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  * $DragonFly: src/libexec/rpc.rstatd/rstat_proc.c,v 1.5 2005/01/31 21:20:58 joerg Exp $
  33  */
  34
  35 /*
  36  * rstat service:  built with rstat.x and derived from rpc.rstatd.c
  37  *
  38  * Copyright (c) 1984 by Sun Microsystems, Inc.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/kinfo.h>
  43 #include <sys/socket.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/time.h>
  46 #include <sys/vmmeter.h>
  47 #include <sys/param.h>
  48
  49 #include <err.h>
  50 #include <fcntl.h>
  51 #include <limits.h>
  52 #include <signal.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <syslog.h>
  57 #include <unistd.h>
  58 #include <devstat.h>
  59
  60 #include <net/if.h>
  61 #include <net/if_mib.h>
  62
  63 #undef FSHIFT                    /* Use protocol's shift and scale values */
  64 #undef FSCALE
  65 #undef if_ipackets
  66 #undef if_ierrors
  67 #undef if_opackets
  68 #undef if_oerrors
  69 #undef if_collisions
  70 #include <rpcsvc/rstat.h>
  71
  72 int haveadisk (void);
  73 void updatexfers (int, int *);
  74 void setup (void);
  75 int stats_service();
  76
  77 extern int from_inetd;
  78 int sincelastreq = 0;           /* number of alarms since last request */
  79 extern int closedown;
  80
  81 union {
  82     struct stats s1;
  83     struct statsswtch s2;
  84     struct statstime s3;
  85 } stats_all;
  86
  87 void updatestat();
  88 static stat_is_init = 0;
  89
  90 #ifndef FSCALE
  91 #define FSCALE (1 << 8)
  92 #endif
  93
  94 void
  95 stat_init()
  96 {
  97     stat_is_init = 1;
  98     alarm(0);
  99     updatestat();
 100     (void) signal(SIGALRM, updatestat);
 101     alarm(1);
 102 }
 103
 104 statstime *
 105 rstatproc_stats_3_svc(argp, rqstp)
 106     void                        *argp;
 107     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 *
 116 rstatproc_stats_2_svc(argp, rqstp)
 117     void                        *argp;
 118     struct svc_req              *rqstp;
 119 {
 120     if (! stat_is_init)
 121         stat_init();
 122     sincelastreq = 0;
 123     return(&stats_all.s2);
 124 }
 125
 126 stats *
 127 rstatproc_stats_1_svc(argp, rqstp)
 128     void                        *argp;
 129     struct svc_req              *rqstp;
 130 {
 131     if (! stat_is_init)
 132         stat_init();
 133     sincelastreq = 0;
 134     return(&stats_all.s1);
 135 }
 136
 137 u_int *
 138 rstatproc_havedisk_3_svc(argp, rqstp)
 139     void                        *argp;
 140     struct svc_req              *rqstp;
 141 {
 142     static u_int have;
 143
 144     if (! stat_is_init)
 145         stat_init();
 146     sincelastreq = 0;
 147     have = haveadisk();
 148         return(&have);
 149 }
 150
 151 u_int *
 152 rstatproc_havedisk_2_svc(argp, rqstp)
 153     void                        *argp;
 154     struct svc_req              *rqstp;
 155 {
 156     return(rstatproc_havedisk_3_svc(argp, rqstp));
 157 }
 158
 159 u_int *
 160 rstatproc_havedisk_1_svc(argp, rqstp)
 161     void                        *argp;
 162     struct svc_req              *rqstp;
 163 {
 164     return(rstatproc_havedisk_3_svc(argp, rqstp));
 165 }
 166
 167 void
 168 updatestat()
 169 {
 170         int i, hz;
 171         struct clockinfo clockrate;
 172         struct vmmeter vmm;
 173         size_t vmm_size = sizeof(vmm);
 174         struct ifmibdata ifmd;
 175         double avrun[3];
 176         struct timeval tm, btm;
 177         struct kinfo_cputime cp_time;
 178         int mib[6];
 179         size_t len;
 180         int ifcount;
 181
 182 #ifdef DEBUG
 183         fprintf(stderr, "entering updatestat\n");
 184 #endif
 185         if (sincelastreq >= closedown) {
 186 #ifdef DEBUG
 187                 fprintf(stderr, "about to closedown\n");
 188 #endif
 189                 if (from_inetd)
 190                         exit(0);
 191                 else {
 192                         stat_is_init = 0;
 193                         return;
 194                 }
 195         }
 196         sincelastreq++;
 197
 198         mib[0] = CTL_KERN;
 199         mib[1] = KERN_CLOCKRATE;
 200         len = sizeof clockrate;
 201         if (sysctl(mib, 2, &clockrate, &len, 0, 0) < 0) {
 202                 syslog(LOG_ERR, "sysctl(kern.clockrate): %m");
 203                 exit(1);
 204         }
 205         hz = clockrate.hz;
 206
 207         if (kinfo_get_sched_cputime(&cp_time)) {
 208                 syslog(LOG_ERR, "rstat: can't read cp_time from kmem");
 209                 exit(1);
 210         }
 211         stats_all.s1.cp_time[0] = cp_time.cp_user;
 212         stats_all.s1.cp_time[1] = cp_time.cp_nice;
 213         stats_all.s1.cp_time[2] = cp_time.cp_sys;
 214         stats_all.s1.cp_time[3] = cp_time.cp_idle;
 215
 216         (void)getloadavg(avrun, sizeof(avrun) / sizeof(avrun[0]));
 217
 218         stats_all.s2.avenrun[0] = avrun[0] * FSCALE;
 219         stats_all.s2.avenrun[1] = avrun[1] * FSCALE;
 220         stats_all.s2.avenrun[2] = avrun[2] * FSCALE;
 221
 222         mib[0] = CTL_KERN;
 223         mib[1] = KERN_BOOTTIME;
 224         len = sizeof btm;
 225         if (sysctl(mib, 2, &btm, &len, 0, 0) < 0) {
 226                 syslog(LOG_ERR, "sysctl(kern.boottime): %m");
 227                 exit(1);
 228         }
 229
 230         stats_all.s2.boottime.tv_sec = btm.tv_sec;
 231         stats_all.s2.boottime.tv_usec = btm.tv_usec;
 232
 233
 234 #ifdef DEBUG
 235         fprintf(stderr, "%d %d %d %d\n", stats_all.s1.cp_time[0],
 236             stats_all.s1.cp_time[1], stats_all.s1.cp_time[2], stats_all.s1.cp_time[3]);
 237 #endif
 238
 239         if (sysctlbyname("vm.vmmeter", &vmm, &vmm_size, NULL, 0)) {
 240                 syslog(LOG_ERR, "sysctlbyname: vm.vmmeter");
 241                 exit(1);
 242         }
 243         stats_all.s1.v_pgpgin = vmm.v_vnodepgsin;
 244         stats_all.s1.v_pgpgout = vmm.v_vnodepgsout;
 245         stats_all.s1.v_pswpin = vmm.v_swappgsin;
 246         stats_all.s1.v_pswpout = vmm.v_swappgsout;
 247         stats_all.s1.v_intr = vmm.v_intr;
 248         gettimeofday(&tm, NULL);
 249         stats_all.s1.v_intr -= hz*(tm.tv_sec - btm.tv_sec) +
 250             hz*(tm.tv_usec - btm.tv_usec)/1000000;
 251         stats_all.s2.v_swtch = vmm.v_swtch;
 252
 253         /* update disk transfers */
 254         updatexfers(RSTAT_DK_NDRIVE, stats_all.s1.dk_xfer);
 255
 256         mib[0] = CTL_NET;
 257         mib[1] = PF_LINK;
 258         mib[2] = NETLINK_GENERIC;
 259         mib[3] = IFMIB_SYSTEM;
 260         mib[4] = IFMIB_IFCOUNT;
 261         len = sizeof ifcount;
 262         if (sysctl(mib, 5, &ifcount, &len, 0, 0) < 0) {
 263                 syslog(LOG_ERR, "sysctl(net.link.generic.system.ifcount): %m");
 264                 exit(1);
 265         }
 266
 267         stats_all.s1.if_ipackets = 0;
 268         stats_all.s1.if_opackets = 0;
 269         stats_all.s1.if_ierrors = 0;
 270         stats_all.s1.if_oerrors = 0;
 271         stats_all.s1.if_collisions = 0;
 272         for (i = 1; i <= ifcount; i++) {
 273                 len = sizeof ifmd;
 274                 mib[3] = IFMIB_IFDATA;
 275                 mib[4] = i;
 276                 mib[5] = IFDATA_GENERAL;
 277                 if (sysctl(mib, 6, &ifmd, &len, 0, 0) < 0) {
 278                         syslog(LOG_ERR, "sysctl(net.link.ifdata.%d.general)"
 279                                ": %m", i);
 280                         exit(1);
 281                 }
 282
 283                 stats_all.s1.if_ipackets += ifmd.ifmd_data.ifi_ipackets;
 284                 stats_all.s1.if_opackets += ifmd.ifmd_data.ifi_opackets;
 285                 stats_all.s1.if_ierrors += ifmd.ifmd_data.ifi_ierrors;
 286                 stats_all.s1.if_oerrors += ifmd.ifmd_data.ifi_oerrors;
 287                 stats_all.s1.if_collisions += ifmd.ifmd_data.ifi_collisions;
 288         }
 289         gettimeofday((struct timeval *)&stats_all.s3.curtime, NULL);
 290         alarm(1);
 291 }
 292
 293 /*
 294  * returns true if have a disk
 295  */
 296 int
 297 haveadisk()
 298 {
 299         register int i;
 300         struct statinfo stats;
 301         int num_devices, retval = 0;
 302
 303         if ((num_devices = getnumdevs()) < 0) {
 304                 syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
 305                        devstat_errbuf);
 306                 exit(1);
 307         }
 308
 309         if (checkversion() < 0) {
 310                 syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
 311                 exit(1);
 312         }
 313
 314         stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 315         bzero(stats.dinfo, sizeof(struct devinfo));
 316
 317         if (getdevs(&stats) == -1) {
 318                 syslog(LOG_ERR, "rstatd: can't get device list: %s",
 319                        devstat_errbuf);
 320                 exit(1);
 321         }
 322         for (i = 0; i < stats.dinfo->numdevs; i++) {
 323                 if (((stats.dinfo->devices[i].device_type
 324                       & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
 325                  && ((stats.dinfo->devices[i].device_type
 326                       & DEVSTAT_TYPE_PASS) == 0)) {
 327                         retval = 1;
 328                         break;
 329                 }
 330         }
 331
 332         if (stats.dinfo->mem_ptr)
 333                 free(stats.dinfo->mem_ptr);
 334
 335         free(stats.dinfo);
 336         return(retval);
 337 }
 338
 339 void
 340 updatexfers(numdevs, devs)
 341         int numdevs, *devs;
 342 {
 343         register int i, j, t;
 344         struct statinfo stats;
 345         int num_devices = 0;
 346         u_int64_t total_transfers;
 347
 348         if ((num_devices = getnumdevs()) < 0) {
 349                 syslog(LOG_ERR, "rstatd: can't get number of devices: %s",
 350                        devstat_errbuf);
 351                 exit(1);
 352         }
 353
 354         if (checkversion() < 0) {
 355                 syslog(LOG_ERR, "rstatd: %s", devstat_errbuf);
 356                 exit(1);
 357         }
 358
 359         stats.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
 360         bzero(stats.dinfo, sizeof(struct devinfo));
 361
 362         if (getdevs(&stats) == -1) {
 363                 syslog(LOG_ERR, "rstatd: can't get device list: %s",
 364                        devstat_errbuf);
 365                 exit(1);
 366         }
 367
 368         for (i = 0, j = 0; i < stats.dinfo->numdevs && j < numdevs; i++) {
 369                 if (((stats.dinfo->devices[i].device_type
 370                       & DEVSTAT_TYPE_MASK) == DEVSTAT_TYPE_DIRECT)
 371                  && ((stats.dinfo->devices[i].device_type
 372                       & DEVSTAT_TYPE_PASS) == 0)) {
 373                         total_transfers = stats.dinfo->devices[i].num_reads +
 374                                           stats.dinfo->devices[i].num_writes +
 375                                           stats.dinfo->devices[i].num_other;
 376                         /*
 377                          * XXX KDM If the total transfers for this device
 378                          * are greater than the amount we can fit in a
 379                          * signed integer, just set them to the maximum
 380                          * amount we can fit in a signed integer.  I have a
 381                          * feeling that the rstat protocol assumes 32-bit
 382                          * integers, so this could well break on a 64-bit
 383                          * architecture like the Alpha.
 384                          */
 385                         if (total_transfers > INT_MAX)
 386                                 t = INT_MAX;
 387                         else
 388                                 t = total_transfers;
 389                         devs[j] = t;
 390                         j++;
 391                 }
 392         }
 393
 394         if (stats.dinfo->mem_ptr)
 395                 free(stats.dinfo->mem_ptr);
 396
 397         free(stats.dinfo);
 398 }
 399
 400 void
 401 rstat_service(rqstp, transp)
 402         struct svc_req *rqstp;
 403         SVCXPRT *transp;
 404 {
 405         union {
 406                 int fill;
 407         } argument;
 408         char *result;
 409         bool_t (*xdr_argument)(), (*xdr_result)();
 410         char *(*local)();
 411
 412         switch (rqstp->rq_proc) {
 413         case NULLPROC:
 414                 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
 415                 goto leave;
 416
 417         case RSTATPROC_STATS:
 418                 xdr_argument = xdr_void;
 419                 xdr_result = xdr_statstime;
 420                 switch (rqstp->rq_vers) {
 421                 case RSTATVERS_ORIG:
 422                         local = (char *(*)()) rstatproc_stats_1_svc;
 423                         break;
 424                 case RSTATVERS_SWTCH:
 425                         local = (char *(*)()) rstatproc_stats_2_svc;
 426                         break;
 427                 case RSTATVERS_TIME:
 428                         local = (char *(*)()) rstatproc_stats_3_svc;
 429                         break;
 430                 default:
 431                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
 432                         goto leave;
 433                         /*NOTREACHED*/
 434                 }
 435                 break;
 436
 437         case RSTATPROC_HAVEDISK:
 438                 xdr_argument = xdr_void;
 439                 xdr_result = xdr_u_int;
 440                 switch (rqstp->rq_vers) {
 441                 case RSTATVERS_ORIG:
 442                         local = (char *(*)()) rstatproc_havedisk_1_svc;
 443                         break;
 444                 case RSTATVERS_SWTCH:
 445                         local = (char *(*)()) rstatproc_havedisk_2_svc;
 446                         break;
 447                 case RSTATVERS_TIME:
 448                         local = (char *(*)()) rstatproc_havedisk_3_svc;
 449                         break;
 450                 default:
 451                         svcerr_progvers(transp, RSTATVERS_ORIG, RSTATVERS_TIME);
 452                         goto leave;
 453                         /*NOTREACHED*/
 454                 }
 455                 break;
 456
 457         default:
 458                 svcerr_noproc(transp);
 459                 goto leave;
 460         }
 461         bzero((char *)&argument, sizeof(argument));
 462         if (!svc_getargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument)) {
 463                 svcerr_decode(transp);
 464                 goto leave;
 465         }
 466         result = (*local)(&argument, rqstp);
 467         if (result != NULL &&
 468             !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
 469                 svcerr_systemerr(transp);
 470         }
 471         if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, (caddr_t)&argument))
 472                 errx(1, "unable to free arguments");
 473 leave:
 474         if (from_inetd)
 475                 exit(0);
 476 }