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/*
* Copyright (C) 2013 Kay Sievers
* Copyright (C) 2013 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Copyright (C) 2013 Daniel Mack <daniel@zonque.org>
* Copyright (C) 2013 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.
*/
#ifndef __KDBUS_BUS_H
#define __KDBUS_BUS_H
#include <linux/hashtable.h>
#include <linux/idr.h>
#include "util.h"
/**
* struct kdbus_bus - bus in a domain
* @kref: Reference count
* @disconnected: Invalidated data
* @uid_owner: The uid of the owner of the bus
* @domain: Domain of this bus
* @name: The bus name
* @id: ID of this bus in the domain
* @lock: Bus data lock
* @ep: Default "bus" endpoint
* @ep_seq_last: Last used endpoint id sequence number
* @conn_seq_last: Last used connection id sequence number
* @conn_idr: Map of connection device minor nummbers
* @conn_hash: Map of connection IDs
* @ep_list: Endpoints on this bus
* @bus_flags: Simple pass-through flags from userspace to userspace
* @name_registry: Domain's list of buses
* @domain_entry: Domain's list of buses
* @monitors_list: Connections that monitor this bus
* @bloom: Bloom parameters
* @id128: Unique random 128 bit ID of this bus
* @user: Owner of the connection;
*
* A bus provides a "bus" endpoint / device node.
*
* A bus is created by opening the control node and issuing the
* KDBUS_CMD_BUS_MAKE iotcl. Closing this file immediately destroys
* the bus.
*/
struct kdbus_bus {
struct kref kref;
bool disconnected;
kuid_t uid_owner;
struct kdbus_domain *domain;
const char *name;
u64 id;
struct mutex lock;
struct kdbus_ep *ep;
u64 ep_seq_last;
atomic64_t conn_seq_last;
struct idr conn_idr;
DECLARE_HASHTABLE(conn_hash, 8);
struct list_head ep_list;
u64 bus_flags;
struct kdbus_name_registry *name_registry;
struct list_head domain_entry;
struct list_head monitors_list;
struct kdbus_bloom_parameter bloom;
u8 id128[16];
struct kdbus_domain_user *user;
};
int kdbus_bus_make_user(struct kdbus_cmd_make *make,
char **name, struct kdbus_bloom_parameter *bloom);
int kdbus_bus_new(struct kdbus_domain *domain,
struct kdbus_cmd_make *make, const char *name,
const struct kdbus_bloom_parameter *bloom,
umode_t mode, kuid_t uid, kgid_t gid,
struct kdbus_bus **bus);
struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus);
struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus);
void kdbus_bus_disconnect(struct kdbus_bus *bus);
bool kdbus_bus_uid_is_privileged(const struct kdbus_bus *bus);
struct kdbus_conn *kdbus_bus_find_conn_by_id(struct kdbus_bus *bus, u64 id);
#endif
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