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selftests: xsk: real device testing support
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[v5,bpf-next,0/6] selftests: xsk: real device testing support
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[v5,bpf-next,1/6] selftests: xsk: query for native XDP support
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[v5,bpf-next,2/6] selftests: xsk: introduce default Rx pkt stream
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[v5,bpf-next,3/6] selftests: xsk: increase chars for interface name
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[v5,bpf-next,4/6] selftests: xsk: add support for executing tests on physical device
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[v5,bpf-next,5/6] selftests: xsk: make sure single threaded test terminates
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[v5,bpf-next,6/6] selftests: xsk: add support for zero copy testing
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v4->v5: * ice patches have gone through its own way, so they are out of this revision * rebase * close prog fd on error path in patch 1 (John) * pull out patch for closing netns fd and send it separately (John) * remove a patch that made Tx completion rely on pkts_in_flight (John) v3->v4: * use ice_{down,up} rather than ice_{stop,open} and check retvals when toggling loopback mode (Jakub) * Remove patch that was throwing away xsk->outstanding_tx (Magnus) v2->v3: * split loopback patch to ice_set_features() refactor part and other part with actual loopback toggling support (Alexandr) * collect more acks from Magnus v1->v2: * collect acks from Magnus * drop redundant 'ret' variable in patch 4 (Magnus) * drop redundant assignments to ifobject->xdp_flags in patch 10 (Magnus) * use NETIF_F_LOOPBACK instead of introducing priv-flag (Alexandr) Hi! This set makes it possible to use xskxceiver against real devices that support MAC loopback. Currently, xskxceiver assumes that underlying device supports native XDP. It is true for veth, but might not be for other device that might be used with xskxceiver once this patch set land. So, first patch adds a logic to find out if underlying device supports XDP so that TEST_MODE_DRV can be used for test suite. In patch 2, default Rx pkt stream is added so physical device testing will be able to use shared UMEM in a way that Tx will utilize first half of buffer space and Rx second one. Then, patch 4 adds support for running xskxceiver on physical devices. Patch 6 finally adds new TEST_MODE_ZC for testing zero copy AF_XDP driver support. This work already allowed us to spot and fix two bugs in AF_XDP kernel side ([0], [1]). v1 is here [2]. v2 is here [3]. v3 is here [4]. v4 is here [5]. [0]: https://lore.kernel.org/bpf/20220425153745.481322-1-maciej.fijalkowski@intel.com/ [1]: https://lore.kernel.org/bpf/20220607142200.576735-1-maciej.fijalkowski@intel.com/ [2]: https://lore.kernel.org/bpf/20220610150923.583202-1-maciej.fijalkowski@intel.com/ [3]: https://lore.kernel.org/bpf/20220614174749.901044-1-maciej.fijalkowski@intel.com/ [4]: https://lore.kernel.org/bpf/20220615161041.902916-1-maciej.fijalkowski@intel.com/ [5]: https://lore.kernel.org/bpf/20220616180609.905015-1-maciej.fijalkowski@intel.com/ Thank you. Maciej Fijalkowski (6): selftests: xsk: query for native XDP support selftests: xsk: introduce default Rx pkt stream selftests: xsk: increase chars for interface name selftests: xsk: add support for executing tests on physical device selftests: xsk: make sure single threaded test terminates selftests: xsk: add support for zero copy testing tools/testing/selftests/bpf/test_xsk.sh | 52 ++- tools/testing/selftests/bpf/xskxceiver.c | 399 +++++++++++++++++------ tools/testing/selftests/bpf/xskxceiver.h | 9 +- 3 files changed, 339 insertions(+), 121 deletions(-)