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bd238fb4 LI |
1 | /* |
2 | * net/9p/9p.c | |
3 | * | |
4 | * 9P entry point | |
5 | * | |
6 | * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> | |
7 | * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> | |
8 | * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 | |
12 | * as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to: | |
21 | * Free Software Foundation | |
22 | * 51 Franklin Street, Fifth Floor | |
23 | * Boston, MA 02111-1301 USA | |
24 | * | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
29 | #include <net/9p/9p.h> | |
fb0466c3 EVH |
30 | #include <linux/fs.h> |
31 | #include <linux/parser.h> | |
32 | #include <net/9p/transport.h> | |
33 | #include <linux/list.h> | |
bd238fb4 LI |
34 | |
35 | #ifdef CONFIG_NET_9P_DEBUG | |
36 | unsigned int p9_debug_level = 0; /* feature-rific global debug level */ | |
37 | EXPORT_SYMBOL(p9_debug_level); | |
38 | module_param_named(debug, p9_debug_level, uint, 0); | |
39 | MODULE_PARM_DESC(debug, "9P debugging level"); | |
40 | #endif | |
41 | ||
fb0466c3 EVH |
42 | /* |
43 | * Dynamic Transport Registration Routines | |
44 | * | |
45 | */ | |
46 | ||
47 | static LIST_HEAD(v9fs_trans_list); | |
48 | static struct p9_trans_module *v9fs_default_transport; | |
49 | ||
50 | /** | |
51 | * v9fs_register_trans - register a new transport with 9p | |
ee443996 | 52 | * @m: structure describing the transport module and entry points |
fb0466c3 EVH |
53 | * |
54 | */ | |
55 | void v9fs_register_trans(struct p9_trans_module *m) | |
56 | { | |
57 | list_add_tail(&m->list, &v9fs_trans_list); | |
58 | if (m->def) | |
59 | v9fs_default_transport = m; | |
60 | } | |
61 | EXPORT_SYMBOL(v9fs_register_trans); | |
62 | ||
63 | /** | |
64 | * v9fs_match_trans - match transport versus registered transports | |
ee443996 | 65 | * @name: string identifying transport |
fb0466c3 EVH |
66 | * |
67 | */ | |
68 | struct p9_trans_module *v9fs_match_trans(const substring_t *name) | |
69 | { | |
70 | struct list_head *p; | |
71 | struct p9_trans_module *t = NULL; | |
72 | ||
73 | list_for_each(p, &v9fs_trans_list) { | |
74 | t = list_entry(p, struct p9_trans_module, list); | |
75 | if (strncmp(t->name, name->from, name->to-name->from) == 0) | |
dd1a4584 | 76 | return t; |
fb0466c3 | 77 | } |
dd1a4584 | 78 | return NULL; |
fb0466c3 EVH |
79 | } |
80 | EXPORT_SYMBOL(v9fs_match_trans); | |
81 | ||
82 | /** | |
83 | * v9fs_default_trans - returns pointer to default transport | |
84 | * | |
85 | */ | |
86 | ||
87 | struct p9_trans_module *v9fs_default_trans(void) | |
88 | { | |
89 | if (v9fs_default_transport) | |
90 | return v9fs_default_transport; | |
91 | else if (!list_empty(&v9fs_trans_list)) | |
92 | return list_first_entry(&v9fs_trans_list, | |
93 | struct p9_trans_module, list); | |
94 | else | |
95 | return NULL; | |
96 | } | |
97 | EXPORT_SYMBOL(v9fs_default_trans); | |
98 | ||
99 | ||
bd238fb4 LI |
100 | /** |
101 | * v9fs_init - Initialize module | |
102 | * | |
103 | */ | |
104 | static int __init init_p9(void) | |
105 | { | |
8a0dc95f | 106 | int ret = 0; |
bd238fb4 LI |
107 | |
108 | p9_error_init(); | |
109 | printk(KERN_INFO "Installing 9P2000 support\n"); | |
887b3ece | 110 | p9_trans_fd_init(); |
bd238fb4 | 111 | |
bd238fb4 LI |
112 | return ret; |
113 | } | |
114 | ||
115 | /** | |
116 | * v9fs_init - shutdown module | |
117 | * | |
118 | */ | |
119 | ||
120 | static void __exit exit_p9(void) | |
121 | { | |
8a0dc95f | 122 | printk(KERN_INFO "Unloading 9P2000 support\n"); |
bd238fb4 LI |
123 | } |
124 | ||
125 | module_init(init_p9) | |
126 | module_exit(exit_p9) | |
127 | ||
128 | MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); | |
129 | MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); | |
130 | MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); | |
131 | MODULE_LICENSE("GPL"); |