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|
/*
* vmstat_freebsd2.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>
#if defined(dragonfly)
#include <sys/user.h>
#else
#include <sys/proc.h>
#endif
#if defined(freebsd5) && __FreeBSD_version >= 500101
#include <sys/resource.h>
#elif defined(dragonfly)
#include <kinfo.h>
#else
#include <sys/dkstat.h>
#endif
#ifdef freebsd5
#include <sys/bio.h>
#endif
#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 HAVE_SYS_VMPARAM_H
#include <sys/vmparam.h>
#else
#include <vm/vm_param.h>
#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>
#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/header_generic.h"
#include "vmstat.h"
#include "vmstat_freebsd2.h"
/*
* nlist symbols
*/
#define CPTIME_SYMBOL "cp_time"
#define SUM_SYMBOL "cnt"
#define INTRCNT_SYMBOL "intrcnt"
#define EINTRCNT_SYMBOL "eintrcnt"
#define BOOTTIME_SYMBOL "boottime"
/*
* Number of interrupts
*/
#define INT_COUNT 10
/*
* CPU percentage
*/
#define CPU_PRC 100
FindVarMethod var_extensible_vmstat;
void
init_vmstat_freebsd2(void)
{
struct variable2 extensible_vmstat_variables[] = {
{MIBINDEX, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {MIBINDEX}},
{ERRORNAME, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {ERRORNAME}},
{SWAPIN, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SWAPIN}},
{SWAPOUT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SWAPOUT}},
{IOSENT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {IOSENT}},
{IORECEIVE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {IORECEIVE}},
{SYSINTERRUPTS, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SYSINTERRUPTS}},
{SYSCONTEXT, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SYSCONTEXT}},
{CPUUSER, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPUUSER}},
{CPUSYSTEM, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPUSYSTEM}},
{CPUIDLE, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPUIDLE}},
{CPURAWUSER, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWUSER}},
{CPURAWNICE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWNICE}},
{CPURAWSYSTEM, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWSYSTEM}},
{CPURAWIDLE, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWIDLE}},
{CPURAWKERNEL, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWKERNEL}},
{CPURAWINTR, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {CPURAWINTR}},
{SYSRAWINTERRUPTS, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SYSRAWINTERRUPTS}},
{SYSRAWCONTEXT, ASN_COUNTER, NETSNMP_OLDAPI_RONLY,
var_extensible_vmstat, 1, {SYSRAWCONTEXT}},
/*
* Future use:
*/
/*
* {ERRORFLAG, ASN_INTEGER, NETSNMP_OLDAPI_RONLY,
* var_extensible_vmstat, 1, {ERRORFLAG }},
* {ERRORMSG, ASN_OCTET_STR, NETSNMP_OLDAPI_RONLY,
* var_extensible_vmstat, 1, {ERRORMSG }}
*/
};
/*
* Define the OID pointer to the top of the mib tree that we're
* registering underneath
*/
oid vmstat_variables_oid[] = { NETSNMP_UCDAVIS_MIB, 11 };
/*
* register ourselves with the agent to handle our mib tree
*/
REGISTER_MIB("ucd-snmp/vmstat", extensible_vmstat_variables, variable2,
vmstat_variables_oid);
}
long
getuptime(void)
{
static time_t now, boottime;
time_t uptime;
if (boottime == 0)
auto_nlist(BOOTTIME_SYMBOL, (char *) &boottime, sizeof(boottime));
time(&now);
uptime = now - boottime;
return (uptime);
}
unsigned char *
var_extensible_vmstat(struct variable *vp,
oid * name,
size_t * length,
int exact,
size_t * var_len, WriteMethod ** write_method)
{
int loop;
time_t time_new = getuptime();
static time_t time_old;
static time_t time_diff;
#if defined(dragonfly)
static struct kinfo_cputime cpu_old, cpu_new, cpu_diff;
static uint64_t cpu_total;
uint64_t cpu_sum;
static int pagesize;
#else
static long cpu_old[CPUSTATES];
static long cpu_new[CPUSTATES];
static long cpu_diff[CPUSTATES];
static long cpu_total;
long cpu_sum;
#endif
double cpu_prc;
static struct vmmeter mem_old, mem_new;
static long long_ret;
static char errmsg[300];
#if defined(dragonfly)
if (pagesize == 0)
pagesize = getpagesize() >> 10;
#endif
long_ret = 0; /* set to 0 as default */
if (header_generic(vp, name, length, exact, var_len, write_method))
return (NULL);
/*
* Update structures (only if time has passed)
*/
if (time_new != time_old) {
time_diff = time_new - time_old;
time_old = time_new;
/*
* CPU usage
*/
cpu_total = 0;
#if defined(dragonfly)
kinfo_get_sched_cputime(&cpu_new);
#define CP_UPDATE(field) cpu_diff.field = cpu_new.field - cpu_old.field; cpu_total += cpu_diff.field;
CP_UPDATE(cp_user);
CP_UPDATE(cp_nice);
CP_UPDATE(cp_sys);
CP_UPDATE(cp_intr);
CP_UPDATE(cp_idle);
cpu_old = cpu_new;
#undef CP_UPDATE
#else
auto_nlist(CPTIME_SYMBOL, (char *) cpu_new, sizeof(cpu_new));
for (loop = 0; loop < CPUSTATES; loop++) {
cpu_diff[loop] = cpu_new[loop] - cpu_old[loop];
cpu_old[loop] = cpu_new[loop];
cpu_total += cpu_diff[loop];
}
#endif
if (cpu_total == 0)
cpu_total = 1;
/*
* Memory info
*/
mem_old = mem_new;
auto_nlist(SUM_SYMBOL, (char *) &mem_new, sizeof(mem_new));
}
/*
* Rate macro
*/
#define rate(x) (((x)+ time_diff/2) / time_diff)
/*
* Page-to-kb macro
*/
#if defined(dragonfly)
#define ptok(p) ((p) * pagesize)
#else
#define ptok(p) ((p) * (mem_new.v_page_size >> 10))
#endif
switch (vp->magic) {
case MIBINDEX:
long_ret = 1;
return ((u_char *) (&long_ret));
case ERRORNAME: /* dummy name */
sprintf(errmsg, "systemStats");
*var_len = strlen(errmsg);
return ((u_char *) (errmsg));
case SWAPIN:
#if defined(openbsd2) || defined(darwin)
long_ret = ptok(mem_new.v_swpin - mem_old.v_swpin);
#else
long_ret = ptok(mem_new.v_swappgsin - mem_old.v_swappgsin +
mem_new.v_vnodepgsin - mem_old.v_vnodepgsin);
#endif
long_ret = rate(long_ret);
return ((u_char *) (&long_ret));
case SWAPOUT:
#if defined(openbsd2) || defined(darwin)
long_ret = ptok(mem_new.v_swpout - mem_old.v_swpout);
#else
long_ret = ptok(mem_new.v_swappgsout - mem_old.v_swappgsout +
mem_new.v_vnodepgsout - mem_old.v_vnodepgsout);
#endif
long_ret = rate(long_ret);
return ((u_char *) (&long_ret));
case IOSENT:
#if NETSNMP_NO_DUMMY_VALUES
return NULL;
#endif
long_ret = -1;
return ((u_char *) (&long_ret));
case IORECEIVE:
#if NETSNMP_NO_DUMMY_VALUES
return NULL;
#endif
long_ret = -1;
return ((u_char *) (&long_ret));
case SYSINTERRUPTS:
long_ret = rate(mem_new.v_intr - mem_old.v_intr);
return ((u_char *) (&long_ret));
case SYSCONTEXT:
long_ret = rate(mem_new.v_swtch - mem_old.v_swtch);
return ((u_char *) (&long_ret));
case CPUUSER:
#if defined(dragonfly)
cpu_sum = cpu_diff.cp_user + cpu_diff.cp_nice;
#else
cpu_sum = cpu_diff[CP_USER] + cpu_diff[CP_NICE];
#endif
cpu_prc = (float) cpu_sum / (float) cpu_total;
long_ret = cpu_prc * CPU_PRC;
return ((u_char *) (&long_ret));
case CPUSYSTEM:
#if defined(dragonfly)
cpu_sum = cpu_diff.cp_sys + cpu_diff.cp_intr;
#else
cpu_sum = cpu_diff[CP_SYS] + cpu_diff[CP_INTR];
#endif
cpu_prc = (float) cpu_sum / (float) cpu_total;
long_ret = cpu_prc * CPU_PRC;
return ((u_char *) (&long_ret));
case CPUIDLE:
#if defined(dragonfly)
cpu_sum = cpu_diff.cp_idle;
#else
cpu_sum = cpu_diff[CP_IDLE];
#endif
cpu_prc = (float) cpu_sum / (float) cpu_total;
long_ret = cpu_prc * CPU_PRC;
return ((u_char *) (&long_ret));
case CPURAWUSER:
#if defined(dragonfly)
long_ret = cpu_new.cp_user;
#else
long_ret = cpu_new[CP_USER];
#endif
return ((u_char *) (&long_ret));
case CPURAWNICE:
#if defined(dragonfly)
long_ret = cpu_new.cp_nice;
#else
long_ret = cpu_new[CP_NICE];
#endif
return ((u_char *) (&long_ret));
case CPURAWSYSTEM:
#if defined(dragonfly)
long_ret = cpu_new.cp_sys + cpu_new.cp_nice;
#else
long_ret = cpu_new[CP_SYS] + cpu_new[CP_INTR];
#endif
return ((u_char *) (&long_ret));
case CPURAWIDLE:
#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;
}
|
