1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2013-2019 B.A.T.M.A.N. contributors:
4 * Linus Lüssing, Marek Lindner
10 #include <linux/atomic.h>
11 #include <linux/cache.h>
12 #include <linux/errno.h>
13 #include <linux/if_ether.h>
14 #include <linux/init.h>
15 #include <linux/jiffies.h>
16 #include <linux/kernel.h>
17 #include <linux/kref.h>
18 #include <linux/list.h>
19 #include <linux/netdevice.h>
20 #include <linux/netlink.h>
21 #include <linux/rculist.h>
22 #include <linux/rcupdate.h>
23 #include <linux/seq_file.h>
24 #include <linux/skbuff.h>
25 #include <linux/spinlock.h>
26 #include <linux/stddef.h>
27 #include <linux/types.h>
28 #include <linux/workqueue.h>
29 #include <net/genetlink.h>
30 #include <net/netlink.h>
31 #include <uapi/linux/batadv_packet.h>
32 #include <uapi/linux/batman_adv.h>
35 #include "bat_v_elp.h"
36 #include "bat_v_ogm.h"
37 #include "gateway_client.h"
38 #include "gateway_common.h"
39 #include "hard-interface.h"
43 #include "originator.h"
45 static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface)
47 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
48 struct batadv_hard_iface *primary_if;
50 primary_if = batadv_primary_if_get_selected(bat_priv);
53 batadv_v_elp_iface_activate(primary_if, hard_iface);
54 batadv_hardif_put(primary_if);
57 /* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can
58 * set the interface as ACTIVE right away, without any risk of race
61 if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED)
62 hard_iface->if_status = BATADV_IF_ACTIVE;
65 static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface)
69 ret = batadv_v_elp_iface_enable(hard_iface);
73 ret = batadv_v_ogm_iface_enable(hard_iface);
75 batadv_v_elp_iface_disable(hard_iface);
80 static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface)
82 batadv_v_ogm_iface_disable(hard_iface);
83 batadv_v_elp_iface_disable(hard_iface);
86 static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface)
88 batadv_v_elp_primary_iface_set(hard_iface);
89 batadv_v_ogm_primary_iface_set(hard_iface);
93 * batadv_v_iface_update_mac() - react to hard-interface MAC address change
94 * @hard_iface: the modified interface
96 * If the modified interface is the primary one, update the originator
97 * address in the ELP and OGM messages to reflect the new MAC address.
99 static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface)
101 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
102 struct batadv_hard_iface *primary_if;
104 primary_if = batadv_primary_if_get_selected(bat_priv);
105 if (primary_if != hard_iface)
108 batadv_v_primary_iface_set(hard_iface);
111 batadv_hardif_put(primary_if);
115 batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh)
117 ewma_throughput_init(&hardif_neigh->bat_v.throughput);
118 INIT_WORK(&hardif_neigh->bat_v.metric_work,
119 batadv_v_elp_throughput_metric_update);
122 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
124 * batadv_v_orig_print_neigh() - print neighbors for the originator table
125 * @orig_node: the orig_node for which the neighbors are printed
126 * @if_outgoing: outgoing interface for these entries
127 * @seq: debugfs table seq_file struct
129 * Must be called while holding an rcu lock.
132 batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node,
133 struct batadv_hard_iface *if_outgoing,
134 struct seq_file *seq)
136 struct batadv_neigh_node *neigh_node;
137 struct batadv_neigh_ifinfo *n_ifinfo;
139 hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
140 n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
144 seq_printf(seq, " %pM (%9u.%1u)",
146 n_ifinfo->bat_v.throughput / 10,
147 n_ifinfo->bat_v.throughput % 10);
149 batadv_neigh_ifinfo_put(n_ifinfo);
154 * batadv_v_hardif_neigh_print() - print a single ELP neighbour node
155 * @seq: neighbour table seq_file struct
156 * @hardif_neigh: hardif neighbour information
159 batadv_v_hardif_neigh_print(struct seq_file *seq,
160 struct batadv_hardif_neigh_node *hardif_neigh)
162 int last_secs, last_msecs;
165 last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000;
166 last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000;
167 throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
169 seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n",
170 hardif_neigh->addr, last_secs, last_msecs, throughput / 10,
171 throughput % 10, hardif_neigh->if_incoming->net_dev->name);
175 * batadv_v_neigh_print() - print the single hop neighbour list
176 * @bat_priv: the bat priv with all the soft interface information
177 * @seq: neighbour table seq_file struct
179 static void batadv_v_neigh_print(struct batadv_priv *bat_priv,
180 struct seq_file *seq)
182 struct net_device *net_dev = (struct net_device *)seq->private;
183 struct batadv_hardif_neigh_node *hardif_neigh;
184 struct batadv_hard_iface *hard_iface;
185 int batman_count = 0;
188 " Neighbor last-seen ( throughput) [ IF]\n");
191 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
192 if (hard_iface->soft_iface != net_dev)
195 hlist_for_each_entry_rcu(hardif_neigh,
196 &hard_iface->neigh_list, list) {
197 batadv_v_hardif_neigh_print(seq, hardif_neigh);
203 if (batman_count == 0)
204 seq_puts(seq, "No batman nodes in range ...\n");
209 * batadv_v_neigh_dump_neigh() - Dump a neighbour into a message
210 * @msg: Netlink message to dump into
211 * @portid: Port making netlink request
212 * @seq: Sequence number of netlink message
213 * @hardif_neigh: Neighbour to dump
215 * Return: Error code, or 0 on success
218 batadv_v_neigh_dump_neigh(struct sk_buff *msg, u32 portid, u32 seq,
219 struct batadv_hardif_neigh_node *hardif_neigh)
222 unsigned int last_seen_msecs;
225 last_seen_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen);
226 throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput);
227 throughput = throughput * 100;
229 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
230 BATADV_CMD_GET_NEIGHBORS);
234 if (nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
235 hardif_neigh->addr) ||
236 nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
237 hardif_neigh->if_incoming->net_dev->ifindex) ||
238 nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
240 nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput))
241 goto nla_put_failure;
243 genlmsg_end(msg, hdr);
247 genlmsg_cancel(msg, hdr);
252 * batadv_v_neigh_dump_hardif() - Dump the neighbours of a hard interface into
254 * @msg: Netlink message to dump into
255 * @portid: Port making netlink request
256 * @seq: Sequence number of netlink message
257 * @bat_priv: The bat priv with all the soft interface information
258 * @hard_iface: The hard interface to be dumped
259 * @idx_s: Entries to be skipped
261 * This function assumes the caller holds rcu_read_lock().
263 * Return: Error code, or 0 on success
266 batadv_v_neigh_dump_hardif(struct sk_buff *msg, u32 portid, u32 seq,
267 struct batadv_priv *bat_priv,
268 struct batadv_hard_iface *hard_iface,
271 struct batadv_hardif_neigh_node *hardif_neigh;
274 hlist_for_each_entry_rcu(hardif_neigh,
275 &hard_iface->neigh_list, list) {
279 if (batadv_v_neigh_dump_neigh(msg, portid, seq, hardif_neigh)) {
290 * batadv_v_neigh_dump() - Dump the neighbours of a hard interface into a
292 * @msg: Netlink message to dump into
293 * @cb: Control block containing additional options
294 * @bat_priv: The bat priv with all the soft interface information
295 * @single_hardif: Limit dumping to this hard interface
298 batadv_v_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb,
299 struct batadv_priv *bat_priv,
300 struct batadv_hard_iface *single_hardif)
302 struct batadv_hard_iface *hard_iface;
304 int i_hardif_s = cb->args[0];
305 int idx = cb->args[1];
306 int portid = NETLINK_CB(cb->skb).portid;
310 if (i_hardif_s == 0) {
311 if (batadv_v_neigh_dump_hardif(msg, portid,
313 bat_priv, single_hardif,
318 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
319 if (hard_iface->soft_iface != bat_priv->soft_iface)
322 if (i_hardif++ < i_hardif_s)
325 if (batadv_v_neigh_dump_hardif(msg, portid,
327 bat_priv, hard_iface,
336 cb->args[0] = i_hardif;
340 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
342 * batadv_v_orig_print() - print the originator table
343 * @bat_priv: the bat priv with all the soft interface information
344 * @seq: debugfs table seq_file struct
345 * @if_outgoing: the outgoing interface for which this should be printed
347 static void batadv_v_orig_print(struct batadv_priv *bat_priv,
348 struct seq_file *seq,
349 struct batadv_hard_iface *if_outgoing)
351 struct batadv_neigh_node *neigh_node;
352 struct batadv_hashtable *hash = bat_priv->orig_hash;
353 int last_seen_msecs, last_seen_secs;
354 struct batadv_orig_node *orig_node;
355 struct batadv_neigh_ifinfo *n_ifinfo;
356 unsigned long last_seen_jiffies;
357 struct hlist_head *head;
358 int batman_count = 0;
362 " Originator last-seen ( throughput) Nexthop [outgoingIF]: Potential nexthops ...\n");
364 for (i = 0; i < hash->size; i++) {
365 head = &hash->table[i];
368 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
369 neigh_node = batadv_orig_router_get(orig_node,
374 n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
379 last_seen_jiffies = jiffies - orig_node->last_seen;
380 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
381 last_seen_secs = last_seen_msecs / 1000;
382 last_seen_msecs = last_seen_msecs % 1000;
384 seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:",
385 orig_node->orig, last_seen_secs,
387 n_ifinfo->bat_v.throughput / 10,
388 n_ifinfo->bat_v.throughput % 10,
390 neigh_node->if_incoming->net_dev->name);
392 batadv_v_orig_print_neigh(orig_node, if_outgoing, seq);
397 batadv_neigh_node_put(neigh_node);
399 batadv_neigh_ifinfo_put(n_ifinfo);
404 if (batman_count == 0)
405 seq_puts(seq, "No batman nodes in range ...\n");
410 * batadv_v_orig_dump_subentry() - Dump an originator subentry into a message
411 * @msg: Netlink message to dump into
412 * @portid: Port making netlink request
413 * @seq: Sequence number of netlink message
414 * @bat_priv: The bat priv with all the soft interface information
415 * @if_outgoing: Limit dump to entries with this outgoing interface
416 * @orig_node: Originator to dump
417 * @neigh_node: Single hops neighbour
418 * @best: Is the best originator
420 * Return: Error code, or 0 on success
423 batadv_v_orig_dump_subentry(struct sk_buff *msg, u32 portid, u32 seq,
424 struct batadv_priv *bat_priv,
425 struct batadv_hard_iface *if_outgoing,
426 struct batadv_orig_node *orig_node,
427 struct batadv_neigh_node *neigh_node,
430 struct batadv_neigh_ifinfo *n_ifinfo;
431 unsigned int last_seen_msecs;
435 n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
439 throughput = n_ifinfo->bat_v.throughput * 100;
441 batadv_neigh_ifinfo_put(n_ifinfo);
443 last_seen_msecs = jiffies_to_msecs(jiffies - orig_node->last_seen);
445 if (if_outgoing != BATADV_IF_DEFAULT &&
446 if_outgoing != neigh_node->if_incoming)
449 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
450 BATADV_CMD_GET_ORIGINATORS);
454 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, orig_node->orig) ||
455 nla_put(msg, BATADV_ATTR_NEIGH_ADDRESS, ETH_ALEN,
457 nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
458 neigh_node->if_incoming->net_dev->ifindex) ||
459 nla_put_u32(msg, BATADV_ATTR_THROUGHPUT, throughput) ||
460 nla_put_u32(msg, BATADV_ATTR_LAST_SEEN_MSECS,
462 goto nla_put_failure;
464 if (best && nla_put_flag(msg, BATADV_ATTR_FLAG_BEST))
465 goto nla_put_failure;
467 genlmsg_end(msg, hdr);
471 genlmsg_cancel(msg, hdr);
476 * batadv_v_orig_dump_entry() - Dump an originator entry into a message
477 * @msg: Netlink message to dump into
478 * @portid: Port making netlink request
479 * @seq: Sequence number of netlink message
480 * @bat_priv: The bat priv with all the soft interface information
481 * @if_outgoing: Limit dump to entries with this outgoing interface
482 * @orig_node: Originator to dump
483 * @sub_s: Number of sub entries to skip
485 * This function assumes the caller holds rcu_read_lock().
487 * Return: Error code, or 0 on success
490 batadv_v_orig_dump_entry(struct sk_buff *msg, u32 portid, u32 seq,
491 struct batadv_priv *bat_priv,
492 struct batadv_hard_iface *if_outgoing,
493 struct batadv_orig_node *orig_node, int *sub_s)
495 struct batadv_neigh_node *neigh_node_best;
496 struct batadv_neigh_node *neigh_node;
500 neigh_node_best = batadv_orig_router_get(orig_node, if_outgoing);
501 if (!neigh_node_best)
504 hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) {
508 best = (neigh_node == neigh_node_best);
510 if (batadv_v_orig_dump_subentry(msg, portid, seq, bat_priv,
511 if_outgoing, orig_node,
513 batadv_neigh_node_put(neigh_node_best);
522 batadv_neigh_node_put(neigh_node_best);
529 * batadv_v_orig_dump_bucket() - Dump an originator bucket into a message
530 * @msg: Netlink message to dump into
531 * @portid: Port making netlink request
532 * @seq: Sequence number of netlink message
533 * @bat_priv: The bat priv with all the soft interface information
534 * @if_outgoing: Limit dump to entries with this outgoing interface
535 * @head: Bucket to be dumped
536 * @idx_s: Number of entries to be skipped
537 * @sub: Number of sub entries to be skipped
539 * Return: Error code, or 0 on success
542 batadv_v_orig_dump_bucket(struct sk_buff *msg, u32 portid, u32 seq,
543 struct batadv_priv *bat_priv,
544 struct batadv_hard_iface *if_outgoing,
545 struct hlist_head *head, int *idx_s, int *sub)
547 struct batadv_orig_node *orig_node;
551 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
555 if (batadv_v_orig_dump_entry(msg, portid, seq, bat_priv,
556 if_outgoing, orig_node, sub)) {
570 * batadv_v_orig_dump() - Dump the originators into a message
571 * @msg: Netlink message to dump into
572 * @cb: Control block containing additional options
573 * @bat_priv: The bat priv with all the soft interface information
574 * @if_outgoing: Limit dump to entries with this outgoing interface
577 batadv_v_orig_dump(struct sk_buff *msg, struct netlink_callback *cb,
578 struct batadv_priv *bat_priv,
579 struct batadv_hard_iface *if_outgoing)
581 struct batadv_hashtable *hash = bat_priv->orig_hash;
582 struct hlist_head *head;
583 int bucket = cb->args[0];
584 int idx = cb->args[1];
585 int sub = cb->args[2];
586 int portid = NETLINK_CB(cb->skb).portid;
588 while (bucket < hash->size) {
589 head = &hash->table[bucket];
591 if (batadv_v_orig_dump_bucket(msg, portid,
593 bat_priv, if_outgoing, head, &idx,
600 cb->args[0] = bucket;
605 static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1,
606 struct batadv_hard_iface *if_outgoing1,
607 struct batadv_neigh_node *neigh2,
608 struct batadv_hard_iface *if_outgoing2)
610 struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
613 ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
617 ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
621 ret = ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput;
623 batadv_neigh_ifinfo_put(ifinfo2);
625 batadv_neigh_ifinfo_put(ifinfo1);
630 static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1,
631 struct batadv_hard_iface *if_outgoing1,
632 struct batadv_neigh_node *neigh2,
633 struct batadv_hard_iface *if_outgoing2)
635 struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2;
639 ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1);
643 ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2);
647 threshold = ifinfo1->bat_v.throughput / 4;
648 threshold = ifinfo1->bat_v.throughput - threshold;
650 ret = ifinfo2->bat_v.throughput > threshold;
652 batadv_neigh_ifinfo_put(ifinfo2);
654 batadv_neigh_ifinfo_put(ifinfo1);
660 * batadv_v_init_sel_class() - initialize GW selection class
661 * @bat_priv: the bat priv with all the soft interface information
663 static void batadv_v_init_sel_class(struct batadv_priv *bat_priv)
665 /* set default throughput difference threshold to 5Mbps */
666 atomic_set(&bat_priv->gw.sel_class, 50);
669 static ssize_t batadv_v_store_sel_class(struct batadv_priv *bat_priv,
670 char *buff, size_t count)
672 u32 old_class, class;
674 if (!batadv_parse_throughput(bat_priv->soft_iface, buff,
675 "B.A.T.M.A.N. V GW selection class",
679 old_class = atomic_read(&bat_priv->gw.sel_class);
680 atomic_set(&bat_priv->gw.sel_class, class);
682 if (old_class != class)
683 batadv_gw_reselect(bat_priv);
688 static ssize_t batadv_v_show_sel_class(struct batadv_priv *bat_priv, char *buff)
690 u32 class = atomic_read(&bat_priv->gw.sel_class);
692 return sprintf(buff, "%u.%u MBit\n", class / 10, class % 10);
696 * batadv_v_gw_throughput_get() - retrieve the GW-bandwidth for a given GW
697 * @gw_node: the GW to retrieve the metric for
698 * @bw: the pointer where the metric will be stored. The metric is computed as
699 * the minimum between the GW advertised throughput and the path throughput to
702 * Return: 0 on success, -1 on failure
704 static int batadv_v_gw_throughput_get(struct batadv_gw_node *gw_node, u32 *bw)
706 struct batadv_neigh_ifinfo *router_ifinfo = NULL;
707 struct batadv_orig_node *orig_node;
708 struct batadv_neigh_node *router;
711 orig_node = gw_node->orig_node;
712 router = batadv_orig_router_get(orig_node, BATADV_IF_DEFAULT);
716 router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
720 /* the GW metric is computed as the minimum between the path throughput
721 * to reach the GW itself and the advertised bandwidth.
722 * This gives us an approximation of the effective throughput that the
723 * client can expect via this particular GW node
725 *bw = router_ifinfo->bat_v.throughput;
726 *bw = min_t(u32, *bw, gw_node->bandwidth_down);
731 batadv_neigh_node_put(router);
733 batadv_neigh_ifinfo_put(router_ifinfo);
739 * batadv_v_gw_get_best_gw_node() - retrieve the best GW node
740 * @bat_priv: the bat priv with all the soft interface information
742 * Return: the GW node having the best GW-metric, NULL if no GW is known
744 static struct batadv_gw_node *
745 batadv_v_gw_get_best_gw_node(struct batadv_priv *bat_priv)
747 struct batadv_gw_node *gw_node, *curr_gw = NULL;
751 hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) {
752 if (!kref_get_unless_zero(&gw_node->refcount))
755 if (batadv_v_gw_throughput_get(gw_node, &bw) < 0)
758 if (curr_gw && bw <= max_bw)
762 batadv_gw_node_put(curr_gw);
765 kref_get(&curr_gw->refcount);
769 batadv_gw_node_put(gw_node);
777 * batadv_v_gw_is_eligible() - check if a originator would be selected as GW
778 * @bat_priv: the bat priv with all the soft interface information
779 * @curr_gw_orig: originator representing the currently selected GW
780 * @orig_node: the originator representing the new candidate
782 * Return: true if orig_node can be selected as current GW, false otherwise
784 static bool batadv_v_gw_is_eligible(struct batadv_priv *bat_priv,
785 struct batadv_orig_node *curr_gw_orig,
786 struct batadv_orig_node *orig_node)
788 struct batadv_gw_node *curr_gw, *orig_gw = NULL;
789 u32 gw_throughput, orig_throughput, threshold;
792 threshold = atomic_read(&bat_priv->gw.sel_class);
794 curr_gw = batadv_gw_node_get(bat_priv, curr_gw_orig);
800 if (batadv_v_gw_throughput_get(curr_gw, &gw_throughput) < 0) {
805 orig_gw = batadv_gw_node_get(bat_priv, orig_node);
809 if (batadv_v_gw_throughput_get(orig_gw, &orig_throughput) < 0)
812 if (orig_throughput < gw_throughput)
815 if ((orig_throughput - gw_throughput) < threshold)
818 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
819 "Restarting gateway selection: better gateway found (throughput curr: %u, throughput new: %u)\n",
820 gw_throughput, orig_throughput);
825 batadv_gw_node_put(curr_gw);
827 batadv_gw_node_put(orig_gw);
832 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
833 /* fails if orig_node has no router */
834 static int batadv_v_gw_write_buffer_text(struct batadv_priv *bat_priv,
835 struct seq_file *seq,
836 const struct batadv_gw_node *gw_node)
838 struct batadv_gw_node *curr_gw;
839 struct batadv_neigh_node *router;
840 struct batadv_neigh_ifinfo *router_ifinfo = NULL;
843 router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
847 router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
851 curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
853 seq_printf(seq, "%s %pM (%9u.%1u) %pM [%10s]: %u.%u/%u.%u MBit\n",
854 (curr_gw == gw_node ? "=>" : " "),
855 gw_node->orig_node->orig,
856 router_ifinfo->bat_v.throughput / 10,
857 router_ifinfo->bat_v.throughput % 10, router->addr,
858 router->if_incoming->net_dev->name,
859 gw_node->bandwidth_down / 10,
860 gw_node->bandwidth_down % 10,
861 gw_node->bandwidth_up / 10,
862 gw_node->bandwidth_up % 10);
863 ret = seq_has_overflowed(seq) ? -1 : 0;
866 batadv_gw_node_put(curr_gw);
869 batadv_neigh_ifinfo_put(router_ifinfo);
871 batadv_neigh_node_put(router);
876 * batadv_v_gw_print() - print the gateway list
877 * @bat_priv: the bat priv with all the soft interface information
878 * @seq: gateway table seq_file struct
880 static void batadv_v_gw_print(struct batadv_priv *bat_priv,
881 struct seq_file *seq)
883 struct batadv_gw_node *gw_node;
887 " Gateway ( throughput) Nexthop [outgoingIF]: advertised uplink bandwidth\n");
890 hlist_for_each_entry_rcu(gw_node, &bat_priv->gw.gateway_list, list) {
891 /* fails if orig_node has no router */
892 if (batadv_v_gw_write_buffer_text(bat_priv, seq, gw_node) < 0)
900 seq_puts(seq, "No gateways in range ...\n");
905 * batadv_v_gw_dump_entry() - Dump a gateway into a message
906 * @msg: Netlink message to dump into
907 * @portid: Port making netlink request
908 * @cb: Control block containing additional options
909 * @bat_priv: The bat priv with all the soft interface information
910 * @gw_node: Gateway to be dumped
912 * Return: Error code, or 0 on success
914 static int batadv_v_gw_dump_entry(struct sk_buff *msg, u32 portid,
915 struct netlink_callback *cb,
916 struct batadv_priv *bat_priv,
917 struct batadv_gw_node *gw_node)
919 struct batadv_neigh_ifinfo *router_ifinfo = NULL;
920 struct batadv_neigh_node *router;
921 struct batadv_gw_node *curr_gw = NULL;
925 router = batadv_orig_router_get(gw_node->orig_node, BATADV_IF_DEFAULT);
929 router_ifinfo = batadv_neigh_ifinfo_get(router, BATADV_IF_DEFAULT);
933 curr_gw = batadv_gw_get_selected_gw_node(bat_priv);
935 hdr = genlmsg_put(msg, portid, cb->nlh->nlmsg_seq,
936 &batadv_netlink_family, NLM_F_MULTI,
937 BATADV_CMD_GET_GATEWAYS);
943 genl_dump_check_consistent(cb, hdr);
947 if (curr_gw == gw_node) {
948 if (nla_put_flag(msg, BATADV_ATTR_FLAG_BEST)) {
949 genlmsg_cancel(msg, hdr);
954 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN,
955 gw_node->orig_node->orig)) {
956 genlmsg_cancel(msg, hdr);
960 if (nla_put_u32(msg, BATADV_ATTR_THROUGHPUT,
961 router_ifinfo->bat_v.throughput)) {
962 genlmsg_cancel(msg, hdr);
966 if (nla_put(msg, BATADV_ATTR_ROUTER, ETH_ALEN, router->addr)) {
967 genlmsg_cancel(msg, hdr);
971 if (nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
972 router->if_incoming->net_dev->name)) {
973 genlmsg_cancel(msg, hdr);
977 if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_DOWN,
978 gw_node->bandwidth_down)) {
979 genlmsg_cancel(msg, hdr);
983 if (nla_put_u32(msg, BATADV_ATTR_BANDWIDTH_UP, gw_node->bandwidth_up)) {
984 genlmsg_cancel(msg, hdr);
988 genlmsg_end(msg, hdr);
993 batadv_gw_node_put(curr_gw);
995 batadv_neigh_ifinfo_put(router_ifinfo);
997 batadv_neigh_node_put(router);
1002 * batadv_v_gw_dump() - Dump gateways into a message
1003 * @msg: Netlink message to dump into
1004 * @cb: Control block containing additional options
1005 * @bat_priv: The bat priv with all the soft interface information
1007 static void batadv_v_gw_dump(struct sk_buff *msg, struct netlink_callback *cb,
1008 struct batadv_priv *bat_priv)
1010 int portid = NETLINK_CB(cb->skb).portid;
1011 struct batadv_gw_node *gw_node;
1012 int idx_skip = cb->args[0];
1015 spin_lock_bh(&bat_priv->gw.list_lock);
1016 cb->seq = bat_priv->gw.generation << 1 | 1;
1018 hlist_for_each_entry(gw_node, &bat_priv->gw.gateway_list, list) {
1019 if (idx++ < idx_skip)
1022 if (batadv_v_gw_dump_entry(msg, portid, cb, bat_priv,
1031 spin_unlock_bh(&bat_priv->gw.list_lock);
1033 cb->args[0] = idx_skip;
1036 static struct batadv_algo_ops batadv_batman_v __read_mostly = {
1039 .activate = batadv_v_iface_activate,
1040 .enable = batadv_v_iface_enable,
1041 .disable = batadv_v_iface_disable,
1042 .update_mac = batadv_v_iface_update_mac,
1043 .primary_set = batadv_v_primary_iface_set,
1046 .hardif_init = batadv_v_hardif_neigh_init,
1047 .cmp = batadv_v_neigh_cmp,
1048 .is_similar_or_better = batadv_v_neigh_is_sob,
1049 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1050 .print = batadv_v_neigh_print,
1052 .dump = batadv_v_neigh_dump,
1055 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1056 .print = batadv_v_orig_print,
1058 .dump = batadv_v_orig_dump,
1061 .init_sel_class = batadv_v_init_sel_class,
1062 .store_sel_class = batadv_v_store_sel_class,
1063 .show_sel_class = batadv_v_show_sel_class,
1064 .get_best_gw_node = batadv_v_gw_get_best_gw_node,
1065 .is_eligible = batadv_v_gw_is_eligible,
1066 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1067 .print = batadv_v_gw_print,
1069 .dump = batadv_v_gw_dump,
1074 * batadv_v_hardif_init() - initialize the algorithm specific fields in the
1075 * hard-interface object
1076 * @hard_iface: the hard-interface to initialize
1078 void batadv_v_hardif_init(struct batadv_hard_iface *hard_iface)
1080 /* enable link throughput auto-detection by setting the throughput
1083 atomic_set(&hard_iface->bat_v.throughput_override, 0);
1084 atomic_set(&hard_iface->bat_v.elp_interval, 500);
1086 hard_iface->bat_v.aggr_len = 0;
1087 skb_queue_head_init(&hard_iface->bat_v.aggr_list);
1088 spin_lock_init(&hard_iface->bat_v.aggr_list_lock);
1089 INIT_DELAYED_WORK(&hard_iface->bat_v.aggr_wq,
1090 batadv_v_ogm_aggr_work);
1094 * batadv_v_mesh_init() - initialize the B.A.T.M.A.N. V private resources for a
1096 * @bat_priv: the object representing the mesh interface to initialise
1098 * Return: 0 on success or a negative error code otherwise
1100 int batadv_v_mesh_init(struct batadv_priv *bat_priv)
1104 ret = batadv_v_ogm_init(bat_priv);
1112 * batadv_v_mesh_free() - free the B.A.T.M.A.N. V private resources for a mesh
1113 * @bat_priv: the object representing the mesh interface to free
1115 void batadv_v_mesh_free(struct batadv_priv *bat_priv)
1117 batadv_v_ogm_free(bat_priv);
1121 * batadv_v_init() - B.A.T.M.A.N. V initialization function
1123 * Description: Takes care of initializing all the subcomponents.
1124 * It is invoked upon module load only.
1126 * Return: 0 on success or a negative error code otherwise
1128 int __init batadv_v_init(void)
1132 /* B.A.T.M.A.N. V echo location protocol packet */
1133 ret = batadv_recv_handler_register(BATADV_ELP,
1134 batadv_v_elp_packet_recv);
1138 ret = batadv_recv_handler_register(BATADV_OGM2,
1139 batadv_v_ogm_packet_recv);
1141 goto elp_unregister;
1143 ret = batadv_algo_register(&batadv_batman_v);
1145 goto ogm_unregister;
1150 batadv_recv_handler_unregister(BATADV_OGM2);
1153 batadv_recv_handler_unregister(BATADV_ELP);