1 /* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors:
3 * Linus Lüssing, Marek Lindner
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.
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.
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/>.
21 #include <linux/atomic.h>
22 #include <linux/bug.h>
23 #include <linux/cache.h>
24 #include <linux/init.h>
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>
30 #include <linux/stddef.h>
31 #include <linux/types.h>
32 #include <linux/workqueue.h>
35 #include "bat_v_elp.h"
36 #include "bat_v_ogm.h"
37 #include "hard-interface.h"
39 #include "originator.h"
42 static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
44 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
45 struct batadv_hard_iface *primary_if;
47 primary_if = batadv_primary_if_get_selected(bat_priv);
50 batadv_v_elp_iface_activate(primary_if, hard_iface);
51 batadv_hardif_put(primary_if);
54 /* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can
55 * set the interface as ACTIVE right away, without any risk of race
58 if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED)
59 hard_iface->if_status = BATADV_IF_ACTIVE;
62 static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
66 ret = batadv_v_elp_iface_enable(hard_iface);
70 ret = batadv_v_ogm_iface_enable(hard_iface);
72 batadv_v_elp_iface_disable(hard_iface);
77 static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
79 batadv_v_elp_iface_disable(hard_iface);
82 static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
84 batadv_v_elp_primary_iface_set(hard_iface);
85 batadv_v_ogm_primary_iface_set(hard_iface);
89 * batadv_v_iface_update_mac - react to hard-interface MAC address change
90 * @hard_iface: the modified interface
92 * If the modified interface is the primary one, update the originator
93 * address in the ELP and OGM messages to reflect the new MAC address.
95 static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
97 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
98 struct batadv_hard_iface *primary_if;
100 primary_if = batadv_primary_if_get_selected(bat_priv);
101 if (primary_if != hard_iface)
104 batadv_v_primary_iface_set(hard_iface);
107 batadv_hardif_put(primary_if);
111 batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
113 ewma_throughput_init(&hardif_neigh->bat_v.throughput);
114 INIT_WORK(&hardif_neigh->bat_v.metric_work,
115 batadv_v_elp_throughput_metric_update);
119 * batadv_v_orig_print_neigh - print neighbors for the originator table
120 * @orig_node: the orig_node for which the neighbors are printed
121 * @if_outgoing: outgoing interface for these entries
122 * @seq: debugfs table seq_file struct
124 * Must be called while holding an rcu lock.
127 batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
128 struct batadv_hard_iface *if_outgoing,
129 struct seq_file *seq)
131 struct batadv_neigh_node *neigh_node;
132 struct batadv_neigh_ifinfo *n_ifinfo;
134 hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
135 n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
139 seq_printf(seq, " %pM (%9u.%1u)",
141 n_ifinfo->bat_v.throughput / 10,
142 n_ifinfo->bat_v.throughput % 10);
144 batadv_neigh_ifinfo_put(n_ifinfo);
149 * batadv_v_hardif_neigh_print - print a single ELP neighbour node
150 * @seq: neighbour table seq_file struct
151 * @hardif_neigh: hardif neighbour information
154 batadv_v_hardif_neigh_print(struct seq_file *seq,
155 struct batadv_hardif_neigh_node *hardif_neigh)
157 int last_secs, last_msecs;
160 last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
161 last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
162 throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
164 seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
165 hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
166 throughput % 10, hardif_neigh->if_incoming->net_dev->name);
170 * batadv_v_neigh_print - print the single hop neighbour list
171 * @bat_priv: the bat priv with all the soft interface information
172 * @seq: neighbour table seq_file struct
174 static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
175 struct seq_file *seq)
177 struct net_device *net_dev = (struct net_device *)seq->private;
178 struct batadv_hardif_neigh_node *hardif_neigh;
179 struct batadv_hard_iface *hard_iface;
180 int batman_count = 0;
183 " Neighbor last-seen ( throughput) [ IF]\n");
186 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
187 if (hard_iface->soft_iface != net_dev)
190 hlist_for_each_entry_rcu(hardif_neigh,
191 &hard_iface->neigh_list, list) {
192 batadv_v_hardif_neigh_print(seq, hardif_neigh);
198 if (batman_count == 0)
199 seq_puts(seq, "No batman nodes in range ...\n");
203 * batadv_v_orig_print - print the originator table
204 * @bat_priv: the bat priv with all the soft interface information
205 * @seq: debugfs table seq_file struct
206 * @if_outgoing: the outgoing interface for which this should be printed
208 static void batadv_v_orig_print(struct batadv_priv *bat_priv,
209 struct seq_file *seq,
210 struct batadv_hard_iface *if_outgoing)
212 struct batadv_neigh_node *neigh_node;
213 struct batadv_hashtable *hash = bat_priv->orig_hash;
214 int last_seen_msecs, last_seen_secs;
215 struct batadv_orig_node *orig_node;
216 struct batadv_neigh_ifinfo *n_ifinfo;
217 unsigned long last_seen_jiffies;
218 struct hlist_head *head;
219 int batman_count = 0;
223 " Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n");
225 for (i = 0; i < hash->size; i++) {
226 head = &hash->table[i];
229 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
230 neigh_node = batadv_orig_router_get(orig_node,
235 n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
240 last_seen_jiffies = jiffies - orig_node->last_seen;
241 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
242 last_seen_secs = last_seen_msecs / 1000;
243 last_seen_msecs = last_seen_msecs % 1000;
245 seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
246 orig_node->orig, last_seen_secs,
248 n_ifinfo->bat_v.throughput / 10,
249 n_ifinfo->bat_v.throughput % 10,
251 neigh_node->if_incoming->net_dev->name);
253 batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
258 batadv_neigh_node_put(neigh_node);
260 batadv_neigh_ifinfo_put(n_ifinfo);
265 if (batman_count == 0)
266 seq_puts(seq, "No batman nodes in range ...\n");
269 static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
270 struct batadv_hard_iface *if_outgoing1,
271 struct batadv_neigh_node *neigh2,
272 struct batadv_hard_iface *if_outgoing2)
274 struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
277 ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
278 if (WARN_ON(!ifinfo1))
281 ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
282 if (WARN_ON(!ifinfo2))
285 ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
287 batadv_neigh_ifinfo_put(ifinfo2);
289 batadv_neigh_ifinfo_put(ifinfo1);
294 static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
295 struct batadv_hard_iface *if_outgoing1,
296 struct batadv_neigh_node *neigh2,
297 struct batadv_hard_iface *if_outgoing2)
299 struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
303 ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
304 if (WARN_ON(!ifinfo1))
307 ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
308 if (WARN_ON(!ifinfo2))
311 threshold = ifinfo1->bat_v.throughput / 4;
312 threshold = ifinfo1->bat_v.throughput - threshold;
314 ret = ifinfo2->bat_v.throughput > threshold;
316 batadv_neigh_ifinfo_put(ifinfo2);
318 batadv_neigh_ifinfo_put(ifinfo1);
323 static struct batadv_algo_ops batadv_batman_v __read_mostly = {
326 .activate = batadv_v_iface_activate,
327 .enable = batadv_v_iface_enable,
328 .disable = batadv_v_iface_disable,
329 .update_mac = batadv_v_iface_update_mac,
330 .primary_set = batadv_v_primary_iface_set,
333 .hardif_init = batadv_v_hardif_neigh_init,
334 .cmp = batadv_v_neigh_cmp,
335 .is_similar_or_better = batadv_v_neigh_is_sob,
336 .print = batadv_v_neigh_print,
339 .print = batadv_v_orig_print,
344 * batadv_v_hardif_init - initialize the algorithm specific fields in the
345 * hard-interface object
346 * @hard_iface: the hard-interface to initialize
348 void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface)
350 /* enable link throughput auto-detection by setting the throughput
353 atomic_set(&hard_iface->bat_v.throughput_override, 0);
354 atomic_set(&hard_iface->bat_v.elp_interval, 500);
358 * batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a
360 * @bat_priv: the object representing the mesh interface to initialise
362 * Return: 0 on success or a negative error code otherwise
364 int batadv_v_mesh_init(struct batadv_priv *bat_priv)
366 return batadv_v_ogm_init(bat_priv);
370 * batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh
371 * @bat_priv: the object representing the mesh interface to free
373 void batadv_v_mesh_free(struct batadv_priv *bat_priv)
375 batadv_v_ogm_free(bat_priv);
379 * batadv_v_init - B.A.T.M.A.N. V initialization function
381 * Description: Takes care of initializing all the subcomponents.
382 * It is invoked upon module load only.
384 * Return: 0 on success or a negative error code otherwise
386 int __init batadv_v_init(void)
390 /* B.A.T.M.A.N. V echo location protocol packet */
391 ret = batadv_recv_handler_register(BATADV_ELP,
392 batadv_v_elp_packet_recv);
396 ret = batadv_recv_handler_register(BATADV_OGM2,
397 batadv_v_ogm_packet_recv);
401 ret = batadv_algo_register(&batadv_batman_v);
408 batadv_recv_handler_unregister(BATADV_OGM2);
411 batadv_recv_handler_unregister(BATADV_ELP);