openvswitch.h: Note that 64 bit ints are 4-aligned.

[sliver-openvswitch.git] / include / linux / openvswitch.h

diff --git a/include/linux/openvswitch.h b/include/linux/openvswitch.h
index e39e437..8e4b870 100644 (file)
--- a/include/linux/openvswitch.h
+++ b/include/linux/openvswitch.h
@@ -109,6 +109,7 @@ enum ovs_datapath_attr {
 
 #define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
 
+/* All 64-bit integers within Netlink messages are 4-byte aligned only. */
 struct ovs_dp_stats {
        __u64 n_hit;             /* Number of flow table matches. */
        __u64 n_missed;          /* Number of flow table misses. */
@@ -138,6 +139,9 @@ struct ovs_vport_stats {
 /* Allow last Netlink attribute to be unaligned */
 #define OVS_DP_F_UNALIGNED     (1 << 0)
 
+/* Allow datapath to associate multiple Netlink PIDs to each vport */
+#define OVS_DP_F_VPORT_PIDS    (1 << 1)
+
 /* Fixed logical ports. */
 #define OVSP_LOCAL      ((__u32)0)
 
@@ -225,9 +229,10 @@ enum ovs_vport_type {
  * this is the name of the network device.  Maximum length %IFNAMSIZ-1 bytes
  * plus a null terminator.
  * @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
- * @OVS_VPORT_ATTR_UPCALL_PID: The Netlink socket in userspace that
- * OVS_PACKET_CMD_MISS upcalls will be directed to for packets received on
- * this port.  A value of zero indicates that upcalls should not be sent.
+ * @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
+ * among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
+ * received on this port.  If this is a single-element array of value 0,
+ * upcalls should not be sent.
  * @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
  * packets sent or received through the vport.
  *
@@ -251,7 +256,8 @@ enum ovs_vport_attr {
        OVS_VPORT_ATTR_TYPE,    /* u32 OVS_VPORT_TYPE_* constant. */
        OVS_VPORT_ATTR_NAME,    /* string name, up to IFNAMSIZ bytes long */
        OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
-       OVS_VPORT_ATTR_UPCALL_PID, /* u32 Netlink PID to receive upcalls */
+       OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
+                               /* receiving upcalls */
        OVS_VPORT_ATTR_STATS,   /* struct ovs_vport_stats */
        __OVS_VPORT_ATTR_MAX
 };
@@ -307,10 +313,14 @@ enum ovs_key_attr {
        OVS_KEY_ATTR_TUNNEL,    /* Nested set of ovs_tunnel attributes */
        OVS_KEY_ATTR_SCTP,      /* struct ovs_key_sctp */
        OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
-
+       OVS_KEY_ATTR_DP_HASH,   /* u32 hash value. Value 0 indicates the hash
+                                  is not computed by the datapath. */
+       OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
 #ifdef __KERNEL__
+       /* Only used within kernel data path. */
        OVS_KEY_ATTR_IPV4_TUNNEL,  /* struct ovs_key_ipv4_tunnel */
 #endif
+       /* Experimental */
 
        OVS_KEY_ATTR_MPLS = 62, /* array of struct ovs_key_mpls.
                                 * The implementation may restrict
@@ -532,6 +542,26 @@ struct ovs_action_push_vlan {
        __be16 vlan_tci;        /* 802.1Q TCI (VLAN ID and priority). */
 };
 
+/* Data path hash algorithm for computing Datapath hash.
+ *
+ * The algorithm type only specifies the fields in a flow
+ * will be used as part of the hash. Each datapath is free
+ * to use its own hash algorithm. The hash value will be
+ * opaque to the user space daemon.
+ */
+enum ovs_hash_alg {
+       OVS_HASH_ALG_L4,
+};
+/*
+ * struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
+ * @hash_alg: Algorithm used to compute hash prior to recirculation.
+ * @hash_basis: basis used for computing hash.
+ */
+struct ovs_action_hash {
+       uint32_t  hash_alg;     /* One of ovs_hash_alg. */
+       uint32_t  hash_basis;
+};
+
 /**
  * enum ovs_action_attr - Action types.
  *
@@ -555,6 +585,7 @@ struct ovs_action_push_vlan {
  * indicate the new packet contents. This could potentially still be
  * %ETH_P_MPLS if the resulting MPLS label stack is not empty.  If there
  * is no MPLS label stack, as determined by ethertype, no action is taken.
+ * @OVS_ACTION_RECIRC: Recirculate within the data path.
  *
  * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
  * fields within a header are modifiable, e.g. the IPv4 protocol and fragment
@@ -571,6 +602,8 @@ enum ovs_action_attr {
        OVS_ACTION_ATTR_SAMPLE,       /* Nested OVS_SAMPLE_ATTR_*. */
        OVS_ACTION_ATTR_PUSH_MPLS,    /* struct ovs_action_push_mpls. */
        OVS_ACTION_ATTR_POP_MPLS,     /* __be16 ethertype. */
+       OVS_ACTION_ATTR_RECIRC,       /* u32 recirc_id. */
+       OVS_ACTION_ATTR_HASH,         /* struct ovs_action_hash. */
        __OVS_ACTION_ATTR_MAX
 };