net: prepare netlink code for netlink diag

Move a few declarations in a header.

Acked-by: Pavel Emelyanov <xemul@parallels.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Gao feng <gaofeng@cn.fujitsu.com>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 62 insertions, 0 deletions

diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h
new file mode 100644
index 000000000000..d9acb2a1d855
--- /dev/null
+++ b/net/netlink/af_netlink.h
@@ -0,0 +1,62 @@
+#ifndef _AF_NETLINK_H
+#define _AF_NETLINK_H
+
+#include <net/sock.h>
+
+#define NLGRPSZ(x)      (ALIGN(x, sizeof(unsigned long) * 8) / 8)
+#define NLGRPLONGS(x)   (NLGRPSZ(x)/sizeof(unsigned long))
+
+struct netlink_sock {
+        /* struct sock has to be the first member of netlink_sock */
+        struct sock             sk;
+        u32                     portid;
+        u32                     dst_portid;
+        u32                     dst_group;
+        u32                     flags;
+        u32                     subscriptions;
+        u32                     ngroups;
+        unsigned long           *groups;
+        unsigned long           state;
+        wait_queue_head_t       wait;
+        struct netlink_callback *cb;
+        struct mutex            *cb_mutex;
+        struct mutex            cb_def_mutex;
+        void                    (*netlink_rcv)(struct sk_buff *skb);
+        void                    (*netlink_bind)(int group);
+        struct module           *module;
+};
+
+static inline struct netlink_sock *nlk_sk(struct sock *sk)
+{
+        return container_of(sk, struct netlink_sock, sk);
+}
+
+struct nl_portid_hash {
+        struct hlist_head       *table;
+        unsigned long           rehash_time;
+
+        unsigned int            mask;
+        unsigned int            shift;
+
+        unsigned int            entries;
+        unsigned int            max_shift;
+
+        u32                     rnd;
+};
+
+struct netlink_table {
+        struct nl_portid_hash   hash;
+        struct hlist_head       mc_list;
+        struct listeners __rcu  *listeners;
+        unsigned int            flags;
+        unsigned int            groups;
+        struct mutex            *cb_mutex;
+        struct module           *module;
+        void                    (*bind)(int group);
+        int                     registered;
+};
+
+extern struct netlink_table *nl_table;
+extern rwlock_t nl_table_lock;
+
+#endif