kernel.git/tools/testing/selftests/net/ioam6.sh, branch master

ipv6: preserve insertion order for same-scope addresses

2026-01-07T00:41:35Z

IPv6 addresses with the same scope are returned in reverse insertion order, unlike IPv4. For example, when adding a -> b -> c, the list is reported as c -> b -> a, while IPv4 preserves the original order. This behavior causes: a. When using `ip -6 a save` and `ip -6 a restore`, addresses are restored in the opposite order from which they were saved. See example below showing addresses added as 1::1, 1::2, 1::3 but displayed and saved in reverse order. # ip -6 a a 1::1 dev x # ip -6 a a 1::2 dev x # ip -6 a a 1::3 dev x # ip -6 a s dev x 2: x: mtu 1500 qdisc noop state DOWN group default qlen 1000 inet6 1::3/128 scope global tentative valid_lft forever preferred_lft forever inet6 1::2/128 scope global tentative valid_lft forever preferred_lft forever inet6 1::1/128 scope global tentative valid_lft forever preferred_lft forever # ip -6 a save > dump # ip -6 a d 1::1 dev x # ip -6 a d 1::2 dev x # ip -6 a d 1::3 dev x # ip a d ::1 dev lo # ip a restore < dump # ip -6 a s dev x 2: x: mtu 1500 qdisc noop state DOWN group default qlen 1000 inet6 1::1/128 scope global tentative valid_lft forever preferred_lft forever inet6 1::2/128 scope global tentative valid_lft forever preferred_lft forever inet6 1::3/128 scope global tentative valid_lft forever preferred_lft forever # ip a showdump < dump if1: inet6 ::1/128 scope host proto kernel_lo valid_lft forever preferred_lft forever if2: inet6 1::3/128 scope global tentative valid_lft forever preferred_lft forever if2: inet6 1::2/128 scope global tentative valid_lft forever preferred_lft forever if2: inet6 1::1/128 scope global tentative valid_lft forever preferred_lft forever b. Addresses in pasta to appear in reversed order compared to host addresses. The ipv6 addresses were added in reverse order by commit e55ffac60117 ("[IPV6]: order addresses by scope"), then it was changed by commit 502a2ffd7376 ("ipv6: convert idev_list to list macros"), and restored by commit b54c9b98bbfb ("ipv6: Preserve pervious behavior in ipv6_link_dev_addr()."). However, this reverse ordering within the same scope causes inconsistency with IPv4 and the issues described above. This patch aligns IPv6 address ordering with IPv4 for consistency by changing the comparison from >= to > when inserting addresses into the address list. Also updates the ioam6 selftest to reflect the new address ordering behavior. Combine these two changes into one patch for bisectability. Link: https://bugs.passt.top/show_bug.cgi?id=175 Suggested-by: Stefano Brivio Signed-off-by: Yumei Huang Acked-by: Justin Iurman Reviewed-by: David Ahern Link: https://patch.msgid.link/20260104032357.38555-1-yuhuang@redhat.com Signed-off-by: Jakub Kicinski

selftests: net: add new ioam tests

2024-10-04T22:34:07Z

This patch re-adds the (updated) ioam selftests with support for the tunsrc feature. Signed-off-by: Justin Iurman Link: https://patch.msgid.link/20241002162731.19847-3-justin.iurman@uliege.be Signed-off-by: Jakub Kicinski

selftests: net: remove ioam tests

2024-10-04T22:34:07Z

This patch entirely removes the ioam selftests to prepare for the next patch in this series, which re-adds the new ioam selftests for better readability. Signed-off-by: Justin Iurman Link: https://patch.msgid.link/20241002162731.19847-2-justin.iurman@uliege.be Signed-off-by: Jakub Kicinski

selftests: ioam: refactoring to align with the fix

2024-02-22T08:28:03Z

ioam6_parser uses a packet socket. After the fix to prevent writing to cloned skb's, the receiver does not see its IOAM data anymore, which makes input/forward ioam-selftests to fail. As a workaround, ioam6_parser now uses an IPv6 raw socket and leverages ancillary data to get hop-by-hop options. As a consequence, the hook is "after" the IOAM data insertion by the receiver and all tests are working again. Signed-off-by: Justin Iurman Signed-off-by: Paolo Abeni

selftests/net: convert ioam6.sh to run it in unique namespace

2023-12-05T12:00:56Z

Here is the test result after conversion. ]# ./ioam6.sh -------------------------------------------------------------------------- OUTPUT tests -------------------------------------------------------------------------- TEST: Unknown IOAM namespace (inline mode) [ OK ] TEST: Unknown IOAM namespace (encap mode) [ OK ] TEST: Missing trace room (inline mode) [ OK ] TEST: Missing trace room (encap mode) [ OK ] TEST: Trace type with bit 0 only (inline mode) [ OK ] ... TEST: Full supported trace (encap mode) [ OK ] -------------------------------------------------------------------------- GLOBAL tests -------------------------------------------------------------------------- TEST: Forward - Full supported trace (inline mode) [ OK ] TEST: Forward - Full supported trace (encap mode) [ OK ] - Tests passed: 88 - Tests failed: 0 Acked-by: David Ahern Reviewed-by: Justin Iurman Signed-off-by: Hangbin Liu Signed-off-by: Paolo Abeni

selftests: net: fix IOAM test skip return code

2022-08-02T07:51:31Z

The ioam6.sh test script exits with an error code (1) when tests are skipped due to lack of support from userspace/kernel or not enough permissions. It should return the kselftests SKIP code instead. Reviewed-by: Justin Iurman Signed-off-by: Kleber Sacilotto de Souza Link: https://lore.kernel.org/r/20220801124615.256416-1-kleber.souza@canonical.com Signed-off-by: Paolo Abeni

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2021-10-14T23:50:14Z

tools/testing/selftests/net/ioam6.sh 7b1700e009cc ("selftests: net: modify IOAM tests for undef bits") bf77b1400a56 ("selftests: net: Test for the IOAM encapsulation with IPv6") Signed-off-by: Jakub Kicinski

selftests: net: modify IOAM tests for undef bits

2021-10-12T10:49:49Z

The output behavior for undefined bits is now directly tested inside the bash script. Trying to set an undefined bit should be refused. The input behavior for undefined bits has been removed due to the fact that we would need another sender allowed to set undefined bits. Signed-off-by: Justin Iurman Signed-off-by: David S. Miller

selftests: net: Test for the IOAM encapsulation with IPv6

2021-10-04T11:53:36Z

This patch adds support for testing the encap (ip6ip6) mode of IOAM. Signed-off-by: Justin Iurman Signed-off-by: David S. Miller

selftests: net: improved IOAM tests

2021-08-17T09:50:33Z

As previously discussed with David Ahern, here is a refactored and improved version of the IOAM self-test. It is now more complete and more robust. Now, all tests are divided into three categories: OUTPUT (evaluates the IOAM processing by the sender), INPUT (evaluates the IOAM processing by the receiver) and GLOBAL (evaluates wider use cases that do not fall into the other two categories). Both OUTPUT and INPUT tests only use a two-node topology (alpha and beta), while GLOBAL tests use the entire three-node topology (alpha, beta, gamma). Each test is documented inside its own handler in the (bash) script. Signed-off-by: Justin Iurman Signed-off-by: David S. Miller