diff options
Diffstat (limited to 'sys/ufs/ffs/fs.h')
| -rw-r--r-- | sys/ufs/ffs/fs.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/sys/ufs/ffs/fs.h b/sys/ufs/ffs/fs.h index e8e9f0bf3c1..2d8ed8abdc0 100644 --- a/sys/ufs/ffs/fs.h +++ b/sys/ufs/ffs/fs.h @@ -1,4 +1,4 @@ -/* $OpenBSD: fs.h,v 1.11 2001/04/13 02:39:04 gluk Exp $ */ +/* $OpenBSD: fs.h,v 1.12 2001/04/19 16:22:16 gluk Exp $ */ /* $NetBSD: fs.h,v 1.6 1995/04/12 21:21:02 mycroft Exp $ */ /* @@ -117,7 +117,7 @@ * and the third points to an array that tracks the creation of new * directories. */ -#define NOCSPTRS ((128 / sizeof(void *)) - 2) +#define NOCSPTRS ((128 / sizeof(void *)) - 3) /* * A summary of contiguous blocks of various sizes is maintained @@ -143,6 +143,16 @@ #define DEFAULTOPT FS_OPTTIME /* + * The directory preference algorithm(dirpref) can be tuned by adjusting + * the following parameters which tell the system the average file size + * and the average number of files per directory. These defaults are well + * selected for typical filesystems, but may need to be tuned for odd + * cases like filesystems being used for sqiud caches or news spools. + */ +#define AVFILESIZ 16384 /* expected average file size */ +#define AFPDIR 64 /* expected number of files per directory */ + +/* * 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 @@ -228,19 +238,15 @@ struct fs { /* these fields retain the current block allocation info */ int32_t fs_cgrotor; /* last cg searched */ void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ + u_int8_t *fs_contigdirs; /* # of contiguously allocated dirs */ struct csum *fs_csp; /* cg summary info buffer for fs_cs */ int32_t *fs_maxcluster; /* max cluster in each cyl group */ int32_t fs_cpc; /* cyl per cycle in postbl */ int16_t fs_opostbl[16][8]; /* old rotation block list head */ -#if LONG_BIT == 64 - int32_t fs_sparecon[45]; /* reserved for future constants */ -#else - int32_t fs_sparecon[46]; /* reserved for future constants */ -#endif -/* these fields used in dirpref routine for optimization */ - u_int8_t *fs_contigdirs; /* # of contiguously allocated dirs */ + int32_t fs_snapinum[20]; /* reserved for snapshot inode nums */ int32_t fs_avgfilesize; /* expected average file size */ int32_t fs_avgfpdir; /* expected # of files per directory */ + int32_t fs_sparecon[27]; /* reserved for future constants */ time_t fs_fscktime; /* last time fsck(8)ed */ int32_t fs_contigsumsize; /* size of cluster summary array */ int32_t fs_maxsymlinklen; /* max length of an internal symlink */ |