diff options
Diffstat (limited to 'bgpd/bgp_mplsvpn.c')
| -rw-r--r-- | bgpd/bgp_mplsvpn.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/bgpd/bgp_mplsvpn.c b/bgpd/bgp_mplsvpn.c index 85cc8f3596..b96c287f86 100644 --- a/bgpd/bgp_mplsvpn.c +++ b/bgpd/bgp_mplsvpn.c @@ -4079,6 +4079,35 @@ void bgp_vpn_leak_export(struct bgp *from_bgp) } } +/* It releases the label from labelpool which + * was previously assigned and unsets the flag based on reset arg + * This also used in vty to release the label and to change the allocation mode as well + */ +void bgp_vpn_release_label(struct bgp *bgp, afi_t afi, bool reset) +{ + if (!CHECK_FLAG(bgp->vpn_policy[afi].flags, BGP_VPN_POLICY_TOVPN_LABEL_AUTO)) + return; + /* + * label has previously been automatically + * assigned by labelpool: release it + * + * NB if tovpn_label == MPLS_LABEL_NONE it + * means the automatic assignment is in flight + * and therefore the labelpool callback must + * detect that the auto label is not needed. + */ + if (bgp->vpn_policy[afi].tovpn_label == MPLS_LABEL_NONE) + return; + if (CHECK_FLAG(bgp->vpn_policy[afi].flags, BGP_VPN_POLICY_TOVPN_LABEL_PER_NEXTHOP)) + return; + + bgp_lp_release(LP_TYPE_VRF, &bgp->vpn_policy[afi], bgp->vpn_policy[afi].tovpn_label); + bgp->vpn_policy[afi].tovpn_label = MPLS_LABEL_NONE; + + if (reset) + UNSET_FLAG(bgp->vpn_policy[afi].flags, BGP_VPN_POLICY_TOVPN_LABEL_AUTO); +} + /* The nexthops values are compared to * find in the tree the appropriate cache entry */ |