src/disk.c

   1 /**
   2  * collectd - src/disk.c
   3  * Copyright (C) 2005-2012  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 collectd.org>
  21  *   Manuel Sanmartin
  22  **/
  23
  24 #include "collectd.h"
  25
  26 #include "common.h"
  27 #include "plugin.h"
  28 #include "utils_ignorelist.h"
  29
  30 #if HAVE_MACH_MACH_TYPES_H
  31 #  include <mach/mach_types.h>
  32 #endif
  33 #if HAVE_MACH_MACH_INIT_H
  34 #  include <mach/mach_init.h>
  35 #endif
  36 #if HAVE_MACH_MACH_ERROR_H
  37 #  include <mach/mach_error.h>
  38 #endif
  39 #if HAVE_MACH_MACH_PORT_H
  40 #  include <mach/mach_port.h>
  41 #endif
  42 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
  43 #  include <CoreFoundation/CoreFoundation.h>
  44 #endif
  45 #if HAVE_IOKIT_IOKITLIB_H
  46 #  include <IOKit/IOKitLib.h>
  47 #endif
  48 #if HAVE_IOKIT_IOTYPES_H
  49 #  include <IOKit/IOTypes.h>
  50 #endif
  51 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
  52 #  include <IOKit/storage/IOBlockStorageDriver.h>
  53 #endif
  54 #if HAVE_IOKIT_IOBSD_H
  55 #  include <IOKit/IOBSD.h>
  56 #endif
  57 #if KERNEL_FREEBSD
  58 #include <devstat.h>
  59 #include <libgeom.h>
  60 #endif
  61
  62 #if HAVE_LIMITS_H
  63 # include <limits.h>
  64 #endif
  65 #ifndef UINT_MAX
  66 #  define UINT_MAX 4294967295U
  67 #endif
  68
  69 #if HAVE_STATGRAB_H
  70 # include <statgrab.h>
  71 #endif
  72
  73 #if HAVE_PERFSTAT
  74 # ifndef _AIXVERSION_610
  75 # include <sys/systemcfg.h>
  76 # endif
  77 # include <sys/protosw.h>
  78 # include <libperfstat.h>
  79 #endif
  80
  81 #if HAVE_IOKIT_IOKITLIB_H
  82 static mach_port_t io_master_port = MACH_PORT_NULL;
  83 /* This defaults to false for backwards compatibility. Please fix in the next
  84  * major version. */
  85 static _Bool use_bsd_name = 0;
  86 /* #endif HAVE_IOKIT_IOKITLIB_H */
  87
  88 #elif KERNEL_LINUX
  89 typedef struct diskstats
  90 {
  91         char *name;
  92
  93         /* This overflows in roughly 1361 years */
  94         unsigned int poll_count;
  95
  96         derive_t read_sectors;
  97         derive_t write_sectors;
  98
  99         derive_t read_bytes;
 100         derive_t write_bytes;
 101
 102         derive_t read_ops;
 103         derive_t write_ops;
 104         derive_t read_time;
 105         derive_t write_time;
 106
 107         derive_t avg_read_time;
 108         derive_t avg_write_time;
 109
 110         _Bool has_merged;
 111         _Bool has_in_progress;
 112         _Bool has_io_time;
 113
 114         struct diskstats *next;
 115 } diskstats_t;
 116
 117 static diskstats_t *disklist;
 118 /* #endif KERNEL_LINUX */
 119 #elif KERNEL_FREEBSD
 120 static struct gmesh geom_tree;
 121 /* #endif KERNEL_FREEBSD */
 122
 123 #elif HAVE_LIBKSTAT
 124 #define MAX_NUMDISK 1024
 125 extern kstat_ctl_t *kc;
 126 static kstat_t *ksp[MAX_NUMDISK];
 127 static int numdisk = 0;
 128 /* #endif HAVE_LIBKSTAT */
 129
 130 #elif defined(HAVE_LIBSTATGRAB)
 131 /* #endif HAVE_LIBSTATGRAB */
 132
 133 #elif HAVE_PERFSTAT
 134 static perfstat_disk_t * stat_disk;
 135 static int numdisk;
 136 static int pnumdisk;
 137 /* #endif HAVE_PERFSTAT */
 138
 139 #else
 140 # error "No applicable input method."
 141 #endif
 142
 143 #if HAVE_LIBUDEV
 144 #include <libudev.h>
 145
 146 static char *conf_udev_name_attr = NULL;
 147 static struct udev *handle_udev;
 148 #endif
 149
 150 static const char *config_keys[] =
 151 {
 152         "Disk",
 153         "UseBSDName",
 154         "IgnoreSelected",
 155         "UdevNameAttr"
 156 };
 157 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 158
 159 static ignorelist_t *ignorelist = NULL;
 160
 161 static int disk_config (const char *key, const char *value)
 162 {
 163   if (ignorelist == NULL)
 164     ignorelist = ignorelist_create (/* invert = */ 1);
 165   if (ignorelist == NULL)
 166     return (1);
 167
 168   if (strcasecmp ("Disk", key) == 0)
 169   {
 170     ignorelist_add (ignorelist, value);
 171   }
 172   else if (strcasecmp ("IgnoreSelected", key) == 0)
 173   {
 174     int invert = 1;
 175     if (IS_TRUE (value))
 176       invert = 0;
 177     ignorelist_set_invert (ignorelist, invert);
 178   }
 179   else if (strcasecmp ("UseBSDName", key) == 0)
 180   {
 181 #if HAVE_IOKIT_IOKITLIB_H
 182     use_bsd_name = IS_TRUE (value) ? 1 : 0;
 183 #else
 184     WARNING ("disk plugin: The \"UseBSDName\" option is only supported "
 185         "on Mach / Mac OS X and will be ignored.");
 186 #endif
 187   }
 188   else if (strcasecmp ("UdevNameAttr", key) == 0)
 189   {
 190 #if HAVE_LIBUDEV
 191     if (conf_udev_name_attr != NULL)
 192     {
 193       free (conf_udev_name_attr);
 194       conf_udev_name_attr = NULL;
 195     }
 196     if ((conf_udev_name_attr = strdup (value)) == NULL)
 197       return (1);
 198 #else
 199     WARNING ("disk plugin: The \"UdevNameAttr\" option is only supported "
 200         "if collectd is built with libudev support");
 201 #endif
 202   }
 203   else
 204   {
 205     return (-1);
 206   }
 207
 208   return (0);
 209 } /* int disk_config */
 210
 211 static int disk_init (void)
 212 {
 213 #if HAVE_IOKIT_IOKITLIB_H
 214         kern_return_t status;
 215
 216         if (io_master_port != MACH_PORT_NULL)
 217         {
 218                 mach_port_deallocate (mach_task_self (),
 219                                 io_master_port);
 220                 io_master_port = MACH_PORT_NULL;
 221         }
 222
 223         status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
 224         if (status != kIOReturnSuccess)
 225         {
 226                 ERROR ("IOMasterPort failed: %s",
 227                                 mach_error_string (status));
 228                 io_master_port = MACH_PORT_NULL;
 229                 return (-1);
 230         }
 231 /* #endif HAVE_IOKIT_IOKITLIB_H */
 232
 233 #elif KERNEL_LINUX
 234 #if HAVE_LIBUDEV
 235         if (conf_udev_name_attr != NULL)
 236         {
 237                 handle_udev = udev_new();
 238                 if (handle_udev == NULL) {
 239                         ERROR ("disk plugin: udev_new() failed!");
 240                         return (-1);
 241                 }
 242         }
 243 #endif /* HAVE_LIBUDEV */
 244 /* #endif KERNEL_LINUX */
 245
 246 #elif KERNEL_FREEBSD
 247         int rv;
 248
 249         rv = geom_gettree(&geom_tree);
 250         if (rv != 0) {
 251                 ERROR ("geom_gettree() failed, returned %d", rv);
 252                 return (-1);
 253         }
 254         rv = geom_stats_open();
 255         if (rv != 0) {
 256                 ERROR ("geom_stats_open() failed, returned %d", rv);
 257                 return (-1);
 258         }
 259 /* #endif KERNEL_FREEBSD */
 260
 261 #elif HAVE_LIBKSTAT
 262         kstat_t *ksp_chain;
 263
 264         numdisk = 0;
 265
 266         if (kc == NULL)
 267                 return (-1);
 268
 269         for (numdisk = 0, ksp_chain = kc->kc_chain;
 270                         (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
 271                         ksp_chain = ksp_chain->ks_next)
 272         {
 273                 if (strncmp (ksp_chain->ks_class, "disk", 4)
 274                                 && strncmp (ksp_chain->ks_class, "partition", 9))
 275                         continue;
 276                 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
 277                         continue;
 278                 ksp[numdisk++] = ksp_chain;
 279         }
 280 #endif /* HAVE_LIBKSTAT */
 281
 282         return (0);
 283 } /* int disk_init */
 284
 285 static int disk_shutdown (void)
 286 {
 287 #if KERNEL_LINUX
 288 #if HAVE_LIBUDEV
 289         if (handle_udev != NULL)
 290                 udev_unref(handle_udev);
 291 #endif /* HAVE_LIBUDEV */
 292 #endif /* KERNEL_LINUX */
 293         return (0);
 294 } /* int disk_shutdown */
 295
 296 static void disk_submit (const char *plugin_instance,
 297                 const char *type,
 298                 derive_t read, derive_t write)
 299 {
 300         value_list_t vl = VALUE_LIST_INIT;
 301         value_t values[] = {
 302                 { .derive = read },
 303                 { .derive = write },
 304         };
 305
 306         vl.values = values;
 307         vl.values_len = STATIC_ARRAY_SIZE (values);
 308         sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
 309         sstrncpy (vl.plugin_instance, plugin_instance,
 310                         sizeof (vl.plugin_instance));
 311         sstrncpy (vl.type, type, sizeof (vl.type));
 312
 313         plugin_dispatch_values (&vl);
 314 } /* void disk_submit */
 315
 316 #if KERNEL_FREEBSD || KERNEL_LINUX
 317 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
 318 {
 319         value_list_t vl = VALUE_LIST_INIT;
 320         value_t values[] = {
 321                 { .derive = io_time },
 322                 { .derive = weighted_time },
 323         };
 324
 325         vl.values = values;
 326         vl.values_len = STATIC_ARRAY_SIZE (values);
 327         sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
 328         sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
 329         sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
 330
 331         plugin_dispatch_values (&vl);
 332 } /* void submit_io_time */
 333 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
 334
 335 #if KERNEL_LINUX
 336 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
 337 {
 338         value_list_t vl = VALUE_LIST_INIT;
 339
 340         vl.values = &(value_t) { .gauge = in_progress };
 341         vl.values_len = 1;
 342         sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
 343         sstrncpy (vl.plugin_instance, disk_name, sizeof (vl.plugin_instance));
 344         sstrncpy (vl.type, "pending_operations", sizeof (vl.type));
 345
 346         plugin_dispatch_values (&vl);
 347 }
 348
 349 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
 350 {
 351         double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
 352         double avg_time = ((double) delta_time) / ((double) delta_ops);
 353         double avg_time_incr = interval * avg_time;
 354
 355         return ((counter_t) (avg_time_incr + .5));
 356 }
 357 #endif
 358
 359 #if HAVE_LIBUDEV
 360 /**
 361  * Attempt to provide an rename disk instance from an assigned udev attribute.
 362  *
 363  * On success, it returns a strduped char* to the desired attribute value.
 364  * Otherwise it returns NULL.
 365  */
 366
 367 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
 368 {
 369         struct udev_device *dev;
 370         const char *prop;
 371         char *output = NULL;
 372
 373         dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
 374         if (dev != NULL)
 375         {
 376                 prop = udev_device_get_property_value (dev, attr);
 377                 if (prop) {
 378                         output = strdup (prop);
 379                         DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
 380                 }
 381                 udev_device_unref (dev);
 382         }
 383         return output;
 384 }
 385 #endif
 386
 387 #if HAVE_IOKIT_IOKITLIB_H
 388 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
 389 {
 390         signed long long val_int;
 391         CFNumberRef      val_obj;
 392         CFStringRef      key_obj;
 393
 394         /* `key_obj' needs to be released. */
 395         key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
 396                         kCFStringEncodingASCII);
 397         if (key_obj == NULL)
 398         {
 399                 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
 400                 return (-1LL);
 401         }
 402
 403         /* get => we don't need to release (== free) the object */
 404         val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
 405
 406         CFRelease (key_obj);
 407
 408         if (val_obj == NULL)
 409         {
 410                 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
 411                 return (-1LL);
 412         }
 413
 414         if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
 415         {
 416                 DEBUG ("CFNumberGetValue (%s) failed.", key);
 417                 return (-1LL);
 418         }
 419
 420         return (val_int);
 421 }
 422 #endif /* HAVE_IOKIT_IOKITLIB_H */
 423
 424 static int disk_read (void)
 425 {
 426 #if HAVE_IOKIT_IOKITLIB_H
 427         io_registry_entry_t     disk;
 428         io_registry_entry_t     disk_child;
 429         io_iterator_t           disk_list;
 430         CFMutableDictionaryRef  props_dict, child_dict;
 431         CFDictionaryRef         stats_dict;
 432         CFStringRef             tmp_cf_string_ref;
 433         kern_return_t           status;
 434
 435         signed long long read_ops, read_byt, read_tme;
 436         signed long long write_ops, write_byt, write_tme;
 437
 438         int  disk_major, disk_minor;
 439         char disk_name[DATA_MAX_NAME_LEN];
 440         char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
 441
 442         /* Get the list of all disk objects. */
 443         if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
 444                 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
 445                 return (-1);
 446         }
 447
 448         while ((disk = IOIteratorNext (disk_list)) != 0) {
 449                 props_dict = NULL;
 450                 stats_dict = NULL;
 451                 child_dict = NULL;
 452
 453                 /* get child of disk entry and corresponding property dictionary */
 454                 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
 455                         /* This fails for example for DVD/CD drives, which we want to ignore anyway */
 456                         DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
 457                         IOObjectRelease (disk);
 458                         continue;
 459                 }
 460                 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
 461                         ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
 462                         IOObjectRelease (disk_child);
 463                         IOObjectRelease (disk);
 464                         continue;
 465                 }
 466
 467                 /* extract name and major/minor numbers */
 468                 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
 469                 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
 470                 if (tmp_cf_string_ref) {
 471                         assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
 472                         CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
 473                 }
 474                 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
 475                 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
 476                 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
 477                 CFRelease (child_dict);
 478                 IOObjectRelease (disk_child);
 479
 480                 /* get property dictionary of the disk entry itself */
 481                 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
 482                         ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
 483                         IOObjectRelease (disk);
 484                         continue;
 485                 }
 486
 487                 /* extract name and stats dictionary */
 488                 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
 489                 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
 490                 if (tmp_cf_string_ref) {
 491                         assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
 492                         CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
 493                 }
 494                 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
 495                 if (stats_dict == NULL) {
 496                         ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
 497                         CFRelease (props_dict);
 498                         IOObjectRelease (disk);
 499                         continue;
 500                 }
 501                 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
 502
 503                 /* choose name */
 504                 if (use_bsd_name) {
 505                         if (child_disk_name_bsd[0] != 0)
 506                                 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
 507                         else if (props_disk_name_bsd[0] != 0)
 508                                 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
 509                         else {
 510                                 ERROR ("disk plugin: can't find bsd disk name.");
 511                                 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
 512                         }
 513                 }
 514                 else
 515                         ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
 516
 517                 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
 518
 519                 /* check the name against ignore list */
 520                 if (ignorelist_match (ignorelist, disk_name) != 0) {
 521                         CFRelease (props_dict);
 522                         IOObjectRelease (disk);
 523                         continue;
 524                 }
 525
 526                 /* extract the stats */
 527                 read_ops  = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
 528                 read_byt  = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
 529                 read_tme  = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
 530                 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
 531                 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
 532                 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
 533                 CFRelease (props_dict);
 534                 IOObjectRelease (disk);
 535
 536                 /* and submit */
 537                 if ((read_byt != -1LL) || (write_byt != -1LL))
 538                         disk_submit (disk_name, "disk_octets", read_byt, write_byt);
 539                 if ((read_ops != -1LL) || (write_ops != -1LL))
 540                         disk_submit (disk_name, "disk_ops", read_ops, write_ops);
 541                 if ((read_tme != -1LL) || (write_tme != -1LL))
 542                         disk_submit (disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
 543
 544         }
 545         IOObjectRelease (disk_list);
 546 /* #endif HAVE_IOKIT_IOKITLIB_H */
 547
 548 #elif KERNEL_FREEBSD
 549         int retry, dirty;
 550
 551         void *snap = NULL;
 552         struct devstat *snap_iter;
 553
 554         struct gident *geom_id;
 555
 556         const char *disk_name;
 557         long double read_time, write_time, busy_time, total_duration;
 558
 559         for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
 560                 if (snap != NULL)
 561                         geom_stats_snapshot_free(snap);
 562
 563                 /* Get a fresh copy of stats snapshot */
 564                 snap = geom_stats_snapshot_get();
 565                 if (snap == NULL) {
 566                         ERROR("disk plugin: geom_stats_snapshot_get() failed.");
 567                         return (-1);
 568                 }
 569
 570                 /* Check if we have dirty read from this snapshot */
 571                 dirty = 0;
 572                 geom_stats_snapshot_reset(snap);
 573                 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
 574                         if (snap_iter->id == NULL)
 575                                 continue;
 576                         geom_id = geom_lookupid(&geom_tree, snap_iter->id);
 577
 578                         /* New device? refresh GEOM tree */
 579                         if (geom_id == NULL) {
 580                                 geom_deletetree(&geom_tree);
 581                                 if (geom_gettree(&geom_tree) != 0) {
 582                                         ERROR("disk plugin: geom_gettree() failed");
 583                                         geom_stats_snapshot_free(snap);
 584                                         return (-1);
 585                                 }
 586                                 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
 587                         }
 588                         /*
 589                          * This should be rare: the device come right before we take the
 590                          * snapshot and went away right after it.  We will handle this
 591                          * case later, so don't mark dirty but silently ignore it.
 592                          */
 593                         if (geom_id == NULL)
 594                                 continue;
 595
 596                         /* Only collect PROVIDER data */
 597                         if (geom_id->lg_what != ISPROVIDER)
 598                                 continue;
 599
 600                         /* Only collect data when rank is 1 (physical devices) */
 601                         if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
 602                                 continue;
 603
 604                         /* Check if this is a dirty read quit for another try */
 605                         if (snap_iter->sequence0 != snap_iter->sequence1) {
 606                                 dirty = 1;
 607                                 break;
 608                         }
 609                 }
 610         }
 611
 612         /* Reset iterator */
 613         geom_stats_snapshot_reset(snap);
 614         for (;;) {
 615                 snap_iter = geom_stats_snapshot_next(snap);
 616                 if (snap_iter == NULL)
 617                         break;
 618
 619                 if (snap_iter->id == NULL)
 620                         continue;
 621                 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
 622                 if (geom_id == NULL)
 623                         continue;
 624                 if (geom_id->lg_what != ISPROVIDER)
 625                         continue;
 626                 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
 627                         continue;
 628                 /* Skip dirty reads, if present */
 629                 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
 630                         continue;
 631
 632                 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
 633
 634                 if (ignorelist_match (ignorelist, disk_name) != 0)
 635                         continue;
 636
 637                 if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
 638                         disk_submit(disk_name, "disk_octets",
 639                                         (derive_t)snap_iter->bytes[DEVSTAT_READ],
 640                                         (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
 641                 }
 642
 643                 if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
 644                         disk_submit(disk_name, "disk_ops",
 645                                         (derive_t)snap_iter->operations[DEVSTAT_READ],
 646                                         (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
 647                 }
 648
 649                 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
 650                 write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
 651                 if ((read_time != 0) || (write_time != 0)) {
 652                         disk_submit (disk_name, "disk_time",
 653                                         (derive_t)(read_time*1000), (derive_t)(write_time*1000));
 654                 }
 655                 if (devstat_compute_statistics(snap_iter, NULL, 1.0,
 656                     DSM_TOTAL_BUSY_TIME, &busy_time,
 657                     DSM_TOTAL_DURATION, &total_duration,
 658                     DSM_NONE) != 0) {
 659                         WARNING("%s", devstat_errbuf);
 660                 }
 661                 else
 662                 {
 663                         submit_io_time(disk_name, busy_time, total_duration);
 664                 }
 665         }
 666         geom_stats_snapshot_free(snap);
 667
 668 #elif KERNEL_LINUX
 669         FILE *fh;
 670         char buffer[1024];
 671
 672         char *fields[32];
 673         int numfields;
 674         int fieldshift = 0;
 675
 676         int minor = 0;
 677
 678         derive_t read_sectors  = 0;
 679         derive_t write_sectors = 0;
 680
 681         derive_t read_ops      = 0;
 682         derive_t read_merged   = 0;
 683         derive_t read_time     = 0;
 684         derive_t write_ops     = 0;
 685         derive_t write_merged  = 0;
 686         derive_t write_time    = 0;
 687         gauge_t in_progress    = NAN;
 688         derive_t io_time       = 0;
 689         derive_t weighted_time = 0;
 690         int is_disk = 0;
 691
 692         diskstats_t *ds, *pre_ds;
 693
 694         if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
 695         {
 696                 fh = fopen ("/proc/partitions", "r");
 697                 if (fh == NULL)
 698                 {
 699                         ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
 700                         return (-1);
 701                 }
 702
 703                 /* Kernel is 2.4.* */
 704                 fieldshift = 1;
 705         }
 706
 707         while (fgets (buffer, sizeof (buffer), fh) != NULL)
 708         {
 709                 char *disk_name;
 710                 char *output_name;
 711
 712                 numfields = strsplit (buffer, fields, 32);
 713
 714                 if ((numfields != (14 + fieldshift)) && (numfields != 7))
 715                         continue;
 716
 717                 minor = atoll (fields[1]);
 718
 719                 disk_name = fields[2 + fieldshift];
 720
 721                 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
 722                         if (strcmp (disk_name, ds->name) == 0)
 723                                 break;
 724
 725                 if (ds == NULL)
 726                 {
 727                         if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
 728                                 continue;
 729
 730                         if ((ds->name = strdup (disk_name)) == NULL)
 731                         {
 732                                 free (ds);
 733                                 continue;
 734                         }
 735
 736                         if (pre_ds == NULL)
 737                                 disklist = ds;
 738                         else
 739                                 pre_ds->next = ds;
 740                 }
 741
 742                 is_disk = 0;
 743                 if (numfields == 7)
 744                 {
 745                         /* Kernel 2.6, Partition */
 746                         read_ops      = atoll (fields[3]);
 747                         read_sectors  = atoll (fields[4]);
 748                         write_ops     = atoll (fields[5]);
 749                         write_sectors = atoll (fields[6]);
 750                 }
 751                 else if (numfields == (14 + fieldshift))
 752                 {
 753                         read_ops  =  atoll (fields[3 + fieldshift]);
 754                         write_ops =  atoll (fields[7 + fieldshift]);
 755
 756                         read_sectors  = atoll (fields[5 + fieldshift]);
 757                         write_sectors = atoll (fields[9 + fieldshift]);
 758
 759                         if ((fieldshift == 0) || (minor == 0))
 760                         {
 761                                 is_disk = 1;
 762                                 read_merged  = atoll (fields[4 + fieldshift]);
 763                                 read_time    = atoll (fields[6 + fieldshift]);
 764                                 write_merged = atoll (fields[8 + fieldshift]);
 765                                 write_time   = atoll (fields[10+ fieldshift]);
 766
 767                                 in_progress = atof (fields[11 + fieldshift]);
 768
 769                                 io_time       = atof (fields[12 + fieldshift]);
 770                                 weighted_time = atof (fields[13 + fieldshift]);
 771                         }
 772                 }
 773                 else
 774                 {
 775                         DEBUG ("numfields = %i; => unknown file format.", numfields);
 776                         continue;
 777                 }
 778
 779                 {
 780                         derive_t diff_read_sectors;
 781                         derive_t diff_write_sectors;
 782
 783                 /* If the counter wraps around, it's only 32 bits.. */
 784                         if (read_sectors < ds->read_sectors)
 785                                 diff_read_sectors = 1 + read_sectors
 786                                         + (UINT_MAX - ds->read_sectors);
 787                         else
 788                                 diff_read_sectors = read_sectors - ds->read_sectors;
 789                         if (write_sectors < ds->write_sectors)
 790                                 diff_write_sectors = 1 + write_sectors
 791                                         + (UINT_MAX - ds->write_sectors);
 792                         else
 793                                 diff_write_sectors = write_sectors - ds->write_sectors;
 794
 795                         ds->read_bytes += 512 * diff_read_sectors;
 796                         ds->write_bytes += 512 * diff_write_sectors;
 797                         ds->read_sectors = read_sectors;
 798                         ds->write_sectors = write_sectors;
 799                 }
 800
 801                 /* Calculate the average time an io-op needs to complete */
 802                 if (is_disk)
 803                 {
 804                         derive_t diff_read_ops;
 805                         derive_t diff_write_ops;
 806                         derive_t diff_read_time;
 807                         derive_t diff_write_time;
 808
 809                         if (read_ops < ds->read_ops)
 810                                 diff_read_ops = 1 + read_ops
 811                                         + (UINT_MAX - ds->read_ops);
 812                         else
 813                                 diff_read_ops = read_ops - ds->read_ops;
 814                         DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
 815                                         "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
 816                                         disk_name,
 817                                         read_ops, ds->read_ops, diff_read_ops);
 818
 819                         if (write_ops < ds->write_ops)
 820                                 diff_write_ops = 1 + write_ops
 821                                         + (UINT_MAX - ds->write_ops);
 822                         else
 823                                 diff_write_ops = write_ops - ds->write_ops;
 824
 825                         if (read_time < ds->read_time)
 826                                 diff_read_time = 1 + read_time
 827                                         + (UINT_MAX - ds->read_time);
 828                         else
 829                                 diff_read_time = read_time - ds->read_time;
 830
 831                         if (write_time < ds->write_time)
 832                                 diff_write_time = 1 + write_time
 833                                         + (UINT_MAX - ds->write_time);
 834                         else
 835                                 diff_write_time = write_time - ds->write_time;
 836
 837                         if (diff_read_ops != 0)
 838                                 ds->avg_read_time += disk_calc_time_incr (
 839                                                 diff_read_time, diff_read_ops);
 840                         if (diff_write_ops != 0)
 841                                 ds->avg_write_time += disk_calc_time_incr (
 842                                                 diff_write_time, diff_write_ops);
 843
 844                         ds->read_ops = read_ops;
 845                         ds->read_time = read_time;
 846                         ds->write_ops = write_ops;
 847                         ds->write_time = write_time;
 848
 849                         if (read_merged || write_merged)
 850                                 ds->has_merged = 1;
 851
 852                         if (in_progress)
 853                                 ds->has_in_progress = 1;
 854
 855                         if (io_time)
 856                                 ds->has_io_time = 1;
 857
 858                 } /* if (is_disk) */
 859
 860                 /* Don't write to the RRDs if we've just started.. */
 861                 ds->poll_count++;
 862                 if (ds->poll_count <= 2)
 863                 {
 864                         DEBUG ("disk plugin: (ds->poll_count = %i) <= "
 865                                         "(min_poll_count = 2); => Not writing.",
 866                                         ds->poll_count);
 867                         continue;
 868                 }
 869
 870                 if ((read_ops == 0) && (write_ops == 0))
 871                 {
 872                         DEBUG ("disk plugin: ((read_ops == 0) && "
 873                                         "(write_ops == 0)); => Not writing.");
 874                         continue;
 875                 }
 876
 877                 output_name = disk_name;
 878
 879 #if HAVE_LIBUDEV
 880                 char *alt_name = NULL;
 881                 if (conf_udev_name_attr != NULL)
 882                 {
 883                         alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
 884                         if (alt_name != NULL)
 885                                 output_name = alt_name;
 886                 }
 887 #endif
 888
 889                 if (ignorelist_match (ignorelist, output_name) != 0)
 890                 {
 891 #if HAVE_LIBUDEV
 892                         /* release udev-based alternate name, if allocated */
 893                         sfree (alt_name);
 894 #endif
 895                         continue;
 896                 }
 897
 898                 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
 899                         disk_submit (output_name, "disk_octets",
 900                                         ds->read_bytes, ds->write_bytes);
 901
 902                 if ((ds->read_ops != 0) || (ds->write_ops != 0))
 903                         disk_submit (output_name, "disk_ops",
 904                                         read_ops, write_ops);
 905
 906                 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
 907                         disk_submit (output_name, "disk_time",
 908                                         ds->avg_read_time, ds->avg_write_time);
 909
 910                 if (is_disk)
 911                 {
 912                         if (ds->has_merged)
 913                                 disk_submit (output_name, "disk_merged",
 914                                         read_merged, write_merged);
 915                         if (ds->has_in_progress)
 916                                 submit_in_progress (output_name, in_progress);
 917                         if (ds->has_io_time)
 918                                 submit_io_time (output_name, io_time, weighted_time);
 919                 } /* if (is_disk) */
 920
 921 #if HAVE_LIBUDEV
 922                 /* release udev-based alternate name, if allocated */
 923                 sfree (alt_name);
 924 #endif
 925         } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
 926
 927
 928         fclose (fh);
 929 /* #endif defined(KERNEL_LINUX) */
 930
 931 #elif HAVE_LIBKSTAT
 932 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
 933 #  define KIO_ROCTETS reads
 934 #  define KIO_WOCTETS writes
 935 #  define KIO_ROPS    nreads
 936 #  define KIO_WOPS    nwrites
 937 #  define KIO_RTIME   rtime
 938 #  define KIO_WTIME   wtime
 939 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
 940 #  define KIO_ROCTETS nread
 941 #  define KIO_WOCTETS nwritten
 942 #  define KIO_ROPS    reads
 943 #  define KIO_WOPS    writes
 944 #  define KIO_RTIME   rtime
 945 #  define KIO_WTIME   wtime
 946 # else
 947 #  error "kstat_io_t does not have the required members"
 948 # endif
 949         static kstat_io_t kio;
 950
 951         if (kc == NULL)
 952                 return (-1);
 953
 954         for (int i = 0; i < numdisk; i++)
 955         {
 956                 if (kstat_read (kc, ksp[i], &kio) == -1)
 957                         continue;
 958
 959                 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
 960                 {
 961                         if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
 962                                 continue;
 963
 964                         disk_submit (ksp[i]->ks_name, "disk_octets",
 965                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 966                         disk_submit (ksp[i]->ks_name, "disk_ops",
 967                                         kio.KIO_ROPS, kio.KIO_WOPS);
 968                         /* FIXME: Convert this to microseconds if necessary */
 969                         disk_submit (ksp[i]->ks_name, "disk_time",
 970                                         kio.KIO_RTIME, kio.KIO_WTIME);
 971                 }
 972                 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
 973                 {
 974                         if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
 975                                 continue;
 976
 977                         disk_submit (ksp[i]->ks_name, "disk_octets",
 978                                         kio.KIO_ROCTETS, kio.KIO_WOCTETS);
 979                         disk_submit (ksp[i]->ks_name, "disk_ops",
 980                                         kio.KIO_ROPS, kio.KIO_WOPS);
 981                 }
 982         }
 983 /* #endif defined(HAVE_LIBKSTAT) */
 984
 985 #elif defined(HAVE_LIBSTATGRAB)
 986         sg_disk_io_stats *ds;
 987 # if HAVE_LIBSTATGRAB_0_90
 988         size_t disks;
 989 # else
 990         int disks;
 991 #endif
 992         char name[DATA_MAX_NAME_LEN];
 993
 994         if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
 995                 return (0);
 996
 997         for (int counter = 0; counter < disks; counter++) {
 998                 strncpy(name, ds->disk_name, sizeof(name));
 999                 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
1000
1001                 if (ignorelist_match (ignorelist, name) != 0) {
1002                         ds++;
1003                         continue;
1004                 }
1005
1006                 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
1007                 ds++;
1008         }
1009 /* #endif defined(HAVE_LIBSTATGRAB) */
1010
1011 #elif defined(HAVE_PERFSTAT)
1012         derive_t read_sectors;
1013         derive_t write_sectors;
1014         derive_t read_time;
1015         derive_t write_time;
1016         derive_t read_ops;
1017         derive_t write_ops;
1018         perfstat_id_t firstpath;
1019         int rnumdisk;
1020
1021         if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
1022         {
1023                 char errbuf[1024];
1024                 WARNING ("disk plugin: perfstat_disk: %s",
1025                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1026                 return (-1);
1027         }
1028
1029         if (numdisk != pnumdisk || stat_disk==NULL) {
1030                 if (stat_disk!=NULL)
1031                         free(stat_disk);
1032                 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
1033         }
1034         pnumdisk = numdisk;
1035
1036         firstpath.name[0]='\0';
1037         if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
1038         {
1039                 char errbuf[1024];
1040                 WARNING ("disk plugin: perfstat_disk : %s",
1041                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1042                 return (-1);
1043         }
1044
1045         for (int i = 0; i < rnumdisk; i++)
1046         {
1047                 if (ignorelist_match (ignorelist, stat_disk[i].name) != 0)
1048                         continue;
1049
1050                 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
1051                 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
1052                 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1053
1054                 read_ops = stat_disk[i].xrate;
1055                 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1056                 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
1057
1058                 read_time = stat_disk[i].rserv;
1059                 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1060                 write_time = stat_disk[i].wserv;
1061                 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1062                 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1063         }
1064 #endif /* defined(HAVE_PERFSTAT) */
1065
1066         return (0);
1067 } /* int disk_read */
1068
1069 void module_register (void)
1070 {
1071   plugin_register_config ("disk", disk_config,
1072       config_keys, config_keys_num);
1073   plugin_register_init ("disk", disk_init);
1074   plugin_register_shutdown ("disk", disk_shutdown);
1075   plugin_register_read ("disk", disk_read);
1076 } /* void module_register */