| fs.h (74548) | fs.h (75377) |
|---|---|
| 1/* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)fs.h 8.13 (Berkeley) 3/21/95 | 1/* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)fs.h 8.13 (Berkeley) 3/21/95 |
| 34 * $FreeBSD: head/sys/ufs/ffs/fs.h 74548 2001-03-21 04:09:01Z mckusick $ | 34 * $FreeBSD: head/sys/ufs/ffs/fs.h 75377 2001-04-10 08:38:59Z mckusick $ |
| 35 */ 36 37#ifndef _UFS_FFS_FS_H_ 38#define _UFS_FFS_FS_H_ 39 40/* 41 * Each disk drive contains some number of file systems. 42 * A file system consists of a number of cylinder groups. --- 60 unchanged lines hidden (view full) --- 103 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in 104 * the super block for this name. 105 */ 106#define MAXMNTLEN 512 107 108/* 109 * There is a 128-byte region in the superblock reserved for in-core 110 * pointers to summary information. Originally this included an array | 35 */ 36 37#ifndef _UFS_FFS_FS_H_ 38#define _UFS_FFS_FS_H_ 39 40/* 41 * Each disk drive contains some number of file systems. 42 * A file system consists of a number of cylinder groups. --- 60 unchanged lines hidden (view full) --- 103 * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in 104 * the super block for this name. 105 */ 106#define MAXMNTLEN 512 107 108/* 109 * There is a 128-byte region in the superblock reserved for in-core 110 * pointers to summary information. Originally this included an array |
| 111 * of pointers to blocks of struct csum; now there are just two | 111 * of pointers to blocks of struct csum; now there are just three |
| 112 * pointers and the remaining space is padded with fs_ocsp[]. 113 * 114 * NOCSPTRS determines the size of this padding. One pointer (fs_csp) 115 * is taken away to point to a contiguous array of struct csum for 116 * all cylinder groups; a second (fs_maxcluster) points to an array | 112 * pointers and the remaining space is padded with fs_ocsp[]. 113 * 114 * NOCSPTRS determines the size of this padding. One pointer (fs_csp) 115 * is taken away to point to a contiguous array of struct csum for 116 * all cylinder groups; a second (fs_maxcluster) points to an array |
| 117 * of cluster sizes that is computed as cylinder groups are inspected. | 117 * of cluster sizes that is computed as cylinder groups are inspected, 118 * and the third points to an array that tracks the creation of new 119 * directories. |
| 118 */ | 120 */ |
| 119#define NOCSPTRS ((128 / sizeof(void *)) - 2) | 121#define NOCSPTRS ((128 / sizeof(void *)) - 3) |
| 120 121/* 122 * A summary of contiguous blocks of various sizes is maintained 123 * in each cylinder group. Normally this is set by the initial 124 * value of fs_maxcontig. To conserve space, a maximum summary size 125 * is set by FS_MAXCONTIG. 126 */ 127#define FS_MAXCONTIG 16 --- 9 unchanged lines hidden (view full) --- 137 * performance, 10% is a better choice. hence we use 10% as our 138 * default value. With 10% free space, fragmentation is not a 139 * problem, so we choose to optimize for time. 140 */ 141#define MINFREE 8 142#define DEFAULTOPT FS_OPTTIME 143 144/* | 122 123/* 124 * A summary of contiguous blocks of various sizes is maintained 125 * in each cylinder group. Normally this is set by the initial 126 * value of fs_maxcontig. To conserve space, a maximum summary size 127 * is set by FS_MAXCONTIG. 128 */ 129#define FS_MAXCONTIG 16 --- 9 unchanged lines hidden (view full) --- 139 * performance, 10% is a better choice. hence we use 10% as our 140 * default value. With 10% free space, fragmentation is not a 141 * problem, so we choose to optimize for time. 142 */ 143#define MINFREE 8 144#define DEFAULTOPT FS_OPTTIME 145 146/* |
| 147 * Grigoriy Orlov <gluk@ptci.ru> has done some extensive work to fine 148 * tune the layout preferences for directories within a filesystem. 149 * His algorithm can be tuned by adjusting the following parameters 150 * which tell the system the average file size and the average number 151 * of files per directory. These defaults are well selected for typical 152 * filesystems, but may need to be tuned for odd cases like filesystems 153 * being used for sqiud caches or news spools. 154 */ 155#define AVFILESIZ 16384 /* expected average file size */ 156#define AFPDIR 64 /* expected number of files per directory */ 157 158/* |
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| 145 * The maximum number of snapshot nodes that can be associated 146 * with each filesystem. This limit affects only the number of 147 * snapshot files that can be recorded within the superblock so 148 * that they can be found when the filesystem is mounted. However, 149 * maintaining too many will slow the filesystem performance, so 150 * having this limit is a good idea. 151 */ 152#define FSMAXSNAP 20 --- 115 unchanged lines hidden (view full) --- 268 int8_t fs_fmod; /* super block modified flag */ 269 int8_t fs_clean; /* file system is clean flag */ 270 int8_t fs_ronly; /* mounted read-only flag */ 271 int8_t fs_flags; /* see FS_ flags below */ 272 u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ 273/* these fields retain the current block allocation info */ 274 int32_t fs_cgrotor; /* last cg searched */ 275 void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ | 159 * The maximum number of snapshot nodes that can be associated 160 * with each filesystem. This limit affects only the number of 161 * snapshot files that can be recorded within the superblock so 162 * that they can be found when the filesystem is mounted. However, 163 * maintaining too many will slow the filesystem performance, so 164 * having this limit is a good idea. 165 */ 166#define FSMAXSNAP 20 --- 115 unchanged lines hidden (view full) --- 282 int8_t fs_fmod; /* super block modified flag */ 283 int8_t fs_clean; /* file system is clean flag */ 284 int8_t fs_ronly; /* mounted read-only flag */ 285 int8_t fs_flags; /* see FS_ flags below */ 286 u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ 287/* these fields retain the current block allocation info */ 288 int32_t fs_cgrotor; /* last cg searched */ 289 void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ |
| 290 u_int8_t *fs_contigdirs; /* # of contiguously allocated dirs */ |
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| 276 struct csum *fs_csp; /* cg summary info buffer for fs_cs */ 277 int32_t *fs_maxcluster; /* max cluster in each cyl group */ 278 int32_t fs_cpc; /* cyl per cycle in postbl */ 279 int16_t fs_opostbl[16][8]; /* old rotation block list head */ 280 int32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ | 291 struct csum *fs_csp; /* cg summary info buffer for fs_cs */ 292 int32_t *fs_maxcluster; /* max cluster in each cyl group */ 293 int32_t fs_cpc; /* cyl per cycle in postbl */ 294 int16_t fs_opostbl[16][8]; /* old rotation block list head */ 295 int32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ |
| 281 int32_t fs_sparecon[30]; /* reserved for future constants */ | 296 int32_t fs_avgfilesize; /* expected average file size */ 297 int32_t fs_avgfpdir; /* expected # of files per directory */ 298 int32_t fs_sparecon[28]; /* reserved for future constants */ |
| 282 int32_t fs_contigsumsize; /* size of cluster summary array */ 283 int32_t fs_maxsymlinklen; /* max length of an internal symlink */ 284 int32_t fs_inodefmt; /* format of on-disk inodes */ 285 u_int64_t fs_maxfilesize; /* maximum representable file size */ 286 int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */ 287 int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */ 288 int32_t fs_state; /* validate fs_clean field */ 289 int32_t fs_postblformat; /* format of positional layout tables */ --- 280 unchanged lines hidden --- | 299 int32_t fs_contigsumsize; /* size of cluster summary array */ 300 int32_t fs_maxsymlinklen; /* max length of an internal symlink */ 301 int32_t fs_inodefmt; /* format of on-disk inodes */ 302 u_int64_t fs_maxfilesize; /* maximum representable file size */ 303 int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */ 304 int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */ 305 int32_t fs_state; /* validate fs_clean field */ 306 int32_t fs_postblformat; /* format of positional layout tables */ --- 280 unchanged lines hidden --- |