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Diffstat (limited to 'include/rxrpc/transport.h')
| -rw-r--r-- | include/rxrpc/transport.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/include/rxrpc/transport.h b/include/rxrpc/transport.h new file mode 100644 index 00000000000..7c7b9683fa3 --- /dev/null +++ b/include/rxrpc/transport.h @@ -0,0 +1,106 @@ +/* transport.h: Rx transport management + * + * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _LINUX_RXRPC_TRANSPORT_H +#define _LINUX_RXRPC_TRANSPORT_H + +#include <rxrpc/types.h> +#include <rxrpc/krxiod.h> +#include <rxrpc/rxrpc.h> +#include <linux/skbuff.h> +#include <linux/rwsem.h> + +typedef int (*rxrpc_newcall_fnx_t)(struct rxrpc_call *call); + +extern wait_queue_head_t rxrpc_krxiod_wq; + +/*****************************************************************************/ +/* + * Rx operation specification + * - tables of these must be sorted by op ID so that they can be binary-chop searched + */ +struct rxrpc_operation +{ + unsigned id; /* operation ID */ + size_t asize; /* minimum size of argument block */ + const char *name; /* name of operation */ + void *user; /* initial user data */ +}; + +/*****************************************************************************/ +/* + * Rx transport service record + */ +struct rxrpc_service +{ + struct list_head link; /* link in services list on transport */ + struct module *owner; /* owner module */ + rxrpc_newcall_fnx_t new_call; /* new call handler function */ + const char *name; /* name of service */ + unsigned short service_id; /* Rx service ID */ + rxrpc_call_attn_func_t attn_func; /* call requires attention callback */ + rxrpc_call_error_func_t error_func; /* call error callback */ + rxrpc_call_aemap_func_t aemap_func; /* abort -> errno mapping callback */ + + const struct rxrpc_operation *ops_begin; /* beginning of operations table */ + const struct rxrpc_operation *ops_end; /* end of operations table */ +}; + +/*****************************************************************************/ +/* + * Rx transport endpoint record + */ +struct rxrpc_transport +{ + atomic_t usage; + struct socket *socket; /* my UDP socket */ + struct list_head services; /* services listening on this socket */ + struct list_head link; /* link in transport list */ + struct list_head proc_link; /* link in transport proc list */ + struct list_head krxiodq_link; /* krxiod attention queue link */ + spinlock_t lock; /* access lock */ + struct list_head peer_active; /* active peers connected to over this socket */ + struct list_head peer_graveyard; /* inactive peer list */ + spinlock_t peer_gylock; /* peer graveyard lock */ + wait_queue_head_t peer_gy_waitq; /* wait queue hit when peer graveyard is empty */ + rwlock_t peer_lock; /* peer list access lock */ + atomic_t peer_count; /* number of peers */ + struct rxrpc_peer_ops *peer_ops; /* default peer operations */ + unsigned short port; /* port upon which listening */ + volatile char error_rcvd; /* T if received ICMP error outstanding */ +}; + +extern int rxrpc_create_transport(unsigned short port, + struct rxrpc_transport **_trans); + +static inline void rxrpc_get_transport(struct rxrpc_transport *trans) +{ + BUG_ON(atomic_read(&trans->usage) <= 0); + atomic_inc(&trans->usage); + //printk("rxrpc_get_transport(%p{u=%d})\n", + // trans, atomic_read(&trans->usage)); +} + +extern void rxrpc_put_transport(struct rxrpc_transport *trans); + +extern int rxrpc_add_service(struct rxrpc_transport *trans, + struct rxrpc_service *srv); + +extern void rxrpc_del_service(struct rxrpc_transport *trans, + struct rxrpc_service *srv); + +extern void rxrpc_trans_receive_packet(struct rxrpc_transport *trans); + +extern int rxrpc_trans_immediate_abort(struct rxrpc_transport *trans, + struct rxrpc_message *msg, + int error); + +#endif /* _LINUX_RXRPC_TRANSPORT_H */ |