src/disk.c

   1 /**
   2  * collectd - src/disk.c
   3  * Copyright (C) 2005-2010  Florian octo Forster
   4  * Copyright (C) 2009       Manuel Sanmartin
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; only version 2 of the License is applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  *
  19  * Authors:
  20  *   Florian octo Forster <octo at verplant.org>
  21  *   Manuel Sanmartin
  22  **/
  23
  24 #include "collectd.h"
  25 #include "common.h"
  26 #include "plugin.h"
  27 #include "utils_ignorelist.h"
  28
  29 #if HAVE_MACH_MACH_TYPES_H
  30 #  include <mach/mach_types.h>
  31 #endif
  32 #if HAVE_MACH_MACH_INIT_H
  33 #  include <mach/mach_init.h>
  34 #endif
  35 #if HAVE_MACH_MACH_ERROR_H
  36 #  include <mach/mach_error.h>
  37 #endif
  38 #if HAVE_MACH_MACH_PORT_H
  39 #  include <mach/mach_port.h>
  40 #endif
  41 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
  42 #  include <CoreFoundation/CoreFoundation.h>
  43 #endif
  44 #if HAVE_IOKIT_IOKITLIB_H
  45 #  include <IOKit/IOKitLib.h>
  46 #endif
  47 #if HAVE_IOKIT_IOTYPES_H
  48 #  include <IOKit/IOTypes.h>
  49 #endif
  50 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
  51 #  include <IOKit/storage/IOBlockStorageDriver.h>
  52 #endif
  53 #if HAVE_IOKIT_IOBSD_H
  54 #  include <IOKit/IOBSD.h>
  55 #endif
  56
  57 #if HAVE_LIMITS_H
  58 # include <limits.h>
  59 #endif
  60 #ifndef UINT_MAX
  61 #  define UINT_MAX 4294967295U
  62 #endif
  63
  64 #if HAVE_STATGRAB_H
  65 # include <statgrab.h>
  66 #endif
  67
  68 #if HAVE_PERFSTAT
  69 # ifndef _AIXVERSION_610
  70 # include <sys/systemcfg.h>
  71 # endif
  72 # include <sys/protosw.h>
  73 # include <libperfstat.h>
  74 #endif
  75
  76 #if HAVE_IOKIT_IOKITLIB_H
  77 static mach_port_t io_master_port = MACH_PORT_NULL;
  78 /* #endif HAVE_IOKIT_IOKITLIB_H */
  79
  80 #elif KERNEL_LINUX
  81 typedef struct diskstats
  82 {
  83         char *name;
  84
  85         /* This overflows in roughly 1361 years */
  86         unsigned int poll_count;
  87
  88         derive_t read_sectors;
  89         derive_t write_sectors;
  90
  91         derive_t read_bytes;
  92         derive_t write_bytes;
  93
  94         derive_t read_ops;
  95         derive_t write_ops;
  96         derive_t read_time;
  97         derive_t write_time;
  98
  99         derive_t avg_read_time;
 100         derive_t avg_write_time;
 101
 102         struct diskstats *next;
 103 } diskstats_t;
 104
 105 static diskstats_t *disklist;
 106 /* #endif KERNEL_LINUX */
 107
 108 #elif HAVE_LIBKSTAT
 109 #define MAX_NUMDISK 256
 110 extern kstat_ctl_t *kc;
 111 static kstat_t *ksp[MAX_NUMDISK];
 112 static int numdisk = 0;
 113 /* #endif HAVE_LIBKSTAT */
 114
 115 #elif defined(HAVE_LIBSTATGRAB)
 116 /* #endif HAVE_LIBKSTATGRAB */
 117
 118 #elif HAVE_PERFSTAT
 119 static perfstat_disk_t * stat_disk;
 120 static int numdisk;
 121 static int pnumdisk;
 122 /* #endif HAVE_PERFSTAT */
 123
 124 #else
 125 # error "No applicable input method."
 126 #endif
 127
 128 static const char *config_keys[] =
 129 {
 130         "Disk",
 131         "IgnoreSelected"
 132 };
 133 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 134
 135 static ignorelist_t *ignorelist = NULL;
 136
 137 static int disk_config (const char *key, const char *value)
 138 {
 139   if (ignorelist == NULL)
 140     ignorelist = ignorelist_create (/* invert = */ 1);
 141   if (ignorelist == NULL)
 142     return (1);
 143
 144   if (strcasecmp ("Disk", key) == 0)
 145   {
 146     ignorelist_add (ignorelist, value);
 147   }
 148   else if (strcasecmp ("IgnoreSelected", key) == 0)
 149   {
 150     int invert = 1;
 151     if (IS_TRUE (value))
 152       invert = 0;
 153     ignorelist_set_invert (ignorelist, invert);
 154   }
 155   else
 156   {
 157     return (-1);
 158   }
 159
 160   return (0);
 161 } /* int disk_config */
 162
 163 static int disk_init (void)
 164 {
 165 #if HAVE_IOKIT_IOKITLIB_H
 166         kern_return_t status;
 167
 168         if (io_master_port != MACH_PORT_NULL)
 169         {
 170                 mach_port_deallocate (mach_task_self (),
 171                                 io_master_port);
 172                 io_master_port = MACH_PORT_NULL;
 173         }
 174
 175         status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
 176         if (status != kIOReturnSuccess)
 177         {
 178                 ERROR ("IOMasterPort failed: %s",
 179                                 mach_error_string (status));
 180                 io_master_port = MACH_PORT_NULL;
 181                 return (-1);
 182         }
 183 /* #endif HAVE_IOKIT_IOKITLIB_H */
 184
 185 #elif KERNEL_LINUX
 186         /* do nothing */
 187 /* #endif KERNEL_LINUX */
 188
 189 #elif HAVE_LIBKSTAT
 190         kstat_t *ksp_chain;
 191
 192         numdisk = 0;
 193
 194         if (kc == NULL)
 195                 return (-1);
 196
 197         for (numdisk = 0, ksp_chain = kc->kc_chain;
 198                         (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
 199                         ksp_chain = ksp_chain->ks_next)
 200         {
 201                 if (strncmp (ksp_chain->ks_class, "disk", 4)
 202                                 && strncmp (ksp_chain->ks_class, "partition", 9))
 203                         continue;
 204                 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
 205                         continue;
 206                 ksp[numdisk++] = ksp_chain;
 207         }
 208 #endif /* HAVE_LIBKSTAT */
 209
 210         return (0);
 211 } /* int disk_init */
 212
 213 static void disk_submit (const char *plugin_instance,
 214                 const char *type,
 215                 derive_t read, derive_t write)
 216 {
 217         value_t values[2];
 218         value_list_t vl = VALUE_LIST_INIT;
 219
 220         /* Both `ignorelist' and `plugin_instance' may be NULL. */
 221         if (ignorelist_match (ignorelist, plugin_instance) != 0)
 222           return;
 223
 224         values[0].derive = read;
 225         values[1].derive = write;
 226
 227         vl.values = values;
 228         vl.values_len = 2;
 229         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
 230         sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
 231         sstrncpy (vl.plugin_instance, plugin_instance,
 232                         sizeof (vl.plugin_instance));
 233         sstrncpy (vl.type, type, sizeof (vl.type));
 234
 235         plugin_dispatch_values (&vl);
 236 } /* void disk_submit */
 237
 238 #if KERNEL_LINUX
 239 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
 240 {
 241         double avg_time = ((double) delta_time) / ((double) delta_ops);
 242         double avg_time_incr = CDTIME_T_TO_DOUBLE (interval_g) * avg_time;
 243
 244         return ((counter_t) (avg_time_incr + .5));
 245 }
 246 #endif
 247
 248 #if HAVE_IOKIT_IOKITLIB_H
 249 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
 250 {
 251         signed long long val_int;
 252         CFNumberRef      val_obj;
 253         CFStringRef      key_obj;
 254
 255         /* `key_obj' needs to be released. */
 256         key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
 257                         kCFStringEncodingASCII);
 258         if (key_obj == NULL)
 259         {
 260                 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
 261                 return (-1LL);
 262         }
 263
 264         /* get => we don't need to release (== free) the object */
 265         val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
 266
 267         CFRelease (key_obj);
 268
 269         if (val_obj == NULL)
 270         {
 271                 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
 272                 return (-1LL);
 273         }
 274
 275         if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
 276         {
 277                 DEBUG ("CFNumberGetValue (%s) failed.", key);
 278                 return (-1LL);
 279         }
 280
 281         return (val_int);
 282 }
 283 #endif /* HAVE_IOKIT_IOKITLIB_H */
 284
 285 static int disk_read (void)
 286 {
 287 #if HAVE_IOKIT_IOKITLIB_H
 288         io_registry_entry_t     disk;
 289         io_registry_entry_t     disk_child;
 290         io_iterator_t           disk_list;
 291         CFDictionaryRef         props_dict;
 292         CFDictionaryRef         stats_dict;
 293         CFDictionaryRef         child_dict;
 294         kern_return_t           status;
 295
 296         signed long long read_ops;
 297         signed long long read_byt;
 298         signed long long read_tme;
 299         signed long long write_ops;
 300         signed long long write_byt;
 301         signed long long write_tme;
 302
 303         int  disk_major;
 304         int  disk_minor;
 305         char disk_name[64];
 306
 307         /* Get the list of all disk objects. */
 308         if (IOServiceGetMatchingServices (io_master_port,
 309                                 IOServiceMatching (kIOBlockStorageDriverClass),
 310                                 &disk_list) != kIOReturnSuccess)
 311         {
 312                 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
 313                 return (-1);
 314         }
 315
 316         while ((disk = IOIteratorNext (disk_list)) != 0)
 317         {
 318                 props_dict = NULL;
 319                 stats_dict = NULL;
 320                 child_dict = NULL;
 321
 322                 /* `disk_child' must be released */
 323                 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child))
 324                                 != kIOReturnSuccess)
 325                 {
 326                         /* This fails for example for DVD/CD drives.. */
 327                         DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
 328                         IOObjectRelease (disk);
 329                         continue;
 330                 }
 331
 332                 /* We create `props_dict' => we need to release it later */
 333                 if (IORegistryEntryCreateCFProperties (disk,
 334                                         (CFMutableDictionaryRef *) &props_dict,
 335                                         kCFAllocatorDefault,
 336                                         kNilOptions)
 337                                 != kIOReturnSuccess)
 338                 {
 339                         ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
 340                         IOObjectRelease (disk_child);
 341                         IOObjectRelease (disk);
 342                         continue;
 343                 }
 344
 345                 if (props_dict == NULL)
 346                 {
 347                         DEBUG ("IORegistryEntryCreateCFProperties (disk) failed.");
 348                         IOObjectRelease (disk_child);
 349                         IOObjectRelease (disk);
 350                         continue;
 351                 }
 352
 353                 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict,
 354                                 CFSTR (kIOBlockStorageDriverStatisticsKey));
 355
 356                 if (stats_dict == NULL)
 357                 {
 358                         DEBUG ("CFDictionaryGetValue (%s) failed.",
 359                                         kIOBlockStorageDriverStatisticsKey);
 360                         CFRelease (props_dict);
 361                         IOObjectRelease (disk_child);
 362                         IOObjectRelease (disk);
 363                         continue;
 364                 }
 365
 366                 if (IORegistryEntryCreateCFProperties (disk_child,
 367                                         (CFMutableDictionaryRef *) &child_dict,
 368                                         kCFAllocatorDefault,
 369                                         kNilOptions)
 370                                 != kIOReturnSuccess)
 371                 {
 372                         DEBUG ("IORegistryEntryCreateCFProperties (disk_child) failed.");
 373                         IOObjectRelease (disk_child);
 374                         CFRelease (props_dict);
 375                         IOObjectRelease (disk);
 376                         continue;
 377                 }
 378
 379                 /* kIOBSDNameKey */
 380                 disk_major = (int) dict_get_value (child_dict,
 381                                 kIOBSDMajorKey);
 382                 disk_minor = (int) dict_get_value (child_dict,
 383                                 kIOBSDMinorKey);
 384                 read_ops  = dict_get_value (stats_dict,
 385                                 kIOBlockStorageDriverStatisticsReadsKey);
 386                 read_byt  = dict_get_value (stats_dict,
 387                                 kIOBlockStorageDriverStatisticsBytesReadKey);
 388                 read_tme  = dict_get_value (stats_dict,
 389                                 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
 390                 write_ops = dict_get_value (stats_dict,
 391                                 kIOBlockStorageDriverStatisticsWritesKey);
 392                 write_byt = dict_get_value (stats_dict,
 393                                 kIOBlockStorageDriverStatisticsBytesWrittenKey);
 394                 /* This property describes the number of nanoseconds spent
 395                  * performing writes since the block storage driver was
 396                  * instantiated. It is one of the statistic entries listed
 397                  * under the top-level kIOBlockStorageDriverStatisticsKey
 398                  * property table. It has an OSNumber value. */
 399                 write_tme = dict_get_value (stats_dict,
 400                                 kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
 401
 402                 if (ssnprintf (disk_name, sizeof (disk_name),
 403                                 "%i-%i", disk_major, disk_minor) >= sizeof (disk_name))
 404                 {
 405                         DEBUG ("snprintf (major, minor) failed.");
 406                         CFRelease (child_dict);
 407                         IOObjectRelease (disk_child);
 408                         CFRelease (props_dict);
 409                         IOObjectRelease (disk);
 410                         continue;
 411                 }
 412                 DEBUG ("disk_name = %s", disk_name);
 413
 414                 if ((read_byt != -1LL) || (write_byt != -1LL))
 415                         disk_submit (disk_name, "disk_octets", read_byt, write_byt);
 416                 if ((read_ops != -1LL) || (write_ops != -1LL))
 417                         disk_submit (disk_name, "disk_ops", read_ops, write_ops);
 418                 if ((read_tme != -1LL) || (write_tme != -1LL))
 419                         disk_submit (disk_name, "disk_time",
 420                                         read_tme / 1000,
 421                                         write_tme / 1000);
 422
 423                 CFRelease (child_dict);
 424                 IOObjectRelease (disk_child);
 425                 CFRelease (props_dict);
 426                 IOObjectRelease (disk);
 427         }
 428         IOObjectRelease (disk_list);
 429 /* #endif HAVE_IOKIT_IOKITLIB_H */
 430
 431 #elif KERNEL_LINUX
 432         FILE *fh;
 433         char buffer[1024];
 434
 435         char *fields[32];
 436         int numfields;
 437         int fieldshift = 0;
 438
 439         int minor = 0;
 440
 441         derive_t read_sectors  = 0;
 442         derive_t write_sectors = 0;
 443
 444         derive_t read_ops      = 0;
 445         derive_t read_merged   = 0;
 446         derive_t read_time     = 0;
 447         derive_t write_ops     = 0;
 448         derive_t write_merged  = 0;
 449         derive_t write_time    = 0;
 450         int is_disk = 0;
 451
 452         diskstats_t *ds, *pre_ds;
 453
 454         if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
 455         {
 456                 fh = fopen ("/proc/partitions", "r");
 457                 if (fh == NULL)
 458                 {
 459                         ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
 460                         return (-1);
 461                 }
 462
 463                 /* Kernel is 2.4.* */
 464                 fieldshift = 1;
 465         }
 466
 467         while (fgets (buffer, sizeof (buffer), fh) != NULL)
 468         {
 469                 char *disk_name;
 470
 471                 numfields = strsplit (buffer, fields, 32);
 472
 473                 if ((numfields != (14 + fieldshift)) && (numfields != 7))
 474                         continue;
 475
 476                 minor = atoll (fields[1]);
 477
 478                 disk_name = fields[2 + fieldshift];
 479
 480                 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
 481                         if (strcmp (disk_name, ds->name) == 0)
 482                                 break;
 483
 484                 if (ds == NULL)
 485                 {
 486                         if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
 487                                 continue;
 488
 489                         if ((ds->name = strdup (disk_name)) == NULL)
 490                         {
 491                                 free (ds);
 492                                 continue;
 493                         }
 494
 495                         if (pre_ds == NULL)
 496                                 disklist = ds;
 497                         else
 498                                 pre_ds->next = ds;
 499                 }
 500
 501                 is_disk = 0;
 502                 if (numfields == 7)
 503                 {
 504                         /* Kernel 2.6, Partition */
 505                         read_ops      = atoll (fields[3]);
 506                         read_sectors  = atoll (fields[4]);
 507                         write_ops     = atoll (fields[5]);
 508                         write_sectors = atoll (fields[6]);
 509                 }
 510                 else if (numfields == (14 + fieldshift))
 511                 {
 512                         read_ops  =  atoll (fields[3 + fieldshift]);
 513                         write_ops =  atoll (fields[7 + fieldshift]);
 514
 515                         read_sectors  = atoll (fields[5 + fieldshift]);
 516                         write_sectors = atoll (fields[9 + fieldshift]);
 517
 518                         if ((fieldshift == 0) || (minor == 0))
 519                         {
 520                                 is_disk = 1;
 521                                 read_merged  = atoll (fields[4 + fieldshift]);
 522                                 read_time    = atoll (fields[6 + fieldshift]);
 523                                 write_merged = atoll (fields[8 + fieldshift]);
 524                                 write_time   = atoll (fields[10+ fieldshift]);
 525                         }
 526                 }
 527                 else
 528                 {
 529                         DEBUG ("numfields = %i; => unknown file format.", numfields);
 530                         continue;
 531                 }
 532
 533                 {
 534                         derive_t diff_read_sectors;
 535                         derive_t diff_write_sectors;
 536
 537                 /* If the counter wraps around, it's only 32 bits.. */
 538                         if (read_sectors < ds->read_sectors)
 539                                 diff_read_sectors = 1 + read_sectors
 540                                         + (UINT_MAX - ds->read_sectors);
 541                         else
 542                                 diff_read_sectors = read_sectors - ds->read_sectors;
 543                         if (write_sectors < ds->write_sectors)
 544                                 diff_write_sectors = 1 + write_sectors
 545                                         + (UINT_MAX - ds->write_sectors);
 546                         else
 547                                 diff_write_sectors = write_sectors - ds->write_sectors;
 548
 549                         ds->read_bytes += 512 * diff_read_sectors;
 550                         ds->write_bytes += 512 * diff_write_sectors;
 551                         ds->read_sectors = read_sectors;
 552                         ds->write_sectors = write_sectors;
 553                 }
 554
 555                 /* Calculate the average time an io-op needs to complete */
 556                 if (is_disk)
 557                 {
 558                         derive_t diff_read_ops;
 559                         derive_t diff_write_ops;
 560                         derive_t diff_read_time;
 561                         derive_t diff_write_time;
 562
 563                         if (read_ops < ds->read_ops)
 564                                 diff_read_ops = 1 + read_ops
 565                                         + (UINT_MAX - ds->read_ops);
 566                         else
 567                                 diff_read_ops = read_ops - ds->read_ops;
 568                         DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
 569                                         "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
 570                                         disk_name,
 571                                         read_ops, ds->read_ops, diff_read_ops);
 572
 573                         if (write_ops < ds->write_ops)
 574                                 diff_write_ops = 1 + write_ops
 575                                         + (UINT_MAX - ds->write_ops);
 576                         else
 577                                 diff_write_ops = write_ops - ds->write_ops;
 578
 579                         if (read_time < ds->read_time)
 580                                 diff_read_time = 1 + read_time
 581                                         + (UINT_MAX - ds->read_time);
 582                         else
 583                                 diff_read_time = read_time - ds->read_time;
 584
 585                         if (write_time < ds->write_time)
 586                                 diff_write_time = 1 + write_time
 587                                         + (UINT_MAX - ds->write_time);
 588                         else
 589                                 diff_write_time = write_time - ds->write_time;
 590
 591                         if (diff_read_ops != 0)
 592                                 ds->avg_read_time += disk_calc_time_incr (
 593                                                 diff_read_time, diff_read_ops);
 594                         if (diff_write_ops != 0)
 595                                 ds->avg_write_time += disk_calc_time_incr (
 596                                                 diff_write_time, diff_write_ops);
 597
 598                         ds->read_ops = read_ops;
 599                         ds->read_time = read_time;
 600                         ds->write_ops = write_ops;
 601                         ds->write_time = write_time;
 602                 } /* if (is_disk) */
 603
 604                 /* Don't write to the RRDs if we've just started.. */
 605                 ds->poll_count++;
 606                 if (ds->poll_count <= 2)
 607                 {
 608                         DEBUG ("disk plugin: (ds->poll_count = %i) <= "
 609                                         "(min_poll_count = 2); => Not writing.",
 610                                         ds->poll_count);
 611                         continue;
 612                 }
 613
 614                 if ((read_ops == 0) && (write_ops == 0))
 615                 {
 616                         DEBUG ("disk plugin: ((read_ops == 0) && "
 617                                         "(write_ops == 0)); => Not writing.");
 618                         continue;
 619                 }
 620
 621                 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
 622                         disk_submit (disk_name, "disk_octets",
 623                                         ds->read_bytes, ds->write_bytes);
 624
 625                 if ((ds->read_ops != 0) || (ds->write_ops != 0))
 626                         disk_submit (disk_name, "disk_ops",
 627                                         read_ops, write_ops);
 628
 629                 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
 630                         disk_submit (disk_name, "disk_time",
 631                                         ds->avg_read_time, ds->avg_write_time);
 632
 633                 if (is_disk)
 634                 {
 635                         disk_submit (disk_name, "disk_merged",
 636                                         read_merged, write_merged);
 637                 } /* if (is_disk) */
 638         } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
 639
 640         fclose (fh);
 641 /* #endif defined(KERNEL_LINUX) */
 642
 643 #elif HAVE_LIBKSTAT
 644 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
 645 #  define KIO_ROCTETS reads
 646 #  define KIO_WOCTETS writes
 647 #  define KIO_ROPS    nreads
 648 #  define KIO_WOPS    nwrites
 649 #  define KIO_RTIME   rtime
 650 #  define KIO_WTIME   wtime
 651 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
 652 #  define KIO_ROCTETS nread
 653 #  define KIO_WOCTETS nwritten
 654 #  define KIO_ROPS    reads
 655 #  define KIO_WOPS    writes
 656 #  define KIO_RTIME   rtime
 657 #  define KIO_WTIME   wtime
 658 # else
 659 #  error "kstat_io_t does not have the required members"
 660 # endif
 661         static kstat_io_t kio;
 662         int i;
 663
 664         if (kc == NULL)
 665                 return (-1);
 666
 667         for (i = 0; i < numdisk; i++)
 668         {
 669                 if (kstat_read (kc, ksp[i], &kio) == -1)
 670                         continue;
 671
 672                 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
 673                 {
 674                         disk_submit (ksp[i]->ks_name, "disk_octets",
 675                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 676                         disk_submit (ksp[i]->ks_name, "disk_ops",
 677                                         kio.KIO_ROPS, kio.KIO_WOPS);
 678                         /* FIXME: Convert this to microseconds if necessary */
 679                         disk_submit (ksp[i]->ks_name, "disk_time",
 680                                         kio.KIO_RTIME, kio.KIO_WTIME);
 681                 }
 682                 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
 683                 {
 684                         disk_submit (ksp[i]->ks_name, "disk_octets",
 685                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 686                         disk_submit (ksp[i]->ks_name, "disk_ops",
 687                                         kio.KIO_ROPS, kio.KIO_WOPS);
 688                 }
 689         }
 690 /* #endif defined(HAVE_LIBKSTAT) */
 691
 692 #elif defined(HAVE_LIBSTATGRAB)
 693         sg_disk_io_stats *ds;
 694         int disks, counter;
 695         char name[DATA_MAX_NAME_LEN];
 696
 697         if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
 698                 return (0);
 699
 700         for (counter=0; counter < disks; counter++) {
 701                 strncpy(name, ds->disk_name, sizeof(name));
 702                 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
 703                 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
 704                 ds++;
 705         }
 706 /* #endif defined(HAVE_LIBSTATGRAB) */
 707
 708 #elif defined(HAVE_PERFSTAT)
 709         derive_t read_sectors;
 710         derive_t write_sectors;
 711         derive_t read_time;
 712         derive_t write_time;
 713         derive_t read_ops;
 714         derive_t write_ops;
 715         perfstat_id_t firstpath;
 716         int rnumdisk;
 717         int i;
 718
 719         if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
 720         {
 721                 char errbuf[1024];
 722                 WARNING ("disk plugin: perfstat_disk: %s",
 723                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 724                 return (-1);
 725         }
 726
 727         if (numdisk != pnumdisk || stat_disk==NULL) {
 728                 if (stat_disk!=NULL)
 729                         free(stat_disk);
 730                 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
 731         }
 732         pnumdisk = numdisk;
 733
 734         firstpath.name[0]='\0';
 735         if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
 736         {
 737                 char errbuf[1024];
 738                 WARNING ("disk plugin: perfstat_disk : %s",
 739                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 740                 return (-1);
 741         }
 742
 743         for (i = 0; i < rnumdisk; i++)
 744         {
 745                 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
 746                 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
 747                 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
 748
 749                 read_ops = stat_disk[i].xrate;
 750                 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
 751                 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
 752
 753                 read_time = stat_disk[i].rserv;
 754                 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
 755                 write_time = stat_disk[i].wserv;
 756                 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
 757                 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
 758         }
 759 #endif /* defined(HAVE_PERFSTAT) */
 760
 761         return (0);
 762 } /* int disk_read */
 763
 764 void module_register (void)
 765 {
 766   plugin_register_config ("disk", disk_config,
 767       config_keys, config_keys_num);
 768   plugin_register_init ("disk", disk_init);
 769   plugin_register_read ("disk", disk_read);
 770 } /* void module_register */