/*
- * Copyright (c) 2009, 2010 Nicira Networks.
+ * Copyright (c) 2009, 2010, 2011 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
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
-#include <linux/workqueue.h>
#include <linux/seqlock.h>
#include <linux/skbuff.h>
#include <linux/version.h>
+
+#include "checksum.h"
#include "flow.h"
#include "dp_sysfs.h"
struct vport;
-struct dp_port;
/* 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 DP_MAX_PORTS 1024
-#define DP_N_QUEUES 3
-#define DP_MAX_QUEUE_LEN 100
-
/**
* struct dp_stats_percpu - per-cpu packet processing statistics for a given
* datapath.
/**
* struct datapath - datapath for flow-based packet switching
- * @mutex: Mutual exclusion for ioctls.
- * @dp_idx: Datapath number (index into the dps[] array in datapath.c).
- * @ifobj: Represents /sys/class/net/<devname>/brif.
+ * @rcu: RCU callback head for deferred destruction.
+ * @dp_ifindex: ifindex of local port.
+ * @list_node: Element in global 'dps' list.
+ * @ifobj: Represents /sys/class/net/<devname>/brif. Protected by RTNL.
* @drop_frags: Drop all IP fragments if nonzero.
- * @queues: %DP_N_QUEUES sets of queued packets for userspace to handle.
- * @waitqueue: Waitqueue, for waiting for new packets in @queues.
* @n_flows: Number of flows currently in flow table.
- * @table: Current flow table (RCU protected).
- * @n_ports: Number of ports currently in @ports.
- * @ports: Map from port number to &struct dp_port. %ODPP_LOCAL port
- * always exists, other ports may be %NULL.
- * @port_list: List of all ports in @ports in arbitrary order.
+ * @table: Current flow table. Protected by genl_lock and RCU.
+ * @ports: Map from port number to &struct vport. %ODPP_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.
* @stats_percpu: Per-CPU datapath statistics.
* @sflow_probability: Number of packets out of UINT_MAX to sample to the
- * %ODPL_SFLOW queue, e.g. (@sflow_probability/UINT_MAX) is the probability of
- * sampling a given packet.
+ * %ODP_PACKET_CMD_SAMPLE multicast group, e.g. (@sflow_probability/UINT_MAX)
+ * is the probability of sampling a given packet.
+ *
+ * Context: See the comment on locking at the top of datapath.c for additional
+ * locking information.
*/
struct datapath {
- struct mutex mutex;
- int dp_idx;
+ struct rcu_head rcu;
+ int dp_ifindex;
+ struct list_head list_node;
struct kobject ifobj;
int drop_frags;
- /* Queued data. */
- struct sk_buff_head queues[DP_N_QUEUES];
- wait_queue_head_t waitqueue;
-
/* Flow table. */
- struct tbl *table;
+ struct tbl __rcu *table;
/* Switch ports. */
- unsigned int n_ports;
- struct dp_port *ports[DP_MAX_PORTS];
+ struct vport __rcu *ports[DP_MAX_PORTS];
struct list_head port_list;
/* Stats. */
- struct dp_stats_percpu *stats_percpu;
+ struct dp_stats_percpu __percpu *stats_percpu;
/* sFlow Sampling */
unsigned int sflow_probability;
};
-/**
- * struct dp_port - one port within a datapath
- * @port_no: Index into @dp's @ports array.
- * @dp: Datapath to which this port belongs.
- * @vport: The network device attached to this port. The contents depends on
- * the device and should be accessed only through the vport_* functions.
- * @kobj: Represents /sys/class/net/<devname>/brport.
- * @linkname: The name of the link from /sys/class/net/<datapath>/brif to this
- * &struct dp_port. (We keep this around so that we can delete it if the
- * device gets renamed.) Set to the null string when no link exists.
- * @node: Element in @dp's @port_list.
- * @sflow_pool: Number of packets that were candidates for sFlow sampling,
- * regardless of whether they were actually chosen and sent down to userspace.
- */
-struct dp_port {
- u16 port_no;
- struct datapath *dp;
- struct vport *vport;
- struct kobject kobj;
- char linkname[IFNAMSIZ];
- struct list_head node;
- atomic_t sflow_pool;
-};
-
-enum csum_type {
- OVS_CSUM_NONE = 0,
- OVS_CSUM_UNNECESSARY = 1,
- OVS_CSUM_COMPLETE = 2,
- OVS_CSUM_PARTIAL = 3,
-};
-
/**
* struct ovs_skb_cb - OVS data in skb CB
- * @dp_port: The datapath port on which the skb entered the switch.
+ * @vport: The datapath port on which the skb entered the switch.
* @flow: The flow associated with this packet. May be %NULL if no flow.
* @ip_summed: Consistently stores L4 checksumming status across different
* kernel versions.
- * @tun_id: ID (in network byte order) of the tunnel that encapsulated this
- * packet. It is 0 if the packet was not received on a tunnel.
+ * @tun_id: ID of the tunnel that encapsulated this packet. It is 0 if the
+ * packet was not received on a tunnel.
*/
struct ovs_skb_cb {
- struct dp_port *dp_port;
+ struct vport *vport;
struct sw_flow *flow;
+#ifdef NEED_CSUM_NORMALIZE
enum csum_type ip_summed;
- __be32 tun_id;
+#endif
+ __be64 tun_id;
};
#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
+/**
+ * struct dp_upcall - metadata to include with a packet to send to userspace
+ * @cmd: One of %ODP_PACKET_CMD_*.
+ * @key: Becomes %ODP_PACKET_ATTR_KEY. Must be nonnull.
+ * @userdata: Becomes %ODP_PACKET_ATTR_USERDATA if nonzero.
+ * @sample_pool: Becomes %ODP_PACKET_ATTR_SAMPLE_POOL if nonzero.
+ * @actions: Becomes %ODP_PACKET_ATTR_ACTIONS if nonnull.
+ * @actions_len: Number of bytes in @actions.
+*/
+struct dp_upcall_info {
+ u8 cmd;
+ const struct sw_flow_key *key;
+ u64 userdata;
+ u32 sample_pool;
+ const struct nlattr *actions;
+ u32 actions_len;
+};
+
extern struct notifier_block dp_device_notifier;
extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
-void dp_process_received_packet(struct dp_port *, struct sk_buff *);
-int dp_detach_port(struct dp_port *, int may_delete);
-int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
+void dp_process_received_packet(struct vport *, struct sk_buff *);
+int dp_detach_port(struct vport *);
+int dp_upcall(struct datapath *, struct sk_buff *, const struct dp_upcall_info *);
int dp_min_mtu(const struct datapath *dp);
void set_internal_devs_mtu(const struct datapath *dp);
struct datapath *get_dp(int dp_idx);
const char *dp_name(const struct datapath *dp);
-#if defined(CONFIG_XEN) && defined(HAVE_PROTO_DATA_VALID)
-int vswitch_skb_checksum_setup(struct sk_buff *skb);
-#else
-static inline int vswitch_skb_checksum_setup(struct sk_buff *skb)
-{
- return 0;
-}
-#endif
-
-void compute_ip_summed(struct sk_buff *skb, bool xmit);
-void forward_ip_summed(struct sk_buff *skb);
-
#endif /* datapath.h */