mac80211: handle failed restart/resume better
When the driver fails during HW restart or resume, the whole stack goes into a very confused state with interfaces being up while the hardware is down etc. Address this by shutting down everything; we'll run into a lot of warnings in the process but that's better than having the whole stack get messed up. Reviewed-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
parent
f29f58a9e5
commit
f6837ba8c9
6 changed files with 153 additions and 51 deletions
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@ -4771,6 +4771,20 @@ int cfg80211_iter_combinations(struct wiphy *wiphy,
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void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
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gfp_t gfp);
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/**
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* cfg80211_shutdown_all_interfaces - shut down all interfaces for a wiphy
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* @wiphy: the wiphy to shut down
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*
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* This function shuts down all interfaces belonging to this wiphy by
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* calling dev_close() (and treating non-netdev interfaces as needed).
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* It shouldn't really be used unless there are some fatal device errors
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* that really can't be recovered in any other way.
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*
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* Callers must hold the RTNL and be able to deal with callbacks into
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* the driver while the function is running.
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*/
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void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy);
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/* Logging, debugging and troubleshooting/diagnostic helpers. */
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/* wiphy_printk helpers, similar to dev_printk */
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@ -5,11 +5,11 @@
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#include "ieee80211_i.h"
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#include "trace.h"
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static inline void check_sdata_in_driver(struct ieee80211_sub_if_data *sdata)
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static inline bool check_sdata_in_driver(struct ieee80211_sub_if_data *sdata)
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{
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WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER),
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"%s: Failed check-sdata-in-driver check, flags: 0x%x\n",
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sdata->dev ? sdata->dev->name : sdata->name, sdata->flags);
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return !WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER),
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"%s: Failed check-sdata-in-driver check, flags: 0x%x\n",
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sdata->dev ? sdata->dev->name : sdata->name, sdata->flags);
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}
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static inline struct ieee80211_sub_if_data *
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@ -168,7 +168,8 @@ static inline int drv_change_interface(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_change_interface(local, sdata, type, p2p);
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ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
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@ -181,7 +182,8 @@ static inline void drv_remove_interface(struct ieee80211_local *local,
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_remove_interface(local, sdata);
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local->ops->remove_interface(&local->hw, &sdata->vif);
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@ -219,7 +221,8 @@ static inline void drv_bss_info_changed(struct ieee80211_local *local,
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sdata->vif.type == NL80211_IFTYPE_MONITOR))
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return;
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_bss_info_changed(local, sdata, info, changed);
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if (local->ops->bss_info_changed)
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@ -278,7 +281,8 @@ static inline int drv_set_key(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_set_key(local, cmd, sdata, sta, key);
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ret = local->ops->set_key(&local->hw, cmd, &sdata->vif, sta, key);
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@ -298,7 +302,8 @@ static inline void drv_update_tkip_key(struct ieee80211_local *local,
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ista = &sta->sta;
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_update_tkip_key(local, sdata, conf, ista, iv32);
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if (local->ops->update_tkip_key)
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@ -315,7 +320,8 @@ static inline int drv_hw_scan(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_hw_scan(local, sdata);
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ret = local->ops->hw_scan(&local->hw, &sdata->vif, req);
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@ -328,7 +334,8 @@ static inline void drv_cancel_hw_scan(struct ieee80211_local *local,
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_cancel_hw_scan(local, sdata);
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local->ops->cancel_hw_scan(&local->hw, &sdata->vif);
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@ -345,7 +352,8 @@ drv_sched_scan_start(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_sched_scan_start(local, sdata);
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ret = local->ops->sched_scan_start(&local->hw, &sdata->vif,
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@ -361,7 +369,8 @@ static inline int drv_sched_scan_stop(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_sched_scan_stop(local, sdata);
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ret = local->ops->sched_scan_stop(&local->hw, &sdata->vif);
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@ -462,7 +471,8 @@ static inline void drv_sta_notify(struct ieee80211_local *local,
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struct ieee80211_sta *sta)
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{
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_sta_notify(local, sdata, cmd, sta);
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if (local->ops->sta_notify)
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@ -479,7 +489,8 @@ static inline int drv_sta_add(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_sta_add(local, sdata, sta);
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if (local->ops->sta_add)
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@ -497,7 +508,8 @@ static inline void drv_sta_remove(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_sta_remove(local, sdata, sta);
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if (local->ops->sta_remove)
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@ -515,7 +527,8 @@ static inline void drv_sta_add_debugfs(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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if (local->ops->sta_add_debugfs)
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local->ops->sta_add_debugfs(&local->hw, &sdata->vif,
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@ -545,7 +558,8 @@ static inline void drv_sta_pre_rcu_remove(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_sta_pre_rcu_remove(local, sdata, &sta->sta);
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if (local->ops->sta_pre_rcu_remove)
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@ -566,7 +580,8 @@ int drv_sta_state(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
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if (local->ops->sta_state) {
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@ -590,7 +605,8 @@ static inline void drv_sta_rc_update(struct ieee80211_local *local,
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struct ieee80211_sta *sta, u32 changed)
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{
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
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(sdata->vif.type != NL80211_IFTYPE_ADHOC &&
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@ -612,7 +628,8 @@ static inline int drv_conf_tx(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_conf_tx(local, sdata, ac, params);
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if (local->ops->conf_tx)
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@ -629,7 +646,8 @@ static inline u64 drv_get_tsf(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return ret;
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trace_drv_get_tsf(local, sdata);
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if (local->ops->get_tsf)
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@ -644,7 +662,8 @@ static inline void drv_set_tsf(struct ieee80211_local *local,
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_set_tsf(local, sdata, tsf);
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if (local->ops->set_tsf)
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@ -657,7 +676,8 @@ static inline void drv_reset_tsf(struct ieee80211_local *local,
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_reset_tsf(local, sdata);
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if (local->ops->reset_tsf)
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@ -689,7 +709,8 @@ static inline int drv_ampdu_action(struct ieee80211_local *local,
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might_sleep();
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sdata = get_bss_sdata(sdata);
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_ampdu_action(local, sdata, action, sta, tid, ssn, buf_size);
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@ -733,8 +754,8 @@ static inline void drv_flush(struct ieee80211_local *local,
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might_sleep();
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if (sdata)
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check_sdata_in_driver(sdata);
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if (sdata && !check_sdata_in_driver(sdata))
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return;
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trace_drv_flush(local, queues, drop);
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if (local->ops->flush)
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@ -854,7 +875,8 @@ static inline int drv_set_bitrate_mask(struct ieee80211_local *local,
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_set_bitrate_mask(local, sdata, mask);
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if (local->ops->set_bitrate_mask)
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@ -869,7 +891,8 @@ static inline void drv_set_rekey_data(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct cfg80211_gtk_rekey_data *data)
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{
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_set_rekey_data(local, sdata, data);
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if (local->ops->set_rekey_data)
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@ -937,7 +960,8 @@ static inline void drv_mgd_prepare_tx(struct ieee80211_local *local,
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION);
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trace_drv_mgd_prepare_tx(local, sdata);
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@ -964,6 +988,9 @@ static inline int drv_add_chanctx(struct ieee80211_local *local,
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static inline void drv_remove_chanctx(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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if (WARN_ON(!ctx->driver_present))
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return;
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trace_drv_remove_chanctx(local, ctx);
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if (local->ops->remove_chanctx)
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local->ops->remove_chanctx(&local->hw, &ctx->conf);
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@ -989,7 +1016,8 @@ static inline int drv_assign_vif_chanctx(struct ieee80211_local *local,
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{
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int ret = 0;
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_assign_vif_chanctx(local, sdata, ctx);
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if (local->ops->assign_vif_chanctx) {
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@ -1007,7 +1035,8 @@ static inline void drv_unassign_vif_chanctx(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct ieee80211_chanctx *ctx)
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{
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_unassign_vif_chanctx(local, sdata, ctx);
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if (local->ops->unassign_vif_chanctx) {
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@ -1024,7 +1053,8 @@ static inline int drv_start_ap(struct ieee80211_local *local,
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{
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int ret = 0;
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_start_ap(local, sdata, &sdata->vif.bss_conf);
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if (local->ops->start_ap)
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@ -1036,7 +1066,8 @@ static inline int drv_start_ap(struct ieee80211_local *local,
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static inline void drv_stop_ap(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata)
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{
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_stop_ap(local, sdata);
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if (local->ops->stop_ap)
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@ -1059,7 +1090,8 @@ drv_set_default_unicast_key(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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int key_idx)
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{
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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WARN_ON_ONCE(key_idx < -1 || key_idx > 3);
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@ -1101,7 +1133,8 @@ static inline int drv_join_ibss(struct ieee80211_local *local,
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int ret = 0;
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return -EIO;
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trace_drv_join_ibss(local, sdata, &sdata->vif.bss_conf);
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if (local->ops->join_ibss)
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@ -1114,7 +1147,8 @@ static inline void drv_leave_ibss(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata)
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{
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might_sleep();
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check_sdata_in_driver(sdata);
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if (!check_sdata_in_driver(sdata))
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return;
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trace_drv_leave_ibss(local, sdata);
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if (local->ops->leave_ibss)
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@ -1459,6 +1459,7 @@ __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
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int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
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struct cfg80211_sched_scan_request *req);
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int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata);
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void ieee80211_sched_scan_end(struct ieee80211_local *local);
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void ieee80211_sched_scan_stopped_work(struct work_struct *work);
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/* off-channel helpers */
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@ -1076,12 +1076,8 @@ void ieee80211_sched_scan_results(struct ieee80211_hw *hw)
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}
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EXPORT_SYMBOL(ieee80211_sched_scan_results);
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void ieee80211_sched_scan_stopped_work(struct work_struct *work)
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void ieee80211_sched_scan_end(struct ieee80211_local *local)
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{
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struct ieee80211_local *local =
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container_of(work, struct ieee80211_local,
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sched_scan_stopped_work);
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mutex_lock(&local->mtx);
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if (!rcu_access_pointer(local->sched_scan_sdata)) {
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@ -1099,6 +1095,15 @@ void ieee80211_sched_scan_stopped_work(struct work_struct *work)
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cfg80211_sched_scan_stopped(local->hw.wiphy);
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}
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void ieee80211_sched_scan_stopped_work(struct work_struct *work)
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{
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||||
struct ieee80211_local *local =
|
||||
container_of(work, struct ieee80211_local,
|
||||
sched_scan_stopped_work);
|
||||
|
||||
ieee80211_sched_scan_end(local);
|
||||
}
|
||||
|
||||
void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
|
||||
{
|
||||
struct ieee80211_local *local = hw_to_local(hw);
|
||||
|
|
|
|||
|
|
@ -1457,6 +1457,44 @@ void ieee80211_stop_device(struct ieee80211_local *local)
|
|||
drv_stop(local);
|
||||
}
|
||||
|
||||
static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
|
||||
{
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
struct ieee80211_chanctx *ctx;
|
||||
|
||||
/*
|
||||
* We get here if during resume the device can't be restarted properly.
|
||||
* We might also get here if this happens during HW reset, which is a
|
||||
* slightly different situation and we need to drop all connections in
|
||||
* the latter case.
|
||||
*
|
||||
* Ask cfg80211 to turn off all interfaces, this will result in more
|
||||
* warnings but at least we'll then get into a clean stopped state.
|
||||
*/
|
||||
|
||||
local->resuming = false;
|
||||
local->suspended = false;
|
||||
local->started = false;
|
||||
|
||||
/* scheduled scan clearly can't be running any more, but tell
|
||||
* cfg80211 and clear local state
|
||||
*/
|
||||
ieee80211_sched_scan_end(local);
|
||||
|
||||
list_for_each_entry(sdata, &local->interfaces, list)
|
||||
sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
|
||||
|
||||
/* Mark channel contexts as not being in the driver any more to avoid
|
||||
* removing them from the driver during the shutdown process...
|
||||
*/
|
||||
mutex_lock(&local->chanctx_mtx);
|
||||
list_for_each_entry(ctx, &local->chanctx_list, list)
|
||||
ctx->driver_present = false;
|
||||
mutex_unlock(&local->chanctx_mtx);
|
||||
|
||||
cfg80211_shutdown_all_interfaces(local->hw.wiphy);
|
||||
}
|
||||
|
||||
static void ieee80211_assign_chanctx(struct ieee80211_local *local,
|
||||
struct ieee80211_sub_if_data *sdata)
|
||||
{
|
||||
|
|
@ -1520,9 +1558,11 @@ int ieee80211_reconfig(struct ieee80211_local *local)
|
|||
*/
|
||||
res = drv_start(local);
|
||||
if (res) {
|
||||
WARN(local->suspended, "Hardware became unavailable "
|
||||
"upon resume. This could be a software issue "
|
||||
"prior to suspend or a hardware issue.\n");
|
||||
if (local->suspended)
|
||||
WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
|
||||
else
|
||||
WARN(1, "Hardware became unavailable during restart.\n");
|
||||
ieee80211_handle_reconfig_failure(local);
|
||||
return res;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -210,15 +210,12 @@ void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
|
|||
}
|
||||
}
|
||||
|
||||
static int cfg80211_rfkill_set_block(void *data, bool blocked)
|
||||
void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
|
||||
{
|
||||
struct cfg80211_registered_device *rdev = data;
|
||||
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
||||
struct wireless_dev *wdev;
|
||||
|
||||
if (!blocked)
|
||||
return 0;
|
||||
|
||||
rtnl_lock();
|
||||
ASSERT_RTNL();
|
||||
|
||||
list_for_each_entry(wdev, &rdev->wdev_list, list) {
|
||||
if (wdev->netdev) {
|
||||
|
|
@ -234,7 +231,18 @@ static int cfg80211_rfkill_set_block(void *data, bool blocked)
|
|||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
|
||||
|
||||
static int cfg80211_rfkill_set_block(void *data, bool blocked)
|
||||
{
|
||||
struct cfg80211_registered_device *rdev = data;
|
||||
|
||||
if (!blocked)
|
||||
return 0;
|
||||
|
||||
rtnl_lock();
|
||||
cfg80211_shutdown_all_interfaces(&rdev->wiphy);
|
||||
rtnl_unlock();
|
||||
|
||||
return 0;
|
||||
|
|
|
|||
Loading…
Reference in a new issue