On Fri, 2017-05-12 at 17:11 +0300, Sergey Naumov wrote: > Hi All. > > I see that since iw-4.x "iw reg get" reports multiple region > information - per-phy and global. Moreover, per-phy information could > be marked as "self-managed".
That's also dependent on the kernel. > Could somebody clarify when a driver uses phy-specific region and > when > - the global one? It's just a driver decision, and how the firmware works. > Looking at a list of channels from "iw phy phyX info" I can conclude > that if "self-managed" is true, then phy-specific region is used, > otherwise - the global one. Is it a correct assumption? If yes, then > why phy-specific regions are reported at all for non-self-managed > devices, and why the global region is reported for self-managed ones? Good question, I'm not sure right now. You probably need to look at the kernel's code (net/wireless/reg.c) to figure out the answer. > I think it would be natural to use new "iw phy phyX reg get" command > to report region information that is actually used, but unfortunately > this command returns exactly the same as "iw reg get": It's a pure alias right now, but that could be fixed by filtering in iw I guess. johannes
