Repository : ssh://git@open-mesh.org/batman-adv
On branch : maint
commit 586cf84b0ce6f9e8faa95e5f435de4be49a7eb88 Author: Matthias Schiffer mschiffer@universe-factory.net Date: Fri Sep 27 18:03:39 2013 +0200
batman-adv: set up network coding packet handlers during module init
batman-adv saves its table of packet handlers as a global state, so handlers must be set up only once (and setting them up a second time will fail).
The recently-added network coding support tries to set up its handler each time a new softif is registered, which obviously fails when more that one softif is used (and in consequence, the softif creation fails).
Fix this by splitting up batadv_nc_init into batadv_nc_init (which is called only once) and batadv_nc_mesh_init (which is called for each softif); in addition batadv_nc_free is renamed to batadv_nc_mesh_free to keep naming consistent.
Signed-off-by: Matthias Schiffer mschiffer@universe-factory.net Signed-off-by: Marek Lindner mareklindner@neomailbox.ch
586cf84b0ce6f9e8faa95e5f435de4be49a7eb88 main.c | 5 +++-- network-coding.c | 28 ++++++++++++++++++---------- network-coding.h | 14 ++++++++++---- 3 files changed, 31 insertions(+), 16 deletions(-)
diff --git a/main.c b/main.c index 08125f3..c8e0671 100644 --- a/main.c +++ b/main.c @@ -61,6 +61,7 @@ static int __init batadv_init(void) batadv_recv_handler_init();
batadv_iv_init(); + batadv_nc_init();
batadv_event_workqueue = create_singlethread_workqueue("bat_events");
@@ -138,7 +139,7 @@ int batadv_mesh_init(struct net_device *soft_iface) if (ret < 0) goto err;
- ret = batadv_nc_init(bat_priv); + ret = batadv_nc_mesh_init(bat_priv); if (ret < 0) goto err;
@@ -163,7 +164,7 @@ void batadv_mesh_free(struct net_device *soft_iface) batadv_vis_quit(bat_priv);
batadv_gw_node_purge(bat_priv); - batadv_nc_free(bat_priv); + batadv_nc_mesh_free(bat_priv); batadv_dat_free(bat_priv); batadv_bla_free(bat_priv);
diff --git a/network-coding.c b/network-coding.c index a487d46..4ecc0b6 100644 --- a/network-coding.c +++ b/network-coding.c @@ -35,6 +35,20 @@ static int batadv_nc_recv_coded_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if);
/** + * batadv_nc_init - one-time initialization for network coding + */ +int __init batadv_nc_init(void) +{ + int ret; + + /* Register our packet type */ + ret = batadv_recv_handler_register(BATADV_CODED, + batadv_nc_recv_coded_packet); + + return ret; +} + +/** * batadv_nc_start_timer - initialise the nc periodic worker * @bat_priv: the bat priv with all the soft interface information */ @@ -45,10 +59,10 @@ static void batadv_nc_start_timer(struct batadv_priv *bat_priv) }
/** - * batadv_nc_init - initialise coding hash table and start house keeping + * batadv_nc_mesh_init - initialise coding hash table and start house keeping * @bat_priv: the bat priv with all the soft interface information */ -int batadv_nc_init(struct batadv_priv *bat_priv) +int batadv_nc_mesh_init(struct batadv_priv *bat_priv) { bat_priv->nc.timestamp_fwd_flush = jiffies; bat_priv->nc.timestamp_sniffed_purge = jiffies; @@ -70,11 +84,6 @@ int batadv_nc_init(struct batadv_priv *bat_priv) batadv_hash_set_lock_class(bat_priv->nc.coding_hash, &batadv_nc_decoding_hash_lock_class_key);
- /* Register our packet type */ - if (batadv_recv_handler_register(BATADV_CODED, - batadv_nc_recv_coded_packet) < 0) - goto err; - INIT_DELAYED_WORK(&bat_priv->nc.work, batadv_nc_worker); batadv_nc_start_timer(bat_priv);
@@ -1721,12 +1730,11 @@ free_nc_packet: }
/** - * batadv_nc_free - clean up network coding memory + * batadv_nc_mesh_free - clean up network coding memory * @bat_priv: the bat priv with all the soft interface information */ -void batadv_nc_free(struct batadv_priv *bat_priv) +void batadv_nc_mesh_free(struct batadv_priv *bat_priv) { - batadv_recv_handler_unregister(BATADV_CODED); cancel_delayed_work_sync(&bat_priv->nc.work);
batadv_nc_purge_paths(bat_priv, bat_priv->nc.coding_hash, NULL); diff --git a/network-coding.h b/network-coding.h index 85a4ec8..ddfa618 100644 --- a/network-coding.h +++ b/network-coding.h @@ -22,8 +22,9 @@
#ifdef CONFIG_BATMAN_ADV_NC
-int batadv_nc_init(struct batadv_priv *bat_priv); -void batadv_nc_free(struct batadv_priv *bat_priv); +int batadv_nc_init(void); +int batadv_nc_mesh_init(struct batadv_priv *bat_priv); +void batadv_nc_mesh_free(struct batadv_priv *bat_priv); void batadv_nc_update_nc_node(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, struct batadv_orig_node *orig_neigh_node, @@ -46,12 +47,17 @@ int batadv_nc_init_debugfs(struct batadv_priv *bat_priv);
#else /* ifdef CONFIG_BATMAN_ADV_NC */
-static inline int batadv_nc_init(struct batadv_priv *bat_priv) +static inline int batadv_nc_init(void) { return 0; }
-static inline void batadv_nc_free(struct batadv_priv *bat_priv) +static inline int batadv_nc_mesh_init(struct batadv_priv *bat_priv) +{ + return 0; +} + +static inline void batadv_nc_mesh_free(struct batadv_priv *bat_priv) { return; }