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Merge pull request #13278 from FRRouting/mergify/bp/stable/8.5/pr-13269
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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 }