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  */
  30 struct 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
  45 enum {
  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
  54 enum {
  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
  62 enum {
  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 */