diff options
Diffstat (limited to 'lib/vrf.c')
| -rw-r--r-- | lib/vrf.c | 47 |
1 files changed, 47 insertions, 0 deletions
@@ -214,6 +214,53 @@ struct vrf *vrf_get(vrf_id_t vrf_id, const char *name) return vrf; } +/* Update a VRF. If not found, create one. + * Arg: + * name - The name of the vrf. + * vrf_id - The vrf_id of the vrf. + * Description: This function first finds the vrf using its name. If the vrf is + * found and the vrf-id of the existing vrf does not match the new vrf id, it + * will disable the existing vrf and update it with new vrf-id. If the vrf is + * not found, it will create the vrf with given name and the new vrf id. + */ +struct vrf *vrf_update(vrf_id_t new_vrf_id, const char *name) +{ + struct vrf *vrf = NULL; + + /*Treat VRF add for existing vrf as update + * Update VRF ID and also update in VRF ID table + */ + if (name) + vrf = vrf_lookup_by_name(name); + if (vrf && new_vrf_id != VRF_UNKNOWN && vrf->vrf_id != VRF_UNKNOWN + && vrf->vrf_id != new_vrf_id) { + if (debug_vrf) { + zlog_debug( + "Vrf Update event: %s old id: %u, new id: %u", + name, vrf->vrf_id, new_vrf_id); + } + + /*Disable the vrf to simulate implicit delete + * so that all stale routes are deleted + * This vrf will be enabled down the line + */ + vrf_disable(vrf); + + + RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf); + vrf->vrf_id = new_vrf_id; + RB_INSERT(vrf_id_head, &vrfs_by_id, vrf); + + } else { + + /* + * vrf_get is implied creation if it does not exist + */ + vrf = vrf_get(new_vrf_id, name); + } + return vrf; +} + /* Delete a VRF. This is called when the underlying VRF goes away, a * pre-configured VRF is deleted or when shutting down (vrf_terminate()). */ |