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minix/sys/ufs/lfs/lfs.h
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC) 
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

1270 lines
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/* $NetBSD: lfs.h,v 1.160 2013/07/28 01:22:55 dholland Exp $ */
/* from NetBSD: dinode.h,v 1.22 2013/01/22 09:39:18 dholland Exp */
/* from NetBSD: dir.h,v 1.21 2009/07/22 04:49:19 dholland Exp */
/*-
* Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Konrad E. Schroder <perseant@hhhh.org>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)lfs.h 8.9 (Berkeley) 5/8/95
*/
/*
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Marshall
* Kirk McKusick and Network Associates Laboratories, the Security
* Research Division of Network Associates, Inc. under DARPA/SPAWAR
* contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
* research program
*
* Copyright (c) 1982, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)dinode.h 8.9 (Berkeley) 3/29/95
*/
/*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)dir.h 8.5 (Berkeley) 4/27/95
*/
/*
* NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT.
*/
#ifndef _UFS_LFS_LFS_H_
#define _UFS_LFS_LFS_H_
#include <sys/rwlock.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/condvar.h>
#include <sys/mount.h>
#include <sys/pool.h>
/*
* Compile-time options for LFS.
*/
#define LFS_IFIND_RETRIES 16
#define LFS_LOGLENGTH 1024 /* size of debugging log */
#define LFS_MAX_ACTIVE 10 /* Dirty segments before ckp forced */
/*
* Fixed filesystem layout parameters
*/
#define LFS_LABELPAD 8192 /* LFS label size */
#define LFS_SBPAD 8192 /* LFS superblock size */
#define LFS_UNUSED_INUM 0 /* 0: out of band inode number */
#define LFS_IFILE_INUM 1 /* 1: IFILE inode number */
/* 2: Root inode number */
#define LFS_LOSTFOUNDINO 3 /* 3: lost+found inode number */
#define LFS_FIRST_INUM 4 /* 4: first free inode number */
/*
* The root inode is the root of the file system. Inode 0 can't be used for
* normal purposes and historically bad blocks were linked to inode 1, thus
* the root inode is 2. (Inode 1 is no longer used for this purpose, however
* numerous dump tapes make this assumption, so we are stuck with it).
*/
#define ULFS_ROOTINO ((ino_t)2)
/*
* The Whiteout inode# is a dummy non-zero inode number which will
* never be allocated to a real file. It is used as a place holder
* in the directory entry which has been tagged as a LFS_DT_WHT entry.
* See the comments about ULFS_ROOTINO above.
*/
#define ULFS_WINO ((ino_t)1)
#define LFS_V1_SUMMARY_SIZE 512 /* V1 fixed summary size */
#define LFS_DFL_SUMMARY_SIZE 512 /* Default summary size */
#define LFS_MAX_DADDR 0x7fffffff /* Highest addressable fsb */
#define LFS_MAXNAMLEN 255 /* maximum name length in a dir */
#define ULFS_NXADDR 2
#define ULFS_NDADDR 12 /* Direct addresses in inode. */
#define ULFS_NIADDR 3 /* Indirect addresses in inode. */
/*
* Adjustable filesystem parameters
*/
#ifndef LFS_ATIME_IFILE
# define LFS_ATIME_IFILE 0 /* Store atime info in ifile (optional in LFSv1) */
#endif
#define LFS_MARKV_MAXBLKCNT 65536 /* Max block count for lfs_markv() */
/*
* Directories
*/
/*
* A directory consists of some number of blocks of LFS_DIRBLKSIZ
* bytes, where LFS_DIRBLKSIZ is chosen such that it can be transferred
* to disk in a single atomic operation (e.g. 512 bytes on most machines).
*
* Each LFS_DIRBLKSIZ byte block contains some number of directory entry
* structures, which are of variable length. Each directory entry has
* a struct lfs_direct at the front of it, containing its inode number,
* the length of the entry, and the length of the name contained in
* the entry. These are followed by the name padded to a 4 byte boundary.
* All names are guaranteed null terminated.
* The maximum length of a name in a directory is LFS_MAXNAMLEN.
*
* The macro DIRSIZ(fmt, dp) gives the amount of space required to represent
* a directory entry. Free space in a directory is represented by
* entries which have dp->d_reclen > DIRSIZ(fmt, dp). All LFS_DIRBLKSIZ bytes
* in a directory block are claimed by the directory entries. This
* usually results in the last entry in a directory having a large
* dp->d_reclen. When entries are deleted from a directory, the
* space is returned to the previous entry in the same directory
* block by increasing its dp->d_reclen. If the first entry of
* a directory block is free, then its dp->d_ino is set to 0.
* Entries other than the first in a directory do not normally have
* dp->d_ino set to 0.
*/
/*
* Directory block size.
*/
#undef LFS_DIRBLKSIZ
#define LFS_DIRBLKSIZ DEV_BSIZE
/*
* Convert between stat structure types and directory types.
*/
#define LFS_IFTODT(mode) (((mode) & 0170000) >> 12)
#define LFS_DTTOIF(dirtype) ((dirtype) << 12)
/*
* The LFS_DIRSIZ macro gives the minimum record length which will hold
* the directory entry. This requires the amount of space in struct lfs_direct
* without the d_name field, plus enough space for the name with a terminating
* null byte (dp->d_namlen+1), rounded up to a 4 byte boundary.
*/
#define LFS_DIRECTSIZ(namlen) \
((sizeof(struct lfs_direct) - (LFS_MAXNAMLEN+1)) + (((namlen)+1 + 3) &~ 3))
#if (BYTE_ORDER == LITTLE_ENDIAN)
#define LFS_DIRSIZ(oldfmt, dp, needswap) \
(((oldfmt) && !(needswap)) ? \
LFS_DIRECTSIZ((dp)->d_type) : LFS_DIRECTSIZ((dp)->d_namlen))
#else
#define LFS_DIRSIZ(oldfmt, dp, needswap) \
(((oldfmt) && (needswap)) ? \
LFS_DIRECTSIZ((dp)->d_type) : LFS_DIRECTSIZ((dp)->d_namlen))
#endif
/* Constants for the first argument of LFS_DIRSIZ */
#define LFS_OLDDIRFMT 1
#define LFS_NEWDIRFMT 0
/*
* Theoretically, directories can be more than 2Gb in length; however, in
* practice this seems unlikely. So, we define the type doff_t as a 32-bit
* quantity to keep down the cost of doing lookup on a 32-bit machine.
*/
#define doff_t int32_t
#define lfs_doff_t int32_t
#define LFS_MAXDIRSIZE (0x7fffffff)
/*
* File types for d_type
*/
#define LFS_DT_UNKNOWN 0
#define LFS_DT_FIFO 1
#define LFS_DT_CHR 2
#define LFS_DT_DIR 4
#define LFS_DT_BLK 6
#define LFS_DT_REG 8
#define LFS_DT_LNK 10
#define LFS_DT_SOCK 12
#define LFS_DT_WHT 14
/*
* (See notes above)
*/
#define d_ino d_fileno
struct lfs_direct {
u_int32_t d_fileno; /* inode number of entry */
u_int16_t d_reclen; /* length of this record */
u_int8_t d_type; /* file type, see below */
u_int8_t d_namlen; /* length of string in d_name */
char d_name[LFS_MAXNAMLEN + 1];/* name with length <= LFS_MAXNAMLEN */
};
/*
* Template for manipulating directories. Should use struct lfs_direct's,
* but the name field is LFS_MAXNAMLEN - 1, and this just won't do.
*/
struct lfs_dirtemplate {
u_int32_t dot_ino;
int16_t dot_reclen;
u_int8_t dot_type;
u_int8_t dot_namlen;
char dot_name[4]; /* must be multiple of 4 */
u_int32_t dotdot_ino;
int16_t dotdot_reclen;
u_int8_t dotdot_type;
u_int8_t dotdot_namlen;
char dotdot_name[4]; /* ditto */
};
/*
* This is the old format of directories, sans type element.
*/
struct lfs_odirtemplate {
u_int32_t dot_ino;
int16_t dot_reclen;
u_int16_t dot_namlen;
char dot_name[4]; /* must be multiple of 4 */
u_int32_t dotdot_ino;
int16_t dotdot_reclen;
u_int16_t dotdot_namlen;
char dotdot_name[4]; /* ditto */
};
/*
* Inodes
*/
/*
* A dinode contains all the meta-data associated with a LFS file.
* This structure defines the on-disk format of a dinode. Since
* this structure describes an on-disk structure, all its fields
* are defined by types with precise widths.
*/
struct ulfs1_dinode {
u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
int16_t di_nlink; /* 2: File link count. */
u_int32_t di_inumber; /* 4: Inode number. */
u_int64_t di_size; /* 8: File byte count. */
int32_t di_atime; /* 16: Last access time. */
int32_t di_atimensec; /* 20: Last access time. */
int32_t di_mtime; /* 24: Last modified time. */
int32_t di_mtimensec; /* 28: Last modified time. */
int32_t di_ctime; /* 32: Last inode change time. */
int32_t di_ctimensec; /* 36: Last inode change time. */
int32_t di_db[ULFS_NDADDR]; /* 40: Direct disk blocks. */
int32_t di_ib[ULFS_NIADDR]; /* 88: Indirect disk blocks. */
u_int32_t di_flags; /* 100: Status flags (chflags). */
u_int32_t di_blocks; /* 104: Blocks actually held. */
int32_t di_gen; /* 108: Generation number. */
u_int32_t di_uid; /* 112: File owner. */
u_int32_t di_gid; /* 116: File group. */
u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */
};
struct ulfs2_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 */
int64_t di_spare[2]; /* 240: Reserved; currently unused */
};
/*
* 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. */
/*
* Maximum length of a symlink that can be stored within the inode.
*/
#define ULFS1_MAXSYMLINKLEN ((ULFS_NDADDR + ULFS_NIADDR) * sizeof(int32_t))
#define ULFS2_MAXSYMLINKLEN ((ULFS_NDADDR + ULFS_NIADDR) * sizeof(int64_t))
#define ULFS_MAXSYMLINKLEN(ip) \
((ip)->i_ump->um_fstype == ULFS1) ? \
ULFS1_MAXSYMLINKLEN : ULFS2_MAXSYMLINKLEN
/*
* "struct buf" associated definitions
*/
/* Unassigned disk addresses. */
#define UNASSIGNED -1
#define UNWRITTEN -2
/* Unused logical block number */
#define LFS_UNUSED_LBN -1
# define LFS_LOCK_BUF(bp) do { \
if (((bp)->b_flags & B_LOCKED) == 0 && bp->b_iodone == NULL) { \
mutex_enter(&lfs_lock); \
++locked_queue_count; \
locked_queue_bytes += bp->b_bufsize; \
mutex_exit(&lfs_lock); \
} \
(bp)->b_flags |= B_LOCKED; \
} while (0)
# define LFS_UNLOCK_BUF(bp) do { \
if (((bp)->b_flags & B_LOCKED) != 0 && bp->b_iodone == NULL) { \
mutex_enter(&lfs_lock); \
--locked_queue_count; \
locked_queue_bytes -= bp->b_bufsize; \
if (locked_queue_count < LFS_WAIT_BUFS && \
locked_queue_bytes < LFS_WAIT_BYTES) \
cv_broadcast(&locked_queue_cv); \
mutex_exit(&lfs_lock); \
} \
(bp)->b_flags &= ~B_LOCKED; \
} while (0)
/*
* "struct inode" associated definitions
*/
/* For convenience */
#define IN_ALLMOD (IN_MODIFIED|IN_ACCESS|IN_CHANGE|IN_UPDATE|IN_MODIFY|IN_ACCESSED|IN_CLEANING)
#define LFS_SET_UINO(ip, flags) do { \
if (((flags) & IN_ACCESSED) && !((ip)->i_flag & IN_ACCESSED)) \
++(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_CLEANING) && !((ip)->i_flag & IN_CLEANING)) \
++(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_MODIFIED) && !((ip)->i_flag & IN_MODIFIED)) \
++(ip)->i_lfs->lfs_uinodes; \
(ip)->i_flag |= (flags); \
} while (0)
#define LFS_CLR_UINO(ip, flags) do { \
if (((flags) & IN_ACCESSED) && ((ip)->i_flag & IN_ACCESSED)) \
--(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_CLEANING) && ((ip)->i_flag & IN_CLEANING)) \
--(ip)->i_lfs->lfs_uinodes; \
if (((flags) & IN_MODIFIED) && ((ip)->i_flag & IN_MODIFIED)) \
--(ip)->i_lfs->lfs_uinodes; \
(ip)->i_flag &= ~(flags); \
if ((ip)->i_lfs->lfs_uinodes < 0) { \
panic("lfs_uinodes < 0"); \
} \
} while (0)
#define LFS_ITIMES(ip, acc, mod, cre) \
while ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE | IN_MODIFY)) \
lfs_itimes(ip, acc, mod, cre)
/*
* 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 */
};
#define SEGUPB(fs) (fs->lfs_sepb)
#define SEGTABSIZE_SU(fs) \
(((fs)->lfs_nseg + SEGUPB(fs) - 1) / (fs)->lfs_sepb)
#ifdef _KERNEL
# define SHARE_IFLOCK(F) \
do { \
rw_enter(&(F)->lfs_iflock, RW_READER); \
} while(0)
# define UNSHARE_IFLOCK(F) \
do { \
rw_exit(&(F)->lfs_iflock); \
} while(0)
#else /* ! _KERNEL */
# define SHARE_IFLOCK(F)
# define UNSHARE_IFLOCK(F)
#endif /* ! _KERNEL */
/* Read in the block with a specific segment usage entry from the ifile. */
#define LFS_SEGENTRY(SP, F, IN, BP) do { \
int _e; \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if ((_e = bread((F)->lfs_ivnode, \
((IN) / (F)->lfs_sepb) + (F)->lfs_cleansz, \
(F)->lfs_bsize, NOCRED, 0, &(BP))) != 0) \
panic("lfs: ifile read: %d", _e); \
if ((F)->lfs_version == 1) \
(SP) = (SEGUSE *)((SEGUSE_V1 *)(BP)->b_data + \
((IN) & ((F)->lfs_sepb - 1))); \
else \
(SP) = (SEGUSE *)(BP)->b_data + ((IN) % (F)->lfs_sepb); \
UNSHARE_IFLOCK(F); \
} while (0)
#define LFS_WRITESEGENTRY(SP, F, IN, BP) do { \
if ((SP)->su_nbytes == 0) \
(SP)->su_flags |= SEGUSE_EMPTY; \
else \
(SP)->su_flags &= ~SEGUSE_EMPTY; \
(F)->lfs_suflags[(F)->lfs_activesb][(IN)] = (SP)->su_flags; \
LFS_BWRITE_LOG(BP); \
} while (0)
/*
* On-disk file information. One per file with data blocks in the segment.
*/
typedef struct finfo FINFO;
struct finfo {
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 */
int32_t fi_blocks[1]; /* array of logical block numbers */
};
/* sizeof FINFO except fi_blocks */
#define FINFOSIZE (sizeof(FINFO) - sizeof(int32_t))
/*
* Index file inode entries.
*/
typedef struct ifile IFILE;
struct ifile {
u_int32_t if_version; /* inode version number */
#define LFS_UNUSED_DADDR 0 /* out-of-band daddr */
int32_t if_daddr; /* inode disk address */
#define LFS_ORPHAN_NEXTFREE (~(u_int32_t)0) /* indicate orphaned file */
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
struct timespec if_atime; /* Last access time */
#endif
};
/*
* LFSv1 compatibility code is not allowed to touch if_atime, since it
* may not be mapped!
*/
/* Read in the block with a specific inode from the ifile. */
#define LFS_IENTRY(IP, F, IN, BP) do { \
int _e; \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if ((_e = bread((F)->lfs_ivnode, \
(IN) / (F)->lfs_ifpb + (F)->lfs_cleansz + (F)->lfs_segtabsz, \
(F)->lfs_bsize, NOCRED, 0, &(BP))) != 0) \
panic("lfs: ifile ino %d read %d", (int)(IN), _e); \
if ((F)->lfs_version == 1) \
(IP) = (IFILE *)((IFILE_V1 *)(BP)->b_data + \
(IN) % (F)->lfs_ifpb); \
else \
(IP) = (IFILE *)(BP)->b_data + (IN) % (F)->lfs_ifpb; \
UNSHARE_IFLOCK(F); \
} while (0)
/*
* Cleaner information structure. This resides in the ifile and is used
* to pass information from the kernel to the cleaner.
*/
typedef struct _cleanerinfo {
u_int32_t clean; /* number of clean segments */
u_int32_t dirty; /* number of dirty segments */
int32_t bfree; /* disk blocks free */
int32_t avail; /* disk blocks available */
u_int32_t free_head; /* head of the inode free list */
u_int32_t free_tail; /* tail of the inode free list */
#define LFS_CLEANER_MUST_CLEAN 0x01
u_int32_t flags; /* status word from the kernel */
} CLEANERINFO;
#define CLEANSIZE_SU(fs) \
((sizeof(CLEANERINFO) + (fs)->lfs_bsize - 1) >> (fs)->lfs_bshift)
/* Read in the block with the cleaner info from the ifile. */
#define LFS_CLEANERINFO(CP, F, BP) do { \
SHARE_IFLOCK(F); \
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
if (bread((F)->lfs_ivnode, \
(daddr_t)0, (F)->lfs_bsize, NOCRED, 0, &(BP))) \
panic("lfs: ifile read"); \
(CP) = (CLEANERINFO *)(BP)->b_data; \
UNSHARE_IFLOCK(F); \
} while (0)
/*
* Synchronize the Ifile cleaner info with current avail and bfree.
*/
#define LFS_SYNC_CLEANERINFO(cip, fs, bp, w) do { \
mutex_enter(&lfs_lock); \
if ((w) || (cip)->bfree != (fs)->lfs_bfree || \
(cip)->avail != (fs)->lfs_avail - (fs)->lfs_ravail - \
(fs)->lfs_favail) { \
(cip)->bfree = (fs)->lfs_bfree; \
(cip)->avail = (fs)->lfs_avail - (fs)->lfs_ravail - \
(fs)->lfs_favail; \
if (((bp)->b_flags & B_GATHERED) == 0) { \
(fs)->lfs_flags |= LFS_IFDIRTY; \
} \
mutex_exit(&lfs_lock); \
(void) LFS_BWRITE_LOG(bp); /* Ifile */ \
} else { \
mutex_exit(&lfs_lock); \
brelse(bp, 0); \
} \
} while (0)
/*
* Get the head of the inode free list.
* Always called with the segment lock held.
*/
#define LFS_GET_HEADFREE(FS, CIP, BP, FREEP) do { \
if ((FS)->lfs_version > 1) { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(FS)->lfs_freehd = (CIP)->free_head; \
brelse(BP, 0); \
} \
*(FREEP) = (FS)->lfs_freehd; \
} while (0)
#define LFS_PUT_HEADFREE(FS, CIP, BP, VAL) do { \
(FS)->lfs_freehd = (VAL); \
if ((FS)->lfs_version > 1) { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(CIP)->free_head = (VAL); \
LFS_BWRITE_LOG(BP); \
mutex_enter(&lfs_lock); \
(FS)->lfs_flags |= LFS_IFDIRTY; \
mutex_exit(&lfs_lock); \
} \
} while (0)
#define LFS_GET_TAILFREE(FS, CIP, BP, FREEP) do { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
*(FREEP) = (CIP)->free_tail; \
brelse(BP, 0); \
} while (0)
#define LFS_PUT_TAILFREE(FS, CIP, BP, VAL) do { \
LFS_CLEANERINFO((CIP), (FS), (BP)); \
(CIP)->free_tail = (VAL); \
LFS_BWRITE_LOG(BP); \
mutex_enter(&lfs_lock); \
(FS)->lfs_flags |= LFS_IFDIRTY; \
mutex_exit(&lfs_lock); \
} while (0)
/*
* On-disk segment summary information
*/
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 */
#define SS_MAGIC 0x061561
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 */
#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 */
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 segsum SEGSUM;
struct segsum {
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_ident; /* 16: roll-forward fsid */
#define ss_ocreate ss_ident /* ident is where create was in v1 */
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... */
};
#define SEGSUM_SIZE(fs) ((fs)->lfs_version == 1 ? sizeof(SEGSUM_V1) : sizeof(SEGSUM))
/*
* On-disk super block.
*/
struct dlfs {
#define LFS_MAGIC 0x070162
u_int32_t dlfs_magic; /* 0: magic number */
#define LFS_VERSION 2
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 list */
int32_t dlfs_bfree; /* 36: number of free disk blocks */
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 */
#define dlfs_otstamp dlfs_inopf
/* 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: 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 */
#define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */
#define LFS_MAXNUMSB 10 /* 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 */
#define LFS_PF_CLEAN 0x1
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_start; /* 348: start of segment 0 */
u_int64_t dlfs_tstamp; /* 352: time stamp */
#define LFS_44INODEFMT 0
#define LFS_MAXINODEFMT 0
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 */
};
/* 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 {
struct dlfs lfs_dlfs; /* on-disk parameters */
#define lfs_magic lfs_dlfs.dlfs_magic
#define lfs_version lfs_dlfs.dlfs_version
#define lfs_size lfs_dlfs.dlfs_size
#define lfs_ssize lfs_dlfs.dlfs_ssize
#define lfs_dsize lfs_dlfs.dlfs_dsize
#define lfs_bsize lfs_dlfs.dlfs_bsize
#define lfs_fsize lfs_dlfs.dlfs_fsize
#define lfs_frag lfs_dlfs.dlfs_frag
#define lfs_freehd lfs_dlfs.dlfs_freehd
#define lfs_bfree lfs_dlfs.dlfs_bfree
#define lfs_nfiles lfs_dlfs.dlfs_nfiles
#define lfs_avail lfs_dlfs.dlfs_avail
#define lfs_uinodes lfs_dlfs.dlfs_uinodes
#define lfs_idaddr lfs_dlfs.dlfs_idaddr
#define lfs_ifile lfs_dlfs.dlfs_ifile
#define lfs_lastseg lfs_dlfs.dlfs_lastseg
#define lfs_nextseg lfs_dlfs.dlfs_nextseg
#define lfs_curseg lfs_dlfs.dlfs_curseg
#define lfs_offset lfs_dlfs.dlfs_offset
#define lfs_lastpseg lfs_dlfs.dlfs_lastpseg
#define lfs_otstamp lfs_dlfs.dlfs_inopf
#define lfs_inopf lfs_dlfs.dlfs_inopf
#define lfs_minfree lfs_dlfs.dlfs_minfree
#define lfs_maxfilesize lfs_dlfs.dlfs_maxfilesize
#define lfs_fsbpseg lfs_dlfs.dlfs_fsbpseg
#define lfs_inopb lfs_dlfs.dlfs_inopb
#define lfs_ifpb lfs_dlfs.dlfs_ifpb
#define lfs_sepb lfs_dlfs.dlfs_sepb
#define lfs_nindir lfs_dlfs.dlfs_nindir
#define lfs_nseg lfs_dlfs.dlfs_nseg
#define lfs_nspf lfs_dlfs.dlfs_nspf
#define lfs_cleansz lfs_dlfs.dlfs_cleansz
#define lfs_segtabsz lfs_dlfs.dlfs_segtabsz
#define lfs_segmask lfs_dlfs.dlfs_segmask
#define lfs_segshift lfs_dlfs.dlfs_segshift
#define lfs_bmask lfs_dlfs.dlfs_bmask
#define lfs_bshift lfs_dlfs.dlfs_bshift
#define lfs_ffmask lfs_dlfs.dlfs_ffmask
#define lfs_ffshift lfs_dlfs.dlfs_ffshift
#define lfs_fbmask lfs_dlfs.dlfs_fbmask
#define lfs_fbshift lfs_dlfs.dlfs_fbshift
#define lfs_blktodb lfs_dlfs.dlfs_blktodb
#define lfs_fsbtodb lfs_dlfs.dlfs_fsbtodb
#define lfs_sushift lfs_dlfs.dlfs_sushift
#define lfs_maxsymlinklen lfs_dlfs.dlfs_maxsymlinklen
#define lfs_sboffs lfs_dlfs.dlfs_sboffs
#define lfs_cksum lfs_dlfs.dlfs_cksum
#define lfs_pflags lfs_dlfs.dlfs_pflags
#define lfs_fsmnt lfs_dlfs.dlfs_fsmnt
#define lfs_nclean lfs_dlfs.dlfs_nclean
#define lfs_dmeta lfs_dlfs.dlfs_dmeta
#define lfs_minfreeseg lfs_dlfs.dlfs_minfreeseg
#define lfs_sumsize lfs_dlfs.dlfs_sumsize
#define lfs_serial lfs_dlfs.dlfs_serial
#define lfs_ibsize lfs_dlfs.dlfs_ibsize
#define lfs_start lfs_dlfs.dlfs_start
#define lfs_tstamp lfs_dlfs.dlfs_tstamp
#define lfs_inodefmt lfs_dlfs.dlfs_inodefmt
#define lfs_interleave lfs_dlfs.dlfs_interleave
#define lfs_ident lfs_dlfs.dlfs_ident
#define lfs_resvseg lfs_dlfs.dlfs_resvseg
/* These fields are set at mount time and are meaningless on disk. */
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
int32_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 */
int lfs_startseg; /* Segment we started writing at */
LIST_HEAD(, segdelta) lfs_segdhd; /* List of pending trunc accounting events */
#ifdef _KERNEL
/* 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];
#endif
};
/* LFS_NINDIR is the number of indirects in a file system block. */
#define LFS_NINDIR(fs) ((fs)->lfs_nindir)
/* LFS_INOPB is the number of inodes in a secondary storage block. */
#define LFS_INOPB(fs) ((fs)->lfs_inopb)
/* LFS_INOPF is the number of inodes in a fragment. */
#define LFS_INOPF(fs) ((fs)->lfs_inopf)
#define lfs_blksize(fs, ip, lbn) \
(((lbn) >= ULFS_NDADDR || (ip)->i_ffs1_size >= ((lbn) + 1) << (fs)->lfs_bshift) \
? (fs)->lfs_bsize \
: (lfs_fragroundup(fs, lfs_blkoff(fs, (ip)->i_ffs1_size))))
#define lfs_blkoff(fs, loc) ((int)((loc) & (fs)->lfs_bmask))
#define lfs_fragoff(fs, loc) /* calculates (loc % fs->lfs_fsize) */ \
((int)((loc) & (fs)->lfs_ffmask))
#if defined(_KERNEL)
#define LFS_FSBTODB(fs, b) ((b) << ((fs)->lfs_ffshift - DEV_BSHIFT))
#define LFS_DBTOFSB(fs, b) ((b) >> ((fs)->lfs_ffshift - DEV_BSHIFT))
#else
#define LFS_FSBTODB(fs, b) ((b) << (fs)->lfs_fsbtodb)
#define LFS_DBTOFSB(fs, b) ((b) >> (fs)->lfs_fsbtodb)
#endif
#define lfs_lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift)
#define lfs_lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift)
#define lfs_fsbtob(fs, b) ((b) << (fs)->lfs_ffshift)
#define lfs_btofsb(fs, b) ((b) >> (fs)->lfs_ffshift)
#define lfs_numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \
((loc) >> (fs)->lfs_ffshift)
#define lfs_blkroundup(fs, size)/* calculates roundup(size, fs->lfs_bsize) */ \
((off_t)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask)))
#define lfs_fragroundup(fs, size)/* calculates roundup(size, fs->lfs_fsize) */ \
((off_t)(((size) + (fs)->lfs_ffmask) & (~(fs)->lfs_ffmask)))
#define lfs_fragstoblks(fs, frags)/* calculates (frags / fs->fs_frag) */ \
((frags) >> (fs)->lfs_fbshift)
#define lfs_blkstofrags(fs, blks)/* calculates (blks * fs->fs_frag) */ \
((blks) << (fs)->lfs_fbshift)
#define lfs_fragnum(fs, fsb) /* calculates (fsb % fs->lfs_frag) */ \
((fsb) & ((fs)->lfs_frag - 1))
#define lfs_blknum(fs, fsb) /* calculates rounddown(fsb, fs->lfs_frag) */ \
((fsb) &~ ((fs)->lfs_frag - 1))
#define lfs_dblksize(fs, dp, lbn) \
(((lbn) >= ULFS_NDADDR || (dp)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\
? (fs)->lfs_bsize \
: (lfs_fragroundup(fs, lfs_blkoff(fs, (dp)->di_size))))
#define lfs_segsize(fs) ((fs)->lfs_version == 1 ? \
lfs_lblktosize((fs), (fs)->lfs_ssize) : \
(fs)->lfs_ssize)
#define lfs_segtod(fs, seg) (((fs)->lfs_version == 1 ? \
(fs)->lfs_ssize << (fs)->lfs_blktodb : \
lfs_btofsb((fs), (fs)->lfs_ssize)) * (seg))
#define lfs_dtosn(fs, daddr) /* block address to segment number */ \
((uint32_t)(((daddr) - (fs)->lfs_start) / lfs_segtod((fs), 1)))
#define lfs_sntod(fs, sn) /* segment number to disk address */ \
((daddr_t)(lfs_segtod((fs), (sn)) + (fs)->lfs_start))
/*
* Structures used by lfs_bmapv and lfs_markv to communicate information
* about inodes and data blocks.
*/
typedef struct block_info {
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;
/* 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;
/* 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 */
struct ulfs1_dinode *idp; /* pointer to ifile dinode */
struct 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 */
int32_t *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 */
};
/*
* Macros for determining free space on the disk, with the variable metadata
* of segment summaries and inode blocks taken into account.
*/
/*
* Estimate number of clean blocks not available for writing because
* they will contain metadata or overhead. This is calculated as
*
* E = ((C * M / D) * D + (0) * (T - D)) / T
* or more simply
* E = (C * M) / T
*
* where
* C is the clean space,
* D is the dirty space,
* M is the dirty metadata, and
* T = C + D is the total space on disk.
*
* This approximates the old formula of E = C * M / D when D is close to T,
* but avoids falsely reporting "disk full" when the sample size (D) is small.
*/
#define LFS_EST_CMETA(F) (int32_t)(( \
((F)->lfs_dmeta * (int64_t)(F)->lfs_nclean) / \
((F)->lfs_nseg)))
/* Estimate total size of the disk not including metadata */
#define LFS_EST_NONMETA(F) ((F)->lfs_dsize - (F)->lfs_dmeta - LFS_EST_CMETA(F))
/* Estimate number of blocks actually available for writing */
#define LFS_EST_BFREE(F) ((F)->lfs_bfree > LFS_EST_CMETA(F) ? \
(F)->lfs_bfree - LFS_EST_CMETA(F) : 0)
/* Amount of non-meta space not available to mortal man */
#define LFS_EST_RSVD(F) (int32_t)((LFS_EST_NONMETA(F) * \
(u_int64_t)(F)->lfs_minfree) / \
100)
/* Can credential C write BB blocks */
#define ISSPACE(F, BB, C) \
((((C) == NOCRED || kauth_cred_geteuid(C) == 0) && \
LFS_EST_BFREE(F) >= (BB)) || \
(kauth_cred_geteuid(C) != 0 && IS_FREESPACE(F, BB)))
/* Can an ordinary user write BB blocks */
#define IS_FREESPACE(F, BB) \
(LFS_EST_BFREE(F) >= (BB) + LFS_EST_RSVD(F))
/*
* The minimum number of blocks to create a new inode. This is:
* directory direct block (1) + ULFS_NIADDR indirect blocks + inode block (1) +
* ifile direct block (1) + ULFS_NIADDR indirect blocks = 3 + 2 * ULFS_NIADDR blocks.
*/
#define LFS_NRESERVE(F) (lfs_btofsb((F), (2 * ULFS_NIADDR + 3) << (F)->lfs_bshift))
/* 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 */
};
#define LFCNSEGWAITALL _FCNR_FSPRIV('L', 14, struct timeval)
#define LFCNSEGWAIT _FCNR_FSPRIV('L', 15, struct timeval)
#define LFCNBMAPV _FCNRW_FSPRIV('L', 2, struct lfs_fcntl_markv)
#define LFCNMARKV _FCNRW_FSPRIV('L', 3, 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_ */
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