147 lines
4.4 KiB
C
147 lines
4.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/* PIM support for VxLAN BUM flooding
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*
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* Copyright (C) 2019 Cumulus Networks, Inc.
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*/
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#ifndef PIM_VXLAN_H
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#define PIM_VXLAN_H
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#include "pim_instance.h"
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/* global timer used for miscellaneous staggered processing */
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#define PIM_VXLAN_WORK_TIME 1
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/* number of SG entries processed at one shot */
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#define PIM_VXLAN_WORK_MAX 500
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/* frequency of periodic NULL registers */
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#define PIM_VXLAN_NULL_REG_INTERVAL 60 /* seconds */
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#define vxlan_mlag (vxlan_info.mlag)
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enum pim_vxlan_sg_flags {
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PIM_VXLAN_SGF_NONE = 0,
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PIM_VXLAN_SGF_DEL_IN_PROG = (1 << 0),
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PIM_VXLAN_SGF_OIF_INSTALLED = (1 << 1)
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};
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struct pim_vxlan_sg {
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struct pim_instance *pim;
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/* key */
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pim_sgaddr sg;
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char sg_str[PIM_SG_LEN];
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enum pim_vxlan_sg_flags flags;
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struct pim_upstream *up;
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struct listnode *work_node; /* to pim_vxlan.work_list */
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/* termination info (only applicable to termination XG mroutes)
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* term_if - termination device ipmr-lo is added to the OIL
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* as local/IGMP membership to allow termination of vxlan traffic
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*/
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struct interface *term_oif;
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/* origination info
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* iif - lo/vrf or peerlink (on MLAG setups)
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* peerlink_oif - added to the OIL to send encapsulated BUM traffic to
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* the MLAG peer switch
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*/
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struct interface *iif;
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/* on a MLAG setup the peerlink is added as a static OIF */
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struct interface *orig_oif;
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struct event *null_register;
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uint32_t null_register_sent;
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};
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enum pim_vxlan_mlag_flags {
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PIM_VXLAN_MLAGF_NONE = 0,
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PIM_VXLAN_MLAGF_ENABLED = (1 << 0),
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PIM_VXLAN_MLAGF_DO_REG = (1 << 1)
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};
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struct pim_vxlan_mlag {
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enum pim_vxlan_mlag_flags flags;
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/* XXX - remove this variable from here */
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int role;
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bool peer_state;
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/* routed interface setup on top of MLAG peerlink */
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struct interface *peerlink_rif;
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struct in_addr reg_addr;
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};
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enum pim_vxlan_flags {
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PIM_VXLANF_NONE = 0,
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PIM_VXLANF_WORK_INITED = (1 << 0)
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};
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struct pim_vxlan {
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enum pim_vxlan_flags flags;
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struct event *work_timer;
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struct list *work_list;
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struct listnode *next_work;
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int max_work_cnt;
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struct pim_vxlan_mlag mlag;
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};
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/* zebra adds-
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* 1. one (S, G) entry where S=local-VTEP-IP and G==BUM-mcast-grp for
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* each BUM MDT. This is the origination entry.
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* 2. and one (*, G) entry each MDT. This is the termination place holder.
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*
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* Note: This doesn't mean that only (*, G) mroutes are used for tunnel
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* termination. (S, G) mroutes with ipmr-lo in the OIL can also be
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* used for tunnel termiation if SPT switchover happens; however such
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* SG entries are created by traffic and will NOT be a part of the vxlan SG
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* database.
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*/
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static inline bool pim_vxlan_is_orig_mroute(struct pim_vxlan_sg *vxlan_sg)
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{
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return !pim_addr_is_any(vxlan_sg->sg.src);
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}
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static inline bool pim_vxlan_is_local_sip(struct pim_upstream *up)
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{
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return !pim_addr_is_any(up->sg.src) &&
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up->rpf.source_nexthop.interface &&
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if_is_loopback(up->rpf.source_nexthop.interface);
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}
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static inline bool pim_vxlan_is_term_dev_cfg(struct pim_instance *pim,
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struct interface *ifp)
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{
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return pim->vxlan.term_if_cfg == ifp;
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}
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extern struct pim_vxlan *pim_vxlan_p;
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extern struct pim_vxlan_sg *pim_vxlan_sg_find(struct pim_instance *pim,
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pim_sgaddr *sg);
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extern struct pim_vxlan_sg *pim_vxlan_sg_add(struct pim_instance *pim,
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pim_sgaddr *sg);
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extern void pim_vxlan_sg_del(struct pim_instance *pim, pim_sgaddr *sg);
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extern void pim_vxlan_update_sg_reg_state(struct pim_instance *pim,
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struct pim_upstream *up, bool reg_join);
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extern struct pim_interface *pim_vxlan_get_term_ifp(struct pim_instance *pim);
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extern void pim_vxlan_add_vif(struct interface *ifp);
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extern void pim_vxlan_del_vif(struct interface *ifp);
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extern void pim_vxlan_add_term_dev(struct pim_instance *pim,
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struct interface *ifp);
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extern void pim_vxlan_del_term_dev(struct pim_instance *pim);
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extern bool pim_vxlan_get_register_src(struct pim_instance *pim,
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struct pim_upstream *up, struct in_addr *src_p);
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extern void pim_vxlan_mlag_update(bool enable, bool peer_state, uint32_t role,
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struct interface *peerlink_rif,
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struct in_addr *reg_addr);
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extern bool pim_vxlan_do_mlag_reg(void);
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extern void pim_vxlan_inherit_mlag_flags(struct pim_instance *pim,
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struct pim_upstream *up, bool inherit);
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extern void pim_vxlan_rp_info_is_alive(struct pim_instance *pim,
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struct pim_rpf *rpg_changed);
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/* Shutdown of PIM stop the thread */
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extern void pim_vxlan_terminate(void);
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#endif /* PIM_VXLAN_H */
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