On Thu, Jul 1, 2021 at 1:05 PM Martin KaFai Lau <kafai@xxxxxx> wrote: > > This set is to allow bpf tcp iter to call bpf_(get|set)sockopt. > > With bpf-tcp-cc, new algo rollout happens more often. Instead of > restarting the applications to pick up the new tcp-cc, this set > allows the bpf tcp iter to call bpf_(get|set)sockopt(TCP_CONGESTION). > It is not limited to TCP_CONGESTION, the bpf tcp iter can call > bpf_(get|set)sockopt() with other options. The bpf tcp iter can read > into all the fields of a tcp_sock, so there is a lot of flexibility > to select the desired sk to do setsockopt(), e.g. it can test for > TCP_LISTEN only and leave the established connections untouched, > or check the addr/port, or check the current tcp-cc name, ...etc. > > Patch 1-4 are some cleanup and prep work in the tcp and bpf seq_file. > > Patch 5 is to have the tcp seq_file iterate on the > port+addr lhash2 instead of the port only listening_hash. ... > include/linux/bpf.h | 8 + > include/net/inet_hashtables.h | 6 + > include/net/tcp.h | 1 - > kernel/bpf/bpf_iter.c | 22 + > kernel/trace/bpf_trace.c | 7 +- > net/core/filter.c | 34 ++ > net/ipv4/tcp_ipv4.c | 410 ++++++++++++++---- Eric, Could you please review this set where it touches inet bits? I've looked a few times and it all looks fine to me, but I'm no expert in those parts.
