cgroupstats.h

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/* 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 */