163 lines
6.3 KiB
C
163 lines
6.3 KiB
C
/* $NetBSD: clean.h,v 1.10 2001/02/04 22:12:47 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)clean.h 8.2 (Berkeley) 5/4/95
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*/
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/*
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* The LFS user-level library will be used when writing cleaners and
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* checkers for LFS file systems. It will have facilities for finding
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* and parsing LFS segments.
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*/
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#define DUMP_SUM_HEADER 0x0001
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#define DUMP_INODE_ADDRS 0x0002
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#define DUMP_FINFOS 0x0004
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#define DUMP_ALL 0xFFFF
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#define IFILE_NAME "ifile"
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/*
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* Cleaner parameters
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* BUSY_LIM: lower bound of the number of segments currently available
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* as a percentage of the total number of free segments possibly
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* available.
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* IDLE_LIM: Same as BUSY_LIM but used when the system is idle.
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* MIN_SEGS: Minimum number of segments you should always have.
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* I have no idea what this should be, but it should probably
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* be a function of lfsp.
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* NUM_TO_CLEAN: Number of segments to clean at once. Again, this
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* should probably be based on the file system size and how
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* full or empty the segments being cleaned are.
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*/
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#define BUSY_LIM 0.50
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#define IDLE_LIM 0.90
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#define MIN_SEGS(lfsp) (3)
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#define NUM_TO_CLEAN(fsp) (1)
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#define MAXLOADS 3
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#define ONE_MIN 0
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#define FIVE_MIN 1
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#define FIFTEEN_MIN 2
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#define TIME_THRESHOLD 5 /* Time to tell looping from running */
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#define LOOP_THRESHOLD 5 /* Number of looping respawns before exit */
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#include <sys/time.h>
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typedef struct fs_info {
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struct statfs *fi_statfsp; /* fsstat info from getfsstat */
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struct lfs fi_lfs; /* superblock */
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CLEANERINFO *fi_cip; /* Cleaner info from ifile */
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SEGUSE *fi_segusep; /* segment usage table (from ifile) */
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IFILE *fi_ifilep; /* ifile table (from ifile) */
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u_long fi_daddr_shift; /* shift to get byte offset of daddr */
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u_long fi_ifile_count; /* # entries in the ifile table */
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off_t fi_ifile_length; /* length of the ifile */
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time_t fi_fs_tstamp; /* last fs activity, per ifile */
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} FS_INFO;
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/*
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* XXX: size (in bytes) of a segment
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* should lfs_bsize be fsbtodb(fs,1), blksize(fs), or lfs_dsize?
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*/
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#define seg_size(fs) ((fs)->lfs_ssize << (fs)->lfs_bshift)
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/* daddr -> byte offset */
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#define datobyte(fs, da) (((off_t)(da)) << (fs)->fi_daddr_shift)
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#define bytetoda(fs, byte) ((byte) >> (fs)->fi_daddr_shift)
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#define CLEANSIZE(fsp) (fsp->fi_lfs.lfs_cleansz << fsp->fi_lfs.lfs_bshift)
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#define SEGTABSIZE(fsp) (fsp->fi_lfs.lfs_segtabsz << fsp->fi_lfs.lfs_bshift)
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#define IFILE_ENTRY(fs, if, i) \
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((IFILE *)((caddr_t)(if) + ((i) / (fs)->lfs_ifpb << (fs)->lfs_bshift)) \
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+ (i) % (fs)->lfs_ifpb)
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#define SEGUSE_ENTRY(fs, su, i) \
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((SEGUSE *)((caddr_t)(su) + (fs)->lfs_bsize * ((i) / (fs)->lfs_sepb)) +\
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(i) % (fs)->lfs_sepb)
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__BEGIN_DECLS
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int dump_summary __P((struct lfs *, SEGSUM *, u_long, daddr_t **, daddr_t));
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int fs_getmntinfo __P((struct statfs **, char *, const char *));
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void get __P((int, off_t, void *, size_t));
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FS_INFO *get_fs_info __P((struct statfs *, int));
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int lfs_segmapv __P((FS_INFO *, int, caddr_t, BLOCK_INFO **, int *));
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int mmap_segment __P((FS_INFO *, int, caddr_t *, int));
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void munmap_segment __P((FS_INFO *, caddr_t, int));
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void reread_fs_info __P((FS_INFO *, int));
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void toss __P((void *, int *, size_t,
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int (*)(const void *, const void *, const void *), void *));
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/*
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* USEFUL DEBUGGING FUNCTIONS:
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*/
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#define PRINT_FINFO(fp, ip) if(debug > 1) { \
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syslog(LOG_DEBUG," %s %s%d version %d nblocks %d\n", \
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(ip)->if_version > (fp)->fi_version ? "TOSSING" : "KEEPING", \
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"FINFO for inode: ", (fp)->fi_ino, \
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(fp)->fi_version, (fp)->fi_nblocks); \
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}
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#define PRINT_INODE(b, bip) if(debug > 1) { \
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syslog(LOG_DEBUG,"\t%s inode: %d daddr: 0x%lx create: %s\n", \
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b ? "KEEPING" : "TOSSING", (bip)->bi_inode, (long)(bip)->bi_daddr, \
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ctime((time_t *)&(bip)->bi_segcreate)); \
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}
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#define PRINT_BINFO(bip) if(debug > 1 ) { \
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syslog(LOG_DEBUG,"\tinode: %d lbn: %d daddr: 0x%lx create: %s\n", \
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(bip)->bi_inode, (bip)->bi_lbn, (unsigned long)(bip)->bi_daddr, \
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ctime((time_t *)&(bip)->bi_segcreate)); \
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}
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#define PRINT_SEGUSE(sup, n) if(debug > 1) { \
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syslog(LOG_DEBUG,"Segment %d nbytes=%lu\tflags=%c%c%c ninos=%d nsums=%d lastmod: %s", \
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n, (unsigned long)(sup)->su_nbytes, \
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(sup)->su_flags & SEGUSE_DIRTY ? 'D' : 'C', \
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(sup)->su_flags & SEGUSE_ACTIVE ? 'A' : ' ', \
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(sup)->su_flags & SEGUSE_SUPERBLOCK ? 'S' : ' ', \
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(sup)->su_ninos, (sup)->su_nsums, \
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ctime((time_t *)&(sup)->su_lastmod)); \
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}
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void dump_super __P((struct lfs *));
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void dump_cleaner_info __P((void *));
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void print_SEGSUM __P(( struct lfs *, SEGSUM *, daddr_t));
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void print_CLEANERINFO __P((CLEANERINFO *));
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__END_DECLS
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