interface: add custom interface name support

add CLI "set interface name <current-int-name> <new-int-name>
and the corresponding binary API to allow custom interface name
setting for any interface.

Type: feature

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I2b39da59879fd4526bcb5aa5854b6bd21e72ea73

3 files changed, 100 insertions, 1 deletions

diff --git a/src/vnet/interface.api b/src/vnet/interface.api
index 38dc4320b8d..d89dea4e353 100644
--- a/src/vnet/interface.api
+++ b/src/vnet/interface.api
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-option version = "3.2.2";
+option version = "3.2.3";
 
 import "vnet/interface_types.api";
 import "vnet/ethernet/ethernet_types.api";
@@ -458,6 +458,22 @@ autoreply define sw_interface_set_rx_placement
     bool is_main;
 };
 
+/** \brief Set custom interface name
+    Set custom interface name for the interface.
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param sw_if_index - the interface whose name will be set
+    @param name - the custom interface name to be set
+k
+*/
+autoreply define sw_interface_set_interface_name
+{
+  u32 client_index;
+  u32 context;
+  vl_api_interface_index_t sw_if_index;
+  string name[64];
+};
+
 /** \brief dump the rx queue placement of interface(s)
     @param sw_if_index - optional interface index for which queue placement to
       be requested. sw_if_index = ~0 will dump placement information for all
diff --git a/src/vnet/interface_api.c b/src/vnet/interface_api.c
index 9b606dd6265..f9e03b9f1ea 100644
--- a/src/vnet/interface_api.c
+++ b/src/vnet/interface_api.c
@@ -1016,6 +1016,39 @@ static void vl_api_sw_interface_get_mac_address_t_handler
   vl_api_send_msg (reg, (u8 *) rmp);
 }
 
+static void
+vl_api_sw_interface_set_interface_name_t_handler (
+  vl_api_sw_interface_set_interface_name_t *mp)
+{
+  vl_api_sw_interface_set_interface_name_reply_t *rmp;
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 sw_if_index = ntohl (mp->sw_if_index);
+  vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+  clib_error_t *error;
+  int rv = 0;
+
+  if (mp->name[0] == 0)
+    {
+      rv = VNET_API_ERROR_INVALID_VALUE;
+      goto out;
+    }
+  if (si == 0)
+    {
+      rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
+      goto out;
+    }
+
+  error = vnet_rename_interface (vnm, si->hw_if_index, (char *) mp->name);
+  if (error)
+    {
+      clib_error_free (error);
+      rv = VNET_API_ERROR_INVALID_SW_IF_INDEX;
+    }
+
+out:
+  REPLY_MACRO (VL_API_SW_INTERFACE_SET_INTERFACE_NAME_REPLY);
+}
+
 static void vl_api_sw_interface_set_rx_mode_t_handler
   (vl_api_sw_interface_set_rx_mode_t * mp)
 {
@@ -1430,6 +1463,7 @@ interface_api_hookup (vlib_main_t * vm)
   am->is_mp_safe[VL_API_SW_INTERFACE_DUMP] = 1;
   am->is_mp_safe[VL_API_SW_INTERFACE_DETAILS] = 1;
   am->is_mp_safe[VL_API_SW_INTERFACE_TAG_ADD_DEL] = 1;
+  am->is_mp_safe[VL_API_SW_INTERFACE_SET_INTERFACE_NAME] = 1;
 
   /* Do not replay VL_API_SW_INTERFACE_DUMP messages */
   am->api_trace_cfg[VL_API_SW_INTERFACE_DUMP].replay_enable = 0;
diff --git a/src/vnet/interface_cli.c b/src/vnet/interface_cli.c
index 2bddf29b70f..8475225b525 100644
--- a/src/vnet/interface_cli.c
+++ b/src/vnet/interface_cli.c
@@ -2402,6 +2402,55 @@ VLIB_CLI_COMMAND (pcap_tx_trace_command, static) = {
 };
 /* *INDENT-ON* */
 
+static clib_error_t *
+set_interface_name (vlib_main_t *vm, unformat_input_t *input,
+		    vlib_cli_command_t *cmd)
+{
+  clib_error_t *error = 0;
+  unformat_input_t _line_input, *line_input = &_line_input;
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 hw_if_index = ~0;
+  char *name = 0;
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "%U %s", unformat_vnet_hw_interface, vnm,
+		    &hw_if_index, &name))
+	;
+      else
+	{
+	  error = clib_error_return (0, "parse error: '%U'",
+				     format_unformat_error, line_input);
+	  unformat_free (line_input);
+	  vec_free (name);
+	  return error;
+	}
+    }
+
+  unformat_free (line_input);
+
+  if (hw_if_index == (u32) ~0 || name == 0)
+    {
+      vec_free (name);
+      error = clib_error_return (0, "please specify valid interface name");
+      return error;
+    }
+
+  error = vnet_rename_interface (vnm, hw_if_index, name);
+  vec_free (name);
+
+  return (error);
+}
+
+VLIB_CLI_COMMAND (cmd_set_if_name, static) = {
+  .path = "set interface name",
+  .short_help = "set interface name <interface-name> <new-interface-name>",
+  .function = set_interface_name,
+  .is_mp_safe = 1,
+};
 /*
  * fd.io coding-style-patch-verification: ON
  *