From 1cf51900f8545b358b5deaacfda348d990f671db Mon Sep 17 00:00:00 2001 From: Pablo Neira Date: Wed, 13 May 2015 18:19:37 +0200 Subject: [PATCH] net: add CONFIG_NET_INGRESS to enable ingress filtering This new config switch enables the ingress filtering infrastructure that is controlled through the ingress_needed static key. This prepares the introduction of the Netfilter ingress hook that resides under this unique static key. Note that CONFIG_SCH_INGRESS automatically selects this, that should be no problem since this also depends on CONFIG_NET_CLS_ACT. Signed-off-by: Pablo Neira Ayuso Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- include/linux/rtnetlink.h | 2 +- net/Kconfig | 3 +++ net/core/dev.c | 7 ++++--- net/sched/Kconfig | 1 + 4 files changed, 9 insertions(+), 4 deletions(-) diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index bd29ab4..a2324fb 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -79,7 +79,7 @@ static inline struct netdev_queue *dev_ingress_queue(struct net_device *dev) struct netdev_queue *dev_ingress_queue_create(struct net_device *dev); -#ifdef CONFIG_NET_CLS_ACT +#ifdef CONFIG_NET_INGRESS void net_inc_ingress_queue(void); void net_dec_ingress_queue(void); #endif diff --git a/net/Kconfig b/net/Kconfig index 44dd578..57a7c5a 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -45,6 +45,9 @@ config COMPAT_NETLINK_MESSAGES Newly written code should NEVER need this option but do compat-independent messages instead! +config NET_INGRESS + bool + menu "Networking options" source "net/packet/Kconfig" diff --git a/net/core/dev.c b/net/core/dev.c index af54906..a5ef900 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1630,7 +1630,7 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev) } EXPORT_SYMBOL(call_netdevice_notifiers); -#ifdef CONFIG_NET_CLS_ACT +#ifdef CONFIG_NET_INGRESS static struct static_key ingress_needed __read_mostly; void net_inc_ingress_queue(void) @@ -3798,13 +3798,14 @@ another_round: } skip_taps: -#ifdef CONFIG_NET_CLS_ACT +#ifdef CONFIG_NET_INGRESS if (static_key_false(&ingress_needed)) { skb = handle_ing(skb, &pt_prev, &ret, orig_dev); if (!skb) goto unlock; } - +#endif +#ifdef CONFIG_NET_CLS_ACT skb->tc_verd = 0; ncls: #endif diff --git a/net/sched/Kconfig b/net/sched/Kconfig index 5fd1c2f..daa3343 100644 --- a/net/sched/Kconfig +++ b/net/sched/Kconfig @@ -312,6 +312,7 @@ config NET_SCH_PIE config NET_SCH_INGRESS tristate "Ingress Qdisc" depends on NET_CLS_ACT + select NET_INGRESS ---help--- Say Y here if you want to use classifiers for incoming packets. If unsure, say Y. -- 2.7.4