• Johannes Berg's avatar
    mac80211: make master netdev handling sane · 3e122be0
    Johannes Berg authored
    Currently, almost every interface type has a 'bss' pointer
    pointing to BSS information. This BSS information, however,
    is for a _local_ BSS, not for the BSS we joined, so having
    it on a STA mode interface makes little sense, but now they
    have it pointing to the master device, which is an AP mode
    virtual interface. However, except for some bitrate control
    data, this pointer is only used in AP/VLAN modes (for power
    saving stations.)
    Overall, it is not necessary to even have the master netdev
    be a valid virtual interface, and it doesn't have to be on
    the list of interfaces either.
    This patch changes the master netdev to be special, it now
     - no longer is on the list of virtual interfaces, which
       lets me remove a lot of tests for that
     - no longer has sub_if_data attached, since that isn't used
    Additionally, this patch changes some vlan/ap mode handling
    that is related to these 'bss' pointers described above (but
    in the VLAN case they actually make sense because there they
    point to the AP they belong to); it also adds some debugging
    code to IEEE80211_DEV_TO_SUB_IF to validate it is not called
    on the master netdev any more.
    Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>