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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" |
261e264d | 35 | #include "hash.h" |
97869060 | 36 | #include "originator.h" |
162bd64c | 37 | #include "packet.h" |
d6f94d91 LL |
38 | |
39 | static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface) | |
40 | { | |
0da00359 AQ |
41 | int ret; |
42 | ||
43 | ret = batadv_v_elp_iface_enable(hard_iface); | |
44 | if (ret < 0) | |
45 | return ret; | |
46 | ||
47 | ret = batadv_v_ogm_iface_enable(hard_iface); | |
48 | if (ret < 0) | |
49 | batadv_v_elp_iface_disable(hard_iface); | |
50 | ||
0b5ecc68 AQ |
51 | /* enable link throughput auto-detection by setting the throughput |
52 | * override to zero | |
53 | */ | |
54 | atomic_set(&hard_iface->bat_v.throughput_override, 0); | |
55 | ||
0da00359 | 56 | return ret; |
d6f94d91 LL |
57 | } |
58 | ||
59 | static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface) | |
60 | { | |
61 | batadv_v_elp_iface_disable(hard_iface); | |
62 | } | |
63 | ||
64 | static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface) | |
65 | { | |
66 | } | |
67 | ||
68 | static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
69 | { | |
70 | batadv_v_elp_primary_iface_set(hard_iface); | |
0da00359 | 71 | batadv_v_ogm_primary_iface_set(hard_iface); |
d6f94d91 LL |
72 | } |
73 | ||
162bd64c LL |
74 | static void |
75 | batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh) | |
76 | { | |
77 | ewma_throughput_init(&hardif_neigh->bat_v.throughput); | |
c833484e AQ |
78 | INIT_WORK(&hardif_neigh->bat_v.metric_work, |
79 | batadv_v_elp_throughput_metric_update); | |
162bd64c LL |
80 | } |
81 | ||
d6f94d91 LL |
82 | static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface) |
83 | { | |
84 | } | |
85 | ||
86 | static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet) | |
87 | { | |
88 | } | |
89 | ||
261e264d AQ |
90 | /** |
91 | * batadv_v_orig_print_neigh - print neighbors for the originator table | |
92 | * @orig_node: the orig_node for which the neighbors are printed | |
93 | * @if_outgoing: outgoing interface for these entries | |
94 | * @seq: debugfs table seq_file struct | |
95 | * | |
96 | * Must be called while holding an rcu lock. | |
97 | */ | |
98 | static void | |
99 | batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node, | |
100 | struct batadv_hard_iface *if_outgoing, | |
101 | struct seq_file *seq) | |
102 | { | |
103 | struct batadv_neigh_node *neigh_node; | |
104 | struct batadv_neigh_ifinfo *n_ifinfo; | |
105 | ||
106 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
107 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
108 | if (!n_ifinfo) | |
109 | continue; | |
110 | ||
111 | seq_printf(seq, " %pM (%9u.%1u)", | |
112 | neigh_node->addr, | |
113 | n_ifinfo->bat_v.throughput / 10, | |
114 | n_ifinfo->bat_v.throughput % 10); | |
115 | ||
116 | batadv_neigh_ifinfo_put(n_ifinfo); | |
117 | } | |
118 | } | |
119 | ||
626d23e8 LL |
120 | /** |
121 | * batadv_v_hardif_neigh_print - print a single ELP neighbour node | |
122 | * @seq: neighbour table seq_file struct | |
123 | * @hardif_neigh: hardif neighbour information | |
124 | */ | |
125 | static void | |
126 | batadv_v_hardif_neigh_print(struct seq_file *seq, | |
127 | struct batadv_hardif_neigh_node *hardif_neigh) | |
128 | { | |
129 | int last_secs, last_msecs; | |
130 | u32 throughput; | |
131 | ||
132 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
133 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
134 | throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput); | |
135 | ||
136 | seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n", | |
137 | hardif_neigh->addr, last_secs, last_msecs, throughput / 10, | |
138 | throughput % 10, hardif_neigh->if_incoming->net_dev->name); | |
139 | } | |
140 | ||
141 | /** | |
142 | * batadv_v_neigh_print - print the single hop neighbour list | |
143 | * @bat_priv: the bat priv with all the soft interface information | |
144 | * @seq: neighbour table seq_file struct | |
145 | */ | |
146 | static void batadv_v_neigh_print(struct batadv_priv *bat_priv, | |
147 | struct seq_file *seq) | |
148 | { | |
149 | struct net_device *net_dev = (struct net_device *)seq->private; | |
150 | struct batadv_hardif_neigh_node *hardif_neigh; | |
151 | struct batadv_hard_iface *hard_iface; | |
152 | int batman_count = 0; | |
153 | ||
154 | seq_printf(seq, " %-15s %s (%11s) [%10s]\n", "Neighbor", | |
155 | "last-seen", "throughput", "IF"); | |
156 | ||
157 | rcu_read_lock(); | |
158 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
159 | if (hard_iface->soft_iface != net_dev) | |
160 | continue; | |
161 | ||
162 | hlist_for_each_entry_rcu(hardif_neigh, | |
163 | &hard_iface->neigh_list, list) { | |
164 | batadv_v_hardif_neigh_print(seq, hardif_neigh); | |
165 | batman_count++; | |
166 | } | |
167 | } | |
168 | rcu_read_unlock(); | |
169 | ||
170 | if (batman_count == 0) | |
171 | seq_puts(seq, "No batman nodes in range ...\n"); | |
172 | } | |
173 | ||
261e264d AQ |
174 | /** |
175 | * batadv_v_orig_print - print the originator table | |
176 | * @bat_priv: the bat priv with all the soft interface information | |
177 | * @seq: debugfs table seq_file struct | |
178 | * @if_outgoing: the outgoing interface for which this should be printed | |
179 | */ | |
180 | static void batadv_v_orig_print(struct batadv_priv *bat_priv, | |
181 | struct seq_file *seq, | |
182 | struct batadv_hard_iface *if_outgoing) | |
183 | { | |
184 | struct batadv_neigh_node *neigh_node; | |
185 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
186 | int last_seen_msecs, last_seen_secs; | |
187 | struct batadv_orig_node *orig_node; | |
188 | struct batadv_neigh_ifinfo *n_ifinfo; | |
189 | unsigned long last_seen_jiffies; | |
190 | struct hlist_head *head; | |
191 | int batman_count = 0; | |
192 | u32 i; | |
193 | ||
194 | seq_printf(seq, " %-15s %s (%11s) %17s [%10s]: %20s ...\n", | |
195 | "Originator", "last-seen", "throughput", "Nexthop", | |
196 | "outgoingIF", "Potential nexthops"); | |
197 | ||
198 | for (i = 0; i < hash->size; i++) { | |
199 | head = &hash->table[i]; | |
200 | ||
201 | rcu_read_lock(); | |
202 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
203 | neigh_node = batadv_orig_router_get(orig_node, | |
204 | if_outgoing); | |
205 | if (!neigh_node) | |
206 | continue; | |
207 | ||
208 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, | |
209 | if_outgoing); | |
210 | if (!n_ifinfo) | |
211 | goto next; | |
212 | ||
213 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
214 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
215 | last_seen_secs = last_seen_msecs / 1000; | |
216 | last_seen_msecs = last_seen_msecs % 1000; | |
217 | ||
218 | seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:", | |
219 | orig_node->orig, last_seen_secs, | |
220 | last_seen_msecs, | |
221 | n_ifinfo->bat_v.throughput / 10, | |
222 | n_ifinfo->bat_v.throughput % 10, | |
223 | neigh_node->addr, | |
224 | neigh_node->if_incoming->net_dev->name); | |
225 | ||
226 | batadv_v_orig_print_neigh(orig_node, if_outgoing, seq); | |
227 | seq_puts(seq, "\n"); | |
228 | batman_count++; | |
229 | ||
230 | next: | |
231 | batadv_neigh_node_put(neigh_node); | |
232 | if (n_ifinfo) | |
233 | batadv_neigh_ifinfo_put(n_ifinfo); | |
234 | } | |
235 | rcu_read_unlock(); | |
236 | } | |
237 | ||
238 | if (batman_count == 0) | |
239 | seq_puts(seq, "No batman nodes in range ...\n"); | |
240 | } | |
241 | ||
97869060 AQ |
242 | static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1, |
243 | struct batadv_hard_iface *if_outgoing1, | |
244 | struct batadv_neigh_node *neigh2, | |
245 | struct batadv_hard_iface *if_outgoing2) | |
246 | { | |
247 | struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; | |
248 | ||
249 | ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
250 | ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
251 | ||
252 | if (WARN_ON(!ifinfo1 || !ifinfo2)) | |
253 | return 0; | |
254 | ||
255 | return ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput; | |
256 | } | |
257 | ||
258 | static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1, | |
259 | struct batadv_hard_iface *if_outgoing1, | |
260 | struct batadv_neigh_node *neigh2, | |
261 | struct batadv_hard_iface *if_outgoing2) | |
262 | { | |
263 | struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; | |
264 | u32 threshold; | |
265 | ||
266 | ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
267 | ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
268 | ||
269 | threshold = ifinfo1->bat_v.throughput / 4; | |
270 | threshold = ifinfo1->bat_v.throughput - threshold; | |
271 | ||
272 | return ifinfo2->bat_v.throughput > threshold; | |
273 | } | |
274 | ||
d6f94d91 LL |
275 | static struct batadv_algo_ops batadv_batman_v __read_mostly = { |
276 | .name = "BATMAN_V", | |
277 | .bat_iface_enable = batadv_v_iface_enable, | |
278 | .bat_iface_disable = batadv_v_iface_disable, | |
279 | .bat_iface_update_mac = batadv_v_iface_update_mac, | |
280 | .bat_primary_iface_set = batadv_v_primary_iface_set, | |
162bd64c | 281 | .bat_hardif_neigh_init = batadv_v_hardif_neigh_init, |
d6f94d91 LL |
282 | .bat_ogm_emit = batadv_v_ogm_emit, |
283 | .bat_ogm_schedule = batadv_v_ogm_schedule, | |
261e264d | 284 | .bat_orig_print = batadv_v_orig_print, |
97869060 AQ |
285 | .bat_neigh_cmp = batadv_v_neigh_cmp, |
286 | .bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob, | |
626d23e8 | 287 | .bat_neigh_print = batadv_v_neigh_print, |
d6f94d91 LL |
288 | }; |
289 | ||
0da00359 AQ |
290 | /** |
291 | * batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a | |
292 | * mesh | |
293 | * @bat_priv: the object representing the mesh interface to initialise | |
294 | * | |
295 | * Return: 0 on success or a negative error code otherwise | |
296 | */ | |
297 | int batadv_v_mesh_init(struct batadv_priv *bat_priv) | |
298 | { | |
299 | return batadv_v_ogm_init(bat_priv); | |
300 | } | |
301 | ||
302 | /** | |
303 | * batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh | |
304 | * @bat_priv: the object representing the mesh interface to free | |
305 | */ | |
306 | void batadv_v_mesh_free(struct batadv_priv *bat_priv) | |
307 | { | |
308 | batadv_v_ogm_free(bat_priv); | |
309 | } | |
310 | ||
d6f94d91 LL |
311 | /** |
312 | * batadv_v_init - B.A.T.M.A.N. V initialization function | |
313 | * | |
314 | * Description: Takes care of initializing all the subcomponents. | |
315 | * It is invoked upon module load only. | |
316 | * | |
317 | * Return: 0 on success or a negative error code otherwise | |
318 | */ | |
319 | int __init batadv_v_init(void) | |
320 | { | |
162bd64c LL |
321 | int ret; |
322 | ||
323 | /* B.A.T.M.A.N. V echo location protocol packet */ | |
324 | ret = batadv_recv_handler_register(BATADV_ELP, | |
325 | batadv_v_elp_packet_recv); | |
326 | if (ret < 0) | |
327 | return ret; | |
328 | ||
0da00359 AQ |
329 | ret = batadv_recv_handler_register(BATADV_OGM2, |
330 | batadv_v_ogm_packet_recv); | |
331 | if (ret < 0) | |
332 | goto elp_unregister; | |
162bd64c | 333 | |
0da00359 | 334 | ret = batadv_algo_register(&batadv_batman_v); |
162bd64c | 335 | if (ret < 0) |
0da00359 AQ |
336 | goto ogm_unregister; |
337 | ||
338 | return ret; | |
339 | ||
340 | ogm_unregister: | |
341 | batadv_recv_handler_unregister(BATADV_OGM2); | |
342 | ||
343 | elp_unregister: | |
344 | batadv_recv_handler_unregister(BATADV_ELP); | |
162bd64c LL |
345 | |
346 | return ret; | |
d6f94d91 | 347 | } |