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/common/common.h"
28 #include "utils/ignorelist/ignorelist.h"
30 #if HAVE_MACH_MACH_TYPES_H
31 #include <mach/mach_types.h>
33 #if HAVE_MACH_MACH_INIT_H
34 #include <mach/mach_init.h>
36 #if HAVE_MACH_MACH_ERROR_H
37 #include <mach/mach_error.h>
39 #if HAVE_MACH_MACH_PORT_H
40 #include <mach/mach_port.h>
42 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
43 #include <CoreFoundation/CoreFoundation.h>
45 #if HAVE_IOKIT_IOKITLIB_H
46 #include <IOKit/IOKitLib.h>
48 #if HAVE_IOKIT_IOTYPES_H
49 #include <IOKit/IOTypes.h>
51 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
52 #include <IOKit/storage/IOBlockStorageDriver.h>
54 #if HAVE_IOKIT_IOBSD_H
55 #include <IOKit/IOBSD.h>
66 #define UINT_MAX 4294967295U
74 #ifndef _AIXVERSION_610
75 #include <sys/systemcfg.h>
77 #include <libperfstat.h>
78 #include <sys/protosw.h>
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
85 static bool use_bsd_name;
86 /* #endif HAVE_IOKIT_IOKITLIB_H */
89 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 */
126 #define MAX_NUMDISK 1024
127 extern kstat_ctl_t *kc;
128 static kstat_t *ksp[MAX_NUMDISK];
130 /* #endif HAVE_LIBKSTAT */
132 #elif defined(HAVE_LIBSTATGRAB)
133 /* #endif HAVE_LIBSTATGRAB */
136 static perfstat_disk_t *stat_disk;
139 /* #endif HAVE_PERFSTAT */
142 #error "No applicable input method."
148 static char *conf_udev_name_attr;
149 static struct udev *handle_udev;
152 static const char *config_keys[] = {"Disk", "UseBSDName", "IgnoreSelected",
154 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
156 static ignorelist_t *ignorelist;
158 static int disk_config(const char *key, const char *value) {
159 if (ignorelist == NULL)
160 ignorelist = ignorelist_create(/* invert = */ 1);
161 if (ignorelist == NULL)
164 if (strcasecmp("Disk", key) == 0) {
165 ignorelist_add(ignorelist, value);
166 } else if (strcasecmp("IgnoreSelected", key) == 0) {
170 ignorelist_set_invert(ignorelist, invert);
171 } else if (strcasecmp("UseBSDName", key) == 0) {
172 #if HAVE_IOKIT_IOKITLIB_H
173 use_bsd_name = IS_TRUE(value);
175 WARNING("disk plugin: The \"UseBSDName\" option is only supported "
176 "on Mach / Mac OS X and will be ignored.");
178 } else if (strcasecmp("UdevNameAttr", key) == 0) {
180 if (conf_udev_name_attr != NULL) {
181 free(conf_udev_name_attr);
182 conf_udev_name_attr = NULL;
184 if ((conf_udev_name_attr = strdup(value)) == NULL)
187 WARNING("disk plugin: The \"UdevNameAttr\" option is only supported "
188 "if collectd is built with libudev support");
195 } /* int disk_config */
197 static int disk_init(void) {
198 #if HAVE_IOKIT_IOKITLIB_H
199 kern_return_t status;
201 if (io_master_port != MACH_PORT_NULL) {
202 mach_port_deallocate(mach_task_self(), io_master_port);
203 io_master_port = MACH_PORT_NULL;
206 status = IOMasterPort(MACH_PORT_NULL, &io_master_port);
207 if (status != kIOReturnSuccess) {
208 ERROR("IOMasterPort failed: %s", mach_error_string(status));
209 io_master_port = MACH_PORT_NULL;
212 /* #endif HAVE_IOKIT_IOKITLIB_H */
216 if (conf_udev_name_attr != NULL) {
217 handle_udev = udev_new();
218 if (handle_udev == NULL) {
219 ERROR("disk plugin: udev_new() failed!");
223 #endif /* HAVE_LIBUDEV_H */
224 /* #endif KERNEL_LINUX */
229 rv = geom_gettree(&geom_tree);
231 ERROR("geom_gettree() failed, returned %d", rv);
234 rv = geom_stats_open();
236 ERROR("geom_stats_open() failed, returned %d", rv);
239 /* #endif KERNEL_FREEBSD */
249 for (numdisk = 0, ksp_chain = kc->kc_chain;
250 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
251 ksp_chain = ksp_chain->ks_next) {
252 if (strncmp(ksp_chain->ks_class, "disk", 4) &&
253 strncmp(ksp_chain->ks_class, "partition", 9))
255 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
257 ksp[numdisk++] = ksp_chain;
259 #endif /* HAVE_LIBKSTAT */
262 } /* int disk_init */
264 static int disk_shutdown(void) {
267 if (handle_udev != NULL)
268 udev_unref(handle_udev);
269 #endif /* HAVE_LIBUDEV_H */
270 #endif /* KERNEL_LINUX */
272 } /* int disk_shutdown */
274 static void disk_submit(const char *plugin_instance, const char *type,
275 derive_t read, derive_t write) {
276 value_list_t vl = VALUE_LIST_INIT;
283 vl.values_len = STATIC_ARRAY_SIZE(values);
284 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
285 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
286 sstrncpy(vl.type, type, sizeof(vl.type));
288 plugin_dispatch_values(&vl);
289 } /* void disk_submit */
291 #if KERNEL_FREEBSD || KERNEL_LINUX
292 static void submit_io_time(char const *plugin_instance, derive_t io_time,
293 derive_t weighted_time) {
294 value_list_t vl = VALUE_LIST_INIT;
297 {.derive = weighted_time},
301 vl.values_len = STATIC_ARRAY_SIZE(values);
302 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
303 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
304 sstrncpy(vl.type, "disk_io_time", sizeof(vl.type));
306 plugin_dispatch_values(&vl);
307 } /* void submit_io_time */
309 static void submit_in_progress(char const *disk_name, gauge_t in_progress) {
310 value_list_t vl = VALUE_LIST_INIT;
312 vl.values = &(value_t){.gauge = in_progress};
314 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
315 sstrncpy(vl.plugin_instance, disk_name, sizeof(vl.plugin_instance));
316 sstrncpy(vl.type, "pending_operations", sizeof(vl.type));
318 plugin_dispatch_values(&vl);
320 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
323 static counter_t disk_calc_time_incr(counter_t delta_time,
324 counter_t delta_ops) {
325 double interval = CDTIME_T_TO_DOUBLE(plugin_get_interval());
326 double avg_time = ((double)delta_time) / ((double)delta_ops);
327 double avg_time_incr = interval * avg_time;
329 return (counter_t)(avg_time_incr + .5);
335 * Attempt to provide an rename disk instance from an assigned udev attribute.
337 * On success, it returns a strduped char* to the desired attribute value.
338 * Otherwise it returns NULL.
341 static char *disk_udev_attr_name(struct udev *udev, char *disk_name,
343 struct udev_device *dev;
347 dev = udev_device_new_from_subsystem_sysname(udev, "block", disk_name);
349 prop = udev_device_get_property_value(dev, attr);
351 output = strdup(prop);
352 DEBUG("disk plugin: renaming %s => %s", disk_name, output);
354 udev_device_unref(dev);
360 #if HAVE_IOKIT_IOKITLIB_H
361 static signed long long dict_get_value(CFDictionaryRef dict, const char *key) {
362 signed long long val_int;
366 /* `key_obj' needs to be released. */
367 key_obj = CFStringCreateWithCString(kCFAllocatorDefault, key,
368 kCFStringEncodingASCII);
369 if (key_obj == NULL) {
370 DEBUG("CFStringCreateWithCString (%s) failed.", key);
374 /* get => we don't need to release (== free) the object */
375 val_obj = (CFNumberRef)CFDictionaryGetValue(dict, key_obj);
379 if (val_obj == NULL) {
380 DEBUG("CFDictionaryGetValue (%s) failed.", key);
384 if (!CFNumberGetValue(val_obj, kCFNumberSInt64Type, &val_int)) {
385 DEBUG("CFNumberGetValue (%s) failed.", key);
391 #endif /* HAVE_IOKIT_IOKITLIB_H */
393 static int disk_read(void) {
394 #if HAVE_IOKIT_IOKITLIB_H
395 io_registry_entry_t disk;
396 io_registry_entry_t disk_child;
397 io_iterator_t disk_list;
398 CFMutableDictionaryRef props_dict, child_dict;
399 CFDictionaryRef stats_dict;
400 CFStringRef tmp_cf_string_ref;
401 kern_return_t status;
403 signed long long read_ops, read_byt, read_tme;
404 signed long long write_ops, write_byt, write_tme;
406 int disk_major, disk_minor;
407 char disk_name[DATA_MAX_NAME_LEN];
408 char child_disk_name_bsd[DATA_MAX_NAME_LEN],
409 props_disk_name_bsd[DATA_MAX_NAME_LEN];
411 /* Get the list of all disk objects. */
412 if (IOServiceGetMatchingServices(
413 io_master_port, IOServiceMatching(kIOBlockStorageDriverClass),
414 &disk_list) != kIOReturnSuccess) {
415 ERROR("disk plugin: IOServiceGetMatchingServices failed.");
419 while ((disk = IOIteratorNext(disk_list)) != 0) {
424 /* get child of disk entry and corresponding property dictionary */
425 if ((status = IORegistryEntryGetChildEntry(
426 disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
427 /* This fails for example for DVD/CD drives, which we want to ignore
429 DEBUG("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
430 IOObjectRelease(disk);
433 if (IORegistryEntryCreateCFProperties(
434 disk_child, (CFMutableDictionaryRef *)&child_dict,
435 kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess ||
436 child_dict == NULL) {
437 ERROR("disk plugin: IORegistryEntryCreateCFProperties (disk_child) "
439 IOObjectRelease(disk_child);
440 IOObjectRelease(disk);
444 /* extract name and major/minor numbers */
445 memset(child_disk_name_bsd, 0, sizeof(child_disk_name_bsd));
447 (CFStringRef)CFDictionaryGetValue(child_dict, CFSTR(kIOBSDNameKey));
448 if (tmp_cf_string_ref) {
449 assert(CFGetTypeID(tmp_cf_string_ref) == CFStringGetTypeID());
450 CFStringGetCString(tmp_cf_string_ref, child_disk_name_bsd,
451 sizeof(child_disk_name_bsd), kCFStringEncodingUTF8);
453 disk_major = (int)dict_get_value(child_dict, kIOBSDMajorKey);
454 disk_minor = (int)dict_get_value(child_dict, kIOBSDMinorKey);
455 DEBUG("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d",
456 child_disk_name_bsd, disk_major, disk_minor);
457 CFRelease(child_dict);
458 IOObjectRelease(disk_child);
460 /* get property dictionary of the disk entry itself */
461 if (IORegistryEntryCreateCFProperties(
462 disk, (CFMutableDictionaryRef *)&props_dict, kCFAllocatorDefault,
463 kNilOptions) != kIOReturnSuccess ||
464 props_dict == NULL) {
465 ERROR("disk-plugin: IORegistryEntryCreateCFProperties failed.");
466 IOObjectRelease(disk);
470 /* extract name and stats dictionary */
471 memset(props_disk_name_bsd, 0, sizeof(props_disk_name_bsd));
473 (CFStringRef)CFDictionaryGetValue(props_dict, CFSTR(kIOBSDNameKey));
474 if (tmp_cf_string_ref) {
475 assert(CFGetTypeID(tmp_cf_string_ref) == CFStringGetTypeID());
476 CFStringGetCString(tmp_cf_string_ref, props_disk_name_bsd,
477 sizeof(props_disk_name_bsd), kCFStringEncodingUTF8);
479 stats_dict = (CFDictionaryRef)CFDictionaryGetValue(
480 props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));
481 if (stats_dict == NULL) {
482 ERROR("disk plugin: CFDictionaryGetValue (%s) failed.",
483 kIOBlockStorageDriverStatisticsKey);
484 CFRelease(props_dict);
485 IOObjectRelease(disk);
488 DEBUG("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
492 if (child_disk_name_bsd[0] != 0)
493 sstrncpy(disk_name, child_disk_name_bsd, sizeof(disk_name));
494 else if (props_disk_name_bsd[0] != 0)
495 sstrncpy(disk_name, props_disk_name_bsd, sizeof(disk_name));
497 ERROR("disk plugin: can't find bsd disk name.");
498 ssnprintf(disk_name, sizeof(disk_name), "%i-%i", disk_major,
502 ssnprintf(disk_name, sizeof(disk_name), "%i-%i", disk_major, disk_minor);
504 DEBUG("disk plugin: disk_name = \"%s\"", disk_name);
506 /* check the name against ignore list */
507 if (ignorelist_match(ignorelist, disk_name) != 0) {
508 CFRelease(props_dict);
509 IOObjectRelease(disk);
513 /* extract the stats */
515 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
517 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
518 read_tme = dict_get_value(stats_dict,
519 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
521 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
522 write_byt = dict_get_value(stats_dict,
523 kIOBlockStorageDriverStatisticsBytesWrittenKey);
524 write_tme = dict_get_value(
525 stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
526 CFRelease(props_dict);
527 IOObjectRelease(disk);
530 if ((read_byt != -1LL) || (write_byt != -1LL))
531 disk_submit(disk_name, "disk_octets", read_byt, write_byt);
532 if ((read_ops != -1LL) || (write_ops != -1LL))
533 disk_submit(disk_name, "disk_ops", read_ops, write_ops);
534 if ((read_tme != -1LL) || (write_tme != -1LL))
535 disk_submit(disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
537 IOObjectRelease(disk_list);
538 /* #endif HAVE_IOKIT_IOKITLIB_H */
544 struct devstat *snap_iter;
546 struct gident *geom_id;
548 const char *disk_name;
549 long double read_time, write_time, busy_time, total_duration;
550 uint64_t queue_length;
552 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
554 geom_stats_snapshot_free(snap);
556 /* Get a fresh copy of stats snapshot */
557 snap = geom_stats_snapshot_get();
559 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
563 /* Check if we have dirty read from this snapshot */
565 geom_stats_snapshot_reset(snap);
566 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
567 if (snap_iter->id == NULL)
569 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
571 /* New device? refresh GEOM tree */
572 if (geom_id == NULL) {
573 geom_deletetree(&geom_tree);
574 if (geom_gettree(&geom_tree) != 0) {
575 ERROR("disk plugin: geom_gettree() failed");
576 geom_stats_snapshot_free(snap);
579 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
582 * This should be rare: the device come right before we take the
583 * snapshot and went away right after it. We will handle this
584 * case later, so don't mark dirty but silently ignore it.
589 /* Only collect PROVIDER data */
590 if (geom_id->lg_what != ISPROVIDER)
593 /* Only collect data when rank is 1 (physical devices) */
594 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
597 /* Check if this is a dirty read quit for another try */
598 if (snap_iter->sequence0 != snap_iter->sequence1) {
606 geom_stats_snapshot_reset(snap);
608 snap_iter = geom_stats_snapshot_next(snap);
609 if (snap_iter == NULL)
612 if (snap_iter->id == NULL)
614 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
617 if (geom_id->lg_what != ISPROVIDER)
619 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
621 /* Skip dirty reads, if present */
622 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
625 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
627 if (ignorelist_match(ignorelist, disk_name) != 0)
630 if ((snap_iter->bytes[DEVSTAT_READ] != 0) ||
631 (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
632 disk_submit(disk_name, "disk_octets",
633 (derive_t)snap_iter->bytes[DEVSTAT_READ],
634 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
637 if ((snap_iter->operations[DEVSTAT_READ] != 0) ||
638 (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
639 disk_submit(disk_name, "disk_ops",
640 (derive_t)snap_iter->operations[DEVSTAT_READ],
641 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
644 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
646 devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
647 if ((read_time != 0) || (write_time != 0)) {
648 disk_submit(disk_name, "disk_time", (derive_t)(read_time * 1000),
649 (derive_t)(write_time * 1000));
651 if (devstat_compute_statistics(snap_iter, NULL, 1.0, DSM_TOTAL_BUSY_TIME,
652 &busy_time, DSM_TOTAL_DURATION,
653 &total_duration, DSM_QUEUE_LENGTH,
654 &queue_length, DSM_NONE) != 0) {
655 WARNING("%s", devstat_errbuf);
657 submit_io_time(disk_name, busy_time, total_duration);
658 submit_in_progress(disk_name, (gauge_t)queue_length);
661 geom_stats_snapshot_free(snap);
668 static unsigned int poll_count = 0;
670 derive_t read_sectors = 0;
671 derive_t write_sectors = 0;
673 derive_t read_ops = 0;
674 derive_t read_merged = 0;
675 derive_t read_time = 0;
676 derive_t write_ops = 0;
677 derive_t write_merged = 0;
678 derive_t write_time = 0;
679 gauge_t in_progress = NAN;
680 derive_t io_time = 0;
681 derive_t weighted_time = 0;
684 diskstats_t *ds, *pre_ds;
686 if ((fh = fopen("/proc/diskstats", "r")) == NULL) {
687 ERROR("disk plugin: fopen(\"/proc/diskstats\"): %s", STRERRNO);
692 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
693 int numfields = strsplit(buffer, fields, 32);
695 /* need either 7 fields (partition) or at least 14 fields */
696 if ((numfields != 7) && (numfields < 14))
699 char *disk_name = fields[2];
701 for (ds = disklist, pre_ds = disklist; ds != NULL;
702 pre_ds = ds, ds = ds->next)
703 if (strcmp(disk_name, ds->name) == 0)
707 if ((ds = calloc(1, sizeof(*ds))) == NULL)
710 if ((ds->name = strdup(disk_name)) == NULL) {
722 if (numfields == 7) {
723 /* Kernel 2.6, Partition */
724 read_ops = atoll(fields[3]);
725 read_sectors = atoll(fields[4]);
726 write_ops = atoll(fields[5]);
727 write_sectors = atoll(fields[6]);
729 assert(numfields >= 14);
730 read_ops = atoll(fields[3]);
731 write_ops = atoll(fields[7]);
733 read_sectors = atoll(fields[5]);
734 write_sectors = atoll(fields[9]);
737 read_merged = atoll(fields[4]);
738 read_time = atoll(fields[6]);
739 write_merged = atoll(fields[8]);
740 write_time = atoll(fields[10]);
742 in_progress = atof(fields[11]);
744 io_time = atof(fields[12]);
745 weighted_time = atof(fields[13]);
749 derive_t diff_read_sectors;
750 derive_t diff_write_sectors;
752 /* If the counter wraps around, it's only 32 bits.. */
753 if (read_sectors < ds->read_sectors)
754 diff_read_sectors = 1 + read_sectors + (UINT_MAX - ds->read_sectors);
756 diff_read_sectors = read_sectors - ds->read_sectors;
757 if (write_sectors < ds->write_sectors)
758 diff_write_sectors = 1 + write_sectors + (UINT_MAX - ds->write_sectors);
760 diff_write_sectors = write_sectors - ds->write_sectors;
762 ds->read_bytes += 512 * diff_read_sectors;
763 ds->write_bytes += 512 * diff_write_sectors;
764 ds->read_sectors = read_sectors;
765 ds->write_sectors = write_sectors;
768 /* Calculate the average time an io-op needs to complete */
770 derive_t diff_read_ops;
771 derive_t diff_write_ops;
772 derive_t diff_read_time;
773 derive_t diff_write_time;
775 if (read_ops < ds->read_ops)
776 diff_read_ops = 1 + read_ops + (UINT_MAX - ds->read_ops);
778 diff_read_ops = read_ops - ds->read_ops;
779 DEBUG("disk plugin: disk_name = %s; read_ops = %" PRIi64 "; "
780 "ds->read_ops = %" PRIi64 "; diff_read_ops = %" PRIi64 ";",
781 disk_name, read_ops, ds->read_ops, diff_read_ops);
783 if (write_ops < ds->write_ops)
784 diff_write_ops = 1 + write_ops + (UINT_MAX - ds->write_ops);
786 diff_write_ops = write_ops - ds->write_ops;
788 if (read_time < ds->read_time)
789 diff_read_time = 1 + read_time + (UINT_MAX - ds->read_time);
791 diff_read_time = read_time - ds->read_time;
793 if (write_time < ds->write_time)
794 diff_write_time = 1 + write_time + (UINT_MAX - ds->write_time);
796 diff_write_time = write_time - ds->write_time;
798 if (diff_read_ops != 0)
799 ds->avg_read_time += disk_calc_time_incr(diff_read_time, diff_read_ops);
800 if (diff_write_ops != 0)
801 ds->avg_write_time +=
802 disk_calc_time_incr(diff_write_time, diff_write_ops);
804 ds->read_ops = read_ops;
805 ds->read_time = read_time;
806 ds->write_ops = write_ops;
807 ds->write_time = write_time;
809 if (read_merged || write_merged)
810 ds->has_merged = true;
813 ds->has_in_progress = true;
816 ds->has_io_time = true;
820 /* Skip first cycle for newly-added disk */
821 if (ds->poll_count == 0) {
822 DEBUG("disk plugin: (ds->poll_count = 0) => Skipping.");
823 ds->poll_count = poll_count;
826 ds->poll_count = poll_count;
828 if ((read_ops == 0) && (write_ops == 0)) {
829 DEBUG("disk plugin: ((read_ops == 0) && "
830 "(write_ops == 0)); => Not writing.");
834 char *output_name = disk_name;
837 char *alt_name = NULL;
838 if (conf_udev_name_attr != NULL) {
840 disk_udev_attr_name(handle_udev, disk_name, conf_udev_name_attr);
841 if (alt_name != NULL)
842 output_name = alt_name;
846 if (ignorelist_match(ignorelist, output_name) != 0) {
848 /* release udev-based alternate name, if allocated */
854 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
855 disk_submit(output_name, "disk_octets", ds->read_bytes, ds->write_bytes);
857 if ((ds->read_ops != 0) || (ds->write_ops != 0))
858 disk_submit(output_name, "disk_ops", read_ops, write_ops);
860 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
861 disk_submit(output_name, "disk_time", ds->avg_read_time,
866 disk_submit(output_name, "disk_merged", read_merged, write_merged);
867 if (ds->has_in_progress)
868 submit_in_progress(output_name, in_progress);
870 submit_io_time(output_name, io_time, weighted_time);
874 /* release udev-based alternate name, if allocated */
877 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
879 /* Remove disks that have disappeared from diskstats */
880 for (ds = disklist, pre_ds = disklist; ds != NULL;) {
882 if (ds->poll_count == poll_count) {
888 /* Disk is missing, remove it */
889 diskstats_t *missing_ds = ds;
890 if (ds == disklist) {
891 pre_ds = disklist = ds->next;
893 pre_ds->next = ds->next;
897 DEBUG("disk plugin: Disk %s disappeared.", missing_ds->name);
898 free(missing_ds->name);
902 /* #endif defined(KERNEL_LINUX) */
905 #if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
906 #define KIO_ROCTETS reads
907 #define KIO_WOCTETS writes
908 #define KIO_ROPS nreads
909 #define KIO_WOPS nwrites
910 #define KIO_RTIME rtime
911 #define KIO_WTIME wtime
912 #elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && \
913 HAVE_KSTAT_IO_T_WTIME
914 #define KIO_ROCTETS nread
915 #define KIO_WOCTETS nwritten
916 #define KIO_ROPS reads
917 #define KIO_WOPS writes
918 #define KIO_RTIME rtime
919 #define KIO_WTIME wtime
921 #error "kstat_io_t does not have the required members"
923 static kstat_io_t kio;
928 for (int i = 0; i < numdisk; i++) {
929 if (kstat_read(kc, ksp[i], &kio) == -1)
932 if (strncmp(ksp[i]->ks_class, "disk", 4) == 0) {
933 if (ignorelist_match(ignorelist, ksp[i]->ks_name) != 0)
936 disk_submit(ksp[i]->ks_name, "disk_octets", kio.KIO_ROCTETS,
938 disk_submit(ksp[i]->ks_name, "disk_ops", kio.KIO_ROPS, kio.KIO_WOPS);
939 /* FIXME: Convert this to microseconds if necessary */
940 disk_submit(ksp[i]->ks_name, "disk_time", kio.KIO_RTIME, kio.KIO_WTIME);
941 } else if (strncmp(ksp[i]->ks_class, "partition", 9) == 0) {
942 if (ignorelist_match(ignorelist, ksp[i]->ks_name) != 0)
945 disk_submit(ksp[i]->ks_name, "disk_octets", kio.KIO_ROCTETS,
947 disk_submit(ksp[i]->ks_name, "disk_ops", kio.KIO_ROPS, kio.KIO_WOPS);
950 /* #endif defined(HAVE_LIBKSTAT) */
952 #elif defined(HAVE_LIBSTATGRAB)
953 sg_disk_io_stats *ds;
954 #if HAVE_LIBSTATGRAB_0_90
959 char name[DATA_MAX_NAME_LEN];
961 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
964 for (int counter = 0; counter < disks; counter++) {
965 strncpy(name, ds->disk_name, sizeof(name));
966 name[sizeof(name) - 1] =
967 '\0'; /* strncpy doesn't terminate longer strings */
969 if (ignorelist_match(ignorelist, name) != 0) {
974 disk_submit(name, "disk_octets", ds->read_bytes, ds->write_bytes);
977 /* #endif defined(HAVE_LIBSTATGRAB) */
979 #elif defined(HAVE_PERFSTAT)
980 derive_t read_sectors;
981 derive_t write_sectors;
986 perfstat_id_t firstpath;
989 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0) {
990 WARNING("disk plugin: perfstat_disk: %s", STRERRNO);
994 if (numdisk != pnumdisk || stat_disk == NULL) {
996 stat_disk = calloc(numdisk, sizeof(*stat_disk));
1000 firstpath.name[0] = '\0';
1001 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t),
1003 WARNING("disk plugin: perfstat_disk : %s", STRERRNO);
1007 for (int i = 0; i < rnumdisk; i++) {
1008 if (ignorelist_match(ignorelist, stat_disk[i].name) != 0)
1011 read_sectors = stat_disk[i].rblks * stat_disk[i].bsize;
1012 write_sectors = stat_disk[i].wblks * stat_disk[i].bsize;
1013 disk_submit(stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1015 read_ops = stat_disk[i].xrate;
1016 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1017 disk_submit(stat_disk[i].name, "disk_ops", read_ops, write_ops);
1019 read_time = stat_disk[i].rserv;
1020 read_time *= ((double)(_system_configuration.Xint) /
1021 (double)(_system_configuration.Xfrac)) /
1023 write_time = stat_disk[i].wserv;
1024 write_time *= ((double)(_system_configuration.Xint) /
1025 (double)(_system_configuration.Xfrac)) /
1027 disk_submit(stat_disk[i].name, "disk_time", read_time, write_time);
1029 #endif /* defined(HAVE_PERFSTAT) */
1032 } /* int disk_read */
1034 void module_register(void) {
1035 plugin_register_config("disk", disk_config, config_keys, config_keys_num);
1036 plugin_register_init("disk", disk_init);
1037 plugin_register_shutdown("disk", disk_shutdown);
1038 plugin_register_read("disk", disk_read);
1039 } /* void module_register */