1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* $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
|
