Question about test_xsk.sh

["Alexis Lothoré" <alexis.lothore@bootlin.com>]

Hello all,

I was looking  at other test candidates for conversion to bpf test_progs
framework (to increase automatic testing scope) and found test_xsk.sh, which
does not seem to have coverage yet in test_progs. This test validates the AF_XDP
socket behavior with different XDP modes (SKB, DRV, zero copy) and socket
configuration (normal, busy polling).

The testing program looks pretty big, considering all files involved
(test_xsk.sh, xskxceiver.c, xsk.c, the different XDP programs) and the matrix of
tests it runs. So before really diving into it, I would like to ask:
- is it indeed a good/relevant target for integration in test_progs (all tests
look like functional tests, so I guess it is) ?
- if so, is there anyone already working on this ?
- multiple commits on xskxceiver.c hint that the program is also used for
testing on real hardware, could someone confirm that it is still the case
(similar need has been seen with test_xdp_features.sh for example) ? If so, it
means that the current form must be preserved, and it would be an additional
integration into test_progs rather a conversion (then most of the code should be
shared between the non-test_progs and the test_progs version)

Thanks,

Alexis

-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com