mac80211: simplify idle handling

Now that we have channel contexts, idle is (pretty
much) equivalent to not having a channel context.
Change the code to use this relation so that there
no longer is a need for a lot of idle recalculate
calls everywhere.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index b5b5076..038f249 100644 (file)
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -91,6 +91,10 @@ ieee80211_new_chanctx(struct ieee80211_local *local,
 
        list_add_rcu(&ctx->list, &local->chanctx_list);
 
+       mutex_lock(&local->mtx);
+       ieee80211_recalc_idle(local);
+       mutex_unlock(&local->mtx);
+
        return ctx;
 }
 
@@ -110,6 +114,10 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local,
 
        list_del_rcu(&ctx->list);
        kfree_rcu(ctx, rcu_head);
+
+       mutex_lock(&local->mtx);
+       ieee80211_recalc_idle(local);
+       mutex_unlock(&local->mtx);
 }
 
 static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
@@ -128,6 +136,8 @@ static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
        ctx->refcount++;
 
        ieee80211_recalc_txpower(sdata);
+       sdata->vif.bss_conf.idle = false;
+       ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
 
        return 0;
 }
@@ -175,6 +185,9 @@ static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
        ctx->refcount--;
        rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
 
+       sdata->vif.bss_conf.idle = true;
+       ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
+
        drv_unassign_vif_chanctx(local, sdata, ctx);
 
        if (ctx->refcount > 0) {

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 055fa94..2db1f2b 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1108,10 +1108,6 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 
        mutex_unlock(&sdata->u.ibss.mtx);
 
-       mutex_lock(&sdata->local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&sdata->local->mtx);
-
        /*
         * 802.11n-2009 9.13.3.1: In an IBSS, the HT Protection field is
         * reserved, but an HT STA shall protect HT transmissions as though
@@ -1209,9 +1205,5 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata)
 
        mutex_unlock(&sdata->u.ibss.mtx);
 
-       mutex_lock(&local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&local->mtx);
-
        return 0;
 }

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index fafeb30..5635dfc 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -689,9 +689,6 @@ struct ieee80211_sub_if_data {
 
        char name[IFNAMSIZ];
 
-       /* to detect idle changes */
-       bool old_idle;
-
        /* Fragment table for host-based reassembly */
        struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
        unsigned int fragment_next;

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 3ece8eb..40ff030 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -78,8 +78,7 @@ void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
                ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
 }
 
-static u32 ieee80211_idle_off(struct ieee80211_local *local,
-                             const char *reason)
+static u32 ieee80211_idle_off(struct ieee80211_local *local)
 {
        if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
                return 0;
@@ -99,106 +98,45 @@ static u32 ieee80211_idle_on(struct ieee80211_local *local)
        return IEEE80211_CONF_CHANGE_IDLE;
 }
 
-static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
+void ieee80211_recalc_idle(struct ieee80211_local *local)
 {
-       struct ieee80211_sub_if_data *sdata;
-       int count = 0;
-       bool working = false, scanning = false;
+       bool working = false, scanning, active;
        unsigned int led_trig_start = 0, led_trig_stop = 0;
        struct ieee80211_roc_work *roc;
+       u32 change;
 
-#ifdef CONFIG_PROVE_LOCKING
-       WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
-               !lockdep_is_held(&local->iflist_mtx));
-#endif
        lockdep_assert_held(&local->mtx);
 
-       list_for_each_entry(sdata, &local->interfaces, list) {
-               if (!ieee80211_sdata_running(sdata)) {
-                       sdata->vif.bss_conf.idle = true;
-                       continue;
-               }
-
-               sdata->old_idle = sdata->vif.bss_conf.idle;
-
-               /* do not count disabled managed interfaces */
-               if (sdata->vif.type == NL80211_IFTYPE_STATION &&
-                   !sdata->u.mgd.associated &&
-                   !sdata->u.mgd.auth_data &&
-                   !sdata->u.mgd.assoc_data) {
-                       sdata->vif.bss_conf.idle = true;
-                       continue;
-               }
-               /* do not count unused IBSS interfaces */
-               if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
-                   !sdata->u.ibss.ssid_len) {
-                       sdata->vif.bss_conf.idle = true;
-                       continue;
-               }
-
-               if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
-                       continue;
-
-               /* count everything else */
-               sdata->vif.bss_conf.idle = false;
-               count++;
-       }
+       active = !list_empty(&local->chanctx_list);
 
        if (!local->ops->remain_on_channel) {
                list_for_each_entry(roc, &local->roc_list, list) {
                        working = true;
-                       roc->sdata->vif.bss_conf.idle = false;
+                       break;
                }
        }
 
        scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
                   test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
 
-       list_for_each_entry(sdata, &local->interfaces, list) {
-               if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
-                   sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
-                   sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
-                       continue;
-               if (sdata->old_idle == sdata->vif.bss_conf.idle)
-                       continue;
-               if (!ieee80211_sdata_running(sdata))
-                       continue;
-               ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
-       }
-
        if (working || scanning)
                led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
        else
                led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
 
-       if (count)
+       if (active)
                led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
        else
                led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
 
        ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
 
-       if (working)
-               return ieee80211_idle_off(local, "working");
-       if (scanning)
-               return ieee80211_idle_off(local, "scanning");
-       if (!count)
-               return ieee80211_idle_on(local);
+       if (working || scanning || active)
+               change = ieee80211_idle_off(local);
        else
-               return ieee80211_idle_off(local, "in use");
-
-       return 0;
-}
-
-void ieee80211_recalc_idle(struct ieee80211_local *local)
-{
-       u32 chg;
-
-       mutex_lock(&local->iflist_mtx);
-       chg = __ieee80211_recalc_idle(local);
-       mutex_unlock(&local->iflist_mtx);
-       if (chg)
-               ieee80211_hw_config(local, chg);
+               change = ieee80211_idle_on(local);
+       if (change)
+               ieee80211_hw_config(local, change);
 }
 
 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
@@ -692,10 +630,6 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
        if (sdata->flags & IEEE80211_SDATA_PROMISC)
                atomic_inc(&local->iff_promiscs);
 
-       mutex_lock(&local->mtx);
-       hw_reconf_flags |= __ieee80211_recalc_idle(local);
-       mutex_unlock(&local->mtx);
-
        if (coming_up)
                local->open_count++;
 
@@ -888,10 +822,6 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 
        sdata->bss = NULL;
 
-       mutex_lock(&local->mtx);
-       hw_reconf_flags |= __ieee80211_recalc_idle(local);
-       mutex_unlock(&local->mtx);
-
        ieee80211_recalc_ps(local, -1);
 
        if (local->open_count == 0) {

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 1e7662c..3bcf393 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1792,7 +1792,6 @@ EXPORT_SYMBOL(ieee80211_ap_probereq_get);
 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
 {
        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
-       struct ieee80211_local *local = sdata->local;
        u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
 
        mutex_lock(&ifmgd->mtx);
@@ -1812,10 +1811,6 @@ static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
         * but that's not a problem.
         */
        cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
-
-       mutex_lock(&local->mtx);
-       ieee80211_recalc_idle(local);
-       mutex_unlock(&local->mtx);
 }
 
 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
@@ -2048,10 +2043,6 @@ ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
 
        ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
 
-       mutex_lock(&sdata->local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&sdata->local->mtx);
-
        return RX_MGMT_CFG80211_DEAUTH;
 }
 
@@ -2079,10 +2070,6 @@ ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
 
        ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
 
-       mutex_lock(&sdata->local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&sdata->local->mtx);
-
        return RX_MGMT_CFG80211_DISASSOC;
 }
 
@@ -2839,7 +2826,6 @@ static void ieee80211_sta_timer(unsigned long data)
 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
                                          u8 *bssid, u8 reason, bool tx)
 {
-       struct ieee80211_local *local = sdata->local;
        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
        u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
 
@@ -2853,10 +2839,6 @@ static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
         */
        cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
 
-       mutex_lock(&local->mtx);
-       ieee80211_recalc_idle(local);
-       mutex_unlock(&local->mtx);
-
        mutex_lock(&ifmgd->mtx);
 }
 
@@ -3127,10 +3109,6 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
        }
 
        mutex_unlock(&ifmgd->mtx);
-
-       mutex_lock(&local->mtx);
-       ieee80211_recalc_idle(local);
-       mutex_unlock(&local->mtx);
 }
 
 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
@@ -3644,10 +3622,6 @@ static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
                        return -ENOMEM;
        }
 
-       mutex_lock(&local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&local->mtx);
-
        if (new_sta) {
                u32 rates = 0, basic_rates = 0;
                bool have_higher_than_11mbit;
@@ -4138,10 +4112,6 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
        mutex_unlock(&ifmgd->mtx);
 
  out:
-       mutex_lock(&sdata->local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&sdata->local->mtx);
-
        if (sent_frame)
                __cfg80211_send_deauth(sdata->dev, frame_buf,
                                       IEEE80211_DEAUTH_FRAME_LEN);
@@ -4182,10 +4152,6 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
        __cfg80211_send_disassoc(sdata->dev, frame_buf,
                                 IEEE80211_DEAUTH_FRAME_LEN);
 
-       mutex_lock(&sdata->local->mtx);
-       ieee80211_recalc_idle(sdata->local);
-       mutex_unlock(&sdata->local->mtx);
-
        return 0;
 }