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-rw-r--r--net/mac80211/work.c170
1 files changed, 135 insertions, 35 deletions
diff --git a/net/mac80211/work.c b/net/mac80211/work.c
index ae344d1ba05..d2e7f0e8667 100644
--- a/net/mac80211/work.c
+++ b/net/mac80211/work.c
@@ -30,7 +30,6 @@
#define IEEE80211_AUTH_MAX_TRIES 3
#define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
#define IEEE80211_ASSOC_MAX_TRIES 3
-#define IEEE80211_MAX_PROBE_TRIES 5
enum work_action {
WORK_ACT_MISMATCH,
@@ -66,17 +65,9 @@ static void run_again(struct ieee80211_local *local,
mod_timer(&local->work_timer, timeout);
}
-static void work_free_rcu(struct rcu_head *head)
-{
- struct ieee80211_work *wk =
- container_of(head, struct ieee80211_work, rcu_head);
-
- kfree(wk);
-}
-
void free_work(struct ieee80211_work *wk)
{
- call_rcu(&wk->rcu_head, work_free_rcu);
+ kfree_rcu(wk, rcu_head);
}
static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
@@ -126,12 +117,6 @@ static void ieee80211_add_ht_ie(struct sk_buff *skb, const u8 *ht_info_ie,
/* determine capability flags */
- if (ieee80211_disable_40mhz_24ghz &&
- sband->band == IEEE80211_BAND_2GHZ) {
- cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
- cap &= ~IEEE80211_HT_CAP_SGI_40;
- }
-
switch (ht_info->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
@@ -205,9 +190,8 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb;
struct ieee80211_mgmt *mgmt;
u8 *pos, qos_info;
- const u8 *ies;
size_t offset = 0, noffset;
- int i, len, count, rates_len, supp_rates_len;
+ int i, count, rates_len, supp_rates_len;
u16 capab;
struct ieee80211_supported_band *sband;
u32 rates = 0;
@@ -292,7 +276,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
}
/* SSID */
- ies = pos = skb_put(skb, 2 + wk->assoc.ssid_len);
+ pos = skb_put(skb, 2 + wk->assoc.ssid_len);
*pos++ = WLAN_EID_SSID;
*pos++ = wk->assoc.ssid_len;
memcpy(pos, wk->assoc.ssid, wk->assoc.ssid_len);
@@ -302,7 +286,6 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
if (supp_rates_len > 8)
supp_rates_len = 8;
- len = sband->n_bitrates;
pos = skb_put(skb, supp_rates_len + 2);
*pos++ = WLAN_EID_SUPP_RATES;
*pos++ = supp_rates_len;
@@ -458,8 +441,9 @@ ieee80211_direct_probe(struct ieee80211_work *wk)
return WORK_ACT_TIMEOUT;
}
- printk(KERN_DEBUG "%s: direct probe to %pM (try %d)\n",
- sdata->name, wk->filter_ta, wk->probe_auth.tries);
+ printk(KERN_DEBUG "%s: direct probe to %pM (try %d/%i)\n",
+ sdata->name, wk->filter_ta, wk->probe_auth.tries,
+ IEEE80211_AUTH_MAX_TRIES);
/*
* Direct probe is sent to broadcast address as some APs
@@ -561,6 +545,25 @@ ieee80211_remain_on_channel_timeout(struct ieee80211_work *wk)
}
static enum work_action __must_check
+ieee80211_offchannel_tx(struct ieee80211_work *wk)
+{
+ if (!wk->started) {
+ wk->timeout = jiffies + msecs_to_jiffies(wk->offchan_tx.wait);
+
+ /*
+ * After this, offchan_tx.frame remains but now is no
+ * longer a valid pointer -- we still need it as the
+ * cookie for canceling this work.
+ */
+ ieee80211_tx_skb(wk->sdata, wk->offchan_tx.frame);
+
+ return WORK_ACT_NONE;
+ }
+
+ return WORK_ACT_TIMEOUT;
+}
+
+static enum work_action __must_check
ieee80211_assoc_beacon_wait(struct ieee80211_work *wk)
{
if (wk->started)
@@ -854,6 +857,44 @@ static void ieee80211_work_rx_queued_mgmt(struct ieee80211_local *local,
kfree_skb(skb);
}
+static bool ieee80211_work_ct_coexists(enum nl80211_channel_type wk_ct,
+ enum nl80211_channel_type oper_ct)
+{
+ switch (wk_ct) {
+ case NL80211_CHAN_NO_HT:
+ return true;
+ case NL80211_CHAN_HT20:
+ if (oper_ct != NL80211_CHAN_NO_HT)
+ return true;
+ return false;
+ case NL80211_CHAN_HT40MINUS:
+ case NL80211_CHAN_HT40PLUS:
+ return (wk_ct == oper_ct);
+ }
+ WARN_ON(1); /* shouldn't get here */
+ return false;
+}
+
+static enum nl80211_channel_type
+ieee80211_calc_ct(enum nl80211_channel_type wk_ct,
+ enum nl80211_channel_type oper_ct)
+{
+ switch (wk_ct) {
+ case NL80211_CHAN_NO_HT:
+ return oper_ct;
+ case NL80211_CHAN_HT20:
+ if (oper_ct != NL80211_CHAN_NO_HT)
+ return oper_ct;
+ return wk_ct;
+ case NL80211_CHAN_HT40MINUS:
+ case NL80211_CHAN_HT40PLUS:
+ return wk_ct;
+ }
+ WARN_ON(1); /* shouldn't get here */
+ return wk_ct;
+}
+
+
static void ieee80211_work_timer(unsigned long data)
{
struct ieee80211_local *local = (void *) data;
@@ -904,18 +945,52 @@ static void ieee80211_work_work(struct work_struct *work)
}
if (!started && !local->tmp_channel) {
+ bool on_oper_chan;
+ bool tmp_chan_changed = false;
+ bool on_oper_chan2;
+ enum nl80211_channel_type wk_ct;
+ on_oper_chan = ieee80211_cfg_on_oper_channel(local);
+
+ /* Work with existing channel type if possible. */
+ wk_ct = wk->chan_type;
+ if (wk->chan == local->hw.conf.channel)
+ wk_ct = ieee80211_calc_ct(wk->chan_type,
+ local->hw.conf.channel_type);
+
+ if (local->tmp_channel)
+ if ((local->tmp_channel != wk->chan) ||
+ (local->tmp_channel_type != wk_ct))
+ tmp_chan_changed = true;
+
+ local->tmp_channel = wk->chan;
+ local->tmp_channel_type = wk_ct;
/*
- * TODO: could optimize this by leaving the
- * station vifs in awake mode if they
- * happen to be on the same channel as
- * the requested channel
+ * Leave the station vifs in awake mode if they
+ * happen to be on the same channel as
+ * the requested channel.
*/
- ieee80211_offchannel_stop_beaconing(local);
- ieee80211_offchannel_stop_station(local);
+ on_oper_chan2 = ieee80211_cfg_on_oper_channel(local);
+ if (on_oper_chan != on_oper_chan2) {
+ if (on_oper_chan2) {
+ /* going off oper channel, PS too */
+ ieee80211_offchannel_stop_vifs(local,
+ true);
+ ieee80211_hw_config(local, 0);
+ } else {
+ /* going on channel, but leave PS
+ * off-channel. */
+ ieee80211_hw_config(local, 0);
+ ieee80211_offchannel_return(local,
+ true,
+ false);
+ }
+ } else if (tmp_chan_changed)
+ /* Still off-channel, but on some other
+ * channel, so update hardware.
+ * PS should already be off-channel.
+ */
+ ieee80211_hw_config(local, 0);
- local->tmp_channel = wk->chan;
- local->tmp_channel_type = wk->chan_type;
- ieee80211_hw_config(local, 0);
started = true;
wk->timeout = jiffies;
}
@@ -955,6 +1030,9 @@ static void ieee80211_work_work(struct work_struct *work)
case IEEE80211_WORK_REMAIN_ON_CHANNEL:
rma = ieee80211_remain_on_channel_timeout(wk);
break;
+ case IEEE80211_WORK_OFFCHANNEL_TX:
+ rma = ieee80211_offchannel_tx(wk);
+ break;
case IEEE80211_WORK_ASSOC_BEACON_WAIT:
rma = ieee80211_assoc_beacon_wait(wk);
break;
@@ -982,15 +1060,34 @@ static void ieee80211_work_work(struct work_struct *work)
continue;
if (wk->chan != local->tmp_channel)
continue;
- if (wk->chan_type != local->tmp_channel_type)
+ if (ieee80211_work_ct_coexists(wk->chan_type,
+ local->tmp_channel_type))
continue;
remain_off_channel = true;
}
if (!remain_off_channel && local->tmp_channel) {
+ bool on_oper_chan = ieee80211_cfg_on_oper_channel(local);
local->tmp_channel = NULL;
- ieee80211_hw_config(local, 0);
- ieee80211_offchannel_return(local, true);
+ /* If tmp_channel wasn't operating channel, then
+ * we need to go back on-channel.
+ * NOTE: If we can ever be here while scannning,
+ * or if the hw_config() channel config logic changes,
+ * then we may need to do a more thorough check to see if
+ * we still need to do a hardware config. Currently,
+ * we cannot be here while scanning, however.
+ */
+ if (ieee80211_cfg_on_oper_channel(local) && !on_oper_chan)
+ ieee80211_hw_config(local, 0);
+
+ /* At the least, we need to disable offchannel_ps,
+ * so just go ahead and run the entire offchannel
+ * return logic here. We *could* skip enabling
+ * beaconing if we were already on-oper-channel
+ * as a future optimization.
+ */
+ ieee80211_offchannel_return(local, true, true);
+
/* give connection some time to breathe */
run_again(local, jiffies + HZ/2);
}
@@ -1051,11 +1148,13 @@ void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_local *local = sdata->local;
struct ieee80211_work *wk;
+ bool cleanup = false;
mutex_lock(&local->mtx);
list_for_each_entry(wk, &local->work_list, list) {
if (wk->sdata != sdata)
continue;
+ cleanup = true;
wk->type = IEEE80211_WORK_ABORT;
wk->started = true;
wk->timeout = jiffies;
@@ -1063,7 +1162,8 @@ void ieee80211_work_purge(struct ieee80211_sub_if_data *sdata)
mutex_unlock(&local->mtx);
/* run cleanups etc. */
- ieee80211_work_work(&local->work_work);
+ if (cleanup)
+ ieee80211_work_work(&local->work_work);
mutex_lock(&local->mtx);
list_for_each_entry(wk, &local->work_list, list) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-16 09:56:06 +0000