Reorganize source tree to use single autotools instance

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

1 files changed, 606 insertions, 0 deletions

diff --git a/src/vnet/gre/interface.c b/src/vnet/gre/interface.c
new file mode 100644
index 00000000000..d624587d8e9
--- /dev/null
+++ b/src/vnet/gre/interface.c
@@ -0,0 +1,606 @@
+/*
+ * gre_interface.c: gre interfaces
+ *
+ * Copyright (c) 2012 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 <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/gre/gre.h>
+#include <vnet/ip/format.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/adj/adj_midchain.h>
+#include <vnet/adj/adj_nbr.h>
+#include <vnet/mpls/mpls.h>
+
+static const char *gre_tunnel_type_names[] = GRE_TUNNEL_TYPE_NAMES;
+
+static inline u64
+gre_mk_key (const ip4_address_t *src,
+            const ip4_address_t *dst,
+            u32 out_fib_index)
+{
+  // FIXME. the fib index should be part of the key
+  return ((u64)src->as_u32 << 32 | (u64)dst->as_u32);
+}
+
+static u8 *
+format_gre_tunnel_type (u8 * s, va_list * args)
+{
+  gre_tunnel_type_t type = va_arg (*args, gre_tunnel_type_t);
+
+  return (format(s, "%s", gre_tunnel_type_names[type]));
+}
+
+static u8 *
+format_gre_tunnel (u8 * s, va_list * args)
+{
+  gre_tunnel_t * t = va_arg (*args, gre_tunnel_t *);
+  gre_main_t * gm = &gre_main;
+
+  s = format (s,
+              "[%d] %U (src) %U (dst) payload %U outer_fib_index %d",
+              t - gm->tunnels,
+              format_ip4_address, &t->tunnel_src,
+              format_ip4_address, &t->tunnel_dst,
+              format_gre_tunnel_type, t->type,
+              t->outer_fib_index);
+
+  return s;
+}
+
+static gre_tunnel_t *
+gre_tunnel_db_find (const ip4_address_t *src,
+                    const ip4_address_t *dst,
+                    u32 out_fib_index)
+{
+  gre_main_t * gm = &gre_main;
+  uword * p;
+  u64 key;
+
+  key = gre_mk_key(src, dst, out_fib_index);
+
+  p = hash_get (gm->tunnel_by_key, key);
+
+  if (NULL == p)
+    return (NULL);
+
+  return (pool_elt_at_index (gm->tunnels, p[0]));
+}
+
+static void
+gre_tunnel_db_add (const gre_tunnel_t *t)
+{
+  gre_main_t * gm = &gre_main;
+  u64 key;
+
+  key = gre_mk_key(&t->tunnel_src, &t->tunnel_dst, t->outer_fib_index);
+  hash_set (gm->tunnel_by_key, key, t - gm->tunnels);
+}
+
+static void
+gre_tunnel_db_remove (const gre_tunnel_t *t)
+{
+  gre_main_t * gm = &gre_main;
+  u64 key;
+
+  key = gre_mk_key(&t->tunnel_src, &t->tunnel_dst, t->outer_fib_index);
+  hash_unset (gm->tunnel_by_key, key);
+}
+
+static gre_tunnel_t *
+gre_tunnel_from_fib_node (fib_node_t *node)
+{
+#if (CLIB_DEBUG > 0)
+    ASSERT(FIB_NODE_TYPE_GRE_TUNNEL == node->fn_type);
+#endif
+    return ((gre_tunnel_t*) (((char*)node) -
+                             STRUCT_OFFSET_OF(gre_tunnel_t, node)));
+}
+
+/**
+ * gre_tunnel_stack
+ *
+ * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
+ */
+void
+gre_tunnel_stack (adj_index_t ai)
+{
+    gre_main_t * gm = &gre_main;
+    ip_adjacency_t *adj;
+    gre_tunnel_t *gt;
+    u32 sw_if_index;
+
+    adj = adj_get(ai);
+    sw_if_index = adj->rewrite_header.sw_if_index;
+
+    if ((vec_len(gm->tunnel_index_by_sw_if_index) < sw_if_index) ||
+	(~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
+	return;
+
+    gt = pool_elt_at_index(gm->tunnels,
+			   gm->tunnel_index_by_sw_if_index[sw_if_index]);
+
+    /*
+     * find the adjacency that is contributed by the FIB entry
+     * that this tunnel resovles via, and use it as the next adj
+     * in the midchain
+     */
+    if (vnet_hw_interface_get_flags(vnet_get_main(),
+				    gt->hw_if_index) &
+	VNET_HW_INTERFACE_FLAG_LINK_UP)
+    {
+	adj_nbr_midchain_stack(
+	    ai,
+	    fib_entry_contribute_ip_forwarding(gt->fib_entry_index));
+    }
+    else
+    {
+	adj_nbr_midchain_unstack(ai);
+    }
+}
+
+/**
+ * @brief Call back when restacking all adjacencies on a GRE interface
+ */
+static adj_walk_rc_t
+gre_adj_walk_cb (adj_index_t ai,
+		 void *ctx)
+{
+    gre_tunnel_stack(ai);
+
+    return (ADJ_WALK_RC_CONTINUE);
+}
+
+static void
+gre_tunnel_restack (gre_tunnel_t *gt)
+{
+    fib_protocol_t proto;
+
+    /*
+     * walk all the adjacencies on th GRE interface and restack them
+     */
+    FOR_EACH_FIB_IP_PROTOCOL(proto)
+    {
+	adj_nbr_walk(gt->sw_if_index,
+		     proto,
+		     gre_adj_walk_cb,
+		     NULL);
+    }
+}
+
+/**
+ * Function definition to backwalk a FIB node
+ */
+static fib_node_back_walk_rc_t
+gre_tunnel_back_walk (fib_node_t *node,
+		      fib_node_back_walk_ctx_t *ctx)
+{
+    gre_tunnel_restack(gre_tunnel_from_fib_node(node));
+
+    return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/**
+ * Function definition to get a FIB node from its index
+ */
+static fib_node_t*
+gre_tunnel_fib_node_get (fib_node_index_t index)
+{
+    gre_tunnel_t * gt;
+    gre_main_t * gm;
+
+    gm  = &gre_main;
+    gt = pool_elt_at_index(gm->tunnels, index);
+
+    return (&gt->node);
+}
+
+/**
+ * Function definition to inform the FIB node that its last lock has gone.
+ */
+static void
+gre_tunnel_last_lock_gone (fib_node_t *node)
+{
+    /*
+     * The MPLS GRE tunnel is a root of the graph. As such
+     * it never has children and thus is never locked.
+     */
+    ASSERT(0);
+}
+
+/*
+ * Virtual function table registered by MPLS GRE tunnels
+ * for participation in the FIB object graph.
+ */
+const static fib_node_vft_t gre_vft = {
+    .fnv_get = gre_tunnel_fib_node_get,
+    .fnv_last_lock = gre_tunnel_last_lock_gone,
+    .fnv_back_walk = gre_tunnel_back_walk,
+};
+
+static int 
+vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t *a,
+                     u32 * sw_if_indexp)
+{
+  gre_main_t * gm = &gre_main;
+  vnet_main_t * vnm = gm->vnet_main;
+  ip4_main_t * im = &ip4_main;
+  gre_tunnel_t * t;
+  vnet_hw_interface_t * hi;
+  u32 hw_if_index, sw_if_index;
+  u32 outer_fib_index;
+  u8 address[6];
+  clib_error_t *error;
+
+  outer_fib_index = ip4_fib_index_from_table_id(a->outer_fib_id);
+
+  if (~0 == outer_fib_index)
+    return VNET_API_ERROR_NO_SUCH_FIB;
+
+  t = gre_tunnel_db_find(&a->src, &a->dst, a->outer_fib_id);
+
+  if (NULL != t)
+    return VNET_API_ERROR_INVALID_VALUE;
+
+  pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
+  memset (t, 0, sizeof (*t));
+  fib_node_init(&t->node, FIB_NODE_TYPE_GRE_TUNNEL);
+
+  if (a->teb)
+      t->type = GRE_TUNNEL_TYPE_TEB;
+  else
+      t->type = GRE_TUNNEL_TYPE_L3;
+
+  if (vec_len (gm->free_gre_tunnel_hw_if_indices[t->type]) > 0) {
+      vnet_interface_main_t * im = &vnm->interface_main;
+
+      hw_if_index = gm->free_gre_tunnel_hw_if_indices[t->type]
+          [vec_len (gm->free_gre_tunnel_hw_if_indices[t->type])-1];
+      _vec_len (gm->free_gre_tunnel_hw_if_indices[t->type]) -= 1;
+
+      hi = vnet_get_hw_interface (vnm, hw_if_index);
+      hi->dev_instance = t - gm->tunnels;
+      hi->hw_instance = hi->dev_instance;
+
+      /* clear old stats of freed tunnel before reuse */
+      sw_if_index = hi->sw_if_index;
+      vnet_interface_counter_lock(im);
+      vlib_zero_combined_counter
+          (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_TX], sw_if_index);
+      vlib_zero_combined_counter
+          (&im->combined_sw_if_counters[VNET_INTERFACE_COUNTER_RX], sw_if_index);
+      vlib_zero_simple_counter
+          (&im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP], sw_if_index);
+        vnet_interface_counter_unlock(im);
+      if (GRE_TUNNEL_TYPE_TEB == t->type)
+      {
+          t->l2_tx_arc = vlib_node_add_named_next(vlib_get_main(),
+                                                  hi->tx_node_index,
+                                                  "adj-l2-midchain");
+      }
+    } else {
+      if (GRE_TUNNEL_TYPE_TEB == t->type)
+      {
+        /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
+        memset (address, 0, sizeof (address));
+        address[0] = 0xd0;
+        address[1] = 0x0b;
+        address[2] = 0xee;
+        address[3] = 0xd0;
+        address[4] = t - gm->tunnels;
+
+        error = ethernet_register_interface(vnm,
+					    gre_device_teb_class.index,
+					    t - gm->tunnels, address,
+					    &hw_if_index,
+					    0);
+
+        if (error)
+        {
+          clib_error_report (error);
+          return VNET_API_ERROR_INVALID_REGISTRATION;
+        }
+	hi = vnet_get_hw_interface (vnm, hw_if_index);
+
+	t->l2_tx_arc = vlib_node_add_named_next(vlib_get_main(),
+						hi->tx_node_index,
+						"adj-l2-midchain");
+      } else {
+	hw_if_index = vnet_register_interface(vnm,
+					      gre_device_class.index,
+					      t - gm->tunnels,
+					      gre_hw_interface_class.index,
+					      t - gm->tunnels);
+      }
+      hi = vnet_get_hw_interface (vnm, hw_if_index);
+      sw_if_index = hi->sw_if_index;
+    }
+
+  t->hw_if_index = hw_if_index;
+  t->outer_fib_index = outer_fib_index;
+  t->sw_if_index = sw_if_index;
+  t->l2_adj_index = ADJ_INDEX_INVALID;
+
+  vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
+  gm->tunnel_index_by_sw_if_index[sw_if_index] = t - gm->tunnels;
+
+  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
+
+  hi->min_packet_bytes = 64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
+  hi->per_packet_overhead_bytes =
+      /* preamble */ 8 + /* inter frame gap */ 12;
+
+  /* Standard default gre MTU. */
+  hi->max_l3_packet_bytes[VLIB_RX] = hi->max_l3_packet_bytes[VLIB_TX] = 9000;
+
+  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
+  clib_memcpy (&t->tunnel_dst, &a->dst, sizeof (t->tunnel_dst));
+
+  gre_tunnel_db_add(t);
+
+  /*
+   * source the FIB entry for the tunnel's destination
+   * and become a child thereof. The tunnel will then get poked
+   * when the forwarding for the entry updates, and the tunnel can
+   * re-stack accordingly
+   */
+  const fib_prefix_t tun_dst_pfx = {
+      .fp_len = 32,
+      .fp_proto = FIB_PROTOCOL_IP4,
+      .fp_addr = {
+          .ip4 = t->tunnel_dst,
+      }
+  };
+
+  t->fib_entry_index =
+      fib_table_entry_special_add(outer_fib_index,
+                                  &tun_dst_pfx,
+                                  FIB_SOURCE_RR,
+                                  FIB_ENTRY_FLAG_NONE,
+                                  ADJ_INDEX_INVALID);
+  t->sibling_index =
+      fib_entry_child_add(t->fib_entry_index,
+                          FIB_NODE_TYPE_GRE_TUNNEL,
+                          t - gm->tunnels);
+
+  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
+  clib_memcpy (&t->tunnel_dst, &a->dst, sizeof (t->tunnel_dst));
+
+  if (GRE_TUNNEL_TYPE_TEB == t->type)
+  {
+      t->l2_adj_index = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+					    VNET_LINK_ETHERNET,
+					    &zero_addr,
+					    sw_if_index);
+      gre_update_adj(vnm, t->sw_if_index, t->l2_adj_index);
+  }
+
+  if (sw_if_indexp)
+    *sw_if_indexp = sw_if_index;
+
+  return 0;
+}
+
+static int 
+vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t *a,
+                        u32 * sw_if_indexp)
+{
+  gre_main_t * gm = &gre_main;
+  vnet_main_t * vnm = gm->vnet_main;
+  gre_tunnel_t * t;
+  u32 sw_if_index;
+
+  t = gre_tunnel_db_find(&a->src, &a->dst, a->outer_fib_id);
+
+  if (NULL == t)
+    return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+  sw_if_index = t->sw_if_index;
+  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */);
+  /* make sure tunnel is removed from l2 bd or xconnect */
+  set_int_l2_mode(gm->vlib_main, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
+  vec_add1 (gm->free_gre_tunnel_hw_if_indices[t->type], t->hw_if_index);
+  gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
+
+  if (GRE_TUNNEL_TYPE_TEB == t->type)
+    adj_unlock(t->l2_adj_index);
+
+  if (t->l2_adj_index != ADJ_INDEX_INVALID)
+      adj_unlock(t->l2_adj_index);
+
+  fib_entry_child_remove(t->fib_entry_index,
+                         t->sibling_index);
+  fib_table_entry_delete_index(t->fib_entry_index,
+                               FIB_SOURCE_RR);
+
+  gre_tunnel_db_remove(t);
+  fib_node_deinit(&t->node);
+  pool_put (gm->tunnels, t);
+
+  if (sw_if_indexp)
+    *sw_if_indexp = sw_if_index;
+
+  return 0;
+}
+
+int
+vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t *a,
+                         u32 * sw_if_indexp)
+{
+  if (a->is_add)
+    return (vnet_gre_tunnel_add(a, sw_if_indexp));
+  else
+    return (vnet_gre_tunnel_delete(a, sw_if_indexp));
+}
+
+clib_error_t *
+gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+  gre_main_t * gm = &gre_main;
+  vnet_hw_interface_t * hi;
+  gre_tunnel_t *t;
+  u32 ti;
+
+  hi = vnet_get_hw_interface (vnm, hw_if_index);
+
+  if (NULL == gm->tunnel_index_by_sw_if_index ||
+      hi->sw_if_index >= vec_len(gm->tunnel_index_by_sw_if_index))
+      return (NULL);
+
+  ti = gm->tunnel_index_by_sw_if_index[hi->sw_if_index];
+
+  if (~0 == ti)
+      /* not one of ours */
+      return (NULL);
+
+  t = pool_elt_at_index(gm->tunnels, ti);
+
+  if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
+    vnet_hw_interface_set_flags (vnm, hw_if_index, VNET_HW_INTERFACE_FLAG_LINK_UP);
+  else
+    vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */);
+
+  gre_tunnel_restack(t);
+
+  return /* no error */ 0;
+}
+
+static clib_error_t *
+create_gre_tunnel_command_fn (vlib_main_t * vm,
+		 unformat_input_t * input,
+		 vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, * line_input = &_line_input;
+  vnet_gre_add_del_tunnel_args_t _a, * a = &_a;
+  ip4_address_t src, dst;
+  u32 outer_fib_id = 0;
+  u8 teb = 0;
+  int rv;
+  u32 num_m_args = 0;
+  u8 is_add = 1;
+  u32 sw_if_index;
+
+  /* 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, "del"))
+      is_add = 0;
+    else if (unformat (line_input, "src %U", unformat_ip4_address, &src))
+      num_m_args++;
+    else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst))
+      num_m_args++;
+    else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
+      ;
+    else if (unformat (line_input, "teb"))
+      teb = 1;
+    else
+      return clib_error_return (0, "unknown input `%U'",
+                                format_unformat_error, input);
+  }
+  unformat_free (line_input);
+
+  if (num_m_args < 2)
+      return clib_error_return (0, "mandatory argument(s) missing");
+
+  if (memcmp (&src, &dst, sizeof(src)) == 0)
+      return clib_error_return (0, "src and dst are identical");
+
+  memset (a, 0, sizeof (*a));
+  a->outer_fib_id = outer_fib_id;
+  a->teb = teb;
+  clib_memcpy(&a->src, &src, sizeof(src));
+  clib_memcpy(&a->dst, &dst, sizeof(dst));
+
+  if (is_add)
+    rv = vnet_gre_tunnel_add(a, &sw_if_index);
+  else
+    rv = vnet_gre_tunnel_delete(a, &sw_if_index);
+
+  switch(rv)
+    {
+    case 0:
+      vlib_cli_output(vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main(), sw_if_index);
+      break;
+    case VNET_API_ERROR_INVALID_VALUE:
+      return clib_error_return (0, "GRE tunnel already exists...");
+    case VNET_API_ERROR_NO_SUCH_FIB:
+      return clib_error_return (0, "outer fib ID %d doesn't exist\n",
+                                outer_fib_id);
+    default:
+      return clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
+    }
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
+  .path = "create gre tunnel",
+  .short_help = "create gre tunnel src <addr> dst <addr> "
+                "[outer-fib-id <fib>] [teb] [del]",
+  .function = create_gre_tunnel_command_fn,
+};
+
+static clib_error_t *
+show_gre_tunnel_command_fn (vlib_main_t * vm,
+                            unformat_input_t * input,
+                            vlib_cli_command_t * cmd)
+{
+  gre_main_t * gm = &gre_main;
+  gre_tunnel_t * t;
+  u32 ti = ~0;
+
+  if (pool_elts (gm->tunnels) == 0)
+    vlib_cli_output (vm, "No GRE tunnels configured...");
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "%d", &ti))
+        ;
+      else
+        break;
+    }
+
+  if (~0 == ti)
+    {
+      pool_foreach (t, gm->tunnels,
+      ({
+          vlib_cli_output (vm, "%U", format_gre_tunnel, t);
+      }));
+    }
+  else
+  {
+      t = pool_elt_at_index(gm->tunnels, ti);
+
+      vlib_cli_output (vm, "%U", format_gre_tunnel, t);
+  }
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
+    .path = "show gre tunnel",
+    .function = show_gre_tunnel_command_fn,
+};
+
+/* force inclusion from application's main.c */
+clib_error_t *gre_interface_init (vlib_main_t *vm)
+{
+  fib_node_register_type(FIB_NODE_TYPE_GRE_TUNNEL, &gre_vft);
+
+  return 0;
+}
+VLIB_INIT_FUNCTION(gre_interface_init);