1/*	$OpenBSD: rstat_proc.c,v 1.38 2023/03/08 04:43:05 guenther Exp $	*/
2
3/*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 *     * Redistributions of source code must retain the above copyright
11 *       notice, this list of conditions and the following disclaimer.
12 *     * Redistributions in binary form must reproduce the above
13 *       copyright notice, this list of conditions and the following
14 *       disclaimer in the documentation and/or other materials
15 *       provided with the distribution.
16 *     * Neither the name of the "Oracle America, Inc." nor the names of its
17 *       contributors may be used to endorse or promote products derived
18 *       from this software without specific prior written permission.
19 *
20 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34/*
35 * rstat service:  built with rstat.x and derived from rpc.rstatd.c
36 */
37
38#include <sys/types.h>
39#include <sys/time.h>
40#include <sys/sched.h>
41#include <sys/socket.h>
42#include <sys/sysctl.h>
43#include <net/if.h>
44
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <signal.h>
49#include <syslog.h>
50#include <fcntl.h>
51#include <limits.h>
52#include <errno.h>
53#include <ifaddrs.h>
54#include "dkstats.h"
55
56#undef FSHIFT			 /* Use protocol's shift and scale values */
57#undef FSCALE
58#undef DK_NDRIVE
59#undef CPUSTATES
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	cp_xlat[CPUSTATES] = { CP_USER, CP_NICE, CP_SYS, CP_IDLE };
68
69extern int dk_ndrive;		/* from dkstats.c */
70extern struct _disk cur, last;
71char *memf = NULL, *nlistf = NULL;
72int hz;
73
74extern int from_inetd;
75int sincelastreq = 0;		/* number of alarms since last request */
76extern int closedown;
77
78union {
79	struct stats s1;
80	struct statsswtch s2;
81	struct statstime s3;
82} stats_all;
83
84void	updatestat(void);
85void	updatestatsig(int sig);
86void	setup(void);
87
88volatile sig_atomic_t wantupdatestat;
89
90static int stat_is_init = 0;
91
92#ifndef FSCALE
93#define FSCALE (1 << 8)
94#endif
95
96static void
97stat_init(void)
98{
99	stat_is_init = 1;
100	setup();
101	updatestat();
102	(void) signal(SIGALRM, updatestatsig);
103	alarm(1);
104}
105
106statstime *
107rstatproc_stats_3_svc(void *arg, struct svc_req *rqstp)
108{
109	if (!stat_is_init)
110		stat_init();
111	sincelastreq = 0;
112	return (&stats_all.s3);
113}
114
115statsswtch *
116rstatproc_stats_2_svc(void *arg, struct svc_req *rqstp)
117{
118	if (!stat_is_init)
119		stat_init();
120	sincelastreq = 0;
121	return (&stats_all.s2);
122}
123
124stats *
125rstatproc_stats_1_svc(void *arg, struct svc_req *rqstp)
126{
127	if (!stat_is_init)
128		stat_init();
129	sincelastreq = 0;
130	return (&stats_all.s1);
131}
132
133u_int *
134rstatproc_havedisk_3_svc(void *arg, struct svc_req *rqstp)
135{
136	static u_int have;
137
138	if (!stat_is_init)
139		stat_init();
140	sincelastreq = 0;
141	have = dk_ndrive != 0;
142	return (&have);
143}
144
145u_int *
146rstatproc_havedisk_2_svc(void *arg, struct svc_req *rqstp)
147{
148	return (rstatproc_havedisk_3_svc(arg, rqstp));
149}
150
151u_int *
152rstatproc_havedisk_1_svc(void *arg, struct svc_req *rqstp)
153{
154	return (rstatproc_havedisk_3_svc(arg, rqstp));
155}
156
157void
158updatestatsig(int sig)
159{
160	wantupdatestat = 1;
161}
162
163void
164updatestat(void)
165{
166	int i, mib[2], save_errno = errno;
167	struct uvmexp uvmexp;
168	size_t len;
169	struct if_data *ifdp;
170	struct ifaddrs *ifaddrs, *ifa;
171	double avrun[3];
172	struct timeval tm, btm;
173	long *cp_time = cur.cp_time;
174
175#ifdef DEBUG
176	syslog(LOG_DEBUG, "entering updatestat");
177#endif
178	if (sincelastreq >= closedown) {
179#ifdef DEBUG
180		syslog(LOG_DEBUG, "about to closedown");
181#endif
182		if (from_inetd)
183			_exit(0);
184		else {
185			stat_is_init = 0;
186			errno = save_errno;
187			return;
188		}
189	}
190	sincelastreq++;
191
192	/*
193	 * dkreadstats reads in the "disk_count" as well as the "disklist"
194	 * statistics.  It also retrieves "hz" and the "cp_time" array.
195	 */
196	dkreadstats();
197	memset(stats_all.s1.dk_xfer, '\0', sizeof(stats_all.s1.dk_xfer));
198	for (i = 0; i < dk_ndrive && i < DK_NDRIVE; i++)
199		stats_all.s1.dk_xfer[i] = cur.dk_rxfer[i] + cur.dk_wxfer[i];
200
201	for (i = 0; i < CPUSTATES; i++)
202		stats_all.s1.cp_time[i] = cp_time[cp_xlat[i]];
203	(void)getloadavg(avrun, sizeof(avrun) / sizeof(avrun[0]));
204	stats_all.s2.avenrun[0] = avrun[0] * FSCALE;
205	stats_all.s2.avenrun[1] = avrun[1] * FSCALE;
206	stats_all.s2.avenrun[2] = avrun[2] * FSCALE;
207	mib[0] = CTL_KERN;
208	mib[1] = KERN_BOOTTIME;
209	len = sizeof(btm);
210	if (sysctl(mib, 2, &btm, &len, NULL, 0) == -1) {
211		syslog(LOG_ERR, "can't sysctl kern.boottime: %m");
212		_exit(1);
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	syslog(LOG_DEBUG, "%d %d %d %d", stats_all.s1.cp_time[0],
220	    stats_all.s1.cp_time[1], stats_all.s1.cp_time[2],
221	    stats_all.s1.cp_time[3]);
222#endif
223
224	mib[0] = CTL_VM;
225	mib[1] = VM_UVMEXP;
226	len = sizeof(uvmexp);
227	if (sysctl(mib, 2, &uvmexp, &len, NULL, 0) == -1) {
228		syslog(LOG_ERR, "can't sysctl vm.uvmexp: %m");
229		_exit(1);
230	}
231	stats_all.s1.v_pgpgin = uvmexp.fltanget;
232	stats_all.s1.v_pgpgout = uvmexp.pdpageouts;
233	stats_all.s1.v_pswpin = 0;
234	stats_all.s1.v_pswpout = 0;
235	stats_all.s1.v_intr = uvmexp.intrs;
236	stats_all.s2.v_swtch = uvmexp.swtch;
237	gettimeofday(&tm, NULL);
238	stats_all.s1.v_intr -= hz*(tm.tv_sec - btm.tv_sec) +
239	    hz*(tm.tv_usec - btm.tv_usec)/1000000;
240	stats_all.s1.if_ipackets = 0;
241	stats_all.s1.if_opackets = 0;
242	stats_all.s1.if_ierrors = 0;
243	stats_all.s1.if_oerrors = 0;
244	stats_all.s1.if_collisions = 0;
245	if (getifaddrs(&ifaddrs) == -1) {
246		syslog(LOG_ERR, "can't getifaddrs: %m");
247		_exit(1);
248	}
249	for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
250		if (ifa->ifa_addr->sa_family != AF_LINK)
251			continue;
252		ifdp = (struct if_data *)ifa->ifa_data;
253		stats_all.s1.if_ipackets += ifdp->ifi_ipackets;
254		stats_all.s1.if_opackets += ifdp->ifi_opackets;
255		stats_all.s1.if_ierrors += ifdp->ifi_ierrors;
256		stats_all.s1.if_oerrors += ifdp->ifi_oerrors;
257		stats_all.s1.if_collisions += ifdp->ifi_collisions;
258	}
259	freeifaddrs(ifaddrs);
260	stats_all.s3.curtime.tv_sec = tm.tv_sec;
261	stats_all.s3.curtime.tv_usec = tm.tv_usec;
262
263	alarm(1);
264	errno = save_errno;
265}
266
267void
268setup(void)
269{
270	dkinit(0);
271}
272
273void	rstat_service(struct svc_req *, SVCXPRT *);
274
275void
276rstat_service(struct svc_req *rqstp, SVCXPRT *transp)
277{
278	char *(*local)(void *, struct svc_req *);
279	xdrproc_t xdr_argument, xdr_result;
280	union {
281		int fill;
282	} argument;
283	char *result;
284
285	switch (rqstp->rq_proc) {
286	case NULLPROC:
287		(void)svc_sendreply(transp, xdr_void, (char *)NULL);
288		return;
289
290	case RSTATPROC_STATS:
291		xdr_argument = (xdrproc_t)xdr_void;
292		xdr_result = (xdrproc_t)xdr_statstime;
293		switch (rqstp->rq_vers) {
294		case RSTATVERS_ORIG:
295			local = (char *(*)(void *, struct svc_req *))
296				rstatproc_stats_1_svc;
297			break;
298		case RSTATVERS_SWTCH:
299			local = (char *(*)(void *, struct svc_req *))
300				rstatproc_stats_2_svc;
301			break;
302		case RSTATVERS_TIME:
303			local = (char *(*)(void *, struct svc_req *))
304				rstatproc_stats_3_svc;
305			break;
306		default:
307			svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
308			return;
309		}
310		break;
311
312	case RSTATPROC_HAVEDISK:
313		xdr_argument = (xdrproc_t)xdr_void;
314		xdr_result = (xdrproc_t)xdr_u_int;
315		switch (rqstp->rq_vers) {
316		case RSTATVERS_ORIG:
317			local = (char *(*)(void *, struct svc_req *))
318				rstatproc_havedisk_1_svc;
319			break;
320		case RSTATVERS_SWTCH:
321			local = (char *(*)(void *, struct svc_req *))
322				rstatproc_havedisk_2_svc;
323			break;
324		case RSTATVERS_TIME:
325			local = (char *(*)(void *, struct svc_req *))
326				rstatproc_havedisk_3_svc;
327			break;
328		default:
329			svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
330			return;
331		}
332		break;
333
334	default:
335		svcerr_noproc(transp);
336		return;
337	}
338	memset(&argument, 0, sizeof(argument));
339	if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) {
340		svcerr_decode(transp);
341		return;
342	}
343	result = (*local)(&argument, rqstp);
344	if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
345		svcerr_systemerr(transp);
346	}
347	if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument)) {
348		syslog(LOG_ERR, "unable to free arguments");
349		exit(1);
350	}
351}
352