X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=datapath%2Fdatapath.h;h=d28250a128006f259272285ffa0ebd7bf3f71104;hb=eb395f2ebf46888353e5966dd7969a1c49402334;hp=102b27f31f1af633d65bddd0333356297fe59425;hpb=064af42167bf4fc9aaea2702d80ce08074b889c0;p=sliver-openvswitch.git

diff --git a/datapath/datapath.h b/datapath/datapath.h
index 102b27f31..d28250a12 100644
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -1,3 +1,11 @@
+/*
+ * Copyright (c) 2009 Nicira Networks.
+ * Distributed under the terms of the GNU GPL version 2.
+ *
+ * Significant portions of this file may be copied from parts of the Linux
+ * kernel, by Linus Torvalds and others.
+ */
+
 /* Interface exported by openvswitch_mod. */
 
 #ifndef DATAPATH_H
@@ -6,38 +14,70 @@
 #include <asm/page.h>
 #include <linux/kernel.h>
 #include <linux/mutex.h>
-#include <linux/netlink.h>
 #include <linux/netdevice.h>
 #include <linux/workqueue.h>
 #include <linux/skbuff.h>
+#include <linux/version.h>
 #include "flow.h"
-#include "brc_sysfs.h"
-
-struct sk_buff;
+#include "dp_sysfs.h"
 
 /* Mask for the priority bits in a vlan header.  If we ever merge upstream
  * then this should go into include/linux/if_vlan.h. */
 #define VLAN_PCP_MASK 0xe000
 
-#define DP_MAX_PORTS 256
+#define DP_MAX_PORTS 1024
 #define DP_MAX_GROUPS 16
 
-#define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow*)))
+#define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct dp_bucket*)))
 #define DP_L2_SIZE (1 << DP_L2_BITS)
 #define DP_L2_SHIFT 0
 
-#define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow**)))
+#define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct dp_bucket**)))
 #define DP_L1_SIZE (1 << DP_L1_BITS)
 #define DP_L1_SHIFT DP_L2_BITS
 
+/* For 4 kB pages, this is 1,048,576 on 32-bit or 262,144 on 64-bit. */
 #define DP_MAX_BUCKETS (DP_L1_SIZE * DP_L2_SIZE)
 
+/**
+ * struct dp_table - flow table
+ * @n_buckets: number of buckets (a power of 2 between %DP_L1_SIZE and
+ * %DP_MAX_BUCKETS)
+ * @buckets: pointer to @n_buckets/%DP_L1_SIZE pointers to %DP_L1_SIZE pointers
+ * to buckets
+ * @hash_seed: random number used for flow hashing, to make the hash
+ * distribution harder to predict
+ * @rcu: RCU callback structure
+ *
+ * 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/%DP_L1_SIZE, 0 <= j <
+ * %DP_L1_SIZE).
+ */
 struct dp_table {
 	unsigned int n_buckets;
-	struct sw_flow ***flows[2];
+	struct dp_bucket ***buckets;
+	unsigned int hash_seed;
 	struct rcu_head rcu;
 };
 
+/**
+ * struct dp_bucket - single bucket within datapath flow table
+ * @rcu: RCU callback structure
+ * @n_flows: number of flows in @flows[] array
+ * @flows: array of @n_flows pointers to flows
+ *
+ * The expected number of flows per bucket is 1, but this allows for an
+ * arbitrary number of collisions.
+ */
+struct dp_bucket {
+	struct rcu_head rcu;
+	unsigned int n_flows;
+	struct sw_flow *flows[];
+};
+
 #define DP_N_QUEUES 2
 #define DP_MAX_QUEUE_LEN 100
 
@@ -58,9 +98,7 @@ struct datapath {
 	struct mutex mutex;
 	int dp_idx;
 
-#ifdef SUPPORT_SYSFS
 	struct kobject ifobj;
-#endif
 
 	int drop_frags;
 
@@ -88,24 +126,19 @@ struct net_bridge_port {
 	u16 port_no;
 	struct datapath	*dp;
 	struct net_device *dev;
-#ifdef SUPPORT_SYSFS
 	struct kobject kobj;
-#endif
+	char linkname[IFNAMSIZ];
 	struct list_head node;   /* Element in datapath.ports. */
 };
 
 extern struct notifier_block dp_device_notifier;
 extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
-extern int (*dp_add_dp_hook)(struct datapath *dp);
-extern int (*dp_del_dp_hook)(struct datapath *dp);
-extern int (*dp_add_if_hook)(struct net_bridge_port *p);
-extern int (*dp_del_if_hook)(struct net_bridge_port *p);
 
 /* Flow table. */
 struct dp_table *dp_table_create(unsigned int n_buckets);
 void dp_table_destroy(struct dp_table *, int free_flows);
 struct sw_flow *dp_table_lookup(struct dp_table *, const struct odp_flow_key *);
-struct sw_flow **dp_table_lookup_for_insert(struct dp_table *, const struct odp_flow_key *);
+int dp_table_insert(struct dp_table *, struct sw_flow *);
 int dp_table_delete(struct dp_table *, struct sw_flow *);
 int dp_table_expand(struct datapath *);
 int dp_table_flush(struct datapath *);
@@ -114,11 +147,9 @@ int dp_table_foreach(struct dp_table *table,
 		     void *aux);
 
 void dp_process_received_packet(struct sk_buff *, struct net_bridge_port *);
-int dp_del_port(struct net_bridge_port *, struct list_head *);
-int dp_output_port(struct datapath *, struct sk_buff *, int out_port,
-		   int ignore_no_fwd);
+int dp_del_port(struct net_bridge_port *);
 int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
-void dp_set_origin(struct datapath *, u16, struct sk_buff *);
+int dp_min_mtu(const struct datapath *dp);
 
 struct datapath *get_dp(int dp_idx);
 
@@ -136,4 +167,6 @@ static inline int skb_checksum_setup(struct sk_buff *skb)
 }
 #endif
 
+int vswitch_skb_checksum_setup(struct sk_buff *skb);
+
 #endif /* datapath.h */