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;
109 struct diskstats *next;
112 static diskstats_t *disklist;
113 /* #endif KERNEL_LINUX */
115 static void *snap_previous;
116 static struct timespec tsnap_previous;
117 static struct gmesh geom_tree;
118 /* #endif KERNEL_FREEBSD */
121 #define MAX_NUMDISK 1024
122 extern kstat_ctl_t *kc;
123 static kstat_t *ksp[MAX_NUMDISK];
124 static int numdisk = 0;
125 /* #endif HAVE_LIBKSTAT */
127 #elif defined(HAVE_LIBSTATGRAB)
128 /* #endif HAVE_LIBKSTATGRAB */
131 static perfstat_disk_t * stat_disk;
134 /* #endif HAVE_PERFSTAT */
137 # error "No applicable input method."
143 static char *conf_udev_name_attr = NULL;
144 static struct udev *handle_udev;
147 static const char *config_keys[] =
154 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
156 static ignorelist_t *ignorelist = NULL;
158 static int disk_config (const char *key, const char *value)
160 if (ignorelist == NULL)
161 ignorelist = ignorelist_create (/* invert = */ 1);
162 if (ignorelist == NULL)
165 if (strcasecmp ("Disk", key) == 0)
167 ignorelist_add (ignorelist, value);
169 else if (strcasecmp ("IgnoreSelected", key) == 0)
174 ignorelist_set_invert (ignorelist, invert);
176 else if (strcasecmp ("UseBSDName", key) == 0)
178 #if HAVE_IOKIT_IOKITLIB_H
179 use_bsd_name = IS_TRUE (value) ? 1 : 0;
181 WARNING ("disk plugin: The \"UseBSDName\" option is only supported "
182 "on Mach / Mac OS X and will be ignored.");
185 else if (strcasecmp ("UdevNameAttr", key) == 0)
188 if (conf_udev_name_attr != NULL)
190 free (conf_udev_name_attr);
191 conf_udev_name_attr = NULL;
193 if ((conf_udev_name_attr = strdup (value)) == NULL)
196 WARNING ("disk plugin: The \"UdevNameAttr\" option is only supported "
197 "if collectd is built with libudev support");
206 } /* int disk_config */
208 static int disk_init (void)
210 #if HAVE_IOKIT_IOKITLIB_H
211 kern_return_t status;
213 if (io_master_port != MACH_PORT_NULL)
215 mach_port_deallocate (mach_task_self (),
217 io_master_port = MACH_PORT_NULL;
220 status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
221 if (status != kIOReturnSuccess)
223 ERROR ("IOMasterPort failed: %s",
224 mach_error_string (status));
225 io_master_port = MACH_PORT_NULL;
228 /* #endif HAVE_IOKIT_IOKITLIB_H */
232 /* #endif KERNEL_LINUX */
237 rv = geom_gettree(&geom_tree);
239 ERROR ("geom_gettree() failed, returned %d", rv);
242 rv = geom_stats_open();
244 ERROR ("geom_stats_open() failed, returned %d", rv);
247 snap_previous = geom_stats_snapshot_get();
248 if (snap_previous == NULL) {
249 ERROR ("geom_stats_snapshot_get() failed");
252 geom_stats_snapshot_timestamp(snap_previous, &tsnap_previous);
253 /* #endif KERNEL_FREEBSD */
263 for (numdisk = 0, ksp_chain = kc->kc_chain;
264 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
265 ksp_chain = ksp_chain->ks_next)
267 if (strncmp (ksp_chain->ks_class, "disk", 4)
268 && strncmp (ksp_chain->ks_class, "partition", 9))
270 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
272 ksp[numdisk++] = ksp_chain;
274 #endif /* HAVE_LIBKSTAT */
277 } /* int disk_init */
279 static void disk_submit (const char *plugin_instance,
281 derive_t read, derive_t write)
284 value_list_t vl = VALUE_LIST_INIT;
286 /* Both `ignorelist' and `plugin_instance' may be NULL. */
287 if (ignorelist_match (ignorelist, plugin_instance) != 0)
290 values[0].derive = read;
291 values[1].derive = write;
295 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
296 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
297 sstrncpy (vl.plugin_instance, plugin_instance,
298 sizeof (vl.plugin_instance));
299 sstrncpy (vl.type, type, sizeof (vl.type));
301 plugin_dispatch_values (&vl);
302 } /* void disk_submit */
305 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
308 value_list_t vl = VALUE_LIST_INIT;
310 if (ignorelist_match (ignorelist, disk_name) != 0)
313 v.gauge = in_progress;
317 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
318 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
319 sstrncpy (vl.plugin_instance, disk_name, sizeof (vl.plugin_instance));
320 sstrncpy (vl.type, "pending_operations", sizeof (vl.type));
322 plugin_dispatch_values (&vl);
325 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
328 value_list_t vl = VALUE_LIST_INIT;
330 if (ignorelist_match (ignorelist, plugin_instance) != 0)
333 values[0].derive = io_time;
334 values[1].derive = weighted_time;
338 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
339 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
340 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
341 sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
343 plugin_dispatch_values (&vl);
347 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
349 double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
350 double avg_time = ((double) delta_time) / ((double) delta_ops);
351 double avg_time_incr = interval * avg_time;
353 return ((counter_t) (avg_time_incr + .5));
359 * Attempt to provide an rename disk instance from an assigned udev attribute.
361 * On success, it returns a strduped char* to the desired attribute value.
362 * Otherwise it returns NULL.
365 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
367 struct udev_device *dev;
371 dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
374 prop = udev_device_get_property_value (dev, attr);
376 output = strdup (prop);
377 DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
379 udev_device_unref (dev);
385 #if HAVE_IOKIT_IOKITLIB_H
386 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
388 signed long long val_int;
392 /* `key_obj' needs to be released. */
393 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
394 kCFStringEncodingASCII);
397 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
401 /* get => we don't need to release (== free) the object */
402 val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
408 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
412 if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
414 DEBUG ("CFNumberGetValue (%s) failed.", key);
420 #endif /* HAVE_IOKIT_IOKITLIB_H */
422 static int disk_read (void)
424 #if HAVE_IOKIT_IOKITLIB_H
425 io_registry_entry_t disk;
426 io_registry_entry_t disk_child;
427 io_iterator_t disk_list;
428 CFMutableDictionaryRef props_dict, child_dict;
429 CFDictionaryRef stats_dict;
430 CFStringRef tmp_cf_string_ref;
431 kern_return_t status;
433 signed long long read_ops, read_byt, read_tme;
434 signed long long write_ops, write_byt, write_tme;
436 int disk_major, disk_minor;
437 char disk_name[DATA_MAX_NAME_LEN];
438 char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
440 /* Get the list of all disk objects. */
441 if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
442 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
446 while ((disk = IOIteratorNext (disk_list)) != 0) {
451 /* get child of disk entry and corresponding property dictionary */
452 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
453 /* This fails for example for DVD/CD drives, which we want to ignore anyway */
454 DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
455 IOObjectRelease (disk);
458 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
459 ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
460 IOObjectRelease (disk_child);
461 IOObjectRelease (disk);
465 /* extract name and major/minor numbers */
466 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
467 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
468 if (tmp_cf_string_ref) {
469 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
470 CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
472 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
473 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
474 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
475 CFRelease (child_dict);
476 IOObjectRelease (disk_child);
478 /* get property dictionary of the disk entry itself */
479 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
480 ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
481 IOObjectRelease (disk);
485 /* extract name and stats dictionary */
486 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
487 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
488 if (tmp_cf_string_ref) {
489 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
490 CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
492 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
493 if (stats_dict == NULL) {
494 ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
495 CFRelease (props_dict);
496 IOObjectRelease (disk);
499 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
503 if (child_disk_name_bsd[0] != 0)
504 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
505 else if (props_disk_name_bsd[0] != 0)
506 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
508 ERROR ("disk plugin: can't find bsd disk name.");
509 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
513 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
515 /* extract the stats */
516 read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
517 read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
518 read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
519 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
520 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
521 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
522 CFRelease (props_dict);
523 IOObjectRelease (disk);
526 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
527 if ((read_byt != -1LL) || (write_byt != -1LL))
528 disk_submit (disk_name, "disk_octets", read_byt, write_byt);
529 if ((read_ops != -1LL) || (write_ops != -1LL))
530 disk_submit (disk_name, "disk_ops", read_ops, write_ops);
531 if ((read_tme != -1LL) || (write_tme != -1LL))
532 disk_submit (disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
535 IOObjectRelease (disk_list);
536 /* #endif HAVE_IOKIT_IOKITLIB_H */
541 void *snap_present = NULL;
542 struct devstat *snap_present_iter, *snap_previous_iter;
543 struct timespec tsnap_present;
545 struct gident *geom_id;
549 const char *disk_name;
550 derive_t read_bytes, write_bytes;
551 derive_t read_ops, write_ops;
552 derive_t read_time, write_time;
554 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
555 if (snap_present != NULL)
556 geom_stats_snapshot_free(snap_present);
558 /* Get a fresh copy of stats snapshot */
559 snap_present = geom_stats_snapshot_get();
560 if (snap_present == NULL) {
561 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
565 /* Check if we have dirty read from this snapshot */
567 geom_stats_snapshot_reset(snap_present);
568 while ((snap_present_iter = geom_stats_snapshot_next(snap_present)) != NULL) {
569 if (snap_present_iter->id == NULL)
571 geom_id = geom_lookupid(&geom_tree, snap_present_iter->id);
573 /* New device? refresh GEOM tree */
574 if (geom_id == NULL) {
575 geom_deletetree(&geom_tree);
576 if (geom_gettree(&geom_tree) != 0) {
577 ERROR("disk plugin: geom_gettree() failed");
578 geom_stats_snapshot_free(snap_present);
581 geom_id = geom_lookupid(&geom_tree, snap_present_iter->id);
584 * This should be rare: the device come right before we take the
585 * snapshot and went away right after it. We will handle this
586 * case later, so don't mark dirty but silently ignore it.
591 /* Only collect PROVIDER data */
592 if (geom_id->lg_what != ISPROVIDER)
595 /* Only collect data when rank is 1 (physical devices) */
596 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
599 /* Check if this is a dirty read quit for another try */
600 if (snap_present_iter->sequence0 != snap_present_iter->sequence1) {
608 * Now we have a snapshot that is either clean, or still dirty after 5
611 geom_stats_snapshot_timestamp(snap_present, &tsnap_present);
612 timedelta = tsnap_present.tv_sec - tsnap_previous.tv_sec;
613 timedelta += (tsnap_present.tv_nsec - tsnap_previous.tv_nsec) * 1e-9;
614 tsnap_previous = tsnap_present;
616 /* Reset iterators for both snapshots */
617 geom_stats_snapshot_reset(snap_present);
618 geom_stats_snapshot_reset(snap_previous);
620 snap_present_iter = geom_stats_snapshot_next(snap_present);
621 snap_previous_iter = geom_stats_snapshot_next(snap_previous);
622 if (snap_present_iter == NULL || snap_previous_iter == NULL)
625 if (snap_present_iter->id == NULL)
627 geom_id = geom_lookupid(&geom_tree, snap_present_iter->id);
630 if (geom_id->lg_what != ISPROVIDER)
632 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
634 /* Skip dirty reads, if present */
635 if (dirty && (snap_present_iter->sequence0 != snap_present_iter->sequence1))
638 devstat_compute_statistics(snap_present_iter, snap_previous_iter, timedelta,
639 DSM_TRANSFERS_PER_SECOND, &ld[0],
641 DSM_TRANSFERS_PER_SECOND_READ, &ld[1],
642 DSM_MB_PER_SECOND_READ, &ld[2],
643 DSM_MS_PER_TRANSACTION_READ, &ld[3],
645 DSM_TRANSFERS_PER_SECOND_WRITE, &ld[4],
646 DSM_MB_PER_SECOND_WRITE, &ld[5],
647 DSM_MS_PER_TRANSACTION_WRITE, &ld[6],
649 DSM_BUSY_PCT, &ld[7],
651 DSM_TRANSFERS_PER_SECOND_FREE, &ld[8],
652 DSM_MB_PER_SECOND_FREE, &ld[9],
653 DSM_MS_PER_TRANSACTION_FREE, &ld[10],
655 *snap_previous_iter = *snap_present_iter;
657 /* Derive data to be submitted */
658 read_ops = (derive_t)ld[1];
659 write_ops = (derive_t)ld[4];
660 read_bytes = (derive_t)(ld[2] * 1048576LL);
661 write_bytes = (derive_t)(ld[5] * 1048576LL);
662 read_time = (derive_t)ld[3];
663 write_time = (derive_t)ld[6];
665 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
667 if ((read_bytes != 0) || (write_bytes != 0))
668 disk_submit(disk_name, "disk_octets",
669 read_bytes, write_bytes);
671 if ((read_ops != 0) || (write_ops != 0))
672 disk_submit(disk_name, "disk_ops",
673 read_ops, write_ops);
675 if ((read_time != 0) || (write_time != 0))
676 disk_submit (disk_name, "disk_time",
677 read_time, write_time);
679 /* TODO: TRIM statistics collected but not reported. */
681 geom_stats_snapshot_free(snap_present);
693 derive_t read_sectors = 0;
694 derive_t write_sectors = 0;
696 derive_t read_ops = 0;
697 derive_t read_merged = 0;
698 derive_t read_time = 0;
699 derive_t write_ops = 0;
700 derive_t write_merged = 0;
701 derive_t write_time = 0;
702 gauge_t in_progress = NAN;
703 derive_t io_time = 0;
704 derive_t weighted_time = 0;
707 diskstats_t *ds, *pre_ds;
709 if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
711 fh = fopen ("/proc/partitions", "r");
714 ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
718 /* Kernel is 2.4.* */
723 handle_udev = udev_new();
726 while (fgets (buffer, sizeof (buffer), fh) != NULL)
732 numfields = strsplit (buffer, fields, 32);
734 if ((numfields != (14 + fieldshift)) && (numfields != 7))
737 minor = atoll (fields[1]);
739 disk_name = fields[2 + fieldshift];
741 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
742 if (strcmp (disk_name, ds->name) == 0)
747 if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
750 if ((ds->name = strdup (disk_name)) == NULL)
765 /* Kernel 2.6, Partition */
766 read_ops = atoll (fields[3]);
767 read_sectors = atoll (fields[4]);
768 write_ops = atoll (fields[5]);
769 write_sectors = atoll (fields[6]);
771 else if (numfields == (14 + fieldshift))
773 read_ops = atoll (fields[3 + fieldshift]);
774 write_ops = atoll (fields[7 + fieldshift]);
776 read_sectors = atoll (fields[5 + fieldshift]);
777 write_sectors = atoll (fields[9 + fieldshift]);
779 if ((fieldshift == 0) || (minor == 0))
782 read_merged = atoll (fields[4 + fieldshift]);
783 read_time = atoll (fields[6 + fieldshift]);
784 write_merged = atoll (fields[8 + fieldshift]);
785 write_time = atoll (fields[10+ fieldshift]);
787 in_progress = atof (fields[11 + fieldshift]);
789 io_time = atof (fields[12 + fieldshift]);
790 weighted_time = atof (fields[13 + fieldshift]);
795 DEBUG ("numfields = %i; => unknown file format.", numfields);
800 derive_t diff_read_sectors;
801 derive_t diff_write_sectors;
803 /* If the counter wraps around, it's only 32 bits.. */
804 if (read_sectors < ds->read_sectors)
805 diff_read_sectors = 1 + read_sectors
806 + (UINT_MAX - ds->read_sectors);
808 diff_read_sectors = read_sectors - ds->read_sectors;
809 if (write_sectors < ds->write_sectors)
810 diff_write_sectors = 1 + write_sectors
811 + (UINT_MAX - ds->write_sectors);
813 diff_write_sectors = write_sectors - ds->write_sectors;
815 ds->read_bytes += 512 * diff_read_sectors;
816 ds->write_bytes += 512 * diff_write_sectors;
817 ds->read_sectors = read_sectors;
818 ds->write_sectors = write_sectors;
821 /* Calculate the average time an io-op needs to complete */
824 derive_t diff_read_ops;
825 derive_t diff_write_ops;
826 derive_t diff_read_time;
827 derive_t diff_write_time;
829 if (read_ops < ds->read_ops)
830 diff_read_ops = 1 + read_ops
831 + (UINT_MAX - ds->read_ops);
833 diff_read_ops = read_ops - ds->read_ops;
834 DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
835 "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
837 read_ops, ds->read_ops, diff_read_ops);
839 if (write_ops < ds->write_ops)
840 diff_write_ops = 1 + write_ops
841 + (UINT_MAX - ds->write_ops);
843 diff_write_ops = write_ops - ds->write_ops;
845 if (read_time < ds->read_time)
846 diff_read_time = 1 + read_time
847 + (UINT_MAX - ds->read_time);
849 diff_read_time = read_time - ds->read_time;
851 if (write_time < ds->write_time)
852 diff_write_time = 1 + write_time
853 + (UINT_MAX - ds->write_time);
855 diff_write_time = write_time - ds->write_time;
857 if (diff_read_ops != 0)
858 ds->avg_read_time += disk_calc_time_incr (
859 diff_read_time, diff_read_ops);
860 if (diff_write_ops != 0)
861 ds->avg_write_time += disk_calc_time_incr (
862 diff_write_time, diff_write_ops);
864 ds->read_ops = read_ops;
865 ds->read_time = read_time;
866 ds->write_ops = write_ops;
867 ds->write_time = write_time;
870 /* Don't write to the RRDs if we've just started.. */
872 if (ds->poll_count <= 2)
874 DEBUG ("disk plugin: (ds->poll_count = %i) <= "
875 "(min_poll_count = 2); => Not writing.",
880 if ((read_ops == 0) && (write_ops == 0))
882 DEBUG ("disk plugin: ((read_ops == 0) && "
883 "(write_ops == 0)); => Not writing.");
887 output_name = disk_name;
890 alt_name = disk_udev_attr_name (handle_udev, disk_name,
891 conf_udev_name_attr);
895 if (alt_name != NULL)
896 output_name = alt_name;
898 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
899 disk_submit (output_name, "disk_octets",
900 ds->read_bytes, ds->write_bytes);
902 if ((ds->read_ops != 0) || (ds->write_ops != 0))
903 disk_submit (output_name, "disk_ops",
904 read_ops, write_ops);
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);
912 disk_submit (output_name, "disk_merged",
913 read_merged, write_merged);
914 submit_in_progress (output_name, in_progress);
915 submit_io_time (output_name, io_time, weighted_time);
918 /* release udev-based alternate name, if allocated */
920 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
923 udev_unref(handle_udev);
927 /* #endif defined(KERNEL_LINUX) */
930 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
931 # define KIO_ROCTETS reads
932 # define KIO_WOCTETS writes
933 # define KIO_ROPS nreads
934 # define KIO_WOPS nwrites
935 # define KIO_RTIME rtime
936 # define KIO_WTIME wtime
937 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
938 # define KIO_ROCTETS nread
939 # define KIO_WOCTETS nwritten
940 # define KIO_ROPS reads
941 # define KIO_WOPS writes
942 # define KIO_RTIME rtime
943 # define KIO_WTIME wtime
945 # error "kstat_io_t does not have the required members"
947 static kstat_io_t kio;
953 for (i = 0; i < numdisk; i++)
955 if (kstat_read (kc, ksp[i], &kio) == -1)
958 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
960 disk_submit (ksp[i]->ks_name, "disk_octets",
961 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
962 disk_submit (ksp[i]->ks_name, "disk_ops",
963 kio.KIO_ROPS, kio.KIO_WOPS);
964 /* FIXME: Convert this to microseconds if necessary */
965 disk_submit (ksp[i]->ks_name, "disk_time",
966 kio.KIO_RTIME, kio.KIO_WTIME);
968 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
970 disk_submit (ksp[i]->ks_name, "disk_octets",
971 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
972 disk_submit (ksp[i]->ks_name, "disk_ops",
973 kio.KIO_ROPS, kio.KIO_WOPS);
976 /* #endif defined(HAVE_LIBKSTAT) */
978 #elif defined(HAVE_LIBSTATGRAB)
979 sg_disk_io_stats *ds;
980 # if HAVE_LIBSTATGRAB_0_90
986 char name[DATA_MAX_NAME_LEN];
988 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
991 for (counter=0; counter < disks; counter++) {
992 strncpy(name, ds->disk_name, sizeof(name));
993 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
994 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
997 /* #endif defined(HAVE_LIBSTATGRAB) */
999 #elif defined(HAVE_PERFSTAT)
1000 derive_t read_sectors;
1001 derive_t write_sectors;
1003 derive_t write_time;
1006 perfstat_id_t firstpath;
1010 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
1013 WARNING ("disk plugin: perfstat_disk: %s",
1014 sstrerror (errno, errbuf, sizeof (errbuf)));
1018 if (numdisk != pnumdisk || stat_disk==NULL) {
1019 if (stat_disk!=NULL)
1021 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
1025 firstpath.name[0]='\0';
1026 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
1029 WARNING ("disk plugin: perfstat_disk : %s",
1030 sstrerror (errno, errbuf, sizeof (errbuf)));
1034 for (i = 0; i < rnumdisk; i++)
1036 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
1037 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
1038 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1040 read_ops = stat_disk[i].xrate;
1041 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1042 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
1044 read_time = stat_disk[i].rserv;
1045 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1046 write_time = stat_disk[i].wserv;
1047 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1048 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1050 #endif /* defined(HAVE_PERFSTAT) */
1053 } /* int disk_read */
1055 void module_register (void)
1057 plugin_register_config ("disk", disk_config,
1058 config_keys, config_keys_num);
1059 plugin_register_init ("disk", disk_init);
1060 plugin_register_read ("disk", disk_read);
1061 } /* void module_register */