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ospfd: ospf GR helper data structure definitions.
Description: Graceful restart helper support specific data structure changes. Signed-off-by: Rajesh Girada <rgirada@vmware.com>
This commit is contained in:
rgirada
parent
cc1a92d806
commit
f96f271366
@ -62,6 +62,9 @@
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#define OSPF_DEBUG_DEFAULTINFO 0x20
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#define OSPF_DEBUG_LDP_SYNC 0x40
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#define OSPF_DEBUG_GR_HELPER 0x01
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#define OSPF_DEBUG_GR 0x03
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/* Macro for setting debug option. */
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#define CONF_DEBUG_PACKET_ON(a, b) conf_debug_ospf_packet[a] |= (b)
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#define CONF_DEBUG_PACKET_OFF(a, b) conf_debug_ospf_packet[a] &= ~(b)
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@ -109,6 +112,7 @@
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#define IS_DEBUG_OSPF_DEFAULT_INFO IS_DEBUG_OSPF(defaultinfo, DEFAULTINFO)
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#define IS_DEBUG_OSPF_LDP_SYNC IS_DEBUG_OSPF(ldp_sync, LDP_SYNC)
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#define IS_DEBUG_OSPF_GR_HELPER IS_DEBUG_OSPF(gr, GR_HELPER)
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#define IS_CONF_DEBUG_OSPF_PACKET(a, b) \
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(conf_debug_ospf_packet[a] & OSPF_DEBUG_##b)
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@ -130,6 +134,7 @@ extern unsigned long term_debug_ospf_ext;
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extern unsigned long term_debug_ospf_sr;
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extern unsigned long term_debug_ospf_defaultinfo;
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extern unsigned long term_debug_ospf_ldp_sync;
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extern unsigned long term_debug_ospf_gr;
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/* Message Strings. */
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extern char *ospf_lsa_type_str[];
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154
ospfd/ospf_gr_helper.h
Normal file
154
ospfd/ospf_gr_helper.h
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@ -0,0 +1,154 @@
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/*
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* OSPF Graceful Restart helper functions.
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*
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* Copyright (C) 2020-21 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 _ZEBRA_OSPF_HELPER_H
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#define _ZEBRA_OSPF_HELPER_H
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#define OSPF_GR_NOT_HELPER 0
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#define OSPF_GR_ACTIVE_HELPER 1
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#define OSPF_GR_HELPER_NO_LSACHECK 0
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#define OSPF_GR_HELPER_LSACHECK 1
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#define OSPF_MAX_GRACE_INTERVAL 1800
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#define OSPF_MIN_GRACE_INTERVAL 1
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enum ospf_helper_exit_reason {
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OSPF_GR_HELPER_EXIT_NONE = 0,
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OSPF_GR_HELPER_INPROGRESS,
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OSPF_GR_HELPER_TOPO_CHG,
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OSPF_GR_HELPER_GRACE_TIMEOUT,
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OSPF_GR_HELPER_COMPLETED
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};
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enum ospf_gr_restart_reason {
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OSPF_GR_UNKNOWN_RESTART = 0,
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OSPF_GR_SW_RESTART = 1,
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OSPF_GR_SW_UPGRADE = 2,
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OSPF_GR_SWITCH_REDUNDANT_CARD = 3,
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OSPF_GR_INVALID_REASON_CODE = 4
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};
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enum ospf_gr_helper_rejected_reason {
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OSPF_HELPER_REJECTED_NONE,
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OSPF_HELPER_SUPPORT_DISABLED,
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OSPF_HELPER_NOT_A_VALID_NEIGHBOUR,
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OSPF_HELPER_PLANNED_ONLY_RESTART,
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OSPF_HELPER_TOPO_CHANGE_RTXMT_LIST,
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OSPF_HELPER_LSA_AGE_MORE
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};
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/* Ref RFC3623 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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/* 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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/* Restarter ip address TLV */
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#define RESTARTER_IP_ADDR_TYPE 3
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#define RESTARTER_IP_ADDR_LEN 4
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struct grace_tlv_restart_addr {
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struct tlv_header header;
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struct in_addr addr;
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};
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struct ospf_helper_info {
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/* Grace interval received from
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* Restarting Router.
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*/
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uint32_t recvd_grace_period;
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/* Grace interval used for grace
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* gracetimer.
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*/
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uint32_t actual_grace_period;
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/* Grace timer,This Router acts as
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* helper until this timer until
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* this timer expires*/
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struct thread *t_grace_timer;
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/* Helper status */
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uint32_t gr_helper_status;
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/* Helper exit reason*/
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enum ospf_helper_exit_reason helper_exit_reason;
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/* Planned/Unplanned restart*/
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enum ospf_gr_restart_reason gr_restart_reason;
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/* Helper rejected reason */
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enum ospf_gr_helper_rejected_reason rejected_reason;
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};
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struct advRtr {
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struct in_addr advRtrAddr;
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};
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#define OSPF_HELPER_ENABLE_RTR_COUNT(ospf) (ospf->enable_rtr_list->count)
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/* Check for planned restart */
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#define OSPF_GR_IS_PLANNED_RESTART(reason) \
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((reason == OSPF_GR_SW_RESTART) || (reason == OSPF_GR_SW_UPGRADE))
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/* Check the router is HELPER for current neighbour */
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#define OSPF_GR_IS_ACTIVE_HELPER(N) \
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((N)->gr_helper_info.gr_helper_status == OSPF_GR_ACTIVE_HELPER)
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/* Check the LSA is GRACE LSA */
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#define IS_GRACE_LSA(lsa) \
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((lsa->data->type == OSPF_OPAQUE_LINK_LSA) \
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&& (GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) \
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== OPAQUE_TYPE_GRACE_LSA))
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/* Check neighbour is in FULL state */
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#define IS_NBR_STATE_FULL(nbr) (nsm_should_adj(nbr) && (nbr->state == NSM_Full))
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/* Check neighbour is DR_OTHER and state is 2_WAY */
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#define IS_NBR_STATE_2_WAY_WITH_DROTHER(nbr) \
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((ospf_get_nbr_ism_role(nbr) == ISM_DROther) \
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&& (nbr->state == NSM_TwoWay))
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#define OSPF_GR_FALSE false
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#define OSPF_GR_TRUE true
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#define OSPF_GR_SUCCESS 1
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#define OSPF_GR_FAILURE 0
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#define OSPF_GR_INVALID -1
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#endif /* _ZEBRA_OSPF_HELPER_H */
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@ -22,6 +22,7 @@
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#ifndef _ZEBRA_OSPF_NEIGHBOR_H
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#define _ZEBRA_OSPF_NEIGHBOR_H
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#include <ospfd/ospf_gr_helper.h>
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#include <ospfd/ospf_packet.h>
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/* Neighbor Data Structure */
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@ -88,6 +89,9 @@ struct ospf_neighbor {
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/* BFD information */
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void *bfd_info;
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/* ospf graceful restart HELPER info */
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struct ospf_helper_info gr_helper_info;
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};
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/* Macros. */
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@ -113,5 +117,4 @@ extern struct ospf_neighbor *ospf_nbr_lookup_by_addr(struct route_table *,
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extern struct ospf_neighbor *ospf_nbr_lookup_by_routerid(struct route_table *,
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struct in_addr *);
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extern void ospf_renegotiate_optional_capabilities(struct ospf *top);
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#endif /* _ZEBRA_OSPF_NEIGHBOR_H */
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@ -319,7 +319,41 @@ struct ospf {
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/* Redistributed external information. */
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struct list *external[ZEBRA_ROUTE_MAX + 1];
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#define EXTERNAL_INFO(E) (E->external_info)
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#define EXTERNAL_INFO(E) (E->external_info)
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/* Gracefull restart Helper supported configs*/
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/* Supported grace interval*/
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uint32_t supported_grace_time;
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/* Helper support
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* Supported : True
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* Not Supported : False.
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*/
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bool is_helper_supported;
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/* Support for strict LSA check.
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* if it is set,Helper aborted
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* upon a TOPO change.
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*/
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bool strict_lsa_check;
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/* Support as HELPER only for
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* planned restarts.
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*/
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bool only_planned_restart;
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/* This list contains the advertisement
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* routerids which are not support for HELPERs.
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*/
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struct hash *enable_rtr_list;
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/* HELPER for number of active
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* RESTARTERs.
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*/
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uint16_t active_restarter_cnt;
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/* last HELPER exit reason */
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uint32_t last_exit_reason;
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/* MPLS LDP-IGP Sync */
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struct ldp_sync_info_cmd ldp_sync_cmd;
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