nfsstat.c revision 40627 
1/*
2 * Copyright (c) 1983, 1989, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1983, 1989, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)nfsstat.c	8.2 (Berkeley) 3/31/95";
46#endif
47static const char rcsid[] =
48	"$Id: nfsstat.c,v 1.10 1998/01/20 12:27:38 bde Exp $";
49#endif /* not lint */
50
51#include <sys/param.h>
52#include <sys/mount.h>
53#include <sys/time.h>
54#include <sys/sysctl.h>
55#include <nfs/rpcv2.h>
56#include <nfs/nfsproto.h>
57#include <nfs/nfs.h>
58#include <signal.h>
59#include <fcntl.h>
60#include <ctype.h>
61#include <errno.h>
62#include <kvm.h>
63#include <nlist.h>
64#include <unistd.h>
65#include <stdio.h>
66#include <stdlib.h>
67#include <string.h>
68#include <paths.h>
69#include <err.h>
70
71struct nlist nl[] = {
72#define	N_NFSSTAT	0
73	{ "_nfsstats" },
74	"",
75};
76kvm_t *kd;
77
78static int deadkernel = 0;
79
80void intpr __P((void));
81void printhdr __P((void));
82void sidewaysintpr __P((u_int));
83void usage __P((void));
84
85main(argc, argv)
86	int argc;
87	char **argv;
88{
89	extern int optind;
90	extern char *optarg;
91	u_int interval;
92	int ch;
93	char *memf, *nlistf;
94	char errbuf[80];
95
96	interval = 0;
97	memf = nlistf = NULL;
98	while ((ch = getopt(argc, argv, "M:N:w:")) != -1)
99		switch(ch) {
100		case 'M':
101			memf = optarg;
102			break;
103		case 'N':
104			nlistf = optarg;
105			break;
106		case 'w':
107			interval = atoi(optarg);
108			break;
109		case '?':
110		default:
111			usage();
112		}
113	argc -= optind;
114	argv += optind;
115
116#define	BACKWARD_COMPATIBILITY
117#ifdef	BACKWARD_COMPATIBILITY
118	if (*argv) {
119		interval = atoi(*argv);
120		if (*++argv) {
121			nlistf = *argv;
122			if (*++argv)
123				memf = *argv;
124		}
125	}
126#endif
127	/*
128	 * Discard setgid privileges if not the running kernel so that bad
129	 * guys can't print interesting stuff from kernel memory.
130	 */
131	if (nlistf != NULL || memf != NULL) {
132		setgid(getgid());
133		deadkernel = 1;
134
135		if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
136					errbuf)) == 0) {
137			errx(1, "kvm_openfiles: %s", errbuf);
138		}
139		if (kvm_nlist(kd, nl) != 0) {
140			errx(1, "kvm_nlist: can't get names");
141		}
142	}
143
144	if (interval)
145		sidewaysintpr(interval);
146	else
147		intpr();
148	exit(0);
149}
150
151/*
152 * Read the nfs stats using sysctl(3) for live kernels, or kvm_read
153 * for dead ones.
154 */
155void
156readstats(stp)
157	struct nfsstats *stp;
158{
159	if(deadkernel) {
160		if(kvm_read(kd, (u_long)nl[N_NFSSTAT].n_value, stp,
161			    sizeof *stp) < 0) {
162			err(1, "kvm_read");
163		}
164	} else {
165		size_t buflen = sizeof *stp;
166
167		if (sysctlbyname("vfs.nfs.nfsstats", stp, &buflen, (void *)0, (size_t)0) < 0) {
168			err(1, "sysctl");
169		}
170	}
171}
172
173/*
174 * Print a description of the nfs stats.
175 */
176void
177intpr()
178{
179	struct nfsstats nfsstats;
180
181	readstats(&nfsstats);
182
183	printf("Client Info:\n");
184	printf("Rpc Counts:\n");
185	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
186		"Getattr", "Setattr", "Lookup", "Readlink", "Read",
187		"Write", "Create", "Remove");
188	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
189		nfsstats.rpccnt[NFSPROC_GETATTR],
190		nfsstats.rpccnt[NFSPROC_SETATTR],
191		nfsstats.rpccnt[NFSPROC_LOOKUP],
192		nfsstats.rpccnt[NFSPROC_READLINK],
193		nfsstats.rpccnt[NFSPROC_READ],
194		nfsstats.rpccnt[NFSPROC_WRITE],
195		nfsstats.rpccnt[NFSPROC_CREATE],
196		nfsstats.rpccnt[NFSPROC_REMOVE]);
197	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
198		"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
199		"Readdir", "RdirPlus", "Access");
200	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
201		nfsstats.rpccnt[NFSPROC_RENAME],
202		nfsstats.rpccnt[NFSPROC_LINK],
203		nfsstats.rpccnt[NFSPROC_SYMLINK],
204		nfsstats.rpccnt[NFSPROC_MKDIR],
205		nfsstats.rpccnt[NFSPROC_RMDIR],
206		nfsstats.rpccnt[NFSPROC_READDIR],
207		nfsstats.rpccnt[NFSPROC_READDIRPLUS],
208		nfsstats.rpccnt[NFSPROC_ACCESS]);
209	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
210		"Mknod", "Fsstat", "Fsinfo", "PathConf", "Commit",
211		"GLease", "Vacate", "Evict");
212	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
213		nfsstats.rpccnt[NFSPROC_MKNOD],
214		nfsstats.rpccnt[NFSPROC_FSSTAT],
215		nfsstats.rpccnt[NFSPROC_FSINFO],
216		nfsstats.rpccnt[NFSPROC_PATHCONF],
217		nfsstats.rpccnt[NFSPROC_COMMIT],
218		nfsstats.rpccnt[NQNFSPROC_GETLEASE],
219		nfsstats.rpccnt[NQNFSPROC_VACATED],
220		nfsstats.rpccnt[NQNFSPROC_EVICTED]);
221	printf("Rpc Info:\n");
222	printf("%9.9s %9.9s %9.9s %9.9s %9.9s\n",
223		"TimedOut", "Invalid", "X Replies", "Retries", "Requests");
224	printf("%9d %9d %9d %9d %9d\n",
225		nfsstats.rpctimeouts,
226		nfsstats.rpcinvalid,
227		nfsstats.rpcunexpected,
228		nfsstats.rpcretries,
229		nfsstats.rpcrequests);
230	printf("Cache Info:\n");
231	printf("%9.9s %9.9s %9.9s %9.9s",
232		"Attr Hits", "Misses", "Lkup Hits", "Misses");
233	printf(" %9.9s %9.9s %9.9s %9.9s\n",
234		"BioR Hits", "Misses", "BioW Hits", "Misses");
235	printf("%9d %9d %9d %9d",
236		nfsstats.attrcache_hits, nfsstats.attrcache_misses,
237		nfsstats.lookupcache_hits, nfsstats.lookupcache_misses);
238	printf(" %9d %9d %9d %9d\n",
239		nfsstats.biocache_reads-nfsstats.read_bios,
240		nfsstats.read_bios,
241		nfsstats.biocache_writes-nfsstats.write_bios,
242		nfsstats.write_bios);
243	printf("%9.9s %9.9s %9.9s %9.9s",
244		"BioRLHits", "Misses", "BioD Hits", "Misses");
245	printf(" %9.9s %9.9s\n", "DirE Hits", "Misses");
246	printf("%9d %9d %9d %9d",
247		nfsstats.biocache_readlinks-nfsstats.readlink_bios,
248		nfsstats.readlink_bios,
249		nfsstats.biocache_readdirs-nfsstats.readdir_bios,
250		nfsstats.readdir_bios);
251	printf(" %9d %9d\n",
252		nfsstats.direofcache_hits, nfsstats.direofcache_misses);
253	printf("\nServer Info:\n");
254	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
255		"Getattr", "Setattr", "Lookup", "Readlink", "Read",
256		"Write", "Create", "Remove");
257	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
258		nfsstats.srvrpccnt[NFSPROC_GETATTR],
259		nfsstats.srvrpccnt[NFSPROC_SETATTR],
260		nfsstats.srvrpccnt[NFSPROC_LOOKUP],
261		nfsstats.srvrpccnt[NFSPROC_READLINK],
262		nfsstats.srvrpccnt[NFSPROC_READ],
263		nfsstats.srvrpccnt[NFSPROC_WRITE],
264		nfsstats.srvrpccnt[NFSPROC_CREATE],
265		nfsstats.srvrpccnt[NFSPROC_REMOVE]);
266	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
267		"Rename", "Link", "Symlink", "Mkdir", "Rmdir",
268		"Readdir", "RdirPlus", "Access");
269	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
270		nfsstats.srvrpccnt[NFSPROC_RENAME],
271		nfsstats.srvrpccnt[NFSPROC_LINK],
272		nfsstats.srvrpccnt[NFSPROC_SYMLINK],
273		nfsstats.srvrpccnt[NFSPROC_MKDIR],
274		nfsstats.srvrpccnt[NFSPROC_RMDIR],
275		nfsstats.srvrpccnt[NFSPROC_READDIR],
276		nfsstats.srvrpccnt[NFSPROC_READDIRPLUS],
277		nfsstats.srvrpccnt[NFSPROC_ACCESS]);
278	printf("%9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s %9.9s\n",
279		"Mknod", "Fsstat", "Fsinfo", "PathConf", "Commit",
280		"GLease", "Vacate", "Evict");
281	printf("%9d %9d %9d %9d %9d %9d %9d %9d\n",
282		nfsstats.srvrpccnt[NFSPROC_MKNOD],
283		nfsstats.srvrpccnt[NFSPROC_FSSTAT],
284		nfsstats.srvrpccnt[NFSPROC_FSINFO],
285		nfsstats.srvrpccnt[NFSPROC_PATHCONF],
286		nfsstats.srvrpccnt[NFSPROC_COMMIT],
287		nfsstats.srvrpccnt[NQNFSPROC_GETLEASE],
288		nfsstats.srvrpccnt[NQNFSPROC_VACATED],
289		nfsstats.srvrpccnt[NQNFSPROC_EVICTED]);
290	printf("Server Ret-Failed\n");
291	printf("%17d\n", nfsstats.srvrpc_errs);
292	printf("Server Faults\n");
293	printf("%13d\n", nfsstats.srv_errs);
294	printf("Server Cache Stats:\n");
295	printf("%9.9s %9.9s %9.9s %9.9s\n",
296		"Inprog", "Idem", "Non-idem", "Misses");
297	printf("%9d %9d %9d %9d\n",
298		nfsstats.srvcache_inproghits,
299		nfsstats.srvcache_idemdonehits,
300		nfsstats.srvcache_nonidemdonehits,
301		nfsstats.srvcache_misses);
302	printf("Server Lease Stats:\n");
303	printf("%9.9s %9.9s %9.9s\n",
304		"Leases", "PeakL", "GLeases");
305	printf("%9d %9d %9d\n",
306		nfsstats.srvnqnfs_leases,
307		nfsstats.srvnqnfs_maxleases,
308		nfsstats.srvnqnfs_getleases);
309	printf("Server Write Gathering:\n");
310	printf("%9.9s %9.9s %9.9s\n",
311		"WriteOps", "WriteRPC", "Opsaved");
312	printf("%9d %9d %9d\n",
313		nfsstats.srvvop_writes,
314		nfsstats.srvrpccnt[NFSPROC_WRITE],
315		nfsstats.srvrpccnt[NFSPROC_WRITE] - nfsstats.srvvop_writes);
316}
317
318u_char	signalled;			/* set if alarm goes off "early" */
319
320/*
321 * Print a running summary of nfs statistics.
322 * Repeat display every interval seconds, showing statistics
323 * collected over that interval.  Assumes that interval is non-zero.
324 * First line printed at top of screen is always cumulative.
325 */
326void
327sidewaysintpr(interval)
328	u_int interval;
329{
330	struct nfsstats nfsstats, lastst;
331	int hdrcnt, oldmask;
332	void catchalarm();
333
334	(void)signal(SIGALRM, catchalarm);
335	signalled = 0;
336	(void)alarm(interval);
337	bzero((caddr_t)&lastst, sizeof(lastst));
338
339	for (hdrcnt = 1;;) {
340		if (!--hdrcnt) {
341			printhdr();
342			hdrcnt = 20;
343		}
344		readstats(&nfsstats);
345		printf("Client: %8d %8d %8d %8d %8d %8d %8d %8d\n",
346		    nfsstats.rpccnt[NFSPROC_GETATTR]-lastst.rpccnt[NFSPROC_GETATTR],
347		    nfsstats.rpccnt[NFSPROC_LOOKUP]-lastst.rpccnt[NFSPROC_LOOKUP],
348		    nfsstats.rpccnt[NFSPROC_READLINK]-lastst.rpccnt[NFSPROC_READLINK],
349		    nfsstats.rpccnt[NFSPROC_READ]-lastst.rpccnt[NFSPROC_READ],
350		    nfsstats.rpccnt[NFSPROC_WRITE]-lastst.rpccnt[NFSPROC_WRITE],
351		    nfsstats.rpccnt[NFSPROC_RENAME]-lastst.rpccnt[NFSPROC_RENAME],
352		    nfsstats.rpccnt[NFSPROC_ACCESS]-lastst.rpccnt[NFSPROC_ACCESS],
353		    (nfsstats.rpccnt[NFSPROC_READDIR]-lastst.rpccnt[NFSPROC_READDIR])
354		    +(nfsstats.rpccnt[NFSPROC_READDIRPLUS]-lastst.rpccnt[NFSPROC_READDIRPLUS]));
355		printf("Server: %8d %8d %8d %8d %8d %8d %8d %8d\n",
356		    nfsstats.srvrpccnt[NFSPROC_GETATTR]-lastst.srvrpccnt[NFSPROC_GETATTR],
357		    nfsstats.srvrpccnt[NFSPROC_LOOKUP]-lastst.srvrpccnt[NFSPROC_LOOKUP],
358		    nfsstats.srvrpccnt[NFSPROC_READLINK]-lastst.srvrpccnt[NFSPROC_READLINK],
359		    nfsstats.srvrpccnt[NFSPROC_READ]-lastst.srvrpccnt[NFSPROC_READ],
360		    nfsstats.srvrpccnt[NFSPROC_WRITE]-lastst.srvrpccnt[NFSPROC_WRITE],
361		    nfsstats.srvrpccnt[NFSPROC_RENAME]-lastst.srvrpccnt[NFSPROC_RENAME],
362		    nfsstats.srvrpccnt[NFSPROC_ACCESS]-lastst.srvrpccnt[NFSPROC_ACCESS],
363		    (nfsstats.srvrpccnt[NFSPROC_READDIR]-lastst.srvrpccnt[NFSPROC_READDIR])
364		    +(nfsstats.srvrpccnt[NFSPROC_READDIRPLUS]-lastst.srvrpccnt[NFSPROC_READDIRPLUS]));
365		lastst = nfsstats;
366		fflush(stdout);
367		oldmask = sigblock(sigmask(SIGALRM));
368		if (!signalled)
369			sigpause(0);
370		sigsetmask(oldmask);
371		signalled = 0;
372		(void)alarm(interval);
373	}
374	/*NOTREACHED*/
375}
376
377void
378printhdr()
379{
380	printf("        %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s %8.8s\n",
381	    "Getattr", "Lookup", "Readlink", "Read", "Write", "Rename",
382	    "Access", "Readdir");
383	fflush(stdout);
384}
385
386/*
387 * Called if an interval expires before sidewaysintpr has completed a loop.
388 * Sets a flag to not wait for the alarm.
389 */
390void
391catchalarm()
392{
393	signalled = 1;
394}
395
396void
397usage()
398{
399	(void)fprintf(stderr,
400	    "usage: nfsstat [-M core] [-N system] [-w interval]\n");
401	exit(1);
402}
403