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mac80211: refactor SKB queue processing a bit

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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 2021-05-17 23:07:55 +02:00
parent 0044cc177f
commit 07bd1c79c9
1 changed files with 119 additions and 109 deletions
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56
net/mac80211/iface.c
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@ -1318,30 +1318,15 @@ static void ieee80211_if_setup_no_queue(struct net_device *dev)
dev->priv_flags |= IFF_NO_QUEUE;
}
static void ieee80211_iface_work(struct work_struct *work)
static void ieee80211_iface_process_skb(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
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;
if (test_bit(SCAN_SW_SCANNING, &local->scanning))
return;
if (!ieee80211_can_run_worker(local))
return;
/* first process frames */
while ((skb = skb_dequeue(&sdata->skb_queue))) {
struct ieee80211_mgmt *mgmt = (void *)skb->data;
kcov_remote_start_common(skb_get_kcov_handle(skb));
if (ieee80211_is_action(mgmt->frame_control) &&
mgmt->u.action.category == WLAN_CATEGORY_BACK) {
struct sta_info *sta;
int len = skb->len;
mutex_lock(&local->sta_mtx);
@ -1349,8 +1334,8 @@ static void ieee80211_iface_work(struct work_struct *work)
if (sta) {
switch (mgmt->u.action.u.addba_req.action_code) {
case WLAN_ACTION_ADDBA_REQ:
ieee80211_process_addba_request(
local, sta, mgmt, len);
ieee80211_process_addba_request(local, sta,
mgmt, len);
break;
case WLAN_ACTION_ADDBA_RESP:
ieee80211_process_addba_resp(local, sta,
@ -1372,6 +1357,7 @@ static void ieee80211_iface_work(struct work_struct *work)
case WLAN_VHT_ACTION_OPMODE_NOTIF: {
struct ieee80211_rx_status *status;
enum nl80211_band band;
struct sta_info *sta;
u8 opmode;
status = IEEE80211_SKB_RXCB(skb);
@ -1382,8 +1368,7 @@ static void ieee80211_iface_work(struct work_struct *work)
sta = sta_info_get_bss(sdata, mgmt->sa);
if (sta)
ieee80211_vht_handle_opmode(sdata, sta,
opmode,
ieee80211_vht_handle_opmode(sdata, sta, opmode,
band);
mutex_unlock(&local->sta_mtx);
@ -1403,6 +1388,8 @@ static void ieee80211_iface_work(struct work_struct *work)
WARN_ON(1);
} else if (ieee80211_is_data_qos(mgmt->frame_control)) {
struct ieee80211_hdr *hdr = (void *)mgmt;
struct sta_info *sta;
/*
* So the frame isn't mgmt, but frame_control
* is at the right place anyway, of course, so
@ -1447,6 +1434,29 @@ static void ieee80211_iface_work(struct work_struct *work)
WARN(1, "frame for unexpected interface type");
break;
}
}
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;
if (!ieee80211_sdata_running(sdata))
return;
if (test_bit(SCAN_SW_SCANNING, &local->scanning))
return;
if (!ieee80211_can_run_worker(local))
return;
/* first process frames */
while ((skb = skb_dequeue(&sdata->skb_queue))) {
kcov_remote_start_common(skb_get_kcov_handle(skb));
ieee80211_iface_process_skb(local, sdata, skb);
kfree_skb(skb);
kcov_remote_stop();