[PATCH net 0/4] Allow TX timestamp with UDP GSO

Fixes an issue where TX Timestamps are not arriving on the error queue when UDP_SEGMENT CMSG type is combined with CMSG type SO_TIMESTAMPING.

Also this updates the UDP GSO selftests to optionally stress test this condition, and report the reliability and performance of both TX Timestamping and ZEROCOPY messages.

Fred Klassen (4): net/udp_gso: Allow TX timestamp with UDP GSO net/udpgso_bench_tx: options to exercise TX CMSG net/udpgso_bench_tx: fix sendmmsg on unconnected socket net/udpgso_bench_tx: audit error queue

net/ipv4/udp_offload.c | 4 + tools/testing/selftests/net/udpgso_bench_tx.c | 376 ++++++++++++++++++++++++-- 2 files changed, 358 insertions(+), 22 deletions(-)