10 #include <sys/statvfs.h>
11 #include <sys/types.h>
17 #include "appconfig.h"
20 #include "plugin_proc.h"
22 #include "proc_self_mountinfo.h"
24 #define RRD_TYPE_DISK "disk"
26 #define DISK_TYPE_PHYSICAL 1
27 #define DISK_TYPE_PARTITION 2
28 #define DISK_TYPE_CONTAINER 3
31 char *disk; // the name of the disk (sda, sdb, etc)
38 // disk options caching
53 static struct mountinfo *disk_mountinfo_root = NULL;
55 static struct disk *get_disk(unsigned long major, unsigned long minor, char *disk) {
56 static char path_to_get_hw_sector_size[FILENAME_MAX + 1] = "";
57 static char path_to_get_hw_sector_size_partitions[FILENAME_MAX + 1] = "";
58 static char path_find_block_device[FILENAME_MAX + 1] = "";
61 // search for it in our RAM list.
62 // this is sequential, but since we just walk through
63 // and the number of disks / partitions in a system
64 // should not be that many, it should be acceptable
65 for(d = disk_root; d ; d = d->next)
66 if(unlikely(d->major == major && d->minor == minor))
69 // if we found it, return it
74 // create a new disk structure
75 d = (struct disk *)malloc(sizeof(struct disk));
76 if(!d) fatal("Cannot allocate memory for struct disk in proc_diskstats.");
78 d->disk = strdup(disk);
81 d->type = DISK_TYPE_PHYSICAL; // Default type. Changed later if not correct.
83 d->sector_size = 512; // the default, will be changed below
86 // append it to the list
91 for(last = disk_root; last->next ;last = last->next);
95 // ------------------------------------------------------------------------
96 // find the type of the device
98 char buffer[FILENAME_MAX + 1];
100 // get the default path for finding info about the block device
101 if(unlikely(!path_find_block_device[0])) {
102 snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/dev/block/%lu:%lu/%s");
103 snprintfz(path_find_block_device, FILENAME_MAX, "%s", config_get("plugin:proc:/proc/diskstats", "path to get block device infos", buffer));
106 // find if it is a partition
107 // by checking if /sys/dev/block/MAJOR:MINOR/partition is readable.
108 snprintfz(buffer, FILENAME_MAX, path_find_block_device, major, minor, "partition");
109 if(access(buffer, R_OK) == 0) {
110 d->type = DISK_TYPE_PARTITION;
112 // find if it is a container
113 // by checking if /sys/dev/block/MAJOR:MINOR/slaves has entries
114 snprintfz(buffer, FILENAME_MAX, path_find_block_device, major, minor, "slaves/");
115 DIR *dirp = opendir(buffer);
118 while( (dp = readdir(dirp)) ) {
119 // . and .. are also files in empty folders.
120 if(strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0) {
124 d->type = DISK_TYPE_CONTAINER;
126 // Stop the loop after we found one file.
129 if(closedir(dirp) == -1)
130 error("Unable to close dir %s", buffer);
134 // ------------------------------------------------------------------------
135 // check if we can find its mount point
137 // mountinfo_find() can be called with NULL disk_mountinfo_root
138 struct mountinfo *mi = mountinfo_find(disk_mountinfo_root, d->major, d->minor);
140 // mountinfo_free() can be called with NULL disk_mountinfo_root
141 mountinfo_free(disk_mountinfo_root);
143 // re-read mountinfo in case something changed
144 disk_mountinfo_root = mountinfo_read();
146 // search again for this disk
147 mi = mountinfo_find(disk_mountinfo_root, d->major, d->minor);
151 d->mount_point = strdup(mi->mount_point);
152 // no need to check for NULL
154 d->mount_point = NULL;
156 // ------------------------------------------------------------------------
157 // find the disk sector size
159 if(!path_to_get_hw_sector_size[0]) {
160 snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/block/%s/queue/hw_sector_size");
161 snprintfz(path_to_get_hw_sector_size, FILENAME_MAX, "%s", config_get("plugin:proc:/proc/diskstats", "path to get h/w sector size", buffer));
163 if(!path_to_get_hw_sector_size_partitions[0]) {
164 snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/dev/block/%lu:%lu/subsystem/%s/../queue/hw_sector_size");
165 snprintfz(path_to_get_hw_sector_size_partitions, FILENAME_MAX, "%s", config_get("plugin:proc:/proc/diskstats", "path to get h/w sector size for partitions", buffer));
169 char tf[FILENAME_MAX + 1], *t;
170 strncpyz(tf, d->disk, FILENAME_MAX);
172 // replace all / with !
174 if(*t == '/') *t = '!';
176 if(d->type == DISK_TYPE_PARTITION)
177 snprintfz(buffer, FILENAME_MAX, path_to_get_hw_sector_size_partitions, d->major, d->minor, tf);
179 snprintfz(buffer, FILENAME_MAX, path_to_get_hw_sector_size, tf);
181 FILE *fpss = fopen(buffer, "r");
183 char buffer2[1024 + 1];
184 char *tmp = fgets(buffer2, 1024, fpss);
187 d->sector_size = atoi(tmp);
188 if(d->sector_size <= 0) {
189 error("Invalid sector size %d for device %s in %s. Assuming 512.", d->sector_size, d->disk, buffer);
190 d->sector_size = 512;
193 else error("Cannot read data for sector size for device %s from %s. Assuming 512.", d->disk, buffer);
197 else error("Cannot read sector size for device %s from %s. Assuming 512.", d->disk, buffer);
203 static inline int select_positive_option(int option1, int option2) {
204 if(option1 == CONFIG_ONDEMAND_YES || option2 == CONFIG_ONDEMAND_YES)
205 return CONFIG_ONDEMAND_YES;
206 else if(option1 == CONFIG_ONDEMAND_ONDEMAND || option2 == CONFIG_ONDEMAND_ONDEMAND)
207 return CONFIG_ONDEMAND_ONDEMAND;
209 return CONFIG_ONDEMAND_NO;
212 int do_proc_diskstats(int update_every, unsigned long long dt) {
213 static procfile *ff = NULL;
214 static struct statvfs buff_statvfs;
215 static struct stat buff_stat;
216 static int global_enable_new_disks_detected_at_runtime = CONFIG_ONDEMAND_YES,
217 global_enable_performance_for_physical_disks = CONFIG_ONDEMAND_ONDEMAND,
218 global_enable_performance_for_virtual_disks = CONFIG_ONDEMAND_NO,
219 global_enable_performance_for_partitions = CONFIG_ONDEMAND_NO,
220 global_enable_performance_for_mountpoints = CONFIG_ONDEMAND_NO,
221 global_enable_performance_for_virtual_mountpoints = CONFIG_ONDEMAND_ONDEMAND,
222 global_enable_space_for_mountpoints = CONFIG_ONDEMAND_ONDEMAND,
223 global_do_io = CONFIG_ONDEMAND_ONDEMAND,
224 global_do_ops = CONFIG_ONDEMAND_ONDEMAND,
225 global_do_mops = CONFIG_ONDEMAND_ONDEMAND,
226 global_do_iotime = CONFIG_ONDEMAND_ONDEMAND,
227 global_do_qops = CONFIG_ONDEMAND_ONDEMAND,
228 global_do_util = CONFIG_ONDEMAND_ONDEMAND,
229 global_do_backlog = CONFIG_ONDEMAND_ONDEMAND,
230 global_do_space = CONFIG_ONDEMAND_ONDEMAND,
231 global_do_inodes = CONFIG_ONDEMAND_ONDEMAND,
232 globals_initialized = 0;
234 if(unlikely(!globals_initialized)) {
235 global_enable_new_disks_detected_at_runtime = config_get_boolean("plugin:proc:/proc/diskstats", "enable new disks detected at runtime", global_enable_new_disks_detected_at_runtime);
237 global_enable_performance_for_physical_disks = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for physical disks", global_enable_performance_for_physical_disks);
238 global_enable_performance_for_virtual_disks = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for virtual disks", global_enable_performance_for_virtual_disks);
239 global_enable_performance_for_partitions = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for partitions", global_enable_performance_for_partitions);
240 global_enable_performance_for_mountpoints = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for mounted filesystems", global_enable_performance_for_mountpoints);
241 global_enable_performance_for_virtual_mountpoints = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for mounted virtual disks", global_enable_performance_for_virtual_mountpoints);
242 global_enable_space_for_mountpoints = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "space metrics for mounted filesystems", global_enable_space_for_mountpoints);
244 global_do_io = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "bandwidth for all disks", global_do_io);
245 global_do_ops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "operations for all disks", global_do_ops);
246 global_do_mops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "merged operations for all disks", global_do_mops);
247 global_do_iotime = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "i/o time for all disks", global_do_iotime);
248 global_do_qops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "queued operations for all disks", global_do_qops);
249 global_do_util = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "utilization percentage for all disks", global_do_util);
250 global_do_backlog = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "backlog for all disks", global_do_backlog);
251 global_do_space = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "space usage for all disks", global_do_space);
252 global_do_inodes = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "inodes usage for all disks", global_do_inodes);
254 globals_initialized = 1;
258 char filename[FILENAME_MAX + 1];
259 snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/diskstats");
260 ff = procfile_open(config_get("plugin:proc:/proc/diskstats", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
264 ff = procfile_readall(ff);
265 if(!ff) return 0; // we return 0, so that we will retry to open it next time
267 uint32_t lines = procfile_lines(ff), l;
270 for(l = 0; l < lines ;l++) {
271 // --------------------------------------------------------------------------
275 unsigned long long major = 0, minor = 0,
276 reads = 0, mreads = 0, readsectors = 0, readms = 0,
277 writes = 0, mwrites = 0, writesectors = 0, writems = 0,
278 queued_ios = 0, busy_ms = 0, backlog_ms = 0,
279 space_avail = 0, space_avail_root = 0, space_used = 0,
280 inodes_avail = 0, inodes_avail_root = 0, inodes_used = 0;
282 unsigned long long last_reads = 0, last_readsectors = 0, last_readms = 0,
283 last_writes = 0, last_writesectors = 0, last_writems = 0,
286 words = procfile_linewords(ff, l);
287 if(words < 14) continue;
289 major = strtoull(procfile_lineword(ff, l, 0), NULL, 10);
290 minor = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
291 disk = procfile_lineword(ff, l, 2);
293 // # of reads completed # of writes completed
294 // This is the total number of reads or writes completed successfully.
295 reads = strtoull(procfile_lineword(ff, l, 3), NULL, 10); // rd_ios
296 writes = strtoull(procfile_lineword(ff, l, 7), NULL, 10); // wr_ios
298 // # of reads merged # of writes merged
299 // Reads and writes which are adjacent to each other may be merged for
300 // efficiency. Thus two 4K reads may become one 8K read before it is
301 // ultimately handed to the disk, and so it will be counted (and queued)
302 mreads = strtoull(procfile_lineword(ff, l, 4), NULL, 10); // rd_merges_or_rd_sec
303 mwrites = strtoull(procfile_lineword(ff, l, 8), NULL, 10); // wr_merges
305 // # of sectors read # of sectors written
306 // This is the total number of sectors read or written successfully.
307 readsectors = strtoull(procfile_lineword(ff, l, 5), NULL, 10); // rd_sec_or_wr_ios
308 writesectors = strtoull(procfile_lineword(ff, l, 9), NULL, 10); // wr_sec
310 // # of milliseconds spent reading # of milliseconds spent writing
311 // This is the total number of milliseconds spent by all reads or writes (as
312 // measured from __make_request() to end_that_request_last()).
313 readms = strtoull(procfile_lineword(ff, l, 6), NULL, 10); // rd_ticks_or_wr_sec
314 writems = strtoull(procfile_lineword(ff, l, 10), NULL, 10); // wr_ticks
316 // # of I/Os currently in progress
317 // The only field that should go to zero. Incremented as requests are
318 // given to appropriate struct request_queue and decremented as they finish.
319 queued_ios = strtoull(procfile_lineword(ff, l, 11), NULL, 10); // ios_pgr
321 // # of milliseconds spent doing I/Os
322 // This field increases so long as field queued_ios is nonzero.
323 busy_ms = strtoull(procfile_lineword(ff, l, 12), NULL, 10); // tot_ticks
325 // weighted # of milliseconds spent doing I/Os
326 // This field is incremented at each I/O start, I/O completion, I/O
327 // merge, or read of these stats by the number of I/Os in progress
328 // (field queued_ios) times the number of milliseconds spent doing I/O since the
329 // last update of this field. This can provide an easy measure of both
330 // I/O completion time and the backlog that may be accumulating.
331 backlog_ms = strtoull(procfile_lineword(ff, l, 13), NULL, 10); // rq_ticks
334 // --------------------------------------------------------------------------
335 // remove slashes from disk names
337 for(s = disk; *s ;s++)
338 if(*s == '/') *s = '_';
340 // --------------------------------------------------------------------------
341 // get a disk structure for the disk
343 struct disk *d = get_disk(major, minor, disk);
346 // --------------------------------------------------------------------------
347 // Set its family based on mount point
349 char *family = d->mount_point;
350 if(!family) family = disk;
353 // --------------------------------------------------------------------------
354 // Check the configuration for the device
356 if(unlikely(!d->configured)) {
357 char var_name[4096 + 1];
358 snprintfz(var_name, 4096, "plugin:proc:/proc/diskstats:%s", disk);
360 int def_enable = config_get_boolean_ondemand(var_name, "enable", global_enable_new_disks_detected_at_runtime);
361 if(def_enable == CONFIG_ONDEMAND_NO) {
362 // the user does not want any metrics for this disk
363 d->do_io = CONFIG_ONDEMAND_NO;
364 d->do_ops = CONFIG_ONDEMAND_NO;
365 d->do_mops = CONFIG_ONDEMAND_NO;
366 d->do_iotime = CONFIG_ONDEMAND_NO;
367 d->do_qops = CONFIG_ONDEMAND_NO;
368 d->do_util = CONFIG_ONDEMAND_NO;
369 d->do_backlog = CONFIG_ONDEMAND_NO;
370 d->do_space = CONFIG_ONDEMAND_NO;
371 d->do_inodes = CONFIG_ONDEMAND_NO;
374 // this disk is enabled
375 // check its direct settings
377 int def_performance = CONFIG_ONDEMAND_ONDEMAND;
378 int def_space = (d->mount_point)?CONFIG_ONDEMAND_ONDEMAND:CONFIG_ONDEMAND_NO;
380 // since this is 'on demand' we can figure the performance settings
381 // based on the type of disk
384 case DISK_TYPE_PHYSICAL:
385 def_performance = global_enable_performance_for_physical_disks;
388 case DISK_TYPE_PARTITION:
389 def_performance = global_enable_performance_for_partitions;
392 case DISK_TYPE_CONTAINER:
393 def_performance = global_enable_performance_for_virtual_disks;
396 def_performance = select_positive_option(def_performance, global_enable_performance_for_virtual_mountpoints);
402 def_performance = select_positive_option(def_performance, global_enable_performance_for_mountpoints);
404 // ------------------------------------------------------------
405 // now we have def_performance and def_space
409 // check the user configuration (this will also show our 'on demand' decision)
410 def_performance = config_get_boolean_ondemand(var_name, "enable performance metrics", def_performance);
412 int ddo_io = CONFIG_ONDEMAND_NO,
413 ddo_ops = CONFIG_ONDEMAND_NO,
414 ddo_mops = CONFIG_ONDEMAND_NO,
415 ddo_iotime = CONFIG_ONDEMAND_NO,
416 ddo_qops = CONFIG_ONDEMAND_NO,
417 ddo_util = CONFIG_ONDEMAND_NO,
418 ddo_backlog = CONFIG_ONDEMAND_NO;
420 // we enable individual performance charts only when def_performance is not disabled
421 if(def_performance != CONFIG_ONDEMAND_NO) {
422 ddo_io = global_do_io,
423 ddo_ops = global_do_ops,
424 ddo_mops = global_do_mops,
425 ddo_iotime = global_do_iotime,
426 ddo_qops = global_do_qops,
427 ddo_util = global_do_util,
428 ddo_backlog = global_do_backlog;
431 d->do_io = config_get_boolean_ondemand(var_name, "bandwidth", ddo_io);
432 d->do_ops = config_get_boolean_ondemand(var_name, "operations", ddo_ops);
433 d->do_mops = config_get_boolean_ondemand(var_name, "merged operations", ddo_mops);
434 d->do_iotime = config_get_boolean_ondemand(var_name, "i/o time", ddo_iotime);
435 d->do_qops = config_get_boolean_ondemand(var_name, "queued operations", ddo_qops);
436 d->do_util = config_get_boolean_ondemand(var_name, "utilization percentage", ddo_util);
437 d->do_backlog = config_get_boolean_ondemand(var_name, "backlog", ddo_backlog);
441 // check the user configuration (this will also show our 'on demand' decision)
442 def_space = config_get_boolean_ondemand(var_name, "enable space metrics", def_space);
444 int ddo_space = def_space,
445 ddo_inodes = def_space;
447 d->do_space = config_get_boolean_ondemand(var_name, "space usage", ddo_space);
448 d->do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", ddo_inodes);
451 // don't show settings for this disk
452 d->do_space = CONFIG_ONDEMAND_NO;
453 d->do_inodes = CONFIG_ONDEMAND_NO;
462 // --------------------------------------------------------------------------
463 // Do performance metrics
465 if(d->do_io == CONFIG_ONDEMAND_YES || (d->do_io == CONFIG_ONDEMAND_ONDEMAND && (readsectors || writesectors))) {
466 d->do_io = CONFIG_ONDEMAND_YES;
468 st = rrdset_find_bytype(RRD_TYPE_DISK, disk);
470 st = rrdset_create(RRD_TYPE_DISK, disk, NULL, family, "disk.io", "Disk I/O Bandwidth", "kilobytes/s", 2000, update_every, RRDSET_TYPE_AREA);
472 rrddim_add(st, "reads", NULL, d->sector_size, 1024, RRDDIM_INCREMENTAL);
473 rrddim_add(st, "writes", NULL, d->sector_size * -1, 1024, RRDDIM_INCREMENTAL);
475 else rrdset_next_usec(st, dt);
477 last_readsectors = rrddim_set(st, "reads", readsectors);
478 last_writesectors = rrddim_set(st, "writes", writesectors);
482 // --------------------------------------------------------------------
484 if(d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes))) {
485 d->do_ops = CONFIG_ONDEMAND_YES;
487 st = rrdset_find_bytype("disk_ops", disk);
489 st = rrdset_create("disk_ops", disk, NULL, family, "disk.ops", "Disk Completed I/O Operations", "operations/s", 2001, update_every, RRDSET_TYPE_LINE);
492 rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
493 rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
495 else rrdset_next_usec(st, dt);
497 last_reads = rrddim_set(st, "reads", reads);
498 last_writes = rrddim_set(st, "writes", writes);
502 // --------------------------------------------------------------------
504 if(d->do_qops == CONFIG_ONDEMAND_YES || (d->do_qops == CONFIG_ONDEMAND_ONDEMAND && queued_ios)) {
505 d->do_qops = CONFIG_ONDEMAND_YES;
507 st = rrdset_find_bytype("disk_qops", disk);
509 st = rrdset_create("disk_qops", disk, NULL, family, "disk.qops", "Disk Current I/O Operations", "operations", 2002, update_every, RRDSET_TYPE_LINE);
512 rrddim_add(st, "operations", NULL, 1, 1, RRDDIM_ABSOLUTE);
514 else rrdset_next_usec(st, dt);
516 rrddim_set(st, "operations", queued_ios);
520 // --------------------------------------------------------------------
522 if(d->do_backlog == CONFIG_ONDEMAND_YES || (d->do_backlog == CONFIG_ONDEMAND_ONDEMAND && backlog_ms)) {
523 d->do_backlog = CONFIG_ONDEMAND_YES;
525 st = rrdset_find_bytype("disk_backlog", disk);
527 st = rrdset_create("disk_backlog", disk, NULL, family, "disk.backlog", "Disk Backlog", "backlog (ms)", 2003, update_every, RRDSET_TYPE_AREA);
530 rrddim_add(st, "backlog", NULL, 1, 10, RRDDIM_INCREMENTAL);
532 else rrdset_next_usec(st, dt);
534 rrddim_set(st, "backlog", backlog_ms);
538 // --------------------------------------------------------------------
540 if(d->do_util == CONFIG_ONDEMAND_YES || (d->do_util == CONFIG_ONDEMAND_ONDEMAND && busy_ms)) {
541 d->do_util = CONFIG_ONDEMAND_YES;
543 st = rrdset_find_bytype("disk_util", disk);
545 st = rrdset_create("disk_util", disk, NULL, family, "disk.util", "Disk Utilization Time", "% of time working", 2004, update_every, RRDSET_TYPE_AREA);
548 rrddim_add(st, "utilization", NULL, 1, 10, RRDDIM_INCREMENTAL);
550 else rrdset_next_usec(st, dt);
552 last_busy_ms = rrddim_set(st, "utilization", busy_ms);
556 // --------------------------------------------------------------------
558 if(d->do_mops == CONFIG_ONDEMAND_YES || (d->do_mops == CONFIG_ONDEMAND_ONDEMAND && (mreads || mwrites))) {
559 d->do_mops = CONFIG_ONDEMAND_YES;
561 st = rrdset_find_bytype("disk_mops", disk);
563 st = rrdset_create("disk_mops", disk, NULL, family, "disk.mops", "Disk Merged Operations", "merged operations/s", 2021, update_every, RRDSET_TYPE_LINE);
566 rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
567 rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
569 else rrdset_next_usec(st, dt);
571 rrddim_set(st, "reads", mreads);
572 rrddim_set(st, "writes", mwrites);
576 // --------------------------------------------------------------------
578 if(d->do_iotime == CONFIG_ONDEMAND_YES || (d->do_iotime == CONFIG_ONDEMAND_ONDEMAND && (readms || writems))) {
579 d->do_iotime = CONFIG_ONDEMAND_YES;
581 st = rrdset_find_bytype("disk_iotime", disk);
583 st = rrdset_create("disk_iotime", disk, NULL, family, "disk.iotime", "Disk Total I/O Time", "milliseconds/s", 2022, update_every, RRDSET_TYPE_LINE);
586 rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL);
587 rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL);
589 else rrdset_next_usec(st, dt);
591 last_readms = rrddim_set(st, "reads", readms);
592 last_writems = rrddim_set(st, "writes", writems);
596 // --------------------------------------------------------------------
597 // calculate differential charts
598 // only if this is not the first time we run
601 if( (d->do_iotime == CONFIG_ONDEMAND_YES || (d->do_iotime == CONFIG_ONDEMAND_ONDEMAND && (readms || writems))) &&
602 (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) {
603 st = rrdset_find_bytype("disk_await", disk);
605 st = rrdset_create("disk_await", disk, NULL, family, "disk.await", "Average Completed I/O Operation Time", "ms per operation", 2005, update_every, RRDSET_TYPE_LINE);
608 rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_ABSOLUTE);
609 rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_ABSOLUTE);
611 else rrdset_next_usec(st, dt);
613 rrddim_set(st, "reads", (reads - last_reads) ? (readms - last_readms) / (reads - last_reads) : 0);
614 rrddim_set(st, "writes", (writes - last_writes) ? (writems - last_writems) / (writes - last_writes) : 0);
618 if( (d->do_io == CONFIG_ONDEMAND_YES || (d->do_io == CONFIG_ONDEMAND_ONDEMAND && (readsectors || writesectors))) &&
619 (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) {
620 st = rrdset_find_bytype("disk_avgsz", disk);
622 st = rrdset_create("disk_avgsz", disk, NULL, family, "disk.avgsz", "Average Completed I/O Operation Bandwidth", "kilobytes per operation", 2006, update_every, RRDSET_TYPE_AREA);
625 rrddim_add(st, "reads", NULL, d->sector_size, 1024, RRDDIM_ABSOLUTE);
626 rrddim_add(st, "writes", NULL, d->sector_size * -1, 1024, RRDDIM_ABSOLUTE);
628 else rrdset_next_usec(st, dt);
630 rrddim_set(st, "reads", (reads - last_reads) ? (readsectors - last_readsectors) / (reads - last_reads) : 0);
631 rrddim_set(st, "writes", (writes - last_writes) ? (writesectors - last_writesectors) / (writes - last_writes) : 0);
635 if( (d->do_util == CONFIG_ONDEMAND_YES || (d->do_util == CONFIG_ONDEMAND_ONDEMAND && busy_ms)) &&
636 (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) {
637 st = rrdset_find_bytype("disk_svctm", disk);
639 st = rrdset_create("disk_svctm", disk, NULL, family, "disk.svctm", "Average Service Time", "ms per operation", 2007, update_every, RRDSET_TYPE_LINE);
642 rrddim_add(st, "svctm", NULL, 1, 1, RRDDIM_ABSOLUTE);
644 else rrdset_next_usec(st, dt);
646 rrddim_set(st, "svctm", ((reads - last_reads) + (writes - last_writes)) ? (busy_ms - last_busy_ms) / ((reads - last_reads) + (writes - last_writes)) : 0);
651 // --------------------------------------------------------------------------
654 if(d->mount_point && (d->do_space || d->do_inodes) ) {
655 // collect space metrics using statvfs
657 if (statvfs(d->mount_point, &buff_statvfs) < 0)
658 error("Failed statvfs() for '%s' (disk '%s')", d->mount_point, d->disk);
660 space_avail = buff_statvfs.f_bavail * buff_statvfs.f_bsize;
661 space_avail_root = (buff_statvfs.f_bfree - buff_statvfs.f_bavail) * buff_statvfs.f_bsize;
662 space_used = (buff_statvfs.f_blocks - buff_statvfs.f_bfree) * buff_statvfs.f_bsize;
664 inodes_avail = buff_statvfs.f_favail;
665 inodes_avail_root = buff_statvfs.f_ffree - buff_statvfs.f_favail;
666 inodes_used = buff_statvfs.f_files - buff_statvfs.f_ffree;
668 // verify we collected the metrics for the right disk.
669 // if not the mountpoint has changed.
671 if(stat(d->mount_point, &buff_stat) == -1)
672 error("Failed to stat() for '%s' (disk '%s')", d->mount_point, d->disk);
674 if(major(buff_stat.st_dev) == major && minor(buff_stat.st_dev) == minor) {
676 // --------------------------------------------------------------------------
678 if(d->do_space == CONFIG_ONDEMAND_YES || (d->do_space == CONFIG_ONDEMAND_ONDEMAND && (space_avail || space_avail_root || space_used))) {
679 st = rrdset_find_bytype("disk_space", disk);
681 st = rrdset_create("disk_space", disk, NULL, family, "disk.space", "Disk Space Usage", "GB", 2023, update_every, RRDSET_TYPE_STACKED);
684 rrddim_add(st, "avail", NULL, 1, 1024*1024*1024, RRDDIM_ABSOLUTE);
685 rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1024*1024*1024, RRDDIM_ABSOLUTE);
686 rrddim_add(st, "used" , NULL, 1, 1024*1024*1024, RRDDIM_ABSOLUTE);
688 else rrdset_next_usec(st, dt);
690 rrddim_set(st, "avail", space_avail);
691 rrddim_set(st, "reserved_for_root", space_avail_root);
692 rrddim_set(st, "used", space_used);
696 // --------------------------------------------------------------------------
698 if(d->do_inodes == CONFIG_ONDEMAND_YES || (d->do_inodes == CONFIG_ONDEMAND_ONDEMAND && (inodes_avail || inodes_avail_root || inodes_used))) {
699 st = rrdset_find_bytype("disk_inodes", disk);
701 st = rrdset_create("disk_inodes", disk, NULL, family, "disk.inodes", "Disk Inodes Usage", "Inodes", 2024, update_every, RRDSET_TYPE_STACKED);
704 rrddim_add(st, "avail", NULL, 1, 1, RRDDIM_ABSOLUTE);
705 rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1, RRDDIM_ABSOLUTE);
706 rrddim_add(st, "used" , NULL, 1, 1, RRDDIM_ABSOLUTE);
708 else rrdset_next_usec(st, dt);
710 rrddim_set(st, "avail", inodes_avail);
711 rrddim_set(st, "reserved_for_root", inodes_avail_root);
712 rrddim_set(st, "used", inodes_used);