289 lines
8.2 KiB
C
289 lines
8.2 KiB
C
/*
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* vmstat_bsdi4.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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#include <sys/proc.h>
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#include <sys/dkstat.h>
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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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#include <vm/vm_param.h>
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#include <vm/vm_extern.h>
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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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/*
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* CPU percentage
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*/
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#define CPU_PRC 100
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#define BOOTTIME_SYMBOL "boottime"
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FindVarMethod var_extensible_vmstat;
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void
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init_vmstat_bsdi4(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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/*
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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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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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double cpu_prc;
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static struct vmmeter mem_old, mem_new;
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int mem_mib[] = { CTL_VM, VM_CNT };
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size_t mem_size = sizeof(struct vmmeter);
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int cpu_mib[] = { CTL_KERN, KERN_CPUSTATS };
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size_t cpu_size = sizeof(struct cpustats);
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static long long_ret;
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static char errmsg[300];
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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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sysctl(cpu_mib, 2, &cpu_new, &cpu_size, NULL, 0);
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cpu_total = 0;
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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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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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sysctl(mem_mib, 2, &mem_new, &mem_size, NULL, 0);
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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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#define ptok(p) ((p) * (mem_new.v_page_size >> 10))
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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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long_ret = ptok(mem_new.v_swpin - mem_old.v_swpin);
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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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long_ret = ptok(mem_new.v_swpout - mem_old.v_swpout);
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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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cpu_sum = cpu_diff[CP_USER] + cpu_diff[CP_NICE];
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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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cpu_sum = cpu_diff[CP_SYS] + cpu_diff[CP_INTR];
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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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cpu_sum = cpu_diff[CP_IDLE];
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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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long_ret = cpu_new[CP_USER];
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return ((u_char *) (&long_ret));
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case CPURAWNICE:
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long_ret = cpu_new[CP_NICE];
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return ((u_char *) (&long_ret));
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case CPURAWSYSTEM:
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long_ret = cpu_new[CP_SYS] + cpu_new[CP_INTR];
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return ((u_char *) (&long_ret));
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case CPURAWIDLE:
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long_ret = cpu_new[CP_IDLE];
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return ((u_char *) (&long_ret));
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case CPURAWKERNEL:
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long_ret = cpu_new[CP_SYS];
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return ((u_char *) (&long_ret));
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case CPURAWINTR:
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long_ret = cpu_new[CP_INTR];
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return ((u_char *) (&long_ret));
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/*
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* reserved for future use
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*/
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/*
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* case ERRORFLAG:
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* return((u_char *) (&long_ret));
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* case ERRORMSG:
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* return((u_char *) (&long_ret));
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*/
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}
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return NULL;
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}
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