diff options
Diffstat (limited to 'ufs/fs.h')
-rw-r--r-- | ufs/fs.h | 317 |
1 files changed, 176 insertions, 141 deletions
@@ -1,44 +1,36 @@ -/* Format of a filesystem on disk (superblock and cylinder groups) - Copyright (C) 1991, 1993, 1994 Free Software Foundation - -This file is part of the GNU Hurd. - -The GNU Hurd is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -The GNU Hurd is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with the GNU Hurd; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -/* Modified from UCB by Michael I. Bushnell. */ - /* - * Copyright (c) 1982, 1986 Regents of the University of California. - * All rights reserved. + * Copyright (c) 1982, 1986, 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. 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. * - * Redistribution is only permitted until one year after the first shipment - * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and - * binary forms are permitted provided that: (1) source distributions retain - * this entire copyright notice and comment, and (2) distributions including - * binaries display the following acknowledgement: This product includes - * software developed by the University of California, Berkeley and its - * contributors'' in the documentation or other materials provided with the - * distribution and in all advertising materials mentioning features or use - * of this software. 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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * 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. * - * @(#)fs.h 7.10 (Berkeley) 6/28/90 + * @(#)fs.h 8.7 (Berkeley) 4/19/94 */ /* @@ -89,15 +81,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ * * 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) /* i number of all roots */ /* * MINBSIZE is the smallest allowable block size. @@ -120,7 +104,29 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ */ #define MAXMNTLEN 512 #define MAXCSBUFS 32 -#define MAXFRAG 8 + +/* + * 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 @@ -141,10 +147,7 @@ struct csum { /* * Super block for a file system. */ -#define FS_MAGIC 0x011954 -#define FSOKAY 0x7c269d38 -struct fs -{ +struct fs { struct fs *fs_link; /* linked list of file systems */ struct fs *fs_rlink; /* used for incore super blocks */ daddr_t fs_sblkno; /* addr of super-block in filesys */ @@ -153,7 +156,7 @@ struct fs 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 */ - long fs_time; /* last time written */ + 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 */ @@ -216,19 +219,30 @@ struct fs 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[55]; /* reserved for future constants */ + 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 */ + 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 */ - quad fs_qbmask; /* ~fs_bmask - for use with quad size */ - quad fs_qfmask; /* ~fs_fmask - for use with quad size */ long fs_postblformat; /* format of positional layout tables */ - long fs_nrpos; /* number of rotaional positions */ + 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 */ - unsigned char fs_space[1]; /* list of blocks for each rotation */ + u_char fs_space[1]; /* list of blocks for each rotation */ /* actually longer */ }; /* + * Filesystem idetification + */ +#define FS_MAGIC 0x011954 /* the fast filesystem magic number */ +#define FS_OKAY 0x7c269d38 /* superblock checksum */ +#define FS_42INODEFMT -1 /* 4.2BSD inode format */ +#define FS_44INODEFMT 2 /* 4.4BSD inode format */ +/* * Preference for optimization. */ #define FS_OPTTIME 0 /* minimize allocation time */ @@ -242,23 +256,38 @@ struct fs /* * Macros for access to superblock array structures */ -#define fs_postbl(cylno) \ - ((sblock->fs_postblformat == FS_42POSTBLFMT) \ - ? (sblock->fs_opostbl[cylno]) \ - : ((short *)((char *)sblock + sblock->fs_postbloff) \ - + (cylno) * sblock->fs_nrpos)) -#define fs_rotbl \ - ((sblock->fs_postblformat == FS_42POSTBLFMT) \ - ? (sblock->fs_space) \ - : ((unsigned char *)((char *)sblock + sblock->fs_rotbloff))) +#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(indx) \ - fs_csp[(indx) >> sblock->fs_csshift][(indx) & ~sblock->fs_csmask] +#define fs_cs(fs, indx) \ + fs_csp[(indx) >> (fs)->fs_csshift][(indx) & ~(fs)->fs_csmask] /* * Cylinder group block for a file system. @@ -267,7 +296,7 @@ struct fs struct cg { struct cg *cg_link; /* linked list of cyl groups */ long cg_magic; /* magic number */ - long cg_time; /* time last written */ + 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 */ @@ -282,8 +311,11 @@ struct cg { 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_sparecon[16]; /* reserved for future use */ - unsigned char cg_space[1]; /* space for cylinder group maps */ + 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 */ }; /* @@ -293,10 +325,10 @@ struct cg { (((cgp)->cg_magic != CG_MAGIC) \ ? (((struct ocg *)(cgp))->cg_btot) \ : ((long *)((char *)(cgp) + (cgp)->cg_btotoff))) -#define cg_blks(cgp, cylno) \ +#define cg_blks(fs, cgp, cylno) \ (((cgp)->cg_magic != CG_MAGIC) \ ? (((struct ocg *)(cgp))->cg_b[cylno]) \ - : ((short *)((char *)(cgp) + (cgp)->cg_boff) + (cylno) * sblock->fs_nrpos)) + : ((short *)((char *)(cgp) + (cgp)->cg_boff) + (cylno) * (fs)->fs_nrpos)) #define cg_inosused(cgp) \ (((cgp)->cg_magic != CG_MAGIC) \ ? (((struct ocg *)(cgp))->cg_iused) \ @@ -304,9 +336,13 @@ struct cg { #define cg_blksfree(cgp) \ (((cgp)->cg_magic != CG_MAGIC) \ ? (((struct ocg *)(cgp))->cg_free) \ - : ((unsigned char *)((char *)(cgp) + (cgp)->cg_freeoff))) + : ((u_char *)((char *)(cgp) + (cgp)->cg_freeoff))) #define cg_chkmagic(cgp) \ ((cgp)->cg_magic == CG_MAGIC || ((struct ocg *)(cgp))->cg_magic == CG_MAGIC) +#define cg_clustersfree(cgp) \ + ((u_char *)((char *)(cgp) + (cgp)->cg_clusteroff)) +#define cg_clustersum(cgp) \ + ((long *)((char *)(cgp) + (cgp)->cg_clustersumoff)) /* * The following structure is defined @@ -315,7 +351,7 @@ struct cg { struct ocg { struct ocg *cg_link; /* linked list of cyl groups */ struct ocg *cg_rlink; /* used for incore cyl groups */ - long cg_time; /* time last written */ + 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 */ @@ -329,7 +365,7 @@ struct ocg { short cg_b[32][8]; /* positions of free blocks */ char cg_iused[256]; /* used inode map */ long cg_magic; /* magic number */ - unsigned char cg_free[1]; /* free block map */ + u_char cg_free[1]; /* free block map */ /* actually longer */ }; @@ -337,20 +373,20 @@ struct ocg { * Turn file system block numbers into disk block addresses. * This maps file system blocks to device size blocks. */ -#define fsbtodb(b) ((b) << sblock->fs_fsbtodb) -#define dbtofsb(b) ((b) >> sblock->fs_fsbtodb) +#define fsbtodb(fs, b) ((b) << (fs)->fs_fsbtodb) +#define dbtofsb(fs, b) ((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(c) ((daddr_t)(sblock->fs_fpg * (c))) -#define cgstart(c) \ - (cgbase(c) + sblock->fs_cgoffset * ((c) & ~(sblock->fs_cgmask))) -#define cgsblock(c) (cgstart(c) + sblock->fs_sblkno) /* super blk */ -#define cgtod(c) (cgstart(c) + sblock->fs_cblkno) /* cg block */ -#define cgimin(c) (cgstart(c) + sblock->fs_iblkno) /* inode blk */ -#define cgdmin(c) (cgstart(c) + sblock->fs_dblkno) /* 1st data */ +#define cgbase(fs, c) ((daddr_t)((fs)->fs_fpg * (c))) +#define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */ +#define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */ +#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 cgstart(fs, c) \ + (cgbase(fs, c) + (fs)->fs_cgoffset * ((c) & ~((fs)->fs_cgmask))) /* * Macros for handling inode numbers: @@ -358,97 +394,96 @@ struct ocg { * inode number to cylinder group number. * inode number to file system block address. */ -#define itoo(x) ((x) % INOPB) -#define itog(x) ((x) / sblock->fs_ipg) -#define itod(x) \ - ((daddr_t)(cgimin(itog(x)) + \ - (blkstofrags((((x) % sblock->fs_ipg) / INOPB))))) +#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(d) ((d) / sblock->fs_fpg) -#define dtogd(d) ((d) % sblock->fs_fpg) +#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(map, loc) \ - (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - sblock->fs_frag))) -#define cbtocylno(bno) \ - ((bno) * NSPF / sblock->fs_spc) -#define cbtorpos(bno) \ - (((bno) * NSPF % sblock->fs_spc / sblock->fs_nsect * sblock->fs_trackskew + \ - (bno) * NSPF % sblock->fs_spc % sblock->fs_nsect * sblock->fs_interleave) % \ - sblock->fs_nsect * sblock->fs_nrpos / sblock->fs_npsect) +#define blkmap(fs, map, loc) \ + (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag))) +#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) /* * The following macros optimize certain frequently calculated * quantities by using shifts and masks in place of divisions * modulos and multiplications. */ -#define blkoff(loc) /* calculates (loc % fs->fs_bsize) */ \ - ((loc) & ~sblock->fs_bmask) -#define fragoff(loc) /* calculates (loc % fs->fs_fsize) */ \ - ((loc) & ~sblock->fs_fmask) -#define lblktosize(blk) /* calculates (blk * fs->fs_bsize) */ \ - ((blk) << sblock->fs_bshift) -#define lblkno(loc) /* calculates (loc / fs->fs_bsize) */ \ - ((loc) >> sblock->fs_bshift) -#define numfrags(loc) /* calculates (loc / fs->fs_fsize) */ \ - ((loc) >> sblock->fs_fshift) -#define blkroundup(size) /* calculates roundup(size, fs->fs_bsize) */ \ - (((size) + sblock->fs_bsize - 1) & sblock->fs_bmask) -#define fragroundup(size) /* calculates roundup(size, fs->fs_fsize) */ \ - (((size) + sblock->fs_fsize - 1) & sblock->fs_fmask) -#define fragstoblks(frags) /* calculates (frags / fs->fs_frag) */ \ - ((frags) >> sblock->fs_fragshift) -#define blkstofrags(blks) /* calculates (blks * fs->fs_frag) */ \ - ((blks) << sblock->fs_fragshift) -#define fragnum(fsb) /* calculates (fsb % fs->fs_frag) */ \ - ((fsb) & (sblock->fs_frag - 1)) -#define blknum(fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \ - ((fsb) &~ (sblock->fs_frag - 1)) +#define blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \ + ((loc) & (fs)->fs_qbmask) +#define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \ + ((loc) & (fs)->fs_qfmask) +#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_qbmask) & (fs)->fs_bmask) +#define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \ + (((size) + (fs)->fs_qfmask) & (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(percentreserved) \ - (blkstofrags(sblock->fs_cstotal.cs_nbfree) + \ - sblock->fs_cstotal.cs_nffree - (sblock->fs_dsize * (percentreserved) / 100)) +#define freespace(fs, percentreserved) \ + (blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \ + (fs)->fs_cstotal.cs_nffree - ((fs)->fs_dsize * (percentreserved) / 100)) /* * Determining the size of a file block in the file system. */ -#define blksize(np, lbn) \ - (((lbn) >= NDADDR || (np)->allocsize >= ((lbn) + 1) << sblock->fs_bshift) \ - ? sblock->fs_bsize \ - : (fragroundup(blkoff((np)->allocsize)))) -#define dblksize(dip, lbn) \ - (((lbn) >= NDADDR || (dip)->di_size >= ((lbn) + 1) << sblock->fs_bshift) \ - ? sblock->fs_bsize \ - : (fragroundup(blkoff((dip)->di_size)))) +#define blksize(fs, ip, lbn) \ + (((lbn) >= NDADDR || (ip)->i_size >= ((lbn) + 1) << (fs)->fs_bshift) \ + ? (fs)->fs_bsize \ + : (fragroundup(fs, blkoff(fs, (ip)->i_size)))) +#define dblksize(fs, dip, lbn) \ + (((lbn) >= NDADDR || (dip)->di_size >= ((lbn) + 1) << (fs)->fs_bshift) \ + ? (fs)->fs_bsize \ + : (fragroundup(fs, blkoff(fs, (dip)->di_size)))) /* * Number of disk sectors per block; assumes DEV_BSIZE byte sector size. */ -#define NSPB (sblock->fs_nspf << sblock->fs_fragshift) -#define NSPF (sblock->fs_nspf) +#define NSPB(fs) ((fs)->fs_nspf << (fs)->fs_fragshift) +#define NSPF(fs) ((fs)->fs_nspf) /* * INOPB is the number of inodes in a secondary storage block. */ -#define INOPB (sblock->fs_inopb) -#define INOPF (sblock->fs_inopb >> sblock->fs_fragshift) +#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 (sblock->fs_nindir) +#define NINDIR(fs) ((fs)->fs_nindir) -#ifdef KERNEL -struct fs *getfs(); -#endif +extern int inside[], around[]; +extern u_char *fragtbl[]; |