Pete Heist <p...@heistp.net> writes: > On Sun, 2021-06-06 at 21:59 +0200, Toke Høiland-Jørgensen wrote: >> Pete Heist <p...@heistp.net> writes: >> >> > I've always wanted a way to customize Cake's host and flow isolation >> > in >> > a way that would be usable e.g. for small ISPs, and this is what I >> > came >> > up with: >> > >> > https://github.com/heistp/cake-custom-isolation >> > >> > ipsets are used to set the skb priority or mark, then tc-flow or a >> > simple eBPF classifier is used in a child filter of cake to get the >> > major and minor class IDs set, which override the host and flow >> > hashes. >> >> Very cool! Awesome to see the customisation options being used for >> something neat like this! :) >> >> > To show it in action, the cakeiso.sh script sets up a netns >> > environment >> > and runs competition between two "subscribers" and three flows, two >> > TCP >> > flows and one unresponsive UDP flow. Several configurations are run >> > to >> > show what is and isn't possible. >> > >> > If anyone knows of a simpler way than eBPF to get both the major and >> > minor class ID set from ipsets, I'd like to hear it, but the included >> > classifiers are at least very simple one-liners... >> >> Well, you could go the other way? Instead of ipset, just do the >> classification in eBPF and use a BPF map to store the IP addresses. >> There's even an LPM map type, so you can use arbitrary prefix lengths >> for each class (or not, and just use a hashmap)... > > True that, I started something like that at some point: > > https://github.com/heistp/tc-users/ > > but I think I got a little overzealous with it. I'm not sure if/when > I'll get back to that, but the ipset solution seems to be "good enough" > for what I (and my ISP) needs. I'm glad you slipped the tc filter > overrides in before Cake went out the door. :)
Yes! I would love to take credit for the idea, but this came from the netdev review. I agree though, great that it ended up in there! > This doesn't do away with the possible need for a full-blown ISP qdisc > one day, with configurable subscriber tiers, handling of higher loads, > etc, but at least it's something for the little guys. Yeah; I have something in the pipeline that will hopefully end up being useable for that, but may take a little while to get there :) -Toke _______________________________________________ Cake mailing list Cake@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cake
