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d6f94d91 LL |
1 | /* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors: |
2 | * | |
3 | * Linus Lüssing, Marek Lindner | |
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, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include "bat_algo.h" | |
19 | #include "main.h" | |
20 | ||
0b5ecc68 | 21 | #include <linux/atomic.h> |
97869060 | 22 | #include <linux/bug.h> |
d6f94d91 LL |
23 | #include <linux/cache.h> |
24 | #include <linux/init.h> | |
261e264d AQ |
25 | #include <linux/jiffies.h> |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/rculist.h> | |
28 | #include <linux/rcupdate.h> | |
29 | #include <linux/seq_file.h> | |
97869060 | 30 | #include <linux/types.h> |
c833484e | 31 | #include <linux/workqueue.h> |
d6f94d91 LL |
32 | |
33 | #include "bat_v_elp.h" | |
0da00359 | 34 | #include "bat_v_ogm.h" |
b6cf5d49 | 35 | #include "hard-interface.h" |
261e264d | 36 | #include "hash.h" |
97869060 | 37 | #include "originator.h" |
162bd64c | 38 | #include "packet.h" |
d6f94d91 | 39 | |
b6cf5d49 AQ |
40 | static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface) |
41 | { | |
42 | /* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can | |
43 | * set the interface as ACTIVE right away, without any risk of race | |
44 | * condition | |
45 | */ | |
46 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) | |
47 | hard_iface->if_status = BATADV_IF_ACTIVE; | |
48 | } | |
49 | ||
d6f94d91 LL |
50 | static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface) |
51 | { | |
0da00359 AQ |
52 | int ret; |
53 | ||
54 | ret = batadv_v_elp_iface_enable(hard_iface); | |
55 | if (ret < 0) | |
56 | return ret; | |
57 | ||
58 | ret = batadv_v_ogm_iface_enable(hard_iface); | |
59 | if (ret < 0) | |
60 | batadv_v_elp_iface_disable(hard_iface); | |
61 | ||
0b5ecc68 AQ |
62 | /* enable link throughput auto-detection by setting the throughput |
63 | * override to zero | |
64 | */ | |
65 | atomic_set(&hard_iface->bat_v.throughput_override, 0); | |
66 | ||
0da00359 | 67 | return ret; |
d6f94d91 LL |
68 | } |
69 | ||
70 | static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface) | |
71 | { | |
72 | batadv_v_elp_iface_disable(hard_iface); | |
73 | } | |
74 | ||
75 | static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface) | |
76 | { | |
77 | } | |
78 | ||
79 | static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
80 | { | |
81 | batadv_v_elp_primary_iface_set(hard_iface); | |
0da00359 | 82 | batadv_v_ogm_primary_iface_set(hard_iface); |
d6f94d91 LL |
83 | } |
84 | ||
162bd64c LL |
85 | static void |
86 | batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh) | |
87 | { | |
88 | ewma_throughput_init(&hardif_neigh->bat_v.throughput); | |
c833484e AQ |
89 | INIT_WORK(&hardif_neigh->bat_v.metric_work, |
90 | batadv_v_elp_throughput_metric_update); | |
162bd64c LL |
91 | } |
92 | ||
d6f94d91 LL |
93 | static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface) |
94 | { | |
95 | } | |
96 | ||
97 | static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet) | |
98 | { | |
99 | } | |
100 | ||
261e264d AQ |
101 | /** |
102 | * batadv_v_orig_print_neigh - print neighbors for the originator table | |
103 | * @orig_node: the orig_node for which the neighbors are printed | |
104 | * @if_outgoing: outgoing interface for these entries | |
105 | * @seq: debugfs table seq_file struct | |
106 | * | |
107 | * Must be called while holding an rcu lock. | |
108 | */ | |
109 | static void | |
110 | batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node, | |
111 | struct batadv_hard_iface *if_outgoing, | |
112 | struct seq_file *seq) | |
113 | { | |
114 | struct batadv_neigh_node *neigh_node; | |
115 | struct batadv_neigh_ifinfo *n_ifinfo; | |
116 | ||
117 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
118 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
119 | if (!n_ifinfo) | |
120 | continue; | |
121 | ||
122 | seq_printf(seq, " %pM (%9u.%1u)", | |
123 | neigh_node->addr, | |
124 | n_ifinfo->bat_v.throughput / 10, | |
125 | n_ifinfo->bat_v.throughput % 10); | |
126 | ||
127 | batadv_neigh_ifinfo_put(n_ifinfo); | |
128 | } | |
129 | } | |
130 | ||
626d23e8 LL |
131 | /** |
132 | * batadv_v_hardif_neigh_print - print a single ELP neighbour node | |
133 | * @seq: neighbour table seq_file struct | |
134 | * @hardif_neigh: hardif neighbour information | |
135 | */ | |
136 | static void | |
137 | batadv_v_hardif_neigh_print(struct seq_file *seq, | |
138 | struct batadv_hardif_neigh_node *hardif_neigh) | |
139 | { | |
140 | int last_secs, last_msecs; | |
141 | u32 throughput; | |
142 | ||
143 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
144 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
145 | throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput); | |
146 | ||
147 | seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n", | |
148 | hardif_neigh->addr, last_secs, last_msecs, throughput / 10, | |
149 | throughput % 10, hardif_neigh->if_incoming->net_dev->name); | |
150 | } | |
151 | ||
152 | /** | |
153 | * batadv_v_neigh_print - print the single hop neighbour list | |
154 | * @bat_priv: the bat priv with all the soft interface information | |
155 | * @seq: neighbour table seq_file struct | |
156 | */ | |
157 | static void batadv_v_neigh_print(struct batadv_priv *bat_priv, | |
158 | struct seq_file *seq) | |
159 | { | |
160 | struct net_device *net_dev = (struct net_device *)seq->private; | |
161 | struct batadv_hardif_neigh_node *hardif_neigh; | |
162 | struct batadv_hard_iface *hard_iface; | |
163 | int batman_count = 0; | |
164 | ||
925a6f37 AQ |
165 | seq_puts(seq, |
166 | " Neighbor last-seen ( throughput) [ IF]\n"); | |
626d23e8 LL |
167 | |
168 | rcu_read_lock(); | |
169 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
170 | if (hard_iface->soft_iface != net_dev) | |
171 | continue; | |
172 | ||
173 | hlist_for_each_entry_rcu(hardif_neigh, | |
174 | &hard_iface->neigh_list, list) { | |
175 | batadv_v_hardif_neigh_print(seq, hardif_neigh); | |
176 | batman_count++; | |
177 | } | |
178 | } | |
179 | rcu_read_unlock(); | |
180 | ||
181 | if (batman_count == 0) | |
182 | seq_puts(seq, "No batman nodes in range ...\n"); | |
183 | } | |
184 | ||
261e264d AQ |
185 | /** |
186 | * batadv_v_orig_print - print the originator table | |
187 | * @bat_priv: the bat priv with all the soft interface information | |
188 | * @seq: debugfs table seq_file struct | |
189 | * @if_outgoing: the outgoing interface for which this should be printed | |
190 | */ | |
191 | static void batadv_v_orig_print(struct batadv_priv *bat_priv, | |
192 | struct seq_file *seq, | |
193 | struct batadv_hard_iface *if_outgoing) | |
194 | { | |
195 | struct batadv_neigh_node *neigh_node; | |
196 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
197 | int last_seen_msecs, last_seen_secs; | |
198 | struct batadv_orig_node *orig_node; | |
199 | struct batadv_neigh_ifinfo *n_ifinfo; | |
200 | unsigned long last_seen_jiffies; | |
201 | struct hlist_head *head; | |
202 | int batman_count = 0; | |
203 | u32 i; | |
204 | ||
925a6f37 AQ |
205 | seq_puts(seq, |
206 | " Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n"); | |
261e264d AQ |
207 | |
208 | for (i = 0; i < hash->size; i++) { | |
209 | head = &hash->table[i]; | |
210 | ||
211 | rcu_read_lock(); | |
212 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
213 | neigh_node = batadv_orig_router_get(orig_node, | |
214 | if_outgoing); | |
215 | if (!neigh_node) | |
216 | continue; | |
217 | ||
218 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, | |
219 | if_outgoing); | |
220 | if (!n_ifinfo) | |
221 | goto next; | |
222 | ||
223 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
224 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
225 | last_seen_secs = last_seen_msecs / 1000; | |
226 | last_seen_msecs = last_seen_msecs % 1000; | |
227 | ||
228 | seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:", | |
229 | orig_node->orig, last_seen_secs, | |
230 | last_seen_msecs, | |
231 | n_ifinfo->bat_v.throughput / 10, | |
232 | n_ifinfo->bat_v.throughput % 10, | |
233 | neigh_node->addr, | |
234 | neigh_node->if_incoming->net_dev->name); | |
235 | ||
236 | batadv_v_orig_print_neigh(orig_node, if_outgoing, seq); | |
237 | seq_puts(seq, "\n"); | |
238 | batman_count++; | |
239 | ||
240 | next: | |
241 | batadv_neigh_node_put(neigh_node); | |
242 | if (n_ifinfo) | |
243 | batadv_neigh_ifinfo_put(n_ifinfo); | |
244 | } | |
245 | rcu_read_unlock(); | |
246 | } | |
247 | ||
248 | if (batman_count == 0) | |
249 | seq_puts(seq, "No batman nodes in range ...\n"); | |
250 | } | |
251 | ||
97869060 AQ |
252 | static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1, |
253 | struct batadv_hard_iface *if_outgoing1, | |
254 | struct batadv_neigh_node *neigh2, | |
255 | struct batadv_hard_iface *if_outgoing2) | |
256 | { | |
257 | struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; | |
258 | ||
259 | ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
260 | ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
261 | ||
262 | if (WARN_ON(!ifinfo1 || !ifinfo2)) | |
263 | return 0; | |
264 | ||
265 | return ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput; | |
266 | } | |
267 | ||
268 | static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1, | |
269 | struct batadv_hard_iface *if_outgoing1, | |
270 | struct batadv_neigh_node *neigh2, | |
271 | struct batadv_hard_iface *if_outgoing2) | |
272 | { | |
273 | struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; | |
274 | u32 threshold; | |
275 | ||
276 | ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
277 | ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
278 | ||
279 | threshold = ifinfo1->bat_v.throughput / 4; | |
280 | threshold = ifinfo1->bat_v.throughput - threshold; | |
281 | ||
282 | return ifinfo2->bat_v.throughput > threshold; | |
283 | } | |
284 | ||
d6f94d91 LL |
285 | static struct batadv_algo_ops batadv_batman_v __read_mostly = { |
286 | .name = "BATMAN_V", | |
b6cf5d49 | 287 | .bat_iface_activate = batadv_v_iface_activate, |
d6f94d91 LL |
288 | .bat_iface_enable = batadv_v_iface_enable, |
289 | .bat_iface_disable = batadv_v_iface_disable, | |
290 | .bat_iface_update_mac = batadv_v_iface_update_mac, | |
291 | .bat_primary_iface_set = batadv_v_primary_iface_set, | |
162bd64c | 292 | .bat_hardif_neigh_init = batadv_v_hardif_neigh_init, |
d6f94d91 LL |
293 | .bat_ogm_emit = batadv_v_ogm_emit, |
294 | .bat_ogm_schedule = batadv_v_ogm_schedule, | |
261e264d | 295 | .bat_orig_print = batadv_v_orig_print, |
97869060 AQ |
296 | .bat_neigh_cmp = batadv_v_neigh_cmp, |
297 | .bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob, | |
626d23e8 | 298 | .bat_neigh_print = batadv_v_neigh_print, |
d6f94d91 LL |
299 | }; |
300 | ||
0da00359 AQ |
301 | /** |
302 | * batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a | |
303 | * mesh | |
304 | * @bat_priv: the object representing the mesh interface to initialise | |
305 | * | |
306 | * Return: 0 on success or a negative error code otherwise | |
307 | */ | |
308 | int batadv_v_mesh_init(struct batadv_priv *bat_priv) | |
309 | { | |
310 | return batadv_v_ogm_init(bat_priv); | |
311 | } | |
312 | ||
313 | /** | |
314 | * batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh | |
315 | * @bat_priv: the object representing the mesh interface to free | |
316 | */ | |
317 | void batadv_v_mesh_free(struct batadv_priv *bat_priv) | |
318 | { | |
319 | batadv_v_ogm_free(bat_priv); | |
320 | } | |
321 | ||
d6f94d91 LL |
322 | /** |
323 | * batadv_v_init - B.A.T.M.A.N. V initialization function | |
324 | * | |
325 | * Description: Takes care of initializing all the subcomponents. | |
326 | * It is invoked upon module load only. | |
327 | * | |
328 | * Return: 0 on success or a negative error code otherwise | |
329 | */ | |
330 | int __init batadv_v_init(void) | |
331 | { | |
162bd64c LL |
332 | int ret; |
333 | ||
334 | /* B.A.T.M.A.N. V echo location protocol packet */ | |
335 | ret = batadv_recv_handler_register(BATADV_ELP, | |
336 | batadv_v_elp_packet_recv); | |
337 | if (ret < 0) | |
338 | return ret; | |
339 | ||
0da00359 AQ |
340 | ret = batadv_recv_handler_register(BATADV_OGM2, |
341 | batadv_v_ogm_packet_recv); | |
342 | if (ret < 0) | |
343 | goto elp_unregister; | |
162bd64c | 344 | |
0da00359 | 345 | ret = batadv_algo_register(&batadv_batman_v); |
162bd64c | 346 | if (ret < 0) |
0da00359 AQ |
347 | goto ogm_unregister; |
348 | ||
349 | return ret; | |
350 | ||
351 | ogm_unregister: | |
352 | batadv_recv_handler_unregister(BATADV_OGM2); | |
353 | ||
354 | elp_unregister: | |
355 | batadv_recv_handler_unregister(BATADV_ELP); | |
162bd64c LL |
356 | |
357 | return ret; | |
d6f94d91 | 358 | } |