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Published 20 hours ago • verified publisher icon microsoft

Generic XDP coexistence with NBL offloads

Open mtfriesen opened this issue 2 years ago • 0 comments

Generic XDP needs to be compatible with:

RSC offload - send OID to disable when non-RSC-aware programs/XSKs are attached Checksum offload - fix up checksum header fields when *ChecksumValueInvalid bits are set in OOB.

Plan for RSC offload:

  1. Add minimal RSC -> LSO direct conversion - assume LSO is directly convertible a. NBL+NB pool b. clear IPv4 csum and set TCP pseudoheader csum c. add functional test

  2. Add LSO configuration awareness a. maintain current offload state b. drop RSC packets > LSO max or < min segments c. add drop statistics d. add functional test

  3. Add RSC -> LSO partial segmentation a. copy L2-L4 headers into preallocated NBL b. copy data partial MDL into preallocated partial MDL c. fix up TCP flags and seq numbers d. read the LSO spec - what else do we need? e. add SW segmentation statistics f. add functional test

  4. spinxsk test a. produce random RSC packets

  5. perf test a. onboard to netperf

mtfriesen avatar Jul 13 '22 19:07 mtfriesen