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selftests: mptcp: join: restrict fullmesh endp on 1st sf

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BugLink: https://bugs.launchpad.net/bugs/2084005

commit 49ac6f05ace5bb0070c68a0193aa05d3c25d4c83 upstream.

A new endpoint using the IP of the initial subflow has been recently
added to increase the code coverage. But it breaks the test when using
old kernels not having commit 86e39e0448 ("mptcp: keep track of local
endpoint still available for each msk"), e.g. on v5.15.

Similar to commit d4c81bbb86 ("selftests: mptcp: join: support local
endpoint being tracked or not"), it is possible to add the new endpoint
conditionally, by checking if "mptcp_pm_subflow_check_next" is present
in kallsyms: this is not directly linked to the commit introducing this
symbol but for the parent one which is linked anyway. So we can know in
advance what will be the expected behaviour, and add the new endpoint
only when it makes sense to do so.

Fixes: 4878f9f8421f ("selftests: mptcp: join: validate fullmesh endp on 1st sf")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20240910-net-selftests-mptcp-fix-install-v1-1-8f124aa9156d@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 7e2e638c59092c7e8775300ed122e2196496ed3a v6.6.52)
[koichiroden: future commit which fixes the previous commit "selftests:
mptcp: join: validate fullmesh endp on 1st sf"]
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Matthieu Baerts (NGI0)
2024-09-10 21:06:36 +02:00
committed by Mehmet Basaran
parent 9fd78bdbd1
commit d08415a38d
1 changed files with 3 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/testing/selftests/net/mptcp/mptcp_join.sh
+3 -1
View File
@@ -3236,7 +3236,9 @@ fullmesh_tests()
pm_nl_set_limits $ns1 1 3
pm_nl_set_limits $ns2 1 3
pm_nl_add_endpoint $ns1 10.0.2.1 flags signal
pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,fullmesh
if mptcp_lib_kallsyms_has "mptcp_pm_subflow_check_next$"; then
pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,fullmesh
fi
fullmesh=1 speed=slow \
run_tests $ns1 $ns2 10.0.1.1
chk_join_nr 3 3 3