hsr_main.h (e5451c8f8330e03ad3cfa16048b4daf961af434f) hsr_main.h (ee1c27977284907d40f7f72c2d078d709f15811f)
1/* Copyright 2011-2014 Autronica Fire and Security AS
2 *
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the Free
5 * Software Foundation; either version 2 of the License, or (at your option)
6 * any later version.
7 *
8 * Author(s):

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25#define HSR_ANNOUNCE_INTERVAL 100 /* ms */
26
27
28/* By how much may slave1 and slave2 timestamps of latest received frame from
29 * each node differ before we notify of communication problem?
30 */
31#define MAX_SLAVE_DIFF 3000 /* ms */
32#define HSR_SEQNR_START (USHRT_MAX - 1024)
1/* Copyright 2011-2014 Autronica Fire and Security AS
2 *
3 * This program is free software; you can redistribute it and/or modify it
4 * under the terms of the GNU General Public License as published by the Free
5 * Software Foundation; either version 2 of the License, or (at your option)
6 * any later version.
7 *
8 * Author(s):

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25#define HSR_ANNOUNCE_INTERVAL 100 /* ms */
26
27
28/* By how much may slave1 and slave2 timestamps of latest received frame from
29 * each node differ before we notify of communication problem?
30 */
31#define MAX_SLAVE_DIFF 3000 /* ms */
32#define HSR_SEQNR_START (USHRT_MAX - 1024)
33#define HSR_SUP_SEQNR_START (HSR_SEQNR_START / 2)
33
34
35/* How often shall we check for broken ring and remove node entries older than
36 * HSR_NODE_FORGET_TIME?
37 */
38#define PRUNE_PERIOD 3000 /* ms */
39
40

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53struct hsr_tag {
54 __be16 path_and_LSDU_size;
55 __be16 sequence_nr;
56 __be16 encap_proto;
57} __packed;
58
59#define HSR_HLEN 6
60
34
35
36/* How often shall we check for broken ring and remove node entries older than
37 * HSR_NODE_FORGET_TIME?
38 */
39#define PRUNE_PERIOD 3000 /* ms */
40
41

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54struct hsr_tag {
55 __be16 path_and_LSDU_size;
56 __be16 sequence_nr;
57 __be16 encap_proto;
58} __packed;
59
60#define HSR_HLEN 6
61
62#define HSR_V1_SUP_LSDUSIZE 52
63
61/* The helper functions below assumes that 'path' occupies the 4 most
62 * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
63 * equivalently, the 4 most significant bits of HSR tag byte 14).
64 *
65 * This is unclear in the IEC specification; its definition of MAC addresses
66 * indicates the spec is written with the least significant bit first (to the
67 * left). This, however, would mean that the LSDU field would be split in two
68 * with the path field in-between, which seems strange. I'm guessing the MAC

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126 set_hsr_tag_path((struct hsr_tag *) hst, path);
127}
128
129static inline void set_hsr_stag_HSR_Ver(struct hsr_sup_tag *hst, u16 HSR_Ver)
130{
131 set_hsr_tag_LSDU_size((struct hsr_tag *) hst, HSR_Ver);
132}
133
64/* The helper functions below assumes that 'path' occupies the 4 most
65 * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or
66 * equivalently, the 4 most significant bits of HSR tag byte 14).
67 *
68 * This is unclear in the IEC specification; its definition of MAC addresses
69 * indicates the spec is written with the least significant bit first (to the
70 * left). This, however, would mean that the LSDU field would be split in two
71 * with the path field in-between, which seems strange. I'm guessing the MAC

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129 set_hsr_tag_path((struct hsr_tag *) hst, path);
130}
131
132static inline void set_hsr_stag_HSR_Ver(struct hsr_sup_tag *hst, u16 HSR_Ver)
133{
134 set_hsr_tag_LSDU_size((struct hsr_tag *) hst, HSR_Ver);
135}
136
134struct hsr_ethhdr_sp {
137struct hsrv0_ethhdr_sp {
135 struct ethhdr ethhdr;
136 struct hsr_sup_tag hsr_sup;
137} __packed;
138
138 struct ethhdr ethhdr;
139 struct hsr_sup_tag hsr_sup;
140} __packed;
141
142struct hsrv1_ethhdr_sp {
143 struct ethhdr ethhdr;
144 struct hsr_tag hsr;
145 struct hsr_sup_tag hsr_sup;
146} __packed;
139
147
148
140enum hsr_port_type {
141 HSR_PT_NONE = 0, /* Must be 0, used by framereg */
142 HSR_PT_SLAVE_A,
143 HSR_PT_SLAVE_B,
144 HSR_PT_INTERLINK,
145 HSR_PT_MASTER,
146 HSR_PT_PORTS, /* This must be the last item in the enum */
147};

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157 struct rcu_head rcu_head;
158 struct list_head ports;
159 struct list_head node_db; /* Known HSR nodes */
160 struct list_head self_node_db; /* MACs of slaves */
161 struct timer_list announce_timer; /* Supervision frame dispatch */
162 struct timer_list prune_timer;
163 int announce_count;
164 u16 sequence_nr;
149enum hsr_port_type {
150 HSR_PT_NONE = 0, /* Must be 0, used by framereg */
151 HSR_PT_SLAVE_A,
152 HSR_PT_SLAVE_B,
153 HSR_PT_INTERLINK,
154 HSR_PT_MASTER,
155 HSR_PT_PORTS, /* This must be the last item in the enum */
156};

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166 struct rcu_head rcu_head;
167 struct list_head ports;
168 struct list_head node_db; /* Known HSR nodes */
169 struct list_head self_node_db; /* MACs of slaves */
170 struct timer_list announce_timer; /* Supervision frame dispatch */
171 struct timer_list prune_timer;
172 int announce_count;
173 u16 sequence_nr;
174 u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */
175 u8 protVersion; /* Indicate if HSRv0 or HSRv1. */
165 spinlock_t seqnr_lock; /* locking for sequence_nr */
166 unsigned char sup_multicast_addr[ETH_ALEN];
167};
168
169#define hsr_for_each_port(hsr, port) \
170 list_for_each_entry_rcu((port), &(hsr)->ports, port_list)
171
172struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt);
173
174/* Caller must ensure skb is a valid HSR frame */
175static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb)
176{
177 struct hsr_ethhdr *hsr_ethhdr;
178
179 hsr_ethhdr = (struct hsr_ethhdr *) skb_mac_header(skb);
180 return ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
181}
182
183#endif /* __HSR_PRIVATE_H */
176 spinlock_t seqnr_lock; /* locking for sequence_nr */
177 unsigned char sup_multicast_addr[ETH_ALEN];
178};
179
180#define hsr_for_each_port(hsr, port) \
181 list_for_each_entry_rcu((port), &(hsr)->ports, port_list)
182
183struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt);
184
185/* Caller must ensure skb is a valid HSR frame */
186static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb)
187{
188 struct hsr_ethhdr *hsr_ethhdr;
189
190 hsr_ethhdr = (struct hsr_ethhdr *) skb_mac_header(skb);
191 return ntohs(hsr_ethhdr->hsr_tag.sequence_nr);
192}
193
194#endif /* __HSR_PRIVATE_H */