src/disk.c

   1 /**
   2  * collectd - src/disk.c
   3  * Copyright (C) 2005-2008  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 #include "utils_ignorelist.h"
  26
  27 #if HAVE_MACH_MACH_TYPES_H
  28 #  include <mach/mach_types.h>
  29 #endif
  30 #if HAVE_MACH_MACH_INIT_H
  31 #  include <mach/mach_init.h>
  32 #endif
  33 #if HAVE_MACH_MACH_ERROR_H
  34 #  include <mach/mach_error.h>
  35 #endif
  36 #if HAVE_MACH_MACH_PORT_H
  37 #  include <mach/mach_port.h>
  38 #endif
  39 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
  40 #  include <CoreFoundation/CoreFoundation.h>
  41 #endif
  42 #if HAVE_IOKIT_IOKITLIB_H
  43 #  include <IOKit/IOKitLib.h>
  44 #endif
  45 #if HAVE_IOKIT_IOTYPES_H
  46 #  include <IOKit/IOTypes.h>
  47 #endif
  48 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
  49 #  include <IOKit/storage/IOBlockStorageDriver.h>
  50 #endif
  51 #if HAVE_IOKIT_IOBSD_H
  52 #  include <IOKit/IOBSD.h>
  53 #endif
  54
  55 #if HAVE_LIMITS_H
  56 # include <limits.h>
  57 #endif
  58 #ifndef UINT_MAX
  59 #  define UINT_MAX 4294967295U
  60 #endif
  61
  62 #if HAVE_STATGRAB_H
  63 # include <statgrab.h>
  64 #endif
  65
  66 #if HAVE_IOKIT_IOKITLIB_H
  67 static mach_port_t io_master_port = MACH_PORT_NULL;
  68 /* #endif HAVE_IOKIT_IOKITLIB_H */
  69
  70 #elif KERNEL_LINUX
  71 typedef struct diskstats
  72 {
  73         char *name;
  74
  75         /* This overflows in roughly 1361 years */
  76         unsigned int poll_count;
  77
  78         counter_t read_sectors;
  79         counter_t write_sectors;
  80
  81         counter_t read_bytes;
  82         counter_t write_bytes;
  83
  84         counter_t read_ops;
  85         counter_t write_ops;
  86         counter_t read_time;
  87         counter_t write_time;
  88
  89         counter_t avg_read_time;
  90         counter_t avg_write_time;
  91
  92         struct diskstats *next;
  93 } diskstats_t;
  94
  95 static diskstats_t *disklist;
  96 /* #endif KERNEL_LINUX */
  97
  98 #elif HAVE_LIBKSTAT
  99 #define MAX_NUMDISK 256
 100 extern kstat_ctl_t *kc;
 101 static kstat_t *ksp[MAX_NUMDISK];
 102 static int numdisk = 0;
 103 /* #endif HAVE_LIBKSTAT */
 104
 105 #elif defined(HAVE_LIBSTATGRAB)
 106 /* #endif HAVE_LIBKSTATGRAB */
 107
 108 #else
 109 # error "No applicable input method."
 110 #endif
 111
 112 static const char *config_keys[] =
 113 {
 114         "Disk",
 115         "IgnoreSelected"
 116 };
 117 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 118
 119 static ignorelist_t *ignorelist = NULL;
 120
 121 static int disk_config (const char *key, const char *value)
 122 {
 123   if (ignorelist == NULL)
 124     ignorelist = ignorelist_create (/* invert = */ 1);
 125   if (ignorelist == NULL)
 126     return (1);
 127
 128   if (strcasecmp ("Disk", key) == 0)
 129   {
 130     ignorelist_add (ignorelist, value);
 131   }
 132   else if (strcasecmp ("IgnoreSelected", key) == 0)
 133   {
 134     int invert = 1;
 135     if (IS_TRUE (value))
 136       invert = 0;
 137     ignorelist_set_invert (ignorelist, invert);
 138   }
 139   else
 140   {
 141     return (-1);
 142   }
 143
 144   return (0);
 145 } /* int disk_config */
 146
 147 static int disk_init (void)
 148 {
 149 #if HAVE_IOKIT_IOKITLIB_H
 150         kern_return_t status;
 151
 152         if (io_master_port != MACH_PORT_NULL)
 153         {
 154                 mach_port_deallocate (mach_task_self (),
 155                                 io_master_port);
 156                 io_master_port = MACH_PORT_NULL;
 157         }
 158
 159         status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
 160         if (status != kIOReturnSuccess)
 161         {
 162                 ERROR ("IOMasterPort failed: %s",
 163                                 mach_error_string (status));
 164                 io_master_port = MACH_PORT_NULL;
 165                 return (-1);
 166         }
 167 /* #endif HAVE_IOKIT_IOKITLIB_H */
 168
 169 #elif KERNEL_LINUX
 170         /* do nothing */
 171 /* #endif KERNEL_LINUX */
 172
 173 #elif HAVE_LIBKSTAT
 174         kstat_t *ksp_chain;
 175
 176         numdisk = 0;
 177
 178         if (kc == NULL)
 179                 return (-1);
 180
 181         for (numdisk = 0, ksp_chain = kc->kc_chain;
 182                         (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
 183                         ksp_chain = ksp_chain->ks_next)
 184         {
 185                 if (strncmp (ksp_chain->ks_class, "disk", 4)
 186                                 && strncmp (ksp_chain->ks_class, "partition", 9))
 187                         continue;
 188                 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
 189                         continue;
 190                 ksp[numdisk++] = ksp_chain;
 191         }
 192 #endif /* HAVE_LIBKSTAT */
 193
 194         return (0);
 195 } /* int disk_init */
 196
 197 static void disk_submit (const char *plugin_instance,
 198                 const char *type,
 199                 counter_t read, counter_t write)
 200 {
 201         value_t values[2];
 202         value_list_t vl = VALUE_LIST_INIT;
 203
 204         /* Both `ignorelist' and `plugin_instance' may be NULL. */
 205         if (ignorelist_match (ignorelist, plugin_instance) != 0)
 206           return;
 207
 208         values[0].counter = read;
 209         values[1].counter = write;
 210
 211         vl.values = values;
 212         vl.values_len = 2;
 213         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 214         sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
 215         sstrncpy (vl.plugin_instance, plugin_instance,
 216                         sizeof (vl.plugin_instance));
 217         sstrncpy (vl.type, type, sizeof (vl.type));
 218
 219         plugin_dispatch_values (&vl);
 220 } /* void disk_submit */
 221
 222 #if HAVE_IOKIT_IOKITLIB_H
 223 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
 224 {
 225         signed long long val_int;
 226         CFNumberRef      val_obj;
 227         CFStringRef      key_obj;
 228
 229         /* `key_obj' needs to be released. */
 230         key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
 231                         kCFStringEncodingASCII);
 232         if (key_obj == NULL)
 233         {
 234                 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
 235                 return (-1LL);
 236         }
 237
 238         /* get => we don't need to release (== free) the object */
 239         val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
 240
 241         CFRelease (key_obj);
 242
 243         if (val_obj == NULL)
 244         {
 245                 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
 246                 return (-1LL);
 247         }
 248
 249         if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
 250         {
 251                 DEBUG ("CFNumberGetValue (%s) failed.", key);
 252                 return (-1LL);
 253         }
 254
 255         return (val_int);
 256 }
 257 #endif /* HAVE_IOKIT_IOKITLIB_H */
 258
 259 static int disk_read (void)
 260 {
 261 #if HAVE_IOKIT_IOKITLIB_H
 262         io_registry_entry_t     disk;
 263         io_registry_entry_t     disk_child;
 264         io_iterator_t           disk_list;
 265         CFDictionaryRef         props_dict;
 266         CFDictionaryRef         stats_dict;
 267         CFDictionaryRef         child_dict;
 268         kern_return_t           status;
 269
 270         signed long long read_ops;
 271         signed long long read_byt;
 272         signed long long read_tme;
 273         signed long long write_ops;
 274         signed long long write_byt;
 275         signed long long write_tme;
 276
 277         int  disk_major;
 278         int  disk_minor;
 279         char disk_name[64];
 280
 281         /* Get the list of all disk objects. */
 282         if (IOServiceGetMatchingServices (io_master_port,
 283                                 IOServiceMatching (kIOBlockStorageDriverClass),
 284                                 &disk_list) != kIOReturnSuccess)
 285         {
 286                 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
 287                 return (-1);
 288         }
 289
 290         while ((disk = IOIteratorNext (disk_list)) != 0)
 291         {
 292                 props_dict = NULL;
 293                 stats_dict = NULL;
 294                 child_dict = NULL;
 295
 296                 /* `disk_child' must be released */
 297                 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child))
 298                                 != kIOReturnSuccess)
 299                 {
 300                         /* This fails for example for DVD/CD drives.. */
 301                         DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
 302                         IOObjectRelease (disk);
 303                         continue;
 304                 }
 305
 306                 /* We create `props_dict' => we need to release it later */
 307                 if (IORegistryEntryCreateCFProperties (disk,
 308                                         (CFMutableDictionaryRef *) &props_dict,
 309                                         kCFAllocatorDefault,
 310                                         kNilOptions)
 311                                 != kIOReturnSuccess)
 312                 {
 313                         ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
 314                         IOObjectRelease (disk_child);
 315                         IOObjectRelease (disk);
 316                         continue;
 317                 }
 318
 319                 if (props_dict == NULL)
 320                 {
 321                         DEBUG ("IORegistryEntryCreateCFProperties (disk) failed.");
 322                         IOObjectRelease (disk_child);
 323                         IOObjectRelease (disk);
 324                         continue;
 325                 }
 326
 327                 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict,
 328                                 CFSTR (kIOBlockStorageDriverStatisticsKey));
 329
 330                 if (stats_dict == NULL)
 331                 {
 332                         DEBUG ("CFDictionaryGetValue (%s) failed.",
 333                                         kIOBlockStorageDriverStatisticsKey);
 334                         CFRelease (props_dict);
 335                         IOObjectRelease (disk_child);
 336                         IOObjectRelease (disk);
 337                         continue;
 338                 }
 339
 340                 if (IORegistryEntryCreateCFProperties (disk_child,
 341                                         (CFMutableDictionaryRef *) &child_dict,
 342                                         kCFAllocatorDefault,
 343                                         kNilOptions)
 344                                 != kIOReturnSuccess)
 345                 {
 346                         DEBUG ("IORegistryEntryCreateCFProperties (disk_child) failed.");
 347                         IOObjectRelease (disk_child);
 348                         CFRelease (props_dict);
 349                         IOObjectRelease (disk);
 350                         continue;
 351                 }
 352
 353                 /* kIOBSDNameKey */
 354                 disk_major = (int) dict_get_value (child_dict,
 355                                 kIOBSDMajorKey);
 356                 disk_minor = (int) dict_get_value (child_dict,
 357                                 kIOBSDMinorKey);
 358                 read_ops  = dict_get_value (stats_dict,
 359                                 kIOBlockStorageDriverStatisticsReadsKey);
 360                 read_byt  = dict_get_value (stats_dict,
 361                                 kIOBlockStorageDriverStatisticsBytesReadKey);
 362                 read_tme  = dict_get_value (stats_dict,
 363                                 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
 364                 write_ops = dict_get_value (stats_dict,
 365                                 kIOBlockStorageDriverStatisticsWritesKey);
 366                 write_byt = dict_get_value (stats_dict,
 367                                 kIOBlockStorageDriverStatisticsBytesWrittenKey);
 368                 /* This property describes the number of nanoseconds spent
 369                  * performing writes since the block storage driver was
 370                  * instantiated. It is one of the statistic entries listed
 371                  * under the top-level kIOBlockStorageDriverStatisticsKey
 372                  * property table. It has an OSNumber value. */
 373                 write_tme = dict_get_value (stats_dict,
 374                                 kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
 375
 376                 if (ssnprintf (disk_name, sizeof (disk_name),
 377                                 "%i-%i", disk_major, disk_minor) >= sizeof (disk_name))
 378                 {
 379                         DEBUG ("snprintf (major, minor) failed.");
 380                         CFRelease (child_dict);
 381                         IOObjectRelease (disk_child);
 382                         CFRelease (props_dict);
 383                         IOObjectRelease (disk);
 384                         continue;
 385                 }
 386                 DEBUG ("disk_name = %s", disk_name);
 387
 388                 if ((read_byt != -1LL) || (write_byt != -1LL))
 389                         disk_submit (disk_name, "disk_octets", read_byt, write_byt);
 390                 if ((read_ops != -1LL) || (write_ops != -1LL))
 391                         disk_submit (disk_name, "disk_ops", read_ops, write_ops);
 392                 if ((read_tme != -1LL) || (write_tme != -1LL))
 393                         disk_submit (disk_name, "disk_time",
 394                                         read_tme / 1000,
 395                                         write_tme / 1000);
 396
 397                 CFRelease (child_dict);
 398                 IOObjectRelease (disk_child);
 399                 CFRelease (props_dict);
 400                 IOObjectRelease (disk);
 401         }
 402         IOObjectRelease (disk_list);
 403 /* #endif HAVE_IOKIT_IOKITLIB_H */
 404
 405 #elif KERNEL_LINUX
 406         FILE *fh;
 407         char buffer[1024];
 408
 409         char *fields[32];
 410         int numfields;
 411         int fieldshift = 0;
 412
 413         int major = 0;
 414         int minor = 0;
 415
 416         counter_t read_sectors  = 0;
 417         counter_t write_sectors = 0;
 418
 419         counter_t read_ops      = 0;
 420         counter_t read_merged   = 0;
 421         counter_t read_time     = 0;
 422         counter_t write_ops     = 0;
 423         counter_t write_merged  = 0;
 424         counter_t write_time    = 0;
 425         int is_disk = 0;
 426
 427         diskstats_t *ds, *pre_ds;
 428
 429         if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
 430         {
 431                 fh = fopen ("/proc/partitions", "r");
 432                 if (fh == NULL)
 433                 {
 434                         ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
 435                         return (-1);
 436                 }
 437
 438                 /* Kernel is 2.4.* */
 439                 fieldshift = 1;
 440         }
 441
 442         while (fgets (buffer, sizeof (buffer), fh) != NULL)
 443         {
 444                 char *disk_name;
 445
 446                 numfields = strsplit (buffer, fields, 32);
 447
 448                 if ((numfields != (14 + fieldshift)) && (numfields != 7))
 449                         continue;
 450
 451                 major = atoll (fields[0]);
 452                 minor = atoll (fields[1]);
 453
 454                 disk_name = fields[2 + fieldshift];
 455
 456                 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
 457                         if (strcmp (disk_name, ds->name) == 0)
 458                                 break;
 459
 460                 if (ds == NULL)
 461                 {
 462                         if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
 463                                 continue;
 464
 465                         if ((ds->name = strdup (disk_name)) == NULL)
 466                         {
 467                                 free (ds);
 468                                 continue;
 469                         }
 470
 471                         if (pre_ds == NULL)
 472                                 disklist = ds;
 473                         else
 474                                 pre_ds->next = ds;
 475                 }
 476
 477                 is_disk = 0;
 478                 if (numfields == 7)
 479                 {
 480                         /* Kernel 2.6, Partition */
 481                         read_ops      = atoll (fields[3]);
 482                         read_sectors  = atoll (fields[4]);
 483                         write_ops     = atoll (fields[5]);
 484                         write_sectors = atoll (fields[6]);
 485                 }
 486                 else if (numfields == (14 + fieldshift))
 487                 {
 488                         read_ops  =  atoll (fields[3 + fieldshift]);
 489                         write_ops =  atoll (fields[7 + fieldshift]);
 490
 491                         read_sectors  = atoll (fields[5 + fieldshift]);
 492                         write_sectors = atoll (fields[9 + fieldshift]);
 493
 494                         if ((fieldshift == 0) || (minor == 0))
 495                         {
 496                                 is_disk = 1;
 497                                 read_merged  = atoll (fields[4 + fieldshift]);
 498                                 read_time    = atoll (fields[6 + fieldshift]);
 499                                 write_merged = atoll (fields[8 + fieldshift]);
 500                                 write_time   = atoll (fields[10+ fieldshift]);
 501                         }
 502                 }
 503                 else
 504                 {
 505                         DEBUG ("numfields = %i; => unknown file format.", numfields);
 506                         continue;
 507                 }
 508
 509                 {
 510                         counter_t diff_read_sectors;
 511                         counter_t diff_write_sectors;
 512
 513                 /* If the counter wraps around, it's only 32 bits.. */
 514                         if (read_sectors < ds->read_sectors)
 515                                 diff_read_sectors = 1 + read_sectors
 516                                         + (UINT_MAX - ds->read_sectors);
 517                         else
 518                                 diff_read_sectors = read_sectors - ds->read_sectors;
 519                         if (write_sectors < ds->write_sectors)
 520                                 diff_write_sectors = 1 + write_sectors
 521                                         + (UINT_MAX - ds->write_sectors);
 522                         else
 523                                 diff_write_sectors = write_sectors - ds->write_sectors;
 524
 525                         ds->read_bytes += 512 * diff_read_sectors;
 526                         ds->write_bytes += 512 * diff_write_sectors;
 527                         ds->read_sectors = read_sectors;
 528                         ds->write_sectors = write_sectors;
 529                 }
 530
 531                 /* Calculate the average time an io-op needs to complete */
 532                 if (is_disk)
 533                 {
 534                         counter_t diff_read_ops;
 535                         counter_t diff_write_ops;
 536                         counter_t diff_read_time;
 537                         counter_t diff_write_time;
 538
 539                         if (read_ops < ds->read_ops)
 540                                 diff_read_ops = 1 + read_ops
 541                                         + (UINT_MAX - ds->read_ops);
 542                         else
 543                                 diff_read_ops = read_ops - ds->read_ops;
 544                         DEBUG ("disk plugin: disk_name = %s; read_ops = %llu; "
 545                                         "ds->read_ops = %llu; diff_read_ops = %llu;",
 546                                         disk_name,
 547                                         read_ops, ds->read_ops, diff_read_ops);
 548
 549                         if (write_ops < ds->write_ops)
 550                                 diff_write_ops = 1 + write_ops
 551                                         + (UINT_MAX - ds->write_ops);
 552                         else
 553                                 diff_write_ops = write_ops - ds->write_ops;
 554
 555                         if (read_time < ds->read_time)
 556                                 diff_read_time = 1 + read_time
 557                                         + (UINT_MAX - ds->read_time);
 558                         else
 559                                 diff_read_time = read_time - ds->read_time;
 560
 561                         if (write_time < ds->write_time)
 562                                 diff_write_time = 1 + write_time
 563                                         + (UINT_MAX - ds->write_time);
 564                         else
 565                                 diff_write_time = write_time - ds->write_time;
 566
 567                         if (diff_read_ops != 0)
 568                                 ds->avg_read_time += (diff_read_time
 569                                                 + (diff_read_ops / 2))
 570                                         / diff_read_ops;
 571                         if (diff_write_ops != 0)
 572                                 ds->avg_write_time += (diff_write_time
 573                                                 + (diff_write_ops / 2))
 574                                         / diff_write_ops;
 575
 576                         ds->read_ops = read_ops;
 577                         ds->read_time = read_time;
 578                         ds->write_ops = write_ops;
 579                         ds->write_time = write_time;
 580                 } /* if (is_disk) */
 581
 582                 /* Don't write to the RRDs if we've just started.. */
 583                 ds->poll_count++;
 584                 if (ds->poll_count <= 2)
 585                 {
 586                         DEBUG ("disk plugin: (ds->poll_count = %i) <= "
 587                                         "(min_poll_count = 2); => Not writing.",
 588                                         ds->poll_count);
 589                         continue;
 590                 }
 591
 592                 if ((read_ops == 0) && (write_ops == 0))
 593                 {
 594                         DEBUG ("disk plugin: ((read_ops == 0) && "
 595                                         "(write_ops == 0)); => Not writing.");
 596                         continue;
 597                 }
 598
 599                 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
 600                         disk_submit (disk_name, "disk_octets",
 601                                         ds->read_bytes, ds->write_bytes);
 602
 603                 if ((ds->read_ops != 0) || (ds->write_ops != 0))
 604                         disk_submit (disk_name, "disk_ops",
 605                                         read_ops, write_ops);
 606
 607                 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
 608                         disk_submit (disk_name, "disk_time",
 609                                         ds->avg_read_time, ds->avg_write_time);
 610
 611                 if (is_disk)
 612                 {
 613                         disk_submit (disk_name, "disk_merged",
 614                                         read_merged, write_merged);
 615                 } /* if (is_disk) */
 616         } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
 617
 618         fclose (fh);
 619 /* #endif defined(KERNEL_LINUX) */
 620
 621 #elif HAVE_LIBKSTAT
 622 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
 623 #  define KIO_ROCTETS reads
 624 #  define KIO_WOCTETS writes
 625 #  define KIO_ROPS    nreads
 626 #  define KIO_WOPS    nwrites
 627 #  define KIO_RTIME   rtime
 628 #  define KIO_WTIME   wtime
 629 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
 630 #  define KIO_ROCTETS nread
 631 #  define KIO_WOCTETS nwritten
 632 #  define KIO_ROPS    reads
 633 #  define KIO_WOPS    writes
 634 #  define KIO_RTIME   rtime
 635 #  define KIO_WTIME   wtime
 636 # else
 637 #  error "kstat_io_t does not have the required members"
 638 # endif
 639         static kstat_io_t kio;
 640         int i;
 641
 642         if (kc == NULL)
 643                 return (-1);
 644
 645         for (i = 0; i < numdisk; i++)
 646         {
 647                 if (kstat_read (kc, ksp[i], &kio) == -1)
 648                         continue;
 649
 650                 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
 651                 {
 652                         disk_submit (ksp[i]->ks_name, "disk_octets",
 653                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 654                         disk_submit (ksp[i]->ks_name, "disk_ops",
 655                                         kio.KIO_ROPS, kio.KIO_WOPS);
 656                         /* FIXME: Convert this to microseconds if necessary */
 657                         disk_submit (ksp[i]->ks_name, "disk_time",
 658                                         kio.KIO_RTIME, kio.KIO_WTIME);
 659                 }
 660                 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
 661                 {
 662                         disk_submit (ksp[i]->ks_name, "disk_octets",
 663                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 664                         disk_submit (ksp[i]->ks_name, "disk_ops",
 665                                         kio.KIO_ROPS, kio.KIO_WOPS);
 666                 }
 667         }
 668 /* #endif defined(HAVE_LIBKSTAT) */
 669
 670 #elif defined(HAVE_LIBSTATGRAB)
 671         sg_disk_io_stats *ds;
 672         int disks, counter;
 673         char name[DATA_MAX_NAME_LEN];
 674
 675         if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
 676                 return (0);
 677
 678         for (counter=0; counter < disks; counter++) {
 679                 strncpy(name, ds->disk_name, sizeof(name));
 680                 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
 681                 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
 682                 ds++;
 683         }
 684 #endif /* defined(HAVE_LIBSTATGRAB) */
 685
 686         return (0);
 687 } /* int disk_read */
 688
 689 void module_register (void)
 690 {
 691   plugin_register_config ("disk", disk_config,
 692       config_keys, config_keys_num);
 693   plugin_register_init ("disk", disk_init);
 694   plugin_register_read ("disk", disk_read);
 695 } /* void module_register */