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openvswitch: Increase maximum number of datapath ports.

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Use hash table to store ports of datapath. Allow 64K ports per switch.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Pravin B Shelar 2012-08-23 12:40:54 -07:00 • committed by Jesse Gross
parent 46df7b8145
commit 15eac2a742
7 changed files with 111 additions and 49 deletions
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33
net/openvswitch/datapath.h
View file

@ -29,7 +29,9 @@
#include "flow.h"
#include "vport.h"
#define DP_MAX_PORTS 1024
#define DP_MAX_PORTS USHRT_MAX
#define DP_VPORT_HASH_BUCKETS 1024
#define SAMPLE_ACTION_DEPTH 3
/**
@ -57,10 +59,8 @@ 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.
*
@ -75,8 +75,7 @@ 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;
@ -87,6 +86,26 @@ struct datapath {
#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.