format version is 0; for lfs32 this selects the
|
|
* same 32-bit inode as always, and for lfs64 this selects the larger
|
|
* 64-bit inode structure we got from ffsv2.
|
|
*
|
|
* In lfs64:
|
|
* - inode numbers are still 32 bit
|
|
* - segments may not be larger than 4G (counted in bytes)
|
|
* - there may not be more than 2^32 (or perhaps 2^31) segments
|
|
* - the total volume size is limited to 2^63 frags and/or 2^63
|
|
* disk blocks, and probably in practice 2^63 bytes.
|
|
*/
|
|
|
|
#define LFS_MAGIC 0x070162
|
|
#define LFS_MAGIC_SWAPPED 0x62010700
|
|
|
|
#define LFS64_MAGIC (0x19620701 ^ 0xffffffff)
|
|
#define LFS64_MAGIC_SWAPPED (0x01076219 ^ 0xffffffff)
|
|
|
|
#define LFS_VERSION 2
|
|
|
|
#define LFS_MIN_SBINTERVAL 5 /* min superblock segment spacing */
|
|
#define LFS_MAXNUMSB 10 /* max number of superblocks */
|
|
|
|
/* flags for dlfs_pflags */
|
|
#define LFS_PF_CLEAN 0x1
|
|
|
|
/* Inode format versions */
|
|
#define LFS_44INODEFMT 0
|
|
#define LFS_MAXINODEFMT 0
|
|
|
|
struct dlfs {
|
|
u_int32_t dlfs_magic; /* 0: magic number */
|
|
u_int32_t dlfs_version; /* 4: version number */
|
|
|
|
u_int32_t dlfs_size; /* 8: number of blocks in fs (v1) */
|
|
/* number of frags in fs (v2) */
|
|
u_int32_t dlfs_ssize; /* 12: number of blocks per segment (v1) */
|
|
/* number of bytes per segment (v2) */
|
|
u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */
|
|
u_int32_t dlfs_bsize; /* 20: file system block size */
|
|
u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */
|
|
u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */
|
|
|
|
/* Checkpoint region. */
|
|
u_int32_t dlfs_freehd; /* 32: start of the free inode list */
|
|
int32_t dlfs_bfree; /* 36: number of free frags */
|
|
u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */
|
|
int32_t dlfs_avail; /* 44: blocks available for writing */
|
|
int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */
|
|
int32_t dlfs_idaddr; /* 52: inode file disk address */
|
|
u_int32_t dlfs_ifile; /* 56: inode file inode number */
|
|
int32_t dlfs_lastseg; /* 60: address of last segment written */
|
|
int32_t dlfs_nextseg; /* 64: address of next segment to write */
|
|
int32_t dlfs_curseg; /* 68: current segment being written */
|
|
int32_t dlfs_offset; /* 72: offset in curseg for next partial */
|
|
int32_t dlfs_lastpseg; /* 76: address of last partial written */
|
|
u_int32_t dlfs_inopf; /* 80: v1: time stamp; v2: inodes per frag */
|
|
|
|
/* These are configuration parameters. */
|
|
u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */
|
|
|
|
/* These fields can be computed from the others. */
|
|
u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */
|
|
u_int32_t dlfs_fsbpseg; /* 96: frags (fsb) per segment */
|
|
u_int32_t dlfs_inopb; /* 100: inodes per block */
|
|
u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */
|
|
u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */
|
|
u_int32_t dlfs_nindir; /* 112: indirect pointers per block */
|
|
u_int32_t dlfs_nseg; /* 116: number of segments */
|
|
u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */
|
|
u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */
|
|
u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */
|
|
u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */
|
|
u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */
|
|
u_int32_t dlfs_bshift; /* 140: calc block number from file offset */
|
|
u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */
|
|
u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */
|
|
u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */
|
|
u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */
|
|
u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */
|
|
u_int32_t dlfs_blktodb; /* 176: blktodb and dbtoblk shift constant */
|
|
u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */
|
|
|
|
int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */
|
|
/* 188: superblock disk offsets */
|
|
int32_t dlfs_sboffs[LFS_MAXNUMSB];
|
|
|
|
u_int32_t dlfs_nclean; /* 228: Number of clean segments */
|
|
u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */
|
|
u_int16_t dlfs_pflags; /* 322: file system persistent flags */
|
|
int32_t dlfs_dmeta; /* 324: total number of dirty summaries */
|
|
u_int32_t dlfs_minfreeseg; /* 328: segments not counted in bfree */
|
|
u_int32_t dlfs_sumsize; /* 332: size of summary blocks */
|
|
u_int64_t dlfs_serial; /* 336: serial number */
|
|
u_int32_t dlfs_ibsize; /* 344: size of inode blocks */
|
|
int32_t dlfs_s0addr; /* 348: start of segment 0 */
|
|
u_int64_t dlfs_tstamp; /* 352: time stamp */
|
|
u_int32_t dlfs_inodefmt; /* 360: inode format version */
|
|
u_int32_t dlfs_interleave; /* 364: segment interleave */
|
|
u_int32_t dlfs_ident; /* 368: per-fs identifier */
|
|
u_int32_t dlfs_fsbtodb; /* 372: fsbtodb and dbtodsb shift constant */
|
|
u_int32_t dlfs_resvseg; /* 376: segments reserved for the cleaner */
|
|
int8_t dlfs_pad[128]; /* 380: round to 512 bytes */
|
|
/* Checksum -- last valid disk field. */
|
|
u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */
|
|
};
|
|
|
|
struct dlfs64 {
|
|
u_int32_t dlfs_magic; /* 0: magic number */
|
|
u_int32_t dlfs_version; /* 4: version number (2) */
|
|
|
|
u_int64_t dlfs_size; /* 8: number of frags in fs (v2) */
|
|
u_int64_t dlfs_dsize; /* 16: number of disk blocks in fs */
|
|
u_int32_t dlfs_ssize; /* 24: number of bytes per segment (v2) */
|
|
u_int32_t dlfs_bsize; /* 28: file system block size */
|
|
u_int32_t dlfs_fsize; /* 32: size of frag blocks in fs */
|
|
u_int32_t dlfs_frag; /* 36: number of frags in a block in fs */
|
|
|
|
/* Checkpoint region. */
|
|
u_int64_t dlfs_freehd; /* 40: start of the free inode list */
|
|
u_int64_t dlfs_nfiles; /* 48: number of allocated inodes */
|
|
int64_t dlfs_bfree; /* 56: number of free frags */
|
|
int64_t dlfs_avail; /* 64: blocks available for writing */
|
|
int64_t dlfs_idaddr; /* 72: inode file disk address */
|
|
int32_t dlfs_uinodes; /* 80: inodes in cache not yet on disk */
|
|
u_int32_t dlfs_unused_0; /* 84: not used */
|
|
int64_t dlfs_lastseg; /* 88: address of last segment written */
|
|
int64_t dlfs_nextseg; /* 96: address of next segment to write */
|
|
int64_t dlfs_curseg; /* 104: current segment being written */
|
|
int64_t dlfs_offset; /* 112: offset in curseg for next partial */
|
|
int64_t dlfs_lastpseg; /* 120: address of last partial written */
|
|
u_int32_t dlfs_inopf; /* 128: inodes per frag */
|
|
|
|
/* These are configuration parameters. */
|
|
u_int32_t dlfs_minfree; /* 132: minimum percentage of free blocks */
|
|
|
|
/* These fields can be computed from the others. */
|
|
u_int64_t dlfs_maxfilesize; /* 136: maximum representable file size */
|
|
u_int32_t dlfs_fsbpseg; /* 144: frags (fsb) per segment */
|
|
u_int32_t dlfs_inopb; /* 148: inodes per block */
|
|
u_int32_t dlfs_ifpb; /* 152: IFILE entries per block */
|
|
u_int32_t dlfs_sepb; /* 156: SEGUSE entries per block */
|
|
u_int32_t dlfs_nindir; /* 160: indirect pointers per block */
|
|
u_int32_t dlfs_nseg; /* 164: number of segments */
|
|
u_int32_t dlfs_nspf; /* 168: number of sectors per fragment */
|
|
u_int32_t dlfs_cleansz; /* 172: cleaner info size in blocks */
|
|
u_int32_t dlfs_segtabsz; /* 176: segment table size in blocks */
|
|
u_int32_t dlfs_bshift; /* 180: calc block number from file offset */
|
|
u_int32_t dlfs_ffshift; /* 184: fast mult/div for frag from file */
|
|
u_int32_t dlfs_fbshift; /* 188: fast mult/div for frag from block */
|
|
u_int64_t dlfs_bmask; /* 192: calc block offset from file offset */
|
|
u_int64_t dlfs_ffmask; /* 200: calc frag offset from file offset */
|
|
u_int64_t dlfs_fbmask; /* 208: calc frag offset from block offset */
|
|
u_int32_t dlfs_blktodb; /* 216: blktodb and dbtoblk shift constant */
|
|
u_int32_t dlfs_sushift; /* 220: fast mult/div for segusage table */
|
|
|
|
/* 224: superblock disk offsets */
|
|
int64_t dlfs_sboffs[LFS_MAXNUMSB];
|
|
|
|
int32_t dlfs_maxsymlinklen; /* 304: max len of an internal symlink */
|
|
u_int32_t dlfs_nclean; /* 308: Number of clean segments */
|
|
u_char dlfs_fsmnt[MNAMELEN]; /* 312: name mounted on */
|
|
u_int16_t dlfs_pflags; /* 402: file system persistent flags */
|
|
int32_t dlfs_dmeta; /* 404: total number of dirty summaries */
|
|
u_int32_t dlfs_minfreeseg; /* 408: segments not counted in bfree */
|
|
u_int32_t dlfs_sumsize; /* 412: size of summary blocks */
|
|
u_int32_t dlfs_ibsize; /* 416: size of inode blocks */
|
|
u_int32_t dlfs_inodefmt; /* 420: inode format version */
|
|
u_int64_t dlfs_serial; /* 424: serial number */
|
|
int64_t dlfs_s0addr; /* 432: start of segment 0 */
|
|
u_int64_t dlfs_tstamp; /* 440: time stamp */
|
|
u_int32_t dlfs_interleave; /* 448: segment interleave */
|
|
u_int32_t dlfs_ident; /* 452: per-fs identifier */
|
|
u_int32_t dlfs_fsbtodb; /* 456: fsbtodb and dbtodsb shift constant */
|
|
u_int32_t dlfs_resvseg; /* 460: segments reserved for the cleaner */
|
|
int8_t dlfs_pad[44]; /* 464: round to 512 bytes */
|
|
/* Checksum -- last valid disk field. */
|
|
u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */
|
|
};
|
|
|
|
/* Type used for the inode bitmap */
|
|
typedef u_int32_t lfs_bm_t;
|
|
|
|
/*
|
|
* Linked list of segments whose byte count needs updating following a
|
|
* file truncation.
|
|
*/
|
|
struct segdelta {
|
|
long segnum;
|
|
size_t num;
|
|
LIST_ENTRY(segdelta) list;
|
|
};
|
|
|
|
/*
|
|
* In-memory super block.
|
|
*/
|
|
struct lfs {
|
|
union { /* on-disk parameters */
|
|
struct dlfs u_32;
|
|
struct dlfs64 u_64;
|
|
} lfs_dlfs_u;
|
|
|
|
/* These fields are set at mount time and are meaningless on disk. */
|
|
unsigned lfs_is64 : 1, /* are we lfs64 or lfs32? */
|
|
lfs_dobyteswap : 1, /* are we opposite-endian? */
|
|
lfs_hasolddirfmt : 1; /* dir entries have no d_type */
|
|
|
|
struct segment *lfs_sp; /* current segment being written */
|
|
struct vnode *lfs_ivnode; /* vnode for the ifile */
|
|
u_int32_t lfs_seglock; /* single-thread the segment writer */
|
|
pid_t lfs_lockpid; /* pid of lock holder */
|
|
lwpid_t lfs_locklwp; /* lwp of lock holder */
|
|
u_int32_t lfs_iocount; /* number of ios pending */
|
|
u_int32_t lfs_writer; /* don't allow any dirops to start */
|
|
u_int32_t lfs_dirops; /* count of active directory ops */
|
|
u_int32_t lfs_dirvcount; /* count of VDIROP nodes in this fs */
|
|
u_int32_t lfs_doifile; /* Write ifile blocks on next write */
|
|
u_int32_t lfs_nactive; /* Number of segments since last ckp */
|
|
int8_t lfs_fmod; /* super block modified flag */
|
|
int8_t lfs_ronly; /* mounted read-only flag */
|
|
#define LFS_NOTYET 0x01
|
|
#define LFS_IFDIRTY 0x02
|
|
#define LFS_WARNED 0x04
|
|
#define LFS_UNDIROP 0x08
|
|
int8_t lfs_flags; /* currently unused flag */
|
|
u_int16_t lfs_activesb; /* toggle between superblocks */
|
|
daddr_t lfs_sbactive; /* disk address of current sb write */
|
|
struct vnode *lfs_flushvp; /* vnode being flushed */
|
|
int lfs_flushvp_fakevref; /* fake vref count for flushvp */
|
|
struct vnode *lfs_unlockvp; /* being inactivated in lfs_segunlock */
|
|
u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */
|
|
size_t lfs_devbsize; /* Device block size */
|
|
size_t lfs_devbshift; /* Device block shift */
|
|
krwlock_t lfs_fraglock;
|
|
krwlock_t lfs_iflock; /* Ifile lock */
|
|
kcondvar_t lfs_stopcv; /* Wrap lock */
|
|
struct lwp *lfs_stoplwp;
|
|
pid_t lfs_rfpid; /* Process ID of roll-forward agent */
|
|
int lfs_nadirop; /* number of active dirop nodes */
|
|
long lfs_ravail; /* blocks pre-reserved for writing */
|
|
long lfs_favail; /* blocks pre-reserved for writing */
|
|
struct lfs_res_blk *lfs_resblk; /* Reserved memory for pageout */
|
|
TAILQ_HEAD(, inode) lfs_dchainhd; /* dirop vnodes */
|
|
TAILQ_HEAD(, inode) lfs_pchainhd; /* paging vnodes */
|
|
#define LFS_RESHASH_WIDTH 17
|
|
LIST_HEAD(, lfs_res_blk) lfs_reshash[LFS_RESHASH_WIDTH];
|
|
int lfs_pdflush; /* pagedaemon wants us to flush */
|
|
u_int32_t **lfs_suflags; /* Segment use flags */
|
|
#ifdef _KERNEL
|
|
struct pool lfs_clpool; /* Pool for struct lfs_cluster */
|
|
struct pool lfs_bpppool; /* Pool for bpp */
|
|
struct pool lfs_segpool; /* Pool for struct segment */
|
|
#endif /* _KERNEL */
|
|
#define LFS_MAX_CLEANIND 64
|
|
daddr_t lfs_cleanint[LFS_MAX_CLEANIND]; /* Active cleaning intervals */
|
|
int lfs_cleanind; /* Index into intervals */
|
|
int lfs_sleepers; /* # procs sleeping this fs */
|
|
int lfs_pages; /* dirty pages blaming this fs */
|
|
lfs_bm_t *lfs_ino_bitmap; /* Inuse inodes bitmap */
|
|
int lfs_nowrap; /* Suspend log wrap */
|
|
int lfs_wrappass; /* Allow first log wrap requester to pass */
|
|
int lfs_wrapstatus; /* Wrap status */
|
|
int lfs_reclino; /* Inode being reclaimed */
|
|
daddr_t lfs_startseg; /* Segment we started writing at */
|
|
LIST_HEAD(, segdelta) lfs_segdhd; /* List of pending trunc accounting events */
|
|
|
|
#ifdef _KERNEL
|
|
/* The block device we're mounted on. */
|
|
dev_t lfs_dev;
|
|
struct vnode *lfs_devvp;
|
|
|
|
/* ULFS-level information */
|
|
u_int32_t um_flags; /* ULFS flags (below) */
|
|
u_long um_nindir; /* indirect ptrs per block */
|
|
u_long um_lognindir; /* log2 of um_nindir */
|
|
u_long um_bptrtodb; /* indir ptr to disk block */
|
|
u_long um_seqinc; /* inc between seq blocks */
|
|
int um_maxsymlinklen;
|
|
int um_dirblksiz;
|
|
u_int64_t um_maxfilesize;
|
|
|
|
/* Stuff used by quota2 code, not currently operable */
|
|
unsigned lfs_use_quota2 : 1;
|
|
uint32_t lfs_quota_magic;
|
|
uint8_t lfs_quota_flags;
|
|
uint64_t lfs_quotaino[2];
|
|
|
|
/* Sleep address replacing &lfs_avail inside the on-disk superblock */
|
|
/* XXX: should be replaced with a condvar */
|
|
int lfs_availsleep;
|
|
/* This one replaces &lfs_nextseg... all ditto */
|
|
int lfs_nextsegsleep;
|
|
|
|
/* Cleaner lwp, set on first bmapv syscall. */
|
|
struct lwp *lfs_cleaner_thread;
|
|
|
|
/* Hint from cleaner, only valid if curlwp == um_cleaner_thread. */
|
|
/* XXX change this to BLOCK_INFO after resorting this file */
|
|
struct block_info *lfs_cleaner_hint;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Structures used by lfs_bmapv and lfs_markv to communicate information
|
|
* about inodes and data blocks.
|
|
*/
|
|
typedef struct block_info {
|
|
u_int64_t bi_inode; /* inode # */
|
|
int64_t bi_lbn; /* logical block w/in file */
|
|
int64_t bi_daddr; /* disk address of block */
|
|
u_int64_t bi_segcreate; /* origin segment create time */
|
|
int bi_version; /* file version number */
|
|
int bi_size; /* size of the block (if fragment) */
|
|
void *bi_bp; /* data buffer */
|
|
} BLOCK_INFO;
|
|
|
|
/* Compatibility for 7.0 binaries */
|
|
typedef struct block_info_70 {
|
|
u_int32_t bi_inode; /* inode # */
|
|
int32_t bi_lbn; /* logical block w/in file */
|
|
int32_t bi_daddr; /* disk address of block */
|
|
u_int64_t bi_segcreate; /* origin segment create time */
|
|
int bi_version; /* file version number */
|
|
void *bi_bp; /* data buffer */
|
|
int bi_size; /* size of the block (if fragment) */
|
|
} BLOCK_INFO_70;
|
|
|
|
/* Compatibility for 1.5 binaries */
|
|
typedef struct block_info_15 {
|
|
u_int32_t bi_inode; /* inode # */
|
|
int32_t bi_lbn; /* logical block w/in file */
|
|
int32_t bi_daddr; /* disk address of block */
|
|
u_int32_t bi_segcreate; /* origin segment create time */
|
|
int bi_version; /* file version number */
|
|
void *bi_bp; /* data buffer */
|
|
int bi_size; /* size of the block (if fragment) */
|
|
} BLOCK_INFO_15;
|
|
|
|
/*
|
|
* 32/64-bit-clean pointer to block pointers. This points into
|
|
* already-existing storage; it is mostly used to access the block
|
|
* pointers following a FINFO.
|
|
*/
|
|
union lfs_blocks {
|
|
int64_t *b64;
|
|
int32_t *b32;
|
|
};
|
|
|
|
/* In-memory description of a segment about to be written. */
|
|
struct segment {
|
|
struct lfs *fs; /* file system pointer */
|
|
struct buf **bpp; /* pointer to buffer array */
|
|
struct buf **cbpp; /* pointer to next available bp */
|
|
struct buf **start_bpp; /* pointer to first bp in this set */
|
|
struct buf *ibp; /* buffer pointer to inode page */
|
|
union lfs_dinode *idp; /* pointer to ifile dinode */
|
|
FINFO *fip; /* current fileinfo pointer */
|
|
struct vnode *vp; /* vnode being gathered */
|
|
void *segsum; /* segment summary info */
|
|
u_int32_t ninodes; /* number of inodes in this segment */
|
|
int32_t seg_bytes_left; /* bytes left in segment */
|
|
int32_t sum_bytes_left; /* bytes left in summary block */
|
|
u_int32_t seg_number; /* number of this segment */
|
|
union lfs_blocks start_lbp; /* beginning lbn for this set */
|
|
|
|
#define SEGM_CKP 0x0001 /* doing a checkpoint */
|
|
#define SEGM_CLEAN 0x0002 /* cleaner call; don't sort */
|
|
#define SEGM_SYNC 0x0004 /* wait for segment */
|
|
#define SEGM_PROT 0x0008 /* don't inactivate at segunlock */
|
|
#define SEGM_PAGEDAEMON 0x0010 /* pagedaemon called us */
|
|
#define SEGM_WRITERD 0x0020 /* LFS writed called us */
|
|
#define SEGM_FORCE_CKP 0x0040 /* Force checkpoint right away */
|
|
#define SEGM_RECLAIM 0x0080 /* Writing to reclaim vnode */
|
|
#define SEGM_SINGLE 0x0100 /* Opportunistic writevnodes */
|
|
u_int16_t seg_flags; /* run-time flags for this segment */
|
|
u_int32_t seg_iocount; /* number of ios pending */
|
|
int ndupino; /* number of duplicate inodes */
|
|
};
|
|
|
|
/* Statistics Counters */
|
|
struct lfs_stats { /* Must match sysctl list in lfs_vfsops.h ! */
|
|
u_int segsused;
|
|
u_int psegwrites;
|
|
u_int psyncwrites;
|
|
u_int pcleanwrites;
|
|
u_int blocktot;
|
|
u_int cleanblocks;
|
|
u_int ncheckpoints;
|
|
u_int nwrites;
|
|
u_int nsync_writes;
|
|
u_int wait_exceeded;
|
|
u_int write_exceeded;
|
|
u_int flush_invoked;
|
|
u_int vflush_invoked;
|
|
u_int clean_inlocked;
|
|
u_int clean_vnlocked;
|
|
u_int segs_reclaimed;
|
|
};
|
|
|
|
/* Fcntls to take the place of the lfs syscalls */
|
|
struct lfs_fcntl_markv {
|
|
BLOCK_INFO *blkiov; /* blocks to relocate */
|
|
int blkcnt; /* number of blocks (limited to 65536) */
|
|
};
|
|
|
|
#define LFCNSEGWAITALL _FCNR_FSPRIV('L', 14, struct timeval)
|
|
#define LFCNSEGWAIT _FCNR_FSPRIV('L', 15, struct timeval)
|
|
#define LFCNBMAPV _FCNRW_FSPRIV('L', 16, struct lfs_fcntl_markv)
|
|
#define LFCNMARKV _FCNRW_FSPRIV('L', 17, struct lfs_fcntl_markv)
|
|
#define LFCNRECLAIM _FCNO_FSPRIV('L', 4)
|
|
|
|
struct lfs_fhandle {
|
|
char space[28]; /* FHANDLE_SIZE_COMPAT (but used from userland too) */
|
|
};
|
|
#define LFCNREWIND _FCNR_FSPRIV('L', 6, int)
|
|
#define LFCNINVAL _FCNR_FSPRIV('L', 7, int)
|
|
#define LFCNRESIZE _FCNR_FSPRIV('L', 8, int)
|
|
#define LFCNWRAPSTOP _FCNR_FSPRIV('L', 9, int)
|
|
#define LFCNWRAPGO _FCNR_FSPRIV('L', 10, int)
|
|
#define LFCNIFILEFH _FCNW_FSPRIV('L', 11, struct lfs_fhandle)
|
|
#define LFCNWRAPPASS _FCNR_FSPRIV('L', 12, int)
|
|
# define LFS_WRAP_GOING 0x0
|
|
# define LFS_WRAP_WAITING 0x1
|
|
#define LFCNWRAPSTATUS _FCNW_FSPRIV('L', 13, int)
|
|
|
|
/* Debug segment lock */
|
|
#ifdef notyet
|
|
# define ASSERT_SEGLOCK(fs) KASSERT(LFS_SEGLOCK_HELD(fs))
|
|
# define ASSERT_NO_SEGLOCK(fs) KASSERT(!LFS_SEGLOCK_HELD(fs))
|
|
# define ASSERT_DUNNO_SEGLOCK(fs)
|
|
# define ASSERT_MAYBE_SEGLOCK(fs)
|
|
#else /* !notyet */
|
|
# define ASSERT_DUNNO_SEGLOCK(fs) \
|
|
DLOG((DLOG_SEG, "lfs func %s seglock wrong (%d)\n", __func__, \
|
|
LFS_SEGLOCK_HELD(fs)))
|
|
# define ASSERT_SEGLOCK(fs) do { \
|
|
if (!LFS_SEGLOCK_HELD(fs)) { \
|
|
DLOG((DLOG_SEG, "lfs func %s seglock wrong (0)\n", __func__)); \
|
|
} \
|
|
} while(0)
|
|
# define ASSERT_NO_SEGLOCK(fs) do { \
|
|
if (LFS_SEGLOCK_HELD(fs)) { \
|
|
DLOG((DLOG_SEG, "lfs func %s seglock wrong (1)\n", __func__)); \
|
|
} \
|
|
} while(0)
|
|
# define ASSERT_MAYBE_SEGLOCK(x)
|
|
#endif /* !notyet */
|
|
|
|
/*
|
|
* Arguments to mount LFS filesystems
|
|
*/
|
|
struct ulfs_args {
|
|
char *fspec; /* block special device to mount */
|
|
};
|
|
|
|
__BEGIN_DECLS
|
|
void lfs_itimes(struct inode *, const struct timespec *,
|
|
const struct timespec *, const struct timespec *);
|
|
__END_DECLS
|
|
|
|
#endif /* !_UFS_LFS_LFS_H_ */
|