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{nl,mac}80211: allow 4addr AP operation on crypto controlled devices

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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 db3bdcb9c3
("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: db3bdcb9c3 ("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>
This commit is contained in:
Manikanta Pubbisetty
2019-05-08 14:55:33 +05:30
committed by Johannes Berg
parent 85a55ff2cf
commit 33d915d9e8
4 changed files with 16 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
net/wireless/core.c
View File

@@ -1396,8 +1396,12 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
}
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;