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batman-adv: Move soft-interface initialization to ndo_init
The initialization of an net_device object should be done in the init/constructor function and not from the outside after the register_netdevice was done to avoid race conditions. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Acked-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
This commit is contained in:
Sven Eckelmann
Antonio Quartulli
parent
e6a0b495ff
commit
37130293fd
@ -563,6 +563,11 @@ static int batadv_hard_if_event(struct notifier_block *this,
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struct batadv_hard_iface *primary_if = NULL;
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struct batadv_priv *bat_priv;
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if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) {
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batadv_sysfs_add_meshif(net_dev);
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return NOTIFY_DONE;
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}
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hard_iface = batadv_hardif_get_by_netdev(net_dev);
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if (!hard_iface && event == NETDEV_REGISTER)
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hard_iface = batadv_hardif_add_interface(net_dev);
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@ -401,55 +401,6 @@ static void batadv_set_lockdep_class(struct net_device *dev)
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netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
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}
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/**
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* batadv_softif_init - Late stage initialization of soft interface
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* @dev: registered network device to modify
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*
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* Returns error code on failures
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*/
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static int batadv_softif_init(struct net_device *dev)
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{
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batadv_set_lockdep_class(dev);
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return 0;
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}
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static const struct net_device_ops batadv_netdev_ops = {
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.ndo_init = batadv_softif_init,
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.ndo_open = batadv_interface_open,
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.ndo_stop = batadv_interface_release,
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.ndo_get_stats = batadv_interface_stats,
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.ndo_set_mac_address = batadv_interface_set_mac_addr,
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.ndo_change_mtu = batadv_interface_change_mtu,
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.ndo_start_xmit = batadv_interface_tx,
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.ndo_validate_addr = eth_validate_addr
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};
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static void batadv_interface_setup(struct net_device *dev)
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{
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struct batadv_priv *priv = netdev_priv(dev);
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ether_setup(dev);
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dev->netdev_ops = &batadv_netdev_ops;
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dev->destructor = free_netdev;
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dev->tx_queue_len = 0;
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/* can't call min_mtu, because the needed variables
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* have not been initialized yet
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*/
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dev->mtu = ETH_DATA_LEN;
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/* reserve more space in the skbuff for our header */
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dev->hard_header_len = BATADV_HEADER_LEN;
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/* generate random address */
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eth_hw_addr_random(dev);
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SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
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memset(priv, 0, sizeof(*priv));
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}
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/**
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* batadv_softif_destroy_finish - cleans up the remains of a softif
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* @work: work queue item
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@ -474,21 +425,22 @@ static void batadv_softif_destroy_finish(struct work_struct *work)
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rtnl_unlock();
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}
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struct net_device *batadv_softif_create(const char *name)
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/**
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* batadv_softif_init_late - late stage initialization of soft interface
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* @dev: registered network device to modify
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*
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* Returns error code on failures
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*/
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static int batadv_softif_init_late(struct net_device *dev)
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{
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struct net_device *soft_iface;
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struct batadv_priv *bat_priv;
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int ret;
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size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
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soft_iface = alloc_netdev(sizeof(*bat_priv), name,
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batadv_interface_setup);
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batadv_set_lockdep_class(dev);
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if (!soft_iface)
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goto out;
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bat_priv = netdev_priv(soft_iface);
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bat_priv->soft_iface = soft_iface;
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bat_priv = netdev_priv(dev);
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bat_priv->soft_iface = dev;
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INIT_WORK(&bat_priv->cleanup_work, batadv_softif_destroy_finish);
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/* batadv_interface_stats() needs to be available as soon as
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@ -496,14 +448,7 @@ struct net_device *batadv_softif_create(const char *name)
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*/
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bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
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if (!bat_priv->bat_counters)
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goto free_soft_iface;
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ret = register_netdevice(soft_iface);
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if (ret < 0) {
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pr_err("Unable to register the batman interface '%s': %i\n",
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name, ret);
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goto free_bat_counters;
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}
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return -ENOMEM;
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atomic_set(&bat_priv->aggregated_ogms, 1);
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atomic_set(&bat_priv->bonding, 0);
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@ -541,41 +486,89 @@ struct net_device *batadv_softif_create(const char *name)
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bat_priv->primary_if = NULL;
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bat_priv->num_ifaces = 0;
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ret = batadv_algo_select(bat_priv, batadv_routing_algo);
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if (ret < 0)
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goto unreg_soft_iface;
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batadv_nc_init_bat_priv(bat_priv);
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ret = batadv_sysfs_add_meshif(soft_iface);
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ret = batadv_algo_select(bat_priv, batadv_routing_algo);
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if (ret < 0)
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goto unreg_soft_iface;
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goto free_bat_counters;
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ret = batadv_debugfs_add_meshif(soft_iface);
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ret = batadv_debugfs_add_meshif(dev);
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if (ret < 0)
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goto unreg_sysfs;
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goto free_bat_counters;
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ret = batadv_mesh_init(soft_iface);
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ret = batadv_mesh_init(dev);
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if (ret < 0)
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goto unreg_debugfs;
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return soft_iface;
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return 0;
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unreg_debugfs:
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batadv_debugfs_del_meshif(soft_iface);
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unreg_sysfs:
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batadv_sysfs_del_meshif(soft_iface);
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unreg_soft_iface:
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free_percpu(bat_priv->bat_counters);
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unregister_netdevice(soft_iface);
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return NULL;
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batadv_debugfs_del_meshif(dev);
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free_bat_counters:
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free_percpu(bat_priv->bat_counters);
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free_soft_iface:
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free_netdev(soft_iface);
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out:
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return NULL;
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return ret;
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}
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static const struct net_device_ops batadv_netdev_ops = {
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.ndo_init = batadv_softif_init_late,
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.ndo_open = batadv_interface_open,
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.ndo_stop = batadv_interface_release,
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.ndo_get_stats = batadv_interface_stats,
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.ndo_set_mac_address = batadv_interface_set_mac_addr,
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.ndo_change_mtu = batadv_interface_change_mtu,
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.ndo_start_xmit = batadv_interface_tx,
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.ndo_validate_addr = eth_validate_addr
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};
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/**
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* batadv_softif_init_early - early stage initialization of soft interface
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* @dev: registered network device to modify
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*/
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static void batadv_softif_init_early(struct net_device *dev)
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{
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struct batadv_priv *priv = netdev_priv(dev);
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ether_setup(dev);
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dev->netdev_ops = &batadv_netdev_ops;
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dev->destructor = free_netdev;
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dev->tx_queue_len = 0;
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/* can't call min_mtu, because the needed variables
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* have not been initialized yet
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*/
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dev->mtu = ETH_DATA_LEN;
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/* reserve more space in the skbuff for our header */
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dev->hard_header_len = BATADV_HEADER_LEN;
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/* generate random address */
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eth_hw_addr_random(dev);
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SET_ETHTOOL_OPS(dev, &batadv_ethtool_ops);
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memset(priv, 0, sizeof(*priv));
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}
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struct net_device *batadv_softif_create(const char *name)
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{
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struct net_device *soft_iface;
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int ret;
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soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
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batadv_softif_init_early);
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if (!soft_iface)
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return NULL;
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ret = register_netdevice(soft_iface);
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if (ret < 0) {
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pr_err("Unable to register the batman interface '%s': %i\n",
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name, ret);
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free_netdev(soft_iface);
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return NULL;
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}
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return soft_iface;
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}
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void batadv_softif_destroy(struct net_device *soft_iface)
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