1 /* 2 * include/net/9p/transport.h 3 * 4 * Transport Definition 5 * 6 * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> 7 * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 11 * as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to: 20 * Free Software Foundation 21 * 51 Franklin Street, Fifth Floor 22 * Boston, MA 02111-1301 USA 23 * 24 */ 25 26 #ifndef NET_9P_TRANSPORT_H 27 #define NET_9P_TRANSPORT_H 28 29 #define P9_TRANS_PREF_PAYLOAD_MASK 0x1 30 31 /* Default. Add Payload to PDU before sending it down to transport layer */ 32 #define P9_TRANS_PREF_PAYLOAD_DEF 0x0 33 /* Send pay load separately to transport layer along with PDU.*/ 34 #define P9_TRANS_PREF_PAYLOAD_SEP 0x1 35 36 /** 37 * struct p9_trans_module - transport module interface 38 * @list: used to maintain a list of currently available transports 39 * @name: the human-readable name of the transport 40 * @maxsize: transport provided maximum packet size 41 * @pref: Preferences of this transport 42 * @def: set if this transport should be considered the default 43 * @create: member function to create a new connection on this transport 44 * @request: member function to issue a request to the transport 45 * @cancel: member function to cancel a request (if it hasn't been sent) 46 * 47 * This is the basic API for a transport module which is registered by the 48 * transport module with the 9P core network module and used by the client 49 * to instantiate a new connection on a transport. 50 * 51 * BUGS: the transport module list isn't protected. 52 */ 53 54 struct p9_trans_module { 55 struct list_head list; 56 char *name; /* name of transport */ 57 int maxsize; /* max message size of transport */ 58 int pref; /* Preferences of this transport */ 59 int def; /* this transport should be default */ 60 struct module *owner; 61 int (*create)(struct p9_client *, const char *, char *); 62 void (*close) (struct p9_client *); 63 int (*request) (struct p9_client *, struct p9_req_t *req); 64 int (*cancel) (struct p9_client *, struct p9_req_t *req); 65 }; 66 67 void v9fs_register_trans(struct p9_trans_module *m); 68 void v9fs_unregister_trans(struct p9_trans_module *m); 69 struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name); 70 struct p9_trans_module *v9fs_get_default_trans(void); 71 void v9fs_put_trans(struct p9_trans_module *m); 72 #endif /* NET_9P_TRANSPORT_H */ 73