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