#include <linux/workqueue.h>
#include <linux/list.h>
+#include <net/netns/core.h>
+#include <net/netns/mib.h>
+#include <net/netns/unix.h>
+#include <net/netns/packet.h>
+#include <net/netns/ipv4.h>
+#include <net/netns/ipv6.h>
+#include <net/netns/dccp.h>
+#include <net/netns/x_tables.h>
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#include <net/netns/conntrack.h>
+#endif
+#include <net/netns/xfrm.h>
+
struct proc_dir_entry;
struct net_device;
+struct sock;
+struct ctl_table_header;
+struct net_generic;
+
struct net {
atomic_t count; /* To decided when the network
* namespace should be freed.
*/
+#ifdef NETNS_REFCNT_DEBUG
atomic_t use_count; /* To track references we
* destroy on demand
*/
+#endif
struct list_head list; /* list of network namespaces */
struct work_struct work; /* work struct for freeing */
struct proc_dir_entry *proc_net;
struct proc_dir_entry *proc_net_stat;
- struct proc_dir_entry *proc_net_root;
+
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_set sysctls;
+#endif
struct net_device *loopback_dev; /* The loopback */
struct list_head dev_base_head;
struct hlist_head *dev_name_head;
struct hlist_head *dev_index_head;
+
+ /* core fib_rules */
+ struct list_head rules_ops;
+ spinlock_t rules_mod_lock;
+
+ struct sock *rtnl; /* rtnetlink socket */
+
+ struct netns_core core;
+ struct netns_mib mib;
+ struct netns_packet packet;
+ struct netns_unix unx;
+ struct netns_ipv4 ipv4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct netns_ipv6 ipv6;
+#endif
+#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
+ struct netns_dccp dccp;
+#endif
+#ifdef CONFIG_NETFILTER
+ struct netns_xt xt;
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+ struct netns_ct ct;
+#endif
+#endif
+#ifdef CONFIG_XFRM
+ struct netns_xfrm xfrm;
+#endif
+ struct net_generic *gen;
};
-#ifdef CONFIG_NET
+
+#include <linux/seq_file_net.h>
+
/* Init's network namespace */
extern struct net init_net;
-#define INIT_NET_NS(net_ns) .net_ns = &init_net,
-#else
-#define INIT_NET_NS(net_ns)
-#endif
-
-extern struct list_head net_namespace_list;
#ifdef CONFIG_NET
+#define INIT_NET_NS(net_ns) .net_ns = &init_net,
+
extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
-#else
+
+#else /* CONFIG_NET */
+
+#define INIT_NET_NS(net_ns)
+
static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
{
/* There is nothing to copy so this is a noop */
return net_ns;
}
-#endif
+#endif /* CONFIG_NET */
+
+
+extern struct list_head net_namespace_list;
+#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
static inline struct net *get_net(struct net *net)
{
-#ifdef CONFIG_NET
atomic_inc(&net->count);
-#endif
return net;
}
static inline void put_net(struct net *net)
{
-#ifdef CONFIG_NET
if (atomic_dec_and_test(&net->count))
__put_net(net);
+}
+
+static inline
+int net_eq(const struct net *net1, const struct net *net2)
+{
+ return net1 == net2;
+}
+#else
+
+static inline struct net *get_net(struct net *net)
+{
+ return net;
+}
+
+static inline void put_net(struct net *net)
+{
+}
+
+static inline struct net *maybe_get_net(struct net *net)
+{
+ return net;
+}
+
+static inline
+int net_eq(const struct net *net1, const struct net *net2)
+{
+ return 1;
+}
#endif
+
+
+#ifdef NETNS_REFCNT_DEBUG
+static inline struct net *hold_net(struct net *net)
+{
+ if (net)
+ atomic_inc(&net->use_count);
+ return net;
}
+static inline void release_net(struct net *net)
+{
+ if (net)
+ atomic_dec(&net->use_count);
+}
+#else
static inline struct net *hold_net(struct net *net)
{
-#ifdef CONFIG_NET
- atomic_inc(&net->use_count);
-#endif
return net;
}
static inline void release_net(struct net *net)
{
-#ifdef CONFIG_NET
- atomic_dec(&net->use_count);
+}
#endif
+
+#ifdef CONFIG_NET_NS
+
+static inline void write_pnet(struct net **pnet, struct net *net)
+{
+ *pnet = net;
+}
+
+static inline struct net *read_pnet(struct net * const *pnet)
+{
+ return *pnet;
}
+#else
+
+#define write_pnet(pnet, net) do { (void)(net);} while (0)
+#define read_pnet(pnet) (&init_net)
+
+#endif
+
#define for_each_net(VAR) \
list_for_each_entry(VAR, &net_namespace_list, list)
#ifdef CONFIG_NET_NS
#define __net_init
#define __net_exit
+#define __net_initdata
#else
#define __net_init __init
#define __net_exit __exit_refok
+#define __net_initdata __initdata
#endif
struct pernet_operations {
void (*exit)(struct net *net);
};
+/*
+ * Use these carefully. If you implement a network device and it
+ * needs per network namespace operations use device pernet operations,
+ * otherwise use pernet subsys operations.
+ *
+ * This is critically important. Most of the network code cleanup
+ * runs with the assumption that dev_remove_pack has been called so no
+ * new packets will arrive during and after the cleanup functions have
+ * been called. dev_remove_pack is not per namespace so instead the
+ * guarantee of no more packets arriving in a network namespace is
+ * provided by ensuring that all network devices and all sockets have
+ * left the network namespace before the cleanup methods are called.
+ *
+ * For the longest time the ipv4 icmp code was registered as a pernet
+ * device which caused kernel oops, and panics during network
+ * namespace cleanup. So please don't get this wrong.
+ */
extern int register_pernet_subsys(struct pernet_operations *);
extern void unregister_pernet_subsys(struct pernet_operations *);
+extern int register_pernet_gen_subsys(int *id, struct pernet_operations *);
+extern void unregister_pernet_gen_subsys(int id, struct pernet_operations *);
extern int register_pernet_device(struct pernet_operations *);
extern void unregister_pernet_device(struct pernet_operations *);
+extern int register_pernet_gen_device(int *id, struct pernet_operations *);
+extern void unregister_pernet_gen_device(int id, struct pernet_operations *);
+
+struct ctl_path;
+struct ctl_table;
+struct ctl_table_header;
+
+extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
+ const struct ctl_path *path, struct ctl_table *table);
+extern struct ctl_table_header *register_net_sysctl_rotable(
+ const struct ctl_path *path, struct ctl_table *table);
+extern void unregister_net_sysctl_table(struct ctl_table_header *header);
#endif /* __NET_NET_NAMESPACE_H */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff