Drivers: hv: vmbus: define a new VMBus message type for hvsock

A function to send the type of message is also added.

The coming net/hvsock driver will use this function to proactively request
the host to offer a VMBus channel for a new hvsock connection.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 79c4aa70eff3..898eac9e8c13 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -392,6 +392,10 @@ enum vmbus_channel_message_type {
         CHANNELMSG_VERSION_RESPONSE             = 15,
         CHANNELMSG_UNLOAD                       = 16,
         CHANNELMSG_UNLOAD_RESPONSE              = 17,
+        CHANNELMSG_18                           = 18,
+        CHANNELMSG_19                           = 19,
+        CHANNELMSG_20                           = 20,
+        CHANNELMSG_TL_CONNECT_REQUEST           = 21,
         CHANNELMSG_COUNT
 };
 
@@ -562,6 +566,13 @@ struct vmbus_channel_initiate_contact {
         u64 monitor_page2;
 } __packed;
 
+/* Hyper-V socket: guest's connect()-ing to host */
+struct vmbus_channel_tl_connect_request {
+        struct vmbus_channel_message_header header;
+        uuid_le guest_endpoint_id;
+        uuid_le host_service_id;
+} __packed;
+
 struct vmbus_channel_version_response {
         struct vmbus_channel_message_header header;
         u8 version_supported;
@@ -1283,4 +1294,6 @@ void hv_process_channel_removal(struct vmbus_channel *channel, u32 relid);
 
 extern __u32 vmbus_proto_version;
 
+int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id,
+                                  const uuid_le *shv_host_servie_id);
 #endif /* _HYPERV_H */