lib/routing_nb_config.c

   1 /*
   2  * Copyright (C) 2018        Vmware
   3  *                           Vishal Dhingra
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; see the file COPYING; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include <zebra.h>
  21
  22 #include "northbound.h"
  23 #include "libfrr.h"
  24 #include "vrf.h"
  25 #include "lib_errors.h"
  26 #include "routing_nb.h"
  27
  28
  29 DEFINE_HOOK(routing_conf_event, (struct nb_cb_create_args *args), (args));
  30
  31 /*
  32  * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol
  33  */
  34
  35 int routing_control_plane_protocols_control_plane_protocol_create(
  36         struct nb_cb_create_args *args)
  37 {
  38         struct vrf *vrf;
  39         const char *vrfname;
  40
  41         switch (args->event) {
  42         case NB_EV_VALIDATE:
  43                 if (hook_call(routing_conf_event, args))
  44                         return NB_ERR_VALIDATION;
  45                 break;
  46         case NB_EV_PREPARE:
  47         case NB_EV_ABORT:
  48                 break;
  49         case NB_EV_APPLY:
  50                 /*
  51                  * If the daemon relies on the VRF pointer stored in this
  52                  * dnode, then it should register the dependency between this
  53                  * module and the VRF module using
  54                  * routing_control_plane_protocols_register_vrf_dependency.
  55                  * If such dependency is not registered, then nothing is
  56                  * stored in the dnode. If the dependency is registered,
  57                  * find the vrf and store the pointer.
  58                  */
  59                 if (nb_node_has_dependency(args->dnode->schema->priv)) {
  60                         vrfname = yang_dnode_get_string(args->dnode, "./vrf");
  61                         vrf = vrf_lookup_by_name(vrfname);
  62                         assert(vrf);
  63                         nb_running_set_entry(args->dnode, vrf);
  64                 }
  65                 break;
  66         };
  67
  68         return NB_OK;
  69 }
  70
  71 int routing_control_plane_protocols_control_plane_protocol_destroy(
  72         struct nb_cb_destroy_args *args)
  73 {
  74         if (args->event != NB_EV_APPLY)
  75                 return NB_OK;
  76
  77         /*
  78          * If dependency on VRF module is registered, then VRF
  79          * pointer was stored and must be cleared.
  80          */
  81         if (nb_node_has_dependency(args->dnode->schema->priv))
  82                 nb_running_unset_entry(args->dnode);
  83
  84         return NB_OK;
  85 }
  86
  87 static void vrf_to_control_plane_protocol(const struct lyd_node *dnode,
  88                                           char *xpath)
  89 {
  90         const char *vrf;
  91
  92         vrf = yang_dnode_get_string(dnode, "./name");
  93
  94         snprintf(xpath, XPATH_MAXLEN, FRR_ROUTING_KEY_XPATH_VRF, vrf);
  95 }
  96
  97 static void control_plane_protocol_to_vrf(const struct lyd_node *dnode,
  98                                           char *xpath)
  99 {
 100         const char *vrf;
 101
 102         vrf = yang_dnode_get_string(dnode, "./vrf");
 103
 104         snprintf(xpath, XPATH_MAXLEN, FRR_VRF_KEY_XPATH, vrf);
 105 }
 106
 107 void routing_control_plane_protocols_register_vrf_dependency(void)
 108 {
 109         struct nb_dependency_callbacks cbs;
 110
 111         cbs.get_dependant_xpath = vrf_to_control_plane_protocol;
 112         cbs.get_dependency_xpath = control_plane_protocol_to_vrf;
 113
 114         nb_node_set_dependency_cbs(FRR_VRF_XPATH, FRR_ROUTING_XPATH, &cbs);
 115 }