255 lines
7.1 KiB
C
255 lines
7.1 KiB
C
/*
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* AIX4 memory statistics module for net-snmp
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*
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* Version 0.1 - Initial release - 05/Jun/2003
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*
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* Derived from memory_solaris2.c
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* Using libperfstat for statistics (Redbook SG24-6039)
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*
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* Ported to AIX by Michael Kukat <michael.kukat@to.com>
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* Thinking Objects Software GmbH
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* Lilienthalstraße 2
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* 70825 Stuttgart-Korntal
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* http://www.to.com/
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*
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* Thanks go to Jochen Kmietsch for the solaris2 support and
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* to DaimlerChrysler AG Stuttgart for making this port possible
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*/
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#include <net-snmp/net-snmp-config.h> /* local SNMP configuration details */
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <sys/types.h>
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#include <net-snmp/net-snmp-includes.h>
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#include <net-snmp/agent/net-snmp-agent-includes.h>
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#include <net-snmp/agent/auto_nlist.h>
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#include "util_funcs/header_generic.h" /* utility function declarations */
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#include "memory.h" /* the module-specific header */
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#include "memory_aix4.h" /* the module-specific header */
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#ifdef HAVE_SYS_PROTOSW_H
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#include <sys/protosw.h>
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#endif
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#include <libperfstat.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#define MAXSTRSIZE 80
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int minimumswap;
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static char errmsg[1024];
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static FindVarMethod var_extensible_mem;
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static long getFreeSwap(void);
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static long getTotalFree(void);
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static long getTotalSwap(void);
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static long getFreeReal(void);
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static long getTotalReal(void);
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void
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init_memory_aix4(void)
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{
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struct variable2 extensible_mem_variables[] = {
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{MIBINDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MIBINDEX}},
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{ERRORNAME, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {ERRORNAME}},
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{MEMTOTALSWAP, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMTOTALSWAP}},
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{MEMAVAILSWAP, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMAVAILSWAP}},
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{MEMTOTALREAL, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMTOTALREAL}},
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{MEMAVAILREAL, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMAVAILREAL}},
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{MEMTOTALSWAPTXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMTOTALSWAPTXT}},
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{MEMUSEDSWAPTXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMUSEDSWAPTXT}},
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{MEMTOTALREALTXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMTOTALREALTXT}},
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{MEMUSEDREALTXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMUSEDREALTXT}},
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{MEMTOTALFREE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMTOTALFREE}},
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{MEMSWAPMINIMUM, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMSWAPMINIMUM}},
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{MEMSHARED, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMSHARED}},
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{MEMBUFFER, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMBUFFER}},
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{MEMCACHED, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {MEMCACHED}},
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{ERRORFLAG, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {ERRORFLAG}},
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{ERRORMSG, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
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var_extensible_mem, 1, {ERRORMSG}}
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};
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/*
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* Define the OID pointer to the top of the mib tree that we're
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* registering underneath
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*/
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oid mem_variables_oid[] = { NETSNMP_UCDAVIS_MIB, NETSNMP_MEMMIBNUM };
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/*
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* register ourselves with the agent to handle our mib tree
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*/
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REGISTER_MIB("ucd-snmp/memory", extensible_mem_variables, variable2,
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mem_variables_oid);
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snmpd_register_config_handler("swap", memory_parse_config,
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memory_free_config, "min-avail");
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}
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static u_char *
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var_extensible_mem(struct variable *vp,
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oid * name,
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size_t * length,
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int exact,
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size_t * var_len, WriteMethod ** write_method)
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{
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static long long_ret;
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/*
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* Initialize the return value to 0
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*/
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long_ret = 0;
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if (header_generic(vp, name, length, exact, var_len, write_method))
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return (NULL);
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switch (vp->magic) {
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case MIBINDEX:
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long_ret = 0;
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return ((u_char *) (&long_ret));
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case ERRORNAME: /* dummy name */
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sprintf(errmsg, "swap");
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*var_len = strlen(errmsg);
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return ((u_char *) (errmsg));
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case MEMTOTALSWAP:
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long_ret = getTotalSwap() * (getpagesize() / 1024);
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return ((u_char *) (&long_ret));
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case MEMAVAILSWAP:
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long_ret = getFreeSwap() * (getpagesize() / 1024);
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return ((u_char *) (&long_ret));
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case MEMSWAPMINIMUM:
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long_ret = minimumswap;
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return ((u_char *) (&long_ret));
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case MEMTOTALREAL:
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long_ret = getTotalReal() * (getpagesize() / 1024);
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return ((u_char *) (&long_ret));
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case MEMAVAILREAL:
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long_ret = getFreeReal() * (getpagesize() / 1024);
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return ((u_char *) (&long_ret));
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case MEMTOTALFREE:
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long_ret = getTotalFree() * (getpagesize() / 1024);
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return ((u_char *) (&long_ret));
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case ERRORFLAG:
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long_ret = getTotalFree() * (getpagesize() / 1024);
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long_ret = (long_ret > minimumswap) ? 0 : 1;
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return ((u_char *) (&long_ret));
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case ERRORMSG:
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long_ret = getTotalFree() * (getpagesize() / 1024);
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if ((long_ret > minimumswap) ? 0 : 1)
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sprintf(errmsg, "Running out of swap space (%ld)", long_ret);
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else
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errmsg[0] = 0;
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*var_len = strlen(errmsg);
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return ((u_char *) (errmsg));
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}
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return (NULL);
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}
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#define DEFAULTMINIMUMSWAP 16000 /* kilobytes */
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void
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memory_parse_config(const char *token, char *cptr)
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{
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minimumswap = atoi(cptr);
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}
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void
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memory_free_config(void)
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{
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minimumswap = DEFAULTMINIMUMSWAP;
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}
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static long
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getTotalSwap(void)
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{
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long total_mem = -1;
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perfstat_memory_total_t mem;
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if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
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total_mem = mem.pgsp_total;
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}
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return (total_mem);
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}
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static long
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getFreeSwap(void)
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{
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long free_mem = -1;
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perfstat_memory_total_t mem;
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if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
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free_mem = mem.pgsp_free;
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}
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return (free_mem);
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}
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static long
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getTotalFree(void)
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{
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long free_mem = -1;
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perfstat_memory_total_t mem;
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if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
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free_mem = mem.pgsp_free + mem.real_free;
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}
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return (free_mem);
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}
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static long
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getTotalReal(void)
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{
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long total_mem = -1;
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perfstat_memory_total_t mem;
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if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
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total_mem = mem.real_total;
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}
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return (total_mem);
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}
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static long
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getFreeReal(void)
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{
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long free_mem = -1;
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perfstat_memory_total_t mem;
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if(perfstat_memory_total((perfstat_id_t *)NULL, &mem, sizeof(perfstat_memory_total_t), 1) >= 1) {
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free_mem = mem.real_free;
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}
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return (free_mem);
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}
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