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Use new NFS sysctl interface to get statistics rather than reading /dev/kmem,

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unless the user specifies a dead kernel to operate on.
This commit is contained in:
Garrett Wollman 1994-10-23 23:25:43 +00:00
parent fb5a05599e
commit 07e532e7d6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=3819
2 changed files with 53 additions and 33 deletions
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4
usr.bin/nfsstat/nfsstat.1
View File

@ -29,7 +29,8 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)nfsstat.1 8.1 (Berkeley) 6/6/93
.\" From: @(#)nfsstat.1 8.1 (Berkeley) 6/6/93
.\" $Id$
.\"
.Dd June 6, 1993
.Dt NFSSTAT 1
@ -79,6 +80,7 @@ default memory file
.Xr ps 1 ,
.Xr systat 1 ,
.Xr vmstat 1 ,
.Xr sysctl 3 ,
.Xr iostat 8 ,
.Xr pstat 8 ,
.Sh HISTORY

82
usr.bin/nfsstat/nfsstat.c
View File

@ -41,19 +41,14 @@ static char copyright[] =
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)nfsstat.c 8.1 (Berkeley) 6/6/93";
/*static char sccsid[] = "From: @(#)nfsstat.c 8.1 (Berkeley) 6/6/93";*/
static const char rcsid[] =
"$Id$";
#endif /* not lint */
#include <sys/param.h>
#if BSD >= 199103
#define NEWVM
#endif
#ifndef NEWVM
#include <sys/vmmac.h>
#include <sys/ucred.h>
#include <machine/pte.h>
#endif
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <nfs/nfsv2.h>
#include <nfs/nfs.h>
#include <signal.h>
@ -67,6 +62,7 @@ static char sccsid[] = "@(#)nfsstat.c 8.1 (Berkeley) 6/6/93";
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <err.h>
struct nlist nl[] = {
#define N_NFSSTAT 0
@ -75,7 +71,9 @@ struct nlist nl[] = {
};
kvm_t *kd;
void intpr(), printhdr(), sidewaysintpr(), usage();
static int deadkernel = 0;
void intpr(void), printhdr(void), sidewaysintpr(u_int), usage(void);
main(argc, argv)
int argc;
@ -123,38 +121,62 @@ main(argc, argv)
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL)
if (nlistf != NULL || memf != NULL) {
setgid(getgid());
deadkernel = 1;
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == 0) {
fprintf(stderr, "nfsstat: kvm_openfiles: %s\n", errbuf);
exit(1);
}
if (kvm_nlist(kd, nl) != 0) {
fprintf(stderr, "nfsstat: kvm_nlist: can't get names\n");
exit(1);
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
errbuf)) == 0) {
errx(1, "kvm_openfiles: %s", errbuf);
}
if (kvm_nlist(kd, nl) != 0) {
errx(1, "kvm_nlist: can't get names");
}
}
if (interval)
sidewaysintpr(interval, nl[N_NFSSTAT].n_value);
sidewaysintpr(interval);
else
intpr(nl[N_NFSSTAT].n_value);
intpr();
exit(0);
}
/*
* Read the nfs stats using sysctl(3) for live kernels, or kvm_read
* for dead ones.
*/
void
readstats(struct nfsstats *stp)
{
if(deadkernel) {
if(kvm_read(kd, (u_long)nl[N_NFSSTAT].n_value, stp,
sizeof *stp) < 0) {
err(1, "kvm_read");
}
} else {
int name[3];
size_t buflen = sizeof *stp;
name[0] = CTL_FS;
name[1] = MOUNT_NFS;
name[2] = NFS_NFSSTATS;
if(sysctl(name, 3, stp, &buflen, (void *)0, (size_t)0) < 0) {
err(1, "sysctl");
}
}
}
/*
* Print a description of the nfs stats.
*/
void
intpr(nfsstataddr)
u_long nfsstataddr;
intpr(void)
{
struct nfsstats nfsstats;
if (kvm_read(kd, (u_long)nfsstataddr, (char *)&nfsstats, sizeof(struct nfsstats)) < 0) {
fprintf(stderr, "nfsstat: kvm_read failed\n");
exit(1);
}
readstats(&nfsstats);
printf("Client Info:\n");
printf("Rpc Counts:\n");
printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
@ -280,9 +302,8 @@ u_char signalled; /* set if alarm goes off "early" */
* First line printed at top of screen is always cumulative.
*/
void
sidewaysintpr(interval, off)
sidewaysintpr(interval)
u_int interval;
u_long off;
{
struct nfsstats nfsstats, lastst;
int hdrcnt, oldmask;
@ -298,10 +319,7 @@ sidewaysintpr(interval, off)
printhdr();
hdrcnt = 20;
}
if (kvm_read(kd, off, (char *)&nfsstats, sizeof nfsstats) < 0) {
fprintf(stderr, "nfsstat: kvm_read failed\n");
exit(1);
}
readstats(&nfsstats);
printf("Client: %8d %8d %8d %8d %8d %8d %8d %8d\n",
nfsstats.rpccnt[1]-lastst.rpccnt[1],
nfsstats.rpccnt[4]-lastst.rpccnt[4],