4584310b4a
Make this rename so that it is consistent with the majority of the other tipc structs and to assist in removing any ambiguity with other similar names in other subsystems. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
316 lines
10 KiB
C
316 lines
10 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, Ericsson AB
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* Copyright (c) 2004-2007, 2010-2011, 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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typedef void (*tipc_msg_err_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size, int reason,
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struct tipc_portid const *attmpt_destid);
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typedef void (*tipc_named_msg_err_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size, int reason,
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struct tipc_name_seq const *attmpt_dest);
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typedef void (*tipc_conn_shutdown_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size, int reason);
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typedef void (*tipc_msg_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size, unsigned int importance,
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struct tipc_portid const *origin);
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typedef void (*tipc_named_msg_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size, unsigned int importance,
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struct tipc_portid const *orig,
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struct tipc_name_seq const *dest);
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typedef void (*tipc_conn_msg_event) (void *usr_handle, u32 portref,
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struct sk_buff **buf, unsigned char const *data,
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unsigned int size);
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typedef void (*tipc_continue_event) (void *usr_handle, u32 portref);
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/**
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* struct user_port - TIPC user port (used with native API)
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* @usr_handle: user-specified field
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* @ref: object reference to associated TIPC port
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* <various callback routines>
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*/
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struct user_port {
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void *usr_handle;
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u32 ref;
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tipc_msg_err_event err_cb;
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tipc_named_msg_err_event named_err_cb;
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tipc_conn_shutdown_event conn_err_cb;
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tipc_msg_event msg_cb;
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tipc_named_msg_event named_msg_cb;
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tipc_conn_msg_event conn_msg_cb;
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tipc_continue_event continue_event_cb;
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};
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/**
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* struct tipc_port - TIPC port structure
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* @usr_handle: pointer to additional user-defined information about port
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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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* @user_port: ptr to user port associated with port (if any)
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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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void *usr_handle;
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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 user_port *user_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_raw(void *usr_handle,
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u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
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void (*wakeup)(struct tipc_port *), const u32 importance);
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int tipc_reject_msg(struct sk_buff *buf, u32 err);
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int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode);
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void tipc_acknowledge(u32 port_ref, u32 ack);
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int tipc_createport(void *usr_handle,
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unsigned int importance, tipc_msg_err_event error_cb,
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tipc_named_msg_err_event named_error_cb,
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tipc_conn_shutdown_event conn_error_cb, tipc_msg_event msg_cb,
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tipc_named_msg_event named_msg_cb,
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tipc_conn_msg_event conn_msg_cb,
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tipc_continue_event continue_event_cb, u32 *portref);
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int tipc_deleteport(u32 portref);
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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(u32 portref, unsigned int scope,
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struct tipc_name_seq const *name_seq);
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int tipc_withdraw(u32 portref, unsigned int scope,
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struct tipc_name_seq const *name_seq);
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int tipc_connect2port(u32 portref, struct tipc_portid const *port);
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int tipc_disconnect(u32 portref);
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int tipc_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_disconnect_port(struct tipc_port *tp_ptr);
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/*
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* TIPC messaging routines
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*/
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int tipc_send(u32 portref, unsigned int num_sect, struct iovec const *msg_sect,
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unsigned int total_len);
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int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain,
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unsigned int num_sect, struct iovec const *msg_sect,
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unsigned int total_len);
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int tipc_send2port(u32 portref, struct tipc_portid const *dest,
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unsigned int num_sect, struct iovec const *msg_sect,
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unsigned int total_len);
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int tipc_send_buf2port(u32 portref, struct tipc_portid const *dest,
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struct sk_buff *buf, unsigned int dsz);
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int tipc_multicast(u32 portref, struct tipc_name_seq const *seq,
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unsigned int section_count, struct iovec const *msg,
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unsigned int total_len);
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int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr,
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struct iovec const *msg_sect, u32 num_sect,
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unsigned int total_len, int err);
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struct sk_buff *tipc_port_get_ports(void);
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void tipc_port_recv_proto_msg(struct sk_buff *buf);
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void tipc_port_recv_mcast(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 u32 tipc_peer_port(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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static inline u32 tipc_peer_node(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 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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/**
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* tipc_port_recv_msg - receive message from lower layer and deliver to port user
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*/
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static inline int tipc_port_recv_msg(struct sk_buff *buf)
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{
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struct tipc_port *p_ptr;
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struct tipc_msg *msg = buf_msg(buf);
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u32 destport = msg_destport(msg);
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u32 dsz = msg_data_sz(msg);
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u32 err;
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/* forward unresolved named message */
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if (unlikely(!destport)) {
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tipc_net_route_msg(buf);
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return dsz;
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}
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/* validate destination & pass to port, otherwise reject message */
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p_ptr = tipc_port_lock(destport);
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if (likely(p_ptr)) {
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if (likely(p_ptr->connected)) {
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if ((unlikely(msg_origport(msg) != tipc_peer_port(p_ptr))) ||
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(unlikely(msg_orignode(msg) != tipc_peer_node(p_ptr))) ||
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(unlikely(!msg_connected(msg)))) {
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err = TIPC_ERR_NO_PORT;
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tipc_port_unlock(p_ptr);
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goto reject;
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}
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}
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err = p_ptr->dispatcher(p_ptr, buf);
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tipc_port_unlock(p_ptr);
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if (likely(!err))
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return dsz;
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} else {
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err = TIPC_ERR_NO_PORT;
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}
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reject:
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return tipc_reject_msg(buf, err);
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}
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#endif
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