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/*
* Unix SMB/CIFS implementation.
* Performance Counter Daemon
*
* Copyright (C) Marcin Krzysztof Porwit 2005
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "perf.h"
void init_diskdata_desc(PERF_DATA_BLOCK *data)
{
init_perf_counter(&(data->diskInfo.diskObjDesc),
&(data->diskInfo.diskObjDesc),
get_counter_id(data),
"Logical Disk",
"The Logical Disk object consists of counters that show information about disks.",
0,
PERF_OBJECT);
init_perf_counter(&(data->diskInfo.freeMegs),
&(data->diskInfo.diskObjDesc),
get_counter_id(data),
"Megabytes Free",
"The amount of available disk space, in megabytes.",
PERF_SIZE_LARGE | PERF_TYPE_NUMBER | PERF_NUMBER_DECIMAL | PERF_DISPLAY_NO_SUFFIX,
PERF_COUNTER);
init_perf_counter(&(data->diskInfo.writesPerSec),
&(data->diskInfo.diskObjDesc),
get_counter_id(data),
"Writes/sec",
"The number of writes per second to that disk.",
PERF_SIZE_DWORD | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_DELTA_COUNTER | PERF_DISPLAY_PER_SEC,
PERF_COUNTER);
init_perf_counter(&(data->diskInfo.readsPerSec),
&(data->diskInfo.diskObjDesc),
get_counter_id(data),
"Reads/sec",
"The number of reads of that disk per second.",
PERF_SIZE_DWORD | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_DELTA_COUNTER | PERF_DISPLAY_PER_SEC,
PERF_COUNTER);
return;
}
void init_num_disks(PERF_DATA_BLOCK *data)
{
FILE *mtab;
char buf[PROC_BUF];
char *start, *stop;
int i = 0, num;
if(!(mtab = fopen("/etc/mtab", "r")))
{
perror("init_disk_names: fopen");
exit(1);
}
rewind(mtab);
fflush(mtab);
while(fgets(buf, sizeof(buf), mtab))
{
if(start = strstr(buf, "/dev/"))
{
if(start = strstr(start, "da"))
{
i++;
}
}
}
data->diskInfo.numDisks = i;
fclose(mtab);
return;
}
void init_disk_names(PERF_DATA_BLOCK *data)
{
FILE *mtab;
char buf[PROC_BUF];
char *start, *stop;
int i = 0, num;
if(!(mtab = fopen("/etc/mtab", "r")))
{
perror("init_disk_names: fopen");
exit(1);
}
rewind(mtab);
fflush(mtab);
while(fgets(buf, sizeof(buf), mtab))
{
if(start = strstr(buf, "/dev/"))
{
if(start = strstr(start, "da"))
{
start -=1;
stop = strstr(start, " ");
memcpy(data->diskInfo.mdata[i].name, start, stop - start);
start = stop +1;
stop = strstr(start, " ");
memcpy(data->diskInfo.mdata[i].mountpoint, start, stop - start);
i++;
}
}
}
fclose(mtab);
return;
}
void get_diskinfo(PERF_DATA_BLOCK *data)
{
int i;
DiskData *p;
struct statfs statfsbuf;
int status, num;
char buf[LARGE_BUF], *start;
FILE *diskstats;
unsigned long reads, writes, discard;
diskstats = fopen("/proc/diskstats", "r");
rewind(diskstats);
fflush(diskstats);
status = fread(buf, sizeof(char), LARGE_BUF, diskstats);
fclose(diskstats);
for(i = 0; i < data->diskInfo.numDisks; i++)
{
p = &(data->diskInfo.data[i]);
status = statfs(data->diskInfo.mdata[i].mountpoint, &statfsbuf);
p->freeMegs = (statfsbuf.f_bfree*statfsbuf.f_bsize)/1048576;
start = strstr(buf, data->diskInfo.mdata[i].name);
start += strlen(data->diskInfo.mdata[i].name) + 1;
num = sscanf(start, "%lu %lu %lu %lu",
&reads,
&discard,
&writes,
&discard);
p->writesPerSec = writes;
p->readsPerSec = reads;
fprintf(stderr, "%s:\t%u\t%u\n",
data->diskInfo.mdata[i].mountpoint,
reads, writes);
}
return;
}
void init_disk_data(PERF_DATA_BLOCK *data)
{
init_diskdata_desc(data);
init_num_disks(data);
data->diskInfo.mdata = calloc(data->diskInfo.numDisks, sizeof(DiskMetaData));
if(!data->diskInfo.mdata)
{
fatal("init_disk_data: out of memory");
}
init_disk_names(data);
data->diskInfo.data = calloc(data->diskInfo.numDisks, sizeof(DiskData));
if(!data->diskInfo.data)
{
fatal("init_disk_data: out of memory");
}
get_diskinfo(data);
return;
}
void output_disk_desc(PERF_DATA_BLOCK *data, RuntimeSettings rt)
{
output_perf_desc(data->diskInfo.diskObjDesc, rt);
output_perf_desc(data->diskInfo.freeMegs, rt);
output_perf_desc(data->diskInfo.writesPerSec, rt);
output_perf_desc(data->diskInfo.readsPerSec, rt);
output_num_instances(data->diskInfo.diskObjDesc, data->diskInfo.numDisks, rt);
return;
}
void output_diskinfo(PERF_DATA_BLOCK *data, RuntimeSettings rt, int tdb_flags)
{
int i;
output_perf_counter(data->diskInfo.freeMegs,
data->diskInfo.data[0].freeMegs,
rt, tdb_flags);
output_perf_counter(data->diskInfo.writesPerSec,
(unsigned long long)data->diskInfo.data[0].writesPerSec,
rt, tdb_flags);
output_perf_counter(data->diskInfo.readsPerSec,
(unsigned long long)data->diskInfo.data[0].readsPerSec,
rt, tdb_flags);
for(i = 0; i < data->diskInfo.numDisks; i++)
{
output_perf_instance(data->diskInfo.diskObjDesc.index,
i,
(void *)&(data->diskInfo.data[i]),
sizeof(DiskData),
data->diskInfo.mdata[i].mountpoint,
rt, tdb_flags);
}
return;
}
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