/*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 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
#define DP_N_QUEUES 3
#define DP_MAX_QUEUE_LEN 100
+/**
+ * struct dp_stats_percpu - per-cpu packet processing statistics for a given
+ * datapath.
+ * @n_frags: Number of IP fragments processed by datapath.
+ * @n_hit: Number of received packets for which a matching flow was found in
+ * the flow table.
+ * @n_miss: Number of received packets that had no matching flow in the flow
+ * table. The sum of @n_hit and @n_miss is the number of packets that have
+ * been received by the datapath.
+ * @n_lost: Number of received packets that had no matching flow in the flow
+ * table that could not be sent to userspace (normally due to an overflow in
+ * one of the datapath's queues).
+ */
struct dp_stats_percpu {
u64 n_frags;
u64 n_hit;
u64 n_missed;
u64 n_lost;
- u64 sflow_pool; /* Packets that could have been sampled. */
};
struct dp_port_group {
* 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: &struct kobject representing the datapath.
+ * @ifobj: Represents /sys/class/net/<devname>/brif.
* @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.
* always exists, other ports may be %NULL.
* @port_list: List of all ports in @ports in arbitrary order.
* @stats_percpu: Per-CPU datapath statistics.
- * @sflow_probability: Probability of sampling a packet to the %ODPL_SFLOW
- * queue, where 0 means never sample, UINT_MAX means always sample, and
- * other values are intermediate probabilities.
+ * @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.
*/
struct datapath {
struct mutex mutex;
unsigned int sflow_probability;
};
+/**
+ * struct net_bridge_port - one port within a datapath
+ * @port_no: Index into @dp's @ports array.
+ * @dp: Datapath to which this port belongs.
+ * @dev: The network device attached to this port. The @br_port member in @dev
+ * points back to this &struct net_bridge_port.
+ * @kobj: Represents /sys/class/net/<devname>/brport.
+ * @linkname: The name of the link from /sys/class/net/<datapath>/brif to this
+ * &struct net_bridge_port. (We keep this around so that we can delete it
+ * if @dev 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 net_bridge_port {
u16 port_no;
struct datapath *dp;
struct net_device *dev;
struct kobject kobj;
char linkname[IFNAMSIZ];
- struct list_head node; /* Element in datapath.ports. */
+ 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
+ * @ip_summed: Consistently stores L4 checksumming status across different
+ * kernel versions.
+ */
+struct ovs_skb_cb {
+ enum csum_type ip_summed;
+};
+#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb)
+
extern struct notifier_block dp_device_notifier;
extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd);
int dp_del_port(struct net_bridge_port *);
int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg);
int dp_min_mtu(const struct datapath *dp);
+void set_dp_devs_mtu(const struct datapath *dp, struct net_device *dev);
struct datapath *get_dp(int dp_idx);
return dp->ports[ODPP_LOCAL]->dev->name;
}
-#ifdef CONFIG_XEN
-int skb_checksum_setup(struct sk_buff *skb);
+#if defined(CONFIG_XEN) && defined(HAVE_PROTO_DATA_VALID)
+int vswitch_skb_checksum_setup(struct sk_buff *skb);
#else
-static inline int skb_checksum_setup(struct sk_buff *skb)
+static inline int vswitch_skb_checksum_setup(struct sk_buff *skb)
{
return 0;
}
#endif
-int vswitch_skb_checksum_setup(struct sk_buff *skb);
+void compute_ip_summed(struct sk_buff *skb, bool xmit);
+void forward_ip_summed(struct sk_buff *skb);
#endif /* datapath.h */