linux/include/linux/cgroupstats.h
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   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
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