2 * collectd - src/disk.c
3 * Copyright (C) 2005-2012 Florian octo Forster
4 * Copyright (C) 2009 Manuel Sanmartin
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.
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.
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
20 * Florian octo Forster <octo at collectd.org>
27 #include "utils_ignorelist.h"
29 #if HAVE_MACH_MACH_TYPES_H
30 # include <mach/mach_types.h>
32 #if HAVE_MACH_MACH_INIT_H
33 # include <mach/mach_init.h>
35 #if HAVE_MACH_MACH_ERROR_H
36 # include <mach/mach_error.h>
38 #if HAVE_MACH_MACH_PORT_H
39 # include <mach/mach_port.h>
41 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
42 # include <CoreFoundation/CoreFoundation.h>
44 #if HAVE_IOKIT_IOKITLIB_H
45 # include <IOKit/IOKitLib.h>
47 #if HAVE_IOKIT_IOTYPES_H
48 # include <IOKit/IOTypes.h>
50 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
51 # include <IOKit/storage/IOBlockStorageDriver.h>
53 #if HAVE_IOKIT_IOBSD_H
54 # include <IOKit/IOBSD.h>
65 # define UINT_MAX 4294967295U
69 # include <statgrab.h>
73 # ifndef _AIXVERSION_610
74 # include <sys/systemcfg.h>
76 # include <sys/protosw.h>
77 # include <libperfstat.h>
80 #if HAVE_IOKIT_IOKITLIB_H
81 static mach_port_t io_master_port = MACH_PORT_NULL;
82 /* This defaults to false for backwards compatibility. Please fix in the next
84 static _Bool use_bsd_name = 0;
85 /* #endif HAVE_IOKIT_IOKITLIB_H */
88 typedef struct diskstats
92 /* This overflows in roughly 1361 years */
93 unsigned int poll_count;
95 derive_t read_sectors;
96 derive_t write_sectors;
106 derive_t avg_read_time;
107 derive_t avg_write_time;
110 _Bool has_in_progress;
113 struct diskstats *next;
116 static diskstats_t *disklist;
117 /* #endif KERNEL_LINUX */
119 static struct gmesh geom_tree;
120 /* #endif KERNEL_FREEBSD */
123 #define MAX_NUMDISK 1024
124 extern kstat_ctl_t *kc;
125 static kstat_t *ksp[MAX_NUMDISK];
126 static int numdisk = 0;
127 /* #endif HAVE_LIBKSTAT */
129 #elif defined(HAVE_LIBSTATGRAB)
130 /* #endif HAVE_LIBKSTATGRAB */
133 static perfstat_disk_t * stat_disk;
136 /* #endif HAVE_PERFSTAT */
139 # error "No applicable input method."
145 static char *conf_udev_name_attr = NULL;
146 static struct udev *handle_udev;
149 static const char *config_keys[] =
156 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
158 static ignorelist_t *ignorelist = NULL;
160 static int disk_config (const char *key, const char *value)
162 if (ignorelist == NULL)
163 ignorelist = ignorelist_create (/* invert = */ 1);
164 if (ignorelist == NULL)
167 if (strcasecmp ("Disk", key) == 0)
169 ignorelist_add (ignorelist, value);
171 else if (strcasecmp ("IgnoreSelected", key) == 0)
176 ignorelist_set_invert (ignorelist, invert);
178 else if (strcasecmp ("UseBSDName", key) == 0)
180 #if HAVE_IOKIT_IOKITLIB_H
181 use_bsd_name = IS_TRUE (value) ? 1 : 0;
183 WARNING ("disk plugin: The \"UseBSDName\" option is only supported "
184 "on Mach / Mac OS X and will be ignored.");
187 else if (strcasecmp ("UdevNameAttr", key) == 0)
190 if (conf_udev_name_attr != NULL)
192 free (conf_udev_name_attr);
193 conf_udev_name_attr = NULL;
195 if ((conf_udev_name_attr = strdup (value)) == NULL)
198 WARNING ("disk plugin: The \"UdevNameAttr\" option is only supported "
199 "if collectd is built with libudev support");
208 } /* int disk_config */
210 static int disk_init (void)
212 #if HAVE_IOKIT_IOKITLIB_H
213 kern_return_t status;
215 if (io_master_port != MACH_PORT_NULL)
217 mach_port_deallocate (mach_task_self (),
219 io_master_port = MACH_PORT_NULL;
222 status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
223 if (status != kIOReturnSuccess)
225 ERROR ("IOMasterPort failed: %s",
226 mach_error_string (status));
227 io_master_port = MACH_PORT_NULL;
230 /* #endif HAVE_IOKIT_IOKITLIB_H */
234 /* #endif KERNEL_LINUX */
239 rv = geom_gettree(&geom_tree);
241 ERROR ("geom_gettree() failed, returned %d", rv);
244 rv = geom_stats_open();
246 ERROR ("geom_stats_open() failed, returned %d", rv);
249 /* #endif KERNEL_FREEBSD */
259 for (numdisk = 0, ksp_chain = kc->kc_chain;
260 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
261 ksp_chain = ksp_chain->ks_next)
263 if (strncmp (ksp_chain->ks_class, "disk", 4)
264 && strncmp (ksp_chain->ks_class, "partition", 9))
266 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
268 ksp[numdisk++] = ksp_chain;
270 #endif /* HAVE_LIBKSTAT */
273 } /* int disk_init */
275 static void disk_submit (const char *plugin_instance,
277 derive_t read, derive_t write)
280 value_list_t vl = VALUE_LIST_INIT;
282 /* Both `ignorelist' and `plugin_instance' may be NULL. */
283 if (ignorelist_match (ignorelist, plugin_instance) != 0)
286 values[0].derive = read;
287 values[1].derive = write;
291 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
292 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
293 sstrncpy (vl.plugin_instance, plugin_instance,
294 sizeof (vl.plugin_instance));
295 sstrncpy (vl.type, type, sizeof (vl.type));
297 plugin_dispatch_values (&vl);
298 } /* void disk_submit */
300 #if KERNEL_FREEBSD || KERNEL_LINUX
301 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
304 value_list_t vl = VALUE_LIST_INIT;
306 if (ignorelist_match (ignorelist, plugin_instance) != 0)
309 values[0].derive = io_time;
310 values[1].derive = weighted_time;
314 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
315 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
316 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
317 sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
319 plugin_dispatch_values (&vl);
320 } /* void submit_io_time */
321 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
324 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
327 value_list_t vl = VALUE_LIST_INIT;
329 if (ignorelist_match (ignorelist, disk_name) != 0)
332 v.gauge = in_progress;
336 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
337 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
338 sstrncpy (vl.plugin_instance, disk_name, sizeof (vl.plugin_instance));
339 sstrncpy (vl.type, "pending_operations", sizeof (vl.type));
341 plugin_dispatch_values (&vl);
345 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
347 double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
348 double avg_time = ((double) delta_time) / ((double) delta_ops);
349 double avg_time_incr = interval * avg_time;
351 return ((counter_t) (avg_time_incr + .5));
357 * Attempt to provide an rename disk instance from an assigned udev attribute.
359 * On success, it returns a strduped char* to the desired attribute value.
360 * Otherwise it returns NULL.
363 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
365 struct udev_device *dev;
369 dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
372 prop = udev_device_get_property_value (dev, attr);
374 output = strdup (prop);
375 DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
377 udev_device_unref (dev);
383 #if HAVE_IOKIT_IOKITLIB_H
384 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
386 signed long long val_int;
390 /* `key_obj' needs to be released. */
391 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
392 kCFStringEncodingASCII);
395 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
399 /* get => we don't need to release (== free) the object */
400 val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
406 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
410 if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
412 DEBUG ("CFNumberGetValue (%s) failed.", key);
418 #endif /* HAVE_IOKIT_IOKITLIB_H */
420 static int disk_read (void)
422 #if HAVE_IOKIT_IOKITLIB_H
423 io_registry_entry_t disk;
424 io_registry_entry_t disk_child;
425 io_iterator_t disk_list;
426 CFMutableDictionaryRef props_dict, child_dict;
427 CFDictionaryRef stats_dict;
428 CFStringRef tmp_cf_string_ref;
429 kern_return_t status;
431 signed long long read_ops, read_byt, read_tme;
432 signed long long write_ops, write_byt, write_tme;
434 int disk_major, disk_minor;
435 char disk_name[DATA_MAX_NAME_LEN];
436 char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
438 /* Get the list of all disk objects. */
439 if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
440 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
444 while ((disk = IOIteratorNext (disk_list)) != 0) {
449 /* get child of disk entry and corresponding property dictionary */
450 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
451 /* This fails for example for DVD/CD drives, which we want to ignore anyway */
452 DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
453 IOObjectRelease (disk);
456 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
457 ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
458 IOObjectRelease (disk_child);
459 IOObjectRelease (disk);
463 /* extract name and major/minor numbers */
464 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
465 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
466 if (tmp_cf_string_ref) {
467 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
468 CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
470 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
471 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
472 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
473 CFRelease (child_dict);
474 IOObjectRelease (disk_child);
476 /* get property dictionary of the disk entry itself */
477 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
478 ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
479 IOObjectRelease (disk);
483 /* extract name and stats dictionary */
484 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
485 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
486 if (tmp_cf_string_ref) {
487 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
488 CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
490 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
491 if (stats_dict == NULL) {
492 ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
493 CFRelease (props_dict);
494 IOObjectRelease (disk);
497 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
501 if (child_disk_name_bsd[0] != 0)
502 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
503 else if (props_disk_name_bsd[0] != 0)
504 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
506 ERROR ("disk plugin: can't find bsd disk name.");
507 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
511 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
513 /* extract the stats */
514 read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
515 read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
516 read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
517 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
518 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
519 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
520 CFRelease (props_dict);
521 IOObjectRelease (disk);
524 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
525 if ((read_byt != -1LL) || (write_byt != -1LL))
526 disk_submit (disk_name, "disk_octets", read_byt, write_byt);
527 if ((read_ops != -1LL) || (write_ops != -1LL))
528 disk_submit (disk_name, "disk_ops", read_ops, write_ops);
529 if ((read_tme != -1LL) || (write_tme != -1LL))
530 disk_submit (disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
533 IOObjectRelease (disk_list);
534 /* #endif HAVE_IOKIT_IOKITLIB_H */
540 struct devstat *snap_iter;
542 struct gident *geom_id;
544 const char *disk_name;
545 long double read_time, write_time, busy_time, total_duration;
547 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
549 geom_stats_snapshot_free(snap);
551 /* Get a fresh copy of stats snapshot */
552 snap = geom_stats_snapshot_get();
554 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
558 /* Check if we have dirty read from this snapshot */
560 geom_stats_snapshot_reset(snap);
561 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
562 if (snap_iter->id == NULL)
564 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
566 /* New device? refresh GEOM tree */
567 if (geom_id == NULL) {
568 geom_deletetree(&geom_tree);
569 if (geom_gettree(&geom_tree) != 0) {
570 ERROR("disk plugin: geom_gettree() failed");
571 geom_stats_snapshot_free(snap);
574 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
577 * This should be rare: the device come right before we take the
578 * snapshot and went away right after it. We will handle this
579 * case later, so don't mark dirty but silently ignore it.
584 /* Only collect PROVIDER data */
585 if (geom_id->lg_what != ISPROVIDER)
588 /* Only collect data when rank is 1 (physical devices) */
589 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
592 /* Check if this is a dirty read quit for another try */
593 if (snap_iter->sequence0 != snap_iter->sequence1) {
601 geom_stats_snapshot_reset(snap);
603 snap_iter = geom_stats_snapshot_next(snap);
604 if (snap_iter == NULL)
607 if (snap_iter->id == NULL)
609 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
612 if (geom_id->lg_what != ISPROVIDER)
614 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
616 /* Skip dirty reads, if present */
617 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
620 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
622 if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
623 disk_submit(disk_name, "disk_octets",
624 (derive_t)snap_iter->bytes[DEVSTAT_READ],
625 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
628 if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
629 disk_submit(disk_name, "disk_ops",
630 (derive_t)snap_iter->operations[DEVSTAT_READ],
631 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
634 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
635 write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
636 if ((read_time != 0) || (write_time != 0)) {
637 disk_submit (disk_name, "disk_time",
638 (derive_t)(read_time*1000), (derive_t)(write_time*1000));
640 if (devstat_compute_statistics(snap_iter, NULL, 1.0,
641 DSM_TOTAL_BUSY_TIME, &busy_time,
642 DSM_TOTAL_DURATION, &total_duration,
644 WARNING("%s", devstat_errbuf);
648 submit_io_time(disk_name, busy_time, total_duration);
651 geom_stats_snapshot_free(snap);
663 derive_t read_sectors = 0;
664 derive_t write_sectors = 0;
666 derive_t read_ops = 0;
667 derive_t read_merged = 0;
668 derive_t read_time = 0;
669 derive_t write_ops = 0;
670 derive_t write_merged = 0;
671 derive_t write_time = 0;
672 gauge_t in_progress = NAN;
673 derive_t io_time = 0;
674 derive_t weighted_time = 0;
677 diskstats_t *ds, *pre_ds;
679 if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
681 fh = fopen ("/proc/partitions", "r");
684 ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
688 /* Kernel is 2.4.* */
693 handle_udev = udev_new();
696 while (fgets (buffer, sizeof (buffer), fh) != NULL)
701 numfields = strsplit (buffer, fields, 32);
703 if ((numfields != (14 + fieldshift)) && (numfields != 7))
706 minor = atoll (fields[1]);
708 disk_name = fields[2 + fieldshift];
710 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
711 if (strcmp (disk_name, ds->name) == 0)
716 if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
719 if ((ds->name = strdup (disk_name)) == NULL)
734 /* Kernel 2.6, Partition */
735 read_ops = atoll (fields[3]);
736 read_sectors = atoll (fields[4]);
737 write_ops = atoll (fields[5]);
738 write_sectors = atoll (fields[6]);
740 else if (numfields == (14 + fieldshift))
742 read_ops = atoll (fields[3 + fieldshift]);
743 write_ops = atoll (fields[7 + fieldshift]);
745 read_sectors = atoll (fields[5 + fieldshift]);
746 write_sectors = atoll (fields[9 + fieldshift]);
748 if ((fieldshift == 0) || (minor == 0))
751 read_merged = atoll (fields[4 + fieldshift]);
752 read_time = atoll (fields[6 + fieldshift]);
753 write_merged = atoll (fields[8 + fieldshift]);
754 write_time = atoll (fields[10+ fieldshift]);
756 in_progress = atof (fields[11 + fieldshift]);
758 io_time = atof (fields[12 + fieldshift]);
759 weighted_time = atof (fields[13 + fieldshift]);
764 DEBUG ("numfields = %i; => unknown file format.", numfields);
769 derive_t diff_read_sectors;
770 derive_t diff_write_sectors;
772 /* If the counter wraps around, it's only 32 bits.. */
773 if (read_sectors < ds->read_sectors)
774 diff_read_sectors = 1 + read_sectors
775 + (UINT_MAX - ds->read_sectors);
777 diff_read_sectors = read_sectors - ds->read_sectors;
778 if (write_sectors < ds->write_sectors)
779 diff_write_sectors = 1 + write_sectors
780 + (UINT_MAX - ds->write_sectors);
782 diff_write_sectors = write_sectors - ds->write_sectors;
784 ds->read_bytes += 512 * diff_read_sectors;
785 ds->write_bytes += 512 * diff_write_sectors;
786 ds->read_sectors = read_sectors;
787 ds->write_sectors = write_sectors;
790 /* Calculate the average time an io-op needs to complete */
793 derive_t diff_read_ops;
794 derive_t diff_write_ops;
795 derive_t diff_read_time;
796 derive_t diff_write_time;
798 if (read_ops < ds->read_ops)
799 diff_read_ops = 1 + read_ops
800 + (UINT_MAX - ds->read_ops);
802 diff_read_ops = read_ops - ds->read_ops;
803 DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
804 "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
806 read_ops, ds->read_ops, diff_read_ops);
808 if (write_ops < ds->write_ops)
809 diff_write_ops = 1 + write_ops
810 + (UINT_MAX - ds->write_ops);
812 diff_write_ops = write_ops - ds->write_ops;
814 if (read_time < ds->read_time)
815 diff_read_time = 1 + read_time
816 + (UINT_MAX - ds->read_time);
818 diff_read_time = read_time - ds->read_time;
820 if (write_time < ds->write_time)
821 diff_write_time = 1 + write_time
822 + (UINT_MAX - ds->write_time);
824 diff_write_time = write_time - ds->write_time;
826 if (diff_read_ops != 0)
827 ds->avg_read_time += disk_calc_time_incr (
828 diff_read_time, diff_read_ops);
829 if (diff_write_ops != 0)
830 ds->avg_write_time += disk_calc_time_incr (
831 diff_write_time, diff_write_ops);
833 ds->read_ops = read_ops;
834 ds->read_time = read_time;
835 ds->write_ops = write_ops;
836 ds->write_time = write_time;
838 if (read_merged || write_merged)
842 ds->has_in_progress = 1;
849 /* Don't write to the RRDs if we've just started.. */
851 if (ds->poll_count <= 2)
853 DEBUG ("disk plugin: (ds->poll_count = %i) <= "
854 "(min_poll_count = 2); => Not writing.",
859 if ((read_ops == 0) && (write_ops == 0))
861 DEBUG ("disk plugin: ((read_ops == 0) && "
862 "(write_ops == 0)); => Not writing.");
866 output_name = disk_name;
869 char *alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
870 if (alt_name != NULL)
871 output_name = alt_name;
874 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
875 disk_submit (output_name, "disk_octets",
876 ds->read_bytes, ds->write_bytes);
878 if ((ds->read_ops != 0) || (ds->write_ops != 0))
879 disk_submit (output_name, "disk_ops",
880 read_ops, write_ops);
882 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
883 disk_submit (output_name, "disk_time",
884 ds->avg_read_time, ds->avg_write_time);
889 disk_submit (output_name, "disk_merged",
890 read_merged, write_merged);
891 if (ds->has_in_progress)
892 submit_in_progress (output_name, in_progress);
894 submit_io_time (output_name, io_time, weighted_time);
898 /* release udev-based alternate name, if allocated */
901 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
904 udev_unref(handle_udev);
908 /* #endif defined(KERNEL_LINUX) */
911 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
912 # define KIO_ROCTETS reads
913 # define KIO_WOCTETS writes
914 # define KIO_ROPS nreads
915 # define KIO_WOPS nwrites
916 # define KIO_RTIME rtime
917 # define KIO_WTIME wtime
918 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
919 # define KIO_ROCTETS nread
920 # define KIO_WOCTETS nwritten
921 # define KIO_ROPS reads
922 # define KIO_WOPS writes
923 # define KIO_RTIME rtime
924 # define KIO_WTIME wtime
926 # error "kstat_io_t does not have the required members"
928 static kstat_io_t kio;
934 for (i = 0; i < numdisk; i++)
936 if (kstat_read (kc, ksp[i], &kio) == -1)
939 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
941 disk_submit (ksp[i]->ks_name, "disk_octets",
942 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
943 disk_submit (ksp[i]->ks_name, "disk_ops",
944 kio.KIO_ROPS, kio.KIO_WOPS);
945 /* FIXME: Convert this to microseconds if necessary */
946 disk_submit (ksp[i]->ks_name, "disk_time",
947 kio.KIO_RTIME, kio.KIO_WTIME);
949 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
951 disk_submit (ksp[i]->ks_name, "disk_octets",
952 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
953 disk_submit (ksp[i]->ks_name, "disk_ops",
954 kio.KIO_ROPS, kio.KIO_WOPS);
957 /* #endif defined(HAVE_LIBKSTAT) */
959 #elif defined(HAVE_LIBSTATGRAB)
960 sg_disk_io_stats *ds;
961 # if HAVE_LIBSTATGRAB_0_90
967 char name[DATA_MAX_NAME_LEN];
969 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
972 for (counter=0; counter < disks; counter++) {
973 strncpy(name, ds->disk_name, sizeof(name));
974 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
975 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
978 /* #endif defined(HAVE_LIBSTATGRAB) */
980 #elif defined(HAVE_PERFSTAT)
981 derive_t read_sectors;
982 derive_t write_sectors;
987 perfstat_id_t firstpath;
991 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
994 WARNING ("disk plugin: perfstat_disk: %s",
995 sstrerror (errno, errbuf, sizeof (errbuf)));
999 if (numdisk != pnumdisk || stat_disk==NULL) {
1000 if (stat_disk!=NULL)
1002 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
1006 firstpath.name[0]='\0';
1007 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
1010 WARNING ("disk plugin: perfstat_disk : %s",
1011 sstrerror (errno, errbuf, sizeof (errbuf)));
1015 for (i = 0; i < rnumdisk; i++)
1017 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
1018 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
1019 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1021 read_ops = stat_disk[i].xrate;
1022 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1023 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
1025 read_time = stat_disk[i].rserv;
1026 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1027 write_time = stat_disk[i].wserv;
1028 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1029 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1031 #endif /* defined(HAVE_PERFSTAT) */
1034 } /* int disk_read */
1036 void module_register (void)
1038 plugin_register_config ("disk", disk_config,
1039 config_keys, config_keys_num);
1040 plugin_register_init ("disk", disk_init);
1041 plugin_register_read ("disk", disk_read);
1042 } /* void module_register */