diff options
Diffstat (limited to 'zebra/zebra_nhg.h')
| -rw-r--r-- | zebra/zebra_nhg.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/zebra/zebra_nhg.h b/zebra/zebra_nhg.h index 0863d90a7e..6d2ab248f9 100644 --- a/zebra/zebra_nhg.h +++ b/zebra/zebra_nhg.h @@ -79,16 +79,34 @@ struct nhg_hash_entry { uint32_t flags; - /* Dependency tree for other entries. + /* Dependency trees for other entries. * For instance a group with two * nexthops will have two dependencies * pointing to those nhg_hash_entries. * * Using a rb tree here to make lookups * faster with ID's. + * + * nhg_depends the RB tree of entries that this + * group contains. + * + * nhg_dependents the RB tree of entries that + * this group is being used by + * + * NHG id 3 with nexthops id 1/2 + * nhg(3)->nhg_depends has 1 and 2 in the tree + * nhg(3)->nhg_dependents is empty + * + * nhg(1)->nhg_depends is empty + * nhg(1)->nhg_dependents is 3 in the tree + * + * nhg(2)->nhg_depends is empty + * nhg(3)->nhg_dependents is 3 in the tree */ struct nhg_connected_tree_head nhg_depends, nhg_dependents; + struct thread *timer; + /* * Is this nexthop group valid, ie all nexthops are fully resolved. * What is fully resolved? It's a nexthop that is either self contained @@ -130,6 +148,15 @@ struct nhg_hash_entry { #define NEXTHOP_GROUP_PROTO_RELEASED (1 << 5) /* + * When deleting a NHG notice that it is still installed + * and if it is, slightly delay the actual removal to + * the future. So that upper level protocols might + * be able to take advantage of some NHG's that + * are there + */ +#define NEXTHOP_GROUP_KEEP_AROUND (1 << 6) + +/* * Track FPM installation status.. */ #define NEXTHOP_GROUP_FPM (1 << 6) |