401 lines
11 KiB
C
401 lines
11 KiB
C
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/*
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* vmstat_freebsd2.c
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*/
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#include <net-snmp/net-snmp-config.h>
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/*
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* Ripped from /usr/scr/usr.bin/vmstat/vmstat.c (covering all bases)
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*/
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#include <sys/param.h>
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#include <sys/time.h>
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#if defined(dragonfly)
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#include <sys/user.h>
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#else
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#include <sys/proc.h>
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#endif
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#if defined(freebsd5) && __FreeBSD_version >= 500101
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#include <sys/resource.h>
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#elif defined(dragonfly)
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#include <kinfo.h>
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#else
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#include <sys/dkstat.h>
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#endif
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#ifdef freebsd5
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#include <sys/bio.h>
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#endif
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/namei.h>
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#include <sys/malloc.h>
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#include <sys/signal.h>
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#include <sys/fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <sys/vmmeter.h>
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#if HAVE_SYS_VMPARAM_H
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#include <sys/vmparam.h>
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#else
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#include <vm/vm_param.h>
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#endif
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#include <time.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <paths.h>
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#include <limits.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"
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#include "vmstat.h"
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#include "vmstat_freebsd2.h"
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/*
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* nlist symbols
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*/
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#define CPTIME_SYMBOL "cp_time"
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#define SUM_SYMBOL "cnt"
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#define INTRCNT_SYMBOL "intrcnt"
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#define EINTRCNT_SYMBOL "eintrcnt"
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#define BOOTTIME_SYMBOL "boottime"
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/*
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* Number of interrupts
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*/
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#define INT_COUNT 10
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/*
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* CPU percentage
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*/
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#define CPU_PRC 100
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FindVarMethod var_extensible_vmstat;
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void
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init_vmstat_freebsd2(void)
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{
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struct variable2 extensible_vmstat_variables[] = {
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{MIBINDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {MIBINDEX}},
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{ERRORNAME, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {ERRORNAME}},
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{SWAPIN, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SWAPIN}},
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{SWAPOUT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SWAPOUT}},
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{IOSENT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {IOSENT}},
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{IORECEIVE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {IORECEIVE}},
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{SYSINTERRUPTS, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SYSINTERRUPTS}},
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{SYSCONTEXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SYSCONTEXT}},
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{CPUUSER, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPUUSER}},
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{CPUSYSTEM, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPUSYSTEM}},
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{CPUIDLE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPUIDLE}},
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{CPURAWUSER, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWUSER}},
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{CPURAWNICE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWNICE}},
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{CPURAWSYSTEM, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWSYSTEM}},
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{CPURAWIDLE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWIDLE}},
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{CPURAWKERNEL, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWKERNEL}},
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{CPURAWINTR, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {CPURAWINTR}},
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{SYSRAWINTERRUPTS, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SYSRAWINTERRUPTS}},
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{SYSRAWCONTEXT, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
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var_extensible_vmstat, 1, {SYSRAWCONTEXT}},
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/*
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* Future use:
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*/
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/*
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* {ERRORFLAG, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
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* var_extensible_vmstat, 1, {ERRORFLAG }},
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* {ERRORMSG, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
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* var_extensible_vmstat, 1, {ERRORMSG }}
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*/
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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 vmstat_variables_oid[] = { NETSNMP_UCDAVIS_MIB, 11 };
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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/vmstat", extensible_vmstat_variables, variable2,
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vmstat_variables_oid);
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}
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long
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getuptime(void)
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{
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static time_t now, boottime;
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time_t uptime;
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if (boottime == 0)
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auto_nlist(BOOTTIME_SYMBOL, (char *) &boottime, sizeof(boottime));
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time(&now);
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uptime = now - boottime;
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return (uptime);
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}
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unsigned char *
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var_extensible_vmstat(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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int loop;
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time_t time_new = getuptime();
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static time_t time_old;
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static time_t time_diff;
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#if defined(dragonfly)
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static struct kinfo_cputime cpu_old, cpu_new, cpu_diff;
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static uint64_t cpu_total;
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uint64_t cpu_sum;
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static int pagesize;
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#else
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static long cpu_old[CPUSTATES];
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static long cpu_new[CPUSTATES];
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static long cpu_diff[CPUSTATES];
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static long cpu_total;
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long cpu_sum;
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#endif
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double cpu_prc;
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static struct vmmeter mem_old, mem_new;
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static long long_ret;
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static char errmsg[300];
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#if defined(dragonfly)
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if (pagesize == 0)
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pagesize = getpagesize() >> 10;
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#endif
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long_ret = 0; /* set to 0 as default */
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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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/*
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* Update structures (only if time has passed)
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*/
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if (time_new != time_old) {
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time_diff = time_new - time_old;
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time_old = time_new;
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/*
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* CPU usage
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*/
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cpu_total = 0;
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#if defined(dragonfly)
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kinfo_get_sched_cputime(&cpu_new);
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#define CP_UPDATE(field) cpu_diff.field = cpu_new.field - cpu_old.field; cpu_total += cpu_diff.field;
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CP_UPDATE(cp_user);
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CP_UPDATE(cp_nice);
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CP_UPDATE(cp_sys);
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CP_UPDATE(cp_intr);
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CP_UPDATE(cp_idle);
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cpu_old = cpu_new;
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#undef CP_UPDATE
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#else
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auto_nlist(CPTIME_SYMBOL, (char *) cpu_new, sizeof(cpu_new));
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for (loop = 0; loop < CPUSTATES; loop++) {
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cpu_diff[loop] = cpu_new[loop] - cpu_old[loop];
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cpu_old[loop] = cpu_new[loop];
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cpu_total += cpu_diff[loop];
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}
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#endif
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if (cpu_total == 0)
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cpu_total = 1;
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/*
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* Memory info
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*/
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mem_old = mem_new;
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auto_nlist(SUM_SYMBOL, (char *) &mem_new, sizeof(mem_new));
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}
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/*
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* Rate macro
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*/
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#define rate(x) (((x)+ time_diff/2) / time_diff)
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/*
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* Page-to-kb macro
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*/
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#if defined(dragonfly)
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#define ptok(p) ((p) * pagesize)
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#else
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#define ptok(p) ((p) * (mem_new.v_page_size >> 10))
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#endif
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switch (vp->magic) {
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case MIBINDEX:
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long_ret = 1;
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return ((u_char *) (&long_ret));
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case ERRORNAME: /* dummy name */
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sprintf(errmsg, "systemStats");
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*var_len = strlen(errmsg);
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return ((u_char *) (errmsg));
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case SWAPIN:
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#if defined(openbsd2) || defined(darwin)
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long_ret = ptok(mem_new.v_swpin - mem_old.v_swpin);
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#else
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long_ret = ptok(mem_new.v_swappgsin - mem_old.v_swappgsin +
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mem_new.v_vnodepgsin - mem_old.v_vnodepgsin);
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#endif
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long_ret = rate(long_ret);
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return ((u_char *) (&long_ret));
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case SWAPOUT:
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#if defined(openbsd2) || defined(darwin)
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long_ret = ptok(mem_new.v_swpout - mem_old.v_swpout);
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#else
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long_ret = ptok(mem_new.v_swappgsout - mem_old.v_swappgsout +
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mem_new.v_vnodepgsout - mem_old.v_vnodepgsout);
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#endif
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long_ret = rate(long_ret);
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return ((u_char *) (&long_ret));
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case IOSENT:
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#if NETSNMP_NO_DUMMY_VALUES
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return NULL;
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#endif
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long_ret = -1;
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return ((u_char *) (&long_ret));
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case IORECEIVE:
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#if NETSNMP_NO_DUMMY_VALUES
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return NULL;
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#endif
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long_ret = -1;
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return ((u_char *) (&long_ret));
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case SYSINTERRUPTS:
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long_ret = rate(mem_new.v_intr - mem_old.v_intr);
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return ((u_char *) (&long_ret));
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case SYSCONTEXT:
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long_ret = rate(mem_new.v_swtch - mem_old.v_swtch);
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return ((u_char *) (&long_ret));
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case CPUUSER:
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#if defined(dragonfly)
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cpu_sum = cpu_diff.cp_user + cpu_diff.cp_nice;
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#else
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cpu_sum = cpu_diff[CP_USER] + cpu_diff[CP_NICE];
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#endif
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cpu_prc = (float) cpu_sum / (float) cpu_total;
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long_ret = cpu_prc * CPU_PRC;
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return ((u_char *) (&long_ret));
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case CPUSYSTEM:
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#if defined(dragonfly)
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cpu_sum = cpu_diff.cp_sys + cpu_diff.cp_intr;
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#else
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cpu_sum = cpu_diff[CP_SYS] + cpu_diff[CP_INTR];
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#endif
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cpu_prc = (float) cpu_sum / (float) cpu_total;
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long_ret = cpu_prc * CPU_PRC;
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return ((u_char *) (&long_ret));
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case CPUIDLE:
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#if defined(dragonfly)
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cpu_sum = cpu_diff.cp_idle;
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#else
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cpu_sum = cpu_diff[CP_IDLE];
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#endif
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cpu_prc = (float) cpu_sum / (float) cpu_total;
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long_ret = cpu_prc * CPU_PRC;
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return ((u_char *) (&long_ret));
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case CPURAWUSER:
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#if defined(dragonfly)
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long_ret = cpu_new.cp_user;
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#else
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long_ret = cpu_new[CP_USER];
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#endif
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return ((u_char *) (&long_ret));
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case CPURAWNICE:
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#if defined(dragonfly)
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long_ret = cpu_new.cp_nice;
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#else
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long_ret = cpu_new[CP_NICE];
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#endif
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return ((u_char *) (&long_ret));
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case CPURAWSYSTEM:
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#if defined(dragonfly)
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long_ret = cpu_new.cp_sys + cpu_new.cp_nice;
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#else
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long_ret = cpu_new[CP_SYS] + cpu_new[CP_INTR];
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#endif
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return ((u_char *) (&long_ret));
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case CPURAWIDLE:
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|
|
#if defined(dragonfly)
|
||
|
|
long_ret = cpu_new.cp_idle;
|
||
|
|
#else
|
||
|
|
long_ret = cpu_new[CP_IDLE];
|
||
|
|
#endif
|
||
|
|
return ((u_char *) (&long_ret));
|
||
|
|
case CPURAWKERNEL:
|
||
|
|
#if defined(dragonfly)
|
||
|
|
long_ret = cpu_new.cp_sys;
|
||
|
|
#else
|
||
|
|
long_ret = cpu_new[CP_SYS];
|
||
|
|
#endif
|
||
|
|
return ((u_char *) (&long_ret));
|
||
|
|
case CPURAWINTR:
|
||
|
|
#if defined(dragonfly)
|
||
|
|
long_ret = cpu_new.cp_intr;
|
||
|
|
#else
|
||
|
|
long_ret = cpu_new[CP_INTR];
|
||
|
|
#endif
|
||
|
|
return ((u_char *) (&long_ret));
|
||
|
|
case SYSRAWINTERRUPTS:
|
||
|
|
long_ret = mem_new.v_intr;
|
||
|
|
return ((u_char *) (&long_ret));
|
||
|
|
case SYSRAWCONTEXT:
|
||
|
|
long_ret = mem_new.v_swtch;
|
||
|
|
return ((u_char *) (&long_ret));
|
||
|
|
/*
|
||
|
|
* reserved for future use
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* case ERRORFLAG:
|
||
|
|
* return((u_char *) (&long_ret));
|
||
|
|
* case ERRORMSG:
|
||
|
|
* return((u_char *) (&long_ret));
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|