static int disk_read (void)
{
#if HAVE_IOKIT_IOKITLIB_H
io_registry_entry_t disk;
io_registry_entry_t disk_child;
io_iterator_t disk_list;
CFDictionaryRef props_dict;
CFDictionaryRef stats_dict;
CFDictionaryRef child_dict;
CFStringRef tmp_cf_string_ref;
kern_return_t status;
signed long long read_ops;
signed long long read_byt;
signed long long read_tme;
signed long long write_ops;
signed long long write_byt;
signed long long write_tme;
int disk_major;
int disk_minor;
char disk_name[DATA_MAX_NAME_LEN];
char disk_name_bsd[DATA_MAX_NAME_LEN];
/* Get the list of all disk objects. */
if (IOServiceGetMatchingServices (io_master_port,
IOServiceMatching (kIOBlockStorageDriverClass),
&disk_list) != kIOReturnSuccess)
{
ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
return (-1);
}
while ((disk = IOIteratorNext (disk_list)) != 0)
{
props_dict = NULL;
stats_dict = NULL;
child_dict = NULL;
/* `disk_child' must be released */
if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child))
!= kIOReturnSuccess)
{
/* This fails for example for DVD/CD drives.. */
DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
IOObjectRelease (disk);
continue;
}
/* We create `props_dict' => we need to release it later */
if (IORegistryEntryCreateCFProperties (disk,
(CFMutableDictionaryRef *) &props_dict,
kCFAllocatorDefault,
kNilOptions)
!= kIOReturnSuccess)
{
ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
if (props_dict == NULL)
{
DEBUG ("IORegistryEntryCreateCFProperties (disk) failed.");
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
/* tmp_cf_string_ref doesn't need to be released. */
tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict,
CFSTR(kIOBSDNameKey));
if (!tmp_cf_string_ref)
{
DEBUG ("disk plugin: CFDictionaryGetValue("
"kIOBSDNameKey) failed.");
CFRelease (props_dict);
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
memset (disk_name_bsd, 0, sizeof (disk_name_bsd));
CFStringGetCString (tmp_cf_string_ref,
disk_name_bsd, sizeof (disk_name_bsd),
kCFStringEncodingUTF8);
if (disk_name_bsd[0] == 0)
{
ERROR ("disk plugin: CFStringGetCString() failed.");
CFRelease (props_dict);
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
DEBUG ("disk plugin: disk_name_bsd = \"%s\"", disk_name_bsd);
stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict,
CFSTR (kIOBlockStorageDriverStatisticsKey));
if (stats_dict == NULL)
{
DEBUG ("disk plugin: CFDictionaryGetValue ("
"%s) failed.",
kIOBlockStorageDriverStatisticsKey);
CFRelease (props_dict);
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
if (IORegistryEntryCreateCFProperties (disk_child,
(CFMutableDictionaryRef *) &child_dict,
kCFAllocatorDefault,
kNilOptions)
!= kIOReturnSuccess)
{
DEBUG ("disk plugin: IORegistryEntryCreateCFProperties ("
"disk_child) failed.");
IOObjectRelease (disk_child);
CFRelease (props_dict);
IOObjectRelease (disk);
continue;
}
/* kIOBSDNameKey */
disk_major = (int) dict_get_value (child_dict,
kIOBSDMajorKey);
disk_minor = (int) dict_get_value (child_dict,
kIOBSDMinorKey);
read_ops = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsReadsKey);
read_byt = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsBytesReadKey);
read_tme = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsTotalReadTimeKey);
write_ops = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsWritesKey);
write_byt = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsBytesWrittenKey);
/* This property describes the number of nanoseconds spent
* performing writes since the block storage driver was
* instantiated. It is one of the statistic entries listed
* under the top-level kIOBlockStorageDriverStatisticsKey
* property table. It has an OSNumber value. */
write_tme = dict_get_value (stats_dict,
kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
if (use_bsd_name)
sstrncpy (disk_name, disk_name_bsd, sizeof (disk_name));
else
ssnprintf (disk_name, sizeof (disk_name), "%i-%i",
disk_major, disk_minor);
DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
if ((read_byt != -1LL) || (write_byt != -1LL))
disk_submit (disk_name, "disk_octets", read_byt, write_byt);
if ((read_ops != -1LL) || (write_ops != -1LL))
disk_submit (disk_name, "disk_ops", read_ops, write_ops);
if ((read_tme != -1LL) || (write_tme != -1LL))
disk_submit (disk_name, "disk_time",
read_tme / 1000,
write_tme / 1000);
CFRelease (child_dict);
IOObjectRelease (disk_child);
CFRelease (props_dict);
IOObjectRelease (disk);
}
IOObjectRelease (disk_list);
/* #endif HAVE_IOKIT_IOKITLIB_H */
#elif KERNEL_LINUX
FILE *fh;
char buffer[1024];
char *fields[32];
int numfields;
int fieldshift = 0;
int minor = 0;
derive_t read_sectors = 0;
derive_t write_sectors = 0;
derive_t read_ops = 0;
derive_t read_merged = 0;
derive_t read_time = 0;
derive_t write_ops = 0;
derive_t write_merged = 0;
derive_t write_time = 0;
gauge_t in_progress = NAN;
int is_disk = 0;
diskstats_t *ds, *pre_ds;
if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
{
fh = fopen ("/proc/partitions", "r");
if (fh == NULL)
{
ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
return (-1);
}
/* Kernel is 2.4.* */
fieldshift = 1;
}
#if HAVE_LIBUDEV
handle_udev = udev_new();
#endif
while (fgets (buffer, sizeof (buffer), fh) != NULL)
{
char *disk_name;
char *output_name;
char *alt_name;
numfields = strsplit (buffer, fields, 32);
if ((numfields != (14 + fieldshift)) && (numfields != 7))
continue;
minor = atoll (fields[1]);
disk_name = fields[2 + fieldshift];
for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
if (strcmp (disk_name, ds->name) == 0)
break;
if (ds == NULL)
{
if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
continue;
if ((ds->name = strdup (disk_name)) == NULL)
{
free (ds);
continue;
}
if (pre_ds == NULL)
disklist = ds;
else
pre_ds->next = ds;
}
is_disk = 0;
if (numfields == 7)
{
/* Kernel 2.6, Partition */
read_ops = atoll (fields[3]);
read_sectors = atoll (fields[4]);
write_ops = atoll (fields[5]);
write_sectors = atoll (fields[6]);
}
else if (numfields == (14 + fieldshift))
{
read_ops = atoll (fields[3 + fieldshift]);
write_ops = atoll (fields[7 + fieldshift]);
read_sectors = atoll (fields[5 + fieldshift]);
write_sectors = atoll (fields[9 + fieldshift]);
if ((fieldshift == 0) || (minor == 0))
{
is_disk = 1;
read_merged = atoll (fields[4 + fieldshift]);
read_time = atoll (fields[6 + fieldshift]);
write_merged = atoll (fields[8 + fieldshift]);
write_time = atoll (fields[10+ fieldshift]);
in_progress = atof (fields[11 + fieldshift]);
}
}
else
{
DEBUG ("numfields = %i; => unknown file format.", numfields);
continue;
}
{
derive_t diff_read_sectors;
derive_t diff_write_sectors;
/* If the counter wraps around, it's only 32 bits.. */
if (read_sectors < ds->read_sectors)
diff_read_sectors = 1 + read_sectors
+ (UINT_MAX - ds->read_sectors);
else
diff_read_sectors = read_sectors - ds->read_sectors;
if (write_sectors < ds->write_sectors)
diff_write_sectors = 1 + write_sectors
+ (UINT_MAX - ds->write_sectors);
else
diff_write_sectors = write_sectors - ds->write_sectors;
ds->read_bytes += 512 * diff_read_sectors;
ds->write_bytes += 512 * diff_write_sectors;
ds->read_sectors = read_sectors;
ds->write_sectors = write_sectors;
}
/* Calculate the average time an io-op needs to complete */
if (is_disk)
{
derive_t diff_read_ops;
derive_t diff_write_ops;
derive_t diff_read_time;
derive_t diff_write_time;
if (read_ops < ds->read_ops)
diff_read_ops = 1 + read_ops
+ (UINT_MAX - ds->read_ops);
else
diff_read_ops = read_ops - ds->read_ops;
DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
"ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
disk_name,
read_ops, ds->read_ops, diff_read_ops);
if (write_ops < ds->write_ops)
diff_write_ops = 1 + write_ops
+ (UINT_MAX - ds->write_ops);
else
diff_write_ops = write_ops - ds->write_ops;
if (read_time < ds->read_time)
diff_read_time = 1 + read_time
+ (UINT_MAX - ds->read_time);
else
diff_read_time = read_time - ds->read_time;
if (write_time < ds->write_time)
diff_write_time = 1 + write_time
+ (UINT_MAX - ds->write_time);
else
diff_write_time = write_time - ds->write_time;
if (diff_read_ops != 0)
ds->avg_read_time += disk_calc_time_incr (
diff_read_time, diff_read_ops);
if (diff_write_ops != 0)
ds->avg_write_time += disk_calc_time_incr (
diff_write_time, diff_write_ops);
ds->read_ops = read_ops;
ds->read_time = read_time;
ds->write_ops = write_ops;
ds->write_time = write_time;
} /* if (is_disk) */
/* Don't write to the RRDs if we've just started.. */
ds->poll_count++;
if (ds->poll_count <= 2)
{
DEBUG ("disk plugin: (ds->poll_count = %i) <= "
"(min_poll_count = 2); => Not writing.",
ds->poll_count);
continue;
}
if ((read_ops == 0) && (write_ops == 0))
{
DEBUG ("disk plugin: ((read_ops == 0) && "
"(write_ops == 0)); => Not writing.");
continue;
}
output_name = disk_name;
#if HAVE_LIBUDEV
alt_name = disk_udev_attr_name (handle_udev, disk_name,
conf_udev_name_attr);
#else
alt_name = NULL;
#endif
if (alt_name != NULL)
output_name = alt_name;
if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
disk_submit (output_name, "disk_octets",
ds->read_bytes, ds->write_bytes);
if ((ds->read_ops != 0) || (ds->write_ops != 0))
disk_submit (output_name, "disk_ops",
read_ops, write_ops);
if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
disk_submit (output_name, "disk_time",
ds->avg_read_time, ds->avg_write_time);
if (is_disk)
{
disk_submit (output_name, "disk_merged",
read_merged, write_merged);
submit_in_progress (output_name, in_progress);
} /* if (is_disk) */
/* release udev-based alternate name, if allocated */
free(alt_name);
} /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
#if HAVE_LIBUDEV
udev_unref(handle_udev);
#endif
fclose (fh);
/* #endif defined(KERNEL_LINUX) */
#elif HAVE_LIBKSTAT
# if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
# define KIO_ROCTETS reads
# define KIO_WOCTETS writes
# define KIO_ROPS nreads
# define KIO_WOPS nwrites
# define KIO_RTIME rtime
# define KIO_WTIME wtime
# elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
# define KIO_ROCTETS nread
# define KIO_WOCTETS nwritten
# define KIO_ROPS reads
# define KIO_WOPS writes
# define KIO_RTIME rtime
# define KIO_WTIME wtime
# else
# error "kstat_io_t does not have the required members"
# endif
static kstat_io_t kio;
int i;
if (kc == NULL)
return (-1);
for (i = 0; i < numdisk; i++)
{
if (kstat_read (kc, ksp[i], &kio) == -1)
continue;
if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
{
disk_submit (ksp[i]->ks_name, "disk_octets",
kio.KIO_ROCTETS, kio.KIO_WOCTETS);
disk_submit (ksp[i]->ks_name, "disk_ops",
kio.KIO_ROPS, kio.KIO_WOPS);
/* FIXME: Convert this to microseconds if necessary */
disk_submit (ksp[i]->ks_name, "disk_time",
kio.KIO_RTIME, kio.KIO_WTIME);
}
else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
{
disk_submit (ksp[i]->ks_name, "disk_octets",
kio.KIO_ROCTETS, kio.KIO_WOCTETS);
disk_submit (ksp[i]->ks_name, "disk_ops",
kio.KIO_ROPS, kio.KIO_WOPS);
}
}
/* #endif defined(HAVE_LIBKSTAT) */
#elif defined(HAVE_LIBSTATGRAB)
sg_disk_io_stats *ds;
# if HAVE_LIBSTATGRAB_0_90
size_t disks;
# else
int disks;
#endif
int counter;
char name[DATA_MAX_NAME_LEN];
if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
return (0);
for (counter=0; counter < disks; counter++) {
strncpy(name, ds->disk_name, sizeof(name));
name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
ds++;
}
/* #endif defined(HAVE_LIBSTATGRAB) */
#elif defined(HAVE_PERFSTAT)
derive_t read_sectors;
derive_t write_sectors;
derive_t read_time;
derive_t write_time;
derive_t read_ops;
derive_t write_ops;
perfstat_id_t firstpath;
int rnumdisk;
int i;
if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
{
char errbuf[1024];
WARNING ("disk plugin: perfstat_disk: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
if (numdisk != pnumdisk || stat_disk==NULL) {
if (stat_disk!=NULL)
free(stat_disk);
stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
}
pnumdisk = numdisk;
firstpath.name[0]='\0';
if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
{
char errbuf[1024];
WARNING ("disk plugin: perfstat_disk : %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
for (i = 0; i < rnumdisk; i++)
{
read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
read_ops = stat_disk[i].xrate;
write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
read_time = stat_disk[i].rserv;
read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
write_time = stat_disk[i].wserv;
write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
}
#endif /* defined(HAVE_PERFSTAT) */
return (0);
} /* int disk_read */
static int disk_read (void)
{
#if HAVE_IOKIT_IOKITLIB_H
io_registry_entry_t disk;
io_registry_entry_t disk_child;
io_iterator_t disk_list;
CFMutableDictionaryRef props_dict, child_dict;
CFDictionaryRef stats_dict;
CFStringRef tmp_cf_string_ref;
kern_return_t status;
signed long long read_ops, read_byt, read_tme;
signed long long write_ops, write_byt, write_tme;
int disk_major, disk_minor;
char disk_name[DATA_MAX_NAME_LEN];
char child_disk_name_bsd[DATA_MAX_NAME_LEN], props_disk_name_bsd[DATA_MAX_NAME_LEN];
/* Get the list of all disk objects. */
if (IOServiceGetMatchingServices (io_master_port, IOServiceMatching (kIOBlockStorageDriverClass), &disk_list) != kIOReturnSuccess) {
ERROR ("disk plugin: IOServiceGetMatchingServices failed.");
return (-1);
}
while ((disk = IOIteratorNext (disk_list)) != 0) {
props_dict = NULL;
stats_dict = NULL;
child_dict = NULL;
/* get child of disk entry and corresponding property dictionary */
if ((status = IORegistryEntryGetChildEntry (disk, kIOServicePlane, &disk_child)) != kIOReturnSuccess) {
/* This fails for example for DVD/CD drives, which we want to ignore anyway */
DEBUG ("IORegistryEntryGetChildEntry (disk) failed: 0x%08x", status);
IOObjectRelease (disk);
continue;
}
if (IORegistryEntryCreateCFProperties (disk_child, (CFMutableDictionaryRef *) &child_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || child_dict == NULL) {
ERROR ("disk plugin: IORegistryEntryCreateCFProperties (disk_child) failed.");
IOObjectRelease (disk_child);
IOObjectRelease (disk);
continue;
}
/* extract name and major/minor numbers */
memset (child_disk_name_bsd, 0, sizeof (child_disk_name_bsd));
tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (child_dict, CFSTR(kIOBSDNameKey));
if (tmp_cf_string_ref) {
assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
CFStringGetCString (tmp_cf_string_ref, child_disk_name_bsd, sizeof (child_disk_name_bsd), kCFStringEncodingUTF8);
}
disk_major = (int) dict_get_value (child_dict, kIOBSDMajorKey);
disk_minor = (int) dict_get_value (child_dict, kIOBSDMinorKey);
DEBUG ("disk plugin: child_disk_name_bsd=\"%s\" major=%d minor=%d", child_disk_name_bsd, disk_major, disk_minor);
CFRelease (child_dict);
IOObjectRelease (disk_child);
/* get property dictionary of the disk entry itself */
if (IORegistryEntryCreateCFProperties (disk, (CFMutableDictionaryRef *) &props_dict, kCFAllocatorDefault, kNilOptions) != kIOReturnSuccess || props_dict == NULL) {
ERROR ("disk-plugin: IORegistryEntryCreateCFProperties failed.");
IOObjectRelease (disk);
continue;
}
/* extract name and stats dictionary */
memset (props_disk_name_bsd, 0, sizeof (props_disk_name_bsd));
tmp_cf_string_ref = (CFStringRef) CFDictionaryGetValue (props_dict, CFSTR(kIOBSDNameKey));
if (tmp_cf_string_ref) {
assert (CFGetTypeID (tmp_cf_string_ref) == CFStringGetTypeID ());
CFStringGetCString (tmp_cf_string_ref, props_disk_name_bsd, sizeof (props_disk_name_bsd), kCFStringEncodingUTF8);
}
stats_dict = (CFDictionaryRef) CFDictionaryGetValue (props_dict, CFSTR (kIOBlockStorageDriverStatisticsKey));
if (stats_dict == NULL) {
ERROR ("disk plugin: CFDictionaryGetValue (%s) failed.", kIOBlockStorageDriverStatisticsKey);
CFRelease (props_dict);
IOObjectRelease (disk);
continue;
}
DEBUG ("disk plugin: props_disk_name_bsd=\"%s\"", props_disk_name_bsd);
/* choose name */
if (use_bsd_name) {
if (child_disk_name_bsd[0] != 0)
sstrncpy (disk_name, child_disk_name_bsd, sizeof (disk_name));
else if (props_disk_name_bsd[0] != 0)
sstrncpy (disk_name, props_disk_name_bsd, sizeof (disk_name));
else {
ERROR ("disk plugin: can't find bsd disk name.");
ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
}
}
else
ssnprintf (disk_name, sizeof (disk_name), "%i-%i", disk_major, disk_minor);
/* extract the stats */
read_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsReadsKey);
read_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesReadKey);
read_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalReadTimeKey);
write_ops = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsWritesKey);
write_byt = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsBytesWrittenKey);
write_tme = dict_get_value (stats_dict, kIOBlockStorageDriverStatisticsTotalWriteTimeKey);
CFRelease (props_dict);
IOObjectRelease (disk);
/* and submit */
DEBUG ("disk plugin: disk_name = \"%s\"", disk_name);
if ((read_byt != -1LL) || (write_byt != -1LL))
disk_submit (disk_name, "disk_octets", read_byt, write_byt);
if ((read_ops != -1LL) || (write_ops != -1LL))
disk_submit (disk_name, "disk_ops", read_ops, write_ops);
if ((read_tme != -1LL) || (write_tme != -1LL))
disk_submit (disk_name, "disk_time", read_tme / 1000, write_tme / 1000);
}
IOObjectRelease (disk_list);
/* #endif HAVE_IOKIT_IOKITLIB_H */
#elif KERNEL_FREEBSD
int retry, dirty;
void *snap = NULL;
struct devstat *snap_iter;
struct gident *geom_id;
const char *disk_name;
long double read_time, write_time;
for (retry = 0, dirty = 1; retry < 5 && dirty == 1; retry++) {
if (snap != NULL)
geom_stats_snapshot_free(snap);
/* Get a fresh copy of stats snapshot */
snap = geom_stats_snapshot_get();
if (snap == NULL) {
ERROR("disk plugin: geom_stats_snapshot_get() failed.");
return (-1);
}
/* Check if we have dirty read from this snapshot */
dirty = 0;
geom_stats_snapshot_reset(snap);
while ((snap_iter = geom_stats_snapshot_next(snap)) != NULL) {
if (snap_iter->id == NULL)
continue;
geom_id = geom_lookupid(&geom_tree, snap_iter->id);
/* New device? refresh GEOM tree */
if (geom_id == NULL) {
geom_deletetree(&geom_tree);
if (geom_gettree(&geom_tree) != 0) {
ERROR("disk plugin: geom_gettree() failed");
geom_stats_snapshot_free(snap);
return (-1);
}
geom_id = geom_lookupid(&geom_tree, snap_iter->id);
}
/*
* This should be rare: the device come right before we take the
* snapshot and went away right after it. We will handle this
* case later, so don't mark dirty but silently ignore it.
*/
if (geom_id == NULL)
continue;
/* Only collect PROVIDER data */
if (geom_id->lg_what != ISPROVIDER)
continue;
/* Only collect data when rank is 1 (physical devices) */
if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
continue;
/* Check if this is a dirty read quit for another try */
if (snap_iter->sequence0 != snap_iter->sequence1) {
dirty = 1;
break;
}
}
}
/* Reset iterator */
geom_stats_snapshot_reset(snap);
for (;;) {
snap_iter = geom_stats_snapshot_next(snap);
if (snap_iter == NULL)
break;
if (snap_iter->id == NULL)
continue;
geom_id = geom_lookupid(&geom_tree, snap_iter->id);
if (geom_id == NULL)
continue;
if (geom_id->lg_what != ISPROVIDER)
continue;
if (((struct gprovider *)(geom_id->lg_ptr))->lg_geom->lg_rank != 1)
continue;
/* Skip dirty reads, if present */
if (dirty && (snap_iter->sequence0 != snap_iter->sequence1))
continue;
disk_name = ((struct gprovider *)geom_id->lg_ptr)->lg_name;
if ((snap_iter->bytes[DEVSTAT_READ] != 0) || (snap_iter->bytes[DEVSTAT_WRITE] != 0)) {
disk_submit(disk_name, "disk_octets",
(derive_t)snap_iter->bytes[DEVSTAT_READ],
(derive_t)snap_iter->bytes[DEVSTAT_WRITE]);
}
if ((snap_iter->operations[DEVSTAT_READ] != 0) || (snap_iter->operations[DEVSTAT_WRITE] != 0)) {
disk_submit(disk_name, "disk_ops",
(derive_t)snap_iter->operations[DEVSTAT_READ],
(derive_t)snap_iter->operations[DEVSTAT_WRITE]);
}
read_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_READ], NULL);
write_time = devstat_compute_etime(&snap_iter->duration[DEVSTAT_WRITE], NULL);
if ((read_time != 0) || (write_time != 0)) {
disk_submit (disk_name, "disk_time",
(derive_t)(read_time*1000), (derive_t)(write_time*1000));
}
}
geom_stats_snapshot_free(snap);
#elif KERNEL_LINUX
FILE *fh;
char buffer[1024];
char *fields[32];
int numfields;
int fieldshift = 0;
int minor = 0;
derive_t read_sectors = 0;
derive_t write_sectors = 0;
derive_t read_ops = 0;
derive_t read_merged = 0;
derive_t read_time = 0;
derive_t write_ops = 0;
derive_t write_merged = 0;
derive_t write_time = 0;
gauge_t in_progress = NAN;
derive_t io_time = 0;
derive_t weighted_time = 0;
int is_disk = 0;
diskstats_t *ds, *pre_ds;
if ((fh = fopen ("/proc/diskstats", "r")) == NULL)
{
fh = fopen ("/proc/partitions", "r");
if (fh == NULL)
{
ERROR ("disk plugin: fopen (/proc/{diskstats,partitions}) failed.");
return (-1);
}
/* Kernel is 2.4.* */
fieldshift = 1;
}
#if HAVE_LIBUDEV
handle_udev = udev_new();
#endif
while (fgets (buffer, sizeof (buffer), fh) != NULL)
{
char *disk_name;
char *output_name;
numfields = strsplit (buffer, fields, 32);
if ((numfields != (14 + fieldshift)) && (numfields != 7))
continue;
minor = atoll (fields[1]);
disk_name = fields[2 + fieldshift];
for (ds = disklist, pre_ds = disklist; ds != NULL; pre_ds = ds, ds = ds->next)
if (strcmp (disk_name, ds->name) == 0)
break;
if (ds == NULL)
{
if ((ds = (diskstats_t *) calloc (1, sizeof (diskstats_t))) == NULL)
continue;
if ((ds->name = strdup (disk_name)) == NULL)
{
free (ds);
continue;
}
if (pre_ds == NULL)
disklist = ds;
else
pre_ds->next = ds;
}
is_disk = 0;
if (numfields == 7)
{
/* Kernel 2.6, Partition */
read_ops = atoll (fields[3]);
read_sectors = atoll (fields[4]);
write_ops = atoll (fields[5]);
write_sectors = atoll (fields[6]);
}
else if (numfields == (14 + fieldshift))
{
read_ops = atoll (fields[3 + fieldshift]);
write_ops = atoll (fields[7 + fieldshift]);
read_sectors = atoll (fields[5 + fieldshift]);
write_sectors = atoll (fields[9 + fieldshift]);
if ((fieldshift == 0) || (minor == 0))
{
is_disk = 1;
read_merged = atoll (fields[4 + fieldshift]);
read_time = atoll (fields[6 + fieldshift]);
write_merged = atoll (fields[8 + fieldshift]);
write_time = atoll (fields[10+ fieldshift]);
in_progress = atof (fields[11 + fieldshift]);
io_time = atof (fields[12 + fieldshift]);
weighted_time = atof (fields[13 + fieldshift]);
}
}
else
{
DEBUG ("numfields = %i; => unknown file format.", numfields);
continue;
}
{
derive_t diff_read_sectors;
derive_t diff_write_sectors;
/* If the counter wraps around, it's only 32 bits.. */
if (read_sectors < ds->read_sectors)
diff_read_sectors = 1 + read_sectors
+ (UINT_MAX - ds->read_sectors);
else
diff_read_sectors = read_sectors - ds->read_sectors;
if (write_sectors < ds->write_sectors)
diff_write_sectors = 1 + write_sectors
+ (UINT_MAX - ds->write_sectors);
else
diff_write_sectors = write_sectors - ds->write_sectors;
ds->read_bytes += 512 * diff_read_sectors;
ds->write_bytes += 512 * diff_write_sectors;
ds->read_sectors = read_sectors;
ds->write_sectors = write_sectors;
}
/* Calculate the average time an io-op needs to complete */
if (is_disk)
{
derive_t diff_read_ops;
derive_t diff_write_ops;
derive_t diff_read_time;
derive_t diff_write_time;
if (read_ops < ds->read_ops)
diff_read_ops = 1 + read_ops
+ (UINT_MAX - ds->read_ops);
else
diff_read_ops = read_ops - ds->read_ops;
DEBUG ("disk plugin: disk_name = %s; read_ops = %"PRIi64"; "
"ds->read_ops = %"PRIi64"; diff_read_ops = %"PRIi64";",
disk_name,
read_ops, ds->read_ops, diff_read_ops);
if (write_ops < ds->write_ops)
diff_write_ops = 1 + write_ops
+ (UINT_MAX - ds->write_ops);
else
diff_write_ops = write_ops - ds->write_ops;
if (read_time < ds->read_time)
diff_read_time = 1 + read_time
+ (UINT_MAX - ds->read_time);
else
diff_read_time = read_time - ds->read_time;
if (write_time < ds->write_time)
diff_write_time = 1 + write_time
+ (UINT_MAX - ds->write_time);
else
diff_write_time = write_time - ds->write_time;
if (diff_read_ops != 0)
ds->avg_read_time += disk_calc_time_incr (
diff_read_time, diff_read_ops);
if (diff_write_ops != 0)
ds->avg_write_time += disk_calc_time_incr (
diff_write_time, diff_write_ops);
ds->read_ops = read_ops;
ds->read_time = read_time;
ds->write_ops = write_ops;
ds->write_time = write_time;
} /* if (is_disk) */
/* Don't write to the RRDs if we've just started.. */
ds->poll_count++;
if (ds->poll_count <= 2)
{
DEBUG ("disk plugin: (ds->poll_count = %i) <= "
"(min_poll_count = 2); => Not writing.",
ds->poll_count);
continue;
}
if ((read_ops == 0) && (write_ops == 0))
{
DEBUG ("disk plugin: ((read_ops == 0) && "
"(write_ops == 0)); => Not writing.");
continue;
}
output_name = disk_name;
#if HAVE_LIBUDEV
char *alt_name = disk_udev_attr_name (handle_udev, disk_name, conf_udev_name_attr);
if (alt_name != NULL)
output_name = alt_name;
#endif
if ((ds->read_bytes != 0) || (ds->write_bytes != 0))
disk_submit (output_name, "disk_octets",
ds->read_bytes, ds->write_bytes);
if ((ds->read_ops != 0) || (ds->write_ops != 0))
disk_submit (output_name, "disk_ops",
read_ops, write_ops);
if ((ds->avg_read_time != 0) || (ds->avg_write_time != 0))
disk_submit (output_name, "disk_time",
ds->avg_read_time, ds->avg_write_time);
if (is_disk)
{
disk_submit (output_name, "disk_merged",
read_merged, write_merged);
submit_in_progress (output_name, in_progress);
submit_io_time (output_name, io_time, weighted_time);
} /* if (is_disk) */
#if HAVE_LIBUDEV
/* release udev-based alternate name, if allocated */
sfree (alt_name);
#endif
} /* while (fgets (buffer, sizeof (buffer), fh) != NULL) */
#if HAVE_LIBUDEV
udev_unref(handle_udev);
#endif
fclose (fh);
/* #endif defined(KERNEL_LINUX) */
#elif HAVE_LIBKSTAT
# if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
# define KIO_ROCTETS reads
# define KIO_WOCTETS writes
# define KIO_ROPS nreads
# define KIO_WOPS nwrites
# define KIO_RTIME rtime
# define KIO_WTIME wtime
# elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
# define KIO_ROCTETS nread
# define KIO_WOCTETS nwritten
# define KIO_ROPS reads
# define KIO_WOPS writes
# define KIO_RTIME rtime
# define KIO_WTIME wtime
# else
# error "kstat_io_t does not have the required members"
# endif
static kstat_io_t kio;
int i;
if (kc == NULL)
return (-1);
for (i = 0; i < numdisk; i++)
{
if (kstat_read (kc, ksp[i], &kio) == -1)
continue;
if (strncmp (ksp[i]->ks_class, "disk", 4) == 0)
{
disk_submit (ksp[i]->ks_name, "disk_octets",
kio.KIO_ROCTETS, kio.KIO_WOCTETS);
disk_submit (ksp[i]->ks_name, "disk_ops",
kio.KIO_ROPS, kio.KIO_WOPS);
/* FIXME: Convert this to microseconds if necessary */
disk_submit (ksp[i]->ks_name, "disk_time",
kio.KIO_RTIME, kio.KIO_WTIME);
}
else if (strncmp (ksp[i]->ks_class, "partition", 9) == 0)
{
disk_submit (ksp[i]->ks_name, "disk_octets",
kio.KIO_ROCTETS, kio.KIO_WOCTETS);
disk_submit (ksp[i]->ks_name, "disk_ops",
kio.KIO_ROPS, kio.KIO_WOPS);
}
}
/* #endif defined(HAVE_LIBKSTAT) */
#elif defined(HAVE_LIBSTATGRAB)
sg_disk_io_stats *ds;
# if HAVE_LIBSTATGRAB_0_90
size_t disks;
# else
int disks;
#endif
int counter;
char name[DATA_MAX_NAME_LEN];
if ((ds = sg_get_disk_io_stats(&disks)) == NULL)
return (0);
for (counter=0; counter < disks; counter++) {
strncpy(name, ds->disk_name, sizeof(name));
name[sizeof(name)-1] = '\0'; /* strncpy doesn't terminate longer strings */
disk_submit (name, "disk_octets", ds->read_bytes, ds->write_bytes);
ds++;
}
/* #endif defined(HAVE_LIBSTATGRAB) */
#elif defined(HAVE_PERFSTAT)
derive_t read_sectors;
derive_t write_sectors;
derive_t read_time;
derive_t write_time;
derive_t read_ops;
derive_t write_ops;
perfstat_id_t firstpath;
int rnumdisk;
int i;
if ((numdisk = perfstat_disk(NULL, NULL, sizeof(perfstat_disk_t), 0)) < 0)
{
char errbuf[1024];
WARNING ("disk plugin: perfstat_disk: %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
if (numdisk != pnumdisk || stat_disk==NULL) {
if (stat_disk!=NULL)
free(stat_disk);
stat_disk = (perfstat_disk_t *)calloc(numdisk, sizeof(perfstat_disk_t));
}
pnumdisk = numdisk;
firstpath.name[0]='\0';
if ((rnumdisk = perfstat_disk(&firstpath, stat_disk, sizeof(perfstat_disk_t), numdisk)) < 0)
{
char errbuf[1024];
WARNING ("disk plugin: perfstat_disk : %s",
sstrerror (errno, errbuf, sizeof (errbuf)));
return (-1);
}
for (i = 0; i < rnumdisk; i++)
{
read_sectors = stat_disk[i].rblks*stat_disk[i].bsize;
write_sectors = stat_disk[i].wblks*stat_disk[i].bsize;
disk_submit (stat_disk[i].name, "disk_octets", read_sectors, write_sectors);
read_ops = stat_disk[i].xrate;
write_ops = stat_disk[i].xfers - stat_disk[i].xrate;
disk_submit (stat_disk[i].name, "disk_ops", read_ops, write_ops);
read_time = stat_disk[i].rserv;
read_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
write_time = stat_disk[i].wserv;
write_time *= ((double)(_system_configuration.Xint)/(double)(_system_configuration.Xfrac)) / 1000000.0;
disk_submit (stat_disk[i].name, "disk_time", read_time, write_time);
}
#endif /* defined(HAVE_PERFSTAT) */
return (0);
} /* int disk_read */