src/disk.c

   1 /**
   2  * collectd - src/disk.c
   3  * Copyright (C) 2005-2007  Florian octo Forster
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; only version 2 of the License is applicable.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  17  *
  18  * Authors:
  19  *   Florian octo Forster <octo at verplant.org>
  20  **/
  21
  22 #include "collectd.h"
  23 #include "common.h"
  24 #include "plugin.h"
  25
  26 #if HAVE_MACH_MACH_TYPES_H
  27 #  include <mach/mach_types.h>
  28 #endif
  29 #if HAVE_MACH_MACH_INIT_H
  30 #  include <mach/mach_init.h>
  31 #endif
  32 #if HAVE_MACH_MACH_ERROR_H
  33 #  include <mach/mach_error.h>
  34 #endif
  35 #if HAVE_MACH_MACH_PORT_H
  36 #  include <mach/mach_port.h>
  37 #endif
  38 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
  39 #  include <CoreFoundation/CoreFoundation.h>
  40 #endif
  41 #if HAVE_IOKIT_IOKITLIB_H
  42 #  include <IOKit/IOKitLib.h>
  43 #endif
  44 #if HAVE_IOKIT_IOTYPES_H
  45 #  include <IOKit/IOTypes.h>
  46 #endif
  47 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
  48 #  include <IOKit/storage/IOBlockStorageDriver.h>
  49 #endif
  50 #if HAVE_IOKIT_IOBSD_H
  51 #  include <IOKit/IOBSD.h>
  52 #endif
  53
  54 #if HAVE_LIMITS_H
  55 # include <limits.h>
  56 #endif
  57 #ifndef UINT_MAX
  58 #  define UINT_MAX 4294967295U
  59 #endif
  60
  61 #if HAVE_IOKIT_IOKITLIB_H || KERNEL_LINUX || HAVE_LIBKSTAT
  62 # define DISK_HAVE_READ 1
  63 #else
  64 # define DISK_HAVE_READ 0
  65 #endif
  66
  67 #if DISK_HAVE_READ
  68 #if HAVE_IOKIT_IOKITLIB_H
  69 static mach_port_t io_master_port = MACH_PORT_NULL;
  70 /* #endif HAVE_IOKIT_IOKITLIB_H */
  71
  72 #elif KERNEL_LINUX
  73 typedef struct diskstats
  74 {
  75         char *name;
  76
  77         /* This overflows in roughly 1361 years */
  78         unsigned int poll_count;
  79
  80         counter_t read_sectors;
  81         counter_t write_sectors;
  82
  83         counter_t read_bytes;
  84         counter_t write_bytes;
  85
  86         counter_t read_ops;
  87         counter_t write_ops;
  88         counter_t read_time;
  89         counter_t write_time;
  90
  91         counter_t avg_read_time;
  92         counter_t avg_write_time;
  93
  94         struct diskstats *next;
  95 } diskstats_t;
  96
  97 static diskstats_t *disklist;
  98 /* #endif KERNEL_LINUX */
  99
 100 #elif HAVE_LIBKSTAT
 101 #define MAX_NUMDISK 256
 102 extern kstat_ctl_t *kc;
 103 static kstat_t *ksp[MAX_NUMDISK];
 104 static int numdisk = 0;
 105 #endif /* HAVE_LIBKSTAT */
 106
 107 static int disk_init (void)
 108 {
 109 #if HAVE_IOKIT_IOKITLIB_H
 110         kern_return_t status;
 111
 112         if (io_master_port != MACH_PORT_NULL)
 113         {
 114                 mach_port_deallocate (mach_task_self (),
 115                                 io_master_port);
 116                 io_master_port = MACH_PORT_NULL;
 117         }
 118
 119         status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
 120         if (status != kIOReturnSuccess)
 121         {
 122                 ERROR ("IOMasterPort failed: %s",
 123                                 mach_error_string (status));
 124                 io_master_port = MACH_PORT_NULL;
 125                 return (-1);
 126         }
 127 /* #endif HAVE_IOKIT_IOKITLIB_H */
 128
 129 #elif KERNEL_LINUX
 130         /* do nothing */
 131 /* #endif KERNEL_LINUX */
 132
 133 #elif HAVE_LIBKSTAT
 134         kstat_t *ksp_chain;
 135
 136         numdisk = 0;
 137
 138         if (kc == NULL)
 139                 return (-1);
 140
 141         for (numdisk = 0, ksp_chain = kc->kc_chain;
 142                         (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
 143                         ksp_chain = ksp_chain->ks_next)
 144         {
 145                 if (strncmp (ksp_chain->ks_class, "disk", 4)
 146                                 && strncmp (ksp_chain->ks_class, "partition", 9))
 147                         continue;
 148                 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
 149                         continue;
 150                 ksp[numdisk++] = ksp_chain;
 151         }
 152 #endif /* HAVE_LIBKSTAT */
 153
 154         return (0);
 155 } /* int disk_init */
 156
 157 static void disk_submit (const char *plugin_instance,
 158                 const char *type,
 159                 counter_t read, counter_t write)
 160 {
 161         value_t values[2];
 162         value_list_t vl = VALUE_LIST_INIT;
 163
 164         values[0].counter = read;
 165         values[1].counter = write;
 166
 167         vl.values = values;
 168         vl.values_len = 2;
 169         vl.time = time (NULL);
 170         strcpy (vl.host, hostname_g);
 171         strcpy (vl.plugin, "disk");
 172         strncpy (vl.plugin_instance, plugin_instance,
 173                         sizeof (vl.plugin_instance));
 174
 175         plugin_dispatch_values (type, &vl);
 176 } /* void disk_submit */
 177
 178 #if HAVE_IOKIT_IOKITLIB_H
 179 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
 180 {
 181         signed long long val_int;
 182         CFNumberRef      val_obj;
 183         CFStringRef      key_obj;
 184
 185         /* `key_obj' needs to be released. */
 186         key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
 187                         kCFStringEncodingASCII);
 188         if (key_obj == NULL)
 189         {
 190                 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
 191                 return (-1LL);
 192         }
 193
 194         /* get => we don't need to release (== free) the object */
 195         val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
 196
 197         CFRelease (key_obj);
 198
 199         if (val_obj == NULL)
 200         {
 201                 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
 202                 return (-1LL);
 203         }
 204
 205         if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
 206         {
 207                 DEBUG ("CFNumberGetValue (%s) failed.", key);
 208                 return (-1LL);
 209         }
 210
 211         return (val_int);
 212 }
 213 #endif /* HAVE_IOKIT_IOKITLIB_H */
 214
 215 static int disk_read (void)
 216 {
 217 #if HAVE_IOKIT_IOKITLIB_H
 218         io_registry_entry_t     disk;
 219         io_registry_entry_t     disk_child;
 220         io_iterator_t           disk_list;
 221         CFDictionaryRef         props_dict;
 222         CFDictionaryRef         stats_dict;
 223         CFDictionaryRef         child_dict;
 224         kern_return_t           status;
 225
 226         signed long long read_ops;
 227         signed long long read_byt;
 228         signed long long read_tme;
 229         signed long long write_ops;
 230         signed long long write_byt;
 231         signed long long write_tme;
 232
 233         int  disk_major;
 234         int  disk_minor;
 235         char disk_name[64];
 236
 237         static complain_t complain_obj;
 238
 239         /* Get the list of all disk objects. */
 240         if (IOServiceGetMatchingServices (io_master_port,
 241                                 IOServiceMatching (kIOBlockStorageDriverClass),
 242                                 &disk_list) != kIOReturnSuccess)
 243         {
 244                 plugin_complain (LOG_ERR, &complain_obj, "disk plugin: "
 245                                 "IOServiceGetMatchingServices failed.");
 246                 return (-1);
 247         }
 248         else if (complain_obj.interval != 0)
 249         {
 250                 plugin_relief (LOG_NOTICE, &complain_obj, "disk plugin: "
 251                                 "IOServiceGetMatchingServices succeeded.");
 252         }
 253
 254         while ((disk = IOIteratorNext (disk_list)) != 0)
 255         {
 256                 props_dict = NULL;
 257                 stats_dict = NULL;
 258                 child_dict = NULL;
 259
 260                 /* `disk_child' must be released */
 261                 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child))
 262                                 != kIOReturnSuccess)
 263                 {
 264                         /* This fails for example for DVD/CD drives.. */
 265                         DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
 266                         IOObjectRelease (disk);
 267                         continue;
 268                 }
 269
 270                 /* We create `props_dict' => we need to release it later */
 271                 if (IORegistryEntryCreateCFProperties (disk,
 272                                         (CFMutableDictionaryRef *) &props_dict,
 273                                         kCFAllocatorDefault,
 274                                         kNilOptions)
 275                                 != kIOReturnSuccess)
 276                 {
 277                         ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
 278                         IOObjectRelease (disk_child);
 279                         IOObjectRelease (disk);
 280                         continue;
 281                 }
 282
 283                 if (props_dict == NULL)
 284                 {
 285                         DEBUG ("IORegistryEntryCreateCFProperties (disk) failed.");
 286                         IOObjectRelease (disk_child);
 287                         IOObjectRelease (disk);
 288                         continue;
 289                 }
 290
 291                 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict,
 292                                 CFSTR (kIOBlockStorageDriverStatisticsKey));
 293
 294                 if (stats_dict == NULL)
 295                 {
 296                         DEBUG ("CFDictionaryGetValue (%s) failed.",
 297                                         kIOBlockStorageDriverStatisticsKey);
 298                         CFRelease (props_dict);
 299                         IOObjectRelease (disk_child);
 300                         IOObjectRelease (disk);
 301                         continue;
 302                 }
 303
 304                 if (IORegistryEntryCreateCFProperties (disk_child,
 305                                         (CFMutableDictionaryRef *) &child_dict,
 306                                         kCFAllocatorDefault,
 307                                         kNilOptions)
 308                                 != kIOReturnSuccess)
 309                 {
 310                         DEBUG ("IORegistryEntryCreateCFProperties (disk_child) failed.");
 311                         IOObjectRelease (disk_child);
 312                         CFRelease (props_dict);
 313                         IOObjectRelease (disk);
 314                         continue;
 315                 }
 316
 317                 /* kIOBSDNameKey */
 318                 disk_major = (int) dict_get_value (child_dict,
 319                                 kIOBSDMajorKey);
 320                 disk_minor = (int) dict_get_value (child_dict,
 321                                 kIOBSDMinorKey);
 322                 read_ops  = dict_get_value (stats_dict,
 323                                 kIOBlockStorageDriverStatisticsReadsKey);
 324                 read_byt  = dict_get_value (stats_dict,
 325                                 kIOBlockStorageDriverStatisticsBytesReadKey);
 326                 read_tme  = dict_get_value (stats_dict,
 327                                 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
 328                 write_ops = dict_get_value (stats_dict,
 329                                 kIOBlockStorageDriverStatisticsWritesKey);
 330                 write_byt = dict_get_value (stats_dict,
 331                                 kIOBlockStorageDriverStatisticsBytesWrittenKey);
 332                 /* This property describes the number of nanoseconds spent
 333                  * performing writes since the block storage driver was
 334                  * instantiated. It is one of the statistic entries listed
 335                  * under the top-level kIOBlockStorageDriverStatisticsKey
 336                  * property table. It has an OSNumber value. */
 337                 write_tme = dict_get_value (stats_dict,
 338                                 kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
 339
 340                 if (snprintf (disk_name, 64, "%i-%i", disk_major, disk_minor) >= 64)
 341                 {
 342                         DEBUG ("snprintf (major, minor) failed.");
 343                         CFRelease (child_dict);
 344                         IOObjectRelease (disk_child);
 345                         CFRelease (props_dict);
 346                         IOObjectRelease (disk);
 347                         continue;
 348                 }
 349                 DEBUG ("disk_name = %s", disk_name);
 350
 351                 if ((read_byt != -1LL) || (write_byt != -1LL))
 352                         disk_submit (disk_name, "disk_octets", read_byt, write_byt);
 353                 if ((read_ops != -1LL) || (write_ops != -1LL))
 354                         disk_submit (disk_name, "disk_ops", read_ops, write_ops);
 355                 if ((read_tme != -1LL) || (write_tme != -1LL))
 356                         disk_submit (disk_name, "disk_time",
 357                                         read_tme / 1000,
 358                                         write_tme / 1000);
 359
 360                 CFRelease (child_dict);
 361                 IOObjectRelease (disk_child);
 362                 CFRelease (props_dict);
 363                 IOObjectRelease (disk);
 364         }
 365         IOObjectRelease (disk_list);
 366 /* #endif HAVE_IOKIT_IOKITLIB_H */
 367
 368 #elif KERNEL_LINUX
 369         FILE *fh;
 370         char buffer[1024];
 371
 372         char *fields[32];
 373         int numfields;
 374         int fieldshift = 0;
 375
 376         int major = 0;
 377         int minor = 0;
 378
 379         counter_t read_sectors  = 0;
 380         counter_t write_sectors = 0;
 381
 382         counter_t read_ops      = 0;
 383         counter_t read_merged   = 0;
 384         counter_t read_time     = 0;
 385         counter_t write_ops     = 0;
 386         counter_t write_merged  = 0;
 387         counter_t write_time    = 0;
 388         int is_disk = 0;
 389
 390         diskstats_t *ds, *pre_ds;
 391
 392         static complain_t complain_obj;
 393
 394         if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
 395         {
 396                 if ((fh = fopen ("/proc/partitions", "r")) == NULL)
 397                 {
 398                         plugin_complain (LOG_ERR, &complain_obj,
 399                                         "disk plugin: Failed to open /proc/"
 400                                         "{diskstats,partitions}.");
 401                         return (-1);
 402                 }
 403
 404                 /* Kernel is 2.4.* */
 405                 fieldshift = 1;
 406         }
 407
 408         plugin_relief (LOG_NOTICE, &complain_obj, "disk plugin: "
 409                         "Succeeded to open /proc/{diskstats,partitions}.");
 410
 411         while (fgets (buffer, sizeof (buffer), fh) != NULL)
 412         {
 413                 char *disk_name;
 414
 415                 numfields = strsplit (buffer, fields, 32);
 416
 417                 if ((numfields != (14 + fieldshift)) && (numfields != 7))
 418                         continue;
 419
 420                 major = atoll (fields[0]);
 421                 minor = atoll (fields[1]);
 422
 423                 disk_name = fields[2];
 424
 425                 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
 426                         if (strcmp (disk_name, ds->name) == 0)
 427                                 break;
 428
 429                 if (ds == NULL)
 430                 {
 431                         if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
 432                                 continue;
 433
 434                         if ((ds->name = strdup (disk_name)) == NULL)
 435                         {
 436                                 free (ds);
 437                                 continue;
 438                         }
 439
 440                         if (pre_ds == NULL)
 441                                 disklist = ds;
 442                         else
 443                                 pre_ds->next = ds;
 444                 }
 445
 446                 is_disk = 0;
 447                 if (numfields == 7)
 448                 {
 449                         /* Kernel 2.6, Partition */
 450                         read_ops      = atoll (fields[3]);
 451                         read_sectors  = atoll (fields[4]);
 452                         write_ops     = atoll (fields[5]);
 453                         write_sectors = atoll (fields[6]);
 454                 }
 455                 else if (numfields == (14 + fieldshift))
 456                 {
 457                         read_ops  =  atoll (fields[3 + fieldshift]);
 458                         write_ops =  atoll (fields[7 + fieldshift]);
 459
 460                         read_sectors  = atoll (fields[5 + fieldshift]);
 461                         write_sectors = atoll (fields[9 + fieldshift]);
 462
 463                         if ((fieldshift == 0) || (minor == 0))
 464                         {
 465                                 is_disk = 1;
 466                                 read_merged  = atoll (fields[4 + fieldshift]);
 467                                 read_time    = atoll (fields[6 + fieldshift]);
 468                                 write_merged = atoll (fields[8 + fieldshift]);
 469                                 write_time   = atoll (fields[10+ fieldshift]);
 470                         }
 471                 }
 472                 else
 473                 {
 474                         DEBUG ("numfields = %i; => unknown file format.", numfields);
 475                         continue;
 476                 }
 477
 478                 {
 479                         counter_t diff_read_sectors;
 480                         counter_t diff_write_sectors;
 481
 482                 /* If the counter wraps around, it's only 32 bits.. */
 483                         if (read_sectors < ds->read_sectors)
 484                                 diff_read_sectors = 1 + read_sectors
 485                                         + (UINT_MAX - ds->read_sectors);
 486                         else
 487                                 diff_read_sectors = read_sectors - ds->read_sectors;
 488                         if (write_sectors < ds->write_sectors)
 489                                 diff_write_sectors = 1 + write_sectors
 490                                         + (UINT_MAX - ds->write_sectors);
 491                         else
 492                                 diff_write_sectors = write_sectors - ds->write_sectors;
 493
 494                         ds->read_bytes += 512 * diff_read_sectors;
 495                         ds->write_bytes += 512 * diff_write_sectors;
 496                         ds->read_sectors = read_sectors;
 497                         ds->write_sectors = write_sectors;
 498                 }
 499
 500                 /* Calculate the average time an io-op needs to complete */
 501                 if (is_disk)
 502                 {
 503                         counter_t diff_read_ops;
 504                         counter_t diff_write_ops;
 505                         counter_t diff_read_time;
 506                         counter_t diff_write_time;
 507
 508                         if (read_ops < ds->read_ops)
 509                                 diff_read_ops = 1 + read_ops
 510                                         + (UINT_MAX - ds->read_ops);
 511                         else
 512                                 diff_read_ops = read_ops - ds->read_ops;
 513                         DEBUG ("disk plugin: disk_name = %s; read_ops = %llu; "
 514                                         "ds->read_ops = %llu; diff_read_ops = %llu;",
 515                                         disk_name,
 516                                         read_ops, ds->read_ops, diff_read_ops);
 517
 518                         if (write_ops < ds->write_ops)
 519                                 diff_write_ops = 1 + write_ops
 520                                         + (UINT_MAX - ds->write_ops);
 521                         else
 522                                 diff_write_ops = write_ops - ds->write_ops;
 523
 524                         if (read_time < ds->read_time)
 525                                 diff_read_time = 1 + read_time
 526                                         + (UINT_MAX - ds->read_time);
 527                         else
 528                                 diff_read_time = read_time - ds->read_time;
 529
 530                         if (write_time < ds->write_time)
 531                                 diff_write_time = 1 + write_time
 532                                         + (UINT_MAX - ds->write_time);
 533                         else
 534                                 diff_write_time = write_time - ds->write_time;
 535
 536                         if (diff_read_ops != 0)
 537                                 ds->avg_read_time += (diff_read_time
 538                                                 + (diff_read_ops / 2))
 539                                         / diff_read_ops;
 540                         if (diff_write_ops != 0)
 541                                 ds->avg_write_time += (diff_write_time
 542                                                 + (diff_write_ops / 2))
 543                                         / diff_write_ops;
 544
 545                         ds->read_ops = read_ops;
 546                         ds->read_time = read_time;
 547                         ds->write_ops = write_ops;
 548                         ds->write_time = write_time;
 549                 } /* if (is_disk) */
 550
 551                 /* Don't write to the RRDs if we've just started.. */
 552                 ds->poll_count++;
 553                 if (ds->poll_count <= 2)
 554                 {
 555                         DEBUG ("disk plugin: (ds->poll_count = %i) <= "
 556                                         "(min_poll_count = 2); => Not writing.",
 557                                         ds->poll_count);
 558                         continue;
 559                 }
 560
 561                 if ((read_ops == 0) && (write_ops == 0))
 562                 {
 563                         DEBUG ("disk plugin: ((read_ops == 0) && "
 564                                         "(write_ops == 0)); => Not writing.");
 565                         continue;
 566                 }
 567
 568                 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
 569                         disk_submit (disk_name, "disk_octets",
 570                                         ds->read_bytes, ds->write_bytes);
 571
 572                 if ((ds->read_ops != 0) || (ds->write_ops != 0))
 573                         disk_submit (disk_name, "disk_ops",
 574                                         read_ops, write_ops);
 575
 576                 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
 577                         disk_submit (disk_name, "disk_time",
 578                                         ds->avg_read_time, ds->avg_write_time);
 579
 580                 if (is_disk)
 581                 {
 582                         if ((read_merged != -1LL) || (write_merged != -1LL))
 583                                 disk_submit (disk_name, "disk_merged",
 584                                                 read_merged, write_merged);
 585                 } /* if (is_disk) */
 586         } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
 587
 588         fclose (fh);
 589 /* #endif defined(KERNEL_LINUX) */
 590
 591 #elif HAVE_LIBKSTAT
 592 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
 593 #  define KIO_ROCTETS reads
 594 #  define KIO_WOCTETS writes
 595 #  define KIO_ROPS    nreads
 596 #  define KIO_WOPS    nwrites
 597 #  define KIO_RTIME   rtime
 598 #  define KIO_WTIME   wtime
 599 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
 600 #  define KIO_ROCTETS nread
 601 #  define KIO_WOCTETS nwritten
 602 #  define KIO_ROPS    reads
 603 #  define KIO_WOPS    writes
 604 #  define KIO_RTIME   rtime
 605 #  define KIO_WTIME   wtime
 606 # else
 607 #  error "kstat_io_t does not have the required members"
 608 # endif
 609         static kstat_io_t kio;
 610         int i;
 611
 612         if (kc == NULL)
 613                 return (-1);
 614
 615         for (i = 0; i < numdisk; i++)
 616         {
 617                 if (kstat_read (kc, ksp[i], &kio) == -1)
 618                         continue;
 619
 620                 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
 621                 {
 622                         disk_submit (ksp[i]->ks_name, "disk_octets",
 623                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 624                         disk_submit (ksp[i]->ks_name, "disk_ops",
 625                                         kio.KIO_ROPS, kio.KIO_WOPS);
 626                         /* FIXME: Convert this to microseconds if necessary */
 627                         disk_submit (ksp[i]->ks_name, "disk_time",
 628                                         kio.KIO_RTIME, kio.KIO_WTIME);
 629                 }
 630                 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
 631                 {
 632                         disk_submit (ksp[i]->ks_name, "disk_octets",
 633                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 634                         disk_submit (ksp[i]->ks_name, "disk_ops",
 635                                         kio.KIO_ROPS, kio.KIO_WOPS);
 636                 }
 637         }
 638 #endif /* defined(HAVE_LIBKSTAT) */
 639
 640         return (0);
 641 } /* int disk_read */
 642 #endif /* DISK_HAVE_READ */
 643
 644 void module_register (void)
 645 {
 646 #if DISK_HAVE_READ
 647         plugin_register_init ("disk", disk_init);
 648         plugin_register_read ("disk", disk_read);
 649 #endif /* DISK_HAVE_READ */
 650 } /* void module_register */