extras/vom/vom/tap_interface.cpp

   1 /*
   2  * Copyright (c) 2017 Cisco and/or its affiliates.
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include "vom/tap_interface.hpp"
  17 #include "vom/tap_interface_cmds.hpp"
  18
  19 #include <vapi/vpe.api.vapi.hpp>
  20
  21 namespace VOM {
  22 tap_interface::event_handler tap_interface::m_evh;
  23
  24 /**
  25  * Construct a new object matching the desried state
  26  */
  27 tap_interface::tap_interface(const std::string& name,
  28                              admin_state_t state,
  29                              route::prefix_t prefix)
  30   : interface(name, type_t::TAP, state)
  31   , m_prefix(prefix)
  32   , m_l2_address(l2_address_t::ZERO)
  33 {
  34 }
  35
  36 tap_interface::tap_interface(const std::string& name,
  37                              admin_state_t state,
  38                              route::prefix_t prefix,
  39                              const l2_address_t& l2_address)
  40   : interface(name, type_t::TAP, state)
  41   , m_prefix(prefix)
  42   , m_l2_address(l2_address)
  43 {
  44 }
  45
  46 tap_interface::~tap_interface()
  47 {
  48   sweep();
  49   release();
  50 }
  51
  52 tap_interface::tap_interface(const tap_interface& o)
  53   : interface(o)
  54   , m_prefix(o.m_prefix)
  55   , m_l2_address(o.m_l2_address)
  56 {
  57 }
  58
  59 std::queue<cmd*>&
  60 tap_interface::mk_create_cmd(std::queue<cmd*>& q)
  61 {
  62   q.push(
  63     new tap_interface_cmds::create_cmd(m_hdl, name(), m_prefix, m_l2_address));
  64
  65   return (q);
  66 }
  67
  68 std::queue<cmd*>&
  69 tap_interface::mk_delete_cmd(std::queue<cmd*>& q)
  70 {
  71   q.push(new tap_interface_cmds::delete_cmd(m_hdl));
  72
  73   return (q);
  74 }
  75
  76 std::shared_ptr<tap_interface>
  77 tap_interface::singular() const
  78 {
  79   return std::dynamic_pointer_cast<tap_interface>(singular_i());
  80 }
  81
  82 std::shared_ptr<interface>
  83 tap_interface::singular_i() const
  84 {
  85   return m_db.find_or_add(name(), *this);
  86 }
  87
  88 void
  89 tap_interface::event_handler::handle_populate(const client_db::key_t& key)
  90 {
  91   /*
  92    * dump VPP current states
  93    */
  94   std::shared_ptr<tap_interface_cmds::dump_cmd> cmd =
  95     std::make_shared<tap_interface_cmds::dump_cmd>();
  96
  97   HW::enqueue(cmd);
  98   HW::write();
  99
 100   for (auto& record : *cmd) {
 101     auto& payload = record.get_payload();
 102
 103     std::string name = reinterpret_cast<const char*>(payload.dev_name);
 104
 105     tap_interface itf(name, interface::admin_state_t::UP,
 106                       route::prefix_t::ZERO);
 107
 108     VOM_LOG(log_level_t::DEBUG) << "tap-dump: " << itf.to_string();
 109
 110     /*
 111      * Write each of the discovered interfaces into the OM,
 112      * but disable the HW Command q whilst we do, so that no
 113      * commands are sent to VPP
 114      */
 115     OM::commit(key, itf);
 116   }
 117 }
 118
 119 tap_interface::event_handler::event_handler()
 120 {
 121   OM::register_listener(this);
 122   inspect::register_handler({ "tap" }, "tap_interfaces", this);
 123 }
 124
 125 void
 126 tap_interface::event_handler::handle_replay()
 127 {
 128   // It will be replayed by interface handler
 129 }
 130
 131 dependency_t
 132 tap_interface::event_handler::order() const
 133 {
 134   return (dependency_t::INTERFACE);
 135 }
 136
 137 void
 138 tap_interface::event_handler::show(std::ostream& os)
 139 {
 140   // dumped by the interface handler
 141 }
 142
 143 }; // namespace VOM
 144
 145 /*
 146  * fd.io coding-style-patch-verification: ON
 147  *
 148  * Local Variables:
 149  * eval: (c-set-style "mozilla")
 150  * End:
 151  */