1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_MRP_H
3 #define _NET_MRP_H
4
5 #include <linux/netdevice.h>
6 #include <linux/skbuff.h>
7 #include <linux/types.h>
8
9 #define MRP_END_MARK 0x0
10
11 struct mrp_pdu_hdr {
12 u8 version;
13 };
14
15 struct mrp_msg_hdr {
16 u8 attrtype;
17 u8 attrlen;
18 };
19
20 struct mrp_vecattr_hdr {
21 __be16 lenflags;
22 unsigned char firstattrvalue[];
23 #define MRP_VECATTR_HDR_LEN_MASK cpu_to_be16(0x1FFF)
24 #define MRP_VECATTR_HDR_FLAG_LA cpu_to_be16(0x2000)
25 };
26
27 enum mrp_vecattr_event {
28 MRP_VECATTR_EVENT_NEW,
29 MRP_VECATTR_EVENT_JOIN_IN,
30 MRP_VECATTR_EVENT_IN,
31 MRP_VECATTR_EVENT_JOIN_MT,
32 MRP_VECATTR_EVENT_MT,
33 MRP_VECATTR_EVENT_LV,
34 __MRP_VECATTR_EVENT_MAX
35 };
36
37 struct mrp_skb_cb {
38 struct mrp_msg_hdr *mh;
39 struct mrp_vecattr_hdr *vah;
40 unsigned char attrvalue[];
41 };
42
mrp_cb(struct sk_buff * skb)43 static inline struct mrp_skb_cb *mrp_cb(struct sk_buff *skb)
44 {
45 BUILD_BUG_ON(sizeof(struct mrp_skb_cb) >
46 sizeof_field(struct sk_buff, cb));
47 return (struct mrp_skb_cb *)skb->cb;
48 }
49
50 enum mrp_applicant_state {
51 MRP_APPLICANT_INVALID,
52 MRP_APPLICANT_VO,
53 MRP_APPLICANT_VP,
54 MRP_APPLICANT_VN,
55 MRP_APPLICANT_AN,
56 MRP_APPLICANT_AA,
57 MRP_APPLICANT_QA,
58 MRP_APPLICANT_LA,
59 MRP_APPLICANT_AO,
60 MRP_APPLICANT_QO,
61 MRP_APPLICANT_AP,
62 MRP_APPLICANT_QP,
63 __MRP_APPLICANT_MAX
64 };
65 #define MRP_APPLICANT_MAX (__MRP_APPLICANT_MAX - 1)
66
67 enum mrp_event {
68 MRP_EVENT_NEW,
69 MRP_EVENT_JOIN,
70 MRP_EVENT_LV,
71 MRP_EVENT_TX,
72 MRP_EVENT_R_NEW,
73 MRP_EVENT_R_JOIN_IN,
74 MRP_EVENT_R_IN,
75 MRP_EVENT_R_JOIN_MT,
76 MRP_EVENT_R_MT,
77 MRP_EVENT_R_LV,
78 MRP_EVENT_R_LA,
79 MRP_EVENT_REDECLARE,
80 MRP_EVENT_PERIODIC,
81 __MRP_EVENT_MAX
82 };
83 #define MRP_EVENT_MAX (__MRP_EVENT_MAX - 1)
84
85 enum mrp_tx_action {
86 MRP_TX_ACTION_NONE,
87 MRP_TX_ACTION_S_NEW,
88 MRP_TX_ACTION_S_JOIN_IN,
89 MRP_TX_ACTION_S_JOIN_IN_OPTIONAL,
90 MRP_TX_ACTION_S_IN_OPTIONAL,
91 MRP_TX_ACTION_S_LV,
92 };
93
94 struct mrp_attr {
95 struct rb_node node;
96 enum mrp_applicant_state state;
97 u8 type;
98 u8 len;
99 unsigned char value[];
100 };
101
102 enum mrp_applications {
103 MRP_APPLICATION_MVRP,
104 __MRP_APPLICATION_MAX
105 };
106 #define MRP_APPLICATION_MAX (__MRP_APPLICATION_MAX - 1)
107
108 struct mrp_application {
109 enum mrp_applications type;
110 unsigned int maxattr;
111 struct packet_type pkttype;
112 unsigned char group_address[ETH_ALEN];
113 u8 version;
114 };
115
116 struct mrp_applicant {
117 struct mrp_application *app;
118 struct net_device *dev;
119 struct timer_list join_timer;
120 struct timer_list periodic_timer;
121
122 spinlock_t lock;
123 struct sk_buff_head queue;
124 struct sk_buff *pdu;
125 struct rb_root mad;
126 struct rcu_head rcu;
127 bool active;
128 };
129
130 struct mrp_port {
131 struct mrp_applicant __rcu *applicants[MRP_APPLICATION_MAX + 1];
132 struct rcu_head rcu;
133 };
134
135 int mrp_register_application(struct mrp_application *app);
136 void mrp_unregister_application(struct mrp_application *app);
137
138 int mrp_init_applicant(struct net_device *dev, struct mrp_application *app);
139 void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *app);
140
141 int mrp_request_join(const struct net_device *dev,
142 const struct mrp_application *app,
143 const void *value, u8 len, u8 type);
144 void mrp_request_leave(const struct net_device *dev,
145 const struct mrp_application *app,
146 const void *value, u8 len, u8 type);
147
148 #endif /* _NET_MRP_H */
149