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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: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
This commit is contained in:
Linus Lüssing 2016-05-10 18:41:27 +02:00 committed by Simon Wunderlich
parent 72f7b2deaf
commit 4e3e823b5a
3 changed files with 130 additions and 0 deletions
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23
net/batman-adv/debugfs.c
View File

@ -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,
};

104
net/batman-adv/multicast.c
View File

@ -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

3
net/batman-adv/multicast.h
View File

@ -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);