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
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
#include <net-snmp/net-snmp-config.h> /* local SNMP configuration details */
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <sys/types.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/auto_nlist.h>
#include "util_funcs.h" /* utility function declarations */
#include "memory.h" /* the module-specific header */
#include "memory_solaris2.h" /* the module-specific header */
#include <kstat.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <unistd.h>
#define MAXSTRSIZE 80
int minimumswap;
static char errmsg[1024];
/****************************
* Kstat specific variables *
****************************/
extern kstat_ctl_t *kstat_fd; /* defined in kernel_sunos5.c */
kstat_t *ksp1, *ksp2;
kstat_named_t *kn, *kn2;
static FindVarMethod var_extensible_mem;
static long getFreeSwap(void);
static long getTotalFree(void);
static long getTotalSwap(void);
void
init_memory_solaris2(void)
{
struct variable2 extensible_mem_variables[] = {
{MIBINDEX, ASN_INTEGER, RONLY, var_extensible_mem, 1, {MIBINDEX}},
{ERRORNAME, ASN_OCTET_STR, RONLY, var_extensible_mem, 1,
{ERRORNAME}},
{MEMTOTALSWAP, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMTOTALSWAP}},
{MEMAVAILSWAP, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMAVAILSWAP}},
{MEMTOTALREAL, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMTOTALREAL}},
{MEMAVAILREAL, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMAVAILREAL}},
{MEMTOTALSWAPTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMTOTALSWAPTXT}},
{MEMUSEDSWAPTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMUSEDSWAPTXT}},
{MEMTOTALREALTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMTOTALREALTXT}},
{MEMUSEDREALTXT, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMUSEDREALTXT}},
{MEMTOTALFREE, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMTOTALFREE}},
{MEMSWAPMINIMUM, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMSWAPMINIMUM}},
{MEMSHARED, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMSHARED}},
{MEMBUFFER, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMBUFFER}},
{MEMCACHED, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{MEMCACHED}},
{ERRORFLAG, ASN_INTEGER, RONLY, var_extensible_mem, 1,
{ERRORFLAG}},
{ERRORMSG, ASN_OCTET_STR, RONLY, var_extensible_mem, 1, {ERRORMSG}}
};
/*
* Define the OID pointer to the top of the mib tree that we're
* registering underneath
*/
oid mem_variables_oid[] = { UCDAVIS_MIB, MEMMIBNUM };
/*
* register ourselves with the agent to handle our mib tree
*/
REGISTER_MIB("ucd-snmp/memory", extensible_mem_variables, variable2,
mem_variables_oid);
snmpd_register_config_handler("swap", memory_parse_config,
memory_free_config, "min-avail");
if (kstat_fd == 0) {
kstat_fd = kstat_open();
if (kstat_fd == 0) {
snmp_log_perror("kstat_open");
}
}
}
static u_char *
var_extensible_mem(struct variable *vp,
oid * name,
size_t * length,
int exact,
size_t * var_len, WriteMethod ** write_method)
{
static long long_ret;
/*
* Initialize the return value to 0
*/
long_ret = 0;
if (header_generic(vp, name, length, exact, var_len, write_method))
return (NULL);
switch (vp->magic) {
case MIBINDEX:
long_ret = 0;
return ((u_char *) (&long_ret));
case ERRORNAME: /* dummy name */
sprintf(errmsg, "swap");
*var_len = strlen(errmsg);
return ((u_char *) (errmsg));
case MEMTOTALSWAP:
long_ret = getTotalSwap() * (getpagesize() / 1024);
return ((u_char *) (&long_ret));
case MEMAVAILSWAP:
long_ret = getFreeSwap() * (getpagesize() / 1024);
return ((u_char *) (&long_ret));
case MEMSWAPMINIMUM:
long_ret = minimumswap;
return ((u_char *) (&long_ret));
case MEMTOTALREAL:
#ifdef _SC_PHYS_PAGES
long_ret = sysconf(_SC_PHYS_PAGES) * (getpagesize()/1024);
#else
ksp1 = kstat_lookup(kstat_fd, "unix", 0, "system_pages");
kstat_read(kstat_fd, ksp1, 0);
kn = kstat_data_lookup(ksp1, "physmem");
long_ret = kn->value.ul * (getpagesize() / 1024);
#endif
return ((u_char *) (&long_ret));
case MEMAVAILREAL:
#ifdef _SC_AVPHYS_PAGES
long_ret = sysconf(_SC_AVPHYS_PAGES) * (getpagesize()/1024);
#else
long_ret =
(getTotalFree() - getFreeSwap()) * (getpagesize() / 1024);
#endif
return ((u_char *) (&long_ret));
case MEMTOTALFREE:
long_ret = getTotalFree() * (getpagesize() / 1024);
return ((u_char *) (&long_ret));
case ERRORFLAG:
long_ret = getTotalFree() * (getpagesize() / 1024);
long_ret = (long_ret > minimumswap) ? 0 : 1;
return ((u_char *) (&long_ret));
case ERRORMSG:
long_ret = getTotalFree() * (getpagesize() / 1024);
if ((long_ret > minimumswap) ? 0 : 1)
sprintf(errmsg, "Running out of swap space (%ld)", long_ret);
else
errmsg[0] = 0;
*var_len = strlen(errmsg);
return ((u_char *) (errmsg));
}
return (NULL);
}
#define DEFAULTMINIMUMSWAP 16000 /* kilobytes */
void
memory_parse_config(const char *token, char *cptr)
{
minimumswap = atoi(cptr);
}
void
memory_free_config(void)
{
minimumswap = DEFAULTMINIMUMSWAP;
}
long
getTotalSwap(void)
{
long total_mem;
size_t num;
int i, n;
swaptbl_t *s;
char *strtab;
total_mem = 0;
num = swapctl(SC_GETNSWP, 0);
s = malloc(num * sizeof(swapent_t) + sizeof(struct swaptable));
if (s) {
strtab = (char *) malloc((num + 1) * MAXSTRSIZE);
if (strtab) {
for (i = 0; i < (num + 1); i++) {
s->swt_ent[i].ste_path = strtab + (i * MAXSTRSIZE);
}
s->swt_n = num + 1;
n = swapctl(SC_LIST, s);
for (i = 0; i < n; i++)
total_mem += s->swt_ent[i].ste_pages;
free(strtab);
}
free(s);
}
return (total_mem);
}
/*
* returns -1 if malloc fails.
*/
static long
getFreeSwap(void)
{
long free_mem = -1;
size_t num;
int i, n;
swaptbl_t *s;
char *strtab;
num = swapctl(SC_GETNSWP, 0);
s = malloc(num * sizeof(swapent_t) + sizeof(struct swaptable));
if (s) {
strtab = (char *) malloc((num + 1) * MAXSTRSIZE);
if (strtab) {
free_mem = 0;
for (i = 0; i < (num + 1); i++) {
s->swt_ent[i].ste_path = strtab + (i * MAXSTRSIZE);
}
s->swt_n = num + 1;
n = swapctl(SC_LIST, s);
for (i = 0; i < n; i++)
free_mem += s->swt_ent[i].ste_free;
free(strtab);
}
free(s);
}
return (free_mem);
}
static long
getTotalFree(void)
{
unsigned long free_mem, allocated, reserved, available, used_size;
struct anoninfo ai;
if (-1 == swapctl(SC_AINFO, &ai)) {
snmp_log_perror("swapctl(SC_AINFO)");
return 0;
}
allocated = ai.ani_max - ai.ani_free;
reserved = (ai.ani_resv - allocated);
available = (ai.ani_max - ai.ani_resv); /* K-byte */
free_mem = used_size = reserved + allocated;
free_mem = available;
return (free_mem);
}
|