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authorFlorian Westphal <fw@strlen.de>2015-04-02 14:31:45 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2015-04-08 16:49:12 +0200
commita1e67951e6c0b11bb11c256f8e1c45ed51fcd760 (patch)
tree20b03a8d9b4546ca32369612e5ca5a0723277c4f /net/bridge/br_netfilter.c
parent3eaf402502e49ad9c58c73e8599c7c4f345d62da (diff)
netfilter: bridge: make BRNF_PKT_TYPE flag a bool
nf_bridge_info->mask is used for several things, for example to remember if skb->pkt_type was set to OTHER_HOST. For a bridge, OTHER_HOST is expected case. For ip forward its a non-starter though -- routing expects PACKET_HOST. Bridge netfilter thus changes OTHER_HOST to PACKET_HOST before hook invocation and then un-does it after hook traversal. This information is irrelevant outside of br_netfilter. After this change, ->mask now only contains flags that need to be known outside of br_netfilter in fast-path. Future patch changes mask into a 2bit state field in sk_buff, so that we can remove skb->nf_bridge pointer for good and consider all remaining places that access nf_bridge info content a not-so fastpath. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/bridge/br_netfilter.c')
-rw-r--r--net/bridge/br_netfilter.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index ab1e988ca4b8..e8ac7432acb6 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -282,9 +282,9 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
- if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
- nf_bridge->mask ^= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = false;
}
nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
@@ -415,9 +415,9 @@ static int br_nf_pre_routing_finish(struct sk_buff *skb)
frag_max_size = IPCB(skb)->frag_max_size;
BR_INPUT_SKB_CB(skb)->frag_max_size = frag_max_size;
- if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
- nf_bridge->mask ^= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = false;
}
nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
if (dnat_took_place(skb)) {
@@ -503,7 +503,7 @@ static struct net_device *setup_pre_routing(struct sk_buff *skb)
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
- nf_bridge->mask |= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = true;
}
nf_bridge->mask |= BRNF_NF_BRIDGE_PREROUTING;
@@ -711,9 +711,9 @@ static int br_nf_forward_finish(struct sk_buff *skb)
}
in = nf_bridge->physindev;
- if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
- nf_bridge->mask ^= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = false;
}
nf_bridge_update_protocol(skb);
} else {
@@ -769,7 +769,7 @@ static unsigned int br_nf_forward_ip(const struct nf_hook_ops *ops,
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
- nf_bridge->mask |= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = true;
}
if (pf == NFPROTO_IPV4) {
@@ -927,7 +927,7 @@ static unsigned int br_nf_post_routing(const struct nf_hook_ops *ops,
* about the value of skb->pkt_type. */
if (skb->pkt_type == PACKET_OTHERHOST) {
skb->pkt_type = PACKET_HOST;
- nf_bridge->mask |= BRNF_PKT_TYPE;
+ nf_bridge->pkt_otherhost = true;
}
nf_bridge_pull_encap_header(skb);

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