On Thu, Aug 20, 2020 at 12:00 PM Martin KaFai Lau <kafai@xxxxxx> wrote: > > The earlier effort in BPF-TCP-CC allows the TCP Congestion Control > algorithm to be written in BPF. It opens up opportunities to allow > a faster turnaround time in testing/releasing new congestion control > ideas to production environment. > > The same flexibility can be extended to writing TCP header option. > It is not uncommon that people want to test new TCP header option > to improve the TCP performance. Another use case is for data-center > that has a more controlled environment and has more flexibility in > putting header options for internal traffic only. > > This patch set introduces the necessary BPF logic and API to > allow bpf program to write and parse header options. > > There are also some changes to TCP and they are mostly to provide > the needed sk and skb info to the bpf program to make decision. > > Patch 9 is the main patch and has more details on the API and design. > > The set includes an example which sends the max delay ack in > the BPF TCP header option and the receiving side can > then adjust its RTO accordingly. > > v5: > - Move some of the comments from git commit message to the UAPI bpf.h > in patch 9 > > - Some variable clean up in the tests (patch 11). Applied. Thanks!
