lib/routing_nb_config.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2018        Vmware
   4  *                           Vishal Dhingra
   5  */
   6
   7 #include <zebra.h>
   8
   9 #include "northbound.h"
  10 #include "libfrr.h"
  11 #include "vrf.h"
  12 #include "lib_errors.h"
  13 #include "routing_nb.h"
  14
  15
  16 DEFINE_HOOK(routing_conf_event, (struct nb_cb_create_args *args), (args));
  17
  18 /*
  19  * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol
  20  */
  21
  22 int routing_control_plane_protocols_control_plane_protocol_create(
  23         struct nb_cb_create_args *args)
  24 {
  25         struct vrf *vrf;
  26         const char *vrfname;
  27
  28         switch (args->event) {
  29         case NB_EV_VALIDATE:
  30                 if (hook_call(routing_conf_event, args))
  31                         return NB_ERR_VALIDATION;
  32                 break;
  33         case NB_EV_PREPARE:
  34         case NB_EV_ABORT:
  35                 break;
  36         case NB_EV_APPLY:
  37                 /*
  38                  * If the daemon relies on the VRF pointer stored in this
  39                  * dnode, then it should register the dependency between this
  40                  * module and the VRF module using
  41                  * routing_control_plane_protocols_register_vrf_dependency.
  42                  * If such dependency is not registered, then nothing is
  43                  * stored in the dnode. If the dependency is registered,
  44                  * find the vrf and store the pointer.
  45                  */
  46                 if (nb_node_has_dependency(args->dnode->schema->priv)) {
  47                         vrfname = yang_dnode_get_string(args->dnode, "./vrf");
  48                         vrf = vrf_lookup_by_name(vrfname);
  49                         assert(vrf);
  50                         nb_running_set_entry(args->dnode, vrf);
  51                 }
  52                 break;
  53         };
  54
  55         return NB_OK;
  56 }
  57
  58 int routing_control_plane_protocols_control_plane_protocol_destroy(
  59         struct nb_cb_destroy_args *args)
  60 {
  61         if (args->event != NB_EV_APPLY)
  62                 return NB_OK;
  63
  64         /*
  65          * If dependency on VRF module is registered, then VRF
  66          * pointer was stored and must be cleared.
  67          */
  68         if (nb_node_has_dependency(args->dnode->schema->priv))
  69                 nb_running_unset_entry(args->dnode);
  70
  71         return NB_OK;
  72 }
  73
  74 static void vrf_to_control_plane_protocol(const struct lyd_node *dnode,
  75                                           char *xpath)
  76 {
  77         const char *vrf;
  78
  79         vrf = yang_dnode_get_string(dnode, "./name");
  80
  81         snprintf(xpath, XPATH_MAXLEN, FRR_ROUTING_KEY_XPATH_VRF, vrf);
  82 }
  83
  84 static void control_plane_protocol_to_vrf(const struct lyd_node *dnode,
  85                                           char *xpath)
  86 {
  87         const char *vrf;
  88
  89         vrf = yang_dnode_get_string(dnode, "./vrf");
  90
  91         snprintf(xpath, XPATH_MAXLEN, FRR_VRF_KEY_XPATH, vrf);
  92 }
  93
  94 void routing_control_plane_protocols_register_vrf_dependency(void)
  95 {
  96         struct nb_dependency_callbacks cbs;
  97
  98         cbs.get_dependant_xpath = vrf_to_control_plane_protocol;
  99         cbs.get_dependency_xpath = control_plane_protocol_to_vrf;
 100
 101         nb_node_set_dependency_cbs(FRR_VRF_XPATH, FRR_ROUTING_XPATH, &cbs);
 102 }