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"
25 #include "common.h"
26 #include "plugin.h"
27 #include "utils_ignorelist.h"
29 #if HAVE_MACH_MACH_TYPES_H
30 # include <mach/mach_types.h>
31 #endif
32 #if HAVE_MACH_MACH_INIT_H
33 # include <mach/mach_init.h>
34 #endif
35 #if HAVE_MACH_MACH_ERROR_H
36 # include <mach/mach_error.h>
37 #endif
38 #if HAVE_MACH_MACH_PORT_H
39 # include <mach/mach_port.h>
40 #endif
41 #if HAVE_COREFOUNDATION_COREFOUNDATION_H
42 # include <CoreFoundation/CoreFoundation.h>
43 #endif
44 #if HAVE_IOKIT_IOKITLIB_H
45 # include <IOKit/IOKitLib.h>
46 #endif
47 #if HAVE_IOKIT_IOTYPES_H
48 # include <IOKit/IOTypes.h>
49 #endif
50 #if HAVE_IOKIT_STORAGE_IOBLOCKSTORAGEDRIVER_H
51 # include <IOKit/storage/IOBlockStorageDriver.h>
52 #endif
53 #if HAVE_IOKIT_IOBSD_H
54 # include <IOKit/IOBSD.h>
55 #endif
56 #if KERNEL_FREEBSD
57 #include <devstat.h>
58 #include <libgeom.h>
59 #endif
61 #if HAVE_LIMITS_H
62 # include <limits.h>
63 #endif
64 #ifndef UINT_MAX
65 # define UINT_MAX 4294967295U
66 #endif
68 #if HAVE_STATGRAB_H
69 # include <statgrab.h>
70 #endif
72 #if HAVE_PERFSTAT
73 # ifndef _AIXVERSION_610
74 # include <sys/systemcfg.h>
75 # endif
76 # include <sys/protosw.h>
77 # include <libperfstat.h>
78 #endif
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
83 * major version. */
84 static _Bool use_bsd_name = 0;
85 /* #endif HAVE_IOKIT_IOKITLIB_H */
87 #elif KERNEL_LINUX
88 typedef struct diskstats
89 {
90 char *name;
92 /* This overflows in roughly 1361 years */
93 unsigned int poll_count;
95 derive_t read_sectors;
96 derive_t write_sectors;
98 derive_t read_bytes;
99 derive_t write_bytes;
101 derive_t read_ops;
102 derive_t write_ops;
103 derive_t read_time;
104 derive_t write_time;
106 derive_t avg_read_time;
107 derive_t avg_write_time;
109 _Bool has_merged;
110 _Bool has_in_progress;
111 _Bool has_io_time;
113 struct diskstats *next;
114 } diskstats_t;
116 static diskstats_t *disklist;
117 /* #endif KERNEL_LINUX */
118 #elif KERNEL_FREEBSD
119 static struct gmesh geom_tree;
120 /* #endif KERNEL_FREEBSD */
122 #elif HAVE_LIBKSTAT
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 */
132 #elif HAVE_PERFSTAT
133 static perfstat_disk_t * stat_disk;
134 static int numdisk;
135 static int pnumdisk;
136 /* #endif HAVE_PERFSTAT */
138 #else
139 # error "No applicable input method."
140 #endif
142 #if HAVE_LIBUDEV
143 #include <libudev.h>
145 static char *conf_udev_name_attr = NULL;
146 static struct udev *handle_udev;
147 #endif
149 static const char *config_keys[] =
150 {
151 "Disk",
152 "UseBSDName",
153 "IgnoreSelected",
154 "UdevNameAttr"
155 };
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)
161 {
162 if (ignorelist == NULL)
163 ignorelist = ignorelist_create (/* invert = */ 1);
164 if (ignorelist == NULL)
165 return (1);
167 if (strcasecmp ("Disk", key) == 0)
168 {
169 ignorelist_add (ignorelist, value);
170 }
171 else if (strcasecmp ("IgnoreSelected", key) == 0)
172 {
173 int invert = 1;
174 if (IS_TRUE (value))
175 invert = 0;
176 ignorelist_set_invert (ignorelist, invert);
177 }
178 else if (strcasecmp ("UseBSDName", key) == 0)
179 {
180 #if HAVE_IOKIT_IOKITLIB_H
181 use_bsd_name = IS_TRUE (value) ? 1 : 0;
182 #else
183 WARNING ("disk plugin: The \"UseBSDName\" option is only supported "
184 "on Mach / Mac OS X and will be ignored.");
185 #endif
186 }
187 else if (strcasecmp ("UdevNameAttr", key) == 0)
188 {
189 #if HAVE_LIBUDEV
190 if (conf_udev_name_attr != NULL)
191 {
192 free (conf_udev_name_attr);
193 conf_udev_name_attr = NULL;
194 }
195 if ((conf_udev_name_attr = strdup (value)) == NULL)
196 return (1);
197 #else
198 WARNING ("disk plugin: The \"UdevNameAttr\" option is only supported "
199 "if collectd is built with libudev support");
200 #endif
201 }
202 else
203 {
204 return (-1);
205 }
207 return (0);
208 } /* int disk_config */
210 static int disk_init (void)
211 {
212 #if HAVE_IOKIT_IOKITLIB_H
213 kern_return_t status;
215 if (io_master_port != MACH_PORT_NULL)
216 {
217 mach_port_deallocate (mach_task_self (),
218 io_master_port);
219 io_master_port = MACH_PORT_NULL;
220 }
222 status = IOMasterPort (MACH_PORT_NULL, &io_master_port);
223 if (status != kIOReturnSuccess)
224 {
225 ERROR ("IOMasterPort failed: %s",
226 mach_error_string (status));
227 io_master_port = MACH_PORT_NULL;
228 return (-1);
229 }
230 /* #endif HAVE_IOKIT_IOKITLIB_H */
232 #elif KERNEL_LINUX
233 /* do nothing */
234 /* #endif KERNEL_LINUX */
236 #elif KERNEL_FREEBSD
237 int rv;
239 rv = geom_gettree(&geom_tree);
240 if (rv != 0) {
241 ERROR ("geom_gettree() failed, returned %d", rv);
242 return (-1);
243 }
244 rv = geom_stats_open();
245 if (rv != 0) {
246 ERROR ("geom_stats_open() failed, returned %d", rv);
247 return (-1);
248 }
249 /* #endif KERNEL_FREEBSD */
251 #elif HAVE_LIBKSTAT
252 kstat_t *ksp_chain;
254 numdisk = 0;
256 if (kc == NULL)
257 return (-1);
259 for (numdisk = 0, ksp_chain = kc->kc_chain;
260 (numdisk < MAX_NUMDISK) && (ksp_chain != NULL);
261 ksp_chain = ksp_chain->ks_next)
262 {
263 if (strncmp (ksp_chain->ks_class, "disk", 4)
264 && strncmp (ksp_chain->ks_class, "partition", 9))
265 continue;
266 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
267 continue;
268 ksp[numdisk++] = ksp_chain;
269 }
270 #endif /* HAVE_LIBKSTAT */
272 return (0);
273 } /* int disk_init */
275 static void disk_submit (const char *plugin_instance,
276 const char *type,
277 derive_t read, derive_t write)
278 {
279 value_t values[2];
280 value_list_t vl = VALUE_LIST_INIT;
282 values[0].derive = read;
283 values[1].derive = write;
285 vl.values = values;
286 vl.values_len = 2;
287 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
288 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
289 sstrncpy (vl.plugin_instance, plugin_instance,
290 sizeof (vl.plugin_instance));
291 sstrncpy (vl.type, type, sizeof (vl.type));
293 plugin_dispatch_values (&vl);
294 } /* void disk_submit */
296 #if KERNEL_FREEBSD || KERNEL_LINUX
297 static void submit_io_time (char const *plugin_instance, derive_t io_time, derive_t weighted_time)
298 {
299 value_t values[2];
300 value_list_t vl = VALUE_LIST_INIT;
302 values[0].derive = io_time;
303 values[1].derive = weighted_time;
305 vl.values = values;
306 vl.values_len = 2;
307 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
308 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
309 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
310 sstrncpy (vl.type, "disk_io_time", sizeof (vl.type));
312 plugin_dispatch_values (&vl);
313 } /* void submit_io_time */
314 #endif /* KERNEL_FREEBSD || KERNEL_LINUX */
316 #if KERNEL_LINUX
317 static void submit_in_progress (char const *disk_name, gauge_t in_progress)
318 {
319 value_t v;
320 value_list_t vl = VALUE_LIST_INIT;
322 v.gauge = in_progress;
324 vl.values = &v;
325 vl.values_len = 1;
326 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
327 sstrncpy (vl.plugin, "disk", sizeof (vl.plugin));
328 sstrncpy (vl.plugin_instance, disk_name, sizeof (vl.plugin_instance));
329 sstrncpy (vl.type, "pending_operations", sizeof (vl.type));
331 plugin_dispatch_values (&vl);
332 }
335 static counter_t disk_calc_time_incr (counter_t delta_time, counter_t delta_ops)
336 {
337 double interval = CDTIME_T_TO_DOUBLE (plugin_get_interval ());
338 double avg_time = ((double) delta_time) / ((double) delta_ops);
339 double avg_time_incr = interval * avg_time;
341 return ((counter_t) (avg_time_incr + .5));
342 }
343 #endif
345 #if HAVE_LIBUDEV
346 /**
347 * Attempt to provide an rename disk instance from an assigned udev attribute.
348 *
349 * On success, it returns a strduped char* to the desired attribute value.
350 * Otherwise it returns NULL.
351 */
353 static char *disk_udev_attr_name (struct udev *udev, char *disk_name, const char *attr)
354 {
355 struct udev_device *dev;
356 const char *prop;
357 char *output = NULL;
359 dev = udev_device_new_from_subsystem_sysname (udev, "block", disk_name);
360 if (dev != NULL)
361 {
362 prop = udev_device_get_property_value (dev, attr);
363 if (prop) {
364 output = strdup (prop);
365 DEBUG ("disk plugin: renaming %s => %s", disk_name, output);
366 }
367 udev_device_unref (dev);
368 }
369 return output;
370 }
371 #endif
373 #if HAVE_IOKIT_IOKITLIB_H
374 static signed long long dict_get_value (CFDictionaryRef dict, const char *key)
375 {
376 signed long long val_int;
377 CFNumberRef val_obj;
378 CFStringRef key_obj;
380 /* `key_obj' needs to be released. */
381 key_obj = CFStringCreateWithCString (kCFAllocatorDefault, key,
382 kCFStringEncodingASCII);
383 if (key_obj == NULL)
384 {
385 DEBUG ("CFStringCreateWithCString (%s) failed.", key);
386 return (-1LL);
387 }
389 /* get => we don't need to release (== free) the object */
390 val_obj = (CFNumberRef) CFDictionaryGetValue (dict, key_obj);
392 CFRelease (key_obj);
394 if (val_obj == NULL)
395 {
396 DEBUG ("CFDictionaryGetValue (%s) failed.", key);
397 return (-1LL);
398 }
400 if (!CFNumberGetValue (val_obj, kCFNumberSInt64Type, &val_int))
401 {
402 DEBUG ("CFNumberGetValue (%s) failed.", key);
403 return (-1LL);
404 }
406 return (val_int);
407 }
408 #endif /* HAVE_IOKIT_IOKITLIB_H */
410 static int disk_read (void)
411 {
412 #if HAVE_IOKIT_IOKITLIB_H
413 io_registry_entry_t disk;
414 io_registry_entry_t disk_child;
415 io_iterator_t disk_list;
416 CFMutableDictionaryRef props_dict, child_dict;
417 CFDictionaryRef stats_dict;
418 CFStringRef tmp_cf_string_ref;
419 kern_return_t status;
421 signed long long read_ops, read_byt, read_tme;
422 signed long long write_ops, write_byt, write_tme;
424 int disk_major, disk_minor;
425 char disk_name[DATA_MAX_NAME_LEN];
426 char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
428 /* Get the list of all disk objects. */
429 if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
430 ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
431 return (-1);
432 }
434 while ((disk = IOIteratorNext (disk_list)) != 0) {
435 props_dict = NULL;
436 stats_dict = NULL;
437 child_dict = NULL;
439 /* get child of disk entry and corresponding property dictionary */
440 if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
441 /* This fails for example for DVD/CD drives, which we want to ignore anyway */
442 DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
443 IOObjectRelease (disk);
444 continue;
445 }
446 if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
447 ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
448 IOObjectRelease (disk_child);
449 IOObjectRelease (disk);
450 continue;
451 }
453 /* extract name and major/minor numbers */
454 memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
455 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
456 if (tmp_cf_string_ref) {
457 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
458 CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
459 }
460 disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
461 disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
462 DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
463 CFRelease (child_dict);
464 IOObjectRelease (disk_child);
466 /* get property dictionary of the disk entry itself */
467 if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
468 ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
469 IOObjectRelease (disk);
470 continue;
471 }
473 /* extract name and stats dictionary */
474 memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
475 tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
476 if (tmp_cf_string_ref) {
477 assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
478 CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
479 }
480 stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
481 if (stats_dict == NULL) {
482 ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
483 CFRelease (props_dict);
484 IOObjectRelease (disk);
485 continue;
486 }
487 DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
489 /* choose name */
490 if (use_bsd_name) {
491 if (child_disk_name_bsd[0] != 0)
492 sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
493 else if (props_disk_name_bsd[0] != 0)
494 sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
495 else {
496 ERROR ("disk plugin: can't find bsd disk name.");
497 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
498 }
499 }
500 else
501 ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
503 DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
505 /* check the name against ignore list */
506 if (ignorelist_match (ignorelist, disk_name) != 0) {
507 CFRelease (props_dict);
508 IOObjectRelease (disk);
509 continue;
510 }
512 /* extract the stats */
513 read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
514 read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
515 read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
516 write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
517 write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
518 write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
519 CFRelease (props_dict);
520 IOObjectRelease (disk);
522 /* and submit */
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);
530 }
531 IOObjectRelease (disk_list);
532 /* #endif HAVE_IOKIT_IOKITLIB_H */
534 #elif KERNEL_FREEBSD
535 int retry, dirty;
537 void *snap = NULL;
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;
545 for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
546 if (snap != NULL)
547 geom_stats_snapshot_free(snap);
549 /* Get a fresh copy of stats snapshot */
550 snap = geom_stats_snapshot_get();
551 if (snap == NULL) {
552 ERROR("disk plugin: geom_stats_snapshot_get() failed.");
553 return (-1);
554 }
556 /* Check if we have dirty read from this snapshot */
557 dirty = 0;
558 geom_stats_snapshot_reset(snap);
559 while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
560 if (snap_iter->id == NULL)
561 continue;
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);
570 return (-1);
571 }
572 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
573 }
574 /*
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.
578 */
579 if (geom_id == NULL)
580 continue;
582 /* Only collect PROVIDER data */
583 if (geom_id->lg_what != ISPROVIDER)
584 continue;
586 /* Only collect data when rank is 1 (physical devices) */
587 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
588 continue;
590 /* Check if this is a dirty read quit for another try */
591 if (snap_iter->sequence0 != snap_iter->sequence1) {
592 dirty = 1;
593 break;
594 }
595 }
596 }
598 /* Reset iterator */
599 geom_stats_snapshot_reset(snap);
600 for (;;) {
601 snap_iter = geom_stats_snapshot_next(snap);
602 if (snap_iter == NULL)
603 break;
605 if (snap_iter->id == NULL)
606 continue;
607 geom_id = geom_lookupid(&geom_tree, snap_iter->id);
608 if (geom_id == NULL)
609 continue;
610 if (geom_id->lg_what != ISPROVIDER)
611 continue;
612 if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
613 continue;
614 /* Skip dirty reads, if present */
615 if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
616 continue;
618 disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
620 if (ignorelist_match (ignorelist, disk_name) != 0)
621 continue;
623 if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
624 disk_submit(disk_name, "disk_octets",
625 (derive_t)snap_iter->bytes[DEVSTAT_READ],
626 (derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
627 }
629 if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
630 disk_submit(disk_name, "disk_ops",
631 (derive_t)snap_iter->operations[DEVSTAT_READ],
632 (derive_t)snap_iter->operations[DEVSTAT_WRITE]);
633 }
635 read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
636 write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
637 if ((read_time != 0) || (write_time != 0)) {
638 disk_submit (disk_name, "disk_time",
639 (derive_t)(read_time*1000), (derive_t)(write_time*1000));
640 }
641 if (devstat_compute_statistics(snap_iter, NULL, 1.0,
642 DSM_TOTAL_BUSY_TIME, &busy_time,
643 DSM_TOTAL_DURATION, &total_duration,
644 DSM_NONE) != 0) {
645 WARNING("%s", devstat_errbuf);
646 }
647 else
648 {
649 submit_io_time(disk_name, busy_time, total_duration);
650 }
651 }
652 geom_stats_snapshot_free(snap);
654 #elif KERNEL_LINUX
655 FILE *fh;
656 char buffer[1024];
658 char *fields[32];
659 int numfields;
660 int fieldshift = 0;
662 int minor = 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;
676 int is_disk = 0;
678 diskstats_t *ds, *pre_ds;
680 if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
681 {
682 fh = fopen ("/proc/partitions", "r");
683 if (fh == NULL)
684 {
685 ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
686 return (-1);
687 }
689 /* Kernel is 2.4.* */
690 fieldshift = 1;
691 }
693 #if HAVE_LIBUDEV
694 handle_udev = udev_new();
695 #endif
697 while (fgets (buffer, sizeof (buffer), fh) != NULL)
698 {
699 char *disk_name;
700 char *output_name;
702 numfields = strsplit (buffer, fields, 32);
704 if ((numfields != (14 + fieldshift)) && (numfields != 7))
705 continue;
707 minor = atoll (fields[1]);
709 disk_name = fields[2 + fieldshift];
711 for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
712 if (strcmp (disk_name, ds->name) == 0)
713 break;
715 if (ds == NULL)
716 {
717 if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
718 continue;
720 if ((ds->name = strdup (disk_name)) == NULL)
721 {
722 free (ds);
723 continue;
724 }
726 if (pre_ds == NULL)
727 disklist = ds;
728 else
729 pre_ds->next = ds;
730 }
732 is_disk = 0;
733 if (numfields == 7)
734 {
735 /* Kernel 2.6, Partition */
736 read_ops = atoll (fields[3]);
737 read_sectors = atoll (fields[4]);
738 write_ops = atoll (fields[5]);
739 write_sectors = atoll (fields[6]);
740 }
741 else if (numfields == (14 + fieldshift))
742 {
743 read_ops = atoll (fields[3 + fieldshift]);
744 write_ops = atoll (fields[7 + fieldshift]);
746 read_sectors = atoll (fields[5 + fieldshift]);
747 write_sectors = atoll (fields[9 + fieldshift]);
749 if ((fieldshift == 0) || (minor == 0))
750 {
751 is_disk = 1;
752 read_merged = atoll (fields[4 + fieldshift]);
753 read_time = atoll (fields[6 + fieldshift]);
754 write_merged = atoll (fields[8 + fieldshift]);
755 write_time = atoll (fields[10+ fieldshift]);
757 in_progress = atof (fields[11 + fieldshift]);
759 io_time = atof (fields[12 + fieldshift]);
760 weighted_time = atof (fields[13 + fieldshift]);
761 }
762 }
763 else
764 {
765 DEBUG ("numfields = %i; => unknown file format.", numfields);
766 continue;
767 }
769 {
770 derive_t diff_read_sectors;
771 derive_t diff_write_sectors;
773 /* If the counter wraps around, it's only 32 bits.. */
774 if (read_sectors < ds->read_sectors)
775 diff_read_sectors = 1 + read_sectors
776 + (UINT_MAX - ds->read_sectors);
777 else
778 diff_read_sectors = read_sectors - ds->read_sectors;
779 if (write_sectors < ds->write_sectors)
780 diff_write_sectors = 1 + write_sectors
781 + (UINT_MAX - ds->write_sectors);
782 else
783 diff_write_sectors = write_sectors - ds->write_sectors;
785 ds->read_bytes += 512 * diff_read_sectors;
786 ds->write_bytes += 512 * diff_write_sectors;
787 ds->read_sectors = read_sectors;
788 ds->write_sectors = write_sectors;
789 }
791 /* Calculate the average time an io-op needs to complete */
792 if (is_disk)
793 {
794 derive_t diff_read_ops;
795 derive_t diff_write_ops;
796 derive_t diff_read_time;
797 derive_t diff_write_time;
799 if (read_ops < ds->read_ops)
800 diff_read_ops = 1 + read_ops
801 + (UINT_MAX - ds->read_ops);
802 else
803 diff_read_ops = read_ops - ds->read_ops;
804 DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
805 "ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
806 disk_name,
807 read_ops, ds->read_ops, diff_read_ops);
809 if (write_ops < ds->write_ops)
810 diff_write_ops = 1 + write_ops
811 + (UINT_MAX - ds->write_ops);
812 else
813 diff_write_ops = write_ops - ds->write_ops;
815 if (read_time < ds->read_time)
816 diff_read_time = 1 + read_time
817 + (UINT_MAX - ds->read_time);
818 else
819 diff_read_time = read_time - ds->read_time;
821 if (write_time < ds->write_time)
822 diff_write_time = 1 + write_time
823 + (UINT_MAX - ds->write_time);
824 else
825 diff_write_time = write_time - ds->write_time;
827 if (diff_read_ops != 0)
828 ds->avg_read_time += disk_calc_time_incr (
829 diff_read_time, diff_read_ops);
830 if (diff_write_ops != 0)
831 ds->avg_write_time += disk_calc_time_incr (
832 diff_write_time, diff_write_ops);
834 ds->read_ops = read_ops;
835 ds->read_time = read_time;
836 ds->write_ops = write_ops;
837 ds->write_time = write_time;
839 if (read_merged || write_merged)
840 ds->has_merged = 1;
842 if (in_progress)
843 ds->has_in_progress = 1;
845 if (io_time)
846 ds->has_io_time = 1;
848 } /* if (is_disk) */
850 /* Don't write to the RRDs if we've just started.. */
851 ds->poll_count++;
852 if (ds->poll_count <= 2)
853 {
854 DEBUG ("disk plugin: (ds->poll_count = %i) <= "
855 "(min_poll_count = 2); => Not writing.",
856 ds->poll_count);
857 continue;
858 }
860 if ((read_ops == 0) && (write_ops == 0))
861 {
862 DEBUG ("disk plugin: ((read_ops == 0) && "
863 "(write_ops == 0)); => Not writing.");
864 continue;
865 }
867 output_name = disk_name;
869 #if HAVE_LIBUDEV
870 char *alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
871 if (alt_name != NULL)
872 output_name = alt_name;
873 #endif
875 if (ignorelist_match (ignorelist, output_name) != 0)
876 continue;
878 if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
879 disk_submit (output_name, "disk_octets",
880 ds->read_bytes, ds->write_bytes);
882 if ((ds->read_ops != 0) || (ds->write_ops != 0))
883 disk_submit (output_name, "disk_ops",
884 read_ops, write_ops);
886 if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
887 disk_submit (output_name, "disk_time",
888 ds->avg_read_time, ds->avg_write_time);
890 if (is_disk)
891 {
892 if (ds->has_merged)
893 disk_submit (output_name, "disk_merged",
894 read_merged, write_merged);
895 if (ds->has_in_progress)
896 submit_in_progress (output_name, in_progress);
897 if (ds->has_io_time)
898 submit_io_time (output_name, io_time, weighted_time);
899 } /* if (is_disk) */
901 #if HAVE_LIBUDEV
902 /* release udev-based alternate name, if allocated */
903 sfree (alt_name);
904 #endif
905 } /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
907 #if HAVE_LIBUDEV
908 udev_unref(handle_udev);
909 #endif
911 fclose (fh);
912 /* #endif defined(KERNEL_LINUX) */
914 #elif HAVE_LIBKSTAT
915 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
916 # define KIO_ROCTETS reads
917 # define KIO_WOCTETS writes
918 # define KIO_ROPS nreads
919 # define KIO_WOPS nwrites
920 # define KIO_RTIME rtime
921 # define KIO_WTIME wtime
922 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
923 # define KIO_ROCTETS nread
924 # define KIO_WOCTETS nwritten
925 # define KIO_ROPS reads
926 # define KIO_WOPS writes
927 # define KIO_RTIME rtime
928 # define KIO_WTIME wtime
929 # else
930 # error "kstat_io_t does not have the required members"
931 # endif
932 static kstat_io_t kio;
933 int i;
935 if (kc == NULL)
936 return (-1);
938 for (i = 0; i < numdisk; i++)
939 {
940 if (kstat_read (kc, ksp[i], &kio) == -1)
941 continue;
943 if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
944 {
945 if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
946 continue;
948 disk_submit (ksp[i]->ks_name, "disk_octets",
949 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
950 disk_submit (ksp[i]->ks_name, "disk_ops",
951 kio.KIO_ROPS, kio.KIO_WOPS);
952 /* FIXME: Convert this to microseconds if necessary */
953 disk_submit (ksp[i]->ks_name, "disk_time",
954 kio.KIO_RTIME, kio.KIO_WTIME);
955 }
956 else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
957 {
958 if (ignorelist_match (ignorelist, ksp[i]->ks_name) != 0)
959 continue;
961 disk_submit (ksp[i]->ks_name, "disk_octets",
962 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
963 disk_submit (ksp[i]->ks_name, "disk_ops",
964 kio.KIO_ROPS, kio.KIO_WOPS);
965 }
966 }
967 /* #endif defined(HAVE_LIBKSTAT) */
969 #elif defined(HAVE_LIBSTATGRAB)
970 sg_disk_io_stats *ds;
971 # if HAVE_LIBSTATGRAB_0_90
972 size_t disks;
973 # else
974 int disks;
975 #endif
976 int counter;
977 char name[DATA_MAX_NAME_LEN];
979 if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
980 return (0);
982 for (counter=0; counter < disks; counter++) {
983 strncpy(name, ds->disk_name, sizeof(name));
984 name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
986 if (ignorelist_match (ignorelist, name) != 0) {
987 ds++;
988 continue;
989 }
991 disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
992 ds++;
993 }
994 /* #endif defined(HAVE_LIBSTATGRAB) */
996 #elif defined(HAVE_PERFSTAT)
997 derive_t read_sectors;
998 derive_t write_sectors;
999 derive_t read_time;
1000 derive_t write_time;
1001 derive_t read_ops;
1002 derive_t write_ops;
1003 perfstat_id_t firstpath;
1004 int rnumdisk;
1005 int i;
1007 if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
1008 {
1009 char errbuf[1024];
1010 WARNING ("disk plugin: perfstat_disk: %s",
1011 sstrerror (errno, errbuf, sizeof (errbuf)));
1012 return (-1);
1013 }
1015 if (numdisk != pnumdisk || stat_disk==NULL) {
1016 if (stat_disk!=NULL)
1017 free(stat_disk);
1018 stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
1019 }
1020 pnumdisk = numdisk;
1022 firstpath.name[0]='\0';
1023 if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
1024 {
1025 char errbuf[1024];
1026 WARNING ("disk plugin: perfstat_disk : %s",
1027 sstrerror (errno, errbuf, sizeof (errbuf)));
1028 return (-1);
1029 }
1031 for (i = 0; i < rnumdisk; i++)
1032 {
1033 if (ignorelist_match (ignorelist, stat_disk[i].name) != 0)
1034 continue;
1036 read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
1037 write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
1038 disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
1040 read_ops = stat_disk[i].xrate;
1041 write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
1042 disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
1044 read_time = stat_disk[i].rserv;
1045 read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1046 write_time = stat_disk[i].wserv;
1047 write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
1048 disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
1049 }
1050 #endif /* defined(HAVE_PERFSTAT) */
1052 return (0);
1053 } /* int disk_read */
1055 void module_register (void)
1056 {
1057 plugin_register_config ("disk", disk_config,
1058 config_keys, config_keys_num);
1059 plugin_register_init ("disk", disk_init);
1060 plugin_register_read ("disk", disk_read);
1061 } /* void module_register */