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/*
31 * rstat service:  built with rstat.x and derived from rpc.rstatd.c
32 *
33 * Copyright (c) 1984 by Sun Microsystems, Inc.
34 */
35
36#include <sys/types.h>
37#include <sys/socket.h>
38#include <sys/sysctl.h>
39#include <sys/time.h>
40#include <sys/resource.h>
41#include <sys/param.h>
42
43#include <err.h>
44#include <errno.h>
45#include <fcntl.h>
46#include <limits.h>
47#include <signal.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <syslog.h>
52#include <unistd.h>
53#include <devstat.h>
54
55#include <net/if.h>
56#include <net/if_mib.h>
57
58#undef FSHIFT			 /* Use protocol's shift and scale values */
59#undef FSCALE
60#undef if_ipackets
61#undef if_ierrors
62#undef if_opackets
63#undef if_oerrors
64#undef if_collisions
65#include <rpcsvc/rstat.h>
66
67int haveadisk(void);
68void updatexfers(int, int *);
69int stats_service(void);
70
71extern int from_inetd;
72int sincelastreq = 0;		/* number of alarms since last request */
73extern int closedown;
74
75union {
76    struct stats s1;
77    struct statsswtch s2;
78    struct statstime s3;
79} stats_all;
80
81void updatestat();
82static int stat_is_init = 0;
83
84static int	cp_time_xlat[RSTAT_CPUSTATES] = { CP_USER, CP_NICE, CP_SYS,
85							CP_IDLE };
86static long	bsd_cp_time[CPUSTATES];
87
88
89#ifndef FSCALE
90#define FSCALE (1 << 8)
91#endif
92
93void
94stat_init(void)
95{
96    stat_is_init = 1;
97    alarm(0);
98    updatestat();
99    (void) signal(SIGALRM, updatestat);
100    alarm(1);
101}
102
103statstime *
104rstatproc_stats_3_svc(void *argp, struct svc_req *rqstp)
105{
106    if (! stat_is_init)
107        stat_init();
108    sincelastreq = 0;
109    return(&stats_all.s3);
110}
111
112statsswtch *
113rstatproc_stats_2_svc(void *argp, struct svc_req *rqstp)
114{
115    if (! stat_is_init)
116        stat_init();
117    sincelastreq = 0;
118    return(&stats_all.s2);
119}
120
121stats *
122rstatproc_stats_1_svc(void *argp, struct svc_req *rqstp)
123{
124    if (! stat_is_init)
125        stat_init();
126    sincelastreq = 0;
127    return(&stats_all.s1);
128}
129
130u_int *
131rstatproc_havedisk_3_svc(void *argp, struct svc_req *rqstp)
132{
133    static u_int have;
134
135    if (! stat_is_init)
136        stat_init();
137    sincelastreq = 0;
138    have = haveadisk();
139	return(&have);
140}
141
142u_int *
143rstatproc_havedisk_2_svc(void *argp, struct svc_req *rqstp)
144{
145    return(rstatproc_havedisk_3_svc(argp, rqstp));
146}
147
148u_int *
149rstatproc_havedisk_1_svc(void *argp, struct svc_req *rqstp)
150{
151    return(rstatproc_havedisk_3_svc(argp, rqstp));
152}
153
154void
155updatestat(void)
156{
157	int i, hz;
158	struct clockinfo clockrate;
159	struct ifmibdata ifmd;
160	double avrun[3];
161	struct timeval tm, btm;
162	int mib[6];
163	size_t len;
164	uint64_t val;
165	int ifcount;
166
167#ifdef DEBUG
168	fprintf(stderr, "entering updatestat\n");
169#endif
170	if (sincelastreq >= closedown) {
171#ifdef DEBUG
172                fprintf(stderr, "about to closedown\n");
173#endif
174                if (from_inetd)
175                        exit(0);
176                else {
177                        stat_is_init = 0;
178                        return;
179                }
180	}
181	sincelastreq++;
182
183	mib[0] = CTL_KERN;
184	mib[1] = KERN_CLOCKRATE;
185	len = sizeof clockrate;
186	if (sysctl(mib, 2, &clockrate, &len, 0, 0) < 0) {
187		syslog(LOG_ERR, "sysctl(kern.clockrate): %m");
188		exit(1);
189	}
190	hz = clockrate.hz;
191
192	len = sizeof(bsd_cp_time);
193	if (sysctlbyname("kern.cp_time", bsd_cp_time, &len, 0, 0) < 0) {
194		syslog(LOG_ERR, "sysctl(kern.cp_time): %m");
195		exit(1);
196	}
197	for(i = 0; i < RSTAT_CPUSTATES ; i++)
198		stats_all.s1.cp_time[i] = bsd_cp_time[cp_time_xlat[i]];
199
200        (void)getloadavg(avrun, sizeof(avrun) / sizeof(avrun[0]));
201
202	stats_all.s2.avenrun[0] = avrun[0] * FSCALE;
203	stats_all.s2.avenrun[1] = avrun[1] * FSCALE;
204	stats_all.s2.avenrun[2] = avrun[2] * FSCALE;
205
206	mib[0] = CTL_KERN;
207	mib[1] = KERN_BOOTTIME;
208	len = sizeof btm;
209	if (sysctl(mib, 2, &btm, &len, 0, 0) < 0) {
210		syslog(LOG_ERR, "sysctl(kern.boottime): %m");
211		exit(1);
212	}
213
214	stats_all.s2.boottime.tv_sec = btm.tv_sec;
215	stats_all.s2.boottime.tv_usec = btm.tv_usec;
216
217
218#ifdef DEBUG
219	fprintf(stderr, "%d %d %d %d\n", stats_all.s1.cp_time[0],
220	    stats_all.s1.cp_time[1], stats_all.s1.cp_time[2], stats_all.s1.cp_time[3]);
221#endif
222
223#define	FETCH_CNT(stat, cnt) do {					\
224	len = sizeof(uint64_t);						\
225	if (sysctlbyname("vm.stats." #cnt , &val, &len, NULL, 0) < 0) {	\
226		syslog(LOG_ERR, "sysctl(vm.stats." #cnt "): %m");	\
227		exit(1);						\
228	}								\
229	stat = val;							\
230} while (0)
231
232	FETCH_CNT(stats_all.s1.v_pgpgin, vm.v_vnodepgsin);
233	FETCH_CNT(stats_all.s1.v_pgpgout, vm.v_vnodepgsout);
234	FETCH_CNT(stats_all.s1.v_pswpin, vm.v_swappgsin);
235	FETCH_CNT(stats_all.s1.v_pswpout, vm.v_swappgsout);
236	FETCH_CNT(stats_all.s1.v_intr, sys.v_intr);
237	FETCH_CNT(stats_all.s2.v_swtch, sys.v_swtch);
238	(void)gettimeofday(&tm, NULL);
239	stats_all.s1.v_intr -= hz*(tm.tv_sec - btm.tv_sec) +
240	    hz*(tm.tv_usec - btm.tv_usec)/1000000;
241
242	/* update disk transfers */
243	updatexfers(RSTAT_DK_NDRIVE, stats_all.s1.dk_xfer);
244
245	mib[0] = CTL_NET;
246	mib[1] = PF_LINK;
247	mib[2] = NETLINK_GENERIC;
248	mib[3] = IFMIB_SYSTEM;
249	mib[4] = IFMIB_IFCOUNT;
250	len = sizeof ifcount;
251	if (sysctl(mib, 5, &ifcount, &len, 0, 0) < 0) {
252		syslog(LOG_ERR, "sysctl(net.link.generic.system.ifcount): %m");
253		exit(1);
254	}
255
256	stats_all.s1.if_ipackets = 0;
257	stats_all.s1.if_opackets = 0;
258	stats_all.s1.if_ierrors = 0;
259	stats_all.s1.if_oerrors = 0;
260	stats_all.s1.if_collisions = 0;
261	for (i = 1; i <= ifcount; i++) {
262		len = sizeof ifmd;
263		mib[3] = IFMIB_IFDATA;
264		mib[4] = i;
265		mib[5] = IFDATA_GENERAL;
266		if (sysctl(mib, 6, &ifmd, &len, 0, 0) < 0) {
267			if (errno == ENOENT)
268				continue;
269
270			syslog(LOG_ERR, "sysctl(net.link.ifdata.%d.general)"
271			       ": %m", i);
272			exit(1);
273		}
274
275		stats_all.s1.if_ipackets += ifmd.ifmd_data.ifi_ipackets;
276		stats_all.s1.if_opackets += ifmd.ifmd_data.ifi_opackets;
277		stats_all.s1.if_ierrors += ifmd.ifmd_data.ifi_ierrors;
278		stats_all.s1.if_oerrors += ifmd.ifmd_data.ifi_oerrors;
279		stats_all.s1.if_collisions += ifmd.ifmd_data.ifi_collisions;
280	}
281	(void)gettimeofday(&tm, NULL);
282	stats_all.s3.curtime.tv_sec = tm.tv_sec;
283	stats_all.s3.curtime.tv_usec = tm.tv_usec;
284	alarm(1);
285}
286
287/*
288 * returns true if have a disk
289 */
290int
291haveadisk(void)
292{
293	register int i;
294	struct statinfo stats;
295	int num_devices, retval = 0;
296
297	if ((num_devices = devstat_getnumdevs(NULL)) < 0) {
298		syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
299		       devstat_errbuf);
300		exit(1);
301	}
302
303	if (devstat_checkversion(NULL) < 0) {
304		syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
305		exit(1);
306	}
307
308	stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
309	bzero(stats.dinfo, sizeof(struct devinfo));
310
311	if (devstat_getdevs(NULL, &stats) == -1) {
312		syslog(LOG_ERR, "rstatd: can't get device list: %s",
313		       devstat_errbuf);
314		exit(1);
315	}
316	for (i = 0; i < stats.dinfo->numdevs; i++) {
317		if (((stats.dinfo->devices[i].device_type
318		      & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
319		 && ((stats.dinfo->devices[i].device_type
320		      & DEVSTAT_TYPE_PASS) == 0)) {
321			retval = 1;
322			break;
323		}
324	}
325
326	if (stats.dinfo->mem_ptr)
327		free(stats.dinfo->mem_ptr);
328
329	free(stats.dinfo);
330	return(retval);
331}
332
333void
334updatexfers(int numdevs, int *devs)
335{
336	register int i, j, k, t;
337	struct statinfo stats;
338	int num_devices = 0;
339	u_int64_t total_transfers;
340
341	if ((num_devices = devstat_getnumdevs(NULL)) < 0) {
342		syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
343		       devstat_errbuf);
344		exit(1);
345	}
346
347	if (devstat_checkversion(NULL) < 0) {
348		syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
349		exit(1);
350	}
351
352	stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
353	bzero(stats.dinfo, sizeof(struct devinfo));
354
355	if (devstat_getdevs(NULL, &stats) == -1) {
356		syslog(LOG_ERR, "rstatd: can't get device list: %s",
357		       devstat_errbuf);
358		exit(1);
359	}
360
361	for (i = 0, j = 0; i < stats.dinfo->numdevs && j < numdevs; i++) {
362		if (((stats.dinfo->devices[i].device_type
363		      & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
364		 && ((stats.dinfo->devices[i].device_type
365		      & DEVSTAT_TYPE_PASS) == 0)) {
366			total_transfers = 0;
367			for (k = 0; k < DEVSTAT_N_TRANS_FLAGS; k++)
368				total_transfers +=
369				    stats.dinfo->devices[i].operations[k];
370			/*
371			 * XXX KDM If the total transfers for this device
372			 * are greater than the amount we can fit in a
373			 * signed integer, just set them to the maximum
374			 * amount we can fit in a signed integer.  I have a
375			 * feeling that the rstat protocol assumes 32-bit
376			 * integers, so this could well break on a 64-bit
377			 * architecture like the Alpha.
378			 */
379			if (total_transfers > INT_MAX)
380				t = INT_MAX;
381			else
382				t = total_transfers;
383			devs[j] = t;
384			j++;
385		}
386	}
387
388	if (stats.dinfo->mem_ptr)
389		free(stats.dinfo->mem_ptr);
390
391	free(stats.dinfo);
392}
393
394void
395rstat_service(struct svc_req *rqstp, SVCXPRT *transp)
396{
397	union {
398		int fill;
399	} argument;
400	void *result;
401	xdrproc_t xdr_argument, xdr_result;
402	typedef void *(svc_cb)(void *arg, struct svc_req *rqstp);
403	svc_cb *local;
404
405	switch (rqstp->rq_proc) {
406	case NULLPROC:
407		(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
408		goto leave;
409
410	case RSTATPROC_STATS:
411		xdr_argument = (xdrproc_t)xdr_void;
412		xdr_result = (xdrproc_t)xdr_statstime;
413                switch (rqstp->rq_vers) {
414                case RSTATVERS_ORIG:
415                        local = (svc_cb *)rstatproc_stats_1_svc;
416                        break;
417                case RSTATVERS_SWTCH:
418                        local = (svc_cb *)rstatproc_stats_2_svc;
419                        break;
420                case RSTATVERS_TIME:
421                        local = (svc_cb *)rstatproc_stats_3_svc;
422                        break;
423                default:
424                        svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
425                        goto leave;
426                        /*NOTREACHED*/
427                }
428		break;
429
430	case RSTATPROC_HAVEDISK:
431		xdr_argument = (xdrproc_t)xdr_void;
432		xdr_result = (xdrproc_t)xdr_u_int;
433                switch (rqstp->rq_vers) {
434                case RSTATVERS_ORIG:
435                        local = (svc_cb *)rstatproc_havedisk_1_svc;
436                        break;
437                case RSTATVERS_SWTCH:
438                        local = (svc_cb *)rstatproc_havedisk_2_svc;
439                        break;
440                case RSTATVERS_TIME:
441                        local = (svc_cb *)rstatproc_havedisk_3_svc;
442                        break;
443                default:
444                        svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
445                        goto leave;
446                        /*NOTREACHED*/
447                }
448		break;
449
450	default:
451		svcerr_noproc(transp);
452		goto leave;
453	}
454	bzero((char *)&argument, sizeof(argument));
455	if (!svc_getargs(transp, xdr_argument, &argument)) {
456		svcerr_decode(transp);
457		goto leave;
458	}
459	result = (*local)(&argument, rqstp);
460	if (result != NULL &&
461	    !svc_sendreply(transp, xdr_result, result)) {
462		svcerr_systemerr(transp);
463	}
464	if (!svc_freeargs(transp, xdr_argument, &argument))
465		errx(1, "unable to free arguments");
466leave:
467        if (from_inetd)
468                exit(0);
469}
470