include/uapi/linux/cgroupstats.h

   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 */