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authorNeale Ranns <nranns@cisco.com>2017-03-01 15:12:11 -0800
committerNeale Ranns <nranns@cisco.com>2017-04-07 09:12:12 +0000
commit0f26c5a0138ac86d7ebd197c31a09d8d624c35fe (patch)
tree5cee4659885432c439e44d7346fd5e482df5f0e6 /src/vnet/adj/adj_mcast.c
parentc14f31c2c62fb66d98aef4402a6f1bda09683fd3 (diff)
MPLS Mcast
1 - interface-DPO Used in the Data-plane to change a packet's input interface 2 - MPLS multicast FIB entry Same as a unicast entry but it links to a replicate not a load-balance DPO 3 - Multicast MPLS tunnel Update MPLS tunnels to use a FIB path-list to describe the endpoint[s]. Use the path-list to generate the forwarding chain (DPOs) to link to . 4 - Resolve a path via a local label (of an mLDP LSP) For IP multicast entries to use an LSP in the replication list, we need to decribe the 'resolve-via-label' where the label is that of a multicast LSP. 5 - MPLS disposition path sets RPF-ID For a interface-less LSP (i.e. mLDP not RSVP-TE) at the tail of the LSP we still need to perform an RPF check. An MPLS disposition DPO performs the MPLS pop validation checks and sets the RPF-ID in the packet. 6 - RPF check with per-entry RPF-ID An RPF-ID is used instead of a real interface SW if index in the case the IP traffic arrives from an LSP that does not have an associated interface. Change-Id: Ib92e177be919147bafeb599729abf3d1abc2f4b3 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/adj/adj_mcast.c')
-rw-r--r--src/vnet/adj/adj_mcast.c134
1 files changed, 132 insertions, 2 deletions
diff --git a/src/vnet/adj/adj_mcast.c b/src/vnet/adj/adj_mcast.c
index 4f678e43e80..755abfd4639 100644
--- a/src/vnet/adj/adj_mcast.c
+++ b/src/vnet/adj/adj_mcast.c
@@ -13,7 +13,7 @@
* limitations under the License.
*/
-#include <vnet/adj/adj.h>
+#include <vnet/adj/adj_mcast.h>
#include <vnet/adj/adj_internal.h>
#include <vnet/fib/fib_walk.h>
#include <vnet/ip/ip.h>
@@ -129,6 +129,59 @@ adj_mcast_update_rewrite (adj_index_t adj_index,
adj->rewrite_header.dst_mcast_mask = clib_host_to_net_u32(mask);
}
+/**
+ * adj_mcast_midchain_update_rewrite
+ *
+ * Update the adjacency's rewrite string. A NULL string implies the
+ * rewirte is reset (i.e. when ARP/ND etnry is gone).
+ * NB: the adj being updated may be handling traffic in the DP.
+ */
+void
+adj_mcast_midchain_update_rewrite (adj_index_t adj_index,
+ adj_midchain_fixup_t fixup,
+ adj_flags_t flags,
+ u8 *rewrite,
+ u8 offset,
+ u32 mask)
+{
+ ip_adjacency_t *adj;
+
+ ASSERT(ADJ_INDEX_INVALID != adj_index);
+
+ adj = adj_get(adj_index);
+
+ /*
+ * one time only update. since we don't support chainging the tunnel
+ * src,dst, this is all we need.
+ */
+ ASSERT(adj->lookup_next_index == IP_LOOKUP_NEXT_MCAST);
+ /*
+ * tunnels can always provide a rewrite.
+ */
+ ASSERT(NULL != rewrite);
+
+ adj_midchain_setup(adj_index, fixup, flags);
+
+ /*
+ * update the adj's rewrite string and build the arc
+ * from the rewrite node to the interface's TX node
+ */
+ adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_MCAST_MIDCHAIN,
+ adj_get_mcast_node(adj->ia_nh_proto),
+ vnet_tx_node_index_for_sw_interface(
+ vnet_get_main(),
+ adj->rewrite_header.sw_if_index),
+ rewrite);
+
+ /*
+ * set the fields corresponding to the mcast IP address rewrite
+ * The mask must be stored in network byte order, since the packet's
+ * IP address will also be in network order.
+ */
+ adj->rewrite_header.dst_mcast_offset = offset;
+ adj->rewrite_header.dst_mcast_mask = clib_host_to_net_u32(mask);
+}
+
void
adj_mcast_remove (fib_protocol_t proto,
u32 sw_if_index)
@@ -260,6 +313,24 @@ adj_mcast_interface_delete (vnet_main_t * vnm,
VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_mcast_interface_delete);
+/**
+ * @brief Walk the multicast Adjacencies on a given interface
+ */
+void
+adj_mcast_walk (u32 sw_if_index,
+ fib_protocol_t proto,
+ adj_walk_cb_t cb,
+ void *ctx)
+{
+ if (vec_len(adj_mcasts[proto]) > sw_if_index)
+ {
+ if (ADJ_INDEX_INVALID != adj_mcasts[proto][sw_if_index])
+ {
+ cb(adj_mcasts[proto][sw_if_index], ctx);
+ }
+ }
+}
+
u8*
format_adj_mcast (u8* s, va_list *ap)
{
@@ -269,6 +340,8 @@ format_adj_mcast (u8* s, va_list *ap)
s = format(s, "%U-mcast: ",
format_fib_protocol, adj->ia_nh_proto);
+ if (adj->rewrite_header.flags & VNET_REWRITE_HAS_FEATURES)
+ s = format(s, "[features] ");
s = format (s, "%U",
format_vnet_rewrite,
&adj->rewrite_header, sizeof (adj->rewrite_data), 0);
@@ -276,6 +349,28 @@ format_adj_mcast (u8* s, va_list *ap)
return (s);
}
+u8*
+format_adj_mcast_midchain (u8* s, va_list *ap)
+{
+ index_t index = va_arg(*ap, index_t);
+ CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
+ vnet_main_t * vnm = vnet_get_main();
+ ip_adjacency_t * adj = adj_get(index);
+
+ s = format(s, "%U-mcast-midchain: ",
+ format_fib_protocol, adj->ia_nh_proto);
+ s = format (s, "%U",
+ format_vnet_rewrite,
+ vnm->vlib_main, &adj->rewrite_header,
+ sizeof (adj->rewrite_data), 0);
+ s = format (s, "\n%Ustacked-on:\n%U%U",
+ format_white_space, indent,
+ format_white_space, indent+2,
+ format_dpo_id, &adj->sub_type.midchain.next_dpo, indent+2);
+
+ return (s);
+}
+
static void
adj_dpo_lock (dpo_id_t *dpo)
@@ -293,6 +388,11 @@ const static dpo_vft_t adj_mcast_dpo_vft = {
.dv_unlock = adj_dpo_unlock,
.dv_format = format_adj_mcast,
};
+const static dpo_vft_t adj_mcast_midchain_dpo_vft = {
+ .dv_lock = adj_dpo_lock,
+ .dv_unlock = adj_dpo_unlock,
+ .dv_format = format_adj_mcast_midchain,
+};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a mcast
@@ -320,6 +420,31 @@ const static char* const * const adj_mcast_nodes[DPO_PROTO_NUM] =
};
/**
+ * @brief The per-protocol VLIB graph nodes that are assigned to a mcast
+ * object.
+ *
+ * this means that these graph nodes are ones from which a mcast is the
+ * parent object in the DPO-graph.
+ */
+const static char* const adj_mcast_midchain_ip4_nodes[] =
+{
+ "ip4-mcast-midchain",
+ NULL,
+};
+const static char* const adj_mcast_midchain_ip6_nodes[] =
+{
+ "ip6-mcast-midchain",
+ NULL,
+};
+
+const static char* const * const adj_mcast_midchain_nodes[DPO_PROTO_NUM] =
+{
+ [DPO_PROTO_IP4] = adj_mcast_midchain_ip4_nodes,
+ [DPO_PROTO_IP6] = adj_mcast_midchain_ip6_nodes,
+ [DPO_PROTO_MPLS] = NULL,
+};
+
+/**
* @brief Return the size of the adj DB.
* This is only for testing purposes so an efficient implementation is not needed
*/
@@ -349,5 +474,10 @@ adj_mcast_db_size (void)
void
adj_mcast_module_init (void)
{
- dpo_register(DPO_ADJACENCY_MCAST, &adj_mcast_dpo_vft, adj_mcast_nodes);
+ dpo_register(DPO_ADJACENCY_MCAST,
+ &adj_mcast_dpo_vft,
+ adj_mcast_nodes);
+ dpo_register(DPO_ADJACENCY_MCAST_MIDCHAIN,
+ &adj_mcast_midchain_dpo_vft,
+ adj_mcast_midchain_nodes);
}
olor: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */ } 
/*
 * Copyright (c) 2018 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 "vom/acl_ethertype.hpp"
#include "vom/acl_ethertype_cmds.hpp"

namespace VOM {
namespace ACL {

ethertype_rule_t::ethertype_rule_t(const ethertype_t& eth,
                                   const direction_t& dir)
  : m_eth(eth)
  , m_dir(dir)
{
}

std::string
ethertype_rule_t::to_string() const
{
  std::ostringstream s;

  s << "["
    << "ethertype:" << m_eth.to_string() << " dir:" << m_dir.to_string()
    << "],";

  return (s.str());
}

bool
ethertype_rule_t::operator<(const ethertype_rule_t& other) const
{
  return (m_dir > other.m_dir);
}

bool
ethertype_rule_t::operator==(const ethertype_rule_t& other) const
{
  return (m_dir == other.m_dir && m_eth == other.m_eth);
}

uint16_t
ethertype_rule_t::getEthertype() const
{
  return m_eth.value();
}

const direction_t&
ethertype_rule_t::getDirection() const
{
  return m_dir;
}

/**
 * A DB of all acl ethertype bindings configs
 */
singular_db<interface::key_t, acl_ethertype> acl_ethertype::m_db;

acl_ethertype::event_handler acl_ethertype::m_evh;

acl_ethertype::acl_ethertype(const interface& itf,
                             const acl_ethertype::ethertype_rules_t& le)
  : m_itf(itf.singular())
  , m_le(le)
  , m_binding(true)
{
}

acl_ethertype::acl_ethertype(const acl_ethertype& o)
  : m_itf(o.m_itf)
  , m_le(o.m_le)
  , m_binding(o.m_binding)
{
}

acl_ethertype::~acl_ethertype()
{
  sweep();

  // not in the DB anymore.
  m_db.release(m_itf->key(), this);
}

void
acl_ethertype::sweep()
{
  if (m_binding) {
    HW::enqueue(new acl_ethertype_cmds::unbind_cmd(m_binding, m_itf->handle()));
  }
  HW::write();
}

const acl_ethertype::key_t&
acl_ethertype::key() const
{
  return (m_itf->key());
}

bool
acl_ethertype::operator==(const acl_ethertype& other) const
{
  return (m_itf->key() == other.m_itf->key() && m_le == other.m_le);
}

std::shared_ptr<acl_ethertype>
acl_ethertype::find(const key_t& key)
{
  return (m_db.find(key));
}

void
acl_ethertype::dump(std::ostream& os)
{
  m_db.dump(os);
}

void
acl_ethertype::replay()
{
  if (m_binding) {
    HW::enqueue(
      new acl_ethertype_cmds::bind_cmd(m_binding, m_itf->handle(), m_le));
  }
}

std::string
acl_ethertype::to_string() const
{
  std::ostringstream s;
  s << "Acl-Ethertype:" << m_itf->to_string() << " ethertype-rules:";
  auto it = m_le.cbegin();
  while (it != m_le.cend()) {
    s << it->to_string();
    ++it;
  }
  s << " rules-size:" << m_le.size();

  return (s.str());
}

void
acl_ethertype::update(const acl_ethertype& desired)
{
  /*
   * always update the instance with the latest rules
   */
  if (!m_binding || desired.m_le != m_le) {
    HW::enqueue(
      new acl_ethertype_cmds::bind_cmd(m_binding, m_itf->handle(), m_le));
  }

  m_le = desired.m_le;
}

std::shared_ptr<acl_ethertype>
acl_ethertype::find_or_add(const acl_ethertype& temp)
{
  return (m_db.find_or_add(temp.m_itf->key(), temp));
}

std::shared_ptr<acl_ethertype>
acl_ethertype::singular() const
{
  return find_or_add(*this);
}

acl_ethertype::event_handler::event_handler()
{
  OM::register_listener(this);
  inspect::register_handler({ "acl-ethertype" }, "ACL Ethertype bindings",
                            this);
}

void
acl_ethertype::event_handler::handle_replay()
{
  m_db.replay();
}

void
acl_ethertype::event_handler::handle_populate(const client_db::key_t& key)
{
  /*
   * dump VPP acl ethertypes
   */
  std::shared_ptr<acl_ethertype_cmds::dump_cmd> cmd =
    std::make_shared<acl_ethertype_cmds::dump_cmd>(~0);

  HW::enqueue(cmd);
  HW::write();

  for (auto& record : *cmd) {
    auto& payload = record.get_payload();
    handle_t hdl(payload.sw_if_index);
    std::shared_ptr<interface> itf = interface::find(hdl);
    uint8_t n_input = payload.n_input;
    uint8_t count = payload.count;
    ethertype_rules_t ler;
    if (itf) {
      for (int i = 0; i < count; i++) {
        ethertype_t e = ethertype_t::from_numeric_val(payload.whitelist[i]);
        if (n_input) {
          ethertype_rule_t er(e, direction_t::INPUT);
          ler.insert(er);
          n_input--;
        } else {
          ethertype_rule_t er(e, direction_t::OUTPUT);
          ler.insert(er);
        }
      }
      if (!ler.empty()) {
        acl_ethertype a_e(*itf, ler);
        VOM_LOG(log_level_t::DEBUG) << "ethertype dump: " << a_e.to_string();
        OM::commit(key, a_e);
      }
    }
  }
}

dependency_t
acl_ethertype::event_handler::order() const
{
  return (dependency_t::BINDING);
}

void
acl_ethertype::event_handler::show(std::ostream& os)
{
  m_db.dump(os);
}
};
};
/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "mozilla")
 * End:
 */