tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh
Extension
.sh
Size
3529 bytes
Lines
95
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0

# This is the standard topology for testing mirroring to gretap and ip6gretap
# netdevices. The tests that use it tweak it in one way or another--importantly,
# $swp3 and $h3 need to have addresses set up.
#
#   +---------------------+                             +---------------------+
#   | H1                  |                             |                  H2 |
#   |     + $h1           |                             |           $h2 +     |
#   |     | 192.0.2.1/28  |                             |  192.0.2.2/28 |     |
#   +-----|---------------+                             +---------------|-----+
#         |                                                             |
#   +-----|-------------------------------------------------------------|-----+
#   | SW  o--> mirror                                                   |     |
#   | +---|-------------------------------------------------------------|---+ |
#   | |   + $swp1                    BR                           $swp2 +   | |
#   | +---------------------------------------------------------------------+ |
#   |                                                                         |
#   |     + $swp3               + gt6 (ip6gretap)      + gt4 (gretap)         |
#   |     |                     : loc=2001:db8:2::1    : loc=192.0.2.129      |
#   |     |                     : rem=2001:db8:2::2    : rem=192.0.2.130      |
#   |     |                     : ttl=100              : ttl=100              |
#   |     |                     : tos=inherit          : tos=inherit          |
#   |     |                     :                      :                      |
#   +-----|---------------------:----------------------:----------------------+
#         |                     :                      :
#   +-----|---------------------:----------------------:----------------------+
#   | H3  + $h3                 + h3-gt6 (ip6gretap)   + h3-gt4 (gretap)      |
#   |                             loc=2001:db8:2::2      loc=192.0.2.130      |
#   |                             rem=2001:db8:2::1      rem=192.0.2.129      |
#   |                             ttl=100                ttl=100              |
#   |                             tos=inherit            tos=inherit          |
#   |                                                                         |
#   +-------------------------------------------------------------------------+

source "$net_forwarding_dir/mirror_topo_lib.sh"

mirror_gre_topo_h3_create()
{
	mirror_topo_h3_create

	tunnel_create h3-gt4 gretap 192.0.2.130 192.0.2.129
	ip link set h3-gt4 vrf v$h3
	matchall_sink_create h3-gt4

	tunnel_create h3-gt6 ip6gretap 2001:db8:2::2 2001:db8:2::1
	ip link set h3-gt6 vrf v$h3
	matchall_sink_create h3-gt6
}

mirror_gre_topo_h3_destroy()
{
	tunnel_destroy h3-gt6
	tunnel_destroy h3-gt4

	mirror_topo_h3_destroy
}

mirror_gre_topo_switch_create()
{
	mirror_topo_switch_create

	tunnel_create gt4 gretap 192.0.2.129 192.0.2.130 \
		      ttl 100 tos inherit

	tunnel_create gt6 ip6gretap 2001:db8:2::1 2001:db8:2::2 \
		      ttl 100 tos inherit allow-localremote
}

mirror_gre_topo_switch_destroy()

Annotation

Implementation Notes