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netdev-vport: Deprecate LISP tunnel port type.

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Tunnel support is in upstream Linux kernel since 2013.  However,
despite the FAQ saying so, I'm not aware of actual attempts to bring
support for LISP tunnels upstream.  The only available implementation
is in OOT kernel module shipped with OVS 2.17.  It is deprecated and
will reach EoL in Feb 2025.

Mark the tunnel port type as deprecated, so we can fully remove the
support once the only available implementation reaches end of life
together with OVS 2.17.

Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Ilya Maximets
2024-12-04 21:45:11 +01:00
parent 77ac0b28c8
commit 8d7ac031c0
7 changed files with 22 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/faq/releases.rst
View File

@@ -141,7 +141,7 @@ Q: Are all features available with all datapaths?
Conntrack NAT 4.6 2.6 2.8 YES
Conntrack NAT6 4.6 2.6 2.8 3.0
Conntrack Helper Persist. YES YES 3.3 NO
Tunnel - LISP NO 2.11 NO NO
Tunnel - LISP (deprecated) NO 2.11 NO NO
Tunnel - STT NO 2.4 NO YES
Tunnel - GRE 3.11 1.0 2.4 YES
Tunnel - VXLAN 3.12 1.10 2.4 YES
@@ -270,16 +270,10 @@ Q: I get an error like this when I configure Open vSwitch:
Q: What features are not available in the Open vSwitch kernel datapath that
ships as part of the upstream Linux kernel?
A: The kernel module in upstream Linux does not include support for LISP.
Work is in progress to add support for LISP to the upstream Linux version
of the Open vSwitch kernel module. For now, if you need this feature, use
the kernel module from the Open vSwitch distribution instead of the
upstream Linux kernel module.
Certain features require kernel support to function or to have reasonable
performance. If the ovs-vswitchd log file indicates that a feature is not
supported, consider upgrading to a newer upstream Linux release or using
the kernel module paired with the userspace distribution.
A: Certain features require kernel support to function or to have
reasonable performance. If the ovs-vswitchd log file indicates that a
feature is not supported, consider upgrading to a newer upstream Linux
release or using the kernel module paired with the userspace distribution.
Please note that as of Open vSwitch 3.0 the kernel module is no longer
part of the Open vSwitch distribution.

4
Documentation/howto/lisp.rst
View File

@@ -25,6 +25,10 @@
Using LISP tunneling
====================
.. warning::
LISP tunnel port type is deprecated and will be removed in OVS 3.6.
LISP is a layer 3 tunneling mechanism, meaning that encapsulated packets do not
carry Ethernet headers, and ARP requests shouldn't be sent over the tunnel.
Because of this, there are some additional steps required for setting up LISP

3
NEWS
View File

@@ -25,6 +25,9 @@ Post-v3.4.0
formats.
- DPDK:
* OVS validated with DPDK 23.11.2.
- Tunnels:
* LISP tunnel port type is deprecated and will be removed in the next
release.
v3.4.0 - 15 Aug 2024

2
include/linux/openvswitch.h
View File

@@ -247,7 +247,7 @@ enum ovs_vport_type {
OVS_VPORT_TYPE_GRE, /* GRE tunnel. */
OVS_VPORT_TYPE_VXLAN, /* VXLAN tunnel. */
OVS_VPORT_TYPE_GENEVE, /* Geneve tunnel. */
OVS_VPORT_TYPE_LISP = 105, /* LISP tunnel */
OVS_VPORT_TYPE_LISP = 105, /* LISP tunnel (deprecated). */
OVS_VPORT_TYPE_STT = 106, /* STT tunnel */
OVS_VPORT_TYPE_ERSPAN = 107, /* ERSPAN tunnel. */
OVS_VPORT_TYPE_IP6ERSPAN = 108, /* ERSPAN tunnel. */

1
lib/netdev-vport.c
View File

@@ -226,6 +226,7 @@ netdev_vport_construct(struct netdev *netdev_)
update_vxlan_global_cfg(netdev_, NULL, tnl_cfg);
} else if (!strcmp(type, "lisp")) {
tnl_cfg->dst_port = port ? htons(port) : htons(LISP_DST_PORT);
VLOG_WARN("%s: 'lisp' port type is deprecated.", name);
} else if (!strcmp(type, "stt")) {
tnl_cfg->dst_port = port ? htons(port) : htons(STT_DST_PORT);
} else if (!strcmp(type, "gtpu")) {

2
tests/tunnel.at
View File

@@ -573,7 +573,7 @@ AT_CHECK([ovs-appctl dpif/show | tail -n +3], [0], [dnl
p1 1/4341: (lisp: remote_ip=1.1.1.1)
])
OVS_VSWITCHD_STOP
OVS_VSWITCHD_STOP(["/'lisp' port type is deprecated/d"])
AT_CLEANUP
AT_SETUP([tunnel - ERSPAN])

7
vswitchd/vswitch.xml
View File

@@ -2825,6 +2825,9 @@
<dt><code>lisp</code></dt>
<dd>
<p>
This port type is deprecated.
</p>
<p>
A layer 3 tunnel over the experimental, UDP-based Locator/ID
Separation Protocol (RFC 6830).
@@ -3095,6 +3098,10 @@
<column name="options" key="packet_type"
type='{"type": "string", "enum": ["set",
["legacy_l3", "ptap"]]}'>
<p>
LISP tunnel type is deprecated.
</p>
<p>
A LISP tunnel sends and receives only IPv4 and IPv6 packets. This
option controls what how the tunnel represents the packets that it