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diff --git a/datapath/table.h b/datapath/table.h
index 9ae1ee32..dac57476 100644
--- a/datapath/table.h
+++ b/datapath/table.h
@@ -9,13 +9,36 @@
 #ifndef TABLE_H
 #define TABLE_H 1
 
-struct tbl;
 struct tbl_bucket;
 
 struct tbl_node {
 	u32 hash;
 };
 
+/**
+ * struct tbl - hash table
+ * @n_buckets: number of buckets (a power of 2 between %TBL_L1_SIZE and
+ * %TBL_MAX_BUCKETS)
+ * @buckets: pointer to @n_buckets/%TBL_L1_SIZE pointers to %TBL_L1_SIZE pointers
+ * to buckets
+ * @rcu: RCU callback structure
+ * @obj_destructor: Called on each element when the table is destroyed.
+ *
+ * The @buckets array is logically an array of pointers to buckets.  It is
+ * broken into two levels to avoid the need to kmalloc() any object larger than
+ * a single page or to use vmalloc().  @buckets is always nonnull, as is each
+ * @buckets[i], but each @buckets[i][j] is nonnull only if the specified hash
+ * bucket is nonempty (for 0 <= i < @n_buckets/%TBL_L1_SIZE, 0 <= j <
+ * %TBL_L1_SIZE).
+ */
+struct tbl {
+	struct rcu_head rcu;
+	unsigned int n_buckets;
+	struct tbl_bucket ***buckets;
+	unsigned int count;
+	void (*obj_destructor)(struct tbl_node *);
+};
+
 #define TBL_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct tbl_bucket *)))
 #define TBL_L2_SIZE (1 << TBL_L2_BITS)
 #define TBL_L2_SHIFT 0