1/* cgroupstats.h - exporting per-cgroup statistics
2 *
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2.1 of the GNU Lesser General Public License
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 */
14
15#ifndef _LINUX_CGROUPSTATS_H
16#define _LINUX_CGROUPSTATS_H
17
18#include <linux/types.h>
19#include <linux/taskstats.h>
20
21/*
22 * Data shared between user space and kernel space on a per cgroup
23 * basis. This data is shared using taskstats.
24 *
25 * Most of these states are derived by looking at the task->state value
26 * For the nr_io_wait state, a flag in the delay accounting structure
27 * indicates that the task is waiting on IO
28 *
29 * Each member is aligned to a 8 byte boundary.
30 */
31struct cgroupstats {
32	__u64	nr_sleeping;		/* Number of tasks sleeping */
33	__u64	nr_running;		/* Number of tasks running */
34	__u64	nr_stopped;		/* Number of tasks in stopped state */
35	__u64	nr_uninterruptible;	/* Number of tasks in uninterruptible */
36					/* state */
37	__u64	nr_io_wait;		/* Number of tasks waiting on IO */
38};
39
40/*
41 * Commands sent from userspace
42 * Not versioned. New commands should only be inserted at the enum's end
43 * prior to __CGROUPSTATS_CMD_MAX
44 */
45
46enum {
47	CGROUPSTATS_CMD_UNSPEC = __TASKSTATS_CMD_MAX,	/* Reserved */
48	CGROUPSTATS_CMD_GET,		/* user->kernel request/get-response */
49	CGROUPSTATS_CMD_NEW,		/* kernel->user event */
50	__CGROUPSTATS_CMD_MAX,
51};
52
53#define CGROUPSTATS_CMD_MAX (__CGROUPSTATS_CMD_MAX - 1)
54
55enum {
56	CGROUPSTATS_TYPE_UNSPEC = 0,	/* Reserved */
57	CGROUPSTATS_TYPE_CGROUP_STATS,	/* contains name + stats */
58	__CGROUPSTATS_TYPE_MAX,
59};
60
61#define CGROUPSTATS_TYPE_MAX (__CGROUPSTATS_TYPE_MAX - 1)
62
63enum {
64	CGROUPSTATS_CMD_ATTR_UNSPEC = 0,
65	CGROUPSTATS_CMD_ATTR_FD,
66	__CGROUPSTATS_CMD_ATTR_MAX,
67};
68
69#define CGROUPSTATS_CMD_ATTR_MAX (__CGROUPSTATS_CMD_ATTR_MAX - 1)
70
71#endif /* _LINUX_CGROUPSTATS_H */
72