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9p.h	15.27 MB	View DL Edit
client.h	7.58 MB	View DL Edit
transport.h	2.31 MB	View DL Edit

Edit file: /usr/src/kernels/5.14.0-427.31.1.el9_4.x86_64/include/net/9p/transport.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Transport Definition
 *
 *  Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
 *  Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
 */

#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 */

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