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Matthieu Baerts efb4f6c2dd selftests: mptcp: join: skip implicit tests if not supported 
commit 36c4127ae8 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 the implicit endpoints introduced by
commit d045b9eb95 ("mptcp: introduce implicit endpoints").

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.

Note that here and in the following commits, we re-do the same check for
each sub-test of the same function for a few reasons. The main one is
not to break the ID assign to each test in order to be able to easily
compare results between different kernel versions. Also, we can still
run a specific test even if it is skipped. Another reason is that it
makes it clear during the review that a specific subtest will be skipped
or not under certain conditions. At the end, it looks OK to call the
exact same helper multiple times: it is not a critical path and it is
the same code that is executed, not really more cases to maintain.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 69c6ce7b6e ("selftests: mptcp: add implicit endpoint test case")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-06-28 11:12:20 +02:00
..
crypto/chacha20-s390 tools/testing/crypto: Use vzalloc instead of vmalloc+memset 2022-07-05 14:46:36 +02:00
cxl tools/testing/cxl: Add a single-port host-bridge regression config 2022-11-04 16:01:24 -07:00
fault-injection docs: fault-injection: convert docs to ReST and rename to *.rst 2019-06-14 14:21:07 -06:00
ktest ktest.pl: Add RUN_TIMEOUT option with default unlimited 2023-03-10 09:34:27 +01:00
kunit kunit: tool: Don't download risc-v opensbi firmware with wget 2022-10-07 10:16:28 -06:00
memblock Revert "mm: Always release pages to the buddy allocator in memblock_free_late()." 2023-02-22 12:59:50 +01:00
nvdimm ndtest: Cleanup all of blk namespace specific code 2022-07-12 17:57:55 -07:00
radix-tree maple_tree: fix write memory barrier of nodes once dead for RCU mode 2023-04-20 12:35:12 +02:00
scatterlist tools/testing/scatterlist: add missing defines 2022-01-30 09:56:58 +02:00
selftests selftests: mptcp: join: skip implicit tests if not supported 2023-06-28 11:12:20 +02:00
vsock vsock_test: POLLIN + SO_RCVLOWAT test 2022-08-23 10:43:12 +02:00