summaryrefslogtreecommitdiffstats
path: root/net/netlink/af_netlink.h
diff options
context:
space:
mode:
Diffstat (limited to 'net/netlink/af_netlink.h')
-rw-r--r--net/netlink/af_netlink.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h
new file mode 100644
index 000000000..b30b8fc76
--- /dev/null
+++ b/net/netlink/af_netlink.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _AF_NETLINK_H
+#define _AF_NETLINK_H
+
+#include <linux/rhashtable.h>
+#include <linux/atomic.h>
+#include <linux/workqueue.h>
+#include <net/sock.h>
+
+/* flags */
+enum {
+ NETLINK_F_KERNEL_SOCKET,
+ NETLINK_F_RECV_PKTINFO,
+ NETLINK_F_BROADCAST_SEND_ERROR,
+ NETLINK_F_RECV_NO_ENOBUFS,
+ NETLINK_F_LISTEN_ALL_NSID,
+ NETLINK_F_CAP_ACK,
+ NETLINK_F_EXT_ACK,
+ NETLINK_F_STRICT_CHK,
+};
+
+#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;
+ unsigned long flags;
+ u32 portid;
+ u32 dst_portid;
+ u32 dst_group;
+ u32 subscriptions;
+ u32 ngroups;
+ unsigned long *groups;
+ unsigned long state;
+ size_t max_recvmsg_len;
+ wait_queue_head_t wait;
+ bool bound;
+ bool cb_running;
+ int dump_done_errno;
+ 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;
+
+ struct rhash_head node;
+ struct rcu_head rcu;
+ struct work_struct work;
+};
+
+static inline struct netlink_sock *nlk_sk(struct sock *sk)
+{
+ return container_of(sk, struct netlink_sock, sk);
+}
+
+#define nlk_test_bit(nr, sk) test_bit(NETLINK_F_##nr, &nlk_sk(sk)->flags)
+
+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