1 /* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
2 /* cgroupstats.h - exporting per-cgroup statistics
3  *
4  * Copyright IBM Corporation, 2007
5  * Author Balbir Singh <balbir@linux.vnet.ibm.com>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of version 2.1 of the GNU Lesser General Public License
9  * as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it would be useful, but
12  * WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14  */
15 
16 #ifndef _LINUX_CGROUPSTATS_H
17 #define _LINUX_CGROUPSTATS_H
18 
19 #include <linux/types.h>
20 #include <linux/taskstats.h>
21 
22 /*
23  * Data shared between user space and kernel space on a per cgroup
24  * basis. This data is shared using taskstats.
25  *
26  * Most of these states are derived by looking at the task->state value
27  * For the nr_io_wait state, a flag in the delay accounting structure
28  * indicates that the task is waiting on IO
29  *
30  * Each member is aligned to a 8 byte boundary.
31  */
32 struct cgroupstats {
33 	__u64	nr_sleeping;		/* Number of tasks sleeping */
34 	__u64	nr_running;		/* Number of tasks running */
35 	__u64	nr_stopped;		/* Number of tasks in stopped state */
36 	__u64	nr_uninterruptible;	/* Number of tasks in uninterruptible */
37 					/* state */
38 	__u64	nr_io_wait;		/* Number of tasks waiting on IO */
39 };
40 
41 /*
42  * Commands sent from userspace
43  * Not versioned. New commands should only be inserted at the enum's end
44  * prior to __CGROUPSTATS_CMD_MAX
45  */
46 
47 enum {
48 	CGROUPSTATS_CMD_UNSPEC = __TASKSTATS_CMD_MAX,	/* Reserved */
49 	CGROUPSTATS_CMD_GET,		/* user->kernel request/get-response */
50 	CGROUPSTATS_CMD_NEW,		/* kernel->user event */
51 	__CGROUPSTATS_CMD_MAX,
52 };
53 
54 #define CGROUPSTATS_CMD_MAX (__CGROUPSTATS_CMD_MAX - 1)
55 
56 enum {
57 	CGROUPSTATS_TYPE_UNSPEC = 0,	/* Reserved */
58 	CGROUPSTATS_TYPE_CGROUP_STATS,	/* contains name + stats */
59 	__CGROUPSTATS_TYPE_MAX,
60 };
61 
62 #define CGROUPSTATS_TYPE_MAX (__CGROUPSTATS_TYPE_MAX - 1)
63 
64 enum {
65 	CGROUPSTATS_CMD_ATTR_UNSPEC = 0,
66 	CGROUPSTATS_CMD_ATTR_FD,
67 	__CGROUPSTATS_CMD_ATTR_MAX,
68 };
69 
70 #define CGROUPSTATS_CMD_ATTR_MAX (__CGROUPSTATS_CMD_ATTR_MAX - 1)
71 
72 #endif /* _LINUX_CGROUPSTATS_H */
73