141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "main.h"
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/moduleparam.h>
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#include <linux/printk.h>
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#include <linux/seq_file.h>
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#include <linux/stddef.h>
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#include <linux/string.h>
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#include "bat_algo.h"
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char batadv_routing_algo[20] = "BATMAN_IV";
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static struct hlist_head batadv_algo_list;
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/**
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* batadv_algo_init - Initialize batman-adv algorithm management data structures
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*/
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void batadv_algo_init(void)
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{
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INIT_HLIST_HEAD(&batadv_algo_list);
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}
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static struct batadv_algo_ops *batadv_algo_get(char *name)
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{
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struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp;
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hlist_for_each_entry(bat_algo_ops_tmp, &batadv_algo_list, list) {
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if (strcmp(bat_algo_ops_tmp->name, name) != 0)
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continue;
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bat_algo_ops = bat_algo_ops_tmp;
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break;
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}
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return bat_algo_ops;
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}
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int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops)
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{
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struct batadv_algo_ops *bat_algo_ops_tmp;
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bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name);
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if (bat_algo_ops_tmp) {
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pr_info("Trying to register already registered routing algorithm: %s\n",
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bat_algo_ops->name);
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return -EEXIST;
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}
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/* all algorithms must implement all ops (for now) */
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if (!bat_algo_ops->iface.enable ||
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!bat_algo_ops->iface.disable ||
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!bat_algo_ops->iface.update_mac ||
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!bat_algo_ops->iface.primary_set ||
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!bat_algo_ops->neigh.cmp ||
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!bat_algo_ops->neigh.is_similar_or_better) {
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pr_info("Routing algo '%s' does not implement required ops\n",
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bat_algo_ops->name);
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return -EINVAL;
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}
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INIT_HLIST_NODE(&bat_algo_ops->list);
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hlist_add_head(&bat_algo_ops->list, &batadv_algo_list);
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return 0;
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}
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int batadv_algo_select(struct batadv_priv *bat_priv, char *name)
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{
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struct batadv_algo_ops *bat_algo_ops;
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bat_algo_ops = batadv_algo_get(name);
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if (!bat_algo_ops)
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return -EINVAL;
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bat_priv->algo_ops = bat_algo_ops;
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return 0;
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}
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int batadv_algo_seq_print_text(struct seq_file *seq, void *offset)
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{
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struct batadv_algo_ops *bat_algo_ops;
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seq_puts(seq, "Available routing algorithms:\n");
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hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) {
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seq_printf(seq, " * %s\n", bat_algo_ops->name);
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}
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return 0;
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}
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static int batadv_param_set_ra(const char *val, const struct kernel_param *kp)
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{
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struct batadv_algo_ops *bat_algo_ops;
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char *algo_name = (char *)val;
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size_t name_len = strlen(algo_name);
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if (name_len > 0 && algo_name[name_len - 1] == '\n')
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algo_name[name_len - 1] = '\0';
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bat_algo_ops = batadv_algo_get(algo_name);
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if (!bat_algo_ops) {
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pr_err("Routing algorithm '%s' is not supported\n", algo_name);
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return -EINVAL;
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}
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return param_set_copystring(algo_name, kp);
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}
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static const struct kernel_param_ops batadv_param_ops_ra = {
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.set = batadv_param_set_ra,
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.get = param_get_string,
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};
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static struct kparam_string batadv_param_string_ra = {
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.maxlen = sizeof(batadv_routing_algo),
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.string = batadv_routing_algo,
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};
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module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra,
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0644);
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