autopath: Create the autopath action.

The newly created autopath action will be the way OpenFlow
interacts with the existing bonding infrastructure.

1 files changed, 47 insertions, 1 deletions

diff --git a/include/openflow/nicira-ext.h b/include/openflow/nicira-ext.h
index 663059f69..292a98738 100644
--- a/include/openflow/nicira-ext.h
+++ b/include/openflow/nicira-ext.h
@@ -223,7 +223,8 @@ enum nx_action_subtype {
     NXAST_REG_LOAD,             /* struct nx_action_reg_load */
     NXAST_NOTE,                 /* struct nx_action_note */
     NXAST_SET_TUNNEL64,         /* struct nx_action_set_tunnel64 */
-    NXAST_MULTIPATH             /* struct nx_action_multipath */
+    NXAST_MULTIPATH,            /* struct nx_action_multipath */
+    NXAST_AUTOPATH              /* struct nx_action_autopath */
 };
 
 /* Header for Nicira-defined actions. */
@@ -610,6 +611,51 @@ enum nx_mp_algorithm {
 #define NXFW_ALL NXFW_TUN_ID
 #define OVSFW_ALL (OFPFW_ALL | NXFW_ALL)
 
+/* Action structure for NXAST_AUTOPATH.
+ *
+ * This action performs the following steps in sequence:
+ *
+ *    1. Hashes the flow using an implementation-defined hash function.
+ *
+ *       The hashed fields' values are drawn from the current state of the
+ *       flow, including all modifications that have been made by actions up to
+ *       this point.
+ *
+ *    2. Selects an OpenFlow 'port'.
+ *
+ *       'port' is selected in an implementation-defined manner, taking into
+ *       account 'id' and the hash value calculated in step 1.
+ *
+ *       Generally a switch will have been configured with a set of ports that
+ *       may be chosen given 'id'.  The switch may take into account any number
+ *       of factors when choosing 'port' from its configured set.  Factors may
+ *       include carrier, load, and the results of configuration protocols such
+ *       as LACP.
+ *
+ *    3. Stores 'port' in dst[ofs:ofs+n_bits].
+ *
+ *       The format and semantics of 'dst' and 'ofs_nbits' are similar to those
+ *       for the NXAST_REG_LOAD action, except that 'dst' must be
+ *       NXM_NX_REG(idx) for 'idx' in the switch's supported range.
+ *
+ * The switch will reject actions in which ofs+n_bits is greater than the width
+ * of 'dst', with error type OFPET_BAD_ACTION, code OFPBAC_BAD_ARGUMENT.
+ */
+struct nx_action_autopath {
+    ovs_be16 type;              /* OFPAT_VENDOR. */
+    ovs_be16 len;               /* Length is 20. */
+    ovs_be32 vendor;            /* NX_VENDOR_ID. */
+    ovs_be16 subtype;           /* NXAST_MULTIPATH. */
+
+    /* Where to store the result. */
+    ovs_be16 ofs_nbits;         /* (ofs << 6) | (n_bits - 1). */
+    ovs_be32 dst;               /* Destination register. */
+
+    ovs_be32 id;                /* Autopath ID. */
+    ovs_be32 pad;
+};
+OFP_ASSERT(sizeof(struct nx_action_autopath) == 24);
+
 /* Flexible flow specifications (aka NXM = Nicira Extended Match).
  *
  * OpenFlow 1.0 has "struct ofp_match" for specifying flow matches.  This