[PATCH 0/4] pdump: fix capture on ports with hairpin queues

[Stephen Hemminger <stephen@networkplumber.org>]

This was reported on dpdk slack channel.

dpdk-dumpcap fails on a port with hairpin queues. The first attempt
reports "Unknown error -22" and every later attempt fails with EEXIST
until the application is restarted.

Several bugs combine: pdump tries to add callbacks to hairpin queues,
the error is returned with the wrong sign, and a partially enabled
capture is not undone. Also the first Rx callback API was missing the
hairpin check the other callback APIs have.

Stephen Hemminger (4):
  ethdev: reject hairpin queue in add first Rx callback
  pdump: fix error code when adding callback fails
  pdump: skip hairpin queues
  pdump: undo partial enable on failure

 lib/ethdev/rte_ethdev.c |   5 ++
 lib/pdump/rte_pdump.c   | 112 +++++++++++++++++++++++++++++++++-------
 2 files changed, 98 insertions(+), 19 deletions(-)

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2.53.0