summaryrefslogtreecommitdiffstats
path: root/include/net/udp.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/udp.h')
-rw-r--r--include/net/udp.h39
1 files changed, 36 insertions, 3 deletions
diff --git a/include/net/udp.h b/include/net/udp.h
index f98abd2ce70..af41850f742 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -50,16 +50,49 @@ 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))));
+
+/**
+ * struct udp_table - UDP table
+ *
+ * @hash: hash table, sockets are hashed on (local port)
+ * @hash2: hash table, sockets are hashed on (local port, local address)
+ * @mask: number of slots in hash tables, minus 1
+ * @log: log2(number of slots in hash table)
+ */
struct udp_table {
- struct udp_hslot hash[UDP_HTABLE_SIZE];
+ struct udp_hslot *hash;
+ struct udp_hslot *hash2;
+ unsigned int mask;
+ unsigned int log;
};
extern struct udp_table udp_table;
-extern void udp_table_init(struct udp_table *);
-
+extern void udp_table_init(struct udp_table *, const char *);
+static inline struct udp_hslot *udp_hashslot(struct udp_table *table,
+ struct net *net, unsigned num)
+{
+ return &table->hash[udp_hashfn(net, num, table->mask)];
+}
+/*
+ * For secondary hash, net_hash_mix() is performed before calling
+ * udp_hashslot2(), this explains difference with udp_hashslot()
+ */
+static inline struct udp_hslot *udp_hashslot2(struct udp_table *table,
+ unsigned int hash)
+{
+ return &table->hash2[hash & table->mask];
+}
/* Note: this must match 'valbool' in sock_setsockopt */
#define UDP_CSUM_NOXMIT 1