nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 43 insertions, 9 deletions

diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h
index c1105c147531..031dfbf37c93 100644
--- a/net/openvswitch/datapath.h
+++ b/net/openvswitch/datapath.h
@@ -27,10 +27,11 @@
 #include <linux/u64_stats_sync.h>
 
 #include "flow.h"
+#include "vport.h"
 
-struct vport;
+#define DP_MAX_PORTS           USHRT_MAX
+#define DP_VPORT_HASH_BUCKETS  1024
 
-#define DP_MAX_PORTS 1024
 #define SAMPLE_ACTION_DEPTH 3
 
 /**
@@ -58,11 +59,10 @@ struct dp_stats_percpu {
  * @list_node: Element in global 'dps' list.
  * @n_flows: Number of flows currently in flow table.
  * @table: Current flow table.  Protected by genl_lock and RCU.
- * @ports: Map from port number to &struct vport.  %OVSP_LOCAL port
- * always exists, other ports may be %NULL.  Protected by RTNL and RCU.
- * @port_list: List of all ports in @ports in arbitrary order.  RTNL required
- * to iterate or modify.
+ * @ports: Hash table for ports.  %OVSP_LOCAL port always exists.  Protected by
+ * RTNL and RCU.
  * @stats_percpu: Per-CPU datapath statistics.
+ * @net: Reference to net namespace.
  *
  * Context: See the comment on locking at the top of datapath.c for additional
  * locking information.
@@ -75,13 +75,37 @@ struct datapath {
 	struct flow_table __rcu *table;
 
 	/* Switch ports. */
-	struct vport __rcu *ports[DP_MAX_PORTS];
-	struct list_head port_list;
+	struct hlist_head *ports;
 
 	/* Stats. */
 	struct dp_stats_percpu __percpu *stats_percpu;
+
+#ifdef CONFIG_NET_NS
+	/* Network namespace ref. */
+	struct net *net;
+#endif
 };
 
+struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no);
+
+static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no)
+{
+	WARN_ON_ONCE(!rcu_read_lock_held());
+	return ovs_lookup_vport(dp, port_no);
+}
+
+static inline struct vport *ovs_vport_rtnl_rcu(const struct datapath *dp, int port_no)
+{
+	WARN_ON_ONCE(!rcu_read_lock_held() && !rtnl_is_locked());
+	return ovs_lookup_vport(dp, port_no);
+}
+
+static inline struct vport *ovs_vport_rtnl(const struct datapath *dp, int port_no)
+{
+	ASSERT_RTNL();
+	return ovs_lookup_vport(dp, port_no);
+}
+
 /**
  * struct ovs_skb_cb - OVS data in skb CB
  * @flow: The flow associated with this packet.  May be %NULL if no flow.
@@ -105,9 +129,19 @@ struct dp_upcall_info {
 	u8 cmd;
 	const struct sw_flow_key *key;
 	const struct nlattr *userdata;
-	u32 pid;
+	u32 portid;
 };
 
+static inline struct net *ovs_dp_get_net(struct datapath *dp)
+{
+	return read_pnet(&dp->net);
+}
+
+static inline void ovs_dp_set_net(struct datapath *dp, struct net *net)
+{
+	write_pnet(&dp->net, net);
+}
+
 extern struct notifier_block ovs_dp_device_notifier;
 extern struct genl_multicast_group ovs_dp_vport_multicast_group;