xref: /freebsd/sys/fs/p9fs/p9_transport.c (revision e97ad33a89a78f55280b0485b3249ee9b907a718)
1 /*-
2  * Copyright (c) 2022-present Doug Rabson
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/param.h>
28 #include <sys/kernel.h>
29 #include <sys/kassert.h>
30 #include <sys/libkern.h>
31 
32 #include <fs/p9fs/p9_transport.h>
33 
34 TAILQ_HEAD(, p9_trans_module) transports;
35 
36 static void
p9_transport_init(void)37 p9_transport_init(void)
38 {
39 
40         TAILQ_INIT(&transports);
41 }
42 
43 SYSINIT(p9_transport, SI_SUB_DRIVERS, SI_ORDER_FIRST, p9_transport_init, NULL);
44 
45 void
p9_register_trans(struct p9_trans_module * m)46 p9_register_trans(struct p9_trans_module *m)
47 {
48 
49         TAILQ_INSERT_TAIL(&transports, m, link);
50 }
51 
52 void
p9_unregister_trans(struct p9_trans_module * m)53 p9_unregister_trans(struct p9_trans_module *m)
54 {
55 
56         TAILQ_REMOVE(&transports, m, link);
57 }
58 
59 struct p9_trans_module *
p9_get_trans_by_name(char * name)60 p9_get_trans_by_name(char *name)
61 {
62         struct p9_trans_module *m;
63 
64         TAILQ_FOREACH(m, &transports, link) {
65                 if (strcmp(m->name, name) == 0)
66                         return (m);
67         }
68         return (NULL);
69 }
70 
71