diff options
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 16 | ||||
| -rw-r--r-- | include/linux/netfilter_bridge.h | 2 | ||||
| -rw-r--r-- | net/bridge/br_netfilter.c | 5 | ||||
| -rw-r--r-- | net/netfilter/xt_physdev.c | 15 |
4 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 9d3a0775a11d..87851efb0228 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -258,3 +258,19 @@ Why: These drivers never compiled since they were added to the kernel Who: Jean Delvare <khali@linux-fr.org> --------------------------- + +What: Bridge netfilter deferred IPv4/IPv6 output hook calling +When: January 2007 +Why: The deferred output hooks are a layering violation causing unusual + and broken behaviour on bridge devices. Examples of things they + break include QoS classifation using the MARK or CLASSIFY targets, + the IPsec policy match and connection tracking with VLANs on a + bridge. Their only use is to enable bridge output port filtering + within iptables with the physdev match, which can also be done by + combining iptables and ebtables using netfilter marks. Until it + will get removed the hook deferral is disabled by default and is + only enabled when needed. + +Who: Patrick McHardy <kaber@trash.net> + +--------------------------- diff --git a/include/linux/netfilter_bridge.h b/include/linux/netfilter_bridge.h index 87764022cc67..31f02ba036ce 100644 --- a/include/linux/netfilter_bridge.h +++ b/include/linux/netfilter_bridge.h @@ -79,6 +79,8 @@ struct bridge_skb_cb { __u32 ipv4; } daddr; }; + +extern int brnf_deferred_hooks; #endif /* CONFIG_BRIDGE_NETFILTER */ #endif /* __KERNEL__ */ diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index cbc8a389a0a8..05b3de888243 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -61,6 +61,9 @@ static int brnf_filter_vlan_tagged = 1; #define brnf_filter_vlan_tagged 1 #endif +int brnf_deferred_hooks; +EXPORT_SYMBOL_GPL(brnf_deferred_hooks); + static __be16 inline vlan_proto(const struct sk_buff *skb) { return vlan_eth_hdr(skb)->h_vlan_encapsulated_proto; @@ -890,6 +893,8 @@ static unsigned int ip_sabotage_out(unsigned int hook, struct sk_buff **pskb, return NF_ACCEPT; else if (ip->version == 6 && !brnf_call_ip6tables) return NF_ACCEPT; + else if (!brnf_deferred_hooks) + return NF_ACCEPT; #endif if (hook == NF_IP_POST_ROUTING) return NF_ACCEPT; diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c index 5fe4c9df17f5..a9f4f6f3c628 100644 --- a/net/netfilter/xt_physdev.c +++ b/net/netfilter/xt_physdev.c @@ -113,6 +113,21 @@ checkentry(const char *tablename, if (!(info->bitmask & XT_PHYSDEV_OP_MASK) || info->bitmask & ~XT_PHYSDEV_OP_MASK) return 0; + if (brnf_deferred_hooks == 0 && + info->bitmask & XT_PHYSDEV_OP_OUT && + (!(info->bitmask & XT_PHYSDEV_OP_BRIDGED) || + info->invert & XT_PHYSDEV_OP_BRIDGED) && + hook_mask & ((1 << NF_IP_LOCAL_OUT) | (1 << NF_IP_FORWARD) | + (1 << NF_IP_POST_ROUTING))) { + printk(KERN_WARNING "physdev match: using --physdev-out in the " + "OUTPUT, FORWARD and POSTROUTING chains for non-bridged " + "traffic is deprecated and breaks other things, it will " + "be removed in January 2007. See Documentation/" + "feature-removal-schedule.txt for details. This doesn't " + "affect you in case you're using it for purely bridged " + "traffic.\n"); + brnf_deferred_hooks = 1; + } return 1; } |