On Thu, Oct 15, 2015 at 12:01 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > Err. Let's try that again. > > I spent a bit of time thinking about a file format that would be more > extensible, yet still be loadable into the kernel without having to > parse it into new data structures in the kernel, i.e. be easy enough to > read when needed. > > My considerations > * must be extensible in some way > * should be relatively dense/small to not use too much kernel memory > * should still be reasonably easy to parse/read > > I came up with a file format that's similar to the existing > regulatory.bin format, but with the following changes: > * put the DFS region into a reg rule collection > * put the frequency range and power rules directly into each reg rule > (i.e. don't try to normalize them) > * have a length field in the collection and rule structures so that we > can extend them with new fields > * use more compact pointers, i.e. u16 offsets, by aligning everything > to 4 bytes and shifting the offsets by 2 bits, this allows for > 256KiB database files which seems large enough > > More documentation is here: > https://wireless.wiki.kernel.org/en/developers/todo-list/regdb-file > -format > while at it - is there any way to indicate exclusion of some channels? e.g. channels 38/42 in US (the current rule is "(5170 - 5250 @ 40)", which doesn't seem to forbid them) Eliad. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
