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/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  */
  31 struct 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
  46 enum {
  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
  55 enum {
  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
  63 enum {
  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 */