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Commit 4e3e823b authored by Linus Lüssing's avatar Linus Lüssing Committed by Simon Wunderlich
Browse files

batman-adv: Add debugfs table for mcast flags 



This patch adds a debugfs table with originators and their according
multicast flags to help users figure out why multicast optimizations
might be enabled or disabled for them.

Tested-by: default avatarSimon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: default avatarLinus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: default avatarMarek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
Signed-off-by: default avatarSimon Wunderlich <sw@simonwunderlich.de>
parent 72f7b2de

net/batman-adv/debugfs.c

+23 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#include "distributed-arp-table.h"

#include "gateway_client.h"

#include "icmp_socket.h"

#include "multicast.h"

#include "network-coding.h"

#include "originator.h"

#include "translation-table.h"
@@ -363,6 +364,22 @@ static int batadv_nc_nodes_open(struct inode *inode, struct file *file) 
}

#endif



#ifdef CONFIG_BATMAN_ADV_MCAST

/**

 * batadv_mcast_flags_open - prepare file handler for reads from mcast_flags

 * @inode: inode which was opened

 * @file: file handle to be initialized

 *

 * Return: 0 on success or negative error number in case of failure

 */

static int batadv_mcast_flags_open(struct inode *inode, struct file *file)

{

	struct net_device *net_dev = (struct net_device *)inode->i_private;



	return single_open(file, batadv_mcast_flags_seq_print_text, net_dev);

}

#endif



#define BATADV_DEBUGINFO(_name, _mode, _open)		\

struct batadv_debuginfo batadv_debuginfo_##_name = {	\

	.attr = {					\
@@ -407,6 +424,9 @@ static BATADV_DEBUGINFO(transtable_local, S_IRUGO, 
#ifdef CONFIG_BATMAN_ADV_NC

static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);

#endif

#ifdef CONFIG_BATMAN_ADV_MCAST

static BATADV_DEBUGINFO(mcast_flags, S_IRUGO, batadv_mcast_flags_open);

#endif



static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {

	&batadv_debuginfo_neighbors,
@@ -423,6 +443,9 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = { 
	&batadv_debuginfo_transtable_local,

#ifdef CONFIG_BATMAN_ADV_NC

	&batadv_debuginfo_nc_nodes,

#endif

#ifdef CONFIG_BATMAN_ADV_MCAST

	&batadv_debuginfo_mcast_flags,

#endif

	NULL,

};

net/batman-adv/multicast.c

+104 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ 
#include <linux/printk.h>

#include <linux/rculist.h>

#include <linux/rcupdate.h>

#include <linux/seq_file.h>

#include <linux/skbuff.h>

#include <linux/slab.h>

#include <linux/spinlock.h>
@@ -52,6 +53,8 @@ 
#include <net/ip.h>

#include <net/ipv6.h>



#include "hard-interface.h"

#include "hash.h"

#include "packet.h"

#include "translation-table.h"
@@ -1129,6 +1132,107 @@ void batadv_mcast_init(struct batadv_priv *bat_priv) 
				     BATADV_TVLV_HANDLER_OGM_CIFNOTFND);

}



/**

 * batadv_mcast_flags_print_header - print own mcast flags to debugfs table

 * @bat_priv: the bat priv with all the soft interface information

 * @seq: debugfs table seq_file struct

 *

 * Prints our own multicast flags including a more specific reason why

 * they are set, that is prints the bridge and querier state too, to

 * the debugfs table specified via @seq.

 */

static void batadv_mcast_flags_print_header(struct batadv_priv *bat_priv,

					    struct seq_file *seq)

{

	u8 flags = bat_priv->mcast.flags;

	char querier4, querier6, shadowing4, shadowing6;

	bool bridged = bat_priv->mcast.bridged;



	if (bridged) {

		querier4 = bat_priv->mcast.querier_ipv4.exists ? '.' : '4';

		querier6 = bat_priv->mcast.querier_ipv6.exists ? '.' : '6';

		shadowing4 = bat_priv->mcast.querier_ipv4.shadowing ? '4' : '.';

		shadowing6 = bat_priv->mcast.querier_ipv6.shadowing ? '6' : '.';

	} else {

		querier4 = '?';

		querier6 = '?';

		shadowing4 = '?';

		shadowing6 = '?';

	}



	seq_printf(seq, "Multicast flags (own flags: [%c%c%c])\n",

		   (flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.',

		   (flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.',

		   (flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.');

	seq_printf(seq, "* Bridged [U]\t\t\t\t%c\n", bridged ? 'U' : '.');

	seq_printf(seq, "* No IGMP/MLD Querier [4/6]:\t\t%c/%c\n",

		   querier4, querier6);

	seq_printf(seq, "* Shadowing IGMP/MLD Querier [4/6]:\t%c/%c\n",

		   shadowing4, shadowing6);

	seq_puts(seq, "-------------------------------------------\n");

	seq_printf(seq, "       %-10s %s\n", "Originator", "Flags");

}



/**

 * batadv_mcast_flags_seq_print_text - print the mcast flags of other nodes

 * @seq: seq file to print on

 * @offset: not used

 *

 * This prints a table of (primary) originators and their according

 * multicast flags, including (in the header) our own.

 *

 * Return: always 0

 */

int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset)

{

	struct net_device *net_dev = (struct net_device *)seq->private;

	struct batadv_priv *bat_priv = netdev_priv(net_dev);

	struct batadv_hard_iface *primary_if;

	struct batadv_hashtable *hash = bat_priv->orig_hash;

	struct batadv_orig_node *orig_node;

	struct hlist_head *head;

	u8 flags;

	u32 i;



	primary_if = batadv_seq_print_text_primary_if_get(seq);

	if (!primary_if)

		return 0;



	batadv_mcast_flags_print_header(bat_priv, seq);



	for (i = 0; i < hash->size; i++) {

		head = &hash->table[i];



		rcu_read_lock();

		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {

			if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST,

				      &orig_node->capa_initialized))

				continue;



			if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST,

				      &orig_node->capabilities)) {

				seq_printf(seq, "%pM -\n", orig_node->orig);

				continue;

			}



			flags = orig_node->mcast_flags;



			seq_printf(seq, "%pM [%c%c%c]\n", orig_node->orig,

				   (flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)

				   ? 'U' : '.',

				   (flags & BATADV_MCAST_WANT_ALL_IPV4)

				   ? '4' : '.',

				   (flags & BATADV_MCAST_WANT_ALL_IPV6)

				   ? '6' : '.');

		}

		rcu_read_unlock();

	}



	batadv_hardif_put(primary_if);



	return 0;

}



/**

 * batadv_mcast_free - free the multicast optimizations structures

 * @bat_priv: the bat priv with all the soft interface information

net/batman-adv/multicast.h

+3 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 


#include "main.h"



struct seq_file;

struct sk_buff;



/**
@@ -46,6 +47,8 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, 


void batadv_mcast_init(struct batadv_priv *bat_priv);



int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);



void batadv_mcast_free(struct batadv_priv *bat_priv);



void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);