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rxrpc: Add a reason indicator to the tx_data tracepoint
Add an indicator to the rxrpc_tx_data tracepoint to indicate what triggered the transmission of a particular packet. At this point, it's only normal transmission and retransmission, plus the tracepoint is also used to record loss injection, but in a future patch, TLP-induced (re-)transmission will also be a thing. Signed-off-by: David Howells <dhowells@redhat.com> cc: Marc Dionne <marc.dionne@auristor.com> cc: linux-afs@lists.infradead.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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