This series adds support for storing UDP sockets in sockmap and sockhash. This allows using these maps in reuseport programs on UDP sockets, instead of reuseport sockarrays. We want to use this in our work for BPF based socket dispatch. The first two patches make the sockmap code more generic: anything related to ULP must only be called on TCP sockets, and some of the tcp_bpf hooks can be re-used for UDP. The third patch introduces a new struct psock_hooks, which encapsulates some fiddly state handling required to support IPv6-as-a-module. I'm not particularly fond of it, and would be happy for suggestions on how to make it less obtrusive. The fourth patch adds udp_bpf modeled on tcp_bpf, using struct psock_hooks, and relaxes sockmap update checks. The final patches enable tests. Lorenz Bauer (7): bpf: sockmap: only check ULP for TCP sockets bpf: sockmap: move generic sockmap hooks from BPF TCP skmsg: introduce sk_psock_hooks bpf: sockmap: allow UDP sockets selftests: bpf: don't listen() on UDP sockets selftests: bpf: add tests for UDP sockets in sockmap selftests: bpf: enable UDP sockmap reuseport tests MAINTAINERS | 1 + include/linux/bpf.h | 4 +- include/linux/skmsg.h | 72 ++++---- include/linux/udp.h | 4 + include/net/tcp.h | 1 - net/core/skmsg.c | 52 ++++++ net/core/sock_map.c | 155 +++++++++++----- net/ipv4/Makefile | 1 + net/ipv4/tcp_bpf.c | 169 ++++-------------- net/ipv4/udp_bpf.c | 53 ++++++ .../bpf/prog_tests/select_reuseport.c | 7 - .../selftests/bpf/prog_tests/sockmap_listen.c | 139 ++++++++------ 12 files changed, 381 insertions(+), 277 deletions(-) create mode 100644 net/ipv4/udp_bpf.c -- 2.20.1
