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| author | Florian Westphal <fw@strlen.de> | 2015-04-02 14:31:45 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-04-08 16:49:12 +0200 |
| commit | a1e67951e6c0b11bb11c256f8e1c45ed51fcd760 (patch) | |
| tree | 20b03a8d9b4546ca32369612e5ca5a0723277c4f /net/bridge | |
| parent | 3eaf402502e49ad9c58c73e8599c7c4f345d62da (diff) | |
| download | linux-a1e67951e6c0b11bb11c256f8e1c45ed51fcd760.tar.gz linux-a1e67951e6c0b11bb11c256f8e1c45ed51fcd760.tar.bz2 linux-a1e67951e6c0b11bb11c256f8e1c45ed51fcd760.zip | |
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')
| -rw-r--r-- | net/bridge/br_netfilter.c | 18 |
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); |