From: Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> Date: Thu, 13 May 2021 14:27:13 -0700 > On Sun, May 9, 2021 at 8:45 PM Kuniyuki Iwashima <kuniyu@xxxxxxxxxxxx> wrote: > > > > The SO_REUSEPORT option allows sockets to listen on the same port and to > > accept connections evenly. However, there is a defect in the current > > implementation [1]. When a SYN packet is received, the connection is tied > > to a listening socket. Accordingly, when the listener is closed, in-flight > > requests during the three-way handshake and child sockets in the accept > > queue are dropped even if other listeners on the same port could accept > > such connections. [...] > > One test is failing in CI ([0]), please take a look. > > [0] https://travis-ci.com/github/kernel-patches/bpf/builds/225784969 Thank you for checking. The test needs to drop SYN+ACK and currently it is done by iptables or ip6tables. But it seems that I should not use them. Should this be done by XDP? ---8<--- iptables v1.8.5 (legacy): can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. ip6tables v1.8.5 (legacy): can't initialize ip6tables table `filter': Table does not exist (do you need to insmod?) Perhaps ip6tables or your kernel needs to be upgraded. ---8<---
