X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fopenflow%2Fnicira-ext.h;h=c97478faf3bc337d7649aff8cfb97cfdc7425ee5;hb=9c64f2384d850658985d7e18003443c196e89ae1;hp=5ec009a767df6f2653f6b65222cfcc75b30c27ba;hpb=659586efcf6f9539282da9447007897907c41112;p=sliver-openvswitch.git

diff --git a/include/openflow/nicira-ext.h b/include/openflow/nicira-ext.h
index 5ec009a76..c97478faf 100644
--- a/include/openflow/nicira-ext.h
+++ b/include/openflow/nicira-ext.h
@@ -49,6 +49,11 @@ enum nicira_type {
     /* Use the high 32 bits of the cookie field as the tunnel ID in the flow
      * match. */
     NXT_TUN_ID_FROM_COOKIE,
+
+    /* Controller role support.  The request body is struct nx_role_request.
+     * The reply echos the request. */
+    NXT_ROLE_REQUEST,
+    NXT_ROLE_REPLY
 };
 
 struct nicira_header {
@@ -67,6 +72,36 @@ struct nxt_tun_id_cookie {
 };
 OFP_ASSERT(sizeof(struct nxt_tun_id_cookie) == 24);
 
+/* Configures the "role" of the sending controller.  The default role is:
+ *
+ *    - Other (NX_ROLE_OTHER), which allows the controller access to all
+ *      OpenFlow features.
+ *
+ * The other possible roles are a related pair:
+ *
+ *    - Master (NX_ROLE_MASTER) is equivalent to Other, except that there may
+ *      be at most one Master controller at a time: when a controller
+ *      configures itself as Master, any existing Master is demoted to the
+ *      Slave role.
+ *
+ *    - Slave (NX_ROLE_SLAVE) allows the controller read-only access to
+ *      OpenFlow features.  In particular attempts to modify the flow table
+ *      will be rejected with an OFPBRC_EPERM error.
+ *
+ *      Slave controllers also do not receive asynchronous messages
+ *      (OFPT_PACKET_IN, OFPT_FLOW_REMOVED, OFPT_PORT_STATUS).
+ */
+struct nx_role_request {
+    struct nicira_header nxh;
+    uint32_t role;              /* One of NX_ROLE_*. */
+};
+
+enum nx_role {
+    NX_ROLE_OTHER,              /* Default role, full access. */
+    NX_ROLE_MASTER,             /* Full access, at most one. */
+    NX_ROLE_SLAVE               /* Read-only access. */
+};
+
 enum nx_action_subtype {
     NXAST_SNAT__OBSOLETE,           /* No longer used. */
 
@@ -83,18 +118,31 @@ enum nx_action_subtype {
      * Following the lookup, the original in_port is restored.
      *
      * If the modified flow matched in the flow table, then the corresponding
-     * actions are executed, except that NXAST_RESUBMIT actions found in the
-     * secondary set of actions are ignored.  Afterward, actions following
-     * NXAST_RESUBMIT in the original set of actions, if any, are executed; any
-     * changes made to the packet (e.g. changes to VLAN) by secondary actions
-     * persist when those actions are executed, although the original in_port
-     * is restored.
+     * actions are executed.  Afterward, actions following NXAST_RESUBMIT in
+     * the original set of actions, if any, are executed; any changes made to
+     * the packet (e.g. changes to VLAN) by secondary actions persist when
+     * those actions are executed, although the original in_port is restored.
      *
      * NXAST_RESUBMIT may be used any number of times within a set of actions.
+     *
+     * NXAST_RESUBMIT may nest to an implementation-defined depth.  Beyond this
+     * implementation-defined depth, further NXAST_RESUBMIT actions are simply
+     * ignored.  (Open vSwitch 1.0.1 and earlier did not support recursion.)
      */
     NXAST_RESUBMIT,
 
-    NXAST_SET_TUNNEL                /* Set encapsulating tunnel ID. */
+    /* Set encapsulating tunnel ID. */
+    NXAST_SET_TUNNEL,
+
+    /* Stops processing further actions, if the packet being processed is an
+     * Ethernet+IPv4 ARP packet for which the source Ethernet address inside
+     * the ARP packet differs from the source Ethernet address in the Ethernet
+     * header.
+     *
+     * This is useful because OpenFlow does not provide a way to match on the
+     * Ethernet addresses inside ARP packets, so there is no other way to drop
+     * spoofed ARPs other than sending every ARP packet to a controller. */
+    NXAST_DROP_SPOOFED_ARP
 };
 
 /* Action structure for NXAST_RESUBMIT. */