/* $OpenBSD: clean.h,v 1.4 2002/02/17 19:42:26 millert Exp $ */ /*- * Copyright (c) 1992, 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. * * 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. * * @(#)clean.h 8.2 (Berkeley) 5/4/95 */ /* * The LFS user-level library will be used when writing cleaners and * checkers for LFS file systems. It will have facilities for finding * and parsing LFS segments. */ #define DUMP_SUM_HEADER 0x0001 #define DUMP_INODE_ADDRS 0x0002 #define DUMP_FINFOS 0x0004 #define DUMP_ALL 0xFFFF #define IFILE_NAME "ifile" /* * Cleaner parameters * BUSY_LIM: lower bound of the number of segments currently available * as a percentage of the total number of free segments possibly * available. * IDLE_LIM: Same as BUSY_LIM but used when the system is idle. * MIN_SEGS: Minimum number of segments you should always have. * I have no idea what this should be, but it should probably * be a function of lfsp. * NUM_TO_CLEAN: Number of segments to clean at once. Again, this * should probably be based on the file system size and how * full or empty the segments being cleaned are. */ #define BUSY_LIM 0.50 #define IDLE_LIM 0.90 #define MIN_SEGS(lfsp) (3) #define NUM_TO_CLEAN(fsp) (1) #define MAXLOADS 3 #define ONE_MIN 0 #define FIVE_MIN 1 #define FIFTEEN_MIN 2 typedef struct fs_info { struct statfs *fi_statfsp; /* fsstat info from getfsstat */ struct lfs fi_lfs; /* superblock */ CLEANERINFO *fi_cip; /* Cleaner info from ifile */ SEGUSE *fi_segusep; /* segment usage table (from ifile) */ IFILE *fi_ifilep; /* ifile table (from ifile) */ u_long fi_daddr_shift; /* shift to get byte offset of daddr */ u_long fi_ifile_count; /* # entries in the ifile table */ off_t fi_ifile_length; /* length of the ifile */ } FS_INFO; /* * XXX: size (in bytes) of a segment * should lfs_bsize be fsbtodb(fs,1), blksize(fs), or lfs_dsize? */ #define seg_size(fs) ((fs)->lfs_ssize << (fs)->lfs_bshift) /* daddr -> byte offset */ #define datobyte(fs, da) ((da) << (fs)->fi_daddr_shift) #define bytetoda(fs, byte) ((byte) >> (fs)->fi_daddr_shift) #define CLEANSIZE(fsp) (fsp->fi_lfs.lfs_cleansz << fsp->fi_lfs.lfs_bshift) #define SEGTABSIZE(fsp) (fsp->fi_lfs.lfs_segtabsz << fsp->fi_lfs.lfs_bshift) #define IFILE_ENTRY(fs, if, i) \ ((IFILE *)((caddr_t)(if) + ((i) / (fs)->lfs_ifpb << (fs)->lfs_bshift)) \ + (i) % (fs)->lfs_ifpb) #define SEGUSE_ENTRY(fs, su, i) \ ((SEGUSE *)((caddr_t)(su) + (fs)->lfs_bsize * ((i) / (fs)->lfs_sepb)) +\ (i) % (fs)->lfs_sepb) __BEGIN_DECLS int dump_summary(struct lfs *, SEGSUM *, u_long, daddr_t **); void err(const int, const char *, ...); int fs_getmntinfo(struct statfs **, char *, const char *); int get(int, off_t, void *, size_t); FS_INFO *get_fs_info(struct statfs *, int); int lfs_segmapv(FS_INFO *, int, caddr_t, BLOCK_INFO **, int *); int mmap_segment(FS_INFO *, int, caddr_t *, int); void munmap_segment(FS_INFO *, caddr_t, int); void reread_fs_info(FS_INFO *, int); void toss(void *, int *, size_t, int (*)(const void *, const void *, const void *), void *); /* * USEFUL DEBUGGING FUNCTIONS: */ #ifdef VERBOSE #define PRINT_FINFO(fp, ip) { \ (void)printf(" %s %s%d version %d nblocks %d\n", \ (ip)->if_version > (fp)->fi_version ? "TOSSING" : "KEEPING", \ "FINFO for inode: ", (fp)->fi_ino, \ (fp)->fi_version, (fp)->fi_nblocks); \ fflush(stdout); \ } #define PRINT_INODE(b, bip) { \ (void) printf("\t%s inode: %d daddr: 0x%lx create: %s\n", \ b ? "KEEPING" : "TOSSING", (bip)->bi_inode, (bip)->bi_daddr, \ ctime((time_t *)&(bip)->bi_segcreate)); \ fflush(stdout); \ } #define PRINT_BINFO(bip) { \ (void)printf("\tinode: %d lbn: %d daddr: 0x%lx create: %s\n", \ (bip)->bi_inode, (bip)->bi_lbn, (bip)->bi_daddr, \ ctime((time_t *)&(bip)->bi_segcreate)); \ fflush(stdout); \ } #define PRINT_SEGUSE(sup, n) { \ (void)printf("Segment %d nbytes=%lu\tflags=%c%c%c ninos=%d nsums=%d lastmod: %s\n", \ n, (sup)->su_nbytes, \ (sup)->su_flags & SEGUSE_DIRTY ? 'D' : 'C', \ (sup)->su_flags & SEGUSE_ACTIVE ? 'A' : ' ', \ (sup)->su_flags & SEGUSE_SUPERBLOCK ? 'S' : ' ', \ (sup)->su_ninos, (sup)->su_nsums, \ ctime((time_t *)&(sup)->su_lastmod)); \ fflush(stdout); \ } void dump_super(struct lfs *); void dump_cleaner_info(void *); void print_SEGSUM( struct lfs *, SEGSUM *); void print_CLEANERINFO(CLEANERINFO *); #else #define PRINT_FINFO(fp, ip) #define PRINT_INODE(b, bip) #define PRINT_BINFO(bip) #define PRINT_SEGUSE(sup, n) #define dump_cleaner_info(cip) #define dump_super(lfsp) #endif __END_DECLS