/* 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 */ #define NETLINK_F_KERNEL_SOCKET 0x1 #define NETLINK_F_RECV_PKTINFO 0x2 #define NETLINK_F_BROADCAST_SEND_ERROR 0x4 #define NETLINK_F_RECV_NO_ENOBUFS 0x8 #define NETLINK_F_LISTEN_ALL_NSID 0x10 #define NETLINK_F_CAP_ACK 0x20 #define NETLINK_F_EXT_ACK 0x40 #define NETLINK_F_STRICT_CHK 0x80 #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; 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); } 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