linux-imx

/*

 * POSIX message queues filesystem for Linux.

 *

 * Copyright (C) 2003,2004  Krzysztof Benedyczak    (golbi@mat.uni.torun.pl)

 *                          Michal Wronski          (michal.wronski@gmail.com)

 *

 * Spinlocks:               Mohamed Abbas           (abbas.mohamed@intel.com)

 * Lockless receive & send, fd based notify:

 *              Manfred Spraul      (manfred@colorfullife.com)

 *

 * Audit:                   George Wilson           (ltcgcw@us.ibm.com)

 *

 * This file is released under the GPL.

 */

​

#include <linux/capability.h>

#include <linux/init.h>

#include <linux/pagemap.h>

#include <linux/file.h>

#include <linux/mount.h>

#include <linux/fs_context.h>

#include <linux/namei.h>

#include <linux/sysctl.h>

#include <linux/poll.h>

#include <linux/mqueue.h>

#include <linux/msg.h>

#include <linux/skbuff.h>

#include <linux/vmalloc.h>

#include <linux/netlink.h>

#include <linux/syscalls.h>

#include <linux/audit.h>

#include <linux/signal.h>

#include <linux/mutex.h>

#include <linux/nsproxy.h>

#include <linux/pid.h>

#include <linux/ipc_namespace.h>

#include <linux/user_namespace.h>

#include <linux/slab.h>

#include <linux/sched/wake_q.h>

#include <linux/sched/signal.h>

#include <linux/sched/user.h>

​

#include <net/sock.h>

#include "util.h"

​

struct mqueue_fs_context {

    struct ipc_namespace    *ipc_ns;

};

​

#define MQUEUE_MAGIC    0x19800202

#define DIRENT_SIZE 20

#define FILENT_SIZE 80

​

#define SEND        0

#define RECV        1

​

#define STATE_NONE  0

#define STATE_READY 1

​

struct posix_msg_tree_node {

    struct rb_node      rb_node;

    struct list_head    msg_list;

    int         priority;