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0e7623bd | 1 | // SPDX-License-Identifier: GPL-2.0 |
70ebe4a4 | 2 | /* Copyright 2011-2014 Autronica Fire and Security AS |
f421436a AB |
3 | * |
4 | * Author(s): | |
70ebe4a4 | 5 | * 2011-2014 Arvid Brodin, arvid.brodin@alten.se |
f421436a AB |
6 | * |
7 | * The HSR spec says never to forward the same frame twice on the same | |
8 | * interface. A frame is identified by its source MAC address and its HSR | |
9 | * sequence number. This code keeps track of senders and their sequence numbers | |
10 | * to allow filtering of duplicate frames, and to detect HSR ring errors. | |
11 | */ | |
12 | ||
13 | #include <linux/if_ether.h> | |
14 | #include <linux/etherdevice.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/rculist.h> | |
17 | #include "hsr_main.h" | |
18 | #include "hsr_framereg.h" | |
19 | #include "hsr_netlink.h" | |
20 | ||
f266a683 | 21 | /* TODO: use hash lists for mac addresses (linux/jhash.h)? */ |
f421436a | 22 | |
f266a683 AB |
23 | /* seq_nr_after(a, b) - return true if a is after (higher in sequence than) b, |
24 | * false otherwise. | |
f421436a | 25 | */ |
f266a683 | 26 | static bool seq_nr_after(u16 a, u16 b) |
f421436a | 27 | { |
f266a683 AB |
28 | /* Remove inconsistency where |
29 | * seq_nr_after(a, b) == seq_nr_before(a, b) | |
30 | */ | |
5fa96778 | 31 | if ((int)b - a == 32768) |
f266a683 | 32 | return false; |
f421436a | 33 | |
5fa96778 | 34 | return (((s16)(b - a)) < 0); |
f421436a | 35 | } |
9f73c2bb | 36 | |
f266a683 AB |
37 | #define seq_nr_before(a, b) seq_nr_after((b), (a)) |
38 | #define seq_nr_after_or_eq(a, b) (!seq_nr_before((a), (b))) | |
39 | #define seq_nr_before_or_eq(a, b) (!seq_nr_after((a), (b))) | |
f421436a | 40 | |
f266a683 | 41 | bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr) |
f421436a | 42 | { |
70ebe4a4 | 43 | struct hsr_node *node; |
f421436a | 44 | |
f266a683 AB |
45 | node = list_first_or_null_rcu(&hsr->self_node_db, struct hsr_node, |
46 | mac_list); | |
47 | if (!node) { | |
48 | WARN_ONCE(1, "HSR: No self node\n"); | |
49 | return false; | |
f421436a AB |
50 | } |
51 | ||
b1b4aa91 | 52 | if (ether_addr_equal(addr, node->macaddress_A)) |
f266a683 | 53 | return true; |
b1b4aa91 | 54 | if (ether_addr_equal(addr, node->macaddress_B)) |
f266a683 | 55 | return true; |
f421436a | 56 | |
f266a683 AB |
57 | return false; |
58 | } | |
f421436a AB |
59 | |
60 | /* Search for mac entry. Caller must hold rcu read lock. | |
61 | */ | |
b1b4aa91 MK |
62 | static struct hsr_node *find_node_by_addr_A(struct list_head *node_db, |
63 | const unsigned char addr[ETH_ALEN]) | |
f421436a | 64 | { |
70ebe4a4 | 65 | struct hsr_node *node; |
f421436a AB |
66 | |
67 | list_for_each_entry_rcu(node, node_db, mac_list) { | |
b1b4aa91 | 68 | if (ether_addr_equal(node->macaddress_A, addr)) |
f421436a AB |
69 | return node; |
70 | } | |
71 | ||
72 | return NULL; | |
73 | } | |
74 | ||
f421436a AB |
75 | /* Helper for device init; the self_node_db is used in hsr_rcv() to recognize |
76 | * frames from self that's been looped over the HSR ring. | |
77 | */ | |
78 | int hsr_create_self_node(struct list_head *self_node_db, | |
79 | unsigned char addr_a[ETH_ALEN], | |
80 | unsigned char addr_b[ETH_ALEN]) | |
81 | { | |
70ebe4a4 | 82 | struct hsr_node *node, *oldnode; |
f421436a AB |
83 | |
84 | node = kmalloc(sizeof(*node), GFP_KERNEL); | |
85 | if (!node) | |
86 | return -ENOMEM; | |
87 | ||
b1b4aa91 MK |
88 | ether_addr_copy(node->macaddress_A, addr_a); |
89 | ether_addr_copy(node->macaddress_B, addr_b); | |
f421436a AB |
90 | |
91 | rcu_read_lock(); | |
92 | oldnode = list_first_or_null_rcu(self_node_db, | |
4fe25bd8 | 93 | struct hsr_node, mac_list); |
f421436a AB |
94 | if (oldnode) { |
95 | list_replace_rcu(&oldnode->mac_list, &node->mac_list); | |
96 | rcu_read_unlock(); | |
97 | synchronize_rcu(); | |
98 | kfree(oldnode); | |
99 | } else { | |
100 | rcu_read_unlock(); | |
101 | list_add_tail_rcu(&node->mac_list, self_node_db); | |
102 | } | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
b9a1e627 | 107 | void hsr_del_self_node(struct list_head *self_node_db) |
6caabe7f MW |
108 | { |
109 | struct hsr_node *node; | |
110 | ||
111 | rcu_read_lock(); | |
112 | node = list_first_or_null_rcu(self_node_db, struct hsr_node, mac_list); | |
113 | rcu_read_unlock(); | |
114 | if (node) { | |
115 | list_del_rcu(&node->mac_list); | |
116 | kfree(node); | |
117 | } | |
118 | } | |
f421436a | 119 | |
b9a1e627 CW |
120 | void hsr_del_nodes(struct list_head *node_db) |
121 | { | |
122 | struct hsr_node *node; | |
123 | struct hsr_node *tmp; | |
124 | ||
125 | list_for_each_entry_safe(node, tmp, node_db, mac_list) | |
126 | kfree(node); | |
127 | } | |
128 | ||
b1b4aa91 | 129 | /* Allocate an hsr_node and add it to node_db. 'addr' is the node's address_A; |
f266a683 AB |
130 | * seq_out is used to initialize filtering of outgoing duplicate frames |
131 | * originating from the newly added node. | |
f421436a | 132 | */ |
f266a683 AB |
133 | struct hsr_node *hsr_add_node(struct list_head *node_db, unsigned char addr[], |
134 | u16 seq_out) | |
f421436a | 135 | { |
f266a683 | 136 | struct hsr_node *node; |
f421436a | 137 | unsigned long now; |
f266a683 | 138 | int i; |
f421436a AB |
139 | |
140 | node = kzalloc(sizeof(*node), GFP_ATOMIC); | |
141 | if (!node) | |
142 | return NULL; | |
143 | ||
b1b4aa91 | 144 | ether_addr_copy(node->macaddress_A, addr); |
f421436a AB |
145 | |
146 | /* We are only interested in time diffs here, so use current jiffies | |
147 | * as initialization. (0 could trigger an spurious ring error warning). | |
148 | */ | |
149 | now = jiffies; | |
c5a75911 | 150 | for (i = 0; i < HSR_PT_PORTS; i++) |
f421436a | 151 | node->time_in[i] = now; |
c5a75911 | 152 | for (i = 0; i < HSR_PT_PORTS; i++) |
f266a683 | 153 | node->seq_out[i] = seq_out; |
f421436a | 154 | |
f266a683 | 155 | list_add_tail_rcu(&node->mac_list, node_db); |
f421436a AB |
156 | |
157 | return node; | |
158 | } | |
159 | ||
f266a683 AB |
160 | /* Get the hsr_node from which 'skb' was sent. |
161 | */ | |
675c8da0 | 162 | struct hsr_node *hsr_get_node(struct hsr_port *port, struct sk_buff *skb, |
f266a683 AB |
163 | bool is_sup) |
164 | { | |
675c8da0 | 165 | struct list_head *node_db = &port->hsr->node_db; |
f266a683 AB |
166 | struct hsr_node *node; |
167 | struct ethhdr *ethhdr; | |
168 | u16 seq_out; | |
169 | ||
170 | if (!skb_mac_header_was_set(skb)) | |
171 | return NULL; | |
172 | ||
5fa96778 | 173 | ethhdr = (struct ethhdr *)skb_mac_header(skb); |
f266a683 AB |
174 | |
175 | list_for_each_entry_rcu(node, node_db, mac_list) { | |
b1b4aa91 | 176 | if (ether_addr_equal(node->macaddress_A, ethhdr->h_source)) |
f266a683 | 177 | return node; |
b1b4aa91 | 178 | if (ether_addr_equal(node->macaddress_B, ethhdr->h_source)) |
f266a683 AB |
179 | return node; |
180 | } | |
181 | ||
ee1c2797 | 182 | /* Everyone may create a node entry, connected node to a HSR device. */ |
f266a683 | 183 | |
05947783 MK |
184 | if (ethhdr->h_proto == htons(ETH_P_PRP) || |
185 | ethhdr->h_proto == htons(ETH_P_HSR)) { | |
f266a683 AB |
186 | /* Use the existing sequence_nr from the tag as starting point |
187 | * for filtering duplicate frames. | |
188 | */ | |
189 | seq_out = hsr_get_skb_sequence_nr(skb) - 1; | |
190 | } else { | |
675c8da0 KM |
191 | /* this is called also for frames from master port and |
192 | * so warn only for non master ports | |
193 | */ | |
194 | if (port->type != HSR_PT_MASTER) | |
195 | WARN_ONCE(1, "%s: Non-HSR frame\n", __func__); | |
ee1c2797 | 196 | seq_out = HSR_SEQNR_START; |
f266a683 AB |
197 | } |
198 | ||
199 | return hsr_add_node(node_db, ethhdr->h_source, seq_out); | |
200 | } | |
201 | ||
b1b4aa91 MK |
202 | /* Use the Supervision frame's info about an eventual macaddress_B for merging |
203 | * nodes that has previously had their macaddress_B registered as a separate | |
f266a683 AB |
204 | * node. |
205 | */ | |
206 | void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr, | |
207 | struct hsr_port *port_rcv) | |
208 | { | |
ee1c2797 | 209 | struct ethhdr *ethhdr; |
f266a683 AB |
210 | struct hsr_node *node_real; |
211 | struct hsr_sup_payload *hsr_sp; | |
212 | struct list_head *node_db; | |
213 | int i; | |
214 | ||
5fa96778 | 215 | ethhdr = (struct ethhdr *)skb_mac_header(skb); |
f266a683 | 216 | |
ee1c2797 PH |
217 | /* Leave the ethernet header. */ |
218 | skb_pull(skb, sizeof(struct ethhdr)); | |
219 | ||
220 | /* And leave the HSR tag. */ | |
221 | if (ethhdr->h_proto == htons(ETH_P_HSR)) | |
222 | skb_pull(skb, sizeof(struct hsr_tag)); | |
223 | ||
224 | /* And leave the HSR sup tag. */ | |
225 | skb_pull(skb, sizeof(struct hsr_sup_tag)); | |
226 | ||
5fa96778 | 227 | hsr_sp = (struct hsr_sup_payload *)skb->data; |
f266a683 | 228 | |
b1b4aa91 | 229 | /* Merge node_curr (registered on macaddress_B) into node_real */ |
f266a683 | 230 | node_db = &port_rcv->hsr->node_db; |
b1b4aa91 | 231 | node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A); |
f266a683 AB |
232 | if (!node_real) |
233 | /* No frame received from AddrA of this node yet */ | |
b1b4aa91 | 234 | node_real = hsr_add_node(node_db, hsr_sp->macaddress_A, |
f266a683 AB |
235 | HSR_SEQNR_START - 1); |
236 | if (!node_real) | |
237 | goto done; /* No mem */ | |
238 | if (node_real == node_curr) | |
239 | /* Node has already been merged */ | |
240 | goto done; | |
241 | ||
b1b4aa91 | 242 | ether_addr_copy(node_real->macaddress_B, ethhdr->h_source); |
f266a683 AB |
243 | for (i = 0; i < HSR_PT_PORTS; i++) { |
244 | if (!node_curr->time_in_stale[i] && | |
245 | time_after(node_curr->time_in[i], node_real->time_in[i])) { | |
246 | node_real->time_in[i] = node_curr->time_in[i]; | |
d595b85a MK |
247 | node_real->time_in_stale[i] = |
248 | node_curr->time_in_stale[i]; | |
f266a683 AB |
249 | } |
250 | if (seq_nr_after(node_curr->seq_out[i], node_real->seq_out[i])) | |
251 | node_real->seq_out[i] = node_curr->seq_out[i]; | |
252 | } | |
b1b4aa91 | 253 | node_real->addr_B_port = port_rcv->type; |
f266a683 AB |
254 | |
255 | list_del_rcu(&node_curr->mac_list); | |
256 | kfree_rcu(node_curr, rcu_head); | |
257 | ||
258 | done: | |
ee1c2797 | 259 | skb_push(skb, sizeof(struct hsrv1_ethhdr_sp)); |
f266a683 AB |
260 | } |
261 | ||
f421436a AB |
262 | /* 'skb' is a frame meant for this host, that is to be passed to upper layers. |
263 | * | |
f266a683 | 264 | * If the frame was sent by a node's B interface, replace the source |
b1b4aa91 | 265 | * address with that node's "official" address (macaddress_A) so that upper |
f421436a AB |
266 | * layers recognize where it came from. |
267 | */ | |
f266a683 | 268 | void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb) |
f421436a | 269 | { |
f421436a AB |
270 | if (!skb_mac_header_was_set(skb)) { |
271 | WARN_ONCE(1, "%s: Mac header not set\n", __func__); | |
272 | return; | |
273 | } | |
f421436a | 274 | |
b1b4aa91 | 275 | memcpy(ð_hdr(skb)->h_source, node->macaddress_A, ETH_ALEN); |
f421436a AB |
276 | } |
277 | ||
f421436a | 278 | /* 'skb' is a frame meant for another host. |
f266a683 | 279 | * 'port' is the outgoing interface |
f421436a AB |
280 | * |
281 | * Substitute the target (dest) MAC address if necessary, so the it matches the | |
282 | * recipient interface MAC address, regardless of whether that is the | |
283 | * recipient's A or B interface. | |
284 | * This is needed to keep the packets flowing through switches that learn on | |
285 | * which "side" the different interfaces are. | |
286 | */ | |
f266a683 | 287 | void hsr_addr_subst_dest(struct hsr_node *node_src, struct sk_buff *skb, |
c5a75911 | 288 | struct hsr_port *port) |
f421436a | 289 | { |
f266a683 | 290 | struct hsr_node *node_dst; |
f421436a | 291 | |
f266a683 AB |
292 | if (!skb_mac_header_was_set(skb)) { |
293 | WARN_ONCE(1, "%s: Mac header not set\n", __func__); | |
294 | return; | |
295 | } | |
f421436a | 296 | |
f266a683 AB |
297 | if (!is_unicast_ether_addr(eth_hdr(skb)->h_dest)) |
298 | return; | |
f421436a | 299 | |
b1b4aa91 MK |
300 | node_dst = find_node_by_addr_A(&port->hsr->node_db, |
301 | eth_hdr(skb)->h_dest); | |
f266a683 AB |
302 | if (!node_dst) { |
303 | WARN_ONCE(1, "%s: Unknown node\n", __func__); | |
304 | return; | |
305 | } | |
b1b4aa91 | 306 | if (port->type != node_dst->addr_B_port) |
f266a683 | 307 | return; |
f421436a | 308 | |
b1b4aa91 | 309 | ether_addr_copy(eth_hdr(skb)->h_dest, node_dst->macaddress_B); |
f421436a | 310 | } |
f421436a | 311 | |
f266a683 AB |
312 | void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port, |
313 | u16 sequence_nr) | |
f421436a | 314 | { |
f266a683 AB |
315 | /* Don't register incoming frames without a valid sequence number. This |
316 | * ensures entries of restarted nodes gets pruned so that they can | |
317 | * re-register and resume communications. | |
318 | */ | |
319 | if (seq_nr_before(sequence_nr, node->seq_out[port->type])) | |
320 | return; | |
321 | ||
c5a75911 AB |
322 | node->time_in[port->type] = jiffies; |
323 | node->time_in_stale[port->type] = false; | |
f421436a AB |
324 | } |
325 | ||
f421436a AB |
326 | /* 'skb' is a HSR Ethernet frame (with a HSR tag inserted), with a valid |
327 | * ethhdr->h_source address and skb->mac_header set. | |
328 | * | |
329 | * Return: | |
330 | * 1 if frame can be shown to have been sent recently on this interface, | |
331 | * 0 otherwise, or | |
332 | * negative error code on error | |
333 | */ | |
f266a683 AB |
334 | int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node, |
335 | u16 sequence_nr) | |
f421436a | 336 | { |
c5a75911 | 337 | if (seq_nr_before_or_eq(sequence_nr, node->seq_out[port->type])) |
f421436a AB |
338 | return 1; |
339 | ||
c5a75911 | 340 | node->seq_out[port->type] = sequence_nr; |
f421436a AB |
341 | return 0; |
342 | } | |
343 | ||
c5a75911 AB |
344 | static struct hsr_port *get_late_port(struct hsr_priv *hsr, |
345 | struct hsr_node *node) | |
f421436a | 346 | { |
c5a75911 AB |
347 | if (node->time_in_stale[HSR_PT_SLAVE_A]) |
348 | return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); | |
349 | if (node->time_in_stale[HSR_PT_SLAVE_B]) | |
350 | return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); | |
351 | ||
352 | if (time_after(node->time_in[HSR_PT_SLAVE_B], | |
353 | node->time_in[HSR_PT_SLAVE_A] + | |
354 | msecs_to_jiffies(MAX_SLAVE_DIFF))) | |
355 | return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); | |
356 | if (time_after(node->time_in[HSR_PT_SLAVE_A], | |
357 | node->time_in[HSR_PT_SLAVE_B] + | |
358 | msecs_to_jiffies(MAX_SLAVE_DIFF))) | |
359 | return hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); | |
f421436a | 360 | |
c5a75911 | 361 | return NULL; |
f421436a AB |
362 | } |
363 | ||
f421436a AB |
364 | /* Remove stale sequence_nr records. Called by timer every |
365 | * HSR_LIFE_CHECK_INTERVAL (two seconds or so). | |
366 | */ | |
dda436b7 | 367 | void hsr_prune_nodes(struct timer_list *t) |
f421436a | 368 | { |
dda436b7 | 369 | struct hsr_priv *hsr = from_timer(hsr, t, prune_timer); |
70ebe4a4 | 370 | struct hsr_node *node; |
c5a75911 | 371 | struct hsr_port *port; |
f421436a AB |
372 | unsigned long timestamp; |
373 | unsigned long time_a, time_b; | |
374 | ||
375 | rcu_read_lock(); | |
70ebe4a4 | 376 | list_for_each_entry_rcu(node, &hsr->node_db, mac_list) { |
d2daa127 AO |
377 | /* Don't prune own node. Neither time_in[HSR_PT_SLAVE_A] |
378 | * nor time_in[HSR_PT_SLAVE_B], will ever be updated for | |
379 | * the master port. Thus the master node will be repeatedly | |
380 | * pruned leading to packet loss. | |
381 | */ | |
382 | if (hsr_addr_is_self(hsr, node->macaddress_A)) | |
383 | continue; | |
384 | ||
f421436a | 385 | /* Shorthand */ |
c5a75911 AB |
386 | time_a = node->time_in[HSR_PT_SLAVE_A]; |
387 | time_b = node->time_in[HSR_PT_SLAVE_B]; | |
f421436a AB |
388 | |
389 | /* Check for timestamps old enough to risk wrap-around */ | |
d131fcc6 | 390 | if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2)) |
c5a75911 | 391 | node->time_in_stale[HSR_PT_SLAVE_A] = true; |
d131fcc6 | 392 | if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2)) |
c5a75911 | 393 | node->time_in_stale[HSR_PT_SLAVE_B] = true; |
f421436a AB |
394 | |
395 | /* Get age of newest frame from node. | |
396 | * At least one time_in is OK here; nodes get pruned long | |
397 | * before both time_ins can get stale | |
398 | */ | |
399 | timestamp = time_a; | |
c5a75911 AB |
400 | if (node->time_in_stale[HSR_PT_SLAVE_A] || |
401 | (!node->time_in_stale[HSR_PT_SLAVE_B] && | |
f421436a AB |
402 | time_after(time_b, time_a))) |
403 | timestamp = time_b; | |
404 | ||
405 | /* Warn of ring error only as long as we get frames at all */ | |
406 | if (time_is_after_jiffies(timestamp + | |
d131fcc6 | 407 | msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) { |
c5a75911 AB |
408 | rcu_read_lock(); |
409 | port = get_late_port(hsr, node); | |
05ca6e64 | 410 | if (port) |
b1b4aa91 | 411 | hsr_nl_ringerror(hsr, node->macaddress_A, port); |
c5a75911 | 412 | rcu_read_unlock(); |
f421436a AB |
413 | } |
414 | ||
415 | /* Prune old entries */ | |
416 | if (time_is_before_jiffies(timestamp + | |
d595b85a | 417 | msecs_to_jiffies(HSR_NODE_FORGET_TIME))) { |
b1b4aa91 | 418 | hsr_nl_nodedown(hsr, node->macaddress_A); |
f421436a AB |
419 | list_del_rcu(&node->mac_list); |
420 | /* Note that we need to free this entry later: */ | |
1aee6cc2 | 421 | kfree_rcu(node, rcu_head); |
f421436a AB |
422 | } |
423 | } | |
424 | rcu_read_unlock(); | |
5150b45f AK |
425 | |
426 | /* Restart timer */ | |
427 | mod_timer(&hsr->prune_timer, | |
428 | jiffies + msecs_to_jiffies(PRUNE_PERIOD)); | |
f421436a AB |
429 | } |
430 | ||
70ebe4a4 | 431 | void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos, |
f421436a AB |
432 | unsigned char addr[ETH_ALEN]) |
433 | { | |
70ebe4a4 | 434 | struct hsr_node *node; |
f421436a AB |
435 | |
436 | if (!_pos) { | |
70ebe4a4 AB |
437 | node = list_first_or_null_rcu(&hsr->node_db, |
438 | struct hsr_node, mac_list); | |
f421436a | 439 | if (node) |
b1b4aa91 | 440 | ether_addr_copy(addr, node->macaddress_A); |
f421436a AB |
441 | return node; |
442 | } | |
443 | ||
444 | node = _pos; | |
70ebe4a4 | 445 | list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) { |
b1b4aa91 | 446 | ether_addr_copy(addr, node->macaddress_A); |
f421436a AB |
447 | return node; |
448 | } | |
449 | ||
450 | return NULL; | |
451 | } | |
452 | ||
70ebe4a4 | 453 | int hsr_get_node_data(struct hsr_priv *hsr, |
f421436a AB |
454 | const unsigned char *addr, |
455 | unsigned char addr_b[ETH_ALEN], | |
456 | unsigned int *addr_b_ifindex, | |
457 | int *if1_age, | |
458 | u16 *if1_seq, | |
459 | int *if2_age, | |
460 | u16 *if2_seq) | |
461 | { | |
70ebe4a4 | 462 | struct hsr_node *node; |
c5a75911 | 463 | struct hsr_port *port; |
f421436a AB |
464 | unsigned long tdiff; |
465 | ||
f421436a | 466 | rcu_read_lock(); |
b1b4aa91 | 467 | node = find_node_by_addr_A(&hsr->node_db, addr); |
f421436a AB |
468 | if (!node) { |
469 | rcu_read_unlock(); | |
470 | return -ENOENT; /* No such entry */ | |
471 | } | |
472 | ||
b1b4aa91 | 473 | ether_addr_copy(addr_b, node->macaddress_B); |
f421436a | 474 | |
c5a75911 AB |
475 | tdiff = jiffies - node->time_in[HSR_PT_SLAVE_A]; |
476 | if (node->time_in_stale[HSR_PT_SLAVE_A]) | |
f421436a AB |
477 | *if1_age = INT_MAX; |
478 | #if HZ <= MSEC_PER_SEC | |
479 | else if (tdiff > msecs_to_jiffies(INT_MAX)) | |
480 | *if1_age = INT_MAX; | |
481 | #endif | |
482 | else | |
483 | *if1_age = jiffies_to_msecs(tdiff); | |
484 | ||
c5a75911 AB |
485 | tdiff = jiffies - node->time_in[HSR_PT_SLAVE_B]; |
486 | if (node->time_in_stale[HSR_PT_SLAVE_B]) | |
f421436a AB |
487 | *if2_age = INT_MAX; |
488 | #if HZ <= MSEC_PER_SEC | |
489 | else if (tdiff > msecs_to_jiffies(INT_MAX)) | |
490 | *if2_age = INT_MAX; | |
491 | #endif | |
492 | else | |
493 | *if2_age = jiffies_to_msecs(tdiff); | |
494 | ||
495 | /* Present sequence numbers as if they were incoming on interface */ | |
c5a75911 AB |
496 | *if1_seq = node->seq_out[HSR_PT_SLAVE_B]; |
497 | *if2_seq = node->seq_out[HSR_PT_SLAVE_A]; | |
f421436a | 498 | |
b1b4aa91 MK |
499 | if (node->addr_B_port != HSR_PT_NONE) { |
500 | port = hsr_port_get_hsr(hsr, node->addr_B_port); | |
c5a75911 AB |
501 | *addr_b_ifindex = port->dev->ifindex; |
502 | } else { | |
f421436a | 503 | *addr_b_ifindex = -1; |
c5a75911 | 504 | } |
f421436a AB |
505 | |
506 | rcu_read_unlock(); | |
507 | ||
508 | return 0; | |
509 | } |