Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2018 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 <vnet/vnet.h>
      17             : #include <vnet/ip/ip.h>
      18             : #include <vnet/ethernet/ethernet.h>
      19             : #include <vnet/flow/flow.h>
      20             : 
      21             : vnet_flow_main_t flow_main;
      22             : 
      23             : int
      24        1118 : vnet_flow_get_range (vnet_main_t * vnm, char *owner, u32 count, u32 * start)
      25             : {
      26        1118 :   vnet_flow_main_t *fm = &flow_main;
      27             :   vnet_flow_range_t *r;
      28             : 
      29             :   /* skip 0 */
      30        1118 :   if (fm->flows_used == 0)
      31         559 :     fm->flows_used = 1;
      32             : 
      33        1118 :   *start = fm->flows_used;
      34        1118 :   fm->flows_used += count;
      35        1118 :   vec_add2 (fm->ranges, r, 1);
      36        1118 :   r->start = *start;
      37        1118 :   r->count = count;
      38        1118 :   r->owner = format (0, "%s%c", owner, 0);
      39        1118 :   return 0;
      40             : }
      41             : 
      42             : int
      43           0 : vnet_flow_add (vnet_main_t * vnm, vnet_flow_t * flow, u32 * flow_index)
      44             : {
      45           0 :   vnet_flow_main_t *fm = &flow_main;
      46             :   vnet_flow_t *f;
      47             : 
      48           0 :   pool_get (fm->global_flow_pool, f);
      49           0 :   *flow_index = f - fm->global_flow_pool;
      50           0 :   clib_memcpy_fast (f, flow, sizeof (vnet_flow_t));
      51           0 :   f->private_data = 0;
      52           0 :   f->index = *flow_index;
      53           0 :   return 0;
      54             : }
      55             : 
      56             : vnet_flow_t *
      57           0 : vnet_get_flow (u32 flow_index)
      58             : {
      59           0 :   vnet_flow_main_t *fm = &flow_main;
      60           0 :   if (pool_is_free_index (fm->global_flow_pool, flow_index))
      61           0 :     return 0;
      62             : 
      63           0 :   return pool_elt_at_index (fm->global_flow_pool, flow_index);
      64             : }
      65             : 
      66             : int
      67           0 : vnet_flow_del (vnet_main_t * vnm, u32 flow_index)
      68             : {
      69           0 :   vnet_flow_main_t *fm = &flow_main;
      70           0 :   vnet_flow_t *f = vnet_get_flow (flow_index);
      71             :   uword hw_if_index;
      72             :   uword private_data;
      73             : 
      74           0 :   if (f == 0)
      75           0 :     return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
      76             : 
      77             :   /* *INDENT-OFF* */
      78           0 :   hash_foreach (hw_if_index, private_data, f->private_data,
      79             :     ({
      80             :      vnet_flow_disable (vnm, flow_index, hw_if_index);
      81             :     }));
      82             :   /* *INDENT-ON* */
      83             : 
      84           0 :   hash_free (f->private_data);
      85           0 :   clib_memset (f, 0, sizeof (*f));
      86           0 :   pool_put (fm->global_flow_pool, f);
      87           0 :   return 0;
      88             : }
      89             : 
      90             : int
      91           0 : vnet_flow_enable (vnet_main_t * vnm, u32 flow_index, u32 hw_if_index)
      92             : {
      93           0 :   vnet_flow_t *f = vnet_get_flow (flow_index);
      94             :   vnet_hw_interface_t *hi;
      95             :   vnet_device_class_t *dev_class;
      96             :   uword private_data;
      97             :   int rv;
      98             : 
      99           0 :   if (f == 0)
     100           0 :     return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
     101             : 
     102           0 :   if (!vnet_hw_interface_is_valid (vnm, hw_if_index))
     103           0 :     return VNET_FLOW_ERROR_NO_SUCH_INTERFACE;
     104             : 
     105             :   /* don't enable flow twice */
     106           0 :   if (hash_get (f->private_data, hw_if_index) != 0)
     107           0 :     return VNET_FLOW_ERROR_ALREADY_DONE;
     108             : 
     109           0 :   hi = vnet_get_hw_interface (vnm, hw_if_index);
     110           0 :   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
     111             : 
     112           0 :   if (dev_class->flow_ops_function == 0)
     113           0 :     return VNET_FLOW_ERROR_NOT_SUPPORTED;
     114             : 
     115           0 :   if (f->actions & VNET_FLOW_ACTION_REDIRECT_TO_NODE)
     116             :     {
     117           0 :       vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
     118           0 :       f->redirect_device_input_next_index =
     119           0 :         vlib_node_add_next (vnm->vlib_main, hw->input_node_index,
     120           0 :                             f->redirect_node_index);
     121             :     }
     122             : 
     123           0 :   rv = dev_class->flow_ops_function (vnm, VNET_FLOW_DEV_OP_ADD_FLOW,
     124             :                                      hi->dev_instance, flow_index,
     125             :                                      &private_data);
     126             : 
     127           0 :   if (rv)
     128           0 :     return rv;
     129             : 
     130           0 :   hash_set (f->private_data, hw_if_index, private_data);
     131           0 :   return 0;
     132             : }
     133             : 
     134             : int
     135           0 : vnet_flow_disable (vnet_main_t * vnm, u32 flow_index, u32 hw_if_index)
     136             : {
     137           0 :   vnet_flow_t *f = vnet_get_flow (flow_index);
     138             :   vnet_hw_interface_t *hi;
     139             :   vnet_device_class_t *dev_class;
     140             :   uword *p;
     141             :   int rv;
     142             : 
     143           0 :   if (f == 0)
     144           0 :     return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
     145             : 
     146           0 :   if (!vnet_hw_interface_is_valid (vnm, hw_if_index))
     147           0 :     return VNET_FLOW_ERROR_NO_SUCH_INTERFACE;
     148             : 
     149             :   /* don't disable if not enabled */
     150           0 :   if ((p = hash_get (f->private_data, hw_if_index)) == 0)
     151           0 :     return VNET_FLOW_ERROR_ALREADY_DONE;
     152             : 
     153           0 :   hi = vnet_get_hw_interface (vnm, hw_if_index);
     154           0 :   dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
     155             : 
     156           0 :   rv = dev_class->flow_ops_function (vnm, VNET_FLOW_DEV_OP_DEL_FLOW,
     157             :                                      hi->dev_instance, flow_index, p);
     158             : 
     159           0 :   if (rv)
     160           0 :     return rv;
     161             : 
     162           0 :   hash_unset (f->private_data, hw_if_index);
     163           0 :   return 0;
     164             : }
     165             : 
     166             : /*
     167             :  * fd.io coding-style-patch-verification: ON
     168             :  *
     169             :  * Local Variables:
     170             :  * eval: (c-set-style "gnu")
     171             :  * End:
     172             :  */