With this commit the full multicast forwarding table, which is used for determining whether to forward a multicast data packet or not, can now be displayed via mcast_forw_table in BATMAN's debugfs directory.
Signed-off-by: Linus Lüssing linus.luessing@saxnet.de --- bat_debugfs.c | 9 +++++ multicast.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ multicast.h | 1 + 3 files changed, 113 insertions(+), 0 deletions(-)
diff --git a/batman-adv/bat_debugfs.c b/batman-adv/bat_debugfs.c index 0e9d435..30cd4e9 100644 --- a/batman-adv/bat_debugfs.c +++ b/batman-adv/bat_debugfs.c @@ -32,6 +32,7 @@ #include "soft-interface.h" #include "vis.h" #include "icmp_socket.h" +#include "multicast.h"
static struct dentry *bat_debugfs;
@@ -250,6 +251,12 @@ static int transtable_local_open(struct inode *inode, struct file *file) return single_open(file, hna_local_seq_print_text, net_dev); }
+static int mcast_forw_table_open(struct inode *inode, struct file *file) +{ + struct net_device *net_dev = (struct net_device *)inode->i_private; + return single_open(file, mcast_forw_table_seq_print_text, net_dev); +} + static int vis_data_open(struct inode *inode, struct file *file) { struct net_device *net_dev = (struct net_device *)inode->i_private; @@ -278,6 +285,7 @@ static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open); static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open); static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open); static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open); +static BAT_DEBUGINFO(mcast_forw_table, S_IRUGO, mcast_forw_table_open); static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
static struct bat_debuginfo *mesh_debuginfos[] = { @@ -286,6 +294,7 @@ static struct bat_debuginfo *mesh_debuginfos[] = { &bat_debuginfo_softif_neigh, &bat_debuginfo_transtable_global, &bat_debuginfo_transtable_local, + &bat_debuginfo_mcast_forw_table, &bat_debuginfo_vis_data, NULL, }; diff --git a/batman-adv/multicast.c b/batman-adv/multicast.c index b1718c6..b53825f 100644 --- a/batman-adv/multicast.c +++ b/batman-adv/multicast.c @@ -164,6 +164,24 @@ void mcast_tracker_reset(struct bat_priv *bat_priv) start_mcast_tracker(bat_priv); }
+static inline int get_remaining_timeout( + struct mcast_forw_nexthop_entry *nexthop_entry, + struct bat_priv *bat_priv) +{ + int tracker_timeout = atomic_read(&bat_priv->mcast_tracker_timeout); + if (!tracker_timeout) + tracker_timeout = atomic_read(&bat_priv->mcast_tracker_interval) + * TRACKER_TIMEOUT_AUTO_X; + if (!tracker_timeout) + tracker_timeout = atomic_read(&bat_priv->orig_interval) + * TRACKER_TIMEOUT_AUTO_X / 2; + + tracker_timeout = jiffies_to_msecs(nexthop_entry->timeout) + + tracker_timeout - jiffies_to_msecs(jiffies); + + return (tracker_timeout > 0 ? tracker_timeout : 0); +} + static void prepare_forw_if_entry(struct hlist_head *forw_if_list, int16_t if_num, uint8_t *neigh_addr) { @@ -961,6 +979,91 @@ ok: return count; }
+static inline struct batman_if *if_num_to_batman_if(int16_t if_num) +{ + struct batman_if *batman_if; + + list_for_each_entry_rcu(batman_if, &if_list, list) + if (batman_if->if_num == if_num) + return batman_if; + + return NULL; +} + +static void seq_print_if_entry(struct mcast_forw_if_entry *if_entry, + struct bat_priv *bat_priv, struct seq_file *seq) +{ + struct mcast_forw_nexthop_entry *nexthop_entry; + struct hlist_node *node; + struct batman_if *batman_if; + + rcu_read_lock(); + batman_if = if_num_to_batman_if(if_entry->if_num); + if (!batman_if) { + rcu_read_unlock(); + return; + } + + seq_printf(seq, "\t\t%s\n", batman_if->net_dev->name); + rcu_read_unlock(); + + hlist_for_each_entry(nexthop_entry, node, + &if_entry->mcast_nexthop_list, list) + seq_printf(seq, "\t\t\t%pM - %i\n", nexthop_entry->neigh_addr, + get_remaining_timeout(nexthop_entry, bat_priv)); +} + +static void seq_print_orig_entry(struct mcast_forw_orig_entry *orig_entry, + struct bat_priv *bat_priv, + struct seq_file *seq) +{ + struct mcast_forw_if_entry *if_entry; + struct hlist_node *node; + + seq_printf(seq, "\t%pM\n", orig_entry->orig); + hlist_for_each_entry(if_entry, node, &orig_entry->mcast_if_list, + list) + seq_print_if_entry(if_entry, bat_priv, seq); +} + +static void seq_print_table_entry(struct mcast_forw_table_entry *table_entry, + struct bat_priv *bat_priv, + struct seq_file *seq) +{ + struct mcast_forw_orig_entry *orig_entry; + struct hlist_node *node; + + seq_printf(seq, "%pM\n", table_entry->mcast_addr); + hlist_for_each_entry(orig_entry, node, &table_entry->mcast_orig_list, + list) + seq_print_orig_entry(orig_entry, bat_priv, seq); +} + +int mcast_forw_table_seq_print_text(struct seq_file *seq, void *offset) +{ + struct net_device *net_dev = (struct net_device *)seq->private; + struct bat_priv *bat_priv = netdev_priv(net_dev); + struct mcast_forw_table_entry *table_entry; + struct hlist_node *node; + + seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n", + SOURCE_VERSION, REVISION_VERSION_STR, + bat_priv->primary_if->net_dev->name, + bat_priv->primary_if->net_dev->dev_addr, net_dev->name); + seq_printf(seq, "Multicast group MAC\tOriginator\t" + "Outgoing interface\tNexthop - timeout in msecs\n"); + + spin_lock_bh(&bat_priv->mcast_forw_table_lock); + + hlist_for_each_entry(table_entry, node, &bat_priv->mcast_forw_table, + list) + seq_print_table_entry(table_entry, bat_priv, seq); + + spin_unlock_bh(&bat_priv->mcast_forw_table_lock); + + return 0; +} + int mcast_init(struct bat_priv *bat_priv) { INIT_DELAYED_WORK(&bat_priv->mcast_tracker_work, mcast_tracker_timer); diff --git a/batman-adv/multicast.h b/batman-adv/multicast.h index d1a3e83..63d0e97 100644 --- a/batman-adv/multicast.h +++ b/batman-adv/multicast.h @@ -29,6 +29,7 @@ int mcast_tracker_timeout_set(struct net_device *net_dev, char *buff, void mcast_tracker_reset(struct bat_priv *bat_priv); void route_mcast_tracker_packet(struct sk_buff *tracker_packet, struct bat_priv *bat_priv); +int mcast_forw_table_seq_print_text(struct seq_file *seq, void *offset); int mcast_init(struct bat_priv *bat_priv); void mcast_free(struct bat_priv *bat_priv);