blob: 81dbbf569bd4a0104387442b72e9ffd0463cde0f [file] [log] [blame]
Sven Eckelmann01d350d2016-05-15 11:07:44 +02001/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
2 *
3 * Marek Lindner, Simon Wunderlich
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include "main.h"
19
20#include <linux/errno.h>
21#include <linux/list.h>
22#include <linux/moduleparam.h>
23#include <linux/printk.h>
24#include <linux/seq_file.h>
25#include <linux/stddef.h>
26#include <linux/string.h>
27
28#include "bat_algo.h"
29
30char batadv_routing_algo[20] = "BATMAN_IV";
31static struct hlist_head batadv_algo_list;
32
33/**
34 * batadv_algo_init - Initialize batman-adv algorithm management data structures
35 */
36void batadv_algo_init(void)
37{
38 INIT_HLIST_HEAD(&batadv_algo_list);
39}
40
41static struct batadv_algo_ops *batadv_algo_get(char *name)
42{
43 struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
44
45 hlist_for_each_entry(bat_algo_ops_tmp, &batadv_algo_list, list) {
46 if (strcmp(bat_algo_ops_tmp->name, name) != 0)
47 continue;
48
49 bat_algo_ops = bat_algo_ops_tmp;
50 break;
51 }
52
53 return bat_algo_ops;
54}
55
56int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops)
57{
58 struct batadv_algo_ops *bat_algo_ops_tmp;
59
60 bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name);
61 if (bat_algo_ops_tmp) {
62 pr_info("Trying to register already registered routing algorithm: %s\n",
63 bat_algo_ops->name);
64 return -EEXIST;
65 }
66
67 /* all algorithms must implement all ops (for now) */
Antonio Quartulli29824a52016-05-25 23:27:31 +080068 if (!bat_algo_ops->iface.enable ||
69 !bat_algo_ops->iface.disable ||
70 !bat_algo_ops->iface.update_mac ||
71 !bat_algo_ops->iface.primary_set ||
72 !bat_algo_ops->neigh.cmp ||
73 !bat_algo_ops->neigh.is_similar_or_better) {
Sven Eckelmann01d350d2016-05-15 11:07:44 +020074 pr_info("Routing algo '%s' does not implement required ops\n",
75 bat_algo_ops->name);
76 return -EINVAL;
77 }
78
79 INIT_HLIST_NODE(&bat_algo_ops->list);
80 hlist_add_head(&bat_algo_ops->list, &batadv_algo_list);
81
82 return 0;
83}
84
85int batadv_algo_select(struct batadv_priv *bat_priv, char *name)
86{
87 struct batadv_algo_ops *bat_algo_ops;
88
89 bat_algo_ops = batadv_algo_get(name);
90 if (!bat_algo_ops)
91 return -EINVAL;
92
Antonio Quartulli29824a52016-05-25 23:27:31 +080093 bat_priv->algo_ops = bat_algo_ops;
Sven Eckelmann01d350d2016-05-15 11:07:44 +020094
95 return 0;
96}
97
98int batadv_algo_seq_print_text(struct seq_file *seq, void *offset)
99{
100 struct batadv_algo_ops *bat_algo_ops;
101
102 seq_puts(seq, "Available routing algorithms:\n");
103
104 hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) {
105 seq_printf(seq, " * %s\n", bat_algo_ops->name);
106 }
107
108 return 0;
109}
110
111static int batadv_param_set_ra(const char *val, const struct kernel_param *kp)
112{
113 struct batadv_algo_ops *bat_algo_ops;
114 char *algo_name = (char *)val;
115 size_t name_len = strlen(algo_name);
116
117 if (name_len > 0 && algo_name[name_len - 1] == '\n')
118 algo_name[name_len - 1] = '\0';
119
120 bat_algo_ops = batadv_algo_get(algo_name);
121 if (!bat_algo_ops) {
122 pr_err("Routing algorithm '%s' is not supported\n", algo_name);
123 return -EINVAL;
124 }
125
126 return param_set_copystring(algo_name, kp);
127}
128
129static const struct kernel_param_ops batadv_param_ops_ra = {
130 .set = batadv_param_set_ra,
131 .get = param_get_string,
132};
133
134static struct kparam_string batadv_param_string_ra = {
135 .maxlen = sizeof(batadv_routing_algo),
136 .string = batadv_routing_algo,
137};
138
139module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra,
140 0644);