From: Marek Lindner Date: Sat, 4 Sep 2010 23:58:27 +0000 (+0200) Subject: Staging: batman-adv: register the batman-adv packet type per interface X-Git-Tag: firefly_0821_release~7613^2~3583^2~3^2~696 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=15cf5523d2e42f755b3b1d8ea0fa601ffcf8b9e7;p=firefly-linux-kernel-4.4.55.git Staging: batman-adv: register the batman-adv packet type per interface Batman-adv globally registered the batman-adv packet type and installed a hook to batman_skb_recv(). Each interface receiving a packet with that type would end up in this function which then had to loop through all batman-adv internal interface structures to find the its meta data. The more interfaces a system had the longer the loops might take. Each and every packet goes through this function making it a performance critical loop. This patch installs the hook for each activated interface. The called batman_skb_recv() can distinguish these calls, therefore avoiding the loop through the interface structures. Signed-off-by: Marek Lindner [sven.eckelmann@gmx.de: Rework on top of current version] Signed-off-by: Sven Eckelmann Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index 82d3d554467b..f33c73f72d59 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -265,6 +265,11 @@ int hardif_enable_interface(struct batman_if *batman_if) batman_if->if_status = IF_INACTIVE; orig_hash_add_if(batman_if, bat_priv->num_ifaces); + batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN); + batman_if->batman_adv_ptype.func = batman_skb_recv; + batman_if->batman_adv_ptype.dev = batman_if->net_dev; + dev_add_pack(&batman_if->batman_adv_ptype); + atomic_set(&batman_if->seqno, 1); atomic_set(&batman_if->frag_seqno, 1); bat_info(soft_device, "Adding interface: %s\n", batman_if->dev); @@ -319,6 +324,8 @@ void hardif_disable_interface(struct batman_if *batman_if) return; bat_info(soft_device, "Removing interface: %s\n", batman_if->dev); + dev_remove_pack(&batman_if->batman_adv_ptype); + bat_priv->num_ifaces--; orig_hash_del_if(batman_if, bat_priv->num_ifaces); @@ -468,6 +475,7 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, struct batman_if *batman_if; int ret; + batman_if = container_of(ptype, struct batman_if, batman_adv_ptype); skb = skb_share_check(skb, GFP_ATOMIC); /* skb was released by skb_share_check() */ @@ -486,10 +494,6 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, || !skb_mac_header(skb))) goto err_free; - batman_if = get_batman_if_by_netdev(skb->dev); - if (!batman_if) - goto err_free; - /* discard frames on not active interfaces */ if (batman_if->if_status != IF_ACTIVE) goto err_free; diff --git a/drivers/staging/batman-adv/main.c b/drivers/staging/batman-adv/main.c index c0a3373a08a0..eb0bfbe50e35 100644 --- a/drivers/staging/batman-adv/main.c +++ b/drivers/staging/batman-adv/main.c @@ -49,11 +49,6 @@ struct net_device *soft_device; unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; atomic_t module_state; -static struct packet_type batman_adv_packet_type __read_mostly = { - .type = __constant_htons(ETH_P_BATMAN), - .func = batman_skb_recv, -}; - struct workqueue_struct *bat_event_workqueue; static int __init batman_init(void) @@ -103,7 +98,6 @@ static int __init batman_init(void) goto unreg_sysfs; register_netdevice_notifier(&hard_if_notifier); - dev_add_pack(&batman_adv_packet_type); pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) " "loaded\n", SOURCE_VERSION, REVISION_VERSION_STR, @@ -140,8 +134,6 @@ static void __exit batman_exit(void) soft_device = NULL; } - dev_remove_pack(&batman_adv_packet_type); - destroy_workqueue(bat_event_workqueue); bat_event_workqueue = NULL; } @@ -185,8 +177,6 @@ void deactivate_module(void) vis_quit(); - /* TODO: unregister BATMAN pack */ - originator_free(); hna_local_free(); diff --git a/drivers/staging/batman-adv/types.h b/drivers/staging/batman-adv/types.h index ac165753e848..2b06944a56b5 100644 --- a/drivers/staging/batman-adv/types.h +++ b/drivers/staging/batman-adv/types.h @@ -46,7 +46,7 @@ struct batman_if { int packet_len; struct kobject *hardif_obj; struct rcu_head rcu; - + struct packet_type batman_adv_ptype; }; /**