vmstat_freebsd2.c
上传用户:wxp200602
上传日期:2007-10-30
资源大小:4028k
文件大小:9k
- /*
- * 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>
- #include <sys/proc.h>
- #if defined(freebsd5) && __FreeBSD_version >= 500101
- #include <sys/resource.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.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, RONLY, var_extensible_vmstat, 1,
- {MIBINDEX}},
- {ERRORNAME, ASN_OCTET_STR, RONLY, var_extensible_vmstat, 1,
- {ERRORNAME}},
- {SWAPIN, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {SWAPIN}},
- {SWAPOUT, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {SWAPOUT}},
- {IOSENT, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {IOSENT}},
- {IORECEIVE, ASN_INTEGER, RONLY, var_extensible_vmstat, 1,
- {IORECEIVE}},
- {SYSINTERRUPTS, ASN_INTEGER, RONLY, var_extensible_vmstat, 1,
- {SYSINTERRUPTS}},
- {SYSCONTEXT, ASN_INTEGER, RONLY, var_extensible_vmstat, 1,
- {SYSCONTEXT}},
- {CPUUSER, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {CPUUSER}},
- {CPUSYSTEM, ASN_INTEGER, RONLY, var_extensible_vmstat, 1,
- {CPUSYSTEM}},
- {CPUIDLE, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {CPUIDLE}},
- {CPURAWUSER, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWUSER}},
- {CPURAWNICE, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWNICE}},
- {CPURAWSYSTEM, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWSYSTEM}},
- {CPURAWIDLE, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWIDLE}},
- {CPURAWKERNEL, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWKERNEL}},
- {CPURAWINTR, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {CPURAWINTR}},
- {SYSRAWINTERRUPTS, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {SYSRAWINTERRUPTS}},
- {SYSRAWCONTEXT, ASN_COUNTER, RONLY, var_extensible_vmstat, 1,
- {SYSRAWCONTEXT}},
- /*
- * Future use:
- */
- /*
- * {ERRORFLAG, ASN_INTEGER, RONLY, var_extensible_vmstat, 1, {ERRORFLAG }},
- * {ERRORMSG, ASN_OCTET_STR, 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[] = { 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;
- static long cpu_old[CPUSTATES];
- static long cpu_new[CPUSTATES];
- static long cpu_diff[CPUSTATES];
- static long cpu_total;
- long cpu_sum;
- double cpu_prc;
- static struct vmmeter mem_old, mem_new;
- static long long_ret;
- static char errmsg[300];
- 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
- */
- auto_nlist(CPTIME_SYMBOL, (char *) cpu_new, sizeof(cpu_new));
- cpu_total = 0;
- 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];
- }
- 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
- */
- #define ptok(p) ((p) * (mem_new.v_page_size >> 10))
- 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 NO_DUMMY_VALUES
- return NULL;
- #endif
- long_ret = -1;
- return ((u_char *) (&long_ret));
- case IORECEIVE:
- #if 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:
- cpu_sum = cpu_diff[CP_USER] + cpu_diff[CP_NICE];
- cpu_prc = (float) cpu_sum / (float) cpu_total;
- long_ret = cpu_prc * CPU_PRC;
- return ((u_char *) (&long_ret));
- case CPUSYSTEM:
- cpu_sum = cpu_diff[CP_SYS] + cpu_diff[CP_INTR];
- cpu_prc = (float) cpu_sum / (float) cpu_total;
- long_ret = cpu_prc * CPU_PRC;
- return ((u_char *) (&long_ret));
- case CPUIDLE:
- cpu_sum = cpu_diff[CP_IDLE];
- cpu_prc = (float) cpu_sum / (float) cpu_total;
- long_ret = cpu_prc * CPU_PRC;
- return ((u_char *) (&long_ret));
- case CPURAWUSER:
- long_ret = cpu_new[CP_USER];
- return ((u_char *) (&long_ret));
- case CPURAWNICE:
- long_ret = cpu_new[CP_NICE];
- return ((u_char *) (&long_ret));
- case CPURAWSYSTEM:
- long_ret = cpu_new[CP_SYS] + cpu_new[CP_INTR];
- return ((u_char *) (&long_ret));
- case CPURAWIDLE:
- long_ret = cpu_new[CP_IDLE];
- return ((u_char *) (&long_ret));
- case CPURAWKERNEL:
- long_ret = cpu_new[CP_SYS];
- return ((u_char *) (&long_ret));
- case CPURAWINTR:
- long_ret = cpu_new[CP_INTR];
- 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;
- }