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Diffstat (limited to 'net/tipc/core.h')
| -rw-r--r-- | net/tipc/core.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h new file mode 100644 index 00000000000..bb26ed1ee96 --- /dev/null +++ b/net/tipc/core.h @@ -0,0 +1,203 @@ +/* + * 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> +#include <linux/rtnetlink.h> +#include <linux/etherdevice.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 sysctl_tipc_rmem[3] __read_mostly; + +/* + * Other global variables + */ +extern int tipc_random __read_mostly; + +/* + * Routines available to privileged subsystems + */ +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 code + */ +typedef void (*Handler) (unsigned long); + +/** + * 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; + struct sk_buff *tail; +}; + +#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 |