1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 #ifndef _AF_NETLINK_H 1 #ifndef _AF_NETLINK_H
3 #define _AF_NETLINK_H 2 #define _AF_NETLINK_H
4 3
5 #include <linux/rhashtable.h> 4 #include <linux/rhashtable.h>
6 #include <linux/atomic.h> 5 #include <linux/atomic.h>
7 #include <linux/workqueue.h> 6 #include <linux/workqueue.h>
8 #include <net/sock.h> 7 #include <net/sock.h>
9 8
10 /* flags */ <<
11 enum { <<
12 NETLINK_F_KERNEL_SOCKET, <<
13 NETLINK_F_RECV_PKTINFO, <<
14 NETLINK_F_BROADCAST_SEND_ERROR, <<
15 NETLINK_F_RECV_NO_ENOBUFS, <<
16 NETLINK_F_LISTEN_ALL_NSID, <<
17 NETLINK_F_CAP_ACK, <<
18 NETLINK_F_EXT_ACK, <<
19 NETLINK_F_STRICT_CHK, <<
20 }; <<
21 <<
22 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsig 9 #define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
23 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(uns 10 #define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
24 11
>> 12 struct netlink_ring {
>> 13 void **pg_vec;
>> 14 unsigned int head;
>> 15 unsigned int frames_per_block;
>> 16 unsigned int frame_size;
>> 17 unsigned int frame_max;
>> 18
>> 19 unsigned int pg_vec_order;
>> 20 unsigned int pg_vec_pages;
>> 21 unsigned int pg_vec_len;
>> 22
>> 23 atomic_t pending;
>> 24 };
>> 25
25 struct netlink_sock { 26 struct netlink_sock {
26 /* struct sock has to be the first mem 27 /* struct sock has to be the first member of netlink_sock */
27 struct sock sk; 28 struct sock sk;
28 unsigned long flags; <<
29 u32 portid; 29 u32 portid;
30 u32 dst_portid; 30 u32 dst_portid;
31 u32 dst_group; 31 u32 dst_group;
>> 32 u32 flags;
32 u32 subscriptions; 33 u32 subscriptions;
33 u32 ngroups; 34 u32 ngroups;
34 unsigned long *groups; 35 unsigned long *groups;
35 unsigned long state; 36 unsigned long state;
36 size_t max_recvmsg_le 37 size_t max_recvmsg_len;
37 wait_queue_head_t wait; 38 wait_queue_head_t wait;
38 bool bound; 39 bool bound;
39 bool cb_running; 40 bool cb_running;
40 int dump_done_errn 41 int dump_done_errno;
41 struct netlink_callback cb; 42 struct netlink_callback cb;
42 struct mutex nl_cb_mutex; !! 43 struct mutex *cb_mutex;
43 !! 44 struct mutex cb_def_mutex;
44 struct mutex *dump_cb_mutex <<
45 void (*netlink_rcv) 45 void (*netlink_rcv)(struct sk_buff *skb);
46 int (*netlink_bind 46 int (*netlink_bind)(struct net *net, int group);
47 void (*netlink_unbi 47 void (*netlink_unbind)(struct net *net, int group);
48 void (*netlink_rele <<
49 <<
50 struct module *module; 48 struct module *module;
51 49
52 struct rhash_head node; 50 struct rhash_head node;
53 struct rcu_head rcu; 51 struct rcu_head rcu;
54 struct work_struct work; 52 struct work_struct work;
55 }; 53 };
56 54
57 static inline struct netlink_sock *nlk_sk(stru 55 static inline struct netlink_sock *nlk_sk(struct sock *sk)
58 { 56 {
59 return container_of(sk, struct netlink 57 return container_of(sk, struct netlink_sock, sk);
60 } 58 }
61 59
62 #define nlk_test_bit(nr, sk) test_bit(NETLINK_ <<
63 <<
64 struct netlink_table { 60 struct netlink_table {
65 struct rhashtable hash; 61 struct rhashtable hash;
66 struct hlist_head mc_list; 62 struct hlist_head mc_list;
67 struct listeners __rcu *listeners; 63 struct listeners __rcu *listeners;
68 unsigned int flags; 64 unsigned int flags;
69 unsigned int groups; 65 unsigned int groups;
70 struct mutex *cb_mutex; 66 struct mutex *cb_mutex;
71 struct module *module; 67 struct module *module;
72 int (*bind)(struct 68 int (*bind)(struct net *net, int group);
73 void (*unbind)(stru 69 void (*unbind)(struct net *net, int group);
74 void (*release)(str !! 70 bool (*compare)(struct net *net, struct sock *sock);
75 uns <<
76 int registered; 71 int registered;
77 }; 72 };
78 73
79 extern struct netlink_table *nl_table; 74 extern struct netlink_table *nl_table;
80 extern rwlock_t nl_table_lock; 75 extern rwlock_t nl_table_lock;
81 76
82 #endif 77 #endif
83 78
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