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>

2 files changed, 19 insertions, 0 deletions

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 3f0453302146..fcab234796ef 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -219,6 +219,21 @@ error0:
 }
 EXPORT_SYMBOL_GPL(vmbus_open);
 
+/* Used for Hyper-V Socket: a guest client's connect() to the host */
+int vmbus_send_tl_connect_request(const uuid_le *shv_guest_servie_id,
+                                  const uuid_le *shv_host_servie_id)
+{
+        struct vmbus_channel_tl_connect_request conn_msg;
+
+        memset(&conn_msg, 0, sizeof(conn_msg));
+        conn_msg.header.msgtype = CHANNELMSG_TL_CONNECT_REQUEST;
+        conn_msg.guest_endpoint_id = *shv_guest_servie_id;
+        conn_msg.host_service_id = *shv_host_servie_id;
+
+        return vmbus_post_msg(&conn_msg, sizeof(conn_msg));
+}
+EXPORT_SYMBOL_GPL(vmbus_send_tl_connect_request);
+
 /*
  * create_gpadl_header - Creates a gpadl for the specified buffer
  */
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index d6c611457601..60ca25b93b4c 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -958,6 +958,10 @@ struct vmbus_channel_message_table_entry
         {CHANNELMSG_VERSION_RESPONSE,           1, vmbus_onversion_response},
         {CHANNELMSG_UNLOAD,                     0, NULL},
         {CHANNELMSG_UNLOAD_RESPONSE,            1, vmbus_unload_response},
+        {CHANNELMSG_18,                         0, NULL},
+        {CHANNELMSG_19,                         0, NULL},
+        {CHANNELMSG_20,                         0, NULL},
+        {CHANNELMSG_TL_CONNECT_REQUEST,         0, NULL},
 };
 
 /*