mirror of
https://github.com/openvswitch/ovs
synced 2025-10-17 14:28:02 +00:00
806e39cfdf
This turned out to be less trouble than I expected. This builds successfully against 2.6.18 through 2.6.28. Justin has lightly tested it on a 2.6.27 kernel provided by Citrix.
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/* Interface exported by openvswitch_mod. */
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#ifndef DATAPATH_H
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#define DATAPATH_H 1
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#include <asm/page.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/netlink.h>
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#include <linux/netdevice.h>
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#include <linux/workqueue.h>
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#include <linux/skbuff.h>
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#include <linux/version.h>
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#include "flow.h"
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#include "brc_sysfs.h"
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struct sk_buff;
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/* Mask for the priority bits in a vlan header. If we ever merge upstream
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* then this should go into include/linux/if_vlan.h. */
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#define VLAN_PCP_MASK 0xe000
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#define DP_MAX_PORTS 256
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#define DP_MAX_GROUPS 16
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#define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow*)))
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#define DP_L2_SIZE (1 << DP_L2_BITS)
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#define DP_L2_SHIFT 0
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#define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow**)))
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#define DP_L1_SIZE (1 << DP_L1_BITS)
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#define DP_L1_SHIFT DP_L2_BITS
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#define DP_MAX_BUCKETS (DP_L1_SIZE * DP_L2_SIZE)
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struct dp_table {
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unsigned int n_buckets;
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struct sw_flow ***flows[2];
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struct rcu_head rcu;
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};
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#define DP_N_QUEUES 2
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#define DP_MAX_QUEUE_LEN 100
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struct dp_stats_percpu {
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u64 n_frags;
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u64 n_hit;
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u64 n_missed;
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u64 n_lost;
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};
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struct dp_port_group {
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struct rcu_head rcu;
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int n_ports;
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u16 ports[];
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};
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struct datapath {
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struct mutex mutex;
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int dp_idx;
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#ifdef CONFIG_SYSFS
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
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struct kobject ifobj;
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#else
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struct kobject *ifobj;
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#endif
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#endif
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int drop_frags;
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/* Queued data. */
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struct sk_buff_head queues[DP_N_QUEUES];
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wait_queue_head_t waitqueue;
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/* Flow table. */
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unsigned int n_flows;
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struct dp_table *table;
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/* Port groups. */
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struct dp_port_group *groups[DP_MAX_GROUPS];
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/* Switch ports. */
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unsigned int n_ports;
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struct net_bridge_port *ports[DP_MAX_PORTS];
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struct list_head port_list; /* All ports, including local_port. */
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/* Stats. */
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struct dp_stats_percpu *stats_percpu;
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};
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struct net_bridge_port {
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u16 port_no;
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struct datapath *dp;
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struct net_device *dev;
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#ifdef CONFIG_SYSFS
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struct kobject kobj;
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#endif
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struct list_head node; /* Element in datapath.ports. */
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};
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extern struct notifier_block dp_device_notifier;
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extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
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extern int (*dp_add_dp_hook)(struct datapath *dp);
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extern int (*dp_del_dp_hook)(struct datapath *dp);
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extern int (*dp_add_if_hook)(struct net_bridge_port *p);
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extern int (*dp_del_if_hook)(struct net_bridge_port *p);
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/* Flow table. */
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struct dp_table *dp_table_create(unsigned int n_buckets);
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void dp_table_destroy(struct dp_table *, int free_flows);
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struct sw_flow *dp_table_lookup(struct dp_table *, const struct odp_flow_key *);
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struct sw_flow **dp_table_lookup_for_insert(struct dp_table *, const struct odp_flow_key *);
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int dp_table_delete(struct dp_table *, struct sw_flow *);
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int dp_table_expand(struct datapath *);
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int dp_table_flush(struct datapath *);
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int dp_table_foreach(struct dp_table *table,
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int (*callback)(struct sw_flow *flow, void *aux),
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void *aux);
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void dp_process_received_packet(struct sk_buff *, struct net_bridge_port *);
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int dp_del_port(struct net_bridge_port *, struct list_head *);
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int dp_output_port(struct datapath *, struct sk_buff *, int out_port,
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int ignore_no_fwd);
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int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
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void dp_set_origin(struct datapath *, u16, struct sk_buff *);
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struct datapath *get_dp(int dp_idx);
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static inline const char *dp_name(const struct datapath *dp)
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{
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return dp->ports[ODPP_LOCAL]->dev->name;
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}
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#ifdef CONFIG_XEN
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int skb_checksum_setup(struct sk_buff *skb);
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#else
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static inline int skb_checksum_setup(struct sk_buff *skb)
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{
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return 0;
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}
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#endif
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#endif /* datapath.h */
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