107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
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/* transport.h: Rx transport management
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*
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* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_RXRPC_TRANSPORT_H
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#define _LINUX_RXRPC_TRANSPORT_H
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#include <rxrpc/types.h>
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#include <rxrpc/krxiod.h>
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#include <rxrpc/rxrpc.h>
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#include <linux/skbuff.h>
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#include <linux/rwsem.h>
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typedef int (*rxrpc_newcall_fnx_t)(struct rxrpc_call *call);
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extern wait_queue_head_t rxrpc_krxiod_wq;
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/*****************************************************************************/
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/*
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* Rx operation specification
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* - tables of these must be sorted by op ID so that they can be binary-chop searched
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*/
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struct rxrpc_operation
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{
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unsigned id; /* operation ID */
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size_t asize; /* minimum size of argument block */
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const char *name; /* name of operation */
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void *user; /* initial user data */
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};
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/*****************************************************************************/
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/*
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* Rx transport service record
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*/
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struct rxrpc_service
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{
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struct list_head link; /* link in services list on transport */
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struct module *owner; /* owner module */
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rxrpc_newcall_fnx_t new_call; /* new call handler function */
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const char *name; /* name of service */
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unsigned short service_id; /* Rx service ID */
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rxrpc_call_attn_func_t attn_func; /* call requires attention callback */
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rxrpc_call_error_func_t error_func; /* call error callback */
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rxrpc_call_aemap_func_t aemap_func; /* abort -> errno mapping callback */
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const struct rxrpc_operation *ops_begin; /* beginning of operations table */
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const struct rxrpc_operation *ops_end; /* end of operations table */
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};
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/*****************************************************************************/
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/*
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* Rx transport endpoint record
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*/
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struct rxrpc_transport
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{
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atomic_t usage;
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struct socket *socket; /* my UDP socket */
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struct list_head services; /* services listening on this socket */
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struct list_head link; /* link in transport list */
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struct list_head proc_link; /* link in transport proc list */
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struct list_head krxiodq_link; /* krxiod attention queue link */
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spinlock_t lock; /* access lock */
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struct list_head peer_active; /* active peers connected to over this socket */
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struct list_head peer_graveyard; /* inactive peer list */
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spinlock_t peer_gylock; /* peer graveyard lock */
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wait_queue_head_t peer_gy_waitq; /* wait queue hit when peer graveyard is empty */
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rwlock_t peer_lock; /* peer list access lock */
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atomic_t peer_count; /* number of peers */
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struct rxrpc_peer_ops *peer_ops; /* default peer operations */
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unsigned short port; /* port upon which listening */
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volatile char error_rcvd; /* T if received ICMP error outstanding */
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};
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extern int rxrpc_create_transport(unsigned short port,
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struct rxrpc_transport **_trans);
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static inline void rxrpc_get_transport(struct rxrpc_transport *trans)
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{
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BUG_ON(atomic_read(&trans->usage) <= 0);
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atomic_inc(&trans->usage);
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//printk("rxrpc_get_transport(%p{u=%d})\n",
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// trans, atomic_read(&trans->usage));
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}
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extern void rxrpc_put_transport(struct rxrpc_transport *trans);
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extern int rxrpc_add_service(struct rxrpc_transport *trans,
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struct rxrpc_service *srv);
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extern void rxrpc_del_service(struct rxrpc_transport *trans,
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struct rxrpc_service *srv);
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extern void rxrpc_trans_receive_packet(struct rxrpc_transport *trans);
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extern int rxrpc_trans_immediate_abort(struct rxrpc_transport *trans,
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struct rxrpc_message *msg,
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int error);
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#endif /* _LINUX_RXRPC_TRANSPORT_H */
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