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