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>
63 #define UINT_MAX 4294967295U
71 #ifndef _AIXVERSION_610
72 #include <sys/systemcfg.h>
74 #include <libperfstat.h>
75 #include <sys/protosw.h>
78 #if HAVE_IOKIT_IOKITLIB_H
79 static mach_port_t io_master_port = MACH_PORT_NULL;
80 /* This defaults to false for backwards compatibility. Please fix in the next
82 static bool use_bsd_name;
83 /* #endif HAVE_IOKIT_IOKITLIB_H */
86 typedef struct diskstats {
89 /* This overflows in roughly 1361 years */
90 unsigned int poll_count;
92 derive_t read_sectors;
93 derive_t write_sectors;
103 derive_t avg_read_time;
104 derive_t avg_write_time;
107 bool has_in_progress;
110 struct diskstats *next;
113 static diskstats_t *disklist;
114 /* #endif KERNEL_LINUX */
116 static struct gmesh geom_tree;
117 /* #endif KERNEL_FREEBSD */
123 #define MAX_NUMDISK 1024
124 extern kstat_ctl_t *kc;
125 static kstat_t *ksp[MAX_NUMDISK];
127 /* #endif HAVE_LIBKSTAT */
129 #elif defined(HAVE_LIBSTATGRAB)
130 /* #endif HAVE_LIBSTATGRAB */
133 static perfstat_disk_t *stat_disk;
136 /* #endif HAVE_PERFSTAT */
139 #error "No applicable input method."
145 static char *conf_udev_name_attr;
146 static struct udev *handle_udev;
149 static const char *config_keys[] = {"Disk", "UseBSDName", "IgnoreSelected",
151 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
153 static ignorelist_t *ignorelist;
155 static int disk_config(const char *key, const char *value) {
156 if (ignorelist == NULL)
157 ignorelist = ignorelist_create(/* invert = */ 1);
158 if (ignorelist == NULL)
161 if (strcasecmp("Disk", key) == 0) {
162 ignorelist_add(ignorelist, value);
163 } else if (strcasecmp("IgnoreSelected", key) == 0) {
167 ignorelist_set_invert(ignorelist, invert);
168 } else if (strcasecmp("UseBSDName", key) == 0) {
169 #if HAVE_IOKIT_IOKITLIB_H
170 use_bsd_name = IS_TRUE(value);
172 WARNING("disk plugin: The \"UseBSDName\" option is only supported "
173 "on Mach / Mac OS X and will be ignored.");
175 } else if (strcasecmp("UdevNameAttr", key) == 0) {
177 if (conf_udev_name_attr != NULL) {
178 free(conf_udev_name_attr);
179 conf_udev_name_attr = NULL;
181 if ((conf_udev_name_attr = strdup(value)) == NULL)
184 WARNING("disk plugin: The \"UdevNameAttr\" option is only supported "
185 "if collectd is built with libudev support");
192 } /* int disk_config */
194 static int disk_init(void) {
195 #if HAVE_IOKIT_IOKITLIB_H
196 kern_return_t status;
198 if (io_master_port != MACH_PORT_NULL) {
199 mach_port_deallocate(mach_task_self(), io_master_port);
200 io_master_port = MACH_PORT_NULL;
203 status = IOMasterPort(MACH_PORT_NULL, &io_master_port);
204 if (status != kIOReturnSuccess) {
205 ERROR("IOMasterPort failed: %s", mach_error_string(status));
206 io_master_port = MACH_PORT_NULL;
209 /* #endif HAVE_IOKIT_IOKITLIB_H */
213 if (conf_udev_name_attr != NULL) {
214 handle_udev = udev_new();
215 if (handle_udev == NULL) {
216 ERROR("disk plugin: udev_new() failed!");
220 #endif /* HAVE_LIBUDEV_H */
221 /* #endif KERNEL_LINUX */
226 rv = geom_gettree(&geom_tree);
228 ERROR("geom_gettree() failed, returned %d", rv);
231 rv = geom_stats_open();
233 ERROR("geom_stats_open() failed, returned %d", rv);
236 /* #endif KERNEL_FREEBSD */
246 for (numdisk = 0, ksp_chain = kc->kc_chain;
247 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
248 ksp_chain = ksp_chain->ks_next) {
249 if (strncmp(ksp_chain->ks_class, "disk", 4) &&
250 strncmp(ksp_chain->ks_class, "partition", 9))
252 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
254 ksp[numdisk++] = ksp_chain;
256 #endif /* HAVE_LIBKSTAT */
259 } /* int disk_init */
261 static int disk_shutdown(void) {
264 if (handle_udev != NULL)
265 udev_unref(handle_udev);
266 #endif /* HAVE_LIBUDEV_H */
267 #endif /* KERNEL_LINUX */
269 } /* int disk_shutdown */
271 static void disk_submit(const char *plugin_instance, const char *type,
272 derive_t read, derive_t write) {
273 value_list_t vl = VALUE_LIST_INIT;
275 {.derive = read}, {.derive = write},
279 vl.values_len = STATIC_ARRAY_SIZE(values);
280 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
281 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
282 sstrncpy(vl.type, type, sizeof(vl.type));
284 plugin_dispatch_values(&vl);
285 } /* void disk_submit */
287 #if KERNEL_FREEBSD || KERNEL_LINUX
288 static void submit_io_time(char const *plugin_instance, derive_t io_time,
289 derive_t weighted_time) {
290 value_list_t vl = VALUE_LIST_INIT;
292 {.derive = io_time}, {.derive = weighted_time},
296 vl.values_len = STATIC_ARRAY_SIZE(values);
297 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
298 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
299 sstrncpy(vl.type, "disk_io_time", sizeof(vl.type));
301 plugin_dispatch_values(&vl);
302 } /* void submit_io_time */
304 static void submit_in_progress(char const *disk_name, gauge_t in_progress) {
305 value_list_t vl = VALUE_LIST_INIT;
307 vl.values = &(value_t){.gauge = in_progress};
309 sstrncpy(vl.plugin, "disk", sizeof(vl.plugin));
310 sstrncpy(vl.plugin_instance, disk_name, sizeof(vl.plugin_instance));
311 sstrncpy(vl.type, "pending_operations", sizeof(vl.type));
313 plugin_dispatch_values(&vl);
315 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
318 static counter_t disk_calc_time_incr(counter_t delta_time,
319 counter_t delta_ops) {
320 double interval = CDTIME_T_TO_DOUBLE(plugin_get_interval());
321 double avg_time = ((double)delta_time) / ((double)delta_ops);
322 double avg_time_incr = interval * avg_time;
324 return (counter_t)(avg_time_incr + .5);
330 * Attempt to provide an rename disk instance from an assigned udev attribute.
332 * On success, it returns a strduped char* to the desired attribute value.
333 * Otherwise it returns NULL.
336 static char *disk_udev_attr_name(struct udev *udev, char *disk_name,
338 struct udev_device *dev;
342 dev = udev_device_new_from_subsystem_sysname(udev, "block", disk_name);
344 prop = udev_device_get_property_value(dev, attr);
346 output = strdup(prop);
347 DEBUG("disk plugin: renaming %s => %s", disk_name, output);
349 udev_device_unref(dev);
355 #if HAVE_IOKIT_IOKITLIB_H
356 static signed long long dict_get_value(CFDictionaryRef dict, const char *key) {
357 signed long long val_int;
361 /* `key_obj' needs to be released. */
362 key_obj = CFStringCreateWithCString(kCFAllocatorDefault, key,
363 kCFStringEncodingASCII);
364 if (key_obj == NULL) {
365 DEBUG("CFStringCreateWithCString (%s) failed.", key);
369 /* get => we don't need to release (== free) the object */
370 val_obj = (CFNumberRef)CFDictionaryGetValue(dict, key_obj);
374 if (val_obj == NULL) {
375 DEBUG("CFDictionaryGetValue (%s) failed.", key);
379 if (!CFNumberGetValue(val_obj, kCFNumberSInt64Type, &val_int)) {
380 DEBUG("CFNumberGetValue (%s) failed.", key);
386 #endif /* HAVE_IOKIT_IOKITLIB_H */
388 static int disk_read(void) {
389 #if HAVE_IOKIT_IOKITLIB_H
390 io_registry_entry_t disk;
391 io_registry_entry_t disk_child;
392 io_iterator_t disk_list;
393 CFMutableDictionaryRef props_dict, child_dict;
394 CFDictionaryRef stats_dict;
395 CFStringRef tmp_cf_string_ref;
396 kern_return_t status;
398 signed long long read_ops, read_byt, read_tme;
399 signed long long write_ops, write_byt, write_tme;
401 int disk_major, disk_minor;
402 char disk_name[DATA_MAX_NAME_LEN];
403 char child_disk_name_bsd[DATA_MAX_NAME_LEN],
404 props_disk_name_bsd[DATA_MAX_NAME_LEN];
406 /* Get the list of all disk objects. */
407 if (IOServiceGetMatchingServices(
408 io_master_port, IOServiceMatching(kIOBlockStorageDriverClass),
409 &disk_list) != kIOReturnSuccess) {
410 ERROR("disk plugin: IOServiceGetMatchingServices failed.");
414 while ((disk = IOIteratorNext(disk_list)) != 0) {
419 /* get child of disk entry and corresponding property dictionary */
420 if ((status = IORegistryEntryGetChildEntry(
421 disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
422 /* This fails for example for DVD/CD drives, which we want to ignore
424 DEBUG("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
425 IOObjectRelease(disk);
428 if (IORegistryEntryCreateCFProperties(
429 disk_child, (CFMutableDictionaryRef *)&child_dict,
430 kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess ||
431 child_dict == NULL) {
432 ERROR("disk plugin: IORegistryEntryCreateCFProperties (disk_child) "
434 IOObjectRelease(disk_child);
435 IOObjectRelease(disk);
439 /* extract name and major/minor numbers */
440 memset(child_disk_name_bsd, 0, sizeof(child_disk_name_bsd));
442 (CFStringRef)CFDictionaryGetValue(child_dict, CFSTR(kIOBSDNameKey));
443 if (tmp_cf_string_ref) {
444 assert(CFGetTypeID(tmp_cf_string_ref) == CFStringGetTypeID());
445 CFStringGetCString(tmp_cf_string_ref, child_disk_name_bsd,
446 sizeof(child_disk_name_bsd), kCFStringEncodingUTF8);
448 disk_major = (int)dict_get_value(child_dict, kIOBSDMajorKey);
449 disk_minor = (int)dict_get_value(child_dict, kIOBSDMinorKey);
450 DEBUG("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d",
451 child_disk_name_bsd, disk_major, disk_minor);
452 CFRelease(child_dict);
453 IOObjectRelease(disk_child);
455 /* get property dictionary of the disk entry itself */
456 if (IORegistryEntryCreateCFProperties(
457 disk, (CFMutableDictionaryRef *)&props_dict, kCFAllocatorDefault,
458 kNilOptions) != kIOReturnSuccess ||
459 props_dict == NULL) {
460 ERROR("disk-plugin: IORegistryEntryCreateCFProperties failed.");
461 IOObjectRelease(disk);
465 /* extract name and stats dictionary */
466 memset(props_disk_name_bsd, 0, sizeof(props_disk_name_bsd));
468 (CFStringRef)CFDictionaryGetValue(props_dict, CFSTR(kIOBSDNameKey));
469 if (tmp_cf_string_ref) {
470 assert(CFGetTypeID(tmp_cf_string_ref) == CFStringGetTypeID());
471 CFStringGetCString(tmp_cf_string_ref, props_disk_name_bsd,
472 sizeof(props_disk_name_bsd), kCFStringEncodingUTF8);
474 stats_dict = (CFDictionaryRef)CFDictionaryGetValue(
475 props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));
476 if (stats_dict == NULL) {
477 ERROR("disk plugin: CFDictionaryGetValue (%s) failed.",
478 kIOBlockStorageDriverStatisticsKey);
479 CFRelease(props_dict);
480 IOObjectRelease(disk);
483 DEBUG("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
487 if (child_disk_name_bsd[0] != 0)
488 sstrncpy(disk_name, child_disk_name_bsd, sizeof(disk_name));
489 else if (props_disk_name_bsd[0] != 0)
490 sstrncpy(disk_name, props_disk_name_bsd, sizeof(disk_name));
492 ERROR("disk plugin: can't find bsd disk name.");
493 snprintf(disk_name, sizeof(disk_name), "%i-%i", disk_major, disk_minor);
496 snprintf(disk_name, sizeof(disk_name), "%i-%i", disk_major, disk_minor);
498 DEBUG("disk plugin: disk_name = \"%s\"", disk_name);
500 /* check the name against ignore list */
501 if (ignorelist_match(ignorelist, disk_name) != 0) {
502 CFRelease(props_dict);
503 IOObjectRelease(disk);
507 /* extract the stats */
509 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
511 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
512 read_tme = dict_get_value(stats_dict,
513 kIOBlockStorageDriverStatisticsTotalReadTimeKey);
515 dict_get_value(stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
516 write_byt = dict_get_value(stats_dict,
517 kIOBlockStorageDriverStatisticsBytesWrittenKey);
518 write_tme = dict_get_value(
519 stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
520 CFRelease(props_dict);
521 IOObjectRelease(disk);
524 if ((read_byt != -1LL) || (write_byt != -1LL))
525 disk_submit(disk_name, "disk_octets", read_byt, write_byt);
526 if ((read_ops != -1LL) || (write_ops != -1LL))
527 disk_submit(disk_name, "disk_ops", read_ops, write_ops);
528 if ((read_tme != -1LL) || (write_tme != -1LL))
529 disk_submit(disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
531 IOObjectRelease(disk_list);
532 /* #endif HAVE_IOKIT_IOKITLIB_H */
538 struct devstat *snap_iter;
540 struct gident *geom_id;
542 const char *disk_name;
543 long double read_time, write_time, busy_time, total_duration;
544 uint64_t queue_length;
546 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
548 geom_stats_snapshot_free(snap);
550 /* Get a fresh copy of stats snapshot */
551 snap = geom_stats_snapshot_get();
553 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
557 /* Check if we have dirty read from this snapshot */
559 geom_stats_snapshot_reset(snap);
560 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
561 if (snap_iter->id == NULL)
563 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
565 /* New device? refresh GEOM tree */
566 if (geom_id == NULL) {
567 geom_deletetree(&geom_tree);
568 if (geom_gettree(&geom_tree) != 0) {
569 ERROR("disk plugin: geom_gettree() failed");
570 geom_stats_snapshot_free(snap);
573 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
576 * This should be rare: the device come right before we take the
577 * snapshot and went away right after it. We will handle this
578 * case later, so don't mark dirty but silently ignore it.
583 /* Only collect PROVIDER data */
584 if (geom_id->lg_what != ISPROVIDER)
587 /* Only collect data when rank is 1 (physical devices) */
588 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
591 /* Check if this is a dirty read quit for another try */
592 if (snap_iter->sequence0 != snap_iter->sequence1) {
600 geom_stats_snapshot_reset(snap);
602 snap_iter = geom_stats_snapshot_next(snap);
603 if (snap_iter == NULL)
606 if (snap_iter->id == NULL)
608 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
611 if (geom_id->lg_what != ISPROVIDER)
613 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
615 /* Skip dirty reads, if present */
616 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
619 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
621 if (ignorelist_match(ignorelist, disk_name) != 0)
624 if ((snap_iter->bytes[DEVSTAT_READ] != 0) ||
625 (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
626 disk_submit(disk_name, "disk_octets",
627 (derive_t)snap_iter->bytes[DEVSTAT_READ],
628 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
631 if ((snap_iter->operations[DEVSTAT_READ] != 0) ||
632 (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
633 disk_submit(disk_name, "disk_ops",
634 (derive_t)snap_iter->operations[DEVSTAT_READ],
635 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
638 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
640 devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
641 if ((read_time != 0) || (write_time != 0)) {
642 disk_submit(disk_name, "disk_time", (derive_t)(read_time * 1000),
643 (derive_t)(write_time * 1000));
645 if (devstat_compute_statistics(snap_iter, NULL, 1.0, DSM_TOTAL_BUSY_TIME,
646 &busy_time, DSM_TOTAL_DURATION,
647 &total_duration, DSM_QUEUE_LENGTH,
648 &queue_length, DSM_NONE) != 0) {
649 WARNING("%s", devstat_errbuf);
651 submit_io_time(disk_name, busy_time, total_duration);
652 submit_in_progress(disk_name, (gauge_t)queue_length);
655 geom_stats_snapshot_free(snap);
662 static unsigned int poll_count = 0;
664 derive_t read_sectors = 0;
665 derive_t write_sectors = 0;
667 derive_t read_ops = 0;
668 derive_t read_merged = 0;
669 derive_t read_time = 0;
670 derive_t write_ops = 0;
671 derive_t write_merged = 0;
672 derive_t write_time = 0;
673 gauge_t in_progress = NAN;
674 derive_t io_time = 0;
675 derive_t weighted_time = 0;
678 diskstats_t *ds, *pre_ds;
680 if ((fh = fopen("/proc/diskstats", "r")) == NULL) {
681 ERROR("disk plugin: fopen(\"/proc/diskstats\"): %s", STRERRNO);
686 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
687 int numfields = strsplit(buffer, fields, 32);
689 /* need either 7 fields (partition) or at least 14 fields */
690 if ((numfields != 7) && (numfields < 14))
693 char *disk_name = fields[2];
695 for (ds = disklist, pre_ds = disklist; ds != NULL;
696 pre_ds = ds, ds = ds->next)
697 if (strcmp(disk_name, ds->name) == 0)
701 if ((ds = calloc(1, sizeof(*ds))) == NULL)
704 if ((ds->name = strdup(disk_name)) == NULL) {
716 if (numfields == 7) {
717 /* Kernel 2.6, Partition */
718 read_ops = atoll(fields[3]);
719 read_sectors = atoll(fields[4]);
720 write_ops = atoll(fields[5]);
721 write_sectors = atoll(fields[6]);
723 assert(numfields >= 14);
724 read_ops = atoll(fields[3]);
725 write_ops = atoll(fields[7]);
727 read_sectors = atoll(fields[5]);
728 write_sectors = atoll(fields[9]);
731 read_merged = atoll(fields[4]);
732 read_time = atoll(fields[6]);
733 write_merged = atoll(fields[8]);
734 write_time = atoll(fields[10]);
736 in_progress = atof(fields[11]);
738 io_time = atof(fields[12]);
739 weighted_time = atof(fields[13]);
743 derive_t diff_read_sectors;
744 derive_t diff_write_sectors;
746 /* If the counter wraps around, it's only 32 bits.. */
747 if (read_sectors < ds->read_sectors)
748 diff_read_sectors = 1 + read_sectors + (UINT_MAX - ds->read_sectors);
750 diff_read_sectors = read_sectors - ds->read_sectors;
751 if (write_sectors < ds->write_sectors)
752 diff_write_sectors = 1 + write_sectors + (UINT_MAX - ds->write_sectors);
754 diff_write_sectors = write_sectors - ds->write_sectors;
756 ds->read_bytes += 512 * diff_read_sectors;
757 ds->write_bytes += 512 * diff_write_sectors;
758 ds->read_sectors = read_sectors;
759 ds->write_sectors = write_sectors;
762 /* Calculate the average time an io-op needs to complete */
764 derive_t diff_read_ops;
765 derive_t diff_write_ops;
766 derive_t diff_read_time;
767 derive_t diff_write_time;
769 if (read_ops < ds->read_ops)
770 diff_read_ops = 1 + read_ops + (UINT_MAX - ds->read_ops);
772 diff_read_ops = read_ops - ds->read_ops;
773 DEBUG("disk plugin: disk_name = %s; read_ops = %" PRIi64 "; "
774 "ds->read_ops = %" PRIi64 "; diff_read_ops = %" PRIi64 ";",
775 disk_name, read_ops, ds->read_ops, diff_read_ops);
777 if (write_ops < ds->write_ops)
778 diff_write_ops = 1 + write_ops + (UINT_MAX - ds->write_ops);
780 diff_write_ops = write_ops - ds->write_ops;
782 if (read_time < ds->read_time)
783 diff_read_time = 1 + read_time + (UINT_MAX - ds->read_time);
785 diff_read_time = read_time - ds->read_time;
787 if (write_time < ds->write_time)
788 diff_write_time = 1 + write_time + (UINT_MAX - ds->write_time);
790 diff_write_time = write_time - ds->write_time;
792 if (diff_read_ops != 0)
793 ds->avg_read_time += disk_calc_time_incr(diff_read_time, diff_read_ops);
794 if (diff_write_ops != 0)
795 ds->avg_write_time +=
796 disk_calc_time_incr(diff_write_time, diff_write_ops);
798 ds->read_ops = read_ops;
799 ds->read_time = read_time;
800 ds->write_ops = write_ops;
801 ds->write_time = write_time;
803 if (read_merged || write_merged)
804 ds->has_merged = true;
807 ds->has_in_progress = true;
810 ds->has_io_time = true;
814 /* Skip first cycle for newly-added disk */
815 if (ds->poll_count == 0) {
816 DEBUG("disk plugin: (ds->poll_count = 0) => Skipping.");
817 ds->poll_count = poll_count;
820 ds->poll_count = poll_count;
822 if ((read_ops == 0) && (write_ops == 0)) {
823 DEBUG("disk plugin: ((read_ops == 0) && "
824 "(write_ops == 0)); => Not writing.");
828 char *output_name = disk_name;
831 char *alt_name = NULL;
832 if (conf_udev_name_attr != NULL) {
834 disk_udev_attr_name(handle_udev, disk_name, conf_udev_name_attr);
835 if (alt_name != NULL)
836 output_name = alt_name;
840 if (ignorelist_match(ignorelist, output_name) != 0) {
842 /* release udev-based alternate name, if allocated */
848 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
849 disk_submit(output_name, "disk_octets", ds->read_bytes, ds->write_bytes);
851 if ((ds->read_ops != 0) || (ds->write_ops != 0))
852 disk_submit(output_name, "disk_ops", read_ops, write_ops);
854 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
855 disk_submit(output_name, "disk_time", ds->avg_read_time,
860 disk_submit(output_name, "disk_merged", read_merged, write_merged);
861 if (ds->has_in_progress)
862 submit_in_progress(output_name, in_progress);
864 submit_io_time(output_name, io_time, weighted_time);
868 /* release udev-based alternate name, if allocated */
871 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
873 /* Remove disks that have disappeared from diskstats */
874 for (ds = disklist, pre_ds = disklist; ds != NULL;) {
876 if (ds->poll_count == poll_count) {
882 /* Disk is missing, remove it */
883 diskstats_t *missing_ds = ds;
884 if (ds == disklist) {
885 pre_ds = disklist = ds->next;
887 pre_ds->next = ds->next;
891 DEBUG("disk plugin: Disk %s disappeared.", missing_ds->name);
892 free(missing_ds->name);
896 /* #endif defined(KERNEL_LINUX) */
899 #if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
900 #define KIO_ROCTETS reads
901 #define KIO_WOCTETS writes
902 #define KIO_ROPS nreads
903 #define KIO_WOPS nwrites
904 #define KIO_RTIME rtime
905 #define KIO_WTIME wtime
906 #elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && \
907 HAVE_KSTAT_IO_T_WTIME
908 #define KIO_ROCTETS nread
909 #define KIO_WOCTETS nwritten
910 #define KIO_ROPS reads
911 #define KIO_WOPS writes
912 #define KIO_RTIME rtime
913 #define KIO_WTIME wtime
915 #error "kstat_io_t does not have the required members"
917 static kstat_io_t kio;
922 for (int i = 0; i < numdisk; i++) {
923 if (kstat_read(kc, ksp[i], &kio) == -1)
926 if (strncmp(ksp[i]->ks_class, "disk", 4) == 0) {
927 if (ignorelist_match(ignorelist, ksp[i]->ks_name) != 0)
930 disk_submit(ksp[i]->ks_name, "disk_octets", kio.KIO_ROCTETS,
932 disk_submit(ksp[i]->ks_name, "disk_ops", kio.KIO_ROPS, kio.KIO_WOPS);
933 /* FIXME: Convert this to microseconds if necessary */
934 disk_submit(ksp[i]->ks_name, "disk_time", kio.KIO_RTIME, kio.KIO_WTIME);
935 } else if (strncmp(ksp[i]->ks_class, "partition", 9) == 0) {
936 if (ignorelist_match(ignorelist, ksp[i]->ks_name) != 0)
939 disk_submit(ksp[i]->ks_name, "disk_octets", kio.KIO_ROCTETS,
941 disk_submit(ksp[i]->ks_name, "disk_ops", kio.KIO_ROPS, kio.KIO_WOPS);
944 /* #endif defined(HAVE_LIBKSTAT) */
946 #elif defined(HAVE_LIBSTATGRAB)
947 sg_disk_io_stats *ds;
948 #if HAVE_LIBSTATGRAB_0_90
953 char name[DATA_MAX_NAME_LEN];
955 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
958 for (int counter = 0; counter < disks; counter++) {
959 strncpy(name, ds->disk_name, sizeof(name));
960 name[sizeof(name) - 1] =
961 '\0'; /* strncpy doesn't terminate longer strings */
963 if (ignorelist_match(ignorelist, name) != 0) {
968 disk_submit(name, "disk_octets", ds->read_bytes, ds->write_bytes);
971 /* #endif defined(HAVE_LIBSTATGRAB) */
973 #elif defined(HAVE_PERFSTAT)
974 derive_t read_sectors;
975 derive_t write_sectors;
980 perfstat_id_t firstpath;
983 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0) {
984 WARNING("disk plugin: perfstat_disk: %s", STRERRNO);
988 if (numdisk != pnumdisk || stat_disk == NULL) {
990 stat_disk = calloc(numdisk, sizeof(*stat_disk));
994 firstpath.name[0] = '\0';
995 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t),
997 WARNING("disk plugin: perfstat_disk : %s", STRERRNO);
1001 for (int i = 0; i < rnumdisk; i++) {
1002 if (ignorelist_match(ignorelist, stat_disk[i].name) != 0)
1005 read_sectors = stat_disk[i].rblks * stat_disk[i].bsize;
1006 write_sectors = stat_disk[i].wblks * stat_disk[i].bsize;
1007 disk_submit(stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1009 read_ops = stat_disk[i].xrate;
1010 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1011 disk_submit(stat_disk[i].name, "disk_ops", read_ops, write_ops);
1013 read_time = stat_disk[i].rserv;
1014 read_time *= ((double)(_system_configuration.Xint) /
1015 (double)(_system_configuration.Xfrac)) /
1017 write_time = stat_disk[i].wserv;
1018 write_time *= ((double)(_system_configuration.Xint) /
1019 (double)(_system_configuration.Xfrac)) /
1021 disk_submit(stat_disk[i].name, "disk_time", read_time, write_time);
1023 #endif /* defined(HAVE_PERFSTAT) */
1026 } /* int disk_read */
1028 void module_register(void) {
1029 plugin_register_config("disk", disk_config, config_keys, config_keys_num);
1030 plugin_register_init("disk", disk_init);
1031 plugin_register_shutdown("disk", disk_shutdown);
1032 plugin_register_read("disk", disk_read);
1033 } /* void module_register */