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/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by James Dominic P. Guana <guana.histark@gmail.com>, May 2020.
LibGTop 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 2 of the License,
or (at your option) any later version.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop/error.h>
#include <glibtop/disk.h>
#include "glibtop_private.h"
static const unsigned long _glibtop_sysdeps_disk =
(1L << GLIBTOP_XDISK_SECTORS_READ) + (1L << GLIBTOP_XDISK_TIME_READ) +
(1L << GLIBTOP_XDISK_SECTORS_WRITE) + (1L << GLIBTOP_XDISK_TIME_WRITE);
/* Init function. */
void
_glibtop_init_disk_s (glibtop *server)
{
server->sysdeps.disk = _glibtop_sysdeps_disk;
}
/* Provides information about disk usage. */
// Linux kernel reports sectors by 512 bytes even for AF 4kn //
#define FILENAME "/proc/diskstats"
#define CMD_PIPE "lsblk --output NAME,TYPE -i -n | sed 's/`-//'|sed 's/|-//'|sed 's/|//'| sed -e 's/^[ \t]*//'|tr -s ' '"
#define STAT_BUFSIZ 81920
// Handle LVM and RAID //
void
find_primary_part (partition_info *primary_part, const char *m)
{
int n = 0, tlvl = 0;
char name[256]="",type[256]="";
primary_part->max = 0;
//scan by tree level
//0 = disk (to lvl 0)
//0 = disk, 1 = part (to lvl 1)
//0 = disk, 1 = part, 2 = lvm or raid (to lvl 2)
//0 = disk, 1 = part, 2 = raid, 3 = lvm (to lvl 3)
while (sscanf(m, "%s %s", name, type) == 2)
{
if (tlvl == 0) {
if (strcmp (type, "disk") == 0) {
primary_part->max++;
}
else if ((strcmp (type, "part") == 0)){
tlvl = 1;
}
}
else if(tlvl == 1){
if (strcmp (type, "disk") == 0) {
n--;
tlvl = 0;
primary_part->max++;
}
else if ((strcmp (type, "part") == 0)) {
n--;
}
else if ((strcmp (type, "lvm") == 0)) {
tlvl = 2;
primary_part->max++;
}
else if ((strncmp (type, "raid", 4) == 0)) {
tlvl = 2;
primary_part->max++;
}
}
else if( tlvl == 2){
if (strcmp(type, "disk") == 0) {
n--;
tlvl = 0;
primary_part->max++;
}
else if ((strcmp (primary_part[n-1].type, "lvm") == 0) && (strcmp (type, "lvm") == 0)) {
n--;
}
else if ((strcmp (primary_part[n-1].type, "raid") == 0) && (strncmp (type, "raid", 4) == 0)) {
n--;
}
else if ((strcmp (primary_part[n-1].type, "lvm") == 0) && (strcmp (type, "part") == 0)) {
n--;
tlvl = 1;
}
else if ((strcmp (primary_part[n-1].type, "raid") == 0) && (strcmp (type, "part") == 0)) {
n--;
tlvl = 1;
}
else if ((strcmp (primary_part[n-1].type, "raid") == 0) && (strcmp (type, "lvm") == 0)){
tlvl = 3;
primary_part->max++;
}
}
else if (tlvl == 3) {
if (strcmp (type, "disk") == 0) {
n--;
tlvl = 0;
primary_part->max++;
}
else if ((strcmp (type, "lvm") == 0)) {
n--;
}
else if ((strncmp (type, "raid", 4) == 0)) {
n--;
tlvl = 2;
}
else if ((strcmp (type, "part") == 0)) {
n--;
tlvl = 1;
}
}
strcpy (primary_part[n].name, name);
strncpy (primary_part[n].type, type, 4);
if (strcmp (primary_part[n].type, "raid") == 0) {
strcpy (primary_part[n].raid_num, type + 4);
}
m = skip_line (m);
n++;
}
}
int
is_virtual_drive (partition_info *primary_part, const char *p)
{
int i;
char name[256];
int test = 1;
sscanf (p, "%s", name);
if (*p) {
for (i=0; i<primary_part->max; i++) {
if (strcmp (primary_part[i].name, name) == 0) {
test = 0;
break;
}
}
}
else {
test = 0;
}
return test;
}
int
max_lines (const char *p)
{
char temp[10];
int count = 0;
while (sscanf (p, "%s", temp) == 1)
{
p = skip_line(p);
count++;
}
return count;
}
void
glibtop_get_disk_s (glibtop *server, glibtop_disk *buf)
{
partition_info primary_part[GLIBTOP_NDISK];
char buffer [STAT_BUFSIZ], *p, map_buffer [STAT_BUFSIZ], *m;
int i;
memset (buf, 0, sizeof (glibtop_disk));
file_to_buffer (server, buffer, sizeof buffer, FILENAME);
get_from_pipe (map_buffer, CMD_PIPE);
/*
* GLOBAL
*/
p = buffer; /* "disk" */
m = map_buffer;
/*
* PER DISK
*/
server->ndisk = max_lines(p);
find_primary_part (primary_part, m);
for (i = 0; i < server->ndisk; i++) {
p = skip_multiple_token (p,2);
// skip if disk is the raw device
if (!is_virtual_drive (primary_part, p)) {
server->ndisk--;
p = skip_line (p); /* move to ^ */
p = skip_multiple_token (p, 2);
}
p = skip_token (p); /* prev xdisk_name */
p = skip_token (p); /* prev xdisk_reads_completed */
p = skip_token (p); /* prev xdisk_reads_merged */
buf->xdisk_sectors_read [i] = strtoull (p, &p, 0);
buf->xdisk_time_read [i] = strtoull (p, &p, 0);
p = skip_token (p); /* prev xdisk_writes_completed */
p = skip_token (p); /* prev xdisk_writes_merged */
buf->xdisk_sectors_write [i] = strtoull (p, &p, 0);
buf->xdisk_time_write [i] = strtoull (p, &p, 0);
p = skip_line (p); /* move to ^ */
}
}
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