From: Manikanta Pubbisetty mpubbise@codeaurora.org
commit 33d915d9e8ce811d8958915ccd18d71a66c7c495 upstream.
As per the current design, in the case of sw crypto controlled devices, it is the device which advertises the support for AP/VLAN iftype based on it's ability to tranmsit packets encrypted in software (In VLAN functionality, group traffic generated for a specific VLAN group is always encrypted in software). Commit db3bdcb9c3ff ("mac80211: allow AP_VLAN operation on crypto controlled devices") has introduced this change.
Since 4addr AP operation also uses AP/VLAN iftype, this conditional way of advertising AP/VLAN support has broken 4addr AP mode operation on crypto controlled devices which do not support VLAN functionality.
In the case of ath10k driver, not all firmwares have support for VLAN functionality but all can support 4addr AP operation. Because AP/VLAN support is not advertised for these devices, 4addr AP operations are also blocked.
Fix this by allowing 4addr operation on devices which do not support AP/VLAN iftype but can support 4addr AP operation (decision is based on the wiphy flag WIPHY_FLAG_4ADDR_AP).
Cc: stable@vger.kernel.org Fixes: db3bdcb9c3ff ("mac80211: allow AP_VLAN operation on crypto controlled devices") Signed-off-by: Manikanta Pubbisetty mpubbise@codeaurora.org Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- include/net/cfg80211.h | 3 ++- net/mac80211/util.c | 4 +++- net/wireless/core.c | 6 +++++- net/wireless/nl80211.c | 8 ++++++-- 4 files changed, 16 insertions(+), 5 deletions(-)
--- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -3767,7 +3767,8 @@ struct cfg80211_ops { * on wiphy_new(), but can be changed by the driver if it has a good * reason to override the default * @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station - * on a VLAN interface) + * on a VLAN interface). This flag also serves an extra purpose of + * supporting 4ADDR AP mode on devices which do not support AP/VLAN iftype. * @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station * @WIPHY_FLAG_CONTROL_PORT_PROTOCOL: This device supports setting the * control port protocol ethertype. The device also honours the --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -3757,7 +3757,9 @@ int ieee80211_check_combinations(struct }
/* Always allow software iftypes */ - if (local->hw.wiphy->software_iftypes & BIT(iftype)) { + if (local->hw.wiphy->software_iftypes & BIT(iftype) || + (iftype == NL80211_IFTYPE_AP_VLAN && + local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) { if (radar_detect) return -EINVAL; return 0; --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -1396,8 +1396,12 @@ static int cfg80211_netdev_notifier_call } break; case NETDEV_PRE_UP: - if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) + if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) && + !(wdev->iftype == NL80211_IFTYPE_AP_VLAN && + rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP && + wdev->use_4addr)) return notifier_from_errno(-EOPNOTSUPP); + if (rfkill_blocked(rdev->rfkill)) return notifier_from_errno(-ERFKILL); break; --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3385,8 +3385,7 @@ static int nl80211_new_interface(struct if (info->attrs[NL80211_ATTR_IFTYPE]) type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
- if (!rdev->ops->add_virtual_intf || - !(rdev->wiphy.interface_modes & (1 << type))) + if (!rdev->ops->add_virtual_intf) return -EOPNOTSUPP;
if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN || @@ -3405,6 +3404,11 @@ static int nl80211_new_interface(struct return err; }
+ if (!(rdev->wiphy.interface_modes & (1 << type)) && + !(type == NL80211_IFTYPE_AP_VLAN && params.use_4addr && + rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)) + return -EOPNOTSUPP; + err = nl80211_parse_mon_options(rdev, type, info, ¶ms); if (err < 0) return err;