diff options
| -rw-r--r-- | include/net/mac80211.h | 50 | ||||
| -rw-r--r-- | net/mac80211/cfg.c | 27 | ||||
| -rw-r--r-- | net/mac80211/driver-ops.h | 29 | ||||
| -rw-r--r-- | net/mac80211/driver-trace.h | 88 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 9 | ||||
| -rw-r--r-- | net/mac80211/main.c | 6 | ||||
| -rw-r--r-- | net/mac80211/rx.c | 6 | ||||
| -rw-r--r-- | net/mac80211/scan.c | 99 |
8 files changed, 292 insertions, 22 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 9e55427..62a1c22 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -537,6 +537,21 @@ struct ieee80211_tx_info { }; }; +/** + * ieee80211_sched_scan_ies - scheduled scan IEs + * + * This structure is used to pass the appropriate IEs to be used in scheduled + * scans for all bands. It contains both the IEs passed from the userspace + * and the ones generated by mac80211. + * + * @ie: array with the IEs for each supported band + * @len: array with the total length of the IEs for each band + */ +struct ieee80211_sched_scan_ies { + u8 *ie[IEEE80211_NUM_BANDS]; + size_t len[IEEE80211_NUM_BANDS]; +}; + static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) { return (struct ieee80211_tx_info *)skb->cb; @@ -1693,6 +1708,13 @@ enum ieee80211_ampdu_mlme_action { * any error unless this callback returned a negative error code. * The callback can sleep. * + * @sched_scan_start: Ask the hardware to start scanning repeatedly at + * specific intervals. The driver must call the + * ieee80211_sched_scan_results() function whenever it finds results. + * This process will continue until sched_scan_stop is called. + * + * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. + * * @sw_scan_start: Notifier function that is called just before a software scan * is started. Can be NULL, if the driver doesn't need this notification. * The callback can sleep. @@ -1877,6 +1899,12 @@ struct ieee80211_ops { u32 iv32, u16 *phase1key); int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct cfg80211_scan_request *req); + int (*sched_scan_start)(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_sched_scan_request *req, + struct ieee80211_sched_scan_ies *ies); + void (*sched_scan_stop)(struct ieee80211_hw *hw, + struct ieee80211_vif *vif); void (*sw_scan_start)(struct ieee80211_hw *hw); void (*sw_scan_complete)(struct ieee80211_hw *hw); int (*get_stats)(struct ieee80211_hw *hw, @@ -2594,6 +2622,28 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw); void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); /** + * ieee80211_sched_scan_results - got results from scheduled scan + * + * When a scheduled scan is running, this function needs to be called by the + * driver whenever there are new scan results available. + * + * @hw: the hardware that is performing scheduled scans + */ +void ieee80211_sched_scan_results(struct ieee80211_hw *hw); + +/** + * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped + * + * When a scheduled scan is running, this function can be called by + * the driver if it needs to stop the scan to perform another task. + * Usual scenarios are drivers that cannot continue the scheduled scan + * while associating, for instance. + * + * @hw: the hardware that is performing scheduled scans + */ +void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); + +/** * ieee80211_iterate_active_interfaces - iterate active interfaces * * This function iterates over the interfaces associated with a given diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index c416cce..a2ff474 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1362,6 +1362,31 @@ static int ieee80211_scan(struct wiphy *wiphy, return ieee80211_request_scan(sdata, req); } +static int +ieee80211_sched_scan_start(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_sched_scan_request *req) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (!sdata->local->ops->sched_scan_start) + return -EOPNOTSUPP; + + return ieee80211_request_sched_scan_start(sdata, req); +} + +static int +ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev, + bool driver_initiated) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (!sdata->local->ops->sched_scan_stop) + return -EOPNOTSUPP; + + return ieee80211_request_sched_scan_stop(sdata, driver_initiated); +} + static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_auth_request *req) { @@ -2103,6 +2128,8 @@ struct cfg80211_ops mac80211_config_ops = { .suspend = ieee80211_suspend, .resume = ieee80211_resume, .scan = ieee80211_scan, + .sched_scan_start = ieee80211_sched_scan_start, + .sched_scan_stop = ieee80211_sched_scan_stop, .auth = ieee80211_auth, .assoc = ieee80211_assoc, .deauth = ieee80211_deauth, diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index aa16bd8..eebf7a6 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -212,12 +212,39 @@ static inline int drv_hw_scan(struct ieee80211_local *local, might_sleep(); - trace_drv_hw_scan(local, sdata, req); + trace_drv_hw_scan(local, sdata); ret = local->ops->hw_scan(&local->hw, &sdata->vif, req); trace_drv_return_int(local, ret); return ret; } +static inline int +drv_sched_scan_start(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, + struct cfg80211_sched_scan_request *req, + struct ieee80211_sched_scan_ies *ies) +{ + int ret; + + might_sleep(); + + trace_drv_sched_scan_start(local, sdata); + ret = local->ops->sched_scan_start(&local->hw, &sdata->vif, + req, ies); + trace_drv_return_int(local, ret); + return ret; +} + +static inline void drv_sched_scan_stop(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata) +{ + might_sleep(); + + trace_drv_sched_scan_stop(local, sdata); + local->ops->sched_scan_stop(&local->hw, &sdata->vif); + trace_drv_return_void(local); +} + static inline void drv_sw_scan_start(struct ieee80211_local *local) { might_sleep(); diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h index dd9779d..ed9edcb 100644 --- a/net/mac80211/driver-trace.h +++ b/net/mac80211/driver-trace.h @@ -98,6 +98,27 @@ DECLARE_EVENT_CLASS(local_u32_evt, ) ); +DECLARE_EVENT_CLASS(local_sdata_evt, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata), + TP_ARGS(local, sdata), + + TP_STRUCT__entry( + LOCAL_ENTRY + VIF_ENTRY + ), + + TP_fast_assign( + LOCAL_ASSIGN; + VIF_ASSIGN; + ), + + TP_printk( + LOCAL_PR_FMT VIF_PR_FMT, + LOCAL_PR_ARG, VIF_PR_ARG + ) +); + DEFINE_EVENT(local_only_evt, drv_return_void, TP_PROTO(struct ieee80211_local *local), TP_ARGS(local) @@ -433,27 +454,22 @@ TRACE_EVENT(drv_update_tkip_key, ) ); -TRACE_EVENT(drv_hw_scan, +DEFINE_EVENT(local_sdata_evt, drv_hw_scan, TP_PROTO(struct ieee80211_local *local, - struct ieee80211_sub_if_data *sdata, - struct cfg80211_scan_request *req), - - TP_ARGS(local, sdata, req), - - TP_STRUCT__entry( - LOCAL_ENTRY - VIF_ENTRY - ), + struct ieee80211_sub_if_data *sdata), + TP_ARGS(local, sdata) +); - TP_fast_assign( - LOCAL_ASSIGN; - VIF_ASSIGN; - ), +DEFINE_EVENT(local_sdata_evt, drv_sched_scan_start, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata), + TP_ARGS(local, sdata) +); - TP_printk( - LOCAL_PR_FMT VIF_PR_FMT, - LOCAL_PR_ARG,VIF_PR_ARG - ) +DEFINE_EVENT(local_sdata_evt, drv_sched_scan_stop, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata), + TP_ARGS(local, sdata) ); DEFINE_EVENT(local_only_evt, drv_sw_scan_start, @@ -1180,6 +1196,42 @@ TRACE_EVENT(api_scan_completed, ) ); +TRACE_EVENT(api_sched_scan_results, + TP_PROTO(struct ieee80211_local *local), + + TP_ARGS(local), + + TP_STRUCT__entry( + LOCAL_ENTRY + ), + + TP_fast_assign( + LOCAL_ASSIGN; + ), + + TP_printk( + LOCAL_PR_FMT, LOCAL_PR_ARG + ) +); + +TRACE_EVENT(api_sched_scan_stopped, + TP_PROTO(struct ieee80211_local *local), + + TP_ARGS(local), + + TP_STRUCT__entry( + LOCAL_ENTRY + ), + + TP_fast_assign( + LOCAL_ASSIGN; + ), + + TP_printk( + LOCAL_PR_FMT, LOCAL_PR_ARG + ) +); + TRACE_EVENT(api_sta_block_awake, TP_PROTO(struct ieee80211_local *local, struct ieee80211_sta *sta, bool block), diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 7f4d0dc..6f55a78 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -847,6 +847,9 @@ struct ieee80211_local { int scan_channel_idx; int scan_ies_len; + bool sched_scanning; + struct ieee80211_sched_scan_ies sched_scan_ies; + unsigned long leave_oper_channel_time; enum mac80211_scan_state next_scan_state; struct delayed_work scan_work; @@ -1154,6 +1157,12 @@ ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq, void ieee80211_rx_bss_put(struct ieee80211_local *local, struct ieee80211_bss *bss); +/* scheduled scan handling */ +int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, + struct cfg80211_sched_scan_request *req); +int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata, + bool driver_initiated); + /* off-channel helpers */ bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local); void ieee80211_offchannel_enable_all_ps(struct ieee80211_local *local, diff --git a/net/mac80211/main.c b/net/mac80211/main.c index ab1f464..30e6a68 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -358,7 +358,8 @@ static void ieee80211_restart_work(struct work_struct *work) flush_workqueue(local->workqueue); mutex_lock(&local->mtx); - WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), + WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || + local->sched_scanning, "%s called with hardware scan in progress\n", __func__); mutex_unlock(&local->mtx); @@ -833,6 +834,9 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (!local->ops->remain_on_channel) local->hw.wiphy->max_remain_on_channel_duration = 5000; + if (local->ops->sched_scan_start) + local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; + result = wiphy_register(local->hw.wiphy); if (result < 0) goto fail_wiphy_register; diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 634f3d9..1b9413f 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -404,11 +404,13 @@ ieee80211_rx_h_passive_scan(struct ieee80211_rx_data *rx) struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); struct sk_buff *skb = rx->skb; - if (likely(!(status->rx_flags & IEEE80211_RX_IN_SCAN))) + if (likely(!(status->rx_flags & IEEE80211_RX_IN_SCAN) && + !local->sched_scanning)) return RX_CONTINUE; if (test_bit(SCAN_HW_SCANNING, &local->scanning) || - test_bit(SCAN_SW_SCANNING, &local->scanning)) + test_bit(SCAN_SW_SCANNING, &local->scanning) || + local->sched_scanning) return ieee80211_scan_rx(rx->sdata, skb); /* scanning finished during invoking of handlers */ diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 8acce72..ea44a8e 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -15,6 +15,7 @@ #include <linux/if_arp.h> #include <linux/rtnetlink.h> #include <linux/pm_qos_params.h> +#include <linux/slab.h> #include <net/sch_generic.h> #include <linux/slab.h> #include <net/mac80211.h> @@ -850,3 +851,101 @@ void ieee80211_scan_cancel(struct ieee80211_local *local) } mutex_unlock(&local->mtx); } + +int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, + struct cfg80211_sched_scan_request *req) +{ + struct ieee80211_local *local = sdata->local; + int ret, i; + + mutex_lock(&sdata->local->mtx); + + if (local->sched_scanning) { + ret = -EBUSY; + goto out; + } + + if (!local->ops->sched_scan_start) { + ret = -ENOTSUPP; + goto out; + } + + for (i = 0; i < IEEE80211_NUM_BANDS; i++) { + local->sched_scan_ies.ie[i] = kzalloc(2 + + IEEE80211_MAX_SSID_LEN + + local->scan_ies_len, + GFP_KERNEL); + if (!local->sched_scan_ies.ie[i]) { + ret = -ENOMEM; + goto out_free; + } + + local->sched_scan_ies.len[i] = + ieee80211_build_preq_ies(local, + local->sched_scan_ies.ie[i], + req->ie, req->ie_len, i, + (u32) -1, 0); + } + + ret = drv_sched_scan_start(local, sdata, req, + &local->sched_scan_ies); + if (ret == 0) { + local->sched_scanning = true; + goto out; + } + +out_free: + while (i > 0) + kfree(local->sched_scan_ies.ie[--i]); +out: + mutex_unlock(&sdata->local->mtx); + return ret; +} + +int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata, + bool driver_initiated) +{ + struct ieee80211_local *local = sdata->local; + int ret = 0, i; + + mutex_lock(&sdata->local->mtx); + + if (!local->ops->sched_scan_stop) { + ret = -ENOTSUPP; + goto out; + } + + if (local->sched_scanning) { + for (i = 0; i < IEEE80211_NUM_BANDS; i++) + kfree(local->sched_scan_ies.ie[i]); + + if (!driver_initiated) + drv_sched_scan_stop(local, sdata); + local->sched_scanning = false; + } + +out: + mutex_unlock(&sdata->local->mtx); + + return ret; +} + +void ieee80211_sched_scan_results(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + trace_api_sched_scan_results(local); + + cfg80211_sched_scan_results(hw->wiphy); +} +EXPORT_SYMBOL(ieee80211_sched_scan_results); + +void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + trace_api_sched_scan_stopped(local); + + cfg80211_sched_scan_stopped(hw->wiphy); +} +EXPORT_SYMBOL(ieee80211_sched_scan_stopped); |