libexec/rpc.rstatd/rstat_proc.c

   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  * @(#)rpc.rstatd.c 1.1 86/09/25 Copyr 1984 Sun Micro
  30  * @(#)rstat_proc.c     2.2 88/08/01 4.0 RPCSRC
  31  * $FreeBSD: src/libexec/rpc.rstatd/rstat_proc.c,v 1.14.2.1 2002/07/11 17:17:56 alfred Exp $
  32  */
  33
  34 /*
  35  * rstat service:  built with rstat.x and derived from rpc.rstatd.c
  36  *
  37  * Copyright (c) 1984 by Sun Microsystems, Inc.
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/socket.h>
  42 #include <sys/sysctl.h>
  43 #include <sys/time.h>
  44 #include <sys/vmmeter.h>
  45
  46 #include <err.h>
  47 #include <fcntl.h>
  48 #include <kinfo.h>
  49 #include <limits.h>
  50 #include <signal.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <syslog.h>
  55 #include <unistd.h>
  56 #include <devstat.h>
  57
  58 #include <net/if.h>
  59 #include <net/if_mib.h>
  60
  61 #undef FSHIFT                    /* Use protocol's shift and scale values */
  62 #undef FSCALE
  63 #undef if_ipackets
  64 #undef if_ierrors
  65 #undef if_opackets
  66 #undef if_oerrors
  67 #undef if_collisions
  68 #include <rpcsvc/rstat.h>
  69
  70 int haveadisk (void);
  71 void updatexfers (int, int *);
  72 void setup (void);
  73 int stats_service();
  74
  75 extern int from_inetd;
  76 int sincelastreq = 0;           /* number of alarms since last request */
  77 extern int closedown;
  78
  79 union {
  80     struct stats s1;
  81     struct statsswtch s2;
  82     struct statstime s3;
  83 } stats_all;
  84
  85 void updatestat();
  86 static int stat_is_init = 0;
  87
  88 #ifndef FSCALE
  89 #define FSCALE (1 << 8)
  90 #endif
  91
  92 void
  93 stat_init(void)
  94 {
  95     stat_is_init = 1;
  96     alarm(0);
  97     updatestat();
  98     (void) signal(SIGALRM, updatestat);
  99     alarm(1);
 100 }
 101
 102 statstime *
 103 rstatproc_stats_3_svc(void *argp, struct svc_req *rqstp)
 104 {
 105     if (! stat_is_init)
 106         stat_init();
 107     sincelastreq = 0;
 108     return(&stats_all.s3);
 109 }
 110
 111 statsswtch *
 112 rstatproc_stats_2_svc(void *argp, struct svc_req *rqstp)
 113 {
 114     if (! stat_is_init)
 115         stat_init();
 116     sincelastreq = 0;
 117     return(&stats_all.s2);
 118 }
 119
 120 stats *
 121 rstatproc_stats_1_svc(void *argp, struct svc_req *rqstp)
 122 {
 123     if (! stat_is_init)
 124         stat_init();
 125     sincelastreq = 0;
 126     return(&stats_all.s1);
 127 }
 128
 129 u_int *
 130 rstatproc_havedisk_3_svc(void *argp, struct svc_req *rqstp)
 131 {
 132     static u_int have;
 133
 134     if (! stat_is_init)
 135         stat_init();
 136     sincelastreq = 0;
 137     have = haveadisk();
 138         return(&have);
 139 }
 140
 141 u_int *
 142 rstatproc_havedisk_2_svc(void *argp, struct svc_req *rqstp)
 143 {
 144     return(rstatproc_havedisk_3_svc(argp, rqstp));
 145 }
 146
 147 u_int *
 148 rstatproc_havedisk_1_svc(void *argp, struct svc_req *rqstp)
 149 {
 150     return(rstatproc_havedisk_3_svc(argp, rqstp));
 151 }
 152
 153 void
 154 updatestat(void)
 155 {
 156         int i, hz;
 157         struct clockinfo clockrate;
 158         struct vmmeter vmm;
 159         size_t vmm_size = sizeof(vmm);
 160         struct ifmibdata ifmd;
 161         double avrun[3];
 162         struct timeval tm, btm;
 163         struct kinfo_cputime cp_time;
 164         int mib[6];
 165         size_t len;
 166         int ifcount;
 167
 168 #ifdef DEBUG
 169         fprintf(stderr, "entering updatestat\n");
 170 #endif
 171         if (sincelastreq >= closedown) {
 172 #ifdef DEBUG
 173                 fprintf(stderr, "about to closedown\n");
 174 #endif
 175                 if (from_inetd)
 176                         exit(0);
 177                 else {
 178                         stat_is_init = 0;
 179                         return;
 180                 }
 181         }
 182         sincelastreq++;
 183
 184         mib[0] = CTL_KERN;
 185         mib[1] = KERN_CLOCKRATE;
 186         len = sizeof clockrate;
 187         if (sysctl(mib, 2, &clockrate, &len, 0, 0) < 0) {
 188                 syslog(LOG_ERR, "sysctl(kern.clockrate): %m");
 189                 exit(1);
 190         }
 191         hz = clockrate.hz;
 192
 193         if (kinfo_get_sched_cputime(&cp_time)) {
 194                 syslog(LOG_ERR, "rstat: can't read cp_time from kmem");
 195                 exit(1);
 196         }
 197         stats_all.s1.cp_time[0] = cp_time.cp_user;
 198         stats_all.s1.cp_time[1] = cp_time.cp_nice;
 199         stats_all.s1.cp_time[2] = cp_time.cp_sys;
 200         stats_all.s1.cp_time[3] = cp_time.cp_idle;
 201
 202         (void)getloadavg(avrun, sizeof(avrun) / sizeof(avrun[0]));
 203
 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
 208         mib[0] = CTL_KERN;
 209         mib[1] = KERN_BOOTTIME;
 210         len = sizeof btm;
 211         if (sysctl(mib, 2, &btm, &len, 0, 0) < 0) {
 212                 syslog(LOG_ERR, "sysctl(kern.boottime): %m");
 213                 exit(1);
 214         }
 215
 216         stats_all.s2.boottime.tv_sec = btm.tv_sec;
 217         stats_all.s2.boottime.tv_usec = btm.tv_usec;
 218
 219
 220 #ifdef DEBUG
 221         fprintf(stderr, "%d %d %d %d\n", stats_all.s1.cp_time[0],
 222             stats_all.s1.cp_time[1], stats_all.s1.cp_time[2], stats_all.s1.cp_time[3]);
 223 #endif
 224
 225         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 226                 syslog(LOG_ERR, "sysctlbyname: vm.vmmeter");
 227                 exit(1);
 228         }
 229         stats_all.s1.v_pgpgin = vmm.v_vnodepgsin;
 230         stats_all.s1.v_pgpgout = vmm.v_vnodepgsout;
 231         stats_all.s1.v_pswpin = vmm.v_swappgsin;
 232         stats_all.s1.v_pswpout = vmm.v_swappgsout;
 233         stats_all.s1.v_intr = vmm.v_intr;
 234         gettimeofday(&tm, NULL);
 235         stats_all.s1.v_intr -= hz*(tm.tv_sec - btm.tv_sec) +
 236             hz*(tm.tv_usec - btm.tv_usec)/1000000;
 237         stats_all.s2.v_swtch = vmm.v_swtch;
 238
 239         /* update disk transfers */
 240         updatexfers(RSTAT_DK_NDRIVE, stats_all.s1.dk_xfer);
 241
 242         mib[0] = CTL_NET;
 243         mib[1] = PF_LINK;
 244         mib[2] = NETLINK_GENERIC;
 245         mib[3] = IFMIB_SYSTEM;
 246         mib[4] = IFMIB_IFCOUNT;
 247         len = sizeof ifcount;
 248         if (sysctl(mib, 5, &ifcount, &len, 0, 0) < 0) {
 249                 syslog(LOG_ERR, "sysctl(net.link.generic.system.ifcount): %m");
 250                 exit(1);
 251         }
 252
 253         stats_all.s1.if_ipackets = 0;
 254         stats_all.s1.if_opackets = 0;
 255         stats_all.s1.if_ierrors = 0;
 256         stats_all.s1.if_oerrors = 0;
 257         stats_all.s1.if_collisions = 0;
 258         for (i = 1; i <= ifcount; i++) {
 259                 len = sizeof ifmd;
 260                 mib[3] = IFMIB_IFDATA;
 261                 mib[4] = i;
 262                 mib[5] = IFDATA_GENERAL;
 263                 if (sysctl(mib, 6, &ifmd, &len, 0, 0) < 0) {
 264                         syslog(LOG_ERR, "sysctl(net.link.ifdata.%d.general)"
 265                                ": %m", i);
 266                         exit(1);
 267                 }
 268
 269                 stats_all.s1.if_ipackets += ifmd.ifmd_data.ifi_ipackets;
 270                 stats_all.s1.if_opackets += ifmd.ifmd_data.ifi_opackets;
 271                 stats_all.s1.if_ierrors += ifmd.ifmd_data.ifi_ierrors;
 272                 stats_all.s1.if_oerrors += ifmd.ifmd_data.ifi_oerrors;
 273                 stats_all.s1.if_collisions += ifmd.ifmd_data.ifi_collisions;
 274         }
 275         gettimeofday((struct timeval *)&stats_all.s3.curtime, NULL);
 276         alarm(1);
 277 }
 278
 279 /*
 280  * returns true if have a disk
 281  */
 282 int
 283 haveadisk(void)
 284 {
 285         register int i;
 286         struct statinfo stats;
 287         int num_devices, retval = 0;
 288
 289         if ((num_devices = getnumdevs()) < 0) {
 290                 syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
 291                        devstat_errbuf);
 292                 exit(1);
 293         }
 294
 295         if (checkversion() < 0) {
 296                 syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
 297                 exit(1);
 298         }
 299
 300         stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 301         bzero(stats.dinfo, sizeof(struct devinfo));
 302
 303         if (getdevs(&stats) == -1) {
 304                 syslog(LOG_ERR, "rstatd: can't get device list: %s",
 305                        devstat_errbuf);
 306                 exit(1);
 307         }
 308         for (i = 0; i < stats.dinfo->numdevs; i++) {
 309                 if (((stats.dinfo->devices[i].device_type
 310                       & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
 311                  && ((stats.dinfo->devices[i].device_type
 312                       & DEVSTAT_TYPE_PASS) == 0)) {
 313                         retval = 1;
 314                         break;
 315                 }
 316         }
 317
 318         if (stats.dinfo->mem_ptr)
 319                 free(stats.dinfo->mem_ptr);
 320
 321         free(stats.dinfo);
 322         return(retval);
 323 }
 324
 325 void
 326 updatexfers(int numdevs, int *devs)
 327 {
 328         register int i, j, t;
 329         struct statinfo stats;
 330         int num_devices = 0;
 331         u_int64_t total_transfers;
 332
 333         if ((num_devices = getnumdevs()) < 0) {
 334                 syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
 335                        devstat_errbuf);
 336                 exit(1);
 337         }
 338
 339         if (checkversion() < 0) {
 340                 syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
 341                 exit(1);
 342         }
 343
 344         stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 345         bzero(stats.dinfo, sizeof(struct devinfo));
 346
 347         if (getdevs(&stats) == -1) {
 348                 syslog(LOG_ERR, "rstatd: can't get device list: %s",
 349                        devstat_errbuf);
 350                 exit(1);
 351         }
 352
 353         for (i = 0, j = 0; i < stats.dinfo->numdevs && j < 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                         total_transfers = stats.dinfo->devices[i].num_reads +
 359                                           stats.dinfo->devices[i].num_writes +
 360                                           stats.dinfo->devices[i].num_other;
 361                         /*
 362                          * XXX KDM If the total transfers for this device
 363                          * are greater than the amount we can fit in a
 364                          * signed integer, just set them to the maximum
 365                          * amount we can fit in a signed integer.  I have a
 366                          * feeling that the rstat protocol assumes 32-bit
 367                          * integers, so this could well break on a 64-bit
 368                          * architecture like the Alpha.
 369                          */
 370                         if (total_transfers > INT_MAX)
 371                                 t = INT_MAX;
 372                         else
 373                                 t = total_transfers;
 374                         devs[j] = t;
 375                         j++;
 376                 }
 377         }
 378
 379         if (stats.dinfo->mem_ptr)
 380                 free(stats.dinfo->mem_ptr);
 381
 382         free(stats.dinfo);
 383 }
 384
 385 void
 386 rstat_service(struct svc_req *rqstp, SVCXPRT *transp)
 387 {
 388         union {
 389                 int fill;
 390         } argument;
 391         char *result;
 392         bool_t (*xdr_argument)(), (*xdr_result)();
 393         char *(*local)();
 394
 395         switch (rqstp->rq_proc) {
 396         case NULLPROC:
 397                 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
 398                 goto leave;
 399
 400         case RSTATPROC_STATS:
 401                 xdr_argument = xdr_void;
 402                 xdr_result = xdr_statstime;
 403                 switch (rqstp->rq_vers) {
 404                 case RSTATVERS_ORIG:
 405                         local = (char *(*)()) rstatproc_stats_1_svc;
 406                         break;
 407                 case RSTATVERS_SWTCH:
 408                         local = (char *(*)()) rstatproc_stats_2_svc;
 409                         break;
 410                 case RSTATVERS_TIME:
 411                         local = (char *(*)()) rstatproc_stats_3_svc;
 412                         break;
 413                 default:
 414                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
 415                         goto leave;
 416                         /*NOTREACHED*/
 417                 }
 418                 break;
 419
 420         case RSTATPROC_HAVEDISK:
 421                 xdr_argument = xdr_void;
 422                 xdr_result = xdr_u_int;
 423                 switch (rqstp->rq_vers) {
 424                 case RSTATVERS_ORIG:
 425                         local = (char *(*)()) rstatproc_havedisk_1_svc;
 426                         break;
 427                 case RSTATVERS_SWTCH:
 428                         local = (char *(*)()) rstatproc_havedisk_2_svc;
 429                         break;
 430                 case RSTATVERS_TIME:
 431                         local = (char *(*)()) rstatproc_havedisk_3_svc;
 432                         break;
 433                 default:
 434                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
 435                         goto leave;
 436                         /*NOTREACHED*/
 437                 }
 438                 break;
 439
 440         default:
 441                 svcerr_noproc(transp);
 442                 goto leave;
 443         }
 444         bzero((char *)&argument, sizeof(argument));
 445         if (!svc_getargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument)) {
 446                 svcerr_decode(transp);
 447                 goto leave;
 448         }
 449         result = (*local)(&argument, rqstp);
 450         if (result != NULL &&
 451             !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
 452                 svcerr_systemerr(transp);
 453         }
 454         if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument))
 455                 errx(1, "unable to free arguments");
 456 leave:
 457         if (from_inetd)
 458                 exit(0);
 459 }