src/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 state)
  25 {
  26   span_main_t *sm = &span_main;
  27   span_interface_t *si;
  28   u32 new_num_rx_mirror_ports, new_num_tx_mirror_ports;
  29
  30   if (state > 3)
  31     return VNET_API_ERROR_UNIMPLEMENTED;
  32
  33   if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && state > 0)
  34       || (src_sw_if_index == dst_sw_if_index))
  35     return VNET_API_ERROR_INVALID_INTERFACE;
  36
  37   vnet_sw_interface_t *sw_if;
  38
  39   sw_if = vnet_get_sw_interface (vnet_get_main (), src_sw_if_index);
  40   if (sw_if->type == VNET_SW_INTERFACE_TYPE_SUB)
  41     return VNET_API_ERROR_UNIMPLEMENTED;
  42
  43   vec_validate_aligned (sm->interfaces, src_sw_if_index,
  44                         CLIB_CACHE_LINE_BYTES);
  45   si = vec_elt_at_index (sm->interfaces, src_sw_if_index);
  46
  47   si->rx_mirror_ports = clib_bitmap_set (si->rx_mirror_ports, dst_sw_if_index,
  48                                          (state & 1) != 0);
  49   si->tx_mirror_ports = clib_bitmap_set (si->tx_mirror_ports, dst_sw_if_index,
  50                                          (state & 2) != 0);
  51
  52   new_num_rx_mirror_ports = clib_bitmap_count_set_bits (si->rx_mirror_ports);
  53   new_num_tx_mirror_ports = clib_bitmap_count_set_bits (si->tx_mirror_ports);
  54
  55   if (new_num_rx_mirror_ports == 1 && si->num_rx_mirror_ports == 0)
  56     vnet_feature_enable_disable ("device-input", "span-input",
  57                                  src_sw_if_index, 1, 0, 0);
  58
  59   if (new_num_rx_mirror_ports == 0 && si->num_rx_mirror_ports == 1)
  60     vnet_feature_enable_disable ("device-input", "span-input",
  61                                  src_sw_if_index, 0, 0, 0);
  62
  63   if (new_num_rx_mirror_ports == 1 && si->num_rx_mirror_ports == 0)
  64     vnet_feature_enable_disable ("device-input", "span-output",
  65                                  src_sw_if_index, 1, 0, 0);
  66
  67   if (new_num_rx_mirror_ports == 0 && si->num_rx_mirror_ports == 1)
  68     vnet_feature_enable_disable ("device-input", "span-output",
  69                                  src_sw_if_index, 0, 0, 0);
  70
  71   si->num_rx_mirror_ports = new_num_rx_mirror_ports;
  72   si->num_tx_mirror_ports = new_num_tx_mirror_ports;
  73
  74   if (dst_sw_if_index > sm->max_sw_if_index)
  75     sm->max_sw_if_index = dst_sw_if_index;
  76
  77   return 0;
  78 }
  79
  80 static clib_error_t *
  81 set_interface_span_command_fn (vlib_main_t * vm,
  82                                unformat_input_t * input,
  83                                vlib_cli_command_t * cmd)
  84 {
  85   span_main_t *sm = &span_main;
  86   u32 src_sw_if_index = ~0;
  87   u32 dst_sw_if_index = ~0;
  88   u8 state = 3;
  89
  90   while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
  91     {
  92       if (unformat (input, "%U", unformat_vnet_sw_interface,
  93                     sm->vnet_main, &src_sw_if_index))
  94         ;
  95       else if (unformat (input, "destination %U", unformat_vnet_sw_interface,
  96                          sm->vnet_main, &dst_sw_if_index))
  97         ;
  98       else if (unformat (input, "disable"))
  99         state = 0;
 100       else if (unformat (input, "rx"))
 101         state = 1;
 102       else if (unformat (input, "tx"))
 103         state = 2;
 104       else if (unformat (input, "both"))
 105         state = 3;
 106       else
 107         break;
 108     }
 109
 110   int rv =
 111     span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, state);
 112   if (rv == VNET_API_ERROR_INVALID_INTERFACE)
 113     return clib_error_return (0, "Invalid interface");
 114   return 0;
 115 }
 116
 117 /* *INDENT-OFF* */
 118 VLIB_CLI_COMMAND (set_interface_span_command, static) = {
 119   .path = "set interface span",
 120   .short_help = "set interface span <if-name> [disable | destination <if-name> [both|rx|tx]]",
 121   .function = set_interface_span_command_fn,
 122 };
 123 /* *INDENT-ON* */
 124
 125 static clib_error_t *
 126 show_interfaces_span_command_fn (vlib_main_t * vm,
 127                                  unformat_input_t * input,
 128                                  vlib_cli_command_t * cmd)
 129 {
 130   span_main_t *sm = &span_main;
 131   span_interface_t *si;
 132   vnet_main_t *vnm = &vnet_main;
 133   u8 header = 1;
 134   char *states[] = { "none", "rx", "tx", "both" };
 135   u8 *s = 0;
 136
 137   /* *INDENT-OFF* */
 138   vec_foreach (si, sm->interfaces)
 139     if (si->num_rx_mirror_ports || si->num_tx_mirror_ports)
 140       {
 141         clib_bitmap_t *b;
 142         u32 i;
 143         b = clib_bitmap_dup_or (si->rx_mirror_ports, si->tx_mirror_ports);
 144         if (header)
 145           {
 146             vlib_cli_output (vm, "%-40s %s", "Source interface",
 147                              "Mirror interface (direction)");
 148             header = 0;
 149           }
 150         s = format (s, "%U", format_vnet_sw_if_index_name, vnm,
 151                     si - sm->interfaces);
 152         clib_bitmap_foreach (i, b, (
 153           {
 154             int state;
 155             state = (clib_bitmap_get (si->rx_mirror_ports, i) +
 156                      clib_bitmap_get (si->tx_mirror_ports, i) * 2);
 157
 158             vlib_cli_output (vm, "%-40v %U (%s)", s,
 159                              format_vnet_sw_if_index_name, vnm, i,
 160                              states[state]);
 161             vec_reset_length (s);
 162           }));
 163         clib_bitmap_free (b);
 164       }
 165   /* *INDENT-ON* */
 166   vec_free (s);
 167   return 0;
 168 }
 169
 170 /* *INDENT-OFF* */
 171 VLIB_CLI_COMMAND (show_interfaces_span_command, static) = {
 172   .path = "show interfaces span",
 173   .short_help = "Shows SPAN mirror table",
 174   .function = show_interfaces_span_command_fn,
 175 };
 176 /* *INDENT-ON* */
 177
 178 static clib_error_t *
 179 span_init (vlib_main_t * vm)
 180 {
 181   span_main_t *sm = &span_main;
 182
 183   sm->vlib_main = vm;
 184   sm->vnet_main = vnet_get_main ();
 185
 186   return 0;
 187 }
 188
 189 VLIB_INIT_FUNCTION (span_init);
 190
 191 /*
 192  * fd.io coding-style-patch-verification: ON
 193  *
 194  * Local Variables:
 195  * eval: (c-set-style "gnu")
 196  * End:
 197  */