mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
01d205d936
This is a preparatory change for the subsequent patch: the RDMA transport pulls the buffers for its 9p response messages from a shared pool. [1] So this case has to be considered when choosing an appropriate response message size in the subsequent patch. Link: https://lore.kernel.org/all/Ys3jjg52EIyITPua@codewreck.org/ [1] Link: https://lkml.kernel.org/r/79d24310226bc4eb037892b5c097ec4ad4819a03.1657920926.git.linux_oss@crudebyte.com Signed-off-by: Christian Schoenebeck <linux_oss@crudebyte.com> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
70 lines
2.7 KiB
C
70 lines
2.7 KiB
C
/* 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
|
|
|
|
#include <linux/module.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
|
|
* @pooled_rbuffers: currently only set for RDMA transport which pulls the
|
|
* response buffers from a shared pool, and accordingly
|
|
* we're less flexible when choosing the response message
|
|
* size in this case
|
|
* @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 */
|
|
bool pooled_rbuffers;
|
|
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(const char *s);
|
|
struct p9_trans_module *v9fs_get_default_trans(void);
|
|
void v9fs_put_trans(struct p9_trans_module *m);
|
|
|
|
#define MODULE_ALIAS_9P(transport) \
|
|
MODULE_ALIAS("9p-" transport)
|
|
|
|
#endif /* NET_9P_TRANSPORT_H */
|