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gerrit-public.fairphone.software / kernel / msm-4.9 / 0f20e456bd0542b7bf8cae8f553142405a8ab430 / . / net / netlink / af_netlink.h
blob: 14437d9b1965dcf3d3f085e4aba1f804bdc6f652 [file] [log] [blame]
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]1#ifndef _AF_NETLINK_H
2#define _AF_NETLINK_H
3
Thomas Grafe3416942014-08-02 11:47:45 +0200[diff] [blame]4#include <linux/rhashtable.h>
Johannes Bergee1c24422015-01-16 11:37:14 +0100[diff] [blame]5#include <linux/atomic.h>
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]6#include <net/sock.h>
7
8#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
9#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
10
Patrick McHardyccdfcc32013-04-17 06:47:01 +0000[diff] [blame]11struct netlink_ring {
12 void **pg_vec;
13 unsigned int head;
14 unsigned int frames_per_block;
15 unsigned int frame_size;
16 unsigned int frame_max;
17
18 unsigned int pg_vec_order;
19 unsigned int pg_vec_pages;
20 unsigned int pg_vec_len;
21
22 atomic_t pending;
23};
24
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]25struct netlink_sock {
26 /* struct sock has to be the first member of netlink_sock */
27 struct sock sk;
28 u32 portid;
29 u32 dst_portid;
30 u32 dst_group;
31 u32 flags;
32 u32 subscriptions;
33 u32 ngroups;
34 unsigned long *groups;
35 unsigned long state;
Eric Dumazet9063e212014-03-07 12:02:33 -0800[diff] [blame]36 size_t max_recvmsg_len;
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]37 wait_queue_head_t wait;
Herbert Xuda314c92015-09-22 11:38:56 +0800[diff] [blame]38 bool bound;
Pravin B Shelar16b304f2013-08-15 15:31:06 -0700[diff] [blame]39 bool cb_running;
40 struct netlink_callback cb;
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]41 struct mutex *cb_mutex;
42 struct mutex cb_def_mutex;
43 void (*netlink_rcv)(struct sk_buff *skb);
Johannes Berg023e2cf2014-12-23 21:00:06 +0100[diff] [blame]44 int (*netlink_bind)(struct net *net, int group);
45 void (*netlink_unbind)(struct net *net, int group);
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]46 struct module *module;
Patrick McHardyccdfcc32013-04-17 06:47:01 +0000[diff] [blame]47#ifdef CONFIG_NETLINK_MMAP
48 struct mutex pg_vec_lock;
49 struct netlink_ring rx_ring;
50 struct netlink_ring tx_ring;
51 atomic_t mapped;
52#endif /* CONFIG_NETLINK_MMAP */
Thomas Grafe3416942014-08-02 11:47:45 +0200[diff] [blame]53
54 struct rhash_head node;
Thomas Graf21e49022015-01-02 23:00:22 +0100[diff] [blame]55 struct rcu_head rcu;
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]56};
57
58static inline struct netlink_sock *nlk_sk(struct sock *sk)
59{
60 return container_of(sk, struct netlink_sock, sk);
61}
62
Daniel Borkmann1853c942015-09-10 20:05:46 +0200[diff] [blame]63static inline bool netlink_skb_is_mmaped(const struct sk_buff *skb)
64{
65#ifdef CONFIG_NETLINK_MMAP
66 return NETLINK_CB(skb).flags & NETLINK_SKB_MMAPED;
67#else
68 return false;
69#endif /* CONFIG_NETLINK_MMAP */
70}
71
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]72struct netlink_table {
Thomas Grafe3416942014-08-02 11:47:45 +0200[diff] [blame]73 struct rhashtable hash;
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]74 struct hlist_head mc_list;
75 struct listeners __rcu *listeners;
76 unsigned int flags;
77 unsigned int groups;
78 struct mutex *cb_mutex;
79 struct module *module;
Johannes Berg023e2cf2014-12-23 21:00:06 +0100[diff] [blame]80 int (*bind)(struct net *net, int group);
81 void (*unbind)(struct net *net, int group);
Gao fengda12c902013-06-06 14:49:11 +0800[diff] [blame]82 bool (*compare)(struct net *net, struct sock *sock);
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]83 int registered;
84};
85
86extern struct netlink_table *nl_table;
87extern rwlock_t nl_table_lock;
Andrey Vagin0f29c762013-03-21 20:33:47 +0400[diff] [blame]88
89#endif