memory_netbsd1.c
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:7k
- /*
- * memory_netbsd1.c
- */
- #include <net-snmp/net-snmp-config.h>
- /*
- * Ripped from /usr/scr/usr.bin/vmstat/vmstat.c (covering all bases)
- */
- #include <sys/param.h>
- #include <sys/time.h>
- #include <sys/proc.h>
- #include <sys/dkstat.h>
- #include <sys/buf.h>
- #include <sys/uio.h>
- #include <sys/namei.h>
- #include <sys/malloc.h>
- #include <sys/signal.h>
- #include <sys/fcntl.h>
- #include <sys/ioctl.h>
- #include <sys/sysctl.h>
- #include <sys/vmmeter.h>
-
- #if defined(HAVE_UVM_UVM_PARAM_H) && defined(HAVE_UVM_UVM_EXTERN_H)
- #include <uvm/uvm_param.h>
- #include <uvm/uvm_extern.h>
- #elif defined(HAVE_VM_VM_PARAM_H) && defined(HAVE_VM_VM_EXTERN_H)
- #include <vm/vm_param.h>
- #include <vm/vm_extern.h>
- #else
- #error memory_netbsd1.c: Is this really a NetBSD system?
- #endif
-
- #include <time.h>
- #include <nlist.h>
- #include <kvm.h>
- #include <errno.h>
- #include <unistd.h>
- #include <stdio.h>
- #include <ctype.h>
- #include <stdlib.h>
- #include <string.h>
- #include <paths.h>
- #include <limits.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"
- #include "memory.h"
- #include "memory_netbsd1.h"
- /*
- * Default swap warning limit (kb)
- */
- #define DEFAULTMINIMUMSWAP 16000
- /*
- * Swap warning limit
- */
- long minimumswap;
- /*
- * Swap info
- */
- quad_t swapTotal;
- quad_t swapUsed;
- quad_t swapFree;
- static FindVarMethod var_extensible_mem;
- void
- init_memory_netbsd1(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");
- }
- void
- memory_parse_config(const char *token, char *cptr)
- {
- minimumswap = atoi(cptr);
- }
- void
- memory_free_config(void)
- {
- minimumswap = DEFAULTMINIMUMSWAP;
- }
- /*
- * var_extensible_mem(...
- * Arguments:
- * vp IN - pointer to variable entry that points here
- * name IN/OUT - IN/name requested, OUT/name found
- * length IN/OUT - length of IN/OUT oid's
- * exact IN - TRUE if an exact match was requested
- * var_len OUT - length of variable or 0 if function returned
- * write_method
- *
- */
- static
- unsigned 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;
- static char errmsg[1024];
- static struct uvmexp uvmexp;
- int uvmexp_size = sizeof(uvmexp);
- int uvmexp_mib[] = { CTL_VM, VM_UVMEXP };
- static struct vmtotal total;
- size_t total_size = sizeof(total);
- int total_mib[] = { CTL_VM, VM_METER };
- long phys_mem;
- size_t phys_mem_size = sizeof(phys_mem);
- int phys_mem_mib[] = { CTL_HW, HW_USERMEM };
- if (header_generic(vp, name, length, exact, var_len, write_method))
- return (NULL);
- /*
- * Memory info
- */
- sysctl(uvmexp_mib, 2, &uvmexp, &uvmexp_size, NULL, 0);
- sysctl(total_mib, 2, &total, &total_size, NULL, 0);
- /*
- * Physical memory
- */
- sysctl(phys_mem_mib, 2, &phys_mem, &phys_mem_size, NULL, 0);
- long_ret = 0; /* set to 0 as default */
- /*
- * Page-to-kb macro
- */
- #define ptok(p) ((p) * (uvmexp.pagesize >> 10))
- 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 = ptok(uvmexp.swpages);
- return ((u_char *) (&long_ret));
- case MEMAVAILSWAP: /* FREE swap memory */
- long_ret = ptok(uvmexp.swpages - uvmexp.swpginuse);
- return ((u_char *) (&long_ret));
- case MEMTOTALREAL:
- long_ret = phys_mem >> 10;
- return ((u_char *) (&long_ret));
- case MEMAVAILREAL: /* FREE real memory */
- long_ret = ptok(uvmexp.free);
- return ((u_char *) (&long_ret));
- /*
- * these are not implemented
- */
- case MEMTOTALSWAPTXT:
- case MEMUSEDSWAPTXT:
- case MEMTOTALREALTXT:
- case MEMUSEDREALTXT:
- #if NO_DUMMY_VALUES
- return NULL;
- #endif
- long_ret = -1;
- return ((u_char *) (&long_ret));
- case MEMTOTALFREE:
- long_ret = ptok((int) total.t_free);
- return ((u_char *) (&long_ret));
- case MEMSWAPMINIMUM:
- long_ret = minimumswap;
- return ((u_char *) (&long_ret));
- case MEMSHARED:
- return ((u_char *) (&long_ret));
- case MEMBUFFER:
- return NULL;
- case MEMCACHED:
- return NULL;
- case ERRORFLAG:
- long_ret = (swapFree > minimumswap) ? 0 : 1;
- return ((u_char *) (&long_ret));
- case ERRORMSG:
- if (swapFree < minimumswap)
- sprintf(errmsg, "Running out of swap space (%qd)", swapFree);
- else
- errmsg[0] = 0;
- *var_len = strlen(errmsg);
- return ((u_char *) (errmsg));
- }
- return NULL;
- }