1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright 2011-2014 Autronica Fire and Security AS
3  *
4  * Author(s):
5  *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
6  *
7  * include file for HSR and PRP.
8  */
9 
10 #ifndef __HSR_FRAMEREG_H
11 #define __HSR_FRAMEREG_H
12 
13 #include "hsr_main.h"
14 
15 struct hsr_node;
16 
17 struct hsr_frame_info {
18 	struct sk_buff *skb_std;
19 	struct sk_buff *skb_hsr;
20 	struct sk_buff *skb_prp;
21 	struct hsr_port *port_rcv;
22 	struct hsr_node *node_src;
23 	u16 sequence_nr;
24 	bool is_supervision;
25 	bool is_vlan;
26 	bool is_local_dest;
27 	bool is_local_exclusive;
28 	bool is_from_san;
29 };
30 
31 #ifdef CONFIG_LOCKDEP
32 int lockdep_hsr_is_held(spinlock_t *lock);
33 #else
34 #define lockdep_hsr_is_held(lock)	1
35 #endif
36 
37 u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr);
38 struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock);
39 void hsr_del_self_node(struct hsr_priv *hsr);
40 void hsr_del_nodes(struct hlist_head *node_db);
41 struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db,
42 			      struct sk_buff *skb, bool is_sup,
43 			      enum hsr_port_type rx_port);
44 void hsr_handle_sup_frame(struct hsr_frame_info *frame);
45 bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr);
46 
47 void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb);
48 void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb,
49 			 struct hsr_port *port);
50 
51 void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
52 			   u16 sequence_nr);
53 int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
54 			   u16 sequence_nr);
55 
56 void hsr_prune_nodes(struct timer_list *t);
57 
58 int hsr_create_self_node(struct hsr_priv *hsr,
59 			 const unsigned char addr_a[ETH_ALEN],
60 			 const unsigned char addr_b[ETH_ALEN]);
61 
62 void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
63 			unsigned char addr[ETH_ALEN]);
64 
65 int hsr_get_node_data(struct hsr_priv *hsr,
66 		      const unsigned char *addr,
67 		      unsigned char addr_b[ETH_ALEN],
68 		      unsigned int *addr_b_ifindex,
69 		      int *if1_age,
70 		      u16 *if1_seq,
71 		      int *if2_age,
72 		      u16 *if2_seq);
73 
74 void prp_handle_san_frame(bool san, enum hsr_port_type port,
75 			  struct hsr_node *node);
76 void prp_update_san_info(struct hsr_node *node, bool is_sup);
77 
78 struct hsr_node {
79 	struct hlist_node	mac_list;
80 	unsigned char		macaddress_A[ETH_ALEN];
81 	unsigned char		macaddress_B[ETH_ALEN];
82 	/* Local slave through which AddrB frames are received from this node */
83 	enum hsr_port_type	addr_B_port;
84 	unsigned long		time_in[HSR_PT_PORTS];
85 	bool			time_in_stale[HSR_PT_PORTS];
86 	unsigned long		time_out[HSR_PT_PORTS];
87 	/* if the node is a SAN */
88 	bool			san_a;
89 	bool			san_b;
90 	u16			seq_out[HSR_PT_PORTS];
91 	struct rcu_head		rcu_head;
92 };
93 
94 #endif /* __HSR_FRAMEREG_H */
95