Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 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> |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 30 | #include <linux/fs.h> |
| 31 | #include <linux/parser.h> |
| 32 | #include <net/9p/transport.h> |
| 33 | #include <linux/list.h> |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 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 | |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 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 |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 52 | * @m: structure describing the transport module and entry points |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 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 |
Eric Van Hensbergen | ee44399 | 2008-03-05 07:08:09 -0600 | [diff] [blame] | 65 | * @name: string identifying transport |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 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) |
Latchesar Ionkov | dd1a458 | 2007-11-06 08:02:53 -0600 | [diff] [blame] | 76 | return t; |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 77 | } |
Latchesar Ionkov | dd1a458 | 2007-11-06 08:02:53 -0600 | [diff] [blame] | 78 | return NULL; |
Eric Van Hensbergen | fb0466c3 | 2007-10-17 14:31:07 -0500 | [diff] [blame] | 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 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 100 | /** |
| 101 | * v9fs_init - Initialize module |
| 102 | * |
| 103 | */ |
| 104 | static int __init init_p9(void) |
| 105 | { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 106 | int ret = 0; |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 107 | |
| 108 | p9_error_init(); |
| 109 | printk(KERN_INFO "Installing 9P2000 support\n"); |
Eric Van Hensbergen | 887b3ec | 2008-05-08 20:26:37 -0500 | [diff] [blame] | 110 | p9_trans_fd_init(); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 111 | |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 112 | return ret; |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * v9fs_init - shutdown module |
| 117 | * |
| 118 | */ |
| 119 | |
| 120 | static void __exit exit_p9(void) |
| 121 | { |
Eric Van Hensbergen | 8a0dc95 | 2008-02-06 19:25:03 -0600 | [diff] [blame] | 122 | printk(KERN_INFO "Unloading 9P2000 support\n"); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 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"); |