af_packet: move to plugin

Type: improvement

Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Change-Id: I3ec857adb3a9e8a778072a202a4d23f4101e83b2

1 files changed, 295 insertions, 0 deletions

diff --git a/src/plugins/af_packet/cli.c b/src/plugins/af_packet/cli.c
new file mode 100644
index 00000000000..6a8377540d8
--- /dev/null
+++ b/src/plugins/af_packet/cli.c
@@ -0,0 +1,295 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.c - linux kernel packet interface
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h>		/* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h>		/* for iovec */
+#include <netinet/in.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <af_packet/af_packet.h>
+
+/**
+ * @file
+ * @brief CLI for Host Interface Device Driver.
+ *
+ * This file contains the source code for CLI for the host interface.
+ */
+
+static clib_error_t *
+af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			     vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  af_packet_create_if_arg_t _arg, *arg = &_arg;
+  clib_error_t *error = NULL;
+  u8 hwaddr[6];
+  int r;
+
+  clib_memset (arg, 0, sizeof (*arg));
+
+  // Default mode
+  arg->mode = AF_PACKET_IF_MODE_ETHERNET;
+
+  // Default number of rx/tx queue(s)
+  arg->num_rxqs = 1;
+  arg->num_txqs = 1;
+
+  // Default flags
+  arg->flags = AF_PACKET_IF_FLAGS_QDISC_BYPASS | AF_PACKET_IF_FLAGS_CKSUM_GSO;
+
+  /* Get a line of input. */
+  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, "name %s", &arg->host_if_name))
+	;
+      else if (unformat (line_input, "rx-size %u", &arg->rx_frame_size))
+	;
+      else if (unformat (line_input, "tx-size %u", &arg->tx_frame_size))
+	;
+      else if (unformat (line_input, "rx-per-block %u",
+			 &arg->rx_frames_per_block))
+	;
+      else if (unformat (line_input, "tx-per-block %u",
+			 &arg->tx_frames_per_block))
+	;
+      else if (unformat (line_input, "num-rx-queues %u", &arg->num_rxqs))
+	;
+      else if (unformat (line_input, "num-tx-queues %u", &arg->num_txqs))
+	;
+      else if (unformat (line_input, "qdisc-bypass-disable"))
+	arg->flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
+      else if (unformat (line_input, "cksum-gso-disable"))
+	arg->flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
+      else if (unformat (line_input, "mode ip"))
+	arg->mode = AF_PACKET_IF_MODE_IP;
+      else if (unformat (line_input, "v2"))
+	arg->is_v2 = 1;
+      else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address,
+			 hwaddr))
+	arg->hw_addr = hwaddr;
+      else
+	{
+	  error = clib_error_return (0, "unknown input `%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (arg->host_if_name == NULL)
+    {
+      error = clib_error_return (0, "missing host interface name");
+      goto done;
+    }
+
+  r = af_packet_create_if (arg);
+
+  if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
+    {
+      error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
+      goto done;
+    }
+
+  if (r == VNET_API_ERROR_INVALID_INTERFACE)
+    {
+      error = clib_error_return (0, "Invalid interface name");
+      goto done;
+    }
+
+  if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
+    {
+      error = clib_error_return (0, "Interface already exists");
+      goto done;
+    }
+
+  vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+		   arg->sw_if_index);
+
+done:
+  vec_free (arg->host_if_name);
+  unformat_free (line_input);
+
+  return error;
+}
+
+/*?
+ * Create a host interface that will attach to a linux AF_PACKET
+ * interface, one side of a veth pair. The veth pair must already
+ * exist. Once created, a new host interface will exist in VPP
+ * with the name '<em>host-<ifname></em>', where '<em><ifname></em>'
+ * is the name of the specified veth pair. Use the
+ * '<em>show interface</em>' command to display host interface details.
+ *
+ * This command has the following optional parameters:
+ *
+ * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either
+ * X:X:X:X:X:X unix or X.X.X cisco format.
+ *
+ * @cliexpar
+ * Example of how to create a host interface tied to one side of an
+ * existing linux veth pair named vpp1:
+ * @cliexstart{create host-interface name vpp1}
+ * host-vpp1
+ * @cliexend
+ * Once the host interface is created, enable the interface using:
+ * @cliexcmd{set interface state host-vpp1 up}
+?*/
+VLIB_CLI_COMMAND (af_packet_create_command, static) = {
+  .path = "create host-interface",
+  .short_help = "create host-interface [v2] name <ifname> [num-rx-queues <n>] "
+		"[num-tx-queues <n>] [hw-addr <mac-addr>] [mode ip] "
+		"[qdisc-bypass-disable] [cksum-gso-disable]",
+  .function = af_packet_create_command_fn,
+};
+
+static clib_error_t *
+af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
+			     vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u8 *host_if_name = NULL;
+  clib_error_t *error = NULL;
+
+  /* Get a line of input. */
+  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, "name %s", &host_if_name))
+	;
+      else
+	{
+	  error = clib_error_return (0, "unknown input `%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (host_if_name == NULL)
+    {
+      error = clib_error_return (0, "missing host interface name");
+      goto done;
+    }
+
+  af_packet_delete_if (host_if_name);
+
+done:
+  vec_free (host_if_name);
+  unformat_free (line_input);
+
+  return error;
+}
+
+/*?
+ * Delete a host interface. Use the linux interface name to identify
+ * the host interface to be deleted. In VPP, host interfaces are
+ * named as '<em>host-<ifname></em>', where '<em><ifname></em>'
+ * is the name of the linux interface.
+ *
+ * @cliexpar
+ * Example of how to delete a host interface named host-vpp1:
+ * @cliexcmd{delete host-interface name vpp1}
+?*/
+VLIB_CLI_COMMAND (af_packet_delete_command, static) = {
+  .path = "delete host-interface",
+  .short_help = "delete host-interface name <ifname>",
+  .function = af_packet_delete_command_fn,
+};
+
+static clib_error_t *
+af_packet_set_l4_cksum_offload_command_fn (vlib_main_t * vm,
+					   unformat_input_t * input,
+					   vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u8 set = 0;
+  clib_error_t *error = NULL;
+  vnet_main_t *vnm = vnet_get_main ();
+  u32 sw_if_index;
+
+  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", unformat_vnet_sw_interface, vnm,
+		    &sw_if_index))
+	;
+      else if (unformat (line_input, "on"))
+	set = 1;
+      else if (unformat (line_input, "off"))
+	set = 0;
+      else
+	{
+	  error = clib_error_return (0, "unknown input '%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (af_packet_set_l4_cksum_offload (sw_if_index, set) < 0)
+    error = clib_error_return (0, "not an af_packet interface");
+
+done:
+  unformat_free (line_input);
+  return error;
+}
+
+/*?
+ * Set TCP/UDP offload checksum calculation. Use interface
+ * name to identify the interface to set TCP/UDP offload checksum
+ * calculation.
+ *
+ * @cliexpar
+ * Example of how to set TCP/UDP offload checksum calculation on host-vpp0:
+ * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 off}
+ * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 on}
+?*/
+VLIB_CLI_COMMAND (af_packet_set_l4_cksum_offload_command, static) = {
+  .path = "set host-interface l4-cksum-offload",
+  .short_help = "set host-interface l4-cksum-offload <host-if-name> <on|off>",
+  .function = af_packet_set_l4_cksum_offload_command_fn,
+};
+
+clib_error_t *
+af_packet_cli_init (vlib_main_t * vm)
+{
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_cli_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */