forked from luck/tmp_suning_uos_patched
8826cde655
After the removal of the tipc native API the relation between a tipc_port and its API types is strictly one-to-one, i.e, the latter can now only be a socket API. There is therefore no need to allocate struct tipc_port and struct sock independently. In this commit, we aggregate struct tipc_port into struct tipc_sock, hence saving both CPU cycles and structure complexity. There are no functional changes in this commit, except for the elimination of the separate allocation/freeing of tipc_port. All other changes are just adaptatons to the new data structure. This commit also opens up for further code simplifications and code volume reduction, something we will do in later commits. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
211 lines
7.2 KiB
C
211 lines
7.2 KiB
C
/*
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* net/tipc/port.h: Include file for TIPC port code
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*
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* Copyright (c) 1994-2007, 2014, Ericsson AB
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* Copyright (c) 2004-2007, 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_PORT_H
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#define _TIPC_PORT_H
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#include "ref.h"
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#include "net.h"
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#include "msg.h"
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#include "node_subscr.h"
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#define TIPC_FLOW_CONTROL_WIN 512
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#define CONN_OVERLOAD_LIMIT ((TIPC_FLOW_CONTROL_WIN * 2 + 1) * \
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SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
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/**
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* struct tipc_port - TIPC port structure
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* @lock: pointer to spinlock for controlling access to port
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* @connected: non-zero if port is currently connected to a peer port
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* @conn_type: TIPC type used when connection was established
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* @conn_instance: TIPC instance used when connection was established
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* @conn_unacked: number of unacknowledged messages received from peer port
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* @published: non-zero if port has one or more associated names
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* @congested: non-zero if cannot send because of link or port congestion
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* @max_pkt: maximum packet size "hint" used when building messages sent by port
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* @ref: unique reference to port in TIPC object registry
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* @phdr: preformatted message header used when sending messages
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* @port_list: adjacent ports in TIPC's global list of ports
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* @dispatcher: ptr to routine which handles received messages
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* @wakeup: ptr to routine to call when port is no longer congested
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* @wait_list: adjacent ports in list of ports waiting on link congestion
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* @waiting_pkts:
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* @sent: # of non-empty messages sent by port
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* @acked: # of non-empty message acknowledgements from connected port's peer
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* @publications: list of publications for port
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* @pub_count: total # of publications port has made during its lifetime
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* @probing_state:
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* @probing_interval:
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* @timer_ref:
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* @subscription: "node down" subscription used to terminate failed connections
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*/
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struct tipc_port {
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spinlock_t *lock;
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int connected;
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u32 conn_type;
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u32 conn_instance;
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u32 conn_unacked;
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int published;
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u32 congested;
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u32 max_pkt;
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u32 ref;
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struct tipc_msg phdr;
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struct list_head port_list;
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u32 (*dispatcher)(struct tipc_port *, struct sk_buff *);
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void (*wakeup)(struct tipc_port *);
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struct list_head wait_list;
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u32 waiting_pkts;
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u32 sent;
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u32 acked;
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struct list_head publications;
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u32 pub_count;
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u32 probing_state;
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u32 probing_interval;
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struct timer_list timer;
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struct tipc_node_subscr subscription;
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};
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extern spinlock_t tipc_port_list_lock;
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struct tipc_port_list;
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/*
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* TIPC port manipulation routines
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*/
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struct tipc_port *tipc_createport(struct sock *sk,
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u32 (*dispatcher)(struct tipc_port *,
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struct sk_buff *),
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void (*wakeup)(struct tipc_port *),
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const u32 importance);
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int tipc_reject_msg(struct sk_buff *buf, u32 err);
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void tipc_acknowledge(u32 port_ref, u32 ack);
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int tipc_deleteport(struct tipc_port *p_ptr);
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int tipc_portimportance(u32 portref, unsigned int *importance);
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int tipc_set_portimportance(u32 portref, unsigned int importance);
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int tipc_portunreliable(u32 portref, unsigned int *isunreliable);
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int tipc_set_portunreliable(u32 portref, unsigned int isunreliable);
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int tipc_portunreturnable(u32 portref, unsigned int *isunreturnable);
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int tipc_set_portunreturnable(u32 portref, unsigned int isunreturnable);
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int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
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struct tipc_name_seq const *name_seq);
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int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
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struct tipc_name_seq const *name_seq);
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int tipc_port_connect(u32 portref, struct tipc_portid const *port);
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int tipc_port_disconnect(u32 portref);
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int tipc_port_shutdown(u32 ref);
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/*
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* The following routines require that the port be locked on entry
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*/
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int __tipc_port_disconnect(struct tipc_port *tp_ptr);
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int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
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struct tipc_portid const *peer);
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int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg);
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/*
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* TIPC messaging routines
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*/
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int tipc_port_rcv(struct sk_buff *buf);
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int tipc_send(u32 portref, struct iovec const *msg_sect, unsigned int len);
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int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain,
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struct iovec const *msg_sect, unsigned int len);
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int tipc_send2port(u32 portref, struct tipc_portid const *dest,
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struct iovec const *msg_sect, unsigned int len);
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int tipc_port_mcast_xmit(u32 portref, struct tipc_name_seq const *seq,
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struct iovec const *msg, unsigned int len);
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int tipc_port_iovec_reject(struct tipc_port *p_ptr, struct tipc_msg *hdr,
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struct iovec const *msg_sect, unsigned int len,
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int err);
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struct sk_buff *tipc_port_get_ports(void);
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void tipc_port_proto_rcv(struct sk_buff *buf);
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void tipc_port_mcast_rcv(struct sk_buff *buf, struct tipc_port_list *dp);
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void tipc_port_reinit(void);
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/**
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* tipc_port_lock - lock port instance referred to and return its pointer
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*/
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static inline struct tipc_port *tipc_port_lock(u32 ref)
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{
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return (struct tipc_port *)tipc_ref_lock(ref);
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}
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/**
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* tipc_port_unlock - unlock a port instance
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*
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* Can use pointer instead of tipc_ref_unlock() since port is already locked.
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*/
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static inline void tipc_port_unlock(struct tipc_port *p_ptr)
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{
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spin_unlock_bh(p_ptr->lock);
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}
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static inline struct tipc_port *tipc_port_deref(u32 ref)
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{
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return (struct tipc_port *)tipc_ref_deref(ref);
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}
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static inline int tipc_port_congested(struct tipc_port *p_ptr)
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{
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return (p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2);
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}
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static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
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{
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return msg_destnode(&p_ptr->phdr);
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}
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static inline u32 tipc_port_peerport(struct tipc_port *p_ptr)
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{
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return msg_destport(&p_ptr->phdr);
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}
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#endif
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