#include "common.h" #define RRD_TYPE_DISK "disk" #define DISK_TYPE_PHYSICAL 1 #define DISK_TYPE_PARTITION 2 #define DISK_TYPE_CONTAINER 3 static struct disk { char *disk; // the name of the disk (sda, sdb, etc) unsigned long major; unsigned long minor; int sector_size; int type; char *mount_point; // disk options caching int configured; int do_io; int do_ops; int do_mops; int do_iotime; int do_qops; int do_util; int do_backlog; int do_space; int do_inodes; struct disk *next; } *disk_root = NULL; static struct mountinfo *disk_mountinfo_root = NULL; static struct disk *get_disk(unsigned long major, unsigned long minor, char *disk) { static char path_to_get_hw_sector_size[FILENAME_MAX + 1] = ""; static char path_to_get_hw_sector_size_partitions[FILENAME_MAX + 1] = ""; static char path_find_block_device[FILENAME_MAX + 1] = ""; struct disk *d; // search for it in our RAM list. // this is sequential, but since we just walk through // and the number of disks / partitions in a system // should not be that many, it should be acceptable for(d = disk_root; d ; d = d->next) if(unlikely(d->major == major && d->minor == minor)) break; // if we found it, return it if(likely(d)) return d; // not found // create a new disk structure d = (struct disk *)mallocz(sizeof(struct disk)); d->disk = strdupz(disk); d->major = major; d->minor = minor; d->type = DISK_TYPE_PHYSICAL; // Default type. Changed later if not correct. d->configured = 0; d->sector_size = 512; // the default, will be changed below d->next = NULL; // append it to the list if(!disk_root) disk_root = d; else { struct disk *last; for(last = disk_root; last->next ;last = last->next); last->next = d; } // ------------------------------------------------------------------------ // find the type of the device char buffer[FILENAME_MAX + 1]; // get the default path for finding info about the block device if(unlikely(!path_find_block_device[0])) { snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/dev/block/%lu:%lu/%s"); snprintfz(path_find_block_device, FILENAME_MAX, "%s", config_get("plugin:proc:/proc/diskstats", "path to get block device infos", buffer)); } // find if it is a partition // by checking if /sys/dev/block/MAJOR:MINOR/partition is readable. snprintfz(buffer, FILENAME_MAX, path_find_block_device, major, minor, "partition"); if(access(buffer, R_OK) == 0) { d->type = DISK_TYPE_PARTITION; } else { // find if it is a container // by checking if /sys/dev/block/MAJOR:MINOR/slaves has entries snprintfz(buffer, FILENAME_MAX, path_find_block_device, major, minor, "slaves/"); DIR *dirp = opendir(buffer); if (dirp != NULL) { struct dirent *dp; while( (dp = readdir(dirp)) ) { // . and .. are also files in empty folders. if(strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0) { continue; } d->type = DISK_TYPE_CONTAINER; // Stop the loop after we found one file. break; } if(closedir(dirp) == -1) error("Unable to close dir %s", buffer); } } // ------------------------------------------------------------------------ // check if we can find its mount point // mountinfo_find() can be called with NULL disk_mountinfo_root struct mountinfo *mi = mountinfo_find(disk_mountinfo_root, d->major, d->minor); if(unlikely(!mi)) { // mountinfo_free() can be called with NULL disk_mountinfo_root mountinfo_free(disk_mountinfo_root); // re-read mountinfo in case something changed disk_mountinfo_root = mountinfo_read(); // search again for this disk mi = mountinfo_find(disk_mountinfo_root, d->major, d->minor); } if(mi) d->mount_point = strdupz(mi->mount_point); // no need to check for NULL else d->mount_point = NULL; // ------------------------------------------------------------------------ // find the disk sector size if(!path_to_get_hw_sector_size[0]) { snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/block/%s/queue/hw_sector_size"); snprintfz(path_to_get_hw_sector_size, FILENAME_MAX, "%s", config_get("plugin:proc:/proc/diskstats", "path to get h/w sector size", buffer)); } if(!path_to_get_hw_sector_size_partitions[0]) { snprintfz(buffer, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/dev/block/%lu:%lu/subsystem/%s/../queue/hw_sector_size"); 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)); } { char tf[FILENAME_MAX + 1], *t; strncpyz(tf, d->disk, FILENAME_MAX); // replace all / with ! for(t = tf; *t ;t++) if(*t == '/') *t = '!'; if(d->type == DISK_TYPE_PARTITION) snprintfz(buffer, FILENAME_MAX, path_to_get_hw_sector_size_partitions, d->major, d->minor, tf); else snprintfz(buffer, FILENAME_MAX, path_to_get_hw_sector_size, tf); FILE *fpss = fopen(buffer, "r"); if(fpss) { char buffer2[1024 + 1]; char *tmp = fgets(buffer2, 1024, fpss); if(tmp) { d->sector_size = atoi(tmp); if(d->sector_size <= 0) { error("Invalid sector size %d for device %s in %s. Assuming 512.", d->sector_size, d->disk, buffer); d->sector_size = 512; } } else error("Cannot read data for sector size for device %s from %s. Assuming 512.", d->disk, buffer); fclose(fpss); } else error("Cannot read sector size for device %s from %s. Assuming 512.", d->disk, buffer); } return d; } static inline int select_positive_option(int option1, int option2) { if(option1 == CONFIG_ONDEMAND_YES || option2 == CONFIG_ONDEMAND_YES) return CONFIG_ONDEMAND_YES; else if(option1 == CONFIG_ONDEMAND_ONDEMAND || option2 == CONFIG_ONDEMAND_ONDEMAND) return CONFIG_ONDEMAND_ONDEMAND; return CONFIG_ONDEMAND_NO; } int do_proc_diskstats(int update_every, unsigned long long dt) { static procfile *ff = NULL; static struct statvfs buff_statvfs; static struct stat buff_stat; static int global_enable_new_disks_detected_at_runtime = CONFIG_ONDEMAND_YES, global_enable_performance_for_physical_disks = CONFIG_ONDEMAND_ONDEMAND, global_enable_performance_for_virtual_disks = CONFIG_ONDEMAND_NO, global_enable_performance_for_partitions = CONFIG_ONDEMAND_NO, global_enable_performance_for_mountpoints = CONFIG_ONDEMAND_NO, global_enable_performance_for_virtual_mountpoints = CONFIG_ONDEMAND_ONDEMAND, global_enable_space_for_mountpoints = CONFIG_ONDEMAND_ONDEMAND, global_do_io = CONFIG_ONDEMAND_ONDEMAND, global_do_ops = CONFIG_ONDEMAND_ONDEMAND, global_do_mops = CONFIG_ONDEMAND_ONDEMAND, global_do_iotime = CONFIG_ONDEMAND_ONDEMAND, global_do_qops = CONFIG_ONDEMAND_ONDEMAND, global_do_util = CONFIG_ONDEMAND_ONDEMAND, global_do_backlog = CONFIG_ONDEMAND_ONDEMAND, global_do_space = CONFIG_ONDEMAND_ONDEMAND, global_do_inodes = CONFIG_ONDEMAND_ONDEMAND, globals_initialized = 0; if(unlikely(!globals_initialized)) { 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); 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); 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); global_enable_performance_for_partitions = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for partitions", global_enable_performance_for_partitions); global_enable_performance_for_mountpoints = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "performance metrics for mounted filesystems", global_enable_performance_for_mountpoints); 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); global_enable_space_for_mountpoints = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "space metrics for mounted filesystems", global_enable_space_for_mountpoints); global_do_io = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "bandwidth for all disks", global_do_io); global_do_ops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "operations for all disks", global_do_ops); global_do_mops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "merged operations for all disks", global_do_mops); global_do_iotime = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "i/o time for all disks", global_do_iotime); global_do_qops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "queued operations for all disks", global_do_qops); global_do_util = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "utilization percentage for all disks", global_do_util); global_do_backlog = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "backlog for all disks", global_do_backlog); global_do_space = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "space usage for all disks", global_do_space); global_do_inodes = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "inodes usage for all disks", global_do_inodes); globals_initialized = 1; } if(!ff) { char filename[FILENAME_MAX + 1]; snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/diskstats"); ff = procfile_open(config_get("plugin:proc:/proc/diskstats", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT); } if(!ff) return 1; ff = procfile_readall(ff); if(!ff) return 0; // we return 0, so that we will retry to open it next time uint32_t lines = procfile_lines(ff), l; uint32_t words; for(l = 0; l < lines ;l++) { // -------------------------------------------------------------------------- // Read parameters char *disk; unsigned long long major = 0, minor = 0, reads = 0, mreads = 0, readsectors = 0, readms = 0, writes = 0, mwrites = 0, writesectors = 0, writems = 0, queued_ios = 0, busy_ms = 0, backlog_ms = 0, space_avail = 0, space_avail_root = 0, space_used = 0, inodes_avail = 0, inodes_avail_root = 0, inodes_used = 0; unsigned long long last_reads = 0, last_readsectors = 0, last_readms = 0, last_writes = 0, last_writesectors = 0, last_writems = 0, last_busy_ms = 0; words = procfile_linewords(ff, l); if(words < 14) continue; major = strtoull(procfile_lineword(ff, l, 0), NULL, 10); minor = strtoull(procfile_lineword(ff, l, 1), NULL, 10); disk = procfile_lineword(ff, l, 2); // # of reads completed # of writes completed // This is the total number of reads or writes completed successfully. reads = strtoull(procfile_lineword(ff, l, 3), NULL, 10); // rd_ios writes = strtoull(procfile_lineword(ff, l, 7), NULL, 10); // wr_ios // # of reads merged # of writes merged // Reads and writes which are adjacent to each other may be merged for // efficiency. Thus two 4K reads may become one 8K read before it is // ultimately handed to the disk, and so it will be counted (and queued) mreads = strtoull(procfile_lineword(ff, l, 4), NULL, 10); // rd_merges_or_rd_sec mwrites = strtoull(procfile_lineword(ff, l, 8), NULL, 10); // wr_merges // # of sectors read # of sectors written // This is the total number of sectors read or written successfully. readsectors = strtoull(procfile_lineword(ff, l, 5), NULL, 10); // rd_sec_or_wr_ios writesectors = strtoull(procfile_lineword(ff, l, 9), NULL, 10); // wr_sec // # of milliseconds spent reading # of milliseconds spent writing // This is the total number of milliseconds spent by all reads or writes (as // measured from __make_request() to end_that_request_last()). readms = strtoull(procfile_lineword(ff, l, 6), NULL, 10); // rd_ticks_or_wr_sec writems = strtoull(procfile_lineword(ff, l, 10), NULL, 10); // wr_ticks // # of I/Os currently in progress // The only field that should go to zero. Incremented as requests are // given to appropriate struct request_queue and decremented as they finish. queued_ios = strtoull(procfile_lineword(ff, l, 11), NULL, 10); // ios_pgr // # of milliseconds spent doing I/Os // This field increases so long as field queued_ios is nonzero. busy_ms = strtoull(procfile_lineword(ff, l, 12), NULL, 10); // tot_ticks // weighted # of milliseconds spent doing I/Os // This field is incremented at each I/O start, I/O completion, I/O // merge, or read of these stats by the number of I/Os in progress // (field queued_ios) times the number of milliseconds spent doing I/O since the // last update of this field. This can provide an easy measure of both // I/O completion time and the backlog that may be accumulating. backlog_ms = strtoull(procfile_lineword(ff, l, 13), NULL, 10); // rq_ticks // -------------------------------------------------------------------------- // remove slashes from disk names char *s; for(s = disk; *s ;s++) if(*s == '/') *s = '_'; // -------------------------------------------------------------------------- // get a disk structure for the disk struct disk *d = get_disk(major, minor, disk); // -------------------------------------------------------------------------- // Set its family based on mount point char *family = d->mount_point; if(!family) family = disk; // -------------------------------------------------------------------------- // Check the configuration for the device if(unlikely(!d->configured)) { char var_name[4096 + 1]; snprintfz(var_name, 4096, "plugin:proc:/proc/diskstats:%s", disk); int def_enable = config_get_boolean_ondemand(var_name, "enable", global_enable_new_disks_detected_at_runtime); if(def_enable == CONFIG_ONDEMAND_NO) { // the user does not want any metrics for this disk d->do_io = CONFIG_ONDEMAND_NO; d->do_ops = CONFIG_ONDEMAND_NO; d->do_mops = CONFIG_ONDEMAND_NO; d->do_iotime = CONFIG_ONDEMAND_NO; d->do_qops = CONFIG_ONDEMAND_NO; d->do_util = CONFIG_ONDEMAND_NO; d->do_backlog = CONFIG_ONDEMAND_NO; d->do_space = CONFIG_ONDEMAND_NO; d->do_inodes = CONFIG_ONDEMAND_NO; } else { // this disk is enabled // check its direct settings int def_performance = CONFIG_ONDEMAND_ONDEMAND; int def_space = (d->mount_point)?CONFIG_ONDEMAND_ONDEMAND:CONFIG_ONDEMAND_NO; // since this is 'on demand' we can figure the performance settings // based on the type of disk switch(d->type) { case DISK_TYPE_PHYSICAL: def_performance = global_enable_performance_for_physical_disks; break; case DISK_TYPE_PARTITION: def_performance = global_enable_performance_for_partitions; break; case DISK_TYPE_CONTAINER: def_performance = global_enable_performance_for_virtual_disks; if(d->mount_point) def_performance = select_positive_option(def_performance, global_enable_performance_for_virtual_mountpoints); break; } if(d->mount_point) def_performance = select_positive_option(def_performance, global_enable_performance_for_mountpoints); // ------------------------------------------------------------ // now we have def_performance and def_space // to work further // def_performance // check the user configuration (this will also show our 'on demand' decision) def_performance = config_get_boolean_ondemand(var_name, "enable performance metrics", def_performance); int ddo_io = CONFIG_ONDEMAND_NO, ddo_ops = CONFIG_ONDEMAND_NO, ddo_mops = CONFIG_ONDEMAND_NO, ddo_iotime = CONFIG_ONDEMAND_NO, ddo_qops = CONFIG_ONDEMAND_NO, ddo_util = CONFIG_ONDEMAND_NO, ddo_backlog = CONFIG_ONDEMAND_NO; // we enable individual performance charts only when def_performance is not disabled if(def_performance != CONFIG_ONDEMAND_NO) { ddo_io = global_do_io, ddo_ops = global_do_ops, ddo_mops = global_do_mops, ddo_iotime = global_do_iotime, ddo_qops = global_do_qops, ddo_util = global_do_util, ddo_backlog = global_do_backlog; } d->do_io = config_get_boolean_ondemand(var_name, "bandwidth", ddo_io); d->do_ops = config_get_boolean_ondemand(var_name, "operations", ddo_ops); d->do_mops = config_get_boolean_ondemand(var_name, "merged operations", ddo_mops); d->do_iotime = config_get_boolean_ondemand(var_name, "i/o time", ddo_iotime); d->do_qops = config_get_boolean_ondemand(var_name, "queued operations", ddo_qops); d->do_util = config_get_boolean_ondemand(var_name, "utilization percentage", ddo_util); d->do_backlog = config_get_boolean_ondemand(var_name, "backlog", ddo_backlog); // def_space if(d->mount_point) { // check the user configuration (this will also show our 'on demand' decision) def_space = config_get_boolean_ondemand(var_name, "enable space metrics", def_space); int ddo_space = def_space, ddo_inodes = def_space; d->do_space = config_get_boolean_ondemand(var_name, "space usage", ddo_space); d->do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", ddo_inodes); } else { // don't show settings for this disk d->do_space = CONFIG_ONDEMAND_NO; d->do_inodes = CONFIG_ONDEMAND_NO; } } d->configured = 1; } RRDSET *st; // -------------------------------------------------------------------------- // Do performance metrics if(d->do_io == CONFIG_ONDEMAND_YES || (d->do_io == CONFIG_ONDEMAND_ONDEMAND && (readsectors || writesectors))) { d->do_io = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype(RRD_TYPE_DISK, disk); if(!st) { st = rrdset_create(RRD_TYPE_DISK, disk, NULL, family, "disk.io", "Disk I/O Bandwidth", "kilobytes/s", 2000, update_every, RRDSET_TYPE_AREA); rrddim_add(st, "reads", NULL, d->sector_size, 1024, RRDDIM_INCREMENTAL); rrddim_add(st, "writes", NULL, d->sector_size * -1, 1024, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); last_readsectors = rrddim_set(st, "reads", readsectors); last_writesectors = rrddim_set(st, "writes", writesectors); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes))) { d->do_ops = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_ops", disk); if(!st) { st = rrdset_create("disk_ops", disk, NULL, family, "disk.ops", "Disk Completed I/O Operations", "operations/s", 2001, update_every, RRDSET_TYPE_LINE); st->isdetail = 1; rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL); rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); last_reads = rrddim_set(st, "reads", reads); last_writes = rrddim_set(st, "writes", writes); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_qops == CONFIG_ONDEMAND_YES || (d->do_qops == CONFIG_ONDEMAND_ONDEMAND && queued_ios)) { d->do_qops = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_qops", disk); if(!st) { st = rrdset_create("disk_qops", disk, NULL, family, "disk.qops", "Disk Current I/O Operations", "operations", 2002, update_every, RRDSET_TYPE_LINE); st->isdetail = 1; rrddim_add(st, "operations", NULL, 1, 1, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "operations", queued_ios); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_backlog == CONFIG_ONDEMAND_YES || (d->do_backlog == CONFIG_ONDEMAND_ONDEMAND && backlog_ms)) { d->do_backlog = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_backlog", disk); if(!st) { st = rrdset_create("disk_backlog", disk, NULL, family, "disk.backlog", "Disk Backlog", "backlog (ms)", 2003, update_every, RRDSET_TYPE_AREA); st->isdetail = 1; rrddim_add(st, "backlog", NULL, 1, 10, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); rrddim_set(st, "backlog", backlog_ms); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_util == CONFIG_ONDEMAND_YES || (d->do_util == CONFIG_ONDEMAND_ONDEMAND && busy_ms)) { d->do_util = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_util", disk); if(!st) { st = rrdset_create("disk_util", disk, NULL, family, "disk.util", "Disk Utilization Time", "% of time working", 2004, update_every, RRDSET_TYPE_AREA); st->isdetail = 1; rrddim_add(st, "utilization", NULL, 1, 10, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); last_busy_ms = rrddim_set(st, "utilization", busy_ms); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_mops == CONFIG_ONDEMAND_YES || (d->do_mops == CONFIG_ONDEMAND_ONDEMAND && (mreads || mwrites))) { d->do_mops = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_mops", disk); if(!st) { st = rrdset_create("disk_mops", disk, NULL, family, "disk.mops", "Disk Merged Operations", "merged operations/s", 2021, update_every, RRDSET_TYPE_LINE); st->isdetail = 1; rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL); rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); rrddim_set(st, "reads", mreads); rrddim_set(st, "writes", mwrites); rrdset_done(st); } // -------------------------------------------------------------------- if(d->do_iotime == CONFIG_ONDEMAND_YES || (d->do_iotime == CONFIG_ONDEMAND_ONDEMAND && (readms || writems))) { d->do_iotime = CONFIG_ONDEMAND_YES; st = rrdset_find_bytype("disk_iotime", disk); if(!st) { st = rrdset_create("disk_iotime", disk, NULL, family, "disk.iotime", "Disk Total I/O Time", "milliseconds/s", 2022, update_every, RRDSET_TYPE_LINE); st->isdetail = 1; rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_INCREMENTAL); rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_INCREMENTAL); } else rrdset_next_usec(st, dt); last_readms = rrddim_set(st, "reads", readms); last_writems = rrddim_set(st, "writes", writems); rrdset_done(st); } // -------------------------------------------------------------------- // calculate differential charts // only if this is not the first time we run if(dt) { if( (d->do_iotime == CONFIG_ONDEMAND_YES || (d->do_iotime == CONFIG_ONDEMAND_ONDEMAND && (readms || writems))) && (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) { st = rrdset_find_bytype("disk_await", disk); if(!st) { 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); st->isdetail = 1; rrddim_add(st, "reads", NULL, 1, 1, RRDDIM_ABSOLUTE); rrddim_add(st, "writes", NULL, -1, 1, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "reads", (reads - last_reads) ? (readms - last_readms) / (reads - last_reads) : 0); rrddim_set(st, "writes", (writes - last_writes) ? (writems - last_writems) / (writes - last_writes) : 0); rrdset_done(st); } if( (d->do_io == CONFIG_ONDEMAND_YES || (d->do_io == CONFIG_ONDEMAND_ONDEMAND && (readsectors || writesectors))) && (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) { st = rrdset_find_bytype("disk_avgsz", disk); if(!st) { 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); st->isdetail = 1; rrddim_add(st, "reads", NULL, d->sector_size, 1024, RRDDIM_ABSOLUTE); rrddim_add(st, "writes", NULL, d->sector_size * -1, 1024, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "reads", (reads - last_reads) ? (readsectors - last_readsectors) / (reads - last_reads) : 0); rrddim_set(st, "writes", (writes - last_writes) ? (writesectors - last_writesectors) / (writes - last_writes) : 0); rrdset_done(st); } if( (d->do_util == CONFIG_ONDEMAND_YES || (d->do_util == CONFIG_ONDEMAND_ONDEMAND && busy_ms)) && (d->do_ops == CONFIG_ONDEMAND_YES || (d->do_ops == CONFIG_ONDEMAND_ONDEMAND && (reads || writes)))) { st = rrdset_find_bytype("disk_svctm", disk); if(!st) { st = rrdset_create("disk_svctm", disk, NULL, family, "disk.svctm", "Average Service Time", "ms per operation", 2007, update_every, RRDSET_TYPE_LINE); st->isdetail = 1; rrddim_add(st, "svctm", NULL, 1, 1, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "svctm", ((reads - last_reads) + (writes - last_writes)) ? (busy_ms - last_busy_ms) / ((reads - last_reads) + (writes - last_writes)) : 0); rrdset_done(st); } } // -------------------------------------------------------------------------- // space metrics if(d->mount_point && (d->do_space || d->do_inodes) ) { // collect space metrics using statvfs if (statvfs(d->mount_point, &buff_statvfs) < 0) error("Failed statvfs() for '%s' (disk '%s')", d->mount_point, d->disk); else { space_avail = buff_statvfs.f_bavail * buff_statvfs.f_bsize; space_avail_root = (buff_statvfs.f_bfree - buff_statvfs.f_bavail) * buff_statvfs.f_bsize; space_used = (buff_statvfs.f_blocks - buff_statvfs.f_bfree) * buff_statvfs.f_bsize; inodes_avail = buff_statvfs.f_favail; inodes_avail_root = buff_statvfs.f_ffree - buff_statvfs.f_favail; inodes_used = buff_statvfs.f_files - buff_statvfs.f_ffree; // verify we collected the metrics for the right disk. // if not the mountpoint has changed. if(stat(d->mount_point, &buff_stat) == -1) error("Failed to stat() for '%s' (disk '%s')", d->mount_point, d->disk); else { if(major(buff_stat.st_dev) == major && minor(buff_stat.st_dev) == minor) { // -------------------------------------------------------------------------- if(d->do_space == CONFIG_ONDEMAND_YES || (d->do_space == CONFIG_ONDEMAND_ONDEMAND && (space_avail || space_avail_root || space_used))) { st = rrdset_find_bytype("disk_space", disk); if(!st) { st = rrdset_create("disk_space", disk, NULL, family, "disk.space", "Disk Space Usage", "GB", 2023, update_every, RRDSET_TYPE_STACKED); st->isdetail = 1; rrddim_add(st, "avail", NULL, 1, 1024*1024*1024, RRDDIM_ABSOLUTE); rrddim_add(st, "used" , NULL, 1, 1024*1024*1024, RRDDIM_ABSOLUTE); rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1024*1024*1024, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "avail", space_avail); rrddim_set(st, "used", space_used); rrddim_set(st, "reserved_for_root", space_avail_root); rrdset_done(st); } // -------------------------------------------------------------------------- if(d->do_inodes == CONFIG_ONDEMAND_YES || (d->do_inodes == CONFIG_ONDEMAND_ONDEMAND && (inodes_avail || inodes_avail_root || inodes_used))) { st = rrdset_find_bytype("disk_inodes", disk); if(!st) { st = rrdset_create("disk_inodes", disk, NULL, family, "disk.inodes", "Disk Inodes Usage", "Inodes", 2024, update_every, RRDSET_TYPE_STACKED); st->isdetail = 1; rrddim_add(st, "avail", NULL, 1, 1, RRDDIM_ABSOLUTE); rrddim_add(st, "used" , NULL, 1, 1, RRDDIM_ABSOLUTE); rrddim_add(st, "reserved_for_root", "reserved for root", 1, 1, RRDDIM_ABSOLUTE); } else rrdset_next_usec(st, dt); rrddim_set(st, "avail", inodes_avail); rrddim_set(st, "used", inodes_used); rrddim_set(st, "reserved_for_root", inodes_avail_root); rrdset_done(st); } } } } } } return 0; }