#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 sock;
+
+
+#define NETDEV_HASHBITS 8
+#define NETDEV_HASHENTRIES (1 << NETDEV_HASHBITS)
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 list_head cleanup_list; /* namespaces on death row */
+ struct list_head exit_list; /* Use only net_mutex */
struct proc_dir_entry *proc_net;
struct proc_dir_entry *proc_net_stat;
- struct list_head sysctl_table_headers;
+#ifdef CONFIG_SYSCTL
+ struct ctl_table_set sysctls;
+#endif
struct net_device *loopback_dev; /* The loopback */
spinlock_t rules_mod_lock;
struct sock *rtnl; /* rtnetlink socket */
+ struct sock *genl_sock;
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
+ struct sock *nfnl;
+ struct sock *nfnl_stash;
#endif
+#ifdef CONFIG_XFRM
+ struct netns_xfrm xfrm;
+#endif
+#ifdef CONFIG_WEXT_CORE
+ struct sk_buff_head wext_nlevents;
+#endif
+ struct net_generic *gen;
};
extern struct net init_net;
#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 /* 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 */
extern struct list_head net_namespace_list;
+extern struct net *get_net_ns_by_pid(pid_t pid);
+
#ifdef CONFIG_NET_NS
extern void __put_net(struct net *net);
__put_net(net);
}
-static inline struct net *hold_net(struct 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)
{
- atomic_inc(&net->use_count);
return net;
}
-static inline void release_net(struct net *net)
+static inline void put_net(struct net *net)
{
- atomic_dec(&net->use_count);
+}
+
+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 net1 == net2;
+ return 1;
}
-#else
-static inline struct net *get_net(struct net *net)
+#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 put_net(struct net *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)
{
return net;
static inline void release_net(struct net *net)
{
}
+#endif
-static inline struct net *maybe_get_net(struct net *net)
+#ifdef CONFIG_NET_NS
+
+static inline void write_pnet(struct net **pnet, struct net *net)
{
- return net;
+ *pnet = net;
}
-static inline
-int net_eq(const struct net *net1, const struct net *net2)
+static inline struct net *read_pnet(struct net * const *pnet)
{
- return 1;
+ 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)
+#define for_each_net_rcu(VAR) \
+ list_for_each_entry_rcu(VAR, &net_namespace_list, list)
+
#ifdef CONFIG_NET_NS
#define __net_init
#define __net_exit
struct list_head list;
int (*init)(struct net *net);
void (*exit)(struct net *net);
+ void (*exit_batch)(struct list_head *net_exit_list);
+ int *id;
+ size_t size;
};
+/*
+ * 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.
+ *
+ * Network interfaces need to be removed from a dying netns _before_
+ * subsys notifiers can be called, as most of the network code cleanup
+ * (which is done from subsys notifiers) 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_device(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