xref: /kernel/linux/linux-5.10/include/net/mrp.h (revision 8c2ecf20) 
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _NET_MRP_H
3#define _NET_MRP_H
4
5#define MRP_END_MARK		0x0
6
7struct mrp_pdu_hdr {
8	u8	version;
9};
10
11struct mrp_msg_hdr {
12	u8	attrtype;
13	u8	attrlen;
14};
15
16struct mrp_vecattr_hdr {
17	__be16	lenflags;
18	unsigned char	firstattrvalue[];
19#define MRP_VECATTR_HDR_LEN_MASK cpu_to_be16(0x1FFF)
20#define MRP_VECATTR_HDR_FLAG_LA cpu_to_be16(0x2000)
21};
22
23enum mrp_vecattr_event {
24	MRP_VECATTR_EVENT_NEW,
25	MRP_VECATTR_EVENT_JOIN_IN,
26	MRP_VECATTR_EVENT_IN,
27	MRP_VECATTR_EVENT_JOIN_MT,
28	MRP_VECATTR_EVENT_MT,
29	MRP_VECATTR_EVENT_LV,
30	__MRP_VECATTR_EVENT_MAX
31};
32
33struct mrp_skb_cb {
34	struct mrp_msg_hdr	*mh;
35	struct mrp_vecattr_hdr	*vah;
36	unsigned char		attrvalue[];
37};
38
39static inline struct mrp_skb_cb *mrp_cb(struct sk_buff *skb)
40{
41	BUILD_BUG_ON(sizeof(struct mrp_skb_cb) >
42		     sizeof_field(struct sk_buff, cb));
43	return (struct mrp_skb_cb *)skb->cb;
44}
45
46enum mrp_applicant_state {
47	MRP_APPLICANT_INVALID,
48	MRP_APPLICANT_VO,
49	MRP_APPLICANT_VP,
50	MRP_APPLICANT_VN,
51	MRP_APPLICANT_AN,
52	MRP_APPLICANT_AA,
53	MRP_APPLICANT_QA,
54	MRP_APPLICANT_LA,
55	MRP_APPLICANT_AO,
56	MRP_APPLICANT_QO,
57	MRP_APPLICANT_AP,
58	MRP_APPLICANT_QP,
59	__MRP_APPLICANT_MAX
60};
61#define MRP_APPLICANT_MAX	(__MRP_APPLICANT_MAX - 1)
62
63enum mrp_event {
64	MRP_EVENT_NEW,
65	MRP_EVENT_JOIN,
66	MRP_EVENT_LV,
67	MRP_EVENT_TX,
68	MRP_EVENT_R_NEW,
69	MRP_EVENT_R_JOIN_IN,
70	MRP_EVENT_R_IN,
71	MRP_EVENT_R_JOIN_MT,
72	MRP_EVENT_R_MT,
73	MRP_EVENT_R_LV,
74	MRP_EVENT_R_LA,
75	MRP_EVENT_REDECLARE,
76	MRP_EVENT_PERIODIC,
77	__MRP_EVENT_MAX
78};
79#define MRP_EVENT_MAX		(__MRP_EVENT_MAX - 1)
80
81enum mrp_tx_action {
82	MRP_TX_ACTION_NONE,
83	MRP_TX_ACTION_S_NEW,
84	MRP_TX_ACTION_S_JOIN_IN,
85	MRP_TX_ACTION_S_JOIN_IN_OPTIONAL,
86	MRP_TX_ACTION_S_IN_OPTIONAL,
87	MRP_TX_ACTION_S_LV,
88};
89
90struct mrp_attr {
91	struct rb_node			node;
92	enum mrp_applicant_state	state;
93	u8				type;
94	u8				len;
95	unsigned char			value[];
96};
97
98enum mrp_applications {
99	MRP_APPLICATION_MVRP,
100	__MRP_APPLICATION_MAX
101};
102#define MRP_APPLICATION_MAX	(__MRP_APPLICATION_MAX - 1)
103
104struct mrp_application {
105	enum mrp_applications	type;
106	unsigned int		maxattr;
107	struct packet_type	pkttype;
108	unsigned char		group_address[ETH_ALEN];
109	u8			version;
110};
111
112struct mrp_applicant {
113	struct mrp_application	*app;
114	struct net_device	*dev;
115	struct timer_list	join_timer;
116	struct timer_list	periodic_timer;
117
118	spinlock_t		lock;
119	struct sk_buff_head	queue;
120	struct sk_buff		*pdu;
121	struct rb_root		mad;
122	struct rcu_head		rcu;
123	bool			active;
124};
125
126struct mrp_port {
127	struct mrp_applicant __rcu	*applicants[MRP_APPLICATION_MAX + 1];
128	struct rcu_head			rcu;
129};
130
131int mrp_register_application(struct mrp_application *app);
132void mrp_unregister_application(struct mrp_application *app);
133
134int mrp_init_applicant(struct net_device *dev, struct mrp_application *app);
135void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *app);
136
137int mrp_request_join(const struct net_device *dev,
138		     const struct mrp_application *app,
139		     const void *value, u8 len, u8 type);
140void mrp_request_leave(const struct net_device *dev,
141		       const struct mrp_application *app,
142		       const void *value, u8 len, u8 type);
143
144#endif /* _NET_MRP_H */
145