1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * include/net/9p/transport.h 4 * 5 * Transport Definition 6 * 7 * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> 8 * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> 9 */ 10 11 #ifndef NET_9P_TRANSPORT_H 12 #define NET_9P_TRANSPORT_H 13 14 #define P9_DEF_MIN_RESVPORT (665U) 15 #define P9_DEF_MAX_RESVPORT (1023U) 16 17 /** 18 * struct p9_trans_module - transport module interface 19 * @list: used to maintain a list of currently available transports 20 * @name: the human-readable name of the transport 21 * @maxsize: transport provided maximum packet size 22 * @def: set if this transport should be considered the default 23 * @create: member function to create a new connection on this transport 24 * @close: member function to discard a connection on this transport 25 * @request: member function to issue a request to the transport 26 * @cancel: member function to cancel a request (if it hasn't been sent) 27 * @cancelled: member function to notify that a cancelled request will not 28 * not receive a reply 29 * 30 * This is the basic API for a transport module which is registered by the 31 * transport module with the 9P core network module and used by the client 32 * to instantiate a new connection on a transport. 33 * 34 * The transport module list is protected by v9fs_trans_lock. 35 */ 36 37 struct p9_trans_module { 38 struct list_head list; 39 char *name; /* name of transport */ 40 int maxsize; /* max message size of transport */ 41 int def; /* this transport should be default */ 42 struct module *owner; 43 int (*create)(struct p9_client *, const char *, char *); 44 void (*close) (struct p9_client *); 45 int (*request) (struct p9_client *, struct p9_req_t *req); 46 int (*cancel) (struct p9_client *, struct p9_req_t *req); 47 int (*cancelled)(struct p9_client *, struct p9_req_t *req); 48 int (*zc_request)(struct p9_client *, struct p9_req_t *, 49 struct iov_iter *, struct iov_iter *, int , int, int); 50 int (*show_options)(struct seq_file *, struct p9_client *); 51 }; 52 53 void v9fs_register_trans(struct p9_trans_module *m); 54 void v9fs_unregister_trans(struct p9_trans_module *m); 55 struct p9_trans_module *v9fs_get_trans_by_name(char *s); 56 struct p9_trans_module *v9fs_get_default_trans(void); 57 void v9fs_put_trans(struct p9_trans_module *m); 58 #endif /* NET_9P_TRANSPORT_H */ 59