/* * net/tipc/core.h: Include file for TIPC global declarations *  * Copyright (c) 2005-2006, Ericsson AB * Copyright (c) 2005, 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 #include <linux/tipc.h>#include <linux/tipc_config.h>#include <net/tipc/tipc_msg.h>#include <net/tipc/tipc_port.h>#include <net/tipc/tipc_bearer.h>#include <net/tipc/tipc.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 <asm/uaccess.h>#include <linux/interrupt.h>#include <asm/atomic.h>#include <asm/hardirq.h>#include <linux/netdevice.h>#include <linux/in.h>	#include <linux/list.h>#include <linux/vmalloc.h> /* * TIPC debugging code */ #define assert(i)  BUG_ON(!(i)) struct tipc_msg;extern struct print_buf *TIPC_CONS, *TIPC_LOG;extern struct print_buf *TIPC_TEE(struct print_buf *, struct print_buf *);void tipc_msg_print(struct print_buf*,struct tipc_msg *,const char*);void tipc_printf(struct print_buf *, const char *fmt, ...);void tipc_dump(struct print_buf*,const char *fmt, ...); #ifdef CONFIG_TIPC_DEBUG /* * TIPC debug support included: * - system messages are printed to TIPC_OUTPUT print buffer * - debug messages are printed to DBG_OUTPUT print buffer */ #define err(fmt, arg...)  tipc_printf(TIPC_OUTPUT, KERN_ERR "TIPC: " fmt, ## arg)#define warn(fmt, arg...) tipc_printf(TIPC_OUTPUT, KERN_WARNING "TIPC: " fmt, ## arg)#define info(fmt, arg...) tipc_printf(TIPC_OUTPUT, KERN_NOTICE "TIPC: " fmt, ## arg) #define dbg(fmt, arg...)  do {if (DBG_OUTPUT) tipc_printf(DBG_OUTPUT, fmt, ## arg);} while(0)#define msg_dbg(msg, txt) do {if (DBG_OUTPUT) tipc_msg_print(DBG_OUTPUT, msg, txt);} while(0)#define dump(fmt, arg...) do {if (DBG_OUTPUT) tipc_dump(DBG_OUTPUT, fmt, ##arg);} while(0)  /*	 * By default, TIPC_OUTPUT is defined to be system console and TIPC log buffer, * while DBG_OUTPUT is the null print buffer.  These defaults can be changed * here, or on a per .c file basis, by redefining these symbols.  The following * print buffer options are available: * * NULL				: Output to null print buffer (i.e. print nowhere) * TIPC_CONS			: Output to system console * TIPC_LOG			: Output to TIPC log buffer  * &buf				: Output to user-defined buffer (struct print_buf *) * TIPC_TEE(&buf_a,&buf_b)	: Output to two print buffers (eg. TIPC_TEE(TIPC_CONS,TIPC_LOG) ) */ #ifndef TIPC_OUTPUT#define TIPC_OUTPUT TIPC_TEE(TIPC_CONS,TIPC_LOG)#endif #ifndef DBG_OUTPUT#define DBG_OUTPUT NULL#endif #else #ifndef DBG_OUTPUT#define DBG_OUTPUT NULL#endif /* * TIPC debug support not included: * - system messages are printed to system console * - debug messages are not printed */ #define err(fmt, arg...)  printk(KERN_ERR "TIPC: " fmt , ## arg)#define info(fmt, arg...) printk(KERN_INFO "TIPC: " fmt , ## arg)#define warn(fmt, arg...) printk(KERN_WARNING "TIPC: " fmt , ## arg) #define dbg(fmt, arg...) do {} while (0)#define msg_dbg(msg,txt) do {} while (0)#define dump(fmt,arg...) do {} while (0) #endif			    /*  * TIPC-specific error codes */ #define ELINKCONG EAGAIN	/* link congestion <=> resource unavailable */ /* * Global configuration variables */ extern u32 tipc_own_addr;extern int tipc_max_zones;extern int tipc_max_clusters;extern int tipc_max_nodes;extern int tipc_max_slaves;extern int tipc_max_ports;extern int tipc_max_subscriptions;extern int tipc_max_publications;extern int tipc_net_id;extern int tipc_remote_management; /* * Other global variables */ extern int tipc_mode;extern int tipc_random;extern const char tipc_alphabet[];extern atomic_t tipc_user_count;  /* * Routines available to privileged subsystems */ extern int  tipc_core_start(void);extern void tipc_core_stop(void);extern int  tipc_core_start_net(void);extern void tipc_core_stop_net(void); static inline int delimit(int val, int min, int max){	if (val > max)		return max;	if (val < min)		return min;	return val;}  /* * 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){	dbg("initializing timer %p\n", timer);	init_timer(timer);	timer->function = routine;	timer->data = 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){	dbg("starting timer %p for %u\n", timer, 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){	dbg("cancelling timer %p\n", 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){	dbg("terminating timer %p\n", timer);}  /* * TIPC message buffer code * * TIPC message buffer headroom leaves room for 14 byte Ethernet header,  * while ensuring TIPC header is word aligned for quicker access */ #define BUF_HEADROOM 16u  struct tipc_skb_cb {	void *handle;}; #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;} /** * buf_acquire - creates a TIPC message buffer * @size: message size (including TIPC header) * * Returns a new buffer.  Space is reserved for a data link header. */ static inline struct sk_buff *buf_acquire(u32 size){	struct sk_buff *skb;	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; 	skb = alloc_skb(buf_size, GFP_ATOMIC);	if (skb) {		skb_reserve(skb, BUF_HEADROOM);		skb_put(skb, size);		skb->next = NULL;	}	return skb;} /** * buf_discard - frees a TIPC message buffer * @skb: message buffer * * Frees a new buffer.  If passed NULL, just returns. */ static inline void buf_discard(struct sk_buff *skb){	if (likely(skb != NULL))		kfree_skb(skb);} #endif