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Date: Mon, 14 May 2012 16:52:24 +0800
From: Gao feng <gaofeng@...fujitsu.com>
To: pablo@...filter.org
Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
serge.hallyn@...onical.com, ebiederm@...ssion.com,
dlezcano@...ibm.com, Gao feng <gaofeng@...fujitsu.com>
Subject: [PATCH 14/17] netfilter: adjust l4proto_gre4 to the nf_conntrack_l4proto_register
move the nf_conntrack_l4proto_register from module_init to
proto_gre_net_ops.init.
and use gre_pernet to replace net_generic.
because gre proto has no sysctl,so only need to initial pernet data
for gre proto.
Acked-by: Eric W. Biederman <ebiederm@...ssion.com>
Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
net/netfilter/nf_conntrack_proto_gre.c | 56 ++++++++++++++++++++------------
1 files changed, 35 insertions(+), 21 deletions(-)
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index 132f0d2..8d70452 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -54,13 +54,20 @@ static unsigned int gre_timeouts[GRE_CT_MAX] = {
static int proto_gre_net_id __read_mostly;
struct netns_proto_gre {
+ struct nf_proto_net nf;
rwlock_t keymap_lock;
struct list_head keymap_list;
+ unsigned int gre_timeouts[GRE_CT_MAX];
};
+static inline struct netns_proto_gre *gre_pernet(struct net *net)
+{
+ return net_generic(net, proto_gre_net_id);
+}
+
void nf_ct_gre_keymap_flush(struct net *net)
{
- struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
+ struct netns_proto_gre *net_gre = gre_pernet(net);
struct nf_ct_gre_keymap *km, *tmp;
write_lock_bh(&net_gre->keymap_lock);
@@ -85,7 +92,7 @@ static inline int gre_key_cmpfn(const struct nf_ct_gre_keymap *km,
/* look up the source key for a given tuple */
static __be16 gre_keymap_lookup(struct net *net, struct nf_conntrack_tuple *t)
{
- struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
+ struct netns_proto_gre *net_gre = gre_pernet(net);
struct nf_ct_gre_keymap *km;
__be16 key = 0;
@@ -109,7 +116,7 @@ int nf_ct_gre_keymap_add(struct nf_conn *ct, enum ip_conntrack_dir dir,
struct nf_conntrack_tuple *t)
{
struct net *net = nf_ct_net(ct);
- struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
+ struct netns_proto_gre *net_gre = gre_pernet(net);
struct nf_conn_help *help = nfct_help(ct);
struct nf_ct_gre_keymap **kmp, *km;
@@ -150,7 +157,7 @@ EXPORT_SYMBOL_GPL(nf_ct_gre_keymap_add);
void nf_ct_gre_keymap_destroy(struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
- struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
+ struct netns_proto_gre *net_gre = gre_pernet(net);
struct nf_conn_help *help = nfct_help(ct);
enum ip_conntrack_dir dir;
@@ -237,7 +244,7 @@ static int gre_print_conntrack(struct seq_file *s, struct nf_conn *ct)
static unsigned int *gre_get_timeouts(struct net *net)
{
- return gre_timeouts;
+ return gre_pernet(net)->gre_timeouts;
}
/* Returns verdict for packet, and may modify conntrack */
@@ -339,6 +346,18 @@ gre_timeout_nla_policy[CTA_TIMEOUT_GRE_MAX+1] = {
};
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
+static int gre_init_net(struct net *net, u_int8_t compat)
+{
+ int i;
+ struct netns_proto_gre *net_gre = gre_pernet(net);
+
+ rwlock_init(&net_gre->keymap_lock);
+ INIT_LIST_HEAD(&net_gre->keymap_list);
+ for (i = 0; i < GRE_CT_MAX; i++)
+ net_gre->gre_timeouts[i] = gre_timeouts[i];
+ return 0;
+}
+
/* protocol helper struct */
static struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 __read_mostly = {
.l3proto = AF_INET,
@@ -368,20 +387,24 @@ static struct nf_conntrack_l4proto nf_conntrack_l4proto_gre4 __read_mostly = {
.nla_policy = gre_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
+ .net_id = &proto_gre_net_id,
+ .init_net = gre_init_net,
};
static int proto_gre_net_init(struct net *net)
{
- struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
-
- rwlock_init(&net_gre->keymap_lock);
- INIT_LIST_HEAD(&net_gre->keymap_list);
-
- return 0;
+ int ret = 0;
+ ret = nf_conntrack_l4proto_register(net,
+ &nf_conntrack_l4proto_gre4);
+ if (ret < 0)
+ pr_err("nf_conntrack_l4proto_gre4 :protocol register failed.\n");
+ return ret;
}
static void proto_gre_net_exit(struct net *net)
{
+ nf_conntrack_l4proto_unregister(net,
+ &nf_conntrack_l4proto_gre4);
nf_ct_gre_keymap_flush(net);
}
@@ -394,20 +417,11 @@ static struct pernet_operations proto_gre_net_ops = {
static int __init nf_ct_proto_gre_init(void)
{
- int rv;
-
- rv = nf_conntrack_l4proto_register(&init_net, &nf_conntrack_l4proto_gre4);
- if (rv < 0)
- return rv;
- rv = register_pernet_subsys(&proto_gre_net_ops);
- if (rv < 0)
- nf_conntrack_l4proto_unregister(&init_net, &nf_conntrack_l4proto_gre4);
- return rv;
+ return register_pernet_subsys(&proto_gre_net_ops);
}
static void __exit nf_ct_proto_gre_fini(void)
{
- nf_conntrack_l4proto_unregister(&init_net, &nf_conntrack_l4proto_gre4);
unregister_pernet_subsys(&proto_gre_net_ops);
}
--
1.7.7.6
--
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