#include <linux/list.h>
#include <linux/seq_file.h>
#include <linux/in.h>
+#include <linux/netdevice.h>
#include <linux/skbuff.h>
-
+#include <net/dst.h>
+#include <net/net_namespace.h>
+#include <net/netns/generic.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_core.h>
#define GRE_TIMEOUT (30 * HZ)
#define GRE_STREAM_TIMEOUT (180 * HZ)
-static DEFINE_RWLOCK(nf_ct_gre_lock);
-static LIST_HEAD(gre_keymap_list);
+static int proto_gre_net_id;
+struct netns_proto_gre {
+ rwlock_t keymap_lock;
+ struct list_head keymap_list;
+};
-void nf_ct_gre_keymap_flush(void)
+void nf_ct_gre_keymap_flush(struct net *net)
{
+ struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
struct nf_ct_gre_keymap *km, *tmp;
- write_lock_bh(&nf_ct_gre_lock);
- list_for_each_entry_safe(km, tmp, &gre_keymap_list, list) {
+ write_lock_bh(&net_gre->keymap_lock);
+ list_for_each_entry_safe(km, tmp, &net_gre->keymap_list, list) {
list_del(&km->list);
kfree(km);
}
- write_unlock_bh(&nf_ct_gre_lock);
+ write_unlock_bh(&net_gre->keymap_lock);
}
EXPORT_SYMBOL(nf_ct_gre_keymap_flush);
}
/* look up the source key for a given tuple */
-static __be16 gre_keymap_lookup(struct nf_conntrack_tuple *t)
+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 nf_ct_gre_keymap *km;
__be16 key = 0;
- read_lock_bh(&nf_ct_gre_lock);
- list_for_each_entry(km, &gre_keymap_list, list) {
+ read_lock_bh(&net_gre->keymap_lock);
+ list_for_each_entry(km, &net_gre->keymap_list, list) {
if (gre_key_cmpfn(km, t)) {
key = km->tuple.src.u.gre.key;
break;
}
}
- read_unlock_bh(&nf_ct_gre_lock);
+ read_unlock_bh(&net_gre->keymap_lock);
pr_debug("lookup src key 0x%x for ", key);
nf_ct_dump_tuple(t);
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 nf_conn_help *help = nfct_help(ct);
struct nf_ct_gre_keymap **kmp, *km;
kmp = &help->help.ct_pptp_info.keymap[dir];
if (*kmp) {
/* check whether it's a retransmission */
- read_lock_bh(&nf_ct_gre_lock);
- list_for_each_entry(km, &gre_keymap_list, list) {
+ read_lock_bh(&net_gre->keymap_lock);
+ list_for_each_entry(km, &net_gre->keymap_list, list) {
if (gre_key_cmpfn(km, t) && km == *kmp) {
- read_unlock_bh(&nf_ct_gre_lock);
+ read_unlock_bh(&net_gre->keymap_lock);
return 0;
}
}
- read_unlock_bh(&nf_ct_gre_lock);
+ read_unlock_bh(&net_gre->keymap_lock);
pr_debug("trying to override keymap_%s for ct %p\n",
dir == IP_CT_DIR_REPLY ? "reply" : "orig", ct);
return -EEXIST;
pr_debug("adding new entry %p: ", km);
nf_ct_dump_tuple(&km->tuple);
- write_lock_bh(&nf_ct_gre_lock);
- list_add_tail(&km->list, &gre_keymap_list);
- write_unlock_bh(&nf_ct_gre_lock);
+ write_lock_bh(&net_gre->keymap_lock);
+ list_add_tail(&km->list, &net_gre->keymap_list);
+ write_unlock_bh(&net_gre->keymap_lock);
return 0;
}
/* destroy the keymap entries associated with specified master ct */
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 nf_conn_help *help = nfct_help(ct);
enum ip_conntrack_dir dir;
pr_debug("entering for ct %p\n", ct);
- write_lock_bh(&nf_ct_gre_lock);
+ write_lock_bh(&net_gre->keymap_lock);
for (dir = IP_CT_DIR_ORIGINAL; dir < IP_CT_DIR_MAX; dir++) {
if (help->help.ct_pptp_info.keymap[dir]) {
pr_debug("removing %p from list\n",
help->help.ct_pptp_info.keymap[dir] = NULL;
}
}
- write_unlock_bh(&nf_ct_gre_lock);
+ write_unlock_bh(&net_gre->keymap_lock);
}
EXPORT_SYMBOL_GPL(nf_ct_gre_keymap_destroy);
static bool gre_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
struct nf_conntrack_tuple *tuple)
{
+ struct net *net = dev_net(skb->dev ? skb->dev : skb->dst->dev);
const struct gre_hdr_pptp *pgrehdr;
struct gre_hdr_pptp _pgrehdr;
__be16 srckey;
}
tuple->dst.u.gre.key = pgrehdr->call_id;
- srckey = gre_keymap_lookup(tuple);
+ srckey = gre_keymap_lookup(net, tuple);
tuple->src.u.gre.key = srckey;
return true;
const struct sk_buff *skb,
unsigned int dataoff,
enum ip_conntrack_info ctinfo,
- int pf,
+ u_int8_t pf,
unsigned int hooknum)
{
/* If we've seen traffic both ways, this is a GRE connection.
ct->proto.gre.stream_timeout);
/* Also, more likely to be important, and not a probe. */
set_bit(IPS_ASSURED_BIT, &ct->status);
- nf_conntrack_event_cache(IPCT_STATUS, skb);
+ nf_conntrack_event_cache(IPCT_STATUS, ct);
} else
nf_ct_refresh_acct(ct, ctinfo, skb,
ct->proto.gre.timeout);
#endif
};
+static int proto_gre_net_init(struct net *net)
+{
+ struct netns_proto_gre *net_gre;
+ int rv;
+
+ net_gre = kmalloc(sizeof(struct netns_proto_gre), GFP_KERNEL);
+ if (!net_gre)
+ return -ENOMEM;
+ rwlock_init(&net_gre->keymap_lock);
+ INIT_LIST_HEAD(&net_gre->keymap_list);
+
+ rv = net_assign_generic(net, proto_gre_net_id, net_gre);
+ if (rv < 0)
+ kfree(net_gre);
+ return rv;
+}
+
+static void proto_gre_net_exit(struct net *net)
+{
+ struct netns_proto_gre *net_gre = net_generic(net, proto_gre_net_id);
+
+ nf_ct_gre_keymap_flush(net);
+ kfree(net_gre);
+}
+
+static struct pernet_operations proto_gre_net_ops = {
+ .init = proto_gre_net_init,
+ .exit = proto_gre_net_exit,
+};
+
static int __init nf_ct_proto_gre_init(void)
{
- return nf_conntrack_l4proto_register(&nf_conntrack_l4proto_gre4);
+ int rv;
+
+ rv = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_gre4);
+ if (rv < 0)
+ return rv;
+ rv = register_pernet_gen_subsys(&proto_gre_net_id, &proto_gre_net_ops);
+ if (rv < 0)
+ nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_gre4);
+ return rv;
}
static void nf_ct_proto_gre_fini(void)
{
nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_gre4);
- nf_ct_gre_keymap_flush();
+ unregister_pernet_gen_subsys(proto_gre_net_id, &proto_gre_net_ops);
}
module_init(nf_ct_proto_gre_init);
projects / linux-2.6-omap-h63xx.git / blobdiff