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 */
301 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
304 value_list_t vl = VALUE_LIST_INIT;
306 if (ignorelist_match (ignorelist, disk_name) != 0)
309 v.gauge = in_progress;
313 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
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);
321 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
324 value_list_t vl = VALUE_LIST_INIT;
326 if (ignorelist_match (ignorelist, plugin_instance) != 0)
329 values[0].derive = io_time;
330 values[1].derive = weighted_time;
334 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
335 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
336 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
337 sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
339 plugin_dispatch_values (&vl);
343 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
345 double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
346 double avg_time = ((double) delta_time) / ((double) delta_ops);
347 double avg_time_incr = interval * avg_time;
349 return ((counter_t) (avg_time_incr + .5));
355 * Attempt to provide an rename disk instance from an assigned udev attribute.
357 * On success, it returns a strduped char* to the desired attribute value.
358 * Otherwise it returns NULL.
361 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
363 struct udev_device *dev;
367 dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
370 prop = udev_device_get_property_value (dev, attr);
372 output = strdup (prop);
373 DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
375 udev_device_unref (dev);
381 #if HAVE_IOKIT_IOKITLIB_H
382 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
384 signed long long val_int;
388 /* `key_obj' needs to be released. */
389 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
390 kCFStringEncodingASCII);
393 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
397 /* get => we don't need to release (== free) the object */
398 val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
404 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
408 if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
410 DEBUG ("CFNumberGetValue (%s) failed.", key);
416 #endif /* HAVE_IOKIT_IOKITLIB_H */
418 static int disk_read (void)
420 #if HAVE_IOKIT_IOKITLIB_H
421 io_registry_entry_t disk;
422 io_registry_entry_t disk_child;
423 io_iterator_t disk_list;
424 CFMutableDictionaryRef props_dict, child_dict;
425 CFDictionaryRef stats_dict;
426 CFStringRef tmp_cf_string_ref;
427 kern_return_t status;
429 signed long long read_ops, read_byt, read_tme;
430 signed long long write_ops, write_byt, write_tme;
432 int disk_major, disk_minor;
433 char disk_name[DATA_MAX_NAME_LEN];
434 char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
436 /* Get the list of all disk objects. */
437 if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
438 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
442 while ((disk = IOIteratorNext (disk_list)) != 0) {
447 /* get child of disk entry and corresponding property dictionary */
448 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
449 /* This fails for example for DVD/CD drives, which we want to ignore anyway */
450 DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
451 IOObjectRelease (disk);
454 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
455 ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
456 IOObjectRelease (disk_child);
457 IOObjectRelease (disk);
461 /* extract name and major/minor numbers */
462 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
463 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
464 if (tmp_cf_string_ref) {
465 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
466 CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
468 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
469 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
470 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
471 CFRelease (child_dict);
472 IOObjectRelease (disk_child);
474 /* get property dictionary of the disk entry itself */
475 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
476 ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
477 IOObjectRelease (disk);
481 /* extract name and stats dictionary */
482 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
483 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
484 if (tmp_cf_string_ref) {
485 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
486 CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
488 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
489 if (stats_dict == NULL) {
490 ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
491 CFRelease (props_dict);
492 IOObjectRelease (disk);
495 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
499 if (child_disk_name_bsd[0] != 0)
500 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
501 else if (props_disk_name_bsd[0] != 0)
502 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
504 ERROR ("disk plugin: can't find bsd disk name.");
505 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
509 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
511 /* extract the stats */
512 read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
513 read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
514 read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
515 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
516 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
517 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
518 CFRelease (props_dict);
519 IOObjectRelease (disk);
522 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
523 if ((read_byt != -1LL) || (write_byt != -1LL))
524 disk_submit (disk_name, "disk_octets", read_byt, write_byt);
525 if ((read_ops != -1LL) || (write_ops != -1LL))
526 disk_submit (disk_name, "disk_ops", read_ops, write_ops);
527 if ((read_tme != -1LL) || (write_tme != -1LL))
528 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;
545 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
547 geom_stats_snapshot_free(snap);
549 /* Get a fresh copy of stats snapshot */
550 snap = geom_stats_snapshot_get();
552 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
556 /* Check if we have dirty read from this snapshot */
558 geom_stats_snapshot_reset(snap);
559 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
560 if (snap_iter->id == NULL)
562 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
564 /* New device? refresh GEOM tree */
565 if (geom_id == NULL) {
566 geom_deletetree(&geom_tree);
567 if (geom_gettree(&geom_tree) != 0) {
568 ERROR("disk plugin: geom_gettree() failed");
569 geom_stats_snapshot_free(snap);
572 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
575 * This should be rare: the device come right before we take the
576 * snapshot and went away right after it. We will handle this
577 * case later, so don't mark dirty but silently ignore it.
582 /* Only collect PROVIDER data */
583 if (geom_id->lg_what != ISPROVIDER)
586 /* Only collect data when rank is 1 (physical devices) */
587 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
590 /* Check if this is a dirty read quit for another try */
591 if (snap_iter->sequence0 != snap_iter->sequence1) {
599 geom_stats_snapshot_reset(snap);
601 snap_iter = geom_stats_snapshot_next(snap);
602 if (snap_iter == NULL)
605 if (snap_iter->id == NULL)
607 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
610 if (geom_id->lg_what != ISPROVIDER)
612 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
614 /* Skip dirty reads, if present */
615 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
618 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
620 if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
621 disk_submit(disk_name, "disk_octets",
622 (derive_t)snap_iter->bytes[DEVSTAT_READ],
623 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
626 if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
627 disk_submit(disk_name, "disk_ops",
628 (derive_t)snap_iter->operations[DEVSTAT_READ],
629 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
632 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
633 write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
634 if ((read_time != 0) || (write_time != 0)) {
635 disk_submit (disk_name, "disk_time",
636 (derive_t)(read_time*1000), (derive_t)(write_time*1000));
639 geom_stats_snapshot_free(snap);
651 derive_t read_sectors = 0;
652 derive_t write_sectors = 0;
654 derive_t read_ops = 0;
655 derive_t read_merged = 0;
656 derive_t read_time = 0;
657 derive_t write_ops = 0;
658 derive_t write_merged = 0;
659 derive_t write_time = 0;
660 gauge_t in_progress = NAN;
661 derive_t io_time = 0;
662 derive_t weighted_time = 0;
665 diskstats_t *ds, *pre_ds;
667 if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
669 fh = fopen ("/proc/partitions", "r");
672 ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
676 /* Kernel is 2.4.* */
681 handle_udev = udev_new();
684 while (fgets (buffer, sizeof (buffer), fh) != NULL)
689 numfields = strsplit (buffer, fields, 32);
691 if ((numfields != (14 + fieldshift)) && (numfields != 7))
694 minor = atoll (fields[1]);
696 disk_name = fields[2 + fieldshift];
698 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
699 if (strcmp (disk_name, ds->name) == 0)
704 if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
707 if ((ds->name = strdup (disk_name)) == NULL)
722 /* Kernel 2.6, Partition */
723 read_ops = atoll (fields[3]);
724 read_sectors = atoll (fields[4]);
725 write_ops = atoll (fields[5]);
726 write_sectors = atoll (fields[6]);
728 else if (numfields == (14 + fieldshift))
730 read_ops = atoll (fields[3 + fieldshift]);
731 write_ops = atoll (fields[7 + fieldshift]);
733 read_sectors = atoll (fields[5 + fieldshift]);
734 write_sectors = atoll (fields[9 + fieldshift]);
736 if ((fieldshift == 0) || (minor == 0))
739 read_merged = atoll (fields[4 + fieldshift]);
740 read_time = atoll (fields[6 + fieldshift]);
741 write_merged = atoll (fields[8 + fieldshift]);
742 write_time = atoll (fields[10+ fieldshift]);
744 in_progress = atof (fields[11 + fieldshift]);
746 io_time = atof (fields[12 + fieldshift]);
747 weighted_time = atof (fields[13 + fieldshift]);
752 DEBUG ("numfields = %i; => unknown file format.", numfields);
757 derive_t diff_read_sectors;
758 derive_t diff_write_sectors;
760 /* If the counter wraps around, it's only 32 bits.. */
761 if (read_sectors < ds->read_sectors)
762 diff_read_sectors = 1 + read_sectors
763 + (UINT_MAX - ds->read_sectors);
765 diff_read_sectors = read_sectors - ds->read_sectors;
766 if (write_sectors < ds->write_sectors)
767 diff_write_sectors = 1 + write_sectors
768 + (UINT_MAX - ds->write_sectors);
770 diff_write_sectors = write_sectors - ds->write_sectors;
772 ds->read_bytes += 512 * diff_read_sectors;
773 ds->write_bytes += 512 * diff_write_sectors;
774 ds->read_sectors = read_sectors;
775 ds->write_sectors = write_sectors;
778 /* Calculate the average time an io-op needs to complete */
781 derive_t diff_read_ops;
782 derive_t diff_write_ops;
783 derive_t diff_read_time;
784 derive_t diff_write_time;
786 if (read_ops < ds->read_ops)
787 diff_read_ops = 1 + read_ops
788 + (UINT_MAX - ds->read_ops);
790 diff_read_ops = read_ops - ds->read_ops;
791 DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
792 "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
794 read_ops, ds->read_ops, diff_read_ops);
796 if (write_ops < ds->write_ops)
797 diff_write_ops = 1 + write_ops
798 + (UINT_MAX - ds->write_ops);
800 diff_write_ops = write_ops - ds->write_ops;
802 if (read_time < ds->read_time)
803 diff_read_time = 1 + read_time
804 + (UINT_MAX - ds->read_time);
806 diff_read_time = read_time - ds->read_time;
808 if (write_time < ds->write_time)
809 diff_write_time = 1 + write_time
810 + (UINT_MAX - ds->write_time);
812 diff_write_time = write_time - ds->write_time;
814 if (diff_read_ops != 0)
815 ds->avg_read_time += disk_calc_time_incr (
816 diff_read_time, diff_read_ops);
817 if (diff_write_ops != 0)
818 ds->avg_write_time += disk_calc_time_incr (
819 diff_write_time, diff_write_ops);
821 ds->read_ops = read_ops;
822 ds->read_time = read_time;
823 ds->write_ops = write_ops;
824 ds->write_time = write_time;
826 if (read_merged || write_merged)
830 ds->has_in_progress = 1;
837 /* Don't write to the RRDs if we've just started.. */
839 if (ds->poll_count <= 2)
841 DEBUG ("disk plugin: (ds->poll_count = %i) <= "
842 "(min_poll_count = 2); => Not writing.",
847 if ((read_ops == 0) && (write_ops == 0))
849 DEBUG ("disk plugin: ((read_ops == 0) && "
850 "(write_ops == 0)); => Not writing.");
854 output_name = disk_name;
857 char *alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
858 if (alt_name != NULL)
859 output_name = alt_name;
862 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
863 disk_submit (output_name, "disk_octets",
864 ds->read_bytes, ds->write_bytes);
866 if ((ds->read_ops != 0) || (ds->write_ops != 0))
867 disk_submit (output_name, "disk_ops",
868 read_ops, write_ops);
870 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
871 disk_submit (output_name, "disk_time",
872 ds->avg_read_time, ds->avg_write_time);
877 disk_submit (output_name, "disk_merged",
878 read_merged, write_merged);
879 if (ds->has_in_progress)
880 submit_in_progress (output_name, in_progress);
882 submit_io_time (output_name, io_time, weighted_time);
886 /* release udev-based alternate name, if allocated */
889 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
892 udev_unref(handle_udev);
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 && HAVE_KSTAT_IO_T_WTIME
907 # define KIO_ROCTETS nread
908 # define KIO_WOCTETS nwritten
909 # define KIO_ROPS reads
910 # define KIO_WOPS writes
911 # define KIO_RTIME rtime
912 # define KIO_WTIME wtime
914 # error "kstat_io_t does not have the required members"
916 static kstat_io_t kio;
922 for (i = 0; i < numdisk; i++)
924 if (kstat_read (kc, ksp[i], &kio) == -1)
927 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
929 disk_submit (ksp[i]->ks_name, "disk_octets",
930 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
931 disk_submit (ksp[i]->ks_name, "disk_ops",
932 kio.KIO_ROPS, kio.KIO_WOPS);
933 /* FIXME: Convert this to microseconds if necessary */
934 disk_submit (ksp[i]->ks_name, "disk_time",
935 kio.KIO_RTIME, kio.KIO_WTIME);
937 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
939 disk_submit (ksp[i]->ks_name, "disk_octets",
940 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
941 disk_submit (ksp[i]->ks_name, "disk_ops",
942 kio.KIO_ROPS, kio.KIO_WOPS);
945 /* #endif defined(HAVE_LIBKSTAT) */
947 #elif defined(HAVE_LIBSTATGRAB)
948 sg_disk_io_stats *ds;
949 # if HAVE_LIBSTATGRAB_0_90
955 char name[DATA_MAX_NAME_LEN];
957 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
960 for (counter=0; counter < disks; counter++) {
961 strncpy(name, ds->disk_name, sizeof(name));
962 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
963 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
966 /* #endif defined(HAVE_LIBSTATGRAB) */
968 #elif defined(HAVE_PERFSTAT)
969 derive_t read_sectors;
970 derive_t write_sectors;
975 perfstat_id_t firstpath;
979 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
982 WARNING ("disk plugin: perfstat_disk: %s",
983 sstrerror (errno, errbuf, sizeof (errbuf)));
987 if (numdisk != pnumdisk || stat_disk==NULL) {
990 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
994 firstpath.name[0]='\0';
995 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
998 WARNING ("disk plugin: perfstat_disk : %s",
999 sstrerror (errno, errbuf, sizeof (errbuf)));
1003 for (i = 0; i < rnumdisk; i++)
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)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1015 write_time = stat_disk[i].wserv;
1016 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1017 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1019 #endif /* defined(HAVE_PERFSTAT) */
1022 } /* int disk_read */
1024 void module_register (void)
1026 plugin_register_config ("disk", disk_config,
1027 config_keys, config_keys_num);
1028 plugin_register_init ("disk", disk_init);
1029 plugin_register_read ("disk", disk_read);
1030 } /* void module_register */