/* cgroupstats.h - exporting per-cgroup statistics
*
* Copyright IBM Corporation, 2007
* Author Balbir Singh <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef _LINUX_CGROUPSTATS_H
#define _LINUX_CGROUPSTATS_H

#include <linux/types.h>
#include <linux/taskstats.h>

/*
* Data shared between user space and kernel space on a per cgroup
* basis. This data is shared using taskstats.
*
* Most of these states are derived by looking at the task->state value
* For the nr_io_wait state, a flag in the delay accounting structure
* indicates that the task is waiting on IO
*
* Each member is aligned to a 8 byte boundary.
*/
struct cgroupstats {
__u64 nr_sleeping; /* Number of tasks sleeping */
__u64 nr_running; /* Number of tasks running */
__u64 nr_stopped; /* Number of tasks in stopped state */
__u64 nr_uninterruptible; /* Number of tasks in uninterruptible */
/* state */
__u64 nr_io_wait; /* Number of tasks waiting on IO */
};

/*
* Commands sent from userspace
* Not versioned. New commands should only be inserted at the enum's end
* prior to __CGROUPSTATS_CMD_MAX
*/

enum {
CGROUPSTATS_CMD_UNSPEC = __TASKSTATS_CMD_MAX, /* Reserved */
CGROUPSTATS_CMD_GET, /* user->kernel request/get-response */
CGROUPSTATS_CMD_NEW, /* kernel->user event */
__CGROUPSTATS_CMD_MAX,
};

#define CGROUPSTATS_CMD_MAX (__CGROUPSTATS_CMD_MAX - 1)

enum {
CGROUPSTATS_TYPE_UNSPEC = 0, /* Reserved */
CGROUPSTATS_TYPE_CGROUP_STATS, /* contains name + stats */
__CGROUPSTATS_TYPE_MAX,
};

#define CGROUPSTATS_TYPE_MAX (__CGROUPSTATS_TYPE_MAX - 1)

enum {
CGROUPSTATS_CMD_ATTR_UNSPEC = 0,
CGROUPSTATS_CMD_ATTR_FD,
__CGROUPSTATS_CMD_ATTR_MAX,
};

#define CGROUPSTATS_CMD_ATTR_MAX (__CGROUPSTATS_CMD_ATTR_MAX - 1)

#endif /* _LINUX_CGROUPSTATS_H */