wireless: deprecate WDS and disable by default
The old WDS 4-addr frame support is very limited, e.g.
* no encryption is possible on such links
* it cannot support rate/HT/VHT negotiation
* management APIs are very restricted
These make the WDS legacy mode useless in practice.
All of these are resolved by the 4-addr AP/client support,
so there's also no reason to improve WDS in the future.
Therefore, add a Kconfig option to disable legacy WDS.
This gives people an "emergency valve" while they migrate
to the better-supported 4-addr AP/client option; we plan
to remove it (and the associated cfg80211/mac80211 code,
which is the ultimate goal) in the future.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 8201e6d..f433f15 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -571,6 +571,11 @@ static int wiphy_verify_combinations(struct wiphy *wiphy)
return -EINVAL;
}
+#ifndef CONFIG_WIRELESS_WDS
+ if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
+ return -EINVAL;
+#endif
+
/* You can't even choose that many! */
if (WARN_ON(cnt < c->max_interfaces))
return -EINVAL;
@@ -609,6 +614,11 @@ int wiphy_register(struct wiphy *wiphy)
!rdev->ops->add_nan_func || !rdev->ops->del_nan_func)))
return -EINVAL;
+#ifndef CONFIG_WIRELESS_WDS
+ if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
+ return -EINVAL;
+#endif
+
/*
* if a wiphy has unsupported modes for regulatory channel enforcement,
* opt-out of enforcement checking