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
67 int cp_xlat[CPUSTATES] = { CP_USER, CP_NICE, CP_SYS, CP_IDLE };
68
69 extern int dk_ndrive; /* from dkstats.c */
70 extern struct _disk cur, last;
71 char *memf = NULL, *nlistf = NULL;
72 int hz;
73
74 extern int from_inetd;
75 int sincelastreq = 0; /* number of alarms since last request */
76 extern int closedown;
77
78 union {
79 struct stats s1;
80 struct statsswtch s2;
81 struct statstime s3;
82 } stats_all;
83
84 void updatestat(void);
85 void updatestatsig(int sig);
86 void setup(void);
87
88 volatile sig_atomic_t wantupdatestat;
89
90 static int stat_is_init = 0;
91
92 #ifndef FSCALE
93 #define FSCALE (1 << 8)
94 #endif
95
96 static void
stat_init(void)97 stat_init(void)
98 {
99 stat_is_init = 1;
100 setup();
101 updatestat();
102 (void) signal(SIGALRM, updatestatsig);
103 alarm(1);
104 }
105
106 statstime *
rstatproc_stats_3_svc(void * arg,struct svc_req * rqstp)107 rstatproc_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
115 statsswtch *
rstatproc_stats_2_svc(void * arg,struct svc_req * rqstp)116 rstatproc_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
124 stats *
rstatproc_stats_1_svc(void * arg,struct svc_req * rqstp)125 rstatproc_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
133 u_int *
rstatproc_havedisk_3_svc(void * arg,struct svc_req * rqstp)134 rstatproc_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
145 u_int *
rstatproc_havedisk_2_svc(void * arg,struct svc_req * rqstp)146 rstatproc_havedisk_2_svc(void *arg, struct svc_req *rqstp)
147 {
148 return (rstatproc_havedisk_3_svc(arg, rqstp));
149 }
150
151 u_int *
rstatproc_havedisk_1_svc(void * arg,struct svc_req * rqstp)152 rstatproc_havedisk_1_svc(void *arg, struct svc_req *rqstp)
153 {
154 return (rstatproc_havedisk_3_svc(arg, rqstp));
155 }
156
157 void
updatestatsig(int sig)158 updatestatsig(int sig)
159 {
160 wantupdatestat = 1;
161 }
162
163 void
updatestat(void)164 updatestat(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
267 void
setup(void)268 setup(void)
269 {
270 dkinit(0);
271 }
272
273 void rstat_service(struct svc_req *, SVCXPRT *);
274
275 void
rstat_service(struct svc_req * rqstp,SVCXPRT * transp)276 rstat_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