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MPLS: Improve label range reconfiguration

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Allow to shorten label range over unused area.
This commit is contained in:
Ondrej Zajicek 2023-09-18 17:47:17 +02:00
parent 8e9e013b0d
commit fcf2258620
1 changed files with 6 additions and 4 deletions
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10
nest/mpls.c
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@ -77,8 +77,7 @@
*
* TODO:
* - label range non-intersection check
* - better range reconfigurations (allow reduce ranges over unused labels)
* - protocols should do route refresh instead of resetart when reconfiguration
* - protocols should do route refresh instead of restart when reconfiguration
* requires changing labels (e.g. different label range)
* - registering static allocations
* - checking range in static allocations
@ -349,9 +348,12 @@ mpls_find_range_(list *l, const char *name)
}
static int
mpls_reconfigure_range(struct mpls_domain *m UNUSED, struct mpls_range *r, struct mpls_range_config *cf)
mpls_reconfigure_range(struct mpls_domain *m, struct mpls_range *r, struct mpls_range_config *cf)
{
if ((cf->start > r->lo) || (cf->start + cf->length < r->hi))
uint last = lmap_last_one_in_range(&m->labels, r->lo, r->hi);
if (last == r->hi) last = 0;
if ((cf->start > r->lo) || (cf->start + cf->length <= last))
return 0;
cf->range = r;