src/disk.c

   1 /**
   2  * collectd - src/disk.c
   3  * Copyright (C) 2005-2008  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         counter_t read_sectors;
  89         counter_t write_sectors;
  90
  91         counter_t read_bytes;
  92         counter_t write_bytes;
  93
  94         counter_t read_ops;
  95         counter_t write_ops;
  96         counter_t read_time;
  97         counter_t write_time;
  98
  99         counter_t avg_read_time;
 100         counter_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                 counter_t read, counter_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].counter = read;
 225         values[1].counter = 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 HAVE_IOKIT_IOKITLIB_H
 239 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
 240 {
 241         signed long long val_int;
 242         CFNumberRef      val_obj;
 243         CFStringRef      key_obj;
 244
 245         /* `key_obj' needs to be released. */
 246         key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
 247                         kCFStringEncodingASCII);
 248         if (key_obj == NULL)
 249         {
 250                 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
 251                 return (-1LL);
 252         }
 253
 254         /* get => we don't need to release (== free) the object */
 255         val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
 256
 257         CFRelease (key_obj);
 258
 259         if (val_obj == NULL)
 260         {
 261                 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
 262                 return (-1LL);
 263         }
 264
 265         if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
 266         {
 267                 DEBUG ("CFNumberGetValue (%s) failed.", key);
 268                 return (-1LL);
 269         }
 270
 271         return (val_int);
 272 }
 273 #endif /* HAVE_IOKIT_IOKITLIB_H */
 274
 275 static int disk_read (void)
 276 {
 277 #if HAVE_IOKIT_IOKITLIB_H
 278         io_registry_entry_t     disk;
 279         io_registry_entry_t     disk_child;
 280         io_iterator_t           disk_list;
 281         CFDictionaryRef         props_dict;
 282         CFDictionaryRef         stats_dict;
 283         CFDictionaryRef         child_dict;
 284         kern_return_t           status;
 285
 286         signed long long read_ops;
 287         signed long long read_byt;
 288         signed long long read_tme;
 289         signed long long write_ops;
 290         signed long long write_byt;
 291         signed long long write_tme;
 292
 293         int  disk_major;
 294         int  disk_minor;
 295         char disk_name[64];
 296
 297         /* Get the list of all disk objects. */
 298         if (IOServiceGetMatchingServices (io_master_port,
 299                                 IOServiceMatching (kIOBlockStorageDriverClass),
 300                                 &disk_list) != kIOReturnSuccess)
 301         {
 302                 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
 303                 return (-1);
 304         }
 305
 306         while ((disk = IOIteratorNext (disk_list)) != 0)
 307         {
 308                 props_dict = NULL;
 309                 stats_dict = NULL;
 310                 child_dict = NULL;
 311
 312                 /* `disk_child' must be released */
 313                 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child))
 314                                 != kIOReturnSuccess)
 315                 {
 316                         /* This fails for example for DVD/CD drives.. */
 317                         DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
 318                         IOObjectRelease (disk);
 319                         continue;
 320                 }
 321
 322                 /* We create `props_dict' => we need to release it later */
 323                 if (IORegistryEntryCreateCFProperties (disk,
 324                                         (CFMutableDictionaryRef *) &props_dict,
 325                                         kCFAllocatorDefault,
 326                                         kNilOptions)
 327                                 != kIOReturnSuccess)
 328                 {
 329                         ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
 330                         IOObjectRelease (disk_child);
 331                         IOObjectRelease (disk);
 332                         continue;
 333                 }
 334
 335                 if (props_dict == NULL)
 336                 {
 337                         DEBUG ("IORegistryEntryCreateCFProperties (disk) failed.");
 338                         IOObjectRelease (disk_child);
 339                         IOObjectRelease (disk);
 340                         continue;
 341                 }
 342
 343                 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict,
 344                                 CFSTR (kIOBlockStorageDriverStatisticsKey));
 345
 346                 if (stats_dict == NULL)
 347                 {
 348                         DEBUG ("CFDictionaryGetValue (%s) failed.",
 349                                         kIOBlockStorageDriverStatisticsKey);
 350                         CFRelease (props_dict);
 351                         IOObjectRelease (disk_child);
 352                         IOObjectRelease (disk);
 353                         continue;
 354                 }
 355
 356                 if (IORegistryEntryCreateCFProperties (disk_child,
 357                                         (CFMutableDictionaryRef *) &child_dict,
 358                                         kCFAllocatorDefault,
 359                                         kNilOptions)
 360                                 != kIOReturnSuccess)
 361                 {
 362                         DEBUG ("IORegistryEntryCreateCFProperties (disk_child) failed.");
 363                         IOObjectRelease (disk_child);
 364                         CFRelease (props_dict);
 365                         IOObjectRelease (disk);
 366                         continue;
 367                 }
 368
 369                 /* kIOBSDNameKey */
 370                 disk_major = (int) dict_get_value (child_dict,
 371                                 kIOBSDMajorKey);
 372                 disk_minor = (int) dict_get_value (child_dict,
 373                                 kIOBSDMinorKey);
 374                 read_ops  = dict_get_value (stats_dict,
 375                                 kIOBlockStorageDriverStatisticsReadsKey);
 376                 read_byt  = dict_get_value (stats_dict,
 377                                 kIOBlockStorageDriverStatisticsBytesReadKey);
 378                 read_tme  = dict_get_value (stats_dict,
 379                                 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
 380                 write_ops = dict_get_value (stats_dict,
 381                                 kIOBlockStorageDriverStatisticsWritesKey);
 382                 write_byt = dict_get_value (stats_dict,
 383                                 kIOBlockStorageDriverStatisticsBytesWrittenKey);
 384                 /* This property describes the number of nanoseconds spent
 385                  * performing writes since the block storage driver was
 386                  * instantiated. It is one of the statistic entries listed
 387                  * under the top-level kIOBlockStorageDriverStatisticsKey
 388                  * property table. It has an OSNumber value. */
 389                 write_tme = dict_get_value (stats_dict,
 390                                 kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
 391
 392                 if (ssnprintf (disk_name, sizeof (disk_name),
 393                                 "%i-%i", disk_major, disk_minor) >= sizeof (disk_name))
 394                 {
 395                         DEBUG ("snprintf (major, minor) failed.");
 396                         CFRelease (child_dict);
 397                         IOObjectRelease (disk_child);
 398                         CFRelease (props_dict);
 399                         IOObjectRelease (disk);
 400                         continue;
 401                 }
 402                 DEBUG ("disk_name = %s", disk_name);
 403
 404                 if ((read_byt != -1LL) || (write_byt != -1LL))
 405                         disk_submit (disk_name, "disk_octets", read_byt, write_byt);
 406                 if ((read_ops != -1LL) || (write_ops != -1LL))
 407                         disk_submit (disk_name, "disk_ops", read_ops, write_ops);
 408                 if ((read_tme != -1LL) || (write_tme != -1LL))
 409                         disk_submit (disk_name, "disk_time",
 410                                         read_tme / 1000,
 411                                         write_tme / 1000);
 412
 413                 CFRelease (child_dict);
 414                 IOObjectRelease (disk_child);
 415                 CFRelease (props_dict);
 416                 IOObjectRelease (disk);
 417         }
 418         IOObjectRelease (disk_list);
 419 /* #endif HAVE_IOKIT_IOKITLIB_H */
 420
 421 #elif KERNEL_LINUX
 422         FILE *fh;
 423         char buffer[1024];
 424
 425         char *fields[32];
 426         int numfields;
 427         int fieldshift = 0;
 428
 429         int minor = 0;
 430
 431         counter_t read_sectors  = 0;
 432         counter_t write_sectors = 0;
 433
 434         counter_t read_ops      = 0;
 435         counter_t read_merged   = 0;
 436         counter_t read_time     = 0;
 437         counter_t write_ops     = 0;
 438         counter_t write_merged  = 0;
 439         counter_t write_time    = 0;
 440         int is_disk = 0;
 441
 442         diskstats_t *ds, *pre_ds;
 443
 444         if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
 445         {
 446                 fh = fopen ("/proc/partitions", "r");
 447                 if (fh == NULL)
 448                 {
 449                         ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
 450                         return (-1);
 451                 }
 452
 453                 /* Kernel is 2.4.* */
 454                 fieldshift = 1;
 455         }
 456
 457         while (fgets (buffer, sizeof (buffer), fh) != NULL)
 458         {
 459                 char *disk_name;
 460
 461                 numfields = strsplit (buffer, fields, 32);
 462
 463                 if ((numfields != (14 + fieldshift)) && (numfields != 7))
 464                         continue;
 465
 466                 minor = atoll (fields[1]);
 467
 468                 disk_name = fields[2 + fieldshift];
 469
 470                 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
 471                         if (strcmp (disk_name, ds->name) == 0)
 472                                 break;
 473
 474                 if (ds == NULL)
 475                 {
 476                         if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
 477                                 continue;
 478
 479                         if ((ds->name = strdup (disk_name)) == NULL)
 480                         {
 481                                 free (ds);
 482                                 continue;
 483                         }
 484
 485                         if (pre_ds == NULL)
 486                                 disklist = ds;
 487                         else
 488                                 pre_ds->next = ds;
 489                 }
 490
 491                 is_disk = 0;
 492                 if (numfields == 7)
 493                 {
 494                         /* Kernel 2.6, Partition */
 495                         read_ops      = atoll (fields[3]);
 496                         read_sectors  = atoll (fields[4]);
 497                         write_ops     = atoll (fields[5]);
 498                         write_sectors = atoll (fields[6]);
 499                 }
 500                 else if (numfields == (14 + fieldshift))
 501                 {
 502                         read_ops  =  atoll (fields[3 + fieldshift]);
 503                         write_ops =  atoll (fields[7 + fieldshift]);
 504
 505                         read_sectors  = atoll (fields[5 + fieldshift]);
 506                         write_sectors = atoll (fields[9 + fieldshift]);
 507
 508                         if ((fieldshift == 0) || (minor == 0))
 509                         {
 510                                 is_disk = 1;
 511                                 read_merged  = atoll (fields[4 + fieldshift]);
 512                                 read_time    = atoll (fields[6 + fieldshift]);
 513                                 write_merged = atoll (fields[8 + fieldshift]);
 514                                 write_time   = atoll (fields[10+ fieldshift]);
 515                         }
 516                 }
 517                 else
 518                 {
 519                         DEBUG ("numfields = %i; => unknown file format.", numfields);
 520                         continue;
 521                 }
 522
 523                 {
 524                         counter_t diff_read_sectors;
 525                         counter_t diff_write_sectors;
 526
 527                 /* If the counter wraps around, it's only 32 bits.. */
 528                         if (read_sectors < ds->read_sectors)
 529                                 diff_read_sectors = 1 + read_sectors
 530                                         + (UINT_MAX - ds->read_sectors);
 531                         else
 532                                 diff_read_sectors = read_sectors - ds->read_sectors;
 533                         if (write_sectors < ds->write_sectors)
 534                                 diff_write_sectors = 1 + write_sectors
 535                                         + (UINT_MAX - ds->write_sectors);
 536                         else
 537                                 diff_write_sectors = write_sectors - ds->write_sectors;
 538
 539                         ds->read_bytes += 512 * diff_read_sectors;
 540                         ds->write_bytes += 512 * diff_write_sectors;
 541                         ds->read_sectors = read_sectors;
 542                         ds->write_sectors = write_sectors;
 543                 }
 544
 545                 /* Calculate the average time an io-op needs to complete */
 546                 if (is_disk)
 547                 {
 548                         counter_t diff_read_ops;
 549                         counter_t diff_write_ops;
 550                         counter_t diff_read_time;
 551                         counter_t diff_write_time;
 552
 553                         if (read_ops < ds->read_ops)
 554                                 diff_read_ops = 1 + read_ops
 555                                         + (UINT_MAX - ds->read_ops);
 556                         else
 557                                 diff_read_ops = read_ops - ds->read_ops;
 558                         DEBUG ("disk plugin: disk_name = %s; read_ops = %llu; "
 559                                         "ds->read_ops = %llu; diff_read_ops = %llu;",
 560                                         disk_name,
 561                                         read_ops, ds->read_ops, diff_read_ops);
 562
 563                         if (write_ops < ds->write_ops)
 564                                 diff_write_ops = 1 + write_ops
 565                                         + (UINT_MAX - ds->write_ops);
 566                         else
 567                                 diff_write_ops = write_ops - ds->write_ops;
 568
 569                         if (read_time < ds->read_time)
 570                                 diff_read_time = 1 + read_time
 571                                         + (UINT_MAX - ds->read_time);
 572                         else
 573                                 diff_read_time = read_time - ds->read_time;
 574
 575                         if (write_time < ds->write_time)
 576                                 diff_write_time = 1 + write_time
 577                                         + (UINT_MAX - ds->write_time);
 578                         else
 579                                 diff_write_time = write_time - ds->write_time;
 580
 581                         if (diff_read_ops != 0)
 582                                 ds->avg_read_time += (diff_read_time
 583                                                 + (diff_read_ops / 2))
 584                                         / diff_read_ops;
 585                         if (diff_write_ops != 0)
 586                                 ds->avg_write_time += (diff_write_time
 587                                                 + (diff_write_ops / 2))
 588                                         / diff_write_ops;
 589
 590                         ds->read_ops = read_ops;
 591                         ds->read_time = read_time;
 592                         ds->write_ops = write_ops;
 593                         ds->write_time = write_time;
 594                 } /* if (is_disk) */
 595
 596                 /* Don't write to the RRDs if we've just started.. */
 597                 ds->poll_count++;
 598                 if (ds->poll_count <= 2)
 599                 {
 600                         DEBUG ("disk plugin: (ds->poll_count = %i) <= "
 601                                         "(min_poll_count = 2); => Not writing.",
 602                                         ds->poll_count);
 603                         continue;
 604                 }
 605
 606                 if ((read_ops == 0) && (write_ops == 0))
 607                 {
 608                         DEBUG ("disk plugin: ((read_ops == 0) && "
 609                                         "(write_ops == 0)); => Not writing.");
 610                         continue;
 611                 }
 612
 613                 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
 614                         disk_submit (disk_name, "disk_octets",
 615                                         ds->read_bytes, ds->write_bytes);
 616
 617                 if ((ds->read_ops != 0) || (ds->write_ops != 0))
 618                         disk_submit (disk_name, "disk_ops",
 619                                         read_ops, write_ops);
 620
 621                 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
 622                         disk_submit (disk_name, "disk_time",
 623                                         ds->avg_read_time, ds->avg_write_time);
 624
 625                 if (is_disk)
 626                 {
 627                         disk_submit (disk_name, "disk_merged",
 628                                         read_merged, write_merged);
 629                 } /* if (is_disk) */
 630         } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
 631
 632         fclose (fh);
 633 /* #endif defined(KERNEL_LINUX) */
 634
 635 #elif HAVE_LIBKSTAT
 636 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
 637 #  define KIO_ROCTETS reads
 638 #  define KIO_WOCTETS writes
 639 #  define KIO_ROPS    nreads
 640 #  define KIO_WOPS    nwrites
 641 #  define KIO_RTIME   rtime
 642 #  define KIO_WTIME   wtime
 643 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
 644 #  define KIO_ROCTETS nread
 645 #  define KIO_WOCTETS nwritten
 646 #  define KIO_ROPS    reads
 647 #  define KIO_WOPS    writes
 648 #  define KIO_RTIME   rtime
 649 #  define KIO_WTIME   wtime
 650 # else
 651 #  error "kstat_io_t does not have the required members"
 652 # endif
 653         static kstat_io_t kio;
 654         int i;
 655
 656         if (kc == NULL)
 657                 return (-1);
 658
 659         for (i = 0; i < numdisk; i++)
 660         {
 661                 if (kstat_read (kc, ksp[i], &kio) == -1)
 662                         continue;
 663
 664                 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
 665                 {
 666                         disk_submit (ksp[i]->ks_name, "disk_octets",
 667                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 668                         disk_submit (ksp[i]->ks_name, "disk_ops",
 669                                         kio.KIO_ROPS, kio.KIO_WOPS);
 670                         /* FIXME: Convert this to microseconds if necessary */
 671                         disk_submit (ksp[i]->ks_name, "disk_time",
 672                                         kio.KIO_RTIME, kio.KIO_WTIME);
 673                 }
 674                 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
 675                 {
 676                         disk_submit (ksp[i]->ks_name, "disk_octets",
 677                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 678                         disk_submit (ksp[i]->ks_name, "disk_ops",
 679                                         kio.KIO_ROPS, kio.KIO_WOPS);
 680                 }
 681         }
 682 /* #endif defined(HAVE_LIBKSTAT) */
 683
 684 #elif defined(HAVE_LIBSTATGRAB)
 685         sg_disk_io_stats *ds;
 686         int disks, counter;
 687         char name[DATA_MAX_NAME_LEN];
 688
 689         if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
 690                 return (0);
 691
 692         for (counter=0; counter < disks; counter++) {
 693                 strncpy(name, ds->disk_name, sizeof(name));
 694                 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
 695                 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
 696                 ds++;
 697         }
 698 /* #endif defined(HAVE_LIBSTATGRAB) */
 699
 700 #elif defined(HAVE_PERFSTAT)
 701         counter_t read_sectors;
 702         counter_t write_sectors;
 703         counter_t read_time;
 704         counter_t write_time;
 705         counter_t read_ops;
 706         counter_t write_ops;
 707         perfstat_id_t firstpath;
 708         int rnumdisk;
 709         int i;
 710
 711         if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
 712         {
 713                 char errbuf[1024];
 714                 WARNING ("disk plugin: perfstat_disk: %s",
 715                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 716                 return (-1);
 717         }
 718
 719         if (numdisk != pnumdisk || stat_disk==NULL) {
 720                 if (stat_disk!=NULL)
 721                         free(stat_disk);
 722                 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
 723         }
 724         pnumdisk = numdisk;
 725
 726         firstpath.name[0]='\0';
 727         if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
 728         {
 729                 char errbuf[1024];
 730                 WARNING ("disk plugin: perfstat_disk : %s",
 731                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 732                 return (-1);
 733         }
 734
 735         for (i = 0; i < rnumdisk; i++)
 736         {
 737                 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
 738                 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
 739                 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
 740
 741                 read_ops = stat_disk[i].xrate;
 742                 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
 743                 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
 744
 745                 read_time = stat_disk[i].rserv;
 746                 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
 747                 write_time = stat_disk[i].wserv;
 748                 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
 749                 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
 750         }
 751 #endif /* defined(HAVE_PERFSTAT) */
 752
 753         return (0);
 754 } /* int disk_read */
 755
 756 void module_register (void)
 757 {
 758   plugin_register_config ("disk", disk_config,
 759       config_keys, config_keys_num);
 760   plugin_register_init ("disk", disk_init);
 761   plugin_register_read ("disk", disk_read);
 762 } /* void module_register */