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| author | Robert Shearman <rshearma@brocade.com> | 2017-03-10 20:43:24 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-13 15:29:22 -0700 |
| commit | 5b441ac8784c1e7f3c619f14da4c3f52e87348d5 (patch) | |
| tree | c35721449202da3758d6ed7c6ec4cee19803352a /include | |
| parent | b66239b6824f387361bf18747a7e93760ac3c0fb (diff) | |
| download | linux-5b441ac8784c1e7f3c619f14da4c3f52e87348d5.tar.gz linux-5b441ac8784c1e7f3c619f14da4c3f52e87348d5.tar.bz2 linux-5b441ac8784c1e7f3c619f14da4c3f52e87348d5.zip | |
mpls: allow TTL propagation to IP packets to be configured
Provide the ability to control on a per-route basis whether the TTL
value from an MPLS packet is propagated to an IPv4/IPv6 packet when
the last label is popped as per the theoretical model in RFC 3443
through a new route attribute, RTA_TTL_PROPAGATE which can be 0 to
mean disable propagation and 1 to mean enable propagation.
In order to provide the ability to change the behaviour for packets
arriving with IPv4/IPv6 Explicit Null labels and to provide an easy
way for a user to change the behaviour for all existing routes without
having to reprogram them, a global knob is provided. This is done
through the addition of a new per-namespace sysctl,
"net.mpls.ip_ttl_propagate", which defaults to enabled. If the
per-route attribute is set (either enabled or disabled) then it
overrides the global configuration.
Signed-off-by: Robert Shearman <rshearma@brocade.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/netns/mpls.h | 2 | ||||
| -rw-r--r-- | include/uapi/linux/rtnetlink.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/include/net/netns/mpls.h b/include/net/netns/mpls.h index d29203651c01..08652eedabb2 100644 --- a/include/net/netns/mpls.h +++ b/include/net/netns/mpls.h @@ -9,8 +9,10 @@ struct mpls_route; struct ctl_table_header; struct netns_mpls { + int ip_ttl_propagate; size_t platform_labels; struct mpls_route __rcu * __rcu *platform_label; + struct ctl_table_header *ctl; }; diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h index 75fcf5eff093..3dd72aee4d32 100644 --- a/include/uapi/linux/rtnetlink.h +++ b/include/uapi/linux/rtnetlink.h @@ -319,6 +319,7 @@ enum rtattr_type_t { RTA_EXPIRES, RTA_PAD, RTA_UID, + RTA_TTL_PROPAGATE, __RTA_MAX }; |