mac80211: move off-channel/mgmt-tx code to offchannel.c
This is quite a bit of code that logically depends here since it has to deal with all the remain-on-channel logic. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
Родитель
e673a65952
Коммит
a2fcfccbad
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@ -2504,294 +2504,6 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
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return 0;
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return 0;
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}
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}
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static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
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struct ieee80211_roc_work *new_roc,
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struct ieee80211_roc_work *cur_roc)
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{
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unsigned long now = jiffies;
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unsigned long remaining = cur_roc->hw_start_time +
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msecs_to_jiffies(cur_roc->duration) -
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now;
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if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
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return false;
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/* if it doesn't fit entirely, schedule a new one */
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if (new_roc->duration > jiffies_to_msecs(remaining))
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return false;
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ieee80211_handle_roc_started(new_roc);
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/* add to dependents so we send the expired event properly */
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list_add_tail(&new_roc->list, &cur_roc->dependents);
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return true;
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}
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static u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
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{
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lockdep_assert_held(&local->mtx);
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local->roc_cookie_counter++;
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/* wow, you wrapped 64 bits ... more likely a bug */
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if (WARN_ON(local->roc_cookie_counter == 0))
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local->roc_cookie_counter++;
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return local->roc_cookie_counter;
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}
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static int ieee80211_start_roc_work(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_channel *channel,
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unsigned int duration, u64 *cookie,
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struct sk_buff *txskb,
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enum ieee80211_roc_type type)
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{
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struct ieee80211_roc_work *roc, *tmp;
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bool queued = false;
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int ret;
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lockdep_assert_held(&local->mtx);
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if (local->use_chanctx && !local->ops->remain_on_channel)
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return -EOPNOTSUPP;
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roc = kzalloc(sizeof(*roc), GFP_KERNEL);
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if (!roc)
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return -ENOMEM;
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/*
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* If the duration is zero, then the driver
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* wouldn't actually do anything. Set it to
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* 10 for now.
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*
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* TODO: cancel the off-channel operation
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* when we get the SKB's TX status and
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* the wait time was zero before.
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*/
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if (!duration)
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duration = 10;
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roc->chan = channel;
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roc->duration = duration;
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roc->req_duration = duration;
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roc->frame = txskb;
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roc->type = type;
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roc->sdata = sdata;
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INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
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INIT_LIST_HEAD(&roc->dependents);
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/*
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* cookie is either the roc cookie (for normal roc)
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* or the SKB (for mgmt TX)
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*/
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if (!txskb) {
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roc->cookie = ieee80211_mgmt_tx_cookie(local);
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*cookie = roc->cookie;
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} else {
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roc->mgmt_tx_cookie = *cookie;
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}
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/* if there's one pending or we're scanning, queue this one */
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if (!list_empty(&local->roc_list) ||
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local->scanning || ieee80211_is_radar_required(local))
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goto out_check_combine;
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/* if not HW assist, just queue & schedule work */
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if (!local->ops->remain_on_channel) {
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ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
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goto out_queue;
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}
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/* otherwise actually kick it off here (for error handling) */
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ret = drv_remain_on_channel(local, sdata, channel, duration, type);
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if (ret) {
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kfree(roc);
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return ret;
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}
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roc->started = true;
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goto out_queue;
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out_check_combine:
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list_for_each_entry(tmp, &local->roc_list, list) {
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if (tmp->chan != channel || tmp->sdata != sdata)
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continue;
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/*
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* Extend this ROC if possible:
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*
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* If it hasn't started yet, just increase the duration
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* and add the new one to the list of dependents.
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* If the type of the new ROC has higher priority, modify the
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* type of the previous one to match that of the new one.
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*/
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if (!tmp->started) {
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list_add_tail(&roc->list, &tmp->dependents);
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tmp->duration = max(tmp->duration, roc->duration);
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tmp->type = max(tmp->type, roc->type);
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queued = true;
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break;
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}
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/* If it has already started, it's more difficult ... */
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if (local->ops->remain_on_channel) {
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/*
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* In the offloaded ROC case, if it hasn't begun, add
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* this new one to the dependent list to be handled
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* when the master one begins. If it has begun,
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* check if it fits entirely within the existing one,
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* in which case it will just be dependent as well.
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* Otherwise, schedule it by itself.
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*/
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if (!tmp->hw_begun) {
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list_add_tail(&roc->list, &tmp->dependents);
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queued = true;
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break;
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}
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if (ieee80211_coalesce_started_roc(local, roc, tmp))
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queued = true;
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} else if (del_timer_sync(&tmp->work.timer)) {
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unsigned long new_end;
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/*
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* In the software ROC case, cancel the timer, if
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* that fails then the finish work is already
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* queued/pending and thus we queue the new ROC
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* normally, if that succeeds then we can extend
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* the timer duration and TX the frame (if any.)
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*/
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list_add_tail(&roc->list, &tmp->dependents);
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queued = true;
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new_end = jiffies + msecs_to_jiffies(roc->duration);
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/* ok, it was started & we canceled timer */
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if (time_after(new_end, tmp->work.timer.expires))
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mod_timer(&tmp->work.timer, new_end);
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else
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add_timer(&tmp->work.timer);
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ieee80211_handle_roc_started(roc);
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}
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break;
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}
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out_queue:
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if (!queued)
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list_add_tail(&roc->list, &local->roc_list);
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return 0;
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}
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static int ieee80211_remain_on_channel(struct wiphy *wiphy,
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struct wireless_dev *wdev,
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struct ieee80211_channel *chan,
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unsigned int duration,
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u64 *cookie)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
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struct ieee80211_local *local = sdata->local;
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int ret;
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mutex_lock(&local->mtx);
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ret = ieee80211_start_roc_work(local, sdata, chan,
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duration, cookie, NULL,
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IEEE80211_ROC_TYPE_NORMAL);
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mutex_unlock(&local->mtx);
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return ret;
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}
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static int ieee80211_cancel_roc(struct ieee80211_local *local,
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u64 cookie, bool mgmt_tx)
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{
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struct ieee80211_roc_work *roc, *tmp, *found = NULL;
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int ret;
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mutex_lock(&local->mtx);
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list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
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struct ieee80211_roc_work *dep, *tmp2;
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list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
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if (!mgmt_tx && dep->cookie != cookie)
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continue;
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else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
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continue;
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/* found dependent item -- just remove it */
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list_del(&dep->list);
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mutex_unlock(&local->mtx);
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ieee80211_roc_notify_destroy(dep, true);
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return 0;
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}
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if (!mgmt_tx && roc->cookie != cookie)
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continue;
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else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
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continue;
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found = roc;
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break;
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}
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if (!found) {
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mutex_unlock(&local->mtx);
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return -ENOENT;
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}
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/*
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* We found the item to cancel, so do that. Note that it
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* may have dependents, which we also cancel (and send
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* the expired signal for.) Not doing so would be quite
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* tricky here, but we may need to fix it later.
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*/
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if (local->ops->remain_on_channel) {
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if (found->started) {
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ret = drv_cancel_remain_on_channel(local);
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if (WARN_ON_ONCE(ret)) {
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mutex_unlock(&local->mtx);
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return ret;
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}
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}
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list_del(&found->list);
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if (found->started)
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ieee80211_start_next_roc(local);
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mutex_unlock(&local->mtx);
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ieee80211_roc_notify_destroy(found, true);
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} else {
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/* work may be pending so use it all the time */
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found->abort = true;
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ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
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mutex_unlock(&local->mtx);
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/* work will clean up etc */
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flush_delayed_work(&found->work);
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WARN_ON(!found->to_be_freed);
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kfree(found);
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}
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return 0;
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}
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static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
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struct wireless_dev *wdev,
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u64 cookie)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
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struct ieee80211_local *local = sdata->local;
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return ieee80211_cancel_roc(local, cookie, false);
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}
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static int ieee80211_start_radar_detection(struct wiphy *wiphy,
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static int ieee80211_start_radar_detection(struct wiphy *wiphy,
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struct net_device *dev,
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struct net_device *dev,
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struct cfg80211_chan_def *chandef,
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struct cfg80211_chan_def *chandef,
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@ -3262,9 +2974,22 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
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return err;
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return err;
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}
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}
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static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
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u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local)
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struct sk_buff *skb, u64 *cookie,
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{
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gfp_t gfp)
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lockdep_assert_held(&local->mtx);
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local->roc_cookie_counter++;
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/* wow, you wrapped 64 bits ... more likely a bug */
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if (WARN_ON(local->roc_cookie_counter == 0))
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local->roc_cookie_counter++;
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return local->roc_cookie_counter;
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}
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struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
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struct sk_buff *skb, u64 *cookie,
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gfp_t gfp)
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{
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{
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unsigned long spin_flags;
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unsigned long spin_flags;
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struct sk_buff *ack_skb;
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struct sk_buff *ack_skb;
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@ -3292,203 +3017,6 @@ static struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
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return ack_skb;
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return ack_skb;
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}
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}
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static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
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struct cfg80211_mgmt_tx_params *params,
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u64 *cookie)
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{
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struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb, *ack_skb;
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struct sta_info *sta;
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const struct ieee80211_mgmt *mgmt = (void *)params->buf;
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bool need_offchan = false;
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u32 flags;
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int ret;
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u8 *data;
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if (params->dont_wait_for_ack)
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flags = IEEE80211_TX_CTL_NO_ACK;
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else
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flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
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IEEE80211_TX_CTL_REQ_TX_STATUS;
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if (params->no_cck)
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flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_ADHOC:
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if (!sdata->vif.bss_conf.ibss_joined)
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need_offchan = true;
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/* fall through */
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#ifdef CONFIG_MAC80211_MESH
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case NL80211_IFTYPE_MESH_POINT:
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if (ieee80211_vif_is_mesh(&sdata->vif) &&
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!sdata->u.mesh.mesh_id_len)
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need_offchan = true;
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/* fall through */
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#endif
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_AP_VLAN:
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case NL80211_IFTYPE_P2P_GO:
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if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
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!ieee80211_vif_is_mesh(&sdata->vif) &&
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!rcu_access_pointer(sdata->bss->beacon))
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need_offchan = true;
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if (!ieee80211_is_action(mgmt->frame_control) ||
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mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
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mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
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mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
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break;
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rcu_read_lock();
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sta = sta_info_get(sdata, mgmt->da);
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rcu_read_unlock();
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if (!sta)
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return -ENOLINK;
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break;
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||||||
case NL80211_IFTYPE_STATION:
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|
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case NL80211_IFTYPE_P2P_CLIENT:
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|
||||||
sdata_lock(sdata);
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||||||
if (!sdata->u.mgd.associated ||
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||||||
(params->offchan && params->wait &&
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|
||||||
local->ops->remain_on_channel &&
|
|
||||||
memcmp(sdata->u.mgd.associated->bssid,
|
|
||||||
mgmt->bssid, ETH_ALEN)))
|
|
||||||
need_offchan = true;
|
|
||||||
sdata_unlock(sdata);
|
|
||||||
break;
|
|
||||||
case NL80211_IFTYPE_P2P_DEVICE:
|
|
||||||
need_offchan = true;
|
|
||||||
break;
|
|
||||||
default:
|
|
||||||
return -EOPNOTSUPP;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* configurations requiring offchan cannot work if no channel has been
|
|
||||||
* specified
|
|
||||||
*/
|
|
||||||
if (need_offchan && !params->chan)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
mutex_lock(&local->mtx);
|
|
||||||
|
|
||||||
/* Check if the operating channel is the requested channel */
|
|
||||||
if (!need_offchan) {
|
|
||||||
struct ieee80211_chanctx_conf *chanctx_conf;
|
|
||||||
|
|
||||||
rcu_read_lock();
|
|
||||||
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
|
||||||
|
|
||||||
if (chanctx_conf) {
|
|
||||||
need_offchan = params->chan &&
|
|
||||||
(params->chan !=
|
|
||||||
chanctx_conf->def.chan);
|
|
||||||
} else if (!params->chan) {
|
|
||||||
ret = -EINVAL;
|
|
||||||
rcu_read_unlock();
|
|
||||||
goto out_unlock;
|
|
||||||
} else {
|
|
||||||
need_offchan = true;
|
|
||||||
}
|
|
||||||
rcu_read_unlock();
|
|
||||||
}
|
|
||||||
|
|
||||||
if (need_offchan && !params->offchan) {
|
|
||||||
ret = -EBUSY;
|
|
||||||
goto out_unlock;
|
|
||||||
}
|
|
||||||
|
|
||||||
skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
|
|
||||||
if (!skb) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out_unlock;
|
|
||||||
}
|
|
||||||
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
||||||
|
|
||||||
data = skb_put(skb, params->len);
|
|
||||||
memcpy(data, params->buf, params->len);
|
|
||||||
|
|
||||||
/* Update CSA counters */
|
|
||||||
if (sdata->vif.csa_active &&
|
|
||||||
(sdata->vif.type == NL80211_IFTYPE_AP ||
|
|
||||||
sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
|
|
||||||
sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
|
|
||||||
params->n_csa_offsets) {
|
|
||||||
int i;
|
|
||||||
struct beacon_data *beacon = NULL;
|
|
||||||
|
|
||||||
rcu_read_lock();
|
|
||||||
|
|
||||||
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
||||||
beacon = rcu_dereference(sdata->u.ap.beacon);
|
|
||||||
else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
|
|
||||||
beacon = rcu_dereference(sdata->u.ibss.presp);
|
|
||||||
else if (ieee80211_vif_is_mesh(&sdata->vif))
|
|
||||||
beacon = rcu_dereference(sdata->u.mesh.beacon);
|
|
||||||
|
|
||||||
if (beacon)
|
|
||||||
for (i = 0; i < params->n_csa_offsets; i++)
|
|
||||||
data[params->csa_offsets[i]] =
|
|
||||||
beacon->csa_current_counter;
|
|
||||||
|
|
||||||
rcu_read_unlock();
|
|
||||||
}
|
|
||||||
|
|
||||||
IEEE80211_SKB_CB(skb)->flags = flags;
|
|
||||||
|
|
||||||
skb->dev = sdata->dev;
|
|
||||||
|
|
||||||
if (!params->dont_wait_for_ack) {
|
|
||||||
/* make a copy to preserve the frame contents
|
|
||||||
* in case of encryption.
|
|
||||||
*/
|
|
||||||
ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
|
|
||||||
GFP_KERNEL);
|
|
||||||
if (IS_ERR(ack_skb)) {
|
|
||||||
ret = PTR_ERR(ack_skb);
|
|
||||||
kfree_skb(skb);
|
|
||||||
goto out_unlock;
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
/* Assign a dummy non-zero cookie, it's not sent to
|
|
||||||
* userspace in this case but we rely on its value
|
|
||||||
* internally in the need_offchan case to distinguish
|
|
||||||
* mgmt-tx from remain-on-channel.
|
|
||||||
*/
|
|
||||||
*cookie = 0xffffffff;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!need_offchan) {
|
|
||||||
ieee80211_tx_skb(sdata, skb);
|
|
||||||
ret = 0;
|
|
||||||
goto out_unlock;
|
|
||||||
}
|
|
||||||
|
|
||||||
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
|
|
||||||
IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
|
|
||||||
if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
|
|
||||||
IEEE80211_SKB_CB(skb)->hw_queue =
|
|
||||||
local->hw.offchannel_tx_hw_queue;
|
|
||||||
|
|
||||||
/* This will handle all kinds of coalescing and immediate TX */
|
|
||||||
ret = ieee80211_start_roc_work(local, sdata, params->chan,
|
|
||||||
params->wait, cookie, skb,
|
|
||||||
IEEE80211_ROC_TYPE_MGMT_TX);
|
|
||||||
if (ret)
|
|
||||||
ieee80211_free_txskb(&local->hw, skb);
|
|
||||||
out_unlock:
|
|
||||||
mutex_unlock(&local->mtx);
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
static int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
|
|
||||||
struct wireless_dev *wdev,
|
|
||||||
u64 cookie)
|
|
||||||
{
|
|
||||||
struct ieee80211_local *local = wiphy_priv(wiphy);
|
|
||||||
|
|
||||||
return ieee80211_cancel_roc(local, cookie, true);
|
|
||||||
}
|
|
||||||
|
|
||||||
static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
|
static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,
|
||||||
struct wireless_dev *wdev,
|
struct wireless_dev *wdev,
|
||||||
u16 frame_type, bool reg)
|
u16 frame_type, bool reg)
|
||||||
|
|
|
||||||
|
|
@ -1483,6 +1483,11 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
|
||||||
void ieee80211_configure_filter(struct ieee80211_local *local);
|
void ieee80211_configure_filter(struct ieee80211_local *local);
|
||||||
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
|
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
|
||||||
|
|
||||||
|
u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
|
||||||
|
struct sk_buff *ieee80211_make_ack_skb(struct ieee80211_local *local,
|
||||||
|
struct sk_buff *skb, u64 *cookie,
|
||||||
|
gfp_t gfp);
|
||||||
|
|
||||||
/* STA code */
|
/* STA code */
|
||||||
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
|
void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
|
||||||
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
|
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
|
||||||
|
|
@ -1577,16 +1582,22 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
|
||||||
void ieee80211_sched_scan_end(struct ieee80211_local *local);
|
void ieee80211_sched_scan_end(struct ieee80211_local *local);
|
||||||
void ieee80211_sched_scan_stopped_work(struct work_struct *work);
|
void ieee80211_sched_scan_stopped_work(struct work_struct *work);
|
||||||
|
|
||||||
/* off-channel helpers */
|
/* off-channel/mgmt-tx */
|
||||||
void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
|
void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
|
||||||
void ieee80211_offchannel_return(struct ieee80211_local *local);
|
void ieee80211_offchannel_return(struct ieee80211_local *local);
|
||||||
void ieee80211_roc_setup(struct ieee80211_local *local);
|
void ieee80211_roc_setup(struct ieee80211_local *local);
|
||||||
void ieee80211_start_next_roc(struct ieee80211_local *local);
|
void ieee80211_start_next_roc(struct ieee80211_local *local);
|
||||||
void ieee80211_roc_purge(struct ieee80211_local *local,
|
void ieee80211_roc_purge(struct ieee80211_local *local,
|
||||||
struct ieee80211_sub_if_data *sdata);
|
struct ieee80211_sub_if_data *sdata);
|
||||||
void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free);
|
int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
|
||||||
void ieee80211_sw_roc_work(struct work_struct *work);
|
struct ieee80211_channel *chan,
|
||||||
void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc);
|
unsigned int duration, u64 *cookie);
|
||||||
|
int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
|
||||||
|
struct wireless_dev *wdev, u64 cookie);
|
||||||
|
int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
|
||||||
|
struct cfg80211_mgmt_tx_params *params, u64 *cookie);
|
||||||
|
int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
|
||||||
|
struct wireless_dev *wdev, u64 cookie);
|
||||||
|
|
||||||
/* channel switch handling */
|
/* channel switch handling */
|
||||||
void ieee80211_csa_finalize_work(struct work_struct *work);
|
void ieee80211_csa_finalize_work(struct work_struct *work);
|
||||||
|
|
|
||||||
|
|
@ -187,7 +187,7 @@ void ieee80211_offchannel_return(struct ieee80211_local *local)
|
||||||
false);
|
false);
|
||||||
}
|
}
|
||||||
|
|
||||||
void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc)
|
static void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc)
|
||||||
{
|
{
|
||||||
if (roc->notified)
|
if (roc->notified)
|
||||||
return;
|
return;
|
||||||
|
|
@ -299,7 +299,8 @@ void ieee80211_start_next_roc(struct ieee80211_local *local)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free)
|
static void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc,
|
||||||
|
bool free)
|
||||||
{
|
{
|
||||||
struct ieee80211_roc_work *dep, *tmp;
|
struct ieee80211_roc_work *dep, *tmp;
|
||||||
|
|
||||||
|
|
@ -328,7 +329,7 @@ void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc, bool free)
|
||||||
roc->to_be_freed = true;
|
roc->to_be_freed = true;
|
||||||
}
|
}
|
||||||
|
|
||||||
void ieee80211_sw_roc_work(struct work_struct *work)
|
static void ieee80211_sw_roc_work(struct work_struct *work)
|
||||||
{
|
{
|
||||||
struct ieee80211_roc_work *roc =
|
struct ieee80211_roc_work *roc =
|
||||||
container_of(work, struct ieee80211_roc_work, work.work);
|
container_of(work, struct ieee80211_roc_work, work.work);
|
||||||
|
|
@ -455,6 +456,473 @@ void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw)
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired);
|
EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired);
|
||||||
|
|
||||||
|
static bool ieee80211_coalesce_started_roc(struct ieee80211_local *local,
|
||||||
|
struct ieee80211_roc_work *new_roc,
|
||||||
|
struct ieee80211_roc_work *cur_roc)
|
||||||
|
{
|
||||||
|
unsigned long now = jiffies;
|
||||||
|
unsigned long remaining = cur_roc->hw_start_time +
|
||||||
|
msecs_to_jiffies(cur_roc->duration) -
|
||||||
|
now;
|
||||||
|
|
||||||
|
if (WARN_ON(!cur_roc->started || !cur_roc->hw_begun))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
/* if it doesn't fit entirely, schedule a new one */
|
||||||
|
if (new_roc->duration > jiffies_to_msecs(remaining))
|
||||||
|
return false;
|
||||||
|
|
||||||
|
ieee80211_handle_roc_started(new_roc);
|
||||||
|
|
||||||
|
/* add to dependents so we send the expired event properly */
|
||||||
|
list_add_tail(&new_roc->list, &cur_roc->dependents);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ieee80211_start_roc_work(struct ieee80211_local *local,
|
||||||
|
struct ieee80211_sub_if_data *sdata,
|
||||||
|
struct ieee80211_channel *channel,
|
||||||
|
unsigned int duration, u64 *cookie,
|
||||||
|
struct sk_buff *txskb,
|
||||||
|
enum ieee80211_roc_type type)
|
||||||
|
{
|
||||||
|
struct ieee80211_roc_work *roc, *tmp;
|
||||||
|
bool queued = false;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
lockdep_assert_held(&local->mtx);
|
||||||
|
|
||||||
|
if (local->use_chanctx && !local->ops->remain_on_channel)
|
||||||
|
return -EOPNOTSUPP;
|
||||||
|
|
||||||
|
roc = kzalloc(sizeof(*roc), GFP_KERNEL);
|
||||||
|
if (!roc)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If the duration is zero, then the driver
|
||||||
|
* wouldn't actually do anything. Set it to
|
||||||
|
* 10 for now.
|
||||||
|
*
|
||||||
|
* TODO: cancel the off-channel operation
|
||||||
|
* when we get the SKB's TX status and
|
||||||
|
* the wait time was zero before.
|
||||||
|
*/
|
||||||
|
if (!duration)
|
||||||
|
duration = 10;
|
||||||
|
|
||||||
|
roc->chan = channel;
|
||||||
|
roc->duration = duration;
|
||||||
|
roc->req_duration = duration;
|
||||||
|
roc->frame = txskb;
|
||||||
|
roc->type = type;
|
||||||
|
roc->sdata = sdata;
|
||||||
|
INIT_DELAYED_WORK(&roc->work, ieee80211_sw_roc_work);
|
||||||
|
INIT_LIST_HEAD(&roc->dependents);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* cookie is either the roc cookie (for normal roc)
|
||||||
|
* or the SKB (for mgmt TX)
|
||||||
|
*/
|
||||||
|
if (!txskb) {
|
||||||
|
roc->cookie = ieee80211_mgmt_tx_cookie(local);
|
||||||
|
*cookie = roc->cookie;
|
||||||
|
} else {
|
||||||
|
roc->mgmt_tx_cookie = *cookie;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* if there's one pending or we're scanning, queue this one */
|
||||||
|
if (!list_empty(&local->roc_list) ||
|
||||||
|
local->scanning || ieee80211_is_radar_required(local))
|
||||||
|
goto out_check_combine;
|
||||||
|
|
||||||
|
/* if not HW assist, just queue & schedule work */
|
||||||
|
if (!local->ops->remain_on_channel) {
|
||||||
|
ieee80211_queue_delayed_work(&local->hw, &roc->work, 0);
|
||||||
|
goto out_queue;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* otherwise actually kick it off here (for error handling) */
|
||||||
|
|
||||||
|
ret = drv_remain_on_channel(local, sdata, channel, duration, type);
|
||||||
|
if (ret) {
|
||||||
|
kfree(roc);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
roc->started = true;
|
||||||
|
goto out_queue;
|
||||||
|
|
||||||
|
out_check_combine:
|
||||||
|
list_for_each_entry(tmp, &local->roc_list, list) {
|
||||||
|
if (tmp->chan != channel || tmp->sdata != sdata)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Extend this ROC if possible:
|
||||||
|
*
|
||||||
|
* If it hasn't started yet, just increase the duration
|
||||||
|
* and add the new one to the list of dependents.
|
||||||
|
* If the type of the new ROC has higher priority, modify the
|
||||||
|
* type of the previous one to match that of the new one.
|
||||||
|
*/
|
||||||
|
if (!tmp->started) {
|
||||||
|
list_add_tail(&roc->list, &tmp->dependents);
|
||||||
|
tmp->duration = max(tmp->duration, roc->duration);
|
||||||
|
tmp->type = max(tmp->type, roc->type);
|
||||||
|
queued = true;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* If it has already started, it's more difficult ... */
|
||||||
|
if (local->ops->remain_on_channel) {
|
||||||
|
/*
|
||||||
|
* In the offloaded ROC case, if it hasn't begun, add
|
||||||
|
* this new one to the dependent list to be handled
|
||||||
|
* when the master one begins. If it has begun,
|
||||||
|
* check if it fits entirely within the existing one,
|
||||||
|
* in which case it will just be dependent as well.
|
||||||
|
* Otherwise, schedule it by itself.
|
||||||
|
*/
|
||||||
|
if (!tmp->hw_begun) {
|
||||||
|
list_add_tail(&roc->list, &tmp->dependents);
|
||||||
|
queued = true;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (ieee80211_coalesce_started_roc(local, roc, tmp))
|
||||||
|
queued = true;
|
||||||
|
} else if (del_timer_sync(&tmp->work.timer)) {
|
||||||
|
unsigned long new_end;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* In the software ROC case, cancel the timer, if
|
||||||
|
* that fails then the finish work is already
|
||||||
|
* queued/pending and thus we queue the new ROC
|
||||||
|
* normally, if that succeeds then we can extend
|
||||||
|
* the timer duration and TX the frame (if any.)
|
||||||
|
*/
|
||||||
|
|
||||||
|
list_add_tail(&roc->list, &tmp->dependents);
|
||||||
|
queued = true;
|
||||||
|
|
||||||
|
new_end = jiffies + msecs_to_jiffies(roc->duration);
|
||||||
|
|
||||||
|
/* ok, it was started & we canceled timer */
|
||||||
|
if (time_after(new_end, tmp->work.timer.expires))
|
||||||
|
mod_timer(&tmp->work.timer, new_end);
|
||||||
|
else
|
||||||
|
add_timer(&tmp->work.timer);
|
||||||
|
|
||||||
|
ieee80211_handle_roc_started(roc);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
out_queue:
|
||||||
|
if (!queued)
|
||||||
|
list_add_tail(&roc->list, &local->roc_list);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
|
||||||
|
struct ieee80211_channel *chan,
|
||||||
|
unsigned int duration, u64 *cookie)
|
||||||
|
{
|
||||||
|
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
|
||||||
|
struct ieee80211_local *local = sdata->local;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
mutex_lock(&local->mtx);
|
||||||
|
ret = ieee80211_start_roc_work(local, sdata, chan,
|
||||||
|
duration, cookie, NULL,
|
||||||
|
IEEE80211_ROC_TYPE_NORMAL);
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ieee80211_cancel_roc(struct ieee80211_local *local,
|
||||||
|
u64 cookie, bool mgmt_tx)
|
||||||
|
{
|
||||||
|
struct ieee80211_roc_work *roc, *tmp, *found = NULL;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
mutex_lock(&local->mtx);
|
||||||
|
list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
|
||||||
|
struct ieee80211_roc_work *dep, *tmp2;
|
||||||
|
|
||||||
|
list_for_each_entry_safe(dep, tmp2, &roc->dependents, list) {
|
||||||
|
if (!mgmt_tx && dep->cookie != cookie)
|
||||||
|
continue;
|
||||||
|
else if (mgmt_tx && dep->mgmt_tx_cookie != cookie)
|
||||||
|
continue;
|
||||||
|
/* found dependent item -- just remove it */
|
||||||
|
list_del(&dep->list);
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
|
||||||
|
ieee80211_roc_notify_destroy(dep, true);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!mgmt_tx && roc->cookie != cookie)
|
||||||
|
continue;
|
||||||
|
else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
found = roc;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!found) {
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
return -ENOENT;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* We found the item to cancel, so do that. Note that it
|
||||||
|
* may have dependents, which we also cancel (and send
|
||||||
|
* the expired signal for.) Not doing so would be quite
|
||||||
|
* tricky here, but we may need to fix it later.
|
||||||
|
*/
|
||||||
|
|
||||||
|
if (local->ops->remain_on_channel) {
|
||||||
|
if (found->started) {
|
||||||
|
ret = drv_cancel_remain_on_channel(local);
|
||||||
|
if (WARN_ON_ONCE(ret)) {
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
list_del(&found->list);
|
||||||
|
|
||||||
|
if (found->started)
|
||||||
|
ieee80211_start_next_roc(local);
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
|
||||||
|
ieee80211_roc_notify_destroy(found, true);
|
||||||
|
} else {
|
||||||
|
/* work may be pending so use it all the time */
|
||||||
|
found->abort = true;
|
||||||
|
ieee80211_queue_delayed_work(&local->hw, &found->work, 0);
|
||||||
|
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
|
||||||
|
/* work will clean up etc */
|
||||||
|
flush_delayed_work(&found->work);
|
||||||
|
WARN_ON(!found->to_be_freed);
|
||||||
|
kfree(found);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
|
||||||
|
struct wireless_dev *wdev, u64 cookie)
|
||||||
|
{
|
||||||
|
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
|
||||||
|
struct ieee80211_local *local = sdata->local;
|
||||||
|
|
||||||
|
return ieee80211_cancel_roc(local, cookie, false);
|
||||||
|
}
|
||||||
|
|
||||||
|
int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
|
||||||
|
struct cfg80211_mgmt_tx_params *params, u64 *cookie)
|
||||||
|
{
|
||||||
|
struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
|
||||||
|
struct ieee80211_local *local = sdata->local;
|
||||||
|
struct sk_buff *skb, *ack_skb;
|
||||||
|
struct sta_info *sta;
|
||||||
|
const struct ieee80211_mgmt *mgmt = (void *)params->buf;
|
||||||
|
bool need_offchan = false;
|
||||||
|
u32 flags;
|
||||||
|
int ret;
|
||||||
|
u8 *data;
|
||||||
|
|
||||||
|
if (params->dont_wait_for_ack)
|
||||||
|
flags = IEEE80211_TX_CTL_NO_ACK;
|
||||||
|
else
|
||||||
|
flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
|
||||||
|
IEEE80211_TX_CTL_REQ_TX_STATUS;
|
||||||
|
|
||||||
|
if (params->no_cck)
|
||||||
|
flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
|
||||||
|
|
||||||
|
switch (sdata->vif.type) {
|
||||||
|
case NL80211_IFTYPE_ADHOC:
|
||||||
|
if (!sdata->vif.bss_conf.ibss_joined)
|
||||||
|
need_offchan = true;
|
||||||
|
/* fall through */
|
||||||
|
#ifdef CONFIG_MAC80211_MESH
|
||||||
|
case NL80211_IFTYPE_MESH_POINT:
|
||||||
|
if (ieee80211_vif_is_mesh(&sdata->vif) &&
|
||||||
|
!sdata->u.mesh.mesh_id_len)
|
||||||
|
need_offchan = true;
|
||||||
|
/* fall through */
|
||||||
|
#endif
|
||||||
|
case NL80211_IFTYPE_AP:
|
||||||
|
case NL80211_IFTYPE_AP_VLAN:
|
||||||
|
case NL80211_IFTYPE_P2P_GO:
|
||||||
|
if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
|
||||||
|
!ieee80211_vif_is_mesh(&sdata->vif) &&
|
||||||
|
!rcu_access_pointer(sdata->bss->beacon))
|
||||||
|
need_offchan = true;
|
||||||
|
if (!ieee80211_is_action(mgmt->frame_control) ||
|
||||||
|
mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
|
||||||
|
mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
|
||||||
|
mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
|
||||||
|
break;
|
||||||
|
rcu_read_lock();
|
||||||
|
sta = sta_info_get(sdata, mgmt->da);
|
||||||
|
rcu_read_unlock();
|
||||||
|
if (!sta)
|
||||||
|
return -ENOLINK;
|
||||||
|
break;
|
||||||
|
case NL80211_IFTYPE_STATION:
|
||||||
|
case NL80211_IFTYPE_P2P_CLIENT:
|
||||||
|
sdata_lock(sdata);
|
||||||
|
if (!sdata->u.mgd.associated ||
|
||||||
|
(params->offchan && params->wait &&
|
||||||
|
local->ops->remain_on_channel &&
|
||||||
|
memcmp(sdata->u.mgd.associated->bssid,
|
||||||
|
mgmt->bssid, ETH_ALEN)))
|
||||||
|
need_offchan = true;
|
||||||
|
sdata_unlock(sdata);
|
||||||
|
break;
|
||||||
|
case NL80211_IFTYPE_P2P_DEVICE:
|
||||||
|
need_offchan = true;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return -EOPNOTSUPP;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* configurations requiring offchan cannot work if no channel has been
|
||||||
|
* specified
|
||||||
|
*/
|
||||||
|
if (need_offchan && !params->chan)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
mutex_lock(&local->mtx);
|
||||||
|
|
||||||
|
/* Check if the operating channel is the requested channel */
|
||||||
|
if (!need_offchan) {
|
||||||
|
struct ieee80211_chanctx_conf *chanctx_conf;
|
||||||
|
|
||||||
|
rcu_read_lock();
|
||||||
|
chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
|
||||||
|
|
||||||
|
if (chanctx_conf) {
|
||||||
|
need_offchan = params->chan &&
|
||||||
|
(params->chan !=
|
||||||
|
chanctx_conf->def.chan);
|
||||||
|
} else if (!params->chan) {
|
||||||
|
ret = -EINVAL;
|
||||||
|
rcu_read_unlock();
|
||||||
|
goto out_unlock;
|
||||||
|
} else {
|
||||||
|
need_offchan = true;
|
||||||
|
}
|
||||||
|
rcu_read_unlock();
|
||||||
|
}
|
||||||
|
|
||||||
|
if (need_offchan && !params->offchan) {
|
||||||
|
ret = -EBUSY;
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
|
||||||
|
skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
|
||||||
|
if (!skb) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
||||||
|
|
||||||
|
data = skb_put(skb, params->len);
|
||||||
|
memcpy(data, params->buf, params->len);
|
||||||
|
|
||||||
|
/* Update CSA counters */
|
||||||
|
if (sdata->vif.csa_active &&
|
||||||
|
(sdata->vif.type == NL80211_IFTYPE_AP ||
|
||||||
|
sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
|
||||||
|
sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
|
||||||
|
params->n_csa_offsets) {
|
||||||
|
int i;
|
||||||
|
struct beacon_data *beacon = NULL;
|
||||||
|
|
||||||
|
rcu_read_lock();
|
||||||
|
|
||||||
|
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
||||||
|
beacon = rcu_dereference(sdata->u.ap.beacon);
|
||||||
|
else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
|
||||||
|
beacon = rcu_dereference(sdata->u.ibss.presp);
|
||||||
|
else if (ieee80211_vif_is_mesh(&sdata->vif))
|
||||||
|
beacon = rcu_dereference(sdata->u.mesh.beacon);
|
||||||
|
|
||||||
|
if (beacon)
|
||||||
|
for (i = 0; i < params->n_csa_offsets; i++)
|
||||||
|
data[params->csa_offsets[i]] =
|
||||||
|
beacon->csa_current_counter;
|
||||||
|
|
||||||
|
rcu_read_unlock();
|
||||||
|
}
|
||||||
|
|
||||||
|
IEEE80211_SKB_CB(skb)->flags = flags;
|
||||||
|
|
||||||
|
skb->dev = sdata->dev;
|
||||||
|
|
||||||
|
if (!params->dont_wait_for_ack) {
|
||||||
|
/* make a copy to preserve the frame contents
|
||||||
|
* in case of encryption.
|
||||||
|
*/
|
||||||
|
ack_skb = ieee80211_make_ack_skb(local, skb, cookie,
|
||||||
|
GFP_KERNEL);
|
||||||
|
if (IS_ERR(ack_skb)) {
|
||||||
|
ret = PTR_ERR(ack_skb);
|
||||||
|
kfree_skb(skb);
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
/* Assign a dummy non-zero cookie, it's not sent to
|
||||||
|
* userspace in this case but we rely on its value
|
||||||
|
* internally in the need_offchan case to distinguish
|
||||||
|
* mgmt-tx from remain-on-channel.
|
||||||
|
*/
|
||||||
|
*cookie = 0xffffffff;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!need_offchan) {
|
||||||
|
ieee80211_tx_skb(sdata, skb);
|
||||||
|
ret = 0;
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
|
||||||
|
IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
|
||||||
|
IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
|
||||||
|
if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
|
||||||
|
IEEE80211_SKB_CB(skb)->hw_queue =
|
||||||
|
local->hw.offchannel_tx_hw_queue;
|
||||||
|
|
||||||
|
/* This will handle all kinds of coalescing and immediate TX */
|
||||||
|
ret = ieee80211_start_roc_work(local, sdata, params->chan,
|
||||||
|
params->wait, cookie, skb,
|
||||||
|
IEEE80211_ROC_TYPE_MGMT_TX);
|
||||||
|
if (ret)
|
||||||
|
ieee80211_free_txskb(&local->hw, skb);
|
||||||
|
out_unlock:
|
||||||
|
mutex_unlock(&local->mtx);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
|
||||||
|
struct wireless_dev *wdev, u64 cookie)
|
||||||
|
{
|
||||||
|
struct ieee80211_local *local = wiphy_priv(wiphy);
|
||||||
|
|
||||||
|
return ieee80211_cancel_roc(local, cookie, true);
|
||||||
|
}
|
||||||
|
|
||||||
void ieee80211_roc_setup(struct ieee80211_local *local)
|
void ieee80211_roc_setup(struct ieee80211_local *local)
|
||||||
{
|
{
|
||||||
INIT_WORK(&local->hw_roc_start, ieee80211_hw_roc_start);
|
INIT_WORK(&local->hw_roc_start, ieee80211_hw_roc_start);
|
||||||
|
|
|
||||||
Загрузка…
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