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/*
* diskstats.c - disk I/O related declarations for libprocps
*
* Copyright © 2015-2023 Craig Small <csmall@dropbear.xyz>
* Copyright © 2015-2023 Jim Warner <james.warner@comcast.net>
* Copyright © 2003 Albert Cahalan
* Copyright © 2003 Fabian Frederick
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef PROCPS_DISKSTATS_H
#define PROCPS_DISKSTATS_H
#ifdef __cplusplus
extern "C" {
#endif
enum diskstats_item {
DISKSTATS_noop, // ( never altered )
DISKSTATS_extra, // ( reset to zero )
// returns origin, see proc(5)
// ------- -------------------
DISKSTATS_NAME, // str /proc/diskstats
DISKSTATS_TYPE, // s_int "
DISKSTATS_MAJOR, // s_int "
DISKSTATS_MINOR, // s_int "
DISKSTATS_READS, // ul_int "
DISKSTATS_READS_MERGED, // ul_int "
DISKSTATS_READ_SECTORS, // ul_int "
DISKSTATS_READ_TIME, // ul_int "
DISKSTATS_WRITES, // ul_int "
DISKSTATS_WRITES_MERGED, // ul_int "
DISKSTATS_WRITE_SECTORS, // ul_int "
DISKSTATS_WRITE_TIME, // ul_int "
DISKSTATS_IO_TIME, // ul_int "
DISKSTATS_WEIGHTED_TIME, // ul_int "
DISKSTATS_IO_INPROGRESS, // s_int "
DISKSTATS_DELTA_READS, // s_int derived from above
DISKSTATS_DELTA_READS_MERGED, // s_int "
DISKSTATS_DELTA_READ_SECTORS, // s_int "
DISKSTATS_DELTA_READ_TIME, // s_int "
DISKSTATS_DELTA_WRITES, // s_int "
DISKSTATS_DELTA_WRITES_MERGED, // s_int "
DISKSTATS_DELTA_WRITE_SECTORS, // s_int "
DISKSTATS_DELTA_WRITE_TIME, // s_int "
DISKSTATS_DELTA_IO_TIME, // s_int "
DISKSTATS_DELTA_WEIGHTED_TIME // s_int "
};
enum diskstats_sort_order {
DISKSTATS_SORT_ASCEND = +1,
DISKSTATS_SORT_DESCEND = -1
};
struct diskstats_result {
enum diskstats_item item;
union {
signed int s_int;
unsigned long ul_int;
char *str;
} result;
};
struct diskstats_stack {
struct diskstats_result *head;
};
struct diskstats_reaped {
int total;
struct diskstats_stack **stacks;
};
struct diskstats_info;
#define DISKSTATS_TYPE_DISK -11111
#define DISKSTATS_TYPE_PARTITION -22222
#define DISKSTATS_GET( info, name, actual_enum, type ) ( { \
struct diskstats_result *r = procps_diskstats_get( info, name, actual_enum ); \
r ? r->result . type : 0; } )
#define DISKSTATS_VAL( relative_enum, type, stack, info ) \
stack -> head [ relative_enum ] . result . type
int procps_diskstats_new (struct diskstats_info **info);
int procps_diskstats_ref (struct diskstats_info *info);
int procps_diskstats_unref (struct diskstats_info **info);
struct diskstats_result *procps_diskstats_get (
struct diskstats_info *info,
const char *name,
enum diskstats_item item);
struct diskstats_reaped *procps_diskstats_reap (
struct diskstats_info *info,
enum diskstats_item *items,
int numitems);
struct diskstats_stack *procps_diskstats_select (
struct diskstats_info *info,
const char *name,
enum diskstats_item *items,
int numitems);
struct diskstats_stack **procps_diskstats_sort (
struct diskstats_info *info,
struct diskstats_stack *stacks[],
int numstacked,
enum diskstats_item sortitem,
enum diskstats_sort_order order);
#ifdef XTRA_PROCPS_DEBUG
# include "xtra-procps-debug.h"
#endif
#ifdef __cplusplus
}
#endif
#endif
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