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/*
* Copyright (C) 2013-2015 Kay Sievers
* Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org>
* Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com>
* Copyright (C) 2013-2015 Linux Foundation
*
* kdbus is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/module.h>
#include "util.h"
#include "fs.h"
#include "handle.h"
#include "metadata.h"
#include "node.h"
/*
* This is a simplified outline of the internal kdbus object relations, for
* those interested in the inner life of the driver implementation.
*
* From a mount point's (domain's) perspective:
*
* struct kdbus_domain
* |» struct kdbus_user *user (many, owned)
* '» struct kdbus_node node (embedded)
* |» struct kdbus_node children (many, referenced)
* |» struct kdbus_node *parent (pinned)
* '» struct kdbus_bus (many, pinned)
* |» struct kdbus_node node (embedded)
* '» struct kdbus_ep (many, pinned)
* |» struct kdbus_node node (embedded)
* |» struct kdbus_bus *bus (pinned)
* |» struct kdbus_conn conn_list (many, pinned)
* | |» struct kdbus_ep *ep (pinned)
* | |» struct kdbus_name_entry *activator_of (owned)
* | |» struct kdbus_match_db *match_db (owned)
* | |» struct kdbus_meta *meta (owned)
* | |» struct kdbus_match_db *match_db (owned)
* | | '» struct kdbus_match_entry (many, owned)
* | |
* | |» struct kdbus_pool *pool (owned)
* | | '» struct kdbus_pool_slice *slices (many, owned)
* | | '» struct kdbus_pool *pool (pinned)
* | |
* | |» struct kdbus_user *user (pinned)
* | `» struct kdbus_queue_entry entries (many, embedded)
* | |» struct kdbus_pool_slice *slice (pinned)
* | |» struct kdbus_conn_reply *reply (owned)
* | '» struct kdbus_user *user (pinned)
* |
* '» struct kdbus_user *user (pinned)
* '» struct kdbus_policy_db policy_db (embedded)
* |» struct kdbus_policy_db_entry (many, owned)
* | |» struct kdbus_conn (pinned)
* | '» struct kdbus_ep (pinned)
* |
* '» struct kdbus_policy_db_cache_entry (many, owned)
* '» struct kdbus_conn (pinned)
*
* For the life-time of a file descriptor derived from calling open() on a file
* inside the mount point:
*
* struct kdbus_handle
* |» struct kdbus_meta *meta (owned)
* |» struct kdbus_ep *ep (pinned)
* |» struct kdbus_conn *conn (owned)
* '» struct kdbus_ep *ep (owned)
*/
/* kdbus mount-point /sys/fs/kdbus */
static struct kobject *kdbus_dir;
static int __init kdbus_init(void)
{
int ret;
kdbus_dir = kobject_create_and_add(KBUILD_MODNAME, fs_kobj);
if (!kdbus_dir)
return -ENOMEM;
ret = kdbus_fs_init();
if (ret < 0) {
pr_err("cannot register filesystem: %d\n", ret);
goto exit_dir;
}
pr_info("initialized\n");
return 0;
exit_dir:
kobject_put(kdbus_dir);
return ret;
}
static void __exit kdbus_exit(void)
{
kdbus_fs_exit();
kobject_put(kdbus_dir);
ida_destroy(&kdbus_node_ida);
}
module_init(kdbus_init);
module_exit(kdbus_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("D-Bus, powerful, easy to use interprocess communication");
MODULE_ALIAS_FS(KBUILD_MODNAME "fs");
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