datapath: Change dp_idx to dp_ifindex, the ifindex of the local port.

[sliver-openvswitch.git] / datapath / datapath.h

diff --git a/datapath/datapath.h b/datapath/datapath.h
index 91c8e1e..befa55c 100644 (file)
--- a/datapath/datapath.h
+++ b/datapath/datapath.h
@@ -15,7 +15,6 @@
 #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>
@@ -33,9 +32,6 @@ struct vport;
 
 #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.
@@ -60,40 +56,36 @@ struct dp_stats_percpu {
 /**
  * struct datapath - datapath for flow-based packet switching
  * @rcu: RCU callback head for deferred destruction.
- * @mutex: Mutual exclusion for ioctls.
- * @dp_idx: Datapath number (index into the dps[] array in datapath.c).
- * @ifobj: Represents /sys/class/net/<devname>/brif.
+ * @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.
- * @n_ports: Number of ports currently in @ports.
+ * @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.
- * @port_list: List of all ports in @ports in arbitrary order.
+ * 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 rcu_head rcu;
-       struct mutex mutex;
-       int dp_idx;
+       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 __rcu *table;
 
        /* Switch ports. */
-       unsigned int n_ports;
        struct vport __rcu *ports[DP_MAX_PORTS];
        struct list_head port_list;
 
@@ -125,7 +117,7 @@ struct ovs_skb_cb {
 
 /**
  * struct dp_upcall - metadata to include with a packet to send to userspace
- * @type: One of %_ODPL_*_NR.
+ * @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.
@@ -133,7 +125,7 @@ struct ovs_skb_cb {
  * @actions_len: Number of bytes in @actions.
 */
 struct dp_upcall_info {
-       u32 type;
+       u8 cmd;
        const struct sw_flow_key *key;
        u64 userdata;
        u32 sample_pool;