887b3ece65
There was some cleanup issues during early mount which would trigger a kernel bug for certain types of failure. This patch reorganizes the cleanup to get rid of the bad behavior. This also merges the 9pnet and 9pnet_fd modules for the purpose of configuration and initialization. Keeping the fd transport separate from the core 9pnet code seemed like a good idea at the time, but in practice has caused more harm and confusion than good. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/*
|
|
* include/net/9p/transport.h
|
|
*
|
|
* Transport Definition
|
|
*
|
|
* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
|
|
* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to:
|
|
* Free Software Foundation
|
|
* 51 Franklin Street, Fifth Floor
|
|
* Boston, MA 02111-1301 USA
|
|
*
|
|
*/
|
|
|
|
#ifndef NET_9P_TRANSPORT_H
|
|
#define NET_9P_TRANSPORT_H
|
|
|
|
/**
|
|
* enum p9_trans_status - different states of underlying transports
|
|
* @Connected: transport is connected and healthy
|
|
* @Disconnected: transport has been disconnected
|
|
* @Hung: transport is connected by wedged
|
|
*
|
|
* This enumeration details the various states a transport
|
|
* instatiation can be in.
|
|
*/
|
|
|
|
enum p9_trans_status {
|
|
Connected,
|
|
Disconnected,
|
|
Hung,
|
|
};
|
|
|
|
/**
|
|
* struct p9_trans - per-transport state and API
|
|
* @status: transport &p9_trans_status
|
|
* @msize: negotiated maximum packet size (duplicate from client)
|
|
* @extended: negotiated protocol extensions (duplicate from client)
|
|
* @priv: transport private data
|
|
* @close: member function to disconnect and close the transport
|
|
* @rpc: member function to issue a request to the transport
|
|
*
|
|
* This is the basic API for a transport instance. It is used as
|
|
* a handle by the client to issue requests. This interface is currently
|
|
* in flux during reorganization.
|
|
*
|
|
* Bugs: there is lots of duplicated data here and its not clear that
|
|
* the member functions need to be per-instance versus per transport
|
|
* module.
|
|
*/
|
|
|
|
struct p9_trans {
|
|
enum p9_trans_status status;
|
|
int msize;
|
|
unsigned char extended;
|
|
void *priv;
|
|
void (*close) (struct p9_trans *);
|
|
int (*rpc) (struct p9_trans *t, struct p9_fcall *tc,
|
|
struct p9_fcall **rc);
|
|
};
|
|
|
|
/**
|
|
* struct p9_trans_module - transport module interface
|
|
* @list: used to maintain a list of currently available transports
|
|
* @name: the human-readable name of the transport
|
|
* @maxsize: transport provided maximum packet size
|
|
* @def: set if this transport should be considered the default
|
|
* @create: member function to create a new connection on this transport
|
|
*
|
|
* This is the basic API for a transport module which is registered by the
|
|
* transport module with the 9P core network module and used by the client
|
|
* to instantiate a new connection on a transport.
|
|
*
|
|
* Bugs: the transport module list isn't protected.
|
|
*/
|
|
|
|
struct p9_trans_module {
|
|
struct list_head list;
|
|
char *name; /* name of transport */
|
|
int maxsize; /* max message size of transport */
|
|
int def; /* this transport should be default */
|
|
struct p9_trans * (*create)(const char *, char *, int, unsigned char);
|
|
};
|
|
|
|
void v9fs_register_trans(struct p9_trans_module *m);
|
|
struct p9_trans_module *v9fs_match_trans(const substring_t *name);
|
|
struct p9_trans_module *v9fs_default_trans(void);
|
|
#endif /* NET_9P_TRANSPORT_H */
|