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authorEric Dumazet <eric.dumazet@gmail.com>2009-11-08 10:17:05 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-08 20:53:04 -0800
commitfdcc8aa953a1123a289791dd192090651036d593 (patch)
treeb30e27d1ba4d3330e5eb9b7da43d4dfb3a4e42f8 /include/net/udp.h
parent415ce61aef5e9b2ed2516a13888c733bea15aedf (diff)
downloadlinux-fdcc8aa953a1123a289791dd192090651036d593.tar.bz2
udp: add a counter into udp_hslot
Adds a counter in udp_hslot to keep an accurate count of sockets present in chain. This will permit to upcoming UDP lookup algo to chose the shortest chain when secondary hash is added. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/udp.h')
-rw-r--r--include/net/udp.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/udp.h b/include/net/udp.h
index 22aa2e7eb1d7..9167281e47dc 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -50,8 +50,16 @@ struct udp_skb_cb {
};
#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
+/**
+ * struct udp_hslot - UDP hash slot
+ *
+ * @head: head of list of sockets
+ * @count: number of sockets in 'head' list
+ * @lock: spinlock protecting changes to head/count
+ */
struct udp_hslot {
struct hlist_nulls_head head;
+ int count;
spinlock_t lock;
} __attribute__((aligned(2 * sizeof(long))));