diff options
Diffstat (limited to 'net/mac80211')
32 files changed, 1946 insertions, 738 deletions
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile index 9d7d840aac6d..1e46ffa69167 100644 --- a/net/mac80211/Makefile +++ b/net/mac80211/Makefile @@ -25,7 +25,8 @@ mac80211-y := \ wme.o \ event.o \ chan.o \ - trace.o mlme.o + trace.o mlme.o \ + tdls.o mac80211-$(CONFIG_MAC80211_LEDS) += led.o mac80211-$(CONFIG_MAC80211_DEBUGFS) += \ diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c index 7c7df475a401..ec24378caaaf 100644 --- a/net/mac80211/aes_ccm.c +++ b/net/mac80211/aes_ccm.c @@ -23,12 +23,13 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist assoc, pt, ct[2]; - struct { - struct aead_request req; - u8 priv[crypto_aead_reqsize(tfm)]; - } aead_req; - memset(&aead_req, 0, sizeof(aead_req)); + char aead_req_data[sizeof(struct aead_request) + + crypto_aead_reqsize(tfm)] + __aligned(__alignof__(struct aead_request)); + struct aead_request *aead_req = (void *) aead_req_data; + + memset(aead_req, 0, sizeof(aead_req_data)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); @@ -36,23 +37,23 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, sg_set_buf(&ct[0], data, data_len); sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); - aead_request_set_tfm(&aead_req.req, tfm); - aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); - aead_request_set_crypt(&aead_req.req, &pt, ct, data_len, b_0); + aead_request_set_tfm(aead_req, tfm); + aead_request_set_assoc(aead_req, &assoc, assoc.length); + aead_request_set_crypt(aead_req, &pt, ct, data_len, b_0); - crypto_aead_encrypt(&aead_req.req); + crypto_aead_encrypt(aead_req); } int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist assoc, pt, ct[2]; - struct { - struct aead_request req; - u8 priv[crypto_aead_reqsize(tfm)]; - } aead_req; + char aead_req_data[sizeof(struct aead_request) + + crypto_aead_reqsize(tfm)] + __aligned(__alignof__(struct aead_request)); + struct aead_request *aead_req = (void *) aead_req_data; - memset(&aead_req, 0, sizeof(aead_req)); + memset(aead_req, 0, sizeof(aead_req_data)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); @@ -60,12 +61,12 @@ int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, sg_set_buf(&ct[0], data, data_len); sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); - aead_request_set_tfm(&aead_req.req, tfm); - aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); - aead_request_set_crypt(&aead_req.req, ct, &pt, + aead_request_set_tfm(aead_req, tfm); + aead_request_set_assoc(aead_req, &assoc, assoc.length); + aead_request_set_crypt(aead_req, ct, &pt, data_len + IEEE80211_CCMP_MIC_LEN, b_0); - return crypto_aead_decrypt(&aead_req.req); + return crypto_aead_decrypt(aead_req); } struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[]) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index aaa59d719592..d7513a503be1 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -109,6 +109,15 @@ static int ieee80211_change_iface(struct wiphy *wiphy, static int ieee80211_start_p2p_device(struct wiphy *wiphy, struct wireless_dev *wdev) { + struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); + int ret; + + mutex_lock(&sdata->local->chanctx_mtx); + ret = ieee80211_check_combinations(sdata, NULL, 0, 0); + mutex_unlock(&sdata->local->chanctx_mtx); + if (ret < 0) + return ret; + return ieee80211_do_open(wdev, true); } @@ -463,8 +472,10 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; + struct rate_control_ref *ref = local->rate_ctrl; struct timespec uptime; u64 packets = 0; + u32 thr = 0; int i, ac; sinfo->generation = sdata->local->sta_generation; @@ -578,6 +589,17 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED); if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER); + + /* check if the driver has a SW RC implementation */ + if (ref && ref->ops->get_expected_throughput) + thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); + else + thr = drv_get_expected_throughput(local, &sta->sta); + + if (thr != 0) { + sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT; + sinfo->expected_throughput = thr; + } } static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = { @@ -768,7 +790,7 @@ static void ieee80211_get_et_strings(struct wiphy *wiphy, } static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev, - int idx, u8 *mac, struct station_info *sinfo) + int idx, u8 *mac, struct station_info *sinfo) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; @@ -798,7 +820,7 @@ static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev, } static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev, - u8 *mac, struct station_info *sinfo) + const u8 *mac, struct station_info *sinfo) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; @@ -972,13 +994,13 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, sdata->needed_rx_chains = sdata->local->rx_chains; mutex_lock(&local->mtx); - sdata->radar_required = params->radar_required; err = ieee80211_vif_use_channel(sdata, ¶ms->chandef, IEEE80211_CHANCTX_SHARED); + if (!err) + ieee80211_vif_copy_chanctx_to_vlans(sdata, false); mutex_unlock(&local->mtx); if (err) return err; - ieee80211_vif_copy_chanctx_to_vlans(sdata, false); /* * Apply control port protocol, this allows us to @@ -1075,6 +1097,31 @@ static int ieee80211_change_beacon(struct wiphy *wiphy, struct net_device *dev, return 0; } +bool ieee80211_csa_needs_block_tx(struct ieee80211_local *local) +{ + struct ieee80211_sub_if_data *sdata; + + lockdep_assert_held(&local->mtx); + + rcu_read_lock(); + list_for_each_entry_rcu(sdata, &local->interfaces, list) { + if (!ieee80211_sdata_running(sdata)) + continue; + + if (!sdata->vif.csa_active) + continue; + + if (!sdata->csa_block_tx) + continue; + + rcu_read_unlock(); + return true; + } + rcu_read_unlock(); + + return false; +} + static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); @@ -1092,7 +1139,14 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) old_probe_resp = sdata_dereference(sdata->u.ap.probe_resp, sdata); /* abort any running channel switch */ + mutex_lock(&local->mtx); sdata->vif.csa_active = false; + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); + mutex_unlock(&local->mtx); + kfree(sdata->u.ap.next_beacon); sdata->u.ap.next_beacon = NULL; @@ -1131,8 +1185,8 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps.bc_buf); skb_queue_purge(&sdata->u.ap.ps.bc_buf); - ieee80211_vif_copy_chanctx_to_vlans(sdata, true); mutex_lock(&local->mtx); + ieee80211_vif_copy_chanctx_to_vlans(sdata, true); ieee80211_vif_release_channel(sdata); mutex_unlock(&local->mtx); @@ -1416,7 +1470,8 @@ static int sta_apply_parameters(struct ieee80211_local *local, } static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev, - u8 *mac, struct station_parameters *params) + const u8 *mac, + struct station_parameters *params) { struct ieee80211_local *local = wiphy_priv(wiphy); struct sta_info *sta; @@ -1450,6 +1505,8 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev, if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) { sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); + } else { + sta->sta.tdls = true; } err = sta_apply_parameters(local, sta, params); @@ -1483,7 +1540,7 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev, } static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev, - u8 *mac) + const u8 *mac) { struct ieee80211_sub_if_data *sdata; @@ -1497,7 +1554,7 @@ static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev, } static int ieee80211_change_station(struct wiphy *wiphy, - struct net_device *dev, u8 *mac, + struct net_device *dev, const u8 *mac, struct station_parameters *params) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); @@ -1566,7 +1623,7 @@ static int ieee80211_change_station(struct wiphy *wiphy, if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sta->sdata->u.vlan.sta) { - rcu_assign_pointer(sta->sdata->u.vlan.sta, NULL); + RCU_INIT_POINTER(sta->sdata->u.vlan.sta, NULL); prev_4addr = true; } @@ -1622,7 +1679,7 @@ out_err: #ifdef CONFIG_MAC80211_MESH static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev, - u8 *dst, u8 *next_hop) + const u8 *dst, const u8 *next_hop) { struct ieee80211_sub_if_data *sdata; struct mesh_path *mpath; @@ -1650,7 +1707,7 @@ static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev, } static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev, - u8 *dst) + const u8 *dst) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); @@ -1661,9 +1718,8 @@ static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev, return 0; } -static int ieee80211_change_mpath(struct wiphy *wiphy, - struct net_device *dev, - u8 *dst, u8 *next_hop) +static int ieee80211_change_mpath(struct wiphy *wiphy, struct net_device *dev, + const u8 *dst, const u8 *next_hop) { struct ieee80211_sub_if_data *sdata; struct mesh_path *mpath; @@ -1755,8 +1811,8 @@ static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev, } static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev, - int idx, u8 *dst, u8 *next_hop, - struct mpath_info *pinfo) + int idx, u8 *dst, u8 *next_hop, + struct mpath_info *pinfo) { struct ieee80211_sub_if_data *sdata; struct mesh_path *mpath; @@ -2930,7 +2986,6 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, /* whatever, but channel contexts should not complain about that one */ sdata->smps_mode = IEEE80211_SMPS_OFF; sdata->needed_rx_chains = local->rx_chains; - sdata->radar_required = true; err = ieee80211_vif_use_channel(sdata, chandef, IEEE80211_CHANCTX_SHARED); @@ -3011,26 +3066,11 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif) } EXPORT_SYMBOL(ieee80211_csa_finish); -static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata) +static int ieee80211_set_after_csa_beacon(struct ieee80211_sub_if_data *sdata, + u32 *changed) { - struct ieee80211_local *local = sdata->local; - int err, changed = 0; - - sdata_assert_lock(sdata); - - mutex_lock(&local->mtx); - sdata->radar_required = sdata->csa_radar_required; - err = ieee80211_vif_change_channel(sdata, &changed); - mutex_unlock(&local->mtx); - if (WARN_ON(err < 0)) - return; - - if (!local->use_chanctx) { - local->_oper_chandef = sdata->csa_chandef; - ieee80211_hw_config(local, 0); - } + int err; - sdata->vif.csa_active = false; switch (sdata->vif.type) { case NL80211_IFTYPE_AP: err = ieee80211_assign_beacon(sdata, sdata->u.ap.next_beacon); @@ -3038,35 +3078,74 @@ static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata) sdata->u.ap.next_beacon = NULL; if (err < 0) - return; - changed |= err; + return err; + *changed |= err; break; case NL80211_IFTYPE_ADHOC: err = ieee80211_ibss_finish_csa(sdata); if (err < 0) - return; - changed |= err; + return err; + *changed |= err; break; #ifdef CONFIG_MAC80211_MESH case NL80211_IFTYPE_MESH_POINT: err = ieee80211_mesh_finish_csa(sdata); if (err < 0) - return; - changed |= err; + return err; + *changed |= err; break; #endif default: WARN_ON(1); - return; + return -EINVAL; } + return 0; +} + +static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_local *local = sdata->local; + u32 changed = 0; + int err; + + sdata_assert_lock(sdata); + lockdep_assert_held(&local->mtx); + + sdata->radar_required = sdata->csa_radar_required; + err = ieee80211_vif_change_channel(sdata, &changed); + if (err < 0) + return err; + + if (!local->use_chanctx) { + local->_oper_chandef = sdata->csa_chandef; + ieee80211_hw_config(local, 0); + } + + sdata->vif.csa_active = false; + + err = ieee80211_set_after_csa_beacon(sdata, &changed); + if (err) + return err; + ieee80211_bss_info_change_notify(sdata, changed); + cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef); - ieee80211_wake_queues_by_reason(&sdata->local->hw, + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); - cfg80211_ch_switch_notify(sdata->dev, &sdata->csa_chandef); + return 0; +} + +static void ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata) +{ + if (__ieee80211_csa_finalize(sdata)) { + sdata_info(sdata, "failed to finalize CSA, disconnecting\n"); + cfg80211_stop_iface(sdata->local->hw.wiphy, &sdata->wdev, + GFP_KERNEL); + } } void ieee80211_csa_finalize_work(struct work_struct *work) @@ -3074,8 +3153,11 @@ void ieee80211_csa_finalize_work(struct work_struct *work) struct ieee80211_sub_if_data *sdata = container_of(work, struct ieee80211_sub_if_data, csa_finalize_work); + struct ieee80211_local *local = sdata->local; sdata_lock(sdata); + mutex_lock(&local->mtx); + /* AP might have been stopped while waiting for the lock. */ if (!sdata->vif.csa_active) goto unlock; @@ -3086,6 +3168,7 @@ void ieee80211_csa_finalize_work(struct work_struct *work) ieee80211_csa_finalize(sdata); unlock: + mutex_unlock(&local->mtx); sdata_unlock(sdata); } @@ -3121,9 +3204,25 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata, if (params->count <= 1) break; - sdata->csa_counter_offset_beacon = - params->counter_offset_beacon; - sdata->csa_counter_offset_presp = params->counter_offset_presp; + if ((params->n_counter_offsets_beacon > + IEEE80211_MAX_CSA_COUNTERS_NUM) || + (params->n_counter_offsets_presp > + IEEE80211_MAX_CSA_COUNTERS_NUM)) + return -EINVAL; + + /* make sure we don't have garbage in other counters */ + memset(sdata->csa_counter_offset_beacon, 0, + sizeof(sdata->csa_counter_offset_beacon)); + memset(sdata->csa_counter_offset_presp, 0, + sizeof(sdata->csa_counter_offset_presp)); + + memcpy(sdata->csa_counter_offset_beacon, + params->counter_offsets_beacon, + params->n_counter_offsets_beacon * sizeof(u16)); + memcpy(sdata->csa_counter_offset_presp, + params->counter_offsets_presp, + params->n_counter_offsets_presp * sizeof(u16)); + err = ieee80211_assign_beacon(sdata, ¶ms->beacon_csa); if (err < 0) { kfree(sdata->u.ap.next_beacon); @@ -3212,16 +3311,18 @@ static int ieee80211_set_csa_beacon(struct ieee80211_sub_if_data *sdata, return 0; } -int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, - struct cfg80211_csa_settings *params) +static int +__ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, + struct cfg80211_csa_settings *params) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; - struct ieee80211_chanctx_conf *chanctx_conf; + struct ieee80211_chanctx_conf *conf; struct ieee80211_chanctx *chanctx; int err, num_chanctx, changed = 0; sdata_assert_lock(sdata); + lockdep_assert_held(&local->mtx); if (!list_empty(&local->roc_list) || local->scanning) return -EBUSY; @@ -3233,23 +3334,24 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, &sdata->vif.bss_conf.chandef)) return -EINVAL; - rcu_read_lock(); - chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); - if (!chanctx_conf) { - rcu_read_unlock(); + mutex_lock(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + if (!conf) { + mutex_unlock(&local->chanctx_mtx); return -EBUSY; } /* don't handle for multi-VIF cases */ - chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); - if (chanctx->refcount > 1) { - rcu_read_unlock(); + chanctx = container_of(conf, struct ieee80211_chanctx, conf); + if (ieee80211_chanctx_refcount(local, chanctx) > 1) { + mutex_unlock(&local->chanctx_mtx); return -EBUSY; } num_chanctx = 0; list_for_each_entry_rcu(chanctx, &local->chanctx_list, list) num_chanctx++; - rcu_read_unlock(); + mutex_unlock(&local->chanctx_mtx); if (num_chanctx > 1) return -EBUSY; @@ -3263,15 +3365,16 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, return err; sdata->csa_radar_required = params->radar_required; - - if (params->block_tx) - ieee80211_stop_queues_by_reason(&local->hw, - IEEE80211_MAX_QUEUE_MAP, - IEEE80211_QUEUE_STOP_REASON_CSA); - sdata->csa_chandef = params->chandef; + sdata->csa_block_tx = params->block_tx; + sdata->csa_current_counter = params->count; sdata->vif.csa_active = true; + if (sdata->csa_block_tx) + ieee80211_stop_queues_by_reason(&local->hw, + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); + if (changed) { ieee80211_bss_info_change_notify(sdata, changed); drv_channel_switch_beacon(sdata, ¶ms->chandef); @@ -3283,6 +3386,20 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, return 0; } +int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, + struct cfg80211_csa_settings *params) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; + int err; + + mutex_lock(&local->mtx); + err = __ieee80211_channel_switch(wiphy, dev, params); + mutex_unlock(&local->mtx); + + return err; +} + static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, struct cfg80211_mgmt_tx_params *params, u64 *cookie) @@ -3295,6 +3412,7 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, bool need_offchan = false; u32 flags; int ret; + u8 *data; if (params->dont_wait_for_ack) flags = IEEE80211_TX_CTL_NO_ACK; @@ -3388,7 +3506,20 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, } skb_reserve(skb, local->hw.extra_tx_headroom); - memcpy(skb_put(skb, params->len), params->buf, params->len); + data = skb_put(skb, params->len); + memcpy(data, params->buf, params->len); + + /* Update CSA counters */ + if (sdata->vif.csa_active && + (sdata->vif.type == NL80211_IFTYPE_AP || + sdata->vif.type == NL80211_IFTYPE_ADHOC) && + params->n_csa_offsets) { + int i; + u8 c = sdata->csa_current_counter; + + for (i = 0; i < params->n_csa_offsets; i++) + data[params->csa_offsets[i]] = c; + } IEEE80211_SKB_CB(skb)->flags = flags; @@ -3497,320 +3628,6 @@ static int ieee80211_set_rekey_data(struct wiphy *wiphy, return 0; } -static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb) -{ - u8 *pos = (void *)skb_put(skb, 7); - - *pos++ = WLAN_EID_EXT_CAPABILITY; - *pos++ = 5; /* len */ - *pos++ = 0x0; - *pos++ = 0x0; - *pos++ = 0x0; - *pos++ = 0x0; - *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; -} - -static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata) -{ - struct ieee80211_local *local = sdata->local; - u16 capab; - - capab = 0; - if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) - return capab; - - if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) - capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; - if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) - capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; - - return capab; -} - -static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, u8 *src_addr, - u8 *peer, u8 *bssid) -{ - struct ieee80211_tdls_lnkie *lnkid; - - lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); - - lnkid->ie_type = WLAN_EID_LINK_ID; - lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; - - memcpy(lnkid->bssid, bssid, ETH_ALEN); - memcpy(lnkid->init_sta, src_addr, ETH_ALEN); - memcpy(lnkid->resp_sta, peer, ETH_ALEN); -} - -static int -ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, - u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, struct sk_buff *skb) -{ - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - enum ieee80211_band band = ieee80211_get_sdata_band(sdata); - struct ieee80211_tdls_data *tf; - - tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); - - memcpy(tf->da, peer, ETH_ALEN); - memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); - tf->ether_type = cpu_to_be16(ETH_P_TDLS); - tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; - - switch (action_code) { - case WLAN_TDLS_SETUP_REQUEST: - tf->category = WLAN_CATEGORY_TDLS; - tf->action_code = WLAN_TDLS_SETUP_REQUEST; - - skb_put(skb, sizeof(tf->u.setup_req)); - tf->u.setup_req.dialog_token = dialog_token; - tf->u.setup_req.capability = - cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); - - ieee80211_add_srates_ie(sdata, skb, false, band); - ieee80211_add_ext_srates_ie(sdata, skb, false, band); - ieee80211_tdls_add_ext_capab(skb); - break; - case WLAN_TDLS_SETUP_RESPONSE: - tf->category = WLAN_CATEGORY_TDLS; - tf->action_code = WLAN_TDLS_SETUP_RESPONSE; - - skb_put(skb, sizeof(tf->u.setup_resp)); - tf->u.setup_resp.status_code = cpu_to_le16(status_code); - tf->u.setup_resp.dialog_token = dialog_token; - tf->u.setup_resp.capability = - cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); - - ieee80211_add_srates_ie(sdata, skb, false, band); - ieee80211_add_ext_srates_ie(sdata, skb, false, band); - ieee80211_tdls_add_ext_capab(skb); - break; - case WLAN_TDLS_SETUP_CONFIRM: - tf->category = WLAN_CATEGORY_TDLS; - tf->action_code = WLAN_TDLS_SETUP_CONFIRM; - - skb_put(skb, sizeof(tf->u.setup_cfm)); - tf->u.setup_cfm.status_code = cpu_to_le16(status_code); - tf->u.setup_cfm.dialog_token = dialog_token; - break; - case WLAN_TDLS_TEARDOWN: - tf->category = WLAN_CATEGORY_TDLS; - tf->action_code = WLAN_TDLS_TEARDOWN; - - skb_put(skb, sizeof(tf->u.teardown)); - tf->u.teardown.reason_code = cpu_to_le16(status_code); - break; - case WLAN_TDLS_DISCOVERY_REQUEST: - tf->category = WLAN_CATEGORY_TDLS; - tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; - - skb_put(skb, sizeof(tf->u.discover_req)); - tf->u.discover_req.dialog_token = dialog_token; - break; - default: - return -EINVAL; - } - - return 0; -} - -static int -ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, - u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, struct sk_buff *skb) -{ - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - enum ieee80211_band band = ieee80211_get_sdata_band(sdata); - struct ieee80211_mgmt *mgmt; - - mgmt = (void *)skb_put(skb, 24); - memset(mgmt, 0, 24); - memcpy(mgmt->da, peer, ETH_ALEN); - memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); - memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); - - mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | - IEEE80211_STYPE_ACTION); - - switch (action_code) { - case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: - skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); - mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; - mgmt->u.action.u.tdls_discover_resp.action_code = - WLAN_PUB_ACTION_TDLS_DISCOVER_RES; - mgmt->u.action.u.tdls_discover_resp.dialog_token = - dialog_token; - mgmt->u.action.u.tdls_discover_resp.capability = - cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); - - ieee80211_add_srates_ie(sdata, skb, false, band); - ieee80211_add_ext_srates_ie(sdata, skb, false, band); - ieee80211_tdls_add_ext_capab(skb); - break; - default: - return -EINVAL; - } - - return 0; -} - -static int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, - u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, u32 peer_capability, - const u8 *extra_ies, size_t extra_ies_len) -{ - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - struct ieee80211_local *local = sdata->local; - struct sk_buff *skb = NULL; - bool send_direct; - int ret; - - if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) - return -ENOTSUPP; - - /* make sure we are in managed mode, and associated */ - if (sdata->vif.type != NL80211_IFTYPE_STATION || - !sdata->u.mgd.associated) - return -EINVAL; - - tdls_dbg(sdata, "TDLS mgmt action %d peer %pM\n", - action_code, peer); - - skb = dev_alloc_skb(local->hw.extra_tx_headroom + - max(sizeof(struct ieee80211_mgmt), - sizeof(struct ieee80211_tdls_data)) + - 50 + /* supported rates */ - 7 + /* ext capab */ - extra_ies_len + - sizeof(struct ieee80211_tdls_lnkie)); - if (!skb) - return -ENOMEM; - - skb_reserve(skb, local->hw.extra_tx_headroom); - - switch (action_code) { - case WLAN_TDLS_SETUP_REQUEST: - case WLAN_TDLS_SETUP_RESPONSE: - case WLAN_TDLS_SETUP_CONFIRM: - case WLAN_TDLS_TEARDOWN: - case WLAN_TDLS_DISCOVERY_REQUEST: - ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer, - action_code, dialog_token, - status_code, skb); - send_direct = false; - break; - case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: - ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code, - dialog_token, status_code, - skb); - send_direct = true; - break; - default: - ret = -ENOTSUPP; - break; - } - - if (ret < 0) - goto fail; - - if (extra_ies_len) - memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); - - /* the TDLS link IE is always added last */ - switch (action_code) { - case WLAN_TDLS_SETUP_REQUEST: - case WLAN_TDLS_SETUP_CONFIRM: - case WLAN_TDLS_TEARDOWN: - case WLAN_TDLS_DISCOVERY_REQUEST: - /* we are the initiator */ - ieee80211_tdls_add_link_ie(skb, sdata->vif.addr, peer, - sdata->u.mgd.bssid); - break; - case WLAN_TDLS_SETUP_RESPONSE: - case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: - /* we are the responder */ - ieee80211_tdls_add_link_ie(skb, peer, sdata->vif.addr, - sdata->u.mgd.bssid); - break; - default: - ret = -ENOTSUPP; - goto fail; - } - - if (send_direct) { - ieee80211_tx_skb(sdata, skb); - return 0; - } - - /* - * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise - * we should default to AC_VI. - */ - switch (action_code) { - case WLAN_TDLS_SETUP_REQUEST: - case WLAN_TDLS_SETUP_RESPONSE: - skb_set_queue_mapping(skb, IEEE80211_AC_BK); - skb->priority = 2; - break; - default: - skb_set_queue_mapping(skb, IEEE80211_AC_VI); - skb->priority = 5; - break; - } - - /* disable bottom halves when entering the Tx path */ - local_bh_disable(); - ret = ieee80211_subif_start_xmit(skb, dev); - local_bh_enable(); - - return ret; - -fail: - dev_kfree_skb(skb); - return ret; -} - -static int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, - u8 *peer, enum nl80211_tdls_operation oper) -{ - struct sta_info *sta; - struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); - - if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) - return -ENOTSUPP; - - if (sdata->vif.type != NL80211_IFTYPE_STATION) - return -EINVAL; - - tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); - - switch (oper) { - case NL80211_TDLS_ENABLE_LINK: - rcu_read_lock(); - sta = sta_info_get(sdata, peer); - if (!sta) { - rcu_read_unlock(); - return -ENOLINK; - } - - set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); - rcu_read_unlock(); - break; - case NL80211_TDLS_DISABLE_LINK: - return sta_info_destroy_addr(sdata, peer); - case NL80211_TDLS_TEARDOWN: - case NL80211_TDLS_SETUP: - case NL80211_TDLS_DISCOVERY_REQ: - /* We don't support in-driver setup/teardown/discovery */ - return -ENOTSUPP; - default: - return -ENOTSUPP; - } - - return 0; -} - static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev, const u8 *peer, u64 *cookie) { @@ -3949,6 +3766,21 @@ static int ieee80211_set_qos_map(struct wiphy *wiphy, return 0; } +static int ieee80211_set_ap_chanwidth(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_chan_def *chandef) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + int ret; + u32 changed = 0; + + ret = ieee80211_vif_change_bandwidth(sdata, chandef, &changed); + if (ret == 0) + ieee80211_bss_info_change_notify(sdata, changed); + + return ret; +} + const struct cfg80211_ops mac80211_config_ops = { .add_virtual_intf = ieee80211_add_iface, .del_virtual_intf = ieee80211_del_iface, @@ -4029,4 +3861,5 @@ const struct cfg80211_ops mac80211_config_ops = { .start_radar_detection = ieee80211_start_radar_detection, .channel_switch = ieee80211_channel_switch, .set_qos_map = ieee80211_set_qos_map, + .set_ap_chanwidth = ieee80211_set_ap_chanwidth, }; diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 75b5dd2c9267..a310e33972de 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -9,6 +9,170 @@ #include "ieee80211_i.h" #include "driver-ops.h" +static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) +{ + struct ieee80211_sub_if_data *sdata; + int num = 0; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) + num++; + + return num; +} + +static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) +{ + struct ieee80211_sub_if_data *sdata; + int num = 0; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) + num++; + + return num; +} + +int ieee80211_chanctx_refcount(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) +{ + return ieee80211_chanctx_num_assigned(local, ctx) + + ieee80211_chanctx_num_reserved(local, ctx); +} + +static int ieee80211_num_chanctx(struct ieee80211_local *local) +{ + struct ieee80211_chanctx *ctx; + int num = 0; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(ctx, &local->chanctx_list, list) + num++; + + return num; +} + +static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local) +{ + lockdep_assert_held(&local->chanctx_mtx); + return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local); +} + +static const struct cfg80211_chan_def * +ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx, + const struct cfg80211_chan_def *compat) +{ + struct ieee80211_sub_if_data *sdata; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(sdata, &ctx->reserved_vifs, + reserved_chanctx_list) { + if (!compat) + compat = &sdata->reserved_chandef; + + compat = cfg80211_chandef_compatible(&sdata->reserved_chandef, + compat); + if (!compat) + break; + } + + return compat; +} + +static const struct cfg80211_chan_def * +ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx, + const struct cfg80211_chan_def *compat) +{ + struct ieee80211_sub_if_data *sdata; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(sdata, &ctx->assigned_vifs, + assigned_chanctx_list) { + if (sdata->reserved_chanctx != NULL) + continue; + + if (!compat) + compat = &sdata->vif.bss_conf.chandef; + + compat = cfg80211_chandef_compatible( + &sdata->vif.bss_conf.chandef, compat); + if (!compat) + break; + } + + return compat; +} + +static const struct cfg80211_chan_def * +ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx, + const struct cfg80211_chan_def *compat) +{ + lockdep_assert_held(&local->chanctx_mtx); + + compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); + if (!compat) + return NULL; + + compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); + if (!compat) + return NULL; + + return compat; +} + +static bool +ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx, + const struct cfg80211_chan_def *def) +{ + lockdep_assert_held(&local->chanctx_mtx); + + if (ieee80211_chanctx_combined_chandef(local, ctx, def)) + return true; + + if (!list_empty(&ctx->reserved_vifs) && + ieee80211_chanctx_reserved_chandef(local, ctx, def)) + return true; + + return false; +} + +static struct ieee80211_chanctx * +ieee80211_find_reservation_chanctx(struct ieee80211_local *local, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode) +{ + struct ieee80211_chanctx *ctx; + + lockdep_assert_held(&local->chanctx_mtx); + + if (mode == IEEE80211_CHANCTX_EXCLUSIVE) + return NULL; + + list_for_each_entry(ctx, &local->chanctx_list, list) { + if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) + continue; + + if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, + chandef)) + continue; + + return ctx; + } + + return NULL; +} + static enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) { switch (sta->bandwidth) { @@ -190,6 +354,11 @@ ieee80211_find_chanctx(struct ieee80211_local *local, if (!compat) continue; + compat = ieee80211_chanctx_reserved_chandef(local, ctx, + compat); + if (!compat) + continue; + ieee80211_change_chanctx(local, ctx, compat); return ctx; @@ -217,62 +386,91 @@ static bool ieee80211_is_radar_required(struct ieee80211_local *local) } static struct ieee80211_chanctx * -ieee80211_new_chanctx(struct ieee80211_local *local, - const struct cfg80211_chan_def *chandef, - enum ieee80211_chanctx_mode mode) +ieee80211_alloc_chanctx(struct ieee80211_local *local, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode) { struct ieee80211_chanctx *ctx; - u32 changed; - int err; lockdep_assert_held(&local->chanctx_mtx); ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); if (!ctx) - return ERR_PTR(-ENOMEM); + return NULL; + INIT_LIST_HEAD(&ctx->assigned_vifs); + INIT_LIST_HEAD(&ctx->reserved_vifs); ctx->conf.def = *chandef; ctx->conf.rx_chains_static = 1; ctx->conf.rx_chains_dynamic = 1; ctx->mode = mode; ctx->conf.radar_enabled = ieee80211_is_radar_required(local); ieee80211_recalc_chanctx_min_def(local, ctx); + + return ctx; +} + +static int ieee80211_add_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) +{ + u32 changed; + int err; + + lockdep_assert_held(&local->mtx); + lockdep_assert_held(&local->chanctx_mtx); + if (!local->use_chanctx) local->hw.conf.radar_enabled = ctx->conf.radar_enabled; - /* we hold the mutex to prevent idle from changing */ - lockdep_assert_held(&local->mtx); /* turn idle off *before* setting channel -- some drivers need that */ changed = ieee80211_idle_off(local); if (changed) ieee80211_hw_config(local, changed); if (!local->use_chanctx) { - local->_oper_chandef = *chandef; + local->_oper_chandef = ctx->conf.def; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); } else { err = drv_add_chanctx(local, ctx); if (err) { - kfree(ctx); ieee80211_recalc_idle(local); - return ERR_PTR(err); + return err; } } - /* and keep the mutex held until the new chanctx is on the list */ - list_add_rcu(&ctx->list, &local->chanctx_list); + return 0; +} +static struct ieee80211_chanctx * +ieee80211_new_chanctx(struct ieee80211_local *local, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode) +{ + struct ieee80211_chanctx *ctx; + int err; + + lockdep_assert_held(&local->mtx); + lockdep_assert_held(&local->chanctx_mtx); + + ctx = ieee80211_alloc_chanctx(local, chandef, mode); + if (!ctx) + return ERR_PTR(-ENOMEM); + + err = ieee80211_add_chanctx(local, ctx); + if (err) { + kfree(ctx); + return ERR_PTR(err); + } + + list_add_rcu(&ctx->list, &local->chanctx_list); return ctx; } -static void ieee80211_free_chanctx(struct ieee80211_local *local, - struct ieee80211_chanctx *ctx) +static void ieee80211_del_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) { - bool check_single_channel = false; lockdep_assert_held(&local->chanctx_mtx); - WARN_ON_ONCE(ctx->refcount != 0); - if (!local->use_chanctx) { struct cfg80211_chan_def *chandef = &local->_oper_chandef; chandef->width = NL80211_CHAN_WIDTH_20_NOHT; @@ -282,8 +480,9 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local, /* NOTE: Disabling radar is only valid here for * single channel context. To be sure, check it ... */ - if (local->hw.conf.radar_enabled) - check_single_channel = true; + WARN_ON(local->hw.conf.radar_enabled && + !list_empty(&local->chanctx_list)); + local->hw.conf.radar_enabled = false; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); @@ -291,39 +490,19 @@ static void ieee80211_free_chanctx(struct ieee80211_local *local, drv_remove_chanctx(local, ctx); } - list_del_rcu(&ctx->list); - kfree_rcu(ctx, rcu_head); - - /* throw a warning if this wasn't the only channel context. */ - WARN_ON(check_single_channel && !list_empty(&local->chanctx_list)); - ieee80211_recalc_idle(local); } -static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, - struct ieee80211_chanctx *ctx) +static void ieee80211_free_chanctx(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx) { - struct ieee80211_local *local = sdata->local; - int ret; - lockdep_assert_held(&local->chanctx_mtx); - ret = drv_assign_vif_chanctx(local, sdata, ctx); - if (ret) - return ret; + WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); - rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); - ctx->refcount++; - - ieee80211_recalc_txpower(sdata); - ieee80211_recalc_chanctx_min_def(local, ctx); - sdata->vif.bss_conf.idle = false; - - if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && - sdata->vif.type != NL80211_IFTYPE_MONITOR) - ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); - - return 0; + list_del_rcu(&ctx->list); + ieee80211_del_chanctx(local, ctx); + kfree_rcu(ctx, rcu_head); } static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, @@ -384,30 +563,58 @@ static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); } -static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata, - struct ieee80211_chanctx *ctx) +static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, + struct ieee80211_chanctx *new_ctx) { struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *conf; + struct ieee80211_chanctx *curr_ctx = NULL; + int ret = 0; - lockdep_assert_held(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); - ctx->refcount--; - rcu_assign_pointer(sdata->vif.chanctx_conf, NULL); + if (conf) { + curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); - sdata->vif.bss_conf.idle = true; + drv_unassign_vif_chanctx(local, sdata, curr_ctx); + conf = NULL; + list_del(&sdata->assigned_chanctx_list); + } - if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && - sdata->vif.type != NL80211_IFTYPE_MONITOR) - ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE); + if (new_ctx) { + ret = drv_assign_vif_chanctx(local, sdata, new_ctx); + if (ret) + goto out; - drv_unassign_vif_chanctx(local, sdata, ctx); + conf = &new_ctx->conf; + list_add(&sdata->assigned_chanctx_list, + &new_ctx->assigned_vifs); + } + +out: + rcu_assign_pointer(sdata->vif.chanctx_conf, conf); + + sdata->vif.bss_conf.idle = !conf; + + if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { + ieee80211_recalc_chanctx_chantype(local, curr_ctx); + ieee80211_recalc_smps_chanctx(local, curr_ctx); + ieee80211_recalc_radar_chanctx(local, curr_ctx); + ieee80211_recalc_chanctx_min_def(local, curr_ctx); + } - if (ctx->refcount > 0) { - ieee80211_recalc_chanctx_chantype(sdata->local, ctx); - ieee80211_recalc_smps_chanctx(local, ctx); - ieee80211_recalc_radar_chanctx(local, ctx); - ieee80211_recalc_chanctx_min_def(local, ctx); + if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { + ieee80211_recalc_txpower(sdata); + ieee80211_recalc_chanctx_min_def(local, new_ctx); } + + if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && + sdata->vif.type != NL80211_IFTYPE_MONITOR) + ieee80211_bss_info_change_notify(sdata, + BSS_CHANGED_IDLE); + + return ret; } static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) @@ -425,8 +632,11 @@ static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) ctx = container_of(conf, struct ieee80211_chanctx, conf); - ieee80211_unassign_vif_chanctx(sdata, ctx); - if (ctx->refcount == 0) + if (sdata->reserved_chanctx) + ieee80211_vif_unreserve_chanctx(sdata); + + ieee80211_assign_vif_chanctx(sdata, NULL); + if (ieee80211_chanctx_refcount(local, ctx) == 0) ieee80211_free_chanctx(local, ctx); } @@ -526,6 +736,7 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, { struct ieee80211_local *local = sdata->local; struct ieee80211_chanctx *ctx; + u8 radar_detect_width = 0; int ret; lockdep_assert_held(&local->mtx); @@ -533,6 +744,22 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); mutex_lock(&local->chanctx_mtx); + + ret = cfg80211_chandef_dfs_required(local->hw.wiphy, + chandef, + sdata->wdev.iftype); + if (ret < 0) + goto out; + if (ret > 0) + radar_detect_width = BIT(chandef->width); + + sdata->radar_required = ret; + + ret = ieee80211_check_combinations(sdata, chandef, mode, + radar_detect_width); + if (ret < 0) + goto out; + __ieee80211_vif_release_channel(sdata); ctx = ieee80211_find_chanctx(local, chandef, mode); @@ -548,7 +775,7 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, ret = ieee80211_assign_vif_chanctx(sdata, ctx); if (ret) { /* if assign fails refcount stays the same */ - if (ctx->refcount == 0) + if (ieee80211_chanctx_refcount(local, ctx) == 0) ieee80211_free_chanctx(local, ctx); goto out; } @@ -560,15 +787,47 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, return ret; } +static int __ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, + struct ieee80211_chanctx *ctx, + u32 *changed) +{ + struct ieee80211_local *local = sdata->local; + const struct cfg80211_chan_def *chandef = &sdata->csa_chandef; + u32 chanctx_changed = 0; + + if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, + IEEE80211_CHAN_DISABLED)) + return -EINVAL; + + if (ieee80211_chanctx_refcount(local, ctx) != 1) + return -EINVAL; + + if (sdata->vif.bss_conf.chandef.width != chandef->width) { + chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH; + *changed |= BSS_CHANGED_BANDWIDTH; + } + + sdata->vif.bss_conf.chandef = *chandef; + ctx->conf.def = *chandef; + + chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL; + drv_change_chanctx(local, ctx, chanctx_changed); + + ieee80211_recalc_chanctx_chantype(local, ctx); + ieee80211_recalc_smps_chanctx(local, ctx); + ieee80211_recalc_radar_chanctx(local, ctx); + ieee80211_recalc_chanctx_min_def(local, ctx); + + return 0; +} + int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, u32 *changed) { struct ieee80211_local *local = sdata->local; struct ieee80211_chanctx_conf *conf; struct ieee80211_chanctx *ctx; - const struct cfg80211_chan_def *chandef = &sdata->csa_chandef; int ret; - u32 chanctx_changed = 0; lockdep_assert_held(&local->mtx); @@ -576,11 +835,94 @@ int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, if (WARN_ON(!sdata->vif.csa_active)) return -EINVAL; - if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, - IEEE80211_CHAN_DISABLED)) + mutex_lock(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + if (!conf) { + ret = -EINVAL; + goto out; + } + + ctx = container_of(conf, struct ieee80211_chanctx, conf); + + ret = __ieee80211_vif_change_channel(sdata, ctx, changed); + out: + mutex_unlock(&local->chanctx_mtx); + return ret; +} + +static void +__ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, + bool clear) +{ + struct ieee80211_local *local __maybe_unused = sdata->local; + struct ieee80211_sub_if_data *vlan; + struct ieee80211_chanctx_conf *conf; + + if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) + return; + + lockdep_assert_held(&local->mtx); + + /* Check that conf exists, even when clearing this function + * must be called with the AP's channel context still there + * as it would otherwise cause VLANs to have an invalid + * channel context pointer for a while, possibly pointing + * to a channel context that has already been freed. + */ + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + WARN_ON(!conf); + + if (clear) + conf = NULL; + + list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) + rcu_assign_pointer(vlan->vif.chanctx_conf, conf); +} + +void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, + bool clear) +{ + struct ieee80211_local *local = sdata->local; + + mutex_lock(&local->chanctx_mtx); + + __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); + + mutex_unlock(&local->chanctx_mtx); +} + +int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; + + lockdep_assert_held(&sdata->local->chanctx_mtx); + + if (WARN_ON(!ctx)) return -EINVAL; + list_del(&sdata->reserved_chanctx_list); + sdata->reserved_chanctx = NULL; + + if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) + ieee80211_free_chanctx(sdata->local, ctx); + + return 0; +} + +int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode, + bool radar_required) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *conf; + struct ieee80211_chanctx *new_ctx, *curr_ctx; + int ret = 0; + mutex_lock(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, lockdep_is_held(&local->chanctx_mtx)); if (!conf) { @@ -588,30 +930,108 @@ int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, goto out; } - ctx = container_of(conf, struct ieee80211_chanctx, conf); - if (ctx->refcount != 1) { + curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); + + new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); + if (!new_ctx) { + if (ieee80211_chanctx_refcount(local, curr_ctx) == 1 && + (local->hw.flags & IEEE80211_HW_CHANGE_RUNNING_CHANCTX)) { + /* if we're the only users of the chanctx and + * the driver supports changing a running + * context, reserve our current context + */ + new_ctx = curr_ctx; + } else if (ieee80211_can_create_new_chanctx(local)) { + /* create a new context and reserve it */ + new_ctx = ieee80211_new_chanctx(local, chandef, mode); + if (IS_ERR(new_ctx)) { + ret = PTR_ERR(new_ctx); + goto out; + } + } else { + ret = -EBUSY; + goto out; + } + } + + list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); + sdata->reserved_chanctx = new_ctx; + sdata->reserved_chandef = *chandef; + sdata->reserved_radar_required = radar_required; +out: + mutex_unlock(&local->chanctx_mtx); + return ret; +} + +int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata, + u32 *changed) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx *ctx; + struct ieee80211_chanctx *old_ctx; + struct ieee80211_chanctx_conf *conf; + int ret; + u32 tmp_changed = *changed; + + /* TODO: need to recheck if the chandef is usable etc.? */ + + lockdep_assert_held(&local->mtx); + + mutex_lock(&local->chanctx_mtx); + + ctx = sdata->reserved_chanctx; + if (WARN_ON(!ctx)) { ret = -EINVAL; goto out; } - if (sdata->vif.bss_conf.chandef.width != chandef->width) { - chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH; - *changed |= BSS_CHANGED_BANDWIDTH; + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + if (!conf) { + ret = -EINVAL; + goto out; } - sdata->vif.bss_conf.chandef = *chandef; - ctx->conf.def = *chandef; + old_ctx = container_of(conf, struct ieee80211_chanctx, conf); - chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL; - drv_change_chanctx(local, ctx, chanctx_changed); + if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) + tmp_changed |= BSS_CHANGED_BANDWIDTH; + + sdata->vif.bss_conf.chandef = sdata->reserved_chandef; + + /* unref our reservation */ + sdata->reserved_chanctx = NULL; + sdata->radar_required = sdata->reserved_radar_required; + list_del(&sdata->reserved_chanctx_list); + + if (old_ctx == ctx) { + /* This is our own context, just change it */ + ret = __ieee80211_vif_change_channel(sdata, old_ctx, + &tmp_changed); + if (ret) + goto out; + } else { + ret = ieee80211_assign_vif_chanctx(sdata, ctx); + if (ieee80211_chanctx_refcount(local, old_ctx) == 0) + ieee80211_free_chanctx(local, old_ctx); + if (ret) { + /* if assign fails refcount stays the same */ + if (ieee80211_chanctx_refcount(local, ctx) == 0) + ieee80211_free_chanctx(local, ctx); + goto out; + } + + if (sdata->vif.type == NL80211_IFTYPE_AP) + __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); + } + + *changed = tmp_changed; ieee80211_recalc_chanctx_chantype(local, ctx); ieee80211_recalc_smps_chanctx(local, ctx); ieee80211_recalc_radar_chanctx(local, ctx); ieee80211_recalc_chanctx_min_def(local, ctx); - - ret = 0; - out: +out: mutex_unlock(&local->chanctx_mtx); return ret; } @@ -695,40 +1115,6 @@ void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) mutex_unlock(&local->chanctx_mtx); } -void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, - bool clear) -{ - struct ieee80211_local *local = sdata->local; - struct ieee80211_sub_if_data *vlan; - struct ieee80211_chanctx_conf *conf; - - ASSERT_RTNL(); - - if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) - return; - - mutex_lock(&local->chanctx_mtx); - - /* - * Check that conf exists, even when clearing this function - * must be called with the AP's channel context still there - * as it would otherwise cause VLANs to have an invalid - * channel context pointer for a while, possibly pointing - * to a channel context that has already been freed. - */ - conf = rcu_dereference_protected(sdata->vif.chanctx_conf, - lockdep_is_held(&local->chanctx_mtx)); - WARN_ON(!conf); - - if (clear) - conf = NULL; - - list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) - rcu_assign_pointer(vlan->vif.chanctx_conf, conf); - - mutex_unlock(&local->chanctx_mtx); -} - void ieee80211_iter_chan_contexts_atomic( struct ieee80211_hw *hw, void (*iter)(struct ieee80211_hw *hw, diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c index fa16e54980a1..0e963bc1ceac 100644 --- a/net/mac80211/debugfs.c +++ b/net/mac80211/debugfs.c @@ -128,7 +128,7 @@ static ssize_t sta_tx_latency_stat_write(struct file *file, if (!strcmp(buf, TX_LATENCY_DISABLED)) { if (!tx_latency) goto unlock; - rcu_assign_pointer(local->tx_latency, NULL); + RCU_INIT_POINTER(local->tx_latency, NULL); synchronize_rcu(); kfree(tx_latency); goto unlock; diff --git a/net/mac80211/debugfs.h b/net/mac80211/debugfs.h index 214ed4ecd739..60c35afee29d 100644 --- a/net/mac80211/debugfs.h +++ b/net/mac80211/debugfs.h @@ -1,6 +1,8 @@ #ifndef __MAC80211_DEBUGFS_H #define __MAC80211_DEBUGFS_H +#include "ieee80211_i.h" + #ifdef CONFIG_MAC80211_DEBUGFS void debugfs_hw_add(struct ieee80211_local *local); int __printf(4, 5) mac80211_format_buffer(char __user *userbuf, size_t count, diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index 40a648938985..e205ebabfa50 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -34,8 +34,7 @@ static ssize_t ieee80211_if_read( ssize_t ret = -EINVAL; read_lock(&dev_base_lock); - if (sdata->dev->reg_state == NETREG_REGISTERED) - ret = (*format)(sdata, buf, sizeof(buf)); + ret = (*format)(sdata, buf, sizeof(buf)); read_unlock(&dev_base_lock); if (ret >= 0) @@ -62,8 +61,7 @@ static ssize_t ieee80211_if_write( ret = -ENODEV; rtnl_lock(); - if (sdata->dev->reg_state == NETREG_REGISTERED) - ret = (*write)(sdata, buf, count); + ret = (*write)(sdata, buf, count); rtnl_unlock(); return ret; diff --git a/net/mac80211/debugfs_netdev.h b/net/mac80211/debugfs_netdev.h index 79025e79f4d6..9f5501a9a795 100644 --- a/net/mac80211/debugfs_netdev.h +++ b/net/mac80211/debugfs_netdev.h @@ -3,6 +3,8 @@ #ifndef __IEEE80211_DEBUGFS_NETDEV_H #define __IEEE80211_DEBUGFS_NETDEV_H +#include "ieee80211_i.h" + #ifdef CONFIG_MAC80211_DEBUGFS void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata); void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata); diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index fc689f5d971e..bd782dcffcc7 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -5,11 +5,11 @@ #include "ieee80211_i.h" #include "trace.h" -static inline void check_sdata_in_driver(struct ieee80211_sub_if_data *sdata) +static inline bool check_sdata_in_driver(struct ieee80211_sub_if_data *sdata) { - WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER), - "%s: Failed check-sdata-in-driver check, flags: 0x%x\n", - sdata->dev ? sdata->dev->name : sdata->name, sdata->flags); + return !WARN(!(sdata->flags & IEEE80211_SDATA_IN_DRIVER), + "%s: Failed check-sdata-in-driver check, flags: 0x%x\n", + sdata->dev ? sdata->dev->name : sdata->name, sdata->flags); } static inline struct ieee80211_sub_if_data * @@ -168,7 +168,8 @@ static inline int drv_change_interface(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_change_interface(local, sdata, type, p2p); ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p); @@ -181,7 +182,8 @@ static inline void drv_remove_interface(struct ieee80211_local *local, { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_remove_interface(local, sdata); local->ops->remove_interface(&local->hw, &sdata->vif); @@ -219,7 +221,8 @@ static inline void drv_bss_info_changed(struct ieee80211_local *local, sdata->vif.type == NL80211_IFTYPE_MONITOR)) return; - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_bss_info_changed(local, sdata, info, changed); if (local->ops->bss_info_changed) @@ -278,7 +281,8 @@ static inline int drv_set_key(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_set_key(local, cmd, sdata, sta, key); ret = local->ops->set_key(&local->hw, cmd, &sdata->vif, sta, key); @@ -298,7 +302,8 @@ static inline void drv_update_tkip_key(struct ieee80211_local *local, ista = &sta->sta; sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_update_tkip_key(local, sdata, conf, ista, iv32); if (local->ops->update_tkip_key) @@ -315,7 +320,8 @@ static inline int drv_hw_scan(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_hw_scan(local, sdata); ret = local->ops->hw_scan(&local->hw, &sdata->vif, req); @@ -328,7 +334,8 @@ static inline void drv_cancel_hw_scan(struct ieee80211_local *local, { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_cancel_hw_scan(local, sdata); local->ops->cancel_hw_scan(&local->hw, &sdata->vif); @@ -345,7 +352,8 @@ drv_sched_scan_start(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_sched_scan_start(local, sdata); ret = local->ops->sched_scan_start(&local->hw, &sdata->vif, @@ -361,7 +369,8 @@ static inline int drv_sched_scan_stop(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_sched_scan_stop(local, sdata); ret = local->ops->sched_scan_stop(&local->hw, &sdata->vif); @@ -462,7 +471,8 @@ static inline void drv_sta_notify(struct ieee80211_local *local, struct ieee80211_sta *sta) { sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_sta_notify(local, sdata, cmd, sta); if (local->ops->sta_notify) @@ -479,7 +489,8 @@ static inline int drv_sta_add(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_sta_add(local, sdata, sta); if (local->ops->sta_add) @@ -497,7 +508,8 @@ static inline void drv_sta_remove(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_sta_remove(local, sdata, sta); if (local->ops->sta_remove) @@ -515,7 +527,8 @@ static inline void drv_sta_add_debugfs(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; if (local->ops->sta_add_debugfs) local->ops->sta_add_debugfs(&local->hw, &sdata->vif, @@ -545,7 +558,8 @@ static inline void drv_sta_pre_rcu_remove(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_sta_pre_rcu_remove(local, sdata, &sta->sta); if (local->ops->sta_pre_rcu_remove) @@ -566,7 +580,8 @@ int drv_sta_state(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state); if (local->ops->sta_state) { @@ -590,7 +605,8 @@ static inline void drv_sta_rc_update(struct ieee80211_local *local, struct ieee80211_sta *sta, u32 changed) { sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED && (sdata->vif.type != NL80211_IFTYPE_ADHOC && @@ -612,7 +628,8 @@ static inline int drv_conf_tx(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_conf_tx(local, sdata, ac, params); if (local->ops->conf_tx) @@ -629,7 +646,8 @@ static inline u64 drv_get_tsf(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return ret; trace_drv_get_tsf(local, sdata); if (local->ops->get_tsf) @@ -644,7 +662,8 @@ static inline void drv_set_tsf(struct ieee80211_local *local, { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_set_tsf(local, sdata, tsf); if (local->ops->set_tsf) @@ -657,7 +676,8 @@ static inline void drv_reset_tsf(struct ieee80211_local *local, { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_reset_tsf(local, sdata); if (local->ops->reset_tsf) @@ -689,7 +709,8 @@ static inline int drv_ampdu_action(struct ieee80211_local *local, might_sleep(); sdata = get_bss_sdata(sdata); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_ampdu_action(local, sdata, action, sta, tid, ssn, buf_size); @@ -726,13 +747,19 @@ static inline void drv_rfkill_poll(struct ieee80211_local *local) } static inline void drv_flush(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata, u32 queues, bool drop) { + struct ieee80211_vif *vif = sdata ? &sdata->vif : NULL; + might_sleep(); + if (sdata && !check_sdata_in_driver(sdata)) + return; + trace_drv_flush(local, queues, drop); if (local->ops->flush) - local->ops->flush(&local->hw, queues, drop); + local->ops->flush(&local->hw, vif, queues, drop); trace_drv_return_void(local); } @@ -848,7 +875,8 @@ static inline int drv_set_bitrate_mask(struct ieee80211_local *local, might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_set_bitrate_mask(local, sdata, mask); if (local->ops->set_bitrate_mask) @@ -863,7 +891,8 @@ static inline void drv_set_rekey_data(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, struct cfg80211_gtk_rekey_data *data) { - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_set_rekey_data(local, sdata, data); if (local->ops->set_rekey_data) @@ -931,7 +960,8 @@ static inline void drv_mgd_prepare_tx(struct ieee80211_local *local, { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION); trace_drv_mgd_prepare_tx(local, sdata); @@ -958,6 +988,9 @@ static inline int drv_add_chanctx(struct ieee80211_local *local, static inline void drv_remove_chanctx(struct ieee80211_local *local, struct ieee80211_chanctx *ctx) { + if (WARN_ON(!ctx->driver_present)) + return; + trace_drv_remove_chanctx(local, ctx); if (local->ops->remove_chanctx) local->ops->remove_chanctx(&local->hw, &ctx->conf); @@ -983,7 +1016,8 @@ static inline int drv_assign_vif_chanctx(struct ieee80211_local *local, { int ret = 0; - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_assign_vif_chanctx(local, sdata, ctx); if (local->ops->assign_vif_chanctx) { @@ -1001,7 +1035,8 @@ static inline void drv_unassign_vif_chanctx(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, struct ieee80211_chanctx *ctx) { - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_unassign_vif_chanctx(local, sdata, ctx); if (local->ops->unassign_vif_chanctx) { @@ -1013,12 +1048,66 @@ static inline void drv_unassign_vif_chanctx(struct ieee80211_local *local, trace_drv_return_void(local); } +static inline int +drv_switch_vif_chanctx(struct ieee80211_local *local, + struct ieee80211_vif_chanctx_switch *vifs, + int n_vifs, + enum ieee80211_chanctx_switch_mode mode) +{ + int ret = 0; + int i; + + if (!local->ops->switch_vif_chanctx) + return -EOPNOTSUPP; + + for (i = 0; i < n_vifs; i++) { + struct ieee80211_chanctx *new_ctx = + container_of(vifs[i].new_ctx, + struct ieee80211_chanctx, + conf); + struct ieee80211_chanctx *old_ctx = + container_of(vifs[i].old_ctx, + struct ieee80211_chanctx, + conf); + + WARN_ON_ONCE(!old_ctx->driver_present); + WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS && + new_ctx->driver_present) || + (mode == CHANCTX_SWMODE_REASSIGN_VIF && + !new_ctx->driver_present)); + } + + trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode); + ret = local->ops->switch_vif_chanctx(&local->hw, + vifs, n_vifs, mode); + trace_drv_return_int(local, ret); + + if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) { + for (i = 0; i < n_vifs; i++) { + struct ieee80211_chanctx *new_ctx = + container_of(vifs[i].new_ctx, + struct ieee80211_chanctx, + conf); + struct ieee80211_chanctx *old_ctx = + container_of(vifs[i].old_ctx, + struct ieee80211_chanctx, + conf); + + new_ctx->driver_present = true; + old_ctx->driver_present = false; + } + } + + return ret; +} + static inline int drv_start_ap(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { int ret = 0; - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_start_ap(local, sdata, &sdata->vif.bss_conf); if (local->ops->start_ap) @@ -1030,7 +1119,8 @@ static inline int drv_start_ap(struct ieee80211_local *local, static inline void drv_stop_ap(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_stop_ap(local, sdata); if (local->ops->stop_ap) @@ -1053,7 +1143,8 @@ drv_set_default_unicast_key(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, int key_idx) { - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; WARN_ON_ONCE(key_idx < -1 || key_idx > 3); @@ -1095,7 +1186,8 @@ static inline int drv_join_ibss(struct ieee80211_local *local, int ret = 0; might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return -EIO; trace_drv_join_ibss(local, sdata, &sdata->vif.bss_conf); if (local->ops->join_ibss) @@ -1108,7 +1200,8 @@ static inline void drv_leave_ibss(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { might_sleep(); - check_sdata_in_driver(sdata); + if (!check_sdata_in_driver(sdata)) + return; trace_drv_leave_ibss(local, sdata); if (local->ops->leave_ibss) @@ -1116,4 +1209,17 @@ static inline void drv_leave_ibss(struct ieee80211_local *local, trace_drv_return_void(local); } +static inline u32 drv_get_expected_throughput(struct ieee80211_local *local, + struct ieee80211_sta *sta) +{ + u32 ret = 0; + + trace_drv_get_expected_throughput(sta); + if (local->ops->get_expected_throughput) + ret = local->ops->get_expected_throughput(sta); + trace_drv_return_u32(local, ret); + + return ret; +} + #endif /* __MAC80211_DRIVER_OPS */ diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c index c150b68436d7..15702ff64a4c 100644 --- a/net/mac80211/ht.c +++ b/net/mac80211/ht.c @@ -31,6 +31,18 @@ static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, } } +static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, + struct ieee80211_ht_cap *ht_capa_mask, + struct ieee80211_sta_ht_cap *ht_cap, + u16 flag) +{ + __le16 le_flag = cpu_to_le16(flag); + + if ((ht_capa_mask->cap_info & le_flag) && + (ht_capa->cap_info & le_flag)) + ht_cap->cap |= flag; +} + void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, struct ieee80211_sta_ht_cap *ht_cap) { @@ -59,7 +71,7 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); /* NOTE: If you add more over-rides here, update register_hw - * ht_capa_mod_msk logic in main.c as well. + * ht_capa_mod_mask logic in main.c as well. * And, if this method can ever change ht_cap.ht_supported, fix * the check in ieee80211_add_ht_ie. */ @@ -86,6 +98,14 @@ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU); + /* Allow user to disable LDPC */ + __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, + IEEE80211_HT_CAP_LDPC_CODING); + + /* Allow user to enable 40 MHz intolerant bit. */ + __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, + IEEE80211_HT_CAP_40MHZ_INTOLERANT); + /* Allow user to decrease AMPDU factor */ if (ht_capa_mask->ampdu_params_info & IEEE80211_HT_AMPDU_PARM_FACTOR) { diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 06d28787945b..18ee0a256b1e 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -143,7 +143,7 @@ ieee80211_ibss_build_presp(struct ieee80211_sub_if_data *sdata, *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); + sdata->csa_counter_offset_beacon[0] = (pos - presp->head); *pos++ = csa_settings->count; } @@ -228,7 +228,7 @@ 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; - bool radar_required = false; + bool radar_required; int err; sdata_assert_lock(sdata); @@ -253,7 +253,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, presp = rcu_dereference_protected(ifibss->presp, lockdep_is_held(&sdata->wdev.mtx)); - rcu_assign_pointer(ifibss->presp, NULL); + RCU_INIT_POINTER(ifibss->presp, NULL); if (presp) kfree_rcu(presp, rcu_head); @@ -262,7 +262,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, /* make a copy of the chandef, it could be modified below. */ chandef = *req_chandef; chan = chandef.chan; - if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { + if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, + NL80211_IFTYPE_ADHOC)) { if (chandef.width == NL80211_CHAN_WIDTH_5 || chandef.width == NL80211_CHAN_WIDTH_10 || chandef.width == NL80211_CHAN_WIDTH_20_NOHT || @@ -274,7 +275,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, chandef.width = NL80211_CHAN_WIDTH_20; chandef.center_freq1 = chan->center_freq; /* check again for downgraded chandef */ - if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef)) { + if (!cfg80211_reg_can_beacon(local->hw.wiphy, &chandef, + NL80211_IFTYPE_ADHOC)) { sdata_info(sdata, "Failed to join IBSS, beacons forbidden\n"); return; @@ -282,21 +284,20 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, } err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, - &chandef); + &chandef, NL80211_IFTYPE_ADHOC); if (err < 0) { sdata_info(sdata, "Failed to join IBSS, invalid chandef\n"); return; } - if (err > 0) { - if (!ifibss->userspace_handles_dfs) { - sdata_info(sdata, - "Failed to join IBSS, DFS channel without control program\n"); - return; - } - radar_required = true; + if (err > 0 && !ifibss->userspace_handles_dfs) { + sdata_info(sdata, + "Failed to join IBSS, DFS channel without control program\n"); + return; } + radar_required = err; + mutex_lock(&local->mtx); if (ieee80211_vif_use_channel(sdata, &chandef, ifibss->fixed_channel ? @@ -775,7 +776,8 @@ static void ieee80211_ibss_csa_mark_radar(struct ieee80211_sub_if_data *sdata) * unavailable. */ err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, - &ifibss->chandef); + &ifibss->chandef, + NL80211_IFTYPE_ADHOC); if (err > 0) cfg80211_radar_event(sdata->local->hw.wiphy, &ifibss->chandef, GFP_ATOMIC); @@ -861,7 +863,8 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, goto disconnect; } - if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef)) { + if (!cfg80211_reg_can_beacon(sdata->local->hw.wiphy, ¶ms.chandef, + NL80211_IFTYPE_ADHOC)) { sdata_info(sdata, "IBSS %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", ifibss->bssid, @@ -873,17 +876,17 @@ ieee80211_ibss_process_chanswitch(struct ieee80211_sub_if_data *sdata, } err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, - ¶ms.chandef); + ¶ms.chandef, + NL80211_IFTYPE_ADHOC); if (err < 0) goto disconnect; - if (err) { + if (err > 0 && !ifibss->userspace_handles_dfs) { /* IBSS-DFS only allowed with a control program */ - if (!ifibss->userspace_handles_dfs) - goto disconnect; - - params.radar_required = true; + goto disconnect; } + params.radar_required = err; + if (cfg80211_chandef_identical(¶ms.chandef, &sdata->vif.bss_conf.chandef)) { ibss_dbg(sdata, @@ -1636,7 +1639,33 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, u32 changed = 0; u32 rate_flags; struct ieee80211_supported_band *sband; + enum ieee80211_chanctx_mode chanmode; + struct ieee80211_local *local = sdata->local; + int radar_detect_width = 0; int i; + int ret; + + ret = cfg80211_chandef_dfs_required(local->hw.wiphy, + ¶ms->chandef, + sdata->wdev.iftype); + if (ret < 0) + return ret; + + if (ret > 0) { + if (!params->userspace_handles_dfs) + return -EINVAL; + radar_detect_width = BIT(params->chandef.width); + } + + chanmode = (params->channel_fixed && !ret) ? + IEEE80211_CHANCTX_SHARED : IEEE80211_CHANCTX_EXCLUSIVE; + + mutex_lock(&local->chanctx_mtx); + ret = ieee80211_check_combinations(sdata, ¶ms->chandef, chanmode, + radar_detect_width); + mutex_unlock(&local->chanctx_mtx); + if (ret < 0) + return ret; if (params->bssid) { memcpy(sdata->u.ibss.bssid, params->bssid, ETH_ALEN); @@ -1648,10 +1677,11 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, sdata->u.ibss.control_port = params->control_port; sdata->u.ibss.userspace_handles_dfs = params->userspace_handles_dfs; sdata->u.ibss.basic_rates = params->basic_rates; + sdata->u.ibss.last_scan_completed = jiffies; /* fix basic_rates if channel does not support these rates */ rate_flags = ieee80211_chandef_rate_flags(¶ms->chandef); - sband = sdata->local->hw.wiphy->bands[params->chandef.chan->band]; + sband = local->hw.wiphy->bands[params->chandef.chan->band]; for (i = 0; i < sband->n_bitrates; i++) { if ((rate_flags & sband->bitrates[i].flags) != rate_flags) sdata->u.ibss.basic_rates &= ~BIT(i); @@ -1700,9 +1730,9 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata, ieee80211_bss_info_change_notify(sdata, changed); sdata->smps_mode = IEEE80211_SMPS_OFF; - sdata->needed_rx_chains = sdata->local->rx_chains; + sdata->needed_rx_chains = local->rx_chains; - ieee80211_queue_work(&sdata->local->hw, &sdata->work); + ieee80211_queue_work(&local->hw, &sdata->work); return 0; } diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index f169b6ee94ee..ac9836e0aab3 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -260,7 +260,7 @@ struct ieee80211_if_ap { /* to be used after channel switch. */ struct cfg80211_beacon_data *next_beacon; - struct list_head vlans; + struct list_head vlans; /* write-protected with RTNL and local->mtx */ struct ps_data ps; atomic_t num_mcast_sta; /* number of stations receiving multicast */ @@ -276,7 +276,7 @@ struct ieee80211_if_wds { }; struct ieee80211_if_vlan { - struct list_head list; + struct list_head list; /* write-protected with RTNL and local->mtx */ /* used for all tx if the VLAN is configured to 4-addr mode */ struct sta_info __rcu *sta; @@ -692,8 +692,10 @@ struct ieee80211_chanctx { struct list_head list; struct rcu_head rcu_head; + struct list_head assigned_vifs; + struct list_head reserved_vifs; + enum ieee80211_chanctx_mode mode; - int refcount; bool driver_present; struct ieee80211_chanctx_conf conf; @@ -752,11 +754,21 @@ struct ieee80211_sub_if_data { struct mac80211_qos_map __rcu *qos_map; struct work_struct csa_finalize_work; - int csa_counter_offset_beacon; - int csa_counter_offset_presp; + u16 csa_counter_offset_beacon[IEEE80211_MAX_CSA_COUNTERS_NUM]; + u16 csa_counter_offset_presp[IEEE80211_MAX_CSA_COUNTERS_NUM]; bool csa_radar_required; + bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */ struct cfg80211_chan_def csa_chandef; + struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */ + struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */ + + /* context reservation -- protected with chanctx_mtx */ + struct ieee80211_chanctx *reserved_chanctx; + struct cfg80211_chan_def reserved_chandef; + bool reserved_radar_required; + u8 csa_current_counter; + /* used to reconfigure hardware SM PS */ struct work_struct recalc_smps; @@ -1449,6 +1461,7 @@ __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, struct cfg80211_sched_scan_request *req); int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata); +void ieee80211_sched_scan_end(struct ieee80211_local *local); void ieee80211_sched_scan_stopped_work(struct work_struct *work); /* off-channel helpers */ @@ -1463,6 +1476,7 @@ void ieee80211_sw_roc_work(struct work_struct *work); void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc); /* channel switch handling */ +bool ieee80211_csa_needs_block_tx(struct ieee80211_local *local); void ieee80211_csa_finalize_work(struct work_struct *work); int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_csa_settings *params); @@ -1772,6 +1786,16 @@ ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, const struct cfg80211_chan_def *chandef, enum ieee80211_chanctx_mode mode); int __must_check +ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode mode, + bool radar_required); +int __must_check +ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata, + u32 *changed); +int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata); + +int __must_check ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, const struct cfg80211_chan_def *chandef, u32 *changed); @@ -1783,6 +1807,8 @@ void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, bool clear); +int ieee80211_chanctx_refcount(struct ieee80211_local *local, + struct ieee80211_chanctx *ctx); void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, struct ieee80211_chanctx *chanctx); @@ -1806,6 +1832,20 @@ int ieee80211_cs_headroom(struct ieee80211_local *local, enum nl80211_iftype iftype); void ieee80211_recalc_dtim(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata); +int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode chanmode, + u8 radar_detect); +int ieee80211_max_num_channels(struct ieee80211_local *local); + +/* TDLS */ +int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, u8 action_code, u8 dialog_token, + u16 status_code, u32 peer_capability, + const u8 *extra_ies, size_t extra_ies_len); +int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, enum nl80211_tdls_operation oper); + #ifdef CONFIG_MAC80211_NOINLINE #define debug_noinline noinline diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index b8d331e7d883..388b863e821c 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -250,6 +250,7 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, { struct ieee80211_local *local = sdata->local; struct ieee80211_sub_if_data *nsdata; + int ret; ASSERT_RTNL(); @@ -300,7 +301,10 @@ static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata, } } - return 0; + mutex_lock(&local->chanctx_mtx); + ret = ieee80211_check_combinations(sdata, NULL, 0, 0); + mutex_unlock(&local->chanctx_mtx); + return ret; } static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata, @@ -395,6 +399,7 @@ int ieee80211_add_virtual_monitor(struct ieee80211_local *local) sdata->vif.type = NL80211_IFTYPE_MONITOR; snprintf(sdata->name, IFNAMSIZ, "%s-monitor", wiphy_name(local->hw.wiphy)); + sdata->wdev.iftype = NL80211_IFTYPE_MONITOR; sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; @@ -423,7 +428,7 @@ int ieee80211_add_virtual_monitor(struct ieee80211_local *local) mutex_unlock(&local->mtx); if (ret) { mutex_lock(&local->iflist_mtx); - rcu_assign_pointer(local->monitor_sdata, NULL); + RCU_INIT_POINTER(local->monitor_sdata, NULL); mutex_unlock(&local->iflist_mtx); synchronize_net(); drv_remove_interface(local, sdata); @@ -452,7 +457,7 @@ void ieee80211_del_virtual_monitor(struct ieee80211_local *local) return; } - rcu_assign_pointer(local->monitor_sdata, NULL); + RCU_INIT_POINTER(local->monitor_sdata, NULL); mutex_unlock(&local->iflist_mtx); synchronize_net(); @@ -492,7 +497,9 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) if (!sdata->bss) return -ENOLINK; + mutex_lock(&local->mtx); list_add(&sdata->u.vlan.list, &sdata->bss->vlans); + mutex_unlock(&local->mtx); master = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); @@ -722,8 +729,11 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) drv_stop(local); err_del_bss: sdata->bss = NULL; - if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) + if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { + mutex_lock(&local->mtx); list_del(&sdata->u.vlan.list); + mutex_unlock(&local->mtx); + } /* might already be clear but that doesn't matter */ clear_bit(SDATA_STATE_RUNNING, &sdata->state); return res; @@ -829,8 +839,15 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, cancel_work_sync(&sdata->recalc_smps); sdata_lock(sdata); + mutex_lock(&local->mtx); sdata->vif.csa_active = false; + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); + mutex_unlock(&local->mtx); sdata_unlock(sdata); + cancel_work_sync(&sdata->csa_finalize_work); cancel_delayed_work_sync(&sdata->dfs_cac_timer_work); @@ -875,8 +892,10 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, switch (sdata->vif.type) { case NL80211_IFTYPE_AP_VLAN: + mutex_lock(&local->mtx); list_del(&sdata->u.vlan.list); - rcu_assign_pointer(sdata->vif.chanctx_conf, NULL); + mutex_unlock(&local->mtx); + RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL); /* no need to tell driver */ break; case NL80211_IFTYPE_MONITOR: @@ -895,7 +914,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, break; case NL80211_IFTYPE_P2P_DEVICE: /* relies on synchronize_rcu() below */ - rcu_assign_pointer(local->p2p_sdata, NULL); + RCU_INIT_POINTER(local->p2p_sdata, NULL); /* fall through */ default: cancel_work_sync(&sdata->work); @@ -1267,6 +1286,7 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE); sdata->control_port_no_encrypt = false; sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; + sdata->vif.bss_conf.idle = true; sdata->noack_map = 0; @@ -1280,6 +1300,8 @@ static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata, INIT_WORK(&sdata->work, ieee80211_iface_work); INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work); INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work); + INIT_LIST_HEAD(&sdata->assigned_chanctx_list); + INIT_LIST_HEAD(&sdata->reserved_chanctx_list); switch (type) { case NL80211_IFTYPE_P2P_GO: @@ -1758,7 +1780,6 @@ void ieee80211_remove_interfaces(struct ieee80211_local *local) } mutex_unlock(&local->iflist_mtx); unregister_netdevice_many(&unreg_list); - list_del(&unreg_list); list_for_each_entry_safe(sdata, tmp, &wdev_list, list) { list_del(&sdata->list); @@ -1774,20 +1795,19 @@ static int netdev_notify(struct notifier_block *nb, struct ieee80211_sub_if_data *sdata; if (state != NETDEV_CHANGENAME) - return 0; + return NOTIFY_DONE; if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy) - return 0; + return NOTIFY_DONE; if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) - return 0; + return NOTIFY_DONE; sdata = IEEE80211_DEV_TO_SUB_IF(dev); - memcpy(sdata->name, dev->name, IFNAMSIZ); - ieee80211_debugfs_rename_netdev(sdata); - return 0; + + return NOTIFY_OK; } static struct notifier_block mac80211_netdev_notifier = { diff --git a/net/mac80211/key.c b/net/mac80211/key.c index 6ff65a1ebaa9..16d97f044a20 100644 --- a/net/mac80211/key.c +++ b/net/mac80211/key.c @@ -325,7 +325,8 @@ ieee80211_key_alloc(u32 cipher, int idx, size_t key_len, struct ieee80211_key *key; int i, j, err; - BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS); + if (WARN_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)) + return ERR_PTR(-EINVAL); key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL); if (!key) @@ -481,8 +482,8 @@ int ieee80211_key_link(struct ieee80211_key *key, int idx, ret; bool pairwise; - BUG_ON(!sdata); - BUG_ON(!key); + if (WARN_ON(!sdata || !key)) + return -EINVAL; pairwise = key->conf.flags & IEEE80211_KEY_FLAG_PAIRWISE; idx = key->conf.keyidx; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 4c1bf61bc778..d17c26d6e369 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -340,7 +340,7 @@ static int ieee80211_ifa_changed(struct notifier_block *nb, sdata_unlock(sdata); - return NOTIFY_DONE; + return NOTIFY_OK; } #endif @@ -371,7 +371,7 @@ static int ieee80211_ifa6_changed(struct notifier_block *nb, drv_ipv6_addr_change(local, sdata, idev); - return NOTIFY_DONE; + return NOTIFY_OK; } #endif @@ -446,7 +446,9 @@ static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | IEEE80211_HT_CAP_MAX_AMSDU | IEEE80211_HT_CAP_SGI_20 | - IEEE80211_HT_CAP_SGI_40), + IEEE80211_HT_CAP_SGI_40 | + IEEE80211_HT_CAP_LDPC_CODING | + IEEE80211_HT_CAP_40MHZ_INTOLERANT), .mcs = { .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, @@ -954,6 +956,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; + local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; + result = wiphy_register(local->hw.wiphy); if (result < 0) goto fail_wiphy_register; diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index f70e9cd10552..6495a3f0428d 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -366,20 +366,15 @@ int mesh_add_rsn_ie(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) return 0; /* find RSN IE */ - data = ifmsh->ie; - while (data < ifmsh->ie + ifmsh->ie_len) { - if (*data == WLAN_EID_RSN) { - len = data[1] + 2; - break; - } - data++; - } + data = cfg80211_find_ie(WLAN_EID_RSN, ifmsh->ie, ifmsh->ie_len); + if (!data) + return 0; - if (len) { - if (skb_tailroom(skb) < len) - return -ENOMEM; - memcpy(skb_put(skb, len), data, len); - } + len = data[1] + 2; + + if (skb_tailroom(skb) < len) + return -ENOMEM; + memcpy(skb_put(skb, len), data, len); return 0; } @@ -684,7 +679,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh) *pos++ = 0x0; *pos++ = ieee80211_frequency_to_channel( csa->settings.chandef.chan->center_freq); - sdata->csa_counter_offset_beacon = hdr_len + 6; + sdata->csa_counter_offset_beacon[0] = hdr_len + 6; *pos++ = csa->settings.count; *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; *pos++ = 6; @@ -829,7 +824,7 @@ void ieee80211_stop_mesh(struct ieee80211_sub_if_data *sdata) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED); bcn = rcu_dereference_protected(ifmsh->beacon, lockdep_is_held(&sdata->wdev.mtx)); - rcu_assign_pointer(ifmsh->beacon, NULL); + RCU_INIT_POINTER(ifmsh->beacon, NULL); kfree_rcu(bcn, rcu_head); /* flush STAs and mpaths on this iface */ @@ -903,14 +898,15 @@ ieee80211_mesh_process_chnswitch(struct ieee80211_sub_if_data *sdata, } err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, - ¶ms.chandef); + ¶ms.chandef, + NL80211_IFTYPE_MESH_POINT); if (err < 0) return false; - if (err) { - params.radar_required = true; + if (err > 0) /* TODO: DFS not (yet) supported */ return false; - } + + params.radar_required = err; if (cfg80211_chandef_identical(¶ms.chandef, &sdata->vif.bss_conf.chandef)) { @@ -1068,7 +1064,7 @@ int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) /* Remove the CSA and MCSP elements from the beacon */ tmp_csa_settings = rcu_dereference(ifmsh->csa); - rcu_assign_pointer(ifmsh->csa, NULL); + RCU_INIT_POINTER(ifmsh->csa, NULL); if (tmp_csa_settings) kfree_rcu(tmp_csa_settings, rcu_head); ret = ieee80211_mesh_rebuild_beacon(sdata); @@ -1102,7 +1098,7 @@ int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata, ret = ieee80211_mesh_rebuild_beacon(sdata); if (ret) { tmp_csa_settings = rcu_dereference(ifmsh->csa); - rcu_assign_pointer(ifmsh->csa, NULL); + RCU_INIT_POINTER(ifmsh->csa, NULL); kfree_rcu(tmp_csa_settings, rcu_head); return ret; } diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c index f9514685d45a..94758b9c9ed4 100644 --- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -37,7 +37,7 @@ static inline u32 u32_field_get(const u8 *preq_elem, int offset, bool ae) return get_unaligned_le32(preq_elem + offset); } -static inline u32 u16_field_get(const u8 *preq_elem, int offset, bool ae) +static inline u16 u16_field_get(const u8 *preq_elem, int offset, bool ae) { if (ae) offset += 6; @@ -544,9 +544,10 @@ static void hwmp_preq_frame_process(struct ieee80211_sub_if_data *sdata, if (time_after(jiffies, ifmsh->last_sn_update + net_traversal_jiffies(sdata)) || time_before(jiffies, ifmsh->last_sn_update)) { - target_sn = ++ifmsh->sn; + ++ifmsh->sn; ifmsh->last_sn_update = jiffies; } + target_sn = ifmsh->sn; } else if (is_broadcast_ether_addr(target_addr) && (target_flags & IEEE80211_PREQ_TO_FLAG)) { rcu_read_lock(); diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c index 7d050ed6fe5a..cf032a8db9d7 100644 --- a/net/mac80211/mesh_pathtbl.c +++ b/net/mac80211/mesh_pathtbl.c @@ -287,8 +287,10 @@ static void mesh_path_move_to_queue(struct mesh_path *gate_mpath, struct sk_buff_head failq; unsigned long flags; - BUG_ON(gate_mpath == from_mpath); - BUG_ON(!gate_mpath->next_hop); + if (WARN_ON(gate_mpath == from_mpath)) + return; + if (WARN_ON(!gate_mpath->next_hop)) + return; __skb_queue_head_init(&failq); diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index 2bc5dc25d5ad..09625d6205c3 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -171,7 +171,7 @@ static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata, u8 cap; WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET); - BUG_ON(!rcu_read_lock_held()); + WARN_ON(!rcu_read_lock_held()); cap = beacon->meshconf->meshconf_cap; spin_lock_bh(&ifmsh->sync_offset_lock); diff --git a/net/mac80211/michael.h b/net/mac80211/michael.h index 3b848dad9587..0e4886f881f1 100644 --- a/net/mac80211/michael.h +++ b/net/mac80211/michael.h @@ -11,6 +11,7 @@ #define MICHAEL_H #include <linux/types.h> +#include <linux/ieee80211.h> #define MICHAEL_MIC_LEN 8 diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 27600a9808ba..3345401be1b3 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -975,16 +975,23 @@ static void ieee80211_chswitch_work(struct work_struct *work) /* XXX: shouldn't really modify cfg80211-owned data! */ ifmgd->associated->channel = sdata->csa_chandef.chan; + ieee80211_bss_info_change_notify(sdata, changed); + + mutex_lock(&local->mtx); + sdata->vif.csa_active = false; /* XXX: wait for a beacon first? */ - ieee80211_wake_queues_by_reason(&local->hw, + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); + mutex_unlock(&local->mtx); - ieee80211_bss_info_change_notify(sdata, changed); - - out: - sdata->vif.csa_active = false; ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED; + + ieee80211_sta_reset_beacon_monitor(sdata); + ieee80211_sta_reset_conn_monitor(sdata); + +out: sdata_unlock(sdata); } @@ -1089,7 +1096,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, } chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf), struct ieee80211_chanctx, conf); - if (chanctx->refcount > 1) { + if (ieee80211_chanctx_refcount(local, chanctx) > 1) { sdata_info(sdata, "channel switch with multiple interfaces on the same channel, disconnecting\n"); ieee80211_queue_work(&local->hw, @@ -1100,12 +1107,16 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata, mutex_unlock(&local->chanctx_mtx); sdata->csa_chandef = csa_ie.chandef; + + mutex_lock(&local->mtx); sdata->vif.csa_active = true; + sdata->csa_block_tx = csa_ie.mode; - if (csa_ie.mode) + if (sdata->csa_block_tx) ieee80211_stop_queues_by_reason(&local->hw, - IEEE80211_MAX_QUEUE_MAP, - IEEE80211_QUEUE_STOP_REASON_CSA); + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); + mutex_unlock(&local->mtx); if (local->ops->channel_switch) { /* use driver's channel switch callback */ @@ -1817,6 +1828,12 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, ifmgd->flags = 0; mutex_lock(&local->mtx); ieee80211_vif_release_channel(sdata); + + sdata->vif.csa_active = false; + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, + IEEE80211_MAX_QUEUE_MAP, + IEEE80211_QUEUE_STOP_REASON_CSA); mutex_unlock(&local->mtx); sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM; @@ -2045,6 +2062,7 @@ EXPORT_SYMBOL(ieee80211_ap_probereq_get); static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) { + struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; @@ -2058,10 +2076,14 @@ 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; + + mutex_lock(&local->mtx); sdata->vif.csa_active = false; - ieee80211_wake_queues_by_reason(&sdata->local->hw, + if (!ieee80211_csa_needs_block_tx(local)) + ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_CSA); + mutex_unlock(&local->mtx); cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN); @@ -3546,6 +3568,9 @@ static void ieee80211_sta_bcn_mon_timer(unsigned long data) if (local->quiescing) return; + if (sdata->vif.csa_active) + return; + sdata->u.mgd.connection_loss = false; ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.beacon_connection_loss_work); @@ -3561,6 +3586,9 @@ static void ieee80211_sta_conn_mon_timer(unsigned long data) if (local->quiescing) return; + if (sdata->vif.csa_active) + return; + ieee80211_queue_work(&local->hw, &ifmgd->monitor_work); } @@ -3707,7 +3735,7 @@ int ieee80211_max_network_latency(struct notifier_block *nb, ieee80211_recalc_ps(local, latency_usec); mutex_unlock(&local->iflist_mtx); - return 0; + return NOTIFY_OK; } static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata, diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index 26fd94fa0aed..1c1469c36dca 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -657,6 +657,17 @@ minstrel_free(void *priv) kfree(priv); } +static u32 minstrel_get_expected_throughput(void *priv_sta) +{ + struct minstrel_sta_info *mi = priv_sta; + int idx = mi->max_tp_rate[0]; + + /* convert pkt per sec in kbps (1200 is the average pkt size used for + * computing cur_tp + */ + return MINSTREL_TRUNC(mi->r[idx].cur_tp) * 1200 * 8 / 1024; +} + const struct rate_control_ops mac80211_minstrel = { .name = "minstrel", .tx_status = minstrel_tx_status, @@ -670,6 +681,7 @@ const struct rate_control_ops mac80211_minstrel = { .add_sta_debugfs = minstrel_add_sta_debugfs, .remove_sta_debugfs = minstrel_remove_sta_debugfs, #endif + .get_expected_throughput = minstrel_get_expected_throughput, }; int __init diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index bccaf854a309..85c1e74b7714 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -22,7 +22,7 @@ #define MCS_NBITS (AVG_PKT_SIZE << 3) /* Number of symbols for a packet with (bps) bits per symbol */ -#define MCS_NSYMS(bps) ((MCS_NBITS + (bps) - 1) / (bps)) +#define MCS_NSYMS(bps) DIV_ROUND_UP(MCS_NBITS, (bps)) /* Transmission time (nanoseconds) for a packet containing (syms) symbols */ #define MCS_SYMBOL_TIME(sgi, syms) \ @@ -226,8 +226,9 @@ minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int group, int rate) nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len); nsecs += minstrel_mcs_groups[group].duration[rate]; - tp = 1000000 * ((prob * 1000) / nsecs); + /* prob is scaled - see MINSTREL_FRAC above */ + tp = 1000000 * ((prob * 1000) / nsecs); mr->cur_tp = MINSTREL_TRUNC(tp); } @@ -1031,6 +1032,22 @@ minstrel_ht_free(void *priv) mac80211_minstrel.free(priv); } +static u32 minstrel_ht_get_expected_throughput(void *priv_sta) +{ + struct minstrel_ht_sta_priv *msp = priv_sta; + struct minstrel_ht_sta *mi = &msp->ht; + int i, j; + + if (!msp->is_ht) + return mac80211_minstrel.get_expected_throughput(priv_sta); + + i = mi->max_tp_rate / MCS_GROUP_RATES; + j = mi->max_tp_rate % MCS_GROUP_RATES; + + /* convert cur_tp from pkt per second in kbps */ + return mi->groups[i].rates[j].cur_tp * AVG_PKT_SIZE * 8 / 1024; +} + static const struct rate_control_ops mac80211_minstrel_ht = { .name = "minstrel_ht", .tx_status = minstrel_ht_tx_status, @@ -1045,6 +1062,7 @@ static const struct rate_control_ops mac80211_minstrel_ht = { .add_sta_debugfs = minstrel_ht_add_sta_debugfs, .remove_sta_debugfs = minstrel_ht_remove_sta_debugfs, #endif + .get_expected_throughput = minstrel_ht_get_expected_throughput, }; diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 2b608b2b70ec..394e201cde6d 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -54,24 +54,25 @@ static struct sk_buff *remove_monitor_info(struct ieee80211_local *local, return skb; } -static inline int should_drop_frame(struct sk_buff *skb, int present_fcs_len) +static inline bool should_drop_frame(struct sk_buff *skb, int present_fcs_len) { struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); - struct ieee80211_hdr *hdr; - - hdr = (void *)(skb->data); + struct ieee80211_hdr *hdr = (void *)skb->data; if (status->flag & (RX_FLAG_FAILED_FCS_CRC | RX_FLAG_FAILED_PLCP_CRC | RX_FLAG_AMPDU_IS_ZEROLEN)) - return 1; + return true; + if (unlikely(skb->len < 16 + present_fcs_len)) - return 1; + return true; + if (ieee80211_is_ctl(hdr->frame_control) && !ieee80211_is_pspoll(hdr->frame_control) && !ieee80211_is_back_req(hdr->frame_control)) - return 1; - return 0; + return true; + + return false; } static int @@ -3191,7 +3192,7 @@ static bool ieee80211_prepare_and_rx_handle(struct ieee80211_rx_data *rx, } /* - * This is the actual Rx frames handler. as it blongs to Rx path it must + * This is the actual Rx frames handler. as it belongs to Rx path it must * be called with rcu_read_lock protection. */ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw, diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 3ce7f2c8539a..f40661eb75b5 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -309,7 +309,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) if (local->scan_req != local->int_scan_req) cfg80211_scan_done(local->scan_req, aborted); local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); local->scanning = 0; local->scan_chandef.chan = NULL; @@ -559,7 +559,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, ieee80211_recalc_idle(local); local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); } return rc; @@ -773,7 +773,7 @@ void ieee80211_scan_work(struct work_struct *work) int rc; local->scan_req = NULL; - rcu_assign_pointer(local->scan_sdata, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); rc = __ieee80211_start_scan(sdata, req); if (rc) { @@ -1014,7 +1014,7 @@ out_free: if (ret) { /* Clean in case of failure after HW restart or upon resume. */ - rcu_assign_pointer(local->sched_scan_sdata, NULL); + RCU_INIT_POINTER(local->sched_scan_sdata, NULL); local->sched_scan_req = NULL; } @@ -1076,12 +1076,8 @@ void ieee80211_sched_scan_results(struct ieee80211_hw *hw) } EXPORT_SYMBOL(ieee80211_sched_scan_results); -void ieee80211_sched_scan_stopped_work(struct work_struct *work) +void ieee80211_sched_scan_end(struct ieee80211_local *local) { - struct ieee80211_local *local = - container_of(work, struct ieee80211_local, - sched_scan_stopped_work); - mutex_lock(&local->mtx); if (!rcu_access_pointer(local->sched_scan_sdata)) { @@ -1089,7 +1085,7 @@ void ieee80211_sched_scan_stopped_work(struct work_struct *work) return; } - rcu_assign_pointer(local->sched_scan_sdata, NULL); + RCU_INIT_POINTER(local->sched_scan_sdata, NULL); /* If sched scan was aborted by the driver. */ local->sched_scan_req = NULL; @@ -1099,6 +1095,15 @@ void ieee80211_sched_scan_stopped_work(struct work_struct *work) cfg80211_sched_scan_stopped(local->hw.wiphy); } +void ieee80211_sched_scan_stopped_work(struct work_struct *work) +{ + struct ieee80211_local *local = + container_of(work, struct ieee80211_local, + sched_scan_stopped_work); + + ieee80211_sched_scan_end(local); +} + void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 847d92f6bef6..a9b46d8ea22f 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -240,6 +240,7 @@ void sta_info_free(struct ieee80211_local *local, struct sta_info *sta) sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr); + kfree(rcu_dereference_raw(sta->sta.rates)); kfree(sta); } @@ -552,7 +553,7 @@ static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU) int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) { struct ieee80211_local *local = sta->local; - int err = 0; + int err; might_sleep(); @@ -570,7 +571,6 @@ int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU) return 0; out_free: - BUG_ON(!err); sta_info_free(local, sta); return err; } diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 60cb7a665976..ba29ebc86141 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -541,6 +541,23 @@ static void ieee80211_tx_latency_end_msrmnt(struct ieee80211_local *local, */ #define STA_LOST_PKT_THRESHOLD 50 +static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + + /* This packet was aggregated but doesn't carry status info */ + if ((info->flags & IEEE80211_TX_CTL_AMPDU) && + !(info->flags & IEEE80211_TX_STAT_AMPDU)) + return; + + if (++sta->lost_packets < STA_LOST_PKT_THRESHOLD) + return; + + cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr, + sta->lost_packets, GFP_ATOMIC); + sta->lost_packets = 0; +} + void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) { struct sk_buff *skb2; @@ -680,12 +697,8 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) if (info->flags & IEEE80211_TX_STAT_ACK) { if (sta->lost_packets) sta->lost_packets = 0; - } else if (++sta->lost_packets >= STA_LOST_PKT_THRESHOLD) { - cfg80211_cqm_pktloss_notify(sta->sdata->dev, - sta->sta.addr, - sta->lost_packets, - GFP_ATOMIC); - sta->lost_packets = 0; + } else { + ieee80211_lost_packet(sta, skb); } } diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c new file mode 100644 index 000000000000..652813b2d3df --- /dev/null +++ b/net/mac80211/tdls.c @@ -0,0 +1,325 @@ +/* + * mac80211 TDLS handling code + * + * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> + * Copyright 2014, Intel Corporation + * + * This file is GPLv2 as found in COPYING. + */ + +#include <linux/ieee80211.h> +#include "ieee80211_i.h" + +static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb) +{ + u8 *pos = (void *)skb_put(skb, 7); + + *pos++ = WLAN_EID_EXT_CAPABILITY; + *pos++ = 5; /* len */ + *pos++ = 0x0; + *pos++ = 0x0; + *pos++ = 0x0; + *pos++ = 0x0; + *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; +} + +static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata) +{ + struct ieee80211_local *local = sdata->local; + u16 capab; + + capab = 0; + if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) + return capab; + + if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) + capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; + if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) + capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; + + return capab; +} + +static void ieee80211_tdls_add_link_ie(struct sk_buff *skb, const u8 *src_addr, + const u8 *peer, const u8 *bssid) +{ + struct ieee80211_tdls_lnkie *lnkid; + + lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); + + lnkid->ie_type = WLAN_EID_LINK_ID; + lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; + + memcpy(lnkid->bssid, bssid, ETH_ALEN); + memcpy(lnkid->init_sta, src_addr, ETH_ALEN); + memcpy(lnkid->resp_sta, peer, ETH_ALEN); +} + +static int +ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, u8 action_code, u8 dialog_token, + u16 status_code, struct sk_buff *skb) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + enum ieee80211_band band = ieee80211_get_sdata_band(sdata); + struct ieee80211_tdls_data *tf; + + tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); + + memcpy(tf->da, peer, ETH_ALEN); + memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); + tf->ether_type = cpu_to_be16(ETH_P_TDLS); + tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; + + switch (action_code) { + case WLAN_TDLS_SETUP_REQUEST: + tf->category = WLAN_CATEGORY_TDLS; + tf->action_code = WLAN_TDLS_SETUP_REQUEST; + + skb_put(skb, sizeof(tf->u.setup_req)); + tf->u.setup_req.dialog_token = dialog_token; + tf->u.setup_req.capability = + cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); + + ieee80211_add_srates_ie(sdata, skb, false, band); + ieee80211_add_ext_srates_ie(sdata, skb, false, band); + ieee80211_tdls_add_ext_capab(skb); + break; + case WLAN_TDLS_SETUP_RESPONSE: + tf->category = WLAN_CATEGORY_TDLS; + tf->action_code = WLAN_TDLS_SETUP_RESPONSE; + + skb_put(skb, sizeof(tf->u.setup_resp)); + tf->u.setup_resp.status_code = cpu_to_le16(status_code); + tf->u.setup_resp.dialog_token = dialog_token; + tf->u.setup_resp.capability = + cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); + + ieee80211_add_srates_ie(sdata, skb, false, band); + ieee80211_add_ext_srates_ie(sdata, skb, false, band); + ieee80211_tdls_add_ext_capab(skb); + break; + case WLAN_TDLS_SETUP_CONFIRM: + tf->category = WLAN_CATEGORY_TDLS; + tf->action_code = WLAN_TDLS_SETUP_CONFIRM; + + skb_put(skb, sizeof(tf->u.setup_cfm)); + tf->u.setup_cfm.status_code = cpu_to_le16(status_code); + tf->u.setup_cfm.dialog_token = dialog_token; + break; + case WLAN_TDLS_TEARDOWN: + tf->category = WLAN_CATEGORY_TDLS; + tf->action_code = WLAN_TDLS_TEARDOWN; + + skb_put(skb, sizeof(tf->u.teardown)); + tf->u.teardown.reason_code = cpu_to_le16(status_code); + break; + case WLAN_TDLS_DISCOVERY_REQUEST: + tf->category = WLAN_CATEGORY_TDLS; + tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; + + skb_put(skb, sizeof(tf->u.discover_req)); + tf->u.discover_req.dialog_token = dialog_token; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int +ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, u8 action_code, u8 dialog_token, + u16 status_code, struct sk_buff *skb) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + enum ieee80211_band band = ieee80211_get_sdata_band(sdata); + struct ieee80211_mgmt *mgmt; + + mgmt = (void *)skb_put(skb, 24); + memset(mgmt, 0, 24); + memcpy(mgmt->da, peer, ETH_ALEN); + memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); + memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); + + mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | + IEEE80211_STYPE_ACTION); + + switch (action_code) { + case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: + skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); + mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; + mgmt->u.action.u.tdls_discover_resp.action_code = + WLAN_PUB_ACTION_TDLS_DISCOVER_RES; + mgmt->u.action.u.tdls_discover_resp.dialog_token = + dialog_token; + mgmt->u.action.u.tdls_discover_resp.capability = + cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata)); + + ieee80211_add_srates_ie(sdata, skb, false, band); + ieee80211_add_ext_srates_ie(sdata, skb, false, band); + ieee80211_tdls_add_ext_capab(skb); + break; + default: + return -EINVAL; + } + + return 0; +} + +int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, u8 action_code, u8 dialog_token, + u16 status_code, u32 peer_capability, + const u8 *extra_ies, size_t extra_ies_len) +{ + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; + struct sk_buff *skb = NULL; + bool send_direct; + int ret; + + if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) + return -ENOTSUPP; + + /* make sure we are in managed mode, and associated */ + if (sdata->vif.type != NL80211_IFTYPE_STATION || + !sdata->u.mgd.associated) + return -EINVAL; + + tdls_dbg(sdata, "TDLS mgmt action %d peer %pM\n", + action_code, peer); + + skb = dev_alloc_skb(local->hw.extra_tx_headroom + + max(sizeof(struct ieee80211_mgmt), + sizeof(struct ieee80211_tdls_data)) + + 50 + /* supported rates */ + 7 + /* ext capab */ + extra_ies_len + + sizeof(struct ieee80211_tdls_lnkie)); + if (!skb) + return -ENOMEM; + + skb_reserve(skb, local->hw.extra_tx_headroom); + + switch (action_code) { + case WLAN_TDLS_SETUP_REQUEST: + case WLAN_TDLS_SETUP_RESPONSE: + case WLAN_TDLS_SETUP_CONFIRM: + case WLAN_TDLS_TEARDOWN: + case WLAN_TDLS_DISCOVERY_REQUEST: + ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer, + action_code, dialog_token, + status_code, skb); + send_direct = false; + break; + case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: + ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code, + dialog_token, status_code, + skb); + send_direct = true; + break; + default: + ret = -ENOTSUPP; + break; + } + + if (ret < 0) + goto fail; + + if (extra_ies_len) + memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); + + /* the TDLS link IE is always added last */ + switch (action_code) { + case WLAN_TDLS_SETUP_REQUEST: + case WLAN_TDLS_SETUP_CONFIRM: + case WLAN_TDLS_TEARDOWN: + case WLAN_TDLS_DISCOVERY_REQUEST: + /* we are the initiator */ + ieee80211_tdls_add_link_ie(skb, sdata->vif.addr, peer, + sdata->u.mgd.bssid); + break; + case WLAN_TDLS_SETUP_RESPONSE: + case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: + /* we are the responder */ + ieee80211_tdls_add_link_ie(skb, peer, sdata->vif.addr, + sdata->u.mgd.bssid); + break; + default: + ret = -ENOTSUPP; + goto fail; + } + + if (send_direct) { + ieee80211_tx_skb(sdata, skb); + return 0; + } + + /* + * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise + * we should default to AC_VI. + */ + switch (action_code) { + case WLAN_TDLS_SETUP_REQUEST: + case WLAN_TDLS_SETUP_RESPONSE: + skb_set_queue_mapping(skb, IEEE80211_AC_BK); + skb->priority = 2; + break; + default: + skb_set_queue_mapping(skb, IEEE80211_AC_VI); + skb->priority = 5; + break; + } + + /* disable bottom halves when entering the Tx path */ + local_bh_disable(); + ret = ieee80211_subif_start_xmit(skb, dev); + local_bh_enable(); + + return ret; + +fail: + dev_kfree_skb(skb); + return ret; +} + +int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, + const u8 *peer, enum nl80211_tdls_operation oper) +{ + struct sta_info *sta; + struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + + if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) + return -ENOTSUPP; + + if (sdata->vif.type != NL80211_IFTYPE_STATION) + return -EINVAL; + + tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); + + switch (oper) { + case NL80211_TDLS_ENABLE_LINK: + rcu_read_lock(); + sta = sta_info_get(sdata, peer); + if (!sta) { + rcu_read_unlock(); + return -ENOLINK; + } + + set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); + rcu_read_unlock(); + break; + case NL80211_TDLS_DISABLE_LINK: + return sta_info_destroy_addr(sdata, peer); + case NL80211_TDLS_TEARDOWN: + case NL80211_TDLS_SETUP: + case NL80211_TDLS_DISCOVERY_REQ: + /* We don't support in-driver setup/teardown/discovery */ + return -ENOTSUPP; + default: + return -ENOTSUPP; + } + + return 0; +} diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h index cec5b60487a4..cfe1a0688b5c 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -184,6 +184,20 @@ TRACE_EVENT(drv_return_bool, "true" : "false") ); +TRACE_EVENT(drv_return_u32, + TP_PROTO(struct ieee80211_local *local, u32 ret), + TP_ARGS(local, ret), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(u32, ret) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->ret = ret; + ), + TP_printk(LOCAL_PR_FMT " - %u", LOCAL_PR_ARG, __entry->ret) +); + TRACE_EVENT(drv_return_u64, TP_PROTO(struct ieee80211_local *local, u64 ret), TP_ARGS(local, ret), @@ -1375,6 +1389,91 @@ TRACE_EVENT(drv_change_chanctx, ) ); +#if !defined(__TRACE_VIF_ENTRY) +#define __TRACE_VIF_ENTRY +struct trace_vif_entry { + enum nl80211_iftype vif_type; + bool p2p; + char vif_name[IFNAMSIZ]; +} __packed; + +struct trace_chandef_entry { + u32 control_freq; + u32 chan_width; + u32 center_freq1; + u32 center_freq2; +} __packed; + +struct trace_switch_entry { + struct trace_vif_entry vif; + struct trace_chandef_entry old_chandef; + struct trace_chandef_entry new_chandef; +} __packed; + +#define SWITCH_ENTRY_ASSIGN(to, from) local_vifs[i].to = vifs[i].from +#endif + +TRACE_EVENT(drv_switch_vif_chanctx, + TP_PROTO(struct ieee80211_local *local, + struct ieee80211_vif_chanctx_switch *vifs, + int n_vifs, enum ieee80211_chanctx_switch_mode mode), + TP_ARGS(local, vifs, n_vifs, mode), + + TP_STRUCT__entry( + LOCAL_ENTRY + __field(int, n_vifs) + __field(u32, mode) + __dynamic_array(u8, vifs, + sizeof(struct trace_switch_entry) * n_vifs) + ), + + TP_fast_assign( + LOCAL_ASSIGN; + __entry->n_vifs = n_vifs; + __entry->mode = mode; + { + struct trace_switch_entry *local_vifs = + __get_dynamic_array(vifs); + int i; + + for (i = 0; i < n_vifs; i++) { + struct ieee80211_sub_if_data *sdata; + + sdata = container_of(vifs[i].vif, + struct ieee80211_sub_if_data, + vif); + + SWITCH_ENTRY_ASSIGN(vif.vif_type, vif->type); + SWITCH_ENTRY_ASSIGN(vif.p2p, vif->p2p); + strncpy(local_vifs[i].vif.vif_name, + sdata->name, + sizeof(local_vifs[i].vif.vif_name)); + SWITCH_ENTRY_ASSIGN(old_chandef.control_freq, + old_ctx->def.chan->center_freq); + SWITCH_ENTRY_ASSIGN(old_chandef.chan_width, + old_ctx->def.width); + SWITCH_ENTRY_ASSIGN(old_chandef.center_freq1, + old_ctx->def.center_freq1); + SWITCH_ENTRY_ASSIGN(old_chandef.center_freq2, + old_ctx->def.center_freq2); + SWITCH_ENTRY_ASSIGN(new_chandef.control_freq, + new_ctx->def.chan->center_freq); + SWITCH_ENTRY_ASSIGN(new_chandef.chan_width, + new_ctx->def.width); + SWITCH_ENTRY_ASSIGN(new_chandef.center_freq1, + new_ctx->def.center_freq1); + SWITCH_ENTRY_ASSIGN(new_chandef.center_freq2, + new_ctx->def.center_freq2); + } + } + ), + + TP_printk( + LOCAL_PR_FMT " n_vifs:%d mode:%d", + LOCAL_PR_ARG, __entry->n_vifs, __entry->mode + ) +); + DECLARE_EVENT_CLASS(local_sdata_chanctx, TP_PROTO(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata, @@ -1499,6 +1598,24 @@ DEFINE_EVENT(local_sdata_evt, drv_leave_ibss, TP_ARGS(local, sdata) ); +TRACE_EVENT(drv_get_expected_throughput, + TP_PROTO(struct ieee80211_sta *sta), + + TP_ARGS(sta), + + TP_STRUCT__entry( + STA_ENTRY + ), + + TP_fast_assign( + STA_ASSIGN; + ), + + TP_printk( + STA_PR_FMT, STA_PR_ARG + ) +); + /* * Tracing for API calls that drivers call. */ diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 19d36d4117e0..5214686d9fd1 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2328,7 +2328,8 @@ void ieee80211_tx_pending(unsigned long data) /* functions for drivers to get certain frames */ static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, - struct ps_data *ps, struct sk_buff *skb) + struct ps_data *ps, struct sk_buff *skb, + bool is_template) { u8 *pos, *tim; int aid0 = 0; @@ -2341,11 +2342,12 @@ static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, * checking byte-for-byte */ have_bits = !bitmap_empty((unsigned long *)ps->tim, IEEE80211_MAX_AID+1); - - if (ps->dtim_count == 0) - ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; - else - ps->dtim_count--; + if (!is_template) { + if (ps->dtim_count == 0) + ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1; + else + ps->dtim_count--; + } tim = pos = (u8 *) skb_put(skb, 6); *pos++ = WLAN_EID_TIM; @@ -2391,7 +2393,8 @@ static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, } static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, - struct ps_data *ps, struct sk_buff *skb) + struct ps_data *ps, struct sk_buff *skb, + bool is_template) { struct ieee80211_local *local = sdata->local; @@ -2403,24 +2406,24 @@ static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata, * of the tim bitmap in mac80211 and the driver. */ if (local->tim_in_locked_section) { - __ieee80211_beacon_add_tim(sdata, ps, skb); + __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); } else { spin_lock_bh(&local->tim_lock); - __ieee80211_beacon_add_tim(sdata, ps, skb); + __ieee80211_beacon_add_tim(sdata, ps, skb, is_template); spin_unlock_bh(&local->tim_lock); } return 0; } -static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata, - struct beacon_data *beacon) +static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata, + struct beacon_data *beacon) { 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; + int i; + u8 count = sdata->csa_current_counter; switch (sdata->vif.type) { case NL80211_IFTYPE_AP: @@ -2438,40 +2441,57 @@ static void ieee80211_update_csa(struct ieee80211_sub_if_data *sdata, default: return; } - if (WARN_ON(counter_offset_beacon >= beacon_data_len)) - return; - /* Warn if the driver did not check for/react to csa - * completeness. A beacon with CSA counter set to 0 should - * never occur, because a counter of 1 means switch just - * before the next beacon. - */ - if (WARN_ON(beacon_data[counter_offset_beacon] == 1)) - return; + for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) { + u16 counter_offset_beacon = + sdata->csa_counter_offset_beacon[i]; + u16 counter_offset_presp = sdata->csa_counter_offset_presp[i]; - beacon_data[counter_offset_beacon]--; + if (counter_offset_beacon) { + if (WARN_ON(counter_offset_beacon >= beacon_data_len)) + return; - if (sdata->vif.type == NL80211_IFTYPE_AP && counter_offset_presp) { - rcu_read_lock(); - resp = rcu_dereference(sdata->u.ap.probe_resp); + beacon_data[counter_offset_beacon] = count; + } + + if (sdata->vif.type == NL80211_IFTYPE_AP && + counter_offset_presp) { + rcu_read_lock(); + resp = rcu_dereference(sdata->u.ap.probe_resp); - /* if nl80211 accepted the offset, this should not happen. */ - if (WARN_ON(!resp)) { + /* If nl80211 accepted the offset, this should + * not happen. + */ + if (WARN_ON(!resp)) { + rcu_read_unlock(); + return; + } + resp->data[counter_offset_presp] = count; rcu_read_unlock(); - return; } - resp->data[counter_offset_presp]--; - rcu_read_unlock(); } } +u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif) +{ + struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); + + sdata->csa_current_counter--; + + /* the counter should never reach 0 */ + WARN_ON(!sdata->csa_current_counter); + + return sdata->csa_current_counter; +} +EXPORT_SYMBOL(ieee80211_csa_update_counter); + bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct beacon_data *beacon = NULL; u8 *beacon_data; size_t beacon_data_len; - int counter_beacon = sdata->csa_counter_offset_beacon; + int counter_beacon = sdata->csa_counter_offset_beacon[0]; int ret = false; if (!ieee80211_sdata_running(sdata)) @@ -2521,9 +2541,11 @@ bool ieee80211_csa_is_complete(struct ieee80211_vif *vif) } EXPORT_SYMBOL(ieee80211_csa_is_complete); -struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - u16 *tim_offset, u16 *tim_length) +static struct sk_buff * +__ieee80211_beacon_get(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_mutable_offsets *offs, + bool is_template) { struct ieee80211_local *local = hw_to_local(hw); struct sk_buff *skb = NULL; @@ -2532,6 +2554,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, enum ieee80211_band band; struct ieee80211_tx_rate_control txrc; struct ieee80211_chanctx_conf *chanctx_conf; + int csa_off_base = 0; rcu_read_lock(); @@ -2541,18 +2564,20 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, if (!ieee80211_sdata_running(sdata) || !chanctx_conf) goto out; - if (tim_offset) - *tim_offset = 0; - if (tim_length) - *tim_length = 0; + if (offs) + memset(offs, 0, sizeof(*offs)); if (sdata->vif.type == NL80211_IFTYPE_AP) { struct ieee80211_if_ap *ap = &sdata->u.ap; struct beacon_data *beacon = rcu_dereference(ap->beacon); if (beacon) { - if (sdata->vif.csa_active) - ieee80211_update_csa(sdata, beacon); + if (sdata->vif.csa_active) { + if (!is_template) + ieee80211_csa_update_counter(vif); + + ieee80211_set_csa(sdata, beacon); + } /* * headroom, head length, @@ -2569,12 +2594,16 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, memcpy(skb_put(skb, beacon->head_len), beacon->head, beacon->head_len); - ieee80211_beacon_add_tim(sdata, &ap->ps, skb); + ieee80211_beacon_add_tim(sdata, &ap->ps, skb, + is_template); - if (tim_offset) - *tim_offset = beacon->head_len; - if (tim_length) - *tim_length = skb->len - beacon->head_len; + if (offs) { + offs->tim_offset = beacon->head_len; + offs->tim_length = skb->len - beacon->head_len; + + /* for AP the csa offsets are from tail */ + csa_off_base = skb->len; + } if (beacon->tail) memcpy(skb_put(skb, beacon->tail_len), @@ -2589,9 +2618,12 @@ 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); + if (sdata->vif.csa_active) { + if (!is_template) + ieee80211_csa_update_counter(vif); + ieee80211_set_csa(sdata, presp); + } skb = dev_alloc_skb(local->tx_headroom + presp->head_len + local->hw.extra_beacon_tailroom); @@ -2611,8 +2643,17 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, if (!bcn) goto out; - if (sdata->vif.csa_active) - ieee80211_update_csa(sdata, bcn); + if (sdata->vif.csa_active) { + if (!is_template) + /* TODO: For mesh csa_counter is in TU, so + * decrementing it by one isn't correct, but + * for now we leave it consistent with overall + * mac80211's behavior. + */ + ieee80211_csa_update_counter(vif); + + ieee80211_set_csa(sdata, bcn); + } if (ifmsh->sync_ops) ifmsh->sync_ops->adjust_tbtt(sdata, bcn); @@ -2626,13 +2667,33 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, goto out; skb_reserve(skb, local->tx_headroom); memcpy(skb_put(skb, bcn->head_len), bcn->head, bcn->head_len); - ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb); + ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template); + + if (offs) { + offs->tim_offset = bcn->head_len; + offs->tim_length = skb->len - bcn->head_len; + } + memcpy(skb_put(skb, bcn->tail_len), bcn->tail, bcn->tail_len); } else { WARN_ON(1); goto out; } + /* CSA offsets */ + if (offs) { + int i; + + for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) { + u16 csa_off = sdata->csa_counter_offset_beacon[i]; + + if (!csa_off) + continue; + + offs->csa_counter_offs[i] = csa_off_base + csa_off; + } + } + band = chanctx_conf->def.chan->band; info = IEEE80211_SKB_CB(skb); @@ -2663,6 +2724,32 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, out: rcu_read_unlock(); return skb; + +} + +struct sk_buff * +ieee80211_beacon_get_template(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_mutable_offsets *offs) +{ + return __ieee80211_beacon_get(hw, vif, offs, true); +} +EXPORT_SYMBOL(ieee80211_beacon_get_template); + +struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u16 *tim_offset, u16 *tim_length) +{ + struct ieee80211_mutable_offsets offs = {}; + struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false); + + if (tim_offset) + *tim_offset = offs.tim_offset; + + if (tim_length) + *tim_length = offs.tim_length; + + return bcn; } EXPORT_SYMBOL(ieee80211_beacon_get_tim); diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 3c365837e910..6886601afe1c 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -554,7 +554,7 @@ void ieee80211_flush_queues(struct ieee80211_local *local, ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_FLUSH); - drv_flush(local, queues, false); + drv_flush(local, sdata, queues, false); ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, IEEE80211_QUEUE_STOP_REASON_FLUSH); @@ -1457,6 +1457,44 @@ void ieee80211_stop_device(struct ieee80211_local *local) drv_stop(local); } +static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) +{ + struct ieee80211_sub_if_data *sdata; + struct ieee80211_chanctx *ctx; + + /* + * We get here if during resume the device can't be restarted properly. + * We might also get here if this happens during HW reset, which is a + * slightly different situation and we need to drop all connections in + * the latter case. + * + * Ask cfg80211 to turn off all interfaces, this will result in more + * warnings but at least we'll then get into a clean stopped state. + */ + + local->resuming = false; + local->suspended = false; + local->started = false; + + /* scheduled scan clearly can't be running any more, but tell + * cfg80211 and clear local state + */ + ieee80211_sched_scan_end(local); + + list_for_each_entry(sdata, &local->interfaces, list) + sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; + + /* Mark channel contexts as not being in the driver any more to avoid + * removing them from the driver during the shutdown process... + */ + mutex_lock(&local->chanctx_mtx); + list_for_each_entry(ctx, &local->chanctx_list, list) + ctx->driver_present = false; + mutex_unlock(&local->chanctx_mtx); + + cfg80211_shutdown_all_interfaces(local->hw.wiphy); +} + static void ieee80211_assign_chanctx(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata) { @@ -1520,9 +1558,11 @@ int ieee80211_reconfig(struct ieee80211_local *local) */ res = drv_start(local); if (res) { - WARN(local->suspended, "Hardware became unavailable " - "upon resume. This could be a software issue " - "prior to suspend or a hardware issue.\n"); + if (local->suspended) + WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); + else + WARN(1, "Hardware became unavailable during restart.\n"); + ieee80211_handle_reconfig_failure(local); return res; } @@ -1546,7 +1586,7 @@ int ieee80211_reconfig(struct ieee80211_local *local) WARN_ON(local->resuming); res = drv_add_interface(local, sdata); if (WARN_ON(res)) { - rcu_assign_pointer(local->monitor_sdata, NULL); + RCU_INIT_POINTER(local->monitor_sdata, NULL); synchronize_net(); kfree(sdata); } @@ -1565,17 +1605,17 @@ int ieee80211_reconfig(struct ieee80211_local *local) list_for_each_entry(ctx, &local->chanctx_list, list) WARN_ON(drv_add_chanctx(local, ctx)); mutex_unlock(&local->chanctx_mtx); - } - list_for_each_entry(sdata, &local->interfaces, list) { - if (!ieee80211_sdata_running(sdata)) - continue; - ieee80211_assign_chanctx(local, sdata); - } + list_for_each_entry(sdata, &local->interfaces, list) { + if (!ieee80211_sdata_running(sdata)) + continue; + ieee80211_assign_chanctx(local, sdata); + } - sdata = rtnl_dereference(local->monitor_sdata); - if (sdata && ieee80211_sdata_running(sdata)) - ieee80211_assign_chanctx(local, sdata); + sdata = rtnl_dereference(local->monitor_sdata); + if (sdata && ieee80211_sdata_running(sdata)) + ieee80211_assign_chanctx(local, sdata); + } /* add STAs back */ mutex_lock(&local->sta_mtx); @@ -1671,13 +1711,10 @@ int ieee80211_reconfig(struct ieee80211_local *local) } break; case NL80211_IFTYPE_WDS: - break; case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_MONITOR: - /* ignore virtual */ - break; case NL80211_IFTYPE_P2P_DEVICE: - changed = BSS_CHANGED_IDLE; + /* nothing to do */ break; case NL80211_IFTYPE_UNSPECIFIED: case NUM_NL80211_IFTYPES: @@ -2797,3 +2834,121 @@ void ieee80211_recalc_dtim(struct ieee80211_local *local, ps->dtim_count = dtim_count; } + +int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + enum ieee80211_chanctx_mode chanmode, + u8 radar_detect) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_sub_if_data *sdata_iter; + enum nl80211_iftype iftype = sdata->wdev.iftype; + int num[NUM_NL80211_IFTYPES]; + struct ieee80211_chanctx *ctx; + int num_different_channels = 0; + int total = 1; + + lockdep_assert_held(&local->chanctx_mtx); + + if (WARN_ON(hweight32(radar_detect) > 1)) + return -EINVAL; + + if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && + !chandef->chan)) + return -EINVAL; + + if (chandef) + num_different_channels = 1; + + if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) + return -EINVAL; + + /* Always allow software iftypes */ + if (local->hw.wiphy->software_iftypes & BIT(iftype)) { + if (radar_detect) + return -EINVAL; + return 0; + } + + memset(num, 0, sizeof(num)); + + if (iftype != NL80211_IFTYPE_UNSPECIFIED) + num[iftype] = 1; + + list_for_each_entry(ctx, &local->chanctx_list, list) { + if (ctx->conf.radar_enabled) + radar_detect |= BIT(ctx->conf.def.width); + if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { + num_different_channels++; + continue; + } + if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && + cfg80211_chandef_compatible(chandef, + &ctx->conf.def)) + continue; + num_different_channels++; + } + + list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { + struct wireless_dev *wdev_iter; + + wdev_iter = &sdata_iter->wdev; + + if (sdata_iter == sdata || + rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL || + local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) + continue; + + num[wdev_iter->iftype]++; + total++; + } + + if (total == 1 && !radar_detect) + return 0; + + return cfg80211_check_combinations(local->hw.wiphy, + num_different_channels, + radar_detect, num); +} + +static void +ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, + void *data) +{ + u32 *max_num_different_channels = data; + + *max_num_different_channels = max(*max_num_different_channels, + c->num_different_channels); +} + +int ieee80211_max_num_channels(struct ieee80211_local *local) +{ + struct ieee80211_sub_if_data *sdata; + int num[NUM_NL80211_IFTYPES] = {}; + struct ieee80211_chanctx *ctx; + int num_different_channels = 0; + u8 radar_detect = 0; + u32 max_num_different_channels = 1; + int err; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(ctx, &local->chanctx_list, list) { + num_different_channels++; + + if (ctx->conf.radar_enabled) + radar_detect |= BIT(ctx->conf.def.width); + } + + list_for_each_entry_rcu(sdata, &local->interfaces, list) + num[sdata->wdev.iftype]++; + + err = cfg80211_iter_combinations(local->hw.wiphy, + num_different_channels, radar_detect, + num, ieee80211_iter_max_chans, + &max_num_different_channels); + if (err < 0) + return err; + + return max_num_different_channels; +} diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index b8600e3c29c8..9b3dcc201145 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -406,7 +406,10 @@ static int ccmp_encrypt_skb(struct ieee80211_tx_data *tx, struct sk_buff *skb) if (info->control.hw_key && !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_GENERATE_IV) && - !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE)) { + !(info->control.hw_key->flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE) && + !((info->control.hw_key->flags & + IEEE80211_KEY_FLAG_GENERATE_IV_MGMT) && + ieee80211_is_mgmt(hdr->frame_control))) { /* * hwaccel has no need for preallocated room for CCMP * header or MIC fields |