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
Simon Wunderlich
parent
72f7b2deaf
commit
4e3e823b5a
3 changed files with 130 additions and 0 deletions
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@ -48,6 +48,7 @@
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#include "distributed-arp-table.h"
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#include "gateway_client.h"
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#include "icmp_socket.h"
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#include "multicast.h"
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#include "network-coding.h"
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#include "originator.h"
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#include "translation-table.h"
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@ -363,6 +364,22 @@ static int batadv_nc_nodes_open(struct inode *inode, struct file *file)
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}
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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/**
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* batadv_mcast_flags_open - prepare file handler for reads from mcast_flags
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* @inode: inode which was opened
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* @file: file handle to be initialized
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*
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* Return: 0 on success or negative error number in case of failure
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*/
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static int batadv_mcast_flags_open(struct inode *inode, struct file *file)
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{
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struct net_device *net_dev = (struct net_device *)inode->i_private;
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return single_open(file, batadv_mcast_flags_seq_print_text, net_dev);
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}
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#endif
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#define BATADV_DEBUGINFO(_name, _mode, _open) \
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struct batadv_debuginfo batadv_debuginfo_##_name = { \
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.attr = { \
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@ -407,6 +424,9 @@ static BATADV_DEBUGINFO(transtable_local, S_IRUGO,
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#ifdef CONFIG_BATMAN_ADV_NC
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static BATADV_DEBUGINFO(nc_nodes, S_IRUGO, batadv_nc_nodes_open);
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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static BATADV_DEBUGINFO(mcast_flags, S_IRUGO, batadv_mcast_flags_open);
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#endif
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static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
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&batadv_debuginfo_neighbors,
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@ -423,6 +443,9 @@ static struct batadv_debuginfo *batadv_mesh_debuginfos[] = {
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&batadv_debuginfo_transtable_local,
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#ifdef CONFIG_BATMAN_ADV_NC
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&batadv_debuginfo_nc_nodes,
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#endif
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#ifdef CONFIG_BATMAN_ADV_MCAST
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&batadv_debuginfo_mcast_flags,
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#endif
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NULL,
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};
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@ -41,6 +41,7 @@
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#include <linux/printk.h>
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#include <linux/rculist.h>
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#include <linux/rcupdate.h>
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#include <linux/seq_file.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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@ -52,6 +53,8 @@
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#include <net/ip.h>
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#include <net/ipv6.h>
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#include "hard-interface.h"
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#include "hash.h"
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#include "packet.h"
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#include "translation-table.h"
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@ -1129,6 +1132,107 @@ void batadv_mcast_init(struct batadv_priv *bat_priv)
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BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
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}
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/**
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* batadv_mcast_flags_print_header - print own mcast flags to debugfs table
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* @bat_priv: the bat priv with all the soft interface information
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* @seq: debugfs table seq_file struct
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*
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* Prints our own multicast flags including a more specific reason why
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* they are set, that is prints the bridge and querier state too, to
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* the debugfs table specified via @seq.
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*/
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static void batadv_mcast_flags_print_header(struct batadv_priv *bat_priv,
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struct seq_file *seq)
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{
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u8 flags = bat_priv->mcast.flags;
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char querier4, querier6, shadowing4, shadowing6;
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bool bridged = bat_priv->mcast.bridged;
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if (bridged) {
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querier4 = bat_priv->mcast.querier_ipv4.exists ? '.' : '4';
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querier6 = bat_priv->mcast.querier_ipv6.exists ? '.' : '6';
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shadowing4 = bat_priv->mcast.querier_ipv4.shadowing ? '4' : '.';
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shadowing6 = bat_priv->mcast.querier_ipv6.shadowing ? '6' : '.';
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} else {
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querier4 = '?';
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querier6 = '?';
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shadowing4 = '?';
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shadowing6 = '?';
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}
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seq_printf(seq, "Multicast flags (own flags: [%c%c%c])\n",
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(flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.',
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(flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.',
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(flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.');
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seq_printf(seq, "* Bridged [U]\t\t\t\t%c\n", bridged ? 'U' : '.');
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seq_printf(seq, "* No IGMP/MLD Querier [4/6]:\t\t%c/%c\n",
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querier4, querier6);
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seq_printf(seq, "* Shadowing IGMP/MLD Querier [4/6]:\t%c/%c\n",
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shadowing4, shadowing6);
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seq_puts(seq, "-------------------------------------------\n");
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seq_printf(seq, " %-10s %s\n", "Originator", "Flags");
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}
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/**
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* batadv_mcast_flags_seq_print_text - print the mcast flags of other nodes
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* @seq: seq file to print on
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* @offset: not used
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*
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* This prints a table of (primary) originators and their according
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* multicast flags, including (in the header) our own.
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*
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* Return: always 0
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*/
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int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset)
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{
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struct net_device *net_dev = (struct net_device *)seq->private;
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struct batadv_priv *bat_priv = netdev_priv(net_dev);
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struct batadv_hard_iface *primary_if;
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct batadv_orig_node *orig_node;
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struct hlist_head *head;
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u8 flags;
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u32 i;
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primary_if = batadv_seq_print_text_primary_if_get(seq);
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if (!primary_if)
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return 0;
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batadv_mcast_flags_print_header(bat_priv, seq);
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for (i = 0; i < hash->size; i++) {
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head = &hash->table[i];
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rcu_read_lock();
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hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
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if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST,
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&orig_node->capa_initialized))
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continue;
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if (!test_bit(BATADV_ORIG_CAPA_HAS_MCAST,
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&orig_node->capabilities)) {
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seq_printf(seq, "%pM -\n", orig_node->orig);
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continue;
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}
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flags = orig_node->mcast_flags;
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seq_printf(seq, "%pM [%c%c%c]\n", orig_node->orig,
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(flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES)
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? 'U' : '.',
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(flags & BATADV_MCAST_WANT_ALL_IPV4)
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? '4' : '.',
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(flags & BATADV_MCAST_WANT_ALL_IPV6)
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? '6' : '.');
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}
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rcu_read_unlock();
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}
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batadv_hardif_put(primary_if);
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return 0;
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}
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/**
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* batadv_mcast_free - free the multicast optimizations structures
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* @bat_priv: the bat priv with all the soft interface information
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@ -20,6 +20,7 @@
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#include "main.h"
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struct seq_file;
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struct sk_buff;
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/**
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@ -46,6 +47,8 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
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void batadv_mcast_init(struct batadv_priv *bat_priv);
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int batadv_mcast_flags_seq_print_text(struct seq_file *seq, void *offset);
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void batadv_mcast_free(struct batadv_priv *bat_priv);
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void batadv_mcast_purge_orig(struct batadv_orig_node *orig_node);
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