Module specific data moved into per-net site and being allocated/freed
during net namespace creation/deletion.
Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
---
net/netfilter/nf_conntrack_proto_udplite.c | 118 ++++++++++++++++++++++++-----
1 file changed, 99 insertions(+), 19 deletions(-)
Index: linux-2.6.git/net/netfilter/nf_conntrack_proto_udplite.c
===================================================================
--- linux-2.6.git.orig/net/netfilter/nf_conntrack_proto_udplite.c
+++ linux-2.6.git/net/netfilter/nf_conntrack_proto_udplite.c
@@ -17,6 +17,9 @@
#include <net/ip6_checksum.h>
#include <net/checksum.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
@@ -24,8 +27,21 @@
#include <net/netfilter/nf_conntrack_ecache.h>
#include <net/netfilter/nf_log.h>
-static unsigned int nf_ct_udplite_timeout __read_mostly = 30*HZ;
-static unsigned int nf_ct_udplite_timeout_stream __read_mostly = 180*HZ;
+/* this module per-net specifics */
+static int udplite_net_id;
+struct udplite_net {
+ unsigned int udplite_timeout;
+ unsigned int udplite_timeout_stream;
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_header *sysctl_header;
+ struct ctl_table *sysctl_table;
+#endif
+};
+
+static inline struct udplite_net *udplite_pernet(struct net *net)
+{
+ return net_generic(net, udplite_net_id);
+}
static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
unsigned int dataoff,
@@ -68,16 +84,18 @@ static int udplite_packet(struct nf_conn
u_int8_t pf,
unsigned int hooknum)
{
+ struct udplite_net *un = udplite_pernet(nf_ct_net(ct));
+
/* If we've seen traffic both ways, this is some kind of UDP
stream. Extend timeout. */
if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
nf_ct_refresh_acct(ct, ctinfo, skb,
- nf_ct_udplite_timeout_stream);
+ un->udplite_timeout_stream);
/* Also, more likely to be important, and not a probe */
if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
nf_conntrack_event_cache(IPCT_STATUS, ct);
} else
- nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_udplite_timeout);
+ nf_ct_refresh_acct(ct, ctinfo, skb, un->udplite_timeout);
return NF_ACCEPT;
}
@@ -142,13 +160,14 @@ static int udplite_error(struct net *net
}
#ifdef CONFIG_SYSCTL
-static unsigned int udplite_sysctl_table_users;
-static struct ctl_table_header *udplite_sysctl_header;
+/*
+ * we use it as a template when create per-net syctl table
+ * table data will be assigned later
+ */
static struct ctl_table udplite_sysctl_table[] = {
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_udplite_timeout",
- .data = &nf_ct_udplite_timeout,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@@ -156,7 +175,6 @@ static struct ctl_table udplite_sysctl_t
{
.ctl_name = CTL_UNNUMBERED,
.procname = "nf_conntrack_udplite_timeout_stream",
- .data = &nf_ct_udplite_timeout_stream,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@@ -183,11 +201,6 @@ static struct nf_conntrack_l4proto nf_co
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
-#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udplite_sysctl_table_users,
- .ctl_table_header = &udplite_sysctl_header,
- .ctl_table = udplite_sysctl_table,
-#endif
};
static struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
@@ -206,32 +219,99 @@ static struct nf_conntrack_l4proto nf_co
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
+};
+
+static __net_init int udplite_net_init(struct net *net)
+{
+ struct udplite_net *un;
+ int err;
+
+ un = kmalloc(sizeof(*un), GFP_KERNEL);
+ if (!un)
+ return -ENOMEM;
+
+ /* default values */
+ un->udplite_timeout = 30 * HZ;
+ un->udplite_timeout_stream = 180 * HZ;
+
+ err = net_assign_generic(net, udplite_net_id, un);
+ if (err)
+ goto out;
+
+#ifdef CONFIG_SYSCTL
+ err = -ENOMEM;
+ un->sysctl_table = kmemdup(udplite_sysctl_table,
+ sizeof(udplite_sysctl_table), GFP_KERNEL);
+ if (!un->sysctl_table)
+ goto out;
+
+ un->sysctl_table[0].data = &un->udplite_timeout;
+ un->sysctl_table[1].data = &un->udplite_timeout_stream;
+
+ un->sysctl_header = register_net_sysctl_table(net,
+ nf_net_netfilter_sysctl_path, un->sysctl_table);
+ if (!un->sysctl_header)
+ goto out_free;
+#endif /* CONFIG_SYSCTL */
+
+ return 0;
+
+#ifdef CONFIG_SYSCTL
+out_free:
+ kfree(un->sysctl_table);
+#endif
+
+out:
+ kfree(un);
+ return err;
+}
+
+static __net_exit void udplite_net_exit(struct net *net)
+{
+ struct udplite_net *un = udplite_pernet(net);
#ifdef CONFIG_SYSCTL
- .ctl_table_users = &udplite_sysctl_table_users,
- .ctl_table_header = &udplite_sysctl_header,
- .ctl_table = udplite_sysctl_table,
+ unregister_net_sysctl_table(un->sysctl_header);
+ kfree(un->sysctl_table);
#endif
+ kfree(un);
+
+ net_assign_generic(net, udplite_net_id, NULL);
+}
+
+static struct pernet_operations udplite_net_ops = {
+ .init = udplite_net_init,
+ .exit = udplite_net_exit,
};
static int __init nf_conntrack_proto_udplite_init(void)
{
int err;
- err = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udplite4);
+ err = register_pernet_gen_device(&udplite_net_id, &udplite_net_ops);
if (err < 0)
goto err1;
- err = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udplite6);
+
+ err = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udplite4);
if (err < 0)
goto err2;
+
+ err = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udplite6);
+ if (err < 0)
+ goto err3;
+
return 0;
-err2:
+
+err3:
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
+err2:
+ unregister_pernet_gen_device(udplite_net_id, &udplite_net_ops);
err1:
return err;
}
static void __exit nf_conntrack_proto_udplite_exit(void)
{
+ unregister_pernet_gen_device(udplite_net_id, &udplite_net_ops);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite6);
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udplite4);
}
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