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d999297c3d
We convert packet/message reception according to the same principle we have been using for message sending and timeout handling: We move the function tipc_rcv() to node.c, hence handling the initial packet reception at the link aggregation level. The function grabs the node lock, selects the receiving link, and accesses it via a new call tipc_link_rcv(). This function appends buffers to the input queue for delivery upwards, but it may also append outgoing packets to the xmit queue, just as we do during regular message sending. The latter will happen when buffers are forwarded from the link backlog, or when retransmission is requested. Upon return of this function, and after having released the node lock, tipc_rcv() delivers/tranmsits the contents of those queues, but it may also perform actions such as link activation or reset, as indicated by the return flags from the link. This reduces the number of cpu cycles spent inside the node spinlock, and reduces contention on that lock. Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*
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* net/tipc/core.h: Include file for TIPC global declarations
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*
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* Copyright (c) 2005-2006, 2013 Ericsson AB
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* Copyright (c) 2005-2007, 2010-2013, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIPC_CORE_H
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#define _TIPC_CORE_H
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#include <linux/tipc.h>
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#include <linux/tipc_config.h>
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#include <linux/tipc_netlink.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/uaccess.h>
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#include <linux/interrupt.h>
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#include <linux/atomic.h>
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#include <asm/hardirq.h>
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#include <linux/netdevice.h>
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#include <linux/in.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/rtnetlink.h>
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#include <linux/etherdevice.h>
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#include <net/netns/generic.h>
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#include <linux/rhashtable.h>
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struct tipc_node;
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struct tipc_bearer;
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struct tipc_bcbearer;
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struct tipc_bclink;
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struct tipc_link;
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struct tipc_name_table;
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struct tipc_server;
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#define TIPC_MOD_VER "2.0.0"
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#define NODE_HTABLE_SIZE 512
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#define MAX_BEARERS 3
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extern int tipc_net_id __read_mostly;
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extern int sysctl_tipc_rmem[3] __read_mostly;
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extern int sysctl_tipc_named_timeout __read_mostly;
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struct tipc_net {
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u32 own_addr;
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int net_id;
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int random;
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/* Node table and node list */
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spinlock_t node_list_lock;
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struct hlist_head node_htable[NODE_HTABLE_SIZE];
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struct list_head node_list;
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u32 num_nodes;
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u32 num_links;
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/* Bearer list */
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struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
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/* Broadcast link */
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struct tipc_bcbearer *bcbearer;
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struct tipc_bclink *bclink;
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struct tipc_link *bcl;
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/* Socket hash table */
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struct rhashtable sk_rht;
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/* Name table */
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spinlock_t nametbl_lock;
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struct name_table *nametbl;
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/* Topology subscription server */
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struct tipc_server *topsrv;
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atomic_t subscription_count;
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};
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static inline u16 mod(u16 x)
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{
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return x & 0xffffu;
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}
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static inline int less_eq(u16 left, u16 right)
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{
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return mod(right - left) < 32768u;
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}
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static inline int more(u16 left, u16 right)
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{
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return !less_eq(left, right);
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}
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static inline int less(u16 left, u16 right)
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{
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return less_eq(left, right) && (mod(right) != mod(left));
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}
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static inline int in_range(u16 val, u16 min, u16 max)
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{
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return !less(val, min) && !more(val, max);
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}
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#ifdef CONFIG_SYSCTL
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int tipc_register_sysctl(void);
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void tipc_unregister_sysctl(void);
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#else
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#define tipc_register_sysctl() 0
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#define tipc_unregister_sysctl()
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#endif
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#endif
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