2 * include/net/9p/transport.h
6 * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
7 * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
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.
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.
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
26 #ifndef NET_9P_TRANSPORT_H
27 #define NET_9P_TRANSPORT_H
30 * enum p9_trans_status - different states of underlying transports
31 * @Connected: transport is connected and healthy
32 * @Disconnected: transport has been disconnected
33 * @Hung: transport is connected by wedged
35 * This enumeration details the various states a transport
36 * instatiation can be in.
39 enum p9_trans_status {
46 * struct p9_trans - per-transport state and API
47 * @status: transport &p9_trans_status
48 * @msize: negotiated maximum packet size (duplicate from client)
49 * @extended: negotiated protocol extensions (duplicate from client)
50 * @priv: transport private data
51 * @close: member function to disconnect and close the transport
52 * @rpc: member function to issue a request to the transport
54 * This is the basic API for a transport instance. It is used as
55 * a handle by the client to issue requests. This interface is currently
56 * in flux during reorganization.
58 * Bugs: there is lots of duplicated data here and its not clear that
59 * the member functions need to be per-instance versus per transport
64 enum p9_trans_status status;
66 unsigned char extended;
68 void (*close) (struct p9_trans *);
69 int (*rpc) (struct p9_trans *t, struct p9_fcall *tc,
70 struct p9_fcall **rc);
74 * struct p9_trans_module - transport module interface
75 * @list: used to maintain a list of currently available transports
76 * @name: the human-readable name of the transport
77 * @maxsize: transport provided maximum packet size
78 * @def: set if this transport should be considered the default
79 * @create: member function to create a new connection on this transport
81 * This is the basic API for a transport module which is registered by the
82 * transport module with the 9P core network module and used by the client
83 * to instantiate a new connection on a transport.
85 * Bugs: the transport module list isn't protected.
88 struct p9_trans_module {
89 struct list_head list;
90 char *name; /* name of transport */
91 int maxsize; /* max message size of transport */
92 int def; /* this transport should be default */
93 struct p9_trans * (*create)(const char *, char *, int, unsigned char);
96 void v9fs_register_trans(struct p9_trans_module *m);
97 struct p9_trans_module *v9fs_match_trans(const substring_t *name);
98 struct p9_trans_module *v9fs_default_trans(void);
99 #endif /* NET_9P_TRANSPORT_H */