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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 | 6 | * |
8f4c0e01 | 7 | * Routines for handling Netlink messages for HSR and PRP. |
f421436a AB |
8 | */ |
9 | ||
10 | #include "hsr_netlink.h" | |
11 | #include <linux/kernel.h> | |
12 | #include <net/rtnetlink.h> | |
13 | #include <net/genetlink.h> | |
14 | #include "hsr_main.h" | |
15 | #include "hsr_device.h" | |
16 | #include "hsr_framereg.h" | |
17 | ||
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 }, | |
ee1c2797 | 22 | [IFLA_HSR_VERSION] = { .type = NLA_U8 }, |
f9375729 | 23 | [IFLA_HSR_SUPERVISION_ADDR] = { .len = ETH_ALEN }, |
98bf8362 | 24 | [IFLA_HSR_SEQ_NR] = { .type = NLA_U16 }, |
8f4c0e01 | 25 | [IFLA_HSR_PROTOCOL] = { .type = NLA_U8 }, |
5055cccf | 26 | [IFLA_HSR_INTERLINK] = { .type = NLA_U32 }, |
f421436a AB |
27 | }; |
28 | ||
f421436a AB |
29 | /* Here, it seems a netdevice has already been allocated for us, and the |
30 | * hsr_dev_setup routine has been executed. Nice! | |
31 | */ | |
32 | static int hsr_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
33 | struct nlattr *tb[], struct nlattr *data[], |
34 | struct netlink_ext_ack *extack) | |
f421436a | 35 | { |
8f4c0e01 MK |
36 | enum hsr_version proto_version; |
37 | unsigned char multicast_spec; | |
38 | u8 proto = HSR_PROTOCOL_HSR; | |
f421436a | 39 | |
5055cccf | 40 | struct net_device *link[2], *interlink = NULL; |
a718dcc5 | 41 | if (!data) { |
13eeb5fe | 42 | NL_SET_ERR_MSG_MOD(extack, "No slave devices specified"); |
a718dcc5 AB |
43 | return -EINVAL; |
44 | } | |
f421436a | 45 | if (!data[IFLA_HSR_SLAVE1]) { |
13eeb5fe | 46 | NL_SET_ERR_MSG_MOD(extack, "Slave1 device not specified"); |
f421436a AB |
47 | return -EINVAL; |
48 | } | |
d595b85a MK |
49 | link[0] = __dev_get_by_index(src_net, |
50 | nla_get_u32(data[IFLA_HSR_SLAVE1])); | |
13eeb5fe TY |
51 | if (!link[0]) { |
52 | NL_SET_ERR_MSG_MOD(extack, "Slave1 does not exist"); | |
53 | return -EINVAL; | |
54 | } | |
f421436a | 55 | if (!data[IFLA_HSR_SLAVE2]) { |
13eeb5fe | 56 | NL_SET_ERR_MSG_MOD(extack, "Slave2 device not specified"); |
f421436a AB |
57 | return -EINVAL; |
58 | } | |
d595b85a MK |
59 | link[1] = __dev_get_by_index(src_net, |
60 | nla_get_u32(data[IFLA_HSR_SLAVE2])); | |
13eeb5fe TY |
61 | if (!link[1]) { |
62 | NL_SET_ERR_MSG_MOD(extack, "Slave2 does not exist"); | |
63 | return -EINVAL; | |
64 | } | |
f421436a | 65 | |
13eeb5fe TY |
66 | if (link[0] == link[1]) { |
67 | NL_SET_ERR_MSG_MOD(extack, "Slave1 and Slave2 are same"); | |
f421436a | 68 | return -EINVAL; |
13eeb5fe | 69 | } |
f421436a | 70 | |
5055cccf LM |
71 | if (data[IFLA_HSR_INTERLINK]) |
72 | interlink = __dev_get_by_index(src_net, | |
73 | nla_get_u32(data[IFLA_HSR_INTERLINK])); | |
74 | ||
75 | if (interlink && interlink == link[0]) { | |
76 | NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave1 are the same"); | |
77 | return -EINVAL; | |
78 | } | |
79 | ||
80 | if (interlink && interlink == link[1]) { | |
81 | NL_SET_ERR_MSG_MOD(extack, "Interlink and Slave2 are the same"); | |
82 | return -EINVAL; | |
83 | } | |
84 | ||
f421436a AB |
85 | if (!data[IFLA_HSR_MULTICAST_SPEC]) |
86 | multicast_spec = 0; | |
87 | else | |
88 | multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); | |
89 | ||
8f4c0e01 MK |
90 | if (data[IFLA_HSR_PROTOCOL]) |
91 | proto = nla_get_u8(data[IFLA_HSR_PROTOCOL]); | |
92 | ||
93 | if (proto >= HSR_PROTOCOL_MAX) { | |
b87f9fe1 | 94 | NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol"); |
8f4c0e01 MK |
95 | return -EINVAL; |
96 | } | |
97 | ||
4faab8c4 | 98 | if (!data[IFLA_HSR_VERSION]) { |
8f4c0e01 | 99 | proto_version = HSR_V0; |
4faab8c4 | 100 | } else { |
8f4c0e01 | 101 | if (proto == HSR_PROTOCOL_PRP) { |
b87f9fe1 | 102 | NL_SET_ERR_MSG_MOD(extack, "PRP version unsupported"); |
8f4c0e01 MK |
103 | return -EINVAL; |
104 | } | |
105 | ||
106 | proto_version = nla_get_u8(data[IFLA_HSR_VERSION]); | |
107 | if (proto_version > HSR_V1) { | |
4faab8c4 | 108 | NL_SET_ERR_MSG_MOD(extack, |
b87f9fe1 | 109 | "Only HSR version 0/1 supported"); |
4faab8c4 TY |
110 | return -EINVAL; |
111 | } | |
112 | } | |
ee1c2797 | 113 | |
5055cccf | 114 | if (proto == HSR_PROTOCOL_PRP) { |
8f4c0e01 | 115 | proto_version = PRP_V1; |
5055cccf LM |
116 | if (interlink) { |
117 | NL_SET_ERR_MSG_MOD(extack, | |
118 | "Interlink only works with HSR"); | |
119 | return -EINVAL; | |
120 | } | |
121 | } | |
8f4c0e01 | 122 | |
5055cccf LM |
123 | return hsr_dev_finalize(dev, link, interlink, multicast_spec, |
124 | proto_version, extack); | |
f421436a AB |
125 | } |
126 | ||
de0083c7 TY |
127 | static void hsr_dellink(struct net_device *dev, struct list_head *head) |
128 | { | |
129 | struct hsr_priv *hsr = netdev_priv(dev); | |
130 | ||
131 | del_timer_sync(&hsr->prune_timer); | |
5055cccf | 132 | del_timer_sync(&hsr->prune_proxy_timer); |
de0083c7 TY |
133 | del_timer_sync(&hsr->announce_timer); |
134 | ||
135 | hsr_debugfs_term(hsr); | |
136 | hsr_del_ports(hsr); | |
137 | ||
138 | hsr_del_self_node(hsr); | |
e012764c | 139 | hsr_del_nodes(&hsr->node_db); |
5055cccf | 140 | hsr_del_nodes(&hsr->proxy_node_db); |
de0083c7 TY |
141 | |
142 | unregister_netdevice_queue(dev, head); | |
143 | } | |
144 | ||
98bf8362 AB |
145 | static int hsr_fill_info(struct sk_buff *skb, const struct net_device *dev) |
146 | { | |
81390d0c | 147 | struct hsr_priv *hsr = netdev_priv(dev); |
8f4c0e01 | 148 | u8 proto = HSR_PROTOCOL_HSR; |
c5a75911 | 149 | struct hsr_port *port; |
98bf8362 | 150 | |
c5a75911 | 151 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
81390d0c TY |
152 | if (port) { |
153 | if (nla_put_u32(skb, IFLA_HSR_SLAVE1, port->dev->ifindex)) | |
154 | goto nla_put_failure; | |
155 | } | |
51f3c605 | 156 | |
c5a75911 | 157 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
81390d0c TY |
158 | if (port) { |
159 | if (nla_put_u32(skb, IFLA_HSR_SLAVE2, port->dev->ifindex)) | |
160 | goto nla_put_failure; | |
161 | } | |
98bf8362 AB |
162 | |
163 | if (nla_put(skb, IFLA_HSR_SUPERVISION_ADDR, ETH_ALEN, | |
70ebe4a4 AB |
164 | hsr->sup_multicast_addr) || |
165 | nla_put_u16(skb, IFLA_HSR_SEQ_NR, hsr->sequence_nr)) | |
98bf8362 | 166 | goto nla_put_failure; |
8f4c0e01 MK |
167 | if (hsr->prot_version == PRP_V1) |
168 | proto = HSR_PROTOCOL_PRP; | |
169 | if (nla_put_u8(skb, IFLA_HSR_PROTOCOL, proto)) | |
170 | goto nla_put_failure; | |
98bf8362 AB |
171 | |
172 | return 0; | |
173 | ||
174 | nla_put_failure: | |
175 | return -EMSGSIZE; | |
176 | } | |
177 | ||
f421436a AB |
178 | static struct rtnl_link_ops hsr_link_ops __read_mostly = { |
179 | .kind = "hsr", | |
180 | .maxtype = IFLA_HSR_MAX, | |
181 | .policy = hsr_policy, | |
182 | .priv_size = sizeof(struct hsr_priv), | |
183 | .setup = hsr_dev_setup, | |
184 | .newlink = hsr_newlink, | |
de0083c7 | 185 | .dellink = hsr_dellink, |
98bf8362 | 186 | .fill_info = hsr_fill_info, |
f421436a AB |
187 | }; |
188 | ||
f421436a | 189 | /* attribute policy */ |
f421436a | 190 | static const struct nla_policy hsr_genl_policy[HSR_A_MAX + 1] = { |
f9375729 PH |
191 | [HSR_A_NODE_ADDR] = { .len = ETH_ALEN }, |
192 | [HSR_A_NODE_ADDR_B] = { .len = ETH_ALEN }, | |
f421436a AB |
193 | [HSR_A_IFINDEX] = { .type = NLA_U32 }, |
194 | [HSR_A_IF1_AGE] = { .type = NLA_U32 }, | |
195 | [HSR_A_IF2_AGE] = { .type = NLA_U32 }, | |
196 | [HSR_A_IF1_SEQ] = { .type = NLA_U16 }, | |
197 | [HSR_A_IF2_SEQ] = { .type = NLA_U16 }, | |
198 | }; | |
199 | ||
489111e5 | 200 | static struct genl_family hsr_genl_family; |
f421436a | 201 | |
2a94fe48 JB |
202 | static const struct genl_multicast_group hsr_mcgrps[] = { |
203 | { .name = "hsr-network", }, | |
f421436a AB |
204 | }; |
205 | ||
f421436a AB |
206 | /* This is called if for some node with MAC address addr, we only get frames |
207 | * over one of the slave interfaces. This would indicate an open network ring | |
208 | * (i.e. a link has failed somewhere). | |
209 | */ | |
70ebe4a4 | 210 | void hsr_nl_ringerror(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN], |
c5a75911 | 211 | struct hsr_port *port) |
f421436a AB |
212 | { |
213 | struct sk_buff *skb; | |
214 | void *msg_head; | |
c5a75911 | 215 | struct hsr_port *master; |
f421436a | 216 | int res; |
f421436a AB |
217 | |
218 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
219 | if (!skb) | |
220 | goto fail; | |
221 | ||
d595b85a MK |
222 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, |
223 | HSR_C_RING_ERROR); | |
f421436a AB |
224 | if (!msg_head) |
225 | goto nla_put_failure; | |
226 | ||
227 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
228 | if (res < 0) | |
229 | goto nla_put_failure; | |
230 | ||
c5a75911 | 231 | res = nla_put_u32(skb, HSR_A_IFINDEX, port->dev->ifindex); |
f421436a AB |
232 | if (res < 0) |
233 | goto nla_put_failure; | |
234 | ||
235 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 236 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
237 | |
238 | return; | |
239 | ||
240 | nla_put_failure: | |
241 | kfree_skb(skb); | |
242 | ||
243 | fail: | |
c5a75911 AB |
244 | rcu_read_lock(); |
245 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
246 | netdev_warn(master->dev, "Could not send HSR ring error message\n"); | |
247 | rcu_read_unlock(); | |
f421436a AB |
248 | } |
249 | ||
250 | /* This is called when we haven't heard from the node with MAC address addr for | |
251 | * some time (just before the node is removed from the node table/list). | |
252 | */ | |
70ebe4a4 | 253 | void hsr_nl_nodedown(struct hsr_priv *hsr, unsigned char addr[ETH_ALEN]) |
f421436a AB |
254 | { |
255 | struct sk_buff *skb; | |
256 | void *msg_head; | |
c5a75911 | 257 | struct hsr_port *master; |
f421436a AB |
258 | int res; |
259 | ||
260 | skb = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); | |
261 | if (!skb) | |
262 | goto fail; | |
263 | ||
264 | msg_head = genlmsg_put(skb, 0, 0, &hsr_genl_family, 0, HSR_C_NODE_DOWN); | |
265 | if (!msg_head) | |
266 | goto nla_put_failure; | |
267 | ||
f421436a AB |
268 | res = nla_put(skb, HSR_A_NODE_ADDR, ETH_ALEN, addr); |
269 | if (res < 0) | |
270 | goto nla_put_failure; | |
271 | ||
272 | genlmsg_end(skb, msg_head); | |
2a94fe48 | 273 | genlmsg_multicast(&hsr_genl_family, skb, 0, 0, GFP_ATOMIC); |
f421436a AB |
274 | |
275 | return; | |
276 | ||
277 | nla_put_failure: | |
278 | kfree_skb(skb); | |
279 | ||
280 | fail: | |
c5a75911 AB |
281 | rcu_read_lock(); |
282 | master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); | |
283 | netdev_warn(master->dev, "Could not send HSR node down\n"); | |
284 | rcu_read_unlock(); | |
f421436a AB |
285 | } |
286 | ||
f421436a AB |
287 | /* HSR_C_GET_NODE_STATUS lets userspace query the internal HSR node table |
288 | * about the status of a specific node in the network, defined by its MAC | |
289 | * address. | |
290 | * | |
291 | * Input: hsr ifindex, node mac address | |
292 | * Output: hsr ifindex, node mac address (copied from request), | |
293 | * age of latest frame from node over slave 1, slave 2 [ms] | |
294 | */ | |
295 | static int hsr_get_node_status(struct sk_buff *skb_in, struct genl_info *info) | |
296 | { | |
297 | /* For receiving */ | |
298 | struct nlattr *na; | |
c5a75911 | 299 | struct net_device *hsr_dev; |
f421436a AB |
300 | |
301 | /* For sending */ | |
302 | struct sk_buff *skb_out; | |
303 | void *msg_head; | |
70ebe4a4 | 304 | struct hsr_priv *hsr; |
c5a75911 | 305 | struct hsr_port *port; |
f421436a AB |
306 | unsigned char hsr_node_addr_b[ETH_ALEN]; |
307 | int hsr_node_if1_age; | |
308 | u16 hsr_node_if1_seq; | |
309 | int hsr_node_if2_age; | |
310 | u16 hsr_node_if2_seq; | |
311 | int addr_b_ifindex; | |
312 | int res; | |
313 | ||
314 | if (!info) | |
315 | goto invalid; | |
316 | ||
317 | na = info->attrs[HSR_A_IFINDEX]; | |
318 | if (!na) | |
319 | goto invalid; | |
320 | na = info->attrs[HSR_A_NODE_ADDR]; | |
321 | if (!na) | |
322 | goto invalid; | |
323 | ||
173756b8 TY |
324 | rcu_read_lock(); |
325 | hsr_dev = dev_get_by_index_rcu(genl_info_net(info), | |
326 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
f421436a | 327 | if (!hsr_dev) |
173756b8 | 328 | goto rcu_unlock; |
f421436a | 329 | if (!is_hsr_master(hsr_dev)) |
173756b8 | 330 | goto rcu_unlock; |
f421436a | 331 | |
f421436a | 332 | /* Send reply */ |
173756b8 | 333 | skb_out = genlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC); |
f421436a AB |
334 | if (!skb_out) { |
335 | res = -ENOMEM; | |
336 | goto fail; | |
337 | } | |
338 | ||
339 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
4fe25bd8 MK |
340 | info->snd_seq, &hsr_genl_family, 0, |
341 | HSR_C_SET_NODE_STATUS); | |
f421436a AB |
342 | if (!msg_head) { |
343 | res = -ENOMEM; | |
344 | goto nla_put_failure; | |
345 | } | |
346 | ||
347 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
348 | if (res < 0) | |
349 | goto nla_put_failure; | |
350 | ||
70ebe4a4 AB |
351 | hsr = netdev_priv(hsr_dev); |
352 | res = hsr_get_node_data(hsr, | |
d595b85a MK |
353 | (unsigned char *) |
354 | nla_data(info->attrs[HSR_A_NODE_ADDR]), | |
355 | hsr_node_addr_b, | |
356 | &addr_b_ifindex, | |
357 | &hsr_node_if1_age, | |
358 | &hsr_node_if1_seq, | |
359 | &hsr_node_if2_age, | |
360 | &hsr_node_if2_seq); | |
f421436a | 361 | if (res < 0) |
84a035f6 | 362 | goto nla_put_failure; |
f421436a AB |
363 | |
364 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, | |
4fe25bd8 | 365 | nla_data(info->attrs[HSR_A_NODE_ADDR])); |
f421436a AB |
366 | if (res < 0) |
367 | goto nla_put_failure; | |
368 | ||
369 | if (addr_b_ifindex > -1) { | |
370 | res = nla_put(skb_out, HSR_A_NODE_ADDR_B, ETH_ALEN, | |
d595b85a | 371 | hsr_node_addr_b); |
f421436a AB |
372 | if (res < 0) |
373 | goto nla_put_failure; | |
374 | ||
d595b85a MK |
375 | res = nla_put_u32(skb_out, HSR_A_ADDR_B_IFINDEX, |
376 | addr_b_ifindex); | |
f421436a AB |
377 | if (res < 0) |
378 | goto nla_put_failure; | |
379 | } | |
380 | ||
381 | res = nla_put_u32(skb_out, HSR_A_IF1_AGE, hsr_node_if1_age); | |
382 | if (res < 0) | |
383 | goto nla_put_failure; | |
384 | res = nla_put_u16(skb_out, HSR_A_IF1_SEQ, hsr_node_if1_seq); | |
385 | if (res < 0) | |
386 | goto nla_put_failure; | |
c5a75911 AB |
387 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); |
388 | if (port) | |
389 | res = nla_put_u32(skb_out, HSR_A_IF1_IFINDEX, | |
390 | port->dev->ifindex); | |
f421436a AB |
391 | if (res < 0) |
392 | goto nla_put_failure; | |
393 | ||
394 | res = nla_put_u32(skb_out, HSR_A_IF2_AGE, hsr_node_if2_age); | |
395 | if (res < 0) | |
396 | goto nla_put_failure; | |
397 | res = nla_put_u16(skb_out, HSR_A_IF2_SEQ, hsr_node_if2_seq); | |
398 | if (res < 0) | |
399 | goto nla_put_failure; | |
c5a75911 AB |
400 | port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); |
401 | if (port) | |
402 | res = nla_put_u32(skb_out, HSR_A_IF2_IFINDEX, | |
403 | port->dev->ifindex); | |
51f3c605 AB |
404 | if (res < 0) |
405 | goto nla_put_failure; | |
f421436a | 406 | |
173756b8 TY |
407 | rcu_read_unlock(); |
408 | ||
f421436a AB |
409 | genlmsg_end(skb_out, msg_head); |
410 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
411 | ||
412 | return 0; | |
413 | ||
173756b8 TY |
414 | rcu_unlock: |
415 | rcu_read_unlock(); | |
f421436a | 416 | invalid: |
2d4bc933 | 417 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); |
f421436a AB |
418 | return 0; |
419 | ||
420 | nla_put_failure: | |
421 | kfree_skb(skb_out); | |
422 | /* Fall through */ | |
423 | ||
424 | fail: | |
173756b8 | 425 | rcu_read_unlock(); |
f421436a AB |
426 | return res; |
427 | } | |
428 | ||
f266a683 | 429 | /* Get a list of MacAddressA of all nodes known to this node (including self). |
f421436a AB |
430 | */ |
431 | static int hsr_get_node_list(struct sk_buff *skb_in, struct genl_info *info) | |
432 | { | |
ca19c70f | 433 | unsigned char addr[ETH_ALEN]; |
f421436a | 434 | struct net_device *hsr_dev; |
f421436a | 435 | struct sk_buff *skb_out; |
70ebe4a4 | 436 | struct hsr_priv *hsr; |
ca19c70f TY |
437 | bool restart = false; |
438 | struct nlattr *na; | |
439 | void *pos = NULL; | |
440 | void *msg_head; | |
f421436a AB |
441 | int res; |
442 | ||
443 | if (!info) | |
444 | goto invalid; | |
445 | ||
446 | na = info->attrs[HSR_A_IFINDEX]; | |
447 | if (!na) | |
448 | goto invalid; | |
449 | ||
173756b8 TY |
450 | rcu_read_lock(); |
451 | hsr_dev = dev_get_by_index_rcu(genl_info_net(info), | |
452 | nla_get_u32(info->attrs[HSR_A_IFINDEX])); | |
f421436a | 453 | if (!hsr_dev) |
173756b8 | 454 | goto rcu_unlock; |
f421436a | 455 | if (!is_hsr_master(hsr_dev)) |
173756b8 | 456 | goto rcu_unlock; |
f421436a | 457 | |
ca19c70f | 458 | restart: |
f421436a | 459 | /* Send reply */ |
ca19c70f | 460 | skb_out = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_ATOMIC); |
f421436a AB |
461 | if (!skb_out) { |
462 | res = -ENOMEM; | |
463 | goto fail; | |
464 | } | |
465 | ||
466 | msg_head = genlmsg_put(skb_out, NETLINK_CB(skb_in).portid, | |
4fe25bd8 MK |
467 | info->snd_seq, &hsr_genl_family, 0, |
468 | HSR_C_SET_NODE_LIST); | |
f421436a AB |
469 | if (!msg_head) { |
470 | res = -ENOMEM; | |
471 | goto nla_put_failure; | |
472 | } | |
473 | ||
ca19c70f TY |
474 | if (!restart) { |
475 | res = nla_put_u32(skb_out, HSR_A_IFINDEX, hsr_dev->ifindex); | |
476 | if (res < 0) | |
477 | goto nla_put_failure; | |
478 | } | |
f421436a | 479 | |
70ebe4a4 | 480 | hsr = netdev_priv(hsr_dev); |
f421436a | 481 | |
ca19c70f TY |
482 | if (!pos) |
483 | pos = hsr_get_next_node(hsr, NULL, addr); | |
f421436a AB |
484 | while (pos) { |
485 | res = nla_put(skb_out, HSR_A_NODE_ADDR, ETH_ALEN, addr); | |
486 | if (res < 0) { | |
ca19c70f TY |
487 | if (res == -EMSGSIZE) { |
488 | genlmsg_end(skb_out, msg_head); | |
489 | genlmsg_unicast(genl_info_net(info), skb_out, | |
490 | info->snd_portid); | |
491 | restart = true; | |
492 | goto restart; | |
493 | } | |
f421436a AB |
494 | goto nla_put_failure; |
495 | } | |
70ebe4a4 | 496 | pos = hsr_get_next_node(hsr, pos, addr); |
f421436a AB |
497 | } |
498 | rcu_read_unlock(); | |
499 | ||
500 | genlmsg_end(skb_out, msg_head); | |
501 | genlmsg_unicast(genl_info_net(info), skb_out, info->snd_portid); | |
502 | ||
503 | return 0; | |
504 | ||
173756b8 TY |
505 | rcu_unlock: |
506 | rcu_read_unlock(); | |
f421436a | 507 | invalid: |
2d4bc933 | 508 | netlink_ack(skb_in, nlmsg_hdr(skb_in), -EINVAL, NULL); |
f421436a AB |
509 | return 0; |
510 | ||
511 | nla_put_failure: | |
ca19c70f | 512 | nlmsg_free(skb_out); |
f421436a AB |
513 | /* Fall through */ |
514 | ||
515 | fail: | |
173756b8 | 516 | rcu_read_unlock(); |
f421436a AB |
517 | return res; |
518 | } | |
519 | ||
66a9b928 | 520 | static const struct genl_small_ops hsr_ops[] = { |
9504b3ee JB |
521 | { |
522 | .cmd = HSR_C_GET_NODE_STATUS, | |
ef6243ac | 523 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
9504b3ee | 524 | .flags = 0, |
9504b3ee JB |
525 | .doit = hsr_get_node_status, |
526 | .dumpit = NULL, | |
527 | }, | |
528 | { | |
529 | .cmd = HSR_C_GET_NODE_LIST, | |
ef6243ac | 530 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
9504b3ee | 531 | .flags = 0, |
9504b3ee JB |
532 | .doit = hsr_get_node_list, |
533 | .dumpit = NULL, | |
534 | }, | |
f421436a AB |
535 | }; |
536 | ||
56989f6d | 537 | static struct genl_family hsr_genl_family __ro_after_init = { |
489111e5 JB |
538 | .hdrsize = 0, |
539 | .name = "HSR", | |
540 | .version = 1, | |
541 | .maxattr = HSR_A_MAX, | |
3b0f31f2 | 542 | .policy = hsr_genl_policy, |
09e91dbe | 543 | .netnsok = true, |
489111e5 | 544 | .module = THIS_MODULE, |
66a9b928 JK |
545 | .small_ops = hsr_ops, |
546 | .n_small_ops = ARRAY_SIZE(hsr_ops), | |
9c5d03d3 | 547 | .resv_start_op = HSR_C_SET_NODE_LIST + 1, |
489111e5 JB |
548 | .mcgrps = hsr_mcgrps, |
549 | .n_mcgrps = ARRAY_SIZE(hsr_mcgrps), | |
550 | }; | |
551 | ||
f421436a AB |
552 | int __init hsr_netlink_init(void) |
553 | { | |
554 | int rc; | |
555 | ||
556 | rc = rtnl_link_register(&hsr_link_ops); | |
557 | if (rc) | |
558 | goto fail_rtnl_link_register; | |
559 | ||
489111e5 | 560 | rc = genl_register_family(&hsr_genl_family); |
f421436a AB |
561 | if (rc) |
562 | goto fail_genl_register_family; | |
563 | ||
c6c4ccd7 | 564 | hsr_debugfs_create_root(); |
f421436a AB |
565 | return 0; |
566 | ||
f421436a AB |
567 | fail_genl_register_family: |
568 | rtnl_link_unregister(&hsr_link_ops); | |
569 | fail_rtnl_link_register: | |
570 | ||
571 | return rc; | |
572 | } | |
573 | ||
574 | void __exit hsr_netlink_exit(void) | |
575 | { | |
f421436a | 576 | genl_unregister_family(&hsr_genl_family); |
f421436a AB |
577 | rtnl_link_unregister(&hsr_link_ops); |
578 | } | |
579 | ||
580 | MODULE_ALIAS_RTNL_LINK("hsr"); |