memory_aix4.c
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:7k
- /*
- * 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
- * Lilienthalstra遝 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>
- #if HAVE_DMALLOC_H
- #include <dmalloc.h>
- #endif
- #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[] = { 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");
- }
- 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);
- }