Hi Paolo, > -----Original Message----- > From: Paolo Valerio <pvale...@redhat.com> > Sent: Wednesday, January 27, 2021 21:50 > To: dev@dpdk.org > Cc: Guo, Jia <jia....@intel.com>; Wang, Haiyue <haiyue.w...@intel.com>; Aaron > Conole > <acon...@redhat.com> > Subject: ixgbe and UDP with zero checksum > > Hi, > > performing some tests, I noticed that on ixgbe when receiving UDP > packets with zero checksum (no checksum) over IPv4, the corresponding > ol_flag for the l4 checksum is set to PKT_RX_L4_CKSUM_BAD. > > In particular, this apparently has an impact on OvS using ct() action > where UDP packets with zero checksum are not tracked because of that.
> > [1] > https://patchwork.ozlabs.org/project/netdev/patch/20090724040031.30202.1531.stgit@localhost.localdomai > n/ About 12 years old patch, it is hardware errata. For fixing this, have to always disable vector Rx path for 82599, it seems not a good idea to bring in this workaround. :( + /* + * 82599 errata, UDP frames with a 0 checksum can be marked as + * checksum errors. + */ + if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) && + (adapter->hw.mac.type == ixgbe_mac_82599EB)) + return; > > Regards, > Paolo
