Re: The mac80211 softmac driver subsystem and handling of monitor interfaces

[Roger James <roger@beardandsandals.co.uk>]

On 15 Mar 2016 13:08, Johannes Berg <johannes@sipsolutions.net> wrote:
 >
 > On Tue, 2016-03-15 at 13:01 +0000, Roger James wrote:
 > >
 > > roger@dragon:~/linux-mainline$ find . -name "*.[ch]" -exec grep -n
 > > IEEE80211_HW_WANT_MONITOR_VIF {} \; -print
 > > 1851: * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be
 > > informed of
 > > 1928:    IEEE80211_HW_WANT_MONITOR_VIF,
 > > ./include/net/mac80211.h
 > >
 > > Is that what you meant. Nobody seems to be using it. Even mac80211
 > > itself. Or am I being stupid again :-)
 > >
 >
 > There are macros generating the checks and setting it, so you want to
 > grep without the IEEE80211_HW_ prefix
 >
 > johannes
 > --


Thanks guys I have got it now.

However that only accounts for the ath10k, iwldvm, and iwlmvm drivers. I 
realise that there is a lot of history here, but is what the remaining 
drivers doing in any way deprecated? Also can anyone give me a heads up 
on what the architectural difference is between hooking the monitor 
config change and and setting the want monitor flag. Is one way 
preferable to the other? Both seem to inform the driver that there is a 
transition between having no monitor virtual interfaces and having one 
or more.

Cheers,

Roger