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authorJohannes Berg <johannes.berg@intel.com>2023-01-18 12:51:52 +0300
committerKalle Valo <kvalo@kernel.org>2023-01-19 21:01:41 +0300
commitdc09766c755c5b06d71fe5d2f4f3d431540eaae0 (patch)
treed9f948955f7460d402c4f2e659b88d692d339769 /net/wireless/wext-core.c
parent82253ddaff582147cd3fd0e629c4e65d62b1d015 (diff)
downloadlinux-dc09766c755c5b06d71fe5d2f4f3d431540eaae0.tar.xz
wifi: wireless: warn on most wireless extension usage
With WiFi 7 (802.11ax, MLO/EHT) around the corner, we're going to remove support for wireless extensions with new devices since MLO (multi-link operation) cannot be properly indicated using them. Add a warning to indicate which processes are still using wireless extensions, if being used with modern (i.e. cfg80211) drivers. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20230118105152.a7158a929a6f.Ifcf30eeeb8fc7019e4dcf2782b04515254d165e1@changeid
Diffstat (limited to 'net/wireless/wext-core.c')
-rw-r--r--net/wireless/wext-core.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/net/wireless/wext-core.c b/net/wireless/wext-core.c
index fe8765c4075d..6e5f5ea92ddb 100644
--- a/net/wireless/wext-core.c
+++ b/net/wireless/wext-core.c
@@ -636,7 +636,15 @@ void wireless_send_event(struct net_device * dev,
}
EXPORT_SYMBOL(wireless_send_event);
+#ifdef CONFIG_CFG80211_WEXT
+static void wireless_warn_cfg80211_wext(void)
+{
+ char name[sizeof(current->comm)];
+ pr_warn_ratelimited("warning: `%s' uses wireless extensions that are deprecated for modern drivers; use nl80211\n",
+ get_task_comm(name, current));
+}
+#endif
/* IW handlers */
@@ -652,8 +660,10 @@ struct iw_statistics *get_wireless_stats(struct net_device *dev)
if (dev->ieee80211_ptr &&
dev->ieee80211_ptr->wiphy &&
dev->ieee80211_ptr->wiphy->wext &&
- dev->ieee80211_ptr->wiphy->wext->get_wireless_stats)
+ dev->ieee80211_ptr->wiphy->wext->get_wireless_stats) {
+ wireless_warn_cfg80211_wext();
return dev->ieee80211_ptr->wiphy->wext->get_wireless_stats(dev);
+ }
#endif
/* not found */
@@ -690,8 +700,10 @@ static iw_handler get_handler(struct net_device *dev, unsigned int cmd)
const struct iw_handler_def *handlers = NULL;
#ifdef CONFIG_CFG80211_WEXT
- if (dev->ieee80211_ptr && dev->ieee80211_ptr->wiphy)
+ if (dev->ieee80211_ptr && dev->ieee80211_ptr->wiphy) {
+ wireless_warn_cfg80211_wext();
handlers = dev->ieee80211_ptr->wiphy->wext;
+ }
#endif
#ifdef CONFIG_WIRELESS_EXT
if (dev->wireless_handlers)