vnet/vnet/span/span.c

   1 /*
   2  * Copyright (c) 2016 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 <vlib/vlib.h>
  17 #include <vppinfra/error.h>
  18 #include <vnet/feature/feature.h>
  19
  20 #include <vnet/span/span.h>
  21
  22 int
  23 span_add_delete_entry (vlib_main_t * vm,
  24                        u32 src_sw_if_index, u32 dst_sw_if_index, u8 is_add)
  25 {
  26   span_main_t *sm = &span_main;
  27
  28   if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && is_add)
  29       || (src_sw_if_index == dst_sw_if_index))
  30     return VNET_API_ERROR_INVALID_INTERFACE;
  31
  32   vnet_sw_interface_t *sw =
  33     vnet_get_sw_interface (sm->vnet_main, src_sw_if_index);
  34
  35   vec_validate_aligned (sm->dst_by_src_sw_if_index, sw->hw_if_index,
  36                         CLIB_CACHE_LINE_BYTES);
  37   sm->dst_by_src_sw_if_index[sw->hw_if_index] = is_add ? dst_sw_if_index : 0;
  38   vnet_feature_enable_disable ("device-input", "span-input",
  39                                sw->hw_if_index, is_add, 0, 0);
  40   return 0;
  41 }
  42
  43 static clib_error_t *
  44 set_interface_span_command_fn (vlib_main_t * vm,
  45                                unformat_input_t * input,
  46                                vlib_cli_command_t * cmd)
  47 {
  48   span_main_t *sm = &span_main;
  49   u32 src_sw_if_index = ~0;
  50   u32 dst_sw_if_index = ~0;
  51   u8 is_add = 1;
  52
  53   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
  54     {
  55       if (unformat (input, "%U", unformat_vnet_sw_interface,
  56                     sm->vnet_main, &src_sw_if_index))
  57         ;
  58       else if (unformat (input, "destination %U", unformat_vnet_sw_interface,
  59                          sm->vnet_main, &dst_sw_if_index))
  60         ;
  61       else if (unformat (input, "disable"))
  62         is_add = 0;
  63       else
  64         break;
  65     }
  66
  67   int rv =
  68     span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, is_add);
  69   if (rv == VNET_API_ERROR_INVALID_INTERFACE)
  70     return clib_error_return (0, "Invalid interface");
  71   return 0;
  72 }
  73
  74 /* *INDENT-OFF* */
  75 VLIB_CLI_COMMAND (set_interface_span_command, static) = {
  76   .path = "set interface span",
  77   .short_help = "set interface span <if-name> [disable | destination <if-name>]",
  78   .function = set_interface_span_command_fn,
  79 };
  80 /* *INDENT-ON* */
  81
  82 static clib_error_t *
  83 show_interfaces_span_command_fn (vlib_main_t * vm,
  84                                  unformat_input_t * input,
  85                                  vlib_cli_command_t * cmd)
  86 {
  87
  88   span_main_t *sm = &span_main;
  89   vnet_main_t *vnm = &vnet_main;
  90   u32 src_sw_if_index = 0, *dst_sw_if_index;
  91   u8 header = 1;
  92
  93   vec_foreach (dst_sw_if_index, sm->dst_by_src_sw_if_index)
  94   {
  95     if (*dst_sw_if_index > 0)   // && *dst_sw_if_index != ~0)
  96       {
  97         if (header)
  98           {
  99             vlib_cli_output (vm,
 100                              "SPAN source interface to destination interface table");
 101             header = 0;
 102           }
 103         vlib_cli_output (vm, "%32U => %-32U",
 104                          format_vnet_sw_if_index_name, vnm, src_sw_if_index,
 105                          format_vnet_sw_if_index_name, vnm, *dst_sw_if_index);
 106       }
 107     src_sw_if_index++;
 108   }
 109   return 0;
 110 }
 111
 112 /* *INDENT-OFF* */
 113 VLIB_CLI_COMMAND (show_interfaces_span_command, static) = {
 114   .path = "show interfaces span",
 115   .short_help = "Shows SPAN mirror table",
 116   .function = show_interfaces_span_command_fn,
 117 };
 118 /* *INDENT-ON* */
 119
 120 static clib_error_t *
 121 span_init (vlib_main_t * vm)
 122 {
 123   span_main_t *sm = &span_main;
 124
 125   sm->vlib_main = vm;
 126   sm->vnet_main = vnet_get_main ();
 127
 128   return 0;
 129 }
 130
 131 VLIB_INIT_FUNCTION (span_init);
 132
 133 /*
 134  * fd.io coding-style-patch-verification: ON
 135  *
 136  * Local Variables:
 137  * eval: (c-set-style "gnu")
 138  * End:
 139  */