llc: use a device based hash table to speed up multicast delivery

This patch adds a per SAP device based hash table to solve the
multicast delivery scalability issue when we have large number of
interfaces and a large number of sockets bound to the same SAP.

Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/net/llc_conn.h b/include/net/llc_conn.h
index fe982fd94c4a..2f97d8ddce92 100644
--- a/include/net/llc_conn.h
+++ b/include/net/llc_conn.h
@@ -77,6 +77,7 @@ struct llc_sock {
                                               received and caused sending FRMR.
                                               Used for resending FRMR */
         u32                 cmsg_flags;
+        struct hlist_node   dev_hash_node;
 };
 
 static inline struct llc_sock *llc_sk(const struct sock *sk)