On 3/10/17 1:43 PM, Robert Shearman wrote: > Allow TTL propagation from IP packets to MPLS packets to be > configured. Add a new optional LWT attribute, MPLS_IPTUNNEL_TTL, which > allows the TTL to be set in the resulting MPLS packet, with the value > of 0 having the semantics of enabling propagation of the TTL from the > IP header (i.e. non-zero values disable propagation). > > Also allow the configuration to be overridden globally by reusing the > same sysctl to control whether the TTL is propagated from IP packets > into the MPLS header. If the per-LWT attribute is set then it > overrides the global configuration. If the TTL isn't propagated then a > default TTL value is used which can be configured via a new sysctl, > "net.mpls.default_ttl". This is kept separate from the configuration > of whether IP TTL propagation is enabled as it can be used in the > future when non-IP payloads are supported (i.e. where there is no > payload TTL that can be propagated). > > Signed-off-by: Robert Shearman <rshea...@brocade.com> > --- > Documentation/networking/mpls-sysctl.txt | 8 ++++ > include/net/mpls_iptunnel.h | 2 + > include/net/netns/mpls.h | 1 + > include/uapi/linux/mpls_iptunnel.h | 2 + > net/mpls/af_mpls.c | 11 +++++ > net/mpls/mpls_iptunnel.c | 73 > ++++++++++++++++++++++++++------ > 6 files changed, 84 insertions(+), 13 deletions(-)
Acked-by: David Ahern <d...@cumulusnetworks.com> Tested-by: David Ahern <d...@cumulusnetworks.com>
