xref: /freebsd/libexec/rpc.rstatd/rstat_proc.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*
2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3  * unrestricted use provided that this legend is included on all tape
4  * media and as a part of the software program in whole or part.  Users
5  * may copy or modify Sun RPC without charge, but are not authorized
6  * to license or distribute it to anyone else except as part of a product or
7  * program developed by the user.
8  *
9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12  *
13  * Sun RPC is provided with no support and without any obligation on the
14  * part of Sun Microsystems, Inc. to assist in its use, correction,
15  * modification or enhancement.
16  *
17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19  * OR ANY PART THEREOF.
20  *
21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22  * or profits or other special, indirect and consequential damages, even if
23  * Sun has been advised of the possibility of such damages.
24  *
25  * Sun Microsystems, Inc.
26  * 2550 Garcia Avenue
27  * Mountain View, California  94043
28  */
29 
30 #ifndef lint
31 #if 0
32 static char sccsid[] = "from: @(#)rpc.rstatd.c 1.1 86/09/25 Copyr 1984 Sun Micro";
33 static char sccsid[] = "from: @(#)rstat_proc.c	2.2 88/08/01 4.0 RPCSRC";
34 #endif
35 static const char rcsid[] =
36   "$FreeBSD$";
37 #endif
38 
39 /*
40  * rstat service:  built with rstat.x and derived from rpc.rstatd.c
41  *
42  * Copyright (c) 1984 by Sun Microsystems, Inc.
43  */
44 
45 #include <sys/types.h>
46 #include <sys/socket.h>
47 #include <sys/sysctl.h>
48 #include <sys/time.h>
49 #include <sys/resource.h>
50 #include <sys/vmmeter.h>
51 #include <sys/param.h>
52 
53 #include <err.h>
54 #include <errno.h>
55 #include <fcntl.h>
56 #include <kvm.h>
57 #include <limits.h>
58 #include <nlist.h>
59 #include <signal.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <syslog.h>
64 #include <unistd.h>
65 #include <devstat.h>
66 
67 #include <net/if.h>
68 #include <net/if_mib.h>
69 
70 #undef FSHIFT			 /* Use protocol's shift and scale values */
71 #undef FSCALE
72 #undef if_ipackets
73 #undef if_ierrors
74 #undef if_opackets
75 #undef if_oerrors
76 #undef if_collisions
77 #include <rpcsvc/rstat.h>
78 
79 struct nlist nl[] = {
80 #define	X_CPTIME	0
81 	{ "_cp_time" },
82 #define	X_CNT		1
83 	{ "_cnt" },
84 	{ "" },
85 };
86 
87 int haveadisk(void);
88 void updatexfers(int, int *);
89 void setup(void);
90 int stats_service(void);
91 
92 extern int from_inetd;
93 int sincelastreq = 0;		/* number of alarms since last request */
94 extern int closedown;
95 
96 union {
97     struct stats s1;
98     struct statsswtch s2;
99     struct statstime s3;
100 } stats_all;
101 
102 void updatestat();
103 static int stat_is_init = 0;
104 static kvm_t *kd;
105 
106 static int	cp_time_xlat[RSTAT_CPUSTATES] = { CP_USER, CP_NICE, CP_SYS,
107 							CP_IDLE };
108 static long	bsd_cp_time[CPUSTATES];
109 
110 
111 #ifndef FSCALE
112 #define FSCALE (1 << 8)
113 #endif
114 
115 void
116 stat_init(void)
117 {
118     stat_is_init = 1;
119     setup();
120     alarm(0);
121     updatestat();
122     (void) signal(SIGALRM, updatestat);
123     alarm(1);
124 }
125 
126 statstime *
127 rstatproc_stats_3_svc(void *argp, struct svc_req *rqstp)
128 {
129     if (! stat_is_init)
130         stat_init();
131     sincelastreq = 0;
132     return(&stats_all.s3);
133 }
134 
135 statsswtch *
136 rstatproc_stats_2_svc(void *argp, struct svc_req *rqstp)
137 {
138     if (! stat_is_init)
139         stat_init();
140     sincelastreq = 0;
141     return(&stats_all.s2);
142 }
143 
144 stats *
145 rstatproc_stats_1_svc(void *argp, struct svc_req *rqstp)
146 {
147     if (! stat_is_init)
148         stat_init();
149     sincelastreq = 0;
150     return(&stats_all.s1);
151 }
152 
153 u_int *
154 rstatproc_havedisk_3_svc(void *argp, struct svc_req *rqstp)
155 {
156     static u_int have;
157 
158     if (! stat_is_init)
159         stat_init();
160     sincelastreq = 0;
161     have = haveadisk();
162 	return(&have);
163 }
164 
165 u_int *
166 rstatproc_havedisk_2_svc(void *argp, struct svc_req *rqstp)
167 {
168     return(rstatproc_havedisk_3_svc(argp, rqstp));
169 }
170 
171 u_int *
172 rstatproc_havedisk_1_svc(void *argp, struct svc_req *rqstp)
173 {
174     return(rstatproc_havedisk_3_svc(argp, rqstp));
175 }
176 
177 void
178 updatestat(void)
179 {
180 	int i, hz;
181 	struct clockinfo clockrate;
182 	struct vmmeter cnt;
183 	struct ifmibdata ifmd;
184 	double avrun[3];
185 	struct timeval tm, btm;
186 	int mib[6];
187 	size_t len;
188 	int ifcount;
189 
190 #ifdef DEBUG
191 	fprintf(stderr, "entering updatestat\n");
192 #endif
193 	if (sincelastreq >= closedown) {
194 #ifdef DEBUG
195                 fprintf(stderr, "about to closedown\n");
196 #endif
197 		kvm_close(kd);
198                 if (from_inetd)
199                         exit(0);
200                 else {
201                         stat_is_init = 0;
202                         return;
203                 }
204 	}
205 	sincelastreq++;
206 
207 	mib[0] = CTL_KERN;
208 	mib[1] = KERN_CLOCKRATE;
209 	len = sizeof clockrate;
210 	if (sysctl(mib, 2, &clockrate, &len, 0, 0) < 0) {
211 		syslog(LOG_ERR, "sysctl(kern.clockrate): %m");
212 		exit(1);
213 	}
214 	hz = clockrate.hz;
215 
216 	if (kvm_read(kd, (long)nl[X_CPTIME].n_value, (char *)bsd_cp_time, sizeof(bsd_cp_time))
217 	    != sizeof(bsd_cp_time)) {
218 		syslog(LOG_ERR, "rstat: can't read cp_time from kmem");
219 		exit(1);
220 	}
221 	for(i = 0; i < RSTAT_CPUSTATES ; i++)
222 		stats_all.s1.cp_time[i] = bsd_cp_time[cp_time_xlat[i]];
223 
224         (void)getloadavg(avrun, sizeof(avrun) / sizeof(avrun[0]));
225 
226 	stats_all.s2.avenrun[0] = avrun[0] * FSCALE;
227 	stats_all.s2.avenrun[1] = avrun[1] * FSCALE;
228 	stats_all.s2.avenrun[2] = avrun[2] * FSCALE;
229 
230 	mib[0] = CTL_KERN;
231 	mib[1] = KERN_BOOTTIME;
232 	len = sizeof btm;
233 	if (sysctl(mib, 2, &btm, &len, 0, 0) < 0) {
234 		syslog(LOG_ERR, "sysctl(kern.boottime): %m");
235 		exit(1);
236 	}
237 
238 	stats_all.s2.boottime.tv_sec = btm.tv_sec;
239 	stats_all.s2.boottime.tv_usec = btm.tv_usec;
240 
241 
242 #ifdef DEBUG
243 	fprintf(stderr, "%d %d %d %d\n", stats_all.s1.cp_time[0],
244 	    stats_all.s1.cp_time[1], stats_all.s1.cp_time[2], stats_all.s1.cp_time[3]);
245 #endif
246 
247 	/* XXX - should use sysctl */
248  	if (kvm_read(kd, (long)nl[X_CNT].n_value, (char *)&cnt, sizeof cnt) != sizeof cnt) {
249 		syslog(LOG_ERR, "rstat: can't read cnt from kmem");
250 		exit(1);
251 	}
252 	stats_all.s1.v_pgpgin = cnt.v_vnodepgsin;
253 	stats_all.s1.v_pgpgout = cnt.v_vnodepgsout;
254 	stats_all.s1.v_pswpin = cnt.v_swappgsin;
255 	stats_all.s1.v_pswpout = cnt.v_swappgsout;
256 	stats_all.s1.v_intr = cnt.v_intr;
257 	gettimeofday(&tm, (struct timezone *) 0);
258 	stats_all.s1.v_intr -= hz*(tm.tv_sec - btm.tv_sec) +
259 	    hz*(tm.tv_usec - btm.tv_usec)/1000000;
260 	stats_all.s2.v_swtch = cnt.v_swtch;
261 
262 	/* update disk transfers */
263 	updatexfers(RSTAT_DK_NDRIVE, stats_all.s1.dk_xfer);
264 
265 	mib[0] = CTL_NET;
266 	mib[1] = PF_LINK;
267 	mib[2] = NETLINK_GENERIC;
268 	mib[3] = IFMIB_SYSTEM;
269 	mib[4] = IFMIB_IFCOUNT;
270 	len = sizeof ifcount;
271 	if (sysctl(mib, 5, &ifcount, &len, 0, 0) < 0) {
272 		syslog(LOG_ERR, "sysctl(net.link.generic.system.ifcount): %m");
273 		exit(1);
274 	}
275 
276 	stats_all.s1.if_ipackets = 0;
277 	stats_all.s1.if_opackets = 0;
278 	stats_all.s1.if_ierrors = 0;
279 	stats_all.s1.if_oerrors = 0;
280 	stats_all.s1.if_collisions = 0;
281 	for (i = 1; i <= ifcount; i++) {
282 		len = sizeof ifmd;
283 		mib[3] = IFMIB_IFDATA;
284 		mib[4] = i;
285 		mib[5] = IFDATA_GENERAL;
286 		if (sysctl(mib, 6, &ifmd, &len, 0, 0) < 0) {
287 			if (errno == ENOENT)
288 				continue;
289 
290 			syslog(LOG_ERR, "sysctl(net.link.ifdata.%d.general)"
291 			       ": %m", i);
292 			exit(1);
293 		}
294 
295 		stats_all.s1.if_ipackets += ifmd.ifmd_data.ifi_ipackets;
296 		stats_all.s1.if_opackets += ifmd.ifmd_data.ifi_opackets;
297 		stats_all.s1.if_ierrors += ifmd.ifmd_data.ifi_ierrors;
298 		stats_all.s1.if_oerrors += ifmd.ifmd_data.ifi_oerrors;
299 		stats_all.s1.if_collisions += ifmd.ifmd_data.ifi_collisions;
300 	}
301 	gettimeofday((struct timeval *)&stats_all.s3.curtime,
302 		(struct timezone *) 0);
303 	alarm(1);
304 }
305 
306 void
307 setup()
308 {
309 	char errbuf[_POSIX2_LINE_MAX];
310 
311 	int en;
312 
313 	if ((kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf)) == NULL) {
314 		syslog(LOG_ERR, "rpc.rstatd, %s", errbuf);
315 		exit(1);
316 	}
317 
318 	if ((en = kvm_nlist(kd, nl)) != 0) {
319 		syslog(LOG_ERR, "rstatd: Can't get namelist. %d", en);
320 		exit (1);
321         }
322 }
323 
324 /*
325  * returns true if have a disk
326  */
327 int
328 haveadisk(void)
329 {
330 	register int i;
331 	struct statinfo stats;
332 	int num_devices, retval = 0;
333 
334 	if ((num_devices = devstat_getnumdevs(NULL)) < 0) {
335 		syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
336 		       devstat_errbuf);
337 		exit(1);
338 	}
339 
340 	if (devstat_checkversion(NULL) < 0) {
341 		syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
342 		exit(1);
343 	}
344 
345 	stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
346 	bzero(stats.dinfo, sizeof(struct devinfo));
347 
348 	if (devstat_getdevs(NULL, &stats) == -1) {
349 		syslog(LOG_ERR, "rstatd: can't get device list: %s",
350 		       devstat_errbuf);
351 		exit(1);
352 	}
353 	for (i = 0; i < stats.dinfo->numdevs; i++) {
354 		if (((stats.dinfo->devices[i].device_type
355 		      & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
356 		 && ((stats.dinfo->devices[i].device_type
357 		      & DEVSTAT_TYPE_PASS) == 0)) {
358 			retval = 1;
359 			break;
360 		}
361 	}
362 
363 	if (stats.dinfo->mem_ptr)
364 		free(stats.dinfo->mem_ptr);
365 
366 	free(stats.dinfo);
367 	return(retval);
368 }
369 
370 void
371 updatexfers(int numdevs, int *devs)
372 {
373 	register int i, j, k, t;
374 	struct statinfo stats;
375 	int num_devices = 0;
376 	u_int64_t total_transfers;
377 
378 	if ((num_devices = devstat_getnumdevs(NULL)) < 0) {
379 		syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
380 		       devstat_errbuf);
381 		exit(1);
382 	}
383 
384 	if (devstat_checkversion(NULL) < 0) {
385 		syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
386 		exit(1);
387 	}
388 
389 	stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
390 	bzero(stats.dinfo, sizeof(struct devinfo));
391 
392 	if (devstat_getdevs(NULL, &stats) == -1) {
393 		syslog(LOG_ERR, "rstatd: can't get device list: %s",
394 		       devstat_errbuf);
395 		exit(1);
396 	}
397 
398 	for (i = 0, j = 0; i < stats.dinfo->numdevs && j < numdevs; i++) {
399 		if (((stats.dinfo->devices[i].device_type
400 		      & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
401 		 && ((stats.dinfo->devices[i].device_type
402 		      & DEVSTAT_TYPE_PASS) == 0)) {
403 			total_transfers = 0;
404 			for (k = 0; k < DEVSTAT_N_TRANS_FLAGS; k++)
405 				total_transfers +=
406 				    stats.dinfo->devices[i].operations[k];
407 			/*
408 			 * XXX KDM If the total transfers for this device
409 			 * are greater than the amount we can fit in a
410 			 * signed integer, just set them to the maximum
411 			 * amount we can fit in a signed integer.  I have a
412 			 * feeling that the rstat protocol assumes 32-bit
413 			 * integers, so this could well break on a 64-bit
414 			 * architecture like the Alpha.
415 			 */
416 			if (total_transfers > INT_MAX)
417 				t = INT_MAX;
418 			else
419 				t = total_transfers;
420 			devs[j] = t;
421 			j++;
422 		}
423 	}
424 
425 	if (stats.dinfo->mem_ptr)
426 		free(stats.dinfo->mem_ptr);
427 
428 	free(stats.dinfo);
429 }
430 
431 void
432 rstat_service(struct svc_req *rqstp, SVCXPRT *transp)
433 {
434 	union {
435 		int fill;
436 	} argument;
437 	char *result;
438 	bool_t (*xdr_argument)(), (*xdr_result)();
439 	char *(*local)();
440 
441 	switch (rqstp->rq_proc) {
442 	case NULLPROC:
443 		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
444 		goto leave;
445 
446 	case RSTATPROC_STATS:
447 		xdr_argument = xdr_void;
448 		xdr_result = xdr_statstime;
449                 switch (rqstp->rq_vers) {
450                 case RSTATVERS_ORIG:
451                         local = (char *(*)()) rstatproc_stats_1_svc;
452                         break;
453                 case RSTATVERS_SWTCH:
454                         local = (char *(*)()) rstatproc_stats_2_svc;
455                         break;
456                 case RSTATVERS_TIME:
457                         local = (char *(*)()) rstatproc_stats_3_svc;
458                         break;
459                 default:
460                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
461                         goto leave;
462                         /*NOTREACHED*/
463                 }
464 		break;
465 
466 	case RSTATPROC_HAVEDISK:
467 		xdr_argument = xdr_void;
468 		xdr_result = xdr_u_int;
469                 switch (rqstp->rq_vers) {
470                 case RSTATVERS_ORIG:
471                         local = (char *(*)()) rstatproc_havedisk_1_svc;
472                         break;
473                 case RSTATVERS_SWTCH:
474                         local = (char *(*)()) rstatproc_havedisk_2_svc;
475                         break;
476                 case RSTATVERS_TIME:
477                         local = (char *(*)()) rstatproc_havedisk_3_svc;
478                         break;
479                 default:
480                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
481                         goto leave;
482                         /*NOTREACHED*/
483                 }
484 		break;
485 
486 	default:
487 		svcerr_noproc(transp);
488 		goto leave;
489 	}
490 	bzero((char *)&argument, sizeof(argument));
491 	if (!svc_getargs(transp, (xdrproc_t)xdr_argument, &argument)) {
492 		svcerr_decode(transp);
493 		goto leave;
494 	}
495 	result = (*local)(&argument, rqstp);
496 	if (result != NULL &&
497 	    !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
498 		svcerr_systemerr(transp);
499 	}
500 	if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, &argument))
501 		errx(1, "unable to free arguments");
502 leave:
503         if (from_inetd)
504                 exit(0);
505 }
506