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From 62a0fe46e2aaba1812d3cbcae014a41539f9eb09 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 9 Dec 2017 15:23:51 +0100
Subject: [PATCH 09/11] netfilter: core: pass hook number, family and device to
nf_find_hook_list()
Instead of passing struct nf_hook_ops, this is needed by follow up
patches to handle NFPROTO_INET from the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 36 +++++++++++++++++++-----------------
1 file changed, 19 insertions(+), 17 deletions(-)
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -262,36 +262,38 @@ out_assign:
return old;
}
-static struct nf_hook_entries __rcu **nf_hook_entry_head(struct net *net, const struct nf_hook_ops *reg)
+static struct nf_hook_entries __rcu **
+nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
+ struct net_device *dev)
{
- switch (reg->pf) {
+ switch (pf) {
case NFPROTO_NETDEV:
break;
#ifdef CONFIG_NETFILTER_FAMILY_ARP
case NFPROTO_ARP:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_arp) <= hooknum))
return NULL;
- return net->nf.hooks_arp + reg->hooknum;
+ return net->nf.hooks_arp + hooknum;
#endif
#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
case NFPROTO_BRIDGE:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_bridge) <= hooknum))
return NULL;
- return net->nf.hooks_bridge + reg->hooknum;
+ return net->nf.hooks_bridge + hooknum;
#endif
case NFPROTO_IPV4:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv4) <= hooknum))
return NULL;
- return net->nf.hooks_ipv4 + reg->hooknum;
+ return net->nf.hooks_ipv4 + hooknum;
case NFPROTO_IPV6:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= hooknum))
return NULL;
- return net->nf.hooks_ipv6 + reg->hooknum;
+ return net->nf.hooks_ipv6 + hooknum;
#if IS_ENABLED(CONFIG_DECNET)
case NFPROTO_DECNET:
- if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= reg->hooknum))
+ if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= hooknum))
return NULL;
- return net->nf.hooks_decnet + reg->hooknum;
+ return net->nf.hooks_decnet + hooknum;
#endif
default:
WARN_ON_ONCE(1);
@@ -299,9 +301,9 @@ static struct nf_hook_entries __rcu **nf
}
#ifdef CONFIG_NETFILTER_INGRESS
- if (reg->hooknum == NF_NETDEV_INGRESS) {
- if (reg->dev && dev_net(reg->dev) == net)
- return ®->dev->nf_hooks_ingress;
+ if (hooknum == NF_NETDEV_INGRESS) {
+ if (dev && dev_net(dev) == net)
+ return &dev->nf_hooks_ingress;
}
#endif
WARN_ON_ONCE(1);
@@ -323,7 +325,7 @@ int nf_register_net_hook(struct net *net
return -EINVAL;
}
- pp = nf_hook_entry_head(net, reg);
+ pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
if (!pp)
return -EINVAL;
@@ -397,7 +399,7 @@ void nf_unregister_net_hook(struct net *
struct nf_hook_entries __rcu **pp;
struct nf_hook_entries *p;
- pp = nf_hook_entry_head(net, reg);
+ pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
if (!pp)
return;
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