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/*
* Copyright (c) 1982, 1986 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* from: @(#)fs.h 7.12 (Berkeley) 5/8/91
* $Id: fs.h,v 1.6 1993/12/19 22:51:09 alm Exp $
*/
/*
* All on-disk filesystem structures, #defines, etc. are here, taken as-is
* from FreeBSD, with minor modifications where needed. This file should be
* #included as little as possible, as most #defines here don't have any
* prefix, thus they may conflict with other system-wide ones.
*/
#ifndef _UFS_H_
#define _UFS_H_ 1
#include <linux/types.h> /* compatible enough with BSD */
#define DEV_BSIZE 512 /* Assuming filesystem created on 512b/sector */
/* types that are are missing in <linux/types.h> */
typedef long long int quad_t;
typedef unsigned long long int u_quad_t;
/*
* Each disk drive contains some number of file systems.
* A file system consists of a number of cylinder groups.
* Each cylinder group has inodes and data.
*
* A file system is described by its super-block, which in turn
* describes the cylinder groups. The super-block is critical
* data and is replicated in each cylinder group to protect against
* catastrophic loss. This is done at `newfs' time and the critical
* super-block data does not change, so the copies need not be
* referenced further unless disaster strikes.
*
* For file system fs, the offsets of the various blocks of interest
* are given in the super block as:
* [fs->fs_sblkno] Super-block
* [fs->fs_cblkno] Cylinder group block
* [fs->fs_iblkno] Inode blocks
* [fs->fs_dblkno] Data blocks
* The beginning of cylinder group cg in fs, is given by
* the ``cgbase(fs, cg)'' macro.
*
* The first boot and super blocks are given in absolute disk addresses.
* The byte-offset forms are preferred, as they don't imply a sector size.
*/
#define BBSIZE 8192
#define SBSIZE 8192
#define BBOFF ((off_t)(0))
#define SBOFF ((off_t)(BBOFF + BBSIZE))
#define BBLOCK ((daddr_t)(0))
#define SBLOCK ((daddr_t)(BBLOCK + BBSIZE / DEV_BSIZE))
/*
* Addresses stored in inodes are capable of addressing fragments
* of `blocks'. File system blocks of at most size MAXBSIZE can
* be optionally broken into 2, 4, or 8 pieces, each of which is
* addressible; these pieces may be DEV_BSIZE, or some multiple of
* a DEV_BSIZE unit.
*
* Large files consist of exclusively large data blocks. To avoid
* undue wasted disk space, the last data block of a small file may be
* allocated as only as many fragments of a large block as are
* necessary. The file system format retains only a single pointer
* to such a fragment, which is a piece of a single large block that
* has been divided. The size of such a fragment is determinable from
* information in the inode, using the ``blksize(fs, ip, lbn)'' macro.
*
* The file system records space availability at the fragment level;
* to determine block availability, aligned fragments are examined.
*
* 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 ROOTINO ((ino_t)2)
/*
* MINBSIZE is the smallest allowable block size.
* In order to insure that it is possible to create files of size
* 2^32 with only two levels of indirection, MINBSIZE is set to 4096.
* MINBSIZE must be big enough to hold a cylinder group block,
* thus changes to (struct cg) must keep its size within MINBSIZE.
* Note that super blocks are always of size SBSIZE,
* and that both SBSIZE and MAXBSIZE must be >= MINBSIZE.
*/
#define MINBSIZE 4096
#define MAXFRAG 64
/*
* The path name on which the file system is mounted is maintained
* in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
* the super block for this name.
* The limit on the amount of summary information per file system
* is defined by MAXCSBUFS. It is currently parameterized for a
* maximum of two million cylinders.
*/
#define MAXMNTLEN 512
#define MAXCSBUFS 32
/*
* A summary of contiguous blocks of various sizes is maintained
* in each cylinder group. Normally this is set by the initial
* value of fs_maxcontig. To conserve space, a maximum summary size
* is set by FS_MAXCONTIG.
*/
#define FS_MAXCONTIG 16
/*
* MINFREE gives the minimum acceptable percentage of file system
* blocks which may be free. If the freelist drops below this level
* only the superuser may continue to allocate blocks. This may
* be set to 0 if no reserve of free blocks is deemed necessary,
* however throughput drops by fifty percent if the file system
* is run at between 95% and 100% full; thus the minimum default
* value of fs_minfree is 5%. However, to get good clustering
* performance, 10% is a better choice. hence we use 10% as our
* default value. With 10% free space, fragmentation is not a
* problem, so we choose to optimize for time.
*/
#define MINFREE 5
#define DEFAULTOPT FS_OPTTIME
/*
* Per cylinder group information; summarized in blocks allocated
* from first cylinder group data blocks. These blocks have to be
* read in from fs_csaddr (size fs_cssize) in addition to the
* super block.
*
* N.B. sizeof(struct csum) must be a power of two in order for
* the ``fs_cs'' macro to work (see below).
*/
struct csum {
long cs_ndir; /* number of directories */
long cs_nbfree; /* number of free blocks */
long cs_nifree; /* number of free inodes */
long cs_nffree; /* number of free frags */
};
/*
* Super block for a file system.
*/
#define FS_MAGIC 0x00011954
#define FSOKAY 0x7c269d38 /* superblock checksum */
struct ufs_super_block
{
struct ufs_super_block *fs_link;/* linked list of file systems */
struct ufs_super_block *fs_rlink;/* used for incore super blocks */
daddr_t fs_sblkno; /* addr of super-block in filesys */
daddr_t fs_cblkno; /* offset of cyl-block in filesys */
daddr_t fs_iblkno; /* offset of inode-blocks in filesys */
daddr_t fs_dblkno; /* offset of first data after cg */
long fs_cgoffset; /* cylinder group offset in cylinder */
long fs_cgmask; /* used to calc mod fs_ntrak */
time_t fs_time; /* last time written */
long fs_size; /* number of blocks in fs */
long fs_dsize; /* number of data blocks in fs */
long fs_ncg; /* number of cylinder groups */
long fs_bsize; /* size of basic blocks in fs */
long fs_fsize; /* size of frag blocks in fs */
long fs_frag; /* number of frags in a block in fs */
/* these are configuration parameters */
long fs_minfree; /* minimum percentage of free blocks */
long fs_rotdelay; /* num of ms for optimal next block */
long fs_rps; /* disk revolutions per second */
/* these fields can be computed from the others */
long fs_bmask; /* ``blkoff'' calc of blk offsets */
long fs_fmask; /* ``fragoff'' calc of frag offsets */
long fs_bshift; /* ``lblkno'' calc of logical blkno */
long fs_fshift; /* ``numfrags'' calc number of frags */
/* these are configuration parameters */
long fs_maxcontig; /* max number of contiguous blks */
long fs_maxbpg; /* max number of blks per cyl group */
/* these fields can be computed from the others */
long fs_fragshift; /* block to frag shift */
long fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
long fs_sbsize; /* actual size of super block */
long fs_csmask; /* csum block offset */
long fs_csshift; /* csum block number */
long fs_nindir; /* value of NINDIR */
long fs_inopb; /* value of INOPB */
long fs_nspf; /* value of NSPF */
/* yet another configuration parameter */
long fs_optim; /* optimization preference, see below */
/* these fields are derived from the hardware */
long fs_npsect; /* # sectors/track including spares */
long fs_interleave; /* hardware sector interleave */
long fs_trackskew; /* sector 0 skew, per track */
long fs_headswitch; /* head switch time, usec */
long fs_trkseek; /* track-to-track seek, usec */
/* sizes determined by number of cylinder groups and their sizes */
daddr_t fs_csaddr; /* blk addr of cyl grp summary area */
long fs_cssize; /* size of cyl grp summary area */
long fs_cgsize; /* cylinder group size */
/* these fields are derived from the hardware */
long fs_ntrak; /* tracks per cylinder */
long fs_nsect; /* sectors per track */
long fs_spc; /* sectors per cylinder */
/* this comes from the disk driver partitioning */
long fs_ncyl; /* cylinders in file system */
/* these fields can be computed from the others */
long fs_cpg; /* cylinders per group */
long fs_ipg; /* inodes per group */
long fs_fpg; /* blocks per group * fs_frag */
/* this data must be re-computed after crashes */
struct csum fs_cstotal; /* cylinder summary information */
/* these fields are cleared at mount time */
char fs_fmod; /* super block modified flag */
char fs_clean; /* file system is clean flag */
char fs_ronly; /* mounted read-only flag */
char fs_flags; /* currently unused flag */
char fs_fsmnt[MAXMNTLEN]; /* name mounted on */
/* these fields retain the current block allocation info */
long fs_cgrotor; /* last cg searched */
struct csum *fs_csp[MAXCSBUFS];/* list of fs_cs info buffers */
long fs_cpc; /* cyl per cycle in postbl */
short fs_opostbl[16][8]; /* old rotation block list head */
long fs_sparecon[50]; /* reserved for future constants */
long fs_contigsumsize; /* size of cluster summary array */
long fs_maxsymlinklen; /* max length of an internal symlink */
long fs_inodefmt; /* format of on-disk inodes */
u_quad_t fs_maxfilesize; /* maximum representable file size */
union {
struct {
long fs_state; /* validate fs_clean field */
quad_t fs_qbmask; /* ~fs_bmask - for use with quad size */
quad_t fs_qfmask; /* ~fs_fmask - for use with quad size */
} fs_v7;
struct {
quad_t fs_qbmask; /* ~fs_bmask - for use with quad size */
quad_t fs_qfmask; /* ~fs_fmask - for use with quad size */
long fs_state; /* validate fs_clean field */
} fs_v8;
} fs_u1;
long fs_postblformat; /* format of positional layout tables */
long fs_nrpos; /* number of rotational positions */
long fs_postbloff; /* (short) rotation block list head */
long fs_rotbloff; /* (u_char) blocks for each rotation */
long fs_magic; /* magic number */
u_char fs_space[1]; /* list of blocks for each rotation */
/* actually longer */
};
/*
* Filesystem identification
*/
#define FS_42INODEFMT -1 /* 4.2BSD inode format */
#define FS_44INODEFMT 2 /* 4.4BSD inode format */
#if 0 /* need to take into account fs_convert */
/*
* Preference for optimization.
*/
#define FS_OPTTIME 0 /* minimize allocation time */
#define FS_OPTSPACE 1 /* minimize disk fragmentation */
/*
* Rotational layout table format types
*/
#define FS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
#define FS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
/*
* Macros for access to superblock array structures
*/
#define fs_postbl(fs, cylno) \
(((fs)->fs_postblformat == FS_42POSTBLFMT) \
? ((fs)->fs_opostbl[cylno]) \
: ((short *)((char *)(fs) + (fs)->fs_postbloff) + (cylno) * (fs)->fs_nrpos))
#define fs_rotbl(fs) \
(((fs)->fs_postblformat == FS_42POSTBLFMT) \
? ((fs)->fs_space) \
: ((u_char *)((char *)(fs) + (fs)->fs_rotbloff)))
/*
* The size of a cylinder group is calculated by CGSIZE. The maximum size
* is limited by the fact that cylinder groups are at most one block.
* Its size is derived from the size of the maps maintained in the
* cylinder group and the (struct cg) size.
*/
#define CGSIZE(fs) \
/* base cg */ (sizeof(struct cg) + sizeof(long) + \
/* blktot size */ (fs)->fs_cpg * sizeof(long) + \
/* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \
/* inode map */ howmany((fs)->fs_ipg, NBBY) + \
/* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY) +\
/* if present */ ((fs)->fs_contigsumsize <= 0 ? 0 : \
/* cluster sum */ (fs)->fs_contigsumsize * sizeof(long) + \
/* cluster map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPB(fs), NBBY)))
/*
* Convert cylinder group to base address of its global summary info.
*
* N.B. This macro assumes that sizeof(struct csum) is a power of two.
*/
#define fs_cs(fs, indx) \
fs_csp[(indx) >> (fs)->fs_csshift][(indx) & ~(fs)->fs_csmask]
#endif
/*
* Cylinder group block for a file system.
*/
#define CG_MAGIC 0x00090255
struct cg {
struct cg *cg_link; /* linked list of cyl groups */
long cg_magic; /* magic number */
time_t cg_time; /* time last written */
long cg_cgx; /* we are the cgx'th cylinder group */
short cg_ncyl; /* number of cyl's this cg */
short cg_niblk; /* number of inode blocks this cg */
long cg_ndblk; /* number of data blocks this cg */
struct csum cg_cs; /* cylinder summary information */
long cg_rotor; /* position of last used block */
long cg_frotor; /* position of last used frag */
long cg_irotor; /* position of last used inode */
long cg_frsum[MAXFRAG]; /* counts of available frags */
long cg_btotoff; /* (long) block totals per cylinder */
long cg_boff; /* (short) free block positions */
long cg_iusedoff; /* (char) used inode map */
long cg_freeoff; /* (u_char) free block map */
long cg_nextfreeoff; /* (u_char) next available space */
long cg_clustersumoff; /* (long) counts of avail clusters */
long cg_clusteroff; /* (char) free cluster map */
long cg_nclusterblks; /* number of clusters this cg */
long cg_sparecon[13]; /* reserved for future use */
u_char cg_space[1]; /* space for cylinder group maps */
/* actually longer */
};
/*
* The following structure is defined
* for compatibility with old file systems.
*/
struct ocg {
struct ocg *cg_link; /* linked list of cyl groups */
struct ocg *cg_rlink; /* used for incore cyl groups */
time_t cg_time; /* time last written */
long cg_cgx; /* we are the cgx'th cylinder group */
short cg_ncyl; /* number of cyl's this cg */
short cg_niblk; /* number of inode blocks this cg */
long cg_ndblk; /* number of data blocks this cg */
struct csum cg_cs; /* cylinder summary information */
long cg_rotor; /* position of last used block */
long cg_frotor; /* position of last used frag */
long cg_irotor; /* position of last used inode */
long cg_frsum[8]; /* counts of available frags */
long cg_btot[32]; /* block totals per cylinder */
short cg_b[32][8]; /* positions of free blocks */
char cg_iused[256]; /* used inode map */
long cg_magic; /* magic number */
u_char cg_free[1]; /* free block map */
/* actually longer */
};
/*
* Macros for access to cylinder group array structures
*/
#define cg_blktot(fs, cgp) \
(((cgp)->cg_magic != (fs)->fs_cg_magic) \
? (((struct ocg *)(cgp))->cg_btot) \
: ((long *)((char *)(cgp) + (cgp)->cg_btotoff)))
#define cg_blks(fs, cgp, cylno) \
(((cgp)->cg_magic != (fs)->fs_cg_magic) \
? (((struct ocg *)(cgp))->cg_b[cylno]) \
: ((short *)((char *)(cgp) + (cgp)->cg_boff) + (cylno) * (fs)->fs_nrpos))
#define cg_inosused(fs, cgp) \
(((cgp)->cg_magic != (fs)->fs_cg_magic) \
? (((struct ocg *)(cgp))->cg_iused) \
: ((char *)((char *)(cgp) + (cgp)->cg_iusedoff)))
#define cg_blksfree(fs, cgp) \
(((cgp)->cg_magic != (fs)->fs_cg_magic) \
? (((struct ocg *)(cgp))->cg_free) \
: ((u_char *)((char *)(cgp) + (cgp)->cg_freeoff)))
#define cg_chkmagic(fs, cgp) \
((cgp)->cg_magic == (fs)->fs_cg_magic \
|| ((struct ocg *)(cgp))->cg_magic == (fs)->fs_cg_magic)
/* new ffs v8 only */
#define cg_clustersfree(cgp) \
((u_char *)((char *)(cgp) + (cgp)->cg_clusteroff))
#define cg_clustersum(cgp) \
((long *)((char *)(cgp) + (cgp)->cg_clustersumoff))
/*
* Turn file system block numbers into disk block addresses.
* This maps file system blocks to device size blocks.
*/
/*
#define fsbtodb(fs, b) ((b) << (fs)->fs_fsbtodb)
#define dbtofsb(fs, b) ((b) >> (fs)->fs_fsbtodb)
*/
/* When fs_fsbtodb is a negative number, shifting should be done in the
* reverse direction.
*/
#define fsbtodb(fs, b) ((fs)->fs_fsbtodb > 0 ? (b) << (fs)->fs_fsbtodb : \
(b) >> -(fs)->fs_fsbtodb)
#define dbtofsb(fs, b) ((fs)->fs_fsbtodb > 0 ? (b) >> (fs)->fs_fsbtodb : \
(b) << -(fs)->fs_fsbtodb)
/*
* Cylinder group macros to locate things in cylinder groups.
* They calc file system addresses of cylinder group data structures.
*/
#define cgbase(fs, c) ((daddr_t)((fs)->fs_fpg * (c)))
#define cgstart(fs, c) \
(cgbase(fs, c) + (fs)->fs_cgoffset * ((c) & ~((fs)->fs_cgmask)))
#define cgsblock(fs, c) (cgstart(fs, c) + (fs)->fs_sblkno) /* super blk */
#define cgtod(fs, c) (cgstart(fs, c) + (fs)->fs_cblkno) /* cg block */
#define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */
#define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */
/*
* Macros for handling inode numbers:
* inode number to file system block offset.
* inode number to cylinder group number.
* inode number to file system block address.
*/
#define ino_to_cg(fs, x) ((x) / (fs)->fs_ipg)
#define ino_to_fsba(fs, x) \
((daddr_t)(cgimin(fs, ino_to_cg(fs, x)) + \
(blkstofrags((fs), (((x) % (fs)->fs_ipg) / INOPB(fs))))))
#define ino_to_fsbo(fs, x) ((x) % INOPB(fs))
/*
* Give cylinder group number for a file system block.
* Give cylinder group block number for a file system block.
*/
#define dtog(fs, d) ((d) / (fs)->fs_fpg)
#define dtogd(fs, d) ((d) % (fs)->fs_fpg)
/*
* Extract the bits for a block from a map.
* Compute the cylinder and rotational position of a cyl block addr.
*/
#define blkmap(fs, map, loc) \
(((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag)))
#if 0
#define cbtocylno(fs, bno) \
((bno) * NSPF(fs) / (fs)->fs_spc)
#define cbtorpos(fs, bno) \
(((bno) * NSPF(fs) % (fs)->fs_spc / (fs)->fs_nsect * (fs)->fs_trackskew + \
(bno) * NSPF(fs) % (fs)->fs_spc % (fs)->fs_nsect * (fs)->fs_interleave) % \
(fs)->fs_nsect * (fs)->fs_nrpos / (fs)->fs_npsect)
#endif
/*
* The following macros optimize certain frequently calculated
* quantities by using shifts and masks in place of divisions
* modulos and multiplications.
*/
#define blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \
((loc) & ~(fs)->fs_bmask)
#define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \
((loc) & ~(fs)->fs_fmask)
#define lblktosize(fs, blk) /* calculates (blk * fs->fs_bsize) */ \
((blk) << (fs)->fs_bshift)
#define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \
((loc) >> (fs)->fs_bshift)
#define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \
((loc) >> (fs)->fs_fshift)
#define blkroundup(fs, size) /* calculates roundup(size, fs->fs_bsize) */ \
(((size) + (fs)->fs_bsize - 1) & (fs)->fs_bmask)
#define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \
(((size) + (fs)->fs_fsize - 1) & (fs)->fs_fmask)
#define fragstoblks(fs, frags) /* calculates (frags / fs->fs_frag) */ \
((frags) >> (fs)->fs_fragshift)
#define blkstofrags(fs, blks) /* calculates (blks * fs->fs_frag) */ \
((blks) << (fs)->fs_fragshift)
#define fragnum(fs, fsb) /* calculates (fsb % fs->fs_frag) */ \
((fsb) & ((fs)->fs_frag - 1))
#define blknum(fs, fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \
((fsb) &~ ((fs)->fs_frag - 1))
/*
* Determine the number of available frags given a
* percentage to hold in reserve
*/
#define freespace(fs, percentreserved) \
(blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \
(fs)->fs_cstotal.cs_nffree - ((fs)->fs_dsize * (percentreserved) / 100))
#if 0
/*
* Determining the size of a file block in the file system.
*/
#define blksize(fs, ip, lbn) \
(((lbn) >= NDADDR || dtohq(fs,(ip)->di_size) >= ((lbn) + 1) << (fs)->fs_bshift) \
? (fs)->fs_bsize \
: (fragroundup(fs, blkoff(fs, dtohq(fs,(ip)->di_size)))))
#define dblksize(fs, dip, lbn) \
(((lbn) >= NDADDR || dtohq(fs,(dip)->di_size) >= ((lbn) + 1) << (fs)->fs_bshift) \
? (fs)->fs_bsize \
: (fragroundup(fs, blkoff(fs, dtohq(fs,(dip)->di_size)))))
#endif
#if 0
/*
* Number of disk sectors per block; assumes DEV_BSIZE byte sector size.
*/
#define NSPB(fs) ((fs)->fs_nspf << (fs)->fs_fragshift)
#define NSPF(fs) ((fs)->fs_nspf)
#endif
/*
* INOPB is the number of inodes in a secondary storage block.
*/
#define INOPB(fs) ((fs)->fs_inopb)
#define INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift)
/*
* NINDIR is the number of indirects in a file system block.
*/
#define NINDIR(fs) ((fs)->fs_nindir)
/*
* FNINDIR, same as NINDIR, but refers to block-pointers per
* fragment rather than block. we are unable to treat complete blocks,
* so this IS required.
*/
#define DNINDIR(fs) ((fs)->fs_fsize/sizeof(daddr_t))
/* dinode.h stuff */
#define NDADDR 12 /* direct addresses in inode */
#define NIADDR 3 /* indirect addresses in inode */
#define MAXFASTLINK (((NDADDR+NIADDR) * sizeof(daddr_t)) - 1)
struct dinode {
u_short di_mode; /* 0: mode and type of file */
short di_nlink; /* 2: number of links to file */
uid_t di_uid; /* 4: owner's user id */
gid_t di_gid; /* 6: owner's group id */
u_quad_t di_qsize; /* 8: number of bytes in file */
time_t di_atime; /* 16: time last accessed */
long di_atspare;
time_t di_mtime; /* 24: time last modified */
long di_mtspare;
time_t di_ctime; /* 32: last time inode changed */
long di_ctspare;
union {
struct {
daddr_t di_udb[NDADDR]; /* 40: disk block addresses */
daddr_t di_uib[NIADDR]; /* 88: indirect blocks */
} di_addr;
char di_usymlink[MAXFASTLINK+1];
} di_un;
long di_flags; /* 100: status, currently unused */
long di_blocks; /* 104: blocks actually held */
long di_gen; /* 108: generation number */
#define DI_SPARE_SZ 4 /* 112: spare for 4 longs */
u_long di_spare[DI_SPARE_SZ]; /* reserved (unused) */
};
/*
* Number of inodes per block (linux buffer-cache block).
*/
#define NIPB (BLOCK_SIZE/sizeof(struct dinode))
#define di_size di_qsize
#define di_db di_un.di_addr.di_udb
#define di_ib di_un.di_addr.di_uib
#define di_symlink di_un.di_usymlink
#define di_rdev di_db[0]
/* file modes */
#define IFMT 0170000 /* mask of file type */
#define IFIFO 0010000 /* named pipe (fifo) */
#define IFCHR 0020000 /* character special device */
#define IFDIR 0040000 /* directory */
#define IFBLK 0060000 /* block special device */
#define IFREG 0100000 /* regular file */
#define IFLNK 0120000 /* symbolic link */
#define IFSOCK 0140000 /* UNIX domain socket */
#define ISUID 04000 /* set user identifier when exec'ing */
#define ISGID 02000 /* set group identifier when exec'ing */
#define ISVTX 01000 /* save execution information on exit */
#define IREAD 0400 /* read permission */
#define IWRITE 0200 /* write permission */
#define IEXEC 0100 /* execute permission */
#define DFASTLINK(i) \
((((i)->i_mode & IFMT) == IFLNK) && \
((i)->i_size <= MAXFASTLINK) && \
((i)->i_size == (i)->u.ufs_i.i_spare[0]))
/* Taken from dir.h: */
#define DIRBLKSIZ DEV_BSIZE
#define MAXNAMLEN 255
struct ufs_dir_entry {
u_long d_ino; /* inode number of entry */
u_short d_reclen; /* length of this record */
union {
struct {
u_short d_namlen; /* length of string in d_name */
} d_standard;
struct {
u_char d_type; /* file type, see below */
u_char d_namlen; /* length of string in d_name */
} d_freebsd2; /* FreeBSD 2.0 hack */
} d_u1;
char d_name[MAXNAMLEN + 1]; /* name with length <= MAXNAMLEN */
};
/*
* FreeBSD 2.0 file types
*/
#define DT_UNKNOWN 0
#define DT_FIFO 1
#define DT_CHR 2
#define DT_DIR 4
#define DT_BLK 6
#define DT_REG 8
#define DT_LNK 10
#define DT_SOCK 12
#define ufs_namlen(fs,dp) \
((fs)->fs_freebsd2 \
? (dp)->d_u1.d_freebsd2.d_namlen \
: dtohs(fs,(dp)->d_u1.d_standard.d_namlen))
#if 0
/*
* The DIRSIZ macro gives the minimum record length which will hold
* the directory entry. This requires the amount of space in struct 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 DIRSIZ(fs,dp) \
((sizeof (struct ufs_dir_entry) - (MAXNAMLEN+1)) + ((ufs_namlen(fs,dp)+1 + 3) &~ 3))
/*
* Template for manipulating directories.
* Should use struct direct's, but the name field
* is MAXNAMLEN - 1, and this just won't do.
*/
struct dirtemplate {
u_long dot_ino;
short dot_reclen;
short dot_namlen;
char dot_name[4]; /* must be multiple of 4 */
u_long dotdot_ino;
short dotdot_reclen;
short dotdot_namlen;
char dotdot_name[4]; /* ditto */
};
#endif
/* endianness conversions */
/* host <--> disk for "short"s */
static inline unsigned short dtohs (struct ufs_sb_info * sb, unsigned short x)
{
if (sb->fs_convert) {
#ifdef __i386__
__asm__("xchgb %b0,%h0" : "=q" (x) : "0" (x));
#else
x = ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8);
#endif
}
return x;
}
#define htods dtohs
/* host <--> disk for "long"s */
static inline unsigned long dtohl (struct ufs_sb_info * sb, unsigned long x)
{
if (sb->fs_convert) {
#ifdef __i386__
__asm__("xchgb %b0,%h0 ; rorl $16,%0 ; xchgb %b0,%h0"
: "=q" (x) : "0" (x));
#else
x = ((x & 0x000000ff) << 24) | ((x & 0x0000ff00) << 8)
| ((x & 0x00ff0000) >> 8) | ((x & 0xff000000) >> 24);
#endif
}
return x;
}
#define htodl dtohl
/* host <--> disk for "long long"s ("quad"s) */
static inline unsigned long long dtohq (struct ufs_sb_info * sb, unsigned long long x)
{
if (sb->fs_convert) {
unsigned long x0 = (unsigned long) x;
unsigned long x1 = (unsigned long) (x >> 32);
#ifdef __i386__
__asm__("xchgb %b0,%h0 ; rorl $16,%0 ; xchgb %b0,%h0"
: "=q" (x0) : "0" (x0));
__asm__("xchgb %b0,%h0 ; rorl $16,%0 ; xchgb %b0,%h0"
: "=q" (x1) : "0" (x1));
#else
x0 = ((x0 & 0x000000ff) << 24) | ((x0 & 0x0000ff00) << 8)
| ((x0 & 0x00ff0000) >> 8) | ((x0 & 0xff000000) >> 24);
x1 = ((x1 & 0x000000ff) << 24) | ((x1 & 0x0000ff00) << 8)
| ((x1 & 0x00ff0000) >> 8) | ((x1 & 0xff000000) >> 24);
#endif
x = ((unsigned long long) x0 << 32) | (unsigned long long) x1;
}
return x;
}
#define htodq dtohq
#endif /* _UFS_H_ */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.