Reorganize source tree to use single autotools instance

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

1 files changed, 366 insertions, 0 deletions

diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c
new file mode 100644
index 00000000000..91c3988b439
--- /dev/null
+++ b/src/vnet/devices/af_packet/af_packet.c
@@ -0,0 +1,366 @@
+/*
+ *------------------------------------------------------------------
+ * 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_ether.h>
+#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 AF_PACKET_DEBUG_SOCKET		0
+
+#define AF_PACKET_TX_FRAMES_PER_BLOCK	1024
+#define AF_PACKET_TX_FRAME_SIZE	 	(2048 * 5)
+#define AF_PACKET_TX_BLOCK_NR		1
+#define AF_PACKET_TX_FRAME_NR		(AF_PACKET_TX_BLOCK_NR * \
+					 AF_PACKET_TX_FRAMES_PER_BLOCK)
+#define AF_PACKET_TX_BLOCK_SIZE	 	(AF_PACKET_TX_FRAME_SIZE * \
+					 AF_PACKET_TX_FRAMES_PER_BLOCK)
+
+#define AF_PACKET_RX_FRAMES_PER_BLOCK	1024
+#define AF_PACKET_RX_FRAME_SIZE	 	(2048 * 5)
+#define AF_PACKET_RX_BLOCK_NR		1
+#define AF_PACKET_RX_FRAME_NR		(AF_PACKET_RX_BLOCK_NR * \
+					 AF_PACKET_RX_FRAMES_PER_BLOCK)
+#define AF_PACKET_RX_BLOCK_SIZE		(AF_PACKET_RX_FRAME_SIZE * \
+					 AF_PACKET_RX_FRAMES_PER_BLOCK)
+
+#if AF_PACKET_DEBUG_SOCKET == 1
+#define DBG_SOCK(args...) clib_warning(args);
+#else
+#define DBG_SOCK(args...)
+#endif
+
+/*defined in net/if.h but clashes with dpdk headers */
+unsigned int if_nametoindex (const char *ifname);
+
+typedef struct tpacket_req tpacket_req_t;
+
+static u32
+af_packet_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
+			   u32 flags)
+{
+  /* nothing for now */
+  return 0;
+}
+
+static clib_error_t *
+af_packet_fd_read_ready (unix_file_t * uf)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  af_packet_main_t *apm = &af_packet_main;
+  u32 idx = uf->private_data;
+
+  apm->pending_input_bitmap =
+    clib_bitmap_set (apm->pending_input_bitmap, idx, 1);
+
+  /* Schedule the rx node */
+  vlib_node_set_interrupt_pending (vm, af_packet_input_node.index);
+
+  return 0;
+}
+
+static int
+create_packet_v2_sock (u8 * name, tpacket_req_t * rx_req,
+		       tpacket_req_t * tx_req, int *fd, u8 ** ring)
+{
+  int ret, err;
+  struct sockaddr_ll sll;
+  uint host_if_index;
+  int ver = TPACKET_V2;
+  socklen_t req_sz = sizeof (struct tpacket_req);
+  u32 ring_sz = rx_req->tp_block_size * rx_req->tp_block_nr +
+    tx_req->tp_block_size * tx_req->tp_block_nr;
+
+  host_if_index = if_nametoindex ((const char *) name);
+
+  if (!host_if_index)
+    {
+      DBG_SOCK ("Wrong host interface name");
+      ret = VNET_API_ERROR_INVALID_INTERFACE;
+      goto error;
+    }
+
+  if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
+    {
+      DBG_SOCK ("Failed to create socket");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  if ((err =
+       setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver))) < 0)
+    {
+      DBG_SOCK ("Failed to set rx packet interface version");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  int opt = 1;
+  if ((err =
+       setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt))) < 0)
+    {
+      DBG_SOCK ("Failed to set packet tx ring error handling option");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  if ((err =
+       setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz)) < 0)
+    {
+      DBG_SOCK ("Failed to set packet rx ring options");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  if ((err =
+       setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz)) < 0)
+    {
+      DBG_SOCK ("Failed to set packet rx ring options");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  *ring =
+    mmap (NULL, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, *fd,
+	  0);
+  if (*ring == MAP_FAILED)
+    {
+      DBG_SOCK ("mmap failure");
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  memset (&sll, 0, sizeof (sll));
+  sll.sll_family = PF_PACKET;
+  sll.sll_protocol = htons (ETH_P_ALL);
+  sll.sll_ifindex = host_if_index;
+
+  if ((err = bind (*fd, (struct sockaddr *) &sll, sizeof (sll))) < 0)
+    {
+      DBG_SOCK ("Failed to bind rx packet socket (error %d)", err);
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  return 0;
+error:
+  if (*fd >= 0)
+    close (*fd);
+  *fd = -1;
+  return ret;
+}
+
+int
+af_packet_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set,
+		     u32 * sw_if_index)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  int ret, fd = -1;
+  struct tpacket_req *rx_req = 0;
+  struct tpacket_req *tx_req = 0;
+  u8 *ring = 0;
+  af_packet_if_t *apif = 0;
+  u8 hw_addr[6];
+  clib_error_t *error;
+  vnet_sw_interface_t *sw;
+  vnet_main_t *vnm = vnet_get_main ();
+  uword *p;
+  uword if_index;
+  u8 *host_if_name_dup = vec_dup (host_if_name);
+
+  p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
+  if (p)
+    {
+      return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+    }
+
+  vec_validate (rx_req, 0);
+  rx_req->tp_block_size = AF_PACKET_RX_BLOCK_SIZE;
+  rx_req->tp_frame_size = AF_PACKET_RX_FRAME_SIZE;
+  rx_req->tp_block_nr = AF_PACKET_RX_BLOCK_NR;
+  rx_req->tp_frame_nr = AF_PACKET_RX_FRAME_NR;
+
+  vec_validate (tx_req, 0);
+  tx_req->tp_block_size = AF_PACKET_TX_BLOCK_SIZE;
+  tx_req->tp_frame_size = AF_PACKET_TX_FRAME_SIZE;
+  tx_req->tp_block_nr = AF_PACKET_TX_BLOCK_NR;
+  tx_req->tp_frame_nr = AF_PACKET_TX_FRAME_NR;
+
+  ret = create_packet_v2_sock (host_if_name, rx_req, tx_req, &fd, &ring);
+
+  if (ret != 0)
+    goto error;
+
+  /* So far everything looks good, let's create interface */
+  pool_get (apm->interfaces, apif);
+  if_index = apif - apm->interfaces;
+
+  apif->fd = fd;
+  apif->rx_ring = ring;
+  apif->tx_ring = ring + rx_req->tp_block_size * rx_req->tp_block_nr;
+  apif->rx_req = rx_req;
+  apif->tx_req = tx_req;
+  apif->host_if_name = host_if_name_dup;
+  apif->per_interface_next_index = ~0;
+  apif->next_tx_frame = 0;
+  apif->next_rx_frame = 0;
+
+  {
+    unix_file_t template = { 0 };
+    template.read_function = af_packet_fd_read_ready;
+    template.file_descriptor = fd;
+    template.private_data = if_index;
+    template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+    apif->unix_file_index = unix_file_add (&unix_main, &template);
+  }
+
+  /*use configured or generate random MAC address */
+  if (hw_addr_set)
+    clib_memcpy (hw_addr, hw_addr_set, 6);
+  else
+    {
+      f64 now = vlib_time_now (vm);
+      u32 rnd;
+      rnd = (u32) (now * 1e6);
+      rnd = random_u32 (&rnd);
+
+      clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
+      hw_addr[0] = 2;
+      hw_addr[1] = 0xfe;
+    }
+
+  error = ethernet_register_interface (vnm, af_packet_device_class.index,
+				       if_index, hw_addr, &apif->hw_if_index,
+				       af_packet_eth_flag_change);
+
+  if (error)
+    {
+      memset (apif, 0, sizeof (*apif));
+      pool_put (apm->interfaces, apif);
+      clib_error_report (error);
+      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+      goto error;
+    }
+
+  sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
+  apif->sw_if_index = sw->sw_if_index;
+
+  vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
+			       VNET_HW_INTERFACE_FLAG_LINK_UP);
+
+  mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
+		 0);
+  if (sw_if_index)
+    *sw_if_index = apif->sw_if_index;
+  return 0;
+
+error:
+  vec_free (host_if_name_dup);
+  vec_free (rx_req);
+  vec_free (tx_req);
+  return ret;
+}
+
+int
+af_packet_delete_if (vlib_main_t * vm, u8 * host_if_name)
+{
+  vnet_main_t *vnm = vnet_get_main ();
+  af_packet_main_t *apm = &af_packet_main;
+  af_packet_if_t *apif;
+  uword *p;
+  uword if_index;
+  u32 ring_sz;
+
+  p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
+  if (p == NULL)
+    {
+      clib_warning ("Host interface %s does not exist", host_if_name);
+      return VNET_API_ERROR_SYSCALL_ERROR_1;
+    }
+  apif = pool_elt_at_index (apm->interfaces, p[0]);
+  if_index = apif - apm->interfaces;
+
+  /* bring down the interface */
+  vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
+
+  /* clean up */
+  if (apif->unix_file_index != ~0)
+    {
+      unix_file_del (&unix_main, unix_main.file_pool + apif->unix_file_index);
+      apif->unix_file_index = ~0;
+    }
+  else
+    close (apif->fd);
+
+  ring_sz = apif->rx_req->tp_block_size * apif->rx_req->tp_block_nr +
+    apif->tx_req->tp_block_size * apif->tx_req->tp_block_nr;
+  if (munmap (apif->rx_ring, ring_sz))
+    clib_warning ("Host interface %s could not free rx/tx ring",
+		  host_if_name);
+  apif->rx_ring = NULL;
+  apif->tx_ring = NULL;
+  apif->fd = -1;
+
+  vec_free (apif->rx_req);
+  apif->rx_req = NULL;
+  vec_free (apif->tx_req);
+  apif->tx_req = NULL;
+
+  vec_free (apif->host_if_name);
+  apif->host_if_name = NULL;
+
+  mhash_unset (&apm->if_index_by_host_if_name, host_if_name, &if_index);
+
+  ethernet_delete_interface (vnm, apif->hw_if_index);
+
+  pool_put (apm->interfaces, apif);
+
+  return 0;
+}
+
+static clib_error_t *
+af_packet_init (vlib_main_t * vm)
+{
+  af_packet_main_t *apm = &af_packet_main;
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+  memset (apm, 0, sizeof (af_packet_main_t));
+
+  mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
+
+  vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */