summaryrefslogtreecommitdiff
path: root/net/batman-adv/multicast.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/batman-adv/multicast.c')
-rw-r--r--net/batman-adv/multicast.c251
1 files changed, 15 insertions, 236 deletions
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index b238455913df..315394f12c55 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -26,7 +26,6 @@
#include <linux/ipv6.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
-#include <linux/kref.h>
#include <linux/list.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
@@ -1137,222 +1136,19 @@ static int batadv_mcast_forw_rtr_count(struct batadv_priv *bat_priv,
}
/**
- * batadv_mcast_forw_tt_node_get() - get a multicast tt node
- * @bat_priv: the bat priv with all the soft interface information
- * @ethhdr: the ether header containing the multicast destination
- *
- * Return: an orig_node matching the multicast address provided by ethhdr
- * via a translation table lookup. This increases the returned nodes refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_tt_node_get(struct batadv_priv *bat_priv,
- struct ethhdr *ethhdr)
-{
- return batadv_transtable_search(bat_priv, NULL, ethhdr->h_dest,
- BATADV_NO_FLAGS);
-}
-
-/**
- * batadv_mcast_forw_ipv4_node_get() - get a node with an ipv4 flag
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 flag set and
- * increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_ipv4_node_get(struct batadv_priv *bat_priv)
-{
- struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tmp_orig_node,
- &bat_priv->mcast.want_all_ipv4_list,
- mcast_want_all_ipv4_node) {
- if (!kref_get_unless_zero(&tmp_orig_node->refcount))
- continue;
-
- orig_node = tmp_orig_node;
- break;
- }
- rcu_read_unlock();
-
- return orig_node;
-}
-
-/**
- * batadv_mcast_forw_ipv6_node_get() - get a node with an ipv6 flag
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV6 flag set
- * and increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_ipv6_node_get(struct batadv_priv *bat_priv)
-{
- struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tmp_orig_node,
- &bat_priv->mcast.want_all_ipv6_list,
- mcast_want_all_ipv6_node) {
- if (!kref_get_unless_zero(&tmp_orig_node->refcount))
- continue;
-
- orig_node = tmp_orig_node;
- break;
- }
- rcu_read_unlock();
-
- return orig_node;
-}
-
-/**
- * batadv_mcast_forw_ip_node_get() - get a node with an ipv4/ipv6 flag
- * @bat_priv: the bat priv with all the soft interface information
- * @ethhdr: an ethernet header to determine the protocol family from
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 or
- * BATADV_MCAST_WANT_ALL_IPV6 flag, depending on the provided ethhdr, sets and
- * increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_ip_node_get(struct batadv_priv *bat_priv,
- struct ethhdr *ethhdr)
-{
- switch (ntohs(ethhdr->h_proto)) {
- case ETH_P_IP:
- return batadv_mcast_forw_ipv4_node_get(bat_priv);
- case ETH_P_IPV6:
- return batadv_mcast_forw_ipv6_node_get(bat_priv);
- default:
- /* we shouldn't be here... */
- return NULL;
- }
-}
-
-/**
- * batadv_mcast_forw_unsnoop_node_get() - get a node with an unsnoopable flag
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_ALL_UNSNOOPABLES flag
- * set and increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_unsnoop_node_get(struct batadv_priv *bat_priv)
-{
- struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tmp_orig_node,
- &bat_priv->mcast.want_all_unsnoopables_list,
- mcast_want_all_unsnoopables_node) {
- if (!kref_get_unless_zero(&tmp_orig_node->refcount))
- continue;
-
- orig_node = tmp_orig_node;
- break;
- }
- rcu_read_unlock();
-
- return orig_node;
-}
-
-/**
- * batadv_mcast_forw_rtr4_node_get() - get a node with an ipv4 mcast router flag
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_NO_RTR4 flag unset and
- * increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_rtr4_node_get(struct batadv_priv *bat_priv)
-{
- struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tmp_orig_node,
- &bat_priv->mcast.want_all_rtr4_list,
- mcast_want_all_rtr4_node) {
- if (!kref_get_unless_zero(&tmp_orig_node->refcount))
- continue;
-
- orig_node = tmp_orig_node;
- break;
- }
- rcu_read_unlock();
-
- return orig_node;
-}
-
-/**
- * batadv_mcast_forw_rtr6_node_get() - get a node with an ipv6 mcast router flag
- * @bat_priv: the bat priv with all the soft interface information
- *
- * Return: an orig_node which has the BATADV_MCAST_WANT_NO_RTR6 flag unset
- * and increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_rtr6_node_get(struct batadv_priv *bat_priv)
-{
- struct batadv_orig_node *tmp_orig_node, *orig_node = NULL;
-
- rcu_read_lock();
- hlist_for_each_entry_rcu(tmp_orig_node,
- &bat_priv->mcast.want_all_rtr6_list,
- mcast_want_all_rtr6_node) {
- if (!kref_get_unless_zero(&tmp_orig_node->refcount))
- continue;
-
- orig_node = tmp_orig_node;
- break;
- }
- rcu_read_unlock();
-
- return orig_node;
-}
-
-/**
- * batadv_mcast_forw_rtr_node_get() - get a node with an ipv4/ipv6 router flag
- * @bat_priv: the bat priv with all the soft interface information
- * @ethhdr: an ethernet header to determine the protocol family from
- *
- * Return: an orig_node which has no BATADV_MCAST_WANT_NO_RTR4 or
- * BATADV_MCAST_WANT_NO_RTR6 flag, depending on the provided ethhdr, set and
- * increases its refcount.
- */
-static struct batadv_orig_node *
-batadv_mcast_forw_rtr_node_get(struct batadv_priv *bat_priv,
- struct ethhdr *ethhdr)
-{
- switch (ntohs(ethhdr->h_proto)) {
- case ETH_P_IP:
- return batadv_mcast_forw_rtr4_node_get(bat_priv);
- case ETH_P_IPV6:
- return batadv_mcast_forw_rtr6_node_get(bat_priv);
- default:
- /* we shouldn't be here... */
- return NULL;
- }
-}
-
-/**
* batadv_mcast_forw_mode() - check on how to forward a multicast packet
* @bat_priv: the bat priv with all the soft interface information
- * @skb: The multicast packet to check
- * @orig: an originator to be set to forward the skb to
+ * @skb: the multicast packet to check
* @is_routable: stores whether the destination is routable
*
- * Return: the forwarding mode as enum batadv_forw_mode and in case of
- * BATADV_FORW_SINGLE set the orig to the single originator the skb
- * should be forwarded to.
+ * Return: The forwarding mode as enum batadv_forw_mode.
*/
enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
- struct batadv_orig_node **orig, int *is_routable)
+ int *is_routable)
{
int ret, tt_count, ip_count, unsnoop_count, total_count;
bool is_unsnoopable = false;
- unsigned int mcast_fanout;
struct ethhdr *ethhdr;
int rtr_count = 0;
@@ -1361,7 +1157,7 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
if (ret == -ENOMEM)
return BATADV_FORW_NONE;
else if (ret < 0)
- return BATADV_FORW_ALL;
+ return BATADV_FORW_BCAST;
ethhdr = eth_hdr(skb);
@@ -1374,32 +1170,15 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
total_count = tt_count + ip_count + unsnoop_count + rtr_count;
- switch (total_count) {
- case 1:
- if (tt_count)
- *orig = batadv_mcast_forw_tt_node_get(bat_priv, ethhdr);
- else if (ip_count)
- *orig = batadv_mcast_forw_ip_node_get(bat_priv, ethhdr);
- else if (unsnoop_count)
- *orig = batadv_mcast_forw_unsnoop_node_get(bat_priv);
- else if (rtr_count)
- *orig = batadv_mcast_forw_rtr_node_get(bat_priv,
- ethhdr);
-
- if (*orig)
- return BATADV_FORW_SINGLE;
-
- fallthrough;
- case 0:
+ if (!total_count)
return BATADV_FORW_NONE;
- default:
- mcast_fanout = atomic_read(&bat_priv->multicast_fanout);
+ else if (unsnoop_count)
+ return BATADV_FORW_BCAST;
- if (!unsnoop_count && total_count <= mcast_fanout)
- return BATADV_FORW_SOME;
- }
+ if (total_count <= atomic_read(&bat_priv->multicast_fanout))
+ return BATADV_FORW_UCASTS;
- return BATADV_FORW_ALL;
+ return BATADV_FORW_BCAST;
}
/**
@@ -1411,10 +1190,10 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
*
* Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
*/
-int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
- struct sk_buff *skb,
- unsigned short vid,
- struct batadv_orig_node *orig_node)
+static int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned short vid,
+ struct batadv_orig_node *orig_node)
{
/* Avoid sending multicast-in-unicast packets to other BLA
* gateways - they already got the frame from the LAN side
@@ -2039,7 +1818,7 @@ static void batadv_mcast_tvlv_ogm_handler(struct batadv_priv *bat_priv,
void batadv_mcast_init(struct batadv_priv *bat_priv)
{
batadv_tvlv_handler_register(bat_priv, batadv_mcast_tvlv_ogm_handler,
- NULL, BATADV_TVLV_MCAST, 2,
+ NULL, NULL, BATADV_TVLV_MCAST, 2,
BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
INIT_DELAYED_WORK(&bat_priv->mcast.work, batadv_mcast_mla_update);