Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / netlink / af_netlink.h

diff --git a/kernel/net/netlink/af_netlink.h b/kernel/net/netlink/af_netlink.h
new file mode 100644 (file)
index 0000000..8900840
--- /dev/null
+++ b/kernel/net/netlink/af_netlink.h
@@ -0,0 +1,79 @@
+#ifndef _AF_NETLINK_H
+#define _AF_NETLINK_H
+
+#include <linux/rhashtable.h>
+#include <linux/atomic.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_ring {
+       void                    **pg_vec;
+       unsigned int            head;
+       unsigned int            frames_per_block;
+       unsigned int            frame_size;
+       unsigned int            frame_max;
+
+       unsigned int            pg_vec_order;
+       unsigned int            pg_vec_pages;
+       unsigned int            pg_vec_len;
+
+       atomic_t                pending;
+};
+
+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;
+       size_t                  max_recvmsg_len;
+       wait_queue_head_t       wait;
+       bool                    cb_running;
+       struct netlink_callback cb;
+       struct mutex            *cb_mutex;
+       struct mutex            cb_def_mutex;
+       void                    (*netlink_rcv)(struct sk_buff *skb);
+       int                     (*netlink_bind)(struct net *net, int group);
+       void                    (*netlink_unbind)(struct net *net, int group);
+       struct module           *module;
+#ifdef CONFIG_NETLINK_MMAP
+       struct mutex            pg_vec_lock;
+       struct netlink_ring     rx_ring;
+       struct netlink_ring     tx_ring;
+       atomic_t                mapped;
+#endif /* CONFIG_NETLINK_MMAP */
+
+       struct rhash_head       node;
+       struct rcu_head         rcu;
+};
+
+static inline struct netlink_sock *nlk_sk(struct sock *sk)
+{
+       return container_of(sk, struct netlink_sock, sk);
+}
+
+struct netlink_table {
+       struct rhashtable       hash;
+       struct hlist_head       mc_list;
+       struct listeners __rcu  *listeners;
+       unsigned int            flags;
+       unsigned int            groups;
+       struct mutex            *cb_mutex;
+       struct module           *module;
+       int                     (*bind)(struct net *net, int group);
+       void                    (*unbind)(struct net *net, int group);
+       bool                    (*compare)(struct net *net, struct sock *sock);
+       int                     registered;
+};
+
+extern struct netlink_table *nl_table;
+extern rwlock_t nl_table_lock;
+
+#endif