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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* include/net/9p/transport.h
*
* Transport Definition
*
* Copyright (C) 2005 by Latchesar Ionkov <[email protected]>
* Copyright (C) 2004-2008 by Eric Van Hensbergen <[email protected]>
*/
#ifndef NET_9P_TRANSPORT_H
#define NET_9P_TRANSPORT_H
#define P9_DEF_MIN_RESVPORT (665U)
#define P9_DEF_MAX_RESVPORT (1023U)
/**
* 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
* @close: member function to discard a connection on this transport
* @request: member function to issue a request to the transport
* @cancel: member function to cancel a request (if it hasn't been sent)
* @cancelled: member function to notify that a cancelled request will not
* receive a reply
*
* 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.
*
* The transport module list is protected by v9fs_trans_lock.
*/
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 module *owner;
int (*create)(struct p9_client *client,
const char *devname, char *args);
void (*close)(struct p9_client *client);
int (*request)(struct p9_client *client, struct p9_req_t *req);
int (*cancel)(struct p9_client *client, struct p9_req_t *req);
int (*cancelled)(struct p9_client *client, struct p9_req_t *req);
int (*zc_request)(struct p9_client *client, struct p9_req_t *req,
struct iov_iter *uidata, struct iov_iter *uodata,
int inlen, int outlen, int in_hdr_len);
int (*show_options)(struct seq_file *m, struct p9_client *client);
};
void v9fs_register_trans(struct p9_trans_module *m);
void v9fs_unregister_trans(struct p9_trans_module *m);
struct p9_trans_module *v9fs_get_trans_by_name(char *s);
struct p9_trans_module *v9fs_get_default_trans(void);
void v9fs_put_trans(struct p9_trans_module *m);
#endif /* NET_9P_TRANSPORT_H */