forked from ~ljy/RK356X_SDK_RELEASE
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hc
2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/net/hsr/hsr_framereg.c
....@@ -1,9 +1,5 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /* 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.
73  *
84  * Author(s):
95  *	2011-2014 Arvid Brodin, arvid.brodin@alten.se
....@@ -12,6 +8,7 @@
128  * interface. A frame is identified by its source MAC address and its HSR
139  * sequence number. This code keeps track of senders and their sequence numbers
1410  * to allow filtering of duplicate frames, and to detect HSR ring errors.
11
+ * Same code handles filtering of duplicates for PRP as well.
1512  */
1613 
1714 #include <linux/if_ether.h>
....@@ -22,22 +19,7 @@
2219 #include "hsr_framereg.h"
2320 #include "hsr_netlink.h"
2421 
25
-
26
-struct hsr_node {
27
-	struct list_head	mac_list;
28
-	unsigned char		MacAddressA[ETH_ALEN];
29
-	unsigned char		MacAddressB[ETH_ALEN];
30
-	/* Local slave through which AddrB frames are received from this node */
31
-	enum hsr_port_type	AddrB_port;
32
-	unsigned long		time_in[HSR_PT_PORTS];
33
-	bool			time_in_stale[HSR_PT_PORTS];
34
-	u16			seq_out[HSR_PT_PORTS];
35
-	struct rcu_head		rcu_head;
36
-};
37
-
38
-
3922 /*	TODO: use hash lists for mac addresses (linux/jhash.h)?    */
40
-
4123 
4224 /* seq_nr_after(a, b) - return true if a is after (higher in sequence than) b,
4325  * false otherwise.
....@@ -47,15 +29,14 @@
4729 	/* Remove inconsistency where
4830 	 * seq_nr_after(a, b) == seq_nr_before(a, b)
4931 	 */
50
-	if ((int) b - a == 32768)
32
+	if ((int)b - a == 32768)
5133 		return false;
5234 
53
-	return (((s16) (b - a)) < 0);
35
+	return (((s16)(b - a)) < 0);
5436 }
55
-#define seq_nr_before(a, b)		seq_nr_after((b), (a))
56
-#define seq_nr_after_or_eq(a, b)	(!seq_nr_before((a), (b)))
57
-#define seq_nr_before_or_eq(a, b)	(!seq_nr_after((a), (b)))
5837 
38
+#define seq_nr_before(a, b)		seq_nr_after((b), (a))
39
+#define seq_nr_before_or_eq(a, b)	(!seq_nr_after((a), (b)))
5940 
6041 bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr)
6142 {
....@@ -68,9 +49,9 @@
6849 		return false;
6950 	}
7051 
71
-	if (ether_addr_equal(addr, node->MacAddressA))
52
+	if (ether_addr_equal(addr, node->macaddress_A))
7253 		return true;
73
-	if (ether_addr_equal(addr, node->MacAddressB))
54
+	if (ether_addr_equal(addr, node->macaddress_B))
7455 		return true;
7556 
7657 	return false;
....@@ -78,152 +59,231 @@
7859 
7960 /* Search for mac entry. Caller must hold rcu read lock.
8061  */
81
-static struct hsr_node *find_node_by_AddrA(struct list_head *node_db,
82
-					   const unsigned char addr[ETH_ALEN])
62
+static struct hsr_node *find_node_by_addr_A(struct list_head *node_db,
63
+					    const unsigned char addr[ETH_ALEN])
8364 {
8465 	struct hsr_node *node;
8566 
8667 	list_for_each_entry_rcu(node, node_db, mac_list) {
87
-		if (ether_addr_equal(node->MacAddressA, addr))
68
+		if (ether_addr_equal(node->macaddress_A, addr))
8869 			return node;
8970 	}
9071 
9172 	return NULL;
9273 }
9374 
94
-
9575 /* Helper for device init; the self_node_db is used in hsr_rcv() to recognize
9676  * frames from self that's been looped over the HSR ring.
9777  */
98
-int hsr_create_self_node(struct list_head *self_node_db,
78
+int hsr_create_self_node(struct hsr_priv *hsr,
9979 			 unsigned char addr_a[ETH_ALEN],
10080 			 unsigned char addr_b[ETH_ALEN])
10181 {
82
+	struct list_head *self_node_db = &hsr->self_node_db;
10283 	struct hsr_node *node, *oldnode;
10384 
10485 	node = kmalloc(sizeof(*node), GFP_KERNEL);
10586 	if (!node)
10687 		return -ENOMEM;
10788 
108
-	ether_addr_copy(node->MacAddressA, addr_a);
109
-	ether_addr_copy(node->MacAddressB, addr_b);
89
+	ether_addr_copy(node->macaddress_A, addr_a);
90
+	ether_addr_copy(node->macaddress_B, addr_b);
11091 
111
-	rcu_read_lock();
92
+	spin_lock_bh(&hsr->list_lock);
11293 	oldnode = list_first_or_null_rcu(self_node_db,
113
-						struct hsr_node, mac_list);
94
+					 struct hsr_node, mac_list);
11495 	if (oldnode) {
11596 		list_replace_rcu(&oldnode->mac_list, &node->mac_list);
116
-		rcu_read_unlock();
117
-		synchronize_rcu();
118
-		kfree(oldnode);
97
+		spin_unlock_bh(&hsr->list_lock);
98
+		kfree_rcu(oldnode, rcu_head);
11999 	} else {
120
-		rcu_read_unlock();
121100 		list_add_tail_rcu(&node->mac_list, self_node_db);
101
+		spin_unlock_bh(&hsr->list_lock);
122102 	}
123103 
124104 	return 0;
125105 }
126106 
127
-void hsr_del_node(struct list_head *self_node_db)
107
+void hsr_del_self_node(struct hsr_priv *hsr)
128108 {
109
+	struct list_head *self_node_db = &hsr->self_node_db;
129110 	struct hsr_node *node;
130111 
131
-	rcu_read_lock();
112
+	spin_lock_bh(&hsr->list_lock);
132113 	node = list_first_or_null_rcu(self_node_db, struct hsr_node, mac_list);
133
-	rcu_read_unlock();
134114 	if (node) {
135115 		list_del_rcu(&node->mac_list);
136
-		kfree(node);
116
+		kfree_rcu(node, rcu_head);
137117 	}
118
+	spin_unlock_bh(&hsr->list_lock);
138119 }
139120 
140
-/* Allocate an hsr_node and add it to node_db. 'addr' is the node's AddressA;
121
+void hsr_del_nodes(struct list_head *node_db)
122
+{
123
+	struct hsr_node *node;
124
+	struct hsr_node *tmp;
125
+
126
+	list_for_each_entry_safe(node, tmp, node_db, mac_list)
127
+		kfree(node);
128
+}
129
+
130
+void prp_handle_san_frame(bool san, enum hsr_port_type port,
131
+			  struct hsr_node *node)
132
+{
133
+	/* Mark if the SAN node is over LAN_A or LAN_B */
134
+	if (port == HSR_PT_SLAVE_A) {
135
+		node->san_a = true;
136
+		return;
137
+	}
138
+
139
+	if (port == HSR_PT_SLAVE_B)
140
+		node->san_b = true;
141
+}
142
+
143
+/* Allocate an hsr_node and add it to node_db. 'addr' is the node's address_A;
141144  * seq_out is used to initialize filtering of outgoing duplicate frames
142145  * originating from the newly added node.
143146  */
144
-struct hsr_node *hsr_add_node(struct list_head *node_db, unsigned char addr[],
145
-			      u16 seq_out)
147
+static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
148
+				     struct list_head *node_db,
149
+				     unsigned char addr[],
150
+				     u16 seq_out, bool san,
151
+				     enum hsr_port_type rx_port)
146152 {
147
-	struct hsr_node *node;
153
+	struct hsr_node *new_node, *node;
148154 	unsigned long now;
149155 	int i;
150156 
151
-	node = kzalloc(sizeof(*node), GFP_ATOMIC);
152
-	if (!node)
157
+	new_node = kzalloc(sizeof(*new_node), GFP_ATOMIC);
158
+	if (!new_node)
153159 		return NULL;
154160 
155
-	ether_addr_copy(node->MacAddressA, addr);
161
+	ether_addr_copy(new_node->macaddress_A, addr);
162
+	spin_lock_init(&new_node->seq_out_lock);
156163 
157164 	/* We are only interested in time diffs here, so use current jiffies
158165 	 * as initialization. (0 could trigger an spurious ring error warning).
159166 	 */
160167 	now = jiffies;
168
+	for (i = 0; i < HSR_PT_PORTS; i++) {
169
+		new_node->time_in[i] = now;
170
+		new_node->time_out[i] = now;
171
+	}
161172 	for (i = 0; i < HSR_PT_PORTS; i++)
162
-		node->time_in[i] = now;
163
-	for (i = 0; i < HSR_PT_PORTS; i++)
164
-		node->seq_out[i] = seq_out;
173
+		new_node->seq_out[i] = seq_out;
165174 
166
-	list_add_tail_rcu(&node->mac_list, node_db);
175
+	if (san && hsr->proto_ops->handle_san_frame)
176
+		hsr->proto_ops->handle_san_frame(san, rx_port, new_node);
167177 
178
+	spin_lock_bh(&hsr->list_lock);
179
+	list_for_each_entry_rcu(node, node_db, mac_list,
180
+				lockdep_is_held(&hsr->list_lock)) {
181
+		if (ether_addr_equal(node->macaddress_A, addr))
182
+			goto out;
183
+		if (ether_addr_equal(node->macaddress_B, addr))
184
+			goto out;
185
+	}
186
+	list_add_tail_rcu(&new_node->mac_list, node_db);
187
+	spin_unlock_bh(&hsr->list_lock);
188
+	return new_node;
189
+out:
190
+	spin_unlock_bh(&hsr->list_lock);
191
+	kfree(new_node);
168192 	return node;
193
+}
194
+
195
+void prp_update_san_info(struct hsr_node *node, bool is_sup)
196
+{
197
+	if (!is_sup)
198
+		return;
199
+
200
+	node->san_a = false;
201
+	node->san_b = false;
169202 }
170203 
171204 /* Get the hsr_node from which 'skb' was sent.
172205  */
173
-struct hsr_node *hsr_get_node(struct hsr_port *port, struct sk_buff *skb,
174
-			      bool is_sup)
206
+struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db,
207
+			      struct sk_buff *skb, bool is_sup,
208
+			      enum hsr_port_type rx_port)
175209 {
176
-	struct list_head *node_db = &port->hsr->node_db;
210
+	struct hsr_priv *hsr = port->hsr;
177211 	struct hsr_node *node;
178212 	struct ethhdr *ethhdr;
213
+	struct prp_rct *rct;
214
+	bool san = false;
179215 	u16 seq_out;
180216 
181217 	if (!skb_mac_header_was_set(skb))
182218 		return NULL;
183219 
184
-	ethhdr = (struct ethhdr *) skb_mac_header(skb);
220
+	ethhdr = (struct ethhdr *)skb_mac_header(skb);
185221 
186222 	list_for_each_entry_rcu(node, node_db, mac_list) {
187
-		if (ether_addr_equal(node->MacAddressA, ethhdr->h_source))
223
+		if (ether_addr_equal(node->macaddress_A, ethhdr->h_source)) {
224
+			if (hsr->proto_ops->update_san_info)
225
+				hsr->proto_ops->update_san_info(node, is_sup);
188226 			return node;
189
-		if (ether_addr_equal(node->MacAddressB, ethhdr->h_source))
227
+		}
228
+		if (ether_addr_equal(node->macaddress_B, ethhdr->h_source)) {
229
+			if (hsr->proto_ops->update_san_info)
230
+				hsr->proto_ops->update_san_info(node, is_sup);
190231 			return node;
232
+		}
191233 	}
192234 
193
-	/* Everyone may create a node entry, connected node to a HSR device. */
194
-
195
-	if (ethhdr->h_proto == htons(ETH_P_PRP)
196
-			|| ethhdr->h_proto == htons(ETH_P_HSR)) {
235
+	/* Everyone may create a node entry, connected node to a HSR/PRP
236
+	 * device.
237
+	 */
238
+	if (ethhdr->h_proto == htons(ETH_P_PRP) ||
239
+	    ethhdr->h_proto == htons(ETH_P_HSR)) {
197240 		/* Use the existing sequence_nr from the tag as starting point
198241 		 * for filtering duplicate frames.
199242 		 */
200243 		seq_out = hsr_get_skb_sequence_nr(skb) - 1;
201244 	} else {
202
-		/* this is called also for frames from master port and
203
-		 * so warn only for non master ports
204
-		 */
205
-		if (port->type != HSR_PT_MASTER)
206
-			WARN_ONCE(1, "%s: Non-HSR frame\n", __func__);
207
-		seq_out = HSR_SEQNR_START;
245
+		rct = skb_get_PRP_rct(skb);
246
+		if (rct && prp_check_lsdu_size(skb, rct, is_sup)) {
247
+			seq_out = prp_get_skb_sequence_nr(rct);
248
+		} else {
249
+			if (rx_port != HSR_PT_MASTER)
250
+				san = true;
251
+			seq_out = HSR_SEQNR_START;
252
+		}
208253 	}
209254 
210
-	return hsr_add_node(node_db, ethhdr->h_source, seq_out);
255
+	return hsr_add_node(hsr, node_db, ethhdr->h_source, seq_out,
256
+			    san, rx_port);
211257 }
212258 
213
-/* Use the Supervision frame's info about an eventual MacAddressB for merging
214
- * nodes that has previously had their MacAddressB registered as a separate
259
+/* Use the Supervision frame's info about an eventual macaddress_B for merging
260
+ * nodes that has previously had their macaddress_B registered as a separate
215261  * node.
216262  */
217
-void hsr_handle_sup_frame(struct sk_buff *skb, struct hsr_node *node_curr,
218
-			  struct hsr_port *port_rcv)
263
+void hsr_handle_sup_frame(struct hsr_frame_info *frame)
219264 {
220
-	struct ethhdr *ethhdr;
221
-	struct hsr_node *node_real;
265
+	struct hsr_node *node_curr = frame->node_src;
266
+	struct hsr_port *port_rcv = frame->port_rcv;
267
+	struct hsr_priv *hsr = port_rcv->hsr;
222268 	struct hsr_sup_payload *hsr_sp;
269
+	struct hsr_node *node_real;
270
+	struct sk_buff *skb = NULL;
223271 	struct list_head *node_db;
272
+	struct ethhdr *ethhdr;
224273 	int i;
225274 
226
-	ethhdr = (struct ethhdr *) skb_mac_header(skb);
275
+	/* Here either frame->skb_hsr or frame->skb_prp should be
276
+	 * valid as supervision frame always will have protocol
277
+	 * header info.
278
+	 */
279
+	if (frame->skb_hsr)
280
+		skb = frame->skb_hsr;
281
+	else if (frame->skb_prp)
282
+		skb = frame->skb_prp;
283
+	if (!skb)
284
+		return;
285
+
286
+	ethhdr = (struct ethhdr *)skb_mac_header(skb);
227287 
228288 	/* Leave the ethernet header. */
229289 	skb_pull(skb, sizeof(struct ethhdr));
....@@ -235,45 +295,54 @@
235295 	/* And leave the HSR sup tag. */
236296 	skb_pull(skb, sizeof(struct hsr_sup_tag));
237297 
238
-	hsr_sp = (struct hsr_sup_payload *) skb->data;
298
+	hsr_sp = (struct hsr_sup_payload *)skb->data;
239299 
240
-	/* Merge node_curr (registered on MacAddressB) into node_real */
300
+	/* Merge node_curr (registered on macaddress_B) into node_real */
241301 	node_db = &port_rcv->hsr->node_db;
242
-	node_real = find_node_by_AddrA(node_db, hsr_sp->MacAddressA);
302
+	node_real = find_node_by_addr_A(node_db, hsr_sp->macaddress_A);
243303 	if (!node_real)
244304 		/* No frame received from AddrA of this node yet */
245
-		node_real = hsr_add_node(node_db, hsr_sp->MacAddressA,
246
-					 HSR_SEQNR_START - 1);
305
+		node_real = hsr_add_node(hsr, node_db, hsr_sp->macaddress_A,
306
+					 HSR_SEQNR_START - 1, true,
307
+					 port_rcv->type);
247308 	if (!node_real)
248309 		goto done; /* No mem */
249310 	if (node_real == node_curr)
250311 		/* Node has already been merged */
251312 		goto done;
252313 
253
-	ether_addr_copy(node_real->MacAddressB, ethhdr->h_source);
314
+	ether_addr_copy(node_real->macaddress_B, ethhdr->h_source);
315
+	spin_lock_bh(&node_real->seq_out_lock);
254316 	for (i = 0; i < HSR_PT_PORTS; i++) {
255317 		if (!node_curr->time_in_stale[i] &&
256318 		    time_after(node_curr->time_in[i], node_real->time_in[i])) {
257319 			node_real->time_in[i] = node_curr->time_in[i];
258
-			node_real->time_in_stale[i] = node_curr->time_in_stale[i];
320
+			node_real->time_in_stale[i] =
321
+						node_curr->time_in_stale[i];
259322 		}
260323 		if (seq_nr_after(node_curr->seq_out[i], node_real->seq_out[i]))
261324 			node_real->seq_out[i] = node_curr->seq_out[i];
262325 	}
263
-	node_real->AddrB_port = port_rcv->type;
326
+	spin_unlock_bh(&node_real->seq_out_lock);
327
+	node_real->addr_B_port = port_rcv->type;
264328 
329
+	spin_lock_bh(&hsr->list_lock);
265330 	list_del_rcu(&node_curr->mac_list);
331
+	spin_unlock_bh(&hsr->list_lock);
266332 	kfree_rcu(node_curr, rcu_head);
267333 
268334 done:
269
-	skb_push(skb, sizeof(struct hsrv1_ethhdr_sp));
335
+	/* PRP uses v0 header */
336
+	if (ethhdr->h_proto == htons(ETH_P_HSR))
337
+		skb_push(skb, sizeof(struct hsrv1_ethhdr_sp));
338
+	else
339
+		skb_push(skb, sizeof(struct hsrv0_ethhdr_sp));
270340 }
271
-
272341 
273342 /* 'skb' is a frame meant for this host, that is to be passed to upper layers.
274343  *
275344  * If the frame was sent by a node's B interface, replace the source
276
- * address with that node's "official" address (MacAddressA) so that upper
345
+ * address with that node's "official" address (macaddress_A) so that upper
277346  * layers recognize where it came from.
278347  */
279348 void hsr_addr_subst_source(struct hsr_node *node, struct sk_buff *skb)
....@@ -283,7 +352,7 @@
283352 		return;
284353 	}
285354 
286
-	memcpy(&eth_hdr(skb)->h_source, node->MacAddressA, ETH_ALEN);
355
+	memcpy(&eth_hdr(skb)->h_source, node->macaddress_A, ETH_ALEN);
287356 }
288357 
289358 /* 'skb' is a frame meant for another host.
....@@ -308,18 +377,19 @@
308377 	if (!is_unicast_ether_addr(eth_hdr(skb)->h_dest))
309378 		return;
310379 
311
-	node_dst = find_node_by_AddrA(&port->hsr->node_db, eth_hdr(skb)->h_dest);
380
+	node_dst = find_node_by_addr_A(&port->hsr->node_db,
381
+				       eth_hdr(skb)->h_dest);
312382 	if (!node_dst) {
313
-		if (net_ratelimit())
383
+		if (port->hsr->prot_version != PRP_V1 && net_ratelimit())
314384 			netdev_err(skb->dev, "%s: Unknown node\n", __func__);
315385 		return;
316386 	}
317
-	if (port->type != node_dst->AddrB_port)
387
+	if (port->type != node_dst->addr_B_port)
318388 		return;
319389 
320
-	ether_addr_copy(eth_hdr(skb)->h_dest, node_dst->MacAddressB);
390
+	if (is_valid_ether_addr(node_dst->macaddress_B))
391
+		ether_addr_copy(eth_hdr(skb)->h_dest, node_dst->macaddress_B);
321392 }
322
-
323393 
324394 void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
325395 			   u16 sequence_nr)
....@@ -346,13 +416,19 @@
346416 int hsr_register_frame_out(struct hsr_port *port, struct hsr_node *node,
347417 			   u16 sequence_nr)
348418 {
349
-	if (seq_nr_before_or_eq(sequence_nr, node->seq_out[port->type]))
419
+	spin_lock_bh(&node->seq_out_lock);
420
+	if (seq_nr_before_or_eq(sequence_nr, node->seq_out[port->type]) &&
421
+	    time_is_after_jiffies(node->time_out[port->type] +
422
+	    msecs_to_jiffies(HSR_ENTRY_FORGET_TIME))) {
423
+		spin_unlock_bh(&node->seq_out_lock);
350424 		return 1;
425
+	}
351426 
427
+	node->time_out[port->type] = jiffies;
352428 	node->seq_out[port->type] = sequence_nr;
429
+	spin_unlock_bh(&node->seq_out_lock);
353430 	return 0;
354431 }
355
-
356432 
357433 static struct hsr_port *get_late_port(struct hsr_priv *hsr,
358434 				      struct hsr_node *node)
....@@ -374,7 +450,6 @@
374450 	return NULL;
375451 }
376452 
377
-
378453 /* Remove stale sequence_nr records. Called by timer every
379454  * HSR_LIFE_CHECK_INTERVAL (two seconds or so).
380455  */
....@@ -382,20 +457,29 @@
382457 {
383458 	struct hsr_priv *hsr = from_timer(hsr, t, prune_timer);
384459 	struct hsr_node *node;
460
+	struct hsr_node *tmp;
385461 	struct hsr_port *port;
386462 	unsigned long timestamp;
387463 	unsigned long time_a, time_b;
388464 
389
-	rcu_read_lock();
390
-	list_for_each_entry_rcu(node, &hsr->node_db, mac_list) {
465
+	spin_lock_bh(&hsr->list_lock);
466
+	list_for_each_entry_safe(node, tmp, &hsr->node_db, mac_list) {
467
+		/* Don't prune own node. Neither time_in[HSR_PT_SLAVE_A]
468
+		 * nor time_in[HSR_PT_SLAVE_B], will ever be updated for
469
+		 * the master port. Thus the master node will be repeatedly
470
+		 * pruned leading to packet loss.
471
+		 */
472
+		if (hsr_addr_is_self(hsr, node->macaddress_A))
473
+			continue;
474
+
391475 		/* Shorthand */
392476 		time_a = node->time_in[HSR_PT_SLAVE_A];
393477 		time_b = node->time_in[HSR_PT_SLAVE_B];
394478 
395479 		/* Check for timestamps old enough to risk wrap-around */
396
-		if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET/2))
480
+		if (time_after(jiffies, time_a + MAX_JIFFY_OFFSET / 2))
397481 			node->time_in_stale[HSR_PT_SLAVE_A] = true;
398
-		if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET/2))
482
+		if (time_after(jiffies, time_b + MAX_JIFFY_OFFSET / 2))
399483 			node->time_in_stale[HSR_PT_SLAVE_B] = true;
400484 
401485 		/* Get age of newest frame from node.
....@@ -410,26 +494,29 @@
410494 
411495 		/* Warn of ring error only as long as we get frames at all */
412496 		if (time_is_after_jiffies(timestamp +
413
-					msecs_to_jiffies(1.5*MAX_SLAVE_DIFF))) {
497
+				msecs_to_jiffies(1.5 * MAX_SLAVE_DIFF))) {
414498 			rcu_read_lock();
415499 			port = get_late_port(hsr, node);
416
-			if (port != NULL)
417
-				hsr_nl_ringerror(hsr, node->MacAddressA, port);
500
+			if (port)
501
+				hsr_nl_ringerror(hsr, node->macaddress_A, port);
418502 			rcu_read_unlock();
419503 		}
420504 
421505 		/* Prune old entries */
422506 		if (time_is_before_jiffies(timestamp +
423
-					msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
424
-			hsr_nl_nodedown(hsr, node->MacAddressA);
507
+				msecs_to_jiffies(HSR_NODE_FORGET_TIME))) {
508
+			hsr_nl_nodedown(hsr, node->macaddress_A);
425509 			list_del_rcu(&node->mac_list);
426510 			/* Note that we need to free this entry later: */
427511 			kfree_rcu(node, rcu_head);
428512 		}
429513 	}
430
-	rcu_read_unlock();
431
-}
514
+	spin_unlock_bh(&hsr->list_lock);
432515 
516
+	/* Restart timer */
517
+	mod_timer(&hsr->prune_timer,
518
+		  jiffies + msecs_to_jiffies(PRUNE_PERIOD));
519
+}
433520 
434521 void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos,
435522 			unsigned char addr[ETH_ALEN])
....@@ -440,19 +527,18 @@
440527 		node = list_first_or_null_rcu(&hsr->node_db,
441528 					      struct hsr_node, mac_list);
442529 		if (node)
443
-			ether_addr_copy(addr, node->MacAddressA);
530
+			ether_addr_copy(addr, node->macaddress_A);
444531 		return node;
445532 	}
446533 
447534 	node = _pos;
448535 	list_for_each_entry_continue_rcu(node, &hsr->node_db, mac_list) {
449
-		ether_addr_copy(addr, node->MacAddressA);
536
+		ether_addr_copy(addr, node->macaddress_A);
450537 		return node;
451538 	}
452539 
453540 	return NULL;
454541 }
455
-
456542 
457543 int hsr_get_node_data(struct hsr_priv *hsr,
458544 		      const unsigned char *addr,
....@@ -467,11 +553,11 @@
467553 	struct hsr_port *port;
468554 	unsigned long tdiff;
469555 
470
-	node = find_node_by_AddrA(&hsr->node_db, addr);
556
+	node = find_node_by_addr_A(&hsr->node_db, addr);
471557 	if (!node)
472558 		return -ENOENT;
473559 
474
-	ether_addr_copy(addr_b, node->MacAddressB);
560
+	ether_addr_copy(addr_b, node->macaddress_B);
475561 
476562 	tdiff = jiffies - node->time_in[HSR_PT_SLAVE_A];
477563 	if (node->time_in_stale[HSR_PT_SLAVE_A])
....@@ -497,8 +583,8 @@
497583 	*if1_seq = node->seq_out[HSR_PT_SLAVE_B];
498584 	*if2_seq = node->seq_out[HSR_PT_SLAVE_A];
499585 
500
-	if (node->AddrB_port != HSR_PT_NONE) {
501
-		port = hsr_port_get_hsr(hsr, node->AddrB_port);
586
+	if (node->addr_B_port != HSR_PT_NONE) {
587
+		port = hsr_port_get_hsr(hsr, node->addr_B_port);
502588 		*addr_b_ifindex = port->dev->ifindex;
503589 	} else {
504590 		*addr_b_ifindex = -1;