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Date: Sat, 24 Nov 2012 01:02:06 +0100
From: Sven Eckelmann <sven@...fation.org>
To: b.a.t.m.a.n@...ts.open-mesh.org
Cc: netdev@...r.kernel.org, davem@...emloft.net,
Sven Eckelmann <sven@...fation.org>
Subject: [PATCH 1/7] 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@...fation.org>
---
net/batman-adv/hard-interface.c | 5 ++
net/batman-adv/soft-interface.c | 147 ++++++++++++++++++---------------------
2 files changed, 73 insertions(+), 79 deletions(-)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 365ed74..50f4a5c 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -542,6 +542,11 @@ static int batadv_hard_if_event(struct notifier_block *this,
struct batadv_hard_iface *primary_if = NULL;
struct batadv_priv *bat_priv;
+ if (batadv_softif_is_valid(net_dev) && event == NETDEV_REGISTER) {
+ batadv_sysfs_add_meshif(net_dev);
+ return NOTIFY_DONE;
+ }
+
hard_iface = batadv_hardif_get_by_netdev(net_dev);
if (!hard_iface && event == NETDEV_REGISTER)
hard_iface = batadv_hardif_add_interface(net_dev);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 54800c7..b545595 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -407,9 +407,73 @@ static void batadv_set_lockdep_class(struct net_device *dev)
*/
static int batadv_softif_init(struct net_device *dev)
{
+ struct batadv_priv *bat_priv;
+ int ret;
+ size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
+
batadv_set_lockdep_class(dev);
+ bat_priv = netdev_priv(dev);
+
+ /* batadv_interface_stats() needs to be available as soon as
+ * register_netdevice() has been called
+ */
+ bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
+ if (!bat_priv->bat_counters)
+ return -ENOMEM;
+
+ atomic_set(&bat_priv->aggregated_ogms, 1);
+ atomic_set(&bat_priv->bonding, 0);
+ atomic_set(&bat_priv->bridge_loop_avoidance, 0);
+#ifdef CONFIG_BATMAN_ADV_DAT
+ atomic_set(&bat_priv->distributed_arp_table, 1);
+#endif
+ atomic_set(&bat_priv->ap_isolation, 0);
+ atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
+ atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
+ atomic_set(&bat_priv->gw_sel_class, 20);
+ atomic_set(&bat_priv->gw_bandwidth, 41);
+ atomic_set(&bat_priv->orig_interval, 1000);
+ atomic_set(&bat_priv->hop_penalty, 30);
+ atomic_set(&bat_priv->log_level, 0);
+ atomic_set(&bat_priv->fragmentation, 1);
+ atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
+ atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
+
+ atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
+ atomic_set(&bat_priv->bcast_seqno, 1);
+ atomic_set(&bat_priv->tt.vn, 0);
+ atomic_set(&bat_priv->tt.local_changes, 0);
+ atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
+#ifdef CONFIG_BATMAN_ADV_BLA
+ atomic_set(&bat_priv->bla.num_requests, 0);
+#endif
+ bat_priv->tt.last_changeset = NULL;
+ bat_priv->tt.last_changeset_len = 0;
+
+ bat_priv->primary_if = NULL;
+ bat_priv->num_ifaces = 0;
+
+ ret = batadv_algo_select(bat_priv, batadv_routing_algo);
+ if (ret < 0)
+ goto free_bat_counters;
+
+ ret = batadv_debugfs_add_meshif(dev);
+ if (ret < 0)
+ goto free_bat_counters;
+
+ ret = batadv_mesh_init(dev);
+ if (ret < 0)
+ goto unreg_debugfs;
+
return 0;
+
+unreg_debugfs:
+ batadv_debugfs_del_meshif(dev);
+free_bat_counters:
+ free_percpu(bat_priv->bat_counters);
+
+ return ret;
}
static const struct net_device_ops batadv_netdev_ops = {
@@ -451,97 +515,22 @@ static void batadv_interface_setup(struct net_device *dev)
struct net_device *batadv_softif_create(const char *name)
{
struct net_device *soft_iface;
- struct batadv_priv *bat_priv;
int ret;
- size_t cnt_len = sizeof(uint64_t) * BATADV_CNT_NUM;
- soft_iface = alloc_netdev(sizeof(*bat_priv), name,
+ soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
batadv_interface_setup);
-
if (!soft_iface)
- goto out;
-
- bat_priv = netdev_priv(soft_iface);
-
- /* batadv_interface_stats() needs to be available as soon as
- * register_netdevice() has been called
- */
- bat_priv->bat_counters = __alloc_percpu(cnt_len, __alignof__(uint64_t));
- if (!bat_priv->bat_counters)
- goto free_soft_iface;
+ return NULL;
ret = register_netdevice(soft_iface);
if (ret < 0) {
pr_err("Unable to register the batman interface '%s': %i\n",
name, ret);
- goto free_bat_counters;
+ free_netdev(soft_iface);
+ return NULL;
}
- atomic_set(&bat_priv->aggregated_ogms, 1);
- atomic_set(&bat_priv->bonding, 0);
- atomic_set(&bat_priv->bridge_loop_avoidance, 0);
-#ifdef CONFIG_BATMAN_ADV_DAT
- atomic_set(&bat_priv->distributed_arp_table, 1);
-#endif
- atomic_set(&bat_priv->ap_isolation, 0);
- atomic_set(&bat_priv->vis_mode, BATADV_VIS_TYPE_CLIENT_UPDATE);
- atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF);
- atomic_set(&bat_priv->gw_sel_class, 20);
- atomic_set(&bat_priv->gw_bandwidth, 41);
- atomic_set(&bat_priv->orig_interval, 1000);
- atomic_set(&bat_priv->hop_penalty, 30);
- atomic_set(&bat_priv->log_level, 0);
- atomic_set(&bat_priv->fragmentation, 1);
- atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
- atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
-
- atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
- atomic_set(&bat_priv->bcast_seqno, 1);
- atomic_set(&bat_priv->tt.vn, 0);
- atomic_set(&bat_priv->tt.local_changes, 0);
- atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
-#ifdef CONFIG_BATMAN_ADV_BLA
- atomic_set(&bat_priv->bla.num_requests, 0);
-#endif
- bat_priv->tt.last_changeset = NULL;
- bat_priv->tt.last_changeset_len = 0;
-
- bat_priv->primary_if = NULL;
- bat_priv->num_ifaces = 0;
-
- ret = batadv_algo_select(bat_priv, batadv_routing_algo);
- if (ret < 0)
- goto unreg_soft_iface;
-
- ret = batadv_sysfs_add_meshif(soft_iface);
- if (ret < 0)
- goto unreg_soft_iface;
-
- ret = batadv_debugfs_add_meshif(soft_iface);
- if (ret < 0)
- goto unreg_sysfs;
-
- ret = batadv_mesh_init(soft_iface);
- if (ret < 0)
- goto unreg_debugfs;
-
return soft_iface;
-
-unreg_debugfs:
- batadv_debugfs_del_meshif(soft_iface);
-unreg_sysfs:
- batadv_sysfs_del_meshif(soft_iface);
-unreg_soft_iface:
- free_percpu(bat_priv->bat_counters);
- unregister_netdevice(soft_iface);
- return NULL;
-
-free_bat_counters:
- free_percpu(bat_priv->bat_counters);
-free_soft_iface:
- free_netdev(soft_iface);
-out:
- return NULL;
}
void batadv_softif_destroy(struct net_device *soft_iface)
--
1.7.10.4
--
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