batman-adv: Adding logging of mcast flag changes
With this patch changes relevant to a node's own multicast flags are printed to the 'mcast' log level. 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:
parent
687937ab34
commit
72f7b2deaf
|
@ -231,6 +231,7 @@ __be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr);
|
|||
* @BATADV_DBG_BLA: bridge loop avoidance messages
|
||||
* @BATADV_DBG_DAT: ARP snooping and DAT related messages
|
||||
* @BATADV_DBG_NC: network coding related messages
|
||||
* @BATADV_DBG_MCAST: multicast related messages
|
||||
* @BATADV_DBG_ALL: the union of all the above log levels
|
||||
*/
|
||||
enum batadv_dbg_level {
|
||||
|
@ -240,7 +241,8 @@ enum batadv_dbg_level {
|
|||
BATADV_DBG_BLA = BIT(3),
|
||||
BATADV_DBG_DAT = BIT(4),
|
||||
BATADV_DBG_NC = BIT(5),
|
||||
BATADV_DBG_ALL = 63,
|
||||
BATADV_DBG_MCAST = BIT(6),
|
||||
BATADV_DBG_ALL = 127,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_BATMAN_ADV_DEBUG
|
||||
|
|
|
@ -33,6 +33,7 @@
|
|||
#include <linux/in6.h>
|
||||
#include <linux/ip.h>
|
||||
#include <linux/ipv6.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/kref.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/lockdep.h>
|
||||
|
@ -333,6 +334,122 @@ static bool batadv_mcast_has_bridge(struct batadv_priv *bat_priv)
|
|||
return upper;
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_mcast_querier_log - debug output regarding the querier status on link
|
||||
* @bat_priv: the bat priv with all the soft interface information
|
||||
* @str_proto: a string for the querier protocol (e.g. "IGMP" or "MLD")
|
||||
* @old_state: the previous querier state on our link
|
||||
* @new_state: the new querier state on our link
|
||||
*
|
||||
* Outputs debug messages to the logging facility with log level 'mcast'
|
||||
* regarding changes to the querier status on the link which are relevant
|
||||
* to our multicast optimizations.
|
||||
*
|
||||
* Usually this is about whether a querier appeared or vanished in
|
||||
* our mesh or whether the querier is in the suboptimal position of being
|
||||
* behind our local bridge segment: Snooping switches will directly
|
||||
* forward listener reports to the querier, therefore batman-adv and
|
||||
* the bridge will potentially not see these listeners - the querier is
|
||||
* potentially shadowing listeners from us then.
|
||||
*
|
||||
* This is only interesting for nodes with a bridge on top of their
|
||||
* soft interface.
|
||||
*/
|
||||
static void
|
||||
batadv_mcast_querier_log(struct batadv_priv *bat_priv, char *str_proto,
|
||||
struct batadv_mcast_querier_state *old_state,
|
||||
struct batadv_mcast_querier_state *new_state)
|
||||
{
|
||||
if (!old_state->exists && new_state->exists)
|
||||
batadv_info(bat_priv->soft_iface, "%s Querier appeared\n",
|
||||
str_proto);
|
||||
else if (old_state->exists && !new_state->exists)
|
||||
batadv_info(bat_priv->soft_iface,
|
||||
"%s Querier disappeared - multicast optimizations disabled\n",
|
||||
str_proto);
|
||||
else if (!bat_priv->mcast.bridged && !new_state->exists)
|
||||
batadv_info(bat_priv->soft_iface,
|
||||
"No %s Querier present - multicast optimizations disabled\n",
|
||||
str_proto);
|
||||
|
||||
if (new_state->exists) {
|
||||
if ((!old_state->shadowing && new_state->shadowing) ||
|
||||
(!old_state->exists && new_state->shadowing))
|
||||
batadv_dbg(BATADV_DBG_MCAST, bat_priv,
|
||||
"%s Querier is behind our bridged segment: Might shadow listeners\n",
|
||||
str_proto);
|
||||
else if (old_state->shadowing && !new_state->shadowing)
|
||||
batadv_dbg(BATADV_DBG_MCAST, bat_priv,
|
||||
"%s Querier is not behind our bridged segment\n",
|
||||
str_proto);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_mcast_bridge_log - debug output for topology changes in bridged setups
|
||||
* @bat_priv: the bat priv with all the soft interface information
|
||||
* @bridged: a flag about whether the soft interface is currently bridged or not
|
||||
* @querier_ipv4: (maybe) new status of a potential, selected IGMP querier
|
||||
* @querier_ipv6: (maybe) new status of a potential, selected MLD querier
|
||||
*
|
||||
* If no bridges are ever used on this node, then this function does nothing.
|
||||
*
|
||||
* Otherwise this function outputs debug information to the 'mcast' log level
|
||||
* which might be relevant to our multicast optimizations.
|
||||
*
|
||||
* More precisely, it outputs information when a bridge interface is added or
|
||||
* removed from a soft interface. And when a bridge is present, it further
|
||||
* outputs information about the querier state which is relevant for the
|
||||
* multicast flags this node is going to set.
|
||||
*/
|
||||
static void
|
||||
batadv_mcast_bridge_log(struct batadv_priv *bat_priv, bool bridged,
|
||||
struct batadv_mcast_querier_state *querier_ipv4,
|
||||
struct batadv_mcast_querier_state *querier_ipv6)
|
||||
{
|
||||
if (!bat_priv->mcast.bridged && bridged)
|
||||
batadv_dbg(BATADV_DBG_MCAST, bat_priv,
|
||||
"Bridge added: Setting Unsnoopables(U)-flag\n");
|
||||
else if (bat_priv->mcast.bridged && !bridged)
|
||||
batadv_dbg(BATADV_DBG_MCAST, bat_priv,
|
||||
"Bridge removed: Unsetting Unsnoopables(U)-flag\n");
|
||||
|
||||
if (bridged) {
|
||||
batadv_mcast_querier_log(bat_priv, "IGMP",
|
||||
&bat_priv->mcast.querier_ipv4,
|
||||
querier_ipv4);
|
||||
batadv_mcast_querier_log(bat_priv, "MLD",
|
||||
&bat_priv->mcast.querier_ipv6,
|
||||
querier_ipv6);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_mcast_flags_logs - output debug information about mcast flag changes
|
||||
* @bat_priv: the bat priv with all the soft interface information
|
||||
* @flags: flags indicating the new multicast state
|
||||
*
|
||||
* Whenever the multicast flags this nodes announces changes (@mcast_flags vs.
|
||||
* bat_priv->mcast.flags), this notifies userspace via the 'mcast' log level.
|
||||
*/
|
||||
static void batadv_mcast_flags_log(struct batadv_priv *bat_priv, u8 flags)
|
||||
{
|
||||
u8 old_flags = bat_priv->mcast.flags;
|
||||
char str_old_flags[] = "[...]";
|
||||
|
||||
sprintf(str_old_flags, "[%c%c%c]",
|
||||
(old_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.',
|
||||
(old_flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.',
|
||||
(old_flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.');
|
||||
|
||||
batadv_dbg(BATADV_DBG_MCAST, bat_priv,
|
||||
"Changing multicast flags from '%s' to '[%c%c%c]'\n",
|
||||
bat_priv->mcast.enabled ? str_old_flags : "<undefined>",
|
||||
(flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES) ? 'U' : '.',
|
||||
(flags & BATADV_MCAST_WANT_ALL_IPV4) ? '4' : '.',
|
||||
(flags & BATADV_MCAST_WANT_ALL_IPV6) ? '6' : '.');
|
||||
}
|
||||
|
||||
/**
|
||||
* batadv_mcast_mla_tvlv_update - update multicast tvlv
|
||||
* @bat_priv: the bat priv with all the soft interface information
|
||||
|
@ -349,12 +466,13 @@ static bool batadv_mcast_mla_tvlv_update(struct batadv_priv *bat_priv)
|
|||
struct batadv_mcast_querier_state querier4 = {false, false};
|
||||
struct batadv_mcast_querier_state querier6 = {false, false};
|
||||
struct net_device *dev = bat_priv->soft_iface;
|
||||
bool bridged;
|
||||
|
||||
mcast_data.flags = BATADV_NO_FLAGS;
|
||||
memset(mcast_data.reserved, 0, sizeof(mcast_data.reserved));
|
||||
|
||||
bat_priv->mcast.bridged = batadv_mcast_has_bridge(bat_priv);
|
||||
if (!bat_priv->mcast.bridged)
|
||||
bridged = batadv_mcast_has_bridge(bat_priv);
|
||||
if (!bridged)
|
||||
goto update;
|
||||
|
||||
#if !IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
|
||||
|
@ -385,8 +503,19 @@ static bool batadv_mcast_mla_tvlv_update(struct batadv_priv *bat_priv)
|
|||
mcast_data.flags |= BATADV_MCAST_WANT_ALL_IPV6;
|
||||
|
||||
update:
|
||||
batadv_mcast_bridge_log(bat_priv, bridged, &querier4, &querier6);
|
||||
|
||||
bat_priv->mcast.querier_ipv4.exists = querier4.exists;
|
||||
bat_priv->mcast.querier_ipv4.shadowing = querier4.shadowing;
|
||||
|
||||
bat_priv->mcast.querier_ipv6.exists = querier6.exists;
|
||||
bat_priv->mcast.querier_ipv6.shadowing = querier6.shadowing;
|
||||
|
||||
bat_priv->mcast.bridged = bridged;
|
||||
|
||||
if (!bat_priv->mcast.enabled ||
|
||||
mcast_data.flags != bat_priv->mcast.flags) {
|
||||
batadv_mcast_flags_log(bat_priv, mcast_data.flags);
|
||||
batadv_tvlv_container_register(bat_priv, BATADV_TVLV_MCAST, 2,
|
||||
&mcast_data, sizeof(mcast_data));
|
||||
bat_priv->mcast.flags = mcast_data.flags;
|
||||
|
|
|
@ -808,6 +808,10 @@ static int batadv_softif_init_late(struct net_device *dev)
|
|||
atomic_set(&bat_priv->distributed_arp_table, 1);
|
||||
#endif
|
||||
#ifdef CONFIG_BATMAN_ADV_MCAST
|
||||
bat_priv->mcast.querier_ipv4.exists = false;
|
||||
bat_priv->mcast.querier_ipv4.shadowing = false;
|
||||
bat_priv->mcast.querier_ipv6.exists = false;
|
||||
bat_priv->mcast.querier_ipv6.shadowing = false;
|
||||
bat_priv->mcast.flags = BATADV_NO_FLAGS;
|
||||
atomic_set(&bat_priv->multicast_mode, 1);
|
||||
atomic_set(&bat_priv->mcast.num_disabled, 0);
|
||||
|
|
|
@ -772,6 +772,8 @@ struct batadv_mcast_querier_state {
|
|||
* multicast traffic
|
||||
* @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast traffic
|
||||
* @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast traffic
|
||||
* @querier_ipv4: the current state of an IGMP querier in the mesh
|
||||
* @querier_ipv6: the current state of an MLD querier in the mesh
|
||||
* @flags: the flags we have last sent in our mcast tvlv
|
||||
* @enabled: whether the multicast tvlv is currently enabled
|
||||
* @bridged: whether the soft interface has a bridge on top
|
||||
|
@ -787,6 +789,8 @@ struct batadv_priv_mcast {
|
|||
struct hlist_head want_all_unsnoopables_list;
|
||||
struct hlist_head want_all_ipv4_list;
|
||||
struct hlist_head want_all_ipv6_list;
|
||||
struct batadv_mcast_querier_state querier_ipv4;
|
||||
struct batadv_mcast_querier_state querier_ipv6;
|
||||
u8 flags;
|
||||
bool enabled;
|
||||
bool bridged;
|
||||
|
|
Loading…
Reference in a new issue