From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Subject: [PATCH nf-next,v2 4/7] netfilter: core: support for NFPROTO_INET hook registration
Date: Sun, 10 Dec 2017 21:34:52 +0100 [thread overview]
Message-ID: <20171210203455.11651-5-pablo@netfilter.org> (raw)
In-Reply-To: <20171210203455.11651-1-pablo@netfilter.org>
Expand NFPROTO_INET in two hook registrations, one for NFPROTO_IPV4 and
another for NFPROTO_IPV6. Hence, we handle NFPROTO_INET from the core.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/core.c | 53 +++++++++++++++++++++++++++++++++++++++++++---------
1 file changed, 44 insertions(+), 9 deletions(-)
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 6c9874c8b10a..606efc9b14e1 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -316,12 +316,13 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
return NULL;
}
-int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
+static int __nf_register_net_hook(struct net *net, int pf,
+ const struct nf_hook_ops *reg)
{
struct nf_hook_entries *p, *new_hooks;
struct nf_hook_entries __rcu **pp;
- if (reg->pf == NFPROTO_NETDEV) {
+ if (pf == NFPROTO_NETDEV) {
#ifndef CONFIG_NETFILTER_INGRESS
if (reg->hooknum == NF_NETDEV_INGRESS)
return -EOPNOTSUPP;
@@ -331,7 +332,7 @@ int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
return -EINVAL;
}
- pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
+ pp = nf_hook_entry_head(net, pf, reg->hooknum, reg->dev);
if (!pp)
return -EINVAL;
@@ -349,17 +350,16 @@ int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
hooks_validate(new_hooks);
#ifdef CONFIG_NETFILTER_INGRESS
- if (reg->pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
+ if (pf == NFPROTO_NETDEV && reg->hooknum == NF_NETDEV_INGRESS)
net_inc_ingress_queue();
#endif
#ifdef HAVE_JUMP_LABEL
- static_key_slow_inc(&nf_hooks_needed[reg->pf][reg->hooknum]);
+ static_key_slow_inc(&nf_hooks_needed[pf][reg->hooknum]);
#endif
BUG_ON(p == new_hooks);
nf_hook_entries_free(p);
return 0;
}
-EXPORT_SYMBOL(nf_register_net_hook);
/*
* nf_remove_net_hook - remove a hook from blob
@@ -400,12 +400,13 @@ static void nf_remove_net_hook(struct nf_hook_entries *old,
}
}
-void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
+void __nf_unregister_net_hook(struct net *net, int pf,
+ const struct nf_hook_ops *reg)
{
struct nf_hook_entries __rcu **pp;
struct nf_hook_entries *p;
- pp = nf_hook_entry_head(net, reg->pf, reg->hooknum, reg->dev);
+ pp = nf_hook_entry_head(net, pf, reg->hooknum, reg->dev);
if (!pp)
return;
@@ -417,7 +418,7 @@ void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
return;
}
- nf_remove_net_hook(p, reg, reg->pf);
+ nf_remove_net_hook(p, reg, pf);
p = __nf_hook_entries_try_shrink(pp);
mutex_unlock(&nf_hook_mutex);
@@ -427,8 +428,42 @@ void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
nf_queue_nf_hook_drop(net);
nf_hook_entries_free(p);
}
+
+void nf_unregister_net_hook(struct net *net, const struct nf_hook_ops *reg)
+{
+ if (reg->pf == NFPROTO_INET) {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ __nf_unregister_net_hook(net, NFPROTO_IPV6, reg);
+ } else {
+ __nf_unregister_net_hook(net, reg->pf, reg);
+ }
+}
EXPORT_SYMBOL(nf_unregister_net_hook);
+int nf_register_net_hook(struct net *net, const struct nf_hook_ops *reg)
+{
+ int err;
+
+ if (reg->pf == NFPROTO_INET) {
+ err = __nf_register_net_hook(net, NFPROTO_IPV4, reg);
+ if (err < 0)
+ return err;
+
+ err = __nf_register_net_hook(net, NFPROTO_IPV6, reg);
+ if (err < 0) {
+ __nf_unregister_net_hook(net, NFPROTO_IPV4, reg);
+ return err;
+ }
+ } else {
+ err = __nf_register_net_hook(net, reg->pf, reg);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(nf_register_net_hook);
+
int nf_register_net_hooks(struct net *net, const struct nf_hook_ops *reg,
unsigned int n)
{
--
2.11.0
next prev parent reply other threads:[~2017-12-10 20:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-10 20:34 [PATCH nf-next,v2 0/7] handle NFPROTO_INET from core Pablo Neira Ayuso
2017-12-10 20:34 ` [PATCH nf-next,v2 1/7] netfilter: core: add nf_remove_net_hook Pablo Neira Ayuso
2017-12-10 20:34 ` [PATCH nf-next,v2 2/7] netfilter: core: pass hook number, family and device to nf_find_hook_list() Pablo Neira Ayuso
2017-12-10 20:34 ` [PATCH nf-next,v2 3/7] netfilter: core: pass family as parameter to nf_remove_net_hook() Pablo Neira Ayuso
2017-12-10 20:34 ` Pablo Neira Ayuso [this message]
2017-12-10 20:34 ` [PATCH nf-next,v2 5/7] netfilter: nf_tables_inet: don't use multihook infrastructure anymore Pablo Neira Ayuso
2017-12-10 20:34 ` [PATCH nf-next,v2 6/7] netfilter: nf_tables: remove multihook chains and families Pablo Neira Ayuso
2017-12-10 20:34 ` [PATCH nf-next,v2 7/7] netfilter: nf_tables: remove hooks from family definition Pablo Neira Ayuso
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171210203455.11651-5-pablo@netfilter.org \
--to=pablo@netfilter.org \
--cc=netfilter-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).