Refactored ieee80211_iface_work_handle_pkt_type - if else if replaced by
switch case.
Added ieee80211_iface_work_handle_frame_control.
Moved the code that looks in skb->data (ieee80211_mgmt/ieee80211_hdr) at
frame_control member(field) from ieee80211_iface_work to the function.
Signed-off-by: Alex Briskin <br.shurik@xxxxxxxxx>
---
net/mac80211/iface.c | 165 ++++++++++++++++++++++++++++-----------------------
1 file changed, 90 insertions(+), 75 deletions(-)
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 0fc973a..c185801 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1207,13 +1207,16 @@ static int ieee80211_iface_work_handle_pkt_type(struct sk_buff *skb,
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
- if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
+ switch (skb->pkt_type) {
+ case IEEE80211_SDATA_QUEUE_AGG_START:
ra_tid = (void *)&skb->cb;
ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra, ra_tid->tid);
- } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
+ break;
+ case IEEE80211_SDATA_QUEUE_AGG_STOP:
ra_tid = (void *)&skb->cb;
ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra, ra_tid->tid);
- } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
+ break;
+ case IEEE80211_SDATA_QUEUE_RX_AGG_START:
rx_agg = (void *)&skb->cb;
mutex_lock(&local->sta_mtx);
sta = sta_info_get_bss(sdata, rx_agg->addr);
@@ -1223,7 +1226,8 @@ static int ieee80211_iface_work_handle_pkt_type(struct sk_buff *skb,
IEEE80211_MAX_AMPDU_BUF,
false, true);
mutex_unlock(&local->sta_mtx);
- } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
+ break;
+ case IEEE80211_SDATA_QUEUE_RX_AGG_STOP:
rx_agg = (void *)&skb->cb;
mutex_lock(&local->sta_mtx);
sta = sta_info_get_bss(sdata, rx_agg->addr);
@@ -1233,20 +1237,98 @@ static int ieee80211_iface_work_handle_pkt_type(struct sk_buff *skb,
WLAN_BACK_RECIPIENT, 0,
false);
mutex_unlock(&local->sta_mtx);
- } else {
+ break;
+ default:
return -EINVAL;
}
/*will return 0 if pkt_type found and handled */
return 0;
}
+static int ieee80211_iface_work_handle_frame_control(struct sk_buff *skb,
+ struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta;
+ struct ieee80211_mgmt *mgmt = (void *)skb->data;
+
+ if (ieee80211_is_action(mgmt->frame_control) &&
+ mgmt->u.action.category == WLAN_CATEGORY_BACK) {
+ int len = skb->len;
+
+ mutex_lock(&local->sta_mtx);
+ sta = sta_info_get_bss(sdata, mgmt->sa);
+ if (sta) {
+ switch (mgmt->u.action.u.addba_req.action_code) {
+ case WLAN_ACTION_ADDBA_REQ:
+ ieee80211_process_addba_request(local, sta,
+ mgmt, len);
+ break;
+ case WLAN_ACTION_ADDBA_RESP:
+ ieee80211_process_addba_resp(local, sta,
+ mgmt, len);
+ break;
+ case WLAN_ACTION_DELBA:
+ ieee80211_process_delba(sdata, sta, mgmt, len);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ }
+ mutex_unlock(&local->sta_mtx);
+ } else if (ieee80211_is_action(mgmt->frame_control) &&
+ mgmt->u.action.category == WLAN_CATEGORY_VHT) {
+ switch (mgmt->u.action.u.vht_group_notif.action_code) {
+ case WLAN_VHT_ACTION_GROUPID_MGMT:
+ ieee80211_process_mu_groups(sdata, mgmt);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+ } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
+ struct ieee80211_hdr *hdr = (void *)mgmt;
+ /*
+ * So the frame isn't mgmt, but frame_control
+ * is at the right place anyway, of course, so
+ * the if statement is correct.
+ *
+ * Warn if we have other data frame types here,
+ * they must not get here.
+ */
+ WARN_ON(hdr->frame_control &
+ cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
+ WARN_ON(!(hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)));
+ /*
+ * This was a fragment of a frame, received while
+ * a block-ack session was active. That cannot be
+ * right, so terminate the session.
+ */
+ mutex_lock(&local->sta_mtx);
+ sta = sta_info_get_bss(sdata, mgmt->sa);
+ if (sta) {
+ u16 tid = *ieee80211_get_qos_ctl(hdr) &
+ IEEE80211_QOS_CTL_TID_MASK;
+
+ __ieee80211_stop_rx_ba_session(sta, tid,
+ WLAN_BACK_RECIPIENT,
+ WLAN_REASON_QSTA_REQUIRE_SETUP,
+ true);
+ }
+ mutex_unlock(&local->sta_mtx);
+ } else {
+ return -EINVAL;
+ }
+ return 0;
+}
+
static void ieee80211_iface_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data, work);
struct ieee80211_local *local = sdata->local;
struct sk_buff *skb;
- struct sta_info *sta;
if (!ieee80211_sdata_running(sdata))
return;
@@ -1259,77 +1341,10 @@ static void ieee80211_iface_work(struct work_struct *work)
/* first process frames */
while ((skb = skb_dequeue(&sdata->skb_queue))) {
- struct ieee80211_mgmt *mgmt = (void *)skb->data;
-
if (!ieee80211_iface_work_handle_pkt_type(skb, sdata)) {
goto free_skb;
- } else if (ieee80211_is_action(mgmt->frame_control) &&
- mgmt->u.action.category == WLAN_CATEGORY_BACK) {
- int len = skb->len;
-
- mutex_lock(&local->sta_mtx);
- sta = sta_info_get_bss(sdata, mgmt->sa);
- if (sta) {
- switch (mgmt->u.action.u.addba_req.action_code) {
- case WLAN_ACTION_ADDBA_REQ:
- ieee80211_process_addba_request(
- local, sta, mgmt, len);
- break;
- case WLAN_ACTION_ADDBA_RESP:
- ieee80211_process_addba_resp(local, sta,
- mgmt, len);
- break;
- case WLAN_ACTION_DELBA:
- ieee80211_process_delba(sdata, sta,
- mgmt, len);
- break;
- default:
- WARN_ON(1);
- break;
- }
- }
- mutex_unlock(&local->sta_mtx);
- } else if (ieee80211_is_action(mgmt->frame_control) &&
- mgmt->u.action.category == WLAN_CATEGORY_VHT) {
- switch (mgmt->u.action.u.vht_group_notif.action_code) {
- case WLAN_VHT_ACTION_GROUPID_MGMT:
- ieee80211_process_mu_groups(sdata, mgmt);
- break;
- default:
- WARN_ON(1);
- break;
- }
- } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
- struct ieee80211_hdr *hdr = (void *)mgmt;
- /*
- * So the frame isn't mgmt, but frame_control
- * is at the right place anyway, of course, so
- * the if statement is correct.
- *
- * Warn if we have other data frame types here,
- * they must not get here.
- */
- WARN_ON(hdr->frame_control &
- cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
- WARN_ON(!(hdr->seq_ctrl &
- cpu_to_le16(IEEE80211_SCTL_FRAG)));
- /*
- * This was a fragment of a frame, received while
- * a block-ack session was active. That cannot be
- * right, so terminate the session.
- */
- mutex_lock(&local->sta_mtx);
- sta = sta_info_get_bss(sdata, mgmt->sa);
- if (sta) {
- u16 tid = *ieee80211_get_qos_ctl(hdr) &
- IEEE80211_QOS_CTL_TID_MASK;
-
- __ieee80211_stop_rx_ba_session(
- sta, tid, WLAN_BACK_RECIPIENT,
- WLAN_REASON_QSTA_REQUIRE_SETUP,
- true);
- }
- mutex_unlock(&local->sta_mtx);
+ } else if (!ieee80211_iface_work_handle_frame_control(skb, sdata)) {
+ goto free_skb;
} else switch (sdata->vif.type) {
case NL80211_IFTYPE_STATION:
ieee80211_sta_rx_queued_mgmt(sdata, skb);
--
2.7.4
--
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