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ospf6d: Init/De-init gr helper functionality
Description: Graceful restart helper functionality initialisation and deinit apis. Signed-off-by: Rajesh Girada <rgirada@vmware.com>
This commit is contained in:
rgirada
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91c169f7d7
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155
ospf6d/ospf6_gr_helper.c
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155
ospf6d/ospf6_gr_helper.c
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/*
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* OSPF6 Graceful Retsart helper functions.
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*
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* Copyright (C) 2021-22 Vmware, Inc.
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* Rajesh Kumar Girada
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <zebra.h>
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#include "log.h"
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#include "vty.h"
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#include "command.h"
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#include "prefix.h"
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#include "stream.h"
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#include "zclient.h"
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#include "memory.h"
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#include "table.h"
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#include "lib/bfd.h"
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#include "lib_errors.h"
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#include "jhash.h"
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#include "ospf6_proto.h"
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#include "ospf6_lsa.h"
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#include "ospf6_lsdb.h"
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#include "ospf6_route.h"
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#include "ospf6_message.h"
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#include "ospf6_top.h"
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#include "ospf6_area.h"
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#include "ospf6_interface.h"
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#include "ospf6_neighbor.h"
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#include "ospf6_intra.h"
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#include "ospf6d.h"
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#include "ospf6_gr_helper.h"
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#include "lib/json.h"
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#ifndef VTYSH_EXTRACT_PL
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#include "ospf6d/ospf6_gr_helper_clippy.c"
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#endif
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DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_GR_HELPER, "OSPF6 Graceful restart helper");
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const char *ospf6_exit_reason_desc[] = {
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"Unknown reason", "Helper inprogress", "Topology Change",
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"Grace timer expiry", "Successful graceful restart",
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};
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const char *ospf6_restart_reason_desc[] = {
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"Unknown restart",
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"Software restart",
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"Software reload/upgrade",
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"Switch to redundant control processor",
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};
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const char *ospf6_rejected_reason_desc[] = {
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"Unknown reason",
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"Helper support disabled",
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"Neighbour is not in FULL state",
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"Supports only planned restart but received for unplanned",
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"Topo change due to change in lsa rxmt list",
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"LSA age is more than Grace interval",
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};
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static unsigned int ospf6_enable_rtr_hash_key(const void *data)
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{
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const struct advRtr *rtr = data;
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return jhash_1word(rtr->advRtrAddr, 0);
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}
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static bool ospf6_enable_rtr_hash_cmp(const void *d1, const void *d2)
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{
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const struct advRtr *rtr1 = d1;
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const struct advRtr *rtr2 = d2;
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return (rtr1->advRtrAddr == rtr2->advRtrAddr);
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}
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static void *ospf6_enable_rtr_hash_alloc(void *p)
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{
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struct advRtr *rid;
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rid = XCALLOC(MTYPE_OSPF6_GR_HELPER, sizeof(struct advRtr));
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rid->advRtrAddr = ((struct advRtr *)p)->advRtrAddr;
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return rid;
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}
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static void ospf6_disable_rtr_hash_free(void *rtr)
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{
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XFREE(MTYPE_OSPF6_GR_HELPER, rtr);
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}
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static void ospf6_enable_rtr_hash_destroy(struct ospf6 *ospf6)
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{
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if (ospf6->ospf6_helper_cfg.enable_rtr_list == NULL)
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return;
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hash_clean(ospf6->ospf6_helper_cfg.enable_rtr_list,
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ospf6_disable_rtr_hash_free);
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hash_free(ospf6->ospf6_helper_cfg.enable_rtr_list);
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ospf6->ospf6_helper_cfg.enable_rtr_list = NULL;
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}
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/*
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* Initilise GR helper config datastructer.
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*
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* ospf6
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* ospf6 pointer
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*
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* Returns:
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* Nothing
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*/
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void ospf6_gr_helper_init(struct ospf6 *ospf6)
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{
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ospf6->ospf6_helper_cfg.is_helper_supported = OSPF6_FALSE;
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ospf6->ospf6_helper_cfg.strict_lsa_check = OSPF6_TRUE;
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ospf6->ospf6_helper_cfg.only_planned_restart = OSPF6_FALSE;
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ospf6->ospf6_helper_cfg.supported_grace_time = OSPF6_MAX_GRACE_INTERVAL;
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ospf6->ospf6_helper_cfg.last_exit_reason = OSPF6_GR_HELPER_EXIT_NONE;
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ospf6->ospf6_helper_cfg.active_restarter_cnt = 0;
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ospf6->ospf6_helper_cfg.enable_rtr_list = hash_create(
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ospf6_enable_rtr_hash_key, ospf6_enable_rtr_hash_cmp,
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"Ospf6 enable router hash");
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}
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/*
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* De-Initilise GR helper config datastructer.
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*
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* ospf6
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* ospf6 pointer
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*
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* Returns:
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* Nothing
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*/
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void ospf6_gr_helper_deinit(struct ospf6 *ospf6)
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{
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ospf6_enable_rtr_hash_destroy(ospf6);
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}
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137
ospf6d/ospf6_gr_helper.h
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137
ospf6d/ospf6_gr_helper.h
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@ -0,0 +1,137 @@
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/*
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* OSPF6 Graceful Retsart helper functions.
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*
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* Copyright (C) 2021-22 Vmware, Inc.
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* Rajesh Kumar Girada
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef OSPF6_GR_HELPER_H
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#define OSPF6_GR_HELPER_H
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#define OSPF6_GR_NOT_HELPER 0
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#define OSPF6_GR_ACTIVE_HELPER 1
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#define OSPF6_GR_HELPER_NO_LSACHECK 0
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#define OSPF6_GR_HELPER_LSACHECK 1
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#define OSPF6_MAX_GRACE_INTERVAL 1800
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#define OSPF6_MIN_GRACE_INTERVAL 1
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enum ospf6_helper_exit_reason {
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OSPF6_GR_HELPER_EXIT_NONE = 0,
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OSPF6_GR_HELPER_INPROGRESS,
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OSPF6_GR_HELPER_TOPO_CHG,
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OSPF6_GR_HELPER_GRACE_TIMEOUT,
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OSPF6_GR_HELPER_COMPLETED
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};
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enum ospf6_gr_restart_reason {
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OSPF6_GR_UNKNOWN_RESTART = 0,
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OSPF6_GR_SW_RESTART = 1,
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OSPF6_GR_SW_UPGRADE = 2,
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OSPF6_GR_SWITCH_REDUNDANT_CARD = 3,
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OSPF6_GR_INVALID_REASON_CODE = 4
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};
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enum ospf6_gr_helper_rejected_reason {
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OSPF6_HELPER_REJECTED_NONE,
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OSPF6_HELPER_SUPPORT_DISABLED,
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OSPF6_HELPER_NOT_A_VALID_NEIGHBOUR,
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OSPF6_HELPER_PLANNED_ONLY_RESTART,
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OSPF6_HELPER_TOPO_CHANGE_RTXMT_LIST,
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OSPF6_HELPER_LSA_AGE_MORE
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};
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#ifdef roundup
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#define ROUNDUP(val, gran) roundup(val, gran)
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#else /* roundup */
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#define ROUNDUP(val, gran) (((val)-1 | (gran)-1) + 1)
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#endif /* roundup */
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/*
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* Generic TLV (type, length, value) macros
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*/
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struct tlv_header {
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uint16_t type; /* Type of Value */
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uint16_t length; /* Length of Value portion only, in bytes */
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};
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#define TLV_HDR_SIZE (sizeof(struct tlv_header))
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#define TLV_BODY_SIZE(tlvh) (ROUNDUP(ntohs((tlvh)->length), sizeof(uint32_t)))
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#define TLV_SIZE(tlvh) (TLV_HDR_SIZE + TLV_BODY_SIZE(tlvh))
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#define TLV_HDR_TOP(lsah) \
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(struct tlv_header *)((char *)(lsah) + OSPF6_LSA_HEADER_SIZE)
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#define TLV_HDR_NEXT(tlvh) \
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(struct tlv_header *)((char *)(tlvh) + TLV_SIZE(tlvh))
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/* Ref RFC5187 appendex-A */
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/* Grace period TLV */
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#define GRACE_PERIOD_TYPE 1
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#define GRACE_PERIOD_LENGTH 4
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struct grace_tlv_graceperiod {
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struct tlv_header header;
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uint32_t interval;
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};
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#define GRACE_PERIOD_TLV_SIZE sizeof(struct grace_tlv_graceperiod)
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/* Restart reason TLV */
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#define RESTART_REASON_TYPE 2
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#define RESTART_REASON_LENGTH 1
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struct grace_tlv_restart_reason {
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struct tlv_header header;
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uint8_t reason;
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uint8_t reserved[3];
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};
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#define GRACE_RESTART_REASON_TLV_SIZE sizeof(struct grace_tlv_restart_reason)
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#define OSPF6_GRACE_LSA_MIN_SIZE \
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GRACE_PERIOD_TLV_SIZE + GRACE_RESTART_REASON_TLV_SIZE
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struct advRtr {
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in_addr_t advRtrAddr;
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};
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#define OSPF6_HELPER_ENABLE_RTR_COUNT(ospf) \
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(ospf6->ospf6_helper_cfg.enableRtrList->count)
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/* Check , it is a planned restart */
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#define OSPF6_GR_IS_PLANNED_RESTART(reason) \
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((reason == OSPF6_GR_SW_RESTART) || (reason == OSPF6_GR_SW_UPGRADE))
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/* Check the router is HELPER for current neighbour */
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#define OSPF6_GR_IS_ACTIVE_HELPER(N) \
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((N)->grHelperInfo.grHelper_status == OSPF6_GR_ACTIVE_HELPER)
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/* Check the LSA is GRACE LSA */
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#define IS_GRACE_LSA(lsa) (ntohs(lsa->header->type) == OSPF6_LSTYPE_GRACE_LSA)
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/* Check neighbour is in FULL state */
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#define IS_NBR_STATE_FULL(nbr) (nbr->state == OSPF6_NEIGHBOR_FULL)
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extern const char *ospf6_exit_reason_desc[];
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extern const char *ospf6_restart_reason_desc[];
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extern const char *ospf6_rejected_reason_desc[];
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extern void ospf6_gr_helper_init(struct ospf6 *ospf6);
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extern void ospf6_gr_helper_deinit(struct ospf6 *ospf6);
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#endif /* OSPF6_GR_HELPER_H */
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@ -51,6 +51,7 @@
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#include "ospf6_intra.h"
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#include "ospf6_spf.h"
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#include "ospf6d.h"
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#include "ospf6_gr_helper.h"
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#include "lib/json.h"
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#include "ospf6_nssa.h"
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@ -440,6 +441,7 @@ static struct ospf6 *ospf6_create(const char *name)
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o->oi_write_q = list_new();
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ospf6_gr_helper_init(o);
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QOBJ_REG(o, ospf6);
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/* Make ospf protocol socket. */
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@ -485,6 +487,7 @@ void ospf6_delete(struct ospf6 *o)
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QOBJ_UNREG(o);
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ospf6_gr_helper_deinit(o);
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ospf6_flush_self_originated_lsas_now(o);
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ospf6_disable(o);
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ospf6_del(o);
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@ -2233,7 +2236,6 @@ static int config_write_ospf6(struct vty *vty)
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ospf6_distance_config_write(vty, ospf6);
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ospf6_distribute_config_write(vty, ospf6);
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ospf6_asbr_summary_config_write(vty, ospf6);
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vty_out(vty, "!\n");
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}
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return 0;
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@ -108,6 +108,12 @@ extern struct thread_master *master;
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vrf_name = VRF_DEFAULT_NAME; \
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}
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#define OSPF6_FALSE false
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#define OSPF6_TRUE true
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#define OSPF6_SUCCESS 1
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#define OSPF6_FAILURE 0
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#define OSPF6_INVALID -1
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extern struct zebra_privs_t ospf6d_privs;
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/* Function Prototypes */
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@ -12,6 +12,7 @@ vtysh_scan += \
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ospf6d/ospf6_area.c \
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ospf6d/ospf6_bfd.c \
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ospf6d/ospf6_flood.c \
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ospf6d/ospf6_gr_helper.c \
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ospf6d/ospf6_interface.c \
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ospf6d/ospf6_intra.c \
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ospf6d/ospf6_lsa.c \
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@ -39,6 +40,7 @@ ospf6d_libospf6_a_SOURCES = \
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ospf6d/ospf6_routemap_nb_config.c \
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ospf6d/ospf6_bfd.c \
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ospf6d/ospf6_flood.c \
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ospf6d/ospf6_gr_helper.c \
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ospf6d/ospf6_interface.c \
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ospf6d/ospf6_intra.c \
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ospf6d/ospf6_lsa.c \
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@ -61,6 +63,7 @@ noinst_HEADERS += \
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ospf6d/ospf6_asbr.h \
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ospf6d/ospf6_bfd.h \
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ospf6d/ospf6_flood.h \
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ospf6d/ospf6_gr_helper.h \
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ospf6d/ospf6_interface.h \
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ospf6d/ospf6_intra.h \
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ospf6d/ospf6_lsa.h \
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@ -91,6 +94,7 @@ clippy_scan += \
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ospf6d/ospf6_top.c \
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ospf6d/ospf6_asbr.c \
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ospf6d/ospf6_lsa.c \
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ospf6d/ospf6_gr_helper.c \
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# end
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nodist_ospf6d_ospf6d_SOURCES = \
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