Commit 348baf0e authored by Johannes Berg's avatar Johannes Berg
Browse files

nl80211: send event when AP operation is stopped 



There are a few cases, e.g. suspend, where an AP interface is
stopped by the kernel rather than by userspace request, most
commonly when suspending. To let userspace know about this,
send the NL80211_CMD_STOP_AP command as an event every time
an AP interface is stopped. This also happens when userspace
did in fact request the AP stop, but that's not a problem.

For full-MAC drivers this may need to be extended to also
cover cases where the device stopped the AP operation for
some reason, this a bit more complicated because then all
cfg80211 state also needs to be reset; such API is not part
of this patch.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent d8ca16db

net/wireless/ap.c

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ static int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, 
		wdev->channel = NULL;

		wdev->ssid_len = 0;

		rdev_set_qos_map(rdev, dev, NULL);

		nl80211_send_ap_stopped(wdev);

	}



	return err;

net/wireless/nl80211.c

+29 −0
Original line number Diff line number Diff line
@@ -11677,6 +11677,35 @@ void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp) 
}

EXPORT_SYMBOL(cfg80211_crit_proto_stopped);



void nl80211_send_ap_stopped(struct wireless_dev *wdev)

{

	struct wiphy *wiphy = wdev->wiphy;

	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);

	struct sk_buff *msg;

	void *hdr;



	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);

	if (!msg)

		return;



	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);

	if (!hdr)

		goto out;



	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||

	    nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||

	    nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))

		goto out;



	genlmsg_end(msg, hdr);



	genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,

				NL80211_MCGRP_MLME, GFP_KERNEL);

	return;

 out:

	nlmsg_free(msg);

}



/* initialisation/exit functions */



int nl80211_init(void)

net/wireless/nl80211.h

+2 −0
Original line number Diff line number Diff line
@@ -74,6 +74,8 @@ nl80211_radar_notify(struct cfg80211_registered_device *rdev, 
		     enum nl80211_radar_event event,

		     struct net_device *netdev, gfp_t gfp);



void nl80211_send_ap_stopped(struct wireless_dev *wdev);



void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev);



#endif /* __NET_WIRELESS_NL80211_H */

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