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6f69c395ce
This patch adds preferences field to the p9_trans_module. Through this, now transport layer can express its preference about the payload. i.e if payload neds to be part of the PDU or it prefers it to be sent sepearetly so that the transport layer can handle it in a better way. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/*
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* include/net/9p/transport.h
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*
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* Transport Definition
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*
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* Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
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* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#ifndef NET_9P_TRANSPORT_H
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#define NET_9P_TRANSPORT_H
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#define P9_TRANS_PREF_PAYLOAD_MASK 0x1
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/* Default. Add Payload to PDU before sending it down to transport layer */
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#define P9_TRANS_PREF_PAYLOAD_DEF 0x0
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/* Send pay load seperately to transport layer along with PDU.*/
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#define P9_TRANS_PREF_PAYLOAD_SEP 0x1
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/**
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* struct p9_trans_module - transport module interface
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* @list: used to maintain a list of currently available transports
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* @name: the human-readable name of the transport
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* @maxsize: transport provided maximum packet size
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* @pref: Preferences of this transport
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* @def: set if this transport should be considered the default
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* @create: member function to create a new connection on this transport
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* @request: member function to issue a request to the transport
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* @cancel: member function to cancel a request (if it hasn't been sent)
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*
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* This is the basic API for a transport module which is registered by the
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* transport module with the 9P core network module and used by the client
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* to instantiate a new connection on a transport.
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*
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* BUGS: the transport module list isn't protected.
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*/
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struct p9_trans_module {
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struct list_head list;
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char *name; /* name of transport */
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int maxsize; /* max message size of transport */
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int pref; /* Preferences of this transport */
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int def; /* this transport should be default */
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struct module *owner;
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int (*create)(struct p9_client *, const char *, char *);
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void (*close) (struct p9_client *);
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int (*request) (struct p9_client *, struct p9_req_t *req);
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int (*cancel) (struct p9_client *, struct p9_req_t *req);
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};
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void v9fs_register_trans(struct p9_trans_module *m);
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void v9fs_unregister_trans(struct p9_trans_module *m);
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struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name);
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struct p9_trans_module *v9fs_get_default_trans(void);
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void v9fs_put_trans(struct p9_trans_module *m);
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#endif /* NET_9P_TRANSPORT_H */
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