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_DEF_MIN_RESVPORT (665U) 30 #define P9_DEF_MAX_RESVPORT (1023U) 31 32 /** 33 * struct p9_trans_module - transport module interface 34 * @list: used to maintain a list of currently available transports 35 * @name: the human-readable name of the transport 36 * @maxsize: transport provided maximum packet size 37 * @def: set if this transport should be considered the default 38 * @create: member function to create a new connection on this transport 39 * @close: member function to discard a connection on this transport 40 * @request: member function to issue a request to the transport 41 * @cancel: member function to cancel a request (if it hasn't been sent) 42 * @cancelled: member function to notify that a cancelled request will not 43 * not receive a reply 44 * 45 * This is the basic API for a transport module which is registered by the 46 * transport module with the 9P core network module and used by the client 47 * to instantiate a new connection on a transport. 48 * 49 * The transport module list is protected by v9fs_trans_lock. 50 */ 51 52 struct p9_trans_module { 53 struct list_head list; 54 char *name; /* name of transport */ 55 int maxsize; /* max message size of transport */ 56 int def; /* this transport should be default */ 57 struct module *owner; 58 int (*create)(struct p9_client *, const char *, char *); 59 void (*close) (struct p9_client *); 60 int (*request) (struct p9_client *, struct p9_req_t *req); 61 int (*cancel) (struct p9_client *, struct p9_req_t *req); 62 int (*cancelled)(struct p9_client *, struct p9_req_t *req); 63 int (*zc_request)(struct p9_client *, struct p9_req_t *, 64 struct iov_iter *, struct iov_iter *, int , int, int); 65 int (*show_options)(struct seq_file *, struct p9_client *); 66 }; 67 68 void v9fs_register_trans(struct p9_trans_module *m); 69 void v9fs_unregister_trans(struct p9_trans_module *m); 70 struct p9_trans_module *v9fs_get_trans_by_name(char *s); 71 struct p9_trans_module *v9fs_get_default_trans(void); 72 void v9fs_put_trans(struct p9_trans_module *m); 73 #endif /* NET_9P_TRANSPORT_H */ 74