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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
#include "log.h"
#include "appconfig.h"
#include "procfile.h"
#include "rrd.h"
#include "plugin_proc.h"
#define RRD_TYPE_DISK "disk"
int do_proc_diskstats(int update_every, unsigned long long dt) {
static procfile *ff = NULL;
static char path_to_get_hw_sector_size[FILENAME_MAX + 1] = "";
static int enable_new_disks = -1;
static int do_io = -1, do_ops = -1, do_mops = -1, do_iotime = -1, do_qops = -1, do_util = -1, do_backlog = -1;
if(enable_new_disks == -1) enable_new_disks = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "enable new disks detected at runtime", CONFIG_ONDEMAND_ONDEMAND);
if(do_io == -1) do_io = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "bandwidth for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_ops == -1) do_ops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_mops == -1) do_mops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "merged operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_iotime == -1) do_iotime = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "i/o time for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_qops == -1) do_qops = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "queued operations for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_util == -1) do_util = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "utilization percentage for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(do_backlog == -1)do_backlog = config_get_boolean_ondemand("plugin:proc:/proc/diskstats", "backlog for all disks", CONFIG_ONDEMAND_ONDEMAND);
if(!ff) {
char filename[FILENAME_MAX + 1];
snprintf(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;
if(!path_to_get_hw_sector_size[0]) {
char filename[FILENAME_MAX + 1];
snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/sys/block/%s/queue/hw_sector_size");
snprintf(path_to_get_hw_sector_size, FILENAME_MAX, "%s%s", global_host_prefix, config_get("plugin:proc:/proc/diskstats", "path to get h/w sector size", filename));
}
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++) {
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;
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
int def_enabled = 0;
// remove slashes from disk names
char *s;
for(s = disk; *s ;s++) if(*s == '/') *s = '_';
switch(major) {
case 9: // MDs
case 43: // network block
case 144: // nfs
case 145: // nfs
case 146: // nfs
case 199: // veritas
case 201: // veritas
case 251: // dm
def_enabled = enable_new_disks;
break;
case 48: // RAID
case 49: // RAID
case 50: // RAID
case 51: // RAID
case 52: // RAID
case 53: // RAID
case 54: // RAID
case 55: // RAID
case 112: // RAID
case 136: // RAID
case 137: // RAID
case 138: // RAID
case 139: // RAID
case 140: // RAID
case 141: // RAID
case 142: // RAID
case 143: // RAID
case 179:
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