Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 250 insertions, 0 deletions

diff --git a/src/vnet/devices/af_packet/device.c b/src/vnet/devices/af_packet/device.c
new file mode 100644
index 00000000000..1fb4000f6e6
--- /dev/null
+++ b/src/vnet/devices/af_packet/device.c
@@ -0,0 +1,250 @@
+/*
+ *------------------------------------------------------------------
+ * 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 <linux/if_packet.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/af_packet/af_packet.h>
+
+#define foreach_af_packet_tx_func_error               \
+_(FRAME_NOT_READY, "tx frame not ready")              \
+_(TXRING_EAGAIN,   "tx sendto temporary failure")     \
+_(TXRING_FATAL,    "tx sendto fatal failure")         \
+_(TXRING_OVERRUN,  "tx ring overrun")
+
+typedef enum
+{
+#define _(f,s) AF_PACKET_TX_ERROR_##f,
+  foreach_af_packet_tx_func_error
+#undef _
+    AF_PACKET_TX_N_ERROR,
+} af_packet_tx_func_error_t;
+
+static char *af_packet_tx_func_error_strings[] = {
+#define _(n,s) s,
+  foreach_af_packet_tx_func_error
+#undef _
+};
+
+
+static u8 *
+format_af_packet_device_name (u8 * s, va_list * args)
+{
+  u32 i = va_arg (*args, u32);
+  af_packet_main_t *apm = &af_packet_main;
+  af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, i);
+
+  s = format (s, "host-%s", apif->host_if_name);
+  return s;
+}
+
+static u8 *
+format_af_packet_device (u8 * s, va_list * args)
+{
+  s = format (s, "Linux PACKET socket interface");
+  return s;
+}
+
+static u8 *
+format_af_packet_tx_trace (u8 * s, va_list * args)
+{
+  s = format (s, "Unimplemented...");
+  return s;
+}
+
+static uword
+af_packet_interface_tx (vlib_main_t * vm,
+			vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  u32 *buffers = vlib_frame_args (frame);
+  u32 n_left = frame->n_vectors;
+  u32 n_sent = 0;
+  vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+  af_packet_if_t *apif =
+    pool_elt_at_index (apm->interfaces, rd->dev_instance);
+  int block = 0;
+  u32 block_size = apif->tx_req->tp_block_size;
+  u32 frame_size = apif->tx_req->tp_frame_size;
+  u32 frame_num = apif->tx_req->tp_frame_nr;
+  u8 *block_start = apif->tx_ring + block * block_size;
+  u32 tx_frame = apif->next_tx_frame;
+  struct tpacket2_hdr *tph;
+  u32 frame_not_ready = 0;
+
+  while (n_left > 0)
+    {
+      u32 len;
+      u32 offset = 0;
+      vlib_buffer_t *b0;
+      n_left--;
+      u32 bi = buffers[0];
+      buffers++;
+
+      tph = (struct tpacket2_hdr *) (block_start + tx_frame * frame_size);
+
+      if (PREDICT_FALSE
+	  (tph->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
+	{
+	  frame_not_ready++;
+	  goto next;
+	}
+
+      do
+	{
+	  b0 = vlib_get_buffer (vm, bi);
+	  len = b0->current_length;
+	  clib_memcpy ((u8 *) tph +
+		       TPACKET_ALIGN (sizeof (struct tpacket2_hdr)) + offset,
+		       vlib_buffer_get_current (b0), len);
+	  offset += len;
+	}
+      while ((bi = b0->next_buffer));
+
+      tph->tp_len = tph->tp_snaplen = offset;
+      tph->tp_status = TP_STATUS_SEND_REQUEST;
+      n_sent++;
+    next:
+      /* check if we've exhausted the ring */
+      if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+	break;
+
+      tx_frame = (tx_frame + 1) % frame_num;
+    }
+
+  CLIB_MEMORY_BARRIER ();
+
+  if (PREDICT_TRUE (n_sent))
+    {
+      apif->next_tx_frame = tx_frame;
+
+      if (PREDICT_FALSE (sendto (apif->fd, NULL, 0,
+				 MSG_DONTWAIT, NULL, 0) == -1))
+	{
+	  /* Uh-oh, drop & move on, but count whether it was fatal or not.
+	   * Note that we have no reliable way to properly determine the
+	   * disposition of the packets we just enqueued for delivery.
+	   */
+	  vlib_error_count (vm, node->node_index,
+			    unix_error_is_fatal (errno) ?
+			    AF_PACKET_TX_ERROR_TXRING_FATAL :
+			    AF_PACKET_TX_ERROR_TXRING_EAGAIN, n_sent);
+	}
+    }
+
+  if (PREDICT_FALSE (frame_not_ready))
+    vlib_error_count (vm, node->node_index,
+		      AF_PACKET_TX_ERROR_FRAME_NOT_READY, frame_not_ready);
+
+  if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+    vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN,
+		      n_left);
+
+  vlib_buffer_free (vm, vlib_frame_args (frame), frame->n_vectors);
+  return frame->n_vectors;
+}
+
+static void
+af_packet_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
+				   u32 node_index)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+  af_packet_if_t *apif =
+    pool_elt_at_index (apm->interfaces, hw->dev_instance);
+
+  /* Shut off redirection */
+  if (node_index == ~0)
+    {
+      apif->per_interface_next_index = node_index;
+      return;
+    }
+
+  apif->per_interface_next_index =
+    vlib_node_add_next (vlib_get_main (), af_packet_input_node.index,
+			node_index);
+}
+
+static void
+af_packet_clear_hw_interface_counters (u32 instance)
+{
+  /* Nothing for now */
+}
+
+static clib_error_t *
+af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
+				   u32 flags)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+  af_packet_if_t *apif =
+    pool_elt_at_index (apm->interfaces, hw->dev_instance);
+  u32 hw_flags;
+
+  apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+  if (apif->is_admin_up)
+    hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
+  else
+    hw_flags = 0;
+
+  vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+
+  return 0;
+}
+
+static clib_error_t *
+af_packet_subif_add_del_function (vnet_main_t * vnm,
+				  u32 hw_if_index,
+				  struct vnet_sw_interface_t *st, int is_add)
+{
+  /* Nothing for now */
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (af_packet_device_class) = {
+  .name = "af-packet",
+  .tx_function = af_packet_interface_tx,
+  .format_device_name = format_af_packet_device_name,
+  .format_device = format_af_packet_device,
+  .format_tx_trace = format_af_packet_tx_trace,
+  .tx_function_n_errors = AF_PACKET_TX_N_ERROR,
+  .tx_function_error_strings = af_packet_tx_func_error_strings,
+  .rx_redirect_to_node = af_packet_set_interface_next_node,
+  .clear_counters = af_packet_clear_hw_interface_counters,
+  .admin_up_down_function = af_packet_interface_admin_up_down,
+  .subif_add_del_function = af_packet_subif_add_del_function,
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (af_packet_device_class,
+				   af_packet_interface_tx)
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */