On Fri, Jan 15, 2016 at 6:35 PM, Ryota Ozaki <ozak...@netbsd.org> wrote: (snip) >>> BTW, this proposal includes another change; >>> move bpf_mtap to a common place, not doing it >>> in each driver. This change is also needed by >>> the above proposal to ensure to always run bpf >>> in softint. >> >> Be careful, there are multiple BPF hooks in some drivers, e.g. the >> WiFi stack. > > Hmm. Okay, I'll check all hooks... >
I checked ieee80211 stack and WiFi drivers, and noticed that they need another care as you pointed out; ieee80211_input has several bpf_mtap hooks that cannot be moved. In order to run all bpf_mtap (and its variants) in softint, we need another work that makes ieee80211_input run in softint, not just making if_input run in softint. That work is beyond this proposal, so I decided to do softint-ifying bpf in another task later. Thanks, ozaki-r
