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01d350d1 SE |
1 | /* 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 | ||
30 | char batadv_routing_algo[20] = "BATMAN_IV"; | |
31 | static struct hlist_head batadv_algo_list; | |
32 | ||
33 | /** | |
34 | * batadv_algo_init - Initialize batman-adv algorithm management data structures | |
35 | */ | |
36 | void batadv_algo_init(void) | |
37 | { | |
38 | INIT_HLIST_HEAD(&batadv_algo_list); | |
39 | } | |
40 | ||
41 | static 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 | ||
56 | int 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) */ | |
29824a55 AQ |
68 | 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) { | |
01d350d1 SE |
74 | 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 | ||
85 | int 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 | ||
29824a55 | 93 | bat_priv->algo_ops = bat_algo_ops; |
01d350d1 SE |
94 | |
95 | return 0; | |
96 | } | |
97 | ||
98 | int 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 | ||
111 | static 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 | ||
129 | static const struct kernel_param_ops batadv_param_ops_ra = { | |
130 | .set = batadv_param_set_ra, | |
131 | .get = param_get_string, | |
132 | }; | |
133 | ||
134 | static struct kparam_string batadv_param_string_ra = { | |
135 | .maxlen = sizeof(batadv_routing_algo), | |
136 | .string = batadv_routing_algo, | |
137 | }; | |
138 | ||
139 | module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, | |
140 | 0644); |