diff options
| -rw-r--r-- | net/mac80211/cfg.c | 10 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 4 | ||||
| -rw-r--r-- | net/mac80211/iface.c | 27 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 2 | ||||
| -rw-r--r-- | net/mac80211/pm.c | 3 | ||||
| -rw-r--r-- | net/mac80211/sta_info.c | 58 | ||||
| -rw-r--r-- | net/mac80211/sta_info.h | 27 |
7 files changed, 12 insertions, 119 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 8b790e7..e11bdb6 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1098,15 +1098,11 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) kfree_rcu(old_probe_resp, rcu_head); list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) - sta_info_flush_defer(vlan); - sta_info_flush_defer(sdata); + sta_info_flush(vlan); + sta_info_flush(sdata); synchronize_net(); - rcu_barrier(); - list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { - sta_info_flush_cleanup(vlan); + list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) ieee80211_free_keys(vlan); - } - sta_info_flush_cleanup(sdata); ieee80211_free_keys(sdata); sdata->vif.bss_conf.enable_beacon = false; diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index ed5bf8b..44330b8 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -776,10 +776,6 @@ struct ieee80211_sub_if_data { u32 mntr_flags; } u; - spinlock_t cleanup_stations_lock; - struct list_head cleanup_stations; - struct work_struct cleanup_stations_wk; - #ifdef CONFIG_MAC80211_DEBUGFS struct { struct dentry *subdir_stations; diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 1fe5d58..687d4ea 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -786,10 +786,8 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, * This is relevant only in WDS mode, in all other modes we've * already removed all stations when disconnecting or similar, * so warn otherwise. - * - * We call sta_info_flush_cleanup() later, to combine RCU waits. */ - flushed = sta_info_flush_defer(sdata); + flushed = sta_info_flush(sdata); WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) || (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)); @@ -892,16 +890,11 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, /* * When we get here, the interface is marked down. * - * sta_info_flush_cleanup() requires rcu_barrier() - * first to wait for the station call_rcu() calls - * to complete, and we also need synchronize_rcu() - * to wait for the RX path in case it is using the - * interface and enqueuing frames at this very time on - * another CPU. + * We need synchronize_rcu() to wait for the RX path in + * case it is using the interface and enqueuing frames + * at this very time on another CPU. */ synchronize_rcu(); - rcu_barrier(); - sta_info_flush_cleanup(sdata); /* * Free all remaining keys, there shouldn't be any, @@ -1568,15 +1561,6 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local, mutex_unlock(&local->iflist_mtx); } -static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk) -{ - struct ieee80211_sub_if_data *sdata; - - sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk); - - ieee80211_cleanup_sdata_stas(sdata); -} - int ieee80211_if_add(struct ieee80211_local *local, const char *name, struct wireless_dev **new_wdev, enum nl80211_iftype type, struct vif_params *params) @@ -1649,9 +1633,6 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name, INIT_LIST_HEAD(&sdata->key_list); - spin_lock_init(&sdata->cleanup_stations_lock); - INIT_LIST_HEAD(&sdata->cleanup_stations); - INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk); INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work, ieee80211_dfs_cac_timer_work); INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk, diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 900ead3..9c2c7ee 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -1698,7 +1698,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, memset(ifmgd->bssid, 0, ETH_ALEN); /* remove AP and TDLS peers */ - sta_info_flush_defer(sdata); + sta_info_flush(sdata); /* finally reset all BSS / config parameters */ changed |= ieee80211_reset_erp_info(sdata); diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 3401262..af64fb8 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -37,9 +37,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_SUSPEND); - /* flush out all packets and station cleanup call_rcu()s */ + /* flush out all packets */ synchronize_net(); - rcu_barrier(); ieee80211_flush_queues(local, NULL); diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 557ac25..7241f322 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -99,23 +99,6 @@ static void cleanup_single_sta(struct sta_info *sta) struct ieee80211_local *local = sdata->local; struct ps_data *ps; - /* - * At this point, when being called as call_rcu callback, - * neither mac80211 nor the driver can reference this - * sta struct any more except by still existing timers - * associated with this station that we clean up below. - * - * Note though that this still uses the sdata and even - * calls the driver in AP and mesh mode, so interfaces - * of those types mush use call sta_info_flush_cleanup() - * (typically via sta_info_flush()) before deconfiguring - * the driver. - * - * In station mode, nothing happens here so it doesn't - * have to (and doesn't) do that, this is intentional to - * speed up roaming. - */ - if (test_sta_flag(sta, WLAN_STA_PS_STA)) { if (sta->sdata->vif.type == NL80211_IFTYPE_AP || sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) @@ -160,37 +143,6 @@ static void cleanup_single_sta(struct sta_info *sta) sta_info_free(local, sta); } -void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata) -{ - struct sta_info *sta; - - spin_lock_bh(&sdata->cleanup_stations_lock); - while (!list_empty(&sdata->cleanup_stations)) { - sta = list_first_entry(&sdata->cleanup_stations, - struct sta_info, list); - list_del(&sta->list); - spin_unlock_bh(&sdata->cleanup_stations_lock); - - cleanup_single_sta(sta); - - spin_lock_bh(&sdata->cleanup_stations_lock); - } - - spin_unlock_bh(&sdata->cleanup_stations_lock); -} - -static void free_sta_rcu(struct rcu_head *h) -{ - struct sta_info *sta = container_of(h, struct sta_info, rcu_head); - struct ieee80211_sub_if_data *sdata = sta->sdata; - - spin_lock(&sdata->cleanup_stations_lock); - list_add_tail(&sta->list, &sdata->cleanup_stations); - spin_unlock(&sdata->cleanup_stations_lock); - - ieee80211_queue_work(&sdata->local->hw, &sdata->cleanup_stations_wk); -} - /* protected by RCU */ struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, const u8 *addr) @@ -909,7 +861,7 @@ int __must_check __sta_info_destroy(struct sta_info *sta) ieee80211_sta_debugfs_remove(sta); ieee80211_recalc_min_chandef(sdata); - call_rcu(&sta->rcu_head, free_sta_rcu); + cleanup_single_sta(sta); return 0; } @@ -979,7 +931,7 @@ void sta_info_stop(struct ieee80211_local *local) } -int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata) +int sta_info_flush(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; struct sta_info *sta, *tmp; @@ -999,12 +951,6 @@ int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata) return ret; } -void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata) -{ - ieee80211_cleanup_sdata_stas(sdata); - cancel_work_sync(&sdata->cleanup_stations_wk); -} - void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, unsigned long exp_time) { diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 0218caf..9104f81 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -605,21 +605,6 @@ void sta_info_recalc_tim(struct sta_info *sta); void sta_info_init(struct ieee80211_local *local); void sta_info_stop(struct ieee80211_local *local); -int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata); - -/** - * sta_info_flush_cleanup - flush the sta_info cleanup queue - * @sdata: the interface - * - * Flushes the sta_info cleanup queue for a given interface; - * this is necessary before the interface is removed or, for - * AP/mesh interfaces, before it is deconfigured. - * - * Note an rcu_barrier() must precede the function, after all - * stations have been flushed/removed to ensure the call_rcu() - * calls that add stations to the cleanup queue have completed. - */ -void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata); /** * sta_info_flush - flush matching STA entries from the STA table @@ -628,15 +613,7 @@ void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata); * * @sdata: sdata to remove all stations from */ -static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) -{ - int ret = sta_info_flush_defer(sdata); - - rcu_barrier(); - sta_info_flush_cleanup(sdata); - - return ret; -} +int sta_info_flush(struct ieee80211_sub_if_data *sdata); void sta_set_rate_info_tx(struct sta_info *sta, const struct ieee80211_tx_rate *rate, @@ -651,6 +628,4 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); -void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata); - #endif /* STA_INFO_H */ |