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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* $OpenBSD: swap.c,v 1.4 1996/06/26 05:40:11 deraadt Exp $ */
/* $NetBSD: swap.c,v 1.5 1996/05/10 23:16:38 thorpej Exp $ */
/*-
* Copyright (c) 1980, 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)swap.c 8.3 (Berkeley) 4/29/95";
#endif
static char rcsid[] = "$OpenBSD: swap.c,v 1.4 1996/06/26 05:40:11 deraadt Exp $";
#endif /* not lint */
/*
* swapinfo - based on a program of the same name by Kevin Lahey
*/
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/map.h>
#include <sys/stat.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "systat.h"
#include "extern.h"
extern char *getbsize __P((int *headerlenp, long *blocksizep));
void showspace __P((char *header, int hlen, long blocksize));
struct nlist syms[] = {
{ "_swapmap" }, /* list of free swap areas */
#define VM_SWAPMAP 0
{ "_nswapmap" },/* size of the swap map */
#define VM_NSWAPMAP 1
{ "_swdevt" }, /* list of swap devices and sizes */
#define VM_SWDEVT 2
{ "_nswap" }, /* size of largest swap device */
#define VM_NSWAP 3
{ "_nswdev" }, /* number of swap devices */
#define VM_NSWDEV 4
{ "_dmmax" }, /* maximum size of a swap block */
#define VM_DMMAX 5
0
};
static int nswap, nswdev, dmmax, nswapmap;
static struct swdevt *sw;
static long *perdev, blocksize;
static struct map *swapmap, *kswapmap;
static struct mapent *mp;
static int nfree, hlen;
#define SVAR(var) __STRING(var) /* to force expansion */
#define KGET(idx, var) \
KGET1(idx, &var, sizeof(var), SVAR(var))
#define KGET1(idx, p, s, msg) \
KGET2(syms[idx].n_value, p, s, msg)
#define KGET2(addr, p, s, msg) \
if (kvm_read(kd, addr, p, s) != s) { \
error("cannot read %s: %s", msg, kvm_geterr(kd)); \
return (0); \
}
WINDOW *
openswap()
{
return (subwin(stdscr, LINES-5-1, 0, 5, 0));
}
void
closeswap(w)
WINDOW *w;
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
initswap()
{
int i;
char msgbuf[BUFSIZ];
static int once = 0;
if (once)
return (1);
if (kvm_nlist(kd, syms)) {
strcpy(msgbuf, "systat: swap: cannot find");
for (i = 0; syms[i].n_name != NULL; i++) {
if (syms[i].n_value == 0) {
strcat(msgbuf, " ");
strcat(msgbuf, syms[i].n_name);
}
}
error(msgbuf);
return (0);
}
KGET(VM_NSWAP, nswap);
KGET(VM_NSWDEV, nswdev);
KGET(VM_DMMAX, dmmax);
KGET(VM_NSWAPMAP, nswapmap);
KGET(VM_SWAPMAP, kswapmap); /* kernel `swapmap' is a pointer */
if ((sw = malloc(nswdev * sizeof(*sw))) == NULL ||
(perdev = malloc(nswdev * sizeof(*perdev))) == NULL ||
(mp = malloc(nswapmap * sizeof(*mp))) == NULL) {
error("swap malloc");
return (0);
}
KGET1(VM_SWDEVT, sw, nswdev * sizeof(*sw), "swdevt");
once = 1;
return (1);
}
void
fetchswap()
{
int s, e, i;
s = nswapmap * sizeof(*mp);
if (kvm_read(kd, (long)kswapmap, mp, s) != s)
error("cannot read swapmap: %s", kvm_geterr(kd));
/* first entry in map is `struct map'; rest are mapent's */
swapmap = (struct map *)mp;
if (nswapmap != swapmap->m_limit - (struct mapent *)kswapmap)
error("panic: swap: nswapmap goof");
/*
* Count up swap space.
*/
nfree = 0;
bzero(perdev, nswdev * sizeof(*perdev));
for (mp++; mp->m_addr != 0; mp++) {
s = mp->m_addr; /* start of swap region */
e = mp->m_addr + mp->m_size; /* end of region */
nfree += mp->m_size;
/*
* Swap space is split up among the configured disks.
* The first dmmax blocks of swap space some from the
* first disk, the next dmmax blocks from the next,
* and so on. The list of free space joins adjacent
* free blocks, ignoring device boundries. If we want
* to keep track of this information per device, we'll
* just have to extract it ourselves.
*/
/* calculate first device on which this falls */
i = (s / dmmax) % nswdev;
while (s < e) { /* XXX this is inefficient */
int bound = roundup(s + 1, dmmax);
if (bound > e)
bound = e;
perdev[i] += bound - s;
if (++i >= nswdev)
i = 0;
s = bound;
}
}
}
void
labelswap()
{
char *header, *p;
int row, i;
row = 0;
wmove(wnd, row, 0); wclrtobot(wnd);
header = getbsize(&hlen, &blocksize);
mvwprintw(wnd, row++, 0, "%-5s%*s%9s %55s",
"Disk", hlen, header, "Used",
"/0% /10% /20% /30% /40% /50% /60% /70% /80% /90% /100%");
for (i = 0; i < nswdev; i++) {
p = devname(sw[i].sw_dev, S_IFBLK);
mvwprintw(wnd, i + 1, 0, "%-5s", p == NULL ? "??" : p);
}
}
void
showswap()
{
int col, row, div, i, j, avail, npfree, used, xsize, xfree;
div = blocksize / 512;
avail = npfree = 0;
for (i = 0; i < nswdev; i++) {
col = 5;
mvwprintw(wnd, i + 1, col, "%*d", hlen, sw[i].sw_nblks / div);
col += hlen;
/*
* Don't report statistics for partitions which have not
* yet been activated via swapon(8).
*/
if (!sw[i].sw_freed) {
mvwprintw(wnd, i + 1, col + 8,
"0 *** not available for swapping ***");
continue;
}
xsize = sw[i].sw_nblks;
xfree = perdev[i];
used = xsize - xfree;
mvwprintw(wnd, i + 1, col, "%9d ", used / div);
for (j = (100 * used / xsize + 1) / 2; j > 0; j--)
waddch(wnd, 'X');
npfree++;
avail += xsize;
}
/*
* If only one partition has been set up via swapon(8), we don't
* need to bother with totals.
*/
if (npfree > 1) {
used = avail - nfree;
mvwprintw(wnd, i + 1, 0, "%-5s%*d%9d ",
"Total", hlen, avail / div, used / div);
for (j = (100 * used / avail + 1) / 2; j > 0; j--)
waddch(wnd, 'X');
}
}
|
