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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 | ||
42 | extern int p9_mux_global_init(void); | |
43 | extern void p9_mux_global_exit(void); | |
bd238fb4 | 44 | |
fb0466c3 EVH |
45 | /* |
46 | * Dynamic Transport Registration Routines | |
47 | * | |
48 | */ | |
49 | ||
50 | static LIST_HEAD(v9fs_trans_list); | |
51 | static struct p9_trans_module *v9fs_default_transport; | |
52 | ||
53 | /** | |
54 | * v9fs_register_trans - register a new transport with 9p | |
55 | * @m - structure describing the transport module and entry points | |
56 | * | |
57 | */ | |
58 | void v9fs_register_trans(struct p9_trans_module *m) | |
59 | { | |
60 | list_add_tail(&m->list, &v9fs_trans_list); | |
61 | if (m->def) | |
62 | v9fs_default_transport = m; | |
63 | } | |
64 | EXPORT_SYMBOL(v9fs_register_trans); | |
65 | ||
66 | /** | |
67 | * v9fs_match_trans - match transport versus registered transports | |
68 | * @arg: string identifying transport | |
69 | * | |
70 | */ | |
71 | struct p9_trans_module *v9fs_match_trans(const substring_t *name) | |
72 | { | |
73 | struct list_head *p; | |
74 | struct p9_trans_module *t = NULL; | |
75 | ||
76 | list_for_each(p, &v9fs_trans_list) { | |
77 | t = list_entry(p, struct p9_trans_module, list); | |
78 | if (strncmp(t->name, name->from, name->to-name->from) == 0) | |
dd1a4584 | 79 | return t; |
fb0466c3 | 80 | } |
dd1a4584 | 81 | return NULL; |
fb0466c3 EVH |
82 | } |
83 | EXPORT_SYMBOL(v9fs_match_trans); | |
84 | ||
85 | /** | |
86 | * v9fs_default_trans - returns pointer to default transport | |
87 | * | |
88 | */ | |
89 | ||
90 | struct p9_trans_module *v9fs_default_trans(void) | |
91 | { | |
92 | if (v9fs_default_transport) | |
93 | return v9fs_default_transport; | |
94 | else if (!list_empty(&v9fs_trans_list)) | |
95 | return list_first_entry(&v9fs_trans_list, | |
96 | struct p9_trans_module, list); | |
97 | else | |
98 | return NULL; | |
99 | } | |
100 | EXPORT_SYMBOL(v9fs_default_trans); | |
101 | ||
102 | ||
bd238fb4 LI |
103 | /** |
104 | * v9fs_init - Initialize module | |
105 | * | |
106 | */ | |
107 | static int __init init_p9(void) | |
108 | { | |
8a0dc95f | 109 | int ret = 0; |
bd238fb4 LI |
110 | |
111 | p9_error_init(); | |
112 | printk(KERN_INFO "Installing 9P2000 support\n"); | |
bd238fb4 | 113 | |
bd238fb4 LI |
114 | return ret; |
115 | } | |
116 | ||
117 | /** | |
118 | * v9fs_init - shutdown module | |
119 | * | |
120 | */ | |
121 | ||
122 | static void __exit exit_p9(void) | |
123 | { | |
8a0dc95f | 124 | printk(KERN_INFO "Unloading 9P2000 support\n"); |
bd238fb4 LI |
125 | } |
126 | ||
127 | module_init(init_p9) | |
128 | module_exit(exit_p9) | |
129 | ||
130 | MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); | |
131 | MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); | |
132 | MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); | |
133 | MODULE_LICENSE("GPL"); |