diff options
| -rw-r--r-- | net/batman-adv/sysfs.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c index e78bd7f2f276..02d96f224c60 100644 --- a/net/batman-adv/sysfs.c +++ b/net/batman-adv/sysfs.c @@ -429,6 +429,13 @@ static ssize_t batadv_show_gw_mode(struct kobject *kobj, struct attribute *attr, struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); int bytes_written; + /* GW mode is not available if the routing algorithm in use does not + * implement the GW API + */ + if (!bat_priv->algo_ops->gw.get_best_gw_node || + !bat_priv->algo_ops->gw.is_eligible) + return -ENOENT; + switch (atomic_read(&bat_priv->gw.mode)) { case BATADV_GW_MODE_CLIENT: bytes_written = sprintf(buff, "%s\n", @@ -456,6 +463,13 @@ static ssize_t batadv_store_gw_mode(struct kobject *kobj, char *curr_gw_mode_str; int gw_mode_tmp = -1; + /* toggling GW mode is allowed only if the routing algorithm in use + * provides the GW API + */ + if (!bat_priv->algo_ops->gw.get_best_gw_node || + !bat_priv->algo_ops->gw.is_eligible) + return -EINVAL; + if (buff[count - 1] == '\n') buff[count - 1] = '\0'; @@ -520,6 +534,13 @@ static ssize_t batadv_show_gw_sel_class(struct kobject *kobj, { struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + /* GW selection class is not available if the routing algorithm in use + * does not implement the GW API + */ + if (!bat_priv->algo_ops->gw.get_best_gw_node || + !bat_priv->algo_ops->gw.is_eligible) + return -ENOENT; + if (bat_priv->algo_ops->gw.show_sel_class) return bat_priv->algo_ops->gw.show_sel_class(bat_priv, buff); @@ -532,6 +553,13 @@ static ssize_t batadv_store_gw_sel_class(struct kobject *kobj, { struct batadv_priv *bat_priv = batadv_kobj_to_batpriv(kobj); + /* setting the GW selection class is allowed only if the routing + * algorithm in use implements the GW API + */ + if (!bat_priv->algo_ops->gw.get_best_gw_node || + !bat_priv->algo_ops->gw.is_eligible) + return -EINVAL; + if (buff[count - 1] == '\n') buff[count - 1] = '\0'; |