LXR linux/include/linux/cgroupstats.h

   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/taskstats.h>
  19
  20/*
  21 * Data shared between user space and kernel space on a per cgroup
  22 * basis. This data is shared using taskstats.
  23 *
  24 * Most of these states are derived by looking at the task->state value
  25 * For the nr_io_wait state, a flag in the delay accounting structure
  26 * indicates that the task is waiting on IO
  27 *
  28 * Each member is aligned to a 8 byte boundary.
  29 */
  30struct cgroupstats {
  31        __u64   nr_sleeping;            /* Number of tasks sleeping */
  32        __u64   nr_running;             /* Number of tasks running */
  33        __u64   nr_stopped;             /* Number of tasks in stopped state */
  34        __u64   nr_uninterruptible;     /* Number of tasks in uninterruptible */
  35                                        /* state */
  36        __u64   nr_io_wait;             /* Number of tasks waiting on IO */
  37};
  38
  39/*
  40 * Commands sent from userspace
  41 * Not versioned. New commands should only be inserted at the enum's end
  42 * prior to __CGROUPSTATS_CMD_MAX
  43 */
  44
  45enum {
  46        CGROUPSTATS_CMD_UNSPEC = __TASKSTATS_CMD_MAX,   /* Reserved */
  47        CGROUPSTATS_CMD_GET,            /* user->kernel request/get-response */
  48        CGROUPSTATS_CMD_NEW,            /* kernel->user event */
  49        __CGROUPSTATS_CMD_MAX,
  50};
  51
  52#define CGROUPSTATS_CMD_MAX (__CGROUPSTATS_CMD_MAX - 1)
  53
  54enum {
  55        CGROUPSTATS_TYPE_UNSPEC = 0,    /* Reserved */
  56        CGROUPSTATS_TYPE_CGROUP_STATS,  /* contains name + stats */
  57        __CGROUPSTATS_TYPE_MAX,
  58};
  59
  60#define CGROUPSTATS_TYPE_MAX (__CGROUPSTATS_TYPE_MAX - 1)
  61
  62enum {
  63        CGROUPSTATS_CMD_ATTR_UNSPEC = 0,
  64        CGROUPSTATS_CMD_ATTR_FD,
  65        __CGROUPSTATS_CMD_ATTR_MAX,
  66};
  67
  68#define CGROUPSTATS_CMD_ATTR_MAX (__CGROUPSTATS_CMD_ATTR_MAX - 1)
  69
  70#endif /* _LINUX_CGROUPSTATS_H */
  71