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

[deliverable/linux.git] / include / net / llc.h

diff --git a/include/net/llc.h b/include/net/llc.h
index 1559cf10e8747acb3bbb87806db80a5b4076292d..dbef5917905be5eb38116d1e88000a857900be07 100644 (file)
--- a/include/net/llc.h
+++ b/include/net/llc.h
@@ -32,6 +32,9 @@ struct llc_addr {
 #define LLC_SAP_STATE_INACTIVE 1
 #define LLC_SAP_STATE_ACTIVE   2
 
+#define LLC_SK_DEV_HASH_BITS 6
+#define LLC_SK_DEV_HASH_ENTRIES (1<<LLC_SK_DEV_HASH_BITS)
+
 /**
  * struct llc_sap - Defines the SAP component
  *
@@ -56,8 +59,16 @@ struct llc_sap {
        struct list_head node;
        spinlock_t sk_lock;
        struct hlist_nulls_head sk_list;
+       struct hlist_head sk_dev_hash[LLC_SK_DEV_HASH_ENTRIES];
 };
 
+static inline
+struct hlist_head *llc_sk_dev_hash(struct llc_sap *sap, int ifindex)
+{
+       return &sap->sk_dev_hash[ifindex % LLC_SK_DEV_HASH_ENTRIES];
+}
+
+
 #define LLC_DEST_INVALID         0      /* Invalid LLC PDU type */
 #define LLC_DEST_SAP             1      /* Type 1 goes here */
 #define LLC_DEST_CONN            2      /* Type 2 goes here */