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Date: Sun, 14 Jun 2015 22:13:07 -0500
From: "Eric W. Biederman" <ebiederm@...ssion.com>
To: David Miller <davem@...emloft.net>
Cc: <netdev@...r.kernel.org>, netfilter-devel@...r.kernel.org,
Stephen Hemminger <stephen@...workplumber.org>,
Juanjo Ciarlante <jjciarla@...z.uncu.edu.ar>,
Wensong Zhang <wensong@...ux-vs.org>,
Simon Horman <horms@...ge.net.au>,
Julian Anastasov <ja@....bg>,
Pablo Neira Ayuso <pablo@...filter.org>,
Patrick McHardy <kaber@...sh.net>,
Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
Jamal Hadi Salim <jhs@...atatu.com>,
Steffen Klassert <steffen.klassert@...unet.com>,
Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH net-next 09/15] x_tables: Pass struct net in xt_action_param
As xt_action_param lives on the stack this does not bloat any
persistent data structures.
This is a first step in making netfilter code that needs to know
which network namespace it is executing in simpler.
Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
---
include/linux/netfilter/x_tables.h | 2 ++
include/net/netfilter/nf_tables.h | 1 +
net/bridge/netfilter/ebtables.c | 1 +
net/ipv4/netfilter/arp_tables.c | 1 +
net/ipv4/netfilter/ip_tables.c | 1 +
net/ipv6/netfilter/ip6_tables.c | 1 +
net/sched/act_ipt.c | 1 +
net/sched/em_ipset.c | 1 +
8 files changed, 9 insertions(+)
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 09f38206c18f..1499520f2ee0 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -12,6 +12,7 @@
* @target: the target extension
* @matchinfo: per-match data
* @targetinfo: per-target data
+ * @net network namespace of through which the action was invoked
* @in: input netdevice
* @out: output netdevice
* @fragoff: packet is a fragment, this is the data offset
@@ -33,6 +34,7 @@ struct xt_action_param {
union {
const void *matchinfo, *targinfo;
};
+ struct net *net;
const struct net_device *in, *out;
int fragoff;
unsigned int thoff;
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index dd20bbdcdf6f..7b3d7c79ecdc 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -30,6 +30,7 @@ static inline void nft_set_pktinfo(struct nft_pktinfo *pkt,
const struct nf_hook_state *state)
{
pkt->skb = skb;
+ pkt->xt.net = state->net;
pkt->in = pkt->xt.in = state->in;
pkt->out = pkt->xt.out = state->out;
pkt->hook = pkt->xt.hooknum = state->hook;
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 9c0230583e90..21e869b09c2b 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -200,6 +200,7 @@ unsigned int ebt_do_table(struct sk_buff *skb,
struct xt_action_param acpar;
acpar.family = NFPROTO_BRIDGE;
+ acpar.net = state->net;
acpar.in = state->in;
acpar.out = state->out;
acpar.hotdrop = false;
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 97ab571e4325..401628da5168 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -280,6 +280,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
e = get_entry(table_base, private->hook_entry[hook]);
back = get_entry(table_base, private->underflow[hook]);
+ acpar.net = state->net;
acpar.in = state->in;
acpar.out = state->out;
acpar.hooknum = hook;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index b2958fe20255..c3564b934f92 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -316,6 +316,7 @@ ipt_do_table(struct sk_buff *skb,
acpar.fragoff = ntohs(ip->frag_off) & IP_OFFSET;
acpar.thoff = ip_hdrlen(skb);
acpar.hotdrop = false;
+ acpar.net = state->net;
acpar.in = state->in;
acpar.out = state->out;
acpar.family = NFPROTO_IPV4;
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 37b6f0a48deb..bed8f68a6eac 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -341,6 +341,7 @@ ip6t_do_table(struct sk_buff *skb,
* rule is also a fragment-specific rule, non-fragments won't
* match it. */
acpar.hotdrop = false;
+ acpar.net = state->net;
acpar.in = state->in;
acpar.out = state->out;
acpar.family = NFPROTO_IPV6;
diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c
index cbc8dd7dd48a..b08faaa7161a 100644
--- a/net/sched/act_ipt.c
+++ b/net/sched/act_ipt.c
@@ -189,6 +189,7 @@ static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
* worry later - danger - this API seems to have changed
* from earlier kernels
*/
+ par.net = dev_net(skb->dev);
par.in = skb->dev;
par.out = NULL;
par.hooknum = ipt->tcfi_hook;
diff --git a/net/sched/em_ipset.c b/net/sched/em_ipset.c
index df0328ba6a48..c66ca9400ab4 100644
--- a/net/sched/em_ipset.c
+++ b/net/sched/em_ipset.c
@@ -95,6 +95,7 @@ static int em_ipset_match(struct sk_buff *skb, struct tcf_ematch *em,
if (skb->skb_iif)
indev = dev_get_by_index_rcu(em->net, skb->skb_iif);
+ acpar.net = em->net;
acpar.in = indev ? indev : dev;
acpar.out = dev;
--
2.2.1
--
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