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/*
* AIX4 memory statistics module for net-snmp
*
* Version 0.1 - Initial release - 05/Jun/2003
*
* Derived from memory_solaris2.c
* Using libperfstat for statistics (Redbook SG24-6039)
*
* Ported to AIX by Michael Kukat <michael.kukat@to.com>
* Thinking Objects Software GmbH
* Lilienthalstraße 2
* 70825 Stuttgart-Korntal
* http://www.to.com/
*
* Thanks go to Jochen Kmietsch for the solaris2 support and
* to DaimlerChrysler AG Stuttgart for making this port possible
*/
#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_aix4.h" /* the module-specific header */
#include <libperfstat.h>
#include <sys/stat.h>
#include <unistd.h>
#define MAXSTRSIZE 80
int minimumswap;
static char errmsg[1024];
static FindVarMethod var_extensible_mem;
static long getFreeSwap(void);
static long getTotalFree(void);
static long getTotalSwap(void);
static long getFreeReal(void);
static long getTotalReal(void);
void
init_memory_aix4(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[] = { NETSNMP_UCDAVIS_MIB, NETSNMP_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");
}
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:
long_ret = getTotalReal() * (getpagesize() / 1024);
return ((u_char *) (&long_ret));
case MEMAVAILREAL:
long_ret = getFreeReal() * (getpagesize() / 1024);
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;
}
static long
getTotalSwap(void)
{
long total_mem = -1;
perfstat_memory_total_t mem;
if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
total_mem = mem.pgsp_total;
}
return (total_mem);
}
static long
getFreeSwap(void)
{
long free_mem = -1;
perfstat_memory_total_t mem;
if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
free_mem = mem.pgsp_free;
}
return (free_mem);
}
static long
getTotalFree(void)
{
long free_mem = -1;
perfstat_memory_total_t mem;
if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
free_mem = mem.pgsp_free + mem.real_free;
}
return (free_mem);
}
static long
getTotalReal(void)
{
long total_mem = -1;
perfstat_memory_total_t mem;
if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
total_mem = mem.real_total;
}
return (total_mem);
}
static long
getFreeReal(void)
{
long free_mem = -1;
perfstat_memory_total_t mem;
if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
free_mem = mem.real_free;
}
return (free_mem);
}
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