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| author |   Florian Westphal <fw@strlen.de> | 2015-07-14 17:51:07 +0200 |
|---|---|---|
| committer |   Pablo Neira Ayuso <pablo@netfilter.org> | 2015-07-15 18:18:05 +0200 |
| commit | e7c8899f3e6f2830136cf6e115c4a55ce7a3920a (patch) | |
| tree | 69361fc86865dd5aae94836f3af466711cf67494 /net/netfilter/xt_TEE.c | |
| parent | netfilter: xtables: compute exact size needed for jumpstack (diff) | |
| download | linux-dev-e7c8899f3e6f2830136cf6e115c4a55ce7a3920a.tar.xz linux-dev-e7c8899f3e6f2830136cf6e115c4a55ce7a3920a.zip | |
netfilter: move tee_active to core
This prepares for a TEE like expression in nftables.
We want to ensure only one duplicate is sent, so both will
use the same percpu variable to detect duplication.
The other use case is detection of recursive call to xtables, but since
we don't want dependency from nft to xtables core its put into core.c
instead of the x_tables core.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/xt_TEE.c')
| -rw-r--r-- | net/netfilter/xt_TEE.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/netfilter/xt_TEE.c b/net/netfilter/xt_TEE.c index a747eb475b68..8950e79c4dc9 100644 --- a/net/netfilter/xt_TEE.c +++ b/net/netfilter/xt_TEE.c @@ -37,7 +37,6 @@ struct xt_tee_priv { }; static const union nf_inet_addr tee_zero_address; -static DEFINE_PER_CPU(bool, tee_active); static struct net *pick_net(struct sk_buff *skb) { @@ -88,7 +87,7 @@ tee_tg4(struct sk_buff *skb, const struct xt_action_param *par) const struct xt_tee_tginfo *info = par->targinfo; struct iphdr *iph; - if (__this_cpu_read(tee_active)) + if (__this_cpu_read(nf_skb_duplicated)) return XT_CONTINUE; /* * Copy the skb, and route the copy. Will later return %XT_CONTINUE for @@ -125,9 +124,9 @@ tee_tg4(struct sk_buff *skb, const struct xt_action_param *par) ip_send_check(iph); if (tee_tg_route4(skb, info)) { - __this_cpu_write(tee_active, true); + __this_cpu_write(nf_skb_duplicated, true); ip_local_out(skb); - __this_cpu_write(tee_active, false); + __this_cpu_write(nf_skb_duplicated, false); } else { kfree_skb(skb); } @@ -170,7 +169,7 @@ tee_tg6(struct sk_buff *skb, const struct xt_action_param *par) { const struct xt_tee_tginfo *info = par->targinfo; - if (__this_cpu_read(tee_active)) + if (__this_cpu_read(nf_skb_duplicated)) return XT_CONTINUE; skb = pskb_copy(skb, GFP_ATOMIC); if (skb == NULL) @@ -188,9 +187,9 @@ tee_tg6(struct sk_buff *skb, const struct xt_action_param *par) --iph->hop_limit; } if (tee_tg_route6(skb, info)) { - __this_cpu_write(tee_active, true); + __this_cpu_write(nf_skb_duplicated, true); ip6_local_out(skb); - __this_cpu_write(tee_active, false); + __this_cpu_write(nf_skb_duplicated, false); } else { kfree_skb(skb); } |