To ensure that we do not regress, when adding options, please consider (just a general suggestion, not a strong request for this patch set) updating the kselftest to run a variant of the test with the new code coverage. In this case, make the code pass/fail instead of only user interpretable and add variants to udpgso.sh.
I had a look at how kselftest works, and I absolutely want to see this work with these changes. I’ll investigate and implement in v2 patch.
I will most likely do a 5 second test. This seems to be sufficient to get meaningful results
can use more precise CMSG_SPACE based on worst case expectations, like in udp_sendmmsg
char buf[1500];no need for payload
+static void flush_errqueue(int fd) +{
if (cfg_poll) {struct pollfd fds = { 0 };int ret;fds.fd = fd;fds.events = POLLERR;no need to pass POLLERR, it is always returned in revents.