linux/include/uapi/linux/cn_proc.h

/* SPDX-License-Identifier: LGPL-2.1 WITH Linux-syscall-note */
/*
 * cn_proc.h - process events connector
 *
 * Copyright (C) Matt Helsley, IBM Corp. 2005
 * Based on cn_fork.h by Nguyen Anh Quynh and Guillaume Thouvenin
 * Copyright (C) 2005 Nguyen Anh Quynh <[email protected]>
 * Copyright (C) 2005 Guillaume Thouvenin <[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 _UAPICN_PROC_H
#define _UAPICN_PROC_H

#include <linux/types.h>

/*
 * Userspace sends this enum to register with the kernel that it is listening
 * for events on the connector.
 */
enum proc_cn_mcast_op { … };

#define PROC_EVENT_ALL …

/*
 * If you add an entry in proc_cn_event, make sure you add it in
 * PROC_EVENT_ALL above as well.
 */
enum proc_cn_event { … };

struct proc_input { … };

static inline enum proc_cn_event valid_event(enum proc_cn_event ev_type)
{ … }

/*
 * From the user's point of view, the process
 * ID is the thread group ID and thread ID is the internal
 * kernel "pid". So, fields are assigned as follow:
 *
 *  In user space     -  In  kernel space
 *
 * parent process ID  =  parent->tgid
 * parent thread  ID  =  parent->pid
 * child  process ID  =  child->tgid
 * child  thread  ID  =  child->pid
 */

struct proc_event { … };

#endif /* _UAPICN_PROC_H */