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/*
* net/tipc/core.h: Include file for TIPC global declarations
*
* Copyright (c) 2005-2006, 2013 Ericsson AB
* Copyright (c) 2005-2007, 2010-2013, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _TIPC_CORE_H
#define _TIPC_CORE_H
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/tipc.h>
#include <linux/tipc_config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/interrupt.h>
#include <linux/atomic.h>
#include <asm/hardirq.h>
#include <linux/netdevice.h>
#include <linux/in.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#define TIPC_MOD_VER "2.0.0"
#define ULTRA_STRING_MAX_LEN 32768
#define TIPC_MAX_SUBSCRIPTIONS 65535
#define TIPC_MAX_PUBLICATIONS 65535
struct tipc_msg; /* msg.h */
int tipc_snprintf(char *buf, int len, const char *fmt, ...);
/*
* TIPC-specific error codes
*/
#define ELINKCONG EAGAIN /* link congestion <=> resource unavailable */
/*
* Global configuration variables
*/
extern u32 tipc_own_addr __read_mostly;
extern int tipc_max_ports __read_mostly;
extern int tipc_net_id __read_mostly;
extern int tipc_remote_management __read_mostly;
extern int sysctl_tipc_rmem[3] __read_mostly;
/*
* Other global variables
*/
extern int tipc_random __read_mostly;
/*
* Routines available to privileged subsystems
*/
int tipc_handler_start(void);
void tipc_handler_stop(void);
int tipc_netlink_start(void);
void tipc_netlink_stop(void);
int tipc_socket_init(void);
void tipc_socket_stop(void);
int tipc_sock_create_local(int type, struct socket **res);
void tipc_sock_release_local(struct socket *sock);
int tipc_sock_accept_local(struct socket *sock, struct socket **newsock,
int flags);
#ifdef CONFIG_SYSCTL
int tipc_register_sysctl(void);
void tipc_unregister_sysctl(void);
#else
#define tipc_register_sysctl() 0
#define tipc_unregister_sysctl()
#endif
/*
* TIPC timer and signal code
*/
typedef void (*Handler) (unsigned long);
u32 tipc_k_signal(Handler routine, unsigned long argument);
/**
* k_init_timer - initialize a timer
* @timer: pointer to timer structure
* @routine: pointer to routine to invoke when timer expires
* @argument: value to pass to routine when timer expires
*
* Timer must be initialized before use (and terminated when no longer needed).
*/
static inline void k_init_timer(struct timer_list *timer, Handler routine,
unsigned long argument)
{
setup_timer(timer, routine, argument);
}
/**
* k_start_timer - start a timer
* @timer: pointer to timer structure
* @msec: time to delay (in ms)
*
* Schedules a previously initialized timer for later execution.
* If timer is already running, the new timeout overrides the previous request.
*
* To ensure the timer doesn't expire before the specified delay elapses,
* the amount of delay is rounded up when converting to the jiffies
* then an additional jiffy is added to account for the fact that
* the starting time may be in the middle of the current jiffy.
*/
static inline void k_start_timer(struct timer_list *timer, unsigned long msec)
{
mod_timer(timer, jiffies + msecs_to_jiffies(msec) + 1);
}
/**
* k_cancel_timer - cancel a timer
* @timer: pointer to timer structure
*
* Cancels a previously initialized timer.
* Can be called safely even if the timer is already inactive.
*
* WARNING: Must not be called when holding locks required by the timer's
* timeout routine, otherwise deadlock can occur on SMP systems!
*/
static inline void k_cancel_timer(struct timer_list *timer)
{
del_timer_sync(timer);
}
/**
* k_term_timer - terminate a timer
* @timer: pointer to timer structure
*
* Prevents further use of a previously initialized timer.
*
* WARNING: Caller must ensure timer isn't currently running.
*
* (Do not "enhance" this routine to automatically cancel an active timer,
* otherwise deadlock can arise when a timeout routine calls k_term_timer.)
*/
static inline void k_term_timer(struct timer_list *timer)
{
}
/*
* TIPC message buffer code
*
* TIPC message buffer headroom reserves space for the worst-case
* link-level device header (in case the message is sent off-node).
*
* Note: Headroom should be a multiple of 4 to ensure the TIPC header fields
* are word aligned for quicker access
*/
#define BUF_HEADROOM LL_MAX_HEADER
struct tipc_skb_cb {
void *handle;
bool deferred;
};
#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
{
return (struct tipc_msg *)skb->data;
}
struct sk_buff *tipc_buf_acquire(u32 size);
#endif
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