net: mctp: test: move TX packetqueue from dst to dev

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To capture TX packets during a test, we are currently intercepting the
dst->output with an implementation that adds the transmitted packet to
a skb queue attached to the test-specific mock dst. The netdev itself is
not involved in the test TX path.

Instead, we can just use our test device to stash TXed packets for later
inspection by the test. This means we can include the actual
mctp_dst_output() implementation in the test (by setting dst.output in
the test case), and don't need to be creating fake dst objects, or their
corresponding skb queues.

We need to ensure that the netdev is up to allow delivery to
ndo_start_xmit, but the tests assume active devices at present anyway.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://patch.msgid.link/20251126-dev-mctp-test-tx-queue-v2-1-4e5bbd1d6c57@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jeremy Kerr 2025-11-26 16:48:54 +08:00 • committed by Jakub Kicinski

parent 56435627d9

commit 6ab578739a

3 changed files with 59 additions and 108 deletions

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109

net/mctp/test/route-test.c

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45

net/mctp/test/utils.c

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13

net/mctp/test/utils.h

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