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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /net/netlink/af_netlink.h
Initial import
Diffstat (limited to 'net/netlink/af_netlink.h')
-rw-r--r--net/netlink/af_netlink.h79
1 files changed, 79 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h
new file mode 100644
index 000000000..89008405d
--- /dev/null
+++ b/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