Commit | Line | Data |
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0b873931 | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
c6c8fea2 SE |
2 | * |
3 | * Marek Lindner, Simon Wunderlich | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of version 2 of the GNU General Public | |
7 | * License as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA | |
c6c8fea2 SE |
18 | */ |
19 | ||
95a066d8 SE |
20 | #include <linux/crc32c.h> |
21 | #include <linux/highmem.h> | |
c6c8fea2 | 22 | #include "main.h" |
b706b13b SE |
23 | #include "sysfs.h" |
24 | #include "debugfs.h" | |
c6c8fea2 SE |
25 | #include "routing.h" |
26 | #include "send.h" | |
27 | #include "originator.h" | |
28 | #include "soft-interface.h" | |
29 | #include "icmp_socket.h" | |
30 | #include "translation-table.h" | |
31 | #include "hard-interface.h" | |
32 | #include "gateway_client.h" | |
23721387 | 33 | #include "bridge_loop_avoidance.h" |
2f1dfbe1 | 34 | #include "distributed-arp-table.h" |
c6c8fea2 SE |
35 | #include "vis.h" |
36 | #include "hash.h" | |
1c280471 | 37 | #include "bat_algo.h" |
d353d8d4 | 38 | #include "network-coding.h" |
c6c8fea2 | 39 | |
c3caf519 SE |
40 | |
41 | /* List manipulations on hardif_list have to be rtnl_lock()'ed, | |
9cfc7bd6 SE |
42 | * list traversals just rcu-locked |
43 | */ | |
3193e8fd | 44 | struct list_head batadv_hardif_list; |
ee11ad61 | 45 | static int (*batadv_rx_handler[256])(struct sk_buff *, |
56303d34 | 46 | struct batadv_hard_iface *); |
3193e8fd | 47 | char batadv_routing_algo[20] = "BATMAN_IV"; |
ee11ad61 | 48 | static struct hlist_head batadv_algo_list; |
c6c8fea2 | 49 | |
3193e8fd | 50 | unsigned char batadv_broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
c6c8fea2 | 51 | |
3193e8fd | 52 | struct workqueue_struct *batadv_event_workqueue; |
c6c8fea2 | 53 | |
ee11ad61 | 54 | static void batadv_recv_handler_init(void); |
ffa995e0 | 55 | |
ee11ad61 | 56 | static int __init batadv_init(void) |
c6c8fea2 | 57 | { |
3193e8fd | 58 | INIT_LIST_HEAD(&batadv_hardif_list); |
ee11ad61 | 59 | INIT_HLIST_HEAD(&batadv_algo_list); |
1c280471 | 60 | |
ee11ad61 | 61 | batadv_recv_handler_init(); |
ffa995e0 | 62 | |
81c524f7 | 63 | batadv_iv_init(); |
c6c8fea2 | 64 | |
3193e8fd | 65 | batadv_event_workqueue = create_singlethread_workqueue("bat_events"); |
c6c8fea2 | 66 | |
3193e8fd | 67 | if (!batadv_event_workqueue) |
c6c8fea2 SE |
68 | return -ENOMEM; |
69 | ||
9039dc7e | 70 | batadv_socket_init(); |
40a072d7 | 71 | batadv_debugfs_init(); |
c6c8fea2 | 72 | |
9563877e | 73 | register_netdevice_notifier(&batadv_hard_if_notifier); |
a4ac28c0 | 74 | rtnl_link_register(&batadv_link_ops); |
c6c8fea2 | 75 | |
86ceb360 | 76 | pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n", |
42d0b044 | 77 | BATADV_SOURCE_VERSION, BATADV_COMPAT_VERSION); |
c6c8fea2 SE |
78 | |
79 | return 0; | |
80 | } | |
81 | ||
ee11ad61 | 82 | static void __exit batadv_exit(void) |
c6c8fea2 | 83 | { |
40a072d7 | 84 | batadv_debugfs_destroy(); |
a4ac28c0 | 85 | rtnl_link_unregister(&batadv_link_ops); |
9563877e SE |
86 | unregister_netdevice_notifier(&batadv_hard_if_notifier); |
87 | batadv_hardif_remove_interfaces(); | |
c6c8fea2 | 88 | |
3193e8fd SE |
89 | flush_workqueue(batadv_event_workqueue); |
90 | destroy_workqueue(batadv_event_workqueue); | |
91 | batadv_event_workqueue = NULL; | |
c6c8fea2 SE |
92 | |
93 | rcu_barrier(); | |
94 | } | |
95 | ||
3193e8fd | 96 | int batadv_mesh_init(struct net_device *soft_iface) |
c6c8fea2 | 97 | { |
56303d34 | 98 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
5346c35e | 99 | int ret; |
c6c8fea2 | 100 | |
c6c8fea2 SE |
101 | spin_lock_init(&bat_priv->forw_bat_list_lock); |
102 | spin_lock_init(&bat_priv->forw_bcast_list_lock); | |
807736f6 SE |
103 | spin_lock_init(&bat_priv->tt.changes_list_lock); |
104 | spin_lock_init(&bat_priv->tt.req_list_lock); | |
105 | spin_lock_init(&bat_priv->tt.roam_list_lock); | |
106 | spin_lock_init(&bat_priv->tt.last_changeset_lock); | |
107 | spin_lock_init(&bat_priv->gw.list_lock); | |
108 | spin_lock_init(&bat_priv->vis.hash_lock); | |
109 | spin_lock_init(&bat_priv->vis.list_lock); | |
c6c8fea2 SE |
110 | |
111 | INIT_HLIST_HEAD(&bat_priv->forw_bat_list); | |
112 | INIT_HLIST_HEAD(&bat_priv->forw_bcast_list); | |
807736f6 SE |
113 | INIT_HLIST_HEAD(&bat_priv->gw.list); |
114 | INIT_LIST_HEAD(&bat_priv->tt.changes_list); | |
115 | INIT_LIST_HEAD(&bat_priv->tt.req_list); | |
116 | INIT_LIST_HEAD(&bat_priv->tt.roam_list); | |
c6c8fea2 | 117 | |
7d211efc | 118 | ret = batadv_originator_init(bat_priv); |
5346c35e | 119 | if (ret < 0) |
c6c8fea2 SE |
120 | goto err; |
121 | ||
08c36d3e | 122 | ret = batadv_tt_init(bat_priv); |
5346c35e | 123 | if (ret < 0) |
c6c8fea2 SE |
124 | goto err; |
125 | ||
42d0b044 SE |
126 | batadv_tt_local_add(soft_iface, soft_iface->dev_addr, |
127 | BATADV_NULL_IFINDEX); | |
c6c8fea2 | 128 | |
d0f714f4 | 129 | ret = batadv_vis_init(bat_priv); |
5346c35e | 130 | if (ret < 0) |
c6c8fea2 SE |
131 | goto err; |
132 | ||
08adf151 | 133 | ret = batadv_bla_init(bat_priv); |
5346c35e | 134 | if (ret < 0) |
23721387 SW |
135 | goto err; |
136 | ||
2f1dfbe1 AQ |
137 | ret = batadv_dat_init(bat_priv); |
138 | if (ret < 0) | |
139 | goto err; | |
140 | ||
d353d8d4 MH |
141 | ret = batadv_nc_init(bat_priv); |
142 | if (ret < 0) | |
143 | goto err; | |
144 | ||
807736f6 | 145 | atomic_set(&bat_priv->gw.reselect, 0); |
39c75a51 | 146 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); |
5346c35e SE |
147 | |
148 | return 0; | |
c6c8fea2 SE |
149 | |
150 | err: | |
3193e8fd | 151 | batadv_mesh_free(soft_iface); |
5346c35e | 152 | return ret; |
c6c8fea2 SE |
153 | } |
154 | ||
3193e8fd | 155 | void batadv_mesh_free(struct net_device *soft_iface) |
c6c8fea2 | 156 | { |
56303d34 | 157 | struct batadv_priv *bat_priv = netdev_priv(soft_iface); |
c6c8fea2 | 158 | |
39c75a51 | 159 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_DEACTIVATING); |
c6c8fea2 | 160 | |
9455e34c | 161 | batadv_purge_outstanding_packets(bat_priv, NULL); |
c6c8fea2 | 162 | |
d0f714f4 | 163 | batadv_vis_quit(bat_priv); |
c6c8fea2 | 164 | |
7cf06bc6 | 165 | batadv_gw_node_purge(bat_priv); |
7d211efc | 166 | batadv_originator_free(bat_priv); |
d353d8d4 | 167 | batadv_nc_free(bat_priv); |
c6c8fea2 | 168 | |
08c36d3e | 169 | batadv_tt_free(bat_priv); |
c6c8fea2 | 170 | |
08adf151 | 171 | batadv_bla_free(bat_priv); |
23721387 | 172 | |
2f1dfbe1 AQ |
173 | batadv_dat_free(bat_priv); |
174 | ||
f8214865 MH |
175 | free_percpu(bat_priv->bat_counters); |
176 | ||
39c75a51 | 177 | atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); |
c6c8fea2 SE |
178 | } |
179 | ||
6e0895c2 DM |
180 | /** |
181 | * batadv_is_my_mac - check if the given mac address belongs to any of the real | |
182 | * interfaces in the current mesh | |
183 | * @bat_priv: the bat priv with all the soft interface information | |
184 | * @addr: the address to check | |
185 | */ | |
fe8a93b9 | 186 | int batadv_is_my_mac(struct batadv_priv *bat_priv, const uint8_t *addr) |
c6c8fea2 | 187 | { |
56303d34 | 188 | const struct batadv_hard_iface *hard_iface; |
c6c8fea2 SE |
189 | |
190 | rcu_read_lock(); | |
3193e8fd | 191 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
e9a4f295 | 192 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
c6c8fea2 SE |
193 | continue; |
194 | ||
fe8a93b9 AQ |
195 | if (hard_iface->soft_iface != bat_priv->soft_iface) |
196 | continue; | |
197 | ||
1eda58bf | 198 | if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) { |
c6c8fea2 SE |
199 | rcu_read_unlock(); |
200 | return 1; | |
201 | } | |
202 | } | |
203 | rcu_read_unlock(); | |
204 | return 0; | |
c6c8fea2 SE |
205 | } |
206 | ||
30da63a6 ML |
207 | /** |
208 | * batadv_seq_print_text_primary_if_get - called from debugfs table printing | |
209 | * function that requires the primary interface | |
210 | * @seq: debugfs table seq_file struct | |
211 | * | |
212 | * Returns primary interface if found or NULL otherwise. | |
213 | */ | |
214 | struct batadv_hard_iface * | |
215 | batadv_seq_print_text_primary_if_get(struct seq_file *seq) | |
216 | { | |
217 | struct net_device *net_dev = (struct net_device *)seq->private; | |
218 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
219 | struct batadv_hard_iface *primary_if; | |
220 | ||
221 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
222 | ||
223 | if (!primary_if) { | |
224 | seq_printf(seq, | |
225 | "BATMAN mesh %s disabled - please specify interfaces to enable it\n", | |
226 | net_dev->name); | |
227 | goto out; | |
228 | } | |
229 | ||
230 | if (primary_if->if_status == BATADV_IF_ACTIVE) | |
231 | goto out; | |
232 | ||
233 | seq_printf(seq, | |
234 | "BATMAN mesh %s disabled - primary interface not active\n", | |
235 | net_dev->name); | |
236 | batadv_hardif_free_ref(primary_if); | |
237 | primary_if = NULL; | |
238 | ||
239 | out: | |
240 | return primary_if; | |
241 | } | |
242 | ||
ee11ad61 | 243 | static int batadv_recv_unhandled_packet(struct sk_buff *skb, |
56303d34 | 244 | struct batadv_hard_iface *recv_if) |
ffa995e0 ML |
245 | { |
246 | return NET_RX_DROP; | |
247 | } | |
248 | ||
249 | /* incoming packets with the batman ethertype received on any active hard | |
250 | * interface | |
251 | */ | |
3193e8fd SE |
252 | int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev, |
253 | struct packet_type *ptype, | |
254 | struct net_device *orig_dev) | |
ffa995e0 | 255 | { |
56303d34 | 256 | struct batadv_priv *bat_priv; |
96412690 | 257 | struct batadv_ogm_packet *batadv_ogm_packet; |
56303d34 | 258 | struct batadv_hard_iface *hard_iface; |
ffa995e0 ML |
259 | uint8_t idx; |
260 | int ret; | |
261 | ||
56303d34 SE |
262 | hard_iface = container_of(ptype, struct batadv_hard_iface, |
263 | batman_adv_ptype); | |
ffa995e0 ML |
264 | skb = skb_share_check(skb, GFP_ATOMIC); |
265 | ||
266 | /* skb was released by skb_share_check() */ | |
267 | if (!skb) | |
268 | goto err_out; | |
269 | ||
270 | /* packet should hold at least type and version */ | |
271 | if (unlikely(!pskb_may_pull(skb, 2))) | |
272 | goto err_free; | |
273 | ||
274 | /* expect a valid ethernet header here. */ | |
275 | if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb))) | |
276 | goto err_free; | |
277 | ||
278 | if (!hard_iface->soft_iface) | |
279 | goto err_free; | |
280 | ||
281 | bat_priv = netdev_priv(hard_iface->soft_iface); | |
282 | ||
39c75a51 | 283 | if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) |
ffa995e0 ML |
284 | goto err_free; |
285 | ||
286 | /* discard frames on not active interfaces */ | |
e9a4f295 | 287 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
ffa995e0 ML |
288 | goto err_free; |
289 | ||
96412690 | 290 | batadv_ogm_packet = (struct batadv_ogm_packet *)skb->data; |
ffa995e0 | 291 | |
96412690 | 292 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
39c75a51 | 293 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 294 | "Drop packet: incompatible batman version (%i)\n", |
96412690 | 295 | batadv_ogm_packet->header.version); |
ffa995e0 ML |
296 | goto err_free; |
297 | } | |
298 | ||
299 | /* all receive handlers return whether they received or reused | |
300 | * the supplied skb. if not, we have to free the skb. | |
301 | */ | |
96412690 | 302 | idx = batadv_ogm_packet->header.packet_type; |
ee11ad61 | 303 | ret = (*batadv_rx_handler[idx])(skb, hard_iface); |
ffa995e0 ML |
304 | |
305 | if (ret == NET_RX_DROP) | |
306 | kfree_skb(skb); | |
307 | ||
308 | /* return NET_RX_SUCCESS in any case as we | |
309 | * most probably dropped the packet for | |
310 | * routing-logical reasons. | |
311 | */ | |
312 | return NET_RX_SUCCESS; | |
313 | ||
314 | err_free: | |
315 | kfree_skb(skb); | |
316 | err_out: | |
317 | return NET_RX_DROP; | |
318 | } | |
319 | ||
ee11ad61 | 320 | static void batadv_recv_handler_init(void) |
ffa995e0 ML |
321 | { |
322 | int i; | |
323 | ||
ee11ad61 SE |
324 | for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++) |
325 | batadv_rx_handler[i] = batadv_recv_unhandled_packet; | |
ffa995e0 | 326 | |
ffa995e0 | 327 | /* batman icmp packet */ |
acd34afa | 328 | batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; |
7cdcf6dd AQ |
329 | /* unicast with 4 addresses packet */ |
330 | batadv_rx_handler[BATADV_UNICAST_4ADDR] = batadv_recv_unicast_packet; | |
ffa995e0 | 331 | /* unicast packet */ |
acd34afa | 332 | batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet; |
ffa995e0 | 333 | /* fragmented unicast packet */ |
acd34afa | 334 | batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_ucast_frag_packet; |
ffa995e0 | 335 | /* broadcast packet */ |
acd34afa | 336 | batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; |
ffa995e0 | 337 | /* vis packet */ |
acd34afa | 338 | batadv_rx_handler[BATADV_VIS] = batadv_recv_vis_packet; |
ffa995e0 | 339 | /* Translation table query (request or response) */ |
acd34afa | 340 | batadv_rx_handler[BATADV_TT_QUERY] = batadv_recv_tt_query; |
ffa995e0 | 341 | /* Roaming advertisement */ |
acd34afa | 342 | batadv_rx_handler[BATADV_ROAM_ADV] = batadv_recv_roam_adv; |
ffa995e0 ML |
343 | } |
344 | ||
56303d34 SE |
345 | int |
346 | batadv_recv_handler_register(uint8_t packet_type, | |
347 | int (*recv_handler)(struct sk_buff *, | |
348 | struct batadv_hard_iface *)) | |
ffa995e0 | 349 | { |
ee11ad61 | 350 | if (batadv_rx_handler[packet_type] != &batadv_recv_unhandled_packet) |
ffa995e0 ML |
351 | return -EBUSY; |
352 | ||
ee11ad61 | 353 | batadv_rx_handler[packet_type] = recv_handler; |
ffa995e0 ML |
354 | return 0; |
355 | } | |
356 | ||
3193e8fd | 357 | void batadv_recv_handler_unregister(uint8_t packet_type) |
ffa995e0 | 358 | { |
ee11ad61 | 359 | batadv_rx_handler[packet_type] = batadv_recv_unhandled_packet; |
ffa995e0 ML |
360 | } |
361 | ||
56303d34 | 362 | static struct batadv_algo_ops *batadv_algo_get(char *name) |
1c280471 | 363 | { |
56303d34 | 364 | struct batadv_algo_ops *bat_algo_ops = NULL, *bat_algo_ops_tmp; |
1c280471 | 365 | |
b67bfe0d | 366 | hlist_for_each_entry(bat_algo_ops_tmp, &batadv_algo_list, list) { |
1c280471 ML |
367 | if (strcmp(bat_algo_ops_tmp->name, name) != 0) |
368 | continue; | |
369 | ||
370 | bat_algo_ops = bat_algo_ops_tmp; | |
371 | break; | |
372 | } | |
373 | ||
374 | return bat_algo_ops; | |
375 | } | |
376 | ||
56303d34 | 377 | int batadv_algo_register(struct batadv_algo_ops *bat_algo_ops) |
1c280471 | 378 | { |
56303d34 | 379 | struct batadv_algo_ops *bat_algo_ops_tmp; |
5346c35e | 380 | int ret; |
1c280471 | 381 | |
ee11ad61 | 382 | bat_algo_ops_tmp = batadv_algo_get(bat_algo_ops->name); |
1c280471 | 383 | if (bat_algo_ops_tmp) { |
86ceb360 SE |
384 | pr_info("Trying to register already registered routing algorithm: %s\n", |
385 | bat_algo_ops->name); | |
5346c35e | 386 | ret = -EEXIST; |
1c280471 ML |
387 | goto out; |
388 | } | |
389 | ||
01c4224b | 390 | /* all algorithms must implement all ops (for now) */ |
c2aca022 | 391 | if (!bat_algo_ops->bat_iface_enable || |
00a50076 | 392 | !bat_algo_ops->bat_iface_disable || |
c3229398 | 393 | !bat_algo_ops->bat_iface_update_mac || |
cd8b78e7 | 394 | !bat_algo_ops->bat_primary_iface_set || |
01c4224b | 395 | !bat_algo_ops->bat_ogm_schedule || |
c3e29312 | 396 | !bat_algo_ops->bat_ogm_emit) { |
01c4224b ML |
397 | pr_info("Routing algo '%s' does not implement required ops\n", |
398 | bat_algo_ops->name); | |
5346c35e | 399 | ret = -EINVAL; |
01c4224b ML |
400 | goto out; |
401 | } | |
402 | ||
1c280471 | 403 | INIT_HLIST_NODE(&bat_algo_ops->list); |
ee11ad61 | 404 | hlist_add_head(&bat_algo_ops->list, &batadv_algo_list); |
1c280471 ML |
405 | ret = 0; |
406 | ||
407 | out: | |
408 | return ret; | |
409 | } | |
410 | ||
56303d34 | 411 | int batadv_algo_select(struct batadv_priv *bat_priv, char *name) |
1c280471 | 412 | { |
56303d34 | 413 | struct batadv_algo_ops *bat_algo_ops; |
5346c35e | 414 | int ret = -EINVAL; |
1c280471 | 415 | |
ee11ad61 | 416 | bat_algo_ops = batadv_algo_get(name); |
1c280471 ML |
417 | if (!bat_algo_ops) |
418 | goto out; | |
419 | ||
420 | bat_priv->bat_algo_ops = bat_algo_ops; | |
421 | ret = 0; | |
422 | ||
423 | out: | |
424 | return ret; | |
425 | } | |
426 | ||
3193e8fd | 427 | int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) |
1c280471 | 428 | { |
56303d34 | 429 | struct batadv_algo_ops *bat_algo_ops; |
1c280471 | 430 | |
0c814653 | 431 | seq_puts(seq, "Available routing algorithms:\n"); |
1c280471 | 432 | |
b67bfe0d | 433 | hlist_for_each_entry(bat_algo_ops, &batadv_algo_list, list) { |
1c280471 ML |
434 | seq_printf(seq, "%s\n", bat_algo_ops->name); |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
95a066d8 SE |
440 | /** |
441 | * batadv_skb_crc32 - calculate CRC32 of the whole packet and skip bytes in | |
442 | * the header | |
443 | * @skb: skb pointing to fragmented socket buffers | |
444 | * @payload_ptr: Pointer to position inside the head buffer of the skb | |
445 | * marking the start of the data to be CRC'ed | |
446 | * | |
447 | * payload_ptr must always point to an address in the skb head buffer and not to | |
448 | * a fragment. | |
449 | */ | |
450 | __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr) | |
451 | { | |
452 | u32 crc = 0; | |
453 | unsigned int from; | |
454 | unsigned int to = skb->len; | |
455 | struct skb_seq_state st; | |
456 | const u8 *data; | |
457 | unsigned int len; | |
458 | unsigned int consumed = 0; | |
459 | ||
460 | from = (unsigned int)(payload_ptr - skb->data); | |
461 | ||
462 | skb_prepare_seq_read(skb, from, to, &st); | |
463 | while ((len = skb_seq_read(consumed, &data, &st)) != 0) { | |
464 | crc = crc32c(crc, data, len); | |
465 | consumed += len; | |
466 | } | |
467 | skb_abort_seq_read(&st); | |
468 | ||
469 | return htonl(crc); | |
470 | } | |
471 | ||
ee11ad61 | 472 | static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) |
d419be1f | 473 | { |
56303d34 | 474 | struct batadv_algo_ops *bat_algo_ops; |
d8cb5486 ML |
475 | char *algo_name = (char *)val; |
476 | size_t name_len = strlen(algo_name); | |
d419be1f | 477 | |
d8cb5486 ML |
478 | if (algo_name[name_len - 1] == '\n') |
479 | algo_name[name_len - 1] = '\0'; | |
480 | ||
ee11ad61 | 481 | bat_algo_ops = batadv_algo_get(algo_name); |
d419be1f | 482 | if (!bat_algo_ops) { |
d8cb5486 | 483 | pr_err("Routing algorithm '%s' is not supported\n", algo_name); |
d419be1f ML |
484 | return -EINVAL; |
485 | } | |
486 | ||
d8cb5486 | 487 | return param_set_copystring(algo_name, kp); |
d419be1f ML |
488 | } |
489 | ||
ee11ad61 SE |
490 | static const struct kernel_param_ops batadv_param_ops_ra = { |
491 | .set = batadv_param_set_ra, | |
d419be1f ML |
492 | .get = param_get_string, |
493 | }; | |
494 | ||
ee11ad61 | 495 | static struct kparam_string batadv_param_string_ra = { |
3193e8fd SE |
496 | .maxlen = sizeof(batadv_routing_algo), |
497 | .string = batadv_routing_algo, | |
d419be1f ML |
498 | }; |
499 | ||
ee11ad61 SE |
500 | module_param_cb(routing_algo, &batadv_param_ops_ra, &batadv_param_string_ra, |
501 | 0644); | |
502 | module_init(batadv_init); | |
503 | module_exit(batadv_exit); | |
c6c8fea2 SE |
504 | |
505 | MODULE_LICENSE("GPL"); | |
506 | ||
42d0b044 SE |
507 | MODULE_AUTHOR(BATADV_DRIVER_AUTHOR); |
508 | MODULE_DESCRIPTION(BATADV_DRIVER_DESC); | |
509 | MODULE_SUPPORTED_DEVICE(BATADV_DRIVER_DEVICE); | |
510 | MODULE_VERSION(BATADV_SOURCE_VERSION); |