netmap: Reinstate and update netmap plugin

Thet netmap plugin was moved to depreciated in commit 998b8fe.

On FreeBSD netmap offers a natively supported kernel interface for
userspace networking and enables VPP without the use of DPDK.

Reinstate the netmap plugin and adapt it to the newer plugin interface.

Type: improvement
Change-Id: I113daa33a490f04cbb29909f9789fa66284ac80e
Signed-off-by: Tom Jones <thj@freebsd.org>

1 files changed, 0 insertions, 315 deletions

diff --git a/extras/deprecated/netmap/netmap.c b/extras/deprecated/netmap/netmap.c
deleted file mode 100644
index 7cab6bb0289..00000000000
--- a/extras/deprecated/netmap/netmap.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- *------------------------------------------------------------------
- * 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 <stdint.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <vnet/devices/netmap/net_netmap.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/netmap/netmap.h>
-
-netmap_main_t netmap_main;
-
-static u32
-netmap_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
-			u32 flags)
-{
-  /* nothing for now */
-  return 0;
-}
-
-static clib_error_t *
-netmap_fd_read_ready (clib_file_t * uf)
-{
-  vlib_main_t *vm = vlib_get_main ();
-  netmap_main_t *nm = &netmap_main;
-  u32 idx = uf->private_data;
-
-  nm->pending_input_bitmap =
-    clib_bitmap_set (nm->pending_input_bitmap, idx, 1);
-
-  /* Schedule the rx node */
-  vlib_node_set_interrupt_pending (vm, netmap_input_node.index);
-
-  return 0;
-}
-
-static void
-close_netmap_if (netmap_main_t * nm, netmap_if_t * nif)
-{
-  if (nif->clib_file_index != ~0)
-    {
-      clib_file_del (&file_main, file_main.file_pool + nif->clib_file_index);
-      nif->clib_file_index = ~0;
-    }
-  else if (nif->fd > -1)
-    close (nif->fd);
-
-  if (nif->mem_region)
-    {
-      netmap_mem_region_t *reg = &nm->mem_regions[nif->mem_region];
-      if (--reg->refcnt == 0)
-	{
-	  munmap (reg->mem, reg->region_size);
-	  reg->region_size = 0;
-	}
-    }
-
-
-  mhash_unset (&nm->if_index_by_host_if_name, nif->host_if_name,
-	       &nif->if_index);
-  vec_free (nif->host_if_name);
-  vec_free (nif->req);
-
-  clib_memset (nif, 0, sizeof (*nif));
-  pool_put (nm->interfaces, nif);
-}
-
-int
-netmap_worker_thread_enable ()
-{
-  /* if worker threads are enabled, switch to polling mode */
-  foreach_vlib_main ((
-		       {
-		       vlib_node_set_state (this_vlib_main,
-					    netmap_input_node.index,
-					    VLIB_NODE_STATE_POLLING);
-		       }));
-
-  return 0;
-}
-
-int
-netmap_worker_thread_disable ()
-{
-  foreach_vlib_main ((
-		       {
-		       vlib_node_set_state (this_vlib_main,
-					    netmap_input_node.index,
-					    VLIB_NODE_STATE_INTERRUPT);
-		       }));
-
-  return 0;
-}
-
-int
-netmap_create_if (vlib_main_t * vm, u8 * if_name, u8 * hw_addr_set,
-		  u8 is_pipe, u8 is_master, u32 * sw_if_index)
-{
-  netmap_main_t *nm = &netmap_main;
-  int ret = 0;
-  netmap_if_t *nif = 0;
-  u8 hw_addr[6];
-  clib_error_t *error = 0;
-  vnet_sw_interface_t *sw;
-  vnet_main_t *vnm = vnet_get_main ();
-  uword *p;
-  struct nmreq *req = 0;
-  netmap_mem_region_t *reg;
-  vlib_thread_main_t *tm = vlib_get_thread_main ();
-  int fd;
-
-  p = mhash_get (&nm->if_index_by_host_if_name, if_name);
-  if (p)
-    return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
-
-  fd = open ("/dev/netmap", O_RDWR);
-  if (fd < 0)
-    return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
-
-  pool_get (nm->interfaces, nif);
-  nif->if_index = nif - nm->interfaces;
-  nif->fd = fd;
-  nif->clib_file_index = ~0;
-
-  vec_validate (req, 0);
-  nif->req = req;
-  req->nr_version = NETMAP_API;
-  req->nr_flags = NR_REG_ALL_NIC;
-
-  if (is_pipe)
-    req->nr_flags = is_master ? NR_REG_PIPE_MASTER : NR_REG_PIPE_SLAVE;
-  else
-    req->nr_flags = NR_REG_ALL_NIC;
-
-  req->nr_flags |= NR_ACCEPT_VNET_HDR;
-  snprintf (req->nr_name, IFNAMSIZ, "%s", if_name);
-  req->nr_name[IFNAMSIZ - 1] = 0;
-
-  if (ioctl (nif->fd, NIOCREGIF, req))
-    {
-      ret = VNET_API_ERROR_NOT_CONNECTED;
-      goto error;
-    }
-
-  nif->mem_region = req->nr_arg2;
-  vec_validate (nm->mem_regions, nif->mem_region);
-  reg = &nm->mem_regions[nif->mem_region];
-  if (reg->region_size == 0)
-    {
-      reg->mem = mmap (NULL, req->nr_memsize, PROT_READ | PROT_WRITE,
-		       MAP_SHARED, fd, 0);
-      clib_warning ("mem %p", reg->mem);
-      if (reg->mem == MAP_FAILED)
-	{
-	  ret = VNET_API_ERROR_NOT_CONNECTED;
-	  goto error;
-	}
-      reg->region_size = req->nr_memsize;
-    }
-  reg->refcnt++;
-
-  nif->nifp = NETMAP_IF (reg->mem, req->nr_offset);
-  nif->first_rx_ring = 0;
-  nif->last_rx_ring = 0;
-  nif->first_tx_ring = 0;
-  nif->last_tx_ring = 0;
-  nif->host_if_name = if_name;
-  nif->per_interface_next_index = ~0;
-
-  if (tm->n_vlib_mains > 1)
-    clib_spinlock_init (&nif->lockp);
-
-  {
-    clib_file_t template = { 0 };
-    template.read_function = netmap_fd_read_ready;
-    template.file_descriptor = nif->fd;
-    template.private_data = nif->if_index;
-    template.description = format (0, "netmap socket");
-    nif->clib_file_index = clib_file_add (&file_main, &template);
-  }
-
-  /*use configured or generate random MAC address */
-  if (hw_addr_set)
-    memcpy (hw_addr, hw_addr_set, 6);
-  else
-    {
-      f64 now = vlib_time_now (vm);
-      u32 rnd;
-      rnd = (u32) (now * 1e6);
-      rnd = random_u32 (&rnd);
-
-      memcpy (hw_addr + 2, &rnd, sizeof (rnd));
-      hw_addr[0] = 2;
-      hw_addr[1] = 0xfe;
-    }
-
-  error = ethernet_register_interface (vnm, netmap_device_class.index,
-				       nif->if_index, hw_addr,
-				       &nif->hw_if_index,
-				       netmap_eth_flag_change);
-
-  if (error)
-    {
-      clib_error_report (error);
-      ret = VNET_API_ERROR_SYSCALL_ERROR_1;
-      goto error;
-    }
-
-  sw = vnet_get_hw_sw_interface (vnm, nif->hw_if_index);
-  nif->sw_if_index = sw->sw_if_index;
-
-  mhash_set_mem (&nm->if_index_by_host_if_name, if_name, &nif->if_index, 0);
-
-  if (sw_if_index)
-    *sw_if_index = nif->sw_if_index;
-
-  if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 1)
-    netmap_worker_thread_enable ();
-
-  return 0;
-
-error:
-  close_netmap_if (nm, nif);
-  return ret;
-}
-
-int
-netmap_delete_if (vlib_main_t * vm, u8 * host_if_name)
-{
-  vnet_main_t *vnm = vnet_get_main ();
-  netmap_main_t *nm = &netmap_main;
-  netmap_if_t *nif;
-  uword *p;
-  vlib_thread_main_t *tm = vlib_get_thread_main ();
-
-  p = mhash_get (&nm->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;
-    }
-  nif = pool_elt_at_index (nm->interfaces, p[0]);
-
-  /* bring down the interface */
-  vnet_hw_interface_set_flags (vnm, nif->hw_if_index, 0);
-
-  ethernet_delete_interface (vnm, nif->hw_if_index);
-
-  close_netmap_if (nm, nif);
-
-  if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 0)
-    netmap_worker_thread_disable ();
-
-  return 0;
-}
-
-static clib_error_t *
-netmap_init (vlib_main_t * vm)
-{
-  netmap_main_t *nm = &netmap_main;
-  vlib_thread_main_t *tm = vlib_get_thread_main ();
-  vlib_thread_registration_t *tr;
-  uword *p;
-
-  clib_memset (nm, 0, sizeof (netmap_main_t));
-
-  nm->input_cpu_first_index = 0;
-  nm->input_cpu_count = 1;
-
-  /* find out which cpus will be used for input */
-  p = hash_get_mem (tm->thread_registrations_by_name, "workers");
-  tr = p ? (vlib_thread_registration_t *) p[0] : 0;
-
-  if (tr && tr->count > 0)
-    {
-      nm->input_cpu_first_index = tr->first_index;
-      nm->input_cpu_count = tr->count;
-    }
-
-  mhash_init_vec_string (&nm->if_index_by_host_if_name, sizeof (uword));
-
-  vec_validate_aligned (nm->rx_buffers, tm->n_vlib_mains - 1,
-			CLIB_CACHE_LINE_BYTES);
-
-  return 0;
-}
-
-VLIB_INIT_FUNCTION (netmap_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */