From: Rusty Russell <rusty@rustcorp•com.au>
To: Dan Carpenter <dan.carpenter@oracle•com>
Cc: netdev@vger•kernel.org, netfilter-devel@vger•kernel.org
Subject: [PATCH] netfilter: remove forward module param confusion.
Date: Fri, 23 Mar 2012 08:57:06 +1030 [thread overview]
Message-ID: <8739909sqt.fsf@rustcorp.com.au> (raw)
In-Reply-To: <8762dw9to2.fsf@rustcorp.com.au>
It used to be an int, and it got changed to a bool parameter at least
7 years ago. It happens that NF_ACCEPT and NF_DROP are 0 and 1, so
this works, but it's unclear, and the check that it's in range is not
required.
Reported-by: Dan Carpenter <dan.carpenter@oracle•com>
Signed-off-by: Rusty Russell <rusty@rustcorp•com.au>
---
net/ipv4/netfilter/iptable_filter.c | 9 ++-------
net/ipv6/netfilter/ip6table_filter.c | 9 ++-------
2 files changed, 4 insertions(+), 14 deletions(-)
diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c
--- a/net/ipv4/netfilter/iptable_filter.c
+++ b/net/ipv4/netfilter/iptable_filter.c
@@ -52,7 +52,7 @@ iptable_filter_hook(unsigned int hook, s
static struct nf_hook_ops *filter_ops __read_mostly;
/* Default to forward because I got too much mail already. */
-static bool forward = NF_ACCEPT;
+static bool forward = true;
module_param(forward, bool, 0000);
static int __net_init iptable_filter_net_init(struct net *net)
@@ -64,7 +64,7 @@ static int __net_init iptable_filter_net
return -ENOMEM;
/* Entry 1 is the FORWARD hook */
((struct ipt_standard *)repl->entries)[1].target.verdict =
- -forward - 1;
+ forward ? -NF_ACCEPT - 1 : -NF_DROP - 1;
net->ipv4.iptable_filter =
ipt_register_table(net, &packet_filter, repl);
@@ -88,11 +88,6 @@ static int __init iptable_filter_init(vo
{
int ret;
- if (forward < 0 || forward > NF_MAX_VERDICT) {
- pr_err("iptables forward must be 0 or 1\n");
- return -EINVAL;
- }
-
ret = register_pernet_subsys(&iptable_filter_net_ops);
if (ret < 0)
return ret;
diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c
--- a/net/ipv6/netfilter/ip6table_filter.c
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -44,7 +44,7 @@ ip6table_filter_hook(unsigned int hook,
static struct nf_hook_ops *filter_ops __read_mostly;
/* Default to forward because I got too much mail already. */
-static bool forward = NF_ACCEPT;
+static bool forward = true;
module_param(forward, bool, 0000);
static int __net_init ip6table_filter_net_init(struct net *net)
@@ -56,7 +56,7 @@ static int __net_init ip6table_filter_ne
return -ENOMEM;
/* Entry 1 is the FORWARD hook */
((struct ip6t_standard *)repl->entries)[1].target.verdict =
- -forward - 1;
+ forward ? -NF_ACCEPT - 1 : -NF_DROP - 1;
net->ipv6.ip6table_filter =
ip6t_register_table(net, &packet_filter, repl);
@@ -80,11 +80,6 @@ static int __init ip6table_filter_init(v
{
int ret;
- if (forward < 0 || forward > NF_MAX_VERDICT) {
- pr_err("iptables forward must be 0 or 1\n");
- return -EINVAL;
- }
-
ret = register_pernet_subsys(&ip6table_filter_net_ops);
if (ret < 0)
return ret;
--
How could I marry someone with more hair than me? http://baldalex.org
next prev parent reply other threads:[~2012-03-22 22:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-22 18:26 module_param: make bool parameters really bool (net & drivers/net) Dan Carpenter
2012-03-22 18:30 ` Dan Carpenter
2012-03-22 22:07 ` Rusty Russell
2012-03-22 22:27 ` Rusty Russell [this message]
2012-03-23 2:36 ` [PATCH] netfilter: remove forward module param confusion David Miller
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