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
11struct mrp_pdu_hdr {
12	u8	version;
13};
14
15struct mrp_msg_hdr {
16	u8	attrtype;
17	u8	attrlen;
18};
19
20struct 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
27enum 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
37struct mrp_skb_cb {
38	struct mrp_msg_hdr	*mh;
39	struct mrp_vecattr_hdr	*vah;
40	unsigned char		attrvalue[];
41};
42
43static 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
50enum 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
67enum 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
85enum 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
94struct 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
102enum mrp_applications {
103	MRP_APPLICATION_MVRP,
104	__MRP_APPLICATION_MAX
105};
106#define MRP_APPLICATION_MAX	(__MRP_APPLICATION_MAX - 1)
107
108struct 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
116struct 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
130struct mrp_port {
131	struct mrp_applicant __rcu	*applicants[MRP_APPLICATION_MAX + 1];
132	struct rcu_head			rcu;
133};
134
135int mrp_register_application(struct mrp_application *app);
136void mrp_unregister_application(struct mrp_application *app);
137
138int mrp_init_applicant(struct net_device *dev, struct mrp_application *app);
139void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *app);
140
141int mrp_request_join(const struct net_device *dev,
142		     const struct mrp_application *app,
143		     const void *value, u8 len, u8 type);
144void 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