From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- net/batman-adv/bat_v.c | 359 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 359 insertions(+) create mode 100644 net/batman-adv/bat_v.c (limited to 'net/batman-adv/bat_v.c') diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c new file mode 100644 index 000000000..4026f198a --- /dev/null +++ b/net/batman-adv/bat_v.c @@ -0,0 +1,359 @@ +/* Copyright (C) 2013-2016 B.A.T.M.A.N. contributors: + * + * Linus Lüssing, Marek Lindner + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#include "bat_algo.h" +#include "main.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "bat_v_elp.h" +#include "bat_v_ogm.h" +#include "hard-interface.h" +#include "hash.h" +#include "originator.h" +#include "packet.h" + +static void batadv_v_iface_activate(struct batadv_hard_iface *hard_iface) +{ + /* B.A.T.M.A.N. V does not use any queuing mechanism, therefore it can + * set the interface as ACTIVE right away, without any risk of race + * condition + */ + if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) + hard_iface->if_status = BATADV_IF_ACTIVE; +} + +static int batadv_v_iface_enable(struct batadv_hard_iface *hard_iface) +{ + int ret; + + ret = batadv_v_elp_iface_enable(hard_iface); + if (ret < 0) + return ret; + + ret = batadv_v_ogm_iface_enable(hard_iface); + if (ret < 0) + batadv_v_elp_iface_disable(hard_iface); + + /* enable link throughput auto-detection by setting the throughput + * override to zero + */ + atomic_set(&hard_iface->bat_v.throughput_override, 0); + + return ret; +} + +static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface) +{ + batadv_v_elp_iface_disable(hard_iface); +} + +static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface) +{ +} + +static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface) +{ + batadv_v_elp_primary_iface_set(hard_iface); + batadv_v_ogm_primary_iface_set(hard_iface); +} + +static void +batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh) +{ + ewma_throughput_init(&hardif_neigh->bat_v.throughput); + INIT_WORK(&hardif_neigh->bat_v.metric_work, + batadv_v_elp_throughput_metric_update); +} + +static void batadv_v_ogm_schedule(struct batadv_hard_iface *hard_iface) +{ +} + +static void batadv_v_ogm_emit(struct batadv_forw_packet *forw_packet) +{ +} + +/** + * batadv_v_orig_print_neigh - print neighbors for the originator table + * @orig_node: the orig_node for which the neighbors are printed + * @if_outgoing: outgoing interface for these entries + * @seq: debugfs table seq_file struct + * + * Must be called while holding an rcu lock. + */ +static void +batadv_v_orig_print_neigh(struct batadv_orig_node *orig_node, + struct batadv_hard_iface *if_outgoing, + struct seq_file *seq) +{ + struct batadv_neigh_node *neigh_node; + struct batadv_neigh_ifinfo *n_ifinfo; + + hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); + if (!n_ifinfo) + continue; + + seq_printf(seq, " %pM (%9u.%1u)", + neigh_node->addr, + n_ifinfo->bat_v.throughput / 10, + n_ifinfo->bat_v.throughput % 10); + + batadv_neigh_ifinfo_put(n_ifinfo); + } +} + +/** + * batadv_v_hardif_neigh_print - print a single ELP neighbour node + * @seq: neighbour table seq_file struct + * @hardif_neigh: hardif neighbour information + */ +static void +batadv_v_hardif_neigh_print(struct seq_file *seq, + struct batadv_hardif_neigh_node *hardif_neigh) +{ + int last_secs, last_msecs; + u32 throughput; + + last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; + last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; + throughput = ewma_throughput_read(&hardif_neigh->bat_v.throughput); + + seq_printf(seq, "%pM %4i.%03is (%9u.%1u) [%10s]\n", + hardif_neigh->addr, last_secs, last_msecs, throughput / 10, + throughput % 10, hardif_neigh->if_incoming->net_dev->name); +} + +/** + * batadv_v_neigh_print - print the single hop neighbour list + * @bat_priv: the bat priv with all the soft interface information + * @seq: neighbour table seq_file struct + */ +static void batadv_v_neigh_print(struct batadv_priv *bat_priv, + struct seq_file *seq) +{ + struct net_device *net_dev = (struct net_device *)seq->private; + struct batadv_hardif_neigh_node *hardif_neigh; + struct batadv_hard_iface *hard_iface; + int batman_count = 0; + + seq_printf(seq, " %-15s %s (%11s) [%10s]\n", "Neighbor", + "last-seen", "throughput", "IF"); + + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { + if (hard_iface->soft_iface != net_dev) + continue; + + hlist_for_each_entry_rcu(hardif_neigh, + &hard_iface->neigh_list, list) { + batadv_v_hardif_neigh_print(seq, hardif_neigh); + batman_count++; + } + } + rcu_read_unlock(); + + if (batman_count == 0) + seq_puts(seq, "No batman nodes in range ...\n"); +} + +/** + * batadv_v_orig_print - print the originator table + * @bat_priv: the bat priv with all the soft interface information + * @seq: debugfs table seq_file struct + * @if_outgoing: the outgoing interface for which this should be printed + */ +static void batadv_v_orig_print(struct batadv_priv *bat_priv, + struct seq_file *seq, + struct batadv_hard_iface *if_outgoing) +{ + struct batadv_neigh_node *neigh_node; + struct batadv_hashtable *hash = bat_priv->orig_hash; + int last_seen_msecs, last_seen_secs; + struct batadv_orig_node *orig_node; + struct batadv_neigh_ifinfo *n_ifinfo; + unsigned long last_seen_jiffies; + struct hlist_head *head; + int batman_count = 0; + u32 i; + + seq_printf(seq, " %-15s %s (%11s) %17s [%10s]: %20s ...\n", + "Originator", "last-seen", "throughput", "Nexthop", + "outgoingIF", "Potential nexthops"); + + for (i = 0; i < hash->size; i++) { + head = &hash->table[i]; + + rcu_read_lock(); + hlist_for_each_entry_rcu(orig_node, head, hash_entry) { + neigh_node = batadv_orig_router_get(orig_node, + if_outgoing); + if (!neigh_node) + continue; + + n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, + if_outgoing); + if (!n_ifinfo) + goto next; + + last_seen_jiffies = jiffies - orig_node->last_seen; + last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); + last_seen_secs = last_seen_msecs / 1000; + last_seen_msecs = last_seen_msecs % 1000; + + seq_printf(seq, "%pM %4i.%03is (%9u.%1u) %pM [%10s]:", + orig_node->orig, last_seen_secs, + last_seen_msecs, + n_ifinfo->bat_v.throughput / 10, + n_ifinfo->bat_v.throughput % 10, + neigh_node->addr, + neigh_node->if_incoming->net_dev->name); + + batadv_v_orig_print_neigh(orig_node, if_outgoing, seq); + seq_puts(seq, "\n"); + batman_count++; + +next: + batadv_neigh_node_put(neigh_node); + if (n_ifinfo) + batadv_neigh_ifinfo_put(n_ifinfo); + } + rcu_read_unlock(); + } + + if (batman_count == 0) + seq_puts(seq, "No batman nodes in range ...\n"); +} + +static int batadv_v_neigh_cmp(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) +{ + struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; + + ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); + + if (WARN_ON(!ifinfo1 || !ifinfo2)) + return 0; + + return ifinfo1->bat_v.throughput - ifinfo2->bat_v.throughput; +} + +static bool batadv_v_neigh_is_sob(struct batadv_neigh_node *neigh1, + struct batadv_hard_iface *if_outgoing1, + struct batadv_neigh_node *neigh2, + struct batadv_hard_iface *if_outgoing2) +{ + struct batadv_neigh_ifinfo *ifinfo1, *ifinfo2; + u32 threshold; + + ifinfo1 = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); + ifinfo2 = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); + + threshold = ifinfo1->bat_v.throughput / 4; + threshold = ifinfo1->bat_v.throughput - threshold; + + return ifinfo2->bat_v.throughput > threshold; +} + +static struct batadv_algo_ops batadv_batman_v __read_mostly = { + .name = "BATMAN_V", + .bat_iface_activate = batadv_v_iface_activate, + .bat_iface_enable = batadv_v_iface_enable, + .bat_iface_disable = batadv_v_iface_disable, + .bat_iface_update_mac = batadv_v_iface_update_mac, + .bat_primary_iface_set = batadv_v_primary_iface_set, + .bat_hardif_neigh_init = batadv_v_hardif_neigh_init, + .bat_ogm_emit = batadv_v_ogm_emit, + .bat_ogm_schedule = batadv_v_ogm_schedule, + .bat_orig_print = batadv_v_orig_print, + .bat_neigh_cmp = batadv_v_neigh_cmp, + .bat_neigh_is_similar_or_better = batadv_v_neigh_is_sob, + .bat_neigh_print = batadv_v_neigh_print, +}; + +/** + * batadv_v_mesh_init - initialize the B.A.T.M.A.N. V private resources for a + * mesh + * @bat_priv: the object representing the mesh interface to initialise + * + * Return: 0 on success or a negative error code otherwise + */ +int batadv_v_mesh_init(struct batadv_priv *bat_priv) +{ + return batadv_v_ogm_init(bat_priv); +} + +/** + * batadv_v_mesh_free - free the B.A.T.M.A.N. V private resources for a mesh + * @bat_priv: the object representing the mesh interface to free + */ +void batadv_v_mesh_free(struct batadv_priv *bat_priv) +{ + batadv_v_ogm_free(bat_priv); +} + +/** + * batadv_v_init - B.A.T.M.A.N. V initialization function + * + * Description: Takes care of initializing all the subcomponents. + * It is invoked upon module load only. + * + * Return: 0 on success or a negative error code otherwise + */ +int __init batadv_v_init(void) +{ + int ret; + + /* B.A.T.M.A.N. V echo location protocol packet */ + ret = batadv_recv_handler_register(BATADV_ELP, + batadv_v_elp_packet_recv); + if (ret < 0) + return ret; + + ret = batadv_recv_handler_register(BATADV_OGM2, + batadv_v_ogm_packet_recv); + if (ret < 0) + goto elp_unregister; + + ret = batadv_algo_register(&batadv_batman_v); + if (ret < 0) + goto ogm_unregister; + + return ret; + +ogm_unregister: + batadv_recv_handler_unregister(BATADV_OGM2); + +elp_unregister: + batadv_recv_handler_unregister(BATADV_ELP); + + return ret; +} -- cgit v1.2.3-54-g00ecf