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zebra: Add nhg refcnt connected helper functions

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Add some helper functions for ref incrementing and
decrementing the depends of a nexthop group hash entry.

This just abstracts the RB tree manipulation a bit more.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2019-07-17 13:15:51 -04:00
parent 44d809a90b
commit 32e29e7910
1 changed files with 23 additions and 17 deletions
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40
zebra/zebra_nhg.c
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@ -135,6 +135,25 @@ void nhg_connected_head_add(struct nhg_connected_head *head,
RB_INSERT(nhg_connected_head, head, new);
}
static void nhg_connected_head_decrement_ref(struct nhg_connected_head *head)
{
struct nhg_connected *rb_node_dep = NULL;
struct nhg_connected *tmp = NULL;
RB_FOREACH_SAFE (rb_node_dep, nhg_connected_head, head, tmp) {
zebra_nhg_decrement_ref(rb_node_dep->nhe);
}
}
static void nhg_connected_head_increment_ref(struct nhg_connected_head *head)
{
struct nhg_connected *rb_node_dep = NULL;
RB_FOREACH (rb_node_dep, nhg_connected_head, head) {
zebra_nhg_increment_ref(rb_node_dep->nhe);
}
}
struct nhg_hash_entry *zebra_nhg_resolve(struct nhg_hash_entry *nhe)
{
if (CHECK_FLAG(nhe->flags, NEXTHOP_GROUP_RECURSIVE)
@ -768,15 +787,8 @@ void zebra_nhg_decrement_ref(struct nhg_hash_entry *nhe)
{
nhe->refcnt--;
if (!zebra_nhg_depends_is_empty(nhe)) {
struct nhg_connected *rb_node_dep = NULL;
struct nhg_connected *tmp = NULL;
RB_FOREACH_SAFE (rb_node_dep, nhg_connected_head,
&nhe->nhg_depends, tmp) {
zebra_nhg_decrement_ref(rb_node_dep->nhe);
}
}
if (!zebra_nhg_depends_is_empty(nhe))
nhg_connected_head_decrement_ref(&nhe->nhg_depends);
if (!nhe->is_kernel_nh && nhe->refcnt <= 0)
zebra_nhg_uninstall_kernel(nhe);
@ -786,14 +798,8 @@ void zebra_nhg_increment_ref(struct nhg_hash_entry *nhe)
{
nhe->refcnt++;
if (!zebra_nhg_depends_is_empty(nhe)) {
struct nhg_connected *rb_node_dep = NULL;
RB_FOREACH (rb_node_dep, nhg_connected_head,
&nhe->nhg_depends) {
zebra_nhg_increment_ref(rb_node_dep->nhe);
}
}
if (!zebra_nhg_depends_is_empty(nhe))
nhg_connected_head_increment_ref(&nhe->nhg_depends);
}
void zebra_nhg_set_invalid(struct nhg_hash_entry *nhe)