From 18a8365992a8041aa178ae9ad5f0d951d0457230 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 31 Mar 2009 12:12:05 +0200 Subject: cfg80211: introduce scan IE limit attribute This patch introduces a new attribute for a wiphy that tells userspace how long the information elements added to a probe request frame can be at most. It also updates the at76 to advertise that it cannot support that, and, for now until I can fix that, iwlwifi too. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index fbcbed6cad01..ee58a7873699 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -728,7 +728,18 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, return NULL; wiphy->privid = mac80211_wiphy_privid; - wiphy->max_scan_ssids = 4; + + if (!ops->hw_scan) { + /* For hw_scan, driver needs to set these up. */ + wiphy->max_scan_ssids = 4; + + /* we support a maximum of 32 rates in cfg80211 */ + wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN + - 2 - 32 /* SSID */ + - 4 - 32 /* (ext) supp rates */; + + } + /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - sizeof(struct cfg80211_bss); -- cgit v1.2.3 From de95a54b1aebe5592cae971ca5e5d9ec6a381a17 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 1 Apr 2009 11:58:36 +0200 Subject: mac80211: pass all probe request IEs to driver Instead of just passing the cfg80211-requested IEs, pass the locally generated ones as well. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 49 ++++++++++++++++++++++++++++++++++--------------- 1 file changed, 34 insertions(+), 15 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index ee58a7873699..b3bbe78821d9 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -729,22 +729,12 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, wiphy->privid = mac80211_wiphy_privid; - if (!ops->hw_scan) { - /* For hw_scan, driver needs to set these up. */ - wiphy->max_scan_ssids = 4; - - /* we support a maximum of 32 rates in cfg80211 */ - wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN - - 2 - 32 /* SSID */ - - 4 - 32 /* (ext) supp rates */; - - } - /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ wiphy->bss_priv_size = sizeof(struct ieee80211_bss) - sizeof(struct cfg80211_bss); local = wiphy_priv(wiphy); + local->hw.wiphy = wiphy; local->hw.priv = (char *)local + @@ -831,7 +821,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) enum ieee80211_band band; struct net_device *mdev; struct ieee80211_master_priv *mpriv; - int channels, i, j; + int channels, i, j, max_bitrates; /* * generic code guarantees at least one band, @@ -839,18 +829,23 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) * that hw.conf.channel is assigned */ channels = 0; + max_bitrates = 0; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { struct ieee80211_supported_band *sband; sband = local->hw.wiphy->bands[band]; - if (sband && !local->oper_channel) { + if (!sband) + continue; + if (!local->oper_channel) { /* init channel we're on */ local->hw.conf.channel = local->oper_channel = local->scan_channel = &sband->channels[0]; } - if (sband) - channels += sband->n_channels; + channels += sband->n_channels; + + if (max_bitrates < sband->n_bitrates) + max_bitrates = sband->n_bitrates; } local->int_scan_req.n_channels = channels; @@ -870,6 +865,30 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; + /* + * Calculate scan IE length -- we need this to alloc + * memory and to subtract from the driver limit. It + * includes the (extended) supported rates and HT + * information -- SSID is the driver's responsibility. + */ + local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ + + if (!local->ops->hw_scan) { + /* For hw_scan, driver needs to set these up. */ + local->hw.wiphy->max_scan_ssids = 4; + local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; + } + + /* + * If the driver supports any scan IEs, then assume the + * limit includes the IEs mac80211 will add, otherwise + * leave it at zero and let the driver sort it out; we + * still pass our IEs to the driver but userspace will + * not be allowed to in that case. + */ + if (local->hw.wiphy->max_scan_ie_len) + local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; + result = wiphy_register(local->hw.wiphy); if (result < 0) goto fail_wiphy_register; -- cgit v1.2.3 From 5ef2d41afb7fce2315d12a8aaebe0c9f1b50755b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 31 Mar 2009 12:12:07 +0200 Subject: mac80211: include HT capabilities in probe request Include the HT capabilities in the probe request frame. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index b3bbe78821d9..679b3a14f11f 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -822,6 +822,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) struct net_device *mdev; struct ieee80211_master_priv *mpriv; int channels, i, j, max_bitrates; + bool supp_ht; /* * generic code guarantees at least one band, @@ -830,6 +831,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) */ channels = 0; max_bitrates = 0; + supp_ht = false; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { struct ieee80211_supported_band *sband; @@ -846,6 +848,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (max_bitrates < sband->n_bitrates) max_bitrates = sband->n_bitrates; + supp_ht = supp_ht || sband->ht_cap.ht_supported; } local->int_scan_req.n_channels = channels; @@ -872,6 +875,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) * information -- SSID is the driver's responsibility. */ local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ + if (supp_ht) + local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); if (!local->ops->hw_scan) { /* For hw_scan, driver needs to set these up. */ -- cgit v1.2.3 From 25e47c18ac4d8ad09c2ed4b99c1dbbcb7e3d2c51 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 2 Apr 2009 20:14:06 +0200 Subject: cfg80211: add cipher capabilities This adds the necessary code and fields to let drivers specify their cipher capabilities and exports them to userspace. Also update mac80211 to export the ciphers it has. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 679b3a14f11f..c1145be72da4 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -823,6 +823,15 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) struct ieee80211_master_priv *mpriv; int channels, i, j, max_bitrates; bool supp_ht; + static const u32 cipher_suites[] = { + WLAN_CIPHER_SUITE_WEP40, + WLAN_CIPHER_SUITE_WEP104, + WLAN_CIPHER_SUITE_TKIP, + WLAN_CIPHER_SUITE_CCMP, + + /* keep last -- depends on hw flags! */ + WLAN_CIPHER_SUITE_AES_CMAC + }; /* * generic code guarantees at least one band, @@ -894,6 +903,11 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (local->hw.wiphy->max_scan_ie_len) local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; + local->hw.wiphy->cipher_suites = cipher_suites; + local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); + if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) + local->hw.wiphy->n_cipher_suites--; + result = wiphy_register(local->hw.wiphy); if (result < 0) goto fail_wiphy_register; -- cgit v1.2.3 From f2753ddbadb0873a98421415882318251bbd9eaa Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 14 Apr 2009 10:09:24 +0200 Subject: mac80211: add hardware restart function Some hardware defects may require the hardware to be re-initialised completely from scratch. Drivers would need much information (for instance the current MAC address, crypto keys, beaconing information, etc.) stored duplicated from mac80211 to be able to do this, so let mac80211 help them. The new ieee80211_restart_hw() function requires the same code as resuming, so move that code into a new ieee80211_reconfig() function in util.c and leave only the suspend code in pm.c. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index c1145be72da4..80c0e28bf549 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -696,6 +696,28 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) } EXPORT_SYMBOL(ieee80211_tx_status); +static void ieee80211_restart_work(struct work_struct *work) +{ + struct ieee80211_local *local = + container_of(work, struct ieee80211_local, restart_work); + + rtnl_lock(); + ieee80211_reconfig(local); + rtnl_unlock(); +} + +void ieee80211_restart_hw(struct ieee80211_hw *hw) +{ + struct ieee80211_local *local = hw_to_local(hw); + + /* use this reason, __ieee80211_resume will unblock it */ + ieee80211_stop_queues_by_reason(hw, + IEEE80211_QUEUE_STOP_REASON_SUSPEND); + + schedule_work(&local->restart_work); +} +EXPORT_SYMBOL(ieee80211_restart_hw); + struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, const struct ieee80211_ops *ops) { @@ -768,6 +790,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); + INIT_WORK(&local->restart_work, ieee80211_restart_work); + INIT_WORK(&local->dynamic_ps_enable_work, ieee80211_dynamic_ps_enable_work); INIT_WORK(&local->dynamic_ps_disable_work, -- cgit v1.2.3 From 10f644a47b76d3e61b98f2d02ce9690b94c51ee5 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 16 Apr 2009 13:17:25 +0200 Subject: mac80211: disable powersave if pm_qos asks for low latency When an application asks for a latency lower than the beacon interval there's nothing we can do -- we need to stay awake and not have the AP buffer frames for us. Add code to automatically calculate this constraint in mac80211 so drivers need not concern themselves with it. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 80c0e28bf549..049ce8639806 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include @@ -1038,25 +1039,38 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) } } + local->network_latency_notifier.notifier_call = + ieee80211_max_network_latency; + result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, + &local->network_latency_notifier); + + if (result) { + rtnl_lock(); + goto fail_pm_qos; + } + return 0; -fail_wep: + fail_pm_qos: + ieee80211_led_exit(local); + ieee80211_remove_interfaces(local); + fail_wep: rate_control_deinitialize(local); -fail_rate: + fail_rate: unregister_netdevice(local->mdev); local->mdev = NULL; -fail_dev: + fail_dev: rtnl_unlock(); sta_info_stop(local); -fail_sta_info: + fail_sta_info: debugfs_hw_del(local); destroy_workqueue(local->hw.workqueue); -fail_workqueue: + fail_workqueue: if (local->mdev) free_netdev(local->mdev); -fail_mdev_alloc: + fail_mdev_alloc: wiphy_unregister(local->hw.wiphy); -fail_wiphy_register: + fail_wiphy_register: kfree(local->int_scan_req.channels); return result; } @@ -1069,6 +1083,9 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw) tasklet_kill(&local->tx_pending_tasklet); tasklet_kill(&local->tasklet); + pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, + &local->network_latency_notifier); + rtnl_lock(); /* -- cgit v1.2.3 From af8cdcd828ad751fae8e6cbfe94eef9f2f23b14b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sun, 19 Apr 2009 21:25:43 +0200 Subject: mac80211: convert to cfg80211 IBSS API This converts mac80211 to the new cfg80211 IBSS API, the wext handling functions are called where appropriate. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 049ce8639806..d26fc399285e 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -209,7 +209,7 @@ int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) !!rcu_dereference(sdata->u.ap.beacon); break; case NL80211_IFTYPE_ADHOC: - conf.enable_beacon = !!sdata->u.ibss.probe_resp; + conf.enable_beacon = !!sdata->u.ibss.presp; break; case NL80211_IFTYPE_MESH_POINT: conf.enable_beacon = true; -- cgit v1.2.3 From b9a5f8cab751d362f7c2d94899ca788c22fcd1ef Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Mon, 20 Apr 2009 18:39:05 +0200 Subject: nl80211: Add set/get for frag/rts threshold and retry limits Add new nl80211 attributes that can be used with NL80211_CMD_SET_WIPHY and NL80211_CMD_GET_WIPHY to manage fragmentation/RTS threshold and retry limits. Since these values are stored in struct wiphy, remove the local copy from mac80211 where feasible (frag & rts threshold). The retry limits are currently needed in struct ieee80211_conf, but these could be eventually removed since the driver should have access to the values in struct wiphy. Signed-off-by: Jouni Malinen Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index d26fc399285e..5320e08434ac 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -776,10 +776,8 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, /* set up some defaults */ local->hw.queues = 1; local->hw.max_rates = 1; - local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; - local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; - local->hw.conf.long_frame_max_tx_count = 4; - local->hw.conf.short_frame_max_tx_count = 7; + local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; + local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; local->hw.conf.radio_enabled = true; INIT_LIST_HEAD(&local->interfaces); -- cgit v1.2.3 From f3b85252f081581a8f257545ed748062dce7798b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Apr 2009 16:01:47 +0200 Subject: mac80211: fix scan races and rework scanning There are some places marked /* XXX maybe racy? */ and they really are racy because there's no locking. This patch reworks much of the scan code, and introduces proper locking for the scan request as well as the internal scanning (which is necessary for IBSS/managed modes). Helper functions are added to call the scanning code whenever necessary. The scan deferring is changed to simply queue the scanning work instead of trying to start the scan in place, the scanning work will then take care of the rest. Also, currently when internal scans are requested for an interface that is trying to associate, we reject such scans. This was not intended, the mlme code has provisions to scan twice when it can't find the BSS to associate with right away; this has never worked properly. Fix this by not rejecting internal scan requests for an interface that is associating. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 5ca62ea15079..e00d124e4ef7 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -783,6 +783,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, INIT_LIST_HEAD(&local->interfaces); mutex_init(&local->iflist_mtx); + mutex_init(&local->scan_mtx); spin_lock_init(&local->key_lock); @@ -1126,6 +1127,7 @@ void ieee80211_free_hw(struct ieee80211_hw *hw) struct ieee80211_local *local = hw_to_local(hw); mutex_destroy(&local->iflist_mtx); + mutex_destroy(&local->scan_mtx); wiphy_free(local->hw.wiphy); } -- cgit v1.2.3 From 57c4d7b4c4986037be51476b8e3025d5ba18d8b8 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Apr 2009 16:10:04 +0200 Subject: mac80211: clean up beacon interval settings We currently have two beacon interval configuration knobs: hw.conf.beacon_int and vif.bss_info.beacon_int. This is rather confusing, even though the former is used when we beacon ourselves and the latter when we are associated to an AP. This just deprecates the hw.conf.beacon_int setting in favour of always using vif.bss_info.beacon_int. Since it touches all the beaconing IBSS code anyway, we can also add support for the cfg80211 IBSS beacon interval configuration easily. NOTE: The hw.conf.beacon_int setting is retained for now due to drivers still using it -- I couldn't untangle all drivers, some are updated in this patch. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index e00d124e4ef7..b254879d8631 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -294,9 +294,6 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, { struct ieee80211_local *local = sdata->local; - if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN)) - return; - if (!changed) return; @@ -305,6 +302,17 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, &sdata->vif, &sdata->vif.bss_conf, changed); + + /* + * DEPRECATED + * + * ~changed is just there to not do this at resume time + */ + if (changed & BSS_CHANGED_BEACON_INT && ~changed) { + local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; + ieee80211_hw_config(local, + _IEEE80211_CONF_CHANGE_BEACON_INTERVAL); + } } u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) @@ -971,9 +979,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) debugfs_hw_add(local); - if (local->hw.conf.beacon_int < 10) - local->hw.conf.beacon_int = 100; - if (local->hw.max_listen_interval == 0) local->hw.max_listen_interval = 1; -- cgit v1.2.3 From 2d0ddec5b2b859f06116f631fc0ffe94fbceb556 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Apr 2009 16:13:26 +0200 Subject: mac80211: unify config_interface and bss_info_changed The config_interface method is a little strange, it contains the BSSID and beacon updates, while bss_info_changed contains most other BSS information for each interface. This patch removes config_interface and rolls all the information it previously passed to drivers into bss_info_changed. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 131 ++++++++++++++++++++++------------------------------ 1 file changed, 55 insertions(+), 76 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index b254879d8631..c817c9ef215a 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -152,82 +152,6 @@ static void ieee80211_master_set_multicast_list(struct net_device *dev) ieee80211_configure_filter(local); } -/* everything else */ - -int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed) -{ - struct ieee80211_local *local = sdata->local; - struct ieee80211_if_conf conf; - - if (WARN_ON(!netif_running(sdata->dev))) - return 0; - - memset(&conf, 0, sizeof(conf)); - - if (sdata->vif.type == NL80211_IFTYPE_STATION) - conf.bssid = sdata->u.mgd.bssid; - else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) - conf.bssid = sdata->u.ibss.bssid; - else if (sdata->vif.type == NL80211_IFTYPE_AP) - conf.bssid = sdata->dev->dev_addr; - else if (ieee80211_vif_is_mesh(&sdata->vif)) { - static const u8 zero[ETH_ALEN] = { 0 }; - conf.bssid = zero; - } else { - WARN_ON(1); - return -EINVAL; - } - - if (!local->ops->config_interface) - return 0; - - switch (sdata->vif.type) { - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_MESH_POINT: - break; - default: - /* do not warn to simplify caller in scan.c */ - changed &= ~IEEE80211_IFCC_BEACON_ENABLED; - if (WARN_ON(changed & IEEE80211_IFCC_BEACON)) - return -EINVAL; - changed &= ~IEEE80211_IFCC_BEACON; - break; - } - - if (changed & IEEE80211_IFCC_BEACON_ENABLED) { - if (local->sw_scanning) { - conf.enable_beacon = false; - } else { - /* - * Beacon should be enabled, but AP mode must - * check whether there is a beacon configured. - */ - switch (sdata->vif.type) { - case NL80211_IFTYPE_AP: - conf.enable_beacon = - !!rcu_dereference(sdata->u.ap.beacon); - break; - case NL80211_IFTYPE_ADHOC: - conf.enable_beacon = !!sdata->u.ibss.presp; - break; - case NL80211_IFTYPE_MESH_POINT: - conf.enable_beacon = true; - break; - default: - /* not reached */ - WARN_ON(1); - break; - } - } - } - - conf.changed = changed; - - return local->ops->config_interface(local_to_hw(local), - &sdata->vif, &conf); -} - int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) { struct ieee80211_channel *chan; @@ -297,6 +221,61 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, if (!changed) return; + if (sdata->vif.type == NL80211_IFTYPE_STATION) + sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; + else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) + sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; + else if (sdata->vif.type == NL80211_IFTYPE_AP) + sdata->vif.bss_conf.bssid = sdata->dev->dev_addr; + else if (ieee80211_vif_is_mesh(&sdata->vif)) { + static const u8 zero[ETH_ALEN] = { 0 }; + sdata->vif.bss_conf.bssid = zero; + } else { + WARN_ON(1); + return; + } + + switch (sdata->vif.type) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_ADHOC: + case NL80211_IFTYPE_MESH_POINT: + break; + default: + /* do not warn to simplify caller in scan.c */ + changed &= ~BSS_CHANGED_BEACON_ENABLED; + if (WARN_ON(changed & BSS_CHANGED_BEACON)) + return; + break; + } + + if (changed & BSS_CHANGED_BEACON_ENABLED) { + if (local->sw_scanning) { + sdata->vif.bss_conf.enable_beacon = false; + } else { + /* + * Beacon should be enabled, but AP mode must + * check whether there is a beacon configured. + */ + switch (sdata->vif.type) { + case NL80211_IFTYPE_AP: + sdata->vif.bss_conf.enable_beacon = + !!rcu_dereference(sdata->u.ap.beacon); + break; + case NL80211_IFTYPE_ADHOC: + sdata->vif.bss_conf.enable_beacon = + !!rcu_dereference(sdata->u.ibss.presp); + break; + case NL80211_IFTYPE_MESH_POINT: + sdata->vif.bss_conf.enable_beacon = true; + break; + default: + /* not reached */ + WARN_ON(1); + break; + } + } + } + if (local->ops->bss_info_changed) local->ops->bss_info_changed(local_to_hw(local), &sdata->vif, -- cgit v1.2.3 From 2448798133d747ad339e57099e32a1d1e68aca1c Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 23 Apr 2009 18:52:52 +0200 Subject: mac80211: add driver ops wrappers In order to later add tracing or verifications to the driver calls mac80211 makes, this patch adds static inline wrappers for all operations. All calls are now written as drv_(local, ...); instead of local->ops->(&local->hw, ...); Where necessary, the wrappers also do existence checking and return default values as appropriate. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index c817c9ef215a..b80bc80e46cf 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -26,6 +26,7 @@ #include #include "ieee80211_i.h" +#include "driver-ops.h" #include "rate.h" #include "mesh.h" #include "wep.h" @@ -81,10 +82,9 @@ void ieee80211_configure_filter(struct ieee80211_local *local) /* be a bit nasty */ new_flags |= (1<<31); - local->ops->configure_filter(local_to_hw(local), - changed_flags, &new_flags, - local->mdev->mc_count, - local->mdev->mc_list); + drv_configure_filter(local, changed_flags, &new_flags, + local->mdev->mc_count, + local->mdev->mc_list); WARN_ON(new_flags & (1<<31)); @@ -192,7 +192,7 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) } if (changed && local->open_count) { - ret = local->ops->config(local_to_hw(local), changed); + ret = drv_config(local, changed); /* * Goal: * HW reconfiguration should never fail, the driver has told @@ -276,11 +276,8 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, } } - if (local->ops->bss_info_changed) - local->ops->bss_info_changed(local_to_hw(local), - &sdata->vif, - &sdata->vif.bss_conf, - changed); + drv_bss_info_changed(local, &sdata->vif, + &sdata->vif.bss_conf, changed); /* * DEPRECATED -- cgit v1.2.3 From 58905ca5b11a0ff3860f55b789cbbf052f7158a7 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 7 May 2009 14:23:01 +0200 Subject: mac80211: fix scan channel race When a software scan starts, it first sets sw_scanning, but leaves the scan_channel "unset" (it currently actually gets initialised to a default). Now, when something else tries to (re)configure the hardware in the window between these two events (after sw_scanning = true, but before scan_channel is set), the current code switches to the (unset!) scan_channel. This causes trouble, especially when switching bands and sending frames on the wrong channel. To work around this, leave scan_channel initialised to NULL and use it to determine whether or not a switch to a different channel should occur (and also use the same condition to check whether to adjust power for scan or not). Additionally, avoid reconfiguring the hardware completely when recalculating idle resulted in no changes, this was the problem that originally led us to discover the race condition in the first place, which was helpfully bisected by Pavel. This part of the patch should not be necessary with the other fixes, but not calling the ieee80211_hw_config function when we know it to be unnecessary is certainly a correct thing to do. Unfortunately, this patch cannot and does not fix the race condition completely, but due to the way the scan code is structured it makes the particular problem Pavel discovered (race while changing channel at the same time as transmitting frames) go away. To fix it completely, more work especially with locking configuration is needed. Bisected-by: Pavel Roskin Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index b80bc80e46cf..76df5eabf268 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -154,15 +154,17 @@ static void ieee80211_master_set_multicast_list(struct net_device *dev) int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) { - struct ieee80211_channel *chan; + struct ieee80211_channel *chan, *scan_chan; int ret = 0; int power; enum nl80211_channel_type channel_type; might_sleep(); - if (local->sw_scanning) { - chan = local->scan_channel; + scan_chan = local->scan_channel; + + if (scan_chan) { + chan = scan_chan; channel_type = NL80211_CHAN_NO_HT; } else { chan = local->oper_channel; @@ -176,7 +178,7 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) changed |= IEEE80211_CONF_CHANGE_CHANNEL; } - if (local->sw_scanning) + if (scan_chan) power = chan->max_power; else power = local->power_constr_level ? @@ -859,8 +861,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (!local->oper_channel) { /* init channel we're on */ local->hw.conf.channel = - local->oper_channel = - local->scan_channel = &sband->channels[0]; + local->oper_channel = &sband->channels[0]; + local->hw.conf.channel_type = NL80211_CHAN_NO_HT; } channels += sband->n_channels; -- cgit v1.2.3 From 9cef873798dfcdc10ff40b02abf1de935ceeba85 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 14 May 2009 13:10:14 +0200 Subject: mac80211: fix managed mode BSSID handling Currently, we will ask the driver to configure right away when somebody changes the desired BSSID. That's totally strange because then we will configure the driver without even knowing whether the BSS exists. Change this to only configure the BSSID when associated, and configure a zero BSSID when not associated. As a side effect, this fixes an issue with the iwlwifi driver which doesn't implement sta_notify properly and uses the BSSID instead and gets very confused if the BSSID is cleared before we disassociate, which results in the warning Marcel posted [1] and iwlwifi bug 1995 [2]. [1] http://thread.gmane.org/gmane.linux.kernel.wireless.general/32598 [2] http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1995 Cc: Marcel Holtmann Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 76df5eabf268..6b7e92eaab47 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -219,18 +219,26 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, u32 changed) { struct ieee80211_local *local = sdata->local; + static const u8 zero[ETH_ALEN] = { 0 }; if (!changed) return; - if (sdata->vif.type == NL80211_IFTYPE_STATION) - sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; - else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) + if (sdata->vif.type == NL80211_IFTYPE_STATION) { + /* + * While not associated, claim a BSSID of all-zeroes + * so that drivers don't do any weird things with the + * BSSID at that time. + */ + if (sdata->vif.bss_conf.assoc) + sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; + else + sdata->vif.bss_conf.bssid = zero; + } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; else if (sdata->vif.type == NL80211_IFTYPE_AP) sdata->vif.bss_conf.bssid = sdata->dev->dev_addr; else if (ieee80211_vif_is_mesh(&sdata->vif)) { - static const u8 zero[ETH_ALEN] = { 0 }; sdata->vif.bss_conf.bssid = zero; } else { WARN_ON(1); -- cgit v1.2.3 From 1ce8e7b57b3a4527ef83da1c5c7bd8a6b9d87b56 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 27 May 2009 04:42:37 +0000 Subject: net: ALIGN/PTR_ALIGN cleanup in alloc_netdev_mq()/netdev_priv() Use ALIGN() and PTR_ALIGN() macros instead of handcoding them. Get rid of NETDEV_ALIGN_CONST ugly define Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/mac80211/main.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 6b7e92eaab47..e37770ced53c 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -735,9 +735,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, * +-------------------------+ * */ - priv_size = ((sizeof(struct ieee80211_local) + - NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + - priv_data_len; + priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; wiphy = wiphy_new(&mac80211_config_ops, priv_size); @@ -754,9 +752,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, local->hw.wiphy = wiphy; - local->hw.priv = (char *)local + - ((sizeof(struct ieee80211_local) + - NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); + local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); BUG_ON(!ops->tx); BUG_ON(!ops->start); -- cgit v1.2.3 From e535c7566e1318ccfa015e297f0309994f7bc078 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sat, 23 May 2009 11:18:45 +0200 Subject: mac80211: deprecate conf.beacon_int properly Ivo has updated the driver to no longer use the change flag, so we can remove that, but rt2x00 and ath5k still use the actual value so let's mark it as deprecated too. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index e37770ced53c..2683df918073 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -289,16 +289,8 @@ void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, drv_bss_info_changed(local, &sdata->vif, &sdata->vif.bss_conf, changed); - /* - * DEPRECATED - * - * ~changed is just there to not do this at resume time - */ - if (changed & BSS_CHANGED_BEACON_INT && ~changed) { - local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; - ieee80211_hw_config(local, - _IEEE80211_CONF_CHANGE_BEACON_INTERVAL); - } + /* DEPRECATED */ + local->hw.conf.beacon_int = sdata->vif.bss_conf.beacon_int; } u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) -- cgit v1.2.3 From 8f77f3849cc3ae2d6df9301785a3d316ea7d7ee1 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Sun, 7 Jun 2009 21:58:37 +0200 Subject: mac80211: do not pass PS frames out of mac80211 again In order to handle powersave frames properly we had needed to pass these out to the device queues again, and introduce the skb->requeue bit. This, however, also has unnecessary overhead by needing to 'clean up' already tried frames, and this clean-up code is also buggy when software encryption is used. Instead of sending the frames via the master netdev queue again, simply put them into the pending queue. This also fixes a problem where frames for that particular station could be reordered when some were still on the software queues and older ones are re-injected into the software queue after them. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- net/mac80211/main.c | 61 ++++++----------------------------------------------- 1 file changed, 6 insertions(+), 55 deletions(-) (limited to 'net/mac80211/main.c') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 2683df918073..092a017b237e 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -369,60 +369,12 @@ static void ieee80211_tasklet_handler(unsigned long data) } } -/* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to - * make a prepared TX frame (one that has been given to hw) to look like brand - * new IEEE 802.11 frame that is ready to go through TX processing again. - */ -static void ieee80211_remove_tx_extra(struct ieee80211_local *local, - struct ieee80211_key *key, - struct sk_buff *skb) -{ - unsigned int hdrlen, iv_len, mic_len; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - - hdrlen = ieee80211_hdrlen(hdr->frame_control); - - if (!key) - goto no_key; - - switch (key->conf.alg) { - case ALG_WEP: - iv_len = WEP_IV_LEN; - mic_len = WEP_ICV_LEN; - break; - case ALG_TKIP: - iv_len = TKIP_IV_LEN; - mic_len = TKIP_ICV_LEN; - break; - case ALG_CCMP: - iv_len = CCMP_HDR_LEN; - mic_len = CCMP_MIC_LEN; - break; - default: - goto no_key; - } - - if (skb->len >= hdrlen + mic_len && - !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) - skb_trim(skb, skb->len - mic_len); - if (skb->len >= hdrlen + iv_len) { - memmove(skb->data + iv_len, skb->data, hdrlen); - hdr = (struct ieee80211_hdr *)skb_pull(skb, iv_len); - } - -no_key: - if (ieee80211_is_data_qos(hdr->frame_control)) { - hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); - memmove(skb->data + IEEE80211_QOS_CTL_LEN, skb->data, - hdrlen - IEEE80211_QOS_CTL_LEN); - skb_pull(skb, IEEE80211_QOS_CTL_LEN); - } -} - static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, struct sta_info *sta, struct sk_buff *skb) { + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + sta->tx_filtered_count++; /* @@ -464,16 +416,15 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, */ if (test_sta_flags(sta, WLAN_STA_PS) && skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) { - ieee80211_remove_tx_extra(local, sta->key, skb); skb_queue_tail(&sta->tx_filtered, skb); return; } - if (!test_sta_flags(sta, WLAN_STA_PS) && !skb->requeue) { + if (!test_sta_flags(sta, WLAN_STA_PS) && + !(info->flags & IEEE80211_TX_INTFL_RETRIED)) { /* Software retry the packet once */ - skb->requeue = 1; - ieee80211_remove_tx_extra(local, sta->key, skb); - dev_queue_xmit(skb); + info->flags |= IEEE80211_TX_INTFL_RETRIED; + ieee80211_add_pending_skb(local, skb); return; } -- cgit v1.2.3