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| author | Philippe Guibert <philippe.guibert@6wind.com> | 2023-05-11 13:56:16 +0200 |
|---|---|---|
| committer | Philippe Guibert <philippe.guibert@6wind.com> | 2023-06-16 10:54:58 +0200 |
| commit | 1069425868d108bd6e582f6b67a78a1d9ac4bd85 (patch) | |
| tree | aee07885b7faa1c1ed29666d4cc4fa5babfd2754 /bgpd/bgp_mplsvpn.h | |
| parent | 28d5c6e531b685725ee4c6fec90813041bfb2bc3 (diff) | |
bgpd: allocate label bound to received mpls vpn routes
Current implementation does not offer a new label to bind
to a received VPN route entry to redistribute with that new
label.
This commit allocates a label for VPN entries that have
a valid label, and a reachable next-hop interface that is
configured as follows:
> interface eth0
> mpls bgp l3vpn-multi-domain-switching
> exit
An mplsvpn next-hop label binding entry is created in an mpls
vpn nexthop label bind hash table of the current BGP instance.
That mpls vpn next-hop label entry is indexed by the (next-hop,
orig_label) values provided by the incoming updates, and shared
with other updates having the same (next-hop, orig_label) values.
A new 'LP_TYPE_BGP_L3VPN_BIND' label value is picked up from the
zebra mpls label pool, and assigned to the new_label attribute.
The 'bgp_path_info' appends a 'bgp_mplsvpn_nh_label_bind' structure
to the 'mplsvpn' union structure. Both structures in the union are not
used at the same, as the paths are either VRF updates to export, or MPLS
VPN updates. Using an union gives a 24 bytes memory gain compared to if
the structures had not been in an union (24 bytes compared to 48 bytes).
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Diffstat (limited to 'bgpd/bgp_mplsvpn.h')
| -rw-r--r-- | bgpd/bgp_mplsvpn.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/bgpd/bgp_mplsvpn.h b/bgpd/bgp_mplsvpn.h index 5fe64ade48..132e96f0f2 100644 --- a/bgpd/bgp_mplsvpn.h +++ b/bgpd/bgp_mplsvpn.h @@ -325,9 +325,13 @@ extern void vpn_handle_router_id_update(struct bgp *bgp, bool withdraw, extern void bgp_vpn_leak_unimport(struct bgp *from_bgp); extern void bgp_vpn_leak_export(struct bgp *from_bgp); +extern bool bgp_mplsvpn_path_uses_valid_mpls_label(struct bgp_path_info *pi); extern int bgp_mplsvpn_nh_label_bind_cmp(const struct bgp_mplsvpn_nh_label_bind_cache *a, const struct bgp_mplsvpn_nh_label_bind_cache *b); +extern void bgp_mplsvpn_path_nh_label_bind_unlink(struct bgp_path_info *pi); +extern void bgp_mplsvpn_nh_label_bind_register_local_label( + struct bgp *bgp, struct bgp_dest *dest, struct bgp_path_info *pi); /* used to bind a local label to the (label, nexthop) values * from an incoming BGP mplsvpn update @@ -365,6 +369,8 @@ struct bgp_mplsvpn_nh_label_bind_cache { LIST_HEAD(mplsvpn_nh_label_bind_path_lists, bgp_path_info) paths; time_t last_update; + + bool allocation_in_progress; }; DECLARE_RBTREE_UNIQ(bgp_mplsvpn_nh_label_bind_cache, |