From c7c71066c27f2bafb2ce3b10c407c0285f56acfa Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 21 Aug 2013 22:07:20 +0200 Subject: mac80211: add ieee80211_iterate_active_interfaces_rtnl() If it is needed to disconnect multiple virtual interfaces after (WoWLAN-) suspend, the most obvious approach would be to iterate all interfaces by calling ieee80211_iterate_active_interfaces() and then call ieee80211_resume_disconnect() for each one. This is what the iwlmvm driver does. Unfortunately, this causes a locking dependency from mac80211's iflist_mtx to the key_mtx. This is problematic as the former is intentionally never held while calling any driver operation to allow drivers to iterate with their own locks held. The key_mtx is held while installing a key into the driver though, so this new lock dependency means drivers implementing the logic above can no longer hold their own lock while iterating. To fix this, add a new ieee80211_iterate_active_interfaces_rtnl() function that iterates while the RTNL is already held. This is true during suspend/resume, so that then the locking dependency isn't introduced. While at it, also refactor the various interface iterators and keep only a single implementation called by the various cases. Signed-off-by: Johannes Berg diff --git a/include/net/mac80211.h b/include/net/mac80211.h index cc6035f..3411c59 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -3920,6 +3920,25 @@ void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, void *data); /** + * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces + * + * This function iterates over the interfaces associated with a given + * hardware that are currently active and calls the callback for them. + * This version can only be used while holding the RTNL. + * + * @hw: the hardware struct of which the interfaces should be iterated over + * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags + * @iterator: the iterator function to call, cannot sleep + * @data: first argument of the iterator function + */ +void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, + u32 iter_flags, + void (*iterator)(void *data, + u8 *mac, + struct ieee80211_vif *vif), + void *data); + +/** * ieee80211_queue_work - add work onto the mac80211 workqueue * * Drivers and mac80211 use this to add work onto the mac80211 workqueue. diff --git a/net/mac80211/util.c b/net/mac80211/util.c index e1b34a1..75a1685 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -567,18 +567,15 @@ void ieee80211_flush_queues(struct ieee80211_local *local, IEEE80211_QUEUE_STOP_REASON_FLUSH); } -void ieee80211_iterate_active_interfaces( - struct ieee80211_hw *hw, u32 iter_flags, - void (*iterator)(void *data, u8 *mac, - struct ieee80211_vif *vif), - void *data) +static void __iterate_active_interfaces(struct ieee80211_local *local, + u32 iter_flags, + void (*iterator)(void *data, u8 *mac, + struct ieee80211_vif *vif), + void *data) { - struct ieee80211_local *local = hw_to_local(hw); struct ieee80211_sub_if_data *sdata; - mutex_lock(&local->iflist_mtx); - - list_for_each_entry(sdata, &local->interfaces, list) { + list_for_each_entry_rcu(sdata, &local->interfaces, list) { switch (sdata->vif.type) { case NL80211_IFTYPE_MONITOR: if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) @@ -597,13 +594,25 @@ void ieee80211_iterate_active_interfaces( &sdata->vif); } - sdata = rcu_dereference_protected(local->monitor_sdata, - lockdep_is_held(&local->iflist_mtx)); + sdata = rcu_dereference_check(local->monitor_sdata, + lockdep_is_held(&local->iflist_mtx) || + lockdep_rtnl_is_held()); if (sdata && (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || sdata->flags & IEEE80211_SDATA_IN_DRIVER)) iterator(data, sdata->vif.addr, &sdata->vif); +} +void ieee80211_iterate_active_interfaces( + struct ieee80211_hw *hw, u32 iter_flags, + void (*iterator)(void *data, u8 *mac, + struct ieee80211_vif *vif), + void *data) +{ + struct ieee80211_local *local = hw_to_local(hw); + + mutex_lock(&local->iflist_mtx); + __iterate_active_interfaces(local, iter_flags, iterator, data); mutex_unlock(&local->iflist_mtx); } EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces); @@ -615,38 +624,26 @@ void ieee80211_iterate_active_interfaces_atomic( void *data) { struct ieee80211_local *local = hw_to_local(hw); - struct ieee80211_sub_if_data *sdata; rcu_read_lock(); + __iterate_active_interfaces(local, iter_flags, iterator, data); + rcu_read_unlock(); +} +EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); - list_for_each_entry_rcu(sdata, &local->interfaces, list) { - switch (sdata->vif.type) { - case NL80211_IFTYPE_MONITOR: - if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) - continue; - break; - case NL80211_IFTYPE_AP_VLAN: - continue; - default: - break; - } - if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && - !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) - continue; - if (ieee80211_sdata_running(sdata)) - iterator(data, sdata->vif.addr, - &sdata->vif); - } +void ieee80211_iterate_active_interfaces_rtnl( + struct ieee80211_hw *hw, u32 iter_flags, + void (*iterator)(void *data, u8 *mac, + struct ieee80211_vif *vif), + void *data) +{ + struct ieee80211_local *local = hw_to_local(hw); - sdata = rcu_dereference(local->monitor_sdata); - if (sdata && - (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || - sdata->flags & IEEE80211_SDATA_IN_DRIVER)) - iterator(data, sdata->vif.addr, &sdata->vif); + ASSERT_RTNL(); - rcu_read_unlock(); + __iterate_active_interfaces(local, iter_flags, iterator, data); } -EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); +EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); /* * Nothing should have been stuffed into the workqueue during -- cgit v0.10.2 From c5dc164df6187e845f1a7c0542f5106c74ff5a92 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 28 Aug 2013 19:03:36 +0200 Subject: mac80211: use ERR_CAST() No need for ERR_PTR(PTR_ERR()) since there's ERR_CAST, use it. Reported-by: Fengguang Wu Signed-off-by: Johannes Berg diff --git a/net/mac80211/key.c b/net/mac80211/key.c index 620677e..3e51dd7 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -879,7 +879,7 @@ ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, keyconf->keylen, keyconf->key, 0, NULL); if (IS_ERR(key)) - return ERR_PTR(PTR_ERR(key)); + return ERR_CAST(key); if (sdata->u.mgd.mfp != IEEE80211_MFP_DISABLED) key->conf.flags |= IEEE80211_KEY_FLAG_RX_MGMT; -- cgit v0.10.2 From a6ececf4ee24495ecf74672152e28c31cc208df3 Mon Sep 17 00:00:00 2001 From: Sergey Ryazanov Date: Fri, 30 Aug 2013 01:35:09 +0400 Subject: mac80211: Remove superfluous is_multicast_ether_addr() call Remove superfluous call and use locally stored previous result. Signed-off-by: Sergey Ryazanov Signed-off-by: Johannes Berg diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 3456c04..102ce8a 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1981,7 +1981,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, * EAPOL frames from the local station. */ if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) && - !is_multicast_ether_addr(hdr.addr1) && !authorized && + !multicast && !authorized && (cpu_to_be16(ethertype) != sdata->control_port_protocol || !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) { #ifdef CONFIG_MAC80211_VERBOSE_DEBUG -- cgit v0.10.2 From 392b9ffb05b62fe38aa813b924d160ab663cec8d Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Tue, 27 Aug 2013 11:36:35 +0200 Subject: mac80211: change beacon/connection polling Since when we detect beacon lost we do active AP probing (using nullfunc frame or probe request) there is no need to have beacon polling. Flags IEEE80211_STA_BEACON_POLL seems to be used just for historical reasons. Change also make that after we start connection poll due to beacon loss, next received beacon will abort the poll. Signed-off-by: Stanislaw Gruszka Signed-off-by: Johannes Berg diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index b618651..d353c64 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -322,7 +322,6 @@ struct ieee80211_roc_work { /* flags used in struct ieee80211_if_managed.flags */ enum ieee80211_sta_flags { - IEEE80211_STA_BEACON_POLL = BIT(0), IEEE80211_STA_CONNECTION_POLL = BIT(1), IEEE80211_STA_CONTROL_PORT = BIT(2), IEEE80211_STA_DISABLE_HT = BIT(4), diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 86e4ad5..e396a2a 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -893,8 +893,7 @@ void ieee80211_send_nullfunc(struct ieee80211_local *local, if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; - if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL)) + if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; ieee80211_tx_skb(sdata, skb); @@ -1374,8 +1373,7 @@ static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) if (!mgd->associated) return false; - if (mgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL)) + if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) return false; if (!mgd->have_beacon) @@ -1691,8 +1689,7 @@ static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) { lockdep_assert_held(&sdata->local->mtx); - sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL | - IEEE80211_STA_BEACON_POLL); + sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; ieee80211_run_deferred_scan(sdata->local); } @@ -1954,11 +1951,8 @@ static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) struct ieee80211_local *local = sdata->local; mutex_lock(&local->mtx); - if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL))) { - mutex_unlock(&local->mtx); - return; - } + if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) + goto out; __ieee80211_stop_poll(sdata); @@ -2094,15 +2088,9 @@ static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, * because otherwise we would reset the timer every time and * never check whether we received a probe response! */ - if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL)) + if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) already = true; - if (beacon) - ifmgd->flags |= IEEE80211_STA_BEACON_POLL; - else - ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; - mutex_unlock(&sdata->local->mtx); if (already) @@ -3061,17 +3049,10 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, } } - if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) { + if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { mlme_dbg_ratelimited(sdata, "cancelling AP probe due to a received beacon\n"); - mutex_lock(&local->mtx); - ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL; - ieee80211_run_deferred_scan(local); - mutex_unlock(&local->mtx); - - mutex_lock(&local->iflist_mtx); - ieee80211_recalc_ps(local, -1); - mutex_unlock(&local->iflist_mtx); + ieee80211_reset_ap_probe(sdata); } /* @@ -3543,8 +3524,7 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) run_again(sdata, ifmgd->assoc_data->timeout); - if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL) && + if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && ifmgd->associated) { u8 bssid[ETH_ALEN]; int max_tries; diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 08afe74..ecb57b0 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -391,8 +391,7 @@ static bool ieee80211_can_scan(struct ieee80211_local *local, return false; if (sdata->vif.type == NL80211_IFTYPE_STATION && - sdata->u.mgd.flags & (IEEE80211_STA_BEACON_POLL | - IEEE80211_STA_CONNECTION_POLL)) + sdata->u.mgd.flags & IEEE80211_STA_CONNECTION_POLL) return false; return true; -- cgit v0.10.2 From 45966aebad40dbecb23ee828a8c78870380f5811 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Tue, 27 Aug 2013 16:59:46 +0200 Subject: mac80211: add fixed_rate management to minstrel rc Add the capability to use a fixed modulation rate to minstrel rate controller Signed-off-by: Lorenzo Bianconi Acked-by: Felix Fietkau Signed-off-by: Johannes Berg diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index 8b5f7ef..7fa1b36 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -203,6 +203,15 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) memcpy(mi->max_tp_rate, tmp_tp_rate, sizeof(mi->max_tp_rate)); mi->max_prob_rate = tmp_prob_rate; +#ifdef CONFIG_MAC80211_DEBUGFS + /* use fixed index if set */ + if (mp->fixed_rate_idx != -1) { + mi->max_tp_rate[0] = mp->fixed_rate_idx; + mi->max_tp_rate[1] = mp->fixed_rate_idx; + mi->max_prob_rate = mp->fixed_rate_idx; + } +#endif + /* Reset update timer */ mi->stats_update = jiffies; @@ -310,6 +319,11 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta, /* increase sum packet counter */ mi->packet_count++; +#ifdef CONFIG_MAC80211_DEBUGFS + if (mp->fixed_rate_idx != -1) + return; +#endif + delta = (mi->packet_count * sampling_ratio / 100) - (mi->sample_count + mi->sample_deferred / 2); -- cgit v0.10.2 From 37feb7e2fb5eea361495f529f2a150ea3a34dd41 Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Tue, 27 Aug 2013 16:59:47 +0200 Subject: mac80211: do not override fixed_rate_idx in minstrel_ht_update_stats Do not override max_tp_rate, max_tp_rate2 and max_prob_rate configured according to fixed_rate in minstrel_ht_update_stats throughput computation Signed-off-by: Lorenzo Bianconi Acked-by: Felix Fietkau Signed-off-by: Johannes Berg diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 7c323f2..5d60779 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -365,6 +365,14 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) } } +#ifdef CONFIG_MAC80211_DEBUGFS + /* use fixed index if set */ + if (mp->fixed_rate_idx != -1) { + mi->max_tp_rate = mp->fixed_rate_idx; + mi->max_tp_rate2 = mp->fixed_rate_idx; + mi->max_prob_rate = mp->fixed_rate_idx; + } +#endif mi->stats_update = jiffies; } @@ -774,6 +782,11 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, info->flags |= mi->tx_flags; minstrel_ht_check_cck_shortpreamble(mp, mi, txrc->short_preamble); +#ifdef CONFIG_MAC80211_DEBUGFS + if (mp->fixed_rate_idx != -1) + return; +#endif + /* Don't use EAPOL frames for sampling on non-mrr hw */ if (mp->hw->max_rates == 1 && (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO)) @@ -781,16 +794,6 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, else sample_idx = minstrel_get_sample_rate(mp, mi); -#ifdef CONFIG_MAC80211_DEBUGFS - /* use fixed index if set */ - if (mp->fixed_rate_idx != -1) { - mi->max_tp_rate = mp->fixed_rate_idx; - mi->max_tp_rate2 = mp->fixed_rate_idx; - mi->max_prob_rate = mp->fixed_rate_idx; - sample_idx = -1; - } -#endif - mi->total_packets++; /* wraparound */ -- cgit v0.10.2 From 774f073461dbee0decee7524d9b930a98a3dc30c Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:28 +0200 Subject: cfg80211: export cfg80211_chandef_dfs_required It will be used later by the IBSS CSA implementation of mac80211. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index cb71091..45f6bf5 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -437,6 +437,15 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, u32 prohibited_flags); /** + * cfg80211_chandef_dfs_required - checks if radar detection is required + * @wiphy: the wiphy to validate against + * @chandef: the channel definition to check + * Return: 1 if radar detection is required, 0 if it is not, < 0 on error + */ +int cfg80211_chandef_dfs_required(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef); + +/** * ieee80211_chandef_rate_flags - returns rate flags for a channel * * In some channel types, not all rates may be used - for example CCK diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 50f6195..16f3c3a 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -328,6 +328,7 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, return cfg80211_get_chans_dfs_required(wiphy, chandef->center_freq2, width); } +EXPORT_SYMBOL(cfg80211_chandef_dfs_required); static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, u32 center_freq, u32 bandwidth, diff --git a/net/wireless/core.h b/net/wireless/core.h index 9ad43c6..b43efac 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -382,15 +382,6 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, enum cfg80211_chan_mode chanmode, u8 radar_detect); -/** - * cfg80211_chandef_dfs_required - checks if radar detection is required - * @wiphy: the wiphy to validate against - * @chandef: the channel definition to check - * Return: 1 if radar detection is required, 0 if it is not, < 0 on error - */ -int cfg80211_chandef_dfs_required(struct wiphy *wiphy, - const struct cfg80211_chan_def *c); - void cfg80211_set_dfs_state(struct wiphy *wiphy, const struct cfg80211_chan_def *chandef, enum nl80211_dfs_state dfs_state); -- cgit v0.10.2 From e6b7cde4d3e155f118b81f1f62f86554c529083a Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:29 +0200 Subject: mac80211: split off channel switch parsing function The channel switch parsing function can be re-used for the IBSS code, put the common part into an extra function. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer [also move/rename chandef_downgrade] Signed-off-by: Johannes Berg diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index d353c64..7f0e6da 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1480,6 +1480,29 @@ void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata, void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len); +/** + * ieee80211_parse_ch_switch_ie - parses channel switch IEs + * @sdata: the sdata of the interface which has received the frame + * @elems: parsed 802.11 elements received with the frame + * @beacon: indicates if the frame was a beacon or probe response + * @current_band: indicates the current band + * @sta_flags: contains information about own capabilities and restrictions + * to decide which channel switch announcements can be accepted. Only the + * following subset of &enum ieee80211_sta_flags are evaluated: + * %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT, + * %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ, + * %IEEE80211_STA_DISABLE_160MHZ. + * @count: to be filled with the counter until the switch (on success only) + * @bssid: the currently connected bssid (for reporting) + * @mode: to be filled with CSA mode (on success only) + * @new_chandef: to be filled with destination chandef (on success only) + * Return: 0 on success, <0 on error and >0 if there is nothing to parse. + */ +int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata, + struct ieee802_11_elems *elems, bool beacon, + enum ieee80211_band current_band, + u32 sta_flags, u8 *bssid, u8 *count, u8 *mode, + struct cfg80211_chan_def *new_chandef); /* Suspend/resume and hw reconfiguration */ int ieee80211_reconfig(struct ieee80211_local *local); @@ -1653,6 +1676,7 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, const struct ieee80211_ht_operation *ht_oper, struct cfg80211_chan_def *chandef); +u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c); int __must_check ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index e396a2a..9fce0f49 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -145,66 +145,6 @@ static int ecw2cw(int ecw) return (1 << ecw) - 1; } -static u32 chandef_downgrade(struct cfg80211_chan_def *c) -{ - u32 ret; - int tmp; - - switch (c->width) { - case NL80211_CHAN_WIDTH_20: - c->width = NL80211_CHAN_WIDTH_20_NOHT; - ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; - break; - case NL80211_CHAN_WIDTH_40: - c->width = NL80211_CHAN_WIDTH_20; - c->center_freq1 = c->chan->center_freq; - ret = IEEE80211_STA_DISABLE_40MHZ | - IEEE80211_STA_DISABLE_VHT; - break; - case NL80211_CHAN_WIDTH_80: - tmp = (30 + c->chan->center_freq - c->center_freq1)/20; - /* n_P40 */ - tmp /= 2; - /* freq_P40 */ - c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; - c->width = NL80211_CHAN_WIDTH_40; - ret = IEEE80211_STA_DISABLE_VHT; - break; - case NL80211_CHAN_WIDTH_80P80: - c->center_freq2 = 0; - c->width = NL80211_CHAN_WIDTH_80; - ret = IEEE80211_STA_DISABLE_80P80MHZ | - IEEE80211_STA_DISABLE_160MHZ; - break; - case NL80211_CHAN_WIDTH_160: - /* n_P20 */ - tmp = (70 + c->chan->center_freq - c->center_freq1)/20; - /* n_P80 */ - tmp /= 4; - c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; - c->width = NL80211_CHAN_WIDTH_80; - ret = IEEE80211_STA_DISABLE_80P80MHZ | - IEEE80211_STA_DISABLE_160MHZ; - break; - default: - case NL80211_CHAN_WIDTH_20_NOHT: - WARN_ON_ONCE(1); - c->width = NL80211_CHAN_WIDTH_20_NOHT; - ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; - break; - case NL80211_CHAN_WIDTH_5: - case NL80211_CHAN_WIDTH_10: - WARN_ON_ONCE(1); - /* keep c->width */ - ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; - break; - } - - WARN_ON_ONCE(!cfg80211_chandef_valid(c)); - - return ret; -} - static u32 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband, @@ -352,7 +292,7 @@ out: break; } - ret |= chandef_downgrade(chandef); + ret |= ieee80211_chandef_downgrade(chandef); } if (chandef->width != vht_chandef.width && !tracking) @@ -406,13 +346,13 @@ static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata, */ if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && chandef.width == NL80211_CHAN_WIDTH_80P80) - flags |= chandef_downgrade(&chandef); + flags |= ieee80211_chandef_downgrade(&chandef); if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && chandef.width == NL80211_CHAN_WIDTH_160) - flags |= chandef_downgrade(&chandef); + flags |= ieee80211_chandef_downgrade(&chandef); if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && chandef.width > NL80211_CHAN_WIDTH_20) - flags |= chandef_downgrade(&chandef); + flags |= ieee80211_chandef_downgrade(&chandef); if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef)) return 0; @@ -999,20 +939,12 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct cfg80211_bss *cbss = ifmgd->associated; - struct ieee80211_bss *bss; struct ieee80211_chanctx *chanctx; - enum ieee80211_band new_band; - int new_freq; - u8 new_chan_no; + enum ieee80211_band current_band; u8 count; u8 mode; - struct ieee80211_channel *new_chan; struct cfg80211_chan_def new_chandef = {}; - struct cfg80211_chan_def new_vht_chandef = {}; - const struct ieee80211_sec_chan_offs_ie *sec_chan_offs; - const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie; - const struct ieee80211_ht_operation *ht_oper; - int secondary_channel_offset = -1; + int res; sdata_assert_lock(sdata); @@ -1026,162 +958,23 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED) return; - sec_chan_offs = elems->sec_chan_offs; - wide_bw_chansw_ie = elems->wide_bw_chansw_ie; - ht_oper = elems->ht_operation; - - if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | - IEEE80211_STA_DISABLE_40MHZ)) { - sec_chan_offs = NULL; - wide_bw_chansw_ie = NULL; - /* only used for bandwidth here */ - ht_oper = NULL; - } - - if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT) - wide_bw_chansw_ie = NULL; - - if (elems->ext_chansw_ie) { - if (!ieee80211_operating_class_to_band( - elems->ext_chansw_ie->new_operating_class, - &new_band)) { - sdata_info(sdata, - "cannot understand ECSA IE operating class %d, disconnecting\n", - elems->ext_chansw_ie->new_operating_class); - ieee80211_queue_work(&local->hw, - &ifmgd->csa_connection_drop_work); - } - new_chan_no = elems->ext_chansw_ie->new_ch_num; - count = elems->ext_chansw_ie->count; - mode = elems->ext_chansw_ie->mode; - } else if (elems->ch_switch_ie) { - new_band = cbss->channel->band; - new_chan_no = elems->ch_switch_ie->new_ch_num; - count = elems->ch_switch_ie->count; - mode = elems->ch_switch_ie->mode; - } else { - /* nothing here we understand */ - return; - } - - bss = (void *)cbss->priv; - - new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band); - new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); - if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) { - sdata_info(sdata, - "AP %pM switches to unsupported channel (%d MHz), disconnecting\n", - ifmgd->associated->bssid, new_freq); + current_band = cbss->channel->band; + res = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, current_band, + ifmgd->flags, + ifmgd->associated->bssid, &count, + &mode, &new_chandef); + if (res < 0) ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work); + if (res) return; - } - - if (!beacon && sec_chan_offs) { - secondary_channel_offset = sec_chan_offs->sec_chan_offs; - } else if (beacon && ht_oper) { - secondary_channel_offset = - ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET; - } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { - /* - * If it's not a beacon, HT is enabled and the IE not present, - * it's 20 MHz, 802.11-2012 8.5.2.6: - * This element [the Secondary Channel Offset Element] is - * present when switching to a 40 MHz channel. It may be - * present when switching to a 20 MHz channel (in which - * case the secondary channel offset is set to SCN). - */ - secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; - } - - switch (secondary_channel_offset) { - default: - /* secondary_channel_offset was present but is invalid */ - case IEEE80211_HT_PARAM_CHA_SEC_NONE: - cfg80211_chandef_create(&new_chandef, new_chan, - NL80211_CHAN_HT20); - break; - case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: - cfg80211_chandef_create(&new_chandef, new_chan, - NL80211_CHAN_HT40PLUS); - break; - case IEEE80211_HT_PARAM_CHA_SEC_BELOW: - cfg80211_chandef_create(&new_chandef, new_chan, - NL80211_CHAN_HT40MINUS); - break; - case -1: - cfg80211_chandef_create(&new_chandef, new_chan, - NL80211_CHAN_NO_HT); - /* keep width for 5/10 MHz channels */ - switch (sdata->vif.bss_conf.chandef.width) { - case NL80211_CHAN_WIDTH_5: - case NL80211_CHAN_WIDTH_10: - new_chandef.width = sdata->vif.bss_conf.chandef.width; - break; - default: - break; - } - break; - } - - if (wide_bw_chansw_ie) { - new_vht_chandef.chan = new_chan; - new_vht_chandef.center_freq1 = - ieee80211_channel_to_frequency( - wide_bw_chansw_ie->new_center_freq_seg0, - new_band); - - switch (wide_bw_chansw_ie->new_channel_width) { - default: - /* hmmm, ignore VHT and use HT if present */ - case IEEE80211_VHT_CHANWIDTH_USE_HT: - new_vht_chandef.chan = NULL; - break; - case IEEE80211_VHT_CHANWIDTH_80MHZ: - new_vht_chandef.width = NL80211_CHAN_WIDTH_80; - break; - case IEEE80211_VHT_CHANWIDTH_160MHZ: - new_vht_chandef.width = NL80211_CHAN_WIDTH_160; - break; - case IEEE80211_VHT_CHANWIDTH_80P80MHZ: - /* field is otherwise reserved */ - new_vht_chandef.center_freq2 = - ieee80211_channel_to_frequency( - wide_bw_chansw_ie->new_center_freq_seg1, - new_band); - new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80; - break; - } - if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ && - new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80) - chandef_downgrade(&new_vht_chandef); - if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ && - new_vht_chandef.width == NL80211_CHAN_WIDTH_160) - chandef_downgrade(&new_vht_chandef); - if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ && - new_vht_chandef.width > NL80211_CHAN_WIDTH_20) - chandef_downgrade(&new_vht_chandef); - } - - /* if VHT data is there validate & use it */ - if (new_vht_chandef.chan) { - if (!cfg80211_chandef_compatible(&new_vht_chandef, - &new_chandef)) { - sdata_info(sdata, - "AP %pM CSA has inconsistent channel data, disconnecting\n", - ifmgd->associated->bssid); - ieee80211_queue_work(&local->hw, - &ifmgd->csa_connection_drop_work); - return; - } - new_chandef = new_vht_chandef; - } if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef, IEEE80211_CHAN_DISABLED)) { sdata_info(sdata, "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", - ifmgd->associated->bssid, new_freq, + ifmgd->associated->bssid, + new_chandef.chan->center_freq, new_chandef.width, new_chandef.center_freq1, new_chandef.center_freq2); ieee80211_queue_work(&local->hw, @@ -3856,7 +3649,7 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, return ret; while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) { - ifmgd->flags |= chandef_downgrade(&chandef); + ifmgd->flags |= ieee80211_chandef_downgrade(&chandef); ret = ieee80211_vif_use_channel(sdata, &chandef, IEEE80211_CHANCTX_SHARED); } diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c index 578eea3..921597e 100644 --- a/net/mac80211/spectmgmt.c +++ b/net/mac80211/spectmgmt.c @@ -21,6 +21,168 @@ #include "sta_info.h" #include "wme.h" +int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata, + struct ieee802_11_elems *elems, bool beacon, + enum ieee80211_band current_band, + u32 sta_flags, u8 *bssid, u8 *count, u8 *mode, + struct cfg80211_chan_def *new_chandef) +{ + enum ieee80211_band new_band; + int new_freq; + u8 new_chan_no; + struct ieee80211_channel *new_chan; + struct cfg80211_chan_def new_vht_chandef = {}; + const struct ieee80211_sec_chan_offs_ie *sec_chan_offs; + const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie; + const struct ieee80211_ht_operation *ht_oper; + int secondary_channel_offset = -1; + + sec_chan_offs = elems->sec_chan_offs; + wide_bw_chansw_ie = elems->wide_bw_chansw_ie; + ht_oper = elems->ht_operation; + + if (sta_flags & (IEEE80211_STA_DISABLE_HT | + IEEE80211_STA_DISABLE_40MHZ)) { + sec_chan_offs = NULL; + wide_bw_chansw_ie = NULL; + /* only used for bandwidth here */ + ht_oper = NULL; + } + + if (sta_flags & IEEE80211_STA_DISABLE_VHT) + wide_bw_chansw_ie = NULL; + + if (elems->ext_chansw_ie) { + if (!ieee80211_operating_class_to_band( + elems->ext_chansw_ie->new_operating_class, + &new_band)) { + sdata_info(sdata, + "cannot understand ECSA IE operating class %d, disconnecting\n", + elems->ext_chansw_ie->new_operating_class); + return -EINVAL; + } + new_chan_no = elems->ext_chansw_ie->new_ch_num; + *count = elems->ext_chansw_ie->count; + *mode = elems->ext_chansw_ie->mode; + } else if (elems->ch_switch_ie) { + new_band = current_band; + new_chan_no = elems->ch_switch_ie->new_ch_num; + *count = elems->ch_switch_ie->count; + *mode = elems->ch_switch_ie->mode; + } else { + /* nothing here we understand */ + return 1; + } + + new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band); + new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq); + if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) { + sdata_info(sdata, + "BSS %pM switches to unsupported channel (%d MHz), disconnecting\n", + bssid, new_freq); + return -EINVAL; + } + + if (!beacon && sec_chan_offs) { + secondary_channel_offset = sec_chan_offs->sec_chan_offs; + } else if (beacon && ht_oper) { + secondary_channel_offset = + ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET; + } else if (!(sta_flags & IEEE80211_STA_DISABLE_HT)) { + /* If it's not a beacon, HT is enabled and the IE not present, + * it's 20 MHz, 802.11-2012 8.5.2.6: + * This element [the Secondary Channel Offset Element] is + * present when switching to a 40 MHz channel. It may be + * present when switching to a 20 MHz channel (in which + * case the secondary channel offset is set to SCN). + */ + secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; + } + + switch (secondary_channel_offset) { + default: + /* secondary_channel_offset was present but is invalid */ + case IEEE80211_HT_PARAM_CHA_SEC_NONE: + cfg80211_chandef_create(new_chandef, new_chan, + NL80211_CHAN_HT20); + break; + case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: + cfg80211_chandef_create(new_chandef, new_chan, + NL80211_CHAN_HT40PLUS); + break; + case IEEE80211_HT_PARAM_CHA_SEC_BELOW: + cfg80211_chandef_create(new_chandef, new_chan, + NL80211_CHAN_HT40MINUS); + break; + case -1: + cfg80211_chandef_create(new_chandef, new_chan, + NL80211_CHAN_NO_HT); + /* keep width for 5/10 MHz channels */ + switch (sdata->vif.bss_conf.chandef.width) { + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + new_chandef->width = sdata->vif.bss_conf.chandef.width; + break; + default: + break; + } + break; + } + + if (wide_bw_chansw_ie) { + new_vht_chandef.chan = new_chan; + new_vht_chandef.center_freq1 = + ieee80211_channel_to_frequency( + wide_bw_chansw_ie->new_center_freq_seg0, + new_band); + + switch (wide_bw_chansw_ie->new_channel_width) { + default: + /* hmmm, ignore VHT and use HT if present */ + case IEEE80211_VHT_CHANWIDTH_USE_HT: + new_vht_chandef.chan = NULL; + break; + case IEEE80211_VHT_CHANWIDTH_80MHZ: + new_vht_chandef.width = NL80211_CHAN_WIDTH_80; + break; + case IEEE80211_VHT_CHANWIDTH_160MHZ: + new_vht_chandef.width = NL80211_CHAN_WIDTH_160; + break; + case IEEE80211_VHT_CHANWIDTH_80P80MHZ: + /* field is otherwise reserved */ + new_vht_chandef.center_freq2 = + ieee80211_channel_to_frequency( + wide_bw_chansw_ie->new_center_freq_seg1, + new_band); + new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80; + break; + } + if (sta_flags & IEEE80211_STA_DISABLE_80P80MHZ && + new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80) + ieee80211_chandef_downgrade(&new_vht_chandef); + if (sta_flags & IEEE80211_STA_DISABLE_160MHZ && + new_vht_chandef.width == NL80211_CHAN_WIDTH_160) + ieee80211_chandef_downgrade(&new_vht_chandef); + if (sta_flags & IEEE80211_STA_DISABLE_40MHZ && + new_vht_chandef.width > NL80211_CHAN_WIDTH_20) + ieee80211_chandef_downgrade(&new_vht_chandef); + } + + /* if VHT data is there validate & use it */ + if (new_vht_chandef.chan) { + if (!cfg80211_chandef_compatible(&new_vht_chandef, + new_chandef)) { + sdata_info(sdata, + "BSS %pM: CSA has inconsistent channel data, disconnecting\n", + bssid); + return -EINVAL; + } + *new_chandef = new_vht_chandef; + } + + return 0; +} + static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata, struct ieee80211_msrment_ie *request_ie, const u8 *da, const u8 *bssid, diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 75a1685..3c8283b 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2292,3 +2292,63 @@ void ieee80211_radar_detected(struct ieee80211_hw *hw) ieee80211_queue_work(hw, &local->radar_detected_work); } EXPORT_SYMBOL(ieee80211_radar_detected); + +u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) +{ + u32 ret; + int tmp; + + switch (c->width) { + case NL80211_CHAN_WIDTH_20: + c->width = NL80211_CHAN_WIDTH_20_NOHT; + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_40: + c->width = NL80211_CHAN_WIDTH_20; + c->center_freq1 = c->chan->center_freq; + ret = IEEE80211_STA_DISABLE_40MHZ | + IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_80: + tmp = (30 + c->chan->center_freq - c->center_freq1)/20; + /* n_P40 */ + tmp /= 2; + /* freq_P40 */ + c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; + c->width = NL80211_CHAN_WIDTH_40; + ret = IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_80P80: + c->center_freq2 = 0; + c->width = NL80211_CHAN_WIDTH_80; + ret = IEEE80211_STA_DISABLE_80P80MHZ | + IEEE80211_STA_DISABLE_160MHZ; + break; + case NL80211_CHAN_WIDTH_160: + /* n_P20 */ + tmp = (70 + c->chan->center_freq - c->center_freq1)/20; + /* n_P80 */ + tmp /= 4; + c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; + c->width = NL80211_CHAN_WIDTH_80; + ret = IEEE80211_STA_DISABLE_80P80MHZ | + IEEE80211_STA_DISABLE_160MHZ; + break; + default: + case NL80211_CHAN_WIDTH_20_NOHT: + WARN_ON_ONCE(1); + c->width = NL80211_CHAN_WIDTH_20_NOHT; + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + WARN_ON_ONCE(1); + /* keep c->width */ + ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; + break; + } + + WARN_ON_ONCE(!cfg80211_chandef_valid(c)); + + return ret; +} -- cgit v0.10.2 From 871a4180b8b62dbed54cd203c33bdab7fce24e6f Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:30 +0200 Subject: mac80211: split off ibss disconnect IBSS CSA will require to disconnect if a channel switch fails, but mac80211 should search and re-connect after this disconnect. To allow such usage, split off the ibss disconnect process in a separate function which only performs the disconnect without overwriting nl80211-supplied parameters. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index a12afe7..0c3ec08 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -499,6 +499,96 @@ ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata, const u8 *bssid, return ieee80211_ibss_finish_sta(sta); } +static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_local *local = sdata->local; + int active = 0; + struct sta_info *sta; + + sdata_assert_lock(sdata); + + rcu_read_lock(); + + list_for_each_entry_rcu(sta, &local->sta_list, list) { + if (sta->sdata == sdata && + time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, + jiffies)) { + active++; + break; + } + } + + rcu_read_unlock(); + + return active; +} + +static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + struct ieee80211_local *local = sdata->local; + struct cfg80211_bss *cbss; + struct beacon_data *presp; + struct sta_info *sta; + int active_ibss; + u16 capability; + + active_ibss = ieee80211_sta_active_ibss(sdata); + + if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { + capability = WLAN_CAPABILITY_IBSS; + + if (ifibss->privacy) + capability |= WLAN_CAPABILITY_PRIVACY; + + cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, + ifibss->bssid, ifibss->ssid, + ifibss->ssid_len, WLAN_CAPABILITY_IBSS | + WLAN_CAPABILITY_PRIVACY, + capability); + + if (cbss) { + cfg80211_unlink_bss(local->hw.wiphy, cbss); + cfg80211_put_bss(sdata->local->hw.wiphy, cbss); + } + } + + ifibss->state = IEEE80211_IBSS_MLME_SEARCH; + + sta_info_flush(sdata); + + spin_lock_bh(&ifibss->incomplete_lock); + while (!list_empty(&ifibss->incomplete_stations)) { + sta = list_first_entry(&ifibss->incomplete_stations, + struct sta_info, list); + list_del(&sta->list); + spin_unlock_bh(&ifibss->incomplete_lock); + + sta_info_free(local, sta); + spin_lock_bh(&ifibss->incomplete_lock); + } + spin_unlock_bh(&ifibss->incomplete_lock); + + netif_carrier_off(sdata->dev); + + sdata->vif.bss_conf.ibss_joined = false; + sdata->vif.bss_conf.ibss_creator = false; + sdata->vif.bss_conf.enable_beacon = false; + sdata->vif.bss_conf.ssid_len = 0; + + /* remove beacon */ + presp = rcu_dereference_protected(ifibss->presp, + lockdep_is_held(&sdata->wdev.mtx)); + RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); + if (presp) + kfree_rcu(presp, rcu_head); + + clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | + BSS_CHANGED_IBSS); + ieee80211_vif_release_channel(sdata); +} + static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) @@ -775,30 +865,6 @@ void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata, ieee80211_queue_work(&local->hw, &sdata->work); } -static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) -{ - struct ieee80211_local *local = sdata->local; - int active = 0; - struct sta_info *sta; - - sdata_assert_lock(sdata); - - rcu_read_lock(); - - list_for_each_entry_rcu(sta, &local->sta_list, list) { - if (sta->sdata == sdata && - time_after(sta->last_rx + IEEE80211_IBSS_MERGE_INTERVAL, - jiffies)) { - active++; - break; - } - } - - rcu_read_unlock(); - - return active; -} - static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) { struct ieee80211_local *local = sdata->local; @@ -1265,73 +1331,19 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata) { struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; - struct ieee80211_local *local = sdata->local; - struct cfg80211_bss *cbss; - u16 capability; - int active_ibss; - struct sta_info *sta; - struct beacon_data *presp; - - active_ibss = ieee80211_sta_active_ibss(sdata); - - if (!active_ibss && !is_zero_ether_addr(ifibss->bssid)) { - capability = WLAN_CAPABILITY_IBSS; - - if (ifibss->privacy) - capability |= WLAN_CAPABILITY_PRIVACY; - cbss = cfg80211_get_bss(local->hw.wiphy, ifibss->chandef.chan, - ifibss->bssid, ifibss->ssid, - ifibss->ssid_len, WLAN_CAPABILITY_IBSS | - WLAN_CAPABILITY_PRIVACY, - capability); - - if (cbss) { - cfg80211_unlink_bss(local->hw.wiphy, cbss); - cfg80211_put_bss(local->hw.wiphy, cbss); - } - } - - ifibss->state = IEEE80211_IBSS_MLME_SEARCH; - memset(ifibss->bssid, 0, ETH_ALEN); + ieee80211_ibss_disconnect(sdata); ifibss->ssid_len = 0; - - sta_info_flush(sdata); - - spin_lock_bh(&ifibss->incomplete_lock); - while (!list_empty(&ifibss->incomplete_stations)) { - sta = list_first_entry(&ifibss->incomplete_stations, - struct sta_info, list); - list_del(&sta->list); - spin_unlock_bh(&ifibss->incomplete_lock); - - sta_info_free(local, sta); - spin_lock_bh(&ifibss->incomplete_lock); - } - spin_unlock_bh(&ifibss->incomplete_lock); - - netif_carrier_off(sdata->dev); + memset(ifibss->bssid, 0, ETH_ALEN); /* remove beacon */ kfree(sdata->u.ibss.ie); - presp = rcu_dereference_protected(ifibss->presp, - lockdep_is_held(&sdata->wdev.mtx)); - RCU_INIT_POINTER(sdata->u.ibss.presp, NULL); /* on the next join, re-program HT parameters */ memset(&ifibss->ht_capa, 0, sizeof(ifibss->ht_capa)); memset(&ifibss->ht_capa_mask, 0, sizeof(ifibss->ht_capa_mask)); - sdata->vif.bss_conf.ibss_joined = false; - sdata->vif.bss_conf.ibss_creator = false; - sdata->vif.bss_conf.enable_beacon = false; - sdata->vif.bss_conf.ssid_len = 0; - clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); - ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | - BSS_CHANGED_IBSS); - ieee80211_vif_release_channel(sdata); synchronize_rcu(); - kfree(presp); skb_queue_purge(&sdata->skb_queue); -- cgit v0.10.2 From cd7760e62c2ac8581f050b2d36501d1a60beaf83 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:31 +0200 Subject: mac80211: add support for CSA in IBSS mode This function adds the channel switch announcement implementation for the IBSS code. It is triggered by userspace (mac80211/cfg) or by external channel switch announcement, which have to be adopted. Both CSAs in beacons and action frames are supported. As for AP mode, the channel switch is applied after some time. However in IBSS mode, the channel switch IEs are generated in the kernel. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 2e7855a..b455e72 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2865,30 +2865,38 @@ void ieee80211_csa_finalize_work(struct work_struct *work) if (!ieee80211_sdata_running(sdata)) return; - if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) - return; - sdata->radar_required = sdata->csa_radar_required; err = ieee80211_vif_change_channel(sdata, &local->csa_chandef, &changed); if (WARN_ON(err < 0)) return; - err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon); - if (err < 0) - return; + ieee80211_bss_info_change_notify(sdata, changed); - changed |= err; - kfree(sdata->u.ap.next_beacon); - sdata->u.ap.next_beacon = NULL; + switch (sdata->vif.type) { + case NL80211_IFTYPE_AP: + err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon); + if (err < 0) + return; + changed |= err; + kfree(sdata->u.ap.next_beacon); + sdata->u.ap.next_beacon = NULL; + + ieee80211_bss_info_change_notify(sdata, err); + break; + case NL80211_IFTYPE_ADHOC: + ieee80211_ibss_finish_csa(sdata); + break; + default: + WARN_ON(1); + return; + } sdata->vif.csa_active = false; ieee80211_wake_queues_by_reason(&sdata->local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); - ieee80211_bss_info_change_notify(sdata, changed); - cfg80211_ch_switch_notify(sdata->dev, &local->csa_chandef); } @@ -2936,20 +2944,56 @@ static int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, if (sdata->vif.csa_active) return -EBUSY; - /* only handle AP for now. */ switch (sdata->vif.type) { case NL80211_IFTYPE_AP: + sdata->csa_counter_offset_beacon = + params->counter_offset_beacon; + sdata->csa_counter_offset_presp = params->counter_offset_presp; + sdata->u.ap.next_beacon = + cfg80211_beacon_dup(¶ms->beacon_after); + if (!sdata->u.ap.next_beacon) + return -ENOMEM; + + err = ieee80211_assign_beacon(sdata, ¶ms->beacon_csa); + if (err < 0) { + kfree(sdata->u.ap.next_beacon); + return err; + } + break; + case NL80211_IFTYPE_ADHOC: + if (!sdata->vif.bss_conf.ibss_joined) + return -EINVAL; + + if (params->chandef.width != sdata->u.ibss.chandef.width) + return -EINVAL; + + switch (params->chandef.width) { + case NL80211_CHAN_WIDTH_40: + if (cfg80211_get_chandef_type(¶ms->chandef) != + cfg80211_get_chandef_type(&sdata->u.ibss.chandef)) + return -EINVAL; + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + case NL80211_CHAN_WIDTH_20_NOHT: + case NL80211_CHAN_WIDTH_20: + break; + default: + return -EINVAL; + } + + /* changes into another band are not supported */ + if (sdata->u.ibss.chandef.chan->band != + params->chandef.chan->band) + return -EINVAL; + + err = ieee80211_ibss_csa_beacon(sdata, params); + if (err < 0) + return err; break; default: return -EOPNOTSUPP; } - sdata->u.ap.next_beacon = cfg80211_beacon_dup(¶ms->beacon_after); - if (!sdata->u.ap.next_beacon) - return -ENOMEM; - - sdata->csa_counter_offset_beacon = params->counter_offset_beacon; - sdata->csa_counter_offset_presp = params->counter_offset_presp; sdata->csa_radar_required = params->radar_required; if (params->block_tx) @@ -2957,10 +3001,6 @@ static int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); - err = ieee80211_assign_beacon(sdata, ¶ms->beacon_csa); - if (err < 0) - return err; - local->csa_chandef = params->chandef; sdata->vif.csa_active = true; @@ -3014,7 +3054,8 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, need_offchan = true; if (!ieee80211_is_action(mgmt->frame_control) || mgmt->u.action.category == WLAN_CATEGORY_PUBLIC || - mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED) + mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED || + mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) break; rcu_read_lock(); sta = sta_info_get(sdata, mgmt->da); diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 0c3ec08..c004213 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -39,7 +39,8 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, const int beacon_int, const u32 basic_rates, const u16 capability, u64 tsf, struct cfg80211_chan_def *chandef, - bool *have_higher_than_11mbit) + bool *have_higher_than_11mbit, + struct cfg80211_csa_settings *csa_settings) { struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; struct ieee80211_local *local = sdata->local; @@ -59,6 +60,7 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, 2 + 8 /* max Supported Rates */ + 3 /* max DS params */ + 4 /* IBSS params */ + + 5 /* Channel Switch Announcement */ + 2 + (IEEE80211_MAX_SUPP_RATES - 8) + 2 + sizeof(struct ieee80211_ht_cap) + 2 + sizeof(struct ieee80211_ht_operation) + @@ -135,6 +137,16 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, *pos++ = 0; *pos++ = 0; + if (csa_settings) { + *pos++ = WLAN_EID_CHANNEL_SWITCH; + *pos++ = 3; + *pos++ = csa_settings->block_tx ? 1 : 0; + *pos++ = ieee80211_frequency_to_channel( + csa_settings->chandef.chan->center_freq); + sdata->csa_counter_offset_beacon = (pos - presp->head); + *pos++ = csa_settings->count; + } + /* put the remaining rates in WLAN_EID_EXT_SUPP_RATES */ if (rates_n > 8) { *pos++ = WLAN_EID_EXT_SUPP_RATES; @@ -276,7 +288,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, presp = ieee80211_ibss_build_presp(sdata, beacon_int, basic_rates, capability, tsf, &chandef, - &have_higher_than_11mbit); + &have_higher_than_11mbit, NULL); if (!presp) return; @@ -416,6 +428,109 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, tsf, false); } +int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, + struct cfg80211_csa_settings *csa_settings) +{ + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + struct beacon_data *presp, *old_presp; + struct cfg80211_bss *cbss; + const struct cfg80211_bss_ies *ies; + u16 capability; + u64 tsf; + int ret = 0; + + sdata_assert_lock(sdata); + + capability = WLAN_CAPABILITY_IBSS; + + if (ifibss->privacy) + capability |= WLAN_CAPABILITY_PRIVACY; + + cbss = cfg80211_get_bss(sdata->local->hw.wiphy, ifibss->chandef.chan, + ifibss->bssid, ifibss->ssid, + ifibss->ssid_len, WLAN_CAPABILITY_IBSS | + WLAN_CAPABILITY_PRIVACY, + capability); + + if (WARN_ON(!cbss)) { + ret = -EINVAL; + goto out; + } + + rcu_read_lock(); + ies = rcu_dereference(cbss->ies); + tsf = ies->tsf; + rcu_read_unlock(); + cfg80211_put_bss(sdata->local->hw.wiphy, cbss); + + old_presp = rcu_dereference_protected(ifibss->presp, + lockdep_is_held(&sdata->wdev.mtx)); + + presp = ieee80211_ibss_build_presp(sdata, + sdata->vif.bss_conf.beacon_int, + sdata->vif.bss_conf.basic_rates, + capability, tsf, &ifibss->chandef, + NULL, csa_settings); + if (!presp) { + ret = -ENOMEM; + goto out; + } + + rcu_assign_pointer(ifibss->presp, presp); + if (old_presp) + kfree_rcu(old_presp, rcu_head); + + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); + out: + return ret; +} + +int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + struct cfg80211_bss *cbss; + int err; + u16 capability; + + sdata_lock(sdata); + /* update cfg80211 bss information with the new channel */ + if (!is_zero_ether_addr(ifibss->bssid)) { + capability = WLAN_CAPABILITY_IBSS; + + if (ifibss->privacy) + capability |= WLAN_CAPABILITY_PRIVACY; + + cbss = cfg80211_get_bss(sdata->local->hw.wiphy, + ifibss->chandef.chan, + ifibss->bssid, ifibss->ssid, + ifibss->ssid_len, WLAN_CAPABILITY_IBSS | + WLAN_CAPABILITY_PRIVACY, + capability); + /* XXX: should not really modify cfg80211 data */ + if (cbss) { + cbss->channel = sdata->local->csa_chandef.chan; + cfg80211_put_bss(sdata->local->hw.wiphy, cbss); + } + } + + ifibss->chandef = sdata->local->csa_chandef; + + /* generate the beacon */ + err = ieee80211_ibss_csa_beacon(sdata, NULL); + sdata_unlock(sdata); + if (err < 0) + return err; + + return 0; +} + +void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + + cancel_work_sync(&ifibss->csa_connection_drop_work); +} + static struct sta_info *ieee80211_ibss_finish_sta(struct sta_info *sta) __acquires(RCU) { @@ -589,6 +704,204 @@ static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) ieee80211_vif_release_channel(sdata); } +static void ieee80211_csa_connection_drop_work(struct work_struct *work) +{ + struct ieee80211_sub_if_data *sdata = + container_of(work, struct ieee80211_sub_if_data, + u.ibss.csa_connection_drop_work); + + ieee80211_ibss_disconnect(sdata); + synchronize_rcu(); + skb_queue_purge(&sdata->skb_queue); + + /* trigger a scan to find another IBSS network to join */ + ieee80211_queue_work(&sdata->local->hw, &sdata->work); +} + +static bool +ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, + struct ieee802_11_elems *elems, + bool beacon) +{ + struct cfg80211_csa_settings params; + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + struct ieee80211_chanctx_conf *chanctx_conf; + struct ieee80211_chanctx *chanctx; + enum nl80211_channel_type ch_type; + int err, num_chanctx; + u32 sta_flags; + u8 mode; + + if (sdata->vif.csa_active) + return true; + + if (!sdata->vif.bss_conf.ibss_joined) + return false; + + sta_flags = IEEE80211_STA_DISABLE_VHT; + switch (ifibss->chandef.width) { + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + case NL80211_CHAN_WIDTH_20_NOHT: + sta_flags |= IEEE80211_STA_DISABLE_HT; + /* fall through */ + case NL80211_CHAN_WIDTH_20: + sta_flags |= IEEE80211_STA_DISABLE_40MHZ; + break; + default: + break; + } + + memset(¶ms, 0, sizeof(params)); + err = ieee80211_parse_ch_switch_ie(sdata, elems, beacon, + ifibss->chandef.chan->band, + sta_flags, ifibss->bssid, + ¶ms.count, &mode, + ¶ms.chandef); + + /* can't switch to destination channel, fail */ + if (err < 0) + goto disconnect; + + /* did not contain a CSA */ + if (err) + return false; + + if (ifibss->chandef.chan->band != params.chandef.chan->band) + goto disconnect; + + switch (ifibss->chandef.width) { + case NL80211_CHAN_WIDTH_20_NOHT: + case NL80211_CHAN_WIDTH_20: + case NL80211_CHAN_WIDTH_40: + /* keep our current HT mode (HT20/HT40+/HT40-), even if + * another mode has been announced. The mode is not adopted + * within the beacon while doing CSA and we should therefore + * keep the mode which we announce. + */ + ch_type = cfg80211_get_chandef_type(&ifibss->chandef); + cfg80211_chandef_create(¶ms.chandef, params.chandef.chan, + ch_type); + break; + case NL80211_CHAN_WIDTH_5: + case NL80211_CHAN_WIDTH_10: + if (params.chandef.width != ifibss->chandef.width) { + sdata_info(sdata, + "IBSS %pM received channel switch from incompatible channel width (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", + ifibss->bssid, + params.chandef.chan->center_freq, + params.chandef.width, + params.chandef.center_freq1, + params.chandef.center_freq2); + goto disconnect; + } + break; + default: + /* should not happen, sta_flags should prevent VHT modes. */ + WARN_ON(1); + goto disconnect; + } + + if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, ¶ms.chandef, + IEEE80211_CHAN_DISABLED)) { + sdata_info(sdata, + "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", + ifibss->bssid, + params.chandef.chan->center_freq, + params.chandef.width, + params.chandef.center_freq1, + params.chandef.center_freq2); + goto disconnect; + } + + err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, + ¶ms.chandef); + if (err < 0) + goto disconnect; + if (err) { + params.radar_required = true; + + /* TODO: IBSS-DFS not (yet) supported, disconnect. */ + goto disconnect; + } + + rcu_read_lock(); + chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); + if (!chanctx_conf) { + rcu_read_unlock(); + goto disconnect; + } + + /* don't handle for multi-VIF cases */ + chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); + if (chanctx->refcount > 1) { + rcu_read_unlock(); + goto disconnect; + } + num_chanctx = 0; + list_for_each_entry_rcu(chanctx, &sdata->local->chanctx_list, list) + num_chanctx++; + + if (num_chanctx > 1) { + rcu_read_unlock(); + goto disconnect; + } + rcu_read_unlock(); + + /* all checks done, now perform the channel switch. */ + ibss_dbg(sdata, + "received channel switch announcement to go to channel %d MHz\n", + params.chandef.chan->center_freq); + + params.block_tx = !!mode; + + ieee80211_ibss_csa_beacon(sdata, ¶ms); + sdata->csa_radar_required = params.radar_required; + + if (params.block_tx) + ieee80211_stop_queues_by_reason(&sdata->local->hw, + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); + + sdata->local->csa_chandef = params.chandef; + sdata->vif.csa_active = true; + + ieee80211_bss_info_change_notify(sdata, err); + drv_channel_switch_beacon(sdata, ¶ms.chandef); + + return true; +disconnect: + ibss_dbg(sdata, "Can't handle channel switch, disconnect\n"); + ieee80211_queue_work(&sdata->local->hw, + &ifibss->csa_connection_drop_work); + + return true; +} + +static void +ieee80211_rx_mgmt_spectrum_mgmt(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, size_t len, + struct ieee80211_rx_status *rx_status, + struct ieee802_11_elems *elems) +{ + int required_len; + + if (len < IEEE80211_MIN_ACTION_SIZE + 1) + return; + + /* CSA is the only action we handle for now */ + if (mgmt->u.action.u.measurement.action_code != + WLAN_ACTION_SPCT_CHL_SWITCH) + return; + + required_len = IEEE80211_MIN_ACTION_SIZE + + sizeof(mgmt->u.action.u.chan_switch); + if (len < required_len) + return; + + ieee80211_ibss_process_chanswitch(sdata, elems, false); +} + static void ieee80211_rx_mgmt_deauth_ibss(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) @@ -751,10 +1064,6 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, /* check if we need to merge IBSS */ - /* we use a fixed BSSID */ - if (sdata->u.ibss.fixed_bssid) - goto put_bss; - /* not an IBSS */ if (!(cbss->capability & WLAN_CAPABILITY_IBSS)) goto put_bss; @@ -770,10 +1079,18 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, sdata->u.ibss.ssid_len)) goto put_bss; + /* process channel switch */ + if (ieee80211_ibss_process_chanswitch(sdata, elems, true)) + goto put_bss; + /* same BSSID */ if (ether_addr_equal(cbss->bssid, sdata->u.ibss.bssid)) goto put_bss; + /* we use a fixed BSSID */ + if (sdata->u.ibss.fixed_bssid) + goto put_bss; + if (ieee80211_have_rx_timestamp(rx_status)) { /* time when timestamp field was received */ rx_timestamp = @@ -1142,6 +1459,8 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, struct ieee80211_rx_status *rx_status; struct ieee80211_mgmt *mgmt; u16 fc; + struct ieee802_11_elems elems; + int ies_len; rx_status = IEEE80211_SKB_RXCB(skb); mgmt = (struct ieee80211_mgmt *) skb->data; @@ -1167,6 +1486,27 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, case IEEE80211_STYPE_DEAUTH: ieee80211_rx_mgmt_deauth_ibss(sdata, mgmt, skb->len); break; + case IEEE80211_STYPE_ACTION: + switch (mgmt->u.action.category) { + case WLAN_CATEGORY_SPECTRUM_MGMT: + ies_len = skb->len - + offsetof(struct ieee80211_mgmt, + u.action.u.chan_switch.variable); + + if (ies_len < 0) + break; + + ieee802_11_parse_elems( + mgmt->u.action.u.chan_switch.variable, + ies_len, true, &elems); + + if (elems.parse_error) + break; + + ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, + rx_status, &elems); + break; + } } mgmt_out: @@ -1233,6 +1573,8 @@ void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata) (unsigned long) sdata); INIT_LIST_HEAD(&ifibss->incomplete_stations); spin_lock_init(&ifibss->incomplete_lock); + INIT_WORK(&ifibss->csa_connection_drop_work, + ieee80211_csa_connection_drop_work); } /* scan finished notification */ diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 7f0e6da..3a87c89 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -486,6 +486,7 @@ struct ieee80211_if_managed { struct ieee80211_if_ibss { struct timer_list timer; + struct work_struct csa_connection_drop_work; unsigned long last_scan_completed; @@ -1329,6 +1330,10 @@ int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata); void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata); void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb); +int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, + struct cfg80211_csa_settings *csa_settings); +int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata); +void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata); /* mesh code */ void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata); diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index fcecd63..e48f103 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -766,6 +766,10 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, if (sdata->vif.type == NL80211_IFTYPE_STATION) ieee80211_mgd_stop(sdata); + if (sdata->vif.type == NL80211_IFTYPE_ADHOC) + ieee80211_ibss_stop(sdata); + + /* * Remove all stations associated with this interface. * diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 54395d7..8e908e1 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2402,7 +2402,8 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) return RX_DROP_UNUSABLE; if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC && - mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED) + mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED && + mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT) return RX_DROP_UNUSABLE; if (!(status->rx_flags & IEEE80211_RX_RA_MATCH)) @@ -2566,31 +2567,46 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx) goto queue; case WLAN_CATEGORY_SPECTRUM_MGMT: - if (status->band != IEEE80211_BAND_5GHZ) - break; - - if (sdata->vif.type != NL80211_IFTYPE_STATION) - break; - /* verify action_code is present */ if (len < IEEE80211_MIN_ACTION_SIZE + 1) break; switch (mgmt->u.action.u.measurement.action_code) { case WLAN_ACTION_SPCT_MSR_REQ: + if (status->band != IEEE80211_BAND_5GHZ) + break; + if (len < (IEEE80211_MIN_ACTION_SIZE + sizeof(mgmt->u.action.u.measurement))) break; + + if (sdata->vif.type != NL80211_IFTYPE_STATION) + break; + ieee80211_process_measurement_req(sdata, mgmt, len); goto handled; - case WLAN_ACTION_SPCT_CHL_SWITCH: - if (sdata->vif.type != NL80211_IFTYPE_STATION) + case WLAN_ACTION_SPCT_CHL_SWITCH: { + u8 *bssid; + if (len < (IEEE80211_MIN_ACTION_SIZE + + sizeof(mgmt->u.action.u.chan_switch))) break; - if (!ether_addr_equal(mgmt->bssid, sdata->u.mgd.bssid)) + if (sdata->vif.type != NL80211_IFTYPE_STATION && + sdata->vif.type != NL80211_IFTYPE_ADHOC) + break; + + if (sdata->vif.type == NL80211_IFTYPE_STATION) + bssid = sdata->u.mgd.bssid; + else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) + bssid = sdata->u.ibss.bssid; + else + break; + + if (!ether_addr_equal(mgmt->bssid, bssid)) break; goto queue; + } } break; case WLAN_CATEGORY_SA_QUERY: diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 102ce8a..4fcbf63 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2357,15 +2357,31 @@ static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata, struct probe_resp *resp; int counter_offset_beacon = sdata->csa_counter_offset_beacon; int counter_offset_presp = sdata->csa_counter_offset_presp; + u8 *beacon_data; + size_t beacon_data_len; + + switch (sdata->vif.type) { + case NL80211_IFTYPE_AP: + beacon_data = beacon->tail; + beacon_data_len = beacon->tail_len; + break; + case NL80211_IFTYPE_ADHOC: + beacon_data = beacon->head; + beacon_data_len = beacon->head_len; + break; + default: + return; + } + if (WARN_ON(counter_offset_beacon >= beacon_data_len)) + return; /* warn if the driver did not check for/react to csa completeness */ - if (WARN_ON(((u8 *)beacon->tail)[counter_offset_beacon] == 0)) + if (WARN_ON(beacon_data[counter_offset_beacon] == 0)) return; - ((u8 *)beacon->tail)[counter_offset_beacon]--; + beacon_data[counter_offset_beacon]--; - if (sdata->vif.type == NL80211_IFTYPE_AP && - counter_offset_presp) { + if (sdata->vif.type == NL80211_IFTYPE_AP && counter_offset_presp) { rcu_read_lock(); resp = rcu_dereference(sdata->u.ap.probe_resp); @@ -2400,6 +2416,15 @@ bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) goto out; beacon_data = beacon->tail; beacon_data_len = beacon->tail_len; + } else if (vif->type == NL80211_IFTYPE_ADHOC) { + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + + beacon = rcu_dereference(ifibss->presp); + if (!beacon) + goto out; + + beacon_data = beacon->head; + beacon_data_len = beacon->head_len; } else { WARN_ON(1); goto out; @@ -2484,6 +2509,10 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, if (!presp) goto out; + if (sdata->vif.csa_active) + ieee80211_update_csa(sdata, presp); + + skb = dev_alloc_skb(local->tx_headroom + presp->head_len); if (!skb) goto out; -- cgit v0.10.2 From 9449410f3b30a27824aa02adec485e18b740b756 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:32 +0200 Subject: mac80211: send a CSA action frame when changing channel IBSS members may not immediately be able to send out their beacon when performing CSA, therefore also send a CSA action frame. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index c004213..5ea9b3a 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -428,6 +428,60 @@ static void ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, tsf, false); } +static int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, + struct cfg80211_csa_settings *csa_settings) +{ + struct sk_buff *skb; + struct ieee80211_mgmt *mgmt; + struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; + struct ieee80211_local *local = sdata->local; + int freq; + int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + + sizeof(mgmt->u.action.u.chan_switch); + u8 *pos; + + skb = dev_alloc_skb(local->tx_headroom + hdr_len + + 5 + /* channel switch announcement element */ + 3); /* secondary channel offset element */ + if (!skb) + return -1; + + skb_reserve(skb, local->tx_headroom); + mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); + memset(mgmt, 0, hdr_len); + mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | + IEEE80211_STYPE_ACTION); + + eth_broadcast_addr(mgmt->da); + memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); + memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); + mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; + mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; + pos = skb_put(skb, 5); + *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ + *pos++ = 3; /* IE length */ + *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ + freq = csa_settings->chandef.chan->center_freq; + *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ + *pos++ = csa_settings->count; /* count */ + + if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { + enum nl80211_channel_type ch_type; + + skb_put(skb, 3); + *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ + *pos++ = 1; /* IE length */ + ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); + if (ch_type == NL80211_CHAN_HT40PLUS) + *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; + else + *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; + } + + ieee80211_tx_skb(sdata, skb); + return 0; +} + int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, struct cfg80211_csa_settings *csa_settings) { @@ -480,6 +534,12 @@ int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata, if (old_presp) kfree_rcu(old_presp, rcu_head); + /* it might not send the beacon for a while. send an action frame + * immediately to announce the channel switch. + */ + if (csa_settings) + ieee80211_send_action_csa(sdata, csa_settings); + ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); out: return ret; -- cgit v0.10.2 From ee4bc9e75811d2c0cb5f2a2fc5b51ff037a01f47 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 28 Aug 2013 13:41:33 +0200 Subject: nl80211: enable IBSS support for channel switch announcements Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index af8d84a..ae61711 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5634,15 +5634,26 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1]; u8 radar_detect_width = 0; int err; + bool need_new_beacon = false; if (!rdev->ops->channel_switch || !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)) return -EOPNOTSUPP; - /* may add IBSS support later */ - if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) + switch (dev->ieee80211_ptr->iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + need_new_beacon = true; + + /* useless if AP is not running */ + if (!wdev->beacon_interval) + return -EINVAL; + break; + case NL80211_IFTYPE_ADHOC: + break; + default: return -EOPNOTSUPP; + } memset(¶ms, 0, sizeof(params)); @@ -5651,15 +5662,16 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) return -EINVAL; /* only important for AP, IBSS and mesh create IEs internally */ - if (!info->attrs[NL80211_ATTR_CSA_IES]) - return -EINVAL; - - /* useless if AP is not running */ - if (!wdev->beacon_interval) + if (need_new_beacon && + (!info->attrs[NL80211_ATTR_CSA_IES] || + !info->attrs[NL80211_ATTR_CSA_C_OFF_BEACON])) return -EINVAL; params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]); + if (!need_new_beacon) + goto skip_beacons; + err = nl80211_parse_beacon(info->attrs, ¶ms.beacon_after); if (err) return err; @@ -5699,6 +5711,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) return -EINVAL; } +skip_beacons: err = nl80211_parse_chandef(rdev, info, ¶ms.chandef); if (err) return err; @@ -5706,12 +5719,17 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info) if (!cfg80211_reg_can_beacon(&rdev->wiphy, ¶ms.chandef)) return -EINVAL; - err = cfg80211_chandef_dfs_required(wdev->wiphy, ¶ms.chandef); - if (err < 0) { - return err; - } else if (err) { - radar_detect_width = BIT(params.chandef.width); - params.radar_required = true; + /* DFS channels are only supported for AP/P2P GO ... for now. */ + if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP || + dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) { + err = cfg80211_chandef_dfs_required(wdev->wiphy, + ¶ms.chandef); + if (err < 0) { + return err; + } else if (err) { + radar_detect_width = BIT(params.chandef.width); + params.radar_required = true; + } } err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, @@ -10740,7 +10758,8 @@ void cfg80211_ch_switch_notify(struct net_device *dev, wdev_lock(wdev); if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && - wdev->iftype != NL80211_IFTYPE_P2P_GO)) + wdev->iftype != NL80211_IFTYPE_P2P_GO && + wdev->iftype != NL80211_IFTYPE_ADHOC)) goto out; wdev->channel = chandef->chan; -- cgit v0.10.2 From f364ef99a8e82ee27933d6a0cf5cc1f27e9f0df9 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Tue, 27 Aug 2013 12:40:15 +0300 Subject: mac80211: fix some snprintf misuses In some debugfs related functions snprintf was used while scnprintf should have been used instead. (blindly adding the return value of snprintf and supplying it to the next snprintf might result in buffer overflow when the input is too big) Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c index b0e32d6..5c090e4 100644 --- a/net/mac80211/debugfs.c +++ b/net/mac80211/debugfs.c @@ -103,54 +103,57 @@ static ssize_t hwflags_read(struct file *file, char __user *user_buf, if (!buf) return 0; - sf += snprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); + sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags); if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) - sf += snprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); + sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n"); if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS) - sf += snprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); + sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n"); if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) - sf += snprintf(buf + sf, mxln - sf, - "HOST_BCAST_PS_BUFFERING\n"); + sf += scnprintf(buf + sf, mxln - sf, + "HOST_BCAST_PS_BUFFERING\n"); if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE) - sf += snprintf(buf + sf, mxln - sf, - "2GHZ_SHORT_SLOT_INCAPABLE\n"); + sf += scnprintf(buf + sf, mxln - sf, + "2GHZ_SHORT_SLOT_INCAPABLE\n"); if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE) - sf += snprintf(buf + sf, mxln - sf, - "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); + sf += scnprintf(buf + sf, mxln - sf, + "2GHZ_SHORT_PREAMBLE_INCAPABLE\n"); if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) - sf += snprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); + sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n"); if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) - sf += snprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); + sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n"); if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC) - sf += snprintf(buf + sf, mxln - sf, "NEED_DTIM_BEFORE_ASSOC\n"); + sf += scnprintf(buf + sf, mxln - sf, + "NEED_DTIM_BEFORE_ASSOC\n"); if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT) - sf += snprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); + sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n"); if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) - sf += snprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); + sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); + sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n"); if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) - sf += snprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); + sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); + sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n"); if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE) - sf += snprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); + sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); + sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_STATIC_SMPS\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_SMPS\n"); + sf += scnprintf(buf + sf, mxln - sf, + "SUPPORTS_DYNAMIC_SMPS\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); + sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n"); if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) - sf += snprintf(buf + sf, mxln - sf, "REPORTS_TX_ACK_STATUS\n"); + sf += scnprintf(buf + sf, mxln - sf, + "REPORTS_TX_ACK_STATUS\n"); if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) - sf += snprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); + sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n"); if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK) - sf += snprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); + sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n"); if (local->hw.flags & IEEE80211_HW_AP_LINK_PS) - sf += snprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); + sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n"); if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW) - sf += snprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); + sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n"); rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf)); kfree(buf); diff --git a/net/mac80211/rc80211_pid_debugfs.c b/net/mac80211/rc80211_pid_debugfs.c index c97a065..6ff1346 100644 --- a/net/mac80211/rc80211_pid_debugfs.c +++ b/net/mac80211/rc80211_pid_debugfs.c @@ -167,29 +167,29 @@ static ssize_t rate_control_pid_events_read(struct file *file, char __user *buf, * provide large enough buffers. */ length = length < RC_PID_PRINT_BUF_SIZE ? length : RC_PID_PRINT_BUF_SIZE; - p = snprintf(pb, length, "%u %lu ", ev->id, ev->timestamp); + p = scnprintf(pb, length, "%u %lu ", ev->id, ev->timestamp); switch (ev->type) { case RC_PID_EVENT_TYPE_TX_STATUS: - p += snprintf(pb + p, length - p, "tx_status %u %u", - !(ev->data.flags & IEEE80211_TX_STAT_ACK), - ev->data.tx_status.status.rates[0].idx); + p += scnprintf(pb + p, length - p, "tx_status %u %u", + !(ev->data.flags & IEEE80211_TX_STAT_ACK), + ev->data.tx_status.status.rates[0].idx); break; case RC_PID_EVENT_TYPE_RATE_CHANGE: - p += snprintf(pb + p, length - p, "rate_change %d %d", - ev->data.index, ev->data.rate); + p += scnprintf(pb + p, length - p, "rate_change %d %d", + ev->data.index, ev->data.rate); break; case RC_PID_EVENT_TYPE_TX_RATE: - p += snprintf(pb + p, length - p, "tx_rate %d %d", - ev->data.index, ev->data.rate); + p += scnprintf(pb + p, length - p, "tx_rate %d %d", + ev->data.index, ev->data.rate); break; case RC_PID_EVENT_TYPE_PF_SAMPLE: - p += snprintf(pb + p, length - p, - "pf_sample %d %d %d %d", - ev->data.pf_sample, ev->data.prop_err, - ev->data.int_err, ev->data.der_err); + p += scnprintf(pb + p, length - p, + "pf_sample %d %d %d %d", + ev->data.pf_sample, ev->data.prop_err, + ev->data.int_err, ev->data.der_err); break; } - p += snprintf(pb + p, length - p, "\n"); + p += scnprintf(pb + p, length - p, "\n"); spin_unlock_irqrestore(&events->lock, status); diff --git a/net/wireless/debugfs.c b/net/wireless/debugfs.c index 90d0500..4541577 100644 --- a/net/wireless/debugfs.c +++ b/net/wireless/debugfs.c @@ -47,17 +47,19 @@ static int ht_print_chan(struct ieee80211_channel *chan, return 0; if (chan->flags & IEEE80211_CHAN_DISABLED) - return snprintf(buf + offset, - buf_size - offset, - "%d Disabled\n", - chan->center_freq); - - return snprintf(buf + offset, - buf_size - offset, - "%d HT40 %c%c\n", - chan->center_freq, - (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-', - (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? ' ' : '+'); + return scnprintf(buf + offset, + buf_size - offset, + "%d Disabled\n", + chan->center_freq); + + return scnprintf(buf + offset, + buf_size - offset, + "%d HT40 %c%c\n", + chan->center_freq, + (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? + ' ' : '-', + (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ? + ' ' : '+'); } static ssize_t ht40allow_map_read(struct file *file, -- cgit v0.10.2 From 5eb7906b47dcd906b3ffd811e689e0de4a6b1b6a Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Thu, 29 Aug 2013 15:03:14 +0300 Subject: ieee80211: fix vht cap definitions VHT_CAP_BEAMFORMER_ANTENNAS cap is actually defined in the draft as VHT_CAP_BEAMFORMEE_STS_MAX, and its size is 3 bits long. VHT_CAP_SOUNDING_DIMENSIONS is also 3 bits long. Fix the definitions and change the cap masking accordingly. Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index a5b598a..7c1e1eb 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -1391,8 +1391,8 @@ struct ieee80211_vht_operation { #define IEEE80211_VHT_CAP_RXSTBC_MASK 0x00000700 #define IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE 0x00000800 #define IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE 0x00001000 -#define IEEE80211_VHT_CAP_BEAMFORMER_ANTENNAS_MAX 0x00006000 -#define IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MAX 0x00030000 +#define IEEE80211_VHT_CAP_BEAMFORMEE_STS_MAX 0x0000e000 +#define IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MAX 0x00070000 #define IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE 0x00080000 #define IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE 0x00100000 #define IEEE80211_VHT_CAP_VHT_TXOP_PS 0x00200000 diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c index 97c2894..de01127 100644 --- a/net/mac80211/vht.c +++ b/net/mac80211/vht.c @@ -185,13 +185,13 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) { vht_cap->cap |= cap_info & (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | - IEEE80211_VHT_CAP_BEAMFORMER_ANTENNAS_MAX | IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MAX); } if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) vht_cap->cap |= cap_info & - IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE; + (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | + IEEE80211_VHT_CAP_BEAMFORMEE_STS_MAX); if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) vht_cap->cap |= cap_info & -- cgit v0.10.2 From 55fff50113daa178010a38e0dc27172f06d17b8e Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 19 Aug 2013 18:48:41 +0200 Subject: mac80211: add explicit IBSS driver operations This can be useful for drivers if they have any failure cases when joining an IBSS. Also move setting the queue parameters to before this new call, in case the new driver op needs them already. Signed-off-by: Johannes Berg diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 3411c59..8cff800 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2666,6 +2666,10 @@ enum ieee80211_roc_type { * zero using ieee80211_csa_is_complete() after the beacon has been * transmitted and then call ieee80211_csa_finish(). * + * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all + * information in bss_conf is set up and the beacon can be retrieved. A + * channel context is bound before this is called. + * @leave_ibss: Leave the IBSS again. */ struct ieee80211_ops { void (*tx)(struct ieee80211_hw *hw, @@ -2857,6 +2861,9 @@ struct ieee80211_ops { void (*channel_switch_beacon)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct cfg80211_chan_def *chandef); + + int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); + void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); }; /** diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index b3ea11f..5d03c47 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -1085,4 +1085,31 @@ drv_channel_switch_beacon(struct ieee80211_sub_if_data *sdata, } } +static inline int drv_join_ibss(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata) +{ + int ret = 0; + + might_sleep(); + check_sdata_in_driver(sdata); + + trace_drv_join_ibss(local, sdata, &sdata->vif.bss_conf); + if (local->ops->join_ibss) + ret = local->ops->join_ibss(&local->hw, &sdata->vif); + trace_drv_return_int(local, ret); + return ret; +} + +static inline void drv_leave_ibss(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata) +{ + might_sleep(); + check_sdata_in_driver(sdata); + + trace_drv_leave_ibss(local, sdata); + if (local->ops->leave_ibss) + local->ops->leave_ibss(&local->hw, &sdata->vif); + trace_drv_return_void(local); +} + #endif /* __MAC80211_DRIVER_OPS */ diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 5ea9b3a..21a0b88 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -229,6 +229,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, struct beacon_data *presp; enum nl80211_bss_scan_width scan_width; bool have_higher_than_11mbit; + int err; sdata_assert_lock(sdata); @@ -247,6 +248,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IBSS | BSS_CHANGED_BEACON_ENABLED); + drv_leave_ibss(local, sdata); } presp = rcu_dereference_protected(ifibss->presp, @@ -329,11 +331,26 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, else sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE; + ieee80211_set_wmm_default(sdata, true); + sdata->vif.bss_conf.ibss_joined = true; sdata->vif.bss_conf.ibss_creator = creator; - ieee80211_bss_info_change_notify(sdata, bss_change); - ieee80211_set_wmm_default(sdata, true); + err = drv_join_ibss(local, sdata); + if (err) { + sdata->vif.bss_conf.ibss_joined = false; + sdata->vif.bss_conf.ibss_creator = false; + sdata->vif.bss_conf.enable_beacon = false; + sdata->vif.bss_conf.ssid_len = 0; + RCU_INIT_POINTER(ifibss->presp, NULL); + kfree_rcu(presp, rcu_head); + ieee80211_vif_release_channel(sdata); + sdata_info(sdata, "Failed to join IBSS, driver failure: %d\n", + err); + return; + } + + ieee80211_bss_info_change_notify(sdata, bss_change); ifibss->state = IEEE80211_IBSS_MLME_JOINED; mod_timer(&ifibss->timer, @@ -761,6 +778,7 @@ static void ieee80211_ibss_disconnect(struct ieee80211_sub_if_data *sdata) clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, &sdata->state); ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_IBSS); + drv_leave_ibss(local, sdata); ieee80211_vif_release_channel(sdata); } diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index 1aba645..5d62c58 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -1475,6 +1475,41 @@ DEFINE_EVENT(local_sdata_evt, drv_ipv6_addr_change, ); #endif +TRACE_EVENT(drv_join_ibss, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, + struct ieee80211_bss_conf *info), + + TP_ARGS(local, sdata, info), + + TP_STRUCT__entry( + LOCAL_ENTRY + VIF_ENTRY + __field(u8, dtimper) + __field(u16, bcnint) + __dynamic_array(u8, ssid, info->ssid_len); + ), + + TP_fast_assign( + LOCAL_ASSIGN; + VIF_ASSIGN; + __entry->dtimper = info->dtim_period; + __entry->bcnint = info->beacon_int; + memcpy(__get_dynamic_array(ssid), info->ssid, info->ssid_len); + ), + + TP_printk( + LOCAL_PR_FMT VIF_PR_FMT, + LOCAL_PR_ARG, VIF_PR_ARG + ) +); + +DEFINE_EVENT(local_sdata_evt, drv_leave_ibss, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata), + TP_ARGS(local, sdata) +); + /* * Tracing for API calls that drivers call. */ -- cgit v0.10.2 From f0823475d57a1ece4fe1eafb1aef5c4fa79361aa Mon Sep 17 00:00:00 2001 From: Janusz Dziedzic Date: Tue, 17 Sep 2013 08:25:36 +0200 Subject: cfg80211: parse dfs region for internal regdb option Add support for parsing and setting the dfs region (ETSI, FCC, JP) when the internal regulatory database is used. Before this the DFS region was being ignored even if present on the used db.txt Signed-off-by: Janusz Dziedzic Reviewed-by: Luis R. Rodriguez Signed-off-by: Johannes Berg diff --git a/net/wireless/genregdb.awk b/net/wireless/genregdb.awk index 9392f8c..42ed274 100644 --- a/net/wireless/genregdb.awk +++ b/net/wireless/genregdb.awk @@ -46,6 +46,12 @@ BEGIN { sub(/:/, "", country) printf "static const struct ieee80211_regdomain regdom_%s = {\n", country printf "\t.alpha2 = \"%s\",\n", country + if ($NF ~ /DFS-ETSI/) + printf "\t.dfs_region = NL80211_DFS_ETSI,\n" + else if ($NF ~ /DFS-FCC/) + printf "\t.dfs_region = NL80211_DFS_FCC,\n" + else if ($NF ~ /DFS-JP/) + printf "\t.dfs_region = NL80211_DFS_JP,\n" printf "\t.reg_rules = {\n" active = 1 regdb = regdb "\t®dom_" country ",\n" -- cgit v0.10.2 From 15e230abaaa5a79feb25d1ef29b380e8b63aea0c Mon Sep 17 00:00:00 2001 From: Fred Zhou Date: Tue, 24 Sep 2013 10:33:01 +0800 Subject: mac80211: use exact-size allocation for authentication frame The authentication frame has a fixied size of 30 bytes (including header, algo num, trans seq num, and status) followed by a variable challenge text. Allocate using exact size, instead of over-allocation by sizeof(ieee80211_mgmt). Signed-off-by: Fred Zhou Signed-off-by: Johannes Berg diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3c8283b..1fb31f9 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1081,8 +1081,8 @@ void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt; int err; - skb = dev_alloc_skb(local->hw.extra_tx_headroom + - sizeof(*mgmt) + 6 + extra_len); + /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ + skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len); if (!skb) return; -- cgit v0.10.2 From 0cfcefef1945c6d3f24bce1c22937cfeae07eae8 Mon Sep 17 00:00:00 2001 From: Michal Kazior Date: Mon, 23 Sep 2013 15:34:38 +0200 Subject: mac80211: support reporting A-MSDU subframes individually Some devices may not be able to report A-MSDUs in single buffers. Drivers for such devices were forced to re-assemble A-MSDUs which would then be eventually disassembled by mac80211. This could lead to CPU cache thrashing and poor performance. Since A-MSDU has a single sequence number all subframes share it. This was in conflict with retransmission/duplication recovery (IEEE802.11-2012: 9.3.2.10). Patch introduces a new flag that is meant to be set for all individually reported A-MSDU subframes except the last one. This ensures the last_seq_ctrl is updated after the last subframe is processed. If an A-MSDU is actually a duplicate transmission all reported subframes will be properly discarded. Signed-off-by: Michal Kazior [johannes: add braces that were missing even before] Signed-off-by: Johannes Berg diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 8cff800..da80119 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -829,6 +829,15 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used + * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU + * subframes instead of a one huge frame for performance reasons. + * All, but the last MSDU from an A-MSDU should have this flag set. E.g. + * if an A-MSDU has 3 frames, the first 2 must have the flag set, while + * the 3rd (last) one must not have this flag set. The flag is used to + * deal with retransmission/duplication recovery properly since A-MSDU + * subframes share the same sequence number. Reported subframes can be + * either regular MSDU or singly A-MSDUs. Subframes must not be + * interleaved with other frames. */ enum mac80211_rx_flags { RX_FLAG_MMIC_ERROR = BIT(0), @@ -859,6 +868,7 @@ enum mac80211_rx_flags { RX_FLAG_STBC_MASK = BIT(26) | BIT(27), RX_FLAG_10MHZ = BIT(28), RX_FLAG_5MHZ = BIT(29), + RX_FLAG_AMSDU_MORE = BIT(30), }; #define RX_FLAG_STBC_SHIFT 26 diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 8e908e1..f0247a4 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -995,8 +995,9 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx) rx->sta->num_duplicates++; } return RX_DROP_UNUSABLE; - } else + } else if (!(status->flag & RX_FLAG_AMSDU_MORE)) { rx->sta->last_seq_ctrl[rx->seqno_idx] = hdr->seq_ctrl; + } } if (unlikely(rx->skb->len < 16)) { -- cgit v0.10.2 From 1f4ffde845861acfe2eeaf6a2a965c02eecaad08 Mon Sep 17 00:00:00 2001 From: Fred Zhou Date: Mon, 9 Sep 2013 23:03:41 +0800 Subject: mac80211: improve default WMM parameter setting Move the default setting for WMM parameters outside the for loop to avoid redundant assignment multiple times. Signed-off-by: Fred Zhou Signed-off-by: Johannes Berg diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 1fb31f9..550a688 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1004,14 +1004,21 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, */ enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION); - for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { - /* Set defaults according to 802.11-2007 Table 7-37 */ - aCWmax = 1023; - if (use_11b) - aCWmin = 31; - else - aCWmin = 15; + /* Set defaults according to 802.11-2007 Table 7-37 */ + aCWmax = 1023; + if (use_11b) + aCWmin = 31; + else + aCWmin = 15; + /* Confiure old 802.11b/g medium access rules. */ + qparam.cw_max = aCWmax; + qparam.cw_min = aCWmin; + qparam.txop = 0; + qparam.aifs = 2; + + for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { + /* Update if QoS is enabled. */ if (enable_qos) { switch (ac) { case IEEE80211_AC_BK: @@ -1047,12 +1054,6 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, qparam.aifs = 2; break; } - } else { - /* Confiure old 802.11b/g medium access rules. */ - qparam.cw_max = aCWmax; - qparam.cw_min = aCWmin; - qparam.txop = 0; - qparam.aifs = 2; } qparam.uapsd = false; -- cgit v0.10.2 From ff311bc11a7e2da95e1e17f99b7e4951c7060547 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Tue, 3 Sep 2013 19:43:18 +0200 Subject: nl80211: allow CAC only if no operation is going on A CAC should fail if it is triggered while the interface is already running. Signed-off-by: Simon Wunderlich Signed-off-by: Mathias Kretschmer Signed-off-by: Johannes Berg diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ae61711..2838206 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5591,6 +5591,9 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, if (err) return err; + if (netif_carrier_ok(dev)) + return -EBUSY; + if (wdev->cac_started) return -EBUSY; -- cgit v0.10.2 From 131a19bc924c32cecd014be7036686f2186b48ad Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 4 Mar 2013 20:54:46 +0100 Subject: regulatory: enable channels 52-64 and 100-144 for world roaming If allowed in a country, these channels typically require DFS so mark them as such. Channel 144 is a bit special, it's coming into use now to allow more VHT 80 channels, but world roaming with passive scanning is acceptable anyway. It seems fairly unlikely that it'll be used as the control channel for a VHT AP, but it needs to be present to allow a full VHT connection to an AP that uses it as one of the secondary channels. Also enable VHT 160 on these channels, and also for channels 36-48 to be able to use VHT 160 there. Signed-off-by: Johannes Berg diff --git a/net/wireless/reg.c b/net/wireless/reg.c index de06d5d..d62cb1e 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -172,11 +172,21 @@ static const struct ieee80211_regdomain world_regdom = { NL80211_RRF_NO_IBSS | NL80211_RRF_NO_OFDM), /* IEEE 802.11a, channel 36..48 */ - REG_RULE(5180-10, 5240+10, 80, 6, 20, + REG_RULE(5180-10, 5240+10, 160, 6, 20, NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS), - /* NB: 5260 MHz - 5700 MHz requires DFS */ + /* IEEE 802.11a, channel 52..64 - DFS required */ + REG_RULE(5260-10, 5320+10, 160, 6, 20, + NL80211_RRF_PASSIVE_SCAN | + NL80211_RRF_NO_IBSS | + NL80211_RRF_DFS), + + /* IEEE 802.11a, channel 100..144 - DFS required */ + REG_RULE(5500-10, 5720+10, 160, 6, 20, + NL80211_RRF_PASSIVE_SCAN | + NL80211_RRF_NO_IBSS | + NL80211_RRF_DFS), /* IEEE 802.11a, channel 149..165 */ REG_RULE(5745-10, 5825+10, 80, 6, 20, -- cgit v0.10.2 From c6ca5e28bc005f109b2772765c62b4d4ec35c954 Mon Sep 17 00:00:00 2001 From: cedric Voncken Date: Mon, 26 Aug 2013 14:04:52 +0200 Subject: cfg80211: vlan priority handling in WMM If the VLAN tci is set in skb->vlan_tci use the priority field to determine the WMM priority. Signed-off-by: cedric Voncken Signed-off-by: Johannes Berg diff --git a/net/wireless/util.c b/net/wireless/util.c index ce090c1..3c8be61 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "core.h" #include "rdev-ops.h" @@ -691,6 +692,7 @@ EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); unsigned int cfg80211_classify8021d(struct sk_buff *skb) { unsigned int dscp; + unsigned char vlan_priority; /* skb->priority values from 256->263 are magic values to * directly indicate a specific 802.1d priority. This is used @@ -700,6 +702,13 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb) if (skb->priority >= 256 && skb->priority <= 263) return skb->priority - 256; + if (vlan_tx_tag_present(skb)) { + vlan_priority = (vlan_tx_tag_get(skb) & VLAN_PRIO_MASK) + >> VLAN_PRIO_SHIFT; + if (vlan_priority > 0) + return vlan_priority; + } + switch (skb->protocol) { case htons(ETH_P_IP): dscp = ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; -- cgit v0.10.2 From 7578d57520f51093f590d68e16965e2714e69747 Mon Sep 17 00:00:00 2001 From: Arik Nemtsov Date: Sun, 1 Sep 2013 17:15:51 +0300 Subject: mac80211: implement STA CSA for drivers using channel contexts Limit the current implementation to a single channel context used by a single vif, thereby avoiding multi-vif/channel complexities. Reuse the main function from AP CSA code, but move a portion out in order to fit the STA scenario. Add a new mac80211 HW flag so we don't break devices that don't support channel switch with channel-contexts. The new behavior will be opt-in. Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg diff --git a/include/net/mac80211.h b/include/net/mac80211.h index da80119..f386c48 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1502,6 +1502,11 @@ struct ieee80211_tx_control { * * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames * only, to allow getting TBTT of a DTIM beacon. + * + * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) + * for a single active channel while using channel contexts. When support + * is not enabled the default action is to disconnect when getting the + * CSA frame. */ enum ieee80211_hw_flags { IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, @@ -1532,6 +1537,7 @@ enum ieee80211_hw_flags { IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27, + IEEE80211_HW_CHANCTX_STA_CSA = 1<<28, }; /** diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index b455e72..ac28af7 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2871,6 +2871,11 @@ void ieee80211_csa_finalize_work(struct work_struct *work) if (WARN_ON(err < 0)) return; + if (!local->use_chanctx) { + local->_oper_chandef = local->csa_chandef; + ieee80211_hw_config(local, 0); + } + ieee80211_bss_info_change_notify(sdata, changed); switch (sdata->vif.type) { diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 3a4764b..03ba6b5 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -453,11 +453,6 @@ int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL; drv_change_chanctx(local, ctx, chanctx_changed); - if (!local->use_chanctx) { - local->_oper_chandef = *chandef; - ieee80211_hw_config(local, 0); - } - ieee80211_recalc_chanctx_chantype(local, ctx); ieee80211_recalc_smps_chanctx(local, ctx); ieee80211_recalc_radar_chanctx(local, ctx); diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 9fce0f49..91cc828 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -876,6 +876,8 @@ static void ieee80211_chswitch_work(struct work_struct *work) container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work); struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + u32 changed = 0; + int ret; if (!ieee80211_sdata_running(sdata)) return; @@ -884,24 +886,39 @@ static void ieee80211_chswitch_work(struct work_struct *work) if (!ifmgd->associated) goto out; - local->_oper_chandef = local->csa_chandef; + ret = ieee80211_vif_change_channel(sdata, &local->csa_chandef, + &changed); + if (ret) { + sdata_info(sdata, + "vif channel switch failed, disconnecting\n"); + ieee80211_queue_work(&sdata->local->hw, + &ifmgd->csa_connection_drop_work); + goto out; + } - if (!local->ops->channel_switch) { - /* call "hw_config" only if doing sw channel switch */ - ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); - } else { - /* update the device channel directly */ - local->hw.conf.chandef = local->_oper_chandef; + if (!local->use_chanctx) { + local->_oper_chandef = local->csa_chandef; + /* Call "hw_config" only if doing sw channel switch. + * Otherwise update the channel directly + */ + if (!local->ops->channel_switch) + ieee80211_hw_config(local, 0); + else + local->hw.conf.chandef = local->_oper_chandef; } /* XXX: shouldn't really modify cfg80211-owned data! */ - ifmgd->associated->channel = local->_oper_chandef.chan; + ifmgd->associated->channel = local->csa_chandef.chan; /* XXX: wait for a beacon first? */ ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); + + ieee80211_bss_info_change_notify(sdata, changed); + out: + sdata->vif.csa_active = false; ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; sdata_unlock(sdata); } @@ -983,17 +1000,28 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, } ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED; + sdata->vif.csa_active = true; + mutex_lock(&local->chanctx_mtx); if (local->use_chanctx) { - sdata_info(sdata, - "not handling channel switch with channel contexts\n"); - ieee80211_queue_work(&local->hw, - &ifmgd->csa_connection_drop_work); - return; + u32 num_chanctx = 0; + list_for_each_entry(chanctx, &local->chanctx_list, list) + num_chanctx++; + + if (num_chanctx > 1 || + !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) { + sdata_info(sdata, + "not handling chan-switch with channel contexts\n"); + ieee80211_queue_work(&local->hw, + &ifmgd->csa_connection_drop_work); + mutex_unlock(&local->chanctx_mtx); + return; + } } - mutex_lock(&local->chanctx_mtx); if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) { + ieee80211_queue_work(&local->hw, + &ifmgd->csa_connection_drop_work); mutex_unlock(&local->chanctx_mtx); return; } @@ -1955,6 +1983,7 @@ static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, true, frame_buf); ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; + sdata->vif.csa_active = false; ieee80211_wake_queues_by_reason(&sdata->local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); -- cgit v0.10.2