Commit 830af02f authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: allow driver to iterate keys 



When in suspend/wowlan, devices might implement crypto
offload differently (more features), and might require
reprogramming keys for the WoWLAN (as it is the case
for Intel devices that use another uCode image). Thus
allow the driver to iterate all keys in this context.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 68dd49ef

include/net/mac80211.h

+23 −0
Original line number Diff line number Diff line
@@ -2849,6 +2849,29 @@ struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 
void ieee80211_sta_block_awake(struct ieee80211_hw *hw,

			       struct ieee80211_sta *pubsta, bool block);



/**

 * ieee80211_iter_keys - iterate keys programmed into the device

 * @hw: pointer obtained from ieee80211_alloc_hw()

 * @vif: virtual interface to iterate, may be %NULL for all

 * @iter: iterator function that will be called for each key

 * @iter_data: custom data to pass to the iterator function

 *

 * This function can be used to iterate all the keys known to

 * mac80211, even those that weren't previously programmed into

 * the device. This is intended for use in WoWLAN if the device

 * needs reprogramming of the keys during suspend. Note that due

 * to locking reasons, it is also only safe to call this at few

 * spots since it must hold the RTNL and be able to sleep.

 */

void ieee80211_iter_keys(struct ieee80211_hw *hw,

			 struct ieee80211_vif *vif,

			 void (*iter)(struct ieee80211_hw *hw,

				      struct ieee80211_vif *vif,

				      struct ieee80211_sta *sta,

				      struct ieee80211_key_conf *key,

				      void *data),

			 void *iter_data);



/**

 * ieee80211_ap_probereq_get - retrieve a Probe Request template

 * @hw: pointer obtained from ieee80211_alloc_hw().

net/mac80211/key.c

+33 −0
Original line number Diff line number Diff line
@@ -551,6 +551,39 @@ void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata) 
	mutex_unlock(&sdata->local->key_mtx);

}



void ieee80211_iter_keys(struct ieee80211_hw *hw,

			 struct ieee80211_vif *vif,

			 void (*iter)(struct ieee80211_hw *hw,

				      struct ieee80211_vif *vif,

				      struct ieee80211_sta *sta,

				      struct ieee80211_key_conf *key,

				      void *data),

			 void *iter_data)

{

	struct ieee80211_local *local = hw_to_local(hw);

	struct ieee80211_key *key;

	struct ieee80211_sub_if_data *sdata;



	ASSERT_RTNL();



	mutex_lock(&local->key_mtx);

	if (vif) {

		sdata = vif_to_sdata(vif);

		list_for_each_entry(key, &sdata->key_list, list)

			iter(hw, &sdata->vif,

			     key->sta ? &key->sta->sta : NULL,

			     &key->conf, iter_data);

	} else {

		list_for_each_entry(sdata, &local->interfaces, list)

			list_for_each_entry(key, &sdata->key_list, list)

				iter(hw, &sdata->vif,

				     key->sta ? &key->sta->sta : NULL,

				     &key->conf, iter_data);

	}

	mutex_unlock(&local->key_mtx);

}

EXPORT_SYMBOL(ieee80211_iter_keys);



void ieee80211_disable_keys(struct ieee80211_sub_if_data *sdata)

{

	struct ieee80211_key *key;

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