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TOMOYO Linux Cross Reference
Linux/include/net/9p/transport.h

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  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 };
 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(char *s);
 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 

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