Patch "selftests: mptcp: join: skip MPC backups tests if not supported" has been added to the 6.3-stable tree

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This is a note to let you know that I've just added the patch titled

    selftests: mptcp: join: skip MPC backups tests if not supported

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     selftests-mptcp-join-skip-mpc-backups-tests-if-not-supported.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 632978f0a961b4591a05ba9e39eab24541d83e84 Mon Sep 17 00:00:00 2001
From: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
Date: Sat, 10 Jun 2023 18:11:49 +0200
Subject: selftests: mptcp: join: skip MPC backups tests if not supported

From: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>

commit 632978f0a961b4591a05ba9e39eab24541d83e84 upstream.

Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.

One of them is the support of sending an MP_PRIO signal for the initial
subflow, introduced by commit c157bbe776b7 ("mptcp: allow the in kernel
PM to set MPC subflow priority").

It is possible to look for "mptcp_subflow_send_ack" in kallsyms because
it was needed to introduce the mentioned feature. So we can know in
advance if the feature is supported instead of trying and accepting any
results.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 914f6a59b10f ("selftests: mptcp: add MPC backup tests")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 tools/testing/selftests/net/mptcp/mptcp_join.sh |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -2673,14 +2673,16 @@ backup_tests()
 		chk_prio_nr 1 1
 	fi
 
-	if reset "mpc backup"; then
+	if reset "mpc backup" &&
+	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
 		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
 		chk_join_nr 0 0 0
 		chk_prio_nr 0 1
 	fi
 
-	if reset "mpc backup both sides"; then
+	if reset "mpc backup both sides" &&
+	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow,backup
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
 		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
@@ -2688,14 +2690,16 @@ backup_tests()
 		chk_prio_nr 1 1
 	fi
 
-	if reset "mpc switch to backup"; then
+	if reset "mpc switch to backup" &&
+	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
 		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
 		chk_join_nr 0 0 0
 		chk_prio_nr 0 1
 	fi
 
-	if reset "mpc switch to backup both sides"; then
+	if reset "mpc switch to backup both sides" &&
+	   continue_if mptcp_lib_kallsyms_doesnt_have "mptcp_subflow_send_ack$"; then
 		pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow
 		pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
 		run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup


Patches currently in stable-queue which might be from matthieu.baerts@xxxxxxxxxxxx are

queue-6.3/selftests-mptcp-join-fix-shellcheck-warnings.patch
queue-6.3/selftests-mptcp-join-support-rm_addr-for-used-endpoints-or-not.patch
queue-6.3/selftests-mptcp-pm-nl-skip-fullmesh-flag-checks-if-not-supported.patch
queue-6.3/selftests-mptcp-lib-skip-if-missing-symbol.patch
queue-6.3/selftests-mptcp-join-skip-fullmesh-flag-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-connect-skip-tfo-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-fastclose-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-remove-duplicated-entries-in-usage.patch
queue-6.3/selftests-mptcp-sockopt-skip-getsockopt-checks-if-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-backup-if-set-flag-on-id-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-mixed-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-userspace-pm-skip-if-ip-tool-is-unavailable.patch
queue-6.3/selftests-mptcp-join-helpers-to-skip-tests.patch
queue-6.3/selftests-mptcp-lib-skip-if-not-below-kernel-version.patch
queue-6.3/selftests-mptcp-userspace-pm-skip-if-not-supported.patch
queue-6.3/selftests-mptcp-join-uniform-listener-tests.patch
queue-6.3/selftests-mptcp-diag-skip-listen-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-sockopt-skip-tcp_inq-checks-if-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-test-if-iptables-tc-cmds-fail.patch
queue-6.3/selftests-mptcp-join-skip-implicit-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-userspace-pm-skip-pm-listener-events-tests-if-unavailable.patch
queue-6.3/selftests-mptcp-join-skip-fail-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-sockopt-relax-expected-returned-size.patch
queue-6.3/selftests-mptcp-pm-nl-remove-hardcoded-default-limits.patch
queue-6.3/selftests-mptcp-join-skip-check-if-mib-counter-not-supported.patch
queue-6.3/selftests-mptcp-diag-skip-inuse-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-join-use-iptables-legacy-if-available.patch
queue-6.3/selftests-mptcp-join-support-local-endpoint-being-tracked-or-not.patch
queue-6.3/selftests-mptcp-join-skip-userspace-pm-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-connect-skip-transp-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-mpc-backups-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-join-skip-pm-listener-tests-if-not-supported.patch
queue-6.3/selftests-mptcp-connect-skip-disconnect-tests-if-not-supported.patch



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