4.4BSD/usr/src/libexec/lfs_cleanerd/clean.h
/*-
* 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 8.1 (Berkeley) 6/4/93
*/
/*
* 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 __P((struct lfs *, SEGSUM *, u_long, daddr_t **));
void err __P((const int, const char *, ...));
int fs_getmntinfo __P((struct statfs **, char *, int));
int get __P((int, off_t, void *, size_t));
FS_INFO *get_fs_info __P((struct statfs *, int));
int lfs_segmapv __P((FS_INFO *, int, caddr_t, BLOCK_INFO **, int *));
int mmap_segment __P((FS_INFO *, int, caddr_t *, int));
void munmap_segment __P((FS_INFO *, caddr_t, int));
void reread_fs_info __P((FS_INFO *, int));
void toss __P((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 __P((struct lfs *));
void dump_cleaner_info __P((void *));
void print_SEGSUM __P(( struct lfs *, SEGSUM *));
void print_CLEANERINFO __P((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