1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright 2011-2014 Autronica Fire and Security AS
5 * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
7 * Routines for handling Netlink messages for HSR.
10 #include "hsr_netlink.h"
11 #include <linux/kernel.h>
12 #include <net/rtnetlink.h>
13 #include <net/genetlink.h>
15 #include "hsr_device.h"
16 #include "hsr_framereg.h"
18 static const struct nla_policy hsr_policy[IFLA_HSR_MAX + 1] = {
19 [IFLA_HSR_SLAVE1] = { .type = NLA_U32 },
20 [IFLA_HSR_SLAVE2] = { .type = NLA_U32 },
21 [IFLA_HSR_MULTICAST_SPEC] = { .type = NLA_U8 },
22 [IFLA_HSR_VERSION] = { .type = NLA_U8 },
23 [IFLA_HSR_SUPERVISION_ADDR] = { .len = ETH_ALEN },
24 [IFLA_HSR_SEQ_NR] = { .type = NLA_U16 },
27 /* Here, it seems a netdevice has already been allocated for us, and the
28 * hsr_dev_setup routine has been executed. Nice!
30 static int hsr_newlink(struct net *src_net, struct net_device *dev,
31 struct nlattr *tb[], struct nlattr *data[],
32 struct netlink_ext_ack *extack)
34 struct net_device *link[2];
35 unsigned char multicast_spec, hsr_version;
38 netdev_info(dev, "HSR: No slave devices specified\n");
41 if (!data[IFLA_HSR_SLAVE1]) {
42 netdev_info(dev, "HSR: Slave1 device not specified\n");
45 link[0] = __dev_get_by_index(src_net,
46 nla_get_u32(data[IFLA_HSR_SLAVE1]));
47 if (!data[IFLA_HSR_SLAVE2]) {
48 netdev_info(dev, "HSR: Slave2 device not specified\n");
51 link[1] = __dev_get_by_index(src_net,
52 nla_get_u32(data[IFLA_HSR_SLAVE2]));
54 if (!link[0] || !link[1])
56 if (link[0] == link[1])
59 if (!data[IFLA_HSR_MULTICAST_SPEC])
62 multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]);
64 if (!data[IFLA_HSR_VERSION])
67 hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]);
69 return hsr_dev_finalize(dev, link, multicast_spec, hsr_version);
72 static void hsr_dellink(struct net_device *hsr_dev, struct list_head *head)
74 hsr_dev_destroy(hsr_dev);
75 unregister_netdevice_queue(hsr_dev, head);
78 static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev)
81 struct hsr_port *port;
84 hsr = netdev_priv(dev);
89 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
91 res = nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex);
97 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
99 res = nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex);
102 goto nla_put_failure;
104 if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN,
105 hsr->sup_multicast_addr) ||
106 nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr))
107 goto nla_put_failure;
115 static struct rtnl_link_ops hsr_link_ops __read_mostly = {
117 .maxtype = IFLA_HSR_MAX,
118 .policy = hsr_policy,
119 .priv_size = sizeof(struct hsr_priv),
120 .setup = hsr_dev_setup,
121 .newlink = hsr_newlink,
122 .dellink = hsr_dellink,
123 .fill_info = hsr_fill_info,
126 /* attribute policy */
127 static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = {
128 [HSR_A_NODE_ADDR] = { .len = ETH_ALEN },
129 [HSR_A_NODE_ADDR_B] = { .len = ETH_ALEN },
130 [HSR_A_IFINDEX] = { .type = NLA_U32 },
131 [HSR_A_IF1_AGE] = { .type = NLA_U32 },
132 [HSR_A_IF2_AGE] = { .type = NLA_U32 },
133 [HSR_A_IF1_SEQ] = { .type = NLA_U16 },
134 [HSR_A_IF2_SEQ] = { .type = NLA_U16 },
137 static struct genl_family hsr_genl_family;
139 static const struct genl_multicast_group hsr_mcgrps[] = {
140 { .name = "hsr-network", },
143 /* This is called if for some node with MAC address addr, we only get frames
144 * over one of the slave interfaces. This would indicate an open network ring
145 * (i.e. a link has failed somewhere).
147 void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN],
148 struct hsr_port *port)
152 struct hsr_port *master;
155 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
159 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0,
162 goto nla_put_failure;
164 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
166 goto nla_put_failure;
168 res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex);
170 goto nla_put_failure;
172 genlmsg_end(skb, msg_head);
173 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
182 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
183 netdev_warn(master->dev, "Could not send HSR ring error message\n");
187 /* This is called when we haven't heard from the node with MAC address addr for
188 * some time (just before the node is removed from the node table/list).
190 void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN])
194 struct hsr_port *master;
197 skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
201 msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN);
203 goto nla_put_failure;
205 res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr);
207 goto nla_put_failure;
209 genlmsg_end(skb, msg_head);
210 genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC);
219 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
220 netdev_warn(master->dev, "Could not send HSR node down\n");
224 /* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table
225 * about the status of a specific node in the network, defined by its MAC
228 * Input: hsr ifindex, node mac address
229 * Output: hsr ifindex, node mac address (copied from request),
230 * age of latest frame from node over slave 1, slave 2 [ms]
232 static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info)
236 struct net_device *hsr_dev;
239 struct sk_buff *skb_out;
241 struct hsr_priv *hsr;
242 struct hsr_port *port;
243 unsigned char hsr_node_addr_b[ETH_ALEN];
244 int hsr_node_if1_age;
245 u16 hsr_node_if1_seq;
246 int hsr_node_if2_age;
247 u16 hsr_node_if2_seq;
254 na = info->attrs[HSR_A_IFINDEX];
257 na = info->attrs[HSR_A_NODE_ADDR];
261 hsr_dev = __dev_get_by_index(genl_info_net(info),
262 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
265 if (!is_hsr_master(hsr_dev))
269 skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
275 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
276 info->snd_seq, &hsr_genl_family, 0,
277 HSR_C_SET_NODE_STATUS);
280 goto nla_put_failure;
283 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
285 goto nla_put_failure;
287 hsr = netdev_priv(hsr_dev);
288 res = hsr_get_node_data(hsr,
290 nla_data(info->attrs[HSR_A_NODE_ADDR]),
298 goto nla_put_failure;
300 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN,
301 nla_data(info->attrs[HSR_A_NODE_ADDR]));
303 goto nla_put_failure;
305 if (addr_b_ifindex > -1) {
306 res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN,
309 goto nla_put_failure;
311 res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX,
314 goto nla_put_failure;
317 res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age);
319 goto nla_put_failure;
320 res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq);
322 goto nla_put_failure;
324 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A);
326 res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX,
330 goto nla_put_failure;
332 res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age);
334 goto nla_put_failure;
335 res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq);
337 goto nla_put_failure;
339 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
341 res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX,
345 goto nla_put_failure;
347 genlmsg_end(skb_out, msg_head);
348 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
353 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
364 /* Get a list of MacAddressA of all nodes known to this node (including self).
366 static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info)
370 struct net_device *hsr_dev;
373 struct sk_buff *skb_out;
375 struct hsr_priv *hsr;
377 unsigned char addr[ETH_ALEN];
383 na = info->attrs[HSR_A_IFINDEX];
387 hsr_dev = __dev_get_by_index(genl_info_net(info),
388 nla_get_u32(info->attrs[HSR_A_IFINDEX]));
391 if (!is_hsr_master(hsr_dev))
395 skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
401 msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid,
402 info->snd_seq, &hsr_genl_family, 0,
403 HSR_C_SET_NODE_LIST);
406 goto nla_put_failure;
409 res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex);
411 goto nla_put_failure;
413 hsr = netdev_priv(hsr_dev);
416 pos = hsr_get_next_node(hsr, NULL, addr);
418 res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr);
421 goto nla_put_failure;
423 pos = hsr_get_next_node(hsr, pos, addr);
427 genlmsg_end(skb_out, msg_head);
428 genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid);
433 netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL);
444 static const struct genl_ops hsr_ops[] = {
446 .cmd = HSR_C_GET_NODE_STATUS,
447 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
449 .doit = hsr_get_node_status,
453 .cmd = HSR_C_GET_NODE_LIST,
454 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
456 .doit = hsr_get_node_list,
461 static struct genl_family hsr_genl_family __ro_after_init = {
465 .maxattr = HSR_A_MAX,
466 .policy = hsr_genl_policy,
467 .module = THIS_MODULE,
469 .n_ops = ARRAY_SIZE(hsr_ops),
470 .mcgrps = hsr_mcgrps,
471 .n_mcgrps = ARRAY_SIZE(hsr_mcgrps),
474 int __init hsr_netlink_init(void)
478 rc = rtnl_link_register(&hsr_link_ops);
480 goto fail_rtnl_link_register;
482 rc = genl_register_family(&hsr_genl_family);
484 goto fail_genl_register_family;
488 fail_genl_register_family:
489 rtnl_link_unregister(&hsr_link_ops);
490 fail_rtnl_link_register:
495 void __exit hsr_netlink_exit(void)
497 genl_unregister_family(&hsr_genl_family);
498 rtnl_link_unregister(&hsr_link_ops);
501 MODULE_ALIAS_RTNL_LINK("hsr");