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mac80211: refactor SKB queue processing a bit
This is a very long loop body, move it into its own function instead, keeping only the kcov and free outside in the loop body. Link: https://lore.kernel.org/r/20210517230754.6bc6cdd68570.I28a86ebdb19601ca1965c4dc654cc49fc1064efa@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
parent
0044cc177f
commit
07bd1c79c9
@ -1318,13 +1318,130 @@ static void ieee80211_if_setup_no_queue(struct net_device *dev)
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dev->priv_flags |= IFF_NO_QUEUE;
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}
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static void ieee80211_iface_process_skb(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_mgmt *mgmt = (void *)skb->data;
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if (ieee80211_is_action(mgmt->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_BACK) {
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struct sta_info *sta;
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int len = skb->len;
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta) {
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switch (mgmt->u.action.u.addba_req.action_code) {
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case WLAN_ACTION_ADDBA_REQ:
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ieee80211_process_addba_request(local, sta,
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mgmt, len);
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break;
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case WLAN_ACTION_ADDBA_RESP:
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ieee80211_process_addba_resp(local, sta,
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mgmt, len);
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break;
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case WLAN_ACTION_DELBA:
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ieee80211_process_delba(sdata, sta,
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mgmt, len);
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break;
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default:
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WARN_ON(1);
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break;
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}
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}
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mutex_unlock(&local->sta_mtx);
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} else if (ieee80211_is_action(mgmt->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_VHT) {
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switch (mgmt->u.action.u.vht_group_notif.action_code) {
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case WLAN_VHT_ACTION_OPMODE_NOTIF: {
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struct ieee80211_rx_status *status;
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enum nl80211_band band;
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struct sta_info *sta;
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u8 opmode;
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status = IEEE80211_SKB_RXCB(skb);
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band = status->band;
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opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta)
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ieee80211_vht_handle_opmode(sdata, sta, opmode,
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band);
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mutex_unlock(&local->sta_mtx);
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break;
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}
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case WLAN_VHT_ACTION_GROUPID_MGMT:
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ieee80211_process_mu_groups(sdata, mgmt);
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break;
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default:
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WARN_ON(1);
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break;
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}
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} else if (ieee80211_is_ext(mgmt->frame_control)) {
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if (sdata->vif.type == NL80211_IFTYPE_STATION)
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ieee80211_sta_rx_queued_ext(sdata, skb);
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else
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WARN_ON(1);
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} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
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struct ieee80211_hdr *hdr = (void *)mgmt;
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struct sta_info *sta;
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/*
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* So the frame isn't mgmt, but frame_control
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* is at the right place anyway, of course, so
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* the if statement is correct.
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*
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* Warn if we have other data frame types here,
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* they must not get here.
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*/
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WARN_ON(hdr->frame_control &
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cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
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WARN_ON(!(hdr->seq_ctrl &
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cpu_to_le16(IEEE80211_SCTL_FRAG)));
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/*
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* This was a fragment of a frame, received while
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* a block-ack session was active. That cannot be
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* right, so terminate the session.
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*/
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta) {
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u16 tid = ieee80211_get_tid(hdr);
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__ieee80211_stop_rx_ba_session(
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sta, tid, WLAN_BACK_RECIPIENT,
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WLAN_REASON_QSTA_REQUIRE_SETUP,
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true);
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}
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mutex_unlock(&local->sta_mtx);
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} else switch (sdata->vif.type) {
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case NL80211_IFTYPE_STATION:
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ieee80211_sta_rx_queued_mgmt(sdata, skb);
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break;
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case NL80211_IFTYPE_ADHOC:
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ieee80211_ibss_rx_queued_mgmt(sdata, skb);
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break;
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case NL80211_IFTYPE_MESH_POINT:
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if (!ieee80211_vif_is_mesh(&sdata->vif))
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break;
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ieee80211_mesh_rx_queued_mgmt(sdata, skb);
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break;
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default:
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WARN(1, "frame for unexpected interface type");
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break;
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}
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}
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static void ieee80211_iface_work(struct work_struct *work)
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{
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struct ieee80211_sub_if_data *sdata =
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container_of(work, struct ieee80211_sub_if_data, work);
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struct ieee80211_local *local = sdata->local;
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struct sk_buff *skb;
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struct sta_info *sta;
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if (!ieee80211_sdata_running(sdata))
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return;
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@ -1337,116 +1454,9 @@ static void ieee80211_iface_work(struct work_struct *work)
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/* first process frames */
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while ((skb = skb_dequeue(&sdata->skb_queue))) {
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struct ieee80211_mgmt *mgmt = (void *)skb->data;
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kcov_remote_start_common(skb_get_kcov_handle(skb));
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if (ieee80211_is_action(mgmt->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_BACK) {
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int len = skb->len;
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta) {
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switch (mgmt->u.action.u.addba_req.action_code) {
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case WLAN_ACTION_ADDBA_REQ:
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ieee80211_process_addba_request(
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local, sta, mgmt, len);
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break;
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case WLAN_ACTION_ADDBA_RESP:
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ieee80211_process_addba_resp(local, sta,
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mgmt, len);
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break;
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case WLAN_ACTION_DELBA:
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ieee80211_process_delba(sdata, sta,
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mgmt, len);
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break;
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default:
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WARN_ON(1);
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break;
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}
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}
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mutex_unlock(&local->sta_mtx);
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} else if (ieee80211_is_action(mgmt->frame_control) &&
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mgmt->u.action.category == WLAN_CATEGORY_VHT) {
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switch (mgmt->u.action.u.vht_group_notif.action_code) {
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case WLAN_VHT_ACTION_OPMODE_NOTIF: {
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struct ieee80211_rx_status *status;
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enum nl80211_band band;
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u8 opmode;
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status = IEEE80211_SKB_RXCB(skb);
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band = status->band;
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opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta)
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ieee80211_vht_handle_opmode(sdata, sta,
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opmode,
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band);
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mutex_unlock(&local->sta_mtx);
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break;
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}
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case WLAN_VHT_ACTION_GROUPID_MGMT:
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ieee80211_process_mu_groups(sdata, mgmt);
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break;
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default:
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WARN_ON(1);
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break;
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}
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} else if (ieee80211_is_ext(mgmt->frame_control)) {
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if (sdata->vif.type == NL80211_IFTYPE_STATION)
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ieee80211_sta_rx_queued_ext(sdata, skb);
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else
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WARN_ON(1);
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} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
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struct ieee80211_hdr *hdr = (void *)mgmt;
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/*
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* So the frame isn't mgmt, but frame_control
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* is at the right place anyway, of course, so
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* the if statement is correct.
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*
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* Warn if we have other data frame types here,
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* they must not get here.
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*/
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WARN_ON(hdr->frame_control &
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cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
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WARN_ON(!(hdr->seq_ctrl &
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cpu_to_le16(IEEE80211_SCTL_FRAG)));
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/*
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* This was a fragment of a frame, received while
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* a block-ack session was active. That cannot be
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* right, so terminate the session.
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*/
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mutex_lock(&local->sta_mtx);
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sta = sta_info_get_bss(sdata, mgmt->sa);
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if (sta) {
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u16 tid = ieee80211_get_tid(hdr);
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__ieee80211_stop_rx_ba_session(
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sta, tid, WLAN_BACK_RECIPIENT,
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WLAN_REASON_QSTA_REQUIRE_SETUP,
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true);
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}
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mutex_unlock(&local->sta_mtx);
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} else switch (sdata->vif.type) {
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case NL80211_IFTYPE_STATION:
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ieee80211_sta_rx_queued_mgmt(sdata, skb);
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break;
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case NL80211_IFTYPE_ADHOC:
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ieee80211_ibss_rx_queued_mgmt(sdata, skb);
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break;
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case NL80211_IFTYPE_MESH_POINT:
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if (!ieee80211_vif_is_mesh(&sdata->vif))
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break;
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ieee80211_mesh_rx_queued_mgmt(sdata, skb);
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break;
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default:
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WARN(1, "frame for unexpected interface type");
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break;
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}
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ieee80211_iface_process_skb(local, sdata, skb);
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kfree_skb(skb);
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kcov_remote_stop();
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