1 /**
2 * collectd - src/disk.c
3 * Copyright (C) 2005-2012 Florian octo Forster
4 * Copyright (C) 2009 Manuel Sanmartin
5 *
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.
9 *
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.
14 *
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
18 *
19 * Authors:
20 * Florian octo Forster <octo at collectd.org>
21 * Manuel Sanmartin
22 **/
24 #include "collectd.h"
26 #include "common.h"
27 #include "plugin.h"
28 #include "utils_ignorelist.h"
30 #if HAVE_MACH_MACH_TYPES_H
31 # include <mach/mach_types.h>
32 #endif
33 #if HAVE_MACH_MACH_INIT_H
34 # include <mach/mach_init.h>
35 #endif
36 #if HAVE_MACH_MACH_ERROR_H
37 # include <mach/mach_error.h>
38 #endif
39 #if HAVE_MACH_MACH_PORT_H
40 # include <mach/mach_port.h>
41 #endif
42 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
43 # include <CoreFoundation/CoreFoundation.h>
44 #endif
45 #if HAVE_IOKIT_IOKITLIB_H
46 # include <IOKit/IOKitLib.h>
47 #endif
48 #if HAVE_IOKIT_IOTYPES_H
49 # include <IOKit/IOTypes.h>
50 #endif
51 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
52 # include <IOKit/storage/IOBlockStorageDriver.h>
53 #endif
54 #if HAVE_IOKIT_IOBSD_H
55 # include <IOKit/IOBSD.h>
56 #endif
57 #if KERNEL_FREEBSD
58 #include <devstat.h>
59 #include <libgeom.h>
60 #endif
62 #if HAVE_LIMITS_H
63 # include <limits.h>
64 #endif
65 #ifndef UINT_MAX
66 # define UINT_MAX 4294967295U
67 #endif
69 #if HAVE_STATGRAB_H
70 # include <statgrab.h>
71 #endif
73 #if HAVE_PERFSTAT
74 # ifndef _AIXVERSION_610
75 # include <sys/systemcfg.h>
76 # endif
77 # include <sys/protosw.h>
78 # include <libperfstat.h>
79 #endif
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
84 * major version. */
85 static _Bool use_bsd_name = 0;
86 /* #endif HAVE_IOKIT_IOKITLIB_H */
88 #elif KERNEL_LINUX
89 typedef struct diskstats
90 {
91 char *name;
93 /* This overflows in roughly 1361 years */
94 unsigned int poll_count;
96 derive_t read_sectors;
97 derive_t write_sectors;
99 derive_t read_bytes;
100 derive_t write_bytes;
102 derive_t read_ops;
103 derive_t write_ops;
104 derive_t read_time;
105 derive_t write_time;
107 derive_t avg_read_time;
108 derive_t avg_write_time;
110 _Bool has_merged;
111 _Bool has_in_progress;
112 _Bool has_io_time;
114 struct diskstats *next;
115 } diskstats_t;
117 static diskstats_t *disklist;
118 /* #endif KERNEL_LINUX */
119 #elif KERNEL_FREEBSD
120 static struct gmesh geom_tree;
121 /* #endif KERNEL_FREEBSD */
123 #elif HAVE_LIBKSTAT
124 #define MAX_NUMDISK 1024
125 extern kstat_ctl_t *kc;
126 static kstat_t *ksp[MAX_NUMDISK];
127 static int numdisk = 0;
128 /* #endif HAVE_LIBKSTAT */
130 #elif defined(HAVE_LIBSTATGRAB)
131 /* #endif HAVE_LIBSTATGRAB */
133 #elif HAVE_PERFSTAT
134 static perfstat_disk_t * stat_disk;
135 static int numdisk;
136 static int pnumdisk;
137 /* #endif HAVE_PERFSTAT */
139 #else
140 # error "No applicable input method."
141 #endif
143 #if HAVE_LIBUDEV
144 #include <libudev.h>
146 static char *conf_udev_name_attr = NULL;
147 static struct udev *handle_udev;
148 #endif
150 static const char *config_keys[] =
151 {
152 "Disk",
153 "UseBSDName",
154 "IgnoreSelected",
155 "UdevNameAttr"
156 };
157 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
159 static ignorelist_t *ignorelist = NULL;
161 static int disk_config (const char *key, const char *value)
162 {
163 if (ignorelist == NULL)
164 ignorelist = ignorelist_create (/* invert = */ 1);
165 if (ignorelist == NULL)
166 return (1);
168 if (strcasecmp ("Disk", key) == 0)
169 {
170 ignorelist_add (ignorelist, value);
171 }
172 else if (strcasecmp ("IgnoreSelected", key) == 0)
173 {
174 int invert = 1;
175 if (IS_TRUE (value))
176 invert = 0;
177 ignorelist_set_invert (ignorelist, invert);
178 }
179 else if (strcasecmp ("UseBSDName", key) == 0)
180 {
181 #if HAVE_IOKIT_IOKITLIB_H
182 use_bsd_name = IS_TRUE (value) ? 1 : 0;
183 #else
184 WARNING ("disk plugin: The \"UseBSDName\" option is only supported "
185 "on Mach / Mac OS X and will be ignored.");
186 #endif
187 }
188 else if (strcasecmp ("UdevNameAttr", key) == 0)
189 {
190 #if HAVE_LIBUDEV
191 if (conf_udev_name_attr != NULL)
192 {
193 free (conf_udev_name_attr);
194 conf_udev_name_attr = NULL;
195 }
196 if ((conf_udev_name_attr = strdup (value)) == NULL)
197 return (1);
198 #else
199 WARNING ("disk plugin: The \"UdevNameAttr\" option is only supported "
200 "if collectd is built with libudev support");
201 #endif
202 }
203 else
204 {
205 return (-1);
206 }
208 return (0);
209 } /* int disk_config */
211 static int disk_init (void)
212 {
213 #if HAVE_IOKIT_IOKITLIB_H
214 kern_return_t status;
216 if (io_master_port != MACH_PORT_NULL)
217 {
218 mach_port_deallocate (mach_task_self (),
219 io_master_port);
220 io_master_port = MACH_PORT_NULL;
221 }
223 status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
224 if (status != kIOReturnSuccess)
225 {
226 ERROR ("IOMasterPort failed: %s",
227 mach_error_string (status));
228 io_master_port = MACH_PORT_NULL;
229 return (-1);
230 }
231 /* #endif HAVE_IOKIT_IOKITLIB_H */
233 #elif KERNEL_LINUX
234 #if HAVE_LIBUDEV
235 if (conf_udev_name_attr != NULL)
236 {
237 handle_udev = udev_new();
238 if (handle_udev == NULL) {
239 ERROR ("disk plugin: udev_new() failed!");
240 return (-1);
241 }
242 }
243 #endif /* HAVE_LIBUDEV */
244 /* #endif KERNEL_LINUX */
246 #elif KERNEL_FREEBSD
247 int rv;
249 rv = geom_gettree(&geom_tree);
250 if (rv != 0) {
251 ERROR ("geom_gettree() failed, returned %d", rv);
252 return (-1);
253 }
254 rv = geom_stats_open();
255 if (rv != 0) {
256 ERROR ("geom_stats_open() failed, returned %d", rv);
257 return (-1);
258 }
259 /* #endif KERNEL_FREEBSD */
261 #elif HAVE_LIBKSTAT
262 kstat_t *ksp_chain;
264 numdisk = 0;
266 if (kc == NULL)
267 return (-1);
269 for (numdisk = 0, ksp_chain = kc->kc_chain;
270 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
271 ksp_chain = ksp_chain->ks_next)
272 {
273 if (strncmp (ksp_chain->ks_class, "disk", 4)
274 && strncmp (ksp_chain->ks_class, "partition", 9))
275 continue;
276 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
277 continue;
278 ksp[numdisk++] = ksp_chain;
279 }
280 #endif /* HAVE_LIBKSTAT */
282 return (0);
283 } /* int disk_init */
285 static int disk_shutdown (void)
286 {
287 #if KERNEL_LINUX
288 #if HAVE_LIBUDEV
289 if (handle_udev != NULL)
290 udev_unref(handle_udev);
291 #endif /* HAVE_LIBUDEV */
292 #endif /* KERNEL_LINUX */
293 return (0);
294 } /* int disk_shutdown */
296 static void disk_submit (const char *plugin_instance,
297 const char *type,
298 derive_t read, derive_t write)
299 {
300 value_t values[2];
301 value_list_t vl = VALUE_LIST_INIT;
303 values[0].derive = read;
304 values[1].derive = write;
306 vl.values = values;
307 vl.values_len = 2;
308 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
309 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
310 sstrncpy (vl.plugin_instance, plugin_instance,
311 sizeof (vl.plugin_instance));
312 sstrncpy (vl.type, type, sizeof (vl.type));
314 plugin_dispatch_values (&vl);
315 } /* void disk_submit */
317 #if KERNEL_FREEBSD || KERNEL_LINUX
318 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
319 {
320 value_t values[2];
321 value_list_t vl = VALUE_LIST_INIT;
323 values[0].derive = io_time;
324 values[1].derive = weighted_time;
326 vl.values = values;
327 vl.values_len = 2;
328 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
329 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
330 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
331 sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
333 plugin_dispatch_values (&vl);
334 } /* void submit_io_time */
335 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
337 #if KERNEL_LINUX
338 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
339 {
340 value_t v;
341 value_list_t vl = VALUE_LIST_INIT;
343 v.gauge = in_progress;
345 vl.values = &v;
346 vl.values_len = 1;
347 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
348 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
349 sstrncpy (vl.plugin_instance, disk_name, sizeof (vl.plugin_instance));
350 sstrncpy (vl.type, "pending_operations", sizeof (vl.type));
352 plugin_dispatch_values (&vl);
353 }
356 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
357 {
358 double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
359 double avg_time = ((double) delta_time) / ((double) delta_ops);
360 double avg_time_incr = interval * avg_time;
362 return ((counter_t) (avg_time_incr + .5));
363 }
364 #endif
366 #if HAVE_LIBUDEV
367 /**
368 * Attempt to provide an rename disk instance from an assigned udev attribute.
369 *
370 * On success, it returns a strduped char* to the desired attribute value.
371 * Otherwise it returns NULL.
372 */
374 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
375 {
376 struct udev_device *dev;
377 const char *prop;
378 char *output = NULL;
380 dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
381 if (dev != NULL)
382 {
383 prop = udev_device_get_property_value (dev, attr);
384 if (prop) {
385 output = strdup (prop);
386 DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
387 }
388 udev_device_unref (dev);
389 }
390 return output;
391 }
392 #endif
394 #if HAVE_IOKIT_IOKITLIB_H
395 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
396 {
397 signed long long val_int;
398 CFNumberRef val_obj;
399 CFStringRef key_obj;
401 /* `key_obj' needs to be released. */
402 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
403 kCFStringEncodingASCII);
404 if (key_obj == NULL)
405 {
406 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
407 return (-1LL);
408 }
410 /* get => we don't need to release (== free) the object */
411 val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
413 CFRelease (key_obj);
415 if (val_obj == NULL)
416 {
417 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
418 return (-1LL);
419 }
421 if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
422 {
423 DEBUG ("CFNumberGetValue (%s) failed.", key);
424 return (-1LL);
425 }
427 return (val_int);
428 }
429 #endif /* HAVE_IOKIT_IOKITLIB_H */
431 static int disk_read (void)
432 {
433 #if HAVE_IOKIT_IOKITLIB_H
434 io_registry_entry_t disk;
435 io_registry_entry_t disk_child;
436 io_iterator_t disk_list;
437 CFMutableDictionaryRef props_dict, child_dict;
438 CFDictionaryRef stats_dict;
439 CFStringRef tmp_cf_string_ref;
440 kern_return_t status;
442 signed long long read_ops, read_byt, read_tme;
443 signed long long write_ops, write_byt, write_tme;
445 int disk_major, disk_minor;
446 char disk_name[DATA_MAX_NAME_LEN];
447 char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
449 /* Get the list of all disk objects. */
450 if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
451 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
452 return (-1);
453 }
455 while ((disk = IOIteratorNext (disk_list)) != 0) {
456 props_dict = NULL;
457 stats_dict = NULL;
458 child_dict = NULL;
460 /* get child of disk entry and corresponding property dictionary */
461 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
462 /* This fails for example for DVD/CD drives, which we want to ignore anyway */
463 DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
464 IOObjectRelease (disk);
465 continue;
466 }
467 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
468 ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
469 IOObjectRelease (disk_child);
470 IOObjectRelease (disk);
471 continue;
472 }
474 /* extract name and major/minor numbers */
475 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
476 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
477 if (tmp_cf_string_ref) {
478 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
479 CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
480 }
481 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
482 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
483 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
484 CFRelease (child_dict);
485 IOObjectRelease (disk_child);
487 /* get property dictionary of the disk entry itself */
488 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
489 ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
490 IOObjectRelease (disk);
491 continue;
492 }
494 /* extract name and stats dictionary */
495 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
496 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
497 if (tmp_cf_string_ref) {
498 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
499 CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
500 }
501 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
502 if (stats_dict == NULL) {
503 ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
504 CFRelease (props_dict);
505 IOObjectRelease (disk);
506 continue;
507 }
508 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
510 /* choose name */
511 if (use_bsd_name) {
512 if (child_disk_name_bsd[0] != 0)
513 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
514 else if (props_disk_name_bsd[0] != 0)
515 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
516 else {
517 ERROR ("disk plugin: can't find bsd disk name.");
518 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
519 }
520 }
521 else
522 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
524 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
526 /* check the name against ignore list */
527 if (ignorelist_match (ignorelist, disk_name) != 0) {
528 CFRelease (props_dict);
529 IOObjectRelease (disk);
530 continue;
531 }
533 /* extract the stats */
534 read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
535 read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
536 read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
537 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
538 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
539 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
540 CFRelease (props_dict);
541 IOObjectRelease (disk);
543 /* and submit */
544 if ((read_byt != -1LL) || (write_byt != -1LL))
545 disk_submit (disk_name, "disk_octets", read_byt, write_byt);
546 if ((read_ops != -1LL) || (write_ops != -1LL))
547 disk_submit (disk_name, "disk_ops", read_ops, write_ops);
548 if ((read_tme != -1LL) || (write_tme != -1LL))
549 disk_submit (disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
551 }
552 IOObjectRelease (disk_list);
553 /* #endif HAVE_IOKIT_IOKITLIB_H */
555 #elif KERNEL_FREEBSD
556 int retry, dirty;
558 void *snap = NULL;
559 struct devstat *snap_iter;
561 struct gident *geom_id;
563 const char *disk_name;
564 long double read_time, write_time, busy_time, total_duration;
566 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
567 if (snap != NULL)
568 geom_stats_snapshot_free(snap);
570 /* Get a fresh copy of stats snapshot */
571 snap = geom_stats_snapshot_get();
572 if (snap == NULL) {
573 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
574 return (-1);
575 }
577 /* Check if we have dirty read from this snapshot */
578 dirty = 0;
579 geom_stats_snapshot_reset(snap);
580 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
581 if (snap_iter->id == NULL)
582 continue;
583 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
585 /* New device? refresh GEOM tree */
586 if (geom_id == NULL) {
587 geom_deletetree(&geom_tree);
588 if (geom_gettree(&geom_tree) != 0) {
589 ERROR("disk plugin: geom_gettree() failed");
590 geom_stats_snapshot_free(snap);
591 return (-1);
592 }
593 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
594 }
595 /*
596 * This should be rare: the device come right before we take the
597 * snapshot and went away right after it. We will handle this
598 * case later, so don't mark dirty but silently ignore it.
599 */
600 if (geom_id == NULL)
601 continue;
603 /* Only collect PROVIDER data */
604 if (geom_id->lg_what != ISPROVIDER)
605 continue;
607 /* Only collect data when rank is 1 (physical devices) */
608 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
609 continue;
611 /* Check if this is a dirty read quit for another try */
612 if (snap_iter->sequence0 != snap_iter->sequence1) {
613 dirty = 1;
614 break;
615 }
616 }
617 }
619 /* Reset iterator */
620 geom_stats_snapshot_reset(snap);
621 for (;;) {
622 snap_iter = geom_stats_snapshot_next(snap);
623 if (snap_iter == NULL)
624 break;
626 if (snap_iter->id == NULL)
627 continue;
628 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
629 if (geom_id == NULL)
630 continue;
631 if (geom_id->lg_what != ISPROVIDER)
632 continue;
633 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
634 continue;
635 /* Skip dirty reads, if present */
636 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
637 continue;
639 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
641 if (ignorelist_match (ignorelist, disk_name) != 0)
642 continue;
644 if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
645 disk_submit(disk_name, "disk_octets",
646 (derive_t)snap_iter->bytes[DEVSTAT_READ],
647 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
648 }
650 if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
651 disk_submit(disk_name, "disk_ops",
652 (derive_t)snap_iter->operations[DEVSTAT_READ],
653 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
654 }
656 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
657 write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
658 if ((read_time != 0) || (write_time != 0)) {
659 disk_submit (disk_name, "disk_time",
660 (derive_t)(read_time*1000), (derive_t)(write_time*1000));
661 }
662 if (devstat_compute_statistics(snap_iter, NULL, 1.0,
663 DSM_TOTAL_BUSY_TIME, &busy_time,
664 DSM_TOTAL_DURATION, &total_duration,
665 DSM_NONE) != 0) {
666 WARNING("%s", devstat_errbuf);
667 }
668 else
669 {
670 submit_io_time(disk_name, busy_time, total_duration);
671 }
672 }
673 geom_stats_snapshot_free(snap);
675 #elif KERNEL_LINUX
676 FILE *fh;
677 char buffer[1024];
679 char *fields[32];
680 int numfields;
681 int fieldshift = 0;
683 int minor = 0;
685 derive_t read_sectors = 0;
686 derive_t write_sectors = 0;
688 derive_t read_ops = 0;
689 derive_t read_merged = 0;
690 derive_t read_time = 0;
691 derive_t write_ops = 0;
692 derive_t write_merged = 0;
693 derive_t write_time = 0;
694 gauge_t in_progress = NAN;
695 derive_t io_time = 0;
696 derive_t weighted_time = 0;
697 int is_disk = 0;
699 diskstats_t *ds, *pre_ds;
701 if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
702 {
703 fh = fopen ("/proc/partitions", "r");
704 if (fh == NULL)
705 {
706 ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
707 return (-1);
708 }
710 /* Kernel is 2.4.* */
711 fieldshift = 1;
712 }
714 while (fgets (buffer, sizeof (buffer), fh) != NULL)
715 {
716 char *disk_name;
717 char *output_name;
719 numfields = strsplit (buffer, fields, 32);
721 if ((numfields != (14 + fieldshift)) && (numfields != 7))
722 continue;
724 minor = atoll (fields[1]);
726 disk_name = fields[2 + fieldshift];
728 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
729 if (strcmp (disk_name, ds->name) == 0)
730 break;
732 if (ds == NULL)
733 {
734 if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
735 continue;
737 if ((ds->name = strdup (disk_name)) == NULL)
738 {
739 free (ds);
740 continue;
741 }
743 if (pre_ds == NULL)
744 disklist = ds;
745 else
746 pre_ds->next = ds;
747 }
749 is_disk = 0;
750 if (numfields == 7)
751 {
752 /* Kernel 2.6, Partition */
753 read_ops = atoll (fields[3]);
754 read_sectors = atoll (fields[4]);
755 write_ops = atoll (fields[5]);
756 write_sectors = atoll (fields[6]);
757 }
758 else if (numfields == (14 + fieldshift))
759 {
760 read_ops = atoll (fields[3 + fieldshift]);
761 write_ops = atoll (fields[7 + fieldshift]);
763 read_sectors = atoll (fields[5 + fieldshift]);
764 write_sectors = atoll (fields[9 + fieldshift]);
766 if ((fieldshift == 0) || (minor == 0))
767 {
768 is_disk = 1;
769 read_merged = atoll (fields[4 + fieldshift]);
770 read_time = atoll (fields[6 + fieldshift]);
771 write_merged = atoll (fields[8 + fieldshift]);
772 write_time = atoll (fields[10+ fieldshift]);
774 in_progress = atof (fields[11 + fieldshift]);
776 io_time = atof (fields[12 + fieldshift]);
777 weighted_time = atof (fields[13 + fieldshift]);
778 }
779 }
780 else
781 {
782 DEBUG ("numfields = %i; => unknown file format.", numfields);
783 continue;
784 }
786 {
787 derive_t diff_read_sectors;
788 derive_t diff_write_sectors;
790 /* If the counter wraps around, it's only 32 bits.. */
791 if (read_sectors < ds->read_sectors)
792 diff_read_sectors = 1 + read_sectors
793 + (UINT_MAX - ds->read_sectors);
794 else
795 diff_read_sectors = read_sectors - ds->read_sectors;
796 if (write_sectors < ds->write_sectors)
797 diff_write_sectors = 1 + write_sectors
798 + (UINT_MAX - ds->write_sectors);
799 else
800 diff_write_sectors = write_sectors - ds->write_sectors;
802 ds->read_bytes += 512 * diff_read_sectors;
803 ds->write_bytes += 512 * diff_write_sectors;
804 ds->read_sectors = read_sectors;
805 ds->write_sectors = write_sectors;
806 }
808 /* Calculate the average time an io-op needs to complete */
809 if (is_disk)
810 {
811 derive_t diff_read_ops;
812 derive_t diff_write_ops;
813 derive_t diff_read_time;
814 derive_t diff_write_time;
816 if (read_ops < ds->read_ops)
817 diff_read_ops = 1 + read_ops
818 + (UINT_MAX - ds->read_ops);
819 else
820 diff_read_ops = read_ops - ds->read_ops;
821 DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
822 "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
823 disk_name,
824 read_ops, ds->read_ops, diff_read_ops);
826 if (write_ops < ds->write_ops)
827 diff_write_ops = 1 + write_ops
828 + (UINT_MAX - ds->write_ops);
829 else
830 diff_write_ops = write_ops - ds->write_ops;
832 if (read_time < ds->read_time)
833 diff_read_time = 1 + read_time
834 + (UINT_MAX - ds->read_time);
835 else
836 diff_read_time = read_time - ds->read_time;
838 if (write_time < ds->write_time)
839 diff_write_time = 1 + write_time
840 + (UINT_MAX - ds->write_time);
841 else
842 diff_write_time = write_time - ds->write_time;
844 if (diff_read_ops != 0)
845 ds->avg_read_time += disk_calc_time_incr (
846 diff_read_time, diff_read_ops);
847 if (diff_write_ops != 0)
848 ds->avg_write_time += disk_calc_time_incr (
849 diff_write_time, diff_write_ops);
851 ds->read_ops = read_ops;
852 ds->read_time = read_time;
853 ds->write_ops = write_ops;
854 ds->write_time = write_time;
856 if (read_merged || write_merged)
857 ds->has_merged = 1;
859 if (in_progress)
860 ds->has_in_progress = 1;
862 if (io_time)
863 ds->has_io_time = 1;
865 } /* if (is_disk) */
867 /* Don't write to the RRDs if we've just started.. */
868 ds->poll_count++;
869 if (ds->poll_count <= 2)
870 {
871 DEBUG ("disk plugin: (ds->poll_count = %i) <= "
872 "(min_poll_count = 2); => Not writing.",
873 ds->poll_count);
874 continue;
875 }
877 if ((read_ops == 0) && (write_ops == 0))
878 {
879 DEBUG ("disk plugin: ((read_ops == 0) && "
880 "(write_ops == 0)); => Not writing.");
881 continue;
882 }
884 output_name = disk_name;
886 #if HAVE_LIBUDEV
887 char *alt_name = NULL;
888 if (conf_udev_name_attr != NULL)
889 {
890 alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
891 if (alt_name != NULL)
892 output_name = alt_name;
893 }
894 #endif
896 if (ignorelist_match (ignorelist, output_name) != 0)
897 {
898 #if HAVE_LIBUDEV
899 /* release udev-based alternate name, if allocated */
900 sfree (alt_name);
901 #endif
902 continue;
903 }
905 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
906 disk_submit (output_name, "disk_octets",
907 ds->read_bytes, ds->write_bytes);
909 if ((ds->read_ops != 0) || (ds->write_ops != 0))
910 disk_submit (output_name, "disk_ops",
911 read_ops, write_ops);
913 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
914 disk_submit (output_name, "disk_time",
915 ds->avg_read_time, ds->avg_write_time);
917 if (is_disk)
918 {
919 if (ds->has_merged)
920 disk_submit (output_name, "disk_merged",
921 read_merged, write_merged);
922 if (ds->has_in_progress)
923 submit_in_progress (output_name, in_progress);
924 if (ds->has_io_time)
925 submit_io_time (output_name, io_time, weighted_time);
926 } /* if (is_disk) */
928 #if HAVE_LIBUDEV
929 /* release udev-based alternate name, if allocated */
930 sfree (alt_name);
931 #endif
932 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
935 fclose (fh);
936 /* #endif defined(KERNEL_LINUX) */
938 #elif HAVE_LIBKSTAT
939 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
940 # define KIO_ROCTETS reads
941 # define KIO_WOCTETS writes
942 # define KIO_ROPS nreads
943 # define KIO_WOPS nwrites
944 # define KIO_RTIME rtime
945 # define KIO_WTIME wtime
946 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
947 # define KIO_ROCTETS nread
948 # define KIO_WOCTETS nwritten
949 # define KIO_ROPS reads
950 # define KIO_WOPS writes
951 # define KIO_RTIME rtime
952 # define KIO_WTIME wtime
953 # else
954 # error "kstat_io_t does not have the required members"
955 # endif
956 static kstat_io_t kio;
958 if (kc == NULL)
959 return (-1);
961 for (int i = 0; i < numdisk; i++)
962 {
963 if (kstat_read (kc, ksp[i], &kio) == -1)
964 continue;
966 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
967 {
968 if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
969 continue;
971 disk_submit (ksp[i]->ks_name, "disk_octets",
972 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
973 disk_submit (ksp[i]->ks_name, "disk_ops",
974 kio.KIO_ROPS, kio.KIO_WOPS);
975 /* FIXME: Convert this to microseconds if necessary */
976 disk_submit (ksp[i]->ks_name, "disk_time",
977 kio.KIO_RTIME, kio.KIO_WTIME);
978 }
979 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
980 {
981 if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
982 continue;
984 disk_submit (ksp[i]->ks_name, "disk_octets",
985 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
986 disk_submit (ksp[i]->ks_name, "disk_ops",
987 kio.KIO_ROPS, kio.KIO_WOPS);
988 }
989 }
990 /* #endif defined(HAVE_LIBKSTAT) */
992 #elif defined(HAVE_LIBSTATGRAB)
993 sg_disk_io_stats *ds;
994 # if HAVE_LIBSTATGRAB_0_90
995 size_t disks;
996 # else
997 int disks;
998 #endif
999 char name[DATA_MAX_NAME_LEN];
1001 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
1002 return (0);
1004 for (int counter = 0; counter < disks; counter++) {
1005 strncpy(name, ds->disk_name, sizeof(name));
1006 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
1008 if (ignorelist_match (ignorelist, name) != 0) {
1009 ds++;
1010 continue;
1011 }
1013 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
1014 ds++;
1015 }
1016 /* #endif defined(HAVE_LIBSTATGRAB) */
1018 #elif defined(HAVE_PERFSTAT)
1019 derive_t read_sectors;
1020 derive_t write_sectors;
1021 derive_t read_time;
1022 derive_t write_time;
1023 derive_t read_ops;
1024 derive_t write_ops;
1025 perfstat_id_t firstpath;
1026 int rnumdisk;
1028 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
1029 {
1030 char errbuf[1024];
1031 WARNING ("disk plugin: perfstat_disk: %s",
1032 sstrerror (errno, errbuf, sizeof (errbuf)));
1033 return (-1);
1034 }
1036 if (numdisk != pnumdisk || stat_disk==NULL) {
1037 if (stat_disk!=NULL)
1038 free(stat_disk);
1039 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
1040 }
1041 pnumdisk = numdisk;
1043 firstpath.name[0]='\0';
1044 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
1045 {
1046 char errbuf[1024];
1047 WARNING ("disk plugin: perfstat_disk : %s",
1048 sstrerror (errno, errbuf, sizeof (errbuf)));
1049 return (-1);
1050 }
1052 for (int i = 0; i < rnumdisk; i++)
1053 {
1054 if (ignorelist_match (ignorelist, stat_disk[i].name) != 0)
1055 continue;
1057 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
1058 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
1059 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1061 read_ops = stat_disk[i].xrate;
1062 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1063 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
1065 read_time = stat_disk[i].rserv;
1066 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1067 write_time = stat_disk[i].wserv;
1068 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1069 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1070 }
1071 #endif /* defined(HAVE_PERFSTAT) */
1073 return (0);
1074 } /* int disk_read */
1076 void module_register (void)
1077 {
1078 plugin_register_config ("disk", disk_config,
1079 config_keys, config_keys_num);
1080 plugin_register_init ("disk", disk_init);
1081 plugin_register_shutdown ("disk", disk_shutdown);
1082 plugin_register_read ("disk", disk_read);
1083 } /* void module_register */